1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2015 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
40 #include "gdb-demangle.h"
41 #include "expression.h"
42 #include "filenames.h" /* for DOSish file names */
45 #include "complaints.h"
47 #include "dwarf2expr.h"
48 #include "dwarf2loc.h"
49 #include "cp-support.h"
55 #include "typeprint.h"
59 #include "completer.h"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
70 #include "filestuff.h"
72 #include "namespace.h"
75 #include <sys/types.h>
77 typedef struct symbol
*symbolp
;
80 /* When == 1, print basic high level tracing messages.
81 When > 1, be more verbose.
82 This is in contrast to the low level DIE reading of dwarf_die_debug. */
83 static unsigned int dwarf_read_debug
= 0;
85 /* When non-zero, dump DIEs after they are read in. */
86 static unsigned int dwarf_die_debug
= 0;
88 /* When non-zero, dump line number entries as they are read in. */
89 static unsigned int dwarf_line_debug
= 0;
91 /* When non-zero, cross-check physname against demangler. */
92 static int check_physname
= 0;
94 /* When non-zero, do not reject deprecated .gdb_index sections. */
95 static int use_deprecated_index_sections
= 0;
97 static const struct objfile_data
*dwarf2_objfile_data_key
;
99 /* The "aclass" indices for various kinds of computed DWARF symbols. */
101 static int dwarf2_locexpr_index
;
102 static int dwarf2_loclist_index
;
103 static int dwarf2_locexpr_block_index
;
104 static int dwarf2_loclist_block_index
;
106 /* A descriptor for dwarf sections.
108 S.ASECTION, SIZE are typically initialized when the objfile is first
109 scanned. BUFFER, READIN are filled in later when the section is read.
110 If the section contained compressed data then SIZE is updated to record
111 the uncompressed size of the section.
113 DWP file format V2 introduces a wrinkle that is easiest to handle by
114 creating the concept of virtual sections contained within a real section.
115 In DWP V2 the sections of the input DWO files are concatenated together
116 into one section, but section offsets are kept relative to the original
118 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
119 the real section this "virtual" section is contained in, and BUFFER,SIZE
120 describe the virtual section. */
122 struct dwarf2_section_info
126 /* If this is a real section, the bfd section. */
128 /* If this is a virtual section, pointer to the containing ("real")
130 struct dwarf2_section_info
*containing_section
;
132 /* Pointer to section data, only valid if readin. */
133 const gdb_byte
*buffer
;
134 /* The size of the section, real or virtual. */
136 /* If this is a virtual section, the offset in the real section.
137 Only valid if is_virtual. */
138 bfd_size_type virtual_offset
;
139 /* True if we have tried to read this section. */
141 /* True if this is a virtual section, False otherwise.
142 This specifies which of s.section and s.containing_section to use. */
146 typedef struct dwarf2_section_info dwarf2_section_info_def
;
147 DEF_VEC_O (dwarf2_section_info_def
);
149 /* All offsets in the index are of this type. It must be
150 architecture-independent. */
151 typedef uint32_t offset_type
;
153 DEF_VEC_I (offset_type
);
155 /* Ensure only legit values are used. */
156 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
158 gdb_assert ((unsigned int) (value) <= 1); \
159 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
162 /* Ensure only legit values are used. */
163 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
165 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
166 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
167 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
170 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
171 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
173 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
174 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
177 /* A description of the mapped index. The file format is described in
178 a comment by the code that writes the index. */
181 /* Index data format version. */
184 /* The total length of the buffer. */
187 /* A pointer to the address table data. */
188 const gdb_byte
*address_table
;
190 /* Size of the address table data in bytes. */
191 offset_type address_table_size
;
193 /* The symbol table, implemented as a hash table. */
194 const offset_type
*symbol_table
;
196 /* Size in slots, each slot is 2 offset_types. */
197 offset_type symbol_table_slots
;
199 /* A pointer to the constant pool. */
200 const char *constant_pool
;
203 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
204 DEF_VEC_P (dwarf2_per_cu_ptr
);
208 int nr_uniq_abbrev_tables
;
210 int nr_symtab_sharers
;
211 int nr_stmt_less_type_units
;
212 int nr_all_type_units_reallocs
;
215 /* Collection of data recorded per objfile.
216 This hangs off of dwarf2_objfile_data_key. */
218 struct dwarf2_per_objfile
220 struct dwarf2_section_info info
;
221 struct dwarf2_section_info abbrev
;
222 struct dwarf2_section_info line
;
223 struct dwarf2_section_info loc
;
224 struct dwarf2_section_info macinfo
;
225 struct dwarf2_section_info macro
;
226 struct dwarf2_section_info str
;
227 struct dwarf2_section_info ranges
;
228 struct dwarf2_section_info addr
;
229 struct dwarf2_section_info frame
;
230 struct dwarf2_section_info eh_frame
;
231 struct dwarf2_section_info gdb_index
;
233 VEC (dwarf2_section_info_def
) *types
;
236 struct objfile
*objfile
;
238 /* Table of all the compilation units. This is used to locate
239 the target compilation unit of a particular reference. */
240 struct dwarf2_per_cu_data
**all_comp_units
;
242 /* The number of compilation units in ALL_COMP_UNITS. */
245 /* The number of .debug_types-related CUs. */
248 /* The number of elements allocated in all_type_units.
249 If there are skeleton-less TUs, we add them to all_type_units lazily. */
250 int n_allocated_type_units
;
252 /* The .debug_types-related CUs (TUs).
253 This is stored in malloc space because we may realloc it. */
254 struct signatured_type
**all_type_units
;
256 /* Table of struct type_unit_group objects.
257 The hash key is the DW_AT_stmt_list value. */
258 htab_t type_unit_groups
;
260 /* A table mapping .debug_types signatures to its signatured_type entry.
261 This is NULL if the .debug_types section hasn't been read in yet. */
262 htab_t signatured_types
;
264 /* Type unit statistics, to see how well the scaling improvements
266 struct tu_stats tu_stats
;
268 /* A chain of compilation units that are currently read in, so that
269 they can be freed later. */
270 struct dwarf2_per_cu_data
*read_in_chain
;
272 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
273 This is NULL if the table hasn't been allocated yet. */
276 /* Non-zero if we've check for whether there is a DWP file. */
279 /* The DWP file if there is one, or NULL. */
280 struct dwp_file
*dwp_file
;
282 /* The shared '.dwz' file, if one exists. This is used when the
283 original data was compressed using 'dwz -m'. */
284 struct dwz_file
*dwz_file
;
286 /* A flag indicating wether this objfile has a section loaded at a
288 int has_section_at_zero
;
290 /* True if we are using the mapped index,
291 or we are faking it for OBJF_READNOW's sake. */
292 unsigned char using_index
;
294 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
295 struct mapped_index
*index_table
;
297 /* When using index_table, this keeps track of all quick_file_names entries.
298 TUs typically share line table entries with a CU, so we maintain a
299 separate table of all line table entries to support the sharing.
300 Note that while there can be way more TUs than CUs, we've already
301 sorted all the TUs into "type unit groups", grouped by their
302 DW_AT_stmt_list value. Therefore the only sharing done here is with a
303 CU and its associated TU group if there is one. */
304 htab_t quick_file_names_table
;
306 /* Set during partial symbol reading, to prevent queueing of full
308 int reading_partial_symbols
;
310 /* Table mapping type DIEs to their struct type *.
311 This is NULL if not allocated yet.
312 The mapping is done via (CU/TU + DIE offset) -> type. */
313 htab_t die_type_hash
;
315 /* The CUs we recently read. */
316 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
318 /* Table containing line_header indexed by offset and offset_in_dwz. */
319 htab_t line_header_hash
;
322 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
324 /* Default names of the debugging sections. */
326 /* Note that if the debugging section has been compressed, it might
327 have a name like .zdebug_info. */
329 static const struct dwarf2_debug_sections dwarf2_elf_names
=
331 { ".debug_info", ".zdebug_info" },
332 { ".debug_abbrev", ".zdebug_abbrev" },
333 { ".debug_line", ".zdebug_line" },
334 { ".debug_loc", ".zdebug_loc" },
335 { ".debug_macinfo", ".zdebug_macinfo" },
336 { ".debug_macro", ".zdebug_macro" },
337 { ".debug_str", ".zdebug_str" },
338 { ".debug_ranges", ".zdebug_ranges" },
339 { ".debug_types", ".zdebug_types" },
340 { ".debug_addr", ".zdebug_addr" },
341 { ".debug_frame", ".zdebug_frame" },
342 { ".eh_frame", NULL
},
343 { ".gdb_index", ".zgdb_index" },
347 /* List of DWO/DWP sections. */
349 static const struct dwop_section_names
351 struct dwarf2_section_names abbrev_dwo
;
352 struct dwarf2_section_names info_dwo
;
353 struct dwarf2_section_names line_dwo
;
354 struct dwarf2_section_names loc_dwo
;
355 struct dwarf2_section_names macinfo_dwo
;
356 struct dwarf2_section_names macro_dwo
;
357 struct dwarf2_section_names str_dwo
;
358 struct dwarf2_section_names str_offsets_dwo
;
359 struct dwarf2_section_names types_dwo
;
360 struct dwarf2_section_names cu_index
;
361 struct dwarf2_section_names tu_index
;
365 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
366 { ".debug_info.dwo", ".zdebug_info.dwo" },
367 { ".debug_line.dwo", ".zdebug_line.dwo" },
368 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
369 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
370 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
371 { ".debug_str.dwo", ".zdebug_str.dwo" },
372 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
373 { ".debug_types.dwo", ".zdebug_types.dwo" },
374 { ".debug_cu_index", ".zdebug_cu_index" },
375 { ".debug_tu_index", ".zdebug_tu_index" },
378 /* local data types */
380 /* The data in a compilation unit header, after target2host
381 translation, looks like this. */
382 struct comp_unit_head
386 unsigned char addr_size
;
387 unsigned char signed_addr_p
;
388 sect_offset abbrev_offset
;
390 /* Size of file offsets; either 4 or 8. */
391 unsigned int offset_size
;
393 /* Size of the length field; either 4 or 12. */
394 unsigned int initial_length_size
;
396 /* Offset to the first byte of this compilation unit header in the
397 .debug_info section, for resolving relative reference dies. */
400 /* Offset to first die in this cu from the start of the cu.
401 This will be the first byte following the compilation unit header. */
402 cu_offset first_die_offset
;
405 /* Type used for delaying computation of method physnames.
406 See comments for compute_delayed_physnames. */
407 struct delayed_method_info
409 /* The type to which the method is attached, i.e., its parent class. */
412 /* The index of the method in the type's function fieldlists. */
415 /* The index of the method in the fieldlist. */
418 /* The name of the DIE. */
421 /* The DIE associated with this method. */
422 struct die_info
*die
;
425 typedef struct delayed_method_info delayed_method_info
;
426 DEF_VEC_O (delayed_method_info
);
428 /* Internal state when decoding a particular compilation unit. */
431 /* The objfile containing this compilation unit. */
432 struct objfile
*objfile
;
434 /* The header of the compilation unit. */
435 struct comp_unit_head header
;
437 /* Base address of this compilation unit. */
438 CORE_ADDR base_address
;
440 /* Non-zero if base_address has been set. */
443 /* The language we are debugging. */
444 enum language language
;
445 const struct language_defn
*language_defn
;
447 const char *producer
;
449 /* The generic symbol table building routines have separate lists for
450 file scope symbols and all all other scopes (local scopes). So
451 we need to select the right one to pass to add_symbol_to_list().
452 We do it by keeping a pointer to the correct list in list_in_scope.
454 FIXME: The original dwarf code just treated the file scope as the
455 first local scope, and all other local scopes as nested local
456 scopes, and worked fine. Check to see if we really need to
457 distinguish these in buildsym.c. */
458 struct pending
**list_in_scope
;
460 /* The abbrev table for this CU.
461 Normally this points to the abbrev table in the objfile.
462 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
463 struct abbrev_table
*abbrev_table
;
465 /* Hash table holding all the loaded partial DIEs
466 with partial_die->offset.SECT_OFF as hash. */
469 /* Storage for things with the same lifetime as this read-in compilation
470 unit, including partial DIEs. */
471 struct obstack comp_unit_obstack
;
473 /* When multiple dwarf2_cu structures are living in memory, this field
474 chains them all together, so that they can be released efficiently.
475 We will probably also want a generation counter so that most-recently-used
476 compilation units are cached... */
477 struct dwarf2_per_cu_data
*read_in_chain
;
479 /* Backlink to our per_cu entry. */
480 struct dwarf2_per_cu_data
*per_cu
;
482 /* How many compilation units ago was this CU last referenced? */
485 /* A hash table of DIE cu_offset for following references with
486 die_info->offset.sect_off as hash. */
489 /* Full DIEs if read in. */
490 struct die_info
*dies
;
492 /* A set of pointers to dwarf2_per_cu_data objects for compilation
493 units referenced by this one. Only set during full symbol processing;
494 partial symbol tables do not have dependencies. */
497 /* Header data from the line table, during full symbol processing. */
498 struct line_header
*line_header
;
500 /* A list of methods which need to have physnames computed
501 after all type information has been read. */
502 VEC (delayed_method_info
) *method_list
;
504 /* To be copied to symtab->call_site_htab. */
505 htab_t call_site_htab
;
507 /* Non-NULL if this CU came from a DWO file.
508 There is an invariant here that is important to remember:
509 Except for attributes copied from the top level DIE in the "main"
510 (or "stub") file in preparation for reading the DWO file
511 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
512 Either there isn't a DWO file (in which case this is NULL and the point
513 is moot), or there is and either we're not going to read it (in which
514 case this is NULL) or there is and we are reading it (in which case this
516 struct dwo_unit
*dwo_unit
;
518 /* The DW_AT_addr_base attribute if present, zero otherwise
519 (zero is a valid value though).
520 Note this value comes from the Fission stub CU/TU's DIE. */
523 /* The DW_AT_ranges_base attribute if present, zero otherwise
524 (zero is a valid value though).
525 Note this value comes from the Fission stub CU/TU's DIE.
526 Also note that the value is zero in the non-DWO case so this value can
527 be used without needing to know whether DWO files are in use or not.
528 N.B. This does not apply to DW_AT_ranges appearing in
529 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
530 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
531 DW_AT_ranges_base *would* have to be applied, and we'd have to care
532 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
533 ULONGEST ranges_base
;
535 /* Mark used when releasing cached dies. */
536 unsigned int mark
: 1;
538 /* This CU references .debug_loc. See the symtab->locations_valid field.
539 This test is imperfect as there may exist optimized debug code not using
540 any location list and still facing inlining issues if handled as
541 unoptimized code. For a future better test see GCC PR other/32998. */
542 unsigned int has_loclist
: 1;
544 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
545 if all the producer_is_* fields are valid. This information is cached
546 because profiling CU expansion showed excessive time spent in
547 producer_is_gxx_lt_4_6. */
548 unsigned int checked_producer
: 1;
549 unsigned int producer_is_gxx_lt_4_6
: 1;
550 unsigned int producer_is_gcc_lt_4_3
: 1;
551 unsigned int producer_is_icc
: 1;
553 /* When set, the file that we're processing is known to have
554 debugging info for C++ namespaces. GCC 3.3.x did not produce
555 this information, but later versions do. */
557 unsigned int processing_has_namespace_info
: 1;
560 /* Persistent data held for a compilation unit, even when not
561 processing it. We put a pointer to this structure in the
562 read_symtab_private field of the psymtab. */
564 struct dwarf2_per_cu_data
566 /* The start offset and length of this compilation unit.
567 NOTE: Unlike comp_unit_head.length, this length includes
569 If the DIE refers to a DWO file, this is always of the original die,
574 /* Flag indicating this compilation unit will be read in before
575 any of the current compilation units are processed. */
576 unsigned int queued
: 1;
578 /* This flag will be set when reading partial DIEs if we need to load
579 absolutely all DIEs for this compilation unit, instead of just the ones
580 we think are interesting. It gets set if we look for a DIE in the
581 hash table and don't find it. */
582 unsigned int load_all_dies
: 1;
584 /* Non-zero if this CU is from .debug_types.
585 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
587 unsigned int is_debug_types
: 1;
589 /* Non-zero if this CU is from the .dwz file. */
590 unsigned int is_dwz
: 1;
592 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
593 This flag is only valid if is_debug_types is true.
594 We can't read a CU directly from a DWO file: There are required
595 attributes in the stub. */
596 unsigned int reading_dwo_directly
: 1;
598 /* Non-zero if the TU has been read.
599 This is used to assist the "Stay in DWO Optimization" for Fission:
600 When reading a DWO, it's faster to read TUs from the DWO instead of
601 fetching them from random other DWOs (due to comdat folding).
602 If the TU has already been read, the optimization is unnecessary
603 (and unwise - we don't want to change where gdb thinks the TU lives
605 This flag is only valid if is_debug_types is true. */
606 unsigned int tu_read
: 1;
608 /* The section this CU/TU lives in.
609 If the DIE refers to a DWO file, this is always the original die,
611 struct dwarf2_section_info
*section
;
613 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
614 of the CU cache it gets reset to NULL again. This is left as NULL for
615 dummy CUs (a CU header, but nothing else). */
616 struct dwarf2_cu
*cu
;
618 /* The corresponding objfile.
619 Normally we can get the objfile from dwarf2_per_objfile.
620 However we can enter this file with just a "per_cu" handle. */
621 struct objfile
*objfile
;
623 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
624 is active. Otherwise, the 'psymtab' field is active. */
627 /* The partial symbol table associated with this compilation unit,
628 or NULL for unread partial units. */
629 struct partial_symtab
*psymtab
;
631 /* Data needed by the "quick" functions. */
632 struct dwarf2_per_cu_quick_data
*quick
;
635 /* The CUs we import using DW_TAG_imported_unit. This is filled in
636 while reading psymtabs, used to compute the psymtab dependencies,
637 and then cleared. Then it is filled in again while reading full
638 symbols, and only deleted when the objfile is destroyed.
640 This is also used to work around a difference between the way gold
641 generates .gdb_index version <=7 and the way gdb does. Arguably this
642 is a gold bug. For symbols coming from TUs, gold records in the index
643 the CU that includes the TU instead of the TU itself. This breaks
644 dw2_lookup_symbol: It assumes that if the index says symbol X lives
645 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
646 will find X. Alas TUs live in their own symtab, so after expanding CU Y
647 we need to look in TU Z to find X. Fortunately, this is akin to
648 DW_TAG_imported_unit, so we just use the same mechanism: For
649 .gdb_index version <=7 this also records the TUs that the CU referred
650 to. Concurrently with this change gdb was modified to emit version 8
651 indices so we only pay a price for gold generated indices.
652 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
653 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
656 /* Entry in the signatured_types hash table. */
658 struct signatured_type
660 /* The "per_cu" object of this type.
661 This struct is used iff per_cu.is_debug_types.
662 N.B.: This is the first member so that it's easy to convert pointers
664 struct dwarf2_per_cu_data per_cu
;
666 /* The type's signature. */
669 /* Offset in the TU of the type's DIE, as read from the TU header.
670 If this TU is a DWO stub and the definition lives in a DWO file
671 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
672 cu_offset type_offset_in_tu
;
674 /* Offset in the section of the type's DIE.
675 If the definition lives in a DWO file, this is the offset in the
676 .debug_types.dwo section.
677 The value is zero until the actual value is known.
678 Zero is otherwise not a valid section offset. */
679 sect_offset type_offset_in_section
;
681 /* Type units are grouped by their DW_AT_stmt_list entry so that they
682 can share them. This points to the containing symtab. */
683 struct type_unit_group
*type_unit_group
;
686 The first time we encounter this type we fully read it in and install it
687 in the symbol tables. Subsequent times we only need the type. */
690 /* Containing DWO unit.
691 This field is valid iff per_cu.reading_dwo_directly. */
692 struct dwo_unit
*dwo_unit
;
695 typedef struct signatured_type
*sig_type_ptr
;
696 DEF_VEC_P (sig_type_ptr
);
698 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
699 This includes type_unit_group and quick_file_names. */
701 struct stmt_list_hash
703 /* The DWO unit this table is from or NULL if there is none. */
704 struct dwo_unit
*dwo_unit
;
706 /* Offset in .debug_line or .debug_line.dwo. */
707 sect_offset line_offset
;
710 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
711 an object of this type. */
713 struct type_unit_group
715 /* dwarf2read.c's main "handle" on a TU symtab.
716 To simplify things we create an artificial CU that "includes" all the
717 type units using this stmt_list so that the rest of the code still has
718 a "per_cu" handle on the symtab.
719 This PER_CU is recognized by having no section. */
720 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
721 struct dwarf2_per_cu_data per_cu
;
723 /* The TUs that share this DW_AT_stmt_list entry.
724 This is added to while parsing type units to build partial symtabs,
725 and is deleted afterwards and not used again. */
726 VEC (sig_type_ptr
) *tus
;
728 /* The compunit symtab.
729 Type units in a group needn't all be defined in the same source file,
730 so we create an essentially anonymous symtab as the compunit symtab. */
731 struct compunit_symtab
*compunit_symtab
;
733 /* The data used to construct the hash key. */
734 struct stmt_list_hash hash
;
736 /* The number of symtabs from the line header.
737 The value here must match line_header.num_file_names. */
738 unsigned int num_symtabs
;
740 /* The symbol tables for this TU (obtained from the files listed in
742 WARNING: The order of entries here must match the order of entries
743 in the line header. After the first TU using this type_unit_group, the
744 line header for the subsequent TUs is recreated from this. This is done
745 because we need to use the same symtabs for each TU using the same
746 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
747 there's no guarantee the line header doesn't have duplicate entries. */
748 struct symtab
**symtabs
;
751 /* These sections are what may appear in a (real or virtual) DWO file. */
755 struct dwarf2_section_info abbrev
;
756 struct dwarf2_section_info line
;
757 struct dwarf2_section_info loc
;
758 struct dwarf2_section_info macinfo
;
759 struct dwarf2_section_info macro
;
760 struct dwarf2_section_info str
;
761 struct dwarf2_section_info str_offsets
;
762 /* In the case of a virtual DWO file, these two are unused. */
763 struct dwarf2_section_info info
;
764 VEC (dwarf2_section_info_def
) *types
;
767 /* CUs/TUs in DWP/DWO files. */
771 /* Backlink to the containing struct dwo_file. */
772 struct dwo_file
*dwo_file
;
774 /* The "id" that distinguishes this CU/TU.
775 .debug_info calls this "dwo_id", .debug_types calls this "signature".
776 Since signatures came first, we stick with it for consistency. */
779 /* The section this CU/TU lives in, in the DWO file. */
780 struct dwarf2_section_info
*section
;
782 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
786 /* For types, offset in the type's DIE of the type defined by this TU. */
787 cu_offset type_offset_in_tu
;
790 /* include/dwarf2.h defines the DWP section codes.
791 It defines a max value but it doesn't define a min value, which we
792 use for error checking, so provide one. */
794 enum dwp_v2_section_ids
799 /* Data for one DWO file.
801 This includes virtual DWO files (a virtual DWO file is a DWO file as it
802 appears in a DWP file). DWP files don't really have DWO files per se -
803 comdat folding of types "loses" the DWO file they came from, and from
804 a high level view DWP files appear to contain a mass of random types.
805 However, to maintain consistency with the non-DWP case we pretend DWP
806 files contain virtual DWO files, and we assign each TU with one virtual
807 DWO file (generally based on the line and abbrev section offsets -
808 a heuristic that seems to work in practice). */
812 /* The DW_AT_GNU_dwo_name attribute.
813 For virtual DWO files the name is constructed from the section offsets
814 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
815 from related CU+TUs. */
816 const char *dwo_name
;
818 /* The DW_AT_comp_dir attribute. */
819 const char *comp_dir
;
821 /* The bfd, when the file is open. Otherwise this is NULL.
822 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
825 /* The sections that make up this DWO file.
826 Remember that for virtual DWO files in DWP V2, these are virtual
827 sections (for lack of a better name). */
828 struct dwo_sections sections
;
830 /* The CU in the file.
831 We only support one because having more than one requires hacking the
832 dwo_name of each to match, which is highly unlikely to happen.
833 Doing this means all TUs can share comp_dir: We also assume that
834 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
837 /* Table of TUs in the file.
838 Each element is a struct dwo_unit. */
842 /* These sections are what may appear in a DWP file. */
846 /* These are used by both DWP version 1 and 2. */
847 struct dwarf2_section_info str
;
848 struct dwarf2_section_info cu_index
;
849 struct dwarf2_section_info tu_index
;
851 /* These are only used by DWP version 2 files.
852 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
853 sections are referenced by section number, and are not recorded here.
854 In DWP version 2 there is at most one copy of all these sections, each
855 section being (effectively) comprised of the concatenation of all of the
856 individual sections that exist in the version 1 format.
857 To keep the code simple we treat each of these concatenated pieces as a
858 section itself (a virtual section?). */
859 struct dwarf2_section_info abbrev
;
860 struct dwarf2_section_info info
;
861 struct dwarf2_section_info line
;
862 struct dwarf2_section_info loc
;
863 struct dwarf2_section_info macinfo
;
864 struct dwarf2_section_info macro
;
865 struct dwarf2_section_info str_offsets
;
866 struct dwarf2_section_info types
;
869 /* These sections are what may appear in a virtual DWO file in DWP version 1.
870 A virtual DWO file is a DWO file as it appears in a DWP file. */
872 struct virtual_v1_dwo_sections
874 struct dwarf2_section_info abbrev
;
875 struct dwarf2_section_info line
;
876 struct dwarf2_section_info loc
;
877 struct dwarf2_section_info macinfo
;
878 struct dwarf2_section_info macro
;
879 struct dwarf2_section_info str_offsets
;
880 /* Each DWP hash table entry records one CU or one TU.
881 That is recorded here, and copied to dwo_unit.section. */
882 struct dwarf2_section_info info_or_types
;
885 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
886 In version 2, the sections of the DWO files are concatenated together
887 and stored in one section of that name. Thus each ELF section contains
888 several "virtual" sections. */
890 struct virtual_v2_dwo_sections
892 bfd_size_type abbrev_offset
;
893 bfd_size_type abbrev_size
;
895 bfd_size_type line_offset
;
896 bfd_size_type line_size
;
898 bfd_size_type loc_offset
;
899 bfd_size_type loc_size
;
901 bfd_size_type macinfo_offset
;
902 bfd_size_type macinfo_size
;
904 bfd_size_type macro_offset
;
905 bfd_size_type macro_size
;
907 bfd_size_type str_offsets_offset
;
908 bfd_size_type str_offsets_size
;
910 /* Each DWP hash table entry records one CU or one TU.
911 That is recorded here, and copied to dwo_unit.section. */
912 bfd_size_type info_or_types_offset
;
913 bfd_size_type info_or_types_size
;
916 /* Contents of DWP hash tables. */
918 struct dwp_hash_table
920 uint32_t version
, nr_columns
;
921 uint32_t nr_units
, nr_slots
;
922 const gdb_byte
*hash_table
, *unit_table
;
927 const gdb_byte
*indices
;
931 /* This is indexed by column number and gives the id of the section
933 #define MAX_NR_V2_DWO_SECTIONS \
934 (1 /* .debug_info or .debug_types */ \
935 + 1 /* .debug_abbrev */ \
936 + 1 /* .debug_line */ \
937 + 1 /* .debug_loc */ \
938 + 1 /* .debug_str_offsets */ \
939 + 1 /* .debug_macro or .debug_macinfo */)
940 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
941 const gdb_byte
*offsets
;
942 const gdb_byte
*sizes
;
947 /* Data for one DWP file. */
951 /* Name of the file. */
954 /* File format version. */
960 /* Section info for this file. */
961 struct dwp_sections sections
;
963 /* Table of CUs in the file. */
964 const struct dwp_hash_table
*cus
;
966 /* Table of TUs in the file. */
967 const struct dwp_hash_table
*tus
;
969 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
973 /* Table to map ELF section numbers to their sections.
974 This is only needed for the DWP V1 file format. */
975 unsigned int num_sections
;
976 asection
**elf_sections
;
979 /* This represents a '.dwz' file. */
983 /* A dwz file can only contain a few sections. */
984 struct dwarf2_section_info abbrev
;
985 struct dwarf2_section_info info
;
986 struct dwarf2_section_info str
;
987 struct dwarf2_section_info line
;
988 struct dwarf2_section_info macro
;
989 struct dwarf2_section_info gdb_index
;
995 /* Struct used to pass misc. parameters to read_die_and_children, et
996 al. which are used for both .debug_info and .debug_types dies.
997 All parameters here are unchanging for the life of the call. This
998 struct exists to abstract away the constant parameters of die reading. */
1000 struct die_reader_specs
1002 /* The bfd of die_section. */
1005 /* The CU of the DIE we are parsing. */
1006 struct dwarf2_cu
*cu
;
1008 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1009 struct dwo_file
*dwo_file
;
1011 /* The section the die comes from.
1012 This is either .debug_info or .debug_types, or the .dwo variants. */
1013 struct dwarf2_section_info
*die_section
;
1015 /* die_section->buffer. */
1016 const gdb_byte
*buffer
;
1018 /* The end of the buffer. */
1019 const gdb_byte
*buffer_end
;
1021 /* The value of the DW_AT_comp_dir attribute. */
1022 const char *comp_dir
;
1025 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1026 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1027 const gdb_byte
*info_ptr
,
1028 struct die_info
*comp_unit_die
,
1035 unsigned int dir_index
;
1036 unsigned int mod_time
;
1037 unsigned int length
;
1038 /* Non-zero if referenced by the Line Number Program. */
1040 /* The associated symbol table, if any. */
1041 struct symtab
*symtab
;
1044 /* The line number information for a compilation unit (found in the
1045 .debug_line section) begins with a "statement program header",
1046 which contains the following information. */
1049 /* Offset of line number information in .debug_line section. */
1052 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1053 unsigned offset_in_dwz
: 1;
1055 unsigned int total_length
;
1056 unsigned short version
;
1057 unsigned int header_length
;
1058 unsigned char minimum_instruction_length
;
1059 unsigned char maximum_ops_per_instruction
;
1060 unsigned char default_is_stmt
;
1062 unsigned char line_range
;
1063 unsigned char opcode_base
;
1065 /* standard_opcode_lengths[i] is the number of operands for the
1066 standard opcode whose value is i. This means that
1067 standard_opcode_lengths[0] is unused, and the last meaningful
1068 element is standard_opcode_lengths[opcode_base - 1]. */
1069 unsigned char *standard_opcode_lengths
;
1071 /* The include_directories table. NOTE! These strings are not
1072 allocated with xmalloc; instead, they are pointers into
1073 debug_line_buffer. If you try to free them, `free' will get
1075 unsigned int num_include_dirs
, include_dirs_size
;
1076 const char **include_dirs
;
1078 /* The file_names table. NOTE! These strings are not allocated
1079 with xmalloc; instead, they are pointers into debug_line_buffer.
1080 Don't try to free them directly. */
1081 unsigned int num_file_names
, file_names_size
;
1082 struct file_entry
*file_names
;
1084 /* The start and end of the statement program following this
1085 header. These point into dwarf2_per_objfile->line_buffer. */
1086 const gdb_byte
*statement_program_start
, *statement_program_end
;
1089 /* When we construct a partial symbol table entry we only
1090 need this much information. */
1091 struct partial_die_info
1093 /* Offset of this DIE. */
1096 /* DWARF-2 tag for this DIE. */
1097 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1099 /* Assorted flags describing the data found in this DIE. */
1100 unsigned int has_children
: 1;
1101 unsigned int is_external
: 1;
1102 unsigned int is_declaration
: 1;
1103 unsigned int has_type
: 1;
1104 unsigned int has_specification
: 1;
1105 unsigned int has_pc_info
: 1;
1106 unsigned int may_be_inlined
: 1;
1108 /* Flag set if the SCOPE field of this structure has been
1110 unsigned int scope_set
: 1;
1112 /* Flag set if the DIE has a byte_size attribute. */
1113 unsigned int has_byte_size
: 1;
1115 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1116 unsigned int has_const_value
: 1;
1118 /* Flag set if any of the DIE's children are template arguments. */
1119 unsigned int has_template_arguments
: 1;
1121 /* Flag set if fixup_partial_die has been called on this die. */
1122 unsigned int fixup_called
: 1;
1124 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1125 unsigned int is_dwz
: 1;
1127 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1128 unsigned int spec_is_dwz
: 1;
1130 /* The name of this DIE. Normally the value of DW_AT_name, but
1131 sometimes a default name for unnamed DIEs. */
1134 /* The linkage name, if present. */
1135 const char *linkage_name
;
1137 /* The scope to prepend to our children. This is generally
1138 allocated on the comp_unit_obstack, so will disappear
1139 when this compilation unit leaves the cache. */
1142 /* Some data associated with the partial DIE. The tag determines
1143 which field is live. */
1146 /* The location description associated with this DIE, if any. */
1147 struct dwarf_block
*locdesc
;
1148 /* The offset of an import, for DW_TAG_imported_unit. */
1152 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1156 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1157 DW_AT_sibling, if any. */
1158 /* NOTE: This member isn't strictly necessary, read_partial_die could
1159 return DW_AT_sibling values to its caller load_partial_dies. */
1160 const gdb_byte
*sibling
;
1162 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1163 DW_AT_specification (or DW_AT_abstract_origin or
1164 DW_AT_extension). */
1165 sect_offset spec_offset
;
1167 /* Pointers to this DIE's parent, first child, and next sibling,
1169 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1172 /* This data structure holds the information of an abbrev. */
1175 unsigned int number
; /* number identifying abbrev */
1176 enum dwarf_tag tag
; /* dwarf tag */
1177 unsigned short has_children
; /* boolean */
1178 unsigned short num_attrs
; /* number of attributes */
1179 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1180 struct abbrev_info
*next
; /* next in chain */
1185 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1186 ENUM_BITFIELD(dwarf_form
) form
: 16;
1189 /* Size of abbrev_table.abbrev_hash_table. */
1190 #define ABBREV_HASH_SIZE 121
1192 /* Top level data structure to contain an abbreviation table. */
1196 /* Where the abbrev table came from.
1197 This is used as a sanity check when the table is used. */
1200 /* Storage for the abbrev table. */
1201 struct obstack abbrev_obstack
;
1203 /* Hash table of abbrevs.
1204 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1205 It could be statically allocated, but the previous code didn't so we
1207 struct abbrev_info
**abbrevs
;
1210 /* Attributes have a name and a value. */
1213 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1214 ENUM_BITFIELD(dwarf_form
) form
: 15;
1216 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1217 field should be in u.str (existing only for DW_STRING) but it is kept
1218 here for better struct attribute alignment. */
1219 unsigned int string_is_canonical
: 1;
1224 struct dwarf_block
*blk
;
1233 /* This data structure holds a complete die structure. */
1236 /* DWARF-2 tag for this DIE. */
1237 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1239 /* Number of attributes */
1240 unsigned char num_attrs
;
1242 /* True if we're presently building the full type name for the
1243 type derived from this DIE. */
1244 unsigned char building_fullname
: 1;
1246 /* True if this die is in process. PR 16581. */
1247 unsigned char in_process
: 1;
1250 unsigned int abbrev
;
1252 /* Offset in .debug_info or .debug_types section. */
1255 /* The dies in a compilation unit form an n-ary tree. PARENT
1256 points to this die's parent; CHILD points to the first child of
1257 this node; and all the children of a given node are chained
1258 together via their SIBLING fields. */
1259 struct die_info
*child
; /* Its first child, if any. */
1260 struct die_info
*sibling
; /* Its next sibling, if any. */
1261 struct die_info
*parent
; /* Its parent, if any. */
1263 /* An array of attributes, with NUM_ATTRS elements. There may be
1264 zero, but it's not common and zero-sized arrays are not
1265 sufficiently portable C. */
1266 struct attribute attrs
[1];
1269 /* Get at parts of an attribute structure. */
1271 #define DW_STRING(attr) ((attr)->u.str)
1272 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1273 #define DW_UNSND(attr) ((attr)->u.unsnd)
1274 #define DW_BLOCK(attr) ((attr)->u.blk)
1275 #define DW_SND(attr) ((attr)->u.snd)
1276 #define DW_ADDR(attr) ((attr)->u.addr)
1277 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1279 /* Blocks are a bunch of untyped bytes. */
1284 /* Valid only if SIZE is not zero. */
1285 const gdb_byte
*data
;
1288 #ifndef ATTR_ALLOC_CHUNK
1289 #define ATTR_ALLOC_CHUNK 4
1292 /* Allocate fields for structs, unions and enums in this size. */
1293 #ifndef DW_FIELD_ALLOC_CHUNK
1294 #define DW_FIELD_ALLOC_CHUNK 4
1297 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1298 but this would require a corresponding change in unpack_field_as_long
1300 static int bits_per_byte
= 8;
1304 struct nextfield
*next
;
1312 struct nextfnfield
*next
;
1313 struct fn_field fnfield
;
1320 struct nextfnfield
*head
;
1323 struct typedef_field_list
1325 struct typedef_field field
;
1326 struct typedef_field_list
*next
;
1329 /* The routines that read and process dies for a C struct or C++ class
1330 pass lists of data member fields and lists of member function fields
1331 in an instance of a field_info structure, as defined below. */
1334 /* List of data member and baseclasses fields. */
1335 struct nextfield
*fields
, *baseclasses
;
1337 /* Number of fields (including baseclasses). */
1340 /* Number of baseclasses. */
1343 /* Set if the accesibility of one of the fields is not public. */
1344 int non_public_fields
;
1346 /* Member function fields array, entries are allocated in the order they
1347 are encountered in the object file. */
1348 struct nextfnfield
*fnfields
;
1350 /* Member function fieldlist array, contains name of possibly overloaded
1351 member function, number of overloaded member functions and a pointer
1352 to the head of the member function field chain. */
1353 struct fnfieldlist
*fnfieldlists
;
1355 /* Number of entries in the fnfieldlists array. */
1358 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1359 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1360 struct typedef_field_list
*typedef_field_list
;
1361 unsigned typedef_field_list_count
;
1364 /* One item on the queue of compilation units to read in full symbols
1366 struct dwarf2_queue_item
1368 struct dwarf2_per_cu_data
*per_cu
;
1369 enum language pretend_language
;
1370 struct dwarf2_queue_item
*next
;
1373 /* The current queue. */
1374 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1376 /* Loaded secondary compilation units are kept in memory until they
1377 have not been referenced for the processing of this many
1378 compilation units. Set this to zero to disable caching. Cache
1379 sizes of up to at least twenty will improve startup time for
1380 typical inter-CU-reference binaries, at an obvious memory cost. */
1381 static int dwarf_max_cache_age
= 5;
1383 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1384 struct cmd_list_element
*c
, const char *value
)
1386 fprintf_filtered (file
, _("The upper bound on the age of cached "
1387 "DWARF compilation units is %s.\n"),
1391 /* local function prototypes */
1393 static const char *get_section_name (const struct dwarf2_section_info
*);
1395 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1397 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1399 static void dwarf2_find_base_address (struct die_info
*die
,
1400 struct dwarf2_cu
*cu
);
1402 static struct partial_symtab
*create_partial_symtab
1403 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1405 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1407 static void scan_partial_symbols (struct partial_die_info
*,
1408 CORE_ADDR
*, CORE_ADDR
*,
1409 int, struct dwarf2_cu
*);
1411 static void add_partial_symbol (struct partial_die_info
*,
1412 struct dwarf2_cu
*);
1414 static void add_partial_namespace (struct partial_die_info
*pdi
,
1415 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1416 int set_addrmap
, struct dwarf2_cu
*cu
);
1418 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1419 CORE_ADDR
*highpc
, int set_addrmap
,
1420 struct dwarf2_cu
*cu
);
1422 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1423 struct dwarf2_cu
*cu
);
1425 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1426 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1427 int need_pc
, struct dwarf2_cu
*cu
);
1429 static void dwarf2_read_symtab (struct partial_symtab
*,
1432 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1434 static struct abbrev_info
*abbrev_table_lookup_abbrev
1435 (const struct abbrev_table
*, unsigned int);
1437 static struct abbrev_table
*abbrev_table_read_table
1438 (struct dwarf2_section_info
*, sect_offset
);
1440 static void abbrev_table_free (struct abbrev_table
*);
1442 static void abbrev_table_free_cleanup (void *);
1444 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1445 struct dwarf2_section_info
*);
1447 static void dwarf2_free_abbrev_table (void *);
1449 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1451 static struct partial_die_info
*load_partial_dies
1452 (const struct die_reader_specs
*, const gdb_byte
*, int);
1454 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1455 struct partial_die_info
*,
1456 struct abbrev_info
*,
1460 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1461 struct dwarf2_cu
*);
1463 static void fixup_partial_die (struct partial_die_info
*,
1464 struct dwarf2_cu
*);
1466 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1467 struct attribute
*, struct attr_abbrev
*,
1470 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1472 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1474 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1476 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1478 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1480 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1483 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1485 static LONGEST read_checked_initial_length_and_offset
1486 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1487 unsigned int *, unsigned int *);
1489 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1490 const struct comp_unit_head
*,
1493 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1495 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1498 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1500 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1502 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1503 const struct comp_unit_head
*,
1506 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1508 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1510 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1512 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1516 static const char *read_str_index (const struct die_reader_specs
*reader
,
1517 ULONGEST str_index
);
1519 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1521 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1522 struct dwarf2_cu
*);
1524 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1527 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1528 struct dwarf2_cu
*cu
);
1530 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1531 struct dwarf2_cu
*cu
);
1533 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1535 static struct die_info
*die_specification (struct die_info
*die
,
1536 struct dwarf2_cu
**);
1538 static void free_line_header (struct line_header
*lh
);
1540 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1541 struct dwarf2_cu
*cu
);
1543 static void dwarf_decode_lines (struct line_header
*, const char *,
1544 struct dwarf2_cu
*, struct partial_symtab
*,
1545 CORE_ADDR
, int decode_mapping
);
1547 static void dwarf2_start_subfile (const char *, const char *);
1549 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1550 const char *, const char *,
1553 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1554 struct dwarf2_cu
*);
1556 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1557 struct dwarf2_cu
*, struct symbol
*);
1559 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1560 struct dwarf2_cu
*);
1562 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1565 struct obstack
*obstack
,
1566 struct dwarf2_cu
*cu
, LONGEST
*value
,
1567 const gdb_byte
**bytes
,
1568 struct dwarf2_locexpr_baton
**baton
);
1570 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1572 static int need_gnat_info (struct dwarf2_cu
*);
1574 static struct type
*die_descriptive_type (struct die_info
*,
1575 struct dwarf2_cu
*);
1577 static void set_descriptive_type (struct type
*, struct die_info
*,
1578 struct dwarf2_cu
*);
1580 static struct type
*die_containing_type (struct die_info
*,
1581 struct dwarf2_cu
*);
1583 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1584 struct dwarf2_cu
*);
1586 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1588 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1590 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1592 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1593 const char *suffix
, int physname
,
1594 struct dwarf2_cu
*cu
);
1596 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1598 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1600 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1602 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1604 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1606 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1607 struct dwarf2_cu
*, struct partial_symtab
*);
1609 static int dwarf2_get_pc_bounds (struct die_info
*,
1610 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1611 struct partial_symtab
*);
1613 static void get_scope_pc_bounds (struct die_info
*,
1614 CORE_ADDR
*, CORE_ADDR
*,
1615 struct dwarf2_cu
*);
1617 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1618 CORE_ADDR
, struct dwarf2_cu
*);
1620 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1621 struct dwarf2_cu
*);
1623 static void dwarf2_attach_fields_to_type (struct field_info
*,
1624 struct type
*, struct dwarf2_cu
*);
1626 static void dwarf2_add_member_fn (struct field_info
*,
1627 struct die_info
*, struct type
*,
1628 struct dwarf2_cu
*);
1630 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1632 struct dwarf2_cu
*);
1634 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1636 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1638 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1640 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1642 static struct using_direct
**using_directives (enum language
);
1644 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1646 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1648 static struct type
*read_module_type (struct die_info
*die
,
1649 struct dwarf2_cu
*cu
);
1651 static const char *namespace_name (struct die_info
*die
,
1652 int *is_anonymous
, struct dwarf2_cu
*);
1654 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1656 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1658 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1659 struct dwarf2_cu
*);
1661 static struct die_info
*read_die_and_siblings_1
1662 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1665 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1666 const gdb_byte
*info_ptr
,
1667 const gdb_byte
**new_info_ptr
,
1668 struct die_info
*parent
);
1670 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1671 struct die_info
**, const gdb_byte
*,
1674 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1675 struct die_info
**, const gdb_byte
*,
1678 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1680 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1683 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1685 static const char *dwarf2_full_name (const char *name
,
1686 struct die_info
*die
,
1687 struct dwarf2_cu
*cu
);
1689 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1690 struct dwarf2_cu
*cu
);
1692 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1693 struct dwarf2_cu
**);
1695 static const char *dwarf_tag_name (unsigned int);
1697 static const char *dwarf_attr_name (unsigned int);
1699 static const char *dwarf_form_name (unsigned int);
1701 static char *dwarf_bool_name (unsigned int);
1703 static const char *dwarf_type_encoding_name (unsigned int);
1705 static struct die_info
*sibling_die (struct die_info
*);
1707 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1709 static void dump_die_for_error (struct die_info
*);
1711 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1714 /*static*/ void dump_die (struct die_info
*, int max_level
);
1716 static void store_in_ref_table (struct die_info
*,
1717 struct dwarf2_cu
*);
1719 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1721 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1723 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1724 const struct attribute
*,
1725 struct dwarf2_cu
**);
1727 static struct die_info
*follow_die_ref (struct die_info
*,
1728 const struct attribute
*,
1729 struct dwarf2_cu
**);
1731 static struct die_info
*follow_die_sig (struct die_info
*,
1732 const struct attribute
*,
1733 struct dwarf2_cu
**);
1735 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1736 struct dwarf2_cu
*);
1738 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1739 const struct attribute
*,
1740 struct dwarf2_cu
*);
1742 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1744 static void read_signatured_type (struct signatured_type
*);
1746 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1747 struct die_info
*die
, struct dwarf2_cu
*cu
,
1748 struct dynamic_prop
*prop
);
1750 /* memory allocation interface */
1752 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1754 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1756 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1758 static int attr_form_is_block (const struct attribute
*);
1760 static int attr_form_is_section_offset (const struct attribute
*);
1762 static int attr_form_is_constant (const struct attribute
*);
1764 static int attr_form_is_ref (const struct attribute
*);
1766 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1767 struct dwarf2_loclist_baton
*baton
,
1768 const struct attribute
*attr
);
1770 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1772 struct dwarf2_cu
*cu
,
1775 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1776 const gdb_byte
*info_ptr
,
1777 struct abbrev_info
*abbrev
);
1779 static void free_stack_comp_unit (void *);
1781 static hashval_t
partial_die_hash (const void *item
);
1783 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1785 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1786 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1788 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1789 struct dwarf2_per_cu_data
*per_cu
);
1791 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1792 struct die_info
*comp_unit_die
,
1793 enum language pretend_language
);
1795 static void free_heap_comp_unit (void *);
1797 static void free_cached_comp_units (void *);
1799 static void age_cached_comp_units (void);
1801 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1803 static struct type
*set_die_type (struct die_info
*, struct type
*,
1804 struct dwarf2_cu
*);
1806 static void create_all_comp_units (struct objfile
*);
1808 static int create_all_type_units (struct objfile
*);
1810 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1813 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1816 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1819 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1820 struct dwarf2_per_cu_data
*);
1822 static void dwarf2_mark (struct dwarf2_cu
*);
1824 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1826 static struct type
*get_die_type_at_offset (sect_offset
,
1827 struct dwarf2_per_cu_data
*);
1829 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1831 static void dwarf2_release_queue (void *dummy
);
1833 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1834 enum language pretend_language
);
1836 static void process_queue (void);
1838 static void find_file_and_directory (struct die_info
*die
,
1839 struct dwarf2_cu
*cu
,
1840 const char **name
, const char **comp_dir
);
1842 static char *file_full_name (int file
, struct line_header
*lh
,
1843 const char *comp_dir
);
1845 static const gdb_byte
*read_and_check_comp_unit_head
1846 (struct comp_unit_head
*header
,
1847 struct dwarf2_section_info
*section
,
1848 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1849 int is_debug_types_section
);
1851 static void init_cutu_and_read_dies
1852 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1853 int use_existing_cu
, int keep
,
1854 die_reader_func_ftype
*die_reader_func
, void *data
);
1856 static void init_cutu_and_read_dies_simple
1857 (struct dwarf2_per_cu_data
*this_cu
,
1858 die_reader_func_ftype
*die_reader_func
, void *data
);
1860 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1862 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1864 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1865 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1866 ULONGEST signature
, int is_debug_types
);
1868 static struct dwp_file
*get_dwp_file (void);
1870 static struct dwo_unit
*lookup_dwo_comp_unit
1871 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1873 static struct dwo_unit
*lookup_dwo_type_unit
1874 (struct signatured_type
*, const char *, const char *);
1876 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1878 static void free_dwo_file_cleanup (void *);
1880 static void process_cu_includes (void);
1882 static void check_producer (struct dwarf2_cu
*cu
);
1884 static void free_line_header_voidp (void *arg
);
1886 /* Various complaints about symbol reading that don't abort the process. */
1889 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1891 complaint (&symfile_complaints
,
1892 _("statement list doesn't fit in .debug_line section"));
1896 dwarf2_debug_line_missing_file_complaint (void)
1898 complaint (&symfile_complaints
,
1899 _(".debug_line section has line data without a file"));
1903 dwarf2_debug_line_missing_end_sequence_complaint (void)
1905 complaint (&symfile_complaints
,
1906 _(".debug_line section has line "
1907 "program sequence without an end"));
1911 dwarf2_complex_location_expr_complaint (void)
1913 complaint (&symfile_complaints
, _("location expression too complex"));
1917 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1920 complaint (&symfile_complaints
,
1921 _("const value length mismatch for '%s', got %d, expected %d"),
1926 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1928 complaint (&symfile_complaints
,
1929 _("debug info runs off end of %s section"
1931 get_section_name (section
),
1932 get_section_file_name (section
));
1936 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1938 complaint (&symfile_complaints
,
1939 _("macro debug info contains a "
1940 "malformed macro definition:\n`%s'"),
1945 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1947 complaint (&symfile_complaints
,
1948 _("invalid attribute class or form for '%s' in '%s'"),
1952 /* Hash function for line_header_hash. */
1955 line_header_hash (const struct line_header
*ofs
)
1957 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1960 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1963 line_header_hash_voidp (const void *item
)
1965 const struct line_header
*ofs
= item
;
1967 return line_header_hash (ofs
);
1970 /* Equality function for line_header_hash. */
1973 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1975 const struct line_header
*ofs_lhs
= item_lhs
;
1976 const struct line_header
*ofs_rhs
= item_rhs
;
1978 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
1979 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1985 /* Convert VALUE between big- and little-endian. */
1987 byte_swap (offset_type value
)
1991 result
= (value
& 0xff) << 24;
1992 result
|= (value
& 0xff00) << 8;
1993 result
|= (value
& 0xff0000) >> 8;
1994 result
|= (value
& 0xff000000) >> 24;
1998 #define MAYBE_SWAP(V) byte_swap (V)
2001 #define MAYBE_SWAP(V) (V)
2002 #endif /* WORDS_BIGENDIAN */
2004 /* Read the given attribute value as an address, taking the attribute's
2005 form into account. */
2008 attr_value_as_address (struct attribute
*attr
)
2012 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2014 /* Aside from a few clearly defined exceptions, attributes that
2015 contain an address must always be in DW_FORM_addr form.
2016 Unfortunately, some compilers happen to be violating this
2017 requirement by encoding addresses using other forms, such
2018 as DW_FORM_data4 for example. For those broken compilers,
2019 we try to do our best, without any guarantee of success,
2020 to interpret the address correctly. It would also be nice
2021 to generate a complaint, but that would require us to maintain
2022 a list of legitimate cases where a non-address form is allowed,
2023 as well as update callers to pass in at least the CU's DWARF
2024 version. This is more overhead than what we're willing to
2025 expand for a pretty rare case. */
2026 addr
= DW_UNSND (attr
);
2029 addr
= DW_ADDR (attr
);
2034 /* The suffix for an index file. */
2035 #define INDEX_SUFFIX ".gdb-index"
2037 /* Try to locate the sections we need for DWARF 2 debugging
2038 information and return true if we have enough to do something.
2039 NAMES points to the dwarf2 section names, or is NULL if the standard
2040 ELF names are used. */
2043 dwarf2_has_info (struct objfile
*objfile
,
2044 const struct dwarf2_debug_sections
*names
)
2046 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2047 if (!dwarf2_per_objfile
)
2049 /* Initialize per-objfile state. */
2050 struct dwarf2_per_objfile
*data
2051 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2053 memset (data
, 0, sizeof (*data
));
2054 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2055 dwarf2_per_objfile
= data
;
2057 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2059 dwarf2_per_objfile
->objfile
= objfile
;
2061 return (!dwarf2_per_objfile
->info
.is_virtual
2062 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2063 && !dwarf2_per_objfile
->abbrev
.is_virtual
2064 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2067 /* Return the containing section of virtual section SECTION. */
2069 static struct dwarf2_section_info
*
2070 get_containing_section (const struct dwarf2_section_info
*section
)
2072 gdb_assert (section
->is_virtual
);
2073 return section
->s
.containing_section
;
2076 /* Return the bfd owner of SECTION. */
2079 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2081 if (section
->is_virtual
)
2083 section
= get_containing_section (section
);
2084 gdb_assert (!section
->is_virtual
);
2086 return section
->s
.section
->owner
;
2089 /* Return the bfd section of SECTION.
2090 Returns NULL if the section is not present. */
2093 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2095 if (section
->is_virtual
)
2097 section
= get_containing_section (section
);
2098 gdb_assert (!section
->is_virtual
);
2100 return section
->s
.section
;
2103 /* Return the name of SECTION. */
2106 get_section_name (const struct dwarf2_section_info
*section
)
2108 asection
*sectp
= get_section_bfd_section (section
);
2110 gdb_assert (sectp
!= NULL
);
2111 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2114 /* Return the name of the file SECTION is in. */
2117 get_section_file_name (const struct dwarf2_section_info
*section
)
2119 bfd
*abfd
= get_section_bfd_owner (section
);
2121 return bfd_get_filename (abfd
);
2124 /* Return the id of SECTION.
2125 Returns 0 if SECTION doesn't exist. */
2128 get_section_id (const struct dwarf2_section_info
*section
)
2130 asection
*sectp
= get_section_bfd_section (section
);
2137 /* Return the flags of SECTION.
2138 SECTION (or containing section if this is a virtual section) must exist. */
2141 get_section_flags (const struct dwarf2_section_info
*section
)
2143 asection
*sectp
= get_section_bfd_section (section
);
2145 gdb_assert (sectp
!= NULL
);
2146 return bfd_get_section_flags (sectp
->owner
, sectp
);
2149 /* When loading sections, we look either for uncompressed section or for
2150 compressed section names. */
2153 section_is_p (const char *section_name
,
2154 const struct dwarf2_section_names
*names
)
2156 if (names
->normal
!= NULL
2157 && strcmp (section_name
, names
->normal
) == 0)
2159 if (names
->compressed
!= NULL
2160 && strcmp (section_name
, names
->compressed
) == 0)
2165 /* This function is mapped across the sections and remembers the
2166 offset and size of each of the debugging sections we are interested
2170 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2172 const struct dwarf2_debug_sections
*names
;
2173 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2176 names
= &dwarf2_elf_names
;
2178 names
= (const struct dwarf2_debug_sections
*) vnames
;
2180 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2183 else if (section_is_p (sectp
->name
, &names
->info
))
2185 dwarf2_per_objfile
->info
.s
.section
= sectp
;
2186 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2188 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2190 dwarf2_per_objfile
->abbrev
.s
.section
= sectp
;
2191 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2193 else if (section_is_p (sectp
->name
, &names
->line
))
2195 dwarf2_per_objfile
->line
.s
.section
= sectp
;
2196 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2198 else if (section_is_p (sectp
->name
, &names
->loc
))
2200 dwarf2_per_objfile
->loc
.s
.section
= sectp
;
2201 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2203 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2205 dwarf2_per_objfile
->macinfo
.s
.section
= sectp
;
2206 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2208 else if (section_is_p (sectp
->name
, &names
->macro
))
2210 dwarf2_per_objfile
->macro
.s
.section
= sectp
;
2211 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2213 else if (section_is_p (sectp
->name
, &names
->str
))
2215 dwarf2_per_objfile
->str
.s
.section
= sectp
;
2216 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2218 else if (section_is_p (sectp
->name
, &names
->addr
))
2220 dwarf2_per_objfile
->addr
.s
.section
= sectp
;
2221 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2223 else if (section_is_p (sectp
->name
, &names
->frame
))
2225 dwarf2_per_objfile
->frame
.s
.section
= sectp
;
2226 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2228 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2230 dwarf2_per_objfile
->eh_frame
.s
.section
= sectp
;
2231 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2233 else if (section_is_p (sectp
->name
, &names
->ranges
))
2235 dwarf2_per_objfile
->ranges
.s
.section
= sectp
;
2236 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2238 else if (section_is_p (sectp
->name
, &names
->types
))
2240 struct dwarf2_section_info type_section
;
2242 memset (&type_section
, 0, sizeof (type_section
));
2243 type_section
.s
.section
= sectp
;
2244 type_section
.size
= bfd_get_section_size (sectp
);
2246 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2249 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2251 dwarf2_per_objfile
->gdb_index
.s
.section
= sectp
;
2252 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2255 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2256 && bfd_section_vma (abfd
, sectp
) == 0)
2257 dwarf2_per_objfile
->has_section_at_zero
= 1;
2260 /* A helper function that decides whether a section is empty,
2264 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2266 if (section
->is_virtual
)
2267 return section
->size
== 0;
2268 return section
->s
.section
== NULL
|| section
->size
== 0;
2271 /* Read the contents of the section INFO.
2272 OBJFILE is the main object file, but not necessarily the file where
2273 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2275 If the section is compressed, uncompress it before returning. */
2278 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2282 gdb_byte
*buf
, *retbuf
;
2286 info
->buffer
= NULL
;
2289 if (dwarf2_section_empty_p (info
))
2292 sectp
= get_section_bfd_section (info
);
2294 /* If this is a virtual section we need to read in the real one first. */
2295 if (info
->is_virtual
)
2297 struct dwarf2_section_info
*containing_section
=
2298 get_containing_section (info
);
2300 gdb_assert (sectp
!= NULL
);
2301 if ((sectp
->flags
& SEC_RELOC
) != 0)
2303 error (_("Dwarf Error: DWP format V2 with relocations is not"
2304 " supported in section %s [in module %s]"),
2305 get_section_name (info
), get_section_file_name (info
));
2307 dwarf2_read_section (objfile
, containing_section
);
2308 /* Other code should have already caught virtual sections that don't
2310 gdb_assert (info
->virtual_offset
+ info
->size
2311 <= containing_section
->size
);
2312 /* If the real section is empty or there was a problem reading the
2313 section we shouldn't get here. */
2314 gdb_assert (containing_section
->buffer
!= NULL
);
2315 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2319 /* If the section has relocations, we must read it ourselves.
2320 Otherwise we attach it to the BFD. */
2321 if ((sectp
->flags
& SEC_RELOC
) == 0)
2323 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2327 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2330 /* When debugging .o files, we may need to apply relocations; see
2331 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2332 We never compress sections in .o files, so we only need to
2333 try this when the section is not compressed. */
2334 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2337 info
->buffer
= retbuf
;
2341 abfd
= get_section_bfd_owner (info
);
2342 gdb_assert (abfd
!= NULL
);
2344 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2345 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2347 error (_("Dwarf Error: Can't read DWARF data"
2348 " in section %s [in module %s]"),
2349 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2353 /* A helper function that returns the size of a section in a safe way.
2354 If you are positive that the section has been read before using the
2355 size, then it is safe to refer to the dwarf2_section_info object's
2356 "size" field directly. In other cases, you must call this
2357 function, because for compressed sections the size field is not set
2358 correctly until the section has been read. */
2360 static bfd_size_type
2361 dwarf2_section_size (struct objfile
*objfile
,
2362 struct dwarf2_section_info
*info
)
2365 dwarf2_read_section (objfile
, info
);
2369 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2373 dwarf2_get_section_info (struct objfile
*objfile
,
2374 enum dwarf2_section_enum sect
,
2375 asection
**sectp
, const gdb_byte
**bufp
,
2376 bfd_size_type
*sizep
)
2378 struct dwarf2_per_objfile
*data
2379 = objfile_data (objfile
, dwarf2_objfile_data_key
);
2380 struct dwarf2_section_info
*info
;
2382 /* We may see an objfile without any DWARF, in which case we just
2393 case DWARF2_DEBUG_FRAME
:
2394 info
= &data
->frame
;
2396 case DWARF2_EH_FRAME
:
2397 info
= &data
->eh_frame
;
2400 gdb_assert_not_reached ("unexpected section");
2403 dwarf2_read_section (objfile
, info
);
2405 *sectp
= get_section_bfd_section (info
);
2406 *bufp
= info
->buffer
;
2407 *sizep
= info
->size
;
2410 /* A helper function to find the sections for a .dwz file. */
2413 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2415 struct dwz_file
*dwz_file
= arg
;
2417 /* Note that we only support the standard ELF names, because .dwz
2418 is ELF-only (at the time of writing). */
2419 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2421 dwz_file
->abbrev
.s
.section
= sectp
;
2422 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2424 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2426 dwz_file
->info
.s
.section
= sectp
;
2427 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2429 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2431 dwz_file
->str
.s
.section
= sectp
;
2432 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2434 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2436 dwz_file
->line
.s
.section
= sectp
;
2437 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2439 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2441 dwz_file
->macro
.s
.section
= sectp
;
2442 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2444 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2446 dwz_file
->gdb_index
.s
.section
= sectp
;
2447 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2451 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2452 there is no .gnu_debugaltlink section in the file. Error if there
2453 is such a section but the file cannot be found. */
2455 static struct dwz_file
*
2456 dwarf2_get_dwz_file (void)
2460 struct cleanup
*cleanup
;
2461 const char *filename
;
2462 struct dwz_file
*result
;
2463 bfd_size_type buildid_len_arg
;
2467 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2468 return dwarf2_per_objfile
->dwz_file
;
2470 bfd_set_error (bfd_error_no_error
);
2471 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2472 &buildid_len_arg
, &buildid
);
2475 if (bfd_get_error () == bfd_error_no_error
)
2477 error (_("could not read '.gnu_debugaltlink' section: %s"),
2478 bfd_errmsg (bfd_get_error ()));
2480 cleanup
= make_cleanup (xfree
, data
);
2481 make_cleanup (xfree
, buildid
);
2483 buildid_len
= (size_t) buildid_len_arg
;
2485 filename
= (const char *) data
;
2486 if (!IS_ABSOLUTE_PATH (filename
))
2488 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2491 make_cleanup (xfree
, abs
);
2492 abs
= ldirname (abs
);
2493 make_cleanup (xfree
, abs
);
2495 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2496 make_cleanup (xfree
, rel
);
2500 /* First try the file name given in the section. If that doesn't
2501 work, try to use the build-id instead. */
2502 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2503 if (dwz_bfd
!= NULL
)
2505 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2507 gdb_bfd_unref (dwz_bfd
);
2512 if (dwz_bfd
== NULL
)
2513 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2515 if (dwz_bfd
== NULL
)
2516 error (_("could not find '.gnu_debugaltlink' file for %s"),
2517 objfile_name (dwarf2_per_objfile
->objfile
));
2519 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2521 result
->dwz_bfd
= dwz_bfd
;
2523 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2525 do_cleanups (cleanup
);
2527 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2528 dwarf2_per_objfile
->dwz_file
= result
;
2532 /* DWARF quick_symbols_functions support. */
2534 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2535 unique line tables, so we maintain a separate table of all .debug_line
2536 derived entries to support the sharing.
2537 All the quick functions need is the list of file names. We discard the
2538 line_header when we're done and don't need to record it here. */
2539 struct quick_file_names
2541 /* The data used to construct the hash key. */
2542 struct stmt_list_hash hash
;
2544 /* The number of entries in file_names, real_names. */
2545 unsigned int num_file_names
;
2547 /* The file names from the line table, after being run through
2549 const char **file_names
;
2551 /* The file names from the line table after being run through
2552 gdb_realpath. These are computed lazily. */
2553 const char **real_names
;
2556 /* When using the index (and thus not using psymtabs), each CU has an
2557 object of this type. This is used to hold information needed by
2558 the various "quick" methods. */
2559 struct dwarf2_per_cu_quick_data
2561 /* The file table. This can be NULL if there was no file table
2562 or it's currently not read in.
2563 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2564 struct quick_file_names
*file_names
;
2566 /* The corresponding symbol table. This is NULL if symbols for this
2567 CU have not yet been read. */
2568 struct compunit_symtab
*compunit_symtab
;
2570 /* A temporary mark bit used when iterating over all CUs in
2571 expand_symtabs_matching. */
2572 unsigned int mark
: 1;
2574 /* True if we've tried to read the file table and found there isn't one.
2575 There will be no point in trying to read it again next time. */
2576 unsigned int no_file_data
: 1;
2579 /* Utility hash function for a stmt_list_hash. */
2582 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2586 if (stmt_list_hash
->dwo_unit
!= NULL
)
2587 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2588 v
+= stmt_list_hash
->line_offset
.sect_off
;
2592 /* Utility equality function for a stmt_list_hash. */
2595 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2596 const struct stmt_list_hash
*rhs
)
2598 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2600 if (lhs
->dwo_unit
!= NULL
2601 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2604 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2607 /* Hash function for a quick_file_names. */
2610 hash_file_name_entry (const void *e
)
2612 const struct quick_file_names
*file_data
= e
;
2614 return hash_stmt_list_entry (&file_data
->hash
);
2617 /* Equality function for a quick_file_names. */
2620 eq_file_name_entry (const void *a
, const void *b
)
2622 const struct quick_file_names
*ea
= a
;
2623 const struct quick_file_names
*eb
= b
;
2625 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2628 /* Delete function for a quick_file_names. */
2631 delete_file_name_entry (void *e
)
2633 struct quick_file_names
*file_data
= e
;
2636 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2638 xfree ((void*) file_data
->file_names
[i
]);
2639 if (file_data
->real_names
)
2640 xfree ((void*) file_data
->real_names
[i
]);
2643 /* The space for the struct itself lives on objfile_obstack,
2644 so we don't free it here. */
2647 /* Create a quick_file_names hash table. */
2650 create_quick_file_names_table (unsigned int nr_initial_entries
)
2652 return htab_create_alloc (nr_initial_entries
,
2653 hash_file_name_entry
, eq_file_name_entry
,
2654 delete_file_name_entry
, xcalloc
, xfree
);
2657 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2658 have to be created afterwards. You should call age_cached_comp_units after
2659 processing PER_CU->CU. dw2_setup must have been already called. */
2662 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2664 if (per_cu
->is_debug_types
)
2665 load_full_type_unit (per_cu
);
2667 load_full_comp_unit (per_cu
, language_minimal
);
2669 if (per_cu
->cu
== NULL
)
2670 return; /* Dummy CU. */
2672 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2675 /* Read in the symbols for PER_CU. */
2678 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2680 struct cleanup
*back_to
;
2682 /* Skip type_unit_groups, reading the type units they contain
2683 is handled elsewhere. */
2684 if (IS_TYPE_UNIT_GROUP (per_cu
))
2687 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2689 if (dwarf2_per_objfile
->using_index
2690 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2691 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2693 queue_comp_unit (per_cu
, language_minimal
);
2696 /* If we just loaded a CU from a DWO, and we're working with an index
2697 that may badly handle TUs, load all the TUs in that DWO as well.
2698 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2699 if (!per_cu
->is_debug_types
2700 && per_cu
->cu
!= NULL
2701 && per_cu
->cu
->dwo_unit
!= NULL
2702 && dwarf2_per_objfile
->index_table
!= NULL
2703 && dwarf2_per_objfile
->index_table
->version
<= 7
2704 /* DWP files aren't supported yet. */
2705 && get_dwp_file () == NULL
)
2706 queue_and_load_all_dwo_tus (per_cu
);
2711 /* Age the cache, releasing compilation units that have not
2712 been used recently. */
2713 age_cached_comp_units ();
2715 do_cleanups (back_to
);
2718 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2719 the objfile from which this CU came. Returns the resulting symbol
2722 static struct compunit_symtab
*
2723 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2725 gdb_assert (dwarf2_per_objfile
->using_index
);
2726 if (!per_cu
->v
.quick
->compunit_symtab
)
2728 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2729 increment_reading_symtab ();
2730 dw2_do_instantiate_symtab (per_cu
);
2731 process_cu_includes ();
2732 do_cleanups (back_to
);
2735 return per_cu
->v
.quick
->compunit_symtab
;
2738 /* Return the CU/TU given its index.
2740 This is intended for loops like:
2742 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2743 + dwarf2_per_objfile->n_type_units); ++i)
2745 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2751 static struct dwarf2_per_cu_data
*
2752 dw2_get_cutu (int index
)
2754 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2756 index
-= dwarf2_per_objfile
->n_comp_units
;
2757 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2758 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2761 return dwarf2_per_objfile
->all_comp_units
[index
];
2764 /* Return the CU given its index.
