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"
74 #include <sys/types.h>
76 typedef struct symbol
*symbolp
;
79 /* When == 1, print basic high level tracing messages.
80 When > 1, be more verbose.
81 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
82 static unsigned int dwarf2_read_debug
= 0;
84 /* When non-zero, dump DIEs after they are read in. */
85 static unsigned int dwarf2_die_debug
= 0;
87 /* When non-zero, cross-check physname against demangler. */
88 static int check_physname
= 0;
90 /* When non-zero, do not reject deprecated .gdb_index sections. */
91 static int use_deprecated_index_sections
= 0;
93 static const struct objfile_data
*dwarf2_objfile_data_key
;
95 /* The "aclass" indices for various kinds of computed DWARF symbols. */
97 static int dwarf2_locexpr_index
;
98 static int dwarf2_loclist_index
;
99 static int dwarf2_locexpr_block_index
;
100 static int dwarf2_loclist_block_index
;
102 /* A descriptor for dwarf sections.
104 S.ASECTION, SIZE are typically initialized when the objfile is first
105 scanned. BUFFER, READIN are filled in later when the section is read.
106 If the section contained compressed data then SIZE is updated to record
107 the uncompressed size of the section.
109 DWP file format V2 introduces a wrinkle that is easiest to handle by
110 creating the concept of virtual sections contained within a real section.
111 In DWP V2 the sections of the input DWO files are concatenated together
112 into one section, but section offsets are kept relative to the original
114 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
115 the real section this "virtual" section is contained in, and BUFFER,SIZE
116 describe the virtual section. */
118 struct dwarf2_section_info
122 /* If this is a real section, the bfd section. */
124 /* If this is a virtual section, pointer to the containing ("real")
126 struct dwarf2_section_info
*containing_section
;
128 /* Pointer to section data, only valid if readin. */
129 const gdb_byte
*buffer
;
130 /* The size of the section, real or virtual. */
132 /* If this is a virtual section, the offset in the real section.
133 Only valid if is_virtual. */
134 bfd_size_type virtual_offset
;
135 /* True if we have tried to read this section. */
137 /* True if this is a virtual section, False otherwise.
138 This specifies which of s.asection and s.containing_section to use. */
142 typedef struct dwarf2_section_info dwarf2_section_info_def
;
143 DEF_VEC_O (dwarf2_section_info_def
);
145 /* All offsets in the index are of this type. It must be
146 architecture-independent. */
147 typedef uint32_t offset_type
;
149 DEF_VEC_I (offset_type
);
151 /* Ensure only legit values are used. */
152 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
154 gdb_assert ((unsigned int) (value) <= 1); \
155 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
158 /* Ensure only legit values are used. */
159 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
161 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
162 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
163 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
166 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
167 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
169 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
170 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
173 /* A description of the mapped index. The file format is described in
174 a comment by the code that writes the index. */
177 /* Index data format version. */
180 /* The total length of the buffer. */
183 /* A pointer to the address table data. */
184 const gdb_byte
*address_table
;
186 /* Size of the address table data in bytes. */
187 offset_type address_table_size
;
189 /* The symbol table, implemented as a hash table. */
190 const offset_type
*symbol_table
;
192 /* Size in slots, each slot is 2 offset_types. */
193 offset_type symbol_table_slots
;
195 /* A pointer to the constant pool. */
196 const char *constant_pool
;
199 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
200 DEF_VEC_P (dwarf2_per_cu_ptr
);
202 /* Collection of data recorded per objfile.
203 This hangs off of dwarf2_objfile_data_key. */
205 struct dwarf2_per_objfile
207 struct dwarf2_section_info info
;
208 struct dwarf2_section_info abbrev
;
209 struct dwarf2_section_info line
;
210 struct dwarf2_section_info loc
;
211 struct dwarf2_section_info macinfo
;
212 struct dwarf2_section_info macro
;
213 struct dwarf2_section_info str
;
214 struct dwarf2_section_info ranges
;
215 struct dwarf2_section_info addr
;
216 struct dwarf2_section_info frame
;
217 struct dwarf2_section_info eh_frame
;
218 struct dwarf2_section_info gdb_index
;
220 VEC (dwarf2_section_info_def
) *types
;
223 struct objfile
*objfile
;
225 /* Table of all the compilation units. This is used to locate
226 the target compilation unit of a particular reference. */
227 struct dwarf2_per_cu_data
**all_comp_units
;
229 /* The number of compilation units in ALL_COMP_UNITS. */
232 /* The number of .debug_types-related CUs. */
235 /* The number of elements allocated in all_type_units.
236 If there are skeleton-less TUs, we add them to all_type_units lazily. */
237 int n_allocated_type_units
;
239 /* The .debug_types-related CUs (TUs).
240 This is stored in malloc space because we may realloc it. */
241 struct signatured_type
**all_type_units
;
243 /* Table of struct type_unit_group objects.
244 The hash key is the DW_AT_stmt_list value. */
245 htab_t type_unit_groups
;
247 /* A table mapping .debug_types signatures to its signatured_type entry.
248 This is NULL if the .debug_types section hasn't been read in yet. */
249 htab_t signatured_types
;
251 /* Type unit statistics, to see how well the scaling improvements
255 int nr_uniq_abbrev_tables
;
257 int nr_symtab_sharers
;
258 int nr_stmt_less_type_units
;
259 int nr_all_type_units_reallocs
;
262 /* A chain of compilation units that are currently read in, so that
263 they can be freed later. */
264 struct dwarf2_per_cu_data
*read_in_chain
;
266 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
267 This is NULL if the table hasn't been allocated yet. */
270 /* Non-zero if we've check for whether there is a DWP file. */
273 /* The DWP file if there is one, or NULL. */
274 struct dwp_file
*dwp_file
;
276 /* The shared '.dwz' file, if one exists. This is used when the
277 original data was compressed using 'dwz -m'. */
278 struct dwz_file
*dwz_file
;
280 /* A flag indicating wether this objfile has a section loaded at a
282 int has_section_at_zero
;
284 /* True if we are using the mapped index,
285 or we are faking it for OBJF_READNOW's sake. */
286 unsigned char using_index
;
288 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
289 struct mapped_index
*index_table
;
291 /* When using index_table, this keeps track of all quick_file_names entries.
292 TUs typically share line table entries with a CU, so we maintain a
293 separate table of all line table entries to support the sharing.
294 Note that while there can be way more TUs than CUs, we've already
295 sorted all the TUs into "type unit groups", grouped by their
296 DW_AT_stmt_list value. Therefore the only sharing done here is with a
297 CU and its associated TU group if there is one. */
298 htab_t quick_file_names_table
;
300 /* Set during partial symbol reading, to prevent queueing of full
302 int reading_partial_symbols
;
304 /* Table mapping type DIEs to their struct type *.
305 This is NULL if not allocated yet.
306 The mapping is done via (CU/TU + DIE offset) -> type. */
307 htab_t die_type_hash
;
309 /* The CUs we recently read. */
310 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
312 /* Table containing line_header indexed by offset and offset_in_dwz. */
313 htab_t line_header_hash
;
316 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
318 /* Default names of the debugging sections. */
320 /* Note that if the debugging section has been compressed, it might
321 have a name like .zdebug_info. */
323 static const struct dwarf2_debug_sections dwarf2_elf_names
=
325 { ".debug_info", ".zdebug_info" },
326 { ".debug_abbrev", ".zdebug_abbrev" },
327 { ".debug_line", ".zdebug_line" },
328 { ".debug_loc", ".zdebug_loc" },
329 { ".debug_macinfo", ".zdebug_macinfo" },
330 { ".debug_macro", ".zdebug_macro" },
331 { ".debug_str", ".zdebug_str" },
332 { ".debug_ranges", ".zdebug_ranges" },
333 { ".debug_types", ".zdebug_types" },
334 { ".debug_addr", ".zdebug_addr" },
335 { ".debug_frame", ".zdebug_frame" },
336 { ".eh_frame", NULL
},
337 { ".gdb_index", ".zgdb_index" },
341 /* List of DWO/DWP sections. */
343 static const struct dwop_section_names
345 struct dwarf2_section_names abbrev_dwo
;
346 struct dwarf2_section_names info_dwo
;
347 struct dwarf2_section_names line_dwo
;
348 struct dwarf2_section_names loc_dwo
;
349 struct dwarf2_section_names macinfo_dwo
;
350 struct dwarf2_section_names macro_dwo
;
351 struct dwarf2_section_names str_dwo
;
352 struct dwarf2_section_names str_offsets_dwo
;
353 struct dwarf2_section_names types_dwo
;
354 struct dwarf2_section_names cu_index
;
355 struct dwarf2_section_names tu_index
;
359 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
360 { ".debug_info.dwo", ".zdebug_info.dwo" },
361 { ".debug_line.dwo", ".zdebug_line.dwo" },
362 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
363 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
364 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
365 { ".debug_str.dwo", ".zdebug_str.dwo" },
366 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
367 { ".debug_types.dwo", ".zdebug_types.dwo" },
368 { ".debug_cu_index", ".zdebug_cu_index" },
369 { ".debug_tu_index", ".zdebug_tu_index" },
372 /* local data types */
374 /* The data in a compilation unit header, after target2host
375 translation, looks like this. */
376 struct comp_unit_head
380 unsigned char addr_size
;
381 unsigned char signed_addr_p
;
382 sect_offset abbrev_offset
;
384 /* Size of file offsets; either 4 or 8. */
385 unsigned int offset_size
;
387 /* Size of the length field; either 4 or 12. */
388 unsigned int initial_length_size
;
390 /* Offset to the first byte of this compilation unit header in the
391 .debug_info section, for resolving relative reference dies. */
394 /* Offset to first die in this cu from the start of the cu.
395 This will be the first byte following the compilation unit header. */
396 cu_offset first_die_offset
;
399 /* Type used for delaying computation of method physnames.
400 See comments for compute_delayed_physnames. */
401 struct delayed_method_info
403 /* The type to which the method is attached, i.e., its parent class. */
406 /* The index of the method in the type's function fieldlists. */
409 /* The index of the method in the fieldlist. */
412 /* The name of the DIE. */
415 /* The DIE associated with this method. */
416 struct die_info
*die
;
419 typedef struct delayed_method_info delayed_method_info
;
420 DEF_VEC_O (delayed_method_info
);
422 /* Internal state when decoding a particular compilation unit. */
425 /* The objfile containing this compilation unit. */
426 struct objfile
*objfile
;
428 /* The header of the compilation unit. */
429 struct comp_unit_head header
;
431 /* Base address of this compilation unit. */
432 CORE_ADDR base_address
;
434 /* Non-zero if base_address has been set. */
437 /* The language we are debugging. */
438 enum language language
;
439 const struct language_defn
*language_defn
;
441 const char *producer
;
443 /* The generic symbol table building routines have separate lists for
444 file scope symbols and all all other scopes (local scopes). So
445 we need to select the right one to pass to add_symbol_to_list().
446 We do it by keeping a pointer to the correct list in list_in_scope.
448 FIXME: The original dwarf code just treated the file scope as the
449 first local scope, and all other local scopes as nested local
450 scopes, and worked fine. Check to see if we really need to
451 distinguish these in buildsym.c. */
452 struct pending
**list_in_scope
;
454 /* The abbrev table for this CU.
455 Normally this points to the abbrev table in the objfile.
456 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
457 struct abbrev_table
*abbrev_table
;
459 /* Hash table holding all the loaded partial DIEs
460 with partial_die->offset.SECT_OFF as hash. */
463 /* Storage for things with the same lifetime as this read-in compilation
464 unit, including partial DIEs. */
465 struct obstack comp_unit_obstack
;
467 /* When multiple dwarf2_cu structures are living in memory, this field
468 chains them all together, so that they can be released efficiently.
469 We will probably also want a generation counter so that most-recently-used
470 compilation units are cached... */
471 struct dwarf2_per_cu_data
*read_in_chain
;
473 /* Backlink to our per_cu entry. */
474 struct dwarf2_per_cu_data
*per_cu
;
476 /* How many compilation units ago was this CU last referenced? */
479 /* A hash table of DIE cu_offset for following references with
480 die_info->offset.sect_off as hash. */
483 /* Full DIEs if read in. */
484 struct die_info
*dies
;
486 /* A set of pointers to dwarf2_per_cu_data objects for compilation
487 units referenced by this one. Only set during full symbol processing;
488 partial symbol tables do not have dependencies. */
491 /* Header data from the line table, during full symbol processing. */
492 struct line_header
*line_header
;
494 /* A list of methods which need to have physnames computed
495 after all type information has been read. */
496 VEC (delayed_method_info
) *method_list
;
498 /* To be copied to symtab->call_site_htab. */
499 htab_t call_site_htab
;
501 /* Non-NULL if this CU came from a DWO file.
502 There is an invariant here that is important to remember:
503 Except for attributes copied from the top level DIE in the "main"
504 (or "stub") file in preparation for reading the DWO file
505 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
506 Either there isn't a DWO file (in which case this is NULL and the point
507 is moot), or there is and either we're not going to read it (in which
508 case this is NULL) or there is and we are reading it (in which case this
510 struct dwo_unit
*dwo_unit
;
512 /* The DW_AT_addr_base attribute if present, zero otherwise
513 (zero is a valid value though).
514 Note this value comes from the Fission stub CU/TU's DIE. */
517 /* The DW_AT_ranges_base attribute if present, zero otherwise
518 (zero is a valid value though).
519 Note this value comes from the Fission stub CU/TU's DIE.
520 Also note that the value is zero in the non-DWO case so this value can
521 be used without needing to know whether DWO files are in use or not.
522 N.B. This does not apply to DW_AT_ranges appearing in
523 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
524 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
525 DW_AT_ranges_base *would* have to be applied, and we'd have to care
526 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
527 ULONGEST ranges_base
;
529 /* Mark used when releasing cached dies. */
530 unsigned int mark
: 1;
532 /* This CU references .debug_loc. See the symtab->locations_valid field.
533 This test is imperfect as there may exist optimized debug code not using
534 any location list and still facing inlining issues if handled as
535 unoptimized code. For a future better test see GCC PR other/32998. */
536 unsigned int has_loclist
: 1;
538 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
539 if all the producer_is_* fields are valid. This information is cached
540 because profiling CU expansion showed excessive time spent in
541 producer_is_gxx_lt_4_6. */
542 unsigned int checked_producer
: 1;
543 unsigned int producer_is_gxx_lt_4_6
: 1;
544 unsigned int producer_is_gcc_lt_4_3
: 1;
545 unsigned int producer_is_icc
: 1;
547 /* When set, the file that we're processing is known to have
548 debugging info for C++ namespaces. GCC 3.3.x did not produce
549 this information, but later versions do. */
551 unsigned int processing_has_namespace_info
: 1;
554 /* Persistent data held for a compilation unit, even when not
555 processing it. We put a pointer to this structure in the
556 read_symtab_private field of the psymtab. */
558 struct dwarf2_per_cu_data
560 /* The start offset and length of this compilation unit.
561 NOTE: Unlike comp_unit_head.length, this length includes
563 If the DIE refers to a DWO file, this is always of the original die,
568 /* Flag indicating this compilation unit will be read in before
569 any of the current compilation units are processed. */
570 unsigned int queued
: 1;
572 /* This flag will be set when reading partial DIEs if we need to load
573 absolutely all DIEs for this compilation unit, instead of just the ones
574 we think are interesting. It gets set if we look for a DIE in the
575 hash table and don't find it. */
576 unsigned int load_all_dies
: 1;
578 /* Non-zero if this CU is from .debug_types.
579 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
581 unsigned int is_debug_types
: 1;
583 /* Non-zero if this CU is from the .dwz file. */
584 unsigned int is_dwz
: 1;
586 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
587 This flag is only valid if is_debug_types is true.
588 We can't read a CU directly from a DWO file: There are required
589 attributes in the stub. */
590 unsigned int reading_dwo_directly
: 1;
592 /* Non-zero if the TU has been read.
593 This is used to assist the "Stay in DWO Optimization" for Fission:
594 When reading a DWO, it's faster to read TUs from the DWO instead of
595 fetching them from random other DWOs (due to comdat folding).
596 If the TU has already been read, the optimization is unnecessary
597 (and unwise - we don't want to change where gdb thinks the TU lives
599 This flag is only valid if is_debug_types is true. */
600 unsigned int tu_read
: 1;
602 /* The section this CU/TU lives in.
603 If the DIE refers to a DWO file, this is always the original die,
605 struct dwarf2_section_info
*section
;
607 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
608 of the CU cache it gets reset to NULL again. */
609 struct dwarf2_cu
*cu
;
611 /* The corresponding objfile.
612 Normally we can get the objfile from dwarf2_per_objfile.
613 However we can enter this file with just a "per_cu" handle. */
614 struct objfile
*objfile
;
616 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
617 is active. Otherwise, the 'psymtab' field is active. */
620 /* The partial symbol table associated with this compilation unit,
621 or NULL for unread partial units. */
622 struct partial_symtab
*psymtab
;
624 /* Data needed by the "quick" functions. */
625 struct dwarf2_per_cu_quick_data
*quick
;
628 /* The CUs we import using DW_TAG_imported_unit. This is filled in
629 while reading psymtabs, used to compute the psymtab dependencies,
630 and then cleared. Then it is filled in again while reading full
631 symbols, and only deleted when the objfile is destroyed.
633 This is also used to work around a difference between the way gold
634 generates .gdb_index version <=7 and the way gdb does. Arguably this
635 is a gold bug. For symbols coming from TUs, gold records in the index
636 the CU that includes the TU instead of the TU itself. This breaks
637 dw2_lookup_symbol: It assumes that if the index says symbol X lives
638 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
639 will find X. Alas TUs live in their own symtab, so after expanding CU Y
640 we need to look in TU Z to find X. Fortunately, this is akin to
641 DW_TAG_imported_unit, so we just use the same mechanism: For
642 .gdb_index version <=7 this also records the TUs that the CU referred
643 to. Concurrently with this change gdb was modified to emit version 8
644 indices so we only pay a price for gold generated indices.
645 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
646 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
649 /* Entry in the signatured_types hash table. */
651 struct signatured_type
653 /* The "per_cu" object of this type.
654 This struct is used iff per_cu.is_debug_types.
655 N.B.: This is the first member so that it's easy to convert pointers
657 struct dwarf2_per_cu_data per_cu
;
659 /* The type's signature. */
662 /* Offset in the TU of the type's DIE, as read from the TU header.
663 If this TU is a DWO stub and the definition lives in a DWO file
664 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
665 cu_offset type_offset_in_tu
;
667 /* Offset in the section of the type's DIE.
668 If the definition lives in a DWO file, this is the offset in the
669 .debug_types.dwo section.
670 The value is zero until the actual value is known.
671 Zero is otherwise not a valid section offset. */
672 sect_offset type_offset_in_section
;
674 /* Type units are grouped by their DW_AT_stmt_list entry so that they
675 can share them. This points to the containing symtab. */
676 struct type_unit_group
*type_unit_group
;
679 The first time we encounter this type we fully read it in and install it
680 in the symbol tables. Subsequent times we only need the type. */
683 /* Containing DWO unit.
684 This field is valid iff per_cu.reading_dwo_directly. */
685 struct dwo_unit
*dwo_unit
;
688 typedef struct signatured_type
*sig_type_ptr
;
689 DEF_VEC_P (sig_type_ptr
);
691 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
692 This includes type_unit_group and quick_file_names. */
694 struct stmt_list_hash
696 /* The DWO unit this table is from or NULL if there is none. */
697 struct dwo_unit
*dwo_unit
;
699 /* Offset in .debug_line or .debug_line.dwo. */
700 sect_offset line_offset
;
703 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
704 an object of this type. */
706 struct type_unit_group
708 /* dwarf2read.c's main "handle" on a TU symtab.
709 To simplify things we create an artificial CU that "includes" all the
710 type units using this stmt_list so that the rest of the code still has
711 a "per_cu" handle on the symtab.
712 This PER_CU is recognized by having no section. */
713 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
714 struct dwarf2_per_cu_data per_cu
;
716 /* The TUs that share this DW_AT_stmt_list entry.
717 This is added to while parsing type units to build partial symtabs,
718 and is deleted afterwards and not used again. */
719 VEC (sig_type_ptr
) *tus
;
721 /* The compunit symtab.
722 Type units in a group needn't all be defined in the same source file,
723 so we create an essentially anonymous symtab as the compunit symtab. */
724 struct compunit_symtab
*compunit_symtab
;
726 /* The data used to construct the hash key. */
727 struct stmt_list_hash hash
;
729 /* The number of symtabs from the line header.
730 The value here must match line_header.num_file_names. */
731 unsigned int num_symtabs
;
733 /* The symbol tables for this TU (obtained from the files listed in
735 WARNING: The order of entries here must match the order of entries
736 in the line header. After the first TU using this type_unit_group, the
737 line header for the subsequent TUs is recreated from this. This is done
738 because we need to use the same symtabs for each TU using the same
739 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
740 there's no guarantee the line header doesn't have duplicate entries. */
741 struct symtab
**symtabs
;
744 /* These sections are what may appear in a (real or virtual) DWO file. */
748 struct dwarf2_section_info abbrev
;
749 struct dwarf2_section_info line
;
750 struct dwarf2_section_info loc
;
751 struct dwarf2_section_info macinfo
;
752 struct dwarf2_section_info macro
;
753 struct dwarf2_section_info str
;
754 struct dwarf2_section_info str_offsets
;
755 /* In the case of a virtual DWO file, these two are unused. */
756 struct dwarf2_section_info info
;
757 VEC (dwarf2_section_info_def
) *types
;
760 /* CUs/TUs in DWP/DWO files. */
764 /* Backlink to the containing struct dwo_file. */
765 struct dwo_file
*dwo_file
;
767 /* The "id" that distinguishes this CU/TU.
768 .debug_info calls this "dwo_id", .debug_types calls this "signature".
769 Since signatures came first, we stick with it for consistency. */
772 /* The section this CU/TU lives in, in the DWO file. */
773 struct dwarf2_section_info
*section
;
775 /* Same as dwarf2_per_cu_data:{offset,length} but in the DWO section. */
779 /* For types, offset in the type's DIE of the type defined by this TU. */
780 cu_offset type_offset_in_tu
;
783 /* include/dwarf2.h defines the DWP section codes.
784 It defines a max value but it doesn't define a min value, which we
785 use for error checking, so provide one. */
787 enum dwp_v2_section_ids
792 /* Data for one DWO file.
794 This includes virtual DWO files (a virtual DWO file is a DWO file as it
795 appears in a DWP file). DWP files don't really have DWO files per se -
796 comdat folding of types "loses" the DWO file they came from, and from
797 a high level view DWP files appear to contain a mass of random types.
798 However, to maintain consistency with the non-DWP case we pretend DWP
799 files contain virtual DWO files, and we assign each TU with one virtual
800 DWO file (generally based on the line and abbrev section offsets -
801 a heuristic that seems to work in practice). */
805 /* The DW_AT_GNU_dwo_name attribute.
806 For virtual DWO files the name is constructed from the section offsets
807 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
808 from related CU+TUs. */
809 const char *dwo_name
;
811 /* The DW_AT_comp_dir attribute. */
812 const char *comp_dir
;
814 /* The bfd, when the file is open. Otherwise this is NULL.
815 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
818 /* The sections that make up this DWO file.
819 Remember that for virtual DWO files in DWP V2, these are virtual
820 sections (for lack of a better name). */
821 struct dwo_sections sections
;
823 /* The CU in the file.
824 We only support one because having more than one requires hacking the
825 dwo_name of each to match, which is highly unlikely to happen.
826 Doing this means all TUs can share comp_dir: We also assume that
827 DW_AT_comp_dir across all TUs in a DWO file will be identical. */
830 /* Table of TUs in the file.
831 Each element is a struct dwo_unit. */
835 /* These sections are what may appear in a DWP file. */
839 /* These are used by both DWP version 1 and 2. */
840 struct dwarf2_section_info str
;
841 struct dwarf2_section_info cu_index
;
842 struct dwarf2_section_info tu_index
;
844 /* These are only used by DWP version 2 files.
845 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
846 sections are referenced by section number, and are not recorded here.
847 In DWP version 2 there is at most one copy of all these sections, each
848 section being (effectively) comprised of the concatenation of all of the
849 individual sections that exist in the version 1 format.
850 To keep the code simple we treat each of these concatenated pieces as a
851 section itself (a virtual section?). */
852 struct dwarf2_section_info abbrev
;
853 struct dwarf2_section_info info
;
854 struct dwarf2_section_info line
;
855 struct dwarf2_section_info loc
;
856 struct dwarf2_section_info macinfo
;
857 struct dwarf2_section_info macro
;
858 struct dwarf2_section_info str_offsets
;
859 struct dwarf2_section_info types
;
862 /* These sections are what may appear in a virtual DWO file in DWP version 1.
863 A virtual DWO file is a DWO file as it appears in a DWP file. */
865 struct virtual_v1_dwo_sections
867 struct dwarf2_section_info abbrev
;
868 struct dwarf2_section_info line
;
869 struct dwarf2_section_info loc
;
870 struct dwarf2_section_info macinfo
;
871 struct dwarf2_section_info macro
;
872 struct dwarf2_section_info str_offsets
;
873 /* Each DWP hash table entry records one CU or one TU.
874 That is recorded here, and copied to dwo_unit.section. */
875 struct dwarf2_section_info info_or_types
;
878 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
879 In version 2, the sections of the DWO files are concatenated together
880 and stored in one section of that name. Thus each ELF section contains
881 several "virtual" sections. */
883 struct virtual_v2_dwo_sections
885 bfd_size_type abbrev_offset
;
886 bfd_size_type abbrev_size
;
888 bfd_size_type line_offset
;
889 bfd_size_type line_size
;
891 bfd_size_type loc_offset
;
892 bfd_size_type loc_size
;
894 bfd_size_type macinfo_offset
;
895 bfd_size_type macinfo_size
;
897 bfd_size_type macro_offset
;
898 bfd_size_type macro_size
;
900 bfd_size_type str_offsets_offset
;
901 bfd_size_type str_offsets_size
;
903 /* Each DWP hash table entry records one CU or one TU.
904 That is recorded here, and copied to dwo_unit.section. */
905 bfd_size_type info_or_types_offset
;
906 bfd_size_type info_or_types_size
;
909 /* Contents of DWP hash tables. */
911 struct dwp_hash_table
913 uint32_t version
, nr_columns
;
914 uint32_t nr_units
, nr_slots
;
915 const gdb_byte
*hash_table
, *unit_table
;
920 const gdb_byte
*indices
;
924 /* This is indexed by column number and gives the id of the section
926 #define MAX_NR_V2_DWO_SECTIONS \
927 (1 /* .debug_info or .debug_types */ \
928 + 1 /* .debug_abbrev */ \
929 + 1 /* .debug_line */ \
930 + 1 /* .debug_loc */ \
931 + 1 /* .debug_str_offsets */ \
932 + 1 /* .debug_macro or .debug_macinfo */)
933 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
934 const gdb_byte
*offsets
;
935 const gdb_byte
*sizes
;
940 /* Data for one DWP file. */
944 /* Name of the file. */
947 /* File format version. */
953 /* Section info for this file. */
954 struct dwp_sections sections
;
956 /* Table of CUs in the file. */
957 const struct dwp_hash_table
*cus
;
959 /* Table of TUs in the file. */
960 const struct dwp_hash_table
*tus
;
962 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
966 /* Table to map ELF section numbers to their sections.
967 This is only needed for the DWP V1 file format. */
968 unsigned int num_sections
;
969 asection
**elf_sections
;
972 /* This represents a '.dwz' file. */
976 /* A dwz file can only contain a few sections. */
977 struct dwarf2_section_info abbrev
;
978 struct dwarf2_section_info info
;
979 struct dwarf2_section_info str
;
980 struct dwarf2_section_info line
;
981 struct dwarf2_section_info macro
;
982 struct dwarf2_section_info gdb_index
;
988 /* Struct used to pass misc. parameters to read_die_and_children, et
989 al. which are used for both .debug_info and .debug_types dies.
990 All parameters here are unchanging for the life of the call. This
991 struct exists to abstract away the constant parameters of die reading. */
993 struct die_reader_specs
995 /* The bfd of die_section. */
998 /* The CU of the DIE we are parsing. */
999 struct dwarf2_cu
*cu
;
1001 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1002 struct dwo_file
*dwo_file
;
1004 /* The section the die comes from.
1005 This is either .debug_info or .debug_types, or the .dwo variants. */
1006 struct dwarf2_section_info
*die_section
;
1008 /* die_section->buffer. */
1009 const gdb_byte
*buffer
;
1011 /* The end of the buffer. */
1012 const gdb_byte
*buffer_end
;
1014 /* The value of the DW_AT_comp_dir attribute. */
1015 const char *comp_dir
;
1018 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1019 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1020 const gdb_byte
*info_ptr
,
1021 struct die_info
*comp_unit_die
,
1025 /* The line number information for a compilation unit (found in the
1026 .debug_line section) begins with a "statement program header",
1027 which contains the following information. */
1030 /* Offset of line number information in .debug_line section. */
1033 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1034 unsigned offset_in_dwz
: 1;
1036 unsigned int total_length
;
1037 unsigned short version
;
1038 unsigned int header_length
;
1039 unsigned char minimum_instruction_length
;
1040 unsigned char maximum_ops_per_instruction
;
1041 unsigned char default_is_stmt
;
1043 unsigned char line_range
;
1044 unsigned char opcode_base
;
1046 /* standard_opcode_lengths[i] is the number of operands for the
1047 standard opcode whose value is i. This means that
1048 standard_opcode_lengths[0] is unused, and the last meaningful
1049 element is standard_opcode_lengths[opcode_base - 1]. */
1050 unsigned char *standard_opcode_lengths
;
1052 /* The include_directories table. NOTE! These strings are not
1053 allocated with xmalloc; instead, they are pointers into
1054 debug_line_buffer. If you try to free them, `free' will get
1056 unsigned int num_include_dirs
, include_dirs_size
;
1057 const char **include_dirs
;
1059 /* The file_names table. NOTE! These strings are not allocated
1060 with xmalloc; instead, they are pointers into debug_line_buffer.
1061 Don't try to free them directly. */
1062 unsigned int num_file_names
, file_names_size
;
1066 unsigned int dir_index
;
1067 unsigned int mod_time
;
1068 unsigned int length
;
1069 int included_p
; /* Non-zero if referenced by the Line Number Program. */
1070 struct symtab
*symtab
; /* The associated symbol table, if any. */
1073 /* The start and end of the statement program following this
1074 header. These point into dwarf2_per_objfile->line_buffer. */
1075 const gdb_byte
*statement_program_start
, *statement_program_end
;
1078 /* When we construct a partial symbol table entry we only
1079 need this much information. */
1080 struct partial_die_info
1082 /* Offset of this DIE. */
1085 /* DWARF-2 tag for this DIE. */
1086 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1088 /* Assorted flags describing the data found in this DIE. */
1089 unsigned int has_children
: 1;
1090 unsigned int is_external
: 1;
1091 unsigned int is_declaration
: 1;
1092 unsigned int has_type
: 1;
1093 unsigned int has_specification
: 1;
1094 unsigned int has_pc_info
: 1;
1095 unsigned int may_be_inlined
: 1;
1097 /* Flag set if the SCOPE field of this structure has been
1099 unsigned int scope_set
: 1;
1101 /* Flag set if the DIE has a byte_size attribute. */
1102 unsigned int has_byte_size
: 1;
1104 /* Flag set if any of the DIE's children are template arguments. */
1105 unsigned int has_template_arguments
: 1;
1107 /* Flag set if fixup_partial_die has been called on this die. */
1108 unsigned int fixup_called
: 1;
1110 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1111 unsigned int is_dwz
: 1;
1113 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1114 unsigned int spec_is_dwz
: 1;
1116 /* The name of this DIE. Normally the value of DW_AT_name, but
1117 sometimes a default name for unnamed DIEs. */
1120 /* The linkage name, if present. */
1121 const char *linkage_name
;
1123 /* The scope to prepend to our children. This is generally
1124 allocated on the comp_unit_obstack, so will disappear
1125 when this compilation unit leaves the cache. */
1128 /* Some data associated with the partial DIE. The tag determines
1129 which field is live. */
1132 /* The location description associated with this DIE, if any. */
1133 struct dwarf_block
*locdesc
;
1134 /* The offset of an import, for DW_TAG_imported_unit. */
1138 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1142 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1143 DW_AT_sibling, if any. */
1144 /* NOTE: This member isn't strictly necessary, read_partial_die could
1145 return DW_AT_sibling values to its caller load_partial_dies. */
1146 const gdb_byte
*sibling
;
1148 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1149 DW_AT_specification (or DW_AT_abstract_origin or
1150 DW_AT_extension). */
1151 sect_offset spec_offset
;
1153 /* Pointers to this DIE's parent, first child, and next sibling,
1155 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1158 /* This data structure holds the information of an abbrev. */
1161 unsigned int number
; /* number identifying abbrev */
1162 enum dwarf_tag tag
; /* dwarf tag */
1163 unsigned short has_children
; /* boolean */
1164 unsigned short num_attrs
; /* number of attributes */
1165 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1166 struct abbrev_info
*next
; /* next in chain */
1171 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1172 ENUM_BITFIELD(dwarf_form
) form
: 16;
1175 /* Size of abbrev_table.abbrev_hash_table. */
1176 #define ABBREV_HASH_SIZE 121
1178 /* Top level data structure to contain an abbreviation table. */
1182 /* Where the abbrev table came from.
1183 This is used as a sanity check when the table is used. */
1186 /* Storage for the abbrev table. */
1187 struct obstack abbrev_obstack
;
1189 /* Hash table of abbrevs.
1190 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1191 It could be statically allocated, but the previous code didn't so we
1193 struct abbrev_info
**abbrevs
;
1196 /* Attributes have a name and a value. */
1199 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1200 ENUM_BITFIELD(dwarf_form
) form
: 15;
1202 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1203 field should be in u.str (existing only for DW_STRING) but it is kept
1204 here for better struct attribute alignment. */
1205 unsigned int string_is_canonical
: 1;
1210 struct dwarf_block
*blk
;
1219 /* This data structure holds a complete die structure. */
1222 /* DWARF-2 tag for this DIE. */
1223 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1225 /* Number of attributes */
1226 unsigned char num_attrs
;
1228 /* True if we're presently building the full type name for the
1229 type derived from this DIE. */
1230 unsigned char building_fullname
: 1;
1232 /* True if this die is in process. PR 16581. */
1233 unsigned char in_process
: 1;
1236 unsigned int abbrev
;
1238 /* Offset in .debug_info or .debug_types section. */
1241 /* The dies in a compilation unit form an n-ary tree. PARENT
1242 points to this die's parent; CHILD points to the first child of
1243 this node; and all the children of a given node are chained
1244 together via their SIBLING fields. */
1245 struct die_info
*child
; /* Its first child, if any. */
1246 struct die_info
*sibling
; /* Its next sibling, if any. */
1247 struct die_info
*parent
; /* Its parent, if any. */
1249 /* An array of attributes, with NUM_ATTRS elements. There may be
1250 zero, but it's not common and zero-sized arrays are not
1251 sufficiently portable C. */
1252 struct attribute attrs
[1];
1255 /* Get at parts of an attribute structure. */
1257 #define DW_STRING(attr) ((attr)->u.str)
1258 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1259 #define DW_UNSND(attr) ((attr)->u.unsnd)
1260 #define DW_BLOCK(attr) ((attr)->u.blk)
1261 #define DW_SND(attr) ((attr)->u.snd)
1262 #define DW_ADDR(attr) ((attr)->u.addr)
1263 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1265 /* Blocks are a bunch of untyped bytes. */
1270 /* Valid only if SIZE is not zero. */
1271 const gdb_byte
*data
;
1274 #ifndef ATTR_ALLOC_CHUNK
1275 #define ATTR_ALLOC_CHUNK 4
1278 /* Allocate fields for structs, unions and enums in this size. */
1279 #ifndef DW_FIELD_ALLOC_CHUNK
1280 #define DW_FIELD_ALLOC_CHUNK 4
1283 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1284 but this would require a corresponding change in unpack_field_as_long
1286 static int bits_per_byte
= 8;
1288 /* The routines that read and process dies for a C struct or C++ class
1289 pass lists of data member fields and lists of member function fields
1290 in an instance of a field_info structure, as defined below. */
1293 /* List of data member and baseclasses fields. */
1296 struct nextfield
*next
;
1301 *fields
, *baseclasses
;
1303 /* Number of fields (including baseclasses). */
1306 /* Number of baseclasses. */
1309 /* Set if the accesibility of one of the fields is not public. */
1310 int non_public_fields
;
1312 /* Member function fields array, entries are allocated in the order they
1313 are encountered in the object file. */
1316 struct nextfnfield
*next
;
1317 struct fn_field fnfield
;
1321 /* Member function fieldlist array, contains name of possibly overloaded
1322 member function, number of overloaded member functions and a pointer
1323 to the head of the member function field chain. */
1328 struct nextfnfield
*head
;
1332 /* Number of entries in the fnfieldlists array. */
1335 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1336 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1337 struct typedef_field_list
1339 struct typedef_field field
;
1340 struct typedef_field_list
*next
;
1342 *typedef_field_list
;
1343 unsigned typedef_field_list_count
;
1346 /* One item on the queue of compilation units to read in full symbols
1348 struct dwarf2_queue_item
1350 struct dwarf2_per_cu_data
*per_cu
;
1351 enum language pretend_language
;
1352 struct dwarf2_queue_item
*next
;
1355 /* The current queue. */
1356 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1358 /* Loaded secondary compilation units are kept in memory until they
1359 have not been referenced for the processing of this many
1360 compilation units. Set this to zero to disable caching. Cache
1361 sizes of up to at least twenty will improve startup time for
1362 typical inter-CU-reference binaries, at an obvious memory cost. */
1363 static int dwarf2_max_cache_age
= 5;
1365 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1366 struct cmd_list_element
*c
, const char *value
)
1368 fprintf_filtered (file
, _("The upper bound on the age of cached "
1369 "dwarf2 compilation units is %s.\n"),
1373 /* local function prototypes */
1375 static const char *get_section_name (const struct dwarf2_section_info
*);
1377 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1379 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1381 static void dwarf2_find_base_address (struct die_info
*die
,
1382 struct dwarf2_cu
*cu
);
1384 static struct partial_symtab
*create_partial_symtab
1385 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1387 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1389 static void scan_partial_symbols (struct partial_die_info
*,
1390 CORE_ADDR
*, CORE_ADDR
*,
1391 int, struct dwarf2_cu
*);
1393 static void add_partial_symbol (struct partial_die_info
*,
1394 struct dwarf2_cu
*);
1396 static void add_partial_namespace (struct partial_die_info
*pdi
,
1397 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1398 int set_addrmap
, struct dwarf2_cu
*cu
);
1400 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1401 CORE_ADDR
*highpc
, int set_addrmap
,
1402 struct dwarf2_cu
*cu
);
1404 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1405 struct dwarf2_cu
*cu
);
1407 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1408 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1409 int need_pc
, struct dwarf2_cu
*cu
);
1411 static void dwarf2_read_symtab (struct partial_symtab
*,
1414 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1416 static struct abbrev_info
*abbrev_table_lookup_abbrev
1417 (const struct abbrev_table
*, unsigned int);
1419 static struct abbrev_table
*abbrev_table_read_table
1420 (struct dwarf2_section_info
*, sect_offset
);
1422 static void abbrev_table_free (struct abbrev_table
*);
1424 static void abbrev_table_free_cleanup (void *);
1426 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1427 struct dwarf2_section_info
*);
1429 static void dwarf2_free_abbrev_table (void *);
1431 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1433 static struct partial_die_info
*load_partial_dies
1434 (const struct die_reader_specs
*, const gdb_byte
*, int);
1436 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1437 struct partial_die_info
*,
1438 struct abbrev_info
*,
1442 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1443 struct dwarf2_cu
*);
1445 static void fixup_partial_die (struct partial_die_info
*,
1446 struct dwarf2_cu
*);
1448 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1449 struct attribute
*, struct attr_abbrev
*,
1452 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1454 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1456 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1458 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1460 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1462 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1465 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1467 static LONGEST read_checked_initial_length_and_offset
1468 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1469 unsigned int *, unsigned int *);
1471 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1472 const struct comp_unit_head
*,
1475 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1477 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1480 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1482 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1484 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1485 const struct comp_unit_head
*,
1488 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1490 static ULONGEST
read_unsigned_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1492 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1494 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1498 static const char *read_str_index (const struct die_reader_specs
*reader
,
1499 ULONGEST str_index
);
1501 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1503 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1504 struct dwarf2_cu
*);
1506 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1509 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1510 struct dwarf2_cu
*cu
);
1512 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1514 static struct die_info
*die_specification (struct die_info
*die
,
1515 struct dwarf2_cu
**);
1517 static void free_line_header (struct line_header
*lh
);
1519 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1520 struct dwarf2_cu
*cu
);
1522 static void dwarf_decode_lines (struct line_header
*, const char *,
1523 struct dwarf2_cu
*, struct partial_symtab
*,
1524 CORE_ADDR
, int decode_mapping
);
1526 static void dwarf2_start_subfile (const char *, const char *);
1528 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1529 const char *, const char *,
1532 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1533 struct dwarf2_cu
*);
1535 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1536 struct dwarf2_cu
*, struct symbol
*);
1538 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1539 struct dwarf2_cu
*);
1541 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1544 struct obstack
*obstack
,
1545 struct dwarf2_cu
*cu
, LONGEST
*value
,
1546 const gdb_byte
**bytes
,
1547 struct dwarf2_locexpr_baton
**baton
);
1549 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1551 static int need_gnat_info (struct dwarf2_cu
*);
1553 static struct type
*die_descriptive_type (struct die_info
*,
1554 struct dwarf2_cu
*);
1556 static void set_descriptive_type (struct type
*, struct die_info
*,
1557 struct dwarf2_cu
*);
1559 static struct type
*die_containing_type (struct die_info
*,
1560 struct dwarf2_cu
*);
1562 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1563 struct dwarf2_cu
*);
1565 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1567 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1569 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1571 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1572 const char *suffix
, int physname
,
1573 struct dwarf2_cu
*cu
);
1575 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1577 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1579 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1581 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1583 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1585 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1586 struct dwarf2_cu
*, struct partial_symtab
*);
1588 static int dwarf2_get_pc_bounds (struct die_info
*,
1589 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1590 struct partial_symtab
*);
1592 static void get_scope_pc_bounds (struct die_info
*,
1593 CORE_ADDR
*, CORE_ADDR
*,
1594 struct dwarf2_cu
*);
1596 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1597 CORE_ADDR
, struct dwarf2_cu
*);
1599 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1600 struct dwarf2_cu
*);
1602 static void dwarf2_attach_fields_to_type (struct field_info
*,
1603 struct type
*, struct dwarf2_cu
*);
1605 static void dwarf2_add_member_fn (struct field_info
*,
1606 struct die_info
*, struct type
*,
1607 struct dwarf2_cu
*);
1609 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1611 struct dwarf2_cu
*);
1613 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1615 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1617 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1619 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1621 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1623 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1625 static struct type
*read_module_type (struct die_info
*die
,
1626 struct dwarf2_cu
*cu
);
1628 static const char *namespace_name (struct die_info
*die
,
1629 int *is_anonymous
, struct dwarf2_cu
*);
1631 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1633 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1635 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1636 struct dwarf2_cu
*);
1638 static struct die_info
*read_die_and_siblings_1
1639 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1642 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1643 const gdb_byte
*info_ptr
,
1644 const gdb_byte
**new_info_ptr
,
1645 struct die_info
*parent
);
1647 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1648 struct die_info
**, const gdb_byte
*,
1651 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1652 struct die_info
**, const gdb_byte
*,
1655 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1657 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1660 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1662 static const char *dwarf2_full_name (const char *name
,
1663 struct die_info
*die
,
1664 struct dwarf2_cu
*cu
);
1666 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1667 struct dwarf2_cu
*cu
);
1669 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1670 struct dwarf2_cu
**);
1672 static const char *dwarf_tag_name (unsigned int);
1674 static const char *dwarf_attr_name (unsigned int);
1676 static const char *dwarf_form_name (unsigned int);
1678 static char *dwarf_bool_name (unsigned int);
1680 static const char *dwarf_type_encoding_name (unsigned int);
1682 static struct die_info
*sibling_die (struct die_info
*);
1684 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1686 static void dump_die_for_error (struct die_info
*);
1688 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1691 /*static*/ void dump_die (struct die_info
*, int max_level
);
1693 static void store_in_ref_table (struct die_info
*,
1694 struct dwarf2_cu
*);
1696 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1698 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1700 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1701 const struct attribute
*,
1702 struct dwarf2_cu
**);
1704 static struct die_info
*follow_die_ref (struct die_info
*,
1705 const struct attribute
*,
1706 struct dwarf2_cu
**);
1708 static struct die_info
*follow_die_sig (struct die_info
*,
1709 const struct attribute
*,
1710 struct dwarf2_cu
**);
1712 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1713 struct dwarf2_cu
*);
1715 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1716 const struct attribute
*,
1717 struct dwarf2_cu
*);
1719 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1721 static void read_signatured_type (struct signatured_type
*);
1723 /* memory allocation interface */
1725 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1727 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1729 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1731 static int attr_form_is_block (const struct attribute
*);
1733 static int attr_form_is_section_offset (const struct attribute
*);
1735 static int attr_form_is_constant (const struct attribute
*);
1737 static int attr_form_is_ref (const struct attribute
*);
1739 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1740 struct dwarf2_loclist_baton
*baton
,
1741 const struct attribute
*attr
);
1743 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1745 struct dwarf2_cu
*cu
,
1748 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1749 const gdb_byte
*info_ptr
,
1750 struct abbrev_info
*abbrev
);
1752 static void free_stack_comp_unit (void *);
1754 static hashval_t
partial_die_hash (const void *item
);
1756 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1758 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1759 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1761 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1762 struct dwarf2_per_cu_data
*per_cu
);
1764 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1765 struct die_info
*comp_unit_die
,
1766 enum language pretend_language
);
1768 static void free_heap_comp_unit (void *);
1770 static void free_cached_comp_units (void *);
1772 static void age_cached_comp_units (void);
1774 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1776 static struct type
*set_die_type (struct die_info
*, struct type
*,
1777 struct dwarf2_cu
*);
1779 static void create_all_comp_units (struct objfile
*);
1781 static int create_all_type_units (struct objfile
*);
1783 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1786 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1789 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1792 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1793 struct dwarf2_per_cu_data
*);
1795 static void dwarf2_mark (struct dwarf2_cu
*);
1797 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1799 static struct type
*get_die_type_at_offset (sect_offset
,
1800 struct dwarf2_per_cu_data
*);
1802 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1804 static void dwarf2_release_queue (void *dummy
);
1806 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1807 enum language pretend_language
);
1809 static void process_queue (void);
1811 static void find_file_and_directory (struct die_info
*die
,
1812 struct dwarf2_cu
*cu
,
1813 const char **name
, const char **comp_dir
);
1815 static char *file_full_name (int file
, struct line_header
*lh
,
1816 const char *comp_dir
);
1818 static const gdb_byte
*read_and_check_comp_unit_head
1819 (struct comp_unit_head
*header
,
1820 struct dwarf2_section_info
*section
,
1821 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1822 int is_debug_types_section
);
1824 static void init_cutu_and_read_dies
1825 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1826 int use_existing_cu
, int keep
,
1827 die_reader_func_ftype
*die_reader_func
, void *data
);
1829 static void init_cutu_and_read_dies_simple
1830 (struct dwarf2_per_cu_data
*this_cu
,
1831 die_reader_func_ftype
*die_reader_func
, void *data
);
1833 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1835 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1837 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1838 (struct dwp_file
*dwp_file
, const char *comp_dir
,
1839 ULONGEST signature
, int is_debug_types
);
1841 static struct dwp_file
*get_dwp_file (void);
1843 static struct dwo_unit
*lookup_dwo_comp_unit
1844 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1846 static struct dwo_unit
*lookup_dwo_type_unit
1847 (struct signatured_type
*, const char *, const char *);
1849 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1851 static void free_dwo_file_cleanup (void *);
1853 static void process_cu_includes (void);
1855 static void check_producer (struct dwarf2_cu
*cu
);
1857 static void free_line_header_voidp (void *arg
);
1859 /* Various complaints about symbol reading that don't abort the process. */
1862 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1864 complaint (&symfile_complaints
,
1865 _("statement list doesn't fit in .debug_line section"));
1869 dwarf2_debug_line_missing_file_complaint (void)
1871 complaint (&symfile_complaints
,
1872 _(".debug_line section has line data without a file"));
1876 dwarf2_debug_line_missing_end_sequence_complaint (void)
1878 complaint (&symfile_complaints
,
1879 _(".debug_line section has line "
1880 "program sequence without an end"));
1884 dwarf2_complex_location_expr_complaint (void)
1886 complaint (&symfile_complaints
, _("location expression too complex"));
1890 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1893 complaint (&symfile_complaints
,
1894 _("const value length mismatch for '%s', got %d, expected %d"),
1899 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1901 complaint (&symfile_complaints
,
1902 _("debug info runs off end of %s section"
1904 get_section_name (section
),
1905 get_section_file_name (section
));
1909 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1911 complaint (&symfile_complaints
,
1912 _("macro debug info contains a "
1913 "malformed macro definition:\n`%s'"),
1918 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1920 complaint (&symfile_complaints
,
1921 _("invalid attribute class or form for '%s' in '%s'"),
1925 /* Hash function for line_header_hash. */
1928 line_header_hash (const struct line_header
*ofs
)
1930 return ofs
->offset
.sect_off
^ ofs
->offset_in_dwz
;
1933 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1936 line_header_hash_voidp (const void *item
)
1938 const struct line_header
*ofs
= item
;
1940 return line_header_hash (ofs
);
1943 /* Equality function for line_header_hash. */
1946 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1948 const struct line_header
*ofs_lhs
= item_lhs
;
1949 const struct line_header
*ofs_rhs
= item_rhs
;
1951 return (ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
1952 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1958 /* Convert VALUE between big- and little-endian. */
1960 byte_swap (offset_type value
)
1964 result
= (value
& 0xff) << 24;
1965 result
|= (value
& 0xff00) << 8;
1966 result
|= (value
& 0xff0000) >> 8;
1967 result
|= (value
& 0xff000000) >> 24;
1971 #define MAYBE_SWAP(V) byte_swap (V)
1974 #define MAYBE_SWAP(V) (V)
1975 #endif /* WORDS_BIGENDIAN */
1977 /* Read the given attribute value as an address, taking the attribute's
1978 form into account. */
1981 attr_value_as_address (struct attribute
*attr
)
1985 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
1987 /* Aside from a few clearly defined exceptions, attributes that
1988 contain an address must always be in DW_FORM_addr form.
1989 Unfortunately, some compilers happen to be violating this
1990 requirement by encoding addresses using other forms, such
1991 as DW_FORM_data4 for example. For those broken compilers,
1992 we try to do our best, without any guarantee of success,
1993 to interpret the address correctly. It would also be nice
1994 to generate a complaint, but that would require us to maintain
1995 a list of legitimate cases where a non-address form is allowed,
1996 as well as update callers to pass in at least the CU's DWARF
1997 version. This is more overhead than what we're willing to
1998 expand for a pretty rare case. */
1999 addr
= DW_UNSND (attr
);
2002 addr
= DW_ADDR (attr
);
2007 /* The suffix for an index file. */
2008 #define INDEX_SUFFIX ".gdb-index"
2010 /* Try to locate the sections we need for DWARF 2 debugging
2011 information and return true if we have enough to do something.
2012 NAMES points to the dwarf2 section names, or is NULL if the standard
2013 ELF names are used. */
2016 dwarf2_has_info (struct objfile
*objfile
,
2017 const struct dwarf2_debug_sections
*names
)
2019 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2020 if (!dwarf2_per_objfile
)
2022 /* Initialize per-objfile state. */
2023 struct dwarf2_per_objfile
*data
2024 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
2026 memset (data
, 0, sizeof (*data
));
2027 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
2028 dwarf2_per_objfile
= data
;
2030 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
2032 dwarf2_per_objfile
->objfile
= objfile
;
2034 return (!dwarf2_per_objfile
->info
.is_virtual
2035 && dwarf2_per_objfile
->info
.s
.asection
!= NULL
2036 && !dwarf2_per_objfile
->abbrev
.is_virtual
2037 && dwarf2_per_objfile
->abbrev
.s
.asection
!= NULL
);
2040 /* Return the containing section of virtual section SECTION. */
2042 static struct dwarf2_section_info
*
2043 get_containing_section (const struct dwarf2_section_info
*section
)
2045 gdb_assert (section
->is_virtual
);
2046 return section
->s
.containing_section
;
2049 /* Return the bfd owner of SECTION. */
2052 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2054 if (section
->is_virtual
)
2056 section
= get_containing_section (section
);
2057 gdb_assert (!section
->is_virtual
);
2059 return section
->s
.asection
->owner
;
2062 /* Return the bfd section of SECTION.
2063 Returns NULL if the section is not present. */
2066 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2068 if (section
->is_virtual
)
2070 section
= get_containing_section (section
);
2071 gdb_assert (!section
->is_virtual
);
2073 return section
->s
.asection
;
2076 /* Return the name of SECTION. */
2079 get_section_name (const struct dwarf2_section_info
*section
)
2081 asection
*sectp
= get_section_bfd_section (section
);
2083 gdb_assert (sectp
!= NULL
);
2084 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2087 /* Return the name of the file SECTION is in. */
2090 get_section_file_name (const struct dwarf2_section_info
*section
)
2092 bfd
*abfd
= get_section_bfd_owner (section
);
2094 return bfd_get_filename (abfd
);
2097 /* Return the id of SECTION.
2098 Returns 0 if SECTION doesn't exist. */
2101 get_section_id (const struct dwarf2_section_info
*section
)
2103 asection
*sectp
= get_section_bfd_section (section
);
2110 /* Return the flags of SECTION.
2111 SECTION (or containing section if this is a virtual section) must exist. */
2114 get_section_flags (const struct dwarf2_section_info
*section
)
2116 asection
*sectp
= get_section_bfd_section (section
);
2118 gdb_assert (sectp
!= NULL
);
2119 return bfd_get_section_flags (sectp
->owner
, sectp
);
2122 /* When loading sections, we look either for uncompressed section or for
2123 compressed section names. */
2126 section_is_p (const char *section_name
,
2127 const struct dwarf2_section_names
*names
)
2129 if (names
->normal
!= NULL
2130 && strcmp (section_name
, names
->normal
) == 0)
2132 if (names
->compressed
!= NULL
2133 && strcmp (section_name
, names
->compressed
) == 0)
2138 /* This function is mapped across the sections and remembers the
2139 offset and size of each of the debugging sections we are interested
2143 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
2145 const struct dwarf2_debug_sections
*names
;
2146 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2149 names
= &dwarf2_elf_names
;
2151 names
= (const struct dwarf2_debug_sections
*) vnames
;
2153 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2156 else if (section_is_p (sectp
->name
, &names
->info
))
2158 dwarf2_per_objfile
->info
.s
.asection
= sectp
;
2159 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
2161 else if (section_is_p (sectp
->name
, &names
->abbrev
))
2163 dwarf2_per_objfile
->abbrev
.s
.asection
= sectp
;
2164 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
2166 else if (section_is_p (sectp
->name
, &names
->line
))
2168 dwarf2_per_objfile
->line
.s
.asection
= sectp
;
2169 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
2171 else if (section_is_p (sectp
->name
, &names
->loc
))
2173 dwarf2_per_objfile
->loc
.s
.asection
= sectp
;
2174 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
2176 else if (section_is_p (sectp
->name
, &names
->macinfo
))
2178 dwarf2_per_objfile
->macinfo
.s
.asection
= sectp
;
2179 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
2181 else if (section_is_p (sectp
->name
, &names
->macro
))
2183 dwarf2_per_objfile
->macro
.s
.asection
= sectp
;
2184 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
2186 else if (section_is_p (sectp
->name
, &names
->str
))
2188 dwarf2_per_objfile
->str
.s
.asection
= sectp
;
2189 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
2191 else if (section_is_p (sectp
->name
, &names
->addr
))
2193 dwarf2_per_objfile
->addr
.s
.asection
= sectp
;
2194 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
2196 else if (section_is_p (sectp
->name
, &names
->frame
))
2198 dwarf2_per_objfile
->frame
.s
.asection
= sectp
;
2199 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
2201 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
2203 dwarf2_per_objfile
->eh_frame
.s
.asection
= sectp
;
2204 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
2206 else if (section_is_p (sectp
->name
, &names
->ranges
))
2208 dwarf2_per_objfile
->ranges
.s
.asection
= sectp
;
2209 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
2211 else if (section_is_p (sectp
->name
, &names
->types
))
2213 struct dwarf2_section_info type_section
;
2215 memset (&type_section
, 0, sizeof (type_section
));
2216 type_section
.s
.asection
= sectp
;
2217 type_section
.size
= bfd_get_section_size (sectp
);
2219 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
2222 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
2224 dwarf2_per_objfile
->gdb_index
.s
.asection
= sectp
;
2225 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
2228 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
2229 && bfd_section_vma (abfd
, sectp
) == 0)
2230 dwarf2_per_objfile
->has_section_at_zero
= 1;
2233 /* A helper function that decides whether a section is empty,
2237 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2239 if (section
->is_virtual
)
2240 return section
->size
== 0;
2241 return section
->s
.asection
== NULL
|| section
->size
== 0;
2244 /* Read the contents of the section INFO.
2245 OBJFILE is the main object file, but not necessarily the file where
2246 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2248 If the section is compressed, uncompress it before returning. */
2251 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2255 gdb_byte
*buf
, *retbuf
;
2259 info
->buffer
= NULL
;
2262 if (dwarf2_section_empty_p (info
))
2265 sectp
= get_section_bfd_section (info
);
2267 /* If this is a virtual section we need to read in the real one first. */
2268 if (info
->is_virtual
)
2270 struct dwarf2_section_info
*containing_section
=
2271 get_containing_section (info
);
2273 gdb_assert (sectp
!= NULL
);
2274 if ((sectp
->flags
& SEC_RELOC
) != 0)
2276 error (_("Dwarf Error: DWP format V2 with relocations is not"
2277 " supported in section %s [in module %s]"),
2278 get_section_name (info
), get_section_file_name (info
));
2280 dwarf2_read_section (objfile
, containing_section
);
2281 /* Other code should have already caught virtual sections that don't
2283 gdb_assert (info
->virtual_offset
+ info
->size
2284 <= containing_section
->size
);
2285 /* If the real section is empty or there was a problem reading the
2286 section we shouldn't get here. */
2287 gdb_assert (containing_section
->buffer
!= NULL
);
2288 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2292 /* If the section has relocations, we must read it ourselves.
2293 Otherwise we attach it to the BFD. */
2294 if ((sectp
->flags
& SEC_RELOC
) == 0)
2296 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2300 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2303 /* When debugging .o files, we may need to apply relocations; see
2304 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2305 We never compress sections in .o files, so we only need to
2306 try this when the section is not compressed. */
2307 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2310 info
->buffer
= retbuf
;
2314 abfd
= get_section_bfd_owner (info
);
2315 gdb_assert (abfd
!= NULL
);
2317 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2318 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2320 error (_("Dwarf Error: Can't read DWARF data"
2321 " in section %s [in module %s]"),
2322 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2326 /* A helper function that returns the size of a section in a safe way.
2327 If you are positive that the section has been read before using the
2328 size, then it is safe to refer to the dwarf2_section_info object's
2329 "size" field directly. In other cases, you must call this
2330 function, because for compressed sections the size field is not set
2331 correctly until the section has been read. */
2333 static bfd_size_type
2334 dwarf2_section_size (struct objfile
*objfile
,
2335 struct dwarf2_section_info
*info
)
2338 dwarf2_read_section (objfile
, info
);
2342 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2346 dwarf2_get_section_info (struct objfile
*objfile
,
2347 enum dwarf2_section_enum sect
,
2348 asection
**sectp
, const gdb_byte
**bufp
,
2349 bfd_size_type
*sizep
)
2351 struct dwarf2_per_objfile
*data
2352 = objfile_data (objfile
, dwarf2_objfile_data_key
);
2353 struct dwarf2_section_info
*info
;
2355 /* We may see an objfile without any DWARF, in which case we just
2366 case DWARF2_DEBUG_FRAME
:
2367 info
= &data
->frame
;
2369 case DWARF2_EH_FRAME
:
2370 info
= &data
->eh_frame
;
2373 gdb_assert_not_reached ("unexpected section");
2376 dwarf2_read_section (objfile
, info
);
2378 *sectp
= get_section_bfd_section (info
);
2379 *bufp
= info
->buffer
;
2380 *sizep
= info
->size
;
2383 /* A helper function to find the sections for a .dwz file. */
2386 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2388 struct dwz_file
*dwz_file
= arg
;
2390 /* Note that we only support the standard ELF names, because .dwz
2391 is ELF-only (at the time of writing). */
2392 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2394 dwz_file
->abbrev
.s
.asection
= sectp
;
2395 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2397 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2399 dwz_file
->info
.s
.asection
= sectp
;
2400 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2402 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2404 dwz_file
->str
.s
.asection
= sectp
;
2405 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2407 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2409 dwz_file
->line
.s
.asection
= sectp
;
2410 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2412 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2414 dwz_file
->macro
.s
.asection
= sectp
;
2415 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2417 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2419 dwz_file
->gdb_index
.s
.asection
= sectp
;
2420 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2424 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2425 there is no .gnu_debugaltlink section in the file. Error if there
2426 is such a section but the file cannot be found. */
2428 static struct dwz_file
*
2429 dwarf2_get_dwz_file (void)
2433 struct cleanup
*cleanup
;
2434 const char *filename
;
2435 struct dwz_file
*result
;
2436 bfd_size_type buildid_len_arg
;
2440 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2441 return dwarf2_per_objfile
->dwz_file
;
2443 bfd_set_error (bfd_error_no_error
);
2444 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2445 &buildid_len_arg
, &buildid
);
2448 if (bfd_get_error () == bfd_error_no_error
)
2450 error (_("could not read '.gnu_debugaltlink' section: %s"),
2451 bfd_errmsg (bfd_get_error ()));
2453 cleanup
= make_cleanup (xfree
, data
);
2454 make_cleanup (xfree
, buildid
);
2456 buildid_len
= (size_t) buildid_len_arg
;
2458 filename
= (const char *) data
;
2459 if (!IS_ABSOLUTE_PATH (filename
))
2461 char *abs
= gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2464 make_cleanup (xfree
, abs
);
2465 abs
= ldirname (abs
);
2466 make_cleanup (xfree
, abs
);
2468 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2469 make_cleanup (xfree
, rel
);
2473 /* First try the file name given in the section. If that doesn't
2474 work, try to use the build-id instead. */
2475 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2476 if (dwz_bfd
!= NULL
)
2478 if (!build_id_verify (dwz_bfd
, buildid_len
, buildid
))
2480 gdb_bfd_unref (dwz_bfd
);
2485 if (dwz_bfd
== NULL
)
2486 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2488 if (dwz_bfd
== NULL
)
2489 error (_("could not find '.gnu_debugaltlink' file for %s"),
2490 objfile_name (dwarf2_per_objfile
->objfile
));
2492 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2494 result
->dwz_bfd
= dwz_bfd
;
2496 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2498 do_cleanups (cleanup
);
2500 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, dwz_bfd
);
2501 dwarf2_per_objfile
->dwz_file
= result
;
2505 /* DWARF quick_symbols_functions support. */
2507 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2508 unique line tables, so we maintain a separate table of all .debug_line
2509 derived entries to support the sharing.
2510 All the quick functions need is the list of file names. We discard the
2511 line_header when we're done and don't need to record it here. */
2512 struct quick_file_names
2514 /* The data used to construct the hash key. */
2515 struct stmt_list_hash hash
;
2517 /* The number of entries in file_names, real_names. */
2518 unsigned int num_file_names
;
2520 /* The file names from the line table, after being run through
2522 const char **file_names
;
2524 /* The file names from the line table after being run through
2525 gdb_realpath. These are computed lazily. */
2526 const char **real_names
;
2529 /* When using the index (and thus not using psymtabs), each CU has an
2530 object of this type. This is used to hold information needed by
2531 the various "quick" methods. */
2532 struct dwarf2_per_cu_quick_data
2534 /* The file table. This can be NULL if there was no file table
2535 or it's currently not read in.
2536 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2537 struct quick_file_names
*file_names
;
2539 /* The corresponding symbol table. This is NULL if symbols for this
2540 CU have not yet been read. */
2541 struct compunit_symtab
*compunit_symtab
;
2543 /* A temporary mark bit used when iterating over all CUs in
2544 expand_symtabs_matching. */
2545 unsigned int mark
: 1;
2547 /* True if we've tried to read the file table and found there isn't one.
2548 There will be no point in trying to read it again next time. */
2549 unsigned int no_file_data
: 1;
2552 /* Utility hash function for a stmt_list_hash. */
2555 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2559 if (stmt_list_hash
->dwo_unit
!= NULL
)
2560 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2561 v
+= stmt_list_hash
->line_offset
.sect_off
;
2565 /* Utility equality function for a stmt_list_hash. */
2568 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2569 const struct stmt_list_hash
*rhs
)
2571 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2573 if (lhs
->dwo_unit
!= NULL
2574 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2577 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2580 /* Hash function for a quick_file_names. */
2583 hash_file_name_entry (const void *e
)
2585 const struct quick_file_names
*file_data
= e
;
2587 return hash_stmt_list_entry (&file_data
->hash
);
2590 /* Equality function for a quick_file_names. */
2593 eq_file_name_entry (const void *a
, const void *b
)
2595 const struct quick_file_names
*ea
= a
;
2596 const struct quick_file_names
*eb
= b
;
2598 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2601 /* Delete function for a quick_file_names. */
2604 delete_file_name_entry (void *e
)
2606 struct quick_file_names
*file_data
= e
;
2609 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2611 xfree ((void*) file_data
->file_names
[i
]);
2612 if (file_data
->real_names
)
2613 xfree ((void*) file_data
->real_names
[i
]);
2616 /* The space for the struct itself lives on objfile_obstack,
2617 so we don't free it here. */
2620 /* Create a quick_file_names hash table. */
2623 create_quick_file_names_table (unsigned int nr_initial_entries
)
2625 return htab_create_alloc (nr_initial_entries
,
2626 hash_file_name_entry
, eq_file_name_entry
,
2627 delete_file_name_entry
, xcalloc
, xfree
);
2630 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2631 have to be created afterwards. You should call age_cached_comp_units after
2632 processing PER_CU->CU. dw2_setup must have been already called. */
2635 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2637 if (per_cu
->is_debug_types
)
2638 load_full_type_unit (per_cu
);
2640 load_full_comp_unit (per_cu
, language_minimal
);
2642 gdb_assert (per_cu
->cu
!= NULL
);
2644 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2647 /* Read in the symbols for PER_CU. */
2650 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2652 struct cleanup
*back_to
;
2654 /* Skip type_unit_groups, reading the type units they contain
2655 is handled elsewhere. */
2656 if (IS_TYPE_UNIT_GROUP (per_cu
))
2659 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2661 if (dwarf2_per_objfile
->using_index
2662 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2663 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2665 queue_comp_unit (per_cu
, language_minimal
);
2668 /* If we just loaded a CU from a DWO, and we're working with an index
2669 that may badly handle TUs, load all the TUs in that DWO as well.
2670 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2671 if (!per_cu
->is_debug_types
2672 && per_cu
->cu
->dwo_unit
!= NULL
2673 && dwarf2_per_objfile
->index_table
!= NULL
2674 && dwarf2_per_objfile
->index_table
->version
<= 7
2675 /* DWP files aren't supported yet. */
2676 && get_dwp_file () == NULL
)
2677 queue_and_load_all_dwo_tus (per_cu
);
2682 /* Age the cache, releasing compilation units that have not
2683 been used recently. */
2684 age_cached_comp_units ();
2686 do_cleanups (back_to
);
2689 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2690 the objfile from which this CU came. Returns the resulting symbol
2693 static struct compunit_symtab
*
2694 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2696 gdb_assert (dwarf2_per_objfile
->using_index
);
2697 if (!per_cu
->v
.quick
->compunit_symtab
)
2699 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2700 increment_reading_symtab ();
2701 dw2_do_instantiate_symtab (per_cu
);
2702 process_cu_includes ();
2703 do_cleanups (back_to
);
2706 return per_cu
->v
.quick
->compunit_symtab
;
2709 /* Return the CU/TU given its index.
2711 This is intended for loops like:
2713 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2714 + dwarf2_per_objfile->n_type_units); ++i)
2716 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2722 static struct dwarf2_per_cu_data
*
2723 dw2_get_cutu (int index
)
2725 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2727 index
-= dwarf2_per_objfile
->n_comp_units
;
2728 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2729 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2732 return dwarf2_per_objfile
->all_comp_units
[index
];
2735 /* Return the CU given its index.
