1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2017 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"
58 #include "completer.h"
63 #include "gdbcore.h" /* for gnutarget */
64 #include "gdb/gdb-index.h"
69 #include "filestuff.h"
71 #include "namespace.h"
72 #include "common/gdb_unlinker.h"
73 #include "common/function-view.h"
74 #include "common/gdb_optional.h"
75 #include "common/underlying.h"
76 #include "common/byte-vector.h"
77 #include "filename-seen-cache.h"
79 #include <sys/types.h>
81 #include <unordered_set>
82 #include <unordered_map>
84 typedef struct symbol
*symbolp
;
87 /* When == 1, print basic high level tracing messages.
88 When > 1, be more verbose.
89 This is in contrast to the low level DIE reading of dwarf_die_debug. */
90 static unsigned int dwarf_read_debug
= 0;
92 /* When non-zero, dump DIEs after they are read in. */
93 static unsigned int dwarf_die_debug
= 0;
95 /* When non-zero, dump line number entries as they are read in. */
96 static unsigned int dwarf_line_debug
= 0;
98 /* When non-zero, cross-check physname against demangler. */
99 static int check_physname
= 0;
101 /* When non-zero, do not reject deprecated .gdb_index sections. */
102 static int use_deprecated_index_sections
= 0;
104 static const struct objfile_data
*dwarf2_objfile_data_key
;
106 /* The "aclass" indices for various kinds of computed DWARF symbols. */
108 static int dwarf2_locexpr_index
;
109 static int dwarf2_loclist_index
;
110 static int dwarf2_locexpr_block_index
;
111 static int dwarf2_loclist_block_index
;
113 /* A descriptor for dwarf sections.
115 S.ASECTION, SIZE are typically initialized when the objfile is first
116 scanned. BUFFER, READIN are filled in later when the section is read.
117 If the section contained compressed data then SIZE is updated to record
118 the uncompressed size of the section.
120 DWP file format V2 introduces a wrinkle that is easiest to handle by
121 creating the concept of virtual sections contained within a real section.
122 In DWP V2 the sections of the input DWO files are concatenated together
123 into one section, but section offsets are kept relative to the original
125 If this is a virtual dwp-v2 section, S.CONTAINING_SECTION is a backlink to
126 the real section this "virtual" section is contained in, and BUFFER,SIZE
127 describe the virtual section. */
129 struct dwarf2_section_info
133 /* If this is a real section, the bfd section. */
135 /* If this is a virtual section, pointer to the containing ("real")
137 struct dwarf2_section_info
*containing_section
;
139 /* Pointer to section data, only valid if readin. */
140 const gdb_byte
*buffer
;
141 /* The size of the section, real or virtual. */
143 /* If this is a virtual section, the offset in the real section.
144 Only valid if is_virtual. */
145 bfd_size_type virtual_offset
;
146 /* True if we have tried to read this section. */
148 /* True if this is a virtual section, False otherwise.
149 This specifies which of s.section and s.containing_section to use. */
153 typedef struct dwarf2_section_info dwarf2_section_info_def
;
154 DEF_VEC_O (dwarf2_section_info_def
);
156 /* All offsets in the index are of this type. It must be
157 architecture-independent. */
158 typedef uint32_t offset_type
;
160 DEF_VEC_I (offset_type
);
162 /* Ensure only legit values are used. */
163 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
165 gdb_assert ((unsigned int) (value) <= 1); \
166 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
169 /* Ensure only legit values are used. */
170 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
172 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
173 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
174 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
177 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
178 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
180 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
181 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
184 /* A description of the mapped index. The file format is described in
185 a comment by the code that writes the index. */
188 /* Index data format version. */
191 /* The total length of the buffer. */
194 /* A pointer to the address table data. */
195 const gdb_byte
*address_table
;
197 /* Size of the address table data in bytes. */
198 offset_type address_table_size
;
200 /* The symbol table, implemented as a hash table. */
201 const offset_type
*symbol_table
;
203 /* Size in slots, each slot is 2 offset_types. */
204 offset_type symbol_table_slots
;
206 /* A pointer to the constant pool. */
207 const char *constant_pool
;
210 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
211 DEF_VEC_P (dwarf2_per_cu_ptr
);
215 int nr_uniq_abbrev_tables
;
217 int nr_symtab_sharers
;
218 int nr_stmt_less_type_units
;
219 int nr_all_type_units_reallocs
;
222 /* Collection of data recorded per objfile.
223 This hangs off of dwarf2_objfile_data_key. */
225 struct dwarf2_per_objfile
227 /* Construct a dwarf2_per_objfile for OBJFILE. NAMES points to the
228 dwarf2 section names, or is NULL if the standard ELF names are
230 dwarf2_per_objfile (struct objfile
*objfile
,
231 const dwarf2_debug_sections
*names
);
233 ~dwarf2_per_objfile ();
236 dwarf2_per_objfile (const dwarf2_per_objfile
&) = delete;
237 void operator= (const dwarf2_per_objfile
&) = delete;
239 /* Free all cached compilation units. */
240 void free_cached_comp_units ();
242 /* This function is mapped across the sections and remembers the
243 offset and size of each of the debugging sections we are
245 void locate_sections (bfd
*abfd
, asection
*sectp
,
246 const dwarf2_debug_sections
&names
);
249 dwarf2_section_info info
{};
250 dwarf2_section_info abbrev
{};
251 dwarf2_section_info line
{};
252 dwarf2_section_info loc
{};
253 dwarf2_section_info loclists
{};
254 dwarf2_section_info macinfo
{};
255 dwarf2_section_info macro
{};
256 dwarf2_section_info str
{};
257 dwarf2_section_info line_str
{};
258 dwarf2_section_info ranges
{};
259 dwarf2_section_info rnglists
{};
260 dwarf2_section_info addr
{};
261 dwarf2_section_info frame
{};
262 dwarf2_section_info eh_frame
{};
263 dwarf2_section_info gdb_index
{};
265 VEC (dwarf2_section_info_def
) *types
= NULL
;
268 struct objfile
*objfile
= NULL
;
270 /* Table of all the compilation units. This is used to locate
271 the target compilation unit of a particular reference. */
272 struct dwarf2_per_cu_data
**all_comp_units
= NULL
;
274 /* The number of compilation units in ALL_COMP_UNITS. */
275 int n_comp_units
= 0;
277 /* The number of .debug_types-related CUs. */
278 int n_type_units
= 0;
280 /* The number of elements allocated in all_type_units.
281 If there are skeleton-less TUs, we add them to all_type_units lazily. */
282 int n_allocated_type_units
= 0;
284 /* The .debug_types-related CUs (TUs).
285 This is stored in malloc space because we may realloc it. */
286 struct signatured_type
**all_type_units
= NULL
;
288 /* Table of struct type_unit_group objects.
289 The hash key is the DW_AT_stmt_list value. */
290 htab_t type_unit_groups
{};
292 /* A table mapping .debug_types signatures to its signatured_type entry.
293 This is NULL if the .debug_types section hasn't been read in yet. */
294 htab_t signatured_types
{};
296 /* Type unit statistics, to see how well the scaling improvements
298 struct tu_stats tu_stats
{};
300 /* A chain of compilation units that are currently read in, so that
301 they can be freed later. */
302 dwarf2_per_cu_data
*read_in_chain
= NULL
;
304 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
305 This is NULL if the table hasn't been allocated yet. */
308 /* True if we've checked for whether there is a DWP file. */
309 bool dwp_checked
= false;
311 /* The DWP file if there is one, or NULL. */
312 struct dwp_file
*dwp_file
= NULL
;
314 /* The shared '.dwz' file, if one exists. This is used when the
315 original data was compressed using 'dwz -m'. */
316 struct dwz_file
*dwz_file
= NULL
;
318 /* A flag indicating whether this objfile has a section loaded at a
320 bool has_section_at_zero
= false;
322 /* True if we are using the mapped index,
323 or we are faking it for OBJF_READNOW's sake. */
324 bool using_index
= false;
326 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
327 mapped_index
*index_table
= NULL
;
329 /* When using index_table, this keeps track of all quick_file_names entries.
330 TUs typically share line table entries with a CU, so we maintain a
331 separate table of all line table entries to support the sharing.
332 Note that while there can be way more TUs than CUs, we've already
333 sorted all the TUs into "type unit groups", grouped by their
334 DW_AT_stmt_list value. Therefore the only sharing done here is with a
335 CU and its associated TU group if there is one. */
336 htab_t quick_file_names_table
{};
338 /* Set during partial symbol reading, to prevent queueing of full
340 bool reading_partial_symbols
= false;
342 /* Table mapping type DIEs to their struct type *.
343 This is NULL if not allocated yet.
344 The mapping is done via (CU/TU + DIE offset) -> type. */
345 htab_t die_type_hash
{};
347 /* The CUs we recently read. */
348 VEC (dwarf2_per_cu_ptr
) *just_read_cus
= NULL
;
350 /* Table containing line_header indexed by offset and offset_in_dwz. */
351 htab_t line_header_hash
{};
353 /* Table containing all filenames. This is an optional because the
354 table is lazily constructed on first access. */
355 gdb::optional
<filename_seen_cache
> filenames_cache
;
358 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
360 /* Default names of the debugging sections. */
362 /* Note that if the debugging section has been compressed, it might
363 have a name like .zdebug_info. */
365 static const struct dwarf2_debug_sections dwarf2_elf_names
=
367 { ".debug_info", ".zdebug_info" },
368 { ".debug_abbrev", ".zdebug_abbrev" },
369 { ".debug_line", ".zdebug_line" },
370 { ".debug_loc", ".zdebug_loc" },
371 { ".debug_loclists", ".zdebug_loclists" },
372 { ".debug_macinfo", ".zdebug_macinfo" },
373 { ".debug_macro", ".zdebug_macro" },
374 { ".debug_str", ".zdebug_str" },
375 { ".debug_line_str", ".zdebug_line_str" },
376 { ".debug_ranges", ".zdebug_ranges" },
377 { ".debug_rnglists", ".zdebug_rnglists" },
378 { ".debug_types", ".zdebug_types" },
379 { ".debug_addr", ".zdebug_addr" },
380 { ".debug_frame", ".zdebug_frame" },
381 { ".eh_frame", NULL
},
382 { ".gdb_index", ".zgdb_index" },
386 /* List of DWO/DWP sections. */
388 static const struct dwop_section_names
390 struct dwarf2_section_names abbrev_dwo
;
391 struct dwarf2_section_names info_dwo
;
392 struct dwarf2_section_names line_dwo
;
393 struct dwarf2_section_names loc_dwo
;
394 struct dwarf2_section_names loclists_dwo
;
395 struct dwarf2_section_names macinfo_dwo
;
396 struct dwarf2_section_names macro_dwo
;
397 struct dwarf2_section_names str_dwo
;
398 struct dwarf2_section_names str_offsets_dwo
;
399 struct dwarf2_section_names types_dwo
;
400 struct dwarf2_section_names cu_index
;
401 struct dwarf2_section_names tu_index
;
405 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
406 { ".debug_info.dwo", ".zdebug_info.dwo" },
407 { ".debug_line.dwo", ".zdebug_line.dwo" },
408 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
409 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
410 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
411 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
412 { ".debug_str.dwo", ".zdebug_str.dwo" },
413 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
414 { ".debug_types.dwo", ".zdebug_types.dwo" },
415 { ".debug_cu_index", ".zdebug_cu_index" },
416 { ".debug_tu_index", ".zdebug_tu_index" },
419 /* local data types */
421 /* The data in a compilation unit header, after target2host
422 translation, looks like this. */
423 struct comp_unit_head
427 unsigned char addr_size
;
428 unsigned char signed_addr_p
;
429 sect_offset abbrev_sect_off
;
431 /* Size of file offsets; either 4 or 8. */
432 unsigned int offset_size
;
434 /* Size of the length field; either 4 or 12. */
435 unsigned int initial_length_size
;
437 enum dwarf_unit_type unit_type
;
439 /* Offset to the first byte of this compilation unit header in the
440 .debug_info section, for resolving relative reference dies. */
441 sect_offset sect_off
;
443 /* Offset to first die in this cu from the start of the cu.
444 This will be the first byte following the compilation unit header. */
445 cu_offset first_die_cu_offset
;
447 /* 64-bit signature of this type unit - it is valid only for
448 UNIT_TYPE DW_UT_type. */
451 /* For types, offset in the type's DIE of the type defined by this TU. */
452 cu_offset type_cu_offset_in_tu
;
455 /* Type used for delaying computation of method physnames.
456 See comments for compute_delayed_physnames. */
457 struct delayed_method_info
459 /* The type to which the method is attached, i.e., its parent class. */
462 /* The index of the method in the type's function fieldlists. */
465 /* The index of the method in the fieldlist. */
468 /* The name of the DIE. */
471 /* The DIE associated with this method. */
472 struct die_info
*die
;
475 typedef struct delayed_method_info delayed_method_info
;
476 DEF_VEC_O (delayed_method_info
);
478 /* Internal state when decoding a particular compilation unit. */
481 /* The objfile containing this compilation unit. */
482 struct objfile
*objfile
;
484 /* The header of the compilation unit. */
485 struct comp_unit_head header
;
487 /* Base address of this compilation unit. */
488 CORE_ADDR base_address
;
490 /* Non-zero if base_address has been set. */
493 /* The language we are debugging. */
494 enum language language
;
495 const struct language_defn
*language_defn
;
497 const char *producer
;
499 /* The generic symbol table building routines have separate lists for
500 file scope symbols and all all other scopes (local scopes). So
501 we need to select the right one to pass to add_symbol_to_list().
502 We do it by keeping a pointer to the correct list in list_in_scope.
504 FIXME: The original dwarf code just treated the file scope as the
505 first local scope, and all other local scopes as nested local
506 scopes, and worked fine. Check to see if we really need to
507 distinguish these in buildsym.c. */
508 struct pending
**list_in_scope
;
510 /* The abbrev table for this CU.
511 Normally this points to the abbrev table in the objfile.
512 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
513 struct abbrev_table
*abbrev_table
;
515 /* Hash table holding all the loaded partial DIEs
516 with partial_die->offset.SECT_OFF as hash. */
519 /* Storage for things with the same lifetime as this read-in compilation
520 unit, including partial DIEs. */
521 struct obstack comp_unit_obstack
;
523 /* When multiple dwarf2_cu structures are living in memory, this field
524 chains them all together, so that they can be released efficiently.
525 We will probably also want a generation counter so that most-recently-used
526 compilation units are cached... */
527 struct dwarf2_per_cu_data
*read_in_chain
;
529 /* Backlink to our per_cu entry. */
530 struct dwarf2_per_cu_data
*per_cu
;
532 /* How many compilation units ago was this CU last referenced? */
535 /* A hash table of DIE cu_offset for following references with
536 die_info->offset.sect_off as hash. */
539 /* Full DIEs if read in. */
540 struct die_info
*dies
;
542 /* A set of pointers to dwarf2_per_cu_data objects for compilation
543 units referenced by this one. Only set during full symbol processing;
544 partial symbol tables do not have dependencies. */
547 /* Header data from the line table, during full symbol processing. */
548 struct line_header
*line_header
;
549 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
550 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
551 this is the DW_TAG_compile_unit die for this CU. We'll hold on
552 to the line header as long as this DIE is being processed. See
553 process_die_scope. */
554 die_info
*line_header_die_owner
;
556 /* A list of methods which need to have physnames computed
557 after all type information has been read. */
558 VEC (delayed_method_info
) *method_list
;
560 /* To be copied to symtab->call_site_htab. */
561 htab_t call_site_htab
;
563 /* Non-NULL if this CU came from a DWO file.
564 There is an invariant here that is important to remember:
565 Except for attributes copied from the top level DIE in the "main"
566 (or "stub") file in preparation for reading the DWO file
567 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
568 Either there isn't a DWO file (in which case this is NULL and the point
569 is moot), or there is and either we're not going to read it (in which
570 case this is NULL) or there is and we are reading it (in which case this
572 struct dwo_unit
*dwo_unit
;
574 /* The DW_AT_addr_base attribute if present, zero otherwise
575 (zero is a valid value though).
576 Note this value comes from the Fission stub CU/TU's DIE. */
579 /* The DW_AT_ranges_base attribute if present, zero otherwise
580 (zero is a valid value though).
581 Note this value comes from the Fission stub CU/TU's DIE.
582 Also note that the value is zero in the non-DWO case so this value can
583 be used without needing to know whether DWO files are in use or not.
584 N.B. This does not apply to DW_AT_ranges appearing in
585 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
586 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
587 DW_AT_ranges_base *would* have to be applied, and we'd have to care
588 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
589 ULONGEST ranges_base
;
591 /* Mark used when releasing cached dies. */
592 unsigned int mark
: 1;
594 /* This CU references .debug_loc. See the symtab->locations_valid field.
595 This test is imperfect as there may exist optimized debug code not using
596 any location list and still facing inlining issues if handled as
597 unoptimized code. For a future better test see GCC PR other/32998. */
598 unsigned int has_loclist
: 1;
600 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
601 if all the producer_is_* fields are valid. This information is cached
602 because profiling CU expansion showed excessive time spent in
603 producer_is_gxx_lt_4_6. */
604 unsigned int checked_producer
: 1;
605 unsigned int producer_is_gxx_lt_4_6
: 1;
606 unsigned int producer_is_gcc_lt_4_3
: 1;
607 unsigned int producer_is_icc
: 1;
609 /* When set, the file that we're processing is known to have
610 debugging info for C++ namespaces. GCC 3.3.x did not produce
611 this information, but later versions do. */
613 unsigned int processing_has_namespace_info
: 1;
616 /* Persistent data held for a compilation unit, even when not
617 processing it. We put a pointer to this structure in the
618 read_symtab_private field of the psymtab. */
620 struct dwarf2_per_cu_data
622 /* The start offset and length of this compilation unit.
623 NOTE: Unlike comp_unit_head.length, this length includes
625 If the DIE refers to a DWO file, this is always of the original die,
627 sect_offset sect_off
;
630 /* DWARF standard version this data has been read from (such as 4 or 5). */
633 /* Flag indicating this compilation unit will be read in before
634 any of the current compilation units are processed. */
635 unsigned int queued
: 1;
637 /* This flag will be set when reading partial DIEs if we need to load
638 absolutely all DIEs for this compilation unit, instead of just the ones
639 we think are interesting. It gets set if we look for a DIE in the
640 hash table and don't find it. */
641 unsigned int load_all_dies
: 1;
643 /* Non-zero if this CU is from .debug_types.
644 Struct dwarf2_per_cu_data is contained in struct signatured_type iff
646 unsigned int is_debug_types
: 1;
648 /* Non-zero if this CU is from the .dwz file. */
649 unsigned int is_dwz
: 1;
651 /* Non-zero if reading a TU directly from a DWO file, bypassing the stub.
652 This flag is only valid if is_debug_types is true.
653 We can't read a CU directly from a DWO file: There are required
654 attributes in the stub. */
655 unsigned int reading_dwo_directly
: 1;
657 /* Non-zero if the TU has been read.
658 This is used to assist the "Stay in DWO Optimization" for Fission:
659 When reading a DWO, it's faster to read TUs from the DWO instead of
660 fetching them from random other DWOs (due to comdat folding).
661 If the TU has already been read, the optimization is unnecessary
662 (and unwise - we don't want to change where gdb thinks the TU lives
664 This flag is only valid if is_debug_types is true. */
665 unsigned int tu_read
: 1;
667 /* The section this CU/TU lives in.
668 If the DIE refers to a DWO file, this is always the original die,
670 struct dwarf2_section_info
*section
;
672 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
673 of the CU cache it gets reset to NULL again. This is left as NULL for
674 dummy CUs (a CU header, but nothing else). */
675 struct dwarf2_cu
*cu
;
677 /* The corresponding objfile.
678 Normally we can get the objfile from dwarf2_per_objfile.
679 However we can enter this file with just a "per_cu" handle. */
680 struct objfile
*objfile
;
682 /* When dwarf2_per_objfile->using_index is true, the 'quick' field
683 is active. Otherwise, the 'psymtab' field is active. */
686 /* The partial symbol table associated with this compilation unit,
687 or NULL for unread partial units. */
688 struct partial_symtab
*psymtab
;
690 /* Data needed by the "quick" functions. */
691 struct dwarf2_per_cu_quick_data
*quick
;
694 /* The CUs we import using DW_TAG_imported_unit. This is filled in
695 while reading psymtabs, used to compute the psymtab dependencies,
696 and then cleared. Then it is filled in again while reading full
697 symbols, and only deleted when the objfile is destroyed.
699 This is also used to work around a difference between the way gold
700 generates .gdb_index version <=7 and the way gdb does. Arguably this
701 is a gold bug. For symbols coming from TUs, gold records in the index
702 the CU that includes the TU instead of the TU itself. This breaks
703 dw2_lookup_symbol: It assumes that if the index says symbol X lives
704 in CU/TU Y, then one need only expand Y and a subsequent lookup in Y
705 will find X. Alas TUs live in their own symtab, so after expanding CU Y
706 we need to look in TU Z to find X. Fortunately, this is akin to
707 DW_TAG_imported_unit, so we just use the same mechanism: For
708 .gdb_index version <=7 this also records the TUs that the CU referred
709 to. Concurrently with this change gdb was modified to emit version 8
710 indices so we only pay a price for gold generated indices.
711 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
712 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
715 /* Entry in the signatured_types hash table. */
717 struct signatured_type
719 /* The "per_cu" object of this type.
720 This struct is used iff per_cu.is_debug_types.
721 N.B.: This is the first member so that it's easy to convert pointers
723 struct dwarf2_per_cu_data per_cu
;
725 /* The type's signature. */
728 /* Offset in the TU of the type's DIE, as read from the TU header.
729 If this TU is a DWO stub and the definition lives in a DWO file
730 (specified by DW_AT_GNU_dwo_name), this value is unusable. */
731 cu_offset type_offset_in_tu
;
733 /* Offset in the section of the type's DIE.
734 If the definition lives in a DWO file, this is the offset in the
735 .debug_types.dwo section.
736 The value is zero until the actual value is known.
737 Zero is otherwise not a valid section offset. */
738 sect_offset type_offset_in_section
;
740 /* Type units are grouped by their DW_AT_stmt_list entry so that they
741 can share them. This points to the containing symtab. */
742 struct type_unit_group
*type_unit_group
;
745 The first time we encounter this type we fully read it in and install it
746 in the symbol tables. Subsequent times we only need the type. */
749 /* Containing DWO unit.
750 This field is valid iff per_cu.reading_dwo_directly. */
751 struct dwo_unit
*dwo_unit
;
754 typedef struct signatured_type
*sig_type_ptr
;
755 DEF_VEC_P (sig_type_ptr
);
757 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
758 This includes type_unit_group and quick_file_names. */
760 struct stmt_list_hash
762 /* The DWO unit this table is from or NULL if there is none. */
763 struct dwo_unit
*dwo_unit
;
765 /* Offset in .debug_line or .debug_line.dwo. */
766 sect_offset line_sect_off
;
769 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
770 an object of this type. */
772 struct type_unit_group
774 /* dwarf2read.c's main "handle" on a TU symtab.
775 To simplify things we create an artificial CU that "includes" all the
776 type units using this stmt_list so that the rest of the code still has
777 a "per_cu" handle on the symtab.
778 This PER_CU is recognized by having no section. */
779 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
780 struct dwarf2_per_cu_data per_cu
;
782 /* The TUs that share this DW_AT_stmt_list entry.
783 This is added to while parsing type units to build partial symtabs,
784 and is deleted afterwards and not used again. */
785 VEC (sig_type_ptr
) *tus
;
787 /* The compunit symtab.
788 Type units in a group needn't all be defined in the same source file,
789 so we create an essentially anonymous symtab as the compunit symtab. */
790 struct compunit_symtab
*compunit_symtab
;
792 /* The data used to construct the hash key. */
793 struct stmt_list_hash hash
;
795 /* The number of symtabs from the line header.
796 The value here must match line_header.num_file_names. */
797 unsigned int num_symtabs
;
799 /* The symbol tables for this TU (obtained from the files listed in
801 WARNING: The order of entries here must match the order of entries
802 in the line header. After the first TU using this type_unit_group, the
803 line header for the subsequent TUs is recreated from this. This is done
804 because we need to use the same symtabs for each TU using the same
805 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
806 there's no guarantee the line header doesn't have duplicate entries. */
807 struct symtab
**symtabs
;
810 /* These sections are what may appear in a (real or virtual) DWO file. */
814 struct dwarf2_section_info abbrev
;
815 struct dwarf2_section_info line
;
816 struct dwarf2_section_info loc
;
817 struct dwarf2_section_info loclists
;
818 struct dwarf2_section_info macinfo
;
819 struct dwarf2_section_info macro
;
820 struct dwarf2_section_info str
;
821 struct dwarf2_section_info str_offsets
;
822 /* In the case of a virtual DWO file, these two are unused. */
823 struct dwarf2_section_info info
;
824 VEC (dwarf2_section_info_def
) *types
;
827 /* CUs/TUs in DWP/DWO files. */
831 /* Backlink to the containing struct dwo_file. */
832 struct dwo_file
*dwo_file
;
834 /* The "id" that distinguishes this CU/TU.
835 .debug_info calls this "dwo_id", .debug_types calls this "signature".
836 Since signatures came first, we stick with it for consistency. */
839 /* The section this CU/TU lives in, in the DWO file. */
840 struct dwarf2_section_info
*section
;
842 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
843 sect_offset sect_off
;
846 /* For types, offset in the type's DIE of the type defined by this TU. */
847 cu_offset type_offset_in_tu
;
850 /* include/dwarf2.h defines the DWP section codes.
851 It defines a max value but it doesn't define a min value, which we
852 use for error checking, so provide one. */
854 enum dwp_v2_section_ids
859 /* Data for one DWO file.
861 This includes virtual DWO files (a virtual DWO file is a DWO file as it
862 appears in a DWP file). DWP files don't really have DWO files per se -
863 comdat folding of types "loses" the DWO file they came from, and from
864 a high level view DWP files appear to contain a mass of random types.
865 However, to maintain consistency with the non-DWP case we pretend DWP
866 files contain virtual DWO files, and we assign each TU with one virtual
867 DWO file (generally based on the line and abbrev section offsets -
868 a heuristic that seems to work in practice). */
872 /* The DW_AT_GNU_dwo_name attribute.
873 For virtual DWO files the name is constructed from the section offsets
874 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
875 from related CU+TUs. */
876 const char *dwo_name
;
878 /* The DW_AT_comp_dir attribute. */
879 const char *comp_dir
;
881 /* The bfd, when the file is open. Otherwise this is NULL.
882 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
885 /* The sections that make up this DWO file.
886 Remember that for virtual DWO files in DWP V2, these are virtual
887 sections (for lack of a better name). */
888 struct dwo_sections sections
;
890 /* The CUs in the file.
891 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
892 an extension to handle LLVM's Link Time Optimization output (where
893 multiple source files may be compiled into a single object/dwo pair). */
896 /* Table of TUs in the file.
897 Each element is a struct dwo_unit. */
901 /* These sections are what may appear in a DWP file. */
905 /* These are used by both DWP version 1 and 2. */
906 struct dwarf2_section_info str
;
907 struct dwarf2_section_info cu_index
;
908 struct dwarf2_section_info tu_index
;
910 /* These are only used by DWP version 2 files.
911 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
912 sections are referenced by section number, and are not recorded here.
913 In DWP version 2 there is at most one copy of all these sections, each
914 section being (effectively) comprised of the concatenation of all of the
915 individual sections that exist in the version 1 format.
916 To keep the code simple we treat each of these concatenated pieces as a
917 section itself (a virtual section?). */
918 struct dwarf2_section_info abbrev
;
919 struct dwarf2_section_info info
;
920 struct dwarf2_section_info line
;
921 struct dwarf2_section_info loc
;
922 struct dwarf2_section_info macinfo
;
923 struct dwarf2_section_info macro
;
924 struct dwarf2_section_info str_offsets
;
925 struct dwarf2_section_info types
;
928 /* These sections are what may appear in a virtual DWO file in DWP version 1.
929 A virtual DWO file is a DWO file as it appears in a DWP file. */
931 struct virtual_v1_dwo_sections
933 struct dwarf2_section_info abbrev
;
934 struct dwarf2_section_info line
;
935 struct dwarf2_section_info loc
;
936 struct dwarf2_section_info macinfo
;
937 struct dwarf2_section_info macro
;
938 struct dwarf2_section_info str_offsets
;
939 /* Each DWP hash table entry records one CU or one TU.
940 That is recorded here, and copied to dwo_unit.section. */
941 struct dwarf2_section_info info_or_types
;
944 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
945 In version 2, the sections of the DWO files are concatenated together
946 and stored in one section of that name. Thus each ELF section contains
947 several "virtual" sections. */
949 struct virtual_v2_dwo_sections
951 bfd_size_type abbrev_offset
;
952 bfd_size_type abbrev_size
;
954 bfd_size_type line_offset
;
955 bfd_size_type line_size
;
957 bfd_size_type loc_offset
;
958 bfd_size_type loc_size
;
960 bfd_size_type macinfo_offset
;
961 bfd_size_type macinfo_size
;
963 bfd_size_type macro_offset
;
964 bfd_size_type macro_size
;
966 bfd_size_type str_offsets_offset
;
967 bfd_size_type str_offsets_size
;
969 /* Each DWP hash table entry records one CU or one TU.
970 That is recorded here, and copied to dwo_unit.section. */
971 bfd_size_type info_or_types_offset
;
972 bfd_size_type info_or_types_size
;
975 /* Contents of DWP hash tables. */
977 struct dwp_hash_table
979 uint32_t version
, nr_columns
;
980 uint32_t nr_units
, nr_slots
;
981 const gdb_byte
*hash_table
, *unit_table
;
986 const gdb_byte
*indices
;
990 /* This is indexed by column number and gives the id of the section
992 #define MAX_NR_V2_DWO_SECTIONS \
993 (1 /* .debug_info or .debug_types */ \
994 + 1 /* .debug_abbrev */ \
995 + 1 /* .debug_line */ \
996 + 1 /* .debug_loc */ \
997 + 1 /* .debug_str_offsets */ \
998 + 1 /* .debug_macro or .debug_macinfo */)
999 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
1000 const gdb_byte
*offsets
;
1001 const gdb_byte
*sizes
;
1006 /* Data for one DWP file. */
1010 /* Name of the file. */
1013 /* File format version. */
1019 /* Section info for this file. */
1020 struct dwp_sections sections
;
1022 /* Table of CUs in the file. */
1023 const struct dwp_hash_table
*cus
;
1025 /* Table of TUs in the file. */
1026 const struct dwp_hash_table
*tus
;
1028 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
1032 /* Table to map ELF section numbers to their sections.
1033 This is only needed for the DWP V1 file format. */
1034 unsigned int num_sections
;
1035 asection
**elf_sections
;
1038 /* This represents a '.dwz' file. */
1042 /* A dwz file can only contain a few sections. */
1043 struct dwarf2_section_info abbrev
;
1044 struct dwarf2_section_info info
;
1045 struct dwarf2_section_info str
;
1046 struct dwarf2_section_info line
;
1047 struct dwarf2_section_info macro
;
1048 struct dwarf2_section_info gdb_index
;
1050 /* The dwz's BFD. */
1054 /* Struct used to pass misc. parameters to read_die_and_children, et
1055 al. which are used for both .debug_info and .debug_types dies.
1056 All parameters here are unchanging for the life of the call. This
1057 struct exists to abstract away the constant parameters of die reading. */
1059 struct die_reader_specs
1061 /* The bfd of die_section. */
1064 /* The CU of the DIE we are parsing. */
1065 struct dwarf2_cu
*cu
;
1067 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
1068 struct dwo_file
*dwo_file
;
1070 /* The section the die comes from.
1071 This is either .debug_info or .debug_types, or the .dwo variants. */
1072 struct dwarf2_section_info
*die_section
;
1074 /* die_section->buffer. */
1075 const gdb_byte
*buffer
;
1077 /* The end of the buffer. */
1078 const gdb_byte
*buffer_end
;
1080 /* The value of the DW_AT_comp_dir attribute. */
1081 const char *comp_dir
;
1084 /* Type of function passed to init_cutu_and_read_dies, et.al. */
1085 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
1086 const gdb_byte
*info_ptr
,
1087 struct die_info
*comp_unit_die
,
1091 /* A 1-based directory index. This is a strong typedef to prevent
1092 accidentally using a directory index as a 0-based index into an
1094 enum class dir_index
: unsigned int {};
1096 /* Likewise, a 1-based file name index. */
1097 enum class file_name_index
: unsigned int {};
1101 file_entry () = default;
1103 file_entry (const char *name_
, dir_index d_index_
,
1104 unsigned int mod_time_
, unsigned int length_
)
1107 mod_time (mod_time_
),
1111 /* Return the include directory at D_INDEX stored in LH. Returns
1112 NULL if D_INDEX is out of bounds. */
1113 const char *include_dir (const line_header
*lh
) const;
1115 /* The file name. Note this is an observing pointer. The memory is
1116 owned by debug_line_buffer. */
1117 const char *name
{};
1119 /* The directory index (1-based). */
1120 dir_index d_index
{};
1122 unsigned int mod_time
{};
1124 unsigned int length
{};
1126 /* True if referenced by the Line Number Program. */
1129 /* The associated symbol table, if any. */
1130 struct symtab
*symtab
{};
1133 /* The line number information for a compilation unit (found in the
1134 .debug_line section) begins with a "statement program header",
1135 which contains the following information. */
1142 /* Add an entry to the include directory table. */
1143 void add_include_dir (const char *include_dir
);
1145 /* Add an entry to the file name table. */
1146 void add_file_name (const char *name
, dir_index d_index
,
1147 unsigned int mod_time
, unsigned int length
);
1149 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
1150 is out of bounds. */
1151 const char *include_dir_at (dir_index index
) const
1153 /* Convert directory index number (1-based) to vector index
1155 size_t vec_index
= to_underlying (index
) - 1;
1157 if (vec_index
>= include_dirs
.size ())
1159 return include_dirs
[vec_index
];
1162 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
1163 is out of bounds. */
1164 file_entry
*file_name_at (file_name_index index
)
1166 /* Convert file name index number (1-based) to vector index
1168 size_t vec_index
= to_underlying (index
) - 1;
1170 if (vec_index
>= file_names
.size ())
1172 return &file_names
[vec_index
];
1175 /* Const version of the above. */
1176 const file_entry
*file_name_at (unsigned int index
) const
1178 if (index
>= file_names
.size ())
1180 return &file_names
[index
];
1183 /* Offset of line number information in .debug_line section. */
1184 sect_offset sect_off
{};
1186 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1187 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1189 unsigned int total_length
{};
1190 unsigned short version
{};
1191 unsigned int header_length
{};
1192 unsigned char minimum_instruction_length
{};
1193 unsigned char maximum_ops_per_instruction
{};
1194 unsigned char default_is_stmt
{};
1196 unsigned char line_range
{};
1197 unsigned char opcode_base
{};
1199 /* standard_opcode_lengths[i] is the number of operands for the
1200 standard opcode whose value is i. This means that
1201 standard_opcode_lengths[0] is unused, and the last meaningful
1202 element is standard_opcode_lengths[opcode_base - 1]. */
1203 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1205 /* The include_directories table. Note these are observing
1206 pointers. The memory is owned by debug_line_buffer. */
1207 std::vector
<const char *> include_dirs
;
1209 /* The file_names table. */
1210 std::vector
<file_entry
> file_names
;
1212 /* The start and end of the statement program following this
1213 header. These point into dwarf2_per_objfile->line_buffer. */
1214 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1217 typedef std::unique_ptr
<line_header
> line_header_up
;
1220 file_entry::include_dir (const line_header
*lh
) const
1222 return lh
->include_dir_at (d_index
);
1225 /* When we construct a partial symbol table entry we only
1226 need this much information. */
1227 struct partial_die_info
1229 /* Offset of this DIE. */
1230 sect_offset sect_off
;
1232 /* DWARF-2 tag for this DIE. */
1233 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1235 /* Assorted flags describing the data found in this DIE. */
1236 unsigned int has_children
: 1;
1237 unsigned int is_external
: 1;
1238 unsigned int is_declaration
: 1;
1239 unsigned int has_type
: 1;
1240 unsigned int has_specification
: 1;
1241 unsigned int has_pc_info
: 1;
1242 unsigned int may_be_inlined
: 1;
1244 /* This DIE has been marked DW_AT_main_subprogram. */
1245 unsigned int main_subprogram
: 1;
1247 /* Flag set if the SCOPE field of this structure has been
1249 unsigned int scope_set
: 1;
1251 /* Flag set if the DIE has a byte_size attribute. */
1252 unsigned int has_byte_size
: 1;
1254 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1255 unsigned int has_const_value
: 1;
1257 /* Flag set if any of the DIE's children are template arguments. */
1258 unsigned int has_template_arguments
: 1;
1260 /* Flag set if fixup_partial_die has been called on this die. */
1261 unsigned int fixup_called
: 1;
1263 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1264 unsigned int is_dwz
: 1;
1266 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1267 unsigned int spec_is_dwz
: 1;
1269 /* The name of this DIE. Normally the value of DW_AT_name, but
1270 sometimes a default name for unnamed DIEs. */
1273 /* The linkage name, if present. */
1274 const char *linkage_name
;
1276 /* The scope to prepend to our children. This is generally
1277 allocated on the comp_unit_obstack, so will disappear
1278 when this compilation unit leaves the cache. */
1281 /* Some data associated with the partial DIE. The tag determines
1282 which field is live. */
1285 /* The location description associated with this DIE, if any. */
1286 struct dwarf_block
*locdesc
;
1287 /* The offset of an import, for DW_TAG_imported_unit. */
1288 sect_offset sect_off
;
1291 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1295 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1296 DW_AT_sibling, if any. */
1297 /* NOTE: This member isn't strictly necessary, read_partial_die could
1298 return DW_AT_sibling values to its caller load_partial_dies. */
1299 const gdb_byte
*sibling
;
1301 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1302 DW_AT_specification (or DW_AT_abstract_origin or
1303 DW_AT_extension). */
1304 sect_offset spec_offset
;
1306 /* Pointers to this DIE's parent, first child, and next sibling,
1308 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
1311 /* This data structure holds the information of an abbrev. */
1314 unsigned int number
; /* number identifying abbrev */
1315 enum dwarf_tag tag
; /* dwarf tag */
1316 unsigned short has_children
; /* boolean */
1317 unsigned short num_attrs
; /* number of attributes */
1318 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1319 struct abbrev_info
*next
; /* next in chain */
1324 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1325 ENUM_BITFIELD(dwarf_form
) form
: 16;
1327 /* It is valid only if FORM is DW_FORM_implicit_const. */
1328 LONGEST implicit_const
;
1331 /* Size of abbrev_table.abbrev_hash_table. */
1332 #define ABBREV_HASH_SIZE 121
1334 /* Top level data structure to contain an abbreviation table. */
1338 /* Where the abbrev table came from.
1339 This is used as a sanity check when the table is used. */
1340 sect_offset sect_off
;
1342 /* Storage for the abbrev table. */
1343 struct obstack abbrev_obstack
;
1345 /* Hash table of abbrevs.
1346 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1347 It could be statically allocated, but the previous code didn't so we
1349 struct abbrev_info
**abbrevs
;
1352 /* Attributes have a name and a value. */
1355 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1356 ENUM_BITFIELD(dwarf_form
) form
: 15;
1358 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1359 field should be in u.str (existing only for DW_STRING) but it is kept
1360 here for better struct attribute alignment. */
1361 unsigned int string_is_canonical
: 1;
1366 struct dwarf_block
*blk
;
1375 /* This data structure holds a complete die structure. */
1378 /* DWARF-2 tag for this DIE. */
1379 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1381 /* Number of attributes */
1382 unsigned char num_attrs
;
1384 /* True if we're presently building the full type name for the
1385 type derived from this DIE. */
1386 unsigned char building_fullname
: 1;
1388 /* True if this die is in process. PR 16581. */
1389 unsigned char in_process
: 1;
1392 unsigned int abbrev
;
1394 /* Offset in .debug_info or .debug_types section. */
1395 sect_offset sect_off
;
1397 /* The dies in a compilation unit form an n-ary tree. PARENT
1398 points to this die's parent; CHILD points to the first child of
1399 this node; and all the children of a given node are chained
1400 together via their SIBLING fields. */
1401 struct die_info
*child
; /* Its first child, if any. */
1402 struct die_info
*sibling
; /* Its next sibling, if any. */
1403 struct die_info
*parent
; /* Its parent, if any. */
1405 /* An array of attributes, with NUM_ATTRS elements. There may be
1406 zero, but it's not common and zero-sized arrays are not
1407 sufficiently portable C. */
1408 struct attribute attrs
[1];
1411 /* Get at parts of an attribute structure. */
1413 #define DW_STRING(attr) ((attr)->u.str)
1414 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1415 #define DW_UNSND(attr) ((attr)->u.unsnd)
1416 #define DW_BLOCK(attr) ((attr)->u.blk)
1417 #define DW_SND(attr) ((attr)->u.snd)
1418 #define DW_ADDR(attr) ((attr)->u.addr)
1419 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1421 /* Blocks are a bunch of untyped bytes. */
1426 /* Valid only if SIZE is not zero. */
1427 const gdb_byte
*data
;
1430 #ifndef ATTR_ALLOC_CHUNK
1431 #define ATTR_ALLOC_CHUNK 4
1434 /* Allocate fields for structs, unions and enums in this size. */
1435 #ifndef DW_FIELD_ALLOC_CHUNK
1436 #define DW_FIELD_ALLOC_CHUNK 4
1439 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1440 but this would require a corresponding change in unpack_field_as_long
1442 static int bits_per_byte
= 8;
1446 struct nextfield
*next
;
1454 struct nextfnfield
*next
;
1455 struct fn_field fnfield
;
1462 struct nextfnfield
*head
;
1465 struct typedef_field_list
1467 struct typedef_field field
;
1468 struct typedef_field_list
*next
;
1471 /* The routines that read and process dies for a C struct or C++ class
1472 pass lists of data member fields and lists of member function fields
1473 in an instance of a field_info structure, as defined below. */
1476 /* List of data member and baseclasses fields. */
1477 struct nextfield
*fields
, *baseclasses
;
1479 /* Number of fields (including baseclasses). */
1482 /* Number of baseclasses. */
1485 /* Set if the accesibility of one of the fields is not public. */
1486 int non_public_fields
;
1488 /* Member function fieldlist array, contains name of possibly overloaded
1489 member function, number of overloaded member functions and a pointer
1490 to the head of the member function field chain. */
1491 struct fnfieldlist
*fnfieldlists
;
1493 /* Number of entries in the fnfieldlists array. */
1496 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1497 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1498 struct typedef_field_list
*typedef_field_list
;
1499 unsigned typedef_field_list_count
;
1502 /* One item on the queue of compilation units to read in full symbols
1504 struct dwarf2_queue_item
1506 struct dwarf2_per_cu_data
*per_cu
;
1507 enum language pretend_language
;
1508 struct dwarf2_queue_item
*next
;
1511 /* The current queue. */
1512 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1514 /* Loaded secondary compilation units are kept in memory until they
1515 have not been referenced for the processing of this many
1516 compilation units. Set this to zero to disable caching. Cache
1517 sizes of up to at least twenty will improve startup time for
1518 typical inter-CU-reference binaries, at an obvious memory cost. */
1519 static int dwarf_max_cache_age
= 5;
1521 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1522 struct cmd_list_element
*c
, const char *value
)
1524 fprintf_filtered (file
, _("The upper bound on the age of cached "
1525 "DWARF compilation units is %s.\n"),
1529 /* local function prototypes */
1531 static const char *get_section_name (const struct dwarf2_section_info
*);
1533 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1535 static void dwarf2_find_base_address (struct die_info
*die
,
1536 struct dwarf2_cu
*cu
);
1538 static struct partial_symtab
*create_partial_symtab
1539 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1541 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1542 const gdb_byte
*info_ptr
,
1543 struct die_info
*type_unit_die
,
1544 int has_children
, void *data
);
1546 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1548 static void scan_partial_symbols (struct partial_die_info
*,
1549 CORE_ADDR
*, CORE_ADDR
*,
1550 int, struct dwarf2_cu
*);
1552 static void add_partial_symbol (struct partial_die_info
*,
1553 struct dwarf2_cu
*);
1555 static void add_partial_namespace (struct partial_die_info
*pdi
,
1556 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1557 int set_addrmap
, struct dwarf2_cu
*cu
);
1559 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1560 CORE_ADDR
*highpc
, int set_addrmap
,
1561 struct dwarf2_cu
*cu
);
1563 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1564 struct dwarf2_cu
*cu
);
1566 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1567 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1568 int need_pc
, struct dwarf2_cu
*cu
);
1570 static void dwarf2_read_symtab (struct partial_symtab
*,
1573 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1575 static struct abbrev_info
*abbrev_table_lookup_abbrev
1576 (const struct abbrev_table
*, unsigned int);
1578 static struct abbrev_table
*abbrev_table_read_table
1579 (struct dwarf2_section_info
*, sect_offset
);
1581 static void abbrev_table_free (struct abbrev_table
*);
1583 static void abbrev_table_free_cleanup (void *);
1585 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1586 struct dwarf2_section_info
*);
1588 static void dwarf2_free_abbrev_table (void *);
1590 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1592 static struct partial_die_info
*load_partial_dies
1593 (const struct die_reader_specs
*, const gdb_byte
*, int);
1595 static const gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1596 struct partial_die_info
*,
1597 struct abbrev_info
*,
1601 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1602 struct dwarf2_cu
*);
1604 static void fixup_partial_die (struct partial_die_info
*,
1605 struct dwarf2_cu
*);
1607 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1608 struct attribute
*, struct attr_abbrev
*,
1611 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1613 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1615 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1617 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1619 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1621 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1624 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1626 static LONGEST read_checked_initial_length_and_offset
1627 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1628 unsigned int *, unsigned int *);
1630 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1631 const struct comp_unit_head
*,
1634 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1636 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1639 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1641 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1643 static const char *read_indirect_string (bfd
*, const gdb_byte
*,
1644 const struct comp_unit_head
*,
1647 static const char *read_indirect_line_string (bfd
*, const gdb_byte
*,
1648 const struct comp_unit_head
*,
1651 static const char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1653 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1655 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1659 static const char *read_str_index (const struct die_reader_specs
*reader
,
1660 ULONGEST str_index
);
1662 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1664 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1665 struct dwarf2_cu
*);
1667 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1670 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1671 struct dwarf2_cu
*cu
);
1673 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1674 struct dwarf2_cu
*cu
);
1676 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1678 static struct die_info
*die_specification (struct die_info
*die
,
1679 struct dwarf2_cu
**);
1681 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1682 struct dwarf2_cu
*cu
);
1684 static void dwarf_decode_lines (struct line_header
*, const char *,
1685 struct dwarf2_cu
*, struct partial_symtab
*,
1686 CORE_ADDR
, int decode_mapping
);
1688 static void dwarf2_start_subfile (const char *, const char *);
1690 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1691 const char *, const char *,
1694 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1695 struct dwarf2_cu
*);
1697 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1698 struct dwarf2_cu
*, struct symbol
*);
1700 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1701 struct dwarf2_cu
*);
1703 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1706 struct obstack
*obstack
,
1707 struct dwarf2_cu
*cu
, LONGEST
*value
,
1708 const gdb_byte
**bytes
,
1709 struct dwarf2_locexpr_baton
**baton
);
1711 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1713 static int need_gnat_info (struct dwarf2_cu
*);
1715 static struct type
*die_descriptive_type (struct die_info
*,
1716 struct dwarf2_cu
*);
1718 static void set_descriptive_type (struct type
*, struct die_info
*,
1719 struct dwarf2_cu
*);
1721 static struct type
*die_containing_type (struct die_info
*,
1722 struct dwarf2_cu
*);
1724 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1725 struct dwarf2_cu
*);
1727 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1729 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1731 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1733 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1734 const char *suffix
, int physname
,
1735 struct dwarf2_cu
*cu
);
1737 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1739 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1741 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1743 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1745 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1747 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1748 struct dwarf2_cu
*, struct partial_symtab
*);
1750 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1751 values. Keep the items ordered with increasing constraints compliance. */
1754 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1755 PC_BOUNDS_NOT_PRESENT
,
1757 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1758 were present but they do not form a valid range of PC addresses. */
1761 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1764 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1768 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1769 CORE_ADDR
*, CORE_ADDR
*,
1771 struct partial_symtab
*);
1773 static void get_scope_pc_bounds (struct die_info
*,
1774 CORE_ADDR
*, CORE_ADDR
*,
1775 struct dwarf2_cu
*);
1777 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1778 CORE_ADDR
, struct dwarf2_cu
*);
1780 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1781 struct dwarf2_cu
*);
1783 static void dwarf2_attach_fields_to_type (struct field_info
*,
1784 struct type
*, struct dwarf2_cu
*);
1786 static void dwarf2_add_member_fn (struct field_info
*,
1787 struct die_info
*, struct type
*,
1788 struct dwarf2_cu
*);
1790 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1792 struct dwarf2_cu
*);
1794 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1796 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1798 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1800 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1802 static struct using_direct
**using_directives (enum language
);
1804 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1806 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1808 static struct type
*read_module_type (struct die_info
*die
,
1809 struct dwarf2_cu
*cu
);
1811 static const char *namespace_name (struct die_info
*die
,
1812 int *is_anonymous
, struct dwarf2_cu
*);
1814 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1816 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1818 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1819 struct dwarf2_cu
*);
1821 static struct die_info
*read_die_and_siblings_1
1822 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1825 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1826 const gdb_byte
*info_ptr
,
1827 const gdb_byte
**new_info_ptr
,
1828 struct die_info
*parent
);
1830 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1831 struct die_info
**, const gdb_byte
*,
1834 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1835 struct die_info
**, const gdb_byte
*,
1838 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1840 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1843 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1845 static const char *dwarf2_full_name (const char *name
,
1846 struct die_info
*die
,
1847 struct dwarf2_cu
*cu
);
1849 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1850 struct dwarf2_cu
*cu
);
1852 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1853 struct dwarf2_cu
**);
1855 static const char *dwarf_tag_name (unsigned int);
1857 static const char *dwarf_attr_name (unsigned int);
1859 static const char *dwarf_form_name (unsigned int);
1861 static const char *dwarf_bool_name (unsigned int);
1863 static const char *dwarf_type_encoding_name (unsigned int);
1865 static struct die_info
*sibling_die (struct die_info
*);
1867 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1869 static void dump_die_for_error (struct die_info
*);
1871 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1874 /*static*/ void dump_die (struct die_info
*, int max_level
);
1876 static void store_in_ref_table (struct die_info
*,
1877 struct dwarf2_cu
*);
1879 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1881 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1883 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1884 const struct attribute
*,
1885 struct dwarf2_cu
**);
1887 static struct die_info
*follow_die_ref (struct die_info
*,
1888 const struct attribute
*,
1889 struct dwarf2_cu
**);
1891 static struct die_info
*follow_die_sig (struct die_info
*,
1892 const struct attribute
*,
1893 struct dwarf2_cu
**);
1895 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1896 struct dwarf2_cu
*);
1898 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1899 const struct attribute
*,
1900 struct dwarf2_cu
*);
1902 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1904 static void read_signatured_type (struct signatured_type
*);
1906 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1907 struct die_info
*die
, struct dwarf2_cu
*cu
,
1908 struct dynamic_prop
*prop
);
1910 /* memory allocation interface */
1912 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1914 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1916 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1918 static int attr_form_is_block (const struct attribute
*);
1920 static int attr_form_is_section_offset (const struct attribute
*);
1922 static int attr_form_is_constant (const struct attribute
*);
1924 static int attr_form_is_ref (const struct attribute
*);
1926 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1927 struct dwarf2_loclist_baton
*baton
,
1928 const struct attribute
*attr
);
1930 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1932 struct dwarf2_cu
*cu
,
1935 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1936 const gdb_byte
*info_ptr
,
1937 struct abbrev_info
*abbrev
);
1939 static void free_stack_comp_unit (void *);
1941 static hashval_t
partial_die_hash (const void *item
);
1943 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1945 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1946 (sect_offset sect_off
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1948 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1949 struct dwarf2_per_cu_data
*per_cu
);
1951 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1952 struct die_info
*comp_unit_die
,
1953 enum language pretend_language
);
1955 static void free_heap_comp_unit (void *);
1957 static void free_cached_comp_units (void *);
1959 static void age_cached_comp_units (void);
1961 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1963 static struct type
*set_die_type (struct die_info
*, struct type
*,
1964 struct dwarf2_cu
*);
1966 static void create_all_comp_units (struct objfile
*);
1968 static int create_all_type_units (struct objfile
*);
1970 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1973 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1976 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1979 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1980 struct dwarf2_per_cu_data
*);
1982 static void dwarf2_mark (struct dwarf2_cu
*);
1984 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1986 static struct type
*get_die_type_at_offset (sect_offset
,
1987 struct dwarf2_per_cu_data
*);
1989 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1991 static void dwarf2_release_queue (void *dummy
);
1993 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1994 enum language pretend_language
);
1996 static void process_queue (void);
1998 /* The return type of find_file_and_directory. Note, the enclosed
1999 string pointers are only valid while this object is valid. */
2001 struct file_and_directory
2003 /* The filename. This is never NULL. */
2006 /* The compilation directory. NULL if not known. If we needed to
2007 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
2008 points directly to the DW_AT_comp_dir string attribute owned by
2009 the obstack that owns the DIE. */
2010 const char *comp_dir
;
2012 /* If we needed to build a new string for comp_dir, this is what
2013 owns the storage. */
2014 std::string comp_dir_storage
;
2017 static file_and_directory
find_file_and_directory (struct die_info
*die
,
2018 struct dwarf2_cu
*cu
);
2020 static char *file_full_name (int file
, struct line_header
*lh
,
2021 const char *comp_dir
);
2023 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
2024 enum class rcuh_kind
{ COMPILE
, TYPE
};
2026 static const gdb_byte
*read_and_check_comp_unit_head
2027 (struct comp_unit_head
*header
,
2028 struct dwarf2_section_info
*section
,
2029 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
2030 rcuh_kind section_kind
);
2032 static void init_cutu_and_read_dies
2033 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
2034 int use_existing_cu
, int keep
,
2035 die_reader_func_ftype
*die_reader_func
, void *data
);
2037 static void init_cutu_and_read_dies_simple
2038 (struct dwarf2_per_cu_data
*this_cu
,
2039 die_reader_func_ftype
*die_reader_func
, void *data
);
2041 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
2043 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
2045 static struct dwo_unit
*lookup_dwo_unit_in_dwp
2046 (struct dwp_file
*dwp_file
, const char *comp_dir
,
2047 ULONGEST signature
, int is_debug_types
);
2049 static struct dwp_file
*get_dwp_file (void);
2051 static struct dwo_unit
*lookup_dwo_comp_unit
2052 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
2054 static struct dwo_unit
*lookup_dwo_type_unit
2055 (struct signatured_type
*, const char *, const char *);
2057 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
2059 static void free_dwo_file_cleanup (void *);
2061 static void process_cu_includes (void);
2063 static void check_producer (struct dwarf2_cu
*cu
);
2065 static void free_line_header_voidp (void *arg
);
2067 /* Various complaints about symbol reading that don't abort the process. */
2070 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2072 complaint (&symfile_complaints
,
2073 _("statement list doesn't fit in .debug_line section"));
2077 dwarf2_debug_line_missing_file_complaint (void)
2079 complaint (&symfile_complaints
,
2080 _(".debug_line section has line data without a file"));
2084 dwarf2_debug_line_missing_end_sequence_complaint (void)
2086 complaint (&symfile_complaints
,
2087 _(".debug_line section has line "
2088 "program sequence without an end"));
2092 dwarf2_complex_location_expr_complaint (void)
2094 complaint (&symfile_complaints
, _("location expression too complex"));
2098 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2101 complaint (&symfile_complaints
,
2102 _("const value length mismatch for '%s', got %d, expected %d"),
2107 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2109 complaint (&symfile_complaints
,
2110 _("debug info runs off end of %s section"
2112 get_section_name (section
),
2113 get_section_file_name (section
));
2117 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2119 complaint (&symfile_complaints
,
2120 _("macro debug info contains a "
2121 "malformed macro definition:\n`%s'"),
2126 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2128 complaint (&symfile_complaints
,
2129 _("invalid attribute class or form for '%s' in '%s'"),
2133 /* Hash function for line_header_hash. */
2136 line_header_hash (const struct line_header
*ofs
)
2138 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2141 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2144 line_header_hash_voidp (const void *item
)
2146 const struct line_header
*ofs
= (const struct line_header
*) item
;
2148 return line_header_hash (ofs
);
2151 /* Equality function for line_header_hash. */
2154 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2156 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2157 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2159 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2160 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2166 /* Convert VALUE between big- and little-endian. */
2168 byte_swap (offset_type value
)
2172 result
= (value
& 0xff) << 24;
2173 result
|= (value
& 0xff00) << 8;
2174 result
|= (value
& 0xff0000) >> 8;
2175 result
|= (value
& 0xff000000) >> 24;
2179 #define MAYBE_SWAP(V) byte_swap (V)
2182 #define MAYBE_SWAP(V) static_cast<offset_type> (V)
2183 #endif /* WORDS_BIGENDIAN */
2185 /* Read the given attribute value as an address, taking the attribute's
2186 form into account. */
2189 attr_value_as_address (struct attribute
*attr
)
2193 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2195 /* Aside from a few clearly defined exceptions, attributes that
2196 contain an address must always be in DW_FORM_addr form.
2197 Unfortunately, some compilers happen to be violating this
2198 requirement by encoding addresses using other forms, such
2199 as DW_FORM_data4 for example. For those broken compilers,
2200 we try to do our best, without any guarantee of success,
2201 to interpret the address correctly. It would also be nice
2202 to generate a complaint, but that would require us to maintain
2203 a list of legitimate cases where a non-address form is allowed,
2204 as well as update callers to pass in at least the CU's DWARF
2205 version. This is more overhead than what we're willing to
2206 expand for a pretty rare case. */
2207 addr
= DW_UNSND (attr
);
2210 addr
= DW_ADDR (attr
);
2215 /* The suffix for an index file. */
2216 #define INDEX_SUFFIX ".gdb-index"
2218 /* See declaration. */
2220 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2221 const dwarf2_debug_sections
*names
)
2222 : objfile (objfile_
)
2225 names
= &dwarf2_elf_names
;
2227 bfd
*obfd
= objfile
->obfd
;
2229 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2230 locate_sections (obfd
, sec
, *names
);
2233 dwarf2_per_objfile::~dwarf2_per_objfile ()
2235 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2236 free_cached_comp_units ();
2238 if (quick_file_names_table
)
2239 htab_delete (quick_file_names_table
);
2241 if (line_header_hash
)
2242 htab_delete (line_header_hash
);
2244 /* Everything else should be on the objfile obstack. */
2247 /* See declaration. */
2250 dwarf2_per_objfile::free_cached_comp_units ()
2252 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2253 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2254 while (per_cu
!= NULL
)
2256 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2258 free_heap_comp_unit (per_cu
->cu
);
2259 *last_chain
= next_cu
;
2264 /* Try to locate the sections we need for DWARF 2 debugging
2265 information and return true if we have enough to do something.
2266 NAMES points to the dwarf2 section names, or is NULL if the standard
2267 ELF names are used. */
2270 dwarf2_has_info (struct objfile
*objfile
,
2271 const struct dwarf2_debug_sections
*names
)
2273 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
2274 objfile_data (objfile
, dwarf2_objfile_data_key
));
2275 if (!dwarf2_per_objfile
)
2277 /* Initialize per-objfile state. */
2278 struct dwarf2_per_objfile
*data
2279 = XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_per_objfile
);
2281 dwarf2_per_objfile
= new (data
) struct dwarf2_per_objfile (objfile
, names
);
2282 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
2284 return (!dwarf2_per_objfile
->info
.is_virtual
2285 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2286 && !dwarf2_per_objfile
->abbrev
.is_virtual
2287 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2290 /* Return the containing section of virtual section SECTION. */
2292 static struct dwarf2_section_info
*
2293 get_containing_section (const struct dwarf2_section_info
*section
)
2295 gdb_assert (section
->is_virtual
);
2296 return section
->s
.containing_section
;
2299 /* Return the bfd owner of SECTION. */
2302 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2304 if (section
->is_virtual
)
2306 section
= get_containing_section (section
);
2307 gdb_assert (!section
->is_virtual
);
2309 return section
->s
.section
->owner
;
2312 /* Return the bfd section of SECTION.
2313 Returns NULL if the section is not present. */
2316 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2318 if (section
->is_virtual
)
2320 section
= get_containing_section (section
);
2321 gdb_assert (!section
->is_virtual
);
2323 return section
->s
.section
;
2326 /* Return the name of SECTION. */
2329 get_section_name (const struct dwarf2_section_info
*section
)
2331 asection
*sectp
= get_section_bfd_section (section
);
2333 gdb_assert (sectp
!= NULL
);
2334 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2337 /* Return the name of the file SECTION is in. */
2340 get_section_file_name (const struct dwarf2_section_info
*section
)
2342 bfd
*abfd
= get_section_bfd_owner (section
);
2344 return bfd_get_filename (abfd
);
2347 /* Return the id of SECTION.
2348 Returns 0 if SECTION doesn't exist. */
2351 get_section_id (const struct dwarf2_section_info
*section
)
2353 asection
*sectp
= get_section_bfd_section (section
);
2360 /* Return the flags of SECTION.
2361 SECTION (or containing section if this is a virtual section) must exist. */
2364 get_section_flags (const struct dwarf2_section_info
*section
)
2366 asection
*sectp
= get_section_bfd_section (section
);
2368 gdb_assert (sectp
!= NULL
);
2369 return bfd_get_section_flags (sectp
->owner
, sectp
);
2372 /* When loading sections, we look either for uncompressed section or for
2373 compressed section names. */
2376 section_is_p (const char *section_name
,
2377 const struct dwarf2_section_names
*names
)
2379 if (names
->normal
!= NULL
2380 && strcmp (section_name
, names
->normal
) == 0)
2382 if (names
->compressed
!= NULL
2383 && strcmp (section_name
, names
->compressed
) == 0)
2388 /* See declaration. */
2391 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2392 const dwarf2_debug_sections
&names
)
2394 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2396 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2399 else if (section_is_p (sectp
->name
, &names
.info
))
2401 this->info
.s
.section
= sectp
;
2402 this->info
.size
= bfd_get_section_size (sectp
);
2404 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2406 this->abbrev
.s
.section
= sectp
;
2407 this->abbrev
.size
= bfd_get_section_size (sectp
);
2409 else if (section_is_p (sectp
->name
, &names
.line
))
2411 this->line
.s
.section
= sectp
;
2412 this->line
.size
= bfd_get_section_size (sectp
);
2414 else if (section_is_p (sectp
->name
, &names
.loc
))
2416 this->loc
.s
.section
= sectp
;
2417 this->loc
.size
= bfd_get_section_size (sectp
);
2419 else if (section_is_p (sectp
->name
, &names
.loclists
))
2421 this->loclists
.s
.section
= sectp
;
2422 this->loclists
.size
= bfd_get_section_size (sectp
);
2424 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2426 this->macinfo
.s
.section
= sectp
;
2427 this->macinfo
.size
= bfd_get_section_size (sectp
);
2429 else if (section_is_p (sectp
->name
, &names
.macro
))
2431 this->macro
.s
.section
= sectp
;
2432 this->macro
.size
= bfd_get_section_size (sectp
);
2434 else if (section_is_p (sectp
->name
, &names
.str
))
2436 this->str
.s
.section
= sectp
;
2437 this->str
.size
= bfd_get_section_size (sectp
);
2439 else if (section_is_p (sectp
->name
, &names
.line_str
))
2441 this->line_str
.s
.section
= sectp
;
2442 this->line_str
.size
= bfd_get_section_size (sectp
);
2444 else if (section_is_p (sectp
->name
, &names
.addr
))
2446 this->addr
.s
.section
= sectp
;
2447 this->addr
.size
= bfd_get_section_size (sectp
);
2449 else if (section_is_p (sectp
->name
, &names
.frame
))
2451 this->frame
.s
.section
= sectp
;
2452 this->frame
.size
= bfd_get_section_size (sectp
);
2454 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2456 this->eh_frame
.s
.section
= sectp
;
2457 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2459 else if (section_is_p (sectp
->name
, &names
.ranges
))
2461 this->ranges
.s
.section
= sectp
;
2462 this->ranges
.size
= bfd_get_section_size (sectp
);
2464 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2466 this->rnglists
.s
.section
= sectp
;
2467 this->rnglists
.size
= bfd_get_section_size (sectp
);
2469 else if (section_is_p (sectp
->name
, &names
.types
))
2471 struct dwarf2_section_info type_section
;
2473 memset (&type_section
, 0, sizeof (type_section
));
2474 type_section
.s
.section
= sectp
;
2475 type_section
.size
= bfd_get_section_size (sectp
);
2477 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2480 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2482 this->gdb_index
.s
.section
= sectp
;
2483 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2486 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2487 && bfd_section_vma (abfd
, sectp
) == 0)
2488 this->has_section_at_zero
= true;
2491 /* A helper function that decides whether a section is empty,
2495 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2497 if (section
->is_virtual
)
2498 return section
->size
== 0;
2499 return section
->s
.section
== NULL
|| section
->size
== 0;
2502 /* Read the contents of the section INFO.
2503 OBJFILE is the main object file, but not necessarily the file where
2504 the section comes from. E.g., for DWO files the bfd of INFO is the bfd
2506 If the section is compressed, uncompress it before returning. */
2509 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
2513 gdb_byte
*buf
, *retbuf
;
2517 info
->buffer
= NULL
;
2520 if (dwarf2_section_empty_p (info
))
2523 sectp
= get_section_bfd_section (info
);
2525 /* If this is a virtual section we need to read in the real one first. */
2526 if (info
->is_virtual
)
2528 struct dwarf2_section_info
*containing_section
=
2529 get_containing_section (info
);
2531 gdb_assert (sectp
!= NULL
);
2532 if ((sectp
->flags
& SEC_RELOC
) != 0)
2534 error (_("Dwarf Error: DWP format V2 with relocations is not"
2535 " supported in section %s [in module %s]"),
2536 get_section_name (info
), get_section_file_name (info
));
2538 dwarf2_read_section (objfile
, containing_section
);
2539 /* Other code should have already caught virtual sections that don't
2541 gdb_assert (info
->virtual_offset
+ info
->size
2542 <= containing_section
->size
);
2543 /* If the real section is empty or there was a problem reading the
2544 section we shouldn't get here. */
2545 gdb_assert (containing_section
->buffer
!= NULL
);
2546 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2550 /* If the section has relocations, we must read it ourselves.
2551 Otherwise we attach it to the BFD. */
2552 if ((sectp
->flags
& SEC_RELOC
) == 0)
2554 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2558 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2561 /* When debugging .o files, we may need to apply relocations; see
2562 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2563 We never compress sections in .o files, so we only need to
2564 try this when the section is not compressed. */
2565 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2568 info
->buffer
= retbuf
;
2572 abfd
= get_section_bfd_owner (info
);
2573 gdb_assert (abfd
!= NULL
);
2575 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2576 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2578 error (_("Dwarf Error: Can't read DWARF data"
2579 " in section %s [in module %s]"),
2580 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2584 /* A helper function that returns the size of a section in a safe way.
2585 If you are positive that the section has been read before using the
2586 size, then it is safe to refer to the dwarf2_section_info object's
2587 "size" field directly. In other cases, you must call this
2588 function, because for compressed sections the size field is not set
2589 correctly until the section has been read. */
2591 static bfd_size_type
2592 dwarf2_section_size (struct objfile
*objfile
,
2593 struct dwarf2_section_info
*info
)
2596 dwarf2_read_section (objfile
, info
);
2600 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2604 dwarf2_get_section_info (struct objfile
*objfile
,
2605 enum dwarf2_section_enum sect
,
2606 asection
**sectp
, const gdb_byte
**bufp
,
2607 bfd_size_type
*sizep
)
2609 struct dwarf2_per_objfile
*data
2610 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2611 dwarf2_objfile_data_key
);
2612 struct dwarf2_section_info
*info
;
2614 /* We may see an objfile without any DWARF, in which case we just
2625 case DWARF2_DEBUG_FRAME
:
2626 info
= &data
->frame
;
2628 case DWARF2_EH_FRAME
:
2629 info
= &data
->eh_frame
;
2632 gdb_assert_not_reached ("unexpected section");
2635 dwarf2_read_section (objfile
, info
);
2637 *sectp
= get_section_bfd_section (info
);
2638 *bufp
= info
->buffer
;
2639 *sizep
= info
->size
;
2642 /* A helper function to find the sections for a .dwz file. */
2645 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2647 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2649 /* Note that we only support the standard ELF names, because .dwz
2650 is ELF-only (at the time of writing). */
2651 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2653 dwz_file
->abbrev
.s
.section
= sectp
;
2654 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2656 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2658 dwz_file
->info
.s
.section
= sectp
;
2659 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2661 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2663 dwz_file
->str
.s
.section
= sectp
;
2664 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2666 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2668 dwz_file
->line
.s
.section
= sectp
;
2669 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2671 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2673 dwz_file
->macro
.s
.section
= sectp
;
2674 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2676 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2678 dwz_file
->gdb_index
.s
.section
= sectp
;
2679 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2683 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2684 there is no .gnu_debugaltlink section in the file. Error if there
2685 is such a section but the file cannot be found. */
2687 static struct dwz_file
*
2688 dwarf2_get_dwz_file (void)
2691 struct cleanup
*cleanup
;
2692 const char *filename
;
2693 struct dwz_file
*result
;
2694 bfd_size_type buildid_len_arg
;
2698 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2699 return dwarf2_per_objfile
->dwz_file
;
2701 bfd_set_error (bfd_error_no_error
);
2702 data
= bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2703 &buildid_len_arg
, &buildid
);
2706 if (bfd_get_error () == bfd_error_no_error
)
2708 error (_("could not read '.gnu_debugaltlink' section: %s"),
2709 bfd_errmsg (bfd_get_error ()));
2711 cleanup
= make_cleanup (xfree
, data
);
2712 make_cleanup (xfree
, buildid
);
2714 buildid_len
= (size_t) buildid_len_arg
;
2716 filename
= (const char *) data
;
2718 std::string abs_storage
;
2719 if (!IS_ABSOLUTE_PATH (filename
))
2721 gdb::unique_xmalloc_ptr
<char> abs
2722 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2724 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2725 filename
= abs_storage
.c_str ();
2728 /* First try the file name given in the section. If that doesn't
2729 work, try to use the build-id instead. */
2730 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2731 if (dwz_bfd
!= NULL
)
2733 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2737 if (dwz_bfd
== NULL
)
2738 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2740 if (dwz_bfd
== NULL
)
2741 error (_("could not find '.gnu_debugaltlink' file for %s"),
2742 objfile_name (dwarf2_per_objfile
->objfile
));
2744 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2746 result
->dwz_bfd
= dwz_bfd
.release ();
2748 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2750 do_cleanups (cleanup
);
2752 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2753 dwarf2_per_objfile
->dwz_file
= result
;
2757 /* DWARF quick_symbols_functions support. */
2759 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2760 unique line tables, so we maintain a separate table of all .debug_line
2761 derived entries to support the sharing.
2762 All the quick functions need is the list of file names. We discard the
2763 line_header when we're done and don't need to record it here. */
2764 struct quick_file_names
2766 /* The data used to construct the hash key. */
2767 struct stmt_list_hash hash
;
2769 /* The number of entries in file_names, real_names. */
2770 unsigned int num_file_names
;
2772 /* The file names from the line table, after being run through
2774 const char **file_names
;
2776 /* The file names from the line table after being run through
2777 gdb_realpath. These are computed lazily. */
2778 const char **real_names
;
2781 /* When using the index (and thus not using psymtabs), each CU has an
2782 object of this type. This is used to hold information needed by
2783 the various "quick" methods. */
2784 struct dwarf2_per_cu_quick_data
2786 /* The file table. This can be NULL if there was no file table
2787 or it's currently not read in.
2788 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2789 struct quick_file_names
*file_names
;
2791 /* The corresponding symbol table. This is NULL if symbols for this
2792 CU have not yet been read. */
2793 struct compunit_symtab
*compunit_symtab
;
2795 /* A temporary mark bit used when iterating over all CUs in
2796 expand_symtabs_matching. */
2797 unsigned int mark
: 1;
2799 /* True if we've tried to read the file table and found there isn't one.
2800 There will be no point in trying to read it again next time. */
2801 unsigned int no_file_data
: 1;
2804 /* Utility hash function for a stmt_list_hash. */
2807 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2811 if (stmt_list_hash
->dwo_unit
!= NULL
)
2812 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2813 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2817 /* Utility equality function for a stmt_list_hash. */
2820 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2821 const struct stmt_list_hash
*rhs
)
2823 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2825 if (lhs
->dwo_unit
!= NULL
2826 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2829 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2832 /* Hash function for a quick_file_names. */
2835 hash_file_name_entry (const void *e
)
2837 const struct quick_file_names
*file_data
2838 = (const struct quick_file_names
*) e
;
2840 return hash_stmt_list_entry (&file_data
->hash
);
2843 /* Equality function for a quick_file_names. */
2846 eq_file_name_entry (const void *a
, const void *b
)
2848 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2849 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2851 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2854 /* Delete function for a quick_file_names. */
2857 delete_file_name_entry (void *e
)
2859 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2862 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2864 xfree ((void*) file_data
->file_names
[i
]);
2865 if (file_data
->real_names
)
2866 xfree ((void*) file_data
->real_names
[i
]);
2869 /* The space for the struct itself lives on objfile_obstack,
2870 so we don't free it here. */
2873 /* Create a quick_file_names hash table. */
2876 create_quick_file_names_table (unsigned int nr_initial_entries
)
2878 return htab_create_alloc (nr_initial_entries
,
2879 hash_file_name_entry
, eq_file_name_entry
,
2880 delete_file_name_entry
, xcalloc
, xfree
);
2883 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2884 have to be created afterwards. You should call age_cached_comp_units after
2885 processing PER_CU->CU. dw2_setup must have been already called. */
2888 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2890 if (per_cu
->is_debug_types
)
2891 load_full_type_unit (per_cu
);
2893 load_full_comp_unit (per_cu
, language_minimal
);
2895 if (per_cu
->cu
== NULL
)
2896 return; /* Dummy CU. */
2898 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2901 /* Read in the symbols for PER_CU. */
2904 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2906 struct cleanup
*back_to
;
2908 /* Skip type_unit_groups, reading the type units they contain
2909 is handled elsewhere. */
2910 if (IS_TYPE_UNIT_GROUP (per_cu
))
2913 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2915 if (dwarf2_per_objfile
->using_index
2916 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2917 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2919 queue_comp_unit (per_cu
, language_minimal
);
2922 /* If we just loaded a CU from a DWO, and we're working with an index
2923 that may badly handle TUs, load all the TUs in that DWO as well.
2924 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2925 if (!per_cu
->is_debug_types
2926 && per_cu
->cu
!= NULL
2927 && per_cu
->cu
->dwo_unit
!= NULL
2928 && dwarf2_per_objfile
->index_table
!= NULL
2929 && dwarf2_per_objfile
->index_table
->version
<= 7
2930 /* DWP files aren't supported yet. */
2931 && get_dwp_file () == NULL
)
2932 queue_and_load_all_dwo_tus (per_cu
);
2937 /* Age the cache, releasing compilation units that have not
2938 been used recently. */
2939 age_cached_comp_units ();
2941 do_cleanups (back_to
);
2944 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2945 the objfile from which this CU came. Returns the resulting symbol
2948 static struct compunit_symtab
*
2949 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2951 gdb_assert (dwarf2_per_objfile
->using_index
);
2952 if (!per_cu
->v
.quick
->compunit_symtab
)
2954 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2955 scoped_restore decrementer
= increment_reading_symtab ();
2956 dw2_do_instantiate_symtab (per_cu
);
2957 process_cu_includes ();
2958 do_cleanups (back_to
);
2961 return per_cu
->v
.quick
->compunit_symtab
;
2964 /* Return the CU/TU given its index.
