1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2012 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. */
39 #include "gdb-demangle.h"
40 #include "expression.h"
41 #include "filenames.h" /* for DOSish file names */
44 #include "complaints.h"
46 #include "dwarf2expr.h"
47 #include "dwarf2loc.h"
48 #include "cp-support.h"
54 #include "typeprint.h"
57 #include "exceptions.h"
59 #include "completer.h"
64 #include "gdbcore.h" /* for gnutarget */
65 #include "gdb/gdb-index.h"
71 #include "gdb_string.h"
72 #include "gdb_assert.h"
73 #include <sys/types.h>
75 typedef struct symbol
*symbolp
;
78 /* When non-zero, print basic high level tracing messages.
79 This is in contrast to the low level DIE reading of dwarf2_die_debug. */
80 static int dwarf2_read_debug
= 0;
82 /* When non-zero, dump DIEs after they are read in. */
83 static unsigned int dwarf2_die_debug
= 0;
85 /* When non-zero, cross-check physname against demangler. */
86 static int check_physname
= 0;
88 /* When non-zero, do not reject deprecated .gdb_index sections. */
89 static int use_deprecated_index_sections
= 0;
91 /* When set, the file that we're processing is known to have debugging
92 info for C++ namespaces. GCC 3.3.x did not produce this information,
93 but later versions do. */
95 static int processing_has_namespace_info
;
97 static const struct objfile_data
*dwarf2_objfile_data_key
;
99 struct dwarf2_section_info
104 /* True if we have tried to read this section. */
108 typedef struct dwarf2_section_info dwarf2_section_info_def
;
109 DEF_VEC_O (dwarf2_section_info_def
);
111 /* All offsets in the index are of this type. It must be
112 architecture-independent. */
113 typedef uint32_t offset_type
;
115 DEF_VEC_I (offset_type
);
117 /* Ensure only legit values are used. */
118 #define DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE(cu_index, value) \
120 gdb_assert ((unsigned int) (value) <= 1); \
121 GDB_INDEX_SYMBOL_STATIC_SET_VALUE((cu_index), (value)); \
124 /* Ensure only legit values are used. */
125 #define DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE(cu_index, value) \
127 gdb_assert ((value) >= GDB_INDEX_SYMBOL_KIND_TYPE \
128 && (value) <= GDB_INDEX_SYMBOL_KIND_OTHER); \
129 GDB_INDEX_SYMBOL_KIND_SET_VALUE((cu_index), (value)); \
132 /* Ensure we don't use more than the alloted nuber of bits for the CU. */
133 #define DW2_GDB_INDEX_CU_SET_VALUE(cu_index, value) \
135 gdb_assert (((value) & ~GDB_INDEX_CU_MASK) == 0); \
136 GDB_INDEX_CU_SET_VALUE((cu_index), (value)); \
139 /* A description of the mapped index. The file format is described in
140 a comment by the code that writes the index. */
143 /* Index data format version. */
146 /* The total length of the buffer. */
149 /* A pointer to the address table data. */
150 const gdb_byte
*address_table
;
152 /* Size of the address table data in bytes. */
153 offset_type address_table_size
;
155 /* The symbol table, implemented as a hash table. */
156 const offset_type
*symbol_table
;
158 /* Size in slots, each slot is 2 offset_types. */
159 offset_type symbol_table_slots
;
161 /* A pointer to the constant pool. */
162 const char *constant_pool
;
165 typedef struct dwarf2_per_cu_data
*dwarf2_per_cu_ptr
;
166 DEF_VEC_P (dwarf2_per_cu_ptr
);
168 /* Collection of data recorded per objfile.
169 This hangs off of dwarf2_objfile_data_key. */
171 struct dwarf2_per_objfile
173 struct dwarf2_section_info info
;
174 struct dwarf2_section_info abbrev
;
175 struct dwarf2_section_info line
;
176 struct dwarf2_section_info loc
;
177 struct dwarf2_section_info macinfo
;
178 struct dwarf2_section_info macro
;
179 struct dwarf2_section_info str
;
180 struct dwarf2_section_info ranges
;
181 struct dwarf2_section_info addr
;
182 struct dwarf2_section_info frame
;
183 struct dwarf2_section_info eh_frame
;
184 struct dwarf2_section_info gdb_index
;
186 VEC (dwarf2_section_info_def
) *types
;
189 struct objfile
*objfile
;
191 /* Table of all the compilation units. This is used to locate
192 the target compilation unit of a particular reference. */
193 struct dwarf2_per_cu_data
**all_comp_units
;
195 /* The number of compilation units in ALL_COMP_UNITS. */
198 /* The number of .debug_types-related CUs. */
201 /* The .debug_types-related CUs (TUs). */
202 struct signatured_type
**all_type_units
;
204 /* The number of entries in all_type_unit_groups. */
205 int n_type_unit_groups
;
207 /* Table of type unit groups.
208 This exists to make it easy to iterate over all CUs and TU groups. */
209 struct type_unit_group
**all_type_unit_groups
;
211 /* Table of struct type_unit_group objects.
212 The hash key is the DW_AT_stmt_list value. */
213 htab_t type_unit_groups
;
215 /* A table mapping .debug_types signatures to its signatured_type entry.
216 This is NULL if the .debug_types section hasn't been read in yet. */
217 htab_t signatured_types
;
219 /* Type unit statistics, to see how well the scaling improvements
223 int nr_uniq_abbrev_tables
;
225 int nr_symtab_sharers
;
226 int nr_stmt_less_type_units
;
229 /* A chain of compilation units that are currently read in, so that
230 they can be freed later. */
231 struct dwarf2_per_cu_data
*read_in_chain
;
233 /* A table mapping DW_AT_dwo_name values to struct dwo_file objects.
234 This is NULL if the table hasn't been allocated yet. */
237 /* The shared '.dwz' file, if one exists. This is used when the
238 original data was compressed using 'dwz -m'. */
239 struct dwz_file
*dwz_file
;
241 /* A flag indicating wether this objfile has a section loaded at a
243 int has_section_at_zero
;
245 /* True if we are using the mapped index,
246 or we are faking it for OBJF_READNOW's sake. */
247 unsigned char using_index
;
249 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
250 struct mapped_index
*index_table
;
252 /* When using index_table, this keeps track of all quick_file_names entries.
253 TUs can share line table entries with CUs or other TUs, and there can be
254 a lot more TUs than unique line tables, so we maintain a separate table
255 of all line table entries to support the sharing. */
256 htab_t quick_file_names_table
;
258 /* Set during partial symbol reading, to prevent queueing of full
260 int reading_partial_symbols
;
262 /* Table mapping type DIEs to their struct type *.
263 This is NULL if not allocated yet.
264 The mapping is done via (CU/TU signature + DIE offset) -> type. */
265 htab_t die_type_hash
;
267 /* The CUs we recently read. */
268 VEC (dwarf2_per_cu_ptr
) *just_read_cus
;
271 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
273 /* Default names of the debugging sections. */
275 /* Note that if the debugging section has been compressed, it might
276 have a name like .zdebug_info. */
278 static const struct dwarf2_debug_sections dwarf2_elf_names
=
280 { ".debug_info", ".zdebug_info" },
281 { ".debug_abbrev", ".zdebug_abbrev" },
282 { ".debug_line", ".zdebug_line" },
283 { ".debug_loc", ".zdebug_loc" },
284 { ".debug_macinfo", ".zdebug_macinfo" },
285 { ".debug_macro", ".zdebug_macro" },
286 { ".debug_str", ".zdebug_str" },
287 { ".debug_ranges", ".zdebug_ranges" },
288 { ".debug_types", ".zdebug_types" },
289 { ".debug_addr", ".zdebug_addr" },
290 { ".debug_frame", ".zdebug_frame" },
291 { ".eh_frame", NULL
},
292 { ".gdb_index", ".zgdb_index" },
296 /* List of DWO sections. */
298 static const struct dwo_section_names
300 struct dwarf2_section_names abbrev_dwo
;
301 struct dwarf2_section_names info_dwo
;
302 struct dwarf2_section_names line_dwo
;
303 struct dwarf2_section_names loc_dwo
;
304 struct dwarf2_section_names macinfo_dwo
;
305 struct dwarf2_section_names macro_dwo
;
306 struct dwarf2_section_names str_dwo
;
307 struct dwarf2_section_names str_offsets_dwo
;
308 struct dwarf2_section_names types_dwo
;
312 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
313 { ".debug_info.dwo", ".zdebug_info.dwo" },
314 { ".debug_line.dwo", ".zdebug_line.dwo" },
315 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
316 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
317 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
318 { ".debug_str.dwo", ".zdebug_str.dwo" },
319 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
320 { ".debug_types.dwo", ".zdebug_types.dwo" },
323 /* local data types */
325 /* The data in a compilation unit header, after target2host
326 translation, looks like this. */
327 struct comp_unit_head
331 unsigned char addr_size
;
332 unsigned char signed_addr_p
;
333 sect_offset abbrev_offset
;
335 /* Size of file offsets; either 4 or 8. */
336 unsigned int offset_size
;
338 /* Size of the length field; either 4 or 12. */
339 unsigned int initial_length_size
;
341 /* Offset to the first byte of this compilation unit header in the
342 .debug_info section, for resolving relative reference dies. */
345 /* Offset to first die in this cu from the start of the cu.
346 This will be the first byte following the compilation unit header. */
347 cu_offset first_die_offset
;
350 /* Type used for delaying computation of method physnames.
351 See comments for compute_delayed_physnames. */
352 struct delayed_method_info
354 /* The type to which the method is attached, i.e., its parent class. */
357 /* The index of the method in the type's function fieldlists. */
360 /* The index of the method in the fieldlist. */
363 /* The name of the DIE. */
366 /* The DIE associated with this method. */
367 struct die_info
*die
;
370 typedef struct delayed_method_info delayed_method_info
;
371 DEF_VEC_O (delayed_method_info
);
373 /* Internal state when decoding a particular compilation unit. */
376 /* The objfile containing this compilation unit. */
377 struct objfile
*objfile
;
379 /* The header of the compilation unit. */
380 struct comp_unit_head header
;
382 /* Base address of this compilation unit. */
383 CORE_ADDR base_address
;
385 /* Non-zero if base_address has been set. */
388 /* The language we are debugging. */
389 enum language language
;
390 const struct language_defn
*language_defn
;
392 const char *producer
;
394 /* The generic symbol table building routines have separate lists for
395 file scope symbols and all all other scopes (local scopes). So
396 we need to select the right one to pass to add_symbol_to_list().
397 We do it by keeping a pointer to the correct list in list_in_scope.
399 FIXME: The original dwarf code just treated the file scope as the
400 first local scope, and all other local scopes as nested local
401 scopes, and worked fine. Check to see if we really need to
402 distinguish these in buildsym.c. */
403 struct pending
**list_in_scope
;
405 /* The abbrev table for this CU.
406 Normally this points to the abbrev table in the objfile.
407 But if DWO_UNIT is non-NULL this is the abbrev table in the DWO file. */
408 struct abbrev_table
*abbrev_table
;
410 /* Hash table holding all the loaded partial DIEs
411 with partial_die->offset.SECT_OFF as hash. */
414 /* Storage for things with the same lifetime as this read-in compilation
415 unit, including partial DIEs. */
416 struct obstack comp_unit_obstack
;
418 /* When multiple dwarf2_cu structures are living in memory, this field
419 chains them all together, so that they can be released efficiently.
420 We will probably also want a generation counter so that most-recently-used
421 compilation units are cached... */
422 struct dwarf2_per_cu_data
*read_in_chain
;
424 /* Backchain to our per_cu entry if the tree has been built. */
425 struct dwarf2_per_cu_data
*per_cu
;
427 /* How many compilation units ago was this CU last referenced? */
430 /* A hash table of DIE cu_offset for following references with
431 die_info->offset.sect_off as hash. */
434 /* Full DIEs if read in. */
435 struct die_info
*dies
;
437 /* A set of pointers to dwarf2_per_cu_data objects for compilation
438 units referenced by this one. Only set during full symbol processing;
439 partial symbol tables do not have dependencies. */
442 /* Header data from the line table, during full symbol processing. */
443 struct line_header
*line_header
;
445 /* A list of methods which need to have physnames computed
446 after all type information has been read. */
447 VEC (delayed_method_info
) *method_list
;
449 /* To be copied to symtab->call_site_htab. */
450 htab_t call_site_htab
;
452 /* Non-NULL if this CU came from a DWO file.
453 There is an invariant here that is important to remember:
454 Except for attributes copied from the top level DIE in the "main"
455 (or "stub") file in preparation for reading the DWO file
456 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
457 Either there isn't a DWO file (in which case this is NULL and the point
458 is moot), or there is and either we're not going to read it (in which
459 case this is NULL) or there is and we are reading it (in which case this
461 struct dwo_unit
*dwo_unit
;
463 /* The DW_AT_addr_base attribute if present, zero otherwise
464 (zero is a valid value though).
465 Note this value comes from the stub CU/TU's DIE. */
468 /* The DW_AT_ranges_base attribute if present, zero otherwise
469 (zero is a valid value though).
470 Note this value comes from the stub CU/TU's DIE.
471 Also note that the value is zero in the non-DWO case so this value can
472 be used without needing to know whether DWO files are in use or not. */
473 ULONGEST ranges_base
;
475 /* Mark used when releasing cached dies. */
476 unsigned int mark
: 1;
478 /* This CU references .debug_loc. See the symtab->locations_valid field.
479 This test is imperfect as there may exist optimized debug code not using
480 any location list and still facing inlining issues if handled as
481 unoptimized code. For a future better test see GCC PR other/32998. */
482 unsigned int has_loclist
: 1;
484 /* These cache the results for producer_is_gxx_lt_4_6 and producer_is_icc.
485 CHECKED_PRODUCER is set if both PRODUCER_IS_GXX_LT_4_6 and PRODUCER_IS_ICC
486 are valid. This information is cached because profiling CU expansion
487 showed excessive time spent in producer_is_gxx_lt_4_6. */
488 unsigned int checked_producer
: 1;
489 unsigned int producer_is_gxx_lt_4_6
: 1;
490 unsigned int producer_is_icc
: 1;
493 /* Persistent data held for a compilation unit, even when not
494 processing it. We put a pointer to this structure in the
495 read_symtab_private field of the psymtab. */
497 struct dwarf2_per_cu_data
499 /* The start offset and length of this compilation unit.
500 NOTE: Unlike comp_unit_head.length, this length includes
502 If the DIE refers to a DWO file, this is always of the original die,
507 /* Flag indicating this compilation unit will be read in before
508 any of the current compilation units are processed. */
509 unsigned int queued
: 1;
511 /* This flag will be set when reading partial DIEs if we need to load
512 absolutely all DIEs for this compilation unit, instead of just the ones
513 we think are interesting. It gets set if we look for a DIE in the
514 hash table and don't find it. */
515 unsigned int load_all_dies
: 1;
517 /* Non-zero if this CU is from .debug_types. */
518 unsigned int is_debug_types
: 1;
520 /* Non-zero if this CU is from the .dwz file. */
521 unsigned int is_dwz
: 1;
523 /* The section this CU/TU lives in.
524 If the DIE refers to a DWO file, this is always the original die,
526 struct dwarf2_section_info
*info_or_types_section
;
528 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
529 of the CU cache it gets reset to NULL again. */
530 struct dwarf2_cu
*cu
;
532 /* The corresponding objfile.
533 Normally we can get the objfile from dwarf2_per_objfile.
534 However we can enter this file with just a "per_cu" handle. */
535 struct objfile
*objfile
;
537 /* When using partial symbol tables, the 'psymtab' field is active.
538 Otherwise the 'quick' field is active. */
541 /* The partial symbol table associated with this compilation unit,
542 or NULL for unread partial units. */
543 struct partial_symtab
*psymtab
;
545 /* Data needed by the "quick" functions. */
546 struct dwarf2_per_cu_quick_data
*quick
;
551 /* The CUs we import using DW_TAG_imported_unit. This is filled in
552 while reading psymtabs, used to compute the psymtab dependencies,
553 and then cleared. Then it is filled in again while reading full
554 symbols, and only deleted when the objfile is destroyed. */
555 VEC (dwarf2_per_cu_ptr
) *imported_symtabs
;
557 /* Type units are grouped by their DW_AT_stmt_list entry so that they
558 can share them. If this is a TU, this points to the containing
560 struct type_unit_group
*type_unit_group
;
564 /* Entry in the signatured_types hash table. */
566 struct signatured_type
568 /* The "per_cu" object of this type.
569 N.B.: This is the first member so that it's easy to convert pointers
571 struct dwarf2_per_cu_data per_cu
;
573 /* The type's signature. */
576 /* Offset in the TU of the type's DIE, as read from the TU header.
577 If the definition lives in a DWO file, this value is unusable. */
578 cu_offset type_offset_in_tu
;
580 /* Offset in the section of the type's DIE.
581 If the definition lives in a DWO file, this is the offset in the
582 .debug_types.dwo section.
583 The value is zero until the actual value is known.
584 Zero is otherwise not a valid section offset. */
585 sect_offset type_offset_in_section
;
588 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
589 This includes type_unit_group and quick_file_names. */
591 struct stmt_list_hash
593 /* The DWO unit this table is from or NULL if there is none. */
594 struct dwo_unit
*dwo_unit
;
596 /* Offset in .debug_line or .debug_line.dwo. */
597 sect_offset line_offset
;
600 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
601 an object of this type. */
603 struct type_unit_group
605 /* dwarf2read.c's main "handle" on the symtab.
606 To simplify things we create an artificial CU that "includes" all the
607 type units using this stmt_list so that the rest of the code still has
608 a "per_cu" handle on the symtab.
609 This PER_CU is recognized by having no section. */
610 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
611 struct dwarf2_per_cu_data per_cu
;
615 /* The TUs that share this DW_AT_stmt_list entry.
616 This is added to while parsing type units to build partial symtabs,
617 and is deleted afterwards and not used again. */
618 VEC (dwarf2_per_cu_ptr
) *tus
;
620 /* When reading the line table in "quick" functions, we need a real TU.
621 Any will do, we know they all share the same DW_AT_stmt_list entry.
622 For simplicity's sake, we pick the first one. */
623 struct dwarf2_per_cu_data
*first_tu
;
626 /* The primary symtab.
627 Type units in a group needn't all be defined in the same source file,
628 so we create an essentially anonymous symtab as the primary symtab. */
629 struct symtab
*primary_symtab
;
631 /* The data used to construct the hash key. */
632 struct stmt_list_hash hash
;
634 /* The number of symtabs from the line header.
635 The value here must match line_header.num_file_names. */
636 unsigned int num_symtabs
;
638 /* The symbol tables for this TU (obtained from the files listed in
640 WARNING: The order of entries here must match the order of entries
641 in the line header. After the first TU using this type_unit_group, the
642 line header for the subsequent TUs is recreated from this. This is done
643 because we need to use the same symtabs for each TU using the same
644 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
645 there's no guarantee the line header doesn't have duplicate entries. */
646 struct symtab
**symtabs
;
649 /* These sections are what may appear in a "dwo" file. */
653 struct dwarf2_section_info abbrev
;
654 struct dwarf2_section_info info
;
655 struct dwarf2_section_info line
;
656 struct dwarf2_section_info loc
;
657 struct dwarf2_section_info macinfo
;
658 struct dwarf2_section_info macro
;
659 struct dwarf2_section_info str
;
660 struct dwarf2_section_info str_offsets
;
661 VEC (dwarf2_section_info_def
) *types
;
664 /* Common bits of DWO CUs/TUs. */
668 /* Backlink to the containing struct dwo_file. */
669 struct dwo_file
*dwo_file
;
671 /* The "id" that distinguishes this CU/TU.
