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 enum search_domain kind
,
3833 struct mapped_index
*index
;
3835 dw2_setup (objfile
);
3837 /* index_table is NULL if OBJF_READNOW. */
3838 if (!dwarf2_per_objfile
->index_table
)
3840 index
= dwarf2_per_objfile
->index_table
;
3842 if (file_matcher
!= NULL
)
3844 struct cleanup
*cleanup
;
3845 htab_t visited_found
, visited_not_found
;
3847 visited_found
= htab_create_alloc (10,
3848 htab_hash_pointer
, htab_eq_pointer
,
3849 NULL
, xcalloc
, xfree
);
3850 cleanup
= make_cleanup_htab_delete (visited_found
);
3851 visited_not_found
= htab_create_alloc (10,
3852 htab_hash_pointer
, htab_eq_pointer
,
3853 NULL
, xcalloc
, xfree
);
3854 make_cleanup_htab_delete (visited_not_found
);
3856 /* The rule is CUs specify all the files, including those used by
3857 any TU, so there's no need to scan TUs here. */
3859 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3862 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3863 struct quick_file_names
*file_data
;
3866 per_cu
->v
.quick
->mark
= 0;
3868 /* We only need to look at symtabs not already expanded. */
3869 if (per_cu
->v
.quick
->compunit_symtab
)
3872 file_data
= dw2_get_file_names (per_cu
);
3873 if (file_data
== NULL
)
3876 if (htab_find (visited_not_found
, file_data
) != NULL
)
3878 else if (htab_find (visited_found
, file_data
) != NULL
)
3880 per_cu
->v
.quick
->mark
= 1;
3884 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3886 const char *this_real_name
;
3888 if (file_matcher (file_data
->file_names
[j
], data
, 0))
3890 per_cu
->v
.quick
->mark
= 1;
3894 /* Before we invoke realpath, which can get expensive when many
3895 files are involved, do a quick comparison of the basenames. */
3896 if (!basenames_may_differ
3897 && !file_matcher (lbasename (file_data
->file_names
[j
]),
3901 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3902 if (file_matcher (this_real_name
, data
, 0))
3904 per_cu
->v
.quick
->mark
= 1;
3909 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3911 : visited_not_found
,
3916 do_cleanups (cleanup
);
3919 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3921 offset_type idx
= 2 * iter
;
3923 offset_type
*vec
, vec_len
, vec_idx
;
3924 int global_seen
= 0;
3926 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3929 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3931 if (! (*symbol_matcher
) (name
, data
))
3934 /* The name was matched, now expand corresponding CUs that were
3936 vec
= (offset_type
*) (index
->constant_pool
3937 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3938 vec_len
= MAYBE_SWAP (vec
[0]);
3939 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3941 struct dwarf2_per_cu_data
*per_cu
;
3942 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3943 /* This value is only valid for index versions >= 7. */
3944 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3945 gdb_index_symbol_kind symbol_kind
=
3946 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3947 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3948 /* Only check the symbol attributes if they're present.
3949 Indices prior to version 7 don't record them,
3950 and indices >= 7 may elide them for certain symbols
3951 (gold does this). */
3953 (index
->version
>= 7
3954 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3956 /* Work around gold/15646. */
3959 if (!is_static
&& global_seen
)
3965 /* Only check the symbol's kind if it has one. */
3970 case VARIABLES_DOMAIN
:
3971 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3974 case FUNCTIONS_DOMAIN
:
3975 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3979 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3987 /* Don't crash on bad data. */
3988 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3989 + dwarf2_per_objfile
->n_type_units
))
3991 complaint (&symfile_complaints
,
3992 _(".gdb_index entry has bad CU index"
3993 " [in module %s]"), objfile_name (objfile
));
3997 per_cu
= dw2_get_cutu (cu_index
);
3998 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3999 dw2_instantiate_symtab (per_cu
);
4004 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4007 static struct compunit_symtab
*
4008 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4013 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4014 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4017 if (cust
->includes
== NULL
)
4020 for (i
= 0; cust
->includes
[i
]; ++i
)
4022 struct compunit_symtab
*s
= cust
->includes
[i
];
4024 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4032 static struct compunit_symtab
*
4033 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4034 struct bound_minimal_symbol msymbol
,
4036 struct obj_section
*section
,
4039 struct dwarf2_per_cu_data
*data
;
4040 struct compunit_symtab
*result
;
4042 dw2_setup (objfile
);
4044 if (!objfile
->psymtabs_addrmap
)
4047 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
4051 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4052 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4053 paddress (get_objfile_arch (objfile
), pc
));
4056 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4058 gdb_assert (result
!= NULL
);
4063 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4064 void *data
, int need_fullname
)
4067 struct cleanup
*cleanup
;
4068 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
4069 NULL
, xcalloc
, xfree
);
4071 cleanup
= make_cleanup_htab_delete (visited
);
4072 dw2_setup (objfile
);
4074 /* The rule is CUs specify all the files, including those used by
4075 any TU, so there's no need to scan TUs here.
4076 We can ignore file names coming from already-expanded CUs. */
4078 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4080 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4082 if (per_cu
->v
.quick
->compunit_symtab
)
4084 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
4087 *slot
= per_cu
->v
.quick
->file_names
;
4091 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4094 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4095 struct quick_file_names
*file_data
;
4098 /* We only need to look at symtabs not already expanded. */
4099 if (per_cu
->v
.quick
->compunit_symtab
)
4102 file_data
= dw2_get_file_names (per_cu
);
4103 if (file_data
== NULL
)
4106 slot
= htab_find_slot (visited
, file_data
, INSERT
);
4109 /* Already visited. */
4114 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4116 const char *this_real_name
;
4119 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4121 this_real_name
= NULL
;
4122 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
4126 do_cleanups (cleanup
);
4130 dw2_has_symbols (struct objfile
*objfile
)
4135 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4138 dw2_find_last_source_symtab
,
4139 dw2_forget_cached_source_info
,
4140 dw2_map_symtabs_matching_filename
,
4145 dw2_expand_symtabs_for_function
,
4146 dw2_expand_all_symtabs
,
4147 dw2_expand_symtabs_with_fullname
,
4148 dw2_map_matching_symbols
,
4149 dw2_expand_symtabs_matching
,
4150 dw2_find_pc_sect_compunit_symtab
,
4151 dw2_map_symbol_filenames
4154 /* Initialize for reading DWARF for this objfile. Return 0 if this
4155 file will use psymtabs, or 1 if using the GNU index. */
4158 dwarf2_initialize_objfile (struct objfile
*objfile
)
4160 /* If we're about to read full symbols, don't bother with the
4161 indices. In this case we also don't care if some other debug
4162 format is making psymtabs, because they are all about to be
4164 if ((objfile
->flags
& OBJF_READNOW
))
4168 dwarf2_per_objfile
->using_index
= 1;
4169 create_all_comp_units (objfile
);
4170 create_all_type_units (objfile
);
4171 dwarf2_per_objfile
->quick_file_names_table
=
4172 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4174 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4175 + dwarf2_per_objfile
->n_type_units
); ++i
)
4177 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4179 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4180 struct dwarf2_per_cu_quick_data
);
4183 /* Return 1 so that gdb sees the "quick" functions. However,
4184 these functions will be no-ops because we will have expanded
4189 if (dwarf2_read_index (objfile
))
4197 /* Build a partial symbol table. */
4200 dwarf2_build_psymtabs (struct objfile
*objfile
)
4202 volatile struct gdb_exception except
;
4204 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4206 init_psymbol_list (objfile
, 1024);
4209 TRY_CATCH (except
, RETURN_MASK_ERROR
)
4211 /* This isn't really ideal: all the data we allocate on the
4212 objfile's obstack is still uselessly kept around. However,
4213 freeing it seems unsafe. */
4214 struct cleanup
*cleanups
= make_cleanup_discard_psymtabs (objfile
);
4216 dwarf2_build_psymtabs_hard (objfile
);
4217 discard_cleanups (cleanups
);
4219 if (except
.reason
< 0)
4220 exception_print (gdb_stderr
, except
);
4223 /* Return the total length of the CU described by HEADER. */
4226 get_cu_length (const struct comp_unit_head
*header
)
4228 return header
->initial_length_size
+ header
->length
;
4231 /* Return TRUE if OFFSET is within CU_HEADER. */
4234 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
4236 sect_offset bottom
= { cu_header
->offset
.sect_off
};
4237 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
4239 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
4242 /* Find the base address of the compilation unit for range lists and
4243 location lists. It will normally be specified by DW_AT_low_pc.
4244 In DWARF-3 draft 4, the base address could be overridden by
4245 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4246 compilation units with discontinuous ranges. */
4249 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4251 struct attribute
*attr
;
4254 cu
->base_address
= 0;
4256 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4259 cu
->base_address
= attr_value_as_address (attr
);
4264 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4267 cu
->base_address
= attr_value_as_address (attr
);
4273 /* Read in the comp unit header information from the debug_info at info_ptr.
4274 NOTE: This leaves members offset, first_die_offset to be filled in
4277 static const gdb_byte
*
4278 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4279 const gdb_byte
*info_ptr
, bfd
*abfd
)
4282 unsigned int bytes_read
;
4284 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4285 cu_header
->initial_length_size
= bytes_read
;
4286 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4287 info_ptr
+= bytes_read
;
4288 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4290 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
4292 info_ptr
+= bytes_read
;
4293 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4295 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4296 if (signed_addr
< 0)
4297 internal_error (__FILE__
, __LINE__
,
4298 _("read_comp_unit_head: dwarf from non elf file"));
4299 cu_header
->signed_addr_p
= signed_addr
;
4304 /* Helper function that returns the proper abbrev section for
4307 static struct dwarf2_section_info
*
4308 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4310 struct dwarf2_section_info
*abbrev
;
4312 if (this_cu
->is_dwz
)
4313 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4315 abbrev
= &dwarf2_per_objfile
->abbrev
;
4320 /* Subroutine of read_and_check_comp_unit_head and
4321 read_and_check_type_unit_head to simplify them.
4322 Perform various error checking on the header. */
4325 error_check_comp_unit_head (struct comp_unit_head
*header
,
4326 struct dwarf2_section_info
*section
,
4327 struct dwarf2_section_info
*abbrev_section
)
4329 bfd
*abfd
= get_section_bfd_owner (section
);
4330 const char *filename
= get_section_file_name (section
);
4332 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
4333 error (_("Dwarf Error: wrong version in compilation unit header "
4334 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
4337 if (header
->abbrev_offset
.sect_off
4338 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4339 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
4340 "(offset 0x%lx + 6) [in module %s]"),
4341 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
4344 /* Cast to unsigned long to use 64-bit arithmetic when possible to
4345 avoid potential 32-bit overflow. */
4346 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
4348 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
4349 "(offset 0x%lx + 0) [in module %s]"),
4350 (long) header
->length
, (long) header
->offset
.sect_off
,
4354 /* Read in a CU/TU header and perform some basic error checking.
4355 The contents of the header are stored in HEADER.
4356 The result is a pointer to the start of the first DIE. */
4358 static const gdb_byte
*
4359 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4360 struct dwarf2_section_info
*section
,
4361 struct dwarf2_section_info
*abbrev_section
,
4362 const gdb_byte
*info_ptr
,
4363 int is_debug_types_section
)
4365 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4366 bfd
*abfd
= get_section_bfd_owner (section
);
4368 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4370 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4372 /* If we're reading a type unit, skip over the signature and
4373 type_offset fields. */
4374 if (is_debug_types_section
)
4375 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
4377 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4379 error_check_comp_unit_head (header
, section
, abbrev_section
);
4384 /* Read in the types comp unit header information from .debug_types entry at
4385 types_ptr. The result is a pointer to one past the end of the header. */
4387 static const gdb_byte
*
4388 read_and_check_type_unit_head (struct comp_unit_head
*header
,
4389 struct dwarf2_section_info
*section
,
4390 struct dwarf2_section_info
*abbrev_section
,
4391 const gdb_byte
*info_ptr
,
4392 ULONGEST
*signature
,
4393 cu_offset
*type_offset_in_tu
)
4395 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4396 bfd
*abfd
= get_section_bfd_owner (section
);
4398 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
4400 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
4402 /* If we're reading a type unit, skip over the signature and
4403 type_offset fields. */
4404 if (signature
!= NULL
)
4405 *signature
= read_8_bytes (abfd
, info_ptr
);
4407 if (type_offset_in_tu
!= NULL
)
4408 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
4409 header
->offset_size
);
4410 info_ptr
+= header
->offset_size
;
4412 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
4414 error_check_comp_unit_head (header
, section
, abbrev_section
);
4419 /* Fetch the abbreviation table offset from a comp or type unit header. */
4422 read_abbrev_offset (struct dwarf2_section_info
*section
,
4425 bfd
*abfd
= get_section_bfd_owner (section
);
4426 const gdb_byte
*info_ptr
;
4427 unsigned int length
, initial_length_size
, offset_size
;
4428 sect_offset abbrev_offset
;
4430 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4431 info_ptr
= section
->buffer
+ offset
.sect_off
;
4432 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4433 offset_size
= initial_length_size
== 4 ? 4 : 8;
4434 info_ptr
+= initial_length_size
+ 2 /*version*/;
4435 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
4436 return abbrev_offset
;
4439 /* Allocate a new partial symtab for file named NAME and mark this new
4440 partial symtab as being an include of PST. */
4443 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4444 struct objfile
*objfile
)
4446 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4448 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4450 /* It shares objfile->objfile_obstack. */
4451 subpst
->dirname
= pst
->dirname
;
4454 subpst
->section_offsets
= pst
->section_offsets
;
4455 subpst
->textlow
= 0;
4456 subpst
->texthigh
= 0;
4458 subpst
->dependencies
= (struct partial_symtab
**)
4459 obstack_alloc (&objfile
->objfile_obstack
,
4460 sizeof (struct partial_symtab
*));
4461 subpst
->dependencies
[0] = pst
;
4462 subpst
->number_of_dependencies
= 1;
4464 subpst
->globals_offset
= 0;
4465 subpst
->n_global_syms
= 0;
4466 subpst
->statics_offset
= 0;
4467 subpst
->n_static_syms
= 0;
4468 subpst
->compunit_symtab
= NULL
;
4469 subpst
->read_symtab
= pst
->read_symtab
;
4472 /* No private part is necessary for include psymtabs. This property
4473 can be used to differentiate between such include psymtabs and
4474 the regular ones. */
4475 subpst
->read_symtab_private
= NULL
;
4478 /* Read the Line Number Program data and extract the list of files
4479 included by the source file represented by PST. Build an include
4480 partial symtab for each of these included files. */
4483 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4484 struct die_info
*die
,
4485 struct partial_symtab
*pst
)
4487 struct line_header
*lh
= NULL
;
4488 struct attribute
*attr
;
4490 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4492 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
4494 return; /* No linetable, so no includes. */
4496 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4497 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4499 free_line_header (lh
);
4503 hash_signatured_type (const void *item
)
4505 const struct signatured_type
*sig_type
= item
;
4507 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4508 return sig_type
->signature
;
4512 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4514 const struct signatured_type
*lhs
= item_lhs
;
4515 const struct signatured_type
*rhs
= item_rhs
;
4517 return lhs
->signature
== rhs
->signature
;
4520 /* Allocate a hash table for signatured types. */
4523 allocate_signatured_type_table (struct objfile
*objfile
)
4525 return htab_create_alloc_ex (41,
4526 hash_signatured_type
,
4529 &objfile
->objfile_obstack
,
4530 hashtab_obstack_allocate
,
4531 dummy_obstack_deallocate
);
4534 /* A helper function to add a signatured type CU to a table. */
4537 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4539 struct signatured_type
*sigt
= *slot
;
4540 struct signatured_type
***datap
= datum
;
4548 /* Create the hash table of all entries in the .debug_types
4549 (or .debug_types.dwo) section(s).
4550 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4551 otherwise it is NULL.
4553 The result is a pointer to the hash table or NULL if there are no types.
4555 Note: This function processes DWO files only, not DWP files. */
4558 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4559 VEC (dwarf2_section_info_def
) *types
)
4561 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4562 htab_t types_htab
= NULL
;
4564 struct dwarf2_section_info
*section
;
4565 struct dwarf2_section_info
*abbrev_section
;
4567 if (VEC_empty (dwarf2_section_info_def
, types
))
4570 abbrev_section
= (dwo_file
!= NULL
4571 ? &dwo_file
->sections
.abbrev
4572 : &dwarf2_per_objfile
->abbrev
);
4574 if (dwarf2_read_debug
)
4575 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4576 dwo_file
? ".dwo" : "",
4577 get_section_file_name (abbrev_section
));
4580 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4584 const gdb_byte
*info_ptr
, *end_ptr
;
4586 dwarf2_read_section (objfile
, section
);
4587 info_ptr
= section
->buffer
;
4589 if (info_ptr
== NULL
)
4592 /* We can't set abfd until now because the section may be empty or
4593 not present, in which case the bfd is unknown. */
4594 abfd
= get_section_bfd_owner (section
);
4596 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4597 because we don't need to read any dies: the signature is in the
4600 end_ptr
= info_ptr
+ section
->size
;
4601 while (info_ptr
< end_ptr
)
4604 cu_offset type_offset_in_tu
;
4606 struct signatured_type
*sig_type
;
4607 struct dwo_unit
*dwo_tu
;
4609 const gdb_byte
*ptr
= info_ptr
;
4610 struct comp_unit_head header
;
4611 unsigned int length
;
4613 offset
.sect_off
= ptr
- section
->buffer
;
4615 /* We need to read the type's signature in order to build the hash
4616 table, but we don't need anything else just yet. */
4618 ptr
= read_and_check_type_unit_head (&header
, section
,
4619 abbrev_section
, ptr
,
4620 &signature
, &type_offset_in_tu
);
4622 length
= get_cu_length (&header
);
4624 /* Skip dummy type units. */
4625 if (ptr
>= info_ptr
+ length
4626 || peek_abbrev_code (abfd
, ptr
) == 0)
4632 if (types_htab
== NULL
)
4635 types_htab
= allocate_dwo_unit_table (objfile
);
4637 types_htab
= allocate_signatured_type_table (objfile
);
4643 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4645 dwo_tu
->dwo_file
= dwo_file
;
4646 dwo_tu
->signature
= signature
;
4647 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4648 dwo_tu
->section
= section
;
4649 dwo_tu
->offset
= offset
;
4650 dwo_tu
->length
= length
;
4654 /* N.B.: type_offset is not usable if this type uses a DWO file.
4655 The real type_offset is in the DWO file. */
4657 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4658 struct signatured_type
);
4659 sig_type
->signature
= signature
;
4660 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4661 sig_type
->per_cu
.objfile
= objfile
;
4662 sig_type
->per_cu
.is_debug_types
= 1;
4663 sig_type
->per_cu
.section
= section
;
4664 sig_type
->per_cu
.offset
= offset
;
4665 sig_type
->per_cu
.length
= length
;
4668 slot
= htab_find_slot (types_htab
,
4669 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4671 gdb_assert (slot
!= NULL
);
4674 sect_offset dup_offset
;
4678 const struct dwo_unit
*dup_tu
= *slot
;
4680 dup_offset
= dup_tu
->offset
;
4684 const struct signatured_type
*dup_tu
= *slot
;
4686 dup_offset
= dup_tu
->per_cu
.offset
;
4689 complaint (&symfile_complaints
,
4690 _("debug type entry at offset 0x%x is duplicate to"
4691 " the entry at offset 0x%x, signature %s"),
4692 offset
.sect_off
, dup_offset
.sect_off
,
4693 hex_string (signature
));
4695 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4697 if (dwarf2_read_debug
> 1)
4698 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4700 hex_string (signature
));
4709 /* Create the hash table of all entries in the .debug_types section,
4710 and initialize all_type_units.
4711 The result is zero if there is an error (e.g. missing .debug_types section),
4712 otherwise non-zero. */
4715 create_all_type_units (struct objfile
*objfile
)
4718 struct signatured_type
**iter
;
4720 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4721 if (types_htab
== NULL
)
4723 dwarf2_per_objfile
->signatured_types
= NULL
;
4727 dwarf2_per_objfile
->signatured_types
= types_htab
;
4729 dwarf2_per_objfile
->n_type_units
4730 = dwarf2_per_objfile
->n_allocated_type_units
4731 = htab_elements (types_htab
);
4732 dwarf2_per_objfile
->all_type_units
4733 = xmalloc (dwarf2_per_objfile
->n_type_units
4734 * sizeof (struct signatured_type
*));
4735 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4736 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4737 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4738 == dwarf2_per_objfile
->n_type_units
);
4743 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
4744 If SLOT is non-NULL, it is the entry to use in the hash table.
4745 Otherwise we find one. */
4747 static struct signatured_type
*
4748 add_type_unit (ULONGEST sig
, void **slot
)
4750 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4751 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
4752 struct signatured_type
*sig_type
;
4754 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
4756 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
4758 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
4759 dwarf2_per_objfile
->n_allocated_type_units
= 1;
4760 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
4761 dwarf2_per_objfile
->all_type_units
4762 = xrealloc (dwarf2_per_objfile
->all_type_units
,
4763 dwarf2_per_objfile
->n_allocated_type_units
4764 * sizeof (struct signatured_type
*));
4765 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
4767 dwarf2_per_objfile
->n_type_units
= n_type_units
;
4769 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4770 struct signatured_type
);
4771 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
4772 sig_type
->signature
= sig
;
4773 sig_type
->per_cu
.is_debug_types
= 1;
4774 if (dwarf2_per_objfile
->using_index
)
4776 sig_type
->per_cu
.v
.quick
=
4777 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4778 struct dwarf2_per_cu_quick_data
);
4783 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4786 gdb_assert (*slot
== NULL
);
4788 /* The rest of sig_type must be filled in by the caller. */
4792 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
4793 Fill in SIG_ENTRY with DWO_ENTRY. */
4796 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
4797 struct signatured_type
*sig_entry
,
4798 struct dwo_unit
*dwo_entry
)
4800 /* Make sure we're not clobbering something we don't expect to. */
4801 gdb_assert (! sig_entry
->per_cu
.queued
);
4802 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
4803 if (dwarf2_per_objfile
->using_index
)
4805 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
4806 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
4809 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
4810 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
4811 gdb_assert (sig_entry
->type_offset_in_section
.sect_off
== 0);
4812 gdb_assert (sig_entry
->type_unit_group
== NULL
);
4813 gdb_assert (sig_entry
->dwo_unit
== NULL
);
4815 sig_entry
->per_cu
.section
= dwo_entry
->section
;
4816 sig_entry
->per_cu
.offset
= dwo_entry
->offset
;
4817 sig_entry
->per_cu
.length
= dwo_entry
->length
;
4818 sig_entry
->per_cu
.reading_dwo_directly
= 1;
4819 sig_entry
->per_cu
.objfile
= objfile
;
4820 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
4821 sig_entry
->dwo_unit
= dwo_entry
;
4824 /* Subroutine of lookup_signatured_type.
4825 If we haven't read the TU yet, create the signatured_type data structure
4826 for a TU to be read in directly from a DWO file, bypassing the stub.
4827 This is the "Stay in DWO Optimization": When there is no DWP file and we're
4828 using .gdb_index, then when reading a CU we want to stay in the DWO file
4829 containing that CU. Otherwise we could end up reading several other DWO
4830 files (due to comdat folding) to process the transitive closure of all the
4831 mentioned TUs, and that can be slow. The current DWO file will have every
4832 type signature that it needs.
4833 We only do this for .gdb_index because in the psymtab case we already have
4834 to read all the DWOs to build the type unit groups. */
4836 static struct signatured_type
*
4837 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4839 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4840 struct dwo_file
*dwo_file
;
4841 struct dwo_unit find_dwo_entry
, *dwo_entry
;
4842 struct signatured_type find_sig_entry
, *sig_entry
;
4845 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4847 /* If TU skeletons have been removed then we may not have read in any
4849 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4851 dwarf2_per_objfile
->signatured_types
4852 = allocate_signatured_type_table (objfile
);
4855 /* We only ever need to read in one copy of a signatured type.
4856 Use the global signatured_types array to do our own comdat-folding
4857 of types. If this is the first time we're reading this TU, and
4858 the TU has an entry in .gdb_index, replace the recorded data from
4859 .gdb_index with this TU. */
4861 find_sig_entry
.signature
= sig
;
4862 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4863 &find_sig_entry
, INSERT
);
4866 /* We can get here with the TU already read, *or* in the process of being
4867 read. Don't reassign the global entry to point to this DWO if that's
4868 the case. Also note that if the TU is already being read, it may not
4869 have come from a DWO, the program may be a mix of Fission-compiled
4870 code and non-Fission-compiled code. */
4872 /* Have we already tried to read this TU?
4873 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4874 needn't exist in the global table yet). */
4875 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
4878 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
4879 dwo_unit of the TU itself. */
4880 dwo_file
= cu
->dwo_unit
->dwo_file
;
4882 /* Ok, this is the first time we're reading this TU. */
4883 if (dwo_file
->tus
== NULL
)
4885 find_dwo_entry
.signature
= sig
;
4886 dwo_entry
= htab_find (dwo_file
->tus
, &find_dwo_entry
);
4887 if (dwo_entry
== NULL
)
4890 /* If the global table doesn't have an entry for this TU, add one. */
4891 if (sig_entry
== NULL
)
4892 sig_entry
= add_type_unit (sig
, slot
);
4894 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4895 sig_entry
->per_cu
.tu_read
= 1;
4899 /* Subroutine of lookup_signatured_type.
4900 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
4901 then try the DWP file. If the TU stub (skeleton) has been removed then
4902 it won't be in .gdb_index. */
4904 static struct signatured_type
*
4905 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4907 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4908 struct dwp_file
*dwp_file
= get_dwp_file ();
4909 struct dwo_unit
*dwo_entry
;
4910 struct signatured_type find_sig_entry
, *sig_entry
;
4913 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
4914 gdb_assert (dwp_file
!= NULL
);
4916 /* If TU skeletons have been removed then we may not have read in any
4918 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4920 dwarf2_per_objfile
->signatured_types
4921 = allocate_signatured_type_table (objfile
);
4924 find_sig_entry
.signature
= sig
;
4925 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
4926 &find_sig_entry
, INSERT
);
4929 /* Have we already tried to read this TU?
4930 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
4931 needn't exist in the global table yet). */
4932 if (sig_entry
!= NULL
)
4935 if (dwp_file
->tus
== NULL
)
4937 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
4938 sig
, 1 /* is_debug_types */);
4939 if (dwo_entry
== NULL
)
4942 sig_entry
= add_type_unit (sig
, slot
);
4943 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
4948 /* Lookup a signature based type for DW_FORM_ref_sig8.
4949 Returns NULL if signature SIG is not present in the table.
4950 It is up to the caller to complain about this. */
4952 static struct signatured_type
*
4953 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
4956 && dwarf2_per_objfile
->using_index
)
4958 /* We're in a DWO/DWP file, and we're using .gdb_index.
4959 These cases require special processing. */
4960 if (get_dwp_file () == NULL
)
4961 return lookup_dwo_signatured_type (cu
, sig
);
4963 return lookup_dwp_signatured_type (cu
, sig
);
4967 struct signatured_type find_entry
, *entry
;
4969 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4971 find_entry
.signature
= sig
;
4972 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4977 /* Low level DIE reading support. */
4979 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4982 init_cu_die_reader (struct die_reader_specs
*reader
,
4983 struct dwarf2_cu
*cu
,
4984 struct dwarf2_section_info
*section
,
4985 struct dwo_file
*dwo_file
)
4987 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4988 reader
->abfd
= get_section_bfd_owner (section
);
4990 reader
->dwo_file
= dwo_file
;
4991 reader
->die_section
= section
;
4992 reader
->buffer
= section
->buffer
;
4993 reader
->buffer_end
= section
->buffer
+ section
->size
;
4994 reader
->comp_dir
= NULL
;
4997 /* Subroutine of init_cutu_and_read_dies to simplify it.
4998 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
4999 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5002 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5003 from it to the DIE in the DWO. If NULL we are skipping the stub.
5004 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5005 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5006 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5007 STUB_COMP_DIR may be non-NULL.
5008 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5009 are filled in with the info of the DIE from the DWO file.
5010 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5011 provided an abbrev table to use.
5012 The result is non-zero if a valid (non-dummy) DIE was found. */
5015 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5016 struct dwo_unit
*dwo_unit
,
5017 int abbrev_table_provided
,
5018 struct die_info
*stub_comp_unit_die
,
5019 const char *stub_comp_dir
,
5020 struct die_reader_specs
*result_reader
,
5021 const gdb_byte
**result_info_ptr
,
5022 struct die_info
**result_comp_unit_die
,
5023 int *result_has_children
)
5025 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5026 struct dwarf2_cu
*cu
= this_cu
->cu
;
5027 struct dwarf2_section_info
*section
;
5029 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5030 ULONGEST signature
; /* Or dwo_id. */
5031 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5032 int i
,num_extra_attrs
;
5033 struct dwarf2_section_info
*dwo_abbrev_section
;
5034 struct attribute
*attr
;
5035 struct die_info
*comp_unit_die
;
5037 /* At most one of these may be provided. */
5038 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5040 /* These attributes aren't processed until later:
5041 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5042 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5043 referenced later. However, these attributes are found in the stub
5044 which we won't have later. In order to not impose this complication
5045 on the rest of the code, we read them here and copy them to the
5054 if (stub_comp_unit_die
!= NULL
)
5056 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5058 if (! this_cu
->is_debug_types
)
5059 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5060 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5061 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5062 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5063 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5065 /* There should be a DW_AT_addr_base attribute here (if needed).
5066 We need the value before we can process DW_FORM_GNU_addr_index. */
5068 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5070 cu
->addr_base
= DW_UNSND (attr
);
5072 /* There should be a DW_AT_ranges_base attribute here (if needed).
5073 We need the value before we can process DW_AT_ranges. */
5074 cu
->ranges_base
= 0;
5075 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5077 cu
->ranges_base
= DW_UNSND (attr
);
5079 else if (stub_comp_dir
!= NULL
)
5081 /* Reconstruct the comp_dir attribute to simplify the code below. */
5082 comp_dir
= (struct attribute
*)
5083 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (*comp_dir
));
5084 comp_dir
->name
= DW_AT_comp_dir
;
5085 comp_dir
->form
= DW_FORM_string
;
5086 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5087 DW_STRING (comp_dir
) = stub_comp_dir
;
5090 /* Set up for reading the DWO CU/TU. */
5091 cu
->dwo_unit
= dwo_unit
;
5092 section
= dwo_unit
->section
;
5093 dwarf2_read_section (objfile
, section
);
5094 abfd
= get_section_bfd_owner (section
);
5095 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
5096 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5097 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5099 if (this_cu
->is_debug_types
)
5101 ULONGEST header_signature
;
5102 cu_offset type_offset_in_tu
;
5103 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5105 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5109 &type_offset_in_tu
);
5110 /* This is not an assert because it can be caused by bad debug info. */
5111 if (sig_type
->signature
!= header_signature
)
5113 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5114 " TU at offset 0x%x [in module %s]"),
5115 hex_string (sig_type
->signature
),
5116 hex_string (header_signature
),
5117 dwo_unit
->offset
.sect_off
,
5118 bfd_get_filename (abfd
));
5120 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5121 /* For DWOs coming from DWP files, we don't know the CU length
5122 nor the type's offset in the TU until now. */
5123 dwo_unit
->length
= get_cu_length (&cu
->header
);
5124 dwo_unit
->type_offset_in_tu
= type_offset_in_tu
;
5126 /* Establish the type offset that can be used to lookup the type.
5127 For DWO files, we don't know it until now. */
5128 sig_type
->type_offset_in_section
.sect_off
=
5129 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
5133 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5136 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5137 /* For DWOs coming from DWP files, we don't know the CU length
5139 dwo_unit
->length
= get_cu_length (&cu
->header
);
5142 /* Replace the CU's original abbrev table with the DWO's.
5143 Reminder: We can't read the abbrev table until we've read the header. */
5144 if (abbrev_table_provided
)
5146 /* Don't free the provided abbrev table, the caller of
5147 init_cutu_and_read_dies owns it. */
5148 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5149 /* Ensure the DWO abbrev table gets freed. */
5150 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5154 dwarf2_free_abbrev_table (cu
);
5155 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5156 /* Leave any existing abbrev table cleanup as is. */
5159 /* Read in the die, but leave space to copy over the attributes
5160 from the stub. This has the benefit of simplifying the rest of
5161 the code - all the work to maintain the illusion of a single
5162 DW_TAG_{compile,type}_unit DIE is done here. */
5163 num_extra_attrs
= ((stmt_list
!= NULL
)
5167 + (comp_dir
!= NULL
));
5168 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5169 result_has_children
, num_extra_attrs
);
5171 /* Copy over the attributes from the stub to the DIE we just read in. */
5172 comp_unit_die
= *result_comp_unit_die
;
5173 i
= comp_unit_die
->num_attrs
;
5174 if (stmt_list
!= NULL
)
5175 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5177 comp_unit_die
->attrs
[i
++] = *low_pc
;
5178 if (high_pc
!= NULL
)
5179 comp_unit_die
->attrs
[i
++] = *high_pc
;
5181 comp_unit_die
->attrs
[i
++] = *ranges
;
5182 if (comp_dir
!= NULL
)
5183 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5184 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5186 if (dwarf2_die_debug
)
5188 fprintf_unfiltered (gdb_stdlog
,
5189 "Read die from %s@0x%x of %s:\n",
5190 get_section_name (section
),
5191 (unsigned) (begin_info_ptr
- section
->buffer
),
5192 bfd_get_filename (abfd
));
5193 dump_die (comp_unit_die
, dwarf2_die_debug
);
5196 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5197 TUs by skipping the stub and going directly to the entry in the DWO file.
5198 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5199 to get it via circuitous means. Blech. */
5200 if (comp_dir
!= NULL
)
5201 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5203 /* Skip dummy compilation units. */
5204 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5205 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5208 *result_info_ptr
= info_ptr
;
5212 /* Subroutine of init_cutu_and_read_dies to simplify it.
5213 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5214 Returns NULL if the specified DWO unit cannot be found. */
5216 static struct dwo_unit
*
5217 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5218 struct die_info
*comp_unit_die
)
5220 struct dwarf2_cu
*cu
= this_cu
->cu
;
5221 struct attribute
*attr
;
5223 struct dwo_unit
*dwo_unit
;
5224 const char *comp_dir
, *dwo_name
;
5226 gdb_assert (cu
!= NULL
);
5228 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5229 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5230 gdb_assert (attr
!= NULL
);
5231 dwo_name
= DW_STRING (attr
);
5233 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5235 comp_dir
= DW_STRING (attr
);
5237 if (this_cu
->is_debug_types
)
5239 struct signatured_type
*sig_type
;
5241 /* Since this_cu is the first member of struct signatured_type,
5242 we can go from a pointer to one to a pointer to the other. */
5243 sig_type
= (struct signatured_type
*) this_cu
;
5244 signature
= sig_type
->signature
;
5245 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5249 struct attribute
*attr
;
5251 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5253 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5255 dwo_name
, objfile_name (this_cu
->objfile
));
5256 signature
= DW_UNSND (attr
);
5257 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5264 /* Subroutine of init_cutu_and_read_dies to simplify it.
5265 See it for a description of the parameters.
5266 Read a TU directly from a DWO file, bypassing the stub.
5268 Note: This function could be a little bit simpler if we shared cleanups
5269 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5270 to do, so we keep this function self-contained. Or we could move this
5271 into our caller, but it's complex enough already. */
5274 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5275 int use_existing_cu
, int keep
,
5276 die_reader_func_ftype
*die_reader_func
,
5279 struct dwarf2_cu
*cu
;
5280 struct signatured_type
*sig_type
;
5281 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5282 struct die_reader_specs reader
;
5283 const gdb_byte
*info_ptr
;
5284 struct die_info
*comp_unit_die
;
5287 /* Verify we can do the following downcast, and that we have the
5289 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5290 sig_type
= (struct signatured_type
*) this_cu
;
5291 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5293 cleanups
= make_cleanup (null_cleanup
, NULL
);
5295 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5297 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5299 /* There's no need to do the rereading_dwo_cu handling that
5300 init_cutu_and_read_dies does since we don't read the stub. */
5304 /* If !use_existing_cu, this_cu->cu must be NULL. */
5305 gdb_assert (this_cu
->cu
== NULL
);
5306 cu
= xmalloc (sizeof (*cu
));
5307 init_one_comp_unit (cu
, this_cu
);
5308 /* If an error occurs while loading, release our storage. */
5309 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5312 /* A future optimization, if needed, would be to use an existing
5313 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5314 could share abbrev tables. */
5316 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5317 0 /* abbrev_table_provided */,
5318 NULL
/* stub_comp_unit_die */,
5319 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5321 &comp_unit_die
, &has_children
) == 0)
5324 do_cleanups (cleanups
);
5328 /* All the "real" work is done here. */
5329 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5331 /* This duplicates the code in init_cutu_and_read_dies,
5332 but the alternative is making the latter more complex.
5333 This function is only for the special case of using DWO files directly:
5334 no point in overly complicating the general case just to handle this. */
5335 if (free_cu_cleanup
!= NULL
)
5339 /* We've successfully allocated this compilation unit. Let our
5340 caller clean it up when finished with it. */
5341 discard_cleanups (free_cu_cleanup
);
5343 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5344 So we have to manually free the abbrev table. */
5345 dwarf2_free_abbrev_table (cu
);
5347 /* Link this CU into read_in_chain. */
5348 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5349 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5352 do_cleanups (free_cu_cleanup
);
5355 do_cleanups (cleanups
);
5358 /* Initialize a CU (or TU) and read its DIEs.
5359 If the CU defers to a DWO file, read the DWO file as well.
5361 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5362 Otherwise the table specified in the comp unit header is read in and used.
5363 This is an optimization for when we already have the abbrev table.
5365 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5366 Otherwise, a new CU is allocated with xmalloc.
5368 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5369 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5371 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5372 linker) then DIE_READER_FUNC will not get called. */
5375 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5376 struct abbrev_table
*abbrev_table
,
5377 int use_existing_cu
, int keep
,
5378 die_reader_func_ftype
*die_reader_func
,
5381 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5382 struct dwarf2_section_info
*section
= this_cu
->section
;
5383 bfd
*abfd
= get_section_bfd_owner (section
);
5384 struct dwarf2_cu
*cu
;
5385 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5386 struct die_reader_specs reader
;
5387 struct die_info
*comp_unit_die
;
5389 struct attribute
*attr
;
5390 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5391 struct signatured_type
*sig_type
= NULL
;
5392 struct dwarf2_section_info
*abbrev_section
;
5393 /* Non-zero if CU currently points to a DWO file and we need to
5394 reread it. When this happens we need to reread the skeleton die
5395 before we can reread the DWO file (this only applies to CUs, not TUs). */
5396 int rereading_dwo_cu
= 0;
5398 if (dwarf2_die_debug
)
5399 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5400 this_cu
->is_debug_types
? "type" : "comp",
5401 this_cu
->offset
.sect_off
);
5403 if (use_existing_cu
)
5406 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5407 file (instead of going through the stub), short-circuit all of this. */
5408 if (this_cu
->reading_dwo_directly
)
5410 /* Narrow down the scope of possibilities to have to understand. */
5411 gdb_assert (this_cu
->is_debug_types
);
5412 gdb_assert (abbrev_table
== NULL
);
5413 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5414 die_reader_func
, data
);
5418 cleanups
= make_cleanup (null_cleanup
, NULL
);
5420 /* This is cheap if the section is already read in. */
5421 dwarf2_read_section (objfile
, section
);
5423 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5425 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5427 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5430 /* If this CU is from a DWO file we need to start over, we need to
5431 refetch the attributes from the skeleton CU.
5432 This could be optimized by retrieving those attributes from when we
5433 were here the first time: the previous comp_unit_die was stored in
5434 comp_unit_obstack. But there's no data yet that we need this
5436 if (cu
->dwo_unit
!= NULL
)
5437 rereading_dwo_cu
= 1;
5441 /* If !use_existing_cu, this_cu->cu must be NULL. */
5442 gdb_assert (this_cu
->cu
== NULL
);
5443 cu
= xmalloc (sizeof (*cu
));
5444 init_one_comp_unit (cu
, this_cu
);
5445 /* If an error occurs while loading, release our storage. */
5446 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5449 /* Get the header. */
5450 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
5452 /* We already have the header, there's no need to read it in again. */
5453 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
5457 if (this_cu
->is_debug_types
)
5460 cu_offset type_offset_in_tu
;
5462 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
5463 abbrev_section
, info_ptr
,
5465 &type_offset_in_tu
);
5467 /* Since per_cu is the first member of struct signatured_type,
5468 we can go from a pointer to one to a pointer to the other. */
5469 sig_type
= (struct signatured_type
*) this_cu
;
5470 gdb_assert (sig_type
->signature
== signature
);
5471 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
5472 == type_offset_in_tu
.cu_off
);
5473 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5475 /* LENGTH has not been set yet for type units if we're
5476 using .gdb_index. */
5477 this_cu
->length
= get_cu_length (&cu
->header
);
5479 /* Establish the type offset that can be used to lookup the type. */
5480 sig_type
->type_offset_in_section
.sect_off
=
5481 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
5485 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5489 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
5490 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5494 /* Skip dummy compilation units. */
5495 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5496 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5498 do_cleanups (cleanups
);
5502 /* If we don't have them yet, read the abbrevs for this compilation unit.
5503 And if we need to read them now, make sure they're freed when we're
5504 done. Note that it's important that if the CU had an abbrev table
5505 on entry we don't free it when we're done: Somewhere up the call stack
5506 it may be in use. */
5507 if (abbrev_table
!= NULL
)
5509 gdb_assert (cu
->abbrev_table
== NULL
);
5510 gdb_assert (cu
->header
.abbrev_offset
.sect_off
5511 == abbrev_table
->offset
.sect_off
);
5512 cu
->abbrev_table
= abbrev_table
;
5514 else if (cu
->abbrev_table
== NULL
)
5516 dwarf2_read_abbrevs (cu
, abbrev_section
);
5517 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5519 else if (rereading_dwo_cu
)
5521 dwarf2_free_abbrev_table (cu
);
5522 dwarf2_read_abbrevs (cu
, abbrev_section
);
5525 /* Read the top level CU/TU die. */
5526 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5527 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5529 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5531 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5532 DWO CU, that this test will fail (the attribute will not be present). */
5533 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5536 struct dwo_unit
*dwo_unit
;
5537 struct die_info
*dwo_comp_unit_die
;
5541 complaint (&symfile_complaints
,
5542 _("compilation unit with DW_AT_GNU_dwo_name"
5543 " has children (offset 0x%x) [in module %s]"),
5544 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
5546 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5547 if (dwo_unit
!= NULL
)
5549 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5550 abbrev_table
!= NULL
,
5551 comp_unit_die
, NULL
,
5553 &dwo_comp_unit_die
, &has_children
) == 0)
5556 do_cleanups (cleanups
);
5559 comp_unit_die
= dwo_comp_unit_die
;
5563 /* Yikes, we couldn't find the rest of the DIE, we only have
5564 the stub. A complaint has already been logged. There's
5565 not much more we can do except pass on the stub DIE to
5566 die_reader_func. We don't want to throw an error on bad
5571 /* All of the above is setup for this call. Yikes. */
5572 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5574 /* Done, clean up. */
5575 if (free_cu_cleanup
!= NULL
)
5579 /* We've successfully allocated this compilation unit. Let our
5580 caller clean it up when finished with it. */
5581 discard_cleanups (free_cu_cleanup
);
5583 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5584 So we have to manually free the abbrev table. */
5585 dwarf2_free_abbrev_table (cu
);
5587 /* Link this CU into read_in_chain. */
5588 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5589 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5592 do_cleanups (free_cu_cleanup
);
5595 do_cleanups (cleanups
);
5598 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5599 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5600 to have already done the lookup to find the DWO file).
5602 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5603 THIS_CU->is_debug_types, but nothing else.
5605 We fill in THIS_CU->length.
5607 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5608 linker) then DIE_READER_FUNC will not get called.
5610 THIS_CU->cu is always freed when done.
5611 This is done in order to not leave THIS_CU->cu in a state where we have
5612 to care whether it refers to the "main" CU or the DWO CU. */
5615 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5616 struct dwo_file
*dwo_file
,
5617 die_reader_func_ftype
*die_reader_func
,
5620 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5621 struct dwarf2_section_info
*section
= this_cu
->section
;
5622 bfd
*abfd
= get_section_bfd_owner (section
);
5623 struct dwarf2_section_info
*abbrev_section
;
5624 struct dwarf2_cu cu
;
5625 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5626 struct die_reader_specs reader
;
5627 struct cleanup
*cleanups
;
5628 struct die_info
*comp_unit_die
;
5631 if (dwarf2_die_debug
)
5632 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5633 this_cu
->is_debug_types
? "type" : "comp",
5634 this_cu
->offset
.sect_off
);
5636 gdb_assert (this_cu
->cu
== NULL
);
5638 abbrev_section
= (dwo_file
!= NULL
5639 ? &dwo_file
->sections
.abbrev
5640 : get_abbrev_section_for_cu (this_cu
));
5642 /* This is cheap if the section is already read in. */
5643 dwarf2_read_section (objfile
, section
);
5645 init_one_comp_unit (&cu
, this_cu
);
5647 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5649 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
5650 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5651 abbrev_section
, info_ptr
,
5652 this_cu
->is_debug_types
);
5654 this_cu
->length
= get_cu_length (&cu
.header
);
5656 /* Skip dummy compilation units. */
5657 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5658 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5660 do_cleanups (cleanups
);
5664 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5665 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5667 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5668 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5670 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5672 do_cleanups (cleanups
);
5675 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5676 does not lookup the specified DWO file.
5677 This cannot be used to read DWO files.
5679 THIS_CU->cu is always freed when done.
5680 This is done in order to not leave THIS_CU->cu in a state where we have
5681 to care whether it refers to the "main" CU or the DWO CU.
5682 We can revisit this if the data shows there's a performance issue. */
5685 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5686 die_reader_func_ftype
*die_reader_func
,
5689 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5692 /* Type Unit Groups.
5694 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5695 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5696 so that all types coming from the same compilation (.o file) are grouped
5697 together. A future step could be to put the types in the same symtab as
5698 the CU the types ultimately came from. */
5701 hash_type_unit_group (const void *item
)
5703 const struct type_unit_group
*tu_group
= item
;
5705 return hash_stmt_list_entry (&tu_group
->hash
);
5709 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
5711 const struct type_unit_group
*lhs
= item_lhs
;
5712 const struct type_unit_group
*rhs
= item_rhs
;
5714 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
5717 /* Allocate a hash table for type unit groups. */
5720 allocate_type_unit_groups_table (void)
5722 return htab_create_alloc_ex (3,
5723 hash_type_unit_group
,
5726 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
5727 hashtab_obstack_allocate
,
5728 dummy_obstack_deallocate
);
5731 /* Type units that don't have DW_AT_stmt_list are grouped into their own
5732 partial symtabs. We combine several TUs per psymtab to not let the size
5733 of any one psymtab grow too big. */
5734 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
5735 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
5737 /* Helper routine for get_type_unit_group.
5738 Create the type_unit_group object used to hold one or more TUs. */
5740 static struct type_unit_group
*
5741 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
5743 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5744 struct dwarf2_per_cu_data
*per_cu
;
5745 struct type_unit_group
*tu_group
;
5747 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5748 struct type_unit_group
);
5749 per_cu
= &tu_group
->per_cu
;
5750 per_cu
->objfile
= objfile
;
5752 if (dwarf2_per_objfile
->using_index
)
5754 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5755 struct dwarf2_per_cu_quick_data
);
5759 unsigned int line_offset
= line_offset_struct
.sect_off
;
5760 struct partial_symtab
*pst
;
5763 /* Give the symtab a useful name for debug purposes. */
5764 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
5765 name
= xstrprintf ("<type_units_%d>",
5766 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
5768 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
5770 pst
= create_partial_symtab (per_cu
, name
);
5776 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
5777 tu_group
->hash
.line_offset
= line_offset_struct
;
5782 /* Look up the type_unit_group for type unit CU, and create it if necessary.
5783 STMT_LIST is a DW_AT_stmt_list attribute. */
5785 static struct type_unit_group
*
5786 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
5788 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5789 struct type_unit_group
*tu_group
;
5791 unsigned int line_offset
;
5792 struct type_unit_group type_unit_group_for_lookup
;
5794 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
5796 dwarf2_per_objfile
->type_unit_groups
=
5797 allocate_type_unit_groups_table ();
5800 /* Do we need to create a new group, or can we use an existing one? */
5804 line_offset
= DW_UNSND (stmt_list
);
5805 ++tu_stats
->nr_symtab_sharers
;
5809 /* Ugh, no stmt_list. Rare, but we have to handle it.
5810 We can do various things here like create one group per TU or
5811 spread them over multiple groups to split up the expansion work.
5812 To avoid worst case scenarios (too many groups or too large groups)
5813 we, umm, group them in bunches. */
5814 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5815 | (tu_stats
->nr_stmt_less_type_units
5816 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5817 ++tu_stats
->nr_stmt_less_type_units
;
5820 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5821 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5822 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5823 &type_unit_group_for_lookup
, INSERT
);
5827 gdb_assert (tu_group
!= NULL
);
5831 sect_offset line_offset_struct
;
5833 line_offset_struct
.sect_off
= line_offset
;
5834 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5836 ++tu_stats
->nr_symtabs
;
5842 /* Partial symbol tables. */
5844 /* Create a psymtab named NAME and assign it to PER_CU.
5846 The caller must fill in the following details:
5847 dirname, textlow, texthigh. */
5849 static struct partial_symtab
*
5850 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
5852 struct objfile
*objfile
= per_cu
->objfile
;
5853 struct partial_symtab
*pst
;
5855 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
5857 objfile
->global_psymbols
.next
,
5858 objfile
->static_psymbols
.next
);
5860 pst
->psymtabs_addrmap_supported
= 1;
5862 /* This is the glue that links PST into GDB's symbol API. */
5863 pst
->read_symtab_private
= per_cu
;
5864 pst
->read_symtab
= dwarf2_read_symtab
;
5865 per_cu
->v
.psymtab
= pst
;
5870 /* The DATA object passed to process_psymtab_comp_unit_reader has this
5873 struct process_psymtab_comp_unit_data
5875 /* True if we are reading a DW_TAG_partial_unit. */
5877 int want_partial_unit
;
5879 /* The "pretend" language that is used if the CU doesn't declare a
5882 enum language pretend_language
;
5885 /* die_reader_func for process_psymtab_comp_unit. */
5888 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
5889 const gdb_byte
*info_ptr
,
5890 struct die_info
*comp_unit_die
,
5894 struct dwarf2_cu
*cu
= reader
->cu
;
5895 struct objfile
*objfile
= cu
->objfile
;
5896 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5897 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5898 struct attribute
*attr
;
5900 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
5901 struct partial_symtab
*pst
;
5903 const char *filename
;
5904 struct process_psymtab_comp_unit_data
*info
= data
;
5906 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
5909 gdb_assert (! per_cu
->is_debug_types
);
5911 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
5913 cu
->list_in_scope
= &file_symbols
;
5915 /* Allocate a new partial symbol table structure. */
5916 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
5917 if (attr
== NULL
|| !DW_STRING (attr
))
5920 filename
= DW_STRING (attr
);
5922 pst
= create_partial_symtab (per_cu
, filename
);
5924 /* This must be done before calling dwarf2_build_include_psymtabs. */
5925 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5927 pst
->dirname
= DW_STRING (attr
);
5929 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5931 dwarf2_find_base_address (comp_unit_die
, cu
);
5933 /* Possibly set the default values of LOWPC and HIGHPC from
5935 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
5936 &best_highpc
, cu
, pst
);
5937 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
5938 /* Store the contiguous range if it is not empty; it can be empty for
5939 CUs with no code. */
5940 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5941 gdbarch_adjust_dwarf2_addr (gdbarch
,
5942 best_lowpc
+ baseaddr
),
5943 gdbarch_adjust_dwarf2_addr (gdbarch
,
5944 best_highpc
+ baseaddr
) - 1,
5947 /* Check if comp unit has_children.
5948 If so, read the rest of the partial symbols from this comp unit.
5949 If not, there's no more debug_info for this comp unit. */
5952 struct partial_die_info
*first_die
;
5953 CORE_ADDR lowpc
, highpc
;
5955 lowpc
= ((CORE_ADDR
) -1);
5956 highpc
= ((CORE_ADDR
) 0);
5958 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5960 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
5963 /* If we didn't find a lowpc, set it to highpc to avoid
5964 complaints from `maint check'. */
5965 if (lowpc
== ((CORE_ADDR
) -1))
5968 /* If the compilation unit didn't have an explicit address range,
5969 then use the information extracted from its child dies. */
5973 best_highpc
= highpc
;
5976 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
5977 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
5979 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5980 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5981 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5982 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5983 sort_pst_symbols (objfile
, pst
);
5985 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
5988 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
5989 struct dwarf2_per_cu_data
*iter
;
5991 /* Fill in 'dependencies' here; we fill in 'users' in a
5993 pst
->number_of_dependencies
= len
;
5994 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5995 len
* sizeof (struct symtab
*));
5997 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6000 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6002 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6005 /* Get the list of files included in the current compilation unit,
6006 and build a psymtab for each of them. */
6007 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6009 if (dwarf2_read_debug
)
6011 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6013 fprintf_unfiltered (gdb_stdlog
,
6014 "Psymtab for %s unit @0x%x: %s - %s"
6015 ", %d global, %d static syms\n",
6016 per_cu
->is_debug_types
? "type" : "comp",
6017 per_cu
->offset
.sect_off
,
6018 paddress (gdbarch
, pst
->textlow
),
6019 paddress (gdbarch
, pst
->texthigh
),
6020 pst
->n_global_syms
, pst
->n_static_syms
);
6024 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6025 Process compilation unit THIS_CU for a psymtab. */
6028 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6029 int want_partial_unit
,
6030 enum language pretend_language
)
6032 struct process_psymtab_comp_unit_data info
;
6034 /* If this compilation unit was already read in, free the
6035 cached copy in order to read it in again. This is
6036 necessary because we skipped some symbols when we first
6037 read in the compilation unit (see load_partial_dies).
6038 This problem could be avoided, but the benefit is unclear. */
6039 if (this_cu
->cu
!= NULL
)
6040 free_one_cached_comp_unit (this_cu
);
6042 gdb_assert (! this_cu
->is_debug_types
);
6043 info
.want_partial_unit
= want_partial_unit
;
6044 info
.pretend_language
= pretend_language
;
6045 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6046 process_psymtab_comp_unit_reader
,
6049 /* Age out any secondary CUs. */
6050 age_cached_comp_units ();
6053 /* Reader function for build_type_psymtabs. */
6056 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6057 const gdb_byte
*info_ptr
,
6058 struct die_info
*type_unit_die
,
6062 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6063 struct dwarf2_cu
*cu
= reader
->cu
;
6064 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6065 struct signatured_type
*sig_type
;
6066 struct type_unit_group
*tu_group
;
6067 struct attribute
*attr
;
6068 struct partial_die_info
*first_die
;
6069 CORE_ADDR lowpc
, highpc
;
6070 struct partial_symtab
*pst
;
6072 gdb_assert (data
== NULL
);
6073 gdb_assert (per_cu
->is_debug_types
);
6074 sig_type
= (struct signatured_type
*) per_cu
;
6079 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6080 tu_group
= get_type_unit_group (cu
, attr
);
6082 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6084 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6085 cu
->list_in_scope
= &file_symbols
;
6086 pst
= create_partial_symtab (per_cu
, "");
6089 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6091 lowpc
= (CORE_ADDR
) -1;
6092 highpc
= (CORE_ADDR
) 0;
6093 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6095 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
6096 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
6097 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
6098 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
6099 sort_pst_symbols (objfile
, pst
);
6102 /* Struct used to sort TUs by their abbreviation table offset. */
6104 struct tu_abbrev_offset
6106 struct signatured_type
*sig_type
;
6107 sect_offset abbrev_offset
;
6110 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6113 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6115 const struct tu_abbrev_offset
* const *a
= ap
;
6116 const struct tu_abbrev_offset
* const *b
= bp
;
6117 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
6118 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
6120 return (aoff
> boff
) - (aoff
< boff
);
6123 /* Efficiently read all the type units.
6124 This does the bulk of the work for build_type_psymtabs.
6126 The efficiency is because we sort TUs by the abbrev table they use and
6127 only read each abbrev table once. In one program there are 200K TUs
6128 sharing 8K abbrev tables.
6130 The main purpose of this function is to support building the
6131 dwarf2_per_objfile->type_unit_groups table.
6132 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6133 can collapse the search space by grouping them by stmt_list.
6134 The savings can be significant, in the same program from above the 200K TUs
6135 share 8K stmt_list tables.
6137 FUNC is expected to call get_type_unit_group, which will create the
6138 struct type_unit_group if necessary and add it to
6139 dwarf2_per_objfile->type_unit_groups. */
6142 build_type_psymtabs_1 (void)
6144 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6145 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6146 struct cleanup
*cleanups
;
6147 struct abbrev_table
*abbrev_table
;
6148 sect_offset abbrev_offset
;
6149 struct tu_abbrev_offset
*sorted_by_abbrev
;
6150 struct type_unit_group
**iter
;
6153 /* It's up to the caller to not call us multiple times. */
6154 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6156 if (dwarf2_per_objfile
->n_type_units
== 0)
6159 /* TUs typically share abbrev tables, and there can be way more TUs than
6160 abbrev tables. Sort by abbrev table to reduce the number of times we
6161 read each abbrev table in.
6162 Alternatives are to punt or to maintain a cache of abbrev tables.
6163 This is simpler and efficient enough for now.
6165 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6166 symtab to use). Typically TUs with the same abbrev offset have the same
6167 stmt_list value too so in practice this should work well.
6169 The basic algorithm here is:
6171 sort TUs by abbrev table
6172 for each TU with same abbrev table:
6173 read abbrev table if first user
6174 read TU top level DIE
6175 [IWBN if DWO skeletons had DW_AT_stmt_list]
6178 if (dwarf2_read_debug
)
6179 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6181 /* Sort in a separate table to maintain the order of all_type_units
6182 for .gdb_index: TU indices directly index all_type_units. */
6183 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6184 dwarf2_per_objfile
->n_type_units
);
6185 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6187 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6189 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6190 sorted_by_abbrev
[i
].abbrev_offset
=
6191 read_abbrev_offset (sig_type
->per_cu
.section
,
6192 sig_type
->per_cu
.offset
);
6194 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6195 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6196 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6198 abbrev_offset
.sect_off
= ~(unsigned) 0;
6199 abbrev_table
= NULL
;
6200 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6202 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6204 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6206 /* Switch to the next abbrev table if necessary. */
6207 if (abbrev_table
== NULL
6208 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
6210 if (abbrev_table
!= NULL
)
6212 abbrev_table_free (abbrev_table
);
6213 /* Reset to NULL in case abbrev_table_read_table throws
6214 an error: abbrev_table_free_cleanup will get called. */
6215 abbrev_table
= NULL
;
6217 abbrev_offset
= tu
->abbrev_offset
;
6219 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6221 ++tu_stats
->nr_uniq_abbrev_tables
;
6224 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6225 build_type_psymtabs_reader
, NULL
);
6228 do_cleanups (cleanups
);
6231 /* Print collected type unit statistics. */
6234 print_tu_stats (void)
6236 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6238 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6239 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6240 dwarf2_per_objfile
->n_type_units
);
6241 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6242 tu_stats
->nr_uniq_abbrev_tables
);
6243 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6244 tu_stats
->nr_symtabs
);
6245 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6246 tu_stats
->nr_symtab_sharers
);
6247 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6248 tu_stats
->nr_stmt_less_type_units
);
6249 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6250 tu_stats
->nr_all_type_units_reallocs
);
6253 /* Traversal function for build_type_psymtabs. */
6256 build_type_psymtab_dependencies (void **slot
, void *info
)
6258 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6259 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6260 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6261 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6262 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6263 struct signatured_type
*iter
;
6266 gdb_assert (len
> 0);
6267 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6269 pst
->number_of_dependencies
= len
;
6270 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
6271 len
* sizeof (struct psymtab
*));
6273 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6276 gdb_assert (iter
->per_cu
.is_debug_types
);
6277 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6278 iter
->type_unit_group
= tu_group
;
6281 VEC_free (sig_type_ptr
, tu_group
->tus
);
6286 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6287 Build partial symbol tables for the .debug_types comp-units. */
6290 build_type_psymtabs (struct objfile
*objfile
)
6292 if (! create_all_type_units (objfile
))
6295 build_type_psymtabs_1 ();
6298 /* Traversal function for process_skeletonless_type_unit.