2736 This differs from dw2_get_cutu in that it's for when you know INDEX
2739 static struct dwarf2_per_cu_data
*
2740 dw2_get_cu (int index
)
2742 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2744 return dwarf2_per_objfile
->all_comp_units
[index
];
2747 /* A helper for create_cus_from_index that handles a given list of
2751 create_cus_from_index_list (struct objfile
*objfile
,
2752 const gdb_byte
*cu_list
, offset_type n_elements
,
2753 struct dwarf2_section_info
*section
,
2759 for (i
= 0; i
< n_elements
; i
+= 2)
2761 struct dwarf2_per_cu_data
*the_cu
;
2762 ULONGEST offset
, length
;
2764 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2765 offset
= extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2766 length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2769 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2770 struct dwarf2_per_cu_data
);
2771 the_cu
->offset
.sect_off
= offset
;
2772 the_cu
->length
= length
;
2773 the_cu
->objfile
= objfile
;
2774 the_cu
->section
= section
;
2775 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2776 struct dwarf2_per_cu_quick_data
);
2777 the_cu
->is_dwz
= is_dwz
;
2778 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2782 /* Read the CU list from the mapped index, and use it to create all
2783 the CU objects for this objfile. */
2786 create_cus_from_index (struct objfile
*objfile
,
2787 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2788 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2790 struct dwz_file
*dwz
;
2792 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2793 dwarf2_per_objfile
->all_comp_units
2794 = obstack_alloc (&objfile
->objfile_obstack
,
2795 dwarf2_per_objfile
->n_comp_units
2796 * sizeof (struct dwarf2_per_cu_data
*));
2798 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2799 &dwarf2_per_objfile
->info
, 0, 0);
2801 if (dwz_elements
== 0)
2804 dwz
= dwarf2_get_dwz_file ();
2805 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
2806 cu_list_elements
/ 2);
2809 /* Create the signatured type hash table from the index. */
2812 create_signatured_type_table_from_index (struct objfile
*objfile
,
2813 struct dwarf2_section_info
*section
,
2814 const gdb_byte
*bytes
,
2815 offset_type elements
)
2818 htab_t sig_types_hash
;
2820 dwarf2_per_objfile
->n_type_units
2821 = dwarf2_per_objfile
->n_allocated_type_units
2823 dwarf2_per_objfile
->all_type_units
2824 = xmalloc (dwarf2_per_objfile
->n_type_units
2825 * sizeof (struct signatured_type
*));
2827 sig_types_hash
= allocate_signatured_type_table (objfile
);
2829 for (i
= 0; i
< elements
; i
+= 3)
2831 struct signatured_type
*sig_type
;
2832 ULONGEST offset
, type_offset_in_tu
, signature
;
2835 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2836 offset
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2837 type_offset_in_tu
= extract_unsigned_integer (bytes
+ 8, 8,
2839 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2842 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2843 struct signatured_type
);
2844 sig_type
->signature
= signature
;
2845 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2846 sig_type
->per_cu
.is_debug_types
= 1;
2847 sig_type
->per_cu
.section
= section
;
2848 sig_type
->per_cu
.offset
.sect_off
= offset
;
2849 sig_type
->per_cu
.objfile
= objfile
;
2850 sig_type
->per_cu
.v
.quick
2851 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2852 struct dwarf2_per_cu_quick_data
);
2854 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2857 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2860 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2863 /* Read the address map data from the mapped index, and use it to
2864 populate the objfile's psymtabs_addrmap. */
2867 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2869 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2870 const gdb_byte
*iter
, *end
;
2871 struct obstack temp_obstack
;
2872 struct addrmap
*mutable_map
;
2873 struct cleanup
*cleanup
;
2876 obstack_init (&temp_obstack
);
2877 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2878 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2880 iter
= index
->address_table
;
2881 end
= iter
+ index
->address_table_size
;
2883 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2887 ULONGEST hi
, lo
, cu_index
;
2888 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2890 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2892 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2897 complaint (&symfile_complaints
,
2898 _(".gdb_index address table has invalid range (%s - %s)"),
2899 hex_string (lo
), hex_string (hi
));
2903 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
2905 complaint (&symfile_complaints
,
2906 _(".gdb_index address table has invalid CU number %u"),
2907 (unsigned) cu_index
);
2911 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
2912 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
2913 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
2916 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2917 &objfile
->objfile_obstack
);
2918 do_cleanups (cleanup
);
2921 /* The hash function for strings in the mapped index. This is the same as
2922 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2923 implementation. This is necessary because the hash function is tied to the
2924 format of the mapped index file. The hash values do not have to match with
2927 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2930 mapped_index_string_hash (int index_version
, const void *p
)
2932 const unsigned char *str
= (const unsigned char *) p
;
2936 while ((c
= *str
++) != 0)
2938 if (index_version
>= 5)
2940 r
= r
* 67 + c
- 113;
2946 /* Find a slot in the mapped index INDEX for the object named NAME.
2947 If NAME is found, set *VEC_OUT to point to the CU vector in the
2948 constant pool and return 1. If NAME cannot be found, return 0. */
2951 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2952 offset_type
**vec_out
)
2954 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2956 offset_type slot
, step
;
2957 int (*cmp
) (const char *, const char *);
2959 if (current_language
->la_language
== language_cplus
2960 || current_language
->la_language
== language_java
2961 || current_language
->la_language
== language_fortran
)
2963 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2966 if (strchr (name
, '(') != NULL
)
2968 char *without_params
= cp_remove_params (name
);
2970 if (without_params
!= NULL
)
2972 make_cleanup (xfree
, without_params
);
2973 name
= without_params
;
2978 /* Index version 4 did not support case insensitive searches. But the
2979 indices for case insensitive languages are built in lowercase, therefore
2980 simulate our NAME being searched is also lowercased. */
2981 hash
= mapped_index_string_hash ((index
->version
== 4
2982 && case_sensitivity
== case_sensitive_off
2983 ? 5 : index
->version
),
2986 slot
= hash
& (index
->symbol_table_slots
- 1);
2987 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2988 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2992 /* Convert a slot number to an offset into the table. */
2993 offset_type i
= 2 * slot
;
2995 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2997 do_cleanups (back_to
);
3001 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3002 if (!cmp (name
, str
))
3004 *vec_out
= (offset_type
*) (index
->constant_pool
3005 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3006 do_cleanups (back_to
);
3010 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3014 /* A helper function that reads the .gdb_index from SECTION and fills
3015 in MAP. FILENAME is the name of the file containing the section;
3016 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3017 ok to use deprecated sections.
3019 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3020 out parameters that are filled in with information about the CU and
3021 TU lists in the section.
3023 Returns 1 if all went well, 0 otherwise. */
3026 read_index_from_section (struct objfile
*objfile
,
3027 const char *filename
,
3029 struct dwarf2_section_info
*section
,
3030 struct mapped_index
*map
,
3031 const gdb_byte
**cu_list
,
3032 offset_type
*cu_list_elements
,
3033 const gdb_byte
**types_list
,
3034 offset_type
*types_list_elements
)
3036 const gdb_byte
*addr
;
3037 offset_type version
;
3038 offset_type
*metadata
;
3041 if (dwarf2_section_empty_p (section
))
3044 /* Older elfutils strip versions could keep the section in the main
3045 executable while splitting it for the separate debug info file. */
3046 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3049 dwarf2_read_section (objfile
, section
);
3051 addr
= section
->buffer
;
3052 /* Version check. */
3053 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3054 /* Versions earlier than 3 emitted every copy of a psymbol. This
3055 causes the index to behave very poorly for certain requests. Version 3
3056 contained incomplete addrmap. So, it seems better to just ignore such
3060 static int warning_printed
= 0;
3061 if (!warning_printed
)
3063 warning (_("Skipping obsolete .gdb_index section in %s."),
3065 warning_printed
= 1;
3069 /* Index version 4 uses a different hash function than index version
3072 Versions earlier than 6 did not emit psymbols for inlined
3073 functions. Using these files will cause GDB not to be able to
3074 set breakpoints on inlined functions by name, so we ignore these
3075 indices unless the user has done
3076 "set use-deprecated-index-sections on". */
3077 if (version
< 6 && !deprecated_ok
)
3079 static int warning_printed
= 0;
3080 if (!warning_printed
)
3083 Skipping deprecated .gdb_index section in %s.\n\
3084 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3085 to use the section anyway."),
3087 warning_printed
= 1;
3091 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3092 of the TU (for symbols coming from TUs),
3093 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3094 Plus gold-generated indices can have duplicate entries for global symbols,
3095 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3096 These are just performance bugs, and we can't distinguish gdb-generated
3097 indices from gold-generated ones, so issue no warning here. */
3099 /* Indexes with higher version than the one supported by GDB may be no
3100 longer backward compatible. */
3104 map
->version
= version
;
3105 map
->total_size
= section
->size
;
3107 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3110 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3111 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3115 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3116 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3117 - MAYBE_SWAP (metadata
[i
]))
3121 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3122 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3123 - MAYBE_SWAP (metadata
[i
]));
3126 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3127 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3128 - MAYBE_SWAP (metadata
[i
]))
3129 / (2 * sizeof (offset_type
)));
3132 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3138 /* Read the index file. If everything went ok, initialize the "quick"
3139 elements of all the CUs and return 1. Otherwise, return 0. */
3142 dwarf2_read_index (struct objfile
*objfile
)
3144 struct mapped_index local_map
, *map
;
3145 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3146 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3147 struct dwz_file
*dwz
;
3149 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3150 use_deprecated_index_sections
,
3151 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3152 &cu_list
, &cu_list_elements
,
3153 &types_list
, &types_list_elements
))
3156 /* Don't use the index if it's empty. */
3157 if (local_map
.symbol_table_slots
== 0)
3160 /* If there is a .dwz file, read it so we can get its CU list as
3162 dwz
= dwarf2_get_dwz_file ();
3165 struct mapped_index dwz_map
;
3166 const gdb_byte
*dwz_types_ignore
;
3167 offset_type dwz_types_elements_ignore
;
3169 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3171 &dwz
->gdb_index
, &dwz_map
,
3172 &dwz_list
, &dwz_list_elements
,
3174 &dwz_types_elements_ignore
))
3176 warning (_("could not read '.gdb_index' section from %s; skipping"),
3177 bfd_get_filename (dwz
->dwz_bfd
));
3182 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3185 if (types_list_elements
)
3187 struct dwarf2_section_info
*section
;
3189 /* We can only handle a single .debug_types when we have an
3191 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3194 section
= VEC_index (dwarf2_section_info_def
,
3195 dwarf2_per_objfile
->types
, 0);
3197 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3198 types_list_elements
);
3201 create_addrmap_from_index (objfile
, &local_map
);
3203 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
3206 dwarf2_per_objfile
->index_table
= map
;
3207 dwarf2_per_objfile
->using_index
= 1;
3208 dwarf2_per_objfile
->quick_file_names_table
=
3209 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3214 /* A helper for the "quick" functions which sets the global
3215 dwarf2_per_objfile according to OBJFILE. */
3218 dw2_setup (struct objfile
*objfile
)
3220 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
3221 gdb_assert (dwarf2_per_objfile
);
3224 /* die_reader_func for dw2_get_file_names. */
3227 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3228 const gdb_byte
*info_ptr
,
3229 struct die_info
*comp_unit_die
,
3233 struct dwarf2_cu
*cu
= reader
->cu
;
3234 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3235 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3236 struct dwarf2_per_cu_data
*lh_cu
;
3237 struct line_header
*lh
;
3238 struct attribute
*attr
;
3240 const char *name
, *comp_dir
;
3242 struct quick_file_names
*qfn
;
3243 unsigned int line_offset
;
3245 gdb_assert (! this_cu
->is_debug_types
);
3247 /* Our callers never want to match partial units -- instead they
3248 will match the enclosing full CU. */
3249 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3251 this_cu
->v
.quick
->no_file_data
= 1;
3260 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3263 struct quick_file_names find_entry
;
3265 line_offset
= DW_UNSND (attr
);
3267 /* We may have already read in this line header (TU line header sharing).
3268 If we have we're done. */
3269 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3270 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
3271 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3272 &find_entry
, INSERT
);
3275 lh_cu
->v
.quick
->file_names
= *slot
;
3279 lh
= dwarf_decode_line_header (line_offset
, cu
);
3283 lh_cu
->v
.quick
->no_file_data
= 1;
3287 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
3288 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3289 qfn
->hash
.line_offset
.sect_off
= line_offset
;
3290 gdb_assert (slot
!= NULL
);
3293 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
3295 qfn
->num_file_names
= lh
->num_file_names
;
3296 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
3297 lh
->num_file_names
* sizeof (char *));
3298 for (i
= 0; i
< lh
->num_file_names
; ++i
)
3299 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
3300 qfn
->real_names
= NULL
;
3302 free_line_header (lh
);
3304 lh_cu
->v
.quick
->file_names
= qfn
;
3307 /* A helper for the "quick" functions which attempts to read the line
3308 table for THIS_CU. */
3310 static struct quick_file_names
*
3311 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3313 /* This should never be called for TUs. */
3314 gdb_assert (! this_cu
->is_debug_types
);
3315 /* Nor type unit groups. */
3316 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3318 if (this_cu
->v
.quick
->file_names
!= NULL
)
3319 return this_cu
->v
.quick
->file_names
;
3320 /* If we know there is no line data, no point in looking again. */
3321 if (this_cu
->v
.quick
->no_file_data
)
3324 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3326 if (this_cu
->v
.quick
->no_file_data
)
3328 return this_cu
->v
.quick
->file_names
;
3331 /* A helper for the "quick" functions which computes and caches the
3332 real path for a given file name from the line table. */
3335 dw2_get_real_path (struct objfile
*objfile
,
3336 struct quick_file_names
*qfn
, int index
)
3338 if (qfn
->real_names
== NULL
)
3339 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3340 qfn
->num_file_names
, const char *);
3342 if (qfn
->real_names
[index
] == NULL
)
3343 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
3345 return qfn
->real_names
[index
];
3348 static struct symtab
*
3349 dw2_find_last_source_symtab (struct objfile
*objfile
)
3351 struct compunit_symtab
*cust
;
3354 dw2_setup (objfile
);
3355 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3356 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3359 return compunit_primary_filetab (cust
);
3362 /* Traversal function for dw2_forget_cached_source_info. */
3365 dw2_free_cached_file_names (void **slot
, void *info
)
3367 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3369 if (file_data
->real_names
)
3373 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3375 xfree ((void*) file_data
->real_names
[i
]);
3376 file_data
->real_names
[i
] = NULL
;
3384 dw2_forget_cached_source_info (struct objfile
*objfile
)
3386 dw2_setup (objfile
);
3388 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3389 dw2_free_cached_file_names
, NULL
);
3392 /* Helper function for dw2_map_symtabs_matching_filename that expands
3393 the symtabs and calls the iterator. */
3396 dw2_map_expand_apply (struct objfile
*objfile
,
3397 struct dwarf2_per_cu_data
*per_cu
,
3398 const char *name
, const char *real_path
,
3399 int (*callback
) (struct symtab
*, void *),
3402 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3404 /* Don't visit already-expanded CUs. */
3405 if (per_cu
->v
.quick
->compunit_symtab
)
3408 /* This may expand more than one symtab, and we want to iterate over
3410 dw2_instantiate_symtab (per_cu
);
3412 return iterate_over_some_symtabs (name
, real_path
, callback
, data
,
3413 objfile
->compunit_symtabs
, last_made
);
3416 /* Implementation of the map_symtabs_matching_filename method. */
3419 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3420 const char *real_path
,
3421 int (*callback
) (struct symtab
*, void *),
3425 const char *name_basename
= lbasename (name
);
3427 dw2_setup (objfile
);
3429 /* The rule is CUs specify all the files, including those used by
3430 any TU, so there's no need to scan TUs here. */
3432 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3435 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3436 struct quick_file_names
*file_data
;
3438 /* We only need to look at symtabs not already expanded. */
3439 if (per_cu
->v
.quick
->compunit_symtab
)
3442 file_data
= dw2_get_file_names (per_cu
);
3443 if (file_data
== NULL
)
3446 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3448 const char *this_name
= file_data
->file_names
[j
];
3449 const char *this_real_name
;
3451 if (compare_filenames_for_search (this_name
, name
))
3453 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3459 /* Before we invoke realpath, which can get expensive when many
3460 files are involved, do a quick comparison of the basenames. */
3461 if (! basenames_may_differ
3462 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3465 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3466 if (compare_filenames_for_search (this_real_name
, name
))
3468 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3474 if (real_path
!= NULL
)
3476 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3477 gdb_assert (IS_ABSOLUTE_PATH (name
));
3478 if (this_real_name
!= NULL
3479 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3481 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3493 /* Struct used to manage iterating over all CUs looking for a symbol. */
3495 struct dw2_symtab_iterator
3497 /* The internalized form of .gdb_index. */
3498 struct mapped_index
*index
;
3499 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3500 int want_specific_block
;
3501 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3502 Unused if !WANT_SPECIFIC_BLOCK. */
3504 /* The kind of symbol we're looking for. */
3506 /* The list of CUs from the index entry of the symbol,
3507 or NULL if not found. */
3509 /* The next element in VEC to look at. */
3511 /* The number of elements in VEC, or zero if there is no match. */
3513 /* Have we seen a global version of the symbol?
3514 If so we can ignore all further global instances.
3515 This is to work around gold/15646, inefficient gold-generated
3520 /* Initialize the index symtab iterator ITER.
3521 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3522 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3525 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3526 struct mapped_index
*index
,
3527 int want_specific_block
,
3532 iter
->index
= index
;
3533 iter
->want_specific_block
= want_specific_block
;
3534 iter
->block_index
= block_index
;
3535 iter
->domain
= domain
;
3537 iter
->global_seen
= 0;
3539 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3540 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3548 /* Return the next matching CU or NULL if there are no more. */
3550 static struct dwarf2_per_cu_data
*
3551 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3553 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3555 offset_type cu_index_and_attrs
=
3556 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3557 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3558 struct dwarf2_per_cu_data
*per_cu
;
3559 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3560 /* This value is only valid for index versions >= 7. */
3561 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3562 gdb_index_symbol_kind symbol_kind
=
3563 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3564 /* Only check the symbol attributes if they're present.
3565 Indices prior to version 7 don't record them,
3566 and indices >= 7 may elide them for certain symbols
3567 (gold does this). */
3569 (iter
->index
->version
>= 7
3570 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3572 /* Don't crash on bad data. */
3573 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3574 + dwarf2_per_objfile
->n_type_units
))
3576 complaint (&symfile_complaints
,
3577 _(".gdb_index entry has bad CU index"
3579 objfile_name (dwarf2_per_objfile
->objfile
));
3583 per_cu
= dw2_get_cutu (cu_index
);
3585 /* Skip if already read in. */
3586 if (per_cu
->v
.quick
->compunit_symtab
)
3589 /* Check static vs global. */
3592 if (iter
->want_specific_block
3593 && want_static
!= is_static
)
3595 /* Work around gold/15646. */
3596 if (!is_static
&& iter
->global_seen
)
3599 iter
->global_seen
= 1;
3602 /* Only check the symbol's kind if it has one. */
3605 switch (iter
->domain
)
3608 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3609 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3610 /* Some types are also in VAR_DOMAIN. */
3611 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3615 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3619 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3634 static struct compunit_symtab
*
3635 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3636 const char *name
, domain_enum domain
)
3638 struct compunit_symtab
*stab_best
= NULL
;
3639 struct mapped_index
*index
;
3641 dw2_setup (objfile
);
3643 index
= dwarf2_per_objfile
->index_table
;
3645 /* index is NULL if OBJF_READNOW. */
3648 struct dw2_symtab_iterator iter
;
3649 struct dwarf2_per_cu_data
*per_cu
;
3651 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3653 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3655 struct symbol
*sym
= NULL
;
3656 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3657 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3658 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3660 /* Some caution must be observed with overloaded functions
3661 and methods, since the index will not contain any overload
3662 information (but NAME might contain it). */
3663 sym
= block_lookup_symbol (block
, name
, domain
);
3665 if (sym
&& strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
3667 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
3673 /* Keep looking through other CUs. */
3681 dw2_print_stats (struct objfile
*objfile
)
3683 int i
, total
, count
;
3685 dw2_setup (objfile
);
3686 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3688 for (i
= 0; i
< total
; ++i
)
3690 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3692 if (!per_cu
->v
.quick
->compunit_symtab
)
3695 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3696 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3699 /* This dumps minimal information about the index.
3700 It is called via "mt print objfiles".
3701 One use is to verify .gdb_index has been loaded by the
3702 gdb.dwarf2/gdb-index.exp testcase. */
3705 dw2_dump (struct objfile
*objfile
)
3707 dw2_setup (objfile
);
3708 gdb_assert (dwarf2_per_objfile
->using_index
);
3709 printf_filtered (".gdb_index:");
3710 if (dwarf2_per_objfile
->index_table
!= NULL
)
3712 printf_filtered (" version %d\n",
3713 dwarf2_per_objfile
->index_table
->version
);
3716 printf_filtered (" faked for \"readnow\"\n");
3717 printf_filtered ("\n");
3721 dw2_relocate (struct objfile
*objfile
,
3722 const struct section_offsets
*new_offsets
,
3723 const struct section_offsets
*delta
)
3725 /* There's nothing to relocate here. */
3729 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3730 const char *func_name
)
3732 struct mapped_index
*index
;
3734 dw2_setup (objfile
);
3736 index
= dwarf2_per_objfile
->index_table
;
3738 /* index is NULL if OBJF_READNOW. */
3741 struct dw2_symtab_iterator iter
;
3742 struct dwarf2_per_cu_data
*per_cu
;
3744 /* Note: It doesn't matter what we pass for block_index here. */
3745 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3748 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3749 dw2_instantiate_symtab (per_cu
);
3754 dw2_expand_all_symtabs (struct objfile
*objfile
)
3758 dw2_setup (objfile
);
3760 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3761 + dwarf2_per_objfile
->n_type_units
); ++i
)
3763 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3765 dw2_instantiate_symtab (per_cu
);
3770 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3771 const char *fullname
)
3775 dw2_setup (objfile
);
3777 /* We don't need to consider type units here.
3778 This is only called for examining code, e.g. expand_line_sal.
3779 There can be an order of magnitude (or more) more type units
3780 than comp units, and we avoid them if we can. */
3782 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3785 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3786 struct quick_file_names
*file_data
;
3788 /* We only need to look at symtabs not already expanded. */
3789 if (per_cu
->v
.quick
->compunit_symtab
)
3792 file_data
= dw2_get_file_names (per_cu
);
3793 if (file_data
== NULL
)
3796 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3798 const char *this_fullname
= file_data
->file_names
[j
];
3800 if (filename_cmp (this_fullname
, fullname
) == 0)
3802 dw2_instantiate_symtab (per_cu
);
3810 dw2_map_matching_symbols (struct objfile
*objfile
,
3811 const char * name
, domain_enum
namespace,
3813 int (*callback
) (struct block
*,
3814 struct symbol
*, void *),
3815 void *data
, symbol_compare_ftype
*match
,
3816 symbol_compare_ftype
*ordered_compare
)
3818 /* Currently unimplemented; used for Ada. The function can be called if the
3819 current language is Ada for a non-Ada objfile using GNU index. As Ada
3820 does not look for non-Ada symbols this function should just return. */
3824 dw2_expand_symtabs_matching
3825 (struct objfile
*objfile
,
3826 expand_symtabs_file_matcher_ftype
*file_matcher
,
3827 expand_symtabs_symbol_matcher_ftype
*symbol_matcher
,
3828 expand_symtabs_exp_notify_ftype
*expansion_notify
,
3829 enum search_domain kind
,
3834 struct mapped_index
*index
;
3836 dw2_setup (objfile
);
3838 /* index_table is NULL if OBJF_READNOW. */
3839 if (!dwarf2_per_objfile
->index_table
)
3841 index
= dwarf2_per_objfile
->index_table
;
3843 if (file_matcher
!= NULL
)
3845 struct cleanup
*cleanup
;
3846 htab_t visited_found
, visited_not_found
;
3848 visited_found
= htab_create_alloc (10,
3849 htab_hash_pointer
, htab_eq_pointer
,
3850 NULL
, xcalloc
, xfree
);
3851 cleanup
= make_cleanup_htab_delete (visited_found
);
3852 visited_not_found
= htab_create_alloc (10,
3853 htab_hash_pointer
, htab_eq_pointer
,
3854 NULL
, xcalloc
, xfree
);
3855 make_cleanup_htab_delete (visited_not_found
);
3857 /* The rule is CUs specify all the files, including those used by
3858 any TU, so there's no need to scan TUs here. */
3860 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3863 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3864 struct quick_file_names
*file_data
;
3867 per_cu
->v
.quick
->mark
= 0;
3869 /* We only need to look at symtabs not already expanded. */
3870 if (per_cu
->v
.quick
->compunit_symtab
)
3873 file_data
= dw2_get_file_names (per_cu
);
3874 if (file_data
== NULL
)
3877 if (htab_find (visited_not_found
, file_data
) != NULL
)
3879 else if (htab_find (visited_found
, file_data
) != NULL
)
3881 per_cu
->v
.quick
->mark
= 1;
3885 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3887 const char *this_real_name
;
3889 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3891 per_cu
->v
.quick
->mark
= 1;
3895 /* Before we invoke realpath, which can get expensive when many
3896 files are involved, do a quick comparison of the basenames. */
3897 if (!basenames_may_differ
3898 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3902 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3903 if (file_matcher (this_real_name
, data
, 0))
3905 per_cu
->v
.quick
->mark
= 1;
3910 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3912 : visited_not_found
,
3917 do_cleanups (cleanup
);
3920 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3922 offset_type idx
= 2 * iter
;
3924 offset_type
*vec
, vec_len
, vec_idx
;
3925 int global_seen
= 0;
3927 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3930 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3932 if (! (*symbol_matcher
) (name
, data
))
3935 /* The name was matched, now expand corresponding CUs that were
3937 vec
= (offset_type
*) (index
->constant_pool
3938 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3939 vec_len
= MAYBE_SWAP (vec
[0]);
3940 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3942 struct dwarf2_per_cu_data
*per_cu
;
3943 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3944 /* This value is only valid for index versions >= 7. */
3945 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3946 gdb_index_symbol_kind symbol_kind
=
3947 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3948 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3949 /* Only check the symbol attributes if they're present.
3950 Indices prior to version 7 don't record them,
3951 and indices >= 7 may elide them for certain symbols
3952 (gold does this). */
3954 (index
->version
>= 7
3955 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3957 /* Work around gold/15646. */
3960 if (!is_static
&& global_seen
)
3966 /* Only check the symbol's kind if it has one. */
3971 case VARIABLES_DOMAIN
:
3972 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3975 case FUNCTIONS_DOMAIN
:
3976 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3980 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3988 /* Don't crash on bad data. */
3989 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3990 + dwarf2_per_objfile
->n_type_units
))
3992 complaint (&symfile_complaints
,
3993 _(".gdb_index entry has bad CU index"
3994 " [in module %s]"), objfile_name (objfile
));
3998 per_cu
= dw2_get_cutu (cu_index
);
3999 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4001 int symtab_was_null
=
4002 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4004 dw2_instantiate_symtab (per_cu
);
4006 if (expansion_notify
!= NULL
4008 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4010 expansion_notify (per_cu
->v
.quick
->compunit_symtab
,
4018 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4021 static struct compunit_symtab
*
4022 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4027 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4028 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4031 if (cust
->includes
== NULL
)
4034 for (i
= 0; cust
->includes
[i
]; ++i
)
4036 struct compunit_symtab
*s
= cust
->includes
[i
];
4038 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4046 static struct compunit_symtab
*
4047 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4048 struct bound_minimal_symbol msymbol
,
4050 struct obj_section
*section
,
4053 struct dwarf2_per_cu_data
*data
;
4054 struct compunit_symtab
*result
;
4056 dw2_setup (objfile
);
4058 if (!objfile
->psymtabs_addrmap
)
4061 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
4065 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4066 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4067 paddress (get_objfile_arch (objfile
), pc
));
4070 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4072 gdb_assert (result
!= NULL
);
4077 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4078 void *data
, int need_fullname
)
4081 struct cleanup
*cleanup
;
4082 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4083 NULL
, xcalloc
, xfree
);
4085 cleanup
= make_cleanup_htab_delete (visited
);
4086 dw2_setup (objfile
);
4088 /* The rule is CUs specify all the files, including those used by
4089 any TU, so there's no need to scan TUs here.
4090 We can ignore file names coming from already-expanded CUs. */
4092 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4094 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4096 if (per_cu
->v
.quick
->compunit_symtab
)
4098 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4101 *slot
= per_cu
->v
.quick
->file_names
;
4105 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4108 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4109 struct quick_file_names
*file_data
;
4112 /* We only need to look at symtabs not already expanded. */
4113 if (per_cu
->v
.quick
->compunit_symtab
)
4116 file_data
= dw2_get_file_names (per_cu
);
4117 if (file_data
== NULL
)
4120 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4123 /* Already visited. */
4128 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4130 const char *this_real_name
;
4133 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4135 this_real_name
= NULL
;
4136 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4140 do_cleanups (cleanup
);
4144 dw2_has_symbols (struct objfile
*objfile
)
4149 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4152 dw2_find_last_source_symtab
,
4153 dw2_forget_cached_source_info
,
4154 dw2_map_symtabs_matching_filename
,
4159 dw2_expand_symtabs_for_function
,
4160 dw2_expand_all_symtabs
,
4161 dw2_expand_symtabs_with_fullname
,
4162 dw2_map_matching_symbols
,
4163 dw2_expand_symtabs_matching
,
4164 dw2_find_pc_sect_compunit_symtab
,
4165 dw2_map_symbol_filenames
4168 /* Initialize for reading DWARF for this objfile. Return 0 if this
4169 file will use psymtabs, or 1 if using the GNU index. */
4172 dwarf2_initialize_objfile (struct objfile
*objfile
)
4174 /* If we're about to read full symbols, don't bother with the
4175 indices. In this case we also don't care if some other debug
4176 format is making psymtabs, because they are all about to be
4178 if ((objfile
->flags
& OBJF_READNOW
))
4182 dwarf2_per_objfile
->using_index
= 1;
4183 create_all_comp_units (objfile
);
4184 create_all_type_units (objfile
);
4185 dwarf2_per_objfile
->quick_file_names_table
=
4186 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4188 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4189 + dwarf2_per_objfile
->n_type_units
); ++i
)
4191 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4193 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4194 struct dwarf2_per_cu_quick_data
);
4197 /* Return 1 so that gdb sees the "quick" functions. However,
4198 these functions will be no-ops because we will have expanded
4203 if (dwarf2_read_index (objfile
))
4211 /* Build a partial symbol table. */
4214 dwarf2_build_psymtabs (struct objfile
*objfile
)
4216 volatile struct gdb_exception except
;
4218 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4220 init_psymbol_list (objfile
, 1024);
4223 TRY_CATCH (except
, RETURN_MASK_ERROR
)
4225 /* This isn't really ideal: all the data we allocate on the
4226 objfile's obstack is still uselessly kept around. However,
4227 freeing it seems unsafe. */
4228 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4230 dwarf2_build_psymtabs_hard (objfile
);
4231 discard_cleanups (cleanups
);
4233 if (except
.reason
< 0)
4234 exception_print (gdb_stderr
, except
);
4237 /* Return the total length of the CU described by HEADER. */
4240 get_cu_length (const struct comp_unit_head
*header
)
4242 return header
->initial_length_size
+ header
->length
;
4245 /* Return TRUE if OFFSET is within CU_HEADER. */
4248 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4250 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4251 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4253 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4256 /* Find the base address of the compilation unit for range lists and
4257 location lists. It will normally be specified by DW_AT_low_pc.
4258 In DWARF-3 draft 4, the base address could be overridden by
4259 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4260 compilation units with discontinuous ranges. */
4263 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4265 struct attribute
*attr
;
4268 cu
->base_address
= 0;
4270 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4273 cu
->base_address
= attr_value_as_address (attr
);
4278 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4281 cu
->base_address
= attr_value_as_address (attr
);
4287 /* Read in the comp unit header information from the debug_info at info_ptr.
4288 NOTE: This leaves members offset, first_die_offset to be filled in
4291 static const gdb_byte
*
4292 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4293 const gdb_byte
*info_ptr
, bfd
*abfd
)
4296 unsigned int bytes_read
;
4298 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4299 cu_header
->initial_length_size
= bytes_read
;
4300 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4301 info_ptr
+= bytes_read
;
4302 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4304 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4306 info_ptr
+= bytes_read
;
4307 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4309 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4310 if (signed_addr
< 0)
4311 internal_error (__FILE__
, __LINE__
,
4312 _("read_comp_unit_head: dwarf from non elf file"));
4313 cu_header
->signed_addr_p
= signed_addr
;
4318 /* Helper function that returns the proper abbrev section for
4321 static struct dwarf2_section_info
*
4322 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4324 struct dwarf2_section_info
*abbrev
;
4326 if (this_cu
->is_dwz
)
4327 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4329 abbrev
= &dwarf2_per_objfile
->abbrev
;
4334 /* Subroutine of read_and_check_comp_unit_head and
4335 read_and_check_type_unit_head to simplify them.
4336 Perform various error checking on the header. */
4339 error_check_comp_unit_head (struct comp_unit_head
*header
,
4340 struct dwarf2_section_info
*section
,
4341 struct dwarf2_section_info
*abbrev_section
)
4343 bfd
*abfd
= get_section_bfd_owner (section
);
4344 const char *filename
= get_section_file_name (section
);
4346 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4347 error (_("Dwarf Error: wrong version in compilation unit header "
4348 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4351 if (header
->abbrev_offset
.sect_off
4352 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4353 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4354 "(offset 0x%lx + 6) [in module %s]"),
4355 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4358 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4359 avoid potential 32-bit overflow. */
4360 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4362 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4363 "(offset 0x%lx + 0) [in module %s]"),
4364 (long) header
->length
, (long) header
->offset
.sect_off
,
4368 /* Read in a CU/TU header and perform some basic error checking.
4369 The contents of the header are stored in HEADER.
4370 The result is a pointer to the start of the first DIE. */
4372 static const gdb_byte
*
4373 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4374 struct dwarf2_section_info
*section
,
4375 struct dwarf2_section_info
*abbrev_section
,
4376 const gdb_byte
*info_ptr
,
4377 int is_debug_types_section
)
4379 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4380 bfd
*abfd
= get_section_bfd_owner (section
);
4382 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4384 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4386 /* If we're reading a type unit, skip over the signature and
4387 type_offset fields. */
4388 if (is_debug_types_section
)
4389 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4391 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4393 error_check_comp_unit_head (header
, section
, abbrev_section
);
4398 /* Read in the types comp unit header information from .debug_types entry at
4399 types_ptr. The result is a pointer to one past the end of the header. */
4401 static const gdb_byte
*
4402 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4403 struct dwarf2_section_info
*section
,
4404 struct dwarf2_section_info
*abbrev_section
,
4405 const gdb_byte
*info_ptr
,
4406 ULONGEST
*signature
,
4407 cu_offset
*type_offset_in_tu
)
4409 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4410 bfd
*abfd
= get_section_bfd_owner (section
);
4412 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4414 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4416 /* If we're reading a type unit, skip over the signature and
4417 type_offset fields. */
4418 if (signature
!= NULL
)
4419 *signature
= read_8_bytes (abfd
, info_ptr
);
4421 if (type_offset_in_tu
!= NULL
)
4422 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4423 header
->offset_size
);
4424 info_ptr
+= header
->offset_size
;
4426 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4428 error_check_comp_unit_head (header
, section
, abbrev_section
);
4433 /* Fetch the abbreviation table offset from a comp or type unit header. */
4436 read_abbrev_offset (struct dwarf2_section_info
*section
,
4439 bfd
*abfd
= get_section_bfd_owner (section
);
4440 const gdb_byte
*info_ptr
;
4441 unsigned int length
, initial_length_size
, offset_size
;
4442 sect_offset abbrev_offset
;
4444 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4445 info_ptr
= section
->buffer
+ offset
.sect_off
;
4446 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4447 offset_size
= initial_length_size
== 4 ? 4 : 8;
4448 info_ptr
+= initial_length_size
+ 2 /*version*/;
4449 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4450 return abbrev_offset
;
4453 /* Allocate a new partial symtab for file named NAME and mark this new
4454 partial symtab as being an include of PST. */
4457 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4458 struct objfile
*objfile
)
4460 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4462 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4464 /* It shares objfile->objfile_obstack. */
4465 subpst
->dirname
= pst
->dirname
;
4468 subpst
->section_offsets
= pst
->section_offsets
;
4469 subpst
->textlow
= 0;
4470 subpst
->texthigh
= 0;
4472 subpst
->dependencies
= (struct partial_symtab
**)
4473 obstack_alloc (&objfile
->objfile_obstack
,
4474 sizeof (struct partial_symtab
*));
4475 subpst
->dependencies
[0] = pst
;
4476 subpst
->number_of_dependencies
= 1;
4478 subpst
->globals_offset
= 0;
4479 subpst
->n_global_syms
= 0;
4480 subpst
->statics_offset
= 0;
4481 subpst
->n_static_syms
= 0;
4482 subpst
->compunit_symtab
= NULL
;
4483 subpst
->read_symtab
= pst
->read_symtab
;
4486 /* No private part is necessary for include psymtabs. This property
4487 can be used to differentiate between such include psymtabs and
4488 the regular ones. */
4489 subpst
->read_symtab_private
= NULL
;
4492 /* Read the Line Number Program data and extract the list of files
4493 included by the source file represented by PST. Build an include
4494 partial symtab for each of these included files. */
4497 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4498 struct die_info
*die
,
4499 struct partial_symtab
*pst
)
4501 struct line_header
*lh
= NULL
;
4502 struct attribute
*attr
;
4504 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4506 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4508 return; /* No linetable, so no includes. */
4510 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4511 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4513 free_line_header (lh
);
4517 hash_signatured_type (const void *item
)
4519 const struct signatured_type
*sig_type
= item
;
4521 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4522 return sig_type
->signature
;
4526 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4528 const struct signatured_type
*lhs
= item_lhs
;
4529 const struct signatured_type
*rhs
= item_rhs
;
4531 return lhs
->signature
== rhs
->signature
;
4534 /* Allocate a hash table for signatured types. */
4537 allocate_signatured_type_table (struct objfile
*objfile
)
4539 return htab_create_alloc_ex (41,
4540 hash_signatured_type
,
4543 &objfile
->objfile_obstack
,
4544 hashtab_obstack_allocate
,
4545 dummy_obstack_deallocate
);
4548 /* A helper function to add a signatured type CU to a table. */
4551 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4553 struct signatured_type
*sigt
= *slot
;
4554 struct signatured_type
***datap
= datum
;
4562 /* Create the hash table of all entries in the .debug_types
4563 (or .debug_types.dwo) section(s).
4564 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4565 otherwise it is NULL.
4567 The result is a pointer to the hash table or NULL if there are no types.
4569 Note: This function processes DWO files only, not DWP files. */
4572 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4573 VEC (dwarf2_section_info_def
) *types
)
4575 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4576 htab_t types_htab
= NULL
;
4578 struct dwarf2_section_info
*section
;
4579 struct dwarf2_section_info
*abbrev_section
;
4581 if (VEC_empty (dwarf2_section_info_def
, types
))
4584 abbrev_section
= (dwo_file
!= NULL
4585 ? &dwo_file
->sections
.abbrev
4586 : &dwarf2_per_objfile
->abbrev
);
4588 if (dwarf2_read_debug
)
4589 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4590 dwo_file
? ".dwo" : "",
4591 get_section_file_name (abbrev_section
));
4594 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4598 const gdb_byte
*info_ptr
, *end_ptr
;
4600 dwarf2_read_section (objfile
, section
);
4601 info_ptr
= section
->buffer
;
4603 if (info_ptr
== NULL
)
4606 /* We can't set abfd until now because the section may be empty or
4607 not present, in which case the bfd is unknown. */
4608 abfd
= get_section_bfd_owner (section
);
4610 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4611 because we don't need to read any dies: the signature is in the
4614 end_ptr
= info_ptr
+ section
->size
;
4615 while (info_ptr
< end_ptr
)
4618 cu_offset type_offset_in_tu
;
4620 struct signatured_type
*sig_type
;
4621 struct dwo_unit
*dwo_tu
;
4623 const gdb_byte
*ptr
= info_ptr
;
4624 struct comp_unit_head header
;
4625 unsigned int length
;
4627 offset
.sect_off
= ptr
- section
->buffer
;
4629 /* We need to read the type's signature in order to build the hash
4630 table, but we don't need anything else just yet. */
4632 ptr
= read_and_check_type_unit_head (&header
, section
,
4633 abbrev_section
, ptr
,
4634 &signature
, &type_offset_in_tu
);
4636 length
= get_cu_length (&header
);
4638 /* Skip dummy type units. */
4639 if (ptr
>= info_ptr
+ length
4640 || peek_abbrev_code (abfd
, ptr
) == 0)
4646 if (types_htab
== NULL
)
4649 types_htab
= allocate_dwo_unit_table (objfile
);
4651 types_htab
= allocate_signatured_type_table (objfile
);
4657 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4659 dwo_tu
->dwo_file
= dwo_file
;
4660 dwo_tu
->signature
= signature
;
4661 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4662 dwo_tu
->section
= section
;
4663 dwo_tu
->offset
= offset
;
4664 dwo_tu
->length
= length
;
4668 /* N.B.: type_offset is not usable if this type uses a DWO file.
4669 The real type_offset is in the DWO file. */
4671 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4672 struct signatured_type
);
4673 sig_type
->signature
= signature
;
4674 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4675 sig_type
->per_cu
.objfile
= objfile
;
4676 sig_type
->per_cu
.is_debug_types
= 1;
4677 sig_type
->per_cu
.section
= section
;
4678 sig_type
->per_cu
.offset
= offset
;
4679 sig_type
->per_cu
.length
= length
;
4682 slot
= htab_find_slot (types_htab
,
4683 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4685 gdb_assert (slot
!= NULL
);
4688 sect_offset dup_offset
;
4692 const struct dwo_unit
*dup_tu
= *slot
;
4694 dup_offset
= dup_tu
->offset
;
4698 const struct signatured_type
*dup_tu
= *slot
;
4700 dup_offset
= dup_tu
->per_cu
.offset
;
4703 complaint (&symfile_complaints
,
4704 _("debug type entry at offset 0x%x is duplicate to"
4705 " the entry at offset 0x%x, signature %s"),
4706 offset
.sect_off
, dup_offset
.sect_off
,
4707 hex_string (signature
));
4709 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4711 if (dwarf2_read_debug
> 1)
4712 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4714 hex_string (signature
));
4723 /* Create the hash table of all entries in the .debug_types section,
4724 and initialize all_type_units.
4725 The result is zero if there is an error (e.g. missing .debug_types section),
4726 otherwise non-zero. */
4729 create_all_type_units (struct objfile
*objfile
)
4732 struct signatured_type
**iter
;
4734 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4735 if (types_htab
== NULL
)
4737 dwarf2_per_objfile
->signatured_types
= NULL
;
4741 dwarf2_per_objfile
->signatured_types
= types_htab
;
4743 dwarf2_per_objfile
->n_type_units
4744 = dwarf2_per_objfile
->n_allocated_type_units
4745 = htab_elements (types_htab
);
4746 dwarf2_per_objfile
->all_type_units
4747 = xmalloc (dwarf2_per_objfile
->n_type_units
4748 * sizeof (struct signatured_type
*));
4749 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4750 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4751 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4752 == dwarf2_per_objfile
->n_type_units
);
4757 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4758 If SLOT is non-NULL, it is the entry to use in the hash table.
4759 Otherwise we find one. */
4761 static struct signatured_type
*
4762 add_type_unit (ULONGEST sig
, void **slot
)
4764 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4765 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4766 struct signatured_type
*sig_type
;
4768 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4770 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4772 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4773 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4774 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4775 dwarf2_per_objfile
->all_type_units
4776 = xrealloc (dwarf2_per_objfile
->all_type_units
,
4777 dwarf2_per_objfile
->n_allocated_type_units
4778 * sizeof (struct signatured_type
*));
4779 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4781 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4783 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4784 struct signatured_type
);
4785 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4786 sig_type
->signature
= sig
;
4787 sig_type
->per_cu
.is_debug_types
= 1;
4788 if (dwarf2_per_objfile
->using_index
)
4790 sig_type
->per_cu
.v
.quick
=
4791 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4792 struct dwarf2_per_cu_quick_data
);
4797 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4800 gdb_assert (*slot
== NULL
);
4802 /* The rest of sig_type must be filled in by the caller. */
4806 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4807 Fill in SIG_ENTRY with DWO_ENTRY. */
4810 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4811 struct signatured_type
*sig_entry
,
4812 struct dwo_unit
*dwo_entry
)
4814 /* Make sure we're not clobbering something we don't expect to. */
4815 gdb_assert (! sig_entry
->per_cu
.queued
);
4816 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4817 if (dwarf2_per_objfile
->using_index
)
4819 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4820 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4823 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4824 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4825 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4826 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4827 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4829 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4830 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4831 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4832 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4833 sig_entry
->per_cu
.objfile
= objfile
;
4834 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4835 sig_entry
->dwo_unit
= dwo_entry
;
4838 /* Subroutine of lookup_signatured_type.
4839 If we haven't read the TU yet, create the signatured_type data structure
4840 for a TU to be read in directly from a DWO file, bypassing the stub.
4841 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4842 using .gdb_index, then when reading a CU we want to stay in the DWO file
4843 containing that CU. Otherwise we could end up reading several other DWO
4844 files (due to comdat folding) to process the transitive closure of all the
4845 mentioned TUs, and that can be slow. The current DWO file will have every
4846 type signature that it needs.
4847 We only do this for .gdb_index because in the psymtab case we already have
4848 to read all the DWOs to build the type unit groups. */
4850 static struct signatured_type
*
4851 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4853 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4854 struct dwo_file
*dwo_file
;
4855 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4856 struct signatured_type find_sig_entry
, *sig_entry
;
4859 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4861 /* If TU skeletons have been removed then we may not have read in any
4863 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4865 dwarf2_per_objfile
->signatured_types
4866 = allocate_signatured_type_table (objfile
);
4869 /* We only ever need to read in one copy of a signatured type.
4870 Use the global signatured_types array to do our own comdat-folding
4871 of types. If this is the first time we're reading this TU, and
4872 the TU has an entry in .gdb_index, replace the recorded data from
4873 .gdb_index with this TU. */
4875 find_sig_entry
.signature
= sig
;
4876 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4877 &find_sig_entry
, INSERT
);
4880 /* We can get here with the TU already read, *or* in the process of being
4881 read. Don't reassign the global entry to point to this DWO if that's
4882 the case. Also note that if the TU is already being read, it may not
4883 have come from a DWO, the program may be a mix of Fission-compiled
4884 code and non-Fission-compiled code. */
4886 /* Have we already tried to read this TU?
4887 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4888 needn't exist in the global table yet). */
4889 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4892 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4893 dwo_unit of the TU itself. */
4894 dwo_file
= cu
->dwo_unit
->dwo_file
;
4896 /* Ok, this is the first time we're reading this TU. */
4897 if (dwo_file
->tus
== NULL
)
4899 find_dwo_entry
.signature
= sig
;
4900 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4901 if (dwo_entry
== NULL
)
4904 /* If the global table doesn't have an entry for this TU, add one. */
4905 if (sig_entry
== NULL
)
4906 sig_entry
= add_type_unit (sig
, slot
);
4908 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4909 sig_entry
->per_cu
.tu_read
= 1;
4913 /* Subroutine of lookup_signatured_type.
4914 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4915 then try the DWP file. If the TU stub (skeleton) has been removed then
4916 it won't be in .gdb_index. */
4918 static struct signatured_type
*
4919 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4921 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4922 struct dwp_file
*dwp_file
= get_dwp_file ();
4923 struct dwo_unit
*dwo_entry
;
4924 struct signatured_type find_sig_entry
, *sig_entry
;
4927 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4928 gdb_assert (dwp_file
!= NULL
);
4930 /* If TU skeletons have been removed then we may not have read in any
4932 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4934 dwarf2_per_objfile
->signatured_types
4935 = allocate_signatured_type_table (objfile
);
4938 find_sig_entry
.signature
= sig
;
4939 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4940 &find_sig_entry
, INSERT
);
4943 /* Have we already tried to read this TU?
4944 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4945 needn't exist in the global table yet). */
4946 if (sig_entry
!= NULL
)
4949 if (dwp_file
->tus
== NULL
)
4951 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4952 sig
, 1 /* is_debug_types */);
4953 if (dwo_entry
== NULL
)
4956 sig_entry
= add_type_unit (sig
, slot
);
4957 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4962 /* Lookup a signature based type for DW_FORM_ref_sig8.
4963 Returns NULL if signature SIG is not present in the table.
4964 It is up to the caller to complain about this. */
4966 static struct signatured_type
*
4967 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4970 && dwarf2_per_objfile
->using_index
)
4972 /* We're in a DWO/DWP file, and we're using .gdb_index.
4973 These cases require special processing. */
4974 if (get_dwp_file () == NULL
)
4975 return lookup_dwo_signatured_type (cu
, sig
);
4977 return lookup_dwp_signatured_type (cu
, sig
);
4981 struct signatured_type find_entry
, *entry
;
4983 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4985 find_entry
.signature
= sig
;
4986 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4991 /* Low level DIE reading support. */
4993 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4996 init_cu_die_reader (struct die_reader_specs
*reader
,
4997 struct dwarf2_cu
*cu
,
4998 struct dwarf2_section_info
*section
,
4999 struct dwo_file
*dwo_file
)
5001 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5002 reader
->abfd
= get_section_bfd_owner (section
);
5004 reader
->dwo_file
= dwo_file
;
5005 reader
->die_section
= section
;
5006 reader
->buffer
= section
->buffer
;
5007 reader
->buffer_end
= section
->buffer
+ section
->size
;
5008 reader
->comp_dir
= NULL
;
5011 /* Subroutine of init_cutu_and_read_dies to simplify it.
5012 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5013 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5016 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5017 from it to the DIE in the DWO. If NULL we are skipping the stub.
5018 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5019 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5020 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5021 STUB_COMP_DIR may be non-NULL.
5022 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5023 are filled in with the info of the DIE from the DWO file.
5024 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5025 provided an abbrev table to use.
5026 The result is non-zero if a valid (non-dummy) DIE was found. */
5029 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5030 struct dwo_unit
*dwo_unit
,
5031 int abbrev_table_provided
,
5032 struct die_info
*stub_comp_unit_die
,
5033 const char *stub_comp_dir
,
5034 struct die_reader_specs
*result_reader
,
5035 const gdb_byte
**result_info_ptr
,
5036 struct die_info
**result_comp_unit_die
,
5037 int *result_has_children
)
5039 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5040 struct dwarf2_cu
*cu
= this_cu
->cu
;
5041 struct dwarf2_section_info
*section
;
5043 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5044 ULONGEST signature
; /* Or dwo_id. */
5045 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5046 int i
,num_extra_attrs
;
5047 struct dwarf2_section_info
*dwo_abbrev_section
;
5048 struct attribute
*attr
;
5049 struct die_info
*comp_unit_die
;
5051 /* At most one of these may be provided. */
5052 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5054 /* These attributes aren't processed until later:
5055 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5056 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5057 referenced later. However, these attributes are found in the stub
5058 which we won't have later. In order to not impose this complication
5059 on the rest of the code, we read them here and copy them to the
5068 if (stub_comp_unit_die
!= NULL
)
5070 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5072 if (! this_cu
->is_debug_types
)
5073 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5074 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5075 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5076 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5077 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5079 /* There should be a DW_AT_addr_base attribute here (if needed).
5080 We need the value before we can process DW_FORM_GNU_addr_index. */
5082 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5084 cu
->addr_base
= DW_UNSND (attr
);
5086 /* There should be a DW_AT_ranges_base attribute here (if needed).
5087 We need the value before we can process DW_AT_ranges. */
5088 cu
->ranges_base
= 0;
5089 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5091 cu
->ranges_base
= DW_UNSND (attr
);
5093 else if (stub_comp_dir
!= NULL
)
5095 /* Reconstruct the comp_dir attribute to simplify the code below. */
5096 comp_dir
= (struct attribute
*)
5097 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (*comp_dir
));
5098 comp_dir
->name
= DW_AT_comp_dir
;
5099 comp_dir
->form
= DW_FORM_string
;
5100 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5101 DW_STRING (comp_dir
) = stub_comp_dir
;
5104 /* Set up for reading the DWO CU/TU. */
5105 cu
->dwo_unit
= dwo_unit
;
5106 section
= dwo_unit
->section
;
5107 dwarf2_read_section (objfile
, section
);
5108 abfd
= get_section_bfd_owner (section
);
5109 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5110 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5111 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5113 if (this_cu
->is_debug_types
)
5115 ULONGEST header_signature
;
5116 cu_offset type_offset_in_tu
;
5117 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5119 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5123 &type_offset_in_tu
);
5124 /* This is not an assert because it can be caused by bad debug info. */
5125 if (sig_type
->signature
!= header_signature
)
5127 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5128 " TU at offset 0x%x [in module %s]"),
5129 hex_string (sig_type
->signature
),
5130 hex_string (header_signature
),
5131 dwo_unit
->offset
.sect_off
,
5132 bfd_get_filename (abfd
));
5134 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5135 /* For DWOs coming from DWP files, we don't know the CU length
5136 nor the type's offset in the TU until now. */
5137 dwo_unit
->length
= get_cu_length (&cu
->header
);
5138 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5140 /* Establish the type offset that can be used to lookup the type.
5141 For DWO files, we don't know it until now. */
5142 sig_type
->type_offset_in_section
.sect_off
=
5143 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5147 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5150 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5151 /* For DWOs coming from DWP files, we don't know the CU length
5153 dwo_unit
->length
= get_cu_length (&cu
->header
);
5156 /* Replace the CU's original abbrev table with the DWO's.
5157 Reminder: We can't read the abbrev table until we've read the header. */
5158 if (abbrev_table_provided
)
5160 /* Don't free the provided abbrev table, the caller of
5161 init_cutu_and_read_dies owns it. */
5162 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5163 /* Ensure the DWO abbrev table gets freed. */
5164 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5168 dwarf2_free_abbrev_table (cu
);
5169 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5170 /* Leave any existing abbrev table cleanup as is. */
5173 /* Read in the die, but leave space to copy over the attributes
5174 from the stub. This has the benefit of simplifying the rest of
5175 the code - all the work to maintain the illusion of a single
5176 DW_TAG_{compile,type}_unit DIE is done here. */
5177 num_extra_attrs
= ((stmt_list
!= NULL
)
5181 + (comp_dir
!= NULL
));
5182 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5183 result_has_children
, num_extra_attrs
);
5185 /* Copy over the attributes from the stub to the DIE we just read in. */
5186 comp_unit_die
= *result_comp_unit_die
;
5187 i
= comp_unit_die
->num_attrs
;
5188 if (stmt_list
!= NULL
)
5189 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5191 comp_unit_die
->attrs
[i
++] = *low_pc
;
5192 if (high_pc
!= NULL
)
5193 comp_unit_die
->attrs
[i
++] = *high_pc
;
5195 comp_unit_die
->attrs
[i
++] = *ranges
;
5196 if (comp_dir
!= NULL
)
5197 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5198 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5200 if (dwarf2_die_debug
)
5202 fprintf_unfiltered (gdb_stdlog
,
5203 "Read die from %s@0x%x of %s:\n",
5204 get_section_name (section
),
5205 (unsigned) (begin_info_ptr
- section
->buffer
),
5206 bfd_get_filename (abfd
));
5207 dump_die (comp_unit_die
, dwarf2_die_debug
);
5210 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5211 TUs by skipping the stub and going directly to the entry in the DWO file.
5212 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5213 to get it via circuitous means. Blech. */
5214 if (comp_dir
!= NULL
)
5215 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5217 /* Skip dummy compilation units. */
5218 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5219 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5222 *result_info_ptr
= info_ptr
;
5226 /* Subroutine of init_cutu_and_read_dies to simplify it.
5227 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5228 Returns NULL if the specified DWO unit cannot be found. */
5230 static struct dwo_unit
*
5231 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5232 struct die_info
*comp_unit_die
)
5234 struct dwarf2_cu
*cu
= this_cu
->cu
;
5235 struct attribute
*attr
;
5237 struct dwo_unit
*dwo_unit
;
5238 const char *comp_dir
, *dwo_name
;
5240 gdb_assert (cu
!= NULL
);
5242 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5243 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5244 gdb_assert (attr
!= NULL
);
5245 dwo_name
= DW_STRING (attr
);
5247 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5249 comp_dir
= DW_STRING (attr
);
5251 if (this_cu
->is_debug_types
)
5253 struct signatured_type
*sig_type
;
5255 /* Since this_cu is the first member of struct signatured_type,
5256 we can go from a pointer to one to a pointer to the other. */
5257 sig_type
= (struct signatured_type
*) this_cu
;
5258 signature
= sig_type
->signature
;
5259 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5263 struct attribute
*attr
;
5265 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5267 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5269 dwo_name
, objfile_name (this_cu
->objfile
));
5270 signature
= DW_UNSND (attr
);
5271 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5278 /* Subroutine of init_cutu_and_read_dies to simplify it.
5279 See it for a description of the parameters.
5280 Read a TU directly from a DWO file, bypassing the stub.
5282 Note: This function could be a little bit simpler if we shared cleanups
5283 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5284 to do, so we keep this function self-contained. Or we could move this
5285 into our caller, but it's complex enough already. */
5288 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5289 int use_existing_cu
, int keep
,
5290 die_reader_func_ftype
*die_reader_func
,
5293 struct dwarf2_cu
*cu
;
5294 struct signatured_type
*sig_type
;
5295 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5296 struct die_reader_specs reader
;
5297 const gdb_byte
*info_ptr
;
5298 struct die_info
*comp_unit_die
;
5301 /* Verify we can do the following downcast, and that we have the
5303 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5304 sig_type
= (struct signatured_type
*) this_cu
;
5305 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5307 cleanups
= make_cleanup (null_cleanup
, NULL
);
5309 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5311 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5313 /* There's no need to do the rereading_dwo_cu handling that
5314 init_cutu_and_read_dies does since we don't read the stub. */
5318 /* If !use_existing_cu, this_cu->cu must be NULL. */
5319 gdb_assert (this_cu
->cu
== NULL
);
5320 cu
= xmalloc (sizeof (*cu
));
5321 init_one_comp_unit (cu
, this_cu
);
5322 /* If an error occurs while loading, release our storage. */
5323 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5326 /* A future optimization, if needed, would be to use an existing
5327 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5328 could share abbrev tables. */
5330 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5331 0 /* abbrev_table_provided */,
5332 NULL
/* stub_comp_unit_die */,
5333 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5335 &comp_unit_die
, &has_children
) == 0)
5338 do_cleanups (cleanups
);
5342 /* All the "real" work is done here. */
5343 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5345 /* This duplicates the code in init_cutu_and_read_dies,
5346 but the alternative is making the latter more complex.
5347 This function is only for the special case of using DWO files directly:
5348 no point in overly complicating the general case just to handle this. */
5349 if (free_cu_cleanup
!= NULL
)
5353 /* We've successfully allocated this compilation unit. Let our
5354 caller clean it up when finished with it. */
5355 discard_cleanups (free_cu_cleanup
);
5357 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5358 So we have to manually free the abbrev table. */
5359 dwarf2_free_abbrev_table (cu
);
5361 /* Link this CU into read_in_chain. */
5362 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5363 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5366 do_cleanups (free_cu_cleanup
);
5369 do_cleanups (cleanups
);
5372 /* Initialize a CU (or TU) and read its DIEs.
5373 If the CU defers to a DWO file, read the DWO file as well.
5375 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5376 Otherwise the table specified in the comp unit header is read in and used.
5377 This is an optimization for when we already have the abbrev table.
5379 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5380 Otherwise, a new CU is allocated with xmalloc.
5382 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5383 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5385 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5386 linker) then DIE_READER_FUNC will not get called. */
5389 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5390 struct abbrev_table
*abbrev_table
,
5391 int use_existing_cu
, int keep
,
5392 die_reader_func_ftype
*die_reader_func
,
5395 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5396 struct dwarf2_section_info
*section
= this_cu
->section
;
5397 bfd
*abfd
= get_section_bfd_owner (section
);
5398 struct dwarf2_cu
*cu
;
5399 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5400 struct die_reader_specs reader
;
5401 struct die_info
*comp_unit_die
;
5403 struct attribute
*attr
;
5404 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5405 struct signatured_type
*sig_type
= NULL
;
5406 struct dwarf2_section_info
*abbrev_section
;
5407 /* Non-zero if CU currently points to a DWO file and we need to
5408 reread it. When this happens we need to reread the skeleton die
5409 before we can reread the DWO file (this only applies to CUs, not TUs). */
5410 int rereading_dwo_cu
= 0;
5412 if (dwarf2_die_debug
)
5413 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5414 this_cu
->is_debug_types
? "type" : "comp",
5415 this_cu
->offset
.sect_off
);
5417 if (use_existing_cu
)
5420 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5421 file (instead of going through the stub), short-circuit all of this. */
5422 if (this_cu
->reading_dwo_directly
)
5424 /* Narrow down the scope of possibilities to have to understand. */
5425 gdb_assert (this_cu
->is_debug_types
);
5426 gdb_assert (abbrev_table
== NULL
);
5427 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5428 die_reader_func
, data
);
5432 cleanups
= make_cleanup (null_cleanup
, NULL
);
5434 /* This is cheap if the section is already read in. */
5435 dwarf2_read_section (objfile
, section
);
5437 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5439 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5441 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5444 /* If this CU is from a DWO file we need to start over, we need to
5445 refetch the attributes from the skeleton CU.
5446 This could be optimized by retrieving those attributes from when we
5447 were here the first time: the previous comp_unit_die was stored in
5448 comp_unit_obstack. But there's no data yet that we need this
5450 if (cu
->dwo_unit
!= NULL
)
5451 rereading_dwo_cu
= 1;
5455 /* If !use_existing_cu, this_cu->cu must be NULL. */
5456 gdb_assert (this_cu
->cu
== NULL
);
5457 cu
= xmalloc (sizeof (*cu
));
5458 init_one_comp_unit (cu
, this_cu
);
5459 /* If an error occurs while loading, release our storage. */
5460 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5463 /* Get the header. */
5464 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5466 /* We already have the header, there's no need to read it in again. */
5467 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5471 if (this_cu
->is_debug_types
)
5474 cu_offset type_offset_in_tu
;
5476 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5477 abbrev_section
, info_ptr
,
5479 &type_offset_in_tu
);
5481 /* Since per_cu is the first member of struct signatured_type,
5482 we can go from a pointer to one to a pointer to the other. */
5483 sig_type
= (struct signatured_type
*) this_cu
;
5484 gdb_assert (sig_type
->signature
== signature
);
5485 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5486 == type_offset_in_tu
.cu_off
);
5487 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5489 /* LENGTH has not been set yet for type units if we're
5490 using .gdb_index. */
5491 this_cu
->length
= get_cu_length (&cu
->header
);
5493 /* Establish the type offset that can be used to lookup the type. */
5494 sig_type
->type_offset_in_section
.sect_off
=
5495 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5499 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5503 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5504 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5508 /* Skip dummy compilation units. */
5509 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5510 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5512 do_cleanups (cleanups
);
5516 /* If we don't have them yet, read the abbrevs for this compilation unit.
5517 And if we need to read them now, make sure they're freed when we're
5518 done. Note that it's important that if the CU had an abbrev table
5519 on entry we don't free it when we're done: Somewhere up the call stack
5520 it may be in use. */
5521 if (abbrev_table
!= NULL
)
5523 gdb_assert (cu
->abbrev_table
== NULL
);
5524 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5525 == abbrev_table
->offset
.sect_off
);
5526 cu
->abbrev_table
= abbrev_table
;
5528 else if (cu
->abbrev_table
== NULL
)
5530 dwarf2_read_abbrevs (cu
, abbrev_section
);
5531 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5533 else if (rereading_dwo_cu
)
5535 dwarf2_free_abbrev_table (cu
);
5536 dwarf2_read_abbrevs (cu
, abbrev_section
);
5539 /* Read the top level CU/TU die. */
5540 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5541 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5543 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5545 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5546 DWO CU, that this test will fail (the attribute will not be present). */
5547 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5550 struct dwo_unit
*dwo_unit
;
5551 struct die_info
*dwo_comp_unit_die
;
5555 complaint (&symfile_complaints
,
5556 _("compilation unit with DW_AT_GNU_dwo_name"
5557 " has children (offset 0x%x) [in module %s]"),
5558 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5560 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5561 if (dwo_unit
!= NULL
)
5563 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5564 abbrev_table
!= NULL
,
5565 comp_unit_die
, NULL
,
5567 &dwo_comp_unit_die
, &has_children
) == 0)
5570 do_cleanups (cleanups
);
5573 comp_unit_die
= dwo_comp_unit_die
;
5577 /* Yikes, we couldn't find the rest of the DIE, we only have
5578 the stub. A complaint has already been logged. There's
5579 not much more we can do except pass on the stub DIE to
5580 die_reader_func. We don't want to throw an error on bad
5585 /* All of the above is setup for this call. Yikes. */
5586 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5588 /* Done, clean up. */
5589 if (free_cu_cleanup
!= NULL
)
5593 /* We've successfully allocated this compilation unit. Let our
5594 caller clean it up when finished with it. */
5595 discard_cleanups (free_cu_cleanup
);
5597 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5598 So we have to manually free the abbrev table. */
5599 dwarf2_free_abbrev_table (cu
);
5601 /* Link this CU into read_in_chain. */
5602 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5603 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5606 do_cleanups (free_cu_cleanup
);
5609 do_cleanups (cleanups
);
5612 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5613 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5614 to have already done the lookup to find the DWO file).
5616 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5617 THIS_CU->is_debug_types, but nothing else.
5619 We fill in THIS_CU->length.
5621 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5622 linker) then DIE_READER_FUNC will not get called.
5624 THIS_CU->cu is always freed when done.
5625 This is done in order to not leave THIS_CU->cu in a state where we have
5626 to care whether it refers to the "main" CU or the DWO CU. */
5629 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5630 struct dwo_file
*dwo_file
,
5631 die_reader_func_ftype
*die_reader_func
,
5634 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5635 struct dwarf2_section_info
*section
= this_cu
->section
;
5636 bfd
*abfd
= get_section_bfd_owner (section
);
5637 struct dwarf2_section_info
*abbrev_section
;
5638 struct dwarf2_cu cu
;
5639 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5640 struct die_reader_specs reader
;
5641 struct cleanup
*cleanups
;
5642 struct die_info
*comp_unit_die
;
5645 if (dwarf2_die_debug
)
5646 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5647 this_cu
->is_debug_types
? "type" : "comp",
5648 this_cu
->offset
.sect_off
);
5650 gdb_assert (this_cu
->cu
== NULL
);
5652 abbrev_section
= (dwo_file
!= NULL
5653 ? &dwo_file
->sections
.abbrev
5654 : get_abbrev_section_for_cu (this_cu
));
5656 /* This is cheap if the section is already read in. */
5657 dwarf2_read_section (objfile
, section
);
5659 init_one_comp_unit (&cu
, this_cu
);
5661 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5663 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5664 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5665 abbrev_section
, info_ptr
,
5666 this_cu
->is_debug_types
);
5668 this_cu
->length
= get_cu_length (&cu
.header
);
5670 /* Skip dummy compilation units. */
5671 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5672 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5674 do_cleanups (cleanups
);
5678 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5679 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5681 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5682 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5684 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5686 do_cleanups (cleanups
);
5689 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5690 does not lookup the specified DWO file.
5691 This cannot be used to read DWO files.
5693 THIS_CU->cu is always freed when done.
5694 This is done in order to not leave THIS_CU->cu in a state where we have
5695 to care whether it refers to the "main" CU or the DWO CU.
5696 We can revisit this if the data shows there's a performance issue. */
5699 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5700 die_reader_func_ftype
*die_reader_func
,
5703 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5706 /* Type Unit Groups.
5708 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5709 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5710 so that all types coming from the same compilation (.o file) are grouped
5711 together. A future step could be to put the types in the same symtab as
5712 the CU the types ultimately came from. */
5715 hash_type_unit_group (const void *item
)
5717 const struct type_unit_group
*tu_group
= item
;
5719 return hash_stmt_list_entry (&tu_group
->hash
);
5723 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5725 const struct type_unit_group
*lhs
= item_lhs
;
5726 const struct type_unit_group
*rhs
= item_rhs
;
5728 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5731 /* Allocate a hash table for type unit groups. */
5734 allocate_type_unit_groups_table (void)
5736 return htab_create_alloc_ex (3,
5737 hash_type_unit_group
,
5740 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5741 hashtab_obstack_allocate
,
5742 dummy_obstack_deallocate
);
5745 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5746 partial symtabs. We combine several TUs per psymtab to not let the size
5747 of any one psymtab grow too big. */
5748 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5749 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5751 /* Helper routine for get_type_unit_group.
5752 Create the type_unit_group object used to hold one or more TUs. */
5754 static struct type_unit_group
*
5755 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5757 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5758 struct dwarf2_per_cu_data
*per_cu
;
5759 struct type_unit_group
*tu_group
;
5761 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5762 struct type_unit_group
);
5763 per_cu
= &tu_group
->per_cu
;
5764 per_cu
->objfile
= objfile
;
5766 if (dwarf2_per_objfile
->using_index
)
5768 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5769 struct dwarf2_per_cu_quick_data
);
5773 unsigned int line_offset
= line_offset_struct
.sect_off
;
5774 struct partial_symtab
*pst
;
5777 /* Give the symtab a useful name for debug purposes. */
5778 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5779 name
= xstrprintf ("<type_units_%d>",
5780 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5782 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5784 pst
= create_partial_symtab (per_cu
, name
);
5790 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5791 tu_group
->hash
.line_offset
= line_offset_struct
;
5796 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5797 STMT_LIST is a DW_AT_stmt_list attribute. */
5799 static struct type_unit_group
*
5800 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5802 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5803 struct type_unit_group
*tu_group
;
5805 unsigned int line_offset
;
5806 struct type_unit_group type_unit_group_for_lookup
;
5808 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5810 dwarf2_per_objfile
->type_unit_groups
=
5811 allocate_type_unit_groups_table ();
5814 /* Do we need to create a new group, or can we use an existing one? */
5818 line_offset
= DW_UNSND (stmt_list
);
5819 ++tu_stats
->nr_symtab_sharers
;
5823 /* Ugh, no stmt_list. Rare, but we have to handle it.