672 .debug_info calls this "dwo_id", .debug_types calls this "signature".
673 Since signatures came first, we stick with it for consistency. */
676 /* The section this CU/TU lives in, in the DWO file. */
677 struct dwarf2_section_info
*info_or_types_section
;
679 /* Same as dwarf2_per_cu_data:{offset,length} but for the DWO section. */
683 /* For types, offset in the type's DIE of the type defined by this TU. */
684 cu_offset type_offset_in_tu
;
687 /* Data for one DWO file. */
691 /* The DW_AT_GNU_dwo_name attribute.
692 We don't manage space for this, it's an attribute. */
693 const char *dwo_name
;
695 /* The bfd, when the file is open. Otherwise this is NULL. */
698 /* Section info for this file. */
699 struct dwo_sections sections
;
701 /* Table of CUs in the file.
702 Each element is a struct dwo_unit. */
705 /* Table of TUs in the file.
706 Each element is a struct dwo_unit. */
710 /* This represents a '.dwz' file. */
714 /* A dwz file can only contain a few sections. */
715 struct dwarf2_section_info abbrev
;
716 struct dwarf2_section_info info
;
717 struct dwarf2_section_info str
;
718 struct dwarf2_section_info line
;
719 struct dwarf2_section_info macro
;
720 struct dwarf2_section_info gdb_index
;
726 /* Struct used to pass misc. parameters to read_die_and_children, et
727 al. which are used for both .debug_info and .debug_types dies.
728 All parameters here are unchanging for the life of the call. This
729 struct exists to abstract away the constant parameters of die reading. */
731 struct die_reader_specs
733 /* die_section->asection->owner. */
736 /* The CU of the DIE we are parsing. */
737 struct dwarf2_cu
*cu
;
739 /* Non-NULL if reading a DWO file. */
740 struct dwo_file
*dwo_file
;
742 /* The section the die comes from.
743 This is either .debug_info or .debug_types, or the .dwo variants. */
744 struct dwarf2_section_info
*die_section
;
746 /* die_section->buffer. */
749 /* The end of the buffer. */
750 const gdb_byte
*buffer_end
;
753 /* Type of function passed to init_cutu_and_read_dies, et.al. */
754 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
756 struct die_info
*comp_unit_die
,
760 /* The line number information for a compilation unit (found in the
761 .debug_line section) begins with a "statement program header",
762 which contains the following information. */
765 unsigned int total_length
;
766 unsigned short version
;
767 unsigned int header_length
;
768 unsigned char minimum_instruction_length
;
769 unsigned char maximum_ops_per_instruction
;
770 unsigned char default_is_stmt
;
772 unsigned char line_range
;
773 unsigned char opcode_base
;
775 /* standard_opcode_lengths[i] is the number of operands for the
776 standard opcode whose value is i. This means that
777 standard_opcode_lengths[0] is unused, and the last meaningful
778 element is standard_opcode_lengths[opcode_base - 1]. */
779 unsigned char *standard_opcode_lengths
;
781 /* The include_directories table. NOTE! These strings are not
782 allocated with xmalloc; instead, they are pointers into
783 debug_line_buffer. If you try to free them, `free' will get
785 unsigned int num_include_dirs
, include_dirs_size
;
788 /* The file_names table. NOTE! These strings are not allocated
789 with xmalloc; instead, they are pointers into debug_line_buffer.
790 Don't try to free them directly. */
791 unsigned int num_file_names
, file_names_size
;
795 unsigned int dir_index
;
796 unsigned int mod_time
;
798 int included_p
; /* Non-zero if referenced by the Line Number Program. */
799 struct symtab
*symtab
; /* The associated symbol table, if any. */
802 /* The start and end of the statement program following this
803 header. These point into dwarf2_per_objfile->line_buffer. */
804 gdb_byte
*statement_program_start
, *statement_program_end
;
807 /* When we construct a partial symbol table entry we only
808 need this much information. */
809 struct partial_die_info
811 /* Offset of this DIE. */
814 /* DWARF-2 tag for this DIE. */
815 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
817 /* Assorted flags describing the data found in this DIE. */
818 unsigned int has_children
: 1;
819 unsigned int is_external
: 1;
820 unsigned int is_declaration
: 1;
821 unsigned int has_type
: 1;
822 unsigned int has_specification
: 1;
823 unsigned int has_pc_info
: 1;
824 unsigned int may_be_inlined
: 1;
826 /* Flag set if the SCOPE field of this structure has been
828 unsigned int scope_set
: 1;
830 /* Flag set if the DIE has a byte_size attribute. */
831 unsigned int has_byte_size
: 1;
833 /* Flag set if any of the DIE's children are template arguments. */
834 unsigned int has_template_arguments
: 1;
836 /* Flag set if fixup_partial_die has been called on this die. */
837 unsigned int fixup_called
: 1;
839 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
840 unsigned int is_dwz
: 1;
842 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
843 unsigned int spec_is_dwz
: 1;
845 /* The name of this DIE. Normally the value of DW_AT_name, but
846 sometimes a default name for unnamed DIEs. */
849 /* The linkage name, if present. */
850 const char *linkage_name
;
852 /* The scope to prepend to our children. This is generally
853 allocated on the comp_unit_obstack, so will disappear
854 when this compilation unit leaves the cache. */
857 /* Some data associated with the partial DIE. The tag determines
858 which field is live. */
861 /* The location description associated with this DIE, if any. */
862 struct dwarf_block
*locdesc
;
863 /* The offset of an import, for DW_TAG_imported_unit. */
867 /* If HAS_PC_INFO, the PC range associated with this DIE. */
871 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
872 DW_AT_sibling, if any. */
873 /* NOTE: This member isn't strictly necessary, read_partial_die could
874 return DW_AT_sibling values to its caller load_partial_dies. */
877 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
878 DW_AT_specification (or DW_AT_abstract_origin or
880 sect_offset spec_offset
;
882 /* Pointers to this DIE's parent, first child, and next sibling,
884 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
887 /* This data structure holds the information of an abbrev. */
890 unsigned int number
; /* number identifying abbrev */
891 enum dwarf_tag tag
; /* dwarf tag */
892 unsigned short has_children
; /* boolean */
893 unsigned short num_attrs
; /* number of attributes */
894 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
895 struct abbrev_info
*next
; /* next in chain */
900 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
901 ENUM_BITFIELD(dwarf_form
) form
: 16;
904 /* Size of abbrev_table.abbrev_hash_table. */
905 #define ABBREV_HASH_SIZE 121
907 /* Top level data structure to contain an abbreviation table. */
911 /* Where the abbrev table came from.
912 This is used as a sanity check when the table is used. */
915 /* Storage for the abbrev table. */
916 struct obstack abbrev_obstack
;
918 /* Hash table of abbrevs.
919 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
920 It could be statically allocated, but the previous code didn't so we
922 struct abbrev_info
**abbrevs
;
925 /* Attributes have a name and a value. */
928 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
929 ENUM_BITFIELD(dwarf_form
) form
: 15;
931 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
932 field should be in u.str (existing only for DW_STRING) but it is kept
933 here for better struct attribute alignment. */
934 unsigned int string_is_canonical
: 1;
939 struct dwarf_block
*blk
;
943 struct signatured_type
*signatured_type
;
948 /* This data structure holds a complete die structure. */
951 /* DWARF-2 tag for this DIE. */
952 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
954 /* Number of attributes */
955 unsigned char num_attrs
;
957 /* True if we're presently building the full type name for the
958 type derived from this DIE. */
959 unsigned char building_fullname
: 1;
964 /* Offset in .debug_info or .debug_types section. */
967 /* The dies in a compilation unit form an n-ary tree. PARENT
968 points to this die's parent; CHILD points to the first child of
969 this node; and all the children of a given node are chained
970 together via their SIBLING fields. */
971 struct die_info
*child
; /* Its first child, if any. */
972 struct die_info
*sibling
; /* Its next sibling, if any. */
973 struct die_info
*parent
; /* Its parent, if any. */
975 /* An array of attributes, with NUM_ATTRS elements. There may be
976 zero, but it's not common and zero-sized arrays are not
977 sufficiently portable C. */
978 struct attribute attrs
[1];
981 /* Get at parts of an attribute structure. */
983 #define DW_STRING(attr) ((attr)->u.str)
984 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
985 #define DW_UNSND(attr) ((attr)->u.unsnd)
986 #define DW_BLOCK(attr) ((attr)->u.blk)
987 #define DW_SND(attr) ((attr)->u.snd)
988 #define DW_ADDR(attr) ((attr)->u.addr)
989 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
991 /* Blocks are a bunch of untyped bytes. */
996 /* Valid only if SIZE is not zero. */
1000 #ifndef ATTR_ALLOC_CHUNK
1001 #define ATTR_ALLOC_CHUNK 4
1004 /* Allocate fields for structs, unions and enums in this size. */
1005 #ifndef DW_FIELD_ALLOC_CHUNK
1006 #define DW_FIELD_ALLOC_CHUNK 4
1009 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1010 but this would require a corresponding change in unpack_field_as_long
1012 static int bits_per_byte
= 8;
1014 /* The routines that read and process dies for a C struct or C++ class
1015 pass lists of data member fields and lists of member function fields
1016 in an instance of a field_info structure, as defined below. */
1019 /* List of data member and baseclasses fields. */
1022 struct nextfield
*next
;
1027 *fields
, *baseclasses
;
1029 /* Number of fields (including baseclasses). */
1032 /* Number of baseclasses. */
1035 /* Set if the accesibility of one of the fields is not public. */
1036 int non_public_fields
;
1038 /* Member function fields array, entries are allocated in the order they
1039 are encountered in the object file. */
1042 struct nextfnfield
*next
;
1043 struct fn_field fnfield
;
1047 /* Member function fieldlist array, contains name of possibly overloaded
1048 member function, number of overloaded member functions and a pointer
1049 to the head of the member function field chain. */
1054 struct nextfnfield
*head
;
1058 /* Number of entries in the fnfieldlists array. */
1061 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1062 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1063 struct typedef_field_list
1065 struct typedef_field field
;
1066 struct typedef_field_list
*next
;
1068 *typedef_field_list
;
1069 unsigned typedef_field_list_count
;
1072 /* One item on the queue of compilation units to read in full symbols
1074 struct dwarf2_queue_item
1076 struct dwarf2_per_cu_data
*per_cu
;
1077 enum language pretend_language
;
1078 struct dwarf2_queue_item
*next
;
1081 /* The current queue. */
1082 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1084 /* Loaded secondary compilation units are kept in memory until they
1085 have not been referenced for the processing of this many
1086 compilation units. Set this to zero to disable caching. Cache
1087 sizes of up to at least twenty will improve startup time for
1088 typical inter-CU-reference binaries, at an obvious memory cost. */
1089 static int dwarf2_max_cache_age
= 5;
1091 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
1092 struct cmd_list_element
*c
, const char *value
)
1094 fprintf_filtered (file
, _("The upper bound on the age of cached "
1095 "dwarf2 compilation units is %s.\n"),
1100 /* Various complaints about symbol reading that don't abort the process. */
1103 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1105 complaint (&symfile_complaints
,
1106 _("statement list doesn't fit in .debug_line section"));
1110 dwarf2_debug_line_missing_file_complaint (void)
1112 complaint (&symfile_complaints
,
1113 _(".debug_line section has line data without a file"));
1117 dwarf2_debug_line_missing_end_sequence_complaint (void)
1119 complaint (&symfile_complaints
,
1120 _(".debug_line section has line "
1121 "program sequence without an end"));
1125 dwarf2_complex_location_expr_complaint (void)
1127 complaint (&symfile_complaints
, _("location expression too complex"));
1131 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1134 complaint (&symfile_complaints
,
1135 _("const value length mismatch for '%s', got %d, expected %d"),
1140 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
1142 complaint (&symfile_complaints
,
1143 _("debug info runs off end of %s section"
1145 section
->asection
->name
,
1146 bfd_get_filename (section
->asection
->owner
));
1150 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
1152 complaint (&symfile_complaints
,
1153 _("macro debug info contains a "
1154 "malformed macro definition:\n`%s'"),
1159 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1161 complaint (&symfile_complaints
,
1162 _("invalid attribute class or form for '%s' in '%s'"),
1166 /* local function prototypes */
1168 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
1170 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
1173 static void dwarf2_find_base_address (struct die_info
*die
,
1174 struct dwarf2_cu
*cu
);
1176 static void dwarf2_build_psymtabs_hard (struct objfile
*);
1178 static void scan_partial_symbols (struct partial_die_info
*,
1179 CORE_ADDR
*, CORE_ADDR
*,
1180 int, struct dwarf2_cu
*);
1182 static void add_partial_symbol (struct partial_die_info
*,
1183 struct dwarf2_cu
*);
1185 static void add_partial_namespace (struct partial_die_info
*pdi
,
1186 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1187 int need_pc
, struct dwarf2_cu
*cu
);
1189 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1190 CORE_ADDR
*highpc
, int need_pc
,
1191 struct dwarf2_cu
*cu
);
1193 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1194 struct dwarf2_cu
*cu
);
1196 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1197 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1198 int need_pc
, struct dwarf2_cu
*cu
);
1200 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
1202 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1204 static struct abbrev_info
*abbrev_table_lookup_abbrev
1205 (const struct abbrev_table
*, unsigned int);
1207 static struct abbrev_table
*abbrev_table_read_table
1208 (struct dwarf2_section_info
*, sect_offset
);
1210 static void abbrev_table_free (struct abbrev_table
*);
1212 static void abbrev_table_free_cleanup (void *);
1214 static void dwarf2_read_abbrevs (struct dwarf2_cu
*,
1215 struct dwarf2_section_info
*);
1217 static void dwarf2_free_abbrev_table (void *);
1219 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
1221 static struct partial_die_info
*load_partial_dies
1222 (const struct die_reader_specs
*, gdb_byte
*, int);
1224 static gdb_byte
*read_partial_die (const struct die_reader_specs
*,
1225 struct partial_die_info
*,
1226 struct abbrev_info
*,
1230 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1231 struct dwarf2_cu
*);
1233 static void fixup_partial_die (struct partial_die_info
*,
1234 struct dwarf2_cu
*);
1236 static gdb_byte
*read_attribute (const struct die_reader_specs
*,
1237 struct attribute
*, struct attr_abbrev
*,
1240 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
1242 static int read_1_signed_byte (bfd
*, gdb_byte
*);
1244 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
1246 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
1248 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
1250 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
1253 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
1255 static LONGEST read_checked_initial_length_and_offset
1256 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1257 unsigned int *, unsigned int *);
1259 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
1262 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
1264 static sect_offset
read_abbrev_offset (struct dwarf2_section_info
*,
1267 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
1269 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
1271 static char *read_indirect_string (bfd
*, gdb_byte
*,
1272 const struct comp_unit_head
*,
1275 static char *read_indirect_string_from_dwz (struct dwz_file
*, LONGEST
);
1277 static ULONGEST
read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1279 static LONGEST
read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
1281 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*, gdb_byte
*,
1284 static char *read_str_index (const struct die_reader_specs
*reader
,
1285 struct dwarf2_cu
*cu
, ULONGEST str_index
);
1287 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1289 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1290 struct dwarf2_cu
*);
1292 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1295 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1296 struct dwarf2_cu
*cu
);
1298 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1300 static struct die_info
*die_specification (struct die_info
*die
,
1301 struct dwarf2_cu
**);
1303 static void free_line_header (struct line_header
*lh
);
1305 static void add_file_name (struct line_header
*, char *, unsigned int,
1306 unsigned int, unsigned int);
1308 static struct line_header
*dwarf_decode_line_header (unsigned int offset
,
1309 struct dwarf2_cu
*cu
);
1311 static void dwarf_decode_lines (struct line_header
*, const char *,
1312 struct dwarf2_cu
*, struct partial_symtab
*,
1315 static void dwarf2_start_subfile (char *, const char *, const char *);
1317 static void dwarf2_start_symtab (struct dwarf2_cu
*,
1318 char *, char *, CORE_ADDR
);
1320 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1321 struct dwarf2_cu
*);
1323 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1324 struct dwarf2_cu
*, struct symbol
*);
1326 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1327 struct dwarf2_cu
*);
1329 static void dwarf2_const_value_attr (struct attribute
*attr
,
1332 struct obstack
*obstack
,
1333 struct dwarf2_cu
*cu
, LONGEST
*value
,
1335 struct dwarf2_locexpr_baton
**baton
);
1337 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1339 static int need_gnat_info (struct dwarf2_cu
*);
1341 static struct type
*die_descriptive_type (struct die_info
*,
1342 struct dwarf2_cu
*);
1344 static void set_descriptive_type (struct type
*, struct die_info
*,
1345 struct dwarf2_cu
*);
1347 static struct type
*die_containing_type (struct die_info
*,
1348 struct dwarf2_cu
*);
1350 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1351 struct dwarf2_cu
*);
1353 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1355 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1357 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1359 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1360 const char *suffix
, int physname
,
1361 struct dwarf2_cu
*cu
);
1363 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1365 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1367 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1369 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1371 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1373 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1374 struct dwarf2_cu
*, struct partial_symtab
*);
1376 static int dwarf2_get_pc_bounds (struct die_info
*,
1377 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1378 struct partial_symtab
*);
1380 static void get_scope_pc_bounds (struct die_info
*,
1381 CORE_ADDR
*, CORE_ADDR
*,
1382 struct dwarf2_cu
*);
1384 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1385 CORE_ADDR
, struct dwarf2_cu
*);
1387 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1388 struct dwarf2_cu
*);
1390 static void dwarf2_attach_fields_to_type (struct field_info
*,
1391 struct type
*, struct dwarf2_cu
*);
1393 static void dwarf2_add_member_fn (struct field_info
*,
1394 struct die_info
*, struct type
*,
1395 struct dwarf2_cu
*);
1397 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1399 struct dwarf2_cu
*);
1401 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1403 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1405 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1407 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1409 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1411 static struct type
*read_module_type (struct die_info
*die
,
1412 struct dwarf2_cu
*cu
);
1414 static const char *namespace_name (struct die_info
*die
,
1415 int *is_anonymous
, struct dwarf2_cu
*);
1417 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1419 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1421 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1422 struct dwarf2_cu
*);
1424 static struct die_info
*read_die_and_children (const struct die_reader_specs
*,
1426 gdb_byte
**new_info_ptr
,
1427 struct die_info
*parent
);
1429 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1431 gdb_byte
**new_info_ptr
,
1432 struct die_info
*parent
);
1434 static gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1435 struct die_info
**, gdb_byte
*, int *, int);
1437 static gdb_byte
*read_full_die (const struct die_reader_specs
*,
1438 struct die_info
**, gdb_byte
*, int *);
1440 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1442 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1445 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1447 static const char *dwarf2_full_name (char *name
,
1448 struct die_info
*die
,
1449 struct dwarf2_cu
*cu
);
1451 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1452 struct dwarf2_cu
**);
1454 static const char *dwarf_tag_name (unsigned int);
1456 static const char *dwarf_attr_name (unsigned int);
1458 static const char *dwarf_form_name (unsigned int);
1460 static char *dwarf_bool_name (unsigned int);
1462 static const char *dwarf_type_encoding_name (unsigned int);
1464 static struct die_info
*sibling_die (struct die_info
*);
1466 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1468 static void dump_die_for_error (struct die_info
*);
1470 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1473 /*static*/ void dump_die (struct die_info
*, int max_level
);
1475 static void store_in_ref_table (struct die_info
*,
1476 struct dwarf2_cu
*);
1478 static int is_ref_attr (struct attribute
*);
1480 static sect_offset
dwarf2_get_ref_die_offset (struct attribute
*);
1482 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1484 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1486 struct dwarf2_cu
**);
1488 static struct die_info
*follow_die_ref (struct die_info
*,
1490 struct dwarf2_cu
**);
1492 static struct die_info
*follow_die_sig (struct die_info
*,
1494 struct dwarf2_cu
**);
1496 static struct signatured_type
*lookup_signatured_type_at_offset
1497 (struct objfile
*objfile
,
1498 struct dwarf2_section_info
*section
, sect_offset offset
);
1500 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1502 static void read_signatured_type (struct signatured_type
*);
1504 static struct type_unit_group
*get_type_unit_group
1505 (struct dwarf2_cu
*, struct attribute
*);
1507 static void build_type_unit_groups (die_reader_func_ftype
*, void *);
1509 /* memory allocation interface */
1511 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1513 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1515 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int,
1518 static int attr_form_is_block (struct attribute
*);
1520 static int attr_form_is_section_offset (struct attribute
*);
1522 static int attr_form_is_constant (struct attribute
*);
1524 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1525 struct dwarf2_loclist_baton
*baton
,
1526 struct attribute
*attr
);
1528 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1530 struct dwarf2_cu
*cu
);
1532 static gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1534 struct abbrev_info
*abbrev
);
1536 static void free_stack_comp_unit (void *);
1538 static hashval_t
partial_die_hash (const void *item
);
1540 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1542 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1543 (sect_offset offset
, unsigned int offset_in_dwz
, struct objfile
*objfile
);
1545 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1546 struct dwarf2_per_cu_data
*per_cu
);
1548 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1549 struct die_info
*comp_unit_die
,
1550 enum language pretend_language
);
1552 static void free_heap_comp_unit (void *);
1554 static void free_cached_comp_units (void *);
1556 static void age_cached_comp_units (void);
1558 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1560 static struct type
*set_die_type (struct die_info
*, struct type
*,
1561 struct dwarf2_cu
*);
1563 static void create_all_comp_units (struct objfile
*);
1565 static int create_all_type_units (struct objfile
*);
1567 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1570 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1573 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1576 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1577 struct dwarf2_per_cu_data
*);
1579 static void dwarf2_mark (struct dwarf2_cu
*);
1581 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1583 static struct type
*get_die_type_at_offset (sect_offset
,
1584 struct dwarf2_per_cu_data
*per_cu
);
1586 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1588 static void dwarf2_release_queue (void *dummy
);
1590 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1591 enum language pretend_language
);
1593 static int maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
1594 struct dwarf2_per_cu_data
*per_cu
,
1595 enum language pretend_language
);
1597 static void process_queue (void);
1599 static void find_file_and_directory (struct die_info
*die
,
1600 struct dwarf2_cu
*cu
,
1601 char **name
, char **comp_dir
);
1603 static char *file_full_name (int file
, struct line_header
*lh
,
1604 const char *comp_dir
);
1606 static gdb_byte
*read_and_check_comp_unit_head
1607 (struct comp_unit_head
*header
,
1608 struct dwarf2_section_info
*section
,
1609 struct dwarf2_section_info
*abbrev_section
, gdb_byte
*info_ptr
,
1610 int is_debug_types_section
);
1612 static void init_cutu_and_read_dies
1613 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1614 int use_existing_cu
, int keep
,
1615 die_reader_func_ftype
*die_reader_func
, void *data
);
1617 static void init_cutu_and_read_dies_simple
1618 (struct dwarf2_per_cu_data
*this_cu
,
1619 die_reader_func_ftype
*die_reader_func
, void *data
);
1621 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1623 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1625 static struct dwo_unit
*lookup_dwo_comp_unit
1626 (struct dwarf2_per_cu_data
*, char *, const char *, ULONGEST
);
1628 static struct dwo_unit
*lookup_dwo_type_unit
1629 (struct signatured_type
*, char *, const char *);
1631 static void free_dwo_file_cleanup (void *);
1633 static void process_cu_includes (void);
1637 /* Convert VALUE between big- and little-endian. */
1639 byte_swap (offset_type value
)
1643 result
= (value
& 0xff) << 24;
1644 result
|= (value
& 0xff00) << 8;
1645 result
|= (value
& 0xff0000) >> 8;
1646 result
|= (value
& 0xff000000) >> 24;
1650 #define MAYBE_SWAP(V) byte_swap (V)
1653 #define MAYBE_SWAP(V) (V)
1654 #endif /* WORDS_BIGENDIAN */
1656 /* The suffix for an index file. */
1657 #define INDEX_SUFFIX ".gdb-index"
1659 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1660 struct dwarf2_cu
*cu
);
1662 /* Try to locate the sections we need for DWARF 2 debugging
1663 information and return true if we have enough to do something.