6299 Read a TU in a DWO file and build partial symbols for it. */
6302 process_skeletonless_type_unit (void **slot
, void *info
)
6304 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6305 struct objfile
*objfile
= info
;
6306 struct signatured_type find_entry
, *entry
;
6308 /* If this TU doesn't exist in the global table, add it and read it in. */
6310 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6312 dwarf2_per_objfile
->signatured_types
6313 = allocate_signatured_type_table (objfile
);
6316 find_entry
.signature
= dwo_unit
->signature
;
6317 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6319 /* If we've already seen this type there's nothing to do. What's happening
6320 is we're doing our own version of comdat-folding here. */
6324 /* This does the job that create_all_type_units would have done for
6326 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6327 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6330 /* This does the job that build_type_psymtabs_1 would have done. */
6331 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6332 build_type_psymtabs_reader
, NULL
);
6337 /* Traversal function for process_skeletonless_type_units. */
6340 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6342 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6344 if (dwo_file
->tus
!= NULL
)
6346 htab_traverse_noresize (dwo_file
->tus
,
6347 process_skeletonless_type_unit
, info
);
6353 /* Scan all TUs of DWO files, verifying we've processed them.
6354 This is needed in case a TU was emitted without its skeleton.
6355 Note: This can't be done until we know what all the DWO files are. */
6358 process_skeletonless_type_units (struct objfile
*objfile
)
6360 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6361 if (get_dwp_file () == NULL
6362 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6364 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6365 process_dwo_file_for_skeletonless_type_units
,
6370 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6373 psymtabs_addrmap_cleanup (void *o
)
6375 struct objfile
*objfile
= o
;
6377 objfile
->psymtabs_addrmap
= NULL
;
6380 /* Compute the 'user' field for each psymtab in OBJFILE. */
6383 set_partial_user (struct objfile
*objfile
)
6387 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6389 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6390 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6396 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6398 /* Set the 'user' field only if it is not already set. */
6399 if (pst
->dependencies
[j
]->user
== NULL
)
6400 pst
->dependencies
[j
]->user
= pst
;
6405 /* Build the partial symbol table by doing a quick pass through the
6406 .debug_info and .debug_abbrev sections. */
6409 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6411 struct cleanup
*back_to
, *addrmap_cleanup
;
6412 struct obstack temp_obstack
;
6415 if (dwarf2_read_debug
)
6417 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6418 objfile_name (objfile
));
6421 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6423 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6425 /* Any cached compilation units will be linked by the per-objfile
6426 read_in_chain. Make sure to free them when we're done. */
6427 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6429 build_type_psymtabs (objfile
);
6431 create_all_comp_units (objfile
);
6433 /* Create a temporary address map on a temporary obstack. We later
6434 copy this to the final obstack. */
6435 obstack_init (&temp_obstack
);
6436 make_cleanup_obstack_free (&temp_obstack
);
6437 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6438 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6440 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6442 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6444 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6447 /* This has to wait until we read the CUs, we need the list of DWOs. */
6448 process_skeletonless_type_units (objfile
);
6450 /* Now that all TUs have been processed we can fill in the dependencies. */
6451 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6453 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6454 build_type_psymtab_dependencies
, NULL
);
6457 if (dwarf2_read_debug
)
6460 set_partial_user (objfile
);
6462 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6463 &objfile
->objfile_obstack
);
6464 discard_cleanups (addrmap_cleanup
);
6466 do_cleanups (back_to
);
6468 if (dwarf2_read_debug
)
6469 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6470 objfile_name (objfile
));
6473 /* die_reader_func for load_partial_comp_unit. */
6476 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6477 const gdb_byte
*info_ptr
,
6478 struct die_info
*comp_unit_die
,
6482 struct dwarf2_cu
*cu
= reader
->cu
;
6484 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6486 /* Check if comp unit has_children.
6487 If so, read the rest of the partial symbols from this comp unit.
6488 If not, there's no more debug_info for this comp unit. */
6490 load_partial_dies (reader
, info_ptr
, 0);
6493 /* Load the partial DIEs for a secondary CU into memory.
6494 This is also used when rereading a primary CU with load_all_dies. */
6497 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6499 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6500 load_partial_comp_unit_reader
, NULL
);
6504 read_comp_units_from_section (struct objfile
*objfile
,
6505 struct dwarf2_section_info
*section
,
6506 unsigned int is_dwz
,
6509 struct dwarf2_per_cu_data
***all_comp_units
)
6511 const gdb_byte
*info_ptr
;
6512 bfd
*abfd
= get_section_bfd_owner (section
);
6514 if (dwarf2_read_debug
)
6515 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6516 get_section_name (section
),
6517 get_section_file_name (section
));
6519 dwarf2_read_section (objfile
, section
);
6521 info_ptr
= section
->buffer
;
6523 while (info_ptr
< section
->buffer
+ section
->size
)
6525 unsigned int length
, initial_length_size
;
6526 struct dwarf2_per_cu_data
*this_cu
;
6529 offset
.sect_off
= info_ptr
- section
->buffer
;
6531 /* Read just enough information to find out where the next
6532 compilation unit is. */
6533 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6535 /* Save the compilation unit for later lookup. */
6536 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
6537 sizeof (struct dwarf2_per_cu_data
));
6538 memset (this_cu
, 0, sizeof (*this_cu
));
6539 this_cu
->offset
= offset
;
6540 this_cu
->length
= length
+ initial_length_size
;
6541 this_cu
->is_dwz
= is_dwz
;
6542 this_cu
->objfile
= objfile
;
6543 this_cu
->section
= section
;
6545 if (*n_comp_units
== *n_allocated
)
6548 *all_comp_units
= xrealloc (*all_comp_units
,
6550 * sizeof (struct dwarf2_per_cu_data
*));
6552 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6555 info_ptr
= info_ptr
+ this_cu
->length
;
6559 /* Create a list of all compilation units in OBJFILE.
6560 This is only done for -readnow and building partial symtabs. */
6563 create_all_comp_units (struct objfile
*objfile
)
6567 struct dwarf2_per_cu_data
**all_comp_units
;
6568 struct dwz_file
*dwz
;
6572 all_comp_units
= xmalloc (n_allocated
6573 * sizeof (struct dwarf2_per_cu_data
*));
6575 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
6576 &n_allocated
, &n_comp_units
, &all_comp_units
);
6578 dwz
= dwarf2_get_dwz_file ();
6580 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
6581 &n_allocated
, &n_comp_units
,
6584 dwarf2_per_objfile
->all_comp_units
6585 = obstack_alloc (&objfile
->objfile_obstack
,
6586 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6587 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6588 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6589 xfree (all_comp_units
);
6590 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6593 /* Process all loaded DIEs for compilation unit CU, starting at
6594 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6595 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6596 DW_AT_ranges). See the comments of add_partial_subprogram on how
6597 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6600 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6601 CORE_ADDR
*highpc
, int set_addrmap
,
6602 struct dwarf2_cu
*cu
)
6604 struct partial_die_info
*pdi
;
6606 /* Now, march along the PDI's, descending into ones which have
6607 interesting children but skipping the children of the other ones,
6608 until we reach the end of the compilation unit. */
6614 fixup_partial_die (pdi
, cu
);
6616 /* Anonymous namespaces or modules have no name but have interesting
6617 children, so we need to look at them. Ditto for anonymous
6620 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6621 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6622 || pdi
->tag
== DW_TAG_imported_unit
)
6626 case DW_TAG_subprogram
:
6627 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6629 case DW_TAG_constant
:
6630 case DW_TAG_variable
:
6631 case DW_TAG_typedef
:
6632 case DW_TAG_union_type
:
6633 if (!pdi
->is_declaration
)
6635 add_partial_symbol (pdi
, cu
);
6638 case DW_TAG_class_type
:
6639 case DW_TAG_interface_type
:
6640 case DW_TAG_structure_type
:
6641 if (!pdi
->is_declaration
)
6643 add_partial_symbol (pdi
, cu
);
6646 case DW_TAG_enumeration_type
:
6647 if (!pdi
->is_declaration
)
6648 add_partial_enumeration (pdi
, cu
);
6650 case DW_TAG_base_type
:
6651 case DW_TAG_subrange_type
:
6652 /* File scope base type definitions are added to the partial
6654 add_partial_symbol (pdi
, cu
);
6656 case DW_TAG_namespace
:
6657 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6660 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6662 case DW_TAG_imported_unit
:
6664 struct dwarf2_per_cu_data
*per_cu
;
6666 /* For now we don't handle imported units in type units. */
6667 if (cu
->per_cu
->is_debug_types
)
6669 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6670 " supported in type units [in module %s]"),
6671 objfile_name (cu
->objfile
));
6674 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
6678 /* Go read the partial unit, if needed. */
6679 if (per_cu
->v
.psymtab
== NULL
)
6680 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6682 VEC_safe_push (dwarf2_per_cu_ptr
,
6683 cu
->per_cu
->imported_symtabs
, per_cu
);
6686 case DW_TAG_imported_declaration
:
6687 add_partial_symbol (pdi
, cu
);
6694 /* If the die has a sibling, skip to the sibling. */
6696 pdi
= pdi
->die_sibling
;
6700 /* Functions used to compute the fully scoped name of a partial DIE.
6702 Normally, this is simple. For C++, the parent DIE's fully scoped
6703 name is concatenated with "::" and the partial DIE's name. For
6704 Java, the same thing occurs except that "." is used instead of "::".
6705 Enumerators are an exception; they use the scope of their parent
6706 enumeration type, i.e. the name of the enumeration type is not
6707 prepended to the enumerator.
6709 There are two complexities. One is DW_AT_specification; in this
6710 case "parent" means the parent of the target of the specification,
6711 instead of the direct parent of the DIE. The other is compilers
6712 which do not emit DW_TAG_namespace; in this case we try to guess
6713 the fully qualified name of structure types from their members'
6714 linkage names. This must be done using the DIE's children rather
6715 than the children of any DW_AT_specification target. We only need
6716 to do this for structures at the top level, i.e. if the target of
6717 any DW_AT_specification (if any; otherwise the DIE itself) does not
6720 /* Compute the scope prefix associated with PDI's parent, in
6721 compilation unit CU. The result will be allocated on CU's
6722 comp_unit_obstack, or a copy of the already allocated PDI->NAME
6723 field. NULL is returned if no prefix is necessary. */
6725 partial_die_parent_scope (struct partial_die_info
*pdi
,
6726 struct dwarf2_cu
*cu
)
6728 const char *grandparent_scope
;
6729 struct partial_die_info
*parent
, *real_pdi
;
6731 /* We need to look at our parent DIE; if we have a DW_AT_specification,
6732 then this means the parent of the specification DIE. */
6735 while (real_pdi
->has_specification
)
6736 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
6737 real_pdi
->spec_is_dwz
, cu
);
6739 parent
= real_pdi
->die_parent
;
6743 if (parent
->scope_set
)
6744 return parent
->scope
;
6746 fixup_partial_die (parent
, cu
);
6748 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
6750 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
6751 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
6752 Work around this problem here. */
6753 if (cu
->language
== language_cplus
6754 && parent
->tag
== DW_TAG_namespace
6755 && strcmp (parent
->name
, "::") == 0
6756 && grandparent_scope
== NULL
)
6758 parent
->scope
= NULL
;
6759 parent
->scope_set
= 1;
6763 if (pdi
->tag
== DW_TAG_enumerator
)
6764 /* Enumerators should not get the name of the enumeration as a prefix. */
6765 parent
->scope
= grandparent_scope
;
6766 else if (parent
->tag
== DW_TAG_namespace
6767 || parent
->tag
== DW_TAG_module
6768 || parent
->tag
== DW_TAG_structure_type
6769 || parent
->tag
== DW_TAG_class_type
6770 || parent
->tag
== DW_TAG_interface_type
6771 || parent
->tag
== DW_TAG_union_type
6772 || parent
->tag
== DW_TAG_enumeration_type
)
6774 if (grandparent_scope
== NULL
)
6775 parent
->scope
= parent
->name
;
6777 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
6779 parent
->name
, 0, cu
);
6783 /* FIXME drow/2004-04-01: What should we be doing with
6784 function-local names? For partial symbols, we should probably be
6786 complaint (&symfile_complaints
,
6787 _("unhandled containing DIE tag %d for DIE at %d"),
6788 parent
->tag
, pdi
->offset
.sect_off
);
6789 parent
->scope
= grandparent_scope
;
6792 parent
->scope_set
= 1;
6793 return parent
->scope
;
6796 /* Return the fully scoped name associated with PDI, from compilation unit
6797 CU. The result will be allocated with malloc. */
6800 partial_die_full_name (struct partial_die_info
*pdi
,
6801 struct dwarf2_cu
*cu
)
6803 const char *parent_scope
;
6805 /* If this is a template instantiation, we can not work out the
6806 template arguments from partial DIEs. So, unfortunately, we have
6807 to go through the full DIEs. At least any work we do building
6808 types here will be reused if full symbols are loaded later. */
6809 if (pdi
->has_template_arguments
)
6811 fixup_partial_die (pdi
, cu
);
6813 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
6815 struct die_info
*die
;
6816 struct attribute attr
;
6817 struct dwarf2_cu
*ref_cu
= cu
;
6819 /* DW_FORM_ref_addr is using section offset. */
6821 attr
.form
= DW_FORM_ref_addr
;
6822 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
6823 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
6825 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
6829 parent_scope
= partial_die_parent_scope (pdi
, cu
);
6830 if (parent_scope
== NULL
)
6833 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
6837 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
6839 struct objfile
*objfile
= cu
->objfile
;
6840 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6842 const char *actual_name
= NULL
;
6844 char *built_actual_name
;
6846 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6848 built_actual_name
= partial_die_full_name (pdi
, cu
);
6849 if (built_actual_name
!= NULL
)
6850 actual_name
= built_actual_name
;
6852 if (actual_name
== NULL
)
6853 actual_name
= pdi
->name
;
6857 case DW_TAG_subprogram
:
6858 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
6859 if (pdi
->is_external
|| cu
->language
== language_ada
)
6861 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
6862 of the global scope. But in Ada, we want to be able to access
6863 nested procedures globally. So all Ada subprograms are stored
6864 in the global scope. */
6865 /* prim_record_minimal_symbol (actual_name, addr, mst_text,
6867 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6868 built_actual_name
!= NULL
,
6869 VAR_DOMAIN
, LOC_BLOCK
,
6870 &objfile
->global_psymbols
,
6871 0, addr
, cu
->language
, objfile
);
6875 /* prim_record_minimal_symbol (actual_name, addr, mst_file_text,
6877 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6878 built_actual_name
!= NULL
,
6879 VAR_DOMAIN
, LOC_BLOCK
,
6880 &objfile
->static_psymbols
,
6881 0, addr
, cu
->language
, objfile
);
6884 case DW_TAG_constant
:
6886 struct psymbol_allocation_list
*list
;
6888 if (pdi
->is_external
)
6889 list
= &objfile
->global_psymbols
;
6891 list
= &objfile
->static_psymbols
;
6892 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6893 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
6894 list
, 0, 0, cu
->language
, objfile
);
6897 case DW_TAG_variable
:
6899 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
6903 && !dwarf2_per_objfile
->has_section_at_zero
)
6905 /* A global or static variable may also have been stripped
6906 out by the linker if unused, in which case its address
6907 will be nullified; do not add such variables into partial
6908 symbol table then. */
6910 else if (pdi
->is_external
)
6913 Don't enter into the minimal symbol tables as there is
6914 a minimal symbol table entry from the ELF symbols already.
6915 Enter into partial symbol table if it has a location
6916 descriptor or a type.
6917 If the location descriptor is missing, new_symbol will create
6918 a LOC_UNRESOLVED symbol, the address of the variable will then
6919 be determined from the minimal symbol table whenever the variable
6921 The address for the partial symbol table entry is not
6922 used by GDB, but it comes in handy for debugging partial symbol
6925 if (pdi
->d
.locdesc
|| pdi
->has_type
)
6926 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6927 built_actual_name
!= NULL
,
6928 VAR_DOMAIN
, LOC_STATIC
,
6929 &objfile
->global_psymbols
,
6931 cu
->language
, objfile
);
6935 /* Static Variable. Skip symbols without location descriptors. */
6936 if (pdi
->d
.locdesc
== NULL
)
6938 xfree (built_actual_name
);
6941 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
6942 mst_file_data, objfile); */
6943 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6944 built_actual_name
!= NULL
,
6945 VAR_DOMAIN
, LOC_STATIC
,
6946 &objfile
->static_psymbols
,
6948 cu
->language
, objfile
);
6951 case DW_TAG_typedef
:
6952 case DW_TAG_base_type
:
6953 case DW_TAG_subrange_type
:
6954 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6955 built_actual_name
!= NULL
,
6956 VAR_DOMAIN
, LOC_TYPEDEF
,
6957 &objfile
->static_psymbols
,
6958 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6960 case DW_TAG_imported_declaration
:
6961 case DW_TAG_namespace
:
6962 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6963 built_actual_name
!= NULL
,
6964 VAR_DOMAIN
, LOC_TYPEDEF
,
6965 &objfile
->global_psymbols
,
6966 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6969 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6970 built_actual_name
!= NULL
,
6971 MODULE_DOMAIN
, LOC_TYPEDEF
,
6972 &objfile
->global_psymbols
,
6973 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
6975 case DW_TAG_class_type
:
6976 case DW_TAG_interface_type
:
6977 case DW_TAG_structure_type
:
6978 case DW_TAG_union_type
:
6979 case DW_TAG_enumeration_type
:
6980 /* Skip external references. The DWARF standard says in the section
6981 about "Structure, Union, and Class Type Entries": "An incomplete
6982 structure, union or class type is represented by a structure,
6983 union or class entry that does not have a byte size attribute
6984 and that has a DW_AT_declaration attribute." */
6985 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
6987 xfree (built_actual_name
);
6991 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
6992 static vs. global. */
6993 add_psymbol_to_list (actual_name
, strlen (actual_name
),
6994 built_actual_name
!= NULL
,
6995 STRUCT_DOMAIN
, LOC_TYPEDEF
,
6996 (cu
->language
== language_cplus
6997 || cu
->language
== language_java
)
6998 ? &objfile
->global_psymbols
6999 : &objfile
->static_psymbols
,
7000 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7003 case DW_TAG_enumerator
:
7004 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7005 built_actual_name
!= NULL
,
7006 VAR_DOMAIN
, LOC_CONST
,
7007 (cu
->language
== language_cplus
7008 || cu
->language
== language_java
)
7009 ? &objfile
->global_psymbols
7010 : &objfile
->static_psymbols
,
7011 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
7017 xfree (built_actual_name
);
7020 /* Read a partial die corresponding to a namespace; also, add a symbol
7021 corresponding to that namespace to the symbol table. NAMESPACE is
7022 the name of the enclosing namespace. */
7025 add_partial_namespace (struct partial_die_info
*pdi
,
7026 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7027 int set_addrmap
, struct dwarf2_cu
*cu
)
7029 /* Add a symbol for the namespace. */
7031 add_partial_symbol (pdi
, cu
);
7033 /* Now scan partial symbols in that namespace. */
7035 if (pdi
->has_children
)
7036 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7039 /* Read a partial die corresponding to a Fortran module. */
7042 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7043 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7045 /* Add a symbol for the namespace. */
7047 add_partial_symbol (pdi
, cu
);
7049 /* Now scan partial symbols in that module. */
7051 if (pdi
->has_children
)
7052 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7055 /* Read a partial die corresponding to a subprogram and create a partial
7056 symbol for that subprogram. When the CU language allows it, this
7057 routine also defines a partial symbol for each nested subprogram
7058 that this subprogram contains. If SET_ADDRMAP is true, record the
7059 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7060 and highest PC values found in PDI.
7062 PDI may also be a lexical block, in which case we simply search
7063 recursively for subprograms defined inside that lexical block.
7064 Again, this is only performed when the CU language allows this
7065 type of definitions. */
7068 add_partial_subprogram (struct partial_die_info
*pdi
,
7069 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7070 int set_addrmap
, struct dwarf2_cu
*cu
)
7072 if (pdi
->tag
== DW_TAG_subprogram
)
7074 if (pdi
->has_pc_info
)
7076 if (pdi
->lowpc
< *lowpc
)
7077 *lowpc
= pdi
->lowpc
;
7078 if (pdi
->highpc
> *highpc
)
7079 *highpc
= pdi
->highpc
;
7082 struct objfile
*objfile
= cu
->objfile
;
7083 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7088 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7089 SECT_OFF_TEXT (objfile
));
7090 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7091 pdi
->lowpc
+ baseaddr
);
7092 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7093 pdi
->highpc
+ baseaddr
);
7094 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7095 cu
->per_cu
->v
.psymtab
);
7099 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7101 if (!pdi
->is_declaration
)
7102 /* Ignore subprogram DIEs that do not have a name, they are
7103 illegal. Do not emit a complaint at this point, we will
7104 do so when we convert this psymtab into a symtab. */
7106 add_partial_symbol (pdi
, cu
);
7110 if (! pdi
->has_children
)
7113 if (cu
->language
== language_ada
)
7115 pdi
= pdi
->die_child
;
7118 fixup_partial_die (pdi
, cu
);
7119 if (pdi
->tag
== DW_TAG_subprogram
7120 || pdi
->tag
== DW_TAG_lexical_block
)
7121 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7122 pdi
= pdi
->die_sibling
;
7127 /* Read a partial die corresponding to an enumeration type. */
7130 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7131 struct dwarf2_cu
*cu
)
7133 struct partial_die_info
*pdi
;
7135 if (enum_pdi
->name
!= NULL
)
7136 add_partial_symbol (enum_pdi
, cu
);
7138 pdi
= enum_pdi
->die_child
;
7141 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7142 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7144 add_partial_symbol (pdi
, cu
);
7145 pdi
= pdi
->die_sibling
;
7149 /* Return the initial uleb128 in the die at INFO_PTR. */
7152 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7154 unsigned int bytes_read
;
7156 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7159 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7160 Return the corresponding abbrev, or NULL if the number is zero (indicating
7161 an empty DIE). In either case *BYTES_READ will be set to the length of
7162 the initial number. */
7164 static struct abbrev_info
*
7165 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7166 struct dwarf2_cu
*cu
)
7168 bfd
*abfd
= cu
->objfile
->obfd
;
7169 unsigned int abbrev_number
;
7170 struct abbrev_info
*abbrev
;
7172 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7174 if (abbrev_number
== 0)
7177 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7180 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7181 " at offset 0x%x [in module %s]"),
7182 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7183 cu
->header
.offset
.sect_off
, bfd_get_filename (abfd
));
7189 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7190 Returns a pointer to the end of a series of DIEs, terminated by an empty
7191 DIE. Any children of the skipped DIEs will also be skipped. */
7193 static const gdb_byte
*
7194 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7196 struct dwarf2_cu
*cu
= reader
->cu
;
7197 struct abbrev_info
*abbrev
;
7198 unsigned int bytes_read
;
7202 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7204 return info_ptr
+ bytes_read
;
7206 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7210 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7211 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7212 abbrev corresponding to that skipped uleb128 should be passed in
7213 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7216 static const gdb_byte
*
7217 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7218 struct abbrev_info
*abbrev
)
7220 unsigned int bytes_read
;
7221 struct attribute attr
;
7222 bfd
*abfd
= reader
->abfd
;
7223 struct dwarf2_cu
*cu
= reader
->cu
;
7224 const gdb_byte
*buffer
= reader
->buffer
;
7225 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7226 const gdb_byte
*start_info_ptr
= info_ptr
;
7227 unsigned int form
, i
;
7229 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7231 /* The only abbrev we care about is DW_AT_sibling. */
7232 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7234 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7235 if (attr
.form
== DW_FORM_ref_addr
)
7236 complaint (&symfile_complaints
,
7237 _("ignoring absolute DW_AT_sibling"));
7240 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
7241 const gdb_byte
*sibling_ptr
= buffer
+ off
;
7243 if (sibling_ptr
< info_ptr
)
7244 complaint (&symfile_complaints
,
7245 _("DW_AT_sibling points backwards"));
7246 else if (sibling_ptr
> reader
->buffer_end
)
7247 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7253 /* If it isn't DW_AT_sibling, skip this attribute. */
7254 form
= abbrev
->attrs
[i
].form
;
7258 case DW_FORM_ref_addr
:
7259 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7260 and later it is offset sized. */
7261 if (cu
->header
.version
== 2)
7262 info_ptr
+= cu
->header
.addr_size
;
7264 info_ptr
+= cu
->header
.offset_size
;
7266 case DW_FORM_GNU_ref_alt
:
7267 info_ptr
+= cu
->header
.offset_size
;
7270 info_ptr
+= cu
->header
.addr_size
;
7277 case DW_FORM_flag_present
:
7289 case DW_FORM_ref_sig8
:
7292 case DW_FORM_string
:
7293 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7294 info_ptr
+= bytes_read
;
7296 case DW_FORM_sec_offset
:
7298 case DW_FORM_GNU_strp_alt
:
7299 info_ptr
+= cu
->header
.offset_size
;
7301 case DW_FORM_exprloc
:
7303 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7304 info_ptr
+= bytes_read
;
7306 case DW_FORM_block1
:
7307 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7309 case DW_FORM_block2
:
7310 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7312 case DW_FORM_block4
:
7313 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7317 case DW_FORM_ref_udata
:
7318 case DW_FORM_GNU_addr_index
:
7319 case DW_FORM_GNU_str_index
:
7320 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7322 case DW_FORM_indirect
:
7323 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7324 info_ptr
+= bytes_read
;
7325 /* We need to continue parsing from here, so just go back to
7327 goto skip_attribute
;
7330 error (_("Dwarf Error: Cannot handle %s "
7331 "in DWARF reader [in module %s]"),
7332 dwarf_form_name (form
),
7333 bfd_get_filename (abfd
));
7337 if (abbrev
->has_children
)
7338 return skip_children (reader
, info_ptr
);
7343 /* Locate ORIG_PDI's sibling.
7344 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7346 static const gdb_byte
*
7347 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7348 struct partial_die_info
*orig_pdi
,
7349 const gdb_byte
*info_ptr
)
7351 /* Do we know the sibling already? */
7353 if (orig_pdi
->sibling
)
7354 return orig_pdi
->sibling
;
7356 /* Are there any children to deal with? */
7358 if (!orig_pdi
->has_children
)
7361 /* Skip the children the long way. */
7363 return skip_children (reader
, info_ptr
);
7366 /* Expand this partial symbol table into a full symbol table. SELF is
7370 dwarf2_read_symtab (struct partial_symtab
*self
,
7371 struct objfile
*objfile
)
7375 warning (_("bug: psymtab for %s is already read in."),
7382 printf_filtered (_("Reading in symbols for %s..."),
7384 gdb_flush (gdb_stdout
);
7387 /* Restore our global data. */
7388 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
7390 /* If this psymtab is constructed from a debug-only objfile, the
7391 has_section_at_zero flag will not necessarily be correct. We
7392 can get the correct value for this flag by looking at the data
7393 associated with the (presumably stripped) associated objfile. */
7394 if (objfile
->separate_debug_objfile_backlink
)
7396 struct dwarf2_per_objfile
*dpo_backlink
7397 = objfile_data (objfile
->separate_debug_objfile_backlink
,
7398 dwarf2_objfile_data_key
);
7400 dwarf2_per_objfile
->has_section_at_zero
7401 = dpo_backlink
->has_section_at_zero
;
7404 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7406 psymtab_to_symtab_1 (self
);
7408 /* Finish up the debug error message. */
7410 printf_filtered (_("done.\n"));
7413 process_cu_includes ();
7416 /* Reading in full CUs. */
7418 /* Add PER_CU to the queue. */
7421 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7422 enum language pretend_language
)
7424 struct dwarf2_queue_item
*item
;
7427 item
= xmalloc (sizeof (*item
));
7428 item
->per_cu
= per_cu
;
7429 item
->pretend_language
= pretend_language
;
7432 if (dwarf2_queue
== NULL
)
7433 dwarf2_queue
= item
;
7435 dwarf2_queue_tail
->next
= item
;
7437 dwarf2_queue_tail
= item
;
7440 /* If PER_CU is not yet queued, add it to the queue.
7441 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7443 The result is non-zero if PER_CU was queued, otherwise the result is zero
7444 meaning either PER_CU is already queued or it is already loaded.
7446 N.B. There is an invariant here that if a CU is queued then it is loaded.
7447 The caller is required to load PER_CU if we return non-zero. */
7450 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7451 struct dwarf2_per_cu_data
*per_cu
,
7452 enum language pretend_language
)
7454 /* We may arrive here during partial symbol reading, if we need full
7455 DIEs to process an unusual case (e.g. template arguments). Do
7456 not queue PER_CU, just tell our caller to load its DIEs. */
7457 if (dwarf2_per_objfile
->reading_partial_symbols
)
7459 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7464 /* Mark the dependence relation so that we don't flush PER_CU
7466 if (dependent_cu
!= NULL
)
7467 dwarf2_add_dependence (dependent_cu
, per_cu
);
7469 /* If it's already on the queue, we have nothing to do. */
7473 /* If the compilation unit is already loaded, just mark it as
7475 if (per_cu
->cu
!= NULL
)
7477 per_cu
->cu
->last_used
= 0;
7481 /* Add it to the queue. */
7482 queue_comp_unit (per_cu
, pretend_language
);
7487 /* Process the queue. */
7490 process_queue (void)
7492 struct dwarf2_queue_item
*item
, *next_item
;
7494 if (dwarf2_read_debug
)
7496 fprintf_unfiltered (gdb_stdlog
,
7497 "Expanding one or more symtabs of objfile %s ...\n",
7498 objfile_name (dwarf2_per_objfile
->objfile
));
7501 /* The queue starts out with one item, but following a DIE reference
7502 may load a new CU, adding it to the end of the queue. */
7503 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7505 if (dwarf2_per_objfile
->using_index
7506 ? !item
->per_cu
->v
.quick
->compunit_symtab
7507 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7509 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7510 unsigned int debug_print_threshold
;
7513 if (per_cu
->is_debug_types
)
7515 struct signatured_type
*sig_type
=
7516 (struct signatured_type
*) per_cu
;
7518 sprintf (buf
, "TU %s at offset 0x%x",
7519 hex_string (sig_type
->signature
),
7520 per_cu
->offset
.sect_off
);
7521 /* There can be 100s of TUs.
7522 Only print them in verbose mode. */
7523 debug_print_threshold
= 2;
7527 sprintf (buf
, "CU at offset 0x%x", per_cu
->offset
.sect_off
);
7528 debug_print_threshold
= 1;
7531 if (dwarf2_read_debug
>= debug_print_threshold
)
7532 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7534 if (per_cu
->is_debug_types
)
7535 process_full_type_unit (per_cu
, item
->pretend_language
);
7537 process_full_comp_unit (per_cu
, item
->pretend_language
);
7539 if (dwarf2_read_debug
>= debug_print_threshold
)
7540 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7543 item
->per_cu
->queued
= 0;
7544 next_item
= item
->next
;
7548 dwarf2_queue_tail
= NULL
;
7550 if (dwarf2_read_debug
)
7552 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7553 objfile_name (dwarf2_per_objfile
->objfile
));
7557 /* Free all allocated queue entries. This function only releases anything if
7558 an error was thrown; if the queue was processed then it would have been
7559 freed as we went along. */
7562 dwarf2_release_queue (void *dummy
)
7564 struct dwarf2_queue_item
*item
, *last
;
7566 item
= dwarf2_queue
;
7569 /* Anything still marked queued is likely to be in an
7570 inconsistent state, so discard it. */
7571 if (item
->per_cu
->queued
)
7573 if (item
->per_cu
->cu
!= NULL
)
7574 free_one_cached_comp_unit (item
->per_cu
);
7575 item
->per_cu
->queued
= 0;
7583 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7586 /* Read in full symbols for PST, and anything it depends on. */
7589 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7591 struct dwarf2_per_cu_data
*per_cu
;
7597 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7598 if (!pst
->dependencies
[i
]->readin
7599 && pst
->dependencies
[i
]->user
== NULL
)
7601 /* Inform about additional files that need to be read in. */
7604 /* FIXME: i18n: Need to make this a single string. */
7605 fputs_filtered (" ", gdb_stdout
);
7607 fputs_filtered ("and ", gdb_stdout
);
7609 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7610 wrap_here (""); /* Flush output. */
7611 gdb_flush (gdb_stdout
);
7613 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7616 per_cu
= pst
->read_symtab_private
;
7620 /* It's an include file, no symbols to read for it.
7621 Everything is in the parent symtab. */
7626 dw2_do_instantiate_symtab (per_cu
);
7629 /* Trivial hash function for die_info: the hash value of a DIE
7630 is its offset in .debug_info for this objfile. */
7633 die_hash (const void *item
)
7635 const struct die_info
*die
= item
;
7637 return die
->offset
.sect_off
;
7640 /* Trivial comparison function for die_info structures: two DIEs
7641 are equal if they have the same offset. */
7644 die_eq (const void *item_lhs
, const void *item_rhs
)
7646 const struct die_info
*die_lhs
= item_lhs
;
7647 const struct die_info
*die_rhs
= item_rhs
;
7649 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
7652 /* die_reader_func for load_full_comp_unit.
7653 This is identical to read_signatured_type_reader,
7654 but is kept separate for now. */
7657 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7658 const gdb_byte
*info_ptr
,
7659 struct die_info
*comp_unit_die
,
7663 struct dwarf2_cu
*cu
= reader
->cu
;
7664 enum language
*language_ptr
= data
;
7666 gdb_assert (cu
->die_hash
== NULL
);
7668 htab_create_alloc_ex (cu
->header
.length
/ 12,
7672 &cu
->comp_unit_obstack
,
7673 hashtab_obstack_allocate
,
7674 dummy_obstack_deallocate
);
7677 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7678 &info_ptr
, comp_unit_die
);
7679 cu
->dies
= comp_unit_die
;
7680 /* comp_unit_die is not stored in die_hash, no need. */
7682 /* We try not to read any attributes in this function, because not
7683 all CUs needed for references have been loaded yet, and symbol
7684 table processing isn't initialized. But we have to set the CU language,
7685 or we won't be able to build types correctly.
7686 Similarly, if we do not read the producer, we can not apply
7687 producer-specific interpretation. */
7688 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
7691 /* Load the DIEs associated with PER_CU into memory. */
7694 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
7695 enum language pretend_language
)
7697 gdb_assert (! this_cu
->is_debug_types
);
7699 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
7700 load_full_comp_unit_reader
, &pretend_language
);
7703 /* Add a DIE to the delayed physname list. */
7706 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
7707 const char *name
, struct die_info
*die
,
7708 struct dwarf2_cu
*cu
)
7710 struct delayed_method_info mi
;
7712 mi
.fnfield_index
= fnfield_index
;
7716 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
7719 /* A cleanup for freeing the delayed method list. */
7722 free_delayed_list (void *ptr
)
7724 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
7725 if (cu
->method_list
!= NULL
)
7727 VEC_free (delayed_method_info
, cu
->method_list
);
7728 cu
->method_list
= NULL
;
7732 /* Compute the physnames of any methods on the CU's method list.
7734 The computation of method physnames is delayed in order to avoid the
7735 (bad) condition that one of the method's formal parameters is of an as yet
7739 compute_delayed_physnames (struct dwarf2_cu
*cu
)
7742 struct delayed_method_info
*mi
;
7743 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
7745 const char *physname
;
7746 struct fn_fieldlist
*fn_flp
7747 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
7748 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
7749 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
7750 = physname
? physname
: "";
7754 /* Go objects should be embedded in a DW_TAG_module DIE,
7755 and it's not clear if/how imported objects will appear.
7756 To keep Go support simple until that's worked out,
7757 go back through what we've read and create something usable.
7758 We could do this while processing each DIE, and feels kinda cleaner,
7759 but that way is more invasive.
7760 This is to, for example, allow the user to type "p var" or "b main"
7761 without having to specify the package name, and allow lookups
7762 of module.object to work in contexts that use the expression
7766 fixup_go_packaging (struct dwarf2_cu
*cu
)
7768 char *package_name
= NULL
;
7769 struct pending
*list
;
7772 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
7774 for (i
= 0; i
< list
->nsyms
; ++i
)
7776 struct symbol
*sym
= list
->symbol
[i
];
7778 if (SYMBOL_LANGUAGE (sym
) == language_go
7779 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
7781 char *this_package_name
= go_symbol_package_name (sym
);
7783 if (this_package_name
== NULL
)
7785 if (package_name
== NULL
)
7786 package_name
= this_package_name
;
7789 if (strcmp (package_name
, this_package_name
) != 0)
7790 complaint (&symfile_complaints
,
7791 _("Symtab %s has objects from two different Go packages: %s and %s"),
7792 (symbol_symtab (sym
) != NULL
7793 ? symtab_to_filename_for_display
7794 (symbol_symtab (sym
))
7795 : objfile_name (cu
->objfile
)),
7796 this_package_name
, package_name
);
7797 xfree (this_package_name
);
7803 if (package_name
!= NULL
)
7805 struct objfile
*objfile
= cu
->objfile
;
7806 const char *saved_package_name
7807 = obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
7809 strlen (package_name
));
7810 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
7811 saved_package_name
, objfile
);
7814 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7816 sym
= allocate_symbol (objfile
);
7817 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
7818 SYMBOL_SET_NAMES (sym
, saved_package_name
,
7819 strlen (saved_package_name
), 0, objfile
);
7820 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
7821 e.g., "main" finds the "main" module and not C's main(). */
7822 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7823 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
7824 SYMBOL_TYPE (sym
) = type
;
7826 add_symbol_to_list (sym
, &global_symbols
);
7828 xfree (package_name
);
7832 /* Return the symtab for PER_CU. This works properly regardless of
7833 whether we're using the index or psymtabs. */
7835 static struct compunit_symtab
*
7836 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
7838 return (dwarf2_per_objfile
->using_index
7839 ? per_cu
->v
.quick
->compunit_symtab
7840 : per_cu
->v
.psymtab
->compunit_symtab
);
7843 /* A helper function for computing the list of all symbol tables
7844 included by PER_CU. */
7847 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
7848 htab_t all_children
, htab_t all_type_symtabs
,
7849 struct dwarf2_per_cu_data
*per_cu
,
7850 struct compunit_symtab
*immediate_parent
)
7854 struct compunit_symtab
*cust
;
7855 struct dwarf2_per_cu_data
*iter
;
7857 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
7860 /* This inclusion and its children have been processed. */
7865 /* Only add a CU if it has a symbol table. */
7866 cust
= get_compunit_symtab (per_cu
);
7869 /* If this is a type unit only add its symbol table if we haven't
7870 seen it yet (type unit per_cu's can share symtabs). */
7871 if (per_cu
->is_debug_types
)
7873 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
7877 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7878 if (cust
->user
== NULL
)
7879 cust
->user
= immediate_parent
;
7884 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
7885 if (cust
->user
== NULL
)
7886 cust
->user
= immediate_parent
;
7891 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
7894 recursively_compute_inclusions (result
, all_children
,
7895 all_type_symtabs
, iter
, cust
);
7899 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
7903 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
7905 gdb_assert (! per_cu
->is_debug_types
);
7907 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
7910 struct dwarf2_per_cu_data
*per_cu_iter
;
7911 struct compunit_symtab
*compunit_symtab_iter
;
7912 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
7913 htab_t all_children
, all_type_symtabs
;
7914 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
7916 /* If we don't have a symtab, we can just skip this case. */
7920 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7921 NULL
, xcalloc
, xfree
);
7922 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
7923 NULL
, xcalloc
, xfree
);
7926 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
7930 recursively_compute_inclusions (&result_symtabs
, all_children
,
7931 all_type_symtabs
, per_cu_iter
,
7935 /* Now we have a transitive closure of all the included symtabs. */
7936 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
7938 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
7939 (len
+ 1) * sizeof (struct symtab
*));
7941 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
7942 compunit_symtab_iter
);
7944 cust
->includes
[ix
] = compunit_symtab_iter
;
7945 cust
->includes
[len
] = NULL
;
7947 VEC_free (compunit_symtab_ptr
, result_symtabs
);
7948 htab_delete (all_children
);
7949 htab_delete (all_type_symtabs
);
7953 /* Compute the 'includes' field for the symtabs of all the CUs we just
7957 process_cu_includes (void)
7960 struct dwarf2_per_cu_data
*iter
;
7963 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
7967 if (! iter
->is_debug_types
)
7968 compute_compunit_symtab_includes (iter
);
7971 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
7974 /* Generate full symbol information for PER_CU, whose DIEs have
7975 already been loaded into memory. */
7978 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7979 enum language pretend_language
)
7981 struct dwarf2_cu
*cu
= per_cu
->cu
;
7982 struct objfile
*objfile
= per_cu
->objfile
;
7983 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7984 CORE_ADDR lowpc
, highpc
;
7985 struct compunit_symtab
*cust
;
7986 struct cleanup
*back_to
, *delayed_list_cleanup
;
7988 struct block
*static_block
;
7991 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7994 back_to
= make_cleanup (really_free_pendings
, NULL
);
7995 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
7997 cu
->list_in_scope
= &file_symbols
;
7999 cu
->language
= pretend_language
;
8000 cu
->language_defn
= language_def (cu
->language
);
8002 /* Do line number decoding in read_file_scope () */
8003 process_die (cu
->dies
, cu
);
8005 /* For now fudge the Go package. */
8006 if (cu
->language
== language_go
)
8007 fixup_go_packaging (cu
);
8009 /* Now that we have processed all the DIEs in the CU, all the types
8010 should be complete, and it should now be safe to compute all of the
8012 compute_delayed_physnames (cu
);
8013 do_cleanups (delayed_list_cleanup
);
8015 /* Some compilers don't define a DW_AT_high_pc attribute for the
8016 compilation unit. If the DW_AT_high_pc is missing, synthesize
8017 it, by scanning the DIE's below the compilation unit. */
8018 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8020 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8021 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8023 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8024 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8025 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8026 addrmap to help ensure it has an accurate map of pc values belonging to
8028 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8030 cust
= end_symtab_from_static_block (static_block
,
8031 SECT_OFF_TEXT (objfile
), 0);
8035 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8037 /* Set symtab language to language from DW_AT_language. If the
8038 compilation is from a C file generated by language preprocessors, do
8039 not set the language if it was already deduced by start_subfile. */
8040 if (!(cu
->language
== language_c
8041 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8042 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8044 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8045 produce DW_AT_location with location lists but it can be possibly
8046 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8047 there were bugs in prologue debug info, fixed later in GCC-4.5
8048 by "unwind info for epilogues" patch (which is not directly related).
8050 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8051 needed, it would be wrong due to missing DW_AT_producer there.
8053 Still one can confuse GDB by using non-standard GCC compilation
8054 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8056 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8057 cust
->locations_valid
= 1;
8059 if (gcc_4_minor
>= 5)
8060 cust
->epilogue_unwind_valid
= 1;
8062 cust
->call_site_htab
= cu
->call_site_htab
;
8065 if (dwarf2_per_objfile
->using_index
)
8066 per_cu
->v
.quick
->compunit_symtab
= cust
;
8069 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8070 pst
->compunit_symtab
= cust
;
8074 /* Push it for inclusion processing later. */
8075 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8077 do_cleanups (back_to
);
8080 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8081 already been loaded into memory. */
8084 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8085 enum language pretend_language
)
8087 struct dwarf2_cu
*cu
= per_cu
->cu
;
8088 struct objfile
*objfile
= per_cu
->objfile
;
8089 struct compunit_symtab
*cust
;
8090 struct cleanup
*back_to
, *delayed_list_cleanup
;
8091 struct signatured_type
*sig_type
;
8093 gdb_assert (per_cu
->is_debug_types
);
8094 sig_type
= (struct signatured_type
*) per_cu
;
8097 back_to
= make_cleanup (really_free_pendings
, NULL
);
8098 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8100 cu
->list_in_scope
= &file_symbols
;
8102 cu
->language
= pretend_language
;
8103 cu
->language_defn
= language_def (cu
->language
);
8105 /* The symbol tables are set up in read_type_unit_scope. */
8106 process_die (cu
->dies
, cu
);
8108 /* For now fudge the Go package. */
8109 if (cu
->language
== language_go
)
8110 fixup_go_packaging (cu
);
8112 /* Now that we have processed all the DIEs in the CU, all the types
8113 should be complete, and it should now be safe to compute all of the
8115 compute_delayed_physnames (cu
);
8116 do_cleanups (delayed_list_cleanup
);
8118 /* TUs share symbol tables.
8119 If this is the first TU to use this symtab, complete the construction
8120 of it with end_expandable_symtab. Otherwise, complete the addition of
8121 this TU's symbols to the existing symtab. */
8122 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8124 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8125 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8129 /* Set symtab language to language from DW_AT_language. If the
8130 compilation is from a C file generated by language preprocessors,
8131 do not set the language if it was already deduced by
8133 if (!(cu
->language
== language_c
8134 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8135 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8140 augment_type_symtab ();
8141 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8144 if (dwarf2_per_objfile
->using_index
)
8145 per_cu
->v
.quick
->compunit_symtab
= cust
;
8148 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8149 pst
->compunit_symtab
= cust
;
8153 do_cleanups (back_to
);
8156 /* Process an imported unit DIE. */
8159 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8161 struct attribute
*attr
;
8163 /* For now we don't handle imported units in type units. */
8164 if (cu
->per_cu
->is_debug_types
)
8166 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8167 " supported in type units [in module %s]"),
8168 objfile_name (cu
->objfile
));
8171 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8174 struct dwarf2_per_cu_data
*per_cu
;
8175 struct symtab
*imported_symtab
;
8179 offset
= dwarf2_get_ref_die_offset (attr
);
8180 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8181 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
8183 /* If necessary, add it to the queue and load its DIEs. */
8184 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8185 load_full_comp_unit (per_cu
, cu
->language
);
8187 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8192 /* Reset the in_process bit of a die. */
8195 reset_die_in_process (void *arg
)
8197 struct die_info
*die
= arg
;
8199 die
->in_process
= 0;
8202 /* Process a die and its children. */
8205 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8207 struct cleanup
*in_process
;
8209 /* We should only be processing those not already in process. */
8210 gdb_assert (!die
->in_process
);
8212 die
->in_process
= 1;
8213 in_process
= make_cleanup (reset_die_in_process
,die
);
8217 case DW_TAG_padding
:
8219 case DW_TAG_compile_unit
:
8220 case DW_TAG_partial_unit
:
8221 read_file_scope (die
, cu
);
8223 case DW_TAG_type_unit
:
8224 read_type_unit_scope (die
, cu
);
8226 case DW_TAG_subprogram
:
8227 case DW_TAG_inlined_subroutine
:
8228 read_func_scope (die
, cu
);
8230 case DW_TAG_lexical_block
:
8231 case DW_TAG_try_block
:
8232 case DW_TAG_catch_block
:
8233 read_lexical_block_scope (die
, cu
);
8235 case DW_TAG_GNU_call_site
:
8236 read_call_site_scope (die
, cu
);
8238 case DW_TAG_class_type
:
8239 case DW_TAG_interface_type
:
8240 case DW_TAG_structure_type
:
8241 case DW_TAG_union_type
:
8242 process_structure_scope (die
, cu
);
8244 case DW_TAG_enumeration_type
:
8245 process_enumeration_scope (die
, cu
);
8248 /* These dies have a type, but processing them does not create
8249 a symbol or recurse to process the children. Therefore we can
8250 read them on-demand through read_type_die. */
8251 case DW_TAG_subroutine_type
:
8252 case DW_TAG_set_type
:
8253 case DW_TAG_array_type
:
8254 case DW_TAG_pointer_type
:
8255 case DW_TAG_ptr_to_member_type
:
8256 case DW_TAG_reference_type
:
8257 case DW_TAG_string_type
:
8260 case DW_TAG_base_type
:
8261 case DW_TAG_subrange_type
:
8262 case DW_TAG_typedef
:
8263 /* Add a typedef symbol for the type definition, if it has a
8265 new_symbol (die
, read_type_die (die
, cu
), cu
);
8267 case DW_TAG_common_block
:
8268 read_common_block (die
, cu
);
8270 case DW_TAG_common_inclusion
:
8272 case DW_TAG_namespace
:
8273 cu
->processing_has_namespace_info
= 1;
8274 read_namespace (die
, cu
);
8277 cu
->processing_has_namespace_info
= 1;
8278 read_module (die
, cu
);
8280 case DW_TAG_imported_declaration
:
8281 cu
->processing_has_namespace_info
= 1;
8282 if (read_namespace_alias (die
, cu
))
8284 /* The declaration is not a global namespace alias: fall through. */
8285 case DW_TAG_imported_module
:
8286 cu
->processing_has_namespace_info
= 1;
8287 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8288 || cu
->language
!= language_fortran
))
8289 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8290 dwarf_tag_name (die
->tag
));
8291 read_import_statement (die
, cu
);
8294 case DW_TAG_imported_unit
:
8295 process_imported_unit_die (die
, cu
);
8299 new_symbol (die
, NULL
, cu
);
8303 do_cleanups (in_process
);
8306 /* DWARF name computation. */
8308 /* A helper function for dwarf2_compute_name which determines whether DIE
8309 needs to have the name of the scope prepended to the name listed in the
8313 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8315 struct attribute
*attr
;
8319 case DW_TAG_namespace
:
8320 case DW_TAG_typedef
:
8321 case DW_TAG_class_type
:
8322 case DW_TAG_interface_type
:
8323 case DW_TAG_structure_type
:
8324 case DW_TAG_union_type
:
8325 case DW_TAG_enumeration_type
:
8326 case DW_TAG_enumerator
:
8327 case DW_TAG_subprogram
:
8329 case DW_TAG_imported_declaration
:
8332 case DW_TAG_variable
:
8333 case DW_TAG_constant
:
8334 /* We only need to prefix "globally" visible variables. These include
8335 any variable marked with DW_AT_external or any variable that
8336 lives in a namespace. [Variables in anonymous namespaces
8337 require prefixing, but they are not DW_AT_external.] */
8339 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8341 struct dwarf2_cu
*spec_cu
= cu
;
8343 return die_needs_namespace (die_specification (die
, &spec_cu
),
8347 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8348 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8349 && die
->parent
->tag
!= DW_TAG_module
)
8351 /* A variable in a lexical block of some kind does not need a
8352 namespace, even though in C++ such variables may be external
8353 and have a mangled name. */
8354 if (die
->parent
->tag
== DW_TAG_lexical_block
8355 || die
->parent
->tag
== DW_TAG_try_block
8356 || die
->parent
->tag
== DW_TAG_catch_block
8357 || die
->parent
->tag
== DW_TAG_subprogram
)
8366 /* Retrieve the last character from a mem_file. */
8369 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
8371 char *last_char_p
= (char *) object
;
8374 *last_char_p
= buffer
[length
- 1];
8377 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8378 compute the physname for the object, which include a method's:
8379 - formal parameters (C++/Java),
8380 - receiver type (Go),
8381 - return type (Java).
8383 The term "physname" is a bit confusing.
8384 For C++, for example, it is the demangled name.
8385 For Go, for example, it's the mangled name.
8387 For Ada, return the DIE's linkage name rather than the fully qualified
8388 name. PHYSNAME is ignored..
8390 The result is allocated on the objfile_obstack and canonicalized. */
8393 dwarf2_compute_name (const char *name
,
8394 struct die_info
*die
, struct dwarf2_cu
*cu
,
8397 struct objfile
*objfile
= cu
->objfile
;
8400 name
= dwarf2_name (die
, cu
);
8402 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
8403 compute it by typename_concat inside GDB. */
8404 if (cu
->language
== language_ada
8405 || (cu
->language
== language_fortran
&& physname
))
8407 /* For Ada unit, we prefer the linkage name over the name, as
8408 the former contains the exported name, which the user expects
8409 to be able to reference. Ideally, we want the user to be able
8410 to reference this entity using either natural or linkage name,
8411 but we haven't started looking at this enhancement yet. */
8412 struct attribute
*attr
;
8414 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8416 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8417 if (attr
&& DW_STRING (attr
))
8418 return DW_STRING (attr
);
8421 /* These are the only languages we know how to qualify names in. */
8423 && (cu
->language
== language_cplus
|| cu
->language
== language_java
8424 || cu
->language
== language_fortran
))
8426 if (die_needs_namespace (die
, cu
))
8430 struct ui_file
*buf
;
8431 char *intermediate_name
;
8432 const char *canonical_name
= NULL
;
8434 prefix
= determine_prefix (die
, cu
);
8435 buf
= mem_fileopen ();
8436 if (*prefix
!= '\0')
8438 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8441 fputs_unfiltered (prefixed_name
, buf
);
8442 xfree (prefixed_name
);
8445 fputs_unfiltered (name
, buf
);
8447 /* Template parameters may be specified in the DIE's DW_AT_name, or
8448 as children with DW_TAG_template_type_param or
8449 DW_TAG_value_type_param. If the latter, add them to the name
8450 here. If the name already has template parameters, then
8451 skip this step; some versions of GCC emit both, and
8452 it is more efficient to use the pre-computed name.
8454 Something to keep in mind about this process: it is very
8455 unlikely, or in some cases downright impossible, to produce
8456 something that will match the mangled name of a function.
8457 If the definition of the function has the same debug info,
8458 we should be able to match up with it anyway. But fallbacks
8459 using the minimal symbol, for instance to find a method
8460 implemented in a stripped copy of libstdc++, will not work.
8461 If we do not have debug info for the definition, we will have to
8462 match them up some other way.
8464 When we do name matching there is a related problem with function
8465 templates; two instantiated function templates are allowed to
8466 differ only by their return types, which we do not add here. */
8468 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8470 struct attribute
*attr
;
8471 struct die_info
*child
;
8474 die
->building_fullname
= 1;
8476 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8480 const gdb_byte
*bytes
;
8481 struct dwarf2_locexpr_baton
*baton
;
8484 if (child
->tag
!= DW_TAG_template_type_param
8485 && child
->tag
!= DW_TAG_template_value_param
)
8490 fputs_unfiltered ("<", buf
);
8494 fputs_unfiltered (", ", buf
);
8496 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8499 complaint (&symfile_complaints
,
8500 _("template parameter missing DW_AT_type"));
8501 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
8504 type
= die_type (child
, cu
);
8506 if (child
->tag
== DW_TAG_template_type_param
)
8508 c_print_type (type
, "", buf
, -1, 0, &type_print_raw_options
);
8512 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8515 complaint (&symfile_complaints
,
8516 _("template parameter missing "
8517 "DW_AT_const_value"));
8518 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
8522 dwarf2_const_value_attr (attr
, type
, name
,
8523 &cu
->comp_unit_obstack
, cu
,
8524 &value
, &bytes
, &baton
);
8526 if (TYPE_NOSIGN (type
))
8527 /* GDB prints characters as NUMBER 'CHAR'. If that's
8528 changed, this can use value_print instead. */
8529 c_printchar (value
, type
, buf
);
8532 struct value_print_options opts
;
8535 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8539 else if (bytes
!= NULL
)
8541 v
= allocate_value (type
);
8542 memcpy (value_contents_writeable (v
), bytes
,
8543 TYPE_LENGTH (type
));
8546 v
= value_from_longest (type
, value
);
8548 /* Specify decimal so that we do not depend on
8550 get_formatted_print_options (&opts
, 'd');
8552 value_print (v
, buf
, &opts
);
8558 die
->building_fullname
= 0;
8562 /* Close the argument list, with a space if necessary
8563 (nested templates). */
8564 char last_char
= '\0';
8565 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
8566 if (last_char
== '>')
8567 fputs_unfiltered (" >", buf
);
8569 fputs_unfiltered (">", buf
);
8573 /* For Java and C++ methods, append formal parameter type
8574 information, if PHYSNAME. */
8576 if (physname
&& die
->tag
== DW_TAG_subprogram
8577 && (cu
->language
== language_cplus
8578 || cu
->language
== language_java
))
8580 struct type
*type
= read_type_die (die
, cu
);
8582 c_type_print_args (type
, buf
, 1, cu
->language
,
8583 &type_print_raw_options
);
8585 if (cu
->language
== language_java
)
8587 /* For java, we must append the return type to method
8589 if (die
->tag
== DW_TAG_subprogram
)
8590 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
8591 0, 0, &type_print_raw_options
);
8593 else if (cu
->language
== language_cplus
)
8595 /* Assume that an artificial first parameter is
8596 "this", but do not crash if it is not. RealView
8597 marks unnamed (and thus unused) parameters as
8598 artificial; there is no way to differentiate
8600 if (TYPE_NFIELDS (type
) > 0
8601 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8602 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8603 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8605 fputs_unfiltered (" const", buf
);
8609 intermediate_name
= ui_file_xstrdup (buf
, &length
);
8610 ui_file_delete (buf
);
8612 if (cu
->language
== language_cplus
)
8614 = dwarf2_canonicalize_name (intermediate_name
, cu
,
8615 &objfile
->per_bfd
->storage_obstack
);
8617 /* If we only computed INTERMEDIATE_NAME, or if
8618 INTERMEDIATE_NAME is already canonical, then we need to
8619 copy it to the appropriate obstack. */
8620 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
)
8621 name
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8623 strlen (intermediate_name
));
8625 name
= canonical_name
;
8627 xfree (intermediate_name
);
8634 /* Return the fully qualified name of DIE, based on its DW_AT_name.
8635 If scope qualifiers are appropriate they will be added. The result
8636 will be allocated on the storage_obstack, or NULL if the DIE does
8637 not have a name. NAME may either be from a previous call to
8638 dwarf2_name or NULL.
8640 The output string will be canonicalized (if C++/Java). */
8643 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8645 return dwarf2_compute_name (name
, die
, cu
, 0);
8648 /* Construct a physname for the given DIE in CU. NAME may either be
8649 from a previous call to dwarf2_name or NULL. The result will be
8650 allocated on the objfile_objstack or NULL if the DIE does not have a
8653 The output string will be canonicalized (if C++/Java). */
8656 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
8658 struct objfile
*objfile
= cu
->objfile
;
8659 struct attribute
*attr
;
8660 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
8661 struct cleanup
*back_to
;
8664 /* In this case dwarf2_compute_name is just a shortcut not building anything
8666 if (!die_needs_namespace (die
, cu
))
8667 return dwarf2_compute_name (name
, die
, cu
, 1);
8669 back_to
= make_cleanup (null_cleanup
, NULL
);
8671 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8673 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8675 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
8677 if (attr
&& DW_STRING (attr
))
8681 mangled
= DW_STRING (attr
);
8683 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
8684 type. It is easier for GDB users to search for such functions as
8685 `name(params)' than `long name(params)'. In such case the minimal
8686 symbol names do not match the full symbol names but for template
8687 functions there is never a need to look up their definition from their
8688 declaration so the only disadvantage remains the minimal symbol
8689 variant `long name(params)' does not have the proper inferior type.
8692 if (cu
->language
== language_go
)
8694 /* This is a lie, but we already lie to the caller new_symbol_full.
8695 new_symbol_full assumes we return the mangled name.
8696 This just undoes that lie until things are cleaned up. */
8701 demangled
= gdb_demangle (mangled
,
8702 (DMGL_PARAMS
| DMGL_ANSI
8703 | (cu
->language
== language_java
8704 ? DMGL_JAVA
| DMGL_RET_POSTFIX
8709 make_cleanup (xfree
, demangled
);
8719 if (canon
== NULL
|| check_physname
)
8721 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
8723 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
8725 /* It may not mean a bug in GDB. The compiler could also
8726 compute DW_AT_linkage_name incorrectly. But in such case
8727 GDB would need to be bug-to-bug compatible. */
8729 complaint (&symfile_complaints
,
8730 _("Computed physname <%s> does not match demangled <%s> "
8731 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
8732 physname
, canon
, mangled
, die
->offset
.sect_off
,
8733 objfile_name (objfile
));
8735 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
8736 is available here - over computed PHYSNAME. It is safer
8737 against both buggy GDB and buggy compilers. */
8751 retval
= obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8752 retval
, strlen (retval
));
8754 do_cleanups (back_to
);
8758 /* Inspect DIE in CU for a namespace alias. If one exists, record
8759 a new symbol for it.