2765 This differs from dw2_get_cutu in that it's for when you know INDEX
2768 static struct dwarf2_per_cu_data
*
2769 dw2_get_cu (int index
)
2771 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2773 return dwarf2_per_objfile
->all_comp_units
[index
];
2776 /* A helper for create_cus_from_index that handles a given list of
2780 create_cus_from_index_list (struct objfile
*objfile
,
2781 const gdb_byte
*cu_list
, offset_type n_elements
,
2782 struct dwarf2_section_info
*section
,
2788 for (i
= 0; i
< n_elements
; i
+= 2)
2790 struct dwarf2_per_cu_data
*the_cu
;
2791 ULONGEST offset
, length
;
2793 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2794 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2795 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2798 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2799 struct dwarf2_per_cu_data
);
2800 the_cu
->offset
.sect_off
= offset
;
2801 the_cu
->length
= length
;
2802 the_cu
->objfile
= objfile
;
2803 the_cu
->section
= section
;
2804 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2805 struct dwarf2_per_cu_quick_data
);
2806 the_cu
->is_dwz
= is_dwz
;
2807 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2811 /* Read the CU list from the mapped index, and use it to create all
2812 the CU objects for this objfile. */
2815 create_cus_from_index (struct objfile
*objfile
,
2816 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2817 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2819 struct dwz_file
*dwz
;
2821 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2822 dwarf2_per_objfile
->all_comp_units
=
2823 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
2824 dwarf2_per_objfile
->n_comp_units
);
2826 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2827 &dwarf2_per_objfile
->info
, 0, 0);
2829 if (dwz_elements
== 0)
2832 dwz
= dwarf2_get_dwz_file ();
2833 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2834 cu_list_elements
/ 2);
2837 /* Create the signatured type hash table from the index. */
2840 create_signatured_type_table_from_index (struct objfile
*objfile
,
2841 struct dwarf2_section_info
*section
,
2842 const gdb_byte
*bytes
,
2843 offset_type elements
)
2846 htab_t sig_types_hash
;
2848 dwarf2_per_objfile
->n_type_units
2849 = dwarf2_per_objfile
->n_allocated_type_units
2851 dwarf2_per_objfile
->all_type_units
=
2852 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
2854 sig_types_hash
= allocate_signatured_type_table (objfile
);
2856 for (i
= 0; i
< elements
; i
+= 3)
2858 struct signatured_type
*sig_type
;
2859 ULONGEST offset
, type_offset_in_tu
, signature
;
2862 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2863 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2864 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2866 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2869 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2870 struct signatured_type
);
2871 sig_type
->signature
= signature
;
2872 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2873 sig_type
->per_cu
.is_debug_types
= 1;
2874 sig_type
->per_cu
.section
= section
;
2875 sig_type
->per_cu
.offset
.sect_off
= offset
;
2876 sig_type
->per_cu
.objfile
= objfile
;
2877 sig_type
->per_cu
.v
.quick
2878 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2879 struct dwarf2_per_cu_quick_data
);
2881 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2884 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2887 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2890 /* Read the address map data from the mapped index, and use it to
2891 populate the objfile's psymtabs_addrmap. */
2894 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2896 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2897 const gdb_byte
*iter
, *end
;
2898 struct obstack temp_obstack
;
2899 struct addrmap
*mutable_map
;
2900 struct cleanup
*cleanup
;
2903 obstack_init (&temp_obstack
);
2904 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2905 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2907 iter
= index
->address_table
;
2908 end
= iter
+ index
->address_table_size
;
2910 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2914 ULONGEST hi
, lo
, cu_index
;
2915 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2917 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2919 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2924 complaint (&symfile_complaints
,
2925 _(".gdb_index address table has invalid range (%s - %s)"),
2926 hex_string (lo
), hex_string (hi
));
2930 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2932 complaint (&symfile_complaints
,
2933 _(".gdb_index address table has invalid CU number %u"),
2934 (unsigned) cu_index
);
2938 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2939 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2940 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2943 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2944 &objfile
->objfile_obstack
);
2945 do_cleanups (cleanup
);
2948 /* The hash function for strings in the mapped index. This is the same as
2949 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2950 implementation. This is necessary because the hash function is tied to the
2951 format of the mapped index file. The hash values do not have to match with
2954 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2957 mapped_index_string_hash (int index_version
, const void *p
)
2959 const unsigned char *str
= (const unsigned char *) p
;
2963 while ((c
= *str
++) != 0)
2965 if (index_version
>= 5)
2967 r
= r
* 67 + c
- 113;
2973 /* Find a slot in the mapped index INDEX for the object named NAME.
2974 If NAME is found, set *VEC_OUT to point to the CU vector in the
2975 constant pool and return 1. If NAME cannot be found, return 0. */
2978 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2979 offset_type
**vec_out
)
2981 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2983 offset_type slot
, step
;
2984 int (*cmp
) (const char *, const char *);
2986 if (current_language
->la_language
== language_cplus
2987 || current_language
->la_language
== language_java
2988 || current_language
->la_language
== language_fortran
2989 || current_language
->la_language
== language_d
)
2991 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2994 if (strchr (name
, '(') != NULL
)
2996 char *without_params
= cp_remove_params (name
);
2998 if (without_params
!= NULL
)
3000 make_cleanup (xfree
, without_params
);
3001 name
= without_params
;
3006 /* Index version 4 did not support case insensitive searches. But the
3007 indices for case insensitive languages are built in lowercase, therefore
3008 simulate our NAME being searched is also lowercased. */
3009 hash
= mapped_index_string_hash ((index
->version
== 4
3010 && case_sensitivity
== case_sensitive_off
3011 ? 5 : index
->version
),
3014 slot
= hash
& (index
->symbol_table_slots
- 1);
3015 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3016 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3020 /* Convert a slot number to an offset into the table. */
3021 offset_type i
= 2 * slot
;
3023 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3025 do_cleanups (back_to
);
3029 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3030 if (!cmp (name
, str
))
3032 *vec_out
= (offset_type
*) (index
->constant_pool
3033 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3034 do_cleanups (back_to
);
3038 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3042 /* A helper function that reads the .gdb_index from SECTION and fills
3043 in MAP. FILENAME is the name of the file containing the section;
3044 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3045 ok to use deprecated sections.
3047 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3048 out parameters that are filled in with information about the CU and
3049 TU lists in the section.
3051 Returns 1 if all went well, 0 otherwise. */
3054 read_index_from_section (struct objfile
*objfile
,
3055 const char *filename
,
3057 struct dwarf2_section_info
*section
,
3058 struct mapped_index
*map
,
3059 const gdb_byte
**cu_list
,
3060 offset_type
*cu_list_elements
,
3061 const gdb_byte
**types_list
,
3062 offset_type
*types_list_elements
)
3064 const gdb_byte
*addr
;
3065 offset_type version
;
3066 offset_type
*metadata
;
3069 if (dwarf2_section_empty_p (section
))
3072 /* Older elfutils strip versions could keep the section in the main
3073 executable while splitting it for the separate debug info file. */
3074 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3077 dwarf2_read_section (objfile
, section
);
3079 addr
= section
->buffer
;
3080 /* Version check. */
3081 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3082 /* Versions earlier than 3 emitted every copy of a psymbol. This
3083 causes the index to behave very poorly for certain requests. Version 3
3084 contained incomplete addrmap. So, it seems better to just ignore such
3088 static int warning_printed
= 0;
3089 if (!warning_printed
)
3091 warning (_("Skipping obsolete .gdb_index section in %s."),
3093 warning_printed
= 1;
3097 /* Index version 4 uses a different hash function than index version
3100 Versions earlier than 6 did not emit psymbols for inlined
3101 functions. Using these files will cause GDB not to be able to
3102 set breakpoints on inlined functions by name, so we ignore these
3103 indices unless the user has done
3104 "set use-deprecated-index-sections on". */
3105 if (version
< 6 && !deprecated_ok
)
3107 static int warning_printed
= 0;
3108 if (!warning_printed
)
3111 Skipping deprecated .gdb_index section in %s.\n\
3112 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3113 to use the section anyway."),
3115 warning_printed
= 1;
3119 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3120 of the TU (for symbols coming from TUs),
3121 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3122 Plus gold-generated indices can have duplicate entries for global symbols,
3123 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3124 These are just performance bugs, and we can't distinguish gdb-generated
3125 indices from gold-generated ones, so issue no warning here. */
3127 /* Indexes with higher version than the one supported by GDB may be no
3128 longer backward compatible. */
3132 map
->version
= version
;
3133 map
->total_size
= section
->size
;
3135 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3138 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3139 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3143 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3144 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3145 - MAYBE_SWAP (metadata
[i
]))
3149 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3150 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3151 - MAYBE_SWAP (metadata
[i
]));
3154 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3155 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3156 - MAYBE_SWAP (metadata
[i
]))
3157 / (2 * sizeof (offset_type
)));
3160 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3166 /* Read the index file. If everything went ok, initialize the "quick"
3167 elements of all the CUs and return 1. Otherwise, return 0. */
3170 dwarf2_read_index (struct objfile
*objfile
)
3172 struct mapped_index local_map
, *map
;
3173 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3174 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3175 struct dwz_file
*dwz
;
3177 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3178 use_deprecated_index_sections
,
3179 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3180 &cu_list
, &cu_list_elements
,
3181 &types_list
, &types_list_elements
))
3184 /* Don't use the index if it's empty. */
3185 if (local_map
.symbol_table_slots
== 0)
3188 /* If there is a .dwz file, read it so we can get its CU list as
3190 dwz
= dwarf2_get_dwz_file ();
3193 struct mapped_index dwz_map
;
3194 const gdb_byte
*dwz_types_ignore
;
3195 offset_type dwz_types_elements_ignore
;
3197 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3199 &dwz
->gdb_index
, &dwz_map
,
3200 &dwz_list
, &dwz_list_elements
,
3202 &dwz_types_elements_ignore
))
3204 warning (_("could not read '.gdb_index' section from %s; skipping"),
3205 bfd_get_filename (dwz
->dwz_bfd
));
3210 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3213 if (types_list_elements
)
3215 struct dwarf2_section_info
*section
;
3217 /* We can only handle a single .debug_types when we have an
3219 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3222 section
= VEC_index (dwarf2_section_info_def
,
3223 dwarf2_per_objfile
->types
, 0);
3225 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3226 types_list_elements
);
3229 create_addrmap_from_index (objfile
, &local_map
);
3231 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3234 dwarf2_per_objfile
->index_table
= map
;
3235 dwarf2_per_objfile
->using_index
= 1;
3236 dwarf2_per_objfile
->quick_file_names_table
=
3237 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3242 /* A helper for the "quick" functions which sets the global
3243 dwarf2_per_objfile according to OBJFILE. */
3246 dw2_setup (struct objfile
*objfile
)
3248 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
3249 gdb_assert (dwarf2_per_objfile
);
3252 /* die_reader_func for dw2_get_file_names. */
3255 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3256 const gdb_byte
*info_ptr
,
3257 struct die_info
*comp_unit_die
,
3261 struct dwarf2_cu
*cu
= reader
->cu
;
3262 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3263 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3264 struct dwarf2_per_cu_data
*lh_cu
;
3265 struct line_header
*lh
;
3266 struct attribute
*attr
;
3268 const char *name
, *comp_dir
;
3270 struct quick_file_names
*qfn
;
3271 unsigned int line_offset
;
3273 gdb_assert (! this_cu
->is_debug_types
);
3275 /* Our callers never want to match partial units -- instead they
3276 will match the enclosing full CU. */
3277 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3279 this_cu
->v
.quick
->no_file_data
= 1;
3288 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3291 struct quick_file_names find_entry
;
3293 line_offset
= DW_UNSND (attr
);
3295 /* We may have already read in this line header (TU line header sharing).
3296 If we have we're done. */
3297 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3298 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3299 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3300 &find_entry
, INSERT
);
3303 lh_cu
->v
.quick
->file_names
= *slot
;
3307 lh
= dwarf_decode_line_header (line_offset
, cu
);
3311 lh_cu
->v
.quick
->no_file_data
= 1;
3315 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3316 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3317 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3318 gdb_assert (slot
!= NULL
);
3321 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3323 qfn
->num_file_names
= lh
->num_file_names
;
3325 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->num_file_names
);
3326 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3327 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3328 qfn
->real_names
= NULL
;
3330 free_line_header (lh
);
3332 lh_cu
->v
.quick
->file_names
= qfn
;
3335 /* A helper for the "quick" functions which attempts to read the line
3336 table for THIS_CU. */
3338 static struct quick_file_names
*
3339 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3341 /* This should never be called for TUs. */
3342 gdb_assert (! this_cu
->is_debug_types
);
3343 /* Nor type unit groups. */
3344 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3346 if (this_cu
->v
.quick
->file_names
!= NULL
)
3347 return this_cu
->v
.quick
->file_names
;
3348 /* If we know there is no line data, no point in looking again. */
3349 if (this_cu
->v
.quick
->no_file_data
)
3352 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3354 if (this_cu
->v
.quick
->no_file_data
)
3356 return this_cu
->v
.quick
->file_names
;
3359 /* A helper for the "quick" functions which computes and caches the
3360 real path for a given file name from the line table. */
3363 dw2_get_real_path (struct objfile
*objfile
,
3364 struct quick_file_names
*qfn
, int index
)
3366 if (qfn
->real_names
== NULL
)
3367 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3368 qfn
->num_file_names
, const char *);
3370 if (qfn
->real_names
[index
] == NULL
)
3371 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3373 return qfn
->real_names
[index
];
3376 static struct symtab
*
3377 dw2_find_last_source_symtab (struct objfile
*objfile
)
3379 struct compunit_symtab
*cust
;
3382 dw2_setup (objfile
);
3383 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3384 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3387 return compunit_primary_filetab (cust
);
3390 /* Traversal function for dw2_forget_cached_source_info. */
3393 dw2_free_cached_file_names (void **slot
, void *info
)
3395 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3397 if (file_data
->real_names
)
3401 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3403 xfree ((void*) file_data
->real_names
[i
]);
3404 file_data
->real_names
[i
] = NULL
;
3412 dw2_forget_cached_source_info (struct objfile
*objfile
)
3414 dw2_setup (objfile
);
3416 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3417 dw2_free_cached_file_names
, NULL
);
3420 /* Helper function for dw2_map_symtabs_matching_filename that expands
3421 the symtabs and calls the iterator. */
3424 dw2_map_expand_apply (struct objfile
*objfile
,
3425 struct dwarf2_per_cu_data
*per_cu
,
3426 const char *name
, const char *real_path
,
3427 int (*callback
) (struct symtab
*, void *),
3430 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3432 /* Don't visit already-expanded CUs. */
3433 if (per_cu
->v
.quick
->compunit_symtab
)
3436 /* This may expand more than one symtab, and we want to iterate over
3438 dw2_instantiate_symtab (per_cu
);
3440 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3441 objfile
->compunit_symtabs
, last_made
);
3444 /* Implementation of the map_symtabs_matching_filename method. */
3447 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3448 const char *real_path
,
3449 int (*callback
) (struct symtab
*, void *),
3453 const char *name_basename
= lbasename (name
);
3455 dw2_setup (objfile
);
3457 /* The rule is CUs specify all the files, including those used by
3458 any TU, so there's no need to scan TUs here. */
3460 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3463 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3464 struct quick_file_names
*file_data
;
3466 /* We only need to look at symtabs not already expanded. */
3467 if (per_cu
->v
.quick
->compunit_symtab
)
3470 file_data
= dw2_get_file_names (per_cu
);
3471 if (file_data
== NULL
)
3474 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3476 const char *this_name
= file_data
->file_names
[j
];
3477 const char *this_real_name
;
3479 if (compare_filenames_for_search (this_name
, name
))
3481 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3487 /* Before we invoke realpath, which can get expensive when many
3488 files are involved, do a quick comparison of the basenames. */
3489 if (! basenames_may_differ
3490 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3493 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3494 if (compare_filenames_for_search (this_real_name
, name
))
3496 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3502 if (real_path
!= NULL
)
3504 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3505 gdb_assert (IS_ABSOLUTE_PATH (name
));
3506 if (this_real_name
!= NULL
3507 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3509 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3521 /* Struct used to manage iterating over all CUs looking for a symbol. */
3523 struct dw2_symtab_iterator
3525 /* The internalized form of .gdb_index. */
3526 struct mapped_index
*index
;
3527 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3528 int want_specific_block
;
3529 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3530 Unused if !WANT_SPECIFIC_BLOCK. */
3532 /* The kind of symbol we're looking for. */
3534 /* The list of CUs from the index entry of the symbol,
3535 or NULL if not found. */
3537 /* The next element in VEC to look at. */
3539 /* The number of elements in VEC, or zero if there is no match. */
3541 /* Have we seen a global version of the symbol?
3542 If so we can ignore all further global instances.
3543 This is to work around gold/15646, inefficient gold-generated
3548 /* Initialize the index symtab iterator ITER.
3549 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3550 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3553 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3554 struct mapped_index
*index
,
3555 int want_specific_block
,
3560 iter
->index
= index
;
3561 iter
->want_specific_block
= want_specific_block
;
3562 iter
->block_index
= block_index
;
3563 iter
->domain
= domain
;
3565 iter
->global_seen
= 0;
3567 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3568 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3576 /* Return the next matching CU or NULL if there are no more. */
3578 static struct dwarf2_per_cu_data
*
3579 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3581 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3583 offset_type cu_index_and_attrs
=
3584 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3585 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3586 struct dwarf2_per_cu_data
*per_cu
;
3587 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3588 /* This value is only valid for index versions >= 7. */
3589 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3590 gdb_index_symbol_kind symbol_kind
=
3591 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3592 /* Only check the symbol attributes if they're present.
3593 Indices prior to version 7 don't record them,
3594 and indices >= 7 may elide them for certain symbols
3595 (gold does this). */
3597 (iter
->index
->version
>= 7
3598 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3600 /* Don't crash on bad data. */
3601 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3602 + dwarf2_per_objfile
->n_type_units
))
3604 complaint (&symfile_complaints
,
3605 _(".gdb_index entry has bad CU index"
3607 objfile_name (dwarf2_per_objfile
->objfile
));
3611 per_cu
= dw2_get_cutu (cu_index
);
3613 /* Skip if already read in. */
3614 if (per_cu
->v
.quick
->compunit_symtab
)
3617 /* Check static vs global. */
3620 if (iter
->want_specific_block
3621 && want_static
!= is_static
)
3623 /* Work around gold/15646. */
3624 if (!is_static
&& iter
->global_seen
)
3627 iter
->global_seen
= 1;
3630 /* Only check the symbol's kind if it has one. */
3633 switch (iter
->domain
)
3636 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3637 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3638 /* Some types are also in VAR_DOMAIN. */
3639 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3643 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3647 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3662 static struct compunit_symtab
*
3663 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3664 const char *name
, domain_enum domain
)
3666 struct compunit_symtab
*stab_best
= NULL
;
3667 struct mapped_index
*index
;
3669 dw2_setup (objfile
);
3671 index
= dwarf2_per_objfile
->index_table
;
3673 /* index is NULL if OBJF_READNOW. */
3676 struct dw2_symtab_iterator iter
;
3677 struct dwarf2_per_cu_data
*per_cu
;
3679 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3681 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3683 struct symbol
*sym
, *with_opaque
= NULL
;
3684 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3685 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3686 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3688 sym
= block_find_symbol (block
, name
, domain
,
3689 block_find_non_opaque_type_preferred
,
3692 /* Some caution must be observed with overloaded functions
3693 and methods, since the index will not contain any overload
3694 information (but NAME might contain it). */
3697 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3699 if (with_opaque
!= NULL
3700 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
3703 /* Keep looking through other CUs. */
3711 dw2_print_stats (struct objfile
*objfile
)
3713 int i
, total
, count
;
3715 dw2_setup (objfile
);
3716 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3718 for (i
= 0; i
< total
; ++i
)
3720 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3722 if (!per_cu
->v
.quick
->compunit_symtab
)
3725 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3726 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3729 /* This dumps minimal information about the index.
3730 It is called via "mt print objfiles".
3731 One use is to verify .gdb_index has been loaded by the
3732 gdb.dwarf2/gdb-index.exp testcase. */
3735 dw2_dump (struct objfile
*objfile
)
3737 dw2_setup (objfile
);
3738 gdb_assert (dwarf2_per_objfile
->using_index
);
3739 printf_filtered (".gdb_index:");
3740 if (dwarf2_per_objfile
->index_table
!= NULL
)
3742 printf_filtered (" version %d\n",
3743 dwarf2_per_objfile
->index_table
->version
);
3746 printf_filtered (" faked for \"readnow\"\n");
3747 printf_filtered ("\n");
3751 dw2_relocate (struct objfile
*objfile
,
3752 const struct section_offsets
*new_offsets
,
3753 const struct section_offsets
*delta
)
3755 /* There's nothing to relocate here. */
3759 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3760 const char *func_name
)
3762 struct mapped_index
*index
;
3764 dw2_setup (objfile
);
3766 index
= dwarf2_per_objfile
->index_table
;
3768 /* index is NULL if OBJF_READNOW. */
3771 struct dw2_symtab_iterator iter
;
3772 struct dwarf2_per_cu_data
*per_cu
;
3774 /* Note: It doesn't matter what we pass for block_index here. */
3775 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3778 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3779 dw2_instantiate_symtab (per_cu
);
3784 dw2_expand_all_symtabs (struct objfile
*objfile
)
3788 dw2_setup (objfile
);
3790 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3791 + dwarf2_per_objfile
->n_type_units
); ++i
)
3793 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3795 dw2_instantiate_symtab (per_cu
);
3800 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3801 const char *fullname
)
3805 dw2_setup (objfile
);
3807 /* We don't need to consider type units here.
3808 This is only called for examining code, e.g. expand_line_sal.
3809 There can be an order of magnitude (or more) more type units
3810 than comp units, and we avoid them if we can. */
3812 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3815 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3816 struct quick_file_names
*file_data
;
3818 /* We only need to look at symtabs not already expanded. */
3819 if (per_cu
->v
.quick
->compunit_symtab
)
3822 file_data
= dw2_get_file_names (per_cu
);
3823 if (file_data
== NULL
)
3826 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3828 const char *this_fullname
= file_data
->file_names
[j
];
3830 if (filename_cmp (this_fullname
, fullname
) == 0)
3832 dw2_instantiate_symtab (per_cu
);
3840 dw2_map_matching_symbols (struct objfile
*objfile
,
3841 const char * name
, domain_enum domain
,
3843 int (*callback
) (struct block
*,
3844 struct symbol
*, void *),
3845 void *data
, symbol_compare_ftype
*match
,
3846 symbol_compare_ftype
*ordered_compare
)
3848 /* Currently unimplemented; used for Ada. The function can be called if the
3849 current language is Ada for a non-Ada objfile using GNU index. As Ada
3850 does not look for non-Ada symbols this function should just return. */
3854 dw2_expand_symtabs_matching
3855 (struct objfile
*objfile
,
3856 expand_symtabs_file_matcher_ftype
*file_matcher
,
3857 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3858 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3859 enum search_domain kind
,
3864 struct mapped_index
*index
;
3866 dw2_setup (objfile
);
3868 /* index_table is NULL if OBJF_READNOW. */
3869 if (!dwarf2_per_objfile
->index_table
)
3871 index
= dwarf2_per_objfile
->index_table
;
3873 if (file_matcher
!= NULL
)
3875 struct cleanup
*cleanup
;
3876 htab_t visited_found
, visited_not_found
;
3878 visited_found
= htab_create_alloc (10,
3879 htab_hash_pointer
, htab_eq_pointer
,
3880 NULL
, xcalloc
, xfree
);
3881 cleanup
= make_cleanup_htab_delete (visited_found
);
3882 visited_not_found
= htab_create_alloc (10,
3883 htab_hash_pointer
, htab_eq_pointer
,
3884 NULL
, xcalloc
, xfree
);
3885 make_cleanup_htab_delete (visited_not_found
);
3887 /* The rule is CUs specify all the files, including those used by
3888 any TU, so there's no need to scan TUs here. */
3890 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3893 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3894 struct quick_file_names
*file_data
;
3899 per_cu
->v
.quick
->mark
= 0;
3901 /* We only need to look at symtabs not already expanded. */
3902 if (per_cu
->v
.quick
->compunit_symtab
)
3905 file_data
= dw2_get_file_names (per_cu
);
3906 if (file_data
== NULL
)
3909 if (htab_find (visited_not_found
, file_data
) != NULL
)
3911 else if (htab_find (visited_found
, file_data
) != NULL
)
3913 per_cu
->v
.quick
->mark
= 1;
3917 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3919 const char *this_real_name
;
3921 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3923 per_cu
->v
.quick
->mark
= 1;
3927 /* Before we invoke realpath, which can get expensive when many
3928 files are involved, do a quick comparison of the basenames. */
3929 if (!basenames_may_differ
3930 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3934 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3935 if (file_matcher (this_real_name
, data
, 0))
3937 per_cu
->v
.quick
->mark
= 1;
3942 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3944 : visited_not_found
,
3949 do_cleanups (cleanup
);
3952 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3954 offset_type idx
= 2 * iter
;
3956 offset_type
*vec
, vec_len
, vec_idx
;
3957 int global_seen
= 0;
3961 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3964 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3966 if (! (*symbol_matcher
) (name
, data
))
3969 /* The name was matched, now expand corresponding CUs that were
3971 vec
= (offset_type
*) (index
->constant_pool
3972 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3973 vec_len
= MAYBE_SWAP (vec
[0]);
3974 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3976 struct dwarf2_per_cu_data
*per_cu
;
3977 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3978 /* This value is only valid for index versions >= 7. */
3979 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3980 gdb_index_symbol_kind symbol_kind
=
3981 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3982 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3983 /* Only check the symbol attributes if they're present.
3984 Indices prior to version 7 don't record them,
3985 and indices >= 7 may elide them for certain symbols
3986 (gold does this). */
3988 (index
->version
>= 7
3989 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3991 /* Work around gold/15646. */
3994 if (!is_static
&& global_seen
)
4000 /* Only check the symbol's kind if it has one. */
4005 case VARIABLES_DOMAIN
:
4006 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4009 case FUNCTIONS_DOMAIN
:
4010 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4014 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4022 /* Don't crash on bad data. */
4023 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4024 + dwarf2_per_objfile
->n_type_units
))
4026 complaint (&symfile_complaints
,
4027 _(".gdb_index entry has bad CU index"
4028 " [in module %s]"), objfile_name (objfile
));
4032 per_cu
= dw2_get_cutu (cu_index
);
4033 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4035 int symtab_was_null
=
4036 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4038 dw2_instantiate_symtab (per_cu
);
4040 if (expansion_notify
!= NULL
4042 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4044 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4052 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4055 static struct compunit_symtab
*
4056 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4061 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4062 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4065 if (cust
->includes
== NULL
)
4068 for (i
= 0; cust
->includes
[i
]; ++i
)
4070 struct compunit_symtab
*s
= cust
->includes
[i
];
4072 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4080 static struct compunit_symtab
*
4081 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4082 struct bound_minimal_symbol msymbol
,
4084 struct obj_section
*section
,
4087 struct dwarf2_per_cu_data
*data
;
4088 struct compunit_symtab
*result
;
4090 dw2_setup (objfile
);
4092 if (!objfile
->psymtabs_addrmap
)
4095 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
4099 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4100 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4101 paddress (get_objfile_arch (objfile
), pc
));
4104 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4106 gdb_assert (result
!= NULL
);
4111 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4112 void *data
, int need_fullname
)
4115 struct cleanup
*cleanup
;
4116 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4117 NULL
, xcalloc
, xfree
);
4119 cleanup
= make_cleanup_htab_delete (visited
);
4120 dw2_setup (objfile
);
4122 /* The rule is CUs specify all the files, including those used by
4123 any TU, so there's no need to scan TUs here.
4124 We can ignore file names coming from already-expanded CUs. */
4126 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4128 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4130 if (per_cu
->v
.quick
->compunit_symtab
)
4132 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4135 *slot
= per_cu
->v
.quick
->file_names
;
4139 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4142 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4143 struct quick_file_names
*file_data
;
4146 /* We only need to look at symtabs not already expanded. */
4147 if (per_cu
->v
.quick
->compunit_symtab
)
4150 file_data
= dw2_get_file_names (per_cu
);
4151 if (file_data
== NULL
)
4154 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4157 /* Already visited. */
4162 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4164 const char *this_real_name
;
4167 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4169 this_real_name
= NULL
;
4170 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4174 do_cleanups (cleanup
);
4178 dw2_has_symbols (struct objfile
*objfile
)
4183 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4186 dw2_find_last_source_symtab
,
4187 dw2_forget_cached_source_info
,
4188 dw2_map_symtabs_matching_filename
,
4193 dw2_expand_symtabs_for_function
,
4194 dw2_expand_all_symtabs
,
4195 dw2_expand_symtabs_with_fullname
,
4196 dw2_map_matching_symbols
,
4197 dw2_expand_symtabs_matching
,
4198 dw2_find_pc_sect_compunit_symtab
,
4199 dw2_map_symbol_filenames
4202 /* Initialize for reading DWARF for this objfile. Return 0 if this
4203 file will use psymtabs, or 1 if using the GNU index. */
4206 dwarf2_initialize_objfile (struct objfile
*objfile
)
4208 /* If we're about to read full symbols, don't bother with the
4209 indices. In this case we also don't care if some other debug
4210 format is making psymtabs, because they are all about to be
4212 if ((objfile
->flags
& OBJF_READNOW
))
4216 dwarf2_per_objfile
->using_index
= 1;
4217 create_all_comp_units (objfile
);
4218 create_all_type_units (objfile
);
4219 dwarf2_per_objfile
->quick_file_names_table
=
4220 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4222 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4223 + dwarf2_per_objfile
->n_type_units
); ++i
)
4225 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4227 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4228 struct dwarf2_per_cu_quick_data
);
4231 /* Return 1 so that gdb sees the "quick" functions. However,
4232 these functions will be no-ops because we will have expanded
4237 if (dwarf2_read_index (objfile
))
4245 /* Build a partial symbol table. */
4248 dwarf2_build_psymtabs (struct objfile
*objfile
)
4251 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4253 init_psymbol_list (objfile
, 1024);
4258 /* This isn't really ideal: all the data we allocate on the
4259 objfile's obstack is still uselessly kept around. However,
4260 freeing it seems unsafe. */
4261 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4263 dwarf2_build_psymtabs_hard (objfile
);
4264 discard_cleanups (cleanups
);
4266 CATCH (except
, RETURN_MASK_ERROR
)
4268 exception_print (gdb_stderr
, except
);
4273 /* Return the total length of the CU described by HEADER. */
4276 get_cu_length (const struct comp_unit_head
*header
)
4278 return header
->initial_length_size
+ header
->length
;
4281 /* Return TRUE if OFFSET is within CU_HEADER. */
4284 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4286 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4287 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4289 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4292 /* Find the base address of the compilation unit for range lists and
4293 location lists. It will normally be specified by DW_AT_low_pc.
4294 In DWARF-3 draft 4, the base address could be overridden by
4295 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4296 compilation units with discontinuous ranges. */
4299 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4301 struct attribute
*attr
;
4304 cu
->base_address
= 0;
4306 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4309 cu
->base_address
= attr_value_as_address (attr
);
4314 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4317 cu
->base_address
= attr_value_as_address (attr
);
4323 /* Read in the comp unit header information from the debug_info at info_ptr.
4324 NOTE: This leaves members offset, first_die_offset to be filled in
4327 static const gdb_byte
*
4328 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4329 const gdb_byte
*info_ptr
, bfd
*abfd
)
4332 unsigned int bytes_read
;
4334 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4335 cu_header
->initial_length_size
= bytes_read
;
4336 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4337 info_ptr
+= bytes_read
;
4338 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4340 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4342 info_ptr
+= bytes_read
;
4343 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4345 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4346 if (signed_addr
< 0)
4347 internal_error (__FILE__
, __LINE__
,
4348 _("read_comp_unit_head: dwarf from non elf file"));
4349 cu_header
->signed_addr_p
= signed_addr
;
4354 /* Helper function that returns the proper abbrev section for
4357 static struct dwarf2_section_info
*
4358 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4360 struct dwarf2_section_info
*abbrev
;
4362 if (this_cu
->is_dwz
)
4363 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4365 abbrev
= &dwarf2_per_objfile
->abbrev
;
4370 /* Subroutine of read_and_check_comp_unit_head and
4371 read_and_check_type_unit_head to simplify them.
4372 Perform various error checking on the header. */
4375 error_check_comp_unit_head (struct comp_unit_head
*header
,
4376 struct dwarf2_section_info
*section
,
4377 struct dwarf2_section_info
*abbrev_section
)
4379 bfd
*abfd
= get_section_bfd_owner (section
);
4380 const char *filename
= get_section_file_name (section
);
4382 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4383 error (_("Dwarf Error: wrong version in compilation unit header "
4384 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4387 if (header
->abbrev_offset
.sect_off
4388 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4389 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4390 "(offset 0x%lx + 6) [in module %s]"),
4391 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4394 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4395 avoid potential 32-bit overflow. */
4396 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4398 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4399 "(offset 0x%lx + 0) [in module %s]"),
4400 (long) header
->length
, (long) header
->offset
.sect_off
,
4404 /* Read in a CU/TU header and perform some basic error checking.
4405 The contents of the header are stored in HEADER.
4406 The result is a pointer to the start of the first DIE. */
4408 static const gdb_byte
*
4409 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4410 struct dwarf2_section_info
*section
,
4411 struct dwarf2_section_info
*abbrev_section
,
4412 const gdb_byte
*info_ptr
,
4413 int is_debug_types_section
)
4415 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4416 bfd
*abfd
= get_section_bfd_owner (section
);
4418 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4420 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4422 /* If we're reading a type unit, skip over the signature and
4423 type_offset fields. */
4424 if (is_debug_types_section
)
4425 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4427 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4429 error_check_comp_unit_head (header
, section
, abbrev_section
);
4434 /* Read in the types comp unit header information from .debug_types entry at
4435 types_ptr. The result is a pointer to one past the end of the header. */
4437 static const gdb_byte
*
4438 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4439 struct dwarf2_section_info
*section
,
4440 struct dwarf2_section_info
*abbrev_section
,
4441 const gdb_byte
*info_ptr
,
4442 ULONGEST
*signature
,
4443 cu_offset
*type_offset_in_tu
)
4445 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4446 bfd
*abfd
= get_section_bfd_owner (section
);
4448 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4450 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4452 /* If we're reading a type unit, skip over the signature and
4453 type_offset fields. */
4454 if (signature
!= NULL
)
4455 *signature
= read_8_bytes (abfd
, info_ptr
);
4457 if (type_offset_in_tu
!= NULL
)
4458 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4459 header
->offset_size
);
4460 info_ptr
+= header
->offset_size
;
4462 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4464 error_check_comp_unit_head (header
, section
, abbrev_section
);
4469 /* Fetch the abbreviation table offset from a comp or type unit header. */
4472 read_abbrev_offset (struct dwarf2_section_info
*section
,
4475 bfd
*abfd
= get_section_bfd_owner (section
);
4476 const gdb_byte
*info_ptr
;
4477 unsigned int length
, initial_length_size
, offset_size
;
4478 sect_offset abbrev_offset
;
4480 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4481 info_ptr
= section
->buffer
+ offset
.sect_off
;
4482 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4483 offset_size
= initial_length_size
== 4 ? 4 : 8;
4484 info_ptr
+= initial_length_size
+ 2 /*version*/;
4485 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4486 return abbrev_offset
;
4489 /* Allocate a new partial symtab for file named NAME and mark this new
4490 partial symtab as being an include of PST. */
4493 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4494 struct objfile
*objfile
)
4496 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4498 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4500 /* It shares objfile->objfile_obstack. */
4501 subpst
->dirname
= pst
->dirname
;
4504 subpst
->textlow
= 0;
4505 subpst
->texthigh
= 0;
4507 subpst
->dependencies
4508 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4509 subpst
->dependencies
[0] = pst
;
4510 subpst
->number_of_dependencies
= 1;
4512 subpst
->globals_offset
= 0;
4513 subpst
->n_global_syms
= 0;
4514 subpst
->statics_offset
= 0;
4515 subpst
->n_static_syms
= 0;
4516 subpst
->compunit_symtab
= NULL
;
4517 subpst
->read_symtab
= pst
->read_symtab
;
4520 /* No private part is necessary for include psymtabs. This property
4521 can be used to differentiate between such include psymtabs and
4522 the regular ones. */
4523 subpst
->read_symtab_private
= NULL
;
4526 /* Read the Line Number Program data and extract the list of files
4527 included by the source file represented by PST. Build an include
4528 partial symtab for each of these included files. */
4531 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4532 struct die_info
*die
,
4533 struct partial_symtab
*pst
)
4535 struct line_header
*lh
= NULL
;
4536 struct attribute
*attr
;
4538 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4540 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4542 return; /* No linetable, so no includes. */
4544 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4545 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4547 free_line_header (lh
);
4551 hash_signatured_type (const void *item
)
4553 const struct signatured_type
*sig_type
= item
;
4555 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4556 return sig_type
->signature
;
4560 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4562 const struct signatured_type
*lhs
= item_lhs
;
4563 const struct signatured_type
*rhs
= item_rhs
;
4565 return lhs
->signature
== rhs
->signature
;
4568 /* Allocate a hash table for signatured types. */
4571 allocate_signatured_type_table (struct objfile
*objfile
)
4573 return htab_create_alloc_ex (41,
4574 hash_signatured_type
,
4577 &objfile
->objfile_obstack
,
4578 hashtab_obstack_allocate
,
4579 dummy_obstack_deallocate
);
4582 /* A helper function to add a signatured type CU to a table. */
4585 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4587 struct signatured_type
*sigt
= *slot
;
4588 struct signatured_type
***datap
= datum
;
4596 /* Create the hash table of all entries in the .debug_types
4597 (or .debug_types.dwo) section(s).
4598 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4599 otherwise it is NULL.
4601 The result is a pointer to the hash table or NULL if there are no types.
4603 Note: This function processes DWO files only, not DWP files. */
4606 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4607 VEC (dwarf2_section_info_def
) *types
)
4609 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4610 htab_t types_htab
= NULL
;
4612 struct dwarf2_section_info
*section
;
4613 struct dwarf2_section_info
*abbrev_section
;
4615 if (VEC_empty (dwarf2_section_info_def
, types
))
4618 abbrev_section
= (dwo_file
!= NULL
4619 ? &dwo_file
->sections
.abbrev
4620 : &dwarf2_per_objfile
->abbrev
);
4622 if (dwarf_read_debug
)
4623 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4624 dwo_file
? ".dwo" : "",
4625 get_section_file_name (abbrev_section
));
4628 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4632 const gdb_byte
*info_ptr
, *end_ptr
;
4634 dwarf2_read_section (objfile
, section
);
4635 info_ptr
= section
->buffer
;
4637 if (info_ptr
== NULL
)
4640 /* We can't set abfd until now because the section may be empty or
4641 not present, in which case the bfd is unknown. */
4642 abfd
= get_section_bfd_owner (section
);
4644 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4645 because we don't need to read any dies: the signature is in the
4648 end_ptr
= info_ptr
+ section
->size
;
4649 while (info_ptr
< end_ptr
)
4652 cu_offset type_offset_in_tu
;
4654 struct signatured_type
*sig_type
;
4655 struct dwo_unit
*dwo_tu
;
4657 const gdb_byte
*ptr
= info_ptr
;
4658 struct comp_unit_head header
;
4659 unsigned int length
;
4661 offset
.sect_off
= ptr
- section
->buffer
;
4663 /* We need to read the type's signature in order to build the hash
4664 table, but we don't need anything else just yet. */
4666 ptr
= read_and_check_type_unit_head (&header
, section
,
4667 abbrev_section
, ptr
,
4668 &signature
, &type_offset_in_tu
);
4670 length
= get_cu_length (&header
);
4672 /* Skip dummy type units. */
4673 if (ptr
>= info_ptr
+ length
4674 || peek_abbrev_code (abfd
, ptr
) == 0)
4680 if (types_htab
== NULL
)
4683 types_htab
= allocate_dwo_unit_table (objfile
);
4685 types_htab
= allocate_signatured_type_table (objfile
);
4691 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4693 dwo_tu
->dwo_file
= dwo_file
;
4694 dwo_tu
->signature
= signature
;
4695 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4696 dwo_tu
->section
= section
;
4697 dwo_tu
->offset
= offset
;
4698 dwo_tu
->length
= length
;
4702 /* N.B.: type_offset is not usable if this type uses a DWO file.
4703 The real type_offset is in the DWO file. */
4705 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4706 struct signatured_type
);
4707 sig_type
->signature
= signature
;
4708 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4709 sig_type
->per_cu
.objfile
= objfile
;
4710 sig_type
->per_cu
.is_debug_types
= 1;
4711 sig_type
->per_cu
.section
= section
;
4712 sig_type
->per_cu
.offset
= offset
;
4713 sig_type
->per_cu
.length
= length
;
4716 slot
= htab_find_slot (types_htab
,
4717 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4719 gdb_assert (slot
!= NULL
);
4722 sect_offset dup_offset
;
4726 const struct dwo_unit
*dup_tu
= *slot
;
4728 dup_offset
= dup_tu
->offset
;
4732 const struct signatured_type
*dup_tu
= *slot
;
4734 dup_offset
= dup_tu
->per_cu
.offset
;
4737 complaint (&symfile_complaints
,
4738 _("debug type entry at offset 0x%x is duplicate to"
4739 " the entry at offset 0x%x, signature %s"),
4740 offset
.sect_off
, dup_offset
.sect_off
,
4741 hex_string (signature
));
4743 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4745 if (dwarf_read_debug
> 1)
4746 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4748 hex_string (signature
));
4757 /* Create the hash table of all entries in the .debug_types section,
4758 and initialize all_type_units.
4759 The result is zero if there is an error (e.g. missing .debug_types section),
4760 otherwise non-zero. */
4763 create_all_type_units (struct objfile
*objfile
)
4766 struct signatured_type
**iter
;
4768 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4769 if (types_htab
== NULL
)
4771 dwarf2_per_objfile
->signatured_types
= NULL
;
4775 dwarf2_per_objfile
->signatured_types
= types_htab
;
4777 dwarf2_per_objfile
->n_type_units
4778 = dwarf2_per_objfile
->n_allocated_type_units
4779 = htab_elements (types_htab
);
4780 dwarf2_per_objfile
->all_type_units
=
4781 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
4782 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4783 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4784 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4785 == dwarf2_per_objfile
->n_type_units
);
4790 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4791 If SLOT is non-NULL, it is the entry to use in the hash table.
4792 Otherwise we find one. */
4794 static struct signatured_type
*
4795 add_type_unit (ULONGEST sig
, void **slot
)
4797 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4798 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4799 struct signatured_type
*sig_type
;
4801 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4803 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4805 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4806 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4807 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4808 dwarf2_per_objfile
->all_type_units
4809 = XRESIZEVEC (struct signatured_type
*,
4810 dwarf2_per_objfile
->all_type_units
,
4811 dwarf2_per_objfile
->n_allocated_type_units
);
4812 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4814 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4816 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4817 struct signatured_type
);
4818 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4819 sig_type
->signature
= sig
;
4820 sig_type
->per_cu
.is_debug_types
= 1;
4821 if (dwarf2_per_objfile
->using_index
)
4823 sig_type
->per_cu
.v
.quick
=
4824 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4825 struct dwarf2_per_cu_quick_data
);
4830 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4833 gdb_assert (*slot
== NULL
);
4835 /* The rest of sig_type must be filled in by the caller. */
4839 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4840 Fill in SIG_ENTRY with DWO_ENTRY. */
4843 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4844 struct signatured_type
*sig_entry
,
4845 struct dwo_unit
*dwo_entry
)
4847 /* Make sure we're not clobbering something we don't expect to. */
4848 gdb_assert (! sig_entry
->per_cu
.queued
);
4849 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4850 if (dwarf2_per_objfile
->using_index
)
4852 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4853 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4856 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4857 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4858 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4859 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4860 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4862 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4863 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4864 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4865 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4866 sig_entry
->per_cu
.objfile
= objfile
;
4867 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4868 sig_entry
->dwo_unit
= dwo_entry
;
4871 /* Subroutine of lookup_signatured_type.
4872 If we haven't read the TU yet, create the signatured_type data structure
4873 for a TU to be read in directly from a DWO file, bypassing the stub.
4874 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4875 using .gdb_index, then when reading a CU we want to stay in the DWO file
4876 containing that CU. Otherwise we could end up reading several other DWO
4877 files (due to comdat folding) to process the transitive closure of all the
4878 mentioned TUs, and that can be slow. The current DWO file will have every
4879 type signature that it needs.
4880 We only do this for .gdb_index because in the psymtab case we already have
4881 to read all the DWOs to build the type unit groups. */
4883 static struct signatured_type
*
4884 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4886 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4887 struct dwo_file
*dwo_file
;
4888 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4889 struct signatured_type find_sig_entry
, *sig_entry
;
4892 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4894 /* If TU skeletons have been removed then we may not have read in any
4896 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4898 dwarf2_per_objfile
->signatured_types
4899 = allocate_signatured_type_table (objfile
);
4902 /* We only ever need to read in one copy of a signatured type.
4903 Use the global signatured_types array to do our own comdat-folding
4904 of types. If this is the first time we're reading this TU, and
4905 the TU has an entry in .gdb_index, replace the recorded data from
4906 .gdb_index with this TU. */
4908 find_sig_entry
.signature
= sig
;
4909 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4910 &find_sig_entry
, INSERT
);
4913 /* We can get here with the TU already read, *or* in the process of being
4914 read. Don't reassign the global entry to point to this DWO if that's
4915 the case. Also note that if the TU is already being read, it may not
4916 have come from a DWO, the program may be a mix of Fission-compiled
4917 code and non-Fission-compiled code. */
4919 /* Have we already tried to read this TU?
4920 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4921 needn't exist in the global table yet). */
4922 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4925 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4926 dwo_unit of the TU itself. */
4927 dwo_file
= cu
->dwo_unit
->dwo_file
;
4929 /* Ok, this is the first time we're reading this TU. */
4930 if (dwo_file
->tus
== NULL
)
4932 find_dwo_entry
.signature
= sig
;
4933 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4934 if (dwo_entry
== NULL
)
4937 /* If the global table doesn't have an entry for this TU, add one. */
4938 if (sig_entry
== NULL
)
4939 sig_entry
= add_type_unit (sig
, slot
);
4941 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4942 sig_entry
->per_cu
.tu_read
= 1;
4946 /* Subroutine of lookup_signatured_type.
4947 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4948 then try the DWP file. If the TU stub (skeleton) has been removed then
4949 it won't be in .gdb_index. */
4951 static struct signatured_type
*
4952 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4954 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4955 struct dwp_file
*dwp_file
= get_dwp_file ();
4956 struct dwo_unit
*dwo_entry
;
4957 struct signatured_type find_sig_entry
, *sig_entry
;
4960 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4961 gdb_assert (dwp_file
!= NULL
);
4963 /* If TU skeletons have been removed then we may not have read in any
4965 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4967 dwarf2_per_objfile
->signatured_types
4968 = allocate_signatured_type_table (objfile
);
4971 find_sig_entry
.signature
= sig
;
4972 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4973 &find_sig_entry
, INSERT
);
4976 /* Have we already tried to read this TU?
4977 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4978 needn't exist in the global table yet). */
4979 if (sig_entry
!= NULL
)
4982 if (dwp_file
->tus
== NULL
)
4984 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4985 sig
, 1 /* is_debug_types */);
4986 if (dwo_entry
== NULL
)
4989 sig_entry
= add_type_unit (sig
, slot
);
4990 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4995 /* Lookup a signature based type for DW_FORM_ref_sig8.
4996 Returns NULL if signature SIG is not present in the table.
4997 It is up to the caller to complain about this. */
4999 static struct signatured_type
*
5000 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5003 && dwarf2_per_objfile
->using_index
)
5005 /* We're in a DWO/DWP file, and we're using .gdb_index.
5006 These cases require special processing. */
5007 if (get_dwp_file () == NULL
)
5008 return lookup_dwo_signatured_type (cu
, sig
);
5010 return lookup_dwp_signatured_type (cu
, sig
);
5014 struct signatured_type find_entry
, *entry
;
5016 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5018 find_entry
.signature
= sig
;
5019 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
5024 /* Low level DIE reading support. */
5026 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5029 init_cu_die_reader (struct die_reader_specs
*reader
,
5030 struct dwarf2_cu
*cu
,
5031 struct dwarf2_section_info
*section
,
5032 struct dwo_file
*dwo_file
)
5034 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5035 reader
->abfd
= get_section_bfd_owner (section
);
5037 reader
->dwo_file
= dwo_file
;
5038 reader
->die_section
= section
;
5039 reader
->buffer
= section
->buffer
;
5040 reader
->buffer_end
= section
->buffer
+ section
->size
;
5041 reader
->comp_dir
= NULL
;
5044 /* Subroutine of init_cutu_and_read_dies to simplify it.
5045 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5046 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5049 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5050 from it to the DIE in the DWO. If NULL we are skipping the stub.
5051 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5052 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5053 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5054 STUB_COMP_DIR may be non-NULL.
5055 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5056 are filled in with the info of the DIE from the DWO file.
5057 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5058 provided an abbrev table to use.
5059 The result is non-zero if a valid (non-dummy) DIE was found. */
5062 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5063 struct dwo_unit
*dwo_unit
,
5064 int abbrev_table_provided
,
5065 struct die_info
*stub_comp_unit_die
,
5066 const char *stub_comp_dir
,
5067 struct die_reader_specs
*result_reader
,
5068 const gdb_byte
**result_info_ptr
,
5069 struct die_info
**result_comp_unit_die
,
5070 int *result_has_children
)
5072 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5073 struct dwarf2_cu
*cu
= this_cu
->cu
;
5074 struct dwarf2_section_info
*section
;
5076 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5077 ULONGEST signature
; /* Or dwo_id. */
5078 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5079 int i
,num_extra_attrs
;
5080 struct dwarf2_section_info
*dwo_abbrev_section
;
5081 struct attribute
*attr
;
5082 struct die_info
*comp_unit_die
;
5084 /* At most one of these may be provided. */
5085 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5087 /* These attributes aren't processed until later:
5088 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5089 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5090 referenced later. However, these attributes are found in the stub
5091 which we won't have later. In order to not impose this complication
5092 on the rest of the code, we read them here and copy them to the
5101 if (stub_comp_unit_die
!= NULL
)
5103 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5105 if (! this_cu
->is_debug_types
)
5106 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5107 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5108 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5109 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5110 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5112 /* There should be a DW_AT_addr_base attribute here (if needed).
5113 We need the value before we can process DW_FORM_GNU_addr_index. */
5115 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5117 cu
->addr_base
= DW_UNSND (attr
);
5119 /* There should be a DW_AT_ranges_base attribute here (if needed).
5120 We need the value before we can process DW_AT_ranges. */
5121 cu
->ranges_base
= 0;
5122 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5124 cu
->ranges_base
= DW_UNSND (attr
);
5126 else if (stub_comp_dir
!= NULL
)
5128 /* Reconstruct the comp_dir attribute to simplify the code below. */
5129 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5130 comp_dir
->name
= DW_AT_comp_dir
;
5131 comp_dir
->form
= DW_FORM_string
;
5132 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5133 DW_STRING (comp_dir
) = stub_comp_dir
;
5136 /* Set up for reading the DWO CU/TU. */
5137 cu
->dwo_unit
= dwo_unit
;
5138 section
= dwo_unit
->section
;
5139 dwarf2_read_section (objfile
, section
);
5140 abfd
= get_section_bfd_owner (section
);
5141 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5142 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5143 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5145 if (this_cu
->is_debug_types
)
5147 ULONGEST header_signature
;
5148 cu_offset type_offset_in_tu
;
5149 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5151 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5155 &type_offset_in_tu
);
5156 /* This is not an assert because it can be caused by bad debug info. */
5157 if (sig_type
->signature
!= header_signature
)
5159 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5160 " TU at offset 0x%x [in module %s]"),
5161 hex_string (sig_type
->signature
),
5162 hex_string (header_signature
),
5163 dwo_unit
->offset
.sect_off
,
5164 bfd_get_filename (abfd
));
5166 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5167 /* For DWOs coming from DWP files, we don't know the CU length
5168 nor the type's offset in the TU until now. */
5169 dwo_unit
->length
= get_cu_length (&cu
->header
);
5170 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5172 /* Establish the type offset that can be used to lookup the type.
5173 For DWO files, we don't know it until now. */
5174 sig_type
->type_offset_in_section
.sect_off
=
5175 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5179 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5182 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5183 /* For DWOs coming from DWP files, we don't know the CU length
5185 dwo_unit
->length
= get_cu_length (&cu
->header
);
5188 /* Replace the CU's original abbrev table with the DWO's.
5189 Reminder: We can't read the abbrev table until we've read the header. */
5190 if (abbrev_table_provided
)
5192 /* Don't free the provided abbrev table, the caller of
5193 init_cutu_and_read_dies owns it. */
5194 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5195 /* Ensure the DWO abbrev table gets freed. */
5196 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5200 dwarf2_free_abbrev_table (cu
);
5201 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5202 /* Leave any existing abbrev table cleanup as is. */
5205 /* Read in the die, but leave space to copy over the attributes
5206 from the stub. This has the benefit of simplifying the rest of
5207 the code - all the work to maintain the illusion of a single
5208 DW_TAG_{compile,type}_unit DIE is done here. */
5209 num_extra_attrs
= ((stmt_list
!= NULL
)
5213 + (comp_dir
!= NULL
));
5214 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5215 result_has_children
, num_extra_attrs
);
5217 /* Copy over the attributes from the stub to the DIE we just read in. */
5218 comp_unit_die
= *result_comp_unit_die
;
5219 i
= comp_unit_die
->num_attrs
;
5220 if (stmt_list
!= NULL
)
5221 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5223 comp_unit_die
->attrs
[i
++] = *low_pc
;
5224 if (high_pc
!= NULL
)
5225 comp_unit_die
->attrs
[i
++] = *high_pc
;
5227 comp_unit_die
->attrs
[i
++] = *ranges
;
5228 if (comp_dir
!= NULL
)
5229 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5230 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5232 if (dwarf_die_debug
)
5234 fprintf_unfiltered (gdb_stdlog
,
5235 "Read die from %s@0x%x of %s:\n",
5236 get_section_name (section
),
5237 (unsigned) (begin_info_ptr
- section
->buffer
),
5238 bfd_get_filename (abfd
));
5239 dump_die (comp_unit_die
, dwarf_die_debug
);
5242 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5243 TUs by skipping the stub and going directly to the entry in the DWO file.
5244 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5245 to get it via circuitous means. Blech. */
5246 if (comp_dir
!= NULL
)
5247 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5249 /* Skip dummy compilation units. */
5250 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5251 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5254 *result_info_ptr
= info_ptr
;
5258 /* Subroutine of init_cutu_and_read_dies to simplify it.
5259 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5260 Returns NULL if the specified DWO unit cannot be found. */
5262 static struct dwo_unit
*
5263 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5264 struct die_info
*comp_unit_die
)
5266 struct dwarf2_cu
*cu
= this_cu
->cu
;
5267 struct attribute
*attr
;
5269 struct dwo_unit
*dwo_unit
;
5270 const char *comp_dir
, *dwo_name
;
5272 gdb_assert (cu
!= NULL
);
5274 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5275 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5276 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5278 if (this_cu
->is_debug_types
)
5280 struct signatured_type
*sig_type
;
5282 /* Since this_cu is the first member of struct signatured_type,
5283 we can go from a pointer to one to a pointer to the other. */
5284 sig_type
= (struct signatured_type
*) this_cu
;
5285 signature
= sig_type
->signature
;
5286 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5290 struct attribute
*attr
;
5292 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5294 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5296 dwo_name
, objfile_name (this_cu
->objfile
));
5297 signature
= DW_UNSND (attr
);
5298 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5305 /* Subroutine of init_cutu_and_read_dies to simplify it.
5306 See it for a description of the parameters.
5307 Read a TU directly from a DWO file, bypassing the stub.
5309 Note: This function could be a little bit simpler if we shared cleanups
5310 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5311 to do, so we keep this function self-contained. Or we could move this
5312 into our caller, but it's complex enough already. */
5315 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5316 int use_existing_cu
, int keep
,
5317 die_reader_func_ftype
*die_reader_func
,
5320 struct dwarf2_cu
*cu
;
5321 struct signatured_type
*sig_type
;
5322 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5323 struct die_reader_specs reader
;
5324 const gdb_byte
*info_ptr
;
5325 struct die_info
*comp_unit_die
;
5328 /* Verify we can do the following downcast, and that we have the
5330 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5331 sig_type
= (struct signatured_type
*) this_cu
;
5332 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5334 cleanups
= make_cleanup (null_cleanup
, NULL
);
5336 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5338 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5340 /* There's no need to do the rereading_dwo_cu handling that
5341 init_cutu_and_read_dies does since we don't read the stub. */
5345 /* If !use_existing_cu, this_cu->cu must be NULL. */
5346 gdb_assert (this_cu
->cu
== NULL
);
5347 cu
= XNEW (struct dwarf2_cu
);
5348 init_one_comp_unit (cu
, this_cu
);
5349 /* If an error occurs while loading, release our storage. */
5350 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5353 /* A future optimization, if needed, would be to use an existing
5354 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5355 could share abbrev tables. */
5357 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5358 0 /* abbrev_table_provided */,
5359 NULL
/* stub_comp_unit_die */,
5360 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5362 &comp_unit_die
, &has_children
) == 0)
5365 do_cleanups (cleanups
);
5369 /* All the "real" work is done here. */
5370 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5372 /* This duplicates the code in init_cutu_and_read_dies,
5373 but the alternative is making the latter more complex.
5374 This function is only for the special case of using DWO files directly:
5375 no point in overly complicating the general case just to handle this. */
5376 if (free_cu_cleanup
!= NULL
)
5380 /* We've successfully allocated this compilation unit. Let our
5381 caller clean it up when finished with it. */
5382 discard_cleanups (free_cu_cleanup
);
5384 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5385 So we have to manually free the abbrev table. */
5386 dwarf2_free_abbrev_table (cu
);
5388 /* Link this CU into read_in_chain. */
5389 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5390 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5393 do_cleanups (free_cu_cleanup
);
5396 do_cleanups (cleanups
);
5399 /* Initialize a CU (or TU) and read its DIEs.
5400 If the CU defers to a DWO file, read the DWO file as well.
5402 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5403 Otherwise the table specified in the comp unit header is read in and used.
5404 This is an optimization for when we already have the abbrev table.
5406 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5407 Otherwise, a new CU is allocated with xmalloc.
5409 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5410 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5412 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5413 linker) then DIE_READER_FUNC will not get called. */
5416 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5417 struct abbrev_table
*abbrev_table
,
5418 int use_existing_cu
, int keep
,
5419 die_reader_func_ftype
*die_reader_func
,
5422 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5423 struct dwarf2_section_info
*section
= this_cu
->section
;
5424 bfd
*abfd
= get_section_bfd_owner (section
);
5425 struct dwarf2_cu
*cu
;
5426 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5427 struct die_reader_specs reader
;
5428 struct die_info
*comp_unit_die
;
5430 struct attribute
*attr
;
5431 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5432 struct signatured_type
*sig_type
= NULL
;
5433 struct dwarf2_section_info
*abbrev_section
;
5434 /* Non-zero if CU currently points to a DWO file and we need to
5435 reread it. When this happens we need to reread the skeleton die
5436 before we can reread the DWO file (this only applies to CUs, not TUs). */
5437 int rereading_dwo_cu
= 0;
5439 if (dwarf_die_debug
)
5440 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5441 this_cu
->is_debug_types
? "type" : "comp",
5442 this_cu
->offset
.sect_off
);
5444 if (use_existing_cu
)
5447 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5448 file (instead of going through the stub), short-circuit all of this. */
5449 if (this_cu
->reading_dwo_directly
)
5451 /* Narrow down the scope of possibilities to have to understand. */
5452 gdb_assert (this_cu
->is_debug_types
);
5453 gdb_assert (abbrev_table
== NULL
);
5454 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5455 die_reader_func
, data
);
5459 cleanups
= make_cleanup (null_cleanup
, NULL
);
5461 /* This is cheap if the section is already read in. */
5462 dwarf2_read_section (objfile
, section
);
5464 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5466 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5468 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5471 /* If this CU is from a DWO file we need to start over, we need to
5472 refetch the attributes from the skeleton CU.
5473 This could be optimized by retrieving those attributes from when we
5474 were here the first time: the previous comp_unit_die was stored in
5475 comp_unit_obstack. But there's no data yet that we need this
5477 if (cu
->dwo_unit
!= NULL
)
5478 rereading_dwo_cu
= 1;
5482 /* If !use_existing_cu, this_cu->cu must be NULL. */
5483 gdb_assert (this_cu
->cu
== NULL
);
5484 cu
= XNEW (struct dwarf2_cu
);
5485 init_one_comp_unit (cu
, this_cu
);
5486 /* If an error occurs while loading, release our storage. */
5487 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5490 /* Get the header. */
5491 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5493 /* We already have the header, there's no need to read it in again. */
5494 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5498 if (this_cu
->is_debug_types
)
5501 cu_offset type_offset_in_tu
;
5503 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5504 abbrev_section
, info_ptr
,
5506 &type_offset_in_tu
);
5508 /* Since per_cu is the first member of struct signatured_type,
5509 we can go from a pointer to one to a pointer to the other. */
5510 sig_type
= (struct signatured_type
*) this_cu
;
5511 gdb_assert (sig_type
->signature
== signature
);
5512 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5513 == type_offset_in_tu
.cu_off
);
5514 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5516 /* LENGTH has not been set yet for type units if we're
5517 using .gdb_index. */
5518 this_cu
->length
= get_cu_length (&cu
->header
);
5520 /* Establish the type offset that can be used to lookup the type. */
5521 sig_type
->type_offset_in_section
.sect_off
=
5522 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5526 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5530 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5531 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5535 /* Skip dummy compilation units. */
5536 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5537 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5539 do_cleanups (cleanups
);
5543 /* If we don't have them yet, read the abbrevs for this compilation unit.
5544 And if we need to read them now, make sure they're freed when we're
5545 done. Note that it's important that if the CU had an abbrev table
5546 on entry we don't free it when we're done: Somewhere up the call stack
5547 it may be in use. */
5548 if (abbrev_table
!= NULL
)
5550 gdb_assert (cu
->abbrev_table
== NULL
);
5551 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5552 == abbrev_table
->offset
.sect_off
);
5553 cu
->abbrev_table
= abbrev_table
;
5555 else if (cu
->abbrev_table
== NULL
)
5557 dwarf2_read_abbrevs (cu
, abbrev_section
);
5558 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5560 else if (rereading_dwo_cu
)
5562 dwarf2_free_abbrev_table (cu
);
5563 dwarf2_read_abbrevs (cu
, abbrev_section
);
5566 /* Read the top level CU/TU die. */
5567 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5568 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5570 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5572 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5573 DWO CU, that this test will fail (the attribute will not be present). */
5574 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5577 struct dwo_unit
*dwo_unit
;
5578 struct die_info
*dwo_comp_unit_die
;
5582 complaint (&symfile_complaints
,
5583 _("compilation unit with DW_AT_GNU_dwo_name"
5584 " has children (offset 0x%x) [in module %s]"),
5585 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5587 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5588 if (dwo_unit
!= NULL
)
5590 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5591 abbrev_table
!= NULL
,
5592 comp_unit_die
, NULL
,
5594 &dwo_comp_unit_die
, &has_children
) == 0)
5597 do_cleanups (cleanups
);
5600 comp_unit_die
= dwo_comp_unit_die
;
5604 /* Yikes, we couldn't find the rest of the DIE, we only have
5605 the stub. A complaint has already been logged. There's
5606 not much more we can do except pass on the stub DIE to
5607 die_reader_func. We don't want to throw an error on bad
5612 /* All of the above is setup for this call. Yikes. */
5613 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5615 /* Done, clean up. */
5616 if (free_cu_cleanup
!= NULL
)
5620 /* We've successfully allocated this compilation unit. Let our
5621 caller clean it up when finished with it. */
5622 discard_cleanups (free_cu_cleanup
);
5624 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5625 So we have to manually free the abbrev table. */
5626 dwarf2_free_abbrev_table (cu
);
5628 /* Link this CU into read_in_chain. */
5629 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5630 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5633 do_cleanups (free_cu_cleanup
);
5636 do_cleanups (cleanups
);
5639 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5640 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5641 to have already done the lookup to find the DWO file).
5643 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5644 THIS_CU->is_debug_types, but nothing else.
5646 We fill in THIS_CU->length.
5648 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5649 linker) then DIE_READER_FUNC will not get called.
5651 THIS_CU->cu is always freed when done.
5652 This is done in order to not leave THIS_CU->cu in a state where we have
5653 to care whether it refers to the "main" CU or the DWO CU. */
5656 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5657 struct dwo_file
*dwo_file
,
5658 die_reader_func_ftype
*die_reader_func
,
5661 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5662 struct dwarf2_section_info
*section
= this_cu
->section
;
5663 bfd
*abfd
= get_section_bfd_owner (section
);
5664 struct dwarf2_section_info
*abbrev_section
;
5665 struct dwarf2_cu cu
;
5666 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5667 struct die_reader_specs reader
;
5668 struct cleanup
*cleanups
;
5669 struct die_info
*comp_unit_die
;
5672 if (dwarf_die_debug
)
5673 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5674 this_cu
->is_debug_types
? "type" : "comp",
5675 this_cu
->offset
.sect_off
);
5677 gdb_assert (this_cu
->cu
== NULL
);
5679 abbrev_section
= (dwo_file
!= NULL
5680 ? &dwo_file
->sections
.abbrev
5681 : get_abbrev_section_for_cu (this_cu
));
5683 /* This is cheap if the section is already read in. */
5684 dwarf2_read_section (objfile
, section
);
5686 init_one_comp_unit (&cu
, this_cu
);
5688 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5690 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5691 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5692 abbrev_section
, info_ptr
,
5693 this_cu
->is_debug_types
);
5695 this_cu
->length
= get_cu_length (&cu
.header
);
5697 /* Skip dummy compilation units. */
5698 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5699 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5701 do_cleanups (cleanups
);
5705 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5706 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5708 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5709 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5711 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5713 do_cleanups (cleanups
);
5716 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5717 does not lookup the specified DWO file.
5718 This cannot be used to read DWO files.
5720 THIS_CU->cu is always freed when done.
5721 This is done in order to not leave THIS_CU->cu in a state where we have
5722 to care whether it refers to the "main" CU or the DWO CU.
5723 We can revisit this if the data shows there's a performance issue. */
5726 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5727 die_reader_func_ftype
*die_reader_func
,
5730 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5733 /* Type Unit Groups.
5735 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5736 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5737 so that all types coming from the same compilation (.o file) are grouped
5738 together. A future step could be to put the types in the same symtab as
5739 the CU the types ultimately came from. */
5742 hash_type_unit_group (const void *item
)
5744 const struct type_unit_group
*tu_group
= item
;
5746 return hash_stmt_list_entry (&tu_group
->hash
);
5750 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5752 const struct type_unit_group
*lhs
= item_lhs
;
5753 const struct type_unit_group
*rhs
= item_rhs
;
5755 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5758 /* Allocate a hash table for type unit groups. */
5761 allocate_type_unit_groups_table (void)
5763 return htab_create_alloc_ex (3,
5764 hash_type_unit_group
,
5767 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5768 hashtab_obstack_allocate
,
5769 dummy_obstack_deallocate
);
5772 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5773 partial symtabs. We combine several TUs per psymtab to not let the size
5774 of any one psymtab grow too big. */
5775 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5776 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5778 /* Helper routine for get_type_unit_group.
5779 Create the type_unit_group object used to hold one or more TUs. */
5781 static struct type_unit_group
*
5782 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5784 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5785 struct dwarf2_per_cu_data
*per_cu
;
5786 struct type_unit_group
*tu_group
;
5788 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5789 struct type_unit_group
);
5790 per_cu
= &tu_group
->per_cu
;
5791 per_cu
->objfile
= objfile
;
5793 if (dwarf2_per_objfile
->using_index
)
5795 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5796 struct dwarf2_per_cu_quick_data
);
5800 unsigned int line_offset
= line_offset_struct
.sect_off
;
5801 struct partial_symtab
*pst
;
5804 /* Give the symtab a useful name for debug purposes. */
5805 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5806 name
= xstrprintf ("<type_units_%d>",
5807 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5809 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5811 pst
= create_partial_symtab (per_cu
, name
);
5817 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5818 tu_group
->hash
.line_offset
= line_offset_struct
;
5823 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5824 STMT_LIST is a DW_AT_stmt_list attribute. */
5826 static struct type_unit_group
*
5827 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5829 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5830 struct type_unit_group
*tu_group
;
5832 unsigned int line_offset
;
5833 struct type_unit_group type_unit_group_for_lookup
;
5835 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5837 dwarf2_per_objfile
->type_unit_groups
=
5838 allocate_type_unit_groups_table ();
5841 /* Do we need to create a new group, or can we use an existing one? */
5845 line_offset
= DW_UNSND (stmt_list
);
5846 ++tu_stats
->nr_symtab_sharers
;
5850 /* Ugh, no stmt_list. Rare, but we have to handle it.
5851 We can do various things here like create one group per TU or
5852 spread them over multiple groups to split up the expansion work.
5853 To avoid worst case scenarios (too many groups or too large groups)
5854 we, umm, group them in bunches. */
5855 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5856 | (tu_stats
->nr_stmt_less_type_units
5857 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5858 ++tu_stats
->nr_stmt_less_type_units
;
5861 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5862 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5863 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5864 &type_unit_group_for_lookup
, INSERT
);
5868 gdb_assert (tu_group
!= NULL
);
5872 sect_offset line_offset_struct
;
5874 line_offset_struct
.sect_off
= line_offset
;
5875 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5877 ++tu_stats
->nr_symtabs
;
5883 /* Partial symbol tables. */
5885 /* Create a psymtab named NAME and assign it to PER_CU.
