1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2016 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 const char *filename
= get_section_file_name (section
);
4386 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4387 error (_("Dwarf Error: wrong version in compilation unit header "
4388 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4391 if (header
->abbrev_offset
.sect_off
4392 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4393 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4394 "(offset 0x%lx + 6) [in module %s]"),
4395 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4398 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4399 avoid potential 32-bit overflow. */
4400 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4402 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4403 "(offset 0x%lx + 0) [in module %s]"),
4404 (long) header
->length
, (long) header
->offset
.sect_off
,
4408 /* Read in a CU/TU header and perform some basic error checking.
4409 The contents of the header are stored in HEADER.
4410 The result is a pointer to the start of the first DIE. */
4412 static const gdb_byte
*
4413 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4414 struct dwarf2_section_info
*section
,
4415 struct dwarf2_section_info
*abbrev_section
,
4416 const gdb_byte
*info_ptr
,
4417 int is_debug_types_section
)
4419 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4420 bfd
*abfd
= get_section_bfd_owner (section
);
4422 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4424 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4426 /* If we're reading a type unit, skip over the signature and
4427 type_offset fields. */
4428 if (is_debug_types_section
)
4429 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4431 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4433 error_check_comp_unit_head (header
, section
, abbrev_section
);
4438 /* Read in the types comp unit header information from .debug_types entry at
4439 types_ptr. The result is a pointer to one past the end of the header. */
4441 static const gdb_byte
*
4442 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4443 struct dwarf2_section_info
*section
,
4444 struct dwarf2_section_info
*abbrev_section
,
4445 const gdb_byte
*info_ptr
,
4446 ULONGEST
*signature
,
4447 cu_offset
*type_offset_in_tu
)
4449 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4450 bfd
*abfd
= get_section_bfd_owner (section
);
4452 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4454 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4456 /* If we're reading a type unit, skip over the signature and
4457 type_offset fields. */
4458 if (signature
!= NULL
)
4459 *signature
= read_8_bytes (abfd
, info_ptr
);
4461 if (type_offset_in_tu
!= NULL
)
4462 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4463 header
->offset_size
);
4464 info_ptr
+= header
->offset_size
;
4466 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4468 error_check_comp_unit_head (header
, section
, abbrev_section
);
4473 /* Fetch the abbreviation table offset from a comp or type unit header. */
4476 read_abbrev_offset (struct dwarf2_section_info
*section
,
4479 bfd
*abfd
= get_section_bfd_owner (section
);
4480 const gdb_byte
*info_ptr
;
4481 unsigned int length
, initial_length_size
, offset_size
;
4482 sect_offset abbrev_offset
;
4484 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4485 info_ptr
= section
->buffer
+ offset
.sect_off
;
4486 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4487 offset_size
= initial_length_size
== 4 ? 4 : 8;
4488 info_ptr
+= initial_length_size
+ 2 /*version*/;
4489 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4490 return abbrev_offset
;
4493 /* Allocate a new partial symtab for file named NAME and mark this new
4494 partial symtab as being an include of PST. */
4497 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4498 struct objfile
*objfile
)
4500 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4502 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4504 /* It shares objfile->objfile_obstack. */
4505 subpst
->dirname
= pst
->dirname
;
4508 subpst
->textlow
= 0;
4509 subpst
->texthigh
= 0;
4511 subpst
->dependencies
4512 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4513 subpst
->dependencies
[0] = pst
;
4514 subpst
->number_of_dependencies
= 1;
4516 subpst
->globals_offset
= 0;
4517 subpst
->n_global_syms
= 0;
4518 subpst
->statics_offset
= 0;
4519 subpst
->n_static_syms
= 0;
4520 subpst
->compunit_symtab
= NULL
;
4521 subpst
->read_symtab
= pst
->read_symtab
;
4524 /* No private part is necessary for include psymtabs. This property
4525 can be used to differentiate between such include psymtabs and
4526 the regular ones. */
4527 subpst
->read_symtab_private
= NULL
;
4530 /* Read the Line Number Program data and extract the list of files
4531 included by the source file represented by PST. Build an include
4532 partial symtab for each of these included files. */
4535 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4536 struct die_info
*die
,
4537 struct partial_symtab
*pst
)
4539 struct line_header
*lh
= NULL
;
4540 struct attribute
*attr
;
4542 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4544 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4546 return; /* No linetable, so no includes. */
4548 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4549 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4551 free_line_header (lh
);
4555 hash_signatured_type (const void *item
)
4557 const struct signatured_type
*sig_type
4558 = (const struct signatured_type
*) item
;
4560 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4561 return sig_type
->signature
;
4565 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4567 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4568 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4570 return lhs
->signature
== rhs
->signature
;
4573 /* Allocate a hash table for signatured types. */
4576 allocate_signatured_type_table (struct objfile
*objfile
)
4578 return htab_create_alloc_ex (41,
4579 hash_signatured_type
,
4582 &objfile
->objfile_obstack
,
4583 hashtab_obstack_allocate
,
4584 dummy_obstack_deallocate
);
4587 /* A helper function to add a signatured type CU to a table. */
4590 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4592 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4593 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4601 /* Create the hash table of all entries in the .debug_types
4602 (or .debug_types.dwo) section(s).
4603 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4604 otherwise it is NULL.
4606 The result is a pointer to the hash table or NULL if there are no types.
4608 Note: This function processes DWO files only, not DWP files. */
4611 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4612 VEC (dwarf2_section_info_def
) *types
)
4614 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4615 htab_t types_htab
= NULL
;
4617 struct dwarf2_section_info
*section
;
4618 struct dwarf2_section_info
*abbrev_section
;
4620 if (VEC_empty (dwarf2_section_info_def
, types
))
4623 abbrev_section
= (dwo_file
!= NULL
4624 ? &dwo_file
->sections
.abbrev
4625 : &dwarf2_per_objfile
->abbrev
);
4627 if (dwarf_read_debug
)
4628 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4629 dwo_file
? ".dwo" : "",
4630 get_section_file_name (abbrev_section
));
4633 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4637 const gdb_byte
*info_ptr
, *end_ptr
;
4639 dwarf2_read_section (objfile
, section
);
4640 info_ptr
= section
->buffer
;
4642 if (info_ptr
== NULL
)
4645 /* We can't set abfd until now because the section may be empty or
4646 not present, in which case the bfd is unknown. */
4647 abfd
= get_section_bfd_owner (section
);
4649 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4650 because we don't need to read any dies: the signature is in the
4653 end_ptr
= info_ptr
+ section
->size
;
4654 while (info_ptr
< end_ptr
)
4657 cu_offset type_offset_in_tu
;
4659 struct signatured_type
*sig_type
;
4660 struct dwo_unit
*dwo_tu
;
4662 const gdb_byte
*ptr
= info_ptr
;
4663 struct comp_unit_head header
;
4664 unsigned int length
;
4666 offset
.sect_off
= ptr
- section
->buffer
;
4668 /* We need to read the type's signature in order to build the hash
4669 table, but we don't need anything else just yet. */
4671 ptr
= read_and_check_type_unit_head (&header
, section
,
4672 abbrev_section
, ptr
,
4673 &signature
, &type_offset_in_tu
);
4675 length
= get_cu_length (&header
);
4677 /* Skip dummy type units. */
4678 if (ptr
>= info_ptr
+ length
4679 || peek_abbrev_code (abfd
, ptr
) == 0)
4685 if (types_htab
== NULL
)
4688 types_htab
= allocate_dwo_unit_table (objfile
);
4690 types_htab
= allocate_signatured_type_table (objfile
);
4696 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4698 dwo_tu
->dwo_file
= dwo_file
;
4699 dwo_tu
->signature
= signature
;
4700 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4701 dwo_tu
->section
= section
;
4702 dwo_tu
->offset
= offset
;
4703 dwo_tu
->length
= length
;
4707 /* N.B.: type_offset is not usable if this type uses a DWO file.
4708 The real type_offset is in the DWO file. */
4710 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4711 struct signatured_type
);
4712 sig_type
->signature
= signature
;
4713 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4714 sig_type
->per_cu
.objfile
= objfile
;
4715 sig_type
->per_cu
.is_debug_types
= 1;
4716 sig_type
->per_cu
.section
= section
;
4717 sig_type
->per_cu
.offset
= offset
;
4718 sig_type
->per_cu
.length
= length
;
4721 slot
= htab_find_slot (types_htab
,
4722 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4724 gdb_assert (slot
!= NULL
);
4727 sect_offset dup_offset
;
4731 const struct dwo_unit
*dup_tu
4732 = (const struct dwo_unit
*) *slot
;
4734 dup_offset
= dup_tu
->offset
;
4738 const struct signatured_type
*dup_tu
4739 = (const struct signatured_type
*) *slot
;
4741 dup_offset
= dup_tu
->per_cu
.offset
;
4744 complaint (&symfile_complaints
,
4745 _("debug type entry at offset 0x%x is duplicate to"
4746 " the entry at offset 0x%x, signature %s"),
4747 offset
.sect_off
, dup_offset
.sect_off
,
4748 hex_string (signature
));
4750 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4752 if (dwarf_read_debug
> 1)
4753 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4755 hex_string (signature
));
4764 /* Create the hash table of all entries in the .debug_types section,
4765 and initialize all_type_units.
4766 The result is zero if there is an error (e.g. missing .debug_types section),
4767 otherwise non-zero. */
4770 create_all_type_units (struct objfile
*objfile
)
4773 struct signatured_type
**iter
;
4775 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4776 if (types_htab
== NULL
)
4778 dwarf2_per_objfile
->signatured_types
= NULL
;
4782 dwarf2_per_objfile
->signatured_types
= types_htab
;
4784 dwarf2_per_objfile
->n_type_units
4785 = dwarf2_per_objfile
->n_allocated_type_units
4786 = htab_elements (types_htab
);
4787 dwarf2_per_objfile
->all_type_units
=
4788 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4789 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4790 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4791 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4792 == dwarf2_per_objfile
->n_type_units
);
4797 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4798 If SLOT is non-NULL, it is the entry to use in the hash table.
4799 Otherwise we find one. */
4801 static struct signatured_type
*
4802 add_type_unit (ULONGEST sig
, void **slot
)
4804 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4805 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4806 struct signatured_type
*sig_type
;
4808 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4810 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4812 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4813 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4814 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4815 dwarf2_per_objfile
->all_type_units
4816 = XRESIZEVEC (struct signatured_type
*,
4817 dwarf2_per_objfile
->all_type_units
,
4818 dwarf2_per_objfile
->n_allocated_type_units
);
4819 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4821 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4823 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4824 struct signatured_type
);
4825 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4826 sig_type
->signature
= sig
;
4827 sig_type
->per_cu
.is_debug_types
= 1;
4828 if (dwarf2_per_objfile
->using_index
)
4830 sig_type
->per_cu
.v
.quick
=
4831 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4832 struct dwarf2_per_cu_quick_data
);
4837 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4840 gdb_assert (*slot
== NULL
);
4842 /* The rest of sig_type must be filled in by the caller. */
4846 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4847 Fill in SIG_ENTRY with DWO_ENTRY. */
4850 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4851 struct signatured_type
*sig_entry
,
4852 struct dwo_unit
*dwo_entry
)
4854 /* Make sure we're not clobbering something we don't expect to. */
4855 gdb_assert (! sig_entry
->per_cu
.queued
);
4856 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4857 if (dwarf2_per_objfile
->using_index
)
4859 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4860 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4863 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4864 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4865 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4866 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4867 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4869 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4870 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4871 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4872 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4873 sig_entry
->per_cu
.objfile
= objfile
;
4874 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4875 sig_entry
->dwo_unit
= dwo_entry
;
4878 /* Subroutine of lookup_signatured_type.
4879 If we haven't read the TU yet, create the signatured_type data structure
4880 for a TU to be read in directly from a DWO file, bypassing the stub.
4881 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4882 using .gdb_index, then when reading a CU we want to stay in the DWO file
4883 containing that CU. Otherwise we could end up reading several other DWO
4884 files (due to comdat folding) to process the transitive closure of all the
4885 mentioned TUs, and that can be slow. The current DWO file will have every
4886 type signature that it needs.
4887 We only do this for .gdb_index because in the psymtab case we already have
4888 to read all the DWOs to build the type unit groups. */
4890 static struct signatured_type
*
4891 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4893 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4894 struct dwo_file
*dwo_file
;
4895 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4896 struct signatured_type find_sig_entry
, *sig_entry
;
4899 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4901 /* If TU skeletons have been removed then we may not have read in any
4903 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4905 dwarf2_per_objfile
->signatured_types
4906 = allocate_signatured_type_table (objfile
);
4909 /* We only ever need to read in one copy of a signatured type.
4910 Use the global signatured_types array to do our own comdat-folding
4911 of types. If this is the first time we're reading this TU, and
4912 the TU has an entry in .gdb_index, replace the recorded data from
4913 .gdb_index with this TU. */
4915 find_sig_entry
.signature
= sig
;
4916 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4917 &find_sig_entry
, INSERT
);
4918 sig_entry
= (struct signatured_type
*) *slot
;
4920 /* We can get here with the TU already read, *or* in the process of being
4921 read. Don't reassign the global entry to point to this DWO if that's
4922 the case. Also note that if the TU is already being read, it may not
4923 have come from a DWO, the program may be a mix of Fission-compiled
4924 code and non-Fission-compiled code. */
4926 /* Have we already tried to read this TU?
4927 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4928 needn't exist in the global table yet). */
4929 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4932 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4933 dwo_unit of the TU itself. */
4934 dwo_file
= cu
->dwo_unit
->dwo_file
;
4936 /* Ok, this is the first time we're reading this TU. */
4937 if (dwo_file
->tus
== NULL
)
4939 find_dwo_entry
.signature
= sig
;
4940 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
4941 if (dwo_entry
== NULL
)
4944 /* If the global table doesn't have an entry for this TU, add one. */
4945 if (sig_entry
== NULL
)
4946 sig_entry
= add_type_unit (sig
, slot
);
4948 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4949 sig_entry
->per_cu
.tu_read
= 1;
4953 /* Subroutine of lookup_signatured_type.
4954 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4955 then try the DWP file. If the TU stub (skeleton) has been removed then
4956 it won't be in .gdb_index. */
4958 static struct signatured_type
*
4959 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4961 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4962 struct dwp_file
*dwp_file
= get_dwp_file ();
4963 struct dwo_unit
*dwo_entry
;
4964 struct signatured_type find_sig_entry
, *sig_entry
;
4967 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4968 gdb_assert (dwp_file
!= NULL
);
4970 /* If TU skeletons have been removed then we may not have read in any
4972 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4974 dwarf2_per_objfile
->signatured_types
4975 = allocate_signatured_type_table (objfile
);
4978 find_sig_entry
.signature
= sig
;
4979 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4980 &find_sig_entry
, INSERT
);
4981 sig_entry
= (struct signatured_type
*) *slot
;
4983 /* Have we already tried to read this TU?
4984 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4985 needn't exist in the global table yet). */
4986 if (sig_entry
!= NULL
)
4989 if (dwp_file
->tus
== NULL
)
4991 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4992 sig
, 1 /* is_debug_types */);
4993 if (dwo_entry
== NULL
)
4996 sig_entry
= add_type_unit (sig
, slot
);
4997 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5002 /* Lookup a signature based type for DW_FORM_ref_sig8.
5003 Returns NULL if signature SIG is not present in the table.
5004 It is up to the caller to complain about this. */
5006 static struct signatured_type
*
5007 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5010 && dwarf2_per_objfile
->using_index
)
5012 /* We're in a DWO/DWP file, and we're using .gdb_index.
5013 These cases require special processing. */
5014 if (get_dwp_file () == NULL
)
5015 return lookup_dwo_signatured_type (cu
, sig
);
5017 return lookup_dwp_signatured_type (cu
, sig
);
5021 struct signatured_type find_entry
, *entry
;
5023 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5025 find_entry
.signature
= sig
;
5026 entry
= ((struct signatured_type
*)
5027 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5032 /* Low level DIE reading support. */
5034 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5037 init_cu_die_reader (struct die_reader_specs
*reader
,
5038 struct dwarf2_cu
*cu
,
5039 struct dwarf2_section_info
*section
,
5040 struct dwo_file
*dwo_file
)
5042 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5043 reader
->abfd
= get_section_bfd_owner (section
);
5045 reader
->dwo_file
= dwo_file
;
5046 reader
->die_section
= section
;
5047 reader
->buffer
= section
->buffer
;
5048 reader
->buffer_end
= section
->buffer
+ section
->size
;
5049 reader
->comp_dir
= NULL
;
5052 /* Subroutine of init_cutu_and_read_dies to simplify it.
5053 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5054 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5057 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5058 from it to the DIE in the DWO. If NULL we are skipping the stub.
5059 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5060 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5061 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5062 STUB_COMP_DIR may be non-NULL.
5063 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5064 are filled in with the info of the DIE from the DWO file.
5065 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5066 provided an abbrev table to use.
5067 The result is non-zero if a valid (non-dummy) DIE was found. */
5070 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5071 struct dwo_unit
*dwo_unit
,
5072 int abbrev_table_provided
,
5073 struct die_info
*stub_comp_unit_die
,
5074 const char *stub_comp_dir
,
5075 struct die_reader_specs
*result_reader
,
5076 const gdb_byte
**result_info_ptr
,
5077 struct die_info
**result_comp_unit_die
,
5078 int *result_has_children
)
5080 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5081 struct dwarf2_cu
*cu
= this_cu
->cu
;
5082 struct dwarf2_section_info
*section
;
5084 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5085 ULONGEST signature
; /* Or dwo_id. */
5086 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5087 int i
,num_extra_attrs
;
5088 struct dwarf2_section_info
*dwo_abbrev_section
;
5089 struct attribute
*attr
;
5090 struct die_info
*comp_unit_die
;
5092 /* At most one of these may be provided. */
5093 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5095 /* These attributes aren't processed until later:
5096 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5097 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5098 referenced later. However, these attributes are found in the stub
5099 which we won't have later. In order to not impose this complication
5100 on the rest of the code, we read them here and copy them to the
5109 if (stub_comp_unit_die
!= NULL
)
5111 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5113 if (! this_cu
->is_debug_types
)
5114 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5115 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5116 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5117 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5118 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5120 /* There should be a DW_AT_addr_base attribute here (if needed).
5121 We need the value before we can process DW_FORM_GNU_addr_index. */
5123 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5125 cu
->addr_base
= DW_UNSND (attr
);
5127 /* There should be a DW_AT_ranges_base attribute here (if needed).
5128 We need the value before we can process DW_AT_ranges. */
5129 cu
->ranges_base
= 0;
5130 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5132 cu
->ranges_base
= DW_UNSND (attr
);
5134 else if (stub_comp_dir
!= NULL
)
5136 /* Reconstruct the comp_dir attribute to simplify the code below. */
5137 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5138 comp_dir
->name
= DW_AT_comp_dir
;
5139 comp_dir
->form
= DW_FORM_string
;
5140 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5141 DW_STRING (comp_dir
) = stub_comp_dir
;
5144 /* Set up for reading the DWO CU/TU. */
5145 cu
->dwo_unit
= dwo_unit
;
5146 section
= dwo_unit
->section
;
5147 dwarf2_read_section (objfile
, section
);
5148 abfd
= get_section_bfd_owner (section
);
5149 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5150 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5151 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5153 if (this_cu
->is_debug_types
)
5155 ULONGEST header_signature
;
5156 cu_offset type_offset_in_tu
;
5157 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5159 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5163 &type_offset_in_tu
);
5164 /* This is not an assert because it can be caused by bad debug info. */
5165 if (sig_type
->signature
!= header_signature
)
5167 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5168 " TU at offset 0x%x [in module %s]"),
5169 hex_string (sig_type
->signature
),
5170 hex_string (header_signature
),
5171 dwo_unit
->offset
.sect_off
,
5172 bfd_get_filename (abfd
));
5174 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5175 /* For DWOs coming from DWP files, we don't know the CU length
5176 nor the type's offset in the TU until now. */
5177 dwo_unit
->length
= get_cu_length (&cu
->header
);
5178 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5180 /* Establish the type offset that can be used to lookup the type.
5181 For DWO files, we don't know it until now. */
5182 sig_type
->type_offset_in_section
.sect_off
=
5183 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5187 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5190 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5191 /* For DWOs coming from DWP files, we don't know the CU length
5193 dwo_unit
->length
= get_cu_length (&cu
->header
);
5196 /* Replace the CU's original abbrev table with the DWO's.
5197 Reminder: We can't read the abbrev table until we've read the header. */
5198 if (abbrev_table_provided
)
5200 /* Don't free the provided abbrev table, the caller of
5201 init_cutu_and_read_dies owns it. */
5202 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5203 /* Ensure the DWO abbrev table gets freed. */
5204 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5208 dwarf2_free_abbrev_table (cu
);
5209 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5210 /* Leave any existing abbrev table cleanup as is. */
5213 /* Read in the die, but leave space to copy over the attributes
5214 from the stub. This has the benefit of simplifying the rest of
5215 the code - all the work to maintain the illusion of a single
5216 DW_TAG_{compile,type}_unit DIE is done here. */
5217 num_extra_attrs
= ((stmt_list
!= NULL
)
5221 + (comp_dir
!= NULL
));
5222 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5223 result_has_children
, num_extra_attrs
);
5225 /* Copy over the attributes from the stub to the DIE we just read in. */
5226 comp_unit_die
= *result_comp_unit_die
;
5227 i
= comp_unit_die
->num_attrs
;
5228 if (stmt_list
!= NULL
)
5229 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5231 comp_unit_die
->attrs
[i
++] = *low_pc
;
5232 if (high_pc
!= NULL
)
5233 comp_unit_die
->attrs
[i
++] = *high_pc
;
5235 comp_unit_die
->attrs
[i
++] = *ranges
;
5236 if (comp_dir
!= NULL
)
5237 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5238 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5240 if (dwarf_die_debug
)
5242 fprintf_unfiltered (gdb_stdlog
,
5243 "Read die from %s@0x%x of %s:\n",
5244 get_section_name (section
),
5245 (unsigned) (begin_info_ptr
- section
->buffer
),
5246 bfd_get_filename (abfd
));
5247 dump_die (comp_unit_die
, dwarf_die_debug
);
5250 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5251 TUs by skipping the stub and going directly to the entry in the DWO file.
5252 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5253 to get it via circuitous means. Blech. */
5254 if (comp_dir
!= NULL
)
5255 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5257 /* Skip dummy compilation units. */
5258 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5259 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5262 *result_info_ptr
= info_ptr
;
5266 /* Subroutine of init_cutu_and_read_dies to simplify it.
5267 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5268 Returns NULL if the specified DWO unit cannot be found. */
5270 static struct dwo_unit
*
5271 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5272 struct die_info
*comp_unit_die
)
5274 struct dwarf2_cu
*cu
= this_cu
->cu
;
5275 struct attribute
*attr
;
5277 struct dwo_unit
*dwo_unit
;
5278 const char *comp_dir
, *dwo_name
;
5280 gdb_assert (cu
!= NULL
);
5282 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5283 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5284 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5286 if (this_cu
->is_debug_types
)
5288 struct signatured_type
*sig_type
;
5290 /* Since this_cu is the first member of struct signatured_type,
5291 we can go from a pointer to one to a pointer to the other. */
5292 sig_type
= (struct signatured_type
*) this_cu
;
5293 signature
= sig_type
->signature
;
5294 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5298 struct attribute
*attr
;
5300 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5302 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5304 dwo_name
, objfile_name (this_cu
->objfile
));
5305 signature
= DW_UNSND (attr
);
5306 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5313 /* Subroutine of init_cutu_and_read_dies to simplify it.
5314 See it for a description of the parameters.
5315 Read a TU directly from a DWO file, bypassing the stub.
5317 Note: This function could be a little bit simpler if we shared cleanups
5318 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5319 to do, so we keep this function self-contained. Or we could move this
5320 into our caller, but it's complex enough already. */
5323 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5324 int use_existing_cu
, int keep
,
5325 die_reader_func_ftype
*die_reader_func
,
5328 struct dwarf2_cu
*cu
;
5329 struct signatured_type
*sig_type
;
5330 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5331 struct die_reader_specs reader
;
5332 const gdb_byte
*info_ptr
;
5333 struct die_info
*comp_unit_die
;
5336 /* Verify we can do the following downcast, and that we have the
5338 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5339 sig_type
= (struct signatured_type
*) this_cu
;
5340 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5342 cleanups
= make_cleanup (null_cleanup
, NULL
);
5344 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5346 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5348 /* There's no need to do the rereading_dwo_cu handling that
5349 init_cutu_and_read_dies does since we don't read the stub. */
5353 /* If !use_existing_cu, this_cu->cu must be NULL. */
5354 gdb_assert (this_cu
->cu
== NULL
);
5355 cu
= XNEW (struct dwarf2_cu
);
5356 init_one_comp_unit (cu
, this_cu
);
5357 /* If an error occurs while loading, release our storage. */
5358 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5361 /* A future optimization, if needed, would be to use an existing
5362 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5363 could share abbrev tables. */
5365 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5366 0 /* abbrev_table_provided */,
5367 NULL
/* stub_comp_unit_die */,
5368 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5370 &comp_unit_die
, &has_children
) == 0)
5373 do_cleanups (cleanups
);
5377 /* All the "real" work is done here. */
5378 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5380 /* This duplicates the code in init_cutu_and_read_dies,
5381 but the alternative is making the latter more complex.
5382 This function is only for the special case of using DWO files directly:
5383 no point in overly complicating the general case just to handle this. */
5384 if (free_cu_cleanup
!= NULL
)
5388 /* We've successfully allocated this compilation unit. Let our
5389 caller clean it up when finished with it. */
5390 discard_cleanups (free_cu_cleanup
);
5392 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5393 So we have to manually free the abbrev table. */
5394 dwarf2_free_abbrev_table (cu
);
5396 /* Link this CU into read_in_chain. */
5397 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5398 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5401 do_cleanups (free_cu_cleanup
);
5404 do_cleanups (cleanups
);
5407 /* Initialize a CU (or TU) and read its DIEs.
5408 If the CU defers to a DWO file, read the DWO file as well.
5410 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5411 Otherwise the table specified in the comp unit header is read in and used.
5412 This is an optimization for when we already have the abbrev table.
5414 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5415 Otherwise, a new CU is allocated with xmalloc.
5417 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5418 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5420 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5421 linker) then DIE_READER_FUNC will not get called. */
5424 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5425 struct abbrev_table
*abbrev_table
,
5426 int use_existing_cu
, int keep
,
5427 die_reader_func_ftype
*die_reader_func
,
5430 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5431 struct dwarf2_section_info
*section
= this_cu
->section
;
5432 bfd
*abfd
= get_section_bfd_owner (section
);
5433 struct dwarf2_cu
*cu
;
5434 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5435 struct die_reader_specs reader
;
5436 struct die_info
*comp_unit_die
;
5438 struct attribute
*attr
;
5439 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5440 struct signatured_type
*sig_type
= NULL
;
5441 struct dwarf2_section_info
*abbrev_section
;
5442 /* Non-zero if CU currently points to a DWO file and we need to
5443 reread it. When this happens we need to reread the skeleton die
5444 before we can reread the DWO file (this only applies to CUs, not TUs). */
5445 int rereading_dwo_cu
= 0;
5447 if (dwarf_die_debug
)
5448 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5449 this_cu
->is_debug_types
? "type" : "comp",
5450 this_cu
->offset
.sect_off
);
5452 if (use_existing_cu
)
5455 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5456 file (instead of going through the stub), short-circuit all of this. */
5457 if (this_cu
->reading_dwo_directly
)
5459 /* Narrow down the scope of possibilities to have to understand. */
5460 gdb_assert (this_cu
->is_debug_types
);
5461 gdb_assert (abbrev_table
== NULL
);
5462 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5463 die_reader_func
, data
);
5467 cleanups
= make_cleanup (null_cleanup
, NULL
);
5469 /* This is cheap if the section is already read in. */
5470 dwarf2_read_section (objfile
, section
);
5472 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5474 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5476 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5479 /* If this CU is from a DWO file we need to start over, we need to
5480 refetch the attributes from the skeleton CU.
5481 This could be optimized by retrieving those attributes from when we
5482 were here the first time: the previous comp_unit_die was stored in
5483 comp_unit_obstack. But there's no data yet that we need this
5485 if (cu
->dwo_unit
!= NULL
)
5486 rereading_dwo_cu
= 1;
5490 /* If !use_existing_cu, this_cu->cu must be NULL. */
5491 gdb_assert (this_cu
->cu
== NULL
);
5492 cu
= XNEW (struct dwarf2_cu
);
5493 init_one_comp_unit (cu
, this_cu
);
5494 /* If an error occurs while loading, release our storage. */
5495 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5498 /* Get the header. */
5499 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5501 /* We already have the header, there's no need to read it in again. */
5502 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5506 if (this_cu
->is_debug_types
)
5509 cu_offset type_offset_in_tu
;
5511 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5512 abbrev_section
, info_ptr
,
5514 &type_offset_in_tu
);
5516 /* Since per_cu is the first member of struct signatured_type,
5517 we can go from a pointer to one to a pointer to the other. */
5518 sig_type
= (struct signatured_type
*) this_cu
;
5519 gdb_assert (sig_type
->signature
== signature
);
5520 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5521 == type_offset_in_tu
.cu_off
);
5522 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5524 /* LENGTH has not been set yet for type units if we're
5525 using .gdb_index. */
5526 this_cu
->length
= get_cu_length (&cu
->header
);
5528 /* Establish the type offset that can be used to lookup the type. */
5529 sig_type
->type_offset_in_section
.sect_off
=
5530 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5534 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5538 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5539 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5543 /* Skip dummy compilation units. */
5544 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5545 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5547 do_cleanups (cleanups
);
5551 /* If we don't have them yet, read the abbrevs for this compilation unit.
5552 And if we need to read them now, make sure they're freed when we're
5553 done. Note that it's important that if the CU had an abbrev table
5554 on entry we don't free it when we're done: Somewhere up the call stack
5555 it may be in use. */
5556 if (abbrev_table
!= NULL
)
5558 gdb_assert (cu
->abbrev_table
== NULL
);
5559 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5560 == abbrev_table
->offset
.sect_off
);
5561 cu
->abbrev_table
= abbrev_table
;
5563 else if (cu
->abbrev_table
== NULL
)
5565 dwarf2_read_abbrevs (cu
, abbrev_section
);
5566 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5568 else if (rereading_dwo_cu
)
5570 dwarf2_free_abbrev_table (cu
);
5571 dwarf2_read_abbrevs (cu
, abbrev_section
);
5574 /* Read the top level CU/TU die. */
5575 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5576 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5578 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5580 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5581 DWO CU, that this test will fail (the attribute will not be present). */
5582 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5585 struct dwo_unit
*dwo_unit
;
5586 struct die_info
*dwo_comp_unit_die
;
5590 complaint (&symfile_complaints
,
5591 _("compilation unit with DW_AT_GNU_dwo_name"
5592 " has children (offset 0x%x) [in module %s]"),
5593 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5595 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5596 if (dwo_unit
!= NULL
)
5598 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5599 abbrev_table
!= NULL
,
5600 comp_unit_die
, NULL
,
5602 &dwo_comp_unit_die
, &has_children
) == 0)
5605 do_cleanups (cleanups
);
5608 comp_unit_die
= dwo_comp_unit_die
;
5612 /* Yikes, we couldn't find the rest of the DIE, we only have
5613 the stub. A complaint has already been logged. There's
5614 not much more we can do except pass on the stub DIE to
5615 die_reader_func. We don't want to throw an error on bad
5620 /* All of the above is setup for this call. Yikes. */
5621 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5623 /* Done, clean up. */
5624 if (free_cu_cleanup
!= NULL
)
5628 /* We've successfully allocated this compilation unit. Let our
5629 caller clean it up when finished with it. */
5630 discard_cleanups (free_cu_cleanup
);
5632 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5633 So we have to manually free the abbrev table. */
5634 dwarf2_free_abbrev_table (cu
);
5636 /* Link this CU into read_in_chain. */
5637 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5638 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5641 do_cleanups (free_cu_cleanup
);
5644 do_cleanups (cleanups
);
5647 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5648 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5649 to have already done the lookup to find the DWO file).
5651 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5652 THIS_CU->is_debug_types, but nothing else.
5654 We fill in THIS_CU->length.
5656 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5657 linker) then DIE_READER_FUNC will not get called.
5659 THIS_CU->cu is always freed when done.
5660 This is done in order to not leave THIS_CU->cu in a state where we have
5661 to care whether it refers to the "main" CU or the DWO CU. */
5664 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5665 struct dwo_file
*dwo_file
,
5666 die_reader_func_ftype
*die_reader_func
,
5669 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5670 struct dwarf2_section_info
*section
= this_cu
->section
;
5671 bfd
*abfd
= get_section_bfd_owner (section
);
5672 struct dwarf2_section_info
*abbrev_section
;
5673 struct dwarf2_cu cu
;
5674 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5675 struct die_reader_specs reader
;
5676 struct cleanup
*cleanups
;
5677 struct die_info
*comp_unit_die
;
5680 if (dwarf_die_debug
)
5681 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5682 this_cu
->is_debug_types
? "type" : "comp",
5683 this_cu
->offset
.sect_off
);
5685 gdb_assert (this_cu
->cu
== NULL
);
5687 abbrev_section
= (dwo_file
!= NULL
5688 ? &dwo_file
->sections
.abbrev
5689 : get_abbrev_section_for_cu (this_cu
));
5691 /* This is cheap if the section is already read in. */
5692 dwarf2_read_section (objfile
, section
);
5694 init_one_comp_unit (&cu
, this_cu
);
5696 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5698 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5699 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5700 abbrev_section
, info_ptr
,
5701 this_cu
->is_debug_types
);
5703 this_cu
->length
= get_cu_length (&cu
.header
);
5705 /* Skip dummy compilation units. */
5706 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5707 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5709 do_cleanups (cleanups
);
5713 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5714 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5716 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5717 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5719 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5721 do_cleanups (cleanups
);
5724 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5725 does not lookup the specified DWO file.
5726 This cannot be used to read DWO files.
5728 THIS_CU->cu is always freed when done.
5729 This is done in order to not leave THIS_CU->cu in a state where we have
5730 to care whether it refers to the "main" CU or the DWO CU.
5731 We can revisit this if the data shows there's a performance issue. */
5734 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5735 die_reader_func_ftype
*die_reader_func
,
5738 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5741 /* Type Unit Groups.
5743 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5744 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5745 so that all types coming from the same compilation (.o file) are grouped
5746 together. A future step could be to put the types in the same symtab as
5747 the CU the types ultimately came from. */
5750 hash_type_unit_group (const void *item
)
5752 const struct type_unit_group
*tu_group
5753 = (const struct type_unit_group
*) item
;
5755 return hash_stmt_list_entry (&tu_group
->hash
);
5759 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5761 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
5762 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
5764 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5767 /* Allocate a hash table for type unit groups. */
5770 allocate_type_unit_groups_table (void)
5772 return htab_create_alloc_ex (3,
5773 hash_type_unit_group
,
5776 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5777 hashtab_obstack_allocate
,
5778 dummy_obstack_deallocate
);
5781 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5782 partial symtabs. We combine several TUs per psymtab to not let the size
5783 of any one psymtab grow too big. */
5784 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5785 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5787 /* Helper routine for get_type_unit_group.
5788 Create the type_unit_group object used to hold one or more TUs. */
5790 static struct type_unit_group
*
5791 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5793 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5794 struct dwarf2_per_cu_data
*per_cu
;
5795 struct type_unit_group
*tu_group
;
5797 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5798 struct type_unit_group
);
5799 per_cu
= &tu_group
->per_cu
;
5800 per_cu
->objfile
= objfile
;
5802 if (dwarf2_per_objfile
->using_index
)
5804 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5805 struct dwarf2_per_cu_quick_data
);
5809 unsigned int line_offset
= line_offset_struct
.sect_off
;
5810 struct partial_symtab
*pst
;
5813 /* Give the symtab a useful name for debug purposes. */
5814 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5815 name
= xstrprintf ("<type_units_%d>",
5816 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5818 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5820 pst
= create_partial_symtab (per_cu
, name
);
5826 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5827 tu_group
->hash
.line_offset
= line_offset_struct
;
5832 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5833 STMT_LIST is a DW_AT_stmt_list attribute. */
5835 static struct type_unit_group
*
5836 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5838 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5839 struct type_unit_group
*tu_group
;
5841 unsigned int line_offset
;
5842 struct type_unit_group type_unit_group_for_lookup
;
5844 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5846 dwarf2_per_objfile
->type_unit_groups
=
5847 allocate_type_unit_groups_table ();
5850 /* Do we need to create a new group, or can we use an existing one? */
5854 line_offset
= DW_UNSND (stmt_list
);
5855 ++tu_stats
->nr_symtab_sharers
;
5859 /* Ugh, no stmt_list. Rare, but we have to handle it.
5860 We can do various things here like create one group per TU or
5861 spread them over multiple groups to split up the expansion work.
5862 To avoid worst case scenarios (too many groups or too large groups)
5863 we, umm, group them in bunches. */
5864 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5865 | (tu_stats
->nr_stmt_less_type_units
5866 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5867 ++tu_stats
->nr_stmt_less_type_units
;
5870 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5871 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5872 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5873 &type_unit_group_for_lookup
, INSERT
);
5876 tu_group
= (struct type_unit_group
*) *slot
;
5877 gdb_assert (tu_group
!= NULL
);
5881 sect_offset line_offset_struct
;
5883 line_offset_struct
.sect_off
= line_offset
;
5884 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5886 ++tu_stats
->nr_symtabs
;
5892 /* Partial symbol tables. */
5894 /* Create a psymtab named NAME and assign it to PER_CU.
5896 The caller must fill in the following details:
5897 dirname, textlow, texthigh. */
5899 static struct partial_symtab
*
5900 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5902 struct objfile
*objfile
= per_cu
->objfile
;
5903 struct partial_symtab
*pst
;
5905 pst
= start_psymtab_common (objfile
, name
, 0,
5906 objfile
->global_psymbols
.next
,
5907 objfile
->static_psymbols
.next
);
5909 pst
->psymtabs_addrmap_supported
= 1;
5911 /* This is the glue that links PST into GDB's symbol API. */
5912 pst
->read_symtab_private
= per_cu
;
5913 pst
->read_symtab
= dwarf2_read_symtab
;
5914 per_cu
->v
.psymtab
= pst
;
5919 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5922 struct process_psymtab_comp_unit_data
5924 /* True if we are reading a DW_TAG_partial_unit. */
5926 int want_partial_unit
;
5928 /* The "pretend" language that is used if the CU doesn't declare a
5931 enum language pretend_language
;
5934 /* die_reader_func for process_psymtab_comp_unit. */
5937 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5938 const gdb_byte
*info_ptr
,
5939 struct die_info
*comp_unit_die
,
5943 struct dwarf2_cu
*cu
= reader
->cu
;
5944 struct objfile
*objfile
= cu
->objfile
;
5945 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5946 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5948 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5949 struct partial_symtab
*pst
;
5951 const char *filename
;
5952 struct process_psymtab_comp_unit_data
*info
5953 = (struct process_psymtab_comp_unit_data
*) data
;
5955 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5958 gdb_assert (! per_cu
->is_debug_types
);
5960 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5962 cu
->list_in_scope
= &file_symbols
;
5964 /* Allocate a new partial symbol table structure. */
5965 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
5966 if (filename
== NULL
)
5969 pst
= create_partial_symtab (per_cu
, filename
);
5971 /* This must be done before calling dwarf2_build_include_psymtabs. */
5972 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5974 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5976 dwarf2_find_base_address (comp_unit_die
, cu
);
5978 /* Possibly set the default values of LOWPC and HIGHPC from
5980 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5981 &best_highpc
, cu
, pst
);
5982 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5983 /* Store the contiguous range if it is not empty; it can be empty for
5984 CUs with no code. */
5985 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5986 gdbarch_adjust_dwarf2_addr (gdbarch
,
5987 best_lowpc
+ baseaddr
),
5988 gdbarch_adjust_dwarf2_addr (gdbarch
,
5989 best_highpc
+ baseaddr
) - 1,
5992 /* Check if comp unit has_children.
5993 If so, read the rest of the partial symbols from this comp unit.
5994 If not, there's no more debug_info for this comp unit. */
5997 struct partial_die_info
*first_die
;
5998 CORE_ADDR lowpc
, highpc
;
6000 lowpc
= ((CORE_ADDR
) -1);
6001 highpc
= ((CORE_ADDR
) 0);
6003 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6005 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6008 /* If we didn't find a lowpc, set it to highpc to avoid
6009 complaints from `maint check'. */
6010 if (lowpc
== ((CORE_ADDR
) -1))
6013 /* If the compilation unit didn't have an explicit address range,
6014 then use the information extracted from its child dies. */
6018 best_highpc
= highpc
;
6021 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6022 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6024 end_psymtab_common (objfile
, pst
);
6026 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6029 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6030 struct dwarf2_per_cu_data
*iter
;
6032 /* Fill in 'dependencies' here; we fill in 'users' in a
6034 pst
->number_of_dependencies
= len
;
6036 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6038 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6041 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6043 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6046 /* Get the list of files included in the current compilation unit,
6047 and build a psymtab for each of them. */
6048 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6050 if (dwarf_read_debug
)
6052 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6054 fprintf_unfiltered (gdb_stdlog
,
6055 "Psymtab for %s unit @0x%x: %s - %s"
6056 ", %d global, %d static syms\n",
6057 per_cu
->is_debug_types
? "type" : "comp",
6058 per_cu
->offset
.sect_off
,
6059 paddress (gdbarch
, pst
->textlow
),
6060 paddress (gdbarch
, pst
->texthigh
),
6061 pst
->n_global_syms
, pst
->n_static_syms
);
6065 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6066 Process compilation unit THIS_CU for a psymtab. */
6069 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6070 int want_partial_unit
,
6071 enum language pretend_language
)
6073 struct process_psymtab_comp_unit_data info
;
6075 /* If this compilation unit was already read in, free the
6076 cached copy in order to read it in again. This is
6077 necessary because we skipped some symbols when we first
6078 read in the compilation unit (see load_partial_dies).
6079 This problem could be avoided, but the benefit is unclear. */
6080 if (this_cu
->cu
!= NULL
)
6081 free_one_cached_comp_unit (this_cu
);
6083 gdb_assert (! this_cu
->is_debug_types
);
6084 info
.want_partial_unit
= want_partial_unit
;
6085 info
.pretend_language
= pretend_language
;
6086 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6087 process_psymtab_comp_unit_reader
,
6090 /* Age out any secondary CUs. */
6091 age_cached_comp_units ();
6094 /* Reader function for build_type_psymtabs. */
6097 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6098 const gdb_byte
*info_ptr
,
6099 struct die_info
*type_unit_die
,
6103 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6104 struct dwarf2_cu
*cu
= reader
->cu
;
6105 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6106 struct signatured_type
*sig_type
;
6107 struct type_unit_group
*tu_group
;
6108 struct attribute
*attr
;
6109 struct partial_die_info
*first_die
;
6110 CORE_ADDR lowpc
, highpc
;
6111 struct partial_symtab
*pst
;
6113 gdb_assert (data
== NULL
);
6114 gdb_assert (per_cu
->is_debug_types
);
6115 sig_type
= (struct signatured_type
*) per_cu
;
6120 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6121 tu_group
= get_type_unit_group (cu
, attr
);
6123 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6125 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6126 cu
->list_in_scope
= &file_symbols
;
6127 pst
= create_partial_symtab (per_cu
, "");
6130 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6132 lowpc
= (CORE_ADDR
) -1;
6133 highpc
= (CORE_ADDR
) 0;
6134 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6136 end_psymtab_common (objfile
, pst
);
6139 /* Struct used to sort TUs by their abbreviation table offset. */
6141 struct tu_abbrev_offset
6143 struct signatured_type
*sig_type
;
6144 sect_offset abbrev_offset
;
6147 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6150 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6152 const struct tu_abbrev_offset
* const *a
6153 = (const struct tu_abbrev_offset
* const*) ap
;
6154 const struct tu_abbrev_offset
* const *b
6155 = (const struct tu_abbrev_offset
* const*) bp
;
6156 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6157 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6159 return (aoff
> boff
) - (aoff
< boff
);
6162 /* Efficiently read all the type units.
6163 This does the bulk of the work for build_type_psymtabs.
6165 The efficiency is because we sort TUs by the abbrev table they use and
6166 only read each abbrev table once. In one program there are 200K TUs
6167 sharing 8K abbrev tables.
6169 The main purpose of this function is to support building the
6170 dwarf2_per_objfile->type_unit_groups table.
6171 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6172 can collapse the search space by grouping them by stmt_list.
6173 The savings can be significant, in the same program from above the 200K TUs
6174 share 8K stmt_list tables.
6176 FUNC is expected to call get_type_unit_group, which will create the
6177 struct type_unit_group if necessary and add it to
6178 dwarf2_per_objfile->type_unit_groups. */
6181 build_type_psymtabs_1 (void)
6183 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6184 struct cleanup
*cleanups
;
6185 struct abbrev_table
*abbrev_table
;
6186 sect_offset abbrev_offset
;
6187 struct tu_abbrev_offset
*sorted_by_abbrev
;
6190 /* It's up to the caller to not call us multiple times. */
6191 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6193 if (dwarf2_per_objfile
->n_type_units
== 0)
6196 /* TUs typically share abbrev tables, and there can be way more TUs than
6197 abbrev tables. Sort by abbrev table to reduce the number of times we
6198 read each abbrev table in.
6199 Alternatives are to punt or to maintain a cache of abbrev tables.
6200 This is simpler and efficient enough for now.
6202 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6203 symtab to use). Typically TUs with the same abbrev offset have the same
6204 stmt_list value too so in practice this should work well.
6206 The basic algorithm here is:
6208 sort TUs by abbrev table
6209 for each TU with same abbrev table:
6210 read abbrev table if first user
6211 read TU top level DIE
6212 [IWBN if DWO skeletons had DW_AT_stmt_list]
6215 if (dwarf_read_debug
)
6216 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6218 /* Sort in a separate table to maintain the order of all_type_units
6219 for .gdb_index: TU indices directly index all_type_units. */
6220 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6221 dwarf2_per_objfile
->n_type_units
);
6222 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6224 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6226 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6227 sorted_by_abbrev
[i
].abbrev_offset
=
6228 read_abbrev_offset (sig_type
->per_cu
.section
,
6229 sig_type
->per_cu
.offset
);
6231 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6232 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6233 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6235 abbrev_offset
.sect_off
= ~(unsigned) 0;
6236 abbrev_table
= NULL
;
6237 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6239 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6241 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6243 /* Switch to the next abbrev table if necessary. */
6244 if (abbrev_table
== NULL
6245 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6247 if (abbrev_table
!= NULL
)
6249 abbrev_table_free (abbrev_table
);
6250 /* Reset to NULL in case abbrev_table_read_table throws
6251 an error: abbrev_table_free_cleanup will get called. */
6252 abbrev_table
= NULL
;
6254 abbrev_offset
= tu
->abbrev_offset
;
6256 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6258 ++tu_stats
->nr_uniq_abbrev_tables
;
6261 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6262 build_type_psymtabs_reader
, NULL
);
6265 do_cleanups (cleanups
);
6268 /* Print collected type unit statistics. */
6271 print_tu_stats (void)
6273 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6275 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6276 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6277 dwarf2_per_objfile
->n_type_units
);
6278 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6279 tu_stats
->nr_uniq_abbrev_tables
);
6280 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6281 tu_stats
->nr_symtabs
);
6282 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6283 tu_stats
->nr_symtab_sharers
);
6284 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6285 tu_stats
->nr_stmt_less_type_units
);
6286 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6287 tu_stats
->nr_all_type_units_reallocs
);
6290 /* Traversal function for build_type_psymtabs. */
6293 build_type_psymtab_dependencies (void **slot
, void *info
)
6295 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6296 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6297 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6298 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6299 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6300 struct signatured_type
*iter
;
6303 gdb_assert (len
> 0);
6304 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6306 pst
->number_of_dependencies
= len
;
6308 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6310 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6313 gdb_assert (iter
->per_cu
.is_debug_types
);
6314 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6315 iter
->type_unit_group
= tu_group
;
6318 VEC_free (sig_type_ptr
, tu_group
->tus
);
6323 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6324 Build partial symbol tables for the .debug_types comp-units. */
6327 build_type_psymtabs (struct objfile
*objfile
)
6329 if (! create_all_type_units (objfile
))
6332 build_type_psymtabs_1 ();
6335 /* Traversal function for process_skeletonless_type_unit.
6336 Read a TU in a DWO file and build partial symbols for it. */
6339 process_skeletonless_type_unit (void **slot
, void *info
)
6341 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6342 struct objfile
*objfile
= (struct objfile
*) info
;
6343 struct signatured_type find_entry
, *entry
;
6345 /* If this TU doesn't exist in the global table, add it and read it in. */
6347 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6349 dwarf2_per_objfile
->signatured_types
6350 = allocate_signatured_type_table (objfile
);
6353 find_entry
.signature
= dwo_unit
->signature
;
6354 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6356 /* If we've already seen this type there's nothing to do. What's happening
6357 is we're doing our own version of comdat-folding here. */
6361 /* This does the job that create_all_type_units would have done for
6363 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6364 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6367 /* This does the job that build_type_psymtabs_1 would have done. */
6368 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6369 build_type_psymtabs_reader
, NULL
);
6374 /* Traversal function for process_skeletonless_type_units. */
6377 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6379 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6381 if (dwo_file
->tus
!= NULL
)
6383 htab_traverse_noresize (dwo_file
->tus
,
6384 process_skeletonless_type_unit
, info
);
6390 /* Scan all TUs of DWO files, verifying we've processed them.
6391 This is needed in case a TU was emitted without its skeleton.
6392 Note: This can't be done until we know what all the DWO files are. */
6395 process_skeletonless_type_units (struct objfile
*objfile
)
6397 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6398 if (get_dwp_file () == NULL
6399 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6401 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6402 process_dwo_file_for_skeletonless_type_units
,
6407 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6410 psymtabs_addrmap_cleanup (void *o
)
6412 struct objfile
*objfile
= (struct objfile
*) o
;
6414 objfile
->psymtabs_addrmap
= NULL
;
6417 /* Compute the 'user' field for each psymtab in OBJFILE. */
6420 set_partial_user (struct objfile
*objfile
)
6424 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6426 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6427 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6433 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6435 /* Set the 'user' field only if it is not already set. */
6436 if (pst
->dependencies
[j
]->user
== NULL
)
6437 pst
->dependencies
[j
]->user
= pst
;
6442 /* Build the partial symbol table by doing a quick pass through the
6443 .debug_info and .debug_abbrev sections. */
6446 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6448 struct cleanup
*back_to
, *addrmap_cleanup
;
6449 struct obstack temp_obstack
;
6452 if (dwarf_read_debug
)
6454 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6455 objfile_name (objfile
));
6458 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6460 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6462 /* Any cached compilation units will be linked by the per-objfile
6463 read_in_chain. Make sure to free them when we're done. */
6464 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6466 build_type_psymtabs (objfile
);
6468 create_all_comp_units (objfile
);
6470 /* Create a temporary address map on a temporary obstack. We later
6471 copy this to the final obstack. */
6472 obstack_init (&temp_obstack
);
6473 make_cleanup_obstack_free (&temp_obstack
);
6474 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6475 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6477 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6479 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6481 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6484 /* This has to wait until we read the CUs, we need the list of DWOs. */
6485 process_skeletonless_type_units (objfile
);
6487 /* Now that all TUs have been processed we can fill in the dependencies. */
6488 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6490 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6491 build_type_psymtab_dependencies
, NULL
);
6494 if (dwarf_read_debug
)
6497 set_partial_user (objfile
);
6499 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6500 &objfile
->objfile_obstack
);
6501 discard_cleanups (addrmap_cleanup
);
6503 do_cleanups (back_to
);
6505 if (dwarf_read_debug
)
6506 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6507 objfile_name (objfile
));
6510 /* die_reader_func for load_partial_comp_unit. */
6513 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6514 const gdb_byte
*info_ptr
,
6515 struct die_info
*comp_unit_die
,
6519 struct dwarf2_cu
*cu
= reader
->cu
;
6521 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6523 /* Check if comp unit has_children.
6524 If so, read the rest of the partial symbols from this comp unit.
6525 If not, there's no more debug_info for this comp unit. */
6527 load_partial_dies (reader
, info_ptr
, 0);
6530 /* Load the partial DIEs for a secondary CU into memory.
6531 This is also used when rereading a primary CU with load_all_dies. */
6534 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6536 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6537 load_partial_comp_unit_reader
, NULL
);
6541 read_comp_units_from_section (struct objfile
*objfile
,
6542 struct dwarf2_section_info
*section
,
6543 unsigned int is_dwz
,
6546 struct dwarf2_per_cu_data
***all_comp_units
)
6548 const gdb_byte
*info_ptr
;
6549 bfd
*abfd
= get_section_bfd_owner (section
);
6551 if (dwarf_read_debug
)
6552 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6553 get_section_name (section
),
6554 get_section_file_name (section
));
6556 dwarf2_read_section (objfile
, section
);
6558 info_ptr
= section
->buffer
;
6560 while (info_ptr
< section
->buffer
+ section
->size
)
6562 unsigned int length
, initial_length_size
;
6563 struct dwarf2_per_cu_data
*this_cu
;
6566 offset
.sect_off
= info_ptr
- section
->buffer
;
6568 /* Read just enough information to find out where the next
6569 compilation unit is. */
6570 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6572 /* Save the compilation unit for later lookup. */
6573 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6574 memset (this_cu
, 0, sizeof (*this_cu
));
6575 this_cu
->offset
= offset
;
6576 this_cu
->length
= length
+ initial_length_size
;
6577 this_cu
->is_dwz
= is_dwz
;
6578 this_cu
->objfile
= objfile
;
6579 this_cu
->section
= section
;
6581 if (*n_comp_units
== *n_allocated
)
6584 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6585 *all_comp_units
, *n_allocated
);
6587 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6590 info_ptr
= info_ptr
+ this_cu
->length
;
6594 /* Create a list of all compilation units in OBJFILE.
6595 This is only done for -readnow and building partial symtabs. */
6598 create_all_comp_units (struct objfile
*objfile
)
6602 struct dwarf2_per_cu_data
**all_comp_units
;
6603 struct dwz_file
*dwz
;
6607 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6609 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6610 &n_allocated
, &n_comp_units
, &all_comp_units
);
6612 dwz
= dwarf2_get_dwz_file ();
6614 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6615 &n_allocated
, &n_comp_units
,
6618 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6619 struct dwarf2_per_cu_data
*,
6621 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6622 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6623 xfree (all_comp_units
);
6624 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6627 /* Process all loaded DIEs for compilation unit CU, starting at
6628 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6629 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6630 DW_AT_ranges). See the comments of add_partial_subprogram on how
6631 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6634 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6635 CORE_ADDR
*highpc
, int set_addrmap
,
6636 struct dwarf2_cu
*cu
)
6638 struct partial_die_info
*pdi
;
6640 /* Now, march along the PDI's, descending into ones which have
6641 interesting children but skipping the children of the other ones,
6642 until we reach the end of the compilation unit. */
6648 fixup_partial_die (pdi
, cu
);
6650 /* Anonymous namespaces or modules have no name but have interesting
6651 children, so we need to look at them. Ditto for anonymous
6654 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6655 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6656 || pdi
->tag
== DW_TAG_imported_unit
)
6660 case DW_TAG_subprogram
:
6661 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6663 case DW_TAG_constant
:
6664 case DW_TAG_variable
:
6665 case DW_TAG_typedef
:
6666 case DW_TAG_union_type
:
6667 if (!pdi
->is_declaration
)
6669 add_partial_symbol (pdi
, cu
);
6672 case DW_TAG_class_type
:
6673 case DW_TAG_interface_type
:
6674 case DW_TAG_structure_type
:
6675 if (!pdi
->is_declaration
)
6677 add_partial_symbol (pdi
, cu
);
6680 case DW_TAG_enumeration_type
:
6681 if (!pdi
->is_declaration
)
6682 add_partial_enumeration (pdi
, cu
);
6684 case DW_TAG_base_type
:
6685 case DW_TAG_subrange_type
:
6686 /* File scope base type definitions are added to the partial
6688 add_partial_symbol (pdi
, cu
);
6690 case DW_TAG_namespace
:
6691 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6694 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6696 case DW_TAG_imported_unit
:
6698 struct dwarf2_per_cu_data
*per_cu
;
6700 /* For now we don't handle imported units in type units. */
6701 if (cu
->per_cu
->is_debug_types
)
6703 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6704 " supported in type units [in module %s]"),
6705 objfile_name (cu
->objfile
));
6708 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6712 /* Go read the partial unit, if needed. */
6713 if (per_cu
->v
.psymtab
== NULL
)
6714 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6716 VEC_safe_push (dwarf2_per_cu_ptr
,
6717 cu
->per_cu
->imported_symtabs
, per_cu
);
6720 case DW_TAG_imported_declaration
:
6721 add_partial_symbol (pdi
, cu
);
6728 /* If the die has a sibling, skip to the sibling. */
6730 pdi
= pdi
->die_sibling
;
6734 /* Functions used to compute the fully scoped name of a partial DIE.