8761 Returns 1 if a namespace alias was recorded, 0 otherwise. */
8764 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
8766 struct attribute
*attr
;
8768 /* If the die does not have a name, this is not a namespace
8770 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8774 struct die_info
*d
= die
;
8775 struct dwarf2_cu
*imported_cu
= cu
;
8777 /* If the compiler has nested DW_AT_imported_declaration DIEs,
8778 keep inspecting DIEs until we hit the underlying import. */
8779 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
8780 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
8782 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
8786 d
= follow_die_ref (d
, attr
, &imported_cu
);
8787 if (d
->tag
!= DW_TAG_imported_declaration
)
8791 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
8793 complaint (&symfile_complaints
,
8794 _("DIE at 0x%x has too many recursively imported "
8795 "declarations"), d
->offset
.sect_off
);
8802 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
8804 type
= get_die_type_at_offset (offset
, cu
->per_cu
);
8805 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
8807 /* This declaration is a global namespace alias. Add
8808 a symbol for it whose type is the aliased namespace. */
8809 new_symbol (die
, type
, cu
);
8818 /* Read the import statement specified by the given die and record it. */
8821 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
8823 struct objfile
*objfile
= cu
->objfile
;
8824 struct attribute
*import_attr
;
8825 struct die_info
*imported_die
, *child_die
;
8826 struct dwarf2_cu
*imported_cu
;
8827 const char *imported_name
;
8828 const char *imported_name_prefix
;
8829 const char *canonical_name
;
8830 const char *import_alias
;
8831 const char *imported_declaration
= NULL
;
8832 const char *import_prefix
;
8833 VEC (const_char_ptr
) *excludes
= NULL
;
8834 struct cleanup
*cleanups
;
8836 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8837 if (import_attr
== NULL
)
8839 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8840 dwarf_tag_name (die
->tag
));
8845 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
8846 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8847 if (imported_name
== NULL
)
8849 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
8851 The import in the following code:
8865 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
8866 <52> DW_AT_decl_file : 1
8867 <53> DW_AT_decl_line : 6
8868 <54> DW_AT_import : <0x75>
8869 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
8871 <5b> DW_AT_decl_file : 1
8872 <5c> DW_AT_decl_line : 2
8873 <5d> DW_AT_type : <0x6e>
8875 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
8876 <76> DW_AT_byte_size : 4
8877 <77> DW_AT_encoding : 5 (signed)
8879 imports the wrong die ( 0x75 instead of 0x58 ).
8880 This case will be ignored until the gcc bug is fixed. */
8884 /* Figure out the local name after import. */
8885 import_alias
= dwarf2_name (die
, cu
);
8887 /* Figure out where the statement is being imported to. */
8888 import_prefix
= determine_prefix (die
, cu
);
8890 /* Figure out what the scope of the imported die is and prepend it
8891 to the name of the imported die. */
8892 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
8894 if (imported_die
->tag
!= DW_TAG_namespace
8895 && imported_die
->tag
!= DW_TAG_module
)
8897 imported_declaration
= imported_name
;
8898 canonical_name
= imported_name_prefix
;
8900 else if (strlen (imported_name_prefix
) > 0)
8901 canonical_name
= obconcat (&objfile
->objfile_obstack
,
8902 imported_name_prefix
, "::", imported_name
,
8905 canonical_name
= imported_name
;
8907 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
8909 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
8910 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8911 child_die
= sibling_die (child_die
))
8913 /* DWARF-4: A Fortran use statement with a “rename list” may be
8914 represented by an imported module entry with an import attribute
8915 referring to the module and owned entries corresponding to those
8916 entities that are renamed as part of being imported. */
8918 if (child_die
->tag
!= DW_TAG_imported_declaration
)
8920 complaint (&symfile_complaints
,
8921 _("child DW_TAG_imported_declaration expected "
8922 "- DIE at 0x%x [in module %s]"),
8923 child_die
->offset
.sect_off
, objfile_name (objfile
));
8927 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
8928 if (import_attr
== NULL
)
8930 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
8931 dwarf_tag_name (child_die
->tag
));
8936 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
8938 imported_name
= dwarf2_name (imported_die
, imported_cu
);
8939 if (imported_name
== NULL
)
8941 complaint (&symfile_complaints
,
8942 _("child DW_TAG_imported_declaration has unknown "
8943 "imported name - DIE at 0x%x [in module %s]"),
8944 child_die
->offset
.sect_off
, objfile_name (objfile
));
8948 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
8950 process_die (child_die
, cu
);
8953 cp_add_using_directive (import_prefix
,
8956 imported_declaration
,
8959 &objfile
->objfile_obstack
);
8961 do_cleanups (cleanups
);
8964 /* Cleanup function for handle_DW_AT_stmt_list. */
8967 free_cu_line_header (void *arg
)
8969 struct dwarf2_cu
*cu
= arg
;
8971 free_line_header (cu
->line_header
);
8972 cu
->line_header
= NULL
;
8975 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
8976 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
8977 this, it was first present in GCC release 4.3.0. */
8980 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
8982 if (!cu
->checked_producer
)
8983 check_producer (cu
);
8985 return cu
->producer_is_gcc_lt_4_3
;
8989 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
8990 const char **name
, const char **comp_dir
)
8992 struct attribute
*attr
;
8997 /* Find the filename. Do not use dwarf2_name here, since the filename
8998 is not a source language identifier. */
8999 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9002 *name
= DW_STRING (attr
);
9005 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
9007 *comp_dir
= DW_STRING (attr
);
9008 else if (producer_is_gcc_lt_4_3 (cu
) && *name
!= NULL
9009 && IS_ABSOLUTE_PATH (*name
))
9011 char *d
= ldirname (*name
);
9015 make_cleanup (xfree
, d
);
9017 if (*comp_dir
!= NULL
)
9019 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9020 directory, get rid of it. */
9021 char *cp
= strchr (*comp_dir
, ':');
9023 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9028 *name
= "<unknown>";
9031 /* Handle DW_AT_stmt_list for a compilation unit.
9032 DIE is the DW_TAG_compile_unit die for CU.
9033 COMP_DIR is the compilation directory. LOWPC is passed to
9034 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9037 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9038 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9040 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9041 struct attribute
*attr
;
9042 unsigned int line_offset
;
9043 struct line_header line_header_local
;
9044 hashval_t line_header_local_hash
;
9049 gdb_assert (! cu
->per_cu
->is_debug_types
);
9051 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9055 line_offset
= DW_UNSND (attr
);
9057 /* The line header hash table is only created if needed (it exists to
9058 prevent redundant reading of the line table for partial_units).
9059 If we're given a partial_unit, we'll need it. If we're given a
9060 compile_unit, then use the line header hash table if it's already
9061 created, but don't create one just yet. */
9063 if (dwarf2_per_objfile
->line_header_hash
== NULL
9064 && die
->tag
== DW_TAG_partial_unit
)
9066 dwarf2_per_objfile
->line_header_hash
9067 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9068 line_header_eq_voidp
,
9069 free_line_header_voidp
,
9070 &objfile
->objfile_obstack
,
9071 hashtab_obstack_allocate
,
9072 dummy_obstack_deallocate
);
9075 line_header_local
.offset
.sect_off
= line_offset
;
9076 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9077 line_header_local_hash
= line_header_hash (&line_header_local
);
9078 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9080 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9082 line_header_local_hash
, NO_INSERT
);
9084 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9085 is not present in *SLOT (since if there is something in *SLOT then
9086 it will be for a partial_unit). */
9087 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9089 gdb_assert (*slot
!= NULL
);
9090 cu
->line_header
= *slot
;
9095 /* dwarf_decode_line_header does not yet provide sufficient information.
9096 We always have to call also dwarf_decode_lines for it. */
9097 cu
->line_header
= dwarf_decode_line_header (line_offset
, cu
);
9098 if (cu
->line_header
== NULL
)
9101 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9105 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9107 line_header_local_hash
, INSERT
);
9108 gdb_assert (slot
!= NULL
);
9110 if (slot
!= NULL
&& *slot
== NULL
)
9112 /* This newly decoded line number information unit will be owned
9113 by line_header_hash hash table. */
9114 *slot
= cu
->line_header
;
9118 /* We cannot free any current entry in (*slot) as that struct line_header
9119 may be already used by multiple CUs. Create only temporary decoded
9120 line_header for this CU - it may happen at most once for each line
9121 number information unit. And if we're not using line_header_hash
9122 then this is what we want as well. */
9123 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9124 make_cleanup (free_cu_line_header
, cu
);
9126 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9127 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9131 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9134 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9136 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9137 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9138 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
9139 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9140 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9141 struct attribute
*attr
;
9142 const char *name
= NULL
;
9143 const char *comp_dir
= NULL
;
9144 struct die_info
*child_die
;
9145 bfd
*abfd
= objfile
->obfd
;
9148 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9150 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9152 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9153 from finish_block. */
9154 if (lowpc
== ((CORE_ADDR
) -1))
9156 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9158 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
9160 prepare_one_comp_unit (cu
, die
, cu
->language
);
9162 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9163 standardised yet. As a workaround for the language detection we fall
9164 back to the DW_AT_producer string. */
9165 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9166 cu
->language
= language_opencl
;
9168 /* Similar hack for Go. */
9169 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9170 set_cu_language (DW_LANG_Go
, cu
);
9172 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
9174 /* Decode line number information if present. We do this before
9175 processing child DIEs, so that the line header table is available
9176 for DW_AT_decl_file. */
9177 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, lowpc
);
9179 /* Process all dies in compilation unit. */
9180 if (die
->child
!= NULL
)
9182 child_die
= die
->child
;
9183 while (child_die
&& child_die
->tag
)
9185 process_die (child_die
, cu
);
9186 child_die
= sibling_die (child_die
);
9190 /* Decode macro information, if present. Dwarf 2 macro information
9191 refers to information in the line number info statement program
9192 header, so we can only read it if we've read the header
9194 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9195 if (attr
&& cu
->line_header
)
9197 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9198 complaint (&symfile_complaints
,
9199 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
9201 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9205 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9206 if (attr
&& cu
->line_header
)
9208 unsigned int macro_offset
= DW_UNSND (attr
);
9210 dwarf_decode_macros (cu
, macro_offset
, 0);
9214 do_cleanups (back_to
);
9217 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9218 Create the set of symtabs used by this TU, or if this TU is sharing
9219 symtabs with another TU and the symtabs have already been created
9220 then restore those symtabs in the line header.
9221 We don't need the pc/line-number mapping for type units. */
9224 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9226 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9227 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9228 struct type_unit_group
*tu_group
;
9230 struct line_header
*lh
;
9231 struct attribute
*attr
;
9232 unsigned int i
, line_offset
;
9233 struct signatured_type
*sig_type
;
9235 gdb_assert (per_cu
->is_debug_types
);
9236 sig_type
= (struct signatured_type
*) per_cu
;
9238 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9240 /* If we're using .gdb_index (includes -readnow) then
9241 per_cu->type_unit_group may not have been set up yet. */
9242 if (sig_type
->type_unit_group
== NULL
)
9243 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9244 tu_group
= sig_type
->type_unit_group
;
9246 /* If we've already processed this stmt_list there's no real need to
9247 do it again, we could fake it and just recreate the part we need
9248 (file name,index -> symtab mapping). If data shows this optimization
9249 is useful we can do it then. */
9250 first_time
= tu_group
->compunit_symtab
== NULL
;
9252 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9257 line_offset
= DW_UNSND (attr
);
9258 lh
= dwarf_decode_line_header (line_offset
, cu
);
9263 dwarf2_start_symtab (cu
, "", NULL
, 0);
9266 gdb_assert (tu_group
->symtabs
== NULL
);
9267 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9272 cu
->line_header
= lh
;
9273 make_cleanup (free_cu_line_header
, cu
);
9277 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9279 tu_group
->num_symtabs
= lh
->num_file_names
;
9280 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
9282 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9284 const char *dir
= NULL
;
9285 struct file_entry
*fe
= &lh
->file_names
[i
];
9288 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9289 dwarf2_start_subfile (fe
->name
, dir
);
9291 if (current_subfile
->symtab
== NULL
)
9293 /* NOTE: start_subfile will recognize when it's been passed
9294 a file it has already seen. So we can't assume there's a
9295 simple mapping from lh->file_names to subfiles, plus
9296 lh->file_names may contain dups. */
9297 current_subfile
->symtab
9298 = allocate_symtab (cust
, current_subfile
->name
);
9301 fe
->symtab
= current_subfile
->symtab
;
9302 tu_group
->symtabs
[i
] = fe
->symtab
;
9307 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9309 for (i
= 0; i
< lh
->num_file_names
; ++i
)
9311 struct file_entry
*fe
= &lh
->file_names
[i
];
9313 fe
->symtab
= tu_group
->symtabs
[i
];
9317 /* The main symtab is allocated last. Type units don't have DW_AT_name
9318 so they don't have a "real" (so to speak) symtab anyway.
9319 There is later code that will assign the main symtab to all symbols
9320 that don't have one. We need to handle the case of a symbol with a
9321 missing symtab (DW_AT_decl_file) anyway. */
9324 /* Process DW_TAG_type_unit.
9325 For TUs we want to skip the first top level sibling if it's not the
9326 actual type being defined by this TU. In this case the first top
9327 level sibling is there to provide context only. */
9330 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9332 struct die_info
*child_die
;
9334 prepare_one_comp_unit (cu
, die
, language_minimal
);
9336 /* Initialize (or reinitialize) the machinery for building symtabs.
9337 We do this before processing child DIEs, so that the line header table
9338 is available for DW_AT_decl_file. */
9339 setup_type_unit_groups (die
, cu
);
9341 if (die
->child
!= NULL
)
9343 child_die
= die
->child
;
9344 while (child_die
&& child_die
->tag
)
9346 process_die (child_die
, cu
);
9347 child_die
= sibling_die (child_die
);
9354 http://gcc.gnu.org/wiki/DebugFission
9355 http://gcc.gnu.org/wiki/DebugFissionDWP
9357 To simplify handling of both DWO files ("object" files with the DWARF info)
9358 and DWP files (a file with the DWOs packaged up into one file), we treat
9359 DWP files as having a collection of virtual DWO files. */
9362 hash_dwo_file (const void *item
)
9364 const struct dwo_file
*dwo_file
= item
;
9367 hash
= htab_hash_string (dwo_file
->dwo_name
);
9368 if (dwo_file
->comp_dir
!= NULL
)
9369 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9374 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9376 const struct dwo_file
*lhs
= item_lhs
;
9377 const struct dwo_file
*rhs
= item_rhs
;
9379 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9381 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9382 return lhs
->comp_dir
== rhs
->comp_dir
;
9383 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9386 /* Allocate a hash table for DWO files. */
9389 allocate_dwo_file_hash_table (void)
9391 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9393 return htab_create_alloc_ex (41,
9397 &objfile
->objfile_obstack
,
9398 hashtab_obstack_allocate
,
9399 dummy_obstack_deallocate
);
9402 /* Lookup DWO file DWO_NAME. */
9405 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9407 struct dwo_file find_entry
;
9410 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9411 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9413 memset (&find_entry
, 0, sizeof (find_entry
));
9414 find_entry
.dwo_name
= dwo_name
;
9415 find_entry
.comp_dir
= comp_dir
;
9416 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9422 hash_dwo_unit (const void *item
)
9424 const struct dwo_unit
*dwo_unit
= item
;
9426 /* This drops the top 32 bits of the id, but is ok for a hash. */
9427 return dwo_unit
->signature
;
9431 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9433 const struct dwo_unit
*lhs
= item_lhs
;
9434 const struct dwo_unit
*rhs
= item_rhs
;
9436 /* The signature is assumed to be unique within the DWO file.
9437 So while object file CU dwo_id's always have the value zero,
9438 that's OK, assuming each object file DWO file has only one CU,
9439 and that's the rule for now. */
9440 return lhs
->signature
== rhs
->signature
;
9443 /* Allocate a hash table for DWO CUs,TUs.
9444 There is one of these tables for each of CUs,TUs for each DWO file. */
9447 allocate_dwo_unit_table (struct objfile
*objfile
)
9449 /* Start out with a pretty small number.
9450 Generally DWO files contain only one CU and maybe some TUs. */
9451 return htab_create_alloc_ex (3,
9455 &objfile
->objfile_obstack
,
9456 hashtab_obstack_allocate
,
9457 dummy_obstack_deallocate
);
9460 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9462 struct create_dwo_cu_data
9464 struct dwo_file
*dwo_file
;
9465 struct dwo_unit dwo_unit
;
9468 /* die_reader_func for create_dwo_cu. */
9471 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9472 const gdb_byte
*info_ptr
,
9473 struct die_info
*comp_unit_die
,
9477 struct dwarf2_cu
*cu
= reader
->cu
;
9478 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9479 sect_offset offset
= cu
->per_cu
->offset
;
9480 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9481 struct create_dwo_cu_data
*data
= datap
;
9482 struct dwo_file
*dwo_file
= data
->dwo_file
;
9483 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9484 struct attribute
*attr
;
9486 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9489 complaint (&symfile_complaints
,
9490 _("Dwarf Error: debug entry at offset 0x%x is missing"
9491 " its dwo_id [in module %s]"),
9492 offset
.sect_off
, dwo_file
->dwo_name
);
9496 dwo_unit
->dwo_file
= dwo_file
;
9497 dwo_unit
->signature
= DW_UNSND (attr
);
9498 dwo_unit
->section
= section
;
9499 dwo_unit
->offset
= offset
;
9500 dwo_unit
->length
= cu
->per_cu
->length
;
9502 if (dwarf2_read_debug
)
9503 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9504 offset
.sect_off
, hex_string (dwo_unit
->signature
));
9507 /* Create the dwo_unit for the lone CU in DWO_FILE.
9508 Note: This function processes DWO files only, not DWP files. */
9510 static struct dwo_unit
*
9511 create_dwo_cu (struct dwo_file
*dwo_file
)
9513 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9514 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
9517 const gdb_byte
*info_ptr
, *end_ptr
;
9518 struct create_dwo_cu_data create_dwo_cu_data
;
9519 struct dwo_unit
*dwo_unit
;
9521 dwarf2_read_section (objfile
, section
);
9522 info_ptr
= section
->buffer
;
9524 if (info_ptr
== NULL
)
9527 /* We can't set abfd until now because the section may be empty or
9528 not present, in which case section->asection will be NULL. */
9529 abfd
= get_section_bfd_owner (section
);
9531 if (dwarf2_read_debug
)
9533 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9534 get_section_name (section
),
9535 get_section_file_name (section
));
9538 create_dwo_cu_data
.dwo_file
= dwo_file
;
9541 end_ptr
= info_ptr
+ section
->size
;
9542 while (info_ptr
< end_ptr
)
9544 struct dwarf2_per_cu_data per_cu
;
9546 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9547 sizeof (create_dwo_cu_data
.dwo_unit
));
9548 memset (&per_cu
, 0, sizeof (per_cu
));
9549 per_cu
.objfile
= objfile
;
9550 per_cu
.is_debug_types
= 0;
9551 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
9552 per_cu
.section
= section
;
9554 init_cutu_and_read_dies_no_follow (&per_cu
, dwo_file
,
9555 create_dwo_cu_reader
,
9556 &create_dwo_cu_data
);
9558 if (create_dwo_cu_data
.dwo_unit
.dwo_file
!= NULL
)
9560 /* If we've already found one, complain. We only support one
9561 because having more than one requires hacking the dwo_name of
9562 each to match, which is highly unlikely to happen. */
9563 if (dwo_unit
!= NULL
)
9565 complaint (&symfile_complaints
,
9566 _("Multiple CUs in DWO file %s [in module %s]"),
9567 dwo_file
->dwo_name
, objfile_name (objfile
));
9571 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9572 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9575 info_ptr
+= per_cu
.length
;
9581 /* DWP file .debug_{cu,tu}_index section format:
9582 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9586 Both index sections have the same format, and serve to map a 64-bit
9587 signature to a set of section numbers. Each section begins with a header,
9588 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9589 indexes, and a pool of 32-bit section numbers. The index sections will be
9590 aligned at 8-byte boundaries in the file.
9592 The index section header consists of:
9594 V, 32 bit version number
9596 N, 32 bit number of compilation units or type units in the index
9597 M, 32 bit number of slots in the hash table
9599 Numbers are recorded using the byte order of the application binary.
9601 The hash table begins at offset 16 in the section, and consists of an array
9602 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9603 order of the application binary). Unused slots in the hash table are 0.
9604 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9606 The parallel table begins immediately after the hash table
9607 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9608 array of 32-bit indexes (using the byte order of the application binary),
9609 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9610 table contains a 32-bit index into the pool of section numbers. For unused
9611 hash table slots, the corresponding entry in the parallel table will be 0.
9613 The pool of section numbers begins immediately following the hash table
9614 (at offset 16 + 12 * M from the beginning of the section). The pool of
9615 section numbers consists of an array of 32-bit words (using the byte order
9616 of the application binary). Each item in the array is indexed starting
9617 from 0. The hash table entry provides the index of the first section
9618 number in the set. Additional section numbers in the set follow, and the
9619 set is terminated by a 0 entry (section number 0 is not used in ELF).
9621 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9622 section must be the first entry in the set, and the .debug_abbrev.dwo must
9623 be the second entry. Other members of the set may follow in any order.
9629 DWP Version 2 combines all the .debug_info, etc. sections into one,
9630 and the entries in the index tables are now offsets into these sections.
9631 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
9634 Index Section Contents:
9636 Hash Table of Signatures dwp_hash_table.hash_table
9637 Parallel Table of Indices dwp_hash_table.unit_table
9638 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
9639 Table of Section Sizes dwp_hash_table.v2.sizes
9641 The index section header consists of:
9643 V, 32 bit version number
9644 L, 32 bit number of columns in the table of section offsets
9645 N, 32 bit number of compilation units or type units in the index
9646 M, 32 bit number of slots in the hash table
9648 Numbers are recorded using the byte order of the application binary.
9650 The hash table has the same format as version 1.
9651 The parallel table of indices has the same format as version 1,
9652 except that the entries are origin-1 indices into the table of sections
9653 offsets and the table of section sizes.
9655 The table of offsets begins immediately following the parallel table
9656 (at offset 16 + 12 * M from the beginning of the section). The table is
9657 a two-dimensional array of 32-bit words (using the byte order of the
9658 application binary), with L columns and N+1 rows, in row-major order.
9659 Each row in the array is indexed starting from 0. The first row provides
9660 a key to the remaining rows: each column in this row provides an identifier
9661 for a debug section, and the offsets in the same column of subsequent rows
9662 refer to that section. The section identifiers are:
9664 DW_SECT_INFO 1 .debug_info.dwo
9665 DW_SECT_TYPES 2 .debug_types.dwo
9666 DW_SECT_ABBREV 3 .debug_abbrev.dwo
9667 DW_SECT_LINE 4 .debug_line.dwo
9668 DW_SECT_LOC 5 .debug_loc.dwo
9669 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
9670 DW_SECT_MACINFO 7 .debug_macinfo.dwo
9671 DW_SECT_MACRO 8 .debug_macro.dwo
9673 The offsets provided by the CU and TU index sections are the base offsets
9674 for the contributions made by each CU or TU to the corresponding section
9675 in the package file. Each CU and TU header contains an abbrev_offset
9676 field, used to find the abbreviations table for that CU or TU within the
9677 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
9678 be interpreted as relative to the base offset given in the index section.
9679 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
9680 should be interpreted as relative to the base offset for .debug_line.dwo,
9681 and offsets into other debug sections obtained from DWARF attributes should
9682 also be interpreted as relative to the corresponding base offset.
9684 The table of sizes begins immediately following the table of offsets.
9685 Like the table of offsets, it is a two-dimensional array of 32-bit words,
9686 with L columns and N rows, in row-major order. Each row in the array is
9687 indexed starting from 1 (row 0 is shared by the two tables).
9691 Hash table lookup is handled the same in version 1 and 2:
9693 We assume that N and M will not exceed 2^32 - 1.
9694 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
9696 Given a 64-bit compilation unit signature or a type signature S, an entry
9697 in the hash table is located as follows:
9699 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
9700 the low-order k bits all set to 1.
9702 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
9704 3) If the hash table entry at index H matches the signature, use that
9705 entry. If the hash table entry at index H is unused (all zeroes),
9706 terminate the search: the signature is not present in the table.
9708 4) Let H = (H + H') modulo M. Repeat at Step 3.
9710 Because M > N and H' and M are relatively prime, the search is guaranteed
9711 to stop at an unused slot or find the match. */
9713 /* Create a hash table to map DWO IDs to their CU/TU entry in
9714 .debug_{info,types}.dwo in DWP_FILE.
9715 Returns NULL if there isn't one.
9716 Note: This function processes DWP files only, not DWO files. */
9718 static struct dwp_hash_table
*
9719 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
9721 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9722 bfd
*dbfd
= dwp_file
->dbfd
;
9723 const gdb_byte
*index_ptr
, *index_end
;
9724 struct dwarf2_section_info
*index
;
9725 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
9726 struct dwp_hash_table
*htab
;
9729 index
= &dwp_file
->sections
.tu_index
;
9731 index
= &dwp_file
->sections
.cu_index
;
9733 if (dwarf2_section_empty_p (index
))
9735 dwarf2_read_section (objfile
, index
);
9737 index_ptr
= index
->buffer
;
9738 index_end
= index_ptr
+ index
->size
;
9740 version
= read_4_bytes (dbfd
, index_ptr
);
9743 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
9747 nr_units
= read_4_bytes (dbfd
, index_ptr
);
9749 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
9752 if (version
!= 1 && version
!= 2)
9754 error (_("Dwarf Error: unsupported DWP file version (%s)"
9756 pulongest (version
), dwp_file
->name
);
9758 if (nr_slots
!= (nr_slots
& -nr_slots
))
9760 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
9761 " is not power of 2 [in module %s]"),
9762 pulongest (nr_slots
), dwp_file
->name
);
9765 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
9766 htab
->version
= version
;
9767 htab
->nr_columns
= nr_columns
;
9768 htab
->nr_units
= nr_units
;
9769 htab
->nr_slots
= nr_slots
;
9770 htab
->hash_table
= index_ptr
;
9771 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
9773 /* Exit early if the table is empty. */
9774 if (nr_slots
== 0 || nr_units
== 0
9775 || (version
== 2 && nr_columns
== 0))
9777 /* All must be zero. */
9778 if (nr_slots
!= 0 || nr_units
!= 0
9779 || (version
== 2 && nr_columns
!= 0))
9781 complaint (&symfile_complaints
,
9782 _("Empty DWP but nr_slots,nr_units,nr_columns not"
9783 " all zero [in modules %s]"),
9791 htab
->section_pool
.v1
.indices
=
9792 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9793 /* It's harder to decide whether the section is too small in v1.
9794 V1 is deprecated anyway so we punt. */
9798 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
9799 int *ids
= htab
->section_pool
.v2
.section_ids
;
9800 /* Reverse map for error checking. */
9801 int ids_seen
[DW_SECT_MAX
+ 1];
9806 error (_("Dwarf Error: bad DWP hash table, too few columns"
9807 " in section table [in module %s]"),
9810 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
9812 error (_("Dwarf Error: bad DWP hash table, too many columns"
9813 " in section table [in module %s]"),
9816 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9817 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
9818 for (i
= 0; i
< nr_columns
; ++i
)
9820 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
9822 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
9824 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
9825 " in section table [in module %s]"),
9826 id
, dwp_file
->name
);
9828 if (ids_seen
[id
] != -1)
9830 error (_("Dwarf Error: bad DWP hash table, duplicate section"
9831 " id %d in section table [in module %s]"),
9832 id
, dwp_file
->name
);
9837 /* Must have exactly one info or types section. */
9838 if (((ids_seen
[DW_SECT_INFO
] != -1)
9839 + (ids_seen
[DW_SECT_TYPES
] != -1))
9842 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
9843 " DWO info/types section [in module %s]"),
9846 /* Must have an abbrev section. */
9847 if (ids_seen
[DW_SECT_ABBREV
] == -1)
9849 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
9850 " section [in module %s]"),
9853 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
9854 htab
->section_pool
.v2
.sizes
=
9855 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
9856 * nr_units
* nr_columns
);
9857 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
9858 * nr_units
* nr_columns
))
9861 error (_("Dwarf Error: DWP index section is corrupt (too small)"
9870 /* Update SECTIONS with the data from SECTP.
9872 This function is like the other "locate" section routines that are
9873 passed to bfd_map_over_sections, but in this context the sections to
9874 read comes from the DWP V1 hash table, not the full ELF section table.
9876 The result is non-zero for success, or zero if an error was found. */
9879 locate_v1_virtual_dwo_sections (asection
*sectp
,
9880 struct virtual_v1_dwo_sections
*sections
)
9882 const struct dwop_section_names
*names
= &dwop_section_names
;
9884 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
9886 /* There can be only one. */
9887 if (sections
->abbrev
.s
.asection
!= NULL
)
9889 sections
->abbrev
.s
.asection
= sectp
;
9890 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
9892 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
9893 || section_is_p (sectp
->name
, &names
->types_dwo
))
9895 /* There can be only one. */
9896 if (sections
->info_or_types
.s
.asection
!= NULL
)
9898 sections
->info_or_types
.s
.asection
= sectp
;
9899 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
9901 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
9903 /* There can be only one. */
9904 if (sections
->line
.s
.asection
!= NULL
)
9906 sections
->line
.s
.asection
= sectp
;
9907 sections
->line
.size
= bfd_get_section_size (sectp
);
9909 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
9911 /* There can be only one. */
9912 if (sections
->loc
.s
.asection
!= NULL
)
9914 sections
->loc
.s
.asection
= sectp
;
9915 sections
->loc
.size
= bfd_get_section_size (sectp
);
9917 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
9919 /* There can be only one. */
9920 if (sections
->macinfo
.s
.asection
!= NULL
)
9922 sections
->macinfo
.s
.asection
= sectp
;
9923 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
9925 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
9927 /* There can be only one. */
9928 if (sections
->macro
.s
.asection
!= NULL
)
9930 sections
->macro
.s
.asection
= sectp
;
9931 sections
->macro
.size
= bfd_get_section_size (sectp
);
9933 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
9935 /* There can be only one. */
9936 if (sections
->str_offsets
.s
.asection
!= NULL
)
9938 sections
->str_offsets
.s
.asection
= sectp
;
9939 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
9943 /* No other kind of section is valid. */
9950 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
9951 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
9952 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
9953 This is for DWP version 1 files. */
9955 static struct dwo_unit
*
9956 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
9957 uint32_t unit_index
,
9958 const char *comp_dir
,
9959 ULONGEST signature
, int is_debug_types
)
9961 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9962 const struct dwp_hash_table
*dwp_htab
=
9963 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
9964 bfd
*dbfd
= dwp_file
->dbfd
;
9965 const char *kind
= is_debug_types
? "TU" : "CU";
9966 struct dwo_file
*dwo_file
;
9967 struct dwo_unit
*dwo_unit
;
9968 struct virtual_v1_dwo_sections sections
;
9969 void **dwo_file_slot
;
9970 char *virtual_dwo_name
;
9971 struct dwarf2_section_info
*cutu
;
9972 struct cleanup
*cleanups
;
9975 gdb_assert (dwp_file
->version
== 1);
9977 if (dwarf2_read_debug
)
9979 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
9981 pulongest (unit_index
), hex_string (signature
),
9985 /* Fetch the sections of this DWO unit.
9986 Put a limit on the number of sections we look for so that bad data
9987 doesn't cause us to loop forever. */
9989 #define MAX_NR_V1_DWO_SECTIONS \
9990 (1 /* .debug_info or .debug_types */ \
9991 + 1 /* .debug_abbrev */ \
9992 + 1 /* .debug_line */ \
9993 + 1 /* .debug_loc */ \
9994 + 1 /* .debug_str_offsets */ \
9995 + 1 /* .debug_macro or .debug_macinfo */ \
9996 + 1 /* trailing zero */)
9998 memset (§ions
, 0, sizeof (sections
));
9999 cleanups
= make_cleanup (null_cleanup
, 0);
10001 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10004 uint32_t section_nr
=
10005 read_4_bytes (dbfd
,
10006 dwp_htab
->section_pool
.v1
.indices
10007 + (unit_index
+ i
) * sizeof (uint32_t));
10009 if (section_nr
== 0)
10011 if (section_nr
>= dwp_file
->num_sections
)
10013 error (_("Dwarf Error: bad DWP hash table, section number too large"
10014 " [in module %s]"),
10018 sectp
= dwp_file
->elf_sections
[section_nr
];
10019 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10021 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10022 " [in module %s]"),
10028 || dwarf2_section_empty_p (§ions
.info_or_types
)
10029 || dwarf2_section_empty_p (§ions
.abbrev
))
10031 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10032 " [in module %s]"),
10035 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10037 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10038 " [in module %s]"),
10042 /* It's easier for the rest of the code if we fake a struct dwo_file and
10043 have dwo_unit "live" in that. At least for now.
10045 The DWP file can be made up of a random collection of CUs and TUs.
10046 However, for each CU + set of TUs that came from the same original DWO
10047 file, we can combine them back into a virtual DWO file to save space
10048 (fewer struct dwo_file objects to allocate). Remember that for really
10049 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10052 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10053 get_section_id (§ions
.abbrev
),
10054 get_section_id (§ions
.line
),
10055 get_section_id (§ions
.loc
),
10056 get_section_id (§ions
.str_offsets
));
10057 make_cleanup (xfree
, virtual_dwo_name
);
10058 /* Can we use an existing virtual DWO file? */
10059 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10060 /* Create one if necessary. */
10061 if (*dwo_file_slot
== NULL
)
10063 if (dwarf2_read_debug
)
10065 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10068 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10069 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10071 strlen (virtual_dwo_name
));
10072 dwo_file
->comp_dir
= comp_dir
;
10073 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10074 dwo_file
->sections
.line
= sections
.line
;
10075 dwo_file
->sections
.loc
= sections
.loc
;
10076 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10077 dwo_file
->sections
.macro
= sections
.macro
;
10078 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10079 /* The "str" section is global to the entire DWP file. */
10080 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10081 /* The info or types section is assigned below to dwo_unit,
10082 there's no need to record it in dwo_file.
10083 Also, we can't simply record type sections in dwo_file because
10084 we record a pointer into the vector in dwo_unit. As we collect more
10085 types we'll grow the vector and eventually have to reallocate space
10086 for it, invalidating all copies of pointers into the previous
10088 *dwo_file_slot
= dwo_file
;
10092 if (dwarf2_read_debug
)
10094 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10097 dwo_file
= *dwo_file_slot
;
10099 do_cleanups (cleanups
);
10101 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10102 dwo_unit
->dwo_file
= dwo_file
;
10103 dwo_unit
->signature
= signature
;
10104 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10105 sizeof (struct dwarf2_section_info
));
10106 *dwo_unit
->section
= sections
.info_or_types
;
10107 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10112 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10113 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10114 piece within that section used by a TU/CU, return a virtual section
10115 of just that piece. */
10117 static struct dwarf2_section_info
10118 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10119 bfd_size_type offset
, bfd_size_type size
)
10121 struct dwarf2_section_info result
;
10124 gdb_assert (section
!= NULL
);
10125 gdb_assert (!section
->is_virtual
);
10127 memset (&result
, 0, sizeof (result
));
10128 result
.s
.containing_section
= section
;
10129 result
.is_virtual
= 1;
10134 sectp
= get_section_bfd_section (section
);
10136 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10137 bounds of the real section. This is a pretty-rare event, so just
10138 flag an error (easier) instead of a warning and trying to cope. */
10140 || offset
+ size
> bfd_get_section_size (sectp
))
10142 bfd
*abfd
= sectp
->owner
;
10144 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10145 " in section %s [in module %s]"),
10146 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10147 objfile_name (dwarf2_per_objfile
->objfile
));
10150 result
.virtual_offset
= offset
;
10151 result
.size
= size
;
10155 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10156 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10157 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10158 This is for DWP version 2 files. */
10160 static struct dwo_unit
*
10161 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10162 uint32_t unit_index
,
10163 const char *comp_dir
,
10164 ULONGEST signature
, int is_debug_types
)
10166 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10167 const struct dwp_hash_table
*dwp_htab
=
10168 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10169 bfd
*dbfd
= dwp_file
->dbfd
;
10170 const char *kind
= is_debug_types
? "TU" : "CU";
10171 struct dwo_file
*dwo_file
;
10172 struct dwo_unit
*dwo_unit
;
10173 struct virtual_v2_dwo_sections sections
;
10174 void **dwo_file_slot
;
10175 char *virtual_dwo_name
;
10176 struct dwarf2_section_info
*cutu
;
10177 struct cleanup
*cleanups
;
10180 gdb_assert (dwp_file
->version
== 2);
10182 if (dwarf2_read_debug
)
10184 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10186 pulongest (unit_index
), hex_string (signature
),
10190 /* Fetch the section offsets of this DWO unit. */
10192 memset (§ions
, 0, sizeof (sections
));
10193 cleanups
= make_cleanup (null_cleanup
, 0);
10195 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10197 uint32_t offset
= read_4_bytes (dbfd
,
10198 dwp_htab
->section_pool
.v2
.offsets
10199 + (((unit_index
- 1) * dwp_htab
->nr_columns
10201 * sizeof (uint32_t)));
10202 uint32_t size
= read_4_bytes (dbfd
,
10203 dwp_htab
->section_pool
.v2
.sizes
10204 + (((unit_index
- 1) * dwp_htab
->nr_columns
10206 * sizeof (uint32_t)));
10208 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10211 case DW_SECT_TYPES
:
10212 sections
.info_or_types_offset
= offset
;
10213 sections
.info_or_types_size
= size
;
10215 case DW_SECT_ABBREV
:
10216 sections
.abbrev_offset
= offset
;
10217 sections
.abbrev_size
= size
;
10220 sections
.line_offset
= offset
;
10221 sections
.line_size
= size
;
10224 sections
.loc_offset
= offset
;
10225 sections
.loc_size
= size
;
10227 case DW_SECT_STR_OFFSETS
:
10228 sections
.str_offsets_offset
= offset
;
10229 sections
.str_offsets_size
= size
;
10231 case DW_SECT_MACINFO
:
10232 sections
.macinfo_offset
= offset
;
10233 sections
.macinfo_size
= size
;
10235 case DW_SECT_MACRO
:
10236 sections
.macro_offset
= offset
;
10237 sections
.macro_size
= size
;
10242 /* It's easier for the rest of the code if we fake a struct dwo_file and
10243 have dwo_unit "live" in that. At least for now.
10245 The DWP file can be made up of a random collection of CUs and TUs.
10246 However, for each CU + set of TUs that came from the same original DWO
10247 file, we can combine them back into a virtual DWO file to save space
10248 (fewer struct dwo_file objects to allocate). Remember that for really
10249 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10252 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10253 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10254 (long) (sections
.line_size
? sections
.line_offset
: 0),
10255 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10256 (long) (sections
.str_offsets_size
10257 ? sections
.str_offsets_offset
: 0));
10258 make_cleanup (xfree
, virtual_dwo_name
);
10259 /* Can we use an existing virtual DWO file? */
10260 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10261 /* Create one if necessary. */
10262 if (*dwo_file_slot
== NULL
)
10264 if (dwarf2_read_debug
)
10266 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10269 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10270 dwo_file
->dwo_name
= obstack_copy0 (&objfile
->objfile_obstack
,
10272 strlen (virtual_dwo_name
));
10273 dwo_file
->comp_dir
= comp_dir
;
10274 dwo_file
->sections
.abbrev
=
10275 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10276 sections
.abbrev_offset
, sections
.abbrev_size
);
10277 dwo_file
->sections
.line
=
10278 create_dwp_v2_section (&dwp_file
->sections
.line
,
10279 sections
.line_offset
, sections
.line_size
);
10280 dwo_file
->sections
.loc
=
10281 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10282 sections
.loc_offset
, sections
.loc_size
);
10283 dwo_file
->sections
.macinfo
=
10284 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10285 sections
.macinfo_offset
, sections
.macinfo_size
);
10286 dwo_file
->sections
.macro
=
10287 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10288 sections
.macro_offset
, sections
.macro_size
);
10289 dwo_file
->sections
.str_offsets
=
10290 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10291 sections
.str_offsets_offset
,
10292 sections
.str_offsets_size
);
10293 /* The "str" section is global to the entire DWP file. */
10294 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10295 /* The info or types section is assigned below to dwo_unit,
10296 there's no need to record it in dwo_file.
10297 Also, we can't simply record type sections in dwo_file because
10298 we record a pointer into the vector in dwo_unit. As we collect more
10299 types we'll grow the vector and eventually have to reallocate space
10300 for it, invalidating all copies of pointers into the previous
10302 *dwo_file_slot
= dwo_file
;
10306 if (dwarf2_read_debug
)
10308 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10311 dwo_file
= *dwo_file_slot
;
10313 do_cleanups (cleanups
);
10315 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10316 dwo_unit
->dwo_file
= dwo_file
;
10317 dwo_unit
->signature
= signature
;
10318 dwo_unit
->section
= obstack_alloc (&objfile
->objfile_obstack
,
10319 sizeof (struct dwarf2_section_info
));
10320 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10321 ? &dwp_file
->sections
.types
10322 : &dwp_file
->sections
.info
,
10323 sections
.info_or_types_offset
,
10324 sections
.info_or_types_size
);
10325 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10330 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10331 Returns NULL if the signature isn't found. */
10333 static struct dwo_unit
*
10334 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10335 ULONGEST signature
, int is_debug_types
)
10337 const struct dwp_hash_table
*dwp_htab
=
10338 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10339 bfd
*dbfd
= dwp_file
->dbfd
;
10340 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10341 uint32_t hash
= signature
& mask
;
10342 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10345 struct dwo_unit find_dwo_cu
, *dwo_cu
;
10347 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10348 find_dwo_cu
.signature
= signature
;
10349 slot
= htab_find_slot (is_debug_types
10350 ? dwp_file
->loaded_tus
10351 : dwp_file
->loaded_cus
,
10352 &find_dwo_cu
, INSERT
);
10357 /* Use a for loop so that we don't loop forever on bad debug info. */
10358 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10360 ULONGEST signature_in_table
;
10362 signature_in_table
=
10363 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10364 if (signature_in_table
== signature
)
10366 uint32_t unit_index
=
10367 read_4_bytes (dbfd
,
10368 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10370 if (dwp_file
->version
== 1)
10372 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10373 comp_dir
, signature
,
10378 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10379 comp_dir
, signature
,
10384 if (signature_in_table
== 0)
10386 hash
= (hash
+ hash2
) & mask
;
10389 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10390 " [in module %s]"),
10394 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10395 Open the file specified by FILE_NAME and hand it off to BFD for
10396 preliminary analysis. Return a newly initialized bfd *, which
10397 includes a canonicalized copy of FILE_NAME.
10398 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10399 SEARCH_CWD is true if the current directory is to be searched.
10400 It will be searched before debug-file-directory.
10401 If successful, the file is added to the bfd include table of the
10402 objfile's bfd (see gdb_bfd_record_inclusion).
10403 If unable to find/open the file, return NULL.
10404 NOTE: This function is derived from symfile_bfd_open. */
10407 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10411 char *absolute_name
;
10412 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10413 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10414 to debug_file_directory. */
10416 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10420 if (*debug_file_directory
!= '\0')
10421 search_path
= concat (".", dirname_separator_string
,
10422 debug_file_directory
, NULL
);
10424 search_path
= xstrdup (".");
10427 search_path
= xstrdup (debug_file_directory
);
10429 flags
= OPF_RETURN_REALPATH
;
10431 flags
|= OPF_SEARCH_IN_PATH
;
10432 desc
= openp (search_path
, flags
, file_name
,
10433 O_RDONLY
| O_BINARY
, &absolute_name
);
10434 xfree (search_path
);
10438 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
10439 xfree (absolute_name
);
10440 if (sym_bfd
== NULL
)
10442 bfd_set_cacheable (sym_bfd
, 1);
10444 if (!bfd_check_format (sym_bfd
, bfd_object
))
10446 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
10450 /* Success. Record the bfd as having been included by the objfile's bfd.
10451 This is important because things like demangled_names_hash lives in the
10452 objfile's per_bfd space and may have references to things like symbol
10453 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10454 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
);
10459 /* Try to open DWO file FILE_NAME.
10460 COMP_DIR is the DW_AT_comp_dir attribute.
10461 The result is the bfd handle of the file.
10462 If there is a problem finding or opening the file, return NULL.
10463 Upon success, the canonicalized path of the file is stored in the bfd,
10464 same as symfile_bfd_open. */
10467 open_dwo_file (const char *file_name
, const char *comp_dir
)
10471 if (IS_ABSOLUTE_PATH (file_name
))
10472 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10474 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10476 if (comp_dir
!= NULL
)
10478 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, file_name
, NULL
);
10480 /* NOTE: If comp_dir is a relative path, this will also try the
10481 search path, which seems useful. */
10482 abfd
= try_open_dwop_file (path_to_try
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10483 xfree (path_to_try
);
10488 /* That didn't work, try debug-file-directory, which, despite its name,
10489 is a list of paths. */
10491 if (*debug_file_directory
== '\0')
10494 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10497 /* This function is mapped across the sections and remembers the offset and
10498 size of each of the DWO debugging sections we are interested in. */
10501 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10503 struct dwo_sections
*dwo_sections
= dwo_sections_ptr
;
10504 const struct dwop_section_names
*names
= &dwop_section_names
;
10506 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10508 dwo_sections
->abbrev
.s
.asection
= sectp
;
10509 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10511 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10513 dwo_sections
->info
.s
.asection
= sectp
;
10514 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10516 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10518 dwo_sections
->line
.s
.asection
= sectp
;
10519 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10521 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10523 dwo_sections
->loc
.s
.asection
= sectp
;
10524 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10526 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10528 dwo_sections
->macinfo
.s
.asection
= sectp
;
10529 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10531 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10533 dwo_sections
->macro
.s
.asection
= sectp
;
10534 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10536 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10538 dwo_sections
->str
.s
.asection
= sectp
;
10539 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10541 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10543 dwo_sections
->str_offsets
.s
.asection
= sectp
;
10544 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10546 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10548 struct dwarf2_section_info type_section
;
10550 memset (&type_section
, 0, sizeof (type_section
));
10551 type_section
.s
.asection
= sectp
;
10552 type_section
.size
= bfd_get_section_size (sectp
);
10553 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10558 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10559 by PER_CU. This is for the non-DWP case.
10560 The result is NULL if DWO_NAME can't be found. */
10562 static struct dwo_file
*
10563 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10564 const char *dwo_name
, const char *comp_dir
)
10566 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10567 struct dwo_file
*dwo_file
;
10569 struct cleanup
*cleanups
;
10571 dbfd
= open_dwo_file (dwo_name
, comp_dir
);
10574 if (dwarf2_read_debug
)
10575 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10578 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10579 dwo_file
->dwo_name
= dwo_name
;
10580 dwo_file
->comp_dir
= comp_dir
;
10581 dwo_file
->dbfd
= dbfd
;
10583 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10585 bfd_map_over_sections (dbfd
, dwarf2_locate_dwo_sections
, &dwo_file
->sections
);
10587 dwo_file
->cu
= create_dwo_cu (dwo_file
);
10589 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
10590 dwo_file
->sections
.types
);
10592 discard_cleanups (cleanups
);
10594 if (dwarf2_read_debug
)
10595 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10600 /* This function is mapped across the sections and remembers the offset and
10601 size of each of the DWP debugging sections common to version 1 and 2 that
10602 we are interested in. */
10605 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10606 void *dwp_file_ptr
)
10608 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10609 const struct dwop_section_names
*names
= &dwop_section_names
;
10610 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10612 /* Record the ELF section number for later lookup: this is what the
10613 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10614 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10615 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10617 /* Look for specific sections that we need. */
10618 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10620 dwp_file
->sections
.str
.s
.asection
= sectp
;
10621 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10623 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10625 dwp_file
->sections
.cu_index
.s
.asection
= sectp
;
10626 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10628 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10630 dwp_file
->sections
.tu_index
.s
.asection
= sectp
;
10631 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
10635 /* This function is mapped across the sections and remembers the offset and
10636 size of each of the DWP version 2 debugging sections that we are interested
10637 in. This is split into a separate function because we don't know if we
10638 have version 1 or 2 until we parse the cu_index/tu_index sections. */
10641 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
10643 struct dwp_file
*dwp_file
= dwp_file_ptr
;
10644 const struct dwop_section_names
*names
= &dwop_section_names
;
10645 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10647 /* Record the ELF section number for later lookup: this is what the
10648 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10649 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10650 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10652 /* Look for specific sections that we need. */
10653 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10655 dwp_file
->sections
.abbrev
.s
.asection
= sectp
;
10656 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
10658 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10660 dwp_file
->sections
.info
.s
.asection
= sectp
;
10661 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
10663 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10665 dwp_file
->sections
.line
.s
.asection
= sectp
;
10666 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
10668 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10670 dwp_file
->sections
.loc
.s
.asection
= sectp
;
10671 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
10673 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10675 dwp_file
->sections
.macinfo
.s
.asection
= sectp
;
10676 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
10678 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10680 dwp_file
->sections
.macro
.s
.asection
= sectp
;
10681 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
10683 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10685 dwp_file
->sections
.str_offsets
.s
.asection
= sectp
;
10686 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
10688 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10690 dwp_file
->sections
.types
.s
.asection
= sectp
;
10691 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
10695 /* Hash function for dwp_file loaded CUs/TUs. */
10698 hash_dwp_loaded_cutus (const void *item
)
10700 const struct dwo_unit
*dwo_unit
= item
;
10702 /* This drops the top 32 bits of the signature, but is ok for a hash. */
10703 return dwo_unit
->signature
;
10706 /* Equality function for dwp_file loaded CUs/TUs. */
10709 eq_dwp_loaded_cutus (const void *a
, const void *b
)
10711 const struct dwo_unit
*dua
= a
;
10712 const struct dwo_unit
*dub
= b
;
10714 return dua
->signature
== dub
->signature
;
10717 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
10720 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
10722 return htab_create_alloc_ex (3,
10723 hash_dwp_loaded_cutus
,
10724 eq_dwp_loaded_cutus
,
10726 &objfile
->objfile_obstack
,
10727 hashtab_obstack_allocate
,
10728 dummy_obstack_deallocate
);
10731 /* Try to open DWP file FILE_NAME.
10732 The result is the bfd handle of the file.
10733 If there is a problem finding or opening the file, return NULL.
10734 Upon success, the canonicalized path of the file is stored in the bfd,
10735 same as symfile_bfd_open. */
10738 open_dwp_file (const char *file_name
)
10742 abfd
= try_open_dwop_file (file_name
, 1 /*is_dwp*/, 1 /*search_cwd*/);
10746 /* Work around upstream bug 15652.
10747 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
10748 [Whether that's a "bug" is debatable, but it is getting in our way.]
10749 We have no real idea where the dwp file is, because gdb's realpath-ing
10750 of the executable's path may have discarded the needed info.
10751 [IWBN if the dwp file name was recorded in the executable, akin to
10752 .gnu_debuglink, but that doesn't exist yet.]
10753 Strip the directory from FILE_NAME and search again. */
10754 if (*debug_file_directory
!= '\0')
10756 /* Don't implicitly search the current directory here.
10757 If the user wants to search "." to handle this case,
10758 it must be added to debug-file-directory. */
10759 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
10766 /* Initialize the use of the DWP file for the current objfile.
10767 By convention the name of the DWP file is ${objfile}.dwp.
10768 The result is NULL if it can't be found. */
10770 static struct dwp_file
*
10771 open_and_init_dwp_file (void)
10773 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10774 struct dwp_file
*dwp_file
;
10777 struct cleanup
*cleanups
;
10779 /* Try to find first .dwp for the binary file before any symbolic links
10781 dwp_name
= xstrprintf ("%s.dwp", objfile
->original_name
);
10782 cleanups
= make_cleanup (xfree
, dwp_name
);
10784 dbfd
= open_dwp_file (dwp_name
);
10786 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
10788 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
10789 dwp_name
= xstrprintf ("%s.dwp", objfile_name (objfile
));
10790 make_cleanup (xfree
, dwp_name
);
10791 dbfd
= open_dwp_file (dwp_name
);
10796 if (dwarf2_read_debug
)
10797 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
);
10798 do_cleanups (cleanups
);
10801 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
10802 dwp_file
->name
= bfd_get_filename (dbfd
);
10803 dwp_file
->dbfd
= dbfd
;
10804 do_cleanups (cleanups
);
10806 /* +1: section 0 is unused */
10807 dwp_file
->num_sections
= bfd_count_sections (dbfd
) + 1;
10808 dwp_file
->elf_sections
=
10809 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
10810 dwp_file
->num_sections
, asection
*);
10812 bfd_map_over_sections (dbfd
, dwarf2_locate_common_dwp_sections
, dwp_file
);
10814 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
10816 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
10818 /* The DWP file version is stored in the hash table. Oh well. */
10819 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
10821 /* Technically speaking, we should try to limp along, but this is
10822 pretty bizarre. We use pulongest here because that's the established
10823 portability solution (e.g, we cannot use %u for uint32_t). */
10824 error (_("Dwarf Error: DWP file CU version %s doesn't match"
10825 " TU version %s [in DWP file %s]"),
10826 pulongest (dwp_file
->cus
->version
),
10827 pulongest (dwp_file
->tus
->version
), dwp_name
);
10829 dwp_file
->version
= dwp_file
->cus
->version
;
10831 if (dwp_file
->version
== 2)
10832 bfd_map_over_sections (dbfd
, dwarf2_locate_v2_dwp_sections
, dwp_file
);
10834 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
10835 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
10837 if (dwarf2_read_debug
)
10839 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
10840 fprintf_unfiltered (gdb_stdlog
,
10841 " %s CUs, %s TUs\n",
10842 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
10843 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
10849 /* Wrapper around open_and_init_dwp_file, only open it once. */
10851 static struct dwp_file
*
10852 get_dwp_file (void)
10854 if (! dwarf2_per_objfile
->dwp_checked
)
10856 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
10857 dwarf2_per_objfile
->dwp_checked
= 1;
10859 return dwarf2_per_objfile
->dwp_file
;
10862 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
10863 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
10864 or in the DWP file for the objfile, referenced by THIS_UNIT.
10865 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
10866 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
10868 This is called, for example, when wanting to read a variable with a
10869 complex location. Therefore we don't want to do file i/o for every call.
10870 Therefore we don't want to look for a DWO file on every call.
10871 Therefore we first see if we've already seen SIGNATURE in a DWP file,
10872 then we check if we've already seen DWO_NAME, and only THEN do we check
10875 The result is a pointer to the dwo_unit object or NULL if we didn't find it
10876 (dwo_id mismatch or couldn't find the DWO/DWP file). */
10878 static struct dwo_unit
*
10879 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
10880 const char *dwo_name
, const char *comp_dir
,
10881 ULONGEST signature
, int is_debug_types
)
10883 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10884 const char *kind
= is_debug_types
? "TU" : "CU";
10885 void **dwo_file_slot
;
10886 struct dwo_file
*dwo_file
;
10887 struct dwp_file
*dwp_file
;
10889 /* First see if there's a DWP file.
10890 If we have a DWP file but didn't find the DWO inside it, don't
10891 look for the original DWO file. It makes gdb behave differently
10892 depending on whether one is debugging in the build tree. */
10894 dwp_file
= get_dwp_file ();
10895 if (dwp_file
!= NULL
)
10897 const struct dwp_hash_table
*dwp_htab
=
10898 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10900 if (dwp_htab
!= NULL
)
10902 struct dwo_unit
*dwo_cutu
=
10903 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
10904 signature
, is_debug_types
);
10906 if (dwo_cutu
!= NULL
)
10908 if (dwarf2_read_debug
)
10910 fprintf_unfiltered (gdb_stdlog
,
10911 "Virtual DWO %s %s found: @%s\n",
10912 kind
, hex_string (signature
),
10913 host_address_to_string (dwo_cutu
));
10921 /* No DWP file, look for the DWO file. */
10923 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
10924 if (*dwo_file_slot
== NULL
)
10926 /* Read in the file and build a table of the CUs/TUs it contains. */
10927 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
10929 /* NOTE: This will be NULL if unable to open the file. */
10930 dwo_file
= *dwo_file_slot
;
10932 if (dwo_file
!= NULL
)
10934 struct dwo_unit
*dwo_cutu
= NULL
;
10936 if (is_debug_types
&& dwo_file
->tus
)
10938 struct dwo_unit find_dwo_cutu
;
10940 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
10941 find_dwo_cutu
.signature
= signature
;
10942 dwo_cutu
= htab_find (dwo_file
->tus
, &find_dwo_cutu
);
10944 else if (!is_debug_types
&& dwo_file
->cu
)
10946 if (signature
== dwo_file
->cu
->signature
)
10947 dwo_cutu
= dwo_file
->cu
;
10950 if (dwo_cutu
!= NULL
)
10952 if (dwarf2_read_debug
)
10954 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
10955 kind
, dwo_name
, hex_string (signature
),
10956 host_address_to_string (dwo_cutu
));
10963 /* We didn't find it. This could mean a dwo_id mismatch, or
10964 someone deleted the DWO/DWP file, or the search path isn't set up
10965 correctly to find the file. */
10967 if (dwarf2_read_debug
)
10969 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
10970 kind
, dwo_name
, hex_string (signature
));
10973 /* This is a warning and not a complaint because it can be caused by
10974 pilot error (e.g., user accidentally deleting the DWO). */
10976 /* Print the name of the DWP file if we looked there, helps the user
10977 better diagnose the problem. */
10978 char *dwp_text
= NULL
;
10979 struct cleanup
*cleanups
;
10981 if (dwp_file
!= NULL
)
10982 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
10983 cleanups
= make_cleanup (xfree
, dwp_text
);
10985 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
10986 " [in module %s]"),
10987 kind
, dwo_name
, hex_string (signature
),
10988 dwp_text
!= NULL
? dwp_text
: "",
10989 this_unit
->is_debug_types
? "TU" : "CU",
10990 this_unit
->offset
.sect_off
, objfile_name (objfile
));
10992 do_cleanups (cleanups
);
10997 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
10998 See lookup_dwo_cutu_unit for details. */
11000 static struct dwo_unit
*
11001 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11002 const char *dwo_name
, const char *comp_dir
,
11003 ULONGEST signature
)
11005 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11008 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11009 See lookup_dwo_cutu_unit for details. */
11011 static struct dwo_unit
*
11012 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11013 const char *dwo_name
, const char *comp_dir
)
11015 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11018 /* Traversal function for queue_and_load_all_dwo_tus. */
11021 queue_and_load_dwo_tu (void **slot
, void *info
)
11023 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11024 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11025 ULONGEST signature
= dwo_unit
->signature
;
11026 struct signatured_type
*sig_type
=
11027 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11029 if (sig_type
!= NULL
)
11031 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11033 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11034 a real dependency of PER_CU on SIG_TYPE. That is detected later
11035 while processing PER_CU. */
11036 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11037 load_full_type_unit (sig_cu
);
11038 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11044 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11045 The DWO may have the only definition of the type, though it may not be
11046 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11047 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11050 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11052 struct dwo_unit
*dwo_unit
;
11053 struct dwo_file
*dwo_file
;
11055 gdb_assert (!per_cu
->is_debug_types
);
11056 gdb_assert (get_dwp_file () == NULL
);
11057 gdb_assert (per_cu
->cu
!= NULL
);
11059 dwo_unit
= per_cu
->cu
->dwo_unit
;
11060 gdb_assert (dwo_unit
!= NULL
);
11062 dwo_file
= dwo_unit
->dwo_file
;
11063 if (dwo_file
->tus
!= NULL
)
11064 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11067 /* Free all resources associated with DWO_FILE.