2966 This is intended for loops like:
2968 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2969 + dwarf2_per_objfile->n_type_units); ++i)
2971 struct dwarf2_per_cu_data *per_cu = dw2_get_cutu (i);
2977 static struct dwarf2_per_cu_data
*
2978 dw2_get_cutu (int index
)
2980 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2982 index
-= dwarf2_per_objfile
->n_comp_units
;
2983 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2984 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2987 return dwarf2_per_objfile
->all_comp_units
[index
];
2990 /* Return the CU given its index.
2991 This differs from dw2_get_cutu in that it's for when you know INDEX
2994 static struct dwarf2_per_cu_data
*
2995 dw2_get_cu (int index
)
2997 gdb_assert (index
>= 0 && index
< dwarf2_per_objfile
->n_comp_units
);
2999 return dwarf2_per_objfile
->all_comp_units
[index
];
3002 /* A helper for create_cus_from_index that handles a given list of
3006 create_cus_from_index_list (struct objfile
*objfile
,
3007 const gdb_byte
*cu_list
, offset_type n_elements
,
3008 struct dwarf2_section_info
*section
,
3014 for (i
= 0; i
< n_elements
; i
+= 2)
3016 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3018 sect_offset sect_off
3019 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3020 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3023 dwarf2_per_cu_data
*the_cu
3024 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3025 struct dwarf2_per_cu_data
);
3026 the_cu
->sect_off
= sect_off
;
3027 the_cu
->length
= length
;
3028 the_cu
->objfile
= objfile
;
3029 the_cu
->section
= section
;
3030 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3031 struct dwarf2_per_cu_quick_data
);
3032 the_cu
->is_dwz
= is_dwz
;
3033 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
3037 /* Read the CU list from the mapped index, and use it to create all
3038 the CU objects for this objfile. */
3041 create_cus_from_index (struct objfile
*objfile
,
3042 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3043 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3045 struct dwz_file
*dwz
;
3047 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
3048 dwarf2_per_objfile
->all_comp_units
=
3049 XOBNEWVEC (&objfile
->objfile_obstack
, struct dwarf2_per_cu_data
*,
3050 dwarf2_per_objfile
->n_comp_units
);
3052 create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
3053 &dwarf2_per_objfile
->info
, 0, 0);
3055 if (dwz_elements
== 0)
3058 dwz
= dwarf2_get_dwz_file ();
3059 create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
, &dwz
->info
, 1,
3060 cu_list_elements
/ 2);
3063 /* Create the signatured type hash table from the index. */
3066 create_signatured_type_table_from_index (struct objfile
*objfile
,
3067 struct dwarf2_section_info
*section
,
3068 const gdb_byte
*bytes
,
3069 offset_type elements
)
3072 htab_t sig_types_hash
;
3074 dwarf2_per_objfile
->n_type_units
3075 = dwarf2_per_objfile
->n_allocated_type_units
3077 dwarf2_per_objfile
->all_type_units
=
3078 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
3080 sig_types_hash
= allocate_signatured_type_table (objfile
);
3082 for (i
= 0; i
< elements
; i
+= 3)
3084 struct signatured_type
*sig_type
;
3087 cu_offset type_offset_in_tu
;
3089 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3090 sect_offset sect_off
3091 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3093 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3095 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3098 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3099 struct signatured_type
);
3100 sig_type
->signature
= signature
;
3101 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3102 sig_type
->per_cu
.is_debug_types
= 1;
3103 sig_type
->per_cu
.section
= section
;
3104 sig_type
->per_cu
.sect_off
= sect_off
;
3105 sig_type
->per_cu
.objfile
= objfile
;
3106 sig_type
->per_cu
.v
.quick
3107 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3108 struct dwarf2_per_cu_quick_data
);
3110 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3113 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
3116 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3119 /* Read the address map data from the mapped index, and use it to
3120 populate the objfile's psymtabs_addrmap. */
3123 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
3125 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3126 const gdb_byte
*iter
, *end
;
3127 struct addrmap
*mutable_map
;
3130 auto_obstack temp_obstack
;
3132 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3134 iter
= index
->address_table
;
3135 end
= iter
+ index
->address_table_size
;
3137 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3141 ULONGEST hi
, lo
, cu_index
;
3142 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3144 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3146 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3151 complaint (&symfile_complaints
,
3152 _(".gdb_index address table has invalid range (%s - %s)"),
3153 hex_string (lo
), hex_string (hi
));
3157 if (cu_index
>= dwarf2_per_objfile
->n_comp_units
)
3159 complaint (&symfile_complaints
,
3160 _(".gdb_index address table has invalid CU number %u"),
3161 (unsigned) cu_index
);
3165 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3166 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3167 addrmap_set_empty (mutable_map
, lo
, hi
- 1, dw2_get_cutu (cu_index
));
3170 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3171 &objfile
->objfile_obstack
);
3174 /* The hash function for strings in the mapped index. This is the same as
3175 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
3176 implementation. This is necessary because the hash function is tied to the
3177 format of the mapped index file. The hash values do not have to match with
3180 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
3183 mapped_index_string_hash (int index_version
, const void *p
)
3185 const unsigned char *str
= (const unsigned char *) p
;
3189 while ((c
= *str
++) != 0)
3191 if (index_version
>= 5)
3193 r
= r
* 67 + c
- 113;
3199 /* Find a slot in the mapped index INDEX for the object named NAME.
3200 If NAME is found, set *VEC_OUT to point to the CU vector in the
3201 constant pool and return 1. If NAME cannot be found, return 0. */
3204 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3205 offset_type
**vec_out
)
3207 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3209 offset_type slot
, step
;
3210 int (*cmp
) (const char *, const char *);
3212 if (current_language
->la_language
== language_cplus
3213 || current_language
->la_language
== language_fortran
3214 || current_language
->la_language
== language_d
)
3216 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3219 if (strchr (name
, '(') != NULL
)
3221 char *without_params
= cp_remove_params (name
);
3223 if (without_params
!= NULL
)
3225 make_cleanup (xfree
, without_params
);
3226 name
= without_params
;
3231 /* Index version 4 did not support case insensitive searches. But the
3232 indices for case insensitive languages are built in lowercase, therefore
3233 simulate our NAME being searched is also lowercased. */
3234 hash
= mapped_index_string_hash ((index
->version
== 4
3235 && case_sensitivity
== case_sensitive_off
3236 ? 5 : index
->version
),
3239 slot
= hash
& (index
->symbol_table_slots
- 1);
3240 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
3241 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3245 /* Convert a slot number to an offset into the table. */
3246 offset_type i
= 2 * slot
;
3248 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
3250 do_cleanups (back_to
);
3254 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
3255 if (!cmp (name
, str
))
3257 *vec_out
= (offset_type
*) (index
->constant_pool
3258 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
3259 do_cleanups (back_to
);
3263 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
3267 /* A helper function that reads the .gdb_index from SECTION and fills
3268 in MAP. FILENAME is the name of the file containing the section;
3269 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3270 ok to use deprecated sections.
3272 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3273 out parameters that are filled in with information about the CU and
3274 TU lists in the section.
3276 Returns 1 if all went well, 0 otherwise. */
3279 read_index_from_section (struct objfile
*objfile
,
3280 const char *filename
,
3282 struct dwarf2_section_info
*section
,
3283 struct mapped_index
*map
,
3284 const gdb_byte
**cu_list
,
3285 offset_type
*cu_list_elements
,
3286 const gdb_byte
**types_list
,
3287 offset_type
*types_list_elements
)
3289 const gdb_byte
*addr
;
3290 offset_type version
;
3291 offset_type
*metadata
;
3294 if (dwarf2_section_empty_p (section
))
3297 /* Older elfutils strip versions could keep the section in the main
3298 executable while splitting it for the separate debug info file. */
3299 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3302 dwarf2_read_section (objfile
, section
);
3304 addr
= section
->buffer
;
3305 /* Version check. */
3306 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3307 /* Versions earlier than 3 emitted every copy of a psymbol. This
3308 causes the index to behave very poorly for certain requests. Version 3
3309 contained incomplete addrmap. So, it seems better to just ignore such
3313 static int warning_printed
= 0;
3314 if (!warning_printed
)
3316 warning (_("Skipping obsolete .gdb_index section in %s."),
3318 warning_printed
= 1;
3322 /* Index version 4 uses a different hash function than index version
3325 Versions earlier than 6 did not emit psymbols for inlined
3326 functions. Using these files will cause GDB not to be able to
3327 set breakpoints on inlined functions by name, so we ignore these
3328 indices unless the user has done
3329 "set use-deprecated-index-sections on". */
3330 if (version
< 6 && !deprecated_ok
)
3332 static int warning_printed
= 0;
3333 if (!warning_printed
)
3336 Skipping deprecated .gdb_index section in %s.\n\
3337 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3338 to use the section anyway."),
3340 warning_printed
= 1;
3344 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3345 of the TU (for symbols coming from TUs),
3346 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3347 Plus gold-generated indices can have duplicate entries for global symbols,
3348 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3349 These are just performance bugs, and we can't distinguish gdb-generated
3350 indices from gold-generated ones, so issue no warning here. */
3352 /* Indexes with higher version than the one supported by GDB may be no
3353 longer backward compatible. */
3357 map
->version
= version
;
3358 map
->total_size
= section
->size
;
3360 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3363 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3364 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3368 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3369 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3370 - MAYBE_SWAP (metadata
[i
]))
3374 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3375 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
3376 - MAYBE_SWAP (metadata
[i
]));
3379 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
3380 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
3381 - MAYBE_SWAP (metadata
[i
]))
3382 / (2 * sizeof (offset_type
)));
3385 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3391 /* Read the index file. If everything went ok, initialize the "quick"
3392 elements of all the CUs and return 1. Otherwise, return 0. */
3395 dwarf2_read_index (struct objfile
*objfile
)
3397 struct mapped_index local_map
, *map
;
3398 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3399 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3400 struct dwz_file
*dwz
;
3402 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3403 use_deprecated_index_sections
,
3404 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3405 &cu_list
, &cu_list_elements
,
3406 &types_list
, &types_list_elements
))
3409 /* Don't use the index if it's empty. */
3410 if (local_map
.symbol_table_slots
== 0)
3413 /* If there is a .dwz file, read it so we can get its CU list as
3415 dwz
= dwarf2_get_dwz_file ();
3418 struct mapped_index dwz_map
;
3419 const gdb_byte
*dwz_types_ignore
;
3420 offset_type dwz_types_elements_ignore
;
3422 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3424 &dwz
->gdb_index
, &dwz_map
,
3425 &dwz_list
, &dwz_list_elements
,
3427 &dwz_types_elements_ignore
))
3429 warning (_("could not read '.gdb_index' section from %s; skipping"),
3430 bfd_get_filename (dwz
->dwz_bfd
));
3435 create_cus_from_index (objfile
, cu_list
, cu_list_elements
, dwz_list
,
3438 if (types_list_elements
)
3440 struct dwarf2_section_info
*section
;
3442 /* We can only handle a single .debug_types when we have an
3444 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3447 section
= VEC_index (dwarf2_section_info_def
,
3448 dwarf2_per_objfile
->types
, 0);
3450 create_signatured_type_table_from_index (objfile
, section
, types_list
,
3451 types_list_elements
);
3454 create_addrmap_from_index (objfile
, &local_map
);
3456 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3459 dwarf2_per_objfile
->index_table
= map
;
3460 dwarf2_per_objfile
->using_index
= 1;
3461 dwarf2_per_objfile
->quick_file_names_table
=
3462 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3467 /* A helper for the "quick" functions which sets the global
3468 dwarf2_per_objfile according to OBJFILE. */
3471 dw2_setup (struct objfile
*objfile
)
3473 dwarf2_per_objfile
= ((struct dwarf2_per_objfile
*)
3474 objfile_data (objfile
, dwarf2_objfile_data_key
));
3475 gdb_assert (dwarf2_per_objfile
);
3478 /* die_reader_func for dw2_get_file_names. */
3481 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3482 const gdb_byte
*info_ptr
,
3483 struct die_info
*comp_unit_die
,
3487 struct dwarf2_cu
*cu
= reader
->cu
;
3488 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3489 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3490 struct dwarf2_per_cu_data
*lh_cu
;
3491 struct attribute
*attr
;
3494 struct quick_file_names
*qfn
;
3496 gdb_assert (! this_cu
->is_debug_types
);
3498 /* Our callers never want to match partial units -- instead they
3499 will match the enclosing full CU. */
3500 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3502 this_cu
->v
.quick
->no_file_data
= 1;
3510 sect_offset line_offset
{};
3512 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3515 struct quick_file_names find_entry
;
3517 line_offset
= (sect_offset
) DW_UNSND (attr
);
3519 /* We may have already read in this line header (TU line header sharing).
3520 If we have we're done. */
3521 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3522 find_entry
.hash
.line_sect_off
= line_offset
;
3523 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3524 &find_entry
, INSERT
);
3527 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3531 lh
= dwarf_decode_line_header (line_offset
, cu
);
3535 lh_cu
->v
.quick
->no_file_data
= 1;
3539 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3540 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3541 qfn
->hash
.line_sect_off
= line_offset
;
3542 gdb_assert (slot
!= NULL
);
3545 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3547 qfn
->num_file_names
= lh
->file_names
.size ();
3549 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3550 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3551 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3552 qfn
->real_names
= NULL
;
3554 lh_cu
->v
.quick
->file_names
= qfn
;
3557 /* A helper for the "quick" functions which attempts to read the line
3558 table for THIS_CU. */
3560 static struct quick_file_names
*
3561 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3563 /* This should never be called for TUs. */
3564 gdb_assert (! this_cu
->is_debug_types
);
3565 /* Nor type unit groups. */
3566 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3568 if (this_cu
->v
.quick
->file_names
!= NULL
)
3569 return this_cu
->v
.quick
->file_names
;
3570 /* If we know there is no line data, no point in looking again. */
3571 if (this_cu
->v
.quick
->no_file_data
)
3574 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3576 if (this_cu
->v
.quick
->no_file_data
)
3578 return this_cu
->v
.quick
->file_names
;
3581 /* A helper for the "quick" functions which computes and caches the
3582 real path for a given file name from the line table. */
3585 dw2_get_real_path (struct objfile
*objfile
,
3586 struct quick_file_names
*qfn
, int index
)
3588 if (qfn
->real_names
== NULL
)
3589 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3590 qfn
->num_file_names
, const char *);
3592 if (qfn
->real_names
[index
] == NULL
)
3593 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3595 return qfn
->real_names
[index
];
3598 static struct symtab
*
3599 dw2_find_last_source_symtab (struct objfile
*objfile
)
3601 struct compunit_symtab
*cust
;
3604 dw2_setup (objfile
);
3605 index
= dwarf2_per_objfile
->n_comp_units
- 1;
3606 cust
= dw2_instantiate_symtab (dw2_get_cutu (index
));
3609 return compunit_primary_filetab (cust
);
3612 /* Traversal function for dw2_forget_cached_source_info. */
3615 dw2_free_cached_file_names (void **slot
, void *info
)
3617 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3619 if (file_data
->real_names
)
3623 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3625 xfree ((void*) file_data
->real_names
[i
]);
3626 file_data
->real_names
[i
] = NULL
;
3634 dw2_forget_cached_source_info (struct objfile
*objfile
)
3636 dw2_setup (objfile
);
3638 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3639 dw2_free_cached_file_names
, NULL
);
3642 /* Helper function for dw2_map_symtabs_matching_filename that expands
3643 the symtabs and calls the iterator. */
3646 dw2_map_expand_apply (struct objfile
*objfile
,
3647 struct dwarf2_per_cu_data
*per_cu
,
3648 const char *name
, const char *real_path
,
3649 gdb::function_view
<bool (symtab
*)> callback
)
3651 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3653 /* Don't visit already-expanded CUs. */
3654 if (per_cu
->v
.quick
->compunit_symtab
)
3657 /* This may expand more than one symtab, and we want to iterate over
3659 dw2_instantiate_symtab (per_cu
);
3661 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3662 last_made
, callback
);
3665 /* Implementation of the map_symtabs_matching_filename method. */
3668 dw2_map_symtabs_matching_filename
3669 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3670 gdb::function_view
<bool (symtab
*)> callback
)
3673 const char *name_basename
= lbasename (name
);
3675 dw2_setup (objfile
);
3677 /* The rule is CUs specify all the files, including those used by
3678 any TU, so there's no need to scan TUs here. */
3680 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3683 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3684 struct quick_file_names
*file_data
;
3686 /* We only need to look at symtabs not already expanded. */
3687 if (per_cu
->v
.quick
->compunit_symtab
)
3690 file_data
= dw2_get_file_names (per_cu
);
3691 if (file_data
== NULL
)
3694 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3696 const char *this_name
= file_data
->file_names
[j
];
3697 const char *this_real_name
;
3699 if (compare_filenames_for_search (this_name
, name
))
3701 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3707 /* Before we invoke realpath, which can get expensive when many
3708 files are involved, do a quick comparison of the basenames. */
3709 if (! basenames_may_differ
3710 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3713 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3714 if (compare_filenames_for_search (this_real_name
, name
))
3716 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3722 if (real_path
!= NULL
)
3724 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3725 gdb_assert (IS_ABSOLUTE_PATH (name
));
3726 if (this_real_name
!= NULL
3727 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3729 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3741 /* Struct used to manage iterating over all CUs looking for a symbol. */
3743 struct dw2_symtab_iterator
3745 /* The internalized form of .gdb_index. */
3746 struct mapped_index
*index
;
3747 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3748 int want_specific_block
;
3749 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3750 Unused if !WANT_SPECIFIC_BLOCK. */
3752 /* The kind of symbol we're looking for. */
3754 /* The list of CUs from the index entry of the symbol,
3755 or NULL if not found. */
3757 /* The next element in VEC to look at. */
3759 /* The number of elements in VEC, or zero if there is no match. */
3761 /* Have we seen a global version of the symbol?
3762 If so we can ignore all further global instances.
3763 This is to work around gold/15646, inefficient gold-generated
3768 /* Initialize the index symtab iterator ITER.
3769 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3770 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3773 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3774 struct mapped_index
*index
,
3775 int want_specific_block
,
3780 iter
->index
= index
;
3781 iter
->want_specific_block
= want_specific_block
;
3782 iter
->block_index
= block_index
;
3783 iter
->domain
= domain
;
3785 iter
->global_seen
= 0;
3787 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3788 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3796 /* Return the next matching CU or NULL if there are no more. */
3798 static struct dwarf2_per_cu_data
*
3799 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3801 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3803 offset_type cu_index_and_attrs
=
3804 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3805 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3806 struct dwarf2_per_cu_data
*per_cu
;
3807 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3808 /* This value is only valid for index versions >= 7. */
3809 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3810 gdb_index_symbol_kind symbol_kind
=
3811 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3812 /* Only check the symbol attributes if they're present.
3813 Indices prior to version 7 don't record them,
3814 and indices >= 7 may elide them for certain symbols
3815 (gold does this). */
3817 (iter
->index
->version
>= 7
3818 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3820 /* Don't crash on bad data. */
3821 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3822 + dwarf2_per_objfile
->n_type_units
))
3824 complaint (&symfile_complaints
,
3825 _(".gdb_index entry has bad CU index"
3827 objfile_name (dwarf2_per_objfile
->objfile
));
3831 per_cu
= dw2_get_cutu (cu_index
);
3833 /* Skip if already read in. */
3834 if (per_cu
->v
.quick
->compunit_symtab
)
3837 /* Check static vs global. */
3840 if (iter
->want_specific_block
3841 && want_static
!= is_static
)
3843 /* Work around gold/15646. */
3844 if (!is_static
&& iter
->global_seen
)
3847 iter
->global_seen
= 1;
3850 /* Only check the symbol's kind if it has one. */
3853 switch (iter
->domain
)
3856 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3857 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3858 /* Some types are also in VAR_DOMAIN. */
3859 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3863 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3867 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3882 static struct compunit_symtab
*
3883 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3884 const char *name
, domain_enum domain
)
3886 struct compunit_symtab
*stab_best
= NULL
;
3887 struct mapped_index
*index
;
3889 dw2_setup (objfile
);
3891 index
= dwarf2_per_objfile
->index_table
;
3893 /* index is NULL if OBJF_READNOW. */
3896 struct dw2_symtab_iterator iter
;
3897 struct dwarf2_per_cu_data
*per_cu
;
3899 dw2_symtab_iter_init (&iter
, index
, 1, block_index
, domain
, name
);
3901 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3903 struct symbol
*sym
, *with_opaque
= NULL
;
3904 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
3905 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3906 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3908 sym
= block_find_symbol (block
, name
, domain
,
3909 block_find_non_opaque_type_preferred
,
3912 /* Some caution must be observed with overloaded functions
3913 and methods, since the index will not contain any overload
3914 information (but NAME might contain it). */
3917 && SYMBOL_MATCHES_SEARCH_NAME (sym
, name
))
3919 if (with_opaque
!= NULL
3920 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, name
))
3923 /* Keep looking through other CUs. */
3931 dw2_print_stats (struct objfile
*objfile
)
3933 int i
, total
, count
;
3935 dw2_setup (objfile
);
3936 total
= dwarf2_per_objfile
->n_comp_units
+ dwarf2_per_objfile
->n_type_units
;
3938 for (i
= 0; i
< total
; ++i
)
3940 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
3942 if (!per_cu
->v
.quick
->compunit_symtab
)
3945 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3946 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3949 /* This dumps minimal information about the index.
3950 It is called via "mt print objfiles".
3951 One use is to verify .gdb_index has been loaded by the
3952 gdb.dwarf2/gdb-index.exp testcase. */
3955 dw2_dump (struct objfile
*objfile
)
3957 dw2_setup (objfile
);
3958 gdb_assert (dwarf2_per_objfile
->using_index
);
3959 printf_filtered (".gdb_index:");
3960 if (dwarf2_per_objfile
->index_table
!= NULL
)
3962 printf_filtered (" version %d\n",
3963 dwarf2_per_objfile
->index_table
->version
);
3966 printf_filtered (" faked for \"readnow\"\n");
3967 printf_filtered ("\n");
3971 dw2_relocate (struct objfile
*objfile
,
3972 const struct section_offsets
*new_offsets
,
3973 const struct section_offsets
*delta
)
3975 /* There's nothing to relocate here. */
3979 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3980 const char *func_name
)
3982 struct mapped_index
*index
;
3984 dw2_setup (objfile
);
3986 index
= dwarf2_per_objfile
->index_table
;
3988 /* index is NULL if OBJF_READNOW. */
3991 struct dw2_symtab_iterator iter
;
3992 struct dwarf2_per_cu_data
*per_cu
;
3994 /* Note: It doesn't matter what we pass for block_index here. */
3995 dw2_symtab_iter_init (&iter
, index
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
3998 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3999 dw2_instantiate_symtab (per_cu
);
4004 dw2_expand_all_symtabs (struct objfile
*objfile
)
4008 dw2_setup (objfile
);
4010 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4011 + dwarf2_per_objfile
->n_type_units
); ++i
)
4013 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4015 dw2_instantiate_symtab (per_cu
);
4020 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4021 const char *fullname
)
4025 dw2_setup (objfile
);
4027 /* We don't need to consider type units here.
4028 This is only called for examining code, e.g. expand_line_sal.
4029 There can be an order of magnitude (or more) more type units
4030 than comp units, and we avoid them if we can. */
4032 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4035 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4036 struct quick_file_names
*file_data
;
4038 /* We only need to look at symtabs not already expanded. */
4039 if (per_cu
->v
.quick
->compunit_symtab
)
4042 file_data
= dw2_get_file_names (per_cu
);
4043 if (file_data
== NULL
)
4046 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4048 const char *this_fullname
= file_data
->file_names
[j
];
4050 if (filename_cmp (this_fullname
, fullname
) == 0)
4052 dw2_instantiate_symtab (per_cu
);
4060 dw2_map_matching_symbols (struct objfile
*objfile
,
4061 const char * name
, domain_enum domain
,
4063 int (*callback
) (struct block
*,
4064 struct symbol
*, void *),
4065 void *data
, symbol_compare_ftype
*match
,
4066 symbol_compare_ftype
*ordered_compare
)
4068 /* Currently unimplemented; used for Ada. The function can be called if the
4069 current language is Ada for a non-Ada objfile using GNU index. As Ada
4070 does not look for non-Ada symbols this function should just return. */
4074 dw2_expand_symtabs_matching
4075 (struct objfile
*objfile
,
4076 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4077 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4078 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4079 enum search_domain kind
)
4083 struct mapped_index
*index
;
4085 dw2_setup (objfile
);
4087 /* index_table is NULL if OBJF_READNOW. */
4088 if (!dwarf2_per_objfile
->index_table
)
4090 index
= dwarf2_per_objfile
->index_table
;
4092 if (file_matcher
!= NULL
)
4094 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4096 NULL
, xcalloc
, xfree
));
4097 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4099 NULL
, xcalloc
, xfree
));
4101 /* The rule is CUs specify all the files, including those used by
4102 any TU, so there's no need to scan TUs here. */
4104 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4107 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4108 struct quick_file_names
*file_data
;
4113 per_cu
->v
.quick
->mark
= 0;
4115 /* We only need to look at symtabs not already expanded. */
4116 if (per_cu
->v
.quick
->compunit_symtab
)
4119 file_data
= dw2_get_file_names (per_cu
);
4120 if (file_data
== NULL
)
4123 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4125 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4127 per_cu
->v
.quick
->mark
= 1;
4131 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
4133 const char *this_real_name
;
4135 if (file_matcher (file_data
->file_names
[j
], false))
4137 per_cu
->v
.quick
->mark
= 1;
4141 /* Before we invoke realpath, which can get expensive when many
4142 files are involved, do a quick comparison of the basenames. */
4143 if (!basenames_may_differ
4144 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4148 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
4149 if (file_matcher (this_real_name
, false))
4151 per_cu
->v
.quick
->mark
= 1;
4156 slot
= htab_find_slot (per_cu
->v
.quick
->mark
4157 ? visited_found
.get ()
4158 : visited_not_found
.get (),
4164 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
4166 offset_type idx
= 2 * iter
;
4168 offset_type
*vec
, vec_len
, vec_idx
;
4169 int global_seen
= 0;
4173 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
4176 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
4178 if (!symbol_matcher (name
))
4181 /* The name was matched, now expand corresponding CUs that were
4183 vec
= (offset_type
*) (index
->constant_pool
4184 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
4185 vec_len
= MAYBE_SWAP (vec
[0]);
4186 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4188 struct dwarf2_per_cu_data
*per_cu
;
4189 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4190 /* This value is only valid for index versions >= 7. */
4191 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4192 gdb_index_symbol_kind symbol_kind
=
4193 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4194 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4195 /* Only check the symbol attributes if they're present.
4196 Indices prior to version 7 don't record them,
4197 and indices >= 7 may elide them for certain symbols
4198 (gold does this). */
4200 (index
->version
>= 7
4201 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4203 /* Work around gold/15646. */
4206 if (!is_static
&& global_seen
)
4212 /* Only check the symbol's kind if it has one. */
4217 case VARIABLES_DOMAIN
:
4218 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4221 case FUNCTIONS_DOMAIN
:
4222 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4226 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4234 /* Don't crash on bad data. */
4235 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
4236 + dwarf2_per_objfile
->n_type_units
))
4238 complaint (&symfile_complaints
,
4239 _(".gdb_index entry has bad CU index"
4240 " [in module %s]"), objfile_name (objfile
));
4244 per_cu
= dw2_get_cutu (cu_index
);
4245 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4247 int symtab_was_null
=
4248 (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4250 dw2_instantiate_symtab (per_cu
);
4252 if (expansion_notify
!= NULL
4254 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
4256 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
4263 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4266 static struct compunit_symtab
*
4267 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4272 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4273 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4276 if (cust
->includes
== NULL
)
4279 for (i
= 0; cust
->includes
[i
]; ++i
)
4281 struct compunit_symtab
*s
= cust
->includes
[i
];
4283 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4291 static struct compunit_symtab
*
4292 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4293 struct bound_minimal_symbol msymbol
,
4295 struct obj_section
*section
,
4298 struct dwarf2_per_cu_data
*data
;
4299 struct compunit_symtab
*result
;
4301 dw2_setup (objfile
);
4303 if (!objfile
->psymtabs_addrmap
)
4306 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
4311 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
4312 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4313 paddress (get_objfile_arch (objfile
), pc
));
4316 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
4318 gdb_assert (result
!= NULL
);
4323 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4324 void *data
, int need_fullname
)
4326 dw2_setup (objfile
);
4328 if (!dwarf2_per_objfile
->filenames_cache
)
4330 dwarf2_per_objfile
->filenames_cache
.emplace ();
4332 htab_up
visited (htab_create_alloc (10,
4333 htab_hash_pointer
, htab_eq_pointer
,
4334 NULL
, xcalloc
, xfree
));
4336 /* The rule is CUs specify all the files, including those used
4337 by any TU, so there's no need to scan TUs here. We can
4338 ignore file names coming from already-expanded CUs. */
4340 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4342 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4344 if (per_cu
->v
.quick
->compunit_symtab
)
4346 void **slot
= htab_find_slot (visited
.get (),
4347 per_cu
->v
.quick
->file_names
,
4350 *slot
= per_cu
->v
.quick
->file_names
;
4354 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
4357 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
4358 struct quick_file_names
*file_data
;
4361 /* We only need to look at symtabs not already expanded. */
4362 if (per_cu
->v
.quick
->compunit_symtab
)
4365 file_data
= dw2_get_file_names (per_cu
);
4366 if (file_data
== NULL
)
4369 slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4372 /* Already visited. */
4377 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4379 const char *filename
= file_data
->file_names
[j
];
4380 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
4385 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
4387 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4390 this_real_name
= gdb_realpath (filename
);
4391 (*fun
) (filename
, this_real_name
.get (), data
);
4396 dw2_has_symbols (struct objfile
*objfile
)
4401 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4404 dw2_find_last_source_symtab
,
4405 dw2_forget_cached_source_info
,
4406 dw2_map_symtabs_matching_filename
,
4411 dw2_expand_symtabs_for_function
,
4412 dw2_expand_all_symtabs
,
4413 dw2_expand_symtabs_with_fullname
,
4414 dw2_map_matching_symbols
,
4415 dw2_expand_symtabs_matching
,
4416 dw2_find_pc_sect_compunit_symtab
,
4417 dw2_map_symbol_filenames
4420 /* Initialize for reading DWARF for this objfile. Return 0 if this
4421 file will use psymtabs, or 1 if using the GNU index. */
4424 dwarf2_initialize_objfile (struct objfile
*objfile
)
4426 /* If we're about to read full symbols, don't bother with the
4427 indices. In this case we also don't care if some other debug
4428 format is making psymtabs, because they are all about to be
4430 if ((objfile
->flags
& OBJF_READNOW
))
4434 dwarf2_per_objfile
->using_index
= 1;
4435 create_all_comp_units (objfile
);
4436 create_all_type_units (objfile
);
4437 dwarf2_per_objfile
->quick_file_names_table
=
4438 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
4440 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
4441 + dwarf2_per_objfile
->n_type_units
); ++i
)
4443 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
4445 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4446 struct dwarf2_per_cu_quick_data
);
4449 /* Return 1 so that gdb sees the "quick" functions. However,
4450 these functions will be no-ops because we will have expanded
4455 if (dwarf2_read_index (objfile
))
4463 /* Build a partial symbol table. */
4466 dwarf2_build_psymtabs (struct objfile
*objfile
)
4469 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
4471 init_psymbol_list (objfile
, 1024);
4476 /* This isn't really ideal: all the data we allocate on the
4477 objfile's obstack is still uselessly kept around. However,
4478 freeing it seems unsafe. */
4479 psymtab_discarder
psymtabs (objfile
);
4480 dwarf2_build_psymtabs_hard (objfile
);
4483 CATCH (except
, RETURN_MASK_ERROR
)
4485 exception_print (gdb_stderr
, except
);
4490 /* Return the total length of the CU described by HEADER. */
4493 get_cu_length (const struct comp_unit_head
*header
)
4495 return header
->initial_length_size
+ header
->length
;
4498 /* Return TRUE if SECT_OFF is within CU_HEADER. */
4501 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
4503 sect_offset bottom
= cu_header
->sect_off
;
4504 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
4506 return sect_off
>= bottom
&& sect_off
< top
;
4509 /* Find the base address of the compilation unit for range lists and
4510 location lists. It will normally be specified by DW_AT_low_pc.
4511 In DWARF-3 draft 4, the base address could be overridden by
4512 DW_AT_entry_pc. It's been removed, but GCC still uses this for
4513 compilation units with discontinuous ranges. */
4516 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
4518 struct attribute
*attr
;
4521 cu
->base_address
= 0;
4523 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
4526 cu
->base_address
= attr_value_as_address (attr
);
4531 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4534 cu
->base_address
= attr_value_as_address (attr
);
4540 /* Read in the comp unit header information from the debug_info at info_ptr.
4541 Use rcuh_kind::COMPILE as the default type if not known by the caller.
4542 NOTE: This leaves members offset, first_die_offset to be filled in
4545 static const gdb_byte
*
4546 read_comp_unit_head (struct comp_unit_head
*cu_header
,
4547 const gdb_byte
*info_ptr
,
4548 struct dwarf2_section_info
*section
,
4549 rcuh_kind section_kind
)
4552 unsigned int bytes_read
;
4553 const char *filename
= get_section_file_name (section
);
4554 bfd
*abfd
= get_section_bfd_owner (section
);
4556 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
4557 cu_header
->initial_length_size
= bytes_read
;
4558 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
4559 info_ptr
+= bytes_read
;
4560 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
4562 if (cu_header
->version
< 5)
4563 switch (section_kind
)
4565 case rcuh_kind::COMPILE
:
4566 cu_header
->unit_type
= DW_UT_compile
;
4568 case rcuh_kind::TYPE
:
4569 cu_header
->unit_type
= DW_UT_type
;
4572 internal_error (__FILE__
, __LINE__
,
4573 _("read_comp_unit_head: invalid section_kind"));
4577 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
4578 (read_1_byte (abfd
, info_ptr
));
4580 switch (cu_header
->unit_type
)
4583 if (section_kind
!= rcuh_kind::COMPILE
)
4584 error (_("Dwarf Error: wrong unit_type in compilation unit header "
4585 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
4589 section_kind
= rcuh_kind::TYPE
;
4592 error (_("Dwarf Error: wrong unit_type in compilation unit header "
4593 "(is %d, should be %d or %d) [in module %s]"),
4594 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
4597 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4600 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
4603 info_ptr
+= bytes_read
;
4604 if (cu_header
->version
< 5)
4606 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
4609 signed_addr
= bfd_get_sign_extend_vma (abfd
);
4610 if (signed_addr
< 0)
4611 internal_error (__FILE__
, __LINE__
,
4612 _("read_comp_unit_head: dwarf from non elf file"));
4613 cu_header
->signed_addr_p
= signed_addr
;
4615 if (section_kind
== rcuh_kind::TYPE
)
4617 LONGEST type_offset
;
4619 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
4622 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
4623 info_ptr
+= bytes_read
;
4624 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
4625 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
4626 error (_("Dwarf Error: Too big type_offset in compilation unit "
4627 "header (is %s) [in module %s]"), plongest (type_offset
),
4634 /* Helper function that returns the proper abbrev section for
4637 static struct dwarf2_section_info
*
4638 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
4640 struct dwarf2_section_info
*abbrev
;
4642 if (this_cu
->is_dwz
)
4643 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
4645 abbrev
= &dwarf2_per_objfile
->abbrev
;
4650 /* Subroutine of read_and_check_comp_unit_head and
4651 read_and_check_type_unit_head to simplify them.
4652 Perform various error checking on the header. */
4655 error_check_comp_unit_head (struct comp_unit_head
*header
,
4656 struct dwarf2_section_info
*section
,
4657 struct dwarf2_section_info
*abbrev_section
)
4659 const char *filename
= get_section_file_name (section
);
4661 if (header
->version
< 2 || header
->version
> 5)
4662 error (_("Dwarf Error: wrong version in compilation unit header "
4663 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
4666 if (to_underlying (header
->abbrev_sect_off
)
4667 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
4668 error (_("Dwarf Error: bad offset (0x%x) in compilation unit header "
4669 "(offset 0x%x + 6) [in module %s]"),
4670 to_underlying (header
->abbrev_sect_off
),
4671 to_underlying (header
->sect_off
),
4674 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
4675 avoid potential 32-bit overflow. */
4676 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
4678 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
4679 "(offset 0x%x + 0) [in module %s]"),
4680 header
->length
, to_underlying (header
->sect_off
),
4684 /* Read in a CU/TU header and perform some basic error checking.
4685 The contents of the header are stored in HEADER.
4686 The result is a pointer to the start of the first DIE. */
4688 static const gdb_byte
*
4689 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
4690 struct dwarf2_section_info
*section
,
4691 struct dwarf2_section_info
*abbrev_section
,
4692 const gdb_byte
*info_ptr
,
4693 rcuh_kind section_kind
)
4695 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
4696 bfd
*abfd
= get_section_bfd_owner (section
);
4698 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
4700 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
4702 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
4704 error_check_comp_unit_head (header
, section
, abbrev_section
);
4709 /* Fetch the abbreviation table offset from a comp or type unit header. */
4712 read_abbrev_offset (struct dwarf2_section_info
*section
,
4713 sect_offset sect_off
)
4715 bfd
*abfd
= get_section_bfd_owner (section
);
4716 const gdb_byte
*info_ptr
;
4717 unsigned int initial_length_size
, offset_size
;
4720 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
4721 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
4722 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
4723 offset_size
= initial_length_size
== 4 ? 4 : 8;
4724 info_ptr
+= initial_length_size
;
4726 version
= read_2_bytes (abfd
, info_ptr
);
4730 /* Skip unit type and address size. */
4734 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
4737 /* Allocate a new partial symtab for file named NAME and mark this new
4738 partial symtab as being an include of PST. */
4741 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
4742 struct objfile
*objfile
)
4744 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
4746 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
4748 /* It shares objfile->objfile_obstack. */
4749 subpst
->dirname
= pst
->dirname
;
4752 subpst
->textlow
= 0;
4753 subpst
->texthigh
= 0;
4755 subpst
->dependencies
4756 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
4757 subpst
->dependencies
[0] = pst
;
4758 subpst
->number_of_dependencies
= 1;
4760 subpst
->globals_offset
= 0;
4761 subpst
->n_global_syms
= 0;
4762 subpst
->statics_offset
= 0;
4763 subpst
->n_static_syms
= 0;
4764 subpst
->compunit_symtab
= NULL
;
4765 subpst
->read_symtab
= pst
->read_symtab
;
4768 /* No private part is necessary for include psymtabs. This property
4769 can be used to differentiate between such include psymtabs and
4770 the regular ones. */
4771 subpst
->read_symtab_private
= NULL
;
4774 /* Read the Line Number Program data and extract the list of files
4775 included by the source file represented by PST. Build an include
4776 partial symtab for each of these included files. */
4779 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
4780 struct die_info
*die
,
4781 struct partial_symtab
*pst
)
4784 struct attribute
*attr
;
4786 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
4788 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
4790 return; /* No linetable, so no includes. */
4792 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
4793 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
4797 hash_signatured_type (const void *item
)
4799 const struct signatured_type
*sig_type
4800 = (const struct signatured_type
*) item
;
4802 /* This drops the top 32 bits of the signature, but is ok for a hash. */
4803 return sig_type
->signature
;
4807 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
4809 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
4810 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
4812 return lhs
->signature
== rhs
->signature
;
4815 /* Allocate a hash table for signatured types. */
4818 allocate_signatured_type_table (struct objfile
*objfile
)
4820 return htab_create_alloc_ex (41,
4821 hash_signatured_type
,
4824 &objfile
->objfile_obstack
,
4825 hashtab_obstack_allocate
,
4826 dummy_obstack_deallocate
);
4829 /* A helper function to add a signatured type CU to a table. */
4832 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4834 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
4835 struct signatured_type
***datap
= (struct signatured_type
***) datum
;
4843 /* A helper for create_debug_types_hash_table. Read types from SECTION
4844 and fill them into TYPES_HTAB. It will process only type units,
4845 therefore DW_UT_type. */
4848 create_debug_type_hash_table (struct dwo_file
*dwo_file
,
4849 dwarf2_section_info
*section
, htab_t
&types_htab
,
4850 rcuh_kind section_kind
)
4852 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4853 struct dwarf2_section_info
*abbrev_section
;
4855 const gdb_byte
*info_ptr
, *end_ptr
;
4857 abbrev_section
= (dwo_file
!= NULL
4858 ? &dwo_file
->sections
.abbrev
4859 : &dwarf2_per_objfile
->abbrev
);
4861 if (dwarf_read_debug
)
4862 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
4863 get_section_name (section
),
4864 get_section_file_name (abbrev_section
));
4866 dwarf2_read_section (objfile
, section
);
4867 info_ptr
= section
->buffer
;
4869 if (info_ptr
== NULL
)
4872 /* We can't set abfd until now because the section may be empty or
4873 not present, in which case the bfd is unknown. */
4874 abfd
= get_section_bfd_owner (section
);
4876 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4877 because we don't need to read any dies: the signature is in the
4880 end_ptr
= info_ptr
+ section
->size
;
4881 while (info_ptr
< end_ptr
)
4883 struct signatured_type
*sig_type
;
4884 struct dwo_unit
*dwo_tu
;
4886 const gdb_byte
*ptr
= info_ptr
;
4887 struct comp_unit_head header
;
4888 unsigned int length
;
4890 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
4892 /* Initialize it due to a false compiler warning. */
4893 header
.signature
= -1;
4894 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
4896 /* We need to read the type's signature in order to build the hash
4897 table, but we don't need anything else just yet. */
4899 ptr
= read_and_check_comp_unit_head (&header
, section
,
4900 abbrev_section
, ptr
, section_kind
);
4902 length
= get_cu_length (&header
);
4904 /* Skip dummy type units. */
4905 if (ptr
>= info_ptr
+ length
4906 || peek_abbrev_code (abfd
, ptr
) == 0
4907 || header
.unit_type
!= DW_UT_type
)
4913 if (types_htab
== NULL
)
4916 types_htab
= allocate_dwo_unit_table (objfile
);
4918 types_htab
= allocate_signatured_type_table (objfile
);
4924 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4926 dwo_tu
->dwo_file
= dwo_file
;
4927 dwo_tu
->signature
= header
.signature
;
4928 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
4929 dwo_tu
->section
= section
;
4930 dwo_tu
->sect_off
= sect_off
;
4931 dwo_tu
->length
= length
;
4935 /* N.B.: type_offset is not usable if this type uses a DWO file.
4936 The real type_offset is in the DWO file. */
4938 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4939 struct signatured_type
);
4940 sig_type
->signature
= header
.signature
;
4941 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
4942 sig_type
->per_cu
.objfile
= objfile
;
4943 sig_type
->per_cu
.is_debug_types
= 1;
4944 sig_type
->per_cu
.section
= section
;
4945 sig_type
->per_cu
.sect_off
= sect_off
;
4946 sig_type
->per_cu
.length
= length
;
4949 slot
= htab_find_slot (types_htab
,
4950 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4952 gdb_assert (slot
!= NULL
);
4955 sect_offset dup_sect_off
;
4959 const struct dwo_unit
*dup_tu
4960 = (const struct dwo_unit
*) *slot
;
4962 dup_sect_off
= dup_tu
->sect_off
;
4966 const struct signatured_type
*dup_tu
4967 = (const struct signatured_type
*) *slot
;
4969 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
4972 complaint (&symfile_complaints
,
4973 _("debug type entry at offset 0x%x is duplicate to"
4974 " the entry at offset 0x%x, signature %s"),
4975 to_underlying (sect_off
), to_underlying (dup_sect_off
),
4976 hex_string (header
.signature
));
4978 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4980 if (dwarf_read_debug
> 1)
4981 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature %s\n",
4982 to_underlying (sect_off
),
4983 hex_string (header
.signature
));
4989 /* Create the hash table of all entries in the .debug_types
4990 (or .debug_types.dwo) section(s).
4991 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
4992 otherwise it is NULL.
4994 The result is a pointer to the hash table or NULL if there are no types.
4996 Note: This function processes DWO files only, not DWP files. */
4999 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
5000 VEC (dwarf2_section_info_def
) *types
,
5004 struct dwarf2_section_info
*section
;
5006 if (VEC_empty (dwarf2_section_info_def
, types
))
5010 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
5012 create_debug_type_hash_table (dwo_file
, section
, types_htab
,
5016 /* Create the hash table of all entries in the .debug_types section,
5017 and initialize all_type_units.
5018 The result is zero if there is an error (e.g. missing .debug_types section),
5019 otherwise non-zero. */
5022 create_all_type_units (struct objfile
*objfile
)
5024 htab_t types_htab
= NULL
;
5025 struct signatured_type
**iter
;
5027 create_debug_type_hash_table (NULL
, &dwarf2_per_objfile
->info
, types_htab
,
5028 rcuh_kind::COMPILE
);
5029 create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
, types_htab
);
5030 if (types_htab
== NULL
)
5032 dwarf2_per_objfile
->signatured_types
= NULL
;
5036 dwarf2_per_objfile
->signatured_types
= types_htab
;
5038 dwarf2_per_objfile
->n_type_units
5039 = dwarf2_per_objfile
->n_allocated_type_units
5040 = htab_elements (types_htab
);
5041 dwarf2_per_objfile
->all_type_units
=
5042 XNEWVEC (struct signatured_type
*, dwarf2_per_objfile
->n_type_units
);
5043 iter
= &dwarf2_per_objfile
->all_type_units
[0];
5044 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
5045 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
5046 == dwarf2_per_objfile
->n_type_units
);
5051 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
5052 If SLOT is non-NULL, it is the entry to use in the hash table.
5053 Otherwise we find one. */
5055 static struct signatured_type
*
5056 add_type_unit (ULONGEST sig
, void **slot
)
5058 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5059 int n_type_units
= dwarf2_per_objfile
->n_type_units
;
5060 struct signatured_type
*sig_type
;
5062 gdb_assert (n_type_units
<= dwarf2_per_objfile
->n_allocated_type_units
);
5064 if (n_type_units
> dwarf2_per_objfile
->n_allocated_type_units
)
5066 if (dwarf2_per_objfile
->n_allocated_type_units
== 0)
5067 dwarf2_per_objfile
->n_allocated_type_units
= 1;
5068 dwarf2_per_objfile
->n_allocated_type_units
*= 2;
5069 dwarf2_per_objfile
->all_type_units
5070 = XRESIZEVEC (struct signatured_type
*,
5071 dwarf2_per_objfile
->all_type_units
,
5072 dwarf2_per_objfile
->n_allocated_type_units
);
5073 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
5075 dwarf2_per_objfile
->n_type_units
= n_type_units
;
5077 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5078 struct signatured_type
);
5079 dwarf2_per_objfile
->all_type_units
[n_type_units
- 1] = sig_type
;
5080 sig_type
->signature
= sig
;
5081 sig_type
->per_cu
.is_debug_types
= 1;
5082 if (dwarf2_per_objfile
->using_index
)
5084 sig_type
->per_cu
.v
.quick
=
5085 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5086 struct dwarf2_per_cu_quick_data
);
5091 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5094 gdb_assert (*slot
== NULL
);
5096 /* The rest of sig_type must be filled in by the caller. */
5100 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
5101 Fill in SIG_ENTRY with DWO_ENTRY. */
5104 fill_in_sig_entry_from_dwo_entry (struct objfile
*objfile
,
5105 struct signatured_type
*sig_entry
,
5106 struct dwo_unit
*dwo_entry
)
5108 /* Make sure we're not clobbering something we don't expect to. */
5109 gdb_assert (! sig_entry
->per_cu
.queued
);
5110 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
5111 if (dwarf2_per_objfile
->using_index
)
5113 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
5114 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
5117 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
5118 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
5119 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
5120 gdb_assert (sig_entry
->type_unit_group
== NULL
);
5121 gdb_assert (sig_entry
->dwo_unit
== NULL
);
5123 sig_entry
->per_cu
.section
= dwo_entry
->section
;
5124 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
5125 sig_entry
->per_cu
.length
= dwo_entry
->length
;
5126 sig_entry
->per_cu
.reading_dwo_directly
= 1;
5127 sig_entry
->per_cu
.objfile
= objfile
;
5128 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
5129 sig_entry
->dwo_unit
= dwo_entry
;
5132 /* Subroutine of lookup_signatured_type.
5133 If we haven't read the TU yet, create the signatured_type data structure
5134 for a TU to be read in directly from a DWO file, bypassing the stub.
5135 This is the "Stay in DWO Optimization": When there is no DWP file and we're
5136 using .gdb_index, then when reading a CU we want to stay in the DWO file
5137 containing that CU. Otherwise we could end up reading several other DWO
5138 files (due to comdat folding) to process the transitive closure of all the
5139 mentioned TUs, and that can be slow. The current DWO file will have every
5140 type signature that it needs.
5141 We only do this for .gdb_index because in the psymtab case we already have
5142 to read all the DWOs to build the type unit groups. */
5144 static struct signatured_type
*
5145 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5147 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5148 struct dwo_file
*dwo_file
;
5149 struct dwo_unit find_dwo_entry
, *dwo_entry
;
5150 struct signatured_type find_sig_entry
, *sig_entry
;
5153 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5155 /* If TU skeletons have been removed then we may not have read in any
5157 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5159 dwarf2_per_objfile
->signatured_types
5160 = allocate_signatured_type_table (objfile
);
5163 /* We only ever need to read in one copy of a signatured type.
5164 Use the global signatured_types array to do our own comdat-folding
5165 of types. If this is the first time we're reading this TU, and
5166 the TU has an entry in .gdb_index, replace the recorded data from
5167 .gdb_index with this TU. */
5169 find_sig_entry
.signature
= sig
;
5170 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5171 &find_sig_entry
, INSERT
);
5172 sig_entry
= (struct signatured_type
*) *slot
;
5174 /* We can get here with the TU already read, *or* in the process of being
5175 read. Don't reassign the global entry to point to this DWO if that's
5176 the case. Also note that if the TU is already being read, it may not
5177 have come from a DWO, the program may be a mix of Fission-compiled
5178 code and non-Fission-compiled code. */
5180 /* Have we already tried to read this TU?
5181 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5182 needn't exist in the global table yet). */
5183 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
5186 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
5187 dwo_unit of the TU itself. */
5188 dwo_file
= cu
->dwo_unit
->dwo_file
;
5190 /* Ok, this is the first time we're reading this TU. */
5191 if (dwo_file
->tus
== NULL
)
5193 find_dwo_entry
.signature
= sig
;
5194 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
5195 if (dwo_entry
== NULL
)
5198 /* If the global table doesn't have an entry for this TU, add one. */
5199 if (sig_entry
== NULL
)
5200 sig_entry
= add_type_unit (sig
, slot
);
5202 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5203 sig_entry
->per_cu
.tu_read
= 1;
5207 /* Subroutine of lookup_signatured_type.
5208 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
5209 then try the DWP file. If the TU stub (skeleton) has been removed then
5210 it won't be in .gdb_index. */
5212 static struct signatured_type
*
5213 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5215 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5216 struct dwp_file
*dwp_file
= get_dwp_file ();
5217 struct dwo_unit
*dwo_entry
;
5218 struct signatured_type find_sig_entry
, *sig_entry
;
5221 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
5222 gdb_assert (dwp_file
!= NULL
);
5224 /* If TU skeletons have been removed then we may not have read in any
5226 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5228 dwarf2_per_objfile
->signatured_types
5229 = allocate_signatured_type_table (objfile
);
5232 find_sig_entry
.signature
= sig
;
5233 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
5234 &find_sig_entry
, INSERT
);
5235 sig_entry
= (struct signatured_type
*) *slot
;
5237 /* Have we already tried to read this TU?
5238 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
5239 needn't exist in the global table yet). */
5240 if (sig_entry
!= NULL
)
5243 if (dwp_file
->tus
== NULL
)
5245 dwo_entry
= lookup_dwo_unit_in_dwp (dwp_file
, NULL
,
5246 sig
, 1 /* is_debug_types */);
5247 if (dwo_entry
== NULL
)
5250 sig_entry
= add_type_unit (sig
, slot
);
5251 fill_in_sig_entry_from_dwo_entry (objfile
, sig_entry
, dwo_entry
);
5256 /* Lookup a signature based type for DW_FORM_ref_sig8.
5257 Returns NULL if signature SIG is not present in the table.
5258 It is up to the caller to complain about this. */
5260 static struct signatured_type
*
5261 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
5264 && dwarf2_per_objfile
->using_index
)
5266 /* We're in a DWO/DWP file, and we're using .gdb_index.
5267 These cases require special processing. */
5268 if (get_dwp_file () == NULL
)
5269 return lookup_dwo_signatured_type (cu
, sig
);
5271 return lookup_dwp_signatured_type (cu
, sig
);
5275 struct signatured_type find_entry
, *entry
;
5277 if (dwarf2_per_objfile
->signatured_types
== NULL
)
5279 find_entry
.signature
= sig
;
5280 entry
= ((struct signatured_type
*)
5281 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
5286 /* Low level DIE reading support. */
5288 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
5291 init_cu_die_reader (struct die_reader_specs
*reader
,
5292 struct dwarf2_cu
*cu
,
5293 struct dwarf2_section_info
*section
,
5294 struct dwo_file
*dwo_file
)
5296 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
5297 reader
->abfd
= get_section_bfd_owner (section
);
5299 reader
->dwo_file
= dwo_file
;
5300 reader
->die_section
= section
;
5301 reader
->buffer
= section
->buffer
;
5302 reader
->buffer_end
= section
->buffer
+ section
->size
;
5303 reader
->comp_dir
= NULL
;
5306 /* Subroutine of init_cutu_and_read_dies to simplify it.
5307 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
5308 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
5311 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
5312 from it to the DIE in the DWO. If NULL we are skipping the stub.
5313 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
5314 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
5315 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
5316 STUB_COMP_DIR may be non-NULL.
5317 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
5318 are filled in with the info of the DIE from the DWO file.
5319 ABBREV_TABLE_PROVIDED is non-zero if the caller of init_cutu_and_read_dies
5320 provided an abbrev table to use.
5321 The result is non-zero if a valid (non-dummy) DIE was found. */
5324 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
5325 struct dwo_unit
*dwo_unit
,
5326 int abbrev_table_provided
,
5327 struct die_info
*stub_comp_unit_die
,
5328 const char *stub_comp_dir
,
5329 struct die_reader_specs
*result_reader
,
5330 const gdb_byte
**result_info_ptr
,
5331 struct die_info
**result_comp_unit_die
,
5332 int *result_has_children
)
5334 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5335 struct dwarf2_cu
*cu
= this_cu
->cu
;
5336 struct dwarf2_section_info
*section
;
5338 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5339 ULONGEST signature
; /* Or dwo_id. */
5340 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
5341 int i
,num_extra_attrs
;
5342 struct dwarf2_section_info
*dwo_abbrev_section
;
5343 struct attribute
*attr
;
5344 struct die_info
*comp_unit_die
;
5346 /* At most one of these may be provided. */
5347 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
5349 /* These attributes aren't processed until later:
5350 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
5351 DW_AT_comp_dir is used now, to find the DWO file, but it is also
5352 referenced later. However, these attributes are found in the stub
5353 which we won't have later. In order to not impose this complication
5354 on the rest of the code, we read them here and copy them to the
5363 if (stub_comp_unit_die
!= NULL
)
5365 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
5367 if (! this_cu
->is_debug_types
)
5368 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
5369 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
5370 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
5371 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
5372 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
5374 /* There should be a DW_AT_addr_base attribute here (if needed).
5375 We need the value before we can process DW_FORM_GNU_addr_index. */
5377 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
5379 cu
->addr_base
= DW_UNSND (attr
);
5381 /* There should be a DW_AT_ranges_base attribute here (if needed).
5382 We need the value before we can process DW_AT_ranges. */
5383 cu
->ranges_base
= 0;
5384 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
5386 cu
->ranges_base
= DW_UNSND (attr
);
5388 else if (stub_comp_dir
!= NULL
)
5390 /* Reconstruct the comp_dir attribute to simplify the code below. */
5391 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
5392 comp_dir
->name
= DW_AT_comp_dir
;
5393 comp_dir
->form
= DW_FORM_string
;
5394 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
5395 DW_STRING (comp_dir
) = stub_comp_dir
;
5398 /* Set up for reading the DWO CU/TU. */
5399 cu
->dwo_unit
= dwo_unit
;
5400 section
= dwo_unit
->section
;
5401 dwarf2_read_section (objfile
, section
);
5402 abfd
= get_section_bfd_owner (section
);
5403 begin_info_ptr
= info_ptr
= (section
->buffer
5404 + to_underlying (dwo_unit
->sect_off
));
5405 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
5406 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
);
5408 if (this_cu
->is_debug_types
)
5410 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
5412 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5414 info_ptr
, rcuh_kind::TYPE
);
5415 /* This is not an assert because it can be caused by bad debug info. */
5416 if (sig_type
->signature
!= cu
->header
.signature
)
5418 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
5419 " TU at offset 0x%x [in module %s]"),
5420 hex_string (sig_type
->signature
),
5421 hex_string (cu
->header
.signature
),
5422 to_underlying (dwo_unit
->sect_off
),
5423 bfd_get_filename (abfd
));
5425 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
5426 /* For DWOs coming from DWP files, we don't know the CU length
5427 nor the type's offset in the TU until now. */
5428 dwo_unit
->length
= get_cu_length (&cu
->header
);
5429 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
5431 /* Establish the type offset that can be used to lookup the type.
5432 For DWO files, we don't know it until now. */
5433 sig_type
->type_offset_in_section
5434 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
5438 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5440 info_ptr
, rcuh_kind::COMPILE
);
5441 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
5442 /* For DWOs coming from DWP files, we don't know the CU length
5444 dwo_unit
->length
= get_cu_length (&cu
->header
);
5447 /* Replace the CU's original abbrev table with the DWO's.
5448 Reminder: We can't read the abbrev table until we've read the header. */
5449 if (abbrev_table_provided
)
5451 /* Don't free the provided abbrev table, the caller of
5452 init_cutu_and_read_dies owns it. */
5453 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5454 /* Ensure the DWO abbrev table gets freed. */
5455 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5459 dwarf2_free_abbrev_table (cu
);
5460 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
5461 /* Leave any existing abbrev table cleanup as is. */
5464 /* Read in the die, but leave space to copy over the attributes
5465 from the stub. This has the benefit of simplifying the rest of
5466 the code - all the work to maintain the illusion of a single
5467 DW_TAG_{compile,type}_unit DIE is done here. */
5468 num_extra_attrs
= ((stmt_list
!= NULL
)
5472 + (comp_dir
!= NULL
));
5473 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
5474 result_has_children
, num_extra_attrs
);
5476 /* Copy over the attributes from the stub to the DIE we just read in. */
5477 comp_unit_die
= *result_comp_unit_die
;
5478 i
= comp_unit_die
->num_attrs
;
5479 if (stmt_list
!= NULL
)
5480 comp_unit_die
->attrs
[i
++] = *stmt_list
;
5482 comp_unit_die
->attrs
[i
++] = *low_pc
;
5483 if (high_pc
!= NULL
)
5484 comp_unit_die
->attrs
[i
++] = *high_pc
;
5486 comp_unit_die
->attrs
[i
++] = *ranges
;
5487 if (comp_dir
!= NULL
)
5488 comp_unit_die
->attrs
[i
++] = *comp_dir
;
5489 comp_unit_die
->num_attrs
+= num_extra_attrs
;
5491 if (dwarf_die_debug
)
5493 fprintf_unfiltered (gdb_stdlog
,
5494 "Read die from %s@0x%x of %s:\n",
5495 get_section_name (section
),
5496 (unsigned) (begin_info_ptr
- section
->buffer
),
5497 bfd_get_filename (abfd
));
5498 dump_die (comp_unit_die
, dwarf_die_debug
);
5501 /* Save the comp_dir attribute. If there is no DWP file then we'll read
5502 TUs by skipping the stub and going directly to the entry in the DWO file.
5503 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
5504 to get it via circuitous means. Blech. */
5505 if (comp_dir
!= NULL
)
5506 result_reader
->comp_dir
= DW_STRING (comp_dir
);
5508 /* Skip dummy compilation units. */
5509 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
5510 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5513 *result_info_ptr
= info_ptr
;
5517 /* Subroutine of init_cutu_and_read_dies to simplify it.
5518 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
5519 Returns NULL if the specified DWO unit cannot be found. */
5521 static struct dwo_unit
*
5522 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
5523 struct die_info
*comp_unit_die
)
5525 struct dwarf2_cu
*cu
= this_cu
->cu
;
5526 struct attribute
*attr
;
5528 struct dwo_unit
*dwo_unit
;
5529 const char *comp_dir
, *dwo_name
;
5531 gdb_assert (cu
!= NULL
);
5533 /* Yeah, we look dwo_name up again, but it simplifies the code. */
5534 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5535 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
5537 if (this_cu
->is_debug_types
)
5539 struct signatured_type
*sig_type
;
5541 /* Since this_cu is the first member of struct signatured_type,
5542 we can go from a pointer to one to a pointer to the other. */
5543 sig_type
= (struct signatured_type
*) this_cu
;
5544 signature
= sig_type
->signature
;
5545 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
5549 struct attribute
*attr
;
5551 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
5553 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
5555 dwo_name
, objfile_name (this_cu
->objfile
));
5556 signature
= DW_UNSND (attr
);
5557 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
5564 /* Subroutine of init_cutu_and_read_dies to simplify it.
5565 See it for a description of the parameters.
5566 Read a TU directly from a DWO file, bypassing the stub.
5568 Note: This function could be a little bit simpler if we shared cleanups
5569 with our caller, init_cutu_and_read_dies. That's generally a fragile thing
5570 to do, so we keep this function self-contained. Or we could move this
5571 into our caller, but it's complex enough already. */
5574 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
5575 int use_existing_cu
, int keep
,
5576 die_reader_func_ftype
*die_reader_func
,
5579 struct dwarf2_cu
*cu
;
5580 struct signatured_type
*sig_type
;
5581 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5582 struct die_reader_specs reader
;
5583 const gdb_byte
*info_ptr
;
5584 struct die_info
*comp_unit_die
;
5587 /* Verify we can do the following downcast, and that we have the
5589 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
5590 sig_type
= (struct signatured_type
*) this_cu
;
5591 gdb_assert (sig_type
->dwo_unit
!= NULL
);
5593 cleanups
= make_cleanup (null_cleanup
, NULL
);
5595 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5597 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
5599 /* There's no need to do the rereading_dwo_cu handling that
5600 init_cutu_and_read_dies does since we don't read the stub. */
5604 /* If !use_existing_cu, this_cu->cu must be NULL. */
5605 gdb_assert (this_cu
->cu
== NULL
);
5606 cu
= XNEW (struct dwarf2_cu
);
5607 init_one_comp_unit (cu
, this_cu
);
5608 /* If an error occurs while loading, release our storage. */
5609 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5612 /* A future optimization, if needed, would be to use an existing
5613 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
5614 could share abbrev tables. */
5616 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
5617 0 /* abbrev_table_provided */,
5618 NULL
/* stub_comp_unit_die */,
5619 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
5621 &comp_unit_die
, &has_children
) == 0)
5624 do_cleanups (cleanups
);
5628 /* All the "real" work is done here. */
5629 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5631 /* This duplicates the code in init_cutu_and_read_dies,
5632 but the alternative is making the latter more complex.
5633 This function is only for the special case of using DWO files directly:
5634 no point in overly complicating the general case just to handle this. */
5635 if (free_cu_cleanup
!= NULL
)
5639 /* We've successfully allocated this compilation unit. Let our
5640 caller clean it up when finished with it. */
5641 discard_cleanups (free_cu_cleanup
);
5643 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5644 So we have to manually free the abbrev table. */
5645 dwarf2_free_abbrev_table (cu
);
5647 /* Link this CU into read_in_chain. */
5648 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5649 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5652 do_cleanups (free_cu_cleanup
);
5655 do_cleanups (cleanups
);
5658 /* Initialize a CU (or TU) and read its DIEs.
5659 If the CU defers to a DWO file, read the DWO file as well.
5661 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
5662 Otherwise the table specified in the comp unit header is read in and used.
5663 This is an optimization for when we already have the abbrev table.
5665 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
5666 Otherwise, a new CU is allocated with xmalloc.
5668 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
5669 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
5671 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5672 linker) then DIE_READER_FUNC will not get called. */
5675 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
5676 struct abbrev_table
*abbrev_table
,
5677 int use_existing_cu
, int keep
,
5678 die_reader_func_ftype
*die_reader_func
,
5681 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5682 struct dwarf2_section_info
*section
= this_cu
->section
;
5683 bfd
*abfd
= get_section_bfd_owner (section
);
5684 struct dwarf2_cu
*cu
;
5685 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5686 struct die_reader_specs reader
;
5687 struct die_info
*comp_unit_die
;
5689 struct attribute
*attr
;
5690 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
5691 struct signatured_type
*sig_type
= NULL
;
5692 struct dwarf2_section_info
*abbrev_section
;
5693 /* Non-zero if CU currently points to a DWO file and we need to
5694 reread it. When this happens we need to reread the skeleton die
5695 before we can reread the DWO file (this only applies to CUs, not TUs). */
5696 int rereading_dwo_cu
= 0;
5698 if (dwarf_die_debug
)
5699 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5700 this_cu
->is_debug_types
? "type" : "comp",
5701 to_underlying (this_cu
->sect_off
));
5703 if (use_existing_cu
)
5706 /* If we're reading a TU directly from a DWO file, including a virtual DWO
5707 file (instead of going through the stub), short-circuit all of this. */
5708 if (this_cu
->reading_dwo_directly
)
5710 /* Narrow down the scope of possibilities to have to understand. */
5711 gdb_assert (this_cu
->is_debug_types
);
5712 gdb_assert (abbrev_table
== NULL
);
5713 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
5714 die_reader_func
, data
);
5718 cleanups
= make_cleanup (null_cleanup
, NULL
);
5720 /* This is cheap if the section is already read in. */
5721 dwarf2_read_section (objfile
, section
);
5723 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
5725 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
5727 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
5730 /* If this CU is from a DWO file we need to start over, we need to
5731 refetch the attributes from the skeleton CU.
5732 This could be optimized by retrieving those attributes from when we
5733 were here the first time: the previous comp_unit_die was stored in
5734 comp_unit_obstack. But there's no data yet that we need this
5736 if (cu
->dwo_unit
!= NULL
)
5737 rereading_dwo_cu
= 1;
5741 /* If !use_existing_cu, this_cu->cu must be NULL. */
5742 gdb_assert (this_cu
->cu
== NULL
);
5743 cu
= XNEW (struct dwarf2_cu
);
5744 init_one_comp_unit (cu
, this_cu
);
5745 /* If an error occurs while loading, release our storage. */
5746 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
5749 /* Get the header. */
5750 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
5752 /* We already have the header, there's no need to read it in again. */
5753 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
5757 if (this_cu
->is_debug_types
)
5759 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5760 abbrev_section
, info_ptr
,
5763 /* Since per_cu is the first member of struct signatured_type,
5764 we can go from a pointer to one to a pointer to the other. */
5765 sig_type
= (struct signatured_type
*) this_cu
;
5766 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
5767 gdb_assert (sig_type
->type_offset_in_tu
5768 == cu
->header
.type_cu_offset_in_tu
);
5769 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
5771 /* LENGTH has not been set yet for type units if we're
5772 using .gdb_index. */
5773 this_cu
->length
= get_cu_length (&cu
->header
);
5775 /* Establish the type offset that can be used to lookup the type. */
5776 sig_type
->type_offset_in_section
=
5777 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
5779 this_cu
->dwarf_version
= cu
->header
.version
;
5783 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
5786 rcuh_kind::COMPILE
);
5788 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
5789 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
5790 this_cu
->dwarf_version
= cu
->header
.version
;
5794 /* Skip dummy compilation units. */
5795 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5796 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5798 do_cleanups (cleanups
);
5802 /* If we don't have them yet, read the abbrevs for this compilation unit.
5803 And if we need to read them now, make sure they're freed when we're
5804 done. Note that it's important that if the CU had an abbrev table
5805 on entry we don't free it when we're done: Somewhere up the call stack
5806 it may be in use. */
5807 if (abbrev_table
!= NULL
)
5809 gdb_assert (cu
->abbrev_table
== NULL
);
5810 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
5811 cu
->abbrev_table
= abbrev_table
;
5813 else if (cu
->abbrev_table
== NULL
)
5815 dwarf2_read_abbrevs (cu
, abbrev_section
);
5816 make_cleanup (dwarf2_free_abbrev_table
, cu
);
5818 else if (rereading_dwo_cu
)
5820 dwarf2_free_abbrev_table (cu
);
5821 dwarf2_read_abbrevs (cu
, abbrev_section
);
5824 /* Read the top level CU/TU die. */
5825 init_cu_die_reader (&reader
, cu
, section
, NULL
);
5826 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5828 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
5830 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
5831 DWO CU, that this test will fail (the attribute will not be present). */
5832 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
5835 struct dwo_unit
*dwo_unit
;
5836 struct die_info
*dwo_comp_unit_die
;
5840 complaint (&symfile_complaints
,
5841 _("compilation unit with DW_AT_GNU_dwo_name"
5842 " has children (offset 0x%x) [in module %s]"),
5843 to_underlying (this_cu
->sect_off
), bfd_get_filename (abfd
));
5845 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
5846 if (dwo_unit
!= NULL
)
5848 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
5849 abbrev_table
!= NULL
,
5850 comp_unit_die
, NULL
,
5852 &dwo_comp_unit_die
, &has_children
) == 0)
5855 do_cleanups (cleanups
);
5858 comp_unit_die
= dwo_comp_unit_die
;
5862 /* Yikes, we couldn't find the rest of the DIE, we only have
5863 the stub. A complaint has already been logged. There's
5864 not much more we can do except pass on the stub DIE to
5865 die_reader_func. We don't want to throw an error on bad
5870 /* All of the above is setup for this call. Yikes. */
5871 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5873 /* Done, clean up. */
5874 if (free_cu_cleanup
!= NULL
)
5878 /* We've successfully allocated this compilation unit. Let our
5879 caller clean it up when finished with it. */
5880 discard_cleanups (free_cu_cleanup
);
5882 /* We can only discard free_cu_cleanup and all subsequent cleanups.
5883 So we have to manually free the abbrev table. */
5884 dwarf2_free_abbrev_table (cu
);
5886 /* Link this CU into read_in_chain. */
5887 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5888 dwarf2_per_objfile
->read_in_chain
= this_cu
;
5891 do_cleanups (free_cu_cleanup
);
5894 do_cleanups (cleanups
);
5897 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
5898 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
5899 to have already done the lookup to find the DWO file).
5901 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
5902 THIS_CU->is_debug_types, but nothing else.
5904 We fill in THIS_CU->length.
5906 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
5907 linker) then DIE_READER_FUNC will not get called.
5909 THIS_CU->cu is always freed when done.
5910 This is done in order to not leave THIS_CU->cu in a state where we have
5911 to care whether it refers to the "main" CU or the DWO CU. */
5914 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
5915 struct dwo_file
*dwo_file
,
5916 die_reader_func_ftype
*die_reader_func
,
5919 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5920 struct dwarf2_section_info
*section
= this_cu
->section
;
5921 bfd
*abfd
= get_section_bfd_owner (section
);
5922 struct dwarf2_section_info
*abbrev_section
;
5923 struct dwarf2_cu cu
;
5924 const gdb_byte
*begin_info_ptr
, *info_ptr
;
5925 struct die_reader_specs reader
;
5926 struct cleanup
*cleanups
;
5927 struct die_info
*comp_unit_die
;
5930 if (dwarf_die_debug
)
5931 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
5932 this_cu
->is_debug_types
? "type" : "comp",
5933 to_underlying (this_cu
->sect_off
));
5935 gdb_assert (this_cu
->cu
== NULL
);
5937 abbrev_section
= (dwo_file
!= NULL
5938 ? &dwo_file
->sections
.abbrev
5939 : get_abbrev_section_for_cu (this_cu
));
5941 /* This is cheap if the section is already read in. */
5942 dwarf2_read_section (objfile
, section
);
5944 init_one_comp_unit (&cu
, this_cu
);
5946 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
5948 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
5949 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
5950 abbrev_section
, info_ptr
,
5951 (this_cu
->is_debug_types
5953 : rcuh_kind::COMPILE
));
5955 this_cu
->length
= get_cu_length (&cu
.header
);
5957 /* Skip dummy compilation units. */
5958 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
5959 || peek_abbrev_code (abfd
, info_ptr
) == 0)
5961 do_cleanups (cleanups
);
5965 dwarf2_read_abbrevs (&cu
, abbrev_section
);
5966 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
5968 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
5969 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
5971 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
5973 do_cleanups (cleanups
);
5976 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
5977 does not lookup the specified DWO file.
5978 This cannot be used to read DWO files.
5980 THIS_CU->cu is always freed when done.
5981 This is done in order to not leave THIS_CU->cu in a state where we have
5982 to care whether it refers to the "main" CU or the DWO CU.
5983 We can revisit this if the data shows there's a performance issue. */
5986 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
5987 die_reader_func_ftype
*die_reader_func
,
5990 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
5993 /* Type Unit Groups.
5995 Type Unit Groups are a way to collapse the set of all TUs (type units) into
5996 a more manageable set. The grouping is done by DW_AT_stmt_list entry
5997 so that all types coming from the same compilation (.o file) are grouped
5998 together. A future step could be to put the types in the same symtab as
5999 the CU the types ultimately came from. */
6002 hash_type_unit_group (const void *item
)
6004 const struct type_unit_group
*tu_group
6005 = (const struct type_unit_group
*) item
;
6007 return hash_stmt_list_entry (&tu_group
->hash
);
6011 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
6013 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
6014 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
6016 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
6019 /* Allocate a hash table for type unit groups. */
6022 allocate_type_unit_groups_table (void)
6024 return htab_create_alloc_ex (3,
6025 hash_type_unit_group
,
6028 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
6029 hashtab_obstack_allocate
,
6030 dummy_obstack_deallocate
);
6033 /* Type units that don't have DW_AT_stmt_list are grouped into their own
6034 partial symtabs. We combine several TUs per psymtab to not let the size
6035 of any one psymtab grow too big. */
6036 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
6037 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
6039 /* Helper routine for get_type_unit_group.
6040 Create the type_unit_group object used to hold one or more TUs. */
6042 static struct type_unit_group
*
6043 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
6045 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6046 struct dwarf2_per_cu_data
*per_cu
;
6047 struct type_unit_group
*tu_group
;
6049 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6050 struct type_unit_group
);
6051 per_cu
= &tu_group
->per_cu
;
6052 per_cu
->objfile
= objfile
;
6054 if (dwarf2_per_objfile
->using_index
)
6056 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6057 struct dwarf2_per_cu_quick_data
);
6061 unsigned int line_offset
= to_underlying (line_offset_struct
);
6062 struct partial_symtab
*pst
;
6065 /* Give the symtab a useful name for debug purposes. */
6066 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
6067 name
= xstrprintf ("<type_units_%d>",
6068 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
6070 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
6072 pst
= create_partial_symtab (per_cu
, name
);
6078 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
6079 tu_group
->hash
.line_sect_off
= line_offset_struct
;
6084 /* Look up the type_unit_group for type unit CU, and create it if necessary.
6085 STMT_LIST is a DW_AT_stmt_list attribute. */
6087 static struct type_unit_group
*
6088 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
6090 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6091 struct type_unit_group
*tu_group
;
6093 unsigned int line_offset
;
6094 struct type_unit_group type_unit_group_for_lookup
;
6096 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
6098 dwarf2_per_objfile
->type_unit_groups
=
6099 allocate_type_unit_groups_table ();
6102 /* Do we need to create a new group, or can we use an existing one? */
6106 line_offset
= DW_UNSND (stmt_list
);
6107 ++tu_stats
->nr_symtab_sharers
;
6111 /* Ugh, no stmt_list. Rare, but we have to handle it.
6112 We can do various things here like create one group per TU or
6113 spread them over multiple groups to split up the expansion work.
6114 To avoid worst case scenarios (too many groups or too large groups)
6115 we, umm, group them in bunches. */
6116 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
6117 | (tu_stats
->nr_stmt_less_type_units
6118 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
6119 ++tu_stats
->nr_stmt_less_type_units
;
6122 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
6123 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
6124 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
6125 &type_unit_group_for_lookup
, INSERT
);
6128 tu_group
= (struct type_unit_group
*) *slot
;
6129 gdb_assert (tu_group
!= NULL
);
6133 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
6134 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
6136 ++tu_stats
->nr_symtabs
;
6142 /* Partial symbol tables. */
6144 /* Create a psymtab named NAME and assign it to PER_CU.
