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 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1610 values. Keep the items ordered with increasing constraints compliance. */
1613 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1614 PC_BOUNDS_NOT_PRESENT
,
1616 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1617 were present but they do not form a valid range of PC addresses. */
1620 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1623 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1627 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1628 CORE_ADDR
*, CORE_ADDR
*,
1630 struct partial_symtab
*);
1632 static void get_scope_pc_bounds (struct die_info
*,
1633 CORE_ADDR
*, CORE_ADDR
*,
1634 struct dwarf2_cu
*);
1636 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1637 CORE_ADDR
, struct dwarf2_cu
*);
1639 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1640 struct dwarf2_cu
*);
1642 static void dwarf2_attach_fields_to_type (struct field_info
*,
1643 struct type
*, struct dwarf2_cu
*);
1645 static void dwarf2_add_member_fn (struct field_info
*,
1646 struct die_info
*, struct type
*,
1647 struct dwarf2_cu
*);
1649 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1651 struct dwarf2_cu
*);
1653 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1655 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1657 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1659 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1661 static struct using_direct
**using_directives (enum language
);
1663 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1665 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1667 static struct type
*read_module_type (struct die_info
*die
,
1668 struct dwarf2_cu
*cu
);
1670 static const char *namespace_name (struct die_info
*die
,
1671 int *is_anonymous
, struct dwarf2_cu
*);
1673 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1675 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1677 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1678 struct dwarf2_cu
*);
1680 static struct die_info
*read_die_and_siblings_1
1681 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1684 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1685 const gdb_byte
*info_ptr
,
1686 const gdb_byte
**new_info_ptr
,
1687 struct die_info
*parent
);
1689 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1690 struct die_info
**, const gdb_byte
*,
1693 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1694 struct die_info
**, const gdb_byte
*,
1697 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1699 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1702 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1704 static const char *dwarf2_full_name (const char *name
,
1705 struct die_info
*die
,
1706 struct dwarf2_cu
*cu
);
1708 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1709 struct dwarf2_cu
*cu
);
1711 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1712 struct dwarf2_cu
**);
1714 static const char *dwarf_tag_name (unsigned int);
1716 static const char *dwarf_attr_name (unsigned int);
1718 static const char *dwarf_form_name (unsigned int);
1720 static char *dwarf_bool_name (unsigned int);
1722 static const char *dwarf_type_encoding_name (unsigned int);
1724 static struct die_info
*sibling_die (struct die_info
*);
1726 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1728 static void dump_die_for_error (struct die_info
*);
1730 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1733 /*static*/ void dump_die (struct die_info
*, int max_level
);
1735 static void store_in_ref_table (struct die_info
*,
1736 struct dwarf2_cu
*);
1738 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1740 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1742 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1743 const struct attribute
*,
1744 struct dwarf2_cu
**);
1746 static struct die_info
*follow_die_ref (struct die_info
*,
1747 const struct attribute
*,
1748 struct dwarf2_cu
**);
1750 static struct die_info
*follow_die_sig (struct die_info
*,
1751 const struct attribute
*,
1752 struct dwarf2_cu
**);
1754 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1755 struct dwarf2_cu
*);
1757 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1758 const struct attribute
*,
1759 struct dwarf2_cu
*);
1761 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1763 static void read_signatured_type (struct signatured_type
*);
1765 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1766 struct die_info
*die
, struct dwarf2_cu
*cu
,
1767 struct dynamic_prop
*prop
);
1769 /* memory allocation interface */
1771 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1773 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1775 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1777 static int attr_form_is_block (const struct attribute
*);
1779 static int attr_form_is_section_offset (const struct attribute
*);
1781 static int attr_form_is_constant (const struct attribute
*);
1783 static int attr_form_is_ref (const struct attribute
*);
1785 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1786 struct dwarf2_loclist_baton
*baton
,
1787 const struct attribute
*attr
);
1789 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1791 struct dwarf2_cu
*cu
,
1794 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1795 const gdb_byte
*info_ptr
,
1796 struct abbrev_info
*abbrev
);
1798 static void free_stack_comp_unit (void *);
1800 static hashval_t
partial_die_hash (const void *item
);
1802 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1804 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1805 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1807 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1808 struct dwarf2_per_cu_data
*per_cu
);
1810 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1811 struct die_info
*comp_unit_die
,
1812 enum language pretend_language
);
1814 static void free_heap_comp_unit (void *);
1816 static void free_cached_comp_units (void *);
1818 static void age_cached_comp_units (void);
1820 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1822 static struct type
*set_die_type (struct die_info
*, struct type
*,
1823 struct dwarf2_cu
*);
1825 static void create_all_comp_units (struct objfile
*);
1827 static int create_all_type_units (struct objfile
*);
1829 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1832 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1835 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1838 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1839 struct dwarf2_per_cu_data
*);
1841 static void dwarf2_mark (struct dwarf2_cu
*);
1843 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1845 static struct type
*get_die_type_at_offset (sect_offset
,
1846 struct dwarf2_per_cu_data
*);
1848 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1850 static void dwarf2_release_queue (void *dummy
);
1852 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1853 enum language pretend_language
);
1855 static void process_queue (void);
1857 static void find_file_and_directory (struct die_info
*die
,
1858 struct dwarf2_cu
*cu
,
1859 const char **name
, const char **comp_dir
);
1861 static char *file_full_name (int file
, struct line_header
*lh
,
1862 const char *comp_dir
);
1864 static const gdb_byte
*read_and_check_comp_unit_head
1865 (struct comp_unit_head
*header
,
1866 struct dwarf2_section_info
*section
,
1867 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1868 int is_debug_types_section
);
1870 static void init_cutu_and_read_dies
1871 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1872 int use_existing_cu
, int keep
,
1873 die_reader_func_ftype
*die_reader_func
, void *data
);
1875 static void init_cutu_and_read_dies_simple
1876 (struct dwarf2_per_cu_data
*this_cu
,
1877 die_reader_func_ftype
*die_reader_func
, void *data
);
1879 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1881 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1883 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1884 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1885 ULONGEST signature
, int is_debug_types
);
1887 static struct dwp_file
*get_dwp_file (void);
1889 static struct dwo_unit
*lookup_dwo_comp_unit
1890 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1892 static struct dwo_unit
*lookup_dwo_type_unit
1893 (struct signatured_type
*, const char *, const char *);
1895 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1897 static void free_dwo_file_cleanup (void *);
1899 static void process_cu_includes (void);
1901 static void check_producer (struct dwarf2_cu
*cu
);
1903 static void free_line_header_voidp (void *arg
);
1905 /* Various complaints about symbol reading that don't abort the process. */
1908 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1910 complaint (&symfile_complaints
,
1911 _("statement list doesn't fit in .debug_line section"));
1915 dwarf2_debug_line_missing_file_complaint (void)
1917 complaint (&symfile_complaints
,
1918 _(".debug_line section has line data without a file"));
1922 dwarf2_debug_line_missing_end_sequence_complaint (void)
1924 complaint (&symfile_complaints
,
1925 _(".debug_line section has line "
1926 "program sequence without an end"));
1930 dwarf2_complex_location_expr_complaint (void)
1932 complaint (&symfile_complaints
, _("location expression too complex"));
1936 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1939 complaint (&symfile_complaints
,
1940 _("const value length mismatch for '%s', got %d, expected %d"),
1945 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1947 complaint (&symfile_complaints
,
1948 _("debug info runs off end of %s section"
1950 get_section_name (section
),
1951 get_section_file_name (section
));
1955 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1957 complaint (&symfile_complaints
,
1958 _("macro debug info contains a "
1959 "malformed macro definition:\n`%s'"),
1964 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1966 complaint (&symfile_complaints
,
1967 _("invalid attribute class or form for '%s' in '%s'"),
1971 /* Hash function for line_header_hash. */
1974 line_header_hash (const struct line_header
*ofs
)
1976 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1979 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1982 line_header_hash_voidp (const void *item
)
1984 const struct line_header
*ofs
= (const struct line_header
*) item
;
1986 return line_header_hash (ofs
);
1989 /* Equality function for line_header_hash. */
1992 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1994 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1995 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1997 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
1998 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2004 /* Convert VALUE between big- and little-endian. */
2006 byte_swap (offset_type value
)
2010 result
= (value
& 0xff) << 24;
2011 result
|= (value
& 0xff00) << 8;
2012 result
|= (value
& 0xff0000) >> 8;
2013 result
|= (value
& 0xff000000) >> 24;
2017 #define MAYBE_SWAP(V) byte_swap (V)
2020 #define MAYBE_SWAP(V) (V)
2021 #endif /* WORDS_BIGENDIAN */
2023 /* Read the given attribute value as an address, taking the attribute's
2024 form into account. */
2027 attr_value_as_address (struct attribute
*attr
)
2031 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2033 /* Aside from a few clearly defined exceptions, attributes that
2034 contain an address must always be in DW_FORM_addr form.
2035 Unfortunately, some compilers happen to be violating this
2036 requirement by encoding addresses using other forms, such
2037 as DW_FORM_data4 for example. For those broken compilers,
2038 we try to do our best, without any guarantee of success,
2039 to interpret the address correctly. It would also be nice
2040 to generate a complaint, but that would require us to maintain
2041 a list of legitimate cases where a non-address form is allowed,
2042 as well as update callers to pass in at least the CU's DWARF
2043 version. This is more overhead than what we're willing to
2044 expand for a pretty rare case. */
2045 addr
= DW_UNSND (attr
);
2048 addr
= DW_ADDR (attr
);
2053 /* The suffix for an index file. */
2054 #define INDEX_SUFFIX ".gdb-index"
2056 /* Try to locate the sections we need for DWARF 2 debugging
2057 information and return true if we have enough to do something.
2058 NAMES points to the dwarf2 section names, or is NULL if the standard
2059 ELF names are used. */
2062 dwarf2_has_info (struct objfile
*objfile
,
2063 const struct dwarf2_debug_sections
*names
)
2065 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2066 objfile_data (objfile
, dwarf2_objfile_data_key
));
2067 if (!dwarf2_per_objfile
)
2069 /* Initialize per-objfile state. */
2070 struct dwarf2_per_objfile
*data
2071 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2073 memset (data
, 0, sizeof (*data
));
2074 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2075 dwarf2_per_objfile
= data
;
2077 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2079 dwarf2_per_objfile
->objfile
= objfile
;
2081 return (!dwarf2_per_objfile
->info
.is_virtual
2082 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2083 && !dwarf2_per_objfile
->abbrev
.is_virtual
2084 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2087 /* Return the containing section of virtual section SECTION. */
2089 static struct dwarf2_section_info
*
2090 get_containing_section (const struct dwarf2_section_info
*section
)
2092 gdb_assert (section
->is_virtual
);
2093 return section
->s
.containing_section
;
2096 /* Return the bfd owner of SECTION. */
2099 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2101 if (section
->is_virtual
)
2103 section
= get_containing_section (section
);
2104 gdb_assert (!section
->is_virtual
);
2106 return section
->s
.section
->owner
;
2109 /* Return the bfd section of SECTION.
2110 Returns NULL if the section is not present. */
2113 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2115 if (section
->is_virtual
)
2117 section
= get_containing_section (section
);
2118 gdb_assert (!section
->is_virtual
);
2120 return section
->s
.section
;
2123 /* Return the name of SECTION. */
2126 get_section_name (const struct dwarf2_section_info
*section
)
2128 asection
*sectp
= get_section_bfd_section (section
);
2130 gdb_assert (sectp
!= NULL
);
2131 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2134 /* Return the name of the file SECTION is in. */
2137 get_section_file_name (const struct dwarf2_section_info
*section
)
2139 bfd
*abfd
= get_section_bfd_owner (section
);
2141 return bfd_get_filename (abfd
);
2144 /* Return the id of SECTION.
2145 Returns 0 if SECTION doesn't exist. */
2148 get_section_id (const struct dwarf2_section_info
*section
)
2150 asection
*sectp
= get_section_bfd_section (section
);
2157 /* Return the flags of SECTION.
2158 SECTION (or containing section if this is a virtual section) must exist. */
2161 get_section_flags (const struct dwarf2_section_info
*section
)
2163 asection
*sectp
= get_section_bfd_section (section
);
2165 gdb_assert (sectp
!= NULL
);
2166 return bfd_get_section_flags (sectp
->owner
, sectp
);
2169 /* When loading sections, we look either for uncompressed section or for
2170 compressed section names. */
2173 section_is_p (const char *section_name
,
2174 const struct dwarf2_section_names
*names
)
2176 if (names
->normal
!= NULL
2177 && strcmp (section_name
, names
->normal
) == 0)
2179 if (names
->compressed
!= NULL
2180 && strcmp (section_name
, names
->compressed
) == 0)
2185 /* This function is mapped across the sections and remembers the
2186 offset and size of each of the debugging sections we are interested
2190 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2192 const struct dwarf2_debug_sections
*names
;
2193 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2196 names
= &dwarf2_elf_names
;
2198 names
= (const struct dwarf2_debug_sections
*) vnames
;
2200 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2203 else if (section_is_p (sectp
->name
, &names
->info
))
2205 dwarf2_per_objfile
->info
.s
.section
= sectp
;
2206 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2208 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2210 dwarf2_per_objfile
->abbrev
.s
.section
= sectp
;
2211 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2213 else if (section_is_p (sectp
->name
, &names
->line
))
2215 dwarf2_per_objfile
->line
.s
.section
= sectp
;
2216 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2218 else if (section_is_p (sectp
->name
, &names
->loc
))
2220 dwarf2_per_objfile
->loc
.s
.section
= sectp
;
2221 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2223 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2225 dwarf2_per_objfile
->macinfo
.s
.section
= sectp
;
2226 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2228 else if (section_is_p (sectp
->name
, &names
->macro
))
2230 dwarf2_per_objfile
->macro
.s
.section
= sectp
;
2231 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2233 else if (section_is_p (sectp
->name
, &names
->str
))
2235 dwarf2_per_objfile
->str
.s
.section
= sectp
;
2236 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2238 else if (section_is_p (sectp
->name
, &names
->addr
))
2240 dwarf2_per_objfile
->addr
.s
.section
= sectp
;
2241 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2243 else if (section_is_p (sectp
->name
, &names
->frame
))
2245 dwarf2_per_objfile
->frame
.s
.section
= sectp
;
2246 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2248 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2250 dwarf2_per_objfile
->eh_frame
.s
.section
= sectp
;
2251 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2253 else if (section_is_p (sectp
->name
, &names
->ranges
))
2255 dwarf2_per_objfile
->ranges
.s
.section
= sectp
;
2256 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2258 else if (section_is_p (sectp
->name
, &names
->types
))
2260 struct dwarf2_section_info type_section
;
2262 memset (&type_section
, 0, sizeof (type_section
));
2263 type_section
.s
.section
= sectp
;
2264 type_section
.size
= bfd_get_section_size (sectp
);
2266 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2269 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2271 dwarf2_per_objfile
->gdb_index
.s
.section
= sectp
;
2272 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2275 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2276 && bfd_section_vma (abfd
, sectp
) == 0)
2277 dwarf2_per_objfile
->has_section_at_zero
= 1;
2280 /* A helper function that decides whether a section is empty,
2284 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2286 if (section
->is_virtual
)
2287 return section
->size
== 0;
2288 return section
->s
.section
== NULL
|| section
->size
== 0;
2291 /* Read the contents of the section INFO.
2292 OBJFILE is the main object file, but not necessarily the file where
2293 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2295 If the section is compressed, uncompress it before returning. */
2298 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2302 gdb_byte
*buf
, *retbuf
;
2306 info
->buffer
= NULL
;
2309 if (dwarf2_section_empty_p (info
))
2312 sectp
= get_section_bfd_section (info
);
2314 /* If this is a virtual section we need to read in the real one first. */
2315 if (info
->is_virtual
)
2317 struct dwarf2_section_info
*containing_section
=
2318 get_containing_section (info
);
2320 gdb_assert (sectp
!= NULL
);
2321 if ((sectp
->flags
& SEC_RELOC
) != 0)
2323 error (_("Dwarf Error: DWP format V2 with relocations is not"
2324 " supported in section %s [in module %s]"),
2325 get_section_name (info
), get_section_file_name (info
));
2327 dwarf2_read_section (objfile
, containing_section
);
2328 /* Other code should have already caught virtual sections that don't
2330 gdb_assert (info
->virtual_offset
+ info
->size
2331 <= containing_section
->size
);
2332 /* If the real section is empty or there was a problem reading the
2333 section we shouldn't get here. */
2334 gdb_assert (containing_section
->buffer
!= NULL
);
2335 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2339 /* If the section has relocations, we must read it ourselves.
2340 Otherwise we attach it to the BFD. */
2341 if ((sectp
->flags
& SEC_RELOC
) == 0)
2343 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2347 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2350 /* When debugging .o files, we may need to apply relocations; see
2351 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2352 We never compress sections in .o files, so we only need to
2353 try this when the section is not compressed. */
2354 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2357 info
->buffer
= retbuf
;
2361 abfd
= get_section_bfd_owner (info
);
2362 gdb_assert (abfd
!= NULL
);
2364 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2365 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2367 error (_("Dwarf Error: Can't read DWARF data"
2368 " in section %s [in module %s]"),
2369 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2373 /* A helper function that returns the size of a section in a safe way.
2374 If you are positive that the section has been read before using the
2375 size, then it is safe to refer to the dwarf2_section_info object's
2376 "size" field directly. In other cases, you must call this
2377 function, because for compressed sections the size field is not set
2378 correctly until the section has been read. */
2380 static bfd_size_type
2381 dwarf2_section_size (struct objfile
*objfile
,
2382 struct dwarf2_section_info
*info
)
2385 dwarf2_read_section (objfile
, info
);
2389 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2393 dwarf2_get_section_info (struct objfile
*objfile
,
2394 enum dwarf2_section_enum sect
,
2395 asection
**sectp
, const gdb_byte
**bufp
,
2396 bfd_size_type
*sizep
)
2398 struct dwarf2_per_objfile
*data
2399 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2400 dwarf2_objfile_data_key
);
2401 struct dwarf2_section_info
*info
;
2403 /* We may see an objfile without any DWARF, in which case we just
2414 case DWARF2_DEBUG_FRAME
:
2415 info
= &data
->frame
;
2417 case DWARF2_EH_FRAME
:
2418 info
= &data
->eh_frame
;
2421 gdb_assert_not_reached ("unexpected section");
2424 dwarf2_read_section (objfile
, info
);
2426 *sectp
= get_section_bfd_section (info
);
2427 *bufp
= info
->buffer
;
2428 *sizep
= info
->size
;
2431 /* A helper function to find the sections for a .dwz file. */
2434 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2436 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2438 /* Note that we only support the standard ELF names, because .dwz
2439 is ELF-only (at the time of writing). */
2440 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2442 dwz_file
->abbrev
.s
.section
= sectp
;
2443 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2445 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2447 dwz_file
->info
.s
.section
= sectp
;
2448 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2450 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2452 dwz_file
->str
.s
.section
= sectp
;
2453 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2455 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2457 dwz_file
->line
.s
.section
= sectp
;
2458 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2460 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2462 dwz_file
->macro
.s
.section
= sectp
;
2463 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2465 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2467 dwz_file
->gdb_index
.s
.section
= sectp
;
2468 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2472 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2473 there is no .gnu_debugaltlink section in the file. Error if there
2474 is such a section but the file cannot be found. */
2476 static struct dwz_file
*
2477 dwarf2_get_dwz_file (void)
2481 struct cleanup
*cleanup
;
2482 const char *filename
;
2483 struct dwz_file
*result
;
2484 bfd_size_type buildid_len_arg
;
2488 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2489 return dwarf2_per_objfile
->dwz_file
;
2491 bfd_set_error (bfd_error_no_error
);
2492 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2493 &buildid_len_arg
, &buildid
);
2496 if (bfd_get_error () == bfd_error_no_error
)
2498 error (_("could not read '.gnu_debugaltlink' section: %s"),
2499 bfd_errmsg (bfd_get_error ()));
2501 cleanup
= make_cleanup (xfree
, data
);
2502 make_cleanup (xfree
, buildid
);
2504 buildid_len
= (size_t) buildid_len_arg
;
2506 filename
= (const char *) data
;
2507 if (!IS_ABSOLUTE_PATH (filename
))
2509 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2512 make_cleanup (xfree
, abs
);
2513 abs
= ldirname (abs
);
2514 make_cleanup (xfree
, abs
);
2516 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2517 make_cleanup (xfree
, rel
);
2521 /* First try the file name given in the section. If that doesn't
2522 work, try to use the build-id instead. */
2523 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2524 if (dwz_bfd
!= NULL
)
2526 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2528 gdb_bfd_unref (dwz_bfd
);
2533 if (dwz_bfd
== NULL
)
2534 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2536 if (dwz_bfd
== NULL
)
2537 error (_("could not find '.gnu_debugaltlink' file for %s"),
2538 objfile_name (dwarf2_per_objfile
->objfile
));
2540 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2542 result
->dwz_bfd
= dwz_bfd
;
2544 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2546 do_cleanups (cleanup
);
2548 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2549 dwarf2_per_objfile
->dwz_file
= result
;
2553 /* DWARF quick_symbols_functions support. */
2555 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2556 unique line tables, so we maintain a separate table of all .debug_line
2557 derived entries to support the sharing.
2558 All the quick functions need is the list of file names. We discard the
2559 line_header when we're done and don't need to record it here. */
2560 struct quick_file_names
2562 /* The data used to construct the hash key. */
2563 struct stmt_list_hash hash
;
2565 /* The number of entries in file_names, real_names. */
2566 unsigned int num_file_names
;
2568 /* The file names from the line table, after being run through
2570 const char **file_names
;
2572 /* The file names from the line table after being run through
2573 gdb_realpath. These are computed lazily. */
2574 const char **real_names
;
2577 /* When using the index (and thus not using psymtabs), each CU has an
2578 object of this type. This is used to hold information needed by
2579 the various "quick" methods. */
2580 struct dwarf2_per_cu_quick_data
2582 /* The file table. This can be NULL if there was no file table
2583 or it's currently not read in.
2584 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2585 struct quick_file_names
*file_names
;
2587 /* The corresponding symbol table. This is NULL if symbols for this
2588 CU have not yet been read. */
2589 struct compunit_symtab
*compunit_symtab
;
2591 /* A temporary mark bit used when iterating over all CUs in
2592 expand_symtabs_matching. */
2593 unsigned int mark
: 1;
2595 /* True if we've tried to read the file table and found there isn't one.
2596 There will be no point in trying to read it again next time. */
2597 unsigned int no_file_data
: 1;
2600 /* Utility hash function for a stmt_list_hash. */
2603 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2607 if (stmt_list_hash
->dwo_unit
!= NULL
)
2608 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2609 v
+= stmt_list_hash
->line_offset
.sect_off
;
2613 /* Utility equality function for a stmt_list_hash. */
2616 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2617 const struct stmt_list_hash
*rhs
)
2619 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2621 if (lhs
->dwo_unit
!= NULL
2622 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2625 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2628 /* Hash function for a quick_file_names. */
2631 hash_file_name_entry (const void *e
)
2633 const struct quick_file_names
*file_data
2634 = (const struct quick_file_names
*) e
;
2636 return hash_stmt_list_entry (&file_data
->hash
);
2639 /* Equality function for a quick_file_names. */
2642 eq_file_name_entry (const void *a
, const void *b
)
2644 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2645 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2647 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2650 /* Delete function for a quick_file_names. */
2653 delete_file_name_entry (void *e
)
2655 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2658 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2660 xfree ((void*) file_data
->file_names
[i
]);
2661 if (file_data
->real_names
)
2662 xfree ((void*) file_data
->real_names
[i
]);
2665 /* The space for the struct itself lives on objfile_obstack,
2666 so we don't free it here. */
2669 /* Create a quick_file_names hash table. */
2672 create_quick_file_names_table (unsigned int nr_initial_entries
)
2674 return htab_create_alloc (nr_initial_entries
,
2675 hash_file_name_entry
, eq_file_name_entry
,
2676 delete_file_name_entry
, xcalloc
, xfree
);
2679 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2680 have to be created afterwards. You should call age_cached_comp_units after
2681 processing PER_CU->CU. dw2_setup must have been already called. */
2684 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2686 if (per_cu
->is_debug_types
)
2687 load_full_type_unit (per_cu
);
2689 load_full_comp_unit (per_cu
, language_minimal
);
2691 if (per_cu
->cu
== NULL
)
2692 return; /* Dummy CU. */
2694 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2697 /* Read in the symbols for PER_CU. */
2700 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2702 struct cleanup
*back_to
;
2704 /* Skip type_unit_groups, reading the type units they contain
2705 is handled elsewhere. */
2706 if (IS_TYPE_UNIT_GROUP (per_cu
))
2709 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2711 if (dwarf2_per_objfile
->using_index
2712 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2713 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2715 queue_comp_unit (per_cu
, language_minimal
);
2718 /* If we just loaded a CU from a DWO, and we're working with an index
2719 that may badly handle TUs, load all the TUs in that DWO as well.
2720 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2721 if (!per_cu
->is_debug_types
2722 && per_cu
->cu
!= NULL
2723 && per_cu
->cu
->dwo_unit
!= NULL
2724 && dwarf2_per_objfile
->index_table
!= NULL
2725 && dwarf2_per_objfile
->index_table
->version
<= 7
2726 /* DWP files aren't supported yet. */
2727 && get_dwp_file () == NULL
)
2728 queue_and_load_all_dwo_tus (per_cu
);
2733 /* Age the cache, releasing compilation units that have not
2734 been used recently. */
2735 age_cached_comp_units ();
2737 do_cleanups (back_to
);
2740 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2741 the objfile from which this CU came. Returns the resulting symbol
2744 static struct compunit_symtab
*
2745 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2747 gdb_assert (dwarf2_per_objfile
->using_index
);
2748 if (!per_cu
->v
.quick
->compunit_symtab
)
2750 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2751 increment_reading_symtab ();
2752 dw2_do_instantiate_symtab (per_cu
);
2753 process_cu_includes ();
2754 do_cleanups (back_to
);
2757 return per_cu
->v
.quick
->compunit_symtab
;
2760 /* Return the CU/TU given its index.
2762 This is intended for loops like:
2764 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2765 + dwarf2_per_objfile->n_type_units); ++i)
2767 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2773 static struct dwarf2_per_cu_data
*
2774 dw2_get_cutu (int index
)
2776 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2778 index
-= dwarf2_per_objfile
->n_comp_units
;
2779 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2780 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2783 return dwarf2_per_objfile
->all_comp_units
[index
];
2786 /* Return the CU given its index.
2787 This differs from dw2_get_cutu in that it's for when you know INDEX
2790 static struct dwarf2_per_cu_data
*
2791 dw2_get_cu (int index
)
2793 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2795 return dwarf2_per_objfile
->all_comp_units
[index
];
2798 /* A helper for create_cus_from_index that handles a given list of
2802 create_cus_from_index_list (struct objfile
*objfile
,
2803 const gdb_byte
*cu_list
, offset_type n_elements
,
2804 struct dwarf2_section_info
*section
,
2810 for (i
= 0; i
< n_elements
; i
+= 2)
2812 struct dwarf2_per_cu_data
*the_cu
;
2813 ULONGEST offset
, length
;
2815 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2816 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2817 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2820 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2821 struct dwarf2_per_cu_data
);
2822 the_cu
->offset
.sect_off
= offset
;
2823 the_cu
->length
= length
;
2824 the_cu
->objfile
= objfile
;
2825 the_cu
->section
= section
;
2826 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2827 struct dwarf2_per_cu_quick_data
);
2828 the_cu
->is_dwz
= is_dwz
;
2829 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2833 /* Read the CU list from the mapped index, and use it to create all
2834 the CU objects for this objfile. */
2837 create_cus_from_index (struct objfile
*objfile
,
2838 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2839 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2841 struct dwz_file
*dwz
;
2843 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2844 dwarf2_per_objfile
->all_comp_units
=
2845 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
2846 dwarf2_per_objfile
->n_comp_units
);
2848 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2849 &dwarf2_per_objfile
->info
, 0, 0);
2851 if (dwz_elements
== 0)
2854 dwz
= dwarf2_get_dwz_file ();
2855 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2856 cu_list_elements
/ 2);
2859 /* Create the signatured type hash table from the index. */
2862 create_signatured_type_table_from_index (struct objfile
*objfile
,
2863 struct dwarf2_section_info
*section
,
2864 const gdb_byte
*bytes
,
2865 offset_type elements
)
2868 htab_t sig_types_hash
;
2870 dwarf2_per_objfile
->n_type_units
2871 = dwarf2_per_objfile
->n_allocated_type_units
2873 dwarf2_per_objfile
->all_type_units
=
2874 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
2876 sig_types_hash
= allocate_signatured_type_table (objfile
);
2878 for (i
= 0; i
< elements
; i
+= 3)
2880 struct signatured_type
*sig_type
;
2881 ULONGEST offset
, type_offset_in_tu
, signature
;
2884 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2885 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2886 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2888 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2891 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2892 struct signatured_type
);
2893 sig_type
->signature
= signature
;
2894 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2895 sig_type
->per_cu
.is_debug_types
= 1;
2896 sig_type
->per_cu
.section
= section
;
2897 sig_type
->per_cu
.offset
.sect_off
= offset
;
2898 sig_type
->per_cu
.objfile
= objfile
;
2899 sig_type
->per_cu
.v
.quick
2900 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2901 struct dwarf2_per_cu_quick_data
);
2903 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2906 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2909 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2912 /* Read the address map data from the mapped index, and use it to
2913 populate the objfile's psymtabs_addrmap. */
2916 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2918 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2919 const gdb_byte
*iter
, *end
;
2920 struct obstack temp_obstack
;
2921 struct addrmap
*mutable_map
;
2922 struct cleanup
*cleanup
;
2925 obstack_init (&temp_obstack
);
2926 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2927 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2929 iter
= index
->address_table
;
2930 end
= iter
+ index
->address_table_size
;
2932 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2936 ULONGEST hi
, lo
, cu_index
;
2937 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2939 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2941 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2946 complaint (&symfile_complaints
,
2947 _(".gdb_index address table has invalid range (%s - %s)"),
2948 hex_string (lo
), hex_string (hi
));
2952 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2954 complaint (&symfile_complaints
,
2955 _(".gdb_index address table has invalid CU number %u"),
2956 (unsigned) cu_index
);
2960 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2961 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2962 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2965 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2966 &objfile
->objfile_obstack
);
2967 do_cleanups (cleanup
);
2970 /* The hash function for strings in the mapped index. This is the same as
2971 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2972 implementation. This is necessary because the hash function is tied to the
2973 format of the mapped index file. The hash values do not have to match with
2976 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2979 mapped_index_string_hash (int index_version
, const void *p
)
2981 const unsigned char *str
= (const unsigned char *) p
;
2985 while ((c
= *str
++) != 0)
2987 if (index_version
>= 5)
2989 r
= r
* 67 + c
- 113;
2995 /* Find a slot in the mapped index INDEX for the object named NAME.
2996 If NAME is found, set *VEC_OUT to point to the CU vector in the
2997 constant pool and return 1. If NAME cannot be found, return 0. */
3000 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3001 offset_type
**vec_out
)
3003 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3005 offset_type slot
, step
;
3006 int (*cmp
) (const char *, const char *);
3008 if (current_language
->la_language
== language_cplus
3009 || current_language
->la_language
== language_java
3010 || current_language
->la_language
== language_fortran
3011 || current_language
->la_language
== language_d
)
3013 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3016 if (strchr (name
, '(') != NULL
)
3018 char *without_params
= cp_remove_params (name
);
3020 if (without_params
!= NULL
)
3022 make_cleanup (xfree
, without_params
);
3023 name
= without_params
;
3028 /* Index version 4 did not support case insensitive searches. But the
3029 indices for case insensitive languages are built in lowercase, therefore
3030 simulate our NAME being searched is also lowercased. */
3031 hash
= mapped_index_string_hash ((index
->version
== 4
3032 && case_sensitivity
== case_sensitive_off
3033 ? 5 : index
->version
),
3036 slot
= hash
& (index
->symbol_table_slots
- 1);
3037 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3038 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3042 /* Convert a slot number to an offset into the table. */
3043 offset_type i
= 2 * slot
;
3045 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3047 do_cleanups (back_to
);
3051 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3052 if (!cmp (name
, str
))
3054 *vec_out
= (offset_type
*) (index
->constant_pool
3055 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3056 do_cleanups (back_to
);
3060 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3064 /* A helper function that reads the .gdb_index from SECTION and fills
3065 in MAP. FILENAME is the name of the file containing the section;
3066 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3067 ok to use deprecated sections.
3069 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3070 out parameters that are filled in with information about the CU and
3071 TU lists in the section.
3073 Returns 1 if all went well, 0 otherwise. */
3076 read_index_from_section (struct objfile
*objfile
,
3077 const char *filename
,
3079 struct dwarf2_section_info
*section
,
3080 struct mapped_index
*map
,
3081 const gdb_byte
**cu_list
,
3082 offset_type
*cu_list_elements
,
3083 const gdb_byte
**types_list
,
3084 offset_type
*types_list_elements
)
3086 const gdb_byte
*addr
;
3087 offset_type version
;
3088 offset_type
*metadata
;
3091 if (dwarf2_section_empty_p (section
))
3094 /* Older elfutils strip versions could keep the section in the main
3095 executable while splitting it for the separate debug info file. */
3096 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3099 dwarf2_read_section (objfile
, section
);
3101 addr
= section
->buffer
;
3102 /* Version check. */
3103 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3104 /* Versions earlier than 3 emitted every copy of a psymbol. This
3105 causes the index to behave very poorly for certain requests. Version 3
3106 contained incomplete addrmap. So, it seems better to just ignore such
3110 static int warning_printed
= 0;
3111 if (!warning_printed
)
3113 warning (_("Skipping obsolete .gdb_index section in %s."),
3115 warning_printed
= 1;
3119 /* Index version 4 uses a different hash function than index version
3122 Versions earlier than 6 did not emit psymbols for inlined
3123 functions. Using these files will cause GDB not to be able to
3124 set breakpoints on inlined functions by name, so we ignore these
3125 indices unless the user has done
3126 "set use-deprecated-index-sections on". */
3127 if (version
< 6 && !deprecated_ok
)
3129 static int warning_printed
= 0;
3130 if (!warning_printed
)
3133 Skipping deprecated .gdb_index section in %s.\n\
3134 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3135 to use the section anyway."),
3137 warning_printed
= 1;
3141 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3142 of the TU (for symbols coming from TUs),
3143 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3144 Plus gold-generated indices can have duplicate entries for global symbols,
3145 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3146 These are just performance bugs, and we can't distinguish gdb-generated
3147 indices from gold-generated ones, so issue no warning here. */
3149 /* Indexes with higher version than the one supported by GDB may be no
3150 longer backward compatible. */
3154 map
->version
= version
;
3155 map
->total_size
= section
->size
;
3157 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3160 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3161 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3165 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3166 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3167 - MAYBE_SWAP (metadata
[i
]))
3171 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3172 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3173 - MAYBE_SWAP (metadata
[i
]));
3176 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3177 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3178 - MAYBE_SWAP (metadata
[i
]))
3179 / (2 * sizeof (offset_type
)));
3182 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3188 /* Read the index file. If everything went ok, initialize the "quick"
3189 elements of all the CUs and return 1. Otherwise, return 0. */
3192 dwarf2_read_index (struct objfile
*objfile
)
3194 struct mapped_index local_map
, *map
;
3195 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3196 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3197 struct dwz_file
*dwz
;
3199 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3200 use_deprecated_index_sections
,
3201 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3202 &cu_list
, &cu_list_elements
,
3203 &types_list
, &types_list_elements
))
3206 /* Don't use the index if it's empty. */
3207 if (local_map
.symbol_table_slots
== 0)
3210 /* If there is a .dwz file, read it so we can get its CU list as
3212 dwz
= dwarf2_get_dwz_file ();
3215 struct mapped_index dwz_map
;
3216 const gdb_byte
*dwz_types_ignore
;
3217 offset_type dwz_types_elements_ignore
;
3219 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3221 &dwz
->gdb_index
, &dwz_map
,
3222 &dwz_list
, &dwz_list_elements
,
3224 &dwz_types_elements_ignore
))
3226 warning (_("could not read '.gdb_index' section from %s; skipping"),
3227 bfd_get_filename (dwz
->dwz_bfd
));
3232 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3235 if (types_list_elements
)
3237 struct dwarf2_section_info
*section
;
3239 /* We can only handle a single .debug_types when we have an
3241 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3244 section
= VEC_index (dwarf2_section_info_def
,
3245 dwarf2_per_objfile
->types
, 0);
3247 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3248 types_list_elements
);
3251 create_addrmap_from_index (objfile
, &local_map
);
3253 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3256 dwarf2_per_objfile
->index_table
= map
;
3257 dwarf2_per_objfile
->using_index
= 1;
3258 dwarf2_per_objfile
->quick_file_names_table
=
3259 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3264 /* A helper for the "quick" functions which sets the global
3265 dwarf2_per_objfile according to OBJFILE. */
3268 dw2_setup (struct objfile
*objfile
)
3270 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3271 objfile_data (objfile
, dwarf2_objfile_data_key
));
3272 gdb_assert (dwarf2_per_objfile
);
3275 /* die_reader_func for dw2_get_file_names. */
3278 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3279 const gdb_byte
*info_ptr
,
3280 struct die_info
*comp_unit_die
,
3284 struct dwarf2_cu
*cu
= reader
->cu
;
3285 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3286 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3287 struct dwarf2_per_cu_data
*lh_cu
;
3288 struct line_header
*lh
;
3289 struct attribute
*attr
;
3291 const char *name
, *comp_dir
;
3293 struct quick_file_names
*qfn
;
3294 unsigned int line_offset
;
3296 gdb_assert (! this_cu
->is_debug_types
);
3298 /* Our callers never want to match partial units -- instead they
3299 will match the enclosing full CU. */
3300 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3302 this_cu
->v
.quick
->no_file_data
= 1;
3311 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3314 struct quick_file_names find_entry
;
3316 line_offset
= DW_UNSND (attr
);
3318 /* We may have already read in this line header (TU line header sharing).
3319 If we have we're done. */
3320 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3321 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3322 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3323 &find_entry
, INSERT
);
3326 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3330 lh
= dwarf_decode_line_header (line_offset
, cu
);
3334 lh_cu
->v
.quick
->no_file_data
= 1;
3338 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3339 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3340 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3341 gdb_assert (slot
!= NULL
);
3344 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3346 qfn
->num_file_names
= lh
->num_file_names
;
3348 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->num_file_names
);
3349 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3350 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3351 qfn
->real_names
= NULL
;
3353 free_line_header (lh
);
3355 lh_cu
->v
.quick
->file_names
= qfn
;
3358 /* A helper for the "quick" functions which attempts to read the line
3359 table for THIS_CU. */
3361 static struct quick_file_names
*
3362 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3364 /* This should never be called for TUs. */
3365 gdb_assert (! this_cu
->is_debug_types
);
3366 /* Nor type unit groups. */
3367 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3369 if (this_cu
->v
.quick
->file_names
!= NULL
)
3370 return this_cu
->v
.quick
->file_names
;
3371 /* If we know there is no line data, no point in looking again. */
3372 if (this_cu
->v
.quick
->no_file_data
)
3375 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3377 if (this_cu
->v
.quick
->no_file_data
)
3379 return this_cu
->v
.quick
->file_names
;
3382 /* A helper for the "quick" functions which computes and caches the
3383 real path for a given file name from the line table. */
3386 dw2_get_real_path (struct objfile
*objfile
,
3387 struct quick_file_names
*qfn
, int index
)
3389 if (qfn
->real_names
== NULL
)
3390 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3391 qfn
->num_file_names
, const char *);
3393 if (qfn
->real_names
[index
] == NULL
)
3394 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3396 return qfn
->real_names
[index
];
3399 static struct symtab
*
3400 dw2_find_last_source_symtab (struct objfile
*objfile
)
3402 struct compunit_symtab
*cust
;
3405 dw2_setup (objfile
);
3406 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3407 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3410 return compunit_primary_filetab (cust
);
3413 /* Traversal function for dw2_forget_cached_source_info. */
3416 dw2_free_cached_file_names (void **slot
, void *info
)
3418 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3420 if (file_data
->real_names
)
3424 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3426 xfree ((void*) file_data
->real_names
[i
]);
3427 file_data
->real_names
[i
] = NULL
;
3435 dw2_forget_cached_source_info (struct objfile
*objfile
)
3437 dw2_setup (objfile
);
3439 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3440 dw2_free_cached_file_names
, NULL
);
3443 /* Helper function for dw2_map_symtabs_matching_filename that expands
3444 the symtabs and calls the iterator. */
3447 dw2_map_expand_apply (struct objfile
*objfile
,
3448 struct dwarf2_per_cu_data
*per_cu
,
3449 const char *name
, const char *real_path
,
3450 int (*callback
) (struct symtab
*, void *),
3453 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3455 /* Don't visit already-expanded CUs. */
3456 if (per_cu
->v
.quick
->compunit_symtab
)
3459 /* This may expand more than one symtab, and we want to iterate over
3461 dw2_instantiate_symtab (per_cu
);
3463 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3464 objfile
->compunit_symtabs
, last_made
);
3467 /* Implementation of the map_symtabs_matching_filename method. */
3470 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3471 const char *real_path
,
3472 int (*callback
) (struct symtab
*, void *),
3476 const char *name_basename
= lbasename (name
);
3478 dw2_setup (objfile
);
3480 /* The rule is CUs specify all the files, including those used by
3481 any TU, so there's no need to scan TUs here. */
3483 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3486 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3487 struct quick_file_names
*file_data
;
3489 /* We only need to look at symtabs not already expanded. */
3490 if (per_cu
->v
.quick
->compunit_symtab
)
3493 file_data
= dw2_get_file_names (per_cu
);
3494 if (file_data
== NULL
)
3497 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3499 const char *this_name
= file_data
->file_names
[j
];
3500 const char *this_real_name
;
3502 if (compare_filenames_for_search (this_name
, name
))
3504 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3510 /* Before we invoke realpath, which can get expensive when many
3511 files are involved, do a quick comparison of the basenames. */
3512 if (! basenames_may_differ
3513 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3516 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3517 if (compare_filenames_for_search (this_real_name
, name
))
3519 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3525 if (real_path
!= NULL
)
3527 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3528 gdb_assert (IS_ABSOLUTE_PATH (name
));
3529 if (this_real_name
!= NULL
3530 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3532 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3544 /* Struct used to manage iterating over all CUs looking for a symbol. */
3546 struct dw2_symtab_iterator
3548 /* The internalized form of .gdb_index. */
3549 struct mapped_index
*index
;
3550 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3551 int want_specific_block
;
3552 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3553 Unused if !WANT_SPECIFIC_BLOCK. */
3555 /* The kind of symbol we're looking for. */
3557 /* The list of CUs from the index entry of the symbol,
3558 or NULL if not found. */
3560 /* The next element in VEC to look at. */
3562 /* The number of elements in VEC, or zero if there is no match. */
3564 /* Have we seen a global version of the symbol?
3565 If so we can ignore all further global instances.
3566 This is to work around gold/15646, inefficient gold-generated
3571 /* Initialize the index symtab iterator ITER.
3572 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3573 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3576 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3577 struct mapped_index
*index
,
3578 int want_specific_block
,
3583 iter
->index
= index
;
3584 iter
->want_specific_block
= want_specific_block
;
3585 iter
->block_index
= block_index
;
3586 iter
->domain
= domain
;
3588 iter
->global_seen
= 0;
3590 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3591 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3599 /* Return the next matching CU or NULL if there are no more. */
3601 static struct dwarf2_per_cu_data
*
3602 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3604 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3606 offset_type cu_index_and_attrs
=
3607 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3608 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3609 struct dwarf2_per_cu_data
*per_cu
;
3610 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3611 /* This value is only valid for index versions >= 7. */
3612 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3613 gdb_index_symbol_kind symbol_kind
=
3614 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3615 /* Only check the symbol attributes if they're present.
3616 Indices prior to version 7 don't record them,
3617 and indices >= 7 may elide them for certain symbols
3618 (gold does this). */
3620 (iter
->index
->version
>= 7
3621 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3623 /* Don't crash on bad data. */
3624 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3625 + dwarf2_per_objfile
->n_type_units
))
3627 complaint (&symfile_complaints
,
3628 _(".gdb_index entry has bad CU index"
3630 objfile_name (dwarf2_per_objfile
->objfile
));
3634 per_cu
= dw2_get_cutu (cu_index
);
3636 /* Skip if already read in. */
3637 if (per_cu
->v
.quick
->compunit_symtab
)
3640 /* Check static vs global. */
3643 if (iter
->want_specific_block
3644 && want_static
!= is_static
)
3646 /* Work around gold/15646. */
3647 if (!is_static
&& iter
->global_seen
)
3650 iter
->global_seen
= 1;
3653 /* Only check the symbol's kind if it has one. */
3656 switch (iter
->domain
)
3659 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3660 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3661 /* Some types are also in VAR_DOMAIN. */
3662 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3666 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3670 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3685 static struct compunit_symtab
*
3686 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3687 const char *name
, domain_enum domain
)
3689 struct compunit_symtab
*stab_best
= NULL
;
3690 struct mapped_index
*index
;
3692 dw2_setup (objfile
);
3694 index
= dwarf2_per_objfile
->index_table
;
3696 /* index is NULL if OBJF_READNOW. */
3699 struct dw2_symtab_iterator iter
;
3700 struct dwarf2_per_cu_data
*per_cu
;
3702 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3704 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3706 struct symbol
*sym
, *with_opaque
= NULL
;
3707 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3708 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3709 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3711 sym
= block_find_symbol (block
, name
, domain
,
3712 block_find_non_opaque_type_preferred
,
3715 /* Some caution must be observed with overloaded functions
3716 and methods, since the index will not contain any overload
3717 information (but NAME might contain it). */
3720 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3722 if (with_opaque
!= NULL
3723 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
3726 /* Keep looking through other CUs. */
3734 dw2_print_stats (struct objfile
*objfile
)
3736 int i
, total
, count
;
3738 dw2_setup (objfile
);
3739 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3741 for (i
= 0; i
< total
; ++i
)
3743 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3745 if (!per_cu
->v
.quick
->compunit_symtab
)
3748 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3749 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3752 /* This dumps minimal information about the index.
3753 It is called via "mt print objfiles".
3754 One use is to verify .gdb_index has been loaded by the
3755 gdb.dwarf2/gdb-index.exp testcase. */
3758 dw2_dump (struct objfile
*objfile
)
3760 dw2_setup (objfile
);
3761 gdb_assert (dwarf2_per_objfile
->using_index
);
3762 printf_filtered (".gdb_index:");
3763 if (dwarf2_per_objfile
->index_table
!= NULL
)
3765 printf_filtered (" version %d\n",
3766 dwarf2_per_objfile
->index_table
->version
);
3769 printf_filtered (" faked for \"readnow\"\n");
3770 printf_filtered ("\n");
3774 dw2_relocate (struct objfile
*objfile
,
3775 const struct section_offsets
*new_offsets
,
3776 const struct section_offsets
*delta
)
3778 /* There's nothing to relocate here. */
3782 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3783 const char *func_name
)
3785 struct mapped_index
*index
;
3787 dw2_setup (objfile
);
3789 index
= dwarf2_per_objfile
->index_table
;
3791 /* index is NULL if OBJF_READNOW. */
3794 struct dw2_symtab_iterator iter
;
3795 struct dwarf2_per_cu_data
*per_cu
;
3797 /* Note: It doesn't matter what we pass for block_index here. */
3798 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3801 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3802 dw2_instantiate_symtab (per_cu
);
3807 dw2_expand_all_symtabs (struct objfile
*objfile
)
3811 dw2_setup (objfile
);
3813 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3814 + dwarf2_per_objfile
->n_type_units
); ++i
)
3816 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3818 dw2_instantiate_symtab (per_cu
);
3823 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3824 const char *fullname
)
3828 dw2_setup (objfile
);
3830 /* We don't need to consider type units here.
3831 This is only called for examining code, e.g. expand_line_sal.
3832 There can be an order of magnitude (or more) more type units
3833 than comp units, and we avoid them if we can. */
3835 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3838 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3839 struct quick_file_names
*file_data
;
3841 /* We only need to look at symtabs not already expanded. */
3842 if (per_cu
->v
.quick
->compunit_symtab
)
3845 file_data
= dw2_get_file_names (per_cu
);
3846 if (file_data
== NULL
)
3849 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3851 const char *this_fullname
= file_data
->file_names
[j
];
3853 if (filename_cmp (this_fullname
, fullname
) == 0)
3855 dw2_instantiate_symtab (per_cu
);
3863 dw2_map_matching_symbols (struct objfile
*objfile
,
3864 const char * name
, domain_enum domain
,
3866 int (*callback
) (struct block
*,
3867 struct symbol
*, void *),
3868 void *data
, symbol_compare_ftype
*match
,
3869 symbol_compare_ftype
*ordered_compare
)
3871 /* Currently unimplemented; used for Ada. The function can be called if the
3872 current language is Ada for a non-Ada objfile using GNU index. As Ada
3873 does not look for non-Ada symbols this function should just return. */
3877 dw2_expand_symtabs_matching
3878 (struct objfile
*objfile
,
3879 expand_symtabs_file_matcher_ftype
*file_matcher
,
3880 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3881 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3882 enum search_domain kind
,
3887 struct mapped_index
*index
;
3889 dw2_setup (objfile
);
3891 /* index_table is NULL if OBJF_READNOW. */
3892 if (!dwarf2_per_objfile
->index_table
)
3894 index
= dwarf2_per_objfile
->index_table
;
3896 if (file_matcher
!= NULL
)
3898 struct cleanup
*cleanup
;
3899 htab_t visited_found
, visited_not_found
;
3901 visited_found
= htab_create_alloc (10,
3902 htab_hash_pointer
, htab_eq_pointer
,
3903 NULL
, xcalloc
, xfree
);
3904 cleanup
= make_cleanup_htab_delete (visited_found
);
3905 visited_not_found
= htab_create_alloc (10,
3906 htab_hash_pointer
, htab_eq_pointer
,
3907 NULL
, xcalloc
, xfree
);
3908 make_cleanup_htab_delete (visited_not_found
);
3910 /* The rule is CUs specify all the files, including those used by
3911 any TU, so there's no need to scan TUs here. */
3913 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3916 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3917 struct quick_file_names
*file_data
;
3922 per_cu
->v
.quick
->mark
= 0;
3924 /* We only need to look at symtabs not already expanded. */
3925 if (per_cu
->v
.quick
->compunit_symtab
)
3928 file_data
= dw2_get_file_names (per_cu
);
3929 if (file_data
== NULL
)
3932 if (htab_find (visited_not_found
, file_data
) != NULL
)
3934 else if (htab_find (visited_found
, file_data
) != NULL
)
3936 per_cu
->v
.quick
->mark
= 1;
3940 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3942 const char *this_real_name
;
3944 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3946 per_cu
->v
.quick
->mark
= 1;
3950 /* Before we invoke realpath, which can get expensive when many
3951 files are involved, do a quick comparison of the basenames. */
3952 if (!basenames_may_differ
3953 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3957 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3958 if (file_matcher (this_real_name
, data
, 0))
3960 per_cu
->v
.quick
->mark
= 1;
3965 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3967 : visited_not_found
,
3972 do_cleanups (cleanup
);
3975 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3977 offset_type idx
= 2 * iter
;
3979 offset_type
*vec
, vec_len
, vec_idx
;
3980 int global_seen
= 0;
3984 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3987 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3989 if (! (*symbol_matcher
) (name
, data
))
3992 /* The name was matched, now expand corresponding CUs that were
3994 vec
= (offset_type
*) (index
->constant_pool
3995 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3996 vec_len
= MAYBE_SWAP (vec
[0]);
3997 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3999 struct dwarf2_per_cu_data
*per_cu
;
4000 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4001 /* This value is only valid for index versions >= 7. */
4002 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4003 gdb_index_symbol_kind symbol_kind
=
4004 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4005 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4006 /* Only check the symbol attributes if they're present.
4007 Indices prior to version 7 don't record them,
4008 and indices >= 7 may elide them for certain symbols
4009 (gold does this). */
4011 (index
->version
>= 7
4012 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4014 /* Work around gold/15646. */
4017 if (!is_static
&& global_seen
)
4023 /* Only check the symbol's kind if it has one. */
4028 case VARIABLES_DOMAIN
:
4029 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4032 case FUNCTIONS_DOMAIN
:
4033 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4037 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4045 /* Don't crash on bad data. */
4046 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4047 + dwarf2_per_objfile
->n_type_units
))
4049 complaint (&symfile_complaints
,
4050 _(".gdb_index entry has bad CU index"
4051 " [in module %s]"), objfile_name (objfile
));
4055 per_cu
= dw2_get_cutu (cu_index
);
4056 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4058 int symtab_was_null
=
4059 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4061 dw2_instantiate_symtab (per_cu
);
4063 if (expansion_notify
!= NULL
4065 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4067 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4075 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4078 static struct compunit_symtab
*
4079 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4084 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4085 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4088 if (cust
->includes
== NULL
)
4091 for (i
= 0; cust
->includes
[i
]; ++i
)
4093 struct compunit_symtab
*s
= cust
->includes
[i
];
4095 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4103 static struct compunit_symtab
*
4104 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4105 struct bound_minimal_symbol msymbol
,
4107 struct obj_section
*section
,
4110 struct dwarf2_per_cu_data
*data
;
4111 struct compunit_symtab
*result
;
4113 dw2_setup (objfile
);
4115 if (!objfile
->psymtabs_addrmap
)
4118 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
4123 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4124 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4125 paddress (get_objfile_arch (objfile
), pc
));
4128 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4130 gdb_assert (result
!= NULL
);
4135 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4136 void *data
, int need_fullname
)
4139 struct cleanup
*cleanup
;
4140 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4141 NULL
, xcalloc
, xfree
);
4143 cleanup
= make_cleanup_htab_delete (visited
);
4144 dw2_setup (objfile
);
4146 /* The rule is CUs specify all the files, including those used by
4147 any TU, so there's no need to scan TUs here.
4148 We can ignore file names coming from already-expanded CUs. */
4150 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4152 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4154 if (per_cu
->v
.quick
->compunit_symtab
)
4156 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4159 *slot
= per_cu
->v
.quick
->file_names
;
4163 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4166 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4167 struct quick_file_names
*file_data
;
4170 /* We only need to look at symtabs not already expanded. */
4171 if (per_cu
->v
.quick
->compunit_symtab
)
4174 file_data
= dw2_get_file_names (per_cu
);
4175 if (file_data
== NULL
)
4178 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4181 /* Already visited. */
4186 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4188 const char *this_real_name
;
4191 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4193 this_real_name
= NULL
;
4194 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4198 do_cleanups (cleanup
);
4202 dw2_has_symbols (struct objfile
*objfile
)
4207 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4210 dw2_find_last_source_symtab
,
4211 dw2_forget_cached_source_info
,
4212 dw2_map_symtabs_matching_filename
,
4217 dw2_expand_symtabs_for_function
,
4218 dw2_expand_all_symtabs
,
4219 dw2_expand_symtabs_with_fullname
,
4220 dw2_map_matching_symbols
,
4221 dw2_expand_symtabs_matching
,
4222 dw2_find_pc_sect_compunit_symtab
,
4223 dw2_map_symbol_filenames
4226 /* Initialize for reading DWARF for this objfile. Return 0 if this
4227 file will use psymtabs, or 1 if using the GNU index. */
4230 dwarf2_initialize_objfile (struct objfile
*objfile
)
4232 /* If we're about to read full symbols, don't bother with the
4233 indices. In this case we also don't care if some other debug
4234 format is making psymtabs, because they are all about to be
4236 if ((objfile
->flags
& OBJF_READNOW
))
4240 dwarf2_per_objfile
->using_index
= 1;
4241 create_all_comp_units (objfile
);
4242 create_all_type_units (objfile
);
4243 dwarf2_per_objfile
->quick_file_names_table
=
4244 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4246 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4247 + dwarf2_per_objfile
->n_type_units
); ++i
)
4249 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4251 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4252 struct dwarf2_per_cu_quick_data
);
4255 /* Return 1 so that gdb sees the "quick" functions. However,
4256 these functions will be no-ops because we will have expanded
4261 if (dwarf2_read_index (objfile
))
4269 /* Build a partial symbol table. */
4272 dwarf2_build_psymtabs (struct objfile
*objfile
)
4275 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4277 init_psymbol_list (objfile
, 1024);
4282 /* This isn't really ideal: all the data we allocate on the
4283 objfile's obstack is still uselessly kept around. However,
4284 freeing it seems unsafe. */
4285 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4287 dwarf2_build_psymtabs_hard (objfile
);
4288 discard_cleanups (cleanups
);
4290 CATCH (except
, RETURN_MASK_ERROR
)
4292 exception_print (gdb_stderr
, except
);
4297 /* Return the total length of the CU described by HEADER. */
4300 get_cu_length (const struct comp_unit_head
*header
)
4302 return header
->initial_length_size
+ header
->length
;
4305 /* Return TRUE if OFFSET is within CU_HEADER. */
4308 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4310 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4311 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4313 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4316 /* Find the base address of the compilation unit for range lists and
4317 location lists. It will normally be specified by DW_AT_low_pc.
4318 In DWARF-3 draft 4, the base address could be overridden by
4319 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4320 compilation units with discontinuous ranges. */
4323 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4325 struct attribute
*attr
;
4328 cu
->base_address
= 0;
4330 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4333 cu
->base_address
= attr_value_as_address (attr
);
4338 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4341 cu
->base_address
= attr_value_as_address (attr
);
4347 /* Read in the comp unit header information from the debug_info at info_ptr.
4348 NOTE: This leaves members offset, first_die_offset to be filled in
4351 static const gdb_byte
*
4352 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4353 const gdb_byte
*info_ptr
, bfd
*abfd
)
4356 unsigned int bytes_read
;
4358 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4359 cu_header
->initial_length_size
= bytes_read
;
4360 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4361 info_ptr
+= bytes_read
;
4362 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4364 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4366 info_ptr
+= bytes_read
;
4367 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4369 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4370 if (signed_addr
< 0)
4371 internal_error (__FILE__
, __LINE__
,
4372 _("read_comp_unit_head: dwarf from non elf file"));
4373 cu_header
->signed_addr_p
= signed_addr
;
4378 /* Helper function that returns the proper abbrev section for
4381 static struct dwarf2_section_info
*
4382 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4384 struct dwarf2_section_info
*abbrev
;
4386 if (this_cu
->is_dwz
)
4387 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4389 abbrev
= &dwarf2_per_objfile
->abbrev
;
4394 /* Subroutine of read_and_check_comp_unit_head and
4395 read_and_check_type_unit_head to simplify them.
4396 Perform various error checking on the header. */
4399 error_check_comp_unit_head (struct comp_unit_head
*header
,
4400 struct dwarf2_section_info
*section
,
4401 struct dwarf2_section_info
*abbrev_section
)
4403 const char *filename
= get_section_file_name (section
);
4405 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4406 error (_("Dwarf Error: wrong version in compilation unit header "
4407 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4410 if (header
->abbrev_offset
.sect_off
4411 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4412 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4413 "(offset 0x%lx + 6) [in module %s]"),
4414 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4417 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4418 avoid potential 32-bit overflow. */
4419 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4421 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4422 "(offset 0x%lx + 0) [in module %s]"),
4423 (long) header
->length
, (long) header
->offset
.sect_off
,
4427 /* Read in a CU/TU header and perform some basic error checking.
4428 The contents of the header are stored in HEADER.
4429 The result is a pointer to the start of the first DIE. */
4431 static const gdb_byte
*
4432 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4433 struct dwarf2_section_info
*section
,
4434 struct dwarf2_section_info
*abbrev_section
,
4435 const gdb_byte
*info_ptr
,
4436 int is_debug_types_section
)
4438 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4439 bfd
*abfd
= get_section_bfd_owner (section
);
4441 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4443 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4445 /* If we're reading a type unit, skip over the signature and
4446 type_offset fields. */
4447 if (is_debug_types_section
)
4448 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4450 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4452 error_check_comp_unit_head (header
, section
, abbrev_section
);
4457 /* Read in the types comp unit header information from .debug_types entry at
4458 types_ptr. The result is a pointer to one past the end of the header. */
4460 static const gdb_byte
*
4461 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4462 struct dwarf2_section_info
*section
,
4463 struct dwarf2_section_info
*abbrev_section
,
4464 const gdb_byte
*info_ptr
,
4465 ULONGEST
*signature
,
4466 cu_offset
*type_offset_in_tu
)
4468 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4469 bfd
*abfd
= get_section_bfd_owner (section
);
4471 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4473 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4475 /* If we're reading a type unit, skip over the signature and
4476 type_offset fields. */
4477 if (signature
!= NULL
)
4478 *signature
= read_8_bytes (abfd
, info_ptr
);
4480 if (type_offset_in_tu
!= NULL
)
4481 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4482 header
->offset_size
);
4483 info_ptr
+= header
->offset_size
;
4485 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4487 error_check_comp_unit_head (header
, section
, abbrev_section
);
4492 /* Fetch the abbreviation table offset from a comp or type unit header. */
4495 read_abbrev_offset (struct dwarf2_section_info
*section
,
4498 bfd
*abfd
= get_section_bfd_owner (section
);
4499 const gdb_byte
*info_ptr
;
4500 unsigned int initial_length_size
, offset_size
;
4501 sect_offset abbrev_offset
;
4503 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4504 info_ptr
= section
->buffer
+ offset
.sect_off
;
4505 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4506 offset_size
= initial_length_size
== 4 ? 4 : 8;
4507 info_ptr
+= initial_length_size
+ 2 /*version*/;
4508 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4509 return abbrev_offset
;
4512 /* Allocate a new partial symtab for file named NAME and mark this new
4513 partial symtab as being an include of PST. */
4516 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4517 struct objfile
*objfile
)
4519 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4521 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4523 /* It shares objfile->objfile_obstack. */
4524 subpst
->dirname
= pst
->dirname
;
4527 subpst
->textlow
= 0;
4528 subpst
->texthigh
= 0;
4530 subpst
->dependencies
4531 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4532 subpst
->dependencies
[0] = pst
;
4533 subpst
->number_of_dependencies
= 1;
4535 subpst
->globals_offset
= 0;
4536 subpst
->n_global_syms
= 0;
4537 subpst
->statics_offset
= 0;
4538 subpst
->n_static_syms
= 0;
4539 subpst
->compunit_symtab
= NULL
;
4540 subpst
->read_symtab
= pst
->read_symtab
;
4543 /* No private part is necessary for include psymtabs. This property
4544 can be used to differentiate between such include psymtabs and
4545 the regular ones. */
4546 subpst
->read_symtab_private
= NULL
;
4549 /* Read the Line Number Program data and extract the list of files
4550 included by the source file represented by PST. Build an include
4551 partial symtab for each of these included files. */
4554 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4555 struct die_info
*die
,
4556 struct partial_symtab
*pst
)
4558 struct line_header
*lh
= NULL
;
4559 struct attribute
*attr
;
4561 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4563 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4565 return; /* No linetable, so no includes. */
4567 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4568 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4570 free_line_header (lh
);
4574 hash_signatured_type (const void *item
)
4576 const struct signatured_type
*sig_type
4577 = (const struct signatured_type
*) item
;
4579 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4580 return sig_type
->signature
;
4584 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4586 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4587 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4589 return lhs
->signature
== rhs
->signature
;
4592 /* Allocate a hash table for signatured types. */
4595 allocate_signatured_type_table (struct objfile
*objfile
)
4597 return htab_create_alloc_ex (41,
4598 hash_signatured_type
,
4601 &objfile
->objfile_obstack
,
4602 hashtab_obstack_allocate
,
4603 dummy_obstack_deallocate
);
4606 /* A helper function to add a signatured type CU to a table. */
4609 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4611 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4612 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4620 /* Create the hash table of all entries in the .debug_types
4621 (or .debug_types.dwo) section(s).
4622 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4623 otherwise it is NULL.