11068 Close the DWO file and munmap the sections.
11069 All memory should be on the objfile obstack. */
11072 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11075 struct dwarf2_section_info
*section
;
11077 /* Note: dbfd is NULL for virtual DWO files. */
11078 gdb_bfd_unref (dwo_file
->dbfd
);
11080 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11083 /* Wrapper for free_dwo_file for use in cleanups. */
11086 free_dwo_file_cleanup (void *arg
)
11088 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11089 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11091 free_dwo_file (dwo_file
, objfile
);
11094 /* Traversal function for free_dwo_files. */
11097 free_dwo_file_from_slot (void **slot
, void *info
)
11099 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11100 struct objfile
*objfile
= (struct objfile
*) info
;
11102 free_dwo_file (dwo_file
, objfile
);
11107 /* Free all resources associated with DWO_FILES. */
11110 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11112 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11115 /* Read in various DIEs. */
11117 /* qsort helper for inherit_abstract_dies. */
11120 unsigned_int_compar (const void *ap
, const void *bp
)
11122 unsigned int a
= *(unsigned int *) ap
;
11123 unsigned int b
= *(unsigned int *) bp
;
11125 return (a
> b
) - (b
> a
);
11128 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11129 Inherit only the children of the DW_AT_abstract_origin DIE not being
11130 already referenced by DW_AT_abstract_origin from the children of the
11134 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11136 struct die_info
*child_die
;
11137 unsigned die_children_count
;
11138 /* CU offsets which were referenced by children of the current DIE. */
11139 sect_offset
*offsets
;
11140 sect_offset
*offsets_end
, *offsetp
;
11141 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11142 struct die_info
*origin_die
;
11143 /* Iterator of the ORIGIN_DIE children. */
11144 struct die_info
*origin_child_die
;
11145 struct cleanup
*cleanups
;
11146 struct attribute
*attr
;
11147 struct dwarf2_cu
*origin_cu
;
11148 struct pending
**origin_previous_list_in_scope
;
11150 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11154 /* Note that following die references may follow to a die in a
11158 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11160 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11162 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11163 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11165 if (die
->tag
!= origin_die
->tag
11166 && !(die
->tag
== DW_TAG_inlined_subroutine
11167 && origin_die
->tag
== DW_TAG_subprogram
))
11168 complaint (&symfile_complaints
,
11169 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11170 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
11172 child_die
= die
->child
;
11173 die_children_count
= 0;
11174 while (child_die
&& child_die
->tag
)
11176 child_die
= sibling_die (child_die
);
11177 die_children_count
++;
11179 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
11180 cleanups
= make_cleanup (xfree
, offsets
);
11182 offsets_end
= offsets
;
11183 child_die
= die
->child
;
11184 while (child_die
&& child_die
->tag
)
11186 /* For each CHILD_DIE, find the corresponding child of
11187 ORIGIN_DIE. If there is more than one layer of
11188 DW_AT_abstract_origin, follow them all; there shouldn't be,
11189 but GCC versions at least through 4.4 generate this (GCC PR
11191 struct die_info
*child_origin_die
= child_die
;
11192 struct dwarf2_cu
*child_origin_cu
= cu
;
11196 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11200 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11204 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11205 counterpart may exist. */
11206 if (child_origin_die
!= child_die
)
11208 if (child_die
->tag
!= child_origin_die
->tag
11209 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11210 && child_origin_die
->tag
== DW_TAG_subprogram
))
11211 complaint (&symfile_complaints
,
11212 _("Child DIE 0x%x and its abstract origin 0x%x have "
11213 "different tags"), child_die
->offset
.sect_off
,
11214 child_origin_die
->offset
.sect_off
);
11215 if (child_origin_die
->parent
!= origin_die
)
11216 complaint (&symfile_complaints
,
11217 _("Child DIE 0x%x and its abstract origin 0x%x have "
11218 "different parents"), child_die
->offset
.sect_off
,
11219 child_origin_die
->offset
.sect_off
);
11221 *offsets_end
++ = child_origin_die
->offset
;
11223 child_die
= sibling_die (child_die
);
11225 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11226 unsigned_int_compar
);
11227 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11228 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
11229 complaint (&symfile_complaints
,
11230 _("Multiple children of DIE 0x%x refer "
11231 "to DIE 0x%x as their abstract origin"),
11232 die
->offset
.sect_off
, offsetp
->sect_off
);
11235 origin_child_die
= origin_die
->child
;
11236 while (origin_child_die
&& origin_child_die
->tag
)
11238 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11239 while (offsetp
< offsets_end
11240 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
11242 if (offsetp
>= offsets_end
11243 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
11245 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11246 Check whether we're already processing ORIGIN_CHILD_DIE.
11247 This can happen with mutually referenced abstract_origins.
11249 if (!origin_child_die
->in_process
)
11250 process_die (origin_child_die
, origin_cu
);
11252 origin_child_die
= sibling_die (origin_child_die
);
11254 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11256 do_cleanups (cleanups
);
11260 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11262 struct objfile
*objfile
= cu
->objfile
;
11263 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11264 struct context_stack
*new;
11267 struct die_info
*child_die
;
11268 struct attribute
*attr
, *call_line
, *call_file
;
11270 CORE_ADDR baseaddr
;
11271 struct block
*block
;
11272 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11273 VEC (symbolp
) *template_args
= NULL
;
11274 struct template_symbol
*templ_func
= NULL
;
11278 /* If we do not have call site information, we can't show the
11279 caller of this inlined function. That's too confusing, so
11280 only use the scope for local variables. */
11281 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11282 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11283 if (call_line
== NULL
|| call_file
== NULL
)
11285 read_lexical_block_scope (die
, cu
);
11290 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11292 name
= dwarf2_name (die
, cu
);
11294 /* Ignore functions with missing or empty names. These are actually
11295 illegal according to the DWARF standard. */
11298 complaint (&symfile_complaints
,
11299 _("missing name for subprogram DIE at %d"),
11300 die
->offset
.sect_off
);
11304 /* Ignore functions with missing or invalid low and high pc attributes. */
11305 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11307 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11308 if (!attr
|| !DW_UNSND (attr
))
11309 complaint (&symfile_complaints
,
11310 _("cannot get low and high bounds "
11311 "for subprogram DIE at %d"),
11312 die
->offset
.sect_off
);
11316 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11317 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11319 /* If we have any template arguments, then we must allocate a
11320 different sort of symbol. */
11321 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11323 if (child_die
->tag
== DW_TAG_template_type_param
11324 || child_die
->tag
== DW_TAG_template_value_param
)
11326 templ_func
= allocate_template_symbol (objfile
);
11327 templ_func
->base
.is_cplus_template_function
= 1;
11332 new = push_context (0, lowpc
);
11333 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11334 (struct symbol
*) templ_func
);
11336 /* If there is a location expression for DW_AT_frame_base, record
11338 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11340 dwarf2_symbol_mark_computed (attr
, new->name
, cu
, 1);
11342 cu
->list_in_scope
= &local_symbols
;
11344 if (die
->child
!= NULL
)
11346 child_die
= die
->child
;
11347 while (child_die
&& child_die
->tag
)
11349 if (child_die
->tag
== DW_TAG_template_type_param
11350 || child_die
->tag
== DW_TAG_template_value_param
)
11352 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11355 VEC_safe_push (symbolp
, template_args
, arg
);
11358 process_die (child_die
, cu
);
11359 child_die
= sibling_die (child_die
);
11363 inherit_abstract_dies (die
, cu
);
11365 /* If we have a DW_AT_specification, we might need to import using
11366 directives from the context of the specification DIE. See the
11367 comment in determine_prefix. */
11368 if (cu
->language
== language_cplus
11369 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11371 struct dwarf2_cu
*spec_cu
= cu
;
11372 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11376 child_die
= spec_die
->child
;
11377 while (child_die
&& child_die
->tag
)
11379 if (child_die
->tag
== DW_TAG_imported_module
)
11380 process_die (child_die
, spec_cu
);
11381 child_die
= sibling_die (child_die
);
11384 /* In some cases, GCC generates specification DIEs that
11385 themselves contain DW_AT_specification attributes. */
11386 spec_die
= die_specification (spec_die
, &spec_cu
);
11390 new = pop_context ();
11391 /* Make a block for the local symbols within. */
11392 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
11395 /* For C++, set the block's scope. */
11396 if ((cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
11397 && cu
->processing_has_namespace_info
)
11398 block_set_scope (block
, determine_prefix (die
, cu
),
11399 &objfile
->objfile_obstack
);
11401 /* If we have address ranges, record them. */
11402 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11404 gdbarch_make_symbol_special (gdbarch
, new->name
, objfile
);
11406 /* Attach template arguments to function. */
11407 if (! VEC_empty (symbolp
, template_args
))
11409 gdb_assert (templ_func
!= NULL
);
11411 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11412 templ_func
->template_arguments
11413 = obstack_alloc (&objfile
->objfile_obstack
,
11414 (templ_func
->n_template_arguments
11415 * sizeof (struct symbol
*)));
11416 memcpy (templ_func
->template_arguments
,
11417 VEC_address (symbolp
, template_args
),
11418 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11419 VEC_free (symbolp
, template_args
);
11422 /* In C++, we can have functions nested inside functions (e.g., when
11423 a function declares a class that has methods). This means that
11424 when we finish processing a function scope, we may need to go
11425 back to building a containing block's symbol lists. */
11426 local_symbols
= new->locals
;
11427 using_directives
= new->using_directives
;
11429 /* If we've finished processing a top-level function, subsequent
11430 symbols go in the file symbol list. */
11431 if (outermost_context_p ())
11432 cu
->list_in_scope
= &file_symbols
;
11435 /* Process all the DIES contained within a lexical block scope. Start
11436 a new scope, process the dies, and then close the scope. */
11439 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11441 struct objfile
*objfile
= cu
->objfile
;
11442 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11443 struct context_stack
*new;
11444 CORE_ADDR lowpc
, highpc
;
11445 struct die_info
*child_die
;
11446 CORE_ADDR baseaddr
;
11448 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11450 /* Ignore blocks with missing or invalid low and high pc attributes. */
11451 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11452 as multiple lexical blocks? Handling children in a sane way would
11453 be nasty. Might be easier to properly extend generic blocks to
11454 describe ranges. */
11455 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11457 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11458 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11460 push_context (0, lowpc
);
11461 if (die
->child
!= NULL
)
11463 child_die
= die
->child
;
11464 while (child_die
&& child_die
->tag
)
11466 process_die (child_die
, cu
);
11467 child_die
= sibling_die (child_die
);
11470 new = pop_context ();
11472 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
11474 struct block
*block
11475 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
11478 /* Note that recording ranges after traversing children, as we
11479 do here, means that recording a parent's ranges entails
11480 walking across all its children's ranges as they appear in
11481 the address map, which is quadratic behavior.
11483 It would be nicer to record the parent's ranges before
11484 traversing its children, simply overriding whatever you find
11485 there. But since we don't even decide whether to create a
11486 block until after we've traversed its children, that's hard
11488 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11490 local_symbols
= new->locals
;
11491 using_directives
= new->using_directives
;
11494 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
11497 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11499 struct objfile
*objfile
= cu
->objfile
;
11500 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11501 CORE_ADDR pc
, baseaddr
;
11502 struct attribute
*attr
;
11503 struct call_site
*call_site
, call_site_local
;
11506 struct die_info
*child_die
;
11508 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11510 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11513 complaint (&symfile_complaints
,
11514 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
11515 "DIE 0x%x [in module %s]"),
11516 die
->offset
.sect_off
, objfile_name (objfile
));
11519 pc
= attr_value_as_address (attr
) + baseaddr
;
11520 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11522 if (cu
->call_site_htab
== NULL
)
11523 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11524 NULL
, &objfile
->objfile_obstack
,
11525 hashtab_obstack_allocate
, NULL
);
11526 call_site_local
.pc
= pc
;
11527 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11530 complaint (&symfile_complaints
,
11531 _("Duplicate PC %s for DW_TAG_GNU_call_site "
11532 "DIE 0x%x [in module %s]"),
11533 paddress (gdbarch
, pc
), die
->offset
.sect_off
,
11534 objfile_name (objfile
));
11538 /* Count parameters at the caller. */
11541 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11542 child_die
= sibling_die (child_die
))
11544 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11546 complaint (&symfile_complaints
,
11547 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
11548 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11549 child_die
->tag
, child_die
->offset
.sect_off
,
11550 objfile_name (objfile
));
11557 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
11558 (sizeof (*call_site
)
11559 + (sizeof (*call_site
->parameter
)
11560 * (nparams
- 1))));
11562 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11563 call_site
->pc
= pc
;
11565 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11567 struct die_info
*func_die
;
11569 /* Skip also over DW_TAG_inlined_subroutine. */
11570 for (func_die
= die
->parent
;
11571 func_die
&& func_die
->tag
!= DW_TAG_subprogram
11572 && func_die
->tag
!= DW_TAG_subroutine_type
;
11573 func_die
= func_die
->parent
);
11575 /* DW_AT_GNU_all_call_sites is a superset
11576 of DW_AT_GNU_all_tail_call_sites. */
11578 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
11579 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
11581 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
11582 not complete. But keep CALL_SITE for look ups via call_site_htab,
11583 both the initial caller containing the real return address PC and
11584 the final callee containing the current PC of a chain of tail
11585 calls do not need to have the tail call list complete. But any
11586 function candidate for a virtual tail call frame searched via
11587 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
11588 determined unambiguously. */
11592 struct type
*func_type
= NULL
;
11595 func_type
= get_die_type (func_die
, cu
);
11596 if (func_type
!= NULL
)
11598 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
11600 /* Enlist this call site to the function. */
11601 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
11602 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
11605 complaint (&symfile_complaints
,
11606 _("Cannot find function owning DW_TAG_GNU_call_site "
11607 "DIE 0x%x [in module %s]"),
11608 die
->offset
.sect_off
, objfile_name (objfile
));
11612 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
11614 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11615 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
11616 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
11617 /* Keep NULL DWARF_BLOCK. */;
11618 else if (attr_form_is_block (attr
))
11620 struct dwarf2_locexpr_baton
*dlbaton
;
11622 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
11623 dlbaton
->data
= DW_BLOCK (attr
)->data
;
11624 dlbaton
->size
= DW_BLOCK (attr
)->size
;
11625 dlbaton
->per_cu
= cu
->per_cu
;
11627 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
11629 else if (attr_form_is_ref (attr
))
11631 struct dwarf2_cu
*target_cu
= cu
;
11632 struct die_info
*target_die
;
11634 target_die
= follow_die_ref (die
, attr
, &target_cu
);
11635 gdb_assert (target_cu
->objfile
== objfile
);
11636 if (die_is_declaration (target_die
, target_cu
))
11638 const char *target_physname
= NULL
;
11639 struct attribute
*target_attr
;
11641 /* Prefer the mangled name; otherwise compute the demangled one. */
11642 target_attr
= dwarf2_attr (target_die
, DW_AT_linkage_name
, target_cu
);
11643 if (target_attr
== NULL
)
11644 target_attr
= dwarf2_attr (target_die
, DW_AT_MIPS_linkage_name
,
11646 if (target_attr
!= NULL
&& DW_STRING (target_attr
) != NULL
)
11647 target_physname
= DW_STRING (target_attr
);
11649 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
11650 if (target_physname
== NULL
)
11651 complaint (&symfile_complaints
,
11652 _("DW_AT_GNU_call_site_target target DIE has invalid "
11653 "physname, for referencing DIE 0x%x [in module %s]"),
11654 die
->offset
.sect_off
, objfile_name (objfile
));
11656 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
11662 /* DW_AT_entry_pc should be preferred. */
11663 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
11664 complaint (&symfile_complaints
,
11665 _("DW_AT_GNU_call_site_target target DIE has invalid "
11666 "low pc, for referencing DIE 0x%x [in module %s]"),
11667 die
->offset
.sect_off
, objfile_name (objfile
));
11670 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11671 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
11676 complaint (&symfile_complaints
,
11677 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
11678 "block nor reference, for DIE 0x%x [in module %s]"),
11679 die
->offset
.sect_off
, objfile_name (objfile
));
11681 call_site
->per_cu
= cu
->per_cu
;
11683 for (child_die
= die
->child
;
11684 child_die
&& child_die
->tag
;
11685 child_die
= sibling_die (child_die
))
11687 struct call_site_parameter
*parameter
;
11688 struct attribute
*loc
, *origin
;
11690 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11692 /* Already printed the complaint above. */
11696 gdb_assert (call_site
->parameter_count
< nparams
);
11697 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
11699 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
11700 specifies DW_TAG_formal_parameter. Value of the data assumed for the
11701 register is contained in DW_AT_GNU_call_site_value. */
11703 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
11704 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
11705 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
11707 sect_offset offset
;
11709 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
11710 offset
= dwarf2_get_ref_die_offset (origin
);
11711 if (!offset_in_cu_p (&cu
->header
, offset
))
11713 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
11714 binding can be done only inside one CU. Such referenced DIE
11715 therefore cannot be even moved to DW_TAG_partial_unit. */
11716 complaint (&symfile_complaints
,
11717 _("DW_AT_abstract_origin offset is not in CU for "
11718 "DW_TAG_GNU_call_site child DIE 0x%x "
11720 child_die
->offset
.sect_off
, objfile_name (objfile
));
11723 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
11724 - cu
->header
.offset
.sect_off
);
11726 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
11728 complaint (&symfile_complaints
,
11729 _("No DW_FORM_block* DW_AT_location for "
11730 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11731 child_die
->offset
.sect_off
, objfile_name (objfile
));
11736 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
11737 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
11738 if (parameter
->u
.dwarf_reg
!= -1)
11739 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
11740 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
11741 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
11742 ¶meter
->u
.fb_offset
))
11743 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
11746 complaint (&symfile_complaints
,
11747 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
11748 "for DW_FORM_block* DW_AT_location is supported for "
11749 "DW_TAG_GNU_call_site child DIE 0x%x "
11751 child_die
->offset
.sect_off
, objfile_name (objfile
));
11756 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
11757 if (!attr_form_is_block (attr
))
11759 complaint (&symfile_complaints
,
11760 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
11761 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11762 child_die
->offset
.sect_off
, objfile_name (objfile
));
11765 parameter
->value
= DW_BLOCK (attr
)->data
;
11766 parameter
->value_size
= DW_BLOCK (attr
)->size
;
11768 /* Parameters are not pre-cleared by memset above. */
11769 parameter
->data_value
= NULL
;
11770 parameter
->data_value_size
= 0;
11771 call_site
->parameter_count
++;
11773 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
11776 if (!attr_form_is_block (attr
))
11777 complaint (&symfile_complaints
,
11778 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
11779 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
11780 child_die
->offset
.sect_off
, objfile_name (objfile
));
11783 parameter
->data_value
= DW_BLOCK (attr
)->data
;
11784 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
11790 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
11791 Return 1 if the attributes are present and valid, otherwise, return 0.
11792 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
11795 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
11796 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
11797 struct partial_symtab
*ranges_pst
)
11799 struct objfile
*objfile
= cu
->objfile
;
11800 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11801 struct comp_unit_head
*cu_header
= &cu
->header
;
11802 bfd
*obfd
= objfile
->obfd
;
11803 unsigned int addr_size
= cu_header
->addr_size
;
11804 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
11805 /* Base address selection entry. */
11808 unsigned int dummy
;
11809 const gdb_byte
*buffer
;
11813 CORE_ADDR high
= 0;
11814 CORE_ADDR baseaddr
;
11816 found_base
= cu
->base_known
;
11817 base
= cu
->base_address
;
11819 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
11820 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
11822 complaint (&symfile_complaints
,
11823 _("Offset %d out of bounds for DW_AT_ranges attribute"),
11827 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
11829 /* Read in the largest possible address. */
11830 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
11831 if ((marker
& mask
) == mask
)
11833 /* If we found the largest possible address, then
11834 read the base address. */
11835 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11836 buffer
+= 2 * addr_size
;
11837 offset
+= 2 * addr_size
;
11843 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11847 CORE_ADDR range_beginning
, range_end
;
11849 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
11850 buffer
+= addr_size
;
11851 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
11852 buffer
+= addr_size
;
11853 offset
+= 2 * addr_size
;
11855 /* An end of list marker is a pair of zero addresses. */
11856 if (range_beginning
== 0 && range_end
== 0)
11857 /* Found the end of list entry. */
11860 /* Each base address selection entry is a pair of 2 values.
11861 The first is the largest possible address, the second is
11862 the base address. Check for a base address here. */
11863 if ((range_beginning
& mask
) == mask
)
11865 /* If we found the largest possible address, then
11866 read the base address. */
11867 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
11874 /* We have no valid base address for the ranges
11876 complaint (&symfile_complaints
,
11877 _("Invalid .debug_ranges data (no base address)"));
11881 if (range_beginning
> range_end
)
11883 /* Inverted range entries are invalid. */
11884 complaint (&symfile_complaints
,
11885 _("Invalid .debug_ranges data (inverted range)"));
11889 /* Empty range entries have no effect. */
11890 if (range_beginning
== range_end
)
11893 range_beginning
+= base
;
11896 /* A not-uncommon case of bad debug info.
11897 Don't pollute the addrmap with bad data. */
11898 if (range_beginning
+ baseaddr
== 0
11899 && !dwarf2_per_objfile
->has_section_at_zero
)
11901 complaint (&symfile_complaints
,
11902 _(".debug_ranges entry has start address of zero"
11903 " [in module %s]"), objfile_name (objfile
));
11907 if (ranges_pst
!= NULL
)
11912 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11913 range_beginning
+ baseaddr
);
11914 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
11915 range_end
+ baseaddr
);
11916 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
11920 /* FIXME: This is recording everything as a low-high
11921 segment of consecutive addresses. We should have a
11922 data structure for discontiguous block ranges
11926 low
= range_beginning
;
11932 if (range_beginning
< low
)
11933 low
= range_beginning
;
11934 if (range_end
> high
)
11940 /* If the first entry is an end-of-list marker, the range
11941 describes an empty scope, i.e. no instructions. */
11947 *high_return
= high
;
11951 /* Get low and high pc attributes from a die. Return 1 if the attributes
11952 are present and valid, otherwise, return 0. Return -1 if the range is
11953 discontinuous, i.e. derived from DW_AT_ranges information. */
11956 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
11957 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
11958 struct partial_symtab
*pst
)
11960 struct attribute
*attr
;
11961 struct attribute
*attr_high
;
11963 CORE_ADDR high
= 0;
11966 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
11969 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11972 low
= attr_value_as_address (attr
);
11973 high
= attr_value_as_address (attr_high
);
11974 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
11978 /* Found high w/o low attribute. */
11981 /* Found consecutive range of addresses. */
11986 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
11989 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
11990 We take advantage of the fact that DW_AT_ranges does not appear
11991 in DW_TAG_compile_unit of DWO files. */
11992 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
11993 unsigned int ranges_offset
= (DW_UNSND (attr
)
11994 + (need_ranges_base
11998 /* Value of the DW_AT_ranges attribute is the offset in the
11999 .debug_ranges section. */
12000 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12002 /* Found discontinuous range of addresses. */
12007 /* read_partial_die has also the strict LOW < HIGH requirement. */
12011 /* When using the GNU linker, .gnu.linkonce. sections are used to
12012 eliminate duplicate copies of functions and vtables and such.
12013 The linker will arbitrarily choose one and discard the others.
12014 The AT_*_pc values for such functions refer to local labels in
12015 these sections. If the section from that file was discarded, the
12016 labels are not in the output, so the relocs get a value of 0.
12017 If this is a discarded function, mark the pc bounds as invalid,
12018 so that GDB will ignore it. */
12019 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12028 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12029 its low and high PC addresses. Do nothing if these addresses could not
12030 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12031 and HIGHPC to the high address if greater than HIGHPC. */
12034 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12035 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12036 struct dwarf2_cu
*cu
)
12038 CORE_ADDR low
, high
;
12039 struct die_info
*child
= die
->child
;
12041 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
12043 *lowpc
= min (*lowpc
, low
);
12044 *highpc
= max (*highpc
, high
);
12047 /* If the language does not allow nested subprograms (either inside
12048 subprograms or lexical blocks), we're done. */
12049 if (cu
->language
!= language_ada
)
12052 /* Check all the children of the given DIE. If it contains nested
12053 subprograms, then check their pc bounds. Likewise, we need to
12054 check lexical blocks as well, as they may also contain subprogram
12056 while (child
&& child
->tag
)
12058 if (child
->tag
== DW_TAG_subprogram
12059 || child
->tag
== DW_TAG_lexical_block
)
12060 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12061 child
= sibling_die (child
);
12065 /* Get the low and high pc's represented by the scope DIE, and store
12066 them in *LOWPC and *HIGHPC. If the correct values can't be
12067 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12070 get_scope_pc_bounds (struct die_info
*die
,
12071 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12072 struct dwarf2_cu
*cu
)
12074 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12075 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12076 CORE_ADDR current_low
, current_high
;
12078 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
12080 best_low
= current_low
;
12081 best_high
= current_high
;
12085 struct die_info
*child
= die
->child
;
12087 while (child
&& child
->tag
)
12089 switch (child
->tag
) {
12090 case DW_TAG_subprogram
:
12091 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12093 case DW_TAG_namespace
:
12094 case DW_TAG_module
:
12095 /* FIXME: carlton/2004-01-16: Should we do this for
12096 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12097 that current GCC's always emit the DIEs corresponding
12098 to definitions of methods of classes as children of a
12099 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12100 the DIEs giving the declarations, which could be
12101 anywhere). But I don't see any reason why the
12102 standards says that they have to be there. */
12103 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12105 if (current_low
!= ((CORE_ADDR
) -1))
12107 best_low
= min (best_low
, current_low
);
12108 best_high
= max (best_high
, current_high
);
12116 child
= sibling_die (child
);
12121 *highpc
= best_high
;
12124 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12128 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12129 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12131 struct objfile
*objfile
= cu
->objfile
;
12132 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12133 struct attribute
*attr
;
12134 struct attribute
*attr_high
;
12136 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12139 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12142 CORE_ADDR low
= attr_value_as_address (attr
);
12143 CORE_ADDR high
= attr_value_as_address (attr_high
);
12145 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12148 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12149 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12150 record_block_range (block
, low
, high
- 1);
12154 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12157 bfd
*obfd
= objfile
->obfd
;
12158 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12159 We take advantage of the fact that DW_AT_ranges does not appear
12160 in DW_TAG_compile_unit of DWO files. */
12161 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12163 /* The value of the DW_AT_ranges attribute is the offset of the
12164 address range list in the .debug_ranges section. */
12165 unsigned long offset
= (DW_UNSND (attr
)
12166 + (need_ranges_base
? cu
->ranges_base
: 0));
12167 const gdb_byte
*buffer
;
12169 /* For some target architectures, but not others, the
12170 read_address function sign-extends the addresses it returns.
12171 To recognize base address selection entries, we need a
12173 unsigned int addr_size
= cu
->header
.addr_size
;
12174 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12176 /* The base address, to which the next pair is relative. Note
12177 that this 'base' is a DWARF concept: most entries in a range
12178 list are relative, to reduce the number of relocs against the
12179 debugging information. This is separate from this function's
12180 'baseaddr' argument, which GDB uses to relocate debugging
12181 information from a shared library based on the address at
12182 which the library was loaded. */
12183 CORE_ADDR base
= cu
->base_address
;
12184 int base_known
= cu
->base_known
;
12186 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12187 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12189 complaint (&symfile_complaints
,
12190 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
12194 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12198 unsigned int bytes_read
;
12199 CORE_ADDR start
, end
;
12201 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12202 buffer
+= bytes_read
;
12203 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12204 buffer
+= bytes_read
;
12206 /* Did we find the end of the range list? */
12207 if (start
== 0 && end
== 0)
12210 /* Did we find a base address selection entry? */
12211 else if ((start
& base_select_mask
) == base_select_mask
)
12217 /* We found an ordinary address range. */
12222 complaint (&symfile_complaints
,
12223 _("Invalid .debug_ranges data "
12224 "(no base address)"));
12230 /* Inverted range entries are invalid. */
12231 complaint (&symfile_complaints
,
12232 _("Invalid .debug_ranges data "
12233 "(inverted range)"));
12237 /* Empty range entries have no effect. */
12241 start
+= base
+ baseaddr
;
12242 end
+= base
+ baseaddr
;
12244 /* A not-uncommon case of bad debug info.
12245 Don't pollute the addrmap with bad data. */
12246 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12248 complaint (&symfile_complaints
,
12249 _(".debug_ranges entry has start address of zero"
12250 " [in module %s]"), objfile_name (objfile
));
12254 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12255 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12256 record_block_range (block
, start
, end
- 1);
12262 /* Check whether the producer field indicates either of GCC < 4.6, or the
12263 Intel C/C++ compiler, and cache the result in CU. */
12266 check_producer (struct dwarf2_cu
*cu
)
12271 if (cu
->producer
== NULL
)
12273 /* For unknown compilers expect their behavior is DWARF version
12276 GCC started to support .debug_types sections by -gdwarf-4 since
12277 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12278 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12279 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12280 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12282 else if ((major
= producer_is_gcc (cu
->producer
, &minor
)) > 0)
12284 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12285 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12287 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
12288 cu
->producer_is_icc
= 1;
12291 /* For other non-GCC compilers, expect their behavior is DWARF version
12295 cu
->checked_producer
= 1;
12298 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12299 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12300 during 4.6.0 experimental. */
12303 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12305 if (!cu
->checked_producer
)
12306 check_producer (cu
);
12308 return cu
->producer_is_gxx_lt_4_6
;
12311 /* Return the default accessibility type if it is not overriden by
12312 DW_AT_accessibility. */
12314 static enum dwarf_access_attribute
12315 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12317 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12319 /* The default DWARF 2 accessibility for members is public, the default
12320 accessibility for inheritance is private. */
12322 if (die
->tag
!= DW_TAG_inheritance
)
12323 return DW_ACCESS_public
;
12325 return DW_ACCESS_private
;
12329 /* DWARF 3+ defines the default accessibility a different way. The same
12330 rules apply now for DW_TAG_inheritance as for the members and it only
12331 depends on the container kind. */
12333 if (die
->parent
->tag
== DW_TAG_class_type
)
12334 return DW_ACCESS_private
;
12336 return DW_ACCESS_public
;
12340 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12341 offset. If the attribute was not found return 0, otherwise return
12342 1. If it was found but could not properly be handled, set *OFFSET
12346 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12349 struct attribute
*attr
;
12351 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12356 /* Note that we do not check for a section offset first here.
12357 This is because DW_AT_data_member_location is new in DWARF 4,
12358 so if we see it, we can assume that a constant form is really
12359 a constant and not a section offset. */
12360 if (attr_form_is_constant (attr
))
12361 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12362 else if (attr_form_is_section_offset (attr
))
12363 dwarf2_complex_location_expr_complaint ();
12364 else if (attr_form_is_block (attr
))
12365 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12367 dwarf2_complex_location_expr_complaint ();
12375 /* Add an aggregate field to the field list. */
12378 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12379 struct dwarf2_cu
*cu
)
12381 struct objfile
*objfile
= cu
->objfile
;
12382 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12383 struct nextfield
*new_field
;
12384 struct attribute
*attr
;
12386 const char *fieldname
= "";
12388 /* Allocate a new field list entry and link it in. */
12389 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
12390 make_cleanup (xfree
, new_field
);
12391 memset (new_field
, 0, sizeof (struct nextfield
));
12393 if (die
->tag
== DW_TAG_inheritance
)
12395 new_field
->next
= fip
->baseclasses
;
12396 fip
->baseclasses
= new_field
;
12400 new_field
->next
= fip
->fields
;
12401 fip
->fields
= new_field
;
12405 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12407 new_field
->accessibility
= DW_UNSND (attr
);
12409 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12410 if (new_field
->accessibility
!= DW_ACCESS_public
)
12411 fip
->non_public_fields
= 1;
12413 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12415 new_field
->virtuality
= DW_UNSND (attr
);
12417 new_field
->virtuality
= DW_VIRTUALITY_none
;
12419 fp
= &new_field
->field
;
12421 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
12425 /* Data member other than a C++ static data member. */
12427 /* Get type of field. */
12428 fp
->type
= die_type (die
, cu
);
12430 SET_FIELD_BITPOS (*fp
, 0);
12432 /* Get bit size of field (zero if none). */
12433 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
12436 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
12440 FIELD_BITSIZE (*fp
) = 0;
12443 /* Get bit offset of field. */
12444 if (handle_data_member_location (die
, cu
, &offset
))
12445 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12446 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
12449 if (gdbarch_bits_big_endian (gdbarch
))
12451 /* For big endian bits, the DW_AT_bit_offset gives the
12452 additional bit offset from the MSB of the containing
12453 anonymous object to the MSB of the field. We don't
12454 have to do anything special since we don't need to
12455 know the size of the anonymous object. */
12456 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
12460 /* For little endian bits, compute the bit offset to the
12461 MSB of the anonymous object, subtract off the number of
12462 bits from the MSB of the field to the MSB of the
12463 object, and then subtract off the number of bits of
12464 the field itself. The result is the bit offset of
12465 the LSB of the field. */
12466 int anonymous_size
;
12467 int bit_offset
= DW_UNSND (attr
);
12469 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
12472 /* The size of the anonymous object containing
12473 the bit field is explicit, so use the
12474 indicated size (in bytes). */
12475 anonymous_size
= DW_UNSND (attr
);
12479 /* The size of the anonymous object containing
12480 the bit field must be inferred from the type
12481 attribute of the data member containing the
12483 anonymous_size
= TYPE_LENGTH (fp
->type
);
12485 SET_FIELD_BITPOS (*fp
,
12486 (FIELD_BITPOS (*fp
)
12487 + anonymous_size
* bits_per_byte
12488 - bit_offset
- FIELD_BITSIZE (*fp
)));
12492 /* Get name of field. */
12493 fieldname
= dwarf2_name (die
, cu
);
12494 if (fieldname
== NULL
)
12497 /* The name is already allocated along with this objfile, so we don't
12498 need to duplicate it for the type. */
12499 fp
->name
= fieldname
;
12501 /* Change accessibility for artificial fields (e.g. virtual table
12502 pointer or virtual base class pointer) to private. */
12503 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
12505 FIELD_ARTIFICIAL (*fp
) = 1;
12506 new_field
->accessibility
= DW_ACCESS_private
;
12507 fip
->non_public_fields
= 1;
12510 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
12512 /* C++ static member. */
12514 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
12515 is a declaration, but all versions of G++ as of this writing
12516 (so through at least 3.2.1) incorrectly generate
12517 DW_TAG_variable tags. */
12519 const char *physname
;
12521 /* Get name of field. */
12522 fieldname
= dwarf2_name (die
, cu
);
12523 if (fieldname
== NULL
)
12526 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
12528 /* Only create a symbol if this is an external value.
12529 new_symbol checks this and puts the value in the global symbol
12530 table, which we want. If it is not external, new_symbol
12531 will try to put the value in cu->list_in_scope which is wrong. */
12532 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
12534 /* A static const member, not much different than an enum as far as
12535 we're concerned, except that we can support more types. */
12536 new_symbol (die
, NULL
, cu
);
12539 /* Get physical name. */
12540 physname
= dwarf2_physname (fieldname
, die
, cu
);
12542 /* The name is already allocated along with this objfile, so we don't
12543 need to duplicate it for the type. */
12544 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
12545 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12546 FIELD_NAME (*fp
) = fieldname
;
12548 else if (die
->tag
== DW_TAG_inheritance
)
12552 /* C++ base class field. */
12553 if (handle_data_member_location (die
, cu
, &offset
))
12554 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
12555 FIELD_BITSIZE (*fp
) = 0;
12556 FIELD_TYPE (*fp
) = die_type (die
, cu
);
12557 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
12558 fip
->nbaseclasses
++;
12562 /* Add a typedef defined in the scope of the FIP's class. */
12565 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
12566 struct dwarf2_cu
*cu
)
12568 struct objfile
*objfile
= cu
->objfile
;
12569 struct typedef_field_list
*new_field
;
12570 struct attribute
*attr
;
12571 struct typedef_field
*fp
;
12572 char *fieldname
= "";
12574 /* Allocate a new field list entry and link it in. */
12575 new_field
= xzalloc (sizeof (*new_field
));
12576 make_cleanup (xfree
, new_field
);
12578 gdb_assert (die
->tag
== DW_TAG_typedef
);
12580 fp
= &new_field
->field
;
12582 /* Get name of field. */
12583 fp
->name
= dwarf2_name (die
, cu
);
12584 if (fp
->name
== NULL
)
12587 fp
->type
= read_type_die (die
, cu
);
12589 new_field
->next
= fip
->typedef_field_list
;
12590 fip
->typedef_field_list
= new_field
;
12591 fip
->typedef_field_list_count
++;
12594 /* Create the vector of fields, and attach it to the type. */
12597 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
12598 struct dwarf2_cu
*cu
)
12600 int nfields
= fip
->nfields
;
12602 /* Record the field count, allocate space for the array of fields,
12603 and create blank accessibility bitfields if necessary. */
12604 TYPE_NFIELDS (type
) = nfields
;
12605 TYPE_FIELDS (type
) = (struct field
*)
12606 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
12607 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
12609 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
12611 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12613 TYPE_FIELD_PRIVATE_BITS (type
) =
12614 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12615 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
12617 TYPE_FIELD_PROTECTED_BITS (type
) =
12618 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12619 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
12621 TYPE_FIELD_IGNORE_BITS (type
) =
12622 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
12623 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
12626 /* If the type has baseclasses, allocate and clear a bit vector for
12627 TYPE_FIELD_VIRTUAL_BITS. */
12628 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
12630 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
12631 unsigned char *pointer
;
12633 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12634 pointer
= TYPE_ALLOC (type
, num_bytes
);
12635 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
12636 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
12637 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
12640 /* Copy the saved-up fields into the field vector. Start from the head of
12641 the list, adding to the tail of the field array, so that they end up in
12642 the same order in the array in which they were added to the list. */
12643 while (nfields
-- > 0)
12645 struct nextfield
*fieldp
;
12649 fieldp
= fip
->fields
;
12650 fip
->fields
= fieldp
->next
;
12654 fieldp
= fip
->baseclasses
;
12655 fip
->baseclasses
= fieldp
->next
;
12658 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
12659 switch (fieldp
->accessibility
)
12661 case DW_ACCESS_private
:
12662 if (cu
->language
!= language_ada
)
12663 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
12666 case DW_ACCESS_protected
:
12667 if (cu
->language
!= language_ada
)
12668 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
12671 case DW_ACCESS_public
:
12675 /* Unknown accessibility. Complain and treat it as public. */
12677 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
12678 fieldp
->accessibility
);
12682 if (nfields
< fip
->nbaseclasses
)
12684 switch (fieldp
->virtuality
)
12686 case DW_VIRTUALITY_virtual
:
12687 case DW_VIRTUALITY_pure_virtual
:
12688 if (cu
->language
== language_ada
)
12689 error (_("unexpected virtuality in component of Ada type"));
12690 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
12697 /* Return true if this member function is a constructor, false
12701 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
12703 const char *fieldname
;
12704 const char *typename
;
12707 if (die
->parent
== NULL
)
12710 if (die
->parent
->tag
!= DW_TAG_structure_type
12711 && die
->parent
->tag
!= DW_TAG_union_type
12712 && die
->parent
->tag
!= DW_TAG_class_type
)
12715 fieldname
= dwarf2_name (die
, cu
);
12716 typename
= dwarf2_name (die
->parent
, cu
);
12717 if (fieldname
== NULL
|| typename
== NULL
)
12720 len
= strlen (fieldname
);
12721 return (strncmp (fieldname
, typename
, len
) == 0
12722 && (typename
[len
] == '\0' || typename
[len
] == '<'));
12725 /* Add a member function to the proper fieldlist. */
12728 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
12729 struct type
*type
, struct dwarf2_cu
*cu
)
12731 struct objfile
*objfile
= cu
->objfile
;
12732 struct attribute
*attr
;
12733 struct fnfieldlist
*flp
;
12735 struct fn_field
*fnp
;
12736 const char *fieldname
;
12737 struct nextfnfield
*new_fnfield
;
12738 struct type
*this_type
;
12739 enum dwarf_access_attribute accessibility
;
12741 if (cu
->language
== language_ada
)
12742 error (_("unexpected member function in Ada type"));
12744 /* Get name of member function. */
12745 fieldname
= dwarf2_name (die
, cu
);
12746 if (fieldname
== NULL
)
12749 /* Look up member function name in fieldlist. */
12750 for (i
= 0; i
< fip
->nfnfields
; i
++)
12752 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
12756 /* Create new list element if necessary. */
12757 if (i
< fip
->nfnfields
)
12758 flp
= &fip
->fnfieldlists
[i
];
12761 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
12763 fip
->fnfieldlists
= (struct fnfieldlist
*)
12764 xrealloc (fip
->fnfieldlists
,
12765 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
12766 * sizeof (struct fnfieldlist
));
12767 if (fip
->nfnfields
== 0)
12768 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
12770 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
12771 flp
->name
= fieldname
;
12774 i
= fip
->nfnfields
++;
12777 /* Create a new member function field and chain it to the field list
12779 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
12780 make_cleanup (xfree
, new_fnfield
);
12781 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
12782 new_fnfield
->next
= flp
->head
;
12783 flp
->head
= new_fnfield
;
12786 /* Fill in the member function field info. */
12787 fnp
= &new_fnfield
->fnfield
;
12789 /* Delay processing of the physname until later. */
12790 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
12792 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
12797 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
12798 fnp
->physname
= physname
? physname
: "";
12801 fnp
->type
= alloc_type (objfile
);
12802 this_type
= read_type_die (die
, cu
);
12803 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
12805 int nparams
= TYPE_NFIELDS (this_type
);
12807 /* TYPE is the domain of this method, and THIS_TYPE is the type
12808 of the method itself (TYPE_CODE_METHOD). */
12809 smash_to_method_type (fnp
->type
, type
,
12810 TYPE_TARGET_TYPE (this_type
),
12811 TYPE_FIELDS (this_type
),
12812 TYPE_NFIELDS (this_type
),
12813 TYPE_VARARGS (this_type
));
12815 /* Handle static member functions.
12816 Dwarf2 has no clean way to discern C++ static and non-static
12817 member functions. G++ helps GDB by marking the first
12818 parameter for non-static member functions (which is the this
12819 pointer) as artificial. We obtain this information from
12820 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
12821 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
12822 fnp
->voffset
= VOFFSET_STATIC
;
12825 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
12826 dwarf2_full_name (fieldname
, die
, cu
));
12828 /* Get fcontext from DW_AT_containing_type if present. */
12829 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
12830 fnp
->fcontext
= die_containing_type (die
, cu
);
12832 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
12833 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
12835 /* Get accessibility. */
12836 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12838 accessibility
= DW_UNSND (attr
);
12840 accessibility
= dwarf2_default_access_attribute (die
, cu
);
12841 switch (accessibility
)
12843 case DW_ACCESS_private
:
12844 fnp
->is_private
= 1;
12846 case DW_ACCESS_protected
:
12847 fnp
->is_protected
= 1;
12851 /* Check for artificial methods. */
12852 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
12853 if (attr
&& DW_UNSND (attr
) != 0)
12854 fnp
->is_artificial
= 1;
12856 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
12858 /* Get index in virtual function table if it is a virtual member
12859 function. For older versions of GCC, this is an offset in the
12860 appropriate virtual table, as specified by DW_AT_containing_type.
12861 For everyone else, it is an expression to be evaluated relative
12862 to the object address. */
12864 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
12867 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
12869 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
12871 /* Old-style GCC. */
12872 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
12874 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12875 || (DW_BLOCK (attr
)->size
> 1
12876 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
12877 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
12879 struct dwarf_block blk
;
12882 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
12884 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
12885 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
12886 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12887 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
12888 dwarf2_complex_location_expr_complaint ();
12890 fnp
->voffset
/= cu
->header
.addr_size
;
12894 dwarf2_complex_location_expr_complaint ();
12896 if (!fnp
->fcontext
)
12897 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
12899 else if (attr_form_is_section_offset (attr
))
12901 dwarf2_complex_location_expr_complaint ();
12905 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
12911 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12912 if (attr
&& DW_UNSND (attr
))
12914 /* GCC does this, as of 2008-08-25; PR debug/37237. */
12915 complaint (&symfile_complaints
,
12916 _("Member function \"%s\" (offset %d) is virtual "
12917 "but the vtable offset is not specified"),
12918 fieldname
, die
->offset
.sect_off
);
12919 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12920 TYPE_CPLUS_DYNAMIC (type
) = 1;
12925 /* Create the vector of member function fields, and attach it to the type. */
12928 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
12929 struct dwarf2_cu
*cu
)
12931 struct fnfieldlist
*flp
;
12934 if (cu
->language
== language_ada
)
12935 error (_("unexpected member functions in Ada type"));
12937 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
12938 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
12939 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
12941 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
12943 struct nextfnfield
*nfp
= flp
->head
;
12944 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
12947 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
12948 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
12949 fn_flp
->fn_fields
= (struct fn_field
*)
12950 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
12951 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
12952 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
12955 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
12958 /* Returns non-zero if NAME is the name of a vtable member in CU's
12959 language, zero otherwise. */
12961 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
12963 static const char vptr
[] = "_vptr";
12964 static const char vtable
[] = "vtable";
12966 /* Look for the C++ and Java forms of the vtable. */
12967 if ((cu
->language
== language_java
12968 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
12969 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
12970 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
12976 /* GCC outputs unnamed structures that are really pointers to member
12977 functions, with the ABI-specified layout. If TYPE describes
12978 such a structure, smash it into a member function type.
12980 GCC shouldn't do this; it should just output pointer to member DIEs.
12981 This is GCC PR debug/28767. */
12984 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
12986 struct type
*pfn_type
, *domain_type
, *new_type
;
12988 /* Check for a structure with no name and two children. */
12989 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
12992 /* Check for __pfn and __delta members. */
12993 if (TYPE_FIELD_NAME (type
, 0) == NULL
12994 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
12995 || TYPE_FIELD_NAME (type
, 1) == NULL
12996 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
12999 /* Find the type of the method. */
13000 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13001 if (pfn_type
== NULL
13002 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13003 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13006 /* Look for the "this" argument. */
13007 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13008 if (TYPE_NFIELDS (pfn_type
) == 0
13009 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13010 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13013 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13014 new_type
= alloc_type (objfile
);
13015 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
13016 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13017 TYPE_VARARGS (pfn_type
));
13018 smash_to_methodptr_type (type
, new_type
);
13021 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13025 producer_is_icc (struct dwarf2_cu
*cu
)
13027 if (!cu
->checked_producer
)
13028 check_producer (cu
);
13030 return cu
->producer_is_icc
;
13033 /* Called when we find the DIE that starts a structure or union scope
13034 (definition) to create a type for the structure or union. Fill in
13035 the type's name and general properties; the members will not be
13036 processed until process_structure_scope. A symbol table entry for
13037 the type will also not be done until process_structure_scope (assuming
13038 the type has a name).
13040 NOTE: we need to call these functions regardless of whether or not the
13041 DIE has a DW_AT_name attribute, since it might be an anonymous
13042 structure or union. This gets the type entered into our set of
13043 user defined types. */
13045 static struct type
*
13046 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13048 struct objfile
*objfile
= cu
->objfile
;
13050 struct attribute
*attr
;
13053 /* If the definition of this type lives in .debug_types, read that type.
13054 Don't follow DW_AT_specification though, that will take us back up
13055 the chain and we want to go down. */
13056 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13059 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13061 /* The type's CU may not be the same as CU.
13062 Ensure TYPE is recorded with CU in die_type_hash. */
13063 return set_die_type (die
, type
, cu
);
13066 type
= alloc_type (objfile
);
13067 INIT_CPLUS_SPECIFIC (type
);
13069 name
= dwarf2_name (die
, cu
);
13072 if (cu
->language
== language_cplus
13073 || cu
->language
== language_java
)
13075 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13077 /* dwarf2_full_name might have already finished building the DIE's
13078 type. If so, there is no need to continue. */
13079 if (get_die_type (die
, cu
) != NULL
)
13080 return get_die_type (die
, cu
);
13082 TYPE_TAG_NAME (type
) = full_name
;
13083 if (die
->tag
== DW_TAG_structure_type
13084 || die
->tag
== DW_TAG_class_type
)
13085 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13089 /* The name is already allocated along with this objfile, so
13090 we don't need to duplicate it for the type. */
13091 TYPE_TAG_NAME (type
) = name
;
13092 if (die
->tag
== DW_TAG_class_type
)
13093 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13097 if (die
->tag
== DW_TAG_structure_type
)
13099 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13101 else if (die
->tag
== DW_TAG_union_type
)
13103 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13107 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13110 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13111 TYPE_DECLARED_CLASS (type
) = 1;
13113 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13116 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13120 TYPE_LENGTH (type
) = 0;
13123 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13125 /* ICC does not output the required DW_AT_declaration
13126 on incomplete types, but gives them a size of zero. */
13127 TYPE_STUB (type
) = 1;
13130 TYPE_STUB_SUPPORTED (type
) = 1;
13132 if (die_is_declaration (die
, cu
))
13133 TYPE_STUB (type
) = 1;
13134 else if (attr
== NULL
&& die
->child
== NULL
13135 && producer_is_realview (cu
->producer
))
13136 /* RealView does not output the required DW_AT_declaration
13137 on incomplete types. */
13138 TYPE_STUB (type
) = 1;
13140 /* We need to add the type field to the die immediately so we don't
13141 infinitely recurse when dealing with pointers to the structure
13142 type within the structure itself. */
13143 set_die_type (die
, type
, cu
);
13145 /* set_die_type should be already done. */
13146 set_descriptive_type (type
, die
, cu
);
13151 /* Finish creating a structure or union type, including filling in
13152 its members and creating a symbol for it. */
13155 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13157 struct objfile
*objfile
= cu
->objfile
;
13158 struct die_info
*child_die
;
13161 type
= get_die_type (die
, cu
);
13163 type
= read_structure_type (die
, cu
);
13165 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13167 struct field_info fi
;
13168 VEC (symbolp
) *template_args
= NULL
;
13169 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13171 memset (&fi
, 0, sizeof (struct field_info
));
13173 child_die
= die
->child
;
13175 while (child_die
&& child_die
->tag
)
13177 if (child_die
->tag
== DW_TAG_member
13178 || child_die
->tag
== DW_TAG_variable
)
13180 /* NOTE: carlton/2002-11-05: A C++ static data member
13181 should be a DW_TAG_member that is a declaration, but
13182 all versions of G++ as of this writing (so through at
13183 least 3.2.1) incorrectly generate DW_TAG_variable
13184 tags for them instead. */
13185 dwarf2_add_field (&fi
, child_die
, cu
);
13187 else if (child_die
->tag
== DW_TAG_subprogram
)
13189 /* C++ member function. */
13190 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13192 else if (child_die
->tag
== DW_TAG_inheritance
)
13194 /* C++ base class field. */
13195 dwarf2_add_field (&fi
, child_die
, cu
);
13197 else if (child_die
->tag
== DW_TAG_typedef
)
13198 dwarf2_add_typedef (&fi
, child_die
, cu
);
13199 else if (child_die
->tag
== DW_TAG_template_type_param
13200 || child_die
->tag
== DW_TAG_template_value_param
)
13202 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13205 VEC_safe_push (symbolp
, template_args
, arg
);
13208 child_die
= sibling_die (child_die
);
13211 /* Attach template arguments to type. */
13212 if (! VEC_empty (symbolp
, template_args
))
13214 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13215 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13216 = VEC_length (symbolp
, template_args
);
13217 TYPE_TEMPLATE_ARGUMENTS (type
)
13218 = obstack_alloc (&objfile
->objfile_obstack
,
13219 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13220 * sizeof (struct symbol
*)));
13221 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13222 VEC_address (symbolp
, template_args
),
13223 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13224 * sizeof (struct symbol
*)));
13225 VEC_free (symbolp
, template_args
);
13228 /* Attach fields and member functions to the type. */
13230 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13233 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13235 /* Get the type which refers to the base class (possibly this
13236 class itself) which contains the vtable pointer for the current
13237 class from the DW_AT_containing_type attribute. This use of
13238 DW_AT_containing_type is a GNU extension. */
13240 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13242 struct type
*t
= die_containing_type (die
, cu
);
13244 TYPE_VPTR_BASETYPE (type
) = t
;
13249 /* Our own class provides vtbl ptr. */
13250 for (i
= TYPE_NFIELDS (t
) - 1;
13251 i
>= TYPE_N_BASECLASSES (t
);
13254 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13256 if (is_vtable_name (fieldname
, cu
))
13258 TYPE_VPTR_FIELDNO (type
) = i
;
13263 /* Complain if virtual function table field not found. */
13264 if (i
< TYPE_N_BASECLASSES (t
))
13265 complaint (&symfile_complaints
,
13266 _("virtual function table pointer "
13267 "not found when defining class '%s'"),
13268 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13273 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
13276 else if (cu
->producer
13277 && strncmp (cu
->producer
,
13278 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
13280 /* The IBM XLC compiler does not provide direct indication
13281 of the containing type, but the vtable pointer is
13282 always named __vfp. */
13286 for (i
= TYPE_NFIELDS (type
) - 1;
13287 i
>= TYPE_N_BASECLASSES (type
);
13290 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13292 TYPE_VPTR_FIELDNO (type
) = i
;
13293 TYPE_VPTR_BASETYPE (type
) = type
;
13300 /* Copy fi.typedef_field_list linked list elements content into the
13301 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13302 if (fi
.typedef_field_list
)
13304 int i
= fi
.typedef_field_list_count
;
13306 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13307 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13308 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
13309 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13311 /* Reverse the list order to keep the debug info elements order. */
13314 struct typedef_field
*dest
, *src
;
13316 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13317 src
= &fi
.typedef_field_list
->field
;
13318 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13323 do_cleanups (back_to
);
13325 if (HAVE_CPLUS_STRUCT (type
))
13326 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
13329 quirk_gcc_member_function_pointer (type
, objfile
);
13331 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13332 snapshots) has been known to create a die giving a declaration
13333 for a class that has, as a child, a die giving a definition for a
13334 nested class. So we have to process our children even if the
13335 current die is a declaration. Normally, of course, a declaration
13336 won't have any children at all. */
13338 child_die
= die
->child
;
13340 while (child_die
!= NULL
&& child_die
->tag
)
13342 if (child_die
->tag
== DW_TAG_member
13343 || child_die
->tag
== DW_TAG_variable
13344 || child_die
->tag
== DW_TAG_inheritance
13345 || child_die
->tag
== DW_TAG_template_value_param
13346 || child_die
->tag
== DW_TAG_template_type_param
)
13351 process_die (child_die
, cu
);
13353 child_die
= sibling_die (child_die
);
13356 /* Do not consider external references. According to the DWARF standard,
13357 these DIEs are identified by the fact that they have no byte_size
13358 attribute, and a declaration attribute. */
13359 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13360 || !die_is_declaration (die
, cu
))
13361 new_symbol (die
, type
, cu
);
13364 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13365 update TYPE using some information only available in DIE's children. */
13368 update_enumeration_type_from_children (struct die_info
*die
,
13370 struct dwarf2_cu
*cu
)
13372 struct obstack obstack
;
13373 struct die_info
*child_die
;
13374 int unsigned_enum
= 1;
13377 struct cleanup
*old_chain
;
13379 obstack_init (&obstack
);
13380 old_chain
= make_cleanup_obstack_free (&obstack
);
13382 for (child_die
= die
->child
;
13383 child_die
!= NULL
&& child_die
->tag
;
13384 child_die
= sibling_die (child_die
))
13386 struct attribute
*attr
;
13388 const gdb_byte
*bytes
;
13389 struct dwarf2_locexpr_baton
*baton
;
13392 if (child_die
->tag
!= DW_TAG_enumerator
)
13395 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13399 name
= dwarf2_name (child_die
, cu
);
13401 name
= "<anonymous enumerator>";
13403 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
13404 &value
, &bytes
, &baton
);
13410 else if ((mask
& value
) != 0)
13415 /* If we already know that the enum type is neither unsigned, nor
13416 a flag type, no need to look at the rest of the enumerates. */
13417 if (!unsigned_enum
&& !flag_enum
)
13422 TYPE_UNSIGNED (type
) = 1;
13424 TYPE_FLAG_ENUM (type
) = 1;
13426 do_cleanups (old_chain
);
13429 /* Given a DW_AT_enumeration_type die, set its type. We do not
13430 complete the type's fields yet, or create any symbols. */
13432 static struct type
*
13433 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13435 struct objfile
*objfile
= cu
->objfile
;
13437 struct attribute
*attr
;
13440 /* If the definition of this type lives in .debug_types, read that type.
13441 Don't follow DW_AT_specification though, that will take us back up
13442 the chain and we want to go down. */
13443 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13446 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13448 /* The type's CU may not be the same as CU.
13449 Ensure TYPE is recorded with CU in die_type_hash. */
13450 return set_die_type (die
, type
, cu
);
13453 type
= alloc_type (objfile
);
13455 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
13456 name
= dwarf2_full_name (NULL
, die
, cu
);
13458 TYPE_TAG_NAME (type
) = name
;
13460 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13463 struct type
*underlying_type
= die_type (die
, cu
);
13465 TYPE_TARGET_TYPE (type
) = underlying_type
;
13468 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13471 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13475 TYPE_LENGTH (type
) = 0;
13478 /* The enumeration DIE can be incomplete. In Ada, any type can be
13479 declared as private in the package spec, and then defined only
13480 inside the package body. Such types are known as Taft Amendment
13481 Types. When another package uses such a type, an incomplete DIE
13482 may be generated by the compiler. */
13483 if (die_is_declaration (die
, cu
))
13484 TYPE_STUB (type
) = 1;
13486 /* Finish the creation of this type by using the enum's children.
13487 We must call this even when the underlying type has been provided
13488 so that we can determine if we're looking at a "flag" enum. */
13489 update_enumeration_type_from_children (die
, type
, cu
);
13491 /* If this type has an underlying type that is not a stub, then we
13492 may use its attributes. We always use the "unsigned" attribute
13493 in this situation, because ordinarily we guess whether the type
13494 is unsigned -- but the guess can be wrong and the underlying type
13495 can tell us the reality. However, we defer to a local size
13496 attribute if one exists, because this lets the compiler override
13497 the underlying type if needed. */
13498 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
13500 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
13501 if (TYPE_LENGTH (type
) == 0)
13502 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
13505 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
13507 return set_die_type (die
, type
, cu
);
13510 /* Given a pointer to a die which begins an enumeration, process all
13511 the dies that define the members of the enumeration, and create the
13512 symbol for the enumeration type.