5824 We can do various things here like create one group per TU or
5825 spread them over multiple groups to split up the expansion work.
5826 To avoid worst case scenarios (too many groups or too large groups)
5827 we, umm, group them in bunches. */
5828 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5829 | (tu_stats
->nr_stmt_less_type_units
5830 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5831 ++tu_stats
->nr_stmt_less_type_units
;
5834 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5835 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5836 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5837 &type_unit_group_for_lookup
, INSERT
);
5841 gdb_assert (tu_group
!= NULL
);
5845 sect_offset line_offset_struct
;
5847 line_offset_struct
.sect_off
= line_offset
;
5848 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5850 ++tu_stats
->nr_symtabs
;
5856 /* Partial symbol tables. */
5858 /* Create a psymtab named NAME and assign it to PER_CU.
5860 The caller must fill in the following details:
5861 dirname, textlow, texthigh. */
5863 static struct partial_symtab
*
5864 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5866 struct objfile
*objfile
= per_cu
->objfile
;
5867 struct partial_symtab
*pst
;
5869 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
5871 objfile
->global_psymbols
.next
,
5872 objfile
->static_psymbols
.next
);
5874 pst
->psymtabs_addrmap_supported
= 1;
5876 /* This is the glue that links PST into GDB's symbol API. */
5877 pst
->read_symtab_private
= per_cu
;
5878 pst
->read_symtab
= dwarf2_read_symtab
;
5879 per_cu
->v
.psymtab
= pst
;
5884 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5887 struct process_psymtab_comp_unit_data
5889 /* True if we are reading a DW_TAG_partial_unit. */
5891 int want_partial_unit
;
5893 /* The "pretend" language that is used if the CU doesn't declare a
5896 enum language pretend_language
;
5899 /* die_reader_func for process_psymtab_comp_unit. */
5902 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5903 const gdb_byte
*info_ptr
,
5904 struct die_info
*comp_unit_die
,
5908 struct dwarf2_cu
*cu
= reader
->cu
;
5909 struct objfile
*objfile
= cu
->objfile
;
5910 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5911 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5912 struct attribute
*attr
;
5914 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5915 struct partial_symtab
*pst
;
5917 const char *filename
;
5918 struct process_psymtab_comp_unit_data
*info
= data
;
5920 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5923 gdb_assert (! per_cu
->is_debug_types
);
5925 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5927 cu
->list_in_scope
= &file_symbols
;
5929 /* Allocate a new partial symbol table structure. */
5930 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
5931 if (attr
== NULL
|| !DW_STRING (attr
))
5934 filename
= DW_STRING (attr
);
5936 pst
= create_partial_symtab (per_cu
, filename
);
5938 /* This must be done before calling dwarf2_build_include_psymtabs. */
5939 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5941 pst
->dirname
= DW_STRING (attr
);
5943 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5945 dwarf2_find_base_address (comp_unit_die
, cu
);
5947 /* Possibly set the default values of LOWPC and HIGHPC from
5949 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5950 &best_highpc
, cu
, pst
);
5951 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5952 /* Store the contiguous range if it is not empty; it can be empty for
5953 CUs with no code. */
5954 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5955 gdbarch_adjust_dwarf2_addr (gdbarch
,
5956 best_lowpc
+ baseaddr
),
5957 gdbarch_adjust_dwarf2_addr (gdbarch
,
5958 best_highpc
+ baseaddr
) - 1,
5961 /* Check if comp unit has_children.
5962 If so, read the rest of the partial symbols from this comp unit.
5963 If not, there's no more debug_info for this comp unit. */
5966 struct partial_die_info
*first_die
;
5967 CORE_ADDR lowpc
, highpc
;
5969 lowpc
= ((CORE_ADDR
) -1);
5970 highpc
= ((CORE_ADDR
) 0);
5972 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5974 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
5977 /* If we didn't find a lowpc, set it to highpc to avoid
5978 complaints from `maint check'. */
5979 if (lowpc
== ((CORE_ADDR
) -1))
5982 /* If the compilation unit didn't have an explicit address range,
5983 then use the information extracted from its child dies. */
5987 best_highpc
= highpc
;
5990 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
5991 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
5993 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5994 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5995 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5996 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5997 sort_pst_symbols (objfile
, pst
);
5999 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6002 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6003 struct dwarf2_per_cu_data
*iter
;
6005 /* Fill in 'dependencies' here; we fill in 'users' in a
6007 pst
->number_of_dependencies
= len
;
6008 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6009 len
* sizeof (struct symtab
*));
6011 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6014 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6016 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6019 /* Get the list of files included in the current compilation unit,
6020 and build a psymtab for each of them. */
6021 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6023 if (dwarf2_read_debug
)
6025 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6027 fprintf_unfiltered (gdb_stdlog
,
6028 "Psymtab for %s unit @0x%x: %s - %s"
6029 ", %d global, %d static syms\n",
6030 per_cu
->is_debug_types
? "type" : "comp",
6031 per_cu
->offset
.sect_off
,
6032 paddress (gdbarch
, pst
->textlow
),
6033 paddress (gdbarch
, pst
->texthigh
),
6034 pst
->n_global_syms
, pst
->n_static_syms
);
6038 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6039 Process compilation unit THIS_CU for a psymtab. */
6042 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6043 int want_partial_unit
,
6044 enum language pretend_language
)
6046 struct process_psymtab_comp_unit_data info
;
6048 /* If this compilation unit was already read in, free the
6049 cached copy in order to read it in again. This is
6050 necessary because we skipped some symbols when we first
6051 read in the compilation unit (see load_partial_dies).
6052 This problem could be avoided, but the benefit is unclear. */
6053 if (this_cu
->cu
!= NULL
)
6054 free_one_cached_comp_unit (this_cu
);
6056 gdb_assert (! this_cu
->is_debug_types
);
6057 info
.want_partial_unit
= want_partial_unit
;
6058 info
.pretend_language
= pretend_language
;
6059 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6060 process_psymtab_comp_unit_reader
,
6063 /* Age out any secondary CUs. */
6064 age_cached_comp_units ();
6067 /* Reader function for build_type_psymtabs. */
6070 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6071 const gdb_byte
*info_ptr
,
6072 struct die_info
*type_unit_die
,
6076 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6077 struct dwarf2_cu
*cu
= reader
->cu
;
6078 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6079 struct signatured_type
*sig_type
;
6080 struct type_unit_group
*tu_group
;
6081 struct attribute
*attr
;
6082 struct partial_die_info
*first_die
;
6083 CORE_ADDR lowpc
, highpc
;
6084 struct partial_symtab
*pst
;
6086 gdb_assert (data
== NULL
);
6087 gdb_assert (per_cu
->is_debug_types
);
6088 sig_type
= (struct signatured_type
*) per_cu
;
6093 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6094 tu_group
= get_type_unit_group (cu
, attr
);
6096 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6098 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6099 cu
->list_in_scope
= &file_symbols
;
6100 pst
= create_partial_symtab (per_cu
, "");
6103 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6105 lowpc
= (CORE_ADDR
) -1;
6106 highpc
= (CORE_ADDR
) 0;
6107 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6109 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6110 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6111 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6112 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6113 sort_pst_symbols (objfile
, pst
);
6116 /* Struct used to sort TUs by their abbreviation table offset. */
6118 struct tu_abbrev_offset
6120 struct signatured_type
*sig_type
;
6121 sect_offset abbrev_offset
;
6124 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6127 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6129 const struct tu_abbrev_offset
* const *a
= ap
;
6130 const struct tu_abbrev_offset
* const *b
= bp
;
6131 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6132 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6134 return (aoff
> boff
) - (aoff
< boff
);
6137 /* Efficiently read all the type units.
6138 This does the bulk of the work for build_type_psymtabs.
6140 The efficiency is because we sort TUs by the abbrev table they use and
6141 only read each abbrev table once. In one program there are 200K TUs
6142 sharing 8K abbrev tables.
6144 The main purpose of this function is to support building the
6145 dwarf2_per_objfile->type_unit_groups table.
6146 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6147 can collapse the search space by grouping them by stmt_list.
6148 The savings can be significant, in the same program from above the 200K TUs
6149 share 8K stmt_list tables.
6151 FUNC is expected to call get_type_unit_group, which will create the
6152 struct type_unit_group if necessary and add it to
6153 dwarf2_per_objfile->type_unit_groups. */
6156 build_type_psymtabs_1 (void)
6158 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6159 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6160 struct cleanup
*cleanups
;
6161 struct abbrev_table
*abbrev_table
;
6162 sect_offset abbrev_offset
;
6163 struct tu_abbrev_offset
*sorted_by_abbrev
;
6164 struct type_unit_group
**iter
;
6167 /* It's up to the caller to not call us multiple times. */
6168 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6170 if (dwarf2_per_objfile
->n_type_units
== 0)
6173 /* TUs typically share abbrev tables, and there can be way more TUs than
6174 abbrev tables. Sort by abbrev table to reduce the number of times we
6175 read each abbrev table in.
6176 Alternatives are to punt or to maintain a cache of abbrev tables.
6177 This is simpler and efficient enough for now.
6179 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6180 symtab to use). Typically TUs with the same abbrev offset have the same
6181 stmt_list value too so in practice this should work well.
6183 The basic algorithm here is:
6185 sort TUs by abbrev table
6186 for each TU with same abbrev table:
6187 read abbrev table if first user
6188 read TU top level DIE
6189 [IWBN if DWO skeletons had DW_AT_stmt_list]
6192 if (dwarf2_read_debug
)
6193 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6195 /* Sort in a separate table to maintain the order of all_type_units
6196 for .gdb_index: TU indices directly index all_type_units. */
6197 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6198 dwarf2_per_objfile
->n_type_units
);
6199 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6201 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6203 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6204 sorted_by_abbrev
[i
].abbrev_offset
=
6205 read_abbrev_offset (sig_type
->per_cu
.section
,
6206 sig_type
->per_cu
.offset
);
6208 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6209 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6210 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6212 abbrev_offset
.sect_off
= ~(unsigned) 0;
6213 abbrev_table
= NULL
;
6214 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6216 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6218 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6220 /* Switch to the next abbrev table if necessary. */
6221 if (abbrev_table
== NULL
6222 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6224 if (abbrev_table
!= NULL
)
6226 abbrev_table_free (abbrev_table
);
6227 /* Reset to NULL in case abbrev_table_read_table throws
6228 an error: abbrev_table_free_cleanup will get called. */
6229 abbrev_table
= NULL
;
6231 abbrev_offset
= tu
->abbrev_offset
;
6233 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6235 ++tu_stats
->nr_uniq_abbrev_tables
;
6238 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6239 build_type_psymtabs_reader
, NULL
);
6242 do_cleanups (cleanups
);
6245 /* Print collected type unit statistics. */
6248 print_tu_stats (void)
6250 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6252 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6253 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6254 dwarf2_per_objfile
->n_type_units
);
6255 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6256 tu_stats
->nr_uniq_abbrev_tables
);
6257 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6258 tu_stats
->nr_symtabs
);
6259 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6260 tu_stats
->nr_symtab_sharers
);
6261 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6262 tu_stats
->nr_stmt_less_type_units
);
6263 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6264 tu_stats
->nr_all_type_units_reallocs
);
6267 /* Traversal function for build_type_psymtabs. */
6270 build_type_psymtab_dependencies (void **slot
, void *info
)
6272 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6273 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6274 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6275 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6276 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6277 struct signatured_type
*iter
;
6280 gdb_assert (len
> 0);
6281 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6283 pst
->number_of_dependencies
= len
;
6284 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6285 len
* sizeof (struct psymtab
*));
6287 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6290 gdb_assert (iter
->per_cu
.is_debug_types
);
6291 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6292 iter
->type_unit_group
= tu_group
;
6295 VEC_free (sig_type_ptr
, tu_group
->tus
);
6300 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6301 Build partial symbol tables for the .debug_types comp-units. */
6304 build_type_psymtabs (struct objfile
*objfile
)
6306 if (! create_all_type_units (objfile
))
6309 build_type_psymtabs_1 ();
6312 /* Traversal function for process_skeletonless_type_unit.
6313 Read a TU in a DWO file and build partial symbols for it. */
6316 process_skeletonless_type_unit (void **slot
, void *info
)
6318 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6319 struct objfile
*objfile
= info
;
6320 struct signatured_type find_entry
, *entry
;
6322 /* If this TU doesn't exist in the global table, add it and read it in. */
6324 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6326 dwarf2_per_objfile
->signatured_types
6327 = allocate_signatured_type_table (objfile
);
6330 find_entry
.signature
= dwo_unit
->signature
;
6331 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6333 /* If we've already seen this type there's nothing to do. What's happening
6334 is we're doing our own version of comdat-folding here. */
6338 /* This does the job that create_all_type_units would have done for
6340 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6341 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6344 /* This does the job that build_type_psymtabs_1 would have done. */
6345 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6346 build_type_psymtabs_reader
, NULL
);
6351 /* Traversal function for process_skeletonless_type_units. */
6354 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6356 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6358 if (dwo_file
->tus
!= NULL
)
6360 htab_traverse_noresize (dwo_file
->tus
,
6361 process_skeletonless_type_unit
, info
);
6367 /* Scan all TUs of DWO files, verifying we've processed them.
6368 This is needed in case a TU was emitted without its skeleton.
6369 Note: This can't be done until we know what all the DWO files are. */
6372 process_skeletonless_type_units (struct objfile
*objfile
)
6374 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6375 if (get_dwp_file () == NULL
6376 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6378 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6379 process_dwo_file_for_skeletonless_type_units
,
6384 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6387 psymtabs_addrmap_cleanup (void *o
)
6389 struct objfile
*objfile
= o
;
6391 objfile
->psymtabs_addrmap
= NULL
;
6394 /* Compute the 'user' field for each psymtab in OBJFILE. */
6397 set_partial_user (struct objfile
*objfile
)
6401 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6403 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6404 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6410 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6412 /* Set the 'user' field only if it is not already set. */
6413 if (pst
->dependencies
[j
]->user
== NULL
)
6414 pst
->dependencies
[j
]->user
= pst
;
6419 /* Build the partial symbol table by doing a quick pass through the
6420 .debug_info and .debug_abbrev sections. */
6423 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6425 struct cleanup
*back_to
, *addrmap_cleanup
;
6426 struct obstack temp_obstack
;
6429 if (dwarf2_read_debug
)
6431 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6432 objfile_name (objfile
));
6435 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6437 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6439 /* Any cached compilation units will be linked by the per-objfile
6440 read_in_chain. Make sure to free them when we're done. */
6441 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6443 build_type_psymtabs (objfile
);
6445 create_all_comp_units (objfile
);
6447 /* Create a temporary address map on a temporary obstack. We later
6448 copy this to the final obstack. */
6449 obstack_init (&temp_obstack
);
6450 make_cleanup_obstack_free (&temp_obstack
);
6451 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6452 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6454 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6456 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6458 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6461 /* This has to wait until we read the CUs, we need the list of DWOs. */
6462 process_skeletonless_type_units (objfile
);
6464 /* Now that all TUs have been processed we can fill in the dependencies. */
6465 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6467 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6468 build_type_psymtab_dependencies
, NULL
);
6471 if (dwarf2_read_debug
)
6474 set_partial_user (objfile
);
6476 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6477 &objfile
->objfile_obstack
);
6478 discard_cleanups (addrmap_cleanup
);
6480 do_cleanups (back_to
);
6482 if (dwarf2_read_debug
)
6483 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6484 objfile_name (objfile
));
6487 /* die_reader_func for load_partial_comp_unit. */
6490 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6491 const gdb_byte
*info_ptr
,
6492 struct die_info
*comp_unit_die
,
6496 struct dwarf2_cu
*cu
= reader
->cu
;
6498 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6500 /* Check if comp unit has_children.
6501 If so, read the rest of the partial symbols from this comp unit.
6502 If not, there's no more debug_info for this comp unit. */
6504 load_partial_dies (reader
, info_ptr
, 0);
6507 /* Load the partial DIEs for a secondary CU into memory.
6508 This is also used when rereading a primary CU with load_all_dies. */
6511 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6513 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6514 load_partial_comp_unit_reader
, NULL
);
6518 read_comp_units_from_section (struct objfile
*objfile
,
6519 struct dwarf2_section_info
*section
,
6520 unsigned int is_dwz
,
6523 struct dwarf2_per_cu_data
***all_comp_units
)
6525 const gdb_byte
*info_ptr
;
6526 bfd
*abfd
= get_section_bfd_owner (section
);
6528 if (dwarf2_read_debug
)
6529 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6530 get_section_name (section
),
6531 get_section_file_name (section
));
6533 dwarf2_read_section (objfile
, section
);
6535 info_ptr
= section
->buffer
;
6537 while (info_ptr
< section
->buffer
+ section
->size
)
6539 unsigned int length
, initial_length_size
;
6540 struct dwarf2_per_cu_data
*this_cu
;
6543 offset
.sect_off
= info_ptr
- section
->buffer
;
6545 /* Read just enough information to find out where the next
6546 compilation unit is. */
6547 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6549 /* Save the compilation unit for later lookup. */
6550 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
6551 sizeof (struct dwarf2_per_cu_data
));
6552 memset (this_cu
, 0, sizeof (*this_cu
));
6553 this_cu
->offset
= offset
;
6554 this_cu
->length
= length
+ initial_length_size
;
6555 this_cu
->is_dwz
= is_dwz
;
6556 this_cu
->objfile
= objfile
;
6557 this_cu
->section
= section
;
6559 if (*n_comp_units
== *n_allocated
)
6562 *all_comp_units
= xrealloc (*all_comp_units
,
6564 * sizeof (struct dwarf2_per_cu_data
*));
6566 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6569 info_ptr
= info_ptr
+ this_cu
->length
;
6573 /* Create a list of all compilation units in OBJFILE.
6574 This is only done for -readnow and building partial symtabs. */
6577 create_all_comp_units (struct objfile
*objfile
)
6581 struct dwarf2_per_cu_data
**all_comp_units
;
6582 struct dwz_file
*dwz
;
6586 all_comp_units
= xmalloc (n_allocated
6587 * sizeof (struct dwarf2_per_cu_data
*));
6589 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6590 &n_allocated
, &n_comp_units
, &all_comp_units
);
6592 dwz
= dwarf2_get_dwz_file ();
6594 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6595 &n_allocated
, &n_comp_units
,
6598 dwarf2_per_objfile
->all_comp_units
6599 = obstack_alloc (&objfile
->objfile_obstack
,
6600 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6601 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6602 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6603 xfree (all_comp_units
);
6604 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6607 /* Process all loaded DIEs for compilation unit CU, starting at
6608 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6609 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6610 DW_AT_ranges). See the comments of add_partial_subprogram on how
6611 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6614 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6615 CORE_ADDR
*highpc
, int set_addrmap
,
6616 struct dwarf2_cu
*cu
)
6618 struct partial_die_info
*pdi
;
6620 /* Now, march along the PDI's, descending into ones which have
6621 interesting children but skipping the children of the other ones,
6622 until we reach the end of the compilation unit. */
6628 fixup_partial_die (pdi
, cu
);
6630 /* Anonymous namespaces or modules have no name but have interesting
6631 children, so we need to look at them. Ditto for anonymous
6634 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6635 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6636 || pdi
->tag
== DW_TAG_imported_unit
)
6640 case DW_TAG_subprogram
:
6641 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6643 case DW_TAG_constant
:
6644 case DW_TAG_variable
:
6645 case DW_TAG_typedef
:
6646 case DW_TAG_union_type
:
6647 if (!pdi
->is_declaration
)
6649 add_partial_symbol (pdi
, cu
);
6652 case DW_TAG_class_type
:
6653 case DW_TAG_interface_type
:
6654 case DW_TAG_structure_type
:
6655 if (!pdi
->is_declaration
)
6657 add_partial_symbol (pdi
, cu
);
6660 case DW_TAG_enumeration_type
:
6661 if (!pdi
->is_declaration
)
6662 add_partial_enumeration (pdi
, cu
);
6664 case DW_TAG_base_type
:
6665 case DW_TAG_subrange_type
:
6666 /* File scope base type definitions are added to the partial
6668 add_partial_symbol (pdi
, cu
);
6670 case DW_TAG_namespace
:
6671 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6674 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6676 case DW_TAG_imported_unit
:
6678 struct dwarf2_per_cu_data
*per_cu
;
6680 /* For now we don't handle imported units in type units. */
6681 if (cu
->per_cu
->is_debug_types
)
6683 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6684 " supported in type units [in module %s]"),
6685 objfile_name (cu
->objfile
));
6688 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6692 /* Go read the partial unit, if needed. */
6693 if (per_cu
->v
.psymtab
== NULL
)
6694 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6696 VEC_safe_push (dwarf2_per_cu_ptr
,
6697 cu
->per_cu
->imported_symtabs
, per_cu
);
6700 case DW_TAG_imported_declaration
:
6701 add_partial_symbol (pdi
, cu
);
6708 /* If the die has a sibling, skip to the sibling. */
6710 pdi
= pdi
->die_sibling
;
6714 /* Functions used to compute the fully scoped name of a partial DIE.
6716 Normally, this is simple. For C++, the parent DIE's fully scoped
6717 name is concatenated with "::" and the partial DIE's name. For
6718 Java, the same thing occurs except that "." is used instead of "::".
6719 Enumerators are an exception; they use the scope of their parent
6720 enumeration type, i.e. the name of the enumeration type is not
6721 prepended to the enumerator.
6723 There are two complexities. One is DW_AT_specification; in this
6724 case "parent" means the parent of the target of the specification,
6725 instead of the direct parent of the DIE. The other is compilers
6726 which do not emit DW_TAG_namespace; in this case we try to guess
6727 the fully qualified name of structure types from their members'
6728 linkage names. This must be done using the DIE's children rather
6729 than the children of any DW_AT_specification target. We only need
6730 to do this for structures at the top level, i.e. if the target of
6731 any DW_AT_specification (if any; otherwise the DIE itself) does not
6734 /* Compute the scope prefix associated with PDI's parent, in
6735 compilation unit CU. The result will be allocated on CU's
6736 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6737 field. NULL is returned if no prefix is necessary. */
6739 partial_die_parent_scope (struct partial_die_info
*pdi
,
6740 struct dwarf2_cu
*cu
)
6742 const char *grandparent_scope
;
6743 struct partial_die_info
*parent
, *real_pdi
;
6745 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6746 then this means the parent of the specification DIE. */
6749 while (real_pdi
->has_specification
)
6750 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6751 real_pdi
->spec_is_dwz
, cu
);
6753 parent
= real_pdi
->die_parent
;
6757 if (parent
->scope_set
)
6758 return parent
->scope
;
6760 fixup_partial_die (parent
, cu
);
6762 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6764 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6765 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6766 Work around this problem here. */
6767 if (cu
->language
== language_cplus
6768 && parent
->tag
== DW_TAG_namespace
6769 && strcmp (parent
->name
, "::") == 0
6770 && grandparent_scope
== NULL
)
6772 parent
->scope
= NULL
;
6773 parent
->scope_set
= 1;
6777 if (pdi
->tag
== DW_TAG_enumerator
)
6778 /* Enumerators should not get the name of the enumeration as a prefix. */
6779 parent
->scope
= grandparent_scope
;
6780 else if (parent
->tag
== DW_TAG_namespace
6781 || parent
->tag
== DW_TAG_module
6782 || parent
->tag
== DW_TAG_structure_type
6783 || parent
->tag
== DW_TAG_class_type
6784 || parent
->tag
== DW_TAG_interface_type
6785 || parent
->tag
== DW_TAG_union_type
6786 || parent
->tag
== DW_TAG_enumeration_type
)
6788 if (grandparent_scope
== NULL
)
6789 parent
->scope
= parent
->name
;
6791 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6793 parent
->name
, 0, cu
);
6797 /* FIXME drow/2004-04-01: What should we be doing with
6798 function-local names? For partial symbols, we should probably be
6800 complaint (&symfile_complaints
,
6801 _("unhandled containing DIE tag %d for DIE at %d"),
6802 parent
->tag
, pdi
->offset
.sect_off
);
6803 parent
->scope
= grandparent_scope
;
6806 parent
->scope_set
= 1;
6807 return parent
->scope
;
6810 /* Return the fully scoped name associated with PDI, from compilation unit
6811 CU. The result will be allocated with malloc. */
6814 partial_die_full_name (struct partial_die_info
*pdi
,
6815 struct dwarf2_cu
*cu
)
6817 const char *parent_scope
;
6819 /* If this is a template instantiation, we can not work out the
6820 template arguments from partial DIEs. So, unfortunately, we have
6821 to go through the full DIEs. At least any work we do building
6822 types here will be reused if full symbols are loaded later. */
6823 if (pdi
->has_template_arguments
)
6825 fixup_partial_die (pdi
, cu
);
6827 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6829 struct die_info
*die
;
6830 struct attribute attr
;
6831 struct dwarf2_cu
*ref_cu
= cu
;
6833 /* DW_FORM_ref_addr is using section offset. */
6835 attr
.form
= DW_FORM_ref_addr
;
6836 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6837 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6839 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6843 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6844 if (parent_scope
== NULL
)
6847 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6851 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6853 struct objfile
*objfile
= cu
->objfile
;
6854 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6856 const char *actual_name
= NULL
;
6858 char *built_actual_name
;
6860 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6862 built_actual_name
= partial_die_full_name (pdi
, cu
);
6863 if (built_actual_name
!= NULL
)
6864 actual_name
= built_actual_name
;
6866 if (actual_name
== NULL
)
6867 actual_name
= pdi
->name
;
6871 case DW_TAG_subprogram
:
6872 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6873 if (pdi
->is_external
|| cu
->language
== language_ada
)
6875 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6876 of the global scope. But in Ada, we want to be able to access
6877 nested procedures globally. So all Ada subprograms are stored
6878 in the global scope. */
6879 /* prim_record_minimal_symbol (actual_name, addr, mst_text,
6881 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6882 built_actual_name
!= NULL
,
6883 VAR_DOMAIN
, LOC_BLOCK
,
6884 &objfile
->global_psymbols
,
6885 0, addr
, cu
->language
, objfile
);
6889 /* prim_record_minimal_symbol (actual_name, addr, mst_file_text,
6891 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6892 built_actual_name
!= NULL
,
6893 VAR_DOMAIN
, LOC_BLOCK
,
6894 &objfile
->static_psymbols
,
6895 0, addr
, cu
->language
, objfile
);
6898 case DW_TAG_constant
:
6900 struct psymbol_allocation_list
*list
;
6902 if (pdi
->is_external
)
6903 list
= &objfile
->global_psymbols
;
6905 list
= &objfile
->static_psymbols
;
6906 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6907 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6908 list
, 0, 0, cu
->language
, objfile
);
6911 case DW_TAG_variable
:
6913 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6917 && !dwarf2_per_objfile
->has_section_at_zero
)
6919 /* A global or static variable may also have been stripped
6920 out by the linker if unused, in which case its address
6921 will be nullified; do not add such variables into partial
6922 symbol table then. */
6924 else if (pdi
->is_external
)
6927 Don't enter into the minimal symbol tables as there is
6928 a minimal symbol table entry from the ELF symbols already.
6929 Enter into partial symbol table if it has a location
6930 descriptor or a type.
6931 If the location descriptor is missing, new_symbol will create
6932 a LOC_UNRESOLVED symbol, the address of the variable will then
6933 be determined from the minimal symbol table whenever the variable
6935 The address for the partial symbol table entry is not
6936 used by GDB, but it comes in handy for debugging partial symbol
6939 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6940 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6941 built_actual_name
!= NULL
,
6942 VAR_DOMAIN
, LOC_STATIC
,
6943 &objfile
->global_psymbols
,
6945 cu
->language
, objfile
);
6949 /* Static Variable. Skip symbols without location descriptors. */
6950 if (pdi
->d
.locdesc
== NULL
)
6952 xfree (built_actual_name
);
6955 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6956 mst_file_data, objfile); */
6957 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6958 built_actual_name
!= NULL
,
6959 VAR_DOMAIN
, LOC_STATIC
,
6960 &objfile
->static_psymbols
,
6962 cu
->language
, objfile
);
6965 case DW_TAG_typedef
:
6966 case DW_TAG_base_type
:
6967 case DW_TAG_subrange_type
:
6968 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6969 built_actual_name
!= NULL
,
6970 VAR_DOMAIN
, LOC_TYPEDEF
,
6971 &objfile
->static_psymbols
,
6972 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6974 case DW_TAG_imported_declaration
:
6975 case DW_TAG_namespace
:
6976 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6977 built_actual_name
!= NULL
,
6978 VAR_DOMAIN
, LOC_TYPEDEF
,
6979 &objfile
->global_psymbols
,
6980 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6983 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6984 built_actual_name
!= NULL
,
6985 MODULE_DOMAIN
, LOC_TYPEDEF
,
6986 &objfile
->global_psymbols
,
6987 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6989 case DW_TAG_class_type
:
6990 case DW_TAG_interface_type
:
6991 case DW_TAG_structure_type
:
6992 case DW_TAG_union_type
:
6993 case DW_TAG_enumeration_type
:
6994 /* Skip external references. The DWARF standard says in the section
6995 about "Structure, Union, and Class Type Entries": "An incomplete
6996 structure, union or class type is represented by a structure,
6997 union or class entry that does not have a byte size attribute
6998 and that has a DW_AT_declaration attribute." */
6999 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7001 xfree (built_actual_name
);
7005 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7006 static vs. global. */
7007 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7008 built_actual_name
!= NULL
,
7009 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7010 (cu
->language
== language_cplus
7011 || cu
->language
== language_java
)
7012 ? &objfile
->global_psymbols
7013 : &objfile
->static_psymbols
,
7014 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7017 case DW_TAG_enumerator
:
7018 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7019 built_actual_name
!= NULL
,
7020 VAR_DOMAIN
, LOC_CONST
,
7021 (cu
->language
== language_cplus
7022 || cu
->language
== language_java
)
7023 ? &objfile
->global_psymbols
7024 : &objfile
->static_psymbols
,
7025 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7031 xfree (built_actual_name
);
7034 /* Read a partial die corresponding to a namespace; also, add a symbol
7035 corresponding to that namespace to the symbol table. NAMESPACE is
7036 the name of the enclosing namespace. */
7039 add_partial_namespace (struct partial_die_info
*pdi
,
7040 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7041 int set_addrmap
, struct dwarf2_cu
*cu
)
7043 /* Add a symbol for the namespace. */
7045 add_partial_symbol (pdi
, cu
);
7047 /* Now scan partial symbols in that namespace. */
7049 if (pdi
->has_children
)
7050 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7053 /* Read a partial die corresponding to a Fortran module. */
7056 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7057 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7059 /* Add a symbol for the namespace. */
7061 add_partial_symbol (pdi
, cu
);
7063 /* Now scan partial symbols in that module. */
7065 if (pdi
->has_children
)
7066 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7069 /* Read a partial die corresponding to a subprogram and create a partial
7070 symbol for that subprogram. When the CU language allows it, this
7071 routine also defines a partial symbol for each nested subprogram
7072 that this subprogram contains. If SET_ADDRMAP is true, record the
7073 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7074 and highest PC values found in PDI.
7076 PDI may also be a lexical block, in which case we simply search
7077 recursively for subprograms defined inside that lexical block.
7078 Again, this is only performed when the CU language allows this
7079 type of definitions. */
7082 add_partial_subprogram (struct partial_die_info
*pdi
,
7083 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7084 int set_addrmap
, struct dwarf2_cu
*cu
)
7086 if (pdi
->tag
== DW_TAG_subprogram
)
7088 if (pdi
->has_pc_info
)
7090 if (pdi
->lowpc
< *lowpc
)
7091 *lowpc
= pdi
->lowpc
;
7092 if (pdi
->highpc
> *highpc
)
7093 *highpc
= pdi
->highpc
;
7096 struct objfile
*objfile
= cu
->objfile
;
7097 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7102 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7103 SECT_OFF_TEXT (objfile
));
7104 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7105 pdi
->lowpc
+ baseaddr
);
7106 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7107 pdi
->highpc
+ baseaddr
);
7108 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7109 cu
->per_cu
->v
.psymtab
);
7113 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7115 if (!pdi
->is_declaration
)
7116 /* Ignore subprogram DIEs that do not have a name, they are
7117 illegal. Do not emit a complaint at this point, we will
7118 do so when we convert this psymtab into a symtab. */
7120 add_partial_symbol (pdi
, cu
);
7124 if (! pdi
->has_children
)
7127 if (cu
->language
== language_ada
)
7129 pdi
= pdi
->die_child
;
7132 fixup_partial_die (pdi
, cu
);
7133 if (pdi
->tag
== DW_TAG_subprogram
7134 || pdi
->tag
== DW_TAG_lexical_block
)
7135 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7136 pdi
= pdi
->die_sibling
;
7141 /* Read a partial die corresponding to an enumeration type. */
7144 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7145 struct dwarf2_cu
*cu
)
7147 struct partial_die_info
*pdi
;
7149 if (enum_pdi
->name
!= NULL
)
7150 add_partial_symbol (enum_pdi
, cu
);
7152 pdi
= enum_pdi
->die_child
;
7155 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7156 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7158 add_partial_symbol (pdi
, cu
);
7159 pdi
= pdi
->die_sibling
;
7163 /* Return the initial uleb128 in the die at INFO_PTR. */
7166 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7168 unsigned int bytes_read
;
7170 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7173 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7174 Return the corresponding abbrev, or NULL if the number is zero (indicating
7175 an empty DIE). In either case *BYTES_READ will be set to the length of
7176 the initial number. */
7178 static struct abbrev_info
*
7179 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7180 struct dwarf2_cu
*cu
)
7182 bfd
*abfd
= cu
->objfile
->obfd
;
7183 unsigned int abbrev_number
;
7184 struct abbrev_info
*abbrev
;
7186 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7188 if (abbrev_number
== 0)
7191 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7194 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7195 " at offset 0x%x [in module %s]"),
7196 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7197 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7203 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7204 Returns a pointer to the end of a series of DIEs, terminated by an empty
7205 DIE. Any children of the skipped DIEs will also be skipped. */
7207 static const gdb_byte
*
7208 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7210 struct dwarf2_cu
*cu
= reader
->cu
;
7211 struct abbrev_info
*abbrev
;
7212 unsigned int bytes_read
;
7216 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7218 return info_ptr
+ bytes_read
;
7220 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7224 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7225 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7226 abbrev corresponding to that skipped uleb128 should be passed in
7227 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7230 static const gdb_byte
*
7231 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7232 struct abbrev_info
*abbrev
)
7234 unsigned int bytes_read
;
7235 struct attribute attr
;
7236 bfd
*abfd
= reader
->abfd
;
7237 struct dwarf2_cu
*cu
= reader
->cu
;
7238 const gdb_byte
*buffer
= reader
->buffer
;
7239 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7240 const gdb_byte
*start_info_ptr
= info_ptr
;
7241 unsigned int form
, i
;
7243 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7245 /* The only abbrev we care about is DW_AT_sibling. */
7246 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7248 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7249 if (attr
.form
== DW_FORM_ref_addr
)
7250 complaint (&symfile_complaints
,
7251 _("ignoring absolute DW_AT_sibling"));
7254 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7255 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7257 if (sibling_ptr
< info_ptr
)
7258 complaint (&symfile_complaints
,
7259 _("DW_AT_sibling points backwards"));
7260 else if (sibling_ptr
> reader
->buffer_end
)
7261 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7267 /* If it isn't DW_AT_sibling, skip this attribute. */
7268 form
= abbrev
->attrs
[i
].form
;
7272 case DW_FORM_ref_addr
:
7273 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7274 and later it is offset sized. */
7275 if (cu
->header
.version
== 2)
7276 info_ptr
+= cu
->header
.addr_size
;
7278 info_ptr
+= cu
->header
.offset_size
;
7280 case DW_FORM_GNU_ref_alt
:
7281 info_ptr
+= cu
->header
.offset_size
;
7284 info_ptr
+= cu
->header
.addr_size
;
7291 case DW_FORM_flag_present
:
7303 case DW_FORM_ref_sig8
:
7306 case DW_FORM_string
:
7307 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7308 info_ptr
+= bytes_read
;
7310 case DW_FORM_sec_offset
:
7312 case DW_FORM_GNU_strp_alt
:
7313 info_ptr
+= cu
->header
.offset_size
;
7315 case DW_FORM_exprloc
:
7317 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7318 info_ptr
+= bytes_read
;
7320 case DW_FORM_block1
:
7321 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7323 case DW_FORM_block2
:
7324 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7326 case DW_FORM_block4
:
7327 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7331 case DW_FORM_ref_udata
:
7332 case DW_FORM_GNU_addr_index
:
7333 case DW_FORM_GNU_str_index
:
7334 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7336 case DW_FORM_indirect
:
7337 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7338 info_ptr
+= bytes_read
;
7339 /* We need to continue parsing from here, so just go back to
7341 goto skip_attribute
;
7344 error (_("Dwarf Error: Cannot handle %s "
7345 "in DWARF reader [in module %s]"),
7346 dwarf_form_name (form
),
7347 bfd_get_filename (abfd
));
7351 if (abbrev
->has_children
)
7352 return skip_children (reader
, info_ptr
);
7357 /* Locate ORIG_PDI's sibling.
7358 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7360 static const gdb_byte
*
7361 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7362 struct partial_die_info
*orig_pdi
,
7363 const gdb_byte
*info_ptr
)
7365 /* Do we know the sibling already? */
7367 if (orig_pdi
->sibling
)
7368 return orig_pdi
->sibling
;
7370 /* Are there any children to deal with? */
7372 if (!orig_pdi
->has_children
)
7375 /* Skip the children the long way. */
7377 return skip_children (reader
, info_ptr
);
7380 /* Expand this partial symbol table into a full symbol table. SELF is
7384 dwarf2_read_symtab (struct partial_symtab
*self
,
7385 struct objfile
*objfile
)
7389 warning (_("bug: psymtab for %s is already read in."),
7396 printf_filtered (_("Reading in symbols for %s..."),
7398 gdb_flush (gdb_stdout
);
7401 /* Restore our global data. */
7402 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7404 /* If this psymtab is constructed from a debug-only objfile, the
7405 has_section_at_zero flag will not necessarily be correct. We
7406 can get the correct value for this flag by looking at the data
7407 associated with the (presumably stripped) associated objfile. */
7408 if (objfile
->separate_debug_objfile_backlink
)
7410 struct dwarf2_per_objfile
*dpo_backlink
7411 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7412 dwarf2_objfile_data_key
);
7414 dwarf2_per_objfile
->has_section_at_zero
7415 = dpo_backlink
->has_section_at_zero
;
7418 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7420 psymtab_to_symtab_1 (self
);
7422 /* Finish up the debug error message. */
7424 printf_filtered (_("done.\n"));
7427 process_cu_includes ();
7430 /* Reading in full CUs. */
7432 /* Add PER_CU to the queue. */
7435 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7436 enum language pretend_language
)
7438 struct dwarf2_queue_item
*item
;
7441 item
= xmalloc (sizeof (*item
));
7442 item
->per_cu
= per_cu
;
7443 item
->pretend_language
= pretend_language
;
7446 if (dwarf2_queue
== NULL
)
7447 dwarf2_queue
= item
;
7449 dwarf2_queue_tail
->next
= item
;
7451 dwarf2_queue_tail
= item
;
7454 /* If PER_CU is not yet queued, add it to the queue.
7455 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7457 The result is non-zero if PER_CU was queued, otherwise the result is zero
7458 meaning either PER_CU is already queued or it is already loaded.
7460 N.B. There is an invariant here that if a CU is queued then it is loaded.
7461 The caller is required to load PER_CU if we return non-zero. */
7464 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7465 struct dwarf2_per_cu_data
*per_cu
,
7466 enum language pretend_language
)
7468 /* We may arrive here during partial symbol reading, if we need full
7469 DIEs to process an unusual case (e.g. template arguments). Do
7470 not queue PER_CU, just tell our caller to load its DIEs. */
7471 if (dwarf2_per_objfile
->reading_partial_symbols
)
7473 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7478 /* Mark the dependence relation so that we don't flush PER_CU
7480 if (dependent_cu
!= NULL
)
7481 dwarf2_add_dependence (dependent_cu
, per_cu
);
7483 /* If it's already on the queue, we have nothing to do. */
7487 /* If the compilation unit is already loaded, just mark it as
7489 if (per_cu
->cu
!= NULL
)
7491 per_cu
->cu
->last_used
= 0;
7495 /* Add it to the queue. */
7496 queue_comp_unit (per_cu
, pretend_language
);
7501 /* Process the queue. */
7504 process_queue (void)
7506 struct dwarf2_queue_item
*item
, *next_item
;
7508 if (dwarf2_read_debug
)
7510 fprintf_unfiltered (gdb_stdlog
,
7511 "Expanding one or more symtabs of objfile %s ...\n",
7512 objfile_name (dwarf2_per_objfile
->objfile
));
7515 /* The queue starts out with one item, but following a DIE reference
7516 may load a new CU, adding it to the end of the queue. */
7517 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7519 if (dwarf2_per_objfile
->using_index
7520 ? !item
->per_cu
->v
.quick
->compunit_symtab
7521 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7523 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7524 unsigned int debug_print_threshold
;
7527 if (per_cu
->is_debug_types
)
7529 struct signatured_type
*sig_type
=
7530 (struct signatured_type
*) per_cu
;
7532 sprintf (buf
, "TU %s at offset 0x%x",
7533 hex_string (sig_type
->signature
),
7534 per_cu
->offset
.sect_off
);
7535 /* There can be 100s of TUs.
7536 Only print them in verbose mode. */
7537 debug_print_threshold
= 2;
7541 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7542 debug_print_threshold
= 1;
7545 if (dwarf2_read_debug
>= debug_print_threshold
)
7546 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7548 if (per_cu
->is_debug_types
)
7549 process_full_type_unit (per_cu
, item
->pretend_language
);
7551 process_full_comp_unit (per_cu
, item
->pretend_language
);
7553 if (dwarf2_read_debug
>= debug_print_threshold
)
7554 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7557 item
->per_cu
->queued
= 0;
7558 next_item
= item
->next
;
7562 dwarf2_queue_tail
= NULL
;
7564 if (dwarf2_read_debug
)
7566 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7567 objfile_name (dwarf2_per_objfile
->objfile
));
7571 /* Free all allocated queue entries. This function only releases anything if
7572 an error was thrown; if the queue was processed then it would have been
7573 freed as we went along. */
7576 dwarf2_release_queue (void *dummy
)
7578 struct dwarf2_queue_item
*item
, *last
;
7580 item
= dwarf2_queue
;
7583 /* Anything still marked queued is likely to be in an
7584 inconsistent state, so discard it. */
7585 if (item
->per_cu
->queued
)
7587 if (item
->per_cu
->cu
!= NULL
)
7588 free_one_cached_comp_unit (item
->per_cu
);
7589 item
->per_cu
->queued
= 0;
7597 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7600 /* Read in full symbols for PST, and anything it depends on. */
7603 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7605 struct dwarf2_per_cu_data
*per_cu
;
7611 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7612 if (!pst
->dependencies
[i
]->readin
7613 && pst
->dependencies
[i
]->user
== NULL
)
7615 /* Inform about additional files that need to be read in. */
7618 /* FIXME: i18n: Need to make this a single string. */
7619 fputs_filtered (" ", gdb_stdout
);
7621 fputs_filtered ("and ", gdb_stdout
);
7623 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7624 wrap_here (""); /* Flush output. */
7625 gdb_flush (gdb_stdout
);
7627 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7630 per_cu
= pst
->read_symtab_private
;
7634 /* It's an include file, no symbols to read for it.
7635 Everything is in the parent symtab. */
7640 dw2_do_instantiate_symtab (per_cu
);
7643 /* Trivial hash function for die_info: the hash value of a DIE
7644 is its offset in .debug_info for this objfile. */
7647 die_hash (const void *item
)
7649 const struct die_info
*die
= item
;
7651 return die
->offset
.sect_off
;
7654 /* Trivial comparison function for die_info structures: two DIEs
7655 are equal if they have the same offset. */
7658 die_eq (const void *item_lhs
, const void *item_rhs
)
7660 const struct die_info
*die_lhs
= item_lhs
;
7661 const struct die_info
*die_rhs
= item_rhs
;
7663 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7666 /* die_reader_func for load_full_comp_unit.
7667 This is identical to read_signatured_type_reader,
7668 but is kept separate for now. */
7671 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7672 const gdb_byte
*info_ptr
,
7673 struct die_info
*comp_unit_die
,
7677 struct dwarf2_cu
*cu
= reader
->cu
;
7678 enum language
*language_ptr
= data
;
7680 gdb_assert (cu
->die_hash
== NULL
);
7682 htab_create_alloc_ex (cu
->header
.length
/ 12,
7686 &cu
->comp_unit_obstack
,
7687 hashtab_obstack_allocate
,
7688 dummy_obstack_deallocate
);
7691 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7692 &info_ptr
, comp_unit_die
);
7693 cu
->dies
= comp_unit_die
;
7694 /* comp_unit_die is not stored in die_hash, no need. */
7696 /* We try not to read any attributes in this function, because not
7697 all CUs needed for references have been loaded yet, and symbol
7698 table processing isn't initialized. But we have to set the CU language,
7699 or we won't be able to build types correctly.
7700 Similarly, if we do not read the producer, we can not apply
7701 producer-specific interpretation. */
7702 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7705 /* Load the DIEs associated with PER_CU into memory. */
7708 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7709 enum language pretend_language
)
7711 gdb_assert (! this_cu
->is_debug_types
);
7713 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7714 load_full_comp_unit_reader
, &pretend_language
);
7717 /* Add a DIE to the delayed physname list. */
7720 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7721 const char *name
, struct die_info
*die
,
7722 struct dwarf2_cu
*cu
)
7724 struct delayed_method_info mi
;
7726 mi
.fnfield_index
= fnfield_index
;
7730 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7733 /* A cleanup for freeing the delayed method list. */
7736 free_delayed_list (void *ptr
)
7738 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7739 if (cu
->method_list
!= NULL
)
7741 VEC_free (delayed_method_info
, cu
->method_list
);
7742 cu
->method_list
= NULL
;
7746 /* Compute the physnames of any methods on the CU's method list.
7748 The computation of method physnames is delayed in order to avoid the
7749 (bad) condition that one of the method's formal parameters is of an as yet
7753 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7756 struct delayed_method_info
*mi
;
7757 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7759 const char *physname
;
7760 struct fn_fieldlist
*fn_flp
7761 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7762 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7763 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7764 = physname
? physname
: "";
7768 /* Go objects should be embedded in a DW_TAG_module DIE,
7769 and it's not clear if/how imported objects will appear.
7770 To keep Go support simple until that's worked out,
7771 go back through what we've read and create something usable.
7772 We could do this while processing each DIE, and feels kinda cleaner,
7773 but that way is more invasive.
7774 This is to, for example, allow the user to type "p var" or "b main"
7775 without having to specify the package name, and allow lookups
7776 of module.object to work in contexts that use the expression
7780 fixup_go_packaging (struct dwarf2_cu
*cu
)
7782 char *package_name
= NULL
;
7783 struct pending
*list
;
7786 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7788 for (i
= 0; i
< list
->nsyms
; ++i
)
7790 struct symbol
*sym
= list
->symbol
[i
];
7792 if (SYMBOL_LANGUAGE (sym
) == language_go
7793 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7795 char *this_package_name
= go_symbol_package_name (sym
);
7797 if (this_package_name
== NULL
)
7799 if (package_name
== NULL
)
7800 package_name
= this_package_name
;
7803 if (strcmp (package_name
, this_package_name
) != 0)
7804 complaint (&symfile_complaints
,
7805 _("Symtab %s has objects from two different Go packages: %s and %s"),
7806 (symbol_symtab (sym
) != NULL
7807 ? symtab_to_filename_for_display
7808 (symbol_symtab (sym
))
7809 : objfile_name (cu
->objfile
)),
7810 this_package_name
, package_name
);
7811 xfree (this_package_name
);
7817 if (package_name
!= NULL
)
7819 struct objfile
*objfile
= cu
->objfile
;
7820 const char *saved_package_name
7821 = obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7823 strlen (package_name
));
7824 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7825 saved_package_name
, objfile
);
7828 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7830 sym
= allocate_symbol (objfile
);
7831 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7832 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7833 strlen (saved_package_name
), 0, objfile
);
7834 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7835 e.g., "main" finds the "main" module and not C's main(). */
7836 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7837 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7838 SYMBOL_TYPE (sym
) = type
;
7840 add_symbol_to_list (sym
, &global_symbols
);
7842 xfree (package_name
);
7846 /* Return the symtab for PER_CU. This works properly regardless of
7847 whether we're using the index or psymtabs. */
7849 static struct compunit_symtab
*
7850 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7852 return (dwarf2_per_objfile
->using_index
7853 ? per_cu
->v
.quick
->compunit_symtab
7854 : per_cu
->v
.psymtab
->compunit_symtab
);
7857 /* A helper function for computing the list of all symbol tables
7858 included by PER_CU. */
7861 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7862 htab_t all_children
, htab_t all_type_symtabs
,
7863 struct dwarf2_per_cu_data
*per_cu
,
7864 struct compunit_symtab
*immediate_parent
)
7868 struct compunit_symtab
*cust
;
7869 struct dwarf2_per_cu_data
*iter
;
7871 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7874 /* This inclusion and its children have been processed. */
7879 /* Only add a CU if it has a symbol table. */
7880 cust
= get_compunit_symtab (per_cu
);
7883 /* If this is a type unit only add its symbol table if we haven't
7884 seen it yet (type unit per_cu's can share symtabs). */
7885 if (per_cu
->is_debug_types
)
7887 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7891 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7892 if (cust
->user
== NULL
)
7893 cust
->user
= immediate_parent
;
7898 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7899 if (cust
->user
== NULL
)
7900 cust
->user
= immediate_parent
;
7905 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7908 recursively_compute_inclusions (result
, all_children
,
7909 all_type_symtabs
, iter
, cust
);
7913 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7917 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7919 gdb_assert (! per_cu
->is_debug_types
);
7921 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7924 struct dwarf2_per_cu_data
*per_cu_iter
;
7925 struct compunit_symtab
*compunit_symtab_iter
;
7926 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7927 htab_t all_children
, all_type_symtabs
;
7928 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7930 /* If we don't have a symtab, we can just skip this case. */
7934 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7935 NULL
, xcalloc
, xfree
);
7936 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7937 NULL
, xcalloc
, xfree
);
7940 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7944 recursively_compute_inclusions (&result_symtabs
, all_children
,
7945 all_type_symtabs
, per_cu_iter
,
7949 /* Now we have a transitive closure of all the included symtabs. */
7950 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7952 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7953 (len
+ 1) * sizeof (struct symtab
*));
7955 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7956 compunit_symtab_iter
);
7958 cust
->includes
[ix
] = compunit_symtab_iter
;
7959 cust
->includes
[len
] = NULL
;
7961 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7962 htab_delete (all_children
);
7963 htab_delete (all_type_symtabs
);
7967 /* Compute the 'includes' field for the symtabs of all the CUs we just
7971 process_cu_includes (void)
7974 struct dwarf2_per_cu_data
*iter
;
7977 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
7981 if (! iter
->is_debug_types
)
7982 compute_compunit_symtab_includes (iter
);
7985 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
7988 /* Generate full symbol information for PER_CU, whose DIEs have
7989 already been loaded into memory. */
7992 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7993 enum language pretend_language
)
7995 struct dwarf2_cu
*cu
= per_cu
->cu
;
7996 struct objfile
*objfile
= per_cu
->objfile
;
7997 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7998 CORE_ADDR lowpc
, highpc
;
7999 struct compunit_symtab
*cust
;
8000 struct cleanup
*back_to
, *delayed_list_cleanup
;
8002 struct block
*static_block
;
8005 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8008 back_to
= make_cleanup (really_free_pendings
, NULL
);
8009 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8011 cu
->list_in_scope
= &file_symbols
;
8013 cu
->language
= pretend_language
;
8014 cu
->language_defn
= language_def (cu
->language
);
8016 /* Do line number decoding in read_file_scope () */
8017 process_die (cu
->dies
, cu
);
8019 /* For now fudge the Go package. */
8020 if (cu
->language
== language_go
)
8021 fixup_go_packaging (cu
);
8023 /* Now that we have processed all the DIEs in the CU, all the types
8024 should be complete, and it should now be safe to compute all of the
8026 compute_delayed_physnames (cu
);
8027 do_cleanups (delayed_list_cleanup
);
8029 /* Some compilers don't define a DW_AT_high_pc attribute for the
8030 compilation unit. If the DW_AT_high_pc is missing, synthesize
8031 it, by scanning the DIE's below the compilation unit. */
8032 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8034 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8035 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8037 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8038 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8039 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8040 addrmap to help ensure it has an accurate map of pc values belonging to
8042 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8044 cust
= end_symtab_from_static_block (static_block
,
8045 SECT_OFF_TEXT (objfile
), 0);
8049 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8051 /* Set symtab language to language from DW_AT_language. If the
8052 compilation is from a C file generated by language preprocessors, do
8053 not set the language if it was already deduced by start_subfile. */
8054 if (!(cu
->language
== language_c
8055 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8056 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8058 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8059 produce DW_AT_location with location lists but it can be possibly
8060 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8061 there were bugs in prologue debug info, fixed later in GCC-4.5
8062 by "unwind info for epilogues" patch (which is not directly related).
8064 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8065 needed, it would be wrong due to missing DW_AT_producer there.
8067 Still one can confuse GDB by using non-standard GCC compilation
8068 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8070 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8071 cust
->locations_valid
= 1;
8073 if (gcc_4_minor
>= 5)
8074 cust
->epilogue_unwind_valid
= 1;
8076 cust
->call_site_htab
= cu
->call_site_htab
;
8079 if (dwarf2_per_objfile
->using_index
)
8080 per_cu
->v
.quick
->compunit_symtab
= cust
;
8083 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8084 pst
->compunit_symtab
= cust
;
8088 /* Push it for inclusion processing later. */
8089 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8091 do_cleanups (back_to
);
8094 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8095 already been loaded into memory. */
8098 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8099 enum language pretend_language
)
8101 struct dwarf2_cu
*cu
= per_cu
->cu
;
8102 struct objfile
*objfile
= per_cu
->objfile
;
8103 struct compunit_symtab
*cust
;
8104 struct cleanup
*back_to
, *delayed_list_cleanup
;
8105 struct signatured_type
*sig_type
;
8107 gdb_assert (per_cu
->is_debug_types
);
8108 sig_type
= (struct signatured_type
*) per_cu
;
8111 back_to
= make_cleanup (really_free_pendings
, NULL
);
8112 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8114 cu
->list_in_scope
= &file_symbols
;
8116 cu
->language
= pretend_language
;
8117 cu
->language_defn
= language_def (cu
->language
);
8119 /* The symbol tables are set up in read_type_unit_scope. */
8120 process_die (cu
->dies
, cu
);
8122 /* For now fudge the Go package. */
8123 if (cu
->language
== language_go
)
8124 fixup_go_packaging (cu
);
8126 /* Now that we have processed all the DIEs in the CU, all the types
8127 should be complete, and it should now be safe to compute all of the
8129 compute_delayed_physnames (cu
);
8130 do_cleanups (delayed_list_cleanup
);
8132 /* TUs share symbol tables.
8133 If this is the first TU to use this symtab, complete the construction
8134 of it with end_expandable_symtab. Otherwise, complete the addition of
8135 this TU's symbols to the existing symtab. */
8136 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8138 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8139 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8143 /* Set symtab language to language from DW_AT_language. If the
8144 compilation is from a C file generated by language preprocessors,
8145 do not set the language if it was already deduced by
8147 if (!(cu
->language
== language_c
8148 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8149 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8154 augment_type_symtab ();
8155 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8158 if (dwarf2_per_objfile
->using_index
)
8159 per_cu
->v
.quick
->compunit_symtab
= cust
;
8162 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8163 pst
->compunit_symtab
= cust
;
8167 do_cleanups (back_to
);
8170 /* Process an imported unit DIE. */
8173 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8175 struct attribute
*attr
;
8177 /* For now we don't handle imported units in type units. */
8178 if (cu
->per_cu
->is_debug_types
)
8180 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8181 " supported in type units [in module %s]"),
8182 objfile_name (cu
->objfile
));
8185 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8188 struct dwarf2_per_cu_data
*per_cu
;
8189 struct symtab
*imported_symtab
;
8193 offset
= dwarf2_get_ref_die_offset (attr
);
8194 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8195 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8197 /* If necessary, add it to the queue and load its DIEs. */
8198 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8199 load_full_comp_unit (per_cu
, cu
->language
);
8201 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8206 /* Reset the in_process bit of a die. */
8209 reset_die_in_process (void *arg
)
8211 struct die_info
*die
= arg
;
8213 die
->in_process
= 0;
8216 /* Process a die and its children. */
8219 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8221 struct cleanup
*in_process
;
8223 /* We should only be processing those not already in process. */
8224 gdb_assert (!die
->in_process
);
8226 die
->in_process
= 1;
8227 in_process
= make_cleanup (reset_die_in_process
,die
);
8231 case DW_TAG_padding
:
8233 case DW_TAG_compile_unit
:
8234 case DW_TAG_partial_unit
:
8235 read_file_scope (die
, cu
);
8237 case DW_TAG_type_unit
:
8238 read_type_unit_scope (die
, cu
);
8240 case DW_TAG_subprogram
:
8241 case DW_TAG_inlined_subroutine
:
8242 read_func_scope (die
, cu
);
8244 case DW_TAG_lexical_block
:
8245 case DW_TAG_try_block
:
8246 case DW_TAG_catch_block
:
8247 read_lexical_block_scope (die
, cu
);
8249 case DW_TAG_GNU_call_site
:
8250 read_call_site_scope (die
, cu
);
8252 case DW_TAG_class_type
:
8253 case DW_TAG_interface_type
:
8254 case DW_TAG_structure_type
:
8255 case DW_TAG_union_type
:
8256 process_structure_scope (die
, cu
);
8258 case DW_TAG_enumeration_type
:
8259 process_enumeration_scope (die
, cu
);
8262 /* These dies have a type, but processing them does not create
8263 a symbol or recurse to process the children. Therefore we can
8264 read them on-demand through read_type_die. */
8265 case DW_TAG_subroutine_type
:
8266 case DW_TAG_set_type
:
8267 case DW_TAG_array_type
:
8268 case DW_TAG_pointer_type
:
8269 case DW_TAG_ptr_to_member_type
:
8270 case DW_TAG_reference_type
:
8271 case DW_TAG_string_type
:
8274 case DW_TAG_base_type
:
8275 case DW_TAG_subrange_type
:
8276 case DW_TAG_typedef
:
8277 /* Add a typedef symbol for the type definition, if it has a
8279 new_symbol (die
, read_type_die (die
, cu
), cu
);
8281 case DW_TAG_common_block
:
8282 read_common_block (die
, cu
);
8284 case DW_TAG_common_inclusion
:
8286 case DW_TAG_namespace
:
8287 cu
->processing_has_namespace_info
= 1;
8288 read_namespace (die
, cu
);
8291 cu
->processing_has_namespace_info
= 1;
8292 read_module (die
, cu
);
8294 case DW_TAG_imported_declaration
:
8295 cu
->processing_has_namespace_info
= 1;
8296 if (read_namespace_alias (die
, cu
))
8298 /* The declaration is not a global namespace alias: fall through. */
8299 case DW_TAG_imported_module
:
8300 cu
->processing_has_namespace_info
= 1;
8301 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8302 || cu
->language
!= language_fortran
))
8303 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8304 dwarf_tag_name (die
->tag
));
8305 read_import_statement (die
, cu
);
8308 case DW_TAG_imported_unit
:
8309 process_imported_unit_die (die
, cu
);
8313 new_symbol (die
, NULL
, cu
);
8317 do_cleanups (in_process
);
8320 /* DWARF name computation. */
8322 /* A helper function for dwarf2_compute_name which determines whether DIE
8323 needs to have the name of the scope prepended to the name listed in the
8327 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8329 struct attribute
*attr
;
8333 case DW_TAG_namespace
:
8334 case DW_TAG_typedef
:
8335 case DW_TAG_class_type
:
8336 case DW_TAG_interface_type
:
8337 case DW_TAG_structure_type
:
8338 case DW_TAG_union_type
:
8339 case DW_TAG_enumeration_type
:
8340 case DW_TAG_enumerator
:
8341 case DW_TAG_subprogram
:
8343 case DW_TAG_imported_declaration
:
8346 case DW_TAG_variable
:
8347 case DW_TAG_constant
:
8348 /* We only need to prefix "globally" visible variables. These include
8349 any variable marked with DW_AT_external or any variable that
8350 lives in a namespace. [Variables in anonymous namespaces
8351 require prefixing, but they are not DW_AT_external.] */
8353 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8355 struct dwarf2_cu
*spec_cu
= cu
;
8357 return die_needs_namespace (die_specification (die
, &spec_cu
),
8361 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8362 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8363 && die
->parent
->tag
!= DW_TAG_module
)
8365 /* A variable in a lexical block of some kind does not need a
8366 namespace, even though in C++ such variables may be external
8367 and have a mangled name. */
8368 if (die
->parent
->tag
== DW_TAG_lexical_block
8369 || die
->parent
->tag
== DW_TAG_try_block
8370 || die
->parent
->tag
== DW_TAG_catch_block
8371 || die
->parent
->tag
== DW_TAG_subprogram
)
8380 /* Retrieve the last character from a mem_file. */
8383 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8385 char *last_char_p
= (char *) object
;
8388 *last_char_p
= buffer
[length
- 1];
8391 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8392 compute the physname for the object, which include a method's:
8393 - formal parameters (C++/Java),
8394 - receiver type (Go),
8395 - return type (Java).
8397 The term "physname" is a bit confusing.
8398 For C++, for example, it is the demangled name.
8399 For Go, for example, it's the mangled name.
8401 For Ada, return the DIE's linkage name rather than the fully qualified
8402 name. PHYSNAME is ignored..
8404 The result is allocated on the objfile_obstack and canonicalized. */
8407 dwarf2_compute_name (const char *name
,
8408 struct die_info
*die
, struct dwarf2_cu
*cu
,
8411 struct objfile
*objfile
= cu
->objfile
;
8414 name
= dwarf2_name (die
, cu
);
8416 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8417 compute it by typename_concat inside GDB. */
8418 if (cu
->language
== language_ada
8419 || (cu
->language
== language_fortran
&& physname
))
8421 /* For Ada unit, we prefer the linkage name over the name, as
8422 the former contains the exported name, which the user expects
8423 to be able to reference. Ideally, we want the user to be able
8424 to reference this entity using either natural or linkage name,
8425 but we haven't started looking at this enhancement yet. */
8426 struct attribute
*attr
;
8428 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8430 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8431 if (attr
&& DW_STRING (attr
))
8432 return DW_STRING (attr
);
8435 /* These are the only languages we know how to qualify names in. */
8437 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8438 || cu
->language
== language_fortran
))
8440 if (die_needs_namespace (die
, cu
))
8444 struct ui_file
*buf
;
8445 char *intermediate_name
;
8446 const char *canonical_name
= NULL
;
8448 prefix
= determine_prefix (die
, cu
);
8449 buf
= mem_fileopen ();
8450 if (*prefix
!= '\0')
8452 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8455 fputs_unfiltered (prefixed_name
, buf
);
8456 xfree (prefixed_name
);
8459 fputs_unfiltered (name
, buf
);
8461 /* Template parameters may be specified in the DIE's DW_AT_name, or
8462 as children with DW_TAG_template_type_param or
8463 DW_TAG_value_type_param. If the latter, add them to the name
8464 here. If the name already has template parameters, then
8465 skip this step; some versions of GCC emit both, and
8466 it is more efficient to use the pre-computed name.
8468 Something to keep in mind about this process: it is very
8469 unlikely, or in some cases downright impossible, to produce
8470 something that will match the mangled name of a function.
8471 If the definition of the function has the same debug info,
8472 we should be able to match up with it anyway. But fallbacks
8473 using the minimal symbol, for instance to find a method
8474 implemented in a stripped copy of libstdc++, will not work.
8475 If we do not have debug info for the definition, we will have to
8476 match them up some other way.
8478 When we do name matching there is a related problem with function
8479 templates; two instantiated function templates are allowed to
8480 differ only by their return types, which we do not add here. */
8482 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8484 struct attribute
*attr
;
8485 struct die_info
*child
;
8488 die
->building_fullname
= 1;
8490 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8494 const gdb_byte
*bytes
;
8495 struct dwarf2_locexpr_baton
*baton
;
8498 if (child
->tag
!= DW_TAG_template_type_param
8499 && child
->tag
!= DW_TAG_template_value_param
)
8504 fputs_unfiltered ("<", buf
);
8508 fputs_unfiltered (", ", buf
);
8510 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8513 complaint (&symfile_complaints
,
8514 _("template parameter missing DW_AT_type"));
8515 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8518 type
= die_type (child
, cu
);
8520 if (child
->tag
== DW_TAG_template_type_param
)
8522 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8526 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8529 complaint (&symfile_complaints
,
8530 _("template parameter missing "
8531 "DW_AT_const_value"));
8532 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8536 dwarf2_const_value_attr (attr
, type
, name
,
8537 &cu
->comp_unit_obstack
, cu
,
8538 &value
, &bytes
, &baton
);
8540 if (TYPE_NOSIGN (type
))
8541 /* GDB prints characters as NUMBER 'CHAR'. If that's
8542 changed, this can use value_print instead. */
8543 c_printchar (value
, type
, buf
);
8546 struct value_print_options opts
;
8549 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8553 else if (bytes
!= NULL
)
8555 v
= allocate_value (type
);
8556 memcpy (value_contents_writeable (v
), bytes
,
8557 TYPE_LENGTH (type
));
8560 v
= value_from_longest (type
, value
);
8562 /* Specify decimal so that we do not depend on
8564 get_formatted_print_options (&opts
, 'd');
8566 value_print (v
, buf
, &opts
);
8572 die
->building_fullname
= 0;
8576 /* Close the argument list, with a space if necessary
8577 (nested templates). */
8578 char last_char
= '\0';
8579 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8580 if (last_char
== '>')
8581 fputs_unfiltered (" >", buf
);
8583 fputs_unfiltered (">", buf
);
8587 /* For Java and C++ methods, append formal parameter type
8588 information, if PHYSNAME. */
8590 if (physname
&& die
->tag
== DW_TAG_subprogram
8591 && (cu
->language
== language_cplus
8592 || cu
->language
== language_java
))
8594 struct type
*type
= read_type_die (die
, cu
);
8596 c_type_print_args (type
, buf
, 1, cu
->language
,
8597 &type_print_raw_options
);
8599 if (cu
->language
== language_java
)
8601 /* For java, we must append the return type to method
8603 if (die
->tag
== DW_TAG_subprogram
)
8604 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8605 0, 0, &type_print_raw_options
);
8607 else if (cu
->language
== language_cplus
)
8609 /* Assume that an artificial first parameter is
8610 "this", but do not crash if it is not. RealView
8611 marks unnamed (and thus unused) parameters as
8612 artificial; there is no way to differentiate
8614 if (TYPE_NFIELDS (type
) > 0
8615 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8616 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8617 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8619 fputs_unfiltered (" const", buf
);
8623 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8624 ui_file_delete (buf
);
8626 if (cu
->language
== language_cplus
)
8628 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8629 &objfile
->per_bfd
->storage_obstack
);
8631 /* If we only computed INTERMEDIATE_NAME, or if
8632 INTERMEDIATE_NAME is already canonical, then we need to
8633 copy it to the appropriate obstack. */
8634 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8635 name
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8637 strlen (intermediate_name
));
8639 name
= canonical_name
;
8641 xfree (intermediate_name
);
8648 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8649 If scope qualifiers are appropriate they will be added. The result
8650 will be allocated on the storage_obstack, or NULL if the DIE does
8651 not have a name. NAME may either be from a previous call to
8652 dwarf2_name or NULL.
8654 The output string will be canonicalized (if C++/Java). */
8657 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8659 return dwarf2_compute_name (name
, die
, cu
, 0);
8662 /* Construct a physname for the given DIE in CU. NAME may either be
8663 from a previous call to dwarf2_name or NULL. The result will be
8664 allocated on the objfile_objstack or NULL if the DIE does not have a
8667 The output string will be canonicalized (if C++/Java). */
8670 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8672 struct objfile
*objfile
= cu
->objfile
;
8673 struct attribute
*attr
;
8674 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8675 struct cleanup
*back_to
;
8678 /* In this case dwarf2_compute_name is just a shortcut not building anything
8680 if (!die_needs_namespace (die
, cu
))
8681 return dwarf2_compute_name (name
, die
, cu
, 1);
8683 back_to
= make_cleanup (null_cleanup
, NULL
);
8685 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8687 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8689 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8691 if (attr
&& DW_STRING (attr
))
8695 mangled
= DW_STRING (attr
);
8697 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8698 type. It is easier for GDB users to search for such functions as
8699 `name(params)' than `long name(params)'. In such case the minimal
8700 symbol names do not match the full symbol names but for template
8701 functions there is never a need to look up their definition from their
8702 declaration so the only disadvantage remains the minimal symbol
8703 variant `long name(params)' does not have the proper inferior type.
8706 if (cu
->language
== language_go
)
8708 /* This is a lie, but we already lie to the caller new_symbol_full.
8709 new_symbol_full assumes we return the mangled name.