4625 The result is a pointer to the hash table or NULL if there are no types.
4627 Note: This function processes DWO files only, not DWP files. */
4630 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4631 VEC (dwarf2_section_info_def
) *types
)
4633 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4634 htab_t types_htab
= NULL
;
4636 struct dwarf2_section_info
*section
;
4637 struct dwarf2_section_info
*abbrev_section
;
4639 if (VEC_empty (dwarf2_section_info_def
, types
))
4642 abbrev_section
= (dwo_file
!= NULL
4643 ? &dwo_file
->sections
.abbrev
4644 : &dwarf2_per_objfile
->abbrev
);
4646 if (dwarf_read_debug
)
4647 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4648 dwo_file
? ".dwo" : "",
4649 get_section_file_name (abbrev_section
));
4652 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4656 const gdb_byte
*info_ptr
, *end_ptr
;
4658 dwarf2_read_section (objfile
, section
);
4659 info_ptr
= section
->buffer
;
4661 if (info_ptr
== NULL
)
4664 /* We can't set abfd until now because the section may be empty or
4665 not present, in which case the bfd is unknown. */
4666 abfd
= get_section_bfd_owner (section
);
4668 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4669 because we don't need to read any dies: the signature is in the
4672 end_ptr
= info_ptr
+ section
->size
;
4673 while (info_ptr
< end_ptr
)
4676 cu_offset type_offset_in_tu
;
4678 struct signatured_type
*sig_type
;
4679 struct dwo_unit
*dwo_tu
;
4681 const gdb_byte
*ptr
= info_ptr
;
4682 struct comp_unit_head header
;
4683 unsigned int length
;
4685 offset
.sect_off
= ptr
- section
->buffer
;
4687 /* We need to read the type's signature in order to build the hash
4688 table, but we don't need anything else just yet. */
4690 ptr
= read_and_check_type_unit_head (&header
, section
,
4691 abbrev_section
, ptr
,
4692 &signature
, &type_offset_in_tu
);
4694 length
= get_cu_length (&header
);
4696 /* Skip dummy type units. */
4697 if (ptr
>= info_ptr
+ length
4698 || peek_abbrev_code (abfd
, ptr
) == 0)
4704 if (types_htab
== NULL
)
4707 types_htab
= allocate_dwo_unit_table (objfile
);
4709 types_htab
= allocate_signatured_type_table (objfile
);
4715 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4717 dwo_tu
->dwo_file
= dwo_file
;
4718 dwo_tu
->signature
= signature
;
4719 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4720 dwo_tu
->section
= section
;
4721 dwo_tu
->offset
= offset
;
4722 dwo_tu
->length
= length
;
4726 /* N.B.: type_offset is not usable if this type uses a DWO file.
4727 The real type_offset is in the DWO file. */
4729 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4730 struct signatured_type
);
4731 sig_type
->signature
= signature
;
4732 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4733 sig_type
->per_cu
.objfile
= objfile
;
4734 sig_type
->per_cu
.is_debug_types
= 1;
4735 sig_type
->per_cu
.section
= section
;
4736 sig_type
->per_cu
.offset
= offset
;
4737 sig_type
->per_cu
.length
= length
;
4740 slot
= htab_find_slot (types_htab
,
4741 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4743 gdb_assert (slot
!= NULL
);
4746 sect_offset dup_offset
;
4750 const struct dwo_unit
*dup_tu
4751 = (const struct dwo_unit
*) *slot
;
4753 dup_offset
= dup_tu
->offset
;
4757 const struct signatured_type
*dup_tu
4758 = (const struct signatured_type
*) *slot
;
4760 dup_offset
= dup_tu
->per_cu
.offset
;
4763 complaint (&symfile_complaints
,
4764 _("debug type entry at offset 0x%x is duplicate to"
4765 " the entry at offset 0x%x, signature %s"),
4766 offset
.sect_off
, dup_offset
.sect_off
,
4767 hex_string (signature
));
4769 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4771 if (dwarf_read_debug
> 1)
4772 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4774 hex_string (signature
));
4783 /* Create the hash table of all entries in the .debug_types section,
4784 and initialize all_type_units.
4785 The result is zero if there is an error (e.g. missing .debug_types section),
4786 otherwise non-zero. */
4789 create_all_type_units (struct objfile
*objfile
)
4792 struct signatured_type
**iter
;
4794 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4795 if (types_htab
== NULL
)
4797 dwarf2_per_objfile
->signatured_types
= NULL
;
4801 dwarf2_per_objfile
->signatured_types
= types_htab
;
4803 dwarf2_per_objfile
->n_type_units
4804 = dwarf2_per_objfile
->n_allocated_type_units
4805 = htab_elements (types_htab
);
4806 dwarf2_per_objfile
->all_type_units
=
4807 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4808 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4809 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4810 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4811 == dwarf2_per_objfile
->n_type_units
);
4816 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4817 If SLOT is non-NULL, it is the entry to use in the hash table.
4818 Otherwise we find one. */
4820 static struct signatured_type
*
4821 add_type_unit (ULONGEST sig
, void **slot
)
4823 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4824 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4825 struct signatured_type
*sig_type
;
4827 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4829 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4831 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4832 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4833 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4834 dwarf2_per_objfile
->all_type_units
4835 = XRESIZEVEC (struct signatured_type
*,
4836 dwarf2_per_objfile
->all_type_units
,
4837 dwarf2_per_objfile
->n_allocated_type_units
);
4838 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4840 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4842 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4843 struct signatured_type
);
4844 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4845 sig_type
->signature
= sig
;
4846 sig_type
->per_cu
.is_debug_types
= 1;
4847 if (dwarf2_per_objfile
->using_index
)
4849 sig_type
->per_cu
.v
.quick
=
4850 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4851 struct dwarf2_per_cu_quick_data
);
4856 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4859 gdb_assert (*slot
== NULL
);
4861 /* The rest of sig_type must be filled in by the caller. */
4865 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4866 Fill in SIG_ENTRY with DWO_ENTRY. */
4869 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4870 struct signatured_type
*sig_entry
,
4871 struct dwo_unit
*dwo_entry
)
4873 /* Make sure we're not clobbering something we don't expect to. */
4874 gdb_assert (! sig_entry
->per_cu
.queued
);
4875 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4876 if (dwarf2_per_objfile
->using_index
)
4878 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4879 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4882 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4883 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4884 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4885 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4886 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4888 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4889 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4890 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4891 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4892 sig_entry
->per_cu
.objfile
= objfile
;
4893 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4894 sig_entry
->dwo_unit
= dwo_entry
;
4897 /* Subroutine of lookup_signatured_type.
4898 If we haven't read the TU yet, create the signatured_type data structure
4899 for a TU to be read in directly from a DWO file, bypassing the stub.
4900 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4901 using .gdb_index, then when reading a CU we want to stay in the DWO file
4902 containing that CU. Otherwise we could end up reading several other DWO
4903 files (due to comdat folding) to process the transitive closure of all the
4904 mentioned TUs, and that can be slow. The current DWO file will have every
4905 type signature that it needs.
4906 We only do this for .gdb_index because in the psymtab case we already have
4907 to read all the DWOs to build the type unit groups. */
4909 static struct signatured_type
*
4910 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4912 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4913 struct dwo_file
*dwo_file
;
4914 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4915 struct signatured_type find_sig_entry
, *sig_entry
;
4918 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4920 /* If TU skeletons have been removed then we may not have read in any
4922 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4924 dwarf2_per_objfile
->signatured_types
4925 = allocate_signatured_type_table (objfile
);
4928 /* We only ever need to read in one copy of a signatured type.
4929 Use the global signatured_types array to do our own comdat-folding
4930 of types. If this is the first time we're reading this TU, and
4931 the TU has an entry in .gdb_index, replace the recorded data from
4932 .gdb_index with this TU. */
4934 find_sig_entry
.signature
= sig
;
4935 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4936 &find_sig_entry
, INSERT
);
4937 sig_entry
= (struct signatured_type
*) *slot
;
4939 /* We can get here with the TU already read, *or* in the process of being
4940 read. Don't reassign the global entry to point to this DWO if that's
4941 the case. Also note that if the TU is already being read, it may not
4942 have come from a DWO, the program may be a mix of Fission-compiled
4943 code and non-Fission-compiled code. */
4945 /* Have we already tried to read this TU?
4946 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4947 needn't exist in the global table yet). */
4948 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4951 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4952 dwo_unit of the TU itself. */
4953 dwo_file
= cu
->dwo_unit
->dwo_file
;
4955 /* Ok, this is the first time we're reading this TU. */
4956 if (dwo_file
->tus
== NULL
)
4958 find_dwo_entry
.signature
= sig
;
4959 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
4960 if (dwo_entry
== NULL
)
4963 /* If the global table doesn't have an entry for this TU, add one. */
4964 if (sig_entry
== NULL
)
4965 sig_entry
= add_type_unit (sig
, slot
);
4967 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4968 sig_entry
->per_cu
.tu_read
= 1;
4972 /* Subroutine of lookup_signatured_type.
4973 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4974 then try the DWP file. If the TU stub (skeleton) has been removed then
4975 it won't be in .gdb_index. */
4977 static struct signatured_type
*
4978 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4980 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4981 struct dwp_file
*dwp_file
= get_dwp_file ();
4982 struct dwo_unit
*dwo_entry
;
4983 struct signatured_type find_sig_entry
, *sig_entry
;
4986 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4987 gdb_assert (dwp_file
!= NULL
);
4989 /* If TU skeletons have been removed then we may not have read in any
4991 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4993 dwarf2_per_objfile
->signatured_types
4994 = allocate_signatured_type_table (objfile
);
4997 find_sig_entry
.signature
= sig
;
4998 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4999 &find_sig_entry
, INSERT
);
5000 sig_entry
= (struct signatured_type
*) *slot
;
5002 /* Have we already tried to read this TU?
5003 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5004 needn't exist in the global table yet). */
5005 if (sig_entry
!= NULL
)
5008 if (dwp_file
->tus
== NULL
)
5010 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
5011 sig
, 1 /* is_debug_types */);
5012 if (dwo_entry
== NULL
)
5015 sig_entry
= add_type_unit (sig
, slot
);
5016 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5021 /* Lookup a signature based type for DW_FORM_ref_sig8.
5022 Returns NULL if signature SIG is not present in the table.
5023 It is up to the caller to complain about this. */
5025 static struct signatured_type
*
5026 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5029 && dwarf2_per_objfile
->using_index
)
5031 /* We're in a DWO/DWP file, and we're using .gdb_index.
5032 These cases require special processing. */
5033 if (get_dwp_file () == NULL
)
5034 return lookup_dwo_signatured_type (cu
, sig
);
5036 return lookup_dwp_signatured_type (cu
, sig
);
5040 struct signatured_type find_entry
, *entry
;
5042 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5044 find_entry
.signature
= sig
;
5045 entry
= ((struct signatured_type
*)
5046 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5051 /* Low level DIE reading support. */
5053 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5056 init_cu_die_reader (struct die_reader_specs
*reader
,
5057 struct dwarf2_cu
*cu
,
5058 struct dwarf2_section_info
*section
,
5059 struct dwo_file
*dwo_file
)
5061 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5062 reader
->abfd
= get_section_bfd_owner (section
);
5064 reader
->dwo_file
= dwo_file
;
5065 reader
->die_section
= section
;
5066 reader
->buffer
= section
->buffer
;
5067 reader
->buffer_end
= section
->buffer
+ section
->size
;
5068 reader
->comp_dir
= NULL
;
5071 /* Subroutine of init_cutu_and_read_dies to simplify it.
5072 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5073 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5076 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5077 from it to the DIE in the DWO. If NULL we are skipping the stub.
5078 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5079 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5080 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5081 STUB_COMP_DIR may be non-NULL.
5082 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5083 are filled in with the info of the DIE from the DWO file.
5084 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5085 provided an abbrev table to use.
5086 The result is non-zero if a valid (non-dummy) DIE was found. */
5089 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5090 struct dwo_unit
*dwo_unit
,
5091 int abbrev_table_provided
,
5092 struct die_info
*stub_comp_unit_die
,
5093 const char *stub_comp_dir
,
5094 struct die_reader_specs
*result_reader
,
5095 const gdb_byte
**result_info_ptr
,
5096 struct die_info
**result_comp_unit_die
,
5097 int *result_has_children
)
5099 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5100 struct dwarf2_cu
*cu
= this_cu
->cu
;
5101 struct dwarf2_section_info
*section
;
5103 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5104 ULONGEST signature
; /* Or dwo_id. */
5105 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5106 int i
,num_extra_attrs
;
5107 struct dwarf2_section_info
*dwo_abbrev_section
;
5108 struct attribute
*attr
;
5109 struct die_info
*comp_unit_die
;
5111 /* At most one of these may be provided. */
5112 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5114 /* These attributes aren't processed until later:
5115 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5116 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5117 referenced later. However, these attributes are found in the stub
5118 which we won't have later. In order to not impose this complication
5119 on the rest of the code, we read them here and copy them to the
5128 if (stub_comp_unit_die
!= NULL
)
5130 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5132 if (! this_cu
->is_debug_types
)
5133 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5134 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5135 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5136 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5137 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5139 /* There should be a DW_AT_addr_base attribute here (if needed).
5140 We need the value before we can process DW_FORM_GNU_addr_index. */
5142 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5144 cu
->addr_base
= DW_UNSND (attr
);
5146 /* There should be a DW_AT_ranges_base attribute here (if needed).
5147 We need the value before we can process DW_AT_ranges. */
5148 cu
->ranges_base
= 0;
5149 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5151 cu
->ranges_base
= DW_UNSND (attr
);
5153 else if (stub_comp_dir
!= NULL
)
5155 /* Reconstruct the comp_dir attribute to simplify the code below. */
5156 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5157 comp_dir
->name
= DW_AT_comp_dir
;
5158 comp_dir
->form
= DW_FORM_string
;
5159 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5160 DW_STRING (comp_dir
) = stub_comp_dir
;
5163 /* Set up for reading the DWO CU/TU. */
5164 cu
->dwo_unit
= dwo_unit
;
5165 section
= dwo_unit
->section
;
5166 dwarf2_read_section (objfile
, section
);
5167 abfd
= get_section_bfd_owner (section
);
5168 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5169 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5170 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5172 if (this_cu
->is_debug_types
)
5174 ULONGEST header_signature
;
5175 cu_offset type_offset_in_tu
;
5176 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5178 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5182 &type_offset_in_tu
);
5183 /* This is not an assert because it can be caused by bad debug info. */
5184 if (sig_type
->signature
!= header_signature
)
5186 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5187 " TU at offset 0x%x [in module %s]"),
5188 hex_string (sig_type
->signature
),
5189 hex_string (header_signature
),
5190 dwo_unit
->offset
.sect_off
,
5191 bfd_get_filename (abfd
));
5193 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5194 /* For DWOs coming from DWP files, we don't know the CU length
5195 nor the type's offset in the TU until now. */
5196 dwo_unit
->length
= get_cu_length (&cu
->header
);
5197 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5199 /* Establish the type offset that can be used to lookup the type.
5200 For DWO files, we don't know it until now. */
5201 sig_type
->type_offset_in_section
.sect_off
=
5202 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5206 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5209 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5210 /* For DWOs coming from DWP files, we don't know the CU length
5212 dwo_unit
->length
= get_cu_length (&cu
->header
);
5215 /* Replace the CU's original abbrev table with the DWO's.
5216 Reminder: We can't read the abbrev table until we've read the header. */
5217 if (abbrev_table_provided
)
5219 /* Don't free the provided abbrev table, the caller of
5220 init_cutu_and_read_dies owns it. */
5221 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5222 /* Ensure the DWO abbrev table gets freed. */
5223 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5227 dwarf2_free_abbrev_table (cu
);
5228 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5229 /* Leave any existing abbrev table cleanup as is. */
5232 /* Read in the die, but leave space to copy over the attributes
5233 from the stub. This has the benefit of simplifying the rest of
5234 the code - all the work to maintain the illusion of a single
5235 DW_TAG_{compile,type}_unit DIE is done here. */
5236 num_extra_attrs
= ((stmt_list
!= NULL
)
5240 + (comp_dir
!= NULL
));
5241 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5242 result_has_children
, num_extra_attrs
);
5244 /* Copy over the attributes from the stub to the DIE we just read in. */
5245 comp_unit_die
= *result_comp_unit_die
;
5246 i
= comp_unit_die
->num_attrs
;
5247 if (stmt_list
!= NULL
)
5248 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5250 comp_unit_die
->attrs
[i
++] = *low_pc
;
5251 if (high_pc
!= NULL
)
5252 comp_unit_die
->attrs
[i
++] = *high_pc
;
5254 comp_unit_die
->attrs
[i
++] = *ranges
;
5255 if (comp_dir
!= NULL
)
5256 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5257 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5259 if (dwarf_die_debug
)
5261 fprintf_unfiltered (gdb_stdlog
,
5262 "Read die from %s@0x%x of %s:\n",
5263 get_section_name (section
),
5264 (unsigned) (begin_info_ptr
- section
->buffer
),
5265 bfd_get_filename (abfd
));
5266 dump_die (comp_unit_die
, dwarf_die_debug
);
5269 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5270 TUs by skipping the stub and going directly to the entry in the DWO file.
5271 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5272 to get it via circuitous means. Blech. */
5273 if (comp_dir
!= NULL
)
5274 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5276 /* Skip dummy compilation units. */
5277 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5278 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5281 *result_info_ptr
= info_ptr
;
5285 /* Subroutine of init_cutu_and_read_dies to simplify it.
5286 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5287 Returns NULL if the specified DWO unit cannot be found. */
5289 static struct dwo_unit
*
5290 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5291 struct die_info
*comp_unit_die
)
5293 struct dwarf2_cu
*cu
= this_cu
->cu
;
5294 struct attribute
*attr
;
5296 struct dwo_unit
*dwo_unit
;
5297 const char *comp_dir
, *dwo_name
;
5299 gdb_assert (cu
!= NULL
);
5301 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5302 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5303 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5305 if (this_cu
->is_debug_types
)
5307 struct signatured_type
*sig_type
;
5309 /* Since this_cu is the first member of struct signatured_type,
5310 we can go from a pointer to one to a pointer to the other. */
5311 sig_type
= (struct signatured_type
*) this_cu
;
5312 signature
= sig_type
->signature
;
5313 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5317 struct attribute
*attr
;
5319 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5321 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5323 dwo_name
, objfile_name (this_cu
->objfile
));
5324 signature
= DW_UNSND (attr
);
5325 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5332 /* Subroutine of init_cutu_and_read_dies to simplify it.
5333 See it for a description of the parameters.
5334 Read a TU directly from a DWO file, bypassing the stub.
5336 Note: This function could be a little bit simpler if we shared cleanups
5337 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5338 to do, so we keep this function self-contained. Or we could move this
5339 into our caller, but it's complex enough already. */
5342 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5343 int use_existing_cu
, int keep
,
5344 die_reader_func_ftype
*die_reader_func
,
5347 struct dwarf2_cu
*cu
;
5348 struct signatured_type
*sig_type
;
5349 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5350 struct die_reader_specs reader
;
5351 const gdb_byte
*info_ptr
;
5352 struct die_info
*comp_unit_die
;
5355 /* Verify we can do the following downcast, and that we have the
5357 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5358 sig_type
= (struct signatured_type
*) this_cu
;
5359 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5361 cleanups
= make_cleanup (null_cleanup
, NULL
);
5363 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5365 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5367 /* There's no need to do the rereading_dwo_cu handling that
5368 init_cutu_and_read_dies does since we don't read the stub. */
5372 /* If !use_existing_cu, this_cu->cu must be NULL. */
5373 gdb_assert (this_cu
->cu
== NULL
);
5374 cu
= XNEW (struct dwarf2_cu
);
5375 init_one_comp_unit (cu
, this_cu
);
5376 /* If an error occurs while loading, release our storage. */
5377 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5380 /* A future optimization, if needed, would be to use an existing
5381 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5382 could share abbrev tables. */
5384 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5385 0 /* abbrev_table_provided */,
5386 NULL
/* stub_comp_unit_die */,
5387 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5389 &comp_unit_die
, &has_children
) == 0)
5392 do_cleanups (cleanups
);
5396 /* All the "real" work is done here. */
5397 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5399 /* This duplicates the code in init_cutu_and_read_dies,
5400 but the alternative is making the latter more complex.
5401 This function is only for the special case of using DWO files directly:
5402 no point in overly complicating the general case just to handle this. */
5403 if (free_cu_cleanup
!= NULL
)
5407 /* We've successfully allocated this compilation unit. Let our
5408 caller clean it up when finished with it. */
5409 discard_cleanups (free_cu_cleanup
);
5411 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5412 So we have to manually free the abbrev table. */
5413 dwarf2_free_abbrev_table (cu
);
5415 /* Link this CU into read_in_chain. */
5416 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5417 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5420 do_cleanups (free_cu_cleanup
);
5423 do_cleanups (cleanups
);
5426 /* Initialize a CU (or TU) and read its DIEs.
5427 If the CU defers to a DWO file, read the DWO file as well.
5429 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5430 Otherwise the table specified in the comp unit header is read in and used.
5431 This is an optimization for when we already have the abbrev table.
5433 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5434 Otherwise, a new CU is allocated with xmalloc.
5436 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5437 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5439 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5440 linker) then DIE_READER_FUNC will not get called. */
5443 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5444 struct abbrev_table
*abbrev_table
,
5445 int use_existing_cu
, int keep
,
5446 die_reader_func_ftype
*die_reader_func
,
5449 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5450 struct dwarf2_section_info
*section
= this_cu
->section
;
5451 bfd
*abfd
= get_section_bfd_owner (section
);
5452 struct dwarf2_cu
*cu
;
5453 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5454 struct die_reader_specs reader
;
5455 struct die_info
*comp_unit_die
;
5457 struct attribute
*attr
;
5458 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5459 struct signatured_type
*sig_type
= NULL
;
5460 struct dwarf2_section_info
*abbrev_section
;
5461 /* Non-zero if CU currently points to a DWO file and we need to
5462 reread it. When this happens we need to reread the skeleton die
5463 before we can reread the DWO file (this only applies to CUs, not TUs). */
5464 int rereading_dwo_cu
= 0;
5466 if (dwarf_die_debug
)
5467 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5468 this_cu
->is_debug_types
? "type" : "comp",
5469 this_cu
->offset
.sect_off
);
5471 if (use_existing_cu
)
5474 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5475 file (instead of going through the stub), short-circuit all of this. */
5476 if (this_cu
->reading_dwo_directly
)
5478 /* Narrow down the scope of possibilities to have to understand. */
5479 gdb_assert (this_cu
->is_debug_types
);
5480 gdb_assert (abbrev_table
== NULL
);
5481 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5482 die_reader_func
, data
);
5486 cleanups
= make_cleanup (null_cleanup
, NULL
);
5488 /* This is cheap if the section is already read in. */
5489 dwarf2_read_section (objfile
, section
);
5491 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5493 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5495 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5498 /* If this CU is from a DWO file we need to start over, we need to
5499 refetch the attributes from the skeleton CU.
5500 This could be optimized by retrieving those attributes from when we
5501 were here the first time: the previous comp_unit_die was stored in
5502 comp_unit_obstack. But there's no data yet that we need this
5504 if (cu
->dwo_unit
!= NULL
)
5505 rereading_dwo_cu
= 1;
5509 /* If !use_existing_cu, this_cu->cu must be NULL. */
5510 gdb_assert (this_cu
->cu
== NULL
);
5511 cu
= XNEW (struct dwarf2_cu
);
5512 init_one_comp_unit (cu
, this_cu
);
5513 /* If an error occurs while loading, release our storage. */
5514 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5517 /* Get the header. */
5518 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5520 /* We already have the header, there's no need to read it in again. */
5521 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5525 if (this_cu
->is_debug_types
)
5528 cu_offset type_offset_in_tu
;
5530 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5531 abbrev_section
, info_ptr
,
5533 &type_offset_in_tu
);
5535 /* Since per_cu is the first member of struct signatured_type,
5536 we can go from a pointer to one to a pointer to the other. */
5537 sig_type
= (struct signatured_type
*) this_cu
;
5538 gdb_assert (sig_type
->signature
== signature
);
5539 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5540 == type_offset_in_tu
.cu_off
);
5541 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5543 /* LENGTH has not been set yet for type units if we're
5544 using .gdb_index. */
5545 this_cu
->length
= get_cu_length (&cu
->header
);
5547 /* Establish the type offset that can be used to lookup the type. */
5548 sig_type
->type_offset_in_section
.sect_off
=
5549 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5553 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5557 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5558 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5562 /* Skip dummy compilation units. */
5563 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5564 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5566 do_cleanups (cleanups
);
5570 /* If we don't have them yet, read the abbrevs for this compilation unit.
5571 And if we need to read them now, make sure they're freed when we're
5572 done. Note that it's important that if the CU had an abbrev table
5573 on entry we don't free it when we're done: Somewhere up the call stack
5574 it may be in use. */
5575 if (abbrev_table
!= NULL
)
5577 gdb_assert (cu
->abbrev_table
== NULL
);
5578 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5579 == abbrev_table
->offset
.sect_off
);
5580 cu
->abbrev_table
= abbrev_table
;
5582 else if (cu
->abbrev_table
== NULL
)
5584 dwarf2_read_abbrevs (cu
, abbrev_section
);
5585 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5587 else if (rereading_dwo_cu
)
5589 dwarf2_free_abbrev_table (cu
);
5590 dwarf2_read_abbrevs (cu
, abbrev_section
);
5593 /* Read the top level CU/TU die. */
5594 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5595 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5597 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5599 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5600 DWO CU, that this test will fail (the attribute will not be present). */
5601 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5604 struct dwo_unit
*dwo_unit
;
5605 struct die_info
*dwo_comp_unit_die
;
5609 complaint (&symfile_complaints
,
5610 _("compilation unit with DW_AT_GNU_dwo_name"
5611 " has children (offset 0x%x) [in module %s]"),
5612 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5614 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5615 if (dwo_unit
!= NULL
)
5617 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5618 abbrev_table
!= NULL
,
5619 comp_unit_die
, NULL
,
5621 &dwo_comp_unit_die
, &has_children
) == 0)
5624 do_cleanups (cleanups
);
5627 comp_unit_die
= dwo_comp_unit_die
;
5631 /* Yikes, we couldn't find the rest of the DIE, we only have
5632 the stub. A complaint has already been logged. There's
5633 not much more we can do except pass on the stub DIE to
5634 die_reader_func. We don't want to throw an error on bad
5639 /* All of the above is setup for this call. Yikes. */
5640 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5642 /* Done, clean up. */
5643 if (free_cu_cleanup
!= NULL
)
5647 /* We've successfully allocated this compilation unit. Let our
5648 caller clean it up when finished with it. */
5649 discard_cleanups (free_cu_cleanup
);
5651 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5652 So we have to manually free the abbrev table. */
5653 dwarf2_free_abbrev_table (cu
);
5655 /* Link this CU into read_in_chain. */
5656 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5657 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5660 do_cleanups (free_cu_cleanup
);
5663 do_cleanups (cleanups
);
5666 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5667 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5668 to have already done the lookup to find the DWO file).
5670 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5671 THIS_CU->is_debug_types, but nothing else.
5673 We fill in THIS_CU->length.
5675 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5676 linker) then DIE_READER_FUNC will not get called.
5678 THIS_CU->cu is always freed when done.
5679 This is done in order to not leave THIS_CU->cu in a state where we have
5680 to care whether it refers to the "main" CU or the DWO CU. */
5683 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5684 struct dwo_file
*dwo_file
,
5685 die_reader_func_ftype
*die_reader_func
,
5688 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5689 struct dwarf2_section_info
*section
= this_cu
->section
;
5690 bfd
*abfd
= get_section_bfd_owner (section
);
5691 struct dwarf2_section_info
*abbrev_section
;
5692 struct dwarf2_cu cu
;
5693 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5694 struct die_reader_specs reader
;
5695 struct cleanup
*cleanups
;
5696 struct die_info
*comp_unit_die
;
5699 if (dwarf_die_debug
)
5700 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5701 this_cu
->is_debug_types
? "type" : "comp",
5702 this_cu
->offset
.sect_off
);
5704 gdb_assert (this_cu
->cu
== NULL
);
5706 abbrev_section
= (dwo_file
!= NULL
5707 ? &dwo_file
->sections
.abbrev
5708 : get_abbrev_section_for_cu (this_cu
));
5710 /* This is cheap if the section is already read in. */
5711 dwarf2_read_section (objfile
, section
);
5713 init_one_comp_unit (&cu
, this_cu
);
5715 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5717 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5718 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5719 abbrev_section
, info_ptr
,
5720 this_cu
->is_debug_types
);
5722 this_cu
->length
= get_cu_length (&cu
.header
);
5724 /* Skip dummy compilation units. */
5725 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5726 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5728 do_cleanups (cleanups
);
5732 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5733 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5735 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5736 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5738 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5740 do_cleanups (cleanups
);
5743 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5744 does not lookup the specified DWO file.
5745 This cannot be used to read DWO files.
5747 THIS_CU->cu is always freed when done.
5748 This is done in order to not leave THIS_CU->cu in a state where we have
5749 to care whether it refers to the "main" CU or the DWO CU.
5750 We can revisit this if the data shows there's a performance issue. */
5753 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5754 die_reader_func_ftype
*die_reader_func
,
5757 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5760 /* Type Unit Groups.
5762 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5763 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5764 so that all types coming from the same compilation (.o file) are grouped
5765 together. A future step could be to put the types in the same symtab as
5766 the CU the types ultimately came from. */
5769 hash_type_unit_group (const void *item
)
5771 const struct type_unit_group
*tu_group
5772 = (const struct type_unit_group
*) item
;
5774 return hash_stmt_list_entry (&tu_group
->hash
);
5778 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5780 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
5781 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
5783 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5786 /* Allocate a hash table for type unit groups. */
5789 allocate_type_unit_groups_table (void)
5791 return htab_create_alloc_ex (3,
5792 hash_type_unit_group
,
5795 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5796 hashtab_obstack_allocate
,
5797 dummy_obstack_deallocate
);
5800 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5801 partial symtabs. We combine several TUs per psymtab to not let the size
5802 of any one psymtab grow too big. */
5803 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5804 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5806 /* Helper routine for get_type_unit_group.
5807 Create the type_unit_group object used to hold one or more TUs. */
5809 static struct type_unit_group
*
5810 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5812 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5813 struct dwarf2_per_cu_data
*per_cu
;
5814 struct type_unit_group
*tu_group
;
5816 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5817 struct type_unit_group
);
5818 per_cu
= &tu_group
->per_cu
;
5819 per_cu
->objfile
= objfile
;
5821 if (dwarf2_per_objfile
->using_index
)
5823 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5824 struct dwarf2_per_cu_quick_data
);
5828 unsigned int line_offset
= line_offset_struct
.sect_off
;
5829 struct partial_symtab
*pst
;
5832 /* Give the symtab a useful name for debug purposes. */
5833 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5834 name
= xstrprintf ("<type_units_%d>",
5835 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5837 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5839 pst
= create_partial_symtab (per_cu
, name
);
5845 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5846 tu_group
->hash
.line_offset
= line_offset_struct
;
5851 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5852 STMT_LIST is a DW_AT_stmt_list attribute. */
5854 static struct type_unit_group
*
5855 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5857 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5858 struct type_unit_group
*tu_group
;
5860 unsigned int line_offset
;
5861 struct type_unit_group type_unit_group_for_lookup
;
5863 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5865 dwarf2_per_objfile
->type_unit_groups
=
5866 allocate_type_unit_groups_table ();
5869 /* Do we need to create a new group, or can we use an existing one? */
5873 line_offset
= DW_UNSND (stmt_list
);
5874 ++tu_stats
->nr_symtab_sharers
;
5878 /* Ugh, no stmt_list. Rare, but we have to handle it.
5879 We can do various things here like create one group per TU or
5880 spread them over multiple groups to split up the expansion work.
5881 To avoid worst case scenarios (too many groups or too large groups)
5882 we, umm, group them in bunches. */
5883 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5884 | (tu_stats
->nr_stmt_less_type_units
5885 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5886 ++tu_stats
->nr_stmt_less_type_units
;
5889 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5890 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5891 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5892 &type_unit_group_for_lookup
, INSERT
);
5895 tu_group
= (struct type_unit_group
*) *slot
;
5896 gdb_assert (tu_group
!= NULL
);
5900 sect_offset line_offset_struct
;
5902 line_offset_struct
.sect_off
= line_offset
;
5903 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5905 ++tu_stats
->nr_symtabs
;
5911 /* Partial symbol tables. */
5913 /* Create a psymtab named NAME and assign it to PER_CU.
5915 The caller must fill in the following details:
5916 dirname, textlow, texthigh. */
5918 static struct partial_symtab
*
5919 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5921 struct objfile
*objfile
= per_cu
->objfile
;
5922 struct partial_symtab
*pst
;
5924 pst
= start_psymtab_common (objfile
, name
, 0,
5925 objfile
->global_psymbols
.next
,
5926 objfile
->static_psymbols
.next
);
5928 pst
->psymtabs_addrmap_supported
= 1;
5930 /* This is the glue that links PST into GDB's symbol API. */
5931 pst
->read_symtab_private
= per_cu
;
5932 pst
->read_symtab
= dwarf2_read_symtab
;
5933 per_cu
->v
.psymtab
= pst
;
5938 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5941 struct process_psymtab_comp_unit_data
5943 /* True if we are reading a DW_TAG_partial_unit. */
5945 int want_partial_unit
;
5947 /* The "pretend" language that is used if the CU doesn't declare a
5950 enum language pretend_language
;
5953 /* die_reader_func for process_psymtab_comp_unit. */
5956 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5957 const gdb_byte
*info_ptr
,
5958 struct die_info
*comp_unit_die
,
5962 struct dwarf2_cu
*cu
= reader
->cu
;
5963 struct objfile
*objfile
= cu
->objfile
;
5964 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5965 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5967 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5968 struct partial_symtab
*pst
;
5969 enum pc_bounds_kind cu_bounds_kind
;
5970 const char *filename
;
5971 struct process_psymtab_comp_unit_data
*info
5972 = (struct process_psymtab_comp_unit_data
*) data
;
5974 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5977 gdb_assert (! per_cu
->is_debug_types
);
5979 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5981 cu
->list_in_scope
= &file_symbols
;
5983 /* Allocate a new partial symbol table structure. */
5984 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
5985 if (filename
== NULL
)
5988 pst
= create_partial_symtab (per_cu
, filename
);
5990 /* This must be done before calling dwarf2_build_include_psymtabs. */
5991 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5993 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5995 dwarf2_find_base_address (comp_unit_die
, cu
);
5997 /* Possibly set the default values of LOWPC and HIGHPC from
5999 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
6000 &best_highpc
, cu
, pst
);
6001 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
6002 /* Store the contiguous range if it is not empty; it can be empty for
6003 CUs with no code. */
6004 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6005 gdbarch_adjust_dwarf2_addr (gdbarch
,
6006 best_lowpc
+ baseaddr
),
6007 gdbarch_adjust_dwarf2_addr (gdbarch
,
6008 best_highpc
+ baseaddr
) - 1,
6011 /* Check if comp unit has_children.
6012 If so, read the rest of the partial symbols from this comp unit.
6013 If not, there's no more debug_info for this comp unit. */
6016 struct partial_die_info
*first_die
;
6017 CORE_ADDR lowpc
, highpc
;
6019 lowpc
= ((CORE_ADDR
) -1);
6020 highpc
= ((CORE_ADDR
) 0);
6022 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6024 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6025 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
6027 /* If we didn't find a lowpc, set it to highpc to avoid
6028 complaints from `maint check'. */
6029 if (lowpc
== ((CORE_ADDR
) -1))
6032 /* If the compilation unit didn't have an explicit address range,
6033 then use the information extracted from its child dies. */
6034 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
6037 best_highpc
= highpc
;
6040 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6041 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6043 end_psymtab_common (objfile
, pst
);
6045 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6048 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6049 struct dwarf2_per_cu_data
*iter
;
6051 /* Fill in 'dependencies' here; we fill in 'users' in a
6053 pst
->number_of_dependencies
= len
;
6055 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6057 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6060 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6062 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6065 /* Get the list of files included in the current compilation unit,
6066 and build a psymtab for each of them. */
6067 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6069 if (dwarf_read_debug
)
6071 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6073 fprintf_unfiltered (gdb_stdlog
,
6074 "Psymtab for %s unit @0x%x: %s - %s"
6075 ", %d global, %d static syms\n",
6076 per_cu
->is_debug_types
? "type" : "comp",
6077 per_cu
->offset
.sect_off
,
6078 paddress (gdbarch
, pst
->textlow
),
6079 paddress (gdbarch
, pst
->texthigh
),
6080 pst
->n_global_syms
, pst
->n_static_syms
);
6084 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6085 Process compilation unit THIS_CU for a psymtab. */
6088 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6089 int want_partial_unit
,
6090 enum language pretend_language
)
6092 struct process_psymtab_comp_unit_data info
;
6094 /* If this compilation unit was already read in, free the
6095 cached copy in order to read it in again. This is
6096 necessary because we skipped some symbols when we first
6097 read in the compilation unit (see load_partial_dies).
6098 This problem could be avoided, but the benefit is unclear. */
6099 if (this_cu
->cu
!= NULL
)
6100 free_one_cached_comp_unit (this_cu
);
6102 gdb_assert (! this_cu
->is_debug_types
);
6103 info
.want_partial_unit
= want_partial_unit
;
6104 info
.pretend_language
= pretend_language
;
6105 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6106 process_psymtab_comp_unit_reader
,
6109 /* Age out any secondary CUs. */
6110 age_cached_comp_units ();
6113 /* Reader function for build_type_psymtabs. */
6116 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6117 const gdb_byte
*info_ptr
,
6118 struct die_info
*type_unit_die
,
6122 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6123 struct dwarf2_cu
*cu
= reader
->cu
;
6124 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6125 struct signatured_type
*sig_type
;
6126 struct type_unit_group
*tu_group
;
6127 struct attribute
*attr
;
6128 struct partial_die_info
*first_die
;
6129 CORE_ADDR lowpc
, highpc
;
6130 struct partial_symtab
*pst
;
6132 gdb_assert (data
== NULL
);
6133 gdb_assert (per_cu
->is_debug_types
);
6134 sig_type
= (struct signatured_type
*) per_cu
;
6139 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6140 tu_group
= get_type_unit_group (cu
, attr
);
6142 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6144 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6145 cu
->list_in_scope
= &file_symbols
;
6146 pst
= create_partial_symtab (per_cu
, "");
6149 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6151 lowpc
= (CORE_ADDR
) -1;
6152 highpc
= (CORE_ADDR
) 0;
6153 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6155 end_psymtab_common (objfile
, pst
);
6158 /* Struct used to sort TUs by their abbreviation table offset. */
6160 struct tu_abbrev_offset
6162 struct signatured_type
*sig_type
;
6163 sect_offset abbrev_offset
;
6166 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6169 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6171 const struct tu_abbrev_offset
* const *a
6172 = (const struct tu_abbrev_offset
* const*) ap
;
6173 const struct tu_abbrev_offset
* const *b
6174 = (const struct tu_abbrev_offset
* const*) bp
;
6175 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6176 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6178 return (aoff
> boff
) - (aoff
< boff
);
6181 /* Efficiently read all the type units.
6182 This does the bulk of the work for build_type_psymtabs.
6184 The efficiency is because we sort TUs by the abbrev table they use and
6185 only read each abbrev table once. In one program there are 200K TUs
6186 sharing 8K abbrev tables.
6188 The main purpose of this function is to support building the
6189 dwarf2_per_objfile->type_unit_groups table.
6190 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6191 can collapse the search space by grouping them by stmt_list.
6192 The savings can be significant, in the same program from above the 200K TUs
6193 share 8K stmt_list tables.
6195 FUNC is expected to call get_type_unit_group, which will create the
6196 struct type_unit_group if necessary and add it to
6197 dwarf2_per_objfile->type_unit_groups. */
6200 build_type_psymtabs_1 (void)
6202 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6203 struct cleanup
*cleanups
;
6204 struct abbrev_table
*abbrev_table
;
6205 sect_offset abbrev_offset
;
6206 struct tu_abbrev_offset
*sorted_by_abbrev
;
6209 /* It's up to the caller to not call us multiple times. */
6210 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6212 if (dwarf2_per_objfile
->n_type_units
== 0)
6215 /* TUs typically share abbrev tables, and there can be way more TUs than
6216 abbrev tables. Sort by abbrev table to reduce the number of times we
6217 read each abbrev table in.
6218 Alternatives are to punt or to maintain a cache of abbrev tables.
6219 This is simpler and efficient enough for now.
6221 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6222 symtab to use). Typically TUs with the same abbrev offset have the same
6223 stmt_list value too so in practice this should work well.
6225 The basic algorithm here is:
6227 sort TUs by abbrev table
6228 for each TU with same abbrev table:
6229 read abbrev table if first user
6230 read TU top level DIE
6231 [IWBN if DWO skeletons had DW_AT_stmt_list]
6234 if (dwarf_read_debug
)
6235 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6237 /* Sort in a separate table to maintain the order of all_type_units
6238 for .gdb_index: TU indices directly index all_type_units. */
6239 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6240 dwarf2_per_objfile
->n_type_units
);
6241 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6243 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6245 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6246 sorted_by_abbrev
[i
].abbrev_offset
=
6247 read_abbrev_offset (sig_type
->per_cu
.section
,
6248 sig_type
->per_cu
.offset
);
6250 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6251 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6252 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6254 abbrev_offset
.sect_off
= ~(unsigned) 0;
6255 abbrev_table
= NULL
;
6256 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6258 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6260 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6262 /* Switch to the next abbrev table if necessary. */
6263 if (abbrev_table
== NULL
6264 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6266 if (abbrev_table
!= NULL
)
6268 abbrev_table_free (abbrev_table
);
6269 /* Reset to NULL in case abbrev_table_read_table throws
6270 an error: abbrev_table_free_cleanup will get called. */
6271 abbrev_table
= NULL
;
6273 abbrev_offset
= tu
->abbrev_offset
;
6275 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6277 ++tu_stats
->nr_uniq_abbrev_tables
;
6280 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6281 build_type_psymtabs_reader
, NULL
);
6284 do_cleanups (cleanups
);
6287 /* Print collected type unit statistics. */
6290 print_tu_stats (void)
6292 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6294 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6295 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6296 dwarf2_per_objfile
->n_type_units
);
6297 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6298 tu_stats
->nr_uniq_abbrev_tables
);
6299 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6300 tu_stats
->nr_symtabs
);
6301 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6302 tu_stats
->nr_symtab_sharers
);
6303 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6304 tu_stats
->nr_stmt_less_type_units
);
6305 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6306 tu_stats
->nr_all_type_units_reallocs
);
6309 /* Traversal function for build_type_psymtabs. */
6312 build_type_psymtab_dependencies (void **slot
, void *info
)
6314 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6315 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6316 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6317 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6318 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6319 struct signatured_type
*iter
;
6322 gdb_assert (len
> 0);
6323 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6325 pst
->number_of_dependencies
= len
;
6327 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6329 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6332 gdb_assert (iter
->per_cu
.is_debug_types
);
6333 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6334 iter
->type_unit_group
= tu_group
;
6337 VEC_free (sig_type_ptr
, tu_group
->tus
);
6342 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6343 Build partial symbol tables for the .debug_types comp-units. */
6346 build_type_psymtabs (struct objfile
*objfile
)
6348 if (! create_all_type_units (objfile
))
6351 build_type_psymtabs_1 ();
6354 /* Traversal function for process_skeletonless_type_unit.
6355 Read a TU in a DWO file and build partial symbols for it. */
6358 process_skeletonless_type_unit (void **slot
, void *info
)
6360 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6361 struct objfile
*objfile
= (struct objfile
*) info
;
6362 struct signatured_type find_entry
, *entry
;
6364 /* If this TU doesn't exist in the global table, add it and read it in. */
6366 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6368 dwarf2_per_objfile
->signatured_types
6369 = allocate_signatured_type_table (objfile
);
6372 find_entry
.signature
= dwo_unit
->signature
;
6373 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6375 /* If we've already seen this type there's nothing to do. What's happening
6376 is we're doing our own version of comdat-folding here. */
6380 /* This does the job that create_all_type_units would have done for
6382 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6383 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6386 /* This does the job that build_type_psymtabs_1 would have done. */
6387 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6388 build_type_psymtabs_reader
, NULL
);
6393 /* Traversal function for process_skeletonless_type_units. */
6396 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6398 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6400 if (dwo_file
->tus
!= NULL
)
6402 htab_traverse_noresize (dwo_file
->tus
,
6403 process_skeletonless_type_unit
, info
);
6409 /* Scan all TUs of DWO files, verifying we've processed them.
6410 This is needed in case a TU was emitted without its skeleton.
6411 Note: This can't be done until we know what all the DWO files are. */
6414 process_skeletonless_type_units (struct objfile
*objfile
)
6416 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6417 if (get_dwp_file () == NULL
6418 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6420 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6421 process_dwo_file_for_skeletonless_type_units
,
6426 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6429 psymtabs_addrmap_cleanup (void *o
)
6431 struct objfile
*objfile
= (struct objfile
*) o
;
6433 objfile
->psymtabs_addrmap
= NULL
;
6436 /* Compute the 'user' field for each psymtab in OBJFILE. */
6439 set_partial_user (struct objfile
*objfile
)
6443 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6445 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6446 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6452 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6454 /* Set the 'user' field only if it is not already set. */
6455 if (pst
->dependencies
[j
]->user
== NULL
)
6456 pst
->dependencies
[j
]->user
= pst
;
6461 /* Build the partial symbol table by doing a quick pass through the
6462 .debug_info and .debug_abbrev sections. */
6465 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6467 struct cleanup
*back_to
, *addrmap_cleanup
;
6468 struct obstack temp_obstack
;
6471 if (dwarf_read_debug
)
6473 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6474 objfile_name (objfile
));
6477 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6479 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6481 /* Any cached compilation units will be linked by the per-objfile
6482 read_in_chain. Make sure to free them when we're done. */
6483 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6485 build_type_psymtabs (objfile
);
6487 create_all_comp_units (objfile
);
6489 /* Create a temporary address map on a temporary obstack. We later
6490 copy this to the final obstack. */
6491 obstack_init (&temp_obstack
);
6492 make_cleanup_obstack_free (&temp_obstack
);
6493 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6494 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6496 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6498 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6500 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6503 /* This has to wait until we read the CUs, we need the list of DWOs. */
6504 process_skeletonless_type_units (objfile
);
6506 /* Now that all TUs have been processed we can fill in the dependencies. */
6507 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6509 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6510 build_type_psymtab_dependencies
, NULL
);
6513 if (dwarf_read_debug
)
6516 set_partial_user (objfile
);
6518 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6519 &objfile
->objfile_obstack
);
6520 discard_cleanups (addrmap_cleanup
);
6522 do_cleanups (back_to
);
6524 if (dwarf_read_debug
)
6525 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6526 objfile_name (objfile
));
6529 /* die_reader_func for load_partial_comp_unit. */
6532 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6533 const gdb_byte
*info_ptr
,
6534 struct die_info
*comp_unit_die
,
6538 struct dwarf2_cu
*cu
= reader
->cu
;
6540 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6542 /* Check if comp unit has_children.
6543 If so, read the rest of the partial symbols from this comp unit.
6544 If not, there's no more debug_info for this comp unit. */
6546 load_partial_dies (reader
, info_ptr
, 0);
6549 /* Load the partial DIEs for a secondary CU into memory.
6550 This is also used when rereading a primary CU with load_all_dies. */
6553 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6555 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6556 load_partial_comp_unit_reader
, NULL
);
6560 read_comp_units_from_section (struct objfile
*objfile
,
6561 struct dwarf2_section_info
*section
,
6562 unsigned int is_dwz
,
6565 struct dwarf2_per_cu_data
***all_comp_units
)
6567 const gdb_byte
*info_ptr
;
6568 bfd
*abfd
= get_section_bfd_owner (section
);
6570 if (dwarf_read_debug
)
6571 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6572 get_section_name (section
),
6573 get_section_file_name (section
));
6575 dwarf2_read_section (objfile
, section
);
6577 info_ptr
= section
->buffer
;
6579 while (info_ptr
< section
->buffer
+ section
->size
)
6581 unsigned int length
, initial_length_size
;
6582 struct dwarf2_per_cu_data
*this_cu
;
6585 offset
.sect_off
= info_ptr
- section
->buffer
;
6587 /* Read just enough information to find out where the next
6588 compilation unit is. */
6589 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6591 /* Save the compilation unit for later lookup. */
6592 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6593 memset (this_cu
, 0, sizeof (*this_cu
));
6594 this_cu
->offset
= offset
;
6595 this_cu
->length
= length
+ initial_length_size
;
6596 this_cu
->is_dwz
= is_dwz
;
6597 this_cu
->objfile
= objfile
;
6598 this_cu
->section
= section
;
6600 if (*n_comp_units
== *n_allocated
)
6603 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6604 *all_comp_units
, *n_allocated
);
6606 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6609 info_ptr
= info_ptr
+ this_cu
->length
;
6613 /* Create a list of all compilation units in OBJFILE.
6614 This is only done for -readnow and building partial symtabs. */
6617 create_all_comp_units (struct objfile
*objfile
)
6621 struct dwarf2_per_cu_data
**all_comp_units
;
6622 struct dwz_file
*dwz
;
6626 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6628 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6629 &n_allocated
, &n_comp_units
, &all_comp_units
);
6631 dwz
= dwarf2_get_dwz_file ();
6633 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6634 &n_allocated
, &n_comp_units
,
6637 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6638 struct dwarf2_per_cu_data
*,
6640 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6641 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6642 xfree (all_comp_units
);
6643 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6646 /* Process all loaded DIEs for compilation unit CU, starting at
6647 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6648 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6649 DW_AT_ranges). See the comments of add_partial_subprogram on how
6650 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6653 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6654 CORE_ADDR
*highpc
, int set_addrmap
,
6655 struct dwarf2_cu
*cu
)
6657 struct partial_die_info
*pdi
;
6659 /* Now, march along the PDI's, descending into ones which have
6660 interesting children but skipping the children of the other ones,
6661 until we reach the end of the compilation unit. */
6667 fixup_partial_die (pdi
, cu
);
6669 /* Anonymous namespaces or modules have no name but have interesting
6670 children, so we need to look at them. Ditto for anonymous
6673 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6674 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6675 || pdi
->tag
== DW_TAG_imported_unit
)
6679 case DW_TAG_subprogram
:
6680 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6682 case DW_TAG_constant
:
6683 case DW_TAG_variable
:
6684 case DW_TAG_typedef
:
6685 case DW_TAG_union_type
:
6686 if (!pdi
->is_declaration
)
6688 add_partial_symbol (pdi
, cu
);
6691 case DW_TAG_class_type
:
6692 case DW_TAG_interface_type
:
6693 case DW_TAG_structure_type
:
6694 if (!pdi
->is_declaration
)
6696 add_partial_symbol (pdi
, cu
);
6698 if (cu
->language
== language_rust
&& pdi
->has_children
)
6699 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
6702 case DW_TAG_enumeration_type
:
6703 if (!pdi
->is_declaration
)
6704 add_partial_enumeration (pdi
, cu
);
6706 case DW_TAG_base_type
:
6707 case DW_TAG_subrange_type
:
6708 /* File scope base type definitions are added to the partial
6710 add_partial_symbol (pdi
, cu
);
6712 case DW_TAG_namespace
:
6713 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6716 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6718 case DW_TAG_imported_unit
:
6720 struct dwarf2_per_cu_data
*per_cu
;
6722 /* For now we don't handle imported units in type units. */
6723 if (cu
->per_cu
->is_debug_types
)
6725 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6726 " supported in type units [in module %s]"),
6727 objfile_name (cu
->objfile
));
6730 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6734 /* Go read the partial unit, if needed. */
6735 if (per_cu
->v
.psymtab
== NULL
)
6736 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6738 VEC_safe_push (dwarf2_per_cu_ptr
,
6739 cu
->per_cu
->imported_symtabs
, per_cu
);
6742 case DW_TAG_imported_declaration
:
6743 add_partial_symbol (pdi
, cu
);
6750 /* If the die has a sibling, skip to the sibling. */
6752 pdi
= pdi
->die_sibling
;
6756 /* Functions used to compute the fully scoped name of a partial DIE.
6758 Normally, this is simple. For C++, the parent DIE's fully scoped
6759 name is concatenated with "::" and the partial DIE's name. For
6760 Java, the same thing occurs except that "." is used instead of "::".
6761 Enumerators are an exception; they use the scope of their parent
6762 enumeration type, i.e. the name of the enumeration type is not
6763 prepended to the enumerator.
6765 There are two complexities. One is DW_AT_specification; in this
6766 case "parent" means the parent of the target of the specification,
6767 instead of the direct parent of the DIE. The other is compilers
6768 which do not emit DW_TAG_namespace; in this case we try to guess
6769 the fully qualified name of structure types from their members'
6770 linkage names. This must be done using the DIE's children rather
6771 than the children of any DW_AT_specification target. We only need
6772 to do this for structures at the top level, i.e. if the target of
6773 any DW_AT_specification (if any; otherwise the DIE itself) does not
6776 /* Compute the scope prefix associated with PDI's parent, in
6777 compilation unit CU. The result will be allocated on CU's
6778 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6779 field. NULL is returned if no prefix is necessary. */
6781 partial_die_parent_scope (struct partial_die_info
*pdi
,
6782 struct dwarf2_cu
*cu
)
6784 const char *grandparent_scope
;
6785 struct partial_die_info
*parent
, *real_pdi
;
6787 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6788 then this means the parent of the specification DIE. */
6791 while (real_pdi
->has_specification
)
6792 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6793 real_pdi
->spec_is_dwz
, cu
);
6795 parent
= real_pdi
->die_parent
;
6799 if (parent
->scope_set
)
6800 return parent
->scope
;
6802 fixup_partial_die (parent
, cu
);
6804 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6806 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6807 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6808 Work around this problem here. */
6809 if (cu
->language
== language_cplus
6810 && parent
->tag
== DW_TAG_namespace
6811 && strcmp (parent
->name
, "::") == 0
6812 && grandparent_scope
== NULL
)
6814 parent
->scope
= NULL
;
6815 parent
->scope_set
= 1;
6819 if (pdi
->tag
== DW_TAG_enumerator
)
6820 /* Enumerators should not get the name of the enumeration as a prefix. */
6821 parent
->scope
= grandparent_scope
;
6822 else if (parent
->tag
== DW_TAG_namespace
6823 || parent
->tag
== DW_TAG_module
6824 || parent
->tag
== DW_TAG_structure_type
6825 || parent
->tag
== DW_TAG_class_type
6826 || parent
->tag
== DW_TAG_interface_type
6827 || parent
->tag
== DW_TAG_union_type
6828 || parent
->tag
== DW_TAG_enumeration_type
)
6830 if (grandparent_scope
== NULL
)
6831 parent
->scope
= parent
->name
;
6833 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6835 parent
->name
, 0, cu
);
6839 /* FIXME drow/2004-04-01: What should we be doing with
6840 function-local names? For partial symbols, we should probably be
6842 complaint (&symfile_complaints
,
6843 _("unhandled containing DIE tag %d for DIE at %d"),
6844 parent
->tag
, pdi
->offset
.sect_off
);
6845 parent
->scope
= grandparent_scope
;
6848 parent
->scope_set
= 1;
6849 return parent
->scope
;
6852 /* Return the fully scoped name associated with PDI, from compilation unit
6853 CU. The result will be allocated with malloc. */
6856 partial_die_full_name (struct partial_die_info
*pdi
,
6857 struct dwarf2_cu
*cu
)
6859 const char *parent_scope
;
6861 /* If this is a template instantiation, we can not work out the
6862 template arguments from partial DIEs. So, unfortunately, we have
6863 to go through the full DIEs. At least any work we do building
6864 types here will be reused if full symbols are loaded later. */
6865 if (pdi
->has_template_arguments
)
6867 fixup_partial_die (pdi
, cu
);
6869 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6871 struct die_info
*die
;
6872 struct attribute attr
;
6873 struct dwarf2_cu
*ref_cu
= cu
;
6875 /* DW_FORM_ref_addr is using section offset. */
6876 attr
.name
= (enum dwarf_attribute
) 0;
6877 attr
.form
= DW_FORM_ref_addr
;
6878 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6879 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6881 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6885 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6886 if (parent_scope
== NULL
)
6889 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6893 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6895 struct objfile
*objfile
= cu
->objfile
;
6896 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6898 const char *actual_name
= NULL
;
6900 char *built_actual_name
;
6902 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6904 built_actual_name
= partial_die_full_name (pdi
, cu
);
6905 if (built_actual_name
!= NULL
)
6906 actual_name
= built_actual_name
;
6908 if (actual_name
== NULL
)
6909 actual_name
= pdi
->name
;
6913 case DW_TAG_subprogram
:
6914 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6915 if (pdi
->is_external
|| cu
->language
== language_ada
)
6917 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6918 of the global scope. But in Ada, we want to be able to access
6919 nested procedures globally. So all Ada subprograms are stored
6920 in the global scope. */
6921 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6922 built_actual_name
!= NULL
,
6923 VAR_DOMAIN
, LOC_BLOCK
,
6924 &objfile
->global_psymbols
,
6925 addr
, cu
->language
, objfile
);
6929 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6930 built_actual_name
!= NULL
,
6931 VAR_DOMAIN
, LOC_BLOCK
,
6932 &objfile
->static_psymbols
,
6933 addr
, cu
->language
, objfile
);
6936 case DW_TAG_constant
:
6938 struct psymbol_allocation_list
*list
;
6940 if (pdi
->is_external
)
6941 list
= &objfile
->global_psymbols
;
6943 list
= &objfile
->static_psymbols
;
6944 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6945 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6946 list
, 0, cu
->language
, objfile
);
6949 case DW_TAG_variable
:
6951 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6955 && !dwarf2_per_objfile
->has_section_at_zero
)
6957 /* A global or static variable may also have been stripped
6958 out by the linker if unused, in which case its address
6959 will be nullified; do not add such variables into partial
6960 symbol table then. */
6962 else if (pdi
->is_external
)
6965 Don't enter into the minimal symbol tables as there is
6966 a minimal symbol table entry from the ELF symbols already.
6967 Enter into partial symbol table if it has a location
6968 descriptor or a type.
6969 If the location descriptor is missing, new_symbol will create
6970 a LOC_UNRESOLVED symbol, the address of the variable will then
6971 be determined from the minimal symbol table whenever the variable
6973 The address for the partial symbol table entry is not
6974 used by GDB, but it comes in handy for debugging partial symbol
6977 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6978 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6979 built_actual_name
!= NULL
,
6980 VAR_DOMAIN
, LOC_STATIC
,
6981 &objfile
->global_psymbols
,
6983 cu
->language
, objfile
);
6987 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6989 /* Static Variable. Skip symbols whose value we cannot know (those
6990 without location descriptors or constant values). */
6991 if (!has_loc
&& !pdi
->has_const_value
)
6993 xfree (built_actual_name
);
6997 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6998 built_actual_name
!= NULL
,
6999 VAR_DOMAIN
, LOC_STATIC
,
7000 &objfile
->static_psymbols
,
7001 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
7002 cu
->language
, objfile
);
7005 case DW_TAG_typedef
:
7006 case DW_TAG_base_type
:
7007 case DW_TAG_subrange_type
:
7008 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7009 built_actual_name
!= NULL
,
7010 VAR_DOMAIN
, LOC_TYPEDEF
,
7011 &objfile
->static_psymbols
,
7012 0, cu
->language
, objfile
);
7014 case DW_TAG_imported_declaration
:
7015 case DW_TAG_namespace
:
7016 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7017 built_actual_name
!= NULL
,
7018 VAR_DOMAIN
, LOC_TYPEDEF
,
7019 &objfile
->global_psymbols
,
7020 0, cu
->language
, objfile
);
7023 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7024 built_actual_name
!= NULL
,
7025 MODULE_DOMAIN
, LOC_TYPEDEF
,
7026 &objfile
->global_psymbols
,
7027 0, cu
->language
, objfile
);
7029 case DW_TAG_class_type
:
7030 case DW_TAG_interface_type
:
7031 case DW_TAG_structure_type
:
7032 case DW_TAG_union_type
:
7033 case DW_TAG_enumeration_type
:
7034 /* Skip external references. The DWARF standard says in the section
7035 about "Structure, Union, and Class Type Entries": "An incomplete
7036 structure, union or class type is represented by a structure,
7037 union or class entry that does not have a byte size attribute
7038 and that has a DW_AT_declaration attribute." */
7039 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7041 xfree (built_actual_name
);
7045 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7046 static vs. global. */
7047 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7048 built_actual_name
!= NULL
,
7049 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7050 (cu
->language
== language_cplus
7051 || cu
->language
== language_java
)
7052 ? &objfile
->global_psymbols
7053 : &objfile
->static_psymbols
,
7054 0, cu
->language
, objfile
);
7057 case DW_TAG_enumerator
:
7058 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7059 built_actual_name
!= NULL
,
7060 VAR_DOMAIN
, LOC_CONST
,
7061 (cu
->language
== language_cplus
7062 || cu
->language
== language_java
)
7063 ? &objfile
->global_psymbols
7064 : &objfile
->static_psymbols
,
7065 0, cu
->language
, objfile
);
7071 xfree (built_actual_name
);
7074 /* Read a partial die corresponding to a namespace; also, add a symbol
7075 corresponding to that namespace to the symbol table. NAMESPACE is
7076 the name of the enclosing namespace. */
7079 add_partial_namespace (struct partial_die_info
*pdi
,
7080 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7081 int set_addrmap
, struct dwarf2_cu
*cu
)
7083 /* Add a symbol for the namespace. */
7085 add_partial_symbol (pdi
, cu
);
7087 /* Now scan partial symbols in that namespace. */
7089 if (pdi
->has_children
)
7090 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7093 /* Read a partial die corresponding to a Fortran module. */
7096 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7097 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7099 /* Add a symbol for the namespace. */
7101 add_partial_symbol (pdi
, cu
);
7103 /* Now scan partial symbols in that module. */
7105 if (pdi
->has_children
)
7106 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7109 /* Read a partial die corresponding to a subprogram and create a partial
7110 symbol for that subprogram. When the CU language allows it, this
7111 routine also defines a partial symbol for each nested subprogram
7112 that this subprogram contains. If SET_ADDRMAP is true, record the
7113 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7114 and highest PC values found in PDI.
7116 PDI may also be a lexical block, in which case we simply search
7117 recursively for subprograms defined inside that lexical block.
7118 Again, this is only performed when the CU language allows this
7119 type of definitions. */
7122 add_partial_subprogram (struct partial_die_info
*pdi
,
7123 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7124 int set_addrmap
, struct dwarf2_cu
*cu
)
7126 if (pdi
->tag
== DW_TAG_subprogram
)
7128 if (pdi
->has_pc_info
)
7130 if (pdi
->lowpc
< *lowpc
)
7131 *lowpc
= pdi
->lowpc
;
7132 if (pdi
->highpc
> *highpc
)
7133 *highpc
= pdi
->highpc
;
7136 struct objfile
*objfile
= cu
->objfile
;
7137 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7142 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7143 SECT_OFF_TEXT (objfile
));
7144 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7145 pdi
->lowpc
+ baseaddr
);
7146 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7147 pdi
->highpc
+ baseaddr
);
7148 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7149 cu
->per_cu
->v
.psymtab
);
7153 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7155 if (!pdi
->is_declaration
)
7156 /* Ignore subprogram DIEs that do not have a name, they are
7157 illegal. Do not emit a complaint at this point, we will
7158 do so when we convert this psymtab into a symtab. */
7160 add_partial_symbol (pdi
, cu
);
7164 if (! pdi
->has_children
)
7167 if (cu
->language
== language_ada
)
7169 pdi
= pdi
->die_child
;
7172 fixup_partial_die (pdi
, cu
);
7173 if (pdi
->tag
== DW_TAG_subprogram
7174 || pdi
->tag
== DW_TAG_lexical_block
)
7175 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7176 pdi
= pdi
->die_sibling
;
7181 /* Read a partial die corresponding to an enumeration type. */
7184 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7185 struct dwarf2_cu
*cu
)
7187 struct partial_die_info
*pdi
;
7189 if (enum_pdi
->name
!= NULL
)
7190 add_partial_symbol (enum_pdi
, cu
);
7192 pdi
= enum_pdi
->die_child
;
7195 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7196 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7198 add_partial_symbol (pdi
, cu
);
7199 pdi
= pdi
->die_sibling
;
7203 /* Return the initial uleb128 in the die at INFO_PTR. */
7206 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7208 unsigned int bytes_read
;
7210 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7213 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7214 Return the corresponding abbrev, or NULL if the number is zero (indicating
7215 an empty DIE). In either case *BYTES_READ will be set to the length of
7216 the initial number. */
7218 static struct abbrev_info
*
7219 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7220 struct dwarf2_cu
*cu
)
7222 bfd
*abfd
= cu
->objfile
->obfd
;
7223 unsigned int abbrev_number
;
7224 struct abbrev_info
*abbrev
;
7226 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7228 if (abbrev_number
== 0)
7231 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7234 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7235 " at offset 0x%x [in module %s]"),
7236 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7237 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7243 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7244 Returns a pointer to the end of a series of DIEs, terminated by an empty
7245 DIE. Any children of the skipped DIEs will also be skipped. */
7247 static const gdb_byte
*
7248 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7250 struct dwarf2_cu
*cu
= reader
->cu
;
7251 struct abbrev_info
*abbrev
;
7252 unsigned int bytes_read
;
7256 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7258 return info_ptr
+ bytes_read
;
7260 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7264 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7265 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7266 abbrev corresponding to that skipped uleb128 should be passed in
7267 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7270 static const gdb_byte
*
7271 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7272 struct abbrev_info
*abbrev
)
7274 unsigned int bytes_read
;
7275 struct attribute attr
;
7276 bfd
*abfd
= reader
->abfd
;
7277 struct dwarf2_cu
*cu
= reader
->cu
;
7278 const gdb_byte
*buffer
= reader
->buffer
;
7279 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7280 unsigned int form
, i
;
7282 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7284 /* The only abbrev we care about is DW_AT_sibling. */
7285 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7287 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7288 if (attr
.form
== DW_FORM_ref_addr
)
7289 complaint (&symfile_complaints
,
7290 _("ignoring absolute DW_AT_sibling"));
7293 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7294 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7296 if (sibling_ptr
< info_ptr
)
7297 complaint (&symfile_complaints
,
7298 _("DW_AT_sibling points backwards"));
7299 else if (sibling_ptr
> reader
->buffer_end
)
7300 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7306 /* If it isn't DW_AT_sibling, skip this attribute. */
7307 form
= abbrev
->attrs
[i
].form
;
7311 case DW_FORM_ref_addr
:
7312 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7313 and later it is offset sized. */
7314 if (cu
->header
.version
== 2)
7315 info_ptr
+= cu
->header
.addr_size
;
7317 info_ptr
+= cu
->header
.offset_size
;
7319 case DW_FORM_GNU_ref_alt
:
7320 info_ptr
+= cu
->header
.offset_size
;
7323 info_ptr
+= cu
->header
.addr_size
;
7330 case DW_FORM_flag_present
:
7342 case DW_FORM_ref_sig8
:
7345 case DW_FORM_string
:
7346 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7347 info_ptr
+= bytes_read
;
7349 case DW_FORM_sec_offset
:
7351 case DW_FORM_GNU_strp_alt
:
7352 info_ptr
+= cu
->header
.offset_size
;
7354 case DW_FORM_exprloc
:
7356 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7357 info_ptr
+= bytes_read
;
7359 case DW_FORM_block1
:
7360 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7362 case DW_FORM_block2
:
7363 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7365 case DW_FORM_block4
:
7366 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7370 case DW_FORM_ref_udata
:
7371 case DW_FORM_GNU_addr_index
:
7372 case DW_FORM_GNU_str_index
:
7373 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7375 case DW_FORM_indirect
:
7376 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7377 info_ptr
+= bytes_read
;
7378 /* We need to continue parsing from here, so just go back to
7380 goto skip_attribute
;
7383 error (_("Dwarf Error: Cannot handle %s "
7384 "in DWARF reader [in module %s]"),
7385 dwarf_form_name (form
),
7386 bfd_get_filename (abfd
));
7390 if (abbrev
->has_children
)
7391 return skip_children (reader
, info_ptr
);
7396 /* Locate ORIG_PDI's sibling.