6146 The caller must fill in the following details:
6147 dirname, textlow, texthigh. */
6149 static struct partial_symtab
*
6150 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
6152 struct objfile
*objfile
= per_cu
->objfile
;
6153 struct partial_symtab
*pst
;
6155 pst
= start_psymtab_common (objfile
, name
, 0,
6156 objfile
->global_psymbols
.next
,
6157 objfile
->static_psymbols
.next
);
6159 pst
->psymtabs_addrmap_supported
= 1;
6161 /* This is the glue that links PST into GDB's symbol API. */
6162 pst
->read_symtab_private
= per_cu
;
6163 pst
->read_symtab
= dwarf2_read_symtab
;
6164 per_cu
->v
.psymtab
= pst
;
6169 /* The DATA object passed to process_psymtab_comp_unit_reader has this
6172 struct process_psymtab_comp_unit_data
6174 /* True if we are reading a DW_TAG_partial_unit. */
6176 int want_partial_unit
;
6178 /* The "pretend" language that is used if the CU doesn't declare a
6181 enum language pretend_language
;
6184 /* die_reader_func for process_psymtab_comp_unit. */
6187 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
6188 const gdb_byte
*info_ptr
,
6189 struct die_info
*comp_unit_die
,
6193 struct dwarf2_cu
*cu
= reader
->cu
;
6194 struct objfile
*objfile
= cu
->objfile
;
6195 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6196 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6198 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
6199 struct partial_symtab
*pst
;
6200 enum pc_bounds_kind cu_bounds_kind
;
6201 const char *filename
;
6202 struct process_psymtab_comp_unit_data
*info
6203 = (struct process_psymtab_comp_unit_data
*) data
;
6205 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
6208 gdb_assert (! per_cu
->is_debug_types
);
6210 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
6212 cu
->list_in_scope
= &file_symbols
;
6214 /* Allocate a new partial symbol table structure. */
6215 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
6216 if (filename
== NULL
)
6219 pst
= create_partial_symtab (per_cu
, filename
);
6221 /* This must be done before calling dwarf2_build_include_psymtabs. */
6222 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6224 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6226 dwarf2_find_base_address (comp_unit_die
, cu
);
6228 /* Possibly set the default values of LOWPC and HIGHPC from
6230 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
6231 &best_highpc
, cu
, pst
);
6232 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
6233 /* Store the contiguous range if it is not empty; it can be empty for
6234 CUs with no code. */
6235 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6236 gdbarch_adjust_dwarf2_addr (gdbarch
,
6237 best_lowpc
+ baseaddr
),
6238 gdbarch_adjust_dwarf2_addr (gdbarch
,
6239 best_highpc
+ baseaddr
) - 1,
6242 /* Check if comp unit has_children.
6243 If so, read the rest of the partial symbols from this comp unit.
6244 If not, there's no more debug_info for this comp unit. */
6247 struct partial_die_info
*first_die
;
6248 CORE_ADDR lowpc
, highpc
;
6250 lowpc
= ((CORE_ADDR
) -1);
6251 highpc
= ((CORE_ADDR
) 0);
6253 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6255 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
6256 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
6258 /* If we didn't find a lowpc, set it to highpc to avoid
6259 complaints from `maint check'. */
6260 if (lowpc
== ((CORE_ADDR
) -1))
6263 /* If the compilation unit didn't have an explicit address range,
6264 then use the information extracted from its child dies. */
6265 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
6268 best_highpc
= highpc
;
6271 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
6272 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
6274 end_psymtab_common (objfile
, pst
);
6276 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
6279 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6280 struct dwarf2_per_cu_data
*iter
;
6282 /* Fill in 'dependencies' here; we fill in 'users' in a
6284 pst
->number_of_dependencies
= len
;
6286 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6288 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
6291 pst
->dependencies
[i
] = iter
->v
.psymtab
;
6293 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
6296 /* Get the list of files included in the current compilation unit,
6297 and build a psymtab for each of them. */
6298 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
6300 if (dwarf_read_debug
)
6302 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6304 fprintf_unfiltered (gdb_stdlog
,
6305 "Psymtab for %s unit @0x%x: %s - %s"
6306 ", %d global, %d static syms\n",
6307 per_cu
->is_debug_types
? "type" : "comp",
6308 to_underlying (per_cu
->sect_off
),
6309 paddress (gdbarch
, pst
->textlow
),
6310 paddress (gdbarch
, pst
->texthigh
),
6311 pst
->n_global_syms
, pst
->n_static_syms
);
6315 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6316 Process compilation unit THIS_CU for a psymtab. */
6319 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6320 int want_partial_unit
,
6321 enum language pretend_language
)
6323 /* If this compilation unit was already read in, free the
6324 cached copy in order to read it in again. This is
6325 necessary because we skipped some symbols when we first
6326 read in the compilation unit (see load_partial_dies).
6327 This problem could be avoided, but the benefit is unclear. */
6328 if (this_cu
->cu
!= NULL
)
6329 free_one_cached_comp_unit (this_cu
);
6331 if (this_cu
->is_debug_types
)
6332 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
6336 process_psymtab_comp_unit_data info
;
6337 info
.want_partial_unit
= want_partial_unit
;
6338 info
.pretend_language
= pretend_language
;
6339 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
6340 process_psymtab_comp_unit_reader
, &info
);
6343 /* Age out any secondary CUs. */
6344 age_cached_comp_units ();
6347 /* Reader function for build_type_psymtabs. */
6350 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
6351 const gdb_byte
*info_ptr
,
6352 struct die_info
*type_unit_die
,
6356 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6357 struct dwarf2_cu
*cu
= reader
->cu
;
6358 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6359 struct signatured_type
*sig_type
;
6360 struct type_unit_group
*tu_group
;
6361 struct attribute
*attr
;
6362 struct partial_die_info
*first_die
;
6363 CORE_ADDR lowpc
, highpc
;
6364 struct partial_symtab
*pst
;
6366 gdb_assert (data
== NULL
);
6367 gdb_assert (per_cu
->is_debug_types
);
6368 sig_type
= (struct signatured_type
*) per_cu
;
6373 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
6374 tu_group
= get_type_unit_group (cu
, attr
);
6376 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
6378 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
6379 cu
->list_in_scope
= &file_symbols
;
6380 pst
= create_partial_symtab (per_cu
, "");
6383 first_die
= load_partial_dies (reader
, info_ptr
, 1);
6385 lowpc
= (CORE_ADDR
) -1;
6386 highpc
= (CORE_ADDR
) 0;
6387 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
6389 end_psymtab_common (objfile
, pst
);
6392 /* Struct used to sort TUs by their abbreviation table offset. */
6394 struct tu_abbrev_offset
6396 struct signatured_type
*sig_type
;
6397 sect_offset abbrev_offset
;
6400 /* Helper routine for build_type_psymtabs_1, passed to qsort. */
6403 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
6405 const struct tu_abbrev_offset
* const *a
6406 = (const struct tu_abbrev_offset
* const*) ap
;
6407 const struct tu_abbrev_offset
* const *b
6408 = (const struct tu_abbrev_offset
* const*) bp
;
6409 sect_offset aoff
= (*a
)->abbrev_offset
;
6410 sect_offset boff
= (*b
)->abbrev_offset
;
6412 return (aoff
> boff
) - (aoff
< boff
);
6415 /* Efficiently read all the type units.
6416 This does the bulk of the work for build_type_psymtabs.
6418 The efficiency is because we sort TUs by the abbrev table they use and
6419 only read each abbrev table once. In one program there are 200K TUs
6420 sharing 8K abbrev tables.
6422 The main purpose of this function is to support building the
6423 dwarf2_per_objfile->type_unit_groups table.
6424 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
6425 can collapse the search space by grouping them by stmt_list.
6426 The savings can be significant, in the same program from above the 200K TUs
6427 share 8K stmt_list tables.
6429 FUNC is expected to call get_type_unit_group, which will create the
6430 struct type_unit_group if necessary and add it to
6431 dwarf2_per_objfile->type_unit_groups. */
6434 build_type_psymtabs_1 (void)
6436 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6437 struct cleanup
*cleanups
;
6438 struct abbrev_table
*abbrev_table
;
6439 sect_offset abbrev_offset
;
6440 struct tu_abbrev_offset
*sorted_by_abbrev
;
6443 /* It's up to the caller to not call us multiple times. */
6444 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
6446 if (dwarf2_per_objfile
->n_type_units
== 0)
6449 /* TUs typically share abbrev tables, and there can be way more TUs than
6450 abbrev tables. Sort by abbrev table to reduce the number of times we
6451 read each abbrev table in.
6452 Alternatives are to punt or to maintain a cache of abbrev tables.
6453 This is simpler and efficient enough for now.
6455 Later we group TUs by their DW_AT_stmt_list value (as this defines the
6456 symtab to use). Typically TUs with the same abbrev offset have the same
6457 stmt_list value too so in practice this should work well.
6459 The basic algorithm here is:
6461 sort TUs by abbrev table
6462 for each TU with same abbrev table:
6463 read abbrev table if first user
6464 read TU top level DIE
6465 [IWBN if DWO skeletons had DW_AT_stmt_list]
6468 if (dwarf_read_debug
)
6469 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
6471 /* Sort in a separate table to maintain the order of all_type_units
6472 for .gdb_index: TU indices directly index all_type_units. */
6473 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
6474 dwarf2_per_objfile
->n_type_units
);
6475 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6477 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
6479 sorted_by_abbrev
[i
].sig_type
= sig_type
;
6480 sorted_by_abbrev
[i
].abbrev_offset
=
6481 read_abbrev_offset (sig_type
->per_cu
.section
,
6482 sig_type
->per_cu
.sect_off
);
6484 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
6485 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
6486 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
6488 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
6489 abbrev_table
= NULL
;
6490 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
6492 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
6494 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
6496 /* Switch to the next abbrev table if necessary. */
6497 if (abbrev_table
== NULL
6498 || tu
->abbrev_offset
!= abbrev_offset
)
6500 if (abbrev_table
!= NULL
)
6502 abbrev_table_free (abbrev_table
);
6503 /* Reset to NULL in case abbrev_table_read_table throws
6504 an error: abbrev_table_free_cleanup will get called. */
6505 abbrev_table
= NULL
;
6507 abbrev_offset
= tu
->abbrev_offset
;
6509 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
6511 ++tu_stats
->nr_uniq_abbrev_tables
;
6514 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
6515 build_type_psymtabs_reader
, NULL
);
6518 do_cleanups (cleanups
);
6521 /* Print collected type unit statistics. */
6524 print_tu_stats (void)
6526 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
6528 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
6529 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
6530 dwarf2_per_objfile
->n_type_units
);
6531 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
6532 tu_stats
->nr_uniq_abbrev_tables
);
6533 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
6534 tu_stats
->nr_symtabs
);
6535 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
6536 tu_stats
->nr_symtab_sharers
);
6537 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
6538 tu_stats
->nr_stmt_less_type_units
);
6539 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
6540 tu_stats
->nr_all_type_units_reallocs
);
6543 /* Traversal function for build_type_psymtabs. */
6546 build_type_psymtab_dependencies (void **slot
, void *info
)
6548 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6549 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
6550 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
6551 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6552 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
6553 struct signatured_type
*iter
;
6556 gdb_assert (len
> 0);
6557 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
6559 pst
->number_of_dependencies
= len
;
6561 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
6563 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
6566 gdb_assert (iter
->per_cu
.is_debug_types
);
6567 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
6568 iter
->type_unit_group
= tu_group
;
6571 VEC_free (sig_type_ptr
, tu_group
->tus
);
6576 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
6577 Build partial symbol tables for the .debug_types comp-units. */
6580 build_type_psymtabs (struct objfile
*objfile
)
6582 if (! create_all_type_units (objfile
))
6585 build_type_psymtabs_1 ();
6588 /* Traversal function for process_skeletonless_type_unit.
6589 Read a TU in a DWO file and build partial symbols for it. */
6592 process_skeletonless_type_unit (void **slot
, void *info
)
6594 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
6595 struct objfile
*objfile
= (struct objfile
*) info
;
6596 struct signatured_type find_entry
, *entry
;
6598 /* If this TU doesn't exist in the global table, add it and read it in. */
6600 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6602 dwarf2_per_objfile
->signatured_types
6603 = allocate_signatured_type_table (objfile
);
6606 find_entry
.signature
= dwo_unit
->signature
;
6607 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
6609 /* If we've already seen this type there's nothing to do. What's happening
6610 is we're doing our own version of comdat-folding here. */
6614 /* This does the job that create_all_type_units would have done for
6616 entry
= add_type_unit (dwo_unit
->signature
, slot
);
6617 fill_in_sig_entry_from_dwo_entry (objfile
, entry
, dwo_unit
);
6620 /* This does the job that build_type_psymtabs_1 would have done. */
6621 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
6622 build_type_psymtabs_reader
, NULL
);
6627 /* Traversal function for process_skeletonless_type_units. */
6630 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
6632 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
6634 if (dwo_file
->tus
!= NULL
)
6636 htab_traverse_noresize (dwo_file
->tus
,
6637 process_skeletonless_type_unit
, info
);
6643 /* Scan all TUs of DWO files, verifying we've processed them.
6644 This is needed in case a TU was emitted without its skeleton.
6645 Note: This can't be done until we know what all the DWO files are. */
6648 process_skeletonless_type_units (struct objfile
*objfile
)
6650 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
6651 if (get_dwp_file () == NULL
6652 && dwarf2_per_objfile
->dwo_files
!= NULL
)
6654 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
6655 process_dwo_file_for_skeletonless_type_units
,
6660 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
6663 psymtabs_addrmap_cleanup (void *o
)
6665 struct objfile
*objfile
= (struct objfile
*) o
;
6667 objfile
->psymtabs_addrmap
= NULL
;
6670 /* Compute the 'user' field for each psymtab in OBJFILE. */
6673 set_partial_user (struct objfile
*objfile
)
6677 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6679 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6680 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6686 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
6688 /* Set the 'user' field only if it is not already set. */
6689 if (pst
->dependencies
[j
]->user
== NULL
)
6690 pst
->dependencies
[j
]->user
= pst
;
6695 /* Build the partial symbol table by doing a quick pass through the
6696 .debug_info and .debug_abbrev sections. */
6699 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
6701 struct cleanup
*back_to
, *addrmap_cleanup
;
6704 if (dwarf_read_debug
)
6706 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
6707 objfile_name (objfile
));
6710 dwarf2_per_objfile
->reading_partial_symbols
= 1;
6712 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
6714 /* Any cached compilation units will be linked by the per-objfile
6715 read_in_chain. Make sure to free them when we're done. */
6716 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
6718 build_type_psymtabs (objfile
);
6720 create_all_comp_units (objfile
);
6722 /* Create a temporary address map on a temporary obstack. We later
6723 copy this to the final obstack. */
6724 auto_obstack temp_obstack
;
6725 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
6726 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
6728 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
6730 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cutu (i
);
6732 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
6735 /* This has to wait until we read the CUs, we need the list of DWOs. */
6736 process_skeletonless_type_units (objfile
);
6738 /* Now that all TUs have been processed we can fill in the dependencies. */
6739 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
6741 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
6742 build_type_psymtab_dependencies
, NULL
);
6745 if (dwarf_read_debug
)
6748 set_partial_user (objfile
);
6750 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
6751 &objfile
->objfile_obstack
);
6752 discard_cleanups (addrmap_cleanup
);
6754 do_cleanups (back_to
);
6756 if (dwarf_read_debug
)
6757 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
6758 objfile_name (objfile
));
6761 /* die_reader_func for load_partial_comp_unit. */
6764 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
6765 const gdb_byte
*info_ptr
,
6766 struct die_info
*comp_unit_die
,
6770 struct dwarf2_cu
*cu
= reader
->cu
;
6772 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
6774 /* Check if comp unit has_children.
6775 If so, read the rest of the partial symbols from this comp unit.
6776 If not, there's no more debug_info for this comp unit. */
6778 load_partial_dies (reader
, info_ptr
, 0);
6781 /* Load the partial DIEs for a secondary CU into memory.
6782 This is also used when rereading a primary CU with load_all_dies. */
6785 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
6787 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6788 load_partial_comp_unit_reader
, NULL
);
6792 read_comp_units_from_section (struct objfile
*objfile
,
6793 struct dwarf2_section_info
*section
,
6794 struct dwarf2_section_info
*abbrev_section
,
6795 unsigned int is_dwz
,
6798 struct dwarf2_per_cu_data
***all_comp_units
)
6800 const gdb_byte
*info_ptr
;
6801 bfd
*abfd
= get_section_bfd_owner (section
);
6803 if (dwarf_read_debug
)
6804 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
6805 get_section_name (section
),
6806 get_section_file_name (section
));
6808 dwarf2_read_section (objfile
, section
);
6810 info_ptr
= section
->buffer
;
6812 while (info_ptr
< section
->buffer
+ section
->size
)
6814 struct dwarf2_per_cu_data
*this_cu
;
6816 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
6818 comp_unit_head cu_header
;
6819 read_and_check_comp_unit_head (&cu_header
, section
, abbrev_section
,
6820 info_ptr
, rcuh_kind::COMPILE
);
6822 /* Save the compilation unit for later lookup. */
6823 if (cu_header
.unit_type
!= DW_UT_type
)
6825 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
6826 struct dwarf2_per_cu_data
);
6827 memset (this_cu
, 0, sizeof (*this_cu
));
6831 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
6832 struct signatured_type
);
6833 memset (sig_type
, 0, sizeof (*sig_type
));
6834 sig_type
->signature
= cu_header
.signature
;
6835 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
6836 this_cu
= &sig_type
->per_cu
;
6838 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
6839 this_cu
->sect_off
= sect_off
;
6840 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
6841 this_cu
->is_dwz
= is_dwz
;
6842 this_cu
->objfile
= objfile
;
6843 this_cu
->section
= section
;
6845 if (*n_comp_units
== *n_allocated
)
6848 *all_comp_units
= XRESIZEVEC (struct dwarf2_per_cu_data
*,
6849 *all_comp_units
, *n_allocated
);
6851 (*all_comp_units
)[*n_comp_units
] = this_cu
;
6854 info_ptr
= info_ptr
+ this_cu
->length
;
6858 /* Create a list of all compilation units in OBJFILE.
6859 This is only done for -readnow and building partial symtabs. */
6862 create_all_comp_units (struct objfile
*objfile
)
6866 struct dwarf2_per_cu_data
**all_comp_units
;
6867 struct dwz_file
*dwz
;
6871 all_comp_units
= XNEWVEC (struct dwarf2_per_cu_data
*, n_allocated
);
6873 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
,
6874 &dwarf2_per_objfile
->abbrev
, 0,
6875 &n_allocated
, &n_comp_units
, &all_comp_units
);
6877 dwz
= dwarf2_get_dwz_file ();
6879 read_comp_units_from_section (objfile
, &dwz
->info
, &dwz
->abbrev
, 1,
6880 &n_allocated
, &n_comp_units
,
6883 dwarf2_per_objfile
->all_comp_units
= XOBNEWVEC (&objfile
->objfile_obstack
,
6884 struct dwarf2_per_cu_data
*,
6886 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
6887 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
6888 xfree (all_comp_units
);
6889 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
6892 /* Process all loaded DIEs for compilation unit CU, starting at
6893 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
6894 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
6895 DW_AT_ranges). See the comments of add_partial_subprogram on how
6896 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
6899 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
6900 CORE_ADDR
*highpc
, int set_addrmap
,
6901 struct dwarf2_cu
*cu
)
6903 struct partial_die_info
*pdi
;
6905 /* Now, march along the PDI's, descending into ones which have
6906 interesting children but skipping the children of the other ones,
6907 until we reach the end of the compilation unit. */
6913 fixup_partial_die (pdi
, cu
);
6915 /* Anonymous namespaces or modules have no name but have interesting
6916 children, so we need to look at them. Ditto for anonymous
6919 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
6920 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
6921 || pdi
->tag
== DW_TAG_imported_unit
)
6925 case DW_TAG_subprogram
:
6926 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6928 case DW_TAG_constant
:
6929 case DW_TAG_variable
:
6930 case DW_TAG_typedef
:
6931 case DW_TAG_union_type
:
6932 if (!pdi
->is_declaration
)
6934 add_partial_symbol (pdi
, cu
);
6937 case DW_TAG_class_type
:
6938 case DW_TAG_interface_type
:
6939 case DW_TAG_structure_type
:
6940 if (!pdi
->is_declaration
)
6942 add_partial_symbol (pdi
, cu
);
6944 if (cu
->language
== language_rust
&& pdi
->has_children
)
6945 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
6948 case DW_TAG_enumeration_type
:
6949 if (!pdi
->is_declaration
)
6950 add_partial_enumeration (pdi
, cu
);
6952 case DW_TAG_base_type
:
6953 case DW_TAG_subrange_type
:
6954 /* File scope base type definitions are added to the partial
6956 add_partial_symbol (pdi
, cu
);
6958 case DW_TAG_namespace
:
6959 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6962 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
6964 case DW_TAG_imported_unit
:
6966 struct dwarf2_per_cu_data
*per_cu
;
6968 /* For now we don't handle imported units in type units. */
6969 if (cu
->per_cu
->is_debug_types
)
6971 error (_("Dwarf Error: DW_TAG_imported_unit is not"
6972 " supported in type units [in module %s]"),
6973 objfile_name (cu
->objfile
));
6976 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.sect_off
,
6980 /* Go read the partial unit, if needed. */
6981 if (per_cu
->v
.psymtab
== NULL
)
6982 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
6984 VEC_safe_push (dwarf2_per_cu_ptr
,
6985 cu
->per_cu
->imported_symtabs
, per_cu
);
6988 case DW_TAG_imported_declaration
:
6989 add_partial_symbol (pdi
, cu
);
6996 /* If the die has a sibling, skip to the sibling. */
6998 pdi
= pdi
->die_sibling
;
7002 /* Functions used to compute the fully scoped name of a partial DIE.
7004 Normally, this is simple. For C++, the parent DIE's fully scoped
7005 name is concatenated with "::" and the partial DIE's name.
7006 Enumerators are an exception; they use the scope of their parent
7007 enumeration type, i.e. the name of the enumeration type is not
7008 prepended to the enumerator.
7010 There are two complexities. One is DW_AT_specification; in this
7011 case "parent" means the parent of the target of the specification,
7012 instead of the direct parent of the DIE. The other is compilers
7013 which do not emit DW_TAG_namespace; in this case we try to guess
7014 the fully qualified name of structure types from their members'
7015 linkage names. This must be done using the DIE's children rather
7016 than the children of any DW_AT_specification target. We only need
7017 to do this for structures at the top level, i.e. if the target of
7018 any DW_AT_specification (if any; otherwise the DIE itself) does not
7021 /* Compute the scope prefix associated with PDI's parent, in
7022 compilation unit CU. The result will be allocated on CU's
7023 comp_unit_obstack, or a copy of the already allocated PDI->NAME
7024 field. NULL is returned if no prefix is necessary. */
7026 partial_die_parent_scope (struct partial_die_info
*pdi
,
7027 struct dwarf2_cu
*cu
)
7029 const char *grandparent_scope
;
7030 struct partial_die_info
*parent
, *real_pdi
;
7032 /* We need to look at our parent DIE; if we have a DW_AT_specification,
7033 then this means the parent of the specification DIE. */
7036 while (real_pdi
->has_specification
)
7037 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
7038 real_pdi
->spec_is_dwz
, cu
);
7040 parent
= real_pdi
->die_parent
;
7044 if (parent
->scope_set
)
7045 return parent
->scope
;
7047 fixup_partial_die (parent
, cu
);
7049 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
7051 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
7052 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
7053 Work around this problem here. */
7054 if (cu
->language
== language_cplus
7055 && parent
->tag
== DW_TAG_namespace
7056 && strcmp (parent
->name
, "::") == 0
7057 && grandparent_scope
== NULL
)
7059 parent
->scope
= NULL
;
7060 parent
->scope_set
= 1;
7064 if (pdi
->tag
== DW_TAG_enumerator
)
7065 /* Enumerators should not get the name of the enumeration as a prefix. */
7066 parent
->scope
= grandparent_scope
;
7067 else if (parent
->tag
== DW_TAG_namespace
7068 || parent
->tag
== DW_TAG_module
7069 || parent
->tag
== DW_TAG_structure_type
7070 || parent
->tag
== DW_TAG_class_type
7071 || parent
->tag
== DW_TAG_interface_type
7072 || parent
->tag
== DW_TAG_union_type
7073 || parent
->tag
== DW_TAG_enumeration_type
)
7075 if (grandparent_scope
== NULL
)
7076 parent
->scope
= parent
->name
;
7078 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
7080 parent
->name
, 0, cu
);
7084 /* FIXME drow/2004-04-01: What should we be doing with
7085 function-local names? For partial symbols, we should probably be
7087 complaint (&symfile_complaints
,
7088 _("unhandled containing DIE tag %d for DIE at %d"),
7089 parent
->tag
, to_underlying (pdi
->sect_off
));
7090 parent
->scope
= grandparent_scope
;
7093 parent
->scope_set
= 1;
7094 return parent
->scope
;
7097 /* Return the fully scoped name associated with PDI, from compilation unit
7098 CU. The result will be allocated with malloc. */
7101 partial_die_full_name (struct partial_die_info
*pdi
,
7102 struct dwarf2_cu
*cu
)
7104 const char *parent_scope
;
7106 /* If this is a template instantiation, we can not work out the
7107 template arguments from partial DIEs. So, unfortunately, we have
7108 to go through the full DIEs. At least any work we do building
7109 types here will be reused if full symbols are loaded later. */
7110 if (pdi
->has_template_arguments
)
7112 fixup_partial_die (pdi
, cu
);
7114 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
7116 struct die_info
*die
;
7117 struct attribute attr
;
7118 struct dwarf2_cu
*ref_cu
= cu
;
7120 /* DW_FORM_ref_addr is using section offset. */
7121 attr
.name
= (enum dwarf_attribute
) 0;
7122 attr
.form
= DW_FORM_ref_addr
;
7123 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
7124 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
7126 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
7130 parent_scope
= partial_die_parent_scope (pdi
, cu
);
7131 if (parent_scope
== NULL
)
7134 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
7138 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
7140 struct objfile
*objfile
= cu
->objfile
;
7141 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7143 const char *actual_name
= NULL
;
7145 char *built_actual_name
;
7147 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7149 built_actual_name
= partial_die_full_name (pdi
, cu
);
7150 if (built_actual_name
!= NULL
)
7151 actual_name
= built_actual_name
;
7153 if (actual_name
== NULL
)
7154 actual_name
= pdi
->name
;
7158 case DW_TAG_subprogram
:
7159 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
7160 if (pdi
->is_external
|| cu
->language
== language_ada
)
7162 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
7163 of the global scope. But in Ada, we want to be able to access
7164 nested procedures globally. So all Ada subprograms are stored
7165 in the global scope. */
7166 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7167 built_actual_name
!= NULL
,
7168 VAR_DOMAIN
, LOC_BLOCK
,
7169 &objfile
->global_psymbols
,
7170 addr
, cu
->language
, objfile
);
7174 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7175 built_actual_name
!= NULL
,
7176 VAR_DOMAIN
, LOC_BLOCK
,
7177 &objfile
->static_psymbols
,
7178 addr
, cu
->language
, objfile
);
7181 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
7182 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
7184 case DW_TAG_constant
:
7186 struct psymbol_allocation_list
*list
;
7188 if (pdi
->is_external
)
7189 list
= &objfile
->global_psymbols
;
7191 list
= &objfile
->static_psymbols
;
7192 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7193 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
7194 list
, 0, cu
->language
, objfile
);
7197 case DW_TAG_variable
:
7199 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
7203 && !dwarf2_per_objfile
->has_section_at_zero
)
7205 /* A global or static variable may also have been stripped
7206 out by the linker if unused, in which case its address
7207 will be nullified; do not add such variables into partial
7208 symbol table then. */
7210 else if (pdi
->is_external
)
7213 Don't enter into the minimal symbol tables as there is
7214 a minimal symbol table entry from the ELF symbols already.
7215 Enter into partial symbol table if it has a location
7216 descriptor or a type.
7217 If the location descriptor is missing, new_symbol will create
7218 a LOC_UNRESOLVED symbol, the address of the variable will then
7219 be determined from the minimal symbol table whenever the variable
7221 The address for the partial symbol table entry is not
7222 used by GDB, but it comes in handy for debugging partial symbol
7225 if (pdi
->d
.locdesc
|| pdi
->has_type
)
7226 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7227 built_actual_name
!= NULL
,
7228 VAR_DOMAIN
, LOC_STATIC
,
7229 &objfile
->global_psymbols
,
7231 cu
->language
, objfile
);
7235 int has_loc
= pdi
->d
.locdesc
!= NULL
;
7237 /* Static Variable. Skip symbols whose value we cannot know (those
7238 without location descriptors or constant values). */
7239 if (!has_loc
&& !pdi
->has_const_value
)
7241 xfree (built_actual_name
);
7245 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7246 built_actual_name
!= NULL
,
7247 VAR_DOMAIN
, LOC_STATIC
,
7248 &objfile
->static_psymbols
,
7249 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
7250 cu
->language
, objfile
);
7253 case DW_TAG_typedef
:
7254 case DW_TAG_base_type
:
7255 case DW_TAG_subrange_type
:
7256 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7257 built_actual_name
!= NULL
,
7258 VAR_DOMAIN
, LOC_TYPEDEF
,
7259 &objfile
->static_psymbols
,
7260 0, cu
->language
, objfile
);
7262 case DW_TAG_imported_declaration
:
7263 case DW_TAG_namespace
:
7264 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7265 built_actual_name
!= NULL
,
7266 VAR_DOMAIN
, LOC_TYPEDEF
,
7267 &objfile
->global_psymbols
,
7268 0, cu
->language
, objfile
);
7271 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7272 built_actual_name
!= NULL
,
7273 MODULE_DOMAIN
, LOC_TYPEDEF
,
7274 &objfile
->global_psymbols
,
7275 0, cu
->language
, objfile
);
7277 case DW_TAG_class_type
:
7278 case DW_TAG_interface_type
:
7279 case DW_TAG_structure_type
:
7280 case DW_TAG_union_type
:
7281 case DW_TAG_enumeration_type
:
7282 /* Skip external references. The DWARF standard says in the section
7283 about "Structure, Union, and Class Type Entries": "An incomplete
7284 structure, union or class type is represented by a structure,
7285 union or class entry that does not have a byte size attribute
7286 and that has a DW_AT_declaration attribute." */
7287 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
7289 xfree (built_actual_name
);
7293 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
7294 static vs. global. */
7295 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7296 built_actual_name
!= NULL
,
7297 STRUCT_DOMAIN
, LOC_TYPEDEF
,
7298 cu
->language
== language_cplus
7299 ? &objfile
->global_psymbols
7300 : &objfile
->static_psymbols
,
7301 0, cu
->language
, objfile
);
7304 case DW_TAG_enumerator
:
7305 add_psymbol_to_list (actual_name
, strlen (actual_name
),
7306 built_actual_name
!= NULL
,
7307 VAR_DOMAIN
, LOC_CONST
,
7308 cu
->language
== language_cplus
7309 ? &objfile
->global_psymbols
7310 : &objfile
->static_psymbols
,
7311 0, cu
->language
, objfile
);
7317 xfree (built_actual_name
);
7320 /* Read a partial die corresponding to a namespace; also, add a symbol
7321 corresponding to that namespace to the symbol table. NAMESPACE is
7322 the name of the enclosing namespace. */
7325 add_partial_namespace (struct partial_die_info
*pdi
,
7326 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7327 int set_addrmap
, struct dwarf2_cu
*cu
)
7329 /* Add a symbol for the namespace. */
7331 add_partial_symbol (pdi
, cu
);
7333 /* Now scan partial symbols in that namespace. */
7335 if (pdi
->has_children
)
7336 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7339 /* Read a partial die corresponding to a Fortran module. */
7342 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
7343 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
7345 /* Add a symbol for the namespace. */
7347 add_partial_symbol (pdi
, cu
);
7349 /* Now scan partial symbols in that module. */
7351 if (pdi
->has_children
)
7352 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
7355 /* Read a partial die corresponding to a subprogram and create a partial
7356 symbol for that subprogram. When the CU language allows it, this
7357 routine also defines a partial symbol for each nested subprogram
7358 that this subprogram contains. If SET_ADDRMAP is true, record the
7359 covered ranges in the addrmap. Set *LOWPC and *HIGHPC to the lowest
7360 and highest PC values found in PDI.
7362 PDI may also be a lexical block, in which case we simply search
7363 recursively for subprograms defined inside that lexical block.
7364 Again, this is only performed when the CU language allows this
7365 type of definitions. */
7368 add_partial_subprogram (struct partial_die_info
*pdi
,
7369 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
7370 int set_addrmap
, struct dwarf2_cu
*cu
)
7372 if (pdi
->tag
== DW_TAG_subprogram
)
7374 if (pdi
->has_pc_info
)
7376 if (pdi
->lowpc
< *lowpc
)
7377 *lowpc
= pdi
->lowpc
;
7378 if (pdi
->highpc
> *highpc
)
7379 *highpc
= pdi
->highpc
;
7382 struct objfile
*objfile
= cu
->objfile
;
7383 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7388 baseaddr
= ANOFFSET (objfile
->section_offsets
,
7389 SECT_OFF_TEXT (objfile
));
7390 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7391 pdi
->lowpc
+ baseaddr
);
7392 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
7393 pdi
->highpc
+ baseaddr
);
7394 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
7395 cu
->per_cu
->v
.psymtab
);
7399 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
7401 if (!pdi
->is_declaration
)
7402 /* Ignore subprogram DIEs that do not have a name, they are
7403 illegal. Do not emit a complaint at this point, we will
7404 do so when we convert this psymtab into a symtab. */
7406 add_partial_symbol (pdi
, cu
);
7410 if (! pdi
->has_children
)
7413 if (cu
->language
== language_ada
)
7415 pdi
= pdi
->die_child
;
7418 fixup_partial_die (pdi
, cu
);
7419 if (pdi
->tag
== DW_TAG_subprogram
7420 || pdi
->tag
== DW_TAG_lexical_block
)
7421 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
7422 pdi
= pdi
->die_sibling
;
7427 /* Read a partial die corresponding to an enumeration type. */
7430 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
7431 struct dwarf2_cu
*cu
)
7433 struct partial_die_info
*pdi
;
7435 if (enum_pdi
->name
!= NULL
)
7436 add_partial_symbol (enum_pdi
, cu
);
7438 pdi
= enum_pdi
->die_child
;
7441 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
7442 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
7444 add_partial_symbol (pdi
, cu
);
7445 pdi
= pdi
->die_sibling
;
7449 /* Return the initial uleb128 in the die at INFO_PTR. */
7452 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
7454 unsigned int bytes_read
;
7456 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7459 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
7460 Return the corresponding abbrev, or NULL if the number is zero (indicating
7461 an empty DIE). In either case *BYTES_READ will be set to the length of
7462 the initial number. */
7464 static struct abbrev_info
*
7465 peek_die_abbrev (const gdb_byte
*info_ptr
, unsigned int *bytes_read
,
7466 struct dwarf2_cu
*cu
)
7468 bfd
*abfd
= cu
->objfile
->obfd
;
7469 unsigned int abbrev_number
;
7470 struct abbrev_info
*abbrev
;
7472 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
7474 if (abbrev_number
== 0)
7477 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
7480 error (_("Dwarf Error: Could not find abbrev number %d in %s"
7481 " at offset 0x%x [in module %s]"),
7482 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
7483 to_underlying (cu
->header
.sect_off
), bfd_get_filename (abfd
));
7489 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7490 Returns a pointer to the end of a series of DIEs, terminated by an empty
7491 DIE. Any children of the skipped DIEs will also be skipped. */
7493 static const gdb_byte
*
7494 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
7496 struct dwarf2_cu
*cu
= reader
->cu
;
7497 struct abbrev_info
*abbrev
;
7498 unsigned int bytes_read
;
7502 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
7504 return info_ptr
+ bytes_read
;
7506 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
7510 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
7511 INFO_PTR should point just after the initial uleb128 of a DIE, and the
7512 abbrev corresponding to that skipped uleb128 should be passed in
7513 ABBREV. Returns a pointer to this DIE's sibling, skipping any
7516 static const gdb_byte
*
7517 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
7518 struct abbrev_info
*abbrev
)
7520 unsigned int bytes_read
;
7521 struct attribute attr
;
7522 bfd
*abfd
= reader
->abfd
;
7523 struct dwarf2_cu
*cu
= reader
->cu
;
7524 const gdb_byte
*buffer
= reader
->buffer
;
7525 const gdb_byte
*buffer_end
= reader
->buffer_end
;
7526 unsigned int form
, i
;
7528 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
7530 /* The only abbrev we care about is DW_AT_sibling. */
7531 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
7533 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
7534 if (attr
.form
== DW_FORM_ref_addr
)
7535 complaint (&symfile_complaints
,
7536 _("ignoring absolute DW_AT_sibling"));
7539 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
7540 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
7542 if (sibling_ptr
< info_ptr
)
7543 complaint (&symfile_complaints
,
7544 _("DW_AT_sibling points backwards"));
7545 else if (sibling_ptr
> reader
->buffer_end
)
7546 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
7552 /* If it isn't DW_AT_sibling, skip this attribute. */
7553 form
= abbrev
->attrs
[i
].form
;
7557 case DW_FORM_ref_addr
:
7558 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
7559 and later it is offset sized. */
7560 if (cu
->header
.version
== 2)
7561 info_ptr
+= cu
->header
.addr_size
;
7563 info_ptr
+= cu
->header
.offset_size
;
7565 case DW_FORM_GNU_ref_alt
:
7566 info_ptr
+= cu
->header
.offset_size
;
7569 info_ptr
+= cu
->header
.addr_size
;
7576 case DW_FORM_flag_present
:
7577 case DW_FORM_implicit_const
:
7589 case DW_FORM_ref_sig8
:
7592 case DW_FORM_data16
:
7595 case DW_FORM_string
:
7596 read_direct_string (abfd
, info_ptr
, &bytes_read
);
7597 info_ptr
+= bytes_read
;
7599 case DW_FORM_sec_offset
:
7601 case DW_FORM_GNU_strp_alt
:
7602 info_ptr
+= cu
->header
.offset_size
;
7604 case DW_FORM_exprloc
:
7606 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7607 info_ptr
+= bytes_read
;
7609 case DW_FORM_block1
:
7610 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
7612 case DW_FORM_block2
:
7613 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
7615 case DW_FORM_block4
:
7616 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
7620 case DW_FORM_ref_udata
:
7621 case DW_FORM_GNU_addr_index
:
7622 case DW_FORM_GNU_str_index
:
7623 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
7625 case DW_FORM_indirect
:
7626 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7627 info_ptr
+= bytes_read
;
7628 /* We need to continue parsing from here, so just go back to
7630 goto skip_attribute
;
7633 error (_("Dwarf Error: Cannot handle %s "
7634 "in DWARF reader [in module %s]"),
7635 dwarf_form_name (form
),
7636 bfd_get_filename (abfd
));
7640 if (abbrev
->has_children
)
7641 return skip_children (reader
, info_ptr
);
7646 /* Locate ORIG_PDI's sibling.
7647 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
7649 static const gdb_byte
*
7650 locate_pdi_sibling (const struct die_reader_specs
*reader
,
7651 struct partial_die_info
*orig_pdi
,
7652 const gdb_byte
*info_ptr
)
7654 /* Do we know the sibling already? */
7656 if (orig_pdi
->sibling
)
7657 return orig_pdi
->sibling
;
7659 /* Are there any children to deal with? */
7661 if (!orig_pdi
->has_children
)
7664 /* Skip the children the long way. */
7666 return skip_children (reader
, info_ptr
);
7669 /* Expand this partial symbol table into a full symbol table. SELF is
7673 dwarf2_read_symtab (struct partial_symtab
*self
,
7674 struct objfile
*objfile
)
7678 warning (_("bug: psymtab for %s is already read in."),
7685 printf_filtered (_("Reading in symbols for %s..."),
7687 gdb_flush (gdb_stdout
);
7690 /* Restore our global data. */
7692 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
7693 dwarf2_objfile_data_key
);
7695 /* If this psymtab is constructed from a debug-only objfile, the
7696 has_section_at_zero flag will not necessarily be correct. We
7697 can get the correct value for this flag by looking at the data
7698 associated with the (presumably stripped) associated objfile. */
7699 if (objfile
->separate_debug_objfile_backlink
)
7701 struct dwarf2_per_objfile
*dpo_backlink
7702 = ((struct dwarf2_per_objfile
*)
7703 objfile_data (objfile
->separate_debug_objfile_backlink
,
7704 dwarf2_objfile_data_key
));
7706 dwarf2_per_objfile
->has_section_at_zero
7707 = dpo_backlink
->has_section_at_zero
;
7710 dwarf2_per_objfile
->reading_partial_symbols
= 0;
7712 psymtab_to_symtab_1 (self
);
7714 /* Finish up the debug error message. */
7716 printf_filtered (_("done.\n"));
7719 process_cu_includes ();
7722 /* Reading in full CUs. */
7724 /* Add PER_CU to the queue. */
7727 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
7728 enum language pretend_language
)
7730 struct dwarf2_queue_item
*item
;
7733 item
= XNEW (struct dwarf2_queue_item
);
7734 item
->per_cu
= per_cu
;
7735 item
->pretend_language
= pretend_language
;
7738 if (dwarf2_queue
== NULL
)
7739 dwarf2_queue
= item
;
7741 dwarf2_queue_tail
->next
= item
;
7743 dwarf2_queue_tail
= item
;
7746 /* If PER_CU is not yet queued, add it to the queue.
7747 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
7749 The result is non-zero if PER_CU was queued, otherwise the result is zero
7750 meaning either PER_CU is already queued or it is already loaded.
7752 N.B. There is an invariant here that if a CU is queued then it is loaded.
7753 The caller is required to load PER_CU if we return non-zero. */
7756 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
7757 struct dwarf2_per_cu_data
*per_cu
,
7758 enum language pretend_language
)
7760 /* We may arrive here during partial symbol reading, if we need full
7761 DIEs to process an unusual case (e.g. template arguments). Do
7762 not queue PER_CU, just tell our caller to load its DIEs. */
7763 if (dwarf2_per_objfile
->reading_partial_symbols
)
7765 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
7770 /* Mark the dependence relation so that we don't flush PER_CU
7772 if (dependent_cu
!= NULL
)
7773 dwarf2_add_dependence (dependent_cu
, per_cu
);
7775 /* If it's already on the queue, we have nothing to do. */
7779 /* If the compilation unit is already loaded, just mark it as
7781 if (per_cu
->cu
!= NULL
)
7783 per_cu
->cu
->last_used
= 0;
7787 /* Add it to the queue. */
7788 queue_comp_unit (per_cu
, pretend_language
);
7793 /* Process the queue. */
7796 process_queue (void)
7798 struct dwarf2_queue_item
*item
, *next_item
;
7800 if (dwarf_read_debug
)
7802 fprintf_unfiltered (gdb_stdlog
,
7803 "Expanding one or more symtabs of objfile %s ...\n",
7804 objfile_name (dwarf2_per_objfile
->objfile
));
7807 /* The queue starts out with one item, but following a DIE reference
7808 may load a new CU, adding it to the end of the queue. */
7809 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
7811 if ((dwarf2_per_objfile
->using_index
7812 ? !item
->per_cu
->v
.quick
->compunit_symtab
7813 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
7814 /* Skip dummy CUs. */
7815 && item
->per_cu
->cu
!= NULL
)
7817 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
7818 unsigned int debug_print_threshold
;
7821 if (per_cu
->is_debug_types
)
7823 struct signatured_type
*sig_type
=
7824 (struct signatured_type
*) per_cu
;
7826 sprintf (buf
, "TU %s at offset 0x%x",
7827 hex_string (sig_type
->signature
),
7828 to_underlying (per_cu
->sect_off
));
7829 /* There can be 100s of TUs.
7830 Only print them in verbose mode. */
7831 debug_print_threshold
= 2;
7835 sprintf (buf
, "CU at offset 0x%x",
7836 to_underlying (per_cu
->sect_off
));
7837 debug_print_threshold
= 1;
7840 if (dwarf_read_debug
>= debug_print_threshold
)
7841 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
7843 if (per_cu
->is_debug_types
)
7844 process_full_type_unit (per_cu
, item
->pretend_language
);
7846 process_full_comp_unit (per_cu
, item
->pretend_language
);
7848 if (dwarf_read_debug
>= debug_print_threshold
)
7849 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
7852 item
->per_cu
->queued
= 0;
7853 next_item
= item
->next
;
7857 dwarf2_queue_tail
= NULL
;
7859 if (dwarf_read_debug
)
7861 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
7862 objfile_name (dwarf2_per_objfile
->objfile
));
7866 /* Free all allocated queue entries. This function only releases anything if
7867 an error was thrown; if the queue was processed then it would have been
7868 freed as we went along. */
7871 dwarf2_release_queue (void *dummy
)
7873 struct dwarf2_queue_item
*item
, *last
;
7875 item
= dwarf2_queue
;
7878 /* Anything still marked queued is likely to be in an
7879 inconsistent state, so discard it. */
7880 if (item
->per_cu
->queued
)
7882 if (item
->per_cu
->cu
!= NULL
)
7883 free_one_cached_comp_unit (item
->per_cu
);
7884 item
->per_cu
->queued
= 0;
7892 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
7895 /* Read in full symbols for PST, and anything it depends on. */
7898 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
7900 struct dwarf2_per_cu_data
*per_cu
;
7906 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
7907 if (!pst
->dependencies
[i
]->readin
7908 && pst
->dependencies
[i
]->user
== NULL
)
7910 /* Inform about additional files that need to be read in. */
7913 /* FIXME: i18n: Need to make this a single string. */
7914 fputs_filtered (" ", gdb_stdout
);
7916 fputs_filtered ("and ", gdb_stdout
);
7918 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
7919 wrap_here (""); /* Flush output. */
7920 gdb_flush (gdb_stdout
);
7922 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
7925 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
7929 /* It's an include file, no symbols to read for it.
7930 Everything is in the parent symtab. */
7935 dw2_do_instantiate_symtab (per_cu
);
7938 /* Trivial hash function for die_info: the hash value of a DIE
7939 is its offset in .debug_info for this objfile. */
7942 die_hash (const void *item
)
7944 const struct die_info
*die
= (const struct die_info
*) item
;
7946 return to_underlying (die
->sect_off
);
7949 /* Trivial comparison function for die_info structures: two DIEs
7950 are equal if they have the same offset. */
7953 die_eq (const void *item_lhs
, const void *item_rhs
)
7955 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
7956 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
7958 return die_lhs
->sect_off
== die_rhs
->sect_off
;
7961 /* die_reader_func for load_full_comp_unit.
7962 This is identical to read_signatured_type_reader,
7963 but is kept separate for now. */
7966 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
7967 const gdb_byte
*info_ptr
,
7968 struct die_info
*comp_unit_die
,
7972 struct dwarf2_cu
*cu
= reader
->cu
;
7973 enum language
*language_ptr
= (enum language
*) data
;
7975 gdb_assert (cu
->die_hash
== NULL
);
7977 htab_create_alloc_ex (cu
->header
.length
/ 12,
7981 &cu
->comp_unit_obstack
,
7982 hashtab_obstack_allocate
,
7983 dummy_obstack_deallocate
);
7986 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
7987 &info_ptr
, comp_unit_die
);
7988 cu
->dies
= comp_unit_die
;
7989 /* comp_unit_die is not stored in die_hash, no need. */
7991 /* We try not to read any attributes in this function, because not
7992 all CUs needed for references have been loaded yet, and symbol
7993 table processing isn't initialized. But we have to set the CU language,
7994 or we won't be able to build types correctly.
7995 Similarly, if we do not read the producer, we can not apply
7996 producer-specific interpretation. */
7997 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
8000 /* Load the DIEs associated with PER_CU into memory. */
8003 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8004 enum language pretend_language
)
8006 gdb_assert (! this_cu
->is_debug_types
);
8008 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8009 load_full_comp_unit_reader
, &pretend_language
);
8012 /* Add a DIE to the delayed physname list. */
8015 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
8016 const char *name
, struct die_info
*die
,
8017 struct dwarf2_cu
*cu
)
8019 struct delayed_method_info mi
;
8021 mi
.fnfield_index
= fnfield_index
;
8025 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
8028 /* A cleanup for freeing the delayed method list. */
8031 free_delayed_list (void *ptr
)
8033 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
8034 if (cu
->method_list
!= NULL
)
8036 VEC_free (delayed_method_info
, cu
->method_list
);
8037 cu
->method_list
= NULL
;
8041 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
8042 "const" / "volatile". If so, decrements LEN by the length of the
8043 modifier and return true. Otherwise return false. */
8047 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
8049 size_t mod_len
= sizeof (mod
) - 1;
8050 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
8058 /* Compute the physnames of any methods on the CU's method list.
8060 The computation of method physnames is delayed in order to avoid the
8061 (bad) condition that one of the method's formal parameters is of an as yet
8065 compute_delayed_physnames (struct dwarf2_cu
*cu
)
8068 struct delayed_method_info
*mi
;
8070 /* Only C++ delays computing physnames. */
8071 if (VEC_empty (delayed_method_info
, cu
->method_list
))
8073 gdb_assert (cu
->language
== language_cplus
);
8075 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
8077 const char *physname
;
8078 struct fn_fieldlist
*fn_flp
8079 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
8080 physname
= dwarf2_physname (mi
->name
, mi
->die
, cu
);
8081 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
->index
)
8082 = physname
? physname
: "";
8084 /* Since there's no tag to indicate whether a method is a
8085 const/volatile overload, extract that information out of the
8087 if (physname
!= NULL
)
8089 size_t len
= strlen (physname
);
8093 if (physname
[len
] == ')') /* shortcut */
8095 else if (check_modifier (physname
, len
, " const"))
8096 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
->index
) = 1;
8097 else if (check_modifier (physname
, len
, " volatile"))
8098 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
->index
) = 1;
8106 /* Go objects should be embedded in a DW_TAG_module DIE,
8107 and it's not clear if/how imported objects will appear.
8108 To keep Go support simple until that's worked out,
8109 go back through what we've read and create something usable.
8110 We could do this while processing each DIE, and feels kinda cleaner,
8111 but that way is more invasive.
8112 This is to, for example, allow the user to type "p var" or "b main"
8113 without having to specify the package name, and allow lookups
8114 of module.object to work in contexts that use the expression
8118 fixup_go_packaging (struct dwarf2_cu
*cu
)
8120 char *package_name
= NULL
;
8121 struct pending
*list
;
8124 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
8126 for (i
= 0; i
< list
->nsyms
; ++i
)
8128 struct symbol
*sym
= list
->symbol
[i
];
8130 if (SYMBOL_LANGUAGE (sym
) == language_go
8131 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
8133 char *this_package_name
= go_symbol_package_name (sym
);
8135 if (this_package_name
== NULL
)
8137 if (package_name
== NULL
)
8138 package_name
= this_package_name
;
8141 if (strcmp (package_name
, this_package_name
) != 0)
8142 complaint (&symfile_complaints
,
8143 _("Symtab %s has objects from two different Go packages: %s and %s"),
8144 (symbol_symtab (sym
) != NULL
8145 ? symtab_to_filename_for_display
8146 (symbol_symtab (sym
))
8147 : objfile_name (cu
->objfile
)),
8148 this_package_name
, package_name
);
8149 xfree (this_package_name
);
8155 if (package_name
!= NULL
)
8157 struct objfile
*objfile
= cu
->objfile
;
8158 const char *saved_package_name
8159 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8161 strlen (package_name
));
8162 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
8163 saved_package_name
);
8166 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8168 sym
= allocate_symbol (objfile
);
8169 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
8170 SYMBOL_SET_NAMES (sym
, saved_package_name
,
8171 strlen (saved_package_name
), 0, objfile
);
8172 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
8173 e.g., "main" finds the "main" module and not C's main(). */
8174 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8175 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
8176 SYMBOL_TYPE (sym
) = type
;
8178 add_symbol_to_list (sym
, &global_symbols
);
8180 xfree (package_name
);
8184 /* Return the symtab for PER_CU. This works properly regardless of
8185 whether we're using the index or psymtabs. */
8187 static struct compunit_symtab
*
8188 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
8190 return (dwarf2_per_objfile
->using_index
8191 ? per_cu
->v
.quick
->compunit_symtab
8192 : per_cu
->v
.psymtab
->compunit_symtab
);
8195 /* A helper function for computing the list of all symbol tables
8196 included by PER_CU. */
8199 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
8200 htab_t all_children
, htab_t all_type_symtabs
,
8201 struct dwarf2_per_cu_data
*per_cu
,
8202 struct compunit_symtab
*immediate_parent
)
8206 struct compunit_symtab
*cust
;
8207 struct dwarf2_per_cu_data
*iter
;
8209 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
8212 /* This inclusion and its children have been processed. */
8217 /* Only add a CU if it has a symbol table. */
8218 cust
= get_compunit_symtab (per_cu
);
8221 /* If this is a type unit only add its symbol table if we haven't
8222 seen it yet (type unit per_cu's can share symtabs). */
8223 if (per_cu
->is_debug_types
)
8225 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
8229 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
8230 if (cust
->user
== NULL
)
8231 cust
->user
= immediate_parent
;
8236 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
8237 if (cust
->user
== NULL
)
8238 cust
->user
= immediate_parent
;
8243 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
8246 recursively_compute_inclusions (result
, all_children
,
8247 all_type_symtabs
, iter
, cust
);
8251 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
8255 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
8257 gdb_assert (! per_cu
->is_debug_types
);
8259 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
8262 struct dwarf2_per_cu_data
*per_cu_iter
;
8263 struct compunit_symtab
*compunit_symtab_iter
;
8264 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
8265 htab_t all_children
, all_type_symtabs
;
8266 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
8268 /* If we don't have a symtab, we can just skip this case. */
8272 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
8273 NULL
, xcalloc
, xfree
);
8274 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
8275 NULL
, xcalloc
, xfree
);
8278 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
8282 recursively_compute_inclusions (&result_symtabs
, all_children
,
8283 all_type_symtabs
, per_cu_iter
,
8287 /* Now we have a transitive closure of all the included symtabs. */
8288 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
8290 = XOBNEWVEC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
8291 struct compunit_symtab
*, len
+ 1);
8293 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
8294 compunit_symtab_iter
);
8296 cust
->includes
[ix
] = compunit_symtab_iter
;
8297 cust
->includes
[len
] = NULL
;
8299 VEC_free (compunit_symtab_ptr
, result_symtabs
);
8300 htab_delete (all_children
);
8301 htab_delete (all_type_symtabs
);
8305 /* Compute the 'includes' field for the symtabs of all the CUs we just
8309 process_cu_includes (void)
8312 struct dwarf2_per_cu_data
*iter
;
8315 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
8319 if (! iter
->is_debug_types
)
8320 compute_compunit_symtab_includes (iter
);
8323 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
8326 /* Generate full symbol information for PER_CU, whose DIEs have
8327 already been loaded into memory. */
8330 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8331 enum language pretend_language
)
8333 struct dwarf2_cu
*cu
= per_cu
->cu
;
8334 struct objfile
*objfile
= per_cu
->objfile
;
8335 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8336 CORE_ADDR lowpc
, highpc
;
8337 struct compunit_symtab
*cust
;
8338 struct cleanup
*back_to
, *delayed_list_cleanup
;
8340 struct block
*static_block
;
8343 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8346 back_to
= make_cleanup (really_free_pendings
, NULL
);
8347 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8349 cu
->list_in_scope
= &file_symbols
;
8351 cu
->language
= pretend_language
;
8352 cu
->language_defn
= language_def (cu
->language
);
8354 /* Do line number decoding in read_file_scope () */
8355 process_die (cu
->dies
, cu
);
8357 /* For now fudge the Go package. */
8358 if (cu
->language
== language_go
)
8359 fixup_go_packaging (cu
);
8361 /* Now that we have processed all the DIEs in the CU, all the types
8362 should be complete, and it should now be safe to compute all of the
8364 compute_delayed_physnames (cu
);
8365 do_cleanups (delayed_list_cleanup
);
8367 /* Some compilers don't define a DW_AT_high_pc attribute for the
8368 compilation unit. If the DW_AT_high_pc is missing, synthesize
8369 it, by scanning the DIE's below the compilation unit. */
8370 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
8372 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
8373 static_block
= end_symtab_get_static_block (addr
, 0, 1);
8375 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
8376 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
8377 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
8378 addrmap to help ensure it has an accurate map of pc values belonging to
8380 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
8382 cust
= end_symtab_from_static_block (static_block
,
8383 SECT_OFF_TEXT (objfile
), 0);
8387 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
8389 /* Set symtab language to language from DW_AT_language. If the
8390 compilation is from a C file generated by language preprocessors, do
8391 not set the language if it was already deduced by start_subfile. */
8392 if (!(cu
->language
== language_c
8393 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
8394 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8396 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
8397 produce DW_AT_location with location lists but it can be possibly
8398 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
8399 there were bugs in prologue debug info, fixed later in GCC-4.5
8400 by "unwind info for epilogues" patch (which is not directly related).
8402 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
8403 needed, it would be wrong due to missing DW_AT_producer there.
8405 Still one can confuse GDB by using non-standard GCC compilation
8406 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
8408 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
8409 cust
->locations_valid
= 1;
8411 if (gcc_4_minor
>= 5)
8412 cust
->epilogue_unwind_valid
= 1;
8414 cust
->call_site_htab
= cu
->call_site_htab
;
8417 if (dwarf2_per_objfile
->using_index
)
8418 per_cu
->v
.quick
->compunit_symtab
= cust
;
8421 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8422 pst
->compunit_symtab
= cust
;
8426 /* Push it for inclusion processing later. */
8427 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
8429 do_cleanups (back_to
);
8432 /* Generate full symbol information for type unit PER_CU, whose DIEs have
8433 already been loaded into memory. */
8436 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
8437 enum language pretend_language
)
8439 struct dwarf2_cu
*cu
= per_cu
->cu
;
8440 struct objfile
*objfile
= per_cu
->objfile
;
8441 struct compunit_symtab
*cust
;
8442 struct cleanup
*back_to
, *delayed_list_cleanup
;
8443 struct signatured_type
*sig_type
;
8445 gdb_assert (per_cu
->is_debug_types
);
8446 sig_type
= (struct signatured_type
*) per_cu
;
8449 back_to
= make_cleanup (really_free_pendings
, NULL
);
8450 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
8452 cu
->list_in_scope
= &file_symbols
;
8454 cu
->language
= pretend_language
;
8455 cu
->language_defn
= language_def (cu
->language
);
8457 /* The symbol tables are set up in read_type_unit_scope. */
8458 process_die (cu
->dies
, cu
);
8460 /* For now fudge the Go package. */
8461 if (cu
->language
== language_go
)
8462 fixup_go_packaging (cu
);
8464 /* Now that we have processed all the DIEs in the CU, all the types
8465 should be complete, and it should now be safe to compute all of the
8467 compute_delayed_physnames (cu
);
8468 do_cleanups (delayed_list_cleanup
);
8470 /* TUs share symbol tables.
8471 If this is the first TU to use this symtab, complete the construction
8472 of it with end_expandable_symtab. Otherwise, complete the addition of
8473 this TU's symbols to the existing symtab. */
8474 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
8476 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
8477 sig_type
->type_unit_group
->compunit_symtab
= cust
;
8481 /* Set symtab language to language from DW_AT_language. If the
8482 compilation is from a C file generated by language preprocessors,
8483 do not set the language if it was already deduced by
8485 if (!(cu
->language
== language_c
8486 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
8487 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
8492 augment_type_symtab ();
8493 cust
= sig_type
->type_unit_group
->compunit_symtab
;
8496 if (dwarf2_per_objfile
->using_index
)
8497 per_cu
->v
.quick
->compunit_symtab
= cust
;
8500 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8501 pst
->compunit_symtab
= cust
;
8505 do_cleanups (back_to
);
8508 /* Process an imported unit DIE. */
8511 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8513 struct attribute
*attr
;
8515 /* For now we don't handle imported units in type units. */
8516 if (cu
->per_cu
->is_debug_types
)
8518 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8519 " supported in type units [in module %s]"),
8520 objfile_name (cu
->objfile
));
8523 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
8526 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
8527 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
8528 dwarf2_per_cu_data
*per_cu
8529 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, cu
->objfile
);
8531 /* If necessary, add it to the queue and load its DIEs. */
8532 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
8533 load_full_comp_unit (per_cu
, cu
->language
);
8535 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8540 /* RAII object that represents a process_die scope: i.e.,
8541 starts/finishes processing a DIE. */
8542 class process_die_scope
8545 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
8546 : m_die (die
), m_cu (cu
)
8548 /* We should only be processing DIEs not already in process. */
8549 gdb_assert (!m_die
->in_process
);
8550 m_die
->in_process
= true;
8553 ~process_die_scope ()
8555 m_die
->in_process
= false;
8557 /* If we're done processing the DIE for the CU that owns the line
8558 header, we don't need the line header anymore. */
8559 if (m_cu
->line_header_die_owner
== m_die
)
8561 delete m_cu
->line_header
;
8562 m_cu
->line_header
= NULL
;
8563 m_cu
->line_header_die_owner
= NULL
;
8572 /* Process a die and its children. */
8575 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8577 process_die_scope
scope (die
, cu
);
8581 case DW_TAG_padding
:
8583 case DW_TAG_compile_unit
:
8584 case DW_TAG_partial_unit
:
8585 read_file_scope (die
, cu
);
8587 case DW_TAG_type_unit
:
8588 read_type_unit_scope (die
, cu
);
8590 case DW_TAG_subprogram
:
8591 case DW_TAG_inlined_subroutine
:
8592 read_func_scope (die
, cu
);
8594 case DW_TAG_lexical_block
:
8595 case DW_TAG_try_block
:
8596 case DW_TAG_catch_block
:
8597 read_lexical_block_scope (die
, cu
);
8599 case DW_TAG_call_site
:
8600 case DW_TAG_GNU_call_site
:
8601 read_call_site_scope (die
, cu
);
8603 case DW_TAG_class_type
:
8604 case DW_TAG_interface_type
:
8605 case DW_TAG_structure_type
:
8606 case DW_TAG_union_type
:
8607 process_structure_scope (die
, cu
);
8609 case DW_TAG_enumeration_type
:
8610 process_enumeration_scope (die
, cu
);
8613 /* These dies have a type, but processing them does not create
8614 a symbol or recurse to process the children. Therefore we can
8615 read them on-demand through read_type_die. */
8616 case DW_TAG_subroutine_type
:
8617 case DW_TAG_set_type
:
8618 case DW_TAG_array_type
:
8619 case DW_TAG_pointer_type
:
8620 case DW_TAG_ptr_to_member_type
:
8621 case DW_TAG_reference_type
:
8622 case DW_TAG_rvalue_reference_type
:
8623 case DW_TAG_string_type
:
8626 case DW_TAG_base_type
:
8627 case DW_TAG_subrange_type
:
8628 case DW_TAG_typedef
:
8629 /* Add a typedef symbol for the type definition, if it has a
8631 new_symbol (die
, read_type_die (die
, cu
), cu
);
8633 case DW_TAG_common_block
:
8634 read_common_block (die
, cu
);
8636 case DW_TAG_common_inclusion
:
8638 case DW_TAG_namespace
:
8639 cu
->processing_has_namespace_info
= 1;
8640 read_namespace (die
, cu
);
8643 cu
->processing_has_namespace_info
= 1;
8644 read_module (die
, cu
);
8646 case DW_TAG_imported_declaration
:
8647 cu
->processing_has_namespace_info
= 1;
8648 if (read_namespace_alias (die
, cu
))
8650 /* The declaration is not a global namespace alias: fall through. */
8651 case DW_TAG_imported_module
:
8652 cu
->processing_has_namespace_info
= 1;
8653 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
8654 || cu
->language
!= language_fortran
))
8655 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
8656 dwarf_tag_name (die
->tag
));
8657 read_import_statement (die
, cu
);
8660 case DW_TAG_imported_unit
:
8661 process_imported_unit_die (die
, cu
);
8665 new_symbol (die
, NULL
, cu
);
8670 /* DWARF name computation. */
8672 /* A helper function for dwarf2_compute_name which determines whether DIE
8673 needs to have the name of the scope prepended to the name listed in the
8677 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8679 struct attribute
*attr
;
8683 case DW_TAG_namespace
:
8684 case DW_TAG_typedef
:
8685 case DW_TAG_class_type
:
8686 case DW_TAG_interface_type
:
8687 case DW_TAG_structure_type
:
8688 case DW_TAG_union_type
:
8689 case DW_TAG_enumeration_type
:
8690 case DW_TAG_enumerator
:
8691 case DW_TAG_subprogram
:
8692 case DW_TAG_inlined_subroutine
:
8694 case DW_TAG_imported_declaration
:
8697 case DW_TAG_variable
:
8698 case DW_TAG_constant
:
8699 /* We only need to prefix "globally" visible variables. These include
8700 any variable marked with DW_AT_external or any variable that
8701 lives in a namespace. [Variables in anonymous namespaces
8702 require prefixing, but they are not DW_AT_external.] */
8704 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
8706 struct dwarf2_cu
*spec_cu
= cu
;
8708 return die_needs_namespace (die_specification (die
, &spec_cu
),
8712 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8713 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
8714 && die
->parent
->tag
!= DW_TAG_module
)
8716 /* A variable in a lexical block of some kind does not need a
8717 namespace, even though in C++ such variables may be external
8718 and have a mangled name. */
8719 if (die
->parent
->tag
== DW_TAG_lexical_block
8720 || die
->parent
->tag
== DW_TAG_try_block
8721 || die
->parent
->tag
== DW_TAG_catch_block
8722 || die
->parent
->tag
== DW_TAG_subprogram
)
8731 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
8732 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
8733 defined for the given DIE. */
8735 static struct attribute
*
8736 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
8738 struct attribute
*attr
;
8740 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
8742 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8747 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
8748 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
8749 defined for the given DIE. */
8752 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8754 const char *linkage_name
;
8756 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
8757 if (linkage_name
== NULL
)
8758 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8760 return linkage_name
;
8763 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
8764 compute the physname for the object, which include a method's:
8765 - formal parameters (C++),
8766 - receiver type (Go),
8768 The term "physname" is a bit confusing.
8769 For C++, for example, it is the demangled name.
8770 For Go, for example, it's the mangled name.
8772 For Ada, return the DIE's linkage name rather than the fully qualified
8773 name. PHYSNAME is ignored..
8775 The result is allocated on the objfile_obstack and canonicalized. */
8778 dwarf2_compute_name (const char *name
,
8779 struct die_info
*die
, struct dwarf2_cu
*cu
,
8782 struct objfile
*objfile
= cu
->objfile
;
8785 name
= dwarf2_name (die
, cu
);
8787 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
8788 but otherwise compute it by typename_concat inside GDB.
8789 FIXME: Actually this is not really true, or at least not always true.
8790 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
8791 Fortran names because there is no mangling standard. So new_symbol_full
8792 will set the demangled name to the result of dwarf2_full_name, and it is
8793 the demangled name that GDB uses if it exists. */
8794 if (cu
->language
== language_ada
8795 || (cu
->language
== language_fortran
&& physname
))
8797 /* For Ada unit, we prefer the linkage name over the name, as
8798 the former contains the exported name, which the user expects
8799 to be able to reference. Ideally, we want the user to be able
8800 to reference this entity using either natural or linkage name,
8801 but we haven't started looking at this enhancement yet. */
8802 const char *linkage_name
= dw2_linkage_name (die
, cu
);
8804 if (linkage_name
!= NULL
)
8805 return linkage_name
;
8808 /* These are the only languages we know how to qualify names in. */
8810 && (cu
->language
== language_cplus
8811 || cu
->language
== language_fortran
|| cu
->language
== language_d
8812 || cu
->language
== language_rust
))
8814 if (die_needs_namespace (die
, cu
))
8818 const char *canonical_name
= NULL
;
8822 prefix
= determine_prefix (die
, cu
);
8823 if (*prefix
!= '\0')
8825 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
8828 buf
.puts (prefixed_name
);
8829 xfree (prefixed_name
);
8834 /* Template parameters may be specified in the DIE's DW_AT_name, or
8835 as children with DW_TAG_template_type_param or
8836 DW_TAG_value_type_param. If the latter, add them to the name
8837 here. If the name already has template parameters, then
8838 skip this step; some versions of GCC emit both, and
8839 it is more efficient to use the pre-computed name.
8841 Something to keep in mind about this process: it is very
8842 unlikely, or in some cases downright impossible, to produce
8843 something that will match the mangled name of a function.
8844 If the definition of the function has the same debug info,
8845 we should be able to match up with it anyway. But fallbacks
8846 using the minimal symbol, for instance to find a method
8847 implemented in a stripped copy of libstdc++, will not work.
8848 If we do not have debug info for the definition, we will have to
8849 match them up some other way.
8851 When we do name matching there is a related problem with function
8852 templates; two instantiated function templates are allowed to
8853 differ only by their return types, which we do not add here. */
8855 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
8857 struct attribute
*attr
;
8858 struct die_info
*child
;
8861 die
->building_fullname
= 1;
8863 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
8867 const gdb_byte
*bytes
;
8868 struct dwarf2_locexpr_baton
*baton
;
8871 if (child
->tag
!= DW_TAG_template_type_param
8872 && child
->tag
!= DW_TAG_template_value_param
)
8883 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
8886 complaint (&symfile_complaints
,
8887 _("template parameter missing DW_AT_type"));
8888 buf
.puts ("UNKNOWN_TYPE");
8891 type
= die_type (child
, cu
);
8893 if (child
->tag
== DW_TAG_template_type_param
)
8895 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
8899 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
8902 complaint (&symfile_complaints
,
8903 _("template parameter missing "
8904 "DW_AT_const_value"));
8905 buf
.puts ("UNKNOWN_VALUE");
8909 dwarf2_const_value_attr (attr
, type
, name
,
8910 &cu
->comp_unit_obstack
, cu
,
8911 &value
, &bytes
, &baton
);
8913 if (TYPE_NOSIGN (type
))
8914 /* GDB prints characters as NUMBER 'CHAR'. If that's
8915 changed, this can use value_print instead. */
8916 c_printchar (value
, type
, &buf
);
8919 struct value_print_options opts
;
8922 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
8926 else if (bytes
!= NULL
)
8928 v
= allocate_value (type
);
8929 memcpy (value_contents_writeable (v
), bytes
,
8930 TYPE_LENGTH (type
));
8933 v
= value_from_longest (type
, value
);
8935 /* Specify decimal so that we do not depend on
8937 get_formatted_print_options (&opts
, 'd');
8939 value_print (v
, &buf
, &opts
);
8945 die
->building_fullname
= 0;
8949 /* Close the argument list, with a space if necessary
8950 (nested templates). */
8951 if (!buf
.empty () && buf
.string ().back () == '>')
8958 /* For C++ methods, append formal parameter type
8959 information, if PHYSNAME. */
8961 if (physname
&& die
->tag
== DW_TAG_subprogram
8962 && cu
->language
== language_cplus
)
8964 struct type
*type
= read_type_die (die
, cu
);
8966 c_type_print_args (type
, &buf
, 1, cu
->language
,
8967 &type_print_raw_options
);
8969 if (cu
->language
== language_cplus
)
8971 /* Assume that an artificial first parameter is
8972 "this", but do not crash if it is not. RealView
8973 marks unnamed (and thus unused) parameters as
8974 artificial; there is no way to differentiate
8976 if (TYPE_NFIELDS (type
) > 0
8977 && TYPE_FIELD_ARTIFICIAL (type
, 0)
8978 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
8979 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
8981 buf
.puts (" const");
8985 const std::string
&intermediate_name
= buf
.string ();
8987 if (cu
->language
== language_cplus
)
8989 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
8990 &objfile
->per_bfd
->storage_obstack
);
8992 /* If we only computed INTERMEDIATE_NAME, or if
8993 INTERMEDIATE_NAME is already canonical, then we need to
8994 copy it to the appropriate obstack. */
8995 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
8996 name
= ((const char *)
8997 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
8998 intermediate_name
.c_str (),
8999 intermediate_name
.length ()));
9001 name
= canonical_name
;
9008 /* Return the fully qualified name of DIE, based on its DW_AT_name.
9009 If scope qualifiers are appropriate they will be added. The result
9010 will be allocated on the storage_obstack, or NULL if the DIE does
9011 not have a name. NAME may either be from a previous call to
9012 dwarf2_name or NULL.
9014 The output string will be canonicalized (if C++). */
9017 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9019 return dwarf2_compute_name (name
, die
, cu
, 0);
9022 /* Construct a physname for the given DIE in CU. NAME may either be
9023 from a previous call to dwarf2_name or NULL. The result will be
9024 allocated on the objfile_objstack or NULL if the DIE does not have a
9027 The output string will be canonicalized (if C++). */
9030 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
9032 struct objfile
*objfile
= cu
->objfile
;
9033 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
9034 struct cleanup
*back_to
;
9037 /* In this case dwarf2_compute_name is just a shortcut not building anything
9039 if (!die_needs_namespace (die
, cu
))
9040 return dwarf2_compute_name (name
, die
, cu
, 1);
9042 back_to
= make_cleanup (null_cleanup
, NULL
);
9044 mangled
= dw2_linkage_name (die
, cu
);
9046 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
9047 See https://github.com/rust-lang/rust/issues/32925. */
9048 if (cu
->language
== language_rust
&& mangled
!= NULL
9049 && strchr (mangled
, '{') != NULL
)
9052 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
9054 if (mangled
!= NULL
)
9058 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
9059 type. It is easier for GDB users to search for such functions as
9060 `name(params)' than `long name(params)'. In such case the minimal
9061 symbol names do not match the full symbol names but for template
9062 functions there is never a need to look up their definition from their
9063 declaration so the only disadvantage remains the minimal symbol
9064 variant `long name(params)' does not have the proper inferior type.
9067 if (cu
->language
== language_go
)
9069 /* This is a lie, but we already lie to the caller new_symbol_full.
9070 new_symbol_full assumes we return the mangled name.
9071 This just undoes that lie until things are cleaned up. */
9076 demangled
= gdb_demangle (mangled
,
9077 (DMGL_PARAMS
| DMGL_ANSI
| DMGL_RET_DROP
));
9081 make_cleanup (xfree
, demangled
);
9091 if (canon
== NULL
|| check_physname
)
9093 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
9095 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
9097 /* It may not mean a bug in GDB. The compiler could also
9098 compute DW_AT_linkage_name incorrectly. But in such case
9099 GDB would need to be bug-to-bug compatible. */
9101 complaint (&symfile_complaints
,
9102 _("Computed physname <%s> does not match demangled <%s> "
9103 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
9104 physname
, canon
, mangled
, to_underlying (die
->sect_off
),
9105 objfile_name (objfile
));
9107 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
9108 is available here - over computed PHYSNAME. It is safer
9109 against both buggy GDB and buggy compilers. */
9123 retval
= ((const char *)
9124 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9125 retval
, strlen (retval
)));
9127 do_cleanups (back_to
);
9131 /* Inspect DIE in CU for a namespace alias. If one exists, record
9132 a new symbol for it.
9134 Returns 1 if a namespace alias was recorded, 0 otherwise. */
9137 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
9139 struct attribute
*attr
;
9141 /* If the die does not have a name, this is not a namespace
9143 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9147 struct die_info
*d
= die
;
9148 struct dwarf2_cu
*imported_cu
= cu
;
9150 /* If the compiler has nested DW_AT_imported_declaration DIEs,
9151 keep inspecting DIEs until we hit the underlying import. */
9152 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
9153 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
9155 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
9159 d
= follow_die_ref (d
, attr
, &imported_cu
);
9160 if (d
->tag
!= DW_TAG_imported_declaration
)
9164 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
9166 complaint (&symfile_complaints
,
9167 _("DIE at 0x%x has too many recursively imported "
9168 "declarations"), to_underlying (d
->sect_off
));
9175 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
9177 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
9178 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
9180 /* This declaration is a global namespace alias. Add
9181 a symbol for it whose type is the aliased namespace. */
9182 new_symbol (die
, type
, cu
);
9191 /* Return the using directives repository (global or local?) to use in the
9192 current context for LANGUAGE.