8710 This just undoes that lie until things are cleaned up. */
8715 demangled
= gdb_demangle (mangled
,
8716 (DMGL_PARAMS
| DMGL_ANSI
8717 | (cu
->language
== language_java
8718 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8723 make_cleanup (xfree
, demangled
);
8733 if (canon
== NULL
|| check_physname
)
8735 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8737 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8739 /* It may not mean a bug in GDB. The compiler could also
8740 compute DW_AT_linkage_name incorrectly. But in such case
8741 GDB would need to be bug-to-bug compatible. */
8743 complaint (&symfile_complaints
,
8744 _("Computed physname <%s> does not match demangled <%s> "
8745 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8746 physname
, canon
, mangled
, die
->offset
.sect_off
,
8747 objfile_name (objfile
));
8749 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8750 is available here - over computed PHYSNAME. It is safer
8751 against both buggy GDB and buggy compilers. */
8765 retval
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8766 retval
, strlen (retval
));
8768 do_cleanups (back_to
);
8772 /* Inspect DIE in CU for a namespace alias. If one exists, record
8773 a new symbol for it.
8775 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8778 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8780 struct attribute
*attr
;
8782 /* If the die does not have a name, this is not a namespace
8784 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8788 struct die_info
*d
= die
;
8789 struct dwarf2_cu
*imported_cu
= cu
;
8791 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8792 keep inspecting DIEs until we hit the underlying import. */
8793 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8794 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8796 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8800 d
= follow_die_ref (d
, attr
, &imported_cu
);
8801 if (d
->tag
!= DW_TAG_imported_declaration
)
8805 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8807 complaint (&symfile_complaints
,
8808 _("DIE at 0x%x has too many recursively imported "
8809 "declarations"), d
->offset
.sect_off
);
8816 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8818 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8819 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8821 /* This declaration is a global namespace alias. Add
8822 a symbol for it whose type is the aliased namespace. */
8823 new_symbol (die
, type
, cu
);
8832 /* Read the import statement specified by the given die and record it. */
8835 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8837 struct objfile
*objfile
= cu
->objfile
;
8838 struct attribute
*import_attr
;
8839 struct die_info
*imported_die
, *child_die
;
8840 struct dwarf2_cu
*imported_cu
;
8841 const char *imported_name
;
8842 const char *imported_name_prefix
;
8843 const char *canonical_name
;
8844 const char *import_alias
;
8845 const char *imported_declaration
= NULL
;
8846 const char *import_prefix
;
8847 VEC (const_char_ptr
) *excludes
= NULL
;
8848 struct cleanup
*cleanups
;
8850 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8851 if (import_attr
== NULL
)
8853 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8854 dwarf_tag_name (die
->tag
));
8859 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8860 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8861 if (imported_name
== NULL
)
8863 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8865 The import in the following code:
8879 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8880 <52> DW_AT_decl_file : 1
8881 <53> DW_AT_decl_line : 6
8882 <54> DW_AT_import : <0x75>
8883 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8885 <5b> DW_AT_decl_file : 1
8886 <5c> DW_AT_decl_line : 2
8887 <5d> DW_AT_type : <0x6e>
8889 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8890 <76> DW_AT_byte_size : 4
8891 <77> DW_AT_encoding : 5 (signed)
8893 imports the wrong die ( 0x75 instead of 0x58 ).
8894 This case will be ignored until the gcc bug is fixed. */
8898 /* Figure out the local name after import. */
8899 import_alias
= dwarf2_name (die
, cu
);
8901 /* Figure out where the statement is being imported to. */
8902 import_prefix
= determine_prefix (die
, cu
);
8904 /* Figure out what the scope of the imported die is and prepend it
8905 to the name of the imported die. */
8906 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8908 if (imported_die
->tag
!= DW_TAG_namespace
8909 && imported_die
->tag
!= DW_TAG_module
)
8911 imported_declaration
= imported_name
;
8912 canonical_name
= imported_name_prefix
;
8914 else if (strlen (imported_name_prefix
) > 0)
8915 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8916 imported_name_prefix
, "::", imported_name
,
8919 canonical_name
= imported_name
;
8921 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8923 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8924 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8925 child_die
= sibling_die (child_die
))
8927 /* DWARF-4: A Fortran use statement with a “rename list” may be
8928 represented by an imported module entry with an import attribute
8929 referring to the module and owned entries corresponding to those
8930 entities that are renamed as part of being imported. */
8932 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8934 complaint (&symfile_complaints
,
8935 _("child DW_TAG_imported_declaration expected "
8936 "- DIE at 0x%x [in module %s]"),
8937 child_die
->offset
.sect_off
, objfile_name (objfile
));
8941 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8942 if (import_attr
== NULL
)
8944 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8945 dwarf_tag_name (child_die
->tag
));
8950 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8952 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8953 if (imported_name
== NULL
)
8955 complaint (&symfile_complaints
,
8956 _("child DW_TAG_imported_declaration has unknown "
8957 "imported name - DIE at 0x%x [in module %s]"),
8958 child_die
->offset
.sect_off
, objfile_name (objfile
));
8962 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
8964 process_die (child_die
, cu
);
8967 cp_add_using_directive (import_prefix
,
8970 imported_declaration
,
8973 &objfile
->objfile_obstack
);
8975 do_cleanups (cleanups
);
8978 /* Cleanup function for handle_DW_AT_stmt_list. */
8981 free_cu_line_header (void *arg
)
8983 struct dwarf2_cu
*cu
= arg
;
8985 free_line_header (cu
->line_header
);
8986 cu
->line_header
= NULL
;
8989 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
8990 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
8991 this, it was first present in GCC release 4.3.0. */
8994 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
8996 if (!cu
->checked_producer
)
8997 check_producer (cu
);
8999 return cu
->producer_is_gcc_lt_4_3
;
9003 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
9004 const char **name
, const char **comp_dir
)
9006 struct attribute
*attr
;
9011 /* Find the filename. Do not use dwarf2_name here, since the filename
9012 is not a source language identifier. */
9013 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9016 *name
= DW_STRING (attr
);
9019 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
9021 *comp_dir
= DW_STRING (attr
);
9022 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9023 && IS_ABSOLUTE_PATH (*name
))
9025 char *d
= ldirname (*name
);
9029 make_cleanup (xfree
, d
);
9031 if (*comp_dir
!= NULL
)
9033 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9034 directory, get rid of it. */
9035 char *cp
= strchr (*comp_dir
, ':');
9037 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9042 *name
= "<unknown>";
9045 /* Handle DW_AT_stmt_list for a compilation unit.
9046 DIE is the DW_TAG_compile_unit die for CU.
9047 COMP_DIR is the compilation directory. LOWPC is passed to
9048 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9051 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9052 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9054 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9055 struct attribute
*attr
;
9056 unsigned int line_offset
;
9057 struct line_header line_header_local
;
9058 hashval_t line_header_local_hash
;
9063 gdb_assert (! cu
->per_cu
->is_debug_types
);
9065 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9069 line_offset
= DW_UNSND (attr
);
9071 /* The line header hash table is only created if needed (it exists to
9072 prevent redundant reading of the line table for partial_units).
9073 If we're given a partial_unit, we'll need it. If we're given a
9074 compile_unit, then use the line header hash table if it's already
9075 created, but don't create one just yet. */
9077 if (dwarf2_per_objfile
->line_header_hash
== NULL
9078 && die
->tag
== DW_TAG_partial_unit
)
9080 dwarf2_per_objfile
->line_header_hash
9081 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9082 line_header_eq_voidp
,
9083 free_line_header_voidp
,
9084 &objfile
->objfile_obstack
,
9085 hashtab_obstack_allocate
,
9086 dummy_obstack_deallocate
);
9089 line_header_local
.offset
.sect_off
= line_offset
;
9090 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9091 line_header_local_hash
= line_header_hash (&line_header_local
);
9092 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9094 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9096 line_header_local_hash
, NO_INSERT
);
9098 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9099 is not present in *SLOT (since if there is something in *SLOT then
9100 it will be for a partial_unit). */
9101 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9103 gdb_assert (*slot
!= NULL
);
9104 cu
->line_header
= *slot
;
9109 /* dwarf_decode_line_header does not yet provide sufficient information.
9110 We always have to call also dwarf_decode_lines for it. */
9111 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9112 if (cu
->line_header
== NULL
)
9115 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9119 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9121 line_header_local_hash
, INSERT
);
9122 gdb_assert (slot
!= NULL
);
9124 if (slot
!= NULL
&& *slot
== NULL
)
9126 /* This newly decoded line number information unit will be owned
9127 by line_header_hash hash table. */
9128 *slot
= cu
->line_header
;
9132 /* We cannot free any current entry in (*slot) as that struct line_header
9133 may be already used by multiple CUs. Create only temporary decoded
9134 line_header for this CU - it may happen at most once for each line
9135 number information unit. And if we're not using line_header_hash
9136 then this is what we want as well. */
9137 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9138 make_cleanup (free_cu_line_header
, cu
);
9140 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9141 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9145 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9148 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9150 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9151 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9152 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9153 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9154 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9155 struct attribute
*attr
;
9156 const char *name
= NULL
;
9157 const char *comp_dir
= NULL
;
9158 struct die_info
*child_die
;
9159 bfd
*abfd
= objfile
->obfd
;
9162 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9164 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9166 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9167 from finish_block. */
9168 if (lowpc
== ((CORE_ADDR
) -1))
9170 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9172 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9174 prepare_one_comp_unit (cu
, die
, cu
->language
);
9176 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9177 standardised yet. As a workaround for the language detection we fall
9178 back to the DW_AT_producer string. */
9179 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9180 cu
->language
= language_opencl
;
9182 /* Similar hack for Go. */
9183 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9184 set_cu_language (DW_LANG_Go
, cu
);
9186 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9188 /* Decode line number information if present. We do this before
9189 processing child DIEs, so that the line header table is available
9190 for DW_AT_decl_file. */
9191 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9193 /* Process all dies in compilation unit. */
9194 if (die
->child
!= NULL
)
9196 child_die
= die
->child
;
9197 while (child_die
&& child_die
->tag
)
9199 process_die (child_die
, cu
);
9200 child_die
= sibling_die (child_die
);
9204 /* Decode macro information, if present. Dwarf 2 macro information
9205 refers to information in the line number info statement program
9206 header, so we can only read it if we've read the header
9208 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9209 if (attr
&& cu
->line_header
)
9211 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9212 complaint (&symfile_complaints
,
9213 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9215 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9219 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9220 if (attr
&& cu
->line_header
)
9222 unsigned int macro_offset
= DW_UNSND (attr
);
9224 dwarf_decode_macros (cu
, macro_offset
, 0);
9228 do_cleanups (back_to
);
9231 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9232 Create the set of symtabs used by this TU, or if this TU is sharing
9233 symtabs with another TU and the symtabs have already been created
9234 then restore those symtabs in the line header.
9235 We don't need the pc/line-number mapping for type units. */
9238 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9240 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9241 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9242 struct type_unit_group
*tu_group
;
9244 struct line_header
*lh
;
9245 struct attribute
*attr
;
9246 unsigned int i
, line_offset
;
9247 struct signatured_type
*sig_type
;
9249 gdb_assert (per_cu
->is_debug_types
);
9250 sig_type
= (struct signatured_type
*) per_cu
;
9252 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9254 /* If we're using .gdb_index (includes -readnow) then
9255 per_cu->type_unit_group may not have been set up yet. */
9256 if (sig_type
->type_unit_group
== NULL
)
9257 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9258 tu_group
= sig_type
->type_unit_group
;
9260 /* If we've already processed this stmt_list there's no real need to
9261 do it again, we could fake it and just recreate the part we need
9262 (file name,index -> symtab mapping). If data shows this optimization
9263 is useful we can do it then. */
9264 first_time
= tu_group
->compunit_symtab
== NULL
;
9266 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9271 line_offset
= DW_UNSND (attr
);
9272 lh
= dwarf_decode_line_header (line_offset
, cu
);
9277 dwarf2_start_symtab (cu
, "", NULL
, 0);
9280 gdb_assert (tu_group
->symtabs
== NULL
);
9281 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9286 cu
->line_header
= lh
;
9287 make_cleanup (free_cu_line_header
, cu
);
9291 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9293 tu_group
->num_symtabs
= lh
->num_file_names
;
9294 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9296 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9298 const char *dir
= NULL
;
9299 struct file_entry
*fe
= &lh
->file_names
[i
];
9302 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9303 dwarf2_start_subfile (fe
->name
, dir
);
9305 if (current_subfile
->symtab
== NULL
)
9307 /* NOTE: start_subfile will recognize when it's been passed
9308 a file it has already seen. So we can't assume there's a
9309 simple mapping from lh->file_names to subfiles, plus
9310 lh->file_names may contain dups. */
9311 current_subfile
->symtab
9312 = allocate_symtab (cust
, current_subfile
->name
);
9315 fe
->symtab
= current_subfile
->symtab
;
9316 tu_group
->symtabs
[i
] = fe
->symtab
;
9321 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9323 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9325 struct file_entry
*fe
= &lh
->file_names
[i
];
9327 fe
->symtab
= tu_group
->symtabs
[i
];
9331 /* The main symtab is allocated last. Type units don't have DW_AT_name
9332 so they don't have a "real" (so to speak) symtab anyway.
9333 There is later code that will assign the main symtab to all symbols
9334 that don't have one. We need to handle the case of a symbol with a
9335 missing symtab (DW_AT_decl_file) anyway. */
9338 /* Process DW_TAG_type_unit.
9339 For TUs we want to skip the first top level sibling if it's not the
9340 actual type being defined by this TU. In this case the first top
9341 level sibling is there to provide context only. */
9344 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9346 struct die_info
*child_die
;
9348 prepare_one_comp_unit (cu
, die
, language_minimal
);
9350 /* Initialize (or reinitialize) the machinery for building symtabs.
9351 We do this before processing child DIEs, so that the line header table
9352 is available for DW_AT_decl_file. */
9353 setup_type_unit_groups (die
, cu
);
9355 if (die
->child
!= NULL
)
9357 child_die
= die
->child
;
9358 while (child_die
&& child_die
->tag
)
9360 process_die (child_die
, cu
);
9361 child_die
= sibling_die (child_die
);
9368 http://gcc.gnu.org/wiki/DebugFission
9369 http://gcc.gnu.org/wiki/DebugFissionDWP
9371 To simplify handling of both DWO files ("object" files with the DWARF info)
9372 and DWP files (a file with the DWOs packaged up into one file), we treat
9373 DWP files as having a collection of virtual DWO files. */
9376 hash_dwo_file (const void *item
)
9378 const struct dwo_file
*dwo_file
= item
;
9381 hash
= htab_hash_string (dwo_file
->dwo_name
);
9382 if (dwo_file
->comp_dir
!= NULL
)
9383 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9388 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9390 const struct dwo_file
*lhs
= item_lhs
;
9391 const struct dwo_file
*rhs
= item_rhs
;
9393 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9395 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9396 return lhs
->comp_dir
== rhs
->comp_dir
;
9397 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9400 /* Allocate a hash table for DWO files. */
9403 allocate_dwo_file_hash_table (void)
9405 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9407 return htab_create_alloc_ex (41,
9411 &objfile
->objfile_obstack
,
9412 hashtab_obstack_allocate
,
9413 dummy_obstack_deallocate
);
9416 /* Lookup DWO file DWO_NAME. */
9419 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9421 struct dwo_file find_entry
;
9424 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9425 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9427 memset (&find_entry
, 0, sizeof (find_entry
));
9428 find_entry
.dwo_name
= dwo_name
;
9429 find_entry
.comp_dir
= comp_dir
;
9430 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9436 hash_dwo_unit (const void *item
)
9438 const struct dwo_unit
*dwo_unit
= item
;
9440 /* This drops the top 32 bits of the id, but is ok for a hash. */
9441 return dwo_unit
->signature
;
9445 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9447 const struct dwo_unit
*lhs
= item_lhs
;
9448 const struct dwo_unit
*rhs
= item_rhs
;
9450 /* The signature is assumed to be unique within the DWO file.
9451 So while object file CU dwo_id's always have the value zero,
9452 that's OK, assuming each object file DWO file has only one CU,
9453 and that's the rule for now. */
9454 return lhs
->signature
== rhs
->signature
;
9457 /* Allocate a hash table for DWO CUs,TUs.
9458 There is one of these tables for each of CUs,TUs for each DWO file. */
9461 allocate_dwo_unit_table (struct objfile
*objfile
)
9463 /* Start out with a pretty small number.
9464 Generally DWO files contain only one CU and maybe some TUs. */
9465 return htab_create_alloc_ex (3,
9469 &objfile
->objfile_obstack
,
9470 hashtab_obstack_allocate
,
9471 dummy_obstack_deallocate
);
9474 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9476 struct create_dwo_cu_data
9478 struct dwo_file
*dwo_file
;
9479 struct dwo_unit dwo_unit
;
9482 /* die_reader_func for create_dwo_cu. */
9485 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9486 const gdb_byte
*info_ptr
,
9487 struct die_info
*comp_unit_die
,
9491 struct dwarf2_cu
*cu
= reader
->cu
;
9492 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9493 sect_offset offset
= cu
->per_cu
->offset
;
9494 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9495 struct create_dwo_cu_data
*data
= datap
;
9496 struct dwo_file
*dwo_file
= data
->dwo_file
;
9497 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9498 struct attribute
*attr
;
9500 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9503 complaint (&symfile_complaints
,
9504 _("Dwarf Error: debug entry at offset 0x%x is missing"
9505 " its dwo_id [in module %s]"),
9506 offset
.sect_off
, dwo_file
->dwo_name
);
9510 dwo_unit
->dwo_file
= dwo_file
;
9511 dwo_unit
->signature
= DW_UNSND (attr
);
9512 dwo_unit
->section
= section
;
9513 dwo_unit
->offset
= offset
;
9514 dwo_unit
->length
= cu
->per_cu
->length
;
9516 if (dwarf2_read_debug
)
9517 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9518 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9521 /* Create the dwo_unit for the lone CU in DWO_FILE.
9522 Note: This function processes DWO files only, not DWP files. */
9524 static struct dwo_unit
*
9525 create_dwo_cu (struct dwo_file
*dwo_file
)
9527 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9528 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9531 const gdb_byte
*info_ptr
, *end_ptr
;
9532 struct create_dwo_cu_data create_dwo_cu_data
;
9533 struct dwo_unit
*dwo_unit
;
9535 dwarf2_read_section (objfile
, section
);
9536 info_ptr
= section
->buffer
;
9538 if (info_ptr
== NULL
)
9541 /* We can't set abfd until now because the section may be empty or
9542 not present, in which case section->asection will be NULL. */
9543 abfd
= get_section_bfd_owner (section
);
9545 if (dwarf2_read_debug
)
9547 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9548 get_section_name (section
),
9549 get_section_file_name (section
));
9552 create_dwo_cu_data
.dwo_file
= dwo_file
;
9555 end_ptr
= info_ptr
+ section
->size
;
9556 while (info_ptr
< end_ptr
)
9558 struct dwarf2_per_cu_data per_cu
;
9560 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9561 sizeof (create_dwo_cu_data
.dwo_unit
));
9562 memset (&per_cu
, 0, sizeof (per_cu
));
9563 per_cu
.objfile
= objfile
;
9564 per_cu
.is_debug_types
= 0;
9565 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9566 per_cu
.section
= section
;
9568 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9569 create_dwo_cu_reader
,
9570 &create_dwo_cu_data
);
9572 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9574 /* If we've already found one, complain. We only support one
9575 because having more than one requires hacking the dwo_name of
9576 each to match, which is highly unlikely to happen. */
9577 if (dwo_unit
!= NULL
)
9579 complaint (&symfile_complaints
,
9580 _("Multiple CUs in DWO file %s [in module %s]"),
9581 dwo_file
->dwo_name
, objfile_name (objfile
));
9585 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9586 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9589 info_ptr
+= per_cu
.length
;
9595 /* DWP file .debug_{cu,tu}_index section format:
9596 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9600 Both index sections have the same format, and serve to map a 64-bit
9601 signature to a set of section numbers. Each section begins with a header,
9602 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9603 indexes, and a pool of 32-bit section numbers. The index sections will be
9604 aligned at 8-byte boundaries in the file.
9606 The index section header consists of:
9608 V, 32 bit version number
9610 N, 32 bit number of compilation units or type units in the index
9611 M, 32 bit number of slots in the hash table
9613 Numbers are recorded using the byte order of the application binary.
9615 The hash table begins at offset 16 in the section, and consists of an array
9616 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9617 order of the application binary). Unused slots in the hash table are 0.
9618 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9620 The parallel table begins immediately after the hash table
9621 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9622 array of 32-bit indexes (using the byte order of the application binary),
9623 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9624 table contains a 32-bit index into the pool of section numbers. For unused
9625 hash table slots, the corresponding entry in the parallel table will be 0.
9627 The pool of section numbers begins immediately following the hash table
9628 (at offset 16 + 12 * M from the beginning of the section). The pool of
9629 section numbers consists of an array of 32-bit words (using the byte order
9630 of the application binary). Each item in the array is indexed starting
9631 from 0. The hash table entry provides the index of the first section
9632 number in the set. Additional section numbers in the set follow, and the
9633 set is terminated by a 0 entry (section number 0 is not used in ELF).
9635 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9636 section must be the first entry in the set, and the .debug_abbrev.dwo must
9637 be the second entry. Other members of the set may follow in any order.
9643 DWP Version 2 combines all the .debug_info, etc. sections into one,
9644 and the entries in the index tables are now offsets into these sections.
9645 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9648 Index Section Contents:
9650 Hash Table of Signatures dwp_hash_table.hash_table
9651 Parallel Table of Indices dwp_hash_table.unit_table
9652 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9653 Table of Section Sizes dwp_hash_table.v2.sizes
9655 The index section header consists of:
9657 V, 32 bit version number
9658 L, 32 bit number of columns in the table of section offsets
9659 N, 32 bit number of compilation units or type units in the index
9660 M, 32 bit number of slots in the hash table
9662 Numbers are recorded using the byte order of the application binary.
9664 The hash table has the same format as version 1.
9665 The parallel table of indices has the same format as version 1,
9666 except that the entries are origin-1 indices into the table of sections
9667 offsets and the table of section sizes.
9669 The table of offsets begins immediately following the parallel table
9670 (at offset 16 + 12 * M from the beginning of the section). The table is
9671 a two-dimensional array of 32-bit words (using the byte order of the
9672 application binary), with L columns and N+1 rows, in row-major order.
9673 Each row in the array is indexed starting from 0. The first row provides
9674 a key to the remaining rows: each column in this row provides an identifier
9675 for a debug section, and the offsets in the same column of subsequent rows
9676 refer to that section. The section identifiers are:
9678 DW_SECT_INFO 1 .debug_info.dwo
9679 DW_SECT_TYPES 2 .debug_types.dwo
9680 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9681 DW_SECT_LINE 4 .debug_line.dwo
9682 DW_SECT_LOC 5 .debug_loc.dwo
9683 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9684 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9685 DW_SECT_MACRO 8 .debug_macro.dwo
9687 The offsets provided by the CU and TU index sections are the base offsets
9688 for the contributions made by each CU or TU to the corresponding section
9689 in the package file. Each CU and TU header contains an abbrev_offset
9690 field, used to find the abbreviations table for that CU or TU within the
9691 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9692 be interpreted as relative to the base offset given in the index section.
9693 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9694 should be interpreted as relative to the base offset for .debug_line.dwo,
9695 and offsets into other debug sections obtained from DWARF attributes should
9696 also be interpreted as relative to the corresponding base offset.
9698 The table of sizes begins immediately following the table of offsets.
9699 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9700 with L columns and N rows, in row-major order. Each row in the array is
9701 indexed starting from 1 (row 0 is shared by the two tables).
9705 Hash table lookup is handled the same in version 1 and 2:
9707 We assume that N and M will not exceed 2^32 - 1.
9708 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9710 Given a 64-bit compilation unit signature or a type signature S, an entry
9711 in the hash table is located as follows:
9713 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9714 the low-order k bits all set to 1.
9716 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9718 3) If the hash table entry at index H matches the signature, use that
9719 entry. If the hash table entry at index H is unused (all zeroes),
9720 terminate the search: the signature is not present in the table.
9722 4) Let H = (H + H') modulo M. Repeat at Step 3.
9724 Because M > N and H' and M are relatively prime, the search is guaranteed
9725 to stop at an unused slot or find the match. */
9727 /* Create a hash table to map DWO IDs to their CU/TU entry in
9728 .debug_{info,types}.dwo in DWP_FILE.
9729 Returns NULL if there isn't one.
9730 Note: This function processes DWP files only, not DWO files. */
9732 static struct dwp_hash_table
*
9733 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9735 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9736 bfd
*dbfd
= dwp_file
->dbfd
;
9737 const gdb_byte
*index_ptr
, *index_end
;
9738 struct dwarf2_section_info
*index
;
9739 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9740 struct dwp_hash_table
*htab
;
9743 index
= &dwp_file
->sections
.tu_index
;
9745 index
= &dwp_file
->sections
.cu_index
;
9747 if (dwarf2_section_empty_p (index
))
9749 dwarf2_read_section (objfile
, index
);
9751 index_ptr
= index
->buffer
;
9752 index_end
= index_ptr
+ index
->size
;
9754 version
= read_4_bytes (dbfd
, index_ptr
);
9757 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9761 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9763 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9766 if (version
!= 1 && version
!= 2)
9768 error (_("Dwarf Error: unsupported DWP file version (%s)"
9770 pulongest (version
), dwp_file
->name
);
9772 if (nr_slots
!= (nr_slots
& -nr_slots
))
9774 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9775 " is not power of 2 [in module %s]"),
9776 pulongest (nr_slots
), dwp_file
->name
);
9779 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9780 htab
->version
= version
;
9781 htab
->nr_columns
= nr_columns
;
9782 htab
->nr_units
= nr_units
;
9783 htab
->nr_slots
= nr_slots
;
9784 htab
->hash_table
= index_ptr
;
9785 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9787 /* Exit early if the table is empty. */
9788 if (nr_slots
== 0 || nr_units
== 0
9789 || (version
== 2 && nr_columns
== 0))
9791 /* All must be zero. */
9792 if (nr_slots
!= 0 || nr_units
!= 0
9793 || (version
== 2 && nr_columns
!= 0))
9795 complaint (&symfile_complaints
,
9796 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9797 " all zero [in modules %s]"),
9805 htab
->section_pool
.v1
.indices
=
9806 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9807 /* It's harder to decide whether the section is too small in v1.
9808 V1 is deprecated anyway so we punt. */
9812 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9813 int *ids
= htab
->section_pool
.v2
.section_ids
;
9814 /* Reverse map for error checking. */
9815 int ids_seen
[DW_SECT_MAX
+ 1];
9820 error (_("Dwarf Error: bad DWP hash table, too few columns"
9821 " in section table [in module %s]"),
9824 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9826 error (_("Dwarf Error: bad DWP hash table, too many columns"
9827 " in section table [in module %s]"),
9830 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9831 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9832 for (i
= 0; i
< nr_columns
; ++i
)
9834 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9836 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9838 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9839 " in section table [in module %s]"),
9840 id
, dwp_file
->name
);
9842 if (ids_seen
[id
] != -1)
9844 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9845 " id %d in section table [in module %s]"),
9846 id
, dwp_file
->name
);
9851 /* Must have exactly one info or types section. */
9852 if (((ids_seen
[DW_SECT_INFO
] != -1)
9853 + (ids_seen
[DW_SECT_TYPES
] != -1))
9856 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9857 " DWO info/types section [in module %s]"),
9860 /* Must have an abbrev section. */
9861 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9863 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9864 " section [in module %s]"),
9867 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9868 htab
->section_pool
.v2
.sizes
=
9869 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9870 * nr_units
* nr_columns
);
9871 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9872 * nr_units
* nr_columns
))
9875 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9884 /* Update SECTIONS with the data from SECTP.
9886 This function is like the other "locate" section routines that are
9887 passed to bfd_map_over_sections, but in this context the sections to
9888 read comes from the DWP V1 hash table, not the full ELF section table.
9890 The result is non-zero for success, or zero if an error was found. */
9893 locate_v1_virtual_dwo_sections (asection
*sectp
,
9894 struct virtual_v1_dwo_sections
*sections
)
9896 const struct dwop_section_names
*names
= &dwop_section_names
;
9898 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9900 /* There can be only one. */
9901 if (sections
->abbrev
.s
.asection
!= NULL
)
9903 sections
->abbrev
.s
.asection
= sectp
;
9904 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9906 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9907 || section_is_p (sectp
->name
, &names
->types_dwo
))
9909 /* There can be only one. */
9910 if (sections
->info_or_types
.s
.asection
!= NULL
)
9912 sections
->info_or_types
.s
.asection
= sectp
;
9913 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9915 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9917 /* There can be only one. */
9918 if (sections
->line
.s
.asection
!= NULL
)
9920 sections
->line
.s
.asection
= sectp
;
9921 sections
->line
.size
= bfd_get_section_size (sectp
);
9923 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9925 /* There can be only one. */
9926 if (sections
->loc
.s
.asection
!= NULL
)
9928 sections
->loc
.s
.asection
= sectp
;
9929 sections
->loc
.size
= bfd_get_section_size (sectp
);
9931 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9933 /* There can be only one. */
9934 if (sections
->macinfo
.s
.asection
!= NULL
)
9936 sections
->macinfo
.s
.asection
= sectp
;
9937 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9939 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9941 /* There can be only one. */
9942 if (sections
->macro
.s
.asection
!= NULL
)
9944 sections
->macro
.s
.asection
= sectp
;
9945 sections
->macro
.size
= bfd_get_section_size (sectp
);
9947 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9949 /* There can be only one. */
9950 if (sections
->str_offsets
.s
.asection
!= NULL
)
9952 sections
->str_offsets
.s
.asection
= sectp
;
9953 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9957 /* No other kind of section is valid. */
9964 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9965 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9966 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9967 This is for DWP version 1 files. */
9969 static struct dwo_unit
*
9970 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
9971 uint32_t unit_index
,
9972 const char *comp_dir
,
9973 ULONGEST signature
, int is_debug_types
)
9975 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9976 const struct dwp_hash_table
*dwp_htab
=
9977 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9978 bfd
*dbfd
= dwp_file
->dbfd
;
9979 const char *kind
= is_debug_types
? "TU" : "CU";
9980 struct dwo_file
*dwo_file
;
9981 struct dwo_unit
*dwo_unit
;
9982 struct virtual_v1_dwo_sections sections
;
9983 void **dwo_file_slot
;
9984 char *virtual_dwo_name
;
9985 struct dwarf2_section_info
*cutu
;
9986 struct cleanup
*cleanups
;
9989 gdb_assert (dwp_file
->version
== 1);
9991 if (dwarf2_read_debug
)
9993 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
9995 pulongest (unit_index
), hex_string (signature
),
9999 /* Fetch the sections of this DWO unit.
10000 Put a limit on the number of sections we look for so that bad data
10001 doesn't cause us to loop forever. */
10003 #define MAX_NR_V1_DWO_SECTIONS \
10004 (1 /* .debug_info or .debug_types */ \
10005 + 1 /* .debug_abbrev */ \
10006 + 1 /* .debug_line */ \
10007 + 1 /* .debug_loc */ \
10008 + 1 /* .debug_str_offsets */ \
10009 + 1 /* .debug_macro or .debug_macinfo */ \
10010 + 1 /* trailing zero */)
10012 memset (§ions
, 0, sizeof (sections
));
10013 cleanups
= make_cleanup (null_cleanup
, 0);
10015 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10018 uint32_t section_nr
=
10019 read_4_bytes (dbfd
,
10020 dwp_htab
->section_pool
.v1
.indices
10021 + (unit_index
+ i
) * sizeof (uint32_t));
10023 if (section_nr
== 0)
10025 if (section_nr
>= dwp_file
->num_sections
)
10027 error (_("Dwarf Error: bad DWP hash table, section number too large"
10028 " [in module %s]"),
10032 sectp
= dwp_file
->elf_sections
[section_nr
];
10033 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10035 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10036 " [in module %s]"),
10042 || dwarf2_section_empty_p (§ions
.info_or_types
)
10043 || dwarf2_section_empty_p (§ions
.abbrev
))
10045 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10046 " [in module %s]"),
10049 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10051 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10052 " [in module %s]"),
10056 /* It's easier for the rest of the code if we fake a struct dwo_file and
10057 have dwo_unit "live" in that. At least for now.
10059 The DWP file can be made up of a random collection of CUs and TUs.
10060 However, for each CU + set of TUs that came from the same original DWO
10061 file, we can combine them back into a virtual DWO file to save space
10062 (fewer struct dwo_file objects to allocate). Remember that for really
10063 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10066 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10067 get_section_id (§ions
.abbrev
),
10068 get_section_id (§ions
.line
),
10069 get_section_id (§ions
.loc
),
10070 get_section_id (§ions
.str_offsets
));
10071 make_cleanup (xfree
, virtual_dwo_name
);
10072 /* Can we use an existing virtual DWO file? */
10073 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10074 /* Create one if necessary. */
10075 if (*dwo_file_slot
== NULL
)
10077 if (dwarf2_read_debug
)
10079 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10082 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10083 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10085 strlen (virtual_dwo_name
));
10086 dwo_file
->comp_dir
= comp_dir
;
10087 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10088 dwo_file
->sections
.line
= sections
.line
;
10089 dwo_file
->sections
.loc
= sections
.loc
;
10090 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10091 dwo_file
->sections
.macro
= sections
.macro
;
10092 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10093 /* The "str" section is global to the entire DWP file. */
10094 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10095 /* The info or types section is assigned below to dwo_unit,
10096 there's no need to record it in dwo_file.
10097 Also, we can't simply record type sections in dwo_file because
10098 we record a pointer into the vector in dwo_unit. As we collect more
10099 types we'll grow the vector and eventually have to reallocate space
10100 for it, invalidating all copies of pointers into the previous
10102 *dwo_file_slot
= dwo_file
;
10106 if (dwarf2_read_debug
)
10108 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10111 dwo_file
= *dwo_file_slot
;
10113 do_cleanups (cleanups
);
10115 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10116 dwo_unit
->dwo_file
= dwo_file
;
10117 dwo_unit
->signature
= signature
;
10118 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10119 sizeof (struct dwarf2_section_info
));
10120 *dwo_unit
->section
= sections
.info_or_types
;
10121 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10126 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10127 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10128 piece within that section used by a TU/CU, return a virtual section
10129 of just that piece. */
10131 static struct dwarf2_section_info
10132 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10133 bfd_size_type offset
, bfd_size_type size
)
10135 struct dwarf2_section_info result
;
10138 gdb_assert (section
!= NULL
);
10139 gdb_assert (!section
->is_virtual
);
10141 memset (&result
, 0, sizeof (result
));
10142 result
.s
.containing_section
= section
;
10143 result
.is_virtual
= 1;
10148 sectp
= get_section_bfd_section (section
);
10150 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10151 bounds of the real section. This is a pretty-rare event, so just
10152 flag an error (easier) instead of a warning and trying to cope. */
10154 || offset
+ size
> bfd_get_section_size (sectp
))
10156 bfd
*abfd
= sectp
->owner
;
10158 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10159 " in section %s [in module %s]"),
10160 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10161 objfile_name (dwarf2_per_objfile
->objfile
));
10164 result
.virtual_offset
= offset
;
10165 result
.size
= size
;
10169 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10170 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10171 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10172 This is for DWP version 2 files. */
10174 static struct dwo_unit
*
10175 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10176 uint32_t unit_index
,
10177 const char *comp_dir
,
10178 ULONGEST signature
, int is_debug_types
)
10180 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10181 const struct dwp_hash_table
*dwp_htab
=
10182 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10183 bfd
*dbfd
= dwp_file
->dbfd
;
10184 const char *kind
= is_debug_types
? "TU" : "CU";
10185 struct dwo_file
*dwo_file
;
10186 struct dwo_unit
*dwo_unit
;
10187 struct virtual_v2_dwo_sections sections
;
10188 void **dwo_file_slot
;
10189 char *virtual_dwo_name
;
10190 struct dwarf2_section_info
*cutu
;
10191 struct cleanup
*cleanups
;
10194 gdb_assert (dwp_file
->version
== 2);
10196 if (dwarf2_read_debug
)
10198 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10200 pulongest (unit_index
), hex_string (signature
),
10204 /* Fetch the section offsets of this DWO unit. */
10206 memset (§ions
, 0, sizeof (sections
));
10207 cleanups
= make_cleanup (null_cleanup
, 0);
10209 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10211 uint32_t offset
= read_4_bytes (dbfd
,
10212 dwp_htab
->section_pool
.v2
.offsets
10213 + (((unit_index
- 1) * dwp_htab
->nr_columns
10215 * sizeof (uint32_t)));
10216 uint32_t size
= read_4_bytes (dbfd
,
10217 dwp_htab
->section_pool
.v2
.sizes
10218 + (((unit_index
- 1) * dwp_htab
->nr_columns
10220 * sizeof (uint32_t)));
10222 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10225 case DW_SECT_TYPES
:
10226 sections
.info_or_types_offset
= offset
;
10227 sections
.info_or_types_size
= size
;
10229 case DW_SECT_ABBREV
:
10230 sections
.abbrev_offset
= offset
;
10231 sections
.abbrev_size
= size
;
10234 sections
.line_offset
= offset
;
10235 sections
.line_size
= size
;
10238 sections
.loc_offset
= offset
;
10239 sections
.loc_size
= size
;
10241 case DW_SECT_STR_OFFSETS
:
10242 sections
.str_offsets_offset
= offset
;
10243 sections
.str_offsets_size
= size
;
10245 case DW_SECT_MACINFO
:
10246 sections
.macinfo_offset
= offset
;
10247 sections
.macinfo_size
= size
;
10249 case DW_SECT_MACRO
:
10250 sections
.macro_offset
= offset
;
10251 sections
.macro_size
= size
;
10256 /* It's easier for the rest of the code if we fake a struct dwo_file and
10257 have dwo_unit "live" in that. At least for now.
10259 The DWP file can be made up of a random collection of CUs and TUs.
10260 However, for each CU + set of TUs that came from the same original DWO
10261 file, we can combine them back into a virtual DWO file to save space
10262 (fewer struct dwo_file objects to allocate). Remember that for really
10263 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10266 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10267 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10268 (long) (sections
.line_size
? sections
.line_offset
: 0),
10269 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10270 (long) (sections
.str_offsets_size
10271 ? sections
.str_offsets_offset
: 0));
10272 make_cleanup (xfree
, virtual_dwo_name
);
10273 /* Can we use an existing virtual DWO file? */
10274 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10275 /* Create one if necessary. */
10276 if (*dwo_file_slot
== NULL
)
10278 if (dwarf2_read_debug
)
10280 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10283 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10284 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10286 strlen (virtual_dwo_name
));
10287 dwo_file
->comp_dir
= comp_dir
;
10288 dwo_file
->sections
.abbrev
=
10289 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10290 sections
.abbrev_offset
, sections
.abbrev_size
);
10291 dwo_file
->sections
.line
=
10292 create_dwp_v2_section (&dwp_file
->sections
.line
,
10293 sections
.line_offset
, sections
.line_size
);
10294 dwo_file
->sections
.loc
=
10295 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10296 sections
.loc_offset
, sections
.loc_size
);
10297 dwo_file
->sections
.macinfo
=
10298 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10299 sections
.macinfo_offset
, sections
.macinfo_size
);
10300 dwo_file
->sections
.macro
=
10301 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10302 sections
.macro_offset
, sections
.macro_size
);
10303 dwo_file
->sections
.str_offsets
=
10304 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10305 sections
.str_offsets_offset
,
10306 sections
.str_offsets_size
);
10307 /* The "str" section is global to the entire DWP file. */
10308 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10309 /* The info or types section is assigned below to dwo_unit,
10310 there's no need to record it in dwo_file.
10311 Also, we can't simply record type sections in dwo_file because
10312 we record a pointer into the vector in dwo_unit. As we collect more
10313 types we'll grow the vector and eventually have to reallocate space
10314 for it, invalidating all copies of pointers into the previous
10316 *dwo_file_slot
= dwo_file
;
10320 if (dwarf2_read_debug
)
10322 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10325 dwo_file
= *dwo_file_slot
;
10327 do_cleanups (cleanups
);
10329 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10330 dwo_unit
->dwo_file
= dwo_file
;
10331 dwo_unit
->signature
= signature
;
10332 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10333 sizeof (struct dwarf2_section_info
));
10334 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10335 ? &dwp_file
->sections
.types
10336 : &dwp_file
->sections
.info
,
10337 sections
.info_or_types_offset
,
10338 sections
.info_or_types_size
);
10339 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10344 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10345 Returns NULL if the signature isn't found. */
10347 static struct dwo_unit
*
10348 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10349 ULONGEST signature
, int is_debug_types
)
10351 const struct dwp_hash_table
*dwp_htab
=
10352 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10353 bfd
*dbfd
= dwp_file
->dbfd
;
10354 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10355 uint32_t hash
= signature
& mask
;
10356 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10359 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10361 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10362 find_dwo_cu
.signature
= signature
;
10363 slot
= htab_find_slot (is_debug_types
10364 ? dwp_file
->loaded_tus
10365 : dwp_file
->loaded_cus
,
10366 &find_dwo_cu
, INSERT
);
10371 /* Use a for loop so that we don't loop forever on bad debug info. */
10372 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10374 ULONGEST signature_in_table
;
10376 signature_in_table
=
10377 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10378 if (signature_in_table
== signature
)
10380 uint32_t unit_index
=
10381 read_4_bytes (dbfd
,
10382 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10384 if (dwp_file
->version
== 1)
10386 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10387 comp_dir
, signature
,
10392 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10393 comp_dir
, signature
,
10398 if (signature_in_table
== 0)
10400 hash
= (hash
+ hash2
) & mask
;
10403 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10404 " [in module %s]"),
10408 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10409 Open the file specified by FILE_NAME and hand it off to BFD for
10410 preliminary analysis. Return a newly initialized bfd *, which
10411 includes a canonicalized copy of FILE_NAME.
10412 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10413 SEARCH_CWD is true if the current directory is to be searched.
10414 It will be searched before debug-file-directory.
10415 If successful, the file is added to the bfd include table of the
10416 objfile's bfd (see gdb_bfd_record_inclusion).
10417 If unable to find/open the file, return NULL.
10418 NOTE: This function is derived from symfile_bfd_open. */
10421 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10425 char *absolute_name
;
10426 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10427 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10428 to debug_file_directory. */
10430 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10434 if (*debug_file_directory
!= '\0')
10435 search_path
= concat (".", dirname_separator_string
,
10436 debug_file_directory
, NULL
);
10438 search_path
= xstrdup (".");
10441 search_path
= xstrdup (debug_file_directory
);
10443 flags
= OPF_RETURN_REALPATH
;
10445 flags
|= OPF_SEARCH_IN_PATH
;
10446 desc
= openp (search_path
, flags
, file_name
,
10447 O_RDONLY
| O_BINARY
, &absolute_name
);
10448 xfree (search_path
);
10452 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10453 xfree (absolute_name
);
10454 if (sym_bfd
== NULL
)
10456 bfd_set_cacheable (sym_bfd
, 1);
10458 if (!bfd_check_format (sym_bfd
, bfd_object
))
10460 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10464 /* Success. Record the bfd as having been included by the objfile's bfd.
10465 This is important because things like demangled_names_hash lives in the
10466 objfile's per_bfd space and may have references to things like symbol
10467 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10468 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10473 /* Try to open DWO file FILE_NAME.
10474 COMP_DIR is the DW_AT_comp_dir attribute.
10475 The result is the bfd handle of the file.
10476 If there is a problem finding or opening the file, return NULL.
10477 Upon success, the canonicalized path of the file is stored in the bfd,
10478 same as symfile_bfd_open. */
10481 open_dwo_file (const char *file_name
, const char *comp_dir
)
10485 if (IS_ABSOLUTE_PATH (file_name
))
10486 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10488 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10490 if (comp_dir
!= NULL
)
10492 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10494 /* NOTE: If comp_dir is a relative path, this will also try the
10495 search path, which seems useful. */
10496 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10497 xfree (path_to_try
);
10502 /* That didn't work, try debug-file-directory, which, despite its name,
10503 is a list of paths. */
10505 if (*debug_file_directory
== '\0')
10508 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10511 /* This function is mapped across the sections and remembers the offset and
10512 size of each of the DWO debugging sections we are interested in. */
10515 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10517 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10518 const struct dwop_section_names
*names
= &dwop_section_names
;
10520 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10522 dwo_sections
->abbrev
.s
.asection
= sectp
;
10523 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10525 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10527 dwo_sections
->info
.s
.asection
= sectp
;
10528 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10530 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10532 dwo_sections
->line
.s
.asection
= sectp
;
10533 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10535 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10537 dwo_sections
->loc
.s
.asection
= sectp
;
10538 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10540 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10542 dwo_sections
->macinfo
.s
.asection
= sectp
;
10543 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10545 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10547 dwo_sections
->macro
.s
.asection
= sectp
;
10548 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10550 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10552 dwo_sections
->str
.s
.asection
= sectp
;
10553 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10555 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10557 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10558 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10560 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10562 struct dwarf2_section_info type_section
;
10564 memset (&type_section
, 0, sizeof (type_section
));
10565 type_section
.s
.asection
= sectp
;
10566 type_section
.size
= bfd_get_section_size (sectp
);
10567 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10572 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10573 by PER_CU. This is for the non-DWP case.
10574 The result is NULL if DWO_NAME can't be found. */
10576 static struct dwo_file
*
10577 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10578 const char *dwo_name
, const char *comp_dir
)
10580 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10581 struct dwo_file
*dwo_file
;
10583 struct cleanup
*cleanups
;
10585 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10588 if (dwarf2_read_debug
)
10589 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10592 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10593 dwo_file
->dwo_name
= dwo_name
;
10594 dwo_file
->comp_dir
= comp_dir
;
10595 dwo_file
->dbfd
= dbfd
;
10597 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10599 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10601 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10603 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10604 dwo_file
->sections
.types
);
10606 discard_cleanups (cleanups
);
10608 if (dwarf2_read_debug
)
10609 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10614 /* This function is mapped across the sections and remembers the offset and
10615 size of each of the DWP debugging sections common to version 1 and 2 that
10616 we are interested in. */
10619 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10620 void *dwp_file_ptr
)
10622 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10623 const struct dwop_section_names
*names
= &dwop_section_names
;
10624 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10626 /* Record the ELF section number for later lookup: this is what the
10627 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10628 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10629 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10631 /* Look for specific sections that we need. */
10632 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10634 dwp_file
->sections
.str
.s
.asection
= sectp
;
10635 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10637 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10639 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10640 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10642 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10644 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10645 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10649 /* This function is mapped across the sections and remembers the offset and
10650 size of each of the DWP version 2 debugging sections that we are interested
10651 in. This is split into a separate function because we don't know if we
10652 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10655 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10657 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10658 const struct dwop_section_names
*names
= &dwop_section_names
;
10659 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10661 /* Record the ELF section number for later lookup: this is what the
10662 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10663 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10664 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10666 /* Look for specific sections that we need. */
10667 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10669 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10670 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10672 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10674 dwp_file
->sections
.info
.s
.asection
= sectp
;
10675 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10677 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10679 dwp_file
->sections
.line
.s
.asection
= sectp
;
10680 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10682 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10684 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10685 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10687 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10689 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10690 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10692 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10694 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10695 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10697 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10699 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10700 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10702 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10704 dwp_file
->sections
.types
.s
.asection
= sectp
;
10705 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10709 /* Hash function for dwp_file loaded CUs/TUs. */
10712 hash_dwp_loaded_cutus (const void *item
)
10714 const struct dwo_unit
*dwo_unit
= item
;
10716 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10717 return dwo_unit
->signature
;
10720 /* Equality function for dwp_file loaded CUs/TUs. */
10723 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10725 const struct dwo_unit
*dua
= a
;
10726 const struct dwo_unit
*dub
= b
;
10728 return dua
->signature
== dub
->signature
;
10731 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10734 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10736 return htab_create_alloc_ex (3,
10737 hash_dwp_loaded_cutus
,
10738 eq_dwp_loaded_cutus
,
10740 &objfile
->objfile_obstack
,
10741 hashtab_obstack_allocate
,
10742 dummy_obstack_deallocate
);
10745 /* Try to open DWP file FILE_NAME.
10746 The result is the bfd handle of the file.
10747 If there is a problem finding or opening the file, return NULL.
10748 Upon success, the canonicalized path of the file is stored in the bfd,
10749 same as symfile_bfd_open. */
10752 open_dwp_file (const char *file_name
)
10756 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10760 /* Work around upstream bug 15652.
10761 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10762 [Whether that's a "bug" is debatable, but it is getting in our way.]
10763 We have no real idea where the dwp file is, because gdb's realpath-ing
10764 of the executable's path may have discarded the needed info.
10765 [IWBN if the dwp file name was recorded in the executable, akin to
10766 .gnu_debuglink, but that doesn't exist yet.]
10767 Strip the directory from FILE_NAME and search again. */
10768 if (*debug_file_directory
!= '\0')
10770 /* Don't implicitly search the current directory here.
10771 If the user wants to search "." to handle this case,
10772 it must be added to debug-file-directory. */
10773 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10780 /* Initialize the use of the DWP file for the current objfile.
10781 By convention the name of the DWP file is ${objfile}.dwp.
10782 The result is NULL if it can't be found. */
10784 static struct dwp_file
*
10785 open_and_init_dwp_file (void)
10787 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10788 struct dwp_file
*dwp_file
;
10791 struct cleanup
*cleanups
;
10793 /* Try to find first .dwp for the binary file before any symbolic links
10795 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10796 cleanups
= make_cleanup (xfree
, dwp_name
);
10798 dbfd
= open_dwp_file (dwp_name
);
10800 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10802 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10803 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10804 make_cleanup (xfree
, dwp_name
);
10805 dbfd
= open_dwp_file (dwp_name
);
10810 if (dwarf2_read_debug
)
10811 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10812 do_cleanups (cleanups
);
10815 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10816 dwp_file
->name
= bfd_get_filename (dbfd
);
10817 dwp_file
->dbfd
= dbfd
;
10818 do_cleanups (cleanups
);
10820 /* +1: section 0 is unused */
10821 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10822 dwp_file
->elf_sections
=
10823 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10824 dwp_file
->num_sections
, asection
*);
10826 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10828 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10830 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10832 /* The DWP file version is stored in the hash table. Oh well. */
10833 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10835 /* Technically speaking, we should try to limp along, but this is
10836 pretty bizarre. We use pulongest here because that's the established
10837 portability solution (e.g, we cannot use %u for uint32_t). */
10838 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10839 " TU version %s [in DWP file %s]"),
10840 pulongest (dwp_file
->cus
->version
),
10841 pulongest (dwp_file
->tus
->version
), dwp_name
);
10843 dwp_file
->version
= dwp_file
->cus
->version
;
10845 if (dwp_file
->version
== 2)
10846 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10848 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10849 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10851 if (dwarf2_read_debug
)
10853 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10854 fprintf_unfiltered (gdb_stdlog
,
10855 " %s CUs, %s TUs\n",
10856 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10857 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10863 /* Wrapper around open_and_init_dwp_file, only open it once. */
10865 static struct dwp_file
*
10866 get_dwp_file (void)
10868 if (! dwarf2_per_objfile
->dwp_checked
)
10870 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10871 dwarf2_per_objfile
->dwp_checked
= 1;
10873 return dwarf2_per_objfile
->dwp_file
;
10876 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10877 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10878 or in the DWP file for the objfile, referenced by THIS_UNIT.
10879 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10880 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10882 This is called, for example, when wanting to read a variable with a
10883 complex location. Therefore we don't want to do file i/o for every call.
10884 Therefore we don't want to look for a DWO file on every call.
10885 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10886 then we check if we've already seen DWO_NAME, and only THEN do we check
10889 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10890 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10892 static struct dwo_unit
*
10893 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10894 const char *dwo_name
, const char *comp_dir
,
10895 ULONGEST signature
, int is_debug_types
)
10897 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10898 const char *kind
= is_debug_types
? "TU" : "CU";
10899 void **dwo_file_slot
;
10900 struct dwo_file
*dwo_file
;
10901 struct dwp_file
*dwp_file
;
10903 /* First see if there's a DWP file.
10904 If we have a DWP file but didn't find the DWO inside it, don't
10905 look for the original DWO file. It makes gdb behave differently
10906 depending on whether one is debugging in the build tree. */
10908 dwp_file
= get_dwp_file ();
10909 if (dwp_file
!= NULL
)
10911 const struct dwp_hash_table
*dwp_htab
=
10912 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10914 if (dwp_htab
!= NULL
)
10916 struct dwo_unit
*dwo_cutu
=
10917 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10918 signature
, is_debug_types
);
10920 if (dwo_cutu
!= NULL
)
10922 if (dwarf2_read_debug
)
10924 fprintf_unfiltered (gdb_stdlog
,
10925 "Virtual DWO %s %s found: @%s\n",
10926 kind
, hex_string (signature
),
10927 host_address_to_string (dwo_cutu
));
10935 /* No DWP file, look for the DWO file. */
10937 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10938 if (*dwo_file_slot
== NULL
)
10940 /* Read in the file and build a table of the CUs/TUs it contains. */
10941 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10943 /* NOTE: This will be NULL if unable to open the file. */
10944 dwo_file
= *dwo_file_slot
;
10946 if (dwo_file
!= NULL
)
10948 struct dwo_unit
*dwo_cutu
= NULL
;
10950 if (is_debug_types
&& dwo_file
->tus
)
10952 struct dwo_unit find_dwo_cutu
;
10954 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10955 find_dwo_cutu
.signature
= signature
;
10956 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10958 else if (!is_debug_types
&& dwo_file
->cu
)
10960 if (signature
== dwo_file
->cu
->signature
)
10961 dwo_cutu
= dwo_file
->cu
;
10964 if (dwo_cutu
!= NULL
)
10966 if (dwarf2_read_debug
)
10968 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
10969 kind
, dwo_name
, hex_string (signature
),
10970 host_address_to_string (dwo_cutu
));
10977 /* We didn't find it. This could mean a dwo_id mismatch, or
10978 someone deleted the DWO/DWP file, or the search path isn't set up
10979 correctly to find the file. */
10981 if (dwarf2_read_debug
)
10983 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
10984 kind
, dwo_name
, hex_string (signature
));
10987 /* This is a warning and not a complaint because it can be caused by
10988 pilot error (e.g., user accidentally deleting the DWO). */
10990 /* Print the name of the DWP file if we looked there, helps the user
10991 better diagnose the problem. */
10992 char *dwp_text
= NULL
;
10993 struct cleanup
*cleanups
;
10995 if (dwp_file
!= NULL
)
10996 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
10997 cleanups
= make_cleanup (xfree
, dwp_text
);
10999 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11000 " [in module %s]"),
11001 kind
, dwo_name
, hex_string (signature
),
11002 dwp_text
!= NULL
? dwp_text
: "",
11003 this_unit
->is_debug_types
? "TU" : "CU",
11004 this_unit
->offset
.sect_off
, objfile_name (objfile
));
11006 do_cleanups (cleanups
);
11011 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11012 See lookup_dwo_cutu_unit for details. */
11014 static struct dwo_unit
*
11015 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11016 const char *dwo_name
, const char *comp_dir
,
11017 ULONGEST signature
)
11019 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11022 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11023 See lookup_dwo_cutu_unit for details. */
11025 static struct dwo_unit
*
11026 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11027 const char *dwo_name
, const char *comp_dir
)
11029 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11032 /* Traversal function for queue_and_load_all_dwo_tus. */
11035 queue_and_load_dwo_tu (void **slot
, void *info
)
11037 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11038 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11039 ULONGEST signature
= dwo_unit
->signature
;
11040 struct signatured_type
*sig_type
=
11041 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11043 if (sig_type
!= NULL
)
11045 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11047 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11048 a real dependency of PER_CU on SIG_TYPE. That is detected later
11049 while processing PER_CU. */
11050 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11051 load_full_type_unit (sig_cu
);
11052 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11058 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11059 The DWO may have the only definition of the type, though it may not be
11060 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11061 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11064 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11066 struct dwo_unit
*dwo_unit
;
11067 struct dwo_file
*dwo_file
;
11069 gdb_assert (!per_cu
->is_debug_types
);
11070 gdb_assert (get_dwp_file () == NULL
);
11071 gdb_assert (per_cu
->cu
!= NULL
);
11073 dwo_unit
= per_cu
->cu
->dwo_unit
;
11074 gdb_assert (dwo_unit
!= NULL
);
11076 dwo_file
= dwo_unit
->dwo_file
;
11077 if (dwo_file
->tus
!= NULL
)
11078 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11081 /* Free all resources associated with DWO_FILE.
11082 Close the DWO file and munmap the sections.
11083 All memory should be on the objfile obstack. */
11086 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11089 struct dwarf2_section_info
*section
;
11091 /* Note: dbfd is NULL for virtual DWO files. */
11092 gdb_bfd_unref (dwo_file
->dbfd
);
11094 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11097 /* Wrapper for free_dwo_file for use in cleanups. */
11100 free_dwo_file_cleanup (void *arg
)
11102 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11103 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11105 free_dwo_file (dwo_file
, objfile
);
11108 /* Traversal function for free_dwo_files. */
11111 free_dwo_file_from_slot (void **slot
, void *info
)
11113 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11114 struct objfile
*objfile
= (struct objfile
*) info
;
11116 free_dwo_file (dwo_file
, objfile
);
11121 /* Free all resources associated with DWO_FILES. */
11124 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11126 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11129 /* Read in various DIEs. */
11131 /* qsort helper for inherit_abstract_dies. */
11134 unsigned_int_compar (const void *ap
, const void *bp
)
11136 unsigned int a
= *(unsigned int *) ap
;
11137 unsigned int b
= *(unsigned int *) bp
;
11139 return (a
> b
) - (b
> a
);
11142 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11143 Inherit only the children of the DW_AT_abstract_origin DIE not being
11144 already referenced by DW_AT_abstract_origin from the children of the
11148 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11150 struct die_info
*child_die
;
11151 unsigned die_children_count
;
11152 /* CU offsets which were referenced by children of the current DIE. */
11153 sect_offset
*offsets
;
11154 sect_offset
*offsets_end
, *offsetp
;
11155 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11156 struct die_info
*origin_die
;
11157 /* Iterator of the ORIGIN_DIE children. */
11158 struct die_info
*origin_child_die
;
11159 struct cleanup
*cleanups
;
11160 struct attribute
*attr
;
11161 struct dwarf2_cu
*origin_cu
;
11162 struct pending
**origin_previous_list_in_scope
;
11164 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11168 /* Note that following die references may follow to a die in a
11172 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11174 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11176 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11177 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11179 if (die
->tag
!= origin_die
->tag
11180 && !(die
->tag
== DW_TAG_inlined_subroutine
11181 && origin_die
->tag
== DW_TAG_subprogram
))
11182 complaint (&symfile_complaints
,
11183 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11184 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11186 child_die
= die
->child
;
11187 die_children_count
= 0;
11188 while (child_die
&& child_die
->tag
)
11190 child_die
= sibling_die (child_die
);
11191 die_children_count
++;
11193 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
11194 cleanups
= make_cleanup (xfree
, offsets
);
11196 offsets_end
= offsets
;
11197 child_die
= die
->child
;
11198 while (child_die
&& child_die
->tag
)
11200 /* For each CHILD_DIE, find the corresponding child of
11201 ORIGIN_DIE. If there is more than one layer of
11202 DW_AT_abstract_origin, follow them all; there shouldn't be,
11203 but GCC versions at least through 4.4 generate this (GCC PR
11205 struct die_info
*child_origin_die
= child_die
;
11206 struct dwarf2_cu
*child_origin_cu
= cu
;
11210 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11214 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11218 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11219 counterpart may exist. */
11220 if (child_origin_die
!= child_die
)
11222 if (child_die
->tag
!= child_origin_die
->tag
11223 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11224 && child_origin_die
->tag
== DW_TAG_subprogram
))
11225 complaint (&symfile_complaints
,
11226 _("Child DIE 0x%x and its abstract origin 0x%x have "
11227 "different tags"), child_die
->offset
.sect_off
,
11228 child_origin_die
->offset
.sect_off
);
11229 if (child_origin_die
->parent
!= origin_die
)
11230 complaint (&symfile_complaints
,
11231 _("Child DIE 0x%x and its abstract origin 0x%x have "
11232 "different parents"), child_die
->offset
.sect_off
,
11233 child_origin_die
->offset
.sect_off
);
11235 *offsets_end
++ = child_origin_die
->offset
;
11237 child_die
= sibling_die (child_die
);
11239 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11240 unsigned_int_compar
);
11241 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11242 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11243 complaint (&symfile_complaints
,
11244 _("Multiple children of DIE 0x%x refer "
11245 "to DIE 0x%x as their abstract origin"),
11246 die
->offset
.sect_off
, offsetp
->sect_off
);
11249 origin_child_die
= origin_die
->child
;
11250 while (origin_child_die
&& origin_child_die
->tag
)
11252 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11253 while (offsetp
< offsets_end
11254 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11256 if (offsetp
>= offsets_end
11257 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11259 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11260 Check whether we're already processing ORIGIN_CHILD_DIE.
11261 This can happen with mutually referenced abstract_origins.
11263 if (!origin_child_die
->in_process
)
11264 process_die (origin_child_die
, origin_cu
);
11266 origin_child_die
= sibling_die (origin_child_die
);
11268 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11270 do_cleanups (cleanups
);
11274 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11276 struct objfile
*objfile
= cu
->objfile
;
11277 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11278 struct context_stack
*new;
11281 struct die_info
*child_die
;
11282 struct attribute
*attr
, *call_line
, *call_file
;
11284 CORE_ADDR baseaddr
;
11285 struct block
*block
;
11286 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11287 VEC (symbolp
) *template_args
= NULL
;
11288 struct template_symbol
*templ_func
= NULL
;
11292 /* If we do not have call site information, we can't show the
11293 caller of this inlined function. That's too confusing, so
11294 only use the scope for local variables. */
11295 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11296 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11297 if (call_line
== NULL
|| call_file
== NULL
)
11299 read_lexical_block_scope (die
, cu
);
11304 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11306 name
= dwarf2_name (die
, cu
);
11308 /* Ignore functions with missing or empty names. These are actually
11309 illegal according to the DWARF standard. */
11312 complaint (&symfile_complaints
,
11313 _("missing name for subprogram DIE at %d"),
11314 die
->offset
.sect_off
);
11318 /* Ignore functions with missing or invalid low and high pc attributes. */
11319 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11321 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11322 if (!attr
|| !DW_UNSND (attr
))
11323 complaint (&symfile_complaints
,
11324 _("cannot get low and high bounds "
11325 "for subprogram DIE at %d"),
11326 die
->offset
.sect_off
);
11330 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11331 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11333 /* If we have any template arguments, then we must allocate a
11334 different sort of symbol. */
11335 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11337 if (child_die
->tag
== DW_TAG_template_type_param
11338 || child_die
->tag
== DW_TAG_template_value_param
)
11340 templ_func
= allocate_template_symbol (objfile
);
11341 templ_func
->base
.is_cplus_template_function
= 1;
11346 new = push_context (0, lowpc
);
11347 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11348 (struct symbol
*) templ_func
);
11350 /* If there is a location expression for DW_AT_frame_base, record
11352 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11354 dwarf2_symbol_mark_computed (attr
, new->name
, cu
, 1);
11356 cu
->list_in_scope
= &local_symbols
;
11358 if (die
->child
!= NULL
)
11360 child_die
= die
->child
;
11361 while (child_die
&& child_die
->tag
)
11363 if (child_die
->tag
== DW_TAG_template_type_param
11364 || child_die
->tag
== DW_TAG_template_value_param
)
11366 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11369 VEC_safe_push (symbolp
, template_args
, arg
);
11372 process_die (child_die
, cu
);
11373 child_die
= sibling_die (child_die
);
11377 inherit_abstract_dies (die
, cu
);
11379 /* If we have a DW_AT_specification, we might need to import using
11380 directives from the context of the specification DIE. See the
11381 comment in determine_prefix. */
11382 if (cu
->language
== language_cplus
11383 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11385 struct dwarf2_cu
*spec_cu
= cu
;
11386 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11390 child_die
= spec_die
->child
;
11391 while (child_die
&& child_die
->tag
)
11393 if (child_die
->tag
== DW_TAG_imported_module
)
11394 process_die (child_die
, spec_cu
);
11395 child_die
= sibling_die (child_die
);
11398 /* In some cases, GCC generates specification DIEs that
11399 themselves contain DW_AT_specification attributes. */
11400 spec_die
= die_specification (spec_die
, &spec_cu
);
11404 new = pop_context ();
11405 /* Make a block for the local symbols within. */
11406 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
11409 /* For C++, set the block's scope. */
11410 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
11411 && cu
->processing_has_namespace_info
)
11412 block_set_scope (block
, determine_prefix (die
, cu
),
11413 &objfile
->objfile_obstack
);
11415 /* If we have address ranges, record them. */
11416 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11418 gdbarch_make_symbol_special (gdbarch
, new->name
, objfile
);
11420 /* Attach template arguments to function. */
11421 if (! VEC_empty (symbolp
, template_args
))
11423 gdb_assert (templ_func
!= NULL
);
11425 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11426 templ_func
->template_arguments
11427 = obstack_alloc (&objfile
->objfile_obstack
,
11428 (templ_func
->n_template_arguments
11429 * sizeof (struct symbol
*)));
11430 memcpy (templ_func
->template_arguments
,
11431 VEC_address (symbolp
, template_args
),
11432 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11433 VEC_free (symbolp
, template_args
);
11436 /* In C++, we can have functions nested inside functions (e.g., when
11437 a function declares a class that has methods). This means that
11438 when we finish processing a function scope, we may need to go
11439 back to building a containing block's symbol lists. */
11440 local_symbols
= new->locals
;
11441 using_directives
= new->using_directives
;
11443 /* If we've finished processing a top-level function, subsequent
11444 symbols go in the file symbol list. */
11445 if (outermost_context_p ())
11446 cu
->list_in_scope
= &file_symbols
;
11449 /* Process all the DIES contained within a lexical block scope. Start
11450 a new scope, process the dies, and then close the scope. */
11453 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11455 struct objfile
*objfile
= cu
->objfile
;
11456 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11457 struct context_stack
*new;
11458 CORE_ADDR lowpc
, highpc
;
11459 struct die_info
*child_die
;
11460 CORE_ADDR baseaddr
;
11462 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11464 /* Ignore blocks with missing or invalid low and high pc attributes. */
11465 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11466 as multiple lexical blocks? Handling children in a sane way would
11467 be nasty. Might be easier to properly extend generic blocks to
11468 describe ranges. */
11469 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11471 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11472 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11474 push_context (0, lowpc
);
11475 if (die
->child
!= NULL
)
11477 child_die
= die
->child
;
11478 while (child_die
&& child_die
->tag
)
11480 process_die (child_die
, cu
);
11481 child_die
= sibling_die (child_die
);
11484 new = pop_context ();
11486 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
11488 struct block
*block
11489 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
11492 /* Note that recording ranges after traversing children, as we
11493 do here, means that recording a parent's ranges entails
11494 walking across all its children's ranges as they appear in
11495 the address map, which is quadratic behavior.