5887 The caller must fill in the following details:
5888 dirname, textlow, texthigh. */
5890 static struct partial_symtab
*
5891 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5893 struct objfile
*objfile
= per_cu
->objfile
;
5894 struct partial_symtab
*pst
;
5896 pst
= start_psymtab_common (objfile
, name
, 0,
5897 objfile
->global_psymbols
.next
,
5898 objfile
->static_psymbols
.next
);
5900 pst
->psymtabs_addrmap_supported
= 1;
5902 /* This is the glue that links PST into GDB's symbol API. */
5903 pst
->read_symtab_private
= per_cu
;
5904 pst
->read_symtab
= dwarf2_read_symtab
;
5905 per_cu
->v
.psymtab
= pst
;
5910 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5913 struct process_psymtab_comp_unit_data
5915 /* True if we are reading a DW_TAG_partial_unit. */
5917 int want_partial_unit
;
5919 /* The "pretend" language that is used if the CU doesn't declare a
5922 enum language pretend_language
;
5925 /* die_reader_func for process_psymtab_comp_unit. */
5928 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5929 const gdb_byte
*info_ptr
,
5930 struct die_info
*comp_unit_die
,
5934 struct dwarf2_cu
*cu
= reader
->cu
;
5935 struct objfile
*objfile
= cu
->objfile
;
5936 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5937 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5939 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5940 struct partial_symtab
*pst
;
5942 const char *filename
;
5943 struct process_psymtab_comp_unit_data
*info
= data
;
5945 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5948 gdb_assert (! per_cu
->is_debug_types
);
5950 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5952 cu
->list_in_scope
= &file_symbols
;
5954 /* Allocate a new partial symbol table structure. */
5955 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
5956 if (filename
== NULL
)
5959 pst
= create_partial_symtab (per_cu
, filename
);
5961 /* This must be done before calling dwarf2_build_include_psymtabs. */
5962 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5964 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5966 dwarf2_find_base_address (comp_unit_die
, cu
);
5968 /* Possibly set the default values of LOWPC and HIGHPC from
5970 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5971 &best_highpc
, cu
, pst
);
5972 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5973 /* Store the contiguous range if it is not empty; it can be empty for
5974 CUs with no code. */
5975 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5976 gdbarch_adjust_dwarf2_addr (gdbarch
,
5977 best_lowpc
+ baseaddr
),
5978 gdbarch_adjust_dwarf2_addr (gdbarch
,
5979 best_highpc
+ baseaddr
) - 1,
5982 /* Check if comp unit has_children.
5983 If so, read the rest of the partial symbols from this comp unit.
5984 If not, there's no more debug_info for this comp unit. */
5987 struct partial_die_info
*first_die
;
5988 CORE_ADDR lowpc
, highpc
;
5990 lowpc
= ((CORE_ADDR
) -1);
5991 highpc
= ((CORE_ADDR
) 0);
5993 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5995 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
5998 /* If we didn't find a lowpc, set it to highpc to avoid
5999 complaints from `maint check'. */
6000 if (lowpc
== ((CORE_ADDR
) -1))
6003 /* If the compilation unit didn't have an explicit address range,
6004 then use the information extracted from its child dies. */
6008 best_highpc
= highpc
;
6011 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6012 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6014 end_psymtab_common (objfile
, pst
);
6016 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6019 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6020 struct dwarf2_per_cu_data
*iter
;
6022 /* Fill in 'dependencies' here; we fill in 'users' in a
6024 pst
->number_of_dependencies
= len
;
6026 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6028 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6031 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6033 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6036 /* Get the list of files included in the current compilation unit,
6037 and build a psymtab for each of them. */
6038 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6040 if (dwarf_read_debug
)
6042 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6044 fprintf_unfiltered (gdb_stdlog
,
6045 "Psymtab for %s unit @0x%x: %s - %s"
6046 ", %d global, %d static syms\n",
6047 per_cu
->is_debug_types
? "type" : "comp",
6048 per_cu
->offset
.sect_off
,
6049 paddress (gdbarch
, pst
->textlow
),
6050 paddress (gdbarch
, pst
->texthigh
),
6051 pst
->n_global_syms
, pst
->n_static_syms
);
6055 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6056 Process compilation unit THIS_CU for a psymtab. */
6059 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6060 int want_partial_unit
,
6061 enum language pretend_language
)
6063 struct process_psymtab_comp_unit_data info
;
6065 /* If this compilation unit was already read in, free the
6066 cached copy in order to read it in again. This is
6067 necessary because we skipped some symbols when we first
6068 read in the compilation unit (see load_partial_dies).
6069 This problem could be avoided, but the benefit is unclear. */
6070 if (this_cu
->cu
!= NULL
)
6071 free_one_cached_comp_unit (this_cu
);
6073 gdb_assert (! this_cu
->is_debug_types
);
6074 info
.want_partial_unit
= want_partial_unit
;
6075 info
.pretend_language
= pretend_language
;
6076 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6077 process_psymtab_comp_unit_reader
,
6080 /* Age out any secondary CUs. */
6081 age_cached_comp_units ();
6084 /* Reader function for build_type_psymtabs. */
6087 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6088 const gdb_byte
*info_ptr
,
6089 struct die_info
*type_unit_die
,
6093 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6094 struct dwarf2_cu
*cu
= reader
->cu
;
6095 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6096 struct signatured_type
*sig_type
;
6097 struct type_unit_group
*tu_group
;
6098 struct attribute
*attr
;
6099 struct partial_die_info
*first_die
;
6100 CORE_ADDR lowpc
, highpc
;
6101 struct partial_symtab
*pst
;
6103 gdb_assert (data
== NULL
);
6104 gdb_assert (per_cu
->is_debug_types
);
6105 sig_type
= (struct signatured_type
*) per_cu
;
6110 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6111 tu_group
= get_type_unit_group (cu
, attr
);
6113 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6115 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6116 cu
->list_in_scope
= &file_symbols
;
6117 pst
= create_partial_symtab (per_cu
, "");
6120 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6122 lowpc
= (CORE_ADDR
) -1;
6123 highpc
= (CORE_ADDR
) 0;
6124 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6126 end_psymtab_common (objfile
, pst
);
6129 /* Struct used to sort TUs by their abbreviation table offset. */
6131 struct tu_abbrev_offset
6133 struct signatured_type
*sig_type
;
6134 sect_offset abbrev_offset
;
6137 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6140 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6142 const struct tu_abbrev_offset
* const *a
= ap
;
6143 const struct tu_abbrev_offset
* const *b
= bp
;
6144 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6145 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6147 return (aoff
> boff
) - (aoff
< boff
);
6150 /* Efficiently read all the type units.
6151 This does the bulk of the work for build_type_psymtabs.
6153 The efficiency is because we sort TUs by the abbrev table they use and
6154 only read each abbrev table once. In one program there are 200K TUs
6155 sharing 8K abbrev tables.
6157 The main purpose of this function is to support building the
6158 dwarf2_per_objfile->type_unit_groups table.
6159 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6160 can collapse the search space by grouping them by stmt_list.
6161 The savings can be significant, in the same program from above the 200K TUs
6162 share 8K stmt_list tables.
6164 FUNC is expected to call get_type_unit_group, which will create the
6165 struct type_unit_group if necessary and add it to
6166 dwarf2_per_objfile->type_unit_groups. */
6169 build_type_psymtabs_1 (void)
6171 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6172 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6173 struct cleanup
*cleanups
;
6174 struct abbrev_table
*abbrev_table
;
6175 sect_offset abbrev_offset
;
6176 struct tu_abbrev_offset
*sorted_by_abbrev
;
6177 struct type_unit_group
**iter
;
6180 /* It's up to the caller to not call us multiple times. */
6181 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6183 if (dwarf2_per_objfile
->n_type_units
== 0)
6186 /* TUs typically share abbrev tables, and there can be way more TUs than
6187 abbrev tables. Sort by abbrev table to reduce the number of times we
6188 read each abbrev table in.
6189 Alternatives are to punt or to maintain a cache of abbrev tables.
6190 This is simpler and efficient enough for now.
6192 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6193 symtab to use). Typically TUs with the same abbrev offset have the same
6194 stmt_list value too so in practice this should work well.
6196 The basic algorithm here is:
6198 sort TUs by abbrev table
6199 for each TU with same abbrev table:
6200 read abbrev table if first user
6201 read TU top level DIE
6202 [IWBN if DWO skeletons had DW_AT_stmt_list]
6205 if (dwarf_read_debug
)
6206 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6208 /* Sort in a separate table to maintain the order of all_type_units
6209 for .gdb_index: TU indices directly index all_type_units. */
6210 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6211 dwarf2_per_objfile
->n_type_units
);
6212 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6214 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6216 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6217 sorted_by_abbrev
[i
].abbrev_offset
=
6218 read_abbrev_offset (sig_type
->per_cu
.section
,
6219 sig_type
->per_cu
.offset
);
6221 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6222 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6223 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6225 abbrev_offset
.sect_off
= ~(unsigned) 0;
6226 abbrev_table
= NULL
;
6227 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6229 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6231 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6233 /* Switch to the next abbrev table if necessary. */
6234 if (abbrev_table
== NULL
6235 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6237 if (abbrev_table
!= NULL
)
6239 abbrev_table_free (abbrev_table
);
6240 /* Reset to NULL in case abbrev_table_read_table throws
6241 an error: abbrev_table_free_cleanup will get called. */
6242 abbrev_table
= NULL
;
6244 abbrev_offset
= tu
->abbrev_offset
;
6246 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6248 ++tu_stats
->nr_uniq_abbrev_tables
;
6251 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6252 build_type_psymtabs_reader
, NULL
);
6255 do_cleanups (cleanups
);
6258 /* Print collected type unit statistics. */
6261 print_tu_stats (void)
6263 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6265 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6266 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6267 dwarf2_per_objfile
->n_type_units
);
6268 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6269 tu_stats
->nr_uniq_abbrev_tables
);
6270 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6271 tu_stats
->nr_symtabs
);
6272 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6273 tu_stats
->nr_symtab_sharers
);
6274 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6275 tu_stats
->nr_stmt_less_type_units
);
6276 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6277 tu_stats
->nr_all_type_units_reallocs
);
6280 /* Traversal function for build_type_psymtabs. */
6283 build_type_psymtab_dependencies (void **slot
, void *info
)
6285 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6286 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6287 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6288 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6289 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6290 struct signatured_type
*iter
;
6293 gdb_assert (len
> 0);
6294 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6296 pst
->number_of_dependencies
= len
;
6298 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6300 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6303 gdb_assert (iter
->per_cu
.is_debug_types
);
6304 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6305 iter
->type_unit_group
= tu_group
;
6308 VEC_free (sig_type_ptr
, tu_group
->tus
);
6313 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6314 Build partial symbol tables for the .debug_types comp-units. */
6317 build_type_psymtabs (struct objfile
*objfile
)
6319 if (! create_all_type_units (objfile
))
6322 build_type_psymtabs_1 ();
6325 /* Traversal function for process_skeletonless_type_unit.
6326 Read a TU in a DWO file and build partial symbols for it. */
6329 process_skeletonless_type_unit (void **slot
, void *info
)
6331 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6332 struct objfile
*objfile
= info
;
6333 struct signatured_type find_entry
, *entry
;
6335 /* If this TU doesn't exist in the global table, add it and read it in. */
6337 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6339 dwarf2_per_objfile
->signatured_types
6340 = allocate_signatured_type_table (objfile
);
6343 find_entry
.signature
= dwo_unit
->signature
;
6344 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6346 /* If we've already seen this type there's nothing to do. What's happening
6347 is we're doing our own version of comdat-folding here. */
6351 /* This does the job that create_all_type_units would have done for
6353 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6354 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6357 /* This does the job that build_type_psymtabs_1 would have done. */
6358 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6359 build_type_psymtabs_reader
, NULL
);
6364 /* Traversal function for process_skeletonless_type_units. */
6367 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6369 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6371 if (dwo_file
->tus
!= NULL
)
6373 htab_traverse_noresize (dwo_file
->tus
,
6374 process_skeletonless_type_unit
, info
);
6380 /* Scan all TUs of DWO files, verifying we've processed them.
6381 This is needed in case a TU was emitted without its skeleton.
6382 Note: This can't be done until we know what all the DWO files are. */
6385 process_skeletonless_type_units (struct objfile
*objfile
)
6387 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6388 if (get_dwp_file () == NULL
6389 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6391 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6392 process_dwo_file_for_skeletonless_type_units
,
6397 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6400 psymtabs_addrmap_cleanup (void *o
)
6402 struct objfile
*objfile
= o
;
6404 objfile
->psymtabs_addrmap
= NULL
;
6407 /* Compute the 'user' field for each psymtab in OBJFILE. */
6410 set_partial_user (struct objfile
*objfile
)
6414 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6416 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6417 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6423 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6425 /* Set the 'user' field only if it is not already set. */
6426 if (pst
->dependencies
[j
]->user
== NULL
)
6427 pst
->dependencies
[j
]->user
= pst
;
6432 /* Build the partial symbol table by doing a quick pass through the
6433 .debug_info and .debug_abbrev sections. */
6436 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6438 struct cleanup
*back_to
, *addrmap_cleanup
;
6439 struct obstack temp_obstack
;
6442 if (dwarf_read_debug
)
6444 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6445 objfile_name (objfile
));
6448 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6450 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6452 /* Any cached compilation units will be linked by the per-objfile
6453 read_in_chain. Make sure to free them when we're done. */
6454 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6456 build_type_psymtabs (objfile
);
6458 create_all_comp_units (objfile
);
6460 /* Create a temporary address map on a temporary obstack. We later
6461 copy this to the final obstack. */
6462 obstack_init (&temp_obstack
);
6463 make_cleanup_obstack_free (&temp_obstack
);
6464 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6465 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6467 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6469 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6471 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6474 /* This has to wait until we read the CUs, we need the list of DWOs. */
6475 process_skeletonless_type_units (objfile
);
6477 /* Now that all TUs have been processed we can fill in the dependencies. */
6478 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6480 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6481 build_type_psymtab_dependencies
, NULL
);
6484 if (dwarf_read_debug
)
6487 set_partial_user (objfile
);
6489 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6490 &objfile
->objfile_obstack
);
6491 discard_cleanups (addrmap_cleanup
);
6493 do_cleanups (back_to
);
6495 if (dwarf_read_debug
)
6496 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6497 objfile_name (objfile
));
6500 /* die_reader_func for load_partial_comp_unit. */
6503 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6504 const gdb_byte
*info_ptr
,
6505 struct die_info
*comp_unit_die
,
6509 struct dwarf2_cu
*cu
= reader
->cu
;
6511 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6513 /* Check if comp unit has_children.
6514 If so, read the rest of the partial symbols from this comp unit.
6515 If not, there's no more debug_info for this comp unit. */
6517 load_partial_dies (reader
, info_ptr
, 0);
6520 /* Load the partial DIEs for a secondary CU into memory.
6521 This is also used when rereading a primary CU with load_all_dies. */
6524 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6526 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6527 load_partial_comp_unit_reader
, NULL
);
6531 read_comp_units_from_section (struct objfile
*objfile
,
6532 struct dwarf2_section_info
*section
,
6533 unsigned int is_dwz
,
6536 struct dwarf2_per_cu_data
***all_comp_units
)
6538 const gdb_byte
*info_ptr
;
6539 bfd
*abfd
= get_section_bfd_owner (section
);
6541 if (dwarf_read_debug
)
6542 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6543 get_section_name (section
),
6544 get_section_file_name (section
));
6546 dwarf2_read_section (objfile
, section
);
6548 info_ptr
= section
->buffer
;
6550 while (info_ptr
< section
->buffer
+ section
->size
)
6552 unsigned int length
, initial_length_size
;
6553 struct dwarf2_per_cu_data
*this_cu
;
6556 offset
.sect_off
= info_ptr
- section
->buffer
;
6558 /* Read just enough information to find out where the next
6559 compilation unit is. */
6560 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6562 /* Save the compilation unit for later lookup. */
6563 this_cu
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
);
6564 memset (this_cu
, 0, sizeof (*this_cu
));
6565 this_cu
->offset
= offset
;
6566 this_cu
->length
= length
+ initial_length_size
;
6567 this_cu
->is_dwz
= is_dwz
;
6568 this_cu
->objfile
= objfile
;
6569 this_cu
->section
= section
;
6571 if (*n_comp_units
== *n_allocated
)
6574 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6575 *all_comp_units
, *n_allocated
);
6577 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6580 info_ptr
= info_ptr
+ this_cu
->length
;
6584 /* Create a list of all compilation units in OBJFILE.
6585 This is only done for -readnow and building partial symtabs. */
6588 create_all_comp_units (struct objfile
*objfile
)
6592 struct dwarf2_per_cu_data
**all_comp_units
;
6593 struct dwz_file
*dwz
;
6597 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6599 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6600 &n_allocated
, &n_comp_units
, &all_comp_units
);
6602 dwz
= dwarf2_get_dwz_file ();
6604 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6605 &n_allocated
, &n_comp_units
,
6608 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6609 struct dwarf2_per_cu_data
*,
6611 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6612 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6613 xfree (all_comp_units
);
6614 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6617 /* Process all loaded DIEs for compilation unit CU, starting at
6618 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6619 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6620 DW_AT_ranges). See the comments of add_partial_subprogram on how
6621 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6624 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6625 CORE_ADDR
*highpc
, int set_addrmap
,
6626 struct dwarf2_cu
*cu
)
6628 struct partial_die_info
*pdi
;
6630 /* Now, march along the PDI's, descending into ones which have
6631 interesting children but skipping the children of the other ones,
6632 until we reach the end of the compilation unit. */
6638 fixup_partial_die (pdi
, cu
);
6640 /* Anonymous namespaces or modules have no name but have interesting
6641 children, so we need to look at them. Ditto for anonymous
6644 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6645 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6646 || pdi
->tag
== DW_TAG_imported_unit
)
6650 case DW_TAG_subprogram
:
6651 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6653 case DW_TAG_constant
:
6654 case DW_TAG_variable
:
6655 case DW_TAG_typedef
:
6656 case DW_TAG_union_type
:
6657 if (!pdi
->is_declaration
)
6659 add_partial_symbol (pdi
, cu
);
6662 case DW_TAG_class_type
:
6663 case DW_TAG_interface_type
:
6664 case DW_TAG_structure_type
:
6665 if (!pdi
->is_declaration
)
6667 add_partial_symbol (pdi
, cu
);
6670 case DW_TAG_enumeration_type
:
6671 if (!pdi
->is_declaration
)
6672 add_partial_enumeration (pdi
, cu
);
6674 case DW_TAG_base_type
:
6675 case DW_TAG_subrange_type
:
6676 /* File scope base type definitions are added to the partial
6678 add_partial_symbol (pdi
, cu
);
6680 case DW_TAG_namespace
:
6681 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6684 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6686 case DW_TAG_imported_unit
:
6688 struct dwarf2_per_cu_data
*per_cu
;
6690 /* For now we don't handle imported units in type units. */
6691 if (cu
->per_cu
->is_debug_types
)
6693 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6694 " supported in type units [in module %s]"),
6695 objfile_name (cu
->objfile
));
6698 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6702 /* Go read the partial unit, if needed. */
6703 if (per_cu
->v
.psymtab
== NULL
)
6704 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6706 VEC_safe_push (dwarf2_per_cu_ptr
,
6707 cu
->per_cu
->imported_symtabs
, per_cu
);
6710 case DW_TAG_imported_declaration
:
6711 add_partial_symbol (pdi
, cu
);
6718 /* If the die has a sibling, skip to the sibling. */
6720 pdi
= pdi
->die_sibling
;
6724 /* Functions used to compute the fully scoped name of a partial DIE.
6726 Normally, this is simple. For C++, the parent DIE's fully scoped
6727 name is concatenated with "::" and the partial DIE's name. For
6728 Java, the same thing occurs except that "." is used instead of "::".
6729 Enumerators are an exception; they use the scope of their parent
6730 enumeration type, i.e. the name of the enumeration type is not
6731 prepended to the enumerator.
6733 There are two complexities. One is DW_AT_specification; in this
6734 case "parent" means the parent of the target of the specification,
6735 instead of the direct parent of the DIE. The other is compilers
6736 which do not emit DW_TAG_namespace; in this case we try to guess
6737 the fully qualified name of structure types from their members'
6738 linkage names. This must be done using the DIE's children rather
6739 than the children of any DW_AT_specification target. We only need
6740 to do this for structures at the top level, i.e. if the target of
6741 any DW_AT_specification (if any; otherwise the DIE itself) does not
6744 /* Compute the scope prefix associated with PDI's parent, in
6745 compilation unit CU. The result will be allocated on CU's
6746 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6747 field. NULL is returned if no prefix is necessary. */
6749 partial_die_parent_scope (struct partial_die_info
*pdi
,
6750 struct dwarf2_cu
*cu
)
6752 const char *grandparent_scope
;
6753 struct partial_die_info
*parent
, *real_pdi
;
6755 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6756 then this means the parent of the specification DIE. */
6759 while (real_pdi
->has_specification
)
6760 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6761 real_pdi
->spec_is_dwz
, cu
);
6763 parent
= real_pdi
->die_parent
;
6767 if (parent
->scope_set
)
6768 return parent
->scope
;
6770 fixup_partial_die (parent
, cu
);
6772 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6774 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6775 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6776 Work around this problem here. */
6777 if (cu
->language
== language_cplus
6778 && parent
->tag
== DW_TAG_namespace
6779 && strcmp (parent
->name
, "::") == 0
6780 && grandparent_scope
== NULL
)
6782 parent
->scope
= NULL
;
6783 parent
->scope_set
= 1;
6787 if (pdi
->tag
== DW_TAG_enumerator
)
6788 /* Enumerators should not get the name of the enumeration as a prefix. */
6789 parent
->scope
= grandparent_scope
;
6790 else if (parent
->tag
== DW_TAG_namespace
6791 || parent
->tag
== DW_TAG_module
6792 || parent
->tag
== DW_TAG_structure_type
6793 || parent
->tag
== DW_TAG_class_type
6794 || parent
->tag
== DW_TAG_interface_type
6795 || parent
->tag
== DW_TAG_union_type
6796 || parent
->tag
== DW_TAG_enumeration_type
)
6798 if (grandparent_scope
== NULL
)
6799 parent
->scope
= parent
->name
;
6801 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6803 parent
->name
, 0, cu
);
6807 /* FIXME drow/2004-04-01: What should we be doing with
6808 function-local names? For partial symbols, we should probably be
6810 complaint (&symfile_complaints
,
6811 _("unhandled containing DIE tag %d for DIE at %d"),
6812 parent
->tag
, pdi
->offset
.sect_off
);
6813 parent
->scope
= grandparent_scope
;
6816 parent
->scope_set
= 1;
6817 return parent
->scope
;
6820 /* Return the fully scoped name associated with PDI, from compilation unit
6821 CU. The result will be allocated with malloc. */
6824 partial_die_full_name (struct partial_die_info
*pdi
,
6825 struct dwarf2_cu
*cu
)
6827 const char *parent_scope
;
6829 /* If this is a template instantiation, we can not work out the
6830 template arguments from partial DIEs. So, unfortunately, we have
6831 to go through the full DIEs. At least any work we do building
6832 types here will be reused if full symbols are loaded later. */
6833 if (pdi
->has_template_arguments
)
6835 fixup_partial_die (pdi
, cu
);
6837 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6839 struct die_info
*die
;
6840 struct attribute attr
;
6841 struct dwarf2_cu
*ref_cu
= cu
;
6843 /* DW_FORM_ref_addr is using section offset. */
6845 attr
.form
= DW_FORM_ref_addr
;
6846 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6847 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6849 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6853 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6854 if (parent_scope
== NULL
)
6857 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6861 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6863 struct objfile
*objfile
= cu
->objfile
;
6864 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6866 const char *actual_name
= NULL
;
6868 char *built_actual_name
;
6870 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6872 built_actual_name
= partial_die_full_name (pdi
, cu
);
6873 if (built_actual_name
!= NULL
)
6874 actual_name
= built_actual_name
;
6876 if (actual_name
== NULL
)
6877 actual_name
= pdi
->name
;
6881 case DW_TAG_subprogram
:
6882 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6883 if (pdi
->is_external
|| cu
->language
== language_ada
)
6885 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6886 of the global scope. But in Ada, we want to be able to access
6887 nested procedures globally. So all Ada subprograms are stored
6888 in the global scope. */
6889 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6890 built_actual_name
!= NULL
,
6891 VAR_DOMAIN
, LOC_BLOCK
,
6892 &objfile
->global_psymbols
,
6893 addr
, cu
->language
, objfile
);
6897 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6898 built_actual_name
!= NULL
,
6899 VAR_DOMAIN
, LOC_BLOCK
,
6900 &objfile
->static_psymbols
,
6901 addr
, cu
->language
, objfile
);
6904 case DW_TAG_constant
:
6906 struct psymbol_allocation_list
*list
;
6908 if (pdi
->is_external
)
6909 list
= &objfile
->global_psymbols
;
6911 list
= &objfile
->static_psymbols
;
6912 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6913 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6914 list
, 0, cu
->language
, objfile
);
6917 case DW_TAG_variable
:
6919 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6923 && !dwarf2_per_objfile
->has_section_at_zero
)
6925 /* A global or static variable may also have been stripped
6926 out by the linker if unused, in which case its address
6927 will be nullified; do not add such variables into partial
6928 symbol table then. */
6930 else if (pdi
->is_external
)
6933 Don't enter into the minimal symbol tables as there is
6934 a minimal symbol table entry from the ELF symbols already.
6935 Enter into partial symbol table if it has a location
6936 descriptor or a type.
6937 If the location descriptor is missing, new_symbol will create
6938 a LOC_UNRESOLVED symbol, the address of the variable will then
6939 be determined from the minimal symbol table whenever the variable
6941 The address for the partial symbol table entry is not
6942 used by GDB, but it comes in handy for debugging partial symbol
6945 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6946 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6947 built_actual_name
!= NULL
,
6948 VAR_DOMAIN
, LOC_STATIC
,
6949 &objfile
->global_psymbols
,
6951 cu
->language
, objfile
);
6955 int has_loc
= pdi
->d
.locdesc
!= NULL
;
6957 /* Static Variable. Skip symbols whose value we cannot know (those
6958 without location descriptors or constant values). */
6959 if (!has_loc
&& !pdi
->has_const_value
)
6961 xfree (built_actual_name
);
6965 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6966 built_actual_name
!= NULL
,
6967 VAR_DOMAIN
, LOC_STATIC
,
6968 &objfile
->static_psymbols
,
6969 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
6970 cu
->language
, objfile
);
6973 case DW_TAG_typedef
:
6974 case DW_TAG_base_type
:
6975 case DW_TAG_subrange_type
:
6976 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6977 built_actual_name
!= NULL
,
6978 VAR_DOMAIN
, LOC_TYPEDEF
,
6979 &objfile
->static_psymbols
,
6980 0, cu
->language
, objfile
);
6982 case DW_TAG_imported_declaration
:
6983 case DW_TAG_namespace
:
6984 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6985 built_actual_name
!= NULL
,
6986 VAR_DOMAIN
, LOC_TYPEDEF
,
6987 &objfile
->global_psymbols
,
6988 0, cu
->language
, objfile
);
6991 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6992 built_actual_name
!= NULL
,
6993 MODULE_DOMAIN
, LOC_TYPEDEF
,
6994 &objfile
->global_psymbols
,
6995 0, cu
->language
, objfile
);
6997 case DW_TAG_class_type
:
6998 case DW_TAG_interface_type
:
6999 case DW_TAG_structure_type
:
7000 case DW_TAG_union_type
:
7001 case DW_TAG_enumeration_type
:
7002 /* Skip external references. The DWARF standard says in the section
7003 about "Structure, Union, and Class Type Entries": "An incomplete
7004 structure, union or class type is represented by a structure,
7005 union or class entry that does not have a byte size attribute
7006 and that has a DW_AT_declaration attribute." */
7007 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7009 xfree (built_actual_name
);
7013 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7014 static vs. global. */
7015 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7016 built_actual_name
!= NULL
,
7017 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7018 (cu
->language
== language_cplus
7019 || cu
->language
== language_java
)
7020 ? &objfile
->global_psymbols
7021 : &objfile
->static_psymbols
,
7022 0, cu
->language
, objfile
);
7025 case DW_TAG_enumerator
:
7026 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7027 built_actual_name
!= NULL
,
7028 VAR_DOMAIN
, LOC_CONST
,
7029 (cu
->language
== language_cplus
7030 || cu
->language
== language_java
)
7031 ? &objfile
->global_psymbols
7032 : &objfile
->static_psymbols
,
7033 0, cu
->language
, objfile
);
7039 xfree (built_actual_name
);
7042 /* Read a partial die corresponding to a namespace; also, add a symbol
7043 corresponding to that namespace to the symbol table. NAMESPACE is
7044 the name of the enclosing namespace. */
7047 add_partial_namespace (struct partial_die_info
*pdi
,
7048 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7049 int set_addrmap
, struct dwarf2_cu
*cu
)
7051 /* Add a symbol for the namespace. */
7053 add_partial_symbol (pdi
, cu
);
7055 /* Now scan partial symbols in that namespace. */
7057 if (pdi
->has_children
)
7058 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7061 /* Read a partial die corresponding to a Fortran module. */
7064 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7065 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7067 /* Add a symbol for the namespace. */
7069 add_partial_symbol (pdi
, cu
);
7071 /* Now scan partial symbols in that module. */
7073 if (pdi
->has_children
)
7074 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7077 /* Read a partial die corresponding to a subprogram and create a partial
7078 symbol for that subprogram. When the CU language allows it, this
7079 routine also defines a partial symbol for each nested subprogram
7080 that this subprogram contains. If SET_ADDRMAP is true, record the
7081 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7082 and highest PC values found in PDI.
7084 PDI may also be a lexical block, in which case we simply search
7085 recursively for subprograms defined inside that lexical block.
7086 Again, this is only performed when the CU language allows this
7087 type of definitions. */
7090 add_partial_subprogram (struct partial_die_info
*pdi
,
7091 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7092 int set_addrmap
, struct dwarf2_cu
*cu
)
7094 if (pdi
->tag
== DW_TAG_subprogram
)
7096 if (pdi
->has_pc_info
)
7098 if (pdi
->lowpc
< *lowpc
)
7099 *lowpc
= pdi
->lowpc
;
7100 if (pdi
->highpc
> *highpc
)
7101 *highpc
= pdi
->highpc
;
7104 struct objfile
*objfile
= cu
->objfile
;
7105 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7110 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7111 SECT_OFF_TEXT (objfile
));
7112 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7113 pdi
->lowpc
+ baseaddr
);
7114 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7115 pdi
->highpc
+ baseaddr
);
7116 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7117 cu
->per_cu
->v
.psymtab
);
7121 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7123 if (!pdi
->is_declaration
)
7124 /* Ignore subprogram DIEs that do not have a name, they are
7125 illegal. Do not emit a complaint at this point, we will
7126 do so when we convert this psymtab into a symtab. */
7128 add_partial_symbol (pdi
, cu
);
7132 if (! pdi
->has_children
)
7135 if (cu
->language
== language_ada
)
7137 pdi
= pdi
->die_child
;
7140 fixup_partial_die (pdi
, cu
);
7141 if (pdi
->tag
== DW_TAG_subprogram
7142 || pdi
->tag
== DW_TAG_lexical_block
)
7143 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7144 pdi
= pdi
->die_sibling
;
7149 /* Read a partial die corresponding to an enumeration type. */
7152 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7153 struct dwarf2_cu
*cu
)
7155 struct partial_die_info
*pdi
;
7157 if (enum_pdi
->name
!= NULL
)
7158 add_partial_symbol (enum_pdi
, cu
);
7160 pdi
= enum_pdi
->die_child
;
7163 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7164 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7166 add_partial_symbol (pdi
, cu
);
7167 pdi
= pdi
->die_sibling
;
7171 /* Return the initial uleb128 in the die at INFO_PTR. */
7174 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7176 unsigned int bytes_read
;
7178 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7181 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7182 Return the corresponding abbrev, or NULL if the number is zero (indicating
7183 an empty DIE). In either case *BYTES_READ will be set to the length of
7184 the initial number. */
7186 static struct abbrev_info
*
7187 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7188 struct dwarf2_cu
*cu
)
7190 bfd
*abfd
= cu
->objfile
->obfd
;
7191 unsigned int abbrev_number
;
7192 struct abbrev_info
*abbrev
;
7194 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7196 if (abbrev_number
== 0)
7199 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7202 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7203 " at offset 0x%x [in module %s]"),
7204 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7205 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7211 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7212 Returns a pointer to the end of a series of DIEs, terminated by an empty
7213 DIE. Any children of the skipped DIEs will also be skipped. */
7215 static const gdb_byte
*
7216 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7218 struct dwarf2_cu
*cu
= reader
->cu
;
7219 struct abbrev_info
*abbrev
;
7220 unsigned int bytes_read
;
7224 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7226 return info_ptr
+ bytes_read
;
7228 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7232 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7233 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7234 abbrev corresponding to that skipped uleb128 should be passed in
7235 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7238 static const gdb_byte
*
7239 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7240 struct abbrev_info
*abbrev
)
7242 unsigned int bytes_read
;
7243 struct attribute attr
;
7244 bfd
*abfd
= reader
->abfd
;
7245 struct dwarf2_cu
*cu
= reader
->cu
;
7246 const gdb_byte
*buffer
= reader
->buffer
;
7247 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7248 const gdb_byte
*start_info_ptr
= info_ptr
;
7249 unsigned int form
, i
;
7251 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7253 /* The only abbrev we care about is DW_AT_sibling. */
7254 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7256 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7257 if (attr
.form
== DW_FORM_ref_addr
)
7258 complaint (&symfile_complaints
,
7259 _("ignoring absolute DW_AT_sibling"));
7262 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7263 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7265 if (sibling_ptr
< info_ptr
)
7266 complaint (&symfile_complaints
,
7267 _("DW_AT_sibling points backwards"));
7268 else if (sibling_ptr
> reader
->buffer_end
)
7269 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7275 /* If it isn't DW_AT_sibling, skip this attribute. */
7276 form
= abbrev
->attrs
[i
].form
;
7280 case DW_FORM_ref_addr
:
7281 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7282 and later it is offset sized. */
7283 if (cu
->header
.version
== 2)
7284 info_ptr
+= cu
->header
.addr_size
;
7286 info_ptr
+= cu
->header
.offset_size
;
7288 case DW_FORM_GNU_ref_alt
:
7289 info_ptr
+= cu
->header
.offset_size
;
7292 info_ptr
+= cu
->header
.addr_size
;
7299 case DW_FORM_flag_present
:
7311 case DW_FORM_ref_sig8
:
7314 case DW_FORM_string
:
7315 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7316 info_ptr
+= bytes_read
;
7318 case DW_FORM_sec_offset
:
7320 case DW_FORM_GNU_strp_alt
:
7321 info_ptr
+= cu
->header
.offset_size
;
7323 case DW_FORM_exprloc
:
7325 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7326 info_ptr
+= bytes_read
;
7328 case DW_FORM_block1
:
7329 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7331 case DW_FORM_block2
:
7332 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7334 case DW_FORM_block4
:
7335 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7339 case DW_FORM_ref_udata
:
7340 case DW_FORM_GNU_addr_index
:
7341 case DW_FORM_GNU_str_index
:
7342 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7344 case DW_FORM_indirect
:
7345 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7346 info_ptr
+= bytes_read
;
7347 /* We need to continue parsing from here, so just go back to
7349 goto skip_attribute
;
7352 error (_("Dwarf Error: Cannot handle %s "
7353 "in DWARF reader [in module %s]"),
7354 dwarf_form_name (form
),
7355 bfd_get_filename (abfd
));
7359 if (abbrev
->has_children
)
7360 return skip_children (reader
, info_ptr
);
7365 /* Locate ORIG_PDI's sibling.
7366 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7368 static const gdb_byte
*
7369 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7370 struct partial_die_info
*orig_pdi
,
7371 const gdb_byte
*info_ptr
)
7373 /* Do we know the sibling already? */
7375 if (orig_pdi
->sibling
)
7376 return orig_pdi
->sibling
;
7378 /* Are there any children to deal with? */
7380 if (!orig_pdi
->has_children
)
7383 /* Skip the children the long way. */
7385 return skip_children (reader
, info_ptr
);
7388 /* Expand this partial symbol table into a full symbol table. SELF is
7392 dwarf2_read_symtab (struct partial_symtab
*self
,
7393 struct objfile
*objfile
)
7397 warning (_("bug: psymtab for %s is already read in."),
7404 printf_filtered (_("Reading in symbols for %s..."),
7406 gdb_flush (gdb_stdout
);
7409 /* Restore our global data. */
7410 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7412 /* If this psymtab is constructed from a debug-only objfile, the
7413 has_section_at_zero flag will not necessarily be correct. We
7414 can get the correct value for this flag by looking at the data
7415 associated with the (presumably stripped) associated objfile. */
7416 if (objfile
->separate_debug_objfile_backlink
)
7418 struct dwarf2_per_objfile
*dpo_backlink
7419 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7420 dwarf2_objfile_data_key
);
7422 dwarf2_per_objfile
->has_section_at_zero
7423 = dpo_backlink
->has_section_at_zero
;
7426 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7428 psymtab_to_symtab_1 (self
);
7430 /* Finish up the debug error message. */
7432 printf_filtered (_("done.\n"));
7435 process_cu_includes ();
7438 /* Reading in full CUs. */
7440 /* Add PER_CU to the queue. */
7443 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7444 enum language pretend_language
)
7446 struct dwarf2_queue_item
*item
;
7449 item
= XNEW (struct dwarf2_queue_item
);
7450 item
->per_cu
= per_cu
;
7451 item
->pretend_language
= pretend_language
;
7454 if (dwarf2_queue
== NULL
)
7455 dwarf2_queue
= item
;
7457 dwarf2_queue_tail
->next
= item
;
7459 dwarf2_queue_tail
= item
;
7462 /* If PER_CU is not yet queued, add it to the queue.
7463 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7465 The result is non-zero if PER_CU was queued, otherwise the result is zero
7466 meaning either PER_CU is already queued or it is already loaded.
7468 N.B. There is an invariant here that if a CU is queued then it is loaded.
7469 The caller is required to load PER_CU if we return non-zero. */
7472 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7473 struct dwarf2_per_cu_data
*per_cu
,
7474 enum language pretend_language
)
7476 /* We may arrive here during partial symbol reading, if we need full
7477 DIEs to process an unusual case (e.g. template arguments). Do
7478 not queue PER_CU, just tell our caller to load its DIEs. */
7479 if (dwarf2_per_objfile
->reading_partial_symbols
)
7481 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7486 /* Mark the dependence relation so that we don't flush PER_CU
7488 if (dependent_cu
!= NULL
)
7489 dwarf2_add_dependence (dependent_cu
, per_cu
);
7491 /* If it's already on the queue, we have nothing to do. */
7495 /* If the compilation unit is already loaded, just mark it as
7497 if (per_cu
->cu
!= NULL
)
7499 per_cu
->cu
->last_used
= 0;
7503 /* Add it to the queue. */
7504 queue_comp_unit (per_cu
, pretend_language
);
7509 /* Process the queue. */
7512 process_queue (void)
7514 struct dwarf2_queue_item
*item
, *next_item
;
7516 if (dwarf_read_debug
)
7518 fprintf_unfiltered (gdb_stdlog
,
7519 "Expanding one or more symtabs of objfile %s ...\n",
7520 objfile_name (dwarf2_per_objfile
->objfile
));
7523 /* The queue starts out with one item, but following a DIE reference
7524 may load a new CU, adding it to the end of the queue. */
7525 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7527 if ((dwarf2_per_objfile
->using_index
7528 ? !item
->per_cu
->v
.quick
->compunit_symtab
7529 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7530 /* Skip dummy CUs. */
7531 && item
->per_cu
->cu
!= NULL
)
7533 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7534 unsigned int debug_print_threshold
;
7537 if (per_cu
->is_debug_types
)
7539 struct signatured_type
*sig_type
=
7540 (struct signatured_type
*) per_cu
;
7542 sprintf (buf
, "TU %s at offset 0x%x",
7543 hex_string (sig_type
->signature
),
7544 per_cu
->offset
.sect_off
);
7545 /* There can be 100s of TUs.
7546 Only print them in verbose mode. */
7547 debug_print_threshold
= 2;
7551 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7552 debug_print_threshold
= 1;
7555 if (dwarf_read_debug
>= debug_print_threshold
)
7556 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7558 if (per_cu
->is_debug_types
)
7559 process_full_type_unit (per_cu
, item
->pretend_language
);
7561 process_full_comp_unit (per_cu
, item
->pretend_language
);
7563 if (dwarf_read_debug
>= debug_print_threshold
)
7564 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7567 item
->per_cu
->queued
= 0;
7568 next_item
= item
->next
;
7572 dwarf2_queue_tail
= NULL
;
7574 if (dwarf_read_debug
)
7576 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7577 objfile_name (dwarf2_per_objfile
->objfile
));
7581 /* Free all allocated queue entries. This function only releases anything if
7582 an error was thrown; if the queue was processed then it would have been
7583 freed as we went along. */
7586 dwarf2_release_queue (void *dummy
)
7588 struct dwarf2_queue_item
*item
, *last
;
7590 item
= dwarf2_queue
;
7593 /* Anything still marked queued is likely to be in an
7594 inconsistent state, so discard it. */
7595 if (item
->per_cu
->queued
)
7597 if (item
->per_cu
->cu
!= NULL
)
7598 free_one_cached_comp_unit (item
->per_cu
);
7599 item
->per_cu
->queued
= 0;
7607 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7610 /* Read in full symbols for PST, and anything it depends on. */
7613 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7615 struct dwarf2_per_cu_data
*per_cu
;
7621 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7622 if (!pst
->dependencies
[i
]->readin
7623 && pst
->dependencies
[i
]->user
== NULL
)
7625 /* Inform about additional files that need to be read in. */
7628 /* FIXME: i18n: Need to make this a single string. */
7629 fputs_filtered (" ", gdb_stdout
);
7631 fputs_filtered ("and ", gdb_stdout
);
7633 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7634 wrap_here (""); /* Flush output. */
7635 gdb_flush (gdb_stdout
);
7637 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7640 per_cu
= pst
->read_symtab_private
;
7644 /* It's an include file, no symbols to read for it.
7645 Everything is in the parent symtab. */
7650 dw2_do_instantiate_symtab (per_cu
);
7653 /* Trivial hash function for die_info: the hash value of a DIE
7654 is its offset in .debug_info for this objfile. */
7657 die_hash (const void *item
)
7659 const struct die_info
*die
= item
;
7661 return die
->offset
.sect_off
;
7664 /* Trivial comparison function for die_info structures: two DIEs
7665 are equal if they have the same offset. */
7668 die_eq (const void *item_lhs
, const void *item_rhs
)
7670 const struct die_info
*die_lhs
= item_lhs
;
7671 const struct die_info
*die_rhs
= item_rhs
;
7673 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7676 /* die_reader_func for load_full_comp_unit.
7677 This is identical to read_signatured_type_reader,
7678 but is kept separate for now. */
7681 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7682 const gdb_byte
*info_ptr
,
7683 struct die_info
*comp_unit_die
,
7687 struct dwarf2_cu
*cu
= reader
->cu
;
7688 enum language
*language_ptr
= data
;
7690 gdb_assert (cu
->die_hash
== NULL
);
7692 htab_create_alloc_ex (cu
->header
.length
/ 12,
7696 &cu
->comp_unit_obstack
,
7697 hashtab_obstack_allocate
,
7698 dummy_obstack_deallocate
);
7701 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7702 &info_ptr
, comp_unit_die
);
7703 cu
->dies
= comp_unit_die
;
7704 /* comp_unit_die is not stored in die_hash, no need. */
7706 /* We try not to read any attributes in this function, because not
7707 all CUs needed for references have been loaded yet, and symbol
7708 table processing isn't initialized. But we have to set the CU language,
7709 or we won't be able to build types correctly.
7710 Similarly, if we do not read the producer, we can not apply
7711 producer-specific interpretation. */
7712 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7715 /* Load the DIEs associated with PER_CU into memory. */
7718 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7719 enum language pretend_language
)
7721 gdb_assert (! this_cu
->is_debug_types
);
7723 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7724 load_full_comp_unit_reader
, &pretend_language
);
7727 /* Add a DIE to the delayed physname list. */
7730 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7731 const char *name
, struct die_info
*die
,
7732 struct dwarf2_cu
*cu
)
7734 struct delayed_method_info mi
;
7736 mi
.fnfield_index
= fnfield_index
;
7740 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7743 /* A cleanup for freeing the delayed method list. */
7746 free_delayed_list (void *ptr
)
7748 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7749 if (cu
->method_list
!= NULL
)
7751 VEC_free (delayed_method_info
, cu
->method_list
);
7752 cu
->method_list
= NULL
;
7756 /* Compute the physnames of any methods on the CU's method list.
7758 The computation of method physnames is delayed in order to avoid the
7759 (bad) condition that one of the method's formal parameters is of an as yet
7763 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7766 struct delayed_method_info
*mi
;
7767 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7769 const char *physname
;
7770 struct fn_fieldlist
*fn_flp
7771 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7772 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7773 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7774 = physname
? physname
: "";
7778 /* Go objects should be embedded in a DW_TAG_module DIE,
7779 and it's not clear if/how imported objects will appear.
7780 To keep Go support simple until that's worked out,
7781 go back through what we've read and create something usable.
7782 We could do this while processing each DIE, and feels kinda cleaner,
7783 but that way is more invasive.
7784 This is to, for example, allow the user to type "p var" or "b main"
7785 without having to specify the package name, and allow lookups
7786 of module.object to work in contexts that use the expression
7790 fixup_go_packaging (struct dwarf2_cu
*cu
)
7792 char *package_name
= NULL
;
7793 struct pending
*list
;
7796 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7798 for (i
= 0; i
< list
->nsyms
; ++i
)
7800 struct symbol
*sym
= list
->symbol
[i
];
7802 if (SYMBOL_LANGUAGE (sym
) == language_go
7803 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7805 char *this_package_name
= go_symbol_package_name (sym
);
7807 if (this_package_name
== NULL
)
7809 if (package_name
== NULL
)
7810 package_name
= this_package_name
;
7813 if (strcmp (package_name
, this_package_name
) != 0)
7814 complaint (&symfile_complaints
,
7815 _("Symtab %s has objects from two different Go packages: %s and %s"),
7816 (symbol_symtab (sym
) != NULL
7817 ? symtab_to_filename_for_display
7818 (symbol_symtab (sym
))
7819 : objfile_name (cu
->objfile
)),
7820 this_package_name
, package_name
);
7821 xfree (this_package_name
);
7827 if (package_name
!= NULL
)
7829 struct objfile
*objfile
= cu
->objfile
;
7830 const char *saved_package_name
7831 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7833 strlen (package_name
));
7834 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7835 saved_package_name
, objfile
);
7838 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7840 sym
= allocate_symbol (objfile
);
7841 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7842 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7843 strlen (saved_package_name
), 0, objfile
);
7844 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7845 e.g., "main" finds the "main" module and not C's main(). */
7846 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7847 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7848 SYMBOL_TYPE (sym
) = type
;
7850 add_symbol_to_list (sym
, &global_symbols
);
7852 xfree (package_name
);
7856 /* Return the symtab for PER_CU. This works properly regardless of
7857 whether we're using the index or psymtabs. */
7859 static struct compunit_symtab
*
7860 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7862 return (dwarf2_per_objfile
->using_index
7863 ? per_cu
->v
.quick
->compunit_symtab
7864 : per_cu
->v
.psymtab
->compunit_symtab
);
7867 /* A helper function for computing the list of all symbol tables
7868 included by PER_CU. */
7871 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7872 htab_t all_children
, htab_t all_type_symtabs
,
7873 struct dwarf2_per_cu_data
*per_cu
,
7874 struct compunit_symtab
*immediate_parent
)
7878 struct compunit_symtab
*cust
;
7879 struct dwarf2_per_cu_data
*iter
;
7881 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7884 /* This inclusion and its children have been processed. */
7889 /* Only add a CU if it has a symbol table. */
7890 cust
= get_compunit_symtab (per_cu
);
7893 /* If this is a type unit only add its symbol table if we haven't
7894 seen it yet (type unit per_cu's can share symtabs). */
7895 if (per_cu
->is_debug_types
)
7897 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7901 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7902 if (cust
->user
== NULL
)
7903 cust
->user
= immediate_parent
;
7908 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7909 if (cust
->user
== NULL
)
7910 cust
->user
= immediate_parent
;
7915 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7918 recursively_compute_inclusions (result
, all_children
,
7919 all_type_symtabs
, iter
, cust
);
7923 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7927 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7929 gdb_assert (! per_cu
->is_debug_types
);
7931 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7934 struct dwarf2_per_cu_data
*per_cu_iter
;
7935 struct compunit_symtab
*compunit_symtab_iter
;
7936 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7937 htab_t all_children
, all_type_symtabs
;
7938 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7940 /* If we don't have a symtab, we can just skip this case. */
7944 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7945 NULL
, xcalloc
, xfree
);
7946 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7947 NULL
, xcalloc
, xfree
);
7950 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7954 recursively_compute_inclusions (&result_symtabs
, all_children
,
7955 all_type_symtabs
, per_cu_iter
,
7959 /* Now we have a transitive closure of all the included symtabs. */
7960 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7962 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7963 struct compunit_symtab
*, len
+ 1);
7965 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7966 compunit_symtab_iter
);
7968 cust
->includes
[ix
] = compunit_symtab_iter
;
7969 cust
->includes
[len
] = NULL
;
7971 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7972 htab_delete (all_children
);
7973 htab_delete (all_type_symtabs
);
7977 /* Compute the 'includes' field for the symtabs of all the CUs we just
7981 process_cu_includes (void)
7984 struct dwarf2_per_cu_data
*iter
;
7987 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
7991 if (! iter
->is_debug_types
)
7992 compute_compunit_symtab_includes (iter
);
7995 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
7998 /* Generate full symbol information for PER_CU, whose DIEs have
7999 already been loaded into memory. */
8002 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8003 enum language pretend_language
)
8005 struct dwarf2_cu
*cu
= per_cu
->cu
;
8006 struct objfile
*objfile
= per_cu
->objfile
;
8007 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8008 CORE_ADDR lowpc
, highpc
;
8009 struct compunit_symtab
*cust
;
8010 struct cleanup
*back_to
, *delayed_list_cleanup
;
8012 struct block
*static_block
;
8015 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8018 back_to
= make_cleanup (really_free_pendings
, NULL
);
8019 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8021 cu
->list_in_scope
= &file_symbols
;
8023 cu
->language
= pretend_language
;
8024 cu
->language_defn
= language_def (cu
->language
);
8026 /* Do line number decoding in read_file_scope () */
8027 process_die (cu
->dies
, cu
);
8029 /* For now fudge the Go package. */
8030 if (cu
->language
== language_go
)
8031 fixup_go_packaging (cu
);
8033 /* Now that we have processed all the DIEs in the CU, all the types
8034 should be complete, and it should now be safe to compute all of the
8036 compute_delayed_physnames (cu
);
8037 do_cleanups (delayed_list_cleanup
);
8039 /* Some compilers don't define a DW_AT_high_pc attribute for the
8040 compilation unit. If the DW_AT_high_pc is missing, synthesize
8041 it, by scanning the DIE's below the compilation unit. */
8042 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8044 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8045 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8047 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8048 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8049 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8050 addrmap to help ensure it has an accurate map of pc values belonging to
8052 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8054 cust
= end_symtab_from_static_block (static_block
,
8055 SECT_OFF_TEXT (objfile
), 0);
8059 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8061 /* Set symtab language to language from DW_AT_language. If the
8062 compilation is from a C file generated by language preprocessors, do
8063 not set the language if it was already deduced by start_subfile. */
8064 if (!(cu
->language
== language_c
8065 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8066 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8068 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8069 produce DW_AT_location with location lists but it can be possibly
8070 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8071 there were bugs in prologue debug info, fixed later in GCC-4.5
8072 by "unwind info for epilogues" patch (which is not directly related).
8074 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8075 needed, it would be wrong due to missing DW_AT_producer there.
8077 Still one can confuse GDB by using non-standard GCC compilation
8078 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8080 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8081 cust
->locations_valid
= 1;
8083 if (gcc_4_minor
>= 5)
8084 cust
->epilogue_unwind_valid
= 1;
8086 cust
->call_site_htab
= cu
->call_site_htab
;
8089 if (dwarf2_per_objfile
->using_index
)
8090 per_cu
->v
.quick
->compunit_symtab
= cust
;
8093 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8094 pst
->compunit_symtab
= cust
;
8098 /* Push it for inclusion processing later. */
8099 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8101 do_cleanups (back_to
);
8104 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8105 already been loaded into memory. */
8108 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8109 enum language pretend_language
)
8111 struct dwarf2_cu
*cu
= per_cu
->cu
;
8112 struct objfile
*objfile
= per_cu
->objfile
;
8113 struct compunit_symtab
*cust
;
8114 struct cleanup
*back_to
, *delayed_list_cleanup
;
8115 struct signatured_type
*sig_type
;
8117 gdb_assert (per_cu
->is_debug_types
);
8118 sig_type
= (struct signatured_type
*) per_cu
;
8121 back_to
= make_cleanup (really_free_pendings
, NULL
);
8122 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8124 cu
->list_in_scope
= &file_symbols
;
8126 cu
->language
= pretend_language
;
8127 cu
->language_defn
= language_def (cu
->language
);
8129 /* The symbol tables are set up in read_type_unit_scope. */
8130 process_die (cu
->dies
, cu
);
8132 /* For now fudge the Go package. */
8133 if (cu
->language
== language_go
)
8134 fixup_go_packaging (cu
);
8136 /* Now that we have processed all the DIEs in the CU, all the types
8137 should be complete, and it should now be safe to compute all of the
8139 compute_delayed_physnames (cu
);
8140 do_cleanups (delayed_list_cleanup
);
8142 /* TUs share symbol tables.
8143 If this is the first TU to use this symtab, complete the construction
8144 of it with end_expandable_symtab. Otherwise, complete the addition of
8145 this TU's symbols to the existing symtab. */
8146 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8148 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8149 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8153 /* Set symtab language to language from DW_AT_language. If the
8154 compilation is from a C file generated by language preprocessors,
8155 do not set the language if it was already deduced by
8157 if (!(cu
->language
== language_c
8158 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8159 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8164 augment_type_symtab ();
8165 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8168 if (dwarf2_per_objfile
->using_index
)
8169 per_cu
->v
.quick
->compunit_symtab
= cust
;
8172 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8173 pst
->compunit_symtab
= cust
;
8177 do_cleanups (back_to
);
8180 /* Process an imported unit DIE. */
8183 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8185 struct attribute
*attr
;
8187 /* For now we don't handle imported units in type units. */
8188 if (cu
->per_cu
->is_debug_types
)
8190 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8191 " supported in type units [in module %s]"),
8192 objfile_name (cu
->objfile
));
8195 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8198 struct dwarf2_per_cu_data
*per_cu
;
8199 struct symtab
*imported_symtab
;
8203 offset
= dwarf2_get_ref_die_offset (attr
);
8204 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8205 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8207 /* If necessary, add it to the queue and load its DIEs. */
8208 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8209 load_full_comp_unit (per_cu
, cu
->language
);
8211 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8216 /* Reset the in_process bit of a die. */
8219 reset_die_in_process (void *arg
)
8221 struct die_info
*die
= arg
;
8223 die
->in_process
= 0;
8226 /* Process a die and its children. */
8229 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8231 struct cleanup
*in_process
;
8233 /* We should only be processing those not already in process. */
8234 gdb_assert (!die
->in_process
);
8236 die
->in_process
= 1;
8237 in_process
= make_cleanup (reset_die_in_process
,die
);
8241 case DW_TAG_padding
:
8243 case DW_TAG_compile_unit
:
8244 case DW_TAG_partial_unit
:
8245 read_file_scope (die
, cu
);
8247 case DW_TAG_type_unit
:
8248 read_type_unit_scope (die
, cu
);
8250 case DW_TAG_subprogram
:
8251 case DW_TAG_inlined_subroutine
:
8252 read_func_scope (die
, cu
);
8254 case DW_TAG_lexical_block
:
8255 case DW_TAG_try_block
:
8256 case DW_TAG_catch_block
:
8257 read_lexical_block_scope (die
, cu
);
8259 case DW_TAG_GNU_call_site
:
8260 read_call_site_scope (die
, cu
);
8262 case DW_TAG_class_type
:
8263 case DW_TAG_interface_type
:
8264 case DW_TAG_structure_type
:
8265 case DW_TAG_union_type
:
8266 process_structure_scope (die
, cu
);
8268 case DW_TAG_enumeration_type
:
8269 process_enumeration_scope (die
, cu
);
8272 /* These dies have a type, but processing them does not create
8273 a symbol or recurse to process the children. Therefore we can
8274 read them on-demand through read_type_die. */
8275 case DW_TAG_subroutine_type
:
8276 case DW_TAG_set_type
:
8277 case DW_TAG_array_type
:
8278 case DW_TAG_pointer_type
:
8279 case DW_TAG_ptr_to_member_type
:
8280 case DW_TAG_reference_type
:
8281 case DW_TAG_string_type
:
8284 case DW_TAG_base_type
:
8285 case DW_TAG_subrange_type
:
8286 case DW_TAG_typedef
:
8287 /* Add a typedef symbol for the type definition, if it has a
8289 new_symbol (die
, read_type_die (die
, cu
), cu
);
8291 case DW_TAG_common_block
:
8292 read_common_block (die
, cu
);
8294 case DW_TAG_common_inclusion
:
8296 case DW_TAG_namespace
:
8297 cu
->processing_has_namespace_info
= 1;
8298 read_namespace (die
, cu
);
8301 cu
->processing_has_namespace_info
= 1;
8302 read_module (die
, cu
);
8304 case DW_TAG_imported_declaration
:
8305 cu
->processing_has_namespace_info
= 1;
8306 if (read_namespace_alias (die
, cu
))
8308 /* The declaration is not a global namespace alias: fall through. */
8309 case DW_TAG_imported_module
:
8310 cu
->processing_has_namespace_info
= 1;
8311 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8312 || cu
->language
!= language_fortran
))
8313 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8314 dwarf_tag_name (die
->tag
));
8315 read_import_statement (die
, cu
);
8318 case DW_TAG_imported_unit
:
8319 process_imported_unit_die (die
, cu
);
8323 new_symbol (die
, NULL
, cu
);
8327 do_cleanups (in_process
);
8330 /* DWARF name computation. */
8332 /* A helper function for dwarf2_compute_name which determines whether DIE
8333 needs to have the name of the scope prepended to the name listed in the
8337 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8339 struct attribute
*attr
;
8343 case DW_TAG_namespace
:
8344 case DW_TAG_typedef
:
8345 case DW_TAG_class_type
:
8346 case DW_TAG_interface_type
:
8347 case DW_TAG_structure_type
:
8348 case DW_TAG_union_type
:
8349 case DW_TAG_enumeration_type
:
8350 case DW_TAG_enumerator
:
8351 case DW_TAG_subprogram
:
8352 case DW_TAG_inlined_subroutine
:
8354 case DW_TAG_imported_declaration
:
8357 case DW_TAG_variable
:
8358 case DW_TAG_constant
:
8359 /* We only need to prefix "globally" visible variables. These include
8360 any variable marked with DW_AT_external or any variable that
8361 lives in a namespace. [Variables in anonymous namespaces
8362 require prefixing, but they are not DW_AT_external.] */
8364 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8366 struct dwarf2_cu
*spec_cu
= cu
;
8368 return die_needs_namespace (die_specification (die
, &spec_cu
),
8372 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8373 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8374 && die
->parent
->tag
!= DW_TAG_module
)
8376 /* A variable in a lexical block of some kind does not need a
8377 namespace, even though in C++ such variables may be external
8378 and have a mangled name. */
8379 if (die
->parent
->tag
== DW_TAG_lexical_block
8380 || die
->parent
->tag
== DW_TAG_try_block
8381 || die
->parent
->tag
== DW_TAG_catch_block
8382 || die
->parent
->tag
== DW_TAG_subprogram
)
8391 /* Retrieve the last character from a mem_file. */
8394 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8396 char *last_char_p
= (char *) object
;
8399 *last_char_p
= buffer
[length
- 1];
8402 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8403 compute the physname for the object, which include a method's:
8404 - formal parameters (C++/Java),
8405 - receiver type (Go),
8406 - return type (Java).
8408 The term "physname" is a bit confusing.
8409 For C++, for example, it is the demangled name.
8410 For Go, for example, it's the mangled name.
8412 For Ada, return the DIE's linkage name rather than the fully qualified
8413 name. PHYSNAME is ignored..
8415 The result is allocated on the objfile_obstack and canonicalized. */
8418 dwarf2_compute_name (const char *name
,
8419 struct die_info
*die
, struct dwarf2_cu
*cu
,
8422 struct objfile
*objfile
= cu
->objfile
;
8425 name
= dwarf2_name (die
, cu
);
8427 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8428 but otherwise compute it by typename_concat inside GDB.
8429 FIXME: Actually this is not really true, or at least not always true.
8430 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8431 Fortran names because there is no mangling standard. So new_symbol_full
8432 will set the demangled name to the result of dwarf2_full_name, and it is
8433 the demangled name that GDB uses if it exists. */
8434 if (cu
->language
== language_ada
8435 || (cu
->language
== language_fortran
&& physname
))
8437 /* For Ada unit, we prefer the linkage name over the name, as
8438 the former contains the exported name, which the user expects
8439 to be able to reference. Ideally, we want the user to be able
8440 to reference this entity using either natural or linkage name,
8441 but we haven't started looking at this enhancement yet. */
8442 const char *linkage_name
;
8444 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8445 if (linkage_name
== NULL
)
8446 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8447 if (linkage_name
!= NULL
)
8448 return linkage_name
;
8451 /* These are the only languages we know how to qualify names in. */
8453 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8454 || cu
->language
== language_fortran
|| cu
->language
== language_d
))
8456 if (die_needs_namespace (die
, cu
))
8460 struct ui_file
*buf
;
8461 char *intermediate_name
;
8462 const char *canonical_name
= NULL
;
8464 prefix
= determine_prefix (die
, cu
);
8465 buf
= mem_fileopen ();
8466 if (*prefix
!= '\0')
8468 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8471 fputs_unfiltered (prefixed_name
, buf
);
8472 xfree (prefixed_name
);
8475 fputs_unfiltered (name
, buf
);
8477 /* Template parameters may be specified in the DIE's DW_AT_name, or
8478 as children with DW_TAG_template_type_param or
8479 DW_TAG_value_type_param. If the latter, add them to the name
8480 here. If the name already has template parameters, then
8481 skip this step; some versions of GCC emit both, and
8482 it is more efficient to use the pre-computed name.
8484 Something to keep in mind about this process: it is very
8485 unlikely, or in some cases downright impossible, to produce
8486 something that will match the mangled name of a function.
8487 If the definition of the function has the same debug info,
8488 we should be able to match up with it anyway. But fallbacks
8489 using the minimal symbol, for instance to find a method
8490 implemented in a stripped copy of libstdc++, will not work.
8491 If we do not have debug info for the definition, we will have to
8492 match them up some other way.
8494 When we do name matching there is a related problem with function
8495 templates; two instantiated function templates are allowed to
8496 differ only by their return types, which we do not add here. */
8498 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8500 struct attribute
*attr
;
8501 struct die_info
*child
;
8504 die
->building_fullname
= 1;
8506 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8510 const gdb_byte
*bytes
;
8511 struct dwarf2_locexpr_baton
*baton
;
8514 if (child
->tag
!= DW_TAG_template_type_param
8515 && child
->tag
!= DW_TAG_template_value_param
)
8520 fputs_unfiltered ("<", buf
);
8524 fputs_unfiltered (", ", buf
);
8526 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8529 complaint (&symfile_complaints
,
8530 _("template parameter missing DW_AT_type"));
8531 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8534 type
= die_type (child
, cu
);
8536 if (child
->tag
== DW_TAG_template_type_param
)
8538 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8542 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8545 complaint (&symfile_complaints
,
8546 _("template parameter missing "
8547 "DW_AT_const_value"));
8548 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8552 dwarf2_const_value_attr (attr
, type
, name
,
8553 &cu
->comp_unit_obstack
, cu
,
8554 &value
, &bytes
, &baton
);
8556 if (TYPE_NOSIGN (type
))
8557 /* GDB prints characters as NUMBER 'CHAR'. If that's
8558 changed, this can use value_print instead. */
8559 c_printchar (value
, type
, buf
);
8562 struct value_print_options opts
;
8565 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8569 else if (bytes
!= NULL
)
8571 v
= allocate_value (type
);
8572 memcpy (value_contents_writeable (v
), bytes
,
8573 TYPE_LENGTH (type
));
8576 v
= value_from_longest (type
, value
);
8578 /* Specify decimal so that we do not depend on
8580 get_formatted_print_options (&opts
, 'd');
8582 value_print (v
, buf
, &opts
);
8588 die
->building_fullname
= 0;
8592 /* Close the argument list, with a space if necessary
8593 (nested templates). */
8594 char last_char
= '\0';
8595 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8596 if (last_char
== '>')
8597 fputs_unfiltered (" >", buf
);
8599 fputs_unfiltered (">", buf
);
8603 /* For Java and C++ methods, append formal parameter type
8604 information, if PHYSNAME. */
8606 if (physname
&& die
->tag
== DW_TAG_subprogram
8607 && (cu
->language
== language_cplus
8608 || cu
->language
== language_java
))
8610 struct type
*type
= read_type_die (die
, cu
);
8612 c_type_print_args (type
, buf
, 1, cu
->language
,
8613 &type_print_raw_options
);
8615 if (cu
->language
== language_java
)
8617 /* For java, we must append the return type to method
8619 if (die
->tag
== DW_TAG_subprogram
)
8620 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8621 0, 0, &type_print_raw_options
);
8623 else if (cu
->language
== language_cplus
)
8625 /* Assume that an artificial first parameter is
8626 "this", but do not crash if it is not. RealView
8627 marks unnamed (and thus unused) parameters as
8628 artificial; there is no way to differentiate
8630 if (TYPE_NFIELDS (type
) > 0
8631 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8632 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8633 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8635 fputs_unfiltered (" const", buf
);
8639 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8640 ui_file_delete (buf
);
8642 if (cu
->language
== language_cplus
)
8644 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8645 &objfile
->per_bfd
->storage_obstack
);
8647 /* If we only computed INTERMEDIATE_NAME, or if
8648 INTERMEDIATE_NAME is already canonical, then we need to
8649 copy it to the appropriate obstack. */
8650 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8651 name
= ((const char *)
8652 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8654 strlen (intermediate_name
)));
8656 name
= canonical_name
;
8658 xfree (intermediate_name
);
8665 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8666 If scope qualifiers are appropriate they will be added. The result
8667 will be allocated on the storage_obstack, or NULL if the DIE does
8668 not have a name. NAME may either be from a previous call to
8669 dwarf2_name or NULL.
8671 The output string will be canonicalized (if C++/Java). */
8674 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8676 return dwarf2_compute_name (name
, die
, cu
, 0);
8679 /* Construct a physname for the given DIE in CU. NAME may either be
8680 from a previous call to dwarf2_name or NULL. The result will be
8681 allocated on the objfile_objstack or NULL if the DIE does not have a
8684 The output string will be canonicalized (if C++/Java). */
8687 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8689 struct objfile
*objfile
= cu
->objfile
;
8690 struct attribute
*attr
;
8691 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8692 struct cleanup
*back_to
;
8695 /* In this case dwarf2_compute_name is just a shortcut not building anything
8697 if (!die_needs_namespace (die
, cu
))
8698 return dwarf2_compute_name (name
, die
, cu
, 1);
8700 back_to
= make_cleanup (null_cleanup
, NULL
);
8702 mangled
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8703 if (mangled
== NULL
)
8704 mangled
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8706 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8708 if (mangled
!= NULL
)
8712 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8713 type. It is easier for GDB users to search for such functions as
8714 `name(params)' than `long name(params)'. In such case the minimal
8715 symbol names do not match the full symbol names but for template
8716 functions there is never a need to look up their definition from their
8717 declaration so the only disadvantage remains the minimal symbol
8718 variant `long name(params)' does not have the proper inferior type.
8721 if (cu
->language
== language_go
)
8723 /* This is a lie, but we already lie to the caller new_symbol_full.
8724 new_symbol_full assumes we return the mangled name.
8725 This just undoes that lie until things are cleaned up. */
8730 demangled
= gdb_demangle (mangled
,
8731 (DMGL_PARAMS
| DMGL_ANSI
8732 | (cu
->language
== language_java
8733 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8738 make_cleanup (xfree
, demangled
);
8748 if (canon
== NULL
|| check_physname
)
8750 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8752 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8754 /* It may not mean a bug in GDB. The compiler could also
8755 compute DW_AT_linkage_name incorrectly. But in such case
8756 GDB would need to be bug-to-bug compatible. */
8758 complaint (&symfile_complaints
,
8759 _("Computed physname <%s> does not match demangled <%s> "
8760 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8761 physname
, canon
, mangled
, die
->offset
.sect_off
,
8762 objfile_name (objfile
));
8764 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8765 is available here - over computed PHYSNAME. It is safer
8766 against both buggy GDB and buggy compilers. */
8780 retval
= ((const char *)
8781 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8782 retval
, strlen (retval
)));
8784 do_cleanups (back_to
);
8788 /* Inspect DIE in CU for a namespace alias. If one exists, record
8789 a new symbol for it.
8791 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8794 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8796 struct attribute
*attr
;
8798 /* If the die does not have a name, this is not a namespace
8800 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8804 struct die_info
*d
= die
;
8805 struct dwarf2_cu
*imported_cu
= cu
;
8807 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8808 keep inspecting DIEs until we hit the underlying import. */
8809 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8810 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8812 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8816 d
= follow_die_ref (d
, attr
, &imported_cu
);
8817 if (d
->tag
!= DW_TAG_imported_declaration
)
8821 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8823 complaint (&symfile_complaints
,
8824 _("DIE at 0x%x has too many recursively imported "
8825 "declarations"), d
->offset
.sect_off
);
8832 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8834 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8835 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8837 /* This declaration is a global namespace alias. Add
8838 a symbol for it whose type is the aliased namespace. */
8839 new_symbol (die
, type
, cu
);
8848 /* Return the using directives repository (global or local?) to use in the
8849 current context for LANGUAGE.