9194 For Ada, imported declarations can materialize renamings, which *may* be
9195 global. However it is impossible (for now?) in DWARF to distinguish
9196 "external" imported declarations and "static" ones. As all imported
9197 declarations seem to be static in all other languages, make them all CU-wide
9198 global only in Ada. */
9200 static struct using_direct
**
9201 using_directives (enum language language
)
9203 if (language
== language_ada
&& context_stack_depth
== 0)
9204 return &global_using_directives
;
9206 return &local_using_directives
;
9209 /* Read the import statement specified by the given die and record it. */
9212 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
9214 struct objfile
*objfile
= cu
->objfile
;
9215 struct attribute
*import_attr
;
9216 struct die_info
*imported_die
, *child_die
;
9217 struct dwarf2_cu
*imported_cu
;
9218 const char *imported_name
;
9219 const char *imported_name_prefix
;
9220 const char *canonical_name
;
9221 const char *import_alias
;
9222 const char *imported_declaration
= NULL
;
9223 const char *import_prefix
;
9224 VEC (const_char_ptr
) *excludes
= NULL
;
9225 struct cleanup
*cleanups
;
9227 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9228 if (import_attr
== NULL
)
9230 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9231 dwarf_tag_name (die
->tag
));
9236 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
9237 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9238 if (imported_name
== NULL
)
9240 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
9242 The import in the following code:
9256 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
9257 <52> DW_AT_decl_file : 1
9258 <53> DW_AT_decl_line : 6
9259 <54> DW_AT_import : <0x75>
9260 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
9262 <5b> DW_AT_decl_file : 1
9263 <5c> DW_AT_decl_line : 2
9264 <5d> DW_AT_type : <0x6e>
9266 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
9267 <76> DW_AT_byte_size : 4
9268 <77> DW_AT_encoding : 5 (signed)
9270 imports the wrong die ( 0x75 instead of 0x58 ).
9271 This case will be ignored until the gcc bug is fixed. */
9275 /* Figure out the local name after import. */
9276 import_alias
= dwarf2_name (die
, cu
);
9278 /* Figure out where the statement is being imported to. */
9279 import_prefix
= determine_prefix (die
, cu
);
9281 /* Figure out what the scope of the imported die is and prepend it
9282 to the name of the imported die. */
9283 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
9285 if (imported_die
->tag
!= DW_TAG_namespace
9286 && imported_die
->tag
!= DW_TAG_module
)
9288 imported_declaration
= imported_name
;
9289 canonical_name
= imported_name_prefix
;
9291 else if (strlen (imported_name_prefix
) > 0)
9292 canonical_name
= obconcat (&objfile
->objfile_obstack
,
9293 imported_name_prefix
,
9294 (cu
->language
== language_d
? "." : "::"),
9295 imported_name
, (char *) NULL
);
9297 canonical_name
= imported_name
;
9299 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
9301 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
9302 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
9303 child_die
= sibling_die (child_die
))
9305 /* DWARF-4: A Fortran use statement with a “rename list” may be
9306 represented by an imported module entry with an import attribute
9307 referring to the module and owned entries corresponding to those
9308 entities that are renamed as part of being imported. */
9310 if (child_die
->tag
!= DW_TAG_imported_declaration
)
9312 complaint (&symfile_complaints
,
9313 _("child DW_TAG_imported_declaration expected "
9314 "- DIE at 0x%x [in module %s]"),
9315 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
9319 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
9320 if (import_attr
== NULL
)
9322 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
9323 dwarf_tag_name (child_die
->tag
));
9328 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
9330 imported_name
= dwarf2_name (imported_die
, imported_cu
);
9331 if (imported_name
== NULL
)
9333 complaint (&symfile_complaints
,
9334 _("child DW_TAG_imported_declaration has unknown "
9335 "imported name - DIE at 0x%x [in module %s]"),
9336 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
9340 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
9342 process_die (child_die
, cu
);
9345 add_using_directive (using_directives (cu
->language
),
9349 imported_declaration
,
9352 &objfile
->objfile_obstack
);
9354 do_cleanups (cleanups
);
9357 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
9358 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
9359 this, it was first present in GCC release 4.3.0. */
9362 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
9364 if (!cu
->checked_producer
)
9365 check_producer (cu
);
9367 return cu
->producer_is_gcc_lt_4_3
;
9370 static file_and_directory
9371 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
9373 file_and_directory res
;
9375 /* Find the filename. Do not use dwarf2_name here, since the filename
9376 is not a source language identifier. */
9377 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
9378 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
9380 if (res
.comp_dir
== NULL
9381 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
9382 && IS_ABSOLUTE_PATH (res
.name
))
9384 res
.comp_dir_storage
= ldirname (res
.name
);
9385 if (!res
.comp_dir_storage
.empty ())
9386 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
9388 if (res
.comp_dir
!= NULL
)
9390 /* Irix 6.2 native cc prepends <machine>.: to the compilation
9391 directory, get rid of it. */
9392 const char *cp
= strchr (res
.comp_dir
, ':');
9394 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
9395 res
.comp_dir
= cp
+ 1;
9398 if (res
.name
== NULL
)
9399 res
.name
= "<unknown>";
9404 /* Handle DW_AT_stmt_list for a compilation unit.
9405 DIE is the DW_TAG_compile_unit die for CU.
9406 COMP_DIR is the compilation directory. LOWPC is passed to
9407 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
9410 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
9411 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
9413 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9414 struct attribute
*attr
;
9415 struct line_header line_header_local
;
9416 hashval_t line_header_local_hash
;
9421 gdb_assert (! cu
->per_cu
->is_debug_types
);
9423 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9427 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
9429 /* The line header hash table is only created if needed (it exists to
9430 prevent redundant reading of the line table for partial_units).
9431 If we're given a partial_unit, we'll need it. If we're given a
9432 compile_unit, then use the line header hash table if it's already
9433 created, but don't create one just yet. */
9435 if (dwarf2_per_objfile
->line_header_hash
== NULL
9436 && die
->tag
== DW_TAG_partial_unit
)
9438 dwarf2_per_objfile
->line_header_hash
9439 = htab_create_alloc_ex (127, line_header_hash_voidp
,
9440 line_header_eq_voidp
,
9441 free_line_header_voidp
,
9442 &objfile
->objfile_obstack
,
9443 hashtab_obstack_allocate
,
9444 dummy_obstack_deallocate
);
9447 line_header_local
.sect_off
= line_offset
;
9448 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
9449 line_header_local_hash
= line_header_hash (&line_header_local
);
9450 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
9452 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9454 line_header_local_hash
, NO_INSERT
);
9456 /* For DW_TAG_compile_unit we need info like symtab::linetable which
9457 is not present in *SLOT (since if there is something in *SLOT then
9458 it will be for a partial_unit). */
9459 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
9461 gdb_assert (*slot
!= NULL
);
9462 cu
->line_header
= (struct line_header
*) *slot
;
9467 /* dwarf_decode_line_header does not yet provide sufficient information.
9468 We always have to call also dwarf_decode_lines for it. */
9469 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
9473 cu
->line_header
= lh
.release ();
9474 cu
->line_header_die_owner
= die
;
9476 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
9480 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
9482 line_header_local_hash
, INSERT
);
9483 gdb_assert (slot
!= NULL
);
9485 if (slot
!= NULL
&& *slot
== NULL
)
9487 /* This newly decoded line number information unit will be owned
9488 by line_header_hash hash table. */
9489 *slot
= cu
->line_header
;
9490 cu
->line_header_die_owner
= NULL
;
9494 /* We cannot free any current entry in (*slot) as that struct line_header
9495 may be already used by multiple CUs. Create only temporary decoded
9496 line_header for this CU - it may happen at most once for each line
9497 number information unit. And if we're not using line_header_hash
9498 then this is what we want as well. */
9499 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
9501 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
9502 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
9507 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
9510 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9512 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9513 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9514 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
9515 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
9516 struct attribute
*attr
;
9517 struct die_info
*child_die
;
9520 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9522 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
9524 /* If we didn't find a lowpc, set it to highpc to avoid complaints
9525 from finish_block. */
9526 if (lowpc
== ((CORE_ADDR
) -1))
9528 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
9530 file_and_directory fnd
= find_file_and_directory (die
, cu
);
9532 prepare_one_comp_unit (cu
, die
, cu
->language
);
9534 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
9535 standardised yet. As a workaround for the language detection we fall
9536 back to the DW_AT_producer string. */
9537 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
9538 cu
->language
= language_opencl
;
9540 /* Similar hack for Go. */
9541 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
9542 set_cu_language (DW_LANG_Go
, cu
);
9544 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
9546 /* Decode line number information if present. We do this before
9547 processing child DIEs, so that the line header table is available
9548 for DW_AT_decl_file. */
9549 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
9551 /* Process all dies in compilation unit. */
9552 if (die
->child
!= NULL
)
9554 child_die
= die
->child
;
9555 while (child_die
&& child_die
->tag
)
9557 process_die (child_die
, cu
);
9558 child_die
= sibling_die (child_die
);
9562 /* Decode macro information, if present. Dwarf 2 macro information
9563 refers to information in the line number info statement program
9564 header, so we can only read it if we've read the header
9566 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
9568 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
9569 if (attr
&& cu
->line_header
)
9571 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
9572 complaint (&symfile_complaints
,
9573 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
9575 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
9579 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
9580 if (attr
&& cu
->line_header
)
9582 unsigned int macro_offset
= DW_UNSND (attr
);
9584 dwarf_decode_macros (cu
, macro_offset
, 0);
9589 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
9590 Create the set of symtabs used by this TU, or if this TU is sharing
9591 symtabs with another TU and the symtabs have already been created
9592 then restore those symtabs in the line header.
9593 We don't need the pc/line-number mapping for type units. */
9596 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
9598 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
9599 struct type_unit_group
*tu_group
;
9601 struct attribute
*attr
;
9603 struct signatured_type
*sig_type
;
9605 gdb_assert (per_cu
->is_debug_types
);
9606 sig_type
= (struct signatured_type
*) per_cu
;
9608 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
9610 /* If we're using .gdb_index (includes -readnow) then
9611 per_cu->type_unit_group may not have been set up yet. */
9612 if (sig_type
->type_unit_group
== NULL
)
9613 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
9614 tu_group
= sig_type
->type_unit_group
;
9616 /* If we've already processed this stmt_list there's no real need to
9617 do it again, we could fake it and just recreate the part we need
9618 (file name,index -> symtab mapping). If data shows this optimization
9619 is useful we can do it then. */
9620 first_time
= tu_group
->compunit_symtab
== NULL
;
9622 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
9627 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
9628 lh
= dwarf_decode_line_header (line_offset
, cu
);
9633 dwarf2_start_symtab (cu
, "", NULL
, 0);
9636 gdb_assert (tu_group
->symtabs
== NULL
);
9637 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9642 cu
->line_header
= lh
.release ();
9643 cu
->line_header_die_owner
= die
;
9647 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
9649 /* Note: We don't assign tu_group->compunit_symtab yet because we're
9650 still initializing it, and our caller (a few levels up)
9651 process_full_type_unit still needs to know if this is the first
9654 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
9655 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
9656 cu
->line_header
->file_names
.size ());
9658 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
9660 file_entry
&fe
= cu
->line_header
->file_names
[i
];
9662 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
9664 if (current_subfile
->symtab
== NULL
)
9666 /* NOTE: start_subfile will recognize when it's been
9667 passed a file it has already seen. So we can't
9668 assume there's a simple mapping from
9669 cu->line_header->file_names to subfiles, plus
9670 cu->line_header->file_names may contain dups. */
9671 current_subfile
->symtab
9672 = allocate_symtab (cust
, current_subfile
->name
);
9675 fe
.symtab
= current_subfile
->symtab
;
9676 tu_group
->symtabs
[i
] = fe
.symtab
;
9681 restart_symtab (tu_group
->compunit_symtab
, "", 0);
9683 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
9685 file_entry
&fe
= cu
->line_header
->file_names
[i
];
9687 fe
.symtab
= tu_group
->symtabs
[i
];
9691 /* The main symtab is allocated last. Type units don't have DW_AT_name
9692 so they don't have a "real" (so to speak) symtab anyway.
9693 There is later code that will assign the main symtab to all symbols
9694 that don't have one. We need to handle the case of a symbol with a
9695 missing symtab (DW_AT_decl_file) anyway. */
9698 /* Process DW_TAG_type_unit.
9699 For TUs we want to skip the first top level sibling if it's not the
9700 actual type being defined by this TU. In this case the first top
9701 level sibling is there to provide context only. */
9704 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
9706 struct die_info
*child_die
;
9708 prepare_one_comp_unit (cu
, die
, language_minimal
);
9710 /* Initialize (or reinitialize) the machinery for building symtabs.
9711 We do this before processing child DIEs, so that the line header table
9712 is available for DW_AT_decl_file. */
9713 setup_type_unit_groups (die
, cu
);
9715 if (die
->child
!= NULL
)
9717 child_die
= die
->child
;
9718 while (child_die
&& child_die
->tag
)
9720 process_die (child_die
, cu
);
9721 child_die
= sibling_die (child_die
);
9728 http://gcc.gnu.org/wiki/DebugFission
9729 http://gcc.gnu.org/wiki/DebugFissionDWP
9731 To simplify handling of both DWO files ("object" files with the DWARF info)
9732 and DWP files (a file with the DWOs packaged up into one file), we treat
9733 DWP files as having a collection of virtual DWO files. */
9736 hash_dwo_file (const void *item
)
9738 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
9741 hash
= htab_hash_string (dwo_file
->dwo_name
);
9742 if (dwo_file
->comp_dir
!= NULL
)
9743 hash
+= htab_hash_string (dwo_file
->comp_dir
);
9748 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
9750 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
9751 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
9753 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
9755 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
9756 return lhs
->comp_dir
== rhs
->comp_dir
;
9757 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
9760 /* Allocate a hash table for DWO files. */
9763 allocate_dwo_file_hash_table (void)
9765 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9767 return htab_create_alloc_ex (41,
9771 &objfile
->objfile_obstack
,
9772 hashtab_obstack_allocate
,
9773 dummy_obstack_deallocate
);
9776 /* Lookup DWO file DWO_NAME. */
9779 lookup_dwo_file_slot (const char *dwo_name
, const char *comp_dir
)
9781 struct dwo_file find_entry
;
9784 if (dwarf2_per_objfile
->dwo_files
== NULL
)
9785 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
9787 memset (&find_entry
, 0, sizeof (find_entry
));
9788 find_entry
.dwo_name
= dwo_name
;
9789 find_entry
.comp_dir
= comp_dir
;
9790 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
9796 hash_dwo_unit (const void *item
)
9798 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
9800 /* This drops the top 32 bits of the id, but is ok for a hash. */
9801 return dwo_unit
->signature
;
9805 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
9807 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
9808 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
9810 /* The signature is assumed to be unique within the DWO file.
9811 So while object file CU dwo_id's always have the value zero,
9812 that's OK, assuming each object file DWO file has only one CU,
9813 and that's the rule for now. */
9814 return lhs
->signature
== rhs
->signature
;
9817 /* Allocate a hash table for DWO CUs,TUs.
9818 There is one of these tables for each of CUs,TUs for each DWO file. */
9821 allocate_dwo_unit_table (struct objfile
*objfile
)
9823 /* Start out with a pretty small number.
9824 Generally DWO files contain only one CU and maybe some TUs. */
9825 return htab_create_alloc_ex (3,
9829 &objfile
->objfile_obstack
,
9830 hashtab_obstack_allocate
,
9831 dummy_obstack_deallocate
);
9834 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
9836 struct create_dwo_cu_data
9838 struct dwo_file
*dwo_file
;
9839 struct dwo_unit dwo_unit
;
9842 /* die_reader_func for create_dwo_cu. */
9845 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
9846 const gdb_byte
*info_ptr
,
9847 struct die_info
*comp_unit_die
,
9851 struct dwarf2_cu
*cu
= reader
->cu
;
9852 sect_offset sect_off
= cu
->per_cu
->sect_off
;
9853 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
9854 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
9855 struct dwo_file
*dwo_file
= data
->dwo_file
;
9856 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
9857 struct attribute
*attr
;
9859 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
9862 complaint (&symfile_complaints
,
9863 _("Dwarf Error: debug entry at offset 0x%x is missing"
9864 " its dwo_id [in module %s]"),
9865 to_underlying (sect_off
), dwo_file
->dwo_name
);
9869 dwo_unit
->dwo_file
= dwo_file
;
9870 dwo_unit
->signature
= DW_UNSND (attr
);
9871 dwo_unit
->section
= section
;
9872 dwo_unit
->sect_off
= sect_off
;
9873 dwo_unit
->length
= cu
->per_cu
->length
;
9875 if (dwarf_read_debug
)
9876 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id %s\n",
9877 to_underlying (sect_off
),
9878 hex_string (dwo_unit
->signature
));
9881 /* Create the dwo_units for the CUs in a DWO_FILE.
9882 Note: This function processes DWO files only, not DWP files. */
9885 create_cus_hash_table (struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
9888 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9889 const struct dwarf2_section_info
*abbrev_section
= &dwo_file
.sections
.abbrev
;
9890 const gdb_byte
*info_ptr
, *end_ptr
;
9892 dwarf2_read_section (objfile
, §ion
);
9893 info_ptr
= section
.buffer
;
9895 if (info_ptr
== NULL
)
9898 if (dwarf_read_debug
)
9900 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
9901 get_section_name (§ion
),
9902 get_section_file_name (§ion
));
9905 end_ptr
= info_ptr
+ section
.size
;
9906 while (info_ptr
< end_ptr
)
9908 struct dwarf2_per_cu_data per_cu
;
9909 struct create_dwo_cu_data create_dwo_cu_data
;
9910 struct dwo_unit
*dwo_unit
;
9912 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
9914 memset (&create_dwo_cu_data
.dwo_unit
, 0,
9915 sizeof (create_dwo_cu_data
.dwo_unit
));
9916 memset (&per_cu
, 0, sizeof (per_cu
));
9917 per_cu
.objfile
= objfile
;
9918 per_cu
.is_debug_types
= 0;
9919 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
9920 per_cu
.section
= §ion
;
9921 create_dwo_cu_data
.dwo_file
= &dwo_file
;
9923 init_cutu_and_read_dies_no_follow (
9924 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
9925 info_ptr
+= per_cu
.length
;
9927 // If the unit could not be parsed, skip it.
9928 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
9931 if (cus_htab
== NULL
)
9932 cus_htab
= allocate_dwo_unit_table (objfile
);
9934 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
9935 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
9936 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
9937 gdb_assert (slot
!= NULL
);
9940 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
9941 sect_offset dup_sect_off
= dup_cu
->sect_off
;
9943 complaint (&symfile_complaints
,
9944 _("debug cu entry at offset 0x%x is duplicate to"
9945 " the entry at offset 0x%x, signature %s"),
9946 to_underlying (sect_off
), to_underlying (dup_sect_off
),
9947 hex_string (dwo_unit
->signature
));
9949 *slot
= (void *)dwo_unit
;
9953 /* DWP file .debug_{cu,tu}_index section format:
9954 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
9958 Both index sections have the same format, and serve to map a 64-bit
9959 signature to a set of section numbers. Each section begins with a header,
9960 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
9961 indexes, and a pool of 32-bit section numbers. The index sections will be
9962 aligned at 8-byte boundaries in the file.
9964 The index section header consists of:
9966 V, 32 bit version number
9968 N, 32 bit number of compilation units or type units in the index
9969 M, 32 bit number of slots in the hash table
9971 Numbers are recorded using the byte order of the application binary.
9973 The hash table begins at offset 16 in the section, and consists of an array
9974 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
9975 order of the application binary). Unused slots in the hash table are 0.
9976 (We rely on the extreme unlikeliness of a signature being exactly 0.)
9978 The parallel table begins immediately after the hash table
9979 (at offset 16 + 8 * M from the beginning of the section), and consists of an
9980 array of 32-bit indexes (using the byte order of the application binary),
9981 corresponding 1-1 with slots in the hash table. Each entry in the parallel
9982 table contains a 32-bit index into the pool of section numbers. For unused
9983 hash table slots, the corresponding entry in the parallel table will be 0.
9985 The pool of section numbers begins immediately following the hash table
9986 (at offset 16 + 12 * M from the beginning of the section). The pool of
9987 section numbers consists of an array of 32-bit words (using the byte order
9988 of the application binary). Each item in the array is indexed starting
9989 from 0. The hash table entry provides the index of the first section
9990 number in the set. Additional section numbers in the set follow, and the
9991 set is terminated by a 0 entry (section number 0 is not used in ELF).
9993 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
9994 section must be the first entry in the set, and the .debug_abbrev.dwo must
9995 be the second entry. Other members of the set may follow in any order.
10001 DWP Version 2 combines all the .debug_info, etc. sections into one,
10002 and the entries in the index tables are now offsets into these sections.
10003 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
10006 Index Section Contents:
10008 Hash Table of Signatures dwp_hash_table.hash_table
10009 Parallel Table of Indices dwp_hash_table.unit_table
10010 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
10011 Table of Section Sizes dwp_hash_table.v2.sizes
10013 The index section header consists of:
10015 V, 32 bit version number
10016 L, 32 bit number of columns in the table of section offsets
10017 N, 32 bit number of compilation units or type units in the index
10018 M, 32 bit number of slots in the hash table
10020 Numbers are recorded using the byte order of the application binary.
10022 The hash table has the same format as version 1.
10023 The parallel table of indices has the same format as version 1,
10024 except that the entries are origin-1 indices into the table of sections
10025 offsets and the table of section sizes.
10027 The table of offsets begins immediately following the parallel table
10028 (at offset 16 + 12 * M from the beginning of the section). The table is
10029 a two-dimensional array of 32-bit words (using the byte order of the
10030 application binary), with L columns and N+1 rows, in row-major order.
10031 Each row in the array is indexed starting from 0. The first row provides
10032 a key to the remaining rows: each column in this row provides an identifier
10033 for a debug section, and the offsets in the same column of subsequent rows
10034 refer to that section. The section identifiers are:
10036 DW_SECT_INFO 1 .debug_info.dwo
10037 DW_SECT_TYPES 2 .debug_types.dwo
10038 DW_SECT_ABBREV 3 .debug_abbrev.dwo
10039 DW_SECT_LINE 4 .debug_line.dwo
10040 DW_SECT_LOC 5 .debug_loc.dwo
10041 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
10042 DW_SECT_MACINFO 7 .debug_macinfo.dwo
10043 DW_SECT_MACRO 8 .debug_macro.dwo
10045 The offsets provided by the CU and TU index sections are the base offsets
10046 for the contributions made by each CU or TU to the corresponding section
10047 in the package file. Each CU and TU header contains an abbrev_offset
10048 field, used to find the abbreviations table for that CU or TU within the
10049 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
10050 be interpreted as relative to the base offset given in the index section.
10051 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
10052 should be interpreted as relative to the base offset for .debug_line.dwo,
10053 and offsets into other debug sections obtained from DWARF attributes should
10054 also be interpreted as relative to the corresponding base offset.
10056 The table of sizes begins immediately following the table of offsets.
10057 Like the table of offsets, it is a two-dimensional array of 32-bit words,
10058 with L columns and N rows, in row-major order. Each row in the array is
10059 indexed starting from 1 (row 0 is shared by the two tables).
10063 Hash table lookup is handled the same in version 1 and 2:
10065 We assume that N and M will not exceed 2^32 - 1.
10066 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
10068 Given a 64-bit compilation unit signature or a type signature S, an entry
10069 in the hash table is located as follows:
10071 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
10072 the low-order k bits all set to 1.
10074 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
10076 3) If the hash table entry at index H matches the signature, use that
10077 entry. If the hash table entry at index H is unused (all zeroes),
10078 terminate the search: the signature is not present in the table.
10080 4) Let H = (H + H') modulo M. Repeat at Step 3.
10082 Because M > N and H' and M are relatively prime, the search is guaranteed
10083 to stop at an unused slot or find the match. */
10085 /* Create a hash table to map DWO IDs to their CU/TU entry in
10086 .debug_{info,types}.dwo in DWP_FILE.
10087 Returns NULL if there isn't one.
10088 Note: This function processes DWP files only, not DWO files. */
10090 static struct dwp_hash_table
*
10091 create_dwp_hash_table (struct dwp_file
*dwp_file
, int is_debug_types
)
10093 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10094 bfd
*dbfd
= dwp_file
->dbfd
;
10095 const gdb_byte
*index_ptr
, *index_end
;
10096 struct dwarf2_section_info
*index
;
10097 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
10098 struct dwp_hash_table
*htab
;
10100 if (is_debug_types
)
10101 index
= &dwp_file
->sections
.tu_index
;
10103 index
= &dwp_file
->sections
.cu_index
;
10105 if (dwarf2_section_empty_p (index
))
10107 dwarf2_read_section (objfile
, index
);
10109 index_ptr
= index
->buffer
;
10110 index_end
= index_ptr
+ index
->size
;
10112 version
= read_4_bytes (dbfd
, index_ptr
);
10115 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
10119 nr_units
= read_4_bytes (dbfd
, index_ptr
);
10121 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
10124 if (version
!= 1 && version
!= 2)
10126 error (_("Dwarf Error: unsupported DWP file version (%s)"
10127 " [in module %s]"),
10128 pulongest (version
), dwp_file
->name
);
10130 if (nr_slots
!= (nr_slots
& -nr_slots
))
10132 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
10133 " is not power of 2 [in module %s]"),
10134 pulongest (nr_slots
), dwp_file
->name
);
10137 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
10138 htab
->version
= version
;
10139 htab
->nr_columns
= nr_columns
;
10140 htab
->nr_units
= nr_units
;
10141 htab
->nr_slots
= nr_slots
;
10142 htab
->hash_table
= index_ptr
;
10143 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
10145 /* Exit early if the table is empty. */
10146 if (nr_slots
== 0 || nr_units
== 0
10147 || (version
== 2 && nr_columns
== 0))
10149 /* All must be zero. */
10150 if (nr_slots
!= 0 || nr_units
!= 0
10151 || (version
== 2 && nr_columns
!= 0))
10153 complaint (&symfile_complaints
,
10154 _("Empty DWP but nr_slots,nr_units,nr_columns not"
10155 " all zero [in modules %s]"),
10163 htab
->section_pool
.v1
.indices
=
10164 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10165 /* It's harder to decide whether the section is too small in v1.
10166 V1 is deprecated anyway so we punt. */
10170 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
10171 int *ids
= htab
->section_pool
.v2
.section_ids
;
10172 /* Reverse map for error checking. */
10173 int ids_seen
[DW_SECT_MAX
+ 1];
10176 if (nr_columns
< 2)
10178 error (_("Dwarf Error: bad DWP hash table, too few columns"
10179 " in section table [in module %s]"),
10182 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
10184 error (_("Dwarf Error: bad DWP hash table, too many columns"
10185 " in section table [in module %s]"),
10188 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10189 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
10190 for (i
= 0; i
< nr_columns
; ++i
)
10192 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
10194 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
10196 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
10197 " in section table [in module %s]"),
10198 id
, dwp_file
->name
);
10200 if (ids_seen
[id
] != -1)
10202 error (_("Dwarf Error: bad DWP hash table, duplicate section"
10203 " id %d in section table [in module %s]"),
10204 id
, dwp_file
->name
);
10209 /* Must have exactly one info or types section. */
10210 if (((ids_seen
[DW_SECT_INFO
] != -1)
10211 + (ids_seen
[DW_SECT_TYPES
] != -1))
10214 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
10215 " DWO info/types section [in module %s]"),
10218 /* Must have an abbrev section. */
10219 if (ids_seen
[DW_SECT_ABBREV
] == -1)
10221 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
10222 " section [in module %s]"),
10225 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
10226 htab
->section_pool
.v2
.sizes
=
10227 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
10228 * nr_units
* nr_columns
);
10229 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
10230 * nr_units
* nr_columns
))
10233 error (_("Dwarf Error: DWP index section is corrupt (too small)"
10234 " [in module %s]"),
10242 /* Update SECTIONS with the data from SECTP.
10244 This function is like the other "locate" section routines that are
10245 passed to bfd_map_over_sections, but in this context the sections to
10246 read comes from the DWP V1 hash table, not the full ELF section table.
10248 The result is non-zero for success, or zero if an error was found. */
10251 locate_v1_virtual_dwo_sections (asection
*sectp
,
10252 struct virtual_v1_dwo_sections
*sections
)
10254 const struct dwop_section_names
*names
= &dwop_section_names
;
10256 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10258 /* There can be only one. */
10259 if (sections
->abbrev
.s
.section
!= NULL
)
10261 sections
->abbrev
.s
.section
= sectp
;
10262 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10264 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
10265 || section_is_p (sectp
->name
, &names
->types_dwo
))
10267 /* There can be only one. */
10268 if (sections
->info_or_types
.s
.section
!= NULL
)
10270 sections
->info_or_types
.s
.section
= sectp
;
10271 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
10273 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10275 /* There can be only one. */
10276 if (sections
->line
.s
.section
!= NULL
)
10278 sections
->line
.s
.section
= sectp
;
10279 sections
->line
.size
= bfd_get_section_size (sectp
);
10281 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10283 /* There can be only one. */
10284 if (sections
->loc
.s
.section
!= NULL
)
10286 sections
->loc
.s
.section
= sectp
;
10287 sections
->loc
.size
= bfd_get_section_size (sectp
);
10289 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10291 /* There can be only one. */
10292 if (sections
->macinfo
.s
.section
!= NULL
)
10294 sections
->macinfo
.s
.section
= sectp
;
10295 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10297 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10299 /* There can be only one. */
10300 if (sections
->macro
.s
.section
!= NULL
)
10302 sections
->macro
.s
.section
= sectp
;
10303 sections
->macro
.size
= bfd_get_section_size (sectp
);
10305 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10307 /* There can be only one. */
10308 if (sections
->str_offsets
.s
.section
!= NULL
)
10310 sections
->str_offsets
.s
.section
= sectp
;
10311 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10315 /* No other kind of section is valid. */
10322 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10323 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10324 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10325 This is for DWP version 1 files. */
10327 static struct dwo_unit
*
10328 create_dwo_unit_in_dwp_v1 (struct dwp_file
*dwp_file
,
10329 uint32_t unit_index
,
10330 const char *comp_dir
,
10331 ULONGEST signature
, int is_debug_types
)
10333 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10334 const struct dwp_hash_table
*dwp_htab
=
10335 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10336 bfd
*dbfd
= dwp_file
->dbfd
;
10337 const char *kind
= is_debug_types
? "TU" : "CU";
10338 struct dwo_file
*dwo_file
;
10339 struct dwo_unit
*dwo_unit
;
10340 struct virtual_v1_dwo_sections sections
;
10341 void **dwo_file_slot
;
10342 char *virtual_dwo_name
;
10343 struct cleanup
*cleanups
;
10346 gdb_assert (dwp_file
->version
== 1);
10348 if (dwarf_read_debug
)
10350 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
10352 pulongest (unit_index
), hex_string (signature
),
10356 /* Fetch the sections of this DWO unit.
10357 Put a limit on the number of sections we look for so that bad data
10358 doesn't cause us to loop forever. */
10360 #define MAX_NR_V1_DWO_SECTIONS \
10361 (1 /* .debug_info or .debug_types */ \
10362 + 1 /* .debug_abbrev */ \
10363 + 1 /* .debug_line */ \
10364 + 1 /* .debug_loc */ \
10365 + 1 /* .debug_str_offsets */ \
10366 + 1 /* .debug_macro or .debug_macinfo */ \
10367 + 1 /* trailing zero */)
10369 memset (§ions
, 0, sizeof (sections
));
10370 cleanups
= make_cleanup (null_cleanup
, 0);
10372 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
10375 uint32_t section_nr
=
10376 read_4_bytes (dbfd
,
10377 dwp_htab
->section_pool
.v1
.indices
10378 + (unit_index
+ i
) * sizeof (uint32_t));
10380 if (section_nr
== 0)
10382 if (section_nr
>= dwp_file
->num_sections
)
10384 error (_("Dwarf Error: bad DWP hash table, section number too large"
10385 " [in module %s]"),
10389 sectp
= dwp_file
->elf_sections
[section_nr
];
10390 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
10392 error (_("Dwarf Error: bad DWP hash table, invalid section found"
10393 " [in module %s]"),
10399 || dwarf2_section_empty_p (§ions
.info_or_types
)
10400 || dwarf2_section_empty_p (§ions
.abbrev
))
10402 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
10403 " [in module %s]"),
10406 if (i
== MAX_NR_V1_DWO_SECTIONS
)
10408 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
10409 " [in module %s]"),
10413 /* It's easier for the rest of the code if we fake a struct dwo_file and
10414 have dwo_unit "live" in that. At least for now.
10416 The DWP file can be made up of a random collection of CUs and TUs.
10417 However, for each CU + set of TUs that came from the same original DWO
10418 file, we can combine them back into a virtual DWO file to save space
10419 (fewer struct dwo_file objects to allocate). Remember that for really
10420 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10423 xstrprintf ("virtual-dwo/%d-%d-%d-%d",
10424 get_section_id (§ions
.abbrev
),
10425 get_section_id (§ions
.line
),
10426 get_section_id (§ions
.loc
),
10427 get_section_id (§ions
.str_offsets
));
10428 make_cleanup (xfree
, virtual_dwo_name
);
10429 /* Can we use an existing virtual DWO file? */
10430 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10431 /* Create one if necessary. */
10432 if (*dwo_file_slot
== NULL
)
10434 if (dwarf_read_debug
)
10436 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10439 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10441 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10443 strlen (virtual_dwo_name
));
10444 dwo_file
->comp_dir
= comp_dir
;
10445 dwo_file
->sections
.abbrev
= sections
.abbrev
;
10446 dwo_file
->sections
.line
= sections
.line
;
10447 dwo_file
->sections
.loc
= sections
.loc
;
10448 dwo_file
->sections
.macinfo
= sections
.macinfo
;
10449 dwo_file
->sections
.macro
= sections
.macro
;
10450 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
10451 /* The "str" section is global to the entire DWP file. */
10452 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10453 /* The info or types section is assigned below to dwo_unit,
10454 there's no need to record it in dwo_file.
10455 Also, we can't simply record type sections in dwo_file because
10456 we record a pointer into the vector in dwo_unit. As we collect more
10457 types we'll grow the vector and eventually have to reallocate space
10458 for it, invalidating all copies of pointers into the previous
10460 *dwo_file_slot
= dwo_file
;
10464 if (dwarf_read_debug
)
10466 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10469 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10471 do_cleanups (cleanups
);
10473 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10474 dwo_unit
->dwo_file
= dwo_file
;
10475 dwo_unit
->signature
= signature
;
10476 dwo_unit
->section
=
10477 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10478 *dwo_unit
->section
= sections
.info_or_types
;
10479 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10484 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
10485 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
10486 piece within that section used by a TU/CU, return a virtual section
10487 of just that piece. */
10489 static struct dwarf2_section_info
10490 create_dwp_v2_section (struct dwarf2_section_info
*section
,
10491 bfd_size_type offset
, bfd_size_type size
)
10493 struct dwarf2_section_info result
;
10496 gdb_assert (section
!= NULL
);
10497 gdb_assert (!section
->is_virtual
);
10499 memset (&result
, 0, sizeof (result
));
10500 result
.s
.containing_section
= section
;
10501 result
.is_virtual
= 1;
10506 sectp
= get_section_bfd_section (section
);
10508 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
10509 bounds of the real section. This is a pretty-rare event, so just
10510 flag an error (easier) instead of a warning and trying to cope. */
10512 || offset
+ size
> bfd_get_section_size (sectp
))
10514 bfd
*abfd
= sectp
->owner
;
10516 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
10517 " in section %s [in module %s]"),
10518 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
10519 objfile_name (dwarf2_per_objfile
->objfile
));
10522 result
.virtual_offset
= offset
;
10523 result
.size
= size
;
10527 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
10528 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
10529 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
10530 This is for DWP version 2 files. */
10532 static struct dwo_unit
*
10533 create_dwo_unit_in_dwp_v2 (struct dwp_file
*dwp_file
,
10534 uint32_t unit_index
,
10535 const char *comp_dir
,
10536 ULONGEST signature
, int is_debug_types
)
10538 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10539 const struct dwp_hash_table
*dwp_htab
=
10540 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10541 bfd
*dbfd
= dwp_file
->dbfd
;
10542 const char *kind
= is_debug_types
? "TU" : "CU";
10543 struct dwo_file
*dwo_file
;
10544 struct dwo_unit
*dwo_unit
;
10545 struct virtual_v2_dwo_sections sections
;
10546 void **dwo_file_slot
;
10547 char *virtual_dwo_name
;
10548 struct cleanup
*cleanups
;
10551 gdb_assert (dwp_file
->version
== 2);
10553 if (dwarf_read_debug
)
10555 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
10557 pulongest (unit_index
), hex_string (signature
),
10561 /* Fetch the section offsets of this DWO unit. */
10563 memset (§ions
, 0, sizeof (sections
));
10564 cleanups
= make_cleanup (null_cleanup
, 0);
10566 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
10568 uint32_t offset
= read_4_bytes (dbfd
,
10569 dwp_htab
->section_pool
.v2
.offsets
10570 + (((unit_index
- 1) * dwp_htab
->nr_columns
10572 * sizeof (uint32_t)));
10573 uint32_t size
= read_4_bytes (dbfd
,
10574 dwp_htab
->section_pool
.v2
.sizes
10575 + (((unit_index
- 1) * dwp_htab
->nr_columns
10577 * sizeof (uint32_t)));
10579 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
10582 case DW_SECT_TYPES
:
10583 sections
.info_or_types_offset
= offset
;
10584 sections
.info_or_types_size
= size
;
10586 case DW_SECT_ABBREV
:
10587 sections
.abbrev_offset
= offset
;
10588 sections
.abbrev_size
= size
;
10591 sections
.line_offset
= offset
;
10592 sections
.line_size
= size
;
10595 sections
.loc_offset
= offset
;
10596 sections
.loc_size
= size
;
10598 case DW_SECT_STR_OFFSETS
:
10599 sections
.str_offsets_offset
= offset
;
10600 sections
.str_offsets_size
= size
;
10602 case DW_SECT_MACINFO
:
10603 sections
.macinfo_offset
= offset
;
10604 sections
.macinfo_size
= size
;
10606 case DW_SECT_MACRO
:
10607 sections
.macro_offset
= offset
;
10608 sections
.macro_size
= size
;
10613 /* It's easier for the rest of the code if we fake a struct dwo_file and
10614 have dwo_unit "live" in that. At least for now.
10616 The DWP file can be made up of a random collection of CUs and TUs.
10617 However, for each CU + set of TUs that came from the same original DWO
10618 file, we can combine them back into a virtual DWO file to save space
10619 (fewer struct dwo_file objects to allocate). Remember that for really
10620 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
10623 xstrprintf ("virtual-dwo/%ld-%ld-%ld-%ld",
10624 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
10625 (long) (sections
.line_size
? sections
.line_offset
: 0),
10626 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
10627 (long) (sections
.str_offsets_size
10628 ? sections
.str_offsets_offset
: 0));
10629 make_cleanup (xfree
, virtual_dwo_name
);
10630 /* Can we use an existing virtual DWO file? */
10631 dwo_file_slot
= lookup_dwo_file_slot (virtual_dwo_name
, comp_dir
);
10632 /* Create one if necessary. */
10633 if (*dwo_file_slot
== NULL
)
10635 if (dwarf_read_debug
)
10637 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
10640 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10642 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
10644 strlen (virtual_dwo_name
));
10645 dwo_file
->comp_dir
= comp_dir
;
10646 dwo_file
->sections
.abbrev
=
10647 create_dwp_v2_section (&dwp_file
->sections
.abbrev
,
10648 sections
.abbrev_offset
, sections
.abbrev_size
);
10649 dwo_file
->sections
.line
=
10650 create_dwp_v2_section (&dwp_file
->sections
.line
,
10651 sections
.line_offset
, sections
.line_size
);
10652 dwo_file
->sections
.loc
=
10653 create_dwp_v2_section (&dwp_file
->sections
.loc
,
10654 sections
.loc_offset
, sections
.loc_size
);
10655 dwo_file
->sections
.macinfo
=
10656 create_dwp_v2_section (&dwp_file
->sections
.macinfo
,
10657 sections
.macinfo_offset
, sections
.macinfo_size
);
10658 dwo_file
->sections
.macro
=
10659 create_dwp_v2_section (&dwp_file
->sections
.macro
,
10660 sections
.macro_offset
, sections
.macro_size
);
10661 dwo_file
->sections
.str_offsets
=
10662 create_dwp_v2_section (&dwp_file
->sections
.str_offsets
,
10663 sections
.str_offsets_offset
,
10664 sections
.str_offsets_size
);
10665 /* The "str" section is global to the entire DWP file. */
10666 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
10667 /* The info or types section is assigned below to dwo_unit,
10668 there's no need to record it in dwo_file.
10669 Also, we can't simply record type sections in dwo_file because
10670 we record a pointer into the vector in dwo_unit. As we collect more
10671 types we'll grow the vector and eventually have to reallocate space
10672 for it, invalidating all copies of pointers into the previous
10674 *dwo_file_slot
= dwo_file
;
10678 if (dwarf_read_debug
)
10680 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
10683 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
10685 do_cleanups (cleanups
);
10687 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
10688 dwo_unit
->dwo_file
= dwo_file
;
10689 dwo_unit
->signature
= signature
;
10690 dwo_unit
->section
=
10691 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
10692 *dwo_unit
->section
= create_dwp_v2_section (is_debug_types
10693 ? &dwp_file
->sections
.types
10694 : &dwp_file
->sections
.info
,
10695 sections
.info_or_types_offset
,
10696 sections
.info_or_types_size
);
10697 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
10702 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
10703 Returns NULL if the signature isn't found. */
10705 static struct dwo_unit
*
10706 lookup_dwo_unit_in_dwp (struct dwp_file
*dwp_file
, const char *comp_dir
,
10707 ULONGEST signature
, int is_debug_types
)
10709 const struct dwp_hash_table
*dwp_htab
=
10710 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
10711 bfd
*dbfd
= dwp_file
->dbfd
;
10712 uint32_t mask
= dwp_htab
->nr_slots
- 1;
10713 uint32_t hash
= signature
& mask
;
10714 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
10717 struct dwo_unit find_dwo_cu
;
10719 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
10720 find_dwo_cu
.signature
= signature
;
10721 slot
= htab_find_slot (is_debug_types
10722 ? dwp_file
->loaded_tus
10723 : dwp_file
->loaded_cus
,
10724 &find_dwo_cu
, INSERT
);
10727 return (struct dwo_unit
*) *slot
;
10729 /* Use a for loop so that we don't loop forever on bad debug info. */
10730 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
10732 ULONGEST signature_in_table
;
10734 signature_in_table
=
10735 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
10736 if (signature_in_table
== signature
)
10738 uint32_t unit_index
=
10739 read_4_bytes (dbfd
,
10740 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
10742 if (dwp_file
->version
== 1)
10744 *slot
= create_dwo_unit_in_dwp_v1 (dwp_file
, unit_index
,
10745 comp_dir
, signature
,
10750 *slot
= create_dwo_unit_in_dwp_v2 (dwp_file
, unit_index
,
10751 comp_dir
, signature
,
10754 return (struct dwo_unit
*) *slot
;
10756 if (signature_in_table
== 0)
10758 hash
= (hash
+ hash2
) & mask
;
10761 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
10762 " [in module %s]"),
10766 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
10767 Open the file specified by FILE_NAME and hand it off to BFD for
10768 preliminary analysis. Return a newly initialized bfd *, which
10769 includes a canonicalized copy of FILE_NAME.
10770 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
10771 SEARCH_CWD is true if the current directory is to be searched.
10772 It will be searched before debug-file-directory.
10773 If successful, the file is added to the bfd include table of the
10774 objfile's bfd (see gdb_bfd_record_inclusion).
10775 If unable to find/open the file, return NULL.
10776 NOTE: This function is derived from symfile_bfd_open. */
10778 static gdb_bfd_ref_ptr
10779 try_open_dwop_file (const char *file_name
, int is_dwp
, int search_cwd
)
10782 char *absolute_name
;
10783 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
10784 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
10785 to debug_file_directory. */
10787 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
10791 if (*debug_file_directory
!= '\0')
10792 search_path
= concat (".", dirname_separator_string
,
10793 debug_file_directory
, (char *) NULL
);
10795 search_path
= xstrdup (".");
10798 search_path
= xstrdup (debug_file_directory
);
10800 flags
= OPF_RETURN_REALPATH
;
10802 flags
|= OPF_SEARCH_IN_PATH
;
10803 desc
= openp (search_path
, flags
, file_name
,
10804 O_RDONLY
| O_BINARY
, &absolute_name
);
10805 xfree (search_path
);
10809 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
, gnutarget
, desc
));
10810 xfree (absolute_name
);
10811 if (sym_bfd
== NULL
)
10813 bfd_set_cacheable (sym_bfd
.get (), 1);
10815 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
10818 /* Success. Record the bfd as having been included by the objfile's bfd.
10819 This is important because things like demangled_names_hash lives in the
10820 objfile's per_bfd space and may have references to things like symbol
10821 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
10822 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
10827 /* Try to open DWO file FILE_NAME.
10828 COMP_DIR is the DW_AT_comp_dir attribute.
10829 The result is the bfd handle of the file.
10830 If there is a problem finding or opening the file, return NULL.
10831 Upon success, the canonicalized path of the file is stored in the bfd,
10832 same as symfile_bfd_open. */
10834 static gdb_bfd_ref_ptr
10835 open_dwo_file (const char *file_name
, const char *comp_dir
)
10837 if (IS_ABSOLUTE_PATH (file_name
))
10838 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 0 /*search_cwd*/);
10840 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
10842 if (comp_dir
!= NULL
)
10844 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
10845 file_name
, (char *) NULL
);
10847 /* NOTE: If comp_dir is a relative path, this will also try the
10848 search path, which seems useful. */
10849 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (path_to_try
, 0 /*is_dwp*/,
10850 1 /*search_cwd*/));
10851 xfree (path_to_try
);
10856 /* That didn't work, try debug-file-directory, which, despite its name,
10857 is a list of paths. */
10859 if (*debug_file_directory
== '\0')
10862 return try_open_dwop_file (file_name
, 0 /*is_dwp*/, 1 /*search_cwd*/);
10865 /* This function is mapped across the sections and remembers the offset and
10866 size of each of the DWO debugging sections we are interested in. */
10869 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
10871 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
10872 const struct dwop_section_names
*names
= &dwop_section_names
;
10874 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
10876 dwo_sections
->abbrev
.s
.section
= sectp
;
10877 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
10879 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
10881 dwo_sections
->info
.s
.section
= sectp
;
10882 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
10884 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
10886 dwo_sections
->line
.s
.section
= sectp
;
10887 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
10889 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
10891 dwo_sections
->loc
.s
.section
= sectp
;
10892 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
10894 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
10896 dwo_sections
->macinfo
.s
.section
= sectp
;
10897 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
10899 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
10901 dwo_sections
->macro
.s
.section
= sectp
;
10902 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
10904 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
10906 dwo_sections
->str
.s
.section
= sectp
;
10907 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
10909 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
10911 dwo_sections
->str_offsets
.s
.section
= sectp
;
10912 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
10914 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
10916 struct dwarf2_section_info type_section
;
10918 memset (&type_section
, 0, sizeof (type_section
));
10919 type_section
.s
.section
= sectp
;
10920 type_section
.size
= bfd_get_section_size (sectp
);
10921 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
10926 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
10927 by PER_CU. This is for the non-DWP case.
10928 The result is NULL if DWO_NAME can't be found. */
10930 static struct dwo_file
*
10931 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
10932 const char *dwo_name
, const char *comp_dir
)
10934 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10935 struct dwo_file
*dwo_file
;
10936 struct cleanup
*cleanups
;
10938 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwo_name
, comp_dir
));
10941 if (dwarf_read_debug
)
10942 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
10945 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
10946 dwo_file
->dwo_name
= dwo_name
;
10947 dwo_file
->comp_dir
= comp_dir
;
10948 dwo_file
->dbfd
= dbfd
.release ();
10950 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
10952 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
10953 &dwo_file
->sections
);
10955 create_cus_hash_table (*dwo_file
, dwo_file
->sections
.info
, dwo_file
->cus
);
10957 create_debug_types_hash_table (dwo_file
, dwo_file
->sections
.types
,
10960 discard_cleanups (cleanups
);
10962 if (dwarf_read_debug
)
10963 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
10968 /* This function is mapped across the sections and remembers the offset and
10969 size of each of the DWP debugging sections common to version 1 and 2 that
10970 we are interested in. */
10973 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
10974 void *dwp_file_ptr
)
10976 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
10977 const struct dwop_section_names
*names
= &dwop_section_names
;
10978 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
10980 /* Record the ELF section number for later lookup: this is what the
10981 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
10982 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
10983 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
10985 /* Look for specific sections that we need. */
10986 if (section_is_p (sectp
->name
, &names
->str_dwo
))
10988 dwp_file
->sections
.str
.s
.section
= sectp
;
10989 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
10991 else if (section_is_p (sectp
->name
, &names
->cu_index
))
10993 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
10994 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
10996 else if (section_is_p (sectp
->name
, &names
->tu_index
))
10998 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
10999 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
11003 /* This function is mapped across the sections and remembers the offset and
11004 size of each of the DWP version 2 debugging sections that we are interested
11005 in. This is split into a separate function because we don't know if we
11006 have version 1 or 2 until we parse the cu_index/tu_index sections. */
11009 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
11011 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
11012 const struct dwop_section_names
*names
= &dwop_section_names
;
11013 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
11015 /* Record the ELF section number for later lookup: this is what the
11016 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
11017 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
11018 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
11020 /* Look for specific sections that we need. */
11021 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11023 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
11024 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
11026 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
11028 dwp_file
->sections
.info
.s
.section
= sectp
;
11029 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
11031 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11033 dwp_file
->sections
.line
.s
.section
= sectp
;
11034 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
11036 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11038 dwp_file
->sections
.loc
.s
.section
= sectp
;
11039 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
11041 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11043 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
11044 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
11046 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11048 dwp_file
->sections
.macro
.s
.section
= sectp
;
11049 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
11051 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11053 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
11054 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
11056 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
11058 dwp_file
->sections
.types
.s
.section
= sectp
;
11059 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
11063 /* Hash function for dwp_file loaded CUs/TUs. */
11066 hash_dwp_loaded_cutus (const void *item
)
11068 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11070 /* This drops the top 32 bits of the signature, but is ok for a hash. */
11071 return dwo_unit
->signature
;
11074 /* Equality function for dwp_file loaded CUs/TUs. */
11077 eq_dwp_loaded_cutus (const void *a
, const void *b
)
11079 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
11080 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
11082 return dua
->signature
== dub
->signature
;
11085 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
11088 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
11090 return htab_create_alloc_ex (3,
11091 hash_dwp_loaded_cutus
,
11092 eq_dwp_loaded_cutus
,
11094 &objfile
->objfile_obstack
,
11095 hashtab_obstack_allocate
,
11096 dummy_obstack_deallocate
);
11099 /* Try to open DWP file FILE_NAME.
11100 The result is the bfd handle of the file.
11101 If there is a problem finding or opening the file, return NULL.
11102 Upon success, the canonicalized path of the file is stored in the bfd,
11103 same as symfile_bfd_open. */
11105 static gdb_bfd_ref_ptr
11106 open_dwp_file (const char *file_name
)
11108 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (file_name
, 1 /*is_dwp*/,
11109 1 /*search_cwd*/));
11113 /* Work around upstream bug 15652.
11114 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
11115 [Whether that's a "bug" is debatable, but it is getting in our way.]
11116 We have no real idea where the dwp file is, because gdb's realpath-ing
11117 of the executable's path may have discarded the needed info.
11118 [IWBN if the dwp file name was recorded in the executable, akin to
11119 .gnu_debuglink, but that doesn't exist yet.]
11120 Strip the directory from FILE_NAME and search again. */
11121 if (*debug_file_directory
!= '\0')
11123 /* Don't implicitly search the current directory here.
11124 If the user wants to search "." to handle this case,
11125 it must be added to debug-file-directory. */
11126 return try_open_dwop_file (lbasename (file_name
), 1 /*is_dwp*/,
11133 /* Initialize the use of the DWP file for the current objfile.
11134 By convention the name of the DWP file is ${objfile}.dwp.
11135 The result is NULL if it can't be found. */
11137 static struct dwp_file
*
11138 open_and_init_dwp_file (void)
11140 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11141 struct dwp_file
*dwp_file
;
11143 /* Try to find first .dwp for the binary file before any symbolic links
11146 /* If the objfile is a debug file, find the name of the real binary
11147 file and get the name of dwp file from there. */
11148 std::string dwp_name
;
11149 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
11151 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
11152 const char *backlink_basename
= lbasename (backlink
->original_name
);
11154 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
11157 dwp_name
= objfile
->original_name
;
11159 dwp_name
+= ".dwp";
11161 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwp_name
.c_str ()));
11163 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
11165 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
11166 dwp_name
= objfile_name (objfile
);
11167 dwp_name
+= ".dwp";
11168 dbfd
= open_dwp_file (dwp_name
.c_str ());
11173 if (dwarf_read_debug
)
11174 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
11177 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
11178 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
11179 dwp_file
->dbfd
= dbfd
.release ();
11181 /* +1: section 0 is unused */
11182 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
11183 dwp_file
->elf_sections
=
11184 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
11185 dwp_file
->num_sections
, asection
*);
11187 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
11190 dwp_file
->cus
= create_dwp_hash_table (dwp_file
, 0);
11192 dwp_file
->tus
= create_dwp_hash_table (dwp_file
, 1);
11194 /* The DWP file version is stored in the hash table. Oh well. */
11195 if (dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
11197 /* Technically speaking, we should try to limp along, but this is
11198 pretty bizarre. We use pulongest here because that's the established
11199 portability solution (e.g, we cannot use %u for uint32_t). */
11200 error (_("Dwarf Error: DWP file CU version %s doesn't match"
11201 " TU version %s [in DWP file %s]"),
11202 pulongest (dwp_file
->cus
->version
),
11203 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
11205 dwp_file
->version
= dwp_file
->cus
->version
;
11207 if (dwp_file
->version
== 2)
11208 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
11211 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
11212 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
11214 if (dwarf_read_debug
)
11216 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
11217 fprintf_unfiltered (gdb_stdlog
,
11218 " %s CUs, %s TUs\n",
11219 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
11220 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
11226 /* Wrapper around open_and_init_dwp_file, only open it once. */
11228 static struct dwp_file
*
11229 get_dwp_file (void)
11231 if (! dwarf2_per_objfile
->dwp_checked
)
11233 dwarf2_per_objfile
->dwp_file
= open_and_init_dwp_file ();
11234 dwarf2_per_objfile
->dwp_checked
= 1;
11236 return dwarf2_per_objfile
->dwp_file
;
11239 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
11240 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
11241 or in the DWP file for the objfile, referenced by THIS_UNIT.
11242 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
11243 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
11245 This is called, for example, when wanting to read a variable with a
11246 complex location. Therefore we don't want to do file i/o for every call.
11247 Therefore we don't want to look for a DWO file on every call.
11248 Therefore we first see if we've already seen SIGNATURE in a DWP file,
11249 then we check if we've already seen DWO_NAME, and only THEN do we check
11252 The result is a pointer to the dwo_unit object or NULL if we didn't find it
11253 (dwo_id mismatch or couldn't find the DWO/DWP file). */
11255 static struct dwo_unit
*
11256 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
11257 const char *dwo_name
, const char *comp_dir
,
11258 ULONGEST signature
, int is_debug_types
)
11260 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11261 const char *kind
= is_debug_types
? "TU" : "CU";
11262 void **dwo_file_slot
;
11263 struct dwo_file
*dwo_file
;
11264 struct dwp_file
*dwp_file
;
11266 /* First see if there's a DWP file.
11267 If we have a DWP file but didn't find the DWO inside it, don't
11268 look for the original DWO file. It makes gdb behave differently
11269 depending on whether one is debugging in the build tree. */
11271 dwp_file
= get_dwp_file ();
11272 if (dwp_file
!= NULL
)
11274 const struct dwp_hash_table
*dwp_htab
=
11275 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11277 if (dwp_htab
!= NULL
)
11279 struct dwo_unit
*dwo_cutu
=
11280 lookup_dwo_unit_in_dwp (dwp_file
, comp_dir
,
11281 signature
, is_debug_types
);
11283 if (dwo_cutu
!= NULL
)
11285 if (dwarf_read_debug
)
11287 fprintf_unfiltered (gdb_stdlog
,
11288 "Virtual DWO %s %s found: @%s\n",
11289 kind
, hex_string (signature
),
11290 host_address_to_string (dwo_cutu
));
11298 /* No DWP file, look for the DWO file. */
11300 dwo_file_slot
= lookup_dwo_file_slot (dwo_name
, comp_dir
);
11301 if (*dwo_file_slot
== NULL
)
11303 /* Read in the file and build a table of the CUs/TUs it contains. */
11304 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
11306 /* NOTE: This will be NULL if unable to open the file. */
11307 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11309 if (dwo_file
!= NULL
)
11311 struct dwo_unit
*dwo_cutu
= NULL
;
11313 if (is_debug_types
&& dwo_file
->tus
)
11315 struct dwo_unit find_dwo_cutu
;
11317 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11318 find_dwo_cutu
.signature
= signature
;
11320 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
11322 else if (!is_debug_types
&& dwo_file
->cus
)
11324 struct dwo_unit find_dwo_cutu
;
11326 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
11327 find_dwo_cutu
.signature
= signature
;
11328 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
11332 if (dwo_cutu
!= NULL
)
11334 if (dwarf_read_debug
)
11336 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
11337 kind
, dwo_name
, hex_string (signature
),
11338 host_address_to_string (dwo_cutu
));
11345 /* We didn't find it. This could mean a dwo_id mismatch, or
11346 someone deleted the DWO/DWP file, or the search path isn't set up
11347 correctly to find the file. */
11349 if (dwarf_read_debug
)
11351 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
11352 kind
, dwo_name
, hex_string (signature
));
11355 /* This is a warning and not a complaint because it can be caused by
11356 pilot error (e.g., user accidentally deleting the DWO). */
11358 /* Print the name of the DWP file if we looked there, helps the user
11359 better diagnose the problem. */
11360 char *dwp_text
= NULL
;
11361 struct cleanup
*cleanups
;
11363 if (dwp_file
!= NULL
)
11364 dwp_text
= xstrprintf (" [in DWP file %s]", lbasename (dwp_file
->name
));
11365 cleanups
= make_cleanup (xfree
, dwp_text
);
11367 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset 0x%x"
11368 " [in module %s]"),
11369 kind
, dwo_name
, hex_string (signature
),
11370 dwp_text
!= NULL
? dwp_text
: "",
11371 this_unit
->is_debug_types
? "TU" : "CU",
11372 to_underlying (this_unit
->sect_off
), objfile_name (objfile
));
11374 do_cleanups (cleanups
);
11379 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
11380 See lookup_dwo_cutu_unit for details. */
11382 static struct dwo_unit
*
11383 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
11384 const char *dwo_name
, const char *comp_dir
,
11385 ULONGEST signature
)
11387 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
11390 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
11391 See lookup_dwo_cutu_unit for details. */
11393 static struct dwo_unit
*
11394 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
11395 const char *dwo_name
, const char *comp_dir
)
11397 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
11400 /* Traversal function for queue_and_load_all_dwo_tus. */
11403 queue_and_load_dwo_tu (void **slot
, void *info
)
11405 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
11406 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
11407 ULONGEST signature
= dwo_unit
->signature
;
11408 struct signatured_type
*sig_type
=
11409 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
11411 if (sig_type
!= NULL
)
11413 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
11415 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
11416 a real dependency of PER_CU on SIG_TYPE. That is detected later
11417 while processing PER_CU. */
11418 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
11419 load_full_type_unit (sig_cu
);
11420 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
11426 /* Queue all TUs contained in the DWO of PER_CU to be read in.
11427 The DWO may have the only definition of the type, though it may not be
11428 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
11429 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
11432 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
11434 struct dwo_unit
*dwo_unit
;
11435 struct dwo_file
*dwo_file
;
11437 gdb_assert (!per_cu
->is_debug_types
);
11438 gdb_assert (get_dwp_file () == NULL
);
11439 gdb_assert (per_cu
->cu
!= NULL
);
11441 dwo_unit
= per_cu
->cu
->dwo_unit
;
11442 gdb_assert (dwo_unit
!= NULL
);
11444 dwo_file
= dwo_unit
->dwo_file
;
11445 if (dwo_file
->tus
!= NULL
)
11446 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
11449 /* Free all resources associated with DWO_FILE.
11450 Close the DWO file and munmap the sections.
11451 All memory should be on the objfile obstack. */
11454 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
11457 /* Note: dbfd is NULL for virtual DWO files. */
11458 gdb_bfd_unref (dwo_file
->dbfd
);
11460 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
11463 /* Wrapper for free_dwo_file for use in cleanups. */
11466 free_dwo_file_cleanup (void *arg
)
11468 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
11469 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11471 free_dwo_file (dwo_file
, objfile
);
11474 /* Traversal function for free_dwo_files. */
11477 free_dwo_file_from_slot (void **slot
, void *info
)
11479 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
11480 struct objfile
*objfile
= (struct objfile
*) info
;
11482 free_dwo_file (dwo_file
, objfile
);
11487 /* Free all resources associated with DWO_FILES. */
11490 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
11492 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
11495 /* Read in various DIEs. */
11497 /* qsort helper for inherit_abstract_dies. */
11500 unsigned_int_compar (const void *ap
, const void *bp
)
11502 unsigned int a
= *(unsigned int *) ap
;
11503 unsigned int b
= *(unsigned int *) bp
;
11505 return (a
> b
) - (b
> a
);
11508 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
11509 Inherit only the children of the DW_AT_abstract_origin DIE not being
11510 already referenced by DW_AT_abstract_origin from the children of the
11514 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
11516 struct die_info
*child_die
;
11517 unsigned die_children_count
;
11518 /* CU offsets which were referenced by children of the current DIE. */
11519 sect_offset
*offsets
;
11520 sect_offset
*offsets_end
, *offsetp
;
11521 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
11522 struct die_info
*origin_die
;
11523 /* Iterator of the ORIGIN_DIE children. */
11524 struct die_info
*origin_child_die
;
11525 struct cleanup
*cleanups
;
11526 struct attribute
*attr
;
11527 struct dwarf2_cu
*origin_cu
;
11528 struct pending
**origin_previous_list_in_scope
;
11530 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
11534 /* Note that following die references may follow to a die in a
11538 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
11540 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
11542 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
11543 origin_cu
->list_in_scope
= cu
->list_in_scope
;
11545 if (die
->tag
!= origin_die
->tag
11546 && !(die
->tag
== DW_TAG_inlined_subroutine
11547 && origin_die
->tag
== DW_TAG_subprogram
))
11548 complaint (&symfile_complaints
,
11549 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
11550 to_underlying (die
->sect_off
),
11551 to_underlying (origin_die
->sect_off
));
11553 child_die
= die
->child
;
11554 die_children_count
= 0;
11555 while (child_die
&& child_die
->tag
)
11557 child_die
= sibling_die (child_die
);
11558 die_children_count
++;
11560 offsets
= XNEWVEC (sect_offset
, die_children_count
);
11561 cleanups
= make_cleanup (xfree
, offsets
);
11563 offsets_end
= offsets
;
11564 for (child_die
= die
->child
;
11565 child_die
&& child_die
->tag
;
11566 child_die
= sibling_die (child_die
))
11568 struct die_info
*child_origin_die
;
11569 struct dwarf2_cu
*child_origin_cu
;
11571 /* We are trying to process concrete instance entries:
11572 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
11573 it's not relevant to our analysis here. i.e. detecting DIEs that are
11574 present in the abstract instance but not referenced in the concrete
11576 if (child_die
->tag
== DW_TAG_call_site
11577 || child_die
->tag
== DW_TAG_GNU_call_site
)
11580 /* For each CHILD_DIE, find the corresponding child of
11581 ORIGIN_DIE. If there is more than one layer of
11582 DW_AT_abstract_origin, follow them all; there shouldn't be,
11583 but GCC versions at least through 4.4 generate this (GCC PR
11585 child_origin_die
= child_die
;
11586 child_origin_cu
= cu
;
11589 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
11593 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
11597 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
11598 counterpart may exist. */
11599 if (child_origin_die
!= child_die
)
11601 if (child_die
->tag
!= child_origin_die
->tag
11602 && !(child_die
->tag
== DW_TAG_inlined_subroutine
11603 && child_origin_die
->tag
== DW_TAG_subprogram
))
11604 complaint (&symfile_complaints
,
11605 _("Child DIE 0x%x and its abstract origin 0x%x have "
11607 to_underlying (child_die
->sect_off
),
11608 to_underlying (child_origin_die
->sect_off
));
11609 if (child_origin_die
->parent
!= origin_die
)
11610 complaint (&symfile_complaints
,
11611 _("Child DIE 0x%x and its abstract origin 0x%x have "
11612 "different parents"),
11613 to_underlying (child_die
->sect_off
),
11614 to_underlying (child_origin_die
->sect_off
));
11616 *offsets_end
++ = child_origin_die
->sect_off
;
11619 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
11620 unsigned_int_compar
);
11621 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
11622 if (offsetp
[-1] == *offsetp
)
11623 complaint (&symfile_complaints
,
11624 _("Multiple children of DIE 0x%x refer "
11625 "to DIE 0x%x as their abstract origin"),
11626 to_underlying (die
->sect_off
), to_underlying (*offsetp
));
11629 origin_child_die
= origin_die
->child
;
11630 while (origin_child_die
&& origin_child_die
->tag
)
11632 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
11633 while (offsetp
< offsets_end
11634 && *offsetp
< origin_child_die
->sect_off
)
11636 if (offsetp
>= offsets_end
11637 || *offsetp
> origin_child_die
->sect_off
)
11639 /* Found that ORIGIN_CHILD_DIE is really not referenced.
11640 Check whether we're already processing ORIGIN_CHILD_DIE.
11641 This can happen with mutually referenced abstract_origins.
11643 if (!origin_child_die
->in_process
)
11644 process_die (origin_child_die
, origin_cu
);
11646 origin_child_die
= sibling_die (origin_child_die
);
11648 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
11650 do_cleanups (cleanups
);
11654 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11656 struct objfile
*objfile
= cu
->objfile
;
11657 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11658 struct context_stack
*newobj
;
11661 struct die_info
*child_die
;
11662 struct attribute
*attr
, *call_line
, *call_file
;
11664 CORE_ADDR baseaddr
;
11665 struct block
*block
;
11666 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11667 VEC (symbolp
) *template_args
= NULL
;
11668 struct template_symbol
*templ_func
= NULL
;
11672 /* If we do not have call site information, we can't show the
11673 caller of this inlined function. That's too confusing, so
11674 only use the scope for local variables. */
11675 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
11676 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
11677 if (call_line
== NULL
|| call_file
== NULL
)
11679 read_lexical_block_scope (die
, cu
);
11684 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11686 name
= dwarf2_name (die
, cu
);
11688 /* Ignore functions with missing or empty names. These are actually
11689 illegal according to the DWARF standard. */
11692 complaint (&symfile_complaints
,
11693 _("missing name for subprogram DIE at %d"),
11694 to_underlying (die
->sect_off
));
11698 /* Ignore functions with missing or invalid low and high pc attributes. */
11699 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
11700 <= PC_BOUNDS_INVALID
)
11702 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
11703 if (!attr
|| !DW_UNSND (attr
))
11704 complaint (&symfile_complaints
,
11705 _("cannot get low and high bounds "
11706 "for subprogram DIE at %d"),
11707 to_underlying (die
->sect_off
));
11711 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11712 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11714 /* If we have any template arguments, then we must allocate a
11715 different sort of symbol. */
11716 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
11718 if (child_die
->tag
== DW_TAG_template_type_param
11719 || child_die
->tag
== DW_TAG_template_value_param
)
11721 templ_func
= allocate_template_symbol (objfile
);
11722 templ_func
->base
.is_cplus_template_function
= 1;
11727 newobj
= push_context (0, lowpc
);
11728 newobj
->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
11729 (struct symbol
*) templ_func
);
11731 /* If there is a location expression for DW_AT_frame_base, record
11733 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
11735 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
11737 /* If there is a location for the static link, record it. */
11738 newobj
->static_link
= NULL
;
11739 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
11742 newobj
->static_link
11743 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
11744 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
11747 cu
->list_in_scope
= &local_symbols
;
11749 if (die
->child
!= NULL
)
11751 child_die
= die
->child
;
11752 while (child_die
&& child_die
->tag
)
11754 if (child_die
->tag
== DW_TAG_template_type_param
11755 || child_die
->tag
== DW_TAG_template_value_param
)
11757 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
11760 VEC_safe_push (symbolp
, template_args
, arg
);
11763 process_die (child_die
, cu
);
11764 child_die
= sibling_die (child_die
);
11768 inherit_abstract_dies (die
, cu
);
11770 /* If we have a DW_AT_specification, we might need to import using
11771 directives from the context of the specification DIE. See the
11772 comment in determine_prefix. */
11773 if (cu
->language
== language_cplus
11774 && dwarf2_attr (die
, DW_AT_specification
, cu
))
11776 struct dwarf2_cu
*spec_cu
= cu
;
11777 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
11781 child_die
= spec_die
->child
;
11782 while (child_die
&& child_die
->tag
)
11784 if (child_die
->tag
== DW_TAG_imported_module
)
11785 process_die (child_die
, spec_cu
);
11786 child_die
= sibling_die (child_die
);
11789 /* In some cases, GCC generates specification DIEs that
11790 themselves contain DW_AT_specification attributes. */
11791 spec_die
= die_specification (spec_die
, &spec_cu
);
11795 newobj
= pop_context ();
11796 /* Make a block for the local symbols within. */
11797 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
11798 newobj
->static_link
, lowpc
, highpc
);
11800 /* For C++, set the block's scope. */
11801 if ((cu
->language
== language_cplus
11802 || cu
->language
== language_fortran
11803 || cu
->language
== language_d
11804 || cu
->language
== language_rust
)
11805 && cu
->processing_has_namespace_info
)
11806 block_set_scope (block
, determine_prefix (die
, cu
),
11807 &objfile
->objfile_obstack
);
11809 /* If we have address ranges, record them. */
11810 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11812 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
11814 /* Attach template arguments to function. */
11815 if (! VEC_empty (symbolp
, template_args
))
11817 gdb_assert (templ_func
!= NULL
);
11819 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
11820 templ_func
->template_arguments
11821 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
11822 templ_func
->n_template_arguments
);
11823 memcpy (templ_func
->template_arguments
,
11824 VEC_address (symbolp
, template_args
),
11825 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
11826 VEC_free (symbolp
, template_args
);
11829 /* In C++, we can have functions nested inside functions (e.g., when
11830 a function declares a class that has methods). This means that
11831 when we finish processing a function scope, we may need to go
11832 back to building a containing block's symbol lists. */
11833 local_symbols
= newobj
->locals
;
11834 local_using_directives
= newobj
->local_using_directives
;
11836 /* If we've finished processing a top-level function, subsequent
11837 symbols go in the file symbol list. */
11838 if (outermost_context_p ())
11839 cu
->list_in_scope
= &file_symbols
;
11842 /* Process all the DIES contained within a lexical block scope. Start
11843 a new scope, process the dies, and then close the scope. */
11846 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11848 struct objfile
*objfile
= cu
->objfile
;
11849 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11850 struct context_stack
*newobj
;
11851 CORE_ADDR lowpc
, highpc
;
11852 struct die_info
*child_die
;
11853 CORE_ADDR baseaddr
;
11855 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11857 /* Ignore blocks with missing or invalid low and high pc attributes. */
11858 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
11859 as multiple lexical blocks? Handling children in a sane way would
11860 be nasty. Might be easier to properly extend generic blocks to
11861 describe ranges. */
11862 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
11864 case PC_BOUNDS_NOT_PRESENT
:
11865 /* DW_TAG_lexical_block has no attributes, process its children as if
11866 there was no wrapping by that DW_TAG_lexical_block.
11867 GCC does no longer produces such DWARF since GCC r224161. */
11868 for (child_die
= die
->child
;
11869 child_die
!= NULL
&& child_die
->tag
;
11870 child_die
= sibling_die (child_die
))
11871 process_die (child_die
, cu
);
11873 case PC_BOUNDS_INVALID
:
11876 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11877 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
11879 push_context (0, lowpc
);
11880 if (die
->child
!= NULL
)
11882 child_die
= die
->child
;
11883 while (child_die
&& child_die
->tag
)
11885 process_die (child_die
, cu
);
11886 child_die
= sibling_die (child_die
);
11889 inherit_abstract_dies (die
, cu
);
11890 newobj
= pop_context ();
11892 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
11894 struct block
*block
11895 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
11896 newobj
->start_addr
, highpc
);
11898 /* Note that recording ranges after traversing children, as we
11899 do here, means that recording a parent's ranges entails
11900 walking across all its children's ranges as they appear in
11901 the address map, which is quadratic behavior.