11497 It would be nicer to record the parent's ranges before
11498 traversing its children, simply overriding whatever you find
11499 there. But since we don't even decide whether to create a
11500 block until after we've traversed its children, that's hard
11502 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11504 local_symbols
= new->locals
;
11505 using_directives
= new->using_directives
;
11508 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11511 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11513 struct objfile
*objfile
= cu
->objfile
;
11514 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11515 CORE_ADDR pc
, baseaddr
;
11516 struct attribute
*attr
;
11517 struct call_site
*call_site
, call_site_local
;
11520 struct die_info
*child_die
;
11522 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11524 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11527 complaint (&symfile_complaints
,
11528 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11529 "DIE 0x%x [in module %s]"),
11530 die
->offset
.sect_off
, objfile_name (objfile
));
11533 pc
= attr_value_as_address (attr
) + baseaddr
;
11534 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11536 if (cu
->call_site_htab
== NULL
)
11537 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11538 NULL
, &objfile
->objfile_obstack
,
11539 hashtab_obstack_allocate
, NULL
);
11540 call_site_local
.pc
= pc
;
11541 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11544 complaint (&symfile_complaints
,
11545 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11546 "DIE 0x%x [in module %s]"),
11547 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11548 objfile_name (objfile
));
11552 /* Count parameters at the caller. */
11555 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11556 child_die
= sibling_die (child_die
))
11558 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11560 complaint (&symfile_complaints
,
11561 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11562 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11563 child_die
->tag
, child_die
->offset
.sect_off
,
11564 objfile_name (objfile
));
11571 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11572 (sizeof (*call_site
)
11573 + (sizeof (*call_site
->parameter
)
11574 * (nparams
- 1))));
11576 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11577 call_site
->pc
= pc
;
11579 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11581 struct die_info
*func_die
;
11583 /* Skip also over DW_TAG_inlined_subroutine. */
11584 for (func_die
= die
->parent
;
11585 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11586 && func_die
->tag
!= DW_TAG_subroutine_type
;
11587 func_die
= func_die
->parent
);
11589 /* DW_AT_GNU_all_call_sites is a superset
11590 of DW_AT_GNU_all_tail_call_sites. */
11592 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11593 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11595 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11596 not complete. But keep CALL_SITE for look ups via call_site_htab,
11597 both the initial caller containing the real return address PC and
11598 the final callee containing the current PC of a chain of tail
11599 calls do not need to have the tail call list complete. But any
11600 function candidate for a virtual tail call frame searched via
11601 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11602 determined unambiguously. */
11606 struct type
*func_type
= NULL
;
11609 func_type
= get_die_type (func_die
, cu
);
11610 if (func_type
!= NULL
)
11612 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11614 /* Enlist this call site to the function. */
11615 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11616 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11619 complaint (&symfile_complaints
,
11620 _("Cannot find function owning DW_TAG_GNU_call_site "
11621 "DIE 0x%x [in module %s]"),
11622 die
->offset
.sect_off
, objfile_name (objfile
));
11626 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11628 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11629 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11630 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11631 /* Keep NULL DWARF_BLOCK. */;
11632 else if (attr_form_is_block (attr
))
11634 struct dwarf2_locexpr_baton
*dlbaton
;
11636 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11637 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11638 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11639 dlbaton
->per_cu
= cu
->per_cu
;
11641 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11643 else if (attr_form_is_ref (attr
))
11645 struct dwarf2_cu
*target_cu
= cu
;
11646 struct die_info
*target_die
;
11648 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11649 gdb_assert (target_cu
->objfile
== objfile
);
11650 if (die_is_declaration (target_die
, target_cu
))
11652 const char *target_physname
= NULL
;
11653 struct attribute
*target_attr
;
11655 /* Prefer the mangled name; otherwise compute the demangled one. */
11656 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11657 if (target_attr
== NULL
)
11658 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11660 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11661 target_physname
= DW_STRING (target_attr
);
11663 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11664 if (target_physname
== NULL
)
11665 complaint (&symfile_complaints
,
11666 _("DW_AT_GNU_call_site_target target DIE has invalid "
11667 "physname, for referencing DIE 0x%x [in module %s]"),
11668 die
->offset
.sect_off
, objfile_name (objfile
));
11670 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11676 /* DW_AT_entry_pc should be preferred. */
11677 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11678 complaint (&symfile_complaints
,
11679 _("DW_AT_GNU_call_site_target target DIE has invalid "
11680 "low pc, for referencing DIE 0x%x [in module %s]"),
11681 die
->offset
.sect_off
, objfile_name (objfile
));
11684 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11685 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11690 complaint (&symfile_complaints
,
11691 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11692 "block nor reference, for DIE 0x%x [in module %s]"),
11693 die
->offset
.sect_off
, objfile_name (objfile
));
11695 call_site
->per_cu
= cu
->per_cu
;
11697 for (child_die
= die
->child
;
11698 child_die
&& child_die
->tag
;
11699 child_die
= sibling_die (child_die
))
11701 struct call_site_parameter
*parameter
;
11702 struct attribute
*loc
, *origin
;
11704 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11706 /* Already printed the complaint above. */
11710 gdb_assert (call_site
->parameter_count
< nparams
);
11711 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11713 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11714 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11715 register is contained in DW_AT_GNU_call_site_value. */
11717 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11718 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11719 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11721 sect_offset offset
;
11723 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11724 offset
= dwarf2_get_ref_die_offset (origin
);
11725 if (!offset_in_cu_p (&cu
->header
, offset
))
11727 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11728 binding can be done only inside one CU. Such referenced DIE
11729 therefore cannot be even moved to DW_TAG_partial_unit. */
11730 complaint (&symfile_complaints
,
11731 _("DW_AT_abstract_origin offset is not in CU for "
11732 "DW_TAG_GNU_call_site child DIE 0x%x "
11734 child_die
->offset
.sect_off
, objfile_name (objfile
));
11737 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11738 - cu
->header
.offset
.sect_off
);
11740 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11742 complaint (&symfile_complaints
,
11743 _("No DW_FORM_block* DW_AT_location for "
11744 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11745 child_die
->offset
.sect_off
, objfile_name (objfile
));
11750 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11751 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11752 if (parameter
->u
.dwarf_reg
!= -1)
11753 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11754 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11755 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11756 ¶meter
->u
.fb_offset
))
11757 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11760 complaint (&symfile_complaints
,
11761 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11762 "for DW_FORM_block* DW_AT_location is supported for "
11763 "DW_TAG_GNU_call_site child DIE 0x%x "
11765 child_die
->offset
.sect_off
, objfile_name (objfile
));
11770 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11771 if (!attr_form_is_block (attr
))
11773 complaint (&symfile_complaints
,
11774 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11775 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11776 child_die
->offset
.sect_off
, objfile_name (objfile
));
11779 parameter
->value
= DW_BLOCK (attr
)->data
;
11780 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11782 /* Parameters are not pre-cleared by memset above. */
11783 parameter
->data_value
= NULL
;
11784 parameter
->data_value_size
= 0;
11785 call_site
->parameter_count
++;
11787 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11790 if (!attr_form_is_block (attr
))
11791 complaint (&symfile_complaints
,
11792 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11793 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11794 child_die
->offset
.sect_off
, objfile_name (objfile
));
11797 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11798 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11804 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11805 Return 1 if the attributes are present and valid, otherwise, return 0.
11806 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11809 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11810 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11811 struct partial_symtab
*ranges_pst
)
11813 struct objfile
*objfile
= cu
->objfile
;
11814 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11815 struct comp_unit_head
*cu_header
= &cu
->header
;
11816 bfd
*obfd
= objfile
->obfd
;
11817 unsigned int addr_size
= cu_header
->addr_size
;
11818 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11819 /* Base address selection entry. */
11822 unsigned int dummy
;
11823 const gdb_byte
*buffer
;
11827 CORE_ADDR high
= 0;
11828 CORE_ADDR baseaddr
;
11830 found_base
= cu
->base_known
;
11831 base
= cu
->base_address
;
11833 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11834 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11836 complaint (&symfile_complaints
,
11837 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11841 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11843 /* Read in the largest possible address. */
11844 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11845 if ((marker
& mask
) == mask
)
11847 /* If we found the largest possible address, then
11848 read the base address. */
11849 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11850 buffer
+= 2 * addr_size
;
11851 offset
+= 2 * addr_size
;
11857 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11861 CORE_ADDR range_beginning
, range_end
;
11863 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11864 buffer
+= addr_size
;
11865 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11866 buffer
+= addr_size
;
11867 offset
+= 2 * addr_size
;
11869 /* An end of list marker is a pair of zero addresses. */
11870 if (range_beginning
== 0 && range_end
== 0)
11871 /* Found the end of list entry. */
11874 /* Each base address selection entry is a pair of 2 values.
11875 The first is the largest possible address, the second is
11876 the base address. Check for a base address here. */
11877 if ((range_beginning
& mask
) == mask
)
11879 /* If we found the largest possible address, then
11880 read the base address. */
11881 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11888 /* We have no valid base address for the ranges
11890 complaint (&symfile_complaints
,
11891 _("Invalid .debug_ranges data (no base address)"));
11895 if (range_beginning
> range_end
)
11897 /* Inverted range entries are invalid. */
11898 complaint (&symfile_complaints
,
11899 _("Invalid .debug_ranges data (inverted range)"));
11903 /* Empty range entries have no effect. */
11904 if (range_beginning
== range_end
)
11907 range_beginning
+= base
;
11910 /* A not-uncommon case of bad debug info.
11911 Don't pollute the addrmap with bad data. */
11912 if (range_beginning
+ baseaddr
== 0
11913 && !dwarf2_per_objfile
->has_section_at_zero
)
11915 complaint (&symfile_complaints
,
11916 _(".debug_ranges entry has start address of zero"
11917 " [in module %s]"), objfile_name (objfile
));
11921 if (ranges_pst
!= NULL
)
11926 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11927 range_beginning
+ baseaddr
);
11928 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11929 range_end
+ baseaddr
);
11930 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11934 /* FIXME: This is recording everything as a low-high
11935 segment of consecutive addresses. We should have a
11936 data structure for discontiguous block ranges
11940 low
= range_beginning
;
11946 if (range_beginning
< low
)
11947 low
= range_beginning
;
11948 if (range_end
> high
)
11954 /* If the first entry is an end-of-list marker, the range
11955 describes an empty scope, i.e. no instructions. */
11961 *high_return
= high
;
11965 /* Get low and high pc attributes from a die. Return 1 if the attributes
11966 are present and valid, otherwise, return 0. Return -1 if the range is
11967 discontinuous, i.e. derived from DW_AT_ranges information. */
11970 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
11971 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
11972 struct partial_symtab
*pst
)
11974 struct attribute
*attr
;
11975 struct attribute
*attr_high
;
11977 CORE_ADDR high
= 0;
11980 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
11983 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11986 low
= attr_value_as_address (attr
);
11987 high
= attr_value_as_address (attr_high
);
11988 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
11992 /* Found high w/o low attribute. */
11995 /* Found consecutive range of addresses. */
12000 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12003 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12004 We take advantage of the fact that DW_AT_ranges does not appear
12005 in DW_TAG_compile_unit of DWO files. */
12006 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12007 unsigned int ranges_offset
= (DW_UNSND (attr
)
12008 + (need_ranges_base
12012 /* Value of the DW_AT_ranges attribute is the offset in the
12013 .debug_ranges section. */
12014 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12016 /* Found discontinuous range of addresses. */
12021 /* read_partial_die has also the strict LOW < HIGH requirement. */
12025 /* When using the GNU linker, .gnu.linkonce. sections are used to
12026 eliminate duplicate copies of functions and vtables and such.
12027 The linker will arbitrarily choose one and discard the others.
12028 The AT_*_pc values for such functions refer to local labels in
12029 these sections. If the section from that file was discarded, the
12030 labels are not in the output, so the relocs get a value of 0.
12031 If this is a discarded function, mark the pc bounds as invalid,
12032 so that GDB will ignore it. */
12033 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12042 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12043 its low and high PC addresses. Do nothing if these addresses could not
12044 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12045 and HIGHPC to the high address if greater than HIGHPC. */
12048 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12049 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12050 struct dwarf2_cu
*cu
)
12052 CORE_ADDR low
, high
;
12053 struct die_info
*child
= die
->child
;
12055 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12057 *lowpc
= min (*lowpc
, low
);
12058 *highpc
= max (*highpc
, high
);
12061 /* If the language does not allow nested subprograms (either inside
12062 subprograms or lexical blocks), we're done. */
12063 if (cu
->language
!= language_ada
)
12066 /* Check all the children of the given DIE. If it contains nested
12067 subprograms, then check their pc bounds. Likewise, we need to
12068 check lexical blocks as well, as they may also contain subprogram
12070 while (child
&& child
->tag
)
12072 if (child
->tag
== DW_TAG_subprogram
12073 || child
->tag
== DW_TAG_lexical_block
)
12074 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12075 child
= sibling_die (child
);
12079 /* Get the low and high pc's represented by the scope DIE, and store
12080 them in *LOWPC and *HIGHPC. If the correct values can't be
12081 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12084 get_scope_pc_bounds (struct die_info
*die
,
12085 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12086 struct dwarf2_cu
*cu
)
12088 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12089 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12090 CORE_ADDR current_low
, current_high
;
12092 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12094 best_low
= current_low
;
12095 best_high
= current_high
;
12099 struct die_info
*child
= die
->child
;
12101 while (child
&& child
->tag
)
12103 switch (child
->tag
) {
12104 case DW_TAG_subprogram
:
12105 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12107 case DW_TAG_namespace
:
12108 case DW_TAG_module
:
12109 /* FIXME: carlton/2004-01-16: Should we do this for
12110 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12111 that current GCC's always emit the DIEs corresponding
12112 to definitions of methods of classes as children of a
12113 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12114 the DIEs giving the declarations, which could be
12115 anywhere). But I don't see any reason why the
12116 standards says that they have to be there. */
12117 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12119 if (current_low
!= ((CORE_ADDR
) -1))
12121 best_low
= min (best_low
, current_low
);
12122 best_high
= max (best_high
, current_high
);
12130 child
= sibling_die (child
);
12135 *highpc
= best_high
;
12138 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12142 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12143 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12145 struct objfile
*objfile
= cu
->objfile
;
12146 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12147 struct attribute
*attr
;
12148 struct attribute
*attr_high
;
12150 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12153 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12156 CORE_ADDR low
= attr_value_as_address (attr
);
12157 CORE_ADDR high
= attr_value_as_address (attr_high
);
12159 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12162 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12163 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12164 record_block_range (block
, low
, high
- 1);
12168 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12171 bfd
*obfd
= objfile
->obfd
;
12172 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12173 We take advantage of the fact that DW_AT_ranges does not appear
12174 in DW_TAG_compile_unit of DWO files. */
12175 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12177 /* The value of the DW_AT_ranges attribute is the offset of the
12178 address range list in the .debug_ranges section. */
12179 unsigned long offset
= (DW_UNSND (attr
)
12180 + (need_ranges_base
? cu
->ranges_base
: 0));
12181 const gdb_byte
*buffer
;
12183 /* For some target architectures, but not others, the
12184 read_address function sign-extends the addresses it returns.
12185 To recognize base address selection entries, we need a
12187 unsigned int addr_size
= cu
->header
.addr_size
;
12188 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12190 /* The base address, to which the next pair is relative. Note
12191 that this 'base' is a DWARF concept: most entries in a range
12192 list are relative, to reduce the number of relocs against the
12193 debugging information. This is separate from this function's
12194 'baseaddr' argument, which GDB uses to relocate debugging
12195 information from a shared library based on the address at
12196 which the library was loaded. */
12197 CORE_ADDR base
= cu
->base_address
;
12198 int base_known
= cu
->base_known
;
12200 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12201 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12203 complaint (&symfile_complaints
,
12204 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12208 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12212 unsigned int bytes_read
;
12213 CORE_ADDR start
, end
;
12215 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12216 buffer
+= bytes_read
;
12217 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12218 buffer
+= bytes_read
;
12220 /* Did we find the end of the range list? */
12221 if (start
== 0 && end
== 0)
12224 /* Did we find a base address selection entry? */
12225 else if ((start
& base_select_mask
) == base_select_mask
)
12231 /* We found an ordinary address range. */
12236 complaint (&symfile_complaints
,
12237 _("Invalid .debug_ranges data "
12238 "(no base address)"));
12244 /* Inverted range entries are invalid. */
12245 complaint (&symfile_complaints
,
12246 _("Invalid .debug_ranges data "
12247 "(inverted range)"));
12251 /* Empty range entries have no effect. */
12255 start
+= base
+ baseaddr
;
12256 end
+= base
+ baseaddr
;
12258 /* A not-uncommon case of bad debug info.
12259 Don't pollute the addrmap with bad data. */
12260 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12262 complaint (&symfile_complaints
,
12263 _(".debug_ranges entry has start address of zero"
12264 " [in module %s]"), objfile_name (objfile
));
12268 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12269 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12270 record_block_range (block
, start
, end
- 1);
12276 /* Check whether the producer field indicates either of GCC < 4.6, or the
12277 Intel C/C++ compiler, and cache the result in CU. */
12280 check_producer (struct dwarf2_cu
*cu
)
12285 if (cu
->producer
== NULL
)
12287 /* For unknown compilers expect their behavior is DWARF version
12290 GCC started to support .debug_types sections by -gdwarf-4 since
12291 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12292 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12293 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12294 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12296 else if ((major
= producer_is_gcc (cu
->producer
, &minor
)) > 0)
12298 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12299 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12301 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
12302 cu
->producer_is_icc
= 1;
12305 /* For other non-GCC compilers, expect their behavior is DWARF version
12309 cu
->checked_producer
= 1;
12312 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12313 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12314 during 4.6.0 experimental. */
12317 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12319 if (!cu
->checked_producer
)
12320 check_producer (cu
);
12322 return cu
->producer_is_gxx_lt_4_6
;
12325 /* Return the default accessibility type if it is not overriden by
12326 DW_AT_accessibility. */
12328 static enum dwarf_access_attribute
12329 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12331 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12333 /* The default DWARF 2 accessibility for members is public, the default
12334 accessibility for inheritance is private. */
12336 if (die
->tag
!= DW_TAG_inheritance
)
12337 return DW_ACCESS_public
;
12339 return DW_ACCESS_private
;
12343 /* DWARF 3+ defines the default accessibility a different way. The same
12344 rules apply now for DW_TAG_inheritance as for the members and it only
12345 depends on the container kind. */
12347 if (die
->parent
->tag
== DW_TAG_class_type
)
12348 return DW_ACCESS_private
;
12350 return DW_ACCESS_public
;
12354 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12355 offset. If the attribute was not found return 0, otherwise return
12356 1. If it was found but could not properly be handled, set *OFFSET
12360 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12363 struct attribute
*attr
;
12365 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12370 /* Note that we do not check for a section offset first here.
12371 This is because DW_AT_data_member_location is new in DWARF 4,
12372 so if we see it, we can assume that a constant form is really
12373 a constant and not a section offset. */
12374 if (attr_form_is_constant (attr
))
12375 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12376 else if (attr_form_is_section_offset (attr
))
12377 dwarf2_complex_location_expr_complaint ();
12378 else if (attr_form_is_block (attr
))
12379 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12381 dwarf2_complex_location_expr_complaint ();
12389 /* Add an aggregate field to the field list. */
12392 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12393 struct dwarf2_cu
*cu
)
12395 struct objfile
*objfile
= cu
->objfile
;
12396 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12397 struct nextfield
*new_field
;
12398 struct attribute
*attr
;
12400 const char *fieldname
= "";
12402 /* Allocate a new field list entry and link it in. */
12403 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12404 make_cleanup (xfree
, new_field
);
12405 memset (new_field
, 0, sizeof (struct nextfield
));
12407 if (die
->tag
== DW_TAG_inheritance
)
12409 new_field
->next
= fip
->baseclasses
;
12410 fip
->baseclasses
= new_field
;
12414 new_field
->next
= fip
->fields
;
12415 fip
->fields
= new_field
;
12419 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12421 new_field
->accessibility
= DW_UNSND (attr
);
12423 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12424 if (new_field
->accessibility
!= DW_ACCESS_public
)
12425 fip
->non_public_fields
= 1;
12427 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12429 new_field
->virtuality
= DW_UNSND (attr
);
12431 new_field
->virtuality
= DW_VIRTUALITY_none
;
12433 fp
= &new_field
->field
;
12435 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12439 /* Data member other than a C++ static data member. */
12441 /* Get type of field. */
12442 fp
->type
= die_type (die
, cu
);
12444 SET_FIELD_BITPOS (*fp
, 0);
12446 /* Get bit size of field (zero if none). */
12447 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12450 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12454 FIELD_BITSIZE (*fp
) = 0;
12457 /* Get bit offset of field. */
12458 if (handle_data_member_location (die
, cu
, &offset
))
12459 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12460 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12463 if (gdbarch_bits_big_endian (gdbarch
))
12465 /* For big endian bits, the DW_AT_bit_offset gives the
12466 additional bit offset from the MSB of the containing
12467 anonymous object to the MSB of the field. We don't
12468 have to do anything special since we don't need to
12469 know the size of the anonymous object. */
12470 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12474 /* For little endian bits, compute the bit offset to the
12475 MSB of the anonymous object, subtract off the number of
12476 bits from the MSB of the field to the MSB of the
12477 object, and then subtract off the number of bits of
12478 the field itself. The result is the bit offset of
12479 the LSB of the field. */
12480 int anonymous_size
;
12481 int bit_offset
= DW_UNSND (attr
);
12483 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12486 /* The size of the anonymous object containing
12487 the bit field is explicit, so use the
12488 indicated size (in bytes). */
12489 anonymous_size
= DW_UNSND (attr
);
12493 /* The size of the anonymous object containing
12494 the bit field must be inferred from the type
12495 attribute of the data member containing the
12497 anonymous_size
= TYPE_LENGTH (fp
->type
);
12499 SET_FIELD_BITPOS (*fp
,
12500 (FIELD_BITPOS (*fp
)
12501 + anonymous_size
* bits_per_byte
12502 - bit_offset
- FIELD_BITSIZE (*fp
)));
12506 /* Get name of field. */
12507 fieldname
= dwarf2_name (die
, cu
);
12508 if (fieldname
== NULL
)
12511 /* The name is already allocated along with this objfile, so we don't
12512 need to duplicate it for the type. */
12513 fp
->name
= fieldname
;
12515 /* Change accessibility for artificial fields (e.g. virtual table
12516 pointer or virtual base class pointer) to private. */
12517 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12519 FIELD_ARTIFICIAL (*fp
) = 1;
12520 new_field
->accessibility
= DW_ACCESS_private
;
12521 fip
->non_public_fields
= 1;
12524 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12526 /* C++ static member. */
12528 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12529 is a declaration, but all versions of G++ as of this writing
12530 (so through at least 3.2.1) incorrectly generate
12531 DW_TAG_variable tags. */
12533 const char *physname
;
12535 /* Get name of field. */
12536 fieldname
= dwarf2_name (die
, cu
);
12537 if (fieldname
== NULL
)
12540 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12542 /* Only create a symbol if this is an external value.
12543 new_symbol checks this and puts the value in the global symbol
12544 table, which we want. If it is not external, new_symbol
12545 will try to put the value in cu->list_in_scope which is wrong. */
12546 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12548 /* A static const member, not much different than an enum as far as
12549 we're concerned, except that we can support more types. */
12550 new_symbol (die
, NULL
, cu
);
12553 /* Get physical name. */
12554 physname
= dwarf2_physname (fieldname
, die
, cu
);
12556 /* The name is already allocated along with this objfile, so we don't
12557 need to duplicate it for the type. */
12558 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12559 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12560 FIELD_NAME (*fp
) = fieldname
;
12562 else if (die
->tag
== DW_TAG_inheritance
)
12566 /* C++ base class field. */
12567 if (handle_data_member_location (die
, cu
, &offset
))
12568 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12569 FIELD_BITSIZE (*fp
) = 0;
12570 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12571 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12572 fip
->nbaseclasses
++;
12576 /* Add a typedef defined in the scope of the FIP's class. */
12579 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12580 struct dwarf2_cu
*cu
)
12582 struct objfile
*objfile
= cu
->objfile
;
12583 struct typedef_field_list
*new_field
;
12584 struct attribute
*attr
;
12585 struct typedef_field
*fp
;
12586 char *fieldname
= "";
12588 /* Allocate a new field list entry and link it in. */
12589 new_field
= xzalloc (sizeof (*new_field
));
12590 make_cleanup (xfree
, new_field
);
12592 gdb_assert (die
->tag
== DW_TAG_typedef
);
12594 fp
= &new_field
->field
;
12596 /* Get name of field. */
12597 fp
->name
= dwarf2_name (die
, cu
);
12598 if (fp
->name
== NULL
)
12601 fp
->type
= read_type_die (die
, cu
);
12603 new_field
->next
= fip
->typedef_field_list
;
12604 fip
->typedef_field_list
= new_field
;
12605 fip
->typedef_field_list_count
++;
12608 /* Create the vector of fields, and attach it to the type. */
12611 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12612 struct dwarf2_cu
*cu
)
12614 int nfields
= fip
->nfields
;
12616 /* Record the field count, allocate space for the array of fields,
12617 and create blank accessibility bitfields if necessary. */
12618 TYPE_NFIELDS (type
) = nfields
;
12619 TYPE_FIELDS (type
) = (struct field
*)
12620 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12621 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12623 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12625 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12627 TYPE_FIELD_PRIVATE_BITS (type
) =
12628 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12629 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12631 TYPE_FIELD_PROTECTED_BITS (type
) =
12632 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12633 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12635 TYPE_FIELD_IGNORE_BITS (type
) =
12636 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12637 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12640 /* If the type has baseclasses, allocate and clear a bit vector for
12641 TYPE_FIELD_VIRTUAL_BITS. */
12642 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12644 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12645 unsigned char *pointer
;
12647 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12648 pointer
= TYPE_ALLOC (type
, num_bytes
);
12649 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12650 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12651 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12654 /* Copy the saved-up fields into the field vector. Start from the head of
12655 the list, adding to the tail of the field array, so that they end up in
12656 the same order in the array in which they were added to the list. */
12657 while (nfields
-- > 0)
12659 struct nextfield
*fieldp
;
12663 fieldp
= fip
->fields
;
12664 fip
->fields
= fieldp
->next
;
12668 fieldp
= fip
->baseclasses
;
12669 fip
->baseclasses
= fieldp
->next
;
12672 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12673 switch (fieldp
->accessibility
)
12675 case DW_ACCESS_private
:
12676 if (cu
->language
!= language_ada
)
12677 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12680 case DW_ACCESS_protected
:
12681 if (cu
->language
!= language_ada
)
12682 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12685 case DW_ACCESS_public
:
12689 /* Unknown accessibility. Complain and treat it as public. */
12691 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12692 fieldp
->accessibility
);
12696 if (nfields
< fip
->nbaseclasses
)
12698 switch (fieldp
->virtuality
)
12700 case DW_VIRTUALITY_virtual
:
12701 case DW_VIRTUALITY_pure_virtual
:
12702 if (cu
->language
== language_ada
)
12703 error (_("unexpected virtuality in component of Ada type"));
12704 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12711 /* Return true if this member function is a constructor, false
12715 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12717 const char *fieldname
;
12718 const char *typename
;
12721 if (die
->parent
== NULL
)
12724 if (die
->parent
->tag
!= DW_TAG_structure_type
12725 && die
->parent
->tag
!= DW_TAG_union_type
12726 && die
->parent
->tag
!= DW_TAG_class_type
)
12729 fieldname
= dwarf2_name (die
, cu
);
12730 typename
= dwarf2_name (die
->parent
, cu
);
12731 if (fieldname
== NULL
|| typename
== NULL
)
12734 len
= strlen (fieldname
);
12735 return (strncmp (fieldname
, typename
, len
) == 0
12736 && (typename
[len
] == '\0' || typename
[len
] == '<'));
12739 /* Add a member function to the proper fieldlist. */
12742 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12743 struct type
*type
, struct dwarf2_cu
*cu
)
12745 struct objfile
*objfile
= cu
->objfile
;
12746 struct attribute
*attr
;
12747 struct fnfieldlist
*flp
;
12749 struct fn_field
*fnp
;
12750 const char *fieldname
;
12751 struct nextfnfield
*new_fnfield
;
12752 struct type
*this_type
;
12753 enum dwarf_access_attribute accessibility
;
12755 if (cu
->language
== language_ada
)
12756 error (_("unexpected member function in Ada type"));
12758 /* Get name of member function. */
12759 fieldname
= dwarf2_name (die
, cu
);
12760 if (fieldname
== NULL
)
12763 /* Look up member function name in fieldlist. */
12764 for (i
= 0; i
< fip
->nfnfields
; i
++)
12766 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12770 /* Create new list element if necessary. */
12771 if (i
< fip
->nfnfields
)
12772 flp
= &fip
->fnfieldlists
[i
];
12775 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12777 fip
->fnfieldlists
= (struct fnfieldlist
*)
12778 xrealloc (fip
->fnfieldlists
,
12779 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12780 * sizeof (struct fnfieldlist
));
12781 if (fip
->nfnfields
== 0)
12782 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12784 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12785 flp
->name
= fieldname
;
12788 i
= fip
->nfnfields
++;
12791 /* Create a new member function field and chain it to the field list
12793 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12794 make_cleanup (xfree
, new_fnfield
);
12795 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12796 new_fnfield
->next
= flp
->head
;
12797 flp
->head
= new_fnfield
;
12800 /* Fill in the member function field info. */
12801 fnp
= &new_fnfield
->fnfield
;
12803 /* Delay processing of the physname until later. */
12804 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12806 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12811 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12812 fnp
->physname
= physname
? physname
: "";
12815 fnp
->type
= alloc_type (objfile
);
12816 this_type
= read_type_die (die
, cu
);
12817 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12819 int nparams
= TYPE_NFIELDS (this_type
);
12821 /* TYPE is the domain of this method, and THIS_TYPE is the type
12822 of the method itself (TYPE_CODE_METHOD). */
12823 smash_to_method_type (fnp
->type
, type
,
12824 TYPE_TARGET_TYPE (this_type
),
12825 TYPE_FIELDS (this_type
),
12826 TYPE_NFIELDS (this_type
),
12827 TYPE_VARARGS (this_type
));
12829 /* Handle static member functions.
12830 Dwarf2 has no clean way to discern C++ static and non-static
12831 member functions. G++ helps GDB by marking the first
12832 parameter for non-static member functions (which is the this
12833 pointer) as artificial. We obtain this information from
12834 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12835 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12836 fnp
->voffset
= VOFFSET_STATIC
;
12839 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12840 dwarf2_full_name (fieldname
, die
, cu
));
12842 /* Get fcontext from DW_AT_containing_type if present. */
12843 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12844 fnp
->fcontext
= die_containing_type (die
, cu
);
12846 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12847 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12849 /* Get accessibility. */
12850 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12852 accessibility
= DW_UNSND (attr
);
12854 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12855 switch (accessibility
)
12857 case DW_ACCESS_private
:
12858 fnp
->is_private
= 1;
12860 case DW_ACCESS_protected
:
12861 fnp
->is_protected
= 1;
12865 /* Check for artificial methods. */
12866 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12867 if (attr
&& DW_UNSND (attr
) != 0)
12868 fnp
->is_artificial
= 1;
12870 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12872 /* Get index in virtual function table if it is a virtual member
12873 function. For older versions of GCC, this is an offset in the
12874 appropriate virtual table, as specified by DW_AT_containing_type.
12875 For everyone else, it is an expression to be evaluated relative
12876 to the object address. */
12878 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12881 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12883 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12885 /* Old-style GCC. */
12886 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12888 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12889 || (DW_BLOCK (attr
)->size
> 1
12890 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12891 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12893 struct dwarf_block blk
;
12896 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12898 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12899 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12900 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12901 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12902 dwarf2_complex_location_expr_complaint ();
12904 fnp
->voffset
/= cu
->header
.addr_size
;
12908 dwarf2_complex_location_expr_complaint ();
12910 if (!fnp
->fcontext
)
12911 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12913 else if (attr_form_is_section_offset (attr
))
12915 dwarf2_complex_location_expr_complaint ();
12919 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12925 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12926 if (attr
&& DW_UNSND (attr
))
12928 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12929 complaint (&symfile_complaints
,
12930 _("Member function \"%s\" (offset %d) is virtual "
12931 "but the vtable offset is not specified"),
12932 fieldname
, die
->offset
.sect_off
);
12933 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12934 TYPE_CPLUS_DYNAMIC (type
) = 1;
12939 /* Create the vector of member function fields, and attach it to the type. */
12942 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
12943 struct dwarf2_cu
*cu
)
12945 struct fnfieldlist
*flp
;
12948 if (cu
->language
== language_ada
)
12949 error (_("unexpected member functions in Ada type"));
12951 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12952 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
12953 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
12955 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
12957 struct nextfnfield
*nfp
= flp
->head
;
12958 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
12961 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
12962 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
12963 fn_flp
->fn_fields
= (struct fn_field
*)
12964 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
12965 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
12966 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
12969 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
12972 /* Returns non-zero if NAME is the name of a vtable member in CU's
12973 language, zero otherwise. */
12975 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
12977 static const char vptr
[] = "_vptr";
12978 static const char vtable
[] = "vtable";
12980 /* Look for the C++ and Java forms of the vtable. */
12981 if ((cu
->language
== language_java
12982 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
12983 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
12984 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
12990 /* GCC outputs unnamed structures that are really pointers to member
12991 functions, with the ABI-specified layout. If TYPE describes
12992 such a structure, smash it into a member function type.
12994 GCC shouldn't do this; it should just output pointer to member DIEs.
12995 This is GCC PR debug/28767. */
12998 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13000 struct type
*pfn_type
, *self_type
, *new_type
;
13002 /* Check for a structure with no name and two children. */
13003 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13006 /* Check for __pfn and __delta members. */
13007 if (TYPE_FIELD_NAME (type
, 0) == NULL
13008 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13009 || TYPE_FIELD_NAME (type
, 1) == NULL
13010 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13013 /* Find the type of the method. */
13014 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13015 if (pfn_type
== NULL
13016 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13017 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13020 /* Look for the "this" argument. */
13021 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13022 if (TYPE_NFIELDS (pfn_type
) == 0
13023 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13024 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13027 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13028 new_type
= alloc_type (objfile
);
13029 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13030 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13031 TYPE_VARARGS (pfn_type
));
13032 smash_to_methodptr_type (type
, new_type
);
13035 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13039 producer_is_icc (struct dwarf2_cu
*cu
)
13041 if (!cu
->checked_producer
)
13042 check_producer (cu
);
13044 return cu
->producer_is_icc
;
13047 /* Called when we find the DIE that starts a structure or union scope
13048 (definition) to create a type for the structure or union. Fill in
13049 the type's name and general properties; the members will not be
13050 processed until process_structure_scope. A symbol table entry for
13051 the type will also not be done until process_structure_scope (assuming
13052 the type has a name).
13054 NOTE: we need to call these functions regardless of whether or not the
13055 DIE has a DW_AT_name attribute, since it might be an anonymous
13056 structure or union. This gets the type entered into our set of
13057 user defined types. */
13059 static struct type
*
13060 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13062 struct objfile
*objfile
= cu
->objfile
;
13064 struct attribute
*attr
;
13067 /* If the definition of this type lives in .debug_types, read that type.
13068 Don't follow DW_AT_specification though, that will take us back up
13069 the chain and we want to go down. */
13070 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13073 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13075 /* The type's CU may not be the same as CU.
13076 Ensure TYPE is recorded with CU in die_type_hash. */
13077 return set_die_type (die
, type
, cu
);
13080 type
= alloc_type (objfile
);
13081 INIT_CPLUS_SPECIFIC (type
);
13083 name
= dwarf2_name (die
, cu
);
13086 if (cu
->language
== language_cplus
13087 || cu
->language
== language_java
)
13089 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13091 /* dwarf2_full_name might have already finished building the DIE's
13092 type. If so, there is no need to continue. */
13093 if (get_die_type (die
, cu
) != NULL
)
13094 return get_die_type (die
, cu
);
13096 TYPE_TAG_NAME (type
) = full_name
;
13097 if (die
->tag
== DW_TAG_structure_type
13098 || die
->tag
== DW_TAG_class_type
)
13099 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13103 /* The name is already allocated along with this objfile, so
13104 we don't need to duplicate it for the type. */
13105 TYPE_TAG_NAME (type
) = name
;
13106 if (die
->tag
== DW_TAG_class_type
)
13107 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13111 if (die
->tag
== DW_TAG_structure_type
)
13113 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13115 else if (die
->tag
== DW_TAG_union_type
)
13117 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13121 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13124 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13125 TYPE_DECLARED_CLASS (type
) = 1;
13127 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13130 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13134 TYPE_LENGTH (type
) = 0;
13137 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13139 /* ICC does not output the required DW_AT_declaration
13140 on incomplete types, but gives them a size of zero. */
13141 TYPE_STUB (type
) = 1;
13144 TYPE_STUB_SUPPORTED (type
) = 1;
13146 if (die_is_declaration (die
, cu
))
13147 TYPE_STUB (type
) = 1;
13148 else if (attr
== NULL
&& die
->child
== NULL
13149 && producer_is_realview (cu
->producer
))
13150 /* RealView does not output the required DW_AT_declaration
13151 on incomplete types. */
13152 TYPE_STUB (type
) = 1;
13154 /* We need to add the type field to the die immediately so we don't
13155 infinitely recurse when dealing with pointers to the structure
13156 type within the structure itself. */
13157 set_die_type (die
, type
, cu
);
13159 /* set_die_type should be already done. */
13160 set_descriptive_type (type
, die
, cu
);
13165 /* Finish creating a structure or union type, including filling in
13166 its members and creating a symbol for it. */
13169 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13171 struct objfile
*objfile
= cu
->objfile
;
13172 struct die_info
*child_die
;
13175 type
= get_die_type (die
, cu
);
13177 type
= read_structure_type (die
, cu
);
13179 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13181 struct field_info fi
;
13182 VEC (symbolp
) *template_args
= NULL
;
13183 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13185 memset (&fi
, 0, sizeof (struct field_info
));
13187 child_die
= die
->child
;
13189 while (child_die
&& child_die
->tag
)
13191 if (child_die
->tag
== DW_TAG_member
13192 || child_die
->tag
== DW_TAG_variable
)
13194 /* NOTE: carlton/2002-11-05: A C++ static data member
13195 should be a DW_TAG_member that is a declaration, but
13196 all versions of G++ as of this writing (so through at
13197 least 3.2.1) incorrectly generate DW_TAG_variable
13198 tags for them instead. */
13199 dwarf2_add_field (&fi
, child_die
, cu
);
13201 else if (child_die
->tag
== DW_TAG_subprogram
)
13203 /* C++ member function. */
13204 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13206 else if (child_die
->tag
== DW_TAG_inheritance
)
13208 /* C++ base class field. */
13209 dwarf2_add_field (&fi
, child_die
, cu
);
13211 else if (child_die
->tag
== DW_TAG_typedef
)
13212 dwarf2_add_typedef (&fi
, child_die
, cu
);
13213 else if (child_die
->tag
== DW_TAG_template_type_param
13214 || child_die
->tag
== DW_TAG_template_value_param
)
13216 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13219 VEC_safe_push (symbolp
, template_args
, arg
);
13222 child_die
= sibling_die (child_die
);
13225 /* Attach template arguments to type. */
13226 if (! VEC_empty (symbolp
, template_args
))
13228 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13229 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13230 = VEC_length (symbolp
, template_args
);
13231 TYPE_TEMPLATE_ARGUMENTS (type
)
13232 = obstack_alloc (&objfile
->objfile_obstack
,
13233 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13234 * sizeof (struct symbol
*)));
13235 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13236 VEC_address (symbolp
, template_args
),
13237 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13238 * sizeof (struct symbol
*)));
13239 VEC_free (symbolp
, template_args
);
13242 /* Attach fields and member functions to the type. */
13244 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13247 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13249 /* Get the type which refers to the base class (possibly this
13250 class itself) which contains the vtable pointer for the current
13251 class from the DW_AT_containing_type attribute. This use of
13252 DW_AT_containing_type is a GNU extension. */
13254 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13256 struct type
*t
= die_containing_type (die
, cu
);
13258 set_type_vptr_basetype (type
, t
);
13263 /* Our own class provides vtbl ptr. */
13264 for (i
= TYPE_NFIELDS (t
) - 1;
13265 i
>= TYPE_N_BASECLASSES (t
);
13268 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13270 if (is_vtable_name (fieldname
, cu
))
13272 set_type_vptr_fieldno (type
, i
);
13277 /* Complain if virtual function table field not found. */
13278 if (i
< TYPE_N_BASECLASSES (t
))
13279 complaint (&symfile_complaints
,
13280 _("virtual function table pointer "
13281 "not found when defining class '%s'"),
13282 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13287 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13290 else if (cu
->producer
13291 && strncmp (cu
->producer
,
13292 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
13294 /* The IBM XLC compiler does not provide direct indication
13295 of the containing type, but the vtable pointer is
13296 always named __vfp. */
13300 for (i
= TYPE_NFIELDS (type
) - 1;
13301 i
>= TYPE_N_BASECLASSES (type
);
13304 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13306 set_type_vptr_fieldno (type
, i
);
13307 set_type_vptr_basetype (type
, type
);
13314 /* Copy fi.typedef_field_list linked list elements content into the
13315 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13316 if (fi
.typedef_field_list
)
13318 int i
= fi
.typedef_field_list_count
;
13320 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13321 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13322 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13323 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13325 /* Reverse the list order to keep the debug info elements order. */
13328 struct typedef_field
*dest
, *src
;
13330 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13331 src
= &fi
.typedef_field_list
->field
;
13332 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13337 do_cleanups (back_to
);
13339 if (HAVE_CPLUS_STRUCT (type
))
13340 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13343 quirk_gcc_member_function_pointer (type
, objfile
);
13345 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13346 snapshots) has been known to create a die giving a declaration
13347 for a class that has, as a child, a die giving a definition for a
13348 nested class. So we have to process our children even if the
13349 current die is a declaration. Normally, of course, a declaration
13350 won't have any children at all. */
13352 child_die
= die
->child
;
13354 while (child_die
!= NULL
&& child_die
->tag
)
13356 if (child_die
->tag
== DW_TAG_member
13357 || child_die
->tag
== DW_TAG_variable
13358 || child_die
->tag
== DW_TAG_inheritance
13359 || child_die
->tag
== DW_TAG_template_value_param
13360 || child_die
->tag
== DW_TAG_template_type_param
)
13365 process_die (child_die
, cu
);
13367 child_die
= sibling_die (child_die
);
13370 /* Do not consider external references. According to the DWARF standard,
13371 these DIEs are identified by the fact that they have no byte_size
13372 attribute, and a declaration attribute. */
13373 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13374 || !die_is_declaration (die
, cu
))
13375 new_symbol (die
, type
, cu
);
13378 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13379 update TYPE using some information only available in DIE's children. */
13382 update_enumeration_type_from_children (struct die_info
*die
,
13384 struct dwarf2_cu
*cu
)
13386 struct obstack obstack
;
13387 struct die_info
*child_die
;
13388 int unsigned_enum
= 1;
13391 struct cleanup
*old_chain
;
13393 obstack_init (&obstack
);
13394 old_chain
= make_cleanup_obstack_free (&obstack
);
13396 for (child_die
= die
->child
;
13397 child_die
!= NULL
&& child_die
->tag
;
13398 child_die
= sibling_die (child_die
))
13400 struct attribute
*attr
;
13402 const gdb_byte
*bytes
;
13403 struct dwarf2_locexpr_baton
*baton
;
13406 if (child_die
->tag
!= DW_TAG_enumerator
)
13409 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13413 name
= dwarf2_name (child_die
, cu
);
13415 name
= "<anonymous enumerator>";
13417 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13418 &value
, &bytes
, &baton
);
13424 else if ((mask
& value
) != 0)
13429 /* If we already know that the enum type is neither unsigned, nor
13430 a flag type, no need to look at the rest of the enumerates. */
13431 if (!unsigned_enum
&& !flag_enum
)
13436 TYPE_UNSIGNED (type
) = 1;
13438 TYPE_FLAG_ENUM (type
) = 1;
13440 do_cleanups (old_chain
);
13443 /* Given a DW_AT_enumeration_type die, set its type. We do not
13444 complete the type's fields yet, or create any symbols. */
13446 static struct type
*
13447 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13449 struct objfile
*objfile
= cu
->objfile
;
13451 struct attribute
*attr
;
13454 /* If the definition of this type lives in .debug_types, read that type.
13455 Don't follow DW_AT_specification though, that will take us back up
13456 the chain and we want to go down. */
13457 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13460 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13462 /* The type's CU may not be the same as CU.
13463 Ensure TYPE is recorded with CU in die_type_hash. */
13464 return set_die_type (die
, type
, cu
);
13467 type
= alloc_type (objfile
);
13469 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13470 name
= dwarf2_full_name (NULL
, die
, cu
);
13472 TYPE_TAG_NAME (type
) = name
;
13474 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13477 struct type
*underlying_type
= die_type (die
, cu
);
13479 TYPE_TARGET_TYPE (type
) = underlying_type
;
13482 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13485 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13489 TYPE_LENGTH (type
) = 0;
13492 /* The enumeration DIE can be incomplete. In Ada, any type can be
13493 declared as private in the package spec, and then defined only
13494 inside the package body. Such types are known as Taft Amendment
13495 Types. When another package uses such a type, an incomplete DIE
13496 may be generated by the compiler. */
13497 if (die_is_declaration (die
, cu
))
13498 TYPE_STUB (type
) = 1;
13500 /* Finish the creation of this type by using the enum's children.
13501 We must call this even when the underlying type has been provided
13502 so that we can determine if we're looking at a "flag" enum. */
13503 update_enumeration_type_from_children (die
, type
, cu
);
13505 /* If this type has an underlying type that is not a stub, then we
13506 may use its attributes. We always use the "unsigned" attribute
13507 in this situation, because ordinarily we guess whether the type
13508 is unsigned -- but the guess can be wrong and the underlying type
13509 can tell us the reality. However, we defer to a local size
13510 attribute if one exists, because this lets the compiler override
13511 the underlying type if needed. */
13512 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13514 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13515 if (TYPE_LENGTH (type
) == 0)
13516 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13519 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13521 return set_die_type (die
, type
, cu
);
13524 /* Given a pointer to a die which begins an enumeration, process all
13525 the dies that define the members of the enumeration, and create the
13526 symbol for the enumeration type.
13528 NOTE: We reverse the order of the element list. */
13531 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13533 struct type
*this_type
;
13535 this_type
= get_die_type (die
, cu
);
13536 if (this_type
== NULL
)
13537 this_type
= read_enumeration_type (die
, cu
);
13539 if (die
->child
!= NULL
)
13541 struct die_info
*child_die
;
13542 struct symbol
*sym
;
13543 struct field
*fields
= NULL
;
13544 int num_fields
= 0;
13547 child_die
= die
->child
;
13548 while (child_die
&& child_die
->tag
)
13550 if (child_die
->tag
!= DW_TAG_enumerator
)
13552 process_die (child_die
, cu
);
13556 name
= dwarf2_name (child_die
, cu
);
13559 sym
= new_symbol (child_die
, this_type
, cu
);
13561 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13563 fields
= (struct field
*)
13565 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13566 * sizeof (struct field
));
13569 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13570 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13571 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13572 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13578 child_die
= sibling_die (child_die
);
13583 TYPE_NFIELDS (this_type
) = num_fields
;
13584 TYPE_FIELDS (this_type
) = (struct field
*)
13585 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13586 memcpy (TYPE_FIELDS (this_type
), fields
,
13587 sizeof (struct field
) * num_fields
);
13592 /* If we are reading an enum from a .debug_types unit, and the enum
13593 is a declaration, and the enum is not the signatured type in the
13594 unit, then we do not want to add a symbol for it. Adding a
13595 symbol would in some cases obscure the true definition of the
13596 enum, giving users an incomplete type when the definition is
13597 actually available. Note that we do not want to do this for all
13598 enums which are just declarations, because C++0x allows forward
13599 enum declarations. */
13600 if (cu
->per_cu
->is_debug_types
13601 && die_is_declaration (die
, cu
))
13603 struct signatured_type
*sig_type
;
13605 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13606 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13607 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13611 new_symbol (die
, this_type
, cu
);
13614 /* Extract all information from a DW_TAG_array_type DIE and put it in
13615 the DIE's type field. For now, this only handles one dimensional
13618 static struct type
*
13619 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13621 struct objfile
*objfile
= cu
->objfile
;
13622 struct die_info
*child_die
;
13624 struct type
*element_type
, *range_type
, *index_type
;
13625 struct type
**range_types
= NULL
;
13626 struct attribute
*attr
;
13628 struct cleanup
*back_to
;
13630 unsigned int bit_stride
= 0;
13632 element_type
= die_type (die
, cu
);
13634 /* The die_type call above may have already set the type for this DIE. */
13635 type
= get_die_type (die
, cu
);
13639 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13641 bit_stride
= DW_UNSND (attr
) * 8;
13643 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13645 bit_stride
= DW_UNSND (attr
);
13647 /* Irix 6.2 native cc creates array types without children for
13648 arrays with unspecified length. */
13649 if (die
->child
== NULL
)
13651 index_type
= objfile_type (objfile
)->builtin_int
;
13652 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13653 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13655 return set_die_type (die
, type
, cu
);
13658 back_to
= make_cleanup (null_cleanup
, NULL
);
13659 child_die
= die
->child
;
13660 while (child_die
&& child_die
->tag
)
13662 if (child_die
->tag
== DW_TAG_subrange_type
)
13664 struct type
*child_type
= read_type_die (child_die
, cu
);
13666 if (child_type
!= NULL
)
13668 /* The range type was succesfully read. Save it for the
13669 array type creation. */
13670 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13672 range_types
= (struct type
**)
13673 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13674 * sizeof (struct type
*));
13676 make_cleanup (free_current_contents
, &range_types
);
13678 range_types
[ndim
++] = child_type
;
13681 child_die
= sibling_die (child_die
);
13684 /* Dwarf2 dimensions are output from left to right, create the
13685 necessary array types in backwards order. */
13687 type
= element_type
;
13689 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13694 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13700 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13704 /* Understand Dwarf2 support for vector types (like they occur on
13705 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13706 array type. This is not part of the Dwarf2/3 standard yet, but a
13707 custom vendor extension. The main difference between a regular
13708 array and the vector variant is that vectors are passed by value
13710 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13712 make_vector_type (type
);
13714 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13715 implementation may choose to implement triple vectors using this
13717 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13720 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13721 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13723 complaint (&symfile_complaints
,
13724 _("DW_AT_byte_size for array type smaller "
13725 "than the total size of elements"));
13728 name
= dwarf2_name (die
, cu
);
13730 TYPE_NAME (type
) = name
;
13732 /* Install the type in the die. */
13733 set_die_type (die
, type
, cu
);
13735 /* set_die_type should be already done. */
13736 set_descriptive_type (type
, die
, cu
);
13738 do_cleanups (back_to
);
13743 static enum dwarf_array_dim_ordering
13744 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13746 struct attribute
*attr
;
13748 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13750 if (attr
) return DW_SND (attr
);
13752 /* GNU F77 is a special case, as at 08/2004 array type info is the
13753 opposite order to the dwarf2 specification, but data is still
13754 laid out as per normal fortran.
13756 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13757 version checking. */
13759 if (cu
->language
== language_fortran
13760 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13762 return DW_ORD_row_major
;
13765 switch (cu
->language_defn
->la_array_ordering
)
13767 case array_column_major
:
13768 return DW_ORD_col_major
;
13769 case array_row_major
:
13771 return DW_ORD_row_major
;
13775 /* Extract all information from a DW_TAG_set_type DIE and put it in
13776 the DIE's type field. */
13778 static struct type
*
13779 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13781 struct type
*domain_type
, *set_type
;
13782 struct attribute
*attr
;
13784 domain_type
= die_type (die
, cu
);
13786 /* The die_type call above may have already set the type for this DIE. */
13787 set_type
= get_die_type (die
, cu
);
13791 set_type
= create_set_type (NULL
, domain_type
);
13793 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13795 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13797 return set_die_type (die
, set_type
, cu
);
13800 /* A helper for read_common_block that creates a locexpr baton.
13801 SYM is the symbol which we are marking as computed.
13802 COMMON_DIE is the DIE for the common block.
13803 COMMON_LOC is the location expression attribute for the common
13805 MEMBER_LOC is the location expression attribute for the particular
13806 member of the common block that we are processing.
13807 CU is the CU from which the above come. */
13810 mark_common_block_symbol_computed (struct symbol
*sym
,
13811 struct die_info
*common_die
,
13812 struct attribute
*common_loc
,
13813 struct attribute
*member_loc
,
13814 struct dwarf2_cu
*cu
)
13816 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13817 struct dwarf2_locexpr_baton
*baton
;
13819 unsigned int cu_off
;
13820 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13821 LONGEST offset
= 0;
13823 gdb_assert (common_loc
&& member_loc
);
13824 gdb_assert (attr_form_is_block (common_loc
));
13825 gdb_assert (attr_form_is_block (member_loc
)
13826 || attr_form_is_constant (member_loc
));
13828 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13829 sizeof (struct dwarf2_locexpr_baton
));
13830 baton
->per_cu
= cu
->per_cu
;
13831 gdb_assert (baton
->per_cu
);
13833 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13835 if (attr_form_is_constant (member_loc
))
13837 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13838 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13841 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13843 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13846 *ptr
++ = DW_OP_call4
;
13847 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13848 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13851 if (attr_form_is_constant (member_loc
))
13853 *ptr
++ = DW_OP_addr
;
13854 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13855 ptr
+= cu
->header
.addr_size
;
13859 /* We have to copy the data here, because DW_OP_call4 will only
13860 use a DW_AT_location attribute. */
13861 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13862 ptr
+= DW_BLOCK (member_loc
)->size
;
13865 *ptr
++ = DW_OP_plus
;
13866 gdb_assert (ptr
- baton
->data
== baton
->size
);
13868 SYMBOL_LOCATION_BATON (sym
) = baton
;
13869 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13872 /* Create appropriate locally-scoped variables for all the
13873 DW_TAG_common_block entries. Also create a struct common_block
13874 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13875 is used to sepate the common blocks name namespace from regular
13879 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13881 struct attribute
*attr
;
13883 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13886 /* Support the .debug_loc offsets. */
13887 if (attr_form_is_block (attr
))
13891 else if (attr_form_is_section_offset (attr
))
13893 dwarf2_complex_location_expr_complaint ();
13898 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13899 "common block member");
13904 if (die
->child
!= NULL
)
13906 struct objfile
*objfile
= cu
->objfile
;
13907 struct die_info
*child_die
;
13908 size_t n_entries
= 0, size
;
13909 struct common_block
*common_block
;
13910 struct symbol
*sym
;
13912 for (child_die
= die
->child
;
13913 child_die
&& child_die
->tag
;
13914 child_die
= sibling_die (child_die
))
13917 size
= (sizeof (struct common_block
)
13918 + (n_entries
- 1) * sizeof (struct symbol
*));
13919 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
13920 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13921 common_block
->n_entries
= 0;
13923 for (child_die
= die
->child
;
13924 child_die
&& child_die
->tag
;
13925 child_die
= sibling_die (child_die
))
13927 /* Create the symbol in the DW_TAG_common_block block in the current
13929 sym
= new_symbol (child_die
, NULL
, cu
);
13932 struct attribute
*member_loc
;
13934 common_block
->contents
[common_block
->n_entries
++] = sym
;
13936 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
13940 /* GDB has handled this for a long time, but it is
13941 not specified by DWARF. It seems to have been
13942 emitted by gfortran at least as recently as:
13943 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13944 complaint (&symfile_complaints
,
13945 _("Variable in common block has "
13946 "DW_AT_data_member_location "
13947 "- DIE at 0x%x [in module %s]"),
13948 child_die
->offset
.sect_off
,
13949 objfile_name (cu
->objfile
));
13951 if (attr_form_is_section_offset (member_loc
))
13952 dwarf2_complex_location_expr_complaint ();
13953 else if (attr_form_is_constant (member_loc
)
13954 || attr_form_is_block (member_loc
))
13957 mark_common_block_symbol_computed (sym
, die
, attr
,
13961 dwarf2_complex_location_expr_complaint ();
13966 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
13967 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
13971 /* Create a type for a C++ namespace. */
13973 static struct type
*
13974 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13976 struct objfile
*objfile
= cu
->objfile
;
13977 const char *previous_prefix
, *name
;
13981 /* For extensions, reuse the type of the original namespace. */
13982 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
13984 struct die_info
*ext_die
;
13985 struct dwarf2_cu
*ext_cu
= cu
;
13987 ext_die
= dwarf2_extension (die
, &ext_cu
);
13988 type
= read_type_die (ext_die
, ext_cu
);
13990 /* EXT_CU may not be the same as CU.
13991 Ensure TYPE is recorded with CU in die_type_hash. */
13992 return set_die_type (die
, type
, cu
);
13995 name
= namespace_name (die
, &is_anonymous
, cu
);
13997 /* Now build the name of the current namespace. */
13999 previous_prefix
= determine_prefix (die
, cu
);
14000 if (previous_prefix
[0] != '\0')
14001 name
= typename_concat (&objfile
->objfile_obstack
,
14002 previous_prefix
, name
, 0, cu
);
14004 /* Create the type. */
14005 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
14007 TYPE_NAME (type
) = name
;
14008 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14010 return set_die_type (die
, type
, cu
);
14013 /* Read a C++ namespace. */
14016 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14018 struct objfile
*objfile
= cu
->objfile
;
14021 /* Add a symbol associated to this if we haven't seen the namespace
14022 before. Also, add a using directive if it's an anonymous
14025 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14029 type
= read_type_die (die
, cu
);
14030 new_symbol (die
, type
, cu
);
14032 namespace_name (die
, &is_anonymous
, cu
);
14035 const char *previous_prefix
= determine_prefix (die
, cu
);
14037 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
14038 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14042 if (die
->child
!= NULL
)
14044 struct die_info
*child_die
= die
->child
;
14046 while (child_die
&& child_die
->tag
)
14048 process_die (child_die
, cu
);
14049 child_die
= sibling_die (child_die
);
14054 /* Read a Fortran module as type. This DIE can be only a declaration used for
14055 imported module. Still we need that type as local Fortran "use ... only"
14056 declaration imports depend on the created type in determine_prefix. */
14058 static struct type
*
14059 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14061 struct objfile
*objfile
= cu
->objfile
;
14062 const char *module_name
;
14065 module_name
= dwarf2_name (die
, cu
);
14067 complaint (&symfile_complaints
,
14068 _("DW_TAG_module has no name, offset 0x%x"),
14069 die
->offset
.sect_off
);
14070 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14072 /* determine_prefix uses TYPE_TAG_NAME. */
14073 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14075 return set_die_type (die
, type
, cu
);
14078 /* Read a Fortran module. */
14081 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14083 struct die_info
*child_die
= die
->child
;
14086 type
= read_type_die (die
, cu
);
14087 new_symbol (die
, type
, cu
);
14089 while (child_die
&& child_die
->tag
)
14091 process_die (child_die
, cu
);
14092 child_die
= sibling_die (child_die
);
14096 /* Return the name of the namespace represented by DIE. Set
14097 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14100 static const char *
14101 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14103 struct die_info
*current_die
;
14104 const char *name
= NULL
;
14106 /* Loop through the extensions until we find a name. */
14108 for (current_die
= die
;
14109 current_die
!= NULL
;
14110 current_die
= dwarf2_extension (die
, &cu
))
14112 name
= dwarf2_name (current_die
, cu
);
14117 /* Is it an anonymous namespace? */
14119 *is_anonymous
= (name
== NULL
);
14121 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14126 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14127 the user defined type vector. */
14129 static struct type
*
14130 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14132 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14133 struct comp_unit_head
*cu_header
= &cu
->header
;
14135 struct attribute
*attr_byte_size
;
14136 struct attribute
*attr_address_class
;
14137 int byte_size
, addr_class
;
14138 struct type
*target_type
;
14140 target_type
= die_type (die
, cu
);
14142 /* The die_type call above may have already set the type for this DIE. */
14143 type
= get_die_type (die
, cu
);
14147 type
= lookup_pointer_type (target_type
);
14149 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14150 if (attr_byte_size
)
14151 byte_size
= DW_UNSND (attr_byte_size
);
14153 byte_size
= cu_header
->addr_size
;
14155 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14156 if (attr_address_class
)
14157 addr_class
= DW_UNSND (attr_address_class
);
14159 addr_class
= DW_ADDR_none
;
14161 /* If the pointer size or address class is different than the
14162 default, create a type variant marked as such and set the
14163 length accordingly. */
14164 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14166 if (gdbarch_address_class_type_flags_p (gdbarch
))
14170 type_flags
= gdbarch_address_class_type_flags
14171 (gdbarch
, byte_size
, addr_class
);
14172 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14174 type
= make_type_with_address_space (type
, type_flags
);
14176 else if (TYPE_LENGTH (type
) != byte_size
)
14178 complaint (&symfile_complaints
,
14179 _("invalid pointer size %d"), byte_size
);
14183 /* Should we also complain about unhandled address classes? */
14187 TYPE_LENGTH (type
) = byte_size
;
14188 return set_die_type (die
, type
, cu
);
14191 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14192 the user defined type vector. */
14194 static struct type
*
14195 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14198 struct type
*to_type
;
14199 struct type
*domain
;
14201 to_type
= die_type (die
, cu
);
14202 domain
= die_containing_type (die
, cu
);
14204 /* The calls above may have already set the type for this DIE. */
14205 type
= get_die_type (die
, cu
);
14209 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14210 type
= lookup_methodptr_type (to_type
);
14211 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14213 struct type
*new_type
= alloc_type (cu
->objfile
);
14215 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14216 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14217 TYPE_VARARGS (to_type
));
14218 type
= lookup_methodptr_type (new_type
);
14221 type
= lookup_memberptr_type (to_type
, domain
);
14223 return set_die_type (die
, type
, cu
);
14226 /* Extract all information from a DW_TAG_reference_type DIE and add to
14227 the user defined type vector. */
14229 static struct type
*
14230 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14232 struct comp_unit_head
*cu_header
= &cu
->header
;
14233 struct type
*type
, *target_type
;
14234 struct attribute
*attr
;
14236 target_type
= die_type (die
, cu
);
14238 /* The die_type call above may have already set the type for this DIE. */
14239 type
= get_die_type (die
, cu
);
14243 type
= lookup_reference_type (target_type
);
14244 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14247 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14251 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14253 return set_die_type (die
, type
, cu
);
14256 /* Add the given cv-qualifiers to the element type of the array. GCC
14257 outputs DWARF type qualifiers that apply to an array, not the
14258 element type. But GDB relies on the array element type to carry
14259 the cv-qualifiers. This mimics section 6.7.3 of the C99
14262 static struct type
*
14263 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14264 struct type
*base_type
, int cnst
, int voltl
)
14266 struct type
*el_type
, *inner_array
;
14268 base_type
= copy_type (base_type
);
14269 inner_array
= base_type
;
14271 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14273 TYPE_TARGET_TYPE (inner_array
) =
14274 copy_type (TYPE_TARGET_TYPE (inner_array
));
14275 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14278 el_type
= TYPE_TARGET_TYPE (inner_array
);
14279 cnst
|= TYPE_CONST (el_type
);
14280 voltl
|= TYPE_VOLATILE (el_type
);
14281 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14283 return set_die_type (die
, base_type
, cu
);
14286 static struct type
*
14287 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14289 struct type
*base_type
, *cv_type
;
14291 base_type
= die_type (die
, cu
);
14293 /* The die_type call above may have already set the type for this DIE. */
14294 cv_type
= get_die_type (die
, cu
);
14298 /* In case the const qualifier is applied to an array type, the element type
14299 is so qualified, not the array type (section 6.7.3 of C99). */
14300 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14301 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14303 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14304 return set_die_type (die
, cv_type
, cu
);
14307 static struct type
*
14308 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14310 struct type
*base_type
, *cv_type
;
14312 base_type
= die_type (die
, cu
);
14314 /* The die_type call above may have already set the type for this DIE. */
14315 cv_type
= get_die_type (die
, cu
);
14319 /* In case the volatile qualifier is applied to an array type, the
14320 element type is so qualified, not the array type (section 6.7.3
14322 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14323 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14325 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14326 return set_die_type (die
, cv_type
, cu
);
14329 /* Handle DW_TAG_restrict_type. */
14331 static struct type
*
14332 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14334 struct type
*base_type
, *cv_type
;
14336 base_type
= die_type (die
, cu
);
14338 /* The die_type call above may have already set the type for this DIE. */
14339 cv_type
= get_die_type (die
, cu
);
14343 cv_type
= make_restrict_type (base_type
);
14344 return set_die_type (die
, cv_type
, cu
);
14347 /* Handle DW_TAG_atomic_type. */
14349 static struct type
*
14350 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14352 struct type
*base_type
, *cv_type
;
14354 base_type
= die_type (die
, cu
);
14356 /* The die_type call above may have already set the type for this DIE. */
14357 cv_type
= get_die_type (die
, cu
);
14361 cv_type
= make_atomic_type (base_type
);
14362 return set_die_type (die
, cv_type
, cu
);
14365 /* Extract all information from a DW_TAG_string_type DIE and add to
14366 the user defined type vector. It isn't really a user defined type,
14367 but it behaves like one, with other DIE's using an AT_user_def_type
14368 attribute to reference it. */
14370 static struct type
*
14371 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14373 struct objfile
*objfile
= cu
->objfile
;
14374 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14375 struct type
*type
, *range_type
, *index_type
, *char_type
;
14376 struct attribute
*attr
;
14377 unsigned int length
;
14379 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14382 length
= DW_UNSND (attr
);
14386 /* Check for the DW_AT_byte_size attribute. */
14387 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14390 length
= DW_UNSND (attr
);
14398 index_type
= objfile_type (objfile
)->builtin_int
;
14399 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14400 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14401 type
= create_string_type (NULL
, char_type
, range_type
);
14403 return set_die_type (die
, type
, cu
);
14406 /* Assuming that DIE corresponds to a function, returns nonzero
14407 if the function is prototyped. */
14410 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14412 struct attribute
*attr
;
14414 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14415 if (attr
&& (DW_UNSND (attr
) != 0))
14418 /* The DWARF standard implies that the DW_AT_prototyped attribute
14419 is only meaninful for C, but the concept also extends to other
14420 languages that allow unprototyped functions (Eg: Objective C).
14421 For all other languages, assume that functions are always
14423 if (cu
->language
!= language_c
14424 && cu
->language
!= language_objc
14425 && cu
->language
!= language_opencl
)
14428 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14429 prototyped and unprototyped functions; default to prototyped,
14430 since that is more common in modern code (and RealView warns
14431 about unprototyped functions). */
14432 if (producer_is_realview (cu
->producer
))
14438 /* Handle DIES due to C code like:
14442 int (*funcp)(int a, long l);
14446 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14448 static struct type
*
14449 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14451 struct objfile
*objfile
= cu
->objfile
;
14452 struct type
*type
; /* Type that this function returns. */
14453 struct type
*ftype
; /* Function that returns above type. */
14454 struct attribute
*attr
;
14456 type
= die_type (die
, cu
);
14458 /* The die_type call above may have already set the type for this DIE. */
14459 ftype
= get_die_type (die
, cu
);
14463 ftype
= lookup_function_type (type
);
14465 if (prototyped_function_p (die
, cu
))
14466 TYPE_PROTOTYPED (ftype
) = 1;
14468 /* Store the calling convention in the type if it's available in
14469 the subroutine die. Otherwise set the calling convention to
14470 the default value DW_CC_normal. */
14471 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14473 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14474 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14475 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14477 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14479 /* Record whether the function returns normally to its caller or not
14480 if the DWARF producer set that information. */
14481 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14482 if (attr
&& (DW_UNSND (attr
) != 0))
14483 TYPE_NO_RETURN (ftype
) = 1;
14485 /* We need to add the subroutine type to the die immediately so
14486 we don't infinitely recurse when dealing with parameters
14487 declared as the same subroutine type. */
14488 set_die_type (die
, ftype
, cu
);
14490 if (die
->child
!= NULL
)
14492 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14493 struct die_info
*child_die
;
14494 int nparams
, iparams
;
14496 /* Count the number of parameters.
14497 FIXME: GDB currently ignores vararg functions, but knows about
14498 vararg member functions. */
14500 child_die
= die
->child
;
14501 while (child_die
&& child_die
->tag
)
14503 if (child_die
->tag
== DW_TAG_formal_parameter
)
14505 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14506 TYPE_VARARGS (ftype
) = 1;
14507 child_die
= sibling_die (child_die
);
14510 /* Allocate storage for parameters and fill them in. */
14511 TYPE_NFIELDS (ftype
) = nparams
;
14512 TYPE_FIELDS (ftype
) = (struct field
*)
14513 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14515 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14516 even if we error out during the parameters reading below. */
14517 for (iparams
= 0; iparams
< nparams
; iparams
++)
14518 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14521 child_die
= die
->child
;
14522 while (child_die
&& child_die
->tag
)
14524 if (child_die
->tag
== DW_TAG_formal_parameter
)
14526 struct type
*arg_type
;
14528 /* DWARF version 2 has no clean way to discern C++
14529 static and non-static member functions. G++ helps
14530 GDB by marking the first parameter for non-static
14531 member functions (which is the this pointer) as
14532 artificial. We pass this information to
14533 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14535 DWARF version 3 added DW_AT_object_pointer, which GCC
14536 4.5 does not yet generate. */
14537 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14539 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14542 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14544 /* GCC/43521: In java, the formal parameter
14545 "this" is sometimes not marked with DW_AT_artificial. */
14546 if (cu
->language
== language_java
)
14548 const char *name
= dwarf2_name (child_die
, cu
);
14550 if (name
&& !strcmp (name
, "this"))
14551 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14554 arg_type
= die_type (child_die
, cu
);
14556 /* RealView does not mark THIS as const, which the testsuite
14557 expects. GCC marks THIS as const in method definitions,
14558 but not in the class specifications (GCC PR 43053). */
14559 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14560 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14563 struct dwarf2_cu
*arg_cu
= cu
;
14564 const char *name
= dwarf2_name (child_die
, cu
);
14566 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14569 /* If the compiler emits this, use it. */
14570 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14573 else if (name
&& strcmp (name
, "this") == 0)
14574 /* Function definitions will have the argument names. */
14576 else if (name
== NULL
&& iparams
== 0)
14577 /* Declarations may not have the names, so like
14578 elsewhere in GDB, assume an artificial first
14579 argument is "this". */
14583 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14587 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14590 child_die
= sibling_die (child_die
);
14597 static struct type
*
14598 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14600 struct objfile
*objfile
= cu
->objfile
;
14601 const char *name
= NULL
;
14602 struct type
*this_type
, *target_type
;
14604 name
= dwarf2_full_name (NULL
, die
, cu
);
14605 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14606 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14607 TYPE_NAME (this_type
) = name
;
14608 set_die_type (die
, this_type
, cu
);
14609 target_type
= die_type (die
, cu
);
14610 if (target_type
!= this_type
)
14611 TYPE_TARGET_TYPE (this_type
) = target_type
;
14614 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14615 spec and cause infinite loops in GDB. */
14616 complaint (&symfile_complaints
,
14617 _("Self-referential DW_TAG_typedef "
14618 "- DIE at 0x%x [in module %s]"),
14619 die
->offset
.sect_off
, objfile_name (objfile
));
14620 TYPE_TARGET_TYPE (this_type
) = NULL
;
14625 /* Find a representation of a given base type and install
14626 it in the TYPE field of the die. */
14628 static struct type
*
14629 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14631 struct objfile
*objfile
= cu
->objfile
;
14633 struct attribute
*attr
;
14634 int encoding
= 0, size
= 0;
14636 enum type_code code
= TYPE_CODE_INT
;
14637 int type_flags
= 0;
14638 struct type
*target_type
= NULL
;
14640 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14643 encoding
= DW_UNSND (attr
);
14645 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14648 size
= DW_UNSND (attr
);
14650 name
= dwarf2_name (die
, cu
);
14653 complaint (&symfile_complaints
,
14654 _("DW_AT_name missing from DW_TAG_base_type"));
14659 case DW_ATE_address
:
14660 /* Turn DW_ATE_address into a void * pointer. */
14661 code
= TYPE_CODE_PTR
;
14662 type_flags
|= TYPE_FLAG_UNSIGNED
;
14663 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14665 case DW_ATE_boolean
:
14666 code
= TYPE_CODE_BOOL
;
14667 type_flags
|= TYPE_FLAG_UNSIGNED
;
14669 case DW_ATE_complex_float
:
14670 code
= TYPE_CODE_COMPLEX
;
14671 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14673 case DW_ATE_decimal_float
:
14674 code
= TYPE_CODE_DECFLOAT
;
14677 code
= TYPE_CODE_FLT
;
14679 case DW_ATE_signed
:
14681 case DW_ATE_unsigned
:
14682 type_flags
|= TYPE_FLAG_UNSIGNED
;
14683 if (cu
->language
== language_fortran
14685 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
14686 code
= TYPE_CODE_CHAR
;
14688 case DW_ATE_signed_char
:
14689 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14690 || cu
->language
== language_pascal
14691 || cu
->language
== language_fortran
)
14692 code
= TYPE_CODE_CHAR
;
14694 case DW_ATE_unsigned_char
:
14695 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14696 || cu
->language
== language_pascal
14697 || cu
->language
== language_fortran
)
14698 code
= TYPE_CODE_CHAR
;
14699 type_flags
|= TYPE_FLAG_UNSIGNED
;
14702 /* We just treat this as an integer and then recognize the
14703 type by name elsewhere. */
14707 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14708 dwarf_type_encoding_name (encoding
));
14712 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14713 TYPE_NAME (type
) = name
;
14714 TYPE_TARGET_TYPE (type
) = target_type
;
14716 if (name
&& strcmp (name
, "char") == 0)
14717 TYPE_NOSIGN (type
) = 1;
14719 return set_die_type (die
, type
, cu
);
14722 /* Parse dwarf attribute if it's a block, reference or constant and put the
14723 resulting value of the attribute into struct bound_prop.