6736 Normally, this is simple. For C++, the parent DIE's fully scoped
6737 name is concatenated with "::" and the partial DIE's name. For
6738 Java, the same thing occurs except that "." is used instead of "::".
6739 Enumerators are an exception; they use the scope of their parent
6740 enumeration type, i.e. the name of the enumeration type is not
6741 prepended to the enumerator.
6743 There are two complexities. One is DW_AT_specification; in this
6744 case "parent" means the parent of the target of the specification,
6745 instead of the direct parent of the DIE. The other is compilers
6746 which do not emit DW_TAG_namespace; in this case we try to guess
6747 the fully qualified name of structure types from their members'
6748 linkage names. This must be done using the DIE's children rather
6749 than the children of any DW_AT_specification target. We only need
6750 to do this for structures at the top level, i.e. if the target of
6751 any DW_AT_specification (if any; otherwise the DIE itself) does not
6754 /* Compute the scope prefix associated with PDI's parent, in
6755 compilation unit CU. The result will be allocated on CU's
6756 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6757 field. NULL is returned if no prefix is necessary. */
6759 partial_die_parent_scope (struct partial_die_info
*pdi
,
6760 struct dwarf2_cu
*cu
)
6762 const char *grandparent_scope
;
6763 struct partial_die_info
*parent
, *real_pdi
;
6765 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6766 then this means the parent of the specification DIE. */
6769 while (real_pdi
->has_specification
)
6770 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6771 real_pdi
->spec_is_dwz
, cu
);
6773 parent
= real_pdi
->die_parent
;
6777 if (parent
->scope_set
)
6778 return parent
->scope
;
6780 fixup_partial_die (parent
, cu
);
6782 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6784 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6785 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6786 Work around this problem here. */
6787 if (cu
->language
== language_cplus
6788 && parent
->tag
== DW_TAG_namespace
6789 && strcmp (parent
->name
, "::") == 0
6790 && grandparent_scope
== NULL
)
6792 parent
->scope
= NULL
;
6793 parent
->scope_set
= 1;
6797 if (pdi
->tag
== DW_TAG_enumerator
)
6798 /* Enumerators should not get the name of the enumeration as a prefix. */
6799 parent
->scope
= grandparent_scope
;
6800 else if (parent
->tag
== DW_TAG_namespace
6801 || parent
->tag
== DW_TAG_module
6802 || parent
->tag
== DW_TAG_structure_type
6803 || parent
->tag
== DW_TAG_class_type
6804 || parent
->tag
== DW_TAG_interface_type
6805 || parent
->tag
== DW_TAG_union_type
6806 || parent
->tag
== DW_TAG_enumeration_type
)
6808 if (grandparent_scope
== NULL
)
6809 parent
->scope
= parent
->name
;
6811 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6813 parent
->name
, 0, cu
);
6817 /* FIXME drow/2004-04-01: What should we be doing with
6818 function-local names? For partial symbols, we should probably be
6820 complaint (&symfile_complaints
,
6821 _("unhandled containing DIE tag %d for DIE at %d"),
6822 parent
->tag
, pdi
->offset
.sect_off
);
6823 parent
->scope
= grandparent_scope
;
6826 parent
->scope_set
= 1;
6827 return parent
->scope
;
6830 /* Return the fully scoped name associated with PDI, from compilation unit
6831 CU. The result will be allocated with malloc. */
6834 partial_die_full_name (struct partial_die_info
*pdi
,
6835 struct dwarf2_cu
*cu
)
6837 const char *parent_scope
;
6839 /* If this is a template instantiation, we can not work out the
6840 template arguments from partial DIEs. So, unfortunately, we have
6841 to go through the full DIEs. At least any work we do building
6842 types here will be reused if full symbols are loaded later. */
6843 if (pdi
->has_template_arguments
)
6845 fixup_partial_die (pdi
, cu
);
6847 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6849 struct die_info
*die
;
6850 struct attribute attr
;
6851 struct dwarf2_cu
*ref_cu
= cu
;
6853 /* DW_FORM_ref_addr is using section offset. */
6854 attr
.name
= (enum dwarf_attribute
) 0;
6855 attr
.form
= DW_FORM_ref_addr
;
6856 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6857 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6859 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6863 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6864 if (parent_scope
== NULL
)
6867 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6871 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6873 struct objfile
*objfile
= cu
->objfile
;
6874 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6876 const char *actual_name
= NULL
;
6878 char *built_actual_name
;
6880 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6882 built_actual_name
= partial_die_full_name (pdi
, cu
);
6883 if (built_actual_name
!= NULL
)
6884 actual_name
= built_actual_name
;
6886 if (actual_name
== NULL
)
6887 actual_name
= pdi
->name
;
6891 case DW_TAG_subprogram
:
6892 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6893 if (pdi
->is_external
|| cu
->language
== language_ada
)
6895 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6896 of the global scope. But in Ada, we want to be able to access
6897 nested procedures globally. So all Ada subprograms are stored
6898 in the global scope. */
6899 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6900 built_actual_name
!= NULL
,
6901 VAR_DOMAIN
, LOC_BLOCK
,
6902 &objfile
->global_psymbols
,
6903 addr
, cu
->language
, objfile
);
6907 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6908 built_actual_name
!= NULL
,
6909 VAR_DOMAIN
, LOC_BLOCK
,
6910 &objfile
->static_psymbols
,
6911 addr
, cu
->language
, objfile
);
6914 case DW_TAG_constant
:
6916 struct psymbol_allocation_list
*list
;
6918 if (pdi
->is_external
)
6919 list
= &objfile
->global_psymbols
;
6921 list
= &objfile
->static_psymbols
;
6922 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6923 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6924 list
, 0, cu
->language
, objfile
);
6927 case DW_TAG_variable
:
6929 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6933 && !dwarf2_per_objfile
->has_section_at_zero
)
6935 /* A global or static variable may also have been stripped
6936 out by the linker if unused, in which case its address
6937 will be nullified; do not add such variables into partial
6938 symbol table then. */
6940 else if (pdi
->is_external
)
6943 Don't enter into the minimal symbol tables as there is
6944 a minimal symbol table entry from the ELF symbols already.
6945 Enter into partial symbol table if it has a location
6946 descriptor or a type.
6947 If the location descriptor is missing, new_symbol will create
6948 a LOC_UNRESOLVED symbol, the address of the variable will then
6949 be determined from the minimal symbol table whenever the variable
6951 The address for the partial symbol table entry is not
6952 used by GDB, but it comes in handy for debugging partial symbol
6955 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6956 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6957 built_actual_name
!= NULL
,
6958 VAR_DOMAIN
, LOC_STATIC
,
6959 &objfile
->global_psymbols
,
6961 cu
->language
, objfile
);
6965 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6967 /* Static Variable. Skip symbols whose value we cannot know (those
6968 without location descriptors or constant values). */
6969 if (!has_loc
&& !pdi
->has_const_value
)
6971 xfree (built_actual_name
);
6975 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6976 built_actual_name
!= NULL
,
6977 VAR_DOMAIN
, LOC_STATIC
,
6978 &objfile
->static_psymbols
,
6979 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6980 cu
->language
, objfile
);
6983 case DW_TAG_typedef
:
6984 case DW_TAG_base_type
:
6985 case DW_TAG_subrange_type
:
6986 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6987 built_actual_name
!= NULL
,
6988 VAR_DOMAIN
, LOC_TYPEDEF
,
6989 &objfile
->static_psymbols
,
6990 0, cu
->language
, objfile
);
6992 case DW_TAG_imported_declaration
:
6993 case DW_TAG_namespace
:
6994 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6995 built_actual_name
!= NULL
,
6996 VAR_DOMAIN
, LOC_TYPEDEF
,
6997 &objfile
->global_psymbols
,
6998 0, cu
->language
, objfile
);
7001 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7002 built_actual_name
!= NULL
,
7003 MODULE_DOMAIN
, LOC_TYPEDEF
,
7004 &objfile
->global_psymbols
,
7005 0, cu
->language
, objfile
);
7007 case DW_TAG_class_type
:
7008 case DW_TAG_interface_type
:
7009 case DW_TAG_structure_type
:
7010 case DW_TAG_union_type
:
7011 case DW_TAG_enumeration_type
:
7012 /* Skip external references. The DWARF standard says in the section
7013 about "Structure, Union, and Class Type Entries": "An incomplete
7014 structure, union or class type is represented by a structure,
7015 union or class entry that does not have a byte size attribute
7016 and that has a DW_AT_declaration attribute." */
7017 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7019 xfree (built_actual_name
);
7023 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7024 static vs. global. */
7025 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7026 built_actual_name
!= NULL
,
7027 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7028 (cu
->language
== language_cplus
7029 || cu
->language
== language_java
)
7030 ? &objfile
->global_psymbols
7031 : &objfile
->static_psymbols
,
7032 0, cu
->language
, objfile
);
7035 case DW_TAG_enumerator
:
7036 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7037 built_actual_name
!= NULL
,
7038 VAR_DOMAIN
, LOC_CONST
,
7039 (cu
->language
== language_cplus
7040 || cu
->language
== language_java
)
7041 ? &objfile
->global_psymbols
7042 : &objfile
->static_psymbols
,
7043 0, cu
->language
, objfile
);
7049 xfree (built_actual_name
);
7052 /* Read a partial die corresponding to a namespace; also, add a symbol
7053 corresponding to that namespace to the symbol table. NAMESPACE is
7054 the name of the enclosing namespace. */
7057 add_partial_namespace (struct partial_die_info
*pdi
,
7058 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7059 int set_addrmap
, struct dwarf2_cu
*cu
)
7061 /* Add a symbol for the namespace. */
7063 add_partial_symbol (pdi
, cu
);
7065 /* Now scan partial symbols in that namespace. */
7067 if (pdi
->has_children
)
7068 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7071 /* Read a partial die corresponding to a Fortran module. */
7074 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7075 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7077 /* Add a symbol for the namespace. */
7079 add_partial_symbol (pdi
, cu
);
7081 /* Now scan partial symbols in that module. */
7083 if (pdi
->has_children
)
7084 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7087 /* Read a partial die corresponding to a subprogram and create a partial
7088 symbol for that subprogram. When the CU language allows it, this
7089 routine also defines a partial symbol for each nested subprogram
7090 that this subprogram contains. If SET_ADDRMAP is true, record the
7091 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7092 and highest PC values found in PDI.
7094 PDI may also be a lexical block, in which case we simply search
7095 recursively for subprograms defined inside that lexical block.
7096 Again, this is only performed when the CU language allows this
7097 type of definitions. */
7100 add_partial_subprogram (struct partial_die_info
*pdi
,
7101 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7102 int set_addrmap
, struct dwarf2_cu
*cu
)
7104 if (pdi
->tag
== DW_TAG_subprogram
)
7106 if (pdi
->has_pc_info
)
7108 if (pdi
->lowpc
< *lowpc
)
7109 *lowpc
= pdi
->lowpc
;
7110 if (pdi
->highpc
> *highpc
)
7111 *highpc
= pdi
->highpc
;
7114 struct objfile
*objfile
= cu
->objfile
;
7115 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7120 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7121 SECT_OFF_TEXT (objfile
));
7122 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7123 pdi
->lowpc
+ baseaddr
);
7124 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7125 pdi
->highpc
+ baseaddr
);
7126 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7127 cu
->per_cu
->v
.psymtab
);
7131 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7133 if (!pdi
->is_declaration
)
7134 /* Ignore subprogram DIEs that do not have a name, they are
7135 illegal. Do not emit a complaint at this point, we will
7136 do so when we convert this psymtab into a symtab. */
7138 add_partial_symbol (pdi
, cu
);
7142 if (! pdi
->has_children
)
7145 if (cu
->language
== language_ada
)
7147 pdi
= pdi
->die_child
;
7150 fixup_partial_die (pdi
, cu
);
7151 if (pdi
->tag
== DW_TAG_subprogram
7152 || pdi
->tag
== DW_TAG_lexical_block
)
7153 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7154 pdi
= pdi
->die_sibling
;
7159 /* Read a partial die corresponding to an enumeration type. */
7162 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7163 struct dwarf2_cu
*cu
)
7165 struct partial_die_info
*pdi
;
7167 if (enum_pdi
->name
!= NULL
)
7168 add_partial_symbol (enum_pdi
, cu
);
7170 pdi
= enum_pdi
->die_child
;
7173 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7174 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7176 add_partial_symbol (pdi
, cu
);
7177 pdi
= pdi
->die_sibling
;
7181 /* Return the initial uleb128 in the die at INFO_PTR. */
7184 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7186 unsigned int bytes_read
;
7188 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7191 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7192 Return the corresponding abbrev, or NULL if the number is zero (indicating
7193 an empty DIE). In either case *BYTES_READ will be set to the length of
7194 the initial number. */
7196 static struct abbrev_info
*
7197 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7198 struct dwarf2_cu
*cu
)
7200 bfd
*abfd
= cu
->objfile
->obfd
;
7201 unsigned int abbrev_number
;
7202 struct abbrev_info
*abbrev
;
7204 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7206 if (abbrev_number
== 0)
7209 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7212 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7213 " at offset 0x%x [in module %s]"),
7214 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7215 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7221 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7222 Returns a pointer to the end of a series of DIEs, terminated by an empty
7223 DIE. Any children of the skipped DIEs will also be skipped. */
7225 static const gdb_byte
*
7226 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7228 struct dwarf2_cu
*cu
= reader
->cu
;
7229 struct abbrev_info
*abbrev
;
7230 unsigned int bytes_read
;
7234 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7236 return info_ptr
+ bytes_read
;
7238 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7242 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7243 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7244 abbrev corresponding to that skipped uleb128 should be passed in
7245 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7248 static const gdb_byte
*
7249 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7250 struct abbrev_info
*abbrev
)
7252 unsigned int bytes_read
;
7253 struct attribute attr
;
7254 bfd
*abfd
= reader
->abfd
;
7255 struct dwarf2_cu
*cu
= reader
->cu
;
7256 const gdb_byte
*buffer
= reader
->buffer
;
7257 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7258 unsigned int form
, i
;
7260 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7262 /* The only abbrev we care about is DW_AT_sibling. */
7263 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7265 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7266 if (attr
.form
== DW_FORM_ref_addr
)
7267 complaint (&symfile_complaints
,
7268 _("ignoring absolute DW_AT_sibling"));
7271 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7272 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7274 if (sibling_ptr
< info_ptr
)
7275 complaint (&symfile_complaints
,
7276 _("DW_AT_sibling points backwards"));
7277 else if (sibling_ptr
> reader
->buffer_end
)
7278 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7284 /* If it isn't DW_AT_sibling, skip this attribute. */
7285 form
= abbrev
->attrs
[i
].form
;
7289 case DW_FORM_ref_addr
:
7290 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7291 and later it is offset sized. */
7292 if (cu
->header
.version
== 2)
7293 info_ptr
+= cu
->header
.addr_size
;
7295 info_ptr
+= cu
->header
.offset_size
;
7297 case DW_FORM_GNU_ref_alt
:
7298 info_ptr
+= cu
->header
.offset_size
;
7301 info_ptr
+= cu
->header
.addr_size
;
7308 case DW_FORM_flag_present
:
7320 case DW_FORM_ref_sig8
:
7323 case DW_FORM_string
:
7324 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7325 info_ptr
+= bytes_read
;
7327 case DW_FORM_sec_offset
:
7329 case DW_FORM_GNU_strp_alt
:
7330 info_ptr
+= cu
->header
.offset_size
;
7332 case DW_FORM_exprloc
:
7334 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7335 info_ptr
+= bytes_read
;
7337 case DW_FORM_block1
:
7338 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7340 case DW_FORM_block2
:
7341 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7343 case DW_FORM_block4
:
7344 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7348 case DW_FORM_ref_udata
:
7349 case DW_FORM_GNU_addr_index
:
7350 case DW_FORM_GNU_str_index
:
7351 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7353 case DW_FORM_indirect
:
7354 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7355 info_ptr
+= bytes_read
;
7356 /* We need to continue parsing from here, so just go back to
7358 goto skip_attribute
;
7361 error (_("Dwarf Error: Cannot handle %s "
7362 "in DWARF reader [in module %s]"),
7363 dwarf_form_name (form
),
7364 bfd_get_filename (abfd
));
7368 if (abbrev
->has_children
)
7369 return skip_children (reader
, info_ptr
);
7374 /* Locate ORIG_PDI's sibling.
7375 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7377 static const gdb_byte
*
7378 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7379 struct partial_die_info
*orig_pdi
,
7380 const gdb_byte
*info_ptr
)
7382 /* Do we know the sibling already? */
7384 if (orig_pdi
->sibling
)
7385 return orig_pdi
->sibling
;
7387 /* Are there any children to deal with? */
7389 if (!orig_pdi
->has_children
)
7392 /* Skip the children the long way. */
7394 return skip_children (reader
, info_ptr
);
7397 /* Expand this partial symbol table into a full symbol table. SELF is
7401 dwarf2_read_symtab (struct partial_symtab
*self
,
7402 struct objfile
*objfile
)
7406 warning (_("bug: psymtab for %s is already read in."),
7413 printf_filtered (_("Reading in symbols for %s..."),
7415 gdb_flush (gdb_stdout
);
7418 /* Restore our global data. */
7420 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7421 dwarf2_objfile_data_key
);
7423 /* If this psymtab is constructed from a debug-only objfile, the
7424 has_section_at_zero flag will not necessarily be correct. We
7425 can get the correct value for this flag by looking at the data
7426 associated with the (presumably stripped) associated objfile. */
7427 if (objfile
->separate_debug_objfile_backlink
)
7429 struct dwarf2_per_objfile
*dpo_backlink
7430 = ((struct dwarf2_per_objfile
*)
7431 objfile_data (objfile
->separate_debug_objfile_backlink
,
7432 dwarf2_objfile_data_key
));
7434 dwarf2_per_objfile
->has_section_at_zero
7435 = dpo_backlink
->has_section_at_zero
;
7438 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7440 psymtab_to_symtab_1 (self
);
7442 /* Finish up the debug error message. */
7444 printf_filtered (_("done.\n"));
7447 process_cu_includes ();
7450 /* Reading in full CUs. */
7452 /* Add PER_CU to the queue. */
7455 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7456 enum language pretend_language
)
7458 struct dwarf2_queue_item
*item
;
7461 item
= XNEW (struct dwarf2_queue_item
);
7462 item
->per_cu
= per_cu
;
7463 item
->pretend_language
= pretend_language
;
7466 if (dwarf2_queue
== NULL
)
7467 dwarf2_queue
= item
;
7469 dwarf2_queue_tail
->next
= item
;
7471 dwarf2_queue_tail
= item
;
7474 /* If PER_CU is not yet queued, add it to the queue.
7475 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7477 The result is non-zero if PER_CU was queued, otherwise the result is zero
7478 meaning either PER_CU is already queued or it is already loaded.
7480 N.B. There is an invariant here that if a CU is queued then it is loaded.
7481 The caller is required to load PER_CU if we return non-zero. */
7484 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7485 struct dwarf2_per_cu_data
*per_cu
,
7486 enum language pretend_language
)
7488 /* We may arrive here during partial symbol reading, if we need full
7489 DIEs to process an unusual case (e.g. template arguments). Do
7490 not queue PER_CU, just tell our caller to load its DIEs. */
7491 if (dwarf2_per_objfile
->reading_partial_symbols
)
7493 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7498 /* Mark the dependence relation so that we don't flush PER_CU
7500 if (dependent_cu
!= NULL
)
7501 dwarf2_add_dependence (dependent_cu
, per_cu
);
7503 /* If it's already on the queue, we have nothing to do. */
7507 /* If the compilation unit is already loaded, just mark it as
7509 if (per_cu
->cu
!= NULL
)
7511 per_cu
->cu
->last_used
= 0;
7515 /* Add it to the queue. */
7516 queue_comp_unit (per_cu
, pretend_language
);
7521 /* Process the queue. */
7524 process_queue (void)
7526 struct dwarf2_queue_item
*item
, *next_item
;
7528 if (dwarf_read_debug
)
7530 fprintf_unfiltered (gdb_stdlog
,
7531 "Expanding one or more symtabs of objfile %s ...\n",
7532 objfile_name (dwarf2_per_objfile
->objfile
));
7535 /* The queue starts out with one item, but following a DIE reference
7536 may load a new CU, adding it to the end of the queue. */
7537 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7539 if ((dwarf2_per_objfile
->using_index
7540 ? !item
->per_cu
->v
.quick
->compunit_symtab
7541 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7542 /* Skip dummy CUs. */
7543 && item
->per_cu
->cu
!= NULL
)
7545 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7546 unsigned int debug_print_threshold
;
7549 if (per_cu
->is_debug_types
)
7551 struct signatured_type
*sig_type
=
7552 (struct signatured_type
*) per_cu
;
7554 sprintf (buf
, "TU %s at offset 0x%x",
7555 hex_string (sig_type
->signature
),
7556 per_cu
->offset
.sect_off
);
7557 /* There can be 100s of TUs.
7558 Only print them in verbose mode. */
7559 debug_print_threshold
= 2;
7563 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7564 debug_print_threshold
= 1;
7567 if (dwarf_read_debug
>= debug_print_threshold
)
7568 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7570 if (per_cu
->is_debug_types
)
7571 process_full_type_unit (per_cu
, item
->pretend_language
);
7573 process_full_comp_unit (per_cu
, item
->pretend_language
);
7575 if (dwarf_read_debug
>= debug_print_threshold
)
7576 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7579 item
->per_cu
->queued
= 0;
7580 next_item
= item
->next
;
7584 dwarf2_queue_tail
= NULL
;
7586 if (dwarf_read_debug
)
7588 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7589 objfile_name (dwarf2_per_objfile
->objfile
));
7593 /* Free all allocated queue entries. This function only releases anything if
7594 an error was thrown; if the queue was processed then it would have been
7595 freed as we went along. */
7598 dwarf2_release_queue (void *dummy
)
7600 struct dwarf2_queue_item
*item
, *last
;
7602 item
= dwarf2_queue
;
7605 /* Anything still marked queued is likely to be in an
7606 inconsistent state, so discard it. */
7607 if (item
->per_cu
->queued
)
7609 if (item
->per_cu
->cu
!= NULL
)
7610 free_one_cached_comp_unit (item
->per_cu
);
7611 item
->per_cu
->queued
= 0;
7619 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7622 /* Read in full symbols for PST, and anything it depends on. */
7625 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7627 struct dwarf2_per_cu_data
*per_cu
;
7633 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7634 if (!pst
->dependencies
[i
]->readin
7635 && pst
->dependencies
[i
]->user
== NULL
)
7637 /* Inform about additional files that need to be read in. */
7640 /* FIXME: i18n: Need to make this a single string. */
7641 fputs_filtered (" ", gdb_stdout
);
7643 fputs_filtered ("and ", gdb_stdout
);
7645 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7646 wrap_here (""); /* Flush output. */
7647 gdb_flush (gdb_stdout
);
7649 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7652 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7656 /* It's an include file, no symbols to read for it.
7657 Everything is in the parent symtab. */
7662 dw2_do_instantiate_symtab (per_cu
);
7665 /* Trivial hash function for die_info: the hash value of a DIE
7666 is its offset in .debug_info for this objfile. */
7669 die_hash (const void *item
)
7671 const struct die_info
*die
= (const struct die_info
*) item
;
7673 return die
->offset
.sect_off
;
7676 /* Trivial comparison function for die_info structures: two DIEs
7677 are equal if they have the same offset. */
7680 die_eq (const void *item_lhs
, const void *item_rhs
)
7682 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7683 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7685 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7688 /* die_reader_func for load_full_comp_unit.
7689 This is identical to read_signatured_type_reader,
7690 but is kept separate for now. */
7693 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7694 const gdb_byte
*info_ptr
,
7695 struct die_info
*comp_unit_die
,
7699 struct dwarf2_cu
*cu
= reader
->cu
;
7700 enum language
*language_ptr
= (enum language
*) data
;
7702 gdb_assert (cu
->die_hash
== NULL
);
7704 htab_create_alloc_ex (cu
->header
.length
/ 12,
7708 &cu
->comp_unit_obstack
,
7709 hashtab_obstack_allocate
,
7710 dummy_obstack_deallocate
);
7713 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7714 &info_ptr
, comp_unit_die
);
7715 cu
->dies
= comp_unit_die
;
7716 /* comp_unit_die is not stored in die_hash, no need. */
7718 /* We try not to read any attributes in this function, because not
7719 all CUs needed for references have been loaded yet, and symbol
7720 table processing isn't initialized. But we have to set the CU language,
7721 or we won't be able to build types correctly.
7722 Similarly, if we do not read the producer, we can not apply
7723 producer-specific interpretation. */
7724 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7727 /* Load the DIEs associated with PER_CU into memory. */
7730 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7731 enum language pretend_language
)
7733 gdb_assert (! this_cu
->is_debug_types
);
7735 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7736 load_full_comp_unit_reader
, &pretend_language
);
7739 /* Add a DIE to the delayed physname list. */
7742 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7743 const char *name
, struct die_info
*die
,
7744 struct dwarf2_cu
*cu
)
7746 struct delayed_method_info mi
;
7748 mi
.fnfield_index
= fnfield_index
;
7752 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7755 /* A cleanup for freeing the delayed method list. */
7758 free_delayed_list (void *ptr
)
7760 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7761 if (cu
->method_list
!= NULL
)
7763 VEC_free (delayed_method_info
, cu
->method_list
);
7764 cu
->method_list
= NULL
;
7768 /* Compute the physnames of any methods on the CU's method list.
7770 The computation of method physnames is delayed in order to avoid the
7771 (bad) condition that one of the method's formal parameters is of an as yet
7775 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7778 struct delayed_method_info
*mi
;
7779 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7781 const char *physname
;
7782 struct fn_fieldlist
*fn_flp
7783 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7784 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7785 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7786 = physname
? physname
: "";
7790 /* Go objects should be embedded in a DW_TAG_module DIE,
7791 and it's not clear if/how imported objects will appear.
7792 To keep Go support simple until that's worked out,
7793 go back through what we've read and create something usable.
7794 We could do this while processing each DIE, and feels kinda cleaner,
7795 but that way is more invasive.
7796 This is to, for example, allow the user to type "p var" or "b main"
7797 without having to specify the package name, and allow lookups
7798 of module.object to work in contexts that use the expression
7802 fixup_go_packaging (struct dwarf2_cu
*cu
)
7804 char *package_name
= NULL
;
7805 struct pending
*list
;
7808 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7810 for (i
= 0; i
< list
->nsyms
; ++i
)
7812 struct symbol
*sym
= list
->symbol
[i
];
7814 if (SYMBOL_LANGUAGE (sym
) == language_go
7815 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7817 char *this_package_name
= go_symbol_package_name (sym
);
7819 if (this_package_name
== NULL
)
7821 if (package_name
== NULL
)
7822 package_name
= this_package_name
;
7825 if (strcmp (package_name
, this_package_name
) != 0)
7826 complaint (&symfile_complaints
,
7827 _("Symtab %s has objects from two different Go packages: %s and %s"),
7828 (symbol_symtab (sym
) != NULL
7829 ? symtab_to_filename_for_display
7830 (symbol_symtab (sym
))
7831 : objfile_name (cu
->objfile
)),
7832 this_package_name
, package_name
);
7833 xfree (this_package_name
);
7839 if (package_name
!= NULL
)
7841 struct objfile
*objfile
= cu
->objfile
;
7842 const char *saved_package_name
7843 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7845 strlen (package_name
));
7846 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7847 saved_package_name
, objfile
);
7850 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7852 sym
= allocate_symbol (objfile
);
7853 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7854 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7855 strlen (saved_package_name
), 0, objfile
);
7856 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7857 e.g., "main" finds the "main" module and not C's main(). */
7858 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7859 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7860 SYMBOL_TYPE (sym
) = type
;
7862 add_symbol_to_list (sym
, &global_symbols
);
7864 xfree (package_name
);
7868 /* Return the symtab for PER_CU. This works properly regardless of
7869 whether we're using the index or psymtabs. */
7871 static struct compunit_symtab
*
7872 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7874 return (dwarf2_per_objfile
->using_index
7875 ? per_cu
->v
.quick
->compunit_symtab
7876 : per_cu
->v
.psymtab
->compunit_symtab
);
7879 /* A helper function for computing the list of all symbol tables
7880 included by PER_CU. */
7883 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7884 htab_t all_children
, htab_t all_type_symtabs
,
7885 struct dwarf2_per_cu_data
*per_cu
,
7886 struct compunit_symtab
*immediate_parent
)
7890 struct compunit_symtab
*cust
;
7891 struct dwarf2_per_cu_data
*iter
;
7893 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7896 /* This inclusion and its children have been processed. */
7901 /* Only add a CU if it has a symbol table. */
7902 cust
= get_compunit_symtab (per_cu
);
7905 /* If this is a type unit only add its symbol table if we haven't
7906 seen it yet (type unit per_cu's can share symtabs). */
7907 if (per_cu
->is_debug_types
)
7909 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7913 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7914 if (cust
->user
== NULL
)
7915 cust
->user
= immediate_parent
;
7920 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7921 if (cust
->user
== NULL
)
7922 cust
->user
= immediate_parent
;
7927 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7930 recursively_compute_inclusions (result
, all_children
,
7931 all_type_symtabs
, iter
, cust
);
7935 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7939 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7941 gdb_assert (! per_cu
->is_debug_types
);
7943 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7946 struct dwarf2_per_cu_data
*per_cu_iter
;
7947 struct compunit_symtab
*compunit_symtab_iter
;
7948 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7949 htab_t all_children
, all_type_symtabs
;
7950 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7952 /* If we don't have a symtab, we can just skip this case. */
7956 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7957 NULL
, xcalloc
, xfree
);
7958 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7959 NULL
, xcalloc
, xfree
);
7962 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7966 recursively_compute_inclusions (&result_symtabs
, all_children
,
7967 all_type_symtabs
, per_cu_iter
,
7971 /* Now we have a transitive closure of all the included symtabs. */
7972 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7974 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7975 struct compunit_symtab
*, len
+ 1);
7977 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7978 compunit_symtab_iter
);
7980 cust
->includes
[ix
] = compunit_symtab_iter
;
7981 cust
->includes
[len
] = NULL
;
7983 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7984 htab_delete (all_children
);
7985 htab_delete (all_type_symtabs
);
7989 /* Compute the 'includes' field for the symtabs of all the CUs we just
7993 process_cu_includes (void)
7996 struct dwarf2_per_cu_data
*iter
;
7999 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8003 if (! iter
->is_debug_types
)
8004 compute_compunit_symtab_includes (iter
);
8007 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8010 /* Generate full symbol information for PER_CU, whose DIEs have
8011 already been loaded into memory. */
8014 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8015 enum language pretend_language
)
8017 struct dwarf2_cu
*cu
= per_cu
->cu
;
8018 struct objfile
*objfile
= per_cu
->objfile
;
8019 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8020 CORE_ADDR lowpc
, highpc
;
8021 struct compunit_symtab
*cust
;
8022 struct cleanup
*back_to
, *delayed_list_cleanup
;
8024 struct block
*static_block
;
8027 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8030 back_to
= make_cleanup (really_free_pendings
, NULL
);
8031 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8033 cu
->list_in_scope
= &file_symbols
;
8035 cu
->language
= pretend_language
;
8036 cu
->language_defn
= language_def (cu
->language
);
8038 /* Do line number decoding in read_file_scope () */
8039 process_die (cu
->dies
, cu
);
8041 /* For now fudge the Go package. */
8042 if (cu
->language
== language_go
)
8043 fixup_go_packaging (cu
);
8045 /* Now that we have processed all the DIEs in the CU, all the types
8046 should be complete, and it should now be safe to compute all of the
8048 compute_delayed_physnames (cu
);
8049 do_cleanups (delayed_list_cleanup
);
8051 /* Some compilers don't define a DW_AT_high_pc attribute for the
8052 compilation unit. If the DW_AT_high_pc is missing, synthesize
8053 it, by scanning the DIE's below the compilation unit. */
8054 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8056 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8057 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8059 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8060 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8061 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8062 addrmap to help ensure it has an accurate map of pc values belonging to
8064 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8066 cust
= end_symtab_from_static_block (static_block
,
8067 SECT_OFF_TEXT (objfile
), 0);
8071 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8073 /* Set symtab language to language from DW_AT_language. If the
8074 compilation is from a C file generated by language preprocessors, do
8075 not set the language if it was already deduced by start_subfile. */
8076 if (!(cu
->language
== language_c
8077 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8078 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8080 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8081 produce DW_AT_location with location lists but it can be possibly
8082 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8083 there were bugs in prologue debug info, fixed later in GCC-4.5
8084 by "unwind info for epilogues" patch (which is not directly related).
8086 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8087 needed, it would be wrong due to missing DW_AT_producer there.
8089 Still one can confuse GDB by using non-standard GCC compilation
8090 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8092 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8093 cust
->locations_valid
= 1;
8095 if (gcc_4_minor
>= 5)
8096 cust
->epilogue_unwind_valid
= 1;
8098 cust
->call_site_htab
= cu
->call_site_htab
;
8101 if (dwarf2_per_objfile
->using_index
)
8102 per_cu
->v
.quick
->compunit_symtab
= cust
;
8105 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8106 pst
->compunit_symtab
= cust
;
8110 /* Push it for inclusion processing later. */
8111 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8113 do_cleanups (back_to
);
8116 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8117 already been loaded into memory. */
8120 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8121 enum language pretend_language
)
8123 struct dwarf2_cu
*cu
= per_cu
->cu
;
8124 struct objfile
*objfile
= per_cu
->objfile
;
8125 struct compunit_symtab
*cust
;
8126 struct cleanup
*back_to
, *delayed_list_cleanup
;
8127 struct signatured_type
*sig_type
;
8129 gdb_assert (per_cu
->is_debug_types
);
8130 sig_type
= (struct signatured_type
*) per_cu
;
8133 back_to
= make_cleanup (really_free_pendings
, NULL
);
8134 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8136 cu
->list_in_scope
= &file_symbols
;
8138 cu
->language
= pretend_language
;
8139 cu
->language_defn
= language_def (cu
->language
);
8141 /* The symbol tables are set up in read_type_unit_scope. */
8142 process_die (cu
->dies
, cu
);
8144 /* For now fudge the Go package. */
8145 if (cu
->language
== language_go
)
8146 fixup_go_packaging (cu
);
8148 /* Now that we have processed all the DIEs in the CU, all the types
8149 should be complete, and it should now be safe to compute all of the
8151 compute_delayed_physnames (cu
);
8152 do_cleanups (delayed_list_cleanup
);
8154 /* TUs share symbol tables.
8155 If this is the first TU to use this symtab, complete the construction
8156 of it with end_expandable_symtab. Otherwise, complete the addition of
8157 this TU's symbols to the existing symtab. */
8158 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8160 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8161 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8165 /* Set symtab language to language from DW_AT_language. If the
8166 compilation is from a C file generated by language preprocessors,
8167 do not set the language if it was already deduced by
8169 if (!(cu
->language
== language_c
8170 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8171 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8176 augment_type_symtab ();
8177 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8180 if (dwarf2_per_objfile
->using_index
)
8181 per_cu
->v
.quick
->compunit_symtab
= cust
;
8184 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8185 pst
->compunit_symtab
= cust
;
8189 do_cleanups (back_to
);
8192 /* Process an imported unit DIE. */
8195 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8197 struct attribute
*attr
;
8199 /* For now we don't handle imported units in type units. */
8200 if (cu
->per_cu
->is_debug_types
)
8202 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8203 " supported in type units [in module %s]"),
8204 objfile_name (cu
->objfile
));
8207 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8210 struct dwarf2_per_cu_data
*per_cu
;
8214 offset
= dwarf2_get_ref_die_offset (attr
);
8215 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8216 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8218 /* If necessary, add it to the queue and load its DIEs. */
8219 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8220 load_full_comp_unit (per_cu
, cu
->language
);
8222 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8227 /* Reset the in_process bit of a die. */
8230 reset_die_in_process (void *arg
)
8232 struct die_info
*die
= (struct die_info
*) arg
;
8234 die
->in_process
= 0;
8237 /* Process a die and its children. */
8240 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8242 struct cleanup
*in_process
;
8244 /* We should only be processing those not already in process. */
8245 gdb_assert (!die
->in_process
);
8247 die
->in_process
= 1;
8248 in_process
= make_cleanup (reset_die_in_process
,die
);
8252 case DW_TAG_padding
:
8254 case DW_TAG_compile_unit
:
8255 case DW_TAG_partial_unit
:
8256 read_file_scope (die
, cu
);
8258 case DW_TAG_type_unit
:
8259 read_type_unit_scope (die
, cu
);
8261 case DW_TAG_subprogram
:
8262 case DW_TAG_inlined_subroutine
:
8263 read_func_scope (die
, cu
);
8265 case DW_TAG_lexical_block
:
8266 case DW_TAG_try_block
:
8267 case DW_TAG_catch_block
:
8268 read_lexical_block_scope (die
, cu
);
8270 case DW_TAG_GNU_call_site
:
8271 read_call_site_scope (die
, cu
);
8273 case DW_TAG_class_type
:
8274 case DW_TAG_interface_type
:
8275 case DW_TAG_structure_type
:
8276 case DW_TAG_union_type
:
8277 process_structure_scope (die
, cu
);
8279 case DW_TAG_enumeration_type
:
8280 process_enumeration_scope (die
, cu
);
8283 /* These dies have a type, but processing them does not create
8284 a symbol or recurse to process the children. Therefore we can
8285 read them on-demand through read_type_die. */
8286 case DW_TAG_subroutine_type
:
8287 case DW_TAG_set_type
:
8288 case DW_TAG_array_type
:
8289 case DW_TAG_pointer_type
:
8290 case DW_TAG_ptr_to_member_type
:
8291 case DW_TAG_reference_type
:
8292 case DW_TAG_string_type
:
8295 case DW_TAG_base_type
:
8296 case DW_TAG_subrange_type
:
8297 case DW_TAG_typedef
:
8298 /* Add a typedef symbol for the type definition, if it has a
8300 new_symbol (die
, read_type_die (die
, cu
), cu
);
8302 case DW_TAG_common_block
:
8303 read_common_block (die
, cu
);
8305 case DW_TAG_common_inclusion
:
8307 case DW_TAG_namespace
:
8308 cu
->processing_has_namespace_info
= 1;
8309 read_namespace (die
, cu
);
8312 cu
->processing_has_namespace_info
= 1;
8313 read_module (die
, cu
);
8315 case DW_TAG_imported_declaration
:
8316 cu
->processing_has_namespace_info
= 1;
8317 if (read_namespace_alias (die
, cu
))
8319 /* The declaration is not a global namespace alias: fall through. */
8320 case DW_TAG_imported_module
:
8321 cu
->processing_has_namespace_info
= 1;
8322 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8323 || cu
->language
!= language_fortran
))
8324 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8325 dwarf_tag_name (die
->tag
));
8326 read_import_statement (die
, cu
);
8329 case DW_TAG_imported_unit
:
8330 process_imported_unit_die (die
, cu
);
8334 new_symbol (die
, NULL
, cu
);
8338 do_cleanups (in_process
);
8341 /* DWARF name computation. */
8343 /* A helper function for dwarf2_compute_name which determines whether DIE
8344 needs to have the name of the scope prepended to the name listed in the
8348 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8350 struct attribute
*attr
;
8354 case DW_TAG_namespace
:
8355 case DW_TAG_typedef
:
8356 case DW_TAG_class_type
:
8357 case DW_TAG_interface_type
:
8358 case DW_TAG_structure_type
:
8359 case DW_TAG_union_type
:
8360 case DW_TAG_enumeration_type
:
8361 case DW_TAG_enumerator
:
8362 case DW_TAG_subprogram
:
8363 case DW_TAG_inlined_subroutine
:
8365 case DW_TAG_imported_declaration
:
8368 case DW_TAG_variable
:
8369 case DW_TAG_constant
:
8370 /* We only need to prefix "globally" visible variables. These include
8371 any variable marked with DW_AT_external or any variable that
8372 lives in a namespace. [Variables in anonymous namespaces
8373 require prefixing, but they are not DW_AT_external.] */
8375 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8377 struct dwarf2_cu
*spec_cu
= cu
;
8379 return die_needs_namespace (die_specification (die
, &spec_cu
),
8383 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8384 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8385 && die
->parent
->tag
!= DW_TAG_module
)
8387 /* A variable in a lexical block of some kind does not need a
8388 namespace, even though in C++ such variables may be external
8389 and have a mangled name. */
8390 if (die
->parent
->tag
== DW_TAG_lexical_block
8391 || die
->parent
->tag
== DW_TAG_try_block
8392 || die
->parent
->tag
== DW_TAG_catch_block
8393 || die
->parent
->tag
== DW_TAG_subprogram
)
8402 /* Retrieve the last character from a mem_file. */
8405 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8407 char *last_char_p
= (char *) object
;
8410 *last_char_p
= buffer
[length
- 1];
8413 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8414 compute the physname for the object, which include a method's:
8415 - formal parameters (C++/Java),
8416 - receiver type (Go),
8417 - return type (Java).
8419 The term "physname" is a bit confusing.
8420 For C++, for example, it is the demangled name.
8421 For Go, for example, it's the mangled name.
8423 For Ada, return the DIE's linkage name rather than the fully qualified
8424 name. PHYSNAME is ignored..
8426 The result is allocated on the objfile_obstack and canonicalized. */
8429 dwarf2_compute_name (const char *name
,
8430 struct die_info
*die
, struct dwarf2_cu
*cu
,
8433 struct objfile
*objfile
= cu
->objfile
;
8436 name
= dwarf2_name (die
, cu
);
8438 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8439 but otherwise compute it by typename_concat inside GDB.
8440 FIXME: Actually this is not really true, or at least not always true.
8441 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8442 Fortran names because there is no mangling standard. So new_symbol_full
8443 will set the demangled name to the result of dwarf2_full_name, and it is
8444 the demangled name that GDB uses if it exists. */
8445 if (cu
->language
== language_ada
8446 || (cu
->language
== language_fortran
&& physname
))
8448 /* For Ada unit, we prefer the linkage name over the name, as
8449 the former contains the exported name, which the user expects
8450 to be able to reference. Ideally, we want the user to be able
8451 to reference this entity using either natural or linkage name,
8452 but we haven't started looking at this enhancement yet. */
8453 const char *linkage_name
;
8455 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8456 if (linkage_name
== NULL
)
8457 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8458 if (linkage_name
!= NULL
)
8459 return linkage_name
;
8462 /* These are the only languages we know how to qualify names in. */
8464 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8465 || cu
->language
== language_fortran
|| cu
->language
== language_d
))
8467 if (die_needs_namespace (die
, cu
))
8471 struct ui_file
*buf
;
8472 char *intermediate_name
;
8473 const char *canonical_name
= NULL
;
8475 prefix
= determine_prefix (die
, cu
);
8476 buf
= mem_fileopen ();
8477 if (*prefix
!= '\0')
8479 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8482 fputs_unfiltered (prefixed_name
, buf
);
8483 xfree (prefixed_name
);
8486 fputs_unfiltered (name
, buf
);
8488 /* Template parameters may be specified in the DIE's DW_AT_name, or
8489 as children with DW_TAG_template_type_param or
8490 DW_TAG_value_type_param. If the latter, add them to the name
8491 here. If the name already has template parameters, then
8492 skip this step; some versions of GCC emit both, and
8493 it is more efficient to use the pre-computed name.
8495 Something to keep in mind about this process: it is very
8496 unlikely, or in some cases downright impossible, to produce
8497 something that will match the mangled name of a function.
8498 If the definition of the function has the same debug info,
8499 we should be able to match up with it anyway. But fallbacks
8500 using the minimal symbol, for instance to find a method
8501 implemented in a stripped copy of libstdc++, will not work.
8502 If we do not have debug info for the definition, we will have to
8503 match them up some other way.
8505 When we do name matching there is a related problem with function
8506 templates; two instantiated function templates are allowed to
8507 differ only by their return types, which we do not add here. */
8509 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8511 struct attribute
*attr
;
8512 struct die_info
*child
;
8515 die
->building_fullname
= 1;
8517 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8521 const gdb_byte
*bytes
;
8522 struct dwarf2_locexpr_baton
*baton
;
8525 if (child
->tag
!= DW_TAG_template_type_param
8526 && child
->tag
!= DW_TAG_template_value_param
)
8531 fputs_unfiltered ("<", buf
);
8535 fputs_unfiltered (", ", buf
);
8537 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8540 complaint (&symfile_complaints
,
8541 _("template parameter missing DW_AT_type"));
8542 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8545 type
= die_type (child
, cu
);
8547 if (child
->tag
== DW_TAG_template_type_param
)
8549 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8553 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8556 complaint (&symfile_complaints
,
8557 _("template parameter missing "
8558 "DW_AT_const_value"));
8559 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8563 dwarf2_const_value_attr (attr
, type
, name
,
8564 &cu
->comp_unit_obstack
, cu
,
8565 &value
, &bytes
, &baton
);
8567 if (TYPE_NOSIGN (type
))
8568 /* GDB prints characters as NUMBER 'CHAR'. If that's
8569 changed, this can use value_print instead. */
8570 c_printchar (value
, type
, buf
);
8573 struct value_print_options opts
;
8576 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8580 else if (bytes
!= NULL
)
8582 v
= allocate_value (type
);
8583 memcpy (value_contents_writeable (v
), bytes
,
8584 TYPE_LENGTH (type
));
8587 v
= value_from_longest (type
, value
);
8589 /* Specify decimal so that we do not depend on
8591 get_formatted_print_options (&opts
, 'd');
8593 value_print (v
, buf
, &opts
);
8599 die
->building_fullname
= 0;
8603 /* Close the argument list, with a space if necessary
8604 (nested templates). */
8605 char last_char
= '\0';
8606 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8607 if (last_char
== '>')
8608 fputs_unfiltered (" >", buf
);
8610 fputs_unfiltered (">", buf
);
8614 /* For Java and C++ methods, append formal parameter type
8615 information, if PHYSNAME. */
8617 if (physname
&& die
->tag
== DW_TAG_subprogram
8618 && (cu
->language
== language_cplus
8619 || cu
->language
== language_java
))
8621 struct type
*type
= read_type_die (die
, cu
);
8623 c_type_print_args (type
, buf
, 1, cu
->language
,
8624 &type_print_raw_options
);
8626 if (cu
->language
== language_java
)
8628 /* For java, we must append the return type to method
8630 if (die
->tag
== DW_TAG_subprogram
)
8631 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8632 0, 0, &type_print_raw_options
);
8634 else if (cu
->language
== language_cplus
)
8636 /* Assume that an artificial first parameter is
8637 "this", but do not crash if it is not. RealView
8638 marks unnamed (and thus unused) parameters as
8639 artificial; there is no way to differentiate
8641 if (TYPE_NFIELDS (type
) > 0
8642 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8643 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8644 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8646 fputs_unfiltered (" const", buf
);
8650 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8651 ui_file_delete (buf
);
8653 if (cu
->language
== language_cplus
)
8655 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8656 &objfile
->per_bfd
->storage_obstack
);
8658 /* If we only computed INTERMEDIATE_NAME, or if
8659 INTERMEDIATE_NAME is already canonical, then we need to
8660 copy it to the appropriate obstack. */
8661 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8662 name
= ((const char *)
8663 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8665 strlen (intermediate_name
)));
8667 name
= canonical_name
;
8669 xfree (intermediate_name
);
8676 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8677 If scope qualifiers are appropriate they will be added. The result
8678 will be allocated on the storage_obstack, or NULL if the DIE does
8679 not have a name. NAME may either be from a previous call to
8680 dwarf2_name or NULL.
8682 The output string will be canonicalized (if C++/Java). */
8685 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8687 return dwarf2_compute_name (name
, die
, cu
, 0);
8690 /* Construct a physname for the given DIE in CU. NAME may either be
8691 from a previous call to dwarf2_name or NULL. The result will be
8692 allocated on the objfile_objstack or NULL if the DIE does not have a
8695 The output string will be canonicalized (if C++/Java). */
8698 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8700 struct objfile
*objfile
= cu
->objfile
;
8701 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8702 struct cleanup
*back_to
;
8705 /* In this case dwarf2_compute_name is just a shortcut not building anything
8707 if (!die_needs_namespace (die
, cu
))
8708 return dwarf2_compute_name (name
, die
, cu
, 1);
8710 back_to
= make_cleanup (null_cleanup
, NULL
);
8712 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8713 if (mangled
== NULL
)
8714 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8716 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8718 if (mangled
!= NULL
)
8722 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8723 type. It is easier for GDB users to search for such functions as
8724 `name(params)' than `long name(params)'. In such case the minimal
8725 symbol names do not match the full symbol names but for template
8726 functions there is never a need to look up their definition from their
8727 declaration so the only disadvantage remains the minimal symbol
8728 variant `long name(params)' does not have the proper inferior type.
8731 if (cu
->language
== language_go
)
8733 /* This is a lie, but we already lie to the caller new_symbol_full.
8734 new_symbol_full assumes we return the mangled name.
8735 This just undoes that lie until things are cleaned up. */
8740 demangled
= gdb_demangle (mangled
,
8741 (DMGL_PARAMS
| DMGL_ANSI
8742 | (cu
->language
== language_java
8743 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8748 make_cleanup (xfree
, demangled
);
8758 if (canon
== NULL
|| check_physname
)
8760 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8762 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8764 /* It may not mean a bug in GDB. The compiler could also
8765 compute DW_AT_linkage_name incorrectly. But in such case
8766 GDB would need to be bug-to-bug compatible. */
8768 complaint (&symfile_complaints
,
8769 _("Computed physname <%s> does not match demangled <%s> "
8770 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8771 physname
, canon
, mangled
, die
->offset
.sect_off
,
8772 objfile_name (objfile
));
8774 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8775 is available here - over computed PHYSNAME. It is safer
8776 against both buggy GDB and buggy compilers. */
8790 retval
= ((const char *)
8791 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8792 retval
, strlen (retval
)));
8794 do_cleanups (back_to
);
8798 /* Inspect DIE in CU for a namespace alias. If one exists, record
8799 a new symbol for it.
8801 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8804 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8806 struct attribute
*attr
;
8808 /* If the die does not have a name, this is not a namespace
8810 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8814 struct die_info
*d
= die
;
8815 struct dwarf2_cu
*imported_cu
= cu
;
8817 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8818 keep inspecting DIEs until we hit the underlying import. */
8819 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8820 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8822 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8826 d
= follow_die_ref (d
, attr
, &imported_cu
);
8827 if (d
->tag
!= DW_TAG_imported_declaration
)
8831 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8833 complaint (&symfile_complaints
,
8834 _("DIE at 0x%x has too many recursively imported "
8835 "declarations"), d
->offset
.sect_off
);
8842 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8844 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8845 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8847 /* This declaration is a global namespace alias. Add
8848 a symbol for it whose type is the aliased namespace. */
8849 new_symbol (die
, type
, cu
);
8858 /* Return the using directives repository (global or local?) to use in the
8859 current context for LANGUAGE.
8861 For Ada, imported declarations can materialize renamings, which *may* be
8862 global. However it is impossible (for now?) in DWARF to distinguish
8863 "external" imported declarations and "static" ones. As all imported
8864 declarations seem to be static in all other languages, make them all CU-wide
8865 global only in Ada. */
8867 static struct using_direct
**
8868 using_directives (enum language language
)
8870 if (language
== language_ada
&& context_stack_depth
== 0)
8871 return &global_using_directives
;
8873 return &local_using_directives
;
8876 /* Read the import statement specified by the given die and record it. */
8879 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8881 struct objfile
*objfile
= cu
->objfile
;
8882 struct attribute
*import_attr
;
8883 struct die_info
*imported_die
, *child_die
;
8884 struct dwarf2_cu
*imported_cu
;
8885 const char *imported_name
;
8886 const char *imported_name_prefix
;
8887 const char *canonical_name
;
8888 const char *import_alias
;
8889 const char *imported_declaration
= NULL
;
8890 const char *import_prefix
;
8891 VEC (const_char_ptr
) *excludes
= NULL
;
8892 struct cleanup
*cleanups
;
8894 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8895 if (import_attr
== NULL
)
8897 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8898 dwarf_tag_name (die
->tag
));
8903 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8904 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8905 if (imported_name
== NULL
)
8907 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8909 The import in the following code:
8923 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8924 <52> DW_AT_decl_file : 1
8925 <53> DW_AT_decl_line : 6
8926 <54> DW_AT_import : <0x75>
8927 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8929 <5b> DW_AT_decl_file : 1
8930 <5c> DW_AT_decl_line : 2
8931 <5d> DW_AT_type : <0x6e>
8933 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8934 <76> DW_AT_byte_size : 4
8935 <77> DW_AT_encoding : 5 (signed)
8937 imports the wrong die ( 0x75 instead of 0x58 ).
8938 This case will be ignored until the gcc bug is fixed. */
8942 /* Figure out the local name after import. */
8943 import_alias
= dwarf2_name (die
, cu
);
8945 /* Figure out where the statement is being imported to. */
8946 import_prefix
= determine_prefix (die
, cu
);
8948 /* Figure out what the scope of the imported die is and prepend it
8949 to the name of the imported die. */
8950 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8952 if (imported_die
->tag
!= DW_TAG_namespace
8953 && imported_die
->tag
!= DW_TAG_module
)
8955 imported_declaration
= imported_name
;
8956 canonical_name
= imported_name_prefix
;
8958 else if (strlen (imported_name_prefix
) > 0)
8959 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8960 imported_name_prefix
,
8961 (cu
->language
== language_d
? "." : "::"),
8962 imported_name
, (char *) NULL
);
8964 canonical_name
= imported_name
;
8966 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8968 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8969 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8970 child_die
= sibling_die (child_die
))
8972 /* DWARF-4: A Fortran use statement with a “rename list” may be
8973 represented by an imported module entry with an import attribute
8974 referring to the module and owned entries corresponding to those
8975 entities that are renamed as part of being imported. */
8977 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8979 complaint (&symfile_complaints
,
8980 _("child DW_TAG_imported_declaration expected "
8981 "- DIE at 0x%x [in module %s]"),
8982 child_die
->offset
.sect_off
, objfile_name (objfile
));
8986 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8987 if (import_attr
== NULL
)
8989 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8990 dwarf_tag_name (child_die
->tag
));
8995 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8997 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8998 if (imported_name
== NULL
)
9000 complaint (&symfile_complaints
,
9001 _("child DW_TAG_imported_declaration has unknown "
9002 "imported name - DIE at 0x%x [in module %s]"),
9003 child_die
->offset
.sect_off
, objfile_name (objfile
));
9007 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9009 process_die (child_die
, cu
);
9012 add_using_directive (using_directives (cu
->language
),
9016 imported_declaration
,
9019 &objfile
->objfile_obstack
);
9021 do_cleanups (cleanups
);
9024 /* Cleanup function for handle_DW_AT_stmt_list. */
9027 free_cu_line_header (void *arg
)
9029 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) arg
;
9031 free_line_header (cu
->line_header
);
9032 cu
->line_header
= NULL
;
9035 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9036 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9037 this, it was first present in GCC release 4.3.0. */
9040 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9042 if (!cu
->checked_producer
)
9043 check_producer (cu
);
9045 return cu
->producer_is_gcc_lt_4_3
;
9049 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9050 const char **name
, const char **comp_dir
)
9052 /* Find the filename. Do not use dwarf2_name here, since the filename
9053 is not a source language identifier. */
9054 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9055 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9057 if (*comp_dir
== NULL
9058 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9059 && IS_ABSOLUTE_PATH (*name
))
9061 char *d
= ldirname (*name
);
9065 make_cleanup (xfree
, d
);
9067 if (*comp_dir
!= NULL
)
9069 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9070 directory, get rid of it. */
9071 const char *cp
= strchr (*comp_dir
, ':');
9073 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9078 *name
= "<unknown>";
9081 /* Handle DW_AT_stmt_list for a compilation unit.
9082 DIE is the DW_TAG_compile_unit die for CU.
9083 COMP_DIR is the compilation directory. LOWPC is passed to
9084 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9087 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9088 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9090 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9091 struct attribute
*attr
;
9092 unsigned int line_offset
;
9093 struct line_header line_header_local
;
9094 hashval_t line_header_local_hash
;
9099 gdb_assert (! cu
->per_cu
->is_debug_types
);
9101 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9105 line_offset
= DW_UNSND (attr
);
9107 /* The line header hash table is only created if needed (it exists to
9108 prevent redundant reading of the line table for partial_units).
9109 If we're given a partial_unit, we'll need it. If we're given a
9110 compile_unit, then use the line header hash table if it's already
9111 created, but don't create one just yet. */
9113 if (dwarf2_per_objfile
->line_header_hash
== NULL
9114 && die
->tag
== DW_TAG_partial_unit
)
9116 dwarf2_per_objfile
->line_header_hash
9117 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9118 line_header_eq_voidp
,
9119 free_line_header_voidp
,
9120 &objfile
->objfile_obstack
,
9121 hashtab_obstack_allocate
,
9122 dummy_obstack_deallocate
);
9125 line_header_local
.offset
.sect_off
= line_offset
;
9126 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9127 line_header_local_hash
= line_header_hash (&line_header_local
);
9128 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9130 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9132 line_header_local_hash
, NO_INSERT
);
9134 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9135 is not present in *SLOT (since if there is something in *SLOT then
9136 it will be for a partial_unit). */
9137 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9139 gdb_assert (*slot
!= NULL
);
9140 cu
->line_header
= (struct line_header
*) *slot
;
9145 /* dwarf_decode_line_header does not yet provide sufficient information.