11903 It would be nicer to record the parent's ranges before
11904 traversing its children, simply overriding whatever you find
11905 there. But since we don't even decide whether to create a
11906 block until after we've traversed its children, that's hard
11908 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
11910 local_symbols
= newobj
->locals
;
11911 local_using_directives
= newobj
->local_using_directives
;
11914 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
11917 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11919 struct objfile
*objfile
= cu
->objfile
;
11920 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11921 CORE_ADDR pc
, baseaddr
;
11922 struct attribute
*attr
;
11923 struct call_site
*call_site
, call_site_local
;
11926 struct die_info
*child_die
;
11928 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11930 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
11933 /* This was a pre-DWARF-5 GNU extension alias
11934 for DW_AT_call_return_pc. */
11935 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11939 complaint (&symfile_complaints
,
11940 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
11941 "DIE 0x%x [in module %s]"),
11942 to_underlying (die
->sect_off
), objfile_name (objfile
));
11945 pc
= attr_value_as_address (attr
) + baseaddr
;
11946 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
11948 if (cu
->call_site_htab
== NULL
)
11949 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
11950 NULL
, &objfile
->objfile_obstack
,
11951 hashtab_obstack_allocate
, NULL
);
11952 call_site_local
.pc
= pc
;
11953 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
11956 complaint (&symfile_complaints
,
11957 _("Duplicate PC %s for DW_TAG_call_site "
11958 "DIE 0x%x [in module %s]"),
11959 paddress (gdbarch
, pc
), to_underlying (die
->sect_off
),
11960 objfile_name (objfile
));
11964 /* Count parameters at the caller. */
11967 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11968 child_die
= sibling_die (child_die
))
11970 if (child_die
->tag
!= DW_TAG_call_site_parameter
11971 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
11973 complaint (&symfile_complaints
,
11974 _("Tag %d is not DW_TAG_call_site_parameter in "
11975 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
11976 child_die
->tag
, to_underlying (child_die
->sect_off
),
11977 objfile_name (objfile
));
11985 = ((struct call_site
*)
11986 obstack_alloc (&objfile
->objfile_obstack
,
11987 sizeof (*call_site
)
11988 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
11990 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
11991 call_site
->pc
= pc
;
11993 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
11994 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
11996 struct die_info
*func_die
;
11998 /* Skip also over DW_TAG_inlined_subroutine. */
11999 for (func_die
= die
->parent
;
12000 func_die
&& func_die
->tag
!= DW_TAG_subprogram
12001 && func_die
->tag
!= DW_TAG_subroutine_type
;
12002 func_die
= func_die
->parent
);
12004 /* DW_AT_call_all_calls is a superset
12005 of DW_AT_call_all_tail_calls. */
12007 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
12008 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
12009 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
12010 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
12012 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
12013 not complete. But keep CALL_SITE for look ups via call_site_htab,
12014 both the initial caller containing the real return address PC and
12015 the final callee containing the current PC of a chain of tail
12016 calls do not need to have the tail call list complete. But any
12017 function candidate for a virtual tail call frame searched via
12018 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
12019 determined unambiguously. */
12023 struct type
*func_type
= NULL
;
12026 func_type
= get_die_type (func_die
, cu
);
12027 if (func_type
!= NULL
)
12029 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
12031 /* Enlist this call site to the function. */
12032 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
12033 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
12036 complaint (&symfile_complaints
,
12037 _("Cannot find function owning DW_TAG_call_site "
12038 "DIE 0x%x [in module %s]"),
12039 to_underlying (die
->sect_off
), objfile_name (objfile
));
12043 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
12045 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
12047 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
12050 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
12051 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12053 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
12054 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
12055 /* Keep NULL DWARF_BLOCK. */;
12056 else if (attr_form_is_block (attr
))
12058 struct dwarf2_locexpr_baton
*dlbaton
;
12060 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
12061 dlbaton
->data
= DW_BLOCK (attr
)->data
;
12062 dlbaton
->size
= DW_BLOCK (attr
)->size
;
12063 dlbaton
->per_cu
= cu
->per_cu
;
12065 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
12067 else if (attr_form_is_ref (attr
))
12069 struct dwarf2_cu
*target_cu
= cu
;
12070 struct die_info
*target_die
;
12072 target_die
= follow_die_ref (die
, attr
, &target_cu
);
12073 gdb_assert (target_cu
->objfile
== objfile
);
12074 if (die_is_declaration (target_die
, target_cu
))
12076 const char *target_physname
;
12078 /* Prefer the mangled name; otherwise compute the demangled one. */
12079 target_physname
= dw2_linkage_name (target_die
, target_cu
);
12080 if (target_physname
== NULL
)
12081 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
12082 if (target_physname
== NULL
)
12083 complaint (&symfile_complaints
,
12084 _("DW_AT_call_target target DIE has invalid "
12085 "physname, for referencing DIE 0x%x [in module %s]"),
12086 to_underlying (die
->sect_off
), objfile_name (objfile
));
12088 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
12094 /* DW_AT_entry_pc should be preferred. */
12095 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
12096 <= PC_BOUNDS_INVALID
)
12097 complaint (&symfile_complaints
,
12098 _("DW_AT_call_target target DIE has invalid "
12099 "low pc, for referencing DIE 0x%x [in module %s]"),
12100 to_underlying (die
->sect_off
), objfile_name (objfile
));
12103 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
12104 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
12109 complaint (&symfile_complaints
,
12110 _("DW_TAG_call_site DW_AT_call_target is neither "
12111 "block nor reference, for DIE 0x%x [in module %s]"),
12112 to_underlying (die
->sect_off
), objfile_name (objfile
));
12114 call_site
->per_cu
= cu
->per_cu
;
12116 for (child_die
= die
->child
;
12117 child_die
&& child_die
->tag
;
12118 child_die
= sibling_die (child_die
))
12120 struct call_site_parameter
*parameter
;
12121 struct attribute
*loc
, *origin
;
12123 if (child_die
->tag
!= DW_TAG_call_site_parameter
12124 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
12126 /* Already printed the complaint above. */
12130 gdb_assert (call_site
->parameter_count
< nparams
);
12131 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
12133 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
12134 specifies DW_TAG_formal_parameter. Value of the data assumed for the
12135 register is contained in DW_AT_call_value. */
12137 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
12138 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
12139 if (origin
== NULL
)
12141 /* This was a pre-DWARF-5 GNU extension alias
12142 for DW_AT_call_parameter. */
12143 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
12145 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
12147 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
12149 sect_offset sect_off
12150 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
12151 if (!offset_in_cu_p (&cu
->header
, sect_off
))
12153 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
12154 binding can be done only inside one CU. Such referenced DIE
12155 therefore cannot be even moved to DW_TAG_partial_unit. */
12156 complaint (&symfile_complaints
,
12157 _("DW_AT_call_parameter offset is not in CU for "
12158 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12159 to_underlying (child_die
->sect_off
),
12160 objfile_name (objfile
));
12163 parameter
->u
.param_cu_off
12164 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
12166 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
12168 complaint (&symfile_complaints
,
12169 _("No DW_FORM_block* DW_AT_location for "
12170 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12171 to_underlying (child_die
->sect_off
), objfile_name (objfile
));
12176 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
12177 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
12178 if (parameter
->u
.dwarf_reg
!= -1)
12179 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
12180 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
12181 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
12182 ¶meter
->u
.fb_offset
))
12183 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
12186 complaint (&symfile_complaints
,
12187 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
12188 "for DW_FORM_block* DW_AT_location is supported for "
12189 "DW_TAG_call_site child DIE 0x%x "
12191 to_underlying (child_die
->sect_off
),
12192 objfile_name (objfile
));
12197 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
12199 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
12200 if (!attr_form_is_block (attr
))
12202 complaint (&symfile_complaints
,
12203 _("No DW_FORM_block* DW_AT_call_value for "
12204 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12205 to_underlying (child_die
->sect_off
),
12206 objfile_name (objfile
));
12209 parameter
->value
= DW_BLOCK (attr
)->data
;
12210 parameter
->value_size
= DW_BLOCK (attr
)->size
;
12212 /* Parameters are not pre-cleared by memset above. */
12213 parameter
->data_value
= NULL
;
12214 parameter
->data_value_size
= 0;
12215 call_site
->parameter_count
++;
12217 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
12219 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
12222 if (!attr_form_is_block (attr
))
12223 complaint (&symfile_complaints
,
12224 _("No DW_FORM_block* DW_AT_call_data_value for "
12225 "DW_TAG_call_site child DIE 0x%x [in module %s]"),
12226 to_underlying (child_die
->sect_off
),
12227 objfile_name (objfile
));
12230 parameter
->data_value
= DW_BLOCK (attr
)->data
;
12231 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
12237 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
12238 reading .debug_rnglists.
12239 Callback's type should be:
12240 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
12241 Return true if the attributes are present and valid, otherwise,
12244 template <typename Callback
>
12246 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
12247 Callback
&&callback
)
12249 struct objfile
*objfile
= cu
->objfile
;
12250 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12251 struct comp_unit_head
*cu_header
= &cu
->header
;
12252 bfd
*obfd
= objfile
->obfd
;
12253 unsigned int addr_size
= cu_header
->addr_size
;
12254 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12255 /* Base address selection entry. */
12258 unsigned int dummy
;
12259 const gdb_byte
*buffer
;
12261 CORE_ADDR high
= 0;
12262 CORE_ADDR baseaddr
;
12263 bool overflow
= false;
12265 found_base
= cu
->base_known
;
12266 base
= cu
->base_address
;
12268 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
12269 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
12271 complaint (&symfile_complaints
,
12272 _("Offset %d out of bounds for DW_AT_ranges attribute"),
12276 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
12278 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12282 /* Initialize it due to a false compiler warning. */
12283 CORE_ADDR range_beginning
= 0, range_end
= 0;
12284 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
12285 + dwarf2_per_objfile
->rnglists
.size
);
12286 unsigned int bytes_read
;
12288 if (buffer
== buf_end
)
12293 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
12296 case DW_RLE_end_of_list
:
12298 case DW_RLE_base_address
:
12299 if (buffer
+ cu
->header
.addr_size
> buf_end
)
12304 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12306 buffer
+= bytes_read
;
12308 case DW_RLE_start_length
:
12309 if (buffer
+ cu
->header
.addr_size
> buf_end
)
12314 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12315 buffer
+= bytes_read
;
12316 range_end
= (range_beginning
12317 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
12318 buffer
+= bytes_read
;
12319 if (buffer
> buf_end
)
12325 case DW_RLE_offset_pair
:
12326 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
12327 buffer
+= bytes_read
;
12328 if (buffer
> buf_end
)
12333 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
12334 buffer
+= bytes_read
;
12335 if (buffer
> buf_end
)
12341 case DW_RLE_start_end
:
12342 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
12347 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12348 buffer
+= bytes_read
;
12349 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
12350 buffer
+= bytes_read
;
12353 complaint (&symfile_complaints
,
12354 _("Invalid .debug_rnglists data (no base address)"));
12357 if (rlet
== DW_RLE_end_of_list
|| overflow
)
12359 if (rlet
== DW_RLE_base_address
)
12364 /* We have no valid base address for the ranges
12366 complaint (&symfile_complaints
,
12367 _("Invalid .debug_rnglists data (no base address)"));
12371 if (range_beginning
> range_end
)
12373 /* Inverted range entries are invalid. */
12374 complaint (&symfile_complaints
,
12375 _("Invalid .debug_rnglists data (inverted range)"));
12379 /* Empty range entries have no effect. */
12380 if (range_beginning
== range_end
)
12383 range_beginning
+= base
;
12386 /* A not-uncommon case of bad debug info.
12387 Don't pollute the addrmap with bad data. */
12388 if (range_beginning
+ baseaddr
== 0
12389 && !dwarf2_per_objfile
->has_section_at_zero
)
12391 complaint (&symfile_complaints
,
12392 _(".debug_rnglists entry has start address of zero"
12393 " [in module %s]"), objfile_name (objfile
));
12397 callback (range_beginning
, range_end
);
12402 complaint (&symfile_complaints
,
12403 _("Offset %d is not terminated "
12404 "for DW_AT_ranges attribute"),
12412 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
12413 Callback's type should be:
12414 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
12415 Return 1 if the attributes are present and valid, otherwise, return 0. */
12417 template <typename Callback
>
12419 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
12420 Callback
&&callback
)
12422 struct objfile
*objfile
= cu
->objfile
;
12423 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12424 struct comp_unit_head
*cu_header
= &cu
->header
;
12425 bfd
*obfd
= objfile
->obfd
;
12426 unsigned int addr_size
= cu_header
->addr_size
;
12427 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12428 /* Base address selection entry. */
12431 unsigned int dummy
;
12432 const gdb_byte
*buffer
;
12433 CORE_ADDR baseaddr
;
12435 if (cu_header
->version
>= 5)
12436 return dwarf2_rnglists_process (offset
, cu
, callback
);
12438 found_base
= cu
->base_known
;
12439 base
= cu
->base_address
;
12441 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
12442 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
12444 complaint (&symfile_complaints
,
12445 _("Offset %d out of bounds for DW_AT_ranges attribute"),
12449 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
12451 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12455 CORE_ADDR range_beginning
, range_end
;
12457 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
12458 buffer
+= addr_size
;
12459 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
12460 buffer
+= addr_size
;
12461 offset
+= 2 * addr_size
;
12463 /* An end of list marker is a pair of zero addresses. */
12464 if (range_beginning
== 0 && range_end
== 0)
12465 /* Found the end of list entry. */
12468 /* Each base address selection entry is a pair of 2 values.
12469 The first is the largest possible address, the second is
12470 the base address. Check for a base address here. */
12471 if ((range_beginning
& mask
) == mask
)
12473 /* If we found the largest possible address, then we already
12474 have the base address in range_end. */
12482 /* We have no valid base address for the ranges
12484 complaint (&symfile_complaints
,
12485 _("Invalid .debug_ranges data (no base address)"));
12489 if (range_beginning
> range_end
)
12491 /* Inverted range entries are invalid. */
12492 complaint (&symfile_complaints
,
12493 _("Invalid .debug_ranges data (inverted range)"));
12497 /* Empty range entries have no effect. */
12498 if (range_beginning
== range_end
)
12501 range_beginning
+= base
;
12504 /* A not-uncommon case of bad debug info.
12505 Don't pollute the addrmap with bad data. */
12506 if (range_beginning
+ baseaddr
== 0
12507 && !dwarf2_per_objfile
->has_section_at_zero
)
12509 complaint (&symfile_complaints
,
12510 _(".debug_ranges entry has start address of zero"
12511 " [in module %s]"), objfile_name (objfile
));
12515 callback (range_beginning
, range_end
);
12521 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
12522 Return 1 if the attributes are present and valid, otherwise, return 0.
12523 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
12526 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
12527 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
12528 struct partial_symtab
*ranges_pst
)
12530 struct objfile
*objfile
= cu
->objfile
;
12531 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12532 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
12533 SECT_OFF_TEXT (objfile
));
12536 CORE_ADDR high
= 0;
12539 retval
= dwarf2_ranges_process (offset
, cu
,
12540 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
12542 if (ranges_pst
!= NULL
)
12547 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12548 range_beginning
+ baseaddr
);
12549 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
12550 range_end
+ baseaddr
);
12551 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
12555 /* FIXME: This is recording everything as a low-high
12556 segment of consecutive addresses. We should have a
12557 data structure for discontiguous block ranges
12561 low
= range_beginning
;
12567 if (range_beginning
< low
)
12568 low
= range_beginning
;
12569 if (range_end
> high
)
12577 /* If the first entry is an end-of-list marker, the range
12578 describes an empty scope, i.e. no instructions. */
12584 *high_return
= high
;
12588 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
12589 definition for the return value. *LOWPC and *HIGHPC are set iff
12590 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
12592 static enum pc_bounds_kind
12593 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
12594 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
12595 struct partial_symtab
*pst
)
12597 struct attribute
*attr
;
12598 struct attribute
*attr_high
;
12600 CORE_ADDR high
= 0;
12601 enum pc_bounds_kind ret
;
12603 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12606 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12609 low
= attr_value_as_address (attr
);
12610 high
= attr_value_as_address (attr_high
);
12611 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12615 /* Found high w/o low attribute. */
12616 return PC_BOUNDS_INVALID
;
12618 /* Found consecutive range of addresses. */
12619 ret
= PC_BOUNDS_HIGH_LOW
;
12623 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12626 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12627 We take advantage of the fact that DW_AT_ranges does not appear
12628 in DW_TAG_compile_unit of DWO files. */
12629 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12630 unsigned int ranges_offset
= (DW_UNSND (attr
)
12631 + (need_ranges_base
12635 /* Value of the DW_AT_ranges attribute is the offset in the
12636 .debug_ranges section. */
12637 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
12638 return PC_BOUNDS_INVALID
;
12639 /* Found discontinuous range of addresses. */
12640 ret
= PC_BOUNDS_RANGES
;
12643 return PC_BOUNDS_NOT_PRESENT
;
12646 /* read_partial_die has also the strict LOW < HIGH requirement. */
12648 return PC_BOUNDS_INVALID
;
12650 /* When using the GNU linker, .gnu.linkonce. sections are used to
12651 eliminate duplicate copies of functions and vtables and such.
12652 The linker will arbitrarily choose one and discard the others.
12653 The AT_*_pc values for such functions refer to local labels in
12654 these sections. If the section from that file was discarded, the
12655 labels are not in the output, so the relocs get a value of 0.
12656 If this is a discarded function, mark the pc bounds as invalid,
12657 so that GDB will ignore it. */
12658 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12659 return PC_BOUNDS_INVALID
;
12667 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
12668 its low and high PC addresses. Do nothing if these addresses could not
12669 be determined. Otherwise, set LOWPC to the low address if it is smaller,
12670 and HIGHPC to the high address if greater than HIGHPC. */
12673 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
12674 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12675 struct dwarf2_cu
*cu
)
12677 CORE_ADDR low
, high
;
12678 struct die_info
*child
= die
->child
;
12680 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
12682 *lowpc
= std::min (*lowpc
, low
);
12683 *highpc
= std::max (*highpc
, high
);
12686 /* If the language does not allow nested subprograms (either inside
12687 subprograms or lexical blocks), we're done. */
12688 if (cu
->language
!= language_ada
)
12691 /* Check all the children of the given DIE. If it contains nested
12692 subprograms, then check their pc bounds. Likewise, we need to
12693 check lexical blocks as well, as they may also contain subprogram
12695 while (child
&& child
->tag
)
12697 if (child
->tag
== DW_TAG_subprogram
12698 || child
->tag
== DW_TAG_lexical_block
)
12699 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
12700 child
= sibling_die (child
);
12704 /* Get the low and high pc's represented by the scope DIE, and store
12705 them in *LOWPC and *HIGHPC. If the correct values can't be
12706 determined, set *LOWPC to -1 and *HIGHPC to 0. */
12709 get_scope_pc_bounds (struct die_info
*die
,
12710 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
12711 struct dwarf2_cu
*cu
)
12713 CORE_ADDR best_low
= (CORE_ADDR
) -1;
12714 CORE_ADDR best_high
= (CORE_ADDR
) 0;
12715 CORE_ADDR current_low
, current_high
;
12717 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
12718 >= PC_BOUNDS_RANGES
)
12720 best_low
= current_low
;
12721 best_high
= current_high
;
12725 struct die_info
*child
= die
->child
;
12727 while (child
&& child
->tag
)
12729 switch (child
->tag
) {
12730 case DW_TAG_subprogram
:
12731 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
12733 case DW_TAG_namespace
:
12734 case DW_TAG_module
:
12735 /* FIXME: carlton/2004-01-16: Should we do this for
12736 DW_TAG_class_type/DW_TAG_structure_type, too? I think
12737 that current GCC's always emit the DIEs corresponding
12738 to definitions of methods of classes as children of a
12739 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
12740 the DIEs giving the declarations, which could be
12741 anywhere). But I don't see any reason why the
12742 standards says that they have to be there. */
12743 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
12745 if (current_low
!= ((CORE_ADDR
) -1))
12747 best_low
= std::min (best_low
, current_low
);
12748 best_high
= std::max (best_high
, current_high
);
12756 child
= sibling_die (child
);
12761 *highpc
= best_high
;
12764 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
12768 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
12769 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
12771 struct objfile
*objfile
= cu
->objfile
;
12772 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12773 struct attribute
*attr
;
12774 struct attribute
*attr_high
;
12776 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
12779 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
12782 CORE_ADDR low
= attr_value_as_address (attr
);
12783 CORE_ADDR high
= attr_value_as_address (attr_high
);
12785 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
12788 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
12789 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
12790 record_block_range (block
, low
, high
- 1);
12794 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
12797 bfd
*obfd
= objfile
->obfd
;
12798 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
12799 We take advantage of the fact that DW_AT_ranges does not appear
12800 in DW_TAG_compile_unit of DWO files. */
12801 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
12803 /* The value of the DW_AT_ranges attribute is the offset of the
12804 address range list in the .debug_ranges section. */
12805 unsigned long offset
= (DW_UNSND (attr
)
12806 + (need_ranges_base
? cu
->ranges_base
: 0));
12807 const gdb_byte
*buffer
;
12809 /* For some target architectures, but not others, the
12810 read_address function sign-extends the addresses it returns.
12811 To recognize base address selection entries, we need a
12813 unsigned int addr_size
= cu
->header
.addr_size
;
12814 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
12816 /* The base address, to which the next pair is relative. Note
12817 that this 'base' is a DWARF concept: most entries in a range
12818 list are relative, to reduce the number of relocs against the
12819 debugging information. This is separate from this function's
12820 'baseaddr' argument, which GDB uses to relocate debugging
12821 information from a shared library based on the address at
12822 which the library was loaded. */
12823 CORE_ADDR base
= cu
->base_address
;
12824 int base_known
= cu
->base_known
;
12826 dwarf2_ranges_process (offset
, cu
,
12827 [&] (CORE_ADDR start
, CORE_ADDR end
)
12831 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
12832 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
12833 record_block_range (block
, start
, end
- 1);
12838 /* Check whether the producer field indicates either of GCC < 4.6, or the
12839 Intel C/C++ compiler, and cache the result in CU. */
12842 check_producer (struct dwarf2_cu
*cu
)
12846 if (cu
->producer
== NULL
)
12848 /* For unknown compilers expect their behavior is DWARF version
12851 GCC started to support .debug_types sections by -gdwarf-4 since
12852 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
12853 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
12854 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
12855 interpreted incorrectly by GDB now - GCC PR debug/48229. */
12857 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
12859 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
12860 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
12862 else if (startswith (cu
->producer
, "Intel(R) C"))
12863 cu
->producer_is_icc
= 1;
12866 /* For other non-GCC compilers, expect their behavior is DWARF version
12870 cu
->checked_producer
= 1;
12873 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
12874 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
12875 during 4.6.0 experimental. */
12878 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
12880 if (!cu
->checked_producer
)
12881 check_producer (cu
);
12883 return cu
->producer_is_gxx_lt_4_6
;
12886 /* Return the default accessibility type if it is not overriden by
12887 DW_AT_accessibility. */
12889 static enum dwarf_access_attribute
12890 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
12892 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
12894 /* The default DWARF 2 accessibility for members is public, the default
12895 accessibility for inheritance is private. */
12897 if (die
->tag
!= DW_TAG_inheritance
)
12898 return DW_ACCESS_public
;
12900 return DW_ACCESS_private
;
12904 /* DWARF 3+ defines the default accessibility a different way. The same
12905 rules apply now for DW_TAG_inheritance as for the members and it only
12906 depends on the container kind. */
12908 if (die
->parent
->tag
== DW_TAG_class_type
)
12909 return DW_ACCESS_private
;
12911 return DW_ACCESS_public
;
12915 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
12916 offset. If the attribute was not found return 0, otherwise return
12917 1. If it was found but could not properly be handled, set *OFFSET
12921 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
12924 struct attribute
*attr
;
12926 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
12931 /* Note that we do not check for a section offset first here.
12932 This is because DW_AT_data_member_location is new in DWARF 4,
12933 so if we see it, we can assume that a constant form is really
12934 a constant and not a section offset. */
12935 if (attr_form_is_constant (attr
))
12936 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
12937 else if (attr_form_is_section_offset (attr
))
12938 dwarf2_complex_location_expr_complaint ();
12939 else if (attr_form_is_block (attr
))
12940 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
12942 dwarf2_complex_location_expr_complaint ();
12950 /* Add an aggregate field to the field list. */
12953 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
12954 struct dwarf2_cu
*cu
)
12956 struct objfile
*objfile
= cu
->objfile
;
12957 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12958 struct nextfield
*new_field
;
12959 struct attribute
*attr
;
12961 const char *fieldname
= "";
12963 /* Allocate a new field list entry and link it in. */
12964 new_field
= XNEW (struct nextfield
);
12965 make_cleanup (xfree
, new_field
);
12966 memset (new_field
, 0, sizeof (struct nextfield
));
12968 if (die
->tag
== DW_TAG_inheritance
)
12970 new_field
->next
= fip
->baseclasses
;
12971 fip
->baseclasses
= new_field
;
12975 new_field
->next
= fip
->fields
;
12976 fip
->fields
= new_field
;
12980 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
12982 new_field
->accessibility
= DW_UNSND (attr
);
12984 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
12985 if (new_field
->accessibility
!= DW_ACCESS_public
)
12986 fip
->non_public_fields
= 1;
12988 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
12990 new_field
->virtuality
= DW_UNSND (attr
);
12992 new_field
->virtuality
= DW_VIRTUALITY_none
;
12994 fp
= &new_field
->field
;
12996 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
13000 /* Data member other than a C++ static data member. */
13002 /* Get type of field. */
13003 fp
->type
= die_type (die
, cu
);
13005 SET_FIELD_BITPOS (*fp
, 0);
13007 /* Get bit size of field (zero if none). */
13008 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
13011 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
13015 FIELD_BITSIZE (*fp
) = 0;
13018 /* Get bit offset of field. */
13019 if (handle_data_member_location (die
, cu
, &offset
))
13020 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13021 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
13024 if (gdbarch_bits_big_endian (gdbarch
))
13026 /* For big endian bits, the DW_AT_bit_offset gives the
13027 additional bit offset from the MSB of the containing
13028 anonymous object to the MSB of the field. We don't
13029 have to do anything special since we don't need to
13030 know the size of the anonymous object. */
13031 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
13035 /* For little endian bits, compute the bit offset to the
13036 MSB of the anonymous object, subtract off the number of
13037 bits from the MSB of the field to the MSB of the
13038 object, and then subtract off the number of bits of
13039 the field itself. The result is the bit offset of
13040 the LSB of the field. */
13041 int anonymous_size
;
13042 int bit_offset
= DW_UNSND (attr
);
13044 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13047 /* The size of the anonymous object containing
13048 the bit field is explicit, so use the
13049 indicated size (in bytes). */
13050 anonymous_size
= DW_UNSND (attr
);
13054 /* The size of the anonymous object containing
13055 the bit field must be inferred from the type
13056 attribute of the data member containing the
13058 anonymous_size
= TYPE_LENGTH (fp
->type
);
13060 SET_FIELD_BITPOS (*fp
,
13061 (FIELD_BITPOS (*fp
)
13062 + anonymous_size
* bits_per_byte
13063 - bit_offset
- FIELD_BITSIZE (*fp
)));
13066 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
13068 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
13069 + dwarf2_get_attr_constant_value (attr
, 0)));
13071 /* Get name of field. */
13072 fieldname
= dwarf2_name (die
, cu
);
13073 if (fieldname
== NULL
)
13076 /* The name is already allocated along with this objfile, so we don't
13077 need to duplicate it for the type. */
13078 fp
->name
= fieldname
;
13080 /* Change accessibility for artificial fields (e.g. virtual table
13081 pointer or virtual base class pointer) to private. */
13082 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
13084 FIELD_ARTIFICIAL (*fp
) = 1;
13085 new_field
->accessibility
= DW_ACCESS_private
;
13086 fip
->non_public_fields
= 1;
13089 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
13091 /* C++ static member. */
13093 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
13094 is a declaration, but all versions of G++ as of this writing
13095 (so through at least 3.2.1) incorrectly generate
13096 DW_TAG_variable tags. */
13098 const char *physname
;
13100 /* Get name of field. */
13101 fieldname
= dwarf2_name (die
, cu
);
13102 if (fieldname
== NULL
)
13105 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
13107 /* Only create a symbol if this is an external value.
13108 new_symbol checks this and puts the value in the global symbol
13109 table, which we want. If it is not external, new_symbol
13110 will try to put the value in cu->list_in_scope which is wrong. */
13111 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
13113 /* A static const member, not much different than an enum as far as
13114 we're concerned, except that we can support more types. */
13115 new_symbol (die
, NULL
, cu
);
13118 /* Get physical name. */
13119 physname
= dwarf2_physname (fieldname
, die
, cu
);
13121 /* The name is already allocated along with this objfile, so we don't
13122 need to duplicate it for the type. */
13123 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
13124 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13125 FIELD_NAME (*fp
) = fieldname
;
13127 else if (die
->tag
== DW_TAG_inheritance
)
13131 /* C++ base class field. */
13132 if (handle_data_member_location (die
, cu
, &offset
))
13133 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
13134 FIELD_BITSIZE (*fp
) = 0;
13135 FIELD_TYPE (*fp
) = die_type (die
, cu
);
13136 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
13137 fip
->nbaseclasses
++;
13141 /* Add a typedef defined in the scope of the FIP's class. */
13144 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
13145 struct dwarf2_cu
*cu
)
13147 struct typedef_field_list
*new_field
;
13148 struct typedef_field
*fp
;
13150 /* Allocate a new field list entry and link it in. */
13151 new_field
= XCNEW (struct typedef_field_list
);
13152 make_cleanup (xfree
, new_field
);
13154 gdb_assert (die
->tag
== DW_TAG_typedef
);
13156 fp
= &new_field
->field
;
13158 /* Get name of field. */
13159 fp
->name
= dwarf2_name (die
, cu
);
13160 if (fp
->name
== NULL
)
13163 fp
->type
= read_type_die (die
, cu
);
13165 new_field
->next
= fip
->typedef_field_list
;
13166 fip
->typedef_field_list
= new_field
;
13167 fip
->typedef_field_list_count
++;
13170 /* Create the vector of fields, and attach it to the type. */
13173 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
13174 struct dwarf2_cu
*cu
)
13176 int nfields
= fip
->nfields
;
13178 /* Record the field count, allocate space for the array of fields,
13179 and create blank accessibility bitfields if necessary. */
13180 TYPE_NFIELDS (type
) = nfields
;
13181 TYPE_FIELDS (type
) = (struct field
*)
13182 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
13183 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
13185 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
13187 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13189 TYPE_FIELD_PRIVATE_BITS (type
) =
13190 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13191 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
13193 TYPE_FIELD_PROTECTED_BITS (type
) =
13194 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13195 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
13197 TYPE_FIELD_IGNORE_BITS (type
) =
13198 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
13199 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
13202 /* If the type has baseclasses, allocate and clear a bit vector for
13203 TYPE_FIELD_VIRTUAL_BITS. */
13204 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
13206 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
13207 unsigned char *pointer
;
13209 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13210 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
13211 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
13212 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
13213 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
13216 /* Copy the saved-up fields into the field vector. Start from the head of
13217 the list, adding to the tail of the field array, so that they end up in
13218 the same order in the array in which they were added to the list. */
13219 while (nfields
-- > 0)
13221 struct nextfield
*fieldp
;
13225 fieldp
= fip
->fields
;
13226 fip
->fields
= fieldp
->next
;
13230 fieldp
= fip
->baseclasses
;
13231 fip
->baseclasses
= fieldp
->next
;
13234 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
13235 switch (fieldp
->accessibility
)
13237 case DW_ACCESS_private
:
13238 if (cu
->language
!= language_ada
)
13239 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
13242 case DW_ACCESS_protected
:
13243 if (cu
->language
!= language_ada
)
13244 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
13247 case DW_ACCESS_public
:
13251 /* Unknown accessibility. Complain and treat it as public. */
13253 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
13254 fieldp
->accessibility
);
13258 if (nfields
< fip
->nbaseclasses
)
13260 switch (fieldp
->virtuality
)
13262 case DW_VIRTUALITY_virtual
:
13263 case DW_VIRTUALITY_pure_virtual
:
13264 if (cu
->language
== language_ada
)
13265 error (_("unexpected virtuality in component of Ada type"));
13266 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
13273 /* Return true if this member function is a constructor, false
13277 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
13279 const char *fieldname
;
13280 const char *type_name
;
13283 if (die
->parent
== NULL
)
13286 if (die
->parent
->tag
!= DW_TAG_structure_type
13287 && die
->parent
->tag
!= DW_TAG_union_type
13288 && die
->parent
->tag
!= DW_TAG_class_type
)
13291 fieldname
= dwarf2_name (die
, cu
);
13292 type_name
= dwarf2_name (die
->parent
, cu
);
13293 if (fieldname
== NULL
|| type_name
== NULL
)
13296 len
= strlen (fieldname
);
13297 return (strncmp (fieldname
, type_name
, len
) == 0
13298 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
13301 /* Add a member function to the proper fieldlist. */
13304 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
13305 struct type
*type
, struct dwarf2_cu
*cu
)
13307 struct objfile
*objfile
= cu
->objfile
;
13308 struct attribute
*attr
;
13309 struct fnfieldlist
*flp
;
13311 struct fn_field
*fnp
;
13312 const char *fieldname
;
13313 struct nextfnfield
*new_fnfield
;
13314 struct type
*this_type
;
13315 enum dwarf_access_attribute accessibility
;
13317 if (cu
->language
== language_ada
)
13318 error (_("unexpected member function in Ada type"));
13320 /* Get name of member function. */
13321 fieldname
= dwarf2_name (die
, cu
);
13322 if (fieldname
== NULL
)
13325 /* Look up member function name in fieldlist. */
13326 for (i
= 0; i
< fip
->nfnfields
; i
++)
13328 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
13332 /* Create new list element if necessary. */
13333 if (i
< fip
->nfnfields
)
13334 flp
= &fip
->fnfieldlists
[i
];
13337 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
13339 fip
->fnfieldlists
= (struct fnfieldlist
*)
13340 xrealloc (fip
->fnfieldlists
,
13341 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
13342 * sizeof (struct fnfieldlist
));
13343 if (fip
->nfnfields
== 0)
13344 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
13346 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
13347 flp
->name
= fieldname
;
13350 i
= fip
->nfnfields
++;
13353 /* Create a new member function field and chain it to the field list
13355 new_fnfield
= XNEW (struct nextfnfield
);
13356 make_cleanup (xfree
, new_fnfield
);
13357 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
13358 new_fnfield
->next
= flp
->head
;
13359 flp
->head
= new_fnfield
;
13362 /* Fill in the member function field info. */
13363 fnp
= &new_fnfield
->fnfield
;
13365 /* Delay processing of the physname until later. */
13366 if (cu
->language
== language_cplus
)
13368 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
13373 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
13374 fnp
->physname
= physname
? physname
: "";
13377 fnp
->type
= alloc_type (objfile
);
13378 this_type
= read_type_die (die
, cu
);
13379 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
13381 int nparams
= TYPE_NFIELDS (this_type
);
13383 /* TYPE is the domain of this method, and THIS_TYPE is the type
13384 of the method itself (TYPE_CODE_METHOD). */
13385 smash_to_method_type (fnp
->type
, type
,
13386 TYPE_TARGET_TYPE (this_type
),
13387 TYPE_FIELDS (this_type
),
13388 TYPE_NFIELDS (this_type
),
13389 TYPE_VARARGS (this_type
));
13391 /* Handle static member functions.
13392 Dwarf2 has no clean way to discern C++ static and non-static
13393 member functions. G++ helps GDB by marking the first
13394 parameter for non-static member functions (which is the this
13395 pointer) as artificial. We obtain this information from
13396 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
13397 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
13398 fnp
->voffset
= VOFFSET_STATIC
;
13401 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
13402 dwarf2_full_name (fieldname
, die
, cu
));
13404 /* Get fcontext from DW_AT_containing_type if present. */
13405 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13406 fnp
->fcontext
= die_containing_type (die
, cu
);
13408 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
13409 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
13411 /* Get accessibility. */
13412 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
13414 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
13416 accessibility
= dwarf2_default_access_attribute (die
, cu
);
13417 switch (accessibility
)
13419 case DW_ACCESS_private
:
13420 fnp
->is_private
= 1;
13422 case DW_ACCESS_protected
:
13423 fnp
->is_protected
= 1;
13427 /* Check for artificial methods. */
13428 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
13429 if (attr
&& DW_UNSND (attr
) != 0)
13430 fnp
->is_artificial
= 1;
13432 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
13434 /* Get index in virtual function table if it is a virtual member
13435 function. For older versions of GCC, this is an offset in the
13436 appropriate virtual table, as specified by DW_AT_containing_type.
13437 For everyone else, it is an expression to be evaluated relative
13438 to the object address. */
13440 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
13443 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
13445 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
13447 /* Old-style GCC. */
13448 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
13450 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
13451 || (DW_BLOCK (attr
)->size
> 1
13452 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
13453 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
13455 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
13456 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
13457 dwarf2_complex_location_expr_complaint ();
13459 fnp
->voffset
/= cu
->header
.addr_size
;
13463 dwarf2_complex_location_expr_complaint ();
13465 if (!fnp
->fcontext
)
13467 /* If there is no `this' field and no DW_AT_containing_type,
13468 we cannot actually find a base class context for the
13470 if (TYPE_NFIELDS (this_type
) == 0
13471 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
13473 complaint (&symfile_complaints
,
13474 _("cannot determine context for virtual member "
13475 "function \"%s\" (offset %d)"),
13476 fieldname
, to_underlying (die
->sect_off
));
13481 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
13485 else if (attr_form_is_section_offset (attr
))
13487 dwarf2_complex_location_expr_complaint ();
13491 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
13497 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
13498 if (attr
&& DW_UNSND (attr
))
13500 /* GCC does this, as of 2008-08-25; PR debug/37237. */
13501 complaint (&symfile_complaints
,
13502 _("Member function \"%s\" (offset %d) is virtual "
13503 "but the vtable offset is not specified"),
13504 fieldname
, to_underlying (die
->sect_off
));
13505 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13506 TYPE_CPLUS_DYNAMIC (type
) = 1;
13511 /* Create the vector of member function fields, and attach it to the type. */
13514 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
13515 struct dwarf2_cu
*cu
)
13517 struct fnfieldlist
*flp
;
13520 if (cu
->language
== language_ada
)
13521 error (_("unexpected member functions in Ada type"));
13523 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13524 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
13525 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
13527 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
13529 struct nextfnfield
*nfp
= flp
->head
;
13530 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
13533 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
13534 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
13535 fn_flp
->fn_fields
= (struct fn_field
*)
13536 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
13537 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
13538 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
13541 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
13544 /* Returns non-zero if NAME is the name of a vtable member in CU's
13545 language, zero otherwise. */
13547 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
13549 static const char vptr
[] = "_vptr";
13550 static const char vtable
[] = "vtable";
13552 /* Look for the C++ form of the vtable. */
13553 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
13559 /* GCC outputs unnamed structures that are really pointers to member
13560 functions, with the ABI-specified layout. If TYPE describes
13561 such a structure, smash it into a member function type.
13563 GCC shouldn't do this; it should just output pointer to member DIEs.
13564 This is GCC PR debug/28767. */
13567 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
13569 struct type
*pfn_type
, *self_type
, *new_type
;
13571 /* Check for a structure with no name and two children. */
13572 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
13575 /* Check for __pfn and __delta members. */
13576 if (TYPE_FIELD_NAME (type
, 0) == NULL
13577 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
13578 || TYPE_FIELD_NAME (type
, 1) == NULL
13579 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
13582 /* Find the type of the method. */
13583 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
13584 if (pfn_type
== NULL
13585 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
13586 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
13589 /* Look for the "this" argument. */
13590 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
13591 if (TYPE_NFIELDS (pfn_type
) == 0
13592 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
13593 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
13596 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
13597 new_type
= alloc_type (objfile
);
13598 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
13599 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
13600 TYPE_VARARGS (pfn_type
));
13601 smash_to_methodptr_type (type
, new_type
);
13604 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
13608 producer_is_icc (struct dwarf2_cu
*cu
)
13610 if (!cu
->checked_producer
)
13611 check_producer (cu
);
13613 return cu
->producer_is_icc
;
13616 /* Called when we find the DIE that starts a structure or union scope
13617 (definition) to create a type for the structure or union. Fill in
13618 the type's name and general properties; the members will not be
13619 processed until process_structure_scope. A symbol table entry for
13620 the type will also not be done until process_structure_scope (assuming
13621 the type has a name).
13623 NOTE: we need to call these functions regardless of whether or not the
13624 DIE has a DW_AT_name attribute, since it might be an anonymous
13625 structure or union. This gets the type entered into our set of
13626 user defined types. */
13628 static struct type
*
13629 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13631 struct objfile
*objfile
= cu
->objfile
;
13633 struct attribute
*attr
;
13636 /* If the definition of this type lives in .debug_types, read that type.
13637 Don't follow DW_AT_specification though, that will take us back up
13638 the chain and we want to go down. */
13639 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
13642 type
= get_DW_AT_signature_type (die
, attr
, cu
);
13644 /* The type's CU may not be the same as CU.
13645 Ensure TYPE is recorded with CU in die_type_hash. */
13646 return set_die_type (die
, type
, cu
);
13649 type
= alloc_type (objfile
);
13650 INIT_CPLUS_SPECIFIC (type
);
13652 name
= dwarf2_name (die
, cu
);
13655 if (cu
->language
== language_cplus
13656 || cu
->language
== language_d
13657 || cu
->language
== language_rust
)
13659 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
13661 /* dwarf2_full_name might have already finished building the DIE's
13662 type. If so, there is no need to continue. */
13663 if (get_die_type (die
, cu
) != NULL
)
13664 return get_die_type (die
, cu
);
13666 TYPE_TAG_NAME (type
) = full_name
;
13667 if (die
->tag
== DW_TAG_structure_type
13668 || die
->tag
== DW_TAG_class_type
)
13669 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13673 /* The name is already allocated along with this objfile, so
13674 we don't need to duplicate it for the type. */
13675 TYPE_TAG_NAME (type
) = name
;
13676 if (die
->tag
== DW_TAG_class_type
)
13677 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
13681 if (die
->tag
== DW_TAG_structure_type
)
13683 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13685 else if (die
->tag
== DW_TAG_union_type
)
13687 TYPE_CODE (type
) = TYPE_CODE_UNION
;
13691 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
13694 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
13695 TYPE_DECLARED_CLASS (type
) = 1;
13697 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
13700 if (attr_form_is_constant (attr
))
13701 TYPE_LENGTH (type
) = DW_UNSND (attr
);
13704 /* For the moment, dynamic type sizes are not supported
13705 by GDB's struct type. The actual size is determined
13706 on-demand when resolving the type of a given object,
13707 so set the type's length to zero for now. Otherwise,
13708 we record an expression as the length, and that expression
13709 could lead to a very large value, which could eventually
13710 lead to us trying to allocate that much memory when creating
13711 a value of that type. */
13712 TYPE_LENGTH (type
) = 0;
13717 TYPE_LENGTH (type
) = 0;
13720 if (producer_is_icc (cu
) && (TYPE_LENGTH (type
) == 0))
13722 /* ICC does not output the required DW_AT_declaration
13723 on incomplete types, but gives them a size of zero. */
13724 TYPE_STUB (type
) = 1;
13727 TYPE_STUB_SUPPORTED (type
) = 1;
13729 if (die_is_declaration (die
, cu
))
13730 TYPE_STUB (type
) = 1;
13731 else if (attr
== NULL
&& die
->child
== NULL
13732 && producer_is_realview (cu
->producer
))
13733 /* RealView does not output the required DW_AT_declaration
13734 on incomplete types. */
13735 TYPE_STUB (type
) = 1;
13737 /* We need to add the type field to the die immediately so we don't
13738 infinitely recurse when dealing with pointers to the structure
13739 type within the structure itself. */
13740 set_die_type (die
, type
, cu
);
13742 /* set_die_type should be already done. */
13743 set_descriptive_type (type
, die
, cu
);
13748 /* Finish creating a structure or union type, including filling in
13749 its members and creating a symbol for it. */
13752 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13754 struct objfile
*objfile
= cu
->objfile
;
13755 struct die_info
*child_die
;
13758 type
= get_die_type (die
, cu
);
13760 type
= read_structure_type (die
, cu
);
13762 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
13764 struct field_info fi
;
13765 VEC (symbolp
) *template_args
= NULL
;
13766 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
13768 memset (&fi
, 0, sizeof (struct field_info
));
13770 child_die
= die
->child
;
13772 while (child_die
&& child_die
->tag
)
13774 if (child_die
->tag
== DW_TAG_member
13775 || child_die
->tag
== DW_TAG_variable
)
13777 /* NOTE: carlton/2002-11-05: A C++ static data member
13778 should be a DW_TAG_member that is a declaration, but
13779 all versions of G++ as of this writing (so through at
13780 least 3.2.1) incorrectly generate DW_TAG_variable
13781 tags for them instead. */
13782 dwarf2_add_field (&fi
, child_die
, cu
);
13784 else if (child_die
->tag
== DW_TAG_subprogram
)
13786 /* Rust doesn't have member functions in the C++ sense.
13787 However, it does emit ordinary functions as children
13788 of a struct DIE. */
13789 if (cu
->language
== language_rust
)
13790 read_func_scope (child_die
, cu
);
13793 /* C++ member function. */
13794 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
13797 else if (child_die
->tag
== DW_TAG_inheritance
)
13799 /* C++ base class field. */
13800 dwarf2_add_field (&fi
, child_die
, cu
);
13802 else if (child_die
->tag
== DW_TAG_typedef
)
13803 dwarf2_add_typedef (&fi
, child_die
, cu
);
13804 else if (child_die
->tag
== DW_TAG_template_type_param
13805 || child_die
->tag
== DW_TAG_template_value_param
)
13807 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13810 VEC_safe_push (symbolp
, template_args
, arg
);
13813 child_die
= sibling_die (child_die
);
13816 /* Attach template arguments to type. */
13817 if (! VEC_empty (symbolp
, template_args
))
13819 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13820 TYPE_N_TEMPLATE_ARGUMENTS (type
)
13821 = VEC_length (symbolp
, template_args
);
13822 TYPE_TEMPLATE_ARGUMENTS (type
)
13823 = XOBNEWVEC (&objfile
->objfile_obstack
,
13825 TYPE_N_TEMPLATE_ARGUMENTS (type
));
13826 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
13827 VEC_address (symbolp
, template_args
),
13828 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
13829 * sizeof (struct symbol
*)));
13830 VEC_free (symbolp
, template_args
);
13833 /* Attach fields and member functions to the type. */
13835 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
13838 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
13840 /* Get the type which refers to the base class (possibly this
13841 class itself) which contains the vtable pointer for the current
13842 class from the DW_AT_containing_type attribute. This use of
13843 DW_AT_containing_type is a GNU extension. */
13845 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
13847 struct type
*t
= die_containing_type (die
, cu
);
13849 set_type_vptr_basetype (type
, t
);
13854 /* Our own class provides vtbl ptr. */
13855 for (i
= TYPE_NFIELDS (t
) - 1;
13856 i
>= TYPE_N_BASECLASSES (t
);
13859 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
13861 if (is_vtable_name (fieldname
, cu
))
13863 set_type_vptr_fieldno (type
, i
);
13868 /* Complain if virtual function table field not found. */
13869 if (i
< TYPE_N_BASECLASSES (t
))
13870 complaint (&symfile_complaints
,
13871 _("virtual function table pointer "
13872 "not found when defining class '%s'"),
13873 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
13878 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
13881 else if (cu
->producer
13882 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
13884 /* The IBM XLC compiler does not provide direct indication
13885 of the containing type, but the vtable pointer is
13886 always named __vfp. */
13890 for (i
= TYPE_NFIELDS (type
) - 1;
13891 i
>= TYPE_N_BASECLASSES (type
);
13894 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
13896 set_type_vptr_fieldno (type
, i
);
13897 set_type_vptr_basetype (type
, type
);
13904 /* Copy fi.typedef_field_list linked list elements content into the
13905 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
13906 if (fi
.typedef_field_list
)
13908 int i
= fi
.typedef_field_list_count
;
13910 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
13911 TYPE_TYPEDEF_FIELD_ARRAY (type
)
13912 = ((struct typedef_field
*)
13913 TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
));
13914 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
13916 /* Reverse the list order to keep the debug info elements order. */
13919 struct typedef_field
*dest
, *src
;
13921 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
13922 src
= &fi
.typedef_field_list
->field
;
13923 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
13928 do_cleanups (back_to
);
13931 quirk_gcc_member_function_pointer (type
, objfile
);
13933 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
13934 snapshots) has been known to create a die giving a declaration
13935 for a class that has, as a child, a die giving a definition for a
13936 nested class. So we have to process our children even if the
13937 current die is a declaration. Normally, of course, a declaration
13938 won't have any children at all. */
13940 child_die
= die
->child
;
13942 while (child_die
!= NULL
&& child_die
->tag
)
13944 if (child_die
->tag
== DW_TAG_member
13945 || child_die
->tag
== DW_TAG_variable
13946 || child_die
->tag
== DW_TAG_inheritance
13947 || child_die
->tag
== DW_TAG_template_value_param
13948 || child_die
->tag
== DW_TAG_template_type_param
)
13953 process_die (child_die
, cu
);
13955 child_die
= sibling_die (child_die
);
13958 /* Do not consider external references. According to the DWARF standard,
13959 these DIEs are identified by the fact that they have no byte_size
13960 attribute, and a declaration attribute. */
13961 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
13962 || !die_is_declaration (die
, cu
))
13963 new_symbol (die
, type
, cu
);
13966 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
13967 update TYPE using some information only available in DIE's children. */
13970 update_enumeration_type_from_children (struct die_info
*die
,
13972 struct dwarf2_cu
*cu
)
13974 struct die_info
*child_die
;
13975 int unsigned_enum
= 1;
13979 auto_obstack obstack
;
13981 for (child_die
= die
->child
;
13982 child_die
!= NULL
&& child_die
->tag
;
13983 child_die
= sibling_die (child_die
))
13985 struct attribute
*attr
;
13987 const gdb_byte
*bytes
;
13988 struct dwarf2_locexpr_baton
*baton
;
13991 if (child_die
->tag
!= DW_TAG_enumerator
)
13994 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
13998 name
= dwarf2_name (child_die
, cu
);
14000 name
= "<anonymous enumerator>";
14002 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
14003 &value
, &bytes
, &baton
);
14009 else if ((mask
& value
) != 0)
14014 /* If we already know that the enum type is neither unsigned, nor
14015 a flag type, no need to look at the rest of the enumerates. */
14016 if (!unsigned_enum
&& !flag_enum
)
14021 TYPE_UNSIGNED (type
) = 1;
14023 TYPE_FLAG_ENUM (type
) = 1;
14026 /* Given a DW_AT_enumeration_type die, set its type. We do not
14027 complete the type's fields yet, or create any symbols. */
14029 static struct type
*
14030 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14032 struct objfile
*objfile
= cu
->objfile
;
14034 struct attribute
*attr
;
14037 /* If the definition of this type lives in .debug_types, read that type.
14038 Don't follow DW_AT_specification though, that will take us back up
14039 the chain and we want to go down. */
14040 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
14043 type
= get_DW_AT_signature_type (die
, attr
, cu
);
14045 /* The type's CU may not be the same as CU.
14046 Ensure TYPE is recorded with CU in die_type_hash. */
14047 return set_die_type (die
, type
, cu
);
14050 type
= alloc_type (objfile
);
14052 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
14053 name
= dwarf2_full_name (NULL
, die
, cu
);
14055 TYPE_TAG_NAME (type
) = name
;
14057 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14060 struct type
*underlying_type
= die_type (die
, cu
);
14062 TYPE_TARGET_TYPE (type
) = underlying_type
;
14065 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14068 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14072 TYPE_LENGTH (type
) = 0;
14075 /* The enumeration DIE can be incomplete. In Ada, any type can be
14076 declared as private in the package spec, and then defined only
14077 inside the package body. Such types are known as Taft Amendment
14078 Types. When another package uses such a type, an incomplete DIE
14079 may be generated by the compiler. */
14080 if (die_is_declaration (die
, cu
))
14081 TYPE_STUB (type
) = 1;
14083 /* Finish the creation of this type by using the enum's children.
14084 We must call this even when the underlying type has been provided
14085 so that we can determine if we're looking at a "flag" enum. */
14086 update_enumeration_type_from_children (die
, type
, cu
);
14088 /* If this type has an underlying type that is not a stub, then we
14089 may use its attributes. We always use the "unsigned" attribute
14090 in this situation, because ordinarily we guess whether the type
14091 is unsigned -- but the guess can be wrong and the underlying type
14092 can tell us the reality. However, we defer to a local size
14093 attribute if one exists, because this lets the compiler override
14094 the underlying type if needed. */
14095 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
14097 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
14098 if (TYPE_LENGTH (type
) == 0)
14099 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
14102 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
14104 return set_die_type (die
, type
, cu
);
14107 /* Given a pointer to a die which begins an enumeration, process all
14108 the dies that define the members of the enumeration, and create the
14109 symbol for the enumeration type.
14111 NOTE: We reverse the order of the element list. */
14114 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
14116 struct type
*this_type
;
14118 this_type
= get_die_type (die
, cu
);
14119 if (this_type
== NULL
)
14120 this_type
= read_enumeration_type (die
, cu
);
14122 if (die
->child
!= NULL
)
14124 struct die_info
*child_die
;
14125 struct symbol
*sym
;
14126 struct field
*fields
= NULL
;
14127 int num_fields
= 0;
14130 child_die
= die
->child
;
14131 while (child_die
&& child_die
->tag
)
14133 if (child_die
->tag
!= DW_TAG_enumerator
)
14135 process_die (child_die
, cu
);
14139 name
= dwarf2_name (child_die
, cu
);
14142 sym
= new_symbol (child_die
, this_type
, cu
);
14144 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
14146 fields
= (struct field
*)
14148 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
14149 * sizeof (struct field
));
14152 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
14153 FIELD_TYPE (fields
[num_fields
]) = NULL
;
14154 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
14155 FIELD_BITSIZE (fields
[num_fields
]) = 0;
14161 child_die
= sibling_die (child_die
);
14166 TYPE_NFIELDS (this_type
) = num_fields
;
14167 TYPE_FIELDS (this_type
) = (struct field
*)
14168 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
14169 memcpy (TYPE_FIELDS (this_type
), fields
,
14170 sizeof (struct field
) * num_fields
);
14175 /* If we are reading an enum from a .debug_types unit, and the enum
14176 is a declaration, and the enum is not the signatured type in the
14177 unit, then we do not want to add a symbol for it. Adding a
14178 symbol would in some cases obscure the true definition of the
14179 enum, giving users an incomplete type when the definition is
14180 actually available. Note that we do not want to do this for all
14181 enums which are just declarations, because C++0x allows forward
14182 enum declarations. */
14183 if (cu
->per_cu
->is_debug_types
14184 && die_is_declaration (die
, cu
))
14186 struct signatured_type
*sig_type
;
14188 sig_type
= (struct signatured_type
*) cu
->per_cu
;
14189 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
14190 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
14194 new_symbol (die
, this_type
, cu
);
14197 /* Extract all information from a DW_TAG_array_type DIE and put it in
14198 the DIE's type field. For now, this only handles one dimensional
14201 static struct type
*
14202 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14204 struct objfile
*objfile
= cu
->objfile
;
14205 struct die_info
*child_die
;
14207 struct type
*element_type
, *range_type
, *index_type
;
14208 struct type
**range_types
= NULL
;
14209 struct attribute
*attr
;
14211 struct cleanup
*back_to
;
14213 unsigned int bit_stride
= 0;
14215 element_type
= die_type (die
, cu
);
14217 /* The die_type call above may have already set the type for this DIE. */
14218 type
= get_die_type (die
, cu
);
14222 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
14224 bit_stride
= DW_UNSND (attr
) * 8;
14226 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
14228 bit_stride
= DW_UNSND (attr
);
14230 /* Irix 6.2 native cc creates array types without children for
14231 arrays with unspecified length. */
14232 if (die
->child
== NULL
)
14234 index_type
= objfile_type (objfile
)->builtin_int
;
14235 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
14236 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
14238 return set_die_type (die
, type
, cu
);
14241 back_to
= make_cleanup (null_cleanup
, NULL
);
14242 child_die
= die
->child
;
14243 while (child_die
&& child_die
->tag
)
14245 if (child_die
->tag
== DW_TAG_subrange_type
)
14247 struct type
*child_type
= read_type_die (child_die
, cu
);
14249 if (child_type
!= NULL
)
14251 /* The range type was succesfully read. Save it for the
14252 array type creation. */
14253 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
14255 range_types
= (struct type
**)
14256 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
14257 * sizeof (struct type
*));
14259 make_cleanup (free_current_contents
, &range_types
);
14261 range_types
[ndim
++] = child_type
;
14264 child_die
= sibling_die (child_die
);
14267 /* Dwarf2 dimensions are output from left to right, create the
14268 necessary array types in backwards order. */
14270 type
= element_type
;
14272 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
14277 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
14283 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
14287 /* Understand Dwarf2 support for vector types (like they occur on
14288 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
14289 array type. This is not part of the Dwarf2/3 standard yet, but a
14290 custom vendor extension. The main difference between a regular
14291 array and the vector variant is that vectors are passed by value
14293 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
14295 make_vector_type (type
);
14297 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
14298 implementation may choose to implement triple vectors using this
14300 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14303 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
14304 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14306 complaint (&symfile_complaints
,
14307 _("DW_AT_byte_size for array type smaller "
14308 "than the total size of elements"));
14311 name
= dwarf2_name (die
, cu
);
14313 TYPE_NAME (type
) = name
;
14315 /* Install the type in the die. */
14316 set_die_type (die
, type
, cu
);
14318 /* set_die_type should be already done. */
14319 set_descriptive_type (type
, die
, cu
);
14321 do_cleanups (back_to
);
14326 static enum dwarf_array_dim_ordering
14327 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
14329 struct attribute
*attr
;
14331 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
14334 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
14336 /* GNU F77 is a special case, as at 08/2004 array type info is the
14337 opposite order to the dwarf2 specification, but data is still
14338 laid out as per normal fortran.
14340 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
14341 version checking. */
14343 if (cu
->language
== language_fortran
14344 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
14346 return DW_ORD_row_major
;
14349 switch (cu
->language_defn
->la_array_ordering
)
14351 case array_column_major
:
14352 return DW_ORD_col_major
;
14353 case array_row_major
:
14355 return DW_ORD_row_major
;
14359 /* Extract all information from a DW_TAG_set_type DIE and put it in
14360 the DIE's type field. */
14362 static struct type
*
14363 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14365 struct type
*domain_type
, *set_type
;
14366 struct attribute
*attr
;
14368 domain_type
= die_type (die
, cu
);
14370 /* The die_type call above may have already set the type for this DIE. */
14371 set_type
= get_die_type (die
, cu
);
14375 set_type
= create_set_type (NULL
, domain_type
);
14377 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14379 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
14381 return set_die_type (die
, set_type
, cu
);
14384 /* A helper for read_common_block that creates a locexpr baton.
14385 SYM is the symbol which we are marking as computed.
14386 COMMON_DIE is the DIE for the common block.
14387 COMMON_LOC is the location expression attribute for the common
14389 MEMBER_LOC is the location expression attribute for the particular
14390 member of the common block that we are processing.
14391 CU is the CU from which the above come. */
14394 mark_common_block_symbol_computed (struct symbol
*sym
,
14395 struct die_info
*common_die
,
14396 struct attribute
*common_loc
,
14397 struct attribute
*member_loc
,
14398 struct dwarf2_cu
*cu
)
14400 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14401 struct dwarf2_locexpr_baton
*baton
;
14403 unsigned int cu_off
;
14404 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
14405 LONGEST offset
= 0;
14407 gdb_assert (common_loc
&& member_loc
);
14408 gdb_assert (attr_form_is_block (common_loc
));
14409 gdb_assert (attr_form_is_block (member_loc
)
14410 || attr_form_is_constant (member_loc
));
14412 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14413 baton
->per_cu
= cu
->per_cu
;
14414 gdb_assert (baton
->per_cu
);
14416 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
14418 if (attr_form_is_constant (member_loc
))
14420 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
14421 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
14424 baton
->size
+= DW_BLOCK (member_loc
)->size
;
14426 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
14429 *ptr
++ = DW_OP_call4
;
14430 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
14431 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
14434 if (attr_form_is_constant (member_loc
))
14436 *ptr
++ = DW_OP_addr
;
14437 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
14438 ptr
+= cu
->header
.addr_size
;
14442 /* We have to copy the data here, because DW_OP_call4 will only
14443 use a DW_AT_location attribute. */
14444 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
14445 ptr
+= DW_BLOCK (member_loc
)->size
;
14448 *ptr
++ = DW_OP_plus
;
14449 gdb_assert (ptr
- baton
->data
== baton
->size
);
14451 SYMBOL_LOCATION_BATON (sym
) = baton
;
14452 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
14455 /* Create appropriate locally-scoped variables for all the
14456 DW_TAG_common_block entries. Also create a struct common_block
14457 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
14458 is used to sepate the common blocks name namespace from regular
14462 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
14464 struct attribute
*attr
;
14466 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14469 /* Support the .debug_loc offsets. */
14470 if (attr_form_is_block (attr
))
14474 else if (attr_form_is_section_offset (attr
))
14476 dwarf2_complex_location_expr_complaint ();
14481 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
14482 "common block member");
14487 if (die
->child
!= NULL
)
14489 struct objfile
*objfile
= cu
->objfile
;
14490 struct die_info
*child_die
;
14491 size_t n_entries
= 0, size
;
14492 struct common_block
*common_block
;
14493 struct symbol
*sym
;
14495 for (child_die
= die
->child
;
14496 child_die
&& child_die
->tag
;
14497 child_die
= sibling_die (child_die
))
14500 size
= (sizeof (struct common_block
)
14501 + (n_entries
- 1) * sizeof (struct symbol
*));
14503 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
14505 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
14506 common_block
->n_entries
= 0;
14508 for (child_die
= die
->child
;
14509 child_die
&& child_die
->tag
;
14510 child_die
= sibling_die (child_die
))
14512 /* Create the symbol in the DW_TAG_common_block block in the current
14514 sym
= new_symbol (child_die
, NULL
, cu
);
14517 struct attribute
*member_loc
;
14519 common_block
->contents
[common_block
->n_entries
++] = sym
;
14521 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
14525 /* GDB has handled this for a long time, but it is
14526 not specified by DWARF. It seems to have been
14527 emitted by gfortran at least as recently as:
14528 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
14529 complaint (&symfile_complaints
,
14530 _("Variable in common block has "
14531 "DW_AT_data_member_location "
14532 "- DIE at 0x%x [in module %s]"),
14533 to_underlying (child_die
->sect_off
),
14534 objfile_name (cu
->objfile
));
14536 if (attr_form_is_section_offset (member_loc
))
14537 dwarf2_complex_location_expr_complaint ();
14538 else if (attr_form_is_constant (member_loc
)
14539 || attr_form_is_block (member_loc
))
14542 mark_common_block_symbol_computed (sym
, die
, attr
,
14546 dwarf2_complex_location_expr_complaint ();
14551 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
14552 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
14556 /* Create a type for a C++ namespace. */
14558 static struct type
*
14559 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14561 struct objfile
*objfile
= cu
->objfile
;
14562 const char *previous_prefix
, *name
;
14566 /* For extensions, reuse the type of the original namespace. */
14567 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
14569 struct die_info
*ext_die
;
14570 struct dwarf2_cu
*ext_cu
= cu
;
14572 ext_die
= dwarf2_extension (die
, &ext_cu
);
14573 type
= read_type_die (ext_die
, ext_cu
);
14575 /* EXT_CU may not be the same as CU.
14576 Ensure TYPE is recorded with CU in die_type_hash. */
14577 return set_die_type (die
, type
, cu
);
14580 name
= namespace_name (die
, &is_anonymous
, cu
);
14582 /* Now build the name of the current namespace. */
14584 previous_prefix
= determine_prefix (die
, cu
);
14585 if (previous_prefix
[0] != '\0')
14586 name
= typename_concat (&objfile
->objfile_obstack
,
14587 previous_prefix
, name
, 0, cu
);
14589 /* Create the type. */
14590 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
14591 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14593 return set_die_type (die
, type
, cu
);
14596 /* Read a namespace scope. */
14599 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
14601 struct objfile
*objfile
= cu
->objfile
;
14604 /* Add a symbol associated to this if we haven't seen the namespace
14605 before. Also, add a using directive if it's an anonymous
14608 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
14612 type
= read_type_die (die
, cu
);
14613 new_symbol (die
, type
, cu
);
14615 namespace_name (die
, &is_anonymous
, cu
);
14618 const char *previous_prefix
= determine_prefix (die
, cu
);
14620 add_using_directive (using_directives (cu
->language
),
14621 previous_prefix
, TYPE_NAME (type
), NULL
,
14622 NULL
, NULL
, 0, &objfile
->objfile_obstack
);
14626 if (die
->child
!= NULL
)
14628 struct die_info
*child_die
= die
->child
;
14630 while (child_die
&& child_die
->tag
)
14632 process_die (child_die
, cu
);
14633 child_die
= sibling_die (child_die
);
14638 /* Read a Fortran module as type. This DIE can be only a declaration used for
14639 imported module. Still we need that type as local Fortran "use ... only"
14640 declaration imports depend on the created type in determine_prefix. */
14642 static struct type
*
14643 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14645 struct objfile
*objfile
= cu
->objfile
;
14646 const char *module_name
;
14649 module_name
= dwarf2_name (die
, cu
);
14651 complaint (&symfile_complaints
,
14652 _("DW_TAG_module has no name, offset 0x%x"),
14653 to_underlying (die
->sect_off
));
14654 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
14656 /* determine_prefix uses TYPE_TAG_NAME. */
14657 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
14659 return set_die_type (die
, type
, cu
);
14662 /* Read a Fortran module. */
14665 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
14667 struct die_info
*child_die
= die
->child
;
14670 type
= read_type_die (die
, cu
);
14671 new_symbol (die
, type
, cu
);
14673 while (child_die
&& child_die
->tag
)
14675 process_die (child_die
, cu
);
14676 child_die
= sibling_die (child_die
);
14680 /* Return the name of the namespace represented by DIE. Set
14681 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
14684 static const char *
14685 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
14687 struct die_info
*current_die
;
14688 const char *name
= NULL
;
14690 /* Loop through the extensions until we find a name. */
14692 for (current_die
= die
;
14693 current_die
!= NULL
;
14694 current_die
= dwarf2_extension (die
, &cu
))
14696 /* We don't use dwarf2_name here so that we can detect the absence
14697 of a name -> anonymous namespace. */
14698 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
14704 /* Is it an anonymous namespace? */
14706 *is_anonymous
= (name
== NULL
);
14708 name
= CP_ANONYMOUS_NAMESPACE_STR
;
14713 /* Extract all information from a DW_TAG_pointer_type DIE and add to
14714 the user defined type vector. */
14716 static struct type
*
14717 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14719 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
14720 struct comp_unit_head
*cu_header
= &cu
->header
;
14722 struct attribute
*attr_byte_size
;
14723 struct attribute
*attr_address_class
;
14724 int byte_size
, addr_class
;
14725 struct type
*target_type
;
14727 target_type
= die_type (die
, cu
);
14729 /* The die_type call above may have already set the type for this DIE. */
14730 type
= get_die_type (die
, cu
);
14734 type
= lookup_pointer_type (target_type
);
14736 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14737 if (attr_byte_size
)
14738 byte_size
= DW_UNSND (attr_byte_size
);
14740 byte_size
= cu_header
->addr_size
;
14742 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
14743 if (attr_address_class
)
14744 addr_class
= DW_UNSND (attr_address_class
);
14746 addr_class
= DW_ADDR_none
;
14748 /* If the pointer size or address class is different than the
14749 default, create a type variant marked as such and set the
14750 length accordingly. */
14751 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
14753 if (gdbarch_address_class_type_flags_p (gdbarch
))
14757 type_flags
= gdbarch_address_class_type_flags
14758 (gdbarch
, byte_size
, addr_class
);
14759 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
14761 type
= make_type_with_address_space (type
, type_flags
);
14763 else if (TYPE_LENGTH (type
) != byte_size
)
14765 complaint (&symfile_complaints
,
14766 _("invalid pointer size %d"), byte_size
);
14770 /* Should we also complain about unhandled address classes? */
14774 TYPE_LENGTH (type
) = byte_size
;
14775 return set_die_type (die
, type
, cu
);
14778 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
14779 the user defined type vector. */
14781 static struct type
*
14782 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14785 struct type
*to_type
;
14786 struct type
*domain
;
14788 to_type
= die_type (die
, cu
);
14789 domain
= die_containing_type (die
, cu
);
14791 /* The calls above may have already set the type for this DIE. */
14792 type
= get_die_type (die
, cu
);
14796 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
14797 type
= lookup_methodptr_type (to_type
);
14798 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
14800 struct type
*new_type
= alloc_type (cu
->objfile
);
14802 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
14803 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
14804 TYPE_VARARGS (to_type
));
14805 type
= lookup_methodptr_type (new_type
);
14808 type
= lookup_memberptr_type (to_type
, domain
);
14810 return set_die_type (die
, type
, cu
);
14813 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
14814 the user defined type vector. */
14816 static struct type
*
14817 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14818 enum type_code refcode
)
14820 struct comp_unit_head
*cu_header
= &cu
->header
;
14821 struct type
*type
, *target_type
;
14822 struct attribute
*attr
;
14824 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
14826 target_type
= die_type (die
, cu
);
14828 /* The die_type call above may have already set the type for this DIE. */
14829 type
= get_die_type (die
, cu
);
14833 type
= lookup_reference_type (target_type
, refcode
);
14834 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14837 TYPE_LENGTH (type
) = DW_UNSND (attr
);
14841 TYPE_LENGTH (type
) = cu_header
->addr_size
;
14843 return set_die_type (die
, type
, cu
);
14846 /* Add the given cv-qualifiers to the element type of the array. GCC
14847 outputs DWARF type qualifiers that apply to an array, not the
14848 element type. But GDB relies on the array element type to carry
14849 the cv-qualifiers. This mimics section 6.7.3 of the C99
14852 static struct type
*
14853 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
14854 struct type
*base_type
, int cnst
, int voltl
)
14856 struct type
*el_type
, *inner_array
;
14858 base_type
= copy_type (base_type
);
14859 inner_array
= base_type
;
14861 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
14863 TYPE_TARGET_TYPE (inner_array
) =
14864 copy_type (TYPE_TARGET_TYPE (inner_array
));
14865 inner_array
= TYPE_TARGET_TYPE (inner_array
);
14868 el_type
= TYPE_TARGET_TYPE (inner_array
);
14869 cnst
|= TYPE_CONST (el_type
);
14870 voltl
|= TYPE_VOLATILE (el_type
);
14871 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
14873 return set_die_type (die
, base_type
, cu
);
14876 static struct type
*
14877 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14879 struct type
*base_type
, *cv_type
;
14881 base_type
= die_type (die
, cu
);
14883 /* The die_type call above may have already set the type for this DIE. */
14884 cv_type
= get_die_type (die
, cu
);
14888 /* In case the const qualifier is applied to an array type, the element type
14889 is so qualified, not the array type (section 6.7.3 of C99). */
14890 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14891 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
14893 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
14894 return set_die_type (die
, cv_type
, cu
);
14897 static struct type
*
14898 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14900 struct type
*base_type
, *cv_type
;
14902 base_type
= die_type (die
, cu
);
14904 /* The die_type call above may have already set the type for this DIE. */
14905 cv_type
= get_die_type (die
, cu
);
14909 /* In case the volatile qualifier is applied to an array type, the
14910 element type is so qualified, not the array type (section 6.7.3
14912 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
14913 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
14915 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
14916 return set_die_type (die
, cv_type
, cu
);
14919 /* Handle DW_TAG_restrict_type. */
14921 static struct type
*
14922 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14924 struct type
*base_type
, *cv_type
;
14926 base_type
= die_type (die
, cu
);
14928 /* The die_type call above may have already set the type for this DIE. */
14929 cv_type
= get_die_type (die
, cu
);
14933 cv_type
= make_restrict_type (base_type
);
14934 return set_die_type (die
, cv_type
, cu
);
14937 /* Handle DW_TAG_atomic_type. */
14939 static struct type
*
14940 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14942 struct type
*base_type
, *cv_type
;
14944 base_type
= die_type (die
, cu
);
14946 /* The die_type call above may have already set the type for this DIE. */
14947 cv_type
= get_die_type (die
, cu
);
14951 cv_type
= make_atomic_type (base_type
);
14952 return set_die_type (die
, cv_type
, cu
);
14955 /* Extract all information from a DW_TAG_string_type DIE and add to
14956 the user defined type vector. It isn't really a user defined type,
14957 but it behaves like one, with other DIE's using an AT_user_def_type
14958 attribute to reference it. */
14960 static struct type
*
14961 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14963 struct objfile
*objfile
= cu
->objfile
;
14964 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14965 struct type
*type
, *range_type
, *index_type
, *char_type
;
14966 struct attribute
*attr
;
14967 unsigned int length
;
14969 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
14972 length
= DW_UNSND (attr
);
14976 /* Check for the DW_AT_byte_size attribute. */
14977 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14980 length
= DW_UNSND (attr
);
14988 index_type
= objfile_type (objfile
)->builtin_int
;
14989 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
14990 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
14991 type
= create_string_type (NULL
, char_type
, range_type
);
14993 return set_die_type (die
, type
, cu
);
14996 /* Assuming that DIE corresponds to a function, returns nonzero
14997 if the function is prototyped. */
15000 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
15002 struct attribute
*attr
;
15004 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
15005 if (attr
&& (DW_UNSND (attr
) != 0))
15008 /* The DWARF standard implies that the DW_AT_prototyped attribute
15009 is only meaninful for C, but the concept also extends to other
15010 languages that allow unprototyped functions (Eg: Objective C).
15011 For all other languages, assume that functions are always
15013 if (cu
->language
!= language_c
15014 && cu
->language
!= language_objc
15015 && cu
->language
!= language_opencl
)
15018 /* RealView does not emit DW_AT_prototyped. We can not distinguish
15019 prototyped and unprototyped functions; default to prototyped,
15020 since that is more common in modern code (and RealView warns
15021 about unprototyped functions). */
15022 if (producer_is_realview (cu
->producer
))
15028 /* Handle DIES due to C code like:
15032 int (*funcp)(int a, long l);
15036 ('funcp' generates a DW_TAG_subroutine_type DIE). */
15038 static struct type
*
15039 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15041 struct objfile
*objfile
= cu
->objfile
;
15042 struct type
*type
; /* Type that this function returns. */
15043 struct type
*ftype
; /* Function that returns above type. */
15044 struct attribute
*attr
;
15046 type
= die_type (die
, cu
);
15048 /* The die_type call above may have already set the type for this DIE. */
15049 ftype
= get_die_type (die
, cu
);
15053 ftype
= lookup_function_type (type
);
15055 if (prototyped_function_p (die
, cu
))
15056 TYPE_PROTOTYPED (ftype
) = 1;
15058 /* Store the calling convention in the type if it's available in
15059 the subroutine die. Otherwise set the calling convention to
15060 the default value DW_CC_normal. */
15061 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15063 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
15064 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
15065 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
15067 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
15069 /* Record whether the function returns normally to its caller or not
15070 if the DWARF producer set that information. */
15071 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
15072 if (attr
&& (DW_UNSND (attr
) != 0))
15073 TYPE_NO_RETURN (ftype
) = 1;
15075 /* We need to add the subroutine type to the die immediately so
15076 we don't infinitely recurse when dealing with parameters
15077 declared as the same subroutine type. */
15078 set_die_type (die
, ftype
, cu
);
15080 if (die
->child
!= NULL
)
15082 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
15083 struct die_info
*child_die
;
15084 int nparams
, iparams
;
15086 /* Count the number of parameters.
15087 FIXME: GDB currently ignores vararg functions, but knows about
15088 vararg member functions. */
15090 child_die
= die
->child
;
15091 while (child_die
&& child_die
->tag
)
15093 if (child_die
->tag
== DW_TAG_formal_parameter
)
15095 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
15096 TYPE_VARARGS (ftype
) = 1;
15097 child_die
= sibling_die (child_die
);
15100 /* Allocate storage for parameters and fill them in. */
15101 TYPE_NFIELDS (ftype
) = nparams
;
15102 TYPE_FIELDS (ftype
) = (struct field
*)
15103 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
15105 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
15106 even if we error out during the parameters reading below. */
15107 for (iparams
= 0; iparams
< nparams
; iparams
++)
15108 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
15111 child_die
= die
->child
;
15112 while (child_die
&& child_die
->tag
)
15114 if (child_die
->tag
== DW_TAG_formal_parameter
)
15116 struct type
*arg_type
;
15118 /* DWARF version 2 has no clean way to discern C++
15119 static and non-static member functions. G++ helps
15120 GDB by marking the first parameter for non-static
15121 member functions (which is the this pointer) as
15122 artificial. We pass this information to
15123 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
15125 DWARF version 3 added DW_AT_object_pointer, which GCC
15126 4.5 does not yet generate. */
15127 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
15129 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
15131 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
15132 arg_type
= die_type (child_die
, cu
);
15134 /* RealView does not mark THIS as const, which the testsuite
15135 expects. GCC marks THIS as const in method definitions,
15136 but not in the class specifications (GCC PR 43053). */
15137 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
15138 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
15141 struct dwarf2_cu
*arg_cu
= cu
;
15142 const char *name
= dwarf2_name (child_die
, cu
);
15144 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
15147 /* If the compiler emits this, use it. */
15148 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
15151 else if (name
&& strcmp (name
, "this") == 0)
15152 /* Function definitions will have the argument names. */
15154 else if (name
== NULL
&& iparams
== 0)
15155 /* Declarations may not have the names, so like
15156 elsewhere in GDB, assume an artificial first
15157 argument is "this". */
15161 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
15165 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
15168 child_die
= sibling_die (child_die
);
15175 static struct type
*
15176 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
15178 struct objfile
*objfile
= cu
->objfile
;
15179 const char *name
= NULL
;
15180 struct type
*this_type
, *target_type
;
15182 name
= dwarf2_full_name (NULL
, die
, cu
);
15183 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
15184 TYPE_TARGET_STUB (this_type
) = 1;
15185 set_die_type (die
, this_type
, cu
);
15186 target_type
= die_type (die
, cu
);
15187 if (target_type
!= this_type
)
15188 TYPE_TARGET_TYPE (this_type
) = target_type
;
15191 /* Self-referential typedefs are, it seems, not allowed by the DWARF
15192 spec and cause infinite loops in GDB. */
15193 complaint (&symfile_complaints
,
15194 _("Self-referential DW_TAG_typedef "
15195 "- DIE at 0x%x [in module %s]"),
15196 to_underlying (die
->sect_off
), objfile_name (objfile
));
15197 TYPE_TARGET_TYPE (this_type
) = NULL
;
15202 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
15203 (which may be different from NAME) to the architecture back-end to allow
15204 it to guess the correct format if necessary. */
15206 static struct type
*
15207 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
15208 const char *name_hint
)
15210 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15211 const struct floatformat
**format
;
15214 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
15216 type
= init_float_type (objfile
, bits
, name
, format
);
15218 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
/ TARGET_CHAR_BIT
, name
);
15223 /* Find a representation of a given base type and install
15224 it in the TYPE field of the die. */
15226 static struct type
*
15227 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15229 struct objfile
*objfile
= cu
->objfile
;
15231 struct attribute
*attr
;
15232 int encoding
= 0, bits
= 0;
15235 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
15238 encoding
= DW_UNSND (attr
);
15240 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15243 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
15245 name
= dwarf2_name (die
, cu
);
15248 complaint (&symfile_complaints
,
15249 _("DW_AT_name missing from DW_TAG_base_type"));
15254 case DW_ATE_address
:
15255 /* Turn DW_ATE_address into a void * pointer. */
15256 type
= init_type (objfile
, TYPE_CODE_VOID
, 1, NULL
);
15257 type
= init_pointer_type (objfile
, bits
, name
, type
);
15259 case DW_ATE_boolean
:
15260 type
= init_boolean_type (objfile
, bits
, 1, name
);
15262 case DW_ATE_complex_float
:
15263 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
15264 type
= init_complex_type (objfile
, name
, type
);
15266 case DW_ATE_decimal_float
:
15267 type
= init_decfloat_type (objfile
, bits
, name
);
15270 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
15272 case DW_ATE_signed
:
15273 type
= init_integer_type (objfile
, bits
, 0, name
);
15275 case DW_ATE_unsigned
:
15276 if (cu
->language
== language_fortran
15278 && startswith (name
, "character("))
15279 type
= init_character_type (objfile
, bits
, 1, name
);
15281 type
= init_integer_type (objfile
, bits
, 1, name
);
15283 case DW_ATE_signed_char
:
15284 if (cu
->language
== language_ada
|| cu
->language
== language_m2
15285 || cu
->language
== language_pascal
15286 || cu
->language
== language_fortran
)
15287 type
= init_character_type (objfile
, bits
, 0, name
);
15289 type
= init_integer_type (objfile
, bits
, 0, name
);
15291 case DW_ATE_unsigned_char
:
15292 if (cu
->language
== language_ada
|| cu
->language
== language_m2
15293 || cu
->language
== language_pascal
15294 || cu
->language
== language_fortran
15295 || cu
->language
== language_rust
)
15296 type
= init_character_type (objfile
, bits
, 1, name
);
15298 type
= init_integer_type (objfile
, bits
, 1, name
);
15302 gdbarch
*arch
= get_objfile_arch (objfile
);
15305 type
= builtin_type (arch
)->builtin_char16
;
15306 else if (bits
== 32)
15307 type
= builtin_type (arch
)->builtin_char32
;
15310 complaint (&symfile_complaints
,
15311 _("unsupported DW_ATE_UTF bit size: '%d'"),
15313 type
= init_integer_type (objfile
, bits
, 1, name
);
15315 return set_die_type (die
, type
, cu
);
15320 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
15321 dwarf_type_encoding_name (encoding
));
15322 type
= init_type (objfile
, TYPE_CODE_ERROR
,
15323 bits
/ TARGET_CHAR_BIT
, name
);
15327 if (name
&& strcmp (name
, "char") == 0)
15328 TYPE_NOSIGN (type
) = 1;
15330 return set_die_type (die
, type
, cu
);
15333 /* Parse dwarf attribute if it's a block, reference or constant and put the
15334 resulting value of the attribute into struct bound_prop.