14724 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14727 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14728 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14730 struct dwarf2_property_baton
*baton
;
14731 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14733 if (attr
== NULL
|| prop
== NULL
)
14736 if (attr_form_is_block (attr
))
14738 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14739 baton
->referenced_type
= NULL
;
14740 baton
->locexpr
.per_cu
= cu
->per_cu
;
14741 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14742 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14743 prop
->data
.baton
= baton
;
14744 prop
->kind
= PROP_LOCEXPR
;
14745 gdb_assert (prop
->data
.baton
!= NULL
);
14747 else if (attr_form_is_ref (attr
))
14749 struct dwarf2_cu
*target_cu
= cu
;
14750 struct die_info
*target_die
;
14751 struct attribute
*target_attr
;
14753 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14754 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14755 if (target_attr
== NULL
)
14756 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14758 if (target_attr
== NULL
)
14761 switch (target_attr
->name
)
14763 case DW_AT_location
:
14764 if (attr_form_is_section_offset (target_attr
))
14766 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14767 baton
->referenced_type
= die_type (target_die
, target_cu
);
14768 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14769 prop
->data
.baton
= baton
;
14770 prop
->kind
= PROP_LOCLIST
;
14771 gdb_assert (prop
->data
.baton
!= NULL
);
14773 else if (attr_form_is_block (target_attr
))
14775 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14776 baton
->referenced_type
= die_type (target_die
, target_cu
);
14777 baton
->locexpr
.per_cu
= cu
->per_cu
;
14778 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14779 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14780 prop
->data
.baton
= baton
;
14781 prop
->kind
= PROP_LOCEXPR
;
14782 gdb_assert (prop
->data
.baton
!= NULL
);
14786 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14787 "dynamic property");
14791 case DW_AT_data_member_location
:
14795 if (!handle_data_member_location (target_die
, target_cu
,
14799 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14800 baton
->referenced_type
= get_die_type (target_die
->parent
,
14802 baton
->offset_info
.offset
= offset
;
14803 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14804 prop
->data
.baton
= baton
;
14805 prop
->kind
= PROP_ADDR_OFFSET
;
14810 else if (attr_form_is_constant (attr
))
14812 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14813 prop
->kind
= PROP_CONST
;
14817 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14818 dwarf2_name (die
, cu
));
14825 /* Read the given DW_AT_subrange DIE. */
14827 static struct type
*
14828 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14830 struct type
*base_type
, *orig_base_type
;
14831 struct type
*range_type
;
14832 struct attribute
*attr
;
14833 struct dynamic_prop low
, high
;
14834 int low_default_is_valid
;
14835 int high_bound_is_count
= 0;
14837 LONGEST negative_mask
;
14839 orig_base_type
= die_type (die
, cu
);
14840 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14841 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14842 creating the range type, but we use the result of check_typedef
14843 when examining properties of the type. */
14844 base_type
= check_typedef (orig_base_type
);
14846 /* The die_type call above may have already set the type for this DIE. */
14847 range_type
= get_die_type (die
, cu
);
14851 low
.kind
= PROP_CONST
;
14852 high
.kind
= PROP_CONST
;
14853 high
.data
.const_val
= 0;
14855 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14856 omitting DW_AT_lower_bound. */
14857 switch (cu
->language
)
14860 case language_cplus
:
14861 low
.data
.const_val
= 0;
14862 low_default_is_valid
= 1;
14864 case language_fortran
:
14865 low
.data
.const_val
= 1;
14866 low_default_is_valid
= 1;
14869 case language_java
:
14870 case language_objc
:
14871 low
.data
.const_val
= 0;
14872 low_default_is_valid
= (cu
->header
.version
>= 4);
14876 case language_pascal
:
14877 low
.data
.const_val
= 1;
14878 low_default_is_valid
= (cu
->header
.version
>= 4);
14881 low
.data
.const_val
= 0;
14882 low_default_is_valid
= 0;
14886 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14888 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14889 else if (!low_default_is_valid
)
14890 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14891 "- DIE at 0x%x [in module %s]"),
14892 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14894 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14895 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14897 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14898 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14900 /* If bounds are constant do the final calculation here. */
14901 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14902 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14904 high_bound_is_count
= 1;
14908 /* Dwarf-2 specifications explicitly allows to create subrange types
14909 without specifying a base type.
14910 In that case, the base type must be set to the type of
14911 the lower bound, upper bound or count, in that order, if any of these
14912 three attributes references an object that has a type.
14913 If no base type is found, the Dwarf-2 specifications say that
14914 a signed integer type of size equal to the size of an address should
14916 For the following C code: `extern char gdb_int [];'
14917 GCC produces an empty range DIE.
14918 FIXME: muller/2010-05-28: Possible references to object for low bound,
14919 high bound or count are not yet handled by this code. */
14920 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14922 struct objfile
*objfile
= cu
->objfile
;
14923 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14924 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
14925 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
14927 /* Test "int", "long int", and "long long int" objfile types,
14928 and select the first one having a size above or equal to the
14929 architecture address size. */
14930 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14931 base_type
= int_type
;
14934 int_type
= objfile_type (objfile
)->builtin_long
;
14935 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14936 base_type
= int_type
;
14939 int_type
= objfile_type (objfile
)->builtin_long_long
;
14940 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14941 base_type
= int_type
;
14946 /* Normally, the DWARF producers are expected to use a signed
14947 constant form (Eg. DW_FORM_sdata) to express negative bounds.
14948 But this is unfortunately not always the case, as witnessed
14949 with GCC, for instance, where the ambiguous DW_FORM_dataN form
14950 is used instead. To work around that ambiguity, we treat
14951 the bounds as signed, and thus sign-extend their values, when
14952 the base type is signed. */
14954 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
14955 if (low
.kind
== PROP_CONST
14956 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
14957 low
.data
.const_val
|= negative_mask
;
14958 if (high
.kind
== PROP_CONST
14959 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
14960 high
.data
.const_val
|= negative_mask
;
14962 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
14964 if (high_bound_is_count
)
14965 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
14967 /* Ada expects an empty array on no boundary attributes. */
14968 if (attr
== NULL
&& cu
->language
!= language_ada
)
14969 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
14971 name
= dwarf2_name (die
, cu
);
14973 TYPE_NAME (range_type
) = name
;
14975 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14977 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
14979 set_die_type (die
, range_type
, cu
);
14981 /* set_die_type should be already done. */
14982 set_descriptive_type (range_type
, die
, cu
);
14987 static struct type
*
14988 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14992 /* For now, we only support the C meaning of an unspecified type: void. */
14994 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
14995 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
14997 return set_die_type (die
, type
, cu
);
15000 /* Read a single die and all its descendents. Set the die's sibling
15001 field to NULL; set other fields in the die correctly, and set all
15002 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15003 location of the info_ptr after reading all of those dies. PARENT
15004 is the parent of the die in question. */
15006 static struct die_info
*
15007 read_die_and_children (const struct die_reader_specs
*reader
,
15008 const gdb_byte
*info_ptr
,
15009 const gdb_byte
**new_info_ptr
,
15010 struct die_info
*parent
)
15012 struct die_info
*die
;
15013 const gdb_byte
*cur_ptr
;
15016 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15019 *new_info_ptr
= cur_ptr
;
15022 store_in_ref_table (die
, reader
->cu
);
15025 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15029 *new_info_ptr
= cur_ptr
;
15032 die
->sibling
= NULL
;
15033 die
->parent
= parent
;
15037 /* Read a die, all of its descendents, and all of its siblings; set
15038 all of the fields of all of the dies correctly. Arguments are as
15039 in read_die_and_children. */
15041 static struct die_info
*
15042 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15043 const gdb_byte
*info_ptr
,
15044 const gdb_byte
**new_info_ptr
,
15045 struct die_info
*parent
)
15047 struct die_info
*first_die
, *last_sibling
;
15048 const gdb_byte
*cur_ptr
;
15050 cur_ptr
= info_ptr
;
15051 first_die
= last_sibling
= NULL
;
15055 struct die_info
*die
15056 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15060 *new_info_ptr
= cur_ptr
;
15067 last_sibling
->sibling
= die
;
15069 last_sibling
= die
;
15073 /* Read a die, all of its descendents, and all of its siblings; set
15074 all of the fields of all of the dies correctly. Arguments are as
15075 in read_die_and_children.
15076 This the main entry point for reading a DIE and all its children. */
15078 static struct die_info
*
15079 read_die_and_siblings (const struct die_reader_specs
*reader
,
15080 const gdb_byte
*info_ptr
,
15081 const gdb_byte
**new_info_ptr
,
15082 struct die_info
*parent
)
15084 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15085 new_info_ptr
, parent
);
15087 if (dwarf2_die_debug
)
15089 fprintf_unfiltered (gdb_stdlog
,
15090 "Read die from %s@0x%x of %s:\n",
15091 get_section_name (reader
->die_section
),
15092 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15093 bfd_get_filename (reader
->abfd
));
15094 dump_die (die
, dwarf2_die_debug
);
15100 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15102 The caller is responsible for filling in the extra attributes
15103 and updating (*DIEP)->num_attrs.
15104 Set DIEP to point to a newly allocated die with its information,
15105 except for its child, sibling, and parent fields.
15106 Set HAS_CHILDREN to tell whether the die has children or not. */
15108 static const gdb_byte
*
15109 read_full_die_1 (const struct die_reader_specs
*reader
,
15110 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15111 int *has_children
, int num_extra_attrs
)
15113 unsigned int abbrev_number
, bytes_read
, i
;
15114 sect_offset offset
;
15115 struct abbrev_info
*abbrev
;
15116 struct die_info
*die
;
15117 struct dwarf2_cu
*cu
= reader
->cu
;
15118 bfd
*abfd
= reader
->abfd
;
15120 offset
.sect_off
= info_ptr
- reader
->buffer
;
15121 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15122 info_ptr
+= bytes_read
;
15123 if (!abbrev_number
)
15130 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15132 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15134 bfd_get_filename (abfd
));
15136 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15137 die
->offset
= offset
;
15138 die
->tag
= abbrev
->tag
;
15139 die
->abbrev
= abbrev_number
;
15141 /* Make the result usable.
15142 The caller needs to update num_attrs after adding the extra
15144 die
->num_attrs
= abbrev
->num_attrs
;
15146 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15147 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15151 *has_children
= abbrev
->has_children
;
15155 /* Read a die and all its attributes.
15156 Set DIEP to point to a newly allocated die with its information,
15157 except for its child, sibling, and parent fields.
15158 Set HAS_CHILDREN to tell whether the die has children or not. */
15160 static const gdb_byte
*
15161 read_full_die (const struct die_reader_specs
*reader
,
15162 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15165 const gdb_byte
*result
;
15167 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15169 if (dwarf2_die_debug
)
15171 fprintf_unfiltered (gdb_stdlog
,
15172 "Read die from %s@0x%x of %s:\n",
15173 get_section_name (reader
->die_section
),
15174 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15175 bfd_get_filename (reader
->abfd
));
15176 dump_die (*diep
, dwarf2_die_debug
);
15182 /* Abbreviation tables.
15184 In DWARF version 2, the description of the debugging information is
15185 stored in a separate .debug_abbrev section. Before we read any
15186 dies from a section we read in all abbreviations and install them
15187 in a hash table. */
15189 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15191 static struct abbrev_info
*
15192 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15194 struct abbrev_info
*abbrev
;
15196 abbrev
= (struct abbrev_info
*)
15197 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
15198 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15202 /* Add an abbreviation to the table. */
15205 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15206 unsigned int abbrev_number
,
15207 struct abbrev_info
*abbrev
)
15209 unsigned int hash_number
;
15211 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15212 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15213 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15216 /* Look up an abbrev in the table.
15217 Returns NULL if the abbrev is not found. */
15219 static struct abbrev_info
*
15220 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15221 unsigned int abbrev_number
)
15223 unsigned int hash_number
;
15224 struct abbrev_info
*abbrev
;
15226 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15227 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15231 if (abbrev
->number
== abbrev_number
)
15233 abbrev
= abbrev
->next
;
15238 /* Read in an abbrev table. */
15240 static struct abbrev_table
*
15241 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15242 sect_offset offset
)
15244 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15245 bfd
*abfd
= get_section_bfd_owner (section
);
15246 struct abbrev_table
*abbrev_table
;
15247 const gdb_byte
*abbrev_ptr
;
15248 struct abbrev_info
*cur_abbrev
;
15249 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15250 unsigned int abbrev_form
;
15251 struct attr_abbrev
*cur_attrs
;
15252 unsigned int allocated_attrs
;
15254 abbrev_table
= XNEW (struct abbrev_table
);
15255 abbrev_table
->offset
= offset
;
15256 obstack_init (&abbrev_table
->abbrev_obstack
);
15257 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15259 * sizeof (struct abbrev_info
*)));
15260 memset (abbrev_table
->abbrevs
, 0,
15261 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15263 dwarf2_read_section (objfile
, section
);
15264 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15265 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15266 abbrev_ptr
+= bytes_read
;
15268 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15269 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
15271 /* Loop until we reach an abbrev number of 0. */
15272 while (abbrev_number
)
15274 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15276 /* read in abbrev header */
15277 cur_abbrev
->number
= abbrev_number
;
15278 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15279 abbrev_ptr
+= bytes_read
;
15280 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15283 /* now read in declarations */
15284 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15285 abbrev_ptr
+= bytes_read
;
15286 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15287 abbrev_ptr
+= bytes_read
;
15288 while (abbrev_name
)
15290 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15292 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15294 = xrealloc (cur_attrs
, (allocated_attrs
15295 * sizeof (struct attr_abbrev
)));
15298 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
15299 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
15300 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15301 abbrev_ptr
+= bytes_read
;
15302 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15303 abbrev_ptr
+= bytes_read
;
15306 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15307 (cur_abbrev
->num_attrs
15308 * sizeof (struct attr_abbrev
)));
15309 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15310 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15312 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15314 /* Get next abbreviation.
15315 Under Irix6 the abbreviations for a compilation unit are not
15316 always properly terminated with an abbrev number of 0.
15317 Exit loop if we encounter an abbreviation which we have
15318 already read (which means we are about to read the abbreviations
15319 for the next compile unit) or if the end of the abbreviation
15320 table is reached. */
15321 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15323 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15324 abbrev_ptr
+= bytes_read
;
15325 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15330 return abbrev_table
;
15333 /* Free the resources held by ABBREV_TABLE. */
15336 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15338 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15339 xfree (abbrev_table
);
15342 /* Same as abbrev_table_free but as a cleanup.
15343 We pass in a pointer to the pointer to the table so that we can
15344 set the pointer to NULL when we're done. It also simplifies
15345 build_type_psymtabs_1. */
15348 abbrev_table_free_cleanup (void *table_ptr
)
15350 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15352 if (*abbrev_table_ptr
!= NULL
)
15353 abbrev_table_free (*abbrev_table_ptr
);
15354 *abbrev_table_ptr
= NULL
;
15357 /* Read the abbrev table for CU from ABBREV_SECTION. */
15360 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15361 struct dwarf2_section_info
*abbrev_section
)
15364 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15367 /* Release the memory used by the abbrev table for a compilation unit. */
15370 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15372 struct dwarf2_cu
*cu
= ptr_to_cu
;
15374 if (cu
->abbrev_table
!= NULL
)
15375 abbrev_table_free (cu
->abbrev_table
);
15376 /* Set this to NULL so that we SEGV if we try to read it later,
15377 and also because free_comp_unit verifies this is NULL. */
15378 cu
->abbrev_table
= NULL
;
15381 /* Returns nonzero if TAG represents a type that we might generate a partial
15385 is_type_tag_for_partial (int tag
)
15390 /* Some types that would be reasonable to generate partial symbols for,
15391 that we don't at present. */
15392 case DW_TAG_array_type
:
15393 case DW_TAG_file_type
:
15394 case DW_TAG_ptr_to_member_type
:
15395 case DW_TAG_set_type
:
15396 case DW_TAG_string_type
:
15397 case DW_TAG_subroutine_type
:
15399 case DW_TAG_base_type
:
15400 case DW_TAG_class_type
:
15401 case DW_TAG_interface_type
:
15402 case DW_TAG_enumeration_type
:
15403 case DW_TAG_structure_type
:
15404 case DW_TAG_subrange_type
:
15405 case DW_TAG_typedef
:
15406 case DW_TAG_union_type
:
15413 /* Load all DIEs that are interesting for partial symbols into memory. */
15415 static struct partial_die_info
*
15416 load_partial_dies (const struct die_reader_specs
*reader
,
15417 const gdb_byte
*info_ptr
, int building_psymtab
)
15419 struct dwarf2_cu
*cu
= reader
->cu
;
15420 struct objfile
*objfile
= cu
->objfile
;
15421 struct partial_die_info
*part_die
;
15422 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15423 struct abbrev_info
*abbrev
;
15424 unsigned int bytes_read
;
15425 unsigned int load_all
= 0;
15426 int nesting_level
= 1;
15431 gdb_assert (cu
->per_cu
!= NULL
);
15432 if (cu
->per_cu
->load_all_dies
)
15436 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15440 &cu
->comp_unit_obstack
,
15441 hashtab_obstack_allocate
,
15442 dummy_obstack_deallocate
);
15444 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15445 sizeof (struct partial_die_info
));
15449 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15451 /* A NULL abbrev means the end of a series of children. */
15452 if (abbrev
== NULL
)
15454 if (--nesting_level
== 0)
15456 /* PART_DIE was probably the last thing allocated on the
15457 comp_unit_obstack, so we could call obstack_free
15458 here. We don't do that because the waste is small,
15459 and will be cleaned up when we're done with this
15460 compilation unit. This way, we're also more robust
15461 against other users of the comp_unit_obstack. */
15464 info_ptr
+= bytes_read
;
15465 last_die
= parent_die
;
15466 parent_die
= parent_die
->die_parent
;
15470 /* Check for template arguments. We never save these; if
15471 they're seen, we just mark the parent, and go on our way. */
15472 if (parent_die
!= NULL
15473 && cu
->language
== language_cplus
15474 && (abbrev
->tag
== DW_TAG_template_type_param
15475 || abbrev
->tag
== DW_TAG_template_value_param
))
15477 parent_die
->has_template_arguments
= 1;
15481 /* We don't need a partial DIE for the template argument. */
15482 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15487 /* We only recurse into c++ subprograms looking for template arguments.
15488 Skip their other children. */
15490 && cu
->language
== language_cplus
15491 && parent_die
!= NULL
15492 && parent_die
->tag
== DW_TAG_subprogram
)
15494 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15498 /* Check whether this DIE is interesting enough to save. Normally
15499 we would not be interested in members here, but there may be
15500 later variables referencing them via DW_AT_specification (for
15501 static members). */
15503 && !is_type_tag_for_partial (abbrev
->tag
)
15504 && abbrev
->tag
!= DW_TAG_constant
15505 && abbrev
->tag
!= DW_TAG_enumerator
15506 && abbrev
->tag
!= DW_TAG_subprogram
15507 && abbrev
->tag
!= DW_TAG_lexical_block
15508 && abbrev
->tag
!= DW_TAG_variable
15509 && abbrev
->tag
!= DW_TAG_namespace
15510 && abbrev
->tag
!= DW_TAG_module
15511 && abbrev
->tag
!= DW_TAG_member
15512 && abbrev
->tag
!= DW_TAG_imported_unit
15513 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15515 /* Otherwise we skip to the next sibling, if any. */
15516 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15520 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15523 /* This two-pass algorithm for processing partial symbols has a
15524 high cost in cache pressure. Thus, handle some simple cases
15525 here which cover the majority of C partial symbols. DIEs
15526 which neither have specification tags in them, nor could have
15527 specification tags elsewhere pointing at them, can simply be
15528 processed and discarded.
15530 This segment is also optional; scan_partial_symbols and
15531 add_partial_symbol will handle these DIEs if we chain
15532 them in normally. When compilers which do not emit large
15533 quantities of duplicate debug information are more common,
15534 this code can probably be removed. */
15536 /* Any complete simple types at the top level (pretty much all
15537 of them, for a language without namespaces), can be processed
15539 if (parent_die
== NULL
15540 && part_die
->has_specification
== 0
15541 && part_die
->is_declaration
== 0
15542 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15543 || part_die
->tag
== DW_TAG_base_type
15544 || part_die
->tag
== DW_TAG_subrange_type
))
15546 if (building_psymtab
&& part_die
->name
!= NULL
)
15547 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15548 VAR_DOMAIN
, LOC_TYPEDEF
,
15549 &objfile
->static_psymbols
,
15550 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15551 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15555 /* The exception for DW_TAG_typedef with has_children above is
15556 a workaround of GCC PR debug/47510. In the case of this complaint
15557 type_name_no_tag_or_error will error on such types later.
15559 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15560 it could not find the child DIEs referenced later, this is checked
15561 above. In correct DWARF DW_TAG_typedef should have no children. */
15563 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15564 complaint (&symfile_complaints
,
15565 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15566 "- DIE at 0x%x [in module %s]"),
15567 part_die
->offset
.sect_off
, objfile_name (objfile
));
15569 /* If we're at the second level, and we're an enumerator, and
15570 our parent has no specification (meaning possibly lives in a
15571 namespace elsewhere), then we can add the partial symbol now
15572 instead of queueing it. */
15573 if (part_die
->tag
== DW_TAG_enumerator
15574 && parent_die
!= NULL
15575 && parent_die
->die_parent
== NULL
15576 && parent_die
->tag
== DW_TAG_enumeration_type
15577 && parent_die
->has_specification
== 0)
15579 if (part_die
->name
== NULL
)
15580 complaint (&symfile_complaints
,
15581 _("malformed enumerator DIE ignored"));
15582 else if (building_psymtab
)
15583 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15584 VAR_DOMAIN
, LOC_CONST
,
15585 (cu
->language
== language_cplus
15586 || cu
->language
== language_java
)
15587 ? &objfile
->global_psymbols
15588 : &objfile
->static_psymbols
,
15589 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15591 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15595 /* We'll save this DIE so link it in. */
15596 part_die
->die_parent
= parent_die
;
15597 part_die
->die_sibling
= NULL
;
15598 part_die
->die_child
= NULL
;
15600 if (last_die
&& last_die
== parent_die
)
15601 last_die
->die_child
= part_die
;
15603 last_die
->die_sibling
= part_die
;
15605 last_die
= part_die
;
15607 if (first_die
== NULL
)
15608 first_die
= part_die
;
15610 /* Maybe add the DIE to the hash table. Not all DIEs that we
15611 find interesting need to be in the hash table, because we
15612 also have the parent/sibling/child chains; only those that we
15613 might refer to by offset later during partial symbol reading.
15615 For now this means things that might have be the target of a
15616 DW_AT_specification, DW_AT_abstract_origin, or
15617 DW_AT_extension. DW_AT_extension will refer only to
15618 namespaces; DW_AT_abstract_origin refers to functions (and
15619 many things under the function DIE, but we do not recurse
15620 into function DIEs during partial symbol reading) and
15621 possibly variables as well; DW_AT_specification refers to
15622 declarations. Declarations ought to have the DW_AT_declaration
15623 flag. It happens that GCC forgets to put it in sometimes, but
15624 only for functions, not for types.
15626 Adding more things than necessary to the hash table is harmless
15627 except for the performance cost. Adding too few will result in
15628 wasted time in find_partial_die, when we reread the compilation
15629 unit with load_all_dies set. */
15632 || abbrev
->tag
== DW_TAG_constant
15633 || abbrev
->tag
== DW_TAG_subprogram
15634 || abbrev
->tag
== DW_TAG_variable
15635 || abbrev
->tag
== DW_TAG_namespace
15636 || part_die
->is_declaration
)
15640 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15641 part_die
->offset
.sect_off
, INSERT
);
15645 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15646 sizeof (struct partial_die_info
));
15648 /* For some DIEs we want to follow their children (if any). For C
15649 we have no reason to follow the children of structures; for other
15650 languages we have to, so that we can get at method physnames
15651 to infer fully qualified class names, for DW_AT_specification,
15652 and for C++ template arguments. For C++, we also look one level
15653 inside functions to find template arguments (if the name of the
15654 function does not already contain the template arguments).
15656 For Ada, we need to scan the children of subprograms and lexical
15657 blocks as well because Ada allows the definition of nested
15658 entities that could be interesting for the debugger, such as
15659 nested subprograms for instance. */
15660 if (last_die
->has_children
15662 || last_die
->tag
== DW_TAG_namespace
15663 || last_die
->tag
== DW_TAG_module
15664 || last_die
->tag
== DW_TAG_enumeration_type
15665 || (cu
->language
== language_cplus
15666 && last_die
->tag
== DW_TAG_subprogram
15667 && (last_die
->name
== NULL
15668 || strchr (last_die
->name
, '<') == NULL
))
15669 || (cu
->language
!= language_c
15670 && (last_die
->tag
== DW_TAG_class_type
15671 || last_die
->tag
== DW_TAG_interface_type
15672 || last_die
->tag
== DW_TAG_structure_type
15673 || last_die
->tag
== DW_TAG_union_type
))
15674 || (cu
->language
== language_ada
15675 && (last_die
->tag
== DW_TAG_subprogram
15676 || last_die
->tag
== DW_TAG_lexical_block
))))
15679 parent_die
= last_die
;
15683 /* Otherwise we skip to the next sibling, if any. */
15684 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15686 /* Back to the top, do it again. */
15690 /* Read a minimal amount of information into the minimal die structure. */
15692 static const gdb_byte
*
15693 read_partial_die (const struct die_reader_specs
*reader
,
15694 struct partial_die_info
*part_die
,
15695 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15696 const gdb_byte
*info_ptr
)
15698 struct dwarf2_cu
*cu
= reader
->cu
;
15699 struct objfile
*objfile
= cu
->objfile
;
15700 const gdb_byte
*buffer
= reader
->buffer
;
15702 struct attribute attr
;
15703 int has_low_pc_attr
= 0;
15704 int has_high_pc_attr
= 0;
15705 int high_pc_relative
= 0;
15707 memset (part_die
, 0, sizeof (struct partial_die_info
));
15709 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15711 info_ptr
+= abbrev_len
;
15713 if (abbrev
== NULL
)
15716 part_die
->tag
= abbrev
->tag
;
15717 part_die
->has_children
= abbrev
->has_children
;
15719 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15721 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15723 /* Store the data if it is of an attribute we want to keep in a
15724 partial symbol table. */
15728 switch (part_die
->tag
)
15730 case DW_TAG_compile_unit
:
15731 case DW_TAG_partial_unit
:
15732 case DW_TAG_type_unit
:
15733 /* Compilation units have a DW_AT_name that is a filename, not
15734 a source language identifier. */
15735 case DW_TAG_enumeration_type
:
15736 case DW_TAG_enumerator
:
15737 /* These tags always have simple identifiers already; no need
15738 to canonicalize them. */
15739 part_die
->name
= DW_STRING (&attr
);
15743 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15744 &objfile
->per_bfd
->storage_obstack
);
15748 case DW_AT_linkage_name
:
15749 case DW_AT_MIPS_linkage_name
:
15750 /* Note that both forms of linkage name might appear. We
15751 assume they will be the same, and we only store the last
15753 if (cu
->language
== language_ada
)
15754 part_die
->name
= DW_STRING (&attr
);
15755 part_die
->linkage_name
= DW_STRING (&attr
);
15758 has_low_pc_attr
= 1;
15759 part_die
->lowpc
= attr_value_as_address (&attr
);
15761 case DW_AT_high_pc
:
15762 has_high_pc_attr
= 1;
15763 part_die
->highpc
= attr_value_as_address (&attr
);
15764 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15765 high_pc_relative
= 1;
15767 case DW_AT_location
:
15768 /* Support the .debug_loc offsets. */
15769 if (attr_form_is_block (&attr
))
15771 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15773 else if (attr_form_is_section_offset (&attr
))
15775 dwarf2_complex_location_expr_complaint ();
15779 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15780 "partial symbol information");
15783 case DW_AT_external
:
15784 part_die
->is_external
= DW_UNSND (&attr
);
15786 case DW_AT_declaration
:
15787 part_die
->is_declaration
= DW_UNSND (&attr
);
15790 part_die
->has_type
= 1;
15792 case DW_AT_abstract_origin
:
15793 case DW_AT_specification
:
15794 case DW_AT_extension
:
15795 part_die
->has_specification
= 1;
15796 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15797 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15798 || cu
->per_cu
->is_dwz
);
15800 case DW_AT_sibling
:
15801 /* Ignore absolute siblings, they might point outside of
15802 the current compile unit. */
15803 if (attr
.form
== DW_FORM_ref_addr
)
15804 complaint (&symfile_complaints
,
15805 _("ignoring absolute DW_AT_sibling"));
15808 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15809 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15811 if (sibling_ptr
< info_ptr
)
15812 complaint (&symfile_complaints
,
15813 _("DW_AT_sibling points backwards"));
15814 else if (sibling_ptr
> reader
->buffer_end
)
15815 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15817 part_die
->sibling
= sibling_ptr
;
15820 case DW_AT_byte_size
:
15821 part_die
->has_byte_size
= 1;
15823 case DW_AT_calling_convention
:
15824 /* DWARF doesn't provide a way to identify a program's source-level
15825 entry point. DW_AT_calling_convention attributes are only meant
15826 to describe functions' calling conventions.
15828 However, because it's a necessary piece of information in
15829 Fortran, and because DW_CC_program is the only piece of debugging
15830 information whose definition refers to a 'main program' at all,
15831 several compilers have begun marking Fortran main programs with
15832 DW_CC_program --- even when those functions use the standard
15833 calling conventions.
15835 So until DWARF specifies a way to provide this information and
15836 compilers pick up the new representation, we'll support this
15838 if (DW_UNSND (&attr
) == DW_CC_program
15839 && cu
->language
== language_fortran
)
15840 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15843 if (DW_UNSND (&attr
) == DW_INL_inlined
15844 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15845 part_die
->may_be_inlined
= 1;
15849 if (part_die
->tag
== DW_TAG_imported_unit
)
15851 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15852 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15853 || cu
->per_cu
->is_dwz
);
15862 if (high_pc_relative
)
15863 part_die
->highpc
+= part_die
->lowpc
;
15865 if (has_low_pc_attr
&& has_high_pc_attr
)
15867 /* When using the GNU linker, .gnu.linkonce. sections are used to
15868 eliminate duplicate copies of functions and vtables and such.
15869 The linker will arbitrarily choose one and discard the others.
15870 The AT_*_pc values for such functions refer to local labels in
15871 these sections. If the section from that file was discarded, the
15872 labels are not in the output, so the relocs get a value of 0.
15873 If this is a discarded function, mark the pc bounds as invalid,
15874 so that GDB will ignore it. */
15875 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15877 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15879 complaint (&symfile_complaints
,
15880 _("DW_AT_low_pc %s is zero "
15881 "for DIE at 0x%x [in module %s]"),
15882 paddress (gdbarch
, part_die
->lowpc
),
15883 part_die
->offset
.sect_off
, objfile_name (objfile
));
15885 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15886 else if (part_die
->lowpc
>= part_die
->highpc
)
15888 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15890 complaint (&symfile_complaints
,
15891 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15892 "for DIE at 0x%x [in module %s]"),
15893 paddress (gdbarch
, part_die
->lowpc
),
15894 paddress (gdbarch
, part_die
->highpc
),
15895 part_die
->offset
.sect_off
, objfile_name (objfile
));
15898 part_die
->has_pc_info
= 1;
15904 /* Find a cached partial DIE at OFFSET in CU. */
15906 static struct partial_die_info
*
15907 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15909 struct partial_die_info
*lookup_die
= NULL
;
15910 struct partial_die_info part_die
;
15912 part_die
.offset
= offset
;
15913 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
15919 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15920 except in the case of .debug_types DIEs which do not reference
15921 outside their CU (they do however referencing other types via
15922 DW_FORM_ref_sig8). */
15924 static struct partial_die_info
*
15925 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
15927 struct objfile
*objfile
= cu
->objfile
;
15928 struct dwarf2_per_cu_data
*per_cu
= NULL
;
15929 struct partial_die_info
*pd
= NULL
;
15931 if (offset_in_dwz
== cu
->per_cu
->is_dwz
15932 && offset_in_cu_p (&cu
->header
, offset
))
15934 pd
= find_partial_die_in_comp_unit (offset
, cu
);
15937 /* We missed recording what we needed.
15938 Load all dies and try again. */
15939 per_cu
= cu
->per_cu
;
15943 /* TUs don't reference other CUs/TUs (except via type signatures). */
15944 if (cu
->per_cu
->is_debug_types
)
15946 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
15947 " external reference to offset 0x%lx [in module %s].\n"),
15948 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
15949 bfd_get_filename (objfile
->obfd
));
15951 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
15954 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
15955 load_partial_comp_unit (per_cu
);
15957 per_cu
->cu
->last_used
= 0;
15958 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15961 /* If we didn't find it, and not all dies have been loaded,
15962 load them all and try again. */
15964 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
15966 per_cu
->load_all_dies
= 1;
15968 /* This is nasty. When we reread the DIEs, somewhere up the call chain
15969 THIS_CU->cu may already be in use. So we can't just free it and
15970 replace its DIEs with the ones we read in. Instead, we leave those
15971 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
15972 and clobber THIS_CU->cu->partial_dies with the hash table for the new
15974 load_partial_comp_unit (per_cu
);
15976 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15980 internal_error (__FILE__
, __LINE__
,
15981 _("could not find partial DIE 0x%x "
15982 "in cache [from module %s]\n"),
15983 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
15987 /* See if we can figure out if the class lives in a namespace. We do
15988 this by looking for a member function; its demangled name will
15989 contain namespace info, if there is any. */
15992 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
15993 struct dwarf2_cu
*cu
)
15995 /* NOTE: carlton/2003-10-07: Getting the info this way changes
15996 what template types look like, because the demangler
15997 frequently doesn't give the same name as the debug info. We
15998 could fix this by only using the demangled name to get the
15999 prefix (but see comment in read_structure_type). */
16001 struct partial_die_info
*real_pdi
;
16002 struct partial_die_info
*child_pdi
;
16004 /* If this DIE (this DIE's specification, if any) has a parent, then
16005 we should not do this. We'll prepend the parent's fully qualified
16006 name when we create the partial symbol. */
16008 real_pdi
= struct_pdi
;
16009 while (real_pdi
->has_specification
)
16010 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16011 real_pdi
->spec_is_dwz
, cu
);
16013 if (real_pdi
->die_parent
!= NULL
)
16016 for (child_pdi
= struct_pdi
->die_child
;
16018 child_pdi
= child_pdi
->die_sibling
)
16020 if (child_pdi
->tag
== DW_TAG_subprogram
16021 && child_pdi
->linkage_name
!= NULL
)
16023 char *actual_class_name
16024 = language_class_name_from_physname (cu
->language_defn
,
16025 child_pdi
->linkage_name
);
16026 if (actual_class_name
!= NULL
)
16029 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16031 strlen (actual_class_name
));
16032 xfree (actual_class_name
);
16039 /* Adjust PART_DIE before generating a symbol for it. This function
16040 may set the is_external flag or change the DIE's name. */
16043 fixup_partial_die (struct partial_die_info
*part_die
,
16044 struct dwarf2_cu
*cu
)
16046 /* Once we've fixed up a die, there's no point in doing so again.
16047 This also avoids a memory leak if we were to call
16048 guess_partial_die_structure_name multiple times. */
16049 if (part_die
->fixup_called
)
16052 /* If we found a reference attribute and the DIE has no name, try
16053 to find a name in the referred to DIE. */
16055 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16057 struct partial_die_info
*spec_die
;
16059 spec_die
= find_partial_die (part_die
->spec_offset
,
16060 part_die
->spec_is_dwz
, cu
);
16062 fixup_partial_die (spec_die
, cu
);
16064 if (spec_die
->name
)
16066 part_die
->name
= spec_die
->name
;
16068 /* Copy DW_AT_external attribute if it is set. */
16069 if (spec_die
->is_external
)
16070 part_die
->is_external
= spec_die
->is_external
;
16074 /* Set default names for some unnamed DIEs. */
16076 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16077 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16079 /* If there is no parent die to provide a namespace, and there are
16080 children, see if we can determine the namespace from their linkage
16082 if (cu
->language
== language_cplus
16083 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16084 && part_die
->die_parent
== NULL
16085 && part_die
->has_children
16086 && (part_die
->tag
== DW_TAG_class_type
16087 || part_die
->tag
== DW_TAG_structure_type
16088 || part_die
->tag
== DW_TAG_union_type
))
16089 guess_partial_die_structure_name (part_die
, cu
);
16091 /* GCC might emit a nameless struct or union that has a linkage
16092 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16093 if (part_die
->name
== NULL
16094 && (part_die
->tag
== DW_TAG_class_type
16095 || part_die
->tag
== DW_TAG_interface_type
16096 || part_die
->tag
== DW_TAG_structure_type
16097 || part_die
->tag
== DW_TAG_union_type
)
16098 && part_die
->linkage_name
!= NULL
)
16102 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16107 /* Strip any leading namespaces/classes, keep only the base name.
16108 DW_AT_name for named DIEs does not contain the prefixes. */
16109 base
= strrchr (demangled
, ':');
16110 if (base
&& base
> demangled
&& base
[-1] == ':')
16116 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16117 base
, strlen (base
));
16122 part_die
->fixup_called
= 1;
16125 /* Read an attribute value described by an attribute form. */
16127 static const gdb_byte
*
16128 read_attribute_value (const struct die_reader_specs
*reader
,
16129 struct attribute
*attr
, unsigned form
,
16130 const gdb_byte
*info_ptr
)
16132 struct dwarf2_cu
*cu
= reader
->cu
;
16133 struct objfile
*objfile
= cu
->objfile
;
16134 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16135 bfd
*abfd
= reader
->abfd
;
16136 struct comp_unit_head
*cu_header
= &cu
->header
;
16137 unsigned int bytes_read
;
16138 struct dwarf_block
*blk
;
16143 case DW_FORM_ref_addr
:
16144 if (cu
->header
.version
== 2)
16145 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16147 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16148 &cu
->header
, &bytes_read
);
16149 info_ptr
+= bytes_read
;
16151 case DW_FORM_GNU_ref_alt
:
16152 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16153 info_ptr
+= bytes_read
;
16156 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16157 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16158 info_ptr
+= bytes_read
;
16160 case DW_FORM_block2
:
16161 blk
= dwarf_alloc_block (cu
);
16162 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16164 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16165 info_ptr
+= blk
->size
;
16166 DW_BLOCK (attr
) = blk
;
16168 case DW_FORM_block4
:
16169 blk
= dwarf_alloc_block (cu
);
16170 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16172 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16173 info_ptr
+= blk
->size
;
16174 DW_BLOCK (attr
) = blk
;
16176 case DW_FORM_data2
:
16177 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16180 case DW_FORM_data4
:
16181 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16184 case DW_FORM_data8
:
16185 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16188 case DW_FORM_sec_offset
:
16189 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16190 info_ptr
+= bytes_read
;
16192 case DW_FORM_string
:
16193 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16194 DW_STRING_IS_CANONICAL (attr
) = 0;
16195 info_ptr
+= bytes_read
;
16198 if (!cu
->per_cu
->is_dwz
)
16200 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16202 DW_STRING_IS_CANONICAL (attr
) = 0;
16203 info_ptr
+= bytes_read
;
16207 case DW_FORM_GNU_strp_alt
:
16209 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16210 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16213 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16214 DW_STRING_IS_CANONICAL (attr
) = 0;
16215 info_ptr
+= bytes_read
;
16218 case DW_FORM_exprloc
:
16219 case DW_FORM_block
:
16220 blk
= dwarf_alloc_block (cu
);
16221 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16222 info_ptr
+= bytes_read
;
16223 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16224 info_ptr
+= blk
->size
;
16225 DW_BLOCK (attr
) = blk
;
16227 case DW_FORM_block1
:
16228 blk
= dwarf_alloc_block (cu
);
16229 blk
->size
= read_1_byte (abfd
, info_ptr
);
16231 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16232 info_ptr
+= blk
->size
;
16233 DW_BLOCK (attr
) = blk
;
16235 case DW_FORM_data1
:
16236 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16240 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16243 case DW_FORM_flag_present
:
16244 DW_UNSND (attr
) = 1;
16246 case DW_FORM_sdata
:
16247 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16248 info_ptr
+= bytes_read
;
16250 case DW_FORM_udata
:
16251 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16252 info_ptr
+= bytes_read
;
16255 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16256 + read_1_byte (abfd
, info_ptr
));
16260 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16261 + read_2_bytes (abfd
, info_ptr
));
16265 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16266 + read_4_bytes (abfd
, info_ptr
));
16270 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16271 + read_8_bytes (abfd
, info_ptr
));
16274 case DW_FORM_ref_sig8
:
16275 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16278 case DW_FORM_ref_udata
:
16279 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16280 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16281 info_ptr
+= bytes_read
;
16283 case DW_FORM_indirect
:
16284 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16285 info_ptr
+= bytes_read
;
16286 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16288 case DW_FORM_GNU_addr_index
:
16289 if (reader
->dwo_file
== NULL
)
16291 /* For now flag a hard error.
16292 Later we can turn this into a complaint. */
16293 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16294 dwarf_form_name (form
),
16295 bfd_get_filename (abfd
));
16297 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16298 info_ptr
+= bytes_read
;
16300 case DW_FORM_GNU_str_index
:
16301 if (reader
->dwo_file
== NULL
)
16303 /* For now flag a hard error.
16304 Later we can turn this into a complaint if warranted. */
16305 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16306 dwarf_form_name (form
),
16307 bfd_get_filename (abfd
));
16310 ULONGEST str_index
=
16311 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16313 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16314 DW_STRING_IS_CANONICAL (attr
) = 0;
16315 info_ptr
+= bytes_read
;
16319 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16320 dwarf_form_name (form
),
16321 bfd_get_filename (abfd
));
16325 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16326 attr
->form
= DW_FORM_GNU_ref_alt
;
16328 /* We have seen instances where the compiler tried to emit a byte
16329 size attribute of -1 which ended up being encoded as an unsigned
16330 0xffffffff. Although 0xffffffff is technically a valid size value,
16331 an object of this size seems pretty unlikely so we can relatively
16332 safely treat these cases as if the size attribute was invalid and
16333 treat them as zero by default. */
16334 if (attr
->name
== DW_AT_byte_size
16335 && form
== DW_FORM_data4
16336 && DW_UNSND (attr
) >= 0xffffffff)
16339 (&symfile_complaints
,
16340 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16341 hex_string (DW_UNSND (attr
)));
16342 DW_UNSND (attr
) = 0;
16348 /* Read an attribute described by an abbreviated attribute. */
16350 static const gdb_byte
*
16351 read_attribute (const struct die_reader_specs
*reader
,
16352 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16353 const gdb_byte
*info_ptr
)
16355 attr
->name
= abbrev
->name
;
16356 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16359 /* Read dwarf information from a buffer. */
16361 static unsigned int
16362 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16364 return bfd_get_8 (abfd
, buf
);
16368 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16370 return bfd_get_signed_8 (abfd
, buf
);
16373 static unsigned int
16374 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16376 return bfd_get_16 (abfd
, buf
);
16380 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16382 return bfd_get_signed_16 (abfd
, buf
);
16385 static unsigned int
16386 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16388 return bfd_get_32 (abfd
, buf
);
16392 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16394 return bfd_get_signed_32 (abfd
, buf
);
16398 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16400 return bfd_get_64 (abfd
, buf
);
16404 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16405 unsigned int *bytes_read
)
16407 struct comp_unit_head
*cu_header
= &cu
->header
;
16408 CORE_ADDR retval
= 0;
16410 if (cu_header
->signed_addr_p
)
16412 switch (cu_header
->addr_size
)
16415 retval
= bfd_get_signed_16 (abfd
, buf
);
16418 retval
= bfd_get_signed_32 (abfd
, buf
);
16421 retval
= bfd_get_signed_64 (abfd
, buf
);
16424 internal_error (__FILE__
, __LINE__
,
16425 _("read_address: bad switch, signed [in module %s]"),
16426 bfd_get_filename (abfd
));
16431 switch (cu_header
->addr_size
)
16434 retval
= bfd_get_16 (abfd
, buf
);
16437 retval
= bfd_get_32 (abfd
, buf
);
16440 retval
= bfd_get_64 (abfd
, buf
);
16443 internal_error (__FILE__
, __LINE__
,
16444 _("read_address: bad switch, "
16445 "unsigned [in module %s]"),
16446 bfd_get_filename (abfd
));
16450 *bytes_read
= cu_header
->addr_size
;
16454 /* Read the initial length from a section. The (draft) DWARF 3
16455 specification allows the initial length to take up either 4 bytes
16456 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16457 bytes describe the length and all offsets will be 8 bytes in length
16460 An older, non-standard 64-bit format is also handled by this
16461 function. The older format in question stores the initial length
16462 as an 8-byte quantity without an escape value. Lengths greater
16463 than 2^32 aren't very common which means that the initial 4 bytes
16464 is almost always zero. Since a length value of zero doesn't make
16465 sense for the 32-bit format, this initial zero can be considered to
16466 be an escape value which indicates the presence of the older 64-bit
16467 format. As written, the code can't detect (old format) lengths
16468 greater than 4GB. If it becomes necessary to handle lengths
16469 somewhat larger than 4GB, we could allow other small values (such
16470 as the non-sensical values of 1, 2, and 3) to also be used as
16471 escape values indicating the presence of the old format.
16473 The value returned via bytes_read should be used to increment the
16474 relevant pointer after calling read_initial_length().
16476 [ Note: read_initial_length() and read_offset() are based on the
16477 document entitled "DWARF Debugging Information Format", revision
16478 3, draft 8, dated November 19, 2001. This document was obtained
16481 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16483 This document is only a draft and is subject to change. (So beware.)
16485 Details regarding the older, non-standard 64-bit format were
16486 determined empirically by examining 64-bit ELF files produced by
16487 the SGI toolchain on an IRIX 6.5 machine.
16489 - Kevin, July 16, 2002
16493 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16495 LONGEST length
= bfd_get_32 (abfd
, buf
);
16497 if (length
== 0xffffffff)
16499 length
= bfd_get_64 (abfd
, buf
+ 4);
16502 else if (length
== 0)
16504 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16505 length
= bfd_get_64 (abfd
, buf
);
16516 /* Cover function for read_initial_length.
16517 Returns the length of the object at BUF, and stores the size of the
16518 initial length in *BYTES_READ and stores the size that offsets will be in
16520 If the initial length size is not equivalent to that specified in
16521 CU_HEADER then issue a complaint.
16522 This is useful when reading non-comp-unit headers. */
16525 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16526 const struct comp_unit_head
*cu_header
,
16527 unsigned int *bytes_read
,
16528 unsigned int *offset_size
)
16530 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16532 gdb_assert (cu_header
->initial_length_size
== 4
16533 || cu_header
->initial_length_size
== 8
16534 || cu_header
->initial_length_size
== 12);
16536 if (cu_header
->initial_length_size
!= *bytes_read
)
16537 complaint (&symfile_complaints
,
16538 _("intermixed 32-bit and 64-bit DWARF sections"));
16540 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16544 /* Read an offset from the data stream. The size of the offset is
16545 given by cu_header->offset_size. */
16548 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16549 const struct comp_unit_head
*cu_header
,
16550 unsigned int *bytes_read
)
16552 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16554 *bytes_read
= cu_header
->offset_size
;
16558 /* Read an offset from the data stream. */
16561 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16563 LONGEST retval
= 0;
16565 switch (offset_size
)
16568 retval
= bfd_get_32 (abfd
, buf
);
16571 retval
= bfd_get_64 (abfd
, buf
);
16574 internal_error (__FILE__
, __LINE__
,
16575 _("read_offset_1: bad switch [in module %s]"),
16576 bfd_get_filename (abfd
));
16582 static const gdb_byte
*
16583 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16585 /* If the size of a host char is 8 bits, we can return a pointer
16586 to the buffer, otherwise we have to copy the data to a buffer
16587 allocated on the temporary obstack. */
16588 gdb_assert (HOST_CHAR_BIT
== 8);
16592 static const char *
16593 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16594 unsigned int *bytes_read_ptr
)
16596 /* If the size of a host char is 8 bits, we can return a pointer
16597 to the string, otherwise we have to copy the string to a buffer
16598 allocated on the temporary obstack. */
16599 gdb_assert (HOST_CHAR_BIT
== 8);
16602 *bytes_read_ptr
= 1;
16605 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16606 return (const char *) buf
;
16609 static const char *
16610 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16612 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16613 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16614 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16615 bfd_get_filename (abfd
));
16616 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16617 error (_("DW_FORM_strp pointing outside of "
16618 ".debug_str section [in module %s]"),
16619 bfd_get_filename (abfd
));
16620 gdb_assert (HOST_CHAR_BIT
== 8);
16621 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16623 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16626 /* Read a string at offset STR_OFFSET in the .debug_str section from
16627 the .dwz file DWZ. Throw an error if the offset is too large. If
16628 the string consists of a single NUL byte, return NULL; otherwise
16629 return a pointer to the string. */
16631 static const char *
16632 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16634 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16636 if (dwz
->str
.buffer
== NULL
)
16637 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16638 "section [in module %s]"),
16639 bfd_get_filename (dwz
->dwz_bfd
));
16640 if (str_offset
>= dwz
->str
.size
)
16641 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16642 ".debug_str section [in module %s]"),
16643 bfd_get_filename (dwz
->dwz_bfd
));
16644 gdb_assert (HOST_CHAR_BIT
== 8);
16645 if (dwz
->str
.buffer
[str_offset
] == '\0')
16647 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16650 static const char *
16651 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16652 const struct comp_unit_head
*cu_header
,
16653 unsigned int *bytes_read_ptr
)
16655 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16657 return read_indirect_string_at_offset (abfd
, str_offset
);
16661 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16662 unsigned int *bytes_read_ptr
)
16665 unsigned int num_read
;
16667 unsigned char byte
;
16675 byte
= bfd_get_8 (abfd
, buf
);
16678 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16679 if ((byte
& 128) == 0)
16685 *bytes_read_ptr
= num_read
;
16690 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16691 unsigned int *bytes_read_ptr
)
16694 int i
, shift
, num_read
;
16695 unsigned char byte
;
16703 byte
= bfd_get_8 (abfd
, buf
);
16706 result
|= ((LONGEST
) (byte
& 127) << shift
);
16708 if ((byte
& 128) == 0)
16713 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16714 result
|= -(((LONGEST
) 1) << shift
);
16715 *bytes_read_ptr
= num_read
;
16719 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16720 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16721 ADDR_SIZE is the size of addresses from the CU header. */
16724 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16726 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16727 bfd
*abfd
= objfile
->obfd
;
16728 const gdb_byte
*info_ptr
;
16730 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16731 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16732 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16733 objfile_name (objfile
));
16734 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16735 error (_("DW_FORM_addr_index pointing outside of "
16736 ".debug_addr section [in module %s]"),
16737 objfile_name (objfile
));
16738 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16739 + addr_base
+ addr_index
* addr_size
);
16740 if (addr_size
== 4)
16741 return bfd_get_32 (abfd
, info_ptr
);
16743 return bfd_get_64 (abfd
, info_ptr
);
16746 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16749 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16751 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16754 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16757 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16758 unsigned int *bytes_read
)
16760 bfd
*abfd
= cu
->objfile
->obfd
;
16761 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16763 return read_addr_index (cu
, addr_index
);
16766 /* Data structure to pass results from dwarf2_read_addr_index_reader
16767 back to dwarf2_read_addr_index. */
16769 struct dwarf2_read_addr_index_data
16771 ULONGEST addr_base
;
16775 /* die_reader_func for dwarf2_read_addr_index. */
16778 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16779 const gdb_byte
*info_ptr
,
16780 struct die_info
*comp_unit_die
,
16784 struct dwarf2_cu
*cu
= reader
->cu
;
16785 struct dwarf2_read_addr_index_data
*aidata
=
16786 (struct dwarf2_read_addr_index_data
*) data
;
16788 aidata
->addr_base
= cu
->addr_base
;
16789 aidata
->addr_size
= cu
->header
.addr_size
;
16792 /* Given an index in .debug_addr, fetch the value.
16793 NOTE: This can be called during dwarf expression evaluation,
16794 long after the debug information has been read, and thus per_cu->cu
16795 may no longer exist. */
16798 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16799 unsigned int addr_index
)
16801 struct objfile
*objfile
= per_cu
->objfile
;
16802 struct dwarf2_cu
*cu
= per_cu
->cu
;
16803 ULONGEST addr_base
;
16806 /* This is intended to be called from outside this file. */
16807 dw2_setup (objfile
);
16809 /* We need addr_base and addr_size.
16810 If we don't have PER_CU->cu, we have to get it.
16811 Nasty, but the alternative is storing the needed info in PER_CU,
16812 which at this point doesn't seem justified: it's not clear how frequently
16813 it would get used and it would increase the size of every PER_CU.
16814 Entry points like dwarf2_per_cu_addr_size do a similar thing
16815 so we're not in uncharted territory here.
16816 Alas we need to be a bit more complicated as addr_base is contained
16819 We don't need to read the entire CU(/TU).
16820 We just need the header and top level die.
16822 IWBN to use the aging mechanism to let us lazily later discard the CU.
16823 For now we skip this optimization. */
16827 addr_base
= cu
->addr_base
;
16828 addr_size
= cu
->header
.addr_size
;
16832 struct dwarf2_read_addr_index_data aidata
;
16834 /* Note: We can't use init_cutu_and_read_dies_simple here,
16835 we need addr_base. */
16836 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16837 dwarf2_read_addr_index_reader
, &aidata
);
16838 addr_base
= aidata
.addr_base
;
16839 addr_size
= aidata
.addr_size
;
16842 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16845 /* Given a DW_FORM_GNU_str_index, fetch the string.
16846 This is only used by the Fission support. */
16848 static const char *
16849 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16851 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16852 const char *objf_name
= objfile_name (objfile
);
16853 bfd
*abfd
= objfile
->obfd
;
16854 struct dwarf2_cu
*cu
= reader
->cu
;
16855 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16856 struct dwarf2_section_info
*str_offsets_section
=
16857 &reader
->dwo_file
->sections
.str_offsets
;
16858 const gdb_byte
*info_ptr
;
16859 ULONGEST str_offset
;
16860 static const char form_name
[] = "DW_FORM_GNU_str_index";
16862 dwarf2_read_section (objfile
, str_section
);
16863 dwarf2_read_section (objfile
, str_offsets_section
);
16864 if (str_section
->buffer
== NULL
)
16865 error (_("%s used without .debug_str.dwo section"
16866 " in CU at offset 0x%lx [in module %s]"),
16867 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16868 if (str_offsets_section
->buffer
== NULL
)
16869 error (_("%s used without .debug_str_offsets.dwo section"
16870 " in CU at offset 0x%lx [in module %s]"),
16871 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16872 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16873 error (_("%s pointing outside of .debug_str_offsets.dwo"
16874 " section in CU at offset 0x%lx [in module %s]"),
16875 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16876 info_ptr
= (str_offsets_section
->buffer
16877 + str_index
* cu
->header
.offset_size
);
16878 if (cu
->header
.offset_size
== 4)
16879 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16881 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16882 if (str_offset
>= str_section
->size
)
16883 error (_("Offset from %s pointing outside of"
16884 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16885 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16886 return (const char *) (str_section
->buffer
+ str_offset
);
16889 /* Return the length of an LEB128 number in BUF. */
16892 leb128_size (const gdb_byte
*buf
)
16894 const gdb_byte
*begin
= buf
;
16900 if ((byte
& 128) == 0)
16901 return buf
- begin
;
16906 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16915 cu
->language
= language_c
;
16917 case DW_LANG_C_plus_plus
:
16918 case DW_LANG_C_plus_plus_11
:
16919 case DW_LANG_C_plus_plus_14
:
16920 cu
->language
= language_cplus
;
16923 cu
->language
= language_d
;
16925 case DW_LANG_Fortran77
:
16926 case DW_LANG_Fortran90
:
16927 case DW_LANG_Fortran95
:
16928 cu
->language
= language_fortran
;
16931 cu
->language
= language_go
;
16933 case DW_LANG_Mips_Assembler
:
16934 cu
->language
= language_asm
;
16937 cu
->language
= language_java
;
16939 case DW_LANG_Ada83
:
16940 case DW_LANG_Ada95
:
16941 cu
->language
= language_ada
;
16943 case DW_LANG_Modula2
:
16944 cu
->language
= language_m2
;
16946 case DW_LANG_Pascal83
:
16947 cu
->language
= language_pascal
;
16950 cu
->language
= language_objc
;
16952 case DW_LANG_Cobol74
:
16953 case DW_LANG_Cobol85
:
16955 cu
->language
= language_minimal
;
16958 cu
->language_defn
= language_def (cu
->language
);
16961 /* Return the named attribute or NULL if not there. */
16963 static struct attribute
*
16964 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
16969 struct attribute
*spec
= NULL
;
16971 for (i
= 0; i
< die
->num_attrs
; ++i
)
16973 if (die
->attrs
[i
].name
== name
)
16974 return &die
->attrs
[i
];
16975 if (die
->attrs
[i
].name
== DW_AT_specification
16976 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
16977 spec
= &die
->attrs
[i
];
16983 die
= follow_die_ref (die
, spec
, &cu
);
16989 /* Return the named attribute or NULL if not there,
16990 but do not follow DW_AT_specification, etc.
16991 This is for use in contexts where we're reading .debug_types dies.
16992 Following DW_AT_specification, DW_AT_abstract_origin will take us
16993 back up the chain, and we want to go down. */
16995 static struct attribute
*
16996 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17000 for (i
= 0; i
< die
->num_attrs
; ++i
)
17001 if (die
->attrs
[i
].name
== name
)
17002 return &die
->attrs
[i
];
17007 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17008 and holds a non-zero value. This function should only be used for
17009 DW_FORM_flag or DW_FORM_flag_present attributes. */
17012 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17014 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17016 return (attr
&& DW_UNSND (attr
));
17020 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17022 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17023 which value is non-zero. However, we have to be careful with
17024 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17025 (via dwarf2_flag_true_p) follows this attribute. So we may
17026 end up accidently finding a declaration attribute that belongs
17027 to a different DIE referenced by the specification attribute,
17028 even though the given DIE does not have a declaration attribute. */
17029 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17030 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17033 /* Return the die giving the specification for DIE, if there is
17034 one. *SPEC_CU is the CU containing DIE on input, and the CU
17035 containing the return value on output. If there is no
17036 specification, but there is an abstract origin, that is
17039 static struct die_info
*
17040 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17042 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17045 if (spec_attr
== NULL
)
17046 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17048 if (spec_attr
== NULL
)
17051 return follow_die_ref (die
, spec_attr
, spec_cu
);
17054 /* Free the line_header structure *LH, and any arrays and strings it
17056 NOTE: This is also used as a "cleanup" function. */
17059 free_line_header (struct line_header
*lh
)
17061 if (lh
->standard_opcode_lengths
)
17062 xfree (lh
->standard_opcode_lengths
);
17064 /* Remember that all the lh->file_names[i].name pointers are
17065 pointers into debug_line_buffer, and don't need to be freed. */
17066 if (lh
->file_names
)
17067 xfree (lh
->file_names
);
17069 /* Similarly for the include directory names. */
17070 if (lh
->include_dirs
)
17071 xfree (lh
->include_dirs
);
17076 /* Stub for free_line_header to match void * callback types. */
17079 free_line_header_voidp (void *arg
)
17081 struct line_header
*lh
= arg
;
17083 free_line_header (lh
);
17086 /* Add an entry to LH's include directory table. */
17089 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17091 /* Grow the array if necessary. */
17092 if (lh
->include_dirs_size
== 0)
17094 lh
->include_dirs_size
= 1; /* for testing */
17095 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
17096 * sizeof (*lh
->include_dirs
));
17098 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17100 lh
->include_dirs_size
*= 2;
17101 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
17102 (lh
->include_dirs_size
17103 * sizeof (*lh
->include_dirs
)));
17106 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17109 /* Add an entry to LH's file name table. */
17112 add_file_name (struct line_header
*lh
,
17114 unsigned int dir_index
,
17115 unsigned int mod_time
,
17116 unsigned int length
)
17118 struct file_entry
*fe
;
17120 /* Grow the array if necessary. */
17121 if (lh
->file_names_size
== 0)
17123 lh
->file_names_size
= 1; /* for testing */
17124 lh
->file_names
= xmalloc (lh
->file_names_size
17125 * sizeof (*lh
->file_names
));
17127 else if (lh
->num_file_names
>= lh
->file_names_size
)
17129 lh
->file_names_size
*= 2;
17130 lh
->file_names
= xrealloc (lh
->file_names
,
17131 (lh
->file_names_size
17132 * sizeof (*lh
->file_names
)));
17135 fe
= &lh
->file_names
[lh
->num_file_names
++];
17137 fe
->dir_index
= dir_index
;
17138 fe
->mod_time
= mod_time
;
17139 fe
->length
= length
;
17140 fe
->included_p
= 0;
17144 /* A convenience function to find the proper .debug_line section for a
17147 static struct dwarf2_section_info
*
17148 get_debug_line_section (struct dwarf2_cu
*cu
)
17150 struct dwarf2_section_info
*section
;
17152 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17154 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17155 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17156 else if (cu
->per_cu
->is_dwz
)
17158 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17160 section
= &dwz
->line
;
17163 section
= &dwarf2_per_objfile
->line
;
17168 /* Read the statement program header starting at OFFSET in
17169 .debug_line, or .debug_line.dwo. Return a pointer
17170 to a struct line_header, allocated using xmalloc.
17171 Returns NULL if there is a problem reading the header, e.g., if it
17172 has a version we don't understand.
17174 NOTE: the strings in the include directory and file name tables of
17175 the returned object point into the dwarf line section buffer,
17176 and must not be freed. */
17178 static struct line_header
*
17179 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17181 struct cleanup
*back_to
;
17182 struct line_header
*lh
;
17183 const gdb_byte
*line_ptr
;
17184 unsigned int bytes_read
, offset_size
;
17186 const char *cur_dir
, *cur_file
;
17187 struct dwarf2_section_info
*section
;
17190 section
= get_debug_line_section (cu
);
17191 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17192 if (section
->buffer
== NULL
)
17194 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17195 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17197 complaint (&symfile_complaints
, _("missing .debug_line section"));
17201 /* We can't do this until we know the section is non-empty.
17202 Only then do we know we have such a section. */
17203 abfd
= get_section_bfd_owner (section
);
17205 /* Make sure that at least there's room for the total_length field.
17206 That could be 12 bytes long, but we're just going to fudge that. */
17207 if (offset
+ 4 >= section
->size
)
17209 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17213 lh
= xmalloc (sizeof (*lh
));
17214 memset (lh
, 0, sizeof (*lh
));
17215 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17218 lh
->offset
.sect_off
= offset
;
17219 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17221 line_ptr
= section
->buffer
+ offset
;
17223 /* Read in the header. */
17225 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17226 &bytes_read
, &offset_size
);
17227 line_ptr
+= bytes_read
;
17228 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17230 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17231 do_cleanups (back_to
);
17234 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17235 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17237 if (lh
->version
> 4)
17239 /* This is a version we don't understand. The format could have
17240 changed in ways we don't handle properly so just punt. */
17241 complaint (&symfile_complaints
,
17242 _("unsupported version in .debug_line section"));
17245 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17246 line_ptr
+= offset_size
;
17247 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17249 if (lh
->version
>= 4)
17251 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17255 lh
->maximum_ops_per_instruction
= 1;
17257 if (lh
->maximum_ops_per_instruction
== 0)
17259 lh
->maximum_ops_per_instruction
= 1;
17260 complaint (&symfile_complaints
,
17261 _("invalid maximum_ops_per_instruction "
17262 "in `.debug_line' section"));
17265 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17267 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17269 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17271 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17273 lh
->standard_opcode_lengths
17274 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
17276 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17277 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17279 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17283 /* Read directory table. */
17284 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17286 line_ptr
+= bytes_read
;
17287 add_include_dir (lh
, cur_dir
);
17289 line_ptr
+= bytes_read
;
17291 /* Read file name table. */
17292 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17294 unsigned int dir_index
, mod_time
, length
;
17296 line_ptr
+= bytes_read
;
17297 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17298 line_ptr
+= bytes_read
;
17299 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17300 line_ptr
+= bytes_read
;
17301 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17302 line_ptr
+= bytes_read
;
17304 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17306 line_ptr
+= bytes_read
;
17307 lh
->statement_program_start
= line_ptr
;
17309 if (line_ptr
> (section
->buffer
+ section
->size
))
17310 complaint (&symfile_complaints
,
17311 _("line number info header doesn't "
17312 "fit in `.debug_line' section"));
17314 discard_cleanups (back_to
);
17318 /* Subroutine of dwarf_decode_lines to simplify it.
17319 Return the file name of the psymtab for included file FILE_INDEX
17320 in line header LH of PST.
17321 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17322 If space for the result is malloc'd, it will be freed by a cleanup.
17323 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17325 The function creates dangling cleanup registration. */
17327 static const char *
17328 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17329 const struct partial_symtab
*pst
,
17330 const char *comp_dir
)
17332 const struct file_entry fe
= lh
->file_names
[file_index
];
17333 const char *include_name
= fe
.name
;
17334 const char *include_name_to_compare
= include_name
;
17335 const char *dir_name
= NULL
;
17336 const char *pst_filename
;
17337 char *copied_name
= NULL
;
17341 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17343 if (!IS_ABSOLUTE_PATH (include_name
)
17344 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17346 /* Avoid creating a duplicate psymtab for PST.
17347 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17348 Before we do the comparison, however, we need to account
17349 for DIR_NAME and COMP_DIR.
17350 First prepend dir_name (if non-NULL). If we still don't
17351 have an absolute path prepend comp_dir (if non-NULL).
17352 However, the directory we record in the include-file's
17353 psymtab does not contain COMP_DIR (to match the
17354 corresponding symtab(s)).
17359 bash$ gcc -g ./hello.c
17360 include_name = "hello.c"
17362 DW_AT_comp_dir = comp_dir = "/tmp"
17363 DW_AT_name = "./hello.c"
17367 if (dir_name
!= NULL
)
17369 char *tem
= concat (dir_name
, SLASH_STRING
,
17370 include_name
, (char *)NULL
);
17372 make_cleanup (xfree
, tem
);
17373 include_name
= tem
;
17374 include_name_to_compare
= include_name
;
17376 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17378 char *tem
= concat (comp_dir
, SLASH_STRING
,
17379 include_name
, (char *)NULL
);
17381 make_cleanup (xfree
, tem
);
17382 include_name_to_compare
= tem
;
17386 pst_filename
= pst
->filename
;
17387 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17389 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17390 pst_filename
, (char *)NULL
);
17391 pst_filename
= copied_name
;
17394 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17396 if (copied_name
!= NULL
)
17397 xfree (copied_name
);
17401 return include_name
;
17404 /* Ignore this record_line request. */
17407 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17412 /* Return non-zero if we should add LINE to the line number table.
17413 LINE is the line to add, LAST_LINE is the last line that was added,
17414 LAST_SUBFILE is the subfile for LAST_LINE.
17415 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17416 had a non-zero discriminator.
17418 We have to be careful in the presence of discriminators.
17419 E.g., for this line:
17421 for (i = 0; i < 100000; i++);
17423 clang can emit four line number entries for that one line,
17424 each with a different discriminator.
17425 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17427 However, we want gdb to coalesce all four entries into one.
17428 Otherwise the user could stepi into the middle of the line and
17429 gdb would get confused about whether the pc really was in the
17430 middle of the line.