9146 We always have to call also dwarf_decode_lines for it. */
9147 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9148 if (cu
->line_header
== NULL
)
9151 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9155 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9157 line_header_local_hash
, INSERT
);
9158 gdb_assert (slot
!= NULL
);
9160 if (slot
!= NULL
&& *slot
== NULL
)
9162 /* This newly decoded line number information unit will be owned
9163 by line_header_hash hash table. */
9164 *slot
= cu
->line_header
;
9168 /* We cannot free any current entry in (*slot) as that struct line_header
9169 may be already used by multiple CUs. Create only temporary decoded
9170 line_header for this CU - it may happen at most once for each line
9171 number information unit. And if we're not using line_header_hash
9172 then this is what we want as well. */
9173 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9174 make_cleanup (free_cu_line_header
, cu
);
9176 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9177 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9181 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9184 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9186 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9187 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9188 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9189 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9190 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9191 struct attribute
*attr
;
9192 const char *name
= NULL
;
9193 const char *comp_dir
= NULL
;
9194 struct die_info
*child_die
;
9197 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9199 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9201 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9202 from finish_block. */
9203 if (lowpc
== ((CORE_ADDR
) -1))
9205 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9207 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9209 prepare_one_comp_unit (cu
, die
, cu
->language
);
9211 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9212 standardised yet. As a workaround for the language detection we fall
9213 back to the DW_AT_producer string. */
9214 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9215 cu
->language
= language_opencl
;
9217 /* Similar hack for Go. */
9218 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9219 set_cu_language (DW_LANG_Go
, cu
);
9221 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9223 /* Decode line number information if present. We do this before
9224 processing child DIEs, so that the line header table is available
9225 for DW_AT_decl_file. */
9226 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9228 /* Process all dies in compilation unit. */
9229 if (die
->child
!= NULL
)
9231 child_die
= die
->child
;
9232 while (child_die
&& child_die
->tag
)
9234 process_die (child_die
, cu
);
9235 child_die
= sibling_die (child_die
);
9239 /* Decode macro information, if present. Dwarf 2 macro information
9240 refers to information in the line number info statement program
9241 header, so we can only read it if we've read the header
9243 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9244 if (attr
&& cu
->line_header
)
9246 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9247 complaint (&symfile_complaints
,
9248 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9250 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9254 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9255 if (attr
&& cu
->line_header
)
9257 unsigned int macro_offset
= DW_UNSND (attr
);
9259 dwarf_decode_macros (cu
, macro_offset
, 0);
9263 do_cleanups (back_to
);
9266 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9267 Create the set of symtabs used by this TU, or if this TU is sharing
9268 symtabs with another TU and the symtabs have already been created
9269 then restore those symtabs in the line header.
9270 We don't need the pc/line-number mapping for type units. */
9273 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9275 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9276 struct type_unit_group
*tu_group
;
9278 struct line_header
*lh
;
9279 struct attribute
*attr
;
9280 unsigned int i
, line_offset
;
9281 struct signatured_type
*sig_type
;
9283 gdb_assert (per_cu
->is_debug_types
);
9284 sig_type
= (struct signatured_type
*) per_cu
;
9286 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9288 /* If we're using .gdb_index (includes -readnow) then
9289 per_cu->type_unit_group may not have been set up yet. */
9290 if (sig_type
->type_unit_group
== NULL
)
9291 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9292 tu_group
= sig_type
->type_unit_group
;
9294 /* If we've already processed this stmt_list there's no real need to
9295 do it again, we could fake it and just recreate the part we need
9296 (file name,index -> symtab mapping). If data shows this optimization
9297 is useful we can do it then. */
9298 first_time
= tu_group
->compunit_symtab
== NULL
;
9300 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9305 line_offset
= DW_UNSND (attr
);
9306 lh
= dwarf_decode_line_header (line_offset
, cu
);
9311 dwarf2_start_symtab (cu
, "", NULL
, 0);
9314 gdb_assert (tu_group
->symtabs
== NULL
);
9315 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9320 cu
->line_header
= lh
;
9321 make_cleanup (free_cu_line_header
, cu
);
9325 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9327 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9328 still initializing it, and our caller (a few levels up)
9329 process_full_type_unit still needs to know if this is the first
9332 tu_group
->num_symtabs
= lh
->num_file_names
;
9333 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9335 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9337 const char *dir
= NULL
;
9338 struct file_entry
*fe
= &lh
->file_names
[i
];
9340 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9341 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9342 dwarf2_start_subfile (fe
->name
, dir
);
9344 if (current_subfile
->symtab
== NULL
)
9346 /* NOTE: start_subfile will recognize when it's been passed
9347 a file it has already seen. So we can't assume there's a
9348 simple mapping from lh->file_names to subfiles, plus
9349 lh->file_names may contain dups. */
9350 current_subfile
->symtab
9351 = allocate_symtab (cust
, current_subfile
->name
);
9354 fe
->symtab
= current_subfile
->symtab
;
9355 tu_group
->symtabs
[i
] = fe
->symtab
;
9360 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9362 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9364 struct file_entry
*fe
= &lh
->file_names
[i
];
9366 fe
->symtab
= tu_group
->symtabs
[i
];
9370 /* The main symtab is allocated last. Type units don't have DW_AT_name
9371 so they don't have a "real" (so to speak) symtab anyway.
9372 There is later code that will assign the main symtab to all symbols
9373 that don't have one. We need to handle the case of a symbol with a
9374 missing symtab (DW_AT_decl_file) anyway. */
9377 /* Process DW_TAG_type_unit.
9378 For TUs we want to skip the first top level sibling if it's not the
9379 actual type being defined by this TU. In this case the first top
9380 level sibling is there to provide context only. */
9383 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9385 struct die_info
*child_die
;
9387 prepare_one_comp_unit (cu
, die
, language_minimal
);
9389 /* Initialize (or reinitialize) the machinery for building symtabs.
9390 We do this before processing child DIEs, so that the line header table
9391 is available for DW_AT_decl_file. */
9392 setup_type_unit_groups (die
, cu
);
9394 if (die
->child
!= NULL
)
9396 child_die
= die
->child
;
9397 while (child_die
&& child_die
->tag
)
9399 process_die (child_die
, cu
);
9400 child_die
= sibling_die (child_die
);
9407 http://gcc.gnu.org/wiki/DebugFission
9408 http://gcc.gnu.org/wiki/DebugFissionDWP
9410 To simplify handling of both DWO files ("object" files with the DWARF info)
9411 and DWP files (a file with the DWOs packaged up into one file), we treat
9412 DWP files as having a collection of virtual DWO files. */
9415 hash_dwo_file (const void *item
)
9417 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9420 hash
= htab_hash_string (dwo_file
->dwo_name
);
9421 if (dwo_file
->comp_dir
!= NULL
)
9422 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9427 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9429 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9430 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9432 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9434 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9435 return lhs
->comp_dir
== rhs
->comp_dir
;
9436 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9439 /* Allocate a hash table for DWO files. */
9442 allocate_dwo_file_hash_table (void)
9444 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9446 return htab_create_alloc_ex (41,
9450 &objfile
->objfile_obstack
,
9451 hashtab_obstack_allocate
,
9452 dummy_obstack_deallocate
);
9455 /* Lookup DWO file DWO_NAME. */
9458 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9460 struct dwo_file find_entry
;
9463 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9464 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9466 memset (&find_entry
, 0, sizeof (find_entry
));
9467 find_entry
.dwo_name
= dwo_name
;
9468 find_entry
.comp_dir
= comp_dir
;
9469 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9475 hash_dwo_unit (const void *item
)
9477 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9479 /* This drops the top 32 bits of the id, but is ok for a hash. */
9480 return dwo_unit
->signature
;
9484 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9486 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9487 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9489 /* The signature is assumed to be unique within the DWO file.
9490 So while object file CU dwo_id's always have the value zero,
9491 that's OK, assuming each object file DWO file has only one CU,
9492 and that's the rule for now. */
9493 return lhs
->signature
== rhs
->signature
;
9496 /* Allocate a hash table for DWO CUs,TUs.
9497 There is one of these tables for each of CUs,TUs for each DWO file. */
9500 allocate_dwo_unit_table (struct objfile
*objfile
)
9502 /* Start out with a pretty small number.
9503 Generally DWO files contain only one CU and maybe some TUs. */
9504 return htab_create_alloc_ex (3,
9508 &objfile
->objfile_obstack
,
9509 hashtab_obstack_allocate
,
9510 dummy_obstack_deallocate
);
9513 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9515 struct create_dwo_cu_data
9517 struct dwo_file
*dwo_file
;
9518 struct dwo_unit dwo_unit
;
9521 /* die_reader_func for create_dwo_cu. */
9524 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9525 const gdb_byte
*info_ptr
,
9526 struct die_info
*comp_unit_die
,
9530 struct dwarf2_cu
*cu
= reader
->cu
;
9531 sect_offset offset
= cu
->per_cu
->offset
;
9532 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9533 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9534 struct dwo_file
*dwo_file
= data
->dwo_file
;
9535 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9536 struct attribute
*attr
;
9538 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9541 complaint (&symfile_complaints
,
9542 _("Dwarf Error: debug entry at offset 0x%x is missing"
9543 " its dwo_id [in module %s]"),
9544 offset
.sect_off
, dwo_file
->dwo_name
);
9548 dwo_unit
->dwo_file
= dwo_file
;
9549 dwo_unit
->signature
= DW_UNSND (attr
);
9550 dwo_unit
->section
= section
;
9551 dwo_unit
->offset
= offset
;
9552 dwo_unit
->length
= cu
->per_cu
->length
;
9554 if (dwarf_read_debug
)
9555 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9556 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9559 /* Create the dwo_unit for the lone CU in DWO_FILE.
9560 Note: This function processes DWO files only, not DWP files. */
9562 static struct dwo_unit
*
9563 create_dwo_cu (struct dwo_file
*dwo_file
)
9565 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9566 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9567 const gdb_byte
*info_ptr
, *end_ptr
;
9568 struct create_dwo_cu_data create_dwo_cu_data
;
9569 struct dwo_unit
*dwo_unit
;
9571 dwarf2_read_section (objfile
, section
);
9572 info_ptr
= section
->buffer
;
9574 if (info_ptr
== NULL
)
9577 if (dwarf_read_debug
)
9579 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9580 get_section_name (section
),
9581 get_section_file_name (section
));
9584 create_dwo_cu_data
.dwo_file
= dwo_file
;
9587 end_ptr
= info_ptr
+ section
->size
;
9588 while (info_ptr
< end_ptr
)
9590 struct dwarf2_per_cu_data per_cu
;
9592 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9593 sizeof (create_dwo_cu_data
.dwo_unit
));
9594 memset (&per_cu
, 0, sizeof (per_cu
));
9595 per_cu
.objfile
= objfile
;
9596 per_cu
.is_debug_types
= 0;
9597 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9598 per_cu
.section
= section
;
9600 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9601 create_dwo_cu_reader
,
9602 &create_dwo_cu_data
);
9604 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9606 /* If we've already found one, complain. We only support one
9607 because having more than one requires hacking the dwo_name of
9608 each to match, which is highly unlikely to happen. */
9609 if (dwo_unit
!= NULL
)
9611 complaint (&symfile_complaints
,
9612 _("Multiple CUs in DWO file %s [in module %s]"),
9613 dwo_file
->dwo_name
, objfile_name (objfile
));
9617 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9618 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9621 info_ptr
+= per_cu
.length
;
9627 /* DWP file .debug_{cu,tu}_index section format:
9628 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9632 Both index sections have the same format, and serve to map a 64-bit
9633 signature to a set of section numbers. Each section begins with a header,
9634 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9635 indexes, and a pool of 32-bit section numbers. The index sections will be
9636 aligned at 8-byte boundaries in the file.
9638 The index section header consists of:
9640 V, 32 bit version number
9642 N, 32 bit number of compilation units or type units in the index
9643 M, 32 bit number of slots in the hash table
9645 Numbers are recorded using the byte order of the application binary.
9647 The hash table begins at offset 16 in the section, and consists of an array
9648 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9649 order of the application binary). Unused slots in the hash table are 0.
9650 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9652 The parallel table begins immediately after the hash table
9653 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9654 array of 32-bit indexes (using the byte order of the application binary),
9655 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9656 table contains a 32-bit index into the pool of section numbers. For unused
9657 hash table slots, the corresponding entry in the parallel table will be 0.
9659 The pool of section numbers begins immediately following the hash table
9660 (at offset 16 + 12 * M from the beginning of the section). The pool of
9661 section numbers consists of an array of 32-bit words (using the byte order
9662 of the application binary). Each item in the array is indexed starting
9663 from 0. The hash table entry provides the index of the first section
9664 number in the set. Additional section numbers in the set follow, and the
9665 set is terminated by a 0 entry (section number 0 is not used in ELF).
9667 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9668 section must be the first entry in the set, and the .debug_abbrev.dwo must
9669 be the second entry. Other members of the set may follow in any order.
9675 DWP Version 2 combines all the .debug_info, etc. sections into one,
9676 and the entries in the index tables are now offsets into these sections.
9677 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9680 Index Section Contents:
9682 Hash Table of Signatures dwp_hash_table.hash_table
9683 Parallel Table of Indices dwp_hash_table.unit_table
9684 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9685 Table of Section Sizes dwp_hash_table.v2.sizes
9687 The index section header consists of:
9689 V, 32 bit version number
9690 L, 32 bit number of columns in the table of section offsets
9691 N, 32 bit number of compilation units or type units in the index
9692 M, 32 bit number of slots in the hash table
9694 Numbers are recorded using the byte order of the application binary.
9696 The hash table has the same format as version 1.
9697 The parallel table of indices has the same format as version 1,
9698 except that the entries are origin-1 indices into the table of sections
9699 offsets and the table of section sizes.
9701 The table of offsets begins immediately following the parallel table
9702 (at offset 16 + 12 * M from the beginning of the section). The table is
9703 a two-dimensional array of 32-bit words (using the byte order of the
9704 application binary), with L columns and N+1 rows, in row-major order.
9705 Each row in the array is indexed starting from 0. The first row provides
9706 a key to the remaining rows: each column in this row provides an identifier
9707 for a debug section, and the offsets in the same column of subsequent rows
9708 refer to that section. The section identifiers are:
9710 DW_SECT_INFO 1 .debug_info.dwo
9711 DW_SECT_TYPES 2 .debug_types.dwo
9712 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9713 DW_SECT_LINE 4 .debug_line.dwo
9714 DW_SECT_LOC 5 .debug_loc.dwo
9715 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9716 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9717 DW_SECT_MACRO 8 .debug_macro.dwo
9719 The offsets provided by the CU and TU index sections are the base offsets
9720 for the contributions made by each CU or TU to the corresponding section
9721 in the package file. Each CU and TU header contains an abbrev_offset
9722 field, used to find the abbreviations table for that CU or TU within the
9723 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9724 be interpreted as relative to the base offset given in the index section.
9725 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9726 should be interpreted as relative to the base offset for .debug_line.dwo,
9727 and offsets into other debug sections obtained from DWARF attributes should
9728 also be interpreted as relative to the corresponding base offset.
9730 The table of sizes begins immediately following the table of offsets.
9731 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9732 with L columns and N rows, in row-major order. Each row in the array is
9733 indexed starting from 1 (row 0 is shared by the two tables).
9737 Hash table lookup is handled the same in version 1 and 2:
9739 We assume that N and M will not exceed 2^32 - 1.
9740 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9742 Given a 64-bit compilation unit signature or a type signature S, an entry
9743 in the hash table is located as follows:
9745 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9746 the low-order k bits all set to 1.
9748 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9750 3) If the hash table entry at index H matches the signature, use that
9751 entry. If the hash table entry at index H is unused (all zeroes),
9752 terminate the search: the signature is not present in the table.
9754 4) Let H = (H + H') modulo M. Repeat at Step 3.
9756 Because M > N and H' and M are relatively prime, the search is guaranteed
9757 to stop at an unused slot or find the match. */
9759 /* Create a hash table to map DWO IDs to their CU/TU entry in
9760 .debug_{info,types}.dwo in DWP_FILE.
9761 Returns NULL if there isn't one.
9762 Note: This function processes DWP files only, not DWO files. */
9764 static struct dwp_hash_table
*
9765 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9767 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9768 bfd
*dbfd
= dwp_file
->dbfd
;
9769 const gdb_byte
*index_ptr
, *index_end
;
9770 struct dwarf2_section_info
*index
;
9771 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9772 struct dwp_hash_table
*htab
;
9775 index
= &dwp_file
->sections
.tu_index
;
9777 index
= &dwp_file
->sections
.cu_index
;
9779 if (dwarf2_section_empty_p (index
))
9781 dwarf2_read_section (objfile
, index
);
9783 index_ptr
= index
->buffer
;
9784 index_end
= index_ptr
+ index
->size
;
9786 version
= read_4_bytes (dbfd
, index_ptr
);
9789 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9793 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9795 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9798 if (version
!= 1 && version
!= 2)
9800 error (_("Dwarf Error: unsupported DWP file version (%s)"
9802 pulongest (version
), dwp_file
->name
);
9804 if (nr_slots
!= (nr_slots
& -nr_slots
))
9806 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9807 " is not power of 2 [in module %s]"),
9808 pulongest (nr_slots
), dwp_file
->name
);
9811 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9812 htab
->version
= version
;
9813 htab
->nr_columns
= nr_columns
;
9814 htab
->nr_units
= nr_units
;
9815 htab
->nr_slots
= nr_slots
;
9816 htab
->hash_table
= index_ptr
;
9817 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9819 /* Exit early if the table is empty. */
9820 if (nr_slots
== 0 || nr_units
== 0
9821 || (version
== 2 && nr_columns
== 0))
9823 /* All must be zero. */
9824 if (nr_slots
!= 0 || nr_units
!= 0
9825 || (version
== 2 && nr_columns
!= 0))
9827 complaint (&symfile_complaints
,
9828 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9829 " all zero [in modules %s]"),
9837 htab
->section_pool
.v1
.indices
=
9838 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9839 /* It's harder to decide whether the section is too small in v1.
9840 V1 is deprecated anyway so we punt. */
9844 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9845 int *ids
= htab
->section_pool
.v2
.section_ids
;
9846 /* Reverse map for error checking. */
9847 int ids_seen
[DW_SECT_MAX
+ 1];
9852 error (_("Dwarf Error: bad DWP hash table, too few columns"
9853 " in section table [in module %s]"),
9856 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9858 error (_("Dwarf Error: bad DWP hash table, too many columns"
9859 " in section table [in module %s]"),
9862 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9863 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9864 for (i
= 0; i
< nr_columns
; ++i
)
9866 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9868 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9870 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9871 " in section table [in module %s]"),
9872 id
, dwp_file
->name
);
9874 if (ids_seen
[id
] != -1)
9876 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9877 " id %d in section table [in module %s]"),
9878 id
, dwp_file
->name
);
9883 /* Must have exactly one info or types section. */
9884 if (((ids_seen
[DW_SECT_INFO
] != -1)
9885 + (ids_seen
[DW_SECT_TYPES
] != -1))
9888 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9889 " DWO info/types section [in module %s]"),
9892 /* Must have an abbrev section. */
9893 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9895 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9896 " section [in module %s]"),
9899 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9900 htab
->section_pool
.v2
.sizes
=
9901 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9902 * nr_units
* nr_columns
);
9903 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9904 * nr_units
* nr_columns
))
9907 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9916 /* Update SECTIONS with the data from SECTP.
9918 This function is like the other "locate" section routines that are
9919 passed to bfd_map_over_sections, but in this context the sections to
9920 read comes from the DWP V1 hash table, not the full ELF section table.
9922 The result is non-zero for success, or zero if an error was found. */
9925 locate_v1_virtual_dwo_sections (asection
*sectp
,
9926 struct virtual_v1_dwo_sections
*sections
)
9928 const struct dwop_section_names
*names
= &dwop_section_names
;
9930 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9932 /* There can be only one. */
9933 if (sections
->abbrev
.s
.section
!= NULL
)
9935 sections
->abbrev
.s
.section
= sectp
;
9936 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9938 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9939 || section_is_p (sectp
->name
, &names
->types_dwo
))
9941 /* There can be only one. */
9942 if (sections
->info_or_types
.s
.section
!= NULL
)
9944 sections
->info_or_types
.s
.section
= sectp
;
9945 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9947 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9949 /* There can be only one. */
9950 if (sections
->line
.s
.section
!= NULL
)
9952 sections
->line
.s
.section
= sectp
;
9953 sections
->line
.size
= bfd_get_section_size (sectp
);
9955 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9957 /* There can be only one. */
9958 if (sections
->loc
.s
.section
!= NULL
)
9960 sections
->loc
.s
.section
= sectp
;
9961 sections
->loc
.size
= bfd_get_section_size (sectp
);
9963 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9965 /* There can be only one. */
9966 if (sections
->macinfo
.s
.section
!= NULL
)
9968 sections
->macinfo
.s
.section
= sectp
;
9969 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9971 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9973 /* There can be only one. */
9974 if (sections
->macro
.s
.section
!= NULL
)
9976 sections
->macro
.s
.section
= sectp
;
9977 sections
->macro
.size
= bfd_get_section_size (sectp
);
9979 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9981 /* There can be only one. */
9982 if (sections
->str_offsets
.s
.section
!= NULL
)
9984 sections
->str_offsets
.s
.section
= sectp
;
9985 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9989 /* No other kind of section is valid. */
9996 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9997 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9998 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9999 This is for DWP version 1 files. */
10001 static struct dwo_unit
*
10002 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10003 uint32_t unit_index
,
10004 const char *comp_dir
,
10005 ULONGEST signature
, int is_debug_types
)
10007 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10008 const struct dwp_hash_table
*dwp_htab
=
10009 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10010 bfd
*dbfd
= dwp_file
->dbfd
;
10011 const char *kind
= is_debug_types
? "TU" : "CU";
10012 struct dwo_file
*dwo_file
;
10013 struct dwo_unit
*dwo_unit
;
10014 struct virtual_v1_dwo_sections sections
;
10015 void **dwo_file_slot
;
10016 char *virtual_dwo_name
;
10017 struct cleanup
*cleanups
;
10020 gdb_assert (dwp_file
->version
== 1);
10022 if (dwarf_read_debug
)
10024 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10026 pulongest (unit_index
), hex_string (signature
),
10030 /* Fetch the sections of this DWO unit.
10031 Put a limit on the number of sections we look for so that bad data
10032 doesn't cause us to loop forever. */
10034 #define MAX_NR_V1_DWO_SECTIONS \
10035 (1 /* .debug_info or .debug_types */ \
10036 + 1 /* .debug_abbrev */ \
10037 + 1 /* .debug_line */ \
10038 + 1 /* .debug_loc */ \
10039 + 1 /* .debug_str_offsets */ \
10040 + 1 /* .debug_macro or .debug_macinfo */ \
10041 + 1 /* trailing zero */)
10043 memset (§ions
, 0, sizeof (sections
));
10044 cleanups
= make_cleanup (null_cleanup
, 0);
10046 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10049 uint32_t section_nr
=
10050 read_4_bytes (dbfd
,
10051 dwp_htab
->section_pool
.v1
.indices
10052 + (unit_index
+ i
) * sizeof (uint32_t));
10054 if (section_nr
== 0)
10056 if (section_nr
>= dwp_file
->num_sections
)
10058 error (_("Dwarf Error: bad DWP hash table, section number too large"
10059 " [in module %s]"),
10063 sectp
= dwp_file
->elf_sections
[section_nr
];
10064 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10066 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10067 " [in module %s]"),
10073 || dwarf2_section_empty_p (§ions
.info_or_types
)
10074 || dwarf2_section_empty_p (§ions
.abbrev
))
10076 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10077 " [in module %s]"),
10080 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10082 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10083 " [in module %s]"),
10087 /* It's easier for the rest of the code if we fake a struct dwo_file and
10088 have dwo_unit "live" in that. At least for now.
10090 The DWP file can be made up of a random collection of CUs and TUs.
10091 However, for each CU + set of TUs that came from the same original DWO
10092 file, we can combine them back into a virtual DWO file to save space
10093 (fewer struct dwo_file objects to allocate). Remember that for really
10094 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10097 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10098 get_section_id (§ions
.abbrev
),
10099 get_section_id (§ions
.line
),
10100 get_section_id (§ions
.loc
),
10101 get_section_id (§ions
.str_offsets
));
10102 make_cleanup (xfree
, virtual_dwo_name
);
10103 /* Can we use an existing virtual DWO file? */
10104 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10105 /* Create one if necessary. */
10106 if (*dwo_file_slot
== NULL
)
10108 if (dwarf_read_debug
)
10110 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10113 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10115 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10117 strlen (virtual_dwo_name
));
10118 dwo_file
->comp_dir
= comp_dir
;
10119 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10120 dwo_file
->sections
.line
= sections
.line
;
10121 dwo_file
->sections
.loc
= sections
.loc
;
10122 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10123 dwo_file
->sections
.macro
= sections
.macro
;
10124 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10125 /* The "str" section is global to the entire DWP file. */
10126 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10127 /* The info or types section is assigned below to dwo_unit,
10128 there's no need to record it in dwo_file.
10129 Also, we can't simply record type sections in dwo_file because
10130 we record a pointer into the vector in dwo_unit. As we collect more
10131 types we'll grow the vector and eventually have to reallocate space
10132 for it, invalidating all copies of pointers into the previous
10134 *dwo_file_slot
= dwo_file
;
10138 if (dwarf_read_debug
)
10140 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10143 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10145 do_cleanups (cleanups
);
10147 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10148 dwo_unit
->dwo_file
= dwo_file
;
10149 dwo_unit
->signature
= signature
;
10150 dwo_unit
->section
=
10151 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10152 *dwo_unit
->section
= sections
.info_or_types
;
10153 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10158 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10159 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10160 piece within that section used by a TU/CU, return a virtual section
10161 of just that piece. */
10163 static struct dwarf2_section_info
10164 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10165 bfd_size_type offset
, bfd_size_type size
)
10167 struct dwarf2_section_info result
;
10170 gdb_assert (section
!= NULL
);
10171 gdb_assert (!section
->is_virtual
);
10173 memset (&result
, 0, sizeof (result
));
10174 result
.s
.containing_section
= section
;
10175 result
.is_virtual
= 1;
10180 sectp
= get_section_bfd_section (section
);
10182 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10183 bounds of the real section. This is a pretty-rare event, so just
10184 flag an error (easier) instead of a warning and trying to cope. */
10186 || offset
+ size
> bfd_get_section_size (sectp
))
10188 bfd
*abfd
= sectp
->owner
;
10190 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10191 " in section %s [in module %s]"),
10192 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10193 objfile_name (dwarf2_per_objfile
->objfile
));
10196 result
.virtual_offset
= offset
;
10197 result
.size
= size
;
10201 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10202 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10203 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10204 This is for DWP version 2 files. */
10206 static struct dwo_unit
*
10207 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10208 uint32_t unit_index
,
10209 const char *comp_dir
,
10210 ULONGEST signature
, int is_debug_types
)
10212 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10213 const struct dwp_hash_table
*dwp_htab
=
10214 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10215 bfd
*dbfd
= dwp_file
->dbfd
;
10216 const char *kind
= is_debug_types
? "TU" : "CU";
10217 struct dwo_file
*dwo_file
;
10218 struct dwo_unit
*dwo_unit
;
10219 struct virtual_v2_dwo_sections sections
;
10220 void **dwo_file_slot
;
10221 char *virtual_dwo_name
;
10222 struct cleanup
*cleanups
;
10225 gdb_assert (dwp_file
->version
== 2);
10227 if (dwarf_read_debug
)
10229 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10231 pulongest (unit_index
), hex_string (signature
),
10235 /* Fetch the section offsets of this DWO unit. */
10237 memset (§ions
, 0, sizeof (sections
));
10238 cleanups
= make_cleanup (null_cleanup
, 0);
10240 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10242 uint32_t offset
= read_4_bytes (dbfd
,
10243 dwp_htab
->section_pool
.v2
.offsets
10244 + (((unit_index
- 1) * dwp_htab
->nr_columns
10246 * sizeof (uint32_t)));
10247 uint32_t size
= read_4_bytes (dbfd
,
10248 dwp_htab
->section_pool
.v2
.sizes
10249 + (((unit_index
- 1) * dwp_htab
->nr_columns
10251 * sizeof (uint32_t)));
10253 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10256 case DW_SECT_TYPES
:
10257 sections
.info_or_types_offset
= offset
;
10258 sections
.info_or_types_size
= size
;
10260 case DW_SECT_ABBREV
:
10261 sections
.abbrev_offset
= offset
;
10262 sections
.abbrev_size
= size
;
10265 sections
.line_offset
= offset
;
10266 sections
.line_size
= size
;
10269 sections
.loc_offset
= offset
;
10270 sections
.loc_size
= size
;
10272 case DW_SECT_STR_OFFSETS
:
10273 sections
.str_offsets_offset
= offset
;
10274 sections
.str_offsets_size
= size
;
10276 case DW_SECT_MACINFO
:
10277 sections
.macinfo_offset
= offset
;
10278 sections
.macinfo_size
= size
;
10280 case DW_SECT_MACRO
:
10281 sections
.macro_offset
= offset
;
10282 sections
.macro_size
= size
;
10287 /* It's easier for the rest of the code if we fake a struct dwo_file and
10288 have dwo_unit "live" in that. At least for now.
10290 The DWP file can be made up of a random collection of CUs and TUs.
10291 However, for each CU + set of TUs that came from the same original DWO
10292 file, we can combine them back into a virtual DWO file to save space
10293 (fewer struct dwo_file objects to allocate). Remember that for really
10294 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10297 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10298 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10299 (long) (sections
.line_size
? sections
.line_offset
: 0),
10300 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10301 (long) (sections
.str_offsets_size
10302 ? sections
.str_offsets_offset
: 0));
10303 make_cleanup (xfree
, virtual_dwo_name
);
10304 /* Can we use an existing virtual DWO file? */
10305 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10306 /* Create one if necessary. */
10307 if (*dwo_file_slot
== NULL
)
10309 if (dwarf_read_debug
)
10311 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10314 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10316 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10318 strlen (virtual_dwo_name
));
10319 dwo_file
->comp_dir
= comp_dir
;
10320 dwo_file
->sections
.abbrev
=
10321 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10322 sections
.abbrev_offset
, sections
.abbrev_size
);
10323 dwo_file
->sections
.line
=
10324 create_dwp_v2_section (&dwp_file
->sections
.line
,
10325 sections
.line_offset
, sections
.line_size
);
10326 dwo_file
->sections
.loc
=
10327 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10328 sections
.loc_offset
, sections
.loc_size
);
10329 dwo_file
->sections
.macinfo
=
10330 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10331 sections
.macinfo_offset
, sections
.macinfo_size
);
10332 dwo_file
->sections
.macro
=
10333 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10334 sections
.macro_offset
, sections
.macro_size
);
10335 dwo_file
->sections
.str_offsets
=
10336 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10337 sections
.str_offsets_offset
,
10338 sections
.str_offsets_size
);
10339 /* The "str" section is global to the entire DWP file. */
10340 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10341 /* The info or types section is assigned below to dwo_unit,
10342 there's no need to record it in dwo_file.
10343 Also, we can't simply record type sections in dwo_file because
10344 we record a pointer into the vector in dwo_unit. As we collect more
10345 types we'll grow the vector and eventually have to reallocate space
10346 for it, invalidating all copies of pointers into the previous
10348 *dwo_file_slot
= dwo_file
;
10352 if (dwarf_read_debug
)
10354 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10357 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10359 do_cleanups (cleanups
);
10361 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10362 dwo_unit
->dwo_file
= dwo_file
;
10363 dwo_unit
->signature
= signature
;
10364 dwo_unit
->section
=
10365 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10366 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10367 ? &dwp_file
->sections
.types
10368 : &dwp_file
->sections
.info
,
10369 sections
.info_or_types_offset
,
10370 sections
.info_or_types_size
);
10371 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10376 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10377 Returns NULL if the signature isn't found. */
10379 static struct dwo_unit
*
10380 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10381 ULONGEST signature
, int is_debug_types
)
10383 const struct dwp_hash_table
*dwp_htab
=
10384 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10385 bfd
*dbfd
= dwp_file
->dbfd
;
10386 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10387 uint32_t hash
= signature
& mask
;
10388 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10391 struct dwo_unit find_dwo_cu
;
10393 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10394 find_dwo_cu
.signature
= signature
;
10395 slot
= htab_find_slot (is_debug_types
10396 ? dwp_file
->loaded_tus
10397 : dwp_file
->loaded_cus
,
10398 &find_dwo_cu
, INSERT
);
10401 return (struct dwo_unit
*) *slot
;
10403 /* Use a for loop so that we don't loop forever on bad debug info. */
10404 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10406 ULONGEST signature_in_table
;
10408 signature_in_table
=
10409 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10410 if (signature_in_table
== signature
)
10412 uint32_t unit_index
=
10413 read_4_bytes (dbfd
,
10414 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10416 if (dwp_file
->version
== 1)
10418 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10419 comp_dir
, signature
,
10424 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10425 comp_dir
, signature
,
10428 return (struct dwo_unit
*) *slot
;
10430 if (signature_in_table
== 0)
10432 hash
= (hash
+ hash2
) & mask
;
10435 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10436 " [in module %s]"),
10440 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10441 Open the file specified by FILE_NAME and hand it off to BFD for
10442 preliminary analysis. Return a newly initialized bfd *, which
10443 includes a canonicalized copy of FILE_NAME.
10444 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10445 SEARCH_CWD is true if the current directory is to be searched.
10446 It will be searched before debug-file-directory.
10447 If successful, the file is added to the bfd include table of the
10448 objfile's bfd (see gdb_bfd_record_inclusion).
10449 If unable to find/open the file, return NULL.
10450 NOTE: This function is derived from symfile_bfd_open. */
10453 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10457 char *absolute_name
;
10458 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10459 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10460 to debug_file_directory. */
10462 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10466 if (*debug_file_directory
!= '\0')
10467 search_path
= concat (".", dirname_separator_string
,
10468 debug_file_directory
, (char *) NULL
);
10470 search_path
= xstrdup (".");
10473 search_path
= xstrdup (debug_file_directory
);
10475 flags
= OPF_RETURN_REALPATH
;
10477 flags
|= OPF_SEARCH_IN_PATH
;
10478 desc
= openp (search_path
, flags
, file_name
,
10479 O_RDONLY
| O_BINARY
, &absolute_name
);
10480 xfree (search_path
);
10484 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10485 xfree (absolute_name
);
10486 if (sym_bfd
== NULL
)
10488 bfd_set_cacheable (sym_bfd
, 1);
10490 if (!bfd_check_format (sym_bfd
, bfd_object
))
10492 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10496 /* Success. Record the bfd as having been included by the objfile's bfd.
10497 This is important because things like demangled_names_hash lives in the
10498 objfile's per_bfd space and may have references to things like symbol
10499 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10500 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10505 /* Try to open DWO file FILE_NAME.
10506 COMP_DIR is the DW_AT_comp_dir attribute.
10507 The result is the bfd handle of the file.
10508 If there is a problem finding or opening the file, return NULL.
10509 Upon success, the canonicalized path of the file is stored in the bfd,
10510 same as symfile_bfd_open. */
10513 open_dwo_file (const char *file_name
, const char *comp_dir
)
10517 if (IS_ABSOLUTE_PATH (file_name
))
10518 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10520 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10522 if (comp_dir
!= NULL
)
10524 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10525 file_name
, (char *) NULL
);
10527 /* NOTE: If comp_dir is a relative path, this will also try the
10528 search path, which seems useful. */
10529 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10530 xfree (path_to_try
);
10535 /* That didn't work, try debug-file-directory, which, despite its name,
10536 is a list of paths. */
10538 if (*debug_file_directory
== '\0')
10541 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10544 /* This function is mapped across the sections and remembers the offset and
10545 size of each of the DWO debugging sections we are interested in. */
10548 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10550 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10551 const struct dwop_section_names
*names
= &dwop_section_names
;
10553 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10555 dwo_sections
->abbrev
.s
.section
= sectp
;
10556 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10558 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10560 dwo_sections
->info
.s
.section
= sectp
;
10561 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10563 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10565 dwo_sections
->line
.s
.section
= sectp
;
10566 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10568 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10570 dwo_sections
->loc
.s
.section
= sectp
;
10571 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10573 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10575 dwo_sections
->macinfo
.s
.section
= sectp
;
10576 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10578 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10580 dwo_sections
->macro
.s
.section
= sectp
;
10581 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10583 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10585 dwo_sections
->str
.s
.section
= sectp
;
10586 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10588 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10590 dwo_sections
->str_offsets
.s
.section
= sectp
;
10591 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10593 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10595 struct dwarf2_section_info type_section
;
10597 memset (&type_section
, 0, sizeof (type_section
));
10598 type_section
.s
.section
= sectp
;
10599 type_section
.size
= bfd_get_section_size (sectp
);
10600 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10605 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10606 by PER_CU. This is for the non-DWP case.
10607 The result is NULL if DWO_NAME can't be found. */
10609 static struct dwo_file
*
10610 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10611 const char *dwo_name
, const char *comp_dir
)
10613 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10614 struct dwo_file
*dwo_file
;
10616 struct cleanup
*cleanups
;
10618 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10621 if (dwarf_read_debug
)
10622 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10625 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10626 dwo_file
->dwo_name
= dwo_name
;
10627 dwo_file
->comp_dir
= comp_dir
;
10628 dwo_file
->dbfd
= dbfd
;
10630 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10632 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10634 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10636 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10637 dwo_file
->sections
.types
);
10639 discard_cleanups (cleanups
);
10641 if (dwarf_read_debug
)
10642 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10647 /* This function is mapped across the sections and remembers the offset and
10648 size of each of the DWP debugging sections common to version 1 and 2 that
10649 we are interested in. */
10652 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10653 void *dwp_file_ptr
)
10655 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10656 const struct dwop_section_names
*names
= &dwop_section_names
;
10657 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10659 /* Record the ELF section number for later lookup: this is what the
10660 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10661 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10662 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10664 /* Look for specific sections that we need. */
10665 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10667 dwp_file
->sections
.str
.s
.section
= sectp
;
10668 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10670 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10672 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10673 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10675 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10677 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10678 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10682 /* This function is mapped across the sections and remembers the offset and
10683 size of each of the DWP version 2 debugging sections that we are interested
10684 in. This is split into a separate function because we don't know if we
10685 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10688 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10690 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10691 const struct dwop_section_names
*names
= &dwop_section_names
;
10692 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10694 /* Record the ELF section number for later lookup: this is what the
10695 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10696 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10697 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10699 /* Look for specific sections that we need. */
10700 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10702 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10703 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10705 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10707 dwp_file
->sections
.info
.s
.section
= sectp
;
10708 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10710 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10712 dwp_file
->sections
.line
.s
.section
= sectp
;
10713 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10715 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10717 dwp_file
->sections
.loc
.s
.section
= sectp
;
10718 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10720 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10722 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
10723 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10725 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10727 dwp_file
->sections
.macro
.s
.section
= sectp
;
10728 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10730 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10732 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
10733 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10735 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10737 dwp_file
->sections
.types
.s
.section
= sectp
;
10738 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10742 /* Hash function for dwp_file loaded CUs/TUs. */
10745 hash_dwp_loaded_cutus (const void *item
)
10747 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10749 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10750 return dwo_unit
->signature
;
10753 /* Equality function for dwp_file loaded CUs/TUs. */
10756 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10758 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
10759 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
10761 return dua
->signature
== dub
->signature
;
10764 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10767 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10769 return htab_create_alloc_ex (3,
10770 hash_dwp_loaded_cutus
,
10771 eq_dwp_loaded_cutus
,
10773 &objfile
->objfile_obstack
,
10774 hashtab_obstack_allocate
,
10775 dummy_obstack_deallocate
);
10778 /* Try to open DWP file FILE_NAME.
10779 The result is the bfd handle of the file.
10780 If there is a problem finding or opening the file, return NULL.
10781 Upon success, the canonicalized path of the file is stored in the bfd,
10782 same as symfile_bfd_open. */
10785 open_dwp_file (const char *file_name
)
10789 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10793 /* Work around upstream bug 15652.
10794 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10795 [Whether that's a "bug" is debatable, but it is getting in our way.]
10796 We have no real idea where the dwp file is, because gdb's realpath-ing
10797 of the executable's path may have discarded the needed info.
10798 [IWBN if the dwp file name was recorded in the executable, akin to
10799 .gnu_debuglink, but that doesn't exist yet.]
10800 Strip the directory from FILE_NAME and search again. */
10801 if (*debug_file_directory
!= '\0')
10803 /* Don't implicitly search the current directory here.
10804 If the user wants to search "." to handle this case,
10805 it must be added to debug-file-directory. */
10806 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10813 /* Initialize the use of the DWP file for the current objfile.
10814 By convention the name of the DWP file is ${objfile}.dwp.
10815 The result is NULL if it can't be found. */
10817 static struct dwp_file
*
10818 open_and_init_dwp_file (void)
10820 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10821 struct dwp_file
*dwp_file
;
10824 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, 0);
10826 /* Try to find first .dwp for the binary file before any symbolic links
10829 /* If the objfile is a debug file, find the name of the real binary
10830 file and get the name of dwp file from there. */
10831 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
10833 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
10834 const char *backlink_basename
= lbasename (backlink
->original_name
);
10835 char *debug_dirname
= ldirname (objfile
->original_name
);
10837 make_cleanup (xfree
, debug_dirname
);
10838 dwp_name
= xstrprintf ("%s%s%s.dwp", debug_dirname
,
10839 SLASH_STRING
, backlink_basename
);
10842 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10843 make_cleanup (xfree
, dwp_name
);
10845 dbfd
= open_dwp_file (dwp_name
);
10847 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10849 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10850 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10851 make_cleanup (xfree
, dwp_name
);
10852 dbfd
= open_dwp_file (dwp_name
);
10857 if (dwarf_read_debug
)
10858 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10859 do_cleanups (cleanups
);
10862 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10863 dwp_file
->name
= bfd_get_filename (dbfd
);
10864 dwp_file
->dbfd
= dbfd
;
10865 do_cleanups (cleanups
);
10867 /* +1: section 0 is unused */
10868 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10869 dwp_file
->elf_sections
=
10870 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10871 dwp_file
->num_sections
, asection
*);
10873 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10875 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10877 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10879 /* The DWP file version is stored in the hash table. Oh well. */
10880 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10882 /* Technically speaking, we should try to limp along, but this is
10883 pretty bizarre. We use pulongest here because that's the established
10884 portability solution (e.g, we cannot use %u for uint32_t). */
10885 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10886 " TU version %s [in DWP file %s]"),
10887 pulongest (dwp_file
->cus
->version
),
10888 pulongest (dwp_file
->tus
->version
), dwp_name
);
10890 dwp_file
->version
= dwp_file
->cus
->version
;
10892 if (dwp_file
->version
== 2)
10893 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10895 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10896 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10898 if (dwarf_read_debug
)
10900 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10901 fprintf_unfiltered (gdb_stdlog
,
10902 " %s CUs, %s TUs\n",
10903 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10904 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10910 /* Wrapper around open_and_init_dwp_file, only open it once. */
10912 static struct dwp_file
*
10913 get_dwp_file (void)
10915 if (! dwarf2_per_objfile
->dwp_checked
)
10917 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10918 dwarf2_per_objfile
->dwp_checked
= 1;
10920 return dwarf2_per_objfile
->dwp_file
;
10923 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10924 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10925 or in the DWP file for the objfile, referenced by THIS_UNIT.
10926 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10927 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10929 This is called, for example, when wanting to read a variable with a
10930 complex location. Therefore we don't want to do file i/o for every call.
10931 Therefore we don't want to look for a DWO file on every call.
10932 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10933 then we check if we've already seen DWO_NAME, and only THEN do we check
10936 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10937 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10939 static struct dwo_unit
*
10940 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10941 const char *dwo_name
, const char *comp_dir
,
10942 ULONGEST signature
, int is_debug_types
)
10944 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10945 const char *kind
= is_debug_types
? "TU" : "CU";
10946 void **dwo_file_slot
;
10947 struct dwo_file
*dwo_file
;
10948 struct dwp_file
*dwp_file
;
10950 /* First see if there's a DWP file.
10951 If we have a DWP file but didn't find the DWO inside it, don't
10952 look for the original DWO file. It makes gdb behave differently
10953 depending on whether one is debugging in the build tree. */
10955 dwp_file
= get_dwp_file ();
10956 if (dwp_file
!= NULL
)
10958 const struct dwp_hash_table
*dwp_htab
=
10959 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10961 if (dwp_htab
!= NULL
)
10963 struct dwo_unit
*dwo_cutu
=
10964 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10965 signature
, is_debug_types
);
10967 if (dwo_cutu
!= NULL
)
10969 if (dwarf_read_debug
)
10971 fprintf_unfiltered (gdb_stdlog
,
10972 "Virtual DWO %s %s found: @%s\n",
10973 kind
, hex_string (signature
),
10974 host_address_to_string (dwo_cutu
));
10982 /* No DWP file, look for the DWO file. */
10984 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10985 if (*dwo_file_slot
== NULL
)
10987 /* Read in the file and build a table of the CUs/TUs it contains. */
10988 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10990 /* NOTE: This will be NULL if unable to open the file. */
10991 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10993 if (dwo_file
!= NULL
)
10995 struct dwo_unit
*dwo_cutu
= NULL
;
10997 if (is_debug_types
&& dwo_file
->tus
)
10999 struct dwo_unit find_dwo_cutu
;
11001 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11002 find_dwo_cutu
.signature
= signature
;
11004 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11006 else if (!is_debug_types
&& dwo_file
->cu
)
11008 if (signature
== dwo_file
->cu
->signature
)
11009 dwo_cutu
= dwo_file
->cu
;
11012 if (dwo_cutu
!= NULL
)
11014 if (dwarf_read_debug
)
11016 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11017 kind
, dwo_name
, hex_string (signature
),
11018 host_address_to_string (dwo_cutu
));
11025 /* We didn't find it. This could mean a dwo_id mismatch, or
11026 someone deleted the DWO/DWP file, or the search path isn't set up
11027 correctly to find the file. */
11029 if (dwarf_read_debug
)
11031 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11032 kind
, dwo_name
, hex_string (signature
));
11035 /* This is a warning and not a complaint because it can be caused by
11036 pilot error (e.g., user accidentally deleting the DWO). */
11038 /* Print the name of the DWP file if we looked there, helps the user
11039 better diagnose the problem. */
11040 char *dwp_text
= NULL
;
11041 struct cleanup
*cleanups
;
11043 if (dwp_file
!= NULL
)
11044 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11045 cleanups
= make_cleanup (xfree
, dwp_text
);
11047 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11048 " [in module %s]"),
11049 kind
, dwo_name
, hex_string (signature
),
11050 dwp_text
!= NULL
? dwp_text
: "",
11051 this_unit
->is_debug_types
? "TU" : "CU",
11052 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11054 do_cleanups (cleanups
);
11059 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11060 See lookup_dwo_cutu_unit for details. */
11062 static struct dwo_unit
*
11063 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11064 const char *dwo_name
, const char *comp_dir
,
11065 ULONGEST signature
)
11067 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11070 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11071 See lookup_dwo_cutu_unit for details. */
11073 static struct dwo_unit
*
11074 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11075 const char *dwo_name
, const char *comp_dir
)
11077 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11080 /* Traversal function for queue_and_load_all_dwo_tus. */
11083 queue_and_load_dwo_tu (void **slot
, void *info
)
11085 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11086 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11087 ULONGEST signature
= dwo_unit
->signature
;
11088 struct signatured_type
*sig_type
=
11089 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11091 if (sig_type
!= NULL
)
11093 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11095 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11096 a real dependency of PER_CU on SIG_TYPE. That is detected later
11097 while processing PER_CU. */
11098 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11099 load_full_type_unit (sig_cu
);
11100 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11106 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11107 The DWO may have the only definition of the type, though it may not be
11108 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11109 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11112 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11114 struct dwo_unit
*dwo_unit
;
11115 struct dwo_file
*dwo_file
;
11117 gdb_assert (!per_cu
->is_debug_types
);
11118 gdb_assert (get_dwp_file () == NULL
);
11119 gdb_assert (per_cu
->cu
!= NULL
);
11121 dwo_unit
= per_cu
->cu
->dwo_unit
;
11122 gdb_assert (dwo_unit
!= NULL
);
11124 dwo_file
= dwo_unit
->dwo_file
;
11125 if (dwo_file
->tus
!= NULL
)
11126 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11129 /* Free all resources associated with DWO_FILE.
11130 Close the DWO file and munmap the sections.
11131 All memory should be on the objfile obstack. */
11134 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11137 /* Note: dbfd is NULL for virtual DWO files. */
11138 gdb_bfd_unref (dwo_file
->dbfd
);
11140 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11143 /* Wrapper for free_dwo_file for use in cleanups. */
11146 free_dwo_file_cleanup (void *arg
)
11148 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11149 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11151 free_dwo_file (dwo_file
, objfile
);
11154 /* Traversal function for free_dwo_files. */
11157 free_dwo_file_from_slot (void **slot
, void *info
)
11159 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11160 struct objfile
*objfile
= (struct objfile
*) info
;
11162 free_dwo_file (dwo_file
, objfile
);
11167 /* Free all resources associated with DWO_FILES. */
11170 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11172 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11175 /* Read in various DIEs. */
11177 /* qsort helper for inherit_abstract_dies. */
11180 unsigned_int_compar (const void *ap
, const void *bp
)
11182 unsigned int a
= *(unsigned int *) ap
;
11183 unsigned int b
= *(unsigned int *) bp
;
11185 return (a
> b
) - (b
> a
);
11188 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11189 Inherit only the children of the DW_AT_abstract_origin DIE not being
11190 already referenced by DW_AT_abstract_origin from the children of the
11194 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11196 struct die_info
*child_die
;
11197 unsigned die_children_count
;
11198 /* CU offsets which were referenced by children of the current DIE. */
11199 sect_offset
*offsets
;
11200 sect_offset
*offsets_end
, *offsetp
;
11201 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11202 struct die_info
*origin_die
;
11203 /* Iterator of the ORIGIN_DIE children. */
11204 struct die_info
*origin_child_die
;
11205 struct cleanup
*cleanups
;
11206 struct attribute
*attr
;
11207 struct dwarf2_cu
*origin_cu
;
11208 struct pending
**origin_previous_list_in_scope
;
11210 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11214 /* Note that following die references may follow to a die in a
11218 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11220 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11222 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11223 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11225 if (die
->tag
!= origin_die
->tag
11226 && !(die
->tag
== DW_TAG_inlined_subroutine
11227 && origin_die
->tag
== DW_TAG_subprogram
))
11228 complaint (&symfile_complaints
,
11229 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11230 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11232 child_die
= die
->child
;
11233 die_children_count
= 0;
11234 while (child_die
&& child_die
->tag
)
11236 child_die
= sibling_die (child_die
);
11237 die_children_count
++;
11239 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11240 cleanups
= make_cleanup (xfree
, offsets
);
11242 offsets_end
= offsets
;
11243 for (child_die
= die
->child
;
11244 child_die
&& child_die
->tag
;
11245 child_die
= sibling_die (child_die
))
11247 struct die_info
*child_origin_die
;
11248 struct dwarf2_cu
*child_origin_cu
;
11250 /* We are trying to process concrete instance entries:
11251 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11252 it's not relevant to our analysis here. i.e. detecting DIEs that are
11253 present in the abstract instance but not referenced in the concrete
11255 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11258 /* For each CHILD_DIE, find the corresponding child of
11259 ORIGIN_DIE. If there is more than one layer of
11260 DW_AT_abstract_origin, follow them all; there shouldn't be,
11261 but GCC versions at least through 4.4 generate this (GCC PR
11263 child_origin_die
= child_die
;
11264 child_origin_cu
= cu
;
11267 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11271 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11275 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11276 counterpart may exist. */
11277 if (child_origin_die
!= child_die
)
11279 if (child_die
->tag
!= child_origin_die
->tag
11280 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11281 && child_origin_die
->tag
== DW_TAG_subprogram
))
11282 complaint (&symfile_complaints
,
11283 _("Child DIE 0x%x and its abstract origin 0x%x have "
11284 "different tags"), child_die
->offset
.sect_off
,
11285 child_origin_die
->offset
.sect_off
);
11286 if (child_origin_die
->parent
!= origin_die
)
11287 complaint (&symfile_complaints
,
11288 _("Child DIE 0x%x and its abstract origin 0x%x have "
11289 "different parents"), child_die
->offset
.sect_off
,
11290 child_origin_die
->offset
.sect_off
);
11292 *offsets_end
++ = child_origin_die
->offset
;
11295 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11296 unsigned_int_compar
);
11297 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11298 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11299 complaint (&symfile_complaints
,
11300 _("Multiple children of DIE 0x%x refer "
11301 "to DIE 0x%x as their abstract origin"),
11302 die
->offset
.sect_off
, offsetp
->sect_off
);
11305 origin_child_die
= origin_die
->child
;
11306 while (origin_child_die
&& origin_child_die
->tag
)
11308 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11309 while (offsetp
< offsets_end
11310 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11312 if (offsetp
>= offsets_end
11313 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11315 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11316 Check whether we're already processing ORIGIN_CHILD_DIE.
11317 This can happen with mutually referenced abstract_origins.
11319 if (!origin_child_die
->in_process
)
11320 process_die (origin_child_die
, origin_cu
);
11322 origin_child_die
= sibling_die (origin_child_die
);
11324 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11326 do_cleanups (cleanups
);
11330 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11332 struct objfile
*objfile
= cu
->objfile
;
11333 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11334 struct context_stack
*newobj
;
11337 struct die_info
*child_die
;
11338 struct attribute
*attr
, *call_line
, *call_file
;
11340 CORE_ADDR baseaddr
;
11341 struct block
*block
;
11342 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11343 VEC (symbolp
) *template_args
= NULL
;
11344 struct template_symbol
*templ_func
= NULL
;
11348 /* If we do not have call site information, we can't show the
11349 caller of this inlined function. That's too confusing, so
11350 only use the scope for local variables. */
11351 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11352 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11353 if (call_line
== NULL
|| call_file
== NULL
)
11355 read_lexical_block_scope (die
, cu
);
11360 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11362 name
= dwarf2_name (die
, cu
);
11364 /* Ignore functions with missing or empty names. These are actually
11365 illegal according to the DWARF standard. */
11368 complaint (&symfile_complaints
,
11369 _("missing name for subprogram DIE at %d"),
11370 die
->offset
.sect_off
);
11374 /* Ignore functions with missing or invalid low and high pc attributes. */
11375 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11377 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11378 if (!attr
|| !DW_UNSND (attr
))
11379 complaint (&symfile_complaints
,
11380 _("cannot get low and high bounds "
11381 "for subprogram DIE at %d"),
11382 die
->offset
.sect_off
);
11386 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11387 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11389 /* If we have any template arguments, then we must allocate a
11390 different sort of symbol. */
11391 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11393 if (child_die
->tag
== DW_TAG_template_type_param
11394 || child_die
->tag
== DW_TAG_template_value_param
)
11396 templ_func
= allocate_template_symbol (objfile
);
11397 templ_func
->base
.is_cplus_template_function
= 1;
11402 newobj
= push_context (0, lowpc
);
11403 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11404 (struct symbol
*) templ_func
);
11406 /* If there is a location expression for DW_AT_frame_base, record
11408 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11410 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11412 /* If there is a location for the static link, record it. */
11413 newobj
->static_link
= NULL
;
11414 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11417 newobj
->static_link
11418 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11419 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11422 cu
->list_in_scope
= &local_symbols
;
11424 if (die
->child
!= NULL
)
11426 child_die
= die
->child
;
11427 while (child_die
&& child_die
->tag
)
11429 if (child_die
->tag
== DW_TAG_template_type_param
11430 || child_die
->tag
== DW_TAG_template_value_param
)
11432 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11435 VEC_safe_push (symbolp
, template_args
, arg
);
11438 process_die (child_die
, cu
);
11439 child_die
= sibling_die (child_die
);
11443 inherit_abstract_dies (die
, cu
);
11445 /* If we have a DW_AT_specification, we might need to import using
11446 directives from the context of the specification DIE. See the
11447 comment in determine_prefix. */
11448 if (cu
->language
== language_cplus
11449 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11451 struct dwarf2_cu
*spec_cu
= cu
;
11452 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11456 child_die
= spec_die
->child
;
11457 while (child_die
&& child_die
->tag
)
11459 if (child_die
->tag
== DW_TAG_imported_module
)
11460 process_die (child_die
, spec_cu
);
11461 child_die
= sibling_die (child_die
);
11464 /* In some cases, GCC generates specification DIEs that
11465 themselves contain DW_AT_specification attributes. */
11466 spec_die
= die_specification (spec_die
, &spec_cu
);
11470 newobj
= pop_context ();
11471 /* Make a block for the local symbols within. */
11472 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11473 newobj
->static_link
, lowpc
, highpc
);
11475 /* For C++, set the block's scope. */
11476 if ((cu
->language
== language_cplus
11477 || cu
->language
== language_fortran
11478 || cu
->language
== language_d
)
11479 && cu
->processing_has_namespace_info
)
11480 block_set_scope (block
, determine_prefix (die
, cu
),
11481 &objfile
->objfile_obstack
);
11483 /* If we have address ranges, record them. */
11484 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11486 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11488 /* Attach template arguments to function. */
11489 if (! VEC_empty (symbolp
, template_args
))
11491 gdb_assert (templ_func
!= NULL
);
11493 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11494 templ_func
->template_arguments
11495 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11496 templ_func
->n_template_arguments
);
11497 memcpy (templ_func
->template_arguments
,
11498 VEC_address (symbolp
, template_args
),
11499 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11500 VEC_free (symbolp
, template_args
);
11503 /* In C++, we can have functions nested inside functions (e.g., when
11504 a function declares a class that has methods). This means that
11505 when we finish processing a function scope, we may need to go
11506 back to building a containing block's symbol lists. */
11507 local_symbols
= newobj
->locals
;
11508 local_using_directives
= newobj
->local_using_directives
;
11510 /* If we've finished processing a top-level function, subsequent
11511 symbols go in the file symbol list. */
11512 if (outermost_context_p ())
11513 cu
->list_in_scope
= &file_symbols
;
11516 /* Process all the DIES contained within a lexical block scope. Start
11517 a new scope, process the dies, and then close the scope. */
11520 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11522 struct objfile
*objfile
= cu
->objfile
;
11523 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11524 struct context_stack
*newobj
;
11525 CORE_ADDR lowpc
, highpc
;
11526 struct die_info
*child_die
;
11527 CORE_ADDR baseaddr
;
11529 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11531 /* Ignore blocks with missing or invalid low and high pc attributes. */
11532 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11533 as multiple lexical blocks? Handling children in a sane way would
11534 be nasty. Might be easier to properly extend generic blocks to
11535 describe ranges. */
11536 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11538 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11539 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11541 push_context (0, lowpc
);
11542 if (die
->child
!= NULL
)
11544 child_die
= die
->child
;
11545 while (child_die
&& child_die
->tag
)
11547 process_die (child_die
, cu
);
11548 child_die
= sibling_die (child_die
);
11551 inherit_abstract_dies (die
, cu
);
11552 newobj
= pop_context ();
11554 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11556 struct block
*block
11557 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11558 newobj
->start_addr
, highpc
);
11560 /* Note that recording ranges after traversing children, as we
11561 do here, means that recording a parent's ranges entails
11562 walking across all its children's ranges as they appear in
11563 the address map, which is quadratic behavior.