7397 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7399 static const gdb_byte
*
7400 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7401 struct partial_die_info
*orig_pdi
,
7402 const gdb_byte
*info_ptr
)
7404 /* Do we know the sibling already? */
7406 if (orig_pdi
->sibling
)
7407 return orig_pdi
->sibling
;
7409 /* Are there any children to deal with? */
7411 if (!orig_pdi
->has_children
)
7414 /* Skip the children the long way. */
7416 return skip_children (reader
, info_ptr
);
7419 /* Expand this partial symbol table into a full symbol table. SELF is
7423 dwarf2_read_symtab (struct partial_symtab
*self
,
7424 struct objfile
*objfile
)
7428 warning (_("bug: psymtab for %s is already read in."),
7435 printf_filtered (_("Reading in symbols for %s..."),
7437 gdb_flush (gdb_stdout
);
7440 /* Restore our global data. */
7442 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7443 dwarf2_objfile_data_key
);
7445 /* If this psymtab is constructed from a debug-only objfile, the
7446 has_section_at_zero flag will not necessarily be correct. We
7447 can get the correct value for this flag by looking at the data
7448 associated with the (presumably stripped) associated objfile. */
7449 if (objfile
->separate_debug_objfile_backlink
)
7451 struct dwarf2_per_objfile
*dpo_backlink
7452 = ((struct dwarf2_per_objfile
*)
7453 objfile_data (objfile
->separate_debug_objfile_backlink
,
7454 dwarf2_objfile_data_key
));
7456 dwarf2_per_objfile
->has_section_at_zero
7457 = dpo_backlink
->has_section_at_zero
;
7460 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7462 psymtab_to_symtab_1 (self
);
7464 /* Finish up the debug error message. */
7466 printf_filtered (_("done.\n"));
7469 process_cu_includes ();
7472 /* Reading in full CUs. */
7474 /* Add PER_CU to the queue. */
7477 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7478 enum language pretend_language
)
7480 struct dwarf2_queue_item
*item
;
7483 item
= XNEW (struct dwarf2_queue_item
);
7484 item
->per_cu
= per_cu
;
7485 item
->pretend_language
= pretend_language
;
7488 if (dwarf2_queue
== NULL
)
7489 dwarf2_queue
= item
;
7491 dwarf2_queue_tail
->next
= item
;
7493 dwarf2_queue_tail
= item
;
7496 /* If PER_CU is not yet queued, add it to the queue.
7497 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7499 The result is non-zero if PER_CU was queued, otherwise the result is zero
7500 meaning either PER_CU is already queued or it is already loaded.
7502 N.B. There is an invariant here that if a CU is queued then it is loaded.
7503 The caller is required to load PER_CU if we return non-zero. */
7506 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7507 struct dwarf2_per_cu_data
*per_cu
,
7508 enum language pretend_language
)
7510 /* We may arrive here during partial symbol reading, if we need full
7511 DIEs to process an unusual case (e.g. template arguments). Do
7512 not queue PER_CU, just tell our caller to load its DIEs. */
7513 if (dwarf2_per_objfile
->reading_partial_symbols
)
7515 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7520 /* Mark the dependence relation so that we don't flush PER_CU
7522 if (dependent_cu
!= NULL
)
7523 dwarf2_add_dependence (dependent_cu
, per_cu
);
7525 /* If it's already on the queue, we have nothing to do. */
7529 /* If the compilation unit is already loaded, just mark it as
7531 if (per_cu
->cu
!= NULL
)
7533 per_cu
->cu
->last_used
= 0;
7537 /* Add it to the queue. */
7538 queue_comp_unit (per_cu
, pretend_language
);
7543 /* Process the queue. */
7546 process_queue (void)
7548 struct dwarf2_queue_item
*item
, *next_item
;
7550 if (dwarf_read_debug
)
7552 fprintf_unfiltered (gdb_stdlog
,
7553 "Expanding one or more symtabs of objfile %s ...\n",
7554 objfile_name (dwarf2_per_objfile
->objfile
));
7557 /* The queue starts out with one item, but following a DIE reference
7558 may load a new CU, adding it to the end of the queue. */
7559 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7561 if ((dwarf2_per_objfile
->using_index
7562 ? !item
->per_cu
->v
.quick
->compunit_symtab
7563 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7564 /* Skip dummy CUs. */
7565 && item
->per_cu
->cu
!= NULL
)
7567 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7568 unsigned int debug_print_threshold
;
7571 if (per_cu
->is_debug_types
)
7573 struct signatured_type
*sig_type
=
7574 (struct signatured_type
*) per_cu
;
7576 sprintf (buf
, "TU %s at offset 0x%x",
7577 hex_string (sig_type
->signature
),
7578 per_cu
->offset
.sect_off
);
7579 /* There can be 100s of TUs.
7580 Only print them in verbose mode. */
7581 debug_print_threshold
= 2;
7585 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7586 debug_print_threshold
= 1;
7589 if (dwarf_read_debug
>= debug_print_threshold
)
7590 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7592 if (per_cu
->is_debug_types
)
7593 process_full_type_unit (per_cu
, item
->pretend_language
);
7595 process_full_comp_unit (per_cu
, item
->pretend_language
);
7597 if (dwarf_read_debug
>= debug_print_threshold
)
7598 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7601 item
->per_cu
->queued
= 0;
7602 next_item
= item
->next
;
7606 dwarf2_queue_tail
= NULL
;
7608 if (dwarf_read_debug
)
7610 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7611 objfile_name (dwarf2_per_objfile
->objfile
));
7615 /* Free all allocated queue entries. This function only releases anything if
7616 an error was thrown; if the queue was processed then it would have been
7617 freed as we went along. */
7620 dwarf2_release_queue (void *dummy
)
7622 struct dwarf2_queue_item
*item
, *last
;
7624 item
= dwarf2_queue
;
7627 /* Anything still marked queued is likely to be in an
7628 inconsistent state, so discard it. */
7629 if (item
->per_cu
->queued
)
7631 if (item
->per_cu
->cu
!= NULL
)
7632 free_one_cached_comp_unit (item
->per_cu
);
7633 item
->per_cu
->queued
= 0;
7641 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7644 /* Read in full symbols for PST, and anything it depends on. */
7647 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7649 struct dwarf2_per_cu_data
*per_cu
;
7655 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7656 if (!pst
->dependencies
[i
]->readin
7657 && pst
->dependencies
[i
]->user
== NULL
)
7659 /* Inform about additional files that need to be read in. */
7662 /* FIXME: i18n: Need to make this a single string. */
7663 fputs_filtered (" ", gdb_stdout
);
7665 fputs_filtered ("and ", gdb_stdout
);
7667 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7668 wrap_here (""); /* Flush output. */
7669 gdb_flush (gdb_stdout
);
7671 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7674 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7678 /* It's an include file, no symbols to read for it.
7679 Everything is in the parent symtab. */
7684 dw2_do_instantiate_symtab (per_cu
);
7687 /* Trivial hash function for die_info: the hash value of a DIE
7688 is its offset in .debug_info for this objfile. */
7691 die_hash (const void *item
)
7693 const struct die_info
*die
= (const struct die_info
*) item
;
7695 return die
->offset
.sect_off
;
7698 /* Trivial comparison function for die_info structures: two DIEs
7699 are equal if they have the same offset. */
7702 die_eq (const void *item_lhs
, const void *item_rhs
)
7704 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7705 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7707 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7710 /* die_reader_func for load_full_comp_unit.
7711 This is identical to read_signatured_type_reader,
7712 but is kept separate for now. */
7715 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7716 const gdb_byte
*info_ptr
,
7717 struct die_info
*comp_unit_die
,
7721 struct dwarf2_cu
*cu
= reader
->cu
;
7722 enum language
*language_ptr
= (enum language
*) data
;
7724 gdb_assert (cu
->die_hash
== NULL
);
7726 htab_create_alloc_ex (cu
->header
.length
/ 12,
7730 &cu
->comp_unit_obstack
,
7731 hashtab_obstack_allocate
,
7732 dummy_obstack_deallocate
);
7735 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7736 &info_ptr
, comp_unit_die
);
7737 cu
->dies
= comp_unit_die
;
7738 /* comp_unit_die is not stored in die_hash, no need. */
7740 /* We try not to read any attributes in this function, because not
7741 all CUs needed for references have been loaded yet, and symbol
7742 table processing isn't initialized. But we have to set the CU language,
7743 or we won't be able to build types correctly.
7744 Similarly, if we do not read the producer, we can not apply
7745 producer-specific interpretation. */
7746 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7749 /* Load the DIEs associated with PER_CU into memory. */
7752 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7753 enum language pretend_language
)
7755 gdb_assert (! this_cu
->is_debug_types
);
7757 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7758 load_full_comp_unit_reader
, &pretend_language
);
7761 /* Add a DIE to the delayed physname list. */
7764 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7765 const char *name
, struct die_info
*die
,
7766 struct dwarf2_cu
*cu
)
7768 struct delayed_method_info mi
;
7770 mi
.fnfield_index
= fnfield_index
;
7774 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7777 /* A cleanup for freeing the delayed method list. */
7780 free_delayed_list (void *ptr
)
7782 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7783 if (cu
->method_list
!= NULL
)
7785 VEC_free (delayed_method_info
, cu
->method_list
);
7786 cu
->method_list
= NULL
;
7790 /* Compute the physnames of any methods on the CU's method list.
7792 The computation of method physnames is delayed in order to avoid the
7793 (bad) condition that one of the method's formal parameters is of an as yet
7797 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7800 struct delayed_method_info
*mi
;
7801 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7803 const char *physname
;
7804 struct fn_fieldlist
*fn_flp
7805 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7806 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7807 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7808 = physname
? physname
: "";
7812 /* Go objects should be embedded in a DW_TAG_module DIE,
7813 and it's not clear if/how imported objects will appear.
7814 To keep Go support simple until that's worked out,
7815 go back through what we've read and create something usable.
7816 We could do this while processing each DIE, and feels kinda cleaner,
7817 but that way is more invasive.
7818 This is to, for example, allow the user to type "p var" or "b main"
7819 without having to specify the package name, and allow lookups
7820 of module.object to work in contexts that use the expression
7824 fixup_go_packaging (struct dwarf2_cu
*cu
)
7826 char *package_name
= NULL
;
7827 struct pending
*list
;
7830 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7832 for (i
= 0; i
< list
->nsyms
; ++i
)
7834 struct symbol
*sym
= list
->symbol
[i
];
7836 if (SYMBOL_LANGUAGE (sym
) == language_go
7837 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7839 char *this_package_name
= go_symbol_package_name (sym
);
7841 if (this_package_name
== NULL
)
7843 if (package_name
== NULL
)
7844 package_name
= this_package_name
;
7847 if (strcmp (package_name
, this_package_name
) != 0)
7848 complaint (&symfile_complaints
,
7849 _("Symtab %s has objects from two different Go packages: %s and %s"),
7850 (symbol_symtab (sym
) != NULL
7851 ? symtab_to_filename_for_display
7852 (symbol_symtab (sym
))
7853 : objfile_name (cu
->objfile
)),
7854 this_package_name
, package_name
);
7855 xfree (this_package_name
);
7861 if (package_name
!= NULL
)
7863 struct objfile
*objfile
= cu
->objfile
;
7864 const char *saved_package_name
7865 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7867 strlen (package_name
));
7868 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7869 saved_package_name
, objfile
);
7872 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7874 sym
= allocate_symbol (objfile
);
7875 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7876 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7877 strlen (saved_package_name
), 0, objfile
);
7878 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7879 e.g., "main" finds the "main" module and not C's main(). */
7880 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7881 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7882 SYMBOL_TYPE (sym
) = type
;
7884 add_symbol_to_list (sym
, &global_symbols
);
7886 xfree (package_name
);
7890 /* Return the symtab for PER_CU. This works properly regardless of
7891 whether we're using the index or psymtabs. */
7893 static struct compunit_symtab
*
7894 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7896 return (dwarf2_per_objfile
->using_index
7897 ? per_cu
->v
.quick
->compunit_symtab
7898 : per_cu
->v
.psymtab
->compunit_symtab
);
7901 /* A helper function for computing the list of all symbol tables
7902 included by PER_CU. */
7905 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7906 htab_t all_children
, htab_t all_type_symtabs
,
7907 struct dwarf2_per_cu_data
*per_cu
,
7908 struct compunit_symtab
*immediate_parent
)
7912 struct compunit_symtab
*cust
;
7913 struct dwarf2_per_cu_data
*iter
;
7915 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7918 /* This inclusion and its children have been processed. */
7923 /* Only add a CU if it has a symbol table. */
7924 cust
= get_compunit_symtab (per_cu
);
7927 /* If this is a type unit only add its symbol table if we haven't
7928 seen it yet (type unit per_cu's can share symtabs). */
7929 if (per_cu
->is_debug_types
)
7931 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7935 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7936 if (cust
->user
== NULL
)
7937 cust
->user
= immediate_parent
;
7942 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7943 if (cust
->user
== NULL
)
7944 cust
->user
= immediate_parent
;
7949 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7952 recursively_compute_inclusions (result
, all_children
,
7953 all_type_symtabs
, iter
, cust
);
7957 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7961 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7963 gdb_assert (! per_cu
->is_debug_types
);
7965 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7968 struct dwarf2_per_cu_data
*per_cu_iter
;
7969 struct compunit_symtab
*compunit_symtab_iter
;
7970 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7971 htab_t all_children
, all_type_symtabs
;
7972 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7974 /* If we don't have a symtab, we can just skip this case. */
7978 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7979 NULL
, xcalloc
, xfree
);
7980 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7981 NULL
, xcalloc
, xfree
);
7984 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7988 recursively_compute_inclusions (&result_symtabs
, all_children
,
7989 all_type_symtabs
, per_cu_iter
,
7993 /* Now we have a transitive closure of all the included symtabs. */
7994 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7996 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7997 struct compunit_symtab
*, len
+ 1);
7999 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
8000 compunit_symtab_iter
);
8002 cust
->includes
[ix
] = compunit_symtab_iter
;
8003 cust
->includes
[len
] = NULL
;
8005 VEC_free (compunit_symtab_ptr
, result_symtabs
);
8006 htab_delete (all_children
);
8007 htab_delete (all_type_symtabs
);
8011 /* Compute the 'includes' field for the symtabs of all the CUs we just
8015 process_cu_includes (void)
8018 struct dwarf2_per_cu_data
*iter
;
8021 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8025 if (! iter
->is_debug_types
)
8026 compute_compunit_symtab_includes (iter
);
8029 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8032 /* Generate full symbol information for PER_CU, whose DIEs have
8033 already been loaded into memory. */
8036 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8037 enum language pretend_language
)
8039 struct dwarf2_cu
*cu
= per_cu
->cu
;
8040 struct objfile
*objfile
= per_cu
->objfile
;
8041 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8042 CORE_ADDR lowpc
, highpc
;
8043 struct compunit_symtab
*cust
;
8044 struct cleanup
*back_to
, *delayed_list_cleanup
;
8046 struct block
*static_block
;
8049 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8052 back_to
= make_cleanup (really_free_pendings
, NULL
);
8053 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8055 cu
->list_in_scope
= &file_symbols
;
8057 cu
->language
= pretend_language
;
8058 cu
->language_defn
= language_def (cu
->language
);
8060 /* Do line number decoding in read_file_scope () */
8061 process_die (cu
->dies
, cu
);
8063 /* For now fudge the Go package. */
8064 if (cu
->language
== language_go
)
8065 fixup_go_packaging (cu
);
8067 /* Now that we have processed all the DIEs in the CU, all the types
8068 should be complete, and it should now be safe to compute all of the
8070 compute_delayed_physnames (cu
);
8071 do_cleanups (delayed_list_cleanup
);
8073 /* Some compilers don't define a DW_AT_high_pc attribute for the
8074 compilation unit. If the DW_AT_high_pc is missing, synthesize
8075 it, by scanning the DIE's below the compilation unit. */
8076 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8078 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8079 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8081 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8082 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8083 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8084 addrmap to help ensure it has an accurate map of pc values belonging to
8086 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8088 cust
= end_symtab_from_static_block (static_block
,
8089 SECT_OFF_TEXT (objfile
), 0);
8093 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8095 /* Set symtab language to language from DW_AT_language. If the
8096 compilation is from a C file generated by language preprocessors, do
8097 not set the language if it was already deduced by start_subfile. */
8098 if (!(cu
->language
== language_c
8099 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8100 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8102 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8103 produce DW_AT_location with location lists but it can be possibly
8104 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8105 there were bugs in prologue debug info, fixed later in GCC-4.5
8106 by "unwind info for epilogues" patch (which is not directly related).
8108 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8109 needed, it would be wrong due to missing DW_AT_producer there.
8111 Still one can confuse GDB by using non-standard GCC compilation
8112 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8114 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8115 cust
->locations_valid
= 1;
8117 if (gcc_4_minor
>= 5)
8118 cust
->epilogue_unwind_valid
= 1;
8120 cust
->call_site_htab
= cu
->call_site_htab
;
8123 if (dwarf2_per_objfile
->using_index
)
8124 per_cu
->v
.quick
->compunit_symtab
= cust
;
8127 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8128 pst
->compunit_symtab
= cust
;
8132 /* Push it for inclusion processing later. */
8133 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8135 do_cleanups (back_to
);
8138 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8139 already been loaded into memory. */
8142 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8143 enum language pretend_language
)
8145 struct dwarf2_cu
*cu
= per_cu
->cu
;
8146 struct objfile
*objfile
= per_cu
->objfile
;
8147 struct compunit_symtab
*cust
;
8148 struct cleanup
*back_to
, *delayed_list_cleanup
;
8149 struct signatured_type
*sig_type
;
8151 gdb_assert (per_cu
->is_debug_types
);
8152 sig_type
= (struct signatured_type
*) per_cu
;
8155 back_to
= make_cleanup (really_free_pendings
, NULL
);
8156 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8158 cu
->list_in_scope
= &file_symbols
;
8160 cu
->language
= pretend_language
;
8161 cu
->language_defn
= language_def (cu
->language
);
8163 /* The symbol tables are set up in read_type_unit_scope. */
8164 process_die (cu
->dies
, cu
);
8166 /* For now fudge the Go package. */
8167 if (cu
->language
== language_go
)
8168 fixup_go_packaging (cu
);
8170 /* Now that we have processed all the DIEs in the CU, all the types
8171 should be complete, and it should now be safe to compute all of the
8173 compute_delayed_physnames (cu
);
8174 do_cleanups (delayed_list_cleanup
);
8176 /* TUs share symbol tables.
8177 If this is the first TU to use this symtab, complete the construction
8178 of it with end_expandable_symtab. Otherwise, complete the addition of
8179 this TU's symbols to the existing symtab. */
8180 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8182 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8183 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8187 /* Set symtab language to language from DW_AT_language. If the
8188 compilation is from a C file generated by language preprocessors,
8189 do not set the language if it was already deduced by
8191 if (!(cu
->language
== language_c
8192 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8193 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8198 augment_type_symtab ();
8199 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8202 if (dwarf2_per_objfile
->using_index
)
8203 per_cu
->v
.quick
->compunit_symtab
= cust
;
8206 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8207 pst
->compunit_symtab
= cust
;
8211 do_cleanups (back_to
);
8214 /* Process an imported unit DIE. */
8217 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8219 struct attribute
*attr
;
8221 /* For now we don't handle imported units in type units. */
8222 if (cu
->per_cu
->is_debug_types
)
8224 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8225 " supported in type units [in module %s]"),
8226 objfile_name (cu
->objfile
));
8229 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8232 struct dwarf2_per_cu_data
*per_cu
;
8236 offset
= dwarf2_get_ref_die_offset (attr
);
8237 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8238 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8240 /* If necessary, add it to the queue and load its DIEs. */
8241 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8242 load_full_comp_unit (per_cu
, cu
->language
);
8244 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8249 /* Reset the in_process bit of a die. */
8252 reset_die_in_process (void *arg
)
8254 struct die_info
*die
= (struct die_info
*) arg
;
8256 die
->in_process
= 0;
8259 /* Process a die and its children. */
8262 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8264 struct cleanup
*in_process
;
8266 /* We should only be processing those not already in process. */
8267 gdb_assert (!die
->in_process
);
8269 die
->in_process
= 1;
8270 in_process
= make_cleanup (reset_die_in_process
,die
);
8274 case DW_TAG_padding
:
8276 case DW_TAG_compile_unit
:
8277 case DW_TAG_partial_unit
:
8278 read_file_scope (die
, cu
);
8280 case DW_TAG_type_unit
:
8281 read_type_unit_scope (die
, cu
);
8283 case DW_TAG_subprogram
:
8284 case DW_TAG_inlined_subroutine
:
8285 read_func_scope (die
, cu
);
8287 case DW_TAG_lexical_block
:
8288 case DW_TAG_try_block
:
8289 case DW_TAG_catch_block
:
8290 read_lexical_block_scope (die
, cu
);
8292 case DW_TAG_GNU_call_site
:
8293 read_call_site_scope (die
, cu
);
8295 case DW_TAG_class_type
:
8296 case DW_TAG_interface_type
:
8297 case DW_TAG_structure_type
:
8298 case DW_TAG_union_type
:
8299 process_structure_scope (die
, cu
);
8301 case DW_TAG_enumeration_type
:
8302 process_enumeration_scope (die
, cu
);
8305 /* These dies have a type, but processing them does not create
8306 a symbol or recurse to process the children. Therefore we can
8307 read them on-demand through read_type_die. */
8308 case DW_TAG_subroutine_type
:
8309 case DW_TAG_set_type
:
8310 case DW_TAG_array_type
:
8311 case DW_TAG_pointer_type
:
8312 case DW_TAG_ptr_to_member_type
:
8313 case DW_TAG_reference_type
:
8314 case DW_TAG_string_type
:
8317 case DW_TAG_base_type
:
8318 case DW_TAG_subrange_type
:
8319 case DW_TAG_typedef
:
8320 /* Add a typedef symbol for the type definition, if it has a
8322 new_symbol (die
, read_type_die (die
, cu
), cu
);
8324 case DW_TAG_common_block
:
8325 read_common_block (die
, cu
);
8327 case DW_TAG_common_inclusion
:
8329 case DW_TAG_namespace
:
8330 cu
->processing_has_namespace_info
= 1;
8331 read_namespace (die
, cu
);
8334 cu
->processing_has_namespace_info
= 1;
8335 read_module (die
, cu
);
8337 case DW_TAG_imported_declaration
:
8338 cu
->processing_has_namespace_info
= 1;
8339 if (read_namespace_alias (die
, cu
))
8341 /* The declaration is not a global namespace alias: fall through. */
8342 case DW_TAG_imported_module
:
8343 cu
->processing_has_namespace_info
= 1;
8344 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8345 || cu
->language
!= language_fortran
))
8346 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8347 dwarf_tag_name (die
->tag
));
8348 read_import_statement (die
, cu
);
8351 case DW_TAG_imported_unit
:
8352 process_imported_unit_die (die
, cu
);
8356 new_symbol (die
, NULL
, cu
);
8360 do_cleanups (in_process
);
8363 /* DWARF name computation. */
8365 /* A helper function for dwarf2_compute_name which determines whether DIE
8366 needs to have the name of the scope prepended to the name listed in the
8370 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8372 struct attribute
*attr
;
8376 case DW_TAG_namespace
:
8377 case DW_TAG_typedef
:
8378 case DW_TAG_class_type
:
8379 case DW_TAG_interface_type
:
8380 case DW_TAG_structure_type
:
8381 case DW_TAG_union_type
:
8382 case DW_TAG_enumeration_type
:
8383 case DW_TAG_enumerator
:
8384 case DW_TAG_subprogram
:
8385 case DW_TAG_inlined_subroutine
:
8387 case DW_TAG_imported_declaration
:
8390 case DW_TAG_variable
:
8391 case DW_TAG_constant
:
8392 /* We only need to prefix "globally" visible variables. These include
8393 any variable marked with DW_AT_external or any variable that
8394 lives in a namespace. [Variables in anonymous namespaces
8395 require prefixing, but they are not DW_AT_external.] */
8397 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8399 struct dwarf2_cu
*spec_cu
= cu
;
8401 return die_needs_namespace (die_specification (die
, &spec_cu
),
8405 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8406 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8407 && die
->parent
->tag
!= DW_TAG_module
)
8409 /* A variable in a lexical block of some kind does not need a
8410 namespace, even though in C++ such variables may be external
8411 and have a mangled name. */
8412 if (die
->parent
->tag
== DW_TAG_lexical_block
8413 || die
->parent
->tag
== DW_TAG_try_block
8414 || die
->parent
->tag
== DW_TAG_catch_block
8415 || die
->parent
->tag
== DW_TAG_subprogram
)
8424 /* Retrieve the last character from a mem_file. */
8427 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8429 char *last_char_p
= (char *) object
;
8432 *last_char_p
= buffer
[length
- 1];
8435 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8436 compute the physname for the object, which include a method's:
8437 - formal parameters (C++/Java),
8438 - receiver type (Go),
8439 - return type (Java).
8441 The term "physname" is a bit confusing.
8442 For C++, for example, it is the demangled name.
8443 For Go, for example, it's the mangled name.
8445 For Ada, return the DIE's linkage name rather than the fully qualified
8446 name. PHYSNAME is ignored..
8448 The result is allocated on the objfile_obstack and canonicalized. */
8451 dwarf2_compute_name (const char *name
,
8452 struct die_info
*die
, struct dwarf2_cu
*cu
,
8455 struct objfile
*objfile
= cu
->objfile
;
8458 name
= dwarf2_name (die
, cu
);
8460 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8461 but otherwise compute it by typename_concat inside GDB.
8462 FIXME: Actually this is not really true, or at least not always true.
8463 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8464 Fortran names because there is no mangling standard. So new_symbol_full
8465 will set the demangled name to the result of dwarf2_full_name, and it is
8466 the demangled name that GDB uses if it exists. */
8467 if (cu
->language
== language_ada
8468 || (cu
->language
== language_fortran
&& physname
))
8470 /* For Ada unit, we prefer the linkage name over the name, as
8471 the former contains the exported name, which the user expects
8472 to be able to reference. Ideally, we want the user to be able
8473 to reference this entity using either natural or linkage name,
8474 but we haven't started looking at this enhancement yet. */
8475 const char *linkage_name
;
8477 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8478 if (linkage_name
== NULL
)
8479 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8480 if (linkage_name
!= NULL
)
8481 return linkage_name
;
8484 /* These are the only languages we know how to qualify names in. */
8486 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8487 || cu
->language
== language_fortran
|| cu
->language
== language_d
8488 || cu
->language
== language_rust
))
8490 if (die_needs_namespace (die
, cu
))
8494 struct ui_file
*buf
;
8495 char *intermediate_name
;
8496 const char *canonical_name
= NULL
;
8498 prefix
= determine_prefix (die
, cu
);
8499 buf
= mem_fileopen ();
8500 if (*prefix
!= '\0')
8502 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8505 fputs_unfiltered (prefixed_name
, buf
);
8506 xfree (prefixed_name
);
8509 fputs_unfiltered (name
, buf
);
8511 /* Template parameters may be specified in the DIE's DW_AT_name, or
8512 as children with DW_TAG_template_type_param or
8513 DW_TAG_value_type_param. If the latter, add them to the name
8514 here. If the name already has template parameters, then
8515 skip this step; some versions of GCC emit both, and
8516 it is more efficient to use the pre-computed name.
8518 Something to keep in mind about this process: it is very
8519 unlikely, or in some cases downright impossible, to produce
8520 something that will match the mangled name of a function.
8521 If the definition of the function has the same debug info,
8522 we should be able to match up with it anyway. But fallbacks
8523 using the minimal symbol, for instance to find a method
8524 implemented in a stripped copy of libstdc++, will not work.
8525 If we do not have debug info for the definition, we will have to
8526 match them up some other way.
8528 When we do name matching there is a related problem with function
8529 templates; two instantiated function templates are allowed to
8530 differ only by their return types, which we do not add here. */
8532 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8534 struct attribute
*attr
;
8535 struct die_info
*child
;
8538 die
->building_fullname
= 1;
8540 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8544 const gdb_byte
*bytes
;
8545 struct dwarf2_locexpr_baton
*baton
;
8548 if (child
->tag
!= DW_TAG_template_type_param
8549 && child
->tag
!= DW_TAG_template_value_param
)
8554 fputs_unfiltered ("<", buf
);
8558 fputs_unfiltered (", ", buf
);
8560 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8563 complaint (&symfile_complaints
,
8564 _("template parameter missing DW_AT_type"));
8565 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8568 type
= die_type (child
, cu
);
8570 if (child
->tag
== DW_TAG_template_type_param
)
8572 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8576 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8579 complaint (&symfile_complaints
,
8580 _("template parameter missing "
8581 "DW_AT_const_value"));
8582 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8586 dwarf2_const_value_attr (attr
, type
, name
,
8587 &cu
->comp_unit_obstack
, cu
,
8588 &value
, &bytes
, &baton
);
8590 if (TYPE_NOSIGN (type
))
8591 /* GDB prints characters as NUMBER 'CHAR'. If that's
8592 changed, this can use value_print instead. */
8593 c_printchar (value
, type
, buf
);
8596 struct value_print_options opts
;
8599 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8603 else if (bytes
!= NULL
)
8605 v
= allocate_value (type
);
8606 memcpy (value_contents_writeable (v
), bytes
,
8607 TYPE_LENGTH (type
));
8610 v
= value_from_longest (type
, value
);
8612 /* Specify decimal so that we do not depend on
8614 get_formatted_print_options (&opts
, 'd');
8616 value_print (v
, buf
, &opts
);
8622 die
->building_fullname
= 0;
8626 /* Close the argument list, with a space if necessary
8627 (nested templates). */
8628 char last_char
= '\0';
8629 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8630 if (last_char
== '>')
8631 fputs_unfiltered (" >", buf
);
8633 fputs_unfiltered (">", buf
);
8637 /* For Java and C++ methods, append formal parameter type
8638 information, if PHYSNAME. */
8640 if (physname
&& die
->tag
== DW_TAG_subprogram
8641 && (cu
->language
== language_cplus
8642 || cu
->language
== language_java
))
8644 struct type
*type
= read_type_die (die
, cu
);
8646 c_type_print_args (type
, buf
, 1, cu
->language
,
8647 &type_print_raw_options
);
8649 if (cu
->language
== language_java
)
8651 /* For java, we must append the return type to method
8653 if (die
->tag
== DW_TAG_subprogram
)
8654 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8655 0, 0, &type_print_raw_options
);
8657 else if (cu
->language
== language_cplus
)
8659 /* Assume that an artificial first parameter is
8660 "this", but do not crash if it is not. RealView
8661 marks unnamed (and thus unused) parameters as
8662 artificial; there is no way to differentiate
8664 if (TYPE_NFIELDS (type
) > 0
8665 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8666 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8667 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8669 fputs_unfiltered (" const", buf
);
8673 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8674 ui_file_delete (buf
);
8676 if (cu
->language
== language_cplus
)
8678 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8679 &objfile
->per_bfd
->storage_obstack
);
8681 /* If we only computed INTERMEDIATE_NAME, or if
8682 INTERMEDIATE_NAME is already canonical, then we need to
8683 copy it to the appropriate obstack. */
8684 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8685 name
= ((const char *)
8686 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8688 strlen (intermediate_name
)));
8690 name
= canonical_name
;
8692 xfree (intermediate_name
);
8699 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8700 If scope qualifiers are appropriate they will be added. The result
8701 will be allocated on the storage_obstack, or NULL if the DIE does
8702 not have a name. NAME may either be from a previous call to
8703 dwarf2_name or NULL.
8705 The output string will be canonicalized (if C++/Java). */
8708 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8710 return dwarf2_compute_name (name
, die
, cu
, 0);
8713 /* Construct a physname for the given DIE in CU. NAME may either be
8714 from a previous call to dwarf2_name or NULL. The result will be
8715 allocated on the objfile_objstack or NULL if the DIE does not have a
8718 The output string will be canonicalized (if C++/Java). */
8721 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8723 struct objfile
*objfile
= cu
->objfile
;
8724 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8725 struct cleanup
*back_to
;
8728 /* In this case dwarf2_compute_name is just a shortcut not building anything
8730 if (!die_needs_namespace (die
, cu
))
8731 return dwarf2_compute_name (name
, die
, cu
, 1);
8733 back_to
= make_cleanup (null_cleanup
, NULL
);
8735 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8736 if (mangled
== NULL
)
8737 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8739 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
8740 See https://github.com/rust-lang/rust/issues/32925. */
8741 if (cu
->language
== language_rust
&& mangled
!= NULL
8742 && strchr (mangled
, '{') != NULL
)
8745 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8747 if (mangled
!= NULL
)
8751 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8752 type. It is easier for GDB users to search for such functions as
8753 `name(params)' than `long name(params)'. In such case the minimal
8754 symbol names do not match the full symbol names but for template
8755 functions there is never a need to look up their definition from their
8756 declaration so the only disadvantage remains the minimal symbol
8757 variant `long name(params)' does not have the proper inferior type.
8760 if (cu
->language
== language_go
)
8762 /* This is a lie, but we already lie to the caller new_symbol_full.
8763 new_symbol_full assumes we return the mangled name.
8764 This just undoes that lie until things are cleaned up. */
8769 demangled
= gdb_demangle (mangled
,
8770 (DMGL_PARAMS
| DMGL_ANSI
8771 | (cu
->language
== language_java
8772 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8777 make_cleanup (xfree
, demangled
);
8787 if (canon
== NULL
|| check_physname
)
8789 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8791 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8793 /* It may not mean a bug in GDB. The compiler could also
8794 compute DW_AT_linkage_name incorrectly. But in such case
8795 GDB would need to be bug-to-bug compatible. */
8797 complaint (&symfile_complaints
,
8798 _("Computed physname <%s> does not match demangled <%s> "
8799 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8800 physname
, canon
, mangled
, die
->offset
.sect_off
,
8801 objfile_name (objfile
));
8803 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8804 is available here - over computed PHYSNAME. It is safer
8805 against both buggy GDB and buggy compilers. */
8819 retval
= ((const char *)
8820 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8821 retval
, strlen (retval
)));
8823 do_cleanups (back_to
);
8827 /* Inspect DIE in CU for a namespace alias. If one exists, record
8828 a new symbol for it.
8830 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8833 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8835 struct attribute
*attr
;
8837 /* If the die does not have a name, this is not a namespace
8839 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8843 struct die_info
*d
= die
;
8844 struct dwarf2_cu
*imported_cu
= cu
;
8846 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8847 keep inspecting DIEs until we hit the underlying import. */
8848 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8849 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8851 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8855 d
= follow_die_ref (d
, attr
, &imported_cu
);
8856 if (d
->tag
!= DW_TAG_imported_declaration
)
8860 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8862 complaint (&symfile_complaints
,
8863 _("DIE at 0x%x has too many recursively imported "
8864 "declarations"), d
->offset
.sect_off
);
8871 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8873 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8874 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8876 /* This declaration is a global namespace alias. Add
8877 a symbol for it whose type is the aliased namespace. */
8878 new_symbol (die
, type
, cu
);
8887 /* Return the using directives repository (global or local?) to use in the
8888 current context for LANGUAGE.
8890 For Ada, imported declarations can materialize renamings, which *may* be
8891 global. However it is impossible (for now?) in DWARF to distinguish
8892 "external" imported declarations and "static" ones. As all imported
8893 declarations seem to be static in all other languages, make them all CU-wide
8894 global only in Ada. */
8896 static struct using_direct
**
8897 using_directives (enum language language
)
8899 if (language
== language_ada
&& context_stack_depth
== 0)
8900 return &global_using_directives
;
8902 return &local_using_directives
;
8905 /* Read the import statement specified by the given die and record it. */
8908 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8910 struct objfile
*objfile
= cu
->objfile
;
8911 struct attribute
*import_attr
;
8912 struct die_info
*imported_die
, *child_die
;
8913 struct dwarf2_cu
*imported_cu
;
8914 const char *imported_name
;
8915 const char *imported_name_prefix
;
8916 const char *canonical_name
;
8917 const char *import_alias
;
8918 const char *imported_declaration
= NULL
;
8919 const char *import_prefix
;
8920 VEC (const_char_ptr
) *excludes
= NULL
;
8921 struct cleanup
*cleanups
;
8923 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8924 if (import_attr
== NULL
)
8926 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8927 dwarf_tag_name (die
->tag
));
8932 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8933 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8934 if (imported_name
== NULL
)
8936 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8938 The import in the following code:
8952 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8953 <52> DW_AT_decl_file : 1
8954 <53> DW_AT_decl_line : 6
8955 <54> DW_AT_import : <0x75>
8956 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8958 <5b> DW_AT_decl_file : 1
8959 <5c> DW_AT_decl_line : 2
8960 <5d> DW_AT_type : <0x6e>
8962 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8963 <76> DW_AT_byte_size : 4
8964 <77> DW_AT_encoding : 5 (signed)
8966 imports the wrong die ( 0x75 instead of 0x58 ).
8967 This case will be ignored until the gcc bug is fixed. */
8971 /* Figure out the local name after import. */
8972 import_alias
= dwarf2_name (die
, cu
);
8974 /* Figure out where the statement is being imported to. */
8975 import_prefix
= determine_prefix (die
, cu
);
8977 /* Figure out what the scope of the imported die is and prepend it
8978 to the name of the imported die. */
8979 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8981 if (imported_die
->tag
!= DW_TAG_namespace
8982 && imported_die
->tag
!= DW_TAG_module
)
8984 imported_declaration
= imported_name
;
8985 canonical_name
= imported_name_prefix
;
8987 else if (strlen (imported_name_prefix
) > 0)
8988 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8989 imported_name_prefix
,
8990 (cu
->language
== language_d
? "." : "::"),
8991 imported_name
, (char *) NULL
);
8993 canonical_name
= imported_name
;
8995 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8997 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8998 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8999 child_die
= sibling_die (child_die
))
9001 /* DWARF-4: A Fortran use statement with a “rename list” may be
9002 represented by an imported module entry with an import attribute
9003 referring to the module and owned entries corresponding to those
9004 entities that are renamed as part of being imported. */
9006 if (child_die
->tag
!= DW_TAG_imported_declaration
)
9008 complaint (&symfile_complaints
,
9009 _("child DW_TAG_imported_declaration expected "
9010 "- DIE at 0x%x [in module %s]"),
9011 child_die
->offset
.sect_off
, objfile_name (objfile
));
9015 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
9016 if (import_attr
== NULL
)
9018 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9019 dwarf_tag_name (child_die
->tag
));
9024 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
9026 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9027 if (imported_name
== NULL
)
9029 complaint (&symfile_complaints
,
9030 _("child DW_TAG_imported_declaration has unknown "
9031 "imported name - DIE at 0x%x [in module %s]"),
9032 child_die
->offset
.sect_off
, objfile_name (objfile
));
9036 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9038 process_die (child_die
, cu
);
9041 add_using_directive (using_directives (cu
->language
),
9045 imported_declaration
,
9048 &objfile
->objfile_obstack
);
9050 do_cleanups (cleanups
);
9053 /* Cleanup function for handle_DW_AT_stmt_list. */
9056 free_cu_line_header (void *arg
)
9058 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) arg
;
9060 free_line_header (cu
->line_header
);
9061 cu
->line_header
= NULL
;
9064 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9065 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9066 this, it was first present in GCC release 4.3.0. */
9069 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9071 if (!cu
->checked_producer
)
9072 check_producer (cu
);
9074 return cu
->producer_is_gcc_lt_4_3
;
9078 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9079 const char **name
, const char **comp_dir
)
9081 /* Find the filename. Do not use dwarf2_name here, since the filename
9082 is not a source language identifier. */
9083 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9084 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9086 if (*comp_dir
== NULL
9087 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9088 && IS_ABSOLUTE_PATH (*name
))
9090 char *d
= ldirname (*name
);
9094 make_cleanup (xfree
, d
);
9096 if (*comp_dir
!= NULL
)
9098 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9099 directory, get rid of it. */
9100 const char *cp
= strchr (*comp_dir
, ':');
9102 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9107 *name
= "<unknown>";
9110 /* Handle DW_AT_stmt_list for a compilation unit.
9111 DIE is the DW_TAG_compile_unit die for CU.
9112 COMP_DIR is the compilation directory. LOWPC is passed to
9113 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9116 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9117 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9119 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9120 struct attribute
*attr
;
9121 unsigned int line_offset
;
9122 struct line_header line_header_local
;
9123 hashval_t line_header_local_hash
;
9128 gdb_assert (! cu
->per_cu
->is_debug_types
);
9130 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9134 line_offset
= DW_UNSND (attr
);
9136 /* The line header hash table is only created if needed (it exists to
9137 prevent redundant reading of the line table for partial_units).
9138 If we're given a partial_unit, we'll need it. If we're given a
9139 compile_unit, then use the line header hash table if it's already
9140 created, but don't create one just yet. */
9142 if (dwarf2_per_objfile
->line_header_hash
== NULL
9143 && die
->tag
== DW_TAG_partial_unit
)
9145 dwarf2_per_objfile
->line_header_hash
9146 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9147 line_header_eq_voidp
,
9148 free_line_header_voidp
,
9149 &objfile
->objfile_obstack
,
9150 hashtab_obstack_allocate
,
9151 dummy_obstack_deallocate
);
9154 line_header_local
.offset
.sect_off
= line_offset
;
9155 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9156 line_header_local_hash
= line_header_hash (&line_header_local
);
9157 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9159 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9161 line_header_local_hash
, NO_INSERT
);
9163 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9164 is not present in *SLOT (since if there is something in *SLOT then
9165 it will be for a partial_unit). */
9166 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9168 gdb_assert (*slot
!= NULL
);
9169 cu
->line_header
= (struct line_header
*) *slot
;
9174 /* dwarf_decode_line_header does not yet provide sufficient information.
9175 We always have to call also dwarf_decode_lines for it. */
9176 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9177 if (cu
->line_header
== NULL
)
9180 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9184 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9186 line_header_local_hash
, INSERT
);
9187 gdb_assert (slot
!= NULL
);
9189 if (slot
!= NULL
&& *slot
== NULL
)
9191 /* This newly decoded line number information unit will be owned
9192 by line_header_hash hash table. */
9193 *slot
= cu
->line_header
;
9197 /* We cannot free any current entry in (*slot) as that struct line_header
9198 may be already used by multiple CUs. Create only temporary decoded
9199 line_header for this CU - it may happen at most once for each line
9200 number information unit. And if we're not using line_header_hash
9201 then this is what we want as well. */
9202 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9203 make_cleanup (free_cu_line_header
, cu
);
9205 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9206 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9210 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9213 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9215 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9216 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9217 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9218 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9219 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9220 struct attribute
*attr
;
9221 const char *name
= NULL
;
9222 const char *comp_dir
= NULL
;
9223 struct die_info
*child_die
;
9226 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9228 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9230 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9231 from finish_block. */
9232 if (lowpc
== ((CORE_ADDR
) -1))
9234 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9236 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9238 prepare_one_comp_unit (cu
, die
, cu
->language
);
9240 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9241 standardised yet. As a workaround for the language detection we fall
9242 back to the DW_AT_producer string. */
9243 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9244 cu
->language
= language_opencl
;
9246 /* Similar hack for Go. */
9247 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9248 set_cu_language (DW_LANG_Go
, cu
);
9250 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9252 /* Decode line number information if present. We do this before
9253 processing child DIEs, so that the line header table is available
9254 for DW_AT_decl_file. */
9255 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9257 /* Process all dies in compilation unit. */
9258 if (die
->child
!= NULL
)
9260 child_die
= die
->child
;
9261 while (child_die
&& child_die
->tag
)
9263 process_die (child_die
, cu
);
9264 child_die
= sibling_die (child_die
);
9268 /* Decode macro information, if present. Dwarf 2 macro information
9269 refers to information in the line number info statement program
9270 header, so we can only read it if we've read the header
9272 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9273 if (attr
&& cu
->line_header
)
9275 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9276 complaint (&symfile_complaints
,
9277 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9279 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9283 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9284 if (attr
&& cu
->line_header
)
9286 unsigned int macro_offset
= DW_UNSND (attr
);
9288 dwarf_decode_macros (cu
, macro_offset
, 0);
9292 do_cleanups (back_to
);
9295 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9296 Create the set of symtabs used by this TU, or if this TU is sharing
9297 symtabs with another TU and the symtabs have already been created
9298 then restore those symtabs in the line header.
9299 We don't need the pc/line-number mapping for type units. */
9302 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9304 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9305 struct type_unit_group
*tu_group
;
9307 struct line_header
*lh
;
9308 struct attribute
*attr
;
9309 unsigned int i
, line_offset
;
9310 struct signatured_type
*sig_type
;
9312 gdb_assert (per_cu
->is_debug_types
);
9313 sig_type
= (struct signatured_type
*) per_cu
;
9315 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9317 /* If we're using .gdb_index (includes -readnow) then
9318 per_cu->type_unit_group may not have been set up yet. */
9319 if (sig_type
->type_unit_group
== NULL
)
9320 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9321 tu_group
= sig_type
->type_unit_group
;
9323 /* If we've already processed this stmt_list there's no real need to
9324 do it again, we could fake it and just recreate the part we need
9325 (file name,index -> symtab mapping). If data shows this optimization
9326 is useful we can do it then. */
9327 first_time
= tu_group
->compunit_symtab
== NULL
;
9329 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9334 line_offset
= DW_UNSND (attr
);
9335 lh
= dwarf_decode_line_header (line_offset
, cu
);
9340 dwarf2_start_symtab (cu
, "", NULL
, 0);
9343 gdb_assert (tu_group
->symtabs
== NULL
);
9344 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9349 cu
->line_header
= lh
;
9350 make_cleanup (free_cu_line_header
, cu
);
9354 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9356 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9357 still initializing it, and our caller (a few levels up)
9358 process_full_type_unit still needs to know if this is the first
9361 tu_group
->num_symtabs
= lh
->num_file_names
;
9362 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9364 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9366 const char *dir
= NULL
;
9367 struct file_entry
*fe
= &lh
->file_names
[i
];
9369 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9370 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9371 dwarf2_start_subfile (fe
->name
, dir
);
9373 if (current_subfile
->symtab
== NULL
)
9375 /* NOTE: start_subfile will recognize when it's been passed
9376 a file it has already seen. So we can't assume there's a
9377 simple mapping from lh->file_names to subfiles, plus
9378 lh->file_names may contain dups. */
9379 current_subfile
->symtab
9380 = allocate_symtab (cust
, current_subfile
->name
);
9383 fe
->symtab
= current_subfile
->symtab
;
9384 tu_group
->symtabs
[i
] = fe
->symtab
;
9389 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9391 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9393 struct file_entry
*fe
= &lh
->file_names
[i
];
9395 fe
->symtab
= tu_group
->symtabs
[i
];
9399 /* The main symtab is allocated last. Type units don't have DW_AT_name
9400 so they don't have a "real" (so to speak) symtab anyway.
9401 There is later code that will assign the main symtab to all symbols
9402 that don't have one. We need to handle the case of a symbol with a
9403 missing symtab (DW_AT_decl_file) anyway. */
9406 /* Process DW_TAG_type_unit.
9407 For TUs we want to skip the first top level sibling if it's not the
9408 actual type being defined by this TU. In this case the first top
9409 level sibling is there to provide context only. */
9412 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9414 struct die_info
*child_die
;
9416 prepare_one_comp_unit (cu
, die
, language_minimal
);
9418 /* Initialize (or reinitialize) the machinery for building symtabs.
9419 We do this before processing child DIEs, so that the line header table
9420 is available for DW_AT_decl_file. */
9421 setup_type_unit_groups (die
, cu
);
9423 if (die
->child
!= NULL
)
9425 child_die
= die
->child
;
9426 while (child_die
&& child_die
->tag
)
9428 process_die (child_die
, cu
);
9429 child_die
= sibling_die (child_die
);
9436 http://gcc.gnu.org/wiki/DebugFission
9437 http://gcc.gnu.org/wiki/DebugFissionDWP
9439 To simplify handling of both DWO files ("object" files with the DWARF info)
9440 and DWP files (a file with the DWOs packaged up into one file), we treat
9441 DWP files as having a collection of virtual DWO files. */
9444 hash_dwo_file (const void *item
)
9446 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9449 hash
= htab_hash_string (dwo_file
->dwo_name
);
9450 if (dwo_file
->comp_dir
!= NULL
)
9451 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9456 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9458 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9459 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9461 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9463 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9464 return lhs
->comp_dir
== rhs
->comp_dir
;
9465 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9468 /* Allocate a hash table for DWO files. */
9471 allocate_dwo_file_hash_table (void)
9473 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9475 return htab_create_alloc_ex (41,
9479 &objfile
->objfile_obstack
,
9480 hashtab_obstack_allocate
,
9481 dummy_obstack_deallocate
);
9484 /* Lookup DWO file DWO_NAME. */
9487 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9489 struct dwo_file find_entry
;
9492 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9493 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9495 memset (&find_entry
, 0, sizeof (find_entry
));
9496 find_entry
.dwo_name
= dwo_name
;
9497 find_entry
.comp_dir
= comp_dir
;
9498 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9504 hash_dwo_unit (const void *item
)
9506 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9508 /* This drops the top 32 bits of the id, but is ok for a hash. */
9509 return dwo_unit
->signature
;
9513 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9515 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9516 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9518 /* The signature is assumed to be unique within the DWO file.
9519 So while object file CU dwo_id's always have the value zero,
9520 that's OK, assuming each object file DWO file has only one CU,
9521 and that's the rule for now. */
9522 return lhs
->signature
== rhs
->signature
;
9525 /* Allocate a hash table for DWO CUs,TUs.
9526 There is one of these tables for each of CUs,TUs for each DWO file. */
9529 allocate_dwo_unit_table (struct objfile
*objfile
)
9531 /* Start out with a pretty small number.
9532 Generally DWO files contain only one CU and maybe some TUs. */
9533 return htab_create_alloc_ex (3,
9537 &objfile
->objfile_obstack
,
9538 hashtab_obstack_allocate
,
9539 dummy_obstack_deallocate
);
9542 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9544 struct create_dwo_cu_data
9546 struct dwo_file
*dwo_file
;
9547 struct dwo_unit dwo_unit
;
9550 /* die_reader_func for create_dwo_cu. */
9553 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9554 const gdb_byte
*info_ptr
,
9555 struct die_info
*comp_unit_die
,
9559 struct dwarf2_cu
*cu
= reader
->cu
;
9560 sect_offset offset
= cu
->per_cu
->offset
;
9561 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9562 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9563 struct dwo_file
*dwo_file
= data
->dwo_file
;
9564 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9565 struct attribute
*attr
;
9567 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9570 complaint (&symfile_complaints
,
9571 _("Dwarf Error: debug entry at offset 0x%x is missing"
9572 " its dwo_id [in module %s]"),
9573 offset
.sect_off
, dwo_file
->dwo_name
);
9577 dwo_unit
->dwo_file
= dwo_file
;
9578 dwo_unit
->signature
= DW_UNSND (attr
);
9579 dwo_unit
->section
= section
;
9580 dwo_unit
->offset
= offset
;
9581 dwo_unit
->length
= cu
->per_cu
->length
;
9583 if (dwarf_read_debug
)
9584 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9585 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9588 /* Create the dwo_unit for the lone CU in DWO_FILE.
9589 Note: This function processes DWO files only, not DWP files. */
9591 static struct dwo_unit
*
9592 create_dwo_cu (struct dwo_file
*dwo_file
)
9594 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9595 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9596 const gdb_byte
*info_ptr
, *end_ptr
;
9597 struct create_dwo_cu_data create_dwo_cu_data
;
9598 struct dwo_unit
*dwo_unit
;
9600 dwarf2_read_section (objfile
, section
);
9601 info_ptr
= section
->buffer
;
9603 if (info_ptr
== NULL
)
9606 if (dwarf_read_debug
)
9608 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9609 get_section_name (section
),
9610 get_section_file_name (section
));
9613 create_dwo_cu_data
.dwo_file
= dwo_file
;
9616 end_ptr
= info_ptr
+ section
->size
;
9617 while (info_ptr
< end_ptr
)
9619 struct dwarf2_per_cu_data per_cu
;
9621 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9622 sizeof (create_dwo_cu_data
.dwo_unit
));
9623 memset (&per_cu
, 0, sizeof (per_cu
));
9624 per_cu
.objfile
= objfile
;
9625 per_cu
.is_debug_types
= 0;
9626 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9627 per_cu
.section
= section
;
9629 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9630 create_dwo_cu_reader
,
9631 &create_dwo_cu_data
);
9633 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9635 /* If we've already found one, complain. We only support one
9636 because having more than one requires hacking the dwo_name of
9637 each to match, which is highly unlikely to happen. */
9638 if (dwo_unit
!= NULL
)
9640 complaint (&symfile_complaints
,
9641 _("Multiple CUs in DWO file %s [in module %s]"),
9642 dwo_file
->dwo_name
, objfile_name (objfile
));
9646 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9647 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9650 info_ptr
+= per_cu
.length
;
9656 /* DWP file .debug_{cu,tu}_index section format:
9657 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9661 Both index sections have the same format, and serve to map a 64-bit
9662 signature to a set of section numbers. Each section begins with a header,
9663 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9664 indexes, and a pool of 32-bit section numbers. The index sections will be
9665 aligned at 8-byte boundaries in the file.
9667 The index section header consists of:
9669 V, 32 bit version number
9671 N, 32 bit number of compilation units or type units in the index
9672 M, 32 bit number of slots in the hash table
9674 Numbers are recorded using the byte order of the application binary.
9676 The hash table begins at offset 16 in the section, and consists of an array
9677 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9678 order of the application binary). Unused slots in the hash table are 0.
9679 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9681 The parallel table begins immediately after the hash table
9682 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9683 array of 32-bit indexes (using the byte order of the application binary),
9684 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9685 table contains a 32-bit index into the pool of section numbers. For unused
9686 hash table slots, the corresponding entry in the parallel table will be 0.
9688 The pool of section numbers begins immediately following the hash table
9689 (at offset 16 + 12 * M from the beginning of the section). The pool of
9690 section numbers consists of an array of 32-bit words (using the byte order
9691 of the application binary). Each item in the array is indexed starting
9692 from 0. The hash table entry provides the index of the first section
9693 number in the set. Additional section numbers in the set follow, and the
9694 set is terminated by a 0 entry (section number 0 is not used in ELF).
9696 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9697 section must be the first entry in the set, and the .debug_abbrev.dwo must
9698 be the second entry. Other members of the set may follow in any order.
9704 DWP Version 2 combines all the .debug_info, etc. sections into one,
9705 and the entries in the index tables are now offsets into these sections.
9706 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9709 Index Section Contents:
9711 Hash Table of Signatures dwp_hash_table.hash_table
9712 Parallel Table of Indices dwp_hash_table.unit_table
9713 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9714 Table of Section Sizes dwp_hash_table.v2.sizes
9716 The index section header consists of:
9718 V, 32 bit version number
9719 L, 32 bit number of columns in the table of section offsets
9720 N, 32 bit number of compilation units or type units in the index
9721 M, 32 bit number of slots in the hash table
9723 Numbers are recorded using the byte order of the application binary.
9725 The hash table has the same format as version 1.
9726 The parallel table of indices has the same format as version 1,
9727 except that the entries are origin-1 indices into the table of sections
9728 offsets and the table of section sizes.
9730 The table of offsets begins immediately following the parallel table
9731 (at offset 16 + 12 * M from the beginning of the section). The table is
9732 a two-dimensional array of 32-bit words (using the byte order of the
9733 application binary), with L columns and N+1 rows, in row-major order.
9734 Each row in the array is indexed starting from 0. The first row provides
9735 a key to the remaining rows: each column in this row provides an identifier
9736 for a debug section, and the offsets in the same column of subsequent rows
9737 refer to that section. The section identifiers are:
9739 DW_SECT_INFO 1 .debug_info.dwo
9740 DW_SECT_TYPES 2 .debug_types.dwo
9741 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9742 DW_SECT_LINE 4 .debug_line.dwo
9743 DW_SECT_LOC 5 .debug_loc.dwo
9744 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9745 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9746 DW_SECT_MACRO 8 .debug_macro.dwo
9748 The offsets provided by the CU and TU index sections are the base offsets
9749 for the contributions made by each CU or TU to the corresponding section
9750 in the package file. Each CU and TU header contains an abbrev_offset
9751 field, used to find the abbreviations table for that CU or TU within the
9752 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9753 be interpreted as relative to the base offset given in the index section.
9754 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9755 should be interpreted as relative to the base offset for .debug_line.dwo,
9756 and offsets into other debug sections obtained from DWARF attributes should
9757 also be interpreted as relative to the corresponding base offset.
9759 The table of sizes begins immediately following the table of offsets.
9760 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9761 with L columns and N rows, in row-major order. Each row in the array is
9762 indexed starting from 1 (row 0 is shared by the two tables).
9766 Hash table lookup is handled the same in version 1 and 2:
9768 We assume that N and M will not exceed 2^32 - 1.
9769 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9771 Given a 64-bit compilation unit signature or a type signature S, an entry
9772 in the hash table is located as follows:
9774 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9775 the low-order k bits all set to 1.
9777 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9779 3) If the hash table entry at index H matches the signature, use that
9780 entry. If the hash table entry at index H is unused (all zeroes),
9781 terminate the search: the signature is not present in the table.
9783 4) Let H = (H + H') modulo M. Repeat at Step 3.
9785 Because M > N and H' and M are relatively prime, the search is guaranteed
9786 to stop at an unused slot or find the match. */
9788 /* Create a hash table to map DWO IDs to their CU/TU entry in
9789 .debug_{info,types}.dwo in DWP_FILE.
9790 Returns NULL if there isn't one.
9791 Note: This function processes DWP files only, not DWO files. */
9793 static struct dwp_hash_table
*
9794 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9796 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9797 bfd
*dbfd
= dwp_file
->dbfd
;
9798 const gdb_byte
*index_ptr
, *index_end
;
9799 struct dwarf2_section_info
*index
;
9800 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9801 struct dwp_hash_table
*htab
;
9804 index
= &dwp_file
->sections
.tu_index
;
9806 index
= &dwp_file
->sections
.cu_index
;
9808 if (dwarf2_section_empty_p (index
))
9810 dwarf2_read_section (objfile
, index
);
9812 index_ptr
= index
->buffer
;
9813 index_end
= index_ptr
+ index
->size
;
9815 version
= read_4_bytes (dbfd
, index_ptr
);
9818 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9822 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9824 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9827 if (version
!= 1 && version
!= 2)
9829 error (_("Dwarf Error: unsupported DWP file version (%s)"
9831 pulongest (version
), dwp_file
->name
);
9833 if (nr_slots
!= (nr_slots
& -nr_slots
))
9835 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9836 " is not power of 2 [in module %s]"),
9837 pulongest (nr_slots
), dwp_file
->name
);
9840 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9841 htab
->version
= version
;
9842 htab
->nr_columns
= nr_columns
;
9843 htab
->nr_units
= nr_units
;
9844 htab
->nr_slots
= nr_slots
;
9845 htab
->hash_table
= index_ptr
;
9846 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9848 /* Exit early if the table is empty. */
9849 if (nr_slots
== 0 || nr_units
== 0
9850 || (version
== 2 && nr_columns
== 0))
9852 /* All must be zero. */
9853 if (nr_slots
!= 0 || nr_units
!= 0
9854 || (version
== 2 && nr_columns
!= 0))
9856 complaint (&symfile_complaints
,
9857 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9858 " all zero [in modules %s]"),
9866 htab
->section_pool
.v1
.indices
=
9867 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9868 /* It's harder to decide whether the section is too small in v1.
9869 V1 is deprecated anyway so we punt. */
9873 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9874 int *ids
= htab
->section_pool
.v2
.section_ids
;
9875 /* Reverse map for error checking. */
9876 int ids_seen
[DW_SECT_MAX
+ 1];
9881 error (_("Dwarf Error: bad DWP hash table, too few columns"
9882 " in section table [in module %s]"),
9885 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9887 error (_("Dwarf Error: bad DWP hash table, too many columns"
9888 " in section table [in module %s]"),
9891 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9892 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9893 for (i
= 0; i
< nr_columns
; ++i
)
9895 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9897 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9899 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9900 " in section table [in module %s]"),
9901 id
, dwp_file
->name
);
9903 if (ids_seen
[id
] != -1)
9905 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9906 " id %d in section table [in module %s]"),
9907 id
, dwp_file
->name
);
9912 /* Must have exactly one info or types section. */
9913 if (((ids_seen
[DW_SECT_INFO
] != -1)
9914 + (ids_seen
[DW_SECT_TYPES
] != -1))
9917 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9918 " DWO info/types section [in module %s]"),
9921 /* Must have an abbrev section. */
9922 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9924 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9925 " section [in module %s]"),
9928 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9929 htab
->section_pool
.v2
.sizes
=
9930 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9931 * nr_units
* nr_columns
);
9932 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9933 * nr_units
* nr_columns
))
9936 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9945 /* Update SECTIONS with the data from SECTP.
9947 This function is like the other "locate" section routines that are
9948 passed to bfd_map_over_sections, but in this context the sections to
9949 read comes from the DWP V1 hash table, not the full ELF section table.
9951 The result is non-zero for success, or zero if an error was found. */
9954 locate_v1_virtual_dwo_sections (asection
*sectp
,
9955 struct virtual_v1_dwo_sections
*sections
)
9957 const struct dwop_section_names
*names
= &dwop_section_names
;
9959 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9961 /* There can be only one. */
9962 if (sections
->abbrev
.s
.section
!= NULL
)
9964 sections
->abbrev
.s
.section
= sectp
;
9965 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9967 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9968 || section_is_p (sectp
->name
, &names
->types_dwo
))
9970 /* There can be only one. */
9971 if (sections
->info_or_types
.s
.section
!= NULL
)
9973 sections
->info_or_types
.s
.section
= sectp
;
9974 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9976 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9978 /* There can be only one. */
9979 if (sections
->line
.s
.section
!= NULL
)
9981 sections
->line
.s
.section
= sectp
;
9982 sections
->line
.size
= bfd_get_section_size (sectp
);
9984 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9986 /* There can be only one. */
9987 if (sections
->loc
.s
.section
!= NULL
)
9989 sections
->loc
.s
.section
= sectp
;
9990 sections
->loc
.size
= bfd_get_section_size (sectp
);
9992 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9994 /* There can be only one. */
9995 if (sections
->macinfo
.s
.section
!= NULL
)
9997 sections
->macinfo
.s
.section
= sectp
;
9998 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10000 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10002 /* There can be only one. */
10003 if (sections
->macro
.s
.section
!= NULL
)
10005 sections
->macro
.s
.section
= sectp
;
10006 sections
->macro
.size
= bfd_get_section_size (sectp
);
10008 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10010 /* There can be only one. */
10011 if (sections
->str_offsets
.s
.section
!= NULL
)
10013 sections
->str_offsets
.s
.section
= sectp
;
10014 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10018 /* No other kind of section is valid. */
10025 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10026 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10027 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10028 This is for DWP version 1 files. */
10030 static struct dwo_unit
*
10031 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10032 uint32_t unit_index
,
10033 const char *comp_dir
,
10034 ULONGEST signature
, int is_debug_types
)
10036 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10037 const struct dwp_hash_table
*dwp_htab
=
10038 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10039 bfd
*dbfd
= dwp_file
->dbfd
;
10040 const char *kind
= is_debug_types
? "TU" : "CU";
10041 struct dwo_file
*dwo_file
;
10042 struct dwo_unit
*dwo_unit
;
10043 struct virtual_v1_dwo_sections sections
;
10044 void **dwo_file_slot
;
10045 char *virtual_dwo_name
;
10046 struct cleanup
*cleanups
;
10049 gdb_assert (dwp_file
->version
== 1);
10051 if (dwarf_read_debug
)
10053 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10055 pulongest (unit_index
), hex_string (signature
),
10059 /* Fetch the sections of this DWO unit.