1664 NAMES points to the dwarf2 section names, or is NULL if the standard
1665 ELF names are used. */
1668 dwarf2_has_info (struct objfile
*objfile
,
1669 const struct dwarf2_debug_sections
*names
)
1671 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1672 if (!dwarf2_per_objfile
)
1674 /* Initialize per-objfile state. */
1675 struct dwarf2_per_objfile
*data
1676 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1678 memset (data
, 0, sizeof (*data
));
1679 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1680 dwarf2_per_objfile
= data
;
1682 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1684 dwarf2_per_objfile
->objfile
= objfile
;
1686 return (dwarf2_per_objfile
->info
.asection
!= NULL
1687 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1690 /* When loading sections, we look either for uncompressed section or for
1691 compressed section names. */
1694 section_is_p (const char *section_name
,
1695 const struct dwarf2_section_names
*names
)
1697 if (names
->normal
!= NULL
1698 && strcmp (section_name
, names
->normal
) == 0)
1700 if (names
->compressed
!= NULL
1701 && strcmp (section_name
, names
->compressed
) == 0)
1706 /* This function is mapped across the sections and remembers the
1707 offset and size of each of the debugging sections we are interested
1711 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1713 const struct dwarf2_debug_sections
*names
;
1714 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
1717 names
= &dwarf2_elf_names
;
1719 names
= (const struct dwarf2_debug_sections
*) vnames
;
1721 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1724 else if (section_is_p (sectp
->name
, &names
->info
))
1726 dwarf2_per_objfile
->info
.asection
= sectp
;
1727 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1729 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1731 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1732 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1734 else if (section_is_p (sectp
->name
, &names
->line
))
1736 dwarf2_per_objfile
->line
.asection
= sectp
;
1737 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1739 else if (section_is_p (sectp
->name
, &names
->loc
))
1741 dwarf2_per_objfile
->loc
.asection
= sectp
;
1742 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1744 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1746 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1747 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1749 else if (section_is_p (sectp
->name
, &names
->macro
))
1751 dwarf2_per_objfile
->macro
.asection
= sectp
;
1752 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1754 else if (section_is_p (sectp
->name
, &names
->str
))
1756 dwarf2_per_objfile
->str
.asection
= sectp
;
1757 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1759 else if (section_is_p (sectp
->name
, &names
->addr
))
1761 dwarf2_per_objfile
->addr
.asection
= sectp
;
1762 dwarf2_per_objfile
->addr
.size
= bfd_get_section_size (sectp
);
1764 else if (section_is_p (sectp
->name
, &names
->frame
))
1766 dwarf2_per_objfile
->frame
.asection
= sectp
;
1767 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1769 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1771 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1772 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1774 else if (section_is_p (sectp
->name
, &names
->ranges
))
1776 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1777 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1779 else if (section_is_p (sectp
->name
, &names
->types
))
1781 struct dwarf2_section_info type_section
;
1783 memset (&type_section
, 0, sizeof (type_section
));
1784 type_section
.asection
= sectp
;
1785 type_section
.size
= bfd_get_section_size (sectp
);
1787 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1790 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1792 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1793 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1796 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1797 && bfd_section_vma (abfd
, sectp
) == 0)
1798 dwarf2_per_objfile
->has_section_at_zero
= 1;
1801 /* A helper function that decides whether a section is empty,
1805 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1807 return info
->asection
== NULL
|| info
->size
== 0;
1810 /* Read the contents of the section INFO.
1811 OBJFILE is the main object file, but not necessarily the file where
1812 the section comes from. E.g., for DWO files INFO->asection->owner
1813 is the bfd of the DWO file.
1814 If the section is compressed, uncompress it before returning. */
1817 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1819 asection
*sectp
= info
->asection
;
1821 gdb_byte
*buf
, *retbuf
;
1822 unsigned char header
[4];
1826 info
->buffer
= NULL
;
1829 if (dwarf2_section_empty_p (info
))
1832 abfd
= sectp
->owner
;
1834 /* If the section has relocations, we must read it ourselves.
1835 Otherwise we attach it to the BFD. */
1836 if ((sectp
->flags
& SEC_RELOC
) == 0)
1838 const gdb_byte
*bytes
= gdb_bfd_map_section (sectp
, &info
->size
);
1840 /* We have to cast away const here for historical reasons.
1841 Fixing dwarf2read to be const-correct would be quite nice. */
1842 info
->buffer
= (gdb_byte
*) bytes
;
1846 buf
= obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1849 /* When debugging .o files, we may need to apply relocations; see
1850 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1851 We never compress sections in .o files, so we only need to
1852 try this when the section is not compressed. */
1853 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1856 info
->buffer
= retbuf
;
1860 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1861 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1862 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1863 bfd_get_filename (abfd
));
1866 /* A helper function that returns the size of a section in a safe way.
1867 If you are positive that the section has been read before using the
1868 size, then it is safe to refer to the dwarf2_section_info object's
1869 "size" field directly. In other cases, you must call this
1870 function, because for compressed sections the size field is not set
1871 correctly until the section has been read. */
1873 static bfd_size_type
1874 dwarf2_section_size (struct objfile
*objfile
,
1875 struct dwarf2_section_info
*info
)
1878 dwarf2_read_section (objfile
, info
);
1882 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1886 dwarf2_get_section_info (struct objfile
*objfile
,
1887 enum dwarf2_section_enum sect
,
1888 asection
**sectp
, gdb_byte
**bufp
,
1889 bfd_size_type
*sizep
)
1891 struct dwarf2_per_objfile
*data
1892 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1893 struct dwarf2_section_info
*info
;
1895 /* We may see an objfile without any DWARF, in which case we just
1906 case DWARF2_DEBUG_FRAME
:
1907 info
= &data
->frame
;
1909 case DWARF2_EH_FRAME
:
1910 info
= &data
->eh_frame
;
1913 gdb_assert_not_reached ("unexpected section");
1916 dwarf2_read_section (objfile
, info
);
1918 *sectp
= info
->asection
;
1919 *bufp
= info
->buffer
;
1920 *sizep
= info
->size
;
1923 /* A helper function to find the sections for a .dwz file. */
1926 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
1928 struct dwz_file
*dwz_file
= arg
;
1930 /* Note that we only support the standard ELF names, because .dwz
1931 is ELF-only (at the time of writing). */
1932 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
1934 dwz_file
->abbrev
.asection
= sectp
;
1935 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
1937 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
1939 dwz_file
->info
.asection
= sectp
;
1940 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
1942 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
1944 dwz_file
->str
.asection
= sectp
;
1945 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
1947 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
1949 dwz_file
->line
.asection
= sectp
;
1950 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
1952 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
1954 dwz_file
->macro
.asection
= sectp
;
1955 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
1957 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
1959 dwz_file
->gdb_index
.asection
= sectp
;
1960 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
1964 /* Open the separate '.dwz' debug file, if needed. Error if the file
1967 static struct dwz_file
*
1968 dwarf2_get_dwz_file (void)
1970 bfd
*abfd
, *dwz_bfd
;
1973 struct cleanup
*cleanup
;
1974 const char *filename
;
1975 struct dwz_file
*result
;
1977 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
1978 return dwarf2_per_objfile
->dwz_file
;
1980 abfd
= dwarf2_per_objfile
->objfile
->obfd
;
1981 section
= bfd_get_section_by_name (abfd
, ".gnu_debugaltlink");
1982 if (section
== NULL
)
1983 error (_("could not find '.gnu_debugaltlink' section"));
1984 if (!bfd_malloc_and_get_section (abfd
, section
, &data
))
1985 error (_("could not read '.gnu_debugaltlink' section: %s"),
1986 bfd_errmsg (bfd_get_error ()));
1987 cleanup
= make_cleanup (xfree
, data
);
1990 if (!IS_ABSOLUTE_PATH (filename
))
1992 char *abs
= gdb_realpath (dwarf2_per_objfile
->objfile
->name
);
1995 make_cleanup (xfree
, abs
);
1996 abs
= ldirname (abs
);
1997 make_cleanup (xfree
, abs
);
1999 rel
= concat (abs
, SLASH_STRING
, filename
, (char *) NULL
);
2000 make_cleanup (xfree
, rel
);
2004 /* The format is just a NUL-terminated file name, followed by the
2005 build-id. For now, though, we ignore the build-id. */
2006 dwz_bfd
= gdb_bfd_open (filename
, gnutarget
, -1);
2007 if (dwz_bfd
== NULL
)
2008 error (_("could not read '%s': %s"), filename
,
2009 bfd_errmsg (bfd_get_error ()));
2011 if (!bfd_check_format (dwz_bfd
, bfd_object
))
2013 gdb_bfd_unref (dwz_bfd
);
2014 error (_("file '%s' was not usable: %s"), filename
,
2015 bfd_errmsg (bfd_get_error ()));
2018 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2020 result
->dwz_bfd
= dwz_bfd
;
2022 bfd_map_over_sections (dwz_bfd
, locate_dwz_sections
, result
);
2024 do_cleanups (cleanup
);
2029 /* DWARF quick_symbols_functions support. */
2031 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2032 unique line tables, so we maintain a separate table of all .debug_line
2033 derived entries to support the sharing.
2034 All the quick functions need is the list of file names. We discard the
2035 line_header when we're done and don't need to record it here. */
2036 struct quick_file_names
2038 /* The data used to construct the hash key. */
2039 struct stmt_list_hash hash
;
2041 /* The number of entries in file_names, real_names. */
2042 unsigned int num_file_names
;
2044 /* The file names from the line table, after being run through
2046 const char **file_names
;
2048 /* The file names from the line table after being run through
2049 gdb_realpath. These are computed lazily. */
2050 const char **real_names
;
2053 /* When using the index (and thus not using psymtabs), each CU has an
2054 object of this type. This is used to hold information needed by
2055 the various "quick" methods. */
2056 struct dwarf2_per_cu_quick_data
2058 /* The file table. This can be NULL if there was no file table
2059 or it's currently not read in.
2060 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2061 struct quick_file_names
*file_names
;
2063 /* The corresponding symbol table. This is NULL if symbols for this
2064 CU have not yet been read. */
2065 struct symtab
*symtab
;
2067 /* A temporary mark bit used when iterating over all CUs in
2068 expand_symtabs_matching. */
2069 unsigned int mark
: 1;
2071 /* True if we've tried to read the file table and found there isn't one.
2072 There will be no point in trying to read it again next time. */
2073 unsigned int no_file_data
: 1;
2076 /* Utility hash function for a stmt_list_hash. */
2079 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2083 if (stmt_list_hash
->dwo_unit
!= NULL
)
2084 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2085 v
+= stmt_list_hash
->line_offset
.sect_off
;
2089 /* Utility equality function for a stmt_list_hash. */
2092 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2093 const struct stmt_list_hash
*rhs
)
2095 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2097 if (lhs
->dwo_unit
!= NULL
2098 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2101 return lhs
->line_offset
.sect_off
== rhs
->line_offset
.sect_off
;
2104 /* Hash function for a quick_file_names. */
2107 hash_file_name_entry (const void *e
)
2109 const struct quick_file_names
*file_data
= e
;
2111 return hash_stmt_list_entry (&file_data
->hash
);
2114 /* Equality function for a quick_file_names. */
2117 eq_file_name_entry (const void *a
, const void *b
)
2119 const struct quick_file_names
*ea
= a
;
2120 const struct quick_file_names
*eb
= b
;
2122 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2125 /* Delete function for a quick_file_names. */
2128 delete_file_name_entry (void *e
)
2130 struct quick_file_names
*file_data
= e
;
2133 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2135 xfree ((void*) file_data
->file_names
[i
]);
2136 if (file_data
->real_names
)
2137 xfree ((void*) file_data
->real_names
[i
]);
2140 /* The space for the struct itself lives on objfile_obstack,
2141 so we don't free it here. */
2144 /* Create a quick_file_names hash table. */
2147 create_quick_file_names_table (unsigned int nr_initial_entries
)
2149 return htab_create_alloc (nr_initial_entries
,
2150 hash_file_name_entry
, eq_file_name_entry
,
2151 delete_file_name_entry
, xcalloc
, xfree
);
2154 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2155 have to be created afterwards. You should call age_cached_comp_units after
2156 processing PER_CU->CU. dw2_setup must have been already called. */
2159 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2161 if (per_cu
->is_debug_types
)
2162 load_full_type_unit (per_cu
);
2164 load_full_comp_unit (per_cu
, language_minimal
);
2166 gdb_assert (per_cu
->cu
!= NULL
);
2168 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2171 /* Read in the symbols for PER_CU. */
2174 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2176 struct cleanup
*back_to
;
2178 /* Skip type_unit_groups, reading the type units they contain
2179 is handled elsewhere. */
2180 if (IS_TYPE_UNIT_GROUP (per_cu
))
2183 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2185 if (dwarf2_per_objfile
->using_index
2186 ? per_cu
->v
.quick
->symtab
== NULL
2187 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2189 queue_comp_unit (per_cu
, language_minimal
);
2195 /* Age the cache, releasing compilation units that have not
2196 been used recently. */
2197 age_cached_comp_units ();
2199 do_cleanups (back_to
);
2202 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2203 the objfile from which this CU came. Returns the resulting symbol
2206 static struct symtab
*
2207 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2209 gdb_assert (dwarf2_per_objfile
->using_index
);
2210 if (!per_cu
->v
.quick
->symtab
)
2212 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2213 increment_reading_symtab ();
2214 dw2_do_instantiate_symtab (per_cu
);
2215 process_cu_includes ();
2216 do_cleanups (back_to
);
2218 return per_cu
->v
.quick
->symtab
;
2221 /* Return the CU given its index.