11565 It would be nicer to record the parent's ranges before
11566 traversing its children, simply overriding whatever you find
11567 there. But since we don't even decide whether to create a
11568 block until after we've traversed its children, that's hard
11570 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11572 local_symbols
= newobj
->locals
;
11573 local_using_directives
= newobj
->local_using_directives
;
11576 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11579 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11581 struct objfile
*objfile
= cu
->objfile
;
11582 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11583 CORE_ADDR pc
, baseaddr
;
11584 struct attribute
*attr
;
11585 struct call_site
*call_site
, call_site_local
;
11588 struct die_info
*child_die
;
11590 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11592 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11595 complaint (&symfile_complaints
,
11596 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11597 "DIE 0x%x [in module %s]"),
11598 die
->offset
.sect_off
, objfile_name (objfile
));
11601 pc
= attr_value_as_address (attr
) + baseaddr
;
11602 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11604 if (cu
->call_site_htab
== NULL
)
11605 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11606 NULL
, &objfile
->objfile_obstack
,
11607 hashtab_obstack_allocate
, NULL
);
11608 call_site_local
.pc
= pc
;
11609 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11612 complaint (&symfile_complaints
,
11613 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11614 "DIE 0x%x [in module %s]"),
11615 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11616 objfile_name (objfile
));
11620 /* Count parameters at the caller. */
11623 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11624 child_die
= sibling_die (child_die
))
11626 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11628 complaint (&symfile_complaints
,
11629 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11630 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11631 child_die
->tag
, child_die
->offset
.sect_off
,
11632 objfile_name (objfile
));
11640 = ((struct call_site
*)
11641 obstack_alloc (&objfile
->objfile_obstack
,
11642 sizeof (*call_site
)
11643 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11645 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11646 call_site
->pc
= pc
;
11648 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11650 struct die_info
*func_die
;
11652 /* Skip also over DW_TAG_inlined_subroutine. */
11653 for (func_die
= die
->parent
;
11654 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11655 && func_die
->tag
!= DW_TAG_subroutine_type
;
11656 func_die
= func_die
->parent
);
11658 /* DW_AT_GNU_all_call_sites is a superset
11659 of DW_AT_GNU_all_tail_call_sites. */
11661 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11662 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11664 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11665 not complete. But keep CALL_SITE for look ups via call_site_htab,
11666 both the initial caller containing the real return address PC and
11667 the final callee containing the current PC of a chain of tail
11668 calls do not need to have the tail call list complete. But any
11669 function candidate for a virtual tail call frame searched via
11670 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11671 determined unambiguously. */
11675 struct type
*func_type
= NULL
;
11678 func_type
= get_die_type (func_die
, cu
);
11679 if (func_type
!= NULL
)
11681 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11683 /* Enlist this call site to the function. */
11684 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11685 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11688 complaint (&symfile_complaints
,
11689 _("Cannot find function owning DW_TAG_GNU_call_site "
11690 "DIE 0x%x [in module %s]"),
11691 die
->offset
.sect_off
, objfile_name (objfile
));
11695 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11697 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11698 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11699 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11700 /* Keep NULL DWARF_BLOCK. */;
11701 else if (attr_form_is_block (attr
))
11703 struct dwarf2_locexpr_baton
*dlbaton
;
11705 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
11706 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11707 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11708 dlbaton
->per_cu
= cu
->per_cu
;
11710 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11712 else if (attr_form_is_ref (attr
))
11714 struct dwarf2_cu
*target_cu
= cu
;
11715 struct die_info
*target_die
;
11717 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11718 gdb_assert (target_cu
->objfile
== objfile
);
11719 if (die_is_declaration (target_die
, target_cu
))
11721 const char *target_physname
;
11723 /* Prefer the mangled name; otherwise compute the demangled one. */
11724 target_physname
= dwarf2_string_attr (target_die
,
11725 DW_AT_linkage_name
,
11727 if (target_physname
== NULL
)
11728 target_physname
= dwarf2_string_attr (target_die
,
11729 DW_AT_MIPS_linkage_name
,
11731 if (target_physname
== NULL
)
11732 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11733 if (target_physname
== NULL
)
11734 complaint (&symfile_complaints
,
11735 _("DW_AT_GNU_call_site_target target DIE has invalid "
11736 "physname, for referencing DIE 0x%x [in module %s]"),
11737 die
->offset
.sect_off
, objfile_name (objfile
));
11739 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11745 /* DW_AT_entry_pc should be preferred. */
11746 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11747 complaint (&symfile_complaints
,
11748 _("DW_AT_GNU_call_site_target target DIE has invalid "
11749 "low pc, for referencing DIE 0x%x [in module %s]"),
11750 die
->offset
.sect_off
, objfile_name (objfile
));
11753 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11754 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11759 complaint (&symfile_complaints
,
11760 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11761 "block nor reference, for DIE 0x%x [in module %s]"),
11762 die
->offset
.sect_off
, objfile_name (objfile
));
11764 call_site
->per_cu
= cu
->per_cu
;
11766 for (child_die
= die
->child
;
11767 child_die
&& child_die
->tag
;
11768 child_die
= sibling_die (child_die
))
11770 struct call_site_parameter
*parameter
;
11771 struct attribute
*loc
, *origin
;
11773 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11775 /* Already printed the complaint above. */
11779 gdb_assert (call_site
->parameter_count
< nparams
);
11780 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11782 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11783 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11784 register is contained in DW_AT_GNU_call_site_value. */
11786 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11787 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11788 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11790 sect_offset offset
;
11792 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11793 offset
= dwarf2_get_ref_die_offset (origin
);
11794 if (!offset_in_cu_p (&cu
->header
, offset
))
11796 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11797 binding can be done only inside one CU. Such referenced DIE
11798 therefore cannot be even moved to DW_TAG_partial_unit. */
11799 complaint (&symfile_complaints
,
11800 _("DW_AT_abstract_origin offset is not in CU for "
11801 "DW_TAG_GNU_call_site child DIE 0x%x "
11803 child_die
->offset
.sect_off
, objfile_name (objfile
));
11806 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11807 - cu
->header
.offset
.sect_off
);
11809 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11811 complaint (&symfile_complaints
,
11812 _("No DW_FORM_block* DW_AT_location for "
11813 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11814 child_die
->offset
.sect_off
, objfile_name (objfile
));
11819 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11820 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11821 if (parameter
->u
.dwarf_reg
!= -1)
11822 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11823 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11824 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11825 ¶meter
->u
.fb_offset
))
11826 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11829 complaint (&symfile_complaints
,
11830 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11831 "for DW_FORM_block* DW_AT_location is supported for "
11832 "DW_TAG_GNU_call_site child DIE 0x%x "
11834 child_die
->offset
.sect_off
, objfile_name (objfile
));
11839 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11840 if (!attr_form_is_block (attr
))
11842 complaint (&symfile_complaints
,
11843 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11844 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11845 child_die
->offset
.sect_off
, objfile_name (objfile
));
11848 parameter
->value
= DW_BLOCK (attr
)->data
;
11849 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11851 /* Parameters are not pre-cleared by memset above. */
11852 parameter
->data_value
= NULL
;
11853 parameter
->data_value_size
= 0;
11854 call_site
->parameter_count
++;
11856 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11859 if (!attr_form_is_block (attr
))
11860 complaint (&symfile_complaints
,
11861 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11862 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11863 child_die
->offset
.sect_off
, objfile_name (objfile
));
11866 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11867 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11873 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11874 Return 1 if the attributes are present and valid, otherwise, return 0.
11875 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11878 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11879 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11880 struct partial_symtab
*ranges_pst
)
11882 struct objfile
*objfile
= cu
->objfile
;
11883 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11884 struct comp_unit_head
*cu_header
= &cu
->header
;
11885 bfd
*obfd
= objfile
->obfd
;
11886 unsigned int addr_size
= cu_header
->addr_size
;
11887 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11888 /* Base address selection entry. */
11891 unsigned int dummy
;
11892 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
;
11913 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11917 CORE_ADDR range_beginning
, range_end
;
11919 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11920 buffer
+= addr_size
;
11921 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11922 buffer
+= addr_size
;
11923 offset
+= 2 * addr_size
;
11925 /* An end of list marker is a pair of zero addresses. */
11926 if (range_beginning
== 0 && range_end
== 0)
11927 /* Found the end of list entry. */
11930 /* Each base address selection entry is a pair of 2 values.
11931 The first is the largest possible address, the second is
11932 the base address. Check for a base address here. */
11933 if ((range_beginning
& mask
) == mask
)
11935 /* If we found the largest possible address, then we already
11936 have the base address in range_end. */
11944 /* We have no valid base address for the ranges
11946 complaint (&symfile_complaints
,
11947 _("Invalid .debug_ranges data (no base address)"));
11951 if (range_beginning
> range_end
)
11953 /* Inverted range entries are invalid. */
11954 complaint (&symfile_complaints
,
11955 _("Invalid .debug_ranges data (inverted range)"));
11959 /* Empty range entries have no effect. */
11960 if (range_beginning
== range_end
)
11963 range_beginning
+= base
;
11966 /* A not-uncommon case of bad debug info.
11967 Don't pollute the addrmap with bad data. */
11968 if (range_beginning
+ baseaddr
== 0
11969 && !dwarf2_per_objfile
->has_section_at_zero
)
11971 complaint (&symfile_complaints
,
11972 _(".debug_ranges entry has start address of zero"
11973 " [in module %s]"), objfile_name (objfile
));
11977 if (ranges_pst
!= NULL
)
11982 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11983 range_beginning
+ baseaddr
);
11984 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11985 range_end
+ baseaddr
);
11986 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11990 /* FIXME: This is recording everything as a low-high
11991 segment of consecutive addresses. We should have a
11992 data structure for discontiguous block ranges
11996 low
= range_beginning
;
12002 if (range_beginning
< low
)
12003 low
= range_beginning
;
12004 if (range_end
> high
)
12010 /* If the first entry is an end-of-list marker, the range
12011 describes an empty scope, i.e. no instructions. */
12017 *high_return
= high
;
12021 /* Get low and high pc attributes from a die. Return 1 if the attributes
12022 are present and valid, otherwise, return 0. Return -1 if the range is
12023 discontinuous, i.e. derived from DW_AT_ranges information. */
12026 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12027 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12028 struct partial_symtab
*pst
)
12030 struct attribute
*attr
;
12031 struct attribute
*attr_high
;
12033 CORE_ADDR high
= 0;
12036 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12039 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12042 low
= attr_value_as_address (attr
);
12043 high
= attr_value_as_address (attr_high
);
12044 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12048 /* Found high w/o low attribute. */
12051 /* Found consecutive range of addresses. */
12056 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12059 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12060 We take advantage of the fact that DW_AT_ranges does not appear
12061 in DW_TAG_compile_unit of DWO files. */
12062 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12063 unsigned int ranges_offset
= (DW_UNSND (attr
)
12064 + (need_ranges_base
12068 /* Value of the DW_AT_ranges attribute is the offset in the
12069 .debug_ranges section. */
12070 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12072 /* Found discontinuous range of addresses. */
12077 /* read_partial_die has also the strict LOW < HIGH requirement. */
12081 /* When using the GNU linker, .gnu.linkonce. sections are used to
12082 eliminate duplicate copies of functions and vtables and such.
12083 The linker will arbitrarily choose one and discard the others.
12084 The AT_*_pc values for such functions refer to local labels in
12085 these sections. If the section from that file was discarded, the
12086 labels are not in the output, so the relocs get a value of 0.
12087 If this is a discarded function, mark the pc bounds as invalid,
12088 so that GDB will ignore it. */
12089 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12098 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12099 its low and high PC addresses. Do nothing if these addresses could not
12100 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12101 and HIGHPC to the high address if greater than HIGHPC. */
12104 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12105 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12106 struct dwarf2_cu
*cu
)
12108 CORE_ADDR low
, high
;
12109 struct die_info
*child
= die
->child
;
12111 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12113 *lowpc
= min (*lowpc
, low
);
12114 *highpc
= max (*highpc
, high
);
12117 /* If the language does not allow nested subprograms (either inside
12118 subprograms or lexical blocks), we're done. */
12119 if (cu
->language
!= language_ada
)
12122 /* Check all the children of the given DIE. If it contains nested
12123 subprograms, then check their pc bounds. Likewise, we need to
12124 check lexical blocks as well, as they may also contain subprogram
12126 while (child
&& child
->tag
)
12128 if (child
->tag
== DW_TAG_subprogram
12129 || child
->tag
== DW_TAG_lexical_block
)
12130 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12131 child
= sibling_die (child
);
12135 /* Get the low and high pc's represented by the scope DIE, and store
12136 them in *LOWPC and *HIGHPC. If the correct values can't be
12137 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12140 get_scope_pc_bounds (struct die_info
*die
,
12141 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12142 struct dwarf2_cu
*cu
)
12144 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12145 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12146 CORE_ADDR current_low
, current_high
;
12148 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12150 best_low
= current_low
;
12151 best_high
= current_high
;
12155 struct die_info
*child
= die
->child
;
12157 while (child
&& child
->tag
)
12159 switch (child
->tag
) {
12160 case DW_TAG_subprogram
:
12161 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12163 case DW_TAG_namespace
:
12164 case DW_TAG_module
:
12165 /* FIXME: carlton/2004-01-16: Should we do this for
12166 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12167 that current GCC's always emit the DIEs corresponding
12168 to definitions of methods of classes as children of a
12169 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12170 the DIEs giving the declarations, which could be
12171 anywhere). But I don't see any reason why the
12172 standards says that they have to be there. */
12173 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12175 if (current_low
!= ((CORE_ADDR
) -1))
12177 best_low
= min (best_low
, current_low
);
12178 best_high
= max (best_high
, current_high
);
12186 child
= sibling_die (child
);
12191 *highpc
= best_high
;
12194 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12198 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12199 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12201 struct objfile
*objfile
= cu
->objfile
;
12202 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12203 struct attribute
*attr
;
12204 struct attribute
*attr_high
;
12206 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12209 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12212 CORE_ADDR low
= attr_value_as_address (attr
);
12213 CORE_ADDR high
= attr_value_as_address (attr_high
);
12215 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12218 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12219 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12220 record_block_range (block
, low
, high
- 1);
12224 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12227 bfd
*obfd
= objfile
->obfd
;
12228 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12229 We take advantage of the fact that DW_AT_ranges does not appear
12230 in DW_TAG_compile_unit of DWO files. */
12231 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12233 /* The value of the DW_AT_ranges attribute is the offset of the
12234 address range list in the .debug_ranges section. */
12235 unsigned long offset
= (DW_UNSND (attr
)
12236 + (need_ranges_base
? cu
->ranges_base
: 0));
12237 const gdb_byte
*buffer
;
12239 /* For some target architectures, but not others, the
12240 read_address function sign-extends the addresses it returns.
12241 To recognize base address selection entries, we need a
12243 unsigned int addr_size
= cu
->header
.addr_size
;
12244 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12246 /* The base address, to which the next pair is relative. Note
12247 that this 'base' is a DWARF concept: most entries in a range
12248 list are relative, to reduce the number of relocs against the
12249 debugging information. This is separate from this function's
12250 'baseaddr' argument, which GDB uses to relocate debugging
12251 information from a shared library based on the address at
12252 which the library was loaded. */
12253 CORE_ADDR base
= cu
->base_address
;
12254 int base_known
= cu
->base_known
;
12256 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12257 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12259 complaint (&symfile_complaints
,
12260 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12264 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12268 unsigned int bytes_read
;
12269 CORE_ADDR start
, end
;
12271 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12272 buffer
+= bytes_read
;
12273 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12274 buffer
+= bytes_read
;
12276 /* Did we find the end of the range list? */
12277 if (start
== 0 && end
== 0)
12280 /* Did we find a base address selection entry? */
12281 else if ((start
& base_select_mask
) == base_select_mask
)
12287 /* We found an ordinary address range. */
12292 complaint (&symfile_complaints
,
12293 _("Invalid .debug_ranges data "
12294 "(no base address)"));
12300 /* Inverted range entries are invalid. */
12301 complaint (&symfile_complaints
,
12302 _("Invalid .debug_ranges data "
12303 "(inverted range)"));
12307 /* Empty range entries have no effect. */
12311 start
+= base
+ baseaddr
;
12312 end
+= base
+ baseaddr
;
12314 /* A not-uncommon case of bad debug info.
12315 Don't pollute the addrmap with bad data. */
12316 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12318 complaint (&symfile_complaints
,
12319 _(".debug_ranges entry has start address of zero"
12320 " [in module %s]"), objfile_name (objfile
));
12324 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12325 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12326 record_block_range (block
, start
, end
- 1);
12332 /* Check whether the producer field indicates either of GCC < 4.6, or the
12333 Intel C/C++ compiler, and cache the result in CU. */
12336 check_producer (struct dwarf2_cu
*cu
)
12340 if (cu
->producer
== NULL
)
12342 /* For unknown compilers expect their behavior is DWARF version
12345 GCC started to support .debug_types sections by -gdwarf-4 since
12346 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12347 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12348 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12349 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12351 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12353 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12354 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12356 else if (startswith (cu
->producer
, "Intel(R) C"))
12357 cu
->producer_is_icc
= 1;
12360 /* For other non-GCC compilers, expect their behavior is DWARF version
12364 cu
->checked_producer
= 1;
12367 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12368 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12369 during 4.6.0 experimental. */
12372 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12374 if (!cu
->checked_producer
)
12375 check_producer (cu
);
12377 return cu
->producer_is_gxx_lt_4_6
;
12380 /* Return the default accessibility type if it is not overriden by
12381 DW_AT_accessibility. */
12383 static enum dwarf_access_attribute
12384 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12386 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12388 /* The default DWARF 2 accessibility for members is public, the default
12389 accessibility for inheritance is private. */
12391 if (die
->tag
!= DW_TAG_inheritance
)
12392 return DW_ACCESS_public
;
12394 return DW_ACCESS_private
;
12398 /* DWARF 3+ defines the default accessibility a different way. The same
12399 rules apply now for DW_TAG_inheritance as for the members and it only
12400 depends on the container kind. */
12402 if (die
->parent
->tag
== DW_TAG_class_type
)
12403 return DW_ACCESS_private
;
12405 return DW_ACCESS_public
;
12409 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12410 offset. If the attribute was not found return 0, otherwise return
12411 1. If it was found but could not properly be handled, set *OFFSET
12415 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12418 struct attribute
*attr
;
12420 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12425 /* Note that we do not check for a section offset first here.
12426 This is because DW_AT_data_member_location is new in DWARF 4,
12427 so if we see it, we can assume that a constant form is really
12428 a constant and not a section offset. */
12429 if (attr_form_is_constant (attr
))
12430 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12431 else if (attr_form_is_section_offset (attr
))
12432 dwarf2_complex_location_expr_complaint ();
12433 else if (attr_form_is_block (attr
))
12434 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12436 dwarf2_complex_location_expr_complaint ();
12444 /* Add an aggregate field to the field list. */
12447 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12448 struct dwarf2_cu
*cu
)
12450 struct objfile
*objfile
= cu
->objfile
;
12451 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12452 struct nextfield
*new_field
;
12453 struct attribute
*attr
;
12455 const char *fieldname
= "";
12457 /* Allocate a new field list entry and link it in. */
12458 new_field
= XNEW (struct nextfield
);
12459 make_cleanup (xfree
, new_field
);
12460 memset (new_field
, 0, sizeof (struct nextfield
));
12462 if (die
->tag
== DW_TAG_inheritance
)
12464 new_field
->next
= fip
->baseclasses
;
12465 fip
->baseclasses
= new_field
;
12469 new_field
->next
= fip
->fields
;
12470 fip
->fields
= new_field
;
12474 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12476 new_field
->accessibility
= DW_UNSND (attr
);
12478 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12479 if (new_field
->accessibility
!= DW_ACCESS_public
)
12480 fip
->non_public_fields
= 1;
12482 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12484 new_field
->virtuality
= DW_UNSND (attr
);
12486 new_field
->virtuality
= DW_VIRTUALITY_none
;
12488 fp
= &new_field
->field
;
12490 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12494 /* Data member other than a C++ static data member. */
12496 /* Get type of field. */
12497 fp
->type
= die_type (die
, cu
);
12499 SET_FIELD_BITPOS (*fp
, 0);
12501 /* Get bit size of field (zero if none). */
12502 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12505 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12509 FIELD_BITSIZE (*fp
) = 0;
12512 /* Get bit offset of field. */
12513 if (handle_data_member_location (die
, cu
, &offset
))
12514 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12515 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12518 if (gdbarch_bits_big_endian (gdbarch
))
12520 /* For big endian bits, the DW_AT_bit_offset gives the
12521 additional bit offset from the MSB of the containing
12522 anonymous object to the MSB of the field. We don't
12523 have to do anything special since we don't need to
12524 know the size of the anonymous object. */
12525 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12529 /* For little endian bits, compute the bit offset to the
12530 MSB of the anonymous object, subtract off the number of
12531 bits from the MSB of the field to the MSB of the
12532 object, and then subtract off the number of bits of
12533 the field itself. The result is the bit offset of
12534 the LSB of the field. */
12535 int anonymous_size
;
12536 int bit_offset
= DW_UNSND (attr
);
12538 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12541 /* The size of the anonymous object containing
12542 the bit field is explicit, so use the
12543 indicated size (in bytes). */
12544 anonymous_size
= DW_UNSND (attr
);
12548 /* The size of the anonymous object containing
12549 the bit field must be inferred from the type
12550 attribute of the data member containing the
12552 anonymous_size
= TYPE_LENGTH (fp
->type
);
12554 SET_FIELD_BITPOS (*fp
,
12555 (FIELD_BITPOS (*fp
)
12556 + anonymous_size
* bits_per_byte
12557 - bit_offset
- FIELD_BITSIZE (*fp
)));
12561 /* Get name of field. */
12562 fieldname
= dwarf2_name (die
, cu
);
12563 if (fieldname
== NULL
)
12566 /* The name is already allocated along with this objfile, so we don't
12567 need to duplicate it for the type. */
12568 fp
->name
= fieldname
;
12570 /* Change accessibility for artificial fields (e.g. virtual table
12571 pointer or virtual base class pointer) to private. */
12572 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12574 FIELD_ARTIFICIAL (*fp
) = 1;
12575 new_field
->accessibility
= DW_ACCESS_private
;
12576 fip
->non_public_fields
= 1;
12579 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12581 /* C++ static member. */
12583 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12584 is a declaration, but all versions of G++ as of this writing
12585 (so through at least 3.2.1) incorrectly generate
12586 DW_TAG_variable tags. */
12588 const char *physname
;
12590 /* Get name of field. */
12591 fieldname
= dwarf2_name (die
, cu
);
12592 if (fieldname
== NULL
)
12595 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12597 /* Only create a symbol if this is an external value.
12598 new_symbol checks this and puts the value in the global symbol
12599 table, which we want. If it is not external, new_symbol
12600 will try to put the value in cu->list_in_scope which is wrong. */
12601 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12603 /* A static const member, not much different than an enum as far as
12604 we're concerned, except that we can support more types. */
12605 new_symbol (die
, NULL
, cu
);
12608 /* Get physical name. */
12609 physname
= dwarf2_physname (fieldname
, die
, cu
);
12611 /* The name is already allocated along with this objfile, so we don't
12612 need to duplicate it for the type. */
12613 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12614 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12615 FIELD_NAME (*fp
) = fieldname
;
12617 else if (die
->tag
== DW_TAG_inheritance
)
12621 /* C++ base class field. */
12622 if (handle_data_member_location (die
, cu
, &offset
))
12623 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12624 FIELD_BITSIZE (*fp
) = 0;
12625 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12626 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12627 fip
->nbaseclasses
++;
12631 /* Add a typedef defined in the scope of the FIP's class. */
12634 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12635 struct dwarf2_cu
*cu
)
12637 struct typedef_field_list
*new_field
;
12638 struct typedef_field
*fp
;
12640 /* Allocate a new field list entry and link it in. */
12641 new_field
= XCNEW (struct typedef_field_list
);
12642 make_cleanup (xfree
, new_field
);
12644 gdb_assert (die
->tag
== DW_TAG_typedef
);
12646 fp
= &new_field
->field
;
12648 /* Get name of field. */
12649 fp
->name
= dwarf2_name (die
, cu
);
12650 if (fp
->name
== NULL
)
12653 fp
->type
= read_type_die (die
, cu
);
12655 new_field
->next
= fip
->typedef_field_list
;
12656 fip
->typedef_field_list
= new_field
;
12657 fip
->typedef_field_list_count
++;
12660 /* Create the vector of fields, and attach it to the type. */
12663 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12664 struct dwarf2_cu
*cu
)
12666 int nfields
= fip
->nfields
;
12668 /* Record the field count, allocate space for the array of fields,
12669 and create blank accessibility bitfields if necessary. */
12670 TYPE_NFIELDS (type
) = nfields
;
12671 TYPE_FIELDS (type
) = (struct field
*)
12672 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12673 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12675 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12677 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12679 TYPE_FIELD_PRIVATE_BITS (type
) =
12680 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12681 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12683 TYPE_FIELD_PROTECTED_BITS (type
) =
12684 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12685 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12687 TYPE_FIELD_IGNORE_BITS (type
) =
12688 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12689 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12692 /* If the type has baseclasses, allocate and clear a bit vector for
12693 TYPE_FIELD_VIRTUAL_BITS. */
12694 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12696 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12697 unsigned char *pointer
;
12699 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12700 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
12701 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12702 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12703 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12706 /* Copy the saved-up fields into the field vector. Start from the head of
12707 the list, adding to the tail of the field array, so that they end up in
12708 the same order in the array in which they were added to the list. */
12709 while (nfields
-- > 0)
12711 struct nextfield
*fieldp
;
12715 fieldp
= fip
->fields
;
12716 fip
->fields
= fieldp
->next
;
12720 fieldp
= fip
->baseclasses
;
12721 fip
->baseclasses
= fieldp
->next
;
12724 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12725 switch (fieldp
->accessibility
)
12727 case DW_ACCESS_private
:
12728 if (cu
->language
!= language_ada
)
12729 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12732 case DW_ACCESS_protected
:
12733 if (cu
->language
!= language_ada
)
12734 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12737 case DW_ACCESS_public
:
12741 /* Unknown accessibility. Complain and treat it as public. */
12743 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12744 fieldp
->accessibility
);
12748 if (nfields
< fip
->nbaseclasses
)
12750 switch (fieldp
->virtuality
)
12752 case DW_VIRTUALITY_virtual
:
12753 case DW_VIRTUALITY_pure_virtual
:
12754 if (cu
->language
== language_ada
)
12755 error (_("unexpected virtuality in component of Ada type"));
12756 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12763 /* Return true if this member function is a constructor, false
12767 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12769 const char *fieldname
;
12770 const char *type_name
;
12773 if (die
->parent
== NULL
)
12776 if (die
->parent
->tag
!= DW_TAG_structure_type
12777 && die
->parent
->tag
!= DW_TAG_union_type
12778 && die
->parent
->tag
!= DW_TAG_class_type
)
12781 fieldname
= dwarf2_name (die
, cu
);
12782 type_name
= dwarf2_name (die
->parent
, cu
);
12783 if (fieldname
== NULL
|| type_name
== NULL
)
12786 len
= strlen (fieldname
);
12787 return (strncmp (fieldname
, type_name
, len
) == 0
12788 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12791 /* Add a member function to the proper fieldlist. */
12794 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12795 struct type
*type
, struct dwarf2_cu
*cu
)
12797 struct objfile
*objfile
= cu
->objfile
;
12798 struct attribute
*attr
;
12799 struct fnfieldlist
*flp
;
12801 struct fn_field
*fnp
;
12802 const char *fieldname
;
12803 struct nextfnfield
*new_fnfield
;
12804 struct type
*this_type
;
12805 enum dwarf_access_attribute accessibility
;
12807 if (cu
->language
== language_ada
)
12808 error (_("unexpected member function in Ada type"));
12810 /* Get name of member function. */
12811 fieldname
= dwarf2_name (die
, cu
);
12812 if (fieldname
== NULL
)
12815 /* Look up member function name in fieldlist. */
12816 for (i
= 0; i
< fip
->nfnfields
; i
++)
12818 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12822 /* Create new list element if necessary. */
12823 if (i
< fip
->nfnfields
)
12824 flp
= &fip
->fnfieldlists
[i
];
12827 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12829 fip
->fnfieldlists
= (struct fnfieldlist
*)
12830 xrealloc (fip
->fnfieldlists
,
12831 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12832 * sizeof (struct fnfieldlist
));
12833 if (fip
->nfnfields
== 0)
12834 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12836 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12837 flp
->name
= fieldname
;
12840 i
= fip
->nfnfields
++;
12843 /* Create a new member function field and chain it to the field list
12845 new_fnfield
= XNEW (struct nextfnfield
);
12846 make_cleanup (xfree
, new_fnfield
);
12847 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12848 new_fnfield
->next
= flp
->head
;
12849 flp
->head
= new_fnfield
;
12852 /* Fill in the member function field info. */
12853 fnp
= &new_fnfield
->fnfield
;
12855 /* Delay processing of the physname until later. */
12856 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12858 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12863 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12864 fnp
->physname
= physname
? physname
: "";
12867 fnp
->type
= alloc_type (objfile
);
12868 this_type
= read_type_die (die
, cu
);
12869 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12871 int nparams
= TYPE_NFIELDS (this_type
);
12873 /* TYPE is the domain of this method, and THIS_TYPE is the type
12874 of the method itself (TYPE_CODE_METHOD). */
12875 smash_to_method_type (fnp
->type
, type
,
12876 TYPE_TARGET_TYPE (this_type
),
12877 TYPE_FIELDS (this_type
),
12878 TYPE_NFIELDS (this_type
),
12879 TYPE_VARARGS (this_type
));
12881 /* Handle static member functions.
12882 Dwarf2 has no clean way to discern C++ static and non-static
12883 member functions. G++ helps GDB by marking the first
12884 parameter for non-static member functions (which is the this
12885 pointer) as artificial. We obtain this information from
12886 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12887 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12888 fnp
->voffset
= VOFFSET_STATIC
;
12891 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12892 dwarf2_full_name (fieldname
, die
, cu
));
12894 /* Get fcontext from DW_AT_containing_type if present. */
12895 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12896 fnp
->fcontext
= die_containing_type (die
, cu
);
12898 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12899 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12901 /* Get accessibility. */
12902 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12904 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12906 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12907 switch (accessibility
)
12909 case DW_ACCESS_private
:
12910 fnp
->is_private
= 1;
12912 case DW_ACCESS_protected
:
12913 fnp
->is_protected
= 1;
12917 /* Check for artificial methods. */
12918 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12919 if (attr
&& DW_UNSND (attr
) != 0)
12920 fnp
->is_artificial
= 1;
12922 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12924 /* Get index in virtual function table if it is a virtual member
12925 function. For older versions of GCC, this is an offset in the
12926 appropriate virtual table, as specified by DW_AT_containing_type.
12927 For everyone else, it is an expression to be evaluated relative
12928 to the object address. */
12930 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12933 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12935 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12937 /* Old-style GCC. */
12938 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12940 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12941 || (DW_BLOCK (attr
)->size
> 1
12942 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12943 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12945 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12946 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12947 dwarf2_complex_location_expr_complaint ();
12949 fnp
->voffset
/= cu
->header
.addr_size
;
12953 dwarf2_complex_location_expr_complaint ();
12955 if (!fnp
->fcontext
)
12957 /* If there is no `this' field and no DW_AT_containing_type,
12958 we cannot actually find a base class context for the
12960 if (TYPE_NFIELDS (this_type
) == 0
12961 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12963 complaint (&symfile_complaints
,
12964 _("cannot determine context for virtual member "
12965 "function \"%s\" (offset %d)"),
12966 fieldname
, die
->offset
.sect_off
);
12971 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12975 else if (attr_form_is_section_offset (attr
))
12977 dwarf2_complex_location_expr_complaint ();
12981 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12987 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12988 if (attr
&& DW_UNSND (attr
))
12990 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12991 complaint (&symfile_complaints
,
12992 _("Member function \"%s\" (offset %d) is virtual "
12993 "but the vtable offset is not specified"),
12994 fieldname
, die
->offset
.sect_off
);
12995 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12996 TYPE_CPLUS_DYNAMIC (type
) = 1;
13001 /* Create the vector of member function fields, and attach it to the type. */
13004 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13005 struct dwarf2_cu
*cu
)
13007 struct fnfieldlist
*flp
;
13010 if (cu
->language
== language_ada
)
13011 error (_("unexpected member functions in Ada type"));
13013 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13014 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13015 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13017 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13019 struct nextfnfield
*nfp
= flp
->head
;
13020 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13023 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13024 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13025 fn_flp
->fn_fields
= (struct fn_field
*)
13026 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13027 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13028 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13031 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13034 /* Returns non-zero if NAME is the name of a vtable member in CU's
13035 language, zero otherwise. */
13037 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13039 static const char vptr
[] = "_vptr";
13040 static const char vtable
[] = "vtable";
13042 /* Look for the C++ and Java forms of the vtable. */
13043 if ((cu
->language
== language_java
13044 && startswith (name
, vtable
))
13045 || (startswith (name
, vptr
)
13046 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13052 /* GCC outputs unnamed structures that are really pointers to member
13053 functions, with the ABI-specified layout. If TYPE describes
13054 such a structure, smash it into a member function type.
13056 GCC shouldn't do this; it should just output pointer to member DIEs.
13057 This is GCC PR debug/28767. */
13060 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13062 struct type
*pfn_type
, *self_type
, *new_type
;
13064 /* Check for a structure with no name and two children. */
13065 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13068 /* Check for __pfn and __delta members. */
13069 if (TYPE_FIELD_NAME (type
, 0) == NULL
13070 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13071 || TYPE_FIELD_NAME (type
, 1) == NULL
13072 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13075 /* Find the type of the method. */
13076 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13077 if (pfn_type
== NULL
13078 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13079 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13082 /* Look for the "this" argument. */
13083 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13084 if (TYPE_NFIELDS (pfn_type
) == 0
13085 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13086 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13089 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13090 new_type
= alloc_type (objfile
);
13091 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13092 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13093 TYPE_VARARGS (pfn_type
));
13094 smash_to_methodptr_type (type
, new_type
);
13097 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13101 producer_is_icc (struct dwarf2_cu
*cu
)
13103 if (!cu
->checked_producer
)
13104 check_producer (cu
);
13106 return cu
->producer_is_icc
;
13109 /* Called when we find the DIE that starts a structure or union scope
13110 (definition) to create a type for the structure or union. Fill in
13111 the type's name and general properties; the members will not be
13112 processed until process_structure_scope. A symbol table entry for
13113 the type will also not be done until process_structure_scope (assuming
13114 the type has a name).
13116 NOTE: we need to call these functions regardless of whether or not the
13117 DIE has a DW_AT_name attribute, since it might be an anonymous
13118 structure or union. This gets the type entered into our set of
13119 user defined types. */
13121 static struct type
*
13122 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13124 struct objfile
*objfile
= cu
->objfile
;
13126 struct attribute
*attr
;
13129 /* If the definition of this type lives in .debug_types, read that type.
13130 Don't follow DW_AT_specification though, that will take us back up
13131 the chain and we want to go down. */
13132 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13135 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13137 /* The type's CU may not be the same as CU.
13138 Ensure TYPE is recorded with CU in die_type_hash. */
13139 return set_die_type (die
, type
, cu
);
13142 type
= alloc_type (objfile
);
13143 INIT_CPLUS_SPECIFIC (type
);
13145 name
= dwarf2_name (die
, cu
);
13148 if (cu
->language
== language_cplus
13149 || cu
->language
== language_java
13150 || cu
->language
== language_d
)
13152 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13154 /* dwarf2_full_name might have already finished building the DIE's
13155 type. If so, there is no need to continue. */
13156 if (get_die_type (die
, cu
) != NULL
)
13157 return get_die_type (die
, cu
);
13159 TYPE_TAG_NAME (type
) = full_name
;
13160 if (die
->tag
== DW_TAG_structure_type
13161 || die
->tag
== DW_TAG_class_type
)
13162 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13166 /* The name is already allocated along with this objfile, so
13167 we don't need to duplicate it for the type. */
13168 TYPE_TAG_NAME (type
) = name
;
13169 if (die
->tag
== DW_TAG_class_type
)
13170 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13174 if (die
->tag
== DW_TAG_structure_type
)
13176 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13178 else if (die
->tag
== DW_TAG_union_type
)
13180 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13184 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13187 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13188 TYPE_DECLARED_CLASS (type
) = 1;
13190 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13193 if (attr_form_is_constant (attr
))
13194 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13197 /* For the moment, dynamic type sizes are not supported
13198 by GDB's struct type. The actual size is determined
13199 on-demand when resolving the type of a given object,
13200 so set the type's length to zero for now. Otherwise,
13201 we record an expression as the length, and that expression
13202 could lead to a very large value, which could eventually
13203 lead to us trying to allocate that much memory when creating
13204 a value of that type. */
13205 TYPE_LENGTH (type
) = 0;
13210 TYPE_LENGTH (type
) = 0;
13213 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13215 /* ICC does not output the required DW_AT_declaration
13216 on incomplete types, but gives them a size of zero. */
13217 TYPE_STUB (type
) = 1;
13220 TYPE_STUB_SUPPORTED (type
) = 1;
13222 if (die_is_declaration (die
, cu
))
13223 TYPE_STUB (type
) = 1;
13224 else if (attr
== NULL
&& die
->child
== NULL
13225 && producer_is_realview (cu
->producer
))
13226 /* RealView does not output the required DW_AT_declaration
13227 on incomplete types. */
13228 TYPE_STUB (type
) = 1;
13230 /* We need to add the type field to the die immediately so we don't
13231 infinitely recurse when dealing with pointers to the structure
13232 type within the structure itself. */
13233 set_die_type (die
, type
, cu
);
13235 /* set_die_type should be already done. */
13236 set_descriptive_type (type
, die
, cu
);
13241 /* Finish creating a structure or union type, including filling in
13242 its members and creating a symbol for it. */
13245 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13247 struct objfile
*objfile
= cu
->objfile
;
13248 struct die_info
*child_die
;
13251 type
= get_die_type (die
, cu
);
13253 type
= read_structure_type (die
, cu
);
13255 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13257 struct field_info fi
;
13258 VEC (symbolp
) *template_args
= NULL
;
13259 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13261 memset (&fi
, 0, sizeof (struct field_info
));
13263 child_die
= die
->child
;
13265 while (child_die
&& child_die
->tag
)
13267 if (child_die
->tag
== DW_TAG_member
13268 || child_die
->tag
== DW_TAG_variable
)
13270 /* NOTE: carlton/2002-11-05: A C++ static data member
13271 should be a DW_TAG_member that is a declaration, but
13272 all versions of G++ as of this writing (so through at
13273 least 3.2.1) incorrectly generate DW_TAG_variable
13274 tags for them instead. */
13275 dwarf2_add_field (&fi
, child_die
, cu
);
13277 else if (child_die
->tag
== DW_TAG_subprogram
)
13279 /* C++ member function. */
13280 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13282 else if (child_die
->tag
== DW_TAG_inheritance
)
13284 /* C++ base class field. */
13285 dwarf2_add_field (&fi
, child_die
, cu
);
13287 else if (child_die
->tag
== DW_TAG_typedef
)
13288 dwarf2_add_typedef (&fi
, child_die
, cu
);
13289 else if (child_die
->tag
== DW_TAG_template_type_param
13290 || child_die
->tag
== DW_TAG_template_value_param
)
13292 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13295 VEC_safe_push (symbolp
, template_args
, arg
);
13298 child_die
= sibling_die (child_die
);
13301 /* Attach template arguments to type. */
13302 if (! VEC_empty (symbolp
, template_args
))
13304 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13305 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13306 = VEC_length (symbolp
, template_args
);
13307 TYPE_TEMPLATE_ARGUMENTS (type
)
13308 = XOBNEWVEC (&objfile
->objfile_obstack
,
13310 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13311 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13312 VEC_address (symbolp
, template_args
),
13313 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13314 * sizeof (struct symbol
*)));
13315 VEC_free (symbolp
, template_args
);
13318 /* Attach fields and member functions to the type. */
13320 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13323 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13325 /* Get the type which refers to the base class (possibly this
13326 class itself) which contains the vtable pointer for the current
13327 class from the DW_AT_containing_type attribute. This use of
13328 DW_AT_containing_type is a GNU extension. */
13330 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13332 struct type
*t
= die_containing_type (die
, cu
);
13334 set_type_vptr_basetype (type
, t
);
13339 /* Our own class provides vtbl ptr. */
13340 for (i
= TYPE_NFIELDS (t
) - 1;
13341 i
>= TYPE_N_BASECLASSES (t
);
13344 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13346 if (is_vtable_name (fieldname
, cu
))
13348 set_type_vptr_fieldno (type
, i
);
13353 /* Complain if virtual function table field not found. */
13354 if (i
< TYPE_N_BASECLASSES (t
))
13355 complaint (&symfile_complaints
,
13356 _("virtual function table pointer "
13357 "not found when defining class '%s'"),
13358 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13363 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13366 else if (cu
->producer
13367 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13369 /* The IBM XLC compiler does not provide direct indication
13370 of the containing type, but the vtable pointer is
13371 always named __vfp. */
13375 for (i
= TYPE_NFIELDS (type
) - 1;
13376 i
>= TYPE_N_BASECLASSES (type
);
13379 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13381 set_type_vptr_fieldno (type
, i
);
13382 set_type_vptr_basetype (type
, type
);
13389 /* Copy fi.typedef_field_list linked list elements content into the
13390 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13391 if (fi
.typedef_field_list
)
13393 int i
= fi
.typedef_field_list_count
;
13395 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13396 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13397 = ((struct typedef_field
*)
13398 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13399 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13401 /* Reverse the list order to keep the debug info elements order. */
13404 struct typedef_field
*dest
, *src
;
13406 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13407 src
= &fi
.typedef_field_list
->field
;
13408 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13413 do_cleanups (back_to
);
13415 if (HAVE_CPLUS_STRUCT (type
))
13416 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13419 quirk_gcc_member_function_pointer (type
, objfile
);
13421 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13422 snapshots) has been known to create a die giving a declaration
13423 for a class that has, as a child, a die giving a definition for a
13424 nested class. So we have to process our children even if the
13425 current die is a declaration. Normally, of course, a declaration
13426 won't have any children at all. */
13428 child_die
= die
->child
;
13430 while (child_die
!= NULL
&& child_die
->tag
)
13432 if (child_die
->tag
== DW_TAG_member
13433 || child_die
->tag
== DW_TAG_variable
13434 || child_die
->tag
== DW_TAG_inheritance
13435 || child_die
->tag
== DW_TAG_template_value_param
13436 || child_die
->tag
== DW_TAG_template_type_param
)
13441 process_die (child_die
, cu
);
13443 child_die
= sibling_die (child_die
);
13446 /* Do not consider external references. According to the DWARF standard,
13447 these DIEs are identified by the fact that they have no byte_size
13448 attribute, and a declaration attribute. */
13449 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13450 || !die_is_declaration (die
, cu
))
13451 new_symbol (die
, type
, cu
);
13454 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13455 update TYPE using some information only available in DIE's children. */
13458 update_enumeration_type_from_children (struct die_info
*die
,
13460 struct dwarf2_cu
*cu
)
13462 struct obstack obstack
;
13463 struct die_info
*child_die
;
13464 int unsigned_enum
= 1;
13467 struct cleanup
*old_chain
;
13469 obstack_init (&obstack
);
13470 old_chain
= make_cleanup_obstack_free (&obstack
);
13472 for (child_die
= die
->child
;
13473 child_die
!= NULL
&& child_die
->tag
;
13474 child_die
= sibling_die (child_die
))
13476 struct attribute
*attr
;
13478 const gdb_byte
*bytes
;
13479 struct dwarf2_locexpr_baton
*baton
;
13482 if (child_die
->tag
!= DW_TAG_enumerator
)
13485 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13489 name
= dwarf2_name (child_die
, cu
);
13491 name
= "<anonymous enumerator>";
13493 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13494 &value
, &bytes
, &baton
);
13500 else if ((mask
& value
) != 0)
13505 /* If we already know that the enum type is neither unsigned, nor
13506 a flag type, no need to look at the rest of the enumerates. */
13507 if (!unsigned_enum
&& !flag_enum
)
13512 TYPE_UNSIGNED (type
) = 1;
13514 TYPE_FLAG_ENUM (type
) = 1;
13516 do_cleanups (old_chain
);
13519 /* Given a DW_AT_enumeration_type die, set its type. We do not
13520 complete the type's fields yet, or create any symbols. */
13522 static struct type
*
13523 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13525 struct objfile
*objfile
= cu
->objfile
;
13527 struct attribute
*attr
;
13530 /* If the definition of this type lives in .debug_types, read that type.
13531 Don't follow DW_AT_specification though, that will take us back up
13532 the chain and we want to go down. */
13533 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13536 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13538 /* The type's CU may not be the same as CU.
13539 Ensure TYPE is recorded with CU in die_type_hash. */
13540 return set_die_type (die
, type
, cu
);
13543 type
= alloc_type (objfile
);
13545 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13546 name
= dwarf2_full_name (NULL
, die
, cu
);
13548 TYPE_TAG_NAME (type
) = name
;
13550 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13553 struct type
*underlying_type
= die_type (die
, cu
);
13555 TYPE_TARGET_TYPE (type
) = underlying_type
;
13558 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13561 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13565 TYPE_LENGTH (type
) = 0;
13568 /* The enumeration DIE can be incomplete. In Ada, any type can be
13569 declared as private in the package spec, and then defined only
13570 inside the package body. Such types are known as Taft Amendment
13571 Types. When another package uses such a type, an incomplete DIE
13572 may be generated by the compiler. */
13573 if (die_is_declaration (die
, cu
))
13574 TYPE_STUB (type
) = 1;
13576 /* Finish the creation of this type by using the enum's children.
13577 We must call this even when the underlying type has been provided
13578 so that we can determine if we're looking at a "flag" enum. */
13579 update_enumeration_type_from_children (die
, type
, cu
);
13581 /* If this type has an underlying type that is not a stub, then we
13582 may use its attributes. We always use the "unsigned" attribute
13583 in this situation, because ordinarily we guess whether the type
13584 is unsigned -- but the guess can be wrong and the underlying type
13585 can tell us the reality. However, we defer to a local size
13586 attribute if one exists, because this lets the compiler override
13587 the underlying type if needed. */
13588 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13590 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13591 if (TYPE_LENGTH (type
) == 0)
13592 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13595 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13597 return set_die_type (die
, type
, cu
);
13600 /* Given a pointer to a die which begins an enumeration, process all
13601 the dies that define the members of the enumeration, and create the
13602 symbol for the enumeration type.
13604 NOTE: We reverse the order of the element list. */
13607 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13609 struct type
*this_type
;
13611 this_type
= get_die_type (die
, cu
);
13612 if (this_type
== NULL
)
13613 this_type
= read_enumeration_type (die
, cu
);
13615 if (die
->child
!= NULL
)
13617 struct die_info
*child_die
;
13618 struct symbol
*sym
;
13619 struct field
*fields
= NULL
;
13620 int num_fields
= 0;
13623 child_die
= die
->child
;
13624 while (child_die
&& child_die
->tag
)
13626 if (child_die
->tag
!= DW_TAG_enumerator
)
13628 process_die (child_die
, cu
);
13632 name
= dwarf2_name (child_die
, cu
);
13635 sym
= new_symbol (child_die
, this_type
, cu
);
13637 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13639 fields
= (struct field
*)
13641 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13642 * sizeof (struct field
));
13645 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13646 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13647 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13648 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13654 child_die
= sibling_die (child_die
);
13659 TYPE_NFIELDS (this_type
) = num_fields
;
13660 TYPE_FIELDS (this_type
) = (struct field
*)
13661 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13662 memcpy (TYPE_FIELDS (this_type
), fields
,
13663 sizeof (struct field
) * num_fields
);
13668 /* If we are reading an enum from a .debug_types unit, and the enum
13669 is a declaration, and the enum is not the signatured type in the
13670 unit, then we do not want to add a symbol for it. Adding a
13671 symbol would in some cases obscure the true definition of the
13672 enum, giving users an incomplete type when the definition is
13673 actually available. Note that we do not want to do this for all
13674 enums which are just declarations, because C++0x allows forward
13675 enum declarations. */
13676 if (cu
->per_cu
->is_debug_types
13677 && die_is_declaration (die
, cu
))
13679 struct signatured_type
*sig_type
;
13681 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13682 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13683 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13687 new_symbol (die
, this_type
, cu
);
13690 /* Extract all information from a DW_TAG_array_type DIE and put it in
13691 the DIE's type field. For now, this only handles one dimensional
13694 static struct type
*
13695 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13697 struct objfile
*objfile
= cu
->objfile
;
13698 struct die_info
*child_die
;
13700 struct type
*element_type
, *range_type
, *index_type
;
13701 struct type
**range_types
= NULL
;
13702 struct attribute
*attr
;
13704 struct cleanup
*back_to
;
13706 unsigned int bit_stride
= 0;
13708 element_type
= die_type (die
, cu
);
13710 /* The die_type call above may have already set the type for this DIE. */
13711 type
= get_die_type (die
, cu
);
13715 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13717 bit_stride
= DW_UNSND (attr
) * 8;
13719 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13721 bit_stride
= DW_UNSND (attr
);
13723 /* Irix 6.2 native cc creates array types without children for
13724 arrays with unspecified length. */
13725 if (die
->child
== NULL
)
13727 index_type
= objfile_type (objfile
)->builtin_int
;
13728 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13729 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13731 return set_die_type (die
, type
, cu
);
13734 back_to
= make_cleanup (null_cleanup
, NULL
);
13735 child_die
= die
->child
;
13736 while (child_die
&& child_die
->tag
)
13738 if (child_die
->tag
== DW_TAG_subrange_type
)
13740 struct type
*child_type
= read_type_die (child_die
, cu
);
13742 if (child_type
!= NULL
)
13744 /* The range type was succesfully read. Save it for the
13745 array type creation. */
13746 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13748 range_types
= (struct type
**)
13749 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13750 * sizeof (struct type
*));
13752 make_cleanup (free_current_contents
, &range_types
);
13754 range_types
[ndim
++] = child_type
;
13757 child_die
= sibling_die (child_die
);
13760 /* Dwarf2 dimensions are output from left to right, create the
13761 necessary array types in backwards order. */
13763 type
= element_type
;
13765 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13770 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13776 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13780 /* Understand Dwarf2 support for vector types (like they occur on
13781 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13782 array type. This is not part of the Dwarf2/3 standard yet, but a
13783 custom vendor extension. The main difference between a regular
13784 array and the vector variant is that vectors are passed by value
13786 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13788 make_vector_type (type
);
13790 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13791 implementation may choose to implement triple vectors using this
13793 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13796 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13797 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13799 complaint (&symfile_complaints
,
13800 _("DW_AT_byte_size for array type smaller "
13801 "than the total size of elements"));
13804 name
= dwarf2_name (die
, cu
);
13806 TYPE_NAME (type
) = name
;
13808 /* Install the type in the die. */
13809 set_die_type (die
, type
, cu
);
13811 /* set_die_type should be already done. */
13812 set_descriptive_type (type
, die
, cu
);
13814 do_cleanups (back_to
);
13819 static enum dwarf_array_dim_ordering
13820 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13822 struct attribute
*attr
;
13824 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13827 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13829 /* GNU F77 is a special case, as at 08/2004 array type info is the
13830 opposite order to the dwarf2 specification, but data is still
13831 laid out as per normal fortran.
13833 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13834 version checking. */
13836 if (cu
->language
== language_fortran
13837 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13839 return DW_ORD_row_major
;
13842 switch (cu
->language_defn
->la_array_ordering
)
13844 case array_column_major
:
13845 return DW_ORD_col_major
;
13846 case array_row_major
:
13848 return DW_ORD_row_major
;
13852 /* Extract all information from a DW_TAG_set_type DIE and put it in
13853 the DIE's type field. */
13855 static struct type
*
13856 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13858 struct type
*domain_type
, *set_type
;
13859 struct attribute
*attr
;
13861 domain_type
= die_type (die
, cu
);
13863 /* The die_type call above may have already set the type for this DIE. */
13864 set_type
= get_die_type (die
, cu
);
13868 set_type
= create_set_type (NULL
, domain_type
);
13870 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13872 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13874 return set_die_type (die
, set_type
, cu
);
13877 /* A helper for read_common_block that creates a locexpr baton.
13878 SYM is the symbol which we are marking as computed.
13879 COMMON_DIE is the DIE for the common block.
13880 COMMON_LOC is the location expression attribute for the common
13882 MEMBER_LOC is the location expression attribute for the particular
13883 member of the common block that we are processing.
13884 CU is the CU from which the above come. */
13887 mark_common_block_symbol_computed (struct symbol
*sym
,
13888 struct die_info
*common_die
,
13889 struct attribute
*common_loc
,
13890 struct attribute
*member_loc
,
13891 struct dwarf2_cu
*cu
)
13893 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13894 struct dwarf2_locexpr_baton
*baton
;
13896 unsigned int cu_off
;
13897 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13898 LONGEST offset
= 0;
13900 gdb_assert (common_loc
&& member_loc
);
13901 gdb_assert (attr_form_is_block (common_loc
));
13902 gdb_assert (attr_form_is_block (member_loc
)
13903 || attr_form_is_constant (member_loc
));
13905 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13906 baton
->per_cu
= cu
->per_cu
;
13907 gdb_assert (baton
->per_cu
);
13909 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13911 if (attr_form_is_constant (member_loc
))
13913 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13914 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13917 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13919 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13922 *ptr
++ = DW_OP_call4
;
13923 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13924 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13927 if (attr_form_is_constant (member_loc
))
13929 *ptr
++ = DW_OP_addr
;
13930 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13931 ptr
+= cu
->header
.addr_size
;
13935 /* We have to copy the data here, because DW_OP_call4 will only
13936 use a DW_AT_location attribute. */
13937 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13938 ptr
+= DW_BLOCK (member_loc
)->size
;
13941 *ptr
++ = DW_OP_plus
;
13942 gdb_assert (ptr
- baton
->data
== baton
->size
);
13944 SYMBOL_LOCATION_BATON (sym
) = baton
;
13945 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13948 /* Create appropriate locally-scoped variables for all the
13949 DW_TAG_common_block entries. Also create a struct common_block
13950 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13951 is used to sepate the common blocks name namespace from regular
13955 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13957 struct attribute
*attr
;
13959 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13962 /* Support the .debug_loc offsets. */
13963 if (attr_form_is_block (attr
))
13967 else if (attr_form_is_section_offset (attr
))
13969 dwarf2_complex_location_expr_complaint ();
13974 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13975 "common block member");
13980 if (die
->child
!= NULL
)
13982 struct objfile
*objfile
= cu
->objfile
;
13983 struct die_info
*child_die
;
13984 size_t n_entries
= 0, size
;
13985 struct common_block
*common_block
;
13986 struct symbol
*sym
;
13988 for (child_die
= die
->child
;
13989 child_die
&& child_die
->tag
;
13990 child_die
= sibling_die (child_die
))
13993 size
= (sizeof (struct common_block
)
13994 + (n_entries
- 1) * sizeof (struct symbol
*));
13996 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
13998 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13999 common_block
->n_entries
= 0;
14001 for (child_die
= die
->child
;
14002 child_die
&& child_die
->tag
;
14003 child_die
= sibling_die (child_die
))
14005 /* Create the symbol in the DW_TAG_common_block block in the current
14007 sym
= new_symbol (child_die
, NULL
, cu
);
14010 struct attribute
*member_loc
;
14012 common_block
->contents
[common_block
->n_entries
++] = sym
;
14014 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14018 /* GDB has handled this for a long time, but it is
14019 not specified by DWARF. It seems to have been
14020 emitted by gfortran at least as recently as:
14021 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14022 complaint (&symfile_complaints
,
14023 _("Variable in common block has "
14024 "DW_AT_data_member_location "
14025 "- DIE at 0x%x [in module %s]"),
14026 child_die
->offset
.sect_off
,
14027 objfile_name (cu
->objfile
));
14029 if (attr_form_is_section_offset (member_loc
))
14030 dwarf2_complex_location_expr_complaint ();
14031 else if (attr_form_is_constant (member_loc
)
14032 || attr_form_is_block (member_loc
))
14035 mark_common_block_symbol_computed (sym
, die
, attr
,
14039 dwarf2_complex_location_expr_complaint ();
14044 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14045 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14049 /* Create a type for a C++ namespace. */
14051 static struct type
*
14052 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14054 struct objfile
*objfile
= cu
->objfile
;
14055 const char *previous_prefix
, *name
;
14059 /* For extensions, reuse the type of the original namespace. */
14060 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14062 struct die_info
*ext_die
;
14063 struct dwarf2_cu
*ext_cu
= cu
;
14065 ext_die
= dwarf2_extension (die
, &ext_cu
);
14066 type
= read_type_die (ext_die
, ext_cu
);
14068 /* EXT_CU may not be the same as CU.