10060 Put a limit on the number of sections we look for so that bad data
10061 doesn't cause us to loop forever. */
10063 #define MAX_NR_V1_DWO_SECTIONS \
10064 (1 /* .debug_info or .debug_types */ \
10065 + 1 /* .debug_abbrev */ \
10066 + 1 /* .debug_line */ \
10067 + 1 /* .debug_loc */ \
10068 + 1 /* .debug_str_offsets */ \
10069 + 1 /* .debug_macro or .debug_macinfo */ \
10070 + 1 /* trailing zero */)
10072 memset (§ions
, 0, sizeof (sections
));
10073 cleanups
= make_cleanup (null_cleanup
, 0);
10075 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10078 uint32_t section_nr
=
10079 read_4_bytes (dbfd
,
10080 dwp_htab
->section_pool
.v1
.indices
10081 + (unit_index
+ i
) * sizeof (uint32_t));
10083 if (section_nr
== 0)
10085 if (section_nr
>= dwp_file
->num_sections
)
10087 error (_("Dwarf Error: bad DWP hash table, section number too large"
10088 " [in module %s]"),
10092 sectp
= dwp_file
->elf_sections
[section_nr
];
10093 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10095 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10096 " [in module %s]"),
10102 || dwarf2_section_empty_p (§ions
.info_or_types
)
10103 || dwarf2_section_empty_p (§ions
.abbrev
))
10105 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10106 " [in module %s]"),
10109 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10111 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10112 " [in module %s]"),
10116 /* It's easier for the rest of the code if we fake a struct dwo_file and
10117 have dwo_unit "live" in that. At least for now.
10119 The DWP file can be made up of a random collection of CUs and TUs.
10120 However, for each CU + set of TUs that came from the same original DWO
10121 file, we can combine them back into a virtual DWO file to save space
10122 (fewer struct dwo_file objects to allocate). Remember that for really
10123 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10126 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10127 get_section_id (§ions
.abbrev
),
10128 get_section_id (§ions
.line
),
10129 get_section_id (§ions
.loc
),
10130 get_section_id (§ions
.str_offsets
));
10131 make_cleanup (xfree
, virtual_dwo_name
);
10132 /* Can we use an existing virtual DWO file? */
10133 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10134 /* Create one if necessary. */
10135 if (*dwo_file_slot
== NULL
)
10137 if (dwarf_read_debug
)
10139 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10142 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10144 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10146 strlen (virtual_dwo_name
));
10147 dwo_file
->comp_dir
= comp_dir
;
10148 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10149 dwo_file
->sections
.line
= sections
.line
;
10150 dwo_file
->sections
.loc
= sections
.loc
;
10151 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10152 dwo_file
->sections
.macro
= sections
.macro
;
10153 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10154 /* The "str" section is global to the entire DWP file. */
10155 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10156 /* The info or types section is assigned below to dwo_unit,
10157 there's no need to record it in dwo_file.
10158 Also, we can't simply record type sections in dwo_file because
10159 we record a pointer into the vector in dwo_unit. As we collect more
10160 types we'll grow the vector and eventually have to reallocate space
10161 for it, invalidating all copies of pointers into the previous
10163 *dwo_file_slot
= dwo_file
;
10167 if (dwarf_read_debug
)
10169 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10172 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10174 do_cleanups (cleanups
);
10176 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10177 dwo_unit
->dwo_file
= dwo_file
;
10178 dwo_unit
->signature
= signature
;
10179 dwo_unit
->section
=
10180 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10181 *dwo_unit
->section
= sections
.info_or_types
;
10182 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10187 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10188 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10189 piece within that section used by a TU/CU, return a virtual section
10190 of just that piece. */
10192 static struct dwarf2_section_info
10193 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10194 bfd_size_type offset
, bfd_size_type size
)
10196 struct dwarf2_section_info result
;
10199 gdb_assert (section
!= NULL
);
10200 gdb_assert (!section
->is_virtual
);
10202 memset (&result
, 0, sizeof (result
));
10203 result
.s
.containing_section
= section
;
10204 result
.is_virtual
= 1;
10209 sectp
= get_section_bfd_section (section
);
10211 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10212 bounds of the real section. This is a pretty-rare event, so just
10213 flag an error (easier) instead of a warning and trying to cope. */
10215 || offset
+ size
> bfd_get_section_size (sectp
))
10217 bfd
*abfd
= sectp
->owner
;
10219 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10220 " in section %s [in module %s]"),
10221 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10222 objfile_name (dwarf2_per_objfile
->objfile
));
10225 result
.virtual_offset
= offset
;
10226 result
.size
= size
;
10230 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10231 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10232 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10233 This is for DWP version 2 files. */
10235 static struct dwo_unit
*
10236 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10237 uint32_t unit_index
,
10238 const char *comp_dir
,
10239 ULONGEST signature
, int is_debug_types
)
10241 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10242 const struct dwp_hash_table
*dwp_htab
=
10243 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10244 bfd
*dbfd
= dwp_file
->dbfd
;
10245 const char *kind
= is_debug_types
? "TU" : "CU";
10246 struct dwo_file
*dwo_file
;
10247 struct dwo_unit
*dwo_unit
;
10248 struct virtual_v2_dwo_sections sections
;
10249 void **dwo_file_slot
;
10250 char *virtual_dwo_name
;
10251 struct cleanup
*cleanups
;
10254 gdb_assert (dwp_file
->version
== 2);
10256 if (dwarf_read_debug
)
10258 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10260 pulongest (unit_index
), hex_string (signature
),
10264 /* Fetch the section offsets of this DWO unit. */
10266 memset (§ions
, 0, sizeof (sections
));
10267 cleanups
= make_cleanup (null_cleanup
, 0);
10269 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10271 uint32_t offset
= read_4_bytes (dbfd
,
10272 dwp_htab
->section_pool
.v2
.offsets
10273 + (((unit_index
- 1) * dwp_htab
->nr_columns
10275 * sizeof (uint32_t)));
10276 uint32_t size
= read_4_bytes (dbfd
,
10277 dwp_htab
->section_pool
.v2
.sizes
10278 + (((unit_index
- 1) * dwp_htab
->nr_columns
10280 * sizeof (uint32_t)));
10282 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10285 case DW_SECT_TYPES
:
10286 sections
.info_or_types_offset
= offset
;
10287 sections
.info_or_types_size
= size
;
10289 case DW_SECT_ABBREV
:
10290 sections
.abbrev_offset
= offset
;
10291 sections
.abbrev_size
= size
;
10294 sections
.line_offset
= offset
;
10295 sections
.line_size
= size
;
10298 sections
.loc_offset
= offset
;
10299 sections
.loc_size
= size
;
10301 case DW_SECT_STR_OFFSETS
:
10302 sections
.str_offsets_offset
= offset
;
10303 sections
.str_offsets_size
= size
;
10305 case DW_SECT_MACINFO
:
10306 sections
.macinfo_offset
= offset
;
10307 sections
.macinfo_size
= size
;
10309 case DW_SECT_MACRO
:
10310 sections
.macro_offset
= offset
;
10311 sections
.macro_size
= size
;
10316 /* It's easier for the rest of the code if we fake a struct dwo_file and
10317 have dwo_unit "live" in that. At least for now.
10319 The DWP file can be made up of a random collection of CUs and TUs.
10320 However, for each CU + set of TUs that came from the same original DWO
10321 file, we can combine them back into a virtual DWO file to save space
10322 (fewer struct dwo_file objects to allocate). Remember that for really
10323 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10326 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10327 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10328 (long) (sections
.line_size
? sections
.line_offset
: 0),
10329 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10330 (long) (sections
.str_offsets_size
10331 ? sections
.str_offsets_offset
: 0));
10332 make_cleanup (xfree
, virtual_dwo_name
);
10333 /* Can we use an existing virtual DWO file? */
10334 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10335 /* Create one if necessary. */
10336 if (*dwo_file_slot
== NULL
)
10338 if (dwarf_read_debug
)
10340 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10343 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10345 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10347 strlen (virtual_dwo_name
));
10348 dwo_file
->comp_dir
= comp_dir
;
10349 dwo_file
->sections
.abbrev
=
10350 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10351 sections
.abbrev_offset
, sections
.abbrev_size
);
10352 dwo_file
->sections
.line
=
10353 create_dwp_v2_section (&dwp_file
->sections
.line
,
10354 sections
.line_offset
, sections
.line_size
);
10355 dwo_file
->sections
.loc
=
10356 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10357 sections
.loc_offset
, sections
.loc_size
);
10358 dwo_file
->sections
.macinfo
=
10359 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10360 sections
.macinfo_offset
, sections
.macinfo_size
);
10361 dwo_file
->sections
.macro
=
10362 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10363 sections
.macro_offset
, sections
.macro_size
);
10364 dwo_file
->sections
.str_offsets
=
10365 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10366 sections
.str_offsets_offset
,
10367 sections
.str_offsets_size
);
10368 /* The "str" section is global to the entire DWP file. */
10369 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10370 /* The info or types section is assigned below to dwo_unit,
10371 there's no need to record it in dwo_file.
10372 Also, we can't simply record type sections in dwo_file because
10373 we record a pointer into the vector in dwo_unit. As we collect more
10374 types we'll grow the vector and eventually have to reallocate space
10375 for it, invalidating all copies of pointers into the previous
10377 *dwo_file_slot
= dwo_file
;
10381 if (dwarf_read_debug
)
10383 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10386 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10388 do_cleanups (cleanups
);
10390 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10391 dwo_unit
->dwo_file
= dwo_file
;
10392 dwo_unit
->signature
= signature
;
10393 dwo_unit
->section
=
10394 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10395 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10396 ? &dwp_file
->sections
.types
10397 : &dwp_file
->sections
.info
,
10398 sections
.info_or_types_offset
,
10399 sections
.info_or_types_size
);
10400 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10405 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10406 Returns NULL if the signature isn't found. */
10408 static struct dwo_unit
*
10409 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10410 ULONGEST signature
, int is_debug_types
)
10412 const struct dwp_hash_table
*dwp_htab
=
10413 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10414 bfd
*dbfd
= dwp_file
->dbfd
;
10415 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10416 uint32_t hash
= signature
& mask
;
10417 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10420 struct dwo_unit find_dwo_cu
;
10422 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10423 find_dwo_cu
.signature
= signature
;
10424 slot
= htab_find_slot (is_debug_types
10425 ? dwp_file
->loaded_tus
10426 : dwp_file
->loaded_cus
,
10427 &find_dwo_cu
, INSERT
);
10430 return (struct dwo_unit
*) *slot
;
10432 /* Use a for loop so that we don't loop forever on bad debug info. */
10433 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10435 ULONGEST signature_in_table
;
10437 signature_in_table
=
10438 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10439 if (signature_in_table
== signature
)
10441 uint32_t unit_index
=
10442 read_4_bytes (dbfd
,
10443 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10445 if (dwp_file
->version
== 1)
10447 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10448 comp_dir
, signature
,
10453 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10454 comp_dir
, signature
,
10457 return (struct dwo_unit
*) *slot
;
10459 if (signature_in_table
== 0)
10461 hash
= (hash
+ hash2
) & mask
;
10464 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10465 " [in module %s]"),
10469 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10470 Open the file specified by FILE_NAME and hand it off to BFD for
10471 preliminary analysis. Return a newly initialized bfd *, which
10472 includes a canonicalized copy of FILE_NAME.
10473 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10474 SEARCH_CWD is true if the current directory is to be searched.
10475 It will be searched before debug-file-directory.
10476 If successful, the file is added to the bfd include table of the
10477 objfile's bfd (see gdb_bfd_record_inclusion).
10478 If unable to find/open the file, return NULL.
10479 NOTE: This function is derived from symfile_bfd_open. */
10482 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10486 char *absolute_name
;
10487 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10488 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10489 to debug_file_directory. */
10491 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10495 if (*debug_file_directory
!= '\0')
10496 search_path
= concat (".", dirname_separator_string
,
10497 debug_file_directory
, (char *) NULL
);
10499 search_path
= xstrdup (".");
10502 search_path
= xstrdup (debug_file_directory
);
10504 flags
= OPF_RETURN_REALPATH
;
10506 flags
|= OPF_SEARCH_IN_PATH
;
10507 desc
= openp (search_path
, flags
, file_name
,
10508 O_RDONLY
| O_BINARY
, &absolute_name
);
10509 xfree (search_path
);
10513 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10514 xfree (absolute_name
);
10515 if (sym_bfd
== NULL
)
10517 bfd_set_cacheable (sym_bfd
, 1);
10519 if (!bfd_check_format (sym_bfd
, bfd_object
))
10521 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10525 /* Success. Record the bfd as having been included by the objfile's bfd.
10526 This is important because things like demangled_names_hash lives in the
10527 objfile's per_bfd space and may have references to things like symbol
10528 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10529 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10534 /* Try to open DWO file FILE_NAME.
10535 COMP_DIR is the DW_AT_comp_dir attribute.
10536 The result is the bfd handle of the file.
10537 If there is a problem finding or opening the file, return NULL.
10538 Upon success, the canonicalized path of the file is stored in the bfd,
10539 same as symfile_bfd_open. */
10542 open_dwo_file (const char *file_name
, const char *comp_dir
)
10546 if (IS_ABSOLUTE_PATH (file_name
))
10547 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10549 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10551 if (comp_dir
!= NULL
)
10553 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10554 file_name
, (char *) NULL
);
10556 /* NOTE: If comp_dir is a relative path, this will also try the
10557 search path, which seems useful. */
10558 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10559 xfree (path_to_try
);
10564 /* That didn't work, try debug-file-directory, which, despite its name,
10565 is a list of paths. */
10567 if (*debug_file_directory
== '\0')
10570 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10573 /* This function is mapped across the sections and remembers the offset and
10574 size of each of the DWO debugging sections we are interested in. */
10577 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10579 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10580 const struct dwop_section_names
*names
= &dwop_section_names
;
10582 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10584 dwo_sections
->abbrev
.s
.section
= sectp
;
10585 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10587 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10589 dwo_sections
->info
.s
.section
= sectp
;
10590 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10592 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10594 dwo_sections
->line
.s
.section
= sectp
;
10595 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10597 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10599 dwo_sections
->loc
.s
.section
= sectp
;
10600 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10602 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10604 dwo_sections
->macinfo
.s
.section
= sectp
;
10605 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10607 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10609 dwo_sections
->macro
.s
.section
= sectp
;
10610 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10612 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10614 dwo_sections
->str
.s
.section
= sectp
;
10615 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10617 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10619 dwo_sections
->str_offsets
.s
.section
= sectp
;
10620 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10622 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10624 struct dwarf2_section_info type_section
;
10626 memset (&type_section
, 0, sizeof (type_section
));
10627 type_section
.s
.section
= sectp
;
10628 type_section
.size
= bfd_get_section_size (sectp
);
10629 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10634 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10635 by PER_CU. This is for the non-DWP case.
10636 The result is NULL if DWO_NAME can't be found. */
10638 static struct dwo_file
*
10639 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10640 const char *dwo_name
, const char *comp_dir
)
10642 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10643 struct dwo_file
*dwo_file
;
10645 struct cleanup
*cleanups
;
10647 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10650 if (dwarf_read_debug
)
10651 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10654 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10655 dwo_file
->dwo_name
= dwo_name
;
10656 dwo_file
->comp_dir
= comp_dir
;
10657 dwo_file
->dbfd
= dbfd
;
10659 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10661 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10663 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10665 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10666 dwo_file
->sections
.types
);
10668 discard_cleanups (cleanups
);
10670 if (dwarf_read_debug
)
10671 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10676 /* This function is mapped across the sections and remembers the offset and
10677 size of each of the DWP debugging sections common to version 1 and 2 that
10678 we are interested in. */
10681 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10682 void *dwp_file_ptr
)
10684 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10685 const struct dwop_section_names
*names
= &dwop_section_names
;
10686 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10688 /* Record the ELF section number for later lookup: this is what the
10689 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10690 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10691 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10693 /* Look for specific sections that we need. */
10694 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10696 dwp_file
->sections
.str
.s
.section
= sectp
;
10697 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10699 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10701 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10702 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10704 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10706 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10707 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10711 /* This function is mapped across the sections and remembers the offset and
10712 size of each of the DWP version 2 debugging sections that we are interested
10713 in. This is split into a separate function because we don't know if we
10714 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10717 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10719 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10720 const struct dwop_section_names
*names
= &dwop_section_names
;
10721 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10723 /* Record the ELF section number for later lookup: this is what the
10724 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10725 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10726 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10728 /* Look for specific sections that we need. */
10729 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10731 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10732 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10734 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10736 dwp_file
->sections
.info
.s
.section
= sectp
;
10737 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10739 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10741 dwp_file
->sections
.line
.s
.section
= sectp
;
10742 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10744 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10746 dwp_file
->sections
.loc
.s
.section
= sectp
;
10747 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10749 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10751 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
10752 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10754 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10756 dwp_file
->sections
.macro
.s
.section
= sectp
;
10757 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10759 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10761 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
10762 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10764 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10766 dwp_file
->sections
.types
.s
.section
= sectp
;
10767 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10771 /* Hash function for dwp_file loaded CUs/TUs. */
10774 hash_dwp_loaded_cutus (const void *item
)
10776 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
10778 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10779 return dwo_unit
->signature
;
10782 /* Equality function for dwp_file loaded CUs/TUs. */
10785 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10787 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
10788 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
10790 return dua
->signature
== dub
->signature
;
10793 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10796 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10798 return htab_create_alloc_ex (3,
10799 hash_dwp_loaded_cutus
,
10800 eq_dwp_loaded_cutus
,
10802 &objfile
->objfile_obstack
,
10803 hashtab_obstack_allocate
,
10804 dummy_obstack_deallocate
);
10807 /* Try to open DWP file FILE_NAME.
10808 The result is the bfd handle of the file.
10809 If there is a problem finding or opening the file, return NULL.
10810 Upon success, the canonicalized path of the file is stored in the bfd,
10811 same as symfile_bfd_open. */
10814 open_dwp_file (const char *file_name
)
10818 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10822 /* Work around upstream bug 15652.
10823 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10824 [Whether that's a "bug" is debatable, but it is getting in our way.]
10825 We have no real idea where the dwp file is, because gdb's realpath-ing
10826 of the executable's path may have discarded the needed info.
10827 [IWBN if the dwp file name was recorded in the executable, akin to
10828 .gnu_debuglink, but that doesn't exist yet.]
10829 Strip the directory from FILE_NAME and search again. */
10830 if (*debug_file_directory
!= '\0')
10832 /* Don't implicitly search the current directory here.
10833 If the user wants to search "." to handle this case,
10834 it must be added to debug-file-directory. */
10835 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10842 /* Initialize the use of the DWP file for the current objfile.
10843 By convention the name of the DWP file is ${objfile}.dwp.
10844 The result is NULL if it can't be found. */
10846 static struct dwp_file
*
10847 open_and_init_dwp_file (void)
10849 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10850 struct dwp_file
*dwp_file
;
10853 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, 0);
10855 /* Try to find first .dwp for the binary file before any symbolic links
10858 /* If the objfile is a debug file, find the name of the real binary
10859 file and get the name of dwp file from there. */
10860 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
10862 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
10863 const char *backlink_basename
= lbasename (backlink
->original_name
);
10864 char *debug_dirname
= ldirname (objfile
->original_name
);
10866 make_cleanup (xfree
, debug_dirname
);
10867 dwp_name
= xstrprintf ("%s%s%s.dwp", debug_dirname
,
10868 SLASH_STRING
, backlink_basename
);
10871 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10872 make_cleanup (xfree
, dwp_name
);
10874 dbfd
= open_dwp_file (dwp_name
);
10876 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10878 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10879 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10880 make_cleanup (xfree
, dwp_name
);
10881 dbfd
= open_dwp_file (dwp_name
);
10886 if (dwarf_read_debug
)
10887 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10888 do_cleanups (cleanups
);
10891 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10892 dwp_file
->name
= bfd_get_filename (dbfd
);
10893 dwp_file
->dbfd
= dbfd
;
10894 do_cleanups (cleanups
);
10896 /* +1: section 0 is unused */
10897 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10898 dwp_file
->elf_sections
=
10899 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10900 dwp_file
->num_sections
, asection
*);
10902 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10904 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10906 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10908 /* The DWP file version is stored in the hash table. Oh well. */
10909 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10911 /* Technically speaking, we should try to limp along, but this is
10912 pretty bizarre. We use pulongest here because that's the established
10913 portability solution (e.g, we cannot use %u for uint32_t). */
10914 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10915 " TU version %s [in DWP file %s]"),
10916 pulongest (dwp_file
->cus
->version
),
10917 pulongest (dwp_file
->tus
->version
), dwp_name
);
10919 dwp_file
->version
= dwp_file
->cus
->version
;
10921 if (dwp_file
->version
== 2)
10922 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10924 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10925 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10927 if (dwarf_read_debug
)
10929 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10930 fprintf_unfiltered (gdb_stdlog
,
10931 " %s CUs, %s TUs\n",
10932 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10933 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10939 /* Wrapper around open_and_init_dwp_file, only open it once. */
10941 static struct dwp_file
*
10942 get_dwp_file (void)
10944 if (! dwarf2_per_objfile
->dwp_checked
)
10946 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10947 dwarf2_per_objfile
->dwp_checked
= 1;
10949 return dwarf2_per_objfile
->dwp_file
;
10952 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10953 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10954 or in the DWP file for the objfile, referenced by THIS_UNIT.
10955 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10956 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10958 This is called, for example, when wanting to read a variable with a
10959 complex location. Therefore we don't want to do file i/o for every call.
10960 Therefore we don't want to look for a DWO file on every call.
10961 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10962 then we check if we've already seen DWO_NAME, and only THEN do we check
10965 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10966 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10968 static struct dwo_unit
*
10969 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10970 const char *dwo_name
, const char *comp_dir
,
10971 ULONGEST signature
, int is_debug_types
)
10973 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10974 const char *kind
= is_debug_types
? "TU" : "CU";
10975 void **dwo_file_slot
;
10976 struct dwo_file
*dwo_file
;
10977 struct dwp_file
*dwp_file
;
10979 /* First see if there's a DWP file.
10980 If we have a DWP file but didn't find the DWO inside it, don't
10981 look for the original DWO file. It makes gdb behave differently
10982 depending on whether one is debugging in the build tree. */
10984 dwp_file
= get_dwp_file ();
10985 if (dwp_file
!= NULL
)
10987 const struct dwp_hash_table
*dwp_htab
=
10988 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10990 if (dwp_htab
!= NULL
)
10992 struct dwo_unit
*dwo_cutu
=
10993 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10994 signature
, is_debug_types
);
10996 if (dwo_cutu
!= NULL
)
10998 if (dwarf_read_debug
)
11000 fprintf_unfiltered (gdb_stdlog
,
11001 "Virtual DWO %s %s found: @%s\n",
11002 kind
, hex_string (signature
),
11003 host_address_to_string (dwo_cutu
));
11011 /* No DWP file, look for the DWO file. */
11013 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
11014 if (*dwo_file_slot
== NULL
)
11016 /* Read in the file and build a table of the CUs/TUs it contains. */
11017 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
11019 /* NOTE: This will be NULL if unable to open the file. */
11020 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11022 if (dwo_file
!= NULL
)
11024 struct dwo_unit
*dwo_cutu
= NULL
;
11026 if (is_debug_types
&& dwo_file
->tus
)
11028 struct dwo_unit find_dwo_cutu
;
11030 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11031 find_dwo_cutu
.signature
= signature
;
11033 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11035 else if (!is_debug_types
&& dwo_file
->cu
)
11037 if (signature
== dwo_file
->cu
->signature
)
11038 dwo_cutu
= dwo_file
->cu
;
11041 if (dwo_cutu
!= NULL
)
11043 if (dwarf_read_debug
)
11045 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11046 kind
, dwo_name
, hex_string (signature
),
11047 host_address_to_string (dwo_cutu
));
11054 /* We didn't find it. This could mean a dwo_id mismatch, or
11055 someone deleted the DWO/DWP file, or the search path isn't set up
11056 correctly to find the file. */
11058 if (dwarf_read_debug
)
11060 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11061 kind
, dwo_name
, hex_string (signature
));
11064 /* This is a warning and not a complaint because it can be caused by
11065 pilot error (e.g., user accidentally deleting the DWO). */
11067 /* Print the name of the DWP file if we looked there, helps the user
11068 better diagnose the problem. */
11069 char *dwp_text
= NULL
;
11070 struct cleanup
*cleanups
;
11072 if (dwp_file
!= NULL
)
11073 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11074 cleanups
= make_cleanup (xfree
, dwp_text
);
11076 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11077 " [in module %s]"),
11078 kind
, dwo_name
, hex_string (signature
),
11079 dwp_text
!= NULL
? dwp_text
: "",
11080 this_unit
->is_debug_types
? "TU" : "CU",
11081 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11083 do_cleanups (cleanups
);
11088 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11089 See lookup_dwo_cutu_unit for details. */
11091 static struct dwo_unit
*
11092 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11093 const char *dwo_name
, const char *comp_dir
,
11094 ULONGEST signature
)
11096 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11099 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11100 See lookup_dwo_cutu_unit for details. */
11102 static struct dwo_unit
*
11103 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11104 const char *dwo_name
, const char *comp_dir
)
11106 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11109 /* Traversal function for queue_and_load_all_dwo_tus. */
11112 queue_and_load_dwo_tu (void **slot
, void *info
)
11114 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11115 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11116 ULONGEST signature
= dwo_unit
->signature
;
11117 struct signatured_type
*sig_type
=
11118 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11120 if (sig_type
!= NULL
)
11122 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11124 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11125 a real dependency of PER_CU on SIG_TYPE. That is detected later
11126 while processing PER_CU. */
11127 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11128 load_full_type_unit (sig_cu
);
11129 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11135 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11136 The DWO may have the only definition of the type, though it may not be
11137 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11138 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11141 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11143 struct dwo_unit
*dwo_unit
;
11144 struct dwo_file
*dwo_file
;
11146 gdb_assert (!per_cu
->is_debug_types
);
11147 gdb_assert (get_dwp_file () == NULL
);
11148 gdb_assert (per_cu
->cu
!= NULL
);
11150 dwo_unit
= per_cu
->cu
->dwo_unit
;
11151 gdb_assert (dwo_unit
!= NULL
);
11153 dwo_file
= dwo_unit
->dwo_file
;
11154 if (dwo_file
->tus
!= NULL
)
11155 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11158 /* Free all resources associated with DWO_FILE.
11159 Close the DWO file and munmap the sections.
11160 All memory should be on the objfile obstack. */
11163 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11166 /* Note: dbfd is NULL for virtual DWO files. */
11167 gdb_bfd_unref (dwo_file
->dbfd
);
11169 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11172 /* Wrapper for free_dwo_file for use in cleanups. */
11175 free_dwo_file_cleanup (void *arg
)
11177 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11178 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11180 free_dwo_file (dwo_file
, objfile
);
11183 /* Traversal function for free_dwo_files. */
11186 free_dwo_file_from_slot (void **slot
, void *info
)
11188 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11189 struct objfile
*objfile
= (struct objfile
*) info
;
11191 free_dwo_file (dwo_file
, objfile
);
11196 /* Free all resources associated with DWO_FILES. */
11199 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11201 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11204 /* Read in various DIEs. */
11206 /* qsort helper for inherit_abstract_dies. */
11209 unsigned_int_compar (const void *ap
, const void *bp
)
11211 unsigned int a
= *(unsigned int *) ap
;
11212 unsigned int b
= *(unsigned int *) bp
;
11214 return (a
> b
) - (b
> a
);
11217 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11218 Inherit only the children of the DW_AT_abstract_origin DIE not being
11219 already referenced by DW_AT_abstract_origin from the children of the
11223 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11225 struct die_info
*child_die
;
11226 unsigned die_children_count
;
11227 /* CU offsets which were referenced by children of the current DIE. */
11228 sect_offset
*offsets
;
11229 sect_offset
*offsets_end
, *offsetp
;
11230 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11231 struct die_info
*origin_die
;
11232 /* Iterator of the ORIGIN_DIE children. */
11233 struct die_info
*origin_child_die
;
11234 struct cleanup
*cleanups
;
11235 struct attribute
*attr
;
11236 struct dwarf2_cu
*origin_cu
;
11237 struct pending
**origin_previous_list_in_scope
;
11239 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11243 /* Note that following die references may follow to a die in a
11247 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11249 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11251 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11252 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11254 if (die
->tag
!= origin_die
->tag
11255 && !(die
->tag
== DW_TAG_inlined_subroutine
11256 && origin_die
->tag
== DW_TAG_subprogram
))
11257 complaint (&symfile_complaints
,
11258 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11259 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11261 child_die
= die
->child
;
11262 die_children_count
= 0;
11263 while (child_die
&& child_die
->tag
)
11265 child_die
= sibling_die (child_die
);
11266 die_children_count
++;
11268 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11269 cleanups
= make_cleanup (xfree
, offsets
);
11271 offsets_end
= offsets
;
11272 for (child_die
= die
->child
;
11273 child_die
&& child_die
->tag
;
11274 child_die
= sibling_die (child_die
))
11276 struct die_info
*child_origin_die
;
11277 struct dwarf2_cu
*child_origin_cu
;
11279 /* We are trying to process concrete instance entries:
11280 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11281 it's not relevant to our analysis here. i.e. detecting DIEs that are
11282 present in the abstract instance but not referenced in the concrete
11284 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11287 /* For each CHILD_DIE, find the corresponding child of
11288 ORIGIN_DIE. If there is more than one layer of
11289 DW_AT_abstract_origin, follow them all; there shouldn't be,
11290 but GCC versions at least through 4.4 generate this (GCC PR
11292 child_origin_die
= child_die
;
11293 child_origin_cu
= cu
;
11296 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11300 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11304 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11305 counterpart may exist. */
11306 if (child_origin_die
!= child_die
)
11308 if (child_die
->tag
!= child_origin_die
->tag
11309 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11310 && child_origin_die
->tag
== DW_TAG_subprogram
))
11311 complaint (&symfile_complaints
,
11312 _("Child DIE 0x%x and its abstract origin 0x%x have "
11313 "different tags"), child_die
->offset
.sect_off
,
11314 child_origin_die
->offset
.sect_off
);
11315 if (child_origin_die
->parent
!= origin_die
)
11316 complaint (&symfile_complaints
,
11317 _("Child DIE 0x%x and its abstract origin 0x%x have "
11318 "different parents"), child_die
->offset
.sect_off
,
11319 child_origin_die
->offset
.sect_off
);
11321 *offsets_end
++ = child_origin_die
->offset
;
11324 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11325 unsigned_int_compar
);
11326 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11327 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11328 complaint (&symfile_complaints
,
11329 _("Multiple children of DIE 0x%x refer "
11330 "to DIE 0x%x as their abstract origin"),
11331 die
->offset
.sect_off
, offsetp
->sect_off
);
11334 origin_child_die
= origin_die
->child
;
11335 while (origin_child_die
&& origin_child_die
->tag
)
11337 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11338 while (offsetp
< offsets_end
11339 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11341 if (offsetp
>= offsets_end
11342 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11344 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11345 Check whether we're already processing ORIGIN_CHILD_DIE.
11346 This can happen with mutually referenced abstract_origins.
11348 if (!origin_child_die
->in_process
)
11349 process_die (origin_child_die
, origin_cu
);
11351 origin_child_die
= sibling_die (origin_child_die
);
11353 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11355 do_cleanups (cleanups
);
11359 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11361 struct objfile
*objfile
= cu
->objfile
;
11362 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11363 struct context_stack
*newobj
;
11366 struct die_info
*child_die
;
11367 struct attribute
*attr
, *call_line
, *call_file
;
11369 CORE_ADDR baseaddr
;
11370 struct block
*block
;
11371 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11372 VEC (symbolp
) *template_args
= NULL
;
11373 struct template_symbol
*templ_func
= NULL
;
11377 /* If we do not have call site information, we can't show the
11378 caller of this inlined function. That's too confusing, so
11379 only use the scope for local variables. */
11380 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11381 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11382 if (call_line
== NULL
|| call_file
== NULL
)
11384 read_lexical_block_scope (die
, cu
);
11389 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11391 name
= dwarf2_name (die
, cu
);
11393 /* Ignore functions with missing or empty names. These are actually
11394 illegal according to the DWARF standard. */
11397 complaint (&symfile_complaints
,
11398 _("missing name for subprogram DIE at %d"),
11399 die
->offset
.sect_off
);
11403 /* Ignore functions with missing or invalid low and high pc attributes. */
11404 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
11405 <= PC_BOUNDS_INVALID
)
11407 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11408 if (!attr
|| !DW_UNSND (attr
))
11409 complaint (&symfile_complaints
,
11410 _("cannot get low and high bounds "
11411 "for subprogram DIE at %d"),
11412 die
->offset
.sect_off
);
11416 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11417 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11419 /* If we have any template arguments, then we must allocate a
11420 different sort of symbol. */
11421 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11423 if (child_die
->tag
== DW_TAG_template_type_param
11424 || child_die
->tag
== DW_TAG_template_value_param
)
11426 templ_func
= allocate_template_symbol (objfile
);
11427 templ_func
->base
.is_cplus_template_function
= 1;
11432 newobj
= push_context (0, lowpc
);
11433 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11434 (struct symbol
*) templ_func
);
11436 /* If there is a location expression for DW_AT_frame_base, record
11438 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11440 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11442 /* If there is a location for the static link, record it. */
11443 newobj
->static_link
= NULL
;
11444 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11447 newobj
->static_link
11448 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11449 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11452 cu
->list_in_scope
= &local_symbols
;
11454 if (die
->child
!= NULL
)
11456 child_die
= die
->child
;
11457 while (child_die
&& child_die
->tag
)
11459 if (child_die
->tag
== DW_TAG_template_type_param
11460 || child_die
->tag
== DW_TAG_template_value_param
)
11462 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11465 VEC_safe_push (symbolp
, template_args
, arg
);
11468 process_die (child_die
, cu
);
11469 child_die
= sibling_die (child_die
);
11473 inherit_abstract_dies (die
, cu
);
11475 /* If we have a DW_AT_specification, we might need to import using
11476 directives from the context of the specification DIE. See the
11477 comment in determine_prefix. */
11478 if (cu
->language
== language_cplus
11479 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11481 struct dwarf2_cu
*spec_cu
= cu
;
11482 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11486 child_die
= spec_die
->child
;
11487 while (child_die
&& child_die
->tag
)
11489 if (child_die
->tag
== DW_TAG_imported_module
)
11490 process_die (child_die
, spec_cu
);
11491 child_die
= sibling_die (child_die
);
11494 /* In some cases, GCC generates specification DIEs that
11495 themselves contain DW_AT_specification attributes. */
11496 spec_die
= die_specification (spec_die
, &spec_cu
);
11500 newobj
= pop_context ();
11501 /* Make a block for the local symbols within. */
11502 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11503 newobj
->static_link
, lowpc
, highpc
);
11505 /* For C++, set the block's scope. */
11506 if ((cu
->language
== language_cplus
11507 || cu
->language
== language_fortran
11508 || cu
->language
== language_d
11509 || cu
->language
== language_rust
)
11510 && cu
->processing_has_namespace_info
)
11511 block_set_scope (block
, determine_prefix (die
, cu
),
11512 &objfile
->objfile_obstack
);
11514 /* If we have address ranges, record them. */
11515 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11517 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11519 /* Attach template arguments to function. */
11520 if (! VEC_empty (symbolp
, template_args
))
11522 gdb_assert (templ_func
!= NULL
);
11524 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11525 templ_func
->template_arguments
11526 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11527 templ_func
->n_template_arguments
);
11528 memcpy (templ_func
->template_arguments
,
11529 VEC_address (symbolp
, template_args
),
11530 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11531 VEC_free (symbolp
, template_args
);
11534 /* In C++, we can have functions nested inside functions (e.g., when
11535 a function declares a class that has methods). This means that
11536 when we finish processing a function scope, we may need to go
11537 back to building a containing block's symbol lists. */
11538 local_symbols
= newobj
->locals
;
11539 local_using_directives
= newobj
->local_using_directives
;
11541 /* If we've finished processing a top-level function, subsequent
11542 symbols go in the file symbol list. */
11543 if (outermost_context_p ())
11544 cu
->list_in_scope
= &file_symbols
;
11547 /* Process all the DIES contained within a lexical block scope. Start
11548 a new scope, process the dies, and then close the scope. */
11551 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11553 struct objfile
*objfile
= cu
->objfile
;
11554 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11555 struct context_stack
*newobj
;
11556 CORE_ADDR lowpc
, highpc
;
11557 struct die_info
*child_die
;
11558 CORE_ADDR baseaddr
;
11560 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11562 /* Ignore blocks with missing or invalid low and high pc attributes. */
11563 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11564 as multiple lexical blocks? Handling children in a sane way would
11565 be nasty. Might be easier to properly extend generic blocks to
11566 describe ranges. */
11567 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11569 case PC_BOUNDS_NOT_PRESENT
:
11570 /* DW_TAG_lexical_block has no attributes, process its children as if
11571 there was no wrapping by that DW_TAG_lexical_block.
11572 GCC does no longer produces such DWARF since GCC r224161. */
11573 for (child_die
= die
->child
;
11574 child_die
!= NULL
&& child_die
->tag
;
11575 child_die
= sibling_die (child_die
))
11576 process_die (child_die
, cu
);
11578 case PC_BOUNDS_INVALID
:
11581 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11582 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11584 push_context (0, lowpc
);
11585 if (die
->child
!= NULL
)
11587 child_die
= die
->child
;
11588 while (child_die
&& child_die
->tag
)
11590 process_die (child_die
, cu
);
11591 child_die
= sibling_die (child_die
);
11594 inherit_abstract_dies (die
, cu
);
11595 newobj
= pop_context ();
11597 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11599 struct block
*block
11600 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11601 newobj
->start_addr
, highpc
);
11603 /* Note that recording ranges after traversing children, as we
11604 do here, means that recording a parent's ranges entails
11605 walking across all its children's ranges as they appear in
11606 the address map, which is quadratic behavior.
11608 It would be nicer to record the parent's ranges before
11609 traversing its children, simply overriding whatever you find
11610 there. But since we don't even decide whether to create a
11611 block until after we've traversed its children, that's hard
11613 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11615 local_symbols
= newobj
->locals
;
11616 local_using_directives
= newobj
->local_using_directives
;
11619 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11622 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11624 struct objfile
*objfile
= cu
->objfile
;
11625 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11626 CORE_ADDR pc
, baseaddr
;
11627 struct attribute
*attr
;
11628 struct call_site
*call_site
, call_site_local
;
11631 struct die_info
*child_die
;
11633 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11635 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11638 complaint (&symfile_complaints
,
11639 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11640 "DIE 0x%x [in module %s]"),
11641 die
->offset
.sect_off
, objfile_name (objfile
));
11644 pc
= attr_value_as_address (attr
) + baseaddr
;
11645 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11647 if (cu
->call_site_htab
== NULL
)
11648 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11649 NULL
, &objfile
->objfile_obstack
,
11650 hashtab_obstack_allocate
, NULL
);
11651 call_site_local
.pc
= pc
;
11652 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11655 complaint (&symfile_complaints
,
11656 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11657 "DIE 0x%x [in module %s]"),
11658 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11659 objfile_name (objfile
));
11663 /* Count parameters at the caller. */
11666 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11667 child_die
= sibling_die (child_die
))
11669 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11671 complaint (&symfile_complaints
,
11672 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11673 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11674 child_die
->tag
, child_die
->offset
.sect_off
,
11675 objfile_name (objfile
));
11683 = ((struct call_site
*)
11684 obstack_alloc (&objfile
->objfile_obstack
,
11685 sizeof (*call_site
)
11686 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11688 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11689 call_site
->pc
= pc
;
11691 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11693 struct die_info
*func_die
;
11695 /* Skip also over DW_TAG_inlined_subroutine. */
11696 for (func_die
= die
->parent
;
11697 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11698 && func_die
->tag
!= DW_TAG_subroutine_type
;
11699 func_die
= func_die
->parent
);
11701 /* DW_AT_GNU_all_call_sites is a superset
11702 of DW_AT_GNU_all_tail_call_sites. */
11704 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11705 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11707 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11708 not complete. But keep CALL_SITE for look ups via call_site_htab,
11709 both the initial caller containing the real return address PC and
11710 the final callee containing the current PC of a chain of tail
11711 calls do not need to have the tail call list complete. But any
11712 function candidate for a virtual tail call frame searched via
11713 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11714 determined unambiguously. */
11718 struct type
*func_type
= NULL
;
11721 func_type
= get_die_type (func_die
, cu
);
11722 if (func_type
!= NULL
)
11724 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11726 /* Enlist this call site to the function. */
11727 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11728 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11731 complaint (&symfile_complaints
,
11732 _("Cannot find function owning DW_TAG_GNU_call_site "
11733 "DIE 0x%x [in module %s]"),
11734 die
->offset
.sect_off
, objfile_name (objfile
));
11738 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11740 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11741 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11742 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11743 /* Keep NULL DWARF_BLOCK. */;
11744 else if (attr_form_is_block (attr
))
11746 struct dwarf2_locexpr_baton
*dlbaton
;
11748 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
11749 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11750 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11751 dlbaton
->per_cu
= cu
->per_cu
;
11753 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11755 else if (attr_form_is_ref (attr
))
11757 struct dwarf2_cu
*target_cu
= cu
;
11758 struct die_info
*target_die
;
11760 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11761 gdb_assert (target_cu
->objfile
== objfile
);
11762 if (die_is_declaration (target_die
, target_cu
))
11764 const char *target_physname
;
11766 /* Prefer the mangled name; otherwise compute the demangled one. */
11767 target_physname
= dwarf2_string_attr (target_die
,
11768 DW_AT_linkage_name
,
11770 if (target_physname
== NULL
)
11771 target_physname
= dwarf2_string_attr (target_die
,
11772 DW_AT_MIPS_linkage_name
,
11774 if (target_physname
== NULL
)
11775 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11776 if (target_physname
== NULL
)
11777 complaint (&symfile_complaints
,
11778 _("DW_AT_GNU_call_site_target target DIE has invalid "
11779 "physname, for referencing DIE 0x%x [in module %s]"),
11780 die
->offset
.sect_off
, objfile_name (objfile
));
11782 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11788 /* DW_AT_entry_pc should be preferred. */
11789 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
11790 <= PC_BOUNDS_INVALID
)
11791 complaint (&symfile_complaints
,
11792 _("DW_AT_GNU_call_site_target target DIE has invalid "
11793 "low pc, for referencing DIE 0x%x [in module %s]"),
11794 die
->offset
.sect_off
, objfile_name (objfile
));
11797 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11798 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11803 complaint (&symfile_complaints
,
11804 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11805 "block nor reference, for DIE 0x%x [in module %s]"),
11806 die
->offset
.sect_off
, objfile_name (objfile
));
11808 call_site
->per_cu
= cu
->per_cu
;
11810 for (child_die
= die
->child
;
11811 child_die
&& child_die
->tag
;
11812 child_die
= sibling_die (child_die
))
11814 struct call_site_parameter
*parameter
;
11815 struct attribute
*loc
, *origin
;
11817 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11819 /* Already printed the complaint above. */
11823 gdb_assert (call_site
->parameter_count
< nparams
);
11824 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11826 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11827 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11828 register is contained in DW_AT_GNU_call_site_value. */
11830 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11831 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11832 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11834 sect_offset offset
;
11836 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11837 offset
= dwarf2_get_ref_die_offset (origin
);
11838 if (!offset_in_cu_p (&cu
->header
, offset
))
11840 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11841 binding can be done only inside one CU. Such referenced DIE
11842 therefore cannot be even moved to DW_TAG_partial_unit. */
11843 complaint (&symfile_complaints
,
11844 _("DW_AT_abstract_origin offset is not in CU for "
11845 "DW_TAG_GNU_call_site child DIE 0x%x "
11847 child_die
->offset
.sect_off
, objfile_name (objfile
));
11850 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11851 - cu
->header
.offset
.sect_off
);
11853 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11855 complaint (&symfile_complaints
,
11856 _("No DW_FORM_block* DW_AT_location for "
11857 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11858 child_die
->offset
.sect_off
, objfile_name (objfile
));
11863 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11864 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11865 if (parameter
->u
.dwarf_reg
!= -1)
11866 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11867 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11868 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11869 ¶meter
->u
.fb_offset
))
11870 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11873 complaint (&symfile_complaints
,
11874 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11875 "for DW_FORM_block* DW_AT_location is supported for "
11876 "DW_TAG_GNU_call_site child DIE 0x%x "
11878 child_die
->offset
.sect_off
, objfile_name (objfile
));
11883 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11884 if (!attr_form_is_block (attr
))
11886 complaint (&symfile_complaints
,
11887 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11888 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11889 child_die
->offset
.sect_off
, objfile_name (objfile
));
11892 parameter
->value
= DW_BLOCK (attr
)->data
;
11893 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11895 /* Parameters are not pre-cleared by memset above. */
11896 parameter
->data_value
= NULL
;
11897 parameter
->data_value_size
= 0;
11898 call_site
->parameter_count
++;
11900 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11903 if (!attr_form_is_block (attr
))
11904 complaint (&symfile_complaints
,
11905 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11906 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11907 child_die
->offset
.sect_off
, objfile_name (objfile
));
11910 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11911 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11917 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11918 Return 1 if the attributes are present and valid, otherwise, return 0.
11919 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11922 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11923 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11924 struct partial_symtab
*ranges_pst
)
11926 struct objfile
*objfile
= cu
->objfile
;
11927 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11928 struct comp_unit_head
*cu_header
= &cu
->header
;
11929 bfd
*obfd
= objfile
->obfd
;
11930 unsigned int addr_size
= cu_header
->addr_size
;
11931 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11932 /* Base address selection entry. */
11935 unsigned int dummy
;
11936 const gdb_byte
*buffer
;
11939 CORE_ADDR high
= 0;
11940 CORE_ADDR baseaddr
;
11942 found_base
= cu
->base_known
;
11943 base
= cu
->base_address
;
11945 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11946 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11948 complaint (&symfile_complaints
,
11949 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11953 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11957 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11961 CORE_ADDR range_beginning
, range_end
;
11963 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11964 buffer
+= addr_size
;
11965 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11966 buffer
+= addr_size
;
11967 offset
+= 2 * addr_size
;
11969 /* An end of list marker is a pair of zero addresses. */
11970 if (range_beginning
== 0 && range_end
== 0)
11971 /* Found the end of list entry. */
11974 /* Each base address selection entry is a pair of 2 values.
11975 The first is the largest possible address, the second is
11976 the base address. Check for a base address here. */
11977 if ((range_beginning
& mask
) == mask
)
11979 /* If we found the largest possible address, then we already
11980 have the base address in range_end. */
11988 /* We have no valid base address for the ranges
11990 complaint (&symfile_complaints
,
11991 _("Invalid .debug_ranges data (no base address)"));
11995 if (range_beginning
> range_end
)
11997 /* Inverted range entries are invalid. */
11998 complaint (&symfile_complaints
,
11999 _("Invalid .debug_ranges data (inverted range)"));
12003 /* Empty range entries have no effect. */
12004 if (range_beginning
== range_end
)
12007 range_beginning
+= base
;
12010 /* A not-uncommon case of bad debug info.
12011 Don't pollute the addrmap with bad data. */
12012 if (range_beginning
+ baseaddr
== 0
12013 && !dwarf2_per_objfile
->has_section_at_zero
)
12015 complaint (&symfile_complaints
,
12016 _(".debug_ranges entry has start address of zero"
12017 " [in module %s]"), objfile_name (objfile
));
12021 if (ranges_pst
!= NULL
)
12026 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12027 range_beginning
+ baseaddr
);
12028 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12029 range_end
+ baseaddr
);
12030 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12034 /* FIXME: This is recording everything as a low-high
12035 segment of consecutive addresses. We should have a
12036 data structure for discontiguous block ranges
12040 low
= range_beginning
;
12046 if (range_beginning
< low
)
12047 low
= range_beginning
;
12048 if (range_end
> high
)
12054 /* If the first entry is an end-of-list marker, the range
12055 describes an empty scope, i.e. no instructions. */
12061 *high_return
= high
;
12065 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
12066 definition for the return value. *LOWPC and *HIGHPC are set iff
12067 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
12069 static enum pc_bounds_kind
12070 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12071 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12072 struct partial_symtab
*pst
)
12074 struct attribute
*attr
;
12075 struct attribute
*attr_high
;
12077 CORE_ADDR high
= 0;
12078 enum pc_bounds_kind ret
;
12080 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12083 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12086 low
= attr_value_as_address (attr
);
12087 high
= attr_value_as_address (attr_high
);
12088 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12092 /* Found high w/o low attribute. */
12093 return PC_BOUNDS_INVALID
;
12095 /* Found consecutive range of addresses. */
12096 ret
= PC_BOUNDS_HIGH_LOW
;
12100 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12103 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12104 We take advantage of the fact that DW_AT_ranges does not appear
12105 in DW_TAG_compile_unit of DWO files. */
12106 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12107 unsigned int ranges_offset
= (DW_UNSND (attr
)
12108 + (need_ranges_base
12112 /* Value of the DW_AT_ranges attribute is the offset in the
12113 .debug_ranges section. */
12114 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12115 return PC_BOUNDS_INVALID
;
12116 /* Found discontinuous range of addresses. */
12117 ret
= PC_BOUNDS_RANGES
;
12120 return PC_BOUNDS_NOT_PRESENT
;
12123 /* read_partial_die has also the strict LOW < HIGH requirement. */
12125 return PC_BOUNDS_INVALID
;
12127 /* When using the GNU linker, .gnu.linkonce. sections are used to
12128 eliminate duplicate copies of functions and vtables and such.
12129 The linker will arbitrarily choose one and discard the others.
12130 The AT_*_pc values for such functions refer to local labels in
12131 these sections. If the section from that file was discarded, the
12132 labels are not in the output, so the relocs get a value of 0.
12133 If this is a discarded function, mark the pc bounds as invalid,
12134 so that GDB will ignore it. */
12135 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12136 return PC_BOUNDS_INVALID
;
12144 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12145 its low and high PC addresses. Do nothing if these addresses could not
12146 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12147 and HIGHPC to the high address if greater than HIGHPC. */
12150 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12151 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12152 struct dwarf2_cu
*cu
)
12154 CORE_ADDR low
, high
;
12155 struct die_info
*child
= die
->child
;
12157 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
12159 *lowpc
= min (*lowpc
, low
);
12160 *highpc
= max (*highpc
, high
);
12163 /* If the language does not allow nested subprograms (either inside
12164 subprograms or lexical blocks), we're done. */
12165 if (cu
->language
!= language_ada
)
12168 /* Check all the children of the given DIE. If it contains nested
12169 subprograms, then check their pc bounds. Likewise, we need to
12170 check lexical blocks as well, as they may also contain subprogram
12172 while (child
&& child
->tag
)
12174 if (child
->tag
== DW_TAG_subprogram
12175 || child
->tag
== DW_TAG_lexical_block
)
12176 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12177 child
= sibling_die (child
);
12181 /* Get the low and high pc's represented by the scope DIE, and store
12182 them in *LOWPC and *HIGHPC. If the correct values can't be
12183 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12186 get_scope_pc_bounds (struct die_info
*die
,
12187 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12188 struct dwarf2_cu
*cu
)
12190 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12191 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12192 CORE_ADDR current_low
, current_high
;
12194 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
12195 >= PC_BOUNDS_RANGES
)
12197 best_low
= current_low
;
12198 best_high
= current_high
;
12202 struct die_info
*child
= die
->child
;
12204 while (child
&& child
->tag
)
12206 switch (child
->tag
) {
12207 case DW_TAG_subprogram
:
12208 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12210 case DW_TAG_namespace
:
12211 case DW_TAG_module
:
12212 /* FIXME: carlton/2004-01-16: Should we do this for
12213 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12214 that current GCC's always emit the DIEs corresponding
12215 to definitions of methods of classes as children of a
12216 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12217 the DIEs giving the declarations, which could be
12218 anywhere). But I don't see any reason why the
12219 standards says that they have to be there. */
12220 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12222 if (current_low
!= ((CORE_ADDR
) -1))
12224 best_low
= min (best_low
, current_low
);
12225 best_high
= max (best_high
, current_high
);
12233 child
= sibling_die (child
);
12238 *highpc
= best_high
;
12241 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12245 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12246 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12248 struct objfile
*objfile
= cu
->objfile
;
12249 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12250 struct attribute
*attr
;
12251 struct attribute
*attr_high
;
12253 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12256 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12259 CORE_ADDR low
= attr_value_as_address (attr
);
12260 CORE_ADDR high
= attr_value_as_address (attr_high
);
12262 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12265 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12266 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12267 record_block_range (block
, low
, high
- 1);
12271 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12274 bfd
*obfd
= objfile
->obfd
;
12275 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12276 We take advantage of the fact that DW_AT_ranges does not appear
12277 in DW_TAG_compile_unit of DWO files. */
12278 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12280 /* The value of the DW_AT_ranges attribute is the offset of the
12281 address range list in the .debug_ranges section. */
12282 unsigned long offset
= (DW_UNSND (attr
)
12283 + (need_ranges_base
? cu
->ranges_base
: 0));
12284 const gdb_byte
*buffer
;
12286 /* For some target architectures, but not others, the
12287 read_address function sign-extends the addresses it returns.
12288 To recognize base address selection entries, we need a
12290 unsigned int addr_size
= cu
->header
.addr_size
;
12291 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12293 /* The base address, to which the next pair is relative. Note
12294 that this 'base' is a DWARF concept: most entries in a range
12295 list are relative, to reduce the number of relocs against the
12296 debugging information. This is separate from this function's
12297 'baseaddr' argument, which GDB uses to relocate debugging
12298 information from a shared library based on the address at
12299 which the library was loaded. */
12300 CORE_ADDR base
= cu
->base_address
;
12301 int base_known
= cu
->base_known
;
12303 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12304 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12306 complaint (&symfile_complaints
,
12307 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12311 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12315 unsigned int bytes_read
;
12316 CORE_ADDR start
, end
;
12318 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12319 buffer
+= bytes_read
;
12320 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12321 buffer
+= bytes_read
;
12323 /* Did we find the end of the range list? */
12324 if (start
== 0 && end
== 0)
12327 /* Did we find a base address selection entry? */
12328 else if ((start
& base_select_mask
) == base_select_mask
)
12334 /* We found an ordinary address range. */
12339 complaint (&symfile_complaints
,
12340 _("Invalid .debug_ranges data "
12341 "(no base address)"));
12347 /* Inverted range entries are invalid. */
12348 complaint (&symfile_complaints
,
12349 _("Invalid .debug_ranges data "
12350 "(inverted range)"));
12354 /* Empty range entries have no effect. */
12358 start
+= base
+ baseaddr
;
12359 end
+= base
+ baseaddr
;
12361 /* A not-uncommon case of bad debug info.
12362 Don't pollute the addrmap with bad data. */
12363 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12365 complaint (&symfile_complaints
,
12366 _(".debug_ranges entry has start address of zero"
12367 " [in module %s]"), objfile_name (objfile
));
12371 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12372 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12373 record_block_range (block
, start
, end
- 1);
12379 /* Check whether the producer field indicates either of GCC < 4.6, or the
12380 Intel C/C++ compiler, and cache the result in CU. */
12383 check_producer (struct dwarf2_cu
*cu
)
12387 if (cu
->producer
== NULL
)
12389 /* For unknown compilers expect their behavior is DWARF version
12392 GCC started to support .debug_types sections by -gdwarf-4 since
12393 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12394 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12395 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12396 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12398 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12400 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12401 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12403 else if (startswith (cu
->producer
, "Intel(R) C"))
12404 cu
->producer_is_icc
= 1;
12407 /* For other non-GCC compilers, expect their behavior is DWARF version
12411 cu
->checked_producer
= 1;
12414 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12415 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12416 during 4.6.0 experimental. */
12419 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12421 if (!cu
->checked_producer
)
12422 check_producer (cu
);
12424 return cu
->producer_is_gxx_lt_4_6
;
12427 /* Return the default accessibility type if it is not overriden by
12428 DW_AT_accessibility. */
12430 static enum dwarf_access_attribute
12431 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12433 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12435 /* The default DWARF 2 accessibility for members is public, the default
12436 accessibility for inheritance is private. */
12438 if (die
->tag
!= DW_TAG_inheritance
)
12439 return DW_ACCESS_public
;
12441 return DW_ACCESS_private
;
12445 /* DWARF 3+ defines the default accessibility a different way. The same
12446 rules apply now for DW_TAG_inheritance as for the members and it only
12447 depends on the container kind. */
12449 if (die
->parent
->tag
== DW_TAG_class_type
)
12450 return DW_ACCESS_private
;
12452 return DW_ACCESS_public
;
12456 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12457 offset. If the attribute was not found return 0, otherwise return
12458 1. If it was found but could not properly be handled, set *OFFSET
12462 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12465 struct attribute
*attr
;
12467 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12472 /* Note that we do not check for a section offset first here.
12473 This is because DW_AT_data_member_location is new in DWARF 4,
12474 so if we see it, we can assume that a constant form is really
12475 a constant and not a section offset. */
12476 if (attr_form_is_constant (attr
))
12477 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12478 else if (attr_form_is_section_offset (attr
))
12479 dwarf2_complex_location_expr_complaint ();
12480 else if (attr_form_is_block (attr
))
12481 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12483 dwarf2_complex_location_expr_complaint ();
12491 /* Add an aggregate field to the field list. */
12494 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12495 struct dwarf2_cu
*cu
)
12497 struct objfile
*objfile
= cu
->objfile
;
12498 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12499 struct nextfield
*new_field
;
12500 struct attribute
*attr
;
12502 const char *fieldname
= "";
12504 /* Allocate a new field list entry and link it in. */
12505 new_field
= XNEW (struct nextfield
);
12506 make_cleanup (xfree
, new_field
);
12507 memset (new_field
, 0, sizeof (struct nextfield
));
12509 if (die
->tag
== DW_TAG_inheritance
)
12511 new_field
->next
= fip
->baseclasses
;
12512 fip
->baseclasses
= new_field
;
12516 new_field
->next
= fip
->fields
;
12517 fip
->fields
= new_field
;
12521 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12523 new_field
->accessibility
= DW_UNSND (attr
);
12525 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12526 if (new_field
->accessibility
!= DW_ACCESS_public
)
12527 fip
->non_public_fields
= 1;
12529 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12531 new_field
->virtuality
= DW_UNSND (attr
);
12533 new_field
->virtuality
= DW_VIRTUALITY_none
;
12535 fp
= &new_field
->field
;
12537 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12541 /* Data member other than a C++ static data member. */
12543 /* Get type of field. */
12544 fp
->type
= die_type (die
, cu
);
12546 SET_FIELD_BITPOS (*fp
, 0);
12548 /* Get bit size of field (zero if none). */
12549 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12552 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12556 FIELD_BITSIZE (*fp
) = 0;
12559 /* Get bit offset of field. */
12560 if (handle_data_member_location (die
, cu
, &offset
))
12561 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12562 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12565 if (gdbarch_bits_big_endian (gdbarch
))
12567 /* For big endian bits, the DW_AT_bit_offset gives the
12568 additional bit offset from the MSB of the containing
12569 anonymous object to the MSB of the field. We don't
12570 have to do anything special since we don't need to
12571 know the size of the anonymous object. */
12572 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12576 /* For little endian bits, compute the bit offset to the
12577 MSB of the anonymous object, subtract off the number of
12578 bits from the MSB of the field to the MSB of the
12579 object, and then subtract off the number of bits of
12580 the field itself. The result is the bit offset of
12581 the LSB of the field. */
12582 int anonymous_size
;
12583 int bit_offset
= DW_UNSND (attr
);
12585 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12588 /* The size of the anonymous object containing
12589 the bit field is explicit, so use the
12590 indicated size (in bytes). */
12591 anonymous_size
= DW_UNSND (attr
);
12595 /* The size of the anonymous object containing
12596 the bit field must be inferred from the type
12597 attribute of the data member containing the
12599 anonymous_size
= TYPE_LENGTH (fp
->type
);
12601 SET_FIELD_BITPOS (*fp
,
12602 (FIELD_BITPOS (*fp
)
12603 + anonymous_size
* bits_per_byte
12604 - bit_offset
- FIELD_BITSIZE (*fp
)));
12608 /* Get name of field. */
12609 fieldname
= dwarf2_name (die
, cu
);
12610 if (fieldname
== NULL
)
12613 /* The name is already allocated along with this objfile, so we don't
12614 need to duplicate it for the type. */
12615 fp
->name
= fieldname
;
12617 /* Change accessibility for artificial fields (e.g. virtual table
12618 pointer or virtual base class pointer) to private. */
12619 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12621 FIELD_ARTIFICIAL (*fp
) = 1;
12622 new_field
->accessibility
= DW_ACCESS_private
;
12623 fip
->non_public_fields
= 1;
12626 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12628 /* C++ static member. */
12630 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12631 is a declaration, but all versions of G++ as of this writing
12632 (so through at least 3.2.1) incorrectly generate
12633 DW_TAG_variable tags. */
12635 const char *physname
;
12637 /* Get name of field. */
12638 fieldname
= dwarf2_name (die
, cu
);
12639 if (fieldname
== NULL
)
12642 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12644 /* Only create a symbol if this is an external value.