2223 This is intended for loops like:
2225 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2226 + dwarf2_per_objfile->n_type_units); ++i)
2228 struct dwarf2_per_cu_data *per_cu = dw2_get_cu (i);
2234 static struct dwarf2_per_cu_data
*
2235 dw2_get_cu (int index
)
2237 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2239 index
-= dwarf2_per_objfile
->n_comp_units
;
2240 gdb_assert (index
< dwarf2_per_objfile
->n_type_units
);
2241 return &dwarf2_per_objfile
->all_type_units
[index
]->per_cu
;
2244 return dwarf2_per_objfile
->all_comp_units
[index
];
2247 /* Return the primary CU given its index.
2248 The difference between this function and dw2_get_cu is in the handling
2249 of type units (TUs). Here we return the type_unit_group object.
2251 This is intended for loops like:
2253 for (i = 0; i < (dwarf2_per_objfile->n_comp_units
2254 + dwarf2_per_objfile->n_type_unit_groups); ++i)
2256 struct dwarf2_per_cu_data *per_cu = dw2_get_primary_cu (i);
2262 static struct dwarf2_per_cu_data
*
2263 dw2_get_primary_cu (int index
)
2265 if (index
>= dwarf2_per_objfile
->n_comp_units
)
2267 index
-= dwarf2_per_objfile
->n_comp_units
;
2268 gdb_assert (index
< dwarf2_per_objfile
->n_type_unit_groups
);
2269 return &dwarf2_per_objfile
->all_type_unit_groups
[index
]->per_cu
;
2272 return dwarf2_per_objfile
->all_comp_units
[index
];
2275 /* A helper function that knows how to read a 64-bit value in a way
2276 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
2280 extract_cu_value (const char *bytes
, ULONGEST
*result
)
2282 if (sizeof (ULONGEST
) < 8)
2286 /* Ignore the upper 4 bytes if they are all zero. */
2287 for (i
= 0; i
< 4; ++i
)
2288 if (bytes
[i
+ 4] != 0)
2291 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
2294 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2298 /* A helper for create_cus_from_index that handles a given list of
2302 create_cus_from_index_list (struct objfile
*objfile
,
2303 const gdb_byte
*cu_list
, offset_type n_elements
,
2304 struct dwarf2_section_info
*section
,
2310 for (i
= 0; i
< n_elements
; i
+= 2)
2312 struct dwarf2_per_cu_data
*the_cu
;
2313 ULONGEST offset
, length
;
2315 if (!extract_cu_value (cu_list
, &offset
)
2316 || !extract_cu_value (cu_list
+ 8, &length
))
2320 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2321 struct dwarf2_per_cu_data
);
2322 the_cu
->offset
.sect_off
= offset
;
2323 the_cu
->length
= length
;
2324 the_cu
->objfile
= objfile
;
2325 the_cu
->info_or_types_section
= section
;
2326 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2327 struct dwarf2_per_cu_quick_data
);
2328 the_cu
->is_dwz
= is_dwz
;
2329 dwarf2_per_objfile
->all_comp_units
[base_offset
+ i
/ 2] = the_cu
;
2335 /* Read the CU list from the mapped index, and use it to create all
2336 the CU objects for this objfile. Return 0 if something went wrong,
2337 1 if everything went ok. */
2340 create_cus_from_index (struct objfile
*objfile
,
2341 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2342 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2344 struct dwz_file
*dwz
;
2346 dwarf2_per_objfile
->n_comp_units
= (cu_list_elements
+ dwz_elements
) / 2;
2347 dwarf2_per_objfile
->all_comp_units
2348 = obstack_alloc (&objfile
->objfile_obstack
,
2349 dwarf2_per_objfile
->n_comp_units
2350 * sizeof (struct dwarf2_per_cu_data
*));
2352 if (!create_cus_from_index_list (objfile
, cu_list
, cu_list_elements
,
2353 &dwarf2_per_objfile
->info
, 0, 0))
2356 if (dwz_elements
== 0)
2359 dwz
= dwarf2_get_dwz_file ();
2360 return create_cus_from_index_list (objfile
, dwz_list
, dwz_elements
,
2361 &dwz
->info
, 1, cu_list_elements
/ 2);
2364 /* Create the signatured type hash table from the index. */
2367 create_signatured_type_table_from_index (struct objfile
*objfile
,
2368 struct dwarf2_section_info
*section
,
2369 const gdb_byte
*bytes
,
2370 offset_type elements
)
2373 htab_t sig_types_hash
;
2375 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
2376 dwarf2_per_objfile
->all_type_units
2377 = obstack_alloc (&objfile
->objfile_obstack
,
2378 dwarf2_per_objfile
->n_type_units
2379 * sizeof (struct signatured_type
*));
2381 sig_types_hash
= allocate_signatured_type_table (objfile
);
2383 for (i
= 0; i
< elements
; i
+= 3)
2385 struct signatured_type
*sig_type
;
2386 ULONGEST offset
, type_offset_in_tu
, signature
;
2389 if (!extract_cu_value (bytes
, &offset
)
2390 || !extract_cu_value (bytes
+ 8, &type_offset_in_tu
))
2392 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2395 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2396 struct signatured_type
);
2397 sig_type
->signature
= signature
;
2398 sig_type
->type_offset_in_tu
.cu_off
= type_offset_in_tu
;
2399 sig_type
->per_cu
.is_debug_types
= 1;
2400 sig_type
->per_cu
.info_or_types_section
= section
;
2401 sig_type
->per_cu
.offset
.sect_off
= offset
;
2402 sig_type
->per_cu
.objfile
= objfile
;
2403 sig_type
->per_cu
.v
.quick
2404 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2405 struct dwarf2_per_cu_quick_data
);
2407 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
2410 dwarf2_per_objfile
->all_type_units
[i
/ 3] = sig_type
;
2413 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
2418 /* Read the address map data from the mapped index, and use it to
2419 populate the objfile's psymtabs_addrmap. */
2422 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
2424 const gdb_byte
*iter
, *end
;
2425 struct obstack temp_obstack
;
2426 struct addrmap
*mutable_map
;
2427 struct cleanup
*cleanup
;
2430 obstack_init (&temp_obstack
);
2431 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
2432 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2434 iter
= index
->address_table
;
2435 end
= iter
+ index
->address_table_size
;
2437 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2441 ULONGEST hi
, lo
, cu_index
;
2442 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2444 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2446 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2449 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
2450 dw2_get_cu (cu_index
));
2453 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
2454 &objfile
->objfile_obstack
);
2455 do_cleanups (cleanup
);
2458 /* The hash function for strings in the mapped index. This is the same as
2459 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
2460 implementation. This is necessary because the hash function is tied to the
2461 format of the mapped index file. The hash values do not have to match with
2464 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
2467 mapped_index_string_hash (int index_version
, const void *p
)
2469 const unsigned char *str
= (const unsigned char *) p
;
2473 while ((c
= *str
++) != 0)
2475 if (index_version
>= 5)
2477 r
= r
* 67 + c
- 113;
2483 /* Find a slot in the mapped index INDEX for the object named NAME.
2484 If NAME is found, set *VEC_OUT to point to the CU vector in the
2485 constant pool and return 1. If NAME cannot be found, return 0. */
2488 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2489 offset_type
**vec_out
)
2491 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2493 offset_type slot
, step
;
2494 int (*cmp
) (const char *, const char *);
2496 if (current_language
->la_language
== language_cplus
2497 || current_language
->la_language
== language_java
2498 || current_language
->la_language
== language_fortran
)
2500 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2502 const char *paren
= strchr (name
, '(');
2508 dup
= xmalloc (paren
- name
+ 1);
2509 memcpy (dup
, name
, paren
- name
);
2510 dup
[paren
- name
] = 0;
2512 make_cleanup (xfree
, dup
);
2517 /* Index version 4 did not support case insensitive searches. But the
2518 indices for case insensitive languages are built in lowercase, therefore
2519 simulate our NAME being searched is also lowercased. */
2520 hash
= mapped_index_string_hash ((index
->version
== 4
2521 && case_sensitivity
== case_sensitive_off
2522 ? 5 : index
->version
),
2525 slot
= hash
& (index
->symbol_table_slots
- 1);
2526 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2527 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2531 /* Convert a slot number to an offset into the table. */
2532 offset_type i
= 2 * slot
;
2534 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2536 do_cleanups (back_to
);
2540 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2541 if (!cmp (name
, str
))
2543 *vec_out
= (offset_type
*) (index
->constant_pool
2544 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2545 do_cleanups (back_to
);
2549 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2553 /* A helper function that reads the .gdb_index from SECTION and fills
2554 in MAP. FILENAME is the name of the file containing the section;
2555 it is used for error reporting. DEPRECATED_OK is nonzero if it is
2556 ok to use deprecated sections.
2558 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2559 out parameters that are filled in with information about the CU and
2560 TU lists in the section.
2562 Returns 1 if all went well, 0 otherwise. */
2565 read_index_from_section (struct objfile
*objfile
,
2566 const char *filename
,
2568 struct dwarf2_section_info
*section
,
2569 struct mapped_index
*map
,
2570 const gdb_byte
**cu_list
,
2571 offset_type
*cu_list_elements
,
2572 const gdb_byte
**types_list
,
2573 offset_type
*types_list_elements
)
2576 offset_type version
;
2577 offset_type
*metadata
;
2580 if (dwarf2_section_empty_p (section
))
2583 /* Older elfutils strip versions could keep the section in the main
2584 executable while splitting it for the separate debug info file. */
2585 if ((bfd_get_file_flags (section
->asection
) & SEC_HAS_CONTENTS
) == 0)
2588 dwarf2_read_section (objfile
, section
);
2590 addr
= section
->buffer
;
2591 /* Version check. */
2592 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2593 /* Versions earlier than 3 emitted every copy of a psymbol. This
2594 causes the index to behave very poorly for certain requests. Version 3
2595 contained incomplete addrmap. So, it seems better to just ignore such
2599 static int warning_printed
= 0;
2600 if (!warning_printed
)
2602 warning (_("Skipping obsolete .gdb_index section in %s."),
2604 warning_printed
= 1;
2608 /* Index version 4 uses a different hash function than index version
2611 Versions earlier than 6 did not emit psymbols for inlined
2612 functions. Using these files will cause GDB not to be able to
2613 set breakpoints on inlined functions by name, so we ignore these
2614 indices unless the user has done
2615 "set use-deprecated-index-sections on". */
2616 if (version
< 6 && !deprecated_ok
)
2618 static int warning_printed
= 0;
2619 if (!warning_printed
)
2622 Skipping deprecated .gdb_index section in %s.\n\
2623 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2624 to use the section anyway."),
2626 warning_printed
= 1;
2630 /* Indexes with higher version than the one supported by GDB may be no
2631 longer backward compatible. */
2635 map
->version
= version
;
2636 map
->total_size
= section
->size
;
2638 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2641 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2642 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2646 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2647 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2648 - MAYBE_SWAP (metadata
[i
]))
2652 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2653 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2654 - MAYBE_SWAP (metadata
[i
]));
2657 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2658 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2659 - MAYBE_SWAP (metadata
[i
]))
2660 / (2 * sizeof (offset_type
)));
2663 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2669 /* Read the index file. If everything went ok, initialize the "quick"
2670 elements of all the CUs and return 1. Otherwise, return 0. */
2673 dwarf2_read_index (struct objfile
*objfile
)
2675 struct mapped_index local_map
, *map
;
2676 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
2677 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
2679 if (!read_index_from_section (objfile
, objfile
->name
,
2680 use_deprecated_index_sections
,
2681 &dwarf2_per_objfile
->gdb_index
, &local_map
,
2682 &cu_list
, &cu_list_elements
,
2683 &types_list
, &types_list_elements
))
2686 /* Don't use the index if it's empty. */
2687 if (local_map
.symbol_table_slots
== 0)
2690 /* If there is a .dwz file, read it so we can get its CU list as
2692 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
2694 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
2695 struct mapped_index dwz_map
;
2696 const gdb_byte
*dwz_types_ignore
;
2697 offset_type dwz_types_elements_ignore
;
2699 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
2701 &dwz
->gdb_index
, &dwz_map
,
2702 &dwz_list
, &dwz_list_elements
,
2704 &dwz_types_elements_ignore
))
2706 warning (_("could not read '.gdb_index' section from %s; skipping"),
2707 bfd_get_filename (dwz
->dwz_bfd
));
2712 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
,
2713 dwz_list
, dwz_list_elements
))
2716 if (types_list_elements
)
2718 struct dwarf2_section_info
*section
;
2720 /* We can only handle a single .debug_types when we have an
2722 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2725 section
= VEC_index (dwarf2_section_info_def
,
2726 dwarf2_per_objfile
->types
, 0);
2728 if (!create_signatured_type_table_from_index (objfile
, section
,
2730 types_list_elements
))
2734 create_addrmap_from_index (objfile
, &local_map
);
2736 map
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct mapped_index
));
2739 dwarf2_per_objfile
->index_table
= map
;
2740 dwarf2_per_objfile
->using_index
= 1;
2741 dwarf2_per_objfile
->quick_file_names_table
=
2742 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2747 /* A helper for the "quick" functions which sets the global
2748 dwarf2_per_objfile according to OBJFILE. */
2751 dw2_setup (struct objfile
*objfile
)
2753 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2754 gdb_assert (dwarf2_per_objfile
);
2757 /* Reader function for dw2_build_type_unit_groups. */
2760 dw2_build_type_unit_groups_reader (const struct die_reader_specs
*reader
,
2762 struct die_info
*type_unit_die
,
2766 struct dwarf2_cu
*cu
= reader
->cu
;
2767 struct attribute
*attr
;
2768 struct type_unit_group
*tu_group
;
2770 gdb_assert (data
== NULL
);
2775 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
2776 /* Call this for its side-effect of creating the associated
2777 struct type_unit_group if it doesn't already exist. */
2778 tu_group
= get_type_unit_group (cu
, attr
);
2781 /* Build dwarf2_per_objfile->type_unit_groups.
2782 This function may be called multiple times. */
2785 dw2_build_type_unit_groups (void)
2787 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
2788 build_type_unit_groups (dw2_build_type_unit_groups_reader
, NULL
);
2791 /* die_reader_func for dw2_get_file_names. */
2794 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
2796 struct die_info
*comp_unit_die
,
2800 struct dwarf2_cu
*cu
= reader
->cu
;
2801 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
2802 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2803 struct dwarf2_per_cu_data
*lh_cu
;
2804 struct line_header
*lh
;
2805 struct attribute
*attr
;
2807 char *name
, *comp_dir
;
2809 struct quick_file_names
*qfn
;
2810 unsigned int line_offset
;
2812 /* Our callers never want to match partial units -- instead they
2813 will match the enclosing full CU. */
2814 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
2816 this_cu
->v
.quick
->no_file_data
= 1;
2820 /* If we're reading the line header for TUs, store it in the "per_cu"
2822 if (this_cu
->is_debug_types
)
2824 struct type_unit_group
*tu_group
= data
;
2826 gdb_assert (tu_group
!= NULL
);
2827 lh_cu
= &tu_group
->per_cu
;
2836 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
2839 struct quick_file_names find_entry
;
2841 line_offset
= DW_UNSND (attr
);
2843 /* We may have already read in this line header (TU line header sharing).
2844 If we have we're done. */
2845 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
2846 find_entry
.hash
.line_offset
.sect_off
= line_offset
;
2847 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2848 &find_entry
, INSERT
);
2851 lh_cu
->v
.quick
->file_names
= *slot
;
2855 lh
= dwarf_decode_line_header (line_offset
, cu
);
2859 lh_cu
->v
.quick
->no_file_data
= 1;
2863 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2864 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
2865 qfn
->hash
.line_offset
.sect_off
= line_offset
;
2866 gdb_assert (slot
!= NULL
);
2869 find_file_and_directory (comp_unit_die
, cu
, &name
, &comp_dir
);
2871 qfn
->num_file_names
= lh
->num_file_names
;
2872 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2873 lh
->num_file_names
* sizeof (char *));
2874 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2875 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2876 qfn
->real_names
= NULL
;
2878 free_line_header (lh
);
2880 lh_cu
->v
.quick
->file_names
= qfn
;
2883 /* A helper for the "quick" functions which attempts to read the line
2884 table for THIS_CU. */
2886 static struct quick_file_names
*
2887 dw2_get_file_names (struct objfile
*objfile
,
2888 struct dwarf2_per_cu_data
*this_cu
)
2890 /* For TUs this should only be called on the parent group. */
2891 if (this_cu
->is_debug_types
)
2892 gdb_assert (IS_TYPE_UNIT_GROUP (this_cu
));
2894 if (this_cu
->v
.quick
->file_names
!= NULL
)
2895 return this_cu
->v
.quick
->file_names
;
2896 /* If we know there is no line data, no point in looking again. */
2897 if (this_cu
->v
.quick
->no_file_data
)
2900 /* If DWO files are in use, we can still find the DW_AT_stmt_list attribute
2901 in the stub for CUs, there's is no need to lookup the DWO file.