13514 NOTE: We reverse the order of the element list. */
13517 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13519 struct type
*this_type
;
13521 this_type
= get_die_type (die
, cu
);
13522 if (this_type
== NULL
)
13523 this_type
= read_enumeration_type (die
, cu
);
13525 if (die
->child
!= NULL
)
13527 struct die_info
*child_die
;
13528 struct symbol
*sym
;
13529 struct field
*fields
= NULL
;
13530 int num_fields
= 0;
13533 child_die
= die
->child
;
13534 while (child_die
&& child_die
->tag
)
13536 if (child_die
->tag
!= DW_TAG_enumerator
)
13538 process_die (child_die
, cu
);
13542 name
= dwarf2_name (child_die
, cu
);
13545 sym
= new_symbol (child_die
, this_type
, cu
);
13547 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13549 fields
= (struct field
*)
13551 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
13552 * sizeof (struct field
));
13555 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
13556 FIELD_TYPE (fields
[num_fields
]) = NULL
;
13557 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
13558 FIELD_BITSIZE (fields
[num_fields
]) = 0;
13564 child_die
= sibling_die (child_die
);
13569 TYPE_NFIELDS (this_type
) = num_fields
;
13570 TYPE_FIELDS (this_type
) = (struct field
*)
13571 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
13572 memcpy (TYPE_FIELDS (this_type
), fields
,
13573 sizeof (struct field
) * num_fields
);
13578 /* If we are reading an enum from a .debug_types unit, and the enum
13579 is a declaration, and the enum is not the signatured type in the
13580 unit, then we do not want to add a symbol for it. Adding a
13581 symbol would in some cases obscure the true definition of the
13582 enum, giving users an incomplete type when the definition is
13583 actually available. Note that we do not want to do this for all
13584 enums which are just declarations, because C++0x allows forward
13585 enum declarations. */
13586 if (cu
->per_cu
->is_debug_types
13587 && die_is_declaration (die
, cu
))
13589 struct signatured_type
*sig_type
;
13591 sig_type
= (struct signatured_type
*) cu
->per_cu
;
13592 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
13593 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
13597 new_symbol (die
, this_type
, cu
);
13600 /* Extract all information from a DW_TAG_array_type DIE and put it in
13601 the DIE's type field. For now, this only handles one dimensional
13604 static struct type
*
13605 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13607 struct objfile
*objfile
= cu
->objfile
;
13608 struct die_info
*child_die
;
13610 struct type
*element_type
, *range_type
, *index_type
;
13611 struct type
**range_types
= NULL
;
13612 struct attribute
*attr
;
13614 struct cleanup
*back_to
;
13616 unsigned int bit_stride
= 0;
13618 element_type
= die_type (die
, cu
);
13620 /* The die_type call above may have already set the type for this DIE. */
13621 type
= get_die_type (die
, cu
);
13625 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
13627 bit_stride
= DW_UNSND (attr
) * 8;
13629 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
13631 bit_stride
= DW_UNSND (attr
);
13633 /* Irix 6.2 native cc creates array types without children for
13634 arrays with unspecified length. */
13635 if (die
->child
== NULL
)
13637 index_type
= objfile_type (objfile
)->builtin_int
;
13638 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
13639 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
13641 return set_die_type (die
, type
, cu
);
13644 back_to
= make_cleanup (null_cleanup
, NULL
);
13645 child_die
= die
->child
;
13646 while (child_die
&& child_die
->tag
)
13648 if (child_die
->tag
== DW_TAG_subrange_type
)
13650 struct type
*child_type
= read_type_die (child_die
, cu
);
13652 if (child_type
!= NULL
)
13654 /* The range type was succesfully read. Save it for the
13655 array type creation. */
13656 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
13658 range_types
= (struct type
**)
13659 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
13660 * sizeof (struct type
*));
13662 make_cleanup (free_current_contents
, &range_types
);
13664 range_types
[ndim
++] = child_type
;
13667 child_die
= sibling_die (child_die
);
13670 /* Dwarf2 dimensions are output from left to right, create the
13671 necessary array types in backwards order. */
13673 type
= element_type
;
13675 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
13680 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
13686 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
13690 /* Understand Dwarf2 support for vector types (like they occur on
13691 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
13692 array type. This is not part of the Dwarf2/3 standard yet, but a
13693 custom vendor extension. The main difference between a regular
13694 array and the vector variant is that vectors are passed by value
13696 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
13698 make_vector_type (type
);
13700 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
13701 implementation may choose to implement triple vectors using this
13703 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13706 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
13707 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13709 complaint (&symfile_complaints
,
13710 _("DW_AT_byte_size for array type smaller "
13711 "than the total size of elements"));
13714 name
= dwarf2_name (die
, cu
);
13716 TYPE_NAME (type
) = name
;
13718 /* Install the type in the die. */
13719 set_die_type (die
, type
, cu
);
13721 /* set_die_type should be already done. */
13722 set_descriptive_type (type
, die
, cu
);
13724 do_cleanups (back_to
);
13729 static enum dwarf_array_dim_ordering
13730 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
13732 struct attribute
*attr
;
13734 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
13736 if (attr
) return DW_SND (attr
);
13738 /* GNU F77 is a special case, as at 08/2004 array type info is the
13739 opposite order to the dwarf2 specification, but data is still
13740 laid out as per normal fortran.
13742 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
13743 version checking. */
13745 if (cu
->language
== language_fortran
13746 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
13748 return DW_ORD_row_major
;
13751 switch (cu
->language_defn
->la_array_ordering
)
13753 case array_column_major
:
13754 return DW_ORD_col_major
;
13755 case array_row_major
:
13757 return DW_ORD_row_major
;
13761 /* Extract all information from a DW_TAG_set_type DIE and put it in
13762 the DIE's type field. */
13764 static struct type
*
13765 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13767 struct type
*domain_type
, *set_type
;
13768 struct attribute
*attr
;
13770 domain_type
= die_type (die
, cu
);
13772 /* The die_type call above may have already set the type for this DIE. */
13773 set_type
= get_die_type (die
, cu
);
13777 set_type
= create_set_type (NULL
, domain_type
);
13779 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13781 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
13783 return set_die_type (die
, set_type
, cu
);
13786 /* A helper for read_common_block that creates a locexpr baton.
13787 SYM is the symbol which we are marking as computed.
13788 COMMON_DIE is the DIE for the common block.
13789 COMMON_LOC is the location expression attribute for the common
13791 MEMBER_LOC is the location expression attribute for the particular
13792 member of the common block that we are processing.
13793 CU is the CU from which the above come. */
13796 mark_common_block_symbol_computed (struct symbol
*sym
,
13797 struct die_info
*common_die
,
13798 struct attribute
*common_loc
,
13799 struct attribute
*member_loc
,
13800 struct dwarf2_cu
*cu
)
13802 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13803 struct dwarf2_locexpr_baton
*baton
;
13805 unsigned int cu_off
;
13806 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
13807 LONGEST offset
= 0;
13809 gdb_assert (common_loc
&& member_loc
);
13810 gdb_assert (attr_form_is_block (common_loc
));
13811 gdb_assert (attr_form_is_block (member_loc
)
13812 || attr_form_is_constant (member_loc
));
13814 baton
= obstack_alloc (&objfile
->objfile_obstack
,
13815 sizeof (struct dwarf2_locexpr_baton
));
13816 baton
->per_cu
= cu
->per_cu
;
13817 gdb_assert (baton
->per_cu
);
13819 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
13821 if (attr_form_is_constant (member_loc
))
13823 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
13824 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
13827 baton
->size
+= DW_BLOCK (member_loc
)->size
;
13829 ptr
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
13832 *ptr
++ = DW_OP_call4
;
13833 cu_off
= common_die
->offset
.sect_off
- cu
->per_cu
->offset
.sect_off
;
13834 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
13837 if (attr_form_is_constant (member_loc
))
13839 *ptr
++ = DW_OP_addr
;
13840 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
13841 ptr
+= cu
->header
.addr_size
;
13845 /* We have to copy the data here, because DW_OP_call4 will only
13846 use a DW_AT_location attribute. */
13847 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
13848 ptr
+= DW_BLOCK (member_loc
)->size
;
13851 *ptr
++ = DW_OP_plus
;
13852 gdb_assert (ptr
- baton
->data
== baton
->size
);
13854 SYMBOL_LOCATION_BATON (sym
) = baton
;
13855 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
13858 /* Create appropriate locally-scoped variables for all the
13859 DW_TAG_common_block entries. Also create a struct common_block
13860 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
13861 is used to sepate the common blocks name namespace from regular
13865 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
13867 struct attribute
*attr
;
13869 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
13872 /* Support the .debug_loc offsets. */
13873 if (attr_form_is_block (attr
))
13877 else if (attr_form_is_section_offset (attr
))
13879 dwarf2_complex_location_expr_complaint ();
13884 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
13885 "common block member");
13890 if (die
->child
!= NULL
)
13892 struct objfile
*objfile
= cu
->objfile
;
13893 struct die_info
*child_die
;
13894 size_t n_entries
= 0, size
;
13895 struct common_block
*common_block
;
13896 struct symbol
*sym
;
13898 for (child_die
= die
->child
;
13899 child_die
&& child_die
->tag
;
13900 child_die
= sibling_die (child_die
))
13903 size
= (sizeof (struct common_block
)
13904 + (n_entries
- 1) * sizeof (struct symbol
*));
13905 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
13906 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
13907 common_block
->n_entries
= 0;
13909 for (child_die
= die
->child
;
13910 child_die
&& child_die
->tag
;
13911 child_die
= sibling_die (child_die
))
13913 /* Create the symbol in the DW_TAG_common_block block in the current
13915 sym
= new_symbol (child_die
, NULL
, cu
);
13918 struct attribute
*member_loc
;
13920 common_block
->contents
[common_block
->n_entries
++] = sym
;
13922 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
13926 /* GDB has handled this for a long time, but it is
13927 not specified by DWARF. It seems to have been
13928 emitted by gfortran at least as recently as:
13929 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
13930 complaint (&symfile_complaints
,
13931 _("Variable in common block has "
13932 "DW_AT_data_member_location "
13933 "- DIE at 0x%x [in module %s]"),
13934 child_die
->offset
.sect_off
,
13935 objfile_name (cu
->objfile
));
13937 if (attr_form_is_section_offset (member_loc
))
13938 dwarf2_complex_location_expr_complaint ();
13939 else if (attr_form_is_constant (member_loc
)
13940 || attr_form_is_block (member_loc
))
13943 mark_common_block_symbol_computed (sym
, die
, attr
,
13947 dwarf2_complex_location_expr_complaint ();
13952 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
13953 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
13957 /* Create a type for a C++ namespace. */
13959 static struct type
*
13960 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13962 struct objfile
*objfile
= cu
->objfile
;
13963 const char *previous_prefix
, *name
;
13967 /* For extensions, reuse the type of the original namespace. */
13968 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
13970 struct die_info
*ext_die
;
13971 struct dwarf2_cu
*ext_cu
= cu
;
13973 ext_die
= dwarf2_extension (die
, &ext_cu
);
13974 type
= read_type_die (ext_die
, ext_cu
);
13976 /* EXT_CU may not be the same as CU.
13977 Ensure TYPE is recorded with CU in die_type_hash. */
13978 return set_die_type (die
, type
, cu
);
13981 name
= namespace_name (die
, &is_anonymous
, cu
);
13983 /* Now build the name of the current namespace. */
13985 previous_prefix
= determine_prefix (die
, cu
);
13986 if (previous_prefix
[0] != '\0')
13987 name
= typename_concat (&objfile
->objfile_obstack
,
13988 previous_prefix
, name
, 0, cu
);
13990 /* Create the type. */
13991 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
13993 TYPE_NAME (type
) = name
;
13994 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
13996 return set_die_type (die
, type
, cu
);
13999 /* Read a C++ namespace. */
14002 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14004 struct objfile
*objfile
= cu
->objfile
;
14007 /* Add a symbol associated to this if we haven't seen the namespace
14008 before. Also, add a using directive if it's an anonymous
14011 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14015 type
= read_type_die (die
, cu
);
14016 new_symbol (die
, type
, cu
);
14018 namespace_name (die
, &is_anonymous
, cu
);
14021 const char *previous_prefix
= determine_prefix (die
, cu
);
14023 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
14024 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14028 if (die
->child
!= NULL
)
14030 struct die_info
*child_die
= die
->child
;
14032 while (child_die
&& child_die
->tag
)
14034 process_die (child_die
, cu
);
14035 child_die
= sibling_die (child_die
);
14040 /* Read a Fortran module as type. This DIE can be only a declaration used for
14041 imported module. Still we need that type as local Fortran "use ... only"
14042 declaration imports depend on the created type in determine_prefix. */
14044 static struct type
*
14045 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14047 struct objfile
*objfile
= cu
->objfile
;
14048 const char *module_name
;
14051 module_name
= dwarf2_name (die
, cu
);
14053 complaint (&symfile_complaints
,
14054 _("DW_TAG_module has no name, offset 0x%x"),
14055 die
->offset
.sect_off
);
14056 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
14058 /* determine_prefix uses TYPE_TAG_NAME. */
14059 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14061 return set_die_type (die
, type
, cu
);
14064 /* Read a Fortran module. */
14067 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14069 struct die_info
*child_die
= die
->child
;
14072 type
= read_type_die (die
, cu
);
14073 new_symbol (die
, type
, cu
);
14075 while (child_die
&& child_die
->tag
)
14077 process_die (child_die
, cu
);
14078 child_die
= sibling_die (child_die
);
14082 /* Return the name of the namespace represented by DIE. Set
14083 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14086 static const char *
14087 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14089 struct die_info
*current_die
;
14090 const char *name
= NULL
;
14092 /* Loop through the extensions until we find a name. */
14094 for (current_die
= die
;
14095 current_die
!= NULL
;
14096 current_die
= dwarf2_extension (die
, &cu
))
14098 name
= dwarf2_name (current_die
, cu
);
14103 /* Is it an anonymous namespace? */
14105 *is_anonymous
= (name
== NULL
);
14107 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14112 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14113 the user defined type vector. */
14115 static struct type
*
14116 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14118 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14119 struct comp_unit_head
*cu_header
= &cu
->header
;
14121 struct attribute
*attr_byte_size
;
14122 struct attribute
*attr_address_class
;
14123 int byte_size
, addr_class
;
14124 struct type
*target_type
;
14126 target_type
= die_type (die
, cu
);
14128 /* The die_type call above may have already set the type for this DIE. */
14129 type
= get_die_type (die
, cu
);
14133 type
= lookup_pointer_type (target_type
);
14135 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14136 if (attr_byte_size
)
14137 byte_size
= DW_UNSND (attr_byte_size
);
14139 byte_size
= cu_header
->addr_size
;
14141 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14142 if (attr_address_class
)
14143 addr_class
= DW_UNSND (attr_address_class
);
14145 addr_class
= DW_ADDR_none
;
14147 /* If the pointer size or address class is different than the
14148 default, create a type variant marked as such and set the
14149 length accordingly. */
14150 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14152 if (gdbarch_address_class_type_flags_p (gdbarch
))
14156 type_flags
= gdbarch_address_class_type_flags
14157 (gdbarch
, byte_size
, addr_class
);
14158 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14160 type
= make_type_with_address_space (type
, type_flags
);
14162 else if (TYPE_LENGTH (type
) != byte_size
)
14164 complaint (&symfile_complaints
,
14165 _("invalid pointer size %d"), byte_size
);
14169 /* Should we also complain about unhandled address classes? */
14173 TYPE_LENGTH (type
) = byte_size
;
14174 return set_die_type (die
, type
, cu
);
14177 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14178 the user defined type vector. */
14180 static struct type
*
14181 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14184 struct type
*to_type
;
14185 struct type
*domain
;
14187 to_type
= die_type (die
, cu
);
14188 domain
= die_containing_type (die
, cu
);
14190 /* The calls above may have already set the type for this DIE. */
14191 type
= get_die_type (die
, cu
);
14195 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14196 type
= lookup_methodptr_type (to_type
);
14197 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14199 struct type
*new_type
= alloc_type (cu
->objfile
);
14201 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14202 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14203 TYPE_VARARGS (to_type
));
14204 type
= lookup_methodptr_type (new_type
);
14207 type
= lookup_memberptr_type (to_type
, domain
);
14209 return set_die_type (die
, type
, cu
);
14212 /* Extract all information from a DW_TAG_reference_type DIE and add to
14213 the user defined type vector. */
14215 static struct type
*
14216 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14218 struct comp_unit_head
*cu_header
= &cu
->header
;
14219 struct type
*type
, *target_type
;
14220 struct attribute
*attr
;
14222 target_type
= die_type (die
, cu
);
14224 /* The die_type call above may have already set the type for this DIE. */
14225 type
= get_die_type (die
, cu
);
14229 type
= lookup_reference_type (target_type
);
14230 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14233 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14237 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14239 return set_die_type (die
, type
, cu
);
14242 /* Add the given cv-qualifiers to the element type of the array. GCC
14243 outputs DWARF type qualifiers that apply to an array, not the
14244 element type. But GDB relies on the array element type to carry
14245 the cv-qualifiers. This mimics section 6.7.3 of the C99
14248 static struct type
*
14249 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14250 struct type
*base_type
, int cnst
, int voltl
)
14252 struct type
*el_type
, *inner_array
;
14254 base_type
= copy_type (base_type
);
14255 inner_array
= base_type
;
14257 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14259 TYPE_TARGET_TYPE (inner_array
) =
14260 copy_type (TYPE_TARGET_TYPE (inner_array
));
14261 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14264 el_type
= TYPE_TARGET_TYPE (inner_array
);
14265 cnst
|= TYPE_CONST (el_type
);
14266 voltl
|= TYPE_VOLATILE (el_type
);
14267 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14269 return set_die_type (die
, base_type
, cu
);
14272 static struct type
*
14273 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14275 struct type
*base_type
, *cv_type
;
14277 base_type
= die_type (die
, cu
);
14279 /* The die_type call above may have already set the type for this DIE. */
14280 cv_type
= get_die_type (die
, cu
);
14284 /* In case the const qualifier is applied to an array type, the element type
14285 is so qualified, not the array type (section 6.7.3 of C99). */
14286 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14287 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14289 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14290 return set_die_type (die
, cv_type
, cu
);
14293 static struct type
*
14294 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14296 struct type
*base_type
, *cv_type
;
14298 base_type
= die_type (die
, cu
);
14300 /* The die_type call above may have already set the type for this DIE. */
14301 cv_type
= get_die_type (die
, cu
);
14305 /* In case the volatile qualifier is applied to an array type, the
14306 element type is so qualified, not the array type (section 6.7.3
14308 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14309 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14311 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14312 return set_die_type (die
, cv_type
, cu
);
14315 /* Handle DW_TAG_restrict_type. */
14317 static struct type
*
14318 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14320 struct type
*base_type
, *cv_type
;
14322 base_type
= die_type (die
, cu
);
14324 /* The die_type call above may have already set the type for this DIE. */
14325 cv_type
= get_die_type (die
, cu
);
14329 cv_type
= make_restrict_type (base_type
);
14330 return set_die_type (die
, cv_type
, cu
);
14333 /* Extract all information from a DW_TAG_string_type DIE and add to
14334 the user defined type vector. It isn't really a user defined type,
14335 but it behaves like one, with other DIE's using an AT_user_def_type
14336 attribute to reference it. */
14338 static struct type
*
14339 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14341 struct objfile
*objfile
= cu
->objfile
;
14342 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14343 struct type
*type
, *range_type
, *index_type
, *char_type
;
14344 struct attribute
*attr
;
14345 unsigned int length
;
14347 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14350 length
= DW_UNSND (attr
);
14354 /* Check for the DW_AT_byte_size attribute. */
14355 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14358 length
= DW_UNSND (attr
);
14366 index_type
= objfile_type (objfile
)->builtin_int
;
14367 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14368 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14369 type
= create_string_type (NULL
, char_type
, range_type
);
14371 return set_die_type (die
, type
, cu
);
14374 /* Assuming that DIE corresponds to a function, returns nonzero
14375 if the function is prototyped. */
14378 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
14380 struct attribute
*attr
;
14382 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
14383 if (attr
&& (DW_UNSND (attr
) != 0))
14386 /* The DWARF standard implies that the DW_AT_prototyped attribute
14387 is only meaninful for C, but the concept also extends to other
14388 languages that allow unprototyped functions (Eg: Objective C).
14389 For all other languages, assume that functions are always
14391 if (cu
->language
!= language_c
14392 && cu
->language
!= language_objc
14393 && cu
->language
!= language_opencl
)
14396 /* RealView does not emit DW_AT_prototyped. We can not distinguish
14397 prototyped and unprototyped functions; default to prototyped,
14398 since that is more common in modern code (and RealView warns
14399 about unprototyped functions). */
14400 if (producer_is_realview (cu
->producer
))
14406 /* Handle DIES due to C code like:
14410 int (*funcp)(int a, long l);
14414 ('funcp' generates a DW_TAG_subroutine_type DIE). */
14416 static struct type
*
14417 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14419 struct objfile
*objfile
= cu
->objfile
;
14420 struct type
*type
; /* Type that this function returns. */
14421 struct type
*ftype
; /* Function that returns above type. */
14422 struct attribute
*attr
;
14424 type
= die_type (die
, cu
);
14426 /* The die_type call above may have already set the type for this DIE. */
14427 ftype
= get_die_type (die
, cu
);
14431 ftype
= lookup_function_type (type
);
14433 if (prototyped_function_p (die
, cu
))
14434 TYPE_PROTOTYPED (ftype
) = 1;
14436 /* Store the calling convention in the type if it's available in
14437 the subroutine die. Otherwise set the calling convention to
14438 the default value DW_CC_normal. */
14439 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
14441 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
14442 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
14443 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
14445 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
14447 /* Record whether the function returns normally to its caller or not
14448 if the DWARF producer set that information. */
14449 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
14450 if (attr
&& (DW_UNSND (attr
) != 0))
14451 TYPE_NO_RETURN (ftype
) = 1;
14453 /* We need to add the subroutine type to the die immediately so
14454 we don't infinitely recurse when dealing with parameters
14455 declared as the same subroutine type. */
14456 set_die_type (die
, ftype
, cu
);
14458 if (die
->child
!= NULL
)
14460 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
14461 struct die_info
*child_die
;
14462 int nparams
, iparams
;
14464 /* Count the number of parameters.
14465 FIXME: GDB currently ignores vararg functions, but knows about
14466 vararg member functions. */
14468 child_die
= die
->child
;
14469 while (child_die
&& child_die
->tag
)
14471 if (child_die
->tag
== DW_TAG_formal_parameter
)
14473 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
14474 TYPE_VARARGS (ftype
) = 1;
14475 child_die
= sibling_die (child_die
);
14478 /* Allocate storage for parameters and fill them in. */
14479 TYPE_NFIELDS (ftype
) = nparams
;
14480 TYPE_FIELDS (ftype
) = (struct field
*)
14481 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
14483 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
14484 even if we error out during the parameters reading below. */
14485 for (iparams
= 0; iparams
< nparams
; iparams
++)
14486 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
14489 child_die
= die
->child
;
14490 while (child_die
&& child_die
->tag
)
14492 if (child_die
->tag
== DW_TAG_formal_parameter
)
14494 struct type
*arg_type
;
14496 /* DWARF version 2 has no clean way to discern C++
14497 static and non-static member functions. G++ helps
14498 GDB by marking the first parameter for non-static
14499 member functions (which is the this pointer) as
14500 artificial. We pass this information to
14501 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
14503 DWARF version 3 added DW_AT_object_pointer, which GCC
14504 4.5 does not yet generate. */
14505 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
14507 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
14510 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
14512 /* GCC/43521: In java, the formal parameter
14513 "this" is sometimes not marked with DW_AT_artificial. */
14514 if (cu
->language
== language_java
)
14516 const char *name
= dwarf2_name (child_die
, cu
);
14518 if (name
&& !strcmp (name
, "this"))
14519 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
14522 arg_type
= die_type (child_die
, cu
);
14524 /* RealView does not mark THIS as const, which the testsuite
14525 expects. GCC marks THIS as const in method definitions,
14526 but not in the class specifications (GCC PR 43053). */
14527 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
14528 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
14531 struct dwarf2_cu
*arg_cu
= cu
;
14532 const char *name
= dwarf2_name (child_die
, cu
);
14534 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
14537 /* If the compiler emits this, use it. */
14538 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
14541 else if (name
&& strcmp (name
, "this") == 0)
14542 /* Function definitions will have the argument names. */
14544 else if (name
== NULL
&& iparams
== 0)
14545 /* Declarations may not have the names, so like
14546 elsewhere in GDB, assume an artificial first
14547 argument is "this". */
14551 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
14555 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
14558 child_die
= sibling_die (child_die
);
14565 static struct type
*
14566 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
14568 struct objfile
*objfile
= cu
->objfile
;
14569 const char *name
= NULL
;
14570 struct type
*this_type
, *target_type
;
14572 name
= dwarf2_full_name (NULL
, die
, cu
);
14573 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
14574 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
14575 TYPE_NAME (this_type
) = name
;
14576 set_die_type (die
, this_type
, cu
);
14577 target_type
= die_type (die
, cu
);
14578 if (target_type
!= this_type
)
14579 TYPE_TARGET_TYPE (this_type
) = target_type
;
14582 /* Self-referential typedefs are, it seems, not allowed by the DWARF
14583 spec and cause infinite loops in GDB. */
14584 complaint (&symfile_complaints
,
14585 _("Self-referential DW_TAG_typedef "
14586 "- DIE at 0x%x [in module %s]"),
14587 die
->offset
.sect_off
, objfile_name (objfile
));
14588 TYPE_TARGET_TYPE (this_type
) = NULL
;
14593 /* Find a representation of a given base type and install
14594 it in the TYPE field of the die. */
14596 static struct type
*
14597 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14599 struct objfile
*objfile
= cu
->objfile
;
14601 struct attribute
*attr
;
14602 int encoding
= 0, size
= 0;
14604 enum type_code code
= TYPE_CODE_INT
;
14605 int type_flags
= 0;
14606 struct type
*target_type
= NULL
;
14608 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
14611 encoding
= DW_UNSND (attr
);
14613 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14616 size
= DW_UNSND (attr
);
14618 name
= dwarf2_name (die
, cu
);
14621 complaint (&symfile_complaints
,
14622 _("DW_AT_name missing from DW_TAG_base_type"));
14627 case DW_ATE_address
:
14628 /* Turn DW_ATE_address into a void * pointer. */
14629 code
= TYPE_CODE_PTR
;
14630 type_flags
|= TYPE_FLAG_UNSIGNED
;
14631 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
14633 case DW_ATE_boolean
:
14634 code
= TYPE_CODE_BOOL
;
14635 type_flags
|= TYPE_FLAG_UNSIGNED
;
14637 case DW_ATE_complex_float
:
14638 code
= TYPE_CODE_COMPLEX
;
14639 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
14641 case DW_ATE_decimal_float
:
14642 code
= TYPE_CODE_DECFLOAT
;
14645 code
= TYPE_CODE_FLT
;
14647 case DW_ATE_signed
:
14649 case DW_ATE_unsigned
:
14650 type_flags
|= TYPE_FLAG_UNSIGNED
;
14651 if (cu
->language
== language_fortran
14653 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
14654 code
= TYPE_CODE_CHAR
;
14656 case DW_ATE_signed_char
:
14657 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14658 || cu
->language
== language_pascal
14659 || cu
->language
== language_fortran
)
14660 code
= TYPE_CODE_CHAR
;
14662 case DW_ATE_unsigned_char
:
14663 if (cu
->language
== language_ada
|| cu
->language
== language_m2
14664 || cu
->language
== language_pascal
14665 || cu
->language
== language_fortran
)
14666 code
= TYPE_CODE_CHAR
;
14667 type_flags
|= TYPE_FLAG_UNSIGNED
;
14670 /* We just treat this as an integer and then recognize the
14671 type by name elsewhere. */
14675 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
14676 dwarf_type_encoding_name (encoding
));
14680 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
14681 TYPE_NAME (type
) = name
;
14682 TYPE_TARGET_TYPE (type
) = target_type
;
14684 if (name
&& strcmp (name
, "char") == 0)
14685 TYPE_NOSIGN (type
) = 1;
14687 return set_die_type (die
, type
, cu
);
14690 /* Parse dwarf attribute if it's a block, reference or constant and put the
14691 resulting value of the attribute into struct bound_prop.
14692 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
14695 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
14696 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
14698 struct dwarf2_property_baton
*baton
;
14699 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
14701 if (attr
== NULL
|| prop
== NULL
)
14704 if (attr_form_is_block (attr
))
14706 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14707 baton
->referenced_type
= NULL
;
14708 baton
->locexpr
.per_cu
= cu
->per_cu
;
14709 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
14710 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
14711 prop
->data
.baton
= baton
;
14712 prop
->kind
= PROP_LOCEXPR
;
14713 gdb_assert (prop
->data
.baton
!= NULL
);
14715 else if (attr_form_is_ref (attr
))
14717 struct dwarf2_cu
*target_cu
= cu
;
14718 struct die_info
*target_die
;
14719 struct attribute
*target_attr
;
14721 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14722 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
14723 if (target_attr
== NULL
)
14724 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
14726 if (target_attr
== NULL
)
14729 switch (target_attr
->name
)
14731 case DW_AT_location
:
14732 if (attr_form_is_section_offset (target_attr
))
14734 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14735 baton
->referenced_type
= die_type (target_die
, target_cu
);
14736 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
14737 prop
->data
.baton
= baton
;
14738 prop
->kind
= PROP_LOCLIST
;
14739 gdb_assert (prop
->data
.baton
!= NULL
);
14741 else if (attr_form_is_block (target_attr
))
14743 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14744 baton
->referenced_type
= die_type (target_die
, target_cu
);
14745 baton
->locexpr
.per_cu
= cu
->per_cu
;
14746 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
14747 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
14748 prop
->data
.baton
= baton
;
14749 prop
->kind
= PROP_LOCEXPR
;
14750 gdb_assert (prop
->data
.baton
!= NULL
);
14754 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14755 "dynamic property");
14759 case DW_AT_data_member_location
:
14763 if (!handle_data_member_location (target_die
, target_cu
,
14767 baton
= obstack_alloc (obstack
, sizeof (*baton
));
14768 baton
->referenced_type
= get_die_type (target_die
->parent
,
14770 baton
->offset_info
.offset
= offset
;
14771 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
14772 prop
->data
.baton
= baton
;
14773 prop
->kind
= PROP_ADDR_OFFSET
;
14778 else if (attr_form_is_constant (attr
))
14780 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
14781 prop
->kind
= PROP_CONST
;
14785 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
14786 dwarf2_name (die
, cu
));
14793 /* Read the given DW_AT_subrange DIE. */
14795 static struct type
*
14796 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14798 struct type
*base_type
, *orig_base_type
;
14799 struct type
*range_type
;
14800 struct attribute
*attr
;
14801 struct dynamic_prop low
, high
;
14802 int low_default_is_valid
;
14803 int high_bound_is_count
= 0;
14805 LONGEST negative_mask
;
14807 orig_base_type
= die_type (die
, cu
);
14808 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
14809 whereas the real type might be. So, we use ORIG_BASE_TYPE when
14810 creating the range type, but we use the result of check_typedef
14811 when examining properties of the type. */
14812 base_type
= check_typedef (orig_base_type
);
14814 /* The die_type call above may have already set the type for this DIE. */
14815 range_type
= get_die_type (die
, cu
);
14819 low
.kind
= PROP_CONST
;
14820 high
.kind
= PROP_CONST
;
14821 high
.data
.const_val
= 0;
14823 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
14824 omitting DW_AT_lower_bound. */
14825 switch (cu
->language
)
14828 case language_cplus
:
14829 low
.data
.const_val
= 0;
14830 low_default_is_valid
= 1;
14832 case language_fortran
:
14833 low
.data
.const_val
= 1;
14834 low_default_is_valid
= 1;
14837 case language_java
:
14838 case language_objc
:
14839 low
.data
.const_val
= 0;
14840 low_default_is_valid
= (cu
->header
.version
>= 4);
14844 case language_pascal
:
14845 low
.data
.const_val
= 1;
14846 low_default_is_valid
= (cu
->header
.version
>= 4);
14849 low
.data
.const_val
= 0;
14850 low_default_is_valid
= 0;
14854 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
14856 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
14857 else if (!low_default_is_valid
)
14858 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
14859 "- DIE at 0x%x [in module %s]"),
14860 die
->offset
.sect_off
, objfile_name (cu
->objfile
));
14862 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
14863 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14865 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
14866 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
14868 /* If bounds are constant do the final calculation here. */
14869 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
14870 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
14872 high_bound_is_count
= 1;
14876 /* Dwarf-2 specifications explicitly allows to create subrange types
14877 without specifying a base type.
14878 In that case, the base type must be set to the type of
14879 the lower bound, upper bound or count, in that order, if any of these
14880 three attributes references an object that has a type.
14881 If no base type is found, the Dwarf-2 specifications say that
14882 a signed integer type of size equal to the size of an address should
14884 For the following C code: `extern char gdb_int [];'
14885 GCC produces an empty range DIE.
14886 FIXME: muller/2010-05-28: Possible references to object for low bound,
14887 high bound or count are not yet handled by this code. */
14888 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
14890 struct objfile
*objfile
= cu
->objfile
;
14891 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14892 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
14893 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
14895 /* Test "int", "long int", and "long long int" objfile types,
14896 and select the first one having a size above or equal to the
14897 architecture address size. */
14898 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14899 base_type
= int_type
;
14902 int_type
= objfile_type (objfile
)->builtin_long
;
14903 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14904 base_type
= int_type
;
14907 int_type
= objfile_type (objfile
)->builtin_long_long
;
14908 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
14909 base_type
= int_type
;
14914 /* Normally, the DWARF producers are expected to use a signed
14915 constant form (Eg. DW_FORM_sdata) to express negative bounds.
14916 But this is unfortunately not always the case, as witnessed
14917 with GCC, for instance, where the ambiguous DW_FORM_dataN form
14918 is used instead. To work around that ambiguity, we treat
14919 the bounds as signed, and thus sign-extend their values, when
14920 the base type is signed. */
14922 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
14923 if (low
.kind
== PROP_CONST
14924 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
14925 low
.data
.const_val
|= negative_mask
;
14926 if (high
.kind
== PROP_CONST
14927 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
14928 high
.data
.const_val
|= negative_mask
;
14930 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
14932 if (high_bound_is_count
)
14933 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
14935 /* Ada expects an empty array on no boundary attributes. */
14936 if (attr
== NULL
&& cu
->language
!= language_ada
)
14937 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
14939 name
= dwarf2_name (die
, cu
);
14941 TYPE_NAME (range_type
) = name
;
14943 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14945 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
14947 set_die_type (die
, range_type
, cu
);
14949 /* set_die_type should be already done. */
14950 set_descriptive_type (range_type
, die
, cu
);
14955 static struct type
*
14956 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14960 /* For now, we only support the C meaning of an unspecified type: void. */
14962 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
14963 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
14965 return set_die_type (die
, type
, cu
);
14968 /* Read a single die and all its descendents. Set the die's sibling
14969 field to NULL; set other fields in the die correctly, and set all
14970 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
14971 location of the info_ptr after reading all of those dies. PARENT
14972 is the parent of the die in question. */
14974 static struct die_info
*
14975 read_die_and_children (const struct die_reader_specs
*reader
,
14976 const gdb_byte
*info_ptr
,
14977 const gdb_byte
**new_info_ptr
,
14978 struct die_info
*parent
)
14980 struct die_info
*die
;
14981 const gdb_byte
*cur_ptr
;
14984 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
14987 *new_info_ptr
= cur_ptr
;
14990 store_in_ref_table (die
, reader
->cu
);
14993 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
14997 *new_info_ptr
= cur_ptr
;
15000 die
->sibling
= NULL
;
15001 die
->parent
= parent
;
15005 /* Read a die, all of its descendents, and all of its siblings; set
15006 all of the fields of all of the dies correctly. Arguments are as
15007 in read_die_and_children. */
15009 static struct die_info
*
15010 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15011 const gdb_byte
*info_ptr
,
15012 const gdb_byte
**new_info_ptr
,
15013 struct die_info
*parent
)
15015 struct die_info
*first_die
, *last_sibling
;
15016 const gdb_byte
*cur_ptr
;
15018 cur_ptr
= info_ptr
;
15019 first_die
= last_sibling
= NULL
;
15023 struct die_info
*die
15024 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15028 *new_info_ptr
= cur_ptr
;
15035 last_sibling
->sibling
= die
;
15037 last_sibling
= die
;
15041 /* Read a die, all of its descendents, and all of its siblings; set
15042 all of the fields of all of the dies correctly. Arguments are as
15043 in read_die_and_children.
15044 This the main entry point for reading a DIE and all its children. */
15046 static struct die_info
*
15047 read_die_and_siblings (const struct die_reader_specs
*reader
,
15048 const gdb_byte
*info_ptr
,
15049 const gdb_byte
**new_info_ptr
,
15050 struct die_info
*parent
)
15052 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15053 new_info_ptr
, parent
);
15055 if (dwarf2_die_debug
)
15057 fprintf_unfiltered (gdb_stdlog
,
15058 "Read die from %s@0x%x of %s:\n",
15059 get_section_name (reader
->die_section
),
15060 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15061 bfd_get_filename (reader
->abfd
));
15062 dump_die (die
, dwarf2_die_debug
);
15068 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15070 The caller is responsible for filling in the extra attributes
15071 and updating (*DIEP)->num_attrs.
15072 Set DIEP to point to a newly allocated die with its information,
15073 except for its child, sibling, and parent fields.
15074 Set HAS_CHILDREN to tell whether the die has children or not. */
15076 static const gdb_byte
*
15077 read_full_die_1 (const struct die_reader_specs
*reader
,
15078 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15079 int *has_children
, int num_extra_attrs
)
15081 unsigned int abbrev_number
, bytes_read
, i
;
15082 sect_offset offset
;
15083 struct abbrev_info
*abbrev
;
15084 struct die_info
*die
;
15085 struct dwarf2_cu
*cu
= reader
->cu
;
15086 bfd
*abfd
= reader
->abfd
;
15088 offset
.sect_off
= info_ptr
- reader
->buffer
;
15089 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15090 info_ptr
+= bytes_read
;
15091 if (!abbrev_number
)
15098 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15100 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15102 bfd_get_filename (abfd
));
15104 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15105 die
->offset
= offset
;
15106 die
->tag
= abbrev
->tag
;
15107 die
->abbrev
= abbrev_number
;
15109 /* Make the result usable.
15110 The caller needs to update num_attrs after adding the extra
15112 die
->num_attrs
= abbrev
->num_attrs
;
15114 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15115 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15119 *has_children
= abbrev
->has_children
;
15123 /* Read a die and all its attributes.
15124 Set DIEP to point to a newly allocated die with its information,
15125 except for its child, sibling, and parent fields.
15126 Set HAS_CHILDREN to tell whether the die has children or not. */
15128 static const gdb_byte
*
15129 read_full_die (const struct die_reader_specs
*reader
,
15130 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15133 const gdb_byte
*result
;
15135 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15137 if (dwarf2_die_debug
)
15139 fprintf_unfiltered (gdb_stdlog
,
15140 "Read die from %s@0x%x of %s:\n",
15141 get_section_name (reader
->die_section
),
15142 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15143 bfd_get_filename (reader
->abfd
));
15144 dump_die (*diep
, dwarf2_die_debug
);
15150 /* Abbreviation tables.
15152 In DWARF version 2, the description of the debugging information is
15153 stored in a separate .debug_abbrev section. Before we read any
15154 dies from a section we read in all abbreviations and install them
15155 in a hash table. */
15157 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15159 static struct abbrev_info
*
15160 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15162 struct abbrev_info
*abbrev
;
15164 abbrev
= (struct abbrev_info
*)
15165 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
15166 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15170 /* Add an abbreviation to the table. */
15173 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15174 unsigned int abbrev_number
,
15175 struct abbrev_info
*abbrev
)
15177 unsigned int hash_number
;
15179 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15180 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15181 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15184 /* Look up an abbrev in the table.
15185 Returns NULL if the abbrev is not found. */
15187 static struct abbrev_info
*
15188 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15189 unsigned int abbrev_number
)
15191 unsigned int hash_number
;
15192 struct abbrev_info
*abbrev
;
15194 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15195 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15199 if (abbrev
->number
== abbrev_number
)
15201 abbrev
= abbrev
->next
;
15206 /* Read in an abbrev table. */
15208 static struct abbrev_table
*
15209 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15210 sect_offset offset
)
15212 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15213 bfd
*abfd
= get_section_bfd_owner (section
);
15214 struct abbrev_table
*abbrev_table
;
15215 const gdb_byte
*abbrev_ptr
;
15216 struct abbrev_info
*cur_abbrev
;
15217 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15218 unsigned int abbrev_form
;
15219 struct attr_abbrev
*cur_attrs
;
15220 unsigned int allocated_attrs
;
15222 abbrev_table
= XNEW (struct abbrev_table
);
15223 abbrev_table
->offset
= offset
;
15224 obstack_init (&abbrev_table
->abbrev_obstack
);
15225 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15227 * sizeof (struct abbrev_info
*)));
15228 memset (abbrev_table
->abbrevs
, 0,
15229 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15231 dwarf2_read_section (objfile
, section
);
15232 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
15233 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15234 abbrev_ptr
+= bytes_read
;
15236 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15237 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
15239 /* Loop until we reach an abbrev number of 0. */
15240 while (abbrev_number
)
15242 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15244 /* read in abbrev header */
15245 cur_abbrev
->number
= abbrev_number
;
15246 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15247 abbrev_ptr
+= bytes_read
;
15248 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15251 /* now read in declarations */
15252 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15253 abbrev_ptr
+= bytes_read
;
15254 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15255 abbrev_ptr
+= bytes_read
;
15256 while (abbrev_name
)
15258 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15260 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15262 = xrealloc (cur_attrs
, (allocated_attrs
15263 * sizeof (struct attr_abbrev
)));
15266 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
15267 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
15268 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15269 abbrev_ptr
+= bytes_read
;
15270 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15271 abbrev_ptr
+= bytes_read
;
15274 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
15275 (cur_abbrev
->num_attrs
15276 * sizeof (struct attr_abbrev
)));
15277 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15278 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15280 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15282 /* Get next abbreviation.
15283 Under Irix6 the abbreviations for a compilation unit are not
15284 always properly terminated with an abbrev number of 0.
15285 Exit loop if we encounter an abbreviation which we have
15286 already read (which means we are about to read the abbreviations
15287 for the next compile unit) or if the end of the abbreviation
15288 table is reached. */
15289 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15291 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15292 abbrev_ptr
+= bytes_read
;
15293 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15298 return abbrev_table
;
15301 /* Free the resources held by ABBREV_TABLE. */
15304 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15306 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15307 xfree (abbrev_table
);
15310 /* Same as abbrev_table_free but as a cleanup.
15311 We pass in a pointer to the pointer to the table so that we can
15312 set the pointer to NULL when we're done. It also simplifies
15313 build_type_psymtabs_1. */
15316 abbrev_table_free_cleanup (void *table_ptr
)
15318 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
15320 if (*abbrev_table_ptr
!= NULL
)
15321 abbrev_table_free (*abbrev_table_ptr
);
15322 *abbrev_table_ptr
= NULL
;
15325 /* Read the abbrev table for CU from ABBREV_SECTION. */
15328 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15329 struct dwarf2_section_info
*abbrev_section
)
15332 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
15335 /* Release the memory used by the abbrev table for a compilation unit. */
15338 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15340 struct dwarf2_cu
*cu
= ptr_to_cu
;
15342 if (cu
->abbrev_table
!= NULL
)
15343 abbrev_table_free (cu
->abbrev_table
);
15344 /* Set this to NULL so that we SEGV if we try to read it later,
15345 and also because free_comp_unit verifies this is NULL. */
15346 cu
->abbrev_table
= NULL
;
15349 /* Returns nonzero if TAG represents a type that we might generate a partial
15353 is_type_tag_for_partial (int tag
)
15358 /* Some types that would be reasonable to generate partial symbols for,
15359 that we don't at present. */
15360 case DW_TAG_array_type
:
15361 case DW_TAG_file_type
:
15362 case DW_TAG_ptr_to_member_type
:
15363 case DW_TAG_set_type
:
15364 case DW_TAG_string_type
:
15365 case DW_TAG_subroutine_type
:
15367 case DW_TAG_base_type
:
15368 case DW_TAG_class_type
:
15369 case DW_TAG_interface_type
:
15370 case DW_TAG_enumeration_type
:
15371 case DW_TAG_structure_type
:
15372 case DW_TAG_subrange_type
:
15373 case DW_TAG_typedef
:
15374 case DW_TAG_union_type
:
15381 /* Load all DIEs that are interesting for partial symbols into memory. */
15383 static struct partial_die_info
*
15384 load_partial_dies (const struct die_reader_specs
*reader
,
15385 const gdb_byte
*info_ptr
, int building_psymtab
)
15387 struct dwarf2_cu
*cu
= reader
->cu
;
15388 struct objfile
*objfile
= cu
->objfile
;
15389 struct partial_die_info
*part_die
;
15390 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
15391 struct abbrev_info
*abbrev
;
15392 unsigned int bytes_read
;
15393 unsigned int load_all
= 0;
15394 int nesting_level
= 1;
15399 gdb_assert (cu
->per_cu
!= NULL
);
15400 if (cu
->per_cu
->load_all_dies
)
15404 = htab_create_alloc_ex (cu
->header
.length
/ 12,
15408 &cu
->comp_unit_obstack
,
15409 hashtab_obstack_allocate
,
15410 dummy_obstack_deallocate
);
15412 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15413 sizeof (struct partial_die_info
));
15417 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
15419 /* A NULL abbrev means the end of a series of children. */
15420 if (abbrev
== NULL
)
15422 if (--nesting_level
== 0)
15424 /* PART_DIE was probably the last thing allocated on the
15425 comp_unit_obstack, so we could call obstack_free
15426 here. We don't do that because the waste is small,
15427 and will be cleaned up when we're done with this
15428 compilation unit. This way, we're also more robust
15429 against other users of the comp_unit_obstack. */
15432 info_ptr
+= bytes_read
;
15433 last_die
= parent_die
;
15434 parent_die
= parent_die
->die_parent
;
15438 /* Check for template arguments. We never save these; if
15439 they're seen, we just mark the parent, and go on our way. */
15440 if (parent_die
!= NULL
15441 && cu
->language
== language_cplus
15442 && (abbrev
->tag
== DW_TAG_template_type_param
15443 || abbrev
->tag
== DW_TAG_template_value_param
))
15445 parent_die
->has_template_arguments
= 1;
15449 /* We don't need a partial DIE for the template argument. */
15450 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15455 /* We only recurse into c++ subprograms looking for template arguments.
15456 Skip their other children. */
15458 && cu
->language
== language_cplus
15459 && parent_die
!= NULL
15460 && parent_die
->tag
== DW_TAG_subprogram
)
15462 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15466 /* Check whether this DIE is interesting enough to save. Normally
15467 we would not be interested in members here, but there may be
15468 later variables referencing them via DW_AT_specification (for
15469 static members). */
15471 && !is_type_tag_for_partial (abbrev
->tag
)
15472 && abbrev
->tag
!= DW_TAG_constant
15473 && abbrev
->tag
!= DW_TAG_enumerator
15474 && abbrev
->tag
!= DW_TAG_subprogram
15475 && abbrev
->tag
!= DW_TAG_lexical_block
15476 && abbrev
->tag
!= DW_TAG_variable
15477 && abbrev
->tag
!= DW_TAG_namespace
15478 && abbrev
->tag
!= DW_TAG_module
15479 && abbrev
->tag
!= DW_TAG_member
15480 && abbrev
->tag
!= DW_TAG_imported_unit
15481 && abbrev
->tag
!= DW_TAG_imported_declaration
)
15483 /* Otherwise we skip to the next sibling, if any. */
15484 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
15488 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
15491 /* This two-pass algorithm for processing partial symbols has a
15492 high cost in cache pressure. Thus, handle some simple cases
15493 here which cover the majority of C partial symbols. DIEs
15494 which neither have specification tags in them, nor could have
15495 specification tags elsewhere pointing at them, can simply be
15496 processed and discarded.
15498 This segment is also optional; scan_partial_symbols and
15499 add_partial_symbol will handle these DIEs if we chain
15500 them in normally. When compilers which do not emit large
15501 quantities of duplicate debug information are more common,
15502 this code can probably be removed. */
15504 /* Any complete simple types at the top level (pretty much all
15505 of them, for a language without namespaces), can be processed
15507 if (parent_die
== NULL
15508 && part_die
->has_specification
== 0
15509 && part_die
->is_declaration
== 0
15510 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
15511 || part_die
->tag
== DW_TAG_base_type
15512 || part_die
->tag
== DW_TAG_subrange_type
))
15514 if (building_psymtab
&& part_die
->name
!= NULL
)
15515 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15516 VAR_DOMAIN
, LOC_TYPEDEF
,
15517 &objfile
->static_psymbols
,
15518 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15519 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15523 /* The exception for DW_TAG_typedef with has_children above is
15524 a workaround of GCC PR debug/47510. In the case of this complaint
15525 type_name_no_tag_or_error will error on such types later.
15527 GDB skipped children of DW_TAG_typedef by the shortcut above and then
15528 it could not find the child DIEs referenced later, this is checked
15529 above. In correct DWARF DW_TAG_typedef should have no children. */
15531 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
15532 complaint (&symfile_complaints
,
15533 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
15534 "- DIE at 0x%x [in module %s]"),
15535 part_die
->offset
.sect_off
, objfile_name (objfile
));
15537 /* If we're at the second level, and we're an enumerator, and
15538 our parent has no specification (meaning possibly lives in a
15539 namespace elsewhere), then we can add the partial symbol now
15540 instead of queueing it. */
15541 if (part_die
->tag
== DW_TAG_enumerator
15542 && parent_die
!= NULL
15543 && parent_die
->die_parent
== NULL
15544 && parent_die
->tag
== DW_TAG_enumeration_type
15545 && parent_die
->has_specification
== 0)
15547 if (part_die
->name
== NULL
)
15548 complaint (&symfile_complaints
,
15549 _("malformed enumerator DIE ignored"));
15550 else if (building_psymtab
)
15551 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
15552 VAR_DOMAIN
, LOC_CONST
,
15553 (cu
->language
== language_cplus
15554 || cu
->language
== language_java
)
15555 ? &objfile
->global_psymbols
15556 : &objfile
->static_psymbols
,
15557 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
15559 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
15563 /* We'll save this DIE so link it in. */
15564 part_die
->die_parent
= parent_die
;
15565 part_die
->die_sibling
= NULL
;
15566 part_die
->die_child
= NULL
;
15568 if (last_die
&& last_die
== parent_die
)
15569 last_die
->die_child
= part_die
;
15571 last_die
->die_sibling
= part_die
;
15573 last_die
= part_die
;
15575 if (first_die
== NULL
)
15576 first_die
= part_die
;
15578 /* Maybe add the DIE to the hash table. Not all DIEs that we
15579 find interesting need to be in the hash table, because we
15580 also have the parent/sibling/child chains; only those that we
15581 might refer to by offset later during partial symbol reading.
15583 For now this means things that might have be the target of a
15584 DW_AT_specification, DW_AT_abstract_origin, or
15585 DW_AT_extension. DW_AT_extension will refer only to
15586 namespaces; DW_AT_abstract_origin refers to functions (and
15587 many things under the function DIE, but we do not recurse
15588 into function DIEs during partial symbol reading) and
15589 possibly variables as well; DW_AT_specification refers to
15590 declarations. Declarations ought to have the DW_AT_declaration
15591 flag. It happens that GCC forgets to put it in sometimes, but
15592 only for functions, not for types.
15594 Adding more things than necessary to the hash table is harmless
15595 except for the performance cost. Adding too few will result in
15596 wasted time in find_partial_die, when we reread the compilation
15597 unit with load_all_dies set. */
15600 || abbrev
->tag
== DW_TAG_constant
15601 || abbrev
->tag
== DW_TAG_subprogram
15602 || abbrev
->tag
== DW_TAG_variable
15603 || abbrev
->tag
== DW_TAG_namespace
15604 || part_die
->is_declaration
)
15608 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
15609 part_die
->offset
.sect_off
, INSERT
);
15613 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
15614 sizeof (struct partial_die_info
));
15616 /* For some DIEs we want to follow their children (if any). For C
15617 we have no reason to follow the children of structures; for other
15618 languages we have to, so that we can get at method physnames
15619 to infer fully qualified class names, for DW_AT_specification,
15620 and for C++ template arguments. For C++, we also look one level
15621 inside functions to find template arguments (if the name of the
15622 function does not already contain the template arguments).
15624 For Ada, we need to scan the children of subprograms and lexical
15625 blocks as well because Ada allows the definition of nested
15626 entities that could be interesting for the debugger, such as
15627 nested subprograms for instance. */
15628 if (last_die
->has_children
15630 || last_die
->tag
== DW_TAG_namespace
15631 || last_die
->tag
== DW_TAG_module
15632 || last_die
->tag
== DW_TAG_enumeration_type
15633 || (cu
->language
== language_cplus
15634 && last_die
->tag
== DW_TAG_subprogram
15635 && (last_die
->name
== NULL
15636 || strchr (last_die
->name
, '<') == NULL
))
15637 || (cu
->language
!= language_c
15638 && (last_die
->tag
== DW_TAG_class_type
15639 || last_die
->tag
== DW_TAG_interface_type
15640 || last_die
->tag
== DW_TAG_structure_type
15641 || last_die
->tag
== DW_TAG_union_type
))
15642 || (cu
->language
== language_ada
15643 && (last_die
->tag
== DW_TAG_subprogram
15644 || last_die
->tag
== DW_TAG_lexical_block
))))
15647 parent_die
= last_die
;
15651 /* Otherwise we skip to the next sibling, if any. */
15652 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
15654 /* Back to the top, do it again. */
15658 /* Read a minimal amount of information into the minimal die structure. */
15660 static const gdb_byte
*
15661 read_partial_die (const struct die_reader_specs
*reader
,
15662 struct partial_die_info
*part_die
,
15663 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
15664 const gdb_byte
*info_ptr
)
15666 struct dwarf2_cu
*cu
= reader
->cu
;
15667 struct objfile
*objfile
= cu
->objfile
;
15668 const gdb_byte
*buffer
= reader
->buffer
;
15670 struct attribute attr
;
15671 int has_low_pc_attr
= 0;
15672 int has_high_pc_attr
= 0;
15673 int high_pc_relative
= 0;
15675 memset (part_die
, 0, sizeof (struct partial_die_info
));
15677 part_die
->offset
.sect_off
= info_ptr
- buffer
;
15679 info_ptr
+= abbrev_len
;
15681 if (abbrev
== NULL
)
15684 part_die
->tag
= abbrev
->tag
;
15685 part_die
->has_children
= abbrev
->has_children
;
15687 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15689 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
15691 /* Store the data if it is of an attribute we want to keep in a
15692 partial symbol table. */
15696 switch (part_die
->tag
)
15698 case DW_TAG_compile_unit
:
15699 case DW_TAG_partial_unit
:
15700 case DW_TAG_type_unit
:
15701 /* Compilation units have a DW_AT_name that is a filename, not
15702 a source language identifier. */
15703 case DW_TAG_enumeration_type
:
15704 case DW_TAG_enumerator
:
15705 /* These tags always have simple identifiers already; no need
15706 to canonicalize them. */
15707 part_die
->name
= DW_STRING (&attr
);
15711 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
15712 &objfile
->per_bfd
->storage_obstack
);
15716 case DW_AT_linkage_name
:
15717 case DW_AT_MIPS_linkage_name
:
15718 /* Note that both forms of linkage name might appear. We
15719 assume they will be the same, and we only store the last
15721 if (cu
->language
== language_ada
)
15722 part_die
->name
= DW_STRING (&attr
);
15723 part_die
->linkage_name
= DW_STRING (&attr
);
15726 has_low_pc_attr
= 1;
15727 part_die
->lowpc
= attr_value_as_address (&attr
);
15729 case DW_AT_high_pc
:
15730 has_high_pc_attr
= 1;
15731 part_die
->highpc
= attr_value_as_address (&attr
);
15732 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
15733 high_pc_relative
= 1;
15735 case DW_AT_location
:
15736 /* Support the .debug_loc offsets. */
15737 if (attr_form_is_block (&attr
))
15739 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
15741 else if (attr_form_is_section_offset (&attr
))
15743 dwarf2_complex_location_expr_complaint ();
15747 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15748 "partial symbol information");
15751 case DW_AT_external
:
15752 part_die
->is_external
= DW_UNSND (&attr
);
15754 case DW_AT_declaration
:
15755 part_die
->is_declaration
= DW_UNSND (&attr
);
15758 part_die
->has_type
= 1;
15760 case DW_AT_abstract_origin
:
15761 case DW_AT_specification
:
15762 case DW_AT_extension
:
15763 part_die
->has_specification
= 1;
15764 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
15765 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15766 || cu
->per_cu
->is_dwz
);
15768 case DW_AT_sibling
:
15769 /* Ignore absolute siblings, they might point outside of
15770 the current compile unit. */
15771 if (attr
.form
== DW_FORM_ref_addr
)
15772 complaint (&symfile_complaints
,
15773 _("ignoring absolute DW_AT_sibling"));
15776 unsigned int off
= dwarf2_get_ref_die_offset (&attr
).sect_off
;
15777 const gdb_byte
*sibling_ptr
= buffer
+ off
;
15779 if (sibling_ptr
< info_ptr
)
15780 complaint (&symfile_complaints
,
15781 _("DW_AT_sibling points backwards"));
15782 else if (sibling_ptr
> reader
->buffer_end
)
15783 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
15785 part_die
->sibling
= sibling_ptr
;
15788 case DW_AT_byte_size
:
15789 part_die
->has_byte_size
= 1;
15791 case DW_AT_calling_convention
:
15792 /* DWARF doesn't provide a way to identify a program's source-level
15793 entry point. DW_AT_calling_convention attributes are only meant
15794 to describe functions' calling conventions.
15796 However, because it's a necessary piece of information in
15797 Fortran, and because DW_CC_program is the only piece of debugging
15798 information whose definition refers to a 'main program' at all,
15799 several compilers have begun marking Fortran main programs with
15800 DW_CC_program --- even when those functions use the standard
15801 calling conventions.
15803 So until DWARF specifies a way to provide this information and
15804 compilers pick up the new representation, we'll support this
15806 if (DW_UNSND (&attr
) == DW_CC_program
15807 && cu
->language
== language_fortran
)
15808 set_objfile_main_name (objfile
, part_die
->name
, language_fortran
);
15811 if (DW_UNSND (&attr
) == DW_INL_inlined
15812 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
15813 part_die
->may_be_inlined
= 1;
15817 if (part_die
->tag
== DW_TAG_imported_unit
)
15819 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
15820 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
15821 || cu
->per_cu
->is_dwz
);
15830 if (high_pc_relative
)
15831 part_die
->highpc
+= part_die
->lowpc
;
15833 if (has_low_pc_attr
&& has_high_pc_attr
)
15835 /* When using the GNU linker, .gnu.linkonce. sections are used to
15836 eliminate duplicate copies of functions and vtables and such.
15837 The linker will arbitrarily choose one and discard the others.
15838 The AT_*_pc values for such functions refer to local labels in
15839 these sections. If the section from that file was discarded, the
15840 labels are not in the output, so the relocs get a value of 0.
15841 If this is a discarded function, mark the pc bounds as invalid,
15842 so that GDB will ignore it. */
15843 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
15845 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15847 complaint (&symfile_complaints
,
15848 _("DW_AT_low_pc %s is zero "
15849 "for DIE at 0x%x [in module %s]"),
15850 paddress (gdbarch
, part_die
->lowpc
),
15851 part_die
->offset
.sect_off
, objfile_name (objfile
));
15853 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
15854 else if (part_die
->lowpc
>= part_die
->highpc
)
15856 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15858 complaint (&symfile_complaints
,
15859 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
15860 "for DIE at 0x%x [in module %s]"),
15861 paddress (gdbarch
, part_die
->lowpc
),
15862 paddress (gdbarch
, part_die
->highpc
),
15863 part_die
->offset
.sect_off
, objfile_name (objfile
));
15866 part_die
->has_pc_info
= 1;
15872 /* Find a cached partial DIE at OFFSET in CU. */
15874 static struct partial_die_info
*
15875 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
15877 struct partial_die_info
*lookup_die
= NULL
;
15878 struct partial_die_info part_die
;
15880 part_die
.offset
= offset
;
15881 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
15887 /* Find a partial DIE at OFFSET, which may or may not be in CU,
15888 except in the case of .debug_types DIEs which do not reference
15889 outside their CU (they do however referencing other types via
15890 DW_FORM_ref_sig8). */
15892 static struct partial_die_info
*
15893 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
15895 struct objfile
*objfile
= cu
->objfile
;
15896 struct dwarf2_per_cu_data
*per_cu
= NULL
;
15897 struct partial_die_info
*pd
= NULL
;
15899 if (offset_in_dwz
== cu
->per_cu
->is_dwz
15900 && offset_in_cu_p (&cu
->header
, offset
))
15902 pd
= find_partial_die_in_comp_unit (offset
, cu
);
15905 /* We missed recording what we needed.