17432 Things are further complicated by the fact that two consecutive
17433 line number entries for the same line is a heuristic used by gcc
17434 to denote the end of the prologue. So we can't just discard duplicate
17435 entries, we have to be selective about it. The heuristic we use is
17436 that we only collapse consecutive entries for the same line if at least
17437 one of those entries has a non-zero discriminator. PR 17276.
17439 Note: Addresses in the line number state machine can never go backwards
17440 within one sequence, thus this coalescing is ok. */
17443 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17444 int line_has_non_zero_discriminator
,
17445 struct subfile
*last_subfile
)
17447 if (current_subfile
!= last_subfile
)
17449 if (line
!= last_line
)
17451 /* Same line for the same file that we've seen already.
17452 As a last check, for pr 17276, only record the line if the line
17453 has never had a non-zero discriminator. */
17454 if (!line_has_non_zero_discriminator
)
17459 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17460 in the line table of subfile SUBFILE. */
17463 dwarf_record_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17464 unsigned int line
, CORE_ADDR address
,
17465 record_line_ftype p_record_line
)
17467 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17469 (*p_record_line
) (subfile
, line
, addr
);
17472 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17473 Mark the end of a set of line number records.
17474 The arguments are the same as for dwarf_record_line.
17475 If SUBFILE is NULL the request is ignored. */
17478 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17479 CORE_ADDR address
, record_line_ftype p_record_line
)
17481 if (subfile
!= NULL
)
17482 dwarf_record_line (gdbarch
, subfile
, 0, address
, p_record_line
);
17485 /* Subroutine of dwarf_decode_lines to simplify it.
17486 Process the line number information in LH. */
17489 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17490 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17492 const gdb_byte
*line_ptr
, *extended_end
;
17493 const gdb_byte
*line_end
;
17494 unsigned int bytes_read
, extended_len
;
17495 unsigned char op_code
, extended_op
;
17496 CORE_ADDR baseaddr
;
17497 struct objfile
*objfile
= cu
->objfile
;
17498 bfd
*abfd
= objfile
->obfd
;
17499 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17500 struct subfile
*last_subfile
= NULL
;
17501 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17504 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17506 line_ptr
= lh
->statement_program_start
;
17507 line_end
= lh
->statement_program_end
;
17509 /* Read the statement sequences until there's nothing left. */
17510 while (line_ptr
< line_end
)
17512 /* State machine registers. Call `gdbarch_adjust_dwarf2_line'
17513 on the initial 0 address as if there was a line entry for it
17514 so that the backend has a chance to adjust it and also record
17515 it in case it needs it. This is currently used by MIPS code,
17516 cf. `mips_adjust_dwarf2_line'. */
17517 CORE_ADDR address
= gdbarch_adjust_dwarf2_line (gdbarch
, 0, 0);
17518 unsigned int file
= 1;
17519 unsigned int line
= 1;
17520 int is_stmt
= lh
->default_is_stmt
;
17521 int end_sequence
= 0;
17522 unsigned char op_index
= 0;
17523 unsigned int discriminator
= 0;
17524 /* The last line number that was recorded, used to coalesce
17525 consecutive entries for the same line. This can happen, for
17526 example, when discriminators are present. PR 17276. */
17527 unsigned int last_line
= 0;
17528 int line_has_non_zero_discriminator
= 0;
17530 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
17532 /* Start a subfile for the current file of the state machine. */
17533 /* lh->include_dirs and lh->file_names are 0-based, but the
17534 directory and file name numbers in the statement program
17536 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17537 const char *dir
= NULL
;
17540 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17542 dwarf2_start_subfile (fe
->name
, dir
);
17545 /* Decode the table. */
17546 while (!end_sequence
)
17548 op_code
= read_1_byte (abfd
, line_ptr
);
17550 if (line_ptr
> line_end
)
17552 dwarf2_debug_line_missing_end_sequence_complaint ();
17556 if (op_code
>= lh
->opcode_base
)
17558 /* Special opcode. */
17559 unsigned char adj_opcode
;
17560 CORE_ADDR addr_adj
;
17563 adj_opcode
= op_code
- lh
->opcode_base
;
17564 addr_adj
= (((op_index
+ (adj_opcode
/ lh
->line_range
))
17565 / lh
->maximum_ops_per_instruction
)
17566 * lh
->minimum_instruction_length
);
17567 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17568 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
17569 % lh
->maximum_ops_per_instruction
);
17570 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17571 line
+= line_delta
;
17572 if (line_delta
!= 0)
17573 line_has_non_zero_discriminator
= discriminator
!= 0;
17574 if (lh
->num_file_names
< file
|| file
== 0)
17575 dwarf2_debug_line_missing_file_complaint ();
17576 /* For now we ignore lines not starting on an
17577 instruction boundary. */
17578 else if (op_index
== 0)
17580 lh
->file_names
[file
- 1].included_p
= 1;
17581 if (!decode_for_pst_p
&& is_stmt
)
17583 if (last_subfile
!= current_subfile
)
17585 dwarf_finish_line (gdbarch
, last_subfile
,
17586 address
, p_record_line
);
17588 if (dwarf_record_line_p (line
, last_line
,
17589 line_has_non_zero_discriminator
,
17592 dwarf_record_line (gdbarch
, current_subfile
,
17593 line
, address
, p_record_line
);
17595 last_subfile
= current_subfile
;
17601 else switch (op_code
)
17603 case DW_LNS_extended_op
:
17604 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17606 line_ptr
+= bytes_read
;
17607 extended_end
= line_ptr
+ extended_len
;
17608 extended_op
= read_1_byte (abfd
, line_ptr
);
17610 switch (extended_op
)
17612 case DW_LNE_end_sequence
:
17613 p_record_line
= record_line
;
17616 case DW_LNE_set_address
:
17617 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17619 /* If address < lowpc then it's not a usable value, it's
17620 outside the pc range of the CU. However, we restrict
17621 the test to only address values of zero to preserve
17622 GDB's previous behaviour which is to handle the specific
17623 case of a function being GC'd by the linker. */
17624 if (address
== 0 && address
< lowpc
)
17626 /* This line table is for a function which has been
17627 GCd by the linker. Ignore it. PR gdb/12528 */
17630 = line_ptr
- get_debug_line_section (cu
)->buffer
;
17632 complaint (&symfile_complaints
,
17633 _(".debug_line address at offset 0x%lx is 0 "
17635 line_offset
, objfile_name (objfile
));
17636 p_record_line
= noop_record_line
;
17637 /* Note: p_record_line is left as noop_record_line
17638 until we see DW_LNE_end_sequence. */
17642 line_ptr
+= bytes_read
;
17643 address
+= baseaddr
;
17644 address
= gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17646 case DW_LNE_define_file
:
17648 const char *cur_file
;
17649 unsigned int dir_index
, mod_time
, length
;
17651 cur_file
= read_direct_string (abfd
, line_ptr
,
17653 line_ptr
+= bytes_read
;
17655 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17656 line_ptr
+= bytes_read
;
17658 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17659 line_ptr
+= bytes_read
;
17661 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17662 line_ptr
+= bytes_read
;
17663 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17666 case DW_LNE_set_discriminator
:
17667 /* The discriminator is not interesting to the debugger;
17668 just ignore it. We still need to check its value though:
17669 if there are consecutive entries for the same
17670 (non-prologue) line we want to coalesce them.
17672 discriminator
= read_unsigned_leb128 (abfd
, line_ptr
,
17674 line_has_non_zero_discriminator
|= discriminator
!= 0;
17675 line_ptr
+= bytes_read
;
17678 complaint (&symfile_complaints
,
17679 _("mangled .debug_line section"));
17682 /* Make sure that we parsed the extended op correctly. If e.g.
17683 we expected a different address size than the producer used,
17684 we may have read the wrong number of bytes. */
17685 if (line_ptr
!= extended_end
)
17687 complaint (&symfile_complaints
,
17688 _("mangled .debug_line section"));
17693 if (lh
->num_file_names
< file
|| file
== 0)
17694 dwarf2_debug_line_missing_file_complaint ();
17697 lh
->file_names
[file
- 1].included_p
= 1;
17698 if (!decode_for_pst_p
&& is_stmt
)
17700 if (last_subfile
!= current_subfile
)
17702 dwarf_finish_line (gdbarch
, last_subfile
,
17703 address
, p_record_line
);
17705 if (dwarf_record_line_p (line
, last_line
,
17706 line_has_non_zero_discriminator
,
17709 dwarf_record_line (gdbarch
, current_subfile
,
17710 line
, address
, p_record_line
);
17712 last_subfile
= current_subfile
;
17718 case DW_LNS_advance_pc
:
17721 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17722 CORE_ADDR addr_adj
;
17724 addr_adj
= (((op_index
+ adjust
)
17725 / lh
->maximum_ops_per_instruction
)
17726 * lh
->minimum_instruction_length
);
17727 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17728 op_index
= ((op_index
+ adjust
)
17729 % lh
->maximum_ops_per_instruction
);
17730 line_ptr
+= bytes_read
;
17733 case DW_LNS_advance_line
:
17736 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17738 line
+= line_delta
;
17739 if (line_delta
!= 0)
17740 line_has_non_zero_discriminator
= discriminator
!= 0;
17741 line_ptr
+= bytes_read
;
17744 case DW_LNS_set_file
:
17746 /* The arrays lh->include_dirs and lh->file_names are
17747 0-based, but the directory and file name numbers in
17748 the statement program are 1-based. */
17749 struct file_entry
*fe
;
17750 const char *dir
= NULL
;
17752 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17753 line_ptr
+= bytes_read
;
17754 if (lh
->num_file_names
< file
|| file
== 0)
17755 dwarf2_debug_line_missing_file_complaint ();
17758 fe
= &lh
->file_names
[file
- 1];
17760 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17761 if (!decode_for_pst_p
)
17763 last_subfile
= current_subfile
;
17764 line_has_non_zero_discriminator
= discriminator
!= 0;
17765 dwarf2_start_subfile (fe
->name
, dir
);
17770 case DW_LNS_set_column
:
17771 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17772 line_ptr
+= bytes_read
;
17774 case DW_LNS_negate_stmt
:
17775 is_stmt
= (!is_stmt
);
17777 case DW_LNS_set_basic_block
:
17779 /* Add to the address register of the state machine the
17780 address increment value corresponding to special opcode
17781 255. I.e., this value is scaled by the minimum
17782 instruction length since special opcode 255 would have
17783 scaled the increment. */
17784 case DW_LNS_const_add_pc
:
17786 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
17787 CORE_ADDR addr_adj
;
17789 addr_adj
= (((op_index
+ adjust
)
17790 / lh
->maximum_ops_per_instruction
)
17791 * lh
->minimum_instruction_length
);
17792 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17793 op_index
= ((op_index
+ adjust
)
17794 % lh
->maximum_ops_per_instruction
);
17797 case DW_LNS_fixed_advance_pc
:
17799 CORE_ADDR addr_adj
;
17801 addr_adj
= read_2_bytes (abfd
, line_ptr
);
17802 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17809 /* Unknown standard opcode, ignore it. */
17812 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
17814 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17815 line_ptr
+= bytes_read
;
17820 if (lh
->num_file_names
< file
|| file
== 0)
17821 dwarf2_debug_line_missing_file_complaint ();
17824 lh
->file_names
[file
- 1].included_p
= 1;
17825 if (!decode_for_pst_p
)
17827 dwarf_finish_line (gdbarch
, current_subfile
, address
,
17834 /* Decode the Line Number Program (LNP) for the given line_header
17835 structure and CU. The actual information extracted and the type
17836 of structures created from the LNP depends on the value of PST.
17838 1. If PST is NULL, then this procedure uses the data from the program
17839 to create all necessary symbol tables, and their linetables.
17841 2. If PST is not NULL, this procedure reads the program to determine
17842 the list of files included by the unit represented by PST, and
17843 builds all the associated partial symbol tables.
17845 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17846 It is used for relative paths in the line table.
17847 NOTE: When processing partial symtabs (pst != NULL),
17848 comp_dir == pst->dirname.
17850 NOTE: It is important that psymtabs have the same file name (via strcmp)
17851 as the corresponding symtab. Since COMP_DIR is not used in the name of the
17852 symtab we don't use it in the name of the psymtabs we create.
17853 E.g. expand_line_sal requires this when finding psymtabs to expand.
17854 A good testcase for this is mb-inline.exp.
17856 LOWPC is the lowest address in CU (or 0 if not known).
17858 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
17859 for its PC<->lines mapping information. Otherwise only the filename
17860 table is read in. */
17863 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
17864 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
17865 CORE_ADDR lowpc
, int decode_mapping
)
17867 struct objfile
*objfile
= cu
->objfile
;
17868 const int decode_for_pst_p
= (pst
!= NULL
);
17870 if (decode_mapping
)
17871 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
17873 if (decode_for_pst_p
)
17877 /* Now that we're done scanning the Line Header Program, we can
17878 create the psymtab of each included file. */
17879 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
17880 if (lh
->file_names
[file_index
].included_p
== 1)
17882 const char *include_name
=
17883 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
17884 if (include_name
!= NULL
)
17885 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
17890 /* Make sure a symtab is created for every file, even files
17891 which contain only variables (i.e. no code with associated
17893 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
17896 for (i
= 0; i
< lh
->num_file_names
; i
++)
17898 const char *dir
= NULL
;
17899 struct file_entry
*fe
;
17901 fe
= &lh
->file_names
[i
];
17903 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17904 dwarf2_start_subfile (fe
->name
, dir
);
17906 if (current_subfile
->symtab
== NULL
)
17908 current_subfile
->symtab
17909 = allocate_symtab (cust
, current_subfile
->name
);
17911 fe
->symtab
= current_subfile
->symtab
;
17916 /* Start a subfile for DWARF. FILENAME is the name of the file and
17917 DIRNAME the name of the source directory which contains FILENAME
17918 or NULL if not known.
17919 This routine tries to keep line numbers from identical absolute and
17920 relative file names in a common subfile.
17922 Using the `list' example from the GDB testsuite, which resides in
17923 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
17924 of /srcdir/list0.c yields the following debugging information for list0.c:
17926 DW_AT_name: /srcdir/list0.c
17927 DW_AT_comp_dir: /compdir
17928 files.files[0].name: list0.h
17929 files.files[0].dir: /srcdir
17930 files.files[1].name: list0.c
17931 files.files[1].dir: /srcdir
17933 The line number information for list0.c has to end up in a single
17934 subfile, so that `break /srcdir/list0.c:1' works as expected.
17935 start_subfile will ensure that this happens provided that we pass the
17936 concatenation of files.files[1].dir and files.files[1].name as the
17940 dwarf2_start_subfile (const char *filename
, const char *dirname
)
17944 /* In order not to lose the line information directory,
17945 we concatenate it to the filename when it makes sense.
17946 Note that the Dwarf3 standard says (speaking of filenames in line
17947 information): ``The directory index is ignored for file names
17948 that represent full path names''. Thus ignoring dirname in the
17949 `else' branch below isn't an issue. */
17951 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
17953 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
17957 start_subfile (filename
);
17963 /* Start a symtab for DWARF.
17964 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
17966 static struct compunit_symtab
*
17967 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
17968 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
17970 struct compunit_symtab
*cust
17971 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
17973 record_debugformat ("DWARF 2");
17974 record_producer (cu
->producer
);
17976 /* We assume that we're processing GCC output. */
17977 processing_gcc_compilation
= 2;
17979 cu
->processing_has_namespace_info
= 0;
17985 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
17986 struct dwarf2_cu
*cu
)
17988 struct objfile
*objfile
= cu
->objfile
;
17989 struct comp_unit_head
*cu_header
= &cu
->header
;
17991 /* NOTE drow/2003-01-30: There used to be a comment and some special
17992 code here to turn a symbol with DW_AT_external and a
17993 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
17994 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
17995 with some versions of binutils) where shared libraries could have
17996 relocations against symbols in their debug information - the
17997 minimal symbol would have the right address, but the debug info
17998 would not. It's no longer necessary, because we will explicitly
17999 apply relocations when we read in the debug information now. */
18001 /* A DW_AT_location attribute with no contents indicates that a
18002 variable has been optimized away. */
18003 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
18005 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18009 /* Handle one degenerate form of location expression specially, to
18010 preserve GDB's previous behavior when section offsets are
18011 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
18012 then mark this symbol as LOC_STATIC. */
18014 if (attr_form_is_block (attr
)
18015 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
18016 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
18017 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
18018 && (DW_BLOCK (attr
)->size
18019 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
18021 unsigned int dummy
;
18023 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
18024 SYMBOL_VALUE_ADDRESS (sym
) =
18025 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
18027 SYMBOL_VALUE_ADDRESS (sym
) =
18028 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
18029 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
18030 fixup_symbol_section (sym
, objfile
);
18031 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
18032 SYMBOL_SECTION (sym
));
18036 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
18037 expression evaluator, and use LOC_COMPUTED only when necessary
18038 (i.e. when the value of a register or memory location is
18039 referenced, or a thread-local block, etc.). Then again, it might
18040 not be worthwhile. I'm assuming that it isn't unless performance
18041 or memory numbers show me otherwise. */
18043 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18045 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18046 cu
->has_loclist
= 1;
18049 /* Given a pointer to a DWARF information entry, figure out if we need
18050 to make a symbol table entry for it, and if so, create a new entry
18051 and return a pointer to it.
18052 If TYPE is NULL, determine symbol type from the die, otherwise
18053 used the passed type.
18054 If SPACE is not NULL, use it to hold the new symbol. If it is
18055 NULL, allocate a new symbol on the objfile's obstack. */
18057 static struct symbol
*
18058 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18059 struct symbol
*space
)
18061 struct objfile
*objfile
= cu
->objfile
;
18062 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18063 struct symbol
*sym
= NULL
;
18065 struct attribute
*attr
= NULL
;
18066 struct attribute
*attr2
= NULL
;
18067 CORE_ADDR baseaddr
;
18068 struct pending
**list_to_add
= NULL
;
18070 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18072 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18074 name
= dwarf2_name (die
, cu
);
18077 const char *linkagename
;
18078 int suppress_add
= 0;
18083 sym
= allocate_symbol (objfile
);
18084 OBJSTAT (objfile
, n_syms
++);
18086 /* Cache this symbol's name and the name's demangled form (if any). */
18087 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18088 linkagename
= dwarf2_physname (name
, die
, cu
);
18089 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18091 /* Fortran does not have mangling standard and the mangling does differ
18092 between gfortran, iFort etc. */
18093 if (cu
->language
== language_fortran
18094 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18095 symbol_set_demangled_name (&(sym
->ginfo
),
18096 dwarf2_full_name (name
, die
, cu
),
18099 /* Default assumptions.
18100 Use the passed type or decode it from the die. */
18101 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18102 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18104 SYMBOL_TYPE (sym
) = type
;
18106 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18107 attr
= dwarf2_attr (die
,
18108 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18112 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18115 attr
= dwarf2_attr (die
,
18116 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18120 int file_index
= DW_UNSND (attr
);
18122 if (cu
->line_header
== NULL
18123 || file_index
> cu
->line_header
->num_file_names
)
18124 complaint (&symfile_complaints
,
18125 _("file index out of range"));
18126 else if (file_index
> 0)
18128 struct file_entry
*fe
;
18130 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18131 symbol_set_symtab (sym
, fe
->symtab
);
18138 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18143 addr
= attr_value_as_address (attr
);
18144 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18145 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18147 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18148 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18149 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18150 add_symbol_to_list (sym
, cu
->list_in_scope
);
18152 case DW_TAG_subprogram
:
18153 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18155 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18156 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18157 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18158 || cu
->language
== language_ada
)
18160 /* Subprograms marked external are stored as a global symbol.
18161 Ada subprograms, whether marked external or not, are always
18162 stored as a global symbol, because we want to be able to
18163 access them globally. For instance, we want to be able
18164 to break on a nested subprogram without having to
18165 specify the context. */
18166 list_to_add
= &global_symbols
;
18170 list_to_add
= cu
->list_in_scope
;
18173 case DW_TAG_inlined_subroutine
:
18174 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18176 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18177 SYMBOL_INLINED (sym
) = 1;
18178 list_to_add
= cu
->list_in_scope
;
18180 case DW_TAG_template_value_param
:
18182 /* Fall through. */
18183 case DW_TAG_constant
:
18184 case DW_TAG_variable
:
18185 case DW_TAG_member
:
18186 /* Compilation with minimal debug info may result in
18187 variables with missing type entries. Change the
18188 misleading `void' type to something sensible. */
18189 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18191 = objfile_type (objfile
)->nodebug_data_symbol
;
18193 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18194 /* In the case of DW_TAG_member, we should only be called for
18195 static const members. */
18196 if (die
->tag
== DW_TAG_member
)
18198 /* dwarf2_add_field uses die_is_declaration,
18199 so we do the same. */
18200 gdb_assert (die_is_declaration (die
, cu
));
18205 dwarf2_const_value (attr
, sym
, cu
);
18206 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18209 if (attr2
&& (DW_UNSND (attr2
) != 0))
18210 list_to_add
= &global_symbols
;
18212 list_to_add
= cu
->list_in_scope
;
18216 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18219 var_decode_location (attr
, sym
, cu
);
18220 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18222 /* Fortran explicitly imports any global symbols to the local
18223 scope by DW_TAG_common_block. */
18224 if (cu
->language
== language_fortran
&& die
->parent
18225 && die
->parent
->tag
== DW_TAG_common_block
)
18228 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18229 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18230 && !dwarf2_per_objfile
->has_section_at_zero
)
18232 /* When a static variable is eliminated by the linker,
18233 the corresponding debug information is not stripped
18234 out, but the variable address is set to null;
18235 do not add such variables into symbol table. */
18237 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18239 /* Workaround gfortran PR debug/40040 - it uses
18240 DW_AT_location for variables in -fPIC libraries which may
18241 get overriden by other libraries/executable and get
18242 a different address. Resolve it by the minimal symbol
18243 which may come from inferior's executable using copy
18244 relocation. Make this workaround only for gfortran as for
18245 other compilers GDB cannot guess the minimal symbol
18246 Fortran mangling kind. */
18247 if (cu
->language
== language_fortran
&& die
->parent
18248 && die
->parent
->tag
== DW_TAG_module
18250 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
18251 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18253 /* A variable with DW_AT_external is never static,
18254 but it may be block-scoped. */
18255 list_to_add
= (cu
->list_in_scope
== &file_symbols
18256 ? &global_symbols
: cu
->list_in_scope
);
18259 list_to_add
= cu
->list_in_scope
;
18263 /* We do not know the address of this symbol.
18264 If it is an external symbol and we have type information
18265 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18266 The address of the variable will then be determined from
18267 the minimal symbol table whenever the variable is
18269 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18271 /* Fortran explicitly imports any global symbols to the local
18272 scope by DW_TAG_common_block. */
18273 if (cu
->language
== language_fortran
&& die
->parent
18274 && die
->parent
->tag
== DW_TAG_common_block
)
18276 /* SYMBOL_CLASS doesn't matter here because
18277 read_common_block is going to reset it. */
18279 list_to_add
= cu
->list_in_scope
;
18281 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18282 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18284 /* A variable with DW_AT_external is never static, but it
18285 may be block-scoped. */
18286 list_to_add
= (cu
->list_in_scope
== &file_symbols
18287 ? &global_symbols
: cu
->list_in_scope
);
18289 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18291 else if (!die_is_declaration (die
, cu
))
18293 /* Use the default LOC_OPTIMIZED_OUT class. */
18294 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18296 list_to_add
= cu
->list_in_scope
;
18300 case DW_TAG_formal_parameter
:
18301 /* If we are inside a function, mark this as an argument. If
18302 not, we might be looking at an argument to an inlined function
18303 when we do not have enough information to show inlined frames;
18304 pretend it's a local variable in that case so that the user can
18306 if (context_stack_depth
> 0
18307 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18308 SYMBOL_IS_ARGUMENT (sym
) = 1;
18309 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18312 var_decode_location (attr
, sym
, cu
);
18314 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18317 dwarf2_const_value (attr
, sym
, cu
);
18320 list_to_add
= cu
->list_in_scope
;
18322 case DW_TAG_unspecified_parameters
:
18323 /* From varargs functions; gdb doesn't seem to have any
18324 interest in this information, so just ignore it for now.
18327 case DW_TAG_template_type_param
:
18329 /* Fall through. */
18330 case DW_TAG_class_type
:
18331 case DW_TAG_interface_type
:
18332 case DW_TAG_structure_type
:
18333 case DW_TAG_union_type
:
18334 case DW_TAG_set_type
:
18335 case DW_TAG_enumeration_type
:
18336 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18337 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18340 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18341 really ever be static objects: otherwise, if you try
18342 to, say, break of a class's method and you're in a file
18343 which doesn't mention that class, it won't work unless
18344 the check for all static symbols in lookup_symbol_aux
18345 saves you. See the OtherFileClass tests in
18346 gdb.c++/namespace.exp. */
18350 list_to_add
= (cu
->list_in_scope
== &file_symbols
18351 && (cu
->language
== language_cplus
18352 || cu
->language
== language_java
)
18353 ? &global_symbols
: cu
->list_in_scope
);
18355 /* The semantics of C++ state that "struct foo {
18356 ... }" also defines a typedef for "foo". A Java
18357 class declaration also defines a typedef for the
18359 if (cu
->language
== language_cplus
18360 || cu
->language
== language_java
18361 || cu
->language
== language_ada
)
18363 /* The symbol's name is already allocated along
18364 with this objfile, so we don't need to
18365 duplicate it for the type. */
18366 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18367 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18372 case DW_TAG_typedef
:
18373 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18374 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18375 list_to_add
= cu
->list_in_scope
;
18377 case DW_TAG_base_type
:
18378 case DW_TAG_subrange_type
:
18379 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18380 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18381 list_to_add
= cu
->list_in_scope
;
18383 case DW_TAG_enumerator
:
18384 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18387 dwarf2_const_value (attr
, sym
, cu
);
18390 /* NOTE: carlton/2003-11-10: See comment above in the
18391 DW_TAG_class_type, etc. block. */
18393 list_to_add
= (cu
->list_in_scope
== &file_symbols
18394 && (cu
->language
== language_cplus
18395 || cu
->language
== language_java
)
18396 ? &global_symbols
: cu
->list_in_scope
);
18399 case DW_TAG_imported_declaration
:
18400 case DW_TAG_namespace
:
18401 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18402 list_to_add
= &global_symbols
;
18404 case DW_TAG_module
:
18405 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18406 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18407 list_to_add
= &global_symbols
;
18409 case DW_TAG_common_block
:
18410 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18411 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18412 add_symbol_to_list (sym
, cu
->list_in_scope
);
18415 /* Not a tag we recognize. Hopefully we aren't processing
18416 trash data, but since we must specifically ignore things
18417 we don't recognize, there is nothing else we should do at
18419 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18420 dwarf_tag_name (die
->tag
));
18426 sym
->hash_next
= objfile
->template_symbols
;
18427 objfile
->template_symbols
= sym
;
18428 list_to_add
= NULL
;
18431 if (list_to_add
!= NULL
)
18432 add_symbol_to_list (sym
, list_to_add
);
18434 /* For the benefit of old versions of GCC, check for anonymous
18435 namespaces based on the demangled name. */
18436 if (!cu
->processing_has_namespace_info
18437 && cu
->language
== language_cplus
)
18438 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18443 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18445 static struct symbol
*
18446 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18448 return new_symbol_full (die
, type
, cu
, NULL
);
18451 /* Given an attr with a DW_FORM_dataN value in host byte order,
18452 zero-extend it as appropriate for the symbol's type. The DWARF
18453 standard (v4) is not entirely clear about the meaning of using
18454 DW_FORM_dataN for a constant with a signed type, where the type is
18455 wider than the data. The conclusion of a discussion on the DWARF
18456 list was that this is unspecified. We choose to always zero-extend
18457 because that is the interpretation long in use by GCC. */
18460 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18461 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18463 struct objfile
*objfile
= cu
->objfile
;
18464 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18465 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18466 LONGEST l
= DW_UNSND (attr
);
18468 if (bits
< sizeof (*value
) * 8)
18470 l
&= ((LONGEST
) 1 << bits
) - 1;
18473 else if (bits
== sizeof (*value
) * 8)
18477 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
18478 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18485 /* Read a constant value from an attribute. Either set *VALUE, or if
18486 the value does not fit in *VALUE, set *BYTES - either already
18487 allocated on the objfile obstack, or newly allocated on OBSTACK,
18488 or, set *BATON, if we translated the constant to a location
18492 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18493 const char *name
, struct obstack
*obstack
,
18494 struct dwarf2_cu
*cu
,
18495 LONGEST
*value
, const gdb_byte
**bytes
,
18496 struct dwarf2_locexpr_baton
**baton
)
18498 struct objfile
*objfile
= cu
->objfile
;
18499 struct comp_unit_head
*cu_header
= &cu
->header
;
18500 struct dwarf_block
*blk
;
18501 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18502 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18508 switch (attr
->form
)
18511 case DW_FORM_GNU_addr_index
:
18515 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18516 dwarf2_const_value_length_mismatch_complaint (name
,
18517 cu_header
->addr_size
,
18518 TYPE_LENGTH (type
));
18519 /* Symbols of this form are reasonably rare, so we just
18520 piggyback on the existing location code rather than writing
18521 a new implementation of symbol_computed_ops. */
18522 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
18523 (*baton
)->per_cu
= cu
->per_cu
;
18524 gdb_assert ((*baton
)->per_cu
);
18526 (*baton
)->size
= 2 + cu_header
->addr_size
;
18527 data
= obstack_alloc (obstack
, (*baton
)->size
);
18528 (*baton
)->data
= data
;
18530 data
[0] = DW_OP_addr
;
18531 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18532 byte_order
, DW_ADDR (attr
));
18533 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18536 case DW_FORM_string
:
18538 case DW_FORM_GNU_str_index
:
18539 case DW_FORM_GNU_strp_alt
:
18540 /* DW_STRING is already allocated on the objfile obstack, point
18542 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18544 case DW_FORM_block1
:
18545 case DW_FORM_block2
:
18546 case DW_FORM_block4
:
18547 case DW_FORM_block
:
18548 case DW_FORM_exprloc
:
18549 blk
= DW_BLOCK (attr
);
18550 if (TYPE_LENGTH (type
) != blk
->size
)
18551 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18552 TYPE_LENGTH (type
));
18553 *bytes
= blk
->data
;
18556 /* The DW_AT_const_value attributes are supposed to carry the
18557 symbol's value "represented as it would be on the target
18558 architecture." By the time we get here, it's already been
18559 converted to host endianness, so we just need to sign- or
18560 zero-extend it as appropriate. */
18561 case DW_FORM_data1
:
18562 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18564 case DW_FORM_data2
:
18565 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18567 case DW_FORM_data4
:
18568 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18570 case DW_FORM_data8
:
18571 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18574 case DW_FORM_sdata
:
18575 *value
= DW_SND (attr
);
18578 case DW_FORM_udata
:
18579 *value
= DW_UNSND (attr
);
18583 complaint (&symfile_complaints
,
18584 _("unsupported const value attribute form: '%s'"),
18585 dwarf_form_name (attr
->form
));
18592 /* Copy constant value from an attribute to a symbol. */
18595 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18596 struct dwarf2_cu
*cu
)
18598 struct objfile
*objfile
= cu
->objfile
;
18599 struct comp_unit_head
*cu_header
= &cu
->header
;
18601 const gdb_byte
*bytes
;
18602 struct dwarf2_locexpr_baton
*baton
;
18604 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18605 SYMBOL_PRINT_NAME (sym
),
18606 &objfile
->objfile_obstack
, cu
,
18607 &value
, &bytes
, &baton
);
18611 SYMBOL_LOCATION_BATON (sym
) = baton
;
18612 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18614 else if (bytes
!= NULL
)
18616 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18617 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18621 SYMBOL_VALUE (sym
) = value
;
18622 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18626 /* Return the type of the die in question using its DW_AT_type attribute. */
18628 static struct type
*
18629 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18631 struct attribute
*type_attr
;
18633 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18636 /* A missing DW_AT_type represents a void type. */
18637 return objfile_type (cu
->objfile
)->builtin_void
;
18640 return lookup_die_type (die
, type_attr
, cu
);
18643 /* True iff CU's producer generates GNAT Ada auxiliary information
18644 that allows to find parallel types through that information instead
18645 of having to do expensive parallel lookups by type name. */
18648 need_gnat_info (struct dwarf2_cu
*cu
)
18650 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18651 of GNAT produces this auxiliary information, without any indication
18652 that it is produced. Part of enhancing the FSF version of GNAT
18653 to produce that information will be to put in place an indicator
18654 that we can use in order to determine whether the descriptive type
18655 info is available or not. One suggestion that has been made is
18656 to use a new attribute, attached to the CU die. For now, assume
18657 that the descriptive type info is not available. */
18661 /* Return the auxiliary type of the die in question using its
18662 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18663 attribute is not present. */
18665 static struct type
*
18666 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18668 struct attribute
*type_attr
;
18670 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18674 return lookup_die_type (die
, type_attr
, cu
);
18677 /* If DIE has a descriptive_type attribute, then set the TYPE's
18678 descriptive type accordingly. */
18681 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18682 struct dwarf2_cu
*cu
)
18684 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18686 if (descriptive_type
)
18688 ALLOCATE_GNAT_AUX_TYPE (type
);
18689 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18693 /* Return the containing type of the die in question using its
18694 DW_AT_containing_type attribute. */
18696 static struct type
*
18697 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18699 struct attribute
*type_attr
;
18701 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18703 error (_("Dwarf Error: Problem turning containing type into gdb type "
18704 "[in module %s]"), objfile_name (cu
->objfile
));
18706 return lookup_die_type (die
, type_attr
, cu
);
18709 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18711 static struct type
*
18712 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18714 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18715 char *message
, *saved
;
18717 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18718 objfile_name (objfile
),
18719 cu
->header
.offset
.sect_off
,
18720 die
->offset
.sect_off
);
18721 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18722 message
, strlen (message
));
18725 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18728 /* Look up the type of DIE in CU using its type attribute ATTR.
18729 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18730 DW_AT_containing_type.
18731 If there is no type substitute an error marker. */
18733 static struct type
*
18734 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18735 struct dwarf2_cu
*cu
)
18737 struct objfile
*objfile
= cu
->objfile
;
18738 struct type
*this_type
;
18740 gdb_assert (attr
->name
== DW_AT_type
18741 || attr
->name
== DW_AT_GNAT_descriptive_type
18742 || attr
->name
== DW_AT_containing_type
);
18744 /* First see if we have it cached. */
18746 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18748 struct dwarf2_per_cu_data
*per_cu
;
18749 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18751 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18752 this_type
= get_die_type_at_offset (offset
, per_cu
);
18754 else if (attr_form_is_ref (attr
))
18756 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18758 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18760 else if (attr
->form
== DW_FORM_ref_sig8
)
18762 ULONGEST signature
= DW_SIGNATURE (attr
);
18764 return get_signatured_type (die
, signature
, cu
);
18768 complaint (&symfile_complaints
,
18769 _("Dwarf Error: Bad type attribute %s in DIE"
18770 " at 0x%x [in module %s]"),
18771 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18772 objfile_name (objfile
));
18773 return build_error_marker_type (cu
, die
);
18776 /* If not cached we need to read it in. */
18778 if (this_type
== NULL
)
18780 struct die_info
*type_die
= NULL
;
18781 struct dwarf2_cu
*type_cu
= cu
;
18783 if (attr_form_is_ref (attr
))
18784 type_die
= follow_die_ref (die
, attr
, &type_cu
);
18785 if (type_die
== NULL
)
18786 return build_error_marker_type (cu
, die
);
18787 /* If we find the type now, it's probably because the type came
18788 from an inter-CU reference and the type's CU got expanded before
18790 this_type
= read_type_die (type_die
, type_cu
);
18793 /* If we still don't have a type use an error marker. */
18795 if (this_type
== NULL
)
18796 return build_error_marker_type (cu
, die
);
18801 /* Return the type in DIE, CU.
18802 Returns NULL for invalid types.
18804 This first does a lookup in die_type_hash,
18805 and only reads the die in if necessary.
18807 NOTE: This can be called when reading in partial or full symbols. */
18809 static struct type
*
18810 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
18812 struct type
*this_type
;
18814 this_type
= get_die_type (die
, cu
);
18818 return read_type_die_1 (die
, cu
);
18821 /* Read the type in DIE, CU.
18822 Returns NULL for invalid types. */
18824 static struct type
*
18825 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
18827 struct type
*this_type
= NULL
;
18831 case DW_TAG_class_type
:
18832 case DW_TAG_interface_type
:
18833 case DW_TAG_structure_type
:
18834 case DW_TAG_union_type
:
18835 this_type
= read_structure_type (die
, cu
);
18837 case DW_TAG_enumeration_type
:
18838 this_type
= read_enumeration_type (die
, cu
);
18840 case DW_TAG_subprogram
:
18841 case DW_TAG_subroutine_type
:
18842 case DW_TAG_inlined_subroutine
:
18843 this_type
= read_subroutine_type (die
, cu
);
18845 case DW_TAG_array_type
:
18846 this_type
= read_array_type (die
, cu
);
18848 case DW_TAG_set_type
:
18849 this_type
= read_set_type (die
, cu
);
18851 case DW_TAG_pointer_type
:
18852 this_type
= read_tag_pointer_type (die
, cu
);
18854 case DW_TAG_ptr_to_member_type
:
18855 this_type
= read_tag_ptr_to_member_type (die
, cu
);
18857 case DW_TAG_reference_type
:
18858 this_type
= read_tag_reference_type (die
, cu
);
18860 case DW_TAG_const_type
:
18861 this_type
= read_tag_const_type (die
, cu
);
18863 case DW_TAG_volatile_type
:
18864 this_type
= read_tag_volatile_type (die
, cu
);
18866 case DW_TAG_restrict_type
:
18867 this_type
= read_tag_restrict_type (die
, cu
);
18869 case DW_TAG_string_type
:
18870 this_type
= read_tag_string_type (die
, cu
);
18872 case DW_TAG_typedef
:
18873 this_type
= read_typedef (die
, cu
);
18875 case DW_TAG_subrange_type
:
18876 this_type
= read_subrange_type (die
, cu
);
18878 case DW_TAG_base_type
:
18879 this_type
= read_base_type (die
, cu
);
18881 case DW_TAG_unspecified_type
:
18882 this_type
= read_unspecified_type (die
, cu
);
18884 case DW_TAG_namespace
:
18885 this_type
= read_namespace_type (die
, cu
);
18887 case DW_TAG_module
:
18888 this_type
= read_module_type (die
, cu
);
18890 case DW_TAG_atomic_type
:
18891 this_type
= read_tag_atomic_type (die
, cu
);
18894 complaint (&symfile_complaints
,
18895 _("unexpected tag in read_type_die: '%s'"),
18896 dwarf_tag_name (die
->tag
));
18903 /* See if we can figure out if the class lives in a namespace. We do
18904 this by looking for a member function; its demangled name will
18905 contain namespace info, if there is any.
18906 Return the computed name or NULL.
18907 Space for the result is allocated on the objfile's obstack.
18908 This is the full-die version of guess_partial_die_structure_name.
18909 In this case we know DIE has no useful parent. */
18912 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
18914 struct die_info
*spec_die
;
18915 struct dwarf2_cu
*spec_cu
;
18916 struct die_info
*child
;
18919 spec_die
= die_specification (die
, &spec_cu
);
18920 if (spec_die
!= NULL
)
18926 for (child
= die
->child
;
18928 child
= child
->sibling
)
18930 if (child
->tag
== DW_TAG_subprogram
)
18932 struct attribute
*attr
;
18934 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
18936 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
18940 = language_class_name_from_physname (cu
->language_defn
,
18944 if (actual_name
!= NULL
)
18946 const char *die_name
= dwarf2_name (die
, cu
);
18948 if (die_name
!= NULL
18949 && strcmp (die_name
, actual_name
) != 0)
18951 /* Strip off the class name from the full name.
18952 We want the prefix. */
18953 int die_name_len
= strlen (die_name
);
18954 int actual_name_len
= strlen (actual_name
);
18956 /* Test for '::' as a sanity check. */
18957 if (actual_name_len
> die_name_len
+ 2
18958 && actual_name
[actual_name_len
18959 - die_name_len
- 1] == ':')
18961 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
18963 actual_name_len
- die_name_len
- 2);
18966 xfree (actual_name
);
18975 /* GCC might emit a nameless typedef that has a linkage name. Determine the
18976 prefix part in such case. See
18977 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18980 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18982 struct attribute
*attr
;
18985 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
18986 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
18989 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
18990 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
18993 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
18995 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
18996 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
18999 /* dwarf2_name had to be already called. */
19000 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
19002 /* Strip the base name, keep any leading namespaces/classes. */
19003 base
= strrchr (DW_STRING (attr
), ':');
19004 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
19007 return obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19008 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
19011 /* Return the name of the namespace/class that DIE is defined within,
19012 or "" if we can't tell. The caller should not xfree the result.
19014 For example, if we're within the method foo() in the following
19024 then determine_prefix on foo's die will return "N::C". */
19026 static const char *
19027 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19029 struct die_info
*parent
, *spec_die
;
19030 struct dwarf2_cu
*spec_cu
;
19031 struct type
*parent_type
;
19034 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
19035 && cu
->language
!= language_fortran
)
19038 retval
= anonymous_struct_prefix (die
, cu
);
19042 /* We have to be careful in the presence of DW_AT_specification.
19043 For example, with GCC 3.4, given the code
19047 // Definition of N::foo.
19051 then we'll have a tree of DIEs like this:
19053 1: DW_TAG_compile_unit
19054 2: DW_TAG_namespace // N
19055 3: DW_TAG_subprogram // declaration of N::foo
19056 4: DW_TAG_subprogram // definition of N::foo
19057 DW_AT_specification // refers to die #3
19059 Thus, when processing die #4, we have to pretend that we're in
19060 the context of its DW_AT_specification, namely the contex of die
19063 spec_die
= die_specification (die
, &spec_cu
);
19064 if (spec_die
== NULL
)
19065 parent
= die
->parent
;
19068 parent
= spec_die
->parent
;
19072 if (parent
== NULL
)
19074 else if (parent
->building_fullname
)
19077 const char *parent_name
;
19079 /* It has been seen on RealView 2.2 built binaries,
19080 DW_TAG_template_type_param types actually _defined_ as
19081 children of the parent class:
19084 template class <class Enum> Class{};
19085 Class<enum E> class_e;
19087 1: DW_TAG_class_type (Class)
19088 2: DW_TAG_enumeration_type (E)
19089 3: DW_TAG_enumerator (enum1:0)
19090 3: DW_TAG_enumerator (enum2:1)
19092 2: DW_TAG_template_type_param
19093 DW_AT_type DW_FORM_ref_udata (E)
19095 Besides being broken debug info, it can put GDB into an
19096 infinite loop. Consider:
19098 When we're building the full name for Class<E>, we'll start
19099 at Class, and go look over its template type parameters,
19100 finding E. We'll then try to build the full name of E, and
19101 reach here. We're now trying to build the full name of E,
19102 and look over the parent DIE for containing scope. In the
19103 broken case, if we followed the parent DIE of E, we'd again
19104 find Class, and once again go look at its template type
19105 arguments, etc., etc. Simply don't consider such parent die
19106 as source-level parent of this die (it can't be, the language
19107 doesn't allow it), and break the loop here. */
19108 name
= dwarf2_name (die
, cu
);
19109 parent_name
= dwarf2_name (parent
, cu
);
19110 complaint (&symfile_complaints
,
19111 _("template param type '%s' defined within parent '%s'"),
19112 name
? name
: "<unknown>",
19113 parent_name
? parent_name
: "<unknown>");
19117 switch (parent
->tag
)
19119 case DW_TAG_namespace
:
19120 parent_type
= read_type_die (parent
, cu
);
19121 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19122 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19123 Work around this problem here. */
19124 if (cu
->language
== language_cplus
19125 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19127 /* We give a name to even anonymous namespaces. */
19128 return TYPE_TAG_NAME (parent_type
);
19129 case DW_TAG_class_type
:
19130 case DW_TAG_interface_type
:
19131 case DW_TAG_structure_type
:
19132 case DW_TAG_union_type
:
19133 case DW_TAG_module
:
19134 parent_type
= read_type_die (parent
, cu
);
19135 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19136 return TYPE_TAG_NAME (parent_type
);
19138 /* An anonymous structure is only allowed non-static data
19139 members; no typedefs, no member functions, et cetera.
19140 So it does not need a prefix. */
19142 case DW_TAG_compile_unit
:
19143 case DW_TAG_partial_unit
:
19144 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19145 if (cu
->language
== language_cplus
19146 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19147 && die
->child
!= NULL
19148 && (die
->tag
== DW_TAG_class_type
19149 || die
->tag
== DW_TAG_structure_type
19150 || die
->tag
== DW_TAG_union_type
))
19152 char *name
= guess_full_die_structure_name (die
, cu
);
19157 case DW_TAG_enumeration_type
:
19158 parent_type
= read_type_die (parent
, cu
);
19159 if (TYPE_DECLARED_CLASS (parent_type
))
19161 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19162 return TYPE_TAG_NAME (parent_type
);
19165 /* Fall through. */
19167 return determine_prefix (parent
, cu
);
19171 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19172 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19173 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19174 an obconcat, otherwise allocate storage for the result. The CU argument is
19175 used to determine the language and hence, the appropriate separator. */
19177 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19180 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19181 int physname
, struct dwarf2_cu
*cu
)
19183 const char *lead
= "";
19186 if (suffix
== NULL
|| suffix
[0] == '\0'
19187 || prefix
== NULL
|| prefix
[0] == '\0')
19189 else if (cu
->language
== language_java
)
19191 else if (cu
->language
== language_fortran
&& physname
)
19193 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19194 DW_AT_MIPS_linkage_name is preferred and used instead. */
19202 if (prefix
== NULL
)
19204 if (suffix
== NULL
)
19210 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
19212 strcpy (retval
, lead
);
19213 strcat (retval
, prefix
);
19214 strcat (retval
, sep
);
19215 strcat (retval
, suffix
);
19220 /* We have an obstack. */
19221 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19225 /* Return sibling of die, NULL if no sibling. */
19227 static struct die_info
*
19228 sibling_die (struct die_info
*die
)
19230 return die
->sibling
;
19233 /* Get name of a die, return NULL if not found. */
19235 static const char *
19236 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19237 struct obstack
*obstack
)
19239 if (name
&& cu
->language
== language_cplus
)
19241 char *canon_name
= cp_canonicalize_string (name
);
19243 if (canon_name
!= NULL
)
19245 if (strcmp (canon_name
, name
) != 0)
19246 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
19247 xfree (canon_name
);
19254 /* Get name of a die, return NULL if not found. */
19256 static const char *
19257 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19259 struct attribute
*attr
;
19261 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19262 if ((!attr
|| !DW_STRING (attr
))
19263 && die
->tag
!= DW_TAG_class_type
19264 && die
->tag
!= DW_TAG_interface_type
19265 && die
->tag
!= DW_TAG_structure_type
19266 && die
->tag
!= DW_TAG_union_type
)
19271 case DW_TAG_compile_unit
:
19272 case DW_TAG_partial_unit
:
19273 /* Compilation units have a DW_AT_name that is a filename, not
19274 a source language identifier. */
19275 case DW_TAG_enumeration_type
:
19276 case DW_TAG_enumerator
:
19277 /* These tags always have simple identifiers already; no need
19278 to canonicalize them. */
19279 return DW_STRING (attr
);
19281 case DW_TAG_subprogram
:
19282 /* Java constructors will all be named "<init>", so return
19283 the class name when we see this special case. */
19284 if (cu
->language
== language_java
19285 && DW_STRING (attr
) != NULL
19286 && strcmp (DW_STRING (attr
), "<init>") == 0)
19288 struct dwarf2_cu
*spec_cu
= cu
;
19289 struct die_info
*spec_die
;
19291 /* GCJ will output '<init>' for Java constructor names.
19292 For this special case, return the name of the parent class. */
19294 /* GCJ may output subprogram DIEs with AT_specification set.
19295 If so, use the name of the specified DIE. */
19296 spec_die
= die_specification (die
, &spec_cu
);
19297 if (spec_die
!= NULL
)
19298 return dwarf2_name (spec_die
, spec_cu
);
19303 if (die
->tag
== DW_TAG_class_type
)
19304 return dwarf2_name (die
, cu
);
19306 while (die
->tag
!= DW_TAG_compile_unit
19307 && die
->tag
!= DW_TAG_partial_unit
);
19311 case DW_TAG_class_type
:
19312 case DW_TAG_interface_type
:
19313 case DW_TAG_structure_type
:
19314 case DW_TAG_union_type
:
19315 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19316 structures or unions. These were of the form "._%d" in GCC 4.1,
19317 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19318 and GCC 4.4. We work around this problem by ignoring these. */
19319 if (attr
&& DW_STRING (attr
)
19320 && (strncmp (DW_STRING (attr
), "._", 2) == 0
19321 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
19324 /* GCC might emit a nameless typedef that has a linkage name. See
19325 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19326 if (!attr
|| DW_STRING (attr
) == NULL
)
19328 char *demangled
= NULL
;
19330 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19332 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19334 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19337 /* Avoid demangling DW_STRING (attr) the second time on a second
19338 call for the same DIE. */
19339 if (!DW_STRING_IS_CANONICAL (attr
))
19340 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19346 /* FIXME: we already did this for the partial symbol... */
19348 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19349 demangled
, strlen (demangled
));
19350 DW_STRING_IS_CANONICAL (attr
) = 1;
19353 /* Strip any leading namespaces/classes, keep only the base name.
19354 DW_AT_name for named DIEs does not contain the prefixes. */
19355 base
= strrchr (DW_STRING (attr
), ':');
19356 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19359 return DW_STRING (attr
);
19368 if (!DW_STRING_IS_CANONICAL (attr
))
19371 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19372 &cu
->objfile
->per_bfd
->storage_obstack
);
19373 DW_STRING_IS_CANONICAL (attr
) = 1;
19375 return DW_STRING (attr
);
19378 /* Return the die that this die in an extension of, or NULL if there
19379 is none. *EXT_CU is the CU containing DIE on input, and the CU
19380 containing the return value on output. */
19382 static struct die_info
*
19383 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19385 struct attribute
*attr
;
19387 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19391 return follow_die_ref (die
, attr
, ext_cu
);
19394 /* Convert a DIE tag into its string name. */
19396 static const char *
19397 dwarf_tag_name (unsigned tag
)
19399 const char *name
= get_DW_TAG_name (tag
);
19402 return "DW_TAG_<unknown>";
19407 /* Convert a DWARF attribute code into its string name. */
19409 static const char *
19410 dwarf_attr_name (unsigned attr
)
19414 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19415 if (attr
== DW_AT_MIPS_fde
)
19416 return "DW_AT_MIPS_fde";
19418 if (attr
== DW_AT_HP_block_index
)
19419 return "DW_AT_HP_block_index";
19422 name
= get_DW_AT_name (attr
);
19425 return "DW_AT_<unknown>";
19430 /* Convert a DWARF value form code into its string name. */
19432 static const char *
19433 dwarf_form_name (unsigned form
)
19435 const char *name
= get_DW_FORM_name (form
);
19438 return "DW_FORM_<unknown>";
19444 dwarf_bool_name (unsigned mybool
)
19452 /* Convert a DWARF type code into its string name. */
19454 static const char *
19455 dwarf_type_encoding_name (unsigned enc
)
19457 const char *name
= get_DW_ATE_name (enc
);
19460 return "DW_ATE_<unknown>";
19466 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19470 print_spaces (indent
, f
);
19471 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19472 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19474 if (die
->parent
!= NULL
)
19476 print_spaces (indent
, f
);
19477 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19478 die
->parent
->offset
.sect_off
);
19481 print_spaces (indent
, f
);
19482 fprintf_unfiltered (f
, " has children: %s\n",
19483 dwarf_bool_name (die
->child
!= NULL
));
19485 print_spaces (indent
, f
);
19486 fprintf_unfiltered (f
, " attributes:\n");
19488 for (i
= 0; i
< die
->num_attrs
; ++i
)
19490 print_spaces (indent
, f
);
19491 fprintf_unfiltered (f
, " %s (%s) ",
19492 dwarf_attr_name (die
->attrs
[i
].name
),
19493 dwarf_form_name (die
->attrs
[i
].form
));
19495 switch (die
->attrs
[i
].form
)
19498 case DW_FORM_GNU_addr_index
:
19499 fprintf_unfiltered (f
, "address: ");
19500 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19502 case DW_FORM_block2
:
19503 case DW_FORM_block4
:
19504 case DW_FORM_block
:
19505 case DW_FORM_block1
:
19506 fprintf_unfiltered (f
, "block: size %s",
19507 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19509 case DW_FORM_exprloc
:
19510 fprintf_unfiltered (f
, "expression: size %s",
19511 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19513 case DW_FORM_ref_addr
:
19514 fprintf_unfiltered (f
, "ref address: ");
19515 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19517 case DW_FORM_GNU_ref_alt
:
19518 fprintf_unfiltered (f
, "alt ref address: ");
19519 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19525 case DW_FORM_ref_udata
:
19526 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19527 (long) (DW_UNSND (&die
->attrs
[i
])));
19529 case DW_FORM_data1
:
19530 case DW_FORM_data2
:
19531 case DW_FORM_data4
:
19532 case DW_FORM_data8
:
19533 case DW_FORM_udata
:
19534 case DW_FORM_sdata
:
19535 fprintf_unfiltered (f
, "constant: %s",
19536 pulongest (DW_UNSND (&die
->attrs
[i
])));
19538 case DW_FORM_sec_offset
:
19539 fprintf_unfiltered (f
, "section offset: %s",
19540 pulongest (DW_UNSND (&die
->attrs
[i
])));
19542 case DW_FORM_ref_sig8
:
19543 fprintf_unfiltered (f
, "signature: %s",
19544 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19546 case DW_FORM_string
:
19548 case DW_FORM_GNU_str_index
:
19549 case DW_FORM_GNU_strp_alt
:
19550 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19551 DW_STRING (&die
->attrs
[i
])
19552 ? DW_STRING (&die
->attrs
[i
]) : "",
19553 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19556 if (DW_UNSND (&die
->attrs
[i
]))
19557 fprintf_unfiltered (f
, "flag: TRUE");
19559 fprintf_unfiltered (f
, "flag: FALSE");
19561 case DW_FORM_flag_present
:
19562 fprintf_unfiltered (f
, "flag: TRUE");
19564 case DW_FORM_indirect
:
19565 /* The reader will have reduced the indirect form to
19566 the "base form" so this form should not occur. */
19567 fprintf_unfiltered (f
,
19568 "unexpected attribute form: DW_FORM_indirect");
19571 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19572 die
->attrs
[i
].form
);
19575 fprintf_unfiltered (f
, "\n");
19580 dump_die_for_error (struct die_info
*die
)
19582 dump_die_shallow (gdb_stderr
, 0, die
);
19586 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19588 int indent
= level
* 4;
19590 gdb_assert (die
!= NULL
);
19592 if (level
>= max_level
)
19595 dump_die_shallow (f
, indent
, die
);
19597 if (die
->child
!= NULL
)
19599 print_spaces (indent
, f
);
19600 fprintf_unfiltered (f
, " Children:");
19601 if (level
+ 1 < max_level
)
19603 fprintf_unfiltered (f
, "\n");
19604 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19608 fprintf_unfiltered (f
,
19609 " [not printed, max nesting level reached]\n");
19613 if (die
->sibling
!= NULL
&& level
> 0)
19615 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19619 /* This is called from the pdie macro in gdbinit.in.
19620 It's not static so gcc will keep a copy callable from gdb. */
19623 dump_die (struct die_info
*die
, int max_level
)
19625 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19629 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19633 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19639 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19643 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19645 sect_offset retval
= { DW_UNSND (attr
) };
19647 if (attr_form_is_ref (attr
))
19650 retval
.sect_off
= 0;
19651 complaint (&symfile_complaints
,
19652 _("unsupported die ref attribute form: '%s'"),
19653 dwarf_form_name (attr
->form
));
19657 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19658 * the value held by the attribute is not constant. */
19661 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19663 if (attr
->form
== DW_FORM_sdata
)
19664 return DW_SND (attr
);
19665 else if (attr
->form
== DW_FORM_udata
19666 || attr
->form
== DW_FORM_data1
19667 || attr
->form
== DW_FORM_data2
19668 || attr
->form
== DW_FORM_data4
19669 || attr
->form
== DW_FORM_data8
)
19670 return DW_UNSND (attr
);
19673 complaint (&symfile_complaints
,
19674 _("Attribute value is not a constant (%s)"),
19675 dwarf_form_name (attr
->form
));
19676 return default_value
;
19680 /* Follow reference or signature attribute ATTR of SRC_DIE.
19681 On entry *REF_CU is the CU of SRC_DIE.
19682 On exit *REF_CU is the CU of the result. */
19684 static struct die_info
*
19685 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19686 struct dwarf2_cu
**ref_cu
)
19688 struct die_info
*die
;
19690 if (attr_form_is_ref (attr
))
19691 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19692 else if (attr
->form
== DW_FORM_ref_sig8
)
19693 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19696 dump_die_for_error (src_die
);
19697 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19698 objfile_name ((*ref_cu
)->objfile
));
19704 /* Follow reference OFFSET.
19705 On entry *REF_CU is the CU of the source die referencing OFFSET.
19706 On exit *REF_CU is the CU of the result.
19707 Returns NULL if OFFSET is invalid. */
19709 static struct die_info
*
19710 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19711 struct dwarf2_cu
**ref_cu
)
19713 struct die_info temp_die
;
19714 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19716 gdb_assert (cu
->per_cu
!= NULL
);
19720 if (cu
->per_cu
->is_debug_types
)
19722 /* .debug_types CUs cannot reference anything outside their CU.
19723 If they need to, they have to reference a signatured type via
19724 DW_FORM_ref_sig8. */
19725 if (! offset_in_cu_p (&cu
->header
, offset
))
19728 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19729 || ! offset_in_cu_p (&cu
->header
, offset
))
19731 struct dwarf2_per_cu_data
*per_cu
;
19733 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19736 /* If necessary, add it to the queue and load its DIEs. */
19737 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19738 load_full_comp_unit (per_cu
, cu
->language
);
19740 target_cu
= per_cu
->cu
;
19742 else if (cu
->dies
== NULL
)
19744 /* We're loading full DIEs during partial symbol reading. */
19745 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19746 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19749 *ref_cu
= target_cu
;
19750 temp_die
.offset
= offset
;
19751 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19754 /* Follow reference attribute ATTR of SRC_DIE.
19755 On entry *REF_CU is the CU of SRC_DIE.
19756 On exit *REF_CU is the CU of the result. */
19758 static struct die_info
*
19759 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
19760 struct dwarf2_cu
**ref_cu
)
19762 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19763 struct dwarf2_cu
*cu
= *ref_cu
;
19764 struct die_info
*die
;
19766 die
= follow_die_offset (offset
,
19767 (attr
->form
== DW_FORM_GNU_ref_alt
19768 || cu
->per_cu
->is_dwz
),
19771 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19772 "at 0x%x [in module %s]"),
19773 offset
.sect_off
, src_die
->offset
.sect_off
,
19774 objfile_name (cu
->objfile
));
19779 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19780 Returned value is intended for DW_OP_call*. Returned
19781 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19783 struct dwarf2_locexpr_baton
19784 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
19785 struct dwarf2_per_cu_data
*per_cu
,
19786 CORE_ADDR (*get_frame_pc
) (void *baton
),
19789 struct dwarf2_cu
*cu
;
19790 struct die_info
*die
;
19791 struct attribute
*attr
;
19792 struct dwarf2_locexpr_baton retval
;
19794 dw2_setup (per_cu
->objfile
);
19796 if (per_cu
->cu
== NULL
)
19800 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19802 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19803 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19805 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19808 /* DWARF: "If there is no such attribute, then there is no effect.".
19809 DATA is ignored if SIZE is 0. */
19811 retval
.data
= NULL
;
19814 else if (attr_form_is_section_offset (attr
))
19816 struct dwarf2_loclist_baton loclist_baton
;
19817 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
19820 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
19822 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
19824 retval
.size
= size
;
19828 if (!attr_form_is_block (attr
))
19829 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
19830 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
19831 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19833 retval
.data
= DW_BLOCK (attr
)->data
;
19834 retval
.size
= DW_BLOCK (attr
)->size
;
19836 retval
.per_cu
= cu
->per_cu
;
19838 age_cached_comp_units ();
19843 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
19846 struct dwarf2_locexpr_baton
19847 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
19848 struct dwarf2_per_cu_data
*per_cu
,
19849 CORE_ADDR (*get_frame_pc
) (void *baton
),
19852 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
19854 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
19857 /* Write a constant of a given type as target-ordered bytes into
19860 static const gdb_byte
*
19861 write_constant_as_bytes (struct obstack
*obstack
,
19862 enum bfd_endian byte_order
,
19869 *len
= TYPE_LENGTH (type
);
19870 result
= obstack_alloc (obstack
, *len
);
19871 store_unsigned_integer (result
, *len
, byte_order
, value
);
19876 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
19877 pointer to the constant bytes and set LEN to the length of the
19878 data. If memory is needed, allocate it on OBSTACK. If the DIE
19879 does not have a DW_AT_const_value, return NULL. */
19882 dwarf2_fetch_constant_bytes (sect_offset offset
,
19883 struct dwarf2_per_cu_data
*per_cu
,
19884 struct obstack
*obstack
,
19887 struct dwarf2_cu
*cu
;
19888 struct die_info
*die
;
19889 struct attribute
*attr
;
19890 const gdb_byte
*result
= NULL
;
19893 enum bfd_endian byte_order
;
19895 dw2_setup (per_cu
->objfile
);
19897 if (per_cu
->cu
== NULL
)
19901 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19903 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19904 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19907 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19911 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
19912 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19914 switch (attr
->form
)
19917 case DW_FORM_GNU_addr_index
:
19921 *len
= cu
->header
.addr_size
;
19922 tem
= obstack_alloc (obstack
, *len
);
19923 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
19927 case DW_FORM_string
:
19929 case DW_FORM_GNU_str_index
:
19930 case DW_FORM_GNU_strp_alt
:
19931 /* DW_STRING is already allocated on the objfile obstack, point
19933 result
= (const gdb_byte
*) DW_STRING (attr
);
19934 *len
= strlen (DW_STRING (attr
));
19936 case DW_FORM_block1
:
19937 case DW_FORM_block2
:
19938 case DW_FORM_block4
:
19939 case DW_FORM_block
:
19940 case DW_FORM_exprloc
:
19941 result
= DW_BLOCK (attr
)->data
;
19942 *len
= DW_BLOCK (attr
)->size
;
19945 /* The DW_AT_const_value attributes are supposed to carry the
19946 symbol's value "represented as it would be on the target
19947 architecture." By the time we get here, it's already been
19948 converted to host endianness, so we just need to sign- or
19949 zero-extend it as appropriate. */
19950 case DW_FORM_data1
:
19951 type
= die_type (die
, cu
);
19952 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
19953 if (result
== NULL
)
19954 result
= write_constant_as_bytes (obstack
, byte_order
,
19957 case DW_FORM_data2
:
19958 type
= die_type (die
, cu
);
19959 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
19960 if (result
== NULL
)
19961 result
= write_constant_as_bytes (obstack
, byte_order
,
19964 case DW_FORM_data4
:
19965 type
= die_type (die
, cu
);
19966 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
19967 if (result
== NULL
)
19968 result
= write_constant_as_bytes (obstack
, byte_order
,
19971 case DW_FORM_data8
:
19972 type
= die_type (die
, cu
);
19973 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
19974 if (result
== NULL
)
19975 result
= write_constant_as_bytes (obstack
, byte_order
,
19979 case DW_FORM_sdata
:
19980 type
= die_type (die
, cu
);
19981 result
= write_constant_as_bytes (obstack
, byte_order
,
19982 type
, DW_SND (attr
), len
);
19985 case DW_FORM_udata
:
19986 type
= die_type (die
, cu
);
19987 result
= write_constant_as_bytes (obstack
, byte_order
,
19988 type
, DW_UNSND (attr
), len
);
19992 complaint (&symfile_complaints
,
19993 _("unsupported const value attribute form: '%s'"),
19994 dwarf_form_name (attr
->form
));
20001 /* Return the type of the DIE at DIE_OFFSET in the CU named by
20005 dwarf2_get_die_type (cu_offset die_offset
,
20006 struct dwarf2_per_cu_data
*per_cu
)
20008 sect_offset die_offset_sect
;
20010 dw2_setup (per_cu
->objfile
);
20012 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
20013 return get_die_type_at_offset (die_offset_sect
, per_cu
);
20016 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
20017 On entry *REF_CU is the CU of SRC_DIE.
20018 On exit *REF_CU is the CU of the result.
20019 Returns NULL if the referenced DIE isn't found. */
20021 static struct die_info
*
20022 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
20023 struct dwarf2_cu
**ref_cu
)
20025 struct objfile
*objfile
= (*ref_cu
)->objfile
;
20026 struct die_info temp_die
;
20027 struct dwarf2_cu
*sig_cu
;
20028 struct die_info
*die
;
20030 /* While it might be nice to assert sig_type->type == NULL here,
20031 we can get here for DW_AT_imported_declaration where we need
20032 the DIE not the type. */
20034 /* If necessary, add it to the queue and load its DIEs. */
20036 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
20037 read_signatured_type (sig_type
);
20039 sig_cu
= sig_type
->per_cu
.cu
;
20040 gdb_assert (sig_cu
!= NULL
);
20041 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
20042 temp_die
.offset
= sig_type
->type_offset_in_section
;
20043 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
20044 temp_die
.offset
.sect_off
);
20047 /* For .gdb_index version 7 keep track of included TUs.
20048 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20049 if (dwarf2_per_objfile
->index_table
!= NULL
20050 && dwarf2_per_objfile
->index_table
->version
<= 7)
20052 VEC_safe_push (dwarf2_per_cu_ptr
,
20053 (*ref_cu
)->per_cu
->imported_symtabs
,
20064 /* Follow signatured type referenced by ATTR in SRC_DIE.
20065 On entry *REF_CU is the CU of SRC_DIE.
20066 On exit *REF_CU is the CU of the result.
20067 The result is the DIE of the type.
20068 If the referenced type cannot be found an error is thrown. */
20070 static struct die_info
*
20071 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20072 struct dwarf2_cu
**ref_cu
)
20074 ULONGEST signature
= DW_SIGNATURE (attr
);
20075 struct signatured_type
*sig_type
;
20076 struct die_info
*die
;
20078 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20080 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20081 /* sig_type will be NULL if the signatured type is missing from
20083 if (sig_type
== NULL
)
20085 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20086 " from DIE at 0x%x [in module %s]"),
20087 hex_string (signature
), src_die
->offset
.sect_off
,
20088 objfile_name ((*ref_cu
)->objfile
));
20091 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20094 dump_die_for_error (src_die
);
20095 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20096 " from DIE at 0x%x [in module %s]"),
20097 hex_string (signature
), src_die
->offset
.sect_off
,
20098 objfile_name ((*ref_cu
)->objfile
));
20104 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20105 reading in and processing the type unit if necessary. */
20107 static struct type
*
20108 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20109 struct dwarf2_cu
*cu
)
20111 struct signatured_type
*sig_type
;
20112 struct dwarf2_cu
*type_cu
;
20113 struct die_info
*type_die
;
20116 sig_type
= lookup_signatured_type (cu
, signature
);
20117 /* sig_type will be NULL if the signatured type is missing from
20119 if (sig_type
== NULL
)
20121 complaint (&symfile_complaints
,
20122 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20123 " from DIE at 0x%x [in module %s]"),
20124 hex_string (signature
), die
->offset
.sect_off
,
20125 objfile_name (dwarf2_per_objfile
->objfile
));
20126 return build_error_marker_type (cu
, die
);
20129 /* If we already know the type we're done. */
20130 if (sig_type
->type
!= NULL
)
20131 return sig_type
->type
;
20134 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20135 if (type_die
!= NULL
)
20137 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20138 is created. This is important, for example, because for c++ classes
20139 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20140 type
= read_type_die (type_die
, type_cu
);
20143 complaint (&symfile_complaints
,
20144 _("Dwarf Error: Cannot build signatured type %s"
20145 " referenced from DIE at 0x%x [in module %s]"),
20146 hex_string (signature
), die
->offset
.sect_off
,
20147 objfile_name (dwarf2_per_objfile
->objfile
));
20148 type
= build_error_marker_type (cu
, die
);
20153 complaint (&symfile_complaints
,
20154 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20155 " from DIE at 0x%x [in module %s]"),
20156 hex_string (signature
), die
->offset
.sect_off
,
20157 objfile_name (dwarf2_per_objfile
->objfile
));
20158 type
= build_error_marker_type (cu
, die
);
20160 sig_type
->type
= type
;
20165 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20166 reading in and processing the type unit if necessary. */
20168 static struct type
*
20169 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20170 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20172 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20173 if (attr_form_is_ref (attr
))
20175 struct dwarf2_cu
*type_cu
= cu
;
20176 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20178 return read_type_die (type_die
, type_cu
);
20180 else if (attr
->form
== DW_FORM_ref_sig8
)
20182 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20186 complaint (&symfile_complaints
,
20187 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20188 " at 0x%x [in module %s]"),
20189 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20190 objfile_name (dwarf2_per_objfile
->objfile
));
20191 return build_error_marker_type (cu
, die
);
20195 /* Load the DIEs associated with type unit PER_CU into memory. */
20198 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20200 struct signatured_type
*sig_type
;
20202 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20203 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20205 /* We have the per_cu, but we need the signatured_type.