14069 Ensure TYPE is recorded with CU in die_type_hash. */
14070 return set_die_type (die
, type
, cu
);
14073 name
= namespace_name (die
, &is_anonymous
, cu
);
14075 /* Now build the name of the current namespace. */
14077 previous_prefix
= determine_prefix (die
, cu
);
14078 if (previous_prefix
[0] != '\0')
14079 name
= typename_concat (&objfile
->objfile_obstack
,
14080 previous_prefix
, name
, 0, cu
);
14082 /* Create the type. */
14083 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14085 TYPE_NAME (type
) = name
;
14086 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14088 return set_die_type (die
, type
, cu
);
14091 /* Read a namespace scope. */
14094 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14096 struct objfile
*objfile
= cu
->objfile
;
14099 /* Add a symbol associated to this if we haven't seen the namespace
14100 before. Also, add a using directive if it's an anonymous
14103 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14107 type
= read_type_die (die
, cu
);
14108 new_symbol (die
, type
, cu
);
14110 namespace_name (die
, &is_anonymous
, cu
);
14113 const char *previous_prefix
= determine_prefix (die
, cu
);
14115 add_using_directive (using_directives (cu
->language
),
14116 previous_prefix
, TYPE_NAME (type
), NULL
,
14117 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14121 if (die
->child
!= NULL
)
14123 struct die_info
*child_die
= die
->child
;
14125 while (child_die
&& child_die
->tag
)
14127 process_die (child_die
, cu
);
14128 child_die
= sibling_die (child_die
);
14133 /* Read a Fortran module as type. This DIE can be only a declaration used for
14134 imported module. Still we need that type as local Fortran "use ... only"
14135 declaration imports depend on the created type in determine_prefix. */
14137 static struct type
*
14138 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14140 struct objfile
*objfile
= cu
->objfile
;
14141 const char *module_name
;
14144 module_name
= dwarf2_name (die
, cu
);
14146 complaint (&symfile_complaints
,
14147 _("DW_TAG_module has no name, offset 0x%x"),
14148 die
->offset
.sect_off
);
14149 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14151 /* determine_prefix uses TYPE_TAG_NAME. */
14152 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14154 return set_die_type (die
, type
, cu
);
14157 /* Read a Fortran module. */
14160 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14162 struct die_info
*child_die
= die
->child
;
14165 type
= read_type_die (die
, cu
);
14166 new_symbol (die
, type
, cu
);
14168 while (child_die
&& child_die
->tag
)
14170 process_die (child_die
, cu
);
14171 child_die
= sibling_die (child_die
);
14175 /* Return the name of the namespace represented by DIE. Set
14176 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14179 static const char *
14180 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14182 struct die_info
*current_die
;
14183 const char *name
= NULL
;
14185 /* Loop through the extensions until we find a name. */
14187 for (current_die
= die
;
14188 current_die
!= NULL
;
14189 current_die
= dwarf2_extension (die
, &cu
))
14191 /* We don't use dwarf2_name here so that we can detect the absence
14192 of a name -> anonymous namespace. */
14193 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14199 /* Is it an anonymous namespace? */
14201 *is_anonymous
= (name
== NULL
);
14203 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14208 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14209 the user defined type vector. */
14211 static struct type
*
14212 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14214 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14215 struct comp_unit_head
*cu_header
= &cu
->header
;
14217 struct attribute
*attr_byte_size
;
14218 struct attribute
*attr_address_class
;
14219 int byte_size
, addr_class
;
14220 struct type
*target_type
;
14222 target_type
= die_type (die
, cu
);
14224 /* The die_type call above may have already set the type for this DIE. */
14225 type
= get_die_type (die
, cu
);
14229 type
= lookup_pointer_type (target_type
);
14231 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14232 if (attr_byte_size
)
14233 byte_size
= DW_UNSND (attr_byte_size
);
14235 byte_size
= cu_header
->addr_size
;
14237 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14238 if (attr_address_class
)
14239 addr_class
= DW_UNSND (attr_address_class
);
14241 addr_class
= DW_ADDR_none
;
14243 /* If the pointer size or address class is different than the
14244 default, create a type variant marked as such and set the
14245 length accordingly. */
14246 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14248 if (gdbarch_address_class_type_flags_p (gdbarch
))
14252 type_flags
= gdbarch_address_class_type_flags
14253 (gdbarch
, byte_size
, addr_class
);
14254 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14256 type
= make_type_with_address_space (type
, type_flags
);
14258 else if (TYPE_LENGTH (type
) != byte_size
)
14260 complaint (&symfile_complaints
,
14261 _("invalid pointer size %d"), byte_size
);
14265 /* Should we also complain about unhandled address classes? */
14269 TYPE_LENGTH (type
) = byte_size
;
14270 return set_die_type (die
, type
, cu
);
14273 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14274 the user defined type vector. */
14276 static struct type
*
14277 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14280 struct type
*to_type
;
14281 struct type
*domain
;
14283 to_type
= die_type (die
, cu
);
14284 domain
= die_containing_type (die
, cu
);
14286 /* The calls above may have already set the type for this DIE. */
14287 type
= get_die_type (die
, cu
);
14291 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14292 type
= lookup_methodptr_type (to_type
);
14293 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14295 struct type
*new_type
= alloc_type (cu
->objfile
);
14297 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14298 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14299 TYPE_VARARGS (to_type
));
14300 type
= lookup_methodptr_type (new_type
);
14303 type
= lookup_memberptr_type (to_type
, domain
);
14305 return set_die_type (die
, type
, cu
);
14308 /* Extract all information from a DW_TAG_reference_type DIE and add to
14309 the user defined type vector. */
14311 static struct type
*
14312 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14314 struct comp_unit_head
*cu_header
= &cu
->header
;
14315 struct type
*type
, *target_type
;
14316 struct attribute
*attr
;
14318 target_type
= die_type (die
, cu
);
14320 /* The die_type call above may have already set the type for this DIE. */
14321 type
= get_die_type (die
, cu
);
14325 type
= lookup_reference_type (target_type
);
14326 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14329 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14333 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14335 return set_die_type (die
, type
, cu
);
14338 /* Add the given cv-qualifiers to the element type of the array. GCC
14339 outputs DWARF type qualifiers that apply to an array, not the
14340 element type. But GDB relies on the array element type to carry
14341 the cv-qualifiers. This mimics section 6.7.3 of the C99
14344 static struct type
*
14345 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14346 struct type
*base_type
, int cnst
, int voltl
)
14348 struct type
*el_type
, *inner_array
;
14350 base_type
= copy_type (base_type
);
14351 inner_array
= base_type
;
14353 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14355 TYPE_TARGET_TYPE (inner_array
) =
14356 copy_type (TYPE_TARGET_TYPE (inner_array
));
14357 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14360 el_type
= TYPE_TARGET_TYPE (inner_array
);
14361 cnst
|= TYPE_CONST (el_type
);
14362 voltl
|= TYPE_VOLATILE (el_type
);
14363 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14365 return set_die_type (die
, base_type
, cu
);
14368 static struct type
*
14369 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14371 struct type
*base_type
, *cv_type
;
14373 base_type
= die_type (die
, cu
);
14375 /* The die_type call above may have already set the type for this DIE. */
14376 cv_type
= get_die_type (die
, cu
);
14380 /* In case the const qualifier is applied to an array type, the element type
14381 is so qualified, not the array type (section 6.7.3 of C99). */
14382 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14383 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14385 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14386 return set_die_type (die
, cv_type
, cu
);
14389 static struct type
*
14390 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14392 struct type
*base_type
, *cv_type
;
14394 base_type
= die_type (die
, cu
);
14396 /* The die_type call above may have already set the type for this DIE. */
14397 cv_type
= get_die_type (die
, cu
);
14401 /* In case the volatile qualifier is applied to an array type, the
14402 element type is so qualified, not the array type (section 6.7.3
14404 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14405 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14407 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14408 return set_die_type (die
, cv_type
, cu
);
14411 /* Handle DW_TAG_restrict_type. */
14413 static struct type
*
14414 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14416 struct type
*base_type
, *cv_type
;
14418 base_type
= die_type (die
, cu
);
14420 /* The die_type call above may have already set the type for this DIE. */
14421 cv_type
= get_die_type (die
, cu
);
14425 cv_type
= make_restrict_type (base_type
);
14426 return set_die_type (die
, cv_type
, cu
);
14429 /* Handle DW_TAG_atomic_type. */
14431 static struct type
*
14432 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14434 struct type
*base_type
, *cv_type
;
14436 base_type
= die_type (die
, cu
);
14438 /* The die_type call above may have already set the type for this DIE. */
14439 cv_type
= get_die_type (die
, cu
);
14443 cv_type
= make_atomic_type (base_type
);
14444 return set_die_type (die
, cv_type
, cu
);
14447 /* Extract all information from a DW_TAG_string_type DIE and add to
14448 the user defined type vector. It isn't really a user defined type,
14449 but it behaves like one, with other DIE's using an AT_user_def_type
14450 attribute to reference it. */
14452 static struct type
*
14453 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14455 struct objfile
*objfile
= cu
->objfile
;
14456 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14457 struct type
*type
, *range_type
, *index_type
, *char_type
;
14458 struct attribute
*attr
;
14459 unsigned int length
;
14461 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14464 length
= DW_UNSND (attr
);
14468 /* Check for the DW_AT_byte_size attribute. */
14469 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14472 length
= DW_UNSND (attr
);
14480 index_type
= objfile_type (objfile
)->builtin_int
;
14481 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14482 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14483 type
= create_string_type (NULL
, char_type
, range_type
);
14485 return set_die_type (die
, type
, cu
);
14488 /* Assuming that DIE corresponds to a function, returns nonzero
14489 if the function is prototyped. */
14492 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14494 struct attribute
*attr
;
14496 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14497 if (attr
&& (DW_UNSND (attr
) != 0))
14500 /* The DWARF standard implies that the DW_AT_prototyped attribute
14501 is only meaninful for C, but the concept also extends to other
14502 languages that allow unprototyped functions (Eg: Objective C).
14503 For all other languages, assume that functions are always
14505 if (cu
->language
!= language_c
14506 && cu
->language
!= language_objc
14507 && cu
->language
!= language_opencl
)
14510 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14511 prototyped and unprototyped functions; default to prototyped,
14512 since that is more common in modern code (and RealView warns
14513 about unprototyped functions). */
14514 if (producer_is_realview (cu
->producer
))
14520 /* Handle DIES due to C code like:
14524 int (*funcp)(int a, long l);
14528 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14530 static struct type
*
14531 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14533 struct objfile
*objfile
= cu
->objfile
;
14534 struct type
*type
; /* Type that this function returns. */
14535 struct type
*ftype
; /* Function that returns above type. */
14536 struct attribute
*attr
;
14538 type
= die_type (die
, cu
);
14540 /* The die_type call above may have already set the type for this DIE. */
14541 ftype
= get_die_type (die
, cu
);
14545 ftype
= lookup_function_type (type
);
14547 if (prototyped_function_p (die
, cu
))
14548 TYPE_PROTOTYPED (ftype
) = 1;
14550 /* Store the calling convention in the type if it's available in
14551 the subroutine die. Otherwise set the calling convention to
14552 the default value DW_CC_normal. */
14553 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14555 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14556 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14557 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14559 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14561 /* Record whether the function returns normally to its caller or not
14562 if the DWARF producer set that information. */
14563 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14564 if (attr
&& (DW_UNSND (attr
) != 0))
14565 TYPE_NO_RETURN (ftype
) = 1;
14567 /* We need to add the subroutine type to the die immediately so
14568 we don't infinitely recurse when dealing with parameters
14569 declared as the same subroutine type. */
14570 set_die_type (die
, ftype
, cu
);
14572 if (die
->child
!= NULL
)
14574 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14575 struct die_info
*child_die
;
14576 int nparams
, iparams
;
14578 /* Count the number of parameters.
14579 FIXME: GDB currently ignores vararg functions, but knows about
14580 vararg member functions. */
14582 child_die
= die
->child
;
14583 while (child_die
&& child_die
->tag
)
14585 if (child_die
->tag
== DW_TAG_formal_parameter
)
14587 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14588 TYPE_VARARGS (ftype
) = 1;
14589 child_die
= sibling_die (child_die
);
14592 /* Allocate storage for parameters and fill them in. */
14593 TYPE_NFIELDS (ftype
) = nparams
;
14594 TYPE_FIELDS (ftype
) = (struct field
*)
14595 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14597 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14598 even if we error out during the parameters reading below. */
14599 for (iparams
= 0; iparams
< nparams
; iparams
++)
14600 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14603 child_die
= die
->child
;
14604 while (child_die
&& child_die
->tag
)
14606 if (child_die
->tag
== DW_TAG_formal_parameter
)
14608 struct type
*arg_type
;
14610 /* DWARF version 2 has no clean way to discern C++
14611 static and non-static member functions. G++ helps
14612 GDB by marking the first parameter for non-static
14613 member functions (which is the this pointer) as
14614 artificial. We pass this information to
14615 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14617 DWARF version 3 added DW_AT_object_pointer, which GCC
14618 4.5 does not yet generate. */
14619 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14621 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14624 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14626 /* GCC/43521: In java, the formal parameter
14627 "this" is sometimes not marked with DW_AT_artificial. */
14628 if (cu
->language
== language_java
)
14630 const char *name
= dwarf2_name (child_die
, cu
);
14632 if (name
&& !strcmp (name
, "this"))
14633 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14636 arg_type
= die_type (child_die
, cu
);
14638 /* RealView does not mark THIS as const, which the testsuite
14639 expects. GCC marks THIS as const in method definitions,
14640 but not in the class specifications (GCC PR 43053). */
14641 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14642 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14645 struct dwarf2_cu
*arg_cu
= cu
;
14646 const char *name
= dwarf2_name (child_die
, cu
);
14648 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14651 /* If the compiler emits this, use it. */
14652 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14655 else if (name
&& strcmp (name
, "this") == 0)
14656 /* Function definitions will have the argument names. */
14658 else if (name
== NULL
&& iparams
== 0)
14659 /* Declarations may not have the names, so like
14660 elsewhere in GDB, assume an artificial first
14661 argument is "this". */
14665 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14669 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14672 child_die
= sibling_die (child_die
);
14679 static struct type
*
14680 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14682 struct objfile
*objfile
= cu
->objfile
;
14683 const char *name
= NULL
;
14684 struct type
*this_type
, *target_type
;
14686 name
= dwarf2_full_name (NULL
, die
, cu
);
14687 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14688 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14689 TYPE_NAME (this_type
) = name
;
14690 set_die_type (die
, this_type
, cu
);
14691 target_type
= die_type (die
, cu
);
14692 if (target_type
!= this_type
)
14693 TYPE_TARGET_TYPE (this_type
) = target_type
;
14696 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14697 spec and cause infinite loops in GDB. */
14698 complaint (&symfile_complaints
,
14699 _("Self-referential DW_TAG_typedef "
14700 "- DIE at 0x%x [in module %s]"),
14701 die
->offset
.sect_off
, objfile_name (objfile
));
14702 TYPE_TARGET_TYPE (this_type
) = NULL
;
14707 /* Find a representation of a given base type and install
14708 it in the TYPE field of the die. */
14710 static struct type
*
14711 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14713 struct objfile
*objfile
= cu
->objfile
;
14715 struct attribute
*attr
;
14716 int encoding
= 0, size
= 0;
14718 enum type_code code
= TYPE_CODE_INT
;
14719 int type_flags
= 0;
14720 struct type
*target_type
= NULL
;
14722 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14725 encoding
= DW_UNSND (attr
);
14727 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14730 size
= DW_UNSND (attr
);
14732 name
= dwarf2_name (die
, cu
);
14735 complaint (&symfile_complaints
,
14736 _("DW_AT_name missing from DW_TAG_base_type"));
14741 case DW_ATE_address
:
14742 /* Turn DW_ATE_address into a void * pointer. */
14743 code
= TYPE_CODE_PTR
;
14744 type_flags
|= TYPE_FLAG_UNSIGNED
;
14745 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14747 case DW_ATE_boolean
:
14748 code
= TYPE_CODE_BOOL
;
14749 type_flags
|= TYPE_FLAG_UNSIGNED
;
14751 case DW_ATE_complex_float
:
14752 code
= TYPE_CODE_COMPLEX
;
14753 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14755 case DW_ATE_decimal_float
:
14756 code
= TYPE_CODE_DECFLOAT
;
14759 code
= TYPE_CODE_FLT
;
14761 case DW_ATE_signed
:
14763 case DW_ATE_unsigned
:
14764 type_flags
|= TYPE_FLAG_UNSIGNED
;
14765 if (cu
->language
== language_fortran
14767 && startswith (name
, "character("))
14768 code
= TYPE_CODE_CHAR
;
14770 case DW_ATE_signed_char
:
14771 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14772 || cu
->language
== language_pascal
14773 || cu
->language
== language_fortran
)
14774 code
= TYPE_CODE_CHAR
;
14776 case DW_ATE_unsigned_char
:
14777 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14778 || cu
->language
== language_pascal
14779 || cu
->language
== language_fortran
)
14780 code
= TYPE_CODE_CHAR
;
14781 type_flags
|= TYPE_FLAG_UNSIGNED
;
14784 /* We just treat this as an integer and then recognize the
14785 type by name elsewhere. */
14789 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14790 dwarf_type_encoding_name (encoding
));
14794 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14795 TYPE_NAME (type
) = name
;
14796 TYPE_TARGET_TYPE (type
) = target_type
;
14798 if (name
&& strcmp (name
, "char") == 0)
14799 TYPE_NOSIGN (type
) = 1;
14801 return set_die_type (die
, type
, cu
);
14804 /* Parse dwarf attribute if it's a block, reference or constant and put the
14805 resulting value of the attribute into struct bound_prop.
14806 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14809 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14810 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14812 struct dwarf2_property_baton
*baton
;
14813 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14815 if (attr
== NULL
|| prop
== NULL
)
14818 if (attr_form_is_block (attr
))
14820 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14821 baton
->referenced_type
= NULL
;
14822 baton
->locexpr
.per_cu
= cu
->per_cu
;
14823 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14824 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14825 prop
->data
.baton
= baton
;
14826 prop
->kind
= PROP_LOCEXPR
;
14827 gdb_assert (prop
->data
.baton
!= NULL
);
14829 else if (attr_form_is_ref (attr
))
14831 struct dwarf2_cu
*target_cu
= cu
;
14832 struct die_info
*target_die
;
14833 struct attribute
*target_attr
;
14835 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14836 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14837 if (target_attr
== NULL
)
14838 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14840 if (target_attr
== NULL
)
14843 switch (target_attr
->name
)
14845 case DW_AT_location
:
14846 if (attr_form_is_section_offset (target_attr
))
14848 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14849 baton
->referenced_type
= die_type (target_die
, target_cu
);
14850 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14851 prop
->data
.baton
= baton
;
14852 prop
->kind
= PROP_LOCLIST
;
14853 gdb_assert (prop
->data
.baton
!= NULL
);
14855 else if (attr_form_is_block (target_attr
))
14857 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14858 baton
->referenced_type
= die_type (target_die
, target_cu
);
14859 baton
->locexpr
.per_cu
= cu
->per_cu
;
14860 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14861 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14862 prop
->data
.baton
= baton
;
14863 prop
->kind
= PROP_LOCEXPR
;
14864 gdb_assert (prop
->data
.baton
!= NULL
);
14868 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14869 "dynamic property");
14873 case DW_AT_data_member_location
:
14877 if (!handle_data_member_location (target_die
, target_cu
,
14881 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14882 baton
->referenced_type
= read_type_die (target_die
->parent
,
14884 baton
->offset_info
.offset
= offset
;
14885 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14886 prop
->data
.baton
= baton
;
14887 prop
->kind
= PROP_ADDR_OFFSET
;
14892 else if (attr_form_is_constant (attr
))
14894 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14895 prop
->kind
= PROP_CONST
;
14899 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14900 dwarf2_name (die
, cu
));
14907 /* Read the given DW_AT_subrange DIE. */
14909 static struct type
*
14910 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14912 struct type
*base_type
, *orig_base_type
;
14913 struct type
*range_type
;
14914 struct attribute
*attr
;
14915 struct dynamic_prop low
, high
;
14916 int low_default_is_valid
;
14917 int high_bound_is_count
= 0;
14919 LONGEST negative_mask
;
14921 orig_base_type
= die_type (die
, cu
);
14922 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14923 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14924 creating the range type, but we use the result of check_typedef
14925 when examining properties of the type. */
14926 base_type
= check_typedef (orig_base_type
);
14928 /* The die_type call above may have already set the type for this DIE. */
14929 range_type
= get_die_type (die
, cu
);
14933 low
.kind
= PROP_CONST
;
14934 high
.kind
= PROP_CONST
;
14935 high
.data
.const_val
= 0;
14937 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14938 omitting DW_AT_lower_bound. */
14939 switch (cu
->language
)
14942 case language_cplus
:
14943 low
.data
.const_val
= 0;
14944 low_default_is_valid
= 1;
14946 case language_fortran
:
14947 low
.data
.const_val
= 1;
14948 low_default_is_valid
= 1;
14951 case language_java
:
14952 case language_objc
:
14953 low
.data
.const_val
= 0;
14954 low_default_is_valid
= (cu
->header
.version
>= 4);
14958 case language_pascal
:
14959 low
.data
.const_val
= 1;
14960 low_default_is_valid
= (cu
->header
.version
>= 4);
14963 low
.data
.const_val
= 0;
14964 low_default_is_valid
= 0;
14968 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14970 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14971 else if (!low_default_is_valid
)
14972 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14973 "- DIE at 0x%x [in module %s]"),
14974 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14976 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14977 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14979 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14980 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14982 /* If bounds are constant do the final calculation here. */
14983 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14984 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14986 high_bound_is_count
= 1;
14990 /* Dwarf-2 specifications explicitly allows to create subrange types
14991 without specifying a base type.
14992 In that case, the base type must be set to the type of
14993 the lower bound, upper bound or count, in that order, if any of these
14994 three attributes references an object that has a type.
14995 If no base type is found, the Dwarf-2 specifications say that
14996 a signed integer type of size equal to the size of an address should
14998 For the following C code: `extern char gdb_int [];'
14999 GCC produces an empty range DIE.
15000 FIXME: muller/2010-05-28: Possible references to object for low bound,
15001 high bound or count are not yet handled by this code. */
15002 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15004 struct objfile
*objfile
= cu
->objfile
;
15005 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15006 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15007 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15009 /* Test "int", "long int", and "long long int" objfile types,
15010 and select the first one having a size above or equal to the
15011 architecture address size. */
15012 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15013 base_type
= int_type
;
15016 int_type
= objfile_type (objfile
)->builtin_long
;
15017 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15018 base_type
= int_type
;
15021 int_type
= objfile_type (objfile
)->builtin_long_long
;
15022 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15023 base_type
= int_type
;
15028 /* Normally, the DWARF producers are expected to use a signed
15029 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15030 But this is unfortunately not always the case, as witnessed
15031 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15032 is used instead. To work around that ambiguity, we treat
15033 the bounds as signed, and thus sign-extend their values, when
15034 the base type is signed. */
15036 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15037 if (low
.kind
== PROP_CONST
15038 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15039 low
.data
.const_val
|= negative_mask
;
15040 if (high
.kind
== PROP_CONST
15041 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15042 high
.data
.const_val
|= negative_mask
;
15044 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15046 if (high_bound_is_count
)
15047 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15049 /* Ada expects an empty array on no boundary attributes. */
15050 if (attr
== NULL
&& cu
->language
!= language_ada
)
15051 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15053 name
= dwarf2_name (die
, cu
);
15055 TYPE_NAME (range_type
) = name
;
15057 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15059 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15061 set_die_type (die
, range_type
, cu
);
15063 /* set_die_type should be already done. */
15064 set_descriptive_type (range_type
, die
, cu
);
15069 static struct type
*
15070 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15074 /* For now, we only support the C meaning of an unspecified type: void. */
15076 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15077 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15079 return set_die_type (die
, type
, cu
);
15082 /* Read a single die and all its descendents. Set the die's sibling
15083 field to NULL; set other fields in the die correctly, and set all
15084 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15085 location of the info_ptr after reading all of those dies. PARENT
15086 is the parent of the die in question. */
15088 static struct die_info
*
15089 read_die_and_children (const struct die_reader_specs
*reader
,
15090 const gdb_byte
*info_ptr
,
15091 const gdb_byte
**new_info_ptr
,
15092 struct die_info
*parent
)
15094 struct die_info
*die
;
15095 const gdb_byte
*cur_ptr
;
15098 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15101 *new_info_ptr
= cur_ptr
;
15104 store_in_ref_table (die
, reader
->cu
);
15107 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15111 *new_info_ptr
= cur_ptr
;
15114 die
->sibling
= NULL
;
15115 die
->parent
= parent
;
15119 /* Read a die, all of its descendents, and all of its siblings; set
15120 all of the fields of all of the dies correctly. Arguments are as
15121 in read_die_and_children. */
15123 static struct die_info
*
15124 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15125 const gdb_byte
*info_ptr
,
15126 const gdb_byte
**new_info_ptr
,
15127 struct die_info
*parent
)
15129 struct die_info
*first_die
, *last_sibling
;
15130 const gdb_byte
*cur_ptr
;
15132 cur_ptr
= info_ptr
;
15133 first_die
= last_sibling
= NULL
;
15137 struct die_info
*die
15138 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15142 *new_info_ptr
= cur_ptr
;
15149 last_sibling
->sibling
= die
;
15151 last_sibling
= die
;
15155 /* Read a die, all of its descendents, and all of its siblings; set
15156 all of the fields of all of the dies correctly. Arguments are as
15157 in read_die_and_children.
15158 This the main entry point for reading a DIE and all its children. */
15160 static struct die_info
*
15161 read_die_and_siblings (const struct die_reader_specs
*reader
,
15162 const gdb_byte
*info_ptr
,
15163 const gdb_byte
**new_info_ptr
,
15164 struct die_info
*parent
)
15166 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15167 new_info_ptr
, parent
);
15169 if (dwarf_die_debug
)
15171 fprintf_unfiltered (gdb_stdlog
,
15172 "Read die from %s@0x%x of %s:\n",
15173 get_section_name (reader
->die_section
),
15174 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15175 bfd_get_filename (reader
->abfd
));
15176 dump_die (die
, dwarf_die_debug
);
15182 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15184 The caller is responsible for filling in the extra attributes
15185 and updating (*DIEP)->num_attrs.
15186 Set DIEP to point to a newly allocated die with its information,
15187 except for its child, sibling, and parent fields.
15188 Set HAS_CHILDREN to tell whether the die has children or not. */
15190 static const gdb_byte
*
15191 read_full_die_1 (const struct die_reader_specs
*reader
,
15192 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15193 int *has_children
, int num_extra_attrs
)
15195 unsigned int abbrev_number
, bytes_read
, i
;
15196 sect_offset offset
;
15197 struct abbrev_info
*abbrev
;
15198 struct die_info
*die
;
15199 struct dwarf2_cu
*cu
= reader
->cu
;
15200 bfd
*abfd
= reader
->abfd
;
15202 offset
.sect_off
= info_ptr
- reader
->buffer
;
15203 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15204 info_ptr
+= bytes_read
;
15205 if (!abbrev_number
)
15212 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15214 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15216 bfd_get_filename (abfd
));
15218 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15219 die
->offset
= offset
;
15220 die
->tag
= abbrev
->tag
;
15221 die
->abbrev
= abbrev_number
;
15223 /* Make the result usable.
15224 The caller needs to update num_attrs after adding the extra
15226 die
->num_attrs
= abbrev
->num_attrs
;
15228 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15229 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15233 *has_children
= abbrev
->has_children
;
15237 /* Read a die and all its attributes.
15238 Set DIEP to point to a newly allocated die with its information,
15239 except for its child, sibling, and parent fields.
15240 Set HAS_CHILDREN to tell whether the die has children or not. */
15242 static const gdb_byte
*
15243 read_full_die (const struct die_reader_specs
*reader
,
15244 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15247 const gdb_byte
*result
;
15249 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15251 if (dwarf_die_debug
)
15253 fprintf_unfiltered (gdb_stdlog
,
15254 "Read die from %s@0x%x of %s:\n",
15255 get_section_name (reader
->die_section
),
15256 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15257 bfd_get_filename (reader
->abfd
));
15258 dump_die (*diep
, dwarf_die_debug
);
15264 /* Abbreviation tables.
15266 In DWARF version 2, the description of the debugging information is
15267 stored in a separate .debug_abbrev section. Before we read any
15268 dies from a section we read in all abbreviations and install them
15269 in a hash table. */
15271 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15273 static struct abbrev_info
*
15274 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15276 struct abbrev_info
*abbrev
;
15278 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15279 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15284 /* Add an abbreviation to the table. */
15287 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15288 unsigned int abbrev_number
,
15289 struct abbrev_info
*abbrev
)
15291 unsigned int hash_number
;
15293 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15294 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15295 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15298 /* Look up an abbrev in the table.
15299 Returns NULL if the abbrev is not found. */
15301 static struct abbrev_info
*
15302 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15303 unsigned int abbrev_number
)
15305 unsigned int hash_number
;
15306 struct abbrev_info
*abbrev
;
15308 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15309 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15313 if (abbrev
->number
== abbrev_number
)
15315 abbrev
= abbrev
->next
;
15320 /* Read in an abbrev table. */
15322 static struct abbrev_table
*
15323 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15324 sect_offset offset
)
15326 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15327 bfd
*abfd
= get_section_bfd_owner (section
);
15328 struct abbrev_table
*abbrev_table
;
15329 const gdb_byte
*abbrev_ptr
;
15330 struct abbrev_info
*cur_abbrev
;
15331 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15332 unsigned int abbrev_form
;
15333 struct attr_abbrev
*cur_attrs
;
15334 unsigned int allocated_attrs
;
15336 abbrev_table
= XNEW (struct abbrev_table
);
15337 abbrev_table
->offset
= offset
;
15338 obstack_init (&abbrev_table
->abbrev_obstack
);
15339 abbrev_table
->abbrevs
=
15340 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15342 memset (abbrev_table
->abbrevs
, 0,
15343 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15345 dwarf2_read_section (objfile
, section
);
15346 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15347 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15348 abbrev_ptr
+= bytes_read
;
15350 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15351 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15353 /* Loop until we reach an abbrev number of 0. */
15354 while (abbrev_number
)
15356 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15358 /* read in abbrev header */
15359 cur_abbrev
->number
= abbrev_number
;
15361 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15362 abbrev_ptr
+= bytes_read
;
15363 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15366 /* now read in declarations */
15367 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15368 abbrev_ptr
+= bytes_read
;
15369 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15370 abbrev_ptr
+= bytes_read
;
15371 while (abbrev_name
)
15373 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15375 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15377 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15380 cur_attrs
[cur_abbrev
->num_attrs
].name
15381 = (enum dwarf_attribute
) abbrev_name
;
15382 cur_attrs
[cur_abbrev
->num_attrs
++].form
15383 = (enum dwarf_form
) abbrev_form
;
15384 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15385 abbrev_ptr
+= bytes_read
;
15386 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15387 abbrev_ptr
+= bytes_read
;
15390 cur_abbrev
->attrs
=
15391 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15392 cur_abbrev
->num_attrs
);
15393 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15394 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15396 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15398 /* Get next abbreviation.
15399 Under Irix6 the abbreviations for a compilation unit are not
15400 always properly terminated with an abbrev number of 0.
15401 Exit loop if we encounter an abbreviation which we have
15402 already read (which means we are about to read the abbreviations
15403 for the next compile unit) or if the end of the abbreviation
15404 table is reached. */
15405 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15407 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15408 abbrev_ptr
+= bytes_read
;
15409 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15414 return abbrev_table
;
15417 /* Free the resources held by ABBREV_TABLE. */
15420 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15422 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15423 xfree (abbrev_table
);
15426 /* Same as abbrev_table_free but as a cleanup.
15427 We pass in a pointer to the pointer to the table so that we can
15428 set the pointer to NULL when we're done. It also simplifies
15429 build_type_psymtabs_1. */
15432 abbrev_table_free_cleanup (void *table_ptr
)
15434 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15436 if (*abbrev_table_ptr
!= NULL
)
15437 abbrev_table_free (*abbrev_table_ptr
);
15438 *abbrev_table_ptr
= NULL
;
15441 /* Read the abbrev table for CU from ABBREV_SECTION. */
15444 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15445 struct dwarf2_section_info
*abbrev_section
)
15448 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15451 /* Release the memory used by the abbrev table for a compilation unit. */
15454 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15456 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15458 if (cu
->abbrev_table
!= NULL
)
15459 abbrev_table_free (cu
->abbrev_table
);
15460 /* Set this to NULL so that we SEGV if we try to read it later,
15461 and also because free_comp_unit verifies this is NULL. */
15462 cu
->abbrev_table
= NULL
;
15465 /* Returns nonzero if TAG represents a type that we might generate a partial
15469 is_type_tag_for_partial (int tag
)
15474 /* Some types that would be reasonable to generate partial symbols for,
15475 that we don't at present. */
15476 case DW_TAG_array_type
:
15477 case DW_TAG_file_type
:
15478 case DW_TAG_ptr_to_member_type
:
15479 case DW_TAG_set_type
:
15480 case DW_TAG_string_type
:
15481 case DW_TAG_subroutine_type
:
15483 case DW_TAG_base_type
:
15484 case DW_TAG_class_type
:
15485 case DW_TAG_interface_type
:
15486 case DW_TAG_enumeration_type
:
15487 case DW_TAG_structure_type
:
15488 case DW_TAG_subrange_type
:
15489 case DW_TAG_typedef
:
15490 case DW_TAG_union_type
:
15497 /* Load all DIEs that are interesting for partial symbols into memory. */
15499 static struct partial_die_info
*
15500 load_partial_dies (const struct die_reader_specs
*reader
,
15501 const gdb_byte
*info_ptr
, int building_psymtab
)
15503 struct dwarf2_cu
*cu
= reader
->cu
;
15504 struct objfile
*objfile
= cu
->objfile
;
15505 struct partial_die_info
*part_die
;
15506 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15507 struct abbrev_info
*abbrev
;
15508 unsigned int bytes_read
;
15509 unsigned int load_all
= 0;
15510 int nesting_level
= 1;
15515 gdb_assert (cu
->per_cu
!= NULL
);
15516 if (cu
->per_cu
->load_all_dies
)
15520 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15524 &cu
->comp_unit_obstack
,
15525 hashtab_obstack_allocate
,
15526 dummy_obstack_deallocate
);
15528 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15532 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15534 /* A NULL abbrev means the end of a series of children. */
15535 if (abbrev
== NULL
)
15537 if (--nesting_level
== 0)
15539 /* PART_DIE was probably the last thing allocated on the
15540 comp_unit_obstack, so we could call obstack_free
15541 here. We don't do that because the waste is small,
15542 and will be cleaned up when we're done with this
15543 compilation unit. This way, we're also more robust
15544 against other users of the comp_unit_obstack. */
15547 info_ptr
+= bytes_read
;
15548 last_die
= parent_die
;
15549 parent_die
= parent_die
->die_parent
;
15553 /* Check for template arguments. We never save these; if
15554 they're seen, we just mark the parent, and go on our way. */
15555 if (parent_die
!= NULL
15556 && cu
->language
== language_cplus
15557 && (abbrev
->tag
== DW_TAG_template_type_param
15558 || abbrev
->tag
== DW_TAG_template_value_param
))
15560 parent_die
->has_template_arguments
= 1;
15564 /* We don't need a partial DIE for the template argument. */
15565 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15570 /* We only recurse into c++ subprograms looking for template arguments.
15571 Skip their other children. */
15573 && cu
->language
== language_cplus
15574 && parent_die
!= NULL
15575 && parent_die
->tag
== DW_TAG_subprogram
)
15577 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15581 /* Check whether this DIE is interesting enough to save. Normally
15582 we would not be interested in members here, but there may be
15583 later variables referencing them via DW_AT_specification (for
15584 static members). */
15586 && !is_type_tag_for_partial (abbrev
->tag
)
15587 && abbrev
->tag
!= DW_TAG_constant
15588 && abbrev
->tag
!= DW_TAG_enumerator
15589 && abbrev
->tag
!= DW_TAG_subprogram
15590 && abbrev
->tag
!= DW_TAG_lexical_block
15591 && abbrev
->tag
!= DW_TAG_variable
15592 && abbrev
->tag
!= DW_TAG_namespace
15593 && abbrev
->tag
!= DW_TAG_module
15594 && abbrev
->tag
!= DW_TAG_member
15595 && abbrev
->tag
!= DW_TAG_imported_unit
15596 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15598 /* Otherwise we skip to the next sibling, if any. */
15599 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15603 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15606 /* This two-pass algorithm for processing partial symbols has a
15607 high cost in cache pressure. Thus, handle some simple cases
15608 here which cover the majority of C partial symbols. DIEs
15609 which neither have specification tags in them, nor could have
15610 specification tags elsewhere pointing at them, can simply be
15611 processed and discarded.
15613 This segment is also optional; scan_partial_symbols and
15614 add_partial_symbol will handle these DIEs if we chain
15615 them in normally. When compilers which do not emit large
15616 quantities of duplicate debug information are more common,
15617 this code can probably be removed. */
15619 /* Any complete simple types at the top level (pretty much all
15620 of them, for a language without namespaces), can be processed
15622 if (parent_die
== NULL
15623 && part_die
->has_specification
== 0
15624 && part_die
->is_declaration
== 0
15625 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15626 || part_die
->tag
== DW_TAG_base_type
15627 || part_die
->tag
== DW_TAG_subrange_type
))
15629 if (building_psymtab
&& part_die
->name
!= NULL
)
15630 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15631 VAR_DOMAIN
, LOC_TYPEDEF
,
15632 &objfile
->static_psymbols
,
15633 0, cu
->language
, objfile
);
15634 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15638 /* The exception for DW_TAG_typedef with has_children above is
15639 a workaround of GCC PR debug/47510. In the case of this complaint
15640 type_name_no_tag_or_error will error on such types later.
15642 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15643 it could not find the child DIEs referenced later, this is checked
15644 above. In correct DWARF DW_TAG_typedef should have no children. */
15646 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15647 complaint (&symfile_complaints
,
15648 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15649 "- DIE at 0x%x [in module %s]"),
15650 part_die
->offset
.sect_off
, objfile_name (objfile
));
15652 /* If we're at the second level, and we're an enumerator, and
15653 our parent has no specification (meaning possibly lives in a
15654 namespace elsewhere), then we can add the partial symbol now
15655 instead of queueing it. */
15656 if (part_die
->tag
== DW_TAG_enumerator
15657 && parent_die
!= NULL
15658 && parent_die
->die_parent
== NULL
15659 && parent_die
->tag
== DW_TAG_enumeration_type
15660 && parent_die
->has_specification
== 0)
15662 if (part_die
->name
== NULL
)
15663 complaint (&symfile_complaints
,
15664 _("malformed enumerator DIE ignored"));
15665 else if (building_psymtab
)
15666 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15667 VAR_DOMAIN
, LOC_CONST
,
15668 (cu
->language
== language_cplus
15669 || cu
->language
== language_java
)
15670 ? &objfile
->global_psymbols
15671 : &objfile
->static_psymbols
,
15672 0, cu
->language
, objfile
);
15674 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15678 /* We'll save this DIE so link it in. */
15679 part_die
->die_parent
= parent_die
;
15680 part_die
->die_sibling
= NULL
;
15681 part_die
->die_child
= NULL
;
15683 if (last_die
&& last_die
== parent_die
)
15684 last_die
->die_child
= part_die
;
15686 last_die
->die_sibling
= part_die
;
15688 last_die
= part_die
;
15690 if (first_die
== NULL
)
15691 first_die
= part_die
;
15693 /* Maybe add the DIE to the hash table. Not all DIEs that we
15694 find interesting need to be in the hash table, because we
15695 also have the parent/sibling/child chains; only those that we
15696 might refer to by offset later during partial symbol reading.
15698 For now this means things that might have be the target of a
15699 DW_AT_specification, DW_AT_abstract_origin, or
15700 DW_AT_extension. DW_AT_extension will refer only to
15701 namespaces; DW_AT_abstract_origin refers to functions (and
15702 many things under the function DIE, but we do not recurse
15703 into function DIEs during partial symbol reading) and
15704 possibly variables as well; DW_AT_specification refers to
15705 declarations. Declarations ought to have the DW_AT_declaration
15706 flag. It happens that GCC forgets to put it in sometimes, but
15707 only for functions, not for types.
15709 Adding more things than necessary to the hash table is harmless
15710 except for the performance cost. Adding too few will result in
15711 wasted time in find_partial_die, when we reread the compilation
15712 unit with load_all_dies set. */
15715 || abbrev
->tag
== DW_TAG_constant
15716 || abbrev
->tag
== DW_TAG_subprogram
15717 || abbrev
->tag
== DW_TAG_variable
15718 || abbrev
->tag
== DW_TAG_namespace
15719 || part_die
->is_declaration
)
15723 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15724 part_die
->offset
.sect_off
, INSERT
);
15728 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15730 /* For some DIEs we want to follow their children (if any). For C
15731 we have no reason to follow the children of structures; for other
15732 languages we have to, so that we can get at method physnames
15733 to infer fully qualified class names, for DW_AT_specification,
15734 and for C++ template arguments. For C++, we also look one level
15735 inside functions to find template arguments (if the name of the
15736 function does not already contain the template arguments).
15738 For Ada, we need to scan the children of subprograms and lexical
15739 blocks as well because Ada allows the definition of nested
15740 entities that could be interesting for the debugger, such as
15741 nested subprograms for instance. */
15742 if (last_die
->has_children
15744 || last_die
->tag
== DW_TAG_namespace
15745 || last_die
->tag
== DW_TAG_module
15746 || last_die
->tag
== DW_TAG_enumeration_type
15747 || (cu
->language
== language_cplus
15748 && last_die
->tag
== DW_TAG_subprogram
15749 && (last_die
->name
== NULL
15750 || strchr (last_die
->name
, '<') == NULL
))
15751 || (cu
->language
!= language_c
15752 && (last_die
->tag
== DW_TAG_class_type
15753 || last_die
->tag
== DW_TAG_interface_type
15754 || last_die
->tag
== DW_TAG_structure_type
15755 || last_die
->tag
== DW_TAG_union_type
))
15756 || (cu
->language
== language_ada
15757 && (last_die
->tag
== DW_TAG_subprogram
15758 || last_die
->tag
== DW_TAG_lexical_block
))))
15761 parent_die
= last_die
;
15765 /* Otherwise we skip to the next sibling, if any. */
15766 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15768 /* Back to the top, do it again. */
15772 /* Read a minimal amount of information into the minimal die structure. */
15774 static const gdb_byte
*
15775 read_partial_die (const struct die_reader_specs
*reader
,
15776 struct partial_die_info
*part_die
,
15777 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15778 const gdb_byte
*info_ptr
)
15780 struct dwarf2_cu
*cu
= reader
->cu
;
15781 struct objfile
*objfile
= cu
->objfile
;
15782 const gdb_byte
*buffer
= reader
->buffer
;
15784 struct attribute attr
;
15785 int has_low_pc_attr
= 0;
15786 int has_high_pc_attr
= 0;
15787 int high_pc_relative
= 0;
15789 memset (part_die
, 0, sizeof (struct partial_die_info
));
15791 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15793 info_ptr
+= abbrev_len
;
15795 if (abbrev
== NULL
)
15798 part_die
->tag
= abbrev
->tag
;
15799 part_die
->has_children
= abbrev
->has_children
;
15801 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15803 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15805 /* Store the data if it is of an attribute we want to keep in a
15806 partial symbol table. */
15810 switch (part_die
->tag
)
15812 case DW_TAG_compile_unit
:
15813 case DW_TAG_partial_unit
:
15814 case DW_TAG_type_unit
:
15815 /* Compilation units have a DW_AT_name that is a filename, not
15816 a source language identifier. */
15817 case DW_TAG_enumeration_type
:
15818 case DW_TAG_enumerator
:
15819 /* These tags always have simple identifiers already; no need
15820 to canonicalize them. */
15821 part_die
->name
= DW_STRING (&attr
);
15825 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15826 &objfile
->per_bfd
->storage_obstack
);
15830 case DW_AT_linkage_name
:
15831 case DW_AT_MIPS_linkage_name
:
15832 /* Note that both forms of linkage name might appear. We
15833 assume they will be the same, and we only store the last
15835 if (cu
->language
== language_ada
)
15836 part_die
->name
= DW_STRING (&attr
);
15837 part_die
->linkage_name
= DW_STRING (&attr
);
15840 has_low_pc_attr
= 1;
15841 part_die
->lowpc
= attr_value_as_address (&attr
);
15843 case DW_AT_high_pc
:
15844 has_high_pc_attr
= 1;
15845 part_die
->highpc
= attr_value_as_address (&attr
);
15846 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15847 high_pc_relative
= 1;
15849 case DW_AT_location
:
15850 /* Support the .debug_loc offsets. */
15851 if (attr_form_is_block (&attr
))
15853 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15855 else if (attr_form_is_section_offset (&attr
))
15857 dwarf2_complex_location_expr_complaint ();
15861 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15862 "partial symbol information");
15865 case DW_AT_external
:
15866 part_die
->is_external
= DW_UNSND (&attr
);
15868 case DW_AT_declaration
:
15869 part_die
->is_declaration
= DW_UNSND (&attr
);
15872 part_die
->has_type
= 1;
15874 case DW_AT_abstract_origin
:
15875 case DW_AT_specification
:
15876 case DW_AT_extension
:
15877 part_die
->has_specification
= 1;
15878 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15879 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15880 || cu
->per_cu
->is_dwz
);
15882 case DW_AT_sibling
:
15883 /* Ignore absolute siblings, they might point outside of
15884 the current compile unit. */
15885 if (attr
.form
== DW_FORM_ref_addr
)
15886 complaint (&symfile_complaints
,
15887 _("ignoring absolute DW_AT_sibling"));
15890 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15891 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15893 if (sibling_ptr
< info_ptr
)
15894 complaint (&symfile_complaints
,
15895 _("DW_AT_sibling points backwards"));
15896 else if (sibling_ptr
> reader
->buffer_end
)
15897 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15899 part_die
->sibling
= sibling_ptr
;
15902 case DW_AT_byte_size
:
15903 part_die
->has_byte_size
= 1;
15905 case DW_AT_const_value
:
15906 part_die
->has_const_value
= 1;
15908 case DW_AT_calling_convention
:
15909 /* DWARF doesn't provide a way to identify a program's source-level
15910 entry point. DW_AT_calling_convention attributes are only meant
15911 to describe functions' calling conventions.
15913 However, because it's a necessary piece of information in
15914 Fortran, and because DW_CC_program is the only piece of debugging
15915 information whose definition refers to a 'main program' at all,
15916 several compilers have begun marking Fortran main programs with
15917 DW_CC_program --- even when those functions use the standard
15918 calling conventions.
15920 So until DWARF specifies a way to provide this information and
15921 compilers pick up the new representation, we'll support this
15923 if (DW_UNSND (&attr
) == DW_CC_program
15924 && cu
->language
== language_fortran
15925 && part_die
->name
!= NULL
)
15926 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15929 if (DW_UNSND (&attr
) == DW_INL_inlined
15930 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15931 part_die
->may_be_inlined
= 1;
15935 if (part_die
->tag
== DW_TAG_imported_unit
)
15937 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15938 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15939 || cu
->per_cu
->is_dwz
);
15948 if (high_pc_relative
)
15949 part_die
->highpc
+= part_die
->lowpc
;
15951 if (has_low_pc_attr
&& has_high_pc_attr
)
15953 /* When using the GNU linker, .gnu.linkonce. sections are used to
15954 eliminate duplicate copies of functions and vtables and such.
15955 The linker will arbitrarily choose one and discard the others.
15956 The AT_*_pc values for such functions refer to local labels in
15957 these sections. If the section from that file was discarded, the
15958 labels are not in the output, so the relocs get a value of 0.
15959 If this is a discarded function, mark the pc bounds as invalid,
15960 so that GDB will ignore it. */
15961 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15963 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15965 complaint (&symfile_complaints
,
15966 _("DW_AT_low_pc %s is zero "
15967 "for DIE at 0x%x [in module %s]"),
15968 paddress (gdbarch
, part_die
->lowpc
),
15969 part_die
->offset
.sect_off
, objfile_name (objfile
));
15971 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15972 else if (part_die
->lowpc
>= part_die
->highpc
)
15974 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15976 complaint (&symfile_complaints
,
15977 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15978 "for DIE at 0x%x [in module %s]"),
15979 paddress (gdbarch
, part_die
->lowpc
),
15980 paddress (gdbarch
, part_die
->highpc
),
15981 part_die
->offset
.sect_off
, objfile_name (objfile
));
15984 part_die
->has_pc_info
= 1;
15990 /* Find a cached partial DIE at OFFSET in CU. */
15992 static struct partial_die_info
*
15993 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15995 struct partial_die_info
*lookup_die
= NULL
;
15996 struct partial_die_info part_die
;
15998 part_die
.offset
= offset
;
15999 lookup_die
= ((struct partial_die_info
*)
16000 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16006 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16007 except in the case of .debug_types DIEs which do not reference
16008 outside their CU (they do however referencing other types via
16009 DW_FORM_ref_sig8). */
16011 static struct partial_die_info
*
16012 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16014 struct objfile
*objfile
= cu
->objfile
;
16015 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16016 struct partial_die_info
*pd
= NULL
;
16018 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16019 && offset_in_cu_p (&cu
->header
, offset
))
16021 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16024 /* We missed recording what we needed.
16025 Load all dies and try again. */
16026 per_cu
= cu
->per_cu
;
16030 /* TUs don't reference other CUs/TUs (except via type signatures). */
16031 if (cu
->per_cu
->is_debug_types
)
16033 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16034 " external reference to offset 0x%lx [in module %s].\n"),
16035 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16036 bfd_get_filename (objfile
->obfd
));
16038 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16041 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16042 load_partial_comp_unit (per_cu
);
16044 per_cu
->cu
->last_used
= 0;
16045 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16048 /* If we didn't find it, and not all dies have been loaded,
16049 load them all and try again. */
16051 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16053 per_cu
->load_all_dies
= 1;
16055 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16056 THIS_CU->cu may already be in use. So we can't just free it and
16057 replace its DIEs with the ones we read in. Instead, we leave those
16058 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16059 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16061 load_partial_comp_unit (per_cu
);
16063 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16067 internal_error (__FILE__
, __LINE__
,
16068 _("could not find partial DIE 0x%x "
16069 "in cache [from module %s]\n"),
16070 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16074 /* See if we can figure out if the class lives in a namespace. We do
16075 this by looking for a member function; its demangled name will
16076 contain namespace info, if there is any. */
16079 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16080 struct dwarf2_cu
*cu
)
16082 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16083 what template types look like, because the demangler
16084 frequently doesn't give the same name as the debug info. We
16085 could fix this by only using the demangled name to get the
16086 prefix (but see comment in read_structure_type). */
16088 struct partial_die_info
*real_pdi
;
16089 struct partial_die_info
*child_pdi
;
16091 /* If this DIE (this DIE's specification, if any) has a parent, then
16092 we should not do this. We'll prepend the parent's fully qualified
16093 name when we create the partial symbol. */
16095 real_pdi
= struct_pdi
;
16096 while (real_pdi
->has_specification
)
16097 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16098 real_pdi
->spec_is_dwz
, cu
);
16100 if (real_pdi
->die_parent
!= NULL
)
16103 for (child_pdi
= struct_pdi
->die_child
;
16105 child_pdi
= child_pdi
->die_sibling
)
16107 if (child_pdi
->tag
== DW_TAG_subprogram
16108 && child_pdi
->linkage_name
!= NULL
)
16110 char *actual_class_name
16111 = language_class_name_from_physname (cu
->language_defn
,
16112 child_pdi
->linkage_name
);
16113 if (actual_class_name
!= NULL
)
16117 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16119 strlen (actual_class_name
)));
16120 xfree (actual_class_name
);
16127 /* Adjust PART_DIE before generating a symbol for it. This function
16128 may set the is_external flag or change the DIE's name. */
16131 fixup_partial_die (struct partial_die_info
*part_die
,
16132 struct dwarf2_cu
*cu
)
16134 /* Once we've fixed up a die, there's no point in doing so again.
16135 This also avoids a memory leak if we were to call
16136 guess_partial_die_structure_name multiple times. */
16137 if (part_die
->fixup_called
)
16140 /* If we found a reference attribute and the DIE has no name, try
16141 to find a name in the referred to DIE. */
16143 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16145 struct partial_die_info
*spec_die
;
16147 spec_die
= find_partial_die (part_die
->spec_offset
,
16148 part_die
->spec_is_dwz
, cu
);
16150 fixup_partial_die (spec_die
, cu
);
16152 if (spec_die
->name
)
16154 part_die
->name
= spec_die
->name
;
16156 /* Copy DW_AT_external attribute if it is set. */
16157 if (spec_die
->is_external
)
16158 part_die
->is_external
= spec_die
->is_external
;
16162 /* Set default names for some unnamed DIEs. */
16164 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16165 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16167 /* If there is no parent die to provide a namespace, and there are
16168 children, see if we can determine the namespace from their linkage
16170 if (cu
->language
== language_cplus
16171 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16172 && part_die
->die_parent
== NULL
16173 && part_die
->has_children
16174 && (part_die
->tag
== DW_TAG_class_type
16175 || part_die
->tag
== DW_TAG_structure_type
16176 || part_die
->tag
== DW_TAG_union_type
))
16177 guess_partial_die_structure_name (part_die
, cu
);
16179 /* GCC might emit a nameless struct or union that has a linkage
16180 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16181 if (part_die
->name
== NULL
16182 && (part_die
->tag
== DW_TAG_class_type
16183 || part_die
->tag
== DW_TAG_interface_type
16184 || part_die
->tag
== DW_TAG_structure_type
16185 || part_die
->tag
== DW_TAG_union_type
)
16186 && part_die
->linkage_name
!= NULL
)
16190 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16195 /* Strip any leading namespaces/classes, keep only the base name.