15335 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
15338 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
15339 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
15341 struct dwarf2_property_baton
*baton
;
15342 struct obstack
*obstack
= &cu
->objfile
->objfile_obstack
;
15344 if (attr
== NULL
|| prop
== NULL
)
15347 if (attr_form_is_block (attr
))
15349 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15350 baton
->referenced_type
= NULL
;
15351 baton
->locexpr
.per_cu
= cu
->per_cu
;
15352 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
15353 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
15354 prop
->data
.baton
= baton
;
15355 prop
->kind
= PROP_LOCEXPR
;
15356 gdb_assert (prop
->data
.baton
!= NULL
);
15358 else if (attr_form_is_ref (attr
))
15360 struct dwarf2_cu
*target_cu
= cu
;
15361 struct die_info
*target_die
;
15362 struct attribute
*target_attr
;
15364 target_die
= follow_die_ref (die
, attr
, &target_cu
);
15365 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
15366 if (target_attr
== NULL
)
15367 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
15369 if (target_attr
== NULL
)
15372 switch (target_attr
->name
)
15374 case DW_AT_location
:
15375 if (attr_form_is_section_offset (target_attr
))
15377 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15378 baton
->referenced_type
= die_type (target_die
, target_cu
);
15379 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
15380 prop
->data
.baton
= baton
;
15381 prop
->kind
= PROP_LOCLIST
;
15382 gdb_assert (prop
->data
.baton
!= NULL
);
15384 else if (attr_form_is_block (target_attr
))
15386 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15387 baton
->referenced_type
= die_type (target_die
, target_cu
);
15388 baton
->locexpr
.per_cu
= cu
->per_cu
;
15389 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
15390 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
15391 prop
->data
.baton
= baton
;
15392 prop
->kind
= PROP_LOCEXPR
;
15393 gdb_assert (prop
->data
.baton
!= NULL
);
15397 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
15398 "dynamic property");
15402 case DW_AT_data_member_location
:
15406 if (!handle_data_member_location (target_die
, target_cu
,
15410 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
15411 baton
->referenced_type
= read_type_die (target_die
->parent
,
15413 baton
->offset_info
.offset
= offset
;
15414 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
15415 prop
->data
.baton
= baton
;
15416 prop
->kind
= PROP_ADDR_OFFSET
;
15421 else if (attr_form_is_constant (attr
))
15423 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
15424 prop
->kind
= PROP_CONST
;
15428 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
15429 dwarf2_name (die
, cu
));
15436 /* Read the given DW_AT_subrange DIE. */
15438 static struct type
*
15439 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15441 struct type
*base_type
, *orig_base_type
;
15442 struct type
*range_type
;
15443 struct attribute
*attr
;
15444 struct dynamic_prop low
, high
;
15445 int low_default_is_valid
;
15446 int high_bound_is_count
= 0;
15448 LONGEST negative_mask
;
15450 orig_base_type
= die_type (die
, cu
);
15451 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
15452 whereas the real type might be. So, we use ORIG_BASE_TYPE when
15453 creating the range type, but we use the result of check_typedef
15454 when examining properties of the type. */
15455 base_type
= check_typedef (orig_base_type
);
15457 /* The die_type call above may have already set the type for this DIE. */
15458 range_type
= get_die_type (die
, cu
);
15462 low
.kind
= PROP_CONST
;
15463 high
.kind
= PROP_CONST
;
15464 high
.data
.const_val
= 0;
15466 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
15467 omitting DW_AT_lower_bound. */
15468 switch (cu
->language
)
15471 case language_cplus
:
15472 low
.data
.const_val
= 0;
15473 low_default_is_valid
= 1;
15475 case language_fortran
:
15476 low
.data
.const_val
= 1;
15477 low_default_is_valid
= 1;
15480 case language_objc
:
15481 case language_rust
:
15482 low
.data
.const_val
= 0;
15483 low_default_is_valid
= (cu
->header
.version
>= 4);
15487 case language_pascal
:
15488 low
.data
.const_val
= 1;
15489 low_default_is_valid
= (cu
->header
.version
>= 4);
15492 low
.data
.const_val
= 0;
15493 low_default_is_valid
= 0;
15497 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
15499 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
15500 else if (!low_default_is_valid
)
15501 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
15502 "- DIE at 0x%x [in module %s]"),
15503 to_underlying (die
->sect_off
), objfile_name (cu
->objfile
));
15505 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
15506 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15508 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
15509 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
15511 /* If bounds are constant do the final calculation here. */
15512 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
15513 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
15515 high_bound_is_count
= 1;
15519 /* Dwarf-2 specifications explicitly allows to create subrange types
15520 without specifying a base type.
15521 In that case, the base type must be set to the type of
15522 the lower bound, upper bound or count, in that order, if any of these
15523 three attributes references an object that has a type.
15524 If no base type is found, the Dwarf-2 specifications say that
15525 a signed integer type of size equal to the size of an address should
15527 For the following C code: `extern char gdb_int [];'
15528 GCC produces an empty range DIE.
15529 FIXME: muller/2010-05-28: Possible references to object for low bound,
15530 high bound or count are not yet handled by this code. */
15531 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
15533 struct objfile
*objfile
= cu
->objfile
;
15534 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15535 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
15536 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
15538 /* Test "int", "long int", and "long long int" objfile types,
15539 and select the first one having a size above or equal to the
15540 architecture address size. */
15541 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15542 base_type
= int_type
;
15545 int_type
= objfile_type (objfile
)->builtin_long
;
15546 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15547 base_type
= int_type
;
15550 int_type
= objfile_type (objfile
)->builtin_long_long
;
15551 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
15552 base_type
= int_type
;
15557 /* Normally, the DWARF producers are expected to use a signed
15558 constant form (Eg. DW_FORM_sdata) to express negative bounds.
15559 But this is unfortunately not always the case, as witnessed
15560 with GCC, for instance, where the ambiguous DW_FORM_dataN form
15561 is used instead. To work around that ambiguity, we treat
15562 the bounds as signed, and thus sign-extend their values, when
15563 the base type is signed. */
15565 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
15566 if (low
.kind
== PROP_CONST
15567 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
15568 low
.data
.const_val
|= negative_mask
;
15569 if (high
.kind
== PROP_CONST
15570 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
15571 high
.data
.const_val
|= negative_mask
;
15573 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
15575 if (high_bound_is_count
)
15576 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
15578 /* Ada expects an empty array on no boundary attributes. */
15579 if (attr
== NULL
&& cu
->language
!= language_ada
)
15580 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
15582 name
= dwarf2_name (die
, cu
);
15584 TYPE_NAME (range_type
) = name
;
15586 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15588 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
15590 set_die_type (die
, range_type
, cu
);
15592 /* set_die_type should be already done. */
15593 set_descriptive_type (range_type
, die
, cu
);
15598 static struct type
*
15599 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15603 /* For now, we only support the C meaning of an unspecified type: void. */
15605 type
= init_type (cu
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
15606 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
15608 return set_die_type (die
, type
, cu
);
15611 /* Read a single die and all its descendents. Set the die's sibling
15612 field to NULL; set other fields in the die correctly, and set all
15613 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
15614 location of the info_ptr after reading all of those dies. PARENT
15615 is the parent of the die in question. */
15617 static struct die_info
*
15618 read_die_and_children (const struct die_reader_specs
*reader
,
15619 const gdb_byte
*info_ptr
,
15620 const gdb_byte
**new_info_ptr
,
15621 struct die_info
*parent
)
15623 struct die_info
*die
;
15624 const gdb_byte
*cur_ptr
;
15627 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
15630 *new_info_ptr
= cur_ptr
;
15633 store_in_ref_table (die
, reader
->cu
);
15636 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
15640 *new_info_ptr
= cur_ptr
;
15643 die
->sibling
= NULL
;
15644 die
->parent
= parent
;
15648 /* Read a die, all of its descendents, and all of its siblings; set
15649 all of the fields of all of the dies correctly. Arguments are as
15650 in read_die_and_children. */
15652 static struct die_info
*
15653 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
15654 const gdb_byte
*info_ptr
,
15655 const gdb_byte
**new_info_ptr
,
15656 struct die_info
*parent
)
15658 struct die_info
*first_die
, *last_sibling
;
15659 const gdb_byte
*cur_ptr
;
15661 cur_ptr
= info_ptr
;
15662 first_die
= last_sibling
= NULL
;
15666 struct die_info
*die
15667 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
15671 *new_info_ptr
= cur_ptr
;
15678 last_sibling
->sibling
= die
;
15680 last_sibling
= die
;
15684 /* Read a die, all of its descendents, and all of its siblings; set
15685 all of the fields of all of the dies correctly. Arguments are as
15686 in read_die_and_children.
15687 This the main entry point for reading a DIE and all its children. */
15689 static struct die_info
*
15690 read_die_and_siblings (const struct die_reader_specs
*reader
,
15691 const gdb_byte
*info_ptr
,
15692 const gdb_byte
**new_info_ptr
,
15693 struct die_info
*parent
)
15695 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
15696 new_info_ptr
, parent
);
15698 if (dwarf_die_debug
)
15700 fprintf_unfiltered (gdb_stdlog
,
15701 "Read die from %s@0x%x of %s:\n",
15702 get_section_name (reader
->die_section
),
15703 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15704 bfd_get_filename (reader
->abfd
));
15705 dump_die (die
, dwarf_die_debug
);
15711 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
15713 The caller is responsible for filling in the extra attributes
15714 and updating (*DIEP)->num_attrs.
15715 Set DIEP to point to a newly allocated die with its information,
15716 except for its child, sibling, and parent fields.
15717 Set HAS_CHILDREN to tell whether the die has children or not. */
15719 static const gdb_byte
*
15720 read_full_die_1 (const struct die_reader_specs
*reader
,
15721 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15722 int *has_children
, int num_extra_attrs
)
15724 unsigned int abbrev_number
, bytes_read
, i
;
15725 struct abbrev_info
*abbrev
;
15726 struct die_info
*die
;
15727 struct dwarf2_cu
*cu
= reader
->cu
;
15728 bfd
*abfd
= reader
->abfd
;
15730 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
15731 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
15732 info_ptr
+= bytes_read
;
15733 if (!abbrev_number
)
15740 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
15742 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
15744 bfd_get_filename (abfd
));
15746 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
15747 die
->sect_off
= sect_off
;
15748 die
->tag
= abbrev
->tag
;
15749 die
->abbrev
= abbrev_number
;
15751 /* Make the result usable.
15752 The caller needs to update num_attrs after adding the extra
15754 die
->num_attrs
= abbrev
->num_attrs
;
15756 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
15757 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
15761 *has_children
= abbrev
->has_children
;
15765 /* Read a die and all its attributes.
15766 Set DIEP to point to a newly allocated die with its information,
15767 except for its child, sibling, and parent fields.
15768 Set HAS_CHILDREN to tell whether the die has children or not. */
15770 static const gdb_byte
*
15771 read_full_die (const struct die_reader_specs
*reader
,
15772 struct die_info
**diep
, const gdb_byte
*info_ptr
,
15775 const gdb_byte
*result
;
15777 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
15779 if (dwarf_die_debug
)
15781 fprintf_unfiltered (gdb_stdlog
,
15782 "Read die from %s@0x%x of %s:\n",
15783 get_section_name (reader
->die_section
),
15784 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
15785 bfd_get_filename (reader
->abfd
));
15786 dump_die (*diep
, dwarf_die_debug
);
15792 /* Abbreviation tables.
15794 In DWARF version 2, the description of the debugging information is
15795 stored in a separate .debug_abbrev section. Before we read any
15796 dies from a section we read in all abbreviations and install them
15797 in a hash table. */
15799 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
15801 static struct abbrev_info
*
15802 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
15804 struct abbrev_info
*abbrev
;
15806 abbrev
= XOBNEW (&abbrev_table
->abbrev_obstack
, struct abbrev_info
);
15807 memset (abbrev
, 0, sizeof (struct abbrev_info
));
15812 /* Add an abbreviation to the table. */
15815 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
15816 unsigned int abbrev_number
,
15817 struct abbrev_info
*abbrev
)
15819 unsigned int hash_number
;
15821 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15822 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
15823 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
15826 /* Look up an abbrev in the table.
15827 Returns NULL if the abbrev is not found. */
15829 static struct abbrev_info
*
15830 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
15831 unsigned int abbrev_number
)
15833 unsigned int hash_number
;
15834 struct abbrev_info
*abbrev
;
15836 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
15837 abbrev
= abbrev_table
->abbrevs
[hash_number
];
15841 if (abbrev
->number
== abbrev_number
)
15843 abbrev
= abbrev
->next
;
15848 /* Read in an abbrev table. */
15850 static struct abbrev_table
*
15851 abbrev_table_read_table (struct dwarf2_section_info
*section
,
15852 sect_offset sect_off
)
15854 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15855 bfd
*abfd
= get_section_bfd_owner (section
);
15856 struct abbrev_table
*abbrev_table
;
15857 const gdb_byte
*abbrev_ptr
;
15858 struct abbrev_info
*cur_abbrev
;
15859 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
15860 unsigned int abbrev_form
;
15861 struct attr_abbrev
*cur_attrs
;
15862 unsigned int allocated_attrs
;
15864 abbrev_table
= XNEW (struct abbrev_table
);
15865 abbrev_table
->sect_off
= sect_off
;
15866 obstack_init (&abbrev_table
->abbrev_obstack
);
15867 abbrev_table
->abbrevs
=
15868 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct abbrev_info
*,
15870 memset (abbrev_table
->abbrevs
, 0,
15871 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
15873 dwarf2_read_section (objfile
, section
);
15874 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
15875 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15876 abbrev_ptr
+= bytes_read
;
15878 allocated_attrs
= ATTR_ALLOC_CHUNK
;
15879 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
15881 /* Loop until we reach an abbrev number of 0. */
15882 while (abbrev_number
)
15884 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
15886 /* read in abbrev header */
15887 cur_abbrev
->number
= abbrev_number
;
15889 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15890 abbrev_ptr
+= bytes_read
;
15891 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
15894 /* now read in declarations */
15897 LONGEST implicit_const
;
15899 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15900 abbrev_ptr
+= bytes_read
;
15901 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15902 abbrev_ptr
+= bytes_read
;
15903 if (abbrev_form
== DW_FORM_implicit_const
)
15905 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
15907 abbrev_ptr
+= bytes_read
;
15911 /* Initialize it due to a false compiler warning. */
15912 implicit_const
= -1;
15915 if (abbrev_name
== 0)
15918 if (cur_abbrev
->num_attrs
== allocated_attrs
)
15920 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
15922 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
15925 cur_attrs
[cur_abbrev
->num_attrs
].name
15926 = (enum dwarf_attribute
) abbrev_name
;
15927 cur_attrs
[cur_abbrev
->num_attrs
].form
15928 = (enum dwarf_form
) abbrev_form
;
15929 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
15930 ++cur_abbrev
->num_attrs
;
15933 cur_abbrev
->attrs
=
15934 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
15935 cur_abbrev
->num_attrs
);
15936 memcpy (cur_abbrev
->attrs
, cur_attrs
,
15937 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
15939 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
15941 /* Get next abbreviation.
15942 Under Irix6 the abbreviations for a compilation unit are not
15943 always properly terminated with an abbrev number of 0.
15944 Exit loop if we encounter an abbreviation which we have
15945 already read (which means we are about to read the abbreviations
15946 for the next compile unit) or if the end of the abbreviation
15947 table is reached. */
15948 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
15950 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
15951 abbrev_ptr
+= bytes_read
;
15952 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
15957 return abbrev_table
;
15960 /* Free the resources held by ABBREV_TABLE. */
15963 abbrev_table_free (struct abbrev_table
*abbrev_table
)
15965 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
15966 xfree (abbrev_table
);
15969 /* Same as abbrev_table_free but as a cleanup.
15970 We pass in a pointer to the pointer to the table so that we can
15971 set the pointer to NULL when we're done. It also simplifies
15972 build_type_psymtabs_1. */
15975 abbrev_table_free_cleanup (void *table_ptr
)
15977 struct abbrev_table
**abbrev_table_ptr
= (struct abbrev_table
**) table_ptr
;
15979 if (*abbrev_table_ptr
!= NULL
)
15980 abbrev_table_free (*abbrev_table_ptr
);
15981 *abbrev_table_ptr
= NULL
;
15984 /* Read the abbrev table for CU from ABBREV_SECTION. */
15987 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
15988 struct dwarf2_section_info
*abbrev_section
)
15991 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_sect_off
);
15994 /* Release the memory used by the abbrev table for a compilation unit. */
15997 dwarf2_free_abbrev_table (void *ptr_to_cu
)
15999 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr_to_cu
;
16001 if (cu
->abbrev_table
!= NULL
)
16002 abbrev_table_free (cu
->abbrev_table
);
16003 /* Set this to NULL so that we SEGV if we try to read it later,
16004 and also because free_comp_unit verifies this is NULL. */
16005 cu
->abbrev_table
= NULL
;
16008 /* Returns nonzero if TAG represents a type that we might generate a partial
16012 is_type_tag_for_partial (int tag
)
16017 /* Some types that would be reasonable to generate partial symbols for,
16018 that we don't at present. */
16019 case DW_TAG_array_type
:
16020 case DW_TAG_file_type
:
16021 case DW_TAG_ptr_to_member_type
:
16022 case DW_TAG_set_type
:
16023 case DW_TAG_string_type
:
16024 case DW_TAG_subroutine_type
:
16026 case DW_TAG_base_type
:
16027 case DW_TAG_class_type
:
16028 case DW_TAG_interface_type
:
16029 case DW_TAG_enumeration_type
:
16030 case DW_TAG_structure_type
:
16031 case DW_TAG_subrange_type
:
16032 case DW_TAG_typedef
:
16033 case DW_TAG_union_type
:
16040 /* Load all DIEs that are interesting for partial symbols into memory. */
16042 static struct partial_die_info
*
16043 load_partial_dies (const struct die_reader_specs
*reader
,
16044 const gdb_byte
*info_ptr
, int building_psymtab
)
16046 struct dwarf2_cu
*cu
= reader
->cu
;
16047 struct objfile
*objfile
= cu
->objfile
;
16048 struct partial_die_info
*part_die
;
16049 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
16050 struct abbrev_info
*abbrev
;
16051 unsigned int bytes_read
;
16052 unsigned int load_all
= 0;
16053 int nesting_level
= 1;
16058 gdb_assert (cu
->per_cu
!= NULL
);
16059 if (cu
->per_cu
->load_all_dies
)
16063 = htab_create_alloc_ex (cu
->header
.length
/ 12,
16067 &cu
->comp_unit_obstack
,
16068 hashtab_obstack_allocate
,
16069 dummy_obstack_deallocate
);
16071 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16075 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
16077 /* A NULL abbrev means the end of a series of children. */
16078 if (abbrev
== NULL
)
16080 if (--nesting_level
== 0)
16082 /* PART_DIE was probably the last thing allocated on the
16083 comp_unit_obstack, so we could call obstack_free
16084 here. We don't do that because the waste is small,
16085 and will be cleaned up when we're done with this
16086 compilation unit. This way, we're also more robust
16087 against other users of the comp_unit_obstack. */
16090 info_ptr
+= bytes_read
;
16091 last_die
= parent_die
;
16092 parent_die
= parent_die
->die_parent
;
16096 /* Check for template arguments. We never save these; if
16097 they're seen, we just mark the parent, and go on our way. */
16098 if (parent_die
!= NULL
16099 && cu
->language
== language_cplus
16100 && (abbrev
->tag
== DW_TAG_template_type_param
16101 || abbrev
->tag
== DW_TAG_template_value_param
))
16103 parent_die
->has_template_arguments
= 1;
16107 /* We don't need a partial DIE for the template argument. */
16108 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16113 /* We only recurse into c++ subprograms looking for template arguments.
16114 Skip their other children. */
16116 && cu
->language
== language_cplus
16117 && parent_die
!= NULL
16118 && parent_die
->tag
== DW_TAG_subprogram
)
16120 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16124 /* Check whether this DIE is interesting enough to save. Normally
16125 we would not be interested in members here, but there may be
16126 later variables referencing them via DW_AT_specification (for
16127 static members). */
16129 && !is_type_tag_for_partial (abbrev
->tag
)
16130 && abbrev
->tag
!= DW_TAG_constant
16131 && abbrev
->tag
!= DW_TAG_enumerator
16132 && abbrev
->tag
!= DW_TAG_subprogram
16133 && abbrev
->tag
!= DW_TAG_lexical_block
16134 && abbrev
->tag
!= DW_TAG_variable
16135 && abbrev
->tag
!= DW_TAG_namespace
16136 && abbrev
->tag
!= DW_TAG_module
16137 && abbrev
->tag
!= DW_TAG_member
16138 && abbrev
->tag
!= DW_TAG_imported_unit
16139 && abbrev
->tag
!= DW_TAG_imported_declaration
)
16141 /* Otherwise we skip to the next sibling, if any. */
16142 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
16146 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
16149 /* This two-pass algorithm for processing partial symbols has a
16150 high cost in cache pressure. Thus, handle some simple cases
16151 here which cover the majority of C partial symbols. DIEs
16152 which neither have specification tags in them, nor could have
16153 specification tags elsewhere pointing at them, can simply be
16154 processed and discarded.
16156 This segment is also optional; scan_partial_symbols and
16157 add_partial_symbol will handle these DIEs if we chain
16158 them in normally. When compilers which do not emit large
16159 quantities of duplicate debug information are more common,
16160 this code can probably be removed. */
16162 /* Any complete simple types at the top level (pretty much all
16163 of them, for a language without namespaces), can be processed
16165 if (parent_die
== NULL
16166 && part_die
->has_specification
== 0
16167 && part_die
->is_declaration
== 0
16168 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
16169 || part_die
->tag
== DW_TAG_base_type
16170 || part_die
->tag
== DW_TAG_subrange_type
))
16172 if (building_psymtab
&& part_die
->name
!= NULL
)
16173 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
16174 VAR_DOMAIN
, LOC_TYPEDEF
,
16175 &objfile
->static_psymbols
,
16176 0, cu
->language
, objfile
);
16177 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
16181 /* The exception for DW_TAG_typedef with has_children above is
16182 a workaround of GCC PR debug/47510. In the case of this complaint
16183 type_name_no_tag_or_error will error on such types later.
16185 GDB skipped children of DW_TAG_typedef by the shortcut above and then
16186 it could not find the child DIEs referenced later, this is checked
16187 above. In correct DWARF DW_TAG_typedef should have no children. */
16189 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
16190 complaint (&symfile_complaints
,
16191 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
16192 "- DIE at 0x%x [in module %s]"),
16193 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
16195 /* If we're at the second level, and we're an enumerator, and
16196 our parent has no specification (meaning possibly lives in a
16197 namespace elsewhere), then we can add the partial symbol now
16198 instead of queueing it. */
16199 if (part_die
->tag
== DW_TAG_enumerator
16200 && parent_die
!= NULL
16201 && parent_die
->die_parent
== NULL
16202 && parent_die
->tag
== DW_TAG_enumeration_type
16203 && parent_die
->has_specification
== 0)
16205 if (part_die
->name
== NULL
)
16206 complaint (&symfile_complaints
,
16207 _("malformed enumerator DIE ignored"));
16208 else if (building_psymtab
)
16209 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
16210 VAR_DOMAIN
, LOC_CONST
,
16211 cu
->language
== language_cplus
16212 ? &objfile
->global_psymbols
16213 : &objfile
->static_psymbols
,
16214 0, cu
->language
, objfile
);
16216 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
16220 /* We'll save this DIE so link it in. */
16221 part_die
->die_parent
= parent_die
;
16222 part_die
->die_sibling
= NULL
;
16223 part_die
->die_child
= NULL
;
16225 if (last_die
&& last_die
== parent_die
)
16226 last_die
->die_child
= part_die
;
16228 last_die
->die_sibling
= part_die
;
16230 last_die
= part_die
;
16232 if (first_die
== NULL
)
16233 first_die
= part_die
;
16235 /* Maybe add the DIE to the hash table. Not all DIEs that we
16236 find interesting need to be in the hash table, because we
16237 also have the parent/sibling/child chains; only those that we
16238 might refer to by offset later during partial symbol reading.
16240 For now this means things that might have be the target of a
16241 DW_AT_specification, DW_AT_abstract_origin, or
16242 DW_AT_extension. DW_AT_extension will refer only to
16243 namespaces; DW_AT_abstract_origin refers to functions (and
16244 many things under the function DIE, but we do not recurse
16245 into function DIEs during partial symbol reading) and
16246 possibly variables as well; DW_AT_specification refers to
16247 declarations. Declarations ought to have the DW_AT_declaration
16248 flag. It happens that GCC forgets to put it in sometimes, but
16249 only for functions, not for types.
16251 Adding more things than necessary to the hash table is harmless
16252 except for the performance cost. Adding too few will result in
16253 wasted time in find_partial_die, when we reread the compilation
16254 unit with load_all_dies set. */
16257 || abbrev
->tag
== DW_TAG_constant
16258 || abbrev
->tag
== DW_TAG_subprogram
16259 || abbrev
->tag
== DW_TAG_variable
16260 || abbrev
->tag
== DW_TAG_namespace
16261 || part_die
->is_declaration
)
16265 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
16266 to_underlying (part_die
->sect_off
),
16271 part_die
= XOBNEW (&cu
->comp_unit_obstack
, struct partial_die_info
);
16273 /* For some DIEs we want to follow their children (if any). For C
16274 we have no reason to follow the children of structures; for other
16275 languages we have to, so that we can get at method physnames
16276 to infer fully qualified class names, for DW_AT_specification,
16277 and for C++ template arguments. For C++, we also look one level
16278 inside functions to find template arguments (if the name of the
16279 function does not already contain the template arguments).
16281 For Ada, we need to scan the children of subprograms and lexical
16282 blocks as well because Ada allows the definition of nested
16283 entities that could be interesting for the debugger, such as
16284 nested subprograms for instance. */
16285 if (last_die
->has_children
16287 || last_die
->tag
== DW_TAG_namespace
16288 || last_die
->tag
== DW_TAG_module
16289 || last_die
->tag
== DW_TAG_enumeration_type
16290 || (cu
->language
== language_cplus
16291 && last_die
->tag
== DW_TAG_subprogram
16292 && (last_die
->name
== NULL
16293 || strchr (last_die
->name
, '<') == NULL
))
16294 || (cu
->language
!= language_c
16295 && (last_die
->tag
== DW_TAG_class_type
16296 || last_die
->tag
== DW_TAG_interface_type
16297 || last_die
->tag
== DW_TAG_structure_type
16298 || last_die
->tag
== DW_TAG_union_type
))
16299 || (cu
->language
== language_ada
16300 && (last_die
->tag
== DW_TAG_subprogram
16301 || last_die
->tag
== DW_TAG_lexical_block
))))
16304 parent_die
= last_die
;
16308 /* Otherwise we skip to the next sibling, if any. */
16309 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
16311 /* Back to the top, do it again. */
16315 /* Read a minimal amount of information into the minimal die structure. */
16317 static const gdb_byte
*
16318 read_partial_die (const struct die_reader_specs
*reader
,
16319 struct partial_die_info
*part_die
,
16320 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
16321 const gdb_byte
*info_ptr
)
16323 struct dwarf2_cu
*cu
= reader
->cu
;
16324 struct objfile
*objfile
= cu
->objfile
;
16325 const gdb_byte
*buffer
= reader
->buffer
;
16327 struct attribute attr
;
16328 int has_low_pc_attr
= 0;
16329 int has_high_pc_attr
= 0;
16330 int high_pc_relative
= 0;
16332 memset (part_die
, 0, sizeof (struct partial_die_info
));
16334 part_die
->sect_off
= (sect_offset
) (info_ptr
- buffer
);
16336 info_ptr
+= abbrev_len
;
16338 if (abbrev
== NULL
)
16341 part_die
->tag
= abbrev
->tag
;
16342 part_die
->has_children
= abbrev
->has_children
;
16344 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
16346 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
16348 /* Store the data if it is of an attribute we want to keep in a
16349 partial symbol table. */
16353 switch (part_die
->tag
)
16355 case DW_TAG_compile_unit
:
16356 case DW_TAG_partial_unit
:
16357 case DW_TAG_type_unit
:
16358 /* Compilation units have a DW_AT_name that is a filename, not
16359 a source language identifier. */
16360 case DW_TAG_enumeration_type
:
16361 case DW_TAG_enumerator
:
16362 /* These tags always have simple identifiers already; no need
16363 to canonicalize them. */
16364 part_die
->name
= DW_STRING (&attr
);
16368 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
16369 &objfile
->per_bfd
->storage_obstack
);
16373 case DW_AT_linkage_name
:
16374 case DW_AT_MIPS_linkage_name
:
16375 /* Note that both forms of linkage name might appear. We
16376 assume they will be the same, and we only store the last
16378 if (cu
->language
== language_ada
)
16379 part_die
->name
= DW_STRING (&attr
);
16380 part_die
->linkage_name
= DW_STRING (&attr
);
16383 has_low_pc_attr
= 1;
16384 part_die
->lowpc
= attr_value_as_address (&attr
);
16386 case DW_AT_high_pc
:
16387 has_high_pc_attr
= 1;
16388 part_die
->highpc
= attr_value_as_address (&attr
);
16389 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
16390 high_pc_relative
= 1;
16392 case DW_AT_location
:
16393 /* Support the .debug_loc offsets. */
16394 if (attr_form_is_block (&attr
))
16396 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
16398 else if (attr_form_is_section_offset (&attr
))
16400 dwarf2_complex_location_expr_complaint ();
16404 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16405 "partial symbol information");
16408 case DW_AT_external
:
16409 part_die
->is_external
= DW_UNSND (&attr
);
16411 case DW_AT_declaration
:
16412 part_die
->is_declaration
= DW_UNSND (&attr
);
16415 part_die
->has_type
= 1;
16417 case DW_AT_abstract_origin
:
16418 case DW_AT_specification
:
16419 case DW_AT_extension
:
16420 part_die
->has_specification
= 1;
16421 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
16422 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
16423 || cu
->per_cu
->is_dwz
);
16425 case DW_AT_sibling
:
16426 /* Ignore absolute siblings, they might point outside of
16427 the current compile unit. */
16428 if (attr
.form
== DW_FORM_ref_addr
)
16429 complaint (&symfile_complaints
,
16430 _("ignoring absolute DW_AT_sibling"));
16433 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
16434 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
16436 if (sibling_ptr
< info_ptr
)
16437 complaint (&symfile_complaints
,
16438 _("DW_AT_sibling points backwards"));
16439 else if (sibling_ptr
> reader
->buffer_end
)
16440 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
16442 part_die
->sibling
= sibling_ptr
;
16445 case DW_AT_byte_size
:
16446 part_die
->has_byte_size
= 1;
16448 case DW_AT_const_value
:
16449 part_die
->has_const_value
= 1;
16451 case DW_AT_calling_convention
:
16452 /* DWARF doesn't provide a way to identify a program's source-level
16453 entry point. DW_AT_calling_convention attributes are only meant
16454 to describe functions' calling conventions.
16456 However, because it's a necessary piece of information in
16457 Fortran, and before DWARF 4 DW_CC_program was the only
16458 piece of debugging information whose definition refers to
16459 a 'main program' at all, several compilers marked Fortran
16460 main programs with DW_CC_program --- even when those
16461 functions use the standard calling conventions.
16463 Although DWARF now specifies a way to provide this
16464 information, we support this practice for backward
16466 if (DW_UNSND (&attr
) == DW_CC_program
16467 && cu
->language
== language_fortran
)
16468 part_die
->main_subprogram
= 1;
16471 if (DW_UNSND (&attr
) == DW_INL_inlined
16472 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
16473 part_die
->may_be_inlined
= 1;
16477 if (part_die
->tag
== DW_TAG_imported_unit
)
16479 part_die
->d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
16480 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
16481 || cu
->per_cu
->is_dwz
);
16485 case DW_AT_main_subprogram
:
16486 part_die
->main_subprogram
= DW_UNSND (&attr
);
16494 if (high_pc_relative
)
16495 part_die
->highpc
+= part_die
->lowpc
;
16497 if (has_low_pc_attr
&& has_high_pc_attr
)
16499 /* When using the GNU linker, .gnu.linkonce. sections are used to
16500 eliminate duplicate copies of functions and vtables and such.
16501 The linker will arbitrarily choose one and discard the others.
16502 The AT_*_pc values for such functions refer to local labels in
16503 these sections. If the section from that file was discarded, the
16504 labels are not in the output, so the relocs get a value of 0.
16505 If this is a discarded function, mark the pc bounds as invalid,
16506 so that GDB will ignore it. */
16507 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
16509 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16511 complaint (&symfile_complaints
,
16512 _("DW_AT_low_pc %s is zero "
16513 "for DIE at 0x%x [in module %s]"),
16514 paddress (gdbarch
, part_die
->lowpc
),
16515 to_underlying (part_die
->sect_off
), objfile_name (objfile
));
16517 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
16518 else if (part_die
->lowpc
>= part_die
->highpc
)
16520 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16522 complaint (&symfile_complaints
,
16523 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
16524 "for DIE at 0x%x [in module %s]"),
16525 paddress (gdbarch
, part_die
->lowpc
),
16526 paddress (gdbarch
, part_die
->highpc
),
16527 to_underlying (part_die
->sect_off
),
16528 objfile_name (objfile
));
16531 part_die
->has_pc_info
= 1;
16537 /* Find a cached partial DIE at OFFSET in CU. */
16539 static struct partial_die_info
*
16540 find_partial_die_in_comp_unit (sect_offset sect_off
, struct dwarf2_cu
*cu
)
16542 struct partial_die_info
*lookup_die
= NULL
;
16543 struct partial_die_info part_die
;
16545 part_die
.sect_off
= sect_off
;
16546 lookup_die
= ((struct partial_die_info
*)
16547 htab_find_with_hash (cu
->partial_dies
, &part_die
,
16548 to_underlying (sect_off
)));
16553 /* Find a partial DIE at OFFSET, which may or may not be in CU,
16554 except in the case of .debug_types DIEs which do not reference
16555 outside their CU (they do however referencing other types via
16556 DW_FORM_ref_sig8). */
16558 static struct partial_die_info
*
16559 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
16561 struct objfile
*objfile
= cu
->objfile
;
16562 struct dwarf2_per_cu_data
*per_cu
= NULL
;
16563 struct partial_die_info
*pd
= NULL
;
16565 if (offset_in_dwz
== cu
->per_cu
->is_dwz
16566 && offset_in_cu_p (&cu
->header
, sect_off
))
16568 pd
= find_partial_die_in_comp_unit (sect_off
, cu
);
16571 /* We missed recording what we needed.
16572 Load all dies and try again. */
16573 per_cu
= cu
->per_cu
;
16577 /* TUs don't reference other CUs/TUs (except via type signatures). */
16578 if (cu
->per_cu
->is_debug_types
)
16580 error (_("Dwarf Error: Type Unit at offset 0x%x contains"
16581 " external reference to offset 0x%x [in module %s].\n"),
16582 to_underlying (cu
->header
.sect_off
), to_underlying (sect_off
),
16583 bfd_get_filename (objfile
->obfd
));
16585 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
16588 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
16589 load_partial_comp_unit (per_cu
);
16591 per_cu
->cu
->last_used
= 0;
16592 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
16595 /* If we didn't find it, and not all dies have been loaded,
16596 load them all and try again. */
16598 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
16600 per_cu
->load_all_dies
= 1;
16602 /* This is nasty. When we reread the DIEs, somewhere up the call chain
16603 THIS_CU->cu may already be in use. So we can't just free it and
16604 replace its DIEs with the ones we read in. Instead, we leave those
16605 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
16606 and clobber THIS_CU->cu->partial_dies with the hash table for the new
16608 load_partial_comp_unit (per_cu
);
16610 pd
= find_partial_die_in_comp_unit (sect_off
, per_cu
->cu
);
16614 internal_error (__FILE__
, __LINE__
,
16615 _("could not find partial DIE 0x%x "
16616 "in cache [from module %s]\n"),
16617 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
16621 /* See if we can figure out if the class lives in a namespace. We do
16622 this by looking for a member function; its demangled name will
16623 contain namespace info, if there is any. */
16626 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
16627 struct dwarf2_cu
*cu
)
16629 /* NOTE: carlton/2003-10-07: Getting the info this way changes
16630 what template types look like, because the demangler
16631 frequently doesn't give the same name as the debug info. We
16632 could fix this by only using the demangled name to get the
16633 prefix (but see comment in read_structure_type). */
16635 struct partial_die_info
*real_pdi
;
16636 struct partial_die_info
*child_pdi
;
16638 /* If this DIE (this DIE's specification, if any) has a parent, then
16639 we should not do this. We'll prepend the parent's fully qualified
16640 name when we create the partial symbol. */
16642 real_pdi
= struct_pdi
;
16643 while (real_pdi
->has_specification
)
16644 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
16645 real_pdi
->spec_is_dwz
, cu
);
16647 if (real_pdi
->die_parent
!= NULL
)
16650 for (child_pdi
= struct_pdi
->die_child
;
16652 child_pdi
= child_pdi
->die_sibling
)
16654 if (child_pdi
->tag
== DW_TAG_subprogram
16655 && child_pdi
->linkage_name
!= NULL
)
16657 char *actual_class_name
16658 = language_class_name_from_physname (cu
->language_defn
,
16659 child_pdi
->linkage_name
);
16660 if (actual_class_name
!= NULL
)
16664 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16666 strlen (actual_class_name
)));
16667 xfree (actual_class_name
);
16674 /* Adjust PART_DIE before generating a symbol for it. This function
16675 may set the is_external flag or change the DIE's name. */
16678 fixup_partial_die (struct partial_die_info
*part_die
,
16679 struct dwarf2_cu
*cu
)
16681 /* Once we've fixed up a die, there's no point in doing so again.
16682 This also avoids a memory leak if we were to call
16683 guess_partial_die_structure_name multiple times. */
16684 if (part_die
->fixup_called
)
16687 /* If we found a reference attribute and the DIE has no name, try
16688 to find a name in the referred to DIE. */
16690 if (part_die
->name
== NULL
&& part_die
->has_specification
)
16692 struct partial_die_info
*spec_die
;
16694 spec_die
= find_partial_die (part_die
->spec_offset
,
16695 part_die
->spec_is_dwz
, cu
);
16697 fixup_partial_die (spec_die
, cu
);
16699 if (spec_die
->name
)
16701 part_die
->name
= spec_die
->name
;
16703 /* Copy DW_AT_external attribute if it is set. */
16704 if (spec_die
->is_external
)
16705 part_die
->is_external
= spec_die
->is_external
;
16709 /* Set default names for some unnamed DIEs. */
16711 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
16712 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
16714 /* If there is no parent die to provide a namespace, and there are
16715 children, see if we can determine the namespace from their linkage
16717 if (cu
->language
== language_cplus
16718 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
16719 && part_die
->die_parent
== NULL
16720 && part_die
->has_children
16721 && (part_die
->tag
== DW_TAG_class_type
16722 || part_die
->tag
== DW_TAG_structure_type
16723 || part_die
->tag
== DW_TAG_union_type
))
16724 guess_partial_die_structure_name (part_die
, cu
);
16726 /* GCC might emit a nameless struct or union that has a linkage
16727 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16728 if (part_die
->name
== NULL
16729 && (part_die
->tag
== DW_TAG_class_type
16730 || part_die
->tag
== DW_TAG_interface_type
16731 || part_die
->tag
== DW_TAG_structure_type
16732 || part_die
->tag
== DW_TAG_union_type
)
16733 && part_die
->linkage_name
!= NULL
)
16737 demangled
= gdb_demangle (part_die
->linkage_name
, DMGL_TYPES
);
16742 /* Strip any leading namespaces/classes, keep only the base name.
16743 DW_AT_name for named DIEs does not contain the prefixes. */
16744 base
= strrchr (demangled
, ':');
16745 if (base
&& base
> demangled
&& base
[-1] == ':')
16752 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
16753 base
, strlen (base
)));
16758 part_die
->fixup_called
= 1;
16761 /* Read an attribute value described by an attribute form. */
16763 static const gdb_byte
*
16764 read_attribute_value (const struct die_reader_specs
*reader
,
16765 struct attribute
*attr
, unsigned form
,
16766 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
16768 struct dwarf2_cu
*cu
= reader
->cu
;
16769 struct objfile
*objfile
= cu
->objfile
;
16770 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
16771 bfd
*abfd
= reader
->abfd
;
16772 struct comp_unit_head
*cu_header
= &cu
->header
;
16773 unsigned int bytes_read
;
16774 struct dwarf_block
*blk
;
16776 attr
->form
= (enum dwarf_form
) form
;
16779 case DW_FORM_ref_addr
:
16780 if (cu
->header
.version
== 2)
16781 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16783 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
16784 &cu
->header
, &bytes_read
);
16785 info_ptr
+= bytes_read
;
16787 case DW_FORM_GNU_ref_alt
:
16788 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16789 info_ptr
+= bytes_read
;
16792 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
16793 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
16794 info_ptr
+= bytes_read
;
16796 case DW_FORM_block2
:
16797 blk
= dwarf_alloc_block (cu
);
16798 blk
->size
= read_2_bytes (abfd
, info_ptr
);
16800 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16801 info_ptr
+= blk
->size
;
16802 DW_BLOCK (attr
) = blk
;
16804 case DW_FORM_block4
:
16805 blk
= dwarf_alloc_block (cu
);
16806 blk
->size
= read_4_bytes (abfd
, info_ptr
);
16808 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16809 info_ptr
+= blk
->size
;
16810 DW_BLOCK (attr
) = blk
;
16812 case DW_FORM_data2
:
16813 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
16816 case DW_FORM_data4
:
16817 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
16820 case DW_FORM_data8
:
16821 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
16824 case DW_FORM_data16
:
16825 blk
= dwarf_alloc_block (cu
);
16827 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
16829 DW_BLOCK (attr
) = blk
;
16831 case DW_FORM_sec_offset
:
16832 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
16833 info_ptr
+= bytes_read
;
16835 case DW_FORM_string
:
16836 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
16837 DW_STRING_IS_CANONICAL (attr
) = 0;
16838 info_ptr
+= bytes_read
;
16841 if (!cu
->per_cu
->is_dwz
)
16843 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
16845 DW_STRING_IS_CANONICAL (attr
) = 0;
16846 info_ptr
+= bytes_read
;
16850 case DW_FORM_line_strp
:
16851 if (!cu
->per_cu
->is_dwz
)
16853 DW_STRING (attr
) = read_indirect_line_string (abfd
, info_ptr
,
16854 cu_header
, &bytes_read
);
16855 DW_STRING_IS_CANONICAL (attr
) = 0;
16856 info_ptr
+= bytes_read
;
16860 case DW_FORM_GNU_strp_alt
:
16862 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
16863 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
16866 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
16867 DW_STRING_IS_CANONICAL (attr
) = 0;
16868 info_ptr
+= bytes_read
;
16871 case DW_FORM_exprloc
:
16872 case DW_FORM_block
:
16873 blk
= dwarf_alloc_block (cu
);
16874 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16875 info_ptr
+= bytes_read
;
16876 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16877 info_ptr
+= blk
->size
;
16878 DW_BLOCK (attr
) = blk
;
16880 case DW_FORM_block1
:
16881 blk
= dwarf_alloc_block (cu
);
16882 blk
->size
= read_1_byte (abfd
, info_ptr
);
16884 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
16885 info_ptr
+= blk
->size
;
16886 DW_BLOCK (attr
) = blk
;
16888 case DW_FORM_data1
:
16889 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16893 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
16896 case DW_FORM_flag_present
:
16897 DW_UNSND (attr
) = 1;
16899 case DW_FORM_sdata
:
16900 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16901 info_ptr
+= bytes_read
;
16903 case DW_FORM_udata
:
16904 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16905 info_ptr
+= bytes_read
;
16908 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16909 + read_1_byte (abfd
, info_ptr
));
16913 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16914 + read_2_bytes (abfd
, info_ptr
));
16918 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16919 + read_4_bytes (abfd
, info_ptr
));
16923 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16924 + read_8_bytes (abfd
, info_ptr
));
16927 case DW_FORM_ref_sig8
:
16928 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
16931 case DW_FORM_ref_udata
:
16932 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
16933 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
16934 info_ptr
+= bytes_read
;
16936 case DW_FORM_indirect
:
16937 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16938 info_ptr
+= bytes_read
;
16939 if (form
== DW_FORM_implicit_const
)
16941 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
16942 info_ptr
+= bytes_read
;
16944 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
16947 case DW_FORM_implicit_const
:
16948 DW_SND (attr
) = implicit_const
;
16950 case DW_FORM_GNU_addr_index
:
16951 if (reader
->dwo_file
== NULL
)
16953 /* For now flag a hard error.
16954 Later we can turn this into a complaint. */
16955 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16956 dwarf_form_name (form
),
16957 bfd_get_filename (abfd
));
16959 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
16960 info_ptr
+= bytes_read
;
16962 case DW_FORM_GNU_str_index
:
16963 if (reader
->dwo_file
== NULL
)
16965 /* For now flag a hard error.
16966 Later we can turn this into a complaint if warranted. */
16967 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
16968 dwarf_form_name (form
),
16969 bfd_get_filename (abfd
));
16972 ULONGEST str_index
=
16973 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
16975 DW_STRING (attr
) = read_str_index (reader
, str_index
);
16976 DW_STRING_IS_CANONICAL (attr
) = 0;
16977 info_ptr
+= bytes_read
;
16981 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
16982 dwarf_form_name (form
),
16983 bfd_get_filename (abfd
));
16987 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
16988 attr
->form
= DW_FORM_GNU_ref_alt
;
16990 /* We have seen instances where the compiler tried to emit a byte
16991 size attribute of -1 which ended up being encoded as an unsigned
16992 0xffffffff. Although 0xffffffff is technically a valid size value,
16993 an object of this size seems pretty unlikely so we can relatively
16994 safely treat these cases as if the size attribute was invalid and
16995 treat them as zero by default. */
16996 if (attr
->name
== DW_AT_byte_size
16997 && form
== DW_FORM_data4
16998 && DW_UNSND (attr
) >= 0xffffffff)
17001 (&symfile_complaints
,
17002 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
17003 hex_string (DW_UNSND (attr
)));
17004 DW_UNSND (attr
) = 0;
17010 /* Read an attribute described by an abbreviated attribute. */
17012 static const gdb_byte
*
17013 read_attribute (const struct die_reader_specs
*reader
,
17014 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
17015 const gdb_byte
*info_ptr
)
17017 attr
->name
= abbrev
->name
;
17018 return read_attribute_value (reader
, attr
, abbrev
->form
,
17019 abbrev
->implicit_const
, info_ptr
);
17022 /* Read dwarf information from a buffer. */
17024 static unsigned int
17025 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
17027 return bfd_get_8 (abfd
, buf
);
17031 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
17033 return bfd_get_signed_8 (abfd
, buf
);
17036 static unsigned int
17037 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17039 return bfd_get_16 (abfd
, buf
);
17043 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17045 return bfd_get_signed_16 (abfd
, buf
);
17048 static unsigned int
17049 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17051 return bfd_get_32 (abfd
, buf
);
17055 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17057 return bfd_get_signed_32 (abfd
, buf
);
17061 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
17063 return bfd_get_64 (abfd
, buf
);
17067 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
17068 unsigned int *bytes_read
)
17070 struct comp_unit_head
*cu_header
= &cu
->header
;
17071 CORE_ADDR retval
= 0;
17073 if (cu_header
->signed_addr_p
)
17075 switch (cu_header
->addr_size
)
17078 retval
= bfd_get_signed_16 (abfd
, buf
);
17081 retval
= bfd_get_signed_32 (abfd
, buf
);
17084 retval
= bfd_get_signed_64 (abfd
, buf
);
17087 internal_error (__FILE__
, __LINE__
,
17088 _("read_address: bad switch, signed [in module %s]"),
17089 bfd_get_filename (abfd
));
17094 switch (cu_header
->addr_size
)
17097 retval
= bfd_get_16 (abfd
, buf
);
17100 retval
= bfd_get_32 (abfd
, buf
);
17103 retval
= bfd_get_64 (abfd
, buf
);
17106 internal_error (__FILE__
, __LINE__
,
17107 _("read_address: bad switch, "
17108 "unsigned [in module %s]"),
17109 bfd_get_filename (abfd
));
17113 *bytes_read
= cu_header
->addr_size
;
17117 /* Read the initial length from a section. The (draft) DWARF 3
17118 specification allows the initial length to take up either 4 bytes
17119 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
17120 bytes describe the length and all offsets will be 8 bytes in length
17123 An older, non-standard 64-bit format is also handled by this
17124 function. The older format in question stores the initial length
17125 as an 8-byte quantity without an escape value. Lengths greater
17126 than 2^32 aren't very common which means that the initial 4 bytes
17127 is almost always zero. Since a length value of zero doesn't make
17128 sense for the 32-bit format, this initial zero can be considered to
17129 be an escape value which indicates the presence of the older 64-bit
17130 format. As written, the code can't detect (old format) lengths
17131 greater than 4GB. If it becomes necessary to handle lengths
17132 somewhat larger than 4GB, we could allow other small values (such
17133 as the non-sensical values of 1, 2, and 3) to also be used as
17134 escape values indicating the presence of the old format.
17136 The value returned via bytes_read should be used to increment the
17137 relevant pointer after calling read_initial_length().
17139 [ Note: read_initial_length() and read_offset() are based on the
17140 document entitled "DWARF Debugging Information Format", revision
17141 3, draft 8, dated November 19, 2001. This document was obtained
17144 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
17146 This document is only a draft and is subject to change. (So beware.)
17148 Details regarding the older, non-standard 64-bit format were
17149 determined empirically by examining 64-bit ELF files produced by
17150 the SGI toolchain on an IRIX 6.5 machine.
17152 - Kevin, July 16, 2002
17156 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
17158 LONGEST length
= bfd_get_32 (abfd
, buf
);
17160 if (length
== 0xffffffff)
17162 length
= bfd_get_64 (abfd
, buf
+ 4);
17165 else if (length
== 0)
17167 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
17168 length
= bfd_get_64 (abfd
, buf
);
17179 /* Cover function for read_initial_length.
17180 Returns the length of the object at BUF, and stores the size of the
17181 initial length in *BYTES_READ and stores the size that offsets will be in
17183 If the initial length size is not equivalent to that specified in
17184 CU_HEADER then issue a complaint.
17185 This is useful when reading non-comp-unit headers. */
17188 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
17189 const struct comp_unit_head
*cu_header
,
17190 unsigned int *bytes_read
,
17191 unsigned int *offset_size
)
17193 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
17195 gdb_assert (cu_header
->initial_length_size
== 4
17196 || cu_header
->initial_length_size
== 8
17197 || cu_header
->initial_length_size
== 12);
17199 if (cu_header
->initial_length_size
!= *bytes_read
)
17200 complaint (&symfile_complaints
,
17201 _("intermixed 32-bit and 64-bit DWARF sections"));
17203 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
17207 /* Read an offset from the data stream. The size of the offset is
17208 given by cu_header->offset_size. */
17211 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
17212 const struct comp_unit_head
*cu_header
,
17213 unsigned int *bytes_read
)
17215 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
17217 *bytes_read
= cu_header
->offset_size
;
17221 /* Read an offset from the data stream. */
17224 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
17226 LONGEST retval
= 0;
17228 switch (offset_size
)
17231 retval
= bfd_get_32 (abfd
, buf
);
17234 retval
= bfd_get_64 (abfd
, buf
);
17237 internal_error (__FILE__
, __LINE__
,
17238 _("read_offset_1: bad switch [in module %s]"),
17239 bfd_get_filename (abfd
));
17245 static const gdb_byte
*
17246 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
17248 /* If the size of a host char is 8 bits, we can return a pointer
17249 to the buffer, otherwise we have to copy the data to a buffer
17250 allocated on the temporary obstack. */
17251 gdb_assert (HOST_CHAR_BIT
== 8);
17255 static const char *
17256 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
17257 unsigned int *bytes_read_ptr
)
17259 /* If the size of a host char is 8 bits, we can return a pointer
17260 to the string, otherwise we have to copy the string to a buffer
17261 allocated on the temporary obstack. */
17262 gdb_assert (HOST_CHAR_BIT
== 8);
17265 *bytes_read_ptr
= 1;
17268 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
17269 return (const char *) buf
;
17272 /* Return pointer to string at section SECT offset STR_OFFSET with error
17273 reporting strings FORM_NAME and SECT_NAME. */
17275 static const char *
17276 read_indirect_string_at_offset_from (bfd
*abfd
, LONGEST str_offset
,
17277 struct dwarf2_section_info
*sect
,
17278 const char *form_name
,
17279 const char *sect_name
)
17281 dwarf2_read_section (dwarf2_per_objfile
->objfile
, sect
);
17282 if (sect
->buffer
== NULL
)
17283 error (_("%s used without %s section [in module %s]"),
17284 form_name
, sect_name
, bfd_get_filename (abfd
));
17285 if (str_offset
>= sect
->size
)
17286 error (_("%s pointing outside of %s section [in module %s]"),
17287 form_name
, sect_name
, bfd_get_filename (abfd
));
17288 gdb_assert (HOST_CHAR_BIT
== 8);
17289 if (sect
->buffer
[str_offset
] == '\0')
17291 return (const char *) (sect
->buffer
+ str_offset
);
17294 /* Return pointer to string at .debug_str offset STR_OFFSET. */
17296 static const char *
17297 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
17299 return read_indirect_string_at_offset_from (abfd
, str_offset
,
17300 &dwarf2_per_objfile
->str
,
17301 "DW_FORM_strp", ".debug_str");
17304 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
17306 static const char *
17307 read_indirect_line_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
17309 return read_indirect_string_at_offset_from (abfd
, str_offset
,
17310 &dwarf2_per_objfile
->line_str
,
17311 "DW_FORM_line_strp",
17312 ".debug_line_str");
17315 /* Read a string at offset STR_OFFSET in the .debug_str section from
17316 the .dwz file DWZ. Throw an error if the offset is too large. If
17317 the string consists of a single NUL byte, return NULL; otherwise
17318 return a pointer to the string. */
17320 static const char *
17321 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
17323 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
17325 if (dwz
->str
.buffer
== NULL
)
17326 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
17327 "section [in module %s]"),
17328 bfd_get_filename (dwz
->dwz_bfd
));
17329 if (str_offset
>= dwz
->str
.size
)
17330 error (_("DW_FORM_GNU_strp_alt pointing outside of "
17331 ".debug_str section [in module %s]"),
17332 bfd_get_filename (dwz
->dwz_bfd
));
17333 gdb_assert (HOST_CHAR_BIT
== 8);
17334 if (dwz
->str
.buffer
[str_offset
] == '\0')
17336 return (const char *) (dwz
->str
.buffer
+ str_offset
);
17339 /* Return pointer to string at .debug_str offset as read from BUF.
17340 BUF is assumed to be in a compilation unit described by CU_HEADER.
17341 Return *BYTES_READ_PTR count of bytes read from BUF. */
17343 static const char *
17344 read_indirect_string (bfd
*abfd
, const gdb_byte
*buf
,
17345 const struct comp_unit_head
*cu_header
,
17346 unsigned int *bytes_read_ptr
)
17348 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
17350 return read_indirect_string_at_offset (abfd
, str_offset
);
17353 /* Return pointer to string at .debug_line_str offset as read from BUF.
17354 BUF is assumed to be in a compilation unit described by CU_HEADER.
17355 Return *BYTES_READ_PTR count of bytes read from BUF. */
17357 static const char *
17358 read_indirect_line_string (bfd
*abfd
, const gdb_byte
*buf
,
17359 const struct comp_unit_head
*cu_header
,
17360 unsigned int *bytes_read_ptr
)
17362 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
17364 return read_indirect_line_string_at_offset (abfd
, str_offset
);
17368 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
17369 unsigned int *bytes_read_ptr
)
17372 unsigned int num_read
;
17374 unsigned char byte
;
17381 byte
= bfd_get_8 (abfd
, buf
);
17384 result
|= ((ULONGEST
) (byte
& 127) << shift
);
17385 if ((byte
& 128) == 0)
17391 *bytes_read_ptr
= num_read
;
17396 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
17397 unsigned int *bytes_read_ptr
)
17400 int shift
, num_read
;
17401 unsigned char byte
;
17408 byte
= bfd_get_8 (abfd
, buf
);
17411 result
|= ((LONGEST
) (byte
& 127) << shift
);
17413 if ((byte
& 128) == 0)
17418 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
17419 result
|= -(((LONGEST
) 1) << shift
);
17420 *bytes_read_ptr
= num_read
;
17424 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
17425 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
17426 ADDR_SIZE is the size of addresses from the CU header. */
17429 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
17431 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17432 bfd
*abfd
= objfile
->obfd
;
17433 const gdb_byte
*info_ptr
;
17435 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
17436 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
17437 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
17438 objfile_name (objfile
));
17439 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
17440 error (_("DW_FORM_addr_index pointing outside of "
17441 ".debug_addr section [in module %s]"),
17442 objfile_name (objfile
));
17443 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
17444 + addr_base
+ addr_index
* addr_size
);
17445 if (addr_size
== 4)
17446 return bfd_get_32 (abfd
, info_ptr
);
17448 return bfd_get_64 (abfd
, info_ptr
);
17451 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
17454 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
17456 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
17459 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
17462 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
17463 unsigned int *bytes_read
)
17465 bfd
*abfd
= cu
->objfile
->obfd
;
17466 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
17468 return read_addr_index (cu
, addr_index
);
17471 /* Data structure to pass results from dwarf2_read_addr_index_reader
17472 back to dwarf2_read_addr_index. */
17474 struct dwarf2_read_addr_index_data
17476 ULONGEST addr_base
;
17480 /* die_reader_func for dwarf2_read_addr_index. */
17483 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
17484 const gdb_byte
*info_ptr
,
17485 struct die_info
*comp_unit_die
,
17489 struct dwarf2_cu
*cu
= reader
->cu
;
17490 struct dwarf2_read_addr_index_data
*aidata
=
17491 (struct dwarf2_read_addr_index_data
*) data
;
17493 aidata
->addr_base
= cu
->addr_base
;
17494 aidata
->addr_size
= cu
->header
.addr_size
;
17497 /* Given an index in .debug_addr, fetch the value.
17498 NOTE: This can be called during dwarf expression evaluation,
17499 long after the debug information has been read, and thus per_cu->cu
17500 may no longer exist. */
17503 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
17504 unsigned int addr_index
)
17506 struct objfile
*objfile
= per_cu
->objfile
;
17507 struct dwarf2_cu
*cu
= per_cu
->cu
;
17508 ULONGEST addr_base
;
17511 /* This is intended to be called from outside this file. */
17512 dw2_setup (objfile
);
17514 /* We need addr_base and addr_size.
17515 If we don't have PER_CU->cu, we have to get it.
17516 Nasty, but the alternative is storing the needed info in PER_CU,
17517 which at this point doesn't seem justified: it's not clear how frequently
17518 it would get used and it would increase the size of every PER_CU.
17519 Entry points like dwarf2_per_cu_addr_size do a similar thing
17520 so we're not in uncharted territory here.
17521 Alas we need to be a bit more complicated as addr_base is contained
17524 We don't need to read the entire CU(/TU).
17525 We just need the header and top level die.
17527 IWBN to use the aging mechanism to let us lazily later discard the CU.
17528 For now we skip this optimization. */
17532 addr_base
= cu
->addr_base
;
17533 addr_size
= cu
->header
.addr_size
;
17537 struct dwarf2_read_addr_index_data aidata
;
17539 /* Note: We can't use init_cutu_and_read_dies_simple here,
17540 we need addr_base. */
17541 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
17542 dwarf2_read_addr_index_reader
, &aidata
);
17543 addr_base
= aidata
.addr_base
;
17544 addr_size
= aidata
.addr_size
;
17547 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
17550 /* Given a DW_FORM_GNU_str_index, fetch the string.
17551 This is only used by the Fission support. */
17553 static const char *
17554 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
17556 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17557 const char *objf_name
= objfile_name (objfile
);
17558 bfd
*abfd
= objfile
->obfd
;
17559 struct dwarf2_cu
*cu
= reader
->cu
;
17560 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
17561 struct dwarf2_section_info
*str_offsets_section
=
17562 &reader
->dwo_file
->sections
.str_offsets
;
17563 const gdb_byte
*info_ptr
;
17564 ULONGEST str_offset
;
17565 static const char form_name
[] = "DW_FORM_GNU_str_index";
17567 dwarf2_read_section (objfile
, str_section
);
17568 dwarf2_read_section (objfile
, str_offsets_section
);
17569 if (str_section
->buffer
== NULL
)
17570 error (_("%s used without .debug_str.dwo section"
17571 " in CU at offset 0x%x [in module %s]"),
17572 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17573 if (str_offsets_section
->buffer
== NULL
)
17574 error (_("%s used without .debug_str_offsets.dwo section"
17575 " in CU at offset 0x%x [in module %s]"),
17576 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17577 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
17578 error (_("%s pointing outside of .debug_str_offsets.dwo"
17579 " section in CU at offset 0x%x [in module %s]"),
17580 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17581 info_ptr
= (str_offsets_section
->buffer
17582 + str_index
* cu
->header
.offset_size
);
17583 if (cu
->header
.offset_size
== 4)
17584 str_offset
= bfd_get_32 (abfd
, info_ptr
);
17586 str_offset
= bfd_get_64 (abfd
, info_ptr
);
17587 if (str_offset
>= str_section
->size
)
17588 error (_("Offset from %s pointing outside of"
17589 " .debug_str.dwo section in CU at offset 0x%x [in module %s]"),
17590 form_name
, to_underlying (cu
->header
.sect_off
), objf_name
);
17591 return (const char *) (str_section
->buffer
+ str_offset
);
17594 /* Return the length of an LEB128 number in BUF. */
17597 leb128_size (const gdb_byte
*buf
)
17599 const gdb_byte
*begin
= buf
;
17605 if ((byte
& 128) == 0)
17606 return buf
- begin
;
17611 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
17620 cu
->language
= language_c
;
17623 case DW_LANG_C_plus_plus
:
17624 case DW_LANG_C_plus_plus_11
:
17625 case DW_LANG_C_plus_plus_14
:
17626 cu
->language
= language_cplus
;
17629 cu
->language
= language_d
;
17631 case DW_LANG_Fortran77
:
17632 case DW_LANG_Fortran90
:
17633 case DW_LANG_Fortran95
:
17634 case DW_LANG_Fortran03
:
17635 case DW_LANG_Fortran08
:
17636 cu
->language
= language_fortran
;
17639 cu
->language
= language_go
;
17641 case DW_LANG_Mips_Assembler
:
17642 cu
->language
= language_asm
;
17644 case DW_LANG_Ada83
:
17645 case DW_LANG_Ada95
:
17646 cu
->language
= language_ada
;
17648 case DW_LANG_Modula2
:
17649 cu
->language
= language_m2
;
17651 case DW_LANG_Pascal83
:
17652 cu
->language
= language_pascal
;
17655 cu
->language
= language_objc
;
17658 case DW_LANG_Rust_old
:
17659 cu
->language
= language_rust
;
17661 case DW_LANG_Cobol74
:
17662 case DW_LANG_Cobol85
:
17664 cu
->language
= language_minimal
;
17667 cu
->language_defn
= language_def (cu
->language
);
17670 /* Return the named attribute or NULL if not there. */
17672 static struct attribute
*
17673 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17678 struct attribute
*spec
= NULL
;
17680 for (i
= 0; i
< die
->num_attrs
; ++i
)
17682 if (die
->attrs
[i
].name
== name
)
17683 return &die
->attrs
[i
];
17684 if (die
->attrs
[i
].name
== DW_AT_specification
17685 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
17686 spec
= &die
->attrs
[i
];
17692 die
= follow_die_ref (die
, spec
, &cu
);
17698 /* Return the named attribute or NULL if not there,
17699 but do not follow DW_AT_specification, etc.
17700 This is for use in contexts where we're reading .debug_types dies.
17701 Following DW_AT_specification, DW_AT_abstract_origin will take us
17702 back up the chain, and we want to go down. */
17704 static struct attribute
*
17705 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
17709 for (i
= 0; i
< die
->num_attrs
; ++i
)
17710 if (die
->attrs
[i
].name
== name
)
17711 return &die
->attrs
[i
];
17716 /* Return the string associated with a string-typed attribute, or NULL if it
17717 is either not found or is of an incorrect type. */
17719 static const char *
17720 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
17722 struct attribute
*attr
;
17723 const char *str
= NULL
;
17725 attr
= dwarf2_attr (die
, name
, cu
);
17729 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
17730 || attr
->form
== DW_FORM_string
17731 || attr
->form
== DW_FORM_GNU_str_index
17732 || attr
->form
== DW_FORM_GNU_strp_alt
)
17733 str
= DW_STRING (attr
);
17735 complaint (&symfile_complaints
,
17736 _("string type expected for attribute %s for "
17737 "DIE at 0x%x in module %s"),
17738 dwarf_attr_name (name
), to_underlying (die
->sect_off
),
17739 objfile_name (cu
->objfile
));
17745 /* Return non-zero iff the attribute NAME is defined for the given DIE,
17746 and holds a non-zero value. This function should only be used for
17747 DW_FORM_flag or DW_FORM_flag_present attributes. */
17750 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
17752 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
17754 return (attr
&& DW_UNSND (attr
));
17758 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
17760 /* A DIE is a declaration if it has a DW_AT_declaration attribute
17761 which value is non-zero. However, we have to be careful with
17762 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
17763 (via dwarf2_flag_true_p) follows this attribute. So we may
17764 end up accidently finding a declaration attribute that belongs
17765 to a different DIE referenced by the specification attribute,
17766 even though the given DIE does not have a declaration attribute. */
17767 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
17768 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
17771 /* Return the die giving the specification for DIE, if there is
17772 one. *SPEC_CU is the CU containing DIE on input, and the CU
17773 containing the return value on output. If there is no
17774 specification, but there is an abstract origin, that is
17777 static struct die_info
*
17778 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
17780 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
17783 if (spec_attr
== NULL
)
17784 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
17786 if (spec_attr
== NULL
)
17789 return follow_die_ref (die
, spec_attr
, spec_cu
);
17792 /* Stub for free_line_header to match void * callback types. */
17795 free_line_header_voidp (void *arg
)
17797 struct line_header
*lh
= (struct line_header
*) arg
;
17803 line_header::add_include_dir (const char *include_dir
)
17805 if (dwarf_line_debug
>= 2)
17806 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
17807 include_dirs
.size () + 1, include_dir
);
17809 include_dirs
.push_back (include_dir
);
17813 line_header::add_file_name (const char *name
,
17815 unsigned int mod_time
,
17816 unsigned int length
)
17818 if (dwarf_line_debug
>= 2)
17819 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
17820 (unsigned) file_names
.size () + 1, name
);
17822 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
17825 /* A convenience function to find the proper .debug_line section for a CU. */
17827 static struct dwarf2_section_info
*
17828 get_debug_line_section (struct dwarf2_cu
*cu
)
17830 struct dwarf2_section_info
*section
;
17832 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
17834 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
17835 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
17836 else if (cu
->per_cu
->is_dwz
)
17838 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17840 section
= &dwz
->line
;
17843 section
= &dwarf2_per_objfile
->line
;
17848 /* Read directory or file name entry format, starting with byte of
17849 format count entries, ULEB128 pairs of entry formats, ULEB128 of
17850 entries count and the entries themselves in the described entry
17854 read_formatted_entries (bfd
*abfd
, const gdb_byte
**bufp
,
17855 struct line_header
*lh
,
17856 const struct comp_unit_head
*cu_header
,
17857 void (*callback
) (struct line_header
*lh
,
17860 unsigned int mod_time
,
17861 unsigned int length
))
17863 gdb_byte format_count
, formati
;
17864 ULONGEST data_count
, datai
;
17865 const gdb_byte
*buf
= *bufp
;
17866 const gdb_byte
*format_header_data
;
17868 unsigned int bytes_read
;
17870 format_count
= read_1_byte (abfd
, buf
);
17872 format_header_data
= buf
;
17873 for (formati
= 0; formati
< format_count
; formati
++)
17875 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17877 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17881 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
17883 for (datai
= 0; datai
< data_count
; datai
++)
17885 const gdb_byte
*format
= format_header_data
;
17886 struct file_entry fe
;
17888 for (formati
= 0; formati
< format_count
; formati
++)
17890 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
17891 format
+= bytes_read
;
17893 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
17894 format
+= bytes_read
;
17896 gdb::optional
<const char *> string
;
17897 gdb::optional
<unsigned int> uint
;
17901 case DW_FORM_string
:
17902 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
17906 case DW_FORM_line_strp
:
17907 string
.emplace (read_indirect_line_string (abfd
, buf
,
17913 case DW_FORM_data1
:
17914 uint
.emplace (read_1_byte (abfd
, buf
));
17918 case DW_FORM_data2
:
17919 uint
.emplace (read_2_bytes (abfd
, buf
));
17923 case DW_FORM_data4
:
17924 uint
.emplace (read_4_bytes (abfd
, buf
));
17928 case DW_FORM_data8
:
17929 uint
.emplace (read_8_bytes (abfd
, buf
));
17933 case DW_FORM_udata
:
17934 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
17938 case DW_FORM_block
:
17939 /* It is valid only for DW_LNCT_timestamp which is ignored by
17944 switch (content_type
)
17947 if (string
.has_value ())
17950 case DW_LNCT_directory_index
:
17951 if (uint
.has_value ())
17952 fe
.d_index
= (dir_index
) *uint
;
17954 case DW_LNCT_timestamp
:
17955 if (uint
.has_value ())
17956 fe
.mod_time
= *uint
;
17959 if (uint
.has_value ())
17965 complaint (&symfile_complaints
,
17966 _("Unknown format content type %s"),
17967 pulongest (content_type
));
17971 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
17977 /* Read the statement program header starting at OFFSET in
17978 .debug_line, or .debug_line.dwo. Return a pointer
17979 to a struct line_header, allocated using xmalloc.
17980 Returns NULL if there is a problem reading the header, e.g., if it
17981 has a version we don't understand.
17983 NOTE: the strings in the include directory and file name tables of
17984 the returned object point into the dwarf line section buffer,
17985 and must not be freed. */
17987 static line_header_up
17988 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
17990 const gdb_byte
*line_ptr
;
17991 unsigned int bytes_read
, offset_size
;
17993 const char *cur_dir
, *cur_file
;
17994 struct dwarf2_section_info
*section
;
17997 section
= get_debug_line_section (cu
);
17998 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
17999 if (section
->buffer
== NULL
)
18001 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
18002 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
18004 complaint (&symfile_complaints
, _("missing .debug_line section"));
18008 /* We can't do this until we know the section is non-empty.
18009 Only then do we know we have such a section. */
18010 abfd
= get_section_bfd_owner (section
);
18012 /* Make sure that at least there's room for the total_length field.
18013 That could be 12 bytes long, but we're just going to fudge that. */
18014 if (to_underlying (sect_off
) + 4 >= section
->size
)
18016 dwarf2_statement_list_fits_in_line_number_section_complaint ();
18020 line_header_up
lh (new line_header ());
18022 lh
->sect_off
= sect_off
;
18023 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
18025 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
18027 /* Read in the header. */
18029 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
18030 &bytes_read
, &offset_size
);
18031 line_ptr
+= bytes_read
;
18032 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
18034 dwarf2_statement_list_fits_in_line_number_section_complaint ();
18037 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
18038 lh
->version
= read_2_bytes (abfd
, line_ptr
);
18040 if (lh
->version
> 5)
18042 /* This is a version we don't understand. The format could have
18043 changed in ways we don't handle properly so just punt. */
18044 complaint (&symfile_complaints
,
18045 _("unsupported version in .debug_line section"));
18048 if (lh
->version
>= 5)
18050 gdb_byte segment_selector_size
;
18052 /* Skip address size. */
18053 read_1_byte (abfd
, line_ptr
);
18056 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
18058 if (segment_selector_size
!= 0)
18060 complaint (&symfile_complaints
,
18061 _("unsupported segment selector size %u "
18062 "in .debug_line section"),
18063 segment_selector_size
);
18067 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
18068 line_ptr
+= offset_size
;
18069 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
18071 if (lh
->version
>= 4)
18073 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
18077 lh
->maximum_ops_per_instruction
= 1;
18079 if (lh
->maximum_ops_per_instruction
== 0)
18081 lh
->maximum_ops_per_instruction
= 1;
18082 complaint (&symfile_complaints
,
18083 _("invalid maximum_ops_per_instruction "
18084 "in `.debug_line' section"));
18087 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
18089 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
18091 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
18093 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
18095 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
18097 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
18098 for (i
= 1; i
< lh
->opcode_base
; ++i
)
18100 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
18104 if (lh
->version
>= 5)
18106 /* Read directory table. */
18107 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18108 [] (struct line_header
*lh
, const char *name
,
18109 dir_index d_index
, unsigned int mod_time
,
18110 unsigned int length
)
18112 lh
->add_include_dir (name
);
18115 /* Read file name table. */
18116 read_formatted_entries (abfd
, &line_ptr
, lh
.get (), &cu
->header
,
18117 [] (struct line_header
*lh
, const char *name
,
18118 dir_index d_index
, unsigned int mod_time
,
18119 unsigned int length
)
18121 lh
->add_file_name (name
, d_index
, mod_time
, length
);
18126 /* Read directory table. */
18127 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18129 line_ptr
+= bytes_read
;
18130 lh
->add_include_dir (cur_dir
);
18132 line_ptr
+= bytes_read
;
18134 /* Read file name table. */
18135 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
18137 unsigned int mod_time
, length
;
18140 line_ptr
+= bytes_read
;
18141 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18142 line_ptr
+= bytes_read
;
18143 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18144 line_ptr
+= bytes_read
;
18145 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18146 line_ptr
+= bytes_read
;
18148 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
18150 line_ptr
+= bytes_read
;
18152 lh
->statement_program_start
= line_ptr
;
18154 if (line_ptr
> (section
->buffer
+ section
->size
))
18155 complaint (&symfile_complaints
,
18156 _("line number info header doesn't "
18157 "fit in `.debug_line' section"));
18162 /* Subroutine of dwarf_decode_lines to simplify it.