2902 However, that's not the case for TUs where DW_AT_stmt_list lives in the
2904 if (this_cu
->is_debug_types
)
2906 struct type_unit_group
*tu_group
= this_cu
->s
.type_unit_group
;
2908 init_cutu_and_read_dies (tu_group
->t
.first_tu
, NULL
, 0, 0,
2909 dw2_get_file_names_reader
, tu_group
);
2912 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
2914 if (this_cu
->v
.quick
->no_file_data
)
2916 return this_cu
->v
.quick
->file_names
;
2919 /* A helper for the "quick" functions which computes and caches the
2920 real path for a given file name from the line table. */
2923 dw2_get_real_path (struct objfile
*objfile
,
2924 struct quick_file_names
*qfn
, int index
)
2926 if (qfn
->real_names
== NULL
)
2927 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2928 qfn
->num_file_names
, sizeof (char *));
2930 if (qfn
->real_names
[index
] == NULL
)
2931 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2933 return qfn
->real_names
[index
];
2936 static struct symtab
*
2937 dw2_find_last_source_symtab (struct objfile
*objfile
)
2941 dw2_setup (objfile
);
2942 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2943 return dw2_instantiate_symtab (dw2_get_cu (index
));
2946 /* Traversal function for dw2_forget_cached_source_info. */
2949 dw2_free_cached_file_names (void **slot
, void *info
)
2951 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2953 if (file_data
->real_names
)
2957 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2959 xfree ((void*) file_data
->real_names
[i
]);
2960 file_data
->real_names
[i
] = NULL
;
2968 dw2_forget_cached_source_info (struct objfile
*objfile
)
2970 dw2_setup (objfile
);
2972 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2973 dw2_free_cached_file_names
, NULL
);
2976 /* Helper function for dw2_map_symtabs_matching_filename that expands
2977 the symtabs and calls the iterator. */
2980 dw2_map_expand_apply (struct objfile
*objfile
,
2981 struct dwarf2_per_cu_data
*per_cu
,
2983 const char *full_path
, const char *real_path
,
2984 int (*callback
) (struct symtab
*, void *),
2987 struct symtab
*last_made
= objfile
->symtabs
;
2989 /* Don't visit already-expanded CUs. */
2990 if (per_cu
->v
.quick
->symtab
)
2993 /* This may expand more than one symtab, and we want to iterate over
2995 dw2_instantiate_symtab (per_cu
);
2997 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
2998 objfile
->symtabs
, last_made
);
3001 /* Implementation of the map_symtabs_matching_filename method. */
3004 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
3005 const char *full_path
, const char *real_path
,
3006 int (*callback
) (struct symtab
*, void *),
3010 const char *name_basename
= lbasename (name
);
3011 int name_len
= strlen (name
);
3012 int is_abs
= IS_ABSOLUTE_PATH (name
);
3014 dw2_setup (objfile
);
3016 dw2_build_type_unit_groups ();
3018 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3019 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3022 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3023 struct quick_file_names
*file_data
;
3025 /* We only need to look at symtabs not already expanded. */
3026 if (per_cu
->v
.quick
->symtab
)
3029 file_data
= dw2_get_file_names (objfile
, per_cu
);
3030 if (file_data
== NULL
)
3033 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3035 const char *this_name
= file_data
->file_names
[j
];
3037 if (FILENAME_CMP (name
, this_name
) == 0
3038 || (!is_abs
&& compare_filenames_for_search (this_name
,
3041 if (dw2_map_expand_apply (objfile
, per_cu
,
3042 name
, full_path
, real_path
,
3047 /* Before we invoke realpath, which can get expensive when many
3048 files are involved, do a quick comparison of the basenames. */
3049 if (! basenames_may_differ
3050 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3053 if (full_path
!= NULL
)
3055 const char *this_real_name
= dw2_get_real_path (objfile
,
3058 if (this_real_name
!= NULL
3059 && (FILENAME_CMP (full_path
, this_real_name
) == 0
3061 && compare_filenames_for_search (this_real_name
,
3064 if (dw2_map_expand_apply (objfile
, per_cu
,
3065 name
, full_path
, real_path
,
3071 if (real_path
!= NULL
)
3073 const char *this_real_name
= dw2_get_real_path (objfile
,
3076 if (this_real_name
!= NULL
3077 && (FILENAME_CMP (real_path
, this_real_name
) == 0
3079 && compare_filenames_for_search (this_real_name
,
3082 if (dw2_map_expand_apply (objfile
, per_cu
,
3083 name
, full_path
, real_path
,
3094 static struct symtab
*
3095 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
3096 const char *name
, domain_enum domain
)
3098 /* We do all the work in the pre_expand_symtabs_matching hook
3103 /* A helper function that expands all symtabs that hold an object
3104 named NAME. If WANT_SPECIFIC_BLOCK is non-zero, only look for
3105 symbols in block BLOCK_KIND. */
3108 dw2_do_expand_symtabs_matching (struct objfile
*objfile
,
3109 int want_specific_block
,
3110 enum block_enum block_kind
,
3111 const char *name
, domain_enum domain
)
3113 struct mapped_index
*index
;
3115 dw2_setup (objfile
);
3117 index
= dwarf2_per_objfile
->index_table
;
3119 /* index_table is NULL if OBJF_READNOW. */
3124 if (find_slot_in_mapped_hash (index
, name
, &vec
))
3126 offset_type i
, len
= MAYBE_SWAP (*vec
);
3127 for (i
= 0; i
< len
; ++i
)
3129 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[i
+ 1]);
3130 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3131 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
3132 int want_static
= block_kind
!= GLOBAL_BLOCK
;
3133 /* This value is only valid for index versions >= 7. */
3134 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3135 gdb_index_symbol_kind symbol_kind
=
3136 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3137 /* Only check the symbol attributes if they're present.
3138 Indices prior to version 7 don't record them,
3139 and indices >= 7 may elide them for certain symbols
3140 (gold does this). */
3142 (index
->version
>= 7
3143 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3146 && want_specific_block
3147 && want_static
!= is_static
)
3150 /* Only check the symbol's kind if it has one. */
3156 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3157 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3158 /* Some types are also in VAR_DOMAIN. */
3159 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3163 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3167 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3175 dw2_instantiate_symtab (per_cu
);
3182 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
3183 enum block_enum block_kind
, const char *name
,
3186 dw2_do_expand_symtabs_matching (objfile
, 1, block_kind
, name
, domain
);
3190 dw2_print_stats (struct objfile
*objfile
)
3194 dw2_setup (objfile
);
3196 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3197 + dwarf2_per_objfile
->n_type_units
); ++i
)
3199 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3201 if (!per_cu
->v
.quick
->symtab
)
3204 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3208 dw2_dump (struct objfile
*objfile
)
3210 /* Nothing worth printing. */
3214 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
3215 struct section_offsets
*delta
)
3217 /* There's nothing to relocate here. */
3221 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3222 const char *func_name
)
3224 /* Note: It doesn't matter what we pass for block_kind here. */
3225 dw2_do_expand_symtabs_matching (objfile
, 0, GLOBAL_BLOCK
, func_name
,
3230 dw2_expand_all_symtabs (struct objfile
*objfile
)
3234 dw2_setup (objfile
);
3236 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3237 + dwarf2_per_objfile
->n_type_units
); ++i
)
3239 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3241 dw2_instantiate_symtab (per_cu
);
3246 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
3247 const char *filename
)
3251 dw2_setup (objfile
);
3253 /* We don't need to consider type units here.
3254 This is only called for examining code, e.g. expand_line_sal.
3255 There can be an order of magnitude (or more) more type units
3256 than comp units, and we avoid them if we can. */
3258 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3261 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3262 struct quick_file_names
*file_data
;
3264 /* We only need to look at symtabs not already expanded. */
3265 if (per_cu
->v
.quick
->symtab
)
3268 file_data
= dw2_get_file_names (objfile
, per_cu
);
3269 if (file_data
== NULL
)
3272 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3274 const char *this_name
= file_data
->file_names
[j
];
3275 if (FILENAME_CMP (this_name
, filename
) == 0)
3277 dw2_instantiate_symtab (per_cu
);
3284 /* A helper function for dw2_find_symbol_file that finds the primary
3285 file name for a given CU. This is a die_reader_func. */
3288 dw2_get_primary_filename_reader (const struct die_reader_specs
*reader
,
3290 struct die_info
*comp_unit_die
,
3294 const char **result_ptr
= data
;
3295 struct dwarf2_cu
*cu
= reader
->cu
;
3296 struct attribute
*attr
;
3298 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
3302 *result_ptr
= DW_STRING (attr
);
3306 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
3308 struct dwarf2_per_cu_data
*per_cu
;
3310 struct quick_file_names
*file_data
;
3311 const char *filename
;
3313 dw2_setup (objfile
);
3315 /* index_table is NULL if OBJF_READNOW. */
3316 if (!dwarf2_per_objfile
->index_table
)
3320 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
3322 struct blockvector
*bv
= BLOCKVECTOR (s
);
3323 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3324 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
3327 return sym
->symtab
->filename
;
3332 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
3336 /* Note that this just looks at the very first one named NAME -- but
3337 actually we are looking for a function. find_main_filename
3338 should be rewritten so that it doesn't require a custom hook. It
3339 could just use the ordinary symbol tables. */
3340 /* vec[0] is the length, which must always be >0. */
3341 per_cu
= dw2_get_cu (GDB_INDEX_CU_VALUE (MAYBE_SWAP (vec
[1])));
3343 if (per_cu
->v
.quick
->symtab
!= NULL
)
3344 return per_cu
->v
.quick
->symtab
->filename
;
3346 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
3347 dw2_get_primary_filename_reader
, &filename
);
3353 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
3354 struct objfile
*objfile
, int global
,
3355 int (*callback
) (struct block
*,
3356 struct symbol
*, void *),
3357 void *data
, symbol_compare_ftype
*match
,
3358 symbol_compare_ftype
*ordered_compare
)
3360 /* Currently unimplemented; used for Ada. The function can be called if the
3361 current language is Ada for a non-Ada objfile using GNU index. As Ada
3362 does not look for non-Ada symbols this function should just return. */
3366 dw2_expand_symtabs_matching
3367 (struct objfile
*objfile
,
3368 int (*file_matcher
) (const char *, void *),
3369 int (*name_matcher
) (const char *, void *),
3370 enum search_domain kind
,
3375 struct mapped_index
*index
;
3377 dw2_setup (objfile
);
3379 /* index_table is NULL if OBJF_READNOW. */
3380 if (!dwarf2_per_objfile
->index_table
)
3382 index
= dwarf2_per_objfile
->index_table
;
3384 if (file_matcher
!= NULL
)
3386 struct cleanup
*cleanup
;
3387 htab_t visited_found
, visited_not_found
;
3389 dw2_build_type_unit_groups ();
3391 visited_found
= htab_create_alloc (10,
3392 htab_hash_pointer
, htab_eq_pointer
,
3393 NULL
, xcalloc
, xfree
);
3394 cleanup
= make_cleanup_htab_delete (visited_found
);
3395 visited_not_found
= htab_create_alloc (10,
3396 htab_hash_pointer
, htab_eq_pointer
,
3397 NULL
, xcalloc
, xfree
);
3398 make_cleanup_htab_delete (visited_not_found
);
3400 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3401 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3404 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3405 struct quick_file_names
*file_data
;
3408 per_cu
->v
.quick
->mark
= 0;
3410 /* We only need to look at symtabs not already expanded. */
3411 if (per_cu
->v
.quick
->symtab
)
3414 file_data
= dw2_get_file_names (objfile
, per_cu
);
3415 if (file_data
== NULL
)
3418 if (htab_find (visited_not_found
, file_data
) != NULL
)
3420 else if (htab_find (visited_found
, file_data
) != NULL
)
3422 per_cu
->v
.quick
->mark
= 1;
3426 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3428 if (file_matcher (file_data
->file_names
[j
], data
))
3430 per_cu
->v
.quick
->mark
= 1;
3435 slot
= htab_find_slot (per_cu
->v
.quick
->mark
3437 : visited_not_found
,
3442 do_cleanups (cleanup
);
3445 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
3447 offset_type idx
= 2 * iter
;
3449 offset_type
*vec
, vec_len
, vec_idx
;
3451 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
3454 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
3456 if (! (*name_matcher
) (name
, data
))
3459 /* The name was matched, now expand corresponding CUs that were
3461 vec
= (offset_type
*) (index
->constant_pool
3462 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
3463 vec_len
= MAYBE_SWAP (vec
[0]);
3464 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
3466 struct dwarf2_per_cu_data
*per_cu
;
3467 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
3468 gdb_index_symbol_kind symbol_kind
=
3469 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3470 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3472 /* Don't crash on bad data. */
3473 if (cu_index
>= (dwarf2_per_objfile
->n_comp_units
3474 + dwarf2_per_objfile
->n_type_units
))
3477 /* Only check the symbol's kind if it has one.
3478 Indices prior to version 7 don't record it. */
3479 if (index
->version
>= 7)
3483 case VARIABLES_DOMAIN
:
3484 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
3487 case FUNCTIONS_DOMAIN
:
3488 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
3492 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3500 per_cu
= dw2_get_cu (cu_index
);
3501 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
3502 dw2_instantiate_symtab (per_cu
);
3507 /* A helper for dw2_find_pc_sect_symtab which finds the most specific
3510 static struct symtab
*
3511 recursively_find_pc_sect_symtab (struct symtab
*symtab
, CORE_ADDR pc
)
3515 if (BLOCKVECTOR (symtab
) != NULL
3516 && blockvector_contains_pc (BLOCKVECTOR (symtab
), pc
))
3519 if (symtab
->includes
== NULL
)
3522 for (i
= 0; symtab
->includes
[i
]; ++i
)
3524 struct symtab
*s
= symtab
->includes
[i
];
3526 s
= recursively_find_pc_sect_symtab (s
, pc
);
3534 static struct symtab
*
3535 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
3536 struct minimal_symbol
*msymbol
,
3538 struct obj_section
*section
,
3541 struct dwarf2_per_cu_data
*data
;
3542 struct symtab
*result
;
3544 dw2_setup (objfile
);
3546 if (!objfile
->psymtabs_addrmap
)
3549 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
3553 if (warn_if_readin
&& data
->v
.quick
->symtab
)
3554 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
3555 paddress (get_objfile_arch (objfile
), pc
));
3557 result
= recursively_find_pc_sect_symtab (dw2_instantiate_symtab (data
), pc
);
3558 gdb_assert (result
!= NULL
);
3563 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
3564 void *data
, int need_fullname
)
3567 struct cleanup
*cleanup
;
3568 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
3569 NULL
, xcalloc
, xfree
);
3571 cleanup
= make_cleanup_htab_delete (visited
);
3572 dw2_setup (objfile
);
3574 dw2_build_type_unit_groups ();
3576 /* We can ignore file names coming from already-expanded CUs. */
3577 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3578 + dwarf2_per_objfile
->n_type_units
); ++i
)
3580 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3582 if (per_cu
->v
.quick
->symtab
)
3584 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
3587 *slot
= per_cu
->v
.quick
->file_names
;
3591 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3592 + dwarf2_per_objfile
->n_type_unit_groups
); ++i
)
3595 struct dwarf2_per_cu_data
*per_cu
= dw2_get_primary_cu (i
);
3596 struct quick_file_names
*file_data
;
3599 /* We only need to look at symtabs not already expanded. */
3600 if (per_cu
->v
.quick
->symtab
)
3603 file_data
= dw2_get_file_names (objfile
, per_cu
);
3604 if (file_data
== NULL
)
3607 slot
= htab_find_slot (visited
, file_data
, INSERT
);
3610 /* Already visited. */
3615 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
3617 const char *this_real_name
;
3620 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3622 this_real_name
= NULL
;
3623 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
3627 do_cleanups (cleanup
);
3631 dw2_has_symbols (struct objfile
*objfile
)
3636 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
3639 dw2_find_last_source_symtab
,
3640 dw2_forget_cached_source_info
,
3641 dw2_map_symtabs_matching_filename
,
3643 dw2_pre_expand_symtabs_matching
,
3647 dw2_expand_symtabs_for_function
,
3648 dw2_expand_all_symtabs
,
3649 dw2_expand_symtabs_with_filename
,
3650 dw2_find_symbol_file
,
3651 dw2_map_matching_symbols
,
3652 dw2_expand_symtabs_matching
,
3653 dw2_find_pc_sect_symtab
,
3654 dw2_map_symbol_filenames
3657 /* Initialize for reading DWARF for this objfile. Return 0 if this
3658 file will use psymtabs, or 1 if using the GNU index. */
3661 dwarf2_initialize_objfile (struct objfile
*objfile
)
3663 /* If we're about to read full symbols, don't bother with the
3664 indices. In this case we also don't care if some other debug
3665 format is making psymtabs, because they are all about to be
3667 if ((objfile
->flags
& OBJF_READNOW
))
3671 dwarf2_per_objfile
->using_index
= 1;
3672 create_all_comp_units (objfile
);
3673 create_all_type_units (objfile
);
3674 dwarf2_per_objfile
->quick_file_names_table
=
3675 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
3677 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
3678 + dwarf2_per_objfile
->n_type_units
); ++i
)
3680 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3682 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3683 struct dwarf2_per_cu_quick_data
);
3686 /* Return 1 so that gdb sees the "quick" functions. However,
3687 these functions will be no-ops because we will have expanded
3692 if (dwarf2_read_index (objfile
))
3700 /* Build a partial symbol table. */
3703 dwarf2_build_psymtabs (struct objfile
*objfile
)
3705 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3707 init_psymbol_list (objfile
, 1024);
3710 dwarf2_build_psymtabs_hard (objfile
);
3713 /* Return the total length of the CU described by HEADER. */
3716 get_cu_length (const struct comp_unit_head
*header
)
3718 return header
->initial_length_size
+ header
->length
;
3721 /* Return TRUE if OFFSET is within CU_HEADER. */
3724 offset_in_cu_p (const struct comp_unit_head
*cu_header
, sect_offset offset
)
3726 sect_offset bottom
= { cu_header
->offset
.sect_off
};
3727 sect_offset top
= { cu_header
->offset
.sect_off
+ get_cu_length (cu_header
) };
3729 return (offset
.sect_off
>= bottom
.sect_off
&& offset
.sect_off
< top
.sect_off
);
3732 /* Find the base address of the compilation unit for range lists and
3733 location lists. It will normally be specified by DW_AT_low_pc.
3734 In DWARF-3 draft 4, the base address could be overridden by
3735 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3736 compilation units with discontinuous ranges. */
3739 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3741 struct attribute
*attr
;
3744 cu
->base_address
= 0;
3746 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3749 cu
->base_address
= DW_ADDR (attr
);
3754 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3757 cu
->base_address
= DW_ADDR (attr
);
3763 /* Read in the comp unit header information from the debug_info at info_ptr.
3764 NOTE: This leaves members offset, first_die_offset to be filled in
3768 read_comp_unit_head (struct comp_unit_head
*cu_header
,
3769 gdb_byte
*info_ptr
, bfd
*abfd
)
3772 unsigned int bytes_read
;
3774 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
3775 cu_header
->initial_length_size
= bytes_read
;
3776 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
3777 info_ptr
+= bytes_read
;
3778 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
3780 cu_header
->abbrev_offset
.sect_off
= read_offset (abfd
, info_ptr
, cu_header
,
3782 info_ptr
+= bytes_read
;
3783 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
3785 signed_addr
= bfd_get_sign_extend_vma (abfd
);
3786 if (signed_addr
< 0)
3787 internal_error (__FILE__
, __LINE__
,
3788 _("read_comp_unit_head: dwarf from non elf file"));
3789 cu_header
->signed_addr_p
= signed_addr
;
3794 /* Helper function that returns the proper abbrev section for
3797 static struct dwarf2_section_info
*
3798 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
3800 struct dwarf2_section_info
*abbrev
;
3802 if (this_cu
->is_dwz
)
3803 abbrev
= &dwarf2_get_dwz_file ()->abbrev
;
3805 abbrev
= &dwarf2_per_objfile
->abbrev
;
3810 /* Subroutine of read_and_check_comp_unit_head and
3811 read_and_check_type_unit_head to simplify them.
3812 Perform various error checking on the header. */
3815 error_check_comp_unit_head (struct comp_unit_head
*header
,
3816 struct dwarf2_section_info
*section
,
3817 struct dwarf2_section_info
*abbrev_section
)
3819 bfd
*abfd
= section
->asection
->owner
;
3820 const char *filename
= bfd_get_filename (abfd
);
3822 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3823 error (_("Dwarf Error: wrong version in compilation unit header "
3824 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3827 if (header
->abbrev_offset
.sect_off
3828 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
3829 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3830 "(offset 0x%lx + 6) [in module %s]"),
3831 (long) header
->abbrev_offset
.sect_off
, (long) header
->offset
.sect_off
,
3834 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3835 avoid potential 32-bit overflow. */
3836 if (((unsigned long) header
->offset
.sect_off
+ get_cu_length (header
))
3838 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3839 "(offset 0x%lx + 0) [in module %s]"),
3840 (long) header
->length
, (long) header
->offset
.sect_off
,
3844 /* Read in a CU/TU header and perform some basic error checking.