15906 Load all dies and try again. */
15907 per_cu
= cu
->per_cu
;
15911 /* TUs don't reference other CUs/TUs (except via type signatures). */
15912 if (cu
->per_cu
->is_debug_types
)
15914 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
15915 " external reference to offset 0x%lx [in module %s].\n"),
15916 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
15917 bfd_get_filename (objfile
->obfd
));
15919 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
15922 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
15923 load_partial_comp_unit (per_cu
);
15925 per_cu
->cu
->last_used
= 0;
15926 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15929 /* If we didn't find it, and not all dies have been loaded,
15930 load them all and try again. */
15932 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
15934 per_cu
->load_all_dies
= 1;
15936 /* This is nasty. When we reread the DIEs, somewhere up the call chain
15937 THIS_CU->cu may already be in use. So we can't just free it and
15938 replace its DIEs with the ones we read in. Instead, we leave those
15939 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
15940 and clobber THIS_CU->cu->partial_dies with the hash table for the new
15942 load_partial_comp_unit (per_cu
);
15944 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
15948 internal_error (__FILE__
, __LINE__
,
15949 _("could not find partial DIE 0x%x "
15950 "in cache [from module %s]\n"),
15951 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
15955 /* See if we can figure out if the class lives in a namespace. We do
15956 this by looking for a member function; its demangled name will
15957 contain namespace info, if there is any. */
15960 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
15961 struct dwarf2_cu
*cu
)
15963 /* NOTE: carlton/2003-10-07: Getting the info this way changes
15964 what template types look like, because the demangler
15965 frequently doesn't give the same name as the debug info. We
15966 could fix this by only using the demangled name to get the
15967 prefix (but see comment in read_structure_type). */
15969 struct partial_die_info
*real_pdi
;
15970 struct partial_die_info
*child_pdi
;
15972 /* If this DIE (this DIE's specification, if any) has a parent, then
15973 we should not do this. We'll prepend the parent's fully qualified
15974 name when we create the partial symbol. */
15976 real_pdi
= struct_pdi
;
15977 while (real_pdi
->has_specification
)
15978 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
15979 real_pdi
->spec_is_dwz
, cu
);
15981 if (real_pdi
->die_parent
!= NULL
)
15984 for (child_pdi
= struct_pdi
->die_child
;
15986 child_pdi
= child_pdi
->die_sibling
)
15988 if (child_pdi
->tag
== DW_TAG_subprogram
15989 && child_pdi
->linkage_name
!= NULL
)
15991 char *actual_class_name
15992 = language_class_name_from_physname (cu
->language_defn
,
15993 child_pdi
->linkage_name
);
15994 if (actual_class_name
!= NULL
)
15997 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
15999 strlen (actual_class_name
));
16000 xfree (actual_class_name
);
16007 /* Adjust PART_DIE before generating a symbol for it. This function
16008 may set the is_external flag or change the DIE's name. */
16011 fixup_partial_die (struct partial_die_info
*part_die
,
16012 struct dwarf2_cu
*cu
)
16014 /* Once we've fixed up a die, there's no point in doing so again.
16015 This also avoids a memory leak if we were to call
16016 guess_partial_die_structure_name multiple times. */
16017 if (part_die
->fixup_called
)
16020 /* If we found a reference attribute and the DIE has no name, try
16021 to find a name in the referred to DIE. */
16023 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16025 struct partial_die_info
*spec_die
;
16027 spec_die
= find_partial_die (part_die
->spec_offset
,
16028 part_die
->spec_is_dwz
, cu
);
16030 fixup_partial_die (spec_die
, cu
);
16032 if (spec_die
->name
)
16034 part_die
->name
= spec_die
->name
;
16036 /* Copy DW_AT_external attribute if it is set. */
16037 if (spec_die
->is_external
)
16038 part_die
->is_external
= spec_die
->is_external
;
16042 /* Set default names for some unnamed DIEs. */
16044 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16045 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16047 /* If there is no parent die to provide a namespace, and there are
16048 children, see if we can determine the namespace from their linkage
16050 if (cu
->language
== language_cplus
16051 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16052 && part_die
->die_parent
== NULL
16053 && part_die
->has_children
16054 && (part_die
->tag
== DW_TAG_class_type
16055 || part_die
->tag
== DW_TAG_structure_type
16056 || part_die
->tag
== DW_TAG_union_type
))
16057 guess_partial_die_structure_name (part_die
, cu
);
16059 /* GCC might emit a nameless struct or union that has a linkage
16060 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16061 if (part_die
->name
== NULL
16062 && (part_die
->tag
== DW_TAG_class_type
16063 || part_die
->tag
== DW_TAG_interface_type
16064 || part_die
->tag
== DW_TAG_structure_type
16065 || part_die
->tag
== DW_TAG_union_type
)
16066 && part_die
->linkage_name
!= NULL
)
16070 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16075 /* Strip any leading namespaces/classes, keep only the base name.
16076 DW_AT_name for named DIEs does not contain the prefixes. */
16077 base
= strrchr (demangled
, ':');
16078 if (base
&& base
> demangled
&& base
[-1] == ':')
16084 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16085 base
, strlen (base
));
16090 part_die
->fixup_called
= 1;
16093 /* Read an attribute value described by an attribute form. */
16095 static const gdb_byte
*
16096 read_attribute_value (const struct die_reader_specs
*reader
,
16097 struct attribute
*attr
, unsigned form
,
16098 const gdb_byte
*info_ptr
)
16100 struct dwarf2_cu
*cu
= reader
->cu
;
16101 struct objfile
*objfile
= cu
->objfile
;
16102 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16103 bfd
*abfd
= reader
->abfd
;
16104 struct comp_unit_head
*cu_header
= &cu
->header
;
16105 unsigned int bytes_read
;
16106 struct dwarf_block
*blk
;
16111 case DW_FORM_ref_addr
:
16112 if (cu
->header
.version
== 2)
16113 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16115 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16116 &cu
->header
, &bytes_read
);
16117 info_ptr
+= bytes_read
;
16119 case DW_FORM_GNU_ref_alt
:
16120 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16121 info_ptr
+= bytes_read
;
16124 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16125 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16126 info_ptr
+= bytes_read
;
16128 case DW_FORM_block2
:
16129 blk
= dwarf_alloc_block (cu
);
16130 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16132 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16133 info_ptr
+= blk
->size
;
16134 DW_BLOCK (attr
) = blk
;
16136 case DW_FORM_block4
:
16137 blk
= dwarf_alloc_block (cu
);
16138 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16140 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16141 info_ptr
+= blk
->size
;
16142 DW_BLOCK (attr
) = blk
;
16144 case DW_FORM_data2
:
16145 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16148 case DW_FORM_data4
:
16149 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16152 case DW_FORM_data8
:
16153 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16156 case DW_FORM_sec_offset
:
16157 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16158 info_ptr
+= bytes_read
;
16160 case DW_FORM_string
:
16161 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16162 DW_STRING_IS_CANONICAL (attr
) = 0;
16163 info_ptr
+= bytes_read
;
16166 if (!cu
->per_cu
->is_dwz
)
16168 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16170 DW_STRING_IS_CANONICAL (attr
) = 0;
16171 info_ptr
+= bytes_read
;
16175 case DW_FORM_GNU_strp_alt
:
16177 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16178 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16181 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16182 DW_STRING_IS_CANONICAL (attr
) = 0;
16183 info_ptr
+= bytes_read
;
16186 case DW_FORM_exprloc
:
16187 case DW_FORM_block
:
16188 blk
= dwarf_alloc_block (cu
);
16189 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16190 info_ptr
+= bytes_read
;
16191 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16192 info_ptr
+= blk
->size
;
16193 DW_BLOCK (attr
) = blk
;
16195 case DW_FORM_block1
:
16196 blk
= dwarf_alloc_block (cu
);
16197 blk
->size
= read_1_byte (abfd
, info_ptr
);
16199 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16200 info_ptr
+= blk
->size
;
16201 DW_BLOCK (attr
) = blk
;
16203 case DW_FORM_data1
:
16204 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16208 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16211 case DW_FORM_flag_present
:
16212 DW_UNSND (attr
) = 1;
16214 case DW_FORM_sdata
:
16215 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16216 info_ptr
+= bytes_read
;
16218 case DW_FORM_udata
:
16219 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16220 info_ptr
+= bytes_read
;
16223 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16224 + read_1_byte (abfd
, info_ptr
));
16228 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16229 + read_2_bytes (abfd
, info_ptr
));
16233 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16234 + read_4_bytes (abfd
, info_ptr
));
16238 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16239 + read_8_bytes (abfd
, info_ptr
));
16242 case DW_FORM_ref_sig8
:
16243 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16246 case DW_FORM_ref_udata
:
16247 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
16248 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16249 info_ptr
+= bytes_read
;
16251 case DW_FORM_indirect
:
16252 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16253 info_ptr
+= bytes_read
;
16254 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
16256 case DW_FORM_GNU_addr_index
:
16257 if (reader
->dwo_file
== NULL
)
16259 /* For now flag a hard error.
16260 Later we can turn this into a complaint. */
16261 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16262 dwarf_form_name (form
),
16263 bfd_get_filename (abfd
));
16265 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16266 info_ptr
+= bytes_read
;
16268 case DW_FORM_GNU_str_index
:
16269 if (reader
->dwo_file
== NULL
)
16271 /* For now flag a hard error.
16272 Later we can turn this into a complaint if warranted. */
16273 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16274 dwarf_form_name (form
),
16275 bfd_get_filename (abfd
));
16278 ULONGEST str_index
=
16279 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16281 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16282 DW_STRING_IS_CANONICAL (attr
) = 0;
16283 info_ptr
+= bytes_read
;
16287 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16288 dwarf_form_name (form
),
16289 bfd_get_filename (abfd
));
16293 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16294 attr
->form
= DW_FORM_GNU_ref_alt
;
16296 /* We have seen instances where the compiler tried to emit a byte
16297 size attribute of -1 which ended up being encoded as an unsigned
16298 0xffffffff. Although 0xffffffff is technically a valid size value,
16299 an object of this size seems pretty unlikely so we can relatively
16300 safely treat these cases as if the size attribute was invalid and
16301 treat them as zero by default. */
16302 if (attr
->name
== DW_AT_byte_size
16303 && form
== DW_FORM_data4
16304 && DW_UNSND (attr
) >= 0xffffffff)
16307 (&symfile_complaints
,
16308 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
16309 hex_string (DW_UNSND (attr
)));
16310 DW_UNSND (attr
) = 0;
16316 /* Read an attribute described by an abbreviated attribute. */
16318 static const gdb_byte
*
16319 read_attribute (const struct die_reader_specs
*reader
,
16320 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
16321 const gdb_byte
*info_ptr
)
16323 attr
->name
= abbrev
->name
;
16324 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
16327 /* Read dwarf information from a buffer. */
16329 static unsigned int
16330 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
16332 return bfd_get_8 (abfd
, buf
);
16336 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
16338 return bfd_get_signed_8 (abfd
, buf
);
16341 static unsigned int
16342 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16344 return bfd_get_16 (abfd
, buf
);
16348 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16350 return bfd_get_signed_16 (abfd
, buf
);
16353 static unsigned int
16354 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16356 return bfd_get_32 (abfd
, buf
);
16360 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16362 return bfd_get_signed_32 (abfd
, buf
);
16366 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
16368 return bfd_get_64 (abfd
, buf
);
16372 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
16373 unsigned int *bytes_read
)
16375 struct comp_unit_head
*cu_header
= &cu
->header
;
16376 CORE_ADDR retval
= 0;
16378 if (cu_header
->signed_addr_p
)
16380 switch (cu_header
->addr_size
)
16383 retval
= bfd_get_signed_16 (abfd
, buf
);
16386 retval
= bfd_get_signed_32 (abfd
, buf
);
16389 retval
= bfd_get_signed_64 (abfd
, buf
);
16392 internal_error (__FILE__
, __LINE__
,
16393 _("read_address: bad switch, signed [in module %s]"),
16394 bfd_get_filename (abfd
));
16399 switch (cu_header
->addr_size
)
16402 retval
= bfd_get_16 (abfd
, buf
);
16405 retval
= bfd_get_32 (abfd
, buf
);
16408 retval
= bfd_get_64 (abfd
, buf
);
16411 internal_error (__FILE__
, __LINE__
,
16412 _("read_address: bad switch, "
16413 "unsigned [in module %s]"),
16414 bfd_get_filename (abfd
));
16418 *bytes_read
= cu_header
->addr_size
;
16422 /* Read the initial length from a section. The (draft) DWARF 3
16423 specification allows the initial length to take up either 4 bytes
16424 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
16425 bytes describe the length and all offsets will be 8 bytes in length
16428 An older, non-standard 64-bit format is also handled by this
16429 function. The older format in question stores the initial length
16430 as an 8-byte quantity without an escape value. Lengths greater
16431 than 2^32 aren't very common which means that the initial 4 bytes
16432 is almost always zero. Since a length value of zero doesn't make
16433 sense for the 32-bit format, this initial zero can be considered to
16434 be an escape value which indicates the presence of the older 64-bit
16435 format. As written, the code can't detect (old format) lengths
16436 greater than 4GB. If it becomes necessary to handle lengths
16437 somewhat larger than 4GB, we could allow other small values (such
16438 as the non-sensical values of 1, 2, and 3) to also be used as
16439 escape values indicating the presence of the old format.
16441 The value returned via bytes_read should be used to increment the
16442 relevant pointer after calling read_initial_length().
16444 [ Note: read_initial_length() and read_offset() are based on the
16445 document entitled "DWARF Debugging Information Format", revision
16446 3, draft 8, dated November 19, 2001. This document was obtained
16449 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
16451 This document is only a draft and is subject to change. (So beware.)
16453 Details regarding the older, non-standard 64-bit format were
16454 determined empirically by examining 64-bit ELF files produced by
16455 the SGI toolchain on an IRIX 6.5 machine.
16457 - Kevin, July 16, 2002
16461 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
16463 LONGEST length
= bfd_get_32 (abfd
, buf
);
16465 if (length
== 0xffffffff)
16467 length
= bfd_get_64 (abfd
, buf
+ 4);
16470 else if (length
== 0)
16472 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
16473 length
= bfd_get_64 (abfd
, buf
);
16484 /* Cover function for read_initial_length.
16485 Returns the length of the object at BUF, and stores the size of the
16486 initial length in *BYTES_READ and stores the size that offsets will be in
16488 If the initial length size is not equivalent to that specified in
16489 CU_HEADER then issue a complaint.
16490 This is useful when reading non-comp-unit headers. */
16493 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
16494 const struct comp_unit_head
*cu_header
,
16495 unsigned int *bytes_read
,
16496 unsigned int *offset_size
)
16498 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
16500 gdb_assert (cu_header
->initial_length_size
== 4
16501 || cu_header
->initial_length_size
== 8
16502 || cu_header
->initial_length_size
== 12);
16504 if (cu_header
->initial_length_size
!= *bytes_read
)
16505 complaint (&symfile_complaints
,
16506 _("intermixed 32-bit and 64-bit DWARF sections"));
16508 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
16512 /* Read an offset from the data stream. The size of the offset is
16513 given by cu_header->offset_size. */
16516 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
16517 const struct comp_unit_head
*cu_header
,
16518 unsigned int *bytes_read
)
16520 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
16522 *bytes_read
= cu_header
->offset_size
;
16526 /* Read an offset from the data stream. */
16529 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
16531 LONGEST retval
= 0;
16533 switch (offset_size
)
16536 retval
= bfd_get_32 (abfd
, buf
);
16539 retval
= bfd_get_64 (abfd
, buf
);
16542 internal_error (__FILE__
, __LINE__
,
16543 _("read_offset_1: bad switch [in module %s]"),
16544 bfd_get_filename (abfd
));
16550 static const gdb_byte
*
16551 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
16553 /* If the size of a host char is 8 bits, we can return a pointer
16554 to the buffer, otherwise we have to copy the data to a buffer
16555 allocated on the temporary obstack. */
16556 gdb_assert (HOST_CHAR_BIT
== 8);
16560 static const char *
16561 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
16562 unsigned int *bytes_read_ptr
)
16564 /* If the size of a host char is 8 bits, we can return a pointer
16565 to the string, otherwise we have to copy the string to a buffer
16566 allocated on the temporary obstack. */
16567 gdb_assert (HOST_CHAR_BIT
== 8);
16570 *bytes_read_ptr
= 1;
16573 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
16574 return (const char *) buf
;
16577 static const char *
16578 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
16580 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
16581 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
16582 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
16583 bfd_get_filename (abfd
));
16584 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
16585 error (_("DW_FORM_strp pointing outside of "
16586 ".debug_str section [in module %s]"),
16587 bfd_get_filename (abfd
));
16588 gdb_assert (HOST_CHAR_BIT
== 8);
16589 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
16591 return (const char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
16594 /* Read a string at offset STR_OFFSET in the .debug_str section from
16595 the .dwz file DWZ. Throw an error if the offset is too large. If
16596 the string consists of a single NUL byte, return NULL; otherwise
16597 return a pointer to the string. */
16599 static const char *
16600 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
16602 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
16604 if (dwz
->str
.buffer
== NULL
)
16605 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
16606 "section [in module %s]"),
16607 bfd_get_filename (dwz
->dwz_bfd
));
16608 if (str_offset
>= dwz
->str
.size
)
16609 error (_("DW_FORM_GNU_strp_alt pointing outside of "
16610 ".debug_str section [in module %s]"),
16611 bfd_get_filename (dwz
->dwz_bfd
));
16612 gdb_assert (HOST_CHAR_BIT
== 8);
16613 if (dwz
->str
.buffer
[str_offset
] == '\0')
16615 return (const char *) (dwz
->str
.buffer
+ str_offset
);
16618 static const char *
16619 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
16620 const struct comp_unit_head
*cu_header
,
16621 unsigned int *bytes_read_ptr
)
16623 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
16625 return read_indirect_string_at_offset (abfd
, str_offset
);
16629 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16630 unsigned int *bytes_read_ptr
)
16633 unsigned int num_read
;
16635 unsigned char byte
;
16643 byte
= bfd_get_8 (abfd
, buf
);
16646 result
|= ((ULONGEST
) (byte
& 127) << shift
);
16647 if ((byte
& 128) == 0)
16653 *bytes_read_ptr
= num_read
;
16658 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
16659 unsigned int *bytes_read_ptr
)
16662 int i
, shift
, num_read
;
16663 unsigned char byte
;
16671 byte
= bfd_get_8 (abfd
, buf
);
16674 result
|= ((LONGEST
) (byte
& 127) << shift
);
16676 if ((byte
& 128) == 0)
16681 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
16682 result
|= -(((LONGEST
) 1) << shift
);
16683 *bytes_read_ptr
= num_read
;
16687 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
16688 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
16689 ADDR_SIZE is the size of addresses from the CU header. */
16692 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
16694 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16695 bfd
*abfd
= objfile
->obfd
;
16696 const gdb_byte
*info_ptr
;
16698 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
16699 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
16700 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
16701 objfile_name (objfile
));
16702 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
16703 error (_("DW_FORM_addr_index pointing outside of "
16704 ".debug_addr section [in module %s]"),
16705 objfile_name (objfile
));
16706 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
16707 + addr_base
+ addr_index
* addr_size
);
16708 if (addr_size
== 4)
16709 return bfd_get_32 (abfd
, info_ptr
);
16711 return bfd_get_64 (abfd
, info_ptr
);
16714 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
16717 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
16719 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
16722 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
16725 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
16726 unsigned int *bytes_read
)
16728 bfd
*abfd
= cu
->objfile
->obfd
;
16729 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
16731 return read_addr_index (cu
, addr_index
);
16734 /* Data structure to pass results from dwarf2_read_addr_index_reader
16735 back to dwarf2_read_addr_index. */
16737 struct dwarf2_read_addr_index_data
16739 ULONGEST addr_base
;
16743 /* die_reader_func for dwarf2_read_addr_index. */
16746 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
16747 const gdb_byte
*info_ptr
,
16748 struct die_info
*comp_unit_die
,
16752 struct dwarf2_cu
*cu
= reader
->cu
;
16753 struct dwarf2_read_addr_index_data
*aidata
=
16754 (struct dwarf2_read_addr_index_data
*) data
;
16756 aidata
->addr_base
= cu
->addr_base
;
16757 aidata
->addr_size
= cu
->header
.addr_size
;
16760 /* Given an index in .debug_addr, fetch the value.
16761 NOTE: This can be called during dwarf expression evaluation,
16762 long after the debug information has been read, and thus per_cu->cu
16763 may no longer exist. */
16766 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
16767 unsigned int addr_index
)
16769 struct objfile
*objfile
= per_cu
->objfile
;
16770 struct dwarf2_cu
*cu
= per_cu
->cu
;
16771 ULONGEST addr_base
;
16774 /* This is intended to be called from outside this file. */
16775 dw2_setup (objfile
);
16777 /* We need addr_base and addr_size.
16778 If we don't have PER_CU->cu, we have to get it.
16779 Nasty, but the alternative is storing the needed info in PER_CU,
16780 which at this point doesn't seem justified: it's not clear how frequently
16781 it would get used and it would increase the size of every PER_CU.
16782 Entry points like dwarf2_per_cu_addr_size do a similar thing
16783 so we're not in uncharted territory here.
16784 Alas we need to be a bit more complicated as addr_base is contained
16787 We don't need to read the entire CU(/TU).
16788 We just need the header and top level die.
16790 IWBN to use the aging mechanism to let us lazily later discard the CU.
16791 For now we skip this optimization. */
16795 addr_base
= cu
->addr_base
;
16796 addr_size
= cu
->header
.addr_size
;
16800 struct dwarf2_read_addr_index_data aidata
;
16802 /* Note: We can't use init_cutu_and_read_dies_simple here,
16803 we need addr_base. */
16804 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
16805 dwarf2_read_addr_index_reader
, &aidata
);
16806 addr_base
= aidata
.addr_base
;
16807 addr_size
= aidata
.addr_size
;
16810 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
16813 /* Given a DW_FORM_GNU_str_index, fetch the string.
16814 This is only used by the Fission support. */
16816 static const char *
16817 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
16819 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16820 const char *objf_name
= objfile_name (objfile
);
16821 bfd
*abfd
= objfile
->obfd
;
16822 struct dwarf2_cu
*cu
= reader
->cu
;
16823 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
16824 struct dwarf2_section_info
*str_offsets_section
=
16825 &reader
->dwo_file
->sections
.str_offsets
;
16826 const gdb_byte
*info_ptr
;
16827 ULONGEST str_offset
;
16828 static const char form_name
[] = "DW_FORM_GNU_str_index";
16830 dwarf2_read_section (objfile
, str_section
);
16831 dwarf2_read_section (objfile
, str_offsets_section
);
16832 if (str_section
->buffer
== NULL
)
16833 error (_("%s used without .debug_str.dwo section"
16834 " in CU at offset 0x%lx [in module %s]"),
16835 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16836 if (str_offsets_section
->buffer
== NULL
)
16837 error (_("%s used without .debug_str_offsets.dwo section"
16838 " in CU at offset 0x%lx [in module %s]"),
16839 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16840 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
16841 error (_("%s pointing outside of .debug_str_offsets.dwo"
16842 " section in CU at offset 0x%lx [in module %s]"),
16843 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16844 info_ptr
= (str_offsets_section
->buffer
16845 + str_index
* cu
->header
.offset_size
);
16846 if (cu
->header
.offset_size
== 4)
16847 str_offset
= bfd_get_32 (abfd
, info_ptr
);
16849 str_offset
= bfd_get_64 (abfd
, info_ptr
);
16850 if (str_offset
>= str_section
->size
)
16851 error (_("Offset from %s pointing outside of"
16852 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
16853 form_name
, (long) cu
->header
.offset
.sect_off
, objf_name
);
16854 return (const char *) (str_section
->buffer
+ str_offset
);
16857 /* Return the length of an LEB128 number in BUF. */
16860 leb128_size (const gdb_byte
*buf
)
16862 const gdb_byte
*begin
= buf
;
16868 if ((byte
& 128) == 0)
16869 return buf
- begin
;
16874 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
16883 cu
->language
= language_c
;
16885 case DW_LANG_C_plus_plus
:
16886 case DW_LANG_C_plus_plus_11
:
16887 case DW_LANG_C_plus_plus_14
:
16888 cu
->language
= language_cplus
;
16891 cu
->language
= language_d
;
16893 case DW_LANG_Fortran77
:
16894 case DW_LANG_Fortran90
:
16895 case DW_LANG_Fortran95
:
16896 cu
->language
= language_fortran
;
16899 cu
->language
= language_go
;
16901 case DW_LANG_Mips_Assembler
:
16902 cu
->language
= language_asm
;
16905 cu
->language
= language_java
;
16907 case DW_LANG_Ada83
:
16908 case DW_LANG_Ada95
:
16909 cu
->language
= language_ada
;
16911 case DW_LANG_Modula2
:
16912 cu
->language
= language_m2
;
16914 case DW_LANG_Pascal83
:
16915 cu
->language
= language_pascal
;
16918 cu
->language
= language_objc
;
16920 case DW_LANG_Cobol74
:
16921 case DW_LANG_Cobol85
:
16923 cu
->language
= language_minimal
;
16926 cu
->language_defn
= language_def (cu
->language
);
16929 /* Return the named attribute or NULL if not there. */
16931 static struct attribute
*
16932 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
16937 struct attribute
*spec
= NULL
;
16939 for (i
= 0; i
< die
->num_attrs
; ++i
)
16941 if (die
->attrs
[i
].name
== name
)
16942 return &die
->attrs
[i
];
16943 if (die
->attrs
[i
].name
== DW_AT_specification
16944 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
16945 spec
= &die
->attrs
[i
];
16951 die
= follow_die_ref (die
, spec
, &cu
);
16957 /* Return the named attribute or NULL if not there,
16958 but do not follow DW_AT_specification, etc.
16959 This is for use in contexts where we're reading .debug_types dies.
16960 Following DW_AT_specification, DW_AT_abstract_origin will take us
16961 back up the chain, and we want to go down. */
16963 static struct attribute
*
16964 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
16968 for (i
= 0; i
< die
->num_attrs
; ++i
)
16969 if (die
->attrs
[i
].name
== name
)
16970 return &die
->attrs
[i
];
16975 /* Return non-zero iff the attribute NAME is defined for the given DIE,
16976 and holds a non-zero value. This function should only be used for
16977 DW_FORM_flag or DW_FORM_flag_present attributes. */
16980 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
16982 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
16984 return (attr
&& DW_UNSND (attr
));
16988 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
16990 /* A DIE is a declaration if it has a DW_AT_declaration attribute
16991 which value is non-zero. However, we have to be careful with
16992 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
16993 (via dwarf2_flag_true_p) follows this attribute. So we may
16994 end up accidently finding a declaration attribute that belongs
16995 to a different DIE referenced by the specification attribute,
16996 even though the given DIE does not have a declaration attribute. */
16997 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
16998 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17001 /* Return the die giving the specification for DIE, if there is
17002 one. *SPEC_CU is the CU containing DIE on input, and the CU
17003 containing the return value on output. If there is no
17004 specification, but there is an abstract origin, that is
17007 static struct die_info
*
17008 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17010 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17013 if (spec_attr
== NULL
)
17014 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17016 if (spec_attr
== NULL
)
17019 return follow_die_ref (die
, spec_attr
, spec_cu
);
17022 /* Free the line_header structure *LH, and any arrays and strings it
17024 NOTE: This is also used as a "cleanup" function. */
17027 free_line_header (struct line_header
*lh
)
17029 if (lh
->standard_opcode_lengths
)
17030 xfree (lh
->standard_opcode_lengths
);
17032 /* Remember that all the lh->file_names[i].name pointers are
17033 pointers into debug_line_buffer, and don't need to be freed. */
17034 if (lh
->file_names
)
17035 xfree (lh
->file_names
);
17037 /* Similarly for the include directory names. */
17038 if (lh
->include_dirs
)
17039 xfree (lh
->include_dirs
);
17044 /* Stub for free_line_header to match void * callback types. */
17047 free_line_header_voidp (void *arg
)
17049 struct line_header
*lh
= arg
;
17051 free_line_header (lh
);
17054 /* Add an entry to LH's include directory table. */
17057 add_include_dir (struct line_header
*lh
, const char *include_dir
)
17059 /* Grow the array if necessary. */
17060 if (lh
->include_dirs_size
== 0)
17062 lh
->include_dirs_size
= 1; /* for testing */
17063 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
17064 * sizeof (*lh
->include_dirs
));
17066 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
17068 lh
->include_dirs_size
*= 2;
17069 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
17070 (lh
->include_dirs_size
17071 * sizeof (*lh
->include_dirs
)));
17074 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
17077 /* Add an entry to LH's file name table. */
17080 add_file_name (struct line_header
*lh
,
17082 unsigned int dir_index
,
17083 unsigned int mod_time
,
17084 unsigned int length
)
17086 struct file_entry
*fe
;
17088 /* Grow the array if necessary. */
17089 if (lh
->file_names_size
== 0)
17091 lh
->file_names_size
= 1; /* for testing */
17092 lh
->file_names
= xmalloc (lh
->file_names_size
17093 * sizeof (*lh
->file_names
));
17095 else if (lh
->num_file_names
>= lh
->file_names_size
)
17097 lh
->file_names_size
*= 2;
17098 lh
->file_names
= xrealloc (lh
->file_names
,
17099 (lh
->file_names_size
17100 * sizeof (*lh
->file_names
)));
17103 fe
= &lh
->file_names
[lh
->num_file_names
++];
17105 fe
->dir_index
= dir_index
;
17106 fe
->mod_time
= mod_time
;
17107 fe
->length
= length
;
17108 fe
->included_p
= 0;
17112 /* A convenience function to find the proper .debug_line section for a
17115 static struct dwarf2_section_info
*
17116 get_debug_line_section (struct dwarf2_cu
*cu
)
17118 struct dwarf2_section_info
*section
;
17120 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17122 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17123 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17124 else if (cu
->per_cu
->is_dwz
)
17126 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17128 section
= &dwz
->line
;
17131 section
= &dwarf2_per_objfile
->line
;
17136 /* Read the statement program header starting at OFFSET in
17137 .debug_line, or .debug_line.dwo. Return a pointer
17138 to a struct line_header, allocated using xmalloc.
17140 NOTE: the strings in the include directory and file name tables of
17141 the returned object point into the dwarf line section buffer,
17142 and must not be freed. */
17144 static struct line_header
*
17145 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
17147 struct cleanup
*back_to
;
17148 struct line_header
*lh
;
17149 const gdb_byte
*line_ptr
;
17150 unsigned int bytes_read
, offset_size
;
17152 const char *cur_dir
, *cur_file
;
17153 struct dwarf2_section_info
*section
;
17156 section
= get_debug_line_section (cu
);
17157 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17158 if (section
->buffer
== NULL
)
17160 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17161 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
17163 complaint (&symfile_complaints
, _("missing .debug_line section"));
17167 /* We can't do this until we know the section is non-empty.
17168 Only then do we know we have such a section. */
17169 abfd
= get_section_bfd_owner (section
);
17171 /* Make sure that at least there's room for the total_length field.
17172 That could be 12 bytes long, but we're just going to fudge that. */
17173 if (offset
+ 4 >= section
->size
)
17175 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17179 lh
= xmalloc (sizeof (*lh
));
17180 memset (lh
, 0, sizeof (*lh
));
17181 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
17184 lh
->offset
.sect_off
= offset
;
17185 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
17187 line_ptr
= section
->buffer
+ offset
;
17189 /* Read in the header. */
17191 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
17192 &bytes_read
, &offset_size
);
17193 line_ptr
+= bytes_read
;
17194 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
17196 dwarf2_statement_list_fits_in_line_number_section_complaint ();
17197 do_cleanups (back_to
);
17200 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
17201 lh
->version
= read_2_bytes (abfd
, line_ptr
);
17203 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
17204 line_ptr
+= offset_size
;
17205 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
17207 if (lh
->version
>= 4)
17209 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
17213 lh
->maximum_ops_per_instruction
= 1;
17215 if (lh
->maximum_ops_per_instruction
== 0)
17217 lh
->maximum_ops_per_instruction
= 1;
17218 complaint (&symfile_complaints
,
17219 _("invalid maximum_ops_per_instruction "
17220 "in `.debug_line' section"));
17223 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
17225 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
17227 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
17229 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
17231 lh
->standard_opcode_lengths
17232 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
17234 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
17235 for (i
= 1; i
< lh
->opcode_base
; ++i
)
17237 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
17241 /* Read directory table. */
17242 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17244 line_ptr
+= bytes_read
;
17245 add_include_dir (lh
, cur_dir
);
17247 line_ptr
+= bytes_read
;
17249 /* Read file name table. */
17250 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
17252 unsigned int dir_index
, mod_time
, length
;
17254 line_ptr
+= bytes_read
;
17255 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17256 line_ptr
+= bytes_read
;
17257 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17258 line_ptr
+= bytes_read
;
17259 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17260 line_ptr
+= bytes_read
;
17262 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17264 line_ptr
+= bytes_read
;
17265 lh
->statement_program_start
= line_ptr
;
17267 if (line_ptr
> (section
->buffer
+ section
->size
))
17268 complaint (&symfile_complaints
,
17269 _("line number info header doesn't "
17270 "fit in `.debug_line' section"));
17272 discard_cleanups (back_to
);
17276 /* Subroutine of dwarf_decode_lines to simplify it.
17277 Return the file name of the psymtab for included file FILE_INDEX
17278 in line header LH of PST.
17279 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17280 If space for the result is malloc'd, it will be freed by a cleanup.
17281 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
17283 The function creates dangling cleanup registration. */
17285 static const char *
17286 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
17287 const struct partial_symtab
*pst
,
17288 const char *comp_dir
)
17290 const struct file_entry fe
= lh
->file_names
[file_index
];
17291 const char *include_name
= fe
.name
;
17292 const char *include_name_to_compare
= include_name
;
17293 const char *dir_name
= NULL
;
17294 const char *pst_filename
;
17295 char *copied_name
= NULL
;
17299 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
17301 if (!IS_ABSOLUTE_PATH (include_name
)
17302 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
17304 /* Avoid creating a duplicate psymtab for PST.
17305 We do this by comparing INCLUDE_NAME and PST_FILENAME.
17306 Before we do the comparison, however, we need to account
17307 for DIR_NAME and COMP_DIR.
17308 First prepend dir_name (if non-NULL). If we still don't
17309 have an absolute path prepend comp_dir (if non-NULL).
17310 However, the directory we record in the include-file's
17311 psymtab does not contain COMP_DIR (to match the
17312 corresponding symtab(s)).
17317 bash$ gcc -g ./hello.c
17318 include_name = "hello.c"
17320 DW_AT_comp_dir = comp_dir = "/tmp"
17321 DW_AT_name = "./hello.c"
17325 if (dir_name
!= NULL
)
17327 char *tem
= concat (dir_name
, SLASH_STRING
,
17328 include_name
, (char *)NULL
);
17330 make_cleanup (xfree
, tem
);
17331 include_name
= tem
;
17332 include_name_to_compare
= include_name
;
17334 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
17336 char *tem
= concat (comp_dir
, SLASH_STRING
,
17337 include_name
, (char *)NULL
);
17339 make_cleanup (xfree
, tem
);
17340 include_name_to_compare
= tem
;
17344 pst_filename
= pst
->filename
;
17345 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
17347 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
17348 pst_filename
, (char *)NULL
);
17349 pst_filename
= copied_name
;
17352 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
17354 if (copied_name
!= NULL
)
17355 xfree (copied_name
);
17359 return include_name
;
17362 /* Ignore this record_line request. */
17365 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17370 /* Return non-zero if we should add LINE to the line number table.
17371 LINE is the line to add, LAST_LINE is the last line that was added,
17372 LAST_SUBFILE is the subfile for LAST_LINE.
17373 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
17374 had a non-zero discriminator.
17376 We have to be careful in the presence of discriminators.
17377 E.g., for this line:
17379 for (i = 0; i < 100000; i++);
17381 clang can emit four line number entries for that one line,
17382 each with a different discriminator.
17383 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
17385 However, we want gdb to coalesce all four entries into one.
17386 Otherwise the user could stepi into the middle of the line and
17387 gdb would get confused about whether the pc really was in the
17388 middle of the line.
17390 Things are further complicated by the fact that two consecutive
17391 line number entries for the same line is a heuristic used by gcc
17392 to denote the end of the prologue. So we can't just discard duplicate
17393 entries, we have to be selective about it. The heuristic we use is
17394 that we only collapse consecutive entries for the same line if at least
17395 one of those entries has a non-zero discriminator. PR 17276.
17397 Note: Addresses in the line number state machine can never go backwards
17398 within one sequence, thus this coalescing is ok. */
17401 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
17402 int line_has_non_zero_discriminator
,
17403 struct subfile
*last_subfile
)
17405 if (current_subfile
!= last_subfile
)
17407 if (line
!= last_line
)
17409 /* Same line for the same file that we've seen already.
17410 As a last check, for pr 17276, only record the line if the line
17411 has never had a non-zero discriminator. */
17412 if (!line_has_non_zero_discriminator
)
17417 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
17418 in the line table of subfile SUBFILE. */
17421 dwarf_record_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17422 unsigned int line
, CORE_ADDR address
,
17423 record_line_ftype p_record_line
)
17425 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
17427 (*p_record_line
) (subfile
, line
, addr
);
17430 /* Subroutine of dwarf_decode_lines_1 to simplify it.
17431 Mark the end of a set of line number records.
17432 The arguments are the same as for dwarf_record_line.
17433 If SUBFILE is NULL the request is ignored. */
17436 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
17437 CORE_ADDR address
, record_line_ftype p_record_line
)
17439 if (subfile
!= NULL
)
17440 dwarf_record_line (gdbarch
, subfile
, 0, address
, p_record_line
);
17443 /* Subroutine of dwarf_decode_lines to simplify it.
17444 Process the line number information in LH. */
17447 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
17448 const int decode_for_pst_p
, CORE_ADDR lowpc
)
17450 const gdb_byte
*line_ptr
, *extended_end
;
17451 const gdb_byte
*line_end
;
17452 unsigned int bytes_read
, extended_len
;
17453 unsigned char op_code
, extended_op
;
17454 CORE_ADDR baseaddr
;
17455 struct objfile
*objfile
= cu
->objfile
;
17456 bfd
*abfd
= objfile
->obfd
;
17457 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17458 struct subfile
*last_subfile
= NULL
;
17459 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
17462 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
17464 line_ptr
= lh
->statement_program_start
;
17465 line_end
= lh
->statement_program_end
;
17467 /* Read the statement sequences until there's nothing left. */
17468 while (line_ptr
< line_end
)
17470 /* State machine registers. Call `gdbarch_adjust_dwarf2_line'
17471 on the initial 0 address as if there was a line entry for it
17472 so that the backend has a chance to adjust it and also record
17473 it in case it needs it. This is currently used by MIPS code,
17474 cf. `mips_adjust_dwarf2_line'. */
17475 CORE_ADDR address
= gdbarch_adjust_dwarf2_line (gdbarch
, 0, 0);
17476 unsigned int file
= 1;
17477 unsigned int line
= 1;
17478 int is_stmt
= lh
->default_is_stmt
;
17479 int end_sequence
= 0;
17480 unsigned char op_index
= 0;
17481 unsigned int discriminator
= 0;
17482 /* The last line number that was recorded, used to coalesce
17483 consecutive entries for the same line. This can happen, for
17484 example, when discriminators are present. PR 17276. */
17485 unsigned int last_line
= 0;
17486 int line_has_non_zero_discriminator
= 0;
17488 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
17490 /* Start a subfile for the current file of the state machine. */
17491 /* lh->include_dirs and lh->file_names are 0-based, but the
17492 directory and file name numbers in the statement program
17494 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17495 const char *dir
= NULL
;
17498 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17500 dwarf2_start_subfile (fe
->name
, dir
);
17503 /* Decode the table. */
17504 while (!end_sequence
)
17506 op_code
= read_1_byte (abfd
, line_ptr
);
17508 if (line_ptr
> line_end
)
17510 dwarf2_debug_line_missing_end_sequence_complaint ();
17514 if (op_code
>= lh
->opcode_base
)
17516 /* Special opcode. */
17517 unsigned char adj_opcode
;
17518 CORE_ADDR addr_adj
;
17521 adj_opcode
= op_code
- lh
->opcode_base
;
17522 addr_adj
= (((op_index
+ (adj_opcode
/ lh
->line_range
))
17523 / lh
->maximum_ops_per_instruction
)
17524 * lh
->minimum_instruction_length
);
17525 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17526 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
17527 % lh
->maximum_ops_per_instruction
);
17528 line_delta
= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
17529 line
+= line_delta
;
17530 if (line_delta
!= 0)
17531 line_has_non_zero_discriminator
= discriminator
!= 0;
17532 if (lh
->num_file_names
< file
|| file
== 0)
17533 dwarf2_debug_line_missing_file_complaint ();
17534 /* For now we ignore lines not starting on an
17535 instruction boundary. */
17536 else if (op_index
== 0)
17538 lh
->file_names
[file
- 1].included_p
= 1;
17539 if (!decode_for_pst_p
&& is_stmt
)
17541 if (last_subfile
!= current_subfile
)
17543 dwarf_finish_line (gdbarch
, last_subfile
,
17544 address
, p_record_line
);
17546 if (dwarf_record_line_p (line
, last_line
,
17547 line_has_non_zero_discriminator
,
17550 dwarf_record_line (gdbarch
, current_subfile
,
17551 line
, address
, p_record_line
);
17553 last_subfile
= current_subfile
;
17559 else switch (op_code
)
17561 case DW_LNS_extended_op
:
17562 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
17564 line_ptr
+= bytes_read
;
17565 extended_end
= line_ptr
+ extended_len
;
17566 extended_op
= read_1_byte (abfd
, line_ptr
);
17568 switch (extended_op
)
17570 case DW_LNE_end_sequence
:
17571 p_record_line
= record_line
;
17574 case DW_LNE_set_address
:
17575 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
17577 /* If address < lowpc then it's not a usable value, it's
17578 outside the pc range of the CU. However, we restrict
17579 the test to only address values of zero to preserve
17580 GDB's previous behaviour which is to handle the specific
17581 case of a function being GC'd by the linker. */
17582 if (address
== 0 && address
< lowpc
)
17584 /* This line table is for a function which has been
17585 GCd by the linker. Ignore it. PR gdb/12528 */
17588 = line_ptr
- get_debug_line_section (cu
)->buffer
;
17590 complaint (&symfile_complaints
,
17591 _(".debug_line address at offset 0x%lx is 0 "
17593 line_offset
, objfile_name (objfile
));
17594 p_record_line
= noop_record_line
;
17595 /* Note: p_record_line is left as noop_record_line
17596 until we see DW_LNE_end_sequence. */
17600 line_ptr
+= bytes_read
;
17601 address
+= baseaddr
;
17602 address
= gdbarch_adjust_dwarf2_line (gdbarch
, address
, 0);
17604 case DW_LNE_define_file
:
17606 const char *cur_file
;
17607 unsigned int dir_index
, mod_time
, length
;
17609 cur_file
= read_direct_string (abfd
, line_ptr
,
17611 line_ptr
+= bytes_read
;
17613 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17614 line_ptr
+= bytes_read
;
17616 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17617 line_ptr
+= bytes_read
;
17619 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17620 line_ptr
+= bytes_read
;
17621 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
17624 case DW_LNE_set_discriminator
:
17625 /* The discriminator is not interesting to the debugger;
17626 just ignore it. We still need to check its value though:
17627 if there are consecutive entries for the same
17628 (non-prologue) line we want to coalesce them.
17630 discriminator
= read_unsigned_leb128 (abfd
, line_ptr
,
17632 line_has_non_zero_discriminator
|= discriminator
!= 0;
17633 line_ptr
+= bytes_read
;
17636 complaint (&symfile_complaints
,
17637 _("mangled .debug_line section"));
17640 /* Make sure that we parsed the extended op correctly. If e.g.
17641 we expected a different address size than the producer used,
17642 we may have read the wrong number of bytes. */
17643 if (line_ptr
!= extended_end
)
17645 complaint (&symfile_complaints
,
17646 _("mangled .debug_line section"));
17651 if (lh
->num_file_names
< file
|| file
== 0)
17652 dwarf2_debug_line_missing_file_complaint ();
17655 lh
->file_names
[file
- 1].included_p
= 1;
17656 if (!decode_for_pst_p
&& is_stmt
)
17658 if (last_subfile
!= current_subfile
)
17660 dwarf_finish_line (gdbarch
, last_subfile
,
17661 address
, p_record_line
);
17663 if (dwarf_record_line_p (line
, last_line
,
17664 line_has_non_zero_discriminator
,
17667 dwarf_record_line (gdbarch
, current_subfile
,
17668 line
, address
, p_record_line
);
17670 last_subfile
= current_subfile
;
17676 case DW_LNS_advance_pc
:
17679 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17680 CORE_ADDR addr_adj
;
17682 addr_adj
= (((op_index
+ adjust
)
17683 / lh
->maximum_ops_per_instruction
)
17684 * lh
->minimum_instruction_length
);
17685 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17686 op_index
= ((op_index
+ adjust
)
17687 % lh
->maximum_ops_per_instruction
);
17688 line_ptr
+= bytes_read
;
17691 case DW_LNS_advance_line
:
17694 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
17696 line
+= line_delta
;
17697 if (line_delta
!= 0)
17698 line_has_non_zero_discriminator
= discriminator
!= 0;
17699 line_ptr
+= bytes_read
;
17702 case DW_LNS_set_file
:
17704 /* The arrays lh->include_dirs and lh->file_names are
17705 0-based, but the directory and file name numbers in
17706 the statement program are 1-based. */
17707 struct file_entry
*fe
;
17708 const char *dir
= NULL
;
17710 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17711 line_ptr
+= bytes_read
;
17712 if (lh
->num_file_names
< file
|| file
== 0)
17713 dwarf2_debug_line_missing_file_complaint ();
17716 fe
= &lh
->file_names
[file
- 1];
17718 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17719 if (!decode_for_pst_p
)
17721 last_subfile
= current_subfile
;
17722 line_has_non_zero_discriminator
= discriminator
!= 0;
17723 dwarf2_start_subfile (fe
->name
, dir
);
17728 case DW_LNS_set_column
:
17729 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17730 line_ptr
+= bytes_read
;
17732 case DW_LNS_negate_stmt
:
17733 is_stmt
= (!is_stmt
);
17735 case DW_LNS_set_basic_block
:
17737 /* Add to the address register of the state machine the
17738 address increment value corresponding to special opcode
17739 255. I.e., this value is scaled by the minimum
17740 instruction length since special opcode 255 would have
17741 scaled the increment. */
17742 case DW_LNS_const_add_pc
:
17744 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
17745 CORE_ADDR addr_adj
;
17747 addr_adj
= (((op_index
+ adjust
)
17748 / lh
->maximum_ops_per_instruction
)
17749 * lh
->minimum_instruction_length
);
17750 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17751 op_index
= ((op_index
+ adjust
)
17752 % lh
->maximum_ops_per_instruction
);
17755 case DW_LNS_fixed_advance_pc
:
17757 CORE_ADDR addr_adj
;
17759 addr_adj
= read_2_bytes (abfd
, line_ptr
);
17760 address
+= gdbarch_adjust_dwarf2_line (gdbarch
, addr_adj
, 1);
17767 /* Unknown standard opcode, ignore it. */
17770 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
17772 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
17773 line_ptr
+= bytes_read
;
17778 if (lh
->num_file_names
< file
|| file
== 0)
17779 dwarf2_debug_line_missing_file_complaint ();
17782 lh
->file_names
[file
- 1].included_p
= 1;
17783 if (!decode_for_pst_p
)
17785 dwarf_finish_line (gdbarch
, current_subfile
, address
,
17792 /* Decode the Line Number Program (LNP) for the given line_header
17793 structure and CU. The actual information extracted and the type
17794 of structures created from the LNP depends on the value of PST.
17796 1. If PST is NULL, then this procedure uses the data from the program
17797 to create all necessary symbol tables, and their linetables.
17799 2. If PST is not NULL, this procedure reads the program to determine
17800 the list of files included by the unit represented by PST, and
17801 builds all the associated partial symbol tables.
17803 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
17804 It is used for relative paths in the line table.
17805 NOTE: When processing partial symtabs (pst != NULL),
17806 comp_dir == pst->dirname.
17808 NOTE: It is important that psymtabs have the same file name (via strcmp)
17809 as the corresponding symtab. Since COMP_DIR is not used in the name of the
17810 symtab we don't use it in the name of the psymtabs we create.
17811 E.g. expand_line_sal requires this when finding psymtabs to expand.
17812 A good testcase for this is mb-inline.exp.
17814 LOWPC is the lowest address in CU (or 0 if not known).
17816 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
17817 for its PC<->lines mapping information. Otherwise only the filename
17818 table is read in. */
17821 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
17822 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
17823 CORE_ADDR lowpc
, int decode_mapping
)
17825 struct objfile
*objfile
= cu
->objfile
;
17826 const int decode_for_pst_p
= (pst
!= NULL
);
17828 if (decode_mapping
)
17829 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
17831 if (decode_for_pst_p
)
17835 /* Now that we're done scanning the Line Header Program, we can
17836 create the psymtab of each included file. */
17837 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
17838 if (lh
->file_names
[file_index
].included_p
== 1)
17840 const char *include_name
=
17841 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
17842 if (include_name
!= NULL
)
17843 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
17848 /* Make sure a symtab is created for every file, even files
17849 which contain only variables (i.e. no code with associated
17851 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
17854 for (i
= 0; i
< lh
->num_file_names
; i
++)
17856 const char *dir
= NULL
;
17857 struct file_entry
*fe
;
17859 fe
= &lh
->file_names
[i
];
17861 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17862 dwarf2_start_subfile (fe
->name
, dir
);
17864 if (current_subfile
->symtab
== NULL
)
17866 current_subfile
->symtab
17867 = allocate_symtab (cust
, current_subfile
->name
);
17869 fe
->symtab
= current_subfile
->symtab
;
17874 /* Start a subfile for DWARF. FILENAME is the name of the file and
17875 DIRNAME the name of the source directory which contains FILENAME
17876 or NULL if not known.
17877 This routine tries to keep line numbers from identical absolute and
17878 relative file names in a common subfile.
17880 Using the `list' example from the GDB testsuite, which resides in
17881 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
17882 of /srcdir/list0.c yields the following debugging information for list0.c:
17884 DW_AT_name: /srcdir/list0.c
17885 DW_AT_comp_dir: /compdir
17886 files.files[0].name: list0.h
17887 files.files[0].dir: /srcdir
17888 files.files[1].name: list0.c
17889 files.files[1].dir: /srcdir
17891 The line number information for list0.c has to end up in a single
17892 subfile, so that `break /srcdir/list0.c:1' works as expected.
17893 start_subfile will ensure that this happens provided that we pass the
17894 concatenation of files.files[1].dir and files.files[1].name as the
17898 dwarf2_start_subfile (const char *filename
, const char *dirname
)
17902 /* In order not to lose the line information directory,
17903 we concatenate it to the filename when it makes sense.
17904 Note that the Dwarf3 standard says (speaking of filenames in line
17905 information): ``The directory index is ignored for file names
17906 that represent full path names''. Thus ignoring dirname in the
17907 `else' branch below isn't an issue. */
17909 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
17911 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
17915 start_subfile (filename
);
17921 /* Start a symtab for DWARF.
17922 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
17924 static struct compunit_symtab
*
17925 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
17926 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
17928 struct compunit_symtab
*cust
17929 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
17931 record_debugformat ("DWARF 2");
17932 record_producer (cu
->producer
);
17934 /* We assume that we're processing GCC output. */
17935 processing_gcc_compilation
= 2;
17937 cu
->processing_has_namespace_info
= 0;
17943 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
17944 struct dwarf2_cu
*cu
)
17946 struct objfile
*objfile
= cu
->objfile
;
17947 struct comp_unit_head
*cu_header
= &cu
->header
;
17949 /* NOTE drow/2003-01-30: There used to be a comment and some special
17950 code here to turn a symbol with DW_AT_external and a
17951 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
17952 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
17953 with some versions of binutils) where shared libraries could have
17954 relocations against symbols in their debug information - the
17955 minimal symbol would have the right address, but the debug info
17956 would not. It's no longer necessary, because we will explicitly
17957 apply relocations when we read in the debug information now. */
17959 /* A DW_AT_location attribute with no contents indicates that a
17960 variable has been optimized away. */
17961 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
17963 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
17967 /* Handle one degenerate form of location expression specially, to
17968 preserve GDB's previous behavior when section offsets are
17969 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
17970 then mark this symbol as LOC_STATIC. */
17972 if (attr_form_is_block (attr
)
17973 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
17974 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
17975 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
17976 && (DW_BLOCK (attr
)->size
17977 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
17979 unsigned int dummy
;
17981 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
17982 SYMBOL_VALUE_ADDRESS (sym
) =
17983 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
17985 SYMBOL_VALUE_ADDRESS (sym
) =
17986 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
17987 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
17988 fixup_symbol_section (sym
, objfile
);
17989 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
17990 SYMBOL_SECTION (sym
));
17994 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
17995 expression evaluator, and use LOC_COMPUTED only when necessary
17996 (i.e. when the value of a register or memory location is
17997 referenced, or a thread-local block, etc.). Then again, it might
17998 not be worthwhile. I'm assuming that it isn't unless performance
17999 or memory numbers show me otherwise. */
18001 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
18003 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
18004 cu
->has_loclist
= 1;
18007 /* Given a pointer to a DWARF information entry, figure out if we need
18008 to make a symbol table entry for it, and if so, create a new entry
18009 and return a pointer to it.
18010 If TYPE is NULL, determine symbol type from the die, otherwise
18011 used the passed type.
18012 If SPACE is not NULL, use it to hold the new symbol. If it is
18013 NULL, allocate a new symbol on the objfile's obstack. */
18015 static struct symbol
*
18016 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
18017 struct symbol
*space
)
18019 struct objfile
*objfile
= cu
->objfile
;
18020 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18021 struct symbol
*sym
= NULL
;
18023 struct attribute
*attr
= NULL
;
18024 struct attribute
*attr2
= NULL
;
18025 CORE_ADDR baseaddr
;
18026 struct pending
**list_to_add
= NULL
;
18028 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
18030 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18032 name
= dwarf2_name (die
, cu
);
18035 const char *linkagename
;
18036 int suppress_add
= 0;
18041 sym
= allocate_symbol (objfile
);
18042 OBJSTAT (objfile
, n_syms
++);
18044 /* Cache this symbol's name and the name's demangled form (if any). */
18045 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
18046 linkagename
= dwarf2_physname (name
, die
, cu
);
18047 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
18049 /* Fortran does not have mangling standard and the mangling does differ
18050 between gfortran, iFort etc. */
18051 if (cu
->language
== language_fortran
18052 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
18053 symbol_set_demangled_name (&(sym
->ginfo
),
18054 dwarf2_full_name (name
, die
, cu
),
18057 /* Default assumptions.
18058 Use the passed type or decode it from the die. */
18059 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18060 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
18062 SYMBOL_TYPE (sym
) = type
;
18064 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
18065 attr
= dwarf2_attr (die
,
18066 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
18070 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
18073 attr
= dwarf2_attr (die
,
18074 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
18078 int file_index
= DW_UNSND (attr
);
18080 if (cu
->line_header
== NULL
18081 || file_index
> cu
->line_header
->num_file_names
)
18082 complaint (&symfile_complaints
,
18083 _("file index out of range"));
18084 else if (file_index
> 0)
18086 struct file_entry
*fe
;
18088 fe
= &cu
->line_header
->file_names
[file_index
- 1];
18089 symbol_set_symtab (sym
, fe
->symtab
);
18096 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
18101 addr
= attr_value_as_address (attr
);
18102 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
18103 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
18105 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
18106 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
18107 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
18108 add_symbol_to_list (sym
, cu
->list_in_scope
);
18110 case DW_TAG_subprogram
:
18111 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18113 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18114 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18115 if ((attr2
&& (DW_UNSND (attr2
) != 0))
18116 || cu
->language
== language_ada
)
18118 /* Subprograms marked external are stored as a global symbol.
18119 Ada subprograms, whether marked external or not, are always
18120 stored as a global symbol, because we want to be able to
18121 access them globally. For instance, we want to be able
18122 to break on a nested subprogram without having to
18123 specify the context. */
18124 list_to_add
= &global_symbols
;
18128 list_to_add
= cu
->list_in_scope
;
18131 case DW_TAG_inlined_subroutine
:
18132 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
18134 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
18135 SYMBOL_INLINED (sym
) = 1;
18136 list_to_add
= cu
->list_in_scope
;
18138 case DW_TAG_template_value_param
:
18140 /* Fall through. */
18141 case DW_TAG_constant
:
18142 case DW_TAG_variable
:
18143 case DW_TAG_member
:
18144 /* Compilation with minimal debug info may result in
18145 variables with missing type entries. Change the
18146 misleading `void' type to something sensible. */
18147 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
18149 = objfile_type (objfile
)->nodebug_data_symbol
;
18151 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18152 /* In the case of DW_TAG_member, we should only be called for
18153 static const members. */
18154 if (die
->tag
== DW_TAG_member
)
18156 /* dwarf2_add_field uses die_is_declaration,
18157 so we do the same. */
18158 gdb_assert (die_is_declaration (die
, cu
));
18163 dwarf2_const_value (attr
, sym
, cu
);
18164 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18167 if (attr2
&& (DW_UNSND (attr2
) != 0))
18168 list_to_add
= &global_symbols
;
18170 list_to_add
= cu
->list_in_scope
;
18174 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18177 var_decode_location (attr
, sym
, cu
);
18178 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18180 /* Fortran explicitly imports any global symbols to the local
18181 scope by DW_TAG_common_block. */
18182 if (cu
->language
== language_fortran
&& die
->parent
18183 && die
->parent
->tag
== DW_TAG_common_block
)
18186 if (SYMBOL_CLASS (sym
) == LOC_STATIC
18187 && SYMBOL_VALUE_ADDRESS (sym
) == 0
18188 && !dwarf2_per_objfile
->has_section_at_zero
)
18190 /* When a static variable is eliminated by the linker,
18191 the corresponding debug information is not stripped
18192 out, but the variable address is set to null;
18193 do not add such variables into symbol table. */
18195 else if (attr2
&& (DW_UNSND (attr2
) != 0))
18197 /* Workaround gfortran PR debug/40040 - it uses
18198 DW_AT_location for variables in -fPIC libraries which may
18199 get overriden by other libraries/executable and get
18200 a different address. Resolve it by the minimal symbol
18201 which may come from inferior's executable using copy
18202 relocation. Make this workaround only for gfortran as for
18203 other compilers GDB cannot guess the minimal symbol
18204 Fortran mangling kind. */
18205 if (cu
->language
== language_fortran
&& die
->parent
18206 && die
->parent
->tag
== DW_TAG_module
18208 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
18209 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18211 /* A variable with DW_AT_external is never static,
18212 but it may be block-scoped. */
18213 list_to_add
= (cu
->list_in_scope
== &file_symbols
18214 ? &global_symbols
: cu
->list_in_scope
);
18217 list_to_add
= cu
->list_in_scope
;
18221 /* We do not know the address of this symbol.
18222 If it is an external symbol and we have type information
18223 for it, enter the symbol as a LOC_UNRESOLVED symbol.
18224 The address of the variable will then be determined from
18225 the minimal symbol table whenever the variable is
18227 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
18229 /* Fortran explicitly imports any global symbols to the local
18230 scope by DW_TAG_common_block. */
18231 if (cu
->language
== language_fortran
&& die
->parent
18232 && die
->parent
->tag
== DW_TAG_common_block
)
18234 /* SYMBOL_CLASS doesn't matter here because
18235 read_common_block is going to reset it. */
18237 list_to_add
= cu
->list_in_scope
;
18239 else if (attr2
&& (DW_UNSND (attr2
) != 0)
18240 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
18242 /* A variable with DW_AT_external is never static, but it
18243 may be block-scoped. */
18244 list_to_add
= (cu
->list_in_scope
== &file_symbols
18245 ? &global_symbols
: cu
->list_in_scope
);
18247 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
18249 else if (!die_is_declaration (die
, cu
))
18251 /* Use the default LOC_OPTIMIZED_OUT class. */
18252 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
18254 list_to_add
= cu
->list_in_scope
;
18258 case DW_TAG_formal_parameter
:
18259 /* If we are inside a function, mark this as an argument. If
18260 not, we might be looking at an argument to an inlined function
18261 when we do not have enough information to show inlined frames;
18262 pretend it's a local variable in that case so that the user can
18264 if (context_stack_depth
> 0
18265 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
18266 SYMBOL_IS_ARGUMENT (sym
) = 1;
18267 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
18270 var_decode_location (attr
, sym
, cu
);
18272 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18275 dwarf2_const_value (attr
, sym
, cu
);
18278 list_to_add
= cu
->list_in_scope
;
18280 case DW_TAG_unspecified_parameters
:
18281 /* From varargs functions; gdb doesn't seem to have any
18282 interest in this information, so just ignore it for now.