18163 Return the file name of the psymtab for included file FILE_INDEX
18164 in line header LH of PST.
18165 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18166 If space for the result is malloc'd, it will be freed by a cleanup.
18167 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename.
18169 The function creates dangling cleanup registration. */
18171 static const char *
18172 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
18173 const struct partial_symtab
*pst
,
18174 const char *comp_dir
)
18176 const file_entry
&fe
= lh
->file_names
[file_index
];
18177 const char *include_name
= fe
.name
;
18178 const char *include_name_to_compare
= include_name
;
18179 const char *pst_filename
;
18180 char *copied_name
= NULL
;
18183 const char *dir_name
= fe
.include_dir (lh
);
18185 if (!IS_ABSOLUTE_PATH (include_name
)
18186 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
18188 /* Avoid creating a duplicate psymtab for PST.
18189 We do this by comparing INCLUDE_NAME and PST_FILENAME.
18190 Before we do the comparison, however, we need to account
18191 for DIR_NAME and COMP_DIR.
18192 First prepend dir_name (if non-NULL). If we still don't
18193 have an absolute path prepend comp_dir (if non-NULL).
18194 However, the directory we record in the include-file's
18195 psymtab does not contain COMP_DIR (to match the
18196 corresponding symtab(s)).
18201 bash$ gcc -g ./hello.c
18202 include_name = "hello.c"
18204 DW_AT_comp_dir = comp_dir = "/tmp"
18205 DW_AT_name = "./hello.c"
18209 if (dir_name
!= NULL
)
18211 char *tem
= concat (dir_name
, SLASH_STRING
,
18212 include_name
, (char *)NULL
);
18214 make_cleanup (xfree
, tem
);
18215 include_name
= tem
;
18216 include_name_to_compare
= include_name
;
18218 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
18220 char *tem
= concat (comp_dir
, SLASH_STRING
,
18221 include_name
, (char *)NULL
);
18223 make_cleanup (xfree
, tem
);
18224 include_name_to_compare
= tem
;
18228 pst_filename
= pst
->filename
;
18229 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
18231 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
18232 pst_filename
, (char *)NULL
);
18233 pst_filename
= copied_name
;
18236 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
18238 if (copied_name
!= NULL
)
18239 xfree (copied_name
);
18243 return include_name
;
18246 /* State machine to track the state of the line number program. */
18248 class lnp_state_machine
18251 /* Initialize a machine state for the start of a line number
18253 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
18255 file_entry
*current_file ()
18257 /* lh->file_names is 0-based, but the file name numbers in the
18258 statement program are 1-based. */
18259 return m_line_header
->file_name_at (m_file
);
18262 /* Record the line in the state machine. END_SEQUENCE is true if
18263 we're processing the end of a sequence. */
18264 void record_line (bool end_sequence
);
18266 /* Check address and if invalid nop-out the rest of the lines in this
18268 void check_line_address (struct dwarf2_cu
*cu
,
18269 const gdb_byte
*line_ptr
,
18270 CORE_ADDR lowpc
, CORE_ADDR address
);
18272 void handle_set_discriminator (unsigned int discriminator
)
18274 m_discriminator
= discriminator
;
18275 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
18278 /* Handle DW_LNE_set_address. */
18279 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
18282 address
+= baseaddr
;
18283 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
18286 /* Handle DW_LNS_advance_pc. */
18287 void handle_advance_pc (CORE_ADDR adjust
);
18289 /* Handle a special opcode. */
18290 void handle_special_opcode (unsigned char op_code
);
18292 /* Handle DW_LNS_advance_line. */
18293 void handle_advance_line (int line_delta
)
18295 advance_line (line_delta
);
18298 /* Handle DW_LNS_set_file. */
18299 void handle_set_file (file_name_index file
);
18301 /* Handle DW_LNS_negate_stmt. */
18302 void handle_negate_stmt ()
18304 m_is_stmt
= !m_is_stmt
;
18307 /* Handle DW_LNS_const_add_pc. */
18308 void handle_const_add_pc ();
18310 /* Handle DW_LNS_fixed_advance_pc. */
18311 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
18313 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18317 /* Handle DW_LNS_copy. */
18318 void handle_copy ()
18320 record_line (false);
18321 m_discriminator
= 0;
18324 /* Handle DW_LNE_end_sequence. */
18325 void handle_end_sequence ()
18327 m_record_line_callback
= ::record_line
;
18331 /* Advance the line by LINE_DELTA. */
18332 void advance_line (int line_delta
)
18334 m_line
+= line_delta
;
18336 if (line_delta
!= 0)
18337 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
18340 gdbarch
*m_gdbarch
;
18342 /* True if we're recording lines.
18343 Otherwise we're building partial symtabs and are just interested in
18344 finding include files mentioned by the line number program. */
18345 bool m_record_lines_p
;
18347 /* The line number header. */
18348 line_header
*m_line_header
;
18350 /* These are part of the standard DWARF line number state machine,
18351 and initialized according to the DWARF spec. */
18353 unsigned char m_op_index
= 0;
18354 /* The line table index (1-based) of the current file. */
18355 file_name_index m_file
= (file_name_index
) 1;
18356 unsigned int m_line
= 1;
18358 /* These are initialized in the constructor. */
18360 CORE_ADDR m_address
;
18362 unsigned int m_discriminator
;
18364 /* Additional bits of state we need to track. */
18366 /* The last file that we called dwarf2_start_subfile for.
18367 This is only used for TLLs. */
18368 unsigned int m_last_file
= 0;
18369 /* The last file a line number was recorded for. */
18370 struct subfile
*m_last_subfile
= NULL
;
18372 /* The function to call to record a line. */
18373 record_line_ftype
*m_record_line_callback
= NULL
;
18375 /* The last line number that was recorded, used to coalesce
18376 consecutive entries for the same line. This can happen, for
18377 example, when discriminators are present. PR 17276. */
18378 unsigned int m_last_line
= 0;
18379 bool m_line_has_non_zero_discriminator
= false;
18383 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
18385 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
18386 / m_line_header
->maximum_ops_per_instruction
)
18387 * m_line_header
->minimum_instruction_length
);
18388 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18389 m_op_index
= ((m_op_index
+ adjust
)
18390 % m_line_header
->maximum_ops_per_instruction
);
18394 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
18396 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
18397 CORE_ADDR addr_adj
= (((m_op_index
18398 + (adj_opcode
/ m_line_header
->line_range
))
18399 / m_line_header
->maximum_ops_per_instruction
)
18400 * m_line_header
->minimum_instruction_length
);
18401 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18402 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
18403 % m_line_header
->maximum_ops_per_instruction
);
18405 int line_delta
= (m_line_header
->line_base
18406 + (adj_opcode
% m_line_header
->line_range
));
18407 advance_line (line_delta
);
18408 record_line (false);
18409 m_discriminator
= 0;
18413 lnp_state_machine::handle_set_file (file_name_index file
)
18417 const file_entry
*fe
= current_file ();
18419 dwarf2_debug_line_missing_file_complaint ();
18420 else if (m_record_lines_p
)
18422 const char *dir
= fe
->include_dir (m_line_header
);
18424 m_last_subfile
= current_subfile
;
18425 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
18426 dwarf2_start_subfile (fe
->name
, dir
);
18431 lnp_state_machine::handle_const_add_pc ()
18434 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
18437 = (((m_op_index
+ adjust
)
18438 / m_line_header
->maximum_ops_per_instruction
)
18439 * m_line_header
->minimum_instruction_length
);
18441 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
18442 m_op_index
= ((m_op_index
+ adjust
)
18443 % m_line_header
->maximum_ops_per_instruction
);
18446 /* Ignore this record_line request. */
18449 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
18454 /* Return non-zero if we should add LINE to the line number table.
18455 LINE is the line to add, LAST_LINE is the last line that was added,
18456 LAST_SUBFILE is the subfile for LAST_LINE.
18457 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
18458 had a non-zero discriminator.
18460 We have to be careful in the presence of discriminators.
18461 E.g., for this line:
18463 for (i = 0; i < 100000; i++);
18465 clang can emit four line number entries for that one line,
18466 each with a different discriminator.
18467 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
18469 However, we want gdb to coalesce all four entries into one.
18470 Otherwise the user could stepi into the middle of the line and
18471 gdb would get confused about whether the pc really was in the
18472 middle of the line.
18474 Things are further complicated by the fact that two consecutive
18475 line number entries for the same line is a heuristic used by gcc
18476 to denote the end of the prologue. So we can't just discard duplicate
18477 entries, we have to be selective about it. The heuristic we use is
18478 that we only collapse consecutive entries for the same line if at least
18479 one of those entries has a non-zero discriminator. PR 17276.
18481 Note: Addresses in the line number state machine can never go backwards
18482 within one sequence, thus this coalescing is ok. */
18485 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
18486 int line_has_non_zero_discriminator
,
18487 struct subfile
*last_subfile
)
18489 if (current_subfile
!= last_subfile
)
18491 if (line
!= last_line
)
18493 /* Same line for the same file that we've seen already.
18494 As a last check, for pr 17276, only record the line if the line
18495 has never had a non-zero discriminator. */
18496 if (!line_has_non_zero_discriminator
)
18501 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
18502 in the line table of subfile SUBFILE. */
18505 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
18506 unsigned int line
, CORE_ADDR address
,
18507 record_line_ftype p_record_line
)
18509 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
18511 if (dwarf_line_debug
)
18513 fprintf_unfiltered (gdb_stdlog
,
18514 "Recording line %u, file %s, address %s\n",
18515 line
, lbasename (subfile
->name
),
18516 paddress (gdbarch
, address
));
18519 (*p_record_line
) (subfile
, line
, addr
);
18522 /* Subroutine of dwarf_decode_lines_1 to simplify it.
18523 Mark the end of a set of line number records.
18524 The arguments are the same as for dwarf_record_line_1.
18525 If SUBFILE is NULL the request is ignored. */
18528 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
18529 CORE_ADDR address
, record_line_ftype p_record_line
)
18531 if (subfile
== NULL
)
18534 if (dwarf_line_debug
)
18536 fprintf_unfiltered (gdb_stdlog
,
18537 "Finishing current line, file %s, address %s\n",
18538 lbasename (subfile
->name
),
18539 paddress (gdbarch
, address
));
18542 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
18546 lnp_state_machine::record_line (bool end_sequence
)
18548 if (dwarf_line_debug
)
18550 fprintf_unfiltered (gdb_stdlog
,
18551 "Processing actual line %u: file %u,"
18552 " address %s, is_stmt %u, discrim %u\n",
18553 m_line
, to_underlying (m_file
),
18554 paddress (m_gdbarch
, m_address
),
18555 m_is_stmt
, m_discriminator
);
18558 file_entry
*fe
= current_file ();
18561 dwarf2_debug_line_missing_file_complaint ();
18562 /* For now we ignore lines not starting on an instruction boundary.
18563 But not when processing end_sequence for compatibility with the
18564 previous version of the code. */
18565 else if (m_op_index
== 0 || end_sequence
)
18567 fe
->included_p
= 1;
18568 if (m_record_lines_p
&& m_is_stmt
)
18570 if (m_last_subfile
!= current_subfile
|| end_sequence
)
18572 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
18573 m_address
, m_record_line_callback
);
18578 if (dwarf_record_line_p (m_line
, m_last_line
,
18579 m_line_has_non_zero_discriminator
,
18582 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
18584 m_record_line_callback
);
18586 m_last_subfile
= current_subfile
;
18587 m_last_line
= m_line
;
18593 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
18594 bool record_lines_p
)
18597 m_record_lines_p
= record_lines_p
;
18598 m_line_header
= lh
;
18600 m_record_line_callback
= ::record_line
;
18602 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
18603 was a line entry for it so that the backend has a chance to adjust it
18604 and also record it in case it needs it. This is currently used by MIPS
18605 code, cf. `mips_adjust_dwarf2_line'. */
18606 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
18607 m_is_stmt
= lh
->default_is_stmt
;
18608 m_discriminator
= 0;
18612 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
18613 const gdb_byte
*line_ptr
,
18614 CORE_ADDR lowpc
, CORE_ADDR address
)
18616 /* If address < lowpc then it's not a usable value, it's outside the
18617 pc range of the CU. However, we restrict the test to only address
18618 values of zero to preserve GDB's previous behaviour which is to
18619 handle the specific case of a function being GC'd by the linker. */
18621 if (address
== 0 && address
< lowpc
)
18623 /* This line table is for a function which has been
18624 GCd by the linker. Ignore it. PR gdb/12528 */
18626 struct objfile
*objfile
= cu
->objfile
;
18627 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
18629 complaint (&symfile_complaints
,
18630 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
18631 line_offset
, objfile_name (objfile
));
18632 m_record_line_callback
= noop_record_line
;
18633 /* Note: record_line_callback is left as noop_record_line until
18634 we see DW_LNE_end_sequence. */
18638 /* Subroutine of dwarf_decode_lines to simplify it.
18639 Process the line number information in LH.
18640 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
18641 program in order to set included_p for every referenced header. */
18644 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
18645 const int decode_for_pst_p
, CORE_ADDR lowpc
)
18647 const gdb_byte
*line_ptr
, *extended_end
;
18648 const gdb_byte
*line_end
;
18649 unsigned int bytes_read
, extended_len
;
18650 unsigned char op_code
, extended_op
;
18651 CORE_ADDR baseaddr
;
18652 struct objfile
*objfile
= cu
->objfile
;
18653 bfd
*abfd
= objfile
->obfd
;
18654 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18655 /* True if we're recording line info (as opposed to building partial
18656 symtabs and just interested in finding include files mentioned by
18657 the line number program). */
18658 bool record_lines_p
= !decode_for_pst_p
;
18660 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18662 line_ptr
= lh
->statement_program_start
;
18663 line_end
= lh
->statement_program_end
;
18665 /* Read the statement sequences until there's nothing left. */
18666 while (line_ptr
< line_end
)
18668 /* The DWARF line number program state machine. Reset the state
18669 machine at the start of each sequence. */
18670 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
18671 bool end_sequence
= false;
18673 if (record_lines_p
)
18675 /* Start a subfile for the current file of the state
18677 const file_entry
*fe
= state_machine
.current_file ();
18680 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
18683 /* Decode the table. */
18684 while (line_ptr
< line_end
&& !end_sequence
)
18686 op_code
= read_1_byte (abfd
, line_ptr
);
18689 if (op_code
>= lh
->opcode_base
)
18691 /* Special opcode. */
18692 state_machine
.handle_special_opcode (op_code
);
18694 else switch (op_code
)
18696 case DW_LNS_extended_op
:
18697 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
18699 line_ptr
+= bytes_read
;
18700 extended_end
= line_ptr
+ extended_len
;
18701 extended_op
= read_1_byte (abfd
, line_ptr
);
18703 switch (extended_op
)
18705 case DW_LNE_end_sequence
:
18706 state_machine
.handle_end_sequence ();
18707 end_sequence
= true;
18709 case DW_LNE_set_address
:
18712 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
18713 line_ptr
+= bytes_read
;
18715 state_machine
.check_line_address (cu
, line_ptr
,
18717 state_machine
.handle_set_address (baseaddr
, address
);
18720 case DW_LNE_define_file
:
18722 const char *cur_file
;
18723 unsigned int mod_time
, length
;
18726 cur_file
= read_direct_string (abfd
, line_ptr
,
18728 line_ptr
+= bytes_read
;
18729 dindex
= (dir_index
)
18730 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18731 line_ptr
+= bytes_read
;
18733 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18734 line_ptr
+= bytes_read
;
18736 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18737 line_ptr
+= bytes_read
;
18738 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
18741 case DW_LNE_set_discriminator
:
18743 /* The discriminator is not interesting to the
18744 debugger; just ignore it. We still need to
18745 check its value though:
18746 if there are consecutive entries for the same
18747 (non-prologue) line we want to coalesce them.
18750 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18751 line_ptr
+= bytes_read
;
18753 state_machine
.handle_set_discriminator (discr
);
18757 complaint (&symfile_complaints
,
18758 _("mangled .debug_line section"));
18761 /* Make sure that we parsed the extended op correctly. If e.g.
18762 we expected a different address size than the producer used,
18763 we may have read the wrong number of bytes. */
18764 if (line_ptr
!= extended_end
)
18766 complaint (&symfile_complaints
,
18767 _("mangled .debug_line section"));
18772 state_machine
.handle_copy ();
18774 case DW_LNS_advance_pc
:
18777 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18778 line_ptr
+= bytes_read
;
18780 state_machine
.handle_advance_pc (adjust
);
18783 case DW_LNS_advance_line
:
18786 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
18787 line_ptr
+= bytes_read
;
18789 state_machine
.handle_advance_line (line_delta
);
18792 case DW_LNS_set_file
:
18794 file_name_index file
18795 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
18797 line_ptr
+= bytes_read
;
18799 state_machine
.handle_set_file (file
);
18802 case DW_LNS_set_column
:
18803 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18804 line_ptr
+= bytes_read
;
18806 case DW_LNS_negate_stmt
:
18807 state_machine
.handle_negate_stmt ();
18809 case DW_LNS_set_basic_block
:
18811 /* Add to the address register of the state machine the
18812 address increment value corresponding to special opcode
18813 255. I.e., this value is scaled by the minimum
18814 instruction length since special opcode 255 would have
18815 scaled the increment. */
18816 case DW_LNS_const_add_pc
:
18817 state_machine
.handle_const_add_pc ();
18819 case DW_LNS_fixed_advance_pc
:
18821 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
18824 state_machine
.handle_fixed_advance_pc (addr_adj
);
18829 /* Unknown standard opcode, ignore it. */
18832 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
18834 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
18835 line_ptr
+= bytes_read
;
18842 dwarf2_debug_line_missing_end_sequence_complaint ();
18844 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
18845 in which case we still finish recording the last line). */
18846 state_machine
.record_line (true);
18850 /* Decode the Line Number Program (LNP) for the given line_header
18851 structure and CU. The actual information extracted and the type
18852 of structures created from the LNP depends on the value of PST.
18854 1. If PST is NULL, then this procedure uses the data from the program
18855 to create all necessary symbol tables, and their linetables.
18857 2. If PST is not NULL, this procedure reads the program to determine
18858 the list of files included by the unit represented by PST, and
18859 builds all the associated partial symbol tables.
18861 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
18862 It is used for relative paths in the line table.
18863 NOTE: When processing partial symtabs (pst != NULL),
18864 comp_dir == pst->dirname.
18866 NOTE: It is important that psymtabs have the same file name (via strcmp)
18867 as the corresponding symtab. Since COMP_DIR is not used in the name of the
18868 symtab we don't use it in the name of the psymtabs we create.
18869 E.g. expand_line_sal requires this when finding psymtabs to expand.
18870 A good testcase for this is mb-inline.exp.
18872 LOWPC is the lowest address in CU (or 0 if not known).
18874 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
18875 for its PC<->lines mapping information. Otherwise only the filename
18876 table is read in. */
18879 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
18880 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
18881 CORE_ADDR lowpc
, int decode_mapping
)
18883 struct objfile
*objfile
= cu
->objfile
;
18884 const int decode_for_pst_p
= (pst
!= NULL
);
18886 if (decode_mapping
)
18887 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
18889 if (decode_for_pst_p
)
18893 /* Now that we're done scanning the Line Header Program, we can
18894 create the psymtab of each included file. */
18895 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
18896 if (lh
->file_names
[file_index
].included_p
== 1)
18898 const char *include_name
=
18899 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
18900 if (include_name
!= NULL
)
18901 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
18906 /* Make sure a symtab is created for every file, even files
18907 which contain only variables (i.e. no code with associated
18909 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
18912 for (i
= 0; i
< lh
->file_names
.size (); i
++)
18914 file_entry
&fe
= lh
->file_names
[i
];
18916 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
18918 if (current_subfile
->symtab
== NULL
)
18920 current_subfile
->symtab
18921 = allocate_symtab (cust
, current_subfile
->name
);
18923 fe
.symtab
= current_subfile
->symtab
;
18928 /* Start a subfile for DWARF. FILENAME is the name of the file and
18929 DIRNAME the name of the source directory which contains FILENAME
18930 or NULL if not known.
18931 This routine tries to keep line numbers from identical absolute and
18932 relative file names in a common subfile.
18934 Using the `list' example from the GDB testsuite, which resides in
18935 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
18936 of /srcdir/list0.c yields the following debugging information for list0.c:
18938 DW_AT_name: /srcdir/list0.c
18939 DW_AT_comp_dir: /compdir
18940 files.files[0].name: list0.h
18941 files.files[0].dir: /srcdir
18942 files.files[1].name: list0.c
18943 files.files[1].dir: /srcdir
18945 The line number information for list0.c has to end up in a single
18946 subfile, so that `break /srcdir/list0.c:1' works as expected.
18947 start_subfile will ensure that this happens provided that we pass the
18948 concatenation of files.files[1].dir and files.files[1].name as the
18952 dwarf2_start_subfile (const char *filename
, const char *dirname
)
18956 /* In order not to lose the line information directory,
18957 we concatenate it to the filename when it makes sense.
18958 Note that the Dwarf3 standard says (speaking of filenames in line
18959 information): ``The directory index is ignored for file names
18960 that represent full path names''. Thus ignoring dirname in the
18961 `else' branch below isn't an issue. */
18963 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
18965 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
18969 start_subfile (filename
);
18975 /* Start a symtab for DWARF.
18976 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
18978 static struct compunit_symtab
*
18979 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
18980 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
18982 struct compunit_symtab
*cust
18983 = start_symtab (cu
->objfile
, name
, comp_dir
, low_pc
);
18985 record_debugformat ("DWARF 2");
18986 record_producer (cu
->producer
);
18988 /* We assume that we're processing GCC output. */
18989 processing_gcc_compilation
= 2;
18991 cu
->processing_has_namespace_info
= 0;
18997 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
18998 struct dwarf2_cu
*cu
)
19000 struct objfile
*objfile
= cu
->objfile
;
19001 struct comp_unit_head
*cu_header
= &cu
->header
;
19003 /* NOTE drow/2003-01-30: There used to be a comment and some special
19004 code here to turn a symbol with DW_AT_external and a
19005 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
19006 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
19007 with some versions of binutils) where shared libraries could have
19008 relocations against symbols in their debug information - the
19009 minimal symbol would have the right address, but the debug info
19010 would not. It's no longer necessary, because we will explicitly
19011 apply relocations when we read in the debug information now. */
19013 /* A DW_AT_location attribute with no contents indicates that a
19014 variable has been optimized away. */
19015 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
19017 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19021 /* Handle one degenerate form of location expression specially, to
19022 preserve GDB's previous behavior when section offsets are
19023 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
19024 then mark this symbol as LOC_STATIC. */
19026 if (attr_form_is_block (attr
)
19027 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
19028 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
19029 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
19030 && (DW_BLOCK (attr
)->size
19031 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
19033 unsigned int dummy
;
19035 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
19036 SYMBOL_VALUE_ADDRESS (sym
) =
19037 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
19039 SYMBOL_VALUE_ADDRESS (sym
) =
19040 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
19041 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
19042 fixup_symbol_section (sym
, objfile
);
19043 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
19044 SYMBOL_SECTION (sym
));
19048 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
19049 expression evaluator, and use LOC_COMPUTED only when necessary
19050 (i.e. when the value of a register or memory location is
19051 referenced, or a thread-local block, etc.). Then again, it might
19052 not be worthwhile. I'm assuming that it isn't unless performance
19053 or memory numbers show me otherwise. */
19055 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
19057 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
19058 cu
->has_loclist
= 1;
19061 /* Given a pointer to a DWARF information entry, figure out if we need
19062 to make a symbol table entry for it, and if so, create a new entry
19063 and return a pointer to it.
19064 If TYPE is NULL, determine symbol type from the die, otherwise
19065 used the passed type.
19066 If SPACE is not NULL, use it to hold the new symbol. If it is
19067 NULL, allocate a new symbol on the objfile's obstack. */
19069 static struct symbol
*
19070 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
19071 struct symbol
*space
)
19073 struct objfile
*objfile
= cu
->objfile
;
19074 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19075 struct symbol
*sym
= NULL
;
19077 struct attribute
*attr
= NULL
;
19078 struct attribute
*attr2
= NULL
;
19079 CORE_ADDR baseaddr
;
19080 struct pending
**list_to_add
= NULL
;
19082 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
19084 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19086 name
= dwarf2_name (die
, cu
);
19089 const char *linkagename
;
19090 int suppress_add
= 0;
19095 sym
= allocate_symbol (objfile
);
19096 OBJSTAT (objfile
, n_syms
++);
19098 /* Cache this symbol's name and the name's demangled form (if any). */
19099 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
19100 linkagename
= dwarf2_physname (name
, die
, cu
);
19101 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
19103 /* Fortran does not have mangling standard and the mangling does differ
19104 between gfortran, iFort etc. */
19105 if (cu
->language
== language_fortran
19106 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
19107 symbol_set_demangled_name (&(sym
->ginfo
),
19108 dwarf2_full_name (name
, die
, cu
),
19111 /* Default assumptions.
19112 Use the passed type or decode it from the die. */
19113 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19114 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
19116 SYMBOL_TYPE (sym
) = type
;
19118 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
19119 attr
= dwarf2_attr (die
,
19120 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
19124 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
19127 attr
= dwarf2_attr (die
,
19128 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
19132 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
19133 struct file_entry
*fe
;
19135 if (cu
->line_header
!= NULL
)
19136 fe
= cu
->line_header
->file_name_at (file_index
);
19141 complaint (&symfile_complaints
,
19142 _("file index out of range"));
19144 symbol_set_symtab (sym
, fe
->symtab
);
19150 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
19155 addr
= attr_value_as_address (attr
);
19156 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
19157 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
19159 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
19160 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
19161 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
19162 add_symbol_to_list (sym
, cu
->list_in_scope
);
19164 case DW_TAG_subprogram
:
19165 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
19167 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
19168 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19169 if ((attr2
&& (DW_UNSND (attr2
) != 0))
19170 || cu
->language
== language_ada
)
19172 /* Subprograms marked external are stored as a global symbol.
19173 Ada subprograms, whether marked external or not, are always
19174 stored as a global symbol, because we want to be able to
19175 access them globally. For instance, we want to be able
19176 to break on a nested subprogram without having to
19177 specify the context. */
19178 list_to_add
= &global_symbols
;
19182 list_to_add
= cu
->list_in_scope
;
19185 case DW_TAG_inlined_subroutine
:
19186 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
19188 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
19189 SYMBOL_INLINED (sym
) = 1;
19190 list_to_add
= cu
->list_in_scope
;
19192 case DW_TAG_template_value_param
:
19194 /* Fall through. */
19195 case DW_TAG_constant
:
19196 case DW_TAG_variable
:
19197 case DW_TAG_member
:
19198 /* Compilation with minimal debug info may result in
19199 variables with missing type entries. Change the
19200 misleading `void' type to something sensible. */
19201 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
19202 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
19204 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19205 /* In the case of DW_TAG_member, we should only be called for
19206 static const members. */
19207 if (die
->tag
== DW_TAG_member
)
19209 /* dwarf2_add_field uses die_is_declaration,
19210 so we do the same. */
19211 gdb_assert (die_is_declaration (die
, cu
));
19216 dwarf2_const_value (attr
, sym
, cu
);
19217 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19220 if (attr2
&& (DW_UNSND (attr2
) != 0))
19221 list_to_add
= &global_symbols
;
19223 list_to_add
= cu
->list_in_scope
;
19227 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19230 var_decode_location (attr
, sym
, cu
);
19231 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19233 /* Fortran explicitly imports any global symbols to the local
19234 scope by DW_TAG_common_block. */
19235 if (cu
->language
== language_fortran
&& die
->parent
19236 && die
->parent
->tag
== DW_TAG_common_block
)
19239 if (SYMBOL_CLASS (sym
) == LOC_STATIC
19240 && SYMBOL_VALUE_ADDRESS (sym
) == 0
19241 && !dwarf2_per_objfile
->has_section_at_zero
)
19243 /* When a static variable is eliminated by the linker,
19244 the corresponding debug information is not stripped
19245 out, but the variable address is set to null;
19246 do not add such variables into symbol table. */
19248 else if (attr2
&& (DW_UNSND (attr2
) != 0))
19250 /* Workaround gfortran PR debug/40040 - it uses
19251 DW_AT_location for variables in -fPIC libraries which may
19252 get overriden by other libraries/executable and get
19253 a different address. Resolve it by the minimal symbol
19254 which may come from inferior's executable using copy
19255 relocation. Make this workaround only for gfortran as for
19256 other compilers GDB cannot guess the minimal symbol
19257 Fortran mangling kind. */
19258 if (cu
->language
== language_fortran
&& die
->parent
19259 && die
->parent
->tag
== DW_TAG_module
19261 && startswith (cu
->producer
, "GNU Fortran"))
19262 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
19264 /* A variable with DW_AT_external is never static,
19265 but it may be block-scoped. */
19266 list_to_add
= (cu
->list_in_scope
== &file_symbols
19267 ? &global_symbols
: cu
->list_in_scope
);
19270 list_to_add
= cu
->list_in_scope
;
19274 /* We do not know the address of this symbol.
19275 If it is an external symbol and we have type information
19276 for it, enter the symbol as a LOC_UNRESOLVED symbol.
19277 The address of the variable will then be determined from
19278 the minimal symbol table whenever the variable is
19280 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
19282 /* Fortran explicitly imports any global symbols to the local
19283 scope by DW_TAG_common_block. */
19284 if (cu
->language
== language_fortran
&& die
->parent
19285 && die
->parent
->tag
== DW_TAG_common_block
)
19287 /* SYMBOL_CLASS doesn't matter here because
19288 read_common_block is going to reset it. */
19290 list_to_add
= cu
->list_in_scope
;
19292 else if (attr2
&& (DW_UNSND (attr2
) != 0)
19293 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
19295 /* A variable with DW_AT_external is never static, but it
19296 may be block-scoped. */
19297 list_to_add
= (cu
->list_in_scope
== &file_symbols
19298 ? &global_symbols
: cu
->list_in_scope
);
19300 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
19302 else if (!die_is_declaration (die
, cu
))
19304 /* Use the default LOC_OPTIMIZED_OUT class. */
19305 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
19307 list_to_add
= cu
->list_in_scope
;
19311 case DW_TAG_formal_parameter
:
19312 /* If we are inside a function, mark this as an argument. If
19313 not, we might be looking at an argument to an inlined function
19314 when we do not have enough information to show inlined frames;
19315 pretend it's a local variable in that case so that the user can
19317 if (context_stack_depth
> 0
19318 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
19319 SYMBOL_IS_ARGUMENT (sym
) = 1;
19320 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
19323 var_decode_location (attr
, sym
, cu
);
19325 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19328 dwarf2_const_value (attr
, sym
, cu
);
19331 list_to_add
= cu
->list_in_scope
;
19333 case DW_TAG_unspecified_parameters
:
19334 /* From varargs functions; gdb doesn't seem to have any
19335 interest in this information, so just ignore it for now.
19338 case DW_TAG_template_type_param
:
19340 /* Fall through. */
19341 case DW_TAG_class_type
:
19342 case DW_TAG_interface_type
:
19343 case DW_TAG_structure_type
:
19344 case DW_TAG_union_type
:
19345 case DW_TAG_set_type
:
19346 case DW_TAG_enumeration_type
:
19347 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19348 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
19351 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
19352 really ever be static objects: otherwise, if you try
19353 to, say, break of a class's method and you're in a file
19354 which doesn't mention that class, it won't work unless
19355 the check for all static symbols in lookup_symbol_aux
19356 saves you. See the OtherFileClass tests in
19357 gdb.c++/namespace.exp. */
19361 list_to_add
= (cu
->list_in_scope
== &file_symbols
19362 && cu
->language
== language_cplus
19363 ? &global_symbols
: cu
->list_in_scope
);
19365 /* The semantics of C++ state that "struct foo {
19366 ... }" also defines a typedef for "foo". */
19367 if (cu
->language
== language_cplus
19368 || cu
->language
== language_ada
19369 || cu
->language
== language_d
19370 || cu
->language
== language_rust
)
19372 /* The symbol's name is already allocated along
19373 with this objfile, so we don't need to
19374 duplicate it for the type. */
19375 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
19376 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
19381 case DW_TAG_typedef
:
19382 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19383 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19384 list_to_add
= cu
->list_in_scope
;
19386 case DW_TAG_base_type
:
19387 case DW_TAG_subrange_type
:
19388 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19389 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
19390 list_to_add
= cu
->list_in_scope
;
19392 case DW_TAG_enumerator
:
19393 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
19396 dwarf2_const_value (attr
, sym
, cu
);
19399 /* NOTE: carlton/2003-11-10: See comment above in the
19400 DW_TAG_class_type, etc. block. */
19402 list_to_add
= (cu
->list_in_scope
== &file_symbols
19403 && cu
->language
== language_cplus
19404 ? &global_symbols
: cu
->list_in_scope
);
19407 case DW_TAG_imported_declaration
:
19408 case DW_TAG_namespace
:
19409 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19410 list_to_add
= &global_symbols
;
19412 case DW_TAG_module
:
19413 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
19414 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
19415 list_to_add
= &global_symbols
;
19417 case DW_TAG_common_block
:
19418 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
19419 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
19420 add_symbol_to_list (sym
, cu
->list_in_scope
);
19423 /* Not a tag we recognize. Hopefully we aren't processing
19424 trash data, but since we must specifically ignore things
19425 we don't recognize, there is nothing else we should do at
19427 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
19428 dwarf_tag_name (die
->tag
));
19434 sym
->hash_next
= objfile
->template_symbols
;
19435 objfile
->template_symbols
= sym
;
19436 list_to_add
= NULL
;
19439 if (list_to_add
!= NULL
)
19440 add_symbol_to_list (sym
, list_to_add
);
19442 /* For the benefit of old versions of GCC, check for anonymous
19443 namespaces based on the demangled name. */
19444 if (!cu
->processing_has_namespace_info
19445 && cu
->language
== language_cplus
)
19446 cp_scan_for_anonymous_namespaces (sym
, objfile
);
19451 /* A wrapper for new_symbol_full that always allocates a new symbol. */
19453 static struct symbol
*
19454 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
19456 return new_symbol_full (die
, type
, cu
, NULL
);
19459 /* Given an attr with a DW_FORM_dataN value in host byte order,
19460 zero-extend it as appropriate for the symbol's type. The DWARF
19461 standard (v4) is not entirely clear about the meaning of using
19462 DW_FORM_dataN for a constant with a signed type, where the type is
19463 wider than the data. The conclusion of a discussion on the DWARF
19464 list was that this is unspecified. We choose to always zero-extend
19465 because that is the interpretation long in use by GCC. */
19468 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
19469 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
19471 struct objfile
*objfile
= cu
->objfile
;
19472 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
19473 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
19474 LONGEST l
= DW_UNSND (attr
);
19476 if (bits
< sizeof (*value
) * 8)
19478 l
&= ((LONGEST
) 1 << bits
) - 1;
19481 else if (bits
== sizeof (*value
) * 8)
19485 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
19486 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
19493 /* Read a constant value from an attribute. Either set *VALUE, or if
19494 the value does not fit in *VALUE, set *BYTES - either already
19495 allocated on the objfile obstack, or newly allocated on OBSTACK,
19496 or, set *BATON, if we translated the constant to a location
19500 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
19501 const char *name
, struct obstack
*obstack
,
19502 struct dwarf2_cu
*cu
,
19503 LONGEST
*value
, const gdb_byte
**bytes
,
19504 struct dwarf2_locexpr_baton
**baton
)
19506 struct objfile
*objfile
= cu
->objfile
;
19507 struct comp_unit_head
*cu_header
= &cu
->header
;
19508 struct dwarf_block
*blk
;
19509 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
19510 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
19516 switch (attr
->form
)
19519 case DW_FORM_GNU_addr_index
:
19523 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
19524 dwarf2_const_value_length_mismatch_complaint (name
,
19525 cu_header
->addr_size
,
19526 TYPE_LENGTH (type
));
19527 /* Symbols of this form are reasonably rare, so we just
19528 piggyback on the existing location code rather than writing
19529 a new implementation of symbol_computed_ops. */
19530 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
19531 (*baton
)->per_cu
= cu
->per_cu
;
19532 gdb_assert ((*baton
)->per_cu
);
19534 (*baton
)->size
= 2 + cu_header
->addr_size
;
19535 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
19536 (*baton
)->data
= data
;
19538 data
[0] = DW_OP_addr
;
19539 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
19540 byte_order
, DW_ADDR (attr
));
19541 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
19544 case DW_FORM_string
:
19546 case DW_FORM_GNU_str_index
:
19547 case DW_FORM_GNU_strp_alt
:
19548 /* DW_STRING is already allocated on the objfile obstack, point
19550 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
19552 case DW_FORM_block1
:
19553 case DW_FORM_block2
:
19554 case DW_FORM_block4
:
19555 case DW_FORM_block
:
19556 case DW_FORM_exprloc
:
19557 case DW_FORM_data16
:
19558 blk
= DW_BLOCK (attr
);
19559 if (TYPE_LENGTH (type
) != blk
->size
)
19560 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
19561 TYPE_LENGTH (type
));
19562 *bytes
= blk
->data
;
19565 /* The DW_AT_const_value attributes are supposed to carry the
19566 symbol's value "represented as it would be on the target
19567 architecture." By the time we get here, it's already been
19568 converted to host endianness, so we just need to sign- or
19569 zero-extend it as appropriate. */
19570 case DW_FORM_data1
:
19571 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
19573 case DW_FORM_data2
:
19574 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
19576 case DW_FORM_data4
:
19577 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
19579 case DW_FORM_data8
:
19580 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
19583 case DW_FORM_sdata
:
19584 case DW_FORM_implicit_const
:
19585 *value
= DW_SND (attr
);
19588 case DW_FORM_udata
:
19589 *value
= DW_UNSND (attr
);
19593 complaint (&symfile_complaints
,
19594 _("unsupported const value attribute form: '%s'"),
19595 dwarf_form_name (attr
->form
));
19602 /* Copy constant value from an attribute to a symbol. */
19605 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
19606 struct dwarf2_cu
*cu
)
19608 struct objfile
*objfile
= cu
->objfile
;
19610 const gdb_byte
*bytes
;
19611 struct dwarf2_locexpr_baton
*baton
;
19613 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
19614 SYMBOL_PRINT_NAME (sym
),
19615 &objfile
->objfile_obstack
, cu
,
19616 &value
, &bytes
, &baton
);
19620 SYMBOL_LOCATION_BATON (sym
) = baton
;
19621 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
19623 else if (bytes
!= NULL
)
19625 SYMBOL_VALUE_BYTES (sym
) = bytes
;
19626 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
19630 SYMBOL_VALUE (sym
) = value
;
19631 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
19635 /* Return the type of the die in question using its DW_AT_type attribute. */
19637 static struct type
*
19638 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19640 struct attribute
*type_attr
;
19642 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
19645 /* A missing DW_AT_type represents a void type. */
19646 return objfile_type (cu
->objfile
)->builtin_void
;
19649 return lookup_die_type (die
, type_attr
, cu
);
19652 /* True iff CU's producer generates GNAT Ada auxiliary information
19653 that allows to find parallel types through that information instead
19654 of having to do expensive parallel lookups by type name. */
19657 need_gnat_info (struct dwarf2_cu
*cu
)
19659 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
19660 of GNAT produces this auxiliary information, without any indication
19661 that it is produced. Part of enhancing the FSF version of GNAT
19662 to produce that information will be to put in place an indicator
19663 that we can use in order to determine whether the descriptive type
19664 info is available or not. One suggestion that has been made is
19665 to use a new attribute, attached to the CU die. For now, assume
19666 that the descriptive type info is not available. */
19670 /* Return the auxiliary type of the die in question using its
19671 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
19672 attribute is not present. */
19674 static struct type
*
19675 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19677 struct attribute
*type_attr
;
19679 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
19683 return lookup_die_type (die
, type_attr
, cu
);
19686 /* If DIE has a descriptive_type attribute, then set the TYPE's
19687 descriptive type accordingly. */
19690 set_descriptive_type (struct type
*type
, struct die_info
*die
,
19691 struct dwarf2_cu
*cu
)
19693 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
19695 if (descriptive_type
)
19697 ALLOCATE_GNAT_AUX_TYPE (type
);
19698 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
19702 /* Return the containing type of the die in question using its
19703 DW_AT_containing_type attribute. */
19705 static struct type
*
19706 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19708 struct attribute
*type_attr
;
19710 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
19712 error (_("Dwarf Error: Problem turning containing type into gdb type "
19713 "[in module %s]"), objfile_name (cu
->objfile
));
19715 return lookup_die_type (die
, type_attr
, cu
);
19718 /* Return an error marker type to use for the ill formed type in DIE/CU. */
19720 static struct type
*
19721 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
19723 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19724 char *message
, *saved
;
19726 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
19727 objfile_name (objfile
),
19728 to_underlying (cu
->header
.sect_off
),
19729 to_underlying (die
->sect_off
));
19730 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
19731 message
, strlen (message
));
19734 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
19737 /* Look up the type of DIE in CU using its type attribute ATTR.
19738 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
19739 DW_AT_containing_type.
19740 If there is no type substitute an error marker. */
19742 static struct type
*
19743 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
19744 struct dwarf2_cu
*cu
)
19746 struct objfile
*objfile
= cu
->objfile
;
19747 struct type
*this_type
;
19749 gdb_assert (attr
->name
== DW_AT_type
19750 || attr
->name
== DW_AT_GNAT_descriptive_type
19751 || attr
->name
== DW_AT_containing_type
);
19753 /* First see if we have it cached. */
19755 if (attr
->form
== DW_FORM_GNU_ref_alt
)
19757 struct dwarf2_per_cu_data
*per_cu
;
19758 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
19760 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1, cu
->objfile
);
19761 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
19763 else if (attr_form_is_ref (attr
))
19765 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
19767 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
19769 else if (attr
->form
== DW_FORM_ref_sig8
)
19771 ULONGEST signature
= DW_SIGNATURE (attr
);
19773 return get_signatured_type (die
, signature
, cu
);
19777 complaint (&symfile_complaints
,
19778 _("Dwarf Error: Bad type attribute %s in DIE"
19779 " at 0x%x [in module %s]"),
19780 dwarf_attr_name (attr
->name
), to_underlying (die
->sect_off
),
19781 objfile_name (objfile
));
19782 return build_error_marker_type (cu
, die
);
19785 /* If not cached we need to read it in. */
19787 if (this_type
== NULL
)
19789 struct die_info
*type_die
= NULL
;
19790 struct dwarf2_cu
*type_cu
= cu
;
19792 if (attr_form_is_ref (attr
))
19793 type_die
= follow_die_ref (die
, attr
, &type_cu
);
19794 if (type_die
== NULL
)
19795 return build_error_marker_type (cu
, die
);
19796 /* If we find the type now, it's probably because the type came
19797 from an inter-CU reference and the type's CU got expanded before
19799 this_type
= read_type_die (type_die
, type_cu
);
19802 /* If we still don't have a type use an error marker. */
19804 if (this_type
== NULL
)
19805 return build_error_marker_type (cu
, die
);
19810 /* Return the type in DIE, CU.
19811 Returns NULL for invalid types.
19813 This first does a lookup in die_type_hash,
19814 and only reads the die in if necessary.
19816 NOTE: This can be called when reading in partial or full symbols. */
19818 static struct type
*
19819 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
19821 struct type
*this_type
;
19823 this_type
= get_die_type (die
, cu
);
19827 return read_type_die_1 (die
, cu
);
19830 /* Read the type in DIE, CU.
19831 Returns NULL for invalid types. */
19833 static struct type
*
19834 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
19836 struct type
*this_type
= NULL
;
19840 case DW_TAG_class_type
:
19841 case DW_TAG_interface_type
:
19842 case DW_TAG_structure_type
:
19843 case DW_TAG_union_type
:
19844 this_type
= read_structure_type (die
, cu
);
19846 case DW_TAG_enumeration_type
:
19847 this_type
= read_enumeration_type (die
, cu
);
19849 case DW_TAG_subprogram
:
19850 case DW_TAG_subroutine_type
:
19851 case DW_TAG_inlined_subroutine
:
19852 this_type
= read_subroutine_type (die
, cu
);
19854 case DW_TAG_array_type
:
19855 this_type
= read_array_type (die
, cu
);
19857 case DW_TAG_set_type
:
19858 this_type
= read_set_type (die
, cu
);
19860 case DW_TAG_pointer_type
:
19861 this_type
= read_tag_pointer_type (die
, cu
);
19863 case DW_TAG_ptr_to_member_type
:
19864 this_type
= read_tag_ptr_to_member_type (die
, cu
);
19866 case DW_TAG_reference_type
:
19867 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
19869 case DW_TAG_rvalue_reference_type
:
19870 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
19872 case DW_TAG_const_type
:
19873 this_type
= read_tag_const_type (die
, cu
);
19875 case DW_TAG_volatile_type
:
19876 this_type
= read_tag_volatile_type (die
, cu
);
19878 case DW_TAG_restrict_type
:
19879 this_type
= read_tag_restrict_type (die
, cu
);
19881 case DW_TAG_string_type
:
19882 this_type
= read_tag_string_type (die
, cu
);
19884 case DW_TAG_typedef
:
19885 this_type
= read_typedef (die
, cu
);
19887 case DW_TAG_subrange_type
:
19888 this_type
= read_subrange_type (die
, cu
);
19890 case DW_TAG_base_type
:
19891 this_type
= read_base_type (die
, cu
);
19893 case DW_TAG_unspecified_type
:
19894 this_type
= read_unspecified_type (die
, cu
);
19896 case DW_TAG_namespace
:
19897 this_type
= read_namespace_type (die
, cu
);
19899 case DW_TAG_module
:
19900 this_type
= read_module_type (die
, cu
);
19902 case DW_TAG_atomic_type
:
19903 this_type
= read_tag_atomic_type (die
, cu
);
19906 complaint (&symfile_complaints
,
19907 _("unexpected tag in read_type_die: '%s'"),
19908 dwarf_tag_name (die
->tag
));
19915 /* See if we can figure out if the class lives in a namespace. We do
19916 this by looking for a member function; its demangled name will
19917 contain namespace info, if there is any.
19918 Return the computed name or NULL.
19919 Space for the result is allocated on the objfile's obstack.
19920 This is the full-die version of guess_partial_die_structure_name.
19921 In this case we know DIE has no useful parent. */
19924 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19926 struct die_info
*spec_die
;
19927 struct dwarf2_cu
*spec_cu
;
19928 struct die_info
*child
;
19931 spec_die
= die_specification (die
, &spec_cu
);
19932 if (spec_die
!= NULL
)
19938 for (child
= die
->child
;
19940 child
= child
->sibling
)
19942 if (child
->tag
== DW_TAG_subprogram
)
19944 const char *linkage_name
= dw2_linkage_name (child
, cu
);
19946 if (linkage_name
!= NULL
)
19949 = language_class_name_from_physname (cu
->language_defn
,
19953 if (actual_name
!= NULL
)
19955 const char *die_name
= dwarf2_name (die
, cu
);
19957 if (die_name
!= NULL
19958 && strcmp (die_name
, actual_name
) != 0)
19960 /* Strip off the class name from the full name.
19961 We want the prefix. */
19962 int die_name_len
= strlen (die_name
);
19963 int actual_name_len
= strlen (actual_name
);
19965 /* Test for '::' as a sanity check. */
19966 if (actual_name_len
> die_name_len
+ 2
19967 && actual_name
[actual_name_len
19968 - die_name_len
- 1] == ':')
19969 name
= (char *) obstack_copy0 (
19970 &cu
->objfile
->per_bfd
->storage_obstack
,
19971 actual_name
, actual_name_len
- die_name_len
- 2);
19974 xfree (actual_name
);
19983 /* GCC might emit a nameless typedef that has a linkage name. Determine the
19984 prefix part in such case. See
19985 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19987 static const char *
19988 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
19990 struct attribute
*attr
;
19993 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
19994 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
19997 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
20000 attr
= dw2_linkage_name_attr (die
, cu
);
20001 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
20004 /* dwarf2_name had to be already called. */
20005 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
20007 /* Strip the base name, keep any leading namespaces/classes. */
20008 base
= strrchr (DW_STRING (attr
), ':');
20009 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
20012 return (char *) obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
20014 &base
[-1] - DW_STRING (attr
));
20017 /* Return the name of the namespace/class that DIE is defined within,
20018 or "" if we can't tell. The caller should not xfree the result.
20020 For example, if we're within the method foo() in the following
20030 then determine_prefix on foo's die will return "N::C". */
20032 static const char *
20033 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
20035 struct die_info
*parent
, *spec_die
;
20036 struct dwarf2_cu
*spec_cu
;
20037 struct type
*parent_type
;
20038 const char *retval
;
20040 if (cu
->language
!= language_cplus
20041 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
20042 && cu
->language
!= language_rust
)
20045 retval
= anonymous_struct_prefix (die
, cu
);
20049 /* We have to be careful in the presence of DW_AT_specification.
20050 For example, with GCC 3.4, given the code
20054 // Definition of N::foo.
20058 then we'll have a tree of DIEs like this:
20060 1: DW_TAG_compile_unit
20061 2: DW_TAG_namespace // N
20062 3: DW_TAG_subprogram // declaration of N::foo
20063 4: DW_TAG_subprogram // definition of N::foo
20064 DW_AT_specification // refers to die #3
20066 Thus, when processing die #4, we have to pretend that we're in
20067 the context of its DW_AT_specification, namely the contex of die
20070 spec_die
= die_specification (die
, &spec_cu
);
20071 if (spec_die
== NULL
)
20072 parent
= die
->parent
;
20075 parent
= spec_die
->parent
;
20079 if (parent
== NULL
)
20081 else if (parent
->building_fullname
)
20084 const char *parent_name
;
20086 /* It has been seen on RealView 2.2 built binaries,
20087 DW_TAG_template_type_param types actually _defined_ as
20088 children of the parent class:
20091 template class <class Enum> Class{};
20092 Class<enum E> class_e;
20094 1: DW_TAG_class_type (Class)
20095 2: DW_TAG_enumeration_type (E)
20096 3: DW_TAG_enumerator (enum1:0)
20097 3: DW_TAG_enumerator (enum2:1)
20099 2: DW_TAG_template_type_param
20100 DW_AT_type DW_FORM_ref_udata (E)
20102 Besides being broken debug info, it can put GDB into an
20103 infinite loop. Consider:
20105 When we're building the full name for Class<E>, we'll start
20106 at Class, and go look over its template type parameters,
20107 finding E. We'll then try to build the full name of E, and
20108 reach here. We're now trying to build the full name of E,
20109 and look over the parent DIE for containing scope. In the
20110 broken case, if we followed the parent DIE of E, we'd again
20111 find Class, and once again go look at its template type
20112 arguments, etc., etc. Simply don't consider such parent die
20113 as source-level parent of this die (it can't be, the language
20114 doesn't allow it), and break the loop here. */
20115 name
= dwarf2_name (die
, cu
);
20116 parent_name
= dwarf2_name (parent
, cu
);
20117 complaint (&symfile_complaints
,
20118 _("template param type '%s' defined within parent '%s'"),
20119 name
? name
: "<unknown>",
20120 parent_name
? parent_name
: "<unknown>");
20124 switch (parent
->tag
)
20126 case DW_TAG_namespace
:
20127 parent_type
= read_type_die (parent
, cu
);
20128 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
20129 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
20130 Work around this problem here. */
20131 if (cu
->language
== language_cplus
20132 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
20134 /* We give a name to even anonymous namespaces. */
20135 return TYPE_TAG_NAME (parent_type
);
20136 case DW_TAG_class_type
:
20137 case DW_TAG_interface_type
:
20138 case DW_TAG_structure_type
:
20139 case DW_TAG_union_type
:
20140 case DW_TAG_module
:
20141 parent_type
= read_type_die (parent
, cu
);
20142 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20143 return TYPE_TAG_NAME (parent_type
);
20145 /* An anonymous structure is only allowed non-static data
20146 members; no typedefs, no member functions, et cetera.
20147 So it does not need a prefix. */
20149 case DW_TAG_compile_unit
:
20150 case DW_TAG_partial_unit
:
20151 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
20152 if (cu
->language
== language_cplus
20153 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
20154 && die
->child
!= NULL
20155 && (die
->tag
== DW_TAG_class_type
20156 || die
->tag
== DW_TAG_structure_type
20157 || die
->tag
== DW_TAG_union_type
))
20159 char *name
= guess_full_die_structure_name (die
, cu
);
20164 case DW_TAG_enumeration_type
:
20165 parent_type
= read_type_die (parent
, cu
);
20166 if (TYPE_DECLARED_CLASS (parent_type
))
20168 if (TYPE_TAG_NAME (parent_type
) != NULL
)
20169 return TYPE_TAG_NAME (parent_type
);
20172 /* Fall through. */
20174 return determine_prefix (parent
, cu
);
20178 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
20179 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
20180 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
20181 an obconcat, otherwise allocate storage for the result. The CU argument is
20182 used to determine the language and hence, the appropriate separator. */
20184 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
20187 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
20188 int physname
, struct dwarf2_cu
*cu
)
20190 const char *lead
= "";
20193 if (suffix
== NULL
|| suffix
[0] == '\0'
20194 || prefix
== NULL
|| prefix
[0] == '\0')
20196 else if (cu
->language
== language_d
)
20198 /* For D, the 'main' function could be defined in any module, but it
20199 should never be prefixed. */
20200 if (strcmp (suffix
, "D main") == 0)
20208 else if (cu
->language
== language_fortran
&& physname
)
20210 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
20211 DW_AT_MIPS_linkage_name is preferred and used instead. */
20219 if (prefix
== NULL
)
20221 if (suffix
== NULL
)
20228 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
20230 strcpy (retval
, lead
);
20231 strcat (retval
, prefix
);
20232 strcat (retval
, sep
);
20233 strcat (retval
, suffix
);
20238 /* We have an obstack. */
20239 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
20243 /* Return sibling of die, NULL if no sibling. */
20245 static struct die_info
*
20246 sibling_die (struct die_info
*die
)
20248 return die
->sibling
;
20251 /* Get name of a die, return NULL if not found. */
20253 static const char *
20254 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
20255 struct obstack
*obstack
)
20257 if (name
&& cu
->language
== language_cplus
)
20259 std::string canon_name
= cp_canonicalize_string (name
);
20261 if (!canon_name
.empty ())
20263 if (canon_name
!= name
)
20264 name
= (const char *) obstack_copy0 (obstack
,
20265 canon_name
.c_str (),
20266 canon_name
.length ());
20273 /* Get name of a die, return NULL if not found.
20274 Anonymous namespaces are converted to their magic string. */
20276 static const char *
20277 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20279 struct attribute
*attr
;
20281 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
20282 if ((!attr
|| !DW_STRING (attr
))
20283 && die
->tag
!= DW_TAG_namespace
20284 && die
->tag
!= DW_TAG_class_type
20285 && die
->tag
!= DW_TAG_interface_type
20286 && die
->tag
!= DW_TAG_structure_type
20287 && die
->tag
!= DW_TAG_union_type
)
20292 case DW_TAG_compile_unit
:
20293 case DW_TAG_partial_unit
:
20294 /* Compilation units have a DW_AT_name that is a filename, not
20295 a source language identifier. */
20296 case DW_TAG_enumeration_type
:
20297 case DW_TAG_enumerator
:
20298 /* These tags always have simple identifiers already; no need
20299 to canonicalize them. */
20300 return DW_STRING (attr
);
20302 case DW_TAG_namespace
:
20303 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
20304 return DW_STRING (attr
);
20305 return CP_ANONYMOUS_NAMESPACE_STR
;
20307 case DW_TAG_class_type
:
20308 case DW_TAG_interface_type
:
20309 case DW_TAG_structure_type
:
20310 case DW_TAG_union_type
:
20311 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
20312 structures or unions. These were of the form "._%d" in GCC 4.1,
20313 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
20314 and GCC 4.4. We work around this problem by ignoring these. */
20315 if (attr
&& DW_STRING (attr
)
20316 && (startswith (DW_STRING (attr
), "._")
20317 || startswith (DW_STRING (attr
), "<anonymous")))
20320 /* GCC might emit a nameless typedef that has a linkage name. See
20321 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
20322 if (!attr
|| DW_STRING (attr
) == NULL
)
20324 char *demangled
= NULL
;
20326 attr
= dw2_linkage_name_attr (die
, cu
);
20327 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
20330 /* Avoid demangling DW_STRING (attr) the second time on a second
20331 call for the same DIE. */
20332 if (!DW_STRING_IS_CANONICAL (attr
))
20333 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
20339 /* FIXME: we already did this for the partial symbol... */
20342 obstack_copy0 (&cu
->objfile
->per_bfd
->storage_obstack
,
20343 demangled
, strlen (demangled
)));
20344 DW_STRING_IS_CANONICAL (attr
) = 1;
20347 /* Strip any leading namespaces/classes, keep only the base name.
20348 DW_AT_name for named DIEs does not contain the prefixes. */
20349 base
= strrchr (DW_STRING (attr
), ':');
20350 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
20353 return DW_STRING (attr
);
20362 if (!DW_STRING_IS_CANONICAL (attr
))
20365 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
20366 &cu
->objfile
->per_bfd
->storage_obstack
);
20367 DW_STRING_IS_CANONICAL (attr
) = 1;
20369 return DW_STRING (attr
);
20372 /* Return the die that this die in an extension of, or NULL if there
20373 is none. *EXT_CU is the CU containing DIE on input, and the CU
20374 containing the return value on output. */
20376 static struct die_info
*
20377 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
20379 struct attribute
*attr
;
20381 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
20385 return follow_die_ref (die
, attr
, ext_cu
);
20388 /* Convert a DIE tag into its string name. */
20390 static const char *
20391 dwarf_tag_name (unsigned tag
)
20393 const char *name
= get_DW_TAG_name (tag
);
20396 return "DW_TAG_<unknown>";
20401 /* Convert a DWARF attribute code into its string name. */
20403 static const char *
20404 dwarf_attr_name (unsigned attr
)
20408 #ifdef MIPS /* collides with DW_AT_HP_block_index */
20409 if (attr
== DW_AT_MIPS_fde
)
20410 return "DW_AT_MIPS_fde";
20412 if (attr
== DW_AT_HP_block_index
)
20413 return "DW_AT_HP_block_index";
20416 name
= get_DW_AT_name (attr
);
20419 return "DW_AT_<unknown>";
20424 /* Convert a DWARF value form code into its string name. */
20426 static const char *
20427 dwarf_form_name (unsigned form
)
20429 const char *name
= get_DW_FORM_name (form
);
20432 return "DW_FORM_<unknown>";
20437 static const char *
20438 dwarf_bool_name (unsigned mybool
)
20446 /* Convert a DWARF type code into its string name. */
20448 static const char *
20449 dwarf_type_encoding_name (unsigned enc
)
20451 const char *name
= get_DW_ATE_name (enc
);
20454 return "DW_ATE_<unknown>";
20460 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
20464 print_spaces (indent
, f
);
20465 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
20466 dwarf_tag_name (die
->tag
), die
->abbrev
,
20467 to_underlying (die
->sect_off
));
20469 if (die
->parent
!= NULL
)
20471 print_spaces (indent
, f
);
20472 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
20473 to_underlying (die
->parent
->sect_off
));
20476 print_spaces (indent
, f
);
20477 fprintf_unfiltered (f
, " has children: %s\n",
20478 dwarf_bool_name (die
->child
!= NULL
));
20480 print_spaces (indent
, f
);
20481 fprintf_unfiltered (f
, " attributes:\n");
20483 for (i
= 0; i
< die
->num_attrs
; ++i
)
20485 print_spaces (indent
, f
);
20486 fprintf_unfiltered (f
, " %s (%s) ",
20487 dwarf_attr_name (die
->attrs
[i
].name
),
20488 dwarf_form_name (die
->attrs
[i
].form
));
20490 switch (die
->attrs
[i
].form
)
20493 case DW_FORM_GNU_addr_index
:
20494 fprintf_unfiltered (f
, "address: ");
20495 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
20497 case DW_FORM_block2
:
20498 case DW_FORM_block4
:
20499 case DW_FORM_block
:
20500 case DW_FORM_block1
:
20501 fprintf_unfiltered (f
, "block: size %s",
20502 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
20504 case DW_FORM_exprloc
:
20505 fprintf_unfiltered (f
, "expression: size %s",
20506 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
20508 case DW_FORM_data16
:
20509 fprintf_unfiltered (f
, "constant of 16 bytes");
20511 case DW_FORM_ref_addr
:
20512 fprintf_unfiltered (f
, "ref address: ");
20513 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
20515 case DW_FORM_GNU_ref_alt
:
20516 fprintf_unfiltered (f
, "alt ref address: ");
20517 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
20523 case DW_FORM_ref_udata
:
20524 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
20525 (long) (DW_UNSND (&die
->attrs
[i
])));
20527 case DW_FORM_data1
:
20528 case DW_FORM_data2
:
20529 case DW_FORM_data4
:
20530 case DW_FORM_data8
:
20531 case DW_FORM_udata
:
20532 case DW_FORM_sdata
:
20533 fprintf_unfiltered (f
, "constant: %s",
20534 pulongest (DW_UNSND (&die
->attrs
[i
])));
20536 case DW_FORM_sec_offset
:
20537 fprintf_unfiltered (f
, "section offset: %s",
20538 pulongest (DW_UNSND (&die
->attrs
[i
])));
20540 case DW_FORM_ref_sig8
:
20541 fprintf_unfiltered (f
, "signature: %s",
20542 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
20544 case DW_FORM_string
:
20546 case DW_FORM_line_strp
:
20547 case DW_FORM_GNU_str_index
:
20548 case DW_FORM_GNU_strp_alt
:
20549 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
20550 DW_STRING (&die
->attrs
[i
])
20551 ? DW_STRING (&die
->attrs
[i
]) : "",
20552 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
20555 if (DW_UNSND (&die
->attrs
[i
]))
20556 fprintf_unfiltered (f
, "flag: TRUE");
20558 fprintf_unfiltered (f
, "flag: FALSE");
20560 case DW_FORM_flag_present
:
20561 fprintf_unfiltered (f
, "flag: TRUE");
20563 case DW_FORM_indirect
:
20564 /* The reader will have reduced the indirect form to
20565 the "base form" so this form should not occur. */
20566 fprintf_unfiltered (f
,
20567 "unexpected attribute form: DW_FORM_indirect");
20569 case DW_FORM_implicit_const
:
20570 fprintf_unfiltered (f
, "constant: %s",
20571 plongest (DW_SND (&die
->attrs
[i
])));
20574 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
20575 die
->attrs
[i
].form
);
20578 fprintf_unfiltered (f
, "\n");
20583 dump_die_for_error (struct die_info
*die
)
20585 dump_die_shallow (gdb_stderr
, 0, die
);
20589 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
20591 int indent
= level
* 4;
20593 gdb_assert (die
!= NULL
);
20595 if (level
>= max_level
)
20598 dump_die_shallow (f
, indent
, die
);
20600 if (die
->child
!= NULL
)
20602 print_spaces (indent
, f
);
20603 fprintf_unfiltered (f
, " Children:");
20604 if (level
+ 1 < max_level
)
20606 fprintf_unfiltered (f
, "\n");
20607 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
20611 fprintf_unfiltered (f
,
20612 " [not printed, max nesting level reached]\n");
20616 if (die
->sibling
!= NULL
&& level
> 0)
20618 dump_die_1 (f
, level
, max_level
, die
->sibling
);
20622 /* This is called from the pdie macro in gdbinit.in.
20623 It's not static so gcc will keep a copy callable from gdb. */
20626 dump_die (struct die_info
*die
, int max_level
)
20628 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
20632 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
20636 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
20637 to_underlying (die
->sect_off
),
20643 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
20647 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
20649 if (attr_form_is_ref (attr
))
20650 return (sect_offset
) DW_UNSND (attr
);
20652 complaint (&symfile_complaints
,
20653 _("unsupported die ref attribute form: '%s'"),
20654 dwarf_form_name (attr
->form
));
20658 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
20659 * the value held by the attribute is not constant. */
20662 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
20664 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
20665 return DW_SND (attr
);
20666 else if (attr
->form
== DW_FORM_udata
20667 || attr
->form
== DW_FORM_data1
20668 || attr
->form
== DW_FORM_data2
20669 || attr
->form
== DW_FORM_data4
20670 || attr
->form
== DW_FORM_data8
)
20671 return DW_UNSND (attr
);
20674 /* For DW_FORM_data16 see attr_form_is_constant. */
20675 complaint (&symfile_complaints
,
20676 _("Attribute value is not a constant (%s)"),
20677 dwarf_form_name (attr
->form
));
20678 return default_value
;
20682 /* Follow reference or signature attribute ATTR of SRC_DIE.
20683 On entry *REF_CU is the CU of SRC_DIE.
20684 On exit *REF_CU is the CU of the result. */
20686 static struct die_info
*
20687 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
20688 struct dwarf2_cu
**ref_cu
)
20690 struct die_info
*die
;
20692 if (attr_form_is_ref (attr
))
20693 die
= follow_die_ref (src_die
, attr
, ref_cu
);
20694 else if (attr
->form
== DW_FORM_ref_sig8
)
20695 die
= follow_die_sig (src_die
, attr
, ref_cu
);
20698 dump_die_for_error (src_die
);
20699 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
20700 objfile_name ((*ref_cu
)->objfile
));
20706 /* Follow reference OFFSET.
20707 On entry *REF_CU is the CU of the source die referencing OFFSET.
20708 On exit *REF_CU is the CU of the result.
20709 Returns NULL if OFFSET is invalid. */
20711 static struct die_info
*
20712 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
20713 struct dwarf2_cu
**ref_cu
)
20715 struct die_info temp_die
;
20716 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
20718 gdb_assert (cu
->per_cu
!= NULL
);
20722 if (cu
->per_cu
->is_debug_types
)
20724 /* .debug_types CUs cannot reference anything outside their CU.
20725 If they need to, they have to reference a signatured type via
20726 DW_FORM_ref_sig8. */
20727 if (!offset_in_cu_p (&cu
->header
, sect_off
))
20730 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
20731 || !offset_in_cu_p (&cu
->header
, sect_off
))
20733 struct dwarf2_per_cu_data
*per_cu
;
20735 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
20738 /* If necessary, add it to the queue and load its DIEs. */
20739 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
20740 load_full_comp_unit (per_cu
, cu
->language
);
20742 target_cu
= per_cu
->cu
;
20744 else if (cu
->dies
== NULL
)
20746 /* We're loading full DIEs during partial symbol reading. */
20747 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
20748 load_full_comp_unit (cu
->per_cu
, language_minimal
);
20751 *ref_cu
= target_cu
;
20752 temp_die
.sect_off
= sect_off
;
20753 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
20755 to_underlying (sect_off
));
20758 /* Follow reference attribute ATTR of SRC_DIE.
20759 On entry *REF_CU is the CU of SRC_DIE.
20760 On exit *REF_CU is the CU of the result. */
20762 static struct die_info
*
20763 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
20764 struct dwarf2_cu
**ref_cu
)
20766 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
20767 struct dwarf2_cu
*cu
= *ref_cu
;
20768 struct die_info
*die
;
20770 die
= follow_die_offset (sect_off
,
20771 (attr
->form
== DW_FORM_GNU_ref_alt
20772 || cu
->per_cu
->is_dwz
),
20775 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
20776 "at 0x%x [in module %s]"),
20777 to_underlying (sect_off
), to_underlying (src_die
->sect_off
),
20778 objfile_name (cu
->objfile
));
20783 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
20784 Returned value is intended for DW_OP_call*. Returned
20785 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
20787 struct dwarf2_locexpr_baton
20788 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
20789 struct dwarf2_per_cu_data
*per_cu
,
20790 CORE_ADDR (*get_frame_pc
) (void *baton
),
20793 struct dwarf2_cu
*cu
;
20794 struct die_info
*die
;
20795 struct attribute
*attr
;
20796 struct dwarf2_locexpr_baton retval
;
20798 dw2_setup (per_cu
->objfile
);
20800 if (per_cu
->cu
== NULL
)
20805 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20806 Instead just throw an error, not much else we can do. */
20807 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20808 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20811 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
20813 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20814 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20816 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20819 /* DWARF: "If there is no such attribute, then there is no effect.".
20820 DATA is ignored if SIZE is 0. */
20822 retval
.data
= NULL
;
20825 else if (attr_form_is_section_offset (attr
))
20827 struct dwarf2_loclist_baton loclist_baton
;
20828 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
20831 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
20833 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
20835 retval
.size
= size
;
20839 if (!attr_form_is_block (attr
))
20840 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
20841 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
20842 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20844 retval
.data
= DW_BLOCK (attr
)->data
;
20845 retval
.size
= DW_BLOCK (attr
)->size
;
20847 retval
.per_cu
= cu
->per_cu
;
20849 age_cached_comp_units ();
20854 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
20857 struct dwarf2_locexpr_baton
20858 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
20859 struct dwarf2_per_cu_data
*per_cu
,
20860 CORE_ADDR (*get_frame_pc
) (void *baton
),
20863 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
20865 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
20868 /* Write a constant of a given type as target-ordered bytes into
20871 static const gdb_byte
*
20872 write_constant_as_bytes (struct obstack
*obstack
,
20873 enum bfd_endian byte_order
,
20880 *len
= TYPE_LENGTH (type
);
20881 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20882 store_unsigned_integer (result
, *len
, byte_order
, value
);
20887 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
20888 pointer to the constant bytes and set LEN to the length of the
20889 data. If memory is needed, allocate it on OBSTACK. If the DIE
20890 does not have a DW_AT_const_value, return NULL. */
20893 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
20894 struct dwarf2_per_cu_data
*per_cu
,
20895 struct obstack
*obstack
,
20898 struct dwarf2_cu
*cu
;
20899 struct die_info
*die
;
20900 struct attribute
*attr
;
20901 const gdb_byte
*result
= NULL
;
20904 enum bfd_endian byte_order
;
20906 dw2_setup (per_cu
->objfile
);
20908 if (per_cu
->cu
== NULL
)
20913 /* We shouldn't get here for a dummy CU, but don't crash on the user.
20914 Instead just throw an error, not much else we can do. */
20915 error (_("Dwarf Error: Dummy CU at 0x%x referenced in module %s"),
20916 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20919 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
20921 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
20922 to_underlying (sect_off
), objfile_name (per_cu
->objfile
));
20925 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20929 byte_order
= (bfd_big_endian (per_cu
->objfile
->obfd
)
20930 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
20932 switch (attr
->form
)
20935 case DW_FORM_GNU_addr_index
:
20939 *len
= cu
->header
.addr_size
;
20940 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
20941 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
20945 case DW_FORM_string
:
20947 case DW_FORM_GNU_str_index
:
20948 case DW_FORM_GNU_strp_alt
:
20949 /* DW_STRING is already allocated on the objfile obstack, point
20951 result
= (const gdb_byte
*) DW_STRING (attr
);
20952 *len
= strlen (DW_STRING (attr
));
20954 case DW_FORM_block1
:
20955 case DW_FORM_block2
:
20956 case DW_FORM_block4
:
20957 case DW_FORM_block
:
20958 case DW_FORM_exprloc
:
20959 case DW_FORM_data16
:
20960 result
= DW_BLOCK (attr
)->data
;
20961 *len
= DW_BLOCK (attr
)->size
;
20964 /* The DW_AT_const_value attributes are supposed to carry the
20965 symbol's value "represented as it would be on the target
20966 architecture." By the time we get here, it's already been
20967 converted to host endianness, so we just need to sign- or
20968 zero-extend it as appropriate. */
20969 case DW_FORM_data1
:
20970 type
= die_type (die
, cu
);
20971 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
20972 if (result
== NULL
)
20973 result
= write_constant_as_bytes (obstack
, byte_order
,
20976 case DW_FORM_data2
:
20977 type
= die_type (die
, cu
);
20978 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
20979 if (result
== NULL
)
20980 result
= write_constant_as_bytes (obstack
, byte_order
,
20983 case DW_FORM_data4
:
20984 type
= die_type (die
, cu
);
20985 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
20986 if (result
== NULL
)
20987 result
= write_constant_as_bytes (obstack
, byte_order
,
20990 case DW_FORM_data8
:
20991 type
= die_type (die
, cu
);
20992 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
20993 if (result
== NULL
)
20994 result
= write_constant_as_bytes (obstack
, byte_order
,
20998 case DW_FORM_sdata
:
20999 case DW_FORM_implicit_const
:
21000 type
= die_type (die
, cu
);
21001 result
= write_constant_as_bytes (obstack
, byte_order
,
21002 type
, DW_SND (attr
), len
);
21005 case DW_FORM_udata
:
21006 type
= die_type (die
, cu
);
21007 result
= write_constant_as_bytes (obstack
, byte_order
,
21008 type
, DW_UNSND (attr
), len
);
21012 complaint (&symfile_complaints
,
21013 _("unsupported const value attribute form: '%s'"),
21014 dwarf_form_name (attr
->form
));
21021 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
21022 valid type for this die is found. */
21025 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
21026 struct dwarf2_per_cu_data
*per_cu
)
21028 struct dwarf2_cu
*cu
;
21029 struct die_info
*die
;
21031 dw2_setup (per_cu
->objfile
);
21033 if (per_cu
->cu
== NULL
)
21039 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
21043 return die_type (die
, cu
);
21046 /* Return the type of the DIE at DIE_OFFSET in the CU named by
21050 dwarf2_get_die_type (cu_offset die_offset
,
21051 struct dwarf2_per_cu_data
*per_cu
)
21053 dw2_setup (per_cu
->objfile
);
21055 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
21056 return get_die_type_at_offset (die_offset_sect
, per_cu
);
21059 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
21060 On entry *REF_CU is the CU of SRC_DIE.
21061 On exit *REF_CU is the CU of the result.
21062 Returns NULL if the referenced DIE isn't found. */
21064 static struct die_info
*
21065 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
21066 struct dwarf2_cu
**ref_cu
)
21068 struct die_info temp_die
;
21069 struct dwarf2_cu
*sig_cu
;
21070 struct die_info
*die
;
21072 /* While it might be nice to assert sig_type->type == NULL here,
21073 we can get here for DW_AT_imported_declaration where we need
21074 the DIE not the type. */
21076 /* If necessary, add it to the queue and load its DIEs. */
21078 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
21079 read_signatured_type (sig_type
);
21081 sig_cu
= sig_type
->per_cu
.cu
;
21082 gdb_assert (sig_cu
!= NULL
);
21083 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
21084 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
21085 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
21086 to_underlying (temp_die
.sect_off
));
21089 /* For .gdb_index version 7 keep track of included TUs.
21090 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
21091 if (dwarf2_per_objfile
->index_table
!= NULL
21092 && dwarf2_per_objfile
->index_table
->version
<= 7)
21094 VEC_safe_push (dwarf2_per_cu_ptr
,
21095 (*ref_cu
)->per_cu
->imported_symtabs
,
21106 /* Follow signatured type referenced by ATTR in SRC_DIE.