8851 For Ada, imported declarations can materialize renamings, which *may* be
8852 global. However it is impossible (for now?) in DWARF to distinguish
8853 "external" imported declarations and "static" ones. As all imported
8854 declarations seem to be static in all other languages, make them all CU-wide
8855 global only in Ada. */
8857 static struct using_direct
**
8858 using_directives (enum language language
)
8860 if (language
== language_ada
&& context_stack_depth
== 0)
8861 return &global_using_directives
;
8863 return &local_using_directives
;
8866 /* Read the import statement specified by the given die and record it. */
8869 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8871 struct objfile
*objfile
= cu
->objfile
;
8872 struct attribute
*import_attr
;
8873 struct die_info
*imported_die
, *child_die
;
8874 struct dwarf2_cu
*imported_cu
;
8875 const char *imported_name
;
8876 const char *imported_name_prefix
;
8877 const char *canonical_name
;
8878 const char *import_alias
;
8879 const char *imported_declaration
= NULL
;
8880 const char *import_prefix
;
8881 VEC (const_char_ptr
) *excludes
= NULL
;
8882 struct cleanup
*cleanups
;
8884 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8885 if (import_attr
== NULL
)
8887 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8888 dwarf_tag_name (die
->tag
));
8893 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8894 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8895 if (imported_name
== NULL
)
8897 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8899 The import in the following code:
8913 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8914 <52> DW_AT_decl_file : 1
8915 <53> DW_AT_decl_line : 6
8916 <54> DW_AT_import : <0x75>
8917 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8919 <5b> DW_AT_decl_file : 1
8920 <5c> DW_AT_decl_line : 2
8921 <5d> DW_AT_type : <0x6e>
8923 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8924 <76> DW_AT_byte_size : 4
8925 <77> DW_AT_encoding : 5 (signed)
8927 imports the wrong die ( 0x75 instead of 0x58 ).
8928 This case will be ignored until the gcc bug is fixed. */
8932 /* Figure out the local name after import. */
8933 import_alias
= dwarf2_name (die
, cu
);
8935 /* Figure out where the statement is being imported to. */
8936 import_prefix
= determine_prefix (die
, cu
);
8938 /* Figure out what the scope of the imported die is and prepend it
8939 to the name of the imported die. */
8940 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8942 if (imported_die
->tag
!= DW_TAG_namespace
8943 && imported_die
->tag
!= DW_TAG_module
)
8945 imported_declaration
= imported_name
;
8946 canonical_name
= imported_name_prefix
;
8948 else if (strlen (imported_name_prefix
) > 0)
8949 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8950 imported_name_prefix
,
8951 (cu
->language
== language_d
? "." : "::"),
8952 imported_name
, (char *) NULL
);
8954 canonical_name
= imported_name
;
8956 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8958 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8959 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8960 child_die
= sibling_die (child_die
))
8962 /* DWARF-4: A Fortran use statement with a “rename list” may be
8963 represented by an imported module entry with an import attribute
8964 referring to the module and owned entries corresponding to those
8965 entities that are renamed as part of being imported. */
8967 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8969 complaint (&symfile_complaints
,
8970 _("child DW_TAG_imported_declaration expected "
8971 "- DIE at 0x%x [in module %s]"),
8972 child_die
->offset
.sect_off
, objfile_name (objfile
));
8976 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8977 if (import_attr
== NULL
)
8979 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8980 dwarf_tag_name (child_die
->tag
));
8985 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8987 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8988 if (imported_name
== NULL
)
8990 complaint (&symfile_complaints
,
8991 _("child DW_TAG_imported_declaration has unknown "
8992 "imported name - DIE at 0x%x [in module %s]"),
8993 child_die
->offset
.sect_off
, objfile_name (objfile
));
8997 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
8999 process_die (child_die
, cu
);
9002 add_using_directive (using_directives (cu
->language
),
9006 imported_declaration
,
9009 &objfile
->objfile_obstack
);
9011 do_cleanups (cleanups
);
9014 /* Cleanup function for handle_DW_AT_stmt_list. */
9017 free_cu_line_header (void *arg
)
9019 struct dwarf2_cu
*cu
= arg
;
9021 free_line_header (cu
->line_header
);
9022 cu
->line_header
= NULL
;
9025 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9026 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9027 this, it was first present in GCC release 4.3.0. */
9030 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9032 if (!cu
->checked_producer
)
9033 check_producer (cu
);
9035 return cu
->producer_is_gcc_lt_4_3
;
9039 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9040 const char **name
, const char **comp_dir
)
9042 /* Find the filename. Do not use dwarf2_name here, since the filename
9043 is not a source language identifier. */
9044 *name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9045 *comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9047 if (*comp_dir
== NULL
9048 && producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9049 && IS_ABSOLUTE_PATH (*name
))
9051 char *d
= ldirname (*name
);
9055 make_cleanup (xfree
, d
);
9057 if (*comp_dir
!= NULL
)
9059 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9060 directory, get rid of it. */
9061 char *cp
= strchr (*comp_dir
, ':');
9063 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9068 *name
= "<unknown>";
9071 /* Handle DW_AT_stmt_list for a compilation unit.
9072 DIE is the DW_TAG_compile_unit die for CU.
9073 COMP_DIR is the compilation directory. LOWPC is passed to
9074 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9077 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9078 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9080 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9081 struct attribute
*attr
;
9082 unsigned int line_offset
;
9083 struct line_header line_header_local
;
9084 hashval_t line_header_local_hash
;
9089 gdb_assert (! cu
->per_cu
->is_debug_types
);
9091 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9095 line_offset
= DW_UNSND (attr
);
9097 /* The line header hash table is only created if needed (it exists to
9098 prevent redundant reading of the line table for partial_units).
9099 If we're given a partial_unit, we'll need it. If we're given a
9100 compile_unit, then use the line header hash table if it's already
9101 created, but don't create one just yet. */
9103 if (dwarf2_per_objfile
->line_header_hash
== NULL
9104 && die
->tag
== DW_TAG_partial_unit
)
9106 dwarf2_per_objfile
->line_header_hash
9107 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9108 line_header_eq_voidp
,
9109 free_line_header_voidp
,
9110 &objfile
->objfile_obstack
,
9111 hashtab_obstack_allocate
,
9112 dummy_obstack_deallocate
);
9115 line_header_local
.offset
.sect_off
= line_offset
;
9116 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9117 line_header_local_hash
= line_header_hash (&line_header_local
);
9118 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9120 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9122 line_header_local_hash
, NO_INSERT
);
9124 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9125 is not present in *SLOT (since if there is something in *SLOT then
9126 it will be for a partial_unit). */
9127 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9129 gdb_assert (*slot
!= NULL
);
9130 cu
->line_header
= *slot
;
9135 /* dwarf_decode_line_header does not yet provide sufficient information.
9136 We always have to call also dwarf_decode_lines for it. */
9137 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9138 if (cu
->line_header
== NULL
)
9141 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9145 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9147 line_header_local_hash
, INSERT
);
9148 gdb_assert (slot
!= NULL
);
9150 if (slot
!= NULL
&& *slot
== NULL
)
9152 /* This newly decoded line number information unit will be owned
9153 by line_header_hash hash table. */
9154 *slot
= cu
->line_header
;
9158 /* We cannot free any current entry in (*slot) as that struct line_header
9159 may be already used by multiple CUs. Create only temporary decoded
9160 line_header for this CU - it may happen at most once for each line
9161 number information unit. And if we're not using line_header_hash
9162 then this is what we want as well. */
9163 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9164 make_cleanup (free_cu_line_header
, cu
);
9166 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9167 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9171 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9174 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9176 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9177 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9178 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9179 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9180 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9181 struct attribute
*attr
;
9182 const char *name
= NULL
;
9183 const char *comp_dir
= NULL
;
9184 struct die_info
*child_die
;
9185 bfd
*abfd
= objfile
->obfd
;
9188 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9190 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9192 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9193 from finish_block. */
9194 if (lowpc
== ((CORE_ADDR
) -1))
9196 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9198 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9200 prepare_one_comp_unit (cu
, die
, cu
->language
);
9202 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9203 standardised yet. As a workaround for the language detection we fall
9204 back to the DW_AT_producer string. */
9205 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9206 cu
->language
= language_opencl
;
9208 /* Similar hack for Go. */
9209 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9210 set_cu_language (DW_LANG_Go
, cu
);
9212 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9214 /* Decode line number information if present. We do this before
9215 processing child DIEs, so that the line header table is available
9216 for DW_AT_decl_file. */
9217 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9219 /* Process all dies in compilation unit. */
9220 if (die
->child
!= NULL
)
9222 child_die
= die
->child
;
9223 while (child_die
&& child_die
->tag
)
9225 process_die (child_die
, cu
);
9226 child_die
= sibling_die (child_die
);
9230 /* Decode macro information, if present. Dwarf 2 macro information
9231 refers to information in the line number info statement program
9232 header, so we can only read it if we've read the header
9234 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9235 if (attr
&& cu
->line_header
)
9237 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9238 complaint (&symfile_complaints
,
9239 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9241 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9245 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9246 if (attr
&& cu
->line_header
)
9248 unsigned int macro_offset
= DW_UNSND (attr
);
9250 dwarf_decode_macros (cu
, macro_offset
, 0);
9254 do_cleanups (back_to
);
9257 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9258 Create the set of symtabs used by this TU, or if this TU is sharing
9259 symtabs with another TU and the symtabs have already been created
9260 then restore those symtabs in the line header.
9261 We don't need the pc/line-number mapping for type units. */
9264 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9266 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9267 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9268 struct type_unit_group
*tu_group
;
9270 struct line_header
*lh
;
9271 struct attribute
*attr
;
9272 unsigned int i
, line_offset
;
9273 struct signatured_type
*sig_type
;
9275 gdb_assert (per_cu
->is_debug_types
);
9276 sig_type
= (struct signatured_type
*) per_cu
;
9278 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9280 /* If we're using .gdb_index (includes -readnow) then
9281 per_cu->type_unit_group may not have been set up yet. */
9282 if (sig_type
->type_unit_group
== NULL
)
9283 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9284 tu_group
= sig_type
->type_unit_group
;
9286 /* If we've already processed this stmt_list there's no real need to
9287 do it again, we could fake it and just recreate the part we need
9288 (file name,index -> symtab mapping). If data shows this optimization
9289 is useful we can do it then. */
9290 first_time
= tu_group
->compunit_symtab
== NULL
;
9292 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9297 line_offset
= DW_UNSND (attr
);
9298 lh
= dwarf_decode_line_header (line_offset
, cu
);
9303 dwarf2_start_symtab (cu
, "", NULL
, 0);
9306 gdb_assert (tu_group
->symtabs
== NULL
);
9307 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9312 cu
->line_header
= lh
;
9313 make_cleanup (free_cu_line_header
, cu
);
9317 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9319 tu_group
->num_symtabs
= lh
->num_file_names
;
9320 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9322 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9324 const char *dir
= NULL
;
9325 struct file_entry
*fe
= &lh
->file_names
[i
];
9327 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
9328 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9329 dwarf2_start_subfile (fe
->name
, dir
);
9331 if (current_subfile
->symtab
== NULL
)
9333 /* NOTE: start_subfile will recognize when it's been passed
9334 a file it has already seen. So we can't assume there's a
9335 simple mapping from lh->file_names to subfiles, plus
9336 lh->file_names may contain dups. */
9337 current_subfile
->symtab
9338 = allocate_symtab (cust
, current_subfile
->name
);
9341 fe
->symtab
= current_subfile
->symtab
;
9342 tu_group
->symtabs
[i
] = fe
->symtab
;
9347 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9349 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9351 struct file_entry
*fe
= &lh
->file_names
[i
];
9353 fe
->symtab
= tu_group
->symtabs
[i
];
9357 /* The main symtab is allocated last. Type units don't have DW_AT_name
9358 so they don't have a "real" (so to speak) symtab anyway.
9359 There is later code that will assign the main symtab to all symbols
9360 that don't have one. We need to handle the case of a symbol with a
9361 missing symtab (DW_AT_decl_file) anyway. */
9364 /* Process DW_TAG_type_unit.
9365 For TUs we want to skip the first top level sibling if it's not the
9366 actual type being defined by this TU. In this case the first top
9367 level sibling is there to provide context only. */
9370 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9372 struct die_info
*child_die
;
9374 prepare_one_comp_unit (cu
, die
, language_minimal
);
9376 /* Initialize (or reinitialize) the machinery for building symtabs.
9377 We do this before processing child DIEs, so that the line header table
9378 is available for DW_AT_decl_file. */
9379 setup_type_unit_groups (die
, cu
);
9381 if (die
->child
!= NULL
)
9383 child_die
= die
->child
;
9384 while (child_die
&& child_die
->tag
)
9386 process_die (child_die
, cu
);
9387 child_die
= sibling_die (child_die
);
9394 http://gcc.gnu.org/wiki/DebugFission
9395 http://gcc.gnu.org/wiki/DebugFissionDWP
9397 To simplify handling of both DWO files ("object" files with the DWARF info)
9398 and DWP files (a file with the DWOs packaged up into one file), we treat
9399 DWP files as having a collection of virtual DWO files. */
9402 hash_dwo_file (const void *item
)
9404 const struct dwo_file
*dwo_file
= item
;
9407 hash
= htab_hash_string (dwo_file
->dwo_name
);
9408 if (dwo_file
->comp_dir
!= NULL
)
9409 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9414 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9416 const struct dwo_file
*lhs
= item_lhs
;
9417 const struct dwo_file
*rhs
= item_rhs
;
9419 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9421 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9422 return lhs
->comp_dir
== rhs
->comp_dir
;
9423 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9426 /* Allocate a hash table for DWO files. */
9429 allocate_dwo_file_hash_table (void)
9431 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9433 return htab_create_alloc_ex (41,
9437 &objfile
->objfile_obstack
,
9438 hashtab_obstack_allocate
,
9439 dummy_obstack_deallocate
);
9442 /* Lookup DWO file DWO_NAME. */
9445 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9447 struct dwo_file find_entry
;
9450 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9451 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9453 memset (&find_entry
, 0, sizeof (find_entry
));
9454 find_entry
.dwo_name
= dwo_name
;
9455 find_entry
.comp_dir
= comp_dir
;
9456 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9462 hash_dwo_unit (const void *item
)
9464 const struct dwo_unit
*dwo_unit
= item
;
9466 /* This drops the top 32 bits of the id, but is ok for a hash. */
9467 return dwo_unit
->signature
;
9471 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9473 const struct dwo_unit
*lhs
= item_lhs
;
9474 const struct dwo_unit
*rhs
= item_rhs
;
9476 /* The signature is assumed to be unique within the DWO file.
9477 So while object file CU dwo_id's always have the value zero,
9478 that's OK, assuming each object file DWO file has only one CU,
9479 and that's the rule for now. */
9480 return lhs
->signature
== rhs
->signature
;
9483 /* Allocate a hash table for DWO CUs,TUs.
9484 There is one of these tables for each of CUs,TUs for each DWO file. */
9487 allocate_dwo_unit_table (struct objfile
*objfile
)
9489 /* Start out with a pretty small number.
9490 Generally DWO files contain only one CU and maybe some TUs. */
9491 return htab_create_alloc_ex (3,
9495 &objfile
->objfile_obstack
,
9496 hashtab_obstack_allocate
,
9497 dummy_obstack_deallocate
);
9500 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9502 struct create_dwo_cu_data
9504 struct dwo_file
*dwo_file
;
9505 struct dwo_unit dwo_unit
;
9508 /* die_reader_func for create_dwo_cu. */
9511 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9512 const gdb_byte
*info_ptr
,
9513 struct die_info
*comp_unit_die
,
9517 struct dwarf2_cu
*cu
= reader
->cu
;
9518 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9519 sect_offset offset
= cu
->per_cu
->offset
;
9520 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9521 struct create_dwo_cu_data
*data
= datap
;
9522 struct dwo_file
*dwo_file
= data
->dwo_file
;
9523 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9524 struct attribute
*attr
;
9526 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9529 complaint (&symfile_complaints
,
9530 _("Dwarf Error: debug entry at offset 0x%x is missing"
9531 " its dwo_id [in module %s]"),
9532 offset
.sect_off
, dwo_file
->dwo_name
);
9536 dwo_unit
->dwo_file
= dwo_file
;
9537 dwo_unit
->signature
= DW_UNSND (attr
);
9538 dwo_unit
->section
= section
;
9539 dwo_unit
->offset
= offset
;
9540 dwo_unit
->length
= cu
->per_cu
->length
;
9542 if (dwarf_read_debug
)
9543 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9544 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9547 /* Create the dwo_unit for the lone CU in DWO_FILE.
9548 Note: This function processes DWO files only, not DWP files. */
9550 static struct dwo_unit
*
9551 create_dwo_cu (struct dwo_file
*dwo_file
)
9553 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9554 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9557 const gdb_byte
*info_ptr
, *end_ptr
;
9558 struct create_dwo_cu_data create_dwo_cu_data
;
9559 struct dwo_unit
*dwo_unit
;
9561 dwarf2_read_section (objfile
, section
);
9562 info_ptr
= section
->buffer
;
9564 if (info_ptr
== NULL
)
9567 /* We can't set abfd until now because the section may be empty or
9568 not present, in which case section->asection will be NULL. */
9569 abfd
= get_section_bfd_owner (section
);
9571 if (dwarf_read_debug
)
9573 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9574 get_section_name (section
),
9575 get_section_file_name (section
));
9578 create_dwo_cu_data
.dwo_file
= dwo_file
;
9581 end_ptr
= info_ptr
+ section
->size
;
9582 while (info_ptr
< end_ptr
)
9584 struct dwarf2_per_cu_data per_cu
;
9586 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9587 sizeof (create_dwo_cu_data
.dwo_unit
));
9588 memset (&per_cu
, 0, sizeof (per_cu
));
9589 per_cu
.objfile
= objfile
;
9590 per_cu
.is_debug_types
= 0;
9591 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9592 per_cu
.section
= section
;
9594 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9595 create_dwo_cu_reader
,
9596 &create_dwo_cu_data
);
9598 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9600 /* If we've already found one, complain. We only support one
9601 because having more than one requires hacking the dwo_name of
9602 each to match, which is highly unlikely to happen. */
9603 if (dwo_unit
!= NULL
)
9605 complaint (&symfile_complaints
,
9606 _("Multiple CUs in DWO file %s [in module %s]"),
9607 dwo_file
->dwo_name
, objfile_name (objfile
));
9611 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9612 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9615 info_ptr
+= per_cu
.length
;
9621 /* DWP file .debug_{cu,tu}_index section format:
9622 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9626 Both index sections have the same format, and serve to map a 64-bit
9627 signature to a set of section numbers. Each section begins with a header,
9628 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9629 indexes, and a pool of 32-bit section numbers. The index sections will be
9630 aligned at 8-byte boundaries in the file.
9632 The index section header consists of:
9634 V, 32 bit version number
9636 N, 32 bit number of compilation units or type units in the index
9637 M, 32 bit number of slots in the hash table
9639 Numbers are recorded using the byte order of the application binary.
9641 The hash table begins at offset 16 in the section, and consists of an array
9642 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9643 order of the application binary). Unused slots in the hash table are 0.
9644 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9646 The parallel table begins immediately after the hash table
9647 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9648 array of 32-bit indexes (using the byte order of the application binary),
9649 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9650 table contains a 32-bit index into the pool of section numbers. For unused
9651 hash table slots, the corresponding entry in the parallel table will be 0.
9653 The pool of section numbers begins immediately following the hash table
9654 (at offset 16 + 12 * M from the beginning of the section). The pool of
9655 section numbers consists of an array of 32-bit words (using the byte order
9656 of the application binary). Each item in the array is indexed starting
9657 from 0. The hash table entry provides the index of the first section
9658 number in the set. Additional section numbers in the set follow, and the
9659 set is terminated by a 0 entry (section number 0 is not used in ELF).
9661 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9662 section must be the first entry in the set, and the .debug_abbrev.dwo must
9663 be the second entry. Other members of the set may follow in any order.
9669 DWP Version 2 combines all the .debug_info, etc. sections into one,
9670 and the entries in the index tables are now offsets into these sections.
9671 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9674 Index Section Contents:
9676 Hash Table of Signatures dwp_hash_table.hash_table
9677 Parallel Table of Indices dwp_hash_table.unit_table
9678 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9679 Table of Section Sizes dwp_hash_table.v2.sizes
9681 The index section header consists of:
9683 V, 32 bit version number
9684 L, 32 bit number of columns in the table of section offsets
9685 N, 32 bit number of compilation units or type units in the index
9686 M, 32 bit number of slots in the hash table
9688 Numbers are recorded using the byte order of the application binary.
9690 The hash table has the same format as version 1.
9691 The parallel table of indices has the same format as version 1,
9692 except that the entries are origin-1 indices into the table of sections
9693 offsets and the table of section sizes.
9695 The table of offsets begins immediately following the parallel table
9696 (at offset 16 + 12 * M from the beginning of the section). The table is
9697 a two-dimensional array of 32-bit words (using the byte order of the
9698 application binary), with L columns and N+1 rows, in row-major order.
9699 Each row in the array is indexed starting from 0. The first row provides
9700 a key to the remaining rows: each column in this row provides an identifier
9701 for a debug section, and the offsets in the same column of subsequent rows
9702 refer to that section. The section identifiers are:
9704 DW_SECT_INFO 1 .debug_info.dwo
9705 DW_SECT_TYPES 2 .debug_types.dwo
9706 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9707 DW_SECT_LINE 4 .debug_line.dwo
9708 DW_SECT_LOC 5 .debug_loc.dwo
9709 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9710 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9711 DW_SECT_MACRO 8 .debug_macro.dwo
9713 The offsets provided by the CU and TU index sections are the base offsets
9714 for the contributions made by each CU or TU to the corresponding section
9715 in the package file. Each CU and TU header contains an abbrev_offset
9716 field, used to find the abbreviations table for that CU or TU within the
9717 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9718 be interpreted as relative to the base offset given in the index section.
9719 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9720 should be interpreted as relative to the base offset for .debug_line.dwo,
9721 and offsets into other debug sections obtained from DWARF attributes should
9722 also be interpreted as relative to the corresponding base offset.
9724 The table of sizes begins immediately following the table of offsets.
9725 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9726 with L columns and N rows, in row-major order. Each row in the array is
9727 indexed starting from 1 (row 0 is shared by the two tables).
9731 Hash table lookup is handled the same in version 1 and 2:
9733 We assume that N and M will not exceed 2^32 - 1.
9734 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9736 Given a 64-bit compilation unit signature or a type signature S, an entry
9737 in the hash table is located as follows:
9739 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9740 the low-order k bits all set to 1.
9742 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9744 3) If the hash table entry at index H matches the signature, use that
9745 entry. If the hash table entry at index H is unused (all zeroes),
9746 terminate the search: the signature is not present in the table.
9748 4) Let H = (H + H') modulo M. Repeat at Step 3.
9750 Because M > N and H' and M are relatively prime, the search is guaranteed
9751 to stop at an unused slot or find the match. */
9753 /* Create a hash table to map DWO IDs to their CU/TU entry in
9754 .debug_{info,types}.dwo in DWP_FILE.
9755 Returns NULL if there isn't one.
9756 Note: This function processes DWP files only, not DWO files. */
9758 static struct dwp_hash_table
*
9759 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9761 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9762 bfd
*dbfd
= dwp_file
->dbfd
;
9763 const gdb_byte
*index_ptr
, *index_end
;
9764 struct dwarf2_section_info
*index
;
9765 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9766 struct dwp_hash_table
*htab
;
9769 index
= &dwp_file
->sections
.tu_index
;
9771 index
= &dwp_file
->sections
.cu_index
;
9773 if (dwarf2_section_empty_p (index
))
9775 dwarf2_read_section (objfile
, index
);
9777 index_ptr
= index
->buffer
;
9778 index_end
= index_ptr
+ index
->size
;
9780 version
= read_4_bytes (dbfd
, index_ptr
);
9783 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9787 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9789 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9792 if (version
!= 1 && version
!= 2)
9794 error (_("Dwarf Error: unsupported DWP file version (%s)"
9796 pulongest (version
), dwp_file
->name
);
9798 if (nr_slots
!= (nr_slots
& -nr_slots
))
9800 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9801 " is not power of 2 [in module %s]"),
9802 pulongest (nr_slots
), dwp_file
->name
);
9805 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9806 htab
->version
= version
;
9807 htab
->nr_columns
= nr_columns
;
9808 htab
->nr_units
= nr_units
;
9809 htab
->nr_slots
= nr_slots
;
9810 htab
->hash_table
= index_ptr
;
9811 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9813 /* Exit early if the table is empty. */
9814 if (nr_slots
== 0 || nr_units
== 0
9815 || (version
== 2 && nr_columns
== 0))
9817 /* All must be zero. */
9818 if (nr_slots
!= 0 || nr_units
!= 0
9819 || (version
== 2 && nr_columns
!= 0))
9821 complaint (&symfile_complaints
,
9822 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9823 " all zero [in modules %s]"),
9831 htab
->section_pool
.v1
.indices
=
9832 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9833 /* It's harder to decide whether the section is too small in v1.
9834 V1 is deprecated anyway so we punt. */
9838 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9839 int *ids
= htab
->section_pool
.v2
.section_ids
;
9840 /* Reverse map for error checking. */
9841 int ids_seen
[DW_SECT_MAX
+ 1];
9846 error (_("Dwarf Error: bad DWP hash table, too few columns"
9847 " in section table [in module %s]"),
9850 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9852 error (_("Dwarf Error: bad DWP hash table, too many columns"
9853 " in section table [in module %s]"),
9856 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9857 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9858 for (i
= 0; i
< nr_columns
; ++i
)
9860 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9862 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9864 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9865 " in section table [in module %s]"),
9866 id
, dwp_file
->name
);
9868 if (ids_seen
[id
] != -1)
9870 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9871 " id %d in section table [in module %s]"),
9872 id
, dwp_file
->name
);
9877 /* Must have exactly one info or types section. */
9878 if (((ids_seen
[DW_SECT_INFO
] != -1)
9879 + (ids_seen
[DW_SECT_TYPES
] != -1))
9882 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9883 " DWO info/types section [in module %s]"),
9886 /* Must have an abbrev section. */
9887 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9889 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9890 " section [in module %s]"),
9893 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9894 htab
->section_pool
.v2
.sizes
=
9895 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9896 * nr_units
* nr_columns
);
9897 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9898 * nr_units
* nr_columns
))
9901 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9910 /* Update SECTIONS with the data from SECTP.
9912 This function is like the other "locate" section routines that are
9913 passed to bfd_map_over_sections, but in this context the sections to
9914 read comes from the DWP V1 hash table, not the full ELF section table.
9916 The result is non-zero for success, or zero if an error was found. */
9919 locate_v1_virtual_dwo_sections (asection
*sectp
,
9920 struct virtual_v1_dwo_sections
*sections
)
9922 const struct dwop_section_names
*names
= &dwop_section_names
;
9924 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9926 /* There can be only one. */
9927 if (sections
->abbrev
.s
.section
!= NULL
)
9929 sections
->abbrev
.s
.section
= sectp
;
9930 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9932 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9933 || section_is_p (sectp
->name
, &names
->types_dwo
))
9935 /* There can be only one. */
9936 if (sections
->info_or_types
.s
.section
!= NULL
)
9938 sections
->info_or_types
.s
.section
= sectp
;
9939 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9941 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9943 /* There can be only one. */
9944 if (sections
->line
.s
.section
!= NULL
)
9946 sections
->line
.s
.section
= sectp
;
9947 sections
->line
.size
= bfd_get_section_size (sectp
);
9949 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9951 /* There can be only one. */
9952 if (sections
->loc
.s
.section
!= NULL
)
9954 sections
->loc
.s
.section
= sectp
;
9955 sections
->loc
.size
= bfd_get_section_size (sectp
);
9957 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9959 /* There can be only one. */
9960 if (sections
->macinfo
.s
.section
!= NULL
)
9962 sections
->macinfo
.s
.section
= sectp
;
9963 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9965 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9967 /* There can be only one. */
9968 if (sections
->macro
.s
.section
!= NULL
)
9970 sections
->macro
.s
.section
= sectp
;
9971 sections
->macro
.size
= bfd_get_section_size (sectp
);
9973 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9975 /* There can be only one. */
9976 if (sections
->str_offsets
.s
.section
!= NULL
)
9978 sections
->str_offsets
.s
.section
= sectp
;
9979 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9983 /* No other kind of section is valid. */
9990 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9991 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9992 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9993 This is for DWP version 1 files. */
9995 static struct dwo_unit
*
9996 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
9997 uint32_t unit_index
,
9998 const char *comp_dir
,
9999 ULONGEST signature
, int is_debug_types
)
10001 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10002 const struct dwp_hash_table
*dwp_htab
=
10003 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10004 bfd
*dbfd
= dwp_file
->dbfd
;
10005 const char *kind
= is_debug_types
? "TU" : "CU";
10006 struct dwo_file
*dwo_file
;
10007 struct dwo_unit
*dwo_unit
;
10008 struct virtual_v1_dwo_sections sections
;
10009 void **dwo_file_slot
;
10010 char *virtual_dwo_name
;
10011 struct dwarf2_section_info
*cutu
;
10012 struct cleanup
*cleanups
;
10015 gdb_assert (dwp_file
->version
== 1);
10017 if (dwarf_read_debug
)
10019 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10021 pulongest (unit_index
), hex_string (signature
),
10025 /* Fetch the sections of this DWO unit.
10026 Put a limit on the number of sections we look for so that bad data
10027 doesn't cause us to loop forever. */
10029 #define MAX_NR_V1_DWO_SECTIONS \
10030 (1 /* .debug_info or .debug_types */ \
10031 + 1 /* .debug_abbrev */ \
10032 + 1 /* .debug_line */ \
10033 + 1 /* .debug_loc */ \
10034 + 1 /* .debug_str_offsets */ \
10035 + 1 /* .debug_macro or .debug_macinfo */ \
10036 + 1 /* trailing zero */)
10038 memset (§ions
, 0, sizeof (sections
));
10039 cleanups
= make_cleanup (null_cleanup
, 0);
10041 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10044 uint32_t section_nr
=
10045 read_4_bytes (dbfd
,
10046 dwp_htab
->section_pool
.v1
.indices
10047 + (unit_index
+ i
) * sizeof (uint32_t));
10049 if (section_nr
== 0)
10051 if (section_nr
>= dwp_file
->num_sections
)
10053 error (_("Dwarf Error: bad DWP hash table, section number too large"
10054 " [in module %s]"),
10058 sectp
= dwp_file
->elf_sections
[section_nr
];
10059 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10061 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10062 " [in module %s]"),
10068 || dwarf2_section_empty_p (§ions
.info_or_types
)
10069 || dwarf2_section_empty_p (§ions
.abbrev
))
10071 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10072 " [in module %s]"),
10075 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10077 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10078 " [in module %s]"),
10082 /* It's easier for the rest of the code if we fake a struct dwo_file and
10083 have dwo_unit "live" in that. At least for now.
10085 The DWP file can be made up of a random collection of CUs and TUs.
10086 However, for each CU + set of TUs that came from the same original DWO
10087 file, we can combine them back into a virtual DWO file to save space
10088 (fewer struct dwo_file objects to allocate). Remember that for really
10089 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10092 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10093 get_section_id (§ions
.abbrev
),
10094 get_section_id (§ions
.line
),
10095 get_section_id (§ions
.loc
),
10096 get_section_id (§ions
.str_offsets
));
10097 make_cleanup (xfree
, virtual_dwo_name
);
10098 /* Can we use an existing virtual DWO file? */
10099 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10100 /* Create one if necessary. */
10101 if (*dwo_file_slot
== NULL
)
10103 if (dwarf_read_debug
)
10105 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10108 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10110 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10112 strlen (virtual_dwo_name
));
10113 dwo_file
->comp_dir
= comp_dir
;
10114 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10115 dwo_file
->sections
.line
= sections
.line
;
10116 dwo_file
->sections
.loc
= sections
.loc
;
10117 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10118 dwo_file
->sections
.macro
= sections
.macro
;
10119 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10120 /* The "str" section is global to the entire DWP file. */
10121 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10122 /* The info or types section is assigned below to dwo_unit,
10123 there's no need to record it in dwo_file.
10124 Also, we can't simply record type sections in dwo_file because
10125 we record a pointer into the vector in dwo_unit. As we collect more
10126 types we'll grow the vector and eventually have to reallocate space
10127 for it, invalidating all copies of pointers into the previous
10129 *dwo_file_slot
= dwo_file
;
10133 if (dwarf_read_debug
)
10135 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10138 dwo_file
= *dwo_file_slot
;
10140 do_cleanups (cleanups
);
10142 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10143 dwo_unit
->dwo_file
= dwo_file
;
10144 dwo_unit
->signature
= signature
;
10145 dwo_unit
->section
=
10146 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10147 *dwo_unit
->section
= sections
.info_or_types
;
10148 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10153 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10154 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10155 piece within that section used by a TU/CU, return a virtual section
10156 of just that piece. */
10158 static struct dwarf2_section_info
10159 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10160 bfd_size_type offset
, bfd_size_type size
)
10162 struct dwarf2_section_info result
;
10165 gdb_assert (section
!= NULL
);
10166 gdb_assert (!section
->is_virtual
);
10168 memset (&result
, 0, sizeof (result
));
10169 result
.s
.containing_section
= section
;
10170 result
.is_virtual
= 1;
10175 sectp
= get_section_bfd_section (section
);
10177 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10178 bounds of the real section. This is a pretty-rare event, so just
10179 flag an error (easier) instead of a warning and trying to cope. */
10181 || offset
+ size
> bfd_get_section_size (sectp
))
10183 bfd
*abfd
= sectp
->owner
;
10185 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10186 " in section %s [in module %s]"),
10187 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10188 objfile_name (dwarf2_per_objfile
->objfile
));
10191 result
.virtual_offset
= offset
;
10192 result
.size
= size
;
10196 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10197 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10198 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10199 This is for DWP version 2 files. */
10201 static struct dwo_unit
*
10202 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10203 uint32_t unit_index
,
10204 const char *comp_dir
,
10205 ULONGEST signature
, int is_debug_types
)
10207 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10208 const struct dwp_hash_table
*dwp_htab
=
10209 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10210 bfd
*dbfd
= dwp_file
->dbfd
;
10211 const char *kind
= is_debug_types
? "TU" : "CU";
10212 struct dwo_file
*dwo_file
;
10213 struct dwo_unit
*dwo_unit
;
10214 struct virtual_v2_dwo_sections sections
;
10215 void **dwo_file_slot
;
10216 char *virtual_dwo_name
;
10217 struct dwarf2_section_info
*cutu
;
10218 struct cleanup
*cleanups
;
10221 gdb_assert (dwp_file
->version
== 2);
10223 if (dwarf_read_debug
)
10225 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10227 pulongest (unit_index
), hex_string (signature
),
10231 /* Fetch the section offsets of this DWO unit. */
10233 memset (§ions
, 0, sizeof (sections
));
10234 cleanups
= make_cleanup (null_cleanup
, 0);
10236 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10238 uint32_t offset
= read_4_bytes (dbfd
,
10239 dwp_htab
->section_pool
.v2
.offsets
10240 + (((unit_index
- 1) * dwp_htab
->nr_columns
10242 * sizeof (uint32_t)));
10243 uint32_t size
= read_4_bytes (dbfd
,
10244 dwp_htab
->section_pool
.v2
.sizes
10245 + (((unit_index
- 1) * dwp_htab
->nr_columns
10247 * sizeof (uint32_t)));
10249 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10252 case DW_SECT_TYPES
:
10253 sections
.info_or_types_offset
= offset
;
10254 sections
.info_or_types_size
= size
;
10256 case DW_SECT_ABBREV
:
10257 sections
.abbrev_offset
= offset
;
10258 sections
.abbrev_size
= size
;
10261 sections
.line_offset
= offset
;
10262 sections
.line_size
= size
;
10265 sections
.loc_offset
= offset
;
10266 sections
.loc_size
= size
;
10268 case DW_SECT_STR_OFFSETS
:
10269 sections
.str_offsets_offset
= offset
;
10270 sections
.str_offsets_size
= size
;
10272 case DW_SECT_MACINFO
:
10273 sections
.macinfo_offset
= offset
;
10274 sections
.macinfo_size
= size
;
10276 case DW_SECT_MACRO
:
10277 sections
.macro_offset
= offset
;
10278 sections
.macro_size
= size
;
10283 /* It's easier for the rest of the code if we fake a struct dwo_file and
10284 have dwo_unit "live" in that. At least for now.
10286 The DWP file can be made up of a random collection of CUs and TUs.
10287 However, for each CU + set of TUs that came from the same original DWO
10288 file, we can combine them back into a virtual DWO file to save space
10289 (fewer struct dwo_file objects to allocate). Remember that for really
10290 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10293 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10294 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10295 (long) (sections
.line_size
? sections
.line_offset
: 0),
10296 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10297 (long) (sections
.str_offsets_size
10298 ? sections
.str_offsets_offset
: 0));
10299 make_cleanup (xfree
, virtual_dwo_name
);
10300 /* Can we use an existing virtual DWO file? */
10301 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10302 /* Create one if necessary. */
10303 if (*dwo_file_slot
== NULL
)
10305 if (dwarf_read_debug
)
10307 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10310 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10312 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10314 strlen (virtual_dwo_name
));
10315 dwo_file
->comp_dir
= comp_dir
;
10316 dwo_file
->sections
.abbrev
=
10317 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10318 sections
.abbrev_offset
, sections
.abbrev_size
);
10319 dwo_file
->sections
.line
=
10320 create_dwp_v2_section (&dwp_file
->sections
.line
,
10321 sections
.line_offset
, sections
.line_size
);
10322 dwo_file
->sections
.loc
=
10323 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10324 sections
.loc_offset
, sections
.loc_size
);
10325 dwo_file
->sections
.macinfo
=
10326 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10327 sections
.macinfo_offset
, sections
.macinfo_size
);
10328 dwo_file
->sections
.macro
=
10329 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10330 sections
.macro_offset
, sections
.macro_size
);
10331 dwo_file
->sections
.str_offsets
=
10332 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10333 sections
.str_offsets_offset
,
10334 sections
.str_offsets_size
);
10335 /* The "str" section is global to the entire DWP file. */
10336 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10337 /* The info or types section is assigned below to dwo_unit,
10338 there's no need to record it in dwo_file.
10339 Also, we can't simply record type sections in dwo_file because
10340 we record a pointer into the vector in dwo_unit. As we collect more
10341 types we'll grow the vector and eventually have to reallocate space
10342 for it, invalidating all copies of pointers into the previous
10344 *dwo_file_slot
= dwo_file
;
10348 if (dwarf_read_debug
)
10350 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10353 dwo_file
= *dwo_file_slot
;
10355 do_cleanups (cleanups
);
10357 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10358 dwo_unit
->dwo_file
= dwo_file
;
10359 dwo_unit
->signature
= signature
;
10360 dwo_unit
->section
=
10361 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10362 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10363 ? &dwp_file
->sections
.types
10364 : &dwp_file
->sections
.info
,
10365 sections
.info_or_types_offset
,
10366 sections
.info_or_types_size
);
10367 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10372 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10373 Returns NULL if the signature isn't found. */
10375 static struct dwo_unit
*
10376 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10377 ULONGEST signature
, int is_debug_types
)
10379 const struct dwp_hash_table
*dwp_htab
=
10380 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10381 bfd
*dbfd
= dwp_file
->dbfd
;
10382 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10383 uint32_t hash
= signature
& mask
;
10384 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10387 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10389 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10390 find_dwo_cu
.signature
= signature
;
10391 slot
= htab_find_slot (is_debug_types
10392 ? dwp_file
->loaded_tus
10393 : dwp_file
->loaded_cus
,
10394 &find_dwo_cu
, INSERT
);
10399 /* Use a for loop so that we don't loop forever on bad debug info. */
10400 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10402 ULONGEST signature_in_table
;
10404 signature_in_table
=
10405 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10406 if (signature_in_table
== signature
)
10408 uint32_t unit_index
=
10409 read_4_bytes (dbfd
,
10410 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10412 if (dwp_file
->version
== 1)
10414 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10415 comp_dir
, signature
,
10420 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10421 comp_dir
, signature
,
10426 if (signature_in_table
== 0)
10428 hash
= (hash
+ hash2
) & mask
;
10431 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10432 " [in module %s]"),
10436 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10437 Open the file specified by FILE_NAME and hand it off to BFD for
10438 preliminary analysis. Return a newly initialized bfd *, which
10439 includes a canonicalized copy of FILE_NAME.
10440 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10441 SEARCH_CWD is true if the current directory is to be searched.
10442 It will be searched before debug-file-directory.
10443 If successful, the file is added to the bfd include table of the
10444 objfile's bfd (see gdb_bfd_record_inclusion).
10445 If unable to find/open the file, return NULL.
10446 NOTE: This function is derived from symfile_bfd_open. */
10449 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10453 char *absolute_name
;
10454 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10455 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10456 to debug_file_directory. */
10458 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10462 if (*debug_file_directory
!= '\0')
10463 search_path
= concat (".", dirname_separator_string
,
10464 debug_file_directory
, NULL
);
10466 search_path
= xstrdup (".");
10469 search_path
= xstrdup (debug_file_directory
);
10471 flags
= OPF_RETURN_REALPATH
;
10473 flags
|= OPF_SEARCH_IN_PATH
;
10474 desc
= openp (search_path
, flags
, file_name
,
10475 O_RDONLY
| O_BINARY
, &absolute_name
);
10476 xfree (search_path
);
10480 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10481 xfree (absolute_name
);
10482 if (sym_bfd
== NULL
)
10484 bfd_set_cacheable (sym_bfd
, 1);
10486 if (!bfd_check_format (sym_bfd
, bfd_object
))
10488 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10492 /* Success. Record the bfd as having been included by the objfile's bfd.
10493 This is important because things like demangled_names_hash lives in the
10494 objfile's per_bfd space and may have references to things like symbol
10495 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10496 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10501 /* Try to open DWO file FILE_NAME.
10502 COMP_DIR is the DW_AT_comp_dir attribute.
10503 The result is the bfd handle of the file.
10504 If there is a problem finding or opening the file, return NULL.
10505 Upon success, the canonicalized path of the file is stored in the bfd,
10506 same as symfile_bfd_open. */
10509 open_dwo_file (const char *file_name
, const char *comp_dir
)
10513 if (IS_ABSOLUTE_PATH (file_name
))
10514 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10516 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10518 if (comp_dir
!= NULL
)
10520 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10522 /* NOTE: If comp_dir is a relative path, this will also try the
10523 search path, which seems useful. */
10524 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10525 xfree (path_to_try
);
10530 /* That didn't work, try debug-file-directory, which, despite its name,
10531 is a list of paths. */
10533 if (*debug_file_directory
== '\0')
10536 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10539 /* This function is mapped across the sections and remembers the offset and
10540 size of each of the DWO debugging sections we are interested in. */
10543 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10545 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10546 const struct dwop_section_names
*names
= &dwop_section_names
;
10548 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10550 dwo_sections
->abbrev
.s
.section
= sectp
;
10551 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10553 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10555 dwo_sections
->info
.s
.section
= sectp
;
10556 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10558 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10560 dwo_sections
->line
.s
.section
= sectp
;
10561 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10563 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10565 dwo_sections
->loc
.s
.section
= sectp
;
10566 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10568 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10570 dwo_sections
->macinfo
.s
.section
= sectp
;
10571 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10573 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10575 dwo_sections
->macro
.s
.section
= sectp
;
10576 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10578 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10580 dwo_sections
->str
.s
.section
= sectp
;
10581 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10583 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10585 dwo_sections
->str_offsets
.s
.section
= sectp
;
10586 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10588 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10590 struct dwarf2_section_info type_section
;
10592 memset (&type_section
, 0, sizeof (type_section
));
10593 type_section
.s
.section
= sectp
;
10594 type_section
.size
= bfd_get_section_size (sectp
);
10595 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10600 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10601 by PER_CU. This is for the non-DWP case.
10602 The result is NULL if DWO_NAME can't be found. */
10604 static struct dwo_file
*
10605 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10606 const char *dwo_name
, const char *comp_dir
)
10608 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10609 struct dwo_file
*dwo_file
;
10611 struct cleanup
*cleanups
;
10613 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10616 if (dwarf_read_debug
)
10617 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10620 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10621 dwo_file
->dwo_name
= dwo_name
;
10622 dwo_file
->comp_dir
= comp_dir
;
10623 dwo_file
->dbfd
= dbfd
;
10625 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10627 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10629 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10631 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10632 dwo_file
->sections
.types
);
10634 discard_cleanups (cleanups
);
10636 if (dwarf_read_debug
)
10637 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10642 /* This function is mapped across the sections and remembers the offset and
10643 size of each of the DWP debugging sections common to version 1 and 2 that
10644 we are interested in. */
10647 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10648 void *dwp_file_ptr
)
10650 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10651 const struct dwop_section_names
*names
= &dwop_section_names
;
10652 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10654 /* Record the ELF section number for later lookup: this is what the
10655 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10656 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10657 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10659 /* Look for specific sections that we need. */
10660 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10662 dwp_file
->sections
.str
.s
.section
= sectp
;
10663 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10665 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10667 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10668 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10670 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10672 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10673 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10677 /* This function is mapped across the sections and remembers the offset and
10678 size of each of the DWP version 2 debugging sections that we are interested
10679 in. This is split into a separate function because we don't know if we
10680 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10683 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10685 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10686 const struct dwop_section_names
*names
= &dwop_section_names
;
10687 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10689 /* Record the ELF section number for later lookup: this is what the
10690 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10691 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10692 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10694 /* Look for specific sections that we need. */
10695 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10697 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
10698 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10700 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10702 dwp_file
->sections
.info
.s
.section
= sectp
;
10703 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10705 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10707 dwp_file
->sections
.line
.s
.section
= sectp
;
10708 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10710 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10712 dwp_file
->sections
.loc
.s
.section
= sectp
;
10713 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10715 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10717 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
10718 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10720 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10722 dwp_file
->sections
.macro
.s
.section
= sectp
;
10723 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10725 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10727 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
10728 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10730 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10732 dwp_file
->sections
.types
.s
.section
= sectp
;
10733 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10737 /* Hash function for dwp_file loaded CUs/TUs. */
10740 hash_dwp_loaded_cutus (const void *item
)
10742 const struct dwo_unit
*dwo_unit
= item
;
10744 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10745 return dwo_unit
->signature
;
10748 /* Equality function for dwp_file loaded CUs/TUs. */
10751 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10753 const struct dwo_unit
*dua
= a
;
10754 const struct dwo_unit
*dub
= b
;
10756 return dua
->signature
== dub
->signature
;
10759 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10762 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10764 return htab_create_alloc_ex (3,
10765 hash_dwp_loaded_cutus
,
10766 eq_dwp_loaded_cutus
,
10768 &objfile
->objfile_obstack
,
10769 hashtab_obstack_allocate
,
10770 dummy_obstack_deallocate
);
10773 /* Try to open DWP file FILE_NAME.
10774 The result is the bfd handle of the file.
10775 If there is a problem finding or opening the file, return NULL.
10776 Upon success, the canonicalized path of the file is stored in the bfd,
10777 same as symfile_bfd_open. */
10780 open_dwp_file (const char *file_name
)
10784 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10788 /* Work around upstream bug 15652.
10789 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10790 [Whether that's a "bug" is debatable, but it is getting in our way.]
10791 We have no real idea where the dwp file is, because gdb's realpath-ing
10792 of the executable's path may have discarded the needed info.
10793 [IWBN if the dwp file name was recorded in the executable, akin to
10794 .gnu_debuglink, but that doesn't exist yet.]
10795 Strip the directory from FILE_NAME and search again. */
10796 if (*debug_file_directory
!= '\0')
10798 /* Don't implicitly search the current directory here.
10799 If the user wants to search "." to handle this case,
10800 it must be added to debug-file-directory. */
10801 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10808 /* Initialize the use of the DWP file for the current objfile.
10809 By convention the name of the DWP file is ${objfile}.dwp.
10810 The result is NULL if it can't be found. */
10812 static struct dwp_file
*
10813 open_and_init_dwp_file (void)
10815 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10816 struct dwp_file
*dwp_file
;
10819 struct cleanup
*cleanups
;
10821 /* Try to find first .dwp for the binary file before any symbolic links
10823 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10824 cleanups
= make_cleanup (xfree
, dwp_name
);
10826 dbfd
= open_dwp_file (dwp_name
);
10828 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10830 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10831 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10832 make_cleanup (xfree
, dwp_name
);
10833 dbfd
= open_dwp_file (dwp_name
);
10838 if (dwarf_read_debug
)
10839 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10840 do_cleanups (cleanups
);
10843 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10844 dwp_file
->name
= bfd_get_filename (dbfd
);
10845 dwp_file
->dbfd
= dbfd
;
10846 do_cleanups (cleanups
);
10848 /* +1: section 0 is unused */
10849 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10850 dwp_file
->elf_sections
=
10851 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10852 dwp_file
->num_sections
, asection
*);
10854 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10856 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10858 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10860 /* The DWP file version is stored in the hash table. Oh well. */
10861 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10863 /* Technically speaking, we should try to limp along, but this is
10864 pretty bizarre. We use pulongest here because that's the established
10865 portability solution (e.g, we cannot use %u for uint32_t). */
10866 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10867 " TU version %s [in DWP file %s]"),
10868 pulongest (dwp_file
->cus
->version
),
10869 pulongest (dwp_file
->tus
->version
), dwp_name
);
10871 dwp_file
->version
= dwp_file
->cus
->version
;
10873 if (dwp_file
->version
== 2)
10874 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10876 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10877 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10879 if (dwarf_read_debug
)
10881 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10882 fprintf_unfiltered (gdb_stdlog
,
10883 " %s CUs, %s TUs\n",
10884 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10885 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10891 /* Wrapper around open_and_init_dwp_file, only open it once. */
10893 static struct dwp_file
*
10894 get_dwp_file (void)
10896 if (! dwarf2_per_objfile
->dwp_checked
)
10898 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10899 dwarf2_per_objfile
->dwp_checked
= 1;
10901 return dwarf2_per_objfile
->dwp_file
;
10904 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10905 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10906 or in the DWP file for the objfile, referenced by THIS_UNIT.
10907 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10908 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10910 This is called, for example, when wanting to read a variable with a
10911 complex location. Therefore we don't want to do file i/o for every call.
10912 Therefore we don't want to look for a DWO file on every call.
10913 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10914 then we check if we've already seen DWO_NAME, and only THEN do we check
10917 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10918 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10920 static struct dwo_unit
*
10921 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10922 const char *dwo_name
, const char *comp_dir
,
10923 ULONGEST signature
, int is_debug_types
)
10925 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10926 const char *kind
= is_debug_types
? "TU" : "CU";
10927 void **dwo_file_slot
;
10928 struct dwo_file
*dwo_file
;
10929 struct dwp_file
*dwp_file
;
10931 /* First see if there's a DWP file.
10932 If we have a DWP file but didn't find the DWO inside it, don't
10933 look for the original DWO file. It makes gdb behave differently
10934 depending on whether one is debugging in the build tree. */
10936 dwp_file
= get_dwp_file ();
10937 if (dwp_file
!= NULL
)
10939 const struct dwp_hash_table
*dwp_htab
=
10940 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10942 if (dwp_htab
!= NULL
)
10944 struct dwo_unit
*dwo_cutu
=
10945 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10946 signature
, is_debug_types
);
10948 if (dwo_cutu
!= NULL
)
10950 if (dwarf_read_debug
)
10952 fprintf_unfiltered (gdb_stdlog
,
10953 "Virtual DWO %s %s found: @%s\n",
10954 kind
, hex_string (signature
),
10955 host_address_to_string (dwo_cutu
));
10963 /* No DWP file, look for the DWO file. */
10965 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10966 if (*dwo_file_slot
== NULL
)
10968 /* Read in the file and build a table of the CUs/TUs it contains. */
10969 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10971 /* NOTE: This will be NULL if unable to open the file. */
10972 dwo_file
= *dwo_file_slot
;
10974 if (dwo_file
!= NULL
)
10976 struct dwo_unit
*dwo_cutu
= NULL
;
10978 if (is_debug_types
&& dwo_file
->tus
)
10980 struct dwo_unit find_dwo_cutu
;
10982 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10983 find_dwo_cutu
.signature
= signature
;
10984 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10986 else if (!is_debug_types
&& dwo_file
->cu
)
10988 if (signature
== dwo_file
->cu
->signature
)
10989 dwo_cutu
= dwo_file
->cu
;
10992 if (dwo_cutu
!= NULL
)
10994 if (dwarf_read_debug
)
10996 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
10997 kind
, dwo_name
, hex_string (signature
),
10998 host_address_to_string (dwo_cutu
));
11005 /* We didn't find it. This could mean a dwo_id mismatch, or
11006 someone deleted the DWO/DWP file, or the search path isn't set up
11007 correctly to find the file. */
11009 if (dwarf_read_debug
)
11011 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11012 kind
, dwo_name
, hex_string (signature
));
11015 /* This is a warning and not a complaint because it can be caused by
11016 pilot error (e.g., user accidentally deleting the DWO). */
11018 /* Print the name of the DWP file if we looked there, helps the user
11019 better diagnose the problem. */
11020 char *dwp_text
= NULL
;
11021 struct cleanup
*cleanups
;
11023 if (dwp_file
!= NULL
)
11024 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11025 cleanups
= make_cleanup (xfree
, dwp_text
);
11027 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11028 " [in module %s]"),
11029 kind
, dwo_name
, hex_string (signature
),
11030 dwp_text
!= NULL
? dwp_text
: "",
11031 this_unit
->is_debug_types
? "TU" : "CU",
11032 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11034 do_cleanups (cleanups
);
11039 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11040 See lookup_dwo_cutu_unit for details. */
11042 static struct dwo_unit
*
11043 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11044 const char *dwo_name
, const char *comp_dir
,
11045 ULONGEST signature
)
11047 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11050 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11051 See lookup_dwo_cutu_unit for details. */
11053 static struct dwo_unit
*
11054 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11055 const char *dwo_name
, const char *comp_dir
)
11057 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11060 /* Traversal function for queue_and_load_all_dwo_tus. */
11063 queue_and_load_dwo_tu (void **slot
, void *info
)
11065 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11066 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11067 ULONGEST signature
= dwo_unit
->signature
;
11068 struct signatured_type
*sig_type
=
11069 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11071 if (sig_type
!= NULL
)
11073 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11075 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11076 a real dependency of PER_CU on SIG_TYPE. That is detected later
11077 while processing PER_CU. */
11078 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11079 load_full_type_unit (sig_cu
);
11080 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11086 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11087 The DWO may have the only definition of the type, though it may not be
11088 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11089 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11092 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11094 struct dwo_unit
*dwo_unit
;
11095 struct dwo_file
*dwo_file
;
11097 gdb_assert (!per_cu
->is_debug_types
);
11098 gdb_assert (get_dwp_file () == NULL
);
11099 gdb_assert (per_cu
->cu
!= NULL
);
11101 dwo_unit
= per_cu
->cu
->dwo_unit
;
11102 gdb_assert (dwo_unit
!= NULL
);
11104 dwo_file
= dwo_unit
->dwo_file
;
11105 if (dwo_file
->tus
!= NULL
)
11106 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11109 /* Free all resources associated with DWO_FILE.
11110 Close the DWO file and munmap the sections.
11111 All memory should be on the objfile obstack. */
11114 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11117 struct dwarf2_section_info
*section
;
11119 /* Note: dbfd is NULL for virtual DWO files. */
11120 gdb_bfd_unref (dwo_file
->dbfd
);
11122 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11125 /* Wrapper for free_dwo_file for use in cleanups. */
11128 free_dwo_file_cleanup (void *arg
)
11130 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11131 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11133 free_dwo_file (dwo_file
, objfile
);
11136 /* Traversal function for free_dwo_files. */
11139 free_dwo_file_from_slot (void **slot
, void *info
)
11141 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11142 struct objfile
*objfile
= (struct objfile
*) info
;
11144 free_dwo_file (dwo_file
, objfile
);
11149 /* Free all resources associated with DWO_FILES. */
11152 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11154 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11157 /* Read in various DIEs. */
11159 /* qsort helper for inherit_abstract_dies. */
11162 unsigned_int_compar (const void *ap
, const void *bp
)
11164 unsigned int a
= *(unsigned int *) ap
;
11165 unsigned int b
= *(unsigned int *) bp
;
11167 return (a
> b
) - (b
> a
);
11170 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11171 Inherit only the children of the DW_AT_abstract_origin DIE not being
11172 already referenced by DW_AT_abstract_origin from the children of the
11176 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11178 struct die_info
*child_die
;
11179 unsigned die_children_count
;
11180 /* CU offsets which were referenced by children of the current DIE. */
11181 sect_offset
*offsets
;
11182 sect_offset
*offsets_end
, *offsetp
;
11183 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11184 struct die_info
*origin_die
;
11185 /* Iterator of the ORIGIN_DIE children. */
11186 struct die_info
*origin_child_die
;
11187 struct cleanup
*cleanups
;
11188 struct attribute
*attr
;
11189 struct dwarf2_cu
*origin_cu
;
11190 struct pending
**origin_previous_list_in_scope
;
11192 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11196 /* Note that following die references may follow to a die in a
11200 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11202 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11204 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11205 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11207 if (die
->tag
!= origin_die
->tag
11208 && !(die
->tag
== DW_TAG_inlined_subroutine
11209 && origin_die
->tag
== DW_TAG_subprogram
))
11210 complaint (&symfile_complaints
,
11211 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11212 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11214 child_die
= die
->child
;
11215 die_children_count
= 0;
11216 while (child_die
&& child_die
->tag
)
11218 child_die
= sibling_die (child_die
);
11219 die_children_count
++;
11221 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11222 cleanups
= make_cleanup (xfree
, offsets
);
11224 offsets_end
= offsets
;
11225 for (child_die
= die
->child
;
11226 child_die
&& child_die
->tag
;
11227 child_die
= sibling_die (child_die
))
11229 struct die_info
*child_origin_die
;
11230 struct dwarf2_cu
*child_origin_cu
;
11232 /* We are trying to process concrete instance entries:
11233 DW_TAG_GNU_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11234 it's not relevant to our analysis here. i.e. detecting DIEs that are
11235 present in the abstract instance but not referenced in the concrete
11237 if (child_die
->tag
== DW_TAG_GNU_call_site
)
11240 /* For each CHILD_DIE, find the corresponding child of
11241 ORIGIN_DIE. If there is more than one layer of
11242 DW_AT_abstract_origin, follow them all; there shouldn't be,
11243 but GCC versions at least through 4.4 generate this (GCC PR
11245 child_origin_die
= child_die
;
11246 child_origin_cu
= cu
;
11249 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11253 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11257 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11258 counterpart may exist. */
11259 if (child_origin_die
!= child_die
)
11261 if (child_die
->tag
!= child_origin_die
->tag
11262 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11263 && child_origin_die
->tag
== DW_TAG_subprogram
))
11264 complaint (&symfile_complaints
,
11265 _("Child DIE 0x%x and its abstract origin 0x%x have "
11266 "different tags"), child_die
->offset
.sect_off
,
11267 child_origin_die
->offset
.sect_off
);
11268 if (child_origin_die
->parent
!= origin_die
)
11269 complaint (&symfile_complaints
,
11270 _("Child DIE 0x%x and its abstract origin 0x%x have "
11271 "different parents"), child_die
->offset
.sect_off
,
11272 child_origin_die
->offset
.sect_off
);
11274 *offsets_end
++ = child_origin_die
->offset
;
11277 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11278 unsigned_int_compar
);
11279 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11280 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11281 complaint (&symfile_complaints
,
11282 _("Multiple children of DIE 0x%x refer "
11283 "to DIE 0x%x as their abstract origin"),
11284 die
->offset
.sect_off
, offsetp
->sect_off
);
11287 origin_child_die
= origin_die
->child
;
11288 while (origin_child_die
&& origin_child_die
->tag
)
11290 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11291 while (offsetp
< offsets_end
11292 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11294 if (offsetp
>= offsets_end
11295 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11297 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11298 Check whether we're already processing ORIGIN_CHILD_DIE.
11299 This can happen with mutually referenced abstract_origins.
11301 if (!origin_child_die
->in_process
)
11302 process_die (origin_child_die
, origin_cu
);
11304 origin_child_die
= sibling_die (origin_child_die
);
11306 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11308 do_cleanups (cleanups
);
11312 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11314 struct objfile
*objfile
= cu
->objfile
;
11315 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11316 struct context_stack
*newobj
;
11319 struct die_info
*child_die
;
11320 struct attribute
*attr
, *call_line
, *call_file
;
11322 CORE_ADDR baseaddr
;
11323 struct block
*block
;
11324 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11325 VEC (symbolp
) *template_args
= NULL
;
11326 struct template_symbol
*templ_func
= NULL
;
11330 /* If we do not have call site information, we can't show the
11331 caller of this inlined function. That's too confusing, so
11332 only use the scope for local variables. */
11333 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11334 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11335 if (call_line
== NULL
|| call_file
== NULL
)
11337 read_lexical_block_scope (die
, cu
);
11342 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11344 name
= dwarf2_name (die
, cu
);
11346 /* Ignore functions with missing or empty names. These are actually
11347 illegal according to the DWARF standard. */
11350 complaint (&symfile_complaints
,
11351 _("missing name for subprogram DIE at %d"),
11352 die
->offset
.sect_off
);
11356 /* Ignore functions with missing or invalid low and high pc attributes. */
11357 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11359 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11360 if (!attr
|| !DW_UNSND (attr
))
11361 complaint (&symfile_complaints
,
11362 _("cannot get low and high bounds "
11363 "for subprogram DIE at %d"),
11364 die
->offset
.sect_off
);
11368 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11369 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11371 /* If we have any template arguments, then we must allocate a
11372 different sort of symbol. */
11373 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11375 if (child_die
->tag
== DW_TAG_template_type_param
11376 || child_die
->tag
== DW_TAG_template_value_param
)
11378 templ_func
= allocate_template_symbol (objfile
);
11379 templ_func
->base
.is_cplus_template_function
= 1;
11384 newobj
= push_context (0, lowpc
);
11385 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11386 (struct symbol
*) templ_func
);
11388 /* If there is a location expression for DW_AT_frame_base, record
11390 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11392 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11394 /* If there is a location for the static link, record it. */
11395 newobj
->static_link
= NULL
;
11396 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11399 newobj
->static_link
11400 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11401 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11404 cu
->list_in_scope
= &local_symbols
;
11406 if (die
->child
!= NULL
)
11408 child_die
= die
->child
;
11409 while (child_die
&& child_die
->tag
)
11411 if (child_die
->tag
== DW_TAG_template_type_param
11412 || child_die
->tag
== DW_TAG_template_value_param
)
11414 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11417 VEC_safe_push (symbolp
, template_args
, arg
);
11420 process_die (child_die
, cu
);
11421 child_die
= sibling_die (child_die
);
11425 inherit_abstract_dies (die
, cu
);
11427 /* If we have a DW_AT_specification, we might need to import using
11428 directives from the context of the specification DIE. See the
11429 comment in determine_prefix. */
11430 if (cu
->language
== language_cplus
11431 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11433 struct dwarf2_cu
*spec_cu
= cu
;
11434 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11438 child_die
= spec_die
->child
;
11439 while (child_die
&& child_die
->tag
)
11441 if (child_die
->tag
== DW_TAG_imported_module
)
11442 process_die (child_die
, spec_cu
);
11443 child_die
= sibling_die (child_die
);
11446 /* In some cases, GCC generates specification DIEs that
11447 themselves contain DW_AT_specification attributes. */
11448 spec_die
= die_specification (spec_die
, &spec_cu
);
11452 newobj
= pop_context ();
11453 /* Make a block for the local symbols within. */
11454 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11455 newobj
->static_link
, lowpc
, highpc
);
11457 /* For C++, set the block's scope. */
11458 if ((cu
->language
== language_cplus
11459 || cu
->language
== language_fortran
11460 || cu
->language
== language_d
)
11461 && cu
->processing_has_namespace_info
)
11462 block_set_scope (block
, determine_prefix (die
, cu
),
11463 &objfile
->objfile_obstack
);
11465 /* If we have address ranges, record them. */
11466 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11468 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11470 /* Attach template arguments to function. */
11471 if (! VEC_empty (symbolp
, template_args
))
11473 gdb_assert (templ_func
!= NULL
);
11475 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11476 templ_func
->template_arguments
11477 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11478 templ_func
->n_template_arguments
);
11479 memcpy (templ_func
->template_arguments
,
11480 VEC_address (symbolp
, template_args
),
11481 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11482 VEC_free (symbolp
, template_args
);
11485 /* In C++, we can have functions nested inside functions (e.g., when
11486 a function declares a class that has methods). This means that
11487 when we finish processing a function scope, we may need to go
11488 back to building a containing block's symbol lists. */
11489 local_symbols
= newobj
->locals
;
11490 local_using_directives
= newobj
->local_using_directives
;
11492 /* If we've finished processing a top-level function, subsequent
11493 symbols go in the file symbol list. */
11494 if (outermost_context_p ())
11495 cu
->list_in_scope
= &file_symbols
;
11498 /* Process all the DIES contained within a lexical block scope. Start
11499 a new scope, process the dies, and then close the scope. */
11502 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11504 struct objfile
*objfile
= cu
->objfile
;
11505 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11506 struct context_stack
*newobj
;
11507 CORE_ADDR lowpc
, highpc
;
11508 struct die_info
*child_die
;
11509 CORE_ADDR baseaddr
;
11511 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11513 /* Ignore blocks with missing or invalid low and high pc attributes. */
11514 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11515 as multiple lexical blocks? Handling children in a sane way would
11516 be nasty. Might be easier to properly extend generic blocks to
11517 describe ranges. */
11518 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11520 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11521 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11523 push_context (0, lowpc
);
11524 if (die
->child
!= NULL
)
11526 child_die
= die
->child
;
11527 while (child_die
&& child_die
->tag
)
11529 process_die (child_die
, cu
);
11530 child_die
= sibling_die (child_die
);
11533 inherit_abstract_dies (die
, cu
);
11534 newobj
= pop_context ();
11536 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11538 struct block
*block
11539 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11540 newobj
->start_addr
, highpc
);
11542 /* Note that recording ranges after traversing children, as we
11543 do here, means that recording a parent's ranges entails
11544 walking across all its children's ranges as they appear in
11545 the address map, which is quadratic behavior.
11547 It would be nicer to record the parent's ranges before
11548 traversing its children, simply overriding whatever you find
11549 there. But since we don't even decide whether to create a
11550 block until after we've traversed its children, that's hard
11552 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11554 local_symbols
= newobj
->locals
;
11555 local_using_directives
= newobj
->local_using_directives
;
11558 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11561 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11563 struct objfile
*objfile
= cu
->objfile
;
11564 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11565 CORE_ADDR pc
, baseaddr
;
11566 struct attribute
*attr
;
11567 struct call_site
*call_site
, call_site_local
;
11570 struct die_info
*child_die
;
11572 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11574 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11577 complaint (&symfile_complaints
,
11578 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11579 "DIE 0x%x [in module %s]"),
11580 die
->offset
.sect_off
, objfile_name (objfile
));
11583 pc
= attr_value_as_address (attr
) + baseaddr
;
11584 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11586 if (cu
->call_site_htab
== NULL
)
11587 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11588 NULL
, &objfile
->objfile_obstack
,
11589 hashtab_obstack_allocate
, NULL
);
11590 call_site_local
.pc
= pc
;
11591 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11594 complaint (&symfile_complaints
,
11595 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11596 "DIE 0x%x [in module %s]"),
11597 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11598 objfile_name (objfile
));
11602 /* Count parameters at the caller. */
11605 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11606 child_die
= sibling_die (child_die
))
11608 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11610 complaint (&symfile_complaints
,
11611 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11612 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11613 child_die
->tag
, child_die
->offset
.sect_off
,
11614 objfile_name (objfile
));
11622 = ((struct call_site
*)
11623 obstack_alloc (&objfile
->objfile_obstack
,
11624 sizeof (*call_site
)
11625 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11627 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11628 call_site
->pc
= pc
;
11630 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11632 struct die_info
*func_die
;
11634 /* Skip also over DW_TAG_inlined_subroutine. */
11635 for (func_die
= die
->parent
;
11636 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11637 && func_die
->tag
!= DW_TAG_subroutine_type
;
11638 func_die
= func_die
->parent
);
11640 /* DW_AT_GNU_all_call_sites is a superset
11641 of DW_AT_GNU_all_tail_call_sites. */
11643 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11644 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11646 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11647 not complete. But keep CALL_SITE for look ups via call_site_htab,
11648 both the initial caller containing the real return address PC and
11649 the final callee containing the current PC of a chain of tail
11650 calls do not need to have the tail call list complete. But any
11651 function candidate for a virtual tail call frame searched via
11652 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11653 determined unambiguously. */
11657 struct type
*func_type
= NULL
;
11660 func_type
= get_die_type (func_die
, cu
);
11661 if (func_type
!= NULL
)
11663 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11665 /* Enlist this call site to the function. */
11666 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11667 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11670 complaint (&symfile_complaints
,
11671 _("Cannot find function owning DW_TAG_GNU_call_site "
11672 "DIE 0x%x [in module %s]"),
11673 die
->offset
.sect_off
, objfile_name (objfile
));
11677 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11679 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11680 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11681 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11682 /* Keep NULL DWARF_BLOCK. */;
11683 else if (attr_form_is_block (attr
))
11685 struct dwarf2_locexpr_baton
*dlbaton
;
11687 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
11688 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11689 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11690 dlbaton
->per_cu
= cu
->per_cu
;
11692 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11694 else if (attr_form_is_ref (attr
))
11696 struct dwarf2_cu
*target_cu
= cu
;
11697 struct die_info
*target_die
;
11699 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11700 gdb_assert (target_cu
->objfile
== objfile
);
11701 if (die_is_declaration (target_die
, target_cu
))
11703 const char *target_physname
;
11705 /* Prefer the mangled name; otherwise compute the demangled one. */
11706 target_physname
= dwarf2_string_attr (target_die
,
11707 DW_AT_linkage_name
,
11709 if (target_physname
== NULL
)
11710 target_physname
= dwarf2_string_attr (target_die
,
11711 DW_AT_MIPS_linkage_name
,
11713 if (target_physname
== NULL
)
11714 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11715 if (target_physname
== NULL
)
11716 complaint (&symfile_complaints
,
11717 _("DW_AT_GNU_call_site_target target DIE has invalid "
11718 "physname, for referencing DIE 0x%x [in module %s]"),
11719 die
->offset
.sect_off
, objfile_name (objfile
));
11721 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11727 /* DW_AT_entry_pc should be preferred. */
11728 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11729 complaint (&symfile_complaints
,
11730 _("DW_AT_GNU_call_site_target target DIE has invalid "
11731 "low pc, for referencing DIE 0x%x [in module %s]"),
11732 die
->offset
.sect_off
, objfile_name (objfile
));
11735 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11736 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11741 complaint (&symfile_complaints
,
11742 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11743 "block nor reference, for DIE 0x%x [in module %s]"),
11744 die
->offset
.sect_off
, objfile_name (objfile
));
11746 call_site
->per_cu
= cu
->per_cu
;
11748 for (child_die
= die
->child
;
11749 child_die
&& child_die
->tag
;
11750 child_die
= sibling_die (child_die
))
11752 struct call_site_parameter
*parameter
;
11753 struct attribute
*loc
, *origin
;
11755 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11757 /* Already printed the complaint above. */
11761 gdb_assert (call_site
->parameter_count
< nparams
);
11762 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11764 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11765 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11766 register is contained in DW_AT_GNU_call_site_value. */
11768 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11769 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11770 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11772 sect_offset offset
;
11774 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11775 offset
= dwarf2_get_ref_die_offset (origin
);
11776 if (!offset_in_cu_p (&cu
->header
, offset
))
11778 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11779 binding can be done only inside one CU. Such referenced DIE
11780 therefore cannot be even moved to DW_TAG_partial_unit. */
11781 complaint (&symfile_complaints
,
11782 _("DW_AT_abstract_origin offset is not in CU for "
11783 "DW_TAG_GNU_call_site child DIE 0x%x "
11785 child_die
->offset
.sect_off
, objfile_name (objfile
));
11788 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11789 - cu
->header
.offset
.sect_off
);
11791 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11793 complaint (&symfile_complaints
,
11794 _("No DW_FORM_block* DW_AT_location for "
11795 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11796 child_die
->offset
.sect_off
, objfile_name (objfile
));
11801 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11802 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11803 if (parameter
->u
.dwarf_reg
!= -1)
11804 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11805 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11806 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11807 ¶meter
->u
.fb_offset
))
11808 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11811 complaint (&symfile_complaints
,
11812 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11813 "for DW_FORM_block* DW_AT_location is supported for "
11814 "DW_TAG_GNU_call_site child DIE 0x%x "
11816 child_die
->offset
.sect_off
, objfile_name (objfile
));
11821 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11822 if (!attr_form_is_block (attr
))
11824 complaint (&symfile_complaints
,
11825 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11826 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11827 child_die
->offset
.sect_off
, objfile_name (objfile
));
11830 parameter
->value
= DW_BLOCK (attr
)->data
;
11831 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11833 /* Parameters are not pre-cleared by memset above. */
11834 parameter
->data_value
= NULL
;
11835 parameter
->data_value_size
= 0;
11836 call_site
->parameter_count
++;
11838 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11841 if (!attr_form_is_block (attr
))
11842 complaint (&symfile_complaints
,
11843 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11844 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11845 child_die
->offset
.sect_off
, objfile_name (objfile
));
11848 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11849 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11855 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11856 Return 1 if the attributes are present and valid, otherwise, return 0.