18285 case DW_TAG_template_type_param
:
18287 /* Fall through. */
18288 case DW_TAG_class_type
:
18289 case DW_TAG_interface_type
:
18290 case DW_TAG_structure_type
:
18291 case DW_TAG_union_type
:
18292 case DW_TAG_set_type
:
18293 case DW_TAG_enumeration_type
:
18294 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18295 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
18298 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
18299 really ever be static objects: otherwise, if you try
18300 to, say, break of a class's method and you're in a file
18301 which doesn't mention that class, it won't work unless
18302 the check for all static symbols in lookup_symbol_aux
18303 saves you. See the OtherFileClass tests in
18304 gdb.c++/namespace.exp. */
18308 list_to_add
= (cu
->list_in_scope
== &file_symbols
18309 && (cu
->language
== language_cplus
18310 || cu
->language
== language_java
)
18311 ? &global_symbols
: cu
->list_in_scope
);
18313 /* The semantics of C++ state that "struct foo {
18314 ... }" also defines a typedef for "foo". A Java
18315 class declaration also defines a typedef for the
18317 if (cu
->language
== language_cplus
18318 || cu
->language
== language_java
18319 || cu
->language
== language_ada
)
18321 /* The symbol's name is already allocated along
18322 with this objfile, so we don't need to
18323 duplicate it for the type. */
18324 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
18325 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
18330 case DW_TAG_typedef
:
18331 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18332 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18333 list_to_add
= cu
->list_in_scope
;
18335 case DW_TAG_base_type
:
18336 case DW_TAG_subrange_type
:
18337 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18338 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
18339 list_to_add
= cu
->list_in_scope
;
18341 case DW_TAG_enumerator
:
18342 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
18345 dwarf2_const_value (attr
, sym
, cu
);
18348 /* NOTE: carlton/2003-11-10: See comment above in the
18349 DW_TAG_class_type, etc. block. */
18351 list_to_add
= (cu
->list_in_scope
== &file_symbols
18352 && (cu
->language
== language_cplus
18353 || cu
->language
== language_java
)
18354 ? &global_symbols
: cu
->list_in_scope
);
18357 case DW_TAG_imported_declaration
:
18358 case DW_TAG_namespace
:
18359 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18360 list_to_add
= &global_symbols
;
18362 case DW_TAG_module
:
18363 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
18364 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
18365 list_to_add
= &global_symbols
;
18367 case DW_TAG_common_block
:
18368 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
18369 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
18370 add_symbol_to_list (sym
, cu
->list_in_scope
);
18373 /* Not a tag we recognize. Hopefully we aren't processing
18374 trash data, but since we must specifically ignore things
18375 we don't recognize, there is nothing else we should do at
18377 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
18378 dwarf_tag_name (die
->tag
));
18384 sym
->hash_next
= objfile
->template_symbols
;
18385 objfile
->template_symbols
= sym
;
18386 list_to_add
= NULL
;
18389 if (list_to_add
!= NULL
)
18390 add_symbol_to_list (sym
, list_to_add
);
18392 /* For the benefit of old versions of GCC, check for anonymous
18393 namespaces based on the demangled name. */
18394 if (!cu
->processing_has_namespace_info
18395 && cu
->language
== language_cplus
)
18396 cp_scan_for_anonymous_namespaces (sym
, objfile
);
18401 /* A wrapper for new_symbol_full that always allocates a new symbol. */
18403 static struct symbol
*
18404 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18406 return new_symbol_full (die
, type
, cu
, NULL
);
18409 /* Given an attr with a DW_FORM_dataN value in host byte order,
18410 zero-extend it as appropriate for the symbol's type. The DWARF
18411 standard (v4) is not entirely clear about the meaning of using
18412 DW_FORM_dataN for a constant with a signed type, where the type is
18413 wider than the data. The conclusion of a discussion on the DWARF
18414 list was that this is unspecified. We choose to always zero-extend
18415 because that is the interpretation long in use by GCC. */
18418 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
18419 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
18421 struct objfile
*objfile
= cu
->objfile
;
18422 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
18423 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
18424 LONGEST l
= DW_UNSND (attr
);
18426 if (bits
< sizeof (*value
) * 8)
18428 l
&= ((LONGEST
) 1 << bits
) - 1;
18431 else if (bits
== sizeof (*value
) * 8)
18435 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
18436 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
18443 /* Read a constant value from an attribute. Either set *VALUE, or if
18444 the value does not fit in *VALUE, set *BYTES - either already
18445 allocated on the objfile obstack, or newly allocated on OBSTACK,
18446 or, set *BATON, if we translated the constant to a location
18450 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
18451 const char *name
, struct obstack
*obstack
,
18452 struct dwarf2_cu
*cu
,
18453 LONGEST
*value
, const gdb_byte
**bytes
,
18454 struct dwarf2_locexpr_baton
**baton
)
18456 struct objfile
*objfile
= cu
->objfile
;
18457 struct comp_unit_head
*cu_header
= &cu
->header
;
18458 struct dwarf_block
*blk
;
18459 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
18460 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
18466 switch (attr
->form
)
18469 case DW_FORM_GNU_addr_index
:
18473 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
18474 dwarf2_const_value_length_mismatch_complaint (name
,
18475 cu_header
->addr_size
,
18476 TYPE_LENGTH (type
));
18477 /* Symbols of this form are reasonably rare, so we just
18478 piggyback on the existing location code rather than writing
18479 a new implementation of symbol_computed_ops. */
18480 *baton
= obstack_alloc (obstack
, sizeof (struct dwarf2_locexpr_baton
));
18481 (*baton
)->per_cu
= cu
->per_cu
;
18482 gdb_assert ((*baton
)->per_cu
);
18484 (*baton
)->size
= 2 + cu_header
->addr_size
;
18485 data
= obstack_alloc (obstack
, (*baton
)->size
);
18486 (*baton
)->data
= data
;
18488 data
[0] = DW_OP_addr
;
18489 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
18490 byte_order
, DW_ADDR (attr
));
18491 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
18494 case DW_FORM_string
:
18496 case DW_FORM_GNU_str_index
:
18497 case DW_FORM_GNU_strp_alt
:
18498 /* DW_STRING is already allocated on the objfile obstack, point
18500 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
18502 case DW_FORM_block1
:
18503 case DW_FORM_block2
:
18504 case DW_FORM_block4
:
18505 case DW_FORM_block
:
18506 case DW_FORM_exprloc
:
18507 blk
= DW_BLOCK (attr
);
18508 if (TYPE_LENGTH (type
) != blk
->size
)
18509 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
18510 TYPE_LENGTH (type
));
18511 *bytes
= blk
->data
;
18514 /* The DW_AT_const_value attributes are supposed to carry the
18515 symbol's value "represented as it would be on the target
18516 architecture." By the time we get here, it's already been
18517 converted to host endianness, so we just need to sign- or
18518 zero-extend it as appropriate. */
18519 case DW_FORM_data1
:
18520 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
18522 case DW_FORM_data2
:
18523 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
18525 case DW_FORM_data4
:
18526 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
18528 case DW_FORM_data8
:
18529 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
18532 case DW_FORM_sdata
:
18533 *value
= DW_SND (attr
);
18536 case DW_FORM_udata
:
18537 *value
= DW_UNSND (attr
);
18541 complaint (&symfile_complaints
,
18542 _("unsupported const value attribute form: '%s'"),
18543 dwarf_form_name (attr
->form
));
18550 /* Copy constant value from an attribute to a symbol. */
18553 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
18554 struct dwarf2_cu
*cu
)
18556 struct objfile
*objfile
= cu
->objfile
;
18557 struct comp_unit_head
*cu_header
= &cu
->header
;
18559 const gdb_byte
*bytes
;
18560 struct dwarf2_locexpr_baton
*baton
;
18562 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
18563 SYMBOL_PRINT_NAME (sym
),
18564 &objfile
->objfile_obstack
, cu
,
18565 &value
, &bytes
, &baton
);
18569 SYMBOL_LOCATION_BATON (sym
) = baton
;
18570 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
18572 else if (bytes
!= NULL
)
18574 SYMBOL_VALUE_BYTES (sym
) = bytes
;
18575 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
18579 SYMBOL_VALUE (sym
) = value
;
18580 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
18584 /* Return the type of the die in question using its DW_AT_type attribute. */
18586 static struct type
*
18587 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18589 struct attribute
*type_attr
;
18591 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
18594 /* A missing DW_AT_type represents a void type. */
18595 return objfile_type (cu
->objfile
)->builtin_void
;
18598 return lookup_die_type (die
, type_attr
, cu
);
18601 /* True iff CU's producer generates GNAT Ada auxiliary information
18602 that allows to find parallel types through that information instead
18603 of having to do expensive parallel lookups by type name. */
18606 need_gnat_info (struct dwarf2_cu
*cu
)
18608 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
18609 of GNAT produces this auxiliary information, without any indication
18610 that it is produced. Part of enhancing the FSF version of GNAT
18611 to produce that information will be to put in place an indicator
18612 that we can use in order to determine whether the descriptive type
18613 info is available or not. One suggestion that has been made is
18614 to use a new attribute, attached to the CU die. For now, assume
18615 that the descriptive type info is not available. */
18619 /* Return the auxiliary type of the die in question using its
18620 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
18621 attribute is not present. */
18623 static struct type
*
18624 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18626 struct attribute
*type_attr
;
18628 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
18632 return lookup_die_type (die
, type_attr
, cu
);
18635 /* If DIE has a descriptive_type attribute, then set the TYPE's
18636 descriptive type accordingly. */
18639 set_descriptive_type (struct type
*type
, struct die_info
*die
,
18640 struct dwarf2_cu
*cu
)
18642 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
18644 if (descriptive_type
)
18646 ALLOCATE_GNAT_AUX_TYPE (type
);
18647 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
18651 /* Return the containing type of the die in question using its
18652 DW_AT_containing_type attribute. */
18654 static struct type
*
18655 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18657 struct attribute
*type_attr
;
18659 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
18661 error (_("Dwarf Error: Problem turning containing type into gdb type "
18662 "[in module %s]"), objfile_name (cu
->objfile
));
18664 return lookup_die_type (die
, type_attr
, cu
);
18667 /* Return an error marker type to use for the ill formed type in DIE/CU. */
18669 static struct type
*
18670 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
18672 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18673 char *message
, *saved
;
18675 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
18676 objfile_name (objfile
),
18677 cu
->header
.offset
.sect_off
,
18678 die
->offset
.sect_off
);
18679 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
18680 message
, strlen (message
));
18683 return init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
18686 /* Look up the type of DIE in CU using its type attribute ATTR.
18687 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
18688 DW_AT_containing_type.
18689 If there is no type substitute an error marker. */
18691 static struct type
*
18692 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
18693 struct dwarf2_cu
*cu
)
18695 struct objfile
*objfile
= cu
->objfile
;
18696 struct type
*this_type
;
18698 gdb_assert (attr
->name
== DW_AT_type
18699 || attr
->name
== DW_AT_GNAT_descriptive_type
18700 || attr
->name
== DW_AT_containing_type
);
18702 /* First see if we have it cached. */
18704 if (attr
->form
== DW_FORM_GNU_ref_alt
)
18706 struct dwarf2_per_cu_data
*per_cu
;
18707 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18709 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
18710 this_type
= get_die_type_at_offset (offset
, per_cu
);
18712 else if (attr_form_is_ref (attr
))
18714 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
18716 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
18718 else if (attr
->form
== DW_FORM_ref_sig8
)
18720 ULONGEST signature
= DW_SIGNATURE (attr
);
18722 return get_signatured_type (die
, signature
, cu
);
18726 complaint (&symfile_complaints
,
18727 _("Dwarf Error: Bad type attribute %s in DIE"
18728 " at 0x%x [in module %s]"),
18729 dwarf_attr_name (attr
->name
), die
->offset
.sect_off
,
18730 objfile_name (objfile
));
18731 return build_error_marker_type (cu
, die
);
18734 /* If not cached we need to read it in. */
18736 if (this_type
== NULL
)
18738 struct die_info
*type_die
= NULL
;
18739 struct dwarf2_cu
*type_cu
= cu
;
18741 if (attr_form_is_ref (attr
))
18742 type_die
= follow_die_ref (die
, attr
, &type_cu
);
18743 if (type_die
== NULL
)
18744 return build_error_marker_type (cu
, die
);
18745 /* If we find the type now, it's probably because the type came
18746 from an inter-CU reference and the type's CU got expanded before
18748 this_type
= read_type_die (type_die
, type_cu
);
18751 /* If we still don't have a type use an error marker. */
18753 if (this_type
== NULL
)
18754 return build_error_marker_type (cu
, die
);
18759 /* Return the type in DIE, CU.
18760 Returns NULL for invalid types.
18762 This first does a lookup in die_type_hash,
18763 and only reads the die in if necessary.
18765 NOTE: This can be called when reading in partial or full symbols. */
18767 static struct type
*
18768 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
18770 struct type
*this_type
;
18772 this_type
= get_die_type (die
, cu
);
18776 return read_type_die_1 (die
, cu
);
18779 /* Read the type in DIE, CU.
18780 Returns NULL for invalid types. */
18782 static struct type
*
18783 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
18785 struct type
*this_type
= NULL
;
18789 case DW_TAG_class_type
:
18790 case DW_TAG_interface_type
:
18791 case DW_TAG_structure_type
:
18792 case DW_TAG_union_type
:
18793 this_type
= read_structure_type (die
, cu
);
18795 case DW_TAG_enumeration_type
:
18796 this_type
= read_enumeration_type (die
, cu
);
18798 case DW_TAG_subprogram
:
18799 case DW_TAG_subroutine_type
:
18800 case DW_TAG_inlined_subroutine
:
18801 this_type
= read_subroutine_type (die
, cu
);
18803 case DW_TAG_array_type
:
18804 this_type
= read_array_type (die
, cu
);
18806 case DW_TAG_set_type
:
18807 this_type
= read_set_type (die
, cu
);
18809 case DW_TAG_pointer_type
:
18810 this_type
= read_tag_pointer_type (die
, cu
);
18812 case DW_TAG_ptr_to_member_type
:
18813 this_type
= read_tag_ptr_to_member_type (die
, cu
);
18815 case DW_TAG_reference_type
:
18816 this_type
= read_tag_reference_type (die
, cu
);
18818 case DW_TAG_const_type
:
18819 this_type
= read_tag_const_type (die
, cu
);
18821 case DW_TAG_volatile_type
:
18822 this_type
= read_tag_volatile_type (die
, cu
);
18824 case DW_TAG_restrict_type
:
18825 this_type
= read_tag_restrict_type (die
, cu
);
18827 case DW_TAG_string_type
:
18828 this_type
= read_tag_string_type (die
, cu
);
18830 case DW_TAG_typedef
:
18831 this_type
= read_typedef (die
, cu
);
18833 case DW_TAG_subrange_type
:
18834 this_type
= read_subrange_type (die
, cu
);
18836 case DW_TAG_base_type
:
18837 this_type
= read_base_type (die
, cu
);
18839 case DW_TAG_unspecified_type
:
18840 this_type
= read_unspecified_type (die
, cu
);
18842 case DW_TAG_namespace
:
18843 this_type
= read_namespace_type (die
, cu
);
18845 case DW_TAG_module
:
18846 this_type
= read_module_type (die
, cu
);
18849 complaint (&symfile_complaints
,
18850 _("unexpected tag in read_type_die: '%s'"),
18851 dwarf_tag_name (die
->tag
));
18858 /* See if we can figure out if the class lives in a namespace. We do
18859 this by looking for a member function; its demangled name will
18860 contain namespace info, if there is any.
18861 Return the computed name or NULL.
18862 Space for the result is allocated on the objfile's obstack.
18863 This is the full-die version of guess_partial_die_structure_name.
18864 In this case we know DIE has no useful parent. */
18867 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
18869 struct die_info
*spec_die
;
18870 struct dwarf2_cu
*spec_cu
;
18871 struct die_info
*child
;
18874 spec_die
= die_specification (die
, &spec_cu
);
18875 if (spec_die
!= NULL
)
18881 for (child
= die
->child
;
18883 child
= child
->sibling
)
18885 if (child
->tag
== DW_TAG_subprogram
)
18887 struct attribute
*attr
;
18889 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
18891 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
18895 = language_class_name_from_physname (cu
->language_defn
,
18899 if (actual_name
!= NULL
)
18901 const char *die_name
= dwarf2_name (die
, cu
);
18903 if (die_name
!= NULL
18904 && strcmp (die_name
, actual_name
) != 0)
18906 /* Strip off the class name from the full name.
18907 We want the prefix. */
18908 int die_name_len
= strlen (die_name
);
18909 int actual_name_len
= strlen (actual_name
);
18911 /* Test for '::' as a sanity check. */
18912 if (actual_name_len
> die_name_len
+ 2
18913 && actual_name
[actual_name_len
18914 - die_name_len
- 1] == ':')
18916 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
18918 actual_name_len
- die_name_len
- 2);
18921 xfree (actual_name
);
18930 /* GCC might emit a nameless typedef that has a linkage name. Determine the
18931 prefix part in such case. See
18932 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18935 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18937 struct attribute
*attr
;
18940 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
18941 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
18944 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
18945 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
18948 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
18950 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
18951 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
18954 /* dwarf2_name had to be already called. */
18955 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
18957 /* Strip the base name, keep any leading namespaces/classes. */
18958 base
= strrchr (DW_STRING (attr
), ':');
18959 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
18962 return obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
18963 DW_STRING (attr
), &base
[-1] - DW_STRING (attr
));
18966 /* Return the name of the namespace/class that DIE is defined within,
18967 or "" if we can't tell. The caller should not xfree the result.
18969 For example, if we're within the method foo() in the following
18979 then determine_prefix on foo's die will return "N::C". */
18981 static const char *
18982 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
18984 struct die_info
*parent
, *spec_die
;
18985 struct dwarf2_cu
*spec_cu
;
18986 struct type
*parent_type
;
18989 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
18990 && cu
->language
!= language_fortran
)
18993 retval
= anonymous_struct_prefix (die
, cu
);
18997 /* We have to be careful in the presence of DW_AT_specification.
18998 For example, with GCC 3.4, given the code
19002 // Definition of N::foo.
19006 then we'll have a tree of DIEs like this:
19008 1: DW_TAG_compile_unit
19009 2: DW_TAG_namespace // N
19010 3: DW_TAG_subprogram // declaration of N::foo
19011 4: DW_TAG_subprogram // definition of N::foo
19012 DW_AT_specification // refers to die #3
19014 Thus, when processing die #4, we have to pretend that we're in
19015 the context of its DW_AT_specification, namely the contex of die
19018 spec_die
= die_specification (die
, &spec_cu
);
19019 if (spec_die
== NULL
)
19020 parent
= die
->parent
;
19023 parent
= spec_die
->parent
;
19027 if (parent
== NULL
)
19029 else if (parent
->building_fullname
)
19032 const char *parent_name
;
19034 /* It has been seen on RealView 2.2 built binaries,
19035 DW_TAG_template_type_param types actually _defined_ as
19036 children of the parent class:
19039 template class <class Enum> Class{};
19040 Class<enum E> class_e;
19042 1: DW_TAG_class_type (Class)
19043 2: DW_TAG_enumeration_type (E)
19044 3: DW_TAG_enumerator (enum1:0)
19045 3: DW_TAG_enumerator (enum2:1)
19047 2: DW_TAG_template_type_param
19048 DW_AT_type DW_FORM_ref_udata (E)
19050 Besides being broken debug info, it can put GDB into an
19051 infinite loop. Consider:
19053 When we're building the full name for Class<E>, we'll start
19054 at Class, and go look over its template type parameters,
19055 finding E. We'll then try to build the full name of E, and
19056 reach here. We're now trying to build the full name of E,
19057 and look over the parent DIE for containing scope. In the
19058 broken case, if we followed the parent DIE of E, we'd again
19059 find Class, and once again go look at its template type
19060 arguments, etc., etc. Simply don't consider such parent die
19061 as source-level parent of this die (it can't be, the language
19062 doesn't allow it), and break the loop here. */
19063 name
= dwarf2_name (die
, cu
);
19064 parent_name
= dwarf2_name (parent
, cu
);
19065 complaint (&symfile_complaints
,
19066 _("template param type '%s' defined within parent '%s'"),
19067 name
? name
: "<unknown>",
19068 parent_name
? parent_name
: "<unknown>");
19072 switch (parent
->tag
)
19074 case DW_TAG_namespace
:
19075 parent_type
= read_type_die (parent
, cu
);
19076 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
19077 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
19078 Work around this problem here. */
19079 if (cu
->language
== language_cplus
19080 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
19082 /* We give a name to even anonymous namespaces. */
19083 return TYPE_TAG_NAME (parent_type
);
19084 case DW_TAG_class_type
:
19085 case DW_TAG_interface_type
:
19086 case DW_TAG_structure_type
:
19087 case DW_TAG_union_type
:
19088 case DW_TAG_module
:
19089 parent_type
= read_type_die (parent
, cu
);
19090 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19091 return TYPE_TAG_NAME (parent_type
);
19093 /* An anonymous structure is only allowed non-static data
19094 members; no typedefs, no member functions, et cetera.
19095 So it does not need a prefix. */
19097 case DW_TAG_compile_unit
:
19098 case DW_TAG_partial_unit
:
19099 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
19100 if (cu
->language
== language_cplus
19101 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
19102 && die
->child
!= NULL
19103 && (die
->tag
== DW_TAG_class_type
19104 || die
->tag
== DW_TAG_structure_type
19105 || die
->tag
== DW_TAG_union_type
))
19107 char *name
= guess_full_die_structure_name (die
, cu
);
19112 case DW_TAG_enumeration_type
:
19113 parent_type
= read_type_die (parent
, cu
);
19114 if (TYPE_DECLARED_CLASS (parent_type
))
19116 if (TYPE_TAG_NAME (parent_type
) != NULL
)
19117 return TYPE_TAG_NAME (parent_type
);
19120 /* Fall through. */
19122 return determine_prefix (parent
, cu
);
19126 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
19127 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
19128 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
19129 an obconcat, otherwise allocate storage for the result. The CU argument is
19130 used to determine the language and hence, the appropriate separator. */
19132 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
19135 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
19136 int physname
, struct dwarf2_cu
*cu
)
19138 const char *lead
= "";
19141 if (suffix
== NULL
|| suffix
[0] == '\0'
19142 || prefix
== NULL
|| prefix
[0] == '\0')
19144 else if (cu
->language
== language_java
)
19146 else if (cu
->language
== language_fortran
&& physname
)
19148 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
19149 DW_AT_MIPS_linkage_name is preferred and used instead. */
19157 if (prefix
== NULL
)
19159 if (suffix
== NULL
)
19165 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
19167 strcpy (retval
, lead
);
19168 strcat (retval
, prefix
);
19169 strcat (retval
, sep
);
19170 strcat (retval
, suffix
);
19175 /* We have an obstack. */
19176 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
19180 /* Return sibling of die, NULL if no sibling. */
19182 static struct die_info
*
19183 sibling_die (struct die_info
*die
)
19185 return die
->sibling
;
19188 /* Get name of a die, return NULL if not found. */
19190 static const char *
19191 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
19192 struct obstack
*obstack
)
19194 if (name
&& cu
->language
== language_cplus
)
19196 char *canon_name
= cp_canonicalize_string (name
);
19198 if (canon_name
!= NULL
)
19200 if (strcmp (canon_name
, name
) != 0)
19201 name
= obstack_copy0 (obstack
, canon_name
, strlen (canon_name
));
19202 xfree (canon_name
);
19209 /* Get name of a die, return NULL if not found. */
19211 static const char *
19212 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19214 struct attribute
*attr
;
19216 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
19217 if ((!attr
|| !DW_STRING (attr
))
19218 && die
->tag
!= DW_TAG_class_type
19219 && die
->tag
!= DW_TAG_interface_type
19220 && die
->tag
!= DW_TAG_structure_type
19221 && die
->tag
!= DW_TAG_union_type
)
19226 case DW_TAG_compile_unit
:
19227 case DW_TAG_partial_unit
:
19228 /* Compilation units have a DW_AT_name that is a filename, not
19229 a source language identifier. */
19230 case DW_TAG_enumeration_type
:
19231 case DW_TAG_enumerator
:
19232 /* These tags always have simple identifiers already; no need
19233 to canonicalize them. */
19234 return DW_STRING (attr
);
19236 case DW_TAG_subprogram
:
19237 /* Java constructors will all be named "<init>", so return
19238 the class name when we see this special case. */
19239 if (cu
->language
== language_java
19240 && DW_STRING (attr
) != NULL
19241 && strcmp (DW_STRING (attr
), "<init>") == 0)
19243 struct dwarf2_cu
*spec_cu
= cu
;
19244 struct die_info
*spec_die
;
19246 /* GCJ will output '<init>' for Java constructor names.
19247 For this special case, return the name of the parent class. */
19249 /* GCJ may output subprogram DIEs with AT_specification set.
19250 If so, use the name of the specified DIE. */
19251 spec_die
= die_specification (die
, &spec_cu
);
19252 if (spec_die
!= NULL
)
19253 return dwarf2_name (spec_die
, spec_cu
);
19258 if (die
->tag
== DW_TAG_class_type
)
19259 return dwarf2_name (die
, cu
);
19261 while (die
->tag
!= DW_TAG_compile_unit
19262 && die
->tag
!= DW_TAG_partial_unit
);
19266 case DW_TAG_class_type
:
19267 case DW_TAG_interface_type
:
19268 case DW_TAG_structure_type
:
19269 case DW_TAG_union_type
:
19270 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
19271 structures or unions. These were of the form "._%d" in GCC 4.1,
19272 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
19273 and GCC 4.4. We work around this problem by ignoring these. */
19274 if (attr
&& DW_STRING (attr
)
19275 && (strncmp (DW_STRING (attr
), "._", 2) == 0
19276 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
19279 /* GCC might emit a nameless typedef that has a linkage name. See
19280 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19281 if (!attr
|| DW_STRING (attr
) == NULL
)
19283 char *demangled
= NULL
;
19285 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
19287 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
19289 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
19292 /* Avoid demangling DW_STRING (attr) the second time on a second
19293 call for the same DIE. */
19294 if (!DW_STRING_IS_CANONICAL (attr
))
19295 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
19301 /* FIXME: we already did this for the partial symbol... */
19303 = obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
19304 demangled
, strlen (demangled
));
19305 DW_STRING_IS_CANONICAL (attr
) = 1;
19308 /* Strip any leading namespaces/classes, keep only the base name.
19309 DW_AT_name for named DIEs does not contain the prefixes. */
19310 base
= strrchr (DW_STRING (attr
), ':');
19311 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
19314 return DW_STRING (attr
);
19323 if (!DW_STRING_IS_CANONICAL (attr
))
19326 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
19327 &cu
->objfile
->per_bfd
->storage_obstack
);
19328 DW_STRING_IS_CANONICAL (attr
) = 1;
19330 return DW_STRING (attr
);
19333 /* Return the die that this die in an extension of, or NULL if there
19334 is none. *EXT_CU is the CU containing DIE on input, and the CU
19335 containing the return value on output. */
19337 static struct die_info
*
19338 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
19340 struct attribute
*attr
;
19342 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
19346 return follow_die_ref (die
, attr
, ext_cu
);
19349 /* Convert a DIE tag into its string name. */
19351 static const char *
19352 dwarf_tag_name (unsigned tag
)
19354 const char *name
= get_DW_TAG_name (tag
);
19357 return "DW_TAG_<unknown>";
19362 /* Convert a DWARF attribute code into its string name. */
19364 static const char *
19365 dwarf_attr_name (unsigned attr
)
19369 #ifdef MIPS /* collides with DW_AT_HP_block_index */
19370 if (attr
== DW_AT_MIPS_fde
)
19371 return "DW_AT_MIPS_fde";
19373 if (attr
== DW_AT_HP_block_index
)
19374 return "DW_AT_HP_block_index";
19377 name
= get_DW_AT_name (attr
);
19380 return "DW_AT_<unknown>";
19385 /* Convert a DWARF value form code into its string name. */
19387 static const char *
19388 dwarf_form_name (unsigned form
)
19390 const char *name
= get_DW_FORM_name (form
);
19393 return "DW_FORM_<unknown>";
19399 dwarf_bool_name (unsigned mybool
)
19407 /* Convert a DWARF type code into its string name. */
19409 static const char *
19410 dwarf_type_encoding_name (unsigned enc
)
19412 const char *name
= get_DW_ATE_name (enc
);
19415 return "DW_ATE_<unknown>";
19421 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
19425 print_spaces (indent
, f
);
19426 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
19427 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
19429 if (die
->parent
!= NULL
)
19431 print_spaces (indent
, f
);
19432 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
19433 die
->parent
->offset
.sect_off
);
19436 print_spaces (indent
, f
);
19437 fprintf_unfiltered (f
, " has children: %s\n",
19438 dwarf_bool_name (die
->child
!= NULL
));
19440 print_spaces (indent
, f
);
19441 fprintf_unfiltered (f
, " attributes:\n");
19443 for (i
= 0; i
< die
->num_attrs
; ++i
)
19445 print_spaces (indent
, f
);
19446 fprintf_unfiltered (f
, " %s (%s) ",
19447 dwarf_attr_name (die
->attrs
[i
].name
),
19448 dwarf_form_name (die
->attrs
[i
].form
));
19450 switch (die
->attrs
[i
].form
)
19453 case DW_FORM_GNU_addr_index
:
19454 fprintf_unfiltered (f
, "address: ");
19455 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
19457 case DW_FORM_block2
:
19458 case DW_FORM_block4
:
19459 case DW_FORM_block
:
19460 case DW_FORM_block1
:
19461 fprintf_unfiltered (f
, "block: size %s",
19462 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19464 case DW_FORM_exprloc
:
19465 fprintf_unfiltered (f
, "expression: size %s",
19466 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
19468 case DW_FORM_ref_addr
:
19469 fprintf_unfiltered (f
, "ref address: ");
19470 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19472 case DW_FORM_GNU_ref_alt
:
19473 fprintf_unfiltered (f
, "alt ref address: ");
19474 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
19480 case DW_FORM_ref_udata
:
19481 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
19482 (long) (DW_UNSND (&die
->attrs
[i
])));
19484 case DW_FORM_data1
:
19485 case DW_FORM_data2
:
19486 case DW_FORM_data4
:
19487 case DW_FORM_data8
:
19488 case DW_FORM_udata
:
19489 case DW_FORM_sdata
:
19490 fprintf_unfiltered (f
, "constant: %s",
19491 pulongest (DW_UNSND (&die
->attrs
[i
])));
19493 case DW_FORM_sec_offset
:
19494 fprintf_unfiltered (f
, "section offset: %s",
19495 pulongest (DW_UNSND (&die
->attrs
[i
])));
19497 case DW_FORM_ref_sig8
:
19498 fprintf_unfiltered (f
, "signature: %s",
19499 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
19501 case DW_FORM_string
:
19503 case DW_FORM_GNU_str_index
:
19504 case DW_FORM_GNU_strp_alt
:
19505 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
19506 DW_STRING (&die
->attrs
[i
])
19507 ? DW_STRING (&die
->attrs
[i
]) : "",
19508 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
19511 if (DW_UNSND (&die
->attrs
[i
]))
19512 fprintf_unfiltered (f
, "flag: TRUE");
19514 fprintf_unfiltered (f
, "flag: FALSE");
19516 case DW_FORM_flag_present
:
19517 fprintf_unfiltered (f
, "flag: TRUE");
19519 case DW_FORM_indirect
:
19520 /* The reader will have reduced the indirect form to
19521 the "base form" so this form should not occur. */
19522 fprintf_unfiltered (f
,
19523 "unexpected attribute form: DW_FORM_indirect");
19526 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
19527 die
->attrs
[i
].form
);
19530 fprintf_unfiltered (f
, "\n");
19535 dump_die_for_error (struct die_info
*die
)
19537 dump_die_shallow (gdb_stderr
, 0, die
);
19541 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
19543 int indent
= level
* 4;
19545 gdb_assert (die
!= NULL
);
19547 if (level
>= max_level
)
19550 dump_die_shallow (f
, indent
, die
);
19552 if (die
->child
!= NULL
)
19554 print_spaces (indent
, f
);
19555 fprintf_unfiltered (f
, " Children:");
19556 if (level
+ 1 < max_level
)
19558 fprintf_unfiltered (f
, "\n");
19559 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
19563 fprintf_unfiltered (f
,
19564 " [not printed, max nesting level reached]\n");
19568 if (die
->sibling
!= NULL
&& level
> 0)
19570 dump_die_1 (f
, level
, max_level
, die
->sibling
);
19574 /* This is called from the pdie macro in gdbinit.in.
19575 It's not static so gcc will keep a copy callable from gdb. */
19578 dump_die (struct die_info
*die
, int max_level
)
19580 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
19584 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
19588 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
19594 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
19598 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
19600 sect_offset retval
= { DW_UNSND (attr
) };
19602 if (attr_form_is_ref (attr
))
19605 retval
.sect_off
= 0;
19606 complaint (&symfile_complaints
,
19607 _("unsupported die ref attribute form: '%s'"),
19608 dwarf_form_name (attr
->form
));
19612 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
19613 * the value held by the attribute is not constant. */
19616 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
19618 if (attr
->form
== DW_FORM_sdata
)
19619 return DW_SND (attr
);
19620 else if (attr
->form
== DW_FORM_udata
19621 || attr
->form
== DW_FORM_data1
19622 || attr
->form
== DW_FORM_data2
19623 || attr
->form
== DW_FORM_data4
19624 || attr
->form
== DW_FORM_data8
)
19625 return DW_UNSND (attr
);
19628 complaint (&symfile_complaints
,
19629 _("Attribute value is not a constant (%s)"),
19630 dwarf_form_name (attr
->form
));
19631 return default_value
;
19635 /* Follow reference or signature attribute ATTR of SRC_DIE.
19636 On entry *REF_CU is the CU of SRC_DIE.
19637 On exit *REF_CU is the CU of the result. */
19639 static struct die_info
*
19640 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
19641 struct dwarf2_cu
**ref_cu
)
19643 struct die_info
*die
;
19645 if (attr_form_is_ref (attr
))
19646 die
= follow_die_ref (src_die
, attr
, ref_cu
);
19647 else if (attr
->form
== DW_FORM_ref_sig8
)
19648 die
= follow_die_sig (src_die
, attr
, ref_cu
);
19651 dump_die_for_error (src_die
);
19652 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
19653 objfile_name ((*ref_cu
)->objfile
));
19659 /* Follow reference OFFSET.
19660 On entry *REF_CU is the CU of the source die referencing OFFSET.
19661 On exit *REF_CU is the CU of the result.
19662 Returns NULL if OFFSET is invalid. */
19664 static struct die_info
*
19665 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
19666 struct dwarf2_cu
**ref_cu
)
19668 struct die_info temp_die
;
19669 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
19671 gdb_assert (cu
->per_cu
!= NULL
);
19675 if (cu
->per_cu
->is_debug_types
)
19677 /* .debug_types CUs cannot reference anything outside their CU.
19678 If they need to, they have to reference a signatured type via
19679 DW_FORM_ref_sig8. */
19680 if (! offset_in_cu_p (&cu
->header
, offset
))
19683 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
19684 || ! offset_in_cu_p (&cu
->header
, offset
))
19686 struct dwarf2_per_cu_data
*per_cu
;
19688 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
19691 /* If necessary, add it to the queue and load its DIEs. */
19692 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
19693 load_full_comp_unit (per_cu
, cu
->language
);
19695 target_cu
= per_cu
->cu
;
19697 else if (cu
->dies
== NULL
)
19699 /* We're loading full DIEs during partial symbol reading. */
19700 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
19701 load_full_comp_unit (cu
->per_cu
, language_minimal
);
19704 *ref_cu
= target_cu
;
19705 temp_die
.offset
= offset
;
19706 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
19709 /* Follow reference attribute ATTR of SRC_DIE.
19710 On entry *REF_CU is the CU of SRC_DIE.
19711 On exit *REF_CU is the CU of the result. */
19713 static struct die_info
*
19714 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
19715 struct dwarf2_cu
**ref_cu
)
19717 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
19718 struct dwarf2_cu
*cu
= *ref_cu
;
19719 struct die_info
*die
;
19721 die
= follow_die_offset (offset
,
19722 (attr
->form
== DW_FORM_GNU_ref_alt
19723 || cu
->per_cu
->is_dwz
),
19726 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
19727 "at 0x%x [in module %s]"),
19728 offset
.sect_off
, src_die
->offset
.sect_off
,
19729 objfile_name (cu
->objfile
));
19734 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
19735 Returned value is intended for DW_OP_call*. Returned
19736 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
19738 struct dwarf2_locexpr_baton
19739 dwarf2_fetch_die_loc_sect_off (sect_offset offset
,
19740 struct dwarf2_per_cu_data
*per_cu
,
19741 CORE_ADDR (*get_frame_pc
) (void *baton
),
19744 struct dwarf2_cu
*cu
;
19745 struct die_info
*die
;
19746 struct attribute
*attr
;
19747 struct dwarf2_locexpr_baton retval
;
19749 dw2_setup (per_cu
->objfile
);
19751 if (per_cu
->cu
== NULL
)
19755 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19757 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19758 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19760 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19763 /* DWARF: "If there is no such attribute, then there is no effect.".
19764 DATA is ignored if SIZE is 0. */
19766 retval
.data
= NULL
;
19769 else if (attr_form_is_section_offset (attr
))
19771 struct dwarf2_loclist_baton loclist_baton
;
19772 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
19775 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
19777 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
19779 retval
.size
= size
;
19783 if (!attr_form_is_block (attr
))
19784 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
19785 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
19786 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19788 retval
.data
= DW_BLOCK (attr
)->data
;
19789 retval
.size
= DW_BLOCK (attr
)->size
;
19791 retval
.per_cu
= cu
->per_cu
;
19793 age_cached_comp_units ();
19798 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
19801 struct dwarf2_locexpr_baton
19802 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
19803 struct dwarf2_per_cu_data
*per_cu
,
19804 CORE_ADDR (*get_frame_pc
) (void *baton
),
19807 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
19809 return dwarf2_fetch_die_loc_sect_off (offset
, per_cu
, get_frame_pc
, baton
);
19812 /* Write a constant of a given type as target-ordered bytes into
19815 static const gdb_byte
*
19816 write_constant_as_bytes (struct obstack
*obstack
,
19817 enum bfd_endian byte_order
,
19824 *len
= TYPE_LENGTH (type
);
19825 result
= obstack_alloc (obstack
, *len
);
19826 store_unsigned_integer (result
, *len
, byte_order
, value
);
19831 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
19832 pointer to the constant bytes and set LEN to the length of the
19833 data. If memory is needed, allocate it on OBSTACK. If the DIE
19834 does not have a DW_AT_const_value, return NULL. */
19837 dwarf2_fetch_constant_bytes (sect_offset offset
,
19838 struct dwarf2_per_cu_data
*per_cu
,
19839 struct obstack
*obstack
,
19842 struct dwarf2_cu
*cu
;
19843 struct die_info
*die
;
19844 struct attribute
*attr
;
19845 const gdb_byte
*result
= NULL
;
19848 enum bfd_endian byte_order
;
19850 dw2_setup (per_cu
->objfile
);
19852 if (per_cu
->cu
== NULL
)
19856 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
19858 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
19859 offset
.sect_off
, objfile_name (per_cu
->objfile
));
19862 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19866 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
19867 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19869 switch (attr
->form
)
19872 case DW_FORM_GNU_addr_index
:
19876 *len
= cu
->header
.addr_size
;
19877 tem
= obstack_alloc (obstack
, *len
);
19878 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
19882 case DW_FORM_string
:
19884 case DW_FORM_GNU_str_index
:
19885 case DW_FORM_GNU_strp_alt
:
19886 /* DW_STRING is already allocated on the objfile obstack, point
19888 result
= (const gdb_byte
*) DW_STRING (attr
);
19889 *len
= strlen (DW_STRING (attr
));
19891 case DW_FORM_block1
:
19892 case DW_FORM_block2
:
19893 case DW_FORM_block4
:
19894 case DW_FORM_block
:
19895 case DW_FORM_exprloc
:
19896 result
= DW_BLOCK (attr
)->data
;
19897 *len
= DW_BLOCK (attr
)->size
;
19900 /* The DW_AT_const_value attributes are supposed to carry the
19901 symbol's value "represented as it would be on the target
19902 architecture." By the time we get here, it's already been
19903 converted to host endianness, so we just need to sign- or
19904 zero-extend it as appropriate. */
19905 case DW_FORM_data1
:
19906 type
= die_type (die
, cu
);
19907 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
19908 if (result
== NULL
)
19909 result
= write_constant_as_bytes (obstack
, byte_order
,
19912 case DW_FORM_data2
:
19913 type
= die_type (die
, cu
);
19914 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
19915 if (result
== NULL
)
19916 result
= write_constant_as_bytes (obstack
, byte_order
,
19919 case DW_FORM_data4
:
19920 type
= die_type (die
, cu
);
19921 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
19922 if (result
== NULL
)
19923 result
= write_constant_as_bytes (obstack
, byte_order
,
19926 case DW_FORM_data8
:
19927 type
= die_type (die
, cu
);
19928 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
19929 if (result
== NULL
)
19930 result
= write_constant_as_bytes (obstack
, byte_order
,
19934 case DW_FORM_sdata
:
19935 type
= die_type (die
, cu
);
19936 result
= write_constant_as_bytes (obstack
, byte_order
,
19937 type
, DW_SND (attr
), len
);
19940 case DW_FORM_udata
:
19941 type
= die_type (die
, cu
);
19942 result
= write_constant_as_bytes (obstack
, byte_order
,
19943 type
, DW_UNSND (attr
), len
);
19947 complaint (&symfile_complaints
,
19948 _("unsupported const value attribute form: '%s'"),
19949 dwarf_form_name (attr
->form
));
19956 /* Return the type of the DIE at DIE_OFFSET in the CU named by
19960 dwarf2_get_die_type (cu_offset die_offset
,
19961 struct dwarf2_per_cu_data
*per_cu
)
19963 sect_offset die_offset_sect
;
19965 dw2_setup (per_cu
->objfile
);
19967 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
19968 return get_die_type_at_offset (die_offset_sect
, per_cu
);
19971 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
19972 On entry *REF_CU is the CU of SRC_DIE.
19973 On exit *REF_CU is the CU of the result.
19974 Returns NULL if the referenced DIE isn't found. */
19976 static struct die_info
*
19977 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
19978 struct dwarf2_cu
**ref_cu
)
19980 struct objfile
*objfile
= (*ref_cu
)->objfile
;
19981 struct die_info temp_die
;
19982 struct dwarf2_cu
*sig_cu
;
19983 struct die_info
*die
;
19985 /* While it might be nice to assert sig_type->type == NULL here,
19986 we can get here for DW_AT_imported_declaration where we need
19987 the DIE not the type. */
19989 /* If necessary, add it to the queue and load its DIEs. */
19991 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
19992 read_signatured_type (sig_type
);
19994 sig_cu
= sig_type
->per_cu
.cu
;
19995 gdb_assert (sig_cu
!= NULL
);
19996 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
19997 temp_die
.offset
= sig_type
->type_offset_in_section
;
19998 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
19999 temp_die
.offset
.sect_off
);
20002 /* For .gdb_index version 7 keep track of included TUs.
20003 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
20004 if (dwarf2_per_objfile
->index_table
!= NULL
20005 && dwarf2_per_objfile
->index_table
->version
<= 7)
20007 VEC_safe_push (dwarf2_per_cu_ptr
,
20008 (*ref_cu
)->per_cu
->imported_symtabs
,
20019 /* Follow signatured type referenced by ATTR in SRC_DIE.
20020 On entry *REF_CU is the CU of SRC_DIE.
20021 On exit *REF_CU is the CU of the result.
20022 The result is the DIE of the type.
20023 If the referenced type cannot be found an error is thrown. */
20025 static struct die_info
*
20026 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20027 struct dwarf2_cu
**ref_cu
)
20029 ULONGEST signature
= DW_SIGNATURE (attr
);
20030 struct signatured_type
*sig_type
;
20031 struct die_info
*die
;
20033 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
20035 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
20036 /* sig_type will be NULL if the signatured type is missing from
20038 if (sig_type
== NULL
)
20040 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
20041 " from DIE at 0x%x [in module %s]"),
20042 hex_string (signature
), src_die
->offset
.sect_off
,
20043 objfile_name ((*ref_cu
)->objfile
));
20046 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
20049 dump_die_for_error (src_die
);
20050 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
20051 " from DIE at 0x%x [in module %s]"),
20052 hex_string (signature
), src_die
->offset
.sect_off
,
20053 objfile_name ((*ref_cu
)->objfile
));
20059 /* Get the type specified by SIGNATURE referenced in DIE/CU,
20060 reading in and processing the type unit if necessary. */
20062 static struct type
*
20063 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
20064 struct dwarf2_cu
*cu
)
20066 struct signatured_type
*sig_type
;
20067 struct dwarf2_cu
*type_cu
;
20068 struct die_info
*type_die
;
20071 sig_type
= lookup_signatured_type (cu
, signature
);
20072 /* sig_type will be NULL if the signatured type is missing from
20074 if (sig_type
== NULL
)
20076 complaint (&symfile_complaints
,
20077 _("Dwarf Error: Cannot find signatured DIE %s referenced"
20078 " from DIE at 0x%x [in module %s]"),
20079 hex_string (signature
), die
->offset
.sect_off
,
20080 objfile_name (dwarf2_per_objfile
->objfile
));
20081 return build_error_marker_type (cu
, die
);
20084 /* If we already know the type we're done. */
20085 if (sig_type
->type
!= NULL
)
20086 return sig_type
->type
;
20089 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
20090 if (type_die
!= NULL
)
20092 /* N.B. We need to call get_die_type to ensure only one type for this DIE
20093 is created. This is important, for example, because for c++ classes
20094 we need TYPE_NAME set which is only done by new_symbol. Blech. */
20095 type
= read_type_die (type_die
, type_cu
);
20098 complaint (&symfile_complaints
,
20099 _("Dwarf Error: Cannot build signatured type %s"
20100 " referenced from DIE at 0x%x [in module %s]"),
20101 hex_string (signature
), die
->offset
.sect_off
,
20102 objfile_name (dwarf2_per_objfile
->objfile
));
20103 type
= build_error_marker_type (cu
, die
);
20108 complaint (&symfile_complaints
,
20109 _("Dwarf Error: Problem reading signatured DIE %s referenced"
20110 " from DIE at 0x%x [in module %s]"),
20111 hex_string (signature
), die
->offset
.sect_off
,
20112 objfile_name (dwarf2_per_objfile
->objfile
));
20113 type
= build_error_marker_type (cu
, die
);
20115 sig_type
->type
= type
;
20120 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
20121 reading in and processing the type unit if necessary. */
20123 static struct type
*
20124 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
20125 struct dwarf2_cu
*cu
) /* ARI: editCase function */
20127 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
20128 if (attr_form_is_ref (attr
))
20130 struct dwarf2_cu
*type_cu
= cu
;
20131 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
20133 return read_type_die (type_die
, type_cu
);
20135 else if (attr
->form
== DW_FORM_ref_sig8
)
20137 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
20141 complaint (&symfile_complaints
,
20142 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
20143 " at 0x%x [in module %s]"),
20144 dwarf_form_name (attr
->form
), die
->offset
.sect_off
,
20145 objfile_name (dwarf2_per_objfile
->objfile
));
20146 return build_error_marker_type (cu
, die
);
20150 /* Load the DIEs associated with type unit PER_CU into memory. */
20153 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
20155 struct signatured_type
*sig_type
;
20157 /* Caller is responsible for ensuring type_unit_groups don't get here. */
20158 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
20160 /* We have the per_cu, but we need the signatured_type.
20161 Fortunately this is an easy translation. */
20162 gdb_assert (per_cu
->is_debug_types
);
20163 sig_type
= (struct signatured_type
*) per_cu
;
20165 gdb_assert (per_cu
->cu
== NULL
);
20167 read_signatured_type (sig_type
);
20169 gdb_assert (per_cu
->cu
!= NULL
);
20172 /* die_reader_func for read_signatured_type.
20173 This is identical to load_full_comp_unit_reader,
20174 but is kept separate for now. */
20177 read_signatured_type_reader (const struct die_reader_specs
*reader
,
20178 const gdb_byte
*info_ptr
,
20179 struct die_info
*comp_unit_die
,
20183 struct dwarf2_cu
*cu
= reader
->cu
;
20185 gdb_assert (cu
->die_hash
== NULL
);
20187 htab_create_alloc_ex (cu
->header
.length
/ 12,
20191 &cu
->comp_unit_obstack
,
20192 hashtab_obstack_allocate
,
20193 dummy_obstack_deallocate
);
20196 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
20197 &info_ptr
, comp_unit_die
);
20198 cu
->dies
= comp_unit_die
;
20199 /* comp_unit_die is not stored in die_hash, no need. */
20201 /* We try not to read any attributes in this function, because not
20202 all CUs needed for references have been loaded yet, and symbol
20203 table processing isn't initialized. But we have to set the CU language,
20204 or we won't be able to build types correctly.
20205 Similarly, if we do not read the producer, we can not apply
20206 producer-specific interpretation. */
20207 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
20210 /* Read in a signatured type and build its CU and DIEs.
20211 If the type is a stub for the real type in a DWO file,
20212 read in the real type from the DWO file as well. */
20215 read_signatured_type (struct signatured_type
*sig_type
)
20217 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
20219 gdb_assert (per_cu
->is_debug_types
);
20220 gdb_assert (per_cu
->cu
== NULL
);
20222 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
20223 read_signatured_type_reader
, NULL
);
20224 sig_type
->per_cu
.tu_read
= 1;
20227 /* Decode simple location descriptions.
20228 Given a pointer to a dwarf block that defines a location, compute
20229 the location and return the value.
20231 NOTE drow/2003-11-18: This function is called in two situations
20232 now: for the address of static or global variables (partial symbols
20233 only) and for offsets into structures which are expected to be
20234 (more or less) constant. The partial symbol case should go away,
20235 and only the constant case should remain. That will let this
20236 function complain more accurately. A few special modes are allowed
20237 without complaint for global variables (for instance, global
20238 register values and thread-local values).
20240 A location description containing no operations indicates that the
20241 object is optimized out. The return value is 0 for that case.
20242 FIXME drow/2003-11-16: No callers check for this case any more; soon all
20243 callers will only want a very basic result and this can become a
20246 Note that stack[0] is unused except as a default error return. */
20249 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
20251 struct objfile
*objfile
= cu
->objfile
;
20253 size_t size
= blk
->size
;
20254 const gdb_byte
*data
= blk
->data
;
20255 CORE_ADDR stack
[64];
20257 unsigned int bytes_read
, unsnd
;
20263 stack
[++stacki
] = 0;
20302 stack
[++stacki
] = op
- DW_OP_lit0
;
20337 stack
[++stacki
] = op
- DW_OP_reg0
;
20339 dwarf2_complex_location_expr_complaint ();
20343 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
20345 stack
[++stacki
] = unsnd
;
20347 dwarf2_complex_location_expr_complaint ();
20351 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
20356 case DW_OP_const1u
:
20357 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
20361 case DW_OP_const1s
:
20362 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
20366 case DW_OP_const2u
:
20367 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
20371 case DW_OP_const2s
:
20372 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
20376 case DW_OP_const4u
:
20377 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
20381 case DW_OP_const4s
:
20382 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
20386 case DW_OP_const8u
:
20387 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
20392 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
20398 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
20403 stack
[stacki
+ 1] = stack
[stacki
];
20408 stack
[stacki
- 1] += stack
[stacki
];
20412 case DW_OP_plus_uconst
:
20413 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
20419 stack
[stacki
- 1] -= stack
[stacki
];
20424 /* If we're not the last op, then we definitely can't encode
20425 this using GDB's address_class enum. This is valid for partial
20426 global symbols, although the variable's address will be bogus
20429 dwarf2_complex_location_expr_complaint ();
20432 case DW_OP_GNU_push_tls_address
:
20433 /* The top of the stack has the offset from the beginning
20434 of the thread control block at which the variable is located. */
20435 /* Nothing should follow this operator, so the top of stack would
20437 /* This is valid for partial global symbols, but the variable's
20438 address will be bogus in the psymtab. Make it always at least
20439 non-zero to not look as a variable garbage collected by linker
20440 which have DW_OP_addr 0. */
20442 dwarf2_complex_location_expr_complaint ();
20446 case DW_OP_GNU_uninit
:
20449 case DW_OP_GNU_addr_index
:
20450 case DW_OP_GNU_const_index
:
20451 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
20458 const char *name
= get_DW_OP_name (op
);
20461 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
20464 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
20468 return (stack
[stacki
]);
20471 /* Enforce maximum stack depth of SIZE-1 to avoid writing
20472 outside of the allocated space. Also enforce minimum>0. */
20473 if (stacki
>= ARRAY_SIZE (stack
) - 1)
20475 complaint (&symfile_complaints
,
20476 _("location description stack overflow"));
20482 complaint (&symfile_complaints
,
20483 _("location description stack underflow"));
20487 return (stack
[stacki
]);
20490 /* memory allocation interface */
20492 static struct dwarf_block
*
20493 dwarf_alloc_block (struct dwarf2_cu
*cu
)
20495 struct dwarf_block
*blk
;
20497 blk
= (struct dwarf_block
*)
20498 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
20502 static struct die_info
*
20503 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
20505 struct die_info
*die
;
20506 size_t size
= sizeof (struct die_info
);
20509 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
20511 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
20512 memset (die
, 0, sizeof (struct die_info
));
20517 /* Macro support. */
20519 /* Return file name relative to the compilation directory of file number I in
20520 *LH's file name table. The result is allocated using xmalloc; the caller is
20521 responsible for freeing it. */
20524 file_file_name (int file
, struct line_header
*lh
)
20526 /* Is the file number a valid index into the line header's file name
20527 table? Remember that file numbers start with one, not zero. */
20528 if (1 <= file
&& file
<= lh
->num_file_names
)
20530 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
20532 if (IS_ABSOLUTE_PATH (fe
->name
) || fe
->dir_index
== 0)
20533 return xstrdup (fe
->name
);
20534 return concat (lh
->include_dirs
[fe
->dir_index
- 1], SLASH_STRING
,
20539 /* The compiler produced a bogus file number. We can at least
20540 record the macro definitions made in the file, even if we
20541 won't be able to find the file by name. */
20542 char fake_name
[80];
20544 xsnprintf (fake_name
, sizeof (fake_name
),
20545 "<bad macro file number %d>", file
);
20547 complaint (&symfile_complaints
,
20548 _("bad file number in macro information (%d)"),
20551 return xstrdup (fake_name
);
20555 /* Return the full name of file number I in *LH's file name table.
20556 Use COMP_DIR as the name of the current directory of the
20557 compilation. The result is allocated using xmalloc; the caller is
20558 responsible for freeing it. */
20560 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
20562 /* Is the file number a valid index into the line header's file name
20563 table? Remember that file numbers start with one, not zero. */
20564 if (1 <= file
&& file
<= lh
->num_file_names
)
20566 char *relative
= file_file_name (file
, lh
);
20568 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
20570 return reconcat (relative
, comp_dir
, SLASH_STRING
, relative
, NULL
);
20573 return file_file_name (file
, lh
);
20577 static struct macro_source_file
*
20578 macro_start_file (int file
, int line
,
20579 struct macro_source_file
*current_file
,
20580 struct line_header
*lh
)
20582 /* File name relative to the compilation directory of this source file. */
20583 char *file_name
= file_file_name (file
, lh
);
20585 if (! current_file
)
20587 /* Note: We don't create a macro table for this compilation unit
20588 at all until we actually get a filename. */
20589 struct macro_table
*macro_table
= get_macro_table ();
20591 /* If we have no current file, then this must be the start_file
20592 directive for the compilation unit's main source file. */
20593 current_file
= macro_set_main (macro_table
, file_name
);
20594 macro_define_special (macro_table
);
20597 current_file
= macro_include (current_file
, line
, file_name
);
20601 return current_file
;
20605 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
20606 followed by a null byte. */
20608 copy_string (const char *buf
, int len
)
20610 char *s
= xmalloc (len
+ 1);
20612 memcpy (s
, buf
, len
);
20618 static const char *
20619 consume_improper_spaces (const char *p
, const char *body
)
20623 complaint (&symfile_complaints
,
20624 _("macro definition contains spaces "
20625 "in formal argument list:\n`%s'"),
20637 parse_macro_definition (struct macro_source_file
*file
, int line
,
20642 /* The body string takes one of two forms. For object-like macro
20643 definitions, it should be:
20645 <macro name> " " <definition>
20647 For function-like macro definitions, it should be:
20649 <macro name> "() " <definition>
20651 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
20653 Spaces may appear only where explicitly indicated, and in the
20656 The Dwarf 2 spec says that an object-like macro's name is always
20657 followed by a space, but versions of GCC around March 2002 omit
20658 the space when the macro's definition is the empty string.
20660 The Dwarf 2 spec says that there should be no spaces between the
20661 formal arguments in a function-like macro's formal argument list,
20662 but versions of GCC around March 2002 include spaces after the
20666 /* Find the extent of the macro name. The macro name is terminated
20667 by either a space or null character (for an object-like macro) or
20668 an opening paren (for a function-like macro). */
20669 for (p
= body
; *p
; p
++)
20670 if (*p
== ' ' || *p
== '(')
20673 if (*p
== ' ' || *p
== '\0')
20675 /* It's an object-like macro. */
20676 int name_len
= p
- body
;
20677 char *name
= copy_string (body
, name_len
);
20678 const char *replacement
;
20681 replacement
= body
+ name_len
+ 1;
20684 dwarf2_macro_malformed_definition_complaint (body
);
20685 replacement
= body
+ name_len
;
20688 macro_define_object (file
, line
, name
, replacement
);
20692 else if (*p
== '(')
20694 /* It's a function-like macro. */
20695 char *name
= copy_string (body
, p
- body
);
20698 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
20702 p
= consume_improper_spaces (p
, body
);
20704 /* Parse the formal argument list. */
20705 while (*p
&& *p
!= ')')
20707 /* Find the extent of the current argument name. */
20708 const char *arg_start
= p
;
20710 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
20713 if (! *p
|| p
== arg_start
)
20714 dwarf2_macro_malformed_definition_complaint (body
);
20717 /* Make sure argv has room for the new argument. */
20718 if (argc
>= argv_size
)
20721 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
20724 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
20727 p
= consume_improper_spaces (p
, body
);
20729 /* Consume the comma, if present. */
20734 p
= consume_improper_spaces (p
, body
);
20743 /* Perfectly formed definition, no complaints. */
20744 macro_define_function (file
, line
, name
,
20745 argc
, (const char **) argv
,
20747 else if (*p
== '\0')
20749 /* Complain, but do define it. */
20750 dwarf2_macro_malformed_definition_complaint (body
);
20751 macro_define_function (file
, line
, name
,
20752 argc
, (const char **) argv
,
20756 /* Just complain. */
20757 dwarf2_macro_malformed_definition_complaint (body
);
20760 /* Just complain. */
20761 dwarf2_macro_malformed_definition_complaint (body
);
20767 for (i
= 0; i
< argc
; i
++)
20773 dwarf2_macro_malformed_definition_complaint (body
);
20776 /* Skip some bytes from BYTES according to the form given in FORM.