16196 DW_AT_name for named DIEs does not contain the prefixes. */
16197 base
= strrchr (demangled
, ':');
16198 if (base
&& base
> demangled
&& base
[-1] == ':')
16205 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16206 base
, strlen (base
)));
16211 part_die
->fixup_called
= 1;
16214 /* Read an attribute value described by an attribute form. */
16216 static const gdb_byte
*
16217 read_attribute_value (const struct die_reader_specs
*reader
,
16218 struct attribute
*attr
, unsigned form
,
16219 const gdb_byte
*info_ptr
)
16221 struct dwarf2_cu
*cu
= reader
->cu
;
16222 struct objfile
*objfile
= cu
->objfile
;
16223 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16224 bfd
*abfd
= reader
->abfd
;
16225 struct comp_unit_head
*cu_header
= &cu
->header
;
16226 unsigned int bytes_read
;
16227 struct dwarf_block
*blk
;
16229 attr
->form
= (enum dwarf_form
) form
;
16232 case DW_FORM_ref_addr
:
16233 if (cu
->header
.version
== 2)
16234 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16236 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16237 &cu
->header
, &bytes_read
);
16238 info_ptr
+= bytes_read
;
16240 case DW_FORM_GNU_ref_alt
:
16241 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16242 info_ptr
+= bytes_read
;
16245 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16246 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16247 info_ptr
+= bytes_read
;
16249 case DW_FORM_block2
:
16250 blk
= dwarf_alloc_block (cu
);
16251 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16253 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16254 info_ptr
+= blk
->size
;
16255 DW_BLOCK (attr
) = blk
;
16257 case DW_FORM_block4
:
16258 blk
= dwarf_alloc_block (cu
);
16259 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16261 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16262 info_ptr
+= blk
->size
;
16263 DW_BLOCK (attr
) = blk
;
16265 case DW_FORM_data2
:
16266 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16269 case DW_FORM_data4
:
16270 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16273 case DW_FORM_data8
:
16274 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16277 case DW_FORM_sec_offset
:
16278 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16279 info_ptr
+= bytes_read
;
16281 case DW_FORM_string
:
16282 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16283 DW_STRING_IS_CANONICAL (attr
) = 0;
16284 info_ptr
+= bytes_read
;
16287 if (!cu
->per_cu
->is_dwz
)
16289 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16291 DW_STRING_IS_CANONICAL (attr
) = 0;
16292 info_ptr
+= bytes_read
;
16296 case DW_FORM_GNU_strp_alt
:
16298 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16299 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16302 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16303 DW_STRING_IS_CANONICAL (attr
) = 0;
16304 info_ptr
+= bytes_read
;
16307 case DW_FORM_exprloc
:
16308 case DW_FORM_block
:
16309 blk
= dwarf_alloc_block (cu
);
16310 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16311 info_ptr
+= bytes_read
;
16312 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16313 info_ptr
+= blk
->size
;
16314 DW_BLOCK (attr
) = blk
;
16316 case DW_FORM_block1
:
16317 blk
= dwarf_alloc_block (cu
);
16318 blk
->size
= read_1_byte (abfd
, info_ptr
);
16320 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16321 info_ptr
+= blk
->size
;
16322 DW_BLOCK (attr
) = blk
;
16324 case DW_FORM_data1
:
16325 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16329 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16332 case DW_FORM_flag_present
:
16333 DW_UNSND (attr
) = 1;
16335 case DW_FORM_sdata
:
16336 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16337 info_ptr
+= bytes_read
;
16339 case DW_FORM_udata
:
16340 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16341 info_ptr
+= bytes_read
;
16344 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16345 + read_1_byte (abfd
, info_ptr
));
16349 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16350 + read_2_bytes (abfd
, info_ptr
));
16354 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16355 + read_4_bytes (abfd
, info_ptr
));
16359 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16360 + read_8_bytes (abfd
, info_ptr
));
16363 case DW_FORM_ref_sig8
:
16364 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16367 case DW_FORM_ref_udata
:
16368 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16369 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16370 info_ptr
+= bytes_read
;
16372 case DW_FORM_indirect
:
16373 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16374 info_ptr
+= bytes_read
;
16375 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16377 case DW_FORM_GNU_addr_index
:
16378 if (reader
->dwo_file
== NULL
)
16380 /* For now flag a hard error.
16381 Later we can turn this into a complaint. */
16382 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16383 dwarf_form_name (form
),
16384 bfd_get_filename (abfd
));
16386 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16387 info_ptr
+= bytes_read
;
16389 case DW_FORM_GNU_str_index
:
16390 if (reader
->dwo_file
== NULL
)
16392 /* For now flag a hard error.
16393 Later we can turn this into a complaint if warranted. */
16394 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16395 dwarf_form_name (form
),
16396 bfd_get_filename (abfd
));
16399 ULONGEST str_index
=
16400 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16402 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16403 DW_STRING_IS_CANONICAL (attr
) = 0;
16404 info_ptr
+= bytes_read
;
16408 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16409 dwarf_form_name (form
),
16410 bfd_get_filename (abfd
));
16414 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16415 attr
->form
= DW_FORM_GNU_ref_alt
;
16417 /* We have seen instances where the compiler tried to emit a byte
16418 size attribute of -1 which ended up being encoded as an unsigned
16419 0xffffffff. Although 0xffffffff is technically a valid size value,
16420 an object of this size seems pretty unlikely so we can relatively
16421 safely treat these cases as if the size attribute was invalid and
16422 treat them as zero by default. */
16423 if (attr
->name
== DW_AT_byte_size
16424 && form
== DW_FORM_data4
16425 && DW_UNSND (attr
) >= 0xffffffff)
16428 (&symfile_complaints
,
16429 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16430 hex_string (DW_UNSND (attr
)));
16431 DW_UNSND (attr
) = 0;
16437 /* Read an attribute described by an abbreviated attribute. */
16439 static const gdb_byte
*
16440 read_attribute (const struct die_reader_specs
*reader
,
16441 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16442 const gdb_byte
*info_ptr
)
16444 attr
->name
= abbrev
->name
;
16445 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16448 /* Read dwarf information from a buffer. */
16450 static unsigned int
16451 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16453 return bfd_get_8 (abfd
, buf
);
16457 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16459 return bfd_get_signed_8 (abfd
, buf
);
16462 static unsigned int
16463 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16465 return bfd_get_16 (abfd
, buf
);
16469 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16471 return bfd_get_signed_16 (abfd
, buf
);
16474 static unsigned int
16475 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16477 return bfd_get_32 (abfd
, buf
);
16481 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16483 return bfd_get_signed_32 (abfd
, buf
);
16487 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16489 return bfd_get_64 (abfd
, buf
);
16493 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16494 unsigned int *bytes_read
)
16496 struct comp_unit_head
*cu_header
= &cu
->header
;
16497 CORE_ADDR retval
= 0;
16499 if (cu_header
->signed_addr_p
)
16501 switch (cu_header
->addr_size
)
16504 retval
= bfd_get_signed_16 (abfd
, buf
);
16507 retval
= bfd_get_signed_32 (abfd
, buf
);
16510 retval
= bfd_get_signed_64 (abfd
, buf
);
16513 internal_error (__FILE__
, __LINE__
,
16514 _("read_address: bad switch, signed [in module %s]"),
16515 bfd_get_filename (abfd
));
16520 switch (cu_header
->addr_size
)
16523 retval
= bfd_get_16 (abfd
, buf
);
16526 retval
= bfd_get_32 (abfd
, buf
);
16529 retval
= bfd_get_64 (abfd
, buf
);
16532 internal_error (__FILE__
, __LINE__
,
16533 _("read_address: bad switch, "
16534 "unsigned [in module %s]"),
16535 bfd_get_filename (abfd
));
16539 *bytes_read
= cu_header
->addr_size
;
16543 /* Read the initial length from a section. The (draft) DWARF 3
16544 specification allows the initial length to take up either 4 bytes
16545 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16546 bytes describe the length and all offsets will be 8 bytes in length
16549 An older, non-standard 64-bit format is also handled by this
16550 function. The older format in question stores the initial length
16551 as an 8-byte quantity without an escape value. Lengths greater
16552 than 2^32 aren't very common which means that the initial 4 bytes
16553 is almost always zero. Since a length value of zero doesn't make
16554 sense for the 32-bit format, this initial zero can be considered to
16555 be an escape value which indicates the presence of the older 64-bit
16556 format. As written, the code can't detect (old format) lengths
16557 greater than 4GB. If it becomes necessary to handle lengths
16558 somewhat larger than 4GB, we could allow other small values (such
16559 as the non-sensical values of 1, 2, and 3) to also be used as
16560 escape values indicating the presence of the old format.
16562 The value returned via bytes_read should be used to increment the
16563 relevant pointer after calling read_initial_length().
16565 [ Note: read_initial_length() and read_offset() are based on the
16566 document entitled "DWARF Debugging Information Format", revision
16567 3, draft 8, dated November 19, 2001. This document was obtained
16570 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16572 This document is only a draft and is subject to change. (So beware.)
16574 Details regarding the older, non-standard 64-bit format were
16575 determined empirically by examining 64-bit ELF files produced by
16576 the SGI toolchain on an IRIX 6.5 machine.
16578 - Kevin, July 16, 2002
16582 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16584 LONGEST length
= bfd_get_32 (abfd
, buf
);
16586 if (length
== 0xffffffff)
16588 length
= bfd_get_64 (abfd
, buf
+ 4);
16591 else if (length
== 0)
16593 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16594 length
= bfd_get_64 (abfd
, buf
);
16605 /* Cover function for read_initial_length.
16606 Returns the length of the object at BUF, and stores the size of the
16607 initial length in *BYTES_READ and stores the size that offsets will be in
16609 If the initial length size is not equivalent to that specified in
16610 CU_HEADER then issue a complaint.
16611 This is useful when reading non-comp-unit headers. */
16614 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16615 const struct comp_unit_head
*cu_header
,
16616 unsigned int *bytes_read
,
16617 unsigned int *offset_size
)
16619 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16621 gdb_assert (cu_header
->initial_length_size
== 4
16622 || cu_header
->initial_length_size
== 8
16623 || cu_header
->initial_length_size
== 12);
16625 if (cu_header
->initial_length_size
!= *bytes_read
)
16626 complaint (&symfile_complaints
,
16627 _("intermixed 32-bit and 64-bit DWARF sections"));
16629 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16633 /* Read an offset from the data stream. The size of the offset is
16634 given by cu_header->offset_size. */
16637 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16638 const struct comp_unit_head
*cu_header
,
16639 unsigned int *bytes_read
)
16641 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16643 *bytes_read
= cu_header
->offset_size
;
16647 /* Read an offset from the data stream. */
16650 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16652 LONGEST retval
= 0;
16654 switch (offset_size
)
16657 retval
= bfd_get_32 (abfd
, buf
);
16660 retval
= bfd_get_64 (abfd
, buf
);
16663 internal_error (__FILE__
, __LINE__
,
16664 _("read_offset_1: bad switch [in module %s]"),
16665 bfd_get_filename (abfd
));
16671 static const gdb_byte
*
16672 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16674 /* If the size of a host char is 8 bits, we can return a pointer
16675 to the buffer, otherwise we have to copy the data to a buffer
16676 allocated on the temporary obstack. */
16677 gdb_assert (HOST_CHAR_BIT
== 8);
16681 static const char *
16682 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16683 unsigned int *bytes_read_ptr
)
16685 /* If the size of a host char is 8 bits, we can return a pointer
16686 to the string, otherwise we have to copy the string to a buffer
16687 allocated on the temporary obstack. */
16688 gdb_assert (HOST_CHAR_BIT
== 8);
16691 *bytes_read_ptr
= 1;
16694 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16695 return (const char *) buf
;
16698 static const char *
16699 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16701 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16702 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16703 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16704 bfd_get_filename (abfd
));
16705 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16706 error (_("DW_FORM_strp pointing outside of "
16707 ".debug_str section [in module %s]"),
16708 bfd_get_filename (abfd
));
16709 gdb_assert (HOST_CHAR_BIT
== 8);
16710 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16712 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16715 /* Read a string at offset STR_OFFSET in the .debug_str section from
16716 the .dwz file DWZ. Throw an error if the offset is too large. If
16717 the string consists of a single NUL byte, return NULL; otherwise
16718 return a pointer to the string. */
16720 static const char *
16721 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16723 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16725 if (dwz
->str
.buffer
== NULL
)
16726 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16727 "section [in module %s]"),
16728 bfd_get_filename (dwz
->dwz_bfd
));
16729 if (str_offset
>= dwz
->str
.size
)
16730 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16731 ".debug_str section [in module %s]"),
16732 bfd_get_filename (dwz
->dwz_bfd
));
16733 gdb_assert (HOST_CHAR_BIT
== 8);
16734 if (dwz
->str
.buffer
[str_offset
] == '\0')
16736 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16739 static const char *
16740 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16741 const struct comp_unit_head
*cu_header
,
16742 unsigned int *bytes_read_ptr
)
16744 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16746 return read_indirect_string_at_offset (abfd
, str_offset
);
16750 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16751 unsigned int *bytes_read_ptr
)
16754 unsigned int num_read
;
16756 unsigned char byte
;
16763 byte
= bfd_get_8 (abfd
, buf
);
16766 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16767 if ((byte
& 128) == 0)
16773 *bytes_read_ptr
= num_read
;
16778 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16779 unsigned int *bytes_read_ptr
)
16782 int shift
, num_read
;
16783 unsigned char byte
;
16790 byte
= bfd_get_8 (abfd
, buf
);
16793 result
|= ((LONGEST
) (byte
& 127) << shift
);
16795 if ((byte
& 128) == 0)
16800 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16801 result
|= -(((LONGEST
) 1) << shift
);
16802 *bytes_read_ptr
= num_read
;
16806 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16807 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16808 ADDR_SIZE is the size of addresses from the CU header. */
16811 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16813 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16814 bfd
*abfd
= objfile
->obfd
;
16815 const gdb_byte
*info_ptr
;
16817 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16818 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16819 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16820 objfile_name (objfile
));
16821 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16822 error (_("DW_FORM_addr_index pointing outside of "
16823 ".debug_addr section [in module %s]"),
16824 objfile_name (objfile
));
16825 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16826 + addr_base
+ addr_index
* addr_size
);
16827 if (addr_size
== 4)
16828 return bfd_get_32 (abfd
, info_ptr
);
16830 return bfd_get_64 (abfd
, info_ptr
);
16833 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16836 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16838 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16841 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16844 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16845 unsigned int *bytes_read
)
16847 bfd
*abfd
= cu
->objfile
->obfd
;
16848 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16850 return read_addr_index (cu
, addr_index
);
16853 /* Data structure to pass results from dwarf2_read_addr_index_reader
16854 back to dwarf2_read_addr_index. */
16856 struct dwarf2_read_addr_index_data
16858 ULONGEST addr_base
;
16862 /* die_reader_func for dwarf2_read_addr_index. */
16865 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16866 const gdb_byte
*info_ptr
,
16867 struct die_info
*comp_unit_die
,
16871 struct dwarf2_cu
*cu
= reader
->cu
;
16872 struct dwarf2_read_addr_index_data
*aidata
=
16873 (struct dwarf2_read_addr_index_data
*) data
;
16875 aidata
->addr_base
= cu
->addr_base
;
16876 aidata
->addr_size
= cu
->header
.addr_size
;
16879 /* Given an index in .debug_addr, fetch the value.
16880 NOTE: This can be called during dwarf expression evaluation,
16881 long after the debug information has been read, and thus per_cu->cu
16882 may no longer exist. */
16885 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16886 unsigned int addr_index
)
16888 struct objfile
*objfile
= per_cu
->objfile
;
16889 struct dwarf2_cu
*cu
= per_cu
->cu
;
16890 ULONGEST addr_base
;
16893 /* This is intended to be called from outside this file. */
16894 dw2_setup (objfile
);
16896 /* We need addr_base and addr_size.
16897 If we don't have PER_CU->cu, we have to get it.
16898 Nasty, but the alternative is storing the needed info in PER_CU,
16899 which at this point doesn't seem justified: it's not clear how frequently
16900 it would get used and it would increase the size of every PER_CU.
16901 Entry points like dwarf2_per_cu_addr_size do a similar thing
16902 so we're not in uncharted territory here.
16903 Alas we need to be a bit more complicated as addr_base is contained
16906 We don't need to read the entire CU(/TU).
16907 We just need the header and top level die.
16909 IWBN to use the aging mechanism to let us lazily later discard the CU.
16910 For now we skip this optimization. */
16914 addr_base
= cu
->addr_base
;
16915 addr_size
= cu
->header
.addr_size
;
16919 struct dwarf2_read_addr_index_data aidata
;
16921 /* Note: We can't use init_cutu_and_read_dies_simple here,
16922 we need addr_base. */
16923 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16924 dwarf2_read_addr_index_reader
, &aidata
);
16925 addr_base
= aidata
.addr_base
;
16926 addr_size
= aidata
.addr_size
;
16929 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16932 /* Given a DW_FORM_GNU_str_index, fetch the string.
16933 This is only used by the Fission support. */
16935 static const char *
16936 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16938 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16939 const char *objf_name
= objfile_name (objfile
);
16940 bfd
*abfd
= objfile
->obfd
;
16941 struct dwarf2_cu
*cu
= reader
->cu
;
16942 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16943 struct dwarf2_section_info
*str_offsets_section
=
16944 &reader
->dwo_file
->sections
.str_offsets
;
16945 const gdb_byte
*info_ptr
;
16946 ULONGEST str_offset
;
16947 static const char form_name
[] = "DW_FORM_GNU_str_index";
16949 dwarf2_read_section (objfile
, str_section
);
16950 dwarf2_read_section (objfile
, str_offsets_section
);
16951 if (str_section
->buffer
== NULL
)
16952 error (_("%s used without .debug_str.dwo section"
16953 " in CU at offset 0x%lx [in module %s]"),
16954 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16955 if (str_offsets_section
->buffer
== NULL
)
16956 error (_("%s used without .debug_str_offsets.dwo section"
16957 " in CU at offset 0x%lx [in module %s]"),
16958 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16959 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16960 error (_("%s pointing outside of .debug_str_offsets.dwo"
16961 " section in CU at offset 0x%lx [in module %s]"),
16962 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16963 info_ptr
= (str_offsets_section
->buffer
16964 + str_index
* cu
->header
.offset_size
);
16965 if (cu
->header
.offset_size
== 4)
16966 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16968 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16969 if (str_offset
>= str_section
->size
)
16970 error (_("Offset from %s pointing outside of"
16971 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16972 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16973 return (const char *) (str_section
->buffer
+ str_offset
);
16976 /* Return the length of an LEB128 number in BUF. */
16979 leb128_size (const gdb_byte
*buf
)
16981 const gdb_byte
*begin
= buf
;
16987 if ((byte
& 128) == 0)
16988 return buf
- begin
;
16993 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17002 cu
->language
= language_c
;
17004 case DW_LANG_C_plus_plus
:
17005 case DW_LANG_C_plus_plus_11
:
17006 case DW_LANG_C_plus_plus_14
:
17007 cu
->language
= language_cplus
;
17010 cu
->language
= language_d
;
17012 case DW_LANG_Fortran77
:
17013 case DW_LANG_Fortran90
:
17014 case DW_LANG_Fortran95
:
17015 case DW_LANG_Fortran03
:
17016 case DW_LANG_Fortran08
:
17017 cu
->language
= language_fortran
;
17020 cu
->language
= language_go
;
17022 case DW_LANG_Mips_Assembler
:
17023 cu
->language
= language_asm
;
17026 cu
->language
= language_java
;
17028 case DW_LANG_Ada83
:
17029 case DW_LANG_Ada95
:
17030 cu
->language
= language_ada
;
17032 case DW_LANG_Modula2
:
17033 cu
->language
= language_m2
;
17035 case DW_LANG_Pascal83
:
17036 cu
->language
= language_pascal
;
17039 cu
->language
= language_objc
;
17041 case DW_LANG_Cobol74
:
17042 case DW_LANG_Cobol85
:
17044 cu
->language
= language_minimal
;
17047 cu
->language_defn
= language_def (cu
->language
);
17050 /* Return the named attribute or NULL if not there. */
17052 static struct attribute
*
17053 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17058 struct attribute
*spec
= NULL
;
17060 for (i
= 0; i
< die
->num_attrs
; ++i
)
17062 if (die
->attrs
[i
].name
== name
)
17063 return &die
->attrs
[i
];
17064 if (die
->attrs
[i
].name
== DW_AT_specification
17065 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17066 spec
= &die
->attrs
[i
];
17072 die
= follow_die_ref (die
, spec
, &cu
);
17078 /* Return the named attribute or NULL if not there,
17079 but do not follow DW_AT_specification, etc.
17080 This is for use in contexts where we're reading .debug_types dies.
17081 Following DW_AT_specification, DW_AT_abstract_origin will take us
17082 back up the chain, and we want to go down. */
17084 static struct attribute
*
17085 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17089 for (i
= 0; i
< die
->num_attrs
; ++i
)
17090 if (die
->attrs
[i
].name
== name
)
17091 return &die
->attrs
[i
];
17096 /* Return the string associated with a string-typed attribute, or NULL if it
17097 is either not found or is of an incorrect type. */
17099 static const char *
17100 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17102 struct attribute
*attr
;
17103 const char *str
= NULL
;
17105 attr
= dwarf2_attr (die
, name
, cu
);
17109 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_string
17110 || attr
->form
== DW_FORM_GNU_strp_alt
)
17111 str
= DW_STRING (attr
);
17113 complaint (&symfile_complaints
,
17114 _("string type expected for attribute %s for "
17115 "DIE at 0x%x in module %s"),
17116 dwarf_attr_name (name
), die
->offset
.sect_off
,
17117 objfile_name (cu
->objfile
));
17123 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17124 and holds a non-zero value. This function should only be used for
17125 DW_FORM_flag or DW_FORM_flag_present attributes. */
17128 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17130 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17132 return (attr
&& DW_UNSND (attr
));
17136 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17138 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17139 which value is non-zero. However, we have to be careful with
17140 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17141 (via dwarf2_flag_true_p) follows this attribute. So we may
17142 end up accidently finding a declaration attribute that belongs
17143 to a different DIE referenced by the specification attribute,
17144 even though the given DIE does not have a declaration attribute. */
17145 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17146 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17149 /* Return the die giving the specification for DIE, if there is
17150 one. *SPEC_CU is the CU containing DIE on input, and the CU
17151 containing the return value on output. If there is no
17152 specification, but there is an abstract origin, that is
17155 static struct die_info
*
17156 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17158 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17161 if (spec_attr
== NULL
)
17162 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17164 if (spec_attr
== NULL
)
17167 return follow_die_ref (die
, spec_attr
, spec_cu
);
17170 /* Free the line_header structure *LH, and any arrays and strings it
17172 NOTE: This is also used as a "cleanup" function. */
17175 free_line_header (struct line_header
*lh
)
17177 if (lh
->standard_opcode_lengths
)
17178 xfree (lh
->standard_opcode_lengths
);
17180 /* Remember that all the lh->file_names[i].name pointers are
17181 pointers into debug_line_buffer, and don't need to be freed. */
17182 if (lh
->file_names
)
17183 xfree (lh
->file_names
);
17185 /* Similarly for the include directory names. */
17186 if (lh
->include_dirs
)
17187 xfree (lh
->include_dirs
);
17192 /* Stub for free_line_header to match void * callback types. */
17195 free_line_header_voidp (void *arg
)
17197 struct line_header
*lh
= (struct line_header
*) arg
;
17199 free_line_header (lh
);
17202 /* Add an entry to LH's include directory table. */
17205 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17207 if (dwarf_line_debug
>= 2)
17208 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17209 lh
->num_include_dirs
+ 1, include_dir
);
17211 /* Grow the array if necessary. */
17212 if (lh
->include_dirs_size
== 0)
17214 lh
->include_dirs_size
= 1; /* for testing */
17215 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17217 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17219 lh
->include_dirs_size
*= 2;
17220 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17221 lh
->include_dirs_size
);
17224 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17227 /* Add an entry to LH's file name table. */
17230 add_file_name (struct line_header
*lh
,
17232 unsigned int dir_index
,
17233 unsigned int mod_time
,
17234 unsigned int length
)
17236 struct file_entry
*fe
;
17238 if (dwarf_line_debug
>= 2)
17239 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17240 lh
->num_file_names
+ 1, name
);
17242 /* Grow the array if necessary. */
17243 if (lh
->file_names_size
== 0)
17245 lh
->file_names_size
= 1; /* for testing */
17246 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17248 else if (lh
->num_file_names
>= lh
->file_names_size
)
17250 lh
->file_names_size
*= 2;
17252 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17255 fe
= &lh
->file_names
[lh
->num_file_names
++];
17257 fe
->dir_index
= dir_index
;
17258 fe
->mod_time
= mod_time
;
17259 fe
->length
= length
;
17260 fe
->included_p
= 0;
17264 /* A convenience function to find the proper .debug_line section for a CU. */
17266 static struct dwarf2_section_info
*
17267 get_debug_line_section (struct dwarf2_cu
*cu
)
17269 struct dwarf2_section_info
*section
;
17271 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17273 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17274 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17275 else if (cu
->per_cu
->is_dwz
)
17277 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17279 section
= &dwz
->line
;
17282 section
= &dwarf2_per_objfile
->line
;
17287 /* Read the statement program header starting at OFFSET in
17288 .debug_line, or .debug_line.dwo. Return a pointer
17289 to a struct line_header, allocated using xmalloc.
17290 Returns NULL if there is a problem reading the header, e.g., if it
17291 has a version we don't understand.
17293 NOTE: the strings in the include directory and file name tables of
17294 the returned object point into the dwarf line section buffer,
17295 and must not be freed. */
17297 static struct line_header
*
17298 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17300 struct cleanup
*back_to
;
17301 struct line_header
*lh
;
17302 const gdb_byte
*line_ptr
;
17303 unsigned int bytes_read
, offset_size
;
17305 const char *cur_dir
, *cur_file
;
17306 struct dwarf2_section_info
*section
;
17309 section
= get_debug_line_section (cu
);
17310 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17311 if (section
->buffer
== NULL
)
17313 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17314 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17316 complaint (&symfile_complaints
, _("missing .debug_line section"));
17320 /* We can't do this until we know the section is non-empty.
17321 Only then do we know we have such a section. */
17322 abfd
= get_section_bfd_owner (section
);
17324 /* Make sure that at least there's room for the total_length field.
17325 That could be 12 bytes long, but we're just going to fudge that. */
17326 if (offset
+ 4 >= section
->size
)
17328 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17332 lh
= XNEW (struct line_header
);
17333 memset (lh
, 0, sizeof (*lh
));
17334 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17337 lh
->offset
.sect_off
= offset
;
17338 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17340 line_ptr
= section
->buffer
+ offset
;
17342 /* Read in the header. */
17344 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17345 &bytes_read
, &offset_size
);
17346 line_ptr
+= bytes_read
;
17347 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17349 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17350 do_cleanups (back_to
);
17353 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17354 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17356 if (lh
->version
> 4)
17358 /* This is a version we don't understand. The format could have
17359 changed in ways we don't handle properly so just punt. */
17360 complaint (&symfile_complaints
,
17361 _("unsupported version in .debug_line section"));
17364 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17365 line_ptr
+= offset_size
;
17366 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17368 if (lh
->version
>= 4)
17370 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17374 lh
->maximum_ops_per_instruction
= 1;
17376 if (lh
->maximum_ops_per_instruction
== 0)
17378 lh
->maximum_ops_per_instruction
= 1;
17379 complaint (&symfile_complaints
,
17380 _("invalid maximum_ops_per_instruction "
17381 "in `.debug_line' section"));
17384 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17386 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17388 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17390 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17392 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17394 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17395 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17397 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17401 /* Read directory table. */
17402 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17404 line_ptr
+= bytes_read
;
17405 add_include_dir (lh
, cur_dir
);
17407 line_ptr
+= bytes_read
;
17409 /* Read file name table. */
17410 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17412 unsigned int dir_index
, mod_time
, length
;
17414 line_ptr
+= bytes_read
;
17415 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17416 line_ptr
+= bytes_read
;
17417 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17418 line_ptr
+= bytes_read
;
17419 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17420 line_ptr
+= bytes_read
;
17422 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17424 line_ptr
+= bytes_read
;
17425 lh
->statement_program_start
= line_ptr
;
17427 if (line_ptr
> (section
->buffer
+ section
->size
))
17428 complaint (&symfile_complaints
,
17429 _("line number info header doesn't "
17430 "fit in `.debug_line' section"));
17432 discard_cleanups (back_to
);
17436 /* Subroutine of dwarf_decode_lines to simplify it.
17437 Return the file name of the psymtab for included file FILE_INDEX
17438 in line header LH of PST.
17439 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17440 If space for the result is malloc'd, it will be freed by a cleanup.
17441 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17443 The function creates dangling cleanup registration. */
17445 static const char *
17446 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17447 const struct partial_symtab
*pst
,
17448 const char *comp_dir
)
17450 const struct file_entry fe
= lh
->file_names
[file_index
];
17451 const char *include_name
= fe
.name
;
17452 const char *include_name_to_compare
= include_name
;
17453 const char *dir_name
= NULL
;
17454 const char *pst_filename
;
17455 char *copied_name
= NULL
;
17458 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17459 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17461 if (!IS_ABSOLUTE_PATH (include_name
)
17462 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17464 /* Avoid creating a duplicate psymtab for PST.
17465 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17466 Before we do the comparison, however, we need to account
17467 for DIR_NAME and COMP_DIR.
17468 First prepend dir_name (if non-NULL). If we still don't
17469 have an absolute path prepend comp_dir (if non-NULL).
17470 However, the directory we record in the include-file's
17471 psymtab does not contain COMP_DIR (to match the
17472 corresponding symtab(s)).
17477 bash$ gcc -g ./hello.c
17478 include_name = "hello.c"
17480 DW_AT_comp_dir = comp_dir = "/tmp"
17481 DW_AT_name = "./hello.c"
17485 if (dir_name
!= NULL
)
17487 char *tem
= concat (dir_name
, SLASH_STRING
,
17488 include_name
, (char *)NULL
);
17490 make_cleanup (xfree
, tem
);
17491 include_name
= tem
;
17492 include_name_to_compare
= include_name
;
17494 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17496 char *tem
= concat (comp_dir
, SLASH_STRING
,
17497 include_name
, (char *)NULL
);
17499 make_cleanup (xfree
, tem
);
17500 include_name_to_compare
= tem
;
17504 pst_filename
= pst
->filename
;
17505 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17507 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17508 pst_filename
, (char *)NULL
);
17509 pst_filename
= copied_name
;
17512 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17514 if (copied_name
!= NULL
)
17515 xfree (copied_name
);
17519 return include_name
;
17522 /* State machine to track the state of the line number program. */
17526 /* These are part of the standard DWARF line number state machine. */
17528 unsigned char op_index
;
17533 unsigned int discriminator
;
17535 /* Additional bits of state we need to track. */
17537 /* The last file that we called dwarf2_start_subfile for.
17538 This is only used for TLLs. */
17539 unsigned int last_file
;
17540 /* The last file a line number was recorded for. */
17541 struct subfile
*last_subfile
;
17543 /* The function to call to record a line. */
17544 record_line_ftype
*record_line
;
17546 /* The last line number that was recorded, used to coalesce
17547 consecutive entries for the same line. This can happen, for
17548 example, when discriminators are present. PR 17276. */
17549 unsigned int last_line
;
17550 int line_has_non_zero_discriminator
;
17551 } lnp_state_machine
;
17553 /* There's a lot of static state to pass to dwarf_record_line.
17554 This keeps it all together. */
17559 struct gdbarch
*gdbarch
;
17561 /* The line number header. */
17562 struct line_header
*line_header
;
17564 /* Non-zero if we're recording lines.
17565 Otherwise we're building partial symtabs and are just interested in
17566 finding include files mentioned by the line number program. */
17567 int record_lines_p
;
17568 } lnp_reader_state
;
17570 /* Ignore this record_line request. */
17573 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17578 /* Return non-zero if we should add LINE to the line number table.
17579 LINE is the line to add, LAST_LINE is the last line that was added,
17580 LAST_SUBFILE is the subfile for LAST_LINE.
17581 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17582 had a non-zero discriminator.
17584 We have to be careful in the presence of discriminators.
17585 E.g., for this line:
17587 for (i = 0; i < 100000; i++);
17589 clang can emit four line number entries for that one line,
17590 each with a different discriminator.
17591 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17593 However, we want gdb to coalesce all four entries into one.
17594 Otherwise the user could stepi into the middle of the line and
17595 gdb would get confused about whether the pc really was in the
17596 middle of the line.
17598 Things are further complicated by the fact that two consecutive
17599 line number entries for the same line is a heuristic used by gcc
17600 to denote the end of the prologue. So we can't just discard duplicate
17601 entries, we have to be selective about it. The heuristic we use is
17602 that we only collapse consecutive entries for the same line if at least
17603 one of those entries has a non-zero discriminator. PR 17276.
17605 Note: Addresses in the line number state machine can never go backwards
17606 within one sequence, thus this coalescing is ok. */
17609 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17610 int line_has_non_zero_discriminator
,
17611 struct subfile
*last_subfile
)
17613 if (current_subfile
!= last_subfile
)
17615 if (line
!= last_line
)
17617 /* Same line for the same file that we've seen already.
17618 As a last check, for pr 17276, only record the line if the line
17619 has never had a non-zero discriminator. */
17620 if (!line_has_non_zero_discriminator
)
17625 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17626 in the line table of subfile SUBFILE. */
17629 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17630 unsigned int line
, CORE_ADDR address
,
17631 record_line_ftype p_record_line
)
17633 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17635 if (dwarf_line_debug
)
17637 fprintf_unfiltered (gdb_stdlog
,
17638 "Recording line %u, file %s, address %s\n",
17639 line
, lbasename (subfile
->name
),
17640 paddress (gdbarch
, address
));
17643 (*p_record_line
) (subfile
, line
, addr
);
17646 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17647 Mark the end of a set of line number records.
17648 The arguments are the same as for dwarf_record_line_1.
17649 If SUBFILE is NULL the request is ignored. */
17652 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17653 CORE_ADDR address
, record_line_ftype p_record_line
)
17655 if (subfile
== NULL
)
17658 if (dwarf_line_debug
)
17660 fprintf_unfiltered (gdb_stdlog
,
17661 "Finishing current line, file %s, address %s\n",
17662 lbasename (subfile
->name
),
17663 paddress (gdbarch
, address
));
17666 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17669 /* Record the line in STATE.
17670 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17673 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17676 const struct line_header
*lh
= reader
->line_header
;
17677 unsigned int file
, line
, discriminator
;
17680 file
= state
->file
;
17681 line
= state
->line
;
17682 is_stmt
= state
->is_stmt
;
17683 discriminator
= state
->discriminator
;
17685 if (dwarf_line_debug
)
17687 fprintf_unfiltered (gdb_stdlog
,
17688 "Processing actual line %u: file %u,"
17689 " address %s, is_stmt %u, discrim %u\n",
17691 paddress (reader
->gdbarch
, state
->address
),
17692 is_stmt
, discriminator
);
17695 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17696 dwarf2_debug_line_missing_file_complaint ();
17697 /* For now we ignore lines not starting on an instruction boundary.
17698 But not when processing end_sequence for compatibility with the
17699 previous version of the code. */
17700 else if (state
->op_index
== 0 || end_sequence
)
17702 lh
->file_names
[file
- 1].included_p
= 1;
17703 if (reader
->record_lines_p
&& is_stmt
)
17705 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17707 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17708 state
->address
, state
->record_line
);
17713 if (dwarf_record_line_p (line
, state
->last_line
,
17714 state
->line_has_non_zero_discriminator
,
17715 state
->last_subfile
))
17717 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17718 line
, state
->address
,
17719 state
->record_line
);
17721 state
->last_subfile
= current_subfile
;
17722 state
->last_line
= line
;
17728 /* Initialize STATE for the start of a line number program. */
17731 init_lnp_state_machine (lnp_state_machine
*state
,
17732 const lnp_reader_state
*reader
)
17734 memset (state
, 0, sizeof (*state
));
17736 /* Just starting, there is no "last file". */
17737 state
->last_file
= 0;
17738 state
->last_subfile
= NULL
;
17740 state
->record_line
= record_line
;
17742 state
->last_line
= 0;
17743 state
->line_has_non_zero_discriminator
= 0;
17745 /* Initialize these according to the DWARF spec. */
17746 state
->op_index
= 0;
17749 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17750 was a line entry for it so that the backend has a chance to adjust it
17751 and also record it in case it needs it. This is currently used by MIPS
17752 code, cf. `mips_adjust_dwarf2_line'. */
17753 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17754 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17755 state
->discriminator
= 0;
17758 /* Check address and if invalid nop-out the rest of the lines in this
17762 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17763 const gdb_byte
*line_ptr
,
17764 CORE_ADDR lowpc
, CORE_ADDR address
)
17766 /* If address < lowpc then it's not a usable value, it's outside the
17767 pc range of the CU. However, we restrict the test to only address
17768 values of zero to preserve GDB's previous behaviour which is to
17769 handle the specific case of a function being GC'd by the linker. */
17771 if (address
== 0 && address
< lowpc
)
17773 /* This line table is for a function which has been
17774 GCd by the linker. Ignore it. PR gdb/12528 */
17776 struct objfile
*objfile
= cu
->objfile
;
17777 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17779 complaint (&symfile_complaints
,
17780 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17781 line_offset
, objfile_name (objfile
));
17782 state
->record_line
= noop_record_line
;
17783 /* Note: sm.record_line is left as noop_record_line
17784 until we see DW_LNE_end_sequence. */
17788 /* Subroutine of dwarf_decode_lines to simplify it.
17789 Process the line number information in LH.
17790 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17791 program in order to set included_p for every referenced header. */
17794 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17795 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17797 const gdb_byte
*line_ptr
, *extended_end
;
17798 const gdb_byte
*line_end
;
17799 unsigned int bytes_read
, extended_len
;
17800 unsigned char op_code
, extended_op
;
17801 CORE_ADDR baseaddr
;
17802 struct objfile
*objfile
= cu
->objfile
;
17803 bfd
*abfd
= objfile
->obfd
;
17804 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17805 /* Non-zero if we're recording line info (as opposed to building partial
17807 int record_lines_p
= !decode_for_pst_p
;
17808 /* A collection of things we need to pass to dwarf_record_line. */
17809 lnp_reader_state reader_state
;
17811 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17813 line_ptr
= lh
->statement_program_start
;
17814 line_end
= lh
->statement_program_end
;
17816 reader_state
.gdbarch
= gdbarch
;
17817 reader_state
.line_header
= lh
;
17818 reader_state
.record_lines_p
= record_lines_p
;
17820 /* Read the statement sequences until there's nothing left. */
17821 while (line_ptr
< line_end
)
17823 /* The DWARF line number program state machine. */
17824 lnp_state_machine state_machine
;
17825 int end_sequence
= 0;
17827 /* Reset the state machine at the start of each sequence. */
17828 init_lnp_state_machine (&state_machine
, &reader_state
);
17830 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17832 /* Start a subfile for the current file of the state machine. */
17833 /* lh->include_dirs and lh->file_names are 0-based, but the
17834 directory and file name numbers in the statement program
17836 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17837 const char *dir
= NULL
;
17839 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17840 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17842 dwarf2_start_subfile (fe
->name
, dir
);
17845 /* Decode the table. */
17846 while (line_ptr
< line_end
&& !end_sequence
)
17848 op_code
= read_1_byte (abfd
, line_ptr
);
17851 if (op_code
>= lh
->opcode_base
)
17853 /* Special opcode. */
17854 unsigned char adj_opcode
;
17855 CORE_ADDR addr_adj
;
17858 adj_opcode
= op_code
- lh
->opcode_base
;
17859 addr_adj
= (((state_machine
.op_index
17860 + (adj_opcode
/ lh
->line_range
))
17861 / lh
->maximum_ops_per_instruction
)
17862 * lh
->minimum_instruction_length
);
17863 state_machine
.address
17864 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17865 state_machine
.op_index
= ((state_machine
.op_index
17866 + (adj_opcode
/ lh
->line_range
))
17867 % lh
->maximum_ops_per_instruction
);
17868 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17869 state_machine
.line
+= line_delta
;
17870 if (line_delta
!= 0)
17871 state_machine
.line_has_non_zero_discriminator
17872 = state_machine
.discriminator
!= 0;
17874 dwarf_record_line (&reader_state
, &state_machine
, 0);
17875 state_machine
.discriminator
= 0;
17877 else switch (op_code
)
17879 case DW_LNS_extended_op
:
17880 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17882 line_ptr
+= bytes_read
;
17883 extended_end
= line_ptr
+ extended_len
;
17884 extended_op
= read_1_byte (abfd
, line_ptr
);
17886 switch (extended_op
)
17888 case DW_LNE_end_sequence
:
17889 state_machine
.record_line
= record_line
;
17892 case DW_LNE_set_address
:
17895 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17897 line_ptr
+= bytes_read
;
17898 check_line_address (cu
, &state_machine
, line_ptr
,
17900 state_machine
.op_index
= 0;
17901 address
+= baseaddr
;
17902 state_machine
.address
17903 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17906 case DW_LNE_define_file
:
17908 const char *cur_file
;
17909 unsigned int dir_index
, mod_time
, length
;
17911 cur_file
= read_direct_string (abfd
, line_ptr
,
17913 line_ptr
+= bytes_read
;
17915 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17916 line_ptr
+= bytes_read
;
17918 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17919 line_ptr
+= bytes_read
;
17921 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17922 line_ptr
+= bytes_read
;
17923 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17926 case DW_LNE_set_discriminator
:
17927 /* The discriminator is not interesting to the debugger;
17928 just ignore it. We still need to check its value though:
17929 if there are consecutive entries for the same
17930 (non-prologue) line we want to coalesce them.
17932 state_machine
.discriminator
17933 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17934 state_machine
.line_has_non_zero_discriminator
17935 |= state_machine
.discriminator
!= 0;
17936 line_ptr
+= bytes_read
;
17939 complaint (&symfile_complaints
,
17940 _("mangled .debug_line section"));
17943 /* Make sure that we parsed the extended op correctly. If e.g.
17944 we expected a different address size than the producer used,
17945 we may have read the wrong number of bytes. */
17946 if (line_ptr
!= extended_end
)
17948 complaint (&symfile_complaints
,
17949 _("mangled .debug_line section"));
17954 dwarf_record_line (&reader_state
, &state_machine
, 0);
17955 state_machine
.discriminator
= 0;
17957 case DW_LNS_advance_pc
:
17960 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17961 CORE_ADDR addr_adj
;
17963 addr_adj
= (((state_machine
.op_index
+ adjust
)
17964 / lh
->maximum_ops_per_instruction
)
17965 * lh
->minimum_instruction_length
);
17966 state_machine
.address
17967 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17968 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17969 % lh
->maximum_ops_per_instruction
);
17970 line_ptr
+= bytes_read
;
17973 case DW_LNS_advance_line
:
17976 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17978 state_machine
.line
+= line_delta
;
17979 if (line_delta
!= 0)
17980 state_machine
.line_has_non_zero_discriminator
17981 = state_machine
.discriminator
!= 0;
17982 line_ptr
+= bytes_read
;
17985 case DW_LNS_set_file
:
17987 /* The arrays lh->include_dirs and lh->file_names are
17988 0-based, but the directory and file name numbers in
17989 the statement program are 1-based. */
17990 struct file_entry
*fe
;
17991 const char *dir
= NULL
;
17993 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
17995 line_ptr
+= bytes_read
;
17996 if (state_machine
.file
== 0
17997 || state_machine
.file
- 1 >= lh
->num_file_names
)
17998 dwarf2_debug_line_missing_file_complaint ();
18001 fe
= &lh
->file_names
[state_machine
.file
- 1];
18002 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18003 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18004 if (record_lines_p
)
18006 state_machine
.last_subfile
= current_subfile
;
18007 state_machine
.line_has_non_zero_discriminator
18008 = state_machine
.discriminator
!= 0;
18009 dwarf2_start_subfile (fe
->name
, dir
);
18014 case DW_LNS_set_column
:
18015 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18016 line_ptr
+= bytes_read
;
18018 case DW_LNS_negate_stmt
:
18019 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18021 case DW_LNS_set_basic_block
:
18023 /* Add to the address register of the state machine the
18024 address increment value corresponding to special opcode
18025 255. I.e., this value is scaled by the minimum
18026 instruction length since special opcode 255 would have
18027 scaled the increment. */
18028 case DW_LNS_const_add_pc
:
18030 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18031 CORE_ADDR addr_adj
;
18033 addr_adj
= (((state_machine
.op_index
+ adjust
)
18034 / lh
->maximum_ops_per_instruction
)
18035 * lh
->minimum_instruction_length
);
18036 state_machine
.address
18037 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18038 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18039 % lh
->maximum_ops_per_instruction
);
18042 case DW_LNS_fixed_advance_pc
:
18044 CORE_ADDR addr_adj
;
18046 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18047 state_machine
.address
18048 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18049 state_machine
.op_index
= 0;
18055 /* Unknown standard opcode, ignore it. */
18058 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18060 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18061 line_ptr
+= bytes_read
;
18068 dwarf2_debug_line_missing_end_sequence_complaint ();
18070 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18071 in which case we still finish recording the last line). */
18072 dwarf_record_line (&reader_state
, &state_machine
, 1);
18076 /* Decode the Line Number Program (LNP) for the given line_header
18077 structure and CU. The actual information extracted and the type
18078 of structures created from the LNP depends on the value of PST.
18080 1. If PST is NULL, then this procedure uses the data from the program
18081 to create all necessary symbol tables, and their linetables.
18083 2. If PST is not NULL, this procedure reads the program to determine
18084 the list of files included by the unit represented by PST, and
18085 builds all the associated partial symbol tables.
18087 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18088 It is used for relative paths in the line table.
18089 NOTE: When processing partial symtabs (pst != NULL),
18090 comp_dir == pst->dirname.
18092 NOTE: It is important that psymtabs have the same file name (via strcmp)
18093 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18094 symtab we don't use it in the name of the psymtabs we create.
18095 E.g. expand_line_sal requires this when finding psymtabs to expand.
18096 A good testcase for this is mb-inline.exp.
18098 LOWPC is the lowest address in CU (or 0 if not known).
18100 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18101 for its PC<->lines mapping information. Otherwise only the filename
18102 table is read in. */
18105 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18106 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18107 CORE_ADDR lowpc
, int decode_mapping
)
18109 struct objfile
*objfile
= cu
->objfile
;
18110 const int decode_for_pst_p
= (pst
!= NULL
);
18112 if (decode_mapping
)
18113 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18115 if (decode_for_pst_p
)
18119 /* Now that we're done scanning the Line Header Program, we can
18120 create the psymtab of each included file. */
18121 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18122 if (lh
->file_names
[file_index
].included_p
== 1)
18124 const char *include_name
=
18125 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18126 if (include_name
!= NULL
)
18127 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18132 /* Make sure a symtab is created for every file, even files
18133 which contain only variables (i.e. no code with associated
18135 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18138 for (i
= 0; i
< lh
->num_file_names
; i
++)
18140 const char *dir
= NULL
;
18141 struct file_entry
*fe
;
18143 fe
= &lh
->file_names
[i
];
18144 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18145 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18146 dwarf2_start_subfile (fe
->name
, dir
);
18148 if (current_subfile
->symtab
== NULL
)
18150 current_subfile
->symtab
18151 = allocate_symtab (cust
, current_subfile
->name
);
18153 fe
->symtab
= current_subfile
->symtab
;
18158 /* Start a subfile for DWARF. FILENAME is the name of the file and
18159 DIRNAME the name of the source directory which contains FILENAME
18160 or NULL if not known.
18161 This routine tries to keep line numbers from identical absolute and
18162 relative file names in a common subfile.
18164 Using the `list' example from the GDB testsuite, which resides in
18165 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18166 of /srcdir/list0.c yields the following debugging information for list0.c:
18168 DW_AT_name: /srcdir/list0.c
18169 DW_AT_comp_dir: /compdir
18170 files.files[0].name: list0.h
18171 files.files[0].dir: /srcdir
18172 files.files[1].name: list0.c
18173 files.files[1].dir: /srcdir
18175 The line number information for list0.c has to end up in a single
18176 subfile, so that `break /srcdir/list0.c:1' works as expected.
18177 start_subfile will ensure that this happens provided that we pass the
18178 concatenation of files.files[1].dir and files.files[1].name as the
18182 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18186 /* In order not to lose the line information directory,
18187 we concatenate it to the filename when it makes sense.
18188 Note that the Dwarf3 standard says (speaking of filenames in line
18189 information): ``The directory index is ignored for file names
18190 that represent full path names''. Thus ignoring dirname in the
18191 `else' branch below isn't an issue. */
18193 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18195 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18199 start_subfile (filename
);
18205 /* Start a symtab for DWARF.
18206 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18208 static struct compunit_symtab
*
18209 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18210 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18212 struct compunit_symtab
*cust
18213 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18215 record_debugformat ("DWARF 2");
18216 record_producer (cu
->producer
);
18218 /* We assume that we're processing GCC output. */
18219 processing_gcc_compilation
= 2;
18221 cu
->processing_has_namespace_info
= 0;
18227 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18228 struct dwarf2_cu
*cu
)
18230 struct objfile
*objfile
= cu
->objfile
;
18231 struct comp_unit_head
*cu_header
= &cu
->header
;
18233 /* NOTE drow/2003-01-30: There used to be a comment and some special
18234 code here to turn a symbol with DW_AT_external and a
18235 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18236 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18237 with some versions of binutils) where shared libraries could have
18238 relocations against symbols in their debug information - the
18239 minimal symbol would have the right address, but the debug info
18240 would not. It's no longer necessary, because we will explicitly
18241 apply relocations when we read in the debug information now. */
18243 /* A DW_AT_location attribute with no contents indicates that a
18244 variable has been optimized away. */
18245 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18247 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18251 /* Handle one degenerate form of location expression specially, to
18252 preserve GDB's previous behavior when section offsets are
18253 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18254 then mark this symbol as LOC_STATIC. */
18256 if (attr_form_is_block (attr
)
18257 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18258 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18259 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18260 && (DW_BLOCK (attr
)->size
18261 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18263 unsigned int dummy
;
18265 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18266 SYMBOL_VALUE_ADDRESS (sym
) =
18267 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18269 SYMBOL_VALUE_ADDRESS (sym
) =
18270 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18271 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18272 fixup_symbol_section (sym
, objfile
);
18273 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18274 SYMBOL_SECTION (sym
));
18278 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18279 expression evaluator, and use LOC_COMPUTED only when necessary
18280 (i.e. when the value of a register or memory location is
18281 referenced, or a thread-local block, etc.). Then again, it might
18282 not be worthwhile. I'm assuming that it isn't unless performance
18283 or memory numbers show me otherwise. */
18285 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18287 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18288 cu
->has_loclist
= 1;
18291 /* Given a pointer to a DWARF information entry, figure out if we need
18292 to make a symbol table entry for it, and if so, create a new entry
18293 and return a pointer to it.
18294 If TYPE is NULL, determine symbol type from the die, otherwise
18295 used the passed type.
18296 If SPACE is not NULL, use it to hold the new symbol. If it is
18297 NULL, allocate a new symbol on the objfile's obstack. */
18299 static struct symbol
*
18300 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18301 struct symbol
*space
)
18303 struct objfile
*objfile
= cu
->objfile
;
18304 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18305 struct symbol
*sym
= NULL
;
18307 struct attribute
*attr
= NULL
;
18308 struct attribute
*attr2
= NULL
;
18309 CORE_ADDR baseaddr
;
18310 struct pending
**list_to_add
= NULL
;
18312 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18314 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18316 name
= dwarf2_name (die
, cu
);
18319 const char *linkagename
;
18320 int suppress_add
= 0;
18325 sym
= allocate_symbol (objfile
);
18326 OBJSTAT (objfile
, n_syms
++);
18328 /* Cache this symbol's name and the name's demangled form (if any). */
18329 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18330 linkagename
= dwarf2_physname (name
, die
, cu
);
18331 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18333 /* Fortran does not have mangling standard and the mangling does differ
18334 between gfortran, iFort etc. */
18335 if (cu
->language
== language_fortran
18336 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18337 symbol_set_demangled_name (&(sym
->ginfo
),
18338 dwarf2_full_name (name
, die
, cu
),
18341 /* Default assumptions.
18342 Use the passed type or decode it from the die. */
18343 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18344 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18346 SYMBOL_TYPE (sym
) = type
;
18348 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18349 attr
= dwarf2_attr (die
,
18350 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18354 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18357 attr
= dwarf2_attr (die
,
18358 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18362 int file_index
= DW_UNSND (attr
);
18364 if (cu
->line_header
== NULL
18365 || file_index
> cu
->line_header
->num_file_names
)
18366 complaint (&symfile_complaints
,
18367 _("file index out of range"));
18368 else if (file_index
> 0)
18370 struct file_entry
*fe
;
18372 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18373 symbol_set_symtab (sym
, fe
->symtab
);
18380 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18385 addr
= attr_value_as_address (attr
);
18386 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18387 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18389 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18390 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18391 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18392 add_symbol_to_list (sym
, cu
->list_in_scope
);
18394 case DW_TAG_subprogram
:
18395 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18397 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18398 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18399 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18400 || cu
->language
== language_ada
)
18402 /* Subprograms marked external are stored as a global symbol.
18403 Ada subprograms, whether marked external or not, are always
18404 stored as a global symbol, because we want to be able to
18405 access them globally. For instance, we want to be able
18406 to break on a nested subprogram without having to
18407 specify the context. */
18408 list_to_add
= &global_symbols
;
18412 list_to_add
= cu
->list_in_scope
;
18415 case DW_TAG_inlined_subroutine
:
18416 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18418 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18419 SYMBOL_INLINED (sym
) = 1;
18420 list_to_add
= cu
->list_in_scope
;
18422 case DW_TAG_template_value_param
:
18424 /* Fall through. */
18425 case DW_TAG_constant
:
18426 case DW_TAG_variable
:
18427 case DW_TAG_member
:
18428 /* Compilation with minimal debug info may result in
18429 variables with missing type entries. Change the
18430 misleading `void' type to something sensible. */
18431 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18433 = objfile_type (objfile
)->nodebug_data_symbol
;
18435 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18436 /* In the case of DW_TAG_member, we should only be called for
18437 static const members. */
18438 if (die
->tag
== DW_TAG_member
)
18440 /* dwarf2_add_field uses die_is_declaration,
18441 so we do the same. */
18442 gdb_assert (die_is_declaration (die
, cu
));
18447 dwarf2_const_value (attr
, sym
, cu
);
18448 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18451 if (attr2
&& (DW_UNSND (attr2
) != 0))
18452 list_to_add
= &global_symbols
;
18454 list_to_add
= cu
->list_in_scope
;
18458 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18461 var_decode_location (attr
, sym
, cu
);
18462 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18464 /* Fortran explicitly imports any global symbols to the local
18465 scope by DW_TAG_common_block. */
18466 if (cu
->language
== language_fortran
&& die
->parent
18467 && die
->parent
->tag
== DW_TAG_common_block
)
18470 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18471 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18472 && !dwarf2_per_objfile
->has_section_at_zero
)
18474 /* When a static variable is eliminated by the linker,
18475 the corresponding debug information is not stripped
18476 out, but the variable address is set to null;
18477 do not add such variables into symbol table. */
18479 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18481 /* Workaround gfortran PR debug/40040 - it uses
18482 DW_AT_location for variables in -fPIC libraries which may
18483 get overriden by other libraries/executable and get
18484 a different address. Resolve it by the minimal symbol
18485 which may come from inferior's executable using copy
18486 relocation. Make this workaround only for gfortran as for
18487 other compilers GDB cannot guess the minimal symbol
18488 Fortran mangling kind. */
18489 if (cu
->language
== language_fortran
&& die
->parent
18490 && die
->parent
->tag
== DW_TAG_module
18492 && startswith (cu
->producer
, "GNU Fortran"))
18493 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18495 /* A variable with DW_AT_external is never static,
18496 but it may be block-scoped. */
18497 list_to_add
= (cu
->list_in_scope
== &file_symbols
18498 ? &global_symbols
: cu
->list_in_scope
);
18501 list_to_add
= cu
->list_in_scope
;
18505 /* We do not know the address of this symbol.
18506 If it is an external symbol and we have type information
18507 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18508 The address of the variable will then be determined from
18509 the minimal symbol table whenever the variable is
18511 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18513 /* Fortran explicitly imports any global symbols to the local
18514 scope by DW_TAG_common_block. */
18515 if (cu
->language
== language_fortran
&& die
->parent
18516 && die
->parent
->tag
== DW_TAG_common_block
)
18518 /* SYMBOL_CLASS doesn't matter here because
18519 read_common_block is going to reset it. */
18521 list_to_add
= cu
->list_in_scope
;
18523 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18524 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18526 /* A variable with DW_AT_external is never static, but it
18527 may be block-scoped. */
18528 list_to_add
= (cu
->list_in_scope
== &file_symbols
18529 ? &global_symbols
: cu
->list_in_scope
);
18531 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18533 else if (!die_is_declaration (die
, cu
))
18535 /* Use the default LOC_OPTIMIZED_OUT class. */
18536 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18538 list_to_add
= cu
->list_in_scope
;
18542 case DW_TAG_formal_parameter
:
18543 /* If we are inside a function, mark this as an argument. If
18544 not, we might be looking at an argument to an inlined function
18545 when we do not have enough information to show inlined frames;
18546 pretend it's a local variable in that case so that the user can
18548 if (context_stack_depth
> 0
18549 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18550 SYMBOL_IS_ARGUMENT (sym
) = 1;
18551 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18554 var_decode_location (attr
, sym
, cu
);
18556 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18559 dwarf2_const_value (attr
, sym
, cu
);
18562 list_to_add
= cu
->list_in_scope
;
18564 case DW_TAG_unspecified_parameters
:
18565 /* From varargs functions; gdb doesn't seem to have any
18566 interest in this information, so just ignore it for now.