11857 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11860 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11861 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11862 struct partial_symtab
*ranges_pst
)
11864 struct objfile
*objfile
= cu
->objfile
;
11865 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11866 struct comp_unit_head
*cu_header
= &cu
->header
;
11867 bfd
*obfd
= objfile
->obfd
;
11868 unsigned int addr_size
= cu_header
->addr_size
;
11869 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11870 /* Base address selection entry. */
11873 unsigned int dummy
;
11874 const gdb_byte
*buffer
;
11878 CORE_ADDR high
= 0;
11879 CORE_ADDR baseaddr
;
11881 found_base
= cu
->base_known
;
11882 base
= cu
->base_address
;
11884 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11885 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11887 complaint (&symfile_complaints
,
11888 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11892 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11894 /* Read in the largest possible address. */
11895 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11896 if ((marker
& mask
) == mask
)
11898 /* If we found the largest possible address, then
11899 read the base address. */
11900 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11901 buffer
+= 2 * addr_size
;
11902 offset
+= 2 * addr_size
;
11908 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11912 CORE_ADDR range_beginning
, range_end
;
11914 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11915 buffer
+= addr_size
;
11916 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11917 buffer
+= addr_size
;
11918 offset
+= 2 * addr_size
;
11920 /* An end of list marker is a pair of zero addresses. */
11921 if (range_beginning
== 0 && range_end
== 0)
11922 /* Found the end of list entry. */
11925 /* Each base address selection entry is a pair of 2 values.
11926 The first is the largest possible address, the second is
11927 the base address. Check for a base address here. */
11928 if ((range_beginning
& mask
) == mask
)
11930 /* If we found the largest possible address, then
11931 read the base address. */
11932 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11939 /* We have no valid base address for the ranges
11941 complaint (&symfile_complaints
,
11942 _("Invalid .debug_ranges data (no base address)"));
11946 if (range_beginning
> range_end
)
11948 /* Inverted range entries are invalid. */
11949 complaint (&symfile_complaints
,
11950 _("Invalid .debug_ranges data (inverted range)"));
11954 /* Empty range entries have no effect. */
11955 if (range_beginning
== range_end
)
11958 range_beginning
+= base
;
11961 /* A not-uncommon case of bad debug info.
11962 Don't pollute the addrmap with bad data. */
11963 if (range_beginning
+ baseaddr
== 0
11964 && !dwarf2_per_objfile
->has_section_at_zero
)
11966 complaint (&symfile_complaints
,
11967 _(".debug_ranges entry has start address of zero"
11968 " [in module %s]"), objfile_name (objfile
));
11972 if (ranges_pst
!= NULL
)
11977 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11978 range_beginning
+ baseaddr
);
11979 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11980 range_end
+ baseaddr
);
11981 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11985 /* FIXME: This is recording everything as a low-high
11986 segment of consecutive addresses. We should have a
11987 data structure for discontiguous block ranges
11991 low
= range_beginning
;
11997 if (range_beginning
< low
)
11998 low
= range_beginning
;
11999 if (range_end
> high
)
12005 /* If the first entry is an end-of-list marker, the range
12006 describes an empty scope, i.e. no instructions. */
12012 *high_return
= high
;
12016 /* Get low and high pc attributes from a die. Return 1 if the attributes
12017 are present and valid, otherwise, return 0. Return -1 if the range is
12018 discontinuous, i.e. derived from DW_AT_ranges information. */
12021 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12022 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12023 struct partial_symtab
*pst
)
12025 struct attribute
*attr
;
12026 struct attribute
*attr_high
;
12028 CORE_ADDR high
= 0;
12031 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12034 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12037 low
= attr_value_as_address (attr
);
12038 high
= attr_value_as_address (attr_high
);
12039 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12043 /* Found high w/o low attribute. */
12046 /* Found consecutive range of addresses. */
12051 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12054 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12055 We take advantage of the fact that DW_AT_ranges does not appear
12056 in DW_TAG_compile_unit of DWO files. */
12057 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12058 unsigned int ranges_offset
= (DW_UNSND (attr
)
12059 + (need_ranges_base
12063 /* Value of the DW_AT_ranges attribute is the offset in the
12064 .debug_ranges section. */
12065 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12067 /* Found discontinuous range of addresses. */
12072 /* read_partial_die has also the strict LOW < HIGH requirement. */
12076 /* When using the GNU linker, .gnu.linkonce. sections are used to
12077 eliminate duplicate copies of functions and vtables and such.
12078 The linker will arbitrarily choose one and discard the others.
12079 The AT_*_pc values for such functions refer to local labels in
12080 these sections. If the section from that file was discarded, the
12081 labels are not in the output, so the relocs get a value of 0.
12082 If this is a discarded function, mark the pc bounds as invalid,
12083 so that GDB will ignore it. */
12084 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12093 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12094 its low and high PC addresses. Do nothing if these addresses could not
12095 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12096 and HIGHPC to the high address if greater than HIGHPC. */
12099 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12100 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12101 struct dwarf2_cu
*cu
)
12103 CORE_ADDR low
, high
;
12104 struct die_info
*child
= die
->child
;
12106 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12108 *lowpc
= min (*lowpc
, low
);
12109 *highpc
= max (*highpc
, high
);
12112 /* If the language does not allow nested subprograms (either inside
12113 subprograms or lexical blocks), we're done. */
12114 if (cu
->language
!= language_ada
)
12117 /* Check all the children of the given DIE. If it contains nested
12118 subprograms, then check their pc bounds. Likewise, we need to
12119 check lexical blocks as well, as they may also contain subprogram
12121 while (child
&& child
->tag
)
12123 if (child
->tag
== DW_TAG_subprogram
12124 || child
->tag
== DW_TAG_lexical_block
)
12125 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12126 child
= sibling_die (child
);
12130 /* Get the low and high pc's represented by the scope DIE, and store
12131 them in *LOWPC and *HIGHPC. If the correct values can't be
12132 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12135 get_scope_pc_bounds (struct die_info
*die
,
12136 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12137 struct dwarf2_cu
*cu
)
12139 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12140 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12141 CORE_ADDR current_low
, current_high
;
12143 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12145 best_low
= current_low
;
12146 best_high
= current_high
;
12150 struct die_info
*child
= die
->child
;
12152 while (child
&& child
->tag
)
12154 switch (child
->tag
) {
12155 case DW_TAG_subprogram
:
12156 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12158 case DW_TAG_namespace
:
12159 case DW_TAG_module
:
12160 /* FIXME: carlton/2004-01-16: Should we do this for
12161 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12162 that current GCC's always emit the DIEs corresponding
12163 to definitions of methods of classes as children of a
12164 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12165 the DIEs giving the declarations, which could be
12166 anywhere). But I don't see any reason why the
12167 standards says that they have to be there. */
12168 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12170 if (current_low
!= ((CORE_ADDR
) -1))
12172 best_low
= min (best_low
, current_low
);
12173 best_high
= max (best_high
, current_high
);
12181 child
= sibling_die (child
);
12186 *highpc
= best_high
;
12189 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12193 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12194 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12196 struct objfile
*objfile
= cu
->objfile
;
12197 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12198 struct attribute
*attr
;
12199 struct attribute
*attr_high
;
12201 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12204 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12207 CORE_ADDR low
= attr_value_as_address (attr
);
12208 CORE_ADDR high
= attr_value_as_address (attr_high
);
12210 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12213 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12214 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12215 record_block_range (block
, low
, high
- 1);
12219 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12222 bfd
*obfd
= objfile
->obfd
;
12223 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12224 We take advantage of the fact that DW_AT_ranges does not appear
12225 in DW_TAG_compile_unit of DWO files. */
12226 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12228 /* The value of the DW_AT_ranges attribute is the offset of the
12229 address range list in the .debug_ranges section. */
12230 unsigned long offset
= (DW_UNSND (attr
)
12231 + (need_ranges_base
? cu
->ranges_base
: 0));
12232 const gdb_byte
*buffer
;
12234 /* For some target architectures, but not others, the
12235 read_address function sign-extends the addresses it returns.
12236 To recognize base address selection entries, we need a
12238 unsigned int addr_size
= cu
->header
.addr_size
;
12239 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12241 /* The base address, to which the next pair is relative. Note
12242 that this 'base' is a DWARF concept: most entries in a range
12243 list are relative, to reduce the number of relocs against the
12244 debugging information. This is separate from this function's
12245 'baseaddr' argument, which GDB uses to relocate debugging
12246 information from a shared library based on the address at
12247 which the library was loaded. */
12248 CORE_ADDR base
= cu
->base_address
;
12249 int base_known
= cu
->base_known
;
12251 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12252 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12254 complaint (&symfile_complaints
,
12255 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12259 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12263 unsigned int bytes_read
;
12264 CORE_ADDR start
, end
;
12266 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12267 buffer
+= bytes_read
;
12268 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12269 buffer
+= bytes_read
;
12271 /* Did we find the end of the range list? */
12272 if (start
== 0 && end
== 0)
12275 /* Did we find a base address selection entry? */
12276 else if ((start
& base_select_mask
) == base_select_mask
)
12282 /* We found an ordinary address range. */
12287 complaint (&symfile_complaints
,
12288 _("Invalid .debug_ranges data "
12289 "(no base address)"));
12295 /* Inverted range entries are invalid. */
12296 complaint (&symfile_complaints
,
12297 _("Invalid .debug_ranges data "
12298 "(inverted range)"));
12302 /* Empty range entries have no effect. */
12306 start
+= base
+ baseaddr
;
12307 end
+= base
+ baseaddr
;
12309 /* A not-uncommon case of bad debug info.
12310 Don't pollute the addrmap with bad data. */
12311 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12313 complaint (&symfile_complaints
,
12314 _(".debug_ranges entry has start address of zero"
12315 " [in module %s]"), objfile_name (objfile
));
12319 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12320 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12321 record_block_range (block
, start
, end
- 1);
12327 /* Check whether the producer field indicates either of GCC < 4.6, or the
12328 Intel C/C++ compiler, and cache the result in CU. */
12331 check_producer (struct dwarf2_cu
*cu
)
12336 if (cu
->producer
== NULL
)
12338 /* For unknown compilers expect their behavior is DWARF version
12341 GCC started to support .debug_types sections by -gdwarf-4 since
12342 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12343 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12344 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12345 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12347 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12349 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12350 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12352 else if (startswith (cu
->producer
, "Intel(R) C"))
12353 cu
->producer_is_icc
= 1;
12356 /* For other non-GCC compilers, expect their behavior is DWARF version
12360 cu
->checked_producer
= 1;
12363 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12364 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12365 during 4.6.0 experimental. */
12368 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12370 if (!cu
->checked_producer
)
12371 check_producer (cu
);
12373 return cu
->producer_is_gxx_lt_4_6
;
12376 /* Return the default accessibility type if it is not overriden by
12377 DW_AT_accessibility. */
12379 static enum dwarf_access_attribute
12380 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12382 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12384 /* The default DWARF 2 accessibility for members is public, the default
12385 accessibility for inheritance is private. */
12387 if (die
->tag
!= DW_TAG_inheritance
)
12388 return DW_ACCESS_public
;
12390 return DW_ACCESS_private
;
12394 /* DWARF 3+ defines the default accessibility a different way. The same
12395 rules apply now for DW_TAG_inheritance as for the members and it only
12396 depends on the container kind. */
12398 if (die
->parent
->tag
== DW_TAG_class_type
)
12399 return DW_ACCESS_private
;
12401 return DW_ACCESS_public
;
12405 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12406 offset. If the attribute was not found return 0, otherwise return
12407 1. If it was found but could not properly be handled, set *OFFSET
12411 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12414 struct attribute
*attr
;
12416 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12421 /* Note that we do not check for a section offset first here.
12422 This is because DW_AT_data_member_location is new in DWARF 4,
12423 so if we see it, we can assume that a constant form is really
12424 a constant and not a section offset. */
12425 if (attr_form_is_constant (attr
))
12426 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12427 else if (attr_form_is_section_offset (attr
))
12428 dwarf2_complex_location_expr_complaint ();
12429 else if (attr_form_is_block (attr
))
12430 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12432 dwarf2_complex_location_expr_complaint ();
12440 /* Add an aggregate field to the field list. */
12443 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12444 struct dwarf2_cu
*cu
)
12446 struct objfile
*objfile
= cu
->objfile
;
12447 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12448 struct nextfield
*new_field
;
12449 struct attribute
*attr
;
12451 const char *fieldname
= "";
12453 /* Allocate a new field list entry and link it in. */
12454 new_field
= XNEW (struct nextfield
);
12455 make_cleanup (xfree
, new_field
);
12456 memset (new_field
, 0, sizeof (struct nextfield
));
12458 if (die
->tag
== DW_TAG_inheritance
)
12460 new_field
->next
= fip
->baseclasses
;
12461 fip
->baseclasses
= new_field
;
12465 new_field
->next
= fip
->fields
;
12466 fip
->fields
= new_field
;
12470 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12472 new_field
->accessibility
= DW_UNSND (attr
);
12474 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12475 if (new_field
->accessibility
!= DW_ACCESS_public
)
12476 fip
->non_public_fields
= 1;
12478 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12480 new_field
->virtuality
= DW_UNSND (attr
);
12482 new_field
->virtuality
= DW_VIRTUALITY_none
;
12484 fp
= &new_field
->field
;
12486 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12490 /* Data member other than a C++ static data member. */
12492 /* Get type of field. */
12493 fp
->type
= die_type (die
, cu
);
12495 SET_FIELD_BITPOS (*fp
, 0);
12497 /* Get bit size of field (zero if none). */
12498 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12501 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12505 FIELD_BITSIZE (*fp
) = 0;
12508 /* Get bit offset of field. */
12509 if (handle_data_member_location (die
, cu
, &offset
))
12510 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12511 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12514 if (gdbarch_bits_big_endian (gdbarch
))
12516 /* For big endian bits, the DW_AT_bit_offset gives the
12517 additional bit offset from the MSB of the containing
12518 anonymous object to the MSB of the field. We don't
12519 have to do anything special since we don't need to
12520 know the size of the anonymous object. */
12521 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12525 /* For little endian bits, compute the bit offset to the
12526 MSB of the anonymous object, subtract off the number of
12527 bits from the MSB of the field to the MSB of the
12528 object, and then subtract off the number of bits of
12529 the field itself. The result is the bit offset of
12530 the LSB of the field. */
12531 int anonymous_size
;
12532 int bit_offset
= DW_UNSND (attr
);
12534 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12537 /* The size of the anonymous object containing
12538 the bit field is explicit, so use the
12539 indicated size (in bytes). */
12540 anonymous_size
= DW_UNSND (attr
);
12544 /* The size of the anonymous object containing
12545 the bit field must be inferred from the type
12546 attribute of the data member containing the
12548 anonymous_size
= TYPE_LENGTH (fp
->type
);
12550 SET_FIELD_BITPOS (*fp
,
12551 (FIELD_BITPOS (*fp
)
12552 + anonymous_size
* bits_per_byte
12553 - bit_offset
- FIELD_BITSIZE (*fp
)));
12557 /* Get name of field. */
12558 fieldname
= dwarf2_name (die
, cu
);
12559 if (fieldname
== NULL
)
12562 /* The name is already allocated along with this objfile, so we don't
12563 need to duplicate it for the type. */
12564 fp
->name
= fieldname
;
12566 /* Change accessibility for artificial fields (e.g. virtual table
12567 pointer or virtual base class pointer) to private. */
12568 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12570 FIELD_ARTIFICIAL (*fp
) = 1;
12571 new_field
->accessibility
= DW_ACCESS_private
;
12572 fip
->non_public_fields
= 1;
12575 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12577 /* C++ static member. */
12579 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12580 is a declaration, but all versions of G++ as of this writing
12581 (so through at least 3.2.1) incorrectly generate
12582 DW_TAG_variable tags. */
12584 const char *physname
;
12586 /* Get name of field. */
12587 fieldname
= dwarf2_name (die
, cu
);
12588 if (fieldname
== NULL
)
12591 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12593 /* Only create a symbol if this is an external value.
12594 new_symbol checks this and puts the value in the global symbol
12595 table, which we want. If it is not external, new_symbol
12596 will try to put the value in cu->list_in_scope which is wrong. */
12597 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12599 /* A static const member, not much different than an enum as far as
12600 we're concerned, except that we can support more types. */
12601 new_symbol (die
, NULL
, cu
);
12604 /* Get physical name. */
12605 physname
= dwarf2_physname (fieldname
, die
, cu
);
12607 /* The name is already allocated along with this objfile, so we don't
12608 need to duplicate it for the type. */
12609 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12610 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12611 FIELD_NAME (*fp
) = fieldname
;
12613 else if (die
->tag
== DW_TAG_inheritance
)
12617 /* C++ base class field. */
12618 if (handle_data_member_location (die
, cu
, &offset
))
12619 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12620 FIELD_BITSIZE (*fp
) = 0;
12621 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12622 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12623 fip
->nbaseclasses
++;
12627 /* Add a typedef defined in the scope of the FIP's class. */
12630 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12631 struct dwarf2_cu
*cu
)
12633 struct objfile
*objfile
= cu
->objfile
;
12634 struct typedef_field_list
*new_field
;
12635 struct attribute
*attr
;
12636 struct typedef_field
*fp
;
12637 char *fieldname
= "";
12639 /* Allocate a new field list entry and link it in. */
12640 new_field
= XCNEW (struct typedef_field_list
);
12641 make_cleanup (xfree
, new_field
);
12643 gdb_assert (die
->tag
== DW_TAG_typedef
);
12645 fp
= &new_field
->field
;
12647 /* Get name of field. */
12648 fp
->name
= dwarf2_name (die
, cu
);
12649 if (fp
->name
== NULL
)
12652 fp
->type
= read_type_die (die
, cu
);
12654 new_field
->next
= fip
->typedef_field_list
;
12655 fip
->typedef_field_list
= new_field
;
12656 fip
->typedef_field_list_count
++;
12659 /* Create the vector of fields, and attach it to the type. */
12662 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12663 struct dwarf2_cu
*cu
)
12665 int nfields
= fip
->nfields
;
12667 /* Record the field count, allocate space for the array of fields,
12668 and create blank accessibility bitfields if necessary. */
12669 TYPE_NFIELDS (type
) = nfields
;
12670 TYPE_FIELDS (type
) = (struct field
*)
12671 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12672 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12674 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12676 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12678 TYPE_FIELD_PRIVATE_BITS (type
) =
12679 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12680 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12682 TYPE_FIELD_PROTECTED_BITS (type
) =
12683 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12684 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12686 TYPE_FIELD_IGNORE_BITS (type
) =
12687 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12688 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12691 /* If the type has baseclasses, allocate and clear a bit vector for
12692 TYPE_FIELD_VIRTUAL_BITS. */
12693 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12695 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12696 unsigned char *pointer
;
12698 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12699 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
12700 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12701 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12702 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12705 /* Copy the saved-up fields into the field vector. Start from the head of
12706 the list, adding to the tail of the field array, so that they end up in
12707 the same order in the array in which they were added to the list. */
12708 while (nfields
-- > 0)
12710 struct nextfield
*fieldp
;
12714 fieldp
= fip
->fields
;
12715 fip
->fields
= fieldp
->next
;
12719 fieldp
= fip
->baseclasses
;
12720 fip
->baseclasses
= fieldp
->next
;
12723 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12724 switch (fieldp
->accessibility
)
12726 case DW_ACCESS_private
:
12727 if (cu
->language
!= language_ada
)
12728 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12731 case DW_ACCESS_protected
:
12732 if (cu
->language
!= language_ada
)
12733 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12736 case DW_ACCESS_public
:
12740 /* Unknown accessibility. Complain and treat it as public. */
12742 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12743 fieldp
->accessibility
);
12747 if (nfields
< fip
->nbaseclasses
)
12749 switch (fieldp
->virtuality
)
12751 case DW_VIRTUALITY_virtual
:
12752 case DW_VIRTUALITY_pure_virtual
:
12753 if (cu
->language
== language_ada
)
12754 error (_("unexpected virtuality in component of Ada type"));
12755 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12762 /* Return true if this member function is a constructor, false
12766 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12768 const char *fieldname
;
12769 const char *type_name
;
12772 if (die
->parent
== NULL
)
12775 if (die
->parent
->tag
!= DW_TAG_structure_type
12776 && die
->parent
->tag
!= DW_TAG_union_type
12777 && die
->parent
->tag
!= DW_TAG_class_type
)
12780 fieldname
= dwarf2_name (die
, cu
);
12781 type_name
= dwarf2_name (die
->parent
, cu
);
12782 if (fieldname
== NULL
|| type_name
== NULL
)
12785 len
= strlen (fieldname
);
12786 return (strncmp (fieldname
, type_name
, len
) == 0
12787 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
12790 /* Add a member function to the proper fieldlist. */
12793 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12794 struct type
*type
, struct dwarf2_cu
*cu
)
12796 struct objfile
*objfile
= cu
->objfile
;
12797 struct attribute
*attr
;
12798 struct fnfieldlist
*flp
;
12800 struct fn_field
*fnp
;
12801 const char *fieldname
;
12802 struct nextfnfield
*new_fnfield
;
12803 struct type
*this_type
;
12804 enum dwarf_access_attribute accessibility
;
12806 if (cu
->language
== language_ada
)
12807 error (_("unexpected member function in Ada type"));
12809 /* Get name of member function. */
12810 fieldname
= dwarf2_name (die
, cu
);
12811 if (fieldname
== NULL
)
12814 /* Look up member function name in fieldlist. */
12815 for (i
= 0; i
< fip
->nfnfields
; i
++)
12817 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12821 /* Create new list element if necessary. */
12822 if (i
< fip
->nfnfields
)
12823 flp
= &fip
->fnfieldlists
[i
];
12826 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12828 fip
->fnfieldlists
= (struct fnfieldlist
*)
12829 xrealloc (fip
->fnfieldlists
,
12830 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12831 * sizeof (struct fnfieldlist
));
12832 if (fip
->nfnfields
== 0)
12833 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12835 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12836 flp
->name
= fieldname
;
12839 i
= fip
->nfnfields
++;
12842 /* Create a new member function field and chain it to the field list
12844 new_fnfield
= XNEW (struct nextfnfield
);
12845 make_cleanup (xfree
, new_fnfield
);
12846 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12847 new_fnfield
->next
= flp
->head
;
12848 flp
->head
= new_fnfield
;
12851 /* Fill in the member function field info. */
12852 fnp
= &new_fnfield
->fnfield
;
12854 /* Delay processing of the physname until later. */
12855 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12857 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12862 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12863 fnp
->physname
= physname
? physname
: "";
12866 fnp
->type
= alloc_type (objfile
);
12867 this_type
= read_type_die (die
, cu
);
12868 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12870 int nparams
= TYPE_NFIELDS (this_type
);
12872 /* TYPE is the domain of this method, and THIS_TYPE is the type
12873 of the method itself (TYPE_CODE_METHOD). */
12874 smash_to_method_type (fnp
->type
, type
,
12875 TYPE_TARGET_TYPE (this_type
),
12876 TYPE_FIELDS (this_type
),
12877 TYPE_NFIELDS (this_type
),
12878 TYPE_VARARGS (this_type
));
12880 /* Handle static member functions.
12881 Dwarf2 has no clean way to discern C++ static and non-static
12882 member functions. G++ helps GDB by marking the first
12883 parameter for non-static member functions (which is the this
12884 pointer) as artificial. We obtain this information from
12885 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12886 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12887 fnp
->voffset
= VOFFSET_STATIC
;
12890 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12891 dwarf2_full_name (fieldname
, die
, cu
));
12893 /* Get fcontext from DW_AT_containing_type if present. */
12894 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12895 fnp
->fcontext
= die_containing_type (die
, cu
);
12897 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12898 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12900 /* Get accessibility. */
12901 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12903 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
12905 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12906 switch (accessibility
)
12908 case DW_ACCESS_private
:
12909 fnp
->is_private
= 1;
12911 case DW_ACCESS_protected
:
12912 fnp
->is_protected
= 1;
12916 /* Check for artificial methods. */
12917 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12918 if (attr
&& DW_UNSND (attr
) != 0)
12919 fnp
->is_artificial
= 1;
12921 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12923 /* Get index in virtual function table if it is a virtual member
12924 function. For older versions of GCC, this is an offset in the
12925 appropriate virtual table, as specified by DW_AT_containing_type.
12926 For everyone else, it is an expression to be evaluated relative
12927 to the object address. */
12929 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12932 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12934 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12936 /* Old-style GCC. */
12937 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12939 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12940 || (DW_BLOCK (attr
)->size
> 1
12941 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12942 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12944 struct dwarf_block blk
;
12947 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12949 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12950 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12951 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12952 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12953 dwarf2_complex_location_expr_complaint ();
12955 fnp
->voffset
/= cu
->header
.addr_size
;
12959 dwarf2_complex_location_expr_complaint ();
12961 if (!fnp
->fcontext
)
12963 /* If there is no `this' field and no DW_AT_containing_type,
12964 we cannot actually find a base class context for the
12966 if (TYPE_NFIELDS (this_type
) == 0
12967 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
12969 complaint (&symfile_complaints
,
12970 _("cannot determine context for virtual member "
12971 "function \"%s\" (offset %d)"),
12972 fieldname
, die
->offset
.sect_off
);
12977 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12981 else if (attr_form_is_section_offset (attr
))
12983 dwarf2_complex_location_expr_complaint ();
12987 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12993 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12994 if (attr
&& DW_UNSND (attr
))
12996 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12997 complaint (&symfile_complaints
,
12998 _("Member function \"%s\" (offset %d) is virtual "
12999 "but the vtable offset is not specified"),
13000 fieldname
, die
->offset
.sect_off
);
13001 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13002 TYPE_CPLUS_DYNAMIC (type
) = 1;
13007 /* Create the vector of member function fields, and attach it to the type. */
13010 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13011 struct dwarf2_cu
*cu
)
13013 struct fnfieldlist
*flp
;
13016 if (cu
->language
== language_ada
)
13017 error (_("unexpected member functions in Ada type"));
13019 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13020 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13021 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13023 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13025 struct nextfnfield
*nfp
= flp
->head
;
13026 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13029 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13030 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13031 fn_flp
->fn_fields
= (struct fn_field
*)
13032 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13033 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13034 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13037 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13040 /* Returns non-zero if NAME is the name of a vtable member in CU's
13041 language, zero otherwise. */
13043 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13045 static const char vptr
[] = "_vptr";
13046 static const char vtable
[] = "vtable";
13048 /* Look for the C++ and Java forms of the vtable. */
13049 if ((cu
->language
== language_java
13050 && startswith (name
, vtable
))
13051 || (startswith (name
, vptr
)
13052 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
13058 /* GCC outputs unnamed structures that are really pointers to member
13059 functions, with the ABI-specified layout. If TYPE describes
13060 such a structure, smash it into a member function type.
13062 GCC shouldn't do this; it should just output pointer to member DIEs.
13063 This is GCC PR debug/28767. */
13066 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13068 struct type
*pfn_type
, *self_type
, *new_type
;
13070 /* Check for a structure with no name and two children. */
13071 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13074 /* Check for __pfn and __delta members. */
13075 if (TYPE_FIELD_NAME (type
, 0) == NULL
13076 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13077 || TYPE_FIELD_NAME (type
, 1) == NULL
13078 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13081 /* Find the type of the method. */
13082 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13083 if (pfn_type
== NULL
13084 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13085 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13088 /* Look for the "this" argument. */
13089 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13090 if (TYPE_NFIELDS (pfn_type
) == 0
13091 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13092 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13095 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13096 new_type
= alloc_type (objfile
);
13097 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13098 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13099 TYPE_VARARGS (pfn_type
));
13100 smash_to_methodptr_type (type
, new_type
);
13103 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13107 producer_is_icc (struct dwarf2_cu
*cu
)
13109 if (!cu
->checked_producer
)
13110 check_producer (cu
);
13112 return cu
->producer_is_icc
;
13115 /* Called when we find the DIE that starts a structure or union scope
13116 (definition) to create a type for the structure or union. Fill in
13117 the type's name and general properties; the members will not be
13118 processed until process_structure_scope. A symbol table entry for
13119 the type will also not be done until process_structure_scope (assuming
13120 the type has a name).
13122 NOTE: we need to call these functions regardless of whether or not the
13123 DIE has a DW_AT_name attribute, since it might be an anonymous
13124 structure or union. This gets the type entered into our set of
13125 user defined types. */
13127 static struct type
*
13128 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13130 struct objfile
*objfile
= cu
->objfile
;
13132 struct attribute
*attr
;
13135 /* If the definition of this type lives in .debug_types, read that type.
13136 Don't follow DW_AT_specification though, that will take us back up
13137 the chain and we want to go down. */
13138 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13141 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13143 /* The type's CU may not be the same as CU.
13144 Ensure TYPE is recorded with CU in die_type_hash. */
13145 return set_die_type (die
, type
, cu
);
13148 type
= alloc_type (objfile
);
13149 INIT_CPLUS_SPECIFIC (type
);
13151 name
= dwarf2_name (die
, cu
);
13154 if (cu
->language
== language_cplus
13155 || cu
->language
== language_java
13156 || cu
->language
== language_d
)
13158 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13160 /* dwarf2_full_name might have already finished building the DIE's
13161 type. If so, there is no need to continue. */
13162 if (get_die_type (die
, cu
) != NULL
)
13163 return get_die_type (die
, cu
);
13165 TYPE_TAG_NAME (type
) = full_name
;
13166 if (die
->tag
== DW_TAG_structure_type
13167 || die
->tag
== DW_TAG_class_type
)
13168 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13172 /* The name is already allocated along with this objfile, so
13173 we don't need to duplicate it for the type. */
13174 TYPE_TAG_NAME (type
) = name
;
13175 if (die
->tag
== DW_TAG_class_type
)
13176 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13180 if (die
->tag
== DW_TAG_structure_type
)
13182 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13184 else if (die
->tag
== DW_TAG_union_type
)
13186 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13190 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13193 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13194 TYPE_DECLARED_CLASS (type
) = 1;
13196 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13199 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13203 TYPE_LENGTH (type
) = 0;
13206 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13208 /* ICC does not output the required DW_AT_declaration
13209 on incomplete types, but gives them a size of zero. */
13210 TYPE_STUB (type
) = 1;
13213 TYPE_STUB_SUPPORTED (type
) = 1;
13215 if (die_is_declaration (die
, cu
))
13216 TYPE_STUB (type
) = 1;
13217 else if (attr
== NULL
&& die
->child
== NULL
13218 && producer_is_realview (cu
->producer
))
13219 /* RealView does not output the required DW_AT_declaration
13220 on incomplete types. */
13221 TYPE_STUB (type
) = 1;
13223 /* We need to add the type field to the die immediately so we don't
13224 infinitely recurse when dealing with pointers to the structure
13225 type within the structure itself. */
13226 set_die_type (die
, type
, cu
);
13228 /* set_die_type should be already done. */
13229 set_descriptive_type (type
, die
, cu
);
13234 /* Finish creating a structure or union type, including filling in
13235 its members and creating a symbol for it. */
13238 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13240 struct objfile
*objfile
= cu
->objfile
;
13241 struct die_info
*child_die
;
13244 type
= get_die_type (die
, cu
);
13246 type
= read_structure_type (die
, cu
);
13248 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13250 struct field_info fi
;
13251 VEC (symbolp
) *template_args
= NULL
;
13252 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13254 memset (&fi
, 0, sizeof (struct field_info
));
13256 child_die
= die
->child
;
13258 while (child_die
&& child_die
->tag
)
13260 if (child_die
->tag
== DW_TAG_member
13261 || child_die
->tag
== DW_TAG_variable
)
13263 /* NOTE: carlton/2002-11-05: A C++ static data member
13264 should be a DW_TAG_member that is a declaration, but
13265 all versions of G++ as of this writing (so through at
13266 least 3.2.1) incorrectly generate DW_TAG_variable
13267 tags for them instead. */
13268 dwarf2_add_field (&fi
, child_die
, cu
);
13270 else if (child_die
->tag
== DW_TAG_subprogram
)
13272 /* C++ member function. */
13273 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13275 else if (child_die
->tag
== DW_TAG_inheritance
)
13277 /* C++ base class field. */
13278 dwarf2_add_field (&fi
, child_die
, cu
);
13280 else if (child_die
->tag
== DW_TAG_typedef
)
13281 dwarf2_add_typedef (&fi
, child_die
, cu
);
13282 else if (child_die
->tag
== DW_TAG_template_type_param
13283 || child_die
->tag
== DW_TAG_template_value_param
)
13285 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13288 VEC_safe_push (symbolp
, template_args
, arg
);
13291 child_die
= sibling_die (child_die
);
13294 /* Attach template arguments to type. */
13295 if (! VEC_empty (symbolp
, template_args
))
13297 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13298 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13299 = VEC_length (symbolp
, template_args
);
13300 TYPE_TEMPLATE_ARGUMENTS (type
)
13301 = XOBNEWVEC (&objfile
->objfile_obstack
,
13303 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13304 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13305 VEC_address (symbolp
, template_args
),
13306 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13307 * sizeof (struct symbol
*)));
13308 VEC_free (symbolp
, template_args
);
13311 /* Attach fields and member functions to the type. */
13313 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13316 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13318 /* Get the type which refers to the base class (possibly this
13319 class itself) which contains the vtable pointer for the current
13320 class from the DW_AT_containing_type attribute. This use of
13321 DW_AT_containing_type is a GNU extension. */
13323 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13325 struct type
*t
= die_containing_type (die
, cu
);
13327 set_type_vptr_basetype (type
, t
);
13332 /* Our own class provides vtbl ptr. */
13333 for (i
= TYPE_NFIELDS (t
) - 1;
13334 i
>= TYPE_N_BASECLASSES (t
);
13337 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13339 if (is_vtable_name (fieldname
, cu
))
13341 set_type_vptr_fieldno (type
, i
);
13346 /* Complain if virtual function table field not found. */
13347 if (i
< TYPE_N_BASECLASSES (t
))
13348 complaint (&symfile_complaints
,
13349 _("virtual function table pointer "
13350 "not found when defining class '%s'"),
13351 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13356 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13359 else if (cu
->producer
13360 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13362 /* The IBM XLC compiler does not provide direct indication
13363 of the containing type, but the vtable pointer is
13364 always named __vfp. */
13368 for (i
= TYPE_NFIELDS (type
) - 1;
13369 i
>= TYPE_N_BASECLASSES (type
);
13372 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13374 set_type_vptr_fieldno (type
, i
);
13375 set_type_vptr_basetype (type
, type
);
13382 /* Copy fi.typedef_field_list linked list elements content into the
13383 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13384 if (fi
.typedef_field_list
)
13386 int i
= fi
.typedef_field_list_count
;
13388 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13389 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13390 = ((struct typedef_field
*)
13391 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13392 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13394 /* Reverse the list order to keep the debug info elements order. */
13397 struct typedef_field
*dest
, *src
;
13399 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13400 src
= &fi
.typedef_field_list
->field
;
13401 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13406 do_cleanups (back_to
);
13408 if (HAVE_CPLUS_STRUCT (type
))
13409 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13412 quirk_gcc_member_function_pointer (type
, objfile
);
13414 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13415 snapshots) has been known to create a die giving a declaration
13416 for a class that has, as a child, a die giving a definition for a
13417 nested class. So we have to process our children even if the
13418 current die is a declaration. Normally, of course, a declaration
13419 won't have any children at all. */
13421 child_die
= die
->child
;
13423 while (child_die
!= NULL
&& child_die
->tag
)
13425 if (child_die
->tag
== DW_TAG_member
13426 || child_die
->tag
== DW_TAG_variable
13427 || child_die
->tag
== DW_TAG_inheritance
13428 || child_die
->tag
== DW_TAG_template_value_param
13429 || child_die
->tag
== DW_TAG_template_type_param
)
13434 process_die (child_die
, cu
);
13436 child_die
= sibling_die (child_die
);
13439 /* Do not consider external references. According to the DWARF standard,
13440 these DIEs are identified by the fact that they have no byte_size
13441 attribute, and a declaration attribute. */
13442 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13443 || !die_is_declaration (die
, cu
))
13444 new_symbol (die
, type
, cu
);
13447 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13448 update TYPE using some information only available in DIE's children. */
13451 update_enumeration_type_from_children (struct die_info
*die
,
13453 struct dwarf2_cu
*cu
)
13455 struct obstack obstack
;
13456 struct die_info
*child_die
;
13457 int unsigned_enum
= 1;
13460 struct cleanup
*old_chain
;
13462 obstack_init (&obstack
);
13463 old_chain
= make_cleanup_obstack_free (&obstack
);
13465 for (child_die
= die
->child
;
13466 child_die
!= NULL
&& child_die
->tag
;
13467 child_die
= sibling_die (child_die
))
13469 struct attribute
*attr
;
13471 const gdb_byte
*bytes
;
13472 struct dwarf2_locexpr_baton
*baton
;
13475 if (child_die
->tag
!= DW_TAG_enumerator
)
13478 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13482 name
= dwarf2_name (child_die
, cu
);
13484 name
= "<anonymous enumerator>";
13486 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13487 &value
, &bytes
, &baton
);
13493 else if ((mask
& value
) != 0)
13498 /* If we already know that the enum type is neither unsigned, nor
13499 a flag type, no need to look at the rest of the enumerates. */
13500 if (!unsigned_enum
&& !flag_enum
)
13505 TYPE_UNSIGNED (type
) = 1;
13507 TYPE_FLAG_ENUM (type
) = 1;
13509 do_cleanups (old_chain
);
13512 /* Given a DW_AT_enumeration_type die, set its type. We do not
13513 complete the type's fields yet, or create any symbols. */
13515 static struct type
*
13516 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13518 struct objfile
*objfile
= cu
->objfile
;
13520 struct attribute
*attr
;
13523 /* If the definition of this type lives in .debug_types, read that type.
13524 Don't follow DW_AT_specification though, that will take us back up
13525 the chain and we want to go down. */
13526 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13529 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13531 /* The type's CU may not be the same as CU.
13532 Ensure TYPE is recorded with CU in die_type_hash. */
13533 return set_die_type (die
, type
, cu
);
13536 type
= alloc_type (objfile
);
13538 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13539 name
= dwarf2_full_name (NULL
, die
, cu
);
13541 TYPE_TAG_NAME (type
) = name
;
13543 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13546 struct type
*underlying_type
= die_type (die
, cu
);
13548 TYPE_TARGET_TYPE (type
) = underlying_type
;
13551 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13554 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13558 TYPE_LENGTH (type
) = 0;
13561 /* The enumeration DIE can be incomplete. In Ada, any type can be
13562 declared as private in the package spec, and then defined only
13563 inside the package body. Such types are known as Taft Amendment
13564 Types. When another package uses such a type, an incomplete DIE
13565 may be generated by the compiler. */
13566 if (die_is_declaration (die
, cu
))
13567 TYPE_STUB (type
) = 1;
13569 /* Finish the creation of this type by using the enum's children.
13570 We must call this even when the underlying type has been provided
13571 so that we can determine if we're looking at a "flag" enum. */
13572 update_enumeration_type_from_children (die
, type
, cu
);
13574 /* If this type has an underlying type that is not a stub, then we
13575 may use its attributes. We always use the "unsigned" attribute
13576 in this situation, because ordinarily we guess whether the type
13577 is unsigned -- but the guess can be wrong and the underlying type
13578 can tell us the reality. However, we defer to a local size
13579 attribute if one exists, because this lets the compiler override
13580 the underlying type if needed. */
13581 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13583 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13584 if (TYPE_LENGTH (type
) == 0)
13585 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13588 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13590 return set_die_type (die
, type
, cu
);
13593 /* Given a pointer to a die which begins an enumeration, process all
13594 the dies that define the members of the enumeration, and create the
13595 symbol for the enumeration type.
13597 NOTE: We reverse the order of the element list. */
13600 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13602 struct type
*this_type
;
13604 this_type
= get_die_type (die
, cu
);
13605 if (this_type
== NULL
)
13606 this_type
= read_enumeration_type (die
, cu
);
13608 if (die
->child
!= NULL
)
13610 struct die_info
*child_die
;
13611 struct symbol
*sym
;
13612 struct field
*fields
= NULL
;
13613 int num_fields
= 0;
13616 child_die
= die
->child
;
13617 while (child_die
&& child_die
->tag
)
13619 if (child_die
->tag
!= DW_TAG_enumerator
)
13621 process_die (child_die
, cu
);
13625 name
= dwarf2_name (child_die
, cu
);
13628 sym
= new_symbol (child_die
, this_type
, cu
);
13630 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13632 fields
= (struct field
*)
13634 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13635 * sizeof (struct field
));
13638 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13639 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13640 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13641 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13647 child_die
= sibling_die (child_die
);
13652 TYPE_NFIELDS (this_type
) = num_fields
;
13653 TYPE_FIELDS (this_type
) = (struct field
*)
13654 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13655 memcpy (TYPE_FIELDS (this_type
), fields
,
13656 sizeof (struct field
) * num_fields
);
13661 /* If we are reading an enum from a .debug_types unit, and the enum
13662 is a declaration, and the enum is not the signatured type in the
13663 unit, then we do not want to add a symbol for it. Adding a
13664 symbol would in some cases obscure the true definition of the
13665 enum, giving users an incomplete type when the definition is
13666 actually available. Note that we do not want to do this for all
13667 enums which are just declarations, because C++0x allows forward
13668 enum declarations. */
13669 if (cu
->per_cu
->is_debug_types
13670 && die_is_declaration (die
, cu
))
13672 struct signatured_type
*sig_type
;
13674 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13675 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13676 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13680 new_symbol (die
, this_type
, cu
);
13683 /* Extract all information from a DW_TAG_array_type DIE and put it in
13684 the DIE's type field. For now, this only handles one dimensional
13687 static struct type
*
13688 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13690 struct objfile
*objfile
= cu
->objfile
;
13691 struct die_info
*child_die
;
13693 struct type
*element_type
, *range_type
, *index_type
;
13694 struct type
**range_types
= NULL
;
13695 struct attribute
*attr
;
13697 struct cleanup
*back_to
;
13699 unsigned int bit_stride
= 0;
13701 element_type
= die_type (die
, cu
);
13703 /* The die_type call above may have already set the type for this DIE. */
13704 type
= get_die_type (die
, cu
);
13708 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13710 bit_stride
= DW_UNSND (attr
) * 8;
13712 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13714 bit_stride
= DW_UNSND (attr
);
13716 /* Irix 6.2 native cc creates array types without children for
13717 arrays with unspecified length. */
13718 if (die
->child
== NULL
)
13720 index_type
= objfile_type (objfile
)->builtin_int
;
13721 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13722 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13724 return set_die_type (die
, type
, cu
);
13727 back_to
= make_cleanup (null_cleanup
, NULL
);
13728 child_die
= die
->child
;
13729 while (child_die
&& child_die
->tag
)
13731 if (child_die
->tag
== DW_TAG_subrange_type
)
13733 struct type
*child_type
= read_type_die (child_die
, cu
);
13735 if (child_type
!= NULL
)
13737 /* The range type was succesfully read. Save it for the
13738 array type creation. */
13739 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13741 range_types
= (struct type
**)
13742 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13743 * sizeof (struct type
*));
13745 make_cleanup (free_current_contents
, &range_types
);
13747 range_types
[ndim
++] = child_type
;
13750 child_die
= sibling_die (child_die
);
13753 /* Dwarf2 dimensions are output from left to right, create the
13754 necessary array types in backwards order. */
13756 type
= element_type
;
13758 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13763 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13769 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13773 /* Understand Dwarf2 support for vector types (like they occur on
13774 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13775 array type. This is not part of the Dwarf2/3 standard yet, but a
13776 custom vendor extension. The main difference between a regular
13777 array and the vector variant is that vectors are passed by value
13779 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13781 make_vector_type (type
);
13783 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13784 implementation may choose to implement triple vectors using this
13786 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13789 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13790 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13792 complaint (&symfile_complaints
,
13793 _("DW_AT_byte_size for array type smaller "
13794 "than the total size of elements"));
13797 name
= dwarf2_name (die
, cu
);
13799 TYPE_NAME (type
) = name
;
13801 /* Install the type in the die. */
13802 set_die_type (die
, type
, cu
);
13804 /* set_die_type should be already done. */
13805 set_descriptive_type (type
, die
, cu
);
13807 do_cleanups (back_to
);
13812 static enum dwarf_array_dim_ordering
13813 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13815 struct attribute
*attr
;
13817 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13820 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
13822 /* GNU F77 is a special case, as at 08/2004 array type info is the
13823 opposite order to the dwarf2 specification, but data is still
13824 laid out as per normal fortran.
13826 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13827 version checking. */
13829 if (cu
->language
== language_fortran
13830 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13832 return DW_ORD_row_major
;
13835 switch (cu
->language_defn
->la_array_ordering
)
13837 case array_column_major
:
13838 return DW_ORD_col_major
;
13839 case array_row_major
:
13841 return DW_ORD_row_major
;
13845 /* Extract all information from a DW_TAG_set_type DIE and put it in
13846 the DIE's type field. */
13848 static struct type
*
13849 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13851 struct type
*domain_type
, *set_type
;
13852 struct attribute
*attr
;
13854 domain_type
= die_type (die
, cu
);
13856 /* The die_type call above may have already set the type for this DIE. */
13857 set_type
= get_die_type (die
, cu
);
13861 set_type
= create_set_type (NULL
, domain_type
);
13863 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13865 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13867 return set_die_type (die
, set_type
, cu
);
13870 /* A helper for read_common_block that creates a locexpr baton.
13871 SYM is the symbol which we are marking as computed.
13872 COMMON_DIE is the DIE for the common block.
13873 COMMON_LOC is the location expression attribute for the common
13875 MEMBER_LOC is the location expression attribute for the particular
13876 member of the common block that we are processing.
13877 CU is the CU from which the above come. */
13880 mark_common_block_symbol_computed (struct symbol
*sym
,
13881 struct die_info
*common_die
,
13882 struct attribute
*common_loc
,
13883 struct attribute
*member_loc
,
13884 struct dwarf2_cu
*cu
)
13886 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13887 struct dwarf2_locexpr_baton
*baton
;
13889 unsigned int cu_off
;
13890 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13891 LONGEST offset
= 0;
13893 gdb_assert (common_loc
&& member_loc
);
13894 gdb_assert (attr_form_is_block (common_loc
));
13895 gdb_assert (attr_form_is_block (member_loc
)
13896 || attr_form_is_constant (member_loc
));
13898 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13899 baton
->per_cu
= cu
->per_cu
;
13900 gdb_assert (baton
->per_cu
);
13902 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13904 if (attr_form_is_constant (member_loc
))
13906 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13907 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13910 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13912 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13915 *ptr
++ = DW_OP_call4
;
13916 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13917 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13920 if (attr_form_is_constant (member_loc
))
13922 *ptr
++ = DW_OP_addr
;
13923 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13924 ptr
+= cu
->header
.addr_size
;
13928 /* We have to copy the data here, because DW_OP_call4 will only
13929 use a DW_AT_location attribute. */
13930 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13931 ptr
+= DW_BLOCK (member_loc
)->size
;
13934 *ptr
++ = DW_OP_plus
;
13935 gdb_assert (ptr
- baton
->data
== baton
->size
);
13937 SYMBOL_LOCATION_BATON (sym
) = baton
;
13938 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13941 /* Create appropriate locally-scoped variables for all the
13942 DW_TAG_common_block entries. Also create a struct common_block
13943 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13944 is used to sepate the common blocks name namespace from regular
13948 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13950 struct attribute
*attr
;
13952 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13955 /* Support the .debug_loc offsets. */
13956 if (attr_form_is_block (attr
))
13960 else if (attr_form_is_section_offset (attr
))
13962 dwarf2_complex_location_expr_complaint ();
13967 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13968 "common block member");
13973 if (die
->child
!= NULL
)
13975 struct objfile
*objfile
= cu
->objfile
;
13976 struct die_info
*child_die
;
13977 size_t n_entries
= 0, size
;
13978 struct common_block
*common_block
;
13979 struct symbol
*sym
;
13981 for (child_die
= die
->child
;
13982 child_die
&& child_die
->tag
;
13983 child_die
= sibling_die (child_die
))
13986 size
= (sizeof (struct common_block
)
13987 + (n_entries
- 1) * sizeof (struct symbol
*));
13989 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
13991 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13992 common_block
->n_entries
= 0;
13994 for (child_die
= die
->child
;
13995 child_die
&& child_die
->tag
;
13996 child_die
= sibling_die (child_die
))
13998 /* Create the symbol in the DW_TAG_common_block block in the current
14000 sym
= new_symbol (child_die
, NULL
, cu
);
14003 struct attribute
*member_loc
;
14005 common_block
->contents
[common_block
->n_entries
++] = sym
;
14007 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14011 /* GDB has handled this for a long time, but it is
14012 not specified by DWARF. It seems to have been
14013 emitted by gfortran at least as recently as:
14014 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14015 complaint (&symfile_complaints
,
14016 _("Variable in common block has "
14017 "DW_AT_data_member_location "
14018 "- DIE at 0x%x [in module %s]"),
14019 child_die
->offset
.sect_off
,
14020 objfile_name (cu
->objfile
));
14022 if (attr_form_is_section_offset (member_loc
))
14023 dwarf2_complex_location_expr_complaint ();
14024 else if (attr_form_is_constant (member_loc
)
14025 || attr_form_is_block (member_loc
))
14028 mark_common_block_symbol_computed (sym
, die
, attr
,
14032 dwarf2_complex_location_expr_complaint ();
14037 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14038 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14042 /* Create a type for a C++ namespace. */
14044 static struct type
*
14045 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14047 struct objfile
*objfile
= cu
->objfile
;
14048 const char *previous_prefix
, *name
;
14052 /* For extensions, reuse the type of the original namespace. */
14053 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14055 struct die_info
*ext_die
;
14056 struct dwarf2_cu
*ext_cu
= cu
;
14058 ext_die
= dwarf2_extension (die
, &ext_cu
);
14059 type
= read_type_die (ext_die
, ext_cu
);
14061 /* EXT_CU may not be the same as CU.
14062 Ensure TYPE is recorded with CU in die_type_hash. */
14063 return set_die_type (die
, type
, cu
);
14066 name
= namespace_name (die
, &is_anonymous
, cu
);
14068 /* Now build the name of the current namespace. */
14070 previous_prefix
= determine_prefix (die
, cu
);
14071 if (previous_prefix
[0] != '\0')
14072 name
= typename_concat (&objfile
->objfile_obstack
,
14073 previous_prefix
, name
, 0, cu
);
14075 /* Create the type. */
14076 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14078 TYPE_NAME (type
) = name
;
14079 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14081 return set_die_type (die
, type
, cu
);
14084 /* Read a namespace scope. */
14087 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14089 struct objfile
*objfile
= cu
->objfile
;
14092 /* Add a symbol associated to this if we haven't seen the namespace
14093 before. Also, add a using directive if it's an anonymous
14096 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14100 type
= read_type_die (die
, cu
);
14101 new_symbol (die
, type
, cu
);
14103 namespace_name (die
, &is_anonymous
, cu
);
14106 const char *previous_prefix
= determine_prefix (die
, cu
);
14108 add_using_directive (using_directives (cu
->language
),
14109 previous_prefix
, TYPE_NAME (type
), NULL
,
14110 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14114 if (die
->child
!= NULL
)
14116 struct die_info
*child_die
= die
->child
;
14118 while (child_die
&& child_die
->tag
)
14120 process_die (child_die
, cu
);
14121 child_die
= sibling_die (child_die
);
14126 /* Read a Fortran module as type. This DIE can be only a declaration used for
14127 imported module. Still we need that type as local Fortran "use ... only"
14128 declaration imports depend on the created type in determine_prefix. */
14130 static struct type
*
14131 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14133 struct objfile
*objfile
= cu
->objfile
;
14134 const char *module_name
;
14137 module_name
= dwarf2_name (die
, cu
);
14139 complaint (&symfile_complaints
,
14140 _("DW_TAG_module has no name, offset 0x%x"),
14141 die
->offset
.sect_off
);
14142 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14144 /* determine_prefix uses TYPE_TAG_NAME. */
14145 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14147 return set_die_type (die
, type
, cu
);
14150 /* Read a Fortran module. */
14153 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14155 struct die_info
*child_die
= die
->child
;
14158 type
= read_type_die (die
, cu
);
14159 new_symbol (die
, type
, cu
);
14161 while (child_die
&& child_die
->tag
)
14163 process_die (child_die
, cu
);
14164 child_die
= sibling_die (child_die
);
14168 /* Return the name of the namespace represented by DIE. Set
14169 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14172 static const char *
14173 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14175 struct die_info
*current_die
;
14176 const char *name
= NULL
;
14178 /* Loop through the extensions until we find a name. */
14180 for (current_die
= die
;
14181 current_die
!= NULL
;
14182 current_die
= dwarf2_extension (die
, &cu
))
14184 /* We don't use dwarf2_name here so that we can detect the absence
14185 of a name -> anonymous namespace. */
14186 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14192 /* Is it an anonymous namespace? */
14194 *is_anonymous
= (name
== NULL
);
14196 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14201 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14202 the user defined type vector. */
14204 static struct type
*
14205 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14207 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14208 struct comp_unit_head
*cu_header
= &cu
->header
;
14210 struct attribute
*attr_byte_size
;
14211 struct attribute
*attr_address_class
;
14212 int byte_size
, addr_class
;
14213 struct type
*target_type
;
14215 target_type
= die_type (die
, cu
);
14217 /* The die_type call above may have already set the type for this DIE. */
14218 type
= get_die_type (die
, cu
);
14222 type
= lookup_pointer_type (target_type
);
14224 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14225 if (attr_byte_size
)
14226 byte_size
= DW_UNSND (attr_byte_size
);
14228 byte_size
= cu_header
->addr_size
;
14230 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14231 if (attr_address_class
)
14232 addr_class
= DW_UNSND (attr_address_class
);
14234 addr_class
= DW_ADDR_none
;
14236 /* If the pointer size or address class is different than the
14237 default, create a type variant marked as such and set the
14238 length accordingly. */
14239 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14241 if (gdbarch_address_class_type_flags_p (gdbarch
))
14245 type_flags
= gdbarch_address_class_type_flags
14246 (gdbarch
, byte_size
, addr_class
);
14247 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14249 type
= make_type_with_address_space (type
, type_flags
);
14251 else if (TYPE_LENGTH (type
) != byte_size
)
14253 complaint (&symfile_complaints
,
14254 _("invalid pointer size %d"), byte_size
);
14258 /* Should we also complain about unhandled address classes? */
14262 TYPE_LENGTH (type
) = byte_size
;
14263 return set_die_type (die
, type
, cu
);
14266 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14267 the user defined type vector. */
14269 static struct type
*
14270 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14273 struct type
*to_type
;
14274 struct type
*domain
;
14276 to_type
= die_type (die
, cu
);
14277 domain
= die_containing_type (die
, cu
);
14279 /* The calls above may have already set the type for this DIE. */
14280 type
= get_die_type (die
, cu
);
14284 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14285 type
= lookup_methodptr_type (to_type
);
14286 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14288 struct type
*new_type
= alloc_type (cu
->objfile
);
14290 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14291 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14292 TYPE_VARARGS (to_type
));
14293 type
= lookup_methodptr_type (new_type
);
14296 type
= lookup_memberptr_type (to_type
, domain
);
14298 return set_die_type (die
, type
, cu
);
14301 /* Extract all information from a DW_TAG_reference_type DIE and add to
14302 the user defined type vector. */
14304 static struct type
*
14305 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14307 struct comp_unit_head
*cu_header
= &cu
->header
;
14308 struct type
*type
, *target_type
;
14309 struct attribute
*attr
;
14311 target_type
= die_type (die
, cu
);
14313 /* The die_type call above may have already set the type for this DIE. */
14314 type
= get_die_type (die
, cu
);
14318 type
= lookup_reference_type (target_type
);
14319 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14322 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14326 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14328 return set_die_type (die
, type
, cu
);
14331 /* Add the given cv-qualifiers to the element type of the array. GCC
14332 outputs DWARF type qualifiers that apply to an array, not the
14333 element type. But GDB relies on the array element type to carry
14334 the cv-qualifiers. This mimics section 6.7.3 of the C99
14337 static struct type
*
14338 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14339 struct type
*base_type
, int cnst
, int voltl
)
14341 struct type
*el_type
, *inner_array
;
14343 base_type
= copy_type (base_type
);
14344 inner_array
= base_type
;
14346 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14348 TYPE_TARGET_TYPE (inner_array
) =
14349 copy_type (TYPE_TARGET_TYPE (inner_array
));
14350 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14353 el_type
= TYPE_TARGET_TYPE (inner_array
);
14354 cnst
|= TYPE_CONST (el_type
);
14355 voltl
|= TYPE_VOLATILE (el_type
);
14356 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14358 return set_die_type (die
, base_type
, cu
);
14361 static struct type
*
14362 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14364 struct type
*base_type
, *cv_type
;
14366 base_type
= die_type (die
, cu
);
14368 /* The die_type call above may have already set the type for this DIE. */
14369 cv_type
= get_die_type (die
, cu
);
14373 /* In case the const qualifier is applied to an array type, the element type
14374 is so qualified, not the array type (section 6.7.3 of C99). */
14375 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14376 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14378 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14379 return set_die_type (die
, cv_type
, cu
);
14382 static struct type
*
14383 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14385 struct type
*base_type
, *cv_type
;
14387 base_type
= die_type (die
, cu
);
14389 /* The die_type call above may have already set the type for this DIE. */
14390 cv_type
= get_die_type (die
, cu
);
14394 /* In case the volatile qualifier is applied to an array type, the
14395 element type is so qualified, not the array type (section 6.7.3
14397 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14398 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14400 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14401 return set_die_type (die
, cv_type
, cu
);
14404 /* Handle DW_TAG_restrict_type. */
14406 static struct type
*
14407 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14409 struct type
*base_type
, *cv_type
;
14411 base_type
= die_type (die
, cu
);
14413 /* The die_type call above may have already set the type for this DIE. */
14414 cv_type
= get_die_type (die
, cu
);
14418 cv_type
= make_restrict_type (base_type
);
14419 return set_die_type (die
, cv_type
, cu
);
14422 /* Handle DW_TAG_atomic_type. */
14424 static struct type
*
14425 read_tag_atomic_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 cv_type
= make_atomic_type (base_type
);
14437 return set_die_type (die
, cv_type
, cu
);
14440 /* Extract all information from a DW_TAG_string_type DIE and add to
14441 the user defined type vector. It isn't really a user defined type,
14442 but it behaves like one, with other DIE's using an AT_user_def_type
14443 attribute to reference it. */
14445 static struct type
*
14446 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14448 struct objfile
*objfile
= cu
->objfile
;
14449 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14450 struct type
*type
, *range_type
, *index_type
, *char_type
;
14451 struct attribute
*attr
;
14452 unsigned int length
;
14454 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14457 length
= DW_UNSND (attr
);
14461 /* Check for the DW_AT_byte_size attribute. */
14462 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14465 length
= DW_UNSND (attr
);
14473 index_type
= objfile_type (objfile
)->builtin_int
;
14474 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14475 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14476 type
= create_string_type (NULL
, char_type
, range_type
);
14478 return set_die_type (die
, type
, cu
);
14481 /* Assuming that DIE corresponds to a function, returns nonzero
14482 if the function is prototyped. */
14485 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14487 struct attribute
*attr
;
14489 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14490 if (attr
&& (DW_UNSND (attr
) != 0))
14493 /* The DWARF standard implies that the DW_AT_prototyped attribute
14494 is only meaninful for C, but the concept also extends to other
14495 languages that allow unprototyped functions (Eg: Objective C).
14496 For all other languages, assume that functions are always
14498 if (cu
->language
!= language_c
14499 && cu
->language
!= language_objc
14500 && cu
->language
!= language_opencl
)
14503 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14504 prototyped and unprototyped functions; default to prototyped,
14505 since that is more common in modern code (and RealView warns
14506 about unprototyped functions). */
14507 if (producer_is_realview (cu
->producer
))
14513 /* Handle DIES due to C code like:
14517 int (*funcp)(int a, long l);
14521 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14523 static struct type
*
14524 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14526 struct objfile
*objfile
= cu
->objfile
;
14527 struct type
*type
; /* Type that this function returns. */
14528 struct type
*ftype
; /* Function that returns above type. */
14529 struct attribute
*attr
;
14531 type
= die_type (die
, cu
);
14533 /* The die_type call above may have already set the type for this DIE. */
14534 ftype
= get_die_type (die
, cu
);
14538 ftype
= lookup_function_type (type
);
14540 if (prototyped_function_p (die
, cu
))
14541 TYPE_PROTOTYPED (ftype
) = 1;
14543 /* Store the calling convention in the type if it's available in
14544 the subroutine die. Otherwise set the calling convention to
14545 the default value DW_CC_normal. */
14546 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14548 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14549 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14550 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14552 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14554 /* Record whether the function returns normally to its caller or not
14555 if the DWARF producer set that information. */
14556 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14557 if (attr
&& (DW_UNSND (attr
) != 0))
14558 TYPE_NO_RETURN (ftype
) = 1;
14560 /* We need to add the subroutine type to the die immediately so
14561 we don't infinitely recurse when dealing with parameters
14562 declared as the same subroutine type. */
14563 set_die_type (die
, ftype
, cu
);
14565 if (die
->child
!= NULL
)
14567 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14568 struct die_info
*child_die
;
14569 int nparams
, iparams
;
14571 /* Count the number of parameters.
14572 FIXME: GDB currently ignores vararg functions, but knows about
14573 vararg member functions. */
14575 child_die
= die
->child
;
14576 while (child_die
&& child_die
->tag
)
14578 if (child_die
->tag
== DW_TAG_formal_parameter
)
14580 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14581 TYPE_VARARGS (ftype
) = 1;
14582 child_die
= sibling_die (child_die
);
14585 /* Allocate storage for parameters and fill them in. */
14586 TYPE_NFIELDS (ftype
) = nparams
;
14587 TYPE_FIELDS (ftype
) = (struct field
*)
14588 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14590 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14591 even if we error out during the parameters reading below. */
14592 for (iparams
= 0; iparams
< nparams
; iparams
++)
14593 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14596 child_die
= die
->child
;
14597 while (child_die
&& child_die
->tag
)
14599 if (child_die
->tag
== DW_TAG_formal_parameter
)
14601 struct type
*arg_type
;
14603 /* DWARF version 2 has no clean way to discern C++
14604 static and non-static member functions. G++ helps
14605 GDB by marking the first parameter for non-static
14606 member functions (which is the this pointer) as
14607 artificial. We pass this information to
14608 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14610 DWARF version 3 added DW_AT_object_pointer, which GCC
14611 4.5 does not yet generate. */
14612 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14614 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14617 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14619 /* GCC/43521: In java, the formal parameter
14620 "this" is sometimes not marked with DW_AT_artificial. */
14621 if (cu
->language
== language_java
)
14623 const char *name
= dwarf2_name (child_die
, cu
);
14625 if (name
&& !strcmp (name
, "this"))
14626 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14629 arg_type
= die_type (child_die
, cu
);
14631 /* RealView does not mark THIS as const, which the testsuite
14632 expects. GCC marks THIS as const in method definitions,
14633 but not in the class specifications (GCC PR 43053). */
14634 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14635 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14638 struct dwarf2_cu
*arg_cu
= cu
;
14639 const char *name
= dwarf2_name (child_die
, cu
);
14641 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14644 /* If the compiler emits this, use it. */
14645 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14648 else if (name
&& strcmp (name
, "this") == 0)
14649 /* Function definitions will have the argument names. */
14651 else if (name
== NULL
&& iparams
== 0)
14652 /* Declarations may not have the names, so like
14653 elsewhere in GDB, assume an artificial first
14654 argument is "this". */
14658 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14662 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14665 child_die
= sibling_die (child_die
);
14672 static struct type
*
14673 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14675 struct objfile
*objfile
= cu
->objfile
;
14676 const char *name
= NULL
;
14677 struct type
*this_type
, *target_type
;
14679 name
= dwarf2_full_name (NULL
, die
, cu
);
14680 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14681 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14682 TYPE_NAME (this_type
) = name
;
14683 set_die_type (die
, this_type
, cu
);
14684 target_type
= die_type (die
, cu
);
14685 if (target_type
!= this_type
)
14686 TYPE_TARGET_TYPE (this_type
) = target_type
;
14689 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14690 spec and cause infinite loops in GDB. */
14691 complaint (&symfile_complaints
,
14692 _("Self-referential DW_TAG_typedef "
14693 "- DIE at 0x%x [in module %s]"),
14694 die
->offset
.sect_off
, objfile_name (objfile
));
14695 TYPE_TARGET_TYPE (this_type
) = NULL
;
14700 /* Find a representation of a given base type and install
14701 it in the TYPE field of the die. */
14703 static struct type
*
14704 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14706 struct objfile
*objfile
= cu
->objfile
;
14708 struct attribute
*attr
;
14709 int encoding
= 0, size
= 0;
14711 enum type_code code
= TYPE_CODE_INT
;
14712 int type_flags
= 0;
14713 struct type
*target_type
= NULL
;
14715 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14718 encoding
= DW_UNSND (attr
);
14720 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14723 size
= DW_UNSND (attr
);
14725 name
= dwarf2_name (die
, cu
);
14728 complaint (&symfile_complaints
,
14729 _("DW_AT_name missing from DW_TAG_base_type"));
14734 case DW_ATE_address
:
14735 /* Turn DW_ATE_address into a void * pointer. */
14736 code
= TYPE_CODE_PTR
;
14737 type_flags
|= TYPE_FLAG_UNSIGNED
;
14738 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14740 case DW_ATE_boolean
:
14741 code
= TYPE_CODE_BOOL
;
14742 type_flags
|= TYPE_FLAG_UNSIGNED
;
14744 case DW_ATE_complex_float
:
14745 code
= TYPE_CODE_COMPLEX
;
14746 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14748 case DW_ATE_decimal_float
:
14749 code
= TYPE_CODE_DECFLOAT
;
14752 code
= TYPE_CODE_FLT
;
14754 case DW_ATE_signed
:
14756 case DW_ATE_unsigned
:
14757 type_flags
|= TYPE_FLAG_UNSIGNED
;
14758 if (cu
->language
== language_fortran
14760 && startswith (name
, "character("))
14761 code
= TYPE_CODE_CHAR
;
14763 case DW_ATE_signed_char
:
14764 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14765 || cu
->language
== language_pascal
14766 || cu
->language
== language_fortran
)
14767 code
= TYPE_CODE_CHAR
;
14769 case DW_ATE_unsigned_char
:
14770 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14771 || cu
->language
== language_pascal
14772 || cu
->language
== language_fortran
)
14773 code
= TYPE_CODE_CHAR
;
14774 type_flags
|= TYPE_FLAG_UNSIGNED
;
14777 /* We just treat this as an integer and then recognize the
14778 type by name elsewhere. */
14782 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14783 dwarf_type_encoding_name (encoding
));
14787 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14788 TYPE_NAME (type
) = name
;
14789 TYPE_TARGET_TYPE (type
) = target_type
;
14791 if (name
&& strcmp (name
, "char") == 0)
14792 TYPE_NOSIGN (type
) = 1;
14794 return set_die_type (die
, type
, cu
);
14797 /* Parse dwarf attribute if it's a block, reference or constant and put the
14798 resulting value of the attribute into struct bound_prop.