3845 The contents of the header are stored in HEADER.
3846 The result is a pointer to the start of the first DIE. */
3849 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3850 struct dwarf2_section_info
*section
,
3851 struct dwarf2_section_info
*abbrev_section
,
3853 int is_debug_types_section
)
3855 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3856 bfd
*abfd
= section
->asection
->owner
;
3858 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3860 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3862 /* If we're reading a type unit, skip over the signature and
3863 type_offset fields. */
3864 if (is_debug_types_section
)
3865 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3867 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3869 error_check_comp_unit_head (header
, section
, abbrev_section
);
3874 /* Read in the types comp unit header information from .debug_types entry at
3875 types_ptr. The result is a pointer to one past the end of the header. */
3878 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3879 struct dwarf2_section_info
*section
,
3880 struct dwarf2_section_info
*abbrev_section
,
3882 ULONGEST
*signature
,
3883 cu_offset
*type_offset_in_tu
)
3885 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3886 bfd
*abfd
= section
->asection
->owner
;
3888 header
->offset
.sect_off
= beg_of_comp_unit
- section
->buffer
;
3890 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3892 /* If we're reading a type unit, skip over the signature and
3893 type_offset fields. */
3894 if (signature
!= NULL
)
3895 *signature
= read_8_bytes (abfd
, info_ptr
);
3897 if (type_offset_in_tu
!= NULL
)
3898 type_offset_in_tu
->cu_off
= read_offset_1 (abfd
, info_ptr
,
3899 header
->offset_size
);
3900 info_ptr
+= header
->offset_size
;
3902 header
->first_die_offset
.cu_off
= info_ptr
- beg_of_comp_unit
;
3904 error_check_comp_unit_head (header
, section
, abbrev_section
);
3909 /* Fetch the abbreviation table offset from a comp or type unit header. */
3912 read_abbrev_offset (struct dwarf2_section_info
*section
,
3915 bfd
*abfd
= section
->asection
->owner
;
3917 unsigned int length
, initial_length_size
, offset_size
;
3918 sect_offset abbrev_offset
;
3920 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
3921 info_ptr
= section
->buffer
+ offset
.sect_off
;
3922 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
3923 offset_size
= initial_length_size
== 4 ? 4 : 8;
3924 info_ptr
+= initial_length_size
+ 2 /*version*/;
3925 abbrev_offset
.sect_off
= read_offset_1 (abfd
, info_ptr
, offset_size
);
3926 return abbrev_offset
;
3929 /* Allocate a new partial symtab for file named NAME and mark this new
3930 partial symtab as being an include of PST. */
3933 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3934 struct objfile
*objfile
)
3936 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3938 subpst
->section_offsets
= pst
->section_offsets
;
3939 subpst
->textlow
= 0;
3940 subpst
->texthigh
= 0;
3942 subpst
->dependencies
= (struct partial_symtab
**)
3943 obstack_alloc (&objfile
->objfile_obstack
,
3944 sizeof (struct partial_symtab
*));
3945 subpst
->dependencies
[0] = pst
;
3946 subpst
->number_of_dependencies
= 1;
3948 subpst
->globals_offset
= 0;
3949 subpst
->n_global_syms
= 0;
3950 subpst
->statics_offset
= 0;
3951 subpst
->n_static_syms
= 0;
3952 subpst
->symtab
= NULL
;
3953 subpst
->read_symtab
= pst
->read_symtab
;
3956 /* No private part is necessary for include psymtabs. This property
3957 can be used to differentiate between such include psymtabs and
3958 the regular ones. */
3959 subpst
->read_symtab_private
= NULL
;
3962 /* Read the Line Number Program data and extract the list of files
3963 included by the source file represented by PST. Build an include
3964 partial symtab for each of these included files. */
3967 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
3968 struct die_info
*die
,
3969 struct partial_symtab
*pst
)
3971 struct line_header
*lh
= NULL
;
3972 struct attribute
*attr
;
3974 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3976 lh
= dwarf_decode_line_header (DW_UNSND (attr
), cu
);
3978 return; /* No linetable, so no includes. */
3980 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
3981 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
3983 free_line_header (lh
);
3987 hash_signatured_type (const void *item
)
3989 const struct signatured_type
*sig_type
= item
;
3991 /* This drops the top 32 bits of the signature, but is ok for a hash. */
3992 return sig_type
->signature
;
3996 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
3998 const struct signatured_type
*lhs
= item_lhs
;
3999 const struct signatured_type
*rhs
= item_rhs
;
4001 return lhs
->signature
== rhs
->signature
;
4004 /* Allocate a hash table for signatured types. */
4007 allocate_signatured_type_table (struct objfile
*objfile
)
4009 return htab_create_alloc_ex (41,
4010 hash_signatured_type
,
4013 &objfile
->objfile_obstack
,
4014 hashtab_obstack_allocate
,
4015 dummy_obstack_deallocate
);
4018 /* A helper function to add a signatured type CU to a table. */
4021 add_signatured_type_cu_to_table (void **slot
, void *datum
)
4023 struct signatured_type
*sigt
= *slot
;
4024 struct signatured_type
***datap
= datum
;
4032 /* Create the hash table of all entries in the .debug_types section.
4033 DWO_FILE is a pointer to the DWO file for .debug_types.dwo, NULL otherwise.
4034 The result is a pointer to the hash table or NULL if there are
4038 create_debug_types_hash_table (struct dwo_file
*dwo_file
,
4039 VEC (dwarf2_section_info_def
) *types
)
4041 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4042 htab_t types_htab
= NULL
;
4044 struct dwarf2_section_info
*section
;
4045 struct dwarf2_section_info
*abbrev_section
;
4047 if (VEC_empty (dwarf2_section_info_def
, types
))
4050 abbrev_section
= (dwo_file
!= NULL
4051 ? &dwo_file
->sections
.abbrev
4052 : &dwarf2_per_objfile
->abbrev
);
4054 if (dwarf2_read_debug
)
4055 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_types%s for %s:\n",
4056 dwo_file
? ".dwo" : "",
4057 bfd_get_filename (abbrev_section
->asection
->owner
));
4060 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
4064 gdb_byte
*info_ptr
, *end_ptr
;
4065 struct dwarf2_section_info
*abbrev_section
;
4067 dwarf2_read_section (objfile
, section
);
4068 info_ptr
= section
->buffer
;
4070 if (info_ptr
== NULL
)
4073 /* We can't set abfd until now because the section may be empty or
4074 not present, in which case section->asection will be NULL. */
4075 abfd
= section
->asection
->owner
;
4078 abbrev_section
= &dwo_file
->sections
.abbrev
;
4080 abbrev_section
= &dwarf2_per_objfile
->abbrev
;
4082 if (types_htab
== NULL
)
4085 types_htab
= allocate_dwo_unit_table (objfile
);
4087 types_htab
= allocate_signatured_type_table (objfile
);
4090 /* We don't use init_cutu_and_read_dies_simple, or some such, here
4091 because we don't need to read any dies: the signature is in the
4094 end_ptr
= info_ptr
+ section
->size
;
4095 while (info_ptr
< end_ptr
)
4098 cu_offset type_offset_in_tu
;
4100 struct signatured_type
*sig_type
;
4101 struct dwo_unit
*dwo_tu
;
4103 gdb_byte
*ptr
= info_ptr
;
4104 struct comp_unit_head header
;
4105 unsigned int length
;
4107 offset
.sect_off
= ptr
- section
->buffer
;
4109 /* We need to read the type's signature in order to build the hash
4110 table, but we don't need anything else just yet. */
4112 ptr
= read_and_check_type_unit_head (&header
, section
,
4113 abbrev_section
, ptr
,
4114 &signature
, &type_offset_in_tu
);
4116 length
= get_cu_length (&header
);
4118 /* Skip dummy type units. */
4119 if (ptr
>= info_ptr
+ length
4120 || peek_abbrev_code (abfd
, ptr
) == 0)
4129 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4131 dwo_tu
->dwo_file
= dwo_file
;
4132 dwo_tu
->signature
= signature
;
4133 dwo_tu
->type_offset_in_tu
= type_offset_in_tu
;
4134 dwo_tu
->info_or_types_section
= section
;
4135 dwo_tu
->offset
= offset
;
4136 dwo_tu
->length
= length
;
4140 /* N.B.: type_offset is not usable if this type uses a DWO file.
4141 The real type_offset is in the DWO file. */
4143 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4144 struct signatured_type
);
4145 sig_type
->signature
= signature
;
4146 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
4147 sig_type
->per_cu
.objfile
= objfile
;
4148 sig_type
->per_cu
.is_debug_types
= 1;
4149 sig_type
->per_cu
.info_or_types_section
= section
;
4150 sig_type
->per_cu
.offset
= offset
;
4151 sig_type
->per_cu
.length
= length
;
4154 slot
= htab_find_slot (types_htab
,
4155 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
4157 gdb_assert (slot
!= NULL
);
4160 sect_offset dup_offset
;
4164 const struct dwo_unit
*dup_tu
= *slot
;
4166 dup_offset
= dup_tu
->offset
;
4170 const struct signatured_type
*dup_tu
= *slot
;
4172 dup_offset
= dup_tu
->per_cu
.offset
;
4175 complaint (&symfile_complaints
,
4176 _("debug type entry at offset 0x%x is duplicate to the "
4177 "entry at offset 0x%x, signature 0x%s"),
4178 offset
.sect_off
, dup_offset
.sect_off
,
4179 phex (signature
, sizeof (signature
)));
4181 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
4183 if (dwarf2_read_debug
)
4184 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
4186 phex (signature
, sizeof (signature
)));
4195 /* Create the hash table of all entries in the .debug_types section,
4196 and initialize all_type_units.
4197 The result is zero if there is an error (e.g. missing .debug_types section),
4198 otherwise non-zero. */
4201 create_all_type_units (struct objfile
*objfile
)
4204 struct signatured_type
**iter
;
4206 types_htab
= create_debug_types_hash_table (NULL
, dwarf2_per_objfile
->types
);
4207 if (types_htab
== NULL
)
4209 dwarf2_per_objfile
->signatured_types
= NULL
;
4213 dwarf2_per_objfile
->signatured_types
= types_htab
;
4215 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
4216 dwarf2_per_objfile
->all_type_units
4217 = obstack_alloc (&objfile
->objfile_obstack
,
4218 dwarf2_per_objfile
->n_type_units
4219 * sizeof (struct signatured_type
*));
4220 iter
= &dwarf2_per_objfile
->all_type_units
[0];
4221 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
4222 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
4223 == dwarf2_per_objfile
->n_type_units
);
4228 /* Lookup a signature based type for DW_FORM_ref_sig8.
4229 Returns NULL if signature SIG is not present in the table. */
4231 static struct signatured_type
*
4232 lookup_signatured_type (ULONGEST sig
)
4234 struct signatured_type find_entry
, *entry
;
4236 if (dwarf2_per_objfile
->signatured_types
== NULL
)
4238 complaint (&symfile_complaints
,
4239 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
4243 find_entry
.signature
= sig
;
4244 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
4248 /* Low level DIE reading support. */
4250 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
4253 init_cu_die_reader (struct die_reader_specs
*reader
,
4254 struct dwarf2_cu
*cu
,
4255 struct dwarf2_section_info
*section
,
4256 struct dwo_file
*dwo_file
)
4258 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
4259 reader
->abfd
= section
->asection
->owner
;
4261 reader
->dwo_file
= dwo_file
;
4262 reader
->die_section
= section
;
4263 reader
->buffer
= section
->buffer
;
4264 reader
->buffer_end
= section
->buffer
+ section
->size
;
4267 /* Initialize a CU (or TU) and read its DIEs.
4268 If the CU defers to a DWO file, read the DWO file as well.
4270 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
4271 Otherwise the table specified in the comp unit header is read in and used.
4272 This is an optimization for when we already have the abbrev table.
4274 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
4275 Otherwise, a new CU is allocated with xmalloc.
4277 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
4278 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
4280 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4281 linker) then DIE_READER_FUNC will not get called. */
4284 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
4285 struct abbrev_table
*abbrev_table
,
4286 int use_existing_cu
, int keep
,
4287 die_reader_func_ftype
*die_reader_func
,
4290 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4291 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4292 bfd
*abfd
= section
->asection
->owner
;
4293 struct dwarf2_cu
*cu
;
4294 gdb_byte
*begin_info_ptr
, *info_ptr
;
4295 struct die_reader_specs reader
;
4296 struct die_info
*comp_unit_die
;
4298 struct attribute
*attr
;
4299 struct cleanup
*cleanups
, *free_cu_cleanup
= NULL
;
4300 struct signatured_type
*sig_type
= NULL
;
4301 struct dwarf2_section_info
*abbrev_section
;
4302 /* Non-zero if CU currently points to a DWO file and we need to
4303 reread it. When this happens we need to reread the skeleton die
4304 before we can reread the DWO file. */
4305 int rereading_dwo_cu
= 0;
4307 if (dwarf2_die_debug
)
4308 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4309 this_cu
->is_debug_types
? "type" : "comp",
4310 this_cu
->offset
.sect_off
);
4312 if (use_existing_cu
)
4315 cleanups
= make_cleanup (null_cleanup
, NULL
);
4317 /* This is cheap if the section is already read in. */
4318 dwarf2_read_section (objfile
, section
);
4320 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4322 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
4324 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
4328 /* If this CU is from a DWO file we need to start over, we need to
4329 refetch the attributes from the skeleton CU.
4330 This could be optimized by retrieving those attributes from when we
4331 were here the first time: the previous comp_unit_die was stored in
4332 comp_unit_obstack. But there's no data yet that we need this
4334 if (cu
->dwo_unit
!= NULL
)
4335 rereading_dwo_cu
= 1;
4339 /* If !use_existing_cu, this_cu->cu must be NULL. */
4340 gdb_assert (this_cu
->cu
== NULL
);
4342 cu
= xmalloc (sizeof (*cu
));
4343 init_one_comp_unit (cu
, this_cu
);
4345 /* If an error occurs while loading, release our storage. */
4346 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4349 if (cu
->header
.first_die_offset
.cu_off
!= 0 && ! rereading_dwo_cu
)
4351 /* We already have the header, there's no need to read it in again. */
4352 info_ptr
+= cu
->header
.first_die_offset
.cu_off
;
4356 if (this_cu
->is_debug_types
)
4359 cu_offset type_offset_in_tu
;
4361 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4362 abbrev_section
, info_ptr
,
4364 &type_offset_in_tu
);
4366 /* Since per_cu is the first member of struct signatured_type,
4367 we can go from a pointer to one to a pointer to the other. */
4368 sig_type
= (struct signatured_type
*) this_cu
;
4369 gdb_assert (sig_type
->signature
== signature
);
4370 gdb_assert (sig_type
->type_offset_in_tu
.cu_off
4371 == type_offset_in_tu
.cu_off
);
4372 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4374 /* LENGTH has not been set yet for type units if we're
4375 using .gdb_index. */
4376 this_cu
->length
= get_cu_length (&cu
->header
);
4378 /* Establish the type offset that can be used to lookup the type. */
4379 sig_type
->type_offset_in_section
.sect_off
=
4380 this_cu
->offset
.sect_off
+ sig_type
->type_offset_in_tu
.cu_off
;
4384 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4388 gdb_assert (this_cu
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4389 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
4393 /* Skip dummy compilation units. */
4394 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4395 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4397 do_cleanups (cleanups
);
4401 /* If we don't have them yet, read the abbrevs for this compilation unit.
4402 And if we need to read them now, make sure they're freed when we're
4403 done. Note that it's important that if the CU had an abbrev table
4404 on entry we don't free it when we're done: Somewhere up the call stack
4405 it may be in use. */
4406 if (abbrev_table
!= NULL
)
4408 gdb_assert (cu
->abbrev_table
== NULL
);
4409 gdb_assert (cu
->header
.abbrev_offset
.sect_off
4410 == abbrev_table
->offset
.sect_off
);
4411 cu
->abbrev_table
= abbrev_table
;
4413 else if (cu
->abbrev_table
== NULL
)
4415 dwarf2_read_abbrevs (cu
, abbrev_section
);
4416 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4418 else if (rereading_dwo_cu
)
4420 dwarf2_free_abbrev_table (cu
);
4421 dwarf2_read_abbrevs (cu
, abbrev_section
);
4424 /* Read the top level CU/TU die. */
4425 init_cu_die_reader (&reader
, cu
, section
, NULL
);
4426 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4428 /* If we have a DWO stub, process it and then read in the DWO file.
4429 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains
4430 a DWO CU, that this test will fail. */
4431 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
4434 char *dwo_name
= DW_STRING (attr
);
4435 const char *comp_dir_string
;
4436 struct dwo_unit
*dwo_unit
;
4437 ULONGEST signature
; /* Or dwo_id. */
4438 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
4439 int i
,num_extra_attrs
;
4440 struct dwarf2_section_info
*dwo_abbrev_section
;
4443 error (_("Dwarf Error: compilation unit with DW_AT_GNU_dwo_name"
4444 " has children (offset 0x%x) [in module %s]"),
4445 this_cu
->offset
.sect_off
, bfd_get_filename (abfd
));
4447 /* These attributes aren't processed until later:
4448 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
4449 However, the attribute is found in the stub which we won't have later.
4450 In order to not impose this complication on the rest of the code,
4451 we read them here and copy them to the DWO CU/TU die. */
4453 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
4456 if (! this_cu
->is_debug_types
)
4457 stmt_list
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
4458 low_pc
= dwarf2_attr (comp_unit_die
, DW_AT_low_pc
, cu
);
4459 high_pc
= dwarf2_attr (comp_unit_die
, DW_AT_high_pc
, cu
);
4460 ranges
= dwarf2_attr (comp_unit_die
, DW_AT_ranges
, cu
);
4461 comp_dir
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4463 /* There should be a DW_AT_addr_base attribute here (if needed).
4464 We need the value before we can process DW_FORM_GNU_addr_index. */
4466 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
4468 cu
->addr_base
= DW_UNSND (attr
);
4470 /* There should be a DW_AT_ranges_base attribute here (if needed).
4471 We need the value before we can process DW_AT_ranges. */
4472 cu
->ranges_base
= 0;
4473 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
4475 cu
->ranges_base
= DW_UNSND (attr
);
4477 if (this_cu
->is_debug_types
)
4479 gdb_assert (sig_type
!= NULL
);
4480 signature
= sig_type
->signature
;
4484 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
4486 error (_("Dwarf Error: missing dwo_id [in module %s]"),
4488 signature
= DW_UNSND (attr
);
4491 /* We may need the comp_dir in order to find the DWO file. */
4492 comp_dir_string
= NULL
;
4494 comp_dir_string
= DW_STRING (comp_dir
);
4496 if (this_cu
->is_debug_types
)
4497 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir_string
);
4499 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir_string
,
4502 if (dwo_unit
== NULL
)
4504 error (_("Dwarf Error: CU at offset 0x%x references unknown DWO"
4505 " with ID %s [in module %s]"),
4506 this_cu
->offset
.sect_off
,
4507 phex (signature
, sizeof (signature
)),
4511 /* Set up for reading the DWO CU/TU. */
4512 cu
->dwo_unit
= dwo_unit
;
4513 section
= dwo_unit
->info_or_types_section
;
4514 begin_info_ptr
= info_ptr
= section
->buffer
+ dwo_unit
->offset
.sect_off
;
4515 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
4516 init_cu_die_reader (&reader
, cu
, section
, dwo_unit
->dwo_file
);
4518 if (this_cu
->is_debug_types
)
4522 info_ptr
= read_and_check_type_unit_head (&cu
->header
, section
,
4526 gdb_assert (sig_type
->signature
== signature
);
4527 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4528 gdb_assert (dwo_unit
->length
== get_cu_length (&cu
->header
));
4530 /* Establish the type offset that can be used to lookup the type.