20777 Returns the new pointer. */
20779 static const gdb_byte
*
20780 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
20781 enum dwarf_form form
,
20782 unsigned int offset_size
,
20783 struct dwarf2_section_info
*section
)
20785 unsigned int bytes_read
;
20789 case DW_FORM_data1
:
20794 case DW_FORM_data2
:
20798 case DW_FORM_data4
:
20802 case DW_FORM_data8
:
20806 case DW_FORM_string
:
20807 read_direct_string (abfd
, bytes
, &bytes_read
);
20808 bytes
+= bytes_read
;
20811 case DW_FORM_sec_offset
:
20813 case DW_FORM_GNU_strp_alt
:
20814 bytes
+= offset_size
;
20817 case DW_FORM_block
:
20818 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
20819 bytes
+= bytes_read
;
20822 case DW_FORM_block1
:
20823 bytes
+= 1 + read_1_byte (abfd
, bytes
);
20825 case DW_FORM_block2
:
20826 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
20828 case DW_FORM_block4
:
20829 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
20832 case DW_FORM_sdata
:
20833 case DW_FORM_udata
:
20834 case DW_FORM_GNU_addr_index
:
20835 case DW_FORM_GNU_str_index
:
20836 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
20839 dwarf2_section_buffer_overflow_complaint (section
);
20847 complaint (&symfile_complaints
,
20848 _("invalid form 0x%x in `%s'"),
20849 form
, get_section_name (section
));
20857 /* A helper for dwarf_decode_macros that handles skipping an unknown
20858 opcode. Returns an updated pointer to the macro data buffer; or,
20859 on error, issues a complaint and returns NULL. */
20861 static const gdb_byte
*
20862 skip_unknown_opcode (unsigned int opcode
,
20863 const gdb_byte
**opcode_definitions
,
20864 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20866 unsigned int offset_size
,
20867 struct dwarf2_section_info
*section
)
20869 unsigned int bytes_read
, i
;
20871 const gdb_byte
*defn
;
20873 if (opcode_definitions
[opcode
] == NULL
)
20875 complaint (&symfile_complaints
,
20876 _("unrecognized DW_MACFINO opcode 0x%x"),
20881 defn
= opcode_definitions
[opcode
];
20882 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
20883 defn
+= bytes_read
;
20885 for (i
= 0; i
< arg
; ++i
)
20887 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
20889 if (mac_ptr
== NULL
)
20891 /* skip_form_bytes already issued the complaint. */
20899 /* A helper function which parses the header of a macro section.
20900 If the macro section is the extended (for now called "GNU") type,
20901 then this updates *OFFSET_SIZE. Returns a pointer to just after
20902 the header, or issues a complaint and returns NULL on error. */
20904 static const gdb_byte
*
20905 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
20907 const gdb_byte
*mac_ptr
,
20908 unsigned int *offset_size
,
20909 int section_is_gnu
)
20911 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
20913 if (section_is_gnu
)
20915 unsigned int version
, flags
;
20917 version
= read_2_bytes (abfd
, mac_ptr
);
20920 complaint (&symfile_complaints
,
20921 _("unrecognized version `%d' in .debug_macro section"),
20927 flags
= read_1_byte (abfd
, mac_ptr
);
20929 *offset_size
= (flags
& 1) ? 8 : 4;
20931 if ((flags
& 2) != 0)
20932 /* We don't need the line table offset. */
20933 mac_ptr
+= *offset_size
;
20935 /* Vendor opcode descriptions. */
20936 if ((flags
& 4) != 0)
20938 unsigned int i
, count
;
20940 count
= read_1_byte (abfd
, mac_ptr
);
20942 for (i
= 0; i
< count
; ++i
)
20944 unsigned int opcode
, bytes_read
;
20947 opcode
= read_1_byte (abfd
, mac_ptr
);
20949 opcode_definitions
[opcode
] = mac_ptr
;
20950 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
20951 mac_ptr
+= bytes_read
;
20960 /* A helper for dwarf_decode_macros that handles the GNU extensions,
20961 including DW_MACRO_GNU_transparent_include. */
20964 dwarf_decode_macro_bytes (bfd
*abfd
,
20965 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
20966 struct macro_source_file
*current_file
,
20967 struct line_header
*lh
,
20968 struct dwarf2_section_info
*section
,
20969 int section_is_gnu
, int section_is_dwz
,
20970 unsigned int offset_size
,
20971 htab_t include_hash
)
20973 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20974 enum dwarf_macro_record_type macinfo_type
;
20975 int at_commandline
;
20976 const gdb_byte
*opcode_definitions
[256];
20978 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
20979 &offset_size
, section_is_gnu
);
20980 if (mac_ptr
== NULL
)
20982 /* We already issued a complaint. */
20986 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
20987 GDB is still reading the definitions from command line. First
20988 DW_MACINFO_start_file will need to be ignored as it was already executed
20989 to create CURRENT_FILE for the main source holding also the command line
20990 definitions. On first met DW_MACINFO_start_file this flag is reset to
20991 normally execute all the remaining DW_MACINFO_start_file macinfos. */
20993 at_commandline
= 1;
20997 /* Do we at least have room for a macinfo type byte? */
20998 if (mac_ptr
>= mac_end
)
21000 dwarf2_section_buffer_overflow_complaint (section
);
21004 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21007 /* Note that we rely on the fact that the corresponding GNU and
21008 DWARF constants are the same. */
21009 switch (macinfo_type
)
21011 /* A zero macinfo type indicates the end of the macro
21016 case DW_MACRO_GNU_define
:
21017 case DW_MACRO_GNU_undef
:
21018 case DW_MACRO_GNU_define_indirect
:
21019 case DW_MACRO_GNU_undef_indirect
:
21020 case DW_MACRO_GNU_define_indirect_alt
:
21021 case DW_MACRO_GNU_undef_indirect_alt
:
21023 unsigned int bytes_read
;
21028 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21029 mac_ptr
+= bytes_read
;
21031 if (macinfo_type
== DW_MACRO_GNU_define
21032 || macinfo_type
== DW_MACRO_GNU_undef
)
21034 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21035 mac_ptr
+= bytes_read
;
21039 LONGEST str_offset
;
21041 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21042 mac_ptr
+= offset_size
;
21044 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
21045 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
21048 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21050 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
21053 body
= read_indirect_string_at_offset (abfd
, str_offset
);
21056 is_define
= (macinfo_type
== DW_MACRO_GNU_define
21057 || macinfo_type
== DW_MACRO_GNU_define_indirect
21058 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
21059 if (! current_file
)
21061 /* DWARF violation as no main source is present. */
21062 complaint (&symfile_complaints
,
21063 _("debug info with no main source gives macro %s "
21065 is_define
? _("definition") : _("undefinition"),
21069 if ((line
== 0 && !at_commandline
)
21070 || (line
!= 0 && at_commandline
))
21071 complaint (&symfile_complaints
,
21072 _("debug info gives %s macro %s with %s line %d: %s"),
21073 at_commandline
? _("command-line") : _("in-file"),
21074 is_define
? _("definition") : _("undefinition"),
21075 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
21078 parse_macro_definition (current_file
, line
, body
);
21081 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
21082 || macinfo_type
== DW_MACRO_GNU_undef_indirect
21083 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
21084 macro_undef (current_file
, line
, body
);
21089 case DW_MACRO_GNU_start_file
:
21091 unsigned int bytes_read
;
21094 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21095 mac_ptr
+= bytes_read
;
21096 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21097 mac_ptr
+= bytes_read
;
21099 if ((line
== 0 && !at_commandline
)
21100 || (line
!= 0 && at_commandline
))
21101 complaint (&symfile_complaints
,
21102 _("debug info gives source %d included "
21103 "from %s at %s line %d"),
21104 file
, at_commandline
? _("command-line") : _("file"),
21105 line
== 0 ? _("zero") : _("non-zero"), line
);
21107 if (at_commandline
)
21109 /* This DW_MACRO_GNU_start_file was executed in the
21111 at_commandline
= 0;
21114 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21118 case DW_MACRO_GNU_end_file
:
21119 if (! current_file
)
21120 complaint (&symfile_complaints
,
21121 _("macro debug info has an unmatched "
21122 "`close_file' directive"));
21125 current_file
= current_file
->included_by
;
21126 if (! current_file
)
21128 enum dwarf_macro_record_type next_type
;
21130 /* GCC circa March 2002 doesn't produce the zero
21131 type byte marking the end of the compilation
21132 unit. Complain if it's not there, but exit no
21135 /* Do we at least have room for a macinfo type byte? */
21136 if (mac_ptr
>= mac_end
)
21138 dwarf2_section_buffer_overflow_complaint (section
);
21142 /* We don't increment mac_ptr here, so this is just
21144 next_type
= read_1_byte (abfd
, mac_ptr
);
21145 if (next_type
!= 0)
21146 complaint (&symfile_complaints
,
21147 _("no terminating 0-type entry for "
21148 "macros in `.debug_macinfo' section"));
21155 case DW_MACRO_GNU_transparent_include
:
21156 case DW_MACRO_GNU_transparent_include_alt
:
21160 bfd
*include_bfd
= abfd
;
21161 struct dwarf2_section_info
*include_section
= section
;
21162 struct dwarf2_section_info alt_section
;
21163 const gdb_byte
*include_mac_end
= mac_end
;
21164 int is_dwz
= section_is_dwz
;
21165 const gdb_byte
*new_mac_ptr
;
21167 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
21168 mac_ptr
+= offset_size
;
21170 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
21172 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
21174 dwarf2_read_section (objfile
, &dwz
->macro
);
21176 include_section
= &dwz
->macro
;
21177 include_bfd
= get_section_bfd_owner (include_section
);
21178 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
21182 new_mac_ptr
= include_section
->buffer
+ offset
;
21183 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
21187 /* This has actually happened; see
21188 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
21189 complaint (&symfile_complaints
,
21190 _("recursive DW_MACRO_GNU_transparent_include in "
21191 ".debug_macro section"));
21195 *slot
= (void *) new_mac_ptr
;
21197 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
21198 include_mac_end
, current_file
, lh
,
21199 section
, section_is_gnu
, is_dwz
,
21200 offset_size
, include_hash
);
21202 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
21207 case DW_MACINFO_vendor_ext
:
21208 if (!section_is_gnu
)
21210 unsigned int bytes_read
;
21213 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21214 mac_ptr
+= bytes_read
;
21215 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21216 mac_ptr
+= bytes_read
;
21218 /* We don't recognize any vendor extensions. */
21224 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21225 mac_ptr
, mac_end
, abfd
, offset_size
,
21227 if (mac_ptr
== NULL
)
21231 } while (macinfo_type
!= 0);
21235 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
21236 int section_is_gnu
)
21238 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21239 struct line_header
*lh
= cu
->line_header
;
21241 const gdb_byte
*mac_ptr
, *mac_end
;
21242 struct macro_source_file
*current_file
= 0;
21243 enum dwarf_macro_record_type macinfo_type
;
21244 unsigned int offset_size
= cu
->header
.offset_size
;
21245 const gdb_byte
*opcode_definitions
[256];
21246 struct cleanup
*cleanup
;
21247 htab_t include_hash
;
21249 struct dwarf2_section_info
*section
;
21250 const char *section_name
;
21252 if (cu
->dwo_unit
!= NULL
)
21254 if (section_is_gnu
)
21256 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
21257 section_name
= ".debug_macro.dwo";
21261 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
21262 section_name
= ".debug_macinfo.dwo";
21267 if (section_is_gnu
)
21269 section
= &dwarf2_per_objfile
->macro
;
21270 section_name
= ".debug_macro";
21274 section
= &dwarf2_per_objfile
->macinfo
;
21275 section_name
= ".debug_macinfo";
21279 dwarf2_read_section (objfile
, section
);
21280 if (section
->buffer
== NULL
)
21282 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
21285 abfd
= get_section_bfd_owner (section
);
21287 /* First pass: Find the name of the base filename.
21288 This filename is needed in order to process all macros whose definition
21289 (or undefinition) comes from the command line. These macros are defined
21290 before the first DW_MACINFO_start_file entry, and yet still need to be
21291 associated to the base file.
21293 To determine the base file name, we scan the macro definitions until we
21294 reach the first DW_MACINFO_start_file entry. We then initialize
21295 CURRENT_FILE accordingly so that any macro definition found before the
21296 first DW_MACINFO_start_file can still be associated to the base file. */
21298 mac_ptr
= section
->buffer
+ offset
;
21299 mac_end
= section
->buffer
+ section
->size
;
21301 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
21302 &offset_size
, section_is_gnu
);
21303 if (mac_ptr
== NULL
)
21305 /* We already issued a complaint. */
21311 /* Do we at least have room for a macinfo type byte? */
21312 if (mac_ptr
>= mac_end
)
21314 /* Complaint is printed during the second pass as GDB will probably
21315 stop the first pass earlier upon finding
21316 DW_MACINFO_start_file. */
21320 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
21323 /* Note that we rely on the fact that the corresponding GNU and
21324 DWARF constants are the same. */
21325 switch (macinfo_type
)
21327 /* A zero macinfo type indicates the end of the macro
21332 case DW_MACRO_GNU_define
:
21333 case DW_MACRO_GNU_undef
:
21334 /* Only skip the data by MAC_PTR. */
21336 unsigned int bytes_read
;
21338 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21339 mac_ptr
+= bytes_read
;
21340 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21341 mac_ptr
+= bytes_read
;
21345 case DW_MACRO_GNU_start_file
:
21347 unsigned int bytes_read
;
21350 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21351 mac_ptr
+= bytes_read
;
21352 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21353 mac_ptr
+= bytes_read
;
21355 current_file
= macro_start_file (file
, line
, current_file
, lh
);
21359 case DW_MACRO_GNU_end_file
:
21360 /* No data to skip by MAC_PTR. */
21363 case DW_MACRO_GNU_define_indirect
:
21364 case DW_MACRO_GNU_undef_indirect
:
21365 case DW_MACRO_GNU_define_indirect_alt
:
21366 case DW_MACRO_GNU_undef_indirect_alt
:
21368 unsigned int bytes_read
;
21370 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21371 mac_ptr
+= bytes_read
;
21372 mac_ptr
+= offset_size
;
21376 case DW_MACRO_GNU_transparent_include
:
21377 case DW_MACRO_GNU_transparent_include_alt
:
21378 /* Note that, according to the spec, a transparent include
21379 chain cannot call DW_MACRO_GNU_start_file. So, we can just
21380 skip this opcode. */
21381 mac_ptr
+= offset_size
;
21384 case DW_MACINFO_vendor_ext
:
21385 /* Only skip the data by MAC_PTR. */
21386 if (!section_is_gnu
)
21388 unsigned int bytes_read
;
21390 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
21391 mac_ptr
+= bytes_read
;
21392 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
21393 mac_ptr
+= bytes_read
;
21398 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
21399 mac_ptr
, mac_end
, abfd
, offset_size
,
21401 if (mac_ptr
== NULL
)
21405 } while (macinfo_type
!= 0 && current_file
== NULL
);
21407 /* Second pass: Process all entries.
21409 Use the AT_COMMAND_LINE flag to determine whether we are still processing
21410 command-line macro definitions/undefinitions. This flag is unset when we
21411 reach the first DW_MACINFO_start_file entry. */
21413 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
21414 NULL
, xcalloc
, xfree
);
21415 cleanup
= make_cleanup_htab_delete (include_hash
);
21416 mac_ptr
= section
->buffer
+ offset
;
21417 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
21418 *slot
= (void *) mac_ptr
;
21419 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
21420 current_file
, lh
, section
,
21421 section_is_gnu
, 0, offset_size
, include_hash
);
21422 do_cleanups (cleanup
);
21425 /* Check if the attribute's form is a DW_FORM_block*
21426 if so return true else false. */
21429 attr_form_is_block (const struct attribute
*attr
)
21431 return (attr
== NULL
? 0 :
21432 attr
->form
== DW_FORM_block1
21433 || attr
->form
== DW_FORM_block2
21434 || attr
->form
== DW_FORM_block4
21435 || attr
->form
== DW_FORM_block
21436 || attr
->form
== DW_FORM_exprloc
);
21439 /* Return non-zero if ATTR's value is a section offset --- classes
21440 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
21441 You may use DW_UNSND (attr) to retrieve such offsets.
21443 Section 7.5.4, "Attribute Encodings", explains that no attribute
21444 may have a value that belongs to more than one of these classes; it
21445 would be ambiguous if we did, because we use the same forms for all
21449 attr_form_is_section_offset (const struct attribute
*attr
)
21451 return (attr
->form
== DW_FORM_data4
21452 || attr
->form
== DW_FORM_data8
21453 || attr
->form
== DW_FORM_sec_offset
);
21456 /* Return non-zero if ATTR's value falls in the 'constant' class, or
21457 zero otherwise. When this function returns true, you can apply
21458 dwarf2_get_attr_constant_value to it.
21460 However, note that for some attributes you must check
21461 attr_form_is_section_offset before using this test. DW_FORM_data4
21462 and DW_FORM_data8 are members of both the constant class, and of
21463 the classes that contain offsets into other debug sections
21464 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
21465 that, if an attribute's can be either a constant or one of the
21466 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
21467 taken as section offsets, not constants. */
21470 attr_form_is_constant (const struct attribute
*attr
)
21472 switch (attr
->form
)
21474 case DW_FORM_sdata
:
21475 case DW_FORM_udata
:
21476 case DW_FORM_data1
:
21477 case DW_FORM_data2
:
21478 case DW_FORM_data4
:
21479 case DW_FORM_data8
:
21487 /* DW_ADDR is always stored already as sect_offset; despite for the forms
21488 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
21491 attr_form_is_ref (const struct attribute
*attr
)
21493 switch (attr
->form
)
21495 case DW_FORM_ref_addr
:
21500 case DW_FORM_ref_udata
:
21501 case DW_FORM_GNU_ref_alt
:
21508 /* Return the .debug_loc section to use for CU.
21509 For DWO files use .debug_loc.dwo. */
21511 static struct dwarf2_section_info
*
21512 cu_debug_loc_section (struct dwarf2_cu
*cu
)
21515 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
21516 return &dwarf2_per_objfile
->loc
;
21519 /* A helper function that fills in a dwarf2_loclist_baton. */
21522 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
21523 struct dwarf2_loclist_baton
*baton
,
21524 const struct attribute
*attr
)
21526 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21528 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
21530 baton
->per_cu
= cu
->per_cu
;
21531 gdb_assert (baton
->per_cu
);
21532 /* We don't know how long the location list is, but make sure we
21533 don't run off the edge of the section. */
21534 baton
->size
= section
->size
- DW_UNSND (attr
);
21535 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
21536 baton
->base_address
= cu
->base_address
;
21537 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
21541 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
21542 struct dwarf2_cu
*cu
, int is_block
)
21544 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21545 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
21547 if (attr_form_is_section_offset (attr
)
21548 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
21549 the section. If so, fall through to the complaint in the
21551 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
21553 struct dwarf2_loclist_baton
*baton
;
21555 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21556 sizeof (struct dwarf2_loclist_baton
));
21558 fill_in_loclist_baton (cu
, baton
, attr
);
21560 if (cu
->base_known
== 0)
21561 complaint (&symfile_complaints
,
21562 _("Location list used without "
21563 "specifying the CU base address."));
21565 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21566 ? dwarf2_loclist_block_index
21567 : dwarf2_loclist_index
);
21568 SYMBOL_LOCATION_BATON (sym
) = baton
;
21572 struct dwarf2_locexpr_baton
*baton
;
21574 baton
= obstack_alloc (&objfile
->objfile_obstack
,
21575 sizeof (struct dwarf2_locexpr_baton
));
21576 baton
->per_cu
= cu
->per_cu
;
21577 gdb_assert (baton
->per_cu
);
21579 if (attr_form_is_block (attr
))
21581 /* Note that we're just copying the block's data pointer
21582 here, not the actual data. We're still pointing into the
21583 info_buffer for SYM's objfile; right now we never release
21584 that buffer, but when we do clean up properly this may
21586 baton
->size
= DW_BLOCK (attr
)->size
;
21587 baton
->data
= DW_BLOCK (attr
)->data
;
21591 dwarf2_invalid_attrib_class_complaint ("location description",
21592 SYMBOL_NATURAL_NAME (sym
));
21596 SYMBOL_ACLASS_INDEX (sym
) = (is_block
21597 ? dwarf2_locexpr_block_index
21598 : dwarf2_locexpr_index
);
21599 SYMBOL_LOCATION_BATON (sym
) = baton
;
21603 /* Return the OBJFILE associated with the compilation unit CU. If CU
21604 came from a separate debuginfo file, then the master objfile is
21608 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
21610 struct objfile
*objfile
= per_cu
->objfile
;
21612 /* Return the master objfile, so that we can report and look up the
21613 correct file containing this variable. */
21614 if (objfile
->separate_debug_objfile_backlink
)
21615 objfile
= objfile
->separate_debug_objfile_backlink
;
21620 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
21621 (CU_HEADERP is unused in such case) or prepare a temporary copy at
21622 CU_HEADERP first. */
21624 static const struct comp_unit_head
*
21625 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
21626 struct dwarf2_per_cu_data
*per_cu
)
21628 const gdb_byte
*info_ptr
;
21631 return &per_cu
->cu
->header
;
21633 info_ptr
= per_cu
->section
->buffer
+ per_cu
->offset
.sect_off
;
21635 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
21636 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
21641 /* Return the address size given in the compilation unit header for CU. */
21644 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21646 struct comp_unit_head cu_header_local
;
21647 const struct comp_unit_head
*cu_headerp
;
21649 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21651 return cu_headerp
->addr_size
;
21654 /* Return the offset size given in the compilation unit header for CU. */
21657 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
21659 struct comp_unit_head cu_header_local
;
21660 const struct comp_unit_head
*cu_headerp
;
21662 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21664 return cu_headerp
->offset_size
;
21667 /* See its dwarf2loc.h declaration. */
21670 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
21672 struct comp_unit_head cu_header_local
;
21673 const struct comp_unit_head
*cu_headerp
;
21675 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
21677 if (cu_headerp
->version
== 2)
21678 return cu_headerp
->addr_size
;
21680 return cu_headerp
->offset_size
;
21683 /* Return the text offset of the CU. The returned offset comes from
21684 this CU's objfile. If this objfile came from a separate debuginfo
21685 file, then the offset may be different from the corresponding
21686 offset in the parent objfile. */
21689 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
21691 struct objfile
*objfile
= per_cu
->objfile
;
21693 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21696 /* Locate the .debug_info compilation unit from CU's objfile which contains
21697 the DIE at OFFSET. Raises an error on failure. */
21699 static struct dwarf2_per_cu_data
*
21700 dwarf2_find_containing_comp_unit (sect_offset offset
,
21701 unsigned int offset_in_dwz
,
21702 struct objfile
*objfile
)
21704 struct dwarf2_per_cu_data
*this_cu
;
21706 const sect_offset
*cu_off
;
21709 high
= dwarf2_per_objfile
->n_comp_units
- 1;
21712 struct dwarf2_per_cu_data
*mid_cu
;
21713 int mid
= low
+ (high
- low
) / 2;
21715 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
21716 cu_off
= &mid_cu
->offset
;
21717 if (mid_cu
->is_dwz
> offset_in_dwz
21718 || (mid_cu
->is_dwz
== offset_in_dwz
21719 && cu_off
->sect_off
>= offset
.sect_off
))
21724 gdb_assert (low
== high
);
21725 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21726 cu_off
= &this_cu
->offset
;
21727 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
21729 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
21730 error (_("Dwarf Error: could not find partial DIE containing "
21731 "offset 0x%lx [in module %s]"),
21732 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
21734 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
21735 <= offset
.sect_off
);
21736 return dwarf2_per_objfile
->all_comp_units
[low
-1];
21740 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
21741 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
21742 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
21743 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
21744 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
21749 /* Initialize dwarf2_cu CU, owned by PER_CU. */
21752 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
21754 memset (cu
, 0, sizeof (*cu
));
21756 cu
->per_cu
= per_cu
;
21757 cu
->objfile
= per_cu
->objfile
;
21758 obstack_init (&cu
->comp_unit_obstack
);
21761 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
21764 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
21765 enum language pretend_language
)
21767 struct attribute
*attr
;
21769 /* Set the language we're debugging. */
21770 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
21772 set_cu_language (DW_UNSND (attr
), cu
);
21775 cu
->language
= pretend_language
;
21776 cu
->language_defn
= language_def (cu
->language
);
21779 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
21781 cu
->producer
= DW_STRING (attr
);
21784 /* Release one cached compilation unit, CU. We unlink it from the tree
21785 of compilation units, but we don't remove it from the read_in_chain;
21786 the caller is responsible for that.
21787 NOTE: DATA is a void * because this function is also used as a
21788 cleanup routine. */
21791 free_heap_comp_unit (void *data
)
21793 struct dwarf2_cu
*cu
= data
;
21795 gdb_assert (cu
->per_cu
!= NULL
);
21796 cu
->per_cu
->cu
= NULL
;
21799 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21804 /* This cleanup function is passed the address of a dwarf2_cu on the stack
21805 when we're finished with it. We can't free the pointer itself, but be
21806 sure to unlink it from the cache. Also release any associated storage. */
21809 free_stack_comp_unit (void *data
)
21811 struct dwarf2_cu
*cu
= data
;
21813 gdb_assert (cu
->per_cu
!= NULL
);
21814 cu
->per_cu
->cu
= NULL
;
21817 obstack_free (&cu
->comp_unit_obstack
, NULL
);
21818 cu
->partial_dies
= NULL
;
21821 /* Free all cached compilation units. */
21824 free_cached_comp_units (void *data
)
21826 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21828 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21829 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21830 while (per_cu
!= NULL
)
21832 struct dwarf2_per_cu_data
*next_cu
;
21834 next_cu
= per_cu
->cu
->read_in_chain
;
21836 free_heap_comp_unit (per_cu
->cu
);
21837 *last_chain
= next_cu
;
21843 /* Increase the age counter on each cached compilation unit, and free
21844 any that are too old. */
21847 age_cached_comp_units (void)
21849 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21851 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
21852 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21853 while (per_cu
!= NULL
)
21855 per_cu
->cu
->last_used
++;
21856 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
21857 dwarf2_mark (per_cu
->cu
);
21858 per_cu
= per_cu
->cu
->read_in_chain
;
21861 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21862 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21863 while (per_cu
!= NULL
)
21865 struct dwarf2_per_cu_data
*next_cu
;
21867 next_cu
= per_cu
->cu
->read_in_chain
;
21869 if (!per_cu
->cu
->mark
)
21871 free_heap_comp_unit (per_cu
->cu
);
21872 *last_chain
= next_cu
;
21875 last_chain
= &per_cu
->cu
->read_in_chain
;
21881 /* Remove a single compilation unit from the cache. */
21884 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
21886 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
21888 per_cu
= dwarf2_per_objfile
->read_in_chain
;
21889 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
21890 while (per_cu
!= NULL
)
21892 struct dwarf2_per_cu_data
*next_cu
;
21894 next_cu
= per_cu
->cu
->read_in_chain
;
21896 if (per_cu
== target_per_cu
)
21898 free_heap_comp_unit (per_cu
->cu
);
21900 *last_chain
= next_cu
;
21904 last_chain
= &per_cu
->cu
->read_in_chain
;
21910 /* Release all extra memory associated with OBJFILE. */
21913 dwarf2_free_objfile (struct objfile
*objfile
)
21915 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
21917 if (dwarf2_per_objfile
== NULL
)
21920 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
21921 free_cached_comp_units (NULL
);
21923 if (dwarf2_per_objfile
->quick_file_names_table
)
21924 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
21926 if (dwarf2_per_objfile
->line_header_hash
)
21927 htab_delete (dwarf2_per_objfile
->line_header_hash
);
21929 /* Everything else should be on the objfile obstack. */
21932 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
21933 We store these in a hash table separate from the DIEs, and preserve them
21934 when the DIEs are flushed out of cache.
21936 The CU "per_cu" pointer is needed because offset alone is not enough to
21937 uniquely identify the type. A file may have multiple .debug_types sections,
21938 or the type may come from a DWO file. Furthermore, while it's more logical
21939 to use per_cu->section+offset, with Fission the section with the data is in
21940 the DWO file but we don't know that section at the point we need it.
21941 We have to use something in dwarf2_per_cu_data (or the pointer to it)
21942 because we can enter the lookup routine, get_die_type_at_offset, from
21943 outside this file, and thus won't necessarily have PER_CU->cu.
21944 Fortunately, PER_CU is stable for the life of the objfile. */
21946 struct dwarf2_per_cu_offset_and_type
21948 const struct dwarf2_per_cu_data
*per_cu
;
21949 sect_offset offset
;
21953 /* Hash function for a dwarf2_per_cu_offset_and_type. */
21956 per_cu_offset_and_type_hash (const void *item
)
21958 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
21960 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
21963 /* Equality function for a dwarf2_per_cu_offset_and_type. */
21966 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
21968 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
21969 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
21971 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
21972 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
21975 /* Set the type associated with DIE to TYPE. Save it in CU's hash
21976 table if necessary. For convenience, return TYPE.
21978 The DIEs reading must have careful ordering to:
21979 * Not cause infite loops trying to read in DIEs as a prerequisite for
21980 reading current DIE.
21981 * Not trying to dereference contents of still incompletely read in types
21982 while reading in other DIEs.
21983 * Enable referencing still incompletely read in types just by a pointer to
21984 the type without accessing its fields.
21986 Therefore caller should follow these rules:
21987 * Try to fetch any prerequisite types we may need to build this DIE type
21988 before building the type and calling set_die_type.
21989 * After building type call set_die_type for current DIE as soon as
21990 possible before fetching more types to complete the current type.
21991 * Make the type as complete as possible before fetching more types. */
21993 static struct type
*
21994 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
21996 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
21997 struct objfile
*objfile
= cu
->objfile
;
21998 struct attribute
*attr
;
21999 struct dynamic_prop prop
;
22001 /* For Ada types, make sure that the gnat-specific data is always
22002 initialized (if not already set). There are a few types where
22003 we should not be doing so, because the type-specific area is
22004 already used to hold some other piece of info (eg: TYPE_CODE_FLT
22005 where the type-specific area is used to store the floatformat).
22006 But this is not a problem, because the gnat-specific information
22007 is actually not needed for these types. */
22008 if (need_gnat_info (cu
)
22009 && TYPE_CODE (type
) != TYPE_CODE_FUNC
22010 && TYPE_CODE (type
) != TYPE_CODE_FLT
22011 && !HAVE_GNAT_AUX_INFO (type
))
22012 INIT_GNAT_SPECIFIC (type
);
22014 /* Read DW_AT_data_location and set in type. */
22015 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
22016 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
22018 TYPE_DATA_LOCATION (type
)
22019 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (prop
));
22020 *TYPE_DATA_LOCATION (type
) = prop
;
22023 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22025 dwarf2_per_objfile
->die_type_hash
=
22026 htab_create_alloc_ex (127,
22027 per_cu_offset_and_type_hash
,
22028 per_cu_offset_and_type_eq
,
22030 &objfile
->objfile_obstack
,
22031 hashtab_obstack_allocate
,
22032 dummy_obstack_deallocate
);
22035 ofs
.per_cu
= cu
->per_cu
;
22036 ofs
.offset
= die
->offset
;
22038 slot
= (struct dwarf2_per_cu_offset_and_type
**)
22039 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
22041 complaint (&symfile_complaints
,
22042 _("A problem internal to GDB: DIE 0x%x has type already set"),
22043 die
->offset
.sect_off
);
22044 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
22049 /* Look up the type for the die at OFFSET in PER_CU in die_type_hash,
22050 or return NULL if the die does not have a saved type. */
22052 static struct type
*
22053 get_die_type_at_offset (sect_offset offset
,
22054 struct dwarf2_per_cu_data
*per_cu
)
22056 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
22058 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
22061 ofs
.per_cu
= per_cu
;
22062 ofs
.offset
= offset
;
22063 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
22070 /* Look up the type for DIE in CU in die_type_hash,
22071 or return NULL if DIE does not have a saved type. */
22073 static struct type
*
22074 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22076 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
22079 /* Add a dependence relationship from CU to REF_PER_CU. */
22082 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
22083 struct dwarf2_per_cu_data
*ref_per_cu
)
22087 if (cu
->dependencies
== NULL
)
22089 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
22090 NULL
, &cu
->comp_unit_obstack
,
22091 hashtab_obstack_allocate
,
22092 dummy_obstack_deallocate
);
22094 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
22096 *slot
= ref_per_cu
;
22099 /* Subroutine of dwarf2_mark to pass to htab_traverse.
22100 Set the mark field in every compilation unit in the
22101 cache that we must keep because we are keeping CU. */
22104 dwarf2_mark_helper (void **slot
, void *data
)
22106 struct dwarf2_per_cu_data
*per_cu
;
22108 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
22110 /* cu->dependencies references may not yet have been ever read if QUIT aborts
22111 reading of the chain. As such dependencies remain valid it is not much
22112 useful to track and undo them during QUIT cleanups. */
22113 if (per_cu
->cu
== NULL
)
22116 if (per_cu
->cu
->mark
)
22118 per_cu
->cu
->mark
= 1;
22120 if (per_cu
->cu
->dependencies
!= NULL
)
22121 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22126 /* Set the mark field in CU and in every other compilation unit in the
22127 cache that we must keep because we are keeping CU. */
22130 dwarf2_mark (struct dwarf2_cu
*cu
)
22135 if (cu
->dependencies
!= NULL
)
22136 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
22140 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
22144 per_cu
->cu
->mark
= 0;
22145 per_cu
= per_cu
->cu
->read_in_chain
;
22149 /* Trivial hash function for partial_die_info: the hash value of a DIE
22150 is its offset in .debug_info for this objfile. */
22153 partial_die_hash (const void *item
)
22155 const struct partial_die_info
*part_die
= item
;
22157 return part_die
->offset
.sect_off
;
22160 /* Trivial comparison function for partial_die_info structures: two DIEs
22161 are equal if they have the same offset. */
22164 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
22166 const struct partial_die_info
*part_die_lhs
= item_lhs
;
22167 const struct partial_die_info
*part_die_rhs
= item_rhs
;
22169 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
22172 static struct cmd_list_element
*set_dwarf2_cmdlist
;
22173 static struct cmd_list_element
*show_dwarf2_cmdlist
;
22176 set_dwarf2_cmd (char *args
, int from_tty
)
22178 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", all_commands
,
22183 show_dwarf2_cmd (char *args
, int from_tty
)
22185 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
22188 /* Free data associated with OBJFILE, if necessary. */
22191 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
22193 struct dwarf2_per_objfile
*data
= d
;
22196 /* Make sure we don't accidentally use dwarf2_per_objfile while
22198 dwarf2_per_objfile
= NULL
;
22200 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
22201 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
22203 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
22204 VEC_free (dwarf2_per_cu_ptr
,
22205 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
22206 xfree (data
->all_type_units
);
22208 VEC_free (dwarf2_section_info_def
, data
->types
);
22210 if (data
->dwo_files
)
22211 free_dwo_files (data
->dwo_files
, objfile
);
22212 if (data
->dwp_file
)
22213 gdb_bfd_unref (data
->dwp_file
->dbfd
);
22215 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
22216 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
22220 /* The "save gdb-index" command. */
22222 /* The contents of the hash table we create when building the string
22224 struct strtab_entry
22226 offset_type offset
;
22230 /* Hash function for a strtab_entry.
22232 Function is used only during write_hash_table so no index format backward
22233 compatibility is needed. */
22236 hash_strtab_entry (const void *e
)
22238 const struct strtab_entry
*entry
= e
;
22239 return mapped_index_string_hash (INT_MAX
, entry
->str
);
22242 /* Equality function for a strtab_entry. */
22245 eq_strtab_entry (const void *a
, const void *b
)
22247 const struct strtab_entry
*ea
= a
;
22248 const struct strtab_entry
*eb
= b
;
22249 return !strcmp (ea
->str
, eb
->str
);
22252 /* Create a strtab_entry hash table. */
22255 create_strtab (void)
22257 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
22258 xfree
, xcalloc
, xfree
);
22261 /* Add a string to the constant pool. Return the string's offset in
22265 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
22268 struct strtab_entry entry
;
22269 struct strtab_entry
*result
;
22272 slot
= htab_find_slot (table
, &entry
, INSERT
);
22277 result
= XNEW (struct strtab_entry
);
22278 result
->offset
= obstack_object_size (cpool
);
22280 obstack_grow_str0 (cpool
, str
);
22283 return result
->offset
;
22286 /* An entry in the symbol table. */
22287 struct symtab_index_entry
22289 /* The name of the symbol. */
22291 /* The offset of the name in the constant pool. */
22292 offset_type index_offset
;
22293 /* A sorted vector of the indices of all the CUs that hold an object
22295 VEC (offset_type
) *cu_indices
;
22298 /* The symbol table. This is a power-of-2-sized hash table. */
22299 struct mapped_symtab
22301 offset_type n_elements
;
22303 struct symtab_index_entry
**data
;
22306 /* Hash function for a symtab_index_entry. */
22309 hash_symtab_entry (const void *e
)
22311 const struct symtab_index_entry
*entry
= e
;
22312 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
22313 sizeof (offset_type
) * VEC_length (offset_type
,
22314 entry
->cu_indices
),
22318 /* Equality function for a symtab_index_entry. */
22321 eq_symtab_entry (const void *a
, const void *b
)
22323 const struct symtab_index_entry
*ea
= a
;
22324 const struct symtab_index_entry
*eb
= b
;
22325 int len
= VEC_length (offset_type
, ea
->cu_indices
);
22326 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
22328 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
22329 VEC_address (offset_type
, eb
->cu_indices
),
22330 sizeof (offset_type
) * len
);
22333 /* Destroy a symtab_index_entry. */
22336 delete_symtab_entry (void *p
)
22338 struct symtab_index_entry
*entry
= p
;
22339 VEC_free (offset_type
, entry
->cu_indices
);
22343 /* Create a hash table holding symtab_index_entry objects. */
22346 create_symbol_hash_table (void)
22348 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
22349 delete_symtab_entry
, xcalloc
, xfree
);
22352 /* Create a new mapped symtab object. */
22354 static struct mapped_symtab
*
22355 create_mapped_symtab (void)
22357 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
22358 symtab
->n_elements
= 0;
22359 symtab
->size
= 1024;
22360 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22364 /* Destroy a mapped_symtab. */
22367 cleanup_mapped_symtab (void *p
)
22369 struct mapped_symtab
*symtab
= p
;
22370 /* The contents of the array are freed when the other hash table is
22372 xfree (symtab
->data
);
22376 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
22379 Function is used only during write_hash_table so no index format backward
22380 compatibility is needed. */
22382 static struct symtab_index_entry
**
22383 find_slot (struct mapped_symtab
*symtab
, const char *name
)
22385 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
22387 index
= hash
& (symtab
->size
- 1);
22388 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
22392 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
22393 return &symtab
->data
[index
];
22394 index
= (index
+ step
) & (symtab
->size
- 1);
22398 /* Expand SYMTAB's hash table. */
22401 hash_expand (struct mapped_symtab
*symtab
)
22403 offset_type old_size
= symtab
->size
;
22405 struct symtab_index_entry
**old_entries
= symtab
->data
;
22408 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
22410 for (i
= 0; i
< old_size
; ++i
)
22412 if (old_entries
[i
])
22414 struct symtab_index_entry
**slot
= find_slot (symtab
,
22415 old_entries
[i
]->name
);
22416 *slot
= old_entries
[i
];
22420 xfree (old_entries
);
22423 /* Add an entry to SYMTAB. NAME is the name of the symbol.
22424 CU_INDEX is the index of the CU in which the symbol appears.
22425 IS_STATIC is one if the symbol is static, otherwise zero (global). */
22428 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
22429 int is_static
, gdb_index_symbol_kind kind
,
22430 offset_type cu_index
)
22432 struct symtab_index_entry
**slot
;
22433 offset_type cu_index_and_attrs
;
22435 ++symtab
->n_elements
;
22436 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
22437 hash_expand (symtab
);
22439 slot
= find_slot (symtab
, name
);
22442 *slot
= XNEW (struct symtab_index_entry
);
22443 (*slot
)->name
= name
;
22444 /* index_offset is set later. */
22445 (*slot
)->cu_indices
= NULL
;
22448 cu_index_and_attrs
= 0;
22449 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
22450 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
22451 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
22453 /* We don't want to record an index value twice as we want to avoid the
22455 We process all global symbols and then all static symbols
22456 (which would allow us to avoid the duplication by only having to check
22457 the last entry pushed), but a symbol could have multiple kinds in one CU.
22458 To keep things simple we don't worry about the duplication here and
22459 sort and uniqufy the list after we've processed all symbols. */
22460 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
22463 /* qsort helper routine for uniquify_cu_indices. */
22466 offset_type_compare (const void *ap
, const void *bp
)
22468 offset_type a
= *(offset_type
*) ap
;
22469 offset_type b
= *(offset_type
*) bp
;
22471 return (a
> b
) - (b
> a
);
22474 /* Sort and remove duplicates of all symbols' cu_indices lists. */
22477 uniquify_cu_indices (struct mapped_symtab
*symtab
)
22481 for (i
= 0; i
< symtab
->size
; ++i
)
22483 struct symtab_index_entry
*entry
= symtab
->data
[i
];
22486 && entry
->cu_indices
!= NULL
)
22488 unsigned int next_to_insert
, next_to_check
;
22489 offset_type last_value
;
22491 qsort (VEC_address (offset_type
, entry
->cu_indices
),
22492 VEC_length (offset_type
, entry
->cu_indices
),
22493 sizeof (offset_type
), offset_type_compare
);
22495 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
22496 next_to_insert
= 1;
22497 for (next_to_check
= 1;
22498 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
22501 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
22504 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
22506 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
22511 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
22516 /* Add a vector of indices to the constant pool. */
22519 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
22520 struct symtab_index_entry
*entry
)
22524 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
22527 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
22528 offset_type val
= MAYBE_SWAP (len
);
22533 entry
->index_offset
= obstack_object_size (cpool
);
22535 obstack_grow (cpool
, &val
, sizeof (val
));
22537 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
22540 val
= MAYBE_SWAP (iter
);
22541 obstack_grow (cpool
, &val
, sizeof (val
));
22546 struct symtab_index_entry
*old_entry
= *slot
;
22547 entry
->index_offset
= old_entry
->index_offset
;
22550 return entry
->index_offset
;
22553 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
22554 constant pool entries going into the obstack CPOOL. */
22557 write_hash_table (struct mapped_symtab
*symtab
,
22558 struct obstack
*output
, struct obstack
*cpool
)
22561 htab_t symbol_hash_table
;
22564 symbol_hash_table
= create_symbol_hash_table ();
22565 str_table
= create_strtab ();
22567 /* We add all the index vectors to the constant pool first, to
22568 ensure alignment is ok. */
22569 for (i
= 0; i
< symtab
->size
; ++i
)
22571 if (symtab
->data
[i
])
22572 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
22575 /* Now write out the hash table. */
22576 for (i
= 0; i
< symtab
->size
; ++i
)
22578 offset_type str_off
, vec_off
;
22580 if (symtab
->data
[i
])
22582 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
22583 vec_off
= symtab
->data
[i
]->index_offset
;
22587 /* While 0 is a valid constant pool index, it is not valid
22588 to have 0 for both offsets. */
22593 str_off
= MAYBE_SWAP (str_off
);
22594 vec_off
= MAYBE_SWAP (vec_off
);
22596 obstack_grow (output
, &str_off
, sizeof (str_off
));
22597 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
22600 htab_delete (str_table
);
22601 htab_delete (symbol_hash_table
);
22604 /* Struct to map psymtab to CU index in the index file. */
22605 struct psymtab_cu_index_map
22607 struct partial_symtab
*psymtab
;
22608 unsigned int cu_index
;
22612 hash_psymtab_cu_index (const void *item
)
22614 const struct psymtab_cu_index_map
*map
= item
;
22616 return htab_hash_pointer (map
->psymtab
);
22620 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
22622 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
22623 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
22625 return lhs
->psymtab
== rhs
->psymtab
;
22628 /* Helper struct for building the address table. */
22629 struct addrmap_index_data
22631 struct objfile
*objfile
;
22632 struct obstack
*addr_obstack
;
22633 htab_t cu_index_htab
;
22635 /* Non-zero if the previous_* fields are valid.
22636 We can't write an entry until we see the next entry (since it is only then
22637 that we know the end of the entry). */
22638 int previous_valid
;
22639 /* Index of the CU in the table of all CUs in the index file. */
22640 unsigned int previous_cu_index
;
22641 /* Start address of the CU. */
22642 CORE_ADDR previous_cu_start
;
22645 /* Write an address entry to OBSTACK. */
22648 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
22649 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
22651 offset_type cu_index_to_write
;
22653 CORE_ADDR baseaddr
;
22655 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22657 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
22658 obstack_grow (obstack
, addr
, 8);
22659 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
22660 obstack_grow (obstack
, addr
, 8);
22661 cu_index_to_write
= MAYBE_SWAP (cu_index
);
22662 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
22665 /* Worker function for traversing an addrmap to build the address table. */
22668 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
22670 struct addrmap_index_data
*data
= datap
;
22671 struct partial_symtab
*pst
= obj
;
22673 if (data
->previous_valid
)
22674 add_address_entry (data
->objfile
, data
->addr_obstack
,
22675 data
->previous_cu_start
, start_addr
,
22676 data
->previous_cu_index
);
22678 data
->previous_cu_start
= start_addr
;
22681 struct psymtab_cu_index_map find_map
, *map
;
22682 find_map
.psymtab
= pst
;
22683 map
= htab_find (data
->cu_index_htab
, &find_map
);
22684 gdb_assert (map
!= NULL
);
22685 data
->previous_cu_index
= map
->cu_index
;
22686 data
->previous_valid
= 1;
22689 data
->previous_valid
= 0;
22694 /* Write OBJFILE's address map to OBSTACK.
22695 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
22696 in the index file. */
22699 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
22700 htab_t cu_index_htab
)
22702 struct addrmap_index_data addrmap_index_data
;
22704 /* When writing the address table, we have to cope with the fact that
22705 the addrmap iterator only provides the start of a region; we have to
22706 wait until the next invocation to get the start of the next region. */
22708 addrmap_index_data
.objfile
= objfile
;
22709 addrmap_index_data
.addr_obstack
= obstack
;
22710 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
22711 addrmap_index_data
.previous_valid
= 0;
22713 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
22714 &addrmap_index_data
);
22716 /* It's highly unlikely the last entry (end address = 0xff...ff)
22717 is valid, but we should still handle it.
22718 The end address is recorded as the start of the next region, but that
22719 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
22721 if (addrmap_index_data
.previous_valid
)
22722 add_address_entry (objfile
, obstack
,
22723 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
22724 addrmap_index_data
.previous_cu_index
);
22727 /* Return the symbol kind of PSYM. */
22729 static gdb_index_symbol_kind
22730 symbol_kind (struct partial_symbol
*psym
)
22732 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
22733 enum address_class aclass
= PSYMBOL_CLASS (psym
);
22741 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
22743 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22745 case LOC_CONST_BYTES
:
22746 case LOC_OPTIMIZED_OUT
:
22748 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22750 /* Note: It's currently impossible to recognize psyms as enum values
22751 short of reading the type info. For now punt. */
22752 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
22754 /* There are other LOC_FOO values that one might want to classify
22755 as variables, but dwarf2read.c doesn't currently use them. */
22756 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22758 case STRUCT_DOMAIN
:
22759 return GDB_INDEX_SYMBOL_KIND_TYPE
;
22761 return GDB_INDEX_SYMBOL_KIND_OTHER
;
22765 /* Add a list of partial symbols to SYMTAB. */
22768 write_psymbols (struct mapped_symtab
*symtab
,
22770 struct partial_symbol
**psymp
,
22772 offset_type cu_index
,
22775 for (; count
-- > 0; ++psymp
)
22777 struct partial_symbol
*psym
= *psymp
;
22780 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
22781 error (_("Ada is not currently supported by the index"));
22783 /* Only add a given psymbol once. */
22784 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
22787 gdb_index_symbol_kind kind
= symbol_kind (psym
);
22790 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
22791 is_static
, kind
, cu_index
);
22796 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
22797 exception if there is an error. */
22800 write_obstack (FILE *file
, struct obstack
*obstack
)
22802 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
22804 != obstack_object_size (obstack
))
22805 error (_("couldn't data write to file"));
22808 /* Unlink a file if the argument is not NULL. */
22811 unlink_if_set (void *p
)
22813 char **filename
= p
;
22815 unlink (*filename
);
22818 /* A helper struct used when iterating over debug_types. */
22819 struct signatured_type_index_data
22821 struct objfile
*objfile
;
22822 struct mapped_symtab
*symtab
;
22823 struct obstack
*types_list
;
22828 /* A helper function that writes a single signatured_type to an
22832 write_one_signatured_type (void **slot
, void *d
)
22834 struct signatured_type_index_data
*info
= d
;
22835 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
22836 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
22839 write_psymbols (info
->symtab
,
22841 info
->objfile
->global_psymbols
.list
22842 + psymtab
->globals_offset
,
22843 psymtab
->n_global_syms
, info
->cu_index
,
22845 write_psymbols (info
->symtab
,
22847 info
->objfile
->static_psymbols
.list
22848 + psymtab
->statics_offset
,
22849 psymtab
->n_static_syms
, info
->cu_index
,
22852 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22853 entry
->per_cu
.offset
.sect_off
);
22854 obstack_grow (info
->types_list
, val
, 8);
22855 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22856 entry
->type_offset_in_tu
.cu_off
);
22857 obstack_grow (info
->types_list
, val
, 8);
22858 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
22859 obstack_grow (info
->types_list
, val
, 8);
22866 /* Recurse into all "included" dependencies and write their symbols as
22867 if they appeared in this psymtab. */
22870 recursively_write_psymbols (struct objfile
*objfile
,
22871 struct partial_symtab
*psymtab
,
22872 struct mapped_symtab
*symtab
,
22874 offset_type cu_index
)
22878 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
22879 if (psymtab
->dependencies
[i
]->user
!= NULL
)
22880 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
22881 symtab
, psyms_seen
, cu_index
);
22883 write_psymbols (symtab
,
22885 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
22886 psymtab
->n_global_syms
, cu_index
,
22888 write_psymbols (symtab
,
22890 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
22891 psymtab
->n_static_syms
, cu_index
,
22895 /* Create an index file for OBJFILE in the directory DIR. */
22898 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
22900 struct cleanup
*cleanup
;
22901 char *filename
, *cleanup_filename
;
22902 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
22903 struct obstack cu_list
, types_cu_list
;
22906 struct mapped_symtab
*symtab
;
22907 offset_type val
, size_of_contents
, total_len
;
22910 htab_t cu_index_htab
;
22911 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
22913 if (dwarf2_per_objfile
->using_index
)
22914 error (_("Cannot use an index to create the index"));
22916 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
22917 error (_("Cannot make an index when the file has multiple .debug_types sections"));
22919 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
22922 if (stat (objfile_name (objfile
), &st
) < 0)
22923 perror_with_name (objfile_name (objfile
));
22925 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile_name (objfile
)),
22926 INDEX_SUFFIX
, (char *) NULL
);
22927 cleanup
= make_cleanup (xfree
, filename
);
22929 out_file
= gdb_fopen_cloexec (filename
, "wb");
22931 error (_("Can't open `%s' for writing"), filename
);
22933 cleanup_filename
= filename
;
22934 make_cleanup (unlink_if_set
, &cleanup_filename
);
22936 symtab
= create_mapped_symtab ();
22937 make_cleanup (cleanup_mapped_symtab
, symtab
);
22939 obstack_init (&addr_obstack
);
22940 make_cleanup_obstack_free (&addr_obstack
);
22942 obstack_init (&cu_list
);
22943 make_cleanup_obstack_free (&cu_list
);
22945 obstack_init (&types_cu_list
);
22946 make_cleanup_obstack_free (&types_cu_list
);
22948 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
22949 NULL
, xcalloc
, xfree
);
22950 make_cleanup_htab_delete (psyms_seen
);
22952 /* While we're scanning CU's create a table that maps a psymtab pointer
22953 (which is what addrmap records) to its index (which is what is recorded
22954 in the index file). This will later be needed to write the address
22956 cu_index_htab
= htab_create_alloc (100,
22957 hash_psymtab_cu_index
,
22958 eq_psymtab_cu_index
,
22959 NULL
, xcalloc
, xfree
);
22960 make_cleanup_htab_delete (cu_index_htab
);
22961 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
22962 xmalloc (sizeof (struct psymtab_cu_index_map
)
22963 * dwarf2_per_objfile
->n_comp_units
);
22964 make_cleanup (xfree
, psymtab_cu_index_map
);
22966 /* The CU list is already sorted, so we don't need to do additional
22967 work here. Also, the debug_types entries do not appear in
22968 all_comp_units, but only in their own hash table. */
22969 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
22971 struct dwarf2_per_cu_data
*per_cu
22972 = dwarf2_per_objfile
->all_comp_units
[i
];
22973 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
22975 struct psymtab_cu_index_map
*map
;
22978 /* CU of a shared file from 'dwz -m' may be unused by this main file.
22979 It may be referenced from a local scope but in such case it does not
22980 need to be present in .gdb_index. */
22981 if (psymtab
== NULL
)
22984 if (psymtab
->user
== NULL
)
22985 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
22987 map
= &psymtab_cu_index_map
[i
];
22988 map
->psymtab
= psymtab
;
22990 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
22991 gdb_assert (slot
!= NULL
);
22992 gdb_assert (*slot
== NULL
);
22995 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
22996 per_cu
->offset
.sect_off
);
22997 obstack_grow (&cu_list
, val
, 8);
22998 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
22999 obstack_grow (&cu_list
, val
, 8);
23002 /* Dump the address map. */
23003 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
23005 /* Write out the .debug_type entries, if any. */
23006 if (dwarf2_per_objfile
->signatured_types
)
23008 struct signatured_type_index_data sig_data
;
23010 sig_data
.objfile
= objfile
;
23011 sig_data
.symtab
= symtab
;
23012 sig_data
.types_list
= &types_cu_list
;
23013 sig_data
.psyms_seen
= psyms_seen
;
23014 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23015 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23016 write_one_signatured_type
, &sig_data
);
23019 /* Now that we've processed all symbols we can shrink their cu_indices
23021 uniquify_cu_indices (symtab
);
23023 obstack_init (&constant_pool
);
23024 make_cleanup_obstack_free (&constant_pool
);
23025 obstack_init (&symtab_obstack
);
23026 make_cleanup_obstack_free (&symtab_obstack
);
23027 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
23029 obstack_init (&contents
);
23030 make_cleanup_obstack_free (&contents
);
23031 size_of_contents
= 6 * sizeof (offset_type
);
23032 total_len
= size_of_contents
;
23034 /* The version number. */
23035 val
= MAYBE_SWAP (8);
23036 obstack_grow (&contents
, &val
, sizeof (val
));
23038 /* The offset of the CU list from the start of the file. */
23039 val
= MAYBE_SWAP (total_len
);
23040 obstack_grow (&contents
, &val
, sizeof (val
));
23041 total_len
+= obstack_object_size (&cu_list
);
23043 /* The offset of the types CU list from the start of the file. */
23044 val
= MAYBE_SWAP (total_len
);
23045 obstack_grow (&contents
, &val
, sizeof (val
));
23046 total_len
+= obstack_object_size (&types_cu_list
);
23048 /* The offset of the address table from the start of the file. */
23049 val
= MAYBE_SWAP (total_len
);
23050 obstack_grow (&contents
, &val
, sizeof (val
));
23051 total_len
+= obstack_object_size (&addr_obstack
);
23053 /* The offset of the symbol table from the start of the file. */
23054 val
= MAYBE_SWAP (total_len
);
23055 obstack_grow (&contents
, &val
, sizeof (val
));
23056 total_len
+= obstack_object_size (&symtab_obstack
);
23058 /* The offset of the constant pool from the start of the file. */
23059 val
= MAYBE_SWAP (total_len
);
23060 obstack_grow (&contents
, &val
, sizeof (val
));
23061 total_len
+= obstack_object_size (&constant_pool
);
23063 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
23065 write_obstack (out_file
, &contents
);
23066 write_obstack (out_file
, &cu_list
);
23067 write_obstack (out_file
, &types_cu_list
);
23068 write_obstack (out_file
, &addr_obstack
);
23069 write_obstack (out_file
, &symtab_obstack
);
23070 write_obstack (out_file
, &constant_pool
);
23074 /* We want to keep the file, so we set cleanup_filename to NULL
23075 here. See unlink_if_set. */
23076 cleanup_filename
= NULL
;
23078 do_cleanups (cleanup
);
23081 /* Implementation of the `save gdb-index' command.
23083 Note that the file format used by this command is documented in the
23084 GDB manual. Any changes here must be documented there. */
23087 save_gdb_index_command (char *arg
, int from_tty
)
23089 struct objfile
*objfile
;
23092 error (_("usage: save gdb-index DIRECTORY"));
23094 ALL_OBJFILES (objfile
)
23098 /* If the objfile does not correspond to an actual file, skip it. */
23099 if (stat (objfile_name (objfile
), &st
) < 0)
23102 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
23103 if (dwarf2_per_objfile
)
23105 volatile struct gdb_exception except
;
23107 TRY_CATCH (except
, RETURN_MASK_ERROR
)
23109 write_psymtabs_to_index (objfile
, arg
);
23111 if (except
.reason
< 0)
23112 exception_fprintf (gdb_stderr
, except
,
23113 _("Error while writing index for `%s': "),
23114 objfile_name (objfile
));
23121 int dwarf2_always_disassemble
;
23124 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
23125 struct cmd_list_element
*c
, const char *value
)
23127 fprintf_filtered (file
,
23128 _("Whether to always disassemble "
23129 "DWARF expressions is %s.\n"),
23134 show_check_physname (struct ui_file
*file
, int from_tty
,
23135 struct cmd_list_element
*c
, const char *value
)
23137 fprintf_filtered (file
,
23138 _("Whether to check \"physname\" is %s.\n"),
23142 void _initialize_dwarf2_read (void);
23145 _initialize_dwarf2_read (void)
23147 struct cmd_list_element
*c
;
23149 dwarf2_objfile_data_key
23150 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
23152 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
23153 Set DWARF 2 specific variables.\n\
23154 Configure DWARF 2 variables such as the cache size"),
23155 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
23156 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23158 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
23159 Show DWARF 2 specific variables\n\
23160 Show DWARF 2 variables such as the cache size"),
23161 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
23162 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23164 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23165 &dwarf2_max_cache_age
, _("\
23166 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
23167 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
23168 A higher limit means that cached compilation units will be stored\n\
23169 in memory longer, and more total memory will be used. Zero disables\n\
23170 caching, which can slow down startup."),
23172 show_dwarf2_max_cache_age
,
23173 &set_dwarf2_cmdlist
,
23174 &show_dwarf2_cmdlist
);
23176 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
23177 &dwarf2_always_disassemble
, _("\
23178 Set whether `info address' always disassembles DWARF expressions."), _("\
23179 Show whether `info address' always disassembles DWARF expressions."), _("\
23180 When enabled, DWARF expressions are always printed in an assembly-like\n\
23181 syntax. When disabled, expressions will be printed in a more\n\
23182 conversational style, when possible."),
23184 show_dwarf2_always_disassemble
,
23185 &set_dwarf2_cmdlist
,
23186 &show_dwarf2_cmdlist
);
23188 add_setshow_zuinteger_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
23189 Set debugging of the dwarf2 reader."), _("\
23190 Show debugging of the dwarf2 reader."), _("\
23191 When enabled (non-zero), debugging messages are printed during dwarf2\n\
23192 reading and symtab expansion. A value of 1 (one) provides basic\n\
23193 information. A value greater than 1 provides more verbose information."),
23196 &setdebuglist
, &showdebuglist
);
23198 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
23199 Set debugging of the dwarf2 DIE reader."), _("\
23200 Show debugging of the dwarf2 DIE reader."), _("\
23201 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23202 The value is the maximum depth to print."),
23205 &setdebuglist
, &showdebuglist
);
23207 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23208 Set cross-checking of \"physname\" code against demangler."), _("\
23209 Show cross-checking of \"physname\" code against demangler."), _("\
23210 When enabled, GDB's internal \"physname\" code is checked against\n\
23212 NULL
, show_check_physname
,
23213 &setdebuglist
, &showdebuglist
);
23215 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23216 no_class
, &use_deprecated_index_sections
, _("\
23217 Set whether to use deprecated gdb_index sections."), _("\
23218 Show whether to use deprecated gdb_index sections."), _("\
23219 When enabled, deprecated .gdb_index sections are used anyway.\n\
23220 Normally they are ignored either because of a missing feature or\n\
23221 performance issue.\n\
23222 Warning: This option must be enabled before gdb reads the file."),
23225 &setlist
, &showlist
);
23227 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
23229 Save a gdb-index file.\n\
23230 Usage: save gdb-index DIRECTORY"),
23232 set_cmd_completer (c
, filename_completer
);
23234 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23235 &dwarf2_locexpr_funcs
);
23236 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
23237 &dwarf2_loclist_funcs
);
23239 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23240 &dwarf2_block_frame_base_locexpr_funcs
);
23241 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
23242 &dwarf2_block_frame_base_loclist_funcs
);