12645 new_symbol checks this and puts the value in the global symbol
12646 table, which we want. If it is not external, new_symbol
12647 will try to put the value in cu->list_in_scope which is wrong. */
12648 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12650 /* A static const member, not much different than an enum as far as
12651 we're concerned, except that we can support more types. */
12652 new_symbol (die
, NULL
, cu
);
12655 /* Get physical name. */
12656 physname
= dwarf2_physname (fieldname
, die
, cu
);
12658 /* The name is already allocated along with this objfile, so we don't
12659 need to duplicate it for the type. */
12660 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12661 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12662 FIELD_NAME (*fp
) = fieldname
;
12664 else if (die
->tag
== DW_TAG_inheritance
)
12668 /* C++ base class field. */
12669 if (handle_data_member_location (die
, cu
, &offset
))
12670 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12671 FIELD_BITSIZE (*fp
) = 0;
12672 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12673 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12674 fip
->nbaseclasses
++;
12678 /* Add a typedef defined in the scope of the FIP's class. */
12681 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12682 struct dwarf2_cu
*cu
)
12684 struct typedef_field_list
*new_field
;
12685 struct typedef_field
*fp
;
12687 /* Allocate a new field list entry and link it in. */
12688 new_field
= XCNEW (struct typedef_field_list
);
12689 make_cleanup (xfree
, new_field
);
12691 gdb_assert (die
->tag
== DW_TAG_typedef
);
12693 fp
= &new_field
->field
;
12695 /* Get name of field. */
12696 fp
->name
= dwarf2_name (die
, cu
);
12697 if (fp
->name
== NULL
)
12700 fp
->type
= read_type_die (die
, cu
);
12702 new_field
->next
= fip
->typedef_field_list
;
12703 fip
->typedef_field_list
= new_field
;
12704 fip
->typedef_field_list_count
++;
12707 /* Create the vector of fields, and attach it to the type. */
12710 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12711 struct dwarf2_cu
*cu
)
12713 int nfields
= fip
->nfields
;
12715 /* Record the field count, allocate space for the array of fields,
12716 and create blank accessibility bitfields if necessary. */
12717 TYPE_NFIELDS (type
) = nfields
;
12718 TYPE_FIELDS (type
) = (struct field
*)
12719 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12720 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12722 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12724 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12726 TYPE_FIELD_PRIVATE_BITS (type
) =
12727 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12728 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12730 TYPE_FIELD_PROTECTED_BITS (type
) =
12731 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12732 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12734 TYPE_FIELD_IGNORE_BITS (type
) =
12735 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12736 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12739 /* If the type has baseclasses, allocate and clear a bit vector for
12740 TYPE_FIELD_VIRTUAL_BITS. */
12741 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12743 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12744 unsigned char *pointer
;
12746 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12747 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
12748 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12749 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12750 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12753 /* Copy the saved-up fields into the field vector. Start from the head of
12754 the list, adding to the tail of the field array, so that they end up in
12755 the same order in the array in which they were added to the list. */
12756 while (nfields
-- > 0)
12758 struct nextfield
*fieldp
;
12762 fieldp
= fip
->fields
;
12763 fip
->fields
= fieldp
->next
;
12767 fieldp
= fip
->baseclasses
;
12768 fip
->baseclasses
= fieldp
->next
;
12771 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12772 switch (fieldp
->accessibility
)
12774 case DW_ACCESS_private
:
12775 if (cu
->language
!= language_ada
)
12776 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12779 case DW_ACCESS_protected
:
12780 if (cu
->language
!= language_ada
)
12781 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12784 case DW_ACCESS_public
:
12788 /* Unknown accessibility. Complain and treat it as public. */
12790 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12791 fieldp
->accessibility
);
12795 if (nfields
< fip
->nbaseclasses
)
12797 switch (fieldp
->virtuality
)
12799 case DW_VIRTUALITY_virtual
:
12800 case DW_VIRTUALITY_pure_virtual
:
12801 if (cu
->language
== language_ada
)
12802 error (_("unexpected virtuality in component of Ada type"));
12803 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12810 /* Return true if this member function is a constructor, false
12814 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12816 const char *fieldname
;
12817 const char *type_name
;
12820 if (die
->parent
== NULL
)
12823 if (die
->parent
->tag
!= DW_TAG_structure_type
12824 && die
->parent
->tag
!= DW_TAG_union_type
12825 && die
->parent
->tag
!= DW_TAG_class_type
)
12828 fieldname
= dwarf2_name (die
, cu
);
12829 type_name
= dwarf2_name (die
->parent
, cu
);
12830 if (fieldname
== NULL
|| type_name
== NULL
)
12833 len
= strlen (fieldname
);
12834 return (strncmp (fieldname
, type_name
, len
) == 0
12835 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12838 /* Add a member function to the proper fieldlist. */
12841 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12842 struct type
*type
, struct dwarf2_cu
*cu
)
12844 struct objfile
*objfile
= cu
->objfile
;
12845 struct attribute
*attr
;
12846 struct fnfieldlist
*flp
;
12848 struct fn_field
*fnp
;
12849 const char *fieldname
;
12850 struct nextfnfield
*new_fnfield
;
12851 struct type
*this_type
;
12852 enum dwarf_access_attribute accessibility
;
12854 if (cu
->language
== language_ada
)
12855 error (_("unexpected member function in Ada type"));
12857 /* Get name of member function. */
12858 fieldname
= dwarf2_name (die
, cu
);
12859 if (fieldname
== NULL
)
12862 /* Look up member function name in fieldlist. */
12863 for (i
= 0; i
< fip
->nfnfields
; i
++)
12865 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12869 /* Create new list element if necessary. */
12870 if (i
< fip
->nfnfields
)
12871 flp
= &fip
->fnfieldlists
[i
];
12874 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12876 fip
->fnfieldlists
= (struct fnfieldlist
*)
12877 xrealloc (fip
->fnfieldlists
,
12878 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12879 * sizeof (struct fnfieldlist
));
12880 if (fip
->nfnfields
== 0)
12881 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12883 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12884 flp
->name
= fieldname
;
12887 i
= fip
->nfnfields
++;
12890 /* Create a new member function field and chain it to the field list
12892 new_fnfield
= XNEW (struct nextfnfield
);
12893 make_cleanup (xfree
, new_fnfield
);
12894 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12895 new_fnfield
->next
= flp
->head
;
12896 flp
->head
= new_fnfield
;
12899 /* Fill in the member function field info. */
12900 fnp
= &new_fnfield
->fnfield
;
12902 /* Delay processing of the physname until later. */
12903 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12905 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12910 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12911 fnp
->physname
= physname
? physname
: "";
12914 fnp
->type
= alloc_type (objfile
);
12915 this_type
= read_type_die (die
, cu
);
12916 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12918 int nparams
= TYPE_NFIELDS (this_type
);
12920 /* TYPE is the domain of this method, and THIS_TYPE is the type
12921 of the method itself (TYPE_CODE_METHOD). */
12922 smash_to_method_type (fnp
->type
, type
,
12923 TYPE_TARGET_TYPE (this_type
),
12924 TYPE_FIELDS (this_type
),
12925 TYPE_NFIELDS (this_type
),
12926 TYPE_VARARGS (this_type
));
12928 /* Handle static member functions.
12929 Dwarf2 has no clean way to discern C++ static and non-static
12930 member functions. G++ helps GDB by marking the first
12931 parameter for non-static member functions (which is the this
12932 pointer) as artificial. We obtain this information from
12933 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12934 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12935 fnp
->voffset
= VOFFSET_STATIC
;
12938 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12939 dwarf2_full_name (fieldname
, die
, cu
));
12941 /* Get fcontext from DW_AT_containing_type if present. */
12942 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12943 fnp
->fcontext
= die_containing_type (die
, cu
);
12945 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12946 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12948 /* Get accessibility. */
12949 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12951 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12953 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12954 switch (accessibility
)
12956 case DW_ACCESS_private
:
12957 fnp
->is_private
= 1;
12959 case DW_ACCESS_protected
:
12960 fnp
->is_protected
= 1;
12964 /* Check for artificial methods. */
12965 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12966 if (attr
&& DW_UNSND (attr
) != 0)
12967 fnp
->is_artificial
= 1;
12969 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12971 /* Get index in virtual function table if it is a virtual member
12972 function. For older versions of GCC, this is an offset in the
12973 appropriate virtual table, as specified by DW_AT_containing_type.
12974 For everyone else, it is an expression to be evaluated relative
12975 to the object address. */
12977 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12980 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12982 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12984 /* Old-style GCC. */
12985 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12987 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12988 || (DW_BLOCK (attr
)->size
> 1
12989 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12990 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12992 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12993 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12994 dwarf2_complex_location_expr_complaint ();
12996 fnp
->voffset
/= cu
->header
.addr_size
;
13000 dwarf2_complex_location_expr_complaint ();
13002 if (!fnp
->fcontext
)
13004 /* If there is no `this' field and no DW_AT_containing_type,
13005 we cannot actually find a base class context for the
13007 if (TYPE_NFIELDS (this_type
) == 0
13008 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
13010 complaint (&symfile_complaints
,
13011 _("cannot determine context for virtual member "
13012 "function \"%s\" (offset %d)"),
13013 fieldname
, die
->offset
.sect_off
);
13018 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
13022 else if (attr_form_is_section_offset (attr
))
13024 dwarf2_complex_location_expr_complaint ();
13028 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13034 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13035 if (attr
&& DW_UNSND (attr
))
13037 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13038 complaint (&symfile_complaints
,
13039 _("Member function \"%s\" (offset %d) is virtual "
13040 "but the vtable offset is not specified"),
13041 fieldname
, die
->offset
.sect_off
);
13042 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13043 TYPE_CPLUS_DYNAMIC (type
) = 1;
13048 /* Create the vector of member function fields, and attach it to the type. */
13051 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13052 struct dwarf2_cu
*cu
)
13054 struct fnfieldlist
*flp
;
13057 if (cu
->language
== language_ada
)
13058 error (_("unexpected member functions in Ada type"));
13060 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13061 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13062 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13064 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13066 struct nextfnfield
*nfp
= flp
->head
;
13067 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13070 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13071 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13072 fn_flp
->fn_fields
= (struct fn_field
*)
13073 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13074 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13075 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13078 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13081 /* Returns non-zero if NAME is the name of a vtable member in CU's
13082 language, zero otherwise. */
13084 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13086 static const char vptr
[] = "_vptr";
13087 static const char vtable
[] = "vtable";
13089 /* Look for the C++ and Java forms of the vtable. */
13090 if ((cu
->language
== language_java
13091 && startswith (name
, vtable
))
13092 || (startswith (name
, vptr
)
13093 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13099 /* GCC outputs unnamed structures that are really pointers to member
13100 functions, with the ABI-specified layout. If TYPE describes
13101 such a structure, smash it into a member function type.
13103 GCC shouldn't do this; it should just output pointer to member DIEs.
13104 This is GCC PR debug/28767. */
13107 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13109 struct type
*pfn_type
, *self_type
, *new_type
;
13111 /* Check for a structure with no name and two children. */
13112 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13115 /* Check for __pfn and __delta members. */
13116 if (TYPE_FIELD_NAME (type
, 0) == NULL
13117 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13118 || TYPE_FIELD_NAME (type
, 1) == NULL
13119 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13122 /* Find the type of the method. */
13123 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13124 if (pfn_type
== NULL
13125 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13126 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13129 /* Look for the "this" argument. */
13130 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13131 if (TYPE_NFIELDS (pfn_type
) == 0
13132 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13133 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13136 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13137 new_type
= alloc_type (objfile
);
13138 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13139 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13140 TYPE_VARARGS (pfn_type
));
13141 smash_to_methodptr_type (type
, new_type
);
13144 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13148 producer_is_icc (struct dwarf2_cu
*cu
)
13150 if (!cu
->checked_producer
)
13151 check_producer (cu
);
13153 return cu
->producer_is_icc
;
13156 /* Called when we find the DIE that starts a structure or union scope
13157 (definition) to create a type for the structure or union. Fill in
13158 the type's name and general properties; the members will not be
13159 processed until process_structure_scope. A symbol table entry for
13160 the type will also not be done until process_structure_scope (assuming
13161 the type has a name).
13163 NOTE: we need to call these functions regardless of whether or not the
13164 DIE has a DW_AT_name attribute, since it might be an anonymous
13165 structure or union. This gets the type entered into our set of
13166 user defined types. */
13168 static struct type
*
13169 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13171 struct objfile
*objfile
= cu
->objfile
;
13173 struct attribute
*attr
;
13176 /* If the definition of this type lives in .debug_types, read that type.
13177 Don't follow DW_AT_specification though, that will take us back up
13178 the chain and we want to go down. */
13179 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13182 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13184 /* The type's CU may not be the same as CU.
13185 Ensure TYPE is recorded with CU in die_type_hash. */
13186 return set_die_type (die
, type
, cu
);
13189 type
= alloc_type (objfile
);
13190 INIT_CPLUS_SPECIFIC (type
);
13192 name
= dwarf2_name (die
, cu
);
13195 if (cu
->language
== language_cplus
13196 || cu
->language
== language_java
13197 || cu
->language
== language_d
13198 || cu
->language
== language_rust
)
13200 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13202 /* dwarf2_full_name might have already finished building the DIE's
13203 type. If so, there is no need to continue. */
13204 if (get_die_type (die
, cu
) != NULL
)
13205 return get_die_type (die
, cu
);
13207 TYPE_TAG_NAME (type
) = full_name
;
13208 if (die
->tag
== DW_TAG_structure_type
13209 || die
->tag
== DW_TAG_class_type
)
13210 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13214 /* The name is already allocated along with this objfile, so
13215 we don't need to duplicate it for the type. */
13216 TYPE_TAG_NAME (type
) = name
;
13217 if (die
->tag
== DW_TAG_class_type
)
13218 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13222 if (die
->tag
== DW_TAG_structure_type
)
13224 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13226 else if (die
->tag
== DW_TAG_union_type
)
13228 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13232 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13235 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13236 TYPE_DECLARED_CLASS (type
) = 1;
13238 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13241 if (attr_form_is_constant (attr
))
13242 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13245 /* For the moment, dynamic type sizes are not supported
13246 by GDB's struct type. The actual size is determined
13247 on-demand when resolving the type of a given object,
13248 so set the type's length to zero for now. Otherwise,
13249 we record an expression as the length, and that expression
13250 could lead to a very large value, which could eventually
13251 lead to us trying to allocate that much memory when creating
13252 a value of that type. */
13253 TYPE_LENGTH (type
) = 0;
13258 TYPE_LENGTH (type
) = 0;
13261 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13263 /* ICC does not output the required DW_AT_declaration
13264 on incomplete types, but gives them a size of zero. */
13265 TYPE_STUB (type
) = 1;
13268 TYPE_STUB_SUPPORTED (type
) = 1;
13270 if (die_is_declaration (die
, cu
))
13271 TYPE_STUB (type
) = 1;
13272 else if (attr
== NULL
&& die
->child
== NULL
13273 && producer_is_realview (cu
->producer
))
13274 /* RealView does not output the required DW_AT_declaration
13275 on incomplete types. */
13276 TYPE_STUB (type
) = 1;
13278 /* We need to add the type field to the die immediately so we don't
13279 infinitely recurse when dealing with pointers to the structure
13280 type within the structure itself. */
13281 set_die_type (die
, type
, cu
);
13283 /* set_die_type should be already done. */
13284 set_descriptive_type (type
, die
, cu
);
13289 /* Finish creating a structure or union type, including filling in
13290 its members and creating a symbol for it. */
13293 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13295 struct objfile
*objfile
= cu
->objfile
;
13296 struct die_info
*child_die
;
13299 type
= get_die_type (die
, cu
);
13301 type
= read_structure_type (die
, cu
);
13303 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13305 struct field_info fi
;
13306 VEC (symbolp
) *template_args
= NULL
;
13307 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13309 memset (&fi
, 0, sizeof (struct field_info
));
13311 child_die
= die
->child
;
13313 while (child_die
&& child_die
->tag
)
13315 if (child_die
->tag
== DW_TAG_member
13316 || child_die
->tag
== DW_TAG_variable
)
13318 /* NOTE: carlton/2002-11-05: A C++ static data member
13319 should be a DW_TAG_member that is a declaration, but
13320 all versions of G++ as of this writing (so through at
13321 least 3.2.1) incorrectly generate DW_TAG_variable
13322 tags for them instead. */
13323 dwarf2_add_field (&fi
, child_die
, cu
);
13325 else if (child_die
->tag
== DW_TAG_subprogram
)
13327 /* Rust doesn't have member functions in the C++ sense.
13328 However, it does emit ordinary functions as children
13329 of a struct DIE. */
13330 if (cu
->language
== language_rust
)
13331 read_func_scope (child_die
, cu
);
13334 /* C++ member function. */
13335 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13338 else if (child_die
->tag
== DW_TAG_inheritance
)
13340 /* C++ base class field. */
13341 dwarf2_add_field (&fi
, child_die
, cu
);
13343 else if (child_die
->tag
== DW_TAG_typedef
)
13344 dwarf2_add_typedef (&fi
, child_die
, cu
);
13345 else if (child_die
->tag
== DW_TAG_template_type_param
13346 || child_die
->tag
== DW_TAG_template_value_param
)
13348 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13351 VEC_safe_push (symbolp
, template_args
, arg
);
13354 child_die
= sibling_die (child_die
);
13357 /* Attach template arguments to type. */
13358 if (! VEC_empty (symbolp
, template_args
))
13360 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13361 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13362 = VEC_length (symbolp
, template_args
);
13363 TYPE_TEMPLATE_ARGUMENTS (type
)
13364 = XOBNEWVEC (&objfile
->objfile_obstack
,
13366 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13367 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13368 VEC_address (symbolp
, template_args
),
13369 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13370 * sizeof (struct symbol
*)));
13371 VEC_free (symbolp
, template_args
);
13374 /* Attach fields and member functions to the type. */
13376 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13379 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13381 /* Get the type which refers to the base class (possibly this
13382 class itself) which contains the vtable pointer for the current
13383 class from the DW_AT_containing_type attribute. This use of
13384 DW_AT_containing_type is a GNU extension. */
13386 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13388 struct type
*t
= die_containing_type (die
, cu
);
13390 set_type_vptr_basetype (type
, t
);
13395 /* Our own class provides vtbl ptr. */
13396 for (i
= TYPE_NFIELDS (t
) - 1;
13397 i
>= TYPE_N_BASECLASSES (t
);
13400 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13402 if (is_vtable_name (fieldname
, cu
))
13404 set_type_vptr_fieldno (type
, i
);
13409 /* Complain if virtual function table field not found. */
13410 if (i
< TYPE_N_BASECLASSES (t
))
13411 complaint (&symfile_complaints
,
13412 _("virtual function table pointer "
13413 "not found when defining class '%s'"),
13414 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13419 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13422 else if (cu
->producer
13423 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13425 /* The IBM XLC compiler does not provide direct indication
13426 of the containing type, but the vtable pointer is
13427 always named __vfp. */
13431 for (i
= TYPE_NFIELDS (type
) - 1;
13432 i
>= TYPE_N_BASECLASSES (type
);
13435 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13437 set_type_vptr_fieldno (type
, i
);
13438 set_type_vptr_basetype (type
, type
);
13445 /* Copy fi.typedef_field_list linked list elements content into the
13446 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13447 if (fi
.typedef_field_list
)
13449 int i
= fi
.typedef_field_list_count
;
13451 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13452 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13453 = ((struct typedef_field
*)
13454 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13455 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13457 /* Reverse the list order to keep the debug info elements order. */
13460 struct typedef_field
*dest
, *src
;
13462 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13463 src
= &fi
.typedef_field_list
->field
;
13464 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13469 do_cleanups (back_to
);
13471 if (HAVE_CPLUS_STRUCT (type
))
13472 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13475 quirk_gcc_member_function_pointer (type
, objfile
);
13477 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13478 snapshots) has been known to create a die giving a declaration
13479 for a class that has, as a child, a die giving a definition for a
13480 nested class. So we have to process our children even if the
13481 current die is a declaration. Normally, of course, a declaration
13482 won't have any children at all. */
13484 child_die
= die
->child
;
13486 while (child_die
!= NULL
&& child_die
->tag
)
13488 if (child_die
->tag
== DW_TAG_member
13489 || child_die
->tag
== DW_TAG_variable
13490 || child_die
->tag
== DW_TAG_inheritance
13491 || child_die
->tag
== DW_TAG_template_value_param
13492 || child_die
->tag
== DW_TAG_template_type_param
)
13497 process_die (child_die
, cu
);
13499 child_die
= sibling_die (child_die
);
13502 /* Do not consider external references. According to the DWARF standard,
13503 these DIEs are identified by the fact that they have no byte_size
13504 attribute, and a declaration attribute. */
13505 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13506 || !die_is_declaration (die
, cu
))
13507 new_symbol (die
, type
, cu
);
13510 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13511 update TYPE using some information only available in DIE's children. */
13514 update_enumeration_type_from_children (struct die_info
*die
,
13516 struct dwarf2_cu
*cu
)
13518 struct obstack obstack
;
13519 struct die_info
*child_die
;
13520 int unsigned_enum
= 1;
13523 struct cleanup
*old_chain
;
13525 obstack_init (&obstack
);
13526 old_chain
= make_cleanup_obstack_free (&obstack
);
13528 for (child_die
= die
->child
;
13529 child_die
!= NULL
&& child_die
->tag
;
13530 child_die
= sibling_die (child_die
))
13532 struct attribute
*attr
;
13534 const gdb_byte
*bytes
;
13535 struct dwarf2_locexpr_baton
*baton
;
13538 if (child_die
->tag
!= DW_TAG_enumerator
)
13541 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13545 name
= dwarf2_name (child_die
, cu
);
13547 name
= "<anonymous enumerator>";
13549 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13550 &value
, &bytes
, &baton
);
13556 else if ((mask
& value
) != 0)
13561 /* If we already know that the enum type is neither unsigned, nor
13562 a flag type, no need to look at the rest of the enumerates. */
13563 if (!unsigned_enum
&& !flag_enum
)
13568 TYPE_UNSIGNED (type
) = 1;
13570 TYPE_FLAG_ENUM (type
) = 1;
13572 do_cleanups (old_chain
);
13575 /* Given a DW_AT_enumeration_type die, set its type. We do not
13576 complete the type's fields yet, or create any symbols. */
13578 static struct type
*
13579 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13581 struct objfile
*objfile
= cu
->objfile
;
13583 struct attribute
*attr
;
13586 /* If the definition of this type lives in .debug_types, read that type.
13587 Don't follow DW_AT_specification though, that will take us back up
13588 the chain and we want to go down. */
13589 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13592 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13594 /* The type's CU may not be the same as CU.
13595 Ensure TYPE is recorded with CU in die_type_hash. */
13596 return set_die_type (die
, type
, cu
);
13599 type
= alloc_type (objfile
);
13601 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13602 name
= dwarf2_full_name (NULL
, die
, cu
);
13604 TYPE_TAG_NAME (type
) = name
;
13606 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13609 struct type
*underlying_type
= die_type (die
, cu
);
13611 TYPE_TARGET_TYPE (type
) = underlying_type
;
13614 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13617 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13621 TYPE_LENGTH (type
) = 0;
13624 /* The enumeration DIE can be incomplete. In Ada, any type can be
13625 declared as private in the package spec, and then defined only
13626 inside the package body. Such types are known as Taft Amendment
13627 Types. When another package uses such a type, an incomplete DIE
13628 may be generated by the compiler. */
13629 if (die_is_declaration (die
, cu
))
13630 TYPE_STUB (type
) = 1;
13632 /* Finish the creation of this type by using the enum's children.
13633 We must call this even when the underlying type has been provided
13634 so that we can determine if we're looking at a "flag" enum. */
13635 update_enumeration_type_from_children (die
, type
, cu
);
13637 /* If this type has an underlying type that is not a stub, then we
13638 may use its attributes. We always use the "unsigned" attribute
13639 in this situation, because ordinarily we guess whether the type
13640 is unsigned -- but the guess can be wrong and the underlying type
13641 can tell us the reality. However, we defer to a local size
13642 attribute if one exists, because this lets the compiler override
13643 the underlying type if needed. */
13644 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13646 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13647 if (TYPE_LENGTH (type
) == 0)
13648 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13651 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13653 return set_die_type (die
, type
, cu
);
13656 /* Given a pointer to a die which begins an enumeration, process all
13657 the dies that define the members of the enumeration, and create the
13658 symbol for the enumeration type.
13660 NOTE: We reverse the order of the element list. */
13663 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13665 struct type
*this_type
;
13667 this_type
= get_die_type (die
, cu
);
13668 if (this_type
== NULL
)
13669 this_type
= read_enumeration_type (die
, cu
);
13671 if (die
->child
!= NULL
)
13673 struct die_info
*child_die
;
13674 struct symbol
*sym
;
13675 struct field
*fields
= NULL
;
13676 int num_fields
= 0;
13679 child_die
= die
->child
;
13680 while (child_die
&& child_die
->tag
)
13682 if (child_die
->tag
!= DW_TAG_enumerator
)
13684 process_die (child_die
, cu
);
13688 name
= dwarf2_name (child_die
, cu
);
13691 sym
= new_symbol (child_die
, this_type
, cu
);
13693 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13695 fields
= (struct field
*)
13697 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13698 * sizeof (struct field
));
13701 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13702 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13703 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13704 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13710 child_die
= sibling_die (child_die
);
13715 TYPE_NFIELDS (this_type
) = num_fields
;
13716 TYPE_FIELDS (this_type
) = (struct field
*)
13717 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13718 memcpy (TYPE_FIELDS (this_type
), fields
,
13719 sizeof (struct field
) * num_fields
);
13724 /* If we are reading an enum from a .debug_types unit, and the enum
13725 is a declaration, and the enum is not the signatured type in the
13726 unit, then we do not want to add a symbol for it. Adding a
13727 symbol would in some cases obscure the true definition of the
13728 enum, giving users an incomplete type when the definition is
13729 actually available. Note that we do not want to do this for all
13730 enums which are just declarations, because C++0x allows forward
13731 enum declarations. */
13732 if (cu
->per_cu
->is_debug_types
13733 && die_is_declaration (die
, cu
))
13735 struct signatured_type
*sig_type
;
13737 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13738 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13739 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13743 new_symbol (die
, this_type
, cu
);
13746 /* Extract all information from a DW_TAG_array_type DIE and put it in
13747 the DIE's type field. For now, this only handles one dimensional
13750 static struct type
*
13751 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13753 struct objfile
*objfile
= cu
->objfile
;
13754 struct die_info
*child_die
;
13756 struct type
*element_type
, *range_type
, *index_type
;
13757 struct type
**range_types
= NULL
;
13758 struct attribute
*attr
;
13760 struct cleanup
*back_to
;
13762 unsigned int bit_stride
= 0;
13764 element_type
= die_type (die
, cu
);
13766 /* The die_type call above may have already set the type for this DIE. */
13767 type
= get_die_type (die
, cu
);
13771 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13773 bit_stride
= DW_UNSND (attr
) * 8;
13775 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13777 bit_stride
= DW_UNSND (attr
);
13779 /* Irix 6.2 native cc creates array types without children for
13780 arrays with unspecified length. */
13781 if (die
->child
== NULL
)
13783 index_type
= objfile_type (objfile
)->builtin_int
;
13784 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13785 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13787 return set_die_type (die
, type
, cu
);
13790 back_to
= make_cleanup (null_cleanup
, NULL
);
13791 child_die
= die
->child
;
13792 while (child_die
&& child_die
->tag
)
13794 if (child_die
->tag
== DW_TAG_subrange_type
)
13796 struct type
*child_type
= read_type_die (child_die
, cu
);
13798 if (child_type
!= NULL
)
13800 /* The range type was succesfully read. Save it for the
13801 array type creation. */
13802 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13804 range_types
= (struct type
**)
13805 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13806 * sizeof (struct type
*));
13808 make_cleanup (free_current_contents
, &range_types
);
13810 range_types
[ndim
++] = child_type
;
13813 child_die
= sibling_die (child_die
);
13816 /* Dwarf2 dimensions are output from left to right, create the
13817 necessary array types in backwards order. */
13819 type
= element_type
;
13821 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13826 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13832 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13836 /* Understand Dwarf2 support for vector types (like they occur on
13837 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13838 array type. This is not part of the Dwarf2/3 standard yet, but a
13839 custom vendor extension. The main difference between a regular
13840 array and the vector variant is that vectors are passed by value
13842 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13844 make_vector_type (type
);
13846 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13847 implementation may choose to implement triple vectors using this
13849 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13852 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13853 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13855 complaint (&symfile_complaints
,
13856 _("DW_AT_byte_size for array type smaller "
13857 "than the total size of elements"));
13860 name
= dwarf2_name (die
, cu
);
13862 TYPE_NAME (type
) = name
;
13864 /* Install the type in the die. */
13865 set_die_type (die
, type
, cu
);
13867 /* set_die_type should be already done. */
13868 set_descriptive_type (type
, die
, cu
);
13870 do_cleanups (back_to
);
13875 static enum dwarf_array_dim_ordering
13876 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13878 struct attribute
*attr
;
13880 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13883 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13885 /* GNU F77 is a special case, as at 08/2004 array type info is the
13886 opposite order to the dwarf2 specification, but data is still
13887 laid out as per normal fortran.
13889 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13890 version checking. */
13892 if (cu
->language
== language_fortran
13893 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13895 return DW_ORD_row_major
;
13898 switch (cu
->language_defn
->la_array_ordering
)
13900 case array_column_major
:
13901 return DW_ORD_col_major
;
13902 case array_row_major
:
13904 return DW_ORD_row_major
;
13908 /* Extract all information from a DW_TAG_set_type DIE and put it in
13909 the DIE's type field. */
13911 static struct type
*
13912 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13914 struct type
*domain_type
, *set_type
;
13915 struct attribute
*attr
;
13917 domain_type
= die_type (die
, cu
);
13919 /* The die_type call above may have already set the type for this DIE. */
13920 set_type
= get_die_type (die
, cu
);
13924 set_type
= create_set_type (NULL
, domain_type
);
13926 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13928 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13930 return set_die_type (die
, set_type
, cu
);
13933 /* A helper for read_common_block that creates a locexpr baton.
13934 SYM is the symbol which we are marking as computed.
13935 COMMON_DIE is the DIE for the common block.
13936 COMMON_LOC is the location expression attribute for the common
13938 MEMBER_LOC is the location expression attribute for the particular
13939 member of the common block that we are processing.
13940 CU is the CU from which the above come. */
13943 mark_common_block_symbol_computed (struct symbol
*sym
,
13944 struct die_info
*common_die
,
13945 struct attribute
*common_loc
,
13946 struct attribute
*member_loc
,
13947 struct dwarf2_cu
*cu
)
13949 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13950 struct dwarf2_locexpr_baton
*baton
;
13952 unsigned int cu_off
;
13953 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13954 LONGEST offset
= 0;
13956 gdb_assert (common_loc
&& member_loc
);
13957 gdb_assert (attr_form_is_block (common_loc
));
13958 gdb_assert (attr_form_is_block (member_loc
)
13959 || attr_form_is_constant (member_loc
));
13961 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13962 baton
->per_cu
= cu
->per_cu
;
13963 gdb_assert (baton
->per_cu
);
13965 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13967 if (attr_form_is_constant (member_loc
))
13969 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13970 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13973 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13975 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13978 *ptr
++ = DW_OP_call4
;
13979 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13980 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13983 if (attr_form_is_constant (member_loc
))
13985 *ptr
++ = DW_OP_addr
;
13986 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13987 ptr
+= cu
->header
.addr_size
;
13991 /* We have to copy the data here, because DW_OP_call4 will only
13992 use a DW_AT_location attribute. */
13993 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13994 ptr
+= DW_BLOCK (member_loc
)->size
;
13997 *ptr
++ = DW_OP_plus
;
13998 gdb_assert (ptr
- baton
->data
== baton
->size
);
14000 SYMBOL_LOCATION_BATON (sym
) = baton
;
14001 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
14004 /* Create appropriate locally-scoped variables for all the
14005 DW_TAG_common_block entries. Also create a struct common_block
14006 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
14007 is used to sepate the common blocks name namespace from regular
14011 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
14013 struct attribute
*attr
;
14015 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14018 /* Support the .debug_loc offsets. */
14019 if (attr_form_is_block (attr
))
14023 else if (attr_form_is_section_offset (attr
))
14025 dwarf2_complex_location_expr_complaint ();
14030 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14031 "common block member");
14036 if (die
->child
!= NULL
)
14038 struct objfile
*objfile
= cu
->objfile
;
14039 struct die_info
*child_die
;
14040 size_t n_entries
= 0, size
;
14041 struct common_block
*common_block
;
14042 struct symbol
*sym
;
14044 for (child_die
= die
->child
;
14045 child_die
&& child_die
->tag
;
14046 child_die
= sibling_die (child_die
))
14049 size
= (sizeof (struct common_block
)
14050 + (n_entries
- 1) * sizeof (struct symbol
*));
14052 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14054 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14055 common_block
->n_entries
= 0;
14057 for (child_die
= die
->child
;
14058 child_die
&& child_die
->tag
;
14059 child_die
= sibling_die (child_die
))
14061 /* Create the symbol in the DW_TAG_common_block block in the current
14063 sym
= new_symbol (child_die
, NULL
, cu
);
14066 struct attribute
*member_loc
;
14068 common_block
->contents
[common_block
->n_entries
++] = sym
;
14070 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14074 /* GDB has handled this for a long time, but it is
14075 not specified by DWARF. It seems to have been
14076 emitted by gfortran at least as recently as:
14077 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14078 complaint (&symfile_complaints
,
14079 _("Variable in common block has "
14080 "DW_AT_data_member_location "
14081 "- DIE at 0x%x [in module %s]"),
14082 child_die
->offset
.sect_off
,
14083 objfile_name (cu
->objfile
));
14085 if (attr_form_is_section_offset (member_loc
))
14086 dwarf2_complex_location_expr_complaint ();
14087 else if (attr_form_is_constant (member_loc
)
14088 || attr_form_is_block (member_loc
))
14091 mark_common_block_symbol_computed (sym
, die
, attr
,
14095 dwarf2_complex_location_expr_complaint ();
14100 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14101 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14105 /* Create a type for a C++ namespace. */
14107 static struct type
*
14108 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14110 struct objfile
*objfile
= cu
->objfile
;
14111 const char *previous_prefix
, *name
;
14115 /* For extensions, reuse the type of the original namespace. */
14116 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14118 struct die_info
*ext_die
;
14119 struct dwarf2_cu
*ext_cu
= cu
;
14121 ext_die
= dwarf2_extension (die
, &ext_cu
);
14122 type
= read_type_die (ext_die
, ext_cu
);
14124 /* EXT_CU may not be the same as CU.
14125 Ensure TYPE is recorded with CU in die_type_hash. */
14126 return set_die_type (die
, type
, cu
);
14129 name
= namespace_name (die
, &is_anonymous
, cu
);
14131 /* Now build the name of the current namespace. */
14133 previous_prefix
= determine_prefix (die
, cu
);
14134 if (previous_prefix
[0] != '\0')
14135 name
= typename_concat (&objfile
->objfile_obstack
,
14136 previous_prefix
, name
, 0, cu
);
14138 /* Create the type. */
14139 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14141 TYPE_NAME (type
) = name
;
14142 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14144 return set_die_type (die
, type
, cu
);
14147 /* Read a namespace scope. */
14150 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14152 struct objfile
*objfile
= cu
->objfile
;
14155 /* Add a symbol associated to this if we haven't seen the namespace
14156 before. Also, add a using directive if it's an anonymous
14159 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14163 type
= read_type_die (die
, cu
);
14164 new_symbol (die
, type
, cu
);
14166 namespace_name (die
, &is_anonymous
, cu
);
14169 const char *previous_prefix
= determine_prefix (die
, cu
);
14171 add_using_directive (using_directives (cu
->language
),
14172 previous_prefix
, TYPE_NAME (type
), NULL
,
14173 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14177 if (die
->child
!= NULL
)
14179 struct die_info
*child_die
= die
->child
;
14181 while (child_die
&& child_die
->tag
)
14183 process_die (child_die
, cu
);
14184 child_die
= sibling_die (child_die
);
14189 /* Read a Fortran module as type. This DIE can be only a declaration used for
14190 imported module. Still we need that type as local Fortran "use ... only"
14191 declaration imports depend on the created type in determine_prefix. */
14193 static struct type
*
14194 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14196 struct objfile
*objfile
= cu
->objfile
;
14197 const char *module_name
;
14200 module_name
= dwarf2_name (die
, cu
);
14202 complaint (&symfile_complaints
,
14203 _("DW_TAG_module has no name, offset 0x%x"),
14204 die
->offset
.sect_off
);
14205 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14207 /* determine_prefix uses TYPE_TAG_NAME. */
14208 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14210 return set_die_type (die
, type
, cu
);
14213 /* Read a Fortran module. */
14216 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14218 struct die_info
*child_die
= die
->child
;
14221 type
= read_type_die (die
, cu
);
14222 new_symbol (die
, type
, cu
);
14224 while (child_die
&& child_die
->tag
)
14226 process_die (child_die
, cu
);
14227 child_die
= sibling_die (child_die
);
14231 /* Return the name of the namespace represented by DIE. Set
14232 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14235 static const char *
14236 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14238 struct die_info
*current_die
;
14239 const char *name
= NULL
;
14241 /* Loop through the extensions until we find a name. */
14243 for (current_die
= die
;
14244 current_die
!= NULL
;
14245 current_die
= dwarf2_extension (die
, &cu
))
14247 /* We don't use dwarf2_name here so that we can detect the absence
14248 of a name -> anonymous namespace. */
14249 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14255 /* Is it an anonymous namespace? */
14257 *is_anonymous
= (name
== NULL
);
14259 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14264 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14265 the user defined type vector. */
14267 static struct type
*
14268 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14270 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14271 struct comp_unit_head
*cu_header
= &cu
->header
;
14273 struct attribute
*attr_byte_size
;
14274 struct attribute
*attr_address_class
;
14275 int byte_size
, addr_class
;
14276 struct type
*target_type
;
14278 target_type
= die_type (die
, cu
);
14280 /* The die_type call above may have already set the type for this DIE. */
14281 type
= get_die_type (die
, cu
);
14285 type
= lookup_pointer_type (target_type
);
14287 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14288 if (attr_byte_size
)
14289 byte_size
= DW_UNSND (attr_byte_size
);
14291 byte_size
= cu_header
->addr_size
;
14293 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14294 if (attr_address_class
)
14295 addr_class
= DW_UNSND (attr_address_class
);
14297 addr_class
= DW_ADDR_none
;
14299 /* If the pointer size or address class is different than the
14300 default, create a type variant marked as such and set the
14301 length accordingly. */
14302 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14304 if (gdbarch_address_class_type_flags_p (gdbarch
))
14308 type_flags
= gdbarch_address_class_type_flags
14309 (gdbarch
, byte_size
, addr_class
);
14310 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14312 type
= make_type_with_address_space (type
, type_flags
);
14314 else if (TYPE_LENGTH (type
) != byte_size
)
14316 complaint (&symfile_complaints
,
14317 _("invalid pointer size %d"), byte_size
);
14321 /* Should we also complain about unhandled address classes? */
14325 TYPE_LENGTH (type
) = byte_size
;
14326 return set_die_type (die
, type
, cu
);
14329 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14330 the user defined type vector. */
14332 static struct type
*
14333 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14336 struct type
*to_type
;
14337 struct type
*domain
;
14339 to_type
= die_type (die
, cu
);
14340 domain
= die_containing_type (die
, cu
);
14342 /* The calls above may have already set the type for this DIE. */
14343 type
= get_die_type (die
, cu
);
14347 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14348 type
= lookup_methodptr_type (to_type
);
14349 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14351 struct type
*new_type
= alloc_type (cu
->objfile
);
14353 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14354 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14355 TYPE_VARARGS (to_type
));
14356 type
= lookup_methodptr_type (new_type
);
14359 type
= lookup_memberptr_type (to_type
, domain
);
14361 return set_die_type (die
, type
, cu
);
14364 /* Extract all information from a DW_TAG_reference_type DIE and add to
14365 the user defined type vector. */
14367 static struct type
*
14368 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14370 struct comp_unit_head
*cu_header
= &cu
->header
;
14371 struct type
*type
, *target_type
;
14372 struct attribute
*attr
;
14374 target_type
= die_type (die
, cu
);
14376 /* The die_type call above may have already set the type for this DIE. */
14377 type
= get_die_type (die
, cu
);
14381 type
= lookup_reference_type (target_type
);
14382 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14385 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14389 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14391 return set_die_type (die
, type
, cu
);
14394 /* Add the given cv-qualifiers to the element type of the array. GCC
14395 outputs DWARF type qualifiers that apply to an array, not the
14396 element type. But GDB relies on the array element type to carry
14397 the cv-qualifiers. This mimics section 6.7.3 of the C99
14400 static struct type
*
14401 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14402 struct type
*base_type
, int cnst
, int voltl
)
14404 struct type
*el_type
, *inner_array
;
14406 base_type
= copy_type (base_type
);
14407 inner_array
= base_type
;
14409 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14411 TYPE_TARGET_TYPE (inner_array
) =
14412 copy_type (TYPE_TARGET_TYPE (inner_array
));
14413 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14416 el_type
= TYPE_TARGET_TYPE (inner_array
);
14417 cnst
|= TYPE_CONST (el_type
);
14418 voltl
|= TYPE_VOLATILE (el_type
);
14419 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14421 return set_die_type (die
, base_type
, cu
);
14424 static struct type
*
14425 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14427 struct type
*base_type
, *cv_type
;
14429 base_type
= die_type (die
, cu
);
14431 /* The die_type call above may have already set the type for this DIE. */
14432 cv_type
= get_die_type (die
, cu
);
14436 /* In case the const qualifier is applied to an array type, the element type
14437 is so qualified, not the array type (section 6.7.3 of C99). */
14438 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14439 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14441 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14442 return set_die_type (die
, cv_type
, cu
);
14445 static struct type
*
14446 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14448 struct type
*base_type
, *cv_type
;
14450 base_type
= die_type (die
, cu
);
14452 /* The die_type call above may have already set the type for this DIE. */
14453 cv_type
= get_die_type (die
, cu
);
14457 /* In case the volatile qualifier is applied to an array type, the
14458 element type is so qualified, not the array type (section 6.7.3
14460 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14461 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14463 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14464 return set_die_type (die
, cv_type
, cu
);
14467 /* Handle DW_TAG_restrict_type. */
14469 static struct type
*
14470 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14472 struct type
*base_type
, *cv_type
;
14474 base_type
= die_type (die
, cu
);
14476 /* The die_type call above may have already set the type for this DIE. */
14477 cv_type
= get_die_type (die
, cu
);
14481 cv_type
= make_restrict_type (base_type
);
14482 return set_die_type (die
, cv_type
, cu
);
14485 /* Handle DW_TAG_atomic_type. */
14487 static struct type
*
14488 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14490 struct type
*base_type
, *cv_type
;
14492 base_type
= die_type (die
, cu
);
14494 /* The die_type call above may have already set the type for this DIE. */
14495 cv_type
= get_die_type (die
, cu
);
14499 cv_type
= make_atomic_type (base_type
);
14500 return set_die_type (die
, cv_type
, cu
);
14503 /* Extract all information from a DW_TAG_string_type DIE and add to
14504 the user defined type vector. It isn't really a user defined type,
14505 but it behaves like one, with other DIE's using an AT_user_def_type
14506 attribute to reference it. */
14508 static struct type
*
14509 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14511 struct objfile
*objfile
= cu
->objfile
;
14512 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14513 struct type
*type
, *range_type
, *index_type
, *char_type
;
14514 struct attribute
*attr
;
14515 unsigned int length
;
14517 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14520 length
= DW_UNSND (attr
);
14524 /* Check for the DW_AT_byte_size attribute. */
14525 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14528 length
= DW_UNSND (attr
);
14536 index_type
= objfile_type (objfile
)->builtin_int
;
14537 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14538 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14539 type
= create_string_type (NULL
, char_type
, range_type
);
14541 return set_die_type (die
, type
, cu
);
14544 /* Assuming that DIE corresponds to a function, returns nonzero
14545 if the function is prototyped. */
14548 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14550 struct attribute
*attr
;
14552 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14553 if (attr
&& (DW_UNSND (attr
) != 0))
14556 /* The DWARF standard implies that the DW_AT_prototyped attribute
14557 is only meaninful for C, but the concept also extends to other
14558 languages that allow unprototyped functions (Eg: Objective C).
14559 For all other languages, assume that functions are always
14561 if (cu
->language
!= language_c
14562 && cu
->language
!= language_objc
14563 && cu
->language
!= language_opencl
)
14566 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14567 prototyped and unprototyped functions; default to prototyped,
14568 since that is more common in modern code (and RealView warns
14569 about unprototyped functions). */
14570 if (producer_is_realview (cu
->producer
))
14576 /* Handle DIES due to C code like:
14580 int (*funcp)(int a, long l);
14584 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14586 static struct type
*
14587 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14589 struct objfile
*objfile
= cu
->objfile
;
14590 struct type
*type
; /* Type that this function returns. */
14591 struct type
*ftype
; /* Function that returns above type. */
14592 struct attribute
*attr
;
14594 type
= die_type (die
, cu
);
14596 /* The die_type call above may have already set the type for this DIE. */
14597 ftype
= get_die_type (die
, cu
);
14601 ftype
= lookup_function_type (type
);
14603 if (prototyped_function_p (die
, cu
))
14604 TYPE_PROTOTYPED (ftype
) = 1;
14606 /* Store the calling convention in the type if it's available in
14607 the subroutine die. Otherwise set the calling convention to
14608 the default value DW_CC_normal. */
14609 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14611 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14612 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14613 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14615 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14617 /* Record whether the function returns normally to its caller or not
14618 if the DWARF producer set that information. */
14619 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14620 if (attr
&& (DW_UNSND (attr
) != 0))
14621 TYPE_NO_RETURN (ftype
) = 1;
14623 /* We need to add the subroutine type to the die immediately so
14624 we don't infinitely recurse when dealing with parameters
14625 declared as the same subroutine type. */
14626 set_die_type (die
, ftype
, cu
);
14628 if (die
->child
!= NULL
)
14630 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14631 struct die_info
*child_die
;
14632 int nparams
, iparams
;
14634 /* Count the number of parameters.
14635 FIXME: GDB currently ignores vararg functions, but knows about
14636 vararg member functions. */
14638 child_die
= die
->child
;
14639 while (child_die
&& child_die
->tag
)
14641 if (child_die
->tag
== DW_TAG_formal_parameter
)
14643 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14644 TYPE_VARARGS (ftype
) = 1;
14645 child_die
= sibling_die (child_die
);
14648 /* Allocate storage for parameters and fill them in. */
14649 TYPE_NFIELDS (ftype
) = nparams
;
14650 TYPE_FIELDS (ftype
) = (struct field
*)
14651 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14653 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14654 even if we error out during the parameters reading below. */
14655 for (iparams
= 0; iparams
< nparams
; iparams
++)
14656 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14659 child_die
= die
->child
;
14660 while (child_die
&& child_die
->tag
)
14662 if (child_die
->tag
== DW_TAG_formal_parameter
)
14664 struct type
*arg_type
;
14666 /* DWARF version 2 has no clean way to discern C++
14667 static and non-static member functions. G++ helps
14668 GDB by marking the first parameter for non-static
14669 member functions (which is the this pointer) as
14670 artificial. We pass this information to
14671 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14673 DWARF version 3 added DW_AT_object_pointer, which GCC
14674 4.5 does not yet generate. */
14675 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14677 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14680 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14682 /* GCC/43521: In java, the formal parameter
14683 "this" is sometimes not marked with DW_AT_artificial. */
14684 if (cu
->language
== language_java
)
14686 const char *name
= dwarf2_name (child_die
, cu
);
14688 if (name
&& !strcmp (name
, "this"))
14689 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14692 arg_type
= die_type (child_die
, cu
);
14694 /* RealView does not mark THIS as const, which the testsuite
14695 expects. GCC marks THIS as const in method definitions,
14696 but not in the class specifications (GCC PR 43053). */
14697 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14698 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14701 struct dwarf2_cu
*arg_cu
= cu
;
14702 const char *name
= dwarf2_name (child_die
, cu
);
14704 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14707 /* If the compiler emits this, use it. */
14708 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14711 else if (name
&& strcmp (name
, "this") == 0)
14712 /* Function definitions will have the argument names. */
14714 else if (name
== NULL
&& iparams
== 0)
14715 /* Declarations may not have the names, so like
14716 elsewhere in GDB, assume an artificial first
14717 argument is "this". */
14721 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14725 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14728 child_die
= sibling_die (child_die
);
14735 static struct type
*
14736 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14738 struct objfile
*objfile
= cu
->objfile
;
14739 const char *name
= NULL
;
14740 struct type
*this_type
, *target_type
;
14742 name
= dwarf2_full_name (NULL
, die
, cu
);
14743 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14744 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14745 TYPE_NAME (this_type
) = name
;
14746 set_die_type (die
, this_type
, cu
);
14747 target_type
= die_type (die
, cu
);
14748 if (target_type
!= this_type
)
14749 TYPE_TARGET_TYPE (this_type
) = target_type
;
14752 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14753 spec and cause infinite loops in GDB. */
14754 complaint (&symfile_complaints
,
14755 _("Self-referential DW_TAG_typedef "
14756 "- DIE at 0x%x [in module %s]"),
14757 die
->offset
.sect_off
, objfile_name (objfile
));
14758 TYPE_TARGET_TYPE (this_type
) = NULL
;
14763 /* Find a representation of a given base type and install
14764 it in the TYPE field of the die. */
14766 static struct type
*
14767 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14769 struct objfile
*objfile
= cu
->objfile
;
14771 struct attribute
*attr
;
14772 int encoding
= 0, size
= 0;
14774 enum type_code code
= TYPE_CODE_INT
;
14775 int type_flags
= 0;
14776 struct type
*target_type
= NULL
;
14778 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14781 encoding
= DW_UNSND (attr
);
14783 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14786 size
= DW_UNSND (attr
);
14788 name
= dwarf2_name (die
, cu
);
14791 complaint (&symfile_complaints
,
14792 _("DW_AT_name missing from DW_TAG_base_type"));
14797 case DW_ATE_address
:
14798 /* Turn DW_ATE_address into a void * pointer. */
14799 code
= TYPE_CODE_PTR
;
14800 type_flags
|= TYPE_FLAG_UNSIGNED
;
14801 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14803 case DW_ATE_boolean
:
14804 code
= TYPE_CODE_BOOL
;
14805 type_flags
|= TYPE_FLAG_UNSIGNED
;
14807 case DW_ATE_complex_float
:
14808 code
= TYPE_CODE_COMPLEX
;
14809 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14811 case DW_ATE_decimal_float
:
14812 code
= TYPE_CODE_DECFLOAT
;
14815 code
= TYPE_CODE_FLT
;
14817 case DW_ATE_signed
:
14819 case DW_ATE_unsigned
:
14820 type_flags
|= TYPE_FLAG_UNSIGNED
;
14821 if (cu
->language
== language_fortran
14823 && startswith (name
, "character("))
14824 code
= TYPE_CODE_CHAR
;
14826 case DW_ATE_signed_char
:
14827 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14828 || cu
->language
== language_pascal
14829 || cu
->language
== language_fortran
)
14830 code
= TYPE_CODE_CHAR
;
14832 case DW_ATE_unsigned_char
:
14833 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14834 || cu
->language
== language_pascal
14835 || cu
->language
== language_fortran
14836 || cu
->language
== language_rust
)
14837 code
= TYPE_CODE_CHAR
;
14838 type_flags
|= TYPE_FLAG_UNSIGNED
;
14841 /* We just treat this as an integer and then recognize the
14842 type by name elsewhere. */
14846 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14847 dwarf_type_encoding_name (encoding
));
14851 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14852 TYPE_NAME (type
) = name
;
14853 TYPE_TARGET_TYPE (type
) = target_type
;
14855 if (name
&& strcmp (name
, "char") == 0)
14856 TYPE_NOSIGN (type
) = 1;
14858 return set_die_type (die
, type
, cu
);
14861 /* Parse dwarf attribute if it's a block, reference or constant and put the
14862 resulting value of the attribute into struct bound_prop.
14863 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14866 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14867 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14869 struct dwarf2_property_baton
*baton
;
14870 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14872 if (attr
== NULL
|| prop
== NULL
)
14875 if (attr_form_is_block (attr
))
14877 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14878 baton
->referenced_type
= NULL
;
14879 baton
->locexpr
.per_cu
= cu
->per_cu
;
14880 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14881 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14882 prop
->data
.baton
= baton
;
14883 prop
->kind
= PROP_LOCEXPR
;
14884 gdb_assert (prop
->data
.baton
!= NULL
);
14886 else if (attr_form_is_ref (attr
))
14888 struct dwarf2_cu
*target_cu
= cu
;
14889 struct die_info
*target_die
;
14890 struct attribute
*target_attr
;
14892 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14893 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14894 if (target_attr
== NULL
)
14895 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14897 if (target_attr
== NULL
)
14900 switch (target_attr
->name
)
14902 case DW_AT_location
:
14903 if (attr_form_is_section_offset (target_attr
))
14905 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14906 baton
->referenced_type
= die_type (target_die
, target_cu
);
14907 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14908 prop
->data
.baton
= baton
;
14909 prop
->kind
= PROP_LOCLIST
;
14910 gdb_assert (prop
->data
.baton
!= NULL
);
14912 else if (attr_form_is_block (target_attr
))
14914 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14915 baton
->referenced_type
= die_type (target_die
, target_cu
);
14916 baton
->locexpr
.per_cu
= cu
->per_cu
;
14917 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14918 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14919 prop
->data
.baton
= baton
;
14920 prop
->kind
= PROP_LOCEXPR
;
14921 gdb_assert (prop
->data
.baton
!= NULL
);
14925 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14926 "dynamic property");
14930 case DW_AT_data_member_location
:
14934 if (!handle_data_member_location (target_die
, target_cu
,
14938 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14939 baton
->referenced_type
= read_type_die (target_die
->parent
,
14941 baton
->offset_info
.offset
= offset
;
14942 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14943 prop
->data
.baton
= baton
;
14944 prop
->kind
= PROP_ADDR_OFFSET
;
14949 else if (attr_form_is_constant (attr
))
14951 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14952 prop
->kind
= PROP_CONST
;
14956 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14957 dwarf2_name (die
, cu
));
14964 /* Read the given DW_AT_subrange DIE. */
14966 static struct type
*
14967 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14969 struct type
*base_type
, *orig_base_type
;
14970 struct type
*range_type
;
14971 struct attribute
*attr
;
14972 struct dynamic_prop low
, high
;
14973 int low_default_is_valid
;
14974 int high_bound_is_count
= 0;
14976 LONGEST negative_mask
;
14978 orig_base_type
= die_type (die
, cu
);
14979 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14980 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14981 creating the range type, but we use the result of check_typedef
14982 when examining properties of the type. */
14983 base_type
= check_typedef (orig_base_type
);
14985 /* The die_type call above may have already set the type for this DIE. */
14986 range_type
= get_die_type (die
, cu
);
14990 low
.kind
= PROP_CONST
;
14991 high
.kind
= PROP_CONST
;
14992 high
.data
.const_val
= 0;
14994 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14995 omitting DW_AT_lower_bound. */
14996 switch (cu
->language
)
14999 case language_cplus
:
15000 low
.data
.const_val
= 0;
15001 low_default_is_valid
= 1;
15003 case language_fortran
:
15004 low
.data
.const_val
= 1;
15005 low_default_is_valid
= 1;
15008 case language_java
:
15009 case language_objc
:
15010 case language_rust
:
15011 low
.data
.const_val
= 0;
15012 low_default_is_valid
= (cu
->header
.version
>= 4);
15016 case language_pascal
:
15017 low
.data
.const_val
= 1;
15018 low_default_is_valid
= (cu
->header
.version
>= 4);
15021 low
.data
.const_val
= 0;
15022 low_default_is_valid
= 0;
15026 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
15028 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
15029 else if (!low_default_is_valid
)
15030 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
15031 "- DIE at 0x%x [in module %s]"),
15032 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
15034 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
15035 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15037 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
15038 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15040 /* If bounds are constant do the final calculation here. */
15041 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
15042 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
15044 high_bound_is_count
= 1;
15048 /* Dwarf-2 specifications explicitly allows to create subrange types
15049 without specifying a base type.
15050 In that case, the base type must be set to the type of
15051 the lower bound, upper bound or count, in that order, if any of these
15052 three attributes references an object that has a type.
15053 If no base type is found, the Dwarf-2 specifications say that
15054 a signed integer type of size equal to the size of an address should
15056 For the following C code: `extern char gdb_int [];'
15057 GCC produces an empty range DIE.
15058 FIXME: muller/2010-05-28: Possible references to object for low bound,
15059 high bound or count are not yet handled by this code. */
15060 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15062 struct objfile
*objfile
= cu
->objfile
;
15063 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15064 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15065 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15067 /* Test "int", "long int", and "long long int" objfile types,
15068 and select the first one having a size above or equal to the
15069 architecture address size. */
15070 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15071 base_type
= int_type
;
15074 int_type
= objfile_type (objfile
)->builtin_long
;
15075 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15076 base_type
= int_type
;
15079 int_type
= objfile_type (objfile
)->builtin_long_long
;
15080 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15081 base_type
= int_type
;
15086 /* Normally, the DWARF producers are expected to use a signed
15087 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15088 But this is unfortunately not always the case, as witnessed
15089 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15090 is used instead. To work around that ambiguity, we treat
15091 the bounds as signed, and thus sign-extend their values, when
15092 the base type is signed. */
15094 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15095 if (low
.kind
== PROP_CONST
15096 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15097 low
.data
.const_val
|= negative_mask
;
15098 if (high
.kind
== PROP_CONST
15099 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15100 high
.data
.const_val
|= negative_mask
;
15102 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15104 if (high_bound_is_count
)
15105 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15107 /* Ada expects an empty array on no boundary attributes. */
15108 if (attr
== NULL
&& cu
->language
!= language_ada
)
15109 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15111 name
= dwarf2_name (die
, cu
);
15113 TYPE_NAME (range_type
) = name
;
15115 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15117 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15119 set_die_type (die
, range_type
, cu
);
15121 /* set_die_type should be already done. */
15122 set_descriptive_type (range_type
, die
, cu
);
15127 static struct type
*
15128 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15132 /* For now, we only support the C meaning of an unspecified type: void. */
15134 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15135 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15137 return set_die_type (die
, type
, cu
);
15140 /* Read a single die and all its descendents. Set the die's sibling
15141 field to NULL; set other fields in the die correctly, and set all
15142 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15143 location of the info_ptr after reading all of those dies. PARENT
15144 is the parent of the die in question. */
15146 static struct die_info
*
15147 read_die_and_children (const struct die_reader_specs
*reader
,
15148 const gdb_byte
*info_ptr
,
15149 const gdb_byte
**new_info_ptr
,
15150 struct die_info
*parent
)
15152 struct die_info
*die
;
15153 const gdb_byte
*cur_ptr
;
15156 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15159 *new_info_ptr
= cur_ptr
;
15162 store_in_ref_table (die
, reader
->cu
);
15165 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15169 *new_info_ptr
= cur_ptr
;
15172 die
->sibling
= NULL
;
15173 die
->parent
= parent
;
15177 /* Read a die, all of its descendents, and all of its siblings; set
15178 all of the fields of all of the dies correctly. Arguments are as
15179 in read_die_and_children. */
15181 static struct die_info
*
15182 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15183 const gdb_byte
*info_ptr
,
15184 const gdb_byte
**new_info_ptr
,
15185 struct die_info
*parent
)
15187 struct die_info
*first_die
, *last_sibling
;
15188 const gdb_byte
*cur_ptr
;
15190 cur_ptr
= info_ptr
;
15191 first_die
= last_sibling
= NULL
;
15195 struct die_info
*die
15196 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15200 *new_info_ptr
= cur_ptr
;
15207 last_sibling
->sibling
= die
;
15209 last_sibling
= die
;
15213 /* Read a die, all of its descendents, and all of its siblings; set
15214 all of the fields of all of the dies correctly. Arguments are as
15215 in read_die_and_children.
15216 This the main entry point for reading a DIE and all its children. */
15218 static struct die_info
*
15219 read_die_and_siblings (const struct die_reader_specs
*reader
,
15220 const gdb_byte
*info_ptr
,
15221 const gdb_byte
**new_info_ptr
,
15222 struct die_info
*parent
)
15224 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15225 new_info_ptr
, parent
);
15227 if (dwarf_die_debug
)
15229 fprintf_unfiltered (gdb_stdlog
,
15230 "Read die from %s@0x%x of %s:\n",
15231 get_section_name (reader
->die_section
),
15232 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15233 bfd_get_filename (reader
->abfd
));
15234 dump_die (die
, dwarf_die_debug
);
15240 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15242 The caller is responsible for filling in the extra attributes
15243 and updating (*DIEP)->num_attrs.
15244 Set DIEP to point to a newly allocated die with its information,
15245 except for its child, sibling, and parent fields.
15246 Set HAS_CHILDREN to tell whether the die has children or not. */
15248 static const gdb_byte
*
15249 read_full_die_1 (const struct die_reader_specs
*reader
,
15250 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15251 int *has_children
, int num_extra_attrs
)
15253 unsigned int abbrev_number
, bytes_read
, i
;
15254 sect_offset offset
;
15255 struct abbrev_info
*abbrev
;
15256 struct die_info
*die
;
15257 struct dwarf2_cu
*cu
= reader
->cu
;
15258 bfd
*abfd
= reader
->abfd
;
15260 offset
.sect_off
= info_ptr
- reader
->buffer
;
15261 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15262 info_ptr
+= bytes_read
;
15263 if (!abbrev_number
)
15270 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15272 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15274 bfd_get_filename (abfd
));
15276 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15277 die
->offset
= offset
;
15278 die
->tag
= abbrev
->tag
;
15279 die
->abbrev
= abbrev_number
;
15281 /* Make the result usable.
15282 The caller needs to update num_attrs after adding the extra
15284 die
->num_attrs
= abbrev
->num_attrs
;
15286 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15287 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15291 *has_children
= abbrev
->has_children
;
15295 /* Read a die and all its attributes.
15296 Set DIEP to point to a newly allocated die with its information,
15297 except for its child, sibling, and parent fields.
15298 Set HAS_CHILDREN to tell whether the die has children or not. */
15300 static const gdb_byte
*
15301 read_full_die (const struct die_reader_specs
*reader
,
15302 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15305 const gdb_byte
*result
;
15307 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15309 if (dwarf_die_debug
)
15311 fprintf_unfiltered (gdb_stdlog
,
15312 "Read die from %s@0x%x of %s:\n",
15313 get_section_name (reader
->die_section
),
15314 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15315 bfd_get_filename (reader
->abfd
));
15316 dump_die (*diep
, dwarf_die_debug
);
15322 /* Abbreviation tables.
15324 In DWARF version 2, the description of the debugging information is
15325 stored in a separate .debug_abbrev section. Before we read any
15326 dies from a section we read in all abbreviations and install them
15327 in a hash table. */
15329 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15331 static struct abbrev_info
*
15332 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15334 struct abbrev_info
*abbrev
;
15336 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15337 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15342 /* Add an abbreviation to the table. */
15345 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15346 unsigned int abbrev_number
,
15347 struct abbrev_info
*abbrev
)
15349 unsigned int hash_number
;
15351 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15352 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15353 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15356 /* Look up an abbrev in the table.
15357 Returns NULL if the abbrev is not found. */
15359 static struct abbrev_info
*
15360 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15361 unsigned int abbrev_number
)
15363 unsigned int hash_number
;
15364 struct abbrev_info
*abbrev
;
15366 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15367 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15371 if (abbrev
->number
== abbrev_number
)
15373 abbrev
= abbrev
->next
;
15378 /* Read in an abbrev table. */
15380 static struct abbrev_table
*
15381 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15382 sect_offset offset
)
15384 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15385 bfd
*abfd
= get_section_bfd_owner (section
);
15386 struct abbrev_table
*abbrev_table
;
15387 const gdb_byte
*abbrev_ptr
;
15388 struct abbrev_info
*cur_abbrev
;
15389 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15390 unsigned int abbrev_form
;
15391 struct attr_abbrev
*cur_attrs
;
15392 unsigned int allocated_attrs
;
15394 abbrev_table
= XNEW (struct abbrev_table
);
15395 abbrev_table
->offset
= offset
;
15396 obstack_init (&abbrev_table
->abbrev_obstack
);
15397 abbrev_table
->abbrevs
=
15398 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15400 memset (abbrev_table
->abbrevs
, 0,
15401 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15403 dwarf2_read_section (objfile
, section
);
15404 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15405 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15406 abbrev_ptr
+= bytes_read
;
15408 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15409 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15411 /* Loop until we reach an abbrev number of 0. */
15412 while (abbrev_number
)
15414 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15416 /* read in abbrev header */
15417 cur_abbrev
->number
= abbrev_number
;
15419 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15420 abbrev_ptr
+= bytes_read
;
15421 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15424 /* now read in declarations */
15425 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15426 abbrev_ptr
+= bytes_read
;
15427 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15428 abbrev_ptr
+= bytes_read
;
15429 while (abbrev_name
)
15431 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15433 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15435 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15438 cur_attrs
[cur_abbrev
->num_attrs
].name
15439 = (enum dwarf_attribute
) abbrev_name
;
15440 cur_attrs
[cur_abbrev
->num_attrs
++].form
15441 = (enum dwarf_form
) abbrev_form
;
15442 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15443 abbrev_ptr
+= bytes_read
;
15444 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15445 abbrev_ptr
+= bytes_read
;
15448 cur_abbrev
->attrs
=
15449 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15450 cur_abbrev
->num_attrs
);
15451 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15452 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15454 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15456 /* Get next abbreviation.
15457 Under Irix6 the abbreviations for a compilation unit are not
15458 always properly terminated with an abbrev number of 0.
15459 Exit loop if we encounter an abbreviation which we have
15460 already read (which means we are about to read the abbreviations
15461 for the next compile unit) or if the end of the abbreviation
15462 table is reached. */
15463 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15465 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15466 abbrev_ptr
+= bytes_read
;
15467 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15472 return abbrev_table
;
15475 /* Free the resources held by ABBREV_TABLE. */
15478 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15480 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15481 xfree (abbrev_table
);
15484 /* Same as abbrev_table_free but as a cleanup.