4531 For DWO files, we don't know it until now. */
4532 sig_type
->type_offset_in_section
.sect_off
=
4533 dwo_unit
->offset
.sect_off
+ dwo_unit
->type_offset_in_tu
.cu_off
;
4537 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
,
4540 gdb_assert (dwo_unit
->offset
.sect_off
== cu
->header
.offset
.sect_off
);
4541 gdb_assert (dwo_unit
->length
== get_cu_length (&cu
->header
));
4544 /* Discard the original CU's abbrev table, and read the DWO's. */
4545 if (abbrev_table
== NULL
)
4547 dwarf2_free_abbrev_table (cu
);
4548 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4552 dwarf2_read_abbrevs (cu
, dwo_abbrev_section
);
4553 make_cleanup (dwarf2_free_abbrev_table
, cu
);
4556 /* Read in the die, but leave space to copy over the attributes
4557 from the stub. This has the benefit of simplifying the rest of
4558 the code - all the real work is done here. */
4559 num_extra_attrs
= ((stmt_list
!= NULL
)
4563 + (comp_dir
!= NULL
));
4564 info_ptr
= read_full_die_1 (&reader
, &comp_unit_die
, info_ptr
,
4565 &has_children
, num_extra_attrs
);
4567 /* Copy over the attributes from the stub to the DWO die. */
4568 i
= comp_unit_die
->num_attrs
;
4569 if (stmt_list
!= NULL
)
4570 comp_unit_die
->attrs
[i
++] = *stmt_list
;
4572 comp_unit_die
->attrs
[i
++] = *low_pc
;
4573 if (high_pc
!= NULL
)
4574 comp_unit_die
->attrs
[i
++] = *high_pc
;
4576 comp_unit_die
->attrs
[i
++] = *ranges
;
4577 if (comp_dir
!= NULL
)
4578 comp_unit_die
->attrs
[i
++] = *comp_dir
;
4579 comp_unit_die
->num_attrs
+= num_extra_attrs
;
4581 /* Skip dummy compilation units. */
4582 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
4583 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4585 do_cleanups (cleanups
);
4590 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4592 if (free_cu_cleanup
!= NULL
)
4596 /* We've successfully allocated this compilation unit. Let our
4597 caller clean it up when finished with it. */
4598 discard_cleanups (free_cu_cleanup
);
4600 /* We can only discard free_cu_cleanup and all subsequent cleanups.
4601 So we have to manually free the abbrev table. */
4602 dwarf2_free_abbrev_table (cu
);
4604 /* Link this CU into read_in_chain. */
4605 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4606 dwarf2_per_objfile
->read_in_chain
= this_cu
;
4609 do_cleanups (free_cu_cleanup
);
4612 do_cleanups (cleanups
);
4615 /* Read CU/TU THIS_CU in section SECTION,
4616 but do not follow DW_AT_GNU_dwo_name if present.
4617 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed to
4618 have already done the lookup to find the DWO file).
4620 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
4621 THIS_CU->is_debug_types, but nothing else.
4623 We fill in THIS_CU->length.
4625 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
4626 linker) then DIE_READER_FUNC will not get called.
4628 THIS_CU->cu is always freed when done.
4629 This is done in order to not leave THIS_CU->cu in a state where we have
4630 to care whether it refers to the "main" CU or the DWO CU. */
4633 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
4634 struct dwarf2_section_info
*abbrev_section
,
4635 struct dwo_file
*dwo_file
,
4636 die_reader_func_ftype
*die_reader_func
,
4639 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4640 struct dwarf2_section_info
*section
= this_cu
->info_or_types_section
;
4641 bfd
*abfd
= section
->asection
->owner
;
4642 struct dwarf2_cu cu
;
4643 gdb_byte
*begin_info_ptr
, *info_ptr
;
4644 struct die_reader_specs reader
;
4645 struct cleanup
*cleanups
;
4646 struct die_info
*comp_unit_die
;
4649 if (dwarf2_die_debug
)
4650 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset 0x%x\n",
4651 this_cu
->is_debug_types
? "type" : "comp",
4652 this_cu
->offset
.sect_off
);
4654 gdb_assert (this_cu
->cu
== NULL
);
4656 /* This is cheap if the section is already read in. */
4657 dwarf2_read_section (objfile
, section
);
4659 init_one_comp_unit (&cu
, this_cu
);
4661 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
4663 begin_info_ptr
= info_ptr
= section
->buffer
+ this_cu
->offset
.sect_off
;
4664 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
,
4665 abbrev_section
, info_ptr
,
4666 this_cu
->is_debug_types
);
4668 this_cu
->length
= get_cu_length (&cu
.header
);
4670 /* Skip dummy compilation units. */
4671 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
4672 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4674 do_cleanups (cleanups
);
4678 dwarf2_read_abbrevs (&cu
, abbrev_section
);
4679 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
4681 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
);
4682 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
4684 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
4686 do_cleanups (cleanups
);
4689 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
4690 does not lookup the specified DWO file.
4691 This cannot be used to read DWO files.
4693 THIS_CU->cu is always freed when done.
4694 This is done in order to not leave THIS_CU->cu in a state where we have
4695 to care whether it refers to the "main" CU or the DWO CU.
4696 We can revisit this if the data shows there's a performance issue. */
4699 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
4700 die_reader_func_ftype
*die_reader_func
,
4703 init_cutu_and_read_dies_no_follow (this_cu
,
4704 get_abbrev_section_for_cu (this_cu
),
4706 die_reader_func
, data
);
4709 /* Create a psymtab named NAME and assign it to PER_CU.
4711 The caller must fill in the following details:
4712 dirname, textlow, texthigh. */
4714 static struct partial_symtab
*
4715 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
4717 struct objfile
*objfile
= per_cu
->objfile
;
4718 struct partial_symtab
*pst
;
4720 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
4722 objfile
->global_psymbols
.next
,
4723 objfile
->static_psymbols
.next
);
4725 pst
->psymtabs_addrmap_supported
= 1;
4727 /* This is the glue that links PST into GDB's symbol API. */
4728 pst
->read_symtab_private
= per_cu
;
4729 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
4730 per_cu
->v
.psymtab
= pst
;
4735 /* die_reader_func for process_psymtab_comp_unit. */
4738 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
4740 struct die_info
*comp_unit_die
,
4744 struct dwarf2_cu
*cu
= reader
->cu
;
4745 struct objfile
*objfile
= cu
->objfile
;
4746 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
4747 struct attribute
*attr
;
4749 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
4750 struct partial_symtab
*pst
;
4752 const char *filename
;
4753 int *want_partial_unit_ptr
= data
;
4755 if (comp_unit_die
->tag
== DW_TAG_partial_unit
4756 && (want_partial_unit_ptr
== NULL
4757 || !*want_partial_unit_ptr
))
4760 gdb_assert (! per_cu
->is_debug_types
);
4762 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
4764 cu
->list_in_scope
= &file_symbols
;
4766 /* Allocate a new partial symbol table structure. */
4767 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, cu
);
4768 if (attr
== NULL
|| !DW_STRING (attr
))
4771 filename
= DW_STRING (attr
);
4773 pst
= create_partial_symtab (per_cu
, filename
);
4775 /* This must be done before calling dwarf2_build_include_psymtabs. */
4776 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
4778 pst
->dirname
= DW_STRING (attr
);
4780 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4782 dwarf2_find_base_address (comp_unit_die
, cu
);
4784 /* Possibly set the default values of LOWPC and HIGHPC from
4786 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
4787 &best_highpc
, cu
, pst
);
4788 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
4789 /* Store the contiguous range if it is not empty; it can be empty for
4790 CUs with no code. */
4791 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4792 best_lowpc
+ baseaddr
,
4793 best_highpc
+ baseaddr
- 1, pst
);
4795 /* Check if comp unit has_children.
4796 If so, read the rest of the partial symbols from this comp unit.
4797 If not, there's no more debug_info for this comp unit. */
4800 struct partial_die_info
*first_die
;
4801 CORE_ADDR lowpc
, highpc
;
4803 lowpc
= ((CORE_ADDR
) -1);
4804 highpc
= ((CORE_ADDR
) 0);
4806 first_die
= load_partial_dies (reader
, info_ptr
, 1);
4808 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
4811 /* If we didn't find a lowpc, set it to highpc to avoid
4812 complaints from `maint check'. */
4813 if (lowpc
== ((CORE_ADDR
) -1))
4816 /* If the compilation unit didn't have an explicit address range,
4817 then use the information extracted from its child dies. */
4821 best_highpc
= highpc
;
4824 pst
->textlow
= best_lowpc
+ baseaddr
;
4825 pst
->texthigh
= best_highpc
+ baseaddr
;
4827 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
4828 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
4829 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
4830 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
4831 sort_pst_symbols (pst
);
4833 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
))
4836 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4837 struct dwarf2_per_cu_data
*iter
;
4839 /* Fill in 'dependencies' here; we fill in 'users' in a
4841 pst
->number_of_dependencies
= len
;
4842 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
4843 len
* sizeof (struct symtab
*));
4845 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
4848 pst
->dependencies
[i
] = iter
->v
.psymtab
;
4850 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
);
4853 /* Get the list of files included in the current compilation unit,
4854 and build a psymtab for each of them. */
4855 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
4857 if (dwarf2_read_debug
)
4859 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4861 fprintf_unfiltered (gdb_stdlog
,
4862 "Psymtab for %s unit @0x%x: 0x%s - 0x%s"
4863 ", %d global, %d static syms\n",
4864 per_cu
->is_debug_types
? "type" : "comp",
4865 per_cu
->offset
.sect_off
,
4866 paddress (gdbarch
, pst
->textlow
),
4867 paddress (gdbarch
, pst
->texthigh
),
4868 pst
->n_global_syms
, pst
->n_static_syms
);
4872 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
4873 Process compilation unit THIS_CU for a psymtab. */
4876 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
4877 int want_partial_unit
)
4879 /* If this compilation unit was already read in, free the
4880 cached copy in order to read it in again. This is
4881 necessary because we skipped some symbols when we first
4882 read in the compilation unit (see load_partial_dies).
4883 This problem could be avoided, but the benefit is unclear. */
4884 if (this_cu
->cu
!= NULL
)
4885 free_one_cached_comp_unit (this_cu
);
4887 gdb_assert (! this_cu
->is_debug_types
);
4888 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
4889 process_psymtab_comp_unit_reader
,
4890 &want_partial_unit
);
4892 /* Age out any secondary CUs. */
4893 age_cached_comp_units ();
4897 hash_type_unit_group (const void *item
)
4899 const struct type_unit_group
*tu_group
= item
;
4901 return hash_stmt_list_entry (&tu_group
->hash
);
4905 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
4907 const struct type_unit_group
*lhs
= item_lhs
;
4908 const struct type_unit_group
*rhs
= item_rhs
;
4910 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
4913 /* Allocate a hash table for type unit groups. */
4916 allocate_type_unit_groups_table (void)
4918 return htab_create_alloc_ex (3,
4919 hash_type_unit_group
,
4922 &dwarf2_per_objfile
->objfile
->objfile_obstack
,
4923 hashtab_obstack_allocate
,
4924 dummy_obstack_deallocate
);
4927 /* Type units that don't have DW_AT_stmt_list are grouped into their own
4928 partial symtabs. We combine several TUs per psymtab to not let the size
4929 of any one psymtab grow too big. */
4930 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
4931 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
4933 /* Helper routine for get_type_unit_group.
4934 Create the type_unit_group object used to hold one or more TUs. */
4936 static struct type_unit_group
*
4937 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
4939 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
4940 struct dwarf2_per_cu_data
*per_cu
;
4941 struct type_unit_group
*tu_group
;
4943 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4944 struct type_unit_group
);
4945 per_cu
= &tu_group
->per_cu
;
4946 per_cu
->objfile
= objfile
;
4947 per_cu
->is_debug_types
= 1;
4948 per_cu
->s
.type_unit_group
= tu_group
;
4950 if (dwarf2_per_objfile
->using_index
)
4952 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
4953 struct dwarf2_per_cu_quick_data
);
4954 tu_group
->t
.first_tu
= cu
->per_cu
;
4958 unsigned int line_offset
= line_offset_struct
.sect_off
;
4959 struct partial_symtab
*pst
;
4962 /* Give the symtab a useful name for debug purposes. */
4963 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
4964 name
= xstrprintf ("<type_units_%d>",
4965 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
4967 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
4969 pst
= create_partial_symtab (per_cu
, name
);
4975 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
4976 tu_group
->hash
.line_offset
= line_offset_struct
;
4981 /* Look up the type_unit_group for type unit CU, and create it if necessary.
4982 STMT_LIST is a DW_AT_stmt_list attribute. */
4984 static struct type_unit_group
*
4985 get_type_unit_group (struct dwarf2_cu
*cu
, struct attribute
*stmt_list
)
4987 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
4988 struct type_unit_group
*tu_group
;
4990 unsigned int line_offset
;
4991 struct type_unit_group type_unit_group_for_lookup
;
4993 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
4995 dwarf2_per_objfile
->type_unit_groups
=
4996 allocate_type_unit_groups_table ();
4999 /* Do we need to create a new group, or can we use an existing one? */
5003 line_offset
= DW_UNSND (stmt_list
);
5004 ++tu_stats
->nr_symtab_sharers
;
5008 /* Ugh, no stmt_list. Rare, but we have to handle it.
5009 We can do various things here like create one group per TU or
5010 spread them over multiple groups to split up the expansion work.
5011 To avoid worst case scenarios (too many groups or too large groups)
5012 we, umm, group them in bunches. */
5013 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
5014 | (tu_stats
->nr_stmt_less_type_units
5015 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
5016 ++tu_stats
->nr_stmt_less_type_units
;
5019 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
5020 type_unit_group_for_lookup
.hash
.line_offset
.sect_off
= line_offset
;
5021 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
5022 &type_unit_group_for_lookup
, INSERT
);
5026 gdb_assert (tu_group
!= NULL
);
5030 sect_offset line_offset_struct
;
5032 line_offset_struct
.sect_off
= line_offset
;
5033 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
5035 ++tu_stats
->nr_symtabs
;
5041 /* Struct used to sort TUs by their abbreviation table offset. */
5043 struct tu_abbrev_offset
5045 struct signatured_type
*sig_type
;
5046 sect_offset abbrev_offset
;
5049 /* Helper routine for build_type_unit_groups, passed to qsort. */
5052 sort_tu_by_abbrev_offset (const void *ap
, const void *bp
)
5054 const struct tu_abbrev_offset
* const *a
= ap
;
5055 const struct tu_abbrev_offset
* const *b
= bp
;
5056 unsigned int aoff
= (*a
)->abbrev_offset
.sect_off
;
5057 unsigned int boff
= (*b
)->abbrev_offset
.sect_off
;
5059 return (aoff
> boff
) - (aoff
< boff
);
5062 /* A helper function to add a type_unit_group to a table. */
5065 add_type_unit_group_to_table (void **slot
, void *datum
)
5067 struct type_unit_group
*tu_group
= *slot
;
5068 struct type_unit_group
***datap
= datum
;
5076 /* Efficiently read all the type units, calling init_cutu_and_read_dies on
5077 each one passing FUNC,DATA.
5079 The efficiency is because we sort TUs by the abbrev table they use and
5080 only read each abbrev table once. In one program there are 200K TUs
5081 sharing 8K abbrev tables.
5083 The main purpose of this function is to support building the
5084 dwarf2_per_objfile->type_unit_groups table.
5085 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
5086 can collapse the search space by grouping them by stmt_list.
5087 The savings can be significant, in the same program from above the 200K TUs
5088 share 8K stmt_list tables.
5090 FUNC is expected to call get_type_unit_group, which will create the
5091 struct type_unit_group if necessary and add it to
5092 dwarf2_per_objfile->type_unit_groups. */
5095 build_type_unit_groups (die_reader_func_ftype
*func
, void *data
)
5097 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5098 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
5099 struct cleanup
*cleanups
;
5100 struct abbrev_table
*abbrev_table
;
5101 sect_offset abbrev_offset
;
5102 struct tu_abbrev_offset
*sorted_by_abbrev
;
5103 struct type_unit_group
**iter
;
5106 /* It's up to the caller to not call us multiple times. */
5107 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
5109 if (dwarf2_per_objfile
->n_type_units
== 0)
5112 /* TUs typically share abbrev tables, and there can be way more TUs than
5113 abbrev tables. Sort by abbrev table to reduce the number of times we
5114 read each abbrev table in.
5115 Alternatives are to punt or to maintain a cache of abbrev tables.
5116 This is simpler and efficient enough for now.
5118 Later we group TUs by their DW_AT_stmt_list value (as this defines the
5119 symtab to use). Typically TUs with the same abbrev offset have the same
5120 stmt_list value too so in practice this should work well.