14799 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14802 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14803 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14805 struct dwarf2_property_baton
*baton
;
14806 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14808 if (attr
== NULL
|| prop
== NULL
)
14811 if (attr_form_is_block (attr
))
14813 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14814 baton
->referenced_type
= NULL
;
14815 baton
->locexpr
.per_cu
= cu
->per_cu
;
14816 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14817 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14818 prop
->data
.baton
= baton
;
14819 prop
->kind
= PROP_LOCEXPR
;
14820 gdb_assert (prop
->data
.baton
!= NULL
);
14822 else if (attr_form_is_ref (attr
))
14824 struct dwarf2_cu
*target_cu
= cu
;
14825 struct die_info
*target_die
;
14826 struct attribute
*target_attr
;
14828 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14829 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14830 if (target_attr
== NULL
)
14831 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14833 if (target_attr
== NULL
)
14836 switch (target_attr
->name
)
14838 case DW_AT_location
:
14839 if (attr_form_is_section_offset (target_attr
))
14841 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14842 baton
->referenced_type
= die_type (target_die
, target_cu
);
14843 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14844 prop
->data
.baton
= baton
;
14845 prop
->kind
= PROP_LOCLIST
;
14846 gdb_assert (prop
->data
.baton
!= NULL
);
14848 else if (attr_form_is_block (target_attr
))
14850 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14851 baton
->referenced_type
= die_type (target_die
, target_cu
);
14852 baton
->locexpr
.per_cu
= cu
->per_cu
;
14853 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14854 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14855 prop
->data
.baton
= baton
;
14856 prop
->kind
= PROP_LOCEXPR
;
14857 gdb_assert (prop
->data
.baton
!= NULL
);
14861 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14862 "dynamic property");
14866 case DW_AT_data_member_location
:
14870 if (!handle_data_member_location (target_die
, target_cu
,
14874 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
14875 baton
->referenced_type
= read_type_die (target_die
->parent
,
14877 baton
->offset_info
.offset
= offset
;
14878 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14879 prop
->data
.baton
= baton
;
14880 prop
->kind
= PROP_ADDR_OFFSET
;
14885 else if (attr_form_is_constant (attr
))
14887 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14888 prop
->kind
= PROP_CONST
;
14892 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14893 dwarf2_name (die
, cu
));
14900 /* Read the given DW_AT_subrange DIE. */
14902 static struct type
*
14903 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14905 struct type
*base_type
, *orig_base_type
;
14906 struct type
*range_type
;
14907 struct attribute
*attr
;
14908 struct dynamic_prop low
, high
;
14909 int low_default_is_valid
;
14910 int high_bound_is_count
= 0;
14912 LONGEST negative_mask
;
14914 orig_base_type
= die_type (die
, cu
);
14915 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14916 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14917 creating the range type, but we use the result of check_typedef
14918 when examining properties of the type. */
14919 base_type
= check_typedef (orig_base_type
);
14921 /* The die_type call above may have already set the type for this DIE. */
14922 range_type
= get_die_type (die
, cu
);
14926 low
.kind
= PROP_CONST
;
14927 high
.kind
= PROP_CONST
;
14928 high
.data
.const_val
= 0;
14930 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14931 omitting DW_AT_lower_bound. */
14932 switch (cu
->language
)
14935 case language_cplus
:
14936 low
.data
.const_val
= 0;
14937 low_default_is_valid
= 1;
14939 case language_fortran
:
14940 low
.data
.const_val
= 1;
14941 low_default_is_valid
= 1;
14944 case language_java
:
14945 case language_objc
:
14946 low
.data
.const_val
= 0;
14947 low_default_is_valid
= (cu
->header
.version
>= 4);
14951 case language_pascal
:
14952 low
.data
.const_val
= 1;
14953 low_default_is_valid
= (cu
->header
.version
>= 4);
14956 low
.data
.const_val
= 0;
14957 low_default_is_valid
= 0;
14961 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14963 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14964 else if (!low_default_is_valid
)
14965 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14966 "- DIE at 0x%x [in module %s]"),
14967 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14969 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14970 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14972 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14973 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14975 /* If bounds are constant do the final calculation here. */
14976 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14977 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14979 high_bound_is_count
= 1;
14983 /* Dwarf-2 specifications explicitly allows to create subrange types
14984 without specifying a base type.
14985 In that case, the base type must be set to the type of
14986 the lower bound, upper bound or count, in that order, if any of these
14987 three attributes references an object that has a type.
14988 If no base type is found, the Dwarf-2 specifications say that
14989 a signed integer type of size equal to the size of an address should
14991 For the following C code: `extern char gdb_int [];'
14992 GCC produces an empty range DIE.
14993 FIXME: muller/2010-05-28: Possible references to object for low bound,
14994 high bound or count are not yet handled by this code. */
14995 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14997 struct objfile
*objfile
= cu
->objfile
;
14998 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14999 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15000 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15002 /* Test "int", "long int", and "long long int" objfile types,
15003 and select the first one having a size above or equal to the
15004 architecture address size. */
15005 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15006 base_type
= int_type
;
15009 int_type
= objfile_type (objfile
)->builtin_long
;
15010 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15011 base_type
= int_type
;
15014 int_type
= objfile_type (objfile
)->builtin_long_long
;
15015 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15016 base_type
= int_type
;
15021 /* Normally, the DWARF producers are expected to use a signed
15022 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15023 But this is unfortunately not always the case, as witnessed
15024 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15025 is used instead. To work around that ambiguity, we treat
15026 the bounds as signed, and thus sign-extend their values, when
15027 the base type is signed. */
15029 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
15030 if (low
.kind
== PROP_CONST
15031 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15032 low
.data
.const_val
|= negative_mask
;
15033 if (high
.kind
== PROP_CONST
15034 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15035 high
.data
.const_val
|= negative_mask
;
15037 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15039 if (high_bound_is_count
)
15040 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15042 /* Ada expects an empty array on no boundary attributes. */
15043 if (attr
== NULL
&& cu
->language
!= language_ada
)
15044 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15046 name
= dwarf2_name (die
, cu
);
15048 TYPE_NAME (range_type
) = name
;
15050 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15052 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15054 set_die_type (die
, range_type
, cu
);
15056 /* set_die_type should be already done. */
15057 set_descriptive_type (range_type
, die
, cu
);
15062 static struct type
*
15063 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15067 /* For now, we only support the C meaning of an unspecified type: void. */
15069 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
15070 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15072 return set_die_type (die
, type
, cu
);
15075 /* Read a single die and all its descendents. Set the die's sibling
15076 field to NULL; set other fields in the die correctly, and set all
15077 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15078 location of the info_ptr after reading all of those dies. PARENT
15079 is the parent of the die in question. */
15081 static struct die_info
*
15082 read_die_and_children (const struct die_reader_specs
*reader
,
15083 const gdb_byte
*info_ptr
,
15084 const gdb_byte
**new_info_ptr
,
15085 struct die_info
*parent
)
15087 struct die_info
*die
;
15088 const gdb_byte
*cur_ptr
;
15091 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15094 *new_info_ptr
= cur_ptr
;
15097 store_in_ref_table (die
, reader
->cu
);
15100 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15104 *new_info_ptr
= cur_ptr
;
15107 die
->sibling
= NULL
;
15108 die
->parent
= parent
;
15112 /* Read a die, all of its descendents, and all of its siblings; set
15113 all of the fields of all of the dies correctly. Arguments are as
15114 in read_die_and_children. */
15116 static struct die_info
*
15117 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15118 const gdb_byte
*info_ptr
,
15119 const gdb_byte
**new_info_ptr
,
15120 struct die_info
*parent
)
15122 struct die_info
*first_die
, *last_sibling
;
15123 const gdb_byte
*cur_ptr
;
15125 cur_ptr
= info_ptr
;
15126 first_die
= last_sibling
= NULL
;
15130 struct die_info
*die
15131 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15135 *new_info_ptr
= cur_ptr
;
15142 last_sibling
->sibling
= die
;
15144 last_sibling
= die
;
15148 /* Read a die, all of its descendents, and all of its siblings; set
15149 all of the fields of all of the dies correctly. Arguments are as
15150 in read_die_and_children.
15151 This the main entry point for reading a DIE and all its children. */
15153 static struct die_info
*
15154 read_die_and_siblings (const struct die_reader_specs
*reader
,
15155 const gdb_byte
*info_ptr
,
15156 const gdb_byte
**new_info_ptr
,
15157 struct die_info
*parent
)
15159 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15160 new_info_ptr
, parent
);
15162 if (dwarf_die_debug
)
15164 fprintf_unfiltered (gdb_stdlog
,
15165 "Read die from %s@0x%x of %s:\n",
15166 get_section_name (reader
->die_section
),
15167 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15168 bfd_get_filename (reader
->abfd
));
15169 dump_die (die
, dwarf_die_debug
);
15175 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15177 The caller is responsible for filling in the extra attributes
15178 and updating (*DIEP)->num_attrs.
15179 Set DIEP to point to a newly allocated die with its information,
15180 except for its child, sibling, and parent fields.
15181 Set HAS_CHILDREN to tell whether the die has children or not. */
15183 static const gdb_byte
*
15184 read_full_die_1 (const struct die_reader_specs
*reader
,
15185 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15186 int *has_children
, int num_extra_attrs
)
15188 unsigned int abbrev_number
, bytes_read
, i
;
15189 sect_offset offset
;
15190 struct abbrev_info
*abbrev
;
15191 struct die_info
*die
;
15192 struct dwarf2_cu
*cu
= reader
->cu
;
15193 bfd
*abfd
= reader
->abfd
;
15195 offset
.sect_off
= info_ptr
- reader
->buffer
;
15196 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15197 info_ptr
+= bytes_read
;
15198 if (!abbrev_number
)
15205 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15207 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15209 bfd_get_filename (abfd
));
15211 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15212 die
->offset
= offset
;
15213 die
->tag
= abbrev
->tag
;
15214 die
->abbrev
= abbrev_number
;
15216 /* Make the result usable.
15217 The caller needs to update num_attrs after adding the extra
15219 die
->num_attrs
= abbrev
->num_attrs
;
15221 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15222 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15226 *has_children
= abbrev
->has_children
;
15230 /* Read a die and all its attributes.
15231 Set DIEP to point to a newly allocated die with its information,
15232 except for its child, sibling, and parent fields.
15233 Set HAS_CHILDREN to tell whether the die has children or not. */
15235 static const gdb_byte
*
15236 read_full_die (const struct die_reader_specs
*reader
,
15237 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15240 const gdb_byte
*result
;
15242 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15244 if (dwarf_die_debug
)
15246 fprintf_unfiltered (gdb_stdlog
,
15247 "Read die from %s@0x%x of %s:\n",
15248 get_section_name (reader
->die_section
),
15249 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15250 bfd_get_filename (reader
->abfd
));
15251 dump_die (*diep
, dwarf_die_debug
);
15257 /* Abbreviation tables.
15259 In DWARF version 2, the description of the debugging information is
15260 stored in a separate .debug_abbrev section. Before we read any
15261 dies from a section we read in all abbreviations and install them
15262 in a hash table. */
15264 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15266 static struct abbrev_info
*
15267 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15269 struct abbrev_info
*abbrev
;
15271 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15272 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15277 /* Add an abbreviation to the table. */
15280 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15281 unsigned int abbrev_number
,
15282 struct abbrev_info
*abbrev
)
15284 unsigned int hash_number
;
15286 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15287 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15288 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15291 /* Look up an abbrev in the table.
15292 Returns NULL if the abbrev is not found. */
15294 static struct abbrev_info
*
15295 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15296 unsigned int abbrev_number
)
15298 unsigned int hash_number
;
15299 struct abbrev_info
*abbrev
;
15301 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15302 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15306 if (abbrev
->number
== abbrev_number
)
15308 abbrev
= abbrev
->next
;
15313 /* Read in an abbrev table. */
15315 static struct abbrev_table
*
15316 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15317 sect_offset offset
)
15319 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15320 bfd
*abfd
= get_section_bfd_owner (section
);
15321 struct abbrev_table
*abbrev_table
;
15322 const gdb_byte
*abbrev_ptr
;
15323 struct abbrev_info
*cur_abbrev
;
15324 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15325 unsigned int abbrev_form
;
15326 struct attr_abbrev
*cur_attrs
;
15327 unsigned int allocated_attrs
;
15329 abbrev_table
= XNEW (struct abbrev_table
);
15330 abbrev_table
->offset
= offset
;
15331 obstack_init (&abbrev_table
->abbrev_obstack
);
15332 abbrev_table
->abbrevs
=
15333 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15335 memset (abbrev_table
->abbrevs
, 0,
15336 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15338 dwarf2_read_section (objfile
, section
);
15339 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15340 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15341 abbrev_ptr
+= bytes_read
;
15343 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15344 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15346 /* Loop until we reach an abbrev number of 0. */
15347 while (abbrev_number
)
15349 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15351 /* read in abbrev header */
15352 cur_abbrev
->number
= abbrev_number
;
15354 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15355 abbrev_ptr
+= bytes_read
;
15356 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15359 /* now read in declarations */
15360 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15361 abbrev_ptr
+= bytes_read
;
15362 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15363 abbrev_ptr
+= bytes_read
;
15364 while (abbrev_name
)
15366 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15368 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15370 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15373 cur_attrs
[cur_abbrev
->num_attrs
].name
15374 = (enum dwarf_attribute
) abbrev_name
;
15375 cur_attrs
[cur_abbrev
->num_attrs
++].form
15376 = (enum dwarf_form
) abbrev_form
;
15377 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15378 abbrev_ptr
+= bytes_read
;
15379 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15380 abbrev_ptr
+= bytes_read
;
15383 cur_abbrev
->attrs
=
15384 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15385 cur_abbrev
->num_attrs
);
15386 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15387 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15389 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15391 /* Get next abbreviation.
15392 Under Irix6 the abbreviations for a compilation unit are not
15393 always properly terminated with an abbrev number of 0.
15394 Exit loop if we encounter an abbreviation which we have
15395 already read (which means we are about to read the abbreviations
15396 for the next compile unit) or if the end of the abbreviation
15397 table is reached. */
15398 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15400 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15401 abbrev_ptr
+= bytes_read
;
15402 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15407 return abbrev_table
;
15410 /* Free the resources held by ABBREV_TABLE. */
15413 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15415 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15416 xfree (abbrev_table
);
15419 /* Same as abbrev_table_free but as a cleanup.
15420 We pass in a pointer to the pointer to the table so that we can
15421 set the pointer to NULL when we're done. It also simplifies
15422 build_type_psymtabs_1. */
15425 abbrev_table_free_cleanup (void *table_ptr
)
15427 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15429 if (*abbrev_table_ptr
!= NULL
)
15430 abbrev_table_free (*abbrev_table_ptr
);
15431 *abbrev_table_ptr
= NULL
;
15434 /* Read the abbrev table for CU from ABBREV_SECTION. */
15437 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15438 struct dwarf2_section_info
*abbrev_section
)
15441 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15444 /* Release the memory used by the abbrev table for a compilation unit. */
15447 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15449 struct dwarf2_cu
*cu
= ptr_to_cu
;
15451 if (cu
->abbrev_table
!= NULL
)
15452 abbrev_table_free (cu
->abbrev_table
);
15453 /* Set this to NULL so that we SEGV if we try to read it later,
15454 and also because free_comp_unit verifies this is NULL. */
15455 cu
->abbrev_table
= NULL
;
15458 /* Returns nonzero if TAG represents a type that we might generate a partial
15462 is_type_tag_for_partial (int tag
)
15467 /* Some types that would be reasonable to generate partial symbols for,
15468 that we don't at present. */
15469 case DW_TAG_array_type
:
15470 case DW_TAG_file_type
:
15471 case DW_TAG_ptr_to_member_type
:
15472 case DW_TAG_set_type
:
15473 case DW_TAG_string_type
:
15474 case DW_TAG_subroutine_type
:
15476 case DW_TAG_base_type
:
15477 case DW_TAG_class_type
:
15478 case DW_TAG_interface_type
:
15479 case DW_TAG_enumeration_type
:
15480 case DW_TAG_structure_type
:
15481 case DW_TAG_subrange_type
:
15482 case DW_TAG_typedef
:
15483 case DW_TAG_union_type
:
15490 /* Load all DIEs that are interesting for partial symbols into memory. */
15492 static struct partial_die_info
*
15493 load_partial_dies (const struct die_reader_specs
*reader
,
15494 const gdb_byte
*info_ptr
, int building_psymtab
)
15496 struct dwarf2_cu
*cu
= reader
->cu
;
15497 struct objfile
*objfile
= cu
->objfile
;
15498 struct partial_die_info
*part_die
;
15499 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15500 struct abbrev_info
*abbrev
;
15501 unsigned int bytes_read
;
15502 unsigned int load_all
= 0;
15503 int nesting_level
= 1;
15508 gdb_assert (cu
->per_cu
!= NULL
);
15509 if (cu
->per_cu
->load_all_dies
)
15513 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15517 &cu
->comp_unit_obstack
,
15518 hashtab_obstack_allocate
,
15519 dummy_obstack_deallocate
);
15521 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15525 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15527 /* A NULL abbrev means the end of a series of children. */
15528 if (abbrev
== NULL
)
15530 if (--nesting_level
== 0)
15532 /* PART_DIE was probably the last thing allocated on the
15533 comp_unit_obstack, so we could call obstack_free
15534 here. We don't do that because the waste is small,
15535 and will be cleaned up when we're done with this
15536 compilation unit. This way, we're also more robust
15537 against other users of the comp_unit_obstack. */
15540 info_ptr
+= bytes_read
;
15541 last_die
= parent_die
;
15542 parent_die
= parent_die
->die_parent
;
15546 /* Check for template arguments. We never save these; if
15547 they're seen, we just mark the parent, and go on our way. */
15548 if (parent_die
!= NULL
15549 && cu
->language
== language_cplus
15550 && (abbrev
->tag
== DW_TAG_template_type_param
15551 || abbrev
->tag
== DW_TAG_template_value_param
))
15553 parent_die
->has_template_arguments
= 1;
15557 /* We don't need a partial DIE for the template argument. */
15558 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15563 /* We only recurse into c++ subprograms looking for template arguments.
15564 Skip their other children. */
15566 && cu
->language
== language_cplus
15567 && parent_die
!= NULL
15568 && parent_die
->tag
== DW_TAG_subprogram
)
15570 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15574 /* Check whether this DIE is interesting enough to save. Normally
15575 we would not be interested in members here, but there may be
15576 later variables referencing them via DW_AT_specification (for
15577 static members). */
15579 && !is_type_tag_for_partial (abbrev
->tag
)
15580 && abbrev
->tag
!= DW_TAG_constant
15581 && abbrev
->tag
!= DW_TAG_enumerator
15582 && abbrev
->tag
!= DW_TAG_subprogram
15583 && abbrev
->tag
!= DW_TAG_lexical_block
15584 && abbrev
->tag
!= DW_TAG_variable
15585 && abbrev
->tag
!= DW_TAG_namespace
15586 && abbrev
->tag
!= DW_TAG_module
15587 && abbrev
->tag
!= DW_TAG_member
15588 && abbrev
->tag
!= DW_TAG_imported_unit
15589 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15591 /* Otherwise we skip to the next sibling, if any. */
15592 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15596 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15599 /* This two-pass algorithm for processing partial symbols has a
15600 high cost in cache pressure. Thus, handle some simple cases
15601 here which cover the majority of C partial symbols. DIEs
15602 which neither have specification tags in them, nor could have
15603 specification tags elsewhere pointing at them, can simply be
15604 processed and discarded.
15606 This segment is also optional; scan_partial_symbols and
15607 add_partial_symbol will handle these DIEs if we chain
15608 them in normally. When compilers which do not emit large
15609 quantities of duplicate debug information are more common,
15610 this code can probably be removed. */
15612 /* Any complete simple types at the top level (pretty much all
15613 of them, for a language without namespaces), can be processed
15615 if (parent_die
== NULL
15616 && part_die
->has_specification
== 0
15617 && part_die
->is_declaration
== 0
15618 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15619 || part_die
->tag
== DW_TAG_base_type
15620 || part_die
->tag
== DW_TAG_subrange_type
))
15622 if (building_psymtab
&& part_die
->name
!= NULL
)
15623 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15624 VAR_DOMAIN
, LOC_TYPEDEF
,
15625 &objfile
->static_psymbols
,
15626 0, cu
->language
, objfile
);
15627 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15631 /* The exception for DW_TAG_typedef with has_children above is
15632 a workaround of GCC PR debug/47510. In the case of this complaint
15633 type_name_no_tag_or_error will error on such types later.
15635 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15636 it could not find the child DIEs referenced later, this is checked
15637 above. In correct DWARF DW_TAG_typedef should have no children. */
15639 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15640 complaint (&symfile_complaints
,
15641 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15642 "- DIE at 0x%x [in module %s]"),
15643 part_die
->offset
.sect_off
, objfile_name (objfile
));
15645 /* If we're at the second level, and we're an enumerator, and
15646 our parent has no specification (meaning possibly lives in a
15647 namespace elsewhere), then we can add the partial symbol now
15648 instead of queueing it. */
15649 if (part_die
->tag
== DW_TAG_enumerator
15650 && parent_die
!= NULL
15651 && parent_die
->die_parent
== NULL
15652 && parent_die
->tag
== DW_TAG_enumeration_type
15653 && parent_die
->has_specification
== 0)
15655 if (part_die
->name
== NULL
)
15656 complaint (&symfile_complaints
,
15657 _("malformed enumerator DIE ignored"));
15658 else if (building_psymtab
)
15659 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15660 VAR_DOMAIN
, LOC_CONST
,
15661 (cu
->language
== language_cplus
15662 || cu
->language
== language_java
)
15663 ? &objfile
->global_psymbols
15664 : &objfile
->static_psymbols
,
15665 0, cu
->language
, objfile
);
15667 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15671 /* We'll save this DIE so link it in. */
15672 part_die
->die_parent
= parent_die
;
15673 part_die
->die_sibling
= NULL
;
15674 part_die
->die_child
= NULL
;
15676 if (last_die
&& last_die
== parent_die
)
15677 last_die
->die_child
= part_die
;
15679 last_die
->die_sibling
= part_die
;
15681 last_die
= part_die
;
15683 if (first_die
== NULL
)
15684 first_die
= part_die
;
15686 /* Maybe add the DIE to the hash table. Not all DIEs that we
15687 find interesting need to be in the hash table, because we
15688 also have the parent/sibling/child chains; only those that we
15689 might refer to by offset later during partial symbol reading.
15691 For now this means things that might have be the target of a
15692 DW_AT_specification, DW_AT_abstract_origin, or
15693 DW_AT_extension. DW_AT_extension will refer only to
15694 namespaces; DW_AT_abstract_origin refers to functions (and
15695 many things under the function DIE, but we do not recurse
15696 into function DIEs during partial symbol reading) and
15697 possibly variables as well; DW_AT_specification refers to
15698 declarations. Declarations ought to have the DW_AT_declaration
15699 flag. It happens that GCC forgets to put it in sometimes, but
15700 only for functions, not for types.
15702 Adding more things than necessary to the hash table is harmless
15703 except for the performance cost. Adding too few will result in
15704 wasted time in find_partial_die, when we reread the compilation
15705 unit with load_all_dies set. */
15708 || abbrev
->tag
== DW_TAG_constant
15709 || abbrev
->tag
== DW_TAG_subprogram
15710 || abbrev
->tag
== DW_TAG_variable
15711 || abbrev
->tag
== DW_TAG_namespace
15712 || part_die
->is_declaration
)
15716 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15717 part_die
->offset
.sect_off
, INSERT
);
15721 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
15723 /* For some DIEs we want to follow their children (if any). For C
15724 we have no reason to follow the children of structures; for other
15725 languages we have to, so that we can get at method physnames
15726 to infer fully qualified class names, for DW_AT_specification,
15727 and for C++ template arguments. For C++, we also look one level
15728 inside functions to find template arguments (if the name of the
15729 function does not already contain the template arguments).
15731 For Ada, we need to scan the children of subprograms and lexical
15732 blocks as well because Ada allows the definition of nested
15733 entities that could be interesting for the debugger, such as
15734 nested subprograms for instance. */
15735 if (last_die
->has_children
15737 || last_die
->tag
== DW_TAG_namespace
15738 || last_die
->tag
== DW_TAG_module
15739 || last_die
->tag
== DW_TAG_enumeration_type
15740 || (cu
->language
== language_cplus
15741 && last_die
->tag
== DW_TAG_subprogram
15742 && (last_die
->name
== NULL
15743 || strchr (last_die
->name
, '<') == NULL
))
15744 || (cu
->language
!= language_c
15745 && (last_die
->tag
== DW_TAG_class_type
15746 || last_die
->tag
== DW_TAG_interface_type
15747 || last_die
->tag
== DW_TAG_structure_type
15748 || last_die
->tag
== DW_TAG_union_type
))
15749 || (cu
->language
== language_ada
15750 && (last_die
->tag
== DW_TAG_subprogram
15751 || last_die
->tag
== DW_TAG_lexical_block
))))
15754 parent_die
= last_die
;
15758 /* Otherwise we skip to the next sibling, if any. */
15759 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15761 /* Back to the top, do it again. */
15765 /* Read a minimal amount of information into the minimal die structure. */
15767 static const gdb_byte
*
15768 read_partial_die (const struct die_reader_specs
*reader
,
15769 struct partial_die_info
*part_die
,
15770 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15771 const gdb_byte
*info_ptr
)
15773 struct dwarf2_cu
*cu
= reader
->cu
;
15774 struct objfile
*objfile
= cu
->objfile
;
15775 const gdb_byte
*buffer
= reader
->buffer
;
15777 struct attribute attr
;
15778 int has_low_pc_attr
= 0;
15779 int has_high_pc_attr
= 0;
15780 int high_pc_relative
= 0;
15782 memset (part_die
, 0, sizeof (struct partial_die_info
));
15784 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15786 info_ptr
+= abbrev_len
;
15788 if (abbrev
== NULL
)
15791 part_die
->tag
= abbrev
->tag
;
15792 part_die
->has_children
= abbrev
->has_children
;
15794 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15796 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15798 /* Store the data if it is of an attribute we want to keep in a
15799 partial symbol table. */
15803 switch (part_die
->tag
)
15805 case DW_TAG_compile_unit
:
15806 case DW_TAG_partial_unit
:
15807 case DW_TAG_type_unit
:
15808 /* Compilation units have a DW_AT_name that is a filename, not
15809 a source language identifier. */
15810 case DW_TAG_enumeration_type
:
15811 case DW_TAG_enumerator
:
15812 /* These tags always have simple identifiers already; no need
15813 to canonicalize them. */
15814 part_die
->name
= DW_STRING (&attr
);
15818 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15819 &objfile
->per_bfd
->storage_obstack
);
15823 case DW_AT_linkage_name
:
15824 case DW_AT_MIPS_linkage_name
:
15825 /* Note that both forms of linkage name might appear. We
15826 assume they will be the same, and we only store the last
15828 if (cu
->language
== language_ada
)
15829 part_die
->name
= DW_STRING (&attr
);
15830 part_die
->linkage_name
= DW_STRING (&attr
);
15833 has_low_pc_attr
= 1;
15834 part_die
->lowpc
= attr_value_as_address (&attr
);
15836 case DW_AT_high_pc
:
15837 has_high_pc_attr
= 1;
15838 part_die
->highpc
= attr_value_as_address (&attr
);
15839 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15840 high_pc_relative
= 1;
15842 case DW_AT_location
:
15843 /* Support the .debug_loc offsets. */
15844 if (attr_form_is_block (&attr
))
15846 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15848 else if (attr_form_is_section_offset (&attr
))
15850 dwarf2_complex_location_expr_complaint ();
15854 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15855 "partial symbol information");
15858 case DW_AT_external
:
15859 part_die
->is_external
= DW_UNSND (&attr
);
15861 case DW_AT_declaration
:
15862 part_die
->is_declaration
= DW_UNSND (&attr
);
15865 part_die
->has_type
= 1;
15867 case DW_AT_abstract_origin
:
15868 case DW_AT_specification
:
15869 case DW_AT_extension
:
15870 part_die
->has_specification
= 1;
15871 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15872 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15873 || cu
->per_cu
->is_dwz
);
15875 case DW_AT_sibling
:
15876 /* Ignore absolute siblings, they might point outside of
15877 the current compile unit. */
15878 if (attr
.form
== DW_FORM_ref_addr
)
15879 complaint (&symfile_complaints
,
15880 _("ignoring absolute DW_AT_sibling"));
15883 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15884 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15886 if (sibling_ptr
< info_ptr
)
15887 complaint (&symfile_complaints
,
15888 _("DW_AT_sibling points backwards"));
15889 else if (sibling_ptr
> reader
->buffer_end
)
15890 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15892 part_die
->sibling
= sibling_ptr
;
15895 case DW_AT_byte_size
:
15896 part_die
->has_byte_size
= 1;
15898 case DW_AT_const_value
:
15899 part_die
->has_const_value
= 1;
15901 case DW_AT_calling_convention
:
15902 /* DWARF doesn't provide a way to identify a program's source-level
15903 entry point. DW_AT_calling_convention attributes are only meant
15904 to describe functions' calling conventions.
15906 However, because it's a necessary piece of information in
15907 Fortran, and because DW_CC_program is the only piece of debugging
15908 information whose definition refers to a 'main program' at all,
15909 several compilers have begun marking Fortran main programs with
15910 DW_CC_program --- even when those functions use the standard
15911 calling conventions.
15913 So until DWARF specifies a way to provide this information and
15914 compilers pick up the new representation, we'll support this
15916 if (DW_UNSND (&attr
) == DW_CC_program
15917 && cu
->language
== language_fortran
)
15918 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15921 if (DW_UNSND (&attr
) == DW_INL_inlined
15922 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15923 part_die
->may_be_inlined
= 1;
15927 if (part_die
->tag
== DW_TAG_imported_unit
)
15929 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15930 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15931 || cu
->per_cu
->is_dwz
);
15940 if (high_pc_relative
)
15941 part_die
->highpc
+= part_die
->lowpc
;
15943 if (has_low_pc_attr
&& has_high_pc_attr
)
15945 /* When using the GNU linker, .gnu.linkonce. sections are used to
15946 eliminate duplicate copies of functions and vtables and such.
15947 The linker will arbitrarily choose one and discard the others.
15948 The AT_*_pc values for such functions refer to local labels in
15949 these sections. If the section from that file was discarded, the
15950 labels are not in the output, so the relocs get a value of 0.
15951 If this is a discarded function, mark the pc bounds as invalid,
15952 so that GDB will ignore it. */
15953 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15955 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15957 complaint (&symfile_complaints
,
15958 _("DW_AT_low_pc %s is zero "
15959 "for DIE at 0x%x [in module %s]"),
15960 paddress (gdbarch
, part_die
->lowpc
),
15961 part_die
->offset
.sect_off
, objfile_name (objfile
));
15963 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15964 else if (part_die
->lowpc
>= part_die
->highpc
)
15966 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15968 complaint (&symfile_complaints
,
15969 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15970 "for DIE at 0x%x [in module %s]"),
15971 paddress (gdbarch
, part_die
->lowpc
),
15972 paddress (gdbarch
, part_die
->highpc
),
15973 part_die
->offset
.sect_off
, objfile_name (objfile
));
15976 part_die
->has_pc_info
= 1;
15982 /* Find a cached partial DIE at OFFSET in CU. */
15984 static struct partial_die_info
*
15985 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15987 struct partial_die_info
*lookup_die
= NULL
;
15988 struct partial_die_info part_die
;
15990 part_die
.offset
= offset
;
15991 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
15997 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15998 except in the case of .debug_types DIEs which do not reference
15999 outside their CU (they do however referencing other types via
16000 DW_FORM_ref_sig8). */
16002 static struct partial_die_info
*
16003 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16005 struct objfile
*objfile
= cu
->objfile
;
16006 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16007 struct partial_die_info
*pd
= NULL
;
16009 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16010 && offset_in_cu_p (&cu
->header
, offset
))
16012 pd
= find_partial_die_in_comp_unit (offset
, cu
);
16015 /* We missed recording what we needed.
16016 Load all dies and try again. */
16017 per_cu
= cu
->per_cu
;
16021 /* TUs don't reference other CUs/TUs (except via type signatures). */
16022 if (cu
->per_cu
->is_debug_types
)
16024 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
16025 " external reference to offset 0x%lx [in module %s].\n"),
16026 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
16027 bfd_get_filename (objfile
->obfd
));
16029 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16032 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16033 load_partial_comp_unit (per_cu
);
16035 per_cu
->cu
->last_used
= 0;
16036 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16039 /* If we didn't find it, and not all dies have been loaded,
16040 load them all and try again. */
16042 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16044 per_cu
->load_all_dies
= 1;
16046 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16047 THIS_CU->cu may already be in use. So we can't just free it and
16048 replace its DIEs with the ones we read in. Instead, we leave those
16049 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16050 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16052 load_partial_comp_unit (per_cu
);
16054 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
16058 internal_error (__FILE__
, __LINE__
,
16059 _("could not find partial DIE 0x%x "
16060 "in cache [from module %s]\n"),
16061 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
16065 /* See if we can figure out if the class lives in a namespace. We do
16066 this by looking for a member function; its demangled name will
16067 contain namespace info, if there is any. */
16070 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16071 struct dwarf2_cu
*cu
)
16073 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16074 what template types look like, because the demangler
16075 frequently doesn't give the same name as the debug info. We
16076 could fix this by only using the demangled name to get the
16077 prefix (but see comment in read_structure_type). */
16079 struct partial_die_info
*real_pdi
;
16080 struct partial_die_info
*child_pdi
;
16082 /* If this DIE (this DIE's specification, if any) has a parent, then
16083 we should not do this. We'll prepend the parent's fully qualified
16084 name when we create the partial symbol. */
16086 real_pdi
= struct_pdi
;
16087 while (real_pdi
->has_specification
)
16088 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16089 real_pdi
->spec_is_dwz
, cu
);
16091 if (real_pdi
->die_parent
!= NULL
)
16094 for (child_pdi
= struct_pdi
->die_child
;
16096 child_pdi
= child_pdi
->die_sibling
)
16098 if (child_pdi
->tag
== DW_TAG_subprogram
16099 && child_pdi
->linkage_name
!= NULL
)
16101 char *actual_class_name
16102 = language_class_name_from_physname (cu
->language_defn
,
16103 child_pdi
->linkage_name
);
16104 if (actual_class_name
!= NULL
)
16108 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16110 strlen (actual_class_name
)));
16111 xfree (actual_class_name
);
16118 /* Adjust PART_DIE before generating a symbol for it. This function
16119 may set the is_external flag or change the DIE's name. */
16122 fixup_partial_die (struct partial_die_info
*part_die
,
16123 struct dwarf2_cu
*cu
)
16125 /* Once we've fixed up a die, there's no point in doing so again.
16126 This also avoids a memory leak if we were to call
16127 guess_partial_die_structure_name multiple times. */
16128 if (part_die
->fixup_called
)
16131 /* If we found a reference attribute and the DIE has no name, try
16132 to find a name in the referred to DIE. */
16134 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16136 struct partial_die_info
*spec_die
;
16138 spec_die
= find_partial_die (part_die
->spec_offset
,
16139 part_die
->spec_is_dwz
, cu
);
16141 fixup_partial_die (spec_die
, cu
);
16143 if (spec_die
->name
)
16145 part_die
->name
= spec_die
->name
;
16147 /* Copy DW_AT_external attribute if it is set. */
16148 if (spec_die
->is_external
)
16149 part_die
->is_external
= spec_die
->is_external
;
16153 /* Set default names for some unnamed DIEs. */
16155 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16156 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16158 /* If there is no parent die to provide a namespace, and there are
16159 children, see if we can determine the namespace from their linkage
16161 if (cu
->language
== language_cplus
16162 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16163 && part_die
->die_parent
== NULL
16164 && part_die
->has_children
16165 && (part_die
->tag
== DW_TAG_class_type
16166 || part_die
->tag
== DW_TAG_structure_type
16167 || part_die
->tag
== DW_TAG_union_type
))
16168 guess_partial_die_structure_name (part_die
, cu
);
16170 /* GCC might emit a nameless struct or union that has a linkage
16171 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16172 if (part_die
->name
== NULL
16173 && (part_die
->tag
== DW_TAG_class_type
16174 || part_die
->tag
== DW_TAG_interface_type
16175 || part_die
->tag
== DW_TAG_structure_type
16176 || part_die
->tag
== DW_TAG_union_type
)
16177 && part_die
->linkage_name
!= NULL
)
16181 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16186 /* Strip any leading namespaces/classes, keep only the base name.
16187 DW_AT_name for named DIEs does not contain the prefixes. */
16188 base
= strrchr (demangled
, ':');
16189 if (base
&& base
> demangled
&& base
[-1] == ':')
16196 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16197 base
, strlen (base
)));
16202 part_die
->fixup_called
= 1;
16205 /* Read an attribute value described by an attribute form. */
16207 static const gdb_byte
*
16208 read_attribute_value (const struct die_reader_specs
*reader
,
16209 struct attribute
*attr
, unsigned form
,
16210 const gdb_byte
*info_ptr
)
16212 struct dwarf2_cu
*cu
= reader
->cu
;
16213 struct objfile
*objfile
= cu
->objfile
;
16214 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16215 bfd
*abfd
= reader
->abfd
;
16216 struct comp_unit_head
*cu_header
= &cu
->header
;
16217 unsigned int bytes_read
;
16218 struct dwarf_block
*blk
;
16220 attr
->form
= (enum dwarf_form
) form
;
16223 case DW_FORM_ref_addr
:
16224 if (cu
->header
.version
== 2)
16225 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16227 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16228 &cu
->header
, &bytes_read
);
16229 info_ptr
+= bytes_read
;
16231 case DW_FORM_GNU_ref_alt
:
16232 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16233 info_ptr
+= bytes_read
;
16236 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16237 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16238 info_ptr
+= bytes_read
;
16240 case DW_FORM_block2
:
16241 blk
= dwarf_alloc_block (cu
);
16242 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16244 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16245 info_ptr
+= blk
->size
;
16246 DW_BLOCK (attr
) = blk
;
16248 case DW_FORM_block4
:
16249 blk
= dwarf_alloc_block (cu
);
16250 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16252 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16253 info_ptr
+= blk
->size
;
16254 DW_BLOCK (attr
) = blk
;
16256 case DW_FORM_data2
:
16257 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16260 case DW_FORM_data4
:
16261 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16264 case DW_FORM_data8
:
16265 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16268 case DW_FORM_sec_offset
:
16269 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16270 info_ptr
+= bytes_read
;
16272 case DW_FORM_string
:
16273 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16274 DW_STRING_IS_CANONICAL (attr
) = 0;
16275 info_ptr
+= bytes_read
;
16278 if (!cu
->per_cu
->is_dwz
)
16280 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16282 DW_STRING_IS_CANONICAL (attr
) = 0;
16283 info_ptr
+= bytes_read
;
16287 case DW_FORM_GNU_strp_alt
:
16289 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16290 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16293 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16294 DW_STRING_IS_CANONICAL (attr
) = 0;
16295 info_ptr
+= bytes_read
;
16298 case DW_FORM_exprloc
:
16299 case DW_FORM_block
:
16300 blk
= dwarf_alloc_block (cu
);
16301 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16302 info_ptr
+= bytes_read
;
16303 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16304 info_ptr
+= blk
->size
;
16305 DW_BLOCK (attr
) = blk
;
16307 case DW_FORM_block1
:
16308 blk
= dwarf_alloc_block (cu
);
16309 blk
->size
= read_1_byte (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_data1
:
16316 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16320 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16323 case DW_FORM_flag_present
:
16324 DW_UNSND (attr
) = 1;
16326 case DW_FORM_sdata
:
16327 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16328 info_ptr
+= bytes_read
;
16330 case DW_FORM_udata
:
16331 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16332 info_ptr
+= bytes_read
;
16335 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16336 + read_1_byte (abfd
, info_ptr
));
16340 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16341 + read_2_bytes (abfd
, info_ptr
));
16345 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16346 + read_4_bytes (abfd
, info_ptr
));
16350 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16351 + read_8_bytes (abfd
, info_ptr
));
16354 case DW_FORM_ref_sig8
:
16355 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16358 case DW_FORM_ref_udata
:
16359 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16360 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16361 info_ptr
+= bytes_read
;
16363 case DW_FORM_indirect
:
16364 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16365 info_ptr
+= bytes_read
;
16366 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16368 case DW_FORM_GNU_addr_index
:
16369 if (reader
->dwo_file
== NULL
)
16371 /* For now flag a hard error.
16372 Later we can turn this into a complaint. */
16373 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16374 dwarf_form_name (form
),
16375 bfd_get_filename (abfd
));
16377 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16378 info_ptr
+= bytes_read
;
16380 case DW_FORM_GNU_str_index
:
16381 if (reader
->dwo_file
== NULL
)
16383 /* For now flag a hard error.
16384 Later we can turn this into a complaint if warranted. */
16385 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16386 dwarf_form_name (form
),
16387 bfd_get_filename (abfd
));
16390 ULONGEST str_index
=
16391 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16393 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16394 DW_STRING_IS_CANONICAL (attr
) = 0;
16395 info_ptr
+= bytes_read
;
16399 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16400 dwarf_form_name (form
),
16401 bfd_get_filename (abfd
));
16405 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16406 attr
->form
= DW_FORM_GNU_ref_alt
;
16408 /* We have seen instances where the compiler tried to emit a byte
16409 size attribute of -1 which ended up being encoded as an unsigned
16410 0xffffffff. Although 0xffffffff is technically a valid size value,
16411 an object of this size seems pretty unlikely so we can relatively
16412 safely treat these cases as if the size attribute was invalid and
16413 treat them as zero by default. */
16414 if (attr
->name
== DW_AT_byte_size
16415 && form
== DW_FORM_data4
16416 && DW_UNSND (attr
) >= 0xffffffff)
16419 (&symfile_complaints
,
16420 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16421 hex_string (DW_UNSND (attr
)));
16422 DW_UNSND (attr
) = 0;
16428 /* Read an attribute described by an abbreviated attribute. */
16430 static const gdb_byte
*
16431 read_attribute (const struct die_reader_specs
*reader
,
16432 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16433 const gdb_byte
*info_ptr
)
16435 attr
->name
= abbrev
->name
;
16436 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16439 /* Read dwarf information from a buffer. */
16441 static unsigned int
16442 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16444 return bfd_get_8 (abfd
, buf
);
16448 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16450 return bfd_get_signed_8 (abfd
, buf
);
16453 static unsigned int
16454 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16456 return bfd_get_16 (abfd
, buf
);
16460 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16462 return bfd_get_signed_16 (abfd
, buf
);
16465 static unsigned int
16466 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16468 return bfd_get_32 (abfd
, buf
);
16472 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16474 return bfd_get_signed_32 (abfd
, buf
);
16478 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16480 return bfd_get_64 (abfd
, buf
);
16484 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16485 unsigned int *bytes_read
)
16487 struct comp_unit_head
*cu_header
= &cu
->header
;
16488 CORE_ADDR retval
= 0;
16490 if (cu_header
->signed_addr_p
)
16492 switch (cu_header
->addr_size
)
16495 retval
= bfd_get_signed_16 (abfd
, buf
);
16498 retval
= bfd_get_signed_32 (abfd
, buf
);
16501 retval
= bfd_get_signed_64 (abfd
, buf
);
16504 internal_error (__FILE__
, __LINE__
,
16505 _("read_address: bad switch, signed [in module %s]"),
16506 bfd_get_filename (abfd
));
16511 switch (cu_header
->addr_size
)
16514 retval
= bfd_get_16 (abfd
, buf
);
16517 retval
= bfd_get_32 (abfd
, buf
);
16520 retval
= bfd_get_64 (abfd
, buf
);
16523 internal_error (__FILE__
, __LINE__
,
16524 _("read_address: bad switch, "
16525 "unsigned [in module %s]"),
16526 bfd_get_filename (abfd
));
16530 *bytes_read
= cu_header
->addr_size
;
16534 /* Read the initial length from a section. The (draft) DWARF 3
16535 specification allows the initial length to take up either 4 bytes
16536 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16537 bytes describe the length and all offsets will be 8 bytes in length
16540 An older, non-standard 64-bit format is also handled by this
16541 function. The older format in question stores the initial length
16542 as an 8-byte quantity without an escape value. Lengths greater
16543 than 2^32 aren't very common which means that the initial 4 bytes
16544 is almost always zero. Since a length value of zero doesn't make
16545 sense for the 32-bit format, this initial zero can be considered to
16546 be an escape value which indicates the presence of the older 64-bit
16547 format. As written, the code can't detect (old format) lengths
16548 greater than 4GB. If it becomes necessary to handle lengths
16549 somewhat larger than 4GB, we could allow other small values (such
16550 as the non-sensical values of 1, 2, and 3) to also be used as
16551 escape values indicating the presence of the old format.
16553 The value returned via bytes_read should be used to increment the
16554 relevant pointer after calling read_initial_length().
16556 [ Note: read_initial_length() and read_offset() are based on the
16557 document entitled "DWARF Debugging Information Format", revision
16558 3, draft 8, dated November 19, 2001. This document was obtained
16561 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16563 This document is only a draft and is subject to change. (So beware.)
16565 Details regarding the older, non-standard 64-bit format were
16566 determined empirically by examining 64-bit ELF files produced by
16567 the SGI toolchain on an IRIX 6.5 machine.
16569 - Kevin, July 16, 2002
16573 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16575 LONGEST length
= bfd_get_32 (abfd
, buf
);
16577 if (length
== 0xffffffff)
16579 length
= bfd_get_64 (abfd
, buf
+ 4);
16582 else if (length
== 0)
16584 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16585 length
= bfd_get_64 (abfd
, buf
);
16596 /* Cover function for read_initial_length.
16597 Returns the length of the object at BUF, and stores the size of the
16598 initial length in *BYTES_READ and stores the size that offsets will be in
16600 If the initial length size is not equivalent to that specified in
16601 CU_HEADER then issue a complaint.
16602 This is useful when reading non-comp-unit headers. */
16605 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16606 const struct comp_unit_head
*cu_header
,
16607 unsigned int *bytes_read
,
16608 unsigned int *offset_size
)
16610 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16612 gdb_assert (cu_header
->initial_length_size
== 4
16613 || cu_header
->initial_length_size
== 8
16614 || cu_header
->initial_length_size
== 12);
16616 if (cu_header
->initial_length_size
!= *bytes_read
)
16617 complaint (&symfile_complaints
,
16618 _("intermixed 32-bit and 64-bit DWARF sections"));
16620 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16624 /* Read an offset from the data stream. The size of the offset is
16625 given by cu_header->offset_size. */
16628 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16629 const struct comp_unit_head
*cu_header
,
16630 unsigned int *bytes_read
)
16632 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16634 *bytes_read
= cu_header
->offset_size
;
16638 /* Read an offset from the data stream. */
16641 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16643 LONGEST retval
= 0;
16645 switch (offset_size
)
16648 retval
= bfd_get_32 (abfd
, buf
);
16651 retval
= bfd_get_64 (abfd
, buf
);
16654 internal_error (__FILE__
, __LINE__
,
16655 _("read_offset_1: bad switch [in module %s]"),
16656 bfd_get_filename (abfd
));
16662 static const gdb_byte
*
16663 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16665 /* If the size of a host char is 8 bits, we can return a pointer
16666 to the buffer, otherwise we have to copy the data to a buffer
16667 allocated on the temporary obstack. */
16668 gdb_assert (HOST_CHAR_BIT
== 8);
16672 static const char *
16673 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16674 unsigned int *bytes_read_ptr
)
16676 /* If the size of a host char is 8 bits, we can return a pointer
16677 to the string, otherwise we have to copy the string to a buffer
16678 allocated on the temporary obstack. */
16679 gdb_assert (HOST_CHAR_BIT
== 8);
16682 *bytes_read_ptr
= 1;
16685 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16686 return (const char *) buf
;
16689 static const char *
16690 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16692 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16693 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16694 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16695 bfd_get_filename (abfd
));
16696 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16697 error (_("DW_FORM_strp pointing outside of "
16698 ".debug_str section [in module %s]"),
16699 bfd_get_filename (abfd
));
16700 gdb_assert (HOST_CHAR_BIT
== 8);
16701 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16703 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16706 /* Read a string at offset STR_OFFSET in the .debug_str section from
16707 the .dwz file DWZ. Throw an error if the offset is too large. If
16708 the string consists of a single NUL byte, return NULL; otherwise
16709 return a pointer to the string. */
16711 static const char *
16712 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16714 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16716 if (dwz
->str
.buffer
== NULL
)
16717 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16718 "section [in module %s]"),
16719 bfd_get_filename (dwz
->dwz_bfd
));
16720 if (str_offset
>= dwz
->str
.size
)
16721 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16722 ".debug_str section [in module %s]"),
16723 bfd_get_filename (dwz
->dwz_bfd
));
16724 gdb_assert (HOST_CHAR_BIT
== 8);
16725 if (dwz
->str
.buffer
[str_offset
] == '\0')
16727 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16730 static const char *
16731 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16732 const struct comp_unit_head
*cu_header
,
16733 unsigned int *bytes_read_ptr
)
16735 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16737 return read_indirect_string_at_offset (abfd
, str_offset
);
16741 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16742 unsigned int *bytes_read_ptr
)
16745 unsigned int num_read
;
16747 unsigned char byte
;
16755 byte
= bfd_get_8 (abfd
, buf
);
16758 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16759 if ((byte
& 128) == 0)
16765 *bytes_read_ptr
= num_read
;
16770 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16771 unsigned int *bytes_read_ptr
)
16774 int i
, shift
, num_read
;
16775 unsigned char byte
;
16783 byte
= bfd_get_8 (abfd
, buf
);
16786 result
|= ((LONGEST
) (byte
& 127) << shift
);
16788 if ((byte
& 128) == 0)
16793 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16794 result
|= -(((LONGEST
) 1) << shift
);
16795 *bytes_read_ptr
= num_read
;
16799 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16800 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16801 ADDR_SIZE is the size of addresses from the CU header. */
16804 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16806 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16807 bfd
*abfd
= objfile
->obfd
;
16808 const gdb_byte
*info_ptr
;
16810 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16811 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16812 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16813 objfile_name (objfile
));
16814 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16815 error (_("DW_FORM_addr_index pointing outside of "
16816 ".debug_addr section [in module %s]"),
16817 objfile_name (objfile
));
16818 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16819 + addr_base
+ addr_index
* addr_size
);
16820 if (addr_size
== 4)
16821 return bfd_get_32 (abfd
, info_ptr
);
16823 return bfd_get_64 (abfd
, info_ptr
);
16826 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16829 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16831 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16834 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16837 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16838 unsigned int *bytes_read
)
16840 bfd
*abfd
= cu
->objfile
->obfd
;
16841 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16843 return read_addr_index (cu
, addr_index
);
16846 /* Data structure to pass results from dwarf2_read_addr_index_reader
16847 back to dwarf2_read_addr_index. */
16849 struct dwarf2_read_addr_index_data
16851 ULONGEST addr_base
;
16855 /* die_reader_func for dwarf2_read_addr_index. */
16858 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16859 const gdb_byte
*info_ptr
,
16860 struct die_info
*comp_unit_die
,
16864 struct dwarf2_cu
*cu
= reader
->cu
;
16865 struct dwarf2_read_addr_index_data
*aidata
=
16866 (struct dwarf2_read_addr_index_data
*) data
;
16868 aidata
->addr_base
= cu
->addr_base
;
16869 aidata
->addr_size
= cu
->header
.addr_size
;
16872 /* Given an index in .debug_addr, fetch the value.
16873 NOTE: This can be called during dwarf expression evaluation,
16874 long after the debug information has been read, and thus per_cu->cu
16875 may no longer exist. */
16878 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16879 unsigned int addr_index
)
16881 struct objfile
*objfile
= per_cu
->objfile
;
16882 struct dwarf2_cu
*cu
= per_cu
->cu
;
16883 ULONGEST addr_base
;
16886 /* This is intended to be called from outside this file. */
16887 dw2_setup (objfile
);
16889 /* We need addr_base and addr_size.
16890 If we don't have PER_CU->cu, we have to get it.
16891 Nasty, but the alternative is storing the needed info in PER_CU,
16892 which at this point doesn't seem justified: it's not clear how frequently
16893 it would get used and it would increase the size of every PER_CU.
16894 Entry points like dwarf2_per_cu_addr_size do a similar thing
16895 so we're not in uncharted territory here.
16896 Alas we need to be a bit more complicated as addr_base is contained
16899 We don't need to read the entire CU(/TU).
16900 We just need the header and top level die.
16902 IWBN to use the aging mechanism to let us lazily later discard the CU.
16903 For now we skip this optimization. */
16907 addr_base
= cu
->addr_base
;
16908 addr_size
= cu
->header
.addr_size
;
16912 struct dwarf2_read_addr_index_data aidata
;
16914 /* Note: We can't use init_cutu_and_read_dies_simple here,
16915 we need addr_base. */
16916 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16917 dwarf2_read_addr_index_reader
, &aidata
);
16918 addr_base
= aidata
.addr_base
;
16919 addr_size
= aidata
.addr_size
;
16922 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16925 /* Given a DW_FORM_GNU_str_index, fetch the string.
16926 This is only used by the Fission support. */
16928 static const char *
16929 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16931 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16932 const char *objf_name
= objfile_name (objfile
);
16933 bfd
*abfd
= objfile
->obfd
;
16934 struct dwarf2_cu
*cu
= reader
->cu
;
16935 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16936 struct dwarf2_section_info
*str_offsets_section
=
16937 &reader
->dwo_file
->sections
.str_offsets
;
16938 const gdb_byte
*info_ptr
;
16939 ULONGEST str_offset
;
16940 static const char form_name
[] = "DW_FORM_GNU_str_index";
16942 dwarf2_read_section (objfile
, str_section
);
16943 dwarf2_read_section (objfile
, str_offsets_section
);
16944 if (str_section
->buffer
== NULL
)
16945 error (_("%s used without .debug_str.dwo section"
16946 " in CU at offset 0x%lx [in module %s]"),
16947 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16948 if (str_offsets_section
->buffer
== NULL
)
16949 error (_("%s used without .debug_str_offsets.dwo section"
16950 " in CU at offset 0x%lx [in module %s]"),
16951 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16952 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16953 error (_("%s pointing outside of .debug_str_offsets.dwo"
16954 " section in CU at offset 0x%lx [in module %s]"),
16955 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16956 info_ptr
= (str_offsets_section
->buffer
16957 + str_index
* cu
->header
.offset_size
);
16958 if (cu
->header
.offset_size
== 4)
16959 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16961 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16962 if (str_offset
>= str_section
->size
)
16963 error (_("Offset from %s pointing outside of"
16964 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16965 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16966 return (const char *) (str_section
->buffer
+ str_offset
);
16969 /* Return the length of an LEB128 number in BUF. */
16972 leb128_size (const gdb_byte
*buf
)
16974 const gdb_byte
*begin
= buf
;
16980 if ((byte
& 128) == 0)
16981 return buf
- begin
;
16986 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16995 cu
->language
= language_c
;
16997 case DW_LANG_C_plus_plus
:
16998 case DW_LANG_C_plus_plus_11
:
16999 case DW_LANG_C_plus_plus_14
:
17000 cu
->language
= language_cplus
;
17003 cu
->language
= language_d
;
17005 case DW_LANG_Fortran77
:
17006 case DW_LANG_Fortran90
:
17007 case DW_LANG_Fortran95
:
17008 case DW_LANG_Fortran03
:
17009 case DW_LANG_Fortran08
:
17010 cu
->language
= language_fortran
;
17013 cu
->language
= language_go
;
17015 case DW_LANG_Mips_Assembler
:
17016 cu
->language
= language_asm
;
17019 cu
->language
= language_java
;
17021 case DW_LANG_Ada83
:
17022 case DW_LANG_Ada95
:
17023 cu
->language
= language_ada
;
17025 case DW_LANG_Modula2
:
17026 cu
->language
= language_m2
;
17028 case DW_LANG_Pascal83
:
17029 cu
->language
= language_pascal
;
17032 cu
->language
= language_objc
;
17034 case DW_LANG_Cobol74
:
17035 case DW_LANG_Cobol85
:
17037 cu
->language
= language_minimal
;
17040 cu
->language_defn
= language_def (cu
->language
);
17043 /* Return the named attribute or NULL if not there. */
17045 static struct attribute
*
17046 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17051 struct attribute
*spec
= NULL
;
17053 for (i
= 0; i
< die
->num_attrs
; ++i
)
17055 if (die
->attrs
[i
].name
== name
)
17056 return &die
->attrs
[i
];
17057 if (die
->attrs
[i
].name
== DW_AT_specification
17058 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17059 spec
= &die
->attrs
[i
];
17065 die
= follow_die_ref (die
, spec
, &cu
);
17071 /* Return the named attribute or NULL if not there,
17072 but do not follow DW_AT_specification, etc.
17073 This is for use in contexts where we're reading .debug_types dies.
17074 Following DW_AT_specification, DW_AT_abstract_origin will take us
17075 back up the chain, and we want to go down. */
17077 static struct attribute
*
17078 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17082 for (i
= 0; i
< die
->num_attrs
; ++i
)
17083 if (die
->attrs
[i
].name
== name
)
17084 return &die
->attrs
[i
];
17089 /* Return the string associated with a string-typed attribute, or NULL if it
17090 is either not found or is of an incorrect type. */
17092 static const char *
17093 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17095 struct attribute
*attr
;
17096 const char *str
= NULL
;
17098 attr
= dwarf2_attr (die
, name
, cu
);
17102 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_string
17103 || attr
->form
== DW_FORM_GNU_strp_alt
)
17104 str
= DW_STRING (attr
);
17106 complaint (&symfile_complaints
,
17107 _("string type expected for attribute %s for "
17108 "DIE at 0x%x in module %s"),
17109 dwarf_attr_name (name
), die
->offset
.sect_off
,
17110 objfile_name (cu
->objfile
));
17116 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17117 and holds a non-zero value. This function should only be used for
17118 DW_FORM_flag or DW_FORM_flag_present attributes. */
17121 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17123 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17125 return (attr
&& DW_UNSND (attr
));
17129 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17131 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17132 which value is non-zero. However, we have to be careful with
17133 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17134 (via dwarf2_flag_true_p) follows this attribute. So we may
17135 end up accidently finding a declaration attribute that belongs
17136 to a different DIE referenced by the specification attribute,
17137 even though the given DIE does not have a declaration attribute. */
17138 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17139 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17142 /* Return the die giving the specification for DIE, if there is
17143 one. *SPEC_CU is the CU containing DIE on input, and the CU
17144 containing the return value on output. If there is no
17145 specification, but there is an abstract origin, that is
17148 static struct die_info
*
17149 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17151 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17154 if (spec_attr
== NULL
)
17155 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17157 if (spec_attr
== NULL
)
17160 return follow_die_ref (die
, spec_attr
, spec_cu
);
17163 /* Free the line_header structure *LH, and any arrays and strings it
17165 NOTE: This is also used as a "cleanup" function. */
17168 free_line_header (struct line_header
*lh
)
17170 if (lh
->standard_opcode_lengths
)
17171 xfree (lh
->standard_opcode_lengths
);
17173 /* Remember that all the lh->file_names[i].name pointers are
17174 pointers into debug_line_buffer, and don't need to be freed. */
17175 if (lh
->file_names
)
17176 xfree (lh
->file_names
);
17178 /* Similarly for the include directory names. */
17179 if (lh
->include_dirs
)
17180 xfree (lh
->include_dirs
);
17185 /* Stub for free_line_header to match void * callback types. */
17188 free_line_header_voidp (void *arg
)
17190 struct line_header
*lh
= arg
;
17192 free_line_header (lh
);
17195 /* Add an entry to LH's include directory table. */
17198 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17200 if (dwarf_line_debug
>= 2)
17201 fprintf_unfiltered (gdb_stdlog
, "Adding dir %u: %s\n",
17202 lh
->num_include_dirs
+ 1, include_dir
);
17204 /* Grow the array if necessary. */
17205 if (lh
->include_dirs_size
== 0)
17207 lh
->include_dirs_size
= 1; /* for testing */
17208 lh
->include_dirs
= XNEWVEC (const char *, lh
->include_dirs_size
);
17210 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17212 lh
->include_dirs_size
*= 2;
17213 lh
->include_dirs
= XRESIZEVEC (const char *, lh
->include_dirs
,
17214 lh
->include_dirs_size
);
17217 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17220 /* Add an entry to LH's file name table. */
17223 add_file_name (struct line_header
*lh
,
17225 unsigned int dir_index
,
17226 unsigned int mod_time
,
17227 unsigned int length
)
17229 struct file_entry
*fe
;
17231 if (dwarf_line_debug
>= 2)
17232 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17233 lh
->num_file_names
+ 1, name
);
17235 /* Grow the array if necessary. */
17236 if (lh
->file_names_size
== 0)
17238 lh
->file_names_size
= 1; /* for testing */
17239 lh
->file_names
= XNEWVEC (struct file_entry
, lh
->file_names_size
);
17241 else if (lh
->num_file_names
>= lh
->file_names_size
)
17243 lh
->file_names_size
*= 2;
17245 = XRESIZEVEC (struct file_entry
, lh
->file_names
, lh
->file_names_size
);
17248 fe
= &lh
->file_names
[lh
->num_file_names
++];
17250 fe
->dir_index
= dir_index
;
17251 fe
->mod_time
= mod_time
;
17252 fe
->length
= length
;
17253 fe
->included_p
= 0;
17257 /* A convenience function to find the proper .debug_line section for a CU. */
17259 static struct dwarf2_section_info
*
17260 get_debug_line_section (struct dwarf2_cu
*cu
)
17262 struct dwarf2_section_info
*section
;
17264 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17266 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17267 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17268 else if (cu
->per_cu
->is_dwz
)
17270 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17272 section
= &dwz
->line
;
17275 section
= &dwarf2_per_objfile
->line
;
17280 /* Read the statement program header starting at OFFSET in
17281 .debug_line, or .debug_line.dwo. Return a pointer
17282 to a struct line_header, allocated using xmalloc.
17283 Returns NULL if there is a problem reading the header, e.g., if it
17284 has a version we don't understand.
17286 NOTE: the strings in the include directory and file name tables of
17287 the returned object point into the dwarf line section buffer,
17288 and must not be freed. */
17290 static struct line_header
*
17291 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17293 struct cleanup
*back_to
;
17294 struct line_header
*lh
;
17295 const gdb_byte
*line_ptr
;
17296 unsigned int bytes_read
, offset_size
;
17298 const char *cur_dir
, *cur_file
;
17299 struct dwarf2_section_info
*section
;
17302 section
= get_debug_line_section (cu
);
17303 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17304 if (section
->buffer
== NULL
)
17306 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17307 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17309 complaint (&symfile_complaints
, _("missing .debug_line section"));
17313 /* We can't do this until we know the section is non-empty.
17314 Only then do we know we have such a section. */
17315 abfd
= get_section_bfd_owner (section
);
17317 /* Make sure that at least there's room for the total_length field.
17318 That could be 12 bytes long, but we're just going to fudge that. */
17319 if (offset
+ 4 >= section
->size
)
17321 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17325 lh
= XNEW (struct line_header
);
17326 memset (lh
, 0, sizeof (*lh
));
17327 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17330 lh
->offset
.sect_off
= offset
;
17331 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17333 line_ptr
= section
->buffer
+ offset
;
17335 /* Read in the header. */
17337 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17338 &bytes_read
, &offset_size
);
17339 line_ptr
+= bytes_read
;
17340 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17342 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17343 do_cleanups (back_to
);
17346 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17347 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17349 if (lh
->version
> 4)
17351 /* This is a version we don't understand. The format could have
17352 changed in ways we don't handle properly so just punt. */
17353 complaint (&symfile_complaints
,
17354 _("unsupported version in .debug_line section"));
17357 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17358 line_ptr
+= offset_size
;
17359 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17361 if (lh
->version
>= 4)
17363 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17367 lh
->maximum_ops_per_instruction
= 1;
17369 if (lh
->maximum_ops_per_instruction
== 0)
17371 lh
->maximum_ops_per_instruction
= 1;
17372 complaint (&symfile_complaints
,
17373 _("invalid maximum_ops_per_instruction "
17374 "in `.debug_line' section"));
17377 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17379 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17381 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17383 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17385 lh
->standard_opcode_lengths
= XNEWVEC (unsigned char, lh
->opcode_base
);
17387 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17388 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17390 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17394 /* Read directory table. */
17395 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17397 line_ptr
+= bytes_read
;
17398 add_include_dir (lh
, cur_dir
);
17400 line_ptr
+= bytes_read
;
17402 /* Read file name table. */
17403 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17405 unsigned int dir_index
, mod_time
, length
;
17407 line_ptr
+= bytes_read
;
17408 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17409 line_ptr
+= bytes_read
;
17410 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17411 line_ptr
+= bytes_read
;
17412 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17413 line_ptr
+= bytes_read
;
17415 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17417 line_ptr
+= bytes_read
;
17418 lh
->statement_program_start
= line_ptr
;
17420 if (line_ptr
> (section
->buffer
+ section
->size
))
17421 complaint (&symfile_complaints
,
17422 _("line number info header doesn't "
17423 "fit in `.debug_line' section"));
17425 discard_cleanups (back_to
);
17429 /* Subroutine of dwarf_decode_lines to simplify it.
17430 Return the file name of the psymtab for included file FILE_INDEX
17431 in line header LH of PST.
17432 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17433 If space for the result is malloc'd, it will be freed by a cleanup.
17434 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17436 The function creates dangling cleanup registration. */
17438 static const char *
17439 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17440 const struct partial_symtab
*pst
,
17441 const char *comp_dir
)
17443 const struct file_entry fe
= lh
->file_names
[file_index
];
17444 const char *include_name
= fe
.name
;
17445 const char *include_name_to_compare
= include_name
;
17446 const char *dir_name
= NULL
;
17447 const char *pst_filename
;
17448 char *copied_name
= NULL
;
17451 if (fe
.dir_index
&& lh
->include_dirs
!= NULL
)
17452 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17454 if (!IS_ABSOLUTE_PATH (include_name
)
17455 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17457 /* Avoid creating a duplicate psymtab for PST.
17458 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17459 Before we do the comparison, however, we need to account
17460 for DIR_NAME and COMP_DIR.
17461 First prepend dir_name (if non-NULL). If we still don't
17462 have an absolute path prepend comp_dir (if non-NULL).
17463 However, the directory we record in the include-file's
17464 psymtab does not contain COMP_DIR (to match the
17465 corresponding symtab(s)).
17470 bash$ gcc -g ./hello.c
17471 include_name = "hello.c"
17473 DW_AT_comp_dir = comp_dir = "/tmp"
17474 DW_AT_name = "./hello.c"
17478 if (dir_name
!= NULL
)
17480 char *tem
= concat (dir_name
, SLASH_STRING
,
17481 include_name
, (char *)NULL
);
17483 make_cleanup (xfree
, tem
);
17484 include_name
= tem
;
17485 include_name_to_compare
= include_name
;
17487 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17489 char *tem
= concat (comp_dir
, SLASH_STRING
,
17490 include_name
, (char *)NULL
);
17492 make_cleanup (xfree
, tem
);
17493 include_name_to_compare
= tem
;
17497 pst_filename
= pst
->filename
;
17498 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17500 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17501 pst_filename
, (char *)NULL
);
17502 pst_filename
= copied_name
;
17505 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17507 if (copied_name
!= NULL
)
17508 xfree (copied_name
);
17512 return include_name
;
17515 /* State machine to track the state of the line number program. */
17519 /* These are part of the standard DWARF line number state machine. */
17521 unsigned char op_index
;
17526 unsigned int discriminator
;
17528 /* Additional bits of state we need to track. */
17530 /* The last file that we called dwarf2_start_subfile for.
17531 This is only used for TLLs. */
17532 unsigned int last_file
;
17533 /* The last file a line number was recorded for. */
17534 struct subfile
*last_subfile
;
17536 /* The function to call to record a line. */
17537 record_line_ftype
*record_line
;
17539 /* The last line number that was recorded, used to coalesce
17540 consecutive entries for the same line. This can happen, for
17541 example, when discriminators are present. PR 17276. */
17542 unsigned int last_line
;
17543 int line_has_non_zero_discriminator
;
17544 } lnp_state_machine
;
17546 /* There's a lot of static state to pass to dwarf_record_line.
17547 This keeps it all together. */
17552 struct gdbarch
*gdbarch
;
17554 /* The line number header. */
17555 struct line_header
*line_header
;
17557 /* Non-zero if we're recording lines.
17558 Otherwise we're building partial symtabs and are just interested in
17559 finding include files mentioned by the line number program. */
17560 int record_lines_p
;
17561 } lnp_reader_state
;
17563 /* Ignore this record_line request. */
17566 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17571 /* Return non-zero if we should add LINE to the line number table.
17572 LINE is the line to add, LAST_LINE is the last line that was added,
17573 LAST_SUBFILE is the subfile for LAST_LINE.
17574 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17575 had a non-zero discriminator.
17577 We have to be careful in the presence of discriminators.
17578 E.g., for this line:
17580 for (i = 0; i < 100000; i++);
17582 clang can emit four line number entries for that one line,
17583 each with a different discriminator.
17584 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17586 However, we want gdb to coalesce all four entries into one.
17587 Otherwise the user could stepi into the middle of the line and
17588 gdb would get confused about whether the pc really was in the
17589 middle of the line.
17591 Things are further complicated by the fact that two consecutive
17592 line number entries for the same line is a heuristic used by gcc
17593 to denote the end of the prologue. So we can't just discard duplicate
17594 entries, we have to be selective about it. The heuristic we use is
17595 that we only collapse consecutive entries for the same line if at least
17596 one of those entries has a non-zero discriminator. PR 17276.
17598 Note: Addresses in the line number state machine can never go backwards
17599 within one sequence, thus this coalescing is ok. */
17602 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17603 int line_has_non_zero_discriminator
,
17604 struct subfile
*last_subfile
)
17606 if (current_subfile
!= last_subfile
)
17608 if (line
!= last_line
)
17610 /* Same line for the same file that we've seen already.
17611 As a last check, for pr 17276, only record the line if the line
17612 has never had a non-zero discriminator. */
17613 if (!line_has_non_zero_discriminator
)
17618 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17619 in the line table of subfile SUBFILE. */
17622 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17623 unsigned int line
, CORE_ADDR address
,
17624 record_line_ftype p_record_line
)
17626 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17628 if (dwarf_line_debug
)
17630 fprintf_unfiltered (gdb_stdlog
,
17631 "Recording line %u, file %s, address %s\n",
17632 line
, lbasename (subfile
->name
),
17633 paddress (gdbarch
, address
));
17636 (*p_record_line
) (subfile
, line
, addr
);
17639 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17640 Mark the end of a set of line number records.