20206 Fortunately this is an easy translation. */
20207 gdb_assert (per_cu
->is_debug_types
);
20208 sig_type
= (struct signatured_type
*) per_cu
;
20210 gdb_assert (per_cu
->cu
== NULL
);
20212 read_signatured_type (sig_type
);
20214 gdb_assert (per_cu
->cu
!= NULL
);
20217 /* die_reader_func for read_signatured_type.
20218 This is identical to load_full_comp_unit_reader,
20219 but is kept separate for now. */
20222 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20223 const gdb_byte
*info_ptr
,
20224 struct die_info
*comp_unit_die
,
20228 struct dwarf2_cu
*cu
= reader
->cu
;
20230 gdb_assert (cu
->die_hash
== NULL
);
20232 htab_create_alloc_ex (cu
->header
.length
/ 12,
20236 &cu
->comp_unit_obstack
,
20237 hashtab_obstack_allocate
,
20238 dummy_obstack_deallocate
);
20241 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20242 &info_ptr
, comp_unit_die
);
20243 cu
->dies
= comp_unit_die
;
20244 /* comp_unit_die is not stored in die_hash, no need. */
20246 /* We try not to read any attributes in this function, because not
20247 all CUs needed for references have been loaded yet, and symbol
20248 table processing isn't initialized. But we have to set the CU language,
20249 or we won't be able to build types correctly.
20250 Similarly, if we do not read the producer, we can not apply
20251 producer-specific interpretation. */
20252 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20255 /* Read in a signatured type and build its CU and DIEs.
20256 If the type is a stub for the real type in a DWO file,
20257 read in the real type from the DWO file as well. */
20260 read_signatured_type (struct signatured_type
*sig_type
)
20262 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20264 gdb_assert (per_cu
->is_debug_types
);
20265 gdb_assert (per_cu
->cu
== NULL
);
20267 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20268 read_signatured_type_reader
, NULL
);
20269 sig_type
->per_cu
.tu_read
= 1;
20272 /* Decode simple location descriptions.
20273 Given a pointer to a dwarf block that defines a location, compute
20274 the location and return the value.
20276 NOTE drow/2003-11-18: This function is called in two situations
20277 now: for the address of static or global variables (partial symbols
20278 only) and for offsets into structures which are expected to be
20279 (more or less) constant. The partial symbol case should go away,
20280 and only the constant case should remain. That will let this
20281 function complain more accurately. A few special modes are allowed
20282 without complaint for global variables (for instance, global
20283 register values and thread-local values).
20285 A location description containing no operations indicates that the
20286 object is optimized out. The return value is 0 for that case.
20287 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20288 callers will only want a very basic result and this can become a
20291 Note that stack[0] is unused except as a default error return. */
20294 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20296 struct objfile
*objfile
= cu
->objfile
;
20298 size_t size
= blk
->size
;
20299 const gdb_byte
*data
= blk
->data
;
20300 CORE_ADDR stack
[64];
20302 unsigned int bytes_read
, unsnd
;
20308 stack
[++stacki
] = 0;
20347 stack
[++stacki
] = op
- DW_OP_lit0
;
20382 stack
[++stacki
] = op
- DW_OP_reg0
;
20384 dwarf2_complex_location_expr_complaint ();
20388 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20390 stack
[++stacki
] = unsnd
;
20392 dwarf2_complex_location_expr_complaint ();
20396 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20401 case DW_OP_const1u
:
20402 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20406 case DW_OP_const1s
:
20407 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20411 case DW_OP_const2u
:
20412 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20416 case DW_OP_const2s
:
20417 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20421 case DW_OP_const4u
:
20422 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20426 case DW_OP_const4s
:
20427 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20431 case DW_OP_const8u
:
20432 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20437 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20443 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20448 stack
[stacki
+ 1] = stack
[stacki
];
20453 stack
[stacki
- 1] += stack
[stacki
];
20457 case DW_OP_plus_uconst
:
20458 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20464 stack
[stacki
- 1] -= stack
[stacki
];
20469 /* If we're not the last op, then we definitely can't encode
20470 this using GDB's address_class enum. This is valid for partial
20471 global symbols, although the variable's address will be bogus
20474 dwarf2_complex_location_expr_complaint ();
20477 case DW_OP_GNU_push_tls_address
:
20478 /* The top of the stack has the offset from the beginning
20479 of the thread control block at which the variable is located. */
20480 /* Nothing should follow this operator, so the top of stack would
20482 /* This is valid for partial global symbols, but the variable's
20483 address will be bogus in the psymtab. Make it always at least
20484 non-zero to not look as a variable garbage collected by linker
20485 which have DW_OP_addr 0. */
20487 dwarf2_complex_location_expr_complaint ();
20491 case DW_OP_GNU_uninit
:
20494 case DW_OP_GNU_addr_index
:
20495 case DW_OP_GNU_const_index
:
20496 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20503 const char *name
= get_DW_OP_name (op
);
20506 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20509 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20513 return (stack
[stacki
]);
20516 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20517 outside of the allocated space. Also enforce minimum>0. */
20518 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20520 complaint (&symfile_complaints
,
20521 _("location description stack overflow"));
20527 complaint (&symfile_complaints
,
20528 _("location description stack underflow"));
20532 return (stack
[stacki
]);
20535 /* memory allocation interface */
20537 static struct dwarf_block
*
20538 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20540 struct dwarf_block
*blk
;
20542 blk
= (struct dwarf_block
*)
20543 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20547 static struct die_info
*
20548 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20550 struct die_info
*die
;
20551 size_t size
= sizeof (struct die_info
);
20554 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20556 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20557 memset (die
, 0, sizeof (struct die_info
));
20562 /* Macro support. */
20564 /* Return file name relative to the compilation directory of file number I in
20565 *LH's file name table. The result is allocated using xmalloc; the caller is
20566 responsible for freeing it. */
20569 file_file_name (int file
, struct line_header
*lh
)
20571 /* Is the file number a valid index into the line header's file name
20572 table? Remember that file numbers start with one, not zero. */
20573 if (1 <= file
&& file
<= lh
->num_file_names
)
20575 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20577 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0)
20578 return xstrdup (fe
->name
);
20579 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20584 /* The compiler produced a bogus file number. We can at least
20585 record the macro definitions made in the file, even if we
20586 won't be able to find the file by name. */
20587 char fake_name
[80];
20589 xsnprintf (fake_name
, sizeof (fake_name
),
20590 "<bad macro file number %d>", file
);
20592 complaint (&symfile_complaints
,
20593 _("bad file number in macro information (%d)"),
20596 return xstrdup (fake_name
);
20600 /* Return the full name of file number I in *LH's file name table.
20601 Use COMP_DIR as the name of the current directory of the
20602 compilation. The result is allocated using xmalloc; the caller is
20603 responsible for freeing it. */
20605 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20607 /* Is the file number a valid index into the line header's file name
20608 table? Remember that file numbers start with one, not zero. */
20609 if (1 <= file
&& file
<= lh
->num_file_names
)
20611 char *relative
= file_file_name (file
, lh
);
20613 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20615 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20618 return file_file_name (file
, lh
);
20622 static struct macro_source_file
*
20623 macro_start_file (int file
, int line
,
20624 struct macro_source_file
*current_file
,
20625 struct line_header
*lh
)
20627 /* File name relative to the compilation directory of this source file. */
20628 char *file_name
= file_file_name (file
, lh
);
20630 if (! current_file
)
20632 /* Note: We don't create a macro table for this compilation unit
20633 at all until we actually get a filename. */
20634 struct macro_table
*macro_table
= get_macro_table ();
20636 /* If we have no current file, then this must be the start_file
20637 directive for the compilation unit's main source file. */
20638 current_file
= macro_set_main (macro_table
, file_name
);
20639 macro_define_special (macro_table
);
20642 current_file
= macro_include (current_file
, line
, file_name
);
20646 return current_file
;
20650 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20651 followed by a null byte. */
20653 copy_string (const char *buf
, int len
)
20655 char *s
= xmalloc (len
+ 1);
20657 memcpy (s
, buf
, len
);
20663 static const char *
20664 consume_improper_spaces (const char *p
, const char *body
)
20668 complaint (&symfile_complaints
,
20669 _("macro definition contains spaces "
20670 "in formal argument list:\n`%s'"),
20682 parse_macro_definition (struct macro_source_file
*file
, int line
,
20687 /* The body string takes one of two forms. For object-like macro
20688 definitions, it should be:
20690 <macro name> " " <definition>
20692 For function-like macro definitions, it should be:
20694 <macro name> "() " <definition>
20696 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20698 Spaces may appear only where explicitly indicated, and in the
20701 The Dwarf 2 spec says that an object-like macro's name is always
20702 followed by a space, but versions of GCC around March 2002 omit
20703 the space when the macro's definition is the empty string.
20705 The Dwarf 2 spec says that there should be no spaces between the
20706 formal arguments in a function-like macro's formal argument list,
20707 but versions of GCC around March 2002 include spaces after the
20711 /* Find the extent of the macro name. The macro name is terminated
20712 by either a space or null character (for an object-like macro) or
20713 an opening paren (for a function-like macro). */
20714 for (p
= body
; *p
; p
++)
20715 if (*p
== ' ' || *p
== '(')
20718 if (*p
== ' ' || *p
== '\0')
20720 /* It's an object-like macro. */
20721 int name_len
= p
- body
;
20722 char *name
= copy_string (body
, name_len
);
20723 const char *replacement
;
20726 replacement
= body
+ name_len
+ 1;
20729 dwarf2_macro_malformed_definition_complaint (body
);
20730 replacement
= body
+ name_len
;
20733 macro_define_object (file
, line
, name
, replacement
);
20737 else if (*p
== '(')
20739 /* It's a function-like macro. */
20740 char *name
= copy_string (body
, p
- body
);
20743 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
20747 p
= consume_improper_spaces (p
, body
);
20749 /* Parse the formal argument list. */
20750 while (*p
&& *p
!= ')')
20752 /* Find the extent of the current argument name. */
20753 const char *arg_start
= p
;
20755 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
20758 if (! *p
|| p
== arg_start
)
20759 dwarf2_macro_malformed_definition_complaint (body
);
20762 /* Make sure argv has room for the new argument. */
20763 if (argc
>= argv_size
)
20766 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
20769 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
20772 p
= consume_improper_spaces (p
, body
);
20774 /* Consume the comma, if present. */
20779 p
= consume_improper_spaces (p
, body
);
20788 /* Perfectly formed definition, no complaints. */
20789 macro_define_function (file
, line
, name
,
20790 argc
, (const char **) argv
,
20792 else if (*p
== '\0')
20794 /* Complain, but do define it. */
20795 dwarf2_macro_malformed_definition_complaint (body
);
20796 macro_define_function (file
, line
, name
,
20797 argc
, (const char **) argv
,
20801 /* Just complain. */
20802 dwarf2_macro_malformed_definition_complaint (body
);
20805 /* Just complain. */
20806 dwarf2_macro_malformed_definition_complaint (body
);
20812 for (i
= 0; i
< argc
; i
++)
20818 dwarf2_macro_malformed_definition_complaint (body
);
20821 /* Skip some bytes from BYTES according to the form given in FORM.
20822 Returns the new pointer. */
20824 static const gdb_byte
*
20825 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
20826 enum dwarf_form form
,
20827 unsigned int offset_size
,
20828 struct dwarf2_section_info
*section
)
20830 unsigned int bytes_read
;
20834 case DW_FORM_data1
:
20839 case DW_FORM_data2
:
20843 case DW_FORM_data4
:
20847 case DW_FORM_data8
:
20851 case DW_FORM_string
:
20852 read_direct_string (abfd
, bytes
, &bytes_read
);
20853 bytes
+= bytes_read
;
20856 case DW_FORM_sec_offset
:
20858 case DW_FORM_GNU_strp_alt
:
20859 bytes
+= offset_size
;
20862 case DW_FORM_block
:
20863 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
20864 bytes
+= bytes_read
;
20867 case DW_FORM_block1
:
20868 bytes
+= 1 + read_1_byte (abfd
, bytes
);
20870 case DW_FORM_block2
:
20871 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
20873 case DW_FORM_block4
:
20874 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
20877 case DW_FORM_sdata
:
20878 case DW_FORM_udata
:
20879 case DW_FORM_GNU_addr_index
:
20880 case DW_FORM_GNU_str_index
:
20881 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
20884 dwarf2_section_buffer_overflow_complaint (section
);
20892 complaint (&symfile_complaints
,
20893 _("invalid form 0x%x in `%s'"),
20894 form
, get_section_name (section
));
20902 /* A helper for dwarf_decode_macros that handles skipping an unknown
20903 opcode. Returns an updated pointer to the macro data buffer; or,
20904 on error, issues a complaint and returns NULL. */
20906 static const gdb_byte
*
20907 skip_unknown_opcode (unsigned int opcode
,
20908 const gdb_byte
**opcode_definitions
,
20909 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20911 unsigned int offset_size
,
20912 struct dwarf2_section_info
*section
)
20914 unsigned int bytes_read
, i
;
20916 const gdb_byte
*defn
;
20918 if (opcode_definitions
[opcode
] == NULL
)
20920 complaint (&symfile_complaints
,
20921 _("unrecognized DW_MACFINO opcode 0x%x"),
20926 defn
= opcode_definitions
[opcode
];
20927 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
20928 defn
+= bytes_read
;
20930 for (i
= 0; i
< arg
; ++i
)
20932 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
20934 if (mac_ptr
== NULL
)
20936 /* skip_form_bytes already issued the complaint. */
20944 /* A helper function which parses the header of a macro section.
20945 If the macro section is the extended (for now called "GNU") type,
20946 then this updates *OFFSET_SIZE. Returns a pointer to just after
20947 the header, or issues a complaint and returns NULL on error. */
20949 static const gdb_byte
*
20950 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
20952 const gdb_byte
*mac_ptr
,
20953 unsigned int *offset_size
,
20954 int section_is_gnu
)
20956 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
20958 if (section_is_gnu
)
20960 unsigned int version
, flags
;
20962 version
= read_2_bytes (abfd
, mac_ptr
);
20965 complaint (&symfile_complaints
,
20966 _("unrecognized version `%d' in .debug_macro section"),
20972 flags
= read_1_byte (abfd
, mac_ptr
);
20974 *offset_size
= (flags
& 1) ? 8 : 4;
20976 if ((flags
& 2) != 0)
20977 /* We don't need the line table offset. */
20978 mac_ptr
+= *offset_size
;
20980 /* Vendor opcode descriptions. */
20981 if ((flags
& 4) != 0)
20983 unsigned int i
, count
;
20985 count
= read_1_byte (abfd
, mac_ptr
);
20987 for (i
= 0; i
< count
; ++i
)
20989 unsigned int opcode
, bytes_read
;
20992 opcode
= read_1_byte (abfd
, mac_ptr
);
20994 opcode_definitions
[opcode
] = mac_ptr
;
20995 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20996 mac_ptr
+= bytes_read
;
21005 /* A helper for dwarf_decode_macros that handles the GNU extensions,
21006 including DW_MACRO_GNU_transparent_include. */
21009 dwarf_decode_macro_bytes (bfd
*abfd
,
21010 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21011 struct macro_source_file
*current_file
,
21012 struct line_header
*lh
,
21013 struct dwarf2_section_info
*section
,
21014 int section_is_gnu
, int section_is_dwz
,
21015 unsigned int offset_size
,
21016 htab_t include_hash
)
21018 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21019 enum dwarf_macro_record_type macinfo_type
;
21020 int at_commandline
;
21021 const gdb_byte
*opcode_definitions
[256];
21023 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21024 &offset_size
, section_is_gnu
);
21025 if (mac_ptr
== NULL
)
21027 /* We already issued a complaint. */
21031 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
21032 GDB is still reading the definitions from command line. First
21033 DW_MACINFO_start_file will need to be ignored as it was already executed
21034 to create CURRENT_FILE for the main source holding also the command line
21035 definitions. On first met DW_MACINFO_start_file this flag is reset to
21036 normally execute all the remaining DW_MACINFO_start_file macinfos. */
21038 at_commandline
= 1;
21042 /* Do we at least have room for a macinfo type byte? */
21043 if (mac_ptr
>= mac_end
)
21045 dwarf2_section_buffer_overflow_complaint (section
);
21049 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21052 /* Note that we rely on the fact that the corresponding GNU and
21053 DWARF constants are the same. */
21054 switch (macinfo_type
)
21056 /* A zero macinfo type indicates the end of the macro
21061 case DW_MACRO_GNU_define
:
21062 case DW_MACRO_GNU_undef
:
21063 case DW_MACRO_GNU_define_indirect
:
21064 case DW_MACRO_GNU_undef_indirect
:
21065 case DW_MACRO_GNU_define_indirect_alt
:
21066 case DW_MACRO_GNU_undef_indirect_alt
:
21068 unsigned int bytes_read
;
21073 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21074 mac_ptr
+= bytes_read
;
21076 if (macinfo_type
== DW_MACRO_GNU_define
21077 || macinfo_type
== DW_MACRO_GNU_undef
)
21079 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21080 mac_ptr
+= bytes_read
;
21084 LONGEST str_offset
;
21086 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21087 mac_ptr
+= offset_size
;
21089 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21090 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21093 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21095 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21098 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21101 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21102 || macinfo_type
== DW_MACRO_GNU_define_indirect
21103 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21104 if (! current_file
)
21106 /* DWARF violation as no main source is present. */
21107 complaint (&symfile_complaints
,
21108 _("debug info with no main source gives macro %s "
21110 is_define
? _("definition") : _("undefinition"),
21114 if ((line
== 0 && !at_commandline
)
21115 || (line
!= 0 && at_commandline
))
21116 complaint (&symfile_complaints
,
21117 _("debug info gives %s macro %s with %s line %d: %s"),
21118 at_commandline
? _("command-line") : _("in-file"),
21119 is_define
? _("definition") : _("undefinition"),
21120 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21123 parse_macro_definition (current_file
, line
, body
);
21126 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21127 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21128 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21129 macro_undef (current_file
, line
, body
);
21134 case DW_MACRO_GNU_start_file
:
21136 unsigned int bytes_read
;
21139 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21140 mac_ptr
+= bytes_read
;
21141 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21142 mac_ptr
+= bytes_read
;
21144 if ((line
== 0 && !at_commandline
)
21145 || (line
!= 0 && at_commandline
))
21146 complaint (&symfile_complaints
,
21147 _("debug info gives source %d included "
21148 "from %s at %s line %d"),
21149 file
, at_commandline
? _("command-line") : _("file"),
21150 line
== 0 ? _("zero") : _("non-zero"), line
);
21152 if (at_commandline
)
21154 /* This DW_MACRO_GNU_start_file was executed in the
21156 at_commandline
= 0;
21159 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21163 case DW_MACRO_GNU_end_file
:
21164 if (! current_file
)
21165 complaint (&symfile_complaints
,
21166 _("macro debug info has an unmatched "
21167 "`close_file' directive"));
21170 current_file
= current_file
->included_by
;
21171 if (! current_file
)
21173 enum dwarf_macro_record_type next_type
;
21175 /* GCC circa March 2002 doesn't produce the zero
21176 type byte marking the end of the compilation
21177 unit. Complain if it's not there, but exit no
21180 /* Do we at least have room for a macinfo type byte? */
21181 if (mac_ptr
>= mac_end
)
21183 dwarf2_section_buffer_overflow_complaint (section
);
21187 /* We don't increment mac_ptr here, so this is just
21189 next_type
= read_1_byte (abfd
, mac_ptr
);
21190 if (next_type
!= 0)
21191 complaint (&symfile_complaints
,
21192 _("no terminating 0-type entry for "
21193 "macros in `.debug_macinfo' section"));
21200 case DW_MACRO_GNU_transparent_include
:
21201 case DW_MACRO_GNU_transparent_include_alt
:
21205 bfd
*include_bfd
= abfd
;
21206 struct dwarf2_section_info
*include_section
= section
;
21207 struct dwarf2_section_info alt_section
;
21208 const gdb_byte
*include_mac_end
= mac_end
;
21209 int is_dwz
= section_is_dwz
;
21210 const gdb_byte
*new_mac_ptr
;
21212 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21213 mac_ptr
+= offset_size
;
21215 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21217 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21219 dwarf2_read_section (objfile
, &dwz
->macro
);
21221 include_section
= &dwz
->macro
;
21222 include_bfd
= get_section_bfd_owner (include_section
);
21223 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21227 new_mac_ptr
= include_section
->buffer
+ offset
;
21228 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21232 /* This has actually happened; see
21233 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21234 complaint (&symfile_complaints
,
21235 _("recursive DW_MACRO_GNU_transparent_include in "
21236 ".debug_macro section"));
21240 *slot
= (void *) new_mac_ptr
;
21242 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21243 include_mac_end
, current_file
, lh
,
21244 section
, section_is_gnu
, is_dwz
,
21245 offset_size
, include_hash
);
21247 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21252 case DW_MACINFO_vendor_ext
:
21253 if (!section_is_gnu
)
21255 unsigned int bytes_read
;
21258 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21259 mac_ptr
+= bytes_read
;
21260 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21261 mac_ptr
+= bytes_read
;
21263 /* We don't recognize any vendor extensions. */
21269 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21270 mac_ptr
, mac_end
, abfd
, offset_size
,
21272 if (mac_ptr
== NULL
)
21276 } while (macinfo_type
!= 0);
21280 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21281 int section_is_gnu
)
21283 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21284 struct line_header
*lh
= cu
->line_header
;
21286 const gdb_byte
*mac_ptr
, *mac_end
;
21287 struct macro_source_file
*current_file
= 0;
21288 enum dwarf_macro_record_type macinfo_type
;
21289 unsigned int offset_size
= cu
->header
.offset_size
;
21290 const gdb_byte
*opcode_definitions
[256];
21291 struct cleanup
*cleanup
;
21292 htab_t include_hash
;
21294 struct dwarf2_section_info
*section
;
21295 const char *section_name
;
21297 if (cu
->dwo_unit
!= NULL
)
21299 if (section_is_gnu
)
21301 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21302 section_name
= ".debug_macro.dwo";
21306 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21307 section_name
= ".debug_macinfo.dwo";
21312 if (section_is_gnu
)
21314 section
= &dwarf2_per_objfile
->macro
;
21315 section_name
= ".debug_macro";
21319 section
= &dwarf2_per_objfile
->macinfo
;
21320 section_name
= ".debug_macinfo";
21324 dwarf2_read_section (objfile
, section
);
21325 if (section
->buffer
== NULL
)
21327 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21330 abfd
= get_section_bfd_owner (section
);
21332 /* First pass: Find the name of the base filename.
21333 This filename is needed in order to process all macros whose definition
21334 (or undefinition) comes from the command line. These macros are defined
21335 before the first DW_MACINFO_start_file entry, and yet still need to be
21336 associated to the base file.
21338 To determine the base file name, we scan the macro definitions until we
21339 reach the first DW_MACINFO_start_file entry. We then initialize
21340 CURRENT_FILE accordingly so that any macro definition found before the
21341 first DW_MACINFO_start_file can still be associated to the base file. */
21343 mac_ptr
= section
->buffer
+ offset
;
21344 mac_end
= section
->buffer
+ section
->size
;
21346 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21347 &offset_size
, section_is_gnu
);
21348 if (mac_ptr
== NULL
)
21350 /* We already issued a complaint. */
21356 /* Do we at least have room for a macinfo type byte? */
21357 if (mac_ptr
>= mac_end
)
21359 /* Complaint is printed during the second pass as GDB will probably
21360 stop the first pass earlier upon finding
21361 DW_MACINFO_start_file. */
21365 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21368 /* Note that we rely on the fact that the corresponding GNU and
21369 DWARF constants are the same. */
21370 switch (macinfo_type
)
21372 /* A zero macinfo type indicates the end of the macro
21377 case DW_MACRO_GNU_define
:
21378 case DW_MACRO_GNU_undef
:
21379 /* Only skip the data by MAC_PTR. */
21381 unsigned int bytes_read
;
21383 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21384 mac_ptr
+= bytes_read
;
21385 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21386 mac_ptr
+= bytes_read
;
21390 case DW_MACRO_GNU_start_file
:
21392 unsigned int bytes_read
;
21395 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21396 mac_ptr
+= bytes_read
;
21397 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21398 mac_ptr
+= bytes_read
;
21400 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21404 case DW_MACRO_GNU_end_file
:
21405 /* No data to skip by MAC_PTR. */
21408 case DW_MACRO_GNU_define_indirect
:
21409 case DW_MACRO_GNU_undef_indirect
:
21410 case DW_MACRO_GNU_define_indirect_alt
:
21411 case DW_MACRO_GNU_undef_indirect_alt
:
21413 unsigned int bytes_read
;
21415 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21416 mac_ptr
+= bytes_read
;
21417 mac_ptr
+= offset_size
;
21421 case DW_MACRO_GNU_transparent_include
:
21422 case DW_MACRO_GNU_transparent_include_alt
:
21423 /* Note that, according to the spec, a transparent include
21424 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21425 skip this opcode. */
21426 mac_ptr
+= offset_size
;
21429 case DW_MACINFO_vendor_ext
:
21430 /* Only skip the data by MAC_PTR. */
21431 if (!section_is_gnu
)
21433 unsigned int bytes_read
;
21435 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21436 mac_ptr
+= bytes_read
;
21437 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21438 mac_ptr
+= bytes_read
;
21443 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21444 mac_ptr
, mac_end
, abfd
, offset_size
,
21446 if (mac_ptr
== NULL
)
21450 } while (macinfo_type
!= 0 && current_file
== NULL
);
21452 /* Second pass: Process all entries.
21454 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21455 command-line macro definitions/undefinitions. This flag is unset when we
21456 reach the first DW_MACINFO_start_file entry. */
21458 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21459 NULL
, xcalloc
, xfree
);
21460 cleanup
= make_cleanup_htab_delete (include_hash
);
21461 mac_ptr
= section
->buffer
+ offset
;
21462 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21463 *slot
= (void *) mac_ptr
;
21464 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21465 current_file
, lh
, section
,
21466 section_is_gnu
, 0, offset_size
, include_hash
);
21467 do_cleanups (cleanup
);
21470 /* Check if the attribute's form is a DW_FORM_block*
21471 if so return true else false. */
21474 attr_form_is_block (const struct attribute
*attr
)
21476 return (attr
== NULL
? 0 :
21477 attr
->form
== DW_FORM_block1
21478 || attr
->form
== DW_FORM_block2
21479 || attr
->form
== DW_FORM_block4
21480 || attr
->form
== DW_FORM_block
21481 || attr
->form
== DW_FORM_exprloc
);
21484 /* Return non-zero if ATTR's value is a section offset --- classes
21485 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21486 You may use DW_UNSND (attr) to retrieve such offsets.
21488 Section 7.5.4, "Attribute Encodings", explains that no attribute
21489 may have a value that belongs to more than one of these classes; it
21490 would be ambiguous if we did, because we use the same forms for all
21494 attr_form_is_section_offset (const struct attribute
*attr
)
21496 return (attr
->form
== DW_FORM_data4
21497 || attr
->form
== DW_FORM_data8
21498 || attr
->form
== DW_FORM_sec_offset
);
21501 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21502 zero otherwise. When this function returns true, you can apply
21503 dwarf2_get_attr_constant_value to it.
21505 However, note that for some attributes you must check
21506 attr_form_is_section_offset before using this test. DW_FORM_data4
21507 and DW_FORM_data8 are members of both the constant class, and of
21508 the classes that contain offsets into other debug sections
21509 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21510 that, if an attribute's can be either a constant or one of the
21511 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21512 taken as section offsets, not constants. */
21515 attr_form_is_constant (const struct attribute
*attr
)
21517 switch (attr
->form
)
21519 case DW_FORM_sdata
:
21520 case DW_FORM_udata
:
21521 case DW_FORM_data1
:
21522 case DW_FORM_data2
:
21523 case DW_FORM_data4
:
21524 case DW_FORM_data8
:
21532 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21533 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21536 attr_form_is_ref (const struct attribute
*attr
)
21538 switch (attr
->form
)
21540 case DW_FORM_ref_addr
:
21545 case DW_FORM_ref_udata
:
21546 case DW_FORM_GNU_ref_alt
:
21553 /* Return the .debug_loc section to use for CU.
21554 For DWO files use .debug_loc.dwo. */
21556 static struct dwarf2_section_info
*
21557 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21560 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21561 return &dwarf2_per_objfile
->loc
;
21564 /* A helper function that fills in a dwarf2_loclist_baton. */
21567 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21568 struct dwarf2_loclist_baton
*baton
,
21569 const struct attribute
*attr
)
21571 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21573 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21575 baton
->per_cu
= cu
->per_cu
;
21576 gdb_assert (baton
->per_cu
);
21577 /* We don't know how long the location list is, but make sure we
21578 don't run off the edge of the section. */
21579 baton
->size
= section
->size
- DW_UNSND (attr
);
21580 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21581 baton
->base_address
= cu
->base_address
;
21582 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21586 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21587 struct dwarf2_cu
*cu
, int is_block
)
21589 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21590 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21592 if (attr_form_is_section_offset (attr
)
21593 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21594 the section. If so, fall through to the complaint in the
21596 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21598 struct dwarf2_loclist_baton
*baton
;
21600 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21601 sizeof (struct dwarf2_loclist_baton
));
21603 fill_in_loclist_baton (cu
, baton
, attr
);
21605 if (cu
->base_known
== 0)
21606 complaint (&symfile_complaints
,
21607 _("Location list used without "
21608 "specifying the CU base address."));
21610 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21611 ? dwarf2_loclist_block_index
21612 : dwarf2_loclist_index
);
21613 SYMBOL_LOCATION_BATON (sym
) = baton
;
21617 struct dwarf2_locexpr_baton
*baton
;
21619 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21620 sizeof (struct dwarf2_locexpr_baton
));
21621 baton
->per_cu
= cu
->per_cu
;
21622 gdb_assert (baton
->per_cu
);
21624 if (attr_form_is_block (attr
))
21626 /* Note that we're just copying the block's data pointer
21627 here, not the actual data. We're still pointing into the
21628 info_buffer for SYM's objfile; right now we never release
21629 that buffer, but when we do clean up properly this may
21631 baton
->size
= DW_BLOCK (attr
)->size
;
21632 baton
->data
= DW_BLOCK (attr
)->data
;
21636 dwarf2_invalid_attrib_class_complaint ("location description",
21637 SYMBOL_NATURAL_NAME (sym
));
21641 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21642 ? dwarf2_locexpr_block_index
21643 : dwarf2_locexpr_index
);
21644 SYMBOL_LOCATION_BATON (sym
) = baton
;
21648 /* Return the OBJFILE associated with the compilation unit CU. If CU
21649 came from a separate debuginfo file, then the master objfile is
21653 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21655 struct objfile
*objfile
= per_cu
->objfile
;
21657 /* Return the master objfile, so that we can report and look up the
21658 correct file containing this variable. */
21659 if (objfile
->separate_debug_objfile_backlink
)
21660 objfile
= objfile
->separate_debug_objfile_backlink
;
21665 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21666 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21667 CU_HEADERP first. */
21669 static const struct comp_unit_head
*
21670 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21671 struct dwarf2_per_cu_data
*per_cu
)
21673 const gdb_byte
*info_ptr
;
21676 return &per_cu
->cu
->header
;
21678 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21680 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21681 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21686 /* Return the address size given in the compilation unit header for CU. */
21689 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21691 struct comp_unit_head cu_header_local
;
21692 const struct comp_unit_head
*cu_headerp
;
21694 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21696 return cu_headerp
->addr_size
;
21699 /* Return the offset size given in the compilation unit header for CU. */
21702 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21704 struct comp_unit_head cu_header_local
;
21705 const struct comp_unit_head
*cu_headerp
;
21707 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21709 return cu_headerp
->offset_size
;
21712 /* See its dwarf2loc.h declaration. */
21715 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21717 struct comp_unit_head cu_header_local
;
21718 const struct comp_unit_head
*cu_headerp
;
21720 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21722 if (cu_headerp
->version
== 2)
21723 return cu_headerp
->addr_size
;
21725 return cu_headerp
->offset_size
;
21728 /* Return the text offset of the CU. The returned offset comes from
21729 this CU's objfile. If this objfile came from a separate debuginfo
21730 file, then the offset may be different from the corresponding
21731 offset in the parent objfile. */
21734 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21736 struct objfile
*objfile
= per_cu
->objfile
;
21738 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21741 /* Locate the .debug_info compilation unit from CU's objfile which contains
21742 the DIE at OFFSET. Raises an error on failure. */
21744 static struct dwarf2_per_cu_data
*
21745 dwarf2_find_containing_comp_unit (sect_offset offset
,
21746 unsigned int offset_in_dwz
,
21747 struct objfile
*objfile
)
21749 struct dwarf2_per_cu_data
*this_cu
;
21751 const sect_offset
*cu_off
;
21754 high
= dwarf2_per_objfile
->n_comp_units
- 1;
21757 struct dwarf2_per_cu_data
*mid_cu
;
21758 int mid
= low
+ (high
- low
) / 2;
21760 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
21761 cu_off
= &mid_cu
->offset
;
21762 if (mid_cu
->is_dwz
> offset_in_dwz
21763 || (mid_cu
->is_dwz
== offset_in_dwz
21764 && cu_off
->sect_off
>= offset
.sect_off
))
21769 gdb_assert (low
== high
);
21770 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21771 cu_off
= &this_cu
->offset
;
21772 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
21774 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
21775 error (_("Dwarf Error: could not find partial DIE containing "
21776 "offset 0x%lx [in module %s]"),
21777 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
21779 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
21780 <= offset
.sect_off
);
21781 return dwarf2_per_objfile
->all_comp_units
[low
-1];
21785 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21786 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
21787 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
21788 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
21789 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
21794 /* Initialize dwarf2_cu CU, owned by PER_CU. */
21797 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
21799 memset (cu
, 0, sizeof (*cu
));
21801 cu
->per_cu
= per_cu
;
21802 cu
->objfile
= per_cu
->objfile
;
21803 obstack_init (&cu
->comp_unit_obstack
);
21806 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
21809 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
21810 enum language pretend_language
)
21812 struct attribute
*attr
;
21814 /* Set the language we're debugging. */
21815 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
21817 set_cu_language (DW_UNSND (attr
), cu
);
21820 cu
->language
= pretend_language
;
21821 cu
->language_defn
= language_def (cu
->language
);
21824 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
21826 cu
->producer
= DW_STRING (attr
);
21829 /* Release one cached compilation unit, CU. We unlink it from the tree
21830 of compilation units, but we don't remove it from the read_in_chain;
21831 the caller is responsible for that.
21832 NOTE: DATA is a void * because this function is also used as a
21833 cleanup routine. */
21836 free_heap_comp_unit (void *data
)
21838 struct dwarf2_cu
*cu
= data
;
21840 gdb_assert (cu
->per_cu
!= NULL
);
21841 cu
->per_cu
->cu
= NULL
;
21844 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21849 /* This cleanup function is passed the address of a dwarf2_cu on the stack
21850 when we're finished with it. We can't free the pointer itself, but be
21851 sure to unlink it from the cache. Also release any associated storage. */
21854 free_stack_comp_unit (void *data
)
21856 struct dwarf2_cu
*cu
= data
;
21858 gdb_assert (cu
->per_cu
!= NULL
);
21859 cu
->per_cu
->cu
= NULL
;
21862 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21863 cu
->partial_dies
= NULL
;
21866 /* Free all cached compilation units. */
21869 free_cached_comp_units (void *data
)
21871 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21873 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21874 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21875 while (per_cu
!= NULL
)
21877 struct dwarf2_per_cu_data
*next_cu
;
21879 next_cu
= per_cu
->cu
->read_in_chain
;
21881 free_heap_comp_unit (per_cu
->cu
);
21882 *last_chain
= next_cu
;
21888 /* Increase the age counter on each cached compilation unit, and free
21889 any that are too old. */
21892 age_cached_comp_units (void)
21894 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21896 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
21897 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21898 while (per_cu
!= NULL
)
21900 per_cu
->cu
->last_used
++;
21901 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
21902 dwarf2_mark (per_cu
->cu
);
21903 per_cu
= per_cu
->cu
->read_in_chain
;
21906 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21907 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21908 while (per_cu
!= NULL
)
21910 struct dwarf2_per_cu_data
*next_cu
;
21912 next_cu
= per_cu
->cu
->read_in_chain
;
21914 if (!per_cu
->cu
->mark
)
21916 free_heap_comp_unit (per_cu
->cu
);
21917 *last_chain
= next_cu
;
21920 last_chain
= &per_cu
->cu
->read_in_chain
;
21926 /* Remove a single compilation unit from the cache. */
21929 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
21931 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21933 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21934 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21935 while (per_cu
!= NULL
)
21937 struct dwarf2_per_cu_data
*next_cu
;
21939 next_cu
= per_cu
->cu
->read_in_chain
;
21941 if (per_cu
== target_per_cu
)
21943 free_heap_comp_unit (per_cu
->cu
);
21945 *last_chain
= next_cu
;
21949 last_chain
= &per_cu
->cu
->read_in_chain
;
21955 /* Release all extra memory associated with OBJFILE. */
21958 dwarf2_free_objfile (struct objfile
*objfile
)
21960 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
21962 if (dwarf2_per_objfile
== NULL
)
21965 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
21966 free_cached_comp_units (NULL
);
21968 if (dwarf2_per_objfile
->quick_file_names_table
)
21969 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
21971 if (dwarf2_per_objfile
->line_header_hash
)
21972 htab_delete (dwarf2_per_objfile
->line_header_hash
);
21974 /* Everything else should be on the objfile obstack. */
21977 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
21978 We store these in a hash table separate from the DIEs, and preserve them
21979 when the DIEs are flushed out of cache.
21981 The CU "per_cu" pointer is needed because offset alone is not enough to
21982 uniquely identify the type. A file may have multiple .debug_types sections,
21983 or the type may come from a DWO file. Furthermore, while it's more logical
21984 to use per_cu->section+offset, with Fission the section with the data is in
21985 the DWO file but we don't know that section at the point we need it.
21986 We have to use something in dwarf2_per_cu_data (or the pointer to it)
21987 because we can enter the lookup routine, get_die_type_at_offset, from
21988 outside this file, and thus won't necessarily have PER_CU->cu.
21989 Fortunately, PER_CU is stable for the life of the objfile. */
21991 struct dwarf2_per_cu_offset_and_type
21993 const struct dwarf2_per_cu_data
*per_cu
;
21994 sect_offset offset
;
21998 /* Hash function for a dwarf2_per_cu_offset_and_type. */
22001 per_cu_offset_and_type_hash (const void *item
)
22003 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
22005 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
22008 /* Equality function for a dwarf2_per_cu_offset_and_type. */
22011 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
22013 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
22014 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
22016 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
22017 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
22020 /* Set the type associated with DIE to TYPE. Save it in CU's hash
22021 table if necessary. For convenience, return TYPE.
22023 The DIEs reading must have careful ordering to:
22024 * Not cause infite loops trying to read in DIEs as a prerequisite for
22025 reading current DIE.
22026 * Not trying to dereference contents of still incompletely read in types
22027 while reading in other DIEs.
22028 * Enable referencing still incompletely read in types just by a pointer to
22029 the type without accessing its fields.
22031 Therefore caller should follow these rules:
22032 * Try to fetch any prerequisite types we may need to build this DIE type
22033 before building the type and calling set_die_type.
22034 * After building type call set_die_type for current DIE as soon as
22035 possible before fetching more types to complete the current type.
22036 * Make the type as complete as possible before fetching more types. */
22038 static struct type
*
22039 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
22041 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
22042 struct objfile
*objfile
= cu
->objfile
;
22043 struct attribute
*attr
;
22044 struct dynamic_prop prop
;
22046 /* For Ada types, make sure that the gnat-specific data is always
22047 initialized (if not already set). There are a few types where
22048 we should not be doing so, because the type-specific area is
22049 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22050 where the type-specific area is used to store the floatformat).
22051 But this is not a problem, because the gnat-specific information
22052 is actually not needed for these types. */
22053 if (need_gnat_info (cu
)
22054 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22055 && TYPE_CODE (type
) != TYPE_CODE_FLT
22056 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
22057 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
22058 && TYPE_CODE (type
) != TYPE_CODE_METHOD
22059 && !HAVE_GNAT_AUX_INFO (type
))
22060 INIT_GNAT_SPECIFIC (type
);
22062 /* Read DW_AT_data_location and set in type. */
22063 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22064 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22066 TYPE_DATA_LOCATION (type
)
22067 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (prop
));
22068 *TYPE_DATA_LOCATION (type
) = prop
;
22071 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22073 dwarf2_per_objfile
->die_type_hash
=
22074 htab_create_alloc_ex (127,
22075 per_cu_offset_and_type_hash
,
22076 per_cu_offset_and_type_eq
,
22078 &objfile
->objfile_obstack
,
22079 hashtab_obstack_allocate
,
22080 dummy_obstack_deallocate
);
22083 ofs
.per_cu
= cu
->per_cu
;
22084 ofs
.offset
= die
->offset
;
22086 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22087 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22089 complaint (&symfile_complaints
,
22090 _("A problem internal to GDB: DIE 0x%x has type already set"),
22091 die
->offset
.sect_off
);
22092 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
22097 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22098 or return NULL if the die does not have a saved type. */
22100 static struct type
*
22101 get_die_type_at_offset (sect_offset offset
,
22102 struct dwarf2_per_cu_data
*per_cu
)
22104 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22106 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22109 ofs
.per_cu
= per_cu
;
22110 ofs
.offset
= offset
;
22111 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
22118 /* Look up the type for DIE in CU in die_type_hash,
22119 or return NULL if DIE does not have a saved type. */
22121 static struct type
*
22122 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22124 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22127 /* Add a dependence relationship from CU to REF_PER_CU. */
22130 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22131 struct dwarf2_per_cu_data
*ref_per_cu
)
22135 if (cu
->dependencies
== NULL
)
22137 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22138 NULL
, &cu
->comp_unit_obstack
,
22139 hashtab_obstack_allocate
,
22140 dummy_obstack_deallocate
);
22142 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22144 *slot
= ref_per_cu
;
22147 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22148 Set the mark field in every compilation unit in the
22149 cache that we must keep because we are keeping CU. */
22152 dwarf2_mark_helper (void **slot
, void *data
)
22154 struct dwarf2_per_cu_data
*per_cu
;
22156 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22158 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22159 reading of the chain. As such dependencies remain valid it is not much
22160 useful to track and undo them during QUIT cleanups. */
22161 if (per_cu
->cu
== NULL
)
22164 if (per_cu
->cu
->mark
)
22166 per_cu
->cu
->mark
= 1;
22168 if (per_cu
->cu
->dependencies
!= NULL
)
22169 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22174 /* Set the mark field in CU and in every other compilation unit in the
22175 cache that we must keep because we are keeping CU. */
22178 dwarf2_mark (struct dwarf2_cu
*cu
)
22183 if (cu
->dependencies
!= NULL
)
22184 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22188 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22192 per_cu
->cu
->mark
= 0;
22193 per_cu
= per_cu
->cu
->read_in_chain
;
22197 /* Trivial hash function for partial_die_info: the hash value of a DIE
22198 is its offset in .debug_info for this objfile. */
22201 partial_die_hash (const void *item
)
22203 const struct partial_die_info
*part_die
= item
;
22205 return part_die
->offset
.sect_off
;
22208 /* Trivial comparison function for partial_die_info structures: two DIEs
22209 are equal if they have the same offset. */
22212 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22214 const struct partial_die_info
*part_die_lhs
= item_lhs
;
22215 const struct partial_die_info
*part_die_rhs
= item_rhs
;
22217 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22220 static struct cmd_list_element
*set_dwarf2_cmdlist
;
22221 static struct cmd_list_element
*show_dwarf2_cmdlist
;
22224 set_dwarf2_cmd (char *args
, int from_tty
)
22226 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", all_commands
,
22231 show_dwarf2_cmd (char *args
, int from_tty
)
22233 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
22236 /* Free data associated with OBJFILE, if necessary. */
22239 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22241 struct dwarf2_per_objfile
*data
= d
;
22244 /* Make sure we don't accidentally use dwarf2_per_objfile while
22246 dwarf2_per_objfile
= NULL
;
22248 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22249 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22251 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22252 VEC_free (dwarf2_per_cu_ptr
,
22253 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22254 xfree (data
->all_type_units
);
22256 VEC_free (dwarf2_section_info_def
, data
->types
);
22258 if (data
->dwo_files
)
22259 free_dwo_files (data
->dwo_files
, objfile
);
22260 if (data
->dwp_file
)
22261 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22263 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22264 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22268 /* The "save gdb-index" command. */
22270 /* The contents of the hash table we create when building the string
22272 struct strtab_entry
22274 offset_type offset
;
22278 /* Hash function for a strtab_entry.
22280 Function is used only during write_hash_table so no index format backward
22281 compatibility is needed. */
22284 hash_strtab_entry (const void *e
)
22286 const struct strtab_entry
*entry
= e
;
22287 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22290 /* Equality function for a strtab_entry. */
22293 eq_strtab_entry (const void *a
, const void *b
)
22295 const struct strtab_entry
*ea
= a
;
22296 const struct strtab_entry
*eb
= b
;
22297 return !strcmp (ea
->str
, eb
->str
);
22300 /* Create a strtab_entry hash table. */
22303 create_strtab (void)
22305 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22306 xfree
, xcalloc
, xfree
);
22309 /* Add a string to the constant pool. Return the string's offset in
22313 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22316 struct strtab_entry entry
;
22317 struct strtab_entry
*result
;
22320 slot
= htab_find_slot (table
, &entry
, INSERT
);
22325 result
= XNEW (struct strtab_entry
);
22326 result
->offset
= obstack_object_size (cpool
);
22328 obstack_grow_str0 (cpool
, str
);
22331 return result
->offset
;
22334 /* An entry in the symbol table. */
22335 struct symtab_index_entry
22337 /* The name of the symbol. */
22339 /* The offset of the name in the constant pool. */
22340 offset_type index_offset
;
22341 /* A sorted vector of the indices of all the CUs that hold an object
22343 VEC (offset_type
) *cu_indices
;
22346 /* The symbol table. This is a power-of-2-sized hash table. */
22347 struct mapped_symtab
22349 offset_type n_elements
;
22351 struct symtab_index_entry
**data
;
22354 /* Hash function for a symtab_index_entry. */
22357 hash_symtab_entry (const void *e
)
22359 const struct symtab_index_entry
*entry
= e
;
22360 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22361 sizeof (offset_type
) * VEC_length (offset_type
,
22362 entry
->cu_indices
),
22366 /* Equality function for a symtab_index_entry. */
22369 eq_symtab_entry (const void *a
, const void *b
)
22371 const struct symtab_index_entry
*ea
= a
;
22372 const struct symtab_index_entry
*eb
= b
;
22373 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22374 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22376 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22377 VEC_address (offset_type
, eb
->cu_indices
),
22378 sizeof (offset_type
) * len
);
22381 /* Destroy a symtab_index_entry. */
22384 delete_symtab_entry (void *p
)
22386 struct symtab_index_entry
*entry
= p
;
22387 VEC_free (offset_type
, entry
->cu_indices
);
22391 /* Create a hash table holding symtab_index_entry objects. */
22394 create_symbol_hash_table (void)
22396 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22397 delete_symtab_entry
, xcalloc
, xfree
);
22400 /* Create a new mapped symtab object. */
22402 static struct mapped_symtab
*
22403 create_mapped_symtab (void)
22405 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22406 symtab
->n_elements
= 0;
22407 symtab
->size
= 1024;
22408 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22412 /* Destroy a mapped_symtab. */
22415 cleanup_mapped_symtab (void *p
)
22417 struct mapped_symtab
*symtab
= p
;
22418 /* The contents of the array are freed when the other hash table is
22420 xfree (symtab
->data
);
22424 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22427 Function is used only during write_hash_table so no index format backward
22428 compatibility is needed. */
22430 static struct symtab_index_entry
**
22431 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22433 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22435 index
= hash
& (symtab
->size
- 1);
22436 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22440 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22441 return &symtab
->data
[index
];
22442 index
= (index
+ step
) & (symtab
->size
- 1);
22446 /* Expand SYMTAB's hash table. */
22449 hash_expand (struct mapped_symtab
*symtab
)
22451 offset_type old_size
= symtab
->size
;
22453 struct symtab_index_entry
**old_entries
= symtab
->data
;
22456 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22458 for (i
= 0; i
< old_size
; ++i
)
22460 if (old_entries
[i
])
22462 struct symtab_index_entry
**slot
= find_slot (symtab
,
22463 old_entries
[i
]->name
);
22464 *slot
= old_entries
[i
];
22468 xfree (old_entries
);
22471 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22472 CU_INDEX is the index of the CU in which the symbol appears.
22473 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22476 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22477 int is_static
, gdb_index_symbol_kind kind
,
22478 offset_type cu_index
)
22480 struct symtab_index_entry
**slot
;
22481 offset_type cu_index_and_attrs
;
22483 ++symtab
->n_elements
;
22484 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22485 hash_expand (symtab
);
22487 slot
= find_slot (symtab
, name
);
22490 *slot
= XNEW (struct symtab_index_entry
);
22491 (*slot
)->name
= name
;
22492 /* index_offset is set later. */
22493 (*slot
)->cu_indices
= NULL
;
22496 cu_index_and_attrs
= 0;
22497 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22498 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22499 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22501 /* We don't want to record an index value twice as we want to avoid the
22503 We process all global symbols and then all static symbols
22504 (which would allow us to avoid the duplication by only having to check
22505 the last entry pushed), but a symbol could have multiple kinds in one CU.
22506 To keep things simple we don't worry about the duplication here and
22507 sort and uniqufy the list after we've processed all symbols. */
22508 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22511 /* qsort helper routine for uniquify_cu_indices. */
22514 offset_type_compare (const void *ap
, const void *bp
)
22516 offset_type a
= *(offset_type
*) ap
;
22517 offset_type b
= *(offset_type
*) bp
;
22519 return (a
> b
) - (b
> a
);
22522 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22525 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22529 for (i
= 0; i
< symtab
->size
; ++i
)
22531 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22534 && entry
->cu_indices
!= NULL
)
22536 unsigned int next_to_insert
, next_to_check
;
22537 offset_type last_value
;
22539 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22540 VEC_length (offset_type
, entry
->cu_indices
),
22541 sizeof (offset_type
), offset_type_compare
);
22543 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22544 next_to_insert
= 1;
22545 for (next_to_check
= 1;
22546 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22549 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22552 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22554 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22559 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22564 /* Add a vector of indices to the constant pool. */
22567 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22568 struct symtab_index_entry
*entry
)
22572 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22575 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22576 offset_type val
= MAYBE_SWAP (len
);
22581 entry
->index_offset
= obstack_object_size (cpool
);
22583 obstack_grow (cpool
, &val
, sizeof (val
));
22585 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22588 val
= MAYBE_SWAP (iter
);
22589 obstack_grow (cpool
, &val
, sizeof (val
));
22594 struct symtab_index_entry
*old_entry
= *slot
;
22595 entry
->index_offset
= old_entry
->index_offset
;
22598 return entry
->index_offset
;
22601 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22602 constant pool entries going into the obstack CPOOL. */
22605 write_hash_table (struct mapped_symtab
*symtab
,
22606 struct obstack
*output
, struct obstack
*cpool
)
22609 htab_t symbol_hash_table
;
22612 symbol_hash_table
= create_symbol_hash_table ();
22613 str_table
= create_strtab ();
22615 /* We add all the index vectors to the constant pool first, to
22616 ensure alignment is ok. */
22617 for (i
= 0; i
< symtab
->size
; ++i
)
22619 if (symtab
->data
[i
])
22620 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22623 /* Now write out the hash table. */
22624 for (i
= 0; i
< symtab
->size
; ++i
)
22626 offset_type str_off
, vec_off
;
22628 if (symtab
->data
[i
])
22630 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22631 vec_off
= symtab
->data
[i
]->index_offset
;
22635 /* While 0 is a valid constant pool index, it is not valid
22636 to have 0 for both offsets. */
22641 str_off
= MAYBE_SWAP (str_off
);
22642 vec_off
= MAYBE_SWAP (vec_off
);
22644 obstack_grow (output
, &str_off
, sizeof (str_off
));
22645 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22648 htab_delete (str_table
);
22649 htab_delete (symbol_hash_table
);
22652 /* Struct to map psymtab to CU index in the index file. */
22653 struct psymtab_cu_index_map
22655 struct partial_symtab
*psymtab
;
22656 unsigned int cu_index
;
22660 hash_psymtab_cu_index (const void *item
)
22662 const struct psymtab_cu_index_map
*map
= item
;
22664 return htab_hash_pointer (map
->psymtab
);
22668 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22670 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22671 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22673 return lhs
->psymtab
== rhs
->psymtab
;
22676 /* Helper struct for building the address table. */
22677 struct addrmap_index_data
22679 struct objfile
*objfile
;
22680 struct obstack
*addr_obstack
;
22681 htab_t cu_index_htab
;
22683 /* Non-zero if the previous_* fields are valid.
22684 We can't write an entry until we see the next entry (since it is only then
22685 that we know the end of the entry). */
22686 int previous_valid
;
22687 /* Index of the CU in the table of all CUs in the index file. */
22688 unsigned int previous_cu_index
;
22689 /* Start address of the CU. */
22690 CORE_ADDR previous_cu_start
;
22693 /* Write an address entry to OBSTACK. */
22696 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22697 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22699 offset_type cu_index_to_write
;
22701 CORE_ADDR baseaddr
;
22703 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22705 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22706 obstack_grow (obstack
, addr
, 8);
22707 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22708 obstack_grow (obstack
, addr
, 8);
22709 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22710 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22713 /* Worker function for traversing an addrmap to build the address table. */
22716 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22718 struct addrmap_index_data
*data
= datap
;
22719 struct partial_symtab
*pst
= obj
;
22721 if (data
->previous_valid
)
22722 add_address_entry (data
->objfile
, data
->addr_obstack
,
22723 data
->previous_cu_start
, start_addr
,
22724 data
->previous_cu_index
);
22726 data
->previous_cu_start
= start_addr
;
22729 struct psymtab_cu_index_map find_map
, *map
;
22730 find_map
.psymtab
= pst
;
22731 map
= htab_find (data
->cu_index_htab
, &find_map
);
22732 gdb_assert (map
!= NULL
);
22733 data
->previous_cu_index
= map
->cu_index
;
22734 data
->previous_valid
= 1;
22737 data
->previous_valid
= 0;
22742 /* Write OBJFILE's address map to OBSTACK.
22743 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22744 in the index file. */
22747 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
22748 htab_t cu_index_htab
)
22750 struct addrmap_index_data addrmap_index_data
;
22752 /* When writing the address table, we have to cope with the fact that
22753 the addrmap iterator only provides the start of a region; we have to
22754 wait until the next invocation to get the start of the next region. */
22756 addrmap_index_data
.objfile
= objfile
;
22757 addrmap_index_data
.addr_obstack
= obstack
;
22758 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
22759 addrmap_index_data
.previous_valid
= 0;
22761 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
22762 &addrmap_index_data
);
22764 /* It's highly unlikely the last entry (end address = 0xff...ff)
22765 is valid, but we should still handle it.
22766 The end address is recorded as the start of the next region, but that
22767 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22769 if (addrmap_index_data
.previous_valid
)
22770 add_address_entry (objfile
, obstack
,
22771 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
22772 addrmap_index_data
.previous_cu_index
);
22775 /* Return the symbol kind of PSYM. */
22777 static gdb_index_symbol_kind
22778 symbol_kind (struct partial_symbol
*psym
)
22780 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
22781 enum address_class aclass
= PSYMBOL_CLASS (psym
);
22789 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
22791 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22793 case LOC_CONST_BYTES
:
22794 case LOC_OPTIMIZED_OUT
:
22796 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22798 /* Note: It's currently impossible to recognize psyms as enum values
22799 short of reading the type info. For now punt. */
22800 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22802 /* There are other LOC_FOO values that one might want to classify
22803 as variables, but dwarf2read.c doesn't currently use them. */
22804 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22806 case STRUCT_DOMAIN
:
22807 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22809 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22813 /* Add a list of partial symbols to SYMTAB. */
22816 write_psymbols (struct mapped_symtab
*symtab
,
22818 struct partial_symbol
**psymp
,
22820 offset_type cu_index
,
22823 for (; count
-- > 0; ++psymp
)
22825 struct partial_symbol
*psym
= *psymp
;
22828 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
22829 error (_("Ada is not currently supported by the index"));
22831 /* Only add a given psymbol once. */
22832 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
22835 gdb_index_symbol_kind kind
= symbol_kind (psym
);
22838 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
22839 is_static
, kind
, cu_index
);
22844 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
22845 exception if there is an error. */
22848 write_obstack (FILE *file
, struct obstack
*obstack
)
22850 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
22852 != obstack_object_size (obstack
))
22853 error (_("couldn't data write to file"));
22856 /* Unlink a file if the argument is not NULL. */
22859 unlink_if_set (void *p
)
22861 char **filename
= p
;
22863 unlink (*filename
);
22866 /* A helper struct used when iterating over debug_types. */
22867 struct signatured_type_index_data
22869 struct objfile
*objfile
;
22870 struct mapped_symtab
*symtab
;
22871 struct obstack
*types_list
;
22876 /* A helper function that writes a single signatured_type to an
22880 write_one_signatured_type (void **slot
, void *d
)
22882 struct signatured_type_index_data
*info
= d
;
22883 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
22884 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
22887 write_psymbols (info
->symtab
,
22889 info
->objfile
->global_psymbols
.list
22890 + psymtab
->globals_offset
,
22891 psymtab
->n_global_syms
, info
->cu_index
,
22893 write_psymbols (info
->symtab
,
22895 info
->objfile
->static_psymbols
.list
22896 + psymtab
->statics_offset
,
22897 psymtab
->n_static_syms
, info
->cu_index
,
22900 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22901 entry
->per_cu
.offset
.sect_off
);
22902 obstack_grow (info
->types_list
, val
, 8);
22903 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22904 entry
->type_offset_in_tu
.cu_off
);
22905 obstack_grow (info
->types_list
, val
, 8);
22906 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
22907 obstack_grow (info
->types_list
, val
, 8);
22914 /* Recurse into all "included" dependencies and write their symbols as
22915 if they appeared in this psymtab. */
22918 recursively_write_psymbols (struct objfile
*objfile
,
22919 struct partial_symtab
*psymtab
,
22920 struct mapped_symtab
*symtab
,
22922 offset_type cu_index
)
22926 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
22927 if (psymtab
->dependencies
[i
]->user
!= NULL
)
22928 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
22929 symtab
, psyms_seen
, cu_index
);
22931 write_psymbols (symtab
,
22933 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
22934 psymtab
->n_global_syms
, cu_index
,
22936 write_psymbols (symtab
,
22938 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
22939 psymtab
->n_static_syms
, cu_index
,
22943 /* Create an index file for OBJFILE in the directory DIR. */
22946 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
22948 struct cleanup
*cleanup
;
22949 char *filename
, *cleanup_filename
;
22950 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
22951 struct obstack cu_list
, types_cu_list
;
22954 struct mapped_symtab
*symtab
;
22955 offset_type val
, size_of_contents
, total_len
;
22958 htab_t cu_index_htab
;
22959 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
22961 if (dwarf2_per_objfile
->using_index
)
22962 error (_("Cannot use an index to create the index"));
22964 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
22965 error (_("Cannot make an index when the file has multiple .debug_types sections"));
22967 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
22970 if (stat (objfile_name (objfile
), &st
) < 0)
22971 perror_with_name (objfile_name (objfile
));
22973 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
22974 INDEX_SUFFIX
, (char *) NULL
);
22975 cleanup
= make_cleanup (xfree
, filename
);
22977 out_file
= gdb_fopen_cloexec (filename
, "wb");
22979 error (_("Can't open `%s' for writing"), filename
);
22981 cleanup_filename
= filename
;
22982 make_cleanup (unlink_if_set
, &cleanup_filename
);
22984 symtab
= create_mapped_symtab ();
22985 make_cleanup (cleanup_mapped_symtab
, symtab
);
22987 obstack_init (&addr_obstack
);
22988 make_cleanup_obstack_free (&addr_obstack
);
22990 obstack_init (&cu_list
);
22991 make_cleanup_obstack_free (&cu_list
);
22993 obstack_init (&types_cu_list
);
22994 make_cleanup_obstack_free (&types_cu_list
);
22996 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
22997 NULL
, xcalloc
, xfree
);
22998 make_cleanup_htab_delete (psyms_seen
);
23000 /* While we're scanning CU's create a table that maps a psymtab pointer
23001 (which is what addrmap records) to its index (which is what is recorded
23002 in the index file). This will later be needed to write the address
23004 cu_index_htab
= htab_create_alloc (100,
23005 hash_psymtab_cu_index
,
23006 eq_psymtab_cu_index
,
23007 NULL
, xcalloc
, xfree
);
23008 make_cleanup_htab_delete (cu_index_htab
);
23009 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
23010 xmalloc (sizeof (struct psymtab_cu_index_map
)
23011 * dwarf2_per_objfile
->n_comp_units
);
23012 make_cleanup (xfree
, psymtab_cu_index_map
);
23014 /* The CU list is already sorted, so we don't need to do additional
23015 work here. Also, the debug_types entries do not appear in
23016 all_comp_units, but only in their own hash table. */
23017 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23019 struct dwarf2_per_cu_data
*per_cu
23020 = dwarf2_per_objfile
->all_comp_units
[i
];
23021 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23023 struct psymtab_cu_index_map
*map
;
23026 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23027 It may be referenced from a local scope but in such case it does not
23028 need to be present in .gdb_index. */
23029 if (psymtab
== NULL
)
23032 if (psymtab
->user
== NULL
)
23033 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
23035 map
= &psymtab_cu_index_map
[i
];
23036 map
->psymtab
= psymtab
;
23038 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
23039 gdb_assert (slot
!= NULL
);
23040 gdb_assert (*slot
== NULL
);
23043 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
23044 per_cu
->offset
.sect_off
);
23045 obstack_grow (&cu_list
, val
, 8);
23046 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23047 obstack_grow (&cu_list
, val
, 8);
23050 /* Dump the address map. */
23051 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23053 /* Write out the .debug_type entries, if any. */
23054 if (dwarf2_per_objfile
->signatured_types
)
23056 struct signatured_type_index_data sig_data
;
23058 sig_data
.objfile
= objfile
;
23059 sig_data
.symtab
= symtab
;
23060 sig_data
.types_list
= &types_cu_list
;
23061 sig_data
.psyms_seen
= psyms_seen
;
23062 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23063 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23064 write_one_signatured_type
, &sig_data
);
23067 /* Now that we've processed all symbols we can shrink their cu_indices
23069 uniquify_cu_indices (symtab
);
23071 obstack_init (&constant_pool
);
23072 make_cleanup_obstack_free (&constant_pool
);
23073 obstack_init (&symtab_obstack
);
23074 make_cleanup_obstack_free (&symtab_obstack
);
23075 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23077 obstack_init (&contents
);
23078 make_cleanup_obstack_free (&contents
);
23079 size_of_contents
= 6 * sizeof (offset_type
);
23080 total_len
= size_of_contents
;
23082 /* The version number. */
23083 val
= MAYBE_SWAP (8);
23084 obstack_grow (&contents
, &val
, sizeof (val
));
23086 /* The offset of the CU list from the start of the file. */
23087 val
= MAYBE_SWAP (total_len
);
23088 obstack_grow (&contents
, &val
, sizeof (val
));
23089 total_len
+= obstack_object_size (&cu_list
);
23091 /* The offset of the types CU list from the start of the file. */
23092 val
= MAYBE_SWAP (total_len
);
23093 obstack_grow (&contents
, &val
, sizeof (val
));
23094 total_len
+= obstack_object_size (&types_cu_list
);
23096 /* The offset of the address table from the start of the file. */
23097 val
= MAYBE_SWAP (total_len
);
23098 obstack_grow (&contents
, &val
, sizeof (val
));
23099 total_len
+= obstack_object_size (&addr_obstack
);
23101 /* The offset of the symbol table from the start of the file. */
23102 val
= MAYBE_SWAP (total_len
);
23103 obstack_grow (&contents
, &val
, sizeof (val
));
23104 total_len
+= obstack_object_size (&symtab_obstack
);
23106 /* The offset of the constant pool from the start of the file. */
23107 val
= MAYBE_SWAP (total_len
);
23108 obstack_grow (&contents
, &val
, sizeof (val
));
23109 total_len
+= obstack_object_size (&constant_pool
);
23111 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23113 write_obstack (out_file
, &contents
);
23114 write_obstack (out_file
, &cu_list
);
23115 write_obstack (out_file
, &types_cu_list
);
23116 write_obstack (out_file
, &addr_obstack
);
23117 write_obstack (out_file
, &symtab_obstack
);
23118 write_obstack (out_file
, &constant_pool
);
23122 /* We want to keep the file, so we set cleanup_filename to NULL
23123 here. See unlink_if_set. */
23124 cleanup_filename
= NULL
;
23126 do_cleanups (cleanup
);
23129 /* Implementation of the `save gdb-index' command.
23131 Note that the file format used by this command is documented in the
23132 GDB manual. Any changes here must be documented there. */
23135 save_gdb_index_command (char *arg
, int from_tty
)
23137 struct objfile
*objfile
;
23140 error (_("usage: save gdb-index DIRECTORY"));
23142 ALL_OBJFILES (objfile
)
23146 /* If the objfile does not correspond to an actual file, skip it. */
23147 if (stat (objfile_name (objfile
), &st
) < 0)
23150 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
23151 if (dwarf2_per_objfile
)
23153 volatile struct gdb_exception except
;
23155 TRY_CATCH (except
, RETURN_MASK_ERROR
)
23157 write_psymtabs_to_index (objfile
, arg
);
23159 if (except
.reason
< 0)
23160 exception_fprintf (gdb_stderr
, except
,
23161 _("Error while writing index for `%s': "),
23162 objfile_name (objfile
));
23169 int dwarf2_always_disassemble
;
23172 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
23173 struct cmd_list_element
*c
, const char *value
)
23175 fprintf_filtered (file
,
23176 _("Whether to always disassemble "
23177 "DWARF expressions is %s.\n"),
23182 show_check_physname (struct ui_file
*file
, int from_tty
,
23183 struct cmd_list_element
*c
, const char *value
)
23185 fprintf_filtered (file
,
23186 _("Whether to check \"physname\" is %s.\n"),
23190 void _initialize_dwarf2_read (void);
23193 _initialize_dwarf2_read (void)
23195 struct cmd_list_element
*c
;
23197 dwarf2_objfile_data_key
23198 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23200 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
23201 Set DWARF 2 specific variables.\n\
23202 Configure DWARF 2 variables such as the cache size"),
23203 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
23204 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23206 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
23207 Show DWARF 2 specific variables\n\
23208 Show DWARF 2 variables such as the cache size"),
23209 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
23210 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23212 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23213 &dwarf2_max_cache_age
, _("\
23214 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
23215 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
23216 A higher limit means that cached compilation units will be stored\n\
23217 in memory longer, and more total memory will be used. Zero disables\n\
23218 caching, which can slow down startup."),
23220 show_dwarf2_max_cache_age
,
23221 &set_dwarf2_cmdlist
,
23222 &show_dwarf2_cmdlist
);
23224 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23225 &dwarf2_always_disassemble
, _("\
23226 Set whether `info address' always disassembles DWARF expressions."), _("\
23227 Show whether `info address' always disassembles DWARF expressions."), _("\
23228 When enabled, DWARF expressions are always printed in an assembly-like\n\
23229 syntax. When disabled, expressions will be printed in a more\n\
23230 conversational style, when possible."),
23232 show_dwarf2_always_disassemble
,
23233 &set_dwarf2_cmdlist
,
23234 &show_dwarf2_cmdlist
);
23236 add_setshow_zuinteger_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
23237 Set debugging of the dwarf2 reader."), _("\
23238 Show debugging of the dwarf2 reader."), _("\
23239 When enabled (non-zero), debugging messages are printed during dwarf2\n\
23240 reading and symtab expansion. A value of 1 (one) provides basic\n\
23241 information. A value greater than 1 provides more verbose information."),
23244 &setdebuglist
, &showdebuglist
);
23246 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
23247 Set debugging of the dwarf2 DIE reader."), _("\
23248 Show debugging of the dwarf2 DIE reader."), _("\
23249 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23250 The value is the maximum depth to print."),
23253 &setdebuglist
, &showdebuglist
);
23255 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23256 Set cross-checking of \"physname\" code against demangler."), _("\
23257 Show cross-checking of \"physname\" code against demangler."), _("\
23258 When enabled, GDB's internal \"physname\" code is checked against\n\
23260 NULL
, show_check_physname
,
23261 &setdebuglist
, &showdebuglist
);
23263 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23264 no_class
, &use_deprecated_index_sections
, _("\
23265 Set whether to use deprecated gdb_index sections."), _("\
23266 Show whether to use deprecated gdb_index sections."), _("\
23267 When enabled, deprecated .gdb_index sections are used anyway.\n\
23268 Normally they are ignored either because of a missing feature or\n\
23269 performance issue.\n\
23270 Warning: This option must be enabled before gdb reads the file."),
23273 &setlist
, &showlist
);
23275 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23277 Save a gdb-index file.\n\
23278 Usage: save gdb-index DIRECTORY"),
23280 set_cmd_completer (c
, filename_completer
);
23282 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23283 &dwarf2_locexpr_funcs
);
23284 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23285 &dwarf2_loclist_funcs
);
23287 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23288 &dwarf2_block_frame_base_locexpr_funcs
);
23289 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23290 &dwarf2_block_frame_base_loclist_funcs
);