18569 case DW_TAG_template_type_param
:
18571 /* Fall through. */
18572 case DW_TAG_class_type
:
18573 case DW_TAG_interface_type
:
18574 case DW_TAG_structure_type
:
18575 case DW_TAG_union_type
:
18576 case DW_TAG_set_type
:
18577 case DW_TAG_enumeration_type
:
18578 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18579 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18582 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18583 really ever be static objects: otherwise, if you try
18584 to, say, break of a class's method and you're in a file
18585 which doesn't mention that class, it won't work unless
18586 the check for all static symbols in lookup_symbol_aux
18587 saves you. See the OtherFileClass tests in
18588 gdb.c++/namespace.exp. */
18592 list_to_add
= (cu
->list_in_scope
== &file_symbols
18593 && (cu
->language
== language_cplus
18594 || cu
->language
== language_java
)
18595 ? &global_symbols
: cu
->list_in_scope
);
18597 /* The semantics of C++ state that "struct foo {
18598 ... }" also defines a typedef for "foo". A Java
18599 class declaration also defines a typedef for the
18601 if (cu
->language
== language_cplus
18602 || cu
->language
== language_java
18603 || cu
->language
== language_ada
18604 || cu
->language
== language_d
)
18606 /* The symbol's name is already allocated along
18607 with this objfile, so we don't need to
18608 duplicate it for the type. */
18609 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18610 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18615 case DW_TAG_typedef
:
18616 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18617 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18618 list_to_add
= cu
->list_in_scope
;
18620 case DW_TAG_base_type
:
18621 case DW_TAG_subrange_type
:
18622 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18623 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18624 list_to_add
= cu
->list_in_scope
;
18626 case DW_TAG_enumerator
:
18627 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18630 dwarf2_const_value (attr
, sym
, cu
);
18633 /* NOTE: carlton/2003-11-10: See comment above in the
18634 DW_TAG_class_type, etc. block. */
18636 list_to_add
= (cu
->list_in_scope
== &file_symbols
18637 && (cu
->language
== language_cplus
18638 || cu
->language
== language_java
)
18639 ? &global_symbols
: cu
->list_in_scope
);
18642 case DW_TAG_imported_declaration
:
18643 case DW_TAG_namespace
:
18644 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18645 list_to_add
= &global_symbols
;
18647 case DW_TAG_module
:
18648 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18649 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18650 list_to_add
= &global_symbols
;
18652 case DW_TAG_common_block
:
18653 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18654 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18655 add_symbol_to_list (sym
, cu
->list_in_scope
);
18658 /* Not a tag we recognize. Hopefully we aren't processing
18659 trash data, but since we must specifically ignore things
18660 we don't recognize, there is nothing else we should do at
18662 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18663 dwarf_tag_name (die
->tag
));
18669 sym
->hash_next
= objfile
->template_symbols
;
18670 objfile
->template_symbols
= sym
;
18671 list_to_add
= NULL
;
18674 if (list_to_add
!= NULL
)
18675 add_symbol_to_list (sym
, list_to_add
);
18677 /* For the benefit of old versions of GCC, check for anonymous
18678 namespaces based on the demangled name. */
18679 if (!cu
->processing_has_namespace_info
18680 && cu
->language
== language_cplus
)
18681 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18686 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18688 static struct symbol
*
18689 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18691 return new_symbol_full (die
, type
, cu
, NULL
);
18694 /* Given an attr with a DW_FORM_dataN value in host byte order,
18695 zero-extend it as appropriate for the symbol's type. The DWARF
18696 standard (v4) is not entirely clear about the meaning of using
18697 DW_FORM_dataN for a constant with a signed type, where the type is
18698 wider than the data. The conclusion of a discussion on the DWARF
18699 list was that this is unspecified. We choose to always zero-extend
18700 because that is the interpretation long in use by GCC. */
18703 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18704 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18706 struct objfile
*objfile
= cu
->objfile
;
18707 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18708 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18709 LONGEST l
= DW_UNSND (attr
);
18711 if (bits
< sizeof (*value
) * 8)
18713 l
&= ((LONGEST
) 1 << bits
) - 1;
18716 else if (bits
== sizeof (*value
) * 8)
18720 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
18721 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18728 /* Read a constant value from an attribute. Either set *VALUE, or if
18729 the value does not fit in *VALUE, set *BYTES - either already
18730 allocated on the objfile obstack, or newly allocated on OBSTACK,
18731 or, set *BATON, if we translated the constant to a location
18735 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18736 const char *name
, struct obstack
*obstack
,
18737 struct dwarf2_cu
*cu
,
18738 LONGEST
*value
, const gdb_byte
**bytes
,
18739 struct dwarf2_locexpr_baton
**baton
)
18741 struct objfile
*objfile
= cu
->objfile
;
18742 struct comp_unit_head
*cu_header
= &cu
->header
;
18743 struct dwarf_block
*blk
;
18744 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18745 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18751 switch (attr
->form
)
18754 case DW_FORM_GNU_addr_index
:
18758 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18759 dwarf2_const_value_length_mismatch_complaint (name
,
18760 cu_header
->addr_size
,
18761 TYPE_LENGTH (type
));
18762 /* Symbols of this form are reasonably rare, so we just
18763 piggyback on the existing location code rather than writing
18764 a new implementation of symbol_computed_ops. */
18765 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
18766 (*baton
)->per_cu
= cu
->per_cu
;
18767 gdb_assert ((*baton
)->per_cu
);
18769 (*baton
)->size
= 2 + cu_header
->addr_size
;
18770 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
18771 (*baton
)->data
= data
;
18773 data
[0] = DW_OP_addr
;
18774 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18775 byte_order
, DW_ADDR (attr
));
18776 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18779 case DW_FORM_string
:
18781 case DW_FORM_GNU_str_index
:
18782 case DW_FORM_GNU_strp_alt
:
18783 /* DW_STRING is already allocated on the objfile obstack, point
18785 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18787 case DW_FORM_block1
:
18788 case DW_FORM_block2
:
18789 case DW_FORM_block4
:
18790 case DW_FORM_block
:
18791 case DW_FORM_exprloc
:
18792 blk
= DW_BLOCK (attr
);
18793 if (TYPE_LENGTH (type
) != blk
->size
)
18794 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18795 TYPE_LENGTH (type
));
18796 *bytes
= blk
->data
;
18799 /* The DW_AT_const_value attributes are supposed to carry the
18800 symbol's value "represented as it would be on the target
18801 architecture." By the time we get here, it's already been
18802 converted to host endianness, so we just need to sign- or
18803 zero-extend it as appropriate. */
18804 case DW_FORM_data1
:
18805 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18807 case DW_FORM_data2
:
18808 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18810 case DW_FORM_data4
:
18811 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18813 case DW_FORM_data8
:
18814 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18817 case DW_FORM_sdata
:
18818 *value
= DW_SND (attr
);
18821 case DW_FORM_udata
:
18822 *value
= DW_UNSND (attr
);
18826 complaint (&symfile_complaints
,
18827 _("unsupported const value attribute form: '%s'"),
18828 dwarf_form_name (attr
->form
));
18835 /* Copy constant value from an attribute to a symbol. */
18838 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18839 struct dwarf2_cu
*cu
)
18841 struct objfile
*objfile
= cu
->objfile
;
18843 const gdb_byte
*bytes
;
18844 struct dwarf2_locexpr_baton
*baton
;
18846 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18847 SYMBOL_PRINT_NAME (sym
),
18848 &objfile
->objfile_obstack
, cu
,
18849 &value
, &bytes
, &baton
);
18853 SYMBOL_LOCATION_BATON (sym
) = baton
;
18854 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18856 else if (bytes
!= NULL
)
18858 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18859 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18863 SYMBOL_VALUE (sym
) = value
;
18864 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18868 /* Return the type of the die in question using its DW_AT_type attribute. */
18870 static struct type
*
18871 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18873 struct attribute
*type_attr
;
18875 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18878 /* A missing DW_AT_type represents a void type. */
18879 return objfile_type (cu
->objfile
)->builtin_void
;
18882 return lookup_die_type (die
, type_attr
, cu
);
18885 /* True iff CU's producer generates GNAT Ada auxiliary information
18886 that allows to find parallel types through that information instead
18887 of having to do expensive parallel lookups by type name. */
18890 need_gnat_info (struct dwarf2_cu
*cu
)
18892 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18893 of GNAT produces this auxiliary information, without any indication
18894 that it is produced. Part of enhancing the FSF version of GNAT
18895 to produce that information will be to put in place an indicator
18896 that we can use in order to determine whether the descriptive type
18897 info is available or not. One suggestion that has been made is
18898 to use a new attribute, attached to the CU die. For now, assume
18899 that the descriptive type info is not available. */
18903 /* Return the auxiliary type of the die in question using its
18904 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18905 attribute is not present. */
18907 static struct type
*
18908 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18910 struct attribute
*type_attr
;
18912 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18916 return lookup_die_type (die
, type_attr
, cu
);
18919 /* If DIE has a descriptive_type attribute, then set the TYPE's
18920 descriptive type accordingly. */
18923 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18924 struct dwarf2_cu
*cu
)
18926 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18928 if (descriptive_type
)
18930 ALLOCATE_GNAT_AUX_TYPE (type
);
18931 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18935 /* Return the containing type of the die in question using its
18936 DW_AT_containing_type attribute. */
18938 static struct type
*
18939 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18941 struct attribute
*type_attr
;
18943 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18945 error (_("Dwarf Error: Problem turning containing type into gdb type "
18946 "[in module %s]"), objfile_name (cu
->objfile
));
18948 return lookup_die_type (die
, type_attr
, cu
);
18951 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18953 static struct type
*
18954 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18956 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18957 char *message
, *saved
;
18959 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18960 objfile_name (objfile
),
18961 cu
->header
.offset
.sect_off
,
18962 die
->offset
.sect_off
);
18963 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
18964 message
, strlen (message
));
18967 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18970 /* Look up the type of DIE in CU using its type attribute ATTR.
18971 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18972 DW_AT_containing_type.
18973 If there is no type substitute an error marker. */
18975 static struct type
*
18976 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18977 struct dwarf2_cu
*cu
)
18979 struct objfile
*objfile
= cu
->objfile
;
18980 struct type
*this_type
;
18982 gdb_assert (attr
->name
== DW_AT_type
18983 || attr
->name
== DW_AT_GNAT_descriptive_type
18984 || attr
->name
== DW_AT_containing_type
);
18986 /* First see if we have it cached. */
18988 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18990 struct dwarf2_per_cu_data
*per_cu
;
18991 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18993 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18994 this_type
= get_die_type_at_offset (offset
, per_cu
);
18996 else if (attr_form_is_ref (attr
))
18998 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19000 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
19002 else if (attr
->form
== DW_FORM_ref_sig8
)
19004 ULONGEST signature
= DW_SIGNATURE (attr
);
19006 return get_signatured_type (die
, signature
, cu
);
19010 complaint (&symfile_complaints
,
19011 _("Dwarf Error: Bad type attribute %s in DIE"
19012 " at 0x%x [in module %s]"),
19013 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
19014 objfile_name (objfile
));
19015 return build_error_marker_type (cu
, die
);
19018 /* If not cached we need to read it in. */
19020 if (this_type
== NULL
)
19022 struct die_info
*type_die
= NULL
;
19023 struct dwarf2_cu
*type_cu
= cu
;
19025 if (attr_form_is_ref (attr
))
19026 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19027 if (type_die
== NULL
)
19028 return build_error_marker_type (cu
, die
);
19029 /* If we find the type now, it's probably because the type came
19030 from an inter-CU reference and the type's CU got expanded before
19032 this_type
= read_type_die (type_die
, type_cu
);
19035 /* If we still don't have a type use an error marker. */
19037 if (this_type
== NULL
)
19038 return build_error_marker_type (cu
, die
);
19043 /* Return the type in DIE, CU.
19044 Returns NULL for invalid types.
19046 This first does a lookup in die_type_hash,
19047 and only reads the die in if necessary.
19049 NOTE: This can be called when reading in partial or full symbols. */
19051 static struct type
*
19052 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19054 struct type
*this_type
;
19056 this_type
= get_die_type (die
, cu
);
19060 return read_type_die_1 (die
, cu
);
19063 /* Read the type in DIE, CU.
19064 Returns NULL for invalid types. */
19066 static struct type
*
19067 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19069 struct type
*this_type
= NULL
;
19073 case DW_TAG_class_type
:
19074 case DW_TAG_interface_type
:
19075 case DW_TAG_structure_type
:
19076 case DW_TAG_union_type
:
19077 this_type
= read_structure_type (die
, cu
);
19079 case DW_TAG_enumeration_type
:
19080 this_type
= read_enumeration_type (die
, cu
);
19082 case DW_TAG_subprogram
:
19083 case DW_TAG_subroutine_type
:
19084 case DW_TAG_inlined_subroutine
:
19085 this_type
= read_subroutine_type (die
, cu
);
19087 case DW_TAG_array_type
:
19088 this_type
= read_array_type (die
, cu
);
19090 case DW_TAG_set_type
:
19091 this_type
= read_set_type (die
, cu
);
19093 case DW_TAG_pointer_type
:
19094 this_type
= read_tag_pointer_type (die
, cu
);
19096 case DW_TAG_ptr_to_member_type
:
19097 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19099 case DW_TAG_reference_type
:
19100 this_type
= read_tag_reference_type (die
, cu
);
19102 case DW_TAG_const_type
:
19103 this_type
= read_tag_const_type (die
, cu
);
19105 case DW_TAG_volatile_type
:
19106 this_type
= read_tag_volatile_type (die
, cu
);
19108 case DW_TAG_restrict_type
:
19109 this_type
= read_tag_restrict_type (die
, cu
);
19111 case DW_TAG_string_type
:
19112 this_type
= read_tag_string_type (die
, cu
);
19114 case DW_TAG_typedef
:
19115 this_type
= read_typedef (die
, cu
);
19117 case DW_TAG_subrange_type
:
19118 this_type
= read_subrange_type (die
, cu
);
19120 case DW_TAG_base_type
:
19121 this_type
= read_base_type (die
, cu
);
19123 case DW_TAG_unspecified_type
:
19124 this_type
= read_unspecified_type (die
, cu
);
19126 case DW_TAG_namespace
:
19127 this_type
= read_namespace_type (die
, cu
);
19129 case DW_TAG_module
:
19130 this_type
= read_module_type (die
, cu
);
19132 case DW_TAG_atomic_type
:
19133 this_type
= read_tag_atomic_type (die
, cu
);
19136 complaint (&symfile_complaints
,
19137 _("unexpected tag in read_type_die: '%s'"),
19138 dwarf_tag_name (die
->tag
));
19145 /* See if we can figure out if the class lives in a namespace. We do
19146 this by looking for a member function; its demangled name will
19147 contain namespace info, if there is any.
19148 Return the computed name or NULL.
19149 Space for the result is allocated on the objfile's obstack.
19150 This is the full-die version of guess_partial_die_structure_name.
19151 In this case we know DIE has no useful parent. */
19154 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19156 struct die_info
*spec_die
;
19157 struct dwarf2_cu
*spec_cu
;
19158 struct die_info
*child
;
19161 spec_die
= die_specification (die
, &spec_cu
);
19162 if (spec_die
!= NULL
)
19168 for (child
= die
->child
;
19170 child
= child
->sibling
)
19172 if (child
->tag
== DW_TAG_subprogram
)
19174 const char *linkage_name
;
19176 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19177 if (linkage_name
== NULL
)
19178 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19180 if (linkage_name
!= NULL
)
19183 = language_class_name_from_physname (cu
->language_defn
,
19187 if (actual_name
!= NULL
)
19189 const char *die_name
= dwarf2_name (die
, cu
);
19191 if (die_name
!= NULL
19192 && strcmp (die_name
, actual_name
) != 0)
19194 /* Strip off the class name from the full name.
19195 We want the prefix. */
19196 int die_name_len
= strlen (die_name
);
19197 int actual_name_len
= strlen (actual_name
);
19199 /* Test for '::' as a sanity check. */
19200 if (actual_name_len
> die_name_len
+ 2
19201 && actual_name
[actual_name_len
19202 - die_name_len
- 1] == ':')
19203 name
= (char *) obstack_copy0 (
19204 &cu
->objfile
->per_bfd
->storage_obstack
,
19205 actual_name
, actual_name_len
- die_name_len
- 2);
19208 xfree (actual_name
);
19217 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19218 prefix part in such case. See
19219 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19222 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19224 struct attribute
*attr
;
19227 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19228 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19231 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19234 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19236 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19237 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19240 /* dwarf2_name had to be already called. */
19241 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19243 /* Strip the base name, keep any leading namespaces/classes. */
19244 base
= strrchr (DW_STRING (attr
), ':');
19245 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19248 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19250 &base
[-1] - DW_STRING (attr
));
19253 /* Return the name of the namespace/class that DIE is defined within,
19254 or "" if we can't tell. The caller should not xfree the result.
19256 For example, if we're within the method foo() in the following
19266 then determine_prefix on foo's die will return "N::C". */
19268 static const char *
19269 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19271 struct die_info
*parent
, *spec_die
;
19272 struct dwarf2_cu
*spec_cu
;
19273 struct type
*parent_type
;
19276 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19277 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
)
19280 retval
= anonymous_struct_prefix (die
, cu
);
19284 /* We have to be careful in the presence of DW_AT_specification.
19285 For example, with GCC 3.4, given the code
19289 // Definition of N::foo.
19293 then we'll have a tree of DIEs like this:
19295 1: DW_TAG_compile_unit
19296 2: DW_TAG_namespace // N
19297 3: DW_TAG_subprogram // declaration of N::foo
19298 4: DW_TAG_subprogram // definition of N::foo
19299 DW_AT_specification // refers to die #3
19301 Thus, when processing die #4, we have to pretend that we're in
19302 the context of its DW_AT_specification, namely the contex of die
19305 spec_die
= die_specification (die
, &spec_cu
);
19306 if (spec_die
== NULL
)
19307 parent
= die
->parent
;
19310 parent
= spec_die
->parent
;
19314 if (parent
== NULL
)
19316 else if (parent
->building_fullname
)
19319 const char *parent_name
;
19321 /* It has been seen on RealView 2.2 built binaries,
19322 DW_TAG_template_type_param types actually _defined_ as
19323 children of the parent class:
19326 template class <class Enum> Class{};
19327 Class<enum E> class_e;
19329 1: DW_TAG_class_type (Class)
19330 2: DW_TAG_enumeration_type (E)
19331 3: DW_TAG_enumerator (enum1:0)
19332 3: DW_TAG_enumerator (enum2:1)
19334 2: DW_TAG_template_type_param
19335 DW_AT_type DW_FORM_ref_udata (E)
19337 Besides being broken debug info, it can put GDB into an
19338 infinite loop. Consider:
19340 When we're building the full name for Class<E>, we'll start
19341 at Class, and go look over its template type parameters,
19342 finding E. We'll then try to build the full name of E, and
19343 reach here. We're now trying to build the full name of E,
19344 and look over the parent DIE for containing scope. In the
19345 broken case, if we followed the parent DIE of E, we'd again
19346 find Class, and once again go look at its template type
19347 arguments, etc., etc. Simply don't consider such parent die
19348 as source-level parent of this die (it can't be, the language
19349 doesn't allow it), and break the loop here. */
19350 name
= dwarf2_name (die
, cu
);
19351 parent_name
= dwarf2_name (parent
, cu
);
19352 complaint (&symfile_complaints
,
19353 _("template param type '%s' defined within parent '%s'"),
19354 name
? name
: "<unknown>",
19355 parent_name
? parent_name
: "<unknown>");
19359 switch (parent
->tag
)
19361 case DW_TAG_namespace
:
19362 parent_type
= read_type_die (parent
, cu
);
19363 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19364 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19365 Work around this problem here. */
19366 if (cu
->language
== language_cplus
19367 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19369 /* We give a name to even anonymous namespaces. */
19370 return TYPE_TAG_NAME (parent_type
);
19371 case DW_TAG_class_type
:
19372 case DW_TAG_interface_type
:
19373 case DW_TAG_structure_type
:
19374 case DW_TAG_union_type
:
19375 case DW_TAG_module
:
19376 parent_type
= read_type_die (parent
, cu
);
19377 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19378 return TYPE_TAG_NAME (parent_type
);
19380 /* An anonymous structure is only allowed non-static data
19381 members; no typedefs, no member functions, et cetera.
19382 So it does not need a prefix. */
19384 case DW_TAG_compile_unit
:
19385 case DW_TAG_partial_unit
:
19386 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19387 if (cu
->language
== language_cplus
19388 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19389 && die
->child
!= NULL
19390 && (die
->tag
== DW_TAG_class_type
19391 || die
->tag
== DW_TAG_structure_type
19392 || die
->tag
== DW_TAG_union_type
))
19394 char *name
= guess_full_die_structure_name (die
, cu
);
19399 case DW_TAG_enumeration_type
:
19400 parent_type
= read_type_die (parent
, cu
);
19401 if (TYPE_DECLARED_CLASS (parent_type
))
19403 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19404 return TYPE_TAG_NAME (parent_type
);
19407 /* Fall through. */
19409 return determine_prefix (parent
, cu
);
19413 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19414 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19415 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19416 an obconcat, otherwise allocate storage for the result. The CU argument is
19417 used to determine the language and hence, the appropriate separator. */
19419 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19422 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19423 int physname
, struct dwarf2_cu
*cu
)
19425 const char *lead
= "";
19428 if (suffix
== NULL
|| suffix
[0] == '\0'
19429 || prefix
== NULL
|| prefix
[0] == '\0')
19431 else if (cu
->language
== language_java
)
19433 else if (cu
->language
== language_d
)
19435 /* For D, the 'main' function could be defined in any module, but it
19436 should never be prefixed. */
19437 if (strcmp (suffix
, "D main") == 0)
19445 else if (cu
->language
== language_fortran
&& physname
)
19447 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19448 DW_AT_MIPS_linkage_name is preferred and used instead. */
19456 if (prefix
== NULL
)
19458 if (suffix
== NULL
)
19465 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19467 strcpy (retval
, lead
);
19468 strcat (retval
, prefix
);
19469 strcat (retval
, sep
);
19470 strcat (retval
, suffix
);
19475 /* We have an obstack. */
19476 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19480 /* Return sibling of die, NULL if no sibling. */
19482 static struct die_info
*
19483 sibling_die (struct die_info
*die
)
19485 return die
->sibling
;
19488 /* Get name of a die, return NULL if not found. */
19490 static const char *
19491 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19492 struct obstack
*obstack
)
19494 if (name
&& cu
->language
== language_cplus
)
19496 char *canon_name
= cp_canonicalize_string (name
);
19498 if (canon_name
!= NULL
)
19500 if (strcmp (canon_name
, name
) != 0)
19501 name
= (const char *) obstack_copy0 (obstack
, canon_name
,
19502 strlen (canon_name
));
19503 xfree (canon_name
);
19510 /* Get name of a die, return NULL if not found.
19511 Anonymous namespaces are converted to their magic string. */
19513 static const char *
19514 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19516 struct attribute
*attr
;
19518 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19519 if ((!attr
|| !DW_STRING (attr
))
19520 && die
->tag
!= DW_TAG_namespace
19521 && die
->tag
!= DW_TAG_class_type
19522 && die
->tag
!= DW_TAG_interface_type
19523 && die
->tag
!= DW_TAG_structure_type
19524 && die
->tag
!= DW_TAG_union_type
)
19529 case DW_TAG_compile_unit
:
19530 case DW_TAG_partial_unit
:
19531 /* Compilation units have a DW_AT_name that is a filename, not
19532 a source language identifier. */
19533 case DW_TAG_enumeration_type
:
19534 case DW_TAG_enumerator
:
19535 /* These tags always have simple identifiers already; no need
19536 to canonicalize them. */
19537 return DW_STRING (attr
);
19539 case DW_TAG_namespace
:
19540 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19541 return DW_STRING (attr
);
19542 return CP_ANONYMOUS_NAMESPACE_STR
;
19544 case DW_TAG_subprogram
:
19545 /* Java constructors will all be named "<init>", so return
19546 the class name when we see this special case. */
19547 if (cu
->language
== language_java
19548 && DW_STRING (attr
) != NULL
19549 && strcmp (DW_STRING (attr
), "<init>") == 0)
19551 struct dwarf2_cu
*spec_cu
= cu
;
19552 struct die_info
*spec_die
;
19554 /* GCJ will output '<init>' for Java constructor names.
19555 For this special case, return the name of the parent class. */
19557 /* GCJ may output subprogram DIEs with AT_specification set.
19558 If so, use the name of the specified DIE. */
19559 spec_die
= die_specification (die
, &spec_cu
);
19560 if (spec_die
!= NULL
)
19561 return dwarf2_name (spec_die
, spec_cu
);
19566 if (die
->tag
== DW_TAG_class_type
)
19567 return dwarf2_name (die
, cu
);
19569 while (die
->tag
!= DW_TAG_compile_unit
19570 && die
->tag
!= DW_TAG_partial_unit
);
19574 case DW_TAG_class_type
:
19575 case DW_TAG_interface_type
:
19576 case DW_TAG_structure_type
:
19577 case DW_TAG_union_type
:
19578 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19579 structures or unions. These were of the form "._%d" in GCC 4.1,
19580 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19581 and GCC 4.4. We work around this problem by ignoring these. */
19582 if (attr
&& DW_STRING (attr
)
19583 && (startswith (DW_STRING (attr
), "._")
19584 || startswith (DW_STRING (attr
), "<anonymous")))
19587 /* GCC might emit a nameless typedef that has a linkage name. See
19588 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19589 if (!attr
|| DW_STRING (attr
) == NULL
)
19591 char *demangled
= NULL
;
19593 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19595 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19597 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19600 /* Avoid demangling DW_STRING (attr) the second time on a second
19601 call for the same DIE. */
19602 if (!DW_STRING_IS_CANONICAL (attr
))
19603 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19609 /* FIXME: we already did this for the partial symbol... */
19612 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19613 demangled
, strlen (demangled
)));
19614 DW_STRING_IS_CANONICAL (attr
) = 1;
19617 /* Strip any leading namespaces/classes, keep only the base name.
19618 DW_AT_name for named DIEs does not contain the prefixes. */
19619 base
= strrchr (DW_STRING (attr
), ':');
19620 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19623 return DW_STRING (attr
);
19632 if (!DW_STRING_IS_CANONICAL (attr
))
19635 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19636 &cu
->objfile
->per_bfd
->storage_obstack
);
19637 DW_STRING_IS_CANONICAL (attr
) = 1;
19639 return DW_STRING (attr
);
19642 /* Return the die that this die in an extension of, or NULL if there
19643 is none. *EXT_CU is the CU containing DIE on input, and the CU
19644 containing the return value on output. */
19646 static struct die_info
*
19647 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19649 struct attribute
*attr
;
19651 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19655 return follow_die_ref (die
, attr
, ext_cu
);
19658 /* Convert a DIE tag into its string name. */
19660 static const char *
19661 dwarf_tag_name (unsigned tag
)
19663 const char *name
= get_DW_TAG_name (tag
);
19666 return "DW_TAG_<unknown>";
19671 /* Convert a DWARF attribute code into its string name. */
19673 static const char *
19674 dwarf_attr_name (unsigned attr
)
19678 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19679 if (attr
== DW_AT_MIPS_fde
)
19680 return "DW_AT_MIPS_fde";
19682 if (attr
== DW_AT_HP_block_index
)
19683 return "DW_AT_HP_block_index";
19686 name
= get_DW_AT_name (attr
);
19689 return "DW_AT_<unknown>";
19694 /* Convert a DWARF value form code into its string name. */
19696 static const char *
19697 dwarf_form_name (unsigned form
)
19699 const char *name
= get_DW_FORM_name (form
);
19702 return "DW_FORM_<unknown>";
19708 dwarf_bool_name (unsigned mybool
)
19716 /* Convert a DWARF type code into its string name. */
19718 static const char *
19719 dwarf_type_encoding_name (unsigned enc
)
19721 const char *name
= get_DW_ATE_name (enc
);
19724 return "DW_ATE_<unknown>";
19730 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19734 print_spaces (indent
, f
);
19735 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19736 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19738 if (die
->parent
!= NULL
)
19740 print_spaces (indent
, f
);
19741 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19742 die
->parent
->offset
.sect_off
);
19745 print_spaces (indent
, f
);
19746 fprintf_unfiltered (f
, " has children: %s\n",
19747 dwarf_bool_name (die
->child
!= NULL
));
19749 print_spaces (indent
, f
);
19750 fprintf_unfiltered (f
, " attributes:\n");
19752 for (i
= 0; i
< die
->num_attrs
; ++i
)
19754 print_spaces (indent
, f
);
19755 fprintf_unfiltered (f
, " %s (%s) ",
19756 dwarf_attr_name (die
->attrs
[i
].name
),
19757 dwarf_form_name (die
->attrs
[i
].form
));
19759 switch (die
->attrs
[i
].form
)
19762 case DW_FORM_GNU_addr_index
:
19763 fprintf_unfiltered (f
, "address: ");
19764 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19766 case DW_FORM_block2
:
19767 case DW_FORM_block4
:
19768 case DW_FORM_block
:
19769 case DW_FORM_block1
:
19770 fprintf_unfiltered (f
, "block: size %s",
19771 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19773 case DW_FORM_exprloc
:
19774 fprintf_unfiltered (f
, "expression: size %s",
19775 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19777 case DW_FORM_ref_addr
:
19778 fprintf_unfiltered (f
, "ref address: ");
19779 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19781 case DW_FORM_GNU_ref_alt
:
19782 fprintf_unfiltered (f
, "alt ref address: ");
19783 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19789 case DW_FORM_ref_udata
:
19790 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19791 (long) (DW_UNSND (&die
->attrs
[i
])));
19793 case DW_FORM_data1
:
19794 case DW_FORM_data2
:
19795 case DW_FORM_data4
:
19796 case DW_FORM_data8
:
19797 case DW_FORM_udata
:
19798 case DW_FORM_sdata
:
19799 fprintf_unfiltered (f
, "constant: %s",
19800 pulongest (DW_UNSND (&die
->attrs
[i
])));
19802 case DW_FORM_sec_offset
:
19803 fprintf_unfiltered (f
, "section offset: %s",
19804 pulongest (DW_UNSND (&die
->attrs
[i
])));
19806 case DW_FORM_ref_sig8
:
19807 fprintf_unfiltered (f
, "signature: %s",
19808 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19810 case DW_FORM_string
:
19812 case DW_FORM_GNU_str_index
:
19813 case DW_FORM_GNU_strp_alt
:
19814 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19815 DW_STRING (&die
->attrs
[i
])
19816 ? DW_STRING (&die
->attrs
[i
]) : "",
19817 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19820 if (DW_UNSND (&die
->attrs
[i
]))
19821 fprintf_unfiltered (f
, "flag: TRUE");
19823 fprintf_unfiltered (f
, "flag: FALSE");
19825 case DW_FORM_flag_present
:
19826 fprintf_unfiltered (f
, "flag: TRUE");
19828 case DW_FORM_indirect
:
19829 /* The reader will have reduced the indirect form to
19830 the "base form" so this form should not occur. */
19831 fprintf_unfiltered (f
,
19832 "unexpected attribute form: DW_FORM_indirect");
19835 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19836 die
->attrs
[i
].form
);
19839 fprintf_unfiltered (f
, "\n");
19844 dump_die_for_error (struct die_info
*die
)
19846 dump_die_shallow (gdb_stderr
, 0, die
);
19850 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19852 int indent
= level
* 4;
19854 gdb_assert (die
!= NULL
);
19856 if (level
>= max_level
)
19859 dump_die_shallow (f
, indent
, die
);
19861 if (die
->child
!= NULL
)
19863 print_spaces (indent
, f
);
19864 fprintf_unfiltered (f
, " Children:");
19865 if (level
+ 1 < max_level
)
19867 fprintf_unfiltered (f
, "\n");
19868 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19872 fprintf_unfiltered (f
,
19873 " [not printed, max nesting level reached]\n");
19877 if (die
->sibling
!= NULL
&& level
> 0)
19879 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19883 /* This is called from the pdie macro in gdbinit.in.
19884 It's not static so gcc will keep a copy callable from gdb. */
19887 dump_die (struct die_info
*die
, int max_level
)
19889 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19893 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19897 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19903 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19907 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19909 sect_offset retval
= { DW_UNSND (attr
) };
19911 if (attr_form_is_ref (attr
))
19914 retval
.sect_off
= 0;
19915 complaint (&symfile_complaints
,
19916 _("unsupported die ref attribute form: '%s'"),
19917 dwarf_form_name (attr
->form
));
19921 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19922 * the value held by the attribute is not constant. */
19925 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19927 if (attr
->form
== DW_FORM_sdata
)
19928 return DW_SND (attr
);
19929 else if (attr
->form
== DW_FORM_udata
19930 || attr
->form
== DW_FORM_data1
19931 || attr
->form
== DW_FORM_data2
19932 || attr
->form
== DW_FORM_data4
19933 || attr
->form
== DW_FORM_data8
)
19934 return DW_UNSND (attr
);
19937 complaint (&symfile_complaints
,
19938 _("Attribute value is not a constant (%s)"),
19939 dwarf_form_name (attr
->form
));
19940 return default_value
;
19944 /* Follow reference or signature attribute ATTR of SRC_DIE.
19945 On entry *REF_CU is the CU of SRC_DIE.
19946 On exit *REF_CU is the CU of the result. */
19948 static struct die_info
*
19949 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19950 struct dwarf2_cu
**ref_cu
)
19952 struct die_info
*die
;
19954 if (attr_form_is_ref (attr
))
19955 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19956 else if (attr
->form
== DW_FORM_ref_sig8
)
19957 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19960 dump_die_for_error (src_die
);
19961 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19962 objfile_name ((*ref_cu
)->objfile
));
19968 /* Follow reference OFFSET.
19969 On entry *REF_CU is the CU of the source die referencing OFFSET.
19970 On exit *REF_CU is the CU of the result.
19971 Returns NULL if OFFSET is invalid. */
19973 static struct die_info
*
19974 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19975 struct dwarf2_cu
**ref_cu
)
19977 struct die_info temp_die
;
19978 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19980 gdb_assert (cu
->per_cu
!= NULL
);
19984 if (cu
->per_cu
->is_debug_types
)
19986 /* .debug_types CUs cannot reference anything outside their CU.
19987 If they need to, they have to reference a signatured type via
19988 DW_FORM_ref_sig8. */
19989 if (! offset_in_cu_p (&cu
->header
, offset
))
19992 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19993 || ! offset_in_cu_p (&cu
->header
, offset
))
19995 struct dwarf2_per_cu_data
*per_cu
;
19997 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
20000 /* If necessary, add it to the queue and load its DIEs. */
20001 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
20002 load_full_comp_unit (per_cu
, cu
->language
);
20004 target_cu
= per_cu
->cu
;
20006 else if (cu
->dies
== NULL
)
20008 /* We're loading full DIEs during partial symbol reading. */
20009 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20010 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20013 *ref_cu
= target_cu
;
20014 temp_die
.offset
= offset
;
20015 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20016 &temp_die
, offset
.sect_off
);
20019 /* Follow reference attribute ATTR of SRC_DIE.
20020 On entry *REF_CU is the CU of SRC_DIE.
20021 On exit *REF_CU is the CU of the result. */
20023 static struct die_info
*
20024 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20025 struct dwarf2_cu
**ref_cu
)
20027 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20028 struct dwarf2_cu
*cu
= *ref_cu
;
20029 struct die_info
*die
;
20031 die
= follow_die_offset (offset
,
20032 (attr
->form
== DW_FORM_GNU_ref_alt
20033 || cu
->per_cu
->is_dwz
),
20036 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20037 "at 0x%x [in module %s]"),
20038 offset
.sect_off
, src_die
->offset
.sect_off
,
20039 objfile_name (cu
->objfile
));
20044 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20045 Returned value is intended for DW_OP_call*. Returned
20046 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20048 struct dwarf2_locexpr_baton
20049 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20050 struct dwarf2_per_cu_data
*per_cu
,
20051 CORE_ADDR (*get_frame_pc
) (void *baton
),
20054 struct dwarf2_cu
*cu
;
20055 struct die_info
*die
;
20056 struct attribute
*attr
;
20057 struct dwarf2_locexpr_baton retval
;
20059 dw2_setup (per_cu
->objfile
);
20061 if (per_cu
->cu
== NULL
)
20066 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20067 Instead just throw an error, not much else we can do. */
20068 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20069 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20072 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20074 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20075 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20077 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20080 /* DWARF: "If there is no such attribute, then there is no effect.".
20081 DATA is ignored if SIZE is 0. */
20083 retval
.data
= NULL
;
20086 else if (attr_form_is_section_offset (attr
))
20088 struct dwarf2_loclist_baton loclist_baton
;
20089 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20092 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20094 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20096 retval
.size
= size
;
20100 if (!attr_form_is_block (attr
))
20101 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20102 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20103 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20105 retval
.data
= DW_BLOCK (attr
)->data
;
20106 retval
.size
= DW_BLOCK (attr
)->size
;
20108 retval
.per_cu
= cu
->per_cu
;
20110 age_cached_comp_units ();
20115 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20118 struct dwarf2_locexpr_baton
20119 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20120 struct dwarf2_per_cu_data
*per_cu
,
20121 CORE_ADDR (*get_frame_pc
) (void *baton
),
20124 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20126 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20129 /* Write a constant of a given type as target-ordered bytes into
20132 static const gdb_byte
*
20133 write_constant_as_bytes (struct obstack
*obstack
,
20134 enum bfd_endian byte_order
,
20141 *len
= TYPE_LENGTH (type
);
20142 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20143 store_unsigned_integer (result
, *len
, byte_order
, value
);
20148 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20149 pointer to the constant bytes and set LEN to the length of the
20150 data. If memory is needed, allocate it on OBSTACK. If the DIE
20151 does not have a DW_AT_const_value, return NULL. */
20154 dwarf2_fetch_constant_bytes (sect_offset offset
,
20155 struct dwarf2_per_cu_data
*per_cu
,
20156 struct obstack
*obstack
,
20159 struct dwarf2_cu
*cu
;
20160 struct die_info
*die
;
20161 struct attribute
*attr
;
20162 const gdb_byte
*result
= NULL
;
20165 enum bfd_endian byte_order
;
20167 dw2_setup (per_cu
->objfile
);
20169 if (per_cu
->cu
== NULL
)
20174 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20175 Instead just throw an error, not much else we can do. */
20176 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20177 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20180 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20182 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20183 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20186 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20190 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20191 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20193 switch (attr
->form
)
20196 case DW_FORM_GNU_addr_index
:
20200 *len
= cu
->header
.addr_size
;
20201 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20202 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20206 case DW_FORM_string
:
20208 case DW_FORM_GNU_str_index
:
20209 case DW_FORM_GNU_strp_alt
:
20210 /* DW_STRING is already allocated on the objfile obstack, point
20212 result
= (const gdb_byte
*) DW_STRING (attr
);
20213 *len
= strlen (DW_STRING (attr
));
20215 case DW_FORM_block1
:
20216 case DW_FORM_block2
:
20217 case DW_FORM_block4
:
20218 case DW_FORM_block
:
20219 case DW_FORM_exprloc
:
20220 result
= DW_BLOCK (attr
)->data
;
20221 *len
= DW_BLOCK (attr
)->size
;
20224 /* The DW_AT_const_value attributes are supposed to carry the
20225 symbol's value "represented as it would be on the target
20226 architecture." By the time we get here, it's already been
20227 converted to host endianness, so we just need to sign- or
20228 zero-extend it as appropriate. */
20229 case DW_FORM_data1
:
20230 type
= die_type (die
, cu
);
20231 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20232 if (result
== NULL
)
20233 result
= write_constant_as_bytes (obstack
, byte_order
,
20236 case DW_FORM_data2
:
20237 type
= die_type (die
, cu
);
20238 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20239 if (result
== NULL
)
20240 result
= write_constant_as_bytes (obstack
, byte_order
,
20243 case DW_FORM_data4
:
20244 type
= die_type (die
, cu
);
20245 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20246 if (result
== NULL
)
20247 result
= write_constant_as_bytes (obstack
, byte_order
,
20250 case DW_FORM_data8
:
20251 type
= die_type (die
, cu
);
20252 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20253 if (result
== NULL
)
20254 result
= write_constant_as_bytes (obstack
, byte_order
,
20258 case DW_FORM_sdata
:
20259 type
= die_type (die
, cu
);
20260 result
= write_constant_as_bytes (obstack
, byte_order
,
20261 type
, DW_SND (attr
), len
);
20264 case DW_FORM_udata
:
20265 type
= die_type (die
, cu
);
20266 result
= write_constant_as_bytes (obstack
, byte_order
,
20267 type
, DW_UNSND (attr
), len
);
20271 complaint (&symfile_complaints
,
20272 _("unsupported const value attribute form: '%s'"),
20273 dwarf_form_name (attr
->form
));
20280 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20284 dwarf2_get_die_type (cu_offset die_offset
,
20285 struct dwarf2_per_cu_data
*per_cu
)
20287 sect_offset die_offset_sect
;
20289 dw2_setup (per_cu
->objfile
);
20291 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20292 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20295 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20296 On entry *REF_CU is the CU of SRC_DIE.
20297 On exit *REF_CU is the CU of the result.
20298 Returns NULL if the referenced DIE isn't found. */
20300 static struct die_info
*
20301 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20302 struct dwarf2_cu
**ref_cu
)
20304 struct die_info temp_die
;
20305 struct dwarf2_cu
*sig_cu
;
20306 struct die_info
*die
;
20308 /* While it might be nice to assert sig_type->type == NULL here,
20309 we can get here for DW_AT_imported_declaration where we need
20310 the DIE not the type. */
20312 /* If necessary, add it to the queue and load its DIEs. */
20314 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20315 read_signatured_type (sig_type
);
20317 sig_cu
= sig_type
->per_cu
.cu
;
20318 gdb_assert (sig_cu
!= NULL
);
20319 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20320 temp_die
.offset
= sig_type
->type_offset_in_section
;
20321 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20322 temp_die
.offset
.sect_off
);
20325 /* For .gdb_index version 7 keep track of included TUs.
20326 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20327 if (dwarf2_per_objfile
->index_table
!= NULL
20328 && dwarf2_per_objfile
->index_table
->version
<= 7)
20330 VEC_safe_push (dwarf2_per_cu_ptr
,
20331 (*ref_cu
)->per_cu
->imported_symtabs
,
20342 /* Follow signatured type referenced by ATTR in SRC_DIE.
20343 On entry *REF_CU is the CU of SRC_DIE.
20344 On exit *REF_CU is the CU of the result.
20345 The result is the DIE of the type.
20346 If the referenced type cannot be found an error is thrown. */
20348 static struct die_info
*
20349 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20350 struct dwarf2_cu
**ref_cu
)
20352 ULONGEST signature
= DW_SIGNATURE (attr
);
20353 struct signatured_type
*sig_type
;
20354 struct die_info
*die
;
20356 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20358 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20359 /* sig_type will be NULL if the signatured type is missing from
20361 if (sig_type
== NULL
)
20363 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20364 " from DIE at 0x%x [in module %s]"),
20365 hex_string (signature
), src_die
->offset
.sect_off
,
20366 objfile_name ((*ref_cu
)->objfile
));
20369 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20372 dump_die_for_error (src_die
);
20373 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20374 " from DIE at 0x%x [in module %s]"),
20375 hex_string (signature
), src_die
->offset
.sect_off
,
20376 objfile_name ((*ref_cu
)->objfile
));
20382 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20383 reading in and processing the type unit if necessary. */
20385 static struct type
*
20386 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20387 struct dwarf2_cu
*cu
)
20389 struct signatured_type
*sig_type
;
20390 struct dwarf2_cu
*type_cu
;
20391 struct die_info
*type_die
;
20394 sig_type
= lookup_signatured_type (cu
, signature
);
20395 /* sig_type will be NULL if the signatured type is missing from
20397 if (sig_type
== NULL
)
20399 complaint (&symfile_complaints
,
20400 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20401 " from DIE at 0x%x [in module %s]"),
20402 hex_string (signature
), die
->offset
.sect_off
,
20403 objfile_name (dwarf2_per_objfile
->objfile
));
20404 return build_error_marker_type (cu
, die
);
20407 /* If we already know the type we're done. */
20408 if (sig_type
->type
!= NULL
)
20409 return sig_type
->type
;
20412 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20413 if (type_die
!= NULL
)
20415 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20416 is created. This is important, for example, because for c++ classes
20417 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20418 type
= read_type_die (type_die
, type_cu
);
20421 complaint (&symfile_complaints
,
20422 _("Dwarf Error: Cannot build signatured type %s"
20423 " referenced from DIE at 0x%x [in module %s]"),
20424 hex_string (signature
), die
->offset
.sect_off
,
20425 objfile_name (dwarf2_per_objfile
->objfile
));
20426 type
= build_error_marker_type (cu
, die
);
20431 complaint (&symfile_complaints
,
20432 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20433 " from DIE at 0x%x [in module %s]"),
20434 hex_string (signature
), die
->offset
.sect_off
,
20435 objfile_name (dwarf2_per_objfile
->objfile
));
20436 type
= build_error_marker_type (cu
, die
);
20438 sig_type
->type
= type
;
20443 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20444 reading in and processing the type unit if necessary. */
20446 static struct type
*
20447 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20448 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20450 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20451 if (attr_form_is_ref (attr
))
20453 struct dwarf2_cu
*type_cu
= cu
;
20454 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20456 return read_type_die (type_die
, type_cu
);
20458 else if (attr
->form
== DW_FORM_ref_sig8
)
20460 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20464 complaint (&symfile_complaints
,
20465 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20466 " at 0x%x [in module %s]"),
20467 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20468 objfile_name (dwarf2_per_objfile
->objfile
));
20469 return build_error_marker_type (cu
, die
);
20473 /* Load the DIEs associated with type unit PER_CU into memory. */
20476 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20478 struct signatured_type
*sig_type
;
20480 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20481 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20483 /* We have the per_cu, but we need the signatured_type.
20484 Fortunately this is an easy translation. */
20485 gdb_assert (per_cu
->is_debug_types
);
20486 sig_type
= (struct signatured_type
*) per_cu
;
20488 gdb_assert (per_cu
->cu
== NULL
);
20490 read_signatured_type (sig_type
);
20492 gdb_assert (per_cu
->cu
!= NULL
);
20495 /* die_reader_func for read_signatured_type.
20496 This is identical to load_full_comp_unit_reader,
20497 but is kept separate for now. */
20500 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20501 const gdb_byte
*info_ptr
,
20502 struct die_info
*comp_unit_die
,
20506 struct dwarf2_cu
*cu
= reader
->cu
;
20508 gdb_assert (cu
->die_hash
== NULL
);
20510 htab_create_alloc_ex (cu
->header
.length
/ 12,
20514 &cu
->comp_unit_obstack
,
20515 hashtab_obstack_allocate
,
20516 dummy_obstack_deallocate
);
20519 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20520 &info_ptr
, comp_unit_die
);
20521 cu
->dies
= comp_unit_die
;
20522 /* comp_unit_die is not stored in die_hash, no need. */
20524 /* We try not to read any attributes in this function, because not
20525 all CUs needed for references have been loaded yet, and symbol
20526 table processing isn't initialized. But we have to set the CU language,
20527 or we won't be able to build types correctly.
20528 Similarly, if we do not read the producer, we can not apply
20529 producer-specific interpretation. */
20530 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20533 /* Read in a signatured type and build its CU and DIEs.
20534 If the type is a stub for the real type in a DWO file,
20535 read in the real type from the DWO file as well. */
20538 read_signatured_type (struct signatured_type
*sig_type
)
20540 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20542 gdb_assert (per_cu
->is_debug_types
);
20543 gdb_assert (per_cu
->cu
== NULL
);
20545 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20546 read_signatured_type_reader
, NULL
);
20547 sig_type
->per_cu
.tu_read
= 1;
20550 /* Decode simple location descriptions.
20551 Given a pointer to a dwarf block that defines a location, compute
20552 the location and return the value.
20554 NOTE drow/2003-11-18: This function is called in two situations
20555 now: for the address of static or global variables (partial symbols
20556 only) and for offsets into structures which are expected to be
20557 (more or less) constant. The partial symbol case should go away,
20558 and only the constant case should remain. That will let this
20559 function complain more accurately. A few special modes are allowed
20560 without complaint for global variables (for instance, global
20561 register values and thread-local values).
20563 A location description containing no operations indicates that the
20564 object is optimized out. The return value is 0 for that case.
20565 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20566 callers will only want a very basic result and this can become a
20569 Note that stack[0] is unused except as a default error return. */
20572 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20574 struct objfile
*objfile
= cu
->objfile
;
20576 size_t size
= blk
->size
;
20577 const gdb_byte
*data
= blk
->data
;
20578 CORE_ADDR stack
[64];
20580 unsigned int bytes_read
, unsnd
;
20586 stack
[++stacki
] = 0;
20625 stack
[++stacki
] = op
- DW_OP_lit0
;
20660 stack
[++stacki
] = op
- DW_OP_reg0
;
20662 dwarf2_complex_location_expr_complaint ();
20666 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20668 stack
[++stacki
] = unsnd
;
20670 dwarf2_complex_location_expr_complaint ();
20674 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20679 case DW_OP_const1u
:
20680 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20684 case DW_OP_const1s
:
20685 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20689 case DW_OP_const2u
:
20690 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20694 case DW_OP_const2s
:
20695 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20699 case DW_OP_const4u
:
20700 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20704 case DW_OP_const4s
:
20705 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20709 case DW_OP_const8u
:
20710 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20715 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20721 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20726 stack
[stacki
+ 1] = stack
[stacki
];
20731 stack
[stacki
- 1] += stack
[stacki
];
20735 case DW_OP_plus_uconst
:
20736 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20742 stack
[stacki
- 1] -= stack
[stacki
];
20747 /* If we're not the last op, then we definitely can't encode
20748 this using GDB's address_class enum. This is valid for partial
20749 global symbols, although the variable's address will be bogus
20752 dwarf2_complex_location_expr_complaint ();
20755 case DW_OP_GNU_push_tls_address
:
20756 /* The top of the stack has the offset from the beginning
20757 of the thread control block at which the variable is located. */
20758 /* Nothing should follow this operator, so the top of stack would
20760 /* This is valid for partial global symbols, but the variable's
20761 address will be bogus in the psymtab. Make it always at least
20762 non-zero to not look as a variable garbage collected by linker
20763 which have DW_OP_addr 0. */
20765 dwarf2_complex_location_expr_complaint ();
20769 case DW_OP_GNU_uninit
:
20772 case DW_OP_GNU_addr_index
:
20773 case DW_OP_GNU_const_index
:
20774 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20781 const char *name
= get_DW_OP_name (op
);
20784 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20787 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20791 return (stack
[stacki
]);
20794 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20795 outside of the allocated space. Also enforce minimum>0. */
20796 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20798 complaint (&symfile_complaints
,
20799 _("location description stack overflow"));
20805 complaint (&symfile_complaints
,
20806 _("location description stack underflow"));
20810 return (stack
[stacki
]);
20813 /* memory allocation interface */
20815 static struct dwarf_block
*
20816 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20818 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
20821 static struct die_info
*
20822 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20824 struct die_info
*die
;
20825 size_t size
= sizeof (struct die_info
);
20828 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20830 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20831 memset (die
, 0, sizeof (struct die_info
));
20836 /* Macro support. */
20838 /* Return file name relative to the compilation directory of file number I in
20839 *LH's file name table. The result is allocated using xmalloc; the caller is
20840 responsible for freeing it. */
20843 file_file_name (int file
, struct line_header
*lh
)
20845 /* Is the file number a valid index into the line header's file name
20846 table? Remember that file numbers start with one, not zero. */
20847 if (1 <= file
&& file
<= lh
->num_file_names
)
20849 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20851 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20852 || lh
->include_dirs
== NULL
)
20853 return xstrdup (fe
->name
);
20854 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20855 fe
->name
, (char *) NULL
);
20859 /* The compiler produced a bogus file number. We can at least
20860 record the macro definitions made in the file, even if we
20861 won't be able to find the file by name. */
20862 char fake_name
[80];
20864 xsnprintf (fake_name
, sizeof (fake_name
),
20865 "<bad macro file number %d>", file
);
20867 complaint (&symfile_complaints
,
20868 _("bad file number in macro information (%d)"),
20871 return xstrdup (fake_name
);
20875 /* Return the full name of file number I in *LH's file name table.
20876 Use COMP_DIR as the name of the current directory of the
20877 compilation. The result is allocated using xmalloc; the caller is
20878 responsible for freeing it. */
20880 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20882 /* Is the file number a valid index into the line header's file name
20883 table? Remember that file numbers start with one, not zero. */
20884 if (1 <= file
&& file
<= lh
->num_file_names
)
20886 char *relative
= file_file_name (file
, lh
);
20888 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20890 return reconcat (relative
, comp_dir
, SLASH_STRING
,
20891 relative
, (char *) NULL
);
20894 return file_file_name (file
, lh
);
20898 static struct macro_source_file
*
20899 macro_start_file (int file
, int line
,
20900 struct macro_source_file
*current_file
,
20901 struct line_header
*lh
)
20903 /* File name relative to the compilation directory of this source file. */
20904 char *file_name
= file_file_name (file
, lh
);
20906 if (! current_file
)
20908 /* Note: We don't create a macro table for this compilation unit
20909 at all until we actually get a filename. */
20910 struct macro_table
*macro_table
= get_macro_table ();
20912 /* If we have no current file, then this must be the start_file
20913 directive for the compilation unit's main source file. */
20914 current_file
= macro_set_main (macro_table
, file_name
);
20915 macro_define_special (macro_table
);
20918 current_file
= macro_include (current_file
, line
, file_name
);
20922 return current_file
;
20926 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20927 followed by a null byte. */
20929 copy_string (const char *buf
, int len
)
20931 char *s
= (char *) xmalloc (len
+ 1);
20933 memcpy (s
, buf
, len
);
20939 static const char *
20940 consume_improper_spaces (const char *p
, const char *body
)
20944 complaint (&symfile_complaints
,
20945 _("macro definition contains spaces "
20946 "in formal argument list:\n`%s'"),
20958 parse_macro_definition (struct macro_source_file
*file
, int line
,
20963 /* The body string takes one of two forms. For object-like macro
20964 definitions, it should be:
20966 <macro name> " " <definition>
20968 For function-like macro definitions, it should be:
20970 <macro name> "() " <definition>
20972 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20974 Spaces may appear only where explicitly indicated, and in the
20977 The Dwarf 2 spec says that an object-like macro's name is always
20978 followed by a space, but versions of GCC around March 2002 omit
20979 the space when the macro's definition is the empty string.
20981 The Dwarf 2 spec says that there should be no spaces between the
20982 formal arguments in a function-like macro's formal argument list,
20983 but versions of GCC around March 2002 include spaces after the
20987 /* Find the extent of the macro name. The macro name is terminated
20988 by either a space or null character (for an object-like macro) or
20989 an opening paren (for a function-like macro). */
20990 for (p
= body
; *p
; p
++)
20991 if (*p
== ' ' || *p
== '(')
20994 if (*p
== ' ' || *p
== '\0')
20996 /* It's an object-like macro. */
20997 int name_len
= p
- body
;
20998 char *name
= copy_string (body
, name_len
);
20999 const char *replacement
;
21002 replacement
= body
+ name_len
+ 1;
21005 dwarf2_macro_malformed_definition_complaint (body
);
21006 replacement
= body
+ name_len
;
21009 macro_define_object (file
, line
, name
, replacement
);
21013 else if (*p
== '(')
21015 /* It's a function-like macro. */
21016 char *name
= copy_string (body
, p
- body
);
21019 char **argv
= XNEWVEC (char *, argv_size
);
21023 p
= consume_improper_spaces (p
, body
);
21025 /* Parse the formal argument list. */
21026 while (*p
&& *p
!= ')')
21028 /* Find the extent of the current argument name. */
21029 const char *arg_start
= p
;
21031 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21034 if (! *p
|| p
== arg_start
)
21035 dwarf2_macro_malformed_definition_complaint (body
);
21038 /* Make sure argv has room for the new argument. */
21039 if (argc
>= argv_size
)
21042 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21045 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21048 p
= consume_improper_spaces (p
, body
);
21050 /* Consume the comma, if present. */
21055 p
= consume_improper_spaces (p
, body
);
21064 /* Perfectly formed definition, no complaints. */
21065 macro_define_function (file
, line
, name
,
21066 argc
, (const char **) argv
,
21068 else if (*p
== '\0')
21070 /* Complain, but do define it. */
21071 dwarf2_macro_malformed_definition_complaint (body
);
21072 macro_define_function (file
, line
, name
,
21073 argc
, (const char **) argv
,
21077 /* Just complain. */
21078 dwarf2_macro_malformed_definition_complaint (body
);
21081 /* Just complain. */
21082 dwarf2_macro_malformed_definition_complaint (body
);
21088 for (i
= 0; i
< argc
; i
++)
21094 dwarf2_macro_malformed_definition_complaint (body
);
21097 /* Skip some bytes from BYTES according to the form given in FORM.