17641 The arguments are the same as for dwarf_record_line_1.
17642 If SUBFILE is NULL the request is ignored. */
17645 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17646 CORE_ADDR address
, record_line_ftype p_record_line
)
17648 if (subfile
== NULL
)
17651 if (dwarf_line_debug
)
17653 fprintf_unfiltered (gdb_stdlog
,
17654 "Finishing current line, file %s, address %s\n",
17655 lbasename (subfile
->name
),
17656 paddress (gdbarch
, address
));
17659 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
17662 /* Record the line in STATE.
17663 END_SEQUENCE is non-zero if we're processing the end of a sequence. */
17666 dwarf_record_line (lnp_reader_state
*reader
, lnp_state_machine
*state
,
17669 const struct line_header
*lh
= reader
->line_header
;
17670 unsigned int file
, line
, discriminator
;
17673 file
= state
->file
;
17674 line
= state
->line
;
17675 is_stmt
= state
->is_stmt
;
17676 discriminator
= state
->discriminator
;
17678 if (dwarf_line_debug
)
17680 fprintf_unfiltered (gdb_stdlog
,
17681 "Processing actual line %u: file %u,"
17682 " address %s, is_stmt %u, discrim %u\n",
17684 paddress (reader
->gdbarch
, state
->address
),
17685 is_stmt
, discriminator
);
17688 if (file
== 0 || file
- 1 >= lh
->num_file_names
)
17689 dwarf2_debug_line_missing_file_complaint ();
17690 /* For now we ignore lines not starting on an instruction boundary.
17691 But not when processing end_sequence for compatibility with the
17692 previous version of the code. */
17693 else if (state
->op_index
== 0 || end_sequence
)
17695 lh
->file_names
[file
- 1].included_p
= 1;
17696 if (reader
->record_lines_p
&& is_stmt
)
17698 if (state
->last_subfile
!= current_subfile
|| end_sequence
)
17700 dwarf_finish_line (reader
->gdbarch
, state
->last_subfile
,
17701 state
->address
, state
->record_line
);
17706 if (dwarf_record_line_p (line
, state
->last_line
,
17707 state
->line_has_non_zero_discriminator
,
17708 state
->last_subfile
))
17710 dwarf_record_line_1 (reader
->gdbarch
, current_subfile
,
17711 line
, state
->address
,
17712 state
->record_line
);
17714 state
->last_subfile
= current_subfile
;
17715 state
->last_line
= line
;
17721 /* Initialize STATE for the start of a line number program. */
17724 init_lnp_state_machine (lnp_state_machine
*state
,
17725 const lnp_reader_state
*reader
)
17727 memset (state
, 0, sizeof (*state
));
17729 /* Just starting, there is no "last file". */
17730 state
->last_file
= 0;
17731 state
->last_subfile
= NULL
;
17733 state
->record_line
= record_line
;
17735 state
->last_line
= 0;
17736 state
->line_has_non_zero_discriminator
= 0;
17738 /* Initialize these according to the DWARF spec. */
17739 state
->op_index
= 0;
17742 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
17743 was a line entry for it so that the backend has a chance to adjust it
17744 and also record it in case it needs it. This is currently used by MIPS
17745 code, cf. `mips_adjust_dwarf2_line'. */
17746 state
->address
= gdbarch_adjust_dwarf2_line (reader
->gdbarch
, 0, 0);
17747 state
->is_stmt
= reader
->line_header
->default_is_stmt
;
17748 state
->discriminator
= 0;
17751 /* Check address and if invalid nop-out the rest of the lines in this
17755 check_line_address (struct dwarf2_cu
*cu
, lnp_state_machine
*state
,
17756 const gdb_byte
*line_ptr
,
17757 CORE_ADDR lowpc
, CORE_ADDR address
)
17759 /* If address < lowpc then it's not a usable value, it's outside the
17760 pc range of the CU. However, we restrict the test to only address
17761 values of zero to preserve GDB's previous behaviour which is to
17762 handle the specific case of a function being GC'd by the linker. */
17764 if (address
== 0 && address
< lowpc
)
17766 /* This line table is for a function which has been
17767 GCd by the linker. Ignore it. PR gdb/12528 */
17769 struct objfile
*objfile
= cu
->objfile
;
17770 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
17772 complaint (&symfile_complaints
,
17773 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
17774 line_offset
, objfile_name (objfile
));
17775 state
->record_line
= noop_record_line
;
17776 /* Note: sm.record_line is left as noop_record_line
17777 until we see DW_LNE_end_sequence. */
17781 /* Subroutine of dwarf_decode_lines to simplify it.
17782 Process the line number information in LH.
17783 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
17784 program in order to set included_p for every referenced header. */
17787 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17788 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17790 const gdb_byte
*line_ptr
, *extended_end
;
17791 const gdb_byte
*line_end
;
17792 unsigned int bytes_read
, extended_len
;
17793 unsigned char op_code
, extended_op
;
17794 CORE_ADDR baseaddr
;
17795 struct objfile
*objfile
= cu
->objfile
;
17796 bfd
*abfd
= objfile
->obfd
;
17797 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17798 /* Non-zero if we're recording line info (as opposed to building partial
17800 int record_lines_p
= !decode_for_pst_p
;
17801 /* A collection of things we need to pass to dwarf_record_line. */
17802 lnp_reader_state reader_state
;
17804 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17806 line_ptr
= lh
->statement_program_start
;
17807 line_end
= lh
->statement_program_end
;
17809 reader_state
.gdbarch
= gdbarch
;
17810 reader_state
.line_header
= lh
;
17811 reader_state
.record_lines_p
= record_lines_p
;
17813 /* Read the statement sequences until there's nothing left. */
17814 while (line_ptr
< line_end
)
17816 /* The DWARF line number program state machine. */
17817 lnp_state_machine state_machine
;
17818 int end_sequence
= 0;
17820 /* Reset the state machine at the start of each sequence. */
17821 init_lnp_state_machine (&state_machine
, &reader_state
);
17823 if (record_lines_p
&& lh
->num_file_names
>= state_machine
.file
)
17825 /* Start a subfile for the current file of the state machine. */
17826 /* lh->include_dirs and lh->file_names are 0-based, but the
17827 directory and file name numbers in the statement program
17829 struct file_entry
*fe
= &lh
->file_names
[state_machine
.file
- 1];
17830 const char *dir
= NULL
;
17832 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17833 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17835 dwarf2_start_subfile (fe
->name
, dir
);
17838 /* Decode the table. */
17839 while (line_ptr
< line_end
&& !end_sequence
)
17841 op_code
= read_1_byte (abfd
, line_ptr
);
17844 if (op_code
>= lh
->opcode_base
)
17846 /* Special opcode. */
17847 unsigned char adj_opcode
;
17848 CORE_ADDR addr_adj
;
17851 adj_opcode
= op_code
- lh
->opcode_base
;
17852 addr_adj
= (((state_machine
.op_index
17853 + (adj_opcode
/ lh
->line_range
))
17854 / lh
->maximum_ops_per_instruction
)
17855 * lh
->minimum_instruction_length
);
17856 state_machine
.address
17857 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17858 state_machine
.op_index
= ((state_machine
.op_index
17859 + (adj_opcode
/ lh
->line_range
))
17860 % lh
->maximum_ops_per_instruction
);
17861 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17862 state_machine
.line
+= line_delta
;
17863 if (line_delta
!= 0)
17864 state_machine
.line_has_non_zero_discriminator
17865 = state_machine
.discriminator
!= 0;
17867 dwarf_record_line (&reader_state
, &state_machine
, 0);
17868 state_machine
.discriminator
= 0;
17870 else switch (op_code
)
17872 case DW_LNS_extended_op
:
17873 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17875 line_ptr
+= bytes_read
;
17876 extended_end
= line_ptr
+ extended_len
;
17877 extended_op
= read_1_byte (abfd
, line_ptr
);
17879 switch (extended_op
)
17881 case DW_LNE_end_sequence
:
17882 state_machine
.record_line
= record_line
;
17885 case DW_LNE_set_address
:
17888 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17890 line_ptr
+= bytes_read
;
17891 check_line_address (cu
, &state_machine
, line_ptr
,
17893 state_machine
.op_index
= 0;
17894 address
+= baseaddr
;
17895 state_machine
.address
17896 = gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17899 case DW_LNE_define_file
:
17901 const char *cur_file
;
17902 unsigned int dir_index
, mod_time
, length
;
17904 cur_file
= read_direct_string (abfd
, line_ptr
,
17906 line_ptr
+= bytes_read
;
17908 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17909 line_ptr
+= bytes_read
;
17911 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17912 line_ptr
+= bytes_read
;
17914 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17915 line_ptr
+= bytes_read
;
17916 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17919 case DW_LNE_set_discriminator
:
17920 /* The discriminator is not interesting to the debugger;
17921 just ignore it. We still need to check its value though:
17922 if there are consecutive entries for the same
17923 (non-prologue) line we want to coalesce them.
17925 state_machine
.discriminator
17926 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17927 state_machine
.line_has_non_zero_discriminator
17928 |= state_machine
.discriminator
!= 0;
17929 line_ptr
+= bytes_read
;
17932 complaint (&symfile_complaints
,
17933 _("mangled .debug_line section"));
17936 /* Make sure that we parsed the extended op correctly. If e.g.
17937 we expected a different address size than the producer used,
17938 we may have read the wrong number of bytes. */
17939 if (line_ptr
!= extended_end
)
17941 complaint (&symfile_complaints
,
17942 _("mangled .debug_line section"));
17947 dwarf_record_line (&reader_state
, &state_machine
, 0);
17948 state_machine
.discriminator
= 0;
17950 case DW_LNS_advance_pc
:
17953 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17954 CORE_ADDR addr_adj
;
17956 addr_adj
= (((state_machine
.op_index
+ adjust
)
17957 / lh
->maximum_ops_per_instruction
)
17958 * lh
->minimum_instruction_length
);
17959 state_machine
.address
17960 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17961 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
17962 % lh
->maximum_ops_per_instruction
);
17963 line_ptr
+= bytes_read
;
17966 case DW_LNS_advance_line
:
17969 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17971 state_machine
.line
+= line_delta
;
17972 if (line_delta
!= 0)
17973 state_machine
.line_has_non_zero_discriminator
17974 = state_machine
.discriminator
!= 0;
17975 line_ptr
+= bytes_read
;
17978 case DW_LNS_set_file
:
17980 /* The arrays lh->include_dirs and lh->file_names are
17981 0-based, but the directory and file name numbers in
17982 the statement program are 1-based. */
17983 struct file_entry
*fe
;
17984 const char *dir
= NULL
;
17986 state_machine
.file
= read_unsigned_leb128 (abfd
, line_ptr
,
17988 line_ptr
+= bytes_read
;
17989 if (state_machine
.file
== 0
17990 || state_machine
.file
- 1 >= lh
->num_file_names
)
17991 dwarf2_debug_line_missing_file_complaint ();
17994 fe
= &lh
->file_names
[state_machine
.file
- 1];
17995 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
17996 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17997 if (record_lines_p
)
17999 state_machine
.last_subfile
= current_subfile
;
18000 state_machine
.line_has_non_zero_discriminator
18001 = state_machine
.discriminator
!= 0;
18002 dwarf2_start_subfile (fe
->name
, dir
);
18007 case DW_LNS_set_column
:
18008 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18009 line_ptr
+= bytes_read
;
18011 case DW_LNS_negate_stmt
:
18012 state_machine
.is_stmt
= (!state_machine
.is_stmt
);
18014 case DW_LNS_set_basic_block
:
18016 /* Add to the address register of the state machine the
18017 address increment value corresponding to special opcode
18018 255. I.e., this value is scaled by the minimum
18019 instruction length since special opcode 255 would have
18020 scaled the increment. */
18021 case DW_LNS_const_add_pc
:
18023 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
18024 CORE_ADDR addr_adj
;
18026 addr_adj
= (((state_machine
.op_index
+ adjust
)
18027 / lh
->maximum_ops_per_instruction
)
18028 * lh
->minimum_instruction_length
);
18029 state_machine
.address
18030 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18031 state_machine
.op_index
= ((state_machine
.op_index
+ adjust
)
18032 % lh
->maximum_ops_per_instruction
);
18035 case DW_LNS_fixed_advance_pc
:
18037 CORE_ADDR addr_adj
;
18039 addr_adj
= read_2_bytes (abfd
, line_ptr
);
18040 state_machine
.address
18041 += gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
18042 state_machine
.op_index
= 0;
18048 /* Unknown standard opcode, ignore it. */
18051 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18053 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18054 line_ptr
+= bytes_read
;
18061 dwarf2_debug_line_missing_end_sequence_complaint ();
18063 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18064 in which case we still finish recording the last line). */
18065 dwarf_record_line (&reader_state
, &state_machine
, 1);
18069 /* Decode the Line Number Program (LNP) for the given line_header
18070 structure and CU. The actual information extracted and the type
18071 of structures created from the LNP depends on the value of PST.
18073 1. If PST is NULL, then this procedure uses the data from the program
18074 to create all necessary symbol tables, and their linetables.
18076 2. If PST is not NULL, this procedure reads the program to determine
18077 the list of files included by the unit represented by PST, and
18078 builds all the associated partial symbol tables.
18080 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18081 It is used for relative paths in the line table.
18082 NOTE: When processing partial symtabs (pst != NULL),
18083 comp_dir == pst->dirname.
18085 NOTE: It is important that psymtabs have the same file name (via strcmp)
18086 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18087 symtab we don't use it in the name of the psymtabs we create.
18088 E.g. expand_line_sal requires this when finding psymtabs to expand.
18089 A good testcase for this is mb-inline.exp.
18091 LOWPC is the lowest address in CU (or 0 if not known).
18093 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18094 for its PC<->lines mapping information. Otherwise only the filename
18095 table is read in. */
18098 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18099 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18100 CORE_ADDR lowpc
, int decode_mapping
)
18102 struct objfile
*objfile
= cu
->objfile
;
18103 const int decode_for_pst_p
= (pst
!= NULL
);
18105 if (decode_mapping
)
18106 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18108 if (decode_for_pst_p
)
18112 /* Now that we're done scanning the Line Header Program, we can
18113 create the psymtab of each included file. */
18114 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
18115 if (lh
->file_names
[file_index
].included_p
== 1)
18117 const char *include_name
=
18118 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18119 if (include_name
!= NULL
)
18120 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18125 /* Make sure a symtab is created for every file, even files
18126 which contain only variables (i.e. no code with associated
18128 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18131 for (i
= 0; i
< lh
->num_file_names
; i
++)
18133 const char *dir
= NULL
;
18134 struct file_entry
*fe
;
18136 fe
= &lh
->file_names
[i
];
18137 if (fe
->dir_index
&& lh
->include_dirs
!= NULL
)
18138 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
18139 dwarf2_start_subfile (fe
->name
, dir
);
18141 if (current_subfile
->symtab
== NULL
)
18143 current_subfile
->symtab
18144 = allocate_symtab (cust
, current_subfile
->name
);
18146 fe
->symtab
= current_subfile
->symtab
;
18151 /* Start a subfile for DWARF. FILENAME is the name of the file and
18152 DIRNAME the name of the source directory which contains FILENAME
18153 or NULL if not known.
18154 This routine tries to keep line numbers from identical absolute and
18155 relative file names in a common subfile.
18157 Using the `list' example from the GDB testsuite, which resides in
18158 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18159 of /srcdir/list0.c yields the following debugging information for list0.c:
18161 DW_AT_name: /srcdir/list0.c
18162 DW_AT_comp_dir: /compdir
18163 files.files[0].name: list0.h
18164 files.files[0].dir: /srcdir
18165 files.files[1].name: list0.c
18166 files.files[1].dir: /srcdir
18168 The line number information for list0.c has to end up in a single
18169 subfile, so that `break /srcdir/list0.c:1' works as expected.
18170 start_subfile will ensure that this happens provided that we pass the
18171 concatenation of files.files[1].dir and files.files[1].name as the
18175 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18179 /* In order not to lose the line information directory,
18180 we concatenate it to the filename when it makes sense.
18181 Note that the Dwarf3 standard says (speaking of filenames in line
18182 information): ``The directory index is ignored for file names
18183 that represent full path names''. Thus ignoring dirname in the
18184 `else' branch below isn't an issue. */
18186 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18188 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18192 start_subfile (filename
);
18198 /* Start a symtab for DWARF.
18199 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18201 static struct compunit_symtab
*
18202 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18203 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18205 struct compunit_symtab
*cust
18206 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18208 record_debugformat ("DWARF 2");
18209 record_producer (cu
->producer
);
18211 /* We assume that we're processing GCC output. */
18212 processing_gcc_compilation
= 2;
18214 cu
->processing_has_namespace_info
= 0;
18220 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18221 struct dwarf2_cu
*cu
)
18223 struct objfile
*objfile
= cu
->objfile
;
18224 struct comp_unit_head
*cu_header
= &cu
->header
;
18226 /* NOTE drow/2003-01-30: There used to be a comment and some special
18227 code here to turn a symbol with DW_AT_external and a
18228 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
18229 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
18230 with some versions of binutils) where shared libraries could have
18231 relocations against symbols in their debug information - the
18232 minimal symbol would have the right address, but the debug info
18233 would not. It's no longer necessary, because we will explicitly
18234 apply relocations when we read in the debug information now. */
18236 /* A DW_AT_location attribute with no contents indicates that a
18237 variable has been optimized away. */
18238 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18240 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18244 /* Handle one degenerate form of location expression specially, to
18245 preserve GDB's previous behavior when section offsets are
18246 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18247 then mark this symbol as LOC_STATIC. */
18249 if (attr_form_is_block (attr
)
18250 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18251 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18252 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18253 && (DW_BLOCK (attr
)->size
18254 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18256 unsigned int dummy
;
18258 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18259 SYMBOL_VALUE_ADDRESS (sym
) =
18260 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18262 SYMBOL_VALUE_ADDRESS (sym
) =
18263 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18264 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18265 fixup_symbol_section (sym
, objfile
);
18266 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18267 SYMBOL_SECTION (sym
));
18271 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18272 expression evaluator, and use LOC_COMPUTED only when necessary
18273 (i.e. when the value of a register or memory location is
18274 referenced, or a thread-local block, etc.). Then again, it might
18275 not be worthwhile. I'm assuming that it isn't unless performance
18276 or memory numbers show me otherwise. */
18278 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18280 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18281 cu
->has_loclist
= 1;
18284 /* Given a pointer to a DWARF information entry, figure out if we need
18285 to make a symbol table entry for it, and if so, create a new entry
18286 and return a pointer to it.
18287 If TYPE is NULL, determine symbol type from the die, otherwise
18288 used the passed type.
18289 If SPACE is not NULL, use it to hold the new symbol. If it is
18290 NULL, allocate a new symbol on the objfile's obstack. */
18292 static struct symbol
*
18293 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18294 struct symbol
*space
)
18296 struct objfile
*objfile
= cu
->objfile
;
18297 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18298 struct symbol
*sym
= NULL
;
18300 struct attribute
*attr
= NULL
;
18301 struct attribute
*attr2
= NULL
;
18302 CORE_ADDR baseaddr
;
18303 struct pending
**list_to_add
= NULL
;
18305 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18307 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18309 name
= dwarf2_name (die
, cu
);
18312 const char *linkagename
;
18313 int suppress_add
= 0;
18318 sym
= allocate_symbol (objfile
);
18319 OBJSTAT (objfile
, n_syms
++);
18321 /* Cache this symbol's name and the name's demangled form (if any). */
18322 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18323 linkagename
= dwarf2_physname (name
, die
, cu
);
18324 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18326 /* Fortran does not have mangling standard and the mangling does differ
18327 between gfortran, iFort etc. */
18328 if (cu
->language
== language_fortran
18329 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18330 symbol_set_demangled_name (&(sym
->ginfo
),
18331 dwarf2_full_name (name
, die
, cu
),
18334 /* Default assumptions.
18335 Use the passed type or decode it from the die. */
18336 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18337 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18339 SYMBOL_TYPE (sym
) = type
;
18341 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18342 attr
= dwarf2_attr (die
,
18343 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18347 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18350 attr
= dwarf2_attr (die
,
18351 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18355 int file_index
= DW_UNSND (attr
);
18357 if (cu
->line_header
== NULL
18358 || file_index
> cu
->line_header
->num_file_names
)
18359 complaint (&symfile_complaints
,
18360 _("file index out of range"));
18361 else if (file_index
> 0)
18363 struct file_entry
*fe
;
18365 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18366 symbol_set_symtab (sym
, fe
->symtab
);
18373 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18378 addr
= attr_value_as_address (attr
);
18379 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18380 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18382 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18383 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18384 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18385 add_symbol_to_list (sym
, cu
->list_in_scope
);
18387 case DW_TAG_subprogram
:
18388 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18390 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18391 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18392 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18393 || cu
->language
== language_ada
)
18395 /* Subprograms marked external are stored as a global symbol.
18396 Ada subprograms, whether marked external or not, are always
18397 stored as a global symbol, because we want to be able to
18398 access them globally. For instance, we want to be able
18399 to break on a nested subprogram without having to
18400 specify the context. */
18401 list_to_add
= &global_symbols
;
18405 list_to_add
= cu
->list_in_scope
;
18408 case DW_TAG_inlined_subroutine
:
18409 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18411 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18412 SYMBOL_INLINED (sym
) = 1;
18413 list_to_add
= cu
->list_in_scope
;
18415 case DW_TAG_template_value_param
:
18417 /* Fall through. */
18418 case DW_TAG_constant
:
18419 case DW_TAG_variable
:
18420 case DW_TAG_member
:
18421 /* Compilation with minimal debug info may result in
18422 variables with missing type entries. Change the
18423 misleading `void' type to something sensible. */
18424 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18426 = objfile_type (objfile
)->nodebug_data_symbol
;
18428 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18429 /* In the case of DW_TAG_member, we should only be called for
18430 static const members. */
18431 if (die
->tag
== DW_TAG_member
)
18433 /* dwarf2_add_field uses die_is_declaration,
18434 so we do the same. */
18435 gdb_assert (die_is_declaration (die
, cu
));
18440 dwarf2_const_value (attr
, sym
, cu
);
18441 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18444 if (attr2
&& (DW_UNSND (attr2
) != 0))
18445 list_to_add
= &global_symbols
;
18447 list_to_add
= cu
->list_in_scope
;
18451 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18454 var_decode_location (attr
, sym
, cu
);
18455 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18457 /* Fortran explicitly imports any global symbols to the local
18458 scope by DW_TAG_common_block. */
18459 if (cu
->language
== language_fortran
&& die
->parent
18460 && die
->parent
->tag
== DW_TAG_common_block
)
18463 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18464 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18465 && !dwarf2_per_objfile
->has_section_at_zero
)
18467 /* When a static variable is eliminated by the linker,
18468 the corresponding debug information is not stripped
18469 out, but the variable address is set to null;
18470 do not add such variables into symbol table. */
18472 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18474 /* Workaround gfortran PR debug/40040 - it uses
18475 DW_AT_location for variables in -fPIC libraries which may
18476 get overriden by other libraries/executable and get
18477 a different address. Resolve it by the minimal symbol
18478 which may come from inferior's executable using copy
18479 relocation. Make this workaround only for gfortran as for
18480 other compilers GDB cannot guess the minimal symbol
18481 Fortran mangling kind. */
18482 if (cu
->language
== language_fortran
&& die
->parent
18483 && die
->parent
->tag
== DW_TAG_module
18485 && startswith (cu
->producer
, "GNU Fortran "))
18486 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18488 /* A variable with DW_AT_external is never static,
18489 but it may be block-scoped. */
18490 list_to_add
= (cu
->list_in_scope
== &file_symbols
18491 ? &global_symbols
: cu
->list_in_scope
);
18494 list_to_add
= cu
->list_in_scope
;
18498 /* We do not know the address of this symbol.
18499 If it is an external symbol and we have type information
18500 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18501 The address of the variable will then be determined from
18502 the minimal symbol table whenever the variable is
18504 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18506 /* Fortran explicitly imports any global symbols to the local
18507 scope by DW_TAG_common_block. */
18508 if (cu
->language
== language_fortran
&& die
->parent
18509 && die
->parent
->tag
== DW_TAG_common_block
)
18511 /* SYMBOL_CLASS doesn't matter here because
18512 read_common_block is going to reset it. */
18514 list_to_add
= cu
->list_in_scope
;
18516 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18517 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18519 /* A variable with DW_AT_external is never static, but it
18520 may be block-scoped. */
18521 list_to_add
= (cu
->list_in_scope
== &file_symbols
18522 ? &global_symbols
: cu
->list_in_scope
);
18524 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18526 else if (!die_is_declaration (die
, cu
))
18528 /* Use the default LOC_OPTIMIZED_OUT class. */
18529 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18531 list_to_add
= cu
->list_in_scope
;
18535 case DW_TAG_formal_parameter
:
18536 /* If we are inside a function, mark this as an argument. If
18537 not, we might be looking at an argument to an inlined function
18538 when we do not have enough information to show inlined frames;
18539 pretend it's a local variable in that case so that the user can
18541 if (context_stack_depth
> 0
18542 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18543 SYMBOL_IS_ARGUMENT (sym
) = 1;
18544 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18547 var_decode_location (attr
, sym
, cu
);
18549 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18552 dwarf2_const_value (attr
, sym
, cu
);
18555 list_to_add
= cu
->list_in_scope
;
18557 case DW_TAG_unspecified_parameters
:
18558 /* From varargs functions; gdb doesn't seem to have any
18559 interest in this information, so just ignore it for now.
18562 case DW_TAG_template_type_param
:
18564 /* Fall through. */
18565 case DW_TAG_class_type
:
18566 case DW_TAG_interface_type
:
18567 case DW_TAG_structure_type
:
18568 case DW_TAG_union_type
:
18569 case DW_TAG_set_type
:
18570 case DW_TAG_enumeration_type
:
18571 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18572 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18575 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18576 really ever be static objects: otherwise, if you try
18577 to, say, break of a class's method and you're in a file
18578 which doesn't mention that class, it won't work unless
18579 the check for all static symbols in lookup_symbol_aux
18580 saves you. See the OtherFileClass tests in
18581 gdb.c++/namespace.exp. */
18585 list_to_add
= (cu
->list_in_scope
== &file_symbols
18586 && (cu
->language
== language_cplus
18587 || cu
->language
== language_java
)
18588 ? &global_symbols
: cu
->list_in_scope
);
18590 /* The semantics of C++ state that "struct foo {
18591 ... }" also defines a typedef for "foo". A Java
18592 class declaration also defines a typedef for the
18594 if (cu
->language
== language_cplus
18595 || cu
->language
== language_java
18596 || cu
->language
== language_ada
18597 || cu
->language
== language_d
)
18599 /* The symbol's name is already allocated along
18600 with this objfile, so we don't need to
18601 duplicate it for the type. */
18602 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18603 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18608 case DW_TAG_typedef
:
18609 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18610 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18611 list_to_add
= cu
->list_in_scope
;
18613 case DW_TAG_base_type
:
18614 case DW_TAG_subrange_type
:
18615 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18616 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18617 list_to_add
= cu
->list_in_scope
;
18619 case DW_TAG_enumerator
:
18620 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18623 dwarf2_const_value (attr
, sym
, cu
);
18626 /* NOTE: carlton/2003-11-10: See comment above in the
18627 DW_TAG_class_type, etc. block. */
18629 list_to_add
= (cu
->list_in_scope
== &file_symbols
18630 && (cu
->language
== language_cplus
18631 || cu
->language
== language_java
)
18632 ? &global_symbols
: cu
->list_in_scope
);
18635 case DW_TAG_imported_declaration
:
18636 case DW_TAG_namespace
:
18637 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18638 list_to_add
= &global_symbols
;
18640 case DW_TAG_module
:
18641 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18642 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18643 list_to_add
= &global_symbols
;
18645 case DW_TAG_common_block
:
18646 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18647 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18648 add_symbol_to_list (sym
, cu
->list_in_scope
);
18651 /* Not a tag we recognize. Hopefully we aren't processing
18652 trash data, but since we must specifically ignore things
18653 we don't recognize, there is nothing else we should do at
18655 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18656 dwarf_tag_name (die
->tag
));
18662 sym
->hash_next
= objfile
->template_symbols
;
18663 objfile
->template_symbols
= sym
;
18664 list_to_add
= NULL
;
18667 if (list_to_add
!= NULL
)
18668 add_symbol_to_list (sym
, list_to_add
);
18670 /* For the benefit of old versions of GCC, check for anonymous
18671 namespaces based on the demangled name. */
18672 if (!cu
->processing_has_namespace_info
18673 && cu
->language
== language_cplus
)
18674 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18679 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18681 static struct symbol
*
18682 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18684 return new_symbol_full (die
, type
, cu
, NULL
);
18687 /* Given an attr with a DW_FORM_dataN value in host byte order,
18688 zero-extend it as appropriate for the symbol's type. The DWARF
18689 standard (v4) is not entirely clear about the meaning of using
18690 DW_FORM_dataN for a constant with a signed type, where the type is
18691 wider than the data. The conclusion of a discussion on the DWARF
18692 list was that this is unspecified. We choose to always zero-extend
18693 because that is the interpretation long in use by GCC. */
18696 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18697 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18699 struct objfile
*objfile
= cu
->objfile
;
18700 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18701 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18702 LONGEST l
= DW_UNSND (attr
);
18704 if (bits
< sizeof (*value
) * 8)
18706 l
&= ((LONGEST
) 1 << bits
) - 1;
18709 else if (bits
== sizeof (*value
) * 8)
18713 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
18714 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18721 /* Read a constant value from an attribute. Either set *VALUE, or if
18722 the value does not fit in *VALUE, set *BYTES - either already
18723 allocated on the objfile obstack, or newly allocated on OBSTACK,
18724 or, set *BATON, if we translated the constant to a location
18728 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18729 const char *name
, struct obstack
*obstack
,
18730 struct dwarf2_cu
*cu
,
18731 LONGEST
*value
, const gdb_byte
**bytes
,
18732 struct dwarf2_locexpr_baton
**baton
)
18734 struct objfile
*objfile
= cu
->objfile
;
18735 struct comp_unit_head
*cu_header
= &cu
->header
;
18736 struct dwarf_block
*blk
;
18737 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18738 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18744 switch (attr
->form
)
18747 case DW_FORM_GNU_addr_index
:
18751 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18752 dwarf2_const_value_length_mismatch_complaint (name
,
18753 cu_header
->addr_size
,
18754 TYPE_LENGTH (type
));
18755 /* Symbols of this form are reasonably rare, so we just
18756 piggyback on the existing location code rather than writing
18757 a new implementation of symbol_computed_ops. */
18758 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
18759 (*baton
)->per_cu
= cu
->per_cu
;
18760 gdb_assert ((*baton
)->per_cu
);
18762 (*baton
)->size
= 2 + cu_header
->addr_size
;
18763 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
18764 (*baton
)->data
= data
;
18766 data
[0] = DW_OP_addr
;
18767 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18768 byte_order
, DW_ADDR (attr
));
18769 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18772 case DW_FORM_string
:
18774 case DW_FORM_GNU_str_index
:
18775 case DW_FORM_GNU_strp_alt
:
18776 /* DW_STRING is already allocated on the objfile obstack, point
18778 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18780 case DW_FORM_block1
:
18781 case DW_FORM_block2
:
18782 case DW_FORM_block4
:
18783 case DW_FORM_block
:
18784 case DW_FORM_exprloc
:
18785 blk
= DW_BLOCK (attr
);
18786 if (TYPE_LENGTH (type
) != blk
->size
)
18787 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18788 TYPE_LENGTH (type
));
18789 *bytes
= blk
->data
;
18792 /* The DW_AT_const_value attributes are supposed to carry the
18793 symbol's value "represented as it would be on the target
18794 architecture." By the time we get here, it's already been
18795 converted to host endianness, so we just need to sign- or
18796 zero-extend it as appropriate. */
18797 case DW_FORM_data1
:
18798 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18800 case DW_FORM_data2
:
18801 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18803 case DW_FORM_data4
:
18804 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18806 case DW_FORM_data8
:
18807 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18810 case DW_FORM_sdata
:
18811 *value
= DW_SND (attr
);
18814 case DW_FORM_udata
:
18815 *value
= DW_UNSND (attr
);
18819 complaint (&symfile_complaints
,
18820 _("unsupported const value attribute form: '%s'"),
18821 dwarf_form_name (attr
->form
));
18828 /* Copy constant value from an attribute to a symbol. */
18831 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18832 struct dwarf2_cu
*cu
)
18834 struct objfile
*objfile
= cu
->objfile
;
18835 struct comp_unit_head
*cu_header
= &cu
->header
;
18837 const gdb_byte
*bytes
;
18838 struct dwarf2_locexpr_baton
*baton
;
18840 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18841 SYMBOL_PRINT_NAME (sym
),
18842 &objfile
->objfile_obstack
, cu
,
18843 &value
, &bytes
, &baton
);
18847 SYMBOL_LOCATION_BATON (sym
) = baton
;
18848 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18850 else if (bytes
!= NULL
)
18852 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18853 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18857 SYMBOL_VALUE (sym
) = value
;
18858 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18862 /* Return the type of the die in question using its DW_AT_type attribute. */
18864 static struct type
*
18865 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18867 struct attribute
*type_attr
;
18869 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18872 /* A missing DW_AT_type represents a void type. */
18873 return objfile_type (cu
->objfile
)->builtin_void
;
18876 return lookup_die_type (die
, type_attr
, cu
);
18879 /* True iff CU's producer generates GNAT Ada auxiliary information
18880 that allows to find parallel types through that information instead
18881 of having to do expensive parallel lookups by type name. */
18884 need_gnat_info (struct dwarf2_cu
*cu
)
18886 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18887 of GNAT produces this auxiliary information, without any indication
18888 that it is produced. Part of enhancing the FSF version of GNAT
18889 to produce that information will be to put in place an indicator
18890 that we can use in order to determine whether the descriptive type
18891 info is available or not. One suggestion that has been made is
18892 to use a new attribute, attached to the CU die. For now, assume
18893 that the descriptive type info is not available. */
18897 /* Return the auxiliary type of the die in question using its
18898 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18899 attribute is not present. */
18901 static struct type
*
18902 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18904 struct attribute
*type_attr
;
18906 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18910 return lookup_die_type (die
, type_attr
, cu
);
18913 /* If DIE has a descriptive_type attribute, then set the TYPE's
18914 descriptive type accordingly. */
18917 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18918 struct dwarf2_cu
*cu
)
18920 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18922 if (descriptive_type
)
18924 ALLOCATE_GNAT_AUX_TYPE (type
);
18925 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18929 /* Return the containing type of the die in question using its
18930 DW_AT_containing_type attribute. */
18932 static struct type
*
18933 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18935 struct attribute
*type_attr
;
18937 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18939 error (_("Dwarf Error: Problem turning containing type into gdb type "
18940 "[in module %s]"), objfile_name (cu
->objfile
));
18942 return lookup_die_type (die
, type_attr
, cu
);
18945 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18947 static struct type
*
18948 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18950 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18951 char *message
, *saved
;
18953 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18954 objfile_name (objfile
),
18955 cu
->header
.offset
.sect_off
,
18956 die
->offset
.sect_off
);
18957 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
18958 message
, strlen (message
));
18961 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18964 /* Look up the type of DIE in CU using its type attribute ATTR.
18965 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18966 DW_AT_containing_type.
18967 If there is no type substitute an error marker. */
18969 static struct type
*
18970 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18971 struct dwarf2_cu
*cu
)
18973 struct objfile
*objfile
= cu
->objfile
;
18974 struct type
*this_type
;
18976 gdb_assert (attr
->name
== DW_AT_type
18977 || attr
->name
== DW_AT_GNAT_descriptive_type
18978 || attr
->name
== DW_AT_containing_type
);
18980 /* First see if we have it cached. */
18982 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18984 struct dwarf2_per_cu_data
*per_cu
;
18985 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18987 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18988 this_type
= get_die_type_at_offset (offset
, per_cu
);
18990 else if (attr_form_is_ref (attr
))
18992 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18994 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18996 else if (attr
->form
== DW_FORM_ref_sig8
)
18998 ULONGEST signature
= DW_SIGNATURE (attr
);
19000 return get_signatured_type (die
, signature
, cu
);
19004 complaint (&symfile_complaints
,
19005 _("Dwarf Error: Bad type attribute %s in DIE"
19006 " at 0x%x [in module %s]"),
19007 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
19008 objfile_name (objfile
));
19009 return build_error_marker_type (cu
, die
);
19012 /* If not cached we need to read it in. */
19014 if (this_type
== NULL
)
19016 struct die_info
*type_die
= NULL
;
19017 struct dwarf2_cu
*type_cu
= cu
;
19019 if (attr_form_is_ref (attr
))
19020 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19021 if (type_die
== NULL
)
19022 return build_error_marker_type (cu
, die
);
19023 /* If we find the type now, it's probably because the type came
19024 from an inter-CU reference and the type's CU got expanded before
19026 this_type
= read_type_die (type_die
, type_cu
);
19029 /* If we still don't have a type use an error marker. */
19031 if (this_type
== NULL
)
19032 return build_error_marker_type (cu
, die
);
19037 /* Return the type in DIE, CU.
19038 Returns NULL for invalid types.
19040 This first does a lookup in die_type_hash,
19041 and only reads the die in if necessary.
19043 NOTE: This can be called when reading in partial or full symbols. */
19045 static struct type
*
19046 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19048 struct type
*this_type
;
19050 this_type
= get_die_type (die
, cu
);
19054 return read_type_die_1 (die
, cu
);
19057 /* Read the type in DIE, CU.
19058 Returns NULL for invalid types. */
19060 static struct type
*
19061 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19063 struct type
*this_type
= NULL
;
19067 case DW_TAG_class_type
:
19068 case DW_TAG_interface_type
:
19069 case DW_TAG_structure_type
:
19070 case DW_TAG_union_type
:
19071 this_type
= read_structure_type (die
, cu
);
19073 case DW_TAG_enumeration_type
:
19074 this_type
= read_enumeration_type (die
, cu
);
19076 case DW_TAG_subprogram
:
19077 case DW_TAG_subroutine_type
:
19078 case DW_TAG_inlined_subroutine
:
19079 this_type
= read_subroutine_type (die
, cu
);
19081 case DW_TAG_array_type
:
19082 this_type
= read_array_type (die
, cu
);
19084 case DW_TAG_set_type
:
19085 this_type
= read_set_type (die
, cu
);
19087 case DW_TAG_pointer_type
:
19088 this_type
= read_tag_pointer_type (die
, cu
);
19090 case DW_TAG_ptr_to_member_type
:
19091 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19093 case DW_TAG_reference_type
:
19094 this_type
= read_tag_reference_type (die
, cu
);
19096 case DW_TAG_const_type
:
19097 this_type
= read_tag_const_type (die
, cu
);
19099 case DW_TAG_volatile_type
:
19100 this_type
= read_tag_volatile_type (die
, cu
);
19102 case DW_TAG_restrict_type
:
19103 this_type
= read_tag_restrict_type (die
, cu
);
19105 case DW_TAG_string_type
:
19106 this_type
= read_tag_string_type (die
, cu
);
19108 case DW_TAG_typedef
:
19109 this_type
= read_typedef (die
, cu
);
19111 case DW_TAG_subrange_type
:
19112 this_type
= read_subrange_type (die
, cu
);
19114 case DW_TAG_base_type
:
19115 this_type
= read_base_type (die
, cu
);
19117 case DW_TAG_unspecified_type
:
19118 this_type
= read_unspecified_type (die
, cu
);
19120 case DW_TAG_namespace
:
19121 this_type
= read_namespace_type (die
, cu
);
19123 case DW_TAG_module
:
19124 this_type
= read_module_type (die
, cu
);
19126 case DW_TAG_atomic_type
:
19127 this_type
= read_tag_atomic_type (die
, cu
);
19130 complaint (&symfile_complaints
,
19131 _("unexpected tag in read_type_die: '%s'"),
19132 dwarf_tag_name (die
->tag
));
19139 /* See if we can figure out if the class lives in a namespace. We do
19140 this by looking for a member function; its demangled name will
19141 contain namespace info, if there is any.
19142 Return the computed name or NULL.
19143 Space for the result is allocated on the objfile's obstack.
19144 This is the full-die version of guess_partial_die_structure_name.
19145 In this case we know DIE has no useful parent. */
19148 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19150 struct die_info
*spec_die
;
19151 struct dwarf2_cu
*spec_cu
;
19152 struct die_info
*child
;
19155 spec_die
= die_specification (die
, &spec_cu
);
19156 if (spec_die
!= NULL
)
19162 for (child
= die
->child
;
19164 child
= child
->sibling
)
19166 if (child
->tag
== DW_TAG_subprogram
)
19168 const char *linkage_name
;
19170 linkage_name
= dwarf2_string_attr (child
, DW_AT_linkage_name
, cu
);
19171 if (linkage_name
== NULL
)
19172 linkage_name
= dwarf2_string_attr (child
, DW_AT_MIPS_linkage_name
,
19174 if (linkage_name
!= NULL
)
19177 = language_class_name_from_physname (cu
->language_defn
,
19181 if (actual_name
!= NULL
)
19183 const char *die_name
= dwarf2_name (die
, cu
);
19185 if (die_name
!= NULL
19186 && strcmp (die_name
, actual_name
) != 0)
19188 /* Strip off the class name from the full name.
19189 We want the prefix. */
19190 int die_name_len
= strlen (die_name
);
19191 int actual_name_len
= strlen (actual_name
);
19193 /* Test for '::' as a sanity check. */
19194 if (actual_name_len
> die_name_len
+ 2
19195 && actual_name
[actual_name_len
19196 - die_name_len
- 1] == ':')
19197 name
= (char *) obstack_copy0 (
19198 &cu
->objfile
->per_bfd
->storage_obstack
,
19199 actual_name
, actual_name_len
- die_name_len
- 2);
19202 xfree (actual_name
);
19211 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19212 prefix part in such case. See
19213 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19216 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19218 struct attribute
*attr
;
19221 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19222 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19225 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
19228 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19230 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19231 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19234 /* dwarf2_name had to be already called. */
19235 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19237 /* Strip the base name, keep any leading namespaces/classes. */
19238 base
= strrchr (DW_STRING (attr
), ':');
19239 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19242 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19244 &base
[-1] - DW_STRING (attr
));
19247 /* Return the name of the namespace/class that DIE is defined within,
19248 or "" if we can't tell. The caller should not xfree the result.
19250 For example, if we're within the method foo() in the following
19260 then determine_prefix on foo's die will return "N::C". */
19262 static const char *
19263 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19265 struct die_info
*parent
, *spec_die
;
19266 struct dwarf2_cu
*spec_cu
;
19267 struct type
*parent_type
;
19270 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19271 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
)
19274 retval
= anonymous_struct_prefix (die
, cu
);
19278 /* We have to be careful in the presence of DW_AT_specification.
19279 For example, with GCC 3.4, given the code
19283 // Definition of N::foo.
19287 then we'll have a tree of DIEs like this:
19289 1: DW_TAG_compile_unit
19290 2: DW_TAG_namespace // N
19291 3: DW_TAG_subprogram // declaration of N::foo
19292 4: DW_TAG_subprogram // definition of N::foo
19293 DW_AT_specification // refers to die #3
19295 Thus, when processing die #4, we have to pretend that we're in
19296 the context of its DW_AT_specification, namely the contex of die
19299 spec_die
= die_specification (die
, &spec_cu
);
19300 if (spec_die
== NULL
)
19301 parent
= die
->parent
;
19304 parent
= spec_die
->parent
;
19308 if (parent
== NULL
)
19310 else if (parent
->building_fullname
)
19313 const char *parent_name
;
19315 /* It has been seen on RealView 2.2 built binaries,
19316 DW_TAG_template_type_param types actually _defined_ as
19317 children of the parent class:
19320 template class <class Enum> Class{};
19321 Class<enum E> class_e;
19323 1: DW_TAG_class_type (Class)
19324 2: DW_TAG_enumeration_type (E)
19325 3: DW_TAG_enumerator (enum1:0)
19326 3: DW_TAG_enumerator (enum2:1)
19328 2: DW_TAG_template_type_param
19329 DW_AT_type DW_FORM_ref_udata (E)
19331 Besides being broken debug info, it can put GDB into an
19332 infinite loop. Consider:
19334 When we're building the full name for Class<E>, we'll start
19335 at Class, and go look over its template type parameters,
19336 finding E. We'll then try to build the full name of E, and
19337 reach here. We're now trying to build the full name of E,
19338 and look over the parent DIE for containing scope. In the
19339 broken case, if we followed the parent DIE of E, we'd again
19340 find Class, and once again go look at its template type
19341 arguments, etc., etc. Simply don't consider such parent die
19342 as source-level parent of this die (it can't be, the language
19343 doesn't allow it), and break the loop here. */
19344 name
= dwarf2_name (die
, cu
);
19345 parent_name
= dwarf2_name (parent
, cu
);
19346 complaint (&symfile_complaints
,
19347 _("template param type '%s' defined within parent '%s'"),
19348 name
? name
: "<unknown>",
19349 parent_name
? parent_name
: "<unknown>");
19353 switch (parent
->tag
)
19355 case DW_TAG_namespace
:
19356 parent_type
= read_type_die (parent
, cu
);
19357 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19358 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19359 Work around this problem here. */
19360 if (cu
->language
== language_cplus
19361 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19363 /* We give a name to even anonymous namespaces. */
19364 return TYPE_TAG_NAME (parent_type
);
19365 case DW_TAG_class_type
:
19366 case DW_TAG_interface_type
:
19367 case DW_TAG_structure_type
:
19368 case DW_TAG_union_type
:
19369 case DW_TAG_module
:
19370 parent_type
= read_type_die (parent
, cu
);
19371 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19372 return TYPE_TAG_NAME (parent_type
);
19374 /* An anonymous structure is only allowed non-static data
19375 members; no typedefs, no member functions, et cetera.
19376 So it does not need a prefix. */
19378 case DW_TAG_compile_unit
:
19379 case DW_TAG_partial_unit
:
19380 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19381 if (cu
->language
== language_cplus
19382 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19383 && die
->child
!= NULL
19384 && (die
->tag
== DW_TAG_class_type
19385 || die
->tag
== DW_TAG_structure_type
19386 || die
->tag
== DW_TAG_union_type
))
19388 char *name
= guess_full_die_structure_name (die
, cu
);
19393 case DW_TAG_enumeration_type
:
19394 parent_type
= read_type_die (parent
, cu
);
19395 if (TYPE_DECLARED_CLASS (parent_type
))
19397 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19398 return TYPE_TAG_NAME (parent_type
);
19401 /* Fall through. */
19403 return determine_prefix (parent
, cu
);
19407 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19408 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19409 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19410 an obconcat, otherwise allocate storage for the result. The CU argument is
19411 used to determine the language and hence, the appropriate separator. */
19413 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19416 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19417 int physname
, struct dwarf2_cu
*cu
)
19419 const char *lead
= "";
19422 if (suffix
== NULL
|| suffix
[0] == '\0'
19423 || prefix
== NULL
|| prefix
[0] == '\0')
19425 else if (cu
->language
== language_java
)
19427 else if (cu
->language
== language_d
)
19429 /* For D, the 'main' function could be defined in any module, but it
19430 should never be prefixed. */
19431 if (strcmp (suffix
, "D main") == 0)
19439 else if (cu
->language
== language_fortran
&& physname
)
19441 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19442 DW_AT_MIPS_linkage_name is preferred and used instead. */
19450 if (prefix
== NULL
)
19452 if (suffix
== NULL
)
19459 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
19461 strcpy (retval
, lead
);
19462 strcat (retval
, prefix
);
19463 strcat (retval
, sep
);
19464 strcat (retval
, suffix
);
19469 /* We have an obstack. */
19470 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19474 /* Return sibling of die, NULL if no sibling. */
19476 static struct die_info
*
19477 sibling_die (struct die_info
*die
)
19479 return die
->sibling
;
19482 /* Get name of a die, return NULL if not found. */
19484 static const char *
19485 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19486 struct obstack
*obstack
)
19488 if (name
&& cu
->language
== language_cplus
)
19490 char *canon_name
= cp_canonicalize_string (name
);
19492 if (canon_name
!= NULL
)
19494 if (strcmp (canon_name
, name
) != 0)
19495 name
= (const char *) obstack_copy0 (obstack
, canon_name
,
19496 strlen (canon_name
));
19497 xfree (canon_name
);
19504 /* Get name of a die, return NULL if not found.
19505 Anonymous namespaces are converted to their magic string. */
19507 static const char *
19508 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19510 struct attribute
*attr
;
19512 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19513 if ((!attr
|| !DW_STRING (attr
))
19514 && die
->tag
!= DW_TAG_namespace
19515 && die
->tag
!= DW_TAG_class_type
19516 && die
->tag
!= DW_TAG_interface_type
19517 && die
->tag
!= DW_TAG_structure_type
19518 && die
->tag
!= DW_TAG_union_type
)
19523 case DW_TAG_compile_unit
:
19524 case DW_TAG_partial_unit
:
19525 /* Compilation units have a DW_AT_name that is a filename, not
19526 a source language identifier. */
19527 case DW_TAG_enumeration_type
:
19528 case DW_TAG_enumerator
:
19529 /* These tags always have simple identifiers already; no need
19530 to canonicalize them. */
19531 return DW_STRING (attr
);
19533 case DW_TAG_namespace
:
19534 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
19535 return DW_STRING (attr
);
19536 return CP_ANONYMOUS_NAMESPACE_STR
;
19538 case DW_TAG_subprogram
:
19539 /* Java constructors will all be named "<init>", so return
19540 the class name when we see this special case. */
19541 if (cu
->language
== language_java
19542 && DW_STRING (attr
) != NULL
19543 && strcmp (DW_STRING (attr
), "<init>") == 0)
19545 struct dwarf2_cu
*spec_cu
= cu
;
19546 struct die_info
*spec_die
;
19548 /* GCJ will output '<init>' for Java constructor names.
19549 For this special case, return the name of the parent class. */
19551 /* GCJ may output subprogram DIEs with AT_specification set.
19552 If so, use the name of the specified DIE. */
19553 spec_die
= die_specification (die
, &spec_cu
);
19554 if (spec_die
!= NULL
)
19555 return dwarf2_name (spec_die
, spec_cu
);
19560 if (die
->tag
== DW_TAG_class_type
)
19561 return dwarf2_name (die
, cu
);
19563 while (die
->tag
!= DW_TAG_compile_unit
19564 && die
->tag
!= DW_TAG_partial_unit
);
19568 case DW_TAG_class_type
:
19569 case DW_TAG_interface_type
:
19570 case DW_TAG_structure_type
:
19571 case DW_TAG_union_type
:
19572 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19573 structures or unions. These were of the form "._%d" in GCC 4.1,
19574 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19575 and GCC 4.4. We work around this problem by ignoring these. */
19576 if (attr
&& DW_STRING (attr
)
19577 && (startswith (DW_STRING (attr
), "._")
19578 || startswith (DW_STRING (attr
), "<anonymous")))
19581 /* GCC might emit a nameless typedef that has a linkage name. See
19582 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19583 if (!attr
|| DW_STRING (attr
) == NULL
)
19585 char *demangled
= NULL
;
19587 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19589 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19591 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19594 /* Avoid demangling DW_STRING (attr) the second time on a second
19595 call for the same DIE. */
19596 if (!DW_STRING_IS_CANONICAL (attr
))
19597 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19603 /* FIXME: we already did this for the partial symbol... */
19606 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19607 demangled
, strlen (demangled
)));
19608 DW_STRING_IS_CANONICAL (attr
) = 1;
19611 /* Strip any leading namespaces/classes, keep only the base name.
19612 DW_AT_name for named DIEs does not contain the prefixes. */
19613 base
= strrchr (DW_STRING (attr
), ':');
19614 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19617 return DW_STRING (attr
);
19626 if (!DW_STRING_IS_CANONICAL (attr
))
19629 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19630 &cu
->objfile
->per_bfd
->storage_obstack
);
19631 DW_STRING_IS_CANONICAL (attr
) = 1;
19633 return DW_STRING (attr
);
19636 /* Return the die that this die in an extension of, or NULL if there
19637 is none. *EXT_CU is the CU containing DIE on input, and the CU
19638 containing the return value on output. */
19640 static struct die_info
*
19641 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19643 struct attribute
*attr
;
19645 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19649 return follow_die_ref (die
, attr
, ext_cu
);
19652 /* Convert a DIE tag into its string name. */
19654 static const char *
19655 dwarf_tag_name (unsigned tag
)
19657 const char *name
= get_DW_TAG_name (tag
);
19660 return "DW_TAG_<unknown>";
19665 /* Convert a DWARF attribute code into its string name. */
19667 static const char *
19668 dwarf_attr_name (unsigned attr
)
19672 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19673 if (attr
== DW_AT_MIPS_fde
)
19674 return "DW_AT_MIPS_fde";
19676 if (attr
== DW_AT_HP_block_index
)
19677 return "DW_AT_HP_block_index";
19680 name
= get_DW_AT_name (attr
);
19683 return "DW_AT_<unknown>";
19688 /* Convert a DWARF value form code into its string name. */
19690 static const char *
19691 dwarf_form_name (unsigned form
)
19693 const char *name
= get_DW_FORM_name (form
);
19696 return "DW_FORM_<unknown>";
19702 dwarf_bool_name (unsigned mybool
)
19710 /* Convert a DWARF type code into its string name. */
19712 static const char *
19713 dwarf_type_encoding_name (unsigned enc
)
19715 const char *name
= get_DW_ATE_name (enc
);
19718 return "DW_ATE_<unknown>";
19724 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19728 print_spaces (indent
, f
);
19729 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19730 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19732 if (die
->parent
!= NULL
)
19734 print_spaces (indent
, f
);
19735 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19736 die
->parent
->offset
.sect_off
);
19739 print_spaces (indent
, f
);
19740 fprintf_unfiltered (f
, " has children: %s\n",
19741 dwarf_bool_name (die
->child
!= NULL
));
19743 print_spaces (indent
, f
);
19744 fprintf_unfiltered (f
, " attributes:\n");
19746 for (i
= 0; i
< die
->num_attrs
; ++i
)
19748 print_spaces (indent
, f
);
19749 fprintf_unfiltered (f
, " %s (%s) ",
19750 dwarf_attr_name (die
->attrs
[i
].name
),
19751 dwarf_form_name (die
->attrs
[i
].form
));
19753 switch (die
->attrs
[i
].form
)
19756 case DW_FORM_GNU_addr_index
:
19757 fprintf_unfiltered (f
, "address: ");
19758 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19760 case DW_FORM_block2
:
19761 case DW_FORM_block4
:
19762 case DW_FORM_block
:
19763 case DW_FORM_block1
:
19764 fprintf_unfiltered (f
, "block: size %s",
19765 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19767 case DW_FORM_exprloc
:
19768 fprintf_unfiltered (f
, "expression: size %s",
19769 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19771 case DW_FORM_ref_addr
:
19772 fprintf_unfiltered (f
, "ref address: ");
19773 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19775 case DW_FORM_GNU_ref_alt
:
19776 fprintf_unfiltered (f
, "alt ref address: ");
19777 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19783 case DW_FORM_ref_udata
:
19784 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19785 (long) (DW_UNSND (&die
->attrs
[i
])));
19787 case DW_FORM_data1
:
19788 case DW_FORM_data2
:
19789 case DW_FORM_data4
:
19790 case DW_FORM_data8
:
19791 case DW_FORM_udata
:
19792 case DW_FORM_sdata
:
19793 fprintf_unfiltered (f
, "constant: %s",
19794 pulongest (DW_UNSND (&die
->attrs
[i
])));
19796 case DW_FORM_sec_offset
:
19797 fprintf_unfiltered (f
, "section offset: %s",
19798 pulongest (DW_UNSND (&die
->attrs
[i
])));
19800 case DW_FORM_ref_sig8
:
19801 fprintf_unfiltered (f
, "signature: %s",
19802 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19804 case DW_FORM_string
:
19806 case DW_FORM_GNU_str_index
:
19807 case DW_FORM_GNU_strp_alt
:
19808 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19809 DW_STRING (&die
->attrs
[i
])
19810 ? DW_STRING (&die
->attrs
[i
]) : "",
19811 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19814 if (DW_UNSND (&die
->attrs
[i
]))
19815 fprintf_unfiltered (f
, "flag: TRUE");
19817 fprintf_unfiltered (f
, "flag: FALSE");
19819 case DW_FORM_flag_present
:
19820 fprintf_unfiltered (f
, "flag: TRUE");
19822 case DW_FORM_indirect
:
19823 /* The reader will have reduced the indirect form to
19824 the "base form" so this form should not occur. */
19825 fprintf_unfiltered (f
,
19826 "unexpected attribute form: DW_FORM_indirect");
19829 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19830 die
->attrs
[i
].form
);
19833 fprintf_unfiltered (f
, "\n");
19838 dump_die_for_error (struct die_info
*die
)
19840 dump_die_shallow (gdb_stderr
, 0, die
);
19844 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19846 int indent
= level
* 4;
19848 gdb_assert (die
!= NULL
);
19850 if (level
>= max_level
)
19853 dump_die_shallow (f
, indent
, die
);
19855 if (die
->child
!= NULL
)
19857 print_spaces (indent
, f
);
19858 fprintf_unfiltered (f
, " Children:");
19859 if (level
+ 1 < max_level
)
19861 fprintf_unfiltered (f
, "\n");
19862 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19866 fprintf_unfiltered (f
,
19867 " [not printed, max nesting level reached]\n");
19871 if (die
->sibling
!= NULL
&& level
> 0)
19873 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19877 /* This is called from the pdie macro in gdbinit.in.
19878 It's not static so gcc will keep a copy callable from gdb. */
19881 dump_die (struct die_info
*die
, int max_level
)
19883 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19887 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19891 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19897 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19901 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19903 sect_offset retval
= { DW_UNSND (attr
) };
19905 if (attr_form_is_ref (attr
))
19908 retval
.sect_off
= 0;
19909 complaint (&symfile_complaints
,
19910 _("unsupported die ref attribute form: '%s'"),
19911 dwarf_form_name (attr
->form
));
19915 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19916 * the value held by the attribute is not constant. */
19919 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19921 if (attr
->form
== DW_FORM_sdata
)
19922 return DW_SND (attr
);
19923 else if (attr
->form
== DW_FORM_udata
19924 || attr
->form
== DW_FORM_data1
19925 || attr
->form
== DW_FORM_data2
19926 || attr
->form
== DW_FORM_data4
19927 || attr
->form
== DW_FORM_data8
)
19928 return DW_UNSND (attr
);
19931 complaint (&symfile_complaints
,
19932 _("Attribute value is not a constant (%s)"),
19933 dwarf_form_name (attr
->form
));
19934 return default_value
;
19938 /* Follow reference or signature attribute ATTR of SRC_DIE.
19939 On entry *REF_CU is the CU of SRC_DIE.
19940 On exit *REF_CU is the CU of the result. */
19942 static struct die_info
*
19943 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19944 struct dwarf2_cu
**ref_cu
)
19946 struct die_info
*die
;
19948 if (attr_form_is_ref (attr
))
19949 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19950 else if (attr
->form
== DW_FORM_ref_sig8
)
19951 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19954 dump_die_for_error (src_die
);
19955 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19956 objfile_name ((*ref_cu
)->objfile
));
19962 /* Follow reference OFFSET.
19963 On entry *REF_CU is the CU of the source die referencing OFFSET.
19964 On exit *REF_CU is the CU of the result.
19965 Returns NULL if OFFSET is invalid. */
19967 static struct die_info
*
19968 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19969 struct dwarf2_cu
**ref_cu
)
19971 struct die_info temp_die
;
19972 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19974 gdb_assert (cu
->per_cu
!= NULL
);
19978 if (cu
->per_cu
->is_debug_types
)
19980 /* .debug_types CUs cannot reference anything outside their CU.
19981 If they need to, they have to reference a signatured type via
19982 DW_FORM_ref_sig8. */
19983 if (! offset_in_cu_p (&cu
->header
, offset
))
19986 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19987 || ! offset_in_cu_p (&cu
->header
, offset
))
19989 struct dwarf2_per_cu_data
*per_cu
;
19991 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19994 /* If necessary, add it to the queue and load its DIEs. */
19995 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19996 load_full_comp_unit (per_cu
, cu
->language
);
19998 target_cu
= per_cu
->cu
;
20000 else if (cu
->dies
== NULL
)
20002 /* We're loading full DIEs during partial symbol reading. */
20003 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20004 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20007 *ref_cu
= target_cu
;
20008 temp_die
.offset
= offset
;
20009 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
20012 /* Follow reference attribute ATTR of SRC_DIE.
20013 On entry *REF_CU is the CU of SRC_DIE.
20014 On exit *REF_CU is the CU of the result. */
20016 static struct die_info
*
20017 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20018 struct dwarf2_cu
**ref_cu
)
20020 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
20021 struct dwarf2_cu
*cu
= *ref_cu
;
20022 struct die_info
*die
;
20024 die
= follow_die_offset (offset
,
20025 (attr
->form
== DW_FORM_GNU_ref_alt
20026 || cu
->per_cu
->is_dwz
),
20029 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20030 "at 0x%x [in module %s]"),
20031 offset
.sect_off
, src_die
->offset
.sect_off
,
20032 objfile_name (cu
->objfile
));
20037 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
20038 Returned value is intended for DW_OP_call*. Returned
20039 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20041 struct dwarf2_locexpr_baton
20042 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
20043 struct dwarf2_per_cu_data
*per_cu
,
20044 CORE_ADDR (*get_frame_pc
) (void *baton
),
20047 struct dwarf2_cu
*cu
;
20048 struct die_info
*die
;
20049 struct attribute
*attr
;
20050 struct dwarf2_locexpr_baton retval
;
20052 dw2_setup (per_cu
->objfile
);
20054 if (per_cu
->cu
== NULL
)
20059 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20060 Instead just throw an error, not much else we can do. */
20061 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20062 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20065 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20067 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20068 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20070 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20073 /* DWARF: "If there is no such attribute, then there is no effect.".
20074 DATA is ignored if SIZE is 0. */
20076 retval
.data
= NULL
;
20079 else if (attr_form_is_section_offset (attr
))
20081 struct dwarf2_loclist_baton loclist_baton
;
20082 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20085 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20087 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20089 retval
.size
= size
;
20093 if (!attr_form_is_block (attr
))
20094 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20095 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20096 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20098 retval
.data
= DW_BLOCK (attr
)->data
;
20099 retval
.size
= DW_BLOCK (attr
)->size
;
20101 retval
.per_cu
= cu
->per_cu
;
20103 age_cached_comp_units ();
20108 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20111 struct dwarf2_locexpr_baton
20112 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20113 struct dwarf2_per_cu_data
*per_cu
,
20114 CORE_ADDR (*get_frame_pc
) (void *baton
),
20117 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
20119 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
20122 /* Write a constant of a given type as target-ordered bytes into
20125 static const gdb_byte
*
20126 write_constant_as_bytes (struct obstack
*obstack
,
20127 enum bfd_endian byte_order
,
20134 *len
= TYPE_LENGTH (type
);
20135 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20136 store_unsigned_integer (result
, *len
, byte_order
, value
);
20141 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20142 pointer to the constant bytes and set LEN to the length of the
20143 data. If memory is needed, allocate it on OBSTACK. If the DIE
20144 does not have a DW_AT_const_value, return NULL. */
20147 dwarf2_fetch_constant_bytes (sect_offset offset
,
20148 struct dwarf2_per_cu_data
*per_cu
,
20149 struct obstack
*obstack
,
20152 struct dwarf2_cu
*cu
;
20153 struct die_info
*die
;
20154 struct attribute
*attr
;
20155 const gdb_byte
*result
= NULL
;
20158 enum bfd_endian byte_order
;
20160 dw2_setup (per_cu
->objfile
);
20162 if (per_cu
->cu
== NULL
)
20167 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20168 Instead just throw an error, not much else we can do. */
20169 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20170 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20173 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
20175 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20176 offset
.sect_off
, objfile_name (per_cu
->objfile
));
20179 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20183 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20184 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20186 switch (attr
->form
)
20189 case DW_FORM_GNU_addr_index
:
20193 *len
= cu
->header
.addr_size
;
20194 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20195 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20199 case DW_FORM_string
:
20201 case DW_FORM_GNU_str_index
:
20202 case DW_FORM_GNU_strp_alt
:
20203 /* DW_STRING is already allocated on the objfile obstack, point
20205 result
= (const gdb_byte
*) DW_STRING (attr
);
20206 *len
= strlen (DW_STRING (attr
));
20208 case DW_FORM_block1
:
20209 case DW_FORM_block2
:
20210 case DW_FORM_block4
:
20211 case DW_FORM_block
:
20212 case DW_FORM_exprloc
:
20213 result
= DW_BLOCK (attr
)->data
;
20214 *len
= DW_BLOCK (attr
)->size
;
20217 /* The DW_AT_const_value attributes are supposed to carry the
20218 symbol's value "represented as it would be on the target
20219 architecture." By the time we get here, it's already been
20220 converted to host endianness, so we just need to sign- or
20221 zero-extend it as appropriate. */
20222 case DW_FORM_data1
:
20223 type
= die_type (die
, cu
);
20224 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20225 if (result
== NULL
)
20226 result
= write_constant_as_bytes (obstack
, byte_order
,
20229 case DW_FORM_data2
:
20230 type
= die_type (die
, cu
);
20231 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20232 if (result
== NULL
)
20233 result
= write_constant_as_bytes (obstack
, byte_order
,
20236 case DW_FORM_data4
:
20237 type
= die_type (die
, cu
);
20238 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20239 if (result
== NULL
)
20240 result
= write_constant_as_bytes (obstack
, byte_order
,
20243 case DW_FORM_data8
:
20244 type
= die_type (die
, cu
);
20245 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20246 if (result
== NULL
)
20247 result
= write_constant_as_bytes (obstack
, byte_order
,
20251 case DW_FORM_sdata
:
20252 type
= die_type (die
, cu
);
20253 result
= write_constant_as_bytes (obstack
, byte_order
,
20254 type
, DW_SND (attr
), len
);
20257 case DW_FORM_udata
:
20258 type
= die_type (die
, cu
);
20259 result
= write_constant_as_bytes (obstack
, byte_order
,
20260 type
, DW_UNSND (attr
), len
);
20264 complaint (&symfile_complaints
,
20265 _("unsupported const value attribute form: '%s'"),
20266 dwarf_form_name (attr
->form
));
20273 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20277 dwarf2_get_die_type (cu_offset die_offset
,
20278 struct dwarf2_per_cu_data
*per_cu
)
20280 sect_offset die_offset_sect
;
20282 dw2_setup (per_cu
->objfile
);
20284 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20285 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20288 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20289 On entry *REF_CU is the CU of SRC_DIE.
20290 On exit *REF_CU is the CU of the result.
20291 Returns NULL if the referenced DIE isn't found. */
20293 static struct die_info
*
20294 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20295 struct dwarf2_cu
**ref_cu
)
20297 struct objfile
*objfile
= (*ref_cu
)->objfile
;
20298 struct die_info temp_die
;
20299 struct dwarf2_cu
*sig_cu
;
20300 struct die_info
*die
;
20302 /* While it might be nice to assert sig_type->type == NULL here,
20303 we can get here for DW_AT_imported_declaration where we need
20304 the DIE not the type. */
20306 /* If necessary, add it to the queue and load its DIEs. */
20308 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20309 read_signatured_type (sig_type
);
20311 sig_cu
= sig_type
->per_cu
.cu
;
20312 gdb_assert (sig_cu
!= NULL
);
20313 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20314 temp_die
.offset
= sig_type
->type_offset_in_section
;
20315 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20316 temp_die
.offset
.sect_off
);
20319 /* For .gdb_index version 7 keep track of included TUs.
20320 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20321 if (dwarf2_per_objfile
->index_table
!= NULL
20322 && dwarf2_per_objfile
->index_table
->version
<= 7)
20324 VEC_safe_push (dwarf2_per_cu_ptr
,
20325 (*ref_cu
)->per_cu
->imported_symtabs
,
20336 /* Follow signatured type referenced by ATTR in SRC_DIE.
20337 On entry *REF_CU is the CU of SRC_DIE.
20338 On exit *REF_CU is the CU of the result.
20339 The result is the DIE of the type.
20340 If the referenced type cannot be found an error is thrown. */
20342 static struct die_info
*
20343 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20344 struct dwarf2_cu
**ref_cu
)
20346 ULONGEST signature
= DW_SIGNATURE (attr
);
20347 struct signatured_type
*sig_type
;
20348 struct die_info
*die
;
20350 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20352 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20353 /* sig_type will be NULL if the signatured type is missing from
20355 if (sig_type
== NULL
)
20357 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20358 " from DIE at 0x%x [in module %s]"),
20359 hex_string (signature
), src_die
->offset
.sect_off
,
20360 objfile_name ((*ref_cu
)->objfile
));
20363 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20366 dump_die_for_error (src_die
);
20367 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20368 " from DIE at 0x%x [in module %s]"),
20369 hex_string (signature
), src_die
->offset
.sect_off
,
20370 objfile_name ((*ref_cu
)->objfile
));
20376 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20377 reading in and processing the type unit if necessary. */
20379 static struct type
*
20380 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20381 struct dwarf2_cu
*cu
)
20383 struct signatured_type
*sig_type
;
20384 struct dwarf2_cu
*type_cu
;
20385 struct die_info
*type_die
;
20388 sig_type
= lookup_signatured_type (cu
, signature
);
20389 /* sig_type will be NULL if the signatured type is missing from
20391 if (sig_type
== NULL
)
20393 complaint (&symfile_complaints
,
20394 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20395 " from DIE at 0x%x [in module %s]"),
20396 hex_string (signature
), die
->offset
.sect_off
,
20397 objfile_name (dwarf2_per_objfile
->objfile
));
20398 return build_error_marker_type (cu
, die
);
20401 /* If we already know the type we're done. */
20402 if (sig_type
->type
!= NULL
)
20403 return sig_type
->type
;
20406 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20407 if (type_die
!= NULL
)
20409 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20410 is created. This is important, for example, because for c++ classes
20411 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20412 type
= read_type_die (type_die
, type_cu
);
20415 complaint (&symfile_complaints
,
20416 _("Dwarf Error: Cannot build signatured type %s"
20417 " referenced from DIE at 0x%x [in module %s]"),
20418 hex_string (signature
), die
->offset
.sect_off
,
20419 objfile_name (dwarf2_per_objfile
->objfile
));
20420 type
= build_error_marker_type (cu
, die
);
20425 complaint (&symfile_complaints
,
20426 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20427 " from DIE at 0x%x [in module %s]"),
20428 hex_string (signature
), die
->offset
.sect_off
,
20429 objfile_name (dwarf2_per_objfile
->objfile
));
20430 type
= build_error_marker_type (cu
, die
);
20432 sig_type
->type
= type
;
20437 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20438 reading in and processing the type unit if necessary. */
20440 static struct type
*
20441 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20442 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20444 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20445 if (attr_form_is_ref (attr
))
20447 struct dwarf2_cu
*type_cu
= cu
;
20448 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20450 return read_type_die (type_die
, type_cu
);
20452 else if (attr
->form
== DW_FORM_ref_sig8
)
20454 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20458 complaint (&symfile_complaints
,
20459 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20460 " at 0x%x [in module %s]"),
20461 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20462 objfile_name (dwarf2_per_objfile
->objfile
));
20463 return build_error_marker_type (cu
, die
);
20467 /* Load the DIEs associated with type unit PER_CU into memory. */
20470 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20472 struct signatured_type
*sig_type
;
20474 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20475 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20477 /* We have the per_cu, but we need the signatured_type.