15485 We pass in a pointer to the pointer to the table so that we can
15486 set the pointer to NULL when we're done. It also simplifies
15487 build_type_psymtabs_1. */
15490 abbrev_table_free_cleanup (void *table_ptr
)
15492 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15494 if (*abbrev_table_ptr
!= NULL
)
15495 abbrev_table_free (*abbrev_table_ptr
);
15496 *abbrev_table_ptr
= NULL
;
15499 /* Read the abbrev table for CU from ABBREV_SECTION. */
15502 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15503 struct dwarf2_section_info
*abbrev_section
)
15506 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15509 /* Release the memory used by the abbrev table for a compilation unit. */
15512 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15514 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
15516 if (cu
->abbrev_table
!= NULL
)
15517 abbrev_table_free (cu
->abbrev_table
);
15518 /* Set this to NULL so that we SEGV if we try to read it later,
15519 and also because free_comp_unit verifies this is NULL. */
15520 cu
->abbrev_table
= NULL
;
15523 /* Returns nonzero if TAG represents a type that we might generate a partial
15527 is_type_tag_for_partial (int tag
)
15532 /* Some types that would be reasonable to generate partial symbols for,
15533 that we don't at present. */
15534 case DW_TAG_array_type
:
15535 case DW_TAG_file_type
:
15536 case DW_TAG_ptr_to_member_type
:
15537 case DW_TAG_set_type
:
15538 case DW_TAG_string_type
:
15539 case DW_TAG_subroutine_type
:
15541 case DW_TAG_base_type
:
15542 case DW_TAG_class_type
:
15543 case DW_TAG_interface_type
:
15544 case DW_TAG_enumeration_type
:
15545 case DW_TAG_structure_type
:
15546 case DW_TAG_subrange_type
:
15547 case DW_TAG_typedef
:
15548 case DW_TAG_union_type
:
15555 /* Load all DIEs that are interesting for partial symbols into memory. */
15557 static struct partial_die_info
*
15558 load_partial_dies (const struct die_reader_specs
*reader
,
15559 const gdb_byte
*info_ptr
, int building_psymtab
)
15561 struct dwarf2_cu
*cu
= reader
->cu
;
15562 struct objfile
*objfile
= cu
->objfile
;
15563 struct partial_die_info
*part_die
;
15564 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15565 struct abbrev_info
*abbrev
;
15566 unsigned int bytes_read
;
15567 unsigned int load_all
= 0;
15568 int nesting_level
= 1;
15573 gdb_assert (cu
->per_cu
!= NULL
);
15574 if (cu
->per_cu
->load_all_dies
)
15578 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15582 &cu
->comp_unit_obstack
,
15583 hashtab_obstack_allocate
,
15584 dummy_obstack_deallocate
);
15586 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15590 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15592 /* A NULL abbrev means the end of a series of children. */
15593 if (abbrev
== NULL
)
15595 if (--nesting_level
== 0)
15597 /* PART_DIE was probably the last thing allocated on the
15598 comp_unit_obstack, so we could call obstack_free
15599 here. We don't do that because the waste is small,
15600 and will be cleaned up when we're done with this
15601 compilation unit. This way, we're also more robust
15602 against other users of the comp_unit_obstack. */
15605 info_ptr
+= bytes_read
;
15606 last_die
= parent_die
;
15607 parent_die
= parent_die
->die_parent
;
15611 /* Check for template arguments. We never save these; if
15612 they're seen, we just mark the parent, and go on our way. */
15613 if (parent_die
!= NULL
15614 && cu
->language
== language_cplus
15615 && (abbrev
->tag
== DW_TAG_template_type_param
15616 || abbrev
->tag
== DW_TAG_template_value_param
))
15618 parent_die
->has_template_arguments
= 1;
15622 /* We don't need a partial DIE for the template argument. */
15623 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15628 /* We only recurse into c++ subprograms looking for template arguments.
15629 Skip their other children. */
15631 && cu
->language
== language_cplus
15632 && parent_die
!= NULL
15633 && parent_die
->tag
== DW_TAG_subprogram
)
15635 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15639 /* Check whether this DIE is interesting enough to save. Normally
15640 we would not be interested in members here, but there may be
15641 later variables referencing them via DW_AT_specification (for
15642 static members). */
15644 && !is_type_tag_for_partial (abbrev
->tag
)
15645 && abbrev
->tag
!= DW_TAG_constant
15646 && abbrev
->tag
!= DW_TAG_enumerator
15647 && abbrev
->tag
!= DW_TAG_subprogram
15648 && abbrev
->tag
!= DW_TAG_lexical_block
15649 && abbrev
->tag
!= DW_TAG_variable
15650 && abbrev
->tag
!= DW_TAG_namespace
15651 && abbrev
->tag
!= DW_TAG_module
15652 && abbrev
->tag
!= DW_TAG_member
15653 && abbrev
->tag
!= DW_TAG_imported_unit
15654 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15656 /* Otherwise we skip to the next sibling, if any. */
15657 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15661 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15664 /* This two-pass algorithm for processing partial symbols has a
15665 high cost in cache pressure. Thus, handle some simple cases
15666 here which cover the majority of C partial symbols. DIEs
15667 which neither have specification tags in them, nor could have
15668 specification tags elsewhere pointing at them, can simply be
15669 processed and discarded.
15671 This segment is also optional; scan_partial_symbols and
15672 add_partial_symbol will handle these DIEs if we chain
15673 them in normally. When compilers which do not emit large
15674 quantities of duplicate debug information are more common,
15675 this code can probably be removed. */
15677 /* Any complete simple types at the top level (pretty much all
15678 of them, for a language without namespaces), can be processed
15680 if (parent_die
== NULL
15681 && part_die
->has_specification
== 0
15682 && part_die
->is_declaration
== 0
15683 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15684 || part_die
->tag
== DW_TAG_base_type
15685 || part_die
->tag
== DW_TAG_subrange_type
))
15687 if (building_psymtab
&& part_die
->name
!= NULL
)
15688 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15689 VAR_DOMAIN
, LOC_TYPEDEF
,
15690 &objfile
->static_psymbols
,
15691 0, cu
->language
, objfile
);
15692 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15696 /* The exception for DW_TAG_typedef with has_children above is
15697 a workaround of GCC PR debug/47510. In the case of this complaint
15698 type_name_no_tag_or_error will error on such types later.
15700 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15701 it could not find the child DIEs referenced later, this is checked
15702 above. In correct DWARF DW_TAG_typedef should have no children. */
15704 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15705 complaint (&symfile_complaints
,
15706 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15707 "- DIE at 0x%x [in module %s]"),
15708 part_die
->offset
.sect_off
, objfile_name (objfile
));
15710 /* If we're at the second level, and we're an enumerator, and
15711 our parent has no specification (meaning possibly lives in a
15712 namespace elsewhere), then we can add the partial symbol now
15713 instead of queueing it. */
15714 if (part_die
->tag
== DW_TAG_enumerator
15715 && parent_die
!= NULL
15716 && parent_die
->die_parent
== NULL
15717 && parent_die
->tag
== DW_TAG_enumeration_type
15718 && parent_die
->has_specification
== 0)
15720 if (part_die
->name
== NULL
)
15721 complaint (&symfile_complaints
,
15722 _("malformed enumerator DIE ignored"));
15723 else if (building_psymtab
)
15724 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15725 VAR_DOMAIN
, LOC_CONST
,
15726 (cu
->language
== language_cplus
15727 || cu
->language
== language_java
)
15728 ? &objfile
->global_psymbols
15729 : &objfile
->static_psymbols
,
15730 0, cu
->language
, objfile
);
15732 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15736 /* We'll save this DIE so link it in. */
15737 part_die
->die_parent
= parent_die
;
15738 part_die
->die_sibling
= NULL
;
15739 part_die
->die_child
= NULL
;
15741 if (last_die
&& last_die
== parent_die
)
15742 last_die
->die_child
= part_die
;
15744 last_die
->die_sibling
= part_die
;
15746 last_die
= part_die
;
15748 if (first_die
== NULL
)
15749 first_die
= part_die
;
15751 /* Maybe add the DIE to the hash table. Not all DIEs that we
15752 find interesting need to be in the hash table, because we
15753 also have the parent/sibling/child chains; only those that we
15754 might refer to by offset later during partial symbol reading.
15756 For now this means things that might have be the target of a
15757 DW_AT_specification, DW_AT_abstract_origin, or
15758 DW_AT_extension. DW_AT_extension will refer only to
15759 namespaces; DW_AT_abstract_origin refers to functions (and
15760 many things under the function DIE, but we do not recurse
15761 into function DIEs during partial symbol reading) and
15762 possibly variables as well; DW_AT_specification refers to
15763 declarations. Declarations ought to have the DW_AT_declaration
15764 flag. It happens that GCC forgets to put it in sometimes, but
15765 only for functions, not for types.
15767 Adding more things than necessary to the hash table is harmless
15768 except for the performance cost. Adding too few will result in
15769 wasted time in find_partial_die, when we reread the compilation
15770 unit with load_all_dies set. */
15773 || abbrev
->tag
== DW_TAG_constant
15774 || abbrev
->tag
== DW_TAG_subprogram
15775 || abbrev
->tag
== DW_TAG_variable
15776 || abbrev
->tag
== DW_TAG_namespace
15777 || part_die
->is_declaration
)
15781 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15782 part_die
->offset
.sect_off
, INSERT
);
15786 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15788 /* For some DIEs we want to follow their children (if any). For C
15789 we have no reason to follow the children of structures; for other
15790 languages we have to, so that we can get at method physnames
15791 to infer fully qualified class names, for DW_AT_specification,
15792 and for C++ template arguments. For C++, we also look one level
15793 inside functions to find template arguments (if the name of the
15794 function does not already contain the template arguments).
15796 For Ada, we need to scan the children of subprograms and lexical
15797 blocks as well because Ada allows the definition of nested
15798 entities that could be interesting for the debugger, such as
15799 nested subprograms for instance. */
15800 if (last_die
->has_children
15802 || last_die
->tag
== DW_TAG_namespace
15803 || last_die
->tag
== DW_TAG_module
15804 || last_die
->tag
== DW_TAG_enumeration_type
15805 || (cu
->language
== language_cplus
15806 && last_die
->tag
== DW_TAG_subprogram
15807 && (last_die
->name
== NULL
15808 || strchr (last_die
->name
, '<') == NULL
))
15809 || (cu
->language
!= language_c
15810 && (last_die
->tag
== DW_TAG_class_type
15811 || last_die
->tag
== DW_TAG_interface_type
15812 || last_die
->tag
== DW_TAG_structure_type
15813 || last_die
->tag
== DW_TAG_union_type
))
15814 || (cu
->language
== language_ada
15815 && (last_die
->tag
== DW_TAG_subprogram
15816 || last_die
->tag
== DW_TAG_lexical_block
))))
15819 parent_die
= last_die
;
15823 /* Otherwise we skip to the next sibling, if any. */
15824 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15826 /* Back to the top, do it again. */
15830 /* Read a minimal amount of information into the minimal die structure. */
15832 static const gdb_byte
*
15833 read_partial_die (const struct die_reader_specs
*reader
,
15834 struct partial_die_info
*part_die
,
15835 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15836 const gdb_byte
*info_ptr
)
15838 struct dwarf2_cu
*cu
= reader
->cu
;
15839 struct objfile
*objfile
= cu
->objfile
;
15840 const gdb_byte
*buffer
= reader
->buffer
;
15842 struct attribute attr
;
15843 int has_low_pc_attr
= 0;
15844 int has_high_pc_attr
= 0;
15845 int high_pc_relative
= 0;
15847 memset (part_die
, 0, sizeof (struct partial_die_info
));
15849 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15851 info_ptr
+= abbrev_len
;
15853 if (abbrev
== NULL
)
15856 part_die
->tag
= abbrev
->tag
;
15857 part_die
->has_children
= abbrev
->has_children
;
15859 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15861 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15863 /* Store the data if it is of an attribute we want to keep in a
15864 partial symbol table. */
15868 switch (part_die
->tag
)
15870 case DW_TAG_compile_unit
:
15871 case DW_TAG_partial_unit
:
15872 case DW_TAG_type_unit
:
15873 /* Compilation units have a DW_AT_name that is a filename, not
15874 a source language identifier. */
15875 case DW_TAG_enumeration_type
:
15876 case DW_TAG_enumerator
:
15877 /* These tags always have simple identifiers already; no need
15878 to canonicalize them. */
15879 part_die
->name
= DW_STRING (&attr
);
15883 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15884 &objfile
->per_bfd
->storage_obstack
);
15888 case DW_AT_linkage_name
:
15889 case DW_AT_MIPS_linkage_name
:
15890 /* Note that both forms of linkage name might appear. We
15891 assume they will be the same, and we only store the last
15893 if (cu
->language
== language_ada
)
15894 part_die
->name
= DW_STRING (&attr
);
15895 part_die
->linkage_name
= DW_STRING (&attr
);
15898 has_low_pc_attr
= 1;
15899 part_die
->lowpc
= attr_value_as_address (&attr
);
15901 case DW_AT_high_pc
:
15902 has_high_pc_attr
= 1;
15903 part_die
->highpc
= attr_value_as_address (&attr
);
15904 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15905 high_pc_relative
= 1;
15907 case DW_AT_location
:
15908 /* Support the .debug_loc offsets. */
15909 if (attr_form_is_block (&attr
))
15911 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15913 else if (attr_form_is_section_offset (&attr
))
15915 dwarf2_complex_location_expr_complaint ();
15919 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15920 "partial symbol information");
15923 case DW_AT_external
:
15924 part_die
->is_external
= DW_UNSND (&attr
);
15926 case DW_AT_declaration
:
15927 part_die
->is_declaration
= DW_UNSND (&attr
);
15930 part_die
->has_type
= 1;
15932 case DW_AT_abstract_origin
:
15933 case DW_AT_specification
:
15934 case DW_AT_extension
:
15935 part_die
->has_specification
= 1;
15936 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15937 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15938 || cu
->per_cu
->is_dwz
);
15940 case DW_AT_sibling
:
15941 /* Ignore absolute siblings, they might point outside of
15942 the current compile unit. */
15943 if (attr
.form
== DW_FORM_ref_addr
)
15944 complaint (&symfile_complaints
,
15945 _("ignoring absolute DW_AT_sibling"));
15948 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15949 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15951 if (sibling_ptr
< info_ptr
)
15952 complaint (&symfile_complaints
,
15953 _("DW_AT_sibling points backwards"));
15954 else if (sibling_ptr
> reader
->buffer_end
)
15955 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15957 part_die
->sibling
= sibling_ptr
;
15960 case DW_AT_byte_size
:
15961 part_die
->has_byte_size
= 1;
15963 case DW_AT_const_value
:
15964 part_die
->has_const_value
= 1;
15966 case DW_AT_calling_convention
:
15967 /* DWARF doesn't provide a way to identify a program's source-level
15968 entry point. DW_AT_calling_convention attributes are only meant
15969 to describe functions' calling conventions.
15971 However, because it's a necessary piece of information in
15972 Fortran, and because DW_CC_program is the only piece of debugging
15973 information whose definition refers to a 'main program' at all,
15974 several compilers have begun marking Fortran main programs with
15975 DW_CC_program --- even when those functions use the standard
15976 calling conventions.
15978 So until DWARF specifies a way to provide this information and
15979 compilers pick up the new representation, we'll support this
15981 if (DW_UNSND (&attr
) == DW_CC_program
15982 && cu
->language
== language_fortran
15983 && part_die
->name
!= NULL
)
15984 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15987 if (DW_UNSND (&attr
) == DW_INL_inlined
15988 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15989 part_die
->may_be_inlined
= 1;
15993 if (part_die
->tag
== DW_TAG_imported_unit
)
15995 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15996 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15997 || cu
->per_cu
->is_dwz
);
16006 if (high_pc_relative
)
16007 part_die
->highpc
+= part_die
->lowpc
;
16009 if (has_low_pc_attr
&& has_high_pc_attr
)
16011 /* When using the GNU linker, .gnu.linkonce. sections are used to
16012 eliminate duplicate copies of functions and vtables and such.
16013 The linker will arbitrarily choose one and discard the others.
16014 The AT_*_pc values for such functions refer to local labels in
16015 these sections. If the section from that file was discarded, the
16016 labels are not in the output, so the relocs get a value of 0.
16017 If this is a discarded function, mark the pc bounds as invalid,
16018 so that GDB will ignore it. */
16019 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
16021 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16023 complaint (&symfile_complaints
,
16024 _("DW_AT_low_pc %s is zero "
16025 "for DIE at 0x%x [in module %s]"),
16026 paddress (gdbarch
, part_die
->lowpc
),
16027 part_die
->offset
.sect_off
, objfile_name (objfile
));
16029 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
16030 else if (part_die
->lowpc
>= part_die
->highpc
)
16032 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16034 complaint (&symfile_complaints
,
16035 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
16036 "for DIE at 0x%x [in module %s]"),
16037 paddress (gdbarch
, part_die
->lowpc
),
16038 paddress (gdbarch
, part_die
->highpc
),
16039 part_die
->offset
.sect_off
, objfile_name (objfile
));
16042 part_die
->has_pc_info
= 1;
16048 /* Find a cached partial DIE at OFFSET in CU. */
16050 static struct partial_die_info
*
16051 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
16053 struct partial_die_info
*lookup_die
= NULL
;
16054 struct partial_die_info part_die
;
16056 part_die
.offset
= offset
;
16057 lookup_die
= ((struct partial_die_info
*)
16058 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16064 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16065 except in the case of .debug_types DIEs which do not reference
16066 outside their CU (they do however referencing other types via
16067 DW_FORM_ref_sig8). */
16069 static struct partial_die_info
*
16070 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16072 struct objfile
*objfile
= cu
->objfile
;
16073 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16074 struct partial_die_info
*pd
= NULL
;
16076 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16077 && offset_in_cu_p (&cu
->header
, offset
))
16079 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16082 /* We missed recording what we needed.
16083 Load all dies and try again. */
16084 per_cu
= cu
->per_cu
;
16088 /* TUs don't reference other CUs/TUs (except via type signatures). */
16089 if (cu
->per_cu
->is_debug_types
)
16091 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16092 " external reference to offset 0x%lx [in module %s].\n"),
16093 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16094 bfd_get_filename (objfile
->obfd
));
16096 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16099 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16100 load_partial_comp_unit (per_cu
);
16102 per_cu
->cu
->last_used
= 0;
16103 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16106 /* If we didn't find it, and not all dies have been loaded,
16107 load them all and try again. */
16109 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16111 per_cu
->load_all_dies
= 1;
16113 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16114 THIS_CU->cu may already be in use. So we can't just free it and
16115 replace its DIEs with the ones we read in. Instead, we leave those
16116 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16117 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16119 load_partial_comp_unit (per_cu
);
16121 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16125 internal_error (__FILE__
, __LINE__
,
16126 _("could not find partial DIE 0x%x "
16127 "in cache [from module %s]\n"),
16128 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16132 /* See if we can figure out if the class lives in a namespace. We do
16133 this by looking for a member function; its demangled name will
16134 contain namespace info, if there is any. */
16137 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16138 struct dwarf2_cu
*cu
)
16140 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16141 what template types look like, because the demangler
16142 frequently doesn't give the same name as the debug info. We
16143 could fix this by only using the demangled name to get the
16144 prefix (but see comment in read_structure_type). */
16146 struct partial_die_info
*real_pdi
;
16147 struct partial_die_info
*child_pdi
;
16149 /* If this DIE (this DIE's specification, if any) has a parent, then
16150 we should not do this. We'll prepend the parent's fully qualified
16151 name when we create the partial symbol. */
16153 real_pdi
= struct_pdi
;
16154 while (real_pdi
->has_specification
)
16155 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16156 real_pdi
->spec_is_dwz
, cu
);
16158 if (real_pdi
->die_parent
!= NULL
)
16161 for (child_pdi
= struct_pdi
->die_child
;
16163 child_pdi
= child_pdi
->die_sibling
)
16165 if (child_pdi
->tag
== DW_TAG_subprogram
16166 && child_pdi
->linkage_name
!= NULL
)
16168 char *actual_class_name
16169 = language_class_name_from_physname (cu
->language_defn
,
16170 child_pdi
->linkage_name
);
16171 if (actual_class_name
!= NULL
)
16175 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16177 strlen (actual_class_name
)));
16178 xfree (actual_class_name
);
16185 /* Adjust PART_DIE before generating a symbol for it. This function
16186 may set the is_external flag or change the DIE's name. */
16189 fixup_partial_die (struct partial_die_info
*part_die
,
16190 struct dwarf2_cu
*cu
)
16192 /* Once we've fixed up a die, there's no point in doing so again.
16193 This also avoids a memory leak if we were to call
16194 guess_partial_die_structure_name multiple times. */
16195 if (part_die
->fixup_called
)
16198 /* If we found a reference attribute and the DIE has no name, try
16199 to find a name in the referred to DIE. */
16201 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16203 struct partial_die_info
*spec_die
;
16205 spec_die
= find_partial_die (part_die
->spec_offset
,
16206 part_die
->spec_is_dwz
, cu
);
16208 fixup_partial_die (spec_die
, cu
);
16210 if (spec_die
->name
)
16212 part_die
->name
= spec_die
->name
;
16214 /* Copy DW_AT_external attribute if it is set. */
16215 if (spec_die
->is_external
)
16216 part_die
->is_external
= spec_die
->is_external
;
16220 /* Set default names for some unnamed DIEs. */
16222 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16223 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16225 /* If there is no parent die to provide a namespace, and there are
16226 children, see if we can determine the namespace from their linkage
16228 if (cu
->language
== language_cplus
16229 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16230 && part_die
->die_parent
== NULL
16231 && part_die
->has_children
16232 && (part_die
->tag
== DW_TAG_class_type
16233 || part_die
->tag
== DW_TAG_structure_type
16234 || part_die
->tag
== DW_TAG_union_type
))
16235 guess_partial_die_structure_name (part_die
, cu
);
16237 /* GCC might emit a nameless struct or union that has a linkage
16238 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16239 if (part_die
->name
== NULL
16240 && (part_die
->tag
== DW_TAG_class_type
16241 || part_die
->tag
== DW_TAG_interface_type
16242 || part_die
->tag
== DW_TAG_structure_type
16243 || part_die
->tag
== DW_TAG_union_type
)
16244 && part_die
->linkage_name
!= NULL
)
16248 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16253 /* Strip any leading namespaces/classes, keep only the base name.
16254 DW_AT_name for named DIEs does not contain the prefixes. */
16255 base
= strrchr (demangled
, ':');
16256 if (base
&& base
> demangled
&& base
[-1] == ':')
16263 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16264 base
, strlen (base
)));
16269 part_die
->fixup_called
= 1;
16272 /* Read an attribute value described by an attribute form. */
16274 static const gdb_byte
*
16275 read_attribute_value (const struct die_reader_specs
*reader
,
16276 struct attribute
*attr
, unsigned form
,
16277 const gdb_byte
*info_ptr
)
16279 struct dwarf2_cu
*cu
= reader
->cu
;
16280 struct objfile
*objfile
= cu
->objfile
;
16281 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16282 bfd
*abfd
= reader
->abfd
;
16283 struct comp_unit_head
*cu_header
= &cu
->header
;
16284 unsigned int bytes_read
;
16285 struct dwarf_block
*blk
;
16287 attr
->form
= (enum dwarf_form
) form
;
16290 case DW_FORM_ref_addr
:
16291 if (cu
->header
.version
== 2)
16292 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16294 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16295 &cu
->header
, &bytes_read
);
16296 info_ptr
+= bytes_read
;
16298 case DW_FORM_GNU_ref_alt
:
16299 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16300 info_ptr
+= bytes_read
;
16303 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16304 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16305 info_ptr
+= bytes_read
;
16307 case DW_FORM_block2
:
16308 blk
= dwarf_alloc_block (cu
);
16309 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16311 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16312 info_ptr
+= blk
->size
;
16313 DW_BLOCK (attr
) = blk
;
16315 case DW_FORM_block4
:
16316 blk
= dwarf_alloc_block (cu
);
16317 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16319 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16320 info_ptr
+= blk
->size
;
16321 DW_BLOCK (attr
) = blk
;
16323 case DW_FORM_data2
:
16324 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16327 case DW_FORM_data4
:
16328 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16331 case DW_FORM_data8
:
16332 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16335 case DW_FORM_sec_offset
:
16336 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16337 info_ptr
+= bytes_read
;
16339 case DW_FORM_string
:
16340 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16341 DW_STRING_IS_CANONICAL (attr
) = 0;
16342 info_ptr
+= bytes_read
;
16345 if (!cu
->per_cu
->is_dwz
)
16347 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16349 DW_STRING_IS_CANONICAL (attr
) = 0;
16350 info_ptr
+= bytes_read
;
16354 case DW_FORM_GNU_strp_alt
:
16356 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16357 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16360 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16361 DW_STRING_IS_CANONICAL (attr
) = 0;
16362 info_ptr
+= bytes_read
;
16365 case DW_FORM_exprloc
:
16366 case DW_FORM_block
:
16367 blk
= dwarf_alloc_block (cu
);
16368 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16369 info_ptr
+= bytes_read
;
16370 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16371 info_ptr
+= blk
->size
;
16372 DW_BLOCK (attr
) = blk
;
16374 case DW_FORM_block1
:
16375 blk
= dwarf_alloc_block (cu
);
16376 blk
->size
= read_1_byte (abfd
, info_ptr
);
16378 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16379 info_ptr
+= blk
->size
;
16380 DW_BLOCK (attr
) = blk
;
16382 case DW_FORM_data1
:
16383 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16387 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16390 case DW_FORM_flag_present
:
16391 DW_UNSND (attr
) = 1;
16393 case DW_FORM_sdata
:
16394 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16395 info_ptr
+= bytes_read
;
16397 case DW_FORM_udata
:
16398 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16399 info_ptr
+= bytes_read
;
16402 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16403 + read_1_byte (abfd
, info_ptr
));
16407 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16408 + read_2_bytes (abfd
, info_ptr
));
16412 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16413 + read_4_bytes (abfd
, info_ptr
));
16417 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16418 + read_8_bytes (abfd
, info_ptr
));
16421 case DW_FORM_ref_sig8
:
16422 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16425 case DW_FORM_ref_udata
:
16426 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16427 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16428 info_ptr
+= bytes_read
;
16430 case DW_FORM_indirect
:
16431 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16432 info_ptr
+= bytes_read
;
16433 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16435 case DW_FORM_GNU_addr_index
:
16436 if (reader
->dwo_file
== NULL
)
16438 /* For now flag a hard error.
16439 Later we can turn this into a complaint. */
16440 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16441 dwarf_form_name (form
),
16442 bfd_get_filename (abfd
));
16444 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16445 info_ptr
+= bytes_read
;
16447 case DW_FORM_GNU_str_index
:
16448 if (reader
->dwo_file
== NULL
)
16450 /* For now flag a hard error.
16451 Later we can turn this into a complaint if warranted. */
16452 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16453 dwarf_form_name (form
),
16454 bfd_get_filename (abfd
));
16457 ULONGEST str_index
=
16458 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16460 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16461 DW_STRING_IS_CANONICAL (attr
) = 0;
16462 info_ptr
+= bytes_read
;
16466 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16467 dwarf_form_name (form
),
16468 bfd_get_filename (abfd
));
16472 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16473 attr
->form
= DW_FORM_GNU_ref_alt
;
16475 /* We have seen instances where the compiler tried to emit a byte
16476 size attribute of -1 which ended up being encoded as an unsigned
16477 0xffffffff. Although 0xffffffff is technically a valid size value,
16478 an object of this size seems pretty unlikely so we can relatively
16479 safely treat these cases as if the size attribute was invalid and
16480 treat them as zero by default. */
16481 if (attr
->name
== DW_AT_byte_size
16482 && form
== DW_FORM_data4
16483 && DW_UNSND (attr
) >= 0xffffffff)
16486 (&symfile_complaints
,
16487 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16488 hex_string (DW_UNSND (attr
)));
16489 DW_UNSND (attr
) = 0;
16495 /* Read an attribute described by an abbreviated attribute. */
16497 static const gdb_byte
*
16498 read_attribute (const struct die_reader_specs
*reader
,
16499 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16500 const gdb_byte
*info_ptr
)
16502 attr
->name
= abbrev
->name
;
16503 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16506 /* Read dwarf information from a buffer. */
16508 static unsigned int
16509 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16511 return bfd_get_8 (abfd
, buf
);
16515 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16517 return bfd_get_signed_8 (abfd
, buf
);
16520 static unsigned int
16521 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16523 return bfd_get_16 (abfd
, buf
);
16527 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16529 return bfd_get_signed_16 (abfd
, buf
);
16532 static unsigned int
16533 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16535 return bfd_get_32 (abfd
, buf
);
16539 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16541 return bfd_get_signed_32 (abfd
, buf
);
16545 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16547 return bfd_get_64 (abfd
, buf
);
16551 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16552 unsigned int *bytes_read
)
16554 struct comp_unit_head
*cu_header
= &cu
->header
;
16555 CORE_ADDR retval
= 0;
16557 if (cu_header
->signed_addr_p
)
16559 switch (cu_header
->addr_size
)
16562 retval
= bfd_get_signed_16 (abfd
, buf
);
16565 retval
= bfd_get_signed_32 (abfd
, buf
);
16568 retval
= bfd_get_signed_64 (abfd
, buf
);
16571 internal_error (__FILE__
, __LINE__
,
16572 _("read_address: bad switch, signed [in module %s]"),
16573 bfd_get_filename (abfd
));
16578 switch (cu_header
->addr_size
)
16581 retval
= bfd_get_16 (abfd
, buf
);
16584 retval
= bfd_get_32 (abfd
, buf
);
16587 retval
= bfd_get_64 (abfd
, buf
);
16590 internal_error (__FILE__
, __LINE__
,
16591 _("read_address: bad switch, "
16592 "unsigned [in module %s]"),
16593 bfd_get_filename (abfd
));
16597 *bytes_read
= cu_header
->addr_size
;
16601 /* Read the initial length from a section. The (draft) DWARF 3
16602 specification allows the initial length to take up either 4 bytes
16603 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16604 bytes describe the length and all offsets will be 8 bytes in length
16607 An older, non-standard 64-bit format is also handled by this
16608 function. The older format in question stores the initial length
16609 as an 8-byte quantity without an escape value. Lengths greater
16610 than 2^32 aren't very common which means that the initial 4 bytes
16611 is almost always zero. Since a length value of zero doesn't make
16612 sense for the 32-bit format, this initial zero can be considered to
16613 be an escape value which indicates the presence of the older 64-bit
16614 format. As written, the code can't detect (old format) lengths
16615 greater than 4GB. If it becomes necessary to handle lengths
16616 somewhat larger than 4GB, we could allow other small values (such
16617 as the non-sensical values of 1, 2, and 3) to also be used as
16618 escape values indicating the presence of the old format.
16620 The value returned via bytes_read should be used to increment the
16621 relevant pointer after calling read_initial_length().
16623 [ Note: read_initial_length() and read_offset() are based on the
16624 document entitled "DWARF Debugging Information Format", revision
16625 3, draft 8, dated November 19, 2001. This document was obtained
16628 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16630 This document is only a draft and is subject to change. (So beware.)
16632 Details regarding the older, non-standard 64-bit format were
16633 determined empirically by examining 64-bit ELF files produced by
16634 the SGI toolchain on an IRIX 6.5 machine.
16636 - Kevin, July 16, 2002
16640 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16642 LONGEST length
= bfd_get_32 (abfd
, buf
);
16644 if (length
== 0xffffffff)
16646 length
= bfd_get_64 (abfd
, buf
+ 4);
16649 else if (length
== 0)
16651 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16652 length
= bfd_get_64 (abfd
, buf
);
16663 /* Cover function for read_initial_length.
16664 Returns the length of the object at BUF, and stores the size of the
16665 initial length in *BYTES_READ and stores the size that offsets will be in
16667 If the initial length size is not equivalent to that specified in
16668 CU_HEADER then issue a complaint.
16669 This is useful when reading non-comp-unit headers. */
16672 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16673 const struct comp_unit_head
*cu_header
,
16674 unsigned int *bytes_read
,
16675 unsigned int *offset_size
)
16677 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16679 gdb_assert (cu_header
->initial_length_size
== 4
16680 || cu_header
->initial_length_size
== 8
16681 || cu_header
->initial_length_size
== 12);
16683 if (cu_header
->initial_length_size
!= *bytes_read
)
16684 complaint (&symfile_complaints
,
16685 _("intermixed 32-bit and 64-bit DWARF sections"));
16687 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16691 /* Read an offset from the data stream. The size of the offset is
16692 given by cu_header->offset_size. */
16695 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16696 const struct comp_unit_head
*cu_header
,
16697 unsigned int *bytes_read
)
16699 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16701 *bytes_read
= cu_header
->offset_size
;
16705 /* Read an offset from the data stream. */
16708 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16710 LONGEST retval
= 0;
16712 switch (offset_size
)
16715 retval
= bfd_get_32 (abfd
, buf
);
16718 retval
= bfd_get_64 (abfd
, buf
);
16721 internal_error (__FILE__
, __LINE__
,
16722 _("read_offset_1: bad switch [in module %s]"),
16723 bfd_get_filename (abfd
));
16729 static const gdb_byte
*
16730 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16732 /* If the size of a host char is 8 bits, we can return a pointer
16733 to the buffer, otherwise we have to copy the data to a buffer
16734 allocated on the temporary obstack. */
16735 gdb_assert (HOST_CHAR_BIT
== 8);
16739 static const char *
16740 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16741 unsigned int *bytes_read_ptr
)
16743 /* If the size of a host char is 8 bits, we can return a pointer
16744 to the string, otherwise we have to copy the string to a buffer
16745 allocated on the temporary obstack. */
16746 gdb_assert (HOST_CHAR_BIT
== 8);
16749 *bytes_read_ptr
= 1;
16752 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16753 return (const char *) buf
;
16756 static const char *
16757 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16759 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16760 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16761 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16762 bfd_get_filename (abfd
));
16763 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16764 error (_("DW_FORM_strp pointing outside of "
16765 ".debug_str section [in module %s]"),
16766 bfd_get_filename (abfd
));
16767 gdb_assert (HOST_CHAR_BIT
== 8);
16768 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16770 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16773 /* Read a string at offset STR_OFFSET in the .debug_str section from
16774 the .dwz file DWZ. Throw an error if the offset is too large. If
16775 the string consists of a single NUL byte, return NULL; otherwise
16776 return a pointer to the string. */
16778 static const char *
16779 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16781 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16783 if (dwz
->str
.buffer
== NULL
)
16784 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16785 "section [in module %s]"),
16786 bfd_get_filename (dwz
->dwz_bfd
));
16787 if (str_offset
>= dwz
->str
.size
)
16788 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16789 ".debug_str section [in module %s]"),
16790 bfd_get_filename (dwz
->dwz_bfd
));
16791 gdb_assert (HOST_CHAR_BIT
== 8);
16792 if (dwz
->str
.buffer
[str_offset
] == '\0')
16794 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16797 static const char *
16798 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16799 const struct comp_unit_head
*cu_header
,
16800 unsigned int *bytes_read_ptr
)
16802 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16804 return read_indirect_string_at_offset (abfd
, str_offset
);
16808 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16809 unsigned int *bytes_read_ptr
)
16812 unsigned int num_read
;
16814 unsigned char byte
;
16821 byte
= bfd_get_8 (abfd
, buf
);
16824 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16825 if ((byte
& 128) == 0)
16831 *bytes_read_ptr
= num_read
;
16836 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16837 unsigned int *bytes_read_ptr
)
16840 int shift
, num_read
;
16841 unsigned char byte
;
16848 byte
= bfd_get_8 (abfd
, buf
);
16851 result
|= ((LONGEST
) (byte
& 127) << shift
);
16853 if ((byte
& 128) == 0)
16858 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16859 result
|= -(((LONGEST
) 1) << shift
);
16860 *bytes_read_ptr
= num_read
;
16864 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16865 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16866 ADDR_SIZE is the size of addresses from the CU header. */
16869 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16871 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16872 bfd
*abfd
= objfile
->obfd
;
16873 const gdb_byte
*info_ptr
;
16875 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16876 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16877 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16878 objfile_name (objfile
));
16879 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16880 error (_("DW_FORM_addr_index pointing outside of "
16881 ".debug_addr section [in module %s]"),
16882 objfile_name (objfile
));
16883 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16884 + addr_base
+ addr_index
* addr_size
);
16885 if (addr_size
== 4)
16886 return bfd_get_32 (abfd
, info_ptr
);
16888 return bfd_get_64 (abfd
, info_ptr
);
16891 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16894 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16896 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16899 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16902 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16903 unsigned int *bytes_read
)
16905 bfd
*abfd
= cu
->objfile
->obfd
;
16906 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16908 return read_addr_index (cu
, addr_index
);
16911 /* Data structure to pass results from dwarf2_read_addr_index_reader
16912 back to dwarf2_read_addr_index. */
16914 struct dwarf2_read_addr_index_data
16916 ULONGEST addr_base
;
16920 /* die_reader_func for dwarf2_read_addr_index. */
16923 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16924 const gdb_byte
*info_ptr
,
16925 struct die_info
*comp_unit_die
,
16929 struct dwarf2_cu
*cu
= reader
->cu
;
16930 struct dwarf2_read_addr_index_data
*aidata
=
16931 (struct dwarf2_read_addr_index_data
*) data
;
16933 aidata
->addr_base
= cu
->addr_base
;
16934 aidata
->addr_size
= cu
->header
.addr_size
;
16937 /* Given an index in .debug_addr, fetch the value.
16938 NOTE: This can be called during dwarf expression evaluation,
16939 long after the debug information has been read, and thus per_cu->cu
16940 may no longer exist. */
16943 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16944 unsigned int addr_index
)
16946 struct objfile
*objfile
= per_cu
->objfile
;
16947 struct dwarf2_cu
*cu
= per_cu
->cu
;
16948 ULONGEST addr_base
;
16951 /* This is intended to be called from outside this file. */
16952 dw2_setup (objfile
);
16954 /* We need addr_base and addr_size.
16955 If we don't have PER_CU->cu, we have to get it.
16956 Nasty, but the alternative is storing the needed info in PER_CU,
16957 which at this point doesn't seem justified: it's not clear how frequently
16958 it would get used and it would increase the size of every PER_CU.
16959 Entry points like dwarf2_per_cu_addr_size do a similar thing
16960 so we're not in uncharted territory here.
16961 Alas we need to be a bit more complicated as addr_base is contained
16964 We don't need to read the entire CU(/TU).
16965 We just need the header and top level die.
16967 IWBN to use the aging mechanism to let us lazily later discard the CU.
16968 For now we skip this optimization. */
16972 addr_base
= cu
->addr_base
;
16973 addr_size
= cu
->header
.addr_size
;
16977 struct dwarf2_read_addr_index_data aidata
;
16979 /* Note: We can't use init_cutu_and_read_dies_simple here,
16980 we need addr_base. */
16981 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16982 dwarf2_read_addr_index_reader
, &aidata
);
16983 addr_base
= aidata
.addr_base
;
16984 addr_size
= aidata
.addr_size
;
16987 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16990 /* Given a DW_FORM_GNU_str_index, fetch the string.
16991 This is only used by the Fission support. */
16993 static const char *
16994 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16996 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16997 const char *objf_name
= objfile_name (objfile
);
16998 bfd
*abfd
= objfile
->obfd
;
16999 struct dwarf2_cu
*cu
= reader
->cu
;
17000 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
17001 struct dwarf2_section_info
*str_offsets_section
=
17002 &reader
->dwo_file
->sections
.str_offsets
;
17003 const gdb_byte
*info_ptr
;
17004 ULONGEST str_offset
;
17005 static const char form_name
[] = "DW_FORM_GNU_str_index";
17007 dwarf2_read_section (objfile
, str_section
);
17008 dwarf2_read_section (objfile
, str_offsets_section
);
17009 if (str_section
->buffer
== NULL
)
17010 error (_("%s used without .debug_str.dwo section"
17011 " in CU at offset 0x%lx [in module %s]"),
17012 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17013 if (str_offsets_section
->buffer
== NULL
)
17014 error (_("%s used without .debug_str_offsets.dwo section"
17015 " in CU at offset 0x%lx [in module %s]"),
17016 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17017 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
17018 error (_("%s pointing outside of .debug_str_offsets.dwo"
17019 " section in CU at offset 0x%lx [in module %s]"),
17020 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17021 info_ptr
= (str_offsets_section
->buffer
17022 + str_index
* cu
->header
.offset_size
);
17023 if (cu
->header
.offset_size
== 4)
17024 str_offset
= bfd_get_32 (abfd
, info_ptr
);
17026 str_offset
= bfd_get_64 (abfd
, info_ptr
);
17027 if (str_offset
>= str_section
->size
)
17028 error (_("Offset from %s pointing outside of"
17029 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
17030 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
17031 return (const char *) (str_section
->buffer
+ str_offset
);
17034 /* Return the length of an LEB128 number in BUF. */
17037 leb128_size (const gdb_byte
*buf
)
17039 const gdb_byte
*begin
= buf
;
17045 if ((byte
& 128) == 0)
17046 return buf
- begin
;
17051 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17060 cu
->language
= language_c
;
17062 case DW_LANG_C_plus_plus
:
17063 case DW_LANG_C_plus_plus_11
:
17064 case DW_LANG_C_plus_plus_14
:
17065 cu
->language
= language_cplus
;
17068 cu
->language
= language_d
;
17070 case DW_LANG_Fortran77
:
17071 case DW_LANG_Fortran90
:
17072 case DW_LANG_Fortran95
:
17073 case DW_LANG_Fortran03
:
17074 case DW_LANG_Fortran08
:
17075 cu
->language
= language_fortran
;
17078 cu
->language
= language_go
;
17080 case DW_LANG_Mips_Assembler
:
17081 cu
->language
= language_asm
;
17084 cu
->language
= language_java
;
17086 case DW_LANG_Ada83
:
17087 case DW_LANG_Ada95
:
17088 cu
->language
= language_ada
;
17090 case DW_LANG_Modula2
:
17091 cu
->language
= language_m2
;
17093 case DW_LANG_Pascal83
:
17094 cu
->language
= language_pascal
;
17097 cu
->language
= language_objc
;
17100 case DW_LANG_Rust_old
:
17101 cu
->language
= language_rust
;
17103 case DW_LANG_Cobol74
:
17104 case DW_LANG_Cobol85
:
17106 cu
->language
= language_minimal
;
17109 cu
->language_defn
= language_def (cu
->language
);
17112 /* Return the named attribute or NULL if not there. */
17114 static struct attribute
*
17115 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17120 struct attribute
*spec
= NULL
;
17122 for (i
= 0; i
< die
->num_attrs
; ++i
)
17124 if (die
->attrs
[i
].name
== name
)
17125 return &die
->attrs
[i
];
17126 if (die
->attrs
[i
].name
== DW_AT_specification
17127 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17128 spec
= &die
->attrs
[i
];
17134 die
= follow_die_ref (die
, spec
, &cu
);
17140 /* Return the named attribute or NULL if not there,
17141 but do not follow DW_AT_specification, etc.
17142 This is for use in contexts where we're reading .debug_types dies.
17143 Following DW_AT_specification, DW_AT_abstract_origin will take us
17144 back up the chain, and we want to go down. */
17146 static struct attribute
*
17147 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17151 for (i
= 0; i
< die
->num_attrs
; ++i
)
17152 if (die
->attrs
[i
].name
== name
)
17153 return &die
->attrs
[i
];
17158 /* Return the string associated with a string-typed attribute, or NULL if it
17159 is either not found or is of an incorrect type. */
17161 static const char *
17162 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17164 struct attribute
*attr
;
17165 const char *str
= NULL
;
17167 attr
= dwarf2_attr (die
, name
, cu
);
17171 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_string
17172 || attr
->form
== DW_FORM_GNU_strp_alt
)
17173 str
= DW_STRING (attr
);
17175 complaint (&symfile_complaints
,
17176 _("string type expected for attribute %s for "
17177 "DIE at 0x%x in module %s"),
17178 dwarf_attr_name (name
), die
->offset
.sect_off
,
17179 objfile_name (cu
->objfile
));
17185 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17186 and holds a non-zero value. This function should only be used for
17187 DW_FORM_flag or DW_FORM_flag_present attributes. */
17190 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17192 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17194 return (attr
&& DW_UNSND (attr
));
17198 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17200 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17201 which value is non-zero. However, we have to be careful with
17202 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17203 (via dwarf2_flag_true_p) follows this attribute. So we may
17204 end up accidently finding a declaration attribute that belongs
17205 to a different DIE referenced by the specification attribute,
17206 even though the given DIE does not have a declaration attribute. */
17207 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17208 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17211 /* Return the die giving the specification for DIE, if there is
17212 one. *SPEC_CU is the CU containing DIE on input, and the CU
17213 containing the return value on output. If there is no
17214 specification, but there is an abstract origin, that is
17217 static struct die_info
*
17218 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17220 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17223 if (spec_attr
== NULL
)
17224 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17226 if (spec_attr
== NULL
)
17229 return follow_die_ref (die
, spec_attr
, spec_cu
);
17232 /* Free the line_header structure *LH, and any arrays and strings it
17234 NOTE: This is also used as a "cleanup" function. */
17237 free_line_header (struct line_header
*lh
)
17239 if (lh
->standard_opcode_lengths
)
17240 xfree (lh
->standard_opcode_lengths
);
17242 /* Remember that all the lh->file_names[i].name pointers are
17243 pointers into debug_line_buffer, and don't need to be freed. */
17244 if (lh
->file_names
)
17245 xfree (lh
->file_names
);
17247 /* Similarly for the include directory names. */
17248 if (lh
->include_dirs
)
17249 xfree (lh
->include_dirs
);
17254 /* Stub for free_line_header to match void * callback types. */
17257 free_line_header_voidp (void *arg
)
17259 struct line_header
*lh
= (struct line_header
*) arg
;
17261 free_line_header (lh
);
17264 /* Add an entry to LH's include directory table. */
17267 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17269 if (dwarf_line_debug
>= 2)
17270 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17271 lh
->num_include_dirs
+ 1, include_dir
);
17273 /* Grow the array if necessary. */
17274 if (lh
->include_dirs_size
== 0)
17276 lh
->include_dirs_size
= 1; /* for testing */
17277 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17279 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17281 lh
->include_dirs_size
*= 2;
17282 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17283 lh
->include_dirs_size
);
17286 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17289 /* Add an entry to LH's file name table. */
17292 add_file_name (struct line_header
*lh
,
17294 unsigned int dir_index
,
17295 unsigned int mod_time
,
17296 unsigned int length
)
17298 struct file_entry
*fe
;
17300 if (dwarf_line_debug
>= 2)
17301 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17302 lh
->num_file_names
+ 1, name
);
17304 /* Grow the array if necessary. */
17305 if (lh
->file_names_size
== 0)
17307 lh
->file_names_size
= 1; /* for testing */
17308 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17310 else if (lh
->num_file_names
>= lh
->file_names_size
)
17312 lh
->file_names_size
*= 2;
17314 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17317 fe
= &lh
->file_names
[lh
->num_file_names
++];
17319 fe
->dir_index
= dir_index
;
17320 fe
->mod_time
= mod_time
;
17321 fe
->length
= length
;
17322 fe
->included_p
= 0;
17326 /* A convenience function to find the proper .debug_line section for a CU. */
17328 static struct dwarf2_section_info
*
17329 get_debug_line_section (struct dwarf2_cu
*cu
)
17331 struct dwarf2_section_info
*section
;
17333 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17335 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17336 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17337 else if (cu
->per_cu
->is_dwz
)
17339 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17341 section
= &dwz
->line
;
17344 section
= &dwarf2_per_objfile
->line
;
17349 /* Read the statement program header starting at OFFSET in
17350 .debug_line, or .debug_line.dwo. Return a pointer
17351 to a struct line_header, allocated using xmalloc.
17352 Returns NULL if there is a problem reading the header, e.g., if it
17353 has a version we don't understand.
17355 NOTE: the strings in the include directory and file name tables of
17356 the returned object point into the dwarf line section buffer,
17357 and must not be freed. */
17359 static struct line_header
*
17360 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17362 struct cleanup
*back_to
;
17363 struct line_header
*lh
;
17364 const gdb_byte
*line_ptr
;
17365 unsigned int bytes_read
, offset_size
;
17367 const char *cur_dir
, *cur_file
;
17368 struct dwarf2_section_info
*section
;
17371 section
= get_debug_line_section (cu
);
17372 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17373 if (section
->buffer
== NULL
)
17375 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17376 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17378 complaint (&symfile_complaints
, _("missing .debug_line section"));
17382 /* We can't do this until we know the section is non-empty.
17383 Only then do we know we have such a section. */
17384 abfd
= get_section_bfd_owner (section
);
17386 /* Make sure that at least there's room for the total_length field.
17387 That could be 12 bytes long, but we're just going to fudge that. */
17388 if (offset
+ 4 >= section
->size
)
17390 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17394 lh
= XNEW (struct line_header
);
17395 memset (lh
, 0, sizeof (*lh
));
17396 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17399 lh
->offset
.sect_off
= offset
;
17400 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17402 line_ptr
= section
->buffer
+ offset
;
17404 /* Read in the header. */
17406 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17407 &bytes_read
, &offset_size
);
17408 line_ptr
+= bytes_read
;
17409 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17411 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17412 do_cleanups (back_to
);
17415 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17416 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17418 if (lh
->version
> 4)
17420 /* This is a version we don't understand. The format could have
17421 changed in ways we don't handle properly so just punt. */
17422 complaint (&symfile_complaints
,
17423 _("unsupported version in .debug_line section"));
17426 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17427 line_ptr
+= offset_size
;
17428 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17430 if (lh
->version
>= 4)
17432 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17436 lh
->maximum_ops_per_instruction
= 1;
17438 if (lh
->maximum_ops_per_instruction
== 0)
17440 lh
->maximum_ops_per_instruction
= 1;
17441 complaint (&symfile_complaints
,
17442 _("invalid maximum_ops_per_instruction "
17443 "in `.debug_line' section"));
17446 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17448 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17450 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17452 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17454 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17456 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17457 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17459 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17463 /* Read directory table. */
17464 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17466 line_ptr
+= bytes_read
;
17467 add_include_dir (lh
, cur_dir
);
17469 line_ptr
+= bytes_read
;
17471 /* Read file name table. */
17472 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17474 unsigned int dir_index
, mod_time
, length
;
17476 line_ptr
+= bytes_read
;
17477 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17478 line_ptr
+= bytes_read
;
17479 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17480 line_ptr
+= bytes_read
;
17481 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17482 line_ptr
+= bytes_read
;
17484 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17486 line_ptr
+= bytes_read
;
17487 lh
->statement_program_start
= line_ptr
;
17489 if (line_ptr
> (section
->buffer
+ section
->size
))
17490 complaint (&symfile_complaints
,
17491 _("line number info header doesn't "
17492 "fit in `.debug_line' section"));
17494 discard_cleanups (back_to
);
17498 /* Subroutine of dwarf_decode_lines to simplify it.
17499 Return the file name of the psymtab for included file FILE_INDEX
17500 in line header LH of PST.
17501 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17502 If space for the result is malloc'd, it will be freed by a cleanup.
17503 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17505 The function creates dangling cleanup registration. */
17507 static const char *
17508 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17509 const struct partial_symtab
*pst
,
17510 const char *comp_dir
)
17512 const struct file_entry fe
= lh
->file_names
[file_index
];
17513 const char *include_name
= fe
.name
;
17514 const char *include_name_to_compare
= include_name
;
17515 const char *dir_name
= NULL
;
17516 const char *pst_filename
;
17517 char *copied_name
= NULL
;
17520 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17521 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17523 if (!IS_ABSOLUTE_PATH (include_name
)
17524 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17526 /* Avoid creating a duplicate psymtab for PST.
17527 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17528 Before we do the comparison, however, we need to account
17529 for DIR_NAME and COMP_DIR.
17530 First prepend dir_name (if non-NULL). If we still don't
17531 have an absolute path prepend comp_dir (if non-NULL).
17532 However, the directory we record in the include-file's
17533 psymtab does not contain COMP_DIR (to match the
17534 corresponding symtab(s)).
17539 bash$ gcc -g ./hello.c
17540 include_name = "hello.c"
17542 DW_AT_comp_dir = comp_dir = "/tmp"
17543 DW_AT_name = "./hello.c"
17547 if (dir_name
!= NULL
)
17549 char *tem
= concat (dir_name
, SLASH_STRING
,
17550 include_name
, (char *)NULL
);
17552 make_cleanup (xfree
, tem
);
17553 include_name
= tem
;
17554 include_name_to_compare
= include_name
;
17556 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17558 char *tem
= concat (comp_dir
, SLASH_STRING
,
17559 include_name
, (char *)NULL
);
17561 make_cleanup (xfree
, tem
);
17562 include_name_to_compare
= tem
;
17566 pst_filename
= pst
->filename
;
17567 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17569 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17570 pst_filename
, (char *)NULL
);
17571 pst_filename
= copied_name
;
17574 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17576 if (copied_name
!= NULL
)
17577 xfree (copied_name
);
17581 return include_name
;
17584 /* State machine to track the state of the line number program. */
17588 /* These are part of the standard DWARF line number state machine. */
17590 unsigned char op_index
;
17595 unsigned int discriminator
;
17597 /* Additional bits of state we need to track. */
17599 /* The last file that we called dwarf2_start_subfile for.
17600 This is only used for TLLs. */
17601 unsigned int last_file
;
17602 /* The last file a line number was recorded for. */
17603 struct subfile
*last_subfile
;
17605 /* The function to call to record a line. */
17606 record_line_ftype
*record_line
;
17608 /* The last line number that was recorded, used to coalesce
17609 consecutive entries for the same line. This can happen, for
17610 example, when discriminators are present. PR 17276. */
17611 unsigned int last_line
;
17612 int line_has_non_zero_discriminator
;
17613 } lnp_state_machine
;
17615 /* There's a lot of static state to pass to dwarf_record_line.
17616 This keeps it all together. */
17621 struct gdbarch
*gdbarch
;
17623 /* The line number header. */
17624 struct line_header
*line_header
;
17626 /* Non-zero if we're recording lines.
17627 Otherwise we're building partial symtabs and are just interested in
17628 finding include files mentioned by the line number program. */
17629 int record_lines_p
;
17630 } lnp_reader_state
;
17632 /* Ignore this record_line request. */
17635 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17640 /* Return non-zero if we should add LINE to the line number table.
17641 LINE is the line to add, LAST_LINE is the last line that was added,
17642 LAST_SUBFILE is the subfile for LAST_LINE.
17643 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17644 had a non-zero discriminator.
17646 We have to be careful in the presence of discriminators.
17647 E.g., for this line:
17649 for (i = 0; i < 100000; i++);
17651 clang can emit four line number entries for that one line,
17652 each with a different discriminator.
17653 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17655 However, we want gdb to coalesce all four entries into one.
17656 Otherwise the user could stepi into the middle of the line and
17657 gdb would get confused about whether the pc really was in the
17658 middle of the line.
17660 Things are further complicated by the fact that two consecutive
17661 line number entries for the same line is a heuristic used by gcc
17662 to denote the end of the prologue. So we can't just discard duplicate
17663 entries, we have to be selective about it. The heuristic we use is
17664 that we only collapse consecutive entries for the same line if at least
17665 one of those entries has a non-zero discriminator. PR 17276.
17667 Note: Addresses in the line number state machine can never go backwards
17668 within one sequence, thus this coalescing is ok. */
17671 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17672 int line_has_non_zero_discriminator
,
17673 struct subfile
*last_subfile
)
17675 if (current_subfile
!= last_subfile
)
17677 if (line
!= last_line
)
17679 /* Same line for the same file that we've seen already.
17680 As a last check, for pr 17276, only record the line if the line
17681 has never had a non-zero discriminator. */
17682 if (!line_has_non_zero_discriminator
)
17687 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17688 in the line table of subfile SUBFILE. */
17691 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17692 unsigned int line
, CORE_ADDR address
,
17693 record_line_ftype p_record_line
)
17695 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17697 if (dwarf_line_debug
)
17699 fprintf_unfiltered (gdb_stdlog
,
17700 "Recording line %u, file %s, address %s\n",
17701 line
, lbasename (subfile
->name
),
17702 paddress (gdbarch
, address
));
17705 (*p_record_line
) (subfile
, line
, addr
);
17708 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17709 Mark the end of a set of line number records.
17710 The arguments are the same as for dwarf_record_line_1.
17711 If SUBFILE is NULL the request is ignored. */
17714 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17715 CORE_ADDR address
, record_line_ftype p_record_line
)
17717 if (subfile
== NULL
)
17720 if (dwarf_line_debug
)
17722 fprintf_unfiltered (gdb_stdlog
,
17723 "Finishing current line, file %s, address %s\n",
17724 lbasename (subfile
->name
),
17725 paddress (gdbarch
, address
));
17728 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17731 /* Record the line in STATE.
17732 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17735 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17738 const struct line_header
*lh
= reader
->line_header
;
17739 unsigned int file
, line
, discriminator
;
17742 file
= state
->file
;
17743 line
= state
->line
;
17744 is_stmt
= state
->is_stmt
;
17745 discriminator
= state
->discriminator
;
17747 if (dwarf_line_debug
)
17749 fprintf_unfiltered (gdb_stdlog
,
17750 "Processing actual line %u: file %u,"
17751 " address %s, is_stmt %u, discrim %u\n",
17753 paddress (reader
->gdbarch
, state
->address
),
17754 is_stmt
, discriminator
);
17757 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17758 dwarf2_debug_line_missing_file_complaint ();
17759 /* For now we ignore lines not starting on an instruction boundary.
17760 But not when processing end_sequence for compatibility with the
17761 previous version of the code. */
17762 else if (state
->op_index
== 0 || end_sequence
)
17764 lh
->file_names
[file
- 1].included_p
= 1;
17765 if (reader
->record_lines_p
&& is_stmt
)
17767 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17769 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17770 state
->address
, state
->record_line
);
17775 if (dwarf_record_line_p (line
, state
->last_line
,
17776 state
->line_has_non_zero_discriminator
,
17777 state
->last_subfile
))
17779 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17780 line
, state
->address
,
17781 state
->record_line
);
17783 state
->last_subfile
= current_subfile
;
17784 state
->last_line
= line
;
17790 /* Initialize STATE for the start of a line number program. */
17793 init_lnp_state_machine (lnp_state_machine
*state
,
17794 const lnp_reader_state
*reader
)
17796 memset (state
, 0, sizeof (*state
));
17798 /* Just starting, there is no "last file". */
17799 state
->last_file
= 0;
17800 state
->last_subfile
= NULL
;
17802 state
->record_line
= record_line
;
17804 state
->last_line
= 0;
17805 state
->line_has_non_zero_discriminator
= 0;
17807 /* Initialize these according to the DWARF spec. */
17808 state
->op_index
= 0;
17811 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17812 was a line entry for it so that the backend has a chance to adjust it
17813 and also record it in case it needs it. This is currently used by MIPS
17814 code, cf. `mips_adjust_dwarf2_line'. */
17815 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17816 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17817 state
->discriminator
= 0;
17820 /* Check address and if invalid nop-out the rest of the lines in this
17824 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17825 const gdb_byte
*line_ptr
,
17826 CORE_ADDR lowpc
, CORE_ADDR address
)
17828 /* If address < lowpc then it's not a usable value, it's outside the
17829 pc range of the CU. However, we restrict the test to only address
17830 values of zero to preserve GDB's previous behaviour which is to
17831 handle the specific case of a function being GC'd by the linker. */
17833 if (address
== 0 && address
< lowpc
)
17835 /* This line table is for a function which has been
17836 GCd by the linker. Ignore it. PR gdb/12528 */
17838 struct objfile
*objfile
= cu
->objfile
;
17839 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17841 complaint (&symfile_complaints
,
17842 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17843 line_offset
, objfile_name (objfile
));
17844 state
->record_line
= noop_record_line
;
17845 /* Note: sm.record_line is left as noop_record_line
17846 until we see DW_LNE_end_sequence. */
17850 /* Subroutine of dwarf_decode_lines to simplify it.
17851 Process the line number information in LH.
17852 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17853 program in order to set included_p for every referenced header. */
17856 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17857 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17859 const gdb_byte
*line_ptr
, *extended_end
;
17860 const gdb_byte
*line_end
;
17861 unsigned int bytes_read
, extended_len
;
17862 unsigned char op_code
, extended_op
;
17863 CORE_ADDR baseaddr
;
17864 struct objfile
*objfile
= cu
->objfile
;
17865 bfd
*abfd
= objfile
->obfd
;
17866 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17867 /* Non-zero if we're recording line info (as opposed to building partial
17869 int record_lines_p
= !decode_for_pst_p
;
17870 /* A collection of things we need to pass to dwarf_record_line. */
17871 lnp_reader_state reader_state
;
17873 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17875 line_ptr
= lh
->statement_program_start
;
17876 line_end
= lh
->statement_program_end
;
17878 reader_state
.gdbarch
= gdbarch
;
17879 reader_state
.line_header
= lh
;
17880 reader_state
.record_lines_p
= record_lines_p
;
17882 /* Read the statement sequences until there's nothing left. */
17883 while (line_ptr
< line_end
)
17885 /* The DWARF line number program state machine. */
17886 lnp_state_machine state_machine
;
17887 int end_sequence
= 0;
17889 /* Reset the state machine at the start of each sequence. */
17890 init_lnp_state_machine (&state_machine
, &reader_state
);
17892 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17894 /* Start a subfile for the current file of the state machine. */
17895 /* lh->include_dirs and lh->file_names are 0-based, but the
17896 directory and file name numbers in the statement program
17898 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17899 const char *dir
= NULL
;
17901 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17902 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17904 dwarf2_start_subfile (fe
->name
, dir
);
17907 /* Decode the table. */
17908 while (line_ptr
< line_end
&& !end_sequence
)
17910 op_code
= read_1_byte (abfd
, line_ptr
);
17913 if (op_code
>= lh
->opcode_base
)
17915 /* Special opcode. */
17916 unsigned char adj_opcode
;
17917 CORE_ADDR addr_adj
;
17920 adj_opcode
= op_code
- lh
->opcode_base
;
17921 addr_adj
= (((state_machine
.op_index
17922 + (adj_opcode
/ lh
->line_range
))
17923 / lh
->maximum_ops_per_instruction
)
17924 * lh
->minimum_instruction_length
);
17925 state_machine
.address
17926 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17927 state_machine
.op_index
= ((state_machine
.op_index
17928 + (adj_opcode
/ lh
->line_range
))
17929 % lh
->maximum_ops_per_instruction
);
17930 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17931 state_machine
.line
+= line_delta
;
17932 if (line_delta
!= 0)
17933 state_machine
.line_has_non_zero_discriminator
17934 = state_machine
.discriminator
!= 0;
17936 dwarf_record_line (&reader_state
, &state_machine
, 0);
17937 state_machine
.discriminator
= 0;
17939 else switch (op_code
)
17941 case DW_LNS_extended_op
:
17942 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17944 line_ptr
+= bytes_read
;
17945 extended_end
= line_ptr
+ extended_len
;
17946 extended_op
= read_1_byte (abfd
, line_ptr
);
17948 switch (extended_op
)
17950 case DW_LNE_end_sequence
:
17951 state_machine
.record_line
= record_line
;
17954 case DW_LNE_set_address
:
17957 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17959 line_ptr
+= bytes_read
;
17960 check_line_address (cu
, &state_machine
, line_ptr
,
17962 state_machine
.op_index
= 0;
17963 address
+= baseaddr
;
17964 state_machine
.address
17965 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17968 case DW_LNE_define_file
:
17970 const char *cur_file
;
17971 unsigned int dir_index
, mod_time
, length
;
17973 cur_file
= read_direct_string (abfd
, line_ptr
,
17975 line_ptr
+= bytes_read
;
17977 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17978 line_ptr
+= bytes_read
;
17980 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17981 line_ptr
+= bytes_read
;
17983 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17984 line_ptr
+= bytes_read
;
17985 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17988 case DW_LNE_set_discriminator
:
17989 /* The discriminator is not interesting to the debugger;
17990 just ignore it. We still need to check its value though:
17991 if there are consecutive entries for the same
17992 (non-prologue) line we want to coalesce them.
17994 state_machine
.discriminator
17995 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17996 state_machine
.line_has_non_zero_discriminator
17997 |= state_machine
.discriminator
!= 0;
17998 line_ptr
+= bytes_read
;
18001 complaint (&symfile_complaints
,
18002 _("mangled .debug_line section"));
18005 /* Make sure that we parsed the extended op correctly. If e.g.
18006 we expected a different address size than the producer used,
18007 we may have read the wrong number of bytes. */
18008 if (line_ptr
!= extended_end
)
18010 complaint (&symfile_complaints
,
18011 _("mangled .debug_line section"));
18016 dwarf_record_line (&reader_state
, &state_machine
, 0);
18017 state_machine
.discriminator
= 0;
18019 case DW_LNS_advance_pc
:
18022 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18023 CORE_ADDR addr_adj
;
18025 addr_adj
= (((state_machine
.op_index
+ adjust
)
18026 / lh
->maximum_ops_per_instruction
)
18027 * lh
->minimum_instruction_length
);
18028 state_machine
.address
18029 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18030 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18031 % lh
->maximum_ops_per_instruction
);
18032 line_ptr
+= bytes_read
;
18035 case DW_LNS_advance_line
:
18038 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
18040 state_machine
.line
+= line_delta
;
18041 if (line_delta
!= 0)
18042 state_machine
.line_has_non_zero_discriminator
18043 = state_machine
.discriminator
!= 0;
18044 line_ptr
+= bytes_read
;
18047 case DW_LNS_set_file
:
18049 /* The arrays lh->include_dirs and lh->file_names are
18050 0-based, but the directory and file name numbers in
18051 the statement program are 1-based. */
18052 struct file_entry
*fe
;
18053 const char *dir
= NULL
;
18055 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
18057 line_ptr
+= bytes_read
;
18058 if (state_machine
.file
== 0
18059 || state_machine
.file
- 1 >= lh
->num_file_names
)
18060 dwarf2_debug_line_missing_file_complaint ();
18063 fe
= &lh
->file_names
[state_machine
.file
- 1];
18064 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18065 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18066 if (record_lines_p
)
18068 state_machine
.last_subfile
= current_subfile
;
18069 state_machine
.line_has_non_zero_discriminator
18070 = state_machine
.discriminator
!= 0;
18071 dwarf2_start_subfile (fe
->name
, dir
);
18076 case DW_LNS_set_column
:
18077 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18078 line_ptr
+= bytes_read
;
18080 case DW_LNS_negate_stmt
:
18081 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18083 case DW_LNS_set_basic_block
:
18085 /* Add to the address register of the state machine the
18086 address increment value corresponding to special opcode
18087 255. I.e., this value is scaled by the minimum
18088 instruction length since special opcode 255 would have
18089 scaled the increment. */
18090 case DW_LNS_const_add_pc
:
18092 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18093 CORE_ADDR addr_adj
;
18095 addr_adj
= (((state_machine
.op_index
+ adjust
)
18096 / lh
->maximum_ops_per_instruction
)
18097 * lh
->minimum_instruction_length
);
18098 state_machine
.address
18099 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18100 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18101 % lh
->maximum_ops_per_instruction
);
18104 case DW_LNS_fixed_advance_pc
:
18106 CORE_ADDR addr_adj
;
18108 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18109 state_machine
.address
18110 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18111 state_machine
.op_index
= 0;
18117 /* Unknown standard opcode, ignore it. */
18120 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18122 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18123 line_ptr
+= bytes_read
;
18130 dwarf2_debug_line_missing_end_sequence_complaint ();
18132 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18133 in which case we still finish recording the last line). */
18134 dwarf_record_line (&reader_state
, &state_machine
, 1);
18138 /* Decode the Line Number Program (LNP) for the given line_header
18139 structure and CU. The actual information extracted and the type
18140 of structures created from the LNP depends on the value of PST.