21098 Returns the new pointer. */
21100 static const gdb_byte
*
21101 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21102 enum dwarf_form form
,
21103 unsigned int offset_size
,
21104 struct dwarf2_section_info
*section
)
21106 unsigned int bytes_read
;
21110 case DW_FORM_data1
:
21115 case DW_FORM_data2
:
21119 case DW_FORM_data4
:
21123 case DW_FORM_data8
:
21127 case DW_FORM_string
:
21128 read_direct_string (abfd
, bytes
, &bytes_read
);
21129 bytes
+= bytes_read
;
21132 case DW_FORM_sec_offset
:
21134 case DW_FORM_GNU_strp_alt
:
21135 bytes
+= offset_size
;
21138 case DW_FORM_block
:
21139 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21140 bytes
+= bytes_read
;
21143 case DW_FORM_block1
:
21144 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21146 case DW_FORM_block2
:
21147 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21149 case DW_FORM_block4
:
21150 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21153 case DW_FORM_sdata
:
21154 case DW_FORM_udata
:
21155 case DW_FORM_GNU_addr_index
:
21156 case DW_FORM_GNU_str_index
:
21157 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21160 dwarf2_section_buffer_overflow_complaint (section
);
21168 complaint (&symfile_complaints
,
21169 _("invalid form 0x%x in `%s'"),
21170 form
, get_section_name (section
));
21178 /* A helper for dwarf_decode_macros that handles skipping an unknown
21179 opcode. Returns an updated pointer to the macro data buffer; or,
21180 on error, issues a complaint and returns NULL. */
21182 static const gdb_byte
*
21183 skip_unknown_opcode (unsigned int opcode
,
21184 const gdb_byte
**opcode_definitions
,
21185 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21187 unsigned int offset_size
,
21188 struct dwarf2_section_info
*section
)
21190 unsigned int bytes_read
, i
;
21192 const gdb_byte
*defn
;
21194 if (opcode_definitions
[opcode
] == NULL
)
21196 complaint (&symfile_complaints
,
21197 _("unrecognized DW_MACFINO opcode 0x%x"),
21202 defn
= opcode_definitions
[opcode
];
21203 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21204 defn
+= bytes_read
;
21206 for (i
= 0; i
< arg
; ++i
)
21208 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21209 (enum dwarf_form
) defn
[i
], offset_size
,
21211 if (mac_ptr
== NULL
)
21213 /* skip_form_bytes already issued the complaint. */
21221 /* A helper function which parses the header of a macro section.
21222 If the macro section is the extended (for now called "GNU") type,
21223 then this updates *OFFSET_SIZE. Returns a pointer to just after
21224 the header, or issues a complaint and returns NULL on error. */
21226 static const gdb_byte
*
21227 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21229 const gdb_byte
*mac_ptr
,
21230 unsigned int *offset_size
,
21231 int section_is_gnu
)
21233 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21235 if (section_is_gnu
)
21237 unsigned int version
, flags
;
21239 version
= read_2_bytes (abfd
, mac_ptr
);
21242 complaint (&symfile_complaints
,
21243 _("unrecognized version `%d' in .debug_macro section"),
21249 flags
= read_1_byte (abfd
, mac_ptr
);
21251 *offset_size
= (flags
& 1) ? 8 : 4;
21253 if ((flags
& 2) != 0)
21254 /* We don't need the line table offset. */
21255 mac_ptr
+= *offset_size
;
21257 /* Vendor opcode descriptions. */
21258 if ((flags
& 4) != 0)
21260 unsigned int i
, count
;
21262 count
= read_1_byte (abfd
, mac_ptr
);
21264 for (i
= 0; i
< count
; ++i
)
21266 unsigned int opcode
, bytes_read
;
21269 opcode
= read_1_byte (abfd
, mac_ptr
);
21271 opcode_definitions
[opcode
] = mac_ptr
;
21272 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21273 mac_ptr
+= bytes_read
;
21282 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21283 including DW_MACRO_GNU_transparent_include. */
21286 dwarf_decode_macro_bytes (bfd
*abfd
,
21287 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21288 struct macro_source_file
*current_file
,
21289 struct line_header
*lh
,
21290 struct dwarf2_section_info
*section
,
21291 int section_is_gnu
, int section_is_dwz
,
21292 unsigned int offset_size
,
21293 htab_t include_hash
)
21295 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21296 enum dwarf_macro_record_type macinfo_type
;
21297 int at_commandline
;
21298 const gdb_byte
*opcode_definitions
[256];
21300 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21301 &offset_size
, section_is_gnu
);
21302 if (mac_ptr
== NULL
)
21304 /* We already issued a complaint. */
21308 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21309 GDB is still reading the definitions from command line. First
21310 DW_MACINFO_start_file will need to be ignored as it was already executed
21311 to create CURRENT_FILE for the main source holding also the command line
21312 definitions. On first met DW_MACINFO_start_file this flag is reset to
21313 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21315 at_commandline
= 1;
21319 /* Do we at least have room for a macinfo type byte? */
21320 if (mac_ptr
>= mac_end
)
21322 dwarf2_section_buffer_overflow_complaint (section
);
21326 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21329 /* Note that we rely on the fact that the corresponding GNU and
21330 DWARF constants are the same. */
21331 switch (macinfo_type
)
21333 /* A zero macinfo type indicates the end of the macro
21338 case DW_MACRO_GNU_define
:
21339 case DW_MACRO_GNU_undef
:
21340 case DW_MACRO_GNU_define_indirect
:
21341 case DW_MACRO_GNU_undef_indirect
:
21342 case DW_MACRO_GNU_define_indirect_alt
:
21343 case DW_MACRO_GNU_undef_indirect_alt
:
21345 unsigned int bytes_read
;
21350 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21351 mac_ptr
+= bytes_read
;
21353 if (macinfo_type
== DW_MACRO_GNU_define
21354 || macinfo_type
== DW_MACRO_GNU_undef
)
21356 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21357 mac_ptr
+= bytes_read
;
21361 LONGEST str_offset
;
21363 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21364 mac_ptr
+= offset_size
;
21366 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21367 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21370 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21372 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21375 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21378 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21379 || macinfo_type
== DW_MACRO_GNU_define_indirect
21380 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21381 if (! current_file
)
21383 /* DWARF violation as no main source is present. */
21384 complaint (&symfile_complaints
,
21385 _("debug info with no main source gives macro %s "
21387 is_define
? _("definition") : _("undefinition"),
21391 if ((line
== 0 && !at_commandline
)
21392 || (line
!= 0 && at_commandline
))
21393 complaint (&symfile_complaints
,
21394 _("debug info gives %s macro %s with %s line %d: %s"),
21395 at_commandline
? _("command-line") : _("in-file"),
21396 is_define
? _("definition") : _("undefinition"),
21397 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21400 parse_macro_definition (current_file
, line
, body
);
21403 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21404 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21405 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21406 macro_undef (current_file
, line
, body
);
21411 case DW_MACRO_GNU_start_file
:
21413 unsigned int bytes_read
;
21416 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21417 mac_ptr
+= bytes_read
;
21418 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21419 mac_ptr
+= bytes_read
;
21421 if ((line
== 0 && !at_commandline
)
21422 || (line
!= 0 && at_commandline
))
21423 complaint (&symfile_complaints
,
21424 _("debug info gives source %d included "
21425 "from %s at %s line %d"),
21426 file
, at_commandline
? _("command-line") : _("file"),
21427 line
== 0 ? _("zero") : _("non-zero"), line
);
21429 if (at_commandline
)
21431 /* This DW_MACRO_GNU_start_file was executed in the
21433 at_commandline
= 0;
21436 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21440 case DW_MACRO_GNU_end_file
:
21441 if (! current_file
)
21442 complaint (&symfile_complaints
,
21443 _("macro debug info has an unmatched "
21444 "`close_file' directive"));
21447 current_file
= current_file
->included_by
;
21448 if (! current_file
)
21450 enum dwarf_macro_record_type next_type
;
21452 /* GCC circa March 2002 doesn't produce the zero
21453 type byte marking the end of the compilation
21454 unit. Complain if it's not there, but exit no
21457 /* Do we at least have room for a macinfo type byte? */
21458 if (mac_ptr
>= mac_end
)
21460 dwarf2_section_buffer_overflow_complaint (section
);
21464 /* We don't increment mac_ptr here, so this is just
21467 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21469 if (next_type
!= 0)
21470 complaint (&symfile_complaints
,
21471 _("no terminating 0-type entry for "
21472 "macros in `.debug_macinfo' section"));
21479 case DW_MACRO_GNU_transparent_include
:
21480 case DW_MACRO_GNU_transparent_include_alt
:
21484 bfd
*include_bfd
= abfd
;
21485 struct dwarf2_section_info
*include_section
= section
;
21486 const gdb_byte
*include_mac_end
= mac_end
;
21487 int is_dwz
= section_is_dwz
;
21488 const gdb_byte
*new_mac_ptr
;
21490 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21491 mac_ptr
+= offset_size
;
21493 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21495 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21497 dwarf2_read_section (objfile
, &dwz
->macro
);
21499 include_section
= &dwz
->macro
;
21500 include_bfd
= get_section_bfd_owner (include_section
);
21501 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21505 new_mac_ptr
= include_section
->buffer
+ offset
;
21506 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21510 /* This has actually happened; see
21511 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21512 complaint (&symfile_complaints
,
21513 _("recursive DW_MACRO_GNU_transparent_include in "
21514 ".debug_macro section"));
21518 *slot
= (void *) new_mac_ptr
;
21520 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21521 include_mac_end
, current_file
, lh
,
21522 section
, section_is_gnu
, is_dwz
,
21523 offset_size
, include_hash
);
21525 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21530 case DW_MACINFO_vendor_ext
:
21531 if (!section_is_gnu
)
21533 unsigned int bytes_read
;
21536 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21537 mac_ptr
+= bytes_read
;
21538 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21539 mac_ptr
+= bytes_read
;
21541 /* We don't recognize any vendor extensions. */
21547 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21548 mac_ptr
, mac_end
, abfd
, offset_size
,
21550 if (mac_ptr
== NULL
)
21554 } while (macinfo_type
!= 0);
21558 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21559 int section_is_gnu
)
21561 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21562 struct line_header
*lh
= cu
->line_header
;
21564 const gdb_byte
*mac_ptr
, *mac_end
;
21565 struct macro_source_file
*current_file
= 0;
21566 enum dwarf_macro_record_type macinfo_type
;
21567 unsigned int offset_size
= cu
->header
.offset_size
;
21568 const gdb_byte
*opcode_definitions
[256];
21569 struct cleanup
*cleanup
;
21570 htab_t include_hash
;
21572 struct dwarf2_section_info
*section
;
21573 const char *section_name
;
21575 if (cu
->dwo_unit
!= NULL
)
21577 if (section_is_gnu
)
21579 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21580 section_name
= ".debug_macro.dwo";
21584 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21585 section_name
= ".debug_macinfo.dwo";
21590 if (section_is_gnu
)
21592 section
= &dwarf2_per_objfile
->macro
;
21593 section_name
= ".debug_macro";
21597 section
= &dwarf2_per_objfile
->macinfo
;
21598 section_name
= ".debug_macinfo";
21602 dwarf2_read_section (objfile
, section
);
21603 if (section
->buffer
== NULL
)
21605 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21608 abfd
= get_section_bfd_owner (section
);
21610 /* First pass: Find the name of the base filename.
21611 This filename is needed in order to process all macros whose definition
21612 (or undefinition) comes from the command line. These macros are defined
21613 before the first DW_MACINFO_start_file entry, and yet still need to be
21614 associated to the base file.
21616 To determine the base file name, we scan the macro definitions until we
21617 reach the first DW_MACINFO_start_file entry. We then initialize
21618 CURRENT_FILE accordingly so that any macro definition found before the
21619 first DW_MACINFO_start_file can still be associated to the base file. */
21621 mac_ptr
= section
->buffer
+ offset
;
21622 mac_end
= section
->buffer
+ section
->size
;
21624 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21625 &offset_size
, section_is_gnu
);
21626 if (mac_ptr
== NULL
)
21628 /* We already issued a complaint. */
21634 /* Do we at least have room for a macinfo type byte? */
21635 if (mac_ptr
>= mac_end
)
21637 /* Complaint is printed during the second pass as GDB will probably
21638 stop the first pass earlier upon finding
21639 DW_MACINFO_start_file. */
21643 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21646 /* Note that we rely on the fact that the corresponding GNU and
21647 DWARF constants are the same. */
21648 switch (macinfo_type
)
21650 /* A zero macinfo type indicates the end of the macro
21655 case DW_MACRO_GNU_define
:
21656 case DW_MACRO_GNU_undef
:
21657 /* Only skip the data by MAC_PTR. */
21659 unsigned int bytes_read
;
21661 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21662 mac_ptr
+= bytes_read
;
21663 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21664 mac_ptr
+= bytes_read
;
21668 case DW_MACRO_GNU_start_file
:
21670 unsigned int bytes_read
;
21673 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21674 mac_ptr
+= bytes_read
;
21675 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21676 mac_ptr
+= bytes_read
;
21678 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21682 case DW_MACRO_GNU_end_file
:
21683 /* No data to skip by MAC_PTR. */
21686 case DW_MACRO_GNU_define_indirect
:
21687 case DW_MACRO_GNU_undef_indirect
:
21688 case DW_MACRO_GNU_define_indirect_alt
:
21689 case DW_MACRO_GNU_undef_indirect_alt
:
21691 unsigned int bytes_read
;
21693 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21694 mac_ptr
+= bytes_read
;
21695 mac_ptr
+= offset_size
;
21699 case DW_MACRO_GNU_transparent_include
:
21700 case DW_MACRO_GNU_transparent_include_alt
:
21701 /* Note that, according to the spec, a transparent include
21702 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21703 skip this opcode. */
21704 mac_ptr
+= offset_size
;
21707 case DW_MACINFO_vendor_ext
:
21708 /* Only skip the data by MAC_PTR. */
21709 if (!section_is_gnu
)
21711 unsigned int bytes_read
;
21713 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21714 mac_ptr
+= bytes_read
;
21715 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21716 mac_ptr
+= bytes_read
;
21721 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21722 mac_ptr
, mac_end
, abfd
, offset_size
,
21724 if (mac_ptr
== NULL
)
21728 } while (macinfo_type
!= 0 && current_file
== NULL
);
21730 /* Second pass: Process all entries.
21732 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21733 command-line macro definitions/undefinitions. This flag is unset when we
21734 reach the first DW_MACINFO_start_file entry. */
21736 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21737 NULL
, xcalloc
, xfree
);
21738 cleanup
= make_cleanup_htab_delete (include_hash
);
21739 mac_ptr
= section
->buffer
+ offset
;
21740 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21741 *slot
= (void *) mac_ptr
;
21742 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21743 current_file
, lh
, section
,
21744 section_is_gnu
, 0, offset_size
, include_hash
);
21745 do_cleanups (cleanup
);
21748 /* Check if the attribute's form is a DW_FORM_block*
21749 if so return true else false. */
21752 attr_form_is_block (const struct attribute
*attr
)
21754 return (attr
== NULL
? 0 :
21755 attr
->form
== DW_FORM_block1
21756 || attr
->form
== DW_FORM_block2
21757 || attr
->form
== DW_FORM_block4
21758 || attr
->form
== DW_FORM_block
21759 || attr
->form
== DW_FORM_exprloc
);
21762 /* Return non-zero if ATTR's value is a section offset --- classes
21763 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21764 You may use DW_UNSND (attr) to retrieve such offsets.
21766 Section 7.5.4, "Attribute Encodings", explains that no attribute
21767 may have a value that belongs to more than one of these classes; it
21768 would be ambiguous if we did, because we use the same forms for all
21772 attr_form_is_section_offset (const struct attribute
*attr
)
21774 return (attr
->form
== DW_FORM_data4
21775 || attr
->form
== DW_FORM_data8
21776 || attr
->form
== DW_FORM_sec_offset
);
21779 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21780 zero otherwise. When this function returns true, you can apply
21781 dwarf2_get_attr_constant_value to it.
21783 However, note that for some attributes you must check
21784 attr_form_is_section_offset before using this test. DW_FORM_data4
21785 and DW_FORM_data8 are members of both the constant class, and of
21786 the classes that contain offsets into other debug sections
21787 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21788 that, if an attribute's can be either a constant or one of the
21789 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21790 taken as section offsets, not constants. */
21793 attr_form_is_constant (const struct attribute
*attr
)
21795 switch (attr
->form
)
21797 case DW_FORM_sdata
:
21798 case DW_FORM_udata
:
21799 case DW_FORM_data1
:
21800 case DW_FORM_data2
:
21801 case DW_FORM_data4
:
21802 case DW_FORM_data8
:
21810 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21811 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21814 attr_form_is_ref (const struct attribute
*attr
)
21816 switch (attr
->form
)
21818 case DW_FORM_ref_addr
:
21823 case DW_FORM_ref_udata
:
21824 case DW_FORM_GNU_ref_alt
:
21831 /* Return the .debug_loc section to use for CU.
21832 For DWO files use .debug_loc.dwo. */
21834 static struct dwarf2_section_info
*
21835 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21838 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21839 return &dwarf2_per_objfile
->loc
;
21842 /* A helper function that fills in a dwarf2_loclist_baton. */
21845 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21846 struct dwarf2_loclist_baton
*baton
,
21847 const struct attribute
*attr
)
21849 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21851 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21853 baton
->per_cu
= cu
->per_cu
;
21854 gdb_assert (baton
->per_cu
);
21855 /* We don't know how long the location list is, but make sure we
21856 don't run off the edge of the section. */
21857 baton
->size
= section
->size
- DW_UNSND (attr
);
21858 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21859 baton
->base_address
= cu
->base_address
;
21860 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21864 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21865 struct dwarf2_cu
*cu
, int is_block
)
21867 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21868 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21870 if (attr_form_is_section_offset (attr
)
21871 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21872 the section. If so, fall through to the complaint in the
21874 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21876 struct dwarf2_loclist_baton
*baton
;
21878 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
21880 fill_in_loclist_baton (cu
, baton
, attr
);
21882 if (cu
->base_known
== 0)
21883 complaint (&symfile_complaints
,
21884 _("Location list used without "
21885 "specifying the CU base address."));
21887 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21888 ? dwarf2_loclist_block_index
21889 : dwarf2_loclist_index
);
21890 SYMBOL_LOCATION_BATON (sym
) = baton
;
21894 struct dwarf2_locexpr_baton
*baton
;
21896 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
21897 baton
->per_cu
= cu
->per_cu
;
21898 gdb_assert (baton
->per_cu
);
21900 if (attr_form_is_block (attr
))
21902 /* Note that we're just copying the block's data pointer
21903 here, not the actual data. We're still pointing into the
21904 info_buffer for SYM's objfile; right now we never release
21905 that buffer, but when we do clean up properly this may
21907 baton
->size
= DW_BLOCK (attr
)->size
;
21908 baton
->data
= DW_BLOCK (attr
)->data
;
21912 dwarf2_invalid_attrib_class_complaint ("location description",
21913 SYMBOL_NATURAL_NAME (sym
));
21917 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21918 ? dwarf2_locexpr_block_index
21919 : dwarf2_locexpr_index
);
21920 SYMBOL_LOCATION_BATON (sym
) = baton
;
21924 /* Return the OBJFILE associated with the compilation unit CU. If CU
21925 came from a separate debuginfo file, then the master objfile is
21929 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21931 struct objfile
*objfile
= per_cu
->objfile
;
21933 /* Return the master objfile, so that we can report and look up the
21934 correct file containing this variable. */
21935 if (objfile
->separate_debug_objfile_backlink
)
21936 objfile
= objfile
->separate_debug_objfile_backlink
;
21941 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21942 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21943 CU_HEADERP first. */
21945 static const struct comp_unit_head
*
21946 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21947 struct dwarf2_per_cu_data
*per_cu
)
21949 const gdb_byte
*info_ptr
;
21952 return &per_cu
->cu
->header
;
21954 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21956 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21957 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21962 /* Return the address size given in the compilation unit header for CU. */
21965 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21967 struct comp_unit_head cu_header_local
;
21968 const struct comp_unit_head
*cu_headerp
;
21970 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21972 return cu_headerp
->addr_size
;
21975 /* Return the offset size given in the compilation unit header for CU. */
21978 dwarf2_per_cu_offset_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
->offset_size
;
21988 /* See its dwarf2loc.h declaration. */
21991 dwarf2_per_cu_ref_addr_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 if (cu_headerp
->version
== 2)
21999 return cu_headerp
->addr_size
;
22001 return cu_headerp
->offset_size
;
22004 /* Return the text offset of the CU. The returned offset comes from
22005 this CU's objfile. If this objfile came from a separate debuginfo
22006 file, then the offset may be different from the corresponding
22007 offset in the parent objfile. */
22010 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22012 struct objfile
*objfile
= per_cu
->objfile
;
22014 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22017 /* Locate the .debug_info compilation unit from CU's objfile which contains
22018 the DIE at OFFSET. Raises an error on failure. */
22020 static struct dwarf2_per_cu_data
*
22021 dwarf2_find_containing_comp_unit (sect_offset offset
,
22022 unsigned int offset_in_dwz
,
22023 struct objfile
*objfile
)
22025 struct dwarf2_per_cu_data
*this_cu
;
22027 const sect_offset
*cu_off
;
22030 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22033 struct dwarf2_per_cu_data
*mid_cu
;
22034 int mid
= low
+ (high
- low
) / 2;
22036 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22037 cu_off
= &mid_cu
->offset
;
22038 if (mid_cu
->is_dwz
> offset_in_dwz
22039 || (mid_cu
->is_dwz
== offset_in_dwz
22040 && cu_off
->sect_off
>= offset
.sect_off
))
22045 gdb_assert (low
== high
);
22046 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22047 cu_off
= &this_cu
->offset
;
22048 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22050 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22051 error (_("Dwarf Error: could not find partial DIE containing "
22052 "offset 0x%lx [in module %s]"),
22053 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22055 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22056 <= offset
.sect_off
);
22057 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22061 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22062 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22063 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22064 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22065 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22070 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22073 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22075 memset (cu
, 0, sizeof (*cu
));
22077 cu
->per_cu
= per_cu
;
22078 cu
->objfile
= per_cu
->objfile
;
22079 obstack_init (&cu
->comp_unit_obstack
);
22082 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22085 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22086 enum language pretend_language
)
22088 struct attribute
*attr
;
22090 /* Set the language we're debugging. */
22091 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22093 set_cu_language (DW_UNSND (attr
), cu
);
22096 cu
->language
= pretend_language
;
22097 cu
->language_defn
= language_def (cu
->language
);
22100 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22103 /* Release one cached compilation unit, CU. We unlink it from the tree
22104 of compilation units, but we don't remove it from the read_in_chain;
22105 the caller is responsible for that.
22106 NOTE: DATA is a void * because this function is also used as a
22107 cleanup routine. */
22110 free_heap_comp_unit (void *data
)
22112 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22114 gdb_assert (cu
->per_cu
!= NULL
);
22115 cu
->per_cu
->cu
= NULL
;
22118 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22123 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22124 when we're finished with it. We can't free the pointer itself, but be
22125 sure to unlink it from the cache. Also release any associated storage. */
22128 free_stack_comp_unit (void *data
)
22130 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22132 gdb_assert (cu
->per_cu
!= NULL
);
22133 cu
->per_cu
->cu
= NULL
;
22136 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22137 cu
->partial_dies
= NULL
;
22140 /* Free all cached compilation units. */
22143 free_cached_comp_units (void *data
)
22145 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22147 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22148 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22149 while (per_cu
!= NULL
)
22151 struct dwarf2_per_cu_data
*next_cu
;
22153 next_cu
= per_cu
->cu
->read_in_chain
;
22155 free_heap_comp_unit (per_cu
->cu
);
22156 *last_chain
= next_cu
;
22162 /* Increase the age counter on each cached compilation unit, and free
22163 any that are too old. */
22166 age_cached_comp_units (void)
22168 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22170 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22171 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22172 while (per_cu
!= NULL
)
22174 per_cu
->cu
->last_used
++;
22175 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22176 dwarf2_mark (per_cu
->cu
);
22177 per_cu
= per_cu
->cu
->read_in_chain
;
22180 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22181 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22182 while (per_cu
!= NULL
)
22184 struct dwarf2_per_cu_data
*next_cu
;
22186 next_cu
= per_cu
->cu
->read_in_chain
;
22188 if (!per_cu
->cu
->mark
)
22190 free_heap_comp_unit (per_cu
->cu
);
22191 *last_chain
= next_cu
;
22194 last_chain
= &per_cu
->cu
->read_in_chain
;
22200 /* Remove a single compilation unit from the cache. */
22203 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22205 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22207 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22208 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22209 while (per_cu
!= NULL
)
22211 struct dwarf2_per_cu_data
*next_cu
;
22213 next_cu
= per_cu
->cu
->read_in_chain
;
22215 if (per_cu
== target_per_cu
)
22217 free_heap_comp_unit (per_cu
->cu
);
22219 *last_chain
= next_cu
;
22223 last_chain
= &per_cu
->cu
->read_in_chain
;
22229 /* Release all extra memory associated with OBJFILE. */
22232 dwarf2_free_objfile (struct objfile
*objfile
)
22235 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22236 dwarf2_objfile_data_key
);
22238 if (dwarf2_per_objfile
== NULL
)
22241 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22242 free_cached_comp_units (NULL
);
22244 if (dwarf2_per_objfile
->quick_file_names_table
)
22245 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22247 if (dwarf2_per_objfile
->line_header_hash
)
22248 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22250 /* Everything else should be on the objfile obstack. */
22253 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22254 We store these in a hash table separate from the DIEs, and preserve them
22255 when the DIEs are flushed out of cache.
22257 The CU "per_cu" pointer is needed because offset alone is not enough to
22258 uniquely identify the type. A file may have multiple .debug_types sections,
22259 or the type may come from a DWO file. Furthermore, while it's more logical
22260 to use per_cu->section+offset, with Fission the section with the data is in
22261 the DWO file but we don't know that section at the point we need it.
22262 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22263 because we can enter the lookup routine, get_die_type_at_offset, from
22264 outside this file, and thus won't necessarily have PER_CU->cu.
22265 Fortunately, PER_CU is stable for the life of the objfile. */
22267 struct dwarf2_per_cu_offset_and_type
22269 const struct dwarf2_per_cu_data
*per_cu
;
22270 sect_offset offset
;
22274 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22277 per_cu_offset_and_type_hash (const void *item
)
22279 const struct dwarf2_per_cu_offset_and_type
*ofs
22280 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22282 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22285 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22288 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22290 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22291 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22292 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22293 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22295 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22296 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22299 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22300 table if necessary. For convenience, return TYPE.
22302 The DIEs reading must have careful ordering to:
22303 * Not cause infite loops trying to read in DIEs as a prerequisite for
22304 reading current DIE.
22305 * Not trying to dereference contents of still incompletely read in types
22306 while reading in other DIEs.
22307 * Enable referencing still incompletely read in types just by a pointer to
22308 the type without accessing its fields.
22310 Therefore caller should follow these rules:
22311 * Try to fetch any prerequisite types we may need to build this DIE type
22312 before building the type and calling set_die_type.
22313 * After building type call set_die_type for current DIE as soon as
22314 possible before fetching more types to complete the current type.
22315 * Make the type as complete as possible before fetching more types. */
22317 static struct type
*
22318 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22320 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22321 struct objfile
*objfile
= cu
->objfile
;
22322 struct attribute
*attr
;
22323 struct dynamic_prop prop
;
22325 /* For Ada types, make sure that the gnat-specific data is always
22326 initialized (if not already set). There are a few types where
22327 we should not be doing so, because the type-specific area is
22328 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22329 where the type-specific area is used to store the floatformat).
22330 But this is not a problem, because the gnat-specific information
22331 is actually not needed for these types. */
22332 if (need_gnat_info (cu
)
22333 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22334 && TYPE_CODE (type
) != TYPE_CODE_FLT
22335 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22336 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22337 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22338 && !HAVE_GNAT_AUX_INFO (type
))
22339 INIT_GNAT_SPECIFIC (type
);
22341 /* Read DW_AT_allocated and set in type. */
22342 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
22343 if (attr_form_is_block (attr
))
22345 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22346 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
22348 else if (attr
!= NULL
)
22350 complaint (&symfile_complaints
,
22351 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
22352 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22353 die
->offset
.sect_off
);
22356 /* Read DW_AT_associated and set in type. */
22357 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
22358 if (attr_form_is_block (attr
))
22360 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22361 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
22363 else if (attr
!= NULL
)
22365 complaint (&symfile_complaints
,
22366 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
22367 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22368 die
->offset
.sect_off
);
22371 /* Read DW_AT_data_location and set in type. */
22372 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22373 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22374 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22376 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22378 dwarf2_per_objfile
->die_type_hash
=
22379 htab_create_alloc_ex (127,
22380 per_cu_offset_and_type_hash
,
22381 per_cu_offset_and_type_eq
,
22383 &objfile
->objfile_obstack
,
22384 hashtab_obstack_allocate
,
22385 dummy_obstack_deallocate
);
22388 ofs
.per_cu
= cu
->per_cu
;
22389 ofs
.offset
= die
->offset
;
22391 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22392 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22394 complaint (&symfile_complaints
,
22395 _("A problem internal to GDB: DIE 0x%x has type already set"),
22396 die
->offset
.sect_off
);
22397 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22398 struct dwarf2_per_cu_offset_and_type
);
22403 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22404 or return NULL if the die does not have a saved type. */
22406 static struct type
*
22407 get_die_type_at_offset (sect_offset offset
,
22408 struct dwarf2_per_cu_data
*per_cu
)
22410 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22412 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22415 ofs
.per_cu
= per_cu
;
22416 ofs
.offset
= offset
;
22417 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
22418 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
22425 /* Look up the type for DIE in CU in die_type_hash,
22426 or return NULL if DIE does not have a saved type. */
22428 static struct type
*
22429 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22431 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22434 /* Add a dependence relationship from CU to REF_PER_CU. */
22437 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22438 struct dwarf2_per_cu_data
*ref_per_cu
)
22442 if (cu
->dependencies
== NULL
)
22444 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22445 NULL
, &cu
->comp_unit_obstack
,
22446 hashtab_obstack_allocate
,
22447 dummy_obstack_deallocate
);
22449 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22451 *slot
= ref_per_cu
;
22454 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22455 Set the mark field in every compilation unit in the
22456 cache that we must keep because we are keeping CU. */
22459 dwarf2_mark_helper (void **slot
, void *data
)
22461 struct dwarf2_per_cu_data
*per_cu
;
22463 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22465 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22466 reading of the chain. As such dependencies remain valid it is not much
22467 useful to track and undo them during QUIT cleanups. */
22468 if (per_cu
->cu
== NULL
)
22471 if (per_cu
->cu
->mark
)
22473 per_cu
->cu
->mark
= 1;
22475 if (per_cu
->cu
->dependencies
!= NULL
)
22476 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22481 /* Set the mark field in CU and in every other compilation unit in the
22482 cache that we must keep because we are keeping CU. */
22485 dwarf2_mark (struct dwarf2_cu
*cu
)
22490 if (cu
->dependencies
!= NULL
)
22491 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22495 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22499 per_cu
->cu
->mark
= 0;
22500 per_cu
= per_cu
->cu
->read_in_chain
;
22504 /* Trivial hash function for partial_die_info: the hash value of a DIE
22505 is its offset in .debug_info for this objfile. */
22508 partial_die_hash (const void *item
)
22510 const struct partial_die_info
*part_die
22511 = (const struct partial_die_info
*) item
;
22513 return part_die
->offset
.sect_off
;
22516 /* Trivial comparison function for partial_die_info structures: two DIEs
22517 are equal if they have the same offset. */
22520 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22522 const struct partial_die_info
*part_die_lhs
22523 = (const struct partial_die_info
*) item_lhs
;
22524 const struct partial_die_info
*part_die_rhs
22525 = (const struct partial_die_info
*) item_rhs
;
22527 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22530 static struct cmd_list_element
*set_dwarf_cmdlist
;
22531 static struct cmd_list_element
*show_dwarf_cmdlist
;
22534 set_dwarf_cmd (char *args
, int from_tty
)
22536 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22541 show_dwarf_cmd (char *args
, int from_tty
)
22543 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22546 /* Free data associated with OBJFILE, if necessary. */
22549 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22551 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
22554 /* Make sure we don't accidentally use dwarf2_per_objfile while
22556 dwarf2_per_objfile
= NULL
;
22558 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22559 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22561 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22562 VEC_free (dwarf2_per_cu_ptr
,
22563 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22564 xfree (data
->all_type_units
);
22566 VEC_free (dwarf2_section_info_def
, data
->types
);
22568 if (data
->dwo_files
)
22569 free_dwo_files (data
->dwo_files
, objfile
);
22570 if (data
->dwp_file
)
22571 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22573 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22574 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22578 /* The "save gdb-index" command. */
22580 /* The contents of the hash table we create when building the string
22582 struct strtab_entry
22584 offset_type offset
;
22588 /* Hash function for a strtab_entry.
22590 Function is used only during write_hash_table so no index format backward
22591 compatibility is needed. */
22594 hash_strtab_entry (const void *e
)
22596 const struct strtab_entry
*entry
= (const struct strtab_entry
*) e
;
22597 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22600 /* Equality function for a strtab_entry. */
22603 eq_strtab_entry (const void *a
, const void *b
)
22605 const struct strtab_entry
*ea
= (const struct strtab_entry
*) a
;
22606 const struct strtab_entry
*eb
= (const struct strtab_entry
*) b
;
22607 return !strcmp (ea
->str
, eb
->str
);
22610 /* Create a strtab_entry hash table. */
22613 create_strtab (void)
22615 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22616 xfree
, xcalloc
, xfree
);
22619 /* Add a string to the constant pool. Return the string's offset in
22623 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22626 struct strtab_entry entry
;
22627 struct strtab_entry
*result
;
22630 slot
= htab_find_slot (table
, &entry
, INSERT
);
22632 result
= (struct strtab_entry
*) *slot
;
22635 result
= XNEW (struct strtab_entry
);
22636 result
->offset
= obstack_object_size (cpool
);
22638 obstack_grow_str0 (cpool
, str
);
22641 return result
->offset
;
22644 /* An entry in the symbol table. */
22645 struct symtab_index_entry
22647 /* The name of the symbol. */
22649 /* The offset of the name in the constant pool. */
22650 offset_type index_offset
;
22651 /* A sorted vector of the indices of all the CUs that hold an object
22653 VEC (offset_type
) *cu_indices
;
22656 /* The symbol table. This is a power-of-2-sized hash table. */
22657 struct mapped_symtab
22659 offset_type n_elements
;
22661 struct symtab_index_entry
**data
;
22664 /* Hash function for a symtab_index_entry. */
22667 hash_symtab_entry (const void *e
)
22669 const struct symtab_index_entry
*entry
22670 = (const struct symtab_index_entry
*) e
;
22671 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22672 sizeof (offset_type
) * VEC_length (offset_type
,
22673 entry
->cu_indices
),
22677 /* Equality function for a symtab_index_entry. */
22680 eq_symtab_entry (const void *a
, const void *b
)
22682 const struct symtab_index_entry
*ea
= (const struct symtab_index_entry
*) a
;
22683 const struct symtab_index_entry
*eb
= (const struct symtab_index_entry
*) b
;
22684 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22685 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22687 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22688 VEC_address (offset_type
, eb
->cu_indices
),
22689 sizeof (offset_type
) * len
);
22692 /* Destroy a symtab_index_entry. */
22695 delete_symtab_entry (void *p
)
22697 struct symtab_index_entry
*entry
= (struct symtab_index_entry
*) p
;
22698 VEC_free (offset_type
, entry
->cu_indices
);
22702 /* Create a hash table holding symtab_index_entry objects. */
22705 create_symbol_hash_table (void)
22707 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22708 delete_symtab_entry
, xcalloc
, xfree
);
22711 /* Create a new mapped symtab object. */
22713 static struct mapped_symtab
*
22714 create_mapped_symtab (void)
22716 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22717 symtab
->n_elements
= 0;
22718 symtab
->size
= 1024;
22719 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22723 /* Destroy a mapped_symtab. */
22726 cleanup_mapped_symtab (void *p
)
22728 struct mapped_symtab
*symtab
= (struct mapped_symtab
*) p
;
22729 /* The contents of the array are freed when the other hash table is
22731 xfree (symtab
->data
);
22735 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22738 Function is used only during write_hash_table so no index format backward
22739 compatibility is needed. */
22741 static struct symtab_index_entry
**
22742 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22744 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22746 index
= hash
& (symtab
->size
- 1);
22747 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22751 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22752 return &symtab
->data
[index
];
22753 index
= (index
+ step
) & (symtab
->size
- 1);
22757 /* Expand SYMTAB's hash table. */
22760 hash_expand (struct mapped_symtab
*symtab
)
22762 offset_type old_size
= symtab
->size
;
22764 struct symtab_index_entry
**old_entries
= symtab
->data
;
22767 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22769 for (i
= 0; i
< old_size
; ++i
)
22771 if (old_entries
[i
])
22773 struct symtab_index_entry
**slot
= find_slot (symtab
,
22774 old_entries
[i
]->name
);
22775 *slot
= old_entries
[i
];
22779 xfree (old_entries
);
22782 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22783 CU_INDEX is the index of the CU in which the symbol appears.
22784 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22787 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22788 int is_static
, gdb_index_symbol_kind kind
,
22789 offset_type cu_index
)
22791 struct symtab_index_entry
**slot
;
22792 offset_type cu_index_and_attrs
;
22794 ++symtab
->n_elements
;
22795 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22796 hash_expand (symtab
);
22798 slot
= find_slot (symtab
, name
);
22801 *slot
= XNEW (struct symtab_index_entry
);
22802 (*slot
)->name
= name
;
22803 /* index_offset is set later. */
22804 (*slot
)->cu_indices
= NULL
;
22807 cu_index_and_attrs
= 0;
22808 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22809 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22810 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22812 /* We don't want to record an index value twice as we want to avoid the
22814 We process all global symbols and then all static symbols
22815 (which would allow us to avoid the duplication by only having to check
22816 the last entry pushed), but a symbol could have multiple kinds in one CU.
22817 To keep things simple we don't worry about the duplication here and
22818 sort and uniqufy the list after we've processed all symbols. */
22819 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22822 /* qsort helper routine for uniquify_cu_indices. */
22825 offset_type_compare (const void *ap
, const void *bp
)
22827 offset_type a
= *(offset_type
*) ap
;
22828 offset_type b
= *(offset_type
*) bp
;
22830 return (a
> b
) - (b
> a
);
22833 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22836 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22840 for (i
= 0; i
< symtab
->size
; ++i
)
22842 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22845 && entry
->cu_indices
!= NULL
)
22847 unsigned int next_to_insert
, next_to_check
;
22848 offset_type last_value
;
22850 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22851 VEC_length (offset_type
, entry
->cu_indices
),
22852 sizeof (offset_type
), offset_type_compare
);
22854 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22855 next_to_insert
= 1;
22856 for (next_to_check
= 1;
22857 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22860 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22863 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22865 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22870 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22875 /* Add a vector of indices to the constant pool. */
22878 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22879 struct symtab_index_entry
*entry
)
22883 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22886 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22887 offset_type val
= MAYBE_SWAP (len
);
22892 entry
->index_offset
= obstack_object_size (cpool
);
22894 obstack_grow (cpool
, &val
, sizeof (val
));
22896 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22899 val
= MAYBE_SWAP (iter
);
22900 obstack_grow (cpool
, &val
, sizeof (val
));
22905 struct symtab_index_entry
*old_entry
22906 = (struct symtab_index_entry
*) *slot
;
22907 entry
->index_offset
= old_entry
->index_offset
;
22910 return entry
->index_offset
;
22913 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22914 constant pool entries going into the obstack CPOOL. */
22917 write_hash_table (struct mapped_symtab
*symtab
,
22918 struct obstack
*output
, struct obstack
*cpool
)
22921 htab_t symbol_hash_table
;
22924 symbol_hash_table
= create_symbol_hash_table ();
22925 str_table
= create_strtab ();
22927 /* We add all the index vectors to the constant pool first, to
22928 ensure alignment is ok. */
22929 for (i
= 0; i
< symtab
->size
; ++i
)
22931 if (symtab
->data
[i
])
22932 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22935 /* Now write out the hash table. */
22936 for (i
= 0; i
< symtab
->size
; ++i
)
22938 offset_type str_off
, vec_off
;
22940 if (symtab
->data
[i
])
22942 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22943 vec_off
= symtab
->data
[i
]->index_offset
;
22947 /* While 0 is a valid constant pool index, it is not valid
22948 to have 0 for both offsets. */
22953 str_off
= MAYBE_SWAP (str_off
);
22954 vec_off
= MAYBE_SWAP (vec_off
);
22956 obstack_grow (output
, &str_off
, sizeof (str_off
));
22957 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22960 htab_delete (str_table
);
22961 htab_delete (symbol_hash_table
);
22964 /* Struct to map psymtab to CU index in the index file. */
22965 struct psymtab_cu_index_map
22967 struct partial_symtab
*psymtab
;
22968 unsigned int cu_index
;
22972 hash_psymtab_cu_index (const void *item
)
22974 const struct psymtab_cu_index_map
*map
22975 = (const struct psymtab_cu_index_map
*) item
;
22977 return htab_hash_pointer (map
->psymtab
);
22981 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22983 const struct psymtab_cu_index_map
*lhs
22984 = (const struct psymtab_cu_index_map
*) item_lhs
;
22985 const struct psymtab_cu_index_map
*rhs
22986 = (const struct psymtab_cu_index_map
*) item_rhs
;
22988 return lhs
->psymtab
== rhs
->psymtab
;
22991 /* Helper struct for building the address table. */
22992 struct addrmap_index_data
22994 struct objfile
*objfile
;
22995 struct obstack
*addr_obstack
;
22996 htab_t cu_index_htab
;
22998 /* Non-zero if the previous_* fields are valid.
22999 We can't write an entry until we see the next entry (since it is only then
23000 that we know the end of the entry). */
23001 int previous_valid
;
23002 /* Index of the CU in the table of all CUs in the index file. */
23003 unsigned int previous_cu_index
;
23004 /* Start address of the CU. */
23005 CORE_ADDR previous_cu_start
;
23008 /* Write an address entry to OBSTACK. */
23011 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
23012 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23014 offset_type cu_index_to_write
;
23016 CORE_ADDR baseaddr
;
23018 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23020 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23021 obstack_grow (obstack
, addr
, 8);
23022 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23023 obstack_grow (obstack
, addr
, 8);
23024 cu_index_to_write
= MAYBE_SWAP (cu_index
);
23025 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
23028 /* Worker function for traversing an addrmap to build the address table. */
23031 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23033 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23034 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23036 if (data
->previous_valid
)
23037 add_address_entry (data
->objfile
, data
->addr_obstack
,
23038 data
->previous_cu_start
, start_addr
,
23039 data
->previous_cu_index
);
23041 data
->previous_cu_start
= start_addr
;
23044 struct psymtab_cu_index_map find_map
, *map
;
23045 find_map
.psymtab
= pst
;
23046 map
= ((struct psymtab_cu_index_map
*)
23047 htab_find (data
->cu_index_htab
, &find_map
));
23048 gdb_assert (map
!= NULL
);
23049 data
->previous_cu_index
= map
->cu_index
;
23050 data
->previous_valid
= 1;
23053 data
->previous_valid
= 0;
23058 /* Write OBJFILE's address map to OBSTACK.
23059 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23060 in the index file. */
23063 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23064 htab_t cu_index_htab
)
23066 struct addrmap_index_data addrmap_index_data
;
23068 /* When writing the address table, we have to cope with the fact that
23069 the addrmap iterator only provides the start of a region; we have to
23070 wait until the next invocation to get the start of the next region. */
23072 addrmap_index_data
.objfile
= objfile
;
23073 addrmap_index_data
.addr_obstack
= obstack
;
23074 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23075 addrmap_index_data
.previous_valid
= 0;
23077 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23078 &addrmap_index_data
);
23080 /* It's highly unlikely the last entry (end address = 0xff...ff)
23081 is valid, but we should still handle it.
23082 The end address is recorded as the start of the next region, but that
23083 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23085 if (addrmap_index_data
.previous_valid
)
23086 add_address_entry (objfile
, obstack
,
23087 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23088 addrmap_index_data
.previous_cu_index
);
23091 /* Return the symbol kind of PSYM. */
23093 static gdb_index_symbol_kind
23094 symbol_kind (struct partial_symbol
*psym
)
23096 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23097 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23105 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23107 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23109 case LOC_CONST_BYTES
:
23110 case LOC_OPTIMIZED_OUT
:
23112 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23114 /* Note: It's currently impossible to recognize psyms as enum values
23115 short of reading the type info. For now punt. */
23116 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23118 /* There are other LOC_FOO values that one might want to classify
23119 as variables, but dwarf2read.c doesn't currently use them. */
23120 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23122 case STRUCT_DOMAIN
:
23123 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23125 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23129 /* Add a list of partial symbols to SYMTAB. */
23132 write_psymbols (struct mapped_symtab
*symtab
,
23134 struct partial_symbol
**psymp
,
23136 offset_type cu_index
,
23139 for (; count
-- > 0; ++psymp
)
23141 struct partial_symbol
*psym
= *psymp
;
23144 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23145 error (_("Ada is not currently supported by the index"));
23147 /* Only add a given psymbol once. */
23148 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23151 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23154 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23155 is_static
, kind
, cu_index
);
23160 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23161 exception if there is an error. */
23164 write_obstack (FILE *file
, struct obstack
*obstack
)
23166 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23168 != obstack_object_size (obstack
))
23169 error (_("couldn't data write to file"));
23172 /* Unlink a file if the argument is not NULL. */
23175 unlink_if_set (void *p
)
23177 char **filename
= (char **) p
;
23179 unlink (*filename
);
23182 /* A helper struct used when iterating over debug_types. */
23183 struct signatured_type_index_data
23185 struct objfile
*objfile
;
23186 struct mapped_symtab
*symtab
;
23187 struct obstack
*types_list
;
23192 /* A helper function that writes a single signatured_type to an
23196 write_one_signatured_type (void **slot
, void *d
)
23198 struct signatured_type_index_data
*info
23199 = (struct signatured_type_index_data
*) d
;
23200 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23201 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23204 write_psymbols (info
->symtab
,
23206 info
->objfile
->global_psymbols
.list
23207 + psymtab
->globals_offset
,
23208 psymtab
->n_global_syms
, info
->cu_index
,
23210 write_psymbols (info
->symtab
,
23212 info
->objfile
->static_psymbols
.list
23213 + psymtab
->statics_offset
,
23214 psymtab
->n_static_syms
, info
->cu_index
,
23217 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23218 entry
->per_cu
.offset
.sect_off
);
23219 obstack_grow (info
->types_list
, val
, 8);
23220 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23221 entry
->type_offset_in_tu
.cu_off
);
23222 obstack_grow (info
->types_list
, val
, 8);
23223 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23224 obstack_grow (info
->types_list
, val
, 8);
23231 /* Recurse into all "included" dependencies and write their symbols as
23232 if they appeared in this psymtab. */
23235 recursively_write_psymbols (struct objfile
*objfile
,
23236 struct partial_symtab
*psymtab
,
23237 struct mapped_symtab
*symtab
,
23239 offset_type cu_index
)
23243 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23244 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23245 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23246 symtab
, psyms_seen
, cu_index
);
23248 write_psymbols (symtab
,
23250 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23251 psymtab
->n_global_syms
, cu_index
,
23253 write_psymbols (symtab
,
23255 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23256 psymtab
->n_static_syms
, cu_index
,
23260 /* Create an index file for OBJFILE in the directory DIR. */
23263 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23265 struct cleanup
*cleanup
;
23266 char *filename
, *cleanup_filename
;
23267 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23268 struct obstack cu_list
, types_cu_list
;
23271 struct mapped_symtab
*symtab
;
23272 offset_type val
, size_of_contents
, total_len
;
23275 htab_t cu_index_htab
;
23276 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23278 if (dwarf2_per_objfile
->using_index
)
23279 error (_("Cannot use an index to create the index"));
23281 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23282 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23284 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23287 if (stat (objfile_name (objfile
), &st
) < 0)
23288 perror_with_name (objfile_name (objfile
));
23290 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23291 INDEX_SUFFIX
, (char *) NULL
);
23292 cleanup
= make_cleanup (xfree
, filename
);
23294 out_file
= gdb_fopen_cloexec (filename
, "wb");
23296 error (_("Can't open `%s' for writing"), filename
);
23298 cleanup_filename
= filename
;
23299 make_cleanup (unlink_if_set
, &cleanup_filename
);
23301 symtab
= create_mapped_symtab ();
23302 make_cleanup (cleanup_mapped_symtab
, symtab
);
23304 obstack_init (&addr_obstack
);
23305 make_cleanup_obstack_free (&addr_obstack
);
23307 obstack_init (&cu_list
);
23308 make_cleanup_obstack_free (&cu_list
);
23310 obstack_init (&types_cu_list
);
23311 make_cleanup_obstack_free (&types_cu_list
);
23313 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23314 NULL
, xcalloc
, xfree
);
23315 make_cleanup_htab_delete (psyms_seen
);
23317 /* While we're scanning CU's create a table that maps a psymtab pointer
23318 (which is what addrmap records) to its index (which is what is recorded
23319 in the index file). This will later be needed to write the address
23321 cu_index_htab
= htab_create_alloc (100,
23322 hash_psymtab_cu_index
,
23323 eq_psymtab_cu_index
,
23324 NULL
, xcalloc
, xfree
);
23325 make_cleanup_htab_delete (cu_index_htab
);
23326 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23327 dwarf2_per_objfile
->n_comp_units
);
23328 make_cleanup (xfree
, psymtab_cu_index_map
);
23330 /* The CU list is already sorted, so we don't need to do additional
23331 work here. Also, the debug_types entries do not appear in
23332 all_comp_units, but only in their own hash table. */
23333 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23335 struct dwarf2_per_cu_data
*per_cu
23336 = dwarf2_per_objfile
->all_comp_units
[i
];
23337 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23339 struct psymtab_cu_index_map
*map
;
23342 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23343 It may be referenced from a local scope but in such case it does not
23344 need to be present in .gdb_index. */
23345 if (psymtab
== NULL
)
23348 if (psymtab
->user
== NULL
)
23349 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23351 map
= &psymtab_cu_index_map
[i
];
23352 map
->psymtab
= psymtab
;
23354 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23355 gdb_assert (slot
!= NULL
);
23356 gdb_assert (*slot
== NULL
);
23359 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23360 per_cu
->offset
.sect_off
);
23361 obstack_grow (&cu_list
, val
, 8);
23362 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23363 obstack_grow (&cu_list
, val
, 8);
23366 /* Dump the address map. */
23367 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23369 /* Write out the .debug_type entries, if any. */
23370 if (dwarf2_per_objfile
->signatured_types
)
23372 struct signatured_type_index_data sig_data
;
23374 sig_data
.objfile
= objfile
;
23375 sig_data
.symtab
= symtab
;
23376 sig_data
.types_list
= &types_cu_list
;
23377 sig_data
.psyms_seen
= psyms_seen
;
23378 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23379 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23380 write_one_signatured_type
, &sig_data
);
23383 /* Now that we've processed all symbols we can shrink their cu_indices
23385 uniquify_cu_indices (symtab
);
23387 obstack_init (&constant_pool
);
23388 make_cleanup_obstack_free (&constant_pool
);
23389 obstack_init (&symtab_obstack
);
23390 make_cleanup_obstack_free (&symtab_obstack
);
23391 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23393 obstack_init (&contents
);
23394 make_cleanup_obstack_free (&contents
);
23395 size_of_contents
= 6 * sizeof (offset_type
);
23396 total_len
= size_of_contents
;
23398 /* The version number. */
23399 val
= MAYBE_SWAP (8);
23400 obstack_grow (&contents
, &val
, sizeof (val
));
23402 /* The offset of the CU list from the start of the file. */
23403 val
= MAYBE_SWAP (total_len
);
23404 obstack_grow (&contents
, &val
, sizeof (val
));
23405 total_len
+= obstack_object_size (&cu_list
);
23407 /* The offset of the types CU list from the start of the file. */
23408 val
= MAYBE_SWAP (total_len
);
23409 obstack_grow (&contents
, &val
, sizeof (val
));
23410 total_len
+= obstack_object_size (&types_cu_list
);
23412 /* The offset of the address table from the start of the file. */
23413 val
= MAYBE_SWAP (total_len
);
23414 obstack_grow (&contents
, &val
, sizeof (val
));
23415 total_len
+= obstack_object_size (&addr_obstack
);
23417 /* The offset of the symbol table from the start of the file. */
23418 val
= MAYBE_SWAP (total_len
);
23419 obstack_grow (&contents
, &val
, sizeof (val
));
23420 total_len
+= obstack_object_size (&symtab_obstack
);
23422 /* The offset of the constant pool from the start of the file. */
23423 val
= MAYBE_SWAP (total_len
);
23424 obstack_grow (&contents
, &val
, sizeof (val
));
23425 total_len
+= obstack_object_size (&constant_pool
);
23427 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23429 write_obstack (out_file
, &contents
);
23430 write_obstack (out_file
, &cu_list
);
23431 write_obstack (out_file
, &types_cu_list
);
23432 write_obstack (out_file
, &addr_obstack
);
23433 write_obstack (out_file
, &symtab_obstack
);
23434 write_obstack (out_file
, &constant_pool
);
23438 /* We want to keep the file, so we set cleanup_filename to NULL
23439 here. See unlink_if_set. */
23440 cleanup_filename
= NULL
;
23442 do_cleanups (cleanup
);
23445 /* Implementation of the `save gdb-index' command.
23447 Note that the file format used by this command is documented in the
23448 GDB manual. Any changes here must be documented there. */
23451 save_gdb_index_command (char *arg
, int from_tty
)
23453 struct objfile
*objfile
;
23456 error (_("usage: save gdb-index DIRECTORY"));
23458 ALL_OBJFILES (objfile
)
23462 /* If the objfile does not correspond to an actual file, skip it. */
23463 if (stat (objfile_name (objfile
), &st
) < 0)
23467 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23468 dwarf2_objfile_data_key
);
23469 if (dwarf2_per_objfile
)
23474 write_psymtabs_to_index (objfile
, arg
);
23476 CATCH (except
, RETURN_MASK_ERROR
)
23478 exception_fprintf (gdb_stderr
, except
,
23479 _("Error while writing index for `%s': "),
23480 objfile_name (objfile
));
23489 int dwarf_always_disassemble
;
23492 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23493 struct cmd_list_element
*c
, const char *value
)
23495 fprintf_filtered (file
,
23496 _("Whether to always disassemble "
23497 "DWARF expressions is %s.\n"),
23502 show_check_physname (struct ui_file
*file
, int from_tty
,
23503 struct cmd_list_element
*c
, const char *value
)
23505 fprintf_filtered (file
,
23506 _("Whether to check \"physname\" is %s.\n"),
23510 void _initialize_dwarf2_read (void);
23513 _initialize_dwarf2_read (void)
23515 struct cmd_list_element
*c
;
23517 dwarf2_objfile_data_key
23518 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23520 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23521 Set DWARF specific variables.\n\
23522 Configure DWARF variables such as the cache size"),
23523 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23524 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23526 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23527 Show DWARF specific variables\n\
23528 Show DWARF variables such as the cache size"),
23529 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23530 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23532 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23533 &dwarf_max_cache_age
, _("\
23534 Set the upper bound on the age of cached DWARF compilation units."), _("\
23535 Show the upper bound on the age of cached DWARF compilation units."), _("\
23536 A higher limit means that cached compilation units will be stored\n\
23537 in memory longer, and more total memory will be used. Zero disables\n\
23538 caching, which can slow down startup."),
23540 show_dwarf_max_cache_age
,
23541 &set_dwarf_cmdlist
,
23542 &show_dwarf_cmdlist
);
23544 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23545 &dwarf_always_disassemble
, _("\
23546 Set whether `info address' always disassembles DWARF expressions."), _("\
23547 Show whether `info address' always disassembles DWARF expressions."), _("\
23548 When enabled, DWARF expressions are always printed in an assembly-like\n\
23549 syntax. When disabled, expressions will be printed in a more\n\
23550 conversational style, when possible."),
23552 show_dwarf_always_disassemble
,
23553 &set_dwarf_cmdlist
,
23554 &show_dwarf_cmdlist
);
23556 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23557 Set debugging of the DWARF reader."), _("\
23558 Show debugging of the DWARF reader."), _("\
23559 When enabled (non-zero), debugging messages are printed during DWARF\n\
23560 reading and symtab expansion. A value of 1 (one) provides basic\n\
23561 information. A value greater than 1 provides more verbose information."),
23564 &setdebuglist
, &showdebuglist
);
23566 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23567 Set debugging of the DWARF DIE reader."), _("\
23568 Show debugging of the DWARF DIE reader."), _("\
23569 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23570 The value is the maximum depth to print."),
23573 &setdebuglist
, &showdebuglist
);
23575 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23576 Set debugging of the dwarf line reader."), _("\
23577 Show debugging of the dwarf line reader."), _("\
23578 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23579 A value of 1 (one) provides basic information.\n\
23580 A value greater than 1 provides more verbose information."),
23583 &setdebuglist
, &showdebuglist
);
23585 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23586 Set cross-checking of \"physname\" code against demangler."), _("\
23587 Show cross-checking of \"physname\" code against demangler."), _("\
23588 When enabled, GDB's internal \"physname\" code is checked against\n\
23590 NULL
, show_check_physname
,
23591 &setdebuglist
, &showdebuglist
);
23593 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23594 no_class
, &use_deprecated_index_sections
, _("\
23595 Set whether to use deprecated gdb_index sections."), _("\
23596 Show whether to use deprecated gdb_index sections."), _("\
23597 When enabled, deprecated .gdb_index sections are used anyway.\n\
23598 Normally they are ignored either because of a missing feature or\n\
23599 performance issue.\n\
23600 Warning: This option must be enabled before gdb reads the file."),
23603 &setlist
, &showlist
);
23605 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23607 Save a gdb-index file.\n\
23608 Usage: save gdb-index DIRECTORY"),
23610 set_cmd_completer (c
, filename_completer
);
23612 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23613 &dwarf2_locexpr_funcs
);
23614 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23615 &dwarf2_loclist_funcs
);
23617 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23618 &dwarf2_block_frame_base_locexpr_funcs
);
23619 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23620 &dwarf2_block_frame_base_loclist_funcs
);