20478 Fortunately this is an easy translation. */
20479 gdb_assert (per_cu
->is_debug_types
);
20480 sig_type
= (struct signatured_type
*) per_cu
;
20482 gdb_assert (per_cu
->cu
== NULL
);
20484 read_signatured_type (sig_type
);
20486 gdb_assert (per_cu
->cu
!= NULL
);
20489 /* die_reader_func for read_signatured_type.
20490 This is identical to load_full_comp_unit_reader,
20491 but is kept separate for now. */
20494 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20495 const gdb_byte
*info_ptr
,
20496 struct die_info
*comp_unit_die
,
20500 struct dwarf2_cu
*cu
= reader
->cu
;
20502 gdb_assert (cu
->die_hash
== NULL
);
20504 htab_create_alloc_ex (cu
->header
.length
/ 12,
20508 &cu
->comp_unit_obstack
,
20509 hashtab_obstack_allocate
,
20510 dummy_obstack_deallocate
);
20513 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20514 &info_ptr
, comp_unit_die
);
20515 cu
->dies
= comp_unit_die
;
20516 /* comp_unit_die is not stored in die_hash, no need. */
20518 /* We try not to read any attributes in this function, because not
20519 all CUs needed for references have been loaded yet, and symbol
20520 table processing isn't initialized. But we have to set the CU language,
20521 or we won't be able to build types correctly.
20522 Similarly, if we do not read the producer, we can not apply
20523 producer-specific interpretation. */
20524 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20527 /* Read in a signatured type and build its CU and DIEs.
20528 If the type is a stub for the real type in a DWO file,
20529 read in the real type from the DWO file as well. */
20532 read_signatured_type (struct signatured_type
*sig_type
)
20534 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20536 gdb_assert (per_cu
->is_debug_types
);
20537 gdb_assert (per_cu
->cu
== NULL
);
20539 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20540 read_signatured_type_reader
, NULL
);
20541 sig_type
->per_cu
.tu_read
= 1;
20544 /* Decode simple location descriptions.
20545 Given a pointer to a dwarf block that defines a location, compute
20546 the location and return the value.
20548 NOTE drow/2003-11-18: This function is called in two situations
20549 now: for the address of static or global variables (partial symbols
20550 only) and for offsets into structures which are expected to be
20551 (more or less) constant. The partial symbol case should go away,
20552 and only the constant case should remain. That will let this
20553 function complain more accurately. A few special modes are allowed
20554 without complaint for global variables (for instance, global
20555 register values and thread-local values).
20557 A location description containing no operations indicates that the
20558 object is optimized out. The return value is 0 for that case.
20559 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20560 callers will only want a very basic result and this can become a
20563 Note that stack[0] is unused except as a default error return. */
20566 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20568 struct objfile
*objfile
= cu
->objfile
;
20570 size_t size
= blk
->size
;
20571 const gdb_byte
*data
= blk
->data
;
20572 CORE_ADDR stack
[64];
20574 unsigned int bytes_read
, unsnd
;
20580 stack
[++stacki
] = 0;
20619 stack
[++stacki
] = op
- DW_OP_lit0
;
20654 stack
[++stacki
] = op
- DW_OP_reg0
;
20656 dwarf2_complex_location_expr_complaint ();
20660 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20662 stack
[++stacki
] = unsnd
;
20664 dwarf2_complex_location_expr_complaint ();
20668 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20673 case DW_OP_const1u
:
20674 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20678 case DW_OP_const1s
:
20679 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20683 case DW_OP_const2u
:
20684 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20688 case DW_OP_const2s
:
20689 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20693 case DW_OP_const4u
:
20694 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20698 case DW_OP_const4s
:
20699 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20703 case DW_OP_const8u
:
20704 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20709 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20715 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20720 stack
[stacki
+ 1] = stack
[stacki
];
20725 stack
[stacki
- 1] += stack
[stacki
];
20729 case DW_OP_plus_uconst
:
20730 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20736 stack
[stacki
- 1] -= stack
[stacki
];
20741 /* If we're not the last op, then we definitely can't encode
20742 this using GDB's address_class enum. This is valid for partial
20743 global symbols, although the variable's address will be bogus
20746 dwarf2_complex_location_expr_complaint ();
20749 case DW_OP_GNU_push_tls_address
:
20750 /* The top of the stack has the offset from the beginning
20751 of the thread control block at which the variable is located. */
20752 /* Nothing should follow this operator, so the top of stack would
20754 /* This is valid for partial global symbols, but the variable's
20755 address will be bogus in the psymtab. Make it always at least
20756 non-zero to not look as a variable garbage collected by linker
20757 which have DW_OP_addr 0. */
20759 dwarf2_complex_location_expr_complaint ();
20763 case DW_OP_GNU_uninit
:
20766 case DW_OP_GNU_addr_index
:
20767 case DW_OP_GNU_const_index
:
20768 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20775 const char *name
= get_DW_OP_name (op
);
20778 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20781 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20785 return (stack
[stacki
]);
20788 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20789 outside of the allocated space. Also enforce minimum>0. */
20790 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20792 complaint (&symfile_complaints
,
20793 _("location description stack overflow"));
20799 complaint (&symfile_complaints
,
20800 _("location description stack underflow"));
20804 return (stack
[stacki
]);
20807 /* memory allocation interface */
20809 static struct dwarf_block
*
20810 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20812 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
20815 static struct die_info
*
20816 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20818 struct die_info
*die
;
20819 size_t size
= sizeof (struct die_info
);
20822 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20824 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20825 memset (die
, 0, sizeof (struct die_info
));
20830 /* Macro support. */
20832 /* Return file name relative to the compilation directory of file number I in
20833 *LH's file name table. The result is allocated using xmalloc; the caller is
20834 responsible for freeing it. */
20837 file_file_name (int file
, struct line_header
*lh
)
20839 /* Is the file number a valid index into the line header's file name
20840 table? Remember that file numbers start with one, not zero. */
20841 if (1 <= file
&& file
<= lh
->num_file_names
)
20843 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20845 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0
20846 || lh
->include_dirs
== NULL
)
20847 return xstrdup (fe
->name
);
20848 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20853 /* The compiler produced a bogus file number. We can at least
20854 record the macro definitions made in the file, even if we
20855 won't be able to find the file by name. */
20856 char fake_name
[80];
20858 xsnprintf (fake_name
, sizeof (fake_name
),
20859 "<bad macro file number %d>", file
);
20861 complaint (&symfile_complaints
,
20862 _("bad file number in macro information (%d)"),
20865 return xstrdup (fake_name
);
20869 /* Return the full name of file number I in *LH's file name table.
20870 Use COMP_DIR as the name of the current directory of the
20871 compilation. The result is allocated using xmalloc; the caller is
20872 responsible for freeing it. */
20874 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20876 /* Is the file number a valid index into the line header's file name
20877 table? Remember that file numbers start with one, not zero. */
20878 if (1 <= file
&& file
<= lh
->num_file_names
)
20880 char *relative
= file_file_name (file
, lh
);
20882 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20884 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20887 return file_file_name (file
, lh
);
20891 static struct macro_source_file
*
20892 macro_start_file (int file
, int line
,
20893 struct macro_source_file
*current_file
,
20894 struct line_header
*lh
)
20896 /* File name relative to the compilation directory of this source file. */
20897 char *file_name
= file_file_name (file
, lh
);
20899 if (! current_file
)
20901 /* Note: We don't create a macro table for this compilation unit
20902 at all until we actually get a filename. */
20903 struct macro_table
*macro_table
= get_macro_table ();
20905 /* If we have no current file, then this must be the start_file
20906 directive for the compilation unit's main source file. */
20907 current_file
= macro_set_main (macro_table
, file_name
);
20908 macro_define_special (macro_table
);
20911 current_file
= macro_include (current_file
, line
, file_name
);
20915 return current_file
;
20919 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20920 followed by a null byte. */
20922 copy_string (const char *buf
, int len
)
20924 char *s
= (char *) xmalloc (len
+ 1);
20926 memcpy (s
, buf
, len
);
20932 static const char *
20933 consume_improper_spaces (const char *p
, const char *body
)
20937 complaint (&symfile_complaints
,
20938 _("macro definition contains spaces "
20939 "in formal argument list:\n`%s'"),
20951 parse_macro_definition (struct macro_source_file
*file
, int line
,
20956 /* The body string takes one of two forms. For object-like macro
20957 definitions, it should be:
20959 <macro name> " " <definition>
20961 For function-like macro definitions, it should be:
20963 <macro name> "() " <definition>
20965 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20967 Spaces may appear only where explicitly indicated, and in the
20970 The Dwarf 2 spec says that an object-like macro's name is always
20971 followed by a space, but versions of GCC around March 2002 omit
20972 the space when the macro's definition is the empty string.
20974 The Dwarf 2 spec says that there should be no spaces between the
20975 formal arguments in a function-like macro's formal argument list,
20976 but versions of GCC around March 2002 include spaces after the
20980 /* Find the extent of the macro name. The macro name is terminated
20981 by either a space or null character (for an object-like macro) or
20982 an opening paren (for a function-like macro). */
20983 for (p
= body
; *p
; p
++)
20984 if (*p
== ' ' || *p
== '(')
20987 if (*p
== ' ' || *p
== '\0')
20989 /* It's an object-like macro. */
20990 int name_len
= p
- body
;
20991 char *name
= copy_string (body
, name_len
);
20992 const char *replacement
;
20995 replacement
= body
+ name_len
+ 1;
20998 dwarf2_macro_malformed_definition_complaint (body
);
20999 replacement
= body
+ name_len
;
21002 macro_define_object (file
, line
, name
, replacement
);
21006 else if (*p
== '(')
21008 /* It's a function-like macro. */
21009 char *name
= copy_string (body
, p
- body
);
21012 char **argv
= XNEWVEC (char *, argv_size
);
21016 p
= consume_improper_spaces (p
, body
);
21018 /* Parse the formal argument list. */
21019 while (*p
&& *p
!= ')')
21021 /* Find the extent of the current argument name. */
21022 const char *arg_start
= p
;
21024 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21027 if (! *p
|| p
== arg_start
)
21028 dwarf2_macro_malformed_definition_complaint (body
);
21031 /* Make sure argv has room for the new argument. */
21032 if (argc
>= argv_size
)
21035 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21038 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21041 p
= consume_improper_spaces (p
, body
);
21043 /* Consume the comma, if present. */
21048 p
= consume_improper_spaces (p
, body
);
21057 /* Perfectly formed definition, no complaints. */
21058 macro_define_function (file
, line
, name
,
21059 argc
, (const char **) argv
,
21061 else if (*p
== '\0')
21063 /* Complain, but do define it. */
21064 dwarf2_macro_malformed_definition_complaint (body
);
21065 macro_define_function (file
, line
, name
,
21066 argc
, (const char **) argv
,
21070 /* Just complain. */
21071 dwarf2_macro_malformed_definition_complaint (body
);
21074 /* Just complain. */
21075 dwarf2_macro_malformed_definition_complaint (body
);
21081 for (i
= 0; i
< argc
; i
++)
21087 dwarf2_macro_malformed_definition_complaint (body
);
21090 /* Skip some bytes from BYTES according to the form given in FORM.
21091 Returns the new pointer. */
21093 static const gdb_byte
*
21094 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21095 enum dwarf_form form
,
21096 unsigned int offset_size
,
21097 struct dwarf2_section_info
*section
)
21099 unsigned int bytes_read
;
21103 case DW_FORM_data1
:
21108 case DW_FORM_data2
:
21112 case DW_FORM_data4
:
21116 case DW_FORM_data8
:
21120 case DW_FORM_string
:
21121 read_direct_string (abfd
, bytes
, &bytes_read
);
21122 bytes
+= bytes_read
;
21125 case DW_FORM_sec_offset
:
21127 case DW_FORM_GNU_strp_alt
:
21128 bytes
+= offset_size
;
21131 case DW_FORM_block
:
21132 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21133 bytes
+= bytes_read
;
21136 case DW_FORM_block1
:
21137 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21139 case DW_FORM_block2
:
21140 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21142 case DW_FORM_block4
:
21143 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21146 case DW_FORM_sdata
:
21147 case DW_FORM_udata
:
21148 case DW_FORM_GNU_addr_index
:
21149 case DW_FORM_GNU_str_index
:
21150 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21153 dwarf2_section_buffer_overflow_complaint (section
);
21161 complaint (&symfile_complaints
,
21162 _("invalid form 0x%x in `%s'"),
21163 form
, get_section_name (section
));
21171 /* A helper for dwarf_decode_macros that handles skipping an unknown
21172 opcode. Returns an updated pointer to the macro data buffer; or,
21173 on error, issues a complaint and returns NULL. */
21175 static const gdb_byte
*
21176 skip_unknown_opcode (unsigned int opcode
,
21177 const gdb_byte
**opcode_definitions
,
21178 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21180 unsigned int offset_size
,
21181 struct dwarf2_section_info
*section
)
21183 unsigned int bytes_read
, i
;
21185 const gdb_byte
*defn
;
21187 if (opcode_definitions
[opcode
] == NULL
)
21189 complaint (&symfile_complaints
,
21190 _("unrecognized DW_MACFINO opcode 0x%x"),
21195 defn
= opcode_definitions
[opcode
];
21196 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21197 defn
+= bytes_read
;
21199 for (i
= 0; i
< arg
; ++i
)
21201 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21202 (enum dwarf_form
) defn
[i
], offset_size
,
21204 if (mac_ptr
== NULL
)
21206 /* skip_form_bytes already issued the complaint. */
21214 /* A helper function which parses the header of a macro section.
21215 If the macro section is the extended (for now called "GNU") type,
21216 then this updates *OFFSET_SIZE. Returns a pointer to just after
21217 the header, or issues a complaint and returns NULL on error. */
21219 static const gdb_byte
*
21220 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
21222 const gdb_byte
*mac_ptr
,
21223 unsigned int *offset_size
,
21224 int section_is_gnu
)
21226 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
21228 if (section_is_gnu
)
21230 unsigned int version
, flags
;
21232 version
= read_2_bytes (abfd
, mac_ptr
);
21235 complaint (&symfile_complaints
,
21236 _("unrecognized version `%d' in .debug_macro section"),
21242 flags
= read_1_byte (abfd
, mac_ptr
);
21244 *offset_size
= (flags
& 1) ? 8 : 4;
21246 if ((flags
& 2) != 0)
21247 /* We don't need the line table offset. */
21248 mac_ptr
+= *offset_size
;
21250 /* Vendor opcode descriptions. */
21251 if ((flags
& 4) != 0)
21253 unsigned int i
, count
;
21255 count
= read_1_byte (abfd
, mac_ptr
);
21257 for (i
= 0; i
< count
; ++i
)
21259 unsigned int opcode
, bytes_read
;
21262 opcode
= read_1_byte (abfd
, mac_ptr
);
21264 opcode_definitions
[opcode
] = mac_ptr
;
21265 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21266 mac_ptr
+= bytes_read
;
21275 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21276 including DW_MACRO_GNU_transparent_include. */
21279 dwarf_decode_macro_bytes (bfd
*abfd
,
21280 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21281 struct macro_source_file
*current_file
,
21282 struct line_header
*lh
,
21283 struct dwarf2_section_info
*section
,
21284 int section_is_gnu
, int section_is_dwz
,
21285 unsigned int offset_size
,
21286 htab_t include_hash
)
21288 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21289 enum dwarf_macro_record_type macinfo_type
;
21290 int at_commandline
;
21291 const gdb_byte
*opcode_definitions
[256];
21293 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21294 &offset_size
, section_is_gnu
);
21295 if (mac_ptr
== NULL
)
21297 /* We already issued a complaint. */
21301 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21302 GDB is still reading the definitions from command line. First
21303 DW_MACINFO_start_file will need to be ignored as it was already executed
21304 to create CURRENT_FILE for the main source holding also the command line
21305 definitions. On first met DW_MACINFO_start_file this flag is reset to
21306 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21308 at_commandline
= 1;
21312 /* Do we at least have room for a macinfo type byte? */
21313 if (mac_ptr
>= mac_end
)
21315 dwarf2_section_buffer_overflow_complaint (section
);
21319 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21322 /* Note that we rely on the fact that the corresponding GNU and
21323 DWARF constants are the same. */
21324 switch (macinfo_type
)
21326 /* A zero macinfo type indicates the end of the macro
21331 case DW_MACRO_GNU_define
:
21332 case DW_MACRO_GNU_undef
:
21333 case DW_MACRO_GNU_define_indirect
:
21334 case DW_MACRO_GNU_undef_indirect
:
21335 case DW_MACRO_GNU_define_indirect_alt
:
21336 case DW_MACRO_GNU_undef_indirect_alt
:
21338 unsigned int bytes_read
;
21343 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21344 mac_ptr
+= bytes_read
;
21346 if (macinfo_type
== DW_MACRO_GNU_define
21347 || macinfo_type
== DW_MACRO_GNU_undef
)
21349 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21350 mac_ptr
+= bytes_read
;
21354 LONGEST str_offset
;
21356 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21357 mac_ptr
+= offset_size
;
21359 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21360 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21363 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21365 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21368 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21371 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21372 || macinfo_type
== DW_MACRO_GNU_define_indirect
21373 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21374 if (! current_file
)
21376 /* DWARF violation as no main source is present. */
21377 complaint (&symfile_complaints
,
21378 _("debug info with no main source gives macro %s "
21380 is_define
? _("definition") : _("undefinition"),
21384 if ((line
== 0 && !at_commandline
)
21385 || (line
!= 0 && at_commandline
))
21386 complaint (&symfile_complaints
,
21387 _("debug info gives %s macro %s with %s line %d: %s"),
21388 at_commandline
? _("command-line") : _("in-file"),
21389 is_define
? _("definition") : _("undefinition"),
21390 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21393 parse_macro_definition (current_file
, line
, body
);
21396 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21397 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21398 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21399 macro_undef (current_file
, line
, body
);
21404 case DW_MACRO_GNU_start_file
:
21406 unsigned int bytes_read
;
21409 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21410 mac_ptr
+= bytes_read
;
21411 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21412 mac_ptr
+= bytes_read
;
21414 if ((line
== 0 && !at_commandline
)
21415 || (line
!= 0 && at_commandline
))
21416 complaint (&symfile_complaints
,
21417 _("debug info gives source %d included "
21418 "from %s at %s line %d"),
21419 file
, at_commandline
? _("command-line") : _("file"),
21420 line
== 0 ? _("zero") : _("non-zero"), line
);
21422 if (at_commandline
)
21424 /* This DW_MACRO_GNU_start_file was executed in the
21426 at_commandline
= 0;
21429 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21433 case DW_MACRO_GNU_end_file
:
21434 if (! current_file
)
21435 complaint (&symfile_complaints
,
21436 _("macro debug info has an unmatched "
21437 "`close_file' directive"));
21440 current_file
= current_file
->included_by
;
21441 if (! current_file
)
21443 enum dwarf_macro_record_type next_type
;
21445 /* GCC circa March 2002 doesn't produce the zero
21446 type byte marking the end of the compilation
21447 unit. Complain if it's not there, but exit no
21450 /* Do we at least have room for a macinfo type byte? */
21451 if (mac_ptr
>= mac_end
)
21453 dwarf2_section_buffer_overflow_complaint (section
);
21457 /* We don't increment mac_ptr here, so this is just
21460 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
21462 if (next_type
!= 0)
21463 complaint (&symfile_complaints
,
21464 _("no terminating 0-type entry for "
21465 "macros in `.debug_macinfo' section"));
21472 case DW_MACRO_GNU_transparent_include
:
21473 case DW_MACRO_GNU_transparent_include_alt
:
21477 bfd
*include_bfd
= abfd
;
21478 struct dwarf2_section_info
*include_section
= section
;
21479 struct dwarf2_section_info alt_section
;
21480 const gdb_byte
*include_mac_end
= mac_end
;
21481 int is_dwz
= section_is_dwz
;
21482 const gdb_byte
*new_mac_ptr
;
21484 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21485 mac_ptr
+= offset_size
;
21487 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21489 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21491 dwarf2_read_section (objfile
, &dwz
->macro
);
21493 include_section
= &dwz
->macro
;
21494 include_bfd
= get_section_bfd_owner (include_section
);
21495 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21499 new_mac_ptr
= include_section
->buffer
+ offset
;
21500 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21504 /* This has actually happened; see
21505 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21506 complaint (&symfile_complaints
,
21507 _("recursive DW_MACRO_GNU_transparent_include in "
21508 ".debug_macro section"));
21512 *slot
= (void *) new_mac_ptr
;
21514 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21515 include_mac_end
, current_file
, lh
,
21516 section
, section_is_gnu
, is_dwz
,
21517 offset_size
, include_hash
);
21519 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21524 case DW_MACINFO_vendor_ext
:
21525 if (!section_is_gnu
)
21527 unsigned int bytes_read
;
21530 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21531 mac_ptr
+= bytes_read
;
21532 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21533 mac_ptr
+= bytes_read
;
21535 /* We don't recognize any vendor extensions. */
21541 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21542 mac_ptr
, mac_end
, abfd
, offset_size
,
21544 if (mac_ptr
== NULL
)
21548 } while (macinfo_type
!= 0);
21552 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21553 int section_is_gnu
)
21555 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21556 struct line_header
*lh
= cu
->line_header
;
21558 const gdb_byte
*mac_ptr
, *mac_end
;
21559 struct macro_source_file
*current_file
= 0;
21560 enum dwarf_macro_record_type macinfo_type
;
21561 unsigned int offset_size
= cu
->header
.offset_size
;
21562 const gdb_byte
*opcode_definitions
[256];
21563 struct cleanup
*cleanup
;
21564 htab_t include_hash
;
21566 struct dwarf2_section_info
*section
;
21567 const char *section_name
;
21569 if (cu
->dwo_unit
!= NULL
)
21571 if (section_is_gnu
)
21573 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21574 section_name
= ".debug_macro.dwo";
21578 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21579 section_name
= ".debug_macinfo.dwo";
21584 if (section_is_gnu
)
21586 section
= &dwarf2_per_objfile
->macro
;
21587 section_name
= ".debug_macro";
21591 section
= &dwarf2_per_objfile
->macinfo
;
21592 section_name
= ".debug_macinfo";
21596 dwarf2_read_section (objfile
, section
);
21597 if (section
->buffer
== NULL
)
21599 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21602 abfd
= get_section_bfd_owner (section
);
21604 /* First pass: Find the name of the base filename.
21605 This filename is needed in order to process all macros whose definition
21606 (or undefinition) comes from the command line. These macros are defined
21607 before the first DW_MACINFO_start_file entry, and yet still need to be
21608 associated to the base file.
21610 To determine the base file name, we scan the macro definitions until we
21611 reach the first DW_MACINFO_start_file entry. We then initialize
21612 CURRENT_FILE accordingly so that any macro definition found before the
21613 first DW_MACINFO_start_file can still be associated to the base file. */
21615 mac_ptr
= section
->buffer
+ offset
;
21616 mac_end
= section
->buffer
+ section
->size
;
21618 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21619 &offset_size
, section_is_gnu
);
21620 if (mac_ptr
== NULL
)
21622 /* We already issued a complaint. */
21628 /* Do we at least have room for a macinfo type byte? */
21629 if (mac_ptr
>= mac_end
)
21631 /* Complaint is printed during the second pass as GDB will probably
21632 stop the first pass earlier upon finding
21633 DW_MACINFO_start_file. */
21637 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
21640 /* Note that we rely on the fact that the corresponding GNU and
21641 DWARF constants are the same. */
21642 switch (macinfo_type
)
21644 /* A zero macinfo type indicates the end of the macro
21649 case DW_MACRO_GNU_define
:
21650 case DW_MACRO_GNU_undef
:
21651 /* Only skip the data by MAC_PTR. */
21653 unsigned int bytes_read
;
21655 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21656 mac_ptr
+= bytes_read
;
21657 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21658 mac_ptr
+= bytes_read
;
21662 case DW_MACRO_GNU_start_file
:
21664 unsigned int bytes_read
;
21667 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21668 mac_ptr
+= bytes_read
;
21669 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21670 mac_ptr
+= bytes_read
;
21672 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21676 case DW_MACRO_GNU_end_file
:
21677 /* No data to skip by MAC_PTR. */
21680 case DW_MACRO_GNU_define_indirect
:
21681 case DW_MACRO_GNU_undef_indirect
:
21682 case DW_MACRO_GNU_define_indirect_alt
:
21683 case DW_MACRO_GNU_undef_indirect_alt
:
21685 unsigned int bytes_read
;
21687 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21688 mac_ptr
+= bytes_read
;
21689 mac_ptr
+= offset_size
;
21693 case DW_MACRO_GNU_transparent_include
:
21694 case DW_MACRO_GNU_transparent_include_alt
:
21695 /* Note that, according to the spec, a transparent include
21696 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21697 skip this opcode. */
21698 mac_ptr
+= offset_size
;
21701 case DW_MACINFO_vendor_ext
:
21702 /* Only skip the data by MAC_PTR. */
21703 if (!section_is_gnu
)
21705 unsigned int bytes_read
;
21707 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21708 mac_ptr
+= bytes_read
;
21709 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21710 mac_ptr
+= bytes_read
;
21715 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21716 mac_ptr
, mac_end
, abfd
, offset_size
,
21718 if (mac_ptr
== NULL
)
21722 } while (macinfo_type
!= 0 && current_file
== NULL
);
21724 /* Second pass: Process all entries.
21726 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21727 command-line macro definitions/undefinitions. This flag is unset when we
21728 reach the first DW_MACINFO_start_file entry. */
21730 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21731 NULL
, xcalloc
, xfree
);
21732 cleanup
= make_cleanup_htab_delete (include_hash
);
21733 mac_ptr
= section
->buffer
+ offset
;
21734 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21735 *slot
= (void *) mac_ptr
;
21736 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21737 current_file
, lh
, section
,
21738 section_is_gnu
, 0, offset_size
, include_hash
);
21739 do_cleanups (cleanup
);
21742 /* Check if the attribute's form is a DW_FORM_block*
21743 if so return true else false. */
21746 attr_form_is_block (const struct attribute
*attr
)
21748 return (attr
== NULL
? 0 :
21749 attr
->form
== DW_FORM_block1
21750 || attr
->form
== DW_FORM_block2
21751 || attr
->form
== DW_FORM_block4
21752 || attr
->form
== DW_FORM_block
21753 || attr
->form
== DW_FORM_exprloc
);
21756 /* Return non-zero if ATTR's value is a section offset --- classes
21757 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21758 You may use DW_UNSND (attr) to retrieve such offsets.
21760 Section 7.5.4, "Attribute Encodings", explains that no attribute
21761 may have a value that belongs to more than one of these classes; it
21762 would be ambiguous if we did, because we use the same forms for all
21766 attr_form_is_section_offset (const struct attribute
*attr
)
21768 return (attr
->form
== DW_FORM_data4
21769 || attr
->form
== DW_FORM_data8
21770 || attr
->form
== DW_FORM_sec_offset
);
21773 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21774 zero otherwise. When this function returns true, you can apply
21775 dwarf2_get_attr_constant_value to it.
21777 However, note that for some attributes you must check
21778 attr_form_is_section_offset before using this test. DW_FORM_data4
21779 and DW_FORM_data8 are members of both the constant class, and of
21780 the classes that contain offsets into other debug sections
21781 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21782 that, if an attribute's can be either a constant or one of the
21783 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21784 taken as section offsets, not constants. */
21787 attr_form_is_constant (const struct attribute
*attr
)
21789 switch (attr
->form
)
21791 case DW_FORM_sdata
:
21792 case DW_FORM_udata
:
21793 case DW_FORM_data1
:
21794 case DW_FORM_data2
:
21795 case DW_FORM_data4
:
21796 case DW_FORM_data8
:
21804 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21805 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21808 attr_form_is_ref (const struct attribute
*attr
)
21810 switch (attr
->form
)
21812 case DW_FORM_ref_addr
:
21817 case DW_FORM_ref_udata
:
21818 case DW_FORM_GNU_ref_alt
:
21825 /* Return the .debug_loc section to use for CU.
21826 For DWO files use .debug_loc.dwo. */
21828 static struct dwarf2_section_info
*
21829 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21832 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21833 return &dwarf2_per_objfile
->loc
;
21836 /* A helper function that fills in a dwarf2_loclist_baton. */
21839 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21840 struct dwarf2_loclist_baton
*baton
,
21841 const struct attribute
*attr
)
21843 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21845 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21847 baton
->per_cu
= cu
->per_cu
;
21848 gdb_assert (baton
->per_cu
);
21849 /* We don't know how long the location list is, but make sure we
21850 don't run off the edge of the section. */
21851 baton
->size
= section
->size
- DW_UNSND (attr
);
21852 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21853 baton
->base_address
= cu
->base_address
;
21854 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21858 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21859 struct dwarf2_cu
*cu
, int is_block
)
21861 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21862 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21864 if (attr_form_is_section_offset (attr
)
21865 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21866 the section. If so, fall through to the complaint in the
21868 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21870 struct dwarf2_loclist_baton
*baton
;
21872 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
21874 fill_in_loclist_baton (cu
, baton
, attr
);
21876 if (cu
->base_known
== 0)
21877 complaint (&symfile_complaints
,
21878 _("Location list used without "
21879 "specifying the CU base address."));
21881 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21882 ? dwarf2_loclist_block_index
21883 : dwarf2_loclist_index
);
21884 SYMBOL_LOCATION_BATON (sym
) = baton
;
21888 struct dwarf2_locexpr_baton
*baton
;
21890 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
21891 baton
->per_cu
= cu
->per_cu
;
21892 gdb_assert (baton
->per_cu
);
21894 if (attr_form_is_block (attr
))
21896 /* Note that we're just copying the block's data pointer
21897 here, not the actual data. We're still pointing into the
21898 info_buffer for SYM's objfile; right now we never release
21899 that buffer, but when we do clean up properly this may
21901 baton
->size
= DW_BLOCK (attr
)->size
;
21902 baton
->data
= DW_BLOCK (attr
)->data
;
21906 dwarf2_invalid_attrib_class_complaint ("location description",
21907 SYMBOL_NATURAL_NAME (sym
));
21911 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21912 ? dwarf2_locexpr_block_index
21913 : dwarf2_locexpr_index
);
21914 SYMBOL_LOCATION_BATON (sym
) = baton
;
21918 /* Return the OBJFILE associated with the compilation unit CU. If CU
21919 came from a separate debuginfo file, then the master objfile is
21923 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21925 struct objfile
*objfile
= per_cu
->objfile
;
21927 /* Return the master objfile, so that we can report and look up the
21928 correct file containing this variable. */
21929 if (objfile
->separate_debug_objfile_backlink
)
21930 objfile
= objfile
->separate_debug_objfile_backlink
;
21935 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21936 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21937 CU_HEADERP first. */
21939 static const struct comp_unit_head
*
21940 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21941 struct dwarf2_per_cu_data
*per_cu
)
21943 const gdb_byte
*info_ptr
;
21946 return &per_cu
->cu
->header
;
21948 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21950 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21951 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21956 /* Return the address size given in the compilation unit header for CU. */
21959 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21961 struct comp_unit_head cu_header_local
;
21962 const struct comp_unit_head
*cu_headerp
;
21964 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21966 return cu_headerp
->addr_size
;
21969 /* Return the offset size given in the compilation unit header for CU. */
21972 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21974 struct comp_unit_head cu_header_local
;
21975 const struct comp_unit_head
*cu_headerp
;
21977 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21979 return cu_headerp
->offset_size
;
21982 /* See its dwarf2loc.h declaration. */
21985 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21987 struct comp_unit_head cu_header_local
;
21988 const struct comp_unit_head
*cu_headerp
;
21990 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21992 if (cu_headerp
->version
== 2)
21993 return cu_headerp
->addr_size
;
21995 return cu_headerp
->offset_size
;
21998 /* Return the text offset of the CU. The returned offset comes from
21999 this CU's objfile. If this objfile came from a separate debuginfo
22000 file, then the offset may be different from the corresponding
22001 offset in the parent objfile. */
22004 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22006 struct objfile
*objfile
= per_cu
->objfile
;
22008 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22011 /* Locate the .debug_info compilation unit from CU's objfile which contains
22012 the DIE at OFFSET. Raises an error on failure. */
22014 static struct dwarf2_per_cu_data
*
22015 dwarf2_find_containing_comp_unit (sect_offset offset
,
22016 unsigned int offset_in_dwz
,
22017 struct objfile
*objfile
)
22019 struct dwarf2_per_cu_data
*this_cu
;
22021 const sect_offset
*cu_off
;
22024 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22027 struct dwarf2_per_cu_data
*mid_cu
;
22028 int mid
= low
+ (high
- low
) / 2;
22030 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22031 cu_off
= &mid_cu
->offset
;
22032 if (mid_cu
->is_dwz
> offset_in_dwz
22033 || (mid_cu
->is_dwz
== offset_in_dwz
22034 && cu_off
->sect_off
>= offset
.sect_off
))
22039 gdb_assert (low
== high
);
22040 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22041 cu_off
= &this_cu
->offset
;
22042 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
22044 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22045 error (_("Dwarf Error: could not find partial DIE containing "
22046 "offset 0x%lx [in module %s]"),
22047 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
22049 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
22050 <= offset
.sect_off
);
22051 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22055 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22056 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22057 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
22058 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
22059 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
22064 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22067 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22069 memset (cu
, 0, sizeof (*cu
));
22071 cu
->per_cu
= per_cu
;
22072 cu
->objfile
= per_cu
->objfile
;
22073 obstack_init (&cu
->comp_unit_obstack
);
22076 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22079 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22080 enum language pretend_language
)
22082 struct attribute
*attr
;
22084 /* Set the language we're debugging. */
22085 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22087 set_cu_language (DW_UNSND (attr
), cu
);
22090 cu
->language
= pretend_language
;
22091 cu
->language_defn
= language_def (cu
->language
);
22094 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22097 /* Release one cached compilation unit, CU. We unlink it from the tree
22098 of compilation units, but we don't remove it from the read_in_chain;
22099 the caller is responsible for that.
22100 NOTE: DATA is a void * because this function is also used as a
22101 cleanup routine. */
22104 free_heap_comp_unit (void *data
)
22106 struct dwarf2_cu
*cu
= data
;
22108 gdb_assert (cu
->per_cu
!= NULL
);
22109 cu
->per_cu
->cu
= NULL
;
22112 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22117 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22118 when we're finished with it. We can't free the pointer itself, but be
22119 sure to unlink it from the cache. Also release any associated storage. */
22122 free_stack_comp_unit (void *data
)
22124 struct dwarf2_cu
*cu
= data
;
22126 gdb_assert (cu
->per_cu
!= NULL
);
22127 cu
->per_cu
->cu
= NULL
;
22130 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22131 cu
->partial_dies
= NULL
;
22134 /* Free all cached compilation units. */
22137 free_cached_comp_units (void *data
)
22139 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22141 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22142 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22143 while (per_cu
!= NULL
)
22145 struct dwarf2_per_cu_data
*next_cu
;
22147 next_cu
= per_cu
->cu
->read_in_chain
;
22149 free_heap_comp_unit (per_cu
->cu
);
22150 *last_chain
= next_cu
;
22156 /* Increase the age counter on each cached compilation unit, and free
22157 any that are too old. */
22160 age_cached_comp_units (void)
22162 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22164 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22165 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22166 while (per_cu
!= NULL
)
22168 per_cu
->cu
->last_used
++;
22169 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22170 dwarf2_mark (per_cu
->cu
);
22171 per_cu
= per_cu
->cu
->read_in_chain
;
22174 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22175 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22176 while (per_cu
!= NULL
)
22178 struct dwarf2_per_cu_data
*next_cu
;
22180 next_cu
= per_cu
->cu
->read_in_chain
;
22182 if (!per_cu
->cu
->mark
)
22184 free_heap_comp_unit (per_cu
->cu
);
22185 *last_chain
= next_cu
;
22188 last_chain
= &per_cu
->cu
->read_in_chain
;
22194 /* Remove a single compilation unit from the cache. */
22197 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22199 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22201 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22202 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22203 while (per_cu
!= NULL
)
22205 struct dwarf2_per_cu_data
*next_cu
;
22207 next_cu
= per_cu
->cu
->read_in_chain
;
22209 if (per_cu
== target_per_cu
)
22211 free_heap_comp_unit (per_cu
->cu
);
22213 *last_chain
= next_cu
;
22217 last_chain
= &per_cu
->cu
->read_in_chain
;
22223 /* Release all extra memory associated with OBJFILE. */
22226 dwarf2_free_objfile (struct objfile
*objfile
)
22228 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
22230 if (dwarf2_per_objfile
== NULL
)
22233 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
22234 free_cached_comp_units (NULL
);
22236 if (dwarf2_per_objfile
->quick_file_names_table
)
22237 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
22239 if (dwarf2_per_objfile
->line_header_hash
)
22240 htab_delete (dwarf2_per_objfile
->line_header_hash
);
22242 /* Everything else should be on the objfile obstack. */
22245 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
22246 We store these in a hash table separate from the DIEs, and preserve them
22247 when the DIEs are flushed out of cache.
22249 The CU "per_cu" pointer is needed because offset alone is not enough to
22250 uniquely identify the type. A file may have multiple .debug_types sections,
22251 or the type may come from a DWO file. Furthermore, while it's more logical
22252 to use per_cu->section+offset, with Fission the section with the data is in
22253 the DWO file but we don't know that section at the point we need it.
22254 We have to use something in dwarf2_per_cu_data (or the pointer to it)
22255 because we can enter the lookup routine, get_die_type_at_offset, from
22256 outside this file, and thus won't necessarily have PER_CU->cu.
22257 Fortunately, PER_CU is stable for the life of the objfile. */
22259 struct dwarf2_per_cu_offset_and_type
22261 const struct dwarf2_per_cu_data
*per_cu
;
22262 sect_offset offset
;
22266 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22269 per_cu_offset_and_type_hash (const void *item
)
22271 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
22273 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22276 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22279 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22281 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
22282 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
22284 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22285 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22288 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22289 table if necessary. For convenience, return TYPE.
22291 The DIEs reading must have careful ordering to:
22292 * Not cause infite loops trying to read in DIEs as a prerequisite for
22293 reading current DIE.
22294 * Not trying to dereference contents of still incompletely read in types
22295 while reading in other DIEs.
22296 * Enable referencing still incompletely read in types just by a pointer to
22297 the type without accessing its fields.
22299 Therefore caller should follow these rules:
22300 * Try to fetch any prerequisite types we may need to build this DIE type
22301 before building the type and calling set_die_type.
22302 * After building type call set_die_type for current DIE as soon as
22303 possible before fetching more types to complete the current type.
22304 * Make the type as complete as possible before fetching more types. */
22306 static struct type
*
22307 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22309 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22310 struct objfile
*objfile
= cu
->objfile
;
22311 struct attribute
*attr
;
22312 struct dynamic_prop prop
;
22314 /* For Ada types, make sure that the gnat-specific data is always
22315 initialized (if not already set). There are a few types where
22316 we should not be doing so, because the type-specific area is
22317 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22318 where the type-specific area is used to store the floatformat).
22319 But this is not a problem, because the gnat-specific information
22320 is actually not needed for these types. */
22321 if (need_gnat_info (cu
)
22322 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22323 && TYPE_CODE (type
) != TYPE_CODE_FLT
22324 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22325 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22326 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22327 && !HAVE_GNAT_AUX_INFO (type
))
22328 INIT_GNAT_SPECIFIC (type
);
22330 /* Read DW_AT_data_location and set in type. */
22331 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22332 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22333 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
22335 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22337 dwarf2_per_objfile
->die_type_hash
=
22338 htab_create_alloc_ex (127,
22339 per_cu_offset_and_type_hash
,
22340 per_cu_offset_and_type_eq
,
22342 &objfile
->objfile_obstack
,
22343 hashtab_obstack_allocate
,
22344 dummy_obstack_deallocate
);
22347 ofs
.per_cu
= cu
->per_cu
;
22348 ofs
.offset
= die
->offset
;
22350 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22351 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22353 complaint (&symfile_complaints
,
22354 _("A problem internal to GDB: DIE 0x%x has type already set"),
22355 die
->offset
.sect_off
);
22356 *slot
= XOBNEW (&objfile
->objfile_obstack
,
22357 struct dwarf2_per_cu_offset_and_type
);
22362 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22363 or return NULL if the die does not have a saved type. */
22365 static struct type
*
22366 get_die_type_at_offset (sect_offset offset
,
22367 struct dwarf2_per_cu_data
*per_cu
)
22369 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22371 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22374 ofs
.per_cu
= per_cu
;
22375 ofs
.offset
= offset
;
22376 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
22383 /* Look up the type for DIE in CU in die_type_hash,
22384 or return NULL if DIE does not have a saved type. */
22386 static struct type
*
22387 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22389 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22392 /* Add a dependence relationship from CU to REF_PER_CU. */
22395 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22396 struct dwarf2_per_cu_data
*ref_per_cu
)
22400 if (cu
->dependencies
== NULL
)
22402 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22403 NULL
, &cu
->comp_unit_obstack
,
22404 hashtab_obstack_allocate
,
22405 dummy_obstack_deallocate
);
22407 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22409 *slot
= ref_per_cu
;
22412 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22413 Set the mark field in every compilation unit in the
22414 cache that we must keep because we are keeping CU. */
22417 dwarf2_mark_helper (void **slot
, void *data
)
22419 struct dwarf2_per_cu_data
*per_cu
;
22421 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22423 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22424 reading of the chain. As such dependencies remain valid it is not much
22425 useful to track and undo them during QUIT cleanups. */
22426 if (per_cu
->cu
== NULL
)
22429 if (per_cu
->cu
->mark
)
22431 per_cu
->cu
->mark
= 1;
22433 if (per_cu
->cu
->dependencies
!= NULL
)
22434 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22439 /* Set the mark field in CU and in every other compilation unit in the
22440 cache that we must keep because we are keeping CU. */
22443 dwarf2_mark (struct dwarf2_cu
*cu
)
22448 if (cu
->dependencies
!= NULL
)
22449 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22453 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22457 per_cu
->cu
->mark
= 0;
22458 per_cu
= per_cu
->cu
->read_in_chain
;
22462 /* Trivial hash function for partial_die_info: the hash value of a DIE
22463 is its offset in .debug_info for this objfile. */
22466 partial_die_hash (const void *item
)
22468 const struct partial_die_info
*part_die
= item
;
22470 return part_die
->offset
.sect_off
;
22473 /* Trivial comparison function for partial_die_info structures: two DIEs
22474 are equal if they have the same offset. */
22477 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22479 const struct partial_die_info
*part_die_lhs
= item_lhs
;
22480 const struct partial_die_info
*part_die_rhs
= item_rhs
;
22482 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22485 static struct cmd_list_element
*set_dwarf_cmdlist
;
22486 static struct cmd_list_element
*show_dwarf_cmdlist
;
22489 set_dwarf_cmd (char *args
, int from_tty
)
22491 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
22496 show_dwarf_cmd (char *args
, int from_tty
)
22498 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
22501 /* Free data associated with OBJFILE, if necessary. */
22504 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22506 struct dwarf2_per_objfile
*data
= d
;
22509 /* Make sure we don't accidentally use dwarf2_per_objfile while
22511 dwarf2_per_objfile
= NULL
;
22513 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22514 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22516 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22517 VEC_free (dwarf2_per_cu_ptr
,
22518 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22519 xfree (data
->all_type_units
);
22521 VEC_free (dwarf2_section_info_def
, data
->types
);
22523 if (data
->dwo_files
)
22524 free_dwo_files (data
->dwo_files
, objfile
);
22525 if (data
->dwp_file
)
22526 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22528 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22529 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22533 /* The "save gdb-index" command. */
22535 /* The contents of the hash table we create when building the string
22537 struct strtab_entry
22539 offset_type offset
;
22543 /* Hash function for a strtab_entry.
22545 Function is used only during write_hash_table so no index format backward
22546 compatibility is needed. */
22549 hash_strtab_entry (const void *e
)
22551 const struct strtab_entry
*entry
= e
;
22552 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22555 /* Equality function for a strtab_entry. */
22558 eq_strtab_entry (const void *a
, const void *b
)
22560 const struct strtab_entry
*ea
= a
;
22561 const struct strtab_entry
*eb
= b
;
22562 return !strcmp (ea
->str
, eb
->str
);
22565 /* Create a strtab_entry hash table. */
22568 create_strtab (void)
22570 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22571 xfree
, xcalloc
, xfree
);
22574 /* Add a string to the constant pool. Return the string's offset in
22578 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22581 struct strtab_entry entry
;
22582 struct strtab_entry
*result
;
22585 slot
= htab_find_slot (table
, &entry
, INSERT
);
22590 result
= XNEW (struct strtab_entry
);
22591 result
->offset
= obstack_object_size (cpool
);
22593 obstack_grow_str0 (cpool
, str
);
22596 return result
->offset
;
22599 /* An entry in the symbol table. */
22600 struct symtab_index_entry
22602 /* The name of the symbol. */
22604 /* The offset of the name in the constant pool. */
22605 offset_type index_offset
;
22606 /* A sorted vector of the indices of all the CUs that hold an object
22608 VEC (offset_type
) *cu_indices
;
22611 /* The symbol table. This is a power-of-2-sized hash table. */
22612 struct mapped_symtab
22614 offset_type n_elements
;
22616 struct symtab_index_entry
**data
;
22619 /* Hash function for a symtab_index_entry. */
22622 hash_symtab_entry (const void *e
)
22624 const struct symtab_index_entry
*entry
= e
;
22625 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22626 sizeof (offset_type
) * VEC_length (offset_type
,
22627 entry
->cu_indices
),
22631 /* Equality function for a symtab_index_entry. */
22634 eq_symtab_entry (const void *a
, const void *b
)
22636 const struct symtab_index_entry
*ea
= a
;
22637 const struct symtab_index_entry
*eb
= b
;
22638 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22639 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22641 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22642 VEC_address (offset_type
, eb
->cu_indices
),
22643 sizeof (offset_type
) * len
);
22646 /* Destroy a symtab_index_entry. */
22649 delete_symtab_entry (void *p
)
22651 struct symtab_index_entry
*entry
= p
;
22652 VEC_free (offset_type
, entry
->cu_indices
);
22656 /* Create a hash table holding symtab_index_entry objects. */
22659 create_symbol_hash_table (void)
22661 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22662 delete_symtab_entry
, xcalloc
, xfree
);
22665 /* Create a new mapped symtab object. */
22667 static struct mapped_symtab
*
22668 create_mapped_symtab (void)
22670 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22671 symtab
->n_elements
= 0;
22672 symtab
->size
= 1024;
22673 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22677 /* Destroy a mapped_symtab. */
22680 cleanup_mapped_symtab (void *p
)
22682 struct mapped_symtab
*symtab
= p
;
22683 /* The contents of the array are freed when the other hash table is
22685 xfree (symtab
->data
);
22689 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22692 Function is used only during write_hash_table so no index format backward
22693 compatibility is needed. */
22695 static struct symtab_index_entry
**
22696 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22698 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22700 index
= hash
& (symtab
->size
- 1);
22701 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22705 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22706 return &symtab
->data
[index
];
22707 index
= (index
+ step
) & (symtab
->size
- 1);
22711 /* Expand SYMTAB's hash table. */
22714 hash_expand (struct mapped_symtab
*symtab
)
22716 offset_type old_size
= symtab
->size
;
22718 struct symtab_index_entry
**old_entries
= symtab
->data
;
22721 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22723 for (i
= 0; i
< old_size
; ++i
)
22725 if (old_entries
[i
])
22727 struct symtab_index_entry
**slot
= find_slot (symtab
,
22728 old_entries
[i
]->name
);
22729 *slot
= old_entries
[i
];
22733 xfree (old_entries
);
22736 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22737 CU_INDEX is the index of the CU in which the symbol appears.
22738 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22741 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22742 int is_static
, gdb_index_symbol_kind kind
,
22743 offset_type cu_index
)
22745 struct symtab_index_entry
**slot
;
22746 offset_type cu_index_and_attrs
;
22748 ++symtab
->n_elements
;
22749 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22750 hash_expand (symtab
);
22752 slot
= find_slot (symtab
, name
);
22755 *slot
= XNEW (struct symtab_index_entry
);
22756 (*slot
)->name
= name
;
22757 /* index_offset is set later. */
22758 (*slot
)->cu_indices
= NULL
;
22761 cu_index_and_attrs
= 0;
22762 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22763 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22764 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22766 /* We don't want to record an index value twice as we want to avoid the
22768 We process all global symbols and then all static symbols
22769 (which would allow us to avoid the duplication by only having to check
22770 the last entry pushed), but a symbol could have multiple kinds in one CU.
22771 To keep things simple we don't worry about the duplication here and
22772 sort and uniqufy the list after we've processed all symbols. */
22773 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22776 /* qsort helper routine for uniquify_cu_indices. */
22779 offset_type_compare (const void *ap
, const void *bp
)
22781 offset_type a
= *(offset_type
*) ap
;
22782 offset_type b
= *(offset_type
*) bp
;
22784 return (a
> b
) - (b
> a
);
22787 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22790 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22794 for (i
= 0; i
< symtab
->size
; ++i
)
22796 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22799 && entry
->cu_indices
!= NULL
)
22801 unsigned int next_to_insert
, next_to_check
;
22802 offset_type last_value
;
22804 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22805 VEC_length (offset_type
, entry
->cu_indices
),
22806 sizeof (offset_type
), offset_type_compare
);
22808 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22809 next_to_insert
= 1;
22810 for (next_to_check
= 1;
22811 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22814 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22817 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22819 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22824 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22829 /* Add a vector of indices to the constant pool. */
22832 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22833 struct symtab_index_entry
*entry
)
22837 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22840 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22841 offset_type val
= MAYBE_SWAP (len
);
22846 entry
->index_offset
= obstack_object_size (cpool
);
22848 obstack_grow (cpool
, &val
, sizeof (val
));
22850 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22853 val
= MAYBE_SWAP (iter
);
22854 obstack_grow (cpool
, &val
, sizeof (val
));
22859 struct symtab_index_entry
*old_entry
= *slot
;
22860 entry
->index_offset
= old_entry
->index_offset
;
22863 return entry
->index_offset
;
22866 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22867 constant pool entries going into the obstack CPOOL. */
22870 write_hash_table (struct mapped_symtab
*symtab
,
22871 struct obstack
*output
, struct obstack
*cpool
)
22874 htab_t symbol_hash_table
;
22877 symbol_hash_table
= create_symbol_hash_table ();
22878 str_table
= create_strtab ();
22880 /* We add all the index vectors to the constant pool first, to
22881 ensure alignment is ok. */
22882 for (i
= 0; i
< symtab
->size
; ++i
)
22884 if (symtab
->data
[i
])
22885 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22888 /* Now write out the hash table. */
22889 for (i
= 0; i
< symtab
->size
; ++i
)
22891 offset_type str_off
, vec_off
;
22893 if (symtab
->data
[i
])
22895 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22896 vec_off
= symtab
->data
[i
]->index_offset
;
22900 /* While 0 is a valid constant pool index, it is not valid
22901 to have 0 for both offsets. */
22906 str_off
= MAYBE_SWAP (str_off
);
22907 vec_off
= MAYBE_SWAP (vec_off
);
22909 obstack_grow (output
, &str_off
, sizeof (str_off
));
22910 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22913 htab_delete (str_table
);
22914 htab_delete (symbol_hash_table
);
22917 /* Struct to map psymtab to CU index in the index file. */
22918 struct psymtab_cu_index_map
22920 struct partial_symtab
*psymtab
;
22921 unsigned int cu_index
;
22925 hash_psymtab_cu_index (const void *item
)
22927 const struct psymtab_cu_index_map
*map
= item
;
22929 return htab_hash_pointer (map
->psymtab
);
22933 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22935 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22936 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22938 return lhs
->psymtab
== rhs
->psymtab
;
22941 /* Helper struct for building the address table. */
22942 struct addrmap_index_data
22944 struct objfile
*objfile
;
22945 struct obstack
*addr_obstack
;
22946 htab_t cu_index_htab
;
22948 /* Non-zero if the previous_* fields are valid.
22949 We can't write an entry until we see the next entry (since it is only then
22950 that we know the end of the entry). */
22951 int previous_valid
;
22952 /* Index of the CU in the table of all CUs in the index file. */
22953 unsigned int previous_cu_index
;
22954 /* Start address of the CU. */
22955 CORE_ADDR previous_cu_start
;
22958 /* Write an address entry to OBSTACK. */
22961 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22962 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22964 offset_type cu_index_to_write
;
22966 CORE_ADDR baseaddr
;
22968 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22970 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22971 obstack_grow (obstack
, addr
, 8);
22972 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22973 obstack_grow (obstack
, addr
, 8);
22974 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22975 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22978 /* Worker function for traversing an addrmap to build the address table. */
22981 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22983 struct addrmap_index_data
*data
= datap
;
22984 struct partial_symtab
*pst
= obj
;
22986 if (data
->previous_valid
)
22987 add_address_entry (data
->objfile
, data
->addr_obstack
,
22988 data
->previous_cu_start
, start_addr
,
22989 data
->previous_cu_index
);
22991 data
->previous_cu_start
= start_addr
;
22994 struct psymtab_cu_index_map find_map
, *map
;
22995 find_map
.psymtab
= pst
;
22996 map
= htab_find (data
->cu_index_htab
, &find_map
);
22997 gdb_assert (map
!= NULL
);
22998 data
->previous_cu_index
= map
->cu_index
;
22999 data
->previous_valid
= 1;
23002 data
->previous_valid
= 0;
23007 /* Write OBJFILE's address map to OBSTACK.
23008 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23009 in the index file. */
23012 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
23013 htab_t cu_index_htab
)
23015 struct addrmap_index_data addrmap_index_data
;
23017 /* When writing the address table, we have to cope with the fact that
23018 the addrmap iterator only provides the start of a region; we have to
23019 wait until the next invocation to get the start of the next region. */
23021 addrmap_index_data
.objfile
= objfile
;
23022 addrmap_index_data
.addr_obstack
= obstack
;
23023 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
23024 addrmap_index_data
.previous_valid
= 0;
23026 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23027 &addrmap_index_data
);
23029 /* It's highly unlikely the last entry (end address = 0xff...ff)
23030 is valid, but we should still handle it.
23031 The end address is recorded as the start of the next region, but that
23032 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23034 if (addrmap_index_data
.previous_valid
)
23035 add_address_entry (objfile
, obstack
,
23036 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23037 addrmap_index_data
.previous_cu_index
);
23040 /* Return the symbol kind of PSYM. */
23042 static gdb_index_symbol_kind
23043 symbol_kind (struct partial_symbol
*psym
)
23045 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23046 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23054 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23056 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23058 case LOC_CONST_BYTES
:
23059 case LOC_OPTIMIZED_OUT
:
23061 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23063 /* Note: It's currently impossible to recognize psyms as enum values
23064 short of reading the type info. For now punt. */
23065 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23067 /* There are other LOC_FOO values that one might want to classify
23068 as variables, but dwarf2read.c doesn't currently use them. */
23069 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23071 case STRUCT_DOMAIN
:
23072 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23074 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23078 /* Add a list of partial symbols to SYMTAB. */
23081 write_psymbols (struct mapped_symtab
*symtab
,
23083 struct partial_symbol
**psymp
,
23085 offset_type cu_index
,
23088 for (; count
-- > 0; ++psymp
)
23090 struct partial_symbol
*psym
= *psymp
;
23093 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23094 error (_("Ada is not currently supported by the index"));
23096 /* Only add a given psymbol once. */
23097 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
23100 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23103 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23104 is_static
, kind
, cu_index
);
23109 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
23110 exception if there is an error. */
23113 write_obstack (FILE *file
, struct obstack
*obstack
)
23115 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
23117 != obstack_object_size (obstack
))
23118 error (_("couldn't data write to file"));
23121 /* Unlink a file if the argument is not NULL. */
23124 unlink_if_set (void *p
)
23126 char **filename
= p
;
23128 unlink (*filename
);
23131 /* A helper struct used when iterating over debug_types. */
23132 struct signatured_type_index_data
23134 struct objfile
*objfile
;
23135 struct mapped_symtab
*symtab
;
23136 struct obstack
*types_list
;
23141 /* A helper function that writes a single signatured_type to an
23145 write_one_signatured_type (void **slot
, void *d
)
23147 struct signatured_type_index_data
*info
= d
;
23148 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23149 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23152 write_psymbols (info
->symtab
,
23154 info
->objfile
->global_psymbols
.list
23155 + psymtab
->globals_offset
,
23156 psymtab
->n_global_syms
, info
->cu_index
,
23158 write_psymbols (info
->symtab
,
23160 info
->objfile
->static_psymbols
.list
23161 + psymtab
->statics_offset
,
23162 psymtab
->n_static_syms
, info
->cu_index
,
23165 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23166 entry
->per_cu
.offset
.sect_off
);
23167 obstack_grow (info
->types_list
, val
, 8);
23168 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23169 entry
->type_offset_in_tu
.cu_off
);
23170 obstack_grow (info
->types_list
, val
, 8);
23171 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23172 obstack_grow (info
->types_list
, val
, 8);
23179 /* Recurse into all "included" dependencies and write their symbols as
23180 if they appeared in this psymtab. */
23183 recursively_write_psymbols (struct objfile
*objfile
,
23184 struct partial_symtab
*psymtab
,
23185 struct mapped_symtab
*symtab
,
23187 offset_type cu_index
)
23191 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23192 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23193 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23194 symtab
, psyms_seen
, cu_index
);
23196 write_psymbols (symtab
,
23198 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23199 psymtab
->n_global_syms
, cu_index
,
23201 write_psymbols (symtab
,
23203 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23204 psymtab
->n_static_syms
, cu_index
,
23208 /* Create an index file for OBJFILE in the directory DIR. */
23211 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23213 struct cleanup
*cleanup
;
23214 char *filename
, *cleanup_filename
;
23215 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
23216 struct obstack cu_list
, types_cu_list
;
23219 struct mapped_symtab
*symtab
;
23220 offset_type val
, size_of_contents
, total_len
;
23223 htab_t cu_index_htab
;
23224 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
23226 if (dwarf2_per_objfile
->using_index
)
23227 error (_("Cannot use an index to create the index"));
23229 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23230 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23232 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23235 if (stat (objfile_name (objfile
), &st
) < 0)
23236 perror_with_name (objfile_name (objfile
));
23238 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
23239 INDEX_SUFFIX
, (char *) NULL
);
23240 cleanup
= make_cleanup (xfree
, filename
);
23242 out_file
= gdb_fopen_cloexec (filename
, "wb");
23244 error (_("Can't open `%s' for writing"), filename
);
23246 cleanup_filename
= filename
;
23247 make_cleanup (unlink_if_set
, &cleanup_filename
);
23249 symtab
= create_mapped_symtab ();
23250 make_cleanup (cleanup_mapped_symtab
, symtab
);
23252 obstack_init (&addr_obstack
);
23253 make_cleanup_obstack_free (&addr_obstack
);
23255 obstack_init (&cu_list
);
23256 make_cleanup_obstack_free (&cu_list
);
23258 obstack_init (&types_cu_list
);
23259 make_cleanup_obstack_free (&types_cu_list
);
23261 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
23262 NULL
, xcalloc
, xfree
);
23263 make_cleanup_htab_delete (psyms_seen
);
23265 /* While we're scanning CU's create a table that maps a psymtab pointer
23266 (which is what addrmap records) to its index (which is what is recorded
23267 in the index file). This will later be needed to write the address
23269 cu_index_htab
= htab_create_alloc (100,
23270 hash_psymtab_cu_index
,
23271 eq_psymtab_cu_index
,
23272 NULL
, xcalloc
, xfree
);
23273 make_cleanup_htab_delete (cu_index_htab
);
23274 psymtab_cu_index_map
= XNEWVEC (struct psymtab_cu_index_map
,
23275 dwarf2_per_objfile
->n_comp_units
);
23276 make_cleanup (xfree
, psymtab_cu_index_map
);
23278 /* The CU list is already sorted, so we don't need to do additional
23279 work here. Also, the debug_types entries do not appear in
23280 all_comp_units, but only in their own hash table. */
23281 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23283 struct dwarf2_per_cu_data
*per_cu
23284 = dwarf2_per_objfile
->all_comp_units
[i
];
23285 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23287 struct psymtab_cu_index_map
*map
;
23290 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23291 It may be referenced from a local scope but in such case it does not
23292 need to be present in .gdb_index. */
23293 if (psymtab
== NULL
)
23296 if (psymtab
->user
== NULL
)
23297 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23299 map
= &psymtab_cu_index_map
[i
];
23300 map
->psymtab
= psymtab
;
23302 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23303 gdb_assert (slot
!= NULL
);
23304 gdb_assert (*slot
== NULL
);
23307 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23308 per_cu
->offset
.sect_off
);
23309 obstack_grow (&cu_list
, val
, 8);
23310 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23311 obstack_grow (&cu_list
, val
, 8);
23314 /* Dump the address map. */
23315 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23317 /* Write out the .debug_type entries, if any. */
23318 if (dwarf2_per_objfile
->signatured_types
)
23320 struct signatured_type_index_data sig_data
;
23322 sig_data
.objfile
= objfile
;
23323 sig_data
.symtab
= symtab
;
23324 sig_data
.types_list
= &types_cu_list
;
23325 sig_data
.psyms_seen
= psyms_seen
;
23326 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23327 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23328 write_one_signatured_type
, &sig_data
);
23331 /* Now that we've processed all symbols we can shrink their cu_indices
23333 uniquify_cu_indices (symtab
);
23335 obstack_init (&constant_pool
);
23336 make_cleanup_obstack_free (&constant_pool
);
23337 obstack_init (&symtab_obstack
);
23338 make_cleanup_obstack_free (&symtab_obstack
);
23339 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23341 obstack_init (&contents
);
23342 make_cleanup_obstack_free (&contents
);
23343 size_of_contents
= 6 * sizeof (offset_type
);
23344 total_len
= size_of_contents
;
23346 /* The version number. */
23347 val
= MAYBE_SWAP (8);
23348 obstack_grow (&contents
, &val
, sizeof (val
));
23350 /* The offset of the CU list from the start of the file. */
23351 val
= MAYBE_SWAP (total_len
);
23352 obstack_grow (&contents
, &val
, sizeof (val
));
23353 total_len
+= obstack_object_size (&cu_list
);
23355 /* The offset of the types CU list from the start of the file. */
23356 val
= MAYBE_SWAP (total_len
);
23357 obstack_grow (&contents
, &val
, sizeof (val
));
23358 total_len
+= obstack_object_size (&types_cu_list
);
23360 /* The offset of the address table from the start of the file. */
23361 val
= MAYBE_SWAP (total_len
);
23362 obstack_grow (&contents
, &val
, sizeof (val
));
23363 total_len
+= obstack_object_size (&addr_obstack
);
23365 /* The offset of the symbol table from the start of the file. */
23366 val
= MAYBE_SWAP (total_len
);
23367 obstack_grow (&contents
, &val
, sizeof (val
));
23368 total_len
+= obstack_object_size (&symtab_obstack
);
23370 /* The offset of the constant pool from the start of the file. */
23371 val
= MAYBE_SWAP (total_len
);
23372 obstack_grow (&contents
, &val
, sizeof (val
));
23373 total_len
+= obstack_object_size (&constant_pool
);
23375 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23377 write_obstack (out_file
, &contents
);
23378 write_obstack (out_file
, &cu_list
);
23379 write_obstack (out_file
, &types_cu_list
);
23380 write_obstack (out_file
, &addr_obstack
);
23381 write_obstack (out_file
, &symtab_obstack
);
23382 write_obstack (out_file
, &constant_pool
);
23386 /* We want to keep the file, so we set cleanup_filename to NULL
23387 here. See unlink_if_set. */
23388 cleanup_filename
= NULL
;
23390 do_cleanups (cleanup
);
23393 /* Implementation of the `save gdb-index' command.
23395 Note that the file format used by this command is documented in the
23396 GDB manual. Any changes here must be documented there. */
23399 save_gdb_index_command (char *arg
, int from_tty
)
23401 struct objfile
*objfile
;
23404 error (_("usage: save gdb-index DIRECTORY"));
23406 ALL_OBJFILES (objfile
)
23410 /* If the objfile does not correspond to an actual file, skip it. */
23411 if (stat (objfile_name (objfile
), &st
) < 0)
23414 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
23415 if (dwarf2_per_objfile
)
23420 write_psymtabs_to_index (objfile
, arg
);
23422 CATCH (except
, RETURN_MASK_ERROR
)
23424 exception_fprintf (gdb_stderr
, except
,
23425 _("Error while writing index for `%s': "),
23426 objfile_name (objfile
));
23435 int dwarf_always_disassemble
;
23438 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
23439 struct cmd_list_element
*c
, const char *value
)
23441 fprintf_filtered (file
,
23442 _("Whether to always disassemble "
23443 "DWARF expressions is %s.\n"),
23448 show_check_physname (struct ui_file
*file
, int from_tty
,
23449 struct cmd_list_element
*c
, const char *value
)
23451 fprintf_filtered (file
,
23452 _("Whether to check \"physname\" is %s.\n"),
23456 void _initialize_dwarf2_read (void);
23459 _initialize_dwarf2_read (void)
23461 struct cmd_list_element
*c
;
23463 dwarf2_objfile_data_key
23464 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23466 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
23467 Set DWARF specific variables.\n\
23468 Configure DWARF variables such as the cache size"),
23469 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23470 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23472 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
23473 Show DWARF specific variables\n\
23474 Show DWARF variables such as the cache size"),
23475 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23476 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23478 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23479 &dwarf_max_cache_age
, _("\
23480 Set the upper bound on the age of cached DWARF compilation units."), _("\
23481 Show the upper bound on the age of cached DWARF compilation units."), _("\
23482 A higher limit means that cached compilation units will be stored\n\
23483 in memory longer, and more total memory will be used. Zero disables\n\
23484 caching, which can slow down startup."),
23486 show_dwarf_max_cache_age
,
23487 &set_dwarf_cmdlist
,
23488 &show_dwarf_cmdlist
);
23490 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23491 &dwarf_always_disassemble
, _("\
23492 Set whether `info address' always disassembles DWARF expressions."), _("\
23493 Show whether `info address' always disassembles DWARF expressions."), _("\
23494 When enabled, DWARF expressions are always printed in an assembly-like\n\
23495 syntax. When disabled, expressions will be printed in a more\n\
23496 conversational style, when possible."),
23498 show_dwarf_always_disassemble
,
23499 &set_dwarf_cmdlist
,
23500 &show_dwarf_cmdlist
);
23502 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23503 Set debugging of the DWARF reader."), _("\
23504 Show debugging of the DWARF reader."), _("\
23505 When enabled (non-zero), debugging messages are printed during DWARF\n\
23506 reading and symtab expansion. A value of 1 (one) provides basic\n\
23507 information. A value greater than 1 provides more verbose information."),
23510 &setdebuglist
, &showdebuglist
);
23512 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23513 Set debugging of the DWARF DIE reader."), _("\
23514 Show debugging of the DWARF DIE reader."), _("\
23515 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23516 The value is the maximum depth to print."),
23519 &setdebuglist
, &showdebuglist
);
23521 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23522 Set debugging of the dwarf line reader."), _("\
23523 Show debugging of the dwarf line reader."), _("\
23524 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23525 A value of 1 (one) provides basic information.\n\
23526 A value greater than 1 provides more verbose information."),
23529 &setdebuglist
, &showdebuglist
);
23531 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23532 Set cross-checking of \"physname\" code against demangler."), _("\
23533 Show cross-checking of \"physname\" code against demangler."), _("\
23534 When enabled, GDB's internal \"physname\" code is checked against\n\
23536 NULL
, show_check_physname
,
23537 &setdebuglist
, &showdebuglist
);
23539 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23540 no_class
, &use_deprecated_index_sections
, _("\
23541 Set whether to use deprecated gdb_index sections."), _("\
23542 Show whether to use deprecated gdb_index sections."), _("\
23543 When enabled, deprecated .gdb_index sections are used anyway.\n\
23544 Normally they are ignored either because of a missing feature or\n\
23545 performance issue.\n\
23546 Warning: This option must be enabled before gdb reads the file."),
23549 &setlist
, &showlist
);
23551 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23553 Save a gdb-index file.\n\
23554 Usage: save gdb-index DIRECTORY"),
23556 set_cmd_completer (c
, filename_completer
);
23558 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23559 &dwarf2_locexpr_funcs
);
23560 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23561 &dwarf2_loclist_funcs
);
23563 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23564 &dwarf2_block_frame_base_locexpr_funcs
);
23565 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23566 &dwarf2_block_frame_base_loclist_funcs
);