18142 1. If PST is NULL, then this procedure uses the data from the program
18143 to create all necessary symbol tables, and their linetables.
18145 2. If PST is not NULL, this procedure reads the program to determine
18146 the list of files included by the unit represented by PST, and
18147 builds all the associated partial symbol tables.
18149 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18150 It is used for relative paths in the line table.
18151 NOTE: When processing partial symtabs (pst != NULL),
18152 comp_dir == pst->dirname.
18154 NOTE: It is important that psymtabs have the same file name (via strcmp)
18155 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18156 symtab we don't use it in the name of the psymtabs we create.
18157 E.g. expand_line_sal requires this when finding psymtabs to expand.
18158 A good testcase for this is mb-inline.exp.
18160 LOWPC is the lowest address in CU (or 0 if not known).
18162 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18163 for its PC<->lines mapping information. Otherwise only the filename
18164 table is read in. */
18167 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18168 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18169 CORE_ADDR lowpc
, int decode_mapping
)
18171 struct objfile
*objfile
= cu
->objfile
;
18172 const int decode_for_pst_p
= (pst
!= NULL
);
18174 if (decode_mapping
)
18175 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18177 if (decode_for_pst_p
)
18181 /* Now that we're done scanning the Line Header Program, we can
18182 create the psymtab of each included file. */
18183 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18184 if (lh
->file_names
[file_index
].included_p
== 1)
18186 const char *include_name
=
18187 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18188 if (include_name
!= NULL
)
18189 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18194 /* Make sure a symtab is created for every file, even files
18195 which contain only variables (i.e. no code with associated
18197 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18200 for (i
= 0; i
< lh
->num_file_names
; i
++)
18202 const char *dir
= NULL
;
18203 struct file_entry
*fe
;
18205 fe
= &lh
->file_names
[i
];
18206 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18207 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18208 dwarf2_start_subfile (fe
->name
, dir
);
18210 if (current_subfile
->symtab
== NULL
)
18212 current_subfile
->symtab
18213 = allocate_symtab (cust
, current_subfile
->name
);
18215 fe
->symtab
= current_subfile
->symtab
;
18220 /* Start a subfile for DWARF. FILENAME is the name of the file and
18221 DIRNAME the name of the source directory which contains FILENAME
18222 or NULL if not known.
18223 This routine tries to keep line numbers from identical absolute and
18224 relative file names in a common subfile.
18226 Using the `list' example from the GDB testsuite, which resides in
18227 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18228 of /srcdir/list0.c yields the following debugging information for list0.c:
18230 DW_AT_name: /srcdir/list0.c
18231 DW_AT_comp_dir: /compdir
18232 files.files[0].name: list0.h
18233 files.files[0].dir: /srcdir
18234 files.files[1].name: list0.c
18235 files.files[1].dir: /srcdir
18237 The line number information for list0.c has to end up in a single
18238 subfile, so that `break /srcdir/list0.c:1' works as expected.
18239 start_subfile will ensure that this happens provided that we pass the
18240 concatenation of files.files[1].dir and files.files[1].name as the
18244 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18248 /* In order not to lose the line information directory,
18249 we concatenate it to the filename when it makes sense.
18250 Note that the Dwarf3 standard says (speaking of filenames in line
18251 information): ``The directory index is ignored for file names
18252 that represent full path names''. Thus ignoring dirname in the
18253 `else' branch below isn't an issue. */
18255 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18257 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18261 start_subfile (filename
);
18267 /* Start a symtab for DWARF.
18268 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18270 static struct compunit_symtab
*
18271 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18272 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18274 struct compunit_symtab
*cust
18275 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18277 record_debugformat ("DWARF 2");
18278 record_producer (cu
->producer
);
18280 /* We assume that we're processing GCC output. */
18281 processing_gcc_compilation
= 2;
18283 cu
->processing_has_namespace_info
= 0;
18289 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18290 struct dwarf2_cu
*cu
)
18292 struct objfile
*objfile
= cu
->objfile
;
18293 struct comp_unit_head
*cu_header
= &cu
->header
;
18295 /* NOTE drow/2003-01-30: There used to be a comment and some special
18296 code here to turn a symbol with DW_AT_external and a
18297 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18298 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18299 with some versions of binutils) where shared libraries could have
18300 relocations against symbols in their debug information - the
18301 minimal symbol would have the right address, but the debug info
18302 would not. It's no longer necessary, because we will explicitly
18303 apply relocations when we read in the debug information now. */
18305 /* A DW_AT_location attribute with no contents indicates that a
18306 variable has been optimized away. */
18307 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18309 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18313 /* Handle one degenerate form of location expression specially, to
18314 preserve GDB's previous behavior when section offsets are
18315 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18316 then mark this symbol as LOC_STATIC. */
18318 if (attr_form_is_block (attr
)
18319 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18320 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18321 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18322 && (DW_BLOCK (attr
)->size
18323 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18325 unsigned int dummy
;
18327 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18328 SYMBOL_VALUE_ADDRESS (sym
) =
18329 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18331 SYMBOL_VALUE_ADDRESS (sym
) =
18332 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18333 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18334 fixup_symbol_section (sym
, objfile
);
18335 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18336 SYMBOL_SECTION (sym
));
18340 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18341 expression evaluator, and use LOC_COMPUTED only when necessary
18342 (i.e. when the value of a register or memory location is
18343 referenced, or a thread-local block, etc.). Then again, it might
18344 not be worthwhile. I'm assuming that it isn't unless performance
18345 or memory numbers show me otherwise. */
18347 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18349 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18350 cu
->has_loclist
= 1;
18353 /* Given a pointer to a DWARF information entry, figure out if we need
18354 to make a symbol table entry for it, and if so, create a new entry
18355 and return a pointer to it.
18356 If TYPE is NULL, determine symbol type from the die, otherwise
18357 used the passed type.
18358 If SPACE is not NULL, use it to hold the new symbol. If it is
18359 NULL, allocate a new symbol on the objfile's obstack. */
18361 static struct symbol
*
18362 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18363 struct symbol
*space
)
18365 struct objfile
*objfile
= cu
->objfile
;
18366 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18367 struct symbol
*sym
= NULL
;
18369 struct attribute
*attr
= NULL
;
18370 struct attribute
*attr2
= NULL
;
18371 CORE_ADDR baseaddr
;
18372 struct pending
**list_to_add
= NULL
;
18374 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18376 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18378 name
= dwarf2_name (die
, cu
);
18381 const char *linkagename
;
18382 int suppress_add
= 0;
18387 sym
= allocate_symbol (objfile
);
18388 OBJSTAT (objfile
, n_syms
++);
18390 /* Cache this symbol's name and the name's demangled form (if any). */
18391 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18392 linkagename
= dwarf2_physname (name
, die
, cu
);
18393 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18395 /* Fortran does not have mangling standard and the mangling does differ
18396 between gfortran, iFort etc. */
18397 if (cu
->language
== language_fortran
18398 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18399 symbol_set_demangled_name (&(sym
->ginfo
),
18400 dwarf2_full_name (name
, die
, cu
),
18403 /* Default assumptions.
18404 Use the passed type or decode it from the die. */
18405 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18406 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18408 SYMBOL_TYPE (sym
) = type
;
18410 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18411 attr
= dwarf2_attr (die
,
18412 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18416 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18419 attr
= dwarf2_attr (die
,
18420 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18424 int file_index
= DW_UNSND (attr
);
18426 if (cu
->line_header
== NULL
18427 || file_index
> cu
->line_header
->num_file_names
)
18428 complaint (&symfile_complaints
,
18429 _("file index out of range"));
18430 else if (file_index
> 0)
18432 struct file_entry
*fe
;
18434 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18435 symbol_set_symtab (sym
, fe
->symtab
);
18442 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18447 addr
= attr_value_as_address (attr
);
18448 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18449 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18451 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18452 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18453 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18454 add_symbol_to_list (sym
, cu
->list_in_scope
);
18456 case DW_TAG_subprogram
:
18457 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18459 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18460 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18461 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18462 || cu
->language
== language_ada
)
18464 /* Subprograms marked external are stored as a global symbol.
18465 Ada subprograms, whether marked external or not, are always
18466 stored as a global symbol, because we want to be able to
18467 access them globally. For instance, we want to be able
18468 to break on a nested subprogram without having to
18469 specify the context. */
18470 list_to_add
= &global_symbols
;
18474 list_to_add
= cu
->list_in_scope
;
18477 case DW_TAG_inlined_subroutine
:
18478 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18480 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18481 SYMBOL_INLINED (sym
) = 1;
18482 list_to_add
= cu
->list_in_scope
;
18484 case DW_TAG_template_value_param
:
18486 /* Fall through. */
18487 case DW_TAG_constant
:
18488 case DW_TAG_variable
:
18489 case DW_TAG_member
:
18490 /* Compilation with minimal debug info may result in
18491 variables with missing type entries. Change the
18492 misleading `void' type to something sensible. */
18493 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18495 = objfile_type (objfile
)->nodebug_data_symbol
;
18497 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18498 /* In the case of DW_TAG_member, we should only be called for
18499 static const members. */
18500 if (die
->tag
== DW_TAG_member
)
18502 /* dwarf2_add_field uses die_is_declaration,
18503 so we do the same. */
18504 gdb_assert (die_is_declaration (die
, cu
));
18509 dwarf2_const_value (attr
, sym
, cu
);
18510 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18513 if (attr2
&& (DW_UNSND (attr2
) != 0))
18514 list_to_add
= &global_symbols
;
18516 list_to_add
= cu
->list_in_scope
;
18520 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18523 var_decode_location (attr
, sym
, cu
);
18524 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18526 /* Fortran explicitly imports any global symbols to the local
18527 scope by DW_TAG_common_block. */
18528 if (cu
->language
== language_fortran
&& die
->parent
18529 && die
->parent
->tag
== DW_TAG_common_block
)
18532 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18533 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18534 && !dwarf2_per_objfile
->has_section_at_zero
)
18536 /* When a static variable is eliminated by the linker,
18537 the corresponding debug information is not stripped
18538 out, but the variable address is set to null;
18539 do not add such variables into symbol table. */
18541 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18543 /* Workaround gfortran PR debug/40040 - it uses
18544 DW_AT_location for variables in -fPIC libraries which may
18545 get overriden by other libraries/executable and get
18546 a different address. Resolve it by the minimal symbol
18547 which may come from inferior's executable using copy
18548 relocation. Make this workaround only for gfortran as for
18549 other compilers GDB cannot guess the minimal symbol
18550 Fortran mangling kind. */
18551 if (cu
->language
== language_fortran
&& die
->parent
18552 && die
->parent
->tag
== DW_TAG_module
18554 && startswith (cu
->producer
, "GNU Fortran"))
18555 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18557 /* A variable with DW_AT_external is never static,
18558 but it may be block-scoped. */
18559 list_to_add
= (cu
->list_in_scope
== &file_symbols
18560 ? &global_symbols
: cu
->list_in_scope
);
18563 list_to_add
= cu
->list_in_scope
;
18567 /* We do not know the address of this symbol.
18568 If it is an external symbol and we have type information
18569 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18570 The address of the variable will then be determined from
18571 the minimal symbol table whenever the variable is
18573 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18575 /* Fortran explicitly imports any global symbols to the local
18576 scope by DW_TAG_common_block. */
18577 if (cu
->language
== language_fortran
&& die
->parent
18578 && die
->parent
->tag
== DW_TAG_common_block
)
18580 /* SYMBOL_CLASS doesn't matter here because
18581 read_common_block is going to reset it. */
18583 list_to_add
= cu
->list_in_scope
;
18585 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18586 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18588 /* A variable with DW_AT_external is never static, but it
18589 may be block-scoped. */
18590 list_to_add
= (cu
->list_in_scope
== &file_symbols
18591 ? &global_symbols
: cu
->list_in_scope
);
18593 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18595 else if (!die_is_declaration (die
, cu
))
18597 /* Use the default LOC_OPTIMIZED_OUT class. */
18598 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18600 list_to_add
= cu
->list_in_scope
;
18604 case DW_TAG_formal_parameter
:
18605 /* If we are inside a function, mark this as an argument. If
18606 not, we might be looking at an argument to an inlined function
18607 when we do not have enough information to show inlined frames;
18608 pretend it's a local variable in that case so that the user can
18610 if (context_stack_depth
> 0
18611 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18612 SYMBOL_IS_ARGUMENT (sym
) = 1;
18613 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18616 var_decode_location (attr
, sym
, cu
);
18618 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18621 dwarf2_const_value (attr
, sym
, cu
);
18624 list_to_add
= cu
->list_in_scope
;
18626 case DW_TAG_unspecified_parameters
:
18627 /* From varargs functions; gdb doesn't seem to have any
18628 interest in this information, so just ignore it for now.
18631 case DW_TAG_template_type_param
:
18633 /* Fall through. */
18634 case DW_TAG_class_type
:
18635 case DW_TAG_interface_type
:
18636 case DW_TAG_structure_type
:
18637 case DW_TAG_union_type
:
18638 case DW_TAG_set_type
:
18639 case DW_TAG_enumeration_type
:
18640 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18641 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18644 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18645 really ever be static objects: otherwise, if you try
18646 to, say, break of a class's method and you're in a file
18647 which doesn't mention that class, it won't work unless
18648 the check for all static symbols in lookup_symbol_aux
18649 saves you. See the OtherFileClass tests in
18650 gdb.c++/namespace.exp. */
18654 list_to_add
= (cu
->list_in_scope
== &file_symbols
18655 && (cu
->language
== language_cplus
18656 || cu
->language
== language_java
)
18657 ? &global_symbols
: cu
->list_in_scope
);
18659 /* The semantics of C++ state that "struct foo {
18660 ... }" also defines a typedef for "foo". A Java
18661 class declaration also defines a typedef for the
18663 if (cu
->language
== language_cplus
18664 || cu
->language
== language_java
18665 || cu
->language
== language_ada
18666 || cu
->language
== language_d
18667 || cu
->language
== language_rust
)
18669 /* The symbol's name is already allocated along
18670 with this objfile, so we don't need to
18671 duplicate it for the type. */
18672 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18673 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18678 case DW_TAG_typedef
:
18679 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18680 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18681 list_to_add
= cu
->list_in_scope
;
18683 case DW_TAG_base_type
:
18684 case DW_TAG_subrange_type
:
18685 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18686 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18687 list_to_add
= cu
->list_in_scope
;
18689 case DW_TAG_enumerator
:
18690 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18693 dwarf2_const_value (attr
, sym
, cu
);
18696 /* NOTE: carlton/2003-11-10: See comment above in the
18697 DW_TAG_class_type, etc. block. */
18699 list_to_add
= (cu
->list_in_scope
== &file_symbols
18700 && (cu
->language
== language_cplus
18701 || cu
->language
== language_java
)
18702 ? &global_symbols
: cu
->list_in_scope
);
18705 case DW_TAG_imported_declaration
:
18706 case DW_TAG_namespace
:
18707 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18708 list_to_add
= &global_symbols
;
18710 case DW_TAG_module
:
18711 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18712 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18713 list_to_add
= &global_symbols
;
18715 case DW_TAG_common_block
:
18716 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18717 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18718 add_symbol_to_list (sym
, cu
->list_in_scope
);
18721 /* Not a tag we recognize. Hopefully we aren't processing
18722 trash data, but since we must specifically ignore things
18723 we don't recognize, there is nothing else we should do at
18725 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18726 dwarf_tag_name (die
->tag
));
18732 sym
->hash_next
= objfile
->template_symbols
;
18733 objfile
->template_symbols
= sym
;
18734 list_to_add
= NULL
;
18737 if (list_to_add
!= NULL
)
18738 add_symbol_to_list (sym
, list_to_add
);
18740 /* For the benefit of old versions of GCC, check for anonymous
18741 namespaces based on the demangled name. */
18742 if (!cu
->processing_has_namespace_info
18743 && cu
->language
== language_cplus
)
18744 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18749 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18751 static struct symbol
*
18752 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18754 return new_symbol_full (die
, type
, cu
, NULL
);
18757 /* Given an attr with a DW_FORM_dataN value in host byte order,
18758 zero-extend it as appropriate for the symbol's type. The DWARF
18759 standard (v4) is not entirely clear about the meaning of using
18760 DW_FORM_dataN for a constant with a signed type, where the type is
18761 wider than the data. The conclusion of a discussion on the DWARF
18762 list was that this is unspecified. We choose to always zero-extend
18763 because that is the interpretation long in use by GCC. */
18766 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18767 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18769 struct objfile
*objfile
= cu
->objfile
;
18770 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18771 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18772 LONGEST l
= DW_UNSND (attr
);
18774 if (bits
< sizeof (*value
) * 8)
18776 l
&= ((LONGEST
) 1 << bits
) - 1;
18779 else if (bits
== sizeof (*value
) * 8)
18783 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
18784 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18791 /* Read a constant value from an attribute. Either set *VALUE, or if
18792 the value does not fit in *VALUE, set *BYTES - either already
18793 allocated on the objfile obstack, or newly allocated on OBSTACK,
18794 or, set *BATON, if we translated the constant to a location
18798 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18799 const char *name
, struct obstack
*obstack
,
18800 struct dwarf2_cu
*cu
,
18801 LONGEST
*value
, const gdb_byte
**bytes
,
18802 struct dwarf2_locexpr_baton
**baton
)
18804 struct objfile
*objfile
= cu
->objfile
;
18805 struct comp_unit_head
*cu_header
= &cu
->header
;
18806 struct dwarf_block
*blk
;
18807 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18808 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18814 switch (attr
->form
)
18817 case DW_FORM_GNU_addr_index
:
18821 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18822 dwarf2_const_value_length_mismatch_complaint (name
,
18823 cu_header
->addr_size
,
18824 TYPE_LENGTH (type
));
18825 /* Symbols of this form are reasonably rare, so we just
18826 piggyback on the existing location code rather than writing
18827 a new implementation of symbol_computed_ops. */
18828 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
18829 (*baton
)->per_cu
= cu
->per_cu
;
18830 gdb_assert ((*baton
)->per_cu
);
18832 (*baton
)->size
= 2 + cu_header
->addr_size
;
18833 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
18834 (*baton
)->data
= data
;
18836 data
[0] = DW_OP_addr
;
18837 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18838 byte_order
, DW_ADDR (attr
));
18839 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18842 case DW_FORM_string
:
18844 case DW_FORM_GNU_str_index
:
18845 case DW_FORM_GNU_strp_alt
:
18846 /* DW_STRING is already allocated on the objfile obstack, point
18848 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18850 case DW_FORM_block1
:
18851 case DW_FORM_block2
:
18852 case DW_FORM_block4
:
18853 case DW_FORM_block
:
18854 case DW_FORM_exprloc
:
18855 blk
= DW_BLOCK (attr
);
18856 if (TYPE_LENGTH (type
) != blk
->size
)
18857 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18858 TYPE_LENGTH (type
));
18859 *bytes
= blk
->data
;
18862 /* The DW_AT_const_value attributes are supposed to carry the
18863 symbol's value "represented as it would be on the target
18864 architecture." By the time we get here, it's already been
18865 converted to host endianness, so we just need to sign- or
18866 zero-extend it as appropriate. */
18867 case DW_FORM_data1
:
18868 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18870 case DW_FORM_data2
:
18871 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18873 case DW_FORM_data4
:
18874 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18876 case DW_FORM_data8
:
18877 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18880 case DW_FORM_sdata
:
18881 *value
= DW_SND (attr
);
18884 case DW_FORM_udata
:
18885 *value
= DW_UNSND (attr
);
18889 complaint (&symfile_complaints
,
18890 _("unsupported const value attribute form: '%s'"),
18891 dwarf_form_name (attr
->form
));
18898 /* Copy constant value from an attribute to a symbol. */
18901 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18902 struct dwarf2_cu
*cu
)
18904 struct objfile
*objfile
= cu
->objfile
;
18906 const gdb_byte
*bytes
;
18907 struct dwarf2_locexpr_baton
*baton
;
18909 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18910 SYMBOL_PRINT_NAME (sym
),
18911 &objfile
->objfile_obstack
, cu
,
18912 &value
, &bytes
, &baton
);
18916 SYMBOL_LOCATION_BATON (sym
) = baton
;
18917 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18919 else if (bytes
!= NULL
)
18921 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18922 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18926 SYMBOL_VALUE (sym
) = value
;
18927 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18931 /* Return the type of the die in question using its DW_AT_type attribute. */
18933 static struct type
*
18934 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18936 struct attribute
*type_attr
;
18938 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18941 /* A missing DW_AT_type represents a void type. */
18942 return objfile_type (cu
->objfile
)->builtin_void
;
18945 return lookup_die_type (die
, type_attr
, cu
);
18948 /* True iff CU's producer generates GNAT Ada auxiliary information
18949 that allows to find parallel types through that information instead
18950 of having to do expensive parallel lookups by type name. */
18953 need_gnat_info (struct dwarf2_cu
*cu
)
18955 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18956 of GNAT produces this auxiliary information, without any indication
18957 that it is produced. Part of enhancing the FSF version of GNAT
18958 to produce that information will be to put in place an indicator
18959 that we can use in order to determine whether the descriptive type
18960 info is available or not. One suggestion that has been made is
18961 to use a new attribute, attached to the CU die. For now, assume
18962 that the descriptive type info is not available. */
18966 /* Return the auxiliary type of the die in question using its
18967 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18968 attribute is not present. */
18970 static struct type
*
18971 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18973 struct attribute
*type_attr
;
18975 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18979 return lookup_die_type (die
, type_attr
, cu
);
18982 /* If DIE has a descriptive_type attribute, then set the TYPE's
18983 descriptive type accordingly. */
18986 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18987 struct dwarf2_cu
*cu
)
18989 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18991 if (descriptive_type
)
18993 ALLOCATE_GNAT_AUX_TYPE (type
);
18994 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18998 /* Return the containing type of the die in question using its
18999 DW_AT_containing_type attribute. */
19001 static struct type
*
19002 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19004 struct attribute
*type_attr
;
19006 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
19008 error (_("Dwarf Error: Problem turning containing type into gdb type "
19009 "[in module %s]"), objfile_name (cu
->objfile
));
19011 return lookup_die_type (die
, type_attr
, cu
);
19014 /* Return an error marker type to use for the ill formed type in DIE/CU. */
19016 static struct type
*
19017 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
19019 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19020 char *message
, *saved
;
19022 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
19023 objfile_name (objfile
),
19024 cu
->header
.offset
.sect_off
,
19025 die
->offset
.sect_off
);
19026 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
19027 message
, strlen (message
));
19030 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
19033 /* Look up the type of DIE in CU using its type attribute ATTR.
19034 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
19035 DW_AT_containing_type.
19036 If there is no type substitute an error marker. */
19038 static struct type
*
19039 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
19040 struct dwarf2_cu
*cu
)
19042 struct objfile
*objfile
= cu
->objfile
;
19043 struct type
*this_type
;
19045 gdb_assert (attr
->name
== DW_AT_type
19046 || attr
->name
== DW_AT_GNAT_descriptive_type
19047 || attr
->name
== DW_AT_containing_type
);
19049 /* First see if we have it cached. */
19051 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19053 struct dwarf2_per_cu_data
*per_cu
;
19054 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19056 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
19057 this_type
= get_die_type_at_offset (offset
, per_cu
);
19059 else if (attr_form_is_ref (attr
))
19061 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19063 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
19065 else if (attr
->form
== DW_FORM_ref_sig8
)
19067 ULONGEST signature
= DW_SIGNATURE (attr
);
19069 return get_signatured_type (die
, signature
, cu
);
19073 complaint (&symfile_complaints
,
19074 _("Dwarf Error: Bad type attribute %s in DIE"
19075 " at 0x%x [in module %s]"),
19076 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
19077 objfile_name (objfile
));
19078 return build_error_marker_type (cu
, die
);
19081 /* If not cached we need to read it in. */
19083 if (this_type
== NULL
)
19085 struct die_info
*type_die
= NULL
;
19086 struct dwarf2_cu
*type_cu
= cu
;
19088 if (attr_form_is_ref (attr
))
19089 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19090 if (type_die
== NULL
)
19091 return build_error_marker_type (cu
, die
);
19092 /* If we find the type now, it's probably because the type came
19093 from an inter-CU reference and the type's CU got expanded before
19095 this_type
= read_type_die (type_die
, type_cu
);
19098 /* If we still don't have a type use an error marker. */
19100 if (this_type
== NULL
)
19101 return build_error_marker_type (cu
, die
);
19106 /* Return the type in DIE, CU.
19107 Returns NULL for invalid types.
19109 This first does a lookup in die_type_hash,
19110 and only reads the die in if necessary.
19112 NOTE: This can be called when reading in partial or full symbols. */
19114 static struct type
*
19115 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19117 struct type
*this_type
;
19119 this_type
= get_die_type (die
, cu
);
19123 return read_type_die_1 (die
, cu
);
19126 /* Read the type in DIE, CU.
19127 Returns NULL for invalid types. */
19129 static struct type
*
19130 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19132 struct type
*this_type
= NULL
;
19136 case DW_TAG_class_type
:
19137 case DW_TAG_interface_type
:
19138 case DW_TAG_structure_type
:
19139 case DW_TAG_union_type
:
19140 this_type
= read_structure_type (die
, cu
);
19142 case DW_TAG_enumeration_type
:
19143 this_type
= read_enumeration_type (die
, cu
);
19145 case DW_TAG_subprogram
:
19146 case DW_TAG_subroutine_type
:
19147 case DW_TAG_inlined_subroutine
:
19148 this_type
= read_subroutine_type (die
, cu
);
19150 case DW_TAG_array_type
:
19151 this_type
= read_array_type (die
, cu
);
19153 case DW_TAG_set_type
:
19154 this_type
= read_set_type (die
, cu
);
19156 case DW_TAG_pointer_type
:
19157 this_type
= read_tag_pointer_type (die
, cu
);
19159 case DW_TAG_ptr_to_member_type
:
19160 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19162 case DW_TAG_reference_type
:
19163 this_type
= read_tag_reference_type (die
, cu
);
19165 case DW_TAG_const_type
:
19166 this_type
= read_tag_const_type (die
, cu
);
19168 case DW_TAG_volatile_type
:
19169 this_type
= read_tag_volatile_type (die
, cu
);
19171 case DW_TAG_restrict_type
:
19172 this_type
= read_tag_restrict_type (die
, cu
);
19174 case DW_TAG_string_type
:
19175 this_type
= read_tag_string_type (die
, cu
);
19177 case DW_TAG_typedef
:
19178 this_type
= read_typedef (die
, cu
);
19180 case DW_TAG_subrange_type
:
19181 this_type
= read_subrange_type (die
, cu
);
19183 case DW_TAG_base_type
:
19184 this_type
= read_base_type (die
, cu
);
19186 case DW_TAG_unspecified_type
:
19187 this_type
= read_unspecified_type (die
, cu
);
19189 case DW_TAG_namespace
:
19190 this_type
= read_namespace_type (die
, cu
);
19192 case DW_TAG_module
:
19193 this_type
= read_module_type (die
, cu
);
19195 case DW_TAG_atomic_type
:
19196 this_type
= read_tag_atomic_type (die
, cu
);
19199 complaint (&symfile_complaints
,
19200 _("unexpected tag in read_type_die: '%s'"),
19201 dwarf_tag_name (die
->tag
));
19208 /* See if we can figure out if the class lives in a namespace. We do
19209 this by looking for a member function; its demangled name will
19210 contain namespace info, if there is any.
19211 Return the computed name or NULL.
19212 Space for the result is allocated on the objfile's obstack.
19213 This is the full-die version of guess_partial_die_structure_name.
19214 In this case we know DIE has no useful parent. */
19217 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19219 struct die_info
*spec_die
;
19220 struct dwarf2_cu
*spec_cu
;
19221 struct die_info
*child
;
19224 spec_die
= die_specification (die
, &spec_cu
);
19225 if (spec_die
!= NULL
)
19231 for (child
= die
->child
;
19233 child
= child
->sibling
)
19235 if (child
->tag
== DW_TAG_subprogram
)
19237 const char *linkage_name
;
19239 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19240 if (linkage_name
== NULL
)
19241 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19243 if (linkage_name
!= NULL
)
19246 = language_class_name_from_physname (cu
->language_defn
,
19250 if (actual_name
!= NULL
)
19252 const char *die_name
= dwarf2_name (die
, cu
);
19254 if (die_name
!= NULL
19255 && strcmp (die_name
, actual_name
) != 0)
19257 /* Strip off the class name from the full name.
19258 We want the prefix. */
19259 int die_name_len
= strlen (die_name
);
19260 int actual_name_len
= strlen (actual_name
);
19262 /* Test for '::' as a sanity check. */
19263 if (actual_name_len
> die_name_len
+ 2
19264 && actual_name
[actual_name_len
19265 - die_name_len
- 1] == ':')
19266 name
= (char *) obstack_copy0 (
19267 &cu
->objfile
->per_bfd
->storage_obstack
,
19268 actual_name
, actual_name_len
- die_name_len
- 2);
19271 xfree (actual_name
);
19280 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19281 prefix part in such case. See
19282 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19285 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19287 struct attribute
*attr
;
19290 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19291 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19294 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19297 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19299 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19300 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19303 /* dwarf2_name had to be already called. */
19304 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19306 /* Strip the base name, keep any leading namespaces/classes. */
19307 base
= strrchr (DW_STRING (attr
), ':');
19308 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19311 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19313 &base
[-1] - DW_STRING (attr
));
19316 /* Return the name of the namespace/class that DIE is defined within,
19317 or "" if we can't tell. The caller should not xfree the result.
19319 For example, if we're within the method foo() in the following
19329 then determine_prefix on foo's die will return "N::C". */
19331 static const char *
19332 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19334 struct die_info
*parent
, *spec_die
;
19335 struct dwarf2_cu
*spec_cu
;
19336 struct type
*parent_type
;
19339 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19340 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
19341 && cu
->language
!= language_rust
)
19344 retval
= anonymous_struct_prefix (die
, cu
);
19348 /* We have to be careful in the presence of DW_AT_specification.
19349 For example, with GCC 3.4, given the code
19353 // Definition of N::foo.
19357 then we'll have a tree of DIEs like this:
19359 1: DW_TAG_compile_unit
19360 2: DW_TAG_namespace // N
19361 3: DW_TAG_subprogram // declaration of N::foo
19362 4: DW_TAG_subprogram // definition of N::foo
19363 DW_AT_specification // refers to die #3
19365 Thus, when processing die #4, we have to pretend that we're in
19366 the context of its DW_AT_specification, namely the contex of die
19369 spec_die
= die_specification (die
, &spec_cu
);
19370 if (spec_die
== NULL
)
19371 parent
= die
->parent
;
19374 parent
= spec_die
->parent
;
19378 if (parent
== NULL
)
19380 else if (parent
->building_fullname
)
19383 const char *parent_name
;
19385 /* It has been seen on RealView 2.2 built binaries,
19386 DW_TAG_template_type_param types actually _defined_ as
19387 children of the parent class:
19390 template class <class Enum> Class{};
19391 Class<enum E> class_e;
19393 1: DW_TAG_class_type (Class)
19394 2: DW_TAG_enumeration_type (E)
19395 3: DW_TAG_enumerator (enum1:0)
19396 3: DW_TAG_enumerator (enum2:1)
19398 2: DW_TAG_template_type_param
19399 DW_AT_type DW_FORM_ref_udata (E)
19401 Besides being broken debug info, it can put GDB into an
19402 infinite loop. Consider:
19404 When we're building the full name for Class<E>, we'll start
19405 at Class, and go look over its template type parameters,
19406 finding E. We'll then try to build the full name of E, and
19407 reach here. We're now trying to build the full name of E,
19408 and look over the parent DIE for containing scope. In the
19409 broken case, if we followed the parent DIE of E, we'd again
19410 find Class, and once again go look at its template type
19411 arguments, etc., etc. Simply don't consider such parent die
19412 as source-level parent of this die (it can't be, the language
19413 doesn't allow it), and break the loop here. */
19414 name
= dwarf2_name (die
, cu
);
19415 parent_name
= dwarf2_name (parent
, cu
);
19416 complaint (&symfile_complaints
,
19417 _("template param type '%s' defined within parent '%s'"),
19418 name
? name
: "<unknown>",
19419 parent_name
? parent_name
: "<unknown>");
19423 switch (parent
->tag
)
19425 case DW_TAG_namespace
:
19426 parent_type
= read_type_die (parent
, cu
);
19427 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19428 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19429 Work around this problem here. */
19430 if (cu
->language
== language_cplus
19431 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19433 /* We give a name to even anonymous namespaces. */
19434 return TYPE_TAG_NAME (parent_type
);
19435 case DW_TAG_class_type
:
19436 case DW_TAG_interface_type
:
19437 case DW_TAG_structure_type
:
19438 case DW_TAG_union_type
:
19439 case DW_TAG_module
:
19440 parent_type
= read_type_die (parent
, cu
);
19441 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19442 return TYPE_TAG_NAME (parent_type
);
19444 /* An anonymous structure is only allowed non-static data
19445 members; no typedefs, no member functions, et cetera.
19446 So it does not need a prefix. */
19448 case DW_TAG_compile_unit
:
19449 case DW_TAG_partial_unit
:
19450 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19451 if (cu
->language
== language_cplus
19452 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19453 && die
->child
!= NULL
19454 && (die
->tag
== DW_TAG_class_type
19455 || die
->tag
== DW_TAG_structure_type
19456 || die
->tag
== DW_TAG_union_type
))
19458 char *name
= guess_full_die_structure_name (die
, cu
);
19463 case DW_TAG_enumeration_type
:
19464 parent_type
= read_type_die (parent
, cu
);
19465 if (TYPE_DECLARED_CLASS (parent_type
))
19467 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19468 return TYPE_TAG_NAME (parent_type
);
19471 /* Fall through. */
19473 return determine_prefix (parent
, cu
);
19477 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19478 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19479 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19480 an obconcat, otherwise allocate storage for the result. The CU argument is
19481 used to determine the language and hence, the appropriate separator. */
19483 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19486 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19487 int physname
, struct dwarf2_cu
*cu
)
19489 const char *lead
= "";
19492 if (suffix
== NULL
|| suffix
[0] == '\0'
19493 || prefix
== NULL
|| prefix
[0] == '\0')
19495 else if (cu
->language
== language_java
)
19497 else if (cu
->language
== language_d
)
19499 /* For D, the 'main' function could be defined in any module, but it
19500 should never be prefixed. */
19501 if (strcmp (suffix
, "D main") == 0)
19509 else if (cu
->language
== language_fortran
&& physname
)
19511 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19512 DW_AT_MIPS_linkage_name is preferred and used instead. */
19520 if (prefix
== NULL
)
19522 if (suffix
== NULL
)
19529 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19531 strcpy (retval
, lead
);
19532 strcat (retval
, prefix
);
19533 strcat (retval
, sep
);
19534 strcat (retval
, suffix
);
19539 /* We have an obstack. */
19540 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19544 /* Return sibling of die, NULL if no sibling. */
19546 static struct die_info
*
19547 sibling_die (struct die_info
*die
)
19549 return die
->sibling
;
19552 /* Get name of a die, return NULL if not found. */
19554 static const char *
19555 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19556 struct obstack
*obstack
)
19558 if (name
&& cu
->language
== language_cplus
)
19560 char *canon_name
= cp_canonicalize_string (name
);
19562 if (canon_name
!= NULL
)
19564 if (strcmp (canon_name
, name
) != 0)
19565 name
= (const char *) obstack_copy0 (obstack
, canon_name
,
19566 strlen (canon_name
));
19567 xfree (canon_name
);
19574 /* Get name of a die, return NULL if not found.
19575 Anonymous namespaces are converted to their magic string. */
19577 static const char *
19578 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19580 struct attribute
*attr
;
19582 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19583 if ((!attr
|| !DW_STRING (attr
))
19584 && die
->tag
!= DW_TAG_namespace
19585 && die
->tag
!= DW_TAG_class_type
19586 && die
->tag
!= DW_TAG_interface_type
19587 && die
->tag
!= DW_TAG_structure_type
19588 && die
->tag
!= DW_TAG_union_type
)
19593 case DW_TAG_compile_unit
:
19594 case DW_TAG_partial_unit
:
19595 /* Compilation units have a DW_AT_name that is a filename, not
19596 a source language identifier. */
19597 case DW_TAG_enumeration_type
:
19598 case DW_TAG_enumerator
:
19599 /* These tags always have simple identifiers already; no need
19600 to canonicalize them. */
19601 return DW_STRING (attr
);
19603 case DW_TAG_namespace
:
19604 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19605 return DW_STRING (attr
);
19606 return CP_ANONYMOUS_NAMESPACE_STR
;
19608 case DW_TAG_subprogram
:
19609 /* Java constructors will all be named "<init>", so return
19610 the class name when we see this special case. */
19611 if (cu
->language
== language_java
19612 && DW_STRING (attr
) != NULL
19613 && strcmp (DW_STRING (attr
), "<init>") == 0)
19615 struct dwarf2_cu
*spec_cu
= cu
;
19616 struct die_info
*spec_die
;
19618 /* GCJ will output '<init>' for Java constructor names.
19619 For this special case, return the name of the parent class. */
19621 /* GCJ may output subprogram DIEs with AT_specification set.
19622 If so, use the name of the specified DIE. */
19623 spec_die
= die_specification (die
, &spec_cu
);
19624 if (spec_die
!= NULL
)
19625 return dwarf2_name (spec_die
, spec_cu
);
19630 if (die
->tag
== DW_TAG_class_type
)
19631 return dwarf2_name (die
, cu
);
19633 while (die
->tag
!= DW_TAG_compile_unit
19634 && die
->tag
!= DW_TAG_partial_unit
);
19638 case DW_TAG_class_type
:
19639 case DW_TAG_interface_type
:
19640 case DW_TAG_structure_type
:
19641 case DW_TAG_union_type
:
19642 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19643 structures or unions. These were of the form "._%d" in GCC 4.1,
19644 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19645 and GCC 4.4. We work around this problem by ignoring these. */
19646 if (attr
&& DW_STRING (attr
)
19647 && (startswith (DW_STRING (attr
), "._")
19648 || startswith (DW_STRING (attr
), "<anonymous")))
19651 /* GCC might emit a nameless typedef that has a linkage name. See
19652 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19653 if (!attr
|| DW_STRING (attr
) == NULL
)
19655 char *demangled
= NULL
;
19657 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19659 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19661 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19664 /* Avoid demangling DW_STRING (attr) the second time on a second
19665 call for the same DIE. */
19666 if (!DW_STRING_IS_CANONICAL (attr
))
19667 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19673 /* FIXME: we already did this for the partial symbol... */
19676 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19677 demangled
, strlen (demangled
)));
19678 DW_STRING_IS_CANONICAL (attr
) = 1;
19681 /* Strip any leading namespaces/classes, keep only the base name.
19682 DW_AT_name for named DIEs does not contain the prefixes. */
19683 base
= strrchr (DW_STRING (attr
), ':');
19684 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19687 return DW_STRING (attr
);
19696 if (!DW_STRING_IS_CANONICAL (attr
))
19699 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19700 &cu
->objfile
->per_bfd
->storage_obstack
);
19701 DW_STRING_IS_CANONICAL (attr
) = 1;
19703 return DW_STRING (attr
);
19706 /* Return the die that this die in an extension of, or NULL if there
19707 is none. *EXT_CU is the CU containing DIE on input, and the CU
19708 containing the return value on output. */
19710 static struct die_info
*
19711 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19713 struct attribute
*attr
;
19715 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19719 return follow_die_ref (die
, attr
, ext_cu
);
19722 /* Convert a DIE tag into its string name. */
19724 static const char *
19725 dwarf_tag_name (unsigned tag
)
19727 const char *name
= get_DW_TAG_name (tag
);
19730 return "DW_TAG_<unknown>";
19735 /* Convert a DWARF attribute code into its string name. */
19737 static const char *
19738 dwarf_attr_name (unsigned attr
)
19742 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19743 if (attr
== DW_AT_MIPS_fde
)
19744 return "DW_AT_MIPS_fde";
19746 if (attr
== DW_AT_HP_block_index
)
19747 return "DW_AT_HP_block_index";
19750 name
= get_DW_AT_name (attr
);
19753 return "DW_AT_<unknown>";
19758 /* Convert a DWARF value form code into its string name. */
19760 static const char *
19761 dwarf_form_name (unsigned form
)
19763 const char *name
= get_DW_FORM_name (form
);
19766 return "DW_FORM_<unknown>";
19772 dwarf_bool_name (unsigned mybool
)
19780 /* Convert a DWARF type code into its string name. */
19782 static const char *
19783 dwarf_type_encoding_name (unsigned enc
)
19785 const char *name
= get_DW_ATE_name (enc
);
19788 return "DW_ATE_<unknown>";
19794 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19798 print_spaces (indent
, f
);
19799 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19800 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19802 if (die
->parent
!= NULL
)
19804 print_spaces (indent
, f
);
19805 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19806 die
->parent
->offset
.sect_off
);
19809 print_spaces (indent
, f
);
19810 fprintf_unfiltered (f
, " has children: %s\n",
19811 dwarf_bool_name (die
->child
!= NULL
));
19813 print_spaces (indent
, f
);
19814 fprintf_unfiltered (f
, " attributes:\n");
19816 for (i
= 0; i
< die
->num_attrs
; ++i
)
19818 print_spaces (indent
, f
);
19819 fprintf_unfiltered (f
, " %s (%s) ",
19820 dwarf_attr_name (die
->attrs
[i
].name
),
19821 dwarf_form_name (die
->attrs
[i
].form
));
19823 switch (die
->attrs
[i
].form
)
19826 case DW_FORM_GNU_addr_index
:
19827 fprintf_unfiltered (f
, "address: ");
19828 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19830 case DW_FORM_block2
:
19831 case DW_FORM_block4
:
19832 case DW_FORM_block
:
19833 case DW_FORM_block1
:
19834 fprintf_unfiltered (f
, "block: size %s",
19835 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19837 case DW_FORM_exprloc
:
19838 fprintf_unfiltered (f
, "expression: size %s",
19839 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19841 case DW_FORM_ref_addr
:
19842 fprintf_unfiltered (f
, "ref address: ");
19843 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19845 case DW_FORM_GNU_ref_alt
:
19846 fprintf_unfiltered (f
, "alt ref address: ");
19847 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19853 case DW_FORM_ref_udata
:
19854 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19855 (long) (DW_UNSND (&die
->attrs
[i
])));
19857 case DW_FORM_data1
:
19858 case DW_FORM_data2
:
19859 case DW_FORM_data4
:
19860 case DW_FORM_data8
:
19861 case DW_FORM_udata
:
19862 case DW_FORM_sdata
:
19863 fprintf_unfiltered (f
, "constant: %s",
19864 pulongest (DW_UNSND (&die
->attrs
[i
])));
19866 case DW_FORM_sec_offset
:
19867 fprintf_unfiltered (f
, "section offset: %s",
19868 pulongest (DW_UNSND (&die
->attrs
[i
])));
19870 case DW_FORM_ref_sig8
:
19871 fprintf_unfiltered (f
, "signature: %s",
19872 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19874 case DW_FORM_string
:
19876 case DW_FORM_GNU_str_index
:
19877 case DW_FORM_GNU_strp_alt
:
19878 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19879 DW_STRING (&die
->attrs
[i
])
19880 ? DW_STRING (&die
->attrs
[i
]) : "",
19881 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19884 if (DW_UNSND (&die
->attrs
[i
]))
19885 fprintf_unfiltered (f
, "flag: TRUE");
19887 fprintf_unfiltered (f
, "flag: FALSE");
19889 case DW_FORM_flag_present
:
19890 fprintf_unfiltered (f
, "flag: TRUE");
19892 case DW_FORM_indirect
:
19893 /* The reader will have reduced the indirect form to
19894 the "base form" so this form should not occur. */
19895 fprintf_unfiltered (f
,
19896 "unexpected attribute form: DW_FORM_indirect");
19899 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19900 die
->attrs
[i
].form
);
19903 fprintf_unfiltered (f
, "\n");
19908 dump_die_for_error (struct die_info
*die
)
19910 dump_die_shallow (gdb_stderr
, 0, die
);
19914 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19916 int indent
= level
* 4;
19918 gdb_assert (die
!= NULL
);
19920 if (level
>= max_level
)
19923 dump_die_shallow (f
, indent
, die
);
19925 if (die
->child
!= NULL
)
19927 print_spaces (indent
, f
);
19928 fprintf_unfiltered (f
, " Children:");
19929 if (level
+ 1 < max_level
)
19931 fprintf_unfiltered (f
, "\n");
19932 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19936 fprintf_unfiltered (f
,
19937 " [not printed, max nesting level reached]\n");
19941 if (die
->sibling
!= NULL
&& level
> 0)
19943 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19947 /* This is called from the pdie macro in gdbinit.in.
19948 It's not static so gcc will keep a copy callable from gdb. */
19951 dump_die (struct die_info
*die
, int max_level
)
19953 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19957 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19961 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19967 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19971 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19973 sect_offset retval
= { DW_UNSND (attr
) };
19975 if (attr_form_is_ref (attr
))
19978 retval
.sect_off
= 0;
19979 complaint (&symfile_complaints
,
19980 _("unsupported die ref attribute form: '%s'"),
19981 dwarf_form_name (attr
->form
));
19985 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19986 * the value held by the attribute is not constant. */
19989 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19991 if (attr
->form
== DW_FORM_sdata
)
19992 return DW_SND (attr
);
19993 else if (attr
->form
== DW_FORM_udata
19994 || attr
->form
== DW_FORM_data1
19995 || attr
->form
== DW_FORM_data2
19996 || attr
->form
== DW_FORM_data4
19997 || attr
->form
== DW_FORM_data8
)
19998 return DW_UNSND (attr
);
20001 complaint (&symfile_complaints
,
20002 _("Attribute value is not a constant (%s)"),
20003 dwarf_form_name (attr
->form
));
20004 return default_value
;
20008 /* Follow reference or signature attribute ATTR of SRC_DIE.
20009 On entry *REF_CU is the CU of SRC_DIE.
20010 On exit *REF_CU is the CU of the result. */
20012 static struct die_info
*
20013 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20014 struct dwarf2_cu
**ref_cu
)
20016 struct die_info
*die
;
20018 if (attr_form_is_ref (attr
))
20019 die
= follow_die_ref (src_die
, attr
, ref_cu
);
20020 else if (attr
->form
== DW_FORM_ref_sig8
)
20021 die
= follow_die_sig (src_die
, attr
, ref_cu
);
20024 dump_die_for_error (src_die
);
20025 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
20026 objfile_name ((*ref_cu
)->objfile
));
20032 /* Follow reference OFFSET.
20033 On entry *REF_CU is the CU of the source die referencing OFFSET.
20034 On exit *REF_CU is the CU of the result.
20035 Returns NULL if OFFSET is invalid. */
20037 static struct die_info
*
20038 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
20039 struct dwarf2_cu
**ref_cu
)
20041 struct die_info temp_die
;
20042 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
20044 gdb_assert (cu
->per_cu
!= NULL
);
20048 if (cu
->per_cu
->is_debug_types
)
20050 /* .debug_types CUs cannot reference anything outside their CU.
20051 If they need to, they have to reference a signatured type via
20052 DW_FORM_ref_sig8. */
20053 if (! offset_in_cu_p (&cu
->header
, offset
))
20056 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
20057 || ! offset_in_cu_p (&cu
->header
, offset
))
20059 struct dwarf2_per_cu_data
*per_cu
;
20061 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
20064 /* If necessary, add it to the queue and load its DIEs. */
20065 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
20066 load_full_comp_unit (per_cu
, cu
->language
);
20068 target_cu
= per_cu
->cu
;
20070 else if (cu
->dies
== NULL
)
20072 /* We're loading full DIEs during partial symbol reading. */
20073 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20074 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20077 *ref_cu
= target_cu
;
20078 temp_die
.offset
= offset
;
20079 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20080 &temp_die
, offset
.sect_off
);
20083 /* Follow reference attribute ATTR of SRC_DIE.
20084 On entry *REF_CU is the CU of SRC_DIE.
20085 On exit *REF_CU is the CU of the result. */
20087 static struct die_info
*
20088 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20089 struct dwarf2_cu
**ref_cu
)
20091 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20092 struct dwarf2_cu
*cu
= *ref_cu
;
20093 struct die_info
*die
;
20095 die
= follow_die_offset (offset
,
20096 (attr
->form
== DW_FORM_GNU_ref_alt
20097 || cu
->per_cu
->is_dwz
),
20100 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20101 "at 0x%x [in module %s]"),
20102 offset
.sect_off
, src_die
->offset
.sect_off
,
20103 objfile_name (cu
->objfile
));
20108 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20109 Returned value is intended for DW_OP_call*. Returned
20110 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20112 struct dwarf2_locexpr_baton
20113 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20114 struct dwarf2_per_cu_data
*per_cu
,
20115 CORE_ADDR (*get_frame_pc
) (void *baton
),
20118 struct dwarf2_cu
*cu
;
20119 struct die_info
*die
;
20120 struct attribute
*attr
;
20121 struct dwarf2_locexpr_baton retval
;
20123 dw2_setup (per_cu
->objfile
);
20125 if (per_cu
->cu
== NULL
)
20130 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20131 Instead just throw an error, not much else we can do. */
20132 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20133 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20136 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20138 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20139 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20141 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20144 /* DWARF: "If there is no such attribute, then there is no effect.".
20145 DATA is ignored if SIZE is 0. */
20147 retval
.data
= NULL
;
20150 else if (attr_form_is_section_offset (attr
))
20152 struct dwarf2_loclist_baton loclist_baton
;
20153 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20156 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20158 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20160 retval
.size
= size
;
20164 if (!attr_form_is_block (attr
))
20165 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20166 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20167 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20169 retval
.data
= DW_BLOCK (attr
)->data
;
20170 retval
.size
= DW_BLOCK (attr
)->size
;
20172 retval
.per_cu
= cu
->per_cu
;
20174 age_cached_comp_units ();
20179 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20182 struct dwarf2_locexpr_baton
20183 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20184 struct dwarf2_per_cu_data
*per_cu
,
20185 CORE_ADDR (*get_frame_pc
) (void *baton
),
20188 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20190 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20193 /* Write a constant of a given type as target-ordered bytes into
20196 static const gdb_byte
*
20197 write_constant_as_bytes (struct obstack
*obstack
,
20198 enum bfd_endian byte_order
,
20205 *len
= TYPE_LENGTH (type
);
20206 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20207 store_unsigned_integer (result
, *len
, byte_order
, value
);
20212 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20213 pointer to the constant bytes and set LEN to the length of the
20214 data. If memory is needed, allocate it on OBSTACK. If the DIE
20215 does not have a DW_AT_const_value, return NULL. */
20218 dwarf2_fetch_constant_bytes (sect_offset offset
,
20219 struct dwarf2_per_cu_data
*per_cu
,
20220 struct obstack
*obstack
,
20223 struct dwarf2_cu
*cu
;
20224 struct die_info
*die
;
20225 struct attribute
*attr
;
20226 const gdb_byte
*result
= NULL
;
20229 enum bfd_endian byte_order
;
20231 dw2_setup (per_cu
->objfile
);
20233 if (per_cu
->cu
== NULL
)
20238 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20239 Instead just throw an error, not much else we can do. */
20240 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20241 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20244 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20246 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20247 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20250 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20254 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20255 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20257 switch (attr
->form
)
20260 case DW_FORM_GNU_addr_index
:
20264 *len
= cu
->header
.addr_size
;
20265 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20266 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20270 case DW_FORM_string
:
20272 case DW_FORM_GNU_str_index
:
20273 case DW_FORM_GNU_strp_alt
:
20274 /* DW_STRING is already allocated on the objfile obstack, point
20276 result
= (const gdb_byte
*) DW_STRING (attr
);
20277 *len
= strlen (DW_STRING (attr
));
20279 case DW_FORM_block1
:
20280 case DW_FORM_block2
:
20281 case DW_FORM_block4
:
20282 case DW_FORM_block
:
20283 case DW_FORM_exprloc
:
20284 result
= DW_BLOCK (attr
)->data
;
20285 *len
= DW_BLOCK (attr
)->size
;
20288 /* The DW_AT_const_value attributes are supposed to carry the
20289 symbol's value "represented as it would be on the target
20290 architecture." By the time we get here, it's already been
20291 converted to host endianness, so we just need to sign- or
20292 zero-extend it as appropriate. */
20293 case DW_FORM_data1
:
20294 type
= die_type (die
, cu
);
20295 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20296 if (result
== NULL
)
20297 result
= write_constant_as_bytes (obstack
, byte_order
,
20300 case DW_FORM_data2
:
20301 type
= die_type (die
, cu
);
20302 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20303 if (result
== NULL
)
20304 result
= write_constant_as_bytes (obstack
, byte_order
,
20307 case DW_FORM_data4
:
20308 type
= die_type (die
, cu
);
20309 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20310 if (result
== NULL
)
20311 result
= write_constant_as_bytes (obstack
, byte_order
,
20314 case DW_FORM_data8
:
20315 type
= die_type (die
, cu
);
20316 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20317 if (result
== NULL
)
20318 result
= write_constant_as_bytes (obstack
, byte_order
,
20322 case DW_FORM_sdata
:
20323 type
= die_type (die
, cu
);
20324 result
= write_constant_as_bytes (obstack
, byte_order
,
20325 type
, DW_SND (attr
), len
);
20328 case DW_FORM_udata
:
20329 type
= die_type (die
, cu
);
20330 result
= write_constant_as_bytes (obstack
, byte_order
,
20331 type
, DW_UNSND (attr
), len
);
20335 complaint (&symfile_complaints
,
20336 _("unsupported const value attribute form: '%s'"),
20337 dwarf_form_name (attr
->form
));
20344 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20348 dwarf2_get_die_type (cu_offset die_offset
,
20349 struct dwarf2_per_cu_data
*per_cu
)
20351 sect_offset die_offset_sect
;
20353 dw2_setup (per_cu
->objfile
);
20355 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20356 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20359 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20360 On entry *REF_CU is the CU of SRC_DIE.
20361 On exit *REF_CU is the CU of the result.
20362 Returns NULL if the referenced DIE isn't found. */
20364 static struct die_info
*
20365 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20366 struct dwarf2_cu
**ref_cu
)
20368 struct die_info temp_die
;
20369 struct dwarf2_cu
*sig_cu
;
20370 struct die_info
*die
;
20372 /* While it might be nice to assert sig_type->type == NULL here,
20373 we can get here for DW_AT_imported_declaration where we need
20374 the DIE not the type. */
20376 /* If necessary, add it to the queue and load its DIEs. */
20378 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20379 read_signatured_type (sig_type
);
20381 sig_cu
= sig_type
->per_cu
.cu
;
20382 gdb_assert (sig_cu
!= NULL
);
20383 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20384 temp_die
.offset
= sig_type
->type_offset_in_section
;
20385 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20386 temp_die
.offset
.sect_off
);
20389 /* For .gdb_index version 7 keep track of included TUs.
20390 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20391 if (dwarf2_per_objfile
->index_table
!= NULL
20392 && dwarf2_per_objfile
->index_table
->version
<= 7)
20394 VEC_safe_push (dwarf2_per_cu_ptr
,
20395 (*ref_cu
)->per_cu
->imported_symtabs
,
20406 /* Follow signatured type referenced by ATTR in SRC_DIE.
20407 On entry *REF_CU is the CU of SRC_DIE.
20408 On exit *REF_CU is the CU of the result.
20409 The result is the DIE of the type.
20410 If the referenced type cannot be found an error is thrown. */
20412 static struct die_info
*
20413 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20414 struct dwarf2_cu
**ref_cu
)
20416 ULONGEST signature
= DW_SIGNATURE (attr
);
20417 struct signatured_type
*sig_type
;
20418 struct die_info
*die
;
20420 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20422 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20423 /* sig_type will be NULL if the signatured type is missing from
20425 if (sig_type
== NULL
)
20427 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20428 " from DIE at 0x%x [in module %s]"),
20429 hex_string (signature
), src_die
->offset
.sect_off
,
20430 objfile_name ((*ref_cu
)->objfile
));
20433 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20436 dump_die_for_error (src_die
);
20437 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20438 " from DIE at 0x%x [in module %s]"),
20439 hex_string (signature
), src_die
->offset
.sect_off
,
20440 objfile_name ((*ref_cu
)->objfile
));
20446 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20447 reading in and processing the type unit if necessary. */
20449 static struct type
*
20450 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20451 struct dwarf2_cu
*cu
)
20453 struct signatured_type
*sig_type
;
20454 struct dwarf2_cu
*type_cu
;
20455 struct die_info
*type_die
;
20458 sig_type
= lookup_signatured_type (cu
, signature
);
20459 /* sig_type will be NULL if the signatured type is missing from
20461 if (sig_type
== NULL
)
20463 complaint (&symfile_complaints
,
20464 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20465 " from DIE at 0x%x [in module %s]"),
20466 hex_string (signature
), die
->offset
.sect_off
,
20467 objfile_name (dwarf2_per_objfile
->objfile
));
20468 return build_error_marker_type (cu
, die
);
20471 /* If we already know the type we're done. */
20472 if (sig_type
->type
!= NULL
)
20473 return sig_type
->type
;
20476 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20477 if (type_die
!= NULL
)
20479 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20480 is created. This is important, for example, because for c++ classes
20481 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20482 type
= read_type_die (type_die
, type_cu
);
20485 complaint (&symfile_complaints
,
20486 _("Dwarf Error: Cannot build signatured type %s"
20487 " referenced from DIE at 0x%x [in module %s]"),
20488 hex_string (signature
), die
->offset
.sect_off
,
20489 objfile_name (dwarf2_per_objfile
->objfile
));
20490 type
= build_error_marker_type (cu
, die
);
20495 complaint (&symfile_complaints
,
20496 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20497 " from DIE at 0x%x [in module %s]"),
20498 hex_string (signature
), die
->offset
.sect_off
,
20499 objfile_name (dwarf2_per_objfile
->objfile
));
20500 type
= build_error_marker_type (cu
, die
);
20502 sig_type
->type
= type
;
20507 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20508 reading in and processing the type unit if necessary. */
20510 static struct type
*
20511 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20512 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20514 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20515 if (attr_form_is_ref (attr
))
20517 struct dwarf2_cu
*type_cu
= cu
;
20518 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20520 return read_type_die (type_die
, type_cu
);
20522 else if (attr
->form
== DW_FORM_ref_sig8
)
20524 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20528 complaint (&symfile_complaints
,
20529 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20530 " at 0x%x [in module %s]"),
20531 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20532 objfile_name (dwarf2_per_objfile
->objfile
));
20533 return build_error_marker_type (cu
, die
);
20537 /* Load the DIEs associated with type unit PER_CU into memory. */
20540 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20542 struct signatured_type
*sig_type
;
20544 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20545 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20547 /* We have the per_cu, but we need the signatured_type.
20548 Fortunately this is an easy translation. */
20549 gdb_assert (per_cu
->is_debug_types
);
20550 sig_type
= (struct signatured_type
*) per_cu
;
20552 gdb_assert (per_cu
->cu
== NULL
);
20554 read_signatured_type (sig_type
);
20556 gdb_assert (per_cu
->cu
!= NULL
);
20559 /* die_reader_func for read_signatured_type.
20560 This is identical to load_full_comp_unit_reader,
20561 but is kept separate for now. */
20564 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20565 const gdb_byte
*info_ptr
,
20566 struct die_info
*comp_unit_die
,
20570 struct dwarf2_cu
*cu
= reader
->cu
;
20572 gdb_assert (cu
->die_hash
== NULL
);
20574 htab_create_alloc_ex (cu
->header
.length
/ 12,
20578 &cu
->comp_unit_obstack
,
20579 hashtab_obstack_allocate
,
20580 dummy_obstack_deallocate
);
20583 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20584 &info_ptr
, comp_unit_die
);
20585 cu
->dies
= comp_unit_die
;
20586 /* comp_unit_die is not stored in die_hash, no need. */
20588 /* We try not to read any attributes in this function, because not
20589 all CUs needed for references have been loaded yet, and symbol
20590 table processing isn't initialized. But we have to set the CU language,
20591 or we won't be able to build types correctly.
20592 Similarly, if we do not read the producer, we can not apply
20593 producer-specific interpretation. */
20594 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20597 /* Read in a signatured type and build its CU and DIEs.
20598 If the type is a stub for the real type in a DWO file,
20599 read in the real type from the DWO file as well. */
20602 read_signatured_type (struct signatured_type
*sig_type
)
20604 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20606 gdb_assert (per_cu
->is_debug_types
);
20607 gdb_assert (per_cu
->cu
== NULL
);
20609 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20610 read_signatured_type_reader
, NULL
);
20611 sig_type
->per_cu
.tu_read
= 1;
20614 /* Decode simple location descriptions.
20615 Given a pointer to a dwarf block that defines a location, compute
20616 the location and return the value.
20618 NOTE drow/2003-11-18: This function is called in two situations
20619 now: for the address of static or global variables (partial symbols
20620 only) and for offsets into structures which are expected to be
20621 (more or less) constant. The partial symbol case should go away,
20622 and only the constant case should remain. That will let this
20623 function complain more accurately. A few special modes are allowed
20624 without complaint for global variables (for instance, global
20625 register values and thread-local values).
20627 A location description containing no operations indicates that the
20628 object is optimized out. The return value is 0 for that case.
20629 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20630 callers will only want a very basic result and this can become a
20633 Note that stack[0] is unused except as a default error return. */
20636 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20638 struct objfile
*objfile
= cu
->objfile
;
20640 size_t size
= blk
->size
;
20641 const gdb_byte
*data
= blk
->data
;
20642 CORE_ADDR stack
[64];
20644 unsigned int bytes_read
, unsnd
;
20650 stack
[++stacki
] = 0;
20689 stack
[++stacki
] = op
- DW_OP_lit0
;
20724 stack
[++stacki
] = op
- DW_OP_reg0
;
20726 dwarf2_complex_location_expr_complaint ();
20730 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20732 stack
[++stacki
] = unsnd
;
20734 dwarf2_complex_location_expr_complaint ();
20738 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20743 case DW_OP_const1u
:
20744 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20748 case DW_OP_const1s
:
20749 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20753 case DW_OP_const2u
:
20754 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20758 case DW_OP_const2s
:
20759 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20763 case DW_OP_const4u
:
20764 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20768 case DW_OP_const4s
:
20769 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20773 case DW_OP_const8u
:
20774 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20779 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20785 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20790 stack
[stacki
+ 1] = stack
[stacki
];
20795 stack
[stacki
- 1] += stack
[stacki
];
20799 case DW_OP_plus_uconst
:
20800 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20806 stack
[stacki
- 1] -= stack
[stacki
];
20811 /* If we're not the last op, then we definitely can't encode
20812 this using GDB's address_class enum. This is valid for partial
20813 global symbols, although the variable's address will be bogus
20816 dwarf2_complex_location_expr_complaint ();
20819 case DW_OP_GNU_push_tls_address
:
20820 case DW_OP_form_tls_address
:
20821 /* The top of the stack has the offset from the beginning
20822 of the thread control block at which the variable is located. */
20823 /* Nothing should follow this operator, so the top of stack would
20825 /* This is valid for partial global symbols, but the variable's
20826 address will be bogus in the psymtab. Make it always at least
20827 non-zero to not look as a variable garbage collected by linker
20828 which have DW_OP_addr 0. */
20830 dwarf2_complex_location_expr_complaint ();
20834 case DW_OP_GNU_uninit
:
20837 case DW_OP_GNU_addr_index
:
20838 case DW_OP_GNU_const_index
:
20839 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20846 const char *name
= get_DW_OP_name (op
);
20849 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20852 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20856 return (stack
[stacki
]);
20859 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20860 outside of the allocated space. Also enforce minimum>0. */
20861 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20863 complaint (&symfile_complaints
,
20864 _("location description stack overflow"));
20870 complaint (&symfile_complaints
,
20871 _("location description stack underflow"));
20875 return (stack
[stacki
]);
20878 /* memory allocation interface */
20880 static struct dwarf_block
*
20881 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20883 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
20886 static struct die_info
*
20887 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20889 struct die_info
*die
;
20890 size_t size
= sizeof (struct die_info
);
20893 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20895 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20896 memset (die
, 0, sizeof (struct die_info
));
20901 /* Macro support. */
20903 /* Return file name relative to the compilation directory of file number I in
20904 *LH's file name table. The result is allocated using xmalloc; the caller is
20905 responsible for freeing it. */
20908 file_file_name (int file
, struct line_header
*lh
)
20910 /* Is the file number a valid index into the line header's file name
20911 table? Remember that file numbers start with one, not zero. */
20912 if (1 <= file
&& file
<= lh
->num_file_names
)
20914 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20916 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20917 || lh
->include_dirs
== NULL
)
20918 return xstrdup (fe
->name
);
20919 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20920 fe
->name
, (char *) NULL
);
20924 /* The compiler produced a bogus file number. We can at least
20925 record the macro definitions made in the file, even if we
20926 won't be able to find the file by name. */
20927 char fake_name
[80];
20929 xsnprintf (fake_name
, sizeof (fake_name
),
20930 "<bad macro file number %d>", file
);
20932 complaint (&symfile_complaints
,
20933 _("bad file number in macro information (%d)"),
20936 return xstrdup (fake_name
);
20940 /* Return the full name of file number I in *LH's file name table.