21107 On entry *REF_CU is the CU of SRC_DIE.
21108 On exit *REF_CU is the CU of the result.
21109 The result is the DIE of the type.
21110 If the referenced type cannot be found an error is thrown. */
21112 static struct die_info
*
21113 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
21114 struct dwarf2_cu
**ref_cu
)
21116 ULONGEST signature
= DW_SIGNATURE (attr
);
21117 struct signatured_type
*sig_type
;
21118 struct die_info
*die
;
21120 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
21122 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
21123 /* sig_type will be NULL if the signatured type is missing from
21125 if (sig_type
== NULL
)
21127 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
21128 " from DIE at 0x%x [in module %s]"),
21129 hex_string (signature
), to_underlying (src_die
->sect_off
),
21130 objfile_name ((*ref_cu
)->objfile
));
21133 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
21136 dump_die_for_error (src_die
);
21137 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
21138 " from DIE at 0x%x [in module %s]"),
21139 hex_string (signature
), to_underlying (src_die
->sect_off
),
21140 objfile_name ((*ref_cu
)->objfile
));
21146 /* Get the type specified by SIGNATURE referenced in DIE/CU,
21147 reading in and processing the type unit if necessary. */
21149 static struct type
*
21150 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
21151 struct dwarf2_cu
*cu
)
21153 struct signatured_type
*sig_type
;
21154 struct dwarf2_cu
*type_cu
;
21155 struct die_info
*type_die
;
21158 sig_type
= lookup_signatured_type (cu
, signature
);
21159 /* sig_type will be NULL if the signatured type is missing from
21161 if (sig_type
== NULL
)
21163 complaint (&symfile_complaints
,
21164 _("Dwarf Error: Cannot find signatured DIE %s referenced"
21165 " from DIE at 0x%x [in module %s]"),
21166 hex_string (signature
), to_underlying (die
->sect_off
),
21167 objfile_name (dwarf2_per_objfile
->objfile
));
21168 return build_error_marker_type (cu
, die
);
21171 /* If we already know the type we're done. */
21172 if (sig_type
->type
!= NULL
)
21173 return sig_type
->type
;
21176 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
21177 if (type_die
!= NULL
)
21179 /* N.B. We need to call get_die_type to ensure only one type for this DIE
21180 is created. This is important, for example, because for c++ classes
21181 we need TYPE_NAME set which is only done by new_symbol. Blech. */
21182 type
= read_type_die (type_die
, type_cu
);
21185 complaint (&symfile_complaints
,
21186 _("Dwarf Error: Cannot build signatured type %s"
21187 " referenced from DIE at 0x%x [in module %s]"),
21188 hex_string (signature
), to_underlying (die
->sect_off
),
21189 objfile_name (dwarf2_per_objfile
->objfile
));
21190 type
= build_error_marker_type (cu
, die
);
21195 complaint (&symfile_complaints
,
21196 _("Dwarf Error: Problem reading signatured DIE %s referenced"
21197 " from DIE at 0x%x [in module %s]"),
21198 hex_string (signature
), to_underlying (die
->sect_off
),
21199 objfile_name (dwarf2_per_objfile
->objfile
));
21200 type
= build_error_marker_type (cu
, die
);
21202 sig_type
->type
= type
;
21207 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
21208 reading in and processing the type unit if necessary. */
21210 static struct type
*
21211 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
21212 struct dwarf2_cu
*cu
) /* ARI: editCase function */
21214 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
21215 if (attr_form_is_ref (attr
))
21217 struct dwarf2_cu
*type_cu
= cu
;
21218 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
21220 return read_type_die (type_die
, type_cu
);
21222 else if (attr
->form
== DW_FORM_ref_sig8
)
21224 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
21228 complaint (&symfile_complaints
,
21229 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
21230 " at 0x%x [in module %s]"),
21231 dwarf_form_name (attr
->form
), to_underlying (die
->sect_off
),
21232 objfile_name (dwarf2_per_objfile
->objfile
));
21233 return build_error_marker_type (cu
, die
);
21237 /* Load the DIEs associated with type unit PER_CU into memory. */
21240 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
21242 struct signatured_type
*sig_type
;
21244 /* Caller is responsible for ensuring type_unit_groups don't get here. */
21245 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
21247 /* We have the per_cu, but we need the signatured_type.
21248 Fortunately this is an easy translation. */
21249 gdb_assert (per_cu
->is_debug_types
);
21250 sig_type
= (struct signatured_type
*) per_cu
;
21252 gdb_assert (per_cu
->cu
== NULL
);
21254 read_signatured_type (sig_type
);
21256 gdb_assert (per_cu
->cu
!= NULL
);
21259 /* die_reader_func for read_signatured_type.
21260 This is identical to load_full_comp_unit_reader,
21261 but is kept separate for now. */
21264 read_signatured_type_reader (const struct die_reader_specs
*reader
,
21265 const gdb_byte
*info_ptr
,
21266 struct die_info
*comp_unit_die
,
21270 struct dwarf2_cu
*cu
= reader
->cu
;
21272 gdb_assert (cu
->die_hash
== NULL
);
21274 htab_create_alloc_ex (cu
->header
.length
/ 12,
21278 &cu
->comp_unit_obstack
,
21279 hashtab_obstack_allocate
,
21280 dummy_obstack_deallocate
);
21283 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
21284 &info_ptr
, comp_unit_die
);
21285 cu
->dies
= comp_unit_die
;
21286 /* comp_unit_die is not stored in die_hash, no need. */
21288 /* We try not to read any attributes in this function, because not
21289 all CUs needed for references have been loaded yet, and symbol
21290 table processing isn't initialized. But we have to set the CU language,
21291 or we won't be able to build types correctly.
21292 Similarly, if we do not read the producer, we can not apply
21293 producer-specific interpretation. */
21294 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
21297 /* Read in a signatured type and build its CU and DIEs.
21298 If the type is a stub for the real type in a DWO file,
21299 read in the real type from the DWO file as well. */
21302 read_signatured_type (struct signatured_type
*sig_type
)
21304 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
21306 gdb_assert (per_cu
->is_debug_types
);
21307 gdb_assert (per_cu
->cu
== NULL
);
21309 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
21310 read_signatured_type_reader
, NULL
);
21311 sig_type
->per_cu
.tu_read
= 1;
21314 /* Decode simple location descriptions.
21315 Given a pointer to a dwarf block that defines a location, compute
21316 the location and return the value.
21318 NOTE drow/2003-11-18: This function is called in two situations
21319 now: for the address of static or global variables (partial symbols
21320 only) and for offsets into structures which are expected to be
21321 (more or less) constant. The partial symbol case should go away,
21322 and only the constant case should remain. That will let this
21323 function complain more accurately. A few special modes are allowed
21324 without complaint for global variables (for instance, global
21325 register values and thread-local values).
21327 A location description containing no operations indicates that the
21328 object is optimized out. The return value is 0 for that case.
21329 FIXME drow/2003-11-16: No callers check for this case any more; soon all
21330 callers will only want a very basic result and this can become a
21333 Note that stack[0] is unused except as a default error return. */
21336 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
21338 struct objfile
*objfile
= cu
->objfile
;
21340 size_t size
= blk
->size
;
21341 const gdb_byte
*data
= blk
->data
;
21342 CORE_ADDR stack
[64];
21344 unsigned int bytes_read
, unsnd
;
21350 stack
[++stacki
] = 0;
21389 stack
[++stacki
] = op
- DW_OP_lit0
;
21424 stack
[++stacki
] = op
- DW_OP_reg0
;
21426 dwarf2_complex_location_expr_complaint ();
21430 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
21432 stack
[++stacki
] = unsnd
;
21434 dwarf2_complex_location_expr_complaint ();
21438 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
21443 case DW_OP_const1u
:
21444 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
21448 case DW_OP_const1s
:
21449 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
21453 case DW_OP_const2u
:
21454 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
21458 case DW_OP_const2s
:
21459 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
21463 case DW_OP_const4u
:
21464 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
21468 case DW_OP_const4s
:
21469 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
21473 case DW_OP_const8u
:
21474 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
21479 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
21485 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
21490 stack
[stacki
+ 1] = stack
[stacki
];
21495 stack
[stacki
- 1] += stack
[stacki
];
21499 case DW_OP_plus_uconst
:
21500 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
21506 stack
[stacki
- 1] -= stack
[stacki
];
21511 /* If we're not the last op, then we definitely can't encode
21512 this using GDB's address_class enum. This is valid for partial
21513 global symbols, although the variable's address will be bogus
21516 dwarf2_complex_location_expr_complaint ();
21519 case DW_OP_GNU_push_tls_address
:
21520 case DW_OP_form_tls_address
:
21521 /* The top of the stack has the offset from the beginning
21522 of the thread control block at which the variable is located. */
21523 /* Nothing should follow this operator, so the top of stack would
21525 /* This is valid for partial global symbols, but the variable's
21526 address will be bogus in the psymtab. Make it always at least
21527 non-zero to not look as a variable garbage collected by linker
21528 which have DW_OP_addr 0. */
21530 dwarf2_complex_location_expr_complaint ();
21534 case DW_OP_GNU_uninit
:
21537 case DW_OP_GNU_addr_index
:
21538 case DW_OP_GNU_const_index
:
21539 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
21546 const char *name
= get_DW_OP_name (op
);
21549 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
21552 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
21556 return (stack
[stacki
]);
21559 /* Enforce maximum stack depth of SIZE-1 to avoid writing
21560 outside of the allocated space. Also enforce minimum>0. */
21561 if (stacki
>= ARRAY_SIZE (stack
) - 1)
21563 complaint (&symfile_complaints
,
21564 _("location description stack overflow"));
21570 complaint (&symfile_complaints
,
21571 _("location description stack underflow"));
21575 return (stack
[stacki
]);
21578 /* memory allocation interface */
21580 static struct dwarf_block
*
21581 dwarf_alloc_block (struct dwarf2_cu
*cu
)
21583 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
21586 static struct die_info
*
21587 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
21589 struct die_info
*die
;
21590 size_t size
= sizeof (struct die_info
);
21593 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
21595 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
21596 memset (die
, 0, sizeof (struct die_info
));
21601 /* Macro support. */
21603 /* Return file name relative to the compilation directory of file number I in
21604 *LH's file name table. The result is allocated using xmalloc; the caller is
21605 responsible for freeing it. */
21608 file_file_name (int file
, struct line_header
*lh
)
21610 /* Is the file number a valid index into the line header's file name
21611 table? Remember that file numbers start with one, not zero. */
21612 if (1 <= file
&& file
<= lh
->file_names
.size ())
21614 const file_entry
&fe
= lh
->file_names
[file
- 1];
21616 if (!IS_ABSOLUTE_PATH (fe
.name
))
21618 const char *dir
= fe
.include_dir (lh
);
21620 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
21622 return xstrdup (fe
.name
);
21626 /* The compiler produced a bogus file number. We can at least
21627 record the macro definitions made in the file, even if we
21628 won't be able to find the file by name. */
21629 char fake_name
[80];
21631 xsnprintf (fake_name
, sizeof (fake_name
),
21632 "<bad macro file number %d>", file
);
21634 complaint (&symfile_complaints
,
21635 _("bad file number in macro information (%d)"),
21638 return xstrdup (fake_name
);
21642 /* Return the full name of file number I in *LH's file name table.
21643 Use COMP_DIR as the name of the current directory of the
21644 compilation. The result is allocated using xmalloc; the caller is
21645 responsible for freeing it. */
21647 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
21649 /* Is the file number a valid index into the line header's file name
21650 table? Remember that file numbers start with one, not zero. */
21651 if (1 <= file
&& file
<= lh
->file_names
.size ())
21653 char *relative
= file_file_name (file
, lh
);
21655 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
21657 return reconcat (relative
, comp_dir
, SLASH_STRING
,
21658 relative
, (char *) NULL
);
21661 return file_file_name (file
, lh
);
21665 static struct macro_source_file
*
21666 macro_start_file (int file
, int line
,
21667 struct macro_source_file
*current_file
,
21668 struct line_header
*lh
)
21670 /* File name relative to the compilation directory of this source file. */
21671 char *file_name
= file_file_name (file
, lh
);
21673 if (! current_file
)
21675 /* Note: We don't create a macro table for this compilation unit
21676 at all until we actually get a filename. */
21677 struct macro_table
*macro_table
= get_macro_table ();
21679 /* If we have no current file, then this must be the start_file
21680 directive for the compilation unit's main source file. */
21681 current_file
= macro_set_main (macro_table
, file_name
);
21682 macro_define_special (macro_table
);
21685 current_file
= macro_include (current_file
, line
, file_name
);
21689 return current_file
;
21693 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
21694 followed by a null byte. */
21696 copy_string (const char *buf
, int len
)
21698 char *s
= (char *) xmalloc (len
+ 1);
21700 memcpy (s
, buf
, len
);
21706 static const char *
21707 consume_improper_spaces (const char *p
, const char *body
)
21711 complaint (&symfile_complaints
,
21712 _("macro definition contains spaces "
21713 "in formal argument list:\n`%s'"),
21725 parse_macro_definition (struct macro_source_file
*file
, int line
,
21730 /* The body string takes one of two forms. For object-like macro
21731 definitions, it should be:
21733 <macro name> " " <definition>
21735 For function-like macro definitions, it should be:
21737 <macro name> "() " <definition>
21739 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
21741 Spaces may appear only where explicitly indicated, and in the
21744 The Dwarf 2 spec says that an object-like macro's name is always
21745 followed by a space, but versions of GCC around March 2002 omit
21746 the space when the macro's definition is the empty string.
21748 The Dwarf 2 spec says that there should be no spaces between the
21749 formal arguments in a function-like macro's formal argument list,
21750 but versions of GCC around March 2002 include spaces after the
21754 /* Find the extent of the macro name. The macro name is terminated
21755 by either a space or null character (for an object-like macro) or
21756 an opening paren (for a function-like macro). */
21757 for (p
= body
; *p
; p
++)
21758 if (*p
== ' ' || *p
== '(')
21761 if (*p
== ' ' || *p
== '\0')
21763 /* It's an object-like macro. */
21764 int name_len
= p
- body
;
21765 char *name
= copy_string (body
, name_len
);
21766 const char *replacement
;
21769 replacement
= body
+ name_len
+ 1;
21772 dwarf2_macro_malformed_definition_complaint (body
);
21773 replacement
= body
+ name_len
;
21776 macro_define_object (file
, line
, name
, replacement
);
21780 else if (*p
== '(')
21782 /* It's a function-like macro. */
21783 char *name
= copy_string (body
, p
- body
);
21786 char **argv
= XNEWVEC (char *, argv_size
);
21790 p
= consume_improper_spaces (p
, body
);
21792 /* Parse the formal argument list. */
21793 while (*p
&& *p
!= ')')
21795 /* Find the extent of the current argument name. */
21796 const char *arg_start
= p
;
21798 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
21801 if (! *p
|| p
== arg_start
)
21802 dwarf2_macro_malformed_definition_complaint (body
);
21805 /* Make sure argv has room for the new argument. */
21806 if (argc
>= argv_size
)
21809 argv
= XRESIZEVEC (char *, argv
, argv_size
);
21812 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
21815 p
= consume_improper_spaces (p
, body
);
21817 /* Consume the comma, if present. */
21822 p
= consume_improper_spaces (p
, body
);
21831 /* Perfectly formed definition, no complaints. */
21832 macro_define_function (file
, line
, name
,
21833 argc
, (const char **) argv
,
21835 else if (*p
== '\0')
21837 /* Complain, but do define it. */
21838 dwarf2_macro_malformed_definition_complaint (body
);
21839 macro_define_function (file
, line
, name
,
21840 argc
, (const char **) argv
,
21844 /* Just complain. */
21845 dwarf2_macro_malformed_definition_complaint (body
);
21848 /* Just complain. */
21849 dwarf2_macro_malformed_definition_complaint (body
);
21855 for (i
= 0; i
< argc
; i
++)
21861 dwarf2_macro_malformed_definition_complaint (body
);
21864 /* Skip some bytes from BYTES according to the form given in FORM.
21865 Returns the new pointer. */
21867 static const gdb_byte
*
21868 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
21869 enum dwarf_form form
,
21870 unsigned int offset_size
,
21871 struct dwarf2_section_info
*section
)
21873 unsigned int bytes_read
;
21877 case DW_FORM_data1
:
21882 case DW_FORM_data2
:
21886 case DW_FORM_data4
:
21890 case DW_FORM_data8
:
21894 case DW_FORM_data16
:
21898 case DW_FORM_string
:
21899 read_direct_string (abfd
, bytes
, &bytes_read
);
21900 bytes
+= bytes_read
;
21903 case DW_FORM_sec_offset
:
21905 case DW_FORM_GNU_strp_alt
:
21906 bytes
+= offset_size
;
21909 case DW_FORM_block
:
21910 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
21911 bytes
+= bytes_read
;
21914 case DW_FORM_block1
:
21915 bytes
+= 1 + read_1_byte (abfd
, bytes
);
21917 case DW_FORM_block2
:
21918 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
21920 case DW_FORM_block4
:
21921 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
21924 case DW_FORM_sdata
:
21925 case DW_FORM_udata
:
21926 case DW_FORM_GNU_addr_index
:
21927 case DW_FORM_GNU_str_index
:
21928 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
21931 dwarf2_section_buffer_overflow_complaint (section
);
21936 case DW_FORM_implicit_const
:
21942 complaint (&symfile_complaints
,
21943 _("invalid form 0x%x in `%s'"),
21944 form
, get_section_name (section
));
21952 /* A helper for dwarf_decode_macros that handles skipping an unknown
21953 opcode. Returns an updated pointer to the macro data buffer; or,
21954 on error, issues a complaint and returns NULL. */
21956 static const gdb_byte
*
21957 skip_unknown_opcode (unsigned int opcode
,
21958 const gdb_byte
**opcode_definitions
,
21959 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
21961 unsigned int offset_size
,
21962 struct dwarf2_section_info
*section
)
21964 unsigned int bytes_read
, i
;
21966 const gdb_byte
*defn
;
21968 if (opcode_definitions
[opcode
] == NULL
)
21970 complaint (&symfile_complaints
,
21971 _("unrecognized DW_MACFINO opcode 0x%x"),
21976 defn
= opcode_definitions
[opcode
];
21977 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
21978 defn
+= bytes_read
;
21980 for (i
= 0; i
< arg
; ++i
)
21982 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
21983 (enum dwarf_form
) defn
[i
], offset_size
,
21985 if (mac_ptr
== NULL
)
21987 /* skip_form_bytes already issued the complaint. */
21995 /* A helper function which parses the header of a macro section.
21996 If the macro section is the extended (for now called "GNU") type,
21997 then this updates *OFFSET_SIZE. Returns a pointer to just after
21998 the header, or issues a complaint and returns NULL on error. */
22000 static const gdb_byte
*
22001 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
22003 const gdb_byte
*mac_ptr
,
22004 unsigned int *offset_size
,
22005 int section_is_gnu
)
22007 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
22009 if (section_is_gnu
)
22011 unsigned int version
, flags
;
22013 version
= read_2_bytes (abfd
, mac_ptr
);
22014 if (version
!= 4 && version
!= 5)
22016 complaint (&symfile_complaints
,
22017 _("unrecognized version `%d' in .debug_macro section"),
22023 flags
= read_1_byte (abfd
, mac_ptr
);
22025 *offset_size
= (flags
& 1) ? 8 : 4;
22027 if ((flags
& 2) != 0)
22028 /* We don't need the line table offset. */
22029 mac_ptr
+= *offset_size
;
22031 /* Vendor opcode descriptions. */
22032 if ((flags
& 4) != 0)
22034 unsigned int i
, count
;
22036 count
= read_1_byte (abfd
, mac_ptr
);
22038 for (i
= 0; i
< count
; ++i
)
22040 unsigned int opcode
, bytes_read
;
22043 opcode
= read_1_byte (abfd
, mac_ptr
);
22045 opcode_definitions
[opcode
] = mac_ptr
;
22046 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22047 mac_ptr
+= bytes_read
;
22056 /* A helper for dwarf_decode_macros that handles the GNU extensions,
22057 including DW_MACRO_import. */
22060 dwarf_decode_macro_bytes (bfd
*abfd
,
22061 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
22062 struct macro_source_file
*current_file
,
22063 struct line_header
*lh
,
22064 struct dwarf2_section_info
*section
,
22065 int section_is_gnu
, int section_is_dwz
,
22066 unsigned int offset_size
,
22067 htab_t include_hash
)
22069 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22070 enum dwarf_macro_record_type macinfo_type
;
22071 int at_commandline
;
22072 const gdb_byte
*opcode_definitions
[256];
22074 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22075 &offset_size
, section_is_gnu
);
22076 if (mac_ptr
== NULL
)
22078 /* We already issued a complaint. */
22082 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
22083 GDB is still reading the definitions from command line. First
22084 DW_MACINFO_start_file will need to be ignored as it was already executed
22085 to create CURRENT_FILE for the main source holding also the command line
22086 definitions. On first met DW_MACINFO_start_file this flag is reset to
22087 normally execute all the remaining DW_MACINFO_start_file macinfos. */
22089 at_commandline
= 1;
22093 /* Do we at least have room for a macinfo type byte? */
22094 if (mac_ptr
>= mac_end
)
22096 dwarf2_section_buffer_overflow_complaint (section
);
22100 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22103 /* Note that we rely on the fact that the corresponding GNU and
22104 DWARF constants are the same. */
22105 switch (macinfo_type
)
22107 /* A zero macinfo type indicates the end of the macro
22112 case DW_MACRO_define
:
22113 case DW_MACRO_undef
:
22114 case DW_MACRO_define_strp
:
22115 case DW_MACRO_undef_strp
:
22116 case DW_MACRO_define_sup
:
22117 case DW_MACRO_undef_sup
:
22119 unsigned int bytes_read
;
22124 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22125 mac_ptr
+= bytes_read
;
22127 if (macinfo_type
== DW_MACRO_define
22128 || macinfo_type
== DW_MACRO_undef
)
22130 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22131 mac_ptr
+= bytes_read
;
22135 LONGEST str_offset
;
22137 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
22138 mac_ptr
+= offset_size
;
22140 if (macinfo_type
== DW_MACRO_define_sup
22141 || macinfo_type
== DW_MACRO_undef_sup
22144 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
22146 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
22149 body
= read_indirect_string_at_offset (abfd
, str_offset
);
22152 is_define
= (macinfo_type
== DW_MACRO_define
22153 || macinfo_type
== DW_MACRO_define_strp
22154 || macinfo_type
== DW_MACRO_define_sup
);
22155 if (! current_file
)
22157 /* DWARF violation as no main source is present. */
22158 complaint (&symfile_complaints
,
22159 _("debug info with no main source gives macro %s "
22161 is_define
? _("definition") : _("undefinition"),
22165 if ((line
== 0 && !at_commandline
)
22166 || (line
!= 0 && at_commandline
))
22167 complaint (&symfile_complaints
,
22168 _("debug info gives %s macro %s with %s line %d: %s"),
22169 at_commandline
? _("command-line") : _("in-file"),
22170 is_define
? _("definition") : _("undefinition"),
22171 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
22174 parse_macro_definition (current_file
, line
, body
);
22177 gdb_assert (macinfo_type
== DW_MACRO_undef
22178 || macinfo_type
== DW_MACRO_undef_strp
22179 || macinfo_type
== DW_MACRO_undef_sup
);
22180 macro_undef (current_file
, line
, body
);
22185 case DW_MACRO_start_file
:
22187 unsigned int bytes_read
;
22190 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22191 mac_ptr
+= bytes_read
;
22192 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22193 mac_ptr
+= bytes_read
;
22195 if ((line
== 0 && !at_commandline
)
22196 || (line
!= 0 && at_commandline
))
22197 complaint (&symfile_complaints
,
22198 _("debug info gives source %d included "
22199 "from %s at %s line %d"),
22200 file
, at_commandline
? _("command-line") : _("file"),
22201 line
== 0 ? _("zero") : _("non-zero"), line
);
22203 if (at_commandline
)
22205 /* This DW_MACRO_start_file was executed in the
22207 at_commandline
= 0;
22210 current_file
= macro_start_file (file
, line
, current_file
, lh
);
22214 case DW_MACRO_end_file
:
22215 if (! current_file
)
22216 complaint (&symfile_complaints
,
22217 _("macro debug info has an unmatched "
22218 "`close_file' directive"));
22221 current_file
= current_file
->included_by
;
22222 if (! current_file
)
22224 enum dwarf_macro_record_type next_type
;
22226 /* GCC circa March 2002 doesn't produce the zero
22227 type byte marking the end of the compilation
22228 unit. Complain if it's not there, but exit no
22231 /* Do we at least have room for a macinfo type byte? */
22232 if (mac_ptr
>= mac_end
)
22234 dwarf2_section_buffer_overflow_complaint (section
);
22238 /* We don't increment mac_ptr here, so this is just
22241 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
22243 if (next_type
!= 0)
22244 complaint (&symfile_complaints
,
22245 _("no terminating 0-type entry for "
22246 "macros in `.debug_macinfo' section"));
22253 case DW_MACRO_import
:
22254 case DW_MACRO_import_sup
:
22258 bfd
*include_bfd
= abfd
;
22259 struct dwarf2_section_info
*include_section
= section
;
22260 const gdb_byte
*include_mac_end
= mac_end
;
22261 int is_dwz
= section_is_dwz
;
22262 const gdb_byte
*new_mac_ptr
;
22264 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
22265 mac_ptr
+= offset_size
;
22267 if (macinfo_type
== DW_MACRO_import_sup
)
22269 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
22271 dwarf2_read_section (objfile
, &dwz
->macro
);
22273 include_section
= &dwz
->macro
;
22274 include_bfd
= get_section_bfd_owner (include_section
);
22275 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
22279 new_mac_ptr
= include_section
->buffer
+ offset
;
22280 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
22284 /* This has actually happened; see
22285 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
22286 complaint (&symfile_complaints
,
22287 _("recursive DW_MACRO_import in "
22288 ".debug_macro section"));
22292 *slot
= (void *) new_mac_ptr
;
22294 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
22295 include_mac_end
, current_file
, lh
,
22296 section
, section_is_gnu
, is_dwz
,
22297 offset_size
, include_hash
);
22299 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
22304 case DW_MACINFO_vendor_ext
:
22305 if (!section_is_gnu
)
22307 unsigned int bytes_read
;
22309 /* This reads the constant, but since we don't recognize
22310 any vendor extensions, we ignore it. */
22311 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22312 mac_ptr
+= bytes_read
;
22313 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22314 mac_ptr
+= bytes_read
;
22316 /* We don't recognize any vendor extensions. */
22322 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
22323 mac_ptr
, mac_end
, abfd
, offset_size
,
22325 if (mac_ptr
== NULL
)
22329 } while (macinfo_type
!= 0);
22333 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
22334 int section_is_gnu
)
22336 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22337 struct line_header
*lh
= cu
->line_header
;
22339 const gdb_byte
*mac_ptr
, *mac_end
;
22340 struct macro_source_file
*current_file
= 0;
22341 enum dwarf_macro_record_type macinfo_type
;
22342 unsigned int offset_size
= cu
->header
.offset_size
;
22343 const gdb_byte
*opcode_definitions
[256];
22344 struct cleanup
*cleanup
;
22346 struct dwarf2_section_info
*section
;
22347 const char *section_name
;
22349 if (cu
->dwo_unit
!= NULL
)
22351 if (section_is_gnu
)
22353 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
22354 section_name
= ".debug_macro.dwo";
22358 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
22359 section_name
= ".debug_macinfo.dwo";
22364 if (section_is_gnu
)
22366 section
= &dwarf2_per_objfile
->macro
;
22367 section_name
= ".debug_macro";
22371 section
= &dwarf2_per_objfile
->macinfo
;
22372 section_name
= ".debug_macinfo";
22376 dwarf2_read_section (objfile
, section
);
22377 if (section
->buffer
== NULL
)
22379 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
22382 abfd
= get_section_bfd_owner (section
);
22384 /* First pass: Find the name of the base filename.
22385 This filename is needed in order to process all macros whose definition
22386 (or undefinition) comes from the command line. These macros are defined
22387 before the first DW_MACINFO_start_file entry, and yet still need to be
22388 associated to the base file.
22390 To determine the base file name, we scan the macro definitions until we
22391 reach the first DW_MACINFO_start_file entry. We then initialize
22392 CURRENT_FILE accordingly so that any macro definition found before the
22393 first DW_MACINFO_start_file can still be associated to the base file. */
22395 mac_ptr
= section
->buffer
+ offset
;
22396 mac_end
= section
->buffer
+ section
->size
;
22398 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
22399 &offset_size
, section_is_gnu
);
22400 if (mac_ptr
== NULL
)
22402 /* We already issued a complaint. */
22408 /* Do we at least have room for a macinfo type byte? */
22409 if (mac_ptr
>= mac_end
)
22411 /* Complaint is printed during the second pass as GDB will probably
22412 stop the first pass earlier upon finding
22413 DW_MACINFO_start_file. */
22417 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
22420 /* Note that we rely on the fact that the corresponding GNU and
22421 DWARF constants are the same. */
22422 switch (macinfo_type
)
22424 /* A zero macinfo type indicates the end of the macro
22429 case DW_MACRO_define
:
22430 case DW_MACRO_undef
:
22431 /* Only skip the data by MAC_PTR. */
22433 unsigned int bytes_read
;
22435 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22436 mac_ptr
+= bytes_read
;
22437 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22438 mac_ptr
+= bytes_read
;
22442 case DW_MACRO_start_file
:
22444 unsigned int bytes_read
;
22447 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22448 mac_ptr
+= bytes_read
;
22449 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22450 mac_ptr
+= bytes_read
;
22452 current_file
= macro_start_file (file
, line
, current_file
, lh
);
22456 case DW_MACRO_end_file
:
22457 /* No data to skip by MAC_PTR. */
22460 case DW_MACRO_define_strp
:
22461 case DW_MACRO_undef_strp
:
22462 case DW_MACRO_define_sup
:
22463 case DW_MACRO_undef_sup
:
22465 unsigned int bytes_read
;
22467 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22468 mac_ptr
+= bytes_read
;
22469 mac_ptr
+= offset_size
;
22473 case DW_MACRO_import
:
22474 case DW_MACRO_import_sup
:
22475 /* Note that, according to the spec, a transparent include
22476 chain cannot call DW_MACRO_start_file. So, we can just
22477 skip this opcode. */
22478 mac_ptr
+= offset_size
;
22481 case DW_MACINFO_vendor_ext
:
22482 /* Only skip the data by MAC_PTR. */
22483 if (!section_is_gnu
)
22485 unsigned int bytes_read
;
22487 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
22488 mac_ptr
+= bytes_read
;
22489 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
22490 mac_ptr
+= bytes_read
;
22495 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
22496 mac_ptr
, mac_end
, abfd
, offset_size
,
22498 if (mac_ptr
== NULL
)
22502 } while (macinfo_type
!= 0 && current_file
== NULL
);
22504 /* Second pass: Process all entries.
22506 Use the AT_COMMAND_LINE flag to determine whether we are still processing
22507 command-line macro definitions/undefinitions. This flag is unset when we
22508 reach the first DW_MACINFO_start_file entry. */
22510 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
22512 NULL
, xcalloc
, xfree
));
22513 mac_ptr
= section
->buffer
+ offset
;
22514 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
22515 *slot
= (void *) mac_ptr
;
22516 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
22517 current_file
, lh
, section
,
22518 section_is_gnu
, 0, offset_size
,
22519 include_hash
.get ());
22522 /* Check if the attribute's form is a DW_FORM_block*
22523 if so return true else false. */
22526 attr_form_is_block (const struct attribute
*attr
)
22528 return (attr
== NULL
? 0 :
22529 attr
->form
== DW_FORM_block1
22530 || attr
->form
== DW_FORM_block2
22531 || attr
->form
== DW_FORM_block4
22532 || attr
->form
== DW_FORM_block
22533 || attr
->form
== DW_FORM_exprloc
);
22536 /* Return non-zero if ATTR's value is a section offset --- classes
22537 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
22538 You may use DW_UNSND (attr) to retrieve such offsets.
22540 Section 7.5.4, "Attribute Encodings", explains that no attribute
22541 may have a value that belongs to more than one of these classes; it
22542 would be ambiguous if we did, because we use the same forms for all
22546 attr_form_is_section_offset (const struct attribute
*attr
)
22548 return (attr
->form
== DW_FORM_data4
22549 || attr
->form
== DW_FORM_data8
22550 || attr
->form
== DW_FORM_sec_offset
);
22553 /* Return non-zero if ATTR's value falls in the 'constant' class, or
22554 zero otherwise. When this function returns true, you can apply
22555 dwarf2_get_attr_constant_value to it.
22557 However, note that for some attributes you must check
22558 attr_form_is_section_offset before using this test. DW_FORM_data4
22559 and DW_FORM_data8 are members of both the constant class, and of
22560 the classes that contain offsets into other debug sections
22561 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
22562 that, if an attribute's can be either a constant or one of the
22563 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
22564 taken as section offsets, not constants.
22566 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
22567 cannot handle that. */
22570 attr_form_is_constant (const struct attribute
*attr
)
22572 switch (attr
->form
)
22574 case DW_FORM_sdata
:
22575 case DW_FORM_udata
:
22576 case DW_FORM_data1
:
22577 case DW_FORM_data2
:
22578 case DW_FORM_data4
:
22579 case DW_FORM_data8
:
22580 case DW_FORM_implicit_const
:
22588 /* DW_ADDR is always stored already as sect_offset; despite for the forms
22589 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
22592 attr_form_is_ref (const struct attribute
*attr
)
22594 switch (attr
->form
)
22596 case DW_FORM_ref_addr
:
22601 case DW_FORM_ref_udata
:
22602 case DW_FORM_GNU_ref_alt
:
22609 /* Return the .debug_loc section to use for CU.
22610 For DWO files use .debug_loc.dwo. */
22612 static struct dwarf2_section_info
*
22613 cu_debug_loc_section (struct dwarf2_cu
*cu
)
22617 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
22619 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
22621 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
22622 : &dwarf2_per_objfile
->loc
);
22625 /* A helper function that fills in a dwarf2_loclist_baton. */
22628 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
22629 struct dwarf2_loclist_baton
*baton
,
22630 const struct attribute
*attr
)
22632 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
22634 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
22636 baton
->per_cu
= cu
->per_cu
;
22637 gdb_assert (baton
->per_cu
);
22638 /* We don't know how long the location list is, but make sure we
22639 don't run off the edge of the section. */
22640 baton
->size
= section
->size
- DW_UNSND (attr
);
22641 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
22642 baton
->base_address
= cu
->base_address
;
22643 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
22647 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
22648 struct dwarf2_cu
*cu
, int is_block
)
22650 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22651 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
22653 if (attr_form_is_section_offset (attr
)
22654 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
22655 the section. If so, fall through to the complaint in the
22657 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
22659 struct dwarf2_loclist_baton
*baton
;
22661 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
22663 fill_in_loclist_baton (cu
, baton
, attr
);
22665 if (cu
->base_known
== 0)
22666 complaint (&symfile_complaints
,
22667 _("Location list used without "
22668 "specifying the CU base address."));
22670 SYMBOL_ACLASS_INDEX (sym
) = (is_block
22671 ? dwarf2_loclist_block_index
22672 : dwarf2_loclist_index
);
22673 SYMBOL_LOCATION_BATON (sym
) = baton
;
22677 struct dwarf2_locexpr_baton
*baton
;
22679 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
22680 baton
->per_cu
= cu
->per_cu
;
22681 gdb_assert (baton
->per_cu
);
22683 if (attr_form_is_block (attr
))
22685 /* Note that we're just copying the block's data pointer
22686 here, not the actual data. We're still pointing into the
22687 info_buffer for SYM's objfile; right now we never release
22688 that buffer, but when we do clean up properly this may
22690 baton
->size
= DW_BLOCK (attr
)->size
;
22691 baton
->data
= DW_BLOCK (attr
)->data
;
22695 dwarf2_invalid_attrib_class_complaint ("location description",
22696 SYMBOL_NATURAL_NAME (sym
));
22700 SYMBOL_ACLASS_INDEX (sym
) = (is_block
22701 ? dwarf2_locexpr_block_index
22702 : dwarf2_locexpr_index
);
22703 SYMBOL_LOCATION_BATON (sym
) = baton
;
22707 /* Return the OBJFILE associated with the compilation unit CU. If CU
22708 came from a separate debuginfo file, then the master objfile is
22712 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
22714 struct objfile
*objfile
= per_cu
->objfile
;
22716 /* Return the master objfile, so that we can report and look up the
22717 correct file containing this variable. */
22718 if (objfile
->separate_debug_objfile_backlink
)
22719 objfile
= objfile
->separate_debug_objfile_backlink
;
22724 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
22725 (CU_HEADERP is unused in such case) or prepare a temporary copy at
22726 CU_HEADERP first. */
22728 static const struct comp_unit_head
*
22729 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
22730 struct dwarf2_per_cu_data
*per_cu
)
22732 const gdb_byte
*info_ptr
;
22735 return &per_cu
->cu
->header
;
22737 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
22739 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
22740 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
22741 rcuh_kind::COMPILE
);
22746 /* Return the address size given in the compilation unit header for CU. */
22749 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22751 struct comp_unit_head cu_header_local
;
22752 const struct comp_unit_head
*cu_headerp
;
22754 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22756 return cu_headerp
->addr_size
;
22759 /* Return the offset size given in the compilation unit header for CU. */
22762 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
22764 struct comp_unit_head cu_header_local
;
22765 const struct comp_unit_head
*cu_headerp
;
22767 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22769 return cu_headerp
->offset_size
;
22772 /* See its dwarf2loc.h declaration. */
22775 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
22777 struct comp_unit_head cu_header_local
;
22778 const struct comp_unit_head
*cu_headerp
;
22780 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
22782 if (cu_headerp
->version
== 2)
22783 return cu_headerp
->addr_size
;
22785 return cu_headerp
->offset_size
;
22788 /* Return the text offset of the CU. The returned offset comes from
22789 this CU's objfile. If this objfile came from a separate debuginfo
22790 file, then the offset may be different from the corresponding
22791 offset in the parent objfile. */
22794 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
22796 struct objfile
*objfile
= per_cu
->objfile
;
22798 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
22801 /* Return DWARF version number of PER_CU. */
22804 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
22806 return per_cu
->dwarf_version
;
22809 /* Locate the .debug_info compilation unit from CU's objfile which contains
22810 the DIE at OFFSET. Raises an error on failure. */
22812 static struct dwarf2_per_cu_data
*
22813 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
22814 unsigned int offset_in_dwz
,
22815 struct objfile
*objfile
)
22817 struct dwarf2_per_cu_data
*this_cu
;
22819 const sect_offset
*cu_off
;
22822 high
= dwarf2_per_objfile
->n_comp_units
- 1;
22825 struct dwarf2_per_cu_data
*mid_cu
;
22826 int mid
= low
+ (high
- low
) / 2;
22828 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
22829 cu_off
= &mid_cu
->sect_off
;
22830 if (mid_cu
->is_dwz
> offset_in_dwz
22831 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
22836 gdb_assert (low
== high
);
22837 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22838 cu_off
= &this_cu
->sect_off
;
22839 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
22841 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
22842 error (_("Dwarf Error: could not find partial DIE containing "
22843 "offset 0x%x [in module %s]"),
22844 to_underlying (sect_off
), bfd_get_filename (objfile
->obfd
));
22846 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
22848 return dwarf2_per_objfile
->all_comp_units
[low
-1];
22852 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
22853 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
22854 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
22855 error (_("invalid dwarf2 offset %u"), to_underlying (sect_off
));
22856 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
22861 /* Initialize dwarf2_cu CU, owned by PER_CU. */
22864 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
22866 memset (cu
, 0, sizeof (*cu
));
22868 cu
->per_cu
= per_cu
;
22869 cu
->objfile
= per_cu
->objfile
;
22870 obstack_init (&cu
->comp_unit_obstack
);
22873 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
22876 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
22877 enum language pretend_language
)
22879 struct attribute
*attr
;
22881 /* Set the language we're debugging. */
22882 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
22884 set_cu_language (DW_UNSND (attr
), cu
);
22887 cu
->language
= pretend_language
;
22888 cu
->language_defn
= language_def (cu
->language
);
22891 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
22894 /* Release one cached compilation unit, CU. We unlink it from the tree
22895 of compilation units, but we don't remove it from the read_in_chain;
22896 the caller is responsible for that.
22897 NOTE: DATA is a void * because this function is also used as a
22898 cleanup routine. */
22901 free_heap_comp_unit (void *data
)
22903 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22905 gdb_assert (cu
->per_cu
!= NULL
);
22906 cu
->per_cu
->cu
= NULL
;
22909 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22914 /* This cleanup function is passed the address of a dwarf2_cu on the stack
22915 when we're finished with it. We can't free the pointer itself, but be
22916 sure to unlink it from the cache. Also release any associated storage. */
22919 free_stack_comp_unit (void *data
)
22921 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) data
;
22923 gdb_assert (cu
->per_cu
!= NULL
);
22924 cu
->per_cu
->cu
= NULL
;
22927 obstack_free (&cu
->comp_unit_obstack
, NULL
);
22928 cu
->partial_dies
= NULL
;
22931 /* Free all cached compilation units. */
22934 free_cached_comp_units (void *data
)
22936 dwarf2_per_objfile
->free_cached_comp_units ();
22939 /* Increase the age counter on each cached compilation unit, and free
22940 any that are too old. */
22943 age_cached_comp_units (void)
22945 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22947 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
22948 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22949 while (per_cu
!= NULL
)
22951 per_cu
->cu
->last_used
++;
22952 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
22953 dwarf2_mark (per_cu
->cu
);
22954 per_cu
= per_cu
->cu
->read_in_chain
;
22957 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22958 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22959 while (per_cu
!= NULL
)
22961 struct dwarf2_per_cu_data
*next_cu
;
22963 next_cu
= per_cu
->cu
->read_in_chain
;
22965 if (!per_cu
->cu
->mark
)
22967 free_heap_comp_unit (per_cu
->cu
);
22968 *last_chain
= next_cu
;
22971 last_chain
= &per_cu
->cu
->read_in_chain
;
22977 /* Remove a single compilation unit from the cache. */
22980 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
22982 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
22984 per_cu
= dwarf2_per_objfile
->read_in_chain
;
22985 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
22986 while (per_cu
!= NULL
)
22988 struct dwarf2_per_cu_data
*next_cu
;
22990 next_cu
= per_cu
->cu
->read_in_chain
;
22992 if (per_cu
== target_per_cu
)
22994 free_heap_comp_unit (per_cu
->cu
);
22996 *last_chain
= next_cu
;
23000 last_chain
= &per_cu
->cu
->read_in_chain
;
23006 /* Release all extra memory associated with OBJFILE. */
23009 dwarf2_free_objfile (struct objfile
*objfile
)
23012 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
23013 dwarf2_objfile_data_key
);
23015 if (dwarf2_per_objfile
== NULL
)
23018 dwarf2_per_objfile
->~dwarf2_per_objfile ();
23021 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23022 We store these in a hash table separate from the DIEs, and preserve them
23023 when the DIEs are flushed out of cache.
23025 The CU "per_cu" pointer is needed because offset alone is not enough to
23026 uniquely identify the type. A file may have multiple .debug_types sections,
23027 or the type may come from a DWO file. Furthermore, while it's more logical
23028 to use per_cu->section+offset, with Fission the section with the data is in
23029 the DWO file but we don't know that section at the point we need it.
23030 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23031 because we can enter the lookup routine, get_die_type_at_offset, from
23032 outside this file, and thus won't necessarily have PER_CU->cu.
23033 Fortunately, PER_CU is stable for the life of the objfile. */
23035 struct dwarf2_per_cu_offset_and_type
23037 const struct dwarf2_per_cu_data
*per_cu
;
23038 sect_offset sect_off
;
23042 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23045 per_cu_offset_and_type_hash (const void *item
)
23047 const struct dwarf2_per_cu_offset_and_type
*ofs
23048 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23050 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23053 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23056 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23058 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23059 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23060 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23061 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23063 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23064 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23067 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23068 table if necessary. For convenience, return TYPE.
23070 The DIEs reading must have careful ordering to:
23071 * Not cause infite loops trying to read in DIEs as a prerequisite for
23072 reading current DIE.
23073 * Not trying to dereference contents of still incompletely read in types
23074 while reading in other DIEs.
23075 * Enable referencing still incompletely read in types just by a pointer to
23076 the type without accessing its fields.
23078 Therefore caller should follow these rules:
23079 * Try to fetch any prerequisite types we may need to build this DIE type
23080 before building the type and calling set_die_type.
23081 * After building type call set_die_type for current DIE as soon as
23082 possible before fetching more types to complete the current type.
23083 * Make the type as complete as possible before fetching more types. */
23085 static struct type
*
23086 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23088 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23089 struct objfile
*objfile
= cu
->objfile
;
23090 struct attribute
*attr
;
23091 struct dynamic_prop prop
;
23093 /* For Ada types, make sure that the gnat-specific data is always
23094 initialized (if not already set). There are a few types where
23095 we should not be doing so, because the type-specific area is
23096 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23097 where the type-specific area is used to store the floatformat).
23098 But this is not a problem, because the gnat-specific information
23099 is actually not needed for these types. */
23100 if (need_gnat_info (cu
)
23101 && TYPE_CODE (type
) != TYPE_CODE_FUNC
23102 && TYPE_CODE (type
) != TYPE_CODE_FLT
23103 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
23104 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
23105 && TYPE_CODE (type
) != TYPE_CODE_METHOD
23106 && !HAVE_GNAT_AUX_INFO (type
))
23107 INIT_GNAT_SPECIFIC (type
);
23109 /* Read DW_AT_allocated and set in type. */
23110 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23111 if (attr_form_is_block (attr
))
23113 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23114 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
, objfile
);
23116 else if (attr
!= NULL
)
23118 complaint (&symfile_complaints
,
23119 _("DW_AT_allocated has the wrong form (%s) at DIE 0x%x"),
23120 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23121 to_underlying (die
->sect_off
));
23124 /* Read DW_AT_associated and set in type. */
23125 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23126 if (attr_form_is_block (attr
))
23128 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23129 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
, objfile
);
23131 else if (attr
!= NULL
)
23133 complaint (&symfile_complaints
,
23134 _("DW_AT_associated has the wrong form (%s) at DIE 0x%x"),
23135 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23136 to_underlying (die
->sect_off
));
23139 /* Read DW_AT_data_location and set in type. */
23140 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23141 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
23142 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
, objfile
);
23144 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23146 dwarf2_per_objfile
->die_type_hash
=
23147 htab_create_alloc_ex (127,
23148 per_cu_offset_and_type_hash
,
23149 per_cu_offset_and_type_eq
,
23151 &objfile
->objfile_obstack
,
23152 hashtab_obstack_allocate
,
23153 dummy_obstack_deallocate
);
23156 ofs
.per_cu
= cu
->per_cu
;
23157 ofs
.sect_off
= die
->sect_off
;
23159 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23160 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
23162 complaint (&symfile_complaints
,
23163 _("A problem internal to GDB: DIE 0x%x has type already set"),
23164 to_underlying (die
->sect_off
));
23165 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23166 struct dwarf2_per_cu_offset_and_type
);
23171 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23172 or return NULL if the die does not have a saved type. */
23174 static struct type
*
23175 get_die_type_at_offset (sect_offset sect_off
,
23176 struct dwarf2_per_cu_data
*per_cu
)
23178 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23180 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23183 ofs
.per_cu
= per_cu
;
23184 ofs
.sect_off
= sect_off
;
23185 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23186 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
23193 /* Look up the type for DIE in CU in die_type_hash,
23194 or return NULL if DIE does not have a saved type. */
23196 static struct type
*
23197 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23199 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23202 /* Add a dependence relationship from CU to REF_PER_CU. */
23205 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23206 struct dwarf2_per_cu_data
*ref_per_cu
)
23210 if (cu
->dependencies
== NULL
)
23212 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23213 NULL
, &cu
->comp_unit_obstack
,
23214 hashtab_obstack_allocate
,
23215 dummy_obstack_deallocate
);
23217 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23219 *slot
= ref_per_cu
;
23222 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23223 Set the mark field in every compilation unit in the
23224 cache that we must keep because we are keeping CU. */
23227 dwarf2_mark_helper (void **slot
, void *data
)
23229 struct dwarf2_per_cu_data
*per_cu
;
23231 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23233 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23234 reading of the chain. As such dependencies remain valid it is not much
23235 useful to track and undo them during QUIT cleanups. */
23236 if (per_cu
->cu
== NULL
)
23239 if (per_cu
->cu
->mark
)
23241 per_cu
->cu
->mark
= 1;
23243 if (per_cu
->cu
->dependencies
!= NULL
)
23244 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23249 /* Set the mark field in CU and in every other compilation unit in the
23250 cache that we must keep because we are keeping CU. */
23253 dwarf2_mark (struct dwarf2_cu
*cu
)
23258 if (cu
->dependencies
!= NULL
)
23259 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23263 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23267 per_cu
->cu
->mark
= 0;
23268 per_cu
= per_cu
->cu
->read_in_chain
;
23272 /* Trivial hash function for partial_die_info: the hash value of a DIE
23273 is its offset in .debug_info for this objfile. */
23276 partial_die_hash (const void *item
)
23278 const struct partial_die_info
*part_die
23279 = (const struct partial_die_info
*) item
;
23281 return to_underlying (part_die
->sect_off
);
23284 /* Trivial comparison function for partial_die_info structures: two DIEs
23285 are equal if they have the same offset. */
23288 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23290 const struct partial_die_info
*part_die_lhs
23291 = (const struct partial_die_info
*) item_lhs
;
23292 const struct partial_die_info
*part_die_rhs
23293 = (const struct partial_die_info
*) item_rhs
;
23295 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23298 static struct cmd_list_element
*set_dwarf_cmdlist
;
23299 static struct cmd_list_element
*show_dwarf_cmdlist
;
23302 set_dwarf_cmd (char *args
, int from_tty
)
23304 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
23309 show_dwarf_cmd (char *args
, int from_tty
)
23311 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
23314 /* Free data associated with OBJFILE, if necessary. */
23317 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
23319 struct dwarf2_per_objfile
*data
= (struct dwarf2_per_objfile
*) d
;
23322 /* Make sure we don't accidentally use dwarf2_per_objfile while
23324 dwarf2_per_objfile
= NULL
;
23326 for (ix
= 0; ix
< data
->n_comp_units
; ++ix
)
23327 VEC_free (dwarf2_per_cu_ptr
, data
->all_comp_units
[ix
]->imported_symtabs
);
23329 for (ix
= 0; ix
< data
->n_type_units
; ++ix
)
23330 VEC_free (dwarf2_per_cu_ptr
,
23331 data
->all_type_units
[ix
]->per_cu
.imported_symtabs
);
23332 xfree (data
->all_type_units
);
23334 VEC_free (dwarf2_section_info_def
, data
->types
);
23336 if (data
->dwo_files
)
23337 free_dwo_files (data
->dwo_files
, objfile
);
23338 if (data
->dwp_file
)
23339 gdb_bfd_unref (data
->dwp_file
->dbfd
);
23341 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
23342 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
23346 /* The "save gdb-index" command. */
23348 /* In-memory buffer to prepare data to be written later to a file. */
23352 /* Copy DATA to the end of the buffer. */
23353 template<typename T
>
23354 void append_data (const T
&data
)
23356 std::copy (reinterpret_cast<const gdb_byte
*> (&data
),
23357 reinterpret_cast<const gdb_byte
*> (&data
+ 1),
23358 grow (sizeof (data
)));
23361 /* Copy CSTR (a zero-terminated string) to the end of buffer. The
23362 terminating zero is appended too. */
23363 void append_cstr0 (const char *cstr
)
23365 const size_t size
= strlen (cstr
) + 1;
23366 std::copy (cstr
, cstr
+ size
, grow (size
));
23369 /* Accept a host-format integer in VAL and append it to the buffer
23370 as a target-format integer which is LEN bytes long. */
23371 void append_uint (size_t len
, bfd_endian byte_order
, ULONGEST val
)
23373 ::store_unsigned_integer (grow (len
), len
, byte_order
, val
);
23376 /* Return the size of the buffer. */
23377 size_t size () const
23379 return m_vec
.size ();
23382 /* Write the buffer to FILE. */
23383 void file_write (FILE *file
) const
23385 if (::fwrite (m_vec
.data (), 1, m_vec
.size (), file
) != m_vec
.size ())
23386 error (_("couldn't write data to file"));
23390 /* Grow SIZE bytes at the end of the buffer. Returns a pointer to
23391 the start of the new block. */
23392 gdb_byte
*grow (size_t size
)
23394 m_vec
.resize (m_vec
.size () + size
);
23395 return &*m_vec
.end () - size
;
23398 gdb::byte_vector m_vec
;
23401 /* An entry in the symbol table. */
23402 struct symtab_index_entry
23404 /* The name of the symbol. */
23406 /* The offset of the name in the constant pool. */
23407 offset_type index_offset
;
23408 /* A sorted vector of the indices of all the CUs that hold an object
23410 std::vector
<offset_type
> cu_indices
;
23413 /* The symbol table. This is a power-of-2-sized hash table. */
23414 struct mapped_symtab
23418 data
.resize (1024);
23421 offset_type n_elements
= 0;
23422 std::vector
<symtab_index_entry
> data
;
23425 /* Find a slot in SYMTAB for the symbol NAME. Returns a reference to
23428 Function is used only during write_hash_table so no index format backward
23429 compatibility is needed. */
23431 static symtab_index_entry
&
23432 find_slot (struct mapped_symtab
*symtab
, const char *name
)
23434 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
23436 index
= hash
& (symtab
->data
.size () - 1);
23437 step
= ((hash
* 17) & (symtab
->data
.size () - 1)) | 1;
23441 if (symtab
->data
[index
].name
== NULL
23442 || strcmp (name
, symtab
->data
[index
].name
) == 0)
23443 return symtab
->data
[index
];
23444 index
= (index
+ step
) & (symtab
->data
.size () - 1);
23448 /* Expand SYMTAB's hash table. */
23451 hash_expand (struct mapped_symtab
*symtab
)
23453 auto old_entries
= std::move (symtab
->data
);
23455 symtab
->data
.clear ();
23456 symtab
->data
.resize (old_entries
.size () * 2);
23458 for (auto &it
: old_entries
)
23459 if (it
.name
!= NULL
)
23461 auto &ref
= find_slot (symtab
, it
.name
);
23462 ref
= std::move (it
);
23466 /* Add an entry to SYMTAB. NAME is the name of the symbol.
23467 CU_INDEX is the index of the CU in which the symbol appears.
23468 IS_STATIC is one if the symbol is static, otherwise zero (global). */
23471 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
23472 int is_static
, gdb_index_symbol_kind kind
,
23473 offset_type cu_index
)
23475 offset_type cu_index_and_attrs
;
23477 ++symtab
->n_elements
;
23478 if (4 * symtab
->n_elements
/ 3 >= symtab
->data
.size ())
23479 hash_expand (symtab
);
23481 symtab_index_entry
&slot
= find_slot (symtab
, name
);
23482 if (slot
.name
== NULL
)
23485 /* index_offset is set later. */
23488 cu_index_and_attrs
= 0;
23489 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
23490 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
23491 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
23493 /* We don't want to record an index value twice as we want to avoid the
23495 We process all global symbols and then all static symbols
23496 (which would allow us to avoid the duplication by only having to check
23497 the last entry pushed), but a symbol could have multiple kinds in one CU.
23498 To keep things simple we don't worry about the duplication here and
23499 sort and uniqufy the list after we've processed all symbols. */
23500 slot
.cu_indices
.push_back (cu_index_and_attrs
);
23503 /* Sort and remove duplicates of all symbols' cu_indices lists. */
23506 uniquify_cu_indices (struct mapped_symtab
*symtab
)
23508 for (auto &entry
: symtab
->data
)
23510 if (entry
.name
!= NULL
&& !entry
.cu_indices
.empty ())
23512 auto &cu_indices
= entry
.cu_indices
;
23513 std::sort (cu_indices
.begin (), cu_indices
.end ());
23514 auto from
= std::unique (cu_indices
.begin (), cu_indices
.end ());
23515 cu_indices
.erase (from
, cu_indices
.end ());
23520 /* A form of 'const char *' suitable for container keys. Only the
23521 pointer is stored. The strings themselves are compared, not the
23526 c_str_view (const char *cstr
)
23530 bool operator== (const c_str_view
&other
) const
23532 return strcmp (m_cstr
, other
.m_cstr
) == 0;
23536 friend class c_str_view_hasher
;
23537 const char *const m_cstr
;
23540 /* A std::unordered_map::hasher for c_str_view that uses the right
23541 hash function for strings in a mapped index. */
23542 class c_str_view_hasher
23545 size_t operator () (const c_str_view
&x
) const
23547 return mapped_index_string_hash (INT_MAX
, x
.m_cstr
);
23551 /* A std::unordered_map::hasher for std::vector<>. */
23552 template<typename T
>
23553 class vector_hasher
23556 size_t operator () (const std::vector
<T
> &key
) const
23558 return iterative_hash (key
.data (),
23559 sizeof (key
.front ()) * key
.size (), 0);
23563 /* Write the mapped hash table SYMTAB to the data buffer OUTPUT, with
23564 constant pool entries going into the data buffer CPOOL. */
23567 write_hash_table (mapped_symtab
*symtab
, data_buf
&output
, data_buf
&cpool
)
23570 /* Elements are sorted vectors of the indices of all the CUs that
23571 hold an object of this name. */
23572 std::unordered_map
<std::vector
<offset_type
>, offset_type
,
23573 vector_hasher
<offset_type
>>
23576 /* We add all the index vectors to the constant pool first, to
23577 ensure alignment is ok. */
23578 for (symtab_index_entry
&entry
: symtab
->data
)
23580 if (entry
.name
== NULL
)
23582 gdb_assert (entry
.index_offset
== 0);
23584 /* Finding before inserting is faster than always trying to
23585 insert, because inserting always allocates a node, does the
23586 lookup, and then destroys the new node if another node
23587 already had the same key. C++17 try_emplace will avoid
23590 = symbol_hash_table
.find (entry
.cu_indices
);
23591 if (found
!= symbol_hash_table
.end ())
23593 entry
.index_offset
= found
->second
;
23597 symbol_hash_table
.emplace (entry
.cu_indices
, cpool
.size ());
23598 entry
.index_offset
= cpool
.size ();
23599 cpool
.append_data (MAYBE_SWAP (entry
.cu_indices
.size ()));
23600 for (const auto index
: entry
.cu_indices
)
23601 cpool
.append_data (MAYBE_SWAP (index
));
23605 /* Now write out the hash table. */
23606 std::unordered_map
<c_str_view
, offset_type
, c_str_view_hasher
> str_table
;
23607 for (const auto &entry
: symtab
->data
)
23609 offset_type str_off
, vec_off
;
23611 if (entry
.name
!= NULL
)
23613 const auto insertpair
= str_table
.emplace (entry
.name
, cpool
.size ());
23614 if (insertpair
.second
)
23615 cpool
.append_cstr0 (entry
.name
);
23616 str_off
= insertpair
.first
->second
;
23617 vec_off
= entry
.index_offset
;
23621 /* While 0 is a valid constant pool index, it is not valid
23622 to have 0 for both offsets. */
23627 output
.append_data (MAYBE_SWAP (str_off
));
23628 output
.append_data (MAYBE_SWAP (vec_off
));
23632 typedef std::unordered_map
<partial_symtab
*, unsigned int> psym_index_map
;
23634 /* Helper struct for building the address table. */
23635 struct addrmap_index_data
23637 addrmap_index_data (data_buf
&addr_vec_
, psym_index_map
&cu_index_htab_
)
23638 : addr_vec (addr_vec_
), cu_index_htab (cu_index_htab_
)
23641 struct objfile
*objfile
;
23642 data_buf
&addr_vec
;
23643 psym_index_map
&cu_index_htab
;
23645 /* Non-zero if the previous_* fields are valid.
23646 We can't write an entry until we see the next entry (since it is only then
23647 that we know the end of the entry). */
23648 int previous_valid
;
23649 /* Index of the CU in the table of all CUs in the index file. */
23650 unsigned int previous_cu_index
;
23651 /* Start address of the CU. */
23652 CORE_ADDR previous_cu_start
;
23655 /* Write an address entry to ADDR_VEC. */
23658 add_address_entry (struct objfile
*objfile
, data_buf
&addr_vec
,
23659 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
23661 CORE_ADDR baseaddr
;
23663 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
23665 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
23666 addr_vec
.append_uint (8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
23667 addr_vec
.append_data (MAYBE_SWAP (cu_index
));
23670 /* Worker function for traversing an addrmap to build the address table. */
23673 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
23675 struct addrmap_index_data
*data
= (struct addrmap_index_data
*) datap
;
23676 struct partial_symtab
*pst
= (struct partial_symtab
*) obj
;
23678 if (data
->previous_valid
)
23679 add_address_entry (data
->objfile
, data
->addr_vec
,
23680 data
->previous_cu_start
, start_addr
,
23681 data
->previous_cu_index
);
23683 data
->previous_cu_start
= start_addr
;
23686 const auto it
= data
->cu_index_htab
.find (pst
);
23687 gdb_assert (it
!= data
->cu_index_htab
.cend ());
23688 data
->previous_cu_index
= it
->second
;
23689 data
->previous_valid
= 1;
23692 data
->previous_valid
= 0;
23697 /* Write OBJFILE's address map to ADDR_VEC.
23698 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
23699 in the index file. */
23702 write_address_map (struct objfile
*objfile
, data_buf
&addr_vec
,
23703 psym_index_map
&cu_index_htab
)
23705 struct addrmap_index_data
addrmap_index_data (addr_vec
, cu_index_htab
);
23707 /* When writing the address table, we have to cope with the fact that
23708 the addrmap iterator only provides the start of a region; we have to
23709 wait until the next invocation to get the start of the next region. */
23711 addrmap_index_data
.objfile
= objfile
;
23712 addrmap_index_data
.previous_valid
= 0;
23714 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
23715 &addrmap_index_data
);
23717 /* It's highly unlikely the last entry (end address = 0xff...ff)
23718 is valid, but we should still handle it.
23719 The end address is recorded as the start of the next region, but that
23720 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
23722 if (addrmap_index_data
.previous_valid
)
23723 add_address_entry (objfile
, addr_vec
,
23724 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
23725 addrmap_index_data
.previous_cu_index
);
23728 /* Return the symbol kind of PSYM. */
23730 static gdb_index_symbol_kind
23731 symbol_kind (struct partial_symbol
*psym
)
23733 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
23734 enum address_class aclass
= PSYMBOL_CLASS (psym
);
23742 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
23744 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23746 case LOC_CONST_BYTES
:
23747 case LOC_OPTIMIZED_OUT
:
23749 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23751 /* Note: It's currently impossible to recognize psyms as enum values
23752 short of reading the type info. For now punt. */
23753 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
23755 /* There are other LOC_FOO values that one might want to classify
23756 as variables, but dwarf2read.c doesn't currently use them. */
23757 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23759 case STRUCT_DOMAIN
:
23760 return GDB_INDEX_SYMBOL_KIND_TYPE
;
23762 return GDB_INDEX_SYMBOL_KIND_OTHER
;
23766 /* Add a list of partial symbols to SYMTAB. */
23769 write_psymbols (struct mapped_symtab
*symtab
,
23770 std::unordered_set
<partial_symbol
*> &psyms_seen
,
23771 struct partial_symbol
**psymp
,
23773 offset_type cu_index
,
23776 for (; count
-- > 0; ++psymp
)
23778 struct partial_symbol
*psym
= *psymp
;
23780 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
23781 error (_("Ada is not currently supported by the index"));
23783 /* Only add a given psymbol once. */
23784 if (psyms_seen
.insert (psym
).second
)
23786 gdb_index_symbol_kind kind
= symbol_kind (psym
);
23788 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
23789 is_static
, kind
, cu_index
);
23794 /* A helper struct used when iterating over debug_types. */
23795 struct signatured_type_index_data
23797 signatured_type_index_data (data_buf
&types_list_
,
23798 std::unordered_set
<partial_symbol
*> &psyms_seen_
)
23799 : types_list (types_list_
), psyms_seen (psyms_seen_
)
23802 struct objfile
*objfile
;
23803 struct mapped_symtab
*symtab
;
23804 data_buf
&types_list
;
23805 std::unordered_set
<partial_symbol
*> &psyms_seen
;
23809 /* A helper function that writes a single signatured_type to an
23813 write_one_signatured_type (void **slot
, void *d
)
23815 struct signatured_type_index_data
*info
23816 = (struct signatured_type_index_data
*) d
;
23817 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
23818 struct partial_symtab
*psymtab
= entry
->per_cu
.v
.psymtab
;
23820 write_psymbols (info
->symtab
,
23822 info
->objfile
->global_psymbols
.list
23823 + psymtab
->globals_offset
,
23824 psymtab
->n_global_syms
, info
->cu_index
,
23826 write_psymbols (info
->symtab
,
23828 info
->objfile
->static_psymbols
.list
23829 + psymtab
->statics_offset
,
23830 psymtab
->n_static_syms
, info
->cu_index
,
23833 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
23834 to_underlying (entry
->per_cu
.sect_off
));
23835 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
23836 to_underlying (entry
->type_offset_in_tu
));
23837 info
->types_list
.append_uint (8, BFD_ENDIAN_LITTLE
, entry
->signature
);
23844 /* Recurse into all "included" dependencies and count their symbols as
23845 if they appeared in this psymtab. */
23848 recursively_count_psymbols (struct partial_symtab
*psymtab
,
23849 size_t &psyms_seen
)
23851 for (int i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23852 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23853 recursively_count_psymbols (psymtab
->dependencies
[i
],
23856 psyms_seen
+= psymtab
->n_global_syms
;
23857 psyms_seen
+= psymtab
->n_static_syms
;
23860 /* Recurse into all "included" dependencies and write their symbols as
23861 if they appeared in this psymtab. */
23864 recursively_write_psymbols (struct objfile
*objfile
,
23865 struct partial_symtab
*psymtab
,
23866 struct mapped_symtab
*symtab
,
23867 std::unordered_set
<partial_symbol
*> &psyms_seen
,
23868 offset_type cu_index
)
23872 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
23873 if (psymtab
->dependencies
[i
]->user
!= NULL
)
23874 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
23875 symtab
, psyms_seen
, cu_index
);
23877 write_psymbols (symtab
,
23879 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
23880 psymtab
->n_global_syms
, cu_index
,
23882 write_psymbols (symtab
,
23884 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
23885 psymtab
->n_static_syms
, cu_index
,
23889 /* Create an index file for OBJFILE in the directory DIR. */
23892 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
23894 if (dwarf2_per_objfile
->using_index
)
23895 error (_("Cannot use an index to create the index"));
23897 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
23898 error (_("Cannot make an index when the file has multiple .debug_types sections"));
23900 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
23904 if (stat (objfile_name (objfile
), &st
) < 0)
23905 perror_with_name (objfile_name (objfile
));
23907 std::string
filename (std::string (dir
) + SLASH_STRING
23908 + lbasename (objfile_name (objfile
)) + INDEX_SUFFIX
);
23910 FILE *out_file
= gdb_fopen_cloexec (filename
.c_str (), "wb").release ();
23912 error (_("Can't open `%s' for writing"), filename
.c_str ());
23914 /* Order matters here; we want FILE to be closed before FILENAME is
23915 unlinked, because on MS-Windows one cannot delete a file that is
23916 still open. (Don't call anything here that might throw until
23917 file_closer is created.) */
23918 gdb::unlinker
unlink_file (filename
.c_str ());
23919 gdb_file_up
close_out_file (out_file
);
23921 mapped_symtab symtab
;
23924 /* While we're scanning CU's create a table that maps a psymtab pointer
23925 (which is what addrmap records) to its index (which is what is recorded
23926 in the index file). This will later be needed to write the address
23928 psym_index_map cu_index_htab
;
23929 cu_index_htab
.reserve (dwarf2_per_objfile
->n_comp_units
);
23931 /* The CU list is already sorted, so we don't need to do additional
23932 work here. Also, the debug_types entries do not appear in
23933 all_comp_units, but only in their own hash table. */
23935 /* The psyms_seen set is potentially going to be largish (~40k
23936 elements when indexing a -g3 build of GDB itself). Estimate the
23937 number of elements in order to avoid too many rehashes, which
23938 require rebuilding buckets and thus many trips to
23940 size_t psyms_count
= 0;
23941 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23943 struct dwarf2_per_cu_data
*per_cu
23944 = dwarf2_per_objfile
->all_comp_units
[i
];
23945 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23947 if (psymtab
!= NULL
&& psymtab
->user
== NULL
)
23948 recursively_count_psymbols (psymtab
, psyms_count
);
23950 /* Generating an index for gdb itself shows a ratio of
23951 TOTAL_SEEN_SYMS/UNIQUE_SYMS or ~5. 4 seems like a good bet. */
23952 std::unordered_set
<partial_symbol
*> psyms_seen (psyms_count
/ 4);
23953 for (int i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
23955 struct dwarf2_per_cu_data
*per_cu
23956 = dwarf2_per_objfile
->all_comp_units
[i
];
23957 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
23959 /* CU of a shared file from 'dwz -m' may be unused by this main file.
23960 It may be referenced from a local scope but in such case it does not
23961 need to be present in .gdb_index. */
23962 if (psymtab
== NULL
)
23965 if (psymtab
->user
== NULL
)
23966 recursively_write_psymbols (objfile
, psymtab
, &symtab
,
23969 const auto insertpair
= cu_index_htab
.emplace (psymtab
, i
);
23970 gdb_assert (insertpair
.second
);
23972 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
,
23973 to_underlying (per_cu
->sect_off
));
23974 cu_list
.append_uint (8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
23977 /* Dump the address map. */
23979 write_address_map (objfile
, addr_vec
, cu_index_htab
);
23981 /* Write out the .debug_type entries, if any. */
23982 data_buf types_cu_list
;
23983 if (dwarf2_per_objfile
->signatured_types
)
23985 signatured_type_index_data
sig_data (types_cu_list
,
23988 sig_data
.objfile
= objfile
;
23989 sig_data
.symtab
= &symtab
;
23990 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
23991 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
23992 write_one_signatured_type
, &sig_data
);
23995 /* Now that we've processed all symbols we can shrink their cu_indices
23997 uniquify_cu_indices (&symtab
);
23999 data_buf symtab_vec
, constant_pool
;
24000 write_hash_table (&symtab
, symtab_vec
, constant_pool
);
24003 const offset_type size_of_contents
= 6 * sizeof (offset_type
);
24004 offset_type total_len
= size_of_contents
;
24006 /* The version number. */
24007 contents
.append_data (MAYBE_SWAP (8));
24009 /* The offset of the CU list from the start of the file. */
24010 contents
.append_data (MAYBE_SWAP (total_len
));
24011 total_len
+= cu_list
.size ();
24013 /* The offset of the types CU list from the start of the file. */
24014 contents
.append_data (MAYBE_SWAP (total_len
));
24015 total_len
+= types_cu_list
.size ();
24017 /* The offset of the address table from the start of the file. */
24018 contents
.append_data (MAYBE_SWAP (total_len
));
24019 total_len
+= addr_vec
.size ();
24021 /* The offset of the symbol table from the start of the file. */
24022 contents
.append_data (MAYBE_SWAP (total_len
));
24023 total_len
+= symtab_vec
.size ();
24025 /* The offset of the constant pool from the start of the file. */
24026 contents
.append_data (MAYBE_SWAP (total_len
));
24027 total_len
+= constant_pool
.size ();
24029 gdb_assert (contents
.size () == size_of_contents
);
24031 contents
.file_write (out_file
);
24032 cu_list
.file_write (out_file
);
24033 types_cu_list
.file_write (out_file
);
24034 addr_vec
.file_write (out_file
);
24035 symtab_vec
.file_write (out_file
);
24036 constant_pool
.file_write (out_file
);
24038 /* We want to keep the file. */
24039 unlink_file
.keep ();
24042 /* Implementation of the `save gdb-index' command.
24044 Note that the file format used by this command is documented in the
24045 GDB manual. Any changes here must be documented there. */
24048 save_gdb_index_command (char *arg
, int from_tty
)
24050 struct objfile
*objfile
;
24053 error (_("usage: save gdb-index DIRECTORY"));
24055 ALL_OBJFILES (objfile
)
24059 /* If the objfile does not correspond to an actual file, skip it. */
24060 if (stat (objfile_name (objfile
), &st
) < 0)
24064 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
24065 dwarf2_objfile_data_key
);
24066 if (dwarf2_per_objfile
)
24071 write_psymtabs_to_index (objfile
, arg
);
24073 CATCH (except
, RETURN_MASK_ERROR
)
24075 exception_fprintf (gdb_stderr
, except
,
24076 _("Error while writing index for `%s': "),
24077 objfile_name (objfile
));
24086 int dwarf_always_disassemble
;
24089 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
24090 struct cmd_list_element
*c
, const char *value
)
24092 fprintf_filtered (file
,
24093 _("Whether to always disassemble "
24094 "DWARF expressions is %s.\n"),
24099 show_check_physname (struct ui_file
*file
, int from_tty
,
24100 struct cmd_list_element
*c
, const char *value
)
24102 fprintf_filtered (file
,
24103 _("Whether to check \"physname\" is %s.\n"),
24108 _initialize_dwarf2_read (void)
24110 struct cmd_list_element
*c
;
24112 dwarf2_objfile_data_key
24113 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
24115 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
24116 Set DWARF specific variables.\n\
24117 Configure DWARF variables such as the cache size"),
24118 &set_dwarf_cmdlist
, "maintenance set dwarf ",
24119 0/*allow-unknown*/, &maintenance_set_cmdlist
);
24121 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
24122 Show DWARF specific variables\n\
24123 Show DWARF variables such as the cache size"),
24124 &show_dwarf_cmdlist
, "maintenance show dwarf ",
24125 0/*allow-unknown*/, &maintenance_show_cmdlist
);
24127 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
24128 &dwarf_max_cache_age
, _("\
24129 Set the upper bound on the age of cached DWARF compilation units."), _("\
24130 Show the upper bound on the age of cached DWARF compilation units."), _("\
24131 A higher limit means that cached compilation units will be stored\n\
24132 in memory longer, and more total memory will be used. Zero disables\n\
24133 caching, which can slow down startup."),
24135 show_dwarf_max_cache_age
,
24136 &set_dwarf_cmdlist
,
24137 &show_dwarf_cmdlist
);
24139 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
24140 &dwarf_always_disassemble
, _("\
24141 Set whether `info address' always disassembles DWARF expressions."), _("\
24142 Show whether `info address' always disassembles DWARF expressions."), _("\
24143 When enabled, DWARF expressions are always printed in an assembly-like\n\
24144 syntax. When disabled, expressions will be printed in a more\n\
24145 conversational style, when possible."),
24147 show_dwarf_always_disassemble
,
24148 &set_dwarf_cmdlist
,
24149 &show_dwarf_cmdlist
);
24151 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
24152 Set debugging of the DWARF reader."), _("\
24153 Show debugging of the DWARF reader."), _("\
24154 When enabled (non-zero), debugging messages are printed during DWARF\n\
24155 reading and symtab expansion. A value of 1 (one) provides basic\n\
24156 information. A value greater than 1 provides more verbose information."),
24159 &setdebuglist
, &showdebuglist
);
24161 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
24162 Set debugging of the DWARF DIE reader."), _("\
24163 Show debugging of the DWARF DIE reader."), _("\
24164 When enabled (non-zero), DIEs are dumped after they are read in.\n\
24165 The value is the maximum depth to print."),
24168 &setdebuglist
, &showdebuglist
);
24170 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
24171 Set debugging of the dwarf line reader."), _("\
24172 Show debugging of the dwarf line reader."), _("\
24173 When enabled (non-zero), line number entries are dumped as they are read in.\n\
24174 A value of 1 (one) provides basic information.\n\
24175 A value greater than 1 provides more verbose information."),
24178 &setdebuglist
, &showdebuglist
);
24180 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
24181 Set cross-checking of \"physname\" code against demangler."), _("\
24182 Show cross-checking of \"physname\" code against demangler."), _("\
24183 When enabled, GDB's internal \"physname\" code is checked against\n\
24185 NULL
, show_check_physname
,
24186 &setdebuglist
, &showdebuglist
);
24188 add_setshow_boolean_cmd ("use-deprecated-index-sections",
24189 no_class
, &use_deprecated_index_sections
, _("\
24190 Set whether to use deprecated gdb_index sections."), _("\
24191 Show whether to use deprecated gdb_index sections."), _("\
24192 When enabled, deprecated .gdb_index sections are used anyway.\n\
24193 Normally they are ignored either because of a missing feature or\n\
24194 performance issue.\n\
24195 Warning: This option must be enabled before gdb reads the file."),
24198 &setlist
, &showlist
);
24200 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
24202 Save a gdb-index file.\n\
24203 Usage: save gdb-index DIRECTORY"),
24205 set_cmd_completer (c
, filename_completer
);
24207 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24208 &dwarf2_locexpr_funcs
);
24209 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24210 &dwarf2_loclist_funcs
);
24212 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24213 &dwarf2_block_frame_base_locexpr_funcs
);
24214 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24215 &dwarf2_block_frame_base_loclist_funcs
);