20941 Use COMP_DIR as the name of the current directory of the
20942 compilation. The result is allocated using xmalloc; the caller is
20943 responsible for freeing it. */
20945 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20947 /* Is the file number a valid index into the line header's file name
20948 table? Remember that file numbers start with one, not zero. */
20949 if (1 <= file
&& file
<= lh
->num_file_names
)
20951 char *relative
= file_file_name (file
, lh
);
20953 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20955 return reconcat (relative
, comp_dir
, SLASH_STRING
,
20956 relative
, (char *) NULL
);
20959 return file_file_name (file
, lh
);
20963 static struct macro_source_file
*
20964 macro_start_file (int file
, int line
,
20965 struct macro_source_file
*current_file
,
20966 struct line_header
*lh
)
20968 /* File name relative to the compilation directory of this source file. */
20969 char *file_name
= file_file_name (file
, lh
);
20971 if (! current_file
)
20973 /* Note: We don't create a macro table for this compilation unit
20974 at all until we actually get a filename. */
20975 struct macro_table
*macro_table
= get_macro_table ();
20977 /* If we have no current file, then this must be the start_file
20978 directive for the compilation unit's main source file. */
20979 current_file
= macro_set_main (macro_table
, file_name
);
20980 macro_define_special (macro_table
);
20983 current_file
= macro_include (current_file
, line
, file_name
);
20987 return current_file
;
20991 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20992 followed by a null byte. */
20994 copy_string (const char *buf
, int len
)
20996 char *s
= (char *) xmalloc (len
+ 1);
20998 memcpy (s
, buf
, len
);
21004 static const char *
21005 consume_improper_spaces (const char *p
, const char *body
)
21009 complaint (&symfile_complaints
,
21010 _("macro definition contains spaces "
21011 "in formal argument list:\n`%s'"),
21023 parse_macro_definition (struct macro_source_file
*file
, int line
,
21028 /* The body string takes one of two forms. For object-like macro
21029 definitions, it should be:
21031 <macro name> " " <definition>
21033 For function-like macro definitions, it should be:
21035 <macro name> "() " <definition>
21037 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
21039 Spaces may appear only where explicitly indicated, and in the
21042 The Dwarf 2 spec says that an object-like macro's name is always
21043 followed by a space, but versions of GCC around March 2002 omit
21044 the space when the macro's definition is the empty string.
21046 The Dwarf 2 spec says that there should be no spaces between the
21047 formal arguments in a function-like macro's formal argument list,
21048 but versions of GCC around March 2002 include spaces after the
21052 /* Find the extent of the macro name. The macro name is terminated
21053 by either a space or null character (for an object-like macro) or
21054 an opening paren (for a function-like macro). */
21055 for (p
= body
; *p
; p
++)
21056 if (*p
== ' ' || *p
== '(')
21059 if (*p
== ' ' || *p
== '\0')
21061 /* It's an object-like macro. */
21062 int name_len
= p
- body
;
21063 char *name
= copy_string (body
, name_len
);
21064 const char *replacement
;
21067 replacement
= body
+ name_len
+ 1;
21070 dwarf2_macro_malformed_definition_complaint (body
);
21071 replacement
= body
+ name_len
;
21074 macro_define_object (file
, line
, name
, replacement
);
21078 else if (*p
== '(')
21080 /* It's a function-like macro. */
21081 char *name
= copy_string (body
, p
- body
);
21084 char **argv
= XNEWVEC (char *, argv_size
);
21088 p
= consume_improper_spaces (p
, body
);
21090 /* Parse the formal argument list. */
21091 while (*p
&& *p
!= ')')
21093 /* Find the extent of the current argument name. */
21094 const char *arg_start
= p
;
21096 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21099 if (! *p
|| p
== arg_start
)
21100 dwarf2_macro_malformed_definition_complaint (body
);
21103 /* Make sure argv has room for the new argument. */
21104 if (argc
>= argv_size
)
21107 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21110 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21113 p
= consume_improper_spaces (p
, body
);
21115 /* Consume the comma, if present. */
21120 p
= consume_improper_spaces (p
, body
);
21129 /* Perfectly formed definition, no complaints. */
21130 macro_define_function (file
, line
, name
,
21131 argc
, (const char **) argv
,
21133 else if (*p
== '\0')
21135 /* Complain, but do define it. */
21136 dwarf2_macro_malformed_definition_complaint (body
);
21137 macro_define_function (file
, line
, name
,
21138 argc
, (const char **) argv
,
21142 /* Just complain. */
21143 dwarf2_macro_malformed_definition_complaint (body
);
21146 /* Just complain. */
21147 dwarf2_macro_malformed_definition_complaint (body
);
21153 for (i
= 0; i
< argc
; i
++)
21159 dwarf2_macro_malformed_definition_complaint (body
);
21162 /* Skip some bytes from BYTES according to the form given in FORM.
21163 Returns the new pointer. */
21165 static const gdb_byte
*
21166 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21167 enum dwarf_form form
,
21168 unsigned int offset_size
,
21169 struct dwarf2_section_info
*section
)
21171 unsigned int bytes_read
;
21175 case DW_FORM_data1
:
21180 case DW_FORM_data2
:
21184 case DW_FORM_data4
:
21188 case DW_FORM_data8
:
21192 case DW_FORM_string
:
21193 read_direct_string (abfd
, bytes
, &bytes_read
);
21194 bytes
+= bytes_read
;
21197 case DW_FORM_sec_offset
:
21199 case DW_FORM_GNU_strp_alt
:
21200 bytes
+= offset_size
;
21203 case DW_FORM_block
:
21204 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21205 bytes
+= bytes_read
;
21208 case DW_FORM_block1
:
21209 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21211 case DW_FORM_block2
:
21212 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21214 case DW_FORM_block4
:
21215 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21218 case DW_FORM_sdata
:
21219 case DW_FORM_udata
:
21220 case DW_FORM_GNU_addr_index
:
21221 case DW_FORM_GNU_str_index
:
21222 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21225 dwarf2_section_buffer_overflow_complaint (section
);
21233 complaint (&symfile_complaints
,
21234 _("invalid form 0x%x in `%s'"),
21235 form
, get_section_name (section
));
21243 /* A helper for dwarf_decode_macros that handles skipping an unknown
21244 opcode. Returns an updated pointer to the macro data buffer; or,
21245 on error, issues a complaint and returns NULL. */
21247 static const gdb_byte
*
21248 skip_unknown_opcode (unsigned int opcode
,
21249 const gdb_byte
**opcode_definitions
,
21250 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21252 unsigned int offset_size
,
21253 struct dwarf2_section_info
*section
)
21255 unsigned int bytes_read
, i
;
21257 const gdb_byte
*defn
;
21259 if (opcode_definitions
[opcode
] == NULL
)
21261 complaint (&symfile_complaints
,
21262 _("unrecognized DW_MACFINO opcode 0x%x"),
21267 defn
= opcode_definitions
[opcode
];
21268 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21269 defn
+= bytes_read
;
21271 for (i
= 0; i
< arg
; ++i
)
21273 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21274 (enum dwarf_form
) defn
[i
], offset_size
,
21276 if (mac_ptr
== NULL
)
21278 /* skip_form_bytes already issued the complaint. */
21286 /* A helper function which parses the header of a macro section.
21287 If the macro section is the extended (for now called "GNU") type,
21288 then this updates *OFFSET_SIZE. Returns a pointer to just after
21289 the header, or issues a complaint and returns NULL on error. */
21291 static const gdb_byte
*
21292 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21294 const gdb_byte
*mac_ptr
,
21295 unsigned int *offset_size
,
21296 int section_is_gnu
)
21298 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21300 if (section_is_gnu
)
21302 unsigned int version
, flags
;
21304 version
= read_2_bytes (abfd
, mac_ptr
);
21307 complaint (&symfile_complaints
,
21308 _("unrecognized version `%d' in .debug_macro section"),
21314 flags
= read_1_byte (abfd
, mac_ptr
);
21316 *offset_size
= (flags
& 1) ? 8 : 4;
21318 if ((flags
& 2) != 0)
21319 /* We don't need the line table offset. */
21320 mac_ptr
+= *offset_size
;
21322 /* Vendor opcode descriptions. */
21323 if ((flags
& 4) != 0)
21325 unsigned int i
, count
;
21327 count
= read_1_byte (abfd
, mac_ptr
);
21329 for (i
= 0; i
< count
; ++i
)
21331 unsigned int opcode
, bytes_read
;
21334 opcode
= read_1_byte (abfd
, mac_ptr
);
21336 opcode_definitions
[opcode
] = mac_ptr
;
21337 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21338 mac_ptr
+= bytes_read
;
21347 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21348 including DW_MACRO_GNU_transparent_include. */
21351 dwarf_decode_macro_bytes (bfd
*abfd
,
21352 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21353 struct macro_source_file
*current_file
,
21354 struct line_header
*lh
,
21355 struct dwarf2_section_info
*section
,
21356 int section_is_gnu
, int section_is_dwz
,
21357 unsigned int offset_size
,
21358 htab_t include_hash
)
21360 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21361 enum dwarf_macro_record_type macinfo_type
;
21362 int at_commandline
;
21363 const gdb_byte
*opcode_definitions
[256];
21365 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21366 &offset_size
, section_is_gnu
);
21367 if (mac_ptr
== NULL
)
21369 /* We already issued a complaint. */
21373 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21374 GDB is still reading the definitions from command line. First
21375 DW_MACINFO_start_file will need to be ignored as it was already executed
21376 to create CURRENT_FILE for the main source holding also the command line
21377 definitions. On first met DW_MACINFO_start_file this flag is reset to
21378 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21380 at_commandline
= 1;
21384 /* Do we at least have room for a macinfo type byte? */
21385 if (mac_ptr
>= mac_end
)
21387 dwarf2_section_buffer_overflow_complaint (section
);
21391 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21394 /* Note that we rely on the fact that the corresponding GNU and
21395 DWARF constants are the same. */
21396 switch (macinfo_type
)
21398 /* A zero macinfo type indicates the end of the macro
21403 case DW_MACRO_GNU_define
:
21404 case DW_MACRO_GNU_undef
:
21405 case DW_MACRO_GNU_define_indirect
:
21406 case DW_MACRO_GNU_undef_indirect
:
21407 case DW_MACRO_GNU_define_indirect_alt
:
21408 case DW_MACRO_GNU_undef_indirect_alt
:
21410 unsigned int bytes_read
;
21415 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21416 mac_ptr
+= bytes_read
;
21418 if (macinfo_type
== DW_MACRO_GNU_define
21419 || macinfo_type
== DW_MACRO_GNU_undef
)
21421 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21422 mac_ptr
+= bytes_read
;
21426 LONGEST str_offset
;
21428 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21429 mac_ptr
+= offset_size
;
21431 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21432 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21435 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21437 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21440 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21443 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21444 || macinfo_type
== DW_MACRO_GNU_define_indirect
21445 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21446 if (! current_file
)
21448 /* DWARF violation as no main source is present. */
21449 complaint (&symfile_complaints
,
21450 _("debug info with no main source gives macro %s "
21452 is_define
? _("definition") : _("undefinition"),
21456 if ((line
== 0 && !at_commandline
)
21457 || (line
!= 0 && at_commandline
))
21458 complaint (&symfile_complaints
,
21459 _("debug info gives %s macro %s with %s line %d: %s"),
21460 at_commandline
? _("command-line") : _("in-file"),
21461 is_define
? _("definition") : _("undefinition"),
21462 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21465 parse_macro_definition (current_file
, line
, body
);
21468 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21469 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21470 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21471 macro_undef (current_file
, line
, body
);
21476 case DW_MACRO_GNU_start_file
:
21478 unsigned int bytes_read
;
21481 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21482 mac_ptr
+= bytes_read
;
21483 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21484 mac_ptr
+= bytes_read
;
21486 if ((line
== 0 && !at_commandline
)
21487 || (line
!= 0 && at_commandline
))
21488 complaint (&symfile_complaints
,
21489 _("debug info gives source %d included "
21490 "from %s at %s line %d"),
21491 file
, at_commandline
? _("command-line") : _("file"),
21492 line
== 0 ? _("zero") : _("non-zero"), line
);
21494 if (at_commandline
)
21496 /* This DW_MACRO_GNU_start_file was executed in the
21498 at_commandline
= 0;
21501 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21505 case DW_MACRO_GNU_end_file
:
21506 if (! current_file
)
21507 complaint (&symfile_complaints
,
21508 _("macro debug info has an unmatched "
21509 "`close_file' directive"));
21512 current_file
= current_file
->included_by
;
21513 if (! current_file
)
21515 enum dwarf_macro_record_type next_type
;
21517 /* GCC circa March 2002 doesn't produce the zero
21518 type byte marking the end of the compilation
21519 unit. Complain if it's not there, but exit no
21522 /* Do we at least have room for a macinfo type byte? */
21523 if (mac_ptr
>= mac_end
)
21525 dwarf2_section_buffer_overflow_complaint (section
);
21529 /* We don't increment mac_ptr here, so this is just
21532 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21534 if (next_type
!= 0)
21535 complaint (&symfile_complaints
,
21536 _("no terminating 0-type entry for "
21537 "macros in `.debug_macinfo' section"));
21544 case DW_MACRO_GNU_transparent_include
:
21545 case DW_MACRO_GNU_transparent_include_alt
:
21549 bfd
*include_bfd
= abfd
;
21550 struct dwarf2_section_info
*include_section
= section
;
21551 const gdb_byte
*include_mac_end
= mac_end
;
21552 int is_dwz
= section_is_dwz
;
21553 const gdb_byte
*new_mac_ptr
;
21555 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21556 mac_ptr
+= offset_size
;
21558 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21560 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21562 dwarf2_read_section (objfile
, &dwz
->macro
);
21564 include_section
= &dwz
->macro
;
21565 include_bfd
= get_section_bfd_owner (include_section
);
21566 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21570 new_mac_ptr
= include_section
->buffer
+ offset
;
21571 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21575 /* This has actually happened; see
21576 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21577 complaint (&symfile_complaints
,
21578 _("recursive DW_MACRO_GNU_transparent_include in "
21579 ".debug_macro section"));
21583 *slot
= (void *) new_mac_ptr
;
21585 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21586 include_mac_end
, current_file
, lh
,
21587 section
, section_is_gnu
, is_dwz
,
21588 offset_size
, include_hash
);
21590 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21595 case DW_MACINFO_vendor_ext
:
21596 if (!section_is_gnu
)
21598 unsigned int bytes_read
;
21600 /* This reads the constant, but since we don't recognize
21601 any vendor extensions, we ignore it. */
21602 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21603 mac_ptr
+= bytes_read
;
21604 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21605 mac_ptr
+= bytes_read
;
21607 /* We don't recognize any vendor extensions. */
21613 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21614 mac_ptr
, mac_end
, abfd
, offset_size
,
21616 if (mac_ptr
== NULL
)
21620 } while (macinfo_type
!= 0);
21624 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21625 int section_is_gnu
)
21627 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21628 struct line_header
*lh
= cu
->line_header
;
21630 const gdb_byte
*mac_ptr
, *mac_end
;
21631 struct macro_source_file
*current_file
= 0;
21632 enum dwarf_macro_record_type macinfo_type
;
21633 unsigned int offset_size
= cu
->header
.offset_size
;
21634 const gdb_byte
*opcode_definitions
[256];
21635 struct cleanup
*cleanup
;
21636 htab_t include_hash
;
21638 struct dwarf2_section_info
*section
;
21639 const char *section_name
;
21641 if (cu
->dwo_unit
!= NULL
)
21643 if (section_is_gnu
)
21645 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21646 section_name
= ".debug_macro.dwo";
21650 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21651 section_name
= ".debug_macinfo.dwo";
21656 if (section_is_gnu
)
21658 section
= &dwarf2_per_objfile
->macro
;
21659 section_name
= ".debug_macro";
21663 section
= &dwarf2_per_objfile
->macinfo
;
21664 section_name
= ".debug_macinfo";
21668 dwarf2_read_section (objfile
, section
);
21669 if (section
->buffer
== NULL
)
21671 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21674 abfd
= get_section_bfd_owner (section
);
21676 /* First pass: Find the name of the base filename.
21677 This filename is needed in order to process all macros whose definition
21678 (or undefinition) comes from the command line. These macros are defined
21679 before the first DW_MACINFO_start_file entry, and yet still need to be
21680 associated to the base file.
21682 To determine the base file name, we scan the macro definitions until we
21683 reach the first DW_MACINFO_start_file entry. We then initialize
21684 CURRENT_FILE accordingly so that any macro definition found before the
21685 first DW_MACINFO_start_file can still be associated to the base file. */
21687 mac_ptr
= section
->buffer
+ offset
;
21688 mac_end
= section
->buffer
+ section
->size
;
21690 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21691 &offset_size
, section_is_gnu
);
21692 if (mac_ptr
== NULL
)
21694 /* We already issued a complaint. */
21700 /* Do we at least have room for a macinfo type byte? */
21701 if (mac_ptr
>= mac_end
)
21703 /* Complaint is printed during the second pass as GDB will probably
21704 stop the first pass earlier upon finding
21705 DW_MACINFO_start_file. */
21709 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21712 /* Note that we rely on the fact that the corresponding GNU and
21713 DWARF constants are the same. */
21714 switch (macinfo_type
)
21716 /* A zero macinfo type indicates the end of the macro
21721 case DW_MACRO_GNU_define
:
21722 case DW_MACRO_GNU_undef
:
21723 /* Only skip the data by MAC_PTR. */
21725 unsigned int bytes_read
;
21727 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21728 mac_ptr
+= bytes_read
;
21729 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21730 mac_ptr
+= bytes_read
;
21734 case DW_MACRO_GNU_start_file
:
21736 unsigned int bytes_read
;
21739 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21740 mac_ptr
+= bytes_read
;
21741 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21742 mac_ptr
+= bytes_read
;
21744 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21748 case DW_MACRO_GNU_end_file
:
21749 /* No data to skip by MAC_PTR. */
21752 case DW_MACRO_GNU_define_indirect
:
21753 case DW_MACRO_GNU_undef_indirect
:
21754 case DW_MACRO_GNU_define_indirect_alt
:
21755 case DW_MACRO_GNU_undef_indirect_alt
:
21757 unsigned int bytes_read
;
21759 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21760 mac_ptr
+= bytes_read
;
21761 mac_ptr
+= offset_size
;
21765 case DW_MACRO_GNU_transparent_include
:
21766 case DW_MACRO_GNU_transparent_include_alt
:
21767 /* Note that, according to the spec, a transparent include
21768 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21769 skip this opcode. */
21770 mac_ptr
+= offset_size
;
21773 case DW_MACINFO_vendor_ext
:
21774 /* Only skip the data by MAC_PTR. */
21775 if (!section_is_gnu
)
21777 unsigned int bytes_read
;
21779 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21780 mac_ptr
+= bytes_read
;
21781 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21782 mac_ptr
+= bytes_read
;
21787 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21788 mac_ptr
, mac_end
, abfd
, offset_size
,
21790 if (mac_ptr
== NULL
)
21794 } while (macinfo_type
!= 0 && current_file
== NULL
);
21796 /* Second pass: Process all entries.
21798 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21799 command-line macro definitions/undefinitions. This flag is unset when we
21800 reach the first DW_MACINFO_start_file entry. */
21802 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21803 NULL
, xcalloc
, xfree
);
21804 cleanup
= make_cleanup_htab_delete (include_hash
);
21805 mac_ptr
= section
->buffer
+ offset
;
21806 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21807 *slot
= (void *) mac_ptr
;
21808 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21809 current_file
, lh
, section
,
21810 section_is_gnu
, 0, offset_size
, include_hash
);
21811 do_cleanups (cleanup
);
21814 /* Check if the attribute's form is a DW_FORM_block*
21815 if so return true else false. */
21818 attr_form_is_block (const struct attribute
*attr
)
21820 return (attr
== NULL
? 0 :
21821 attr
->form
== DW_FORM_block1
21822 || attr
->form
== DW_FORM_block2
21823 || attr
->form
== DW_FORM_block4
21824 || attr
->form
== DW_FORM_block
21825 || attr
->form
== DW_FORM_exprloc
);
21828 /* Return non-zero if ATTR's value is a section offset --- classes
21829 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21830 You may use DW_UNSND (attr) to retrieve such offsets.
21832 Section 7.5.4, "Attribute Encodings", explains that no attribute
21833 may have a value that belongs to more than one of these classes; it
21834 would be ambiguous if we did, because we use the same forms for all
21838 attr_form_is_section_offset (const struct attribute
*attr
)
21840 return (attr
->form
== DW_FORM_data4
21841 || attr
->form
== DW_FORM_data8
21842 || attr
->form
== DW_FORM_sec_offset
);
21845 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21846 zero otherwise. When this function returns true, you can apply
21847 dwarf2_get_attr_constant_value to it.
21849 However, note that for some attributes you must check
21850 attr_form_is_section_offset before using this test. DW_FORM_data4
21851 and DW_FORM_data8 are members of both the constant class, and of
21852 the classes that contain offsets into other debug sections
21853 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21854 that, if an attribute's can be either a constant or one of the
21855 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21856 taken as section offsets, not constants. */
21859 attr_form_is_constant (const struct attribute
*attr
)
21861 switch (attr
->form
)
21863 case DW_FORM_sdata
:
21864 case DW_FORM_udata
:
21865 case DW_FORM_data1
:
21866 case DW_FORM_data2
:
21867 case DW_FORM_data4
:
21868 case DW_FORM_data8
:
21876 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21877 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21880 attr_form_is_ref (const struct attribute
*attr
)
21882 switch (attr
->form
)
21884 case DW_FORM_ref_addr
:
21889 case DW_FORM_ref_udata
:
21890 case DW_FORM_GNU_ref_alt
:
21897 /* Return the .debug_loc section to use for CU.
21898 For DWO files use .debug_loc.dwo. */
21900 static struct dwarf2_section_info
*
21901 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21904 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21905 return &dwarf2_per_objfile
->loc
;
21908 /* A helper function that fills in a dwarf2_loclist_baton. */
21911 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21912 struct dwarf2_loclist_baton
*baton
,
21913 const struct attribute
*attr
)
21915 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21917 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21919 baton
->per_cu
= cu
->per_cu
;
21920 gdb_assert (baton
->per_cu
);
21921 /* We don't know how long the location list is, but make sure we
21922 don't run off the edge of the section. */
21923 baton
->size
= section
->size
- DW_UNSND (attr
);
21924 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21925 baton
->base_address
= cu
->base_address
;
21926 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21930 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21931 struct dwarf2_cu
*cu
, int is_block
)
21933 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21934 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21936 if (attr_form_is_section_offset (attr
)
21937 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21938 the section. If so, fall through to the complaint in the
21940 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21942 struct dwarf2_loclist_baton
*baton
;
21944 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
21946 fill_in_loclist_baton (cu
, baton
, attr
);
21948 if (cu
->base_known
== 0)
21949 complaint (&symfile_complaints
,
21950 _("Location list used without "
21951 "specifying the CU base address."));
21953 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21954 ? dwarf2_loclist_block_index
21955 : dwarf2_loclist_index
);
21956 SYMBOL_LOCATION_BATON (sym
) = baton
;
21960 struct dwarf2_locexpr_baton
*baton
;
21962 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
21963 baton
->per_cu
= cu
->per_cu
;
21964 gdb_assert (baton
->per_cu
);
21966 if (attr_form_is_block (attr
))
21968 /* Note that we're just copying the block's data pointer
21969 here, not the actual data. We're still pointing into the
21970 info_buffer for SYM's objfile; right now we never release
21971 that buffer, but when we do clean up properly this may
21973 baton
->size
= DW_BLOCK (attr
)->size
;
21974 baton
->data
= DW_BLOCK (attr
)->data
;
21978 dwarf2_invalid_attrib_class_complaint ("location description",
21979 SYMBOL_NATURAL_NAME (sym
));
21983 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21984 ? dwarf2_locexpr_block_index
21985 : dwarf2_locexpr_index
);
21986 SYMBOL_LOCATION_BATON (sym
) = baton
;
21990 /* Return the OBJFILE associated with the compilation unit CU. If CU
21991 came from a separate debuginfo file, then the master objfile is
21995 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21997 struct objfile
*objfile
= per_cu
->objfile
;
21999 /* Return the master objfile, so that we can report and look up the
22000 correct file containing this variable. */
22001 if (objfile
->separate_debug_objfile_backlink
)
22002 objfile
= objfile
->separate_debug_objfile_backlink
;
22007 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
22008 (CU_HEADERP is unused in such case) or prepare a temporary copy at
22009 CU_HEADERP first. */
22011 static const struct comp_unit_head
*
22012 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
22013 struct dwarf2_per_cu_data
*per_cu
)
22015 const gdb_byte
*info_ptr
;
22018 return &per_cu
->cu
->header
;
22020 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
22022 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
22023 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
22028 /* Return the address size given in the compilation unit header for CU. */
22031 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22033 struct comp_unit_head cu_header_local
;
22034 const struct comp_unit_head
*cu_headerp
;
22036 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22038 return cu_headerp
->addr_size
;
22041 /* Return the offset size given in the compilation unit header for CU. */
22044 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
22046 struct comp_unit_head cu_header_local
;
22047 const struct comp_unit_head
*cu_headerp
;
22049 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22051 return cu_headerp
->offset_size
;
22054 /* See its dwarf2loc.h declaration. */
22057 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22059 struct comp_unit_head cu_header_local
;
22060 const struct comp_unit_head
*cu_headerp
;
22062 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22064 if (cu_headerp
->version
== 2)
22065 return cu_headerp
->addr_size
;
22067 return cu_headerp
->offset_size
;
22070 /* Return the text offset of the CU. The returned offset comes from
22071 this CU's objfile. If this objfile came from a separate debuginfo
22072 file, then the offset may be different from the corresponding
22073 offset in the parent objfile. */
22076 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22078 struct objfile
*objfile
= per_cu
->objfile
;
22080 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22083 /* Locate the .debug_info compilation unit from CU's objfile which contains
22084 the DIE at OFFSET. Raises an error on failure. */
22086 static struct dwarf2_per_cu_data
*
22087 dwarf2_find_containing_comp_unit (sect_offset offset
,
22088 unsigned int offset_in_dwz
,
22089 struct objfile
*objfile
)
22091 struct dwarf2_per_cu_data
*this_cu
;
22093 const sect_offset
*cu_off
;
22096 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22099 struct dwarf2_per_cu_data
*mid_cu
;
22100 int mid
= low
+ (high
- low
) / 2;
22102 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22103 cu_off
= &mid_cu
->offset
;
22104 if (mid_cu
->is_dwz
> offset_in_dwz
22105 || (mid_cu
->is_dwz
== offset_in_dwz
22106 && cu_off
->sect_off
>= offset
.sect_off
))
22111 gdb_assert (low
== high
);
22112 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22113 cu_off
= &this_cu
->offset
;
22114 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22116 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22117 error (_("Dwarf Error: could not find partial DIE containing "
22118 "offset 0x%lx [in module %s]"),
22119 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22121 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22122 <= offset
.sect_off
);
22123 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22127 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22128 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22129 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22130 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22131 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22136 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22139 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22141 memset (cu
, 0, sizeof (*cu
));
22143 cu
->per_cu
= per_cu
;
22144 cu
->objfile
= per_cu
->objfile
;
22145 obstack_init (&cu
->comp_unit_obstack
);
22148 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22151 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22152 enum language pretend_language
)
22154 struct attribute
*attr
;
22156 /* Set the language we're debugging. */
22157 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22159 set_cu_language (DW_UNSND (attr
), cu
);
22162 cu
->language
= pretend_language
;
22163 cu
->language_defn
= language_def (cu
->language
);
22166 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22169 /* Release one cached compilation unit, CU. We unlink it from the tree
22170 of compilation units, but we don't remove it from the read_in_chain;
22171 the caller is responsible for that.
22172 NOTE: DATA is a void * because this function is also used as a
22173 cleanup routine. */
22176 free_heap_comp_unit (void *data
)
22178 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22180 gdb_assert (cu
->per_cu
!= NULL
);
22181 cu
->per_cu
->cu
= NULL
;
22184 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22189 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22190 when we're finished with it. We can't free the pointer itself, but be
22191 sure to unlink it from the cache. Also release any associated storage. */
22194 free_stack_comp_unit (void *data
)
22196 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22198 gdb_assert (cu
->per_cu
!= NULL
);
22199 cu
->per_cu
->cu
= NULL
;
22202 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22203 cu
->partial_dies
= NULL
;
22206 /* Free all cached compilation units. */
22209 free_cached_comp_units (void *data
)
22211 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22213 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22214 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22215 while (per_cu
!= NULL
)
22217 struct dwarf2_per_cu_data
*next_cu
;
22219 next_cu
= per_cu
->cu
->read_in_chain
;
22221 free_heap_comp_unit (per_cu
->cu
);
22222 *last_chain
= next_cu
;
22228 /* Increase the age counter on each cached compilation unit, and free
22229 any that are too old. */
22232 age_cached_comp_units (void)
22234 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22236 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22237 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22238 while (per_cu
!= NULL
)
22240 per_cu
->cu
->last_used
++;
22241 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22242 dwarf2_mark (per_cu
->cu
);
22243 per_cu
= per_cu
->cu
->read_in_chain
;
22246 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22247 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22248 while (per_cu
!= NULL
)
22250 struct dwarf2_per_cu_data
*next_cu
;
22252 next_cu
= per_cu
->cu
->read_in_chain
;
22254 if (!per_cu
->cu
->mark
)
22256 free_heap_comp_unit (per_cu
->cu
);
22257 *last_chain
= next_cu
;
22260 last_chain
= &per_cu
->cu
->read_in_chain
;
22266 /* Remove a single compilation unit from the cache. */
22269 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22271 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22273 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22274 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22275 while (per_cu
!= NULL
)
22277 struct dwarf2_per_cu_data
*next_cu
;
22279 next_cu
= per_cu
->cu
->read_in_chain
;
22281 if (per_cu
== target_per_cu
)
22283 free_heap_comp_unit (per_cu
->cu
);
22285 *last_chain
= next_cu
;
22289 last_chain
= &per_cu
->cu
->read_in_chain
;
22295 /* Release all extra memory associated with OBJFILE. */
22298 dwarf2_free_objfile (struct objfile
*objfile
)
22301 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
22302 dwarf2_objfile_data_key
);
22304 if (dwarf2_per_objfile
== NULL
)
22307 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22308 free_cached_comp_units (NULL
);
22310 if (dwarf2_per_objfile
->quick_file_names_table
)
22311 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22313 if (dwarf2_per_objfile
->line_header_hash
)
22314 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22316 /* Everything else should be on the objfile obstack. */
22319 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22320 We store these in a hash table separate from the DIEs, and preserve them
22321 when the DIEs are flushed out of cache.
22323 The CU "per_cu" pointer is needed because offset alone is not enough to
22324 uniquely identify the type. A file may have multiple .debug_types sections,
22325 or the type may come from a DWO file. Furthermore, while it's more logical
22326 to use per_cu->section+offset, with Fission the section with the data is in
22327 the DWO file but we don't know that section at the point we need it.
22328 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22329 because we can enter the lookup routine, get_die_type_at_offset, from
22330 outside this file, and thus won't necessarily have PER_CU->cu.
22331 Fortunately, PER_CU is stable for the life of the objfile. */
22333 struct dwarf2_per_cu_offset_and_type
22335 const struct dwarf2_per_cu_data
*per_cu
;
22336 sect_offset offset
;
22340 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22343 per_cu_offset_and_type_hash (const void *item
)
22345 const struct dwarf2_per_cu_offset_and_type
*ofs
22346 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
22348 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22351 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22354 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22356 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
22357 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
22358 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
22359 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
22361 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22362 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22365 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22366 table if necessary. For convenience, return TYPE.
22368 The DIEs reading must have careful ordering to:
22369 * Not cause infite loops trying to read in DIEs as a prerequisite for
22370 reading current DIE.
22371 * Not trying to dereference contents of still incompletely read in types
22372 while reading in other DIEs.
22373 * Enable referencing still incompletely read in types just by a pointer to
22374 the type without accessing its fields.
22376 Therefore caller should follow these rules:
22377 * Try to fetch any prerequisite types we may need to build this DIE type
22378 before building the type and calling set_die_type.
22379 * After building type call set_die_type for current DIE as soon as
22380 possible before fetching more types to complete the current type.
22381 * Make the type as complete as possible before fetching more types. */
22383 static struct type
*
22384 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22386 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22387 struct objfile
*objfile
= cu
->objfile
;
22388 struct attribute
*attr
;
22389 struct dynamic_prop prop
;
22391 /* For Ada types, make sure that the gnat-specific data is always
22392 initialized (if not already set). There are a few types where
22393 we should not be doing so, because the type-specific area is
22394 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22395 where the type-specific area is used to store the floatformat).
22396 But this is not a problem, because the gnat-specific information
22397 is actually not needed for these types. */
22398 if (need_gnat_info (cu
)
22399 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22400 && TYPE_CODE (type
) != TYPE_CODE_FLT
22401 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22402 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22403 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22404 && !HAVE_GNAT_AUX_INFO (type
))
22405 INIT_GNAT_SPECIFIC (type
);
22407 /* Read DW_AT_allocated and set in type. */
22408 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
22409 if (attr_form_is_block (attr
))
22411 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22412 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
22414 else if (attr
!= NULL
)
22416 complaint (&symfile_complaints
,
22417 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
22418 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22419 die
->offset
.sect_off
);
22422 /* Read DW_AT_associated and set in type. */
22423 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
22424 if (attr_form_is_block (attr
))
22426 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22427 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
22429 else if (attr
!= NULL
)
22431 complaint (&symfile_complaints
,
22432 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
22433 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
22434 die
->offset
.sect_off
);
22437 /* Read DW_AT_data_location and set in type. */
22438 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22439 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22440 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22442 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22444 dwarf2_per_objfile
->die_type_hash
=
22445 htab_create_alloc_ex (127,
22446 per_cu_offset_and_type_hash
,
22447 per_cu_offset_and_type_eq
,
22449 &objfile
->objfile_obstack
,
22450 hashtab_obstack_allocate
,
22451 dummy_obstack_deallocate
);
22454 ofs
.per_cu
= cu
->per_cu
;
22455 ofs
.offset
= die
->offset
;
22457 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22458 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22460 complaint (&symfile_complaints
,
22461 _("A problem internal to GDB: DIE 0x%x has type already set"),
22462 die
->offset
.sect_off
);
22463 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22464 struct dwarf2_per_cu_offset_and_type
);
22469 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22470 or return NULL if the die does not have a saved type. */
22472 static struct type
*
22473 get_die_type_at_offset (sect_offset offset
,
22474 struct dwarf2_per_cu_data
*per_cu
)
22476 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22478 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22481 ofs
.per_cu
= per_cu
;
22482 ofs
.offset
= offset
;
22483 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
22484 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
22491 /* Look up the type for DIE in CU in die_type_hash,
22492 or return NULL if DIE does not have a saved type. */
22494 static struct type
*
22495 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22497 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22500 /* Add a dependence relationship from CU to REF_PER_CU. */
22503 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22504 struct dwarf2_per_cu_data
*ref_per_cu
)
22508 if (cu
->dependencies
== NULL
)
22510 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22511 NULL
, &cu
->comp_unit_obstack
,
22512 hashtab_obstack_allocate
,
22513 dummy_obstack_deallocate
);
22515 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22517 *slot
= ref_per_cu
;
22520 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22521 Set the mark field in every compilation unit in the
22522 cache that we must keep because we are keeping CU. */
22525 dwarf2_mark_helper (void **slot
, void *data
)
22527 struct dwarf2_per_cu_data
*per_cu
;
22529 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22531 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22532 reading of the chain. As such dependencies remain valid it is not much
22533 useful to track and undo them during QUIT cleanups. */
22534 if (per_cu
->cu
== NULL
)
22537 if (per_cu
->cu
->mark
)
22539 per_cu
->cu
->mark
= 1;
22541 if (per_cu
->cu
->dependencies
!= NULL
)
22542 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22547 /* Set the mark field in CU and in every other compilation unit in the
22548 cache that we must keep because we are keeping CU. */
22551 dwarf2_mark (struct dwarf2_cu
*cu
)
22556 if (cu
->dependencies
!= NULL
)
22557 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22561 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22565 per_cu
->cu
->mark
= 0;
22566 per_cu
= per_cu
->cu
->read_in_chain
;
22570 /* Trivial hash function for partial_die_info: the hash value of a DIE
22571 is its offset in .debug_info for this objfile. */
22574 partial_die_hash (const void *item
)
22576 const struct partial_die_info
*part_die
22577 = (const struct partial_die_info
*) item
;
22579 return part_die
->offset
.sect_off
;
22582 /* Trivial comparison function for partial_die_info structures: two DIEs
22583 are equal if they have the same offset. */
22586 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22588 const struct partial_die_info
*part_die_lhs
22589 = (const struct partial_die_info
*) item_lhs
;
22590 const struct partial_die_info
*part_die_rhs
22591 = (const struct partial_die_info
*) item_rhs
;
22593 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22596 static struct cmd_list_element
*set_dwarf_cmdlist
;
22597 static struct cmd_list_element
*show_dwarf_cmdlist
;
22600 set_dwarf_cmd (char *args
, int from_tty
)
22602 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22607 show_dwarf_cmd (char *args
, int from_tty
)
22609 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22612 /* Free data associated with OBJFILE, if necessary. */
22615 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22617 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
22620 /* Make sure we don't accidentally use dwarf2_per_objfile while
22622 dwarf2_per_objfile
= NULL
;
22624 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22625 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22627 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22628 VEC_free (dwarf2_per_cu_ptr
,
22629 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22630 xfree (data
->all_type_units
);
22632 VEC_free (dwarf2_section_info_def
, data
->types
);
22634 if (data
->dwo_files
)
22635 free_dwo_files (data
->dwo_files
, objfile
);
22636 if (data
->dwp_file
)
22637 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22639 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22640 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22644 /* The "save gdb-index" command. */
22646 /* The contents of the hash table we create when building the string
22648 struct strtab_entry
22650 offset_type offset
;
22654 /* Hash function for a strtab_entry.
22656 Function is used only during write_hash_table so no index format backward
22657 compatibility is needed. */
22660 hash_strtab_entry (const void *e
)
22662 const struct strtab_entry
*entry
= (const struct strtab_entry
*) e
;
22663 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22666 /* Equality function for a strtab_entry. */
22669 eq_strtab_entry (const void *a
, const void *b
)
22671 const struct strtab_entry
*ea
= (const struct strtab_entry
*) a
;
22672 const struct strtab_entry
*eb
= (const struct strtab_entry
*) b
;
22673 return !strcmp (ea
->str
, eb
->str
);
22676 /* Create a strtab_entry hash table. */
22679 create_strtab (void)
22681 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22682 xfree
, xcalloc
, xfree
);
22685 /* Add a string to the constant pool. Return the string's offset in
22689 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22692 struct strtab_entry entry
;
22693 struct strtab_entry
*result
;
22696 slot
= htab_find_slot (table
, &entry
, INSERT
);
22698 result
= (struct strtab_entry
*) *slot
;
22701 result
= XNEW (struct strtab_entry
);
22702 result
->offset
= obstack_object_size (cpool
);
22704 obstack_grow_str0 (cpool
, str
);
22707 return result
->offset
;
22710 /* An entry in the symbol table. */
22711 struct symtab_index_entry
22713 /* The name of the symbol. */
22715 /* The offset of the name in the constant pool. */
22716 offset_type index_offset
;
22717 /* A sorted vector of the indices of all the CUs that hold an object
22719 VEC (offset_type
) *cu_indices
;
22722 /* The symbol table. This is a power-of-2-sized hash table. */
22723 struct mapped_symtab
22725 offset_type n_elements
;
22727 struct symtab_index_entry
**data
;
22730 /* Hash function for a symtab_index_entry. */
22733 hash_symtab_entry (const void *e
)
22735 const struct symtab_index_entry
*entry
22736 = (const struct symtab_index_entry
*) e
;
22737 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22738 sizeof (offset_type
) * VEC_length (offset_type
,
22739 entry
->cu_indices
),
22743 /* Equality function for a symtab_index_entry. */
22746 eq_symtab_entry (const void *a
, const void *b
)
22748 const struct symtab_index_entry
*ea
= (const struct symtab_index_entry
*) a
;
22749 const struct symtab_index_entry
*eb
= (const struct symtab_index_entry
*) b
;
22750 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22751 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22753 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22754 VEC_address (offset_type
, eb
->cu_indices
),
22755 sizeof (offset_type
) * len
);
22758 /* Destroy a symtab_index_entry. */
22761 delete_symtab_entry (void *p
)
22763 struct symtab_index_entry
*entry
= (struct symtab_index_entry
*) p
;
22764 VEC_free (offset_type
, entry
->cu_indices
);
22768 /* Create a hash table holding symtab_index_entry objects. */
22771 create_symbol_hash_table (void)
22773 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22774 delete_symtab_entry
, xcalloc
, xfree
);
22777 /* Create a new mapped symtab object. */
22779 static struct mapped_symtab
*
22780 create_mapped_symtab (void)
22782 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22783 symtab
->n_elements
= 0;
22784 symtab
->size
= 1024;
22785 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22789 /* Destroy a mapped_symtab. */
22792 cleanup_mapped_symtab (void *p
)
22794 struct mapped_symtab
*symtab
= (struct mapped_symtab
*) p
;
22795 /* The contents of the array are freed when the other hash table is
22797 xfree (symtab
->data
);
22801 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22804 Function is used only during write_hash_table so no index format backward
22805 compatibility is needed. */
22807 static struct symtab_index_entry
**
22808 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22810 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22812 index
= hash
& (symtab
->size
- 1);
22813 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22817 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22818 return &symtab
->data
[index
];
22819 index
= (index
+ step
) & (symtab
->size
- 1);
22823 /* Expand SYMTAB's hash table. */
22826 hash_expand (struct mapped_symtab
*symtab
)
22828 offset_type old_size
= symtab
->size
;
22830 struct symtab_index_entry
**old_entries
= symtab
->data
;
22833 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22835 for (i
= 0; i
< old_size
; ++i
)
22837 if (old_entries
[i
])
22839 struct symtab_index_entry
**slot
= find_slot (symtab
,
22840 old_entries
[i
]->name
);
22841 *slot
= old_entries
[i
];
22845 xfree (old_entries
);
22848 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22849 CU_INDEX is the index of the CU in which the symbol appears.
22850 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22853 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22854 int is_static
, gdb_index_symbol_kind kind
,
22855 offset_type cu_index
)
22857 struct symtab_index_entry
**slot
;
22858 offset_type cu_index_and_attrs
;
22860 ++symtab
->n_elements
;
22861 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22862 hash_expand (symtab
);
22864 slot
= find_slot (symtab
, name
);
22867 *slot
= XNEW (struct symtab_index_entry
);
22868 (*slot
)->name
= name
;
22869 /* index_offset is set later. */
22870 (*slot
)->cu_indices
= NULL
;
22873 cu_index_and_attrs
= 0;
22874 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22875 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22876 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22878 /* We don't want to record an index value twice as we want to avoid the
22880 We process all global symbols and then all static symbols
22881 (which would allow us to avoid the duplication by only having to check
22882 the last entry pushed), but a symbol could have multiple kinds in one CU.
22883 To keep things simple we don't worry about the duplication here and
22884 sort and uniqufy the list after we've processed all symbols. */
22885 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22888 /* qsort helper routine for uniquify_cu_indices. */
22891 offset_type_compare (const void *ap
, const void *bp
)
22893 offset_type a
= *(offset_type
*) ap
;
22894 offset_type b
= *(offset_type
*) bp
;
22896 return (a
> b
) - (b
> a
);
22899 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22902 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22906 for (i
= 0; i
< symtab
->size
; ++i
)
22908 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22911 && entry
->cu_indices
!= NULL
)
22913 unsigned int next_to_insert
, next_to_check
;
22914 offset_type last_value
;
22916 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22917 VEC_length (offset_type
, entry
->cu_indices
),
22918 sizeof (offset_type
), offset_type_compare
);
22920 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22921 next_to_insert
= 1;
22922 for (next_to_check
= 1;
22923 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22926 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22929 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22931 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22936 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22941 /* Add a vector of indices to the constant pool. */
22944 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22945 struct symtab_index_entry
*entry
)
22949 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22952 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22953 offset_type val
= MAYBE_SWAP (len
);
22958 entry
->index_offset
= obstack_object_size (cpool
);
22960 obstack_grow (cpool
, &val
, sizeof (val
));
22962 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22965 val
= MAYBE_SWAP (iter
);
22966 obstack_grow (cpool
, &val
, sizeof (val
));
22971 struct symtab_index_entry
*old_entry
22972 = (struct symtab_index_entry
*) *slot
;
22973 entry
->index_offset
= old_entry
->index_offset
;
22976 return entry
->index_offset
;
22979 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22980 constant pool entries going into the obstack CPOOL. */
22983 write_hash_table (struct mapped_symtab
*symtab
,
22984 struct obstack
*output
, struct obstack
*cpool
)
22987 htab_t symbol_hash_table
;
22990 symbol_hash_table
= create_symbol_hash_table ();
22991 str_table
= create_strtab ();
22993 /* We add all the index vectors to the constant pool first, to
22994 ensure alignment is ok. */
22995 for (i
= 0; i
< symtab
->size
; ++i
)
22997 if (symtab
->data
[i
])
22998 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
23001 /* Now write out the hash table. */
23002 for (i
= 0; i
< symtab
->size
; ++i
)
23004 offset_type str_off
, vec_off
;
23006 if (symtab
->data
[i
])
23008 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
23009 vec_off
= symtab
->data
[i
]->index_offset
;
23013 /* While 0 is a valid constant pool index, it is not valid
23014 to have 0 for both offsets. */
23019 str_off
= MAYBE_SWAP (str_off
);
23020 vec_off
= MAYBE_SWAP (vec_off
);
23022 obstack_grow (output
, &str_off
, sizeof (str_off
));
23023 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
23026 htab_delete (str_table
);
23027 htab_delete (symbol_hash_table
);
23030 /* Struct to map psymtab to CU index in the index file. */
23031 struct psymtab_cu_index_map
23033 struct partial_symtab
*psymtab
;
23034 unsigned int cu_index
;
23038 hash_psymtab_cu_index (const void *item
)
23040 const struct psymtab_cu_index_map
*map
23041 = (const struct psymtab_cu_index_map
*) item
;
23043 return htab_hash_pointer (map
->psymtab
);
23047 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
23049 const struct psymtab_cu_index_map
*lhs
23050 = (const struct psymtab_cu_index_map
*) item_lhs
;
23051 const struct psymtab_cu_index_map
*rhs
23052 = (const struct psymtab_cu_index_map
*) item_rhs
;
23054 return lhs
->psymtab
== rhs
->psymtab
;
23057 /* Helper struct for building the address table. */
23058 struct addrmap_index_data
23060 struct objfile
*objfile
;
23061 struct obstack
*addr_obstack
;
23062 htab_t cu_index_htab
;
23064 /* Non-zero if the previous_* fields are valid.
23065 We can't write an entry until we see the next entry (since it is only then
23066 that we know the end of the entry). */
23067 int previous_valid
;
23068 /* Index of the CU in the table of all CUs in the index file. */
23069 unsigned int previous_cu_index
;
23070 /* Start address of the CU. */
23071 CORE_ADDR previous_cu_start
;
23074 /* Write an address entry to OBSTACK. */
23077 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
23078 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23080 offset_type cu_index_to_write
;
23082 CORE_ADDR baseaddr
;
23084 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23086 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23087 obstack_grow (obstack
, addr
, 8);
23088 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23089 obstack_grow (obstack
, addr
, 8);
23090 cu_index_to_write
= MAYBE_SWAP (cu_index
);
23091 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
23094 /* Worker function for traversing an addrmap to build the address table. */
23097 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23099 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23100 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23102 if (data
->previous_valid
)
23103 add_address_entry (data
->objfile
, data
->addr_obstack
,
23104 data
->previous_cu_start
, start_addr
,
23105 data
->previous_cu_index
);
23107 data
->previous_cu_start
= start_addr
;
23110 struct psymtab_cu_index_map find_map
, *map
;
23111 find_map
.psymtab
= pst
;
23112 map
= ((struct psymtab_cu_index_map
*)
23113 htab_find (data
->cu_index_htab
, &find_map
));
23114 gdb_assert (map
!= NULL
);
23115 data
->previous_cu_index
= map
->cu_index
;
23116 data
->previous_valid
= 1;
23119 data
->previous_valid
= 0;
23124 /* Write OBJFILE's address map to OBSTACK.
23125 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23126 in the index file. */
23129 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23130 htab_t cu_index_htab
)
23132 struct addrmap_index_data addrmap_index_data
;
23134 /* When writing the address table, we have to cope with the fact that
23135 the addrmap iterator only provides the start of a region; we have to
23136 wait until the next invocation to get the start of the next region. */
23138 addrmap_index_data
.objfile
= objfile
;
23139 addrmap_index_data
.addr_obstack
= obstack
;
23140 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23141 addrmap_index_data
.previous_valid
= 0;
23143 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23144 &addrmap_index_data
);
23146 /* It's highly unlikely the last entry (end address = 0xff...ff)
23147 is valid, but we should still handle it.
23148 The end address is recorded as the start of the next region, but that
23149 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23151 if (addrmap_index_data
.previous_valid
)
23152 add_address_entry (objfile
, obstack
,
23153 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23154 addrmap_index_data
.previous_cu_index
);
23157 /* Return the symbol kind of PSYM. */
23159 static gdb_index_symbol_kind
23160 symbol_kind (struct partial_symbol
*psym
)
23162 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23163 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23171 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23173 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23175 case LOC_CONST_BYTES
:
23176 case LOC_OPTIMIZED_OUT
:
23178 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23180 /* Note: It's currently impossible to recognize psyms as enum values
23181 short of reading the type info. For now punt. */
23182 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23184 /* There are other LOC_FOO values that one might want to classify
23185 as variables, but dwarf2read.c doesn't currently use them. */
23186 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23188 case STRUCT_DOMAIN
:
23189 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23191 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23195 /* Add a list of partial symbols to SYMTAB. */
23198 write_psymbols (struct mapped_symtab
*symtab
,
23200 struct partial_symbol
**psymp
,
23202 offset_type cu_index
,
23205 for (; count
-- > 0; ++psymp
)
23207 struct partial_symbol
*psym
= *psymp
;
23210 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23211 error (_("Ada is not currently supported by the index"));
23213 /* Only add a given psymbol once. */
23214 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23217 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23220 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23221 is_static
, kind
, cu_index
);
23226 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23227 exception if there is an error. */
23230 write_obstack (FILE *file
, struct obstack
*obstack
)
23232 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23234 != obstack_object_size (obstack
))
23235 error (_("couldn't data write to file"));
23238 /* Unlink a file if the argument is not NULL. */
23241 unlink_if_set (void *p
)
23243 char **filename
= (char **) p
;
23245 unlink (*filename
);
23248 /* A helper struct used when iterating over debug_types. */
23249 struct signatured_type_index_data
23251 struct objfile
*objfile
;
23252 struct mapped_symtab
*symtab
;
23253 struct obstack
*types_list
;
23258 /* A helper function that writes a single signatured_type to an
23262 write_one_signatured_type (void **slot
, void *d
)
23264 struct signatured_type_index_data
*info
23265 = (struct signatured_type_index_data
*) d
;
23266 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23267 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23270 write_psymbols (info
->symtab
,
23272 info
->objfile
->global_psymbols
.list
23273 + psymtab
->globals_offset
,
23274 psymtab
->n_global_syms
, info
->cu_index
,
23276 write_psymbols (info
->symtab
,
23278 info
->objfile
->static_psymbols
.list
23279 + psymtab
->statics_offset
,
23280 psymtab
->n_static_syms
, info
->cu_index
,
23283 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23284 entry
->per_cu
.offset
.sect_off
);
23285 obstack_grow (info
->types_list
, val
, 8);
23286 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23287 entry
->type_offset_in_tu
.cu_off
);
23288 obstack_grow (info
->types_list
, val
, 8);
23289 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23290 obstack_grow (info
->types_list
, val
, 8);
23297 /* Recurse into all "included" dependencies and write their symbols as
23298 if they appeared in this psymtab. */
23301 recursively_write_psymbols (struct objfile
*objfile
,
23302 struct partial_symtab
*psymtab
,
23303 struct mapped_symtab
*symtab
,
23305 offset_type cu_index
)
23309 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23310 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23311 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23312 symtab
, psyms_seen
, cu_index
);
23314 write_psymbols (symtab
,
23316 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23317 psymtab
->n_global_syms
, cu_index
,
23319 write_psymbols (symtab
,
23321 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23322 psymtab
->n_static_syms
, cu_index
,
23326 /* Create an index file for OBJFILE in the directory DIR. */
23329 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23331 struct cleanup
*cleanup
;
23332 char *filename
, *cleanup_filename
;
23333 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23334 struct obstack cu_list
, types_cu_list
;
23337 struct mapped_symtab
*symtab
;
23338 offset_type val
, size_of_contents
, total_len
;
23341 htab_t cu_index_htab
;
23342 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23344 if (dwarf2_per_objfile
->using_index
)
23345 error (_("Cannot use an index to create the index"));
23347 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23348 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23350 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23353 if (stat (objfile_name (objfile
), &st
) < 0)
23354 perror_with_name (objfile_name (objfile
));
23356 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23357 INDEX_SUFFIX
, (char *) NULL
);
23358 cleanup
= make_cleanup (xfree
, filename
);
23360 out_file
= gdb_fopen_cloexec (filename
, "wb");
23362 error (_("Can't open `%s' for writing"), filename
);
23364 cleanup_filename
= filename
;
23365 make_cleanup (unlink_if_set
, &cleanup_filename
);
23367 symtab
= create_mapped_symtab ();
23368 make_cleanup (cleanup_mapped_symtab
, symtab
);
23370 obstack_init (&addr_obstack
);
23371 make_cleanup_obstack_free (&addr_obstack
);
23373 obstack_init (&cu_list
);
23374 make_cleanup_obstack_free (&cu_list
);
23376 obstack_init (&types_cu_list
);
23377 make_cleanup_obstack_free (&types_cu_list
);
23379 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23380 NULL
, xcalloc
, xfree
);
23381 make_cleanup_htab_delete (psyms_seen
);
23383 /* While we're scanning CU's create a table that maps a psymtab pointer
23384 (which is what addrmap records) to its index (which is what is recorded
23385 in the index file). This will later be needed to write the address
23387 cu_index_htab
= htab_create_alloc (100,
23388 hash_psymtab_cu_index
,
23389 eq_psymtab_cu_index
,
23390 NULL
, xcalloc
, xfree
);
23391 make_cleanup_htab_delete (cu_index_htab
);
23392 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23393 dwarf2_per_objfile
->n_comp_units
);
23394 make_cleanup (xfree
, psymtab_cu_index_map
);
23396 /* The CU list is already sorted, so we don't need to do additional
23397 work here. Also, the debug_types entries do not appear in
23398 all_comp_units, but only in their own hash table. */
23399 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23401 struct dwarf2_per_cu_data
*per_cu
23402 = dwarf2_per_objfile
->all_comp_units
[i
];
23403 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23405 struct psymtab_cu_index_map
*map
;
23408 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23409 It may be referenced from a local scope but in such case it does not
23410 need to be present in .gdb_index. */
23411 if (psymtab
== NULL
)
23414 if (psymtab
->user
== NULL
)
23415 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23417 map
= &psymtab_cu_index_map
[i
];
23418 map
->psymtab
= psymtab
;
23420 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23421 gdb_assert (slot
!= NULL
);
23422 gdb_assert (*slot
== NULL
);
23425 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23426 per_cu
->offset
.sect_off
);
23427 obstack_grow (&cu_list
, val
, 8);
23428 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23429 obstack_grow (&cu_list
, val
, 8);
23432 /* Dump the address map. */
23433 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23435 /* Write out the .debug_type entries, if any. */
23436 if (dwarf2_per_objfile
->signatured_types
)
23438 struct signatured_type_index_data sig_data
;
23440 sig_data
.objfile
= objfile
;
23441 sig_data
.symtab
= symtab
;
23442 sig_data
.types_list
= &types_cu_list
;
23443 sig_data
.psyms_seen
= psyms_seen
;
23444 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23445 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23446 write_one_signatured_type
, &sig_data
);
23449 /* Now that we've processed all symbols we can shrink their cu_indices
23451 uniquify_cu_indices (symtab
);
23453 obstack_init (&constant_pool
);
23454 make_cleanup_obstack_free (&constant_pool
);
23455 obstack_init (&symtab_obstack
);
23456 make_cleanup_obstack_free (&symtab_obstack
);
23457 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23459 obstack_init (&contents
);
23460 make_cleanup_obstack_free (&contents
);
23461 size_of_contents
= 6 * sizeof (offset_type
);
23462 total_len
= size_of_contents
;
23464 /* The version number. */
23465 val
= MAYBE_SWAP (8);
23466 obstack_grow (&contents
, &val
, sizeof (val
));
23468 /* The offset of the CU list from the start of the file. */
23469 val
= MAYBE_SWAP (total_len
);
23470 obstack_grow (&contents
, &val
, sizeof (val
));
23471 total_len
+= obstack_object_size (&cu_list
);
23473 /* The offset of the types CU list from the start of the file. */
23474 val
= MAYBE_SWAP (total_len
);
23475 obstack_grow (&contents
, &val
, sizeof (val
));
23476 total_len
+= obstack_object_size (&types_cu_list
);
23478 /* The offset of the address table from the start of the file. */
23479 val
= MAYBE_SWAP (total_len
);
23480 obstack_grow (&contents
, &val
, sizeof (val
));
23481 total_len
+= obstack_object_size (&addr_obstack
);
23483 /* The offset of the symbol table from the start of the file. */
23484 val
= MAYBE_SWAP (total_len
);
23485 obstack_grow (&contents
, &val
, sizeof (val
));
23486 total_len
+= obstack_object_size (&symtab_obstack
);
23488 /* The offset of the constant pool from the start of the file. */
23489 val
= MAYBE_SWAP (total_len
);
23490 obstack_grow (&contents
, &val
, sizeof (val
));
23491 total_len
+= obstack_object_size (&constant_pool
);
23493 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23495 write_obstack (out_file
, &contents
);
23496 write_obstack (out_file
, &cu_list
);
23497 write_obstack (out_file
, &types_cu_list
);
23498 write_obstack (out_file
, &addr_obstack
);
23499 write_obstack (out_file
, &symtab_obstack
);
23500 write_obstack (out_file
, &constant_pool
);
23504 /* We want to keep the file, so we set cleanup_filename to NULL
23505 here. See unlink_if_set. */
23506 cleanup_filename
= NULL
;
23508 do_cleanups (cleanup
);
23511 /* Implementation of the `save gdb-index' command.
23513 Note that the file format used by this command is documented in the
23514 GDB manual. Any changes here must be documented there. */
23517 save_gdb_index_command (char *arg
, int from_tty
)
23519 struct objfile
*objfile
;
23522 error (_("usage: save gdb-index DIRECTORY"));
23524 ALL_OBJFILES (objfile
)
23528 /* If the objfile does not correspond to an actual file, skip it. */
23529 if (stat (objfile_name (objfile
), &st
) < 0)
23533 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23534 dwarf2_objfile_data_key
);
23535 if (dwarf2_per_objfile
)
23540 write_psymtabs_to_index (objfile
, arg
);
23542 CATCH (except
, RETURN_MASK_ERROR
)
23544 exception_fprintf (gdb_stderr
, except
,
23545 _("Error while writing index for `%s': "),
23546 objfile_name (objfile
));
23555 int dwarf_always_disassemble
;
23558 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23559 struct cmd_list_element
*c
, const char *value
)
23561 fprintf_filtered (file
,
23562 _("Whether to always disassemble "
23563 "DWARF expressions is %s.\n"),
23568 show_check_physname (struct ui_file
*file
, int from_tty
,
23569 struct cmd_list_element
*c
, const char *value
)
23571 fprintf_filtered (file
,
23572 _("Whether to check \"physname\" is %s.\n"),
23576 void _initialize_dwarf2_read (void);
23579 _initialize_dwarf2_read (void)
23581 struct cmd_list_element
*c
;
23583 dwarf2_objfile_data_key
23584 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23586 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23587 Set DWARF specific variables.\n\
23588 Configure DWARF variables such as the cache size"),
23589 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23590 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23592 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23593 Show DWARF specific variables\n\
23594 Show DWARF variables such as the cache size"),
23595 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23596 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23598 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23599 &dwarf_max_cache_age
, _("\
23600 Set the upper bound on the age of cached DWARF compilation units."), _("\
23601 Show the upper bound on the age of cached DWARF compilation units."), _("\
23602 A higher limit means that cached compilation units will be stored\n\
23603 in memory longer, and more total memory will be used. Zero disables\n\
23604 caching, which can slow down startup."),
23606 show_dwarf_max_cache_age
,
23607 &set_dwarf_cmdlist
,
23608 &show_dwarf_cmdlist
);
23610 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23611 &dwarf_always_disassemble
, _("\
23612 Set whether `info address' always disassembles DWARF expressions."), _("\
23613 Show whether `info address' always disassembles DWARF expressions."), _("\
23614 When enabled, DWARF expressions are always printed in an assembly-like\n\
23615 syntax. When disabled, expressions will be printed in a more\n\
23616 conversational style, when possible."),
23618 show_dwarf_always_disassemble
,
23619 &set_dwarf_cmdlist
,
23620 &show_dwarf_cmdlist
);
23622 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23623 Set debugging of the DWARF reader."), _("\
23624 Show debugging of the DWARF reader."), _("\
23625 When enabled (non-zero), debugging messages are printed during DWARF\n\
23626 reading and symtab expansion. A value of 1 (one) provides basic\n\
23627 information. A value greater than 1 provides more verbose information."),
23630 &setdebuglist
, &showdebuglist
);
23632 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23633 Set debugging of the DWARF DIE reader."), _("\
23634 Show debugging of the DWARF DIE reader."), _("\
23635 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23636 The value is the maximum depth to print."),
23639 &setdebuglist
, &showdebuglist
);
23641 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23642 Set debugging of the dwarf line reader."), _("\
23643 Show debugging of the dwarf line reader."), _("\
23644 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23645 A value of 1 (one) provides basic information.\n\
23646 A value greater than 1 provides more verbose information."),
23649 &setdebuglist
, &showdebuglist
);
23651 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23652 Set cross-checking of \"physname\" code against demangler."), _("\
23653 Show cross-checking of \"physname\" code against demangler."), _("\
23654 When enabled, GDB's internal \"physname\" code is checked against\n\
23656 NULL
, show_check_physname
,
23657 &setdebuglist
, &showdebuglist
);
23659 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23660 no_class
, &use_deprecated_index_sections
, _("\
23661 Set whether to use deprecated gdb_index sections."), _("\
23662 Show whether to use deprecated gdb_index sections."), _("\
23663 When enabled, deprecated .gdb_index sections are used anyway.\n\
23664 Normally they are ignored either because of a missing feature or\n\
23665 performance issue.\n\
23666 Warning: This option must be enabled before gdb reads the file."),
23669 &setlist
, &showlist
);
23671 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23673 Save a gdb-index file.\n\
23674 Usage: save gdb-index DIRECTORY"),
23676 set_cmd_completer (c
, filename_completer
);
23678 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23679 &dwarf2_locexpr_funcs
);
23680 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23681 &dwarf2_loclist_funcs
);
23683 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23684 &dwarf2_block_frame_base_locexpr_funcs
);
23685 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23686 &dwarf2_block_frame_base_loclist_funcs
);