5122 The basic algorithm here is:
5124 sort TUs by abbrev table
5125 for each TU with same abbrev table:
5126 read abbrev table if first user
5127 read TU top level DIE
5128 [IWBN if DWO skeletons had DW_AT_stmt_list]
5131 if (dwarf2_read_debug
)
5132 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
5134 /* Sort in a separate table to maintain the order of all_type_units
5135 for .gdb_index: TU indices directly index all_type_units. */
5136 sorted_by_abbrev
= XNEWVEC (struct tu_abbrev_offset
,
5137 dwarf2_per_objfile
->n_type_units
);
5138 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5140 struct signatured_type
*sig_type
= dwarf2_per_objfile
->all_type_units
[i
];
5142 sorted_by_abbrev
[i
].sig_type
= sig_type
;
5143 sorted_by_abbrev
[i
].abbrev_offset
=
5144 read_abbrev_offset (sig_type
->per_cu
.info_or_types_section
,
5145 sig_type
->per_cu
.offset
);
5147 cleanups
= make_cleanup (xfree
, sorted_by_abbrev
);
5148 qsort (sorted_by_abbrev
, dwarf2_per_objfile
->n_type_units
,
5149 sizeof (struct tu_abbrev_offset
), sort_tu_by_abbrev_offset
);
5151 /* Note: In the .gdb_index case, get_type_unit_group may have already been
5152 called any number of times, so we don't reset tu_stats here. */
5154 abbrev_offset
.sect_off
= ~(unsigned) 0;
5155 abbrev_table
= NULL
;
5156 make_cleanup (abbrev_table_free_cleanup
, &abbrev_table
);
5158 for (i
= 0; i
< dwarf2_per_objfile
->n_type_units
; ++i
)
5160 const struct tu_abbrev_offset
*tu
= &sorted_by_abbrev
[i
];
5162 /* Switch to the next abbrev table if necessary. */
5163 if (abbrev_table
== NULL
5164 || tu
->abbrev_offset
.sect_off
!= abbrev_offset
.sect_off
)
5166 if (abbrev_table
!= NULL
)
5168 abbrev_table_free (abbrev_table
);
5169 /* Reset to NULL in case abbrev_table_read_table throws
5170 an error: abbrev_table_free_cleanup will get called. */
5171 abbrev_table
= NULL
;
5173 abbrev_offset
= tu
->abbrev_offset
;
5175 abbrev_table_read_table (&dwarf2_per_objfile
->abbrev
,
5177 ++tu_stats
->nr_uniq_abbrev_tables
;
5180 init_cutu_and_read_dies (&tu
->sig_type
->per_cu
, abbrev_table
, 0, 0,
5184 /* Create a vector of pointers to primary type units to make it easy to
5185 iterate over them and CUs. See dw2_get_primary_cu. */
5186 dwarf2_per_objfile
->n_type_unit_groups
=
5187 htab_elements (dwarf2_per_objfile
->type_unit_groups
);
5188 dwarf2_per_objfile
->all_type_unit_groups
=
5189 obstack_alloc (&objfile
->objfile_obstack
,
5190 dwarf2_per_objfile
->n_type_unit_groups
5191 * sizeof (struct type_unit_group
*));
5192 iter
= &dwarf2_per_objfile
->all_type_unit_groups
[0];
5193 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5194 add_type_unit_group_to_table
, &iter
);
5195 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_unit_groups
[0]
5196 == dwarf2_per_objfile
->n_type_unit_groups
);
5198 do_cleanups (cleanups
);
5200 if (dwarf2_read_debug
)
5202 fprintf_unfiltered (gdb_stdlog
, "Done building type unit groups:\n");
5203 fprintf_unfiltered (gdb_stdlog
, " %d TUs\n",
5204 dwarf2_per_objfile
->n_type_units
);
5205 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
5206 tu_stats
->nr_uniq_abbrev_tables
);
5207 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
5208 tu_stats
->nr_symtabs
);
5209 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
5210 tu_stats
->nr_symtab_sharers
);
5211 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
5212 tu_stats
->nr_stmt_less_type_units
);
5216 /* Reader function for build_type_psymtabs. */
5219 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
5221 struct die_info
*type_unit_die
,
5225 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5226 struct dwarf2_cu
*cu
= reader
->cu
;
5227 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
5228 struct type_unit_group
*tu_group
;
5229 struct attribute
*attr
;
5230 struct partial_die_info
*first_die
;
5231 CORE_ADDR lowpc
, highpc
;
5232 struct partial_symtab
*pst
;
5234 gdb_assert (data
== NULL
);
5239 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
5240 tu_group
= get_type_unit_group (cu
, attr
);
5242 VEC_safe_push (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, per_cu
);
5244 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
5245 cu
->list_in_scope
= &file_symbols
;
5246 pst
= create_partial_symtab (per_cu
, "");
5249 first_die
= load_partial_dies (reader
, info_ptr
, 1);
5251 lowpc
= (CORE_ADDR
) -1;
5252 highpc
= (CORE_ADDR
) 0;
5253 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
5255 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
5256 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
5257 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
5258 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
5259 sort_pst_symbols (pst
);
5262 /* Traversal function for build_type_psymtabs. */
5265 build_type_psymtab_dependencies (void **slot
, void *info
)
5267 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5268 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
5269 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
5270 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5271 int len
= VEC_length (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5272 struct dwarf2_per_cu_data
*iter
;
5275 gdb_assert (len
> 0);
5277 pst
->number_of_dependencies
= len
;
5278 pst
->dependencies
= obstack_alloc (&objfile
->objfile_obstack
,
5279 len
* sizeof (struct psymtab
*));
5281 VEC_iterate (dwarf2_per_cu_ptr
, tu_group
->t
.tus
, i
, iter
);
5284 pst
->dependencies
[i
] = iter
->v
.psymtab
;
5285 iter
->s
.type_unit_group
= tu_group
;
5288 VEC_free (dwarf2_per_cu_ptr
, tu_group
->t
.tus
);
5293 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
5294 Build partial symbol tables for the .debug_types comp-units. */
5297 build_type_psymtabs (struct objfile
*objfile
)
5299 if (! create_all_type_units (objfile
))
5302 build_type_unit_groups (build_type_psymtabs_reader
, NULL
);
5304 /* Now that all TUs have been processed we can fill in the dependencies. */
5305 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
5306 build_type_psymtab_dependencies
, NULL
);
5309 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
5312 psymtabs_addrmap_cleanup (void *o
)
5314 struct objfile
*objfile
= o
;
5316 objfile
->psymtabs_addrmap
= NULL
;
5319 /* Compute the 'user' field for each psymtab in OBJFILE. */
5322 set_partial_user (struct objfile
*objfile
)
5326 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5328 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5329 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
5335 for (j
= 0; j
< pst
->number_of_dependencies
; ++j
)
5337 /* Set the 'user' field only if it is not already set. */
5338 if (pst
->dependencies
[j
]->user
== NULL
)
5339 pst
->dependencies
[j
]->user
= pst
;
5344 /* Build the partial symbol table by doing a quick pass through the
5345 .debug_info and .debug_abbrev sections. */
5348 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
5350 struct cleanup
*back_to
, *addrmap_cleanup
;
5351 struct obstack temp_obstack
;
5354 if (dwarf2_read_debug
)
5356 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
5360 dwarf2_per_objfile
->reading_partial_symbols
= 1;
5362 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
5364 /* Any cached compilation units will be linked by the per-objfile
5365 read_in_chain. Make sure to free them when we're done. */
5366 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
5368 build_type_psymtabs (objfile
);
5370 create_all_comp_units (objfile
);
5372 /* Create a temporary address map on a temporary obstack. We later
5373 copy this to the final obstack. */
5374 obstack_init (&temp_obstack
);
5375 make_cleanup_obstack_free (&temp_obstack
);
5376 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
5377 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
5379 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
5381 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
5383 process_psymtab_comp_unit (per_cu
, 0);
5386 set_partial_user (objfile
);
5388 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
5389 &objfile
->objfile_obstack
);
5390 discard_cleanups (addrmap_cleanup
);
5392 do_cleanups (back_to
);
5394 if (dwarf2_read_debug
)
5395 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
5399 /* die_reader_func for load_partial_comp_unit. */
5402 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
5404 struct die_info
*comp_unit_die
,
5408 struct dwarf2_cu
*cu
= reader
->cu
;
5410 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
5412 /* Check if comp unit has_children.
5413 If so, read the rest of the partial symbols from this comp unit.
5414 If not, there's no more debug_info for this comp unit. */
5416 load_partial_dies (reader
, info_ptr
, 0);
5419 /* Load the partial DIEs for a secondary CU into memory.
5420 This is also used when rereading a primary CU with load_all_dies. */
5423 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
5425 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
5426 load_partial_comp_unit_reader
, NULL
);
5430 read_comp_units_from_section (struct objfile
*objfile
,
5431 struct dwarf2_section_info
*section
,
5432 unsigned int is_dwz
,
5435 struct dwarf2_per_cu_data
***all_comp_units
)
5438 bfd
*abfd
= section
->asection
->owner
;
5440 dwarf2_read_section (objfile
, section
);
5442 info_ptr
= section
->buffer
;
5444 while (info_ptr
< section
->buffer
+ section
->size
)
5446 unsigned int length
, initial_length_size
;
5447 struct dwarf2_per_cu_data
*this_cu
;
5450 offset
.sect_off
= info_ptr
- section
->buffer
;
5452 /* Read just enough information to find out where the next
5453 compilation unit is. */
5454 length
= read_initial_length (abfd
, info_ptr
, &initial_length_size
);
5456 /* Save the compilation unit for later lookup. */
5457 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
5458 sizeof (struct dwarf2_per_cu_data
));
5459 memset (this_cu
, 0, sizeof (*this_cu
));
5460 this_cu
->offset
= offset
;
5461 this_cu
->length
= length
+ initial_length_size
;
5462 this_cu
->is_dwz
= is_dwz
;
5463 this_cu
->objfile
= objfile
;
5464 this_cu
->info_or_types_section
= section
;
5466 if (*n_comp_units
== *n_allocated
)
5469 *all_comp_units
= xrealloc (*all_comp_units
,
5471 * sizeof (struct dwarf2_per_cu_data
*));
5473 (*all_comp_units
)[*n_comp_units
] = this_cu
;
5476 info_ptr
= info_ptr
+ this_cu
->length
;
5480 /* Create a list of all compilation units in OBJFILE.
5481 This is only done for -readnow and building partial symtabs. */
5484 create_all_comp_units (struct objfile
*objfile
)
5488 struct dwarf2_per_cu_data
**all_comp_units
;
5492 all_comp_units
= xmalloc (n_allocated
5493 * sizeof (struct dwarf2_per_cu_data
*));
5495 read_comp_units_from_section (objfile
, &dwarf2_per_objfile
->info
, 0,
5496 &n_allocated
, &n_comp_units
, &all_comp_units
);
5498 if (bfd_get_section_by_name (objfile
->obfd
, ".gnu_debugaltlink") != NULL
)
5500 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
5502 read_comp_units_from_section (objfile
, &dwz
->info
, 1,
5503 &n_allocated
, &n_comp_units
,
5507 dwarf2_per_objfile
->all_comp_units
5508 = obstack_alloc (&objfile
->objfile_obstack
,
5509 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5510 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
5511 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
5512 xfree (all_comp_units
);
5513 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
5516 /* Process all loaded DIEs for compilation unit CU, starting at
5517 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
5518 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
5519 DW_AT_ranges). If NEED_PC is set, then this function will set
5520 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
5521 and record the covered ranges in the addrmap. */
5524 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
5525 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5527 struct partial_die_info
*pdi
;
5529 /* Now, march along the PDI's, descending into ones which have
5530 interesting children but skipping the children of the other ones,
5531 until we reach the end of the compilation unit. */
5537 fixup_partial_die (pdi
, cu
);
5539 /* Anonymous namespaces or modules have no name but have interesting
5540 children, so we need to look at them. Ditto for anonymous
5543 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
5544 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
5545 || pdi
->tag
== DW_TAG_imported_unit
)
5549 case DW_TAG_subprogram
:
5550 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
5552 case DW_TAG_constant
:
5553 case DW_TAG_variable
:
5554 case DW_TAG_typedef
:
5555 case DW_TAG_union_type
:
5556 if (!pdi
->is_declaration
)
5558 add_partial_symbol (pdi
, cu
);
5561 case DW_TAG_class_type
:
5562 case DW_TAG_interface_type
:
5563 case DW_TAG_structure_type
:
5564 if (!pdi
->is_declaration
)
5566 add_partial_symbol (pdi
, cu
);
5569 case DW_TAG_enumeration_type
:
5570 if (!pdi
->is_declaration
)
5571 add_partial_enumeration (pdi
, cu
);
5573 case DW_TAG_base_type
:
5574 case DW_TAG_subrange_type
:
5575 /* File scope base type definitions are added to the partial
5577 add_partial_symbol (pdi
, cu
);
5579 case DW_TAG_namespace
:
5580 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
5583 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
5585 case DW_TAG_imported_unit
:
5587 struct dwarf2_per_cu_data
*per_cu
;
5589 /* For now we don't handle imported units in type units. */
5590 if (cu
->per_cu
->is_debug_types
)
5592 error (_("Dwarf Error: DW_TAG_imported_unit is not"
5593 " supported in type units [in module %s]"),
5597 per_cu
= dwarf2_find_containing_comp_unit (pdi
->d
.offset
,
5601 /* Go read the partial unit, if needed. */
5602 if (per_cu
->v
.psymtab
== NULL
)
5603 process_psymtab_comp_unit (per_cu
, 1);
5605 VEC_safe_push (dwarf2_per_cu_ptr
,
5606 cu
->per_cu
->s
.imported_symtabs
, per_cu
);
5614 /* If the die has a sibling, skip to the sibling. */
5616 pdi
= pdi
->die_sibling
;
5620 /* Functions used to compute the fully scoped name of a partial DIE.
5622 Normally, this is simple. For C++, the parent DIE's fully scoped
5623 name is concatenated with "::" and the partial DIE's name. For
5624 Java, the same thing occurs except that "." is used instead of "::".
5625 Enumerators are an exception; they use the scope of their parent
5626 enumeration type, i.e. the name of the enumeration type is not
5627 prepended to the enumerator.
5629 There are two complexities. One is DW_AT_specification; in this
5630 case "parent" means the parent of the target of the specification,
5631 instead of the direct parent of the DIE. The other is compilers
5632 which do not emit DW_TAG_namespace; in this case we try to guess
5633 the fully qualified name of structure types from their members'
5634 linkage names. This must be done using the DIE's children rather
5635 than the children of any DW_AT_specification target. We only need
5636 to do this for structures at the top level, i.e. if the target of
5637 any DW_AT_specification (if any; otherwise the DIE itself) does not
5640 /* Compute the scope prefix associated with PDI's parent, in
5641 compilation unit CU. The result will be allocated on CU's
5642 comp_unit_obstack, or a copy of the already allocated PDI->NAME
5643 field. NULL is returned if no prefix is necessary. */
5645 partial_die_parent_scope (struct partial_die_info
*pdi
,
5646 struct dwarf2_cu
*cu
)
5648 char *grandparent_scope
;
5649 struct partial_die_info
*parent
, *real_pdi
;
5651 /* We need to look at our parent DIE; if we have a DW_AT_specification,
5652 then this means the parent of the specification DIE. */
5655 while (real_pdi
->has_specification
)
5656 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
5657 real_pdi
->spec_is_dwz
, cu
);
5659 parent
= real_pdi
->die_parent
;
5663 if (parent
->scope_set
)
5664 return parent
->scope
;
5666 fixup_partial_die (parent
, cu
);
5668 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
5670 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
5671 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
5672 Work around this problem here. */
5673 if (cu
->language
== language_cplus
5674 && parent
->tag
== DW_TAG_namespace
5675 && strcmp (parent
->name
, "::") == 0
5676 && grandparent_scope
== NULL
)
5678 parent
->scope
= NULL
;
5679 parent
->scope_set
= 1;
5683 if (pdi
->tag
== DW_TAG_enumerator
)
5684 /* Enumerators should not get the name of the enumeration as a prefix. */
5685 parent
->scope
= grandparent_scope
;
5686 else if (parent
->tag
== DW_TAG_namespace
5687 || parent
->tag
== DW_TAG_module
5688 || parent
->tag
== DW_TAG_structure_type
5689 || parent
->tag
== DW_TAG_class_type
5690 || parent
->tag
== DW_TAG_interface_type
5691 || parent
->tag
== DW_TAG_union_type
5692 || parent
->tag
== DW_TAG_enumeration_type
)
5694 if (grandparent_scope
== NULL
)
5695 parent
->scope
= parent
->name
;
5697 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
5699 parent
->name
, 0, cu
);
5703 /* FIXME drow/2004-04-01: What should we be doing with
5704 function-local names? For partial symbols, we should probably be
5706 complaint (&symfile_complaints
,
5707 _("unhandled containing DIE tag %d for DIE at %d"),
5708 parent
->tag
, pdi
->offset
.sect_off
);
5709 parent
->scope
= grandparent_scope
;
5712 parent
->scope_set
= 1;
5713 return parent
->scope
;
5716 /* Return the fully scoped name associated with PDI, from compilation unit
5717 CU. The result will be allocated with malloc. */
5720 partial_die_full_name (struct partial_die_info
*pdi
,
5721 struct dwarf2_cu
*cu
)
5725 /* If this is a template instantiation, we can not work out the
5726 template arguments from partial DIEs. So, unfortunately, we have
5727 to go through the full DIEs. At least any work we do building
5728 types here will be reused if full symbols are loaded later. */
5729 if (pdi
->has_template_arguments
)
5731 fixup_partial_die (pdi
, cu
);
5733 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
5735 struct die_info
*die
;
5736 struct attribute attr
;
5737 struct dwarf2_cu
*ref_cu
= cu
;
5739 /* DW_FORM_ref_addr is using section offset. */
5741 attr
.form
= DW_FORM_ref_addr
;
5742 attr
.u
.unsnd
= pdi
->offset
.sect_off
;
5743 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
5745 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
5749 parent_scope
= partial_die_parent_scope (pdi
, cu
);
5750 if (parent_scope
== NULL
)
5753 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
5757 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
5759 struct objfile
*objfile
= cu
->objfile
;
5761 char *actual_name
= NULL
;
5763 int built_actual_name
= 0;
5765 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5767 actual_name
= partial_die_full_name (pdi
, cu
);
5769 built_actual_name
= 1;
5771 if (actual_name
== NULL
)
5772 actual_name
= pdi
->name
;
5776 case DW_TAG_subprogram
:
5777 if (pdi
->is_external
|| cu
->language
== language_ada
)
5779 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
5780 of the global scope. But in Ada, we want to be able to access
5781 nested procedures globally. So all Ada subprograms are stored
5782 in the global scope. */
5783 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5784 mst_text, objfile); */
5785 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5787 VAR_DOMAIN
, LOC_BLOCK
,
5788 &objfile
->global_psymbols
,
5789 0, pdi
->lowpc
+ baseaddr
,
5790 cu
->language
, objfile
);
5794 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
5795 mst_file_text, objfile); */
5796 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5798 VAR_DOMAIN
, LOC_BLOCK
,
5799 &objfile
->static_psymbols
,
5800 0, pdi
->lowpc
+ baseaddr
,
5801 cu
->language
, objfile
);
5804 case DW_TAG_constant
:
5806 struct psymbol_allocation_list
*list
;
5808 if (pdi
->is_external
)
5809 list
= &objfile
->global_psymbols
;
5811 list
= &objfile
->static_psymbols
;
5812 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5813 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
5814 list
, 0, 0, cu
->language
, objfile
);
5817 case DW_TAG_variable
:
5819 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
5823 && !dwarf2_per_objfile
->has_section_at_zero
)
5825 /* A global or static variable may also have been stripped
5826 out by the linker if unused, in which case its address
5827 will be nullified; do not add such variables into partial
5828 symbol table then. */
5830 else if (pdi
->is_external
)
5833 Don't enter into the minimal symbol tables as there is
5834 a minimal symbol table entry from the ELF symbols already.
5835 Enter into partial symbol table if it has a location
5836 descriptor or a type.
5837 If the location descriptor is missing, new_symbol will create
5838 a LOC_UNRESOLVED symbol, the address of the variable will then
5839 be determined from the minimal symbol table whenever the variable
5841 The address for the partial symbol table entry is not
5842 used by GDB, but it comes in handy for debugging partial symbol
5845 if (pdi
->d
.locdesc
|| pdi
->has_type
)
5846 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5848 VAR_DOMAIN
, LOC_STATIC
,
5849 &objfile
->global_psymbols
,
5851 cu
->language
, objfile
);
5855 /* Static Variable. Skip symbols without location descriptors. */
5856 if (pdi
->d
.locdesc
== NULL
)
5858 if (built_actual_name
)
5859 xfree (actual_name
);
5862 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
5863 mst_file_data, objfile); */
5864 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5866 VAR_DOMAIN
, LOC_STATIC
,
5867 &objfile
->static_psymbols
,
5869 cu
->language
, objfile
);
5872 case DW_TAG_typedef
:
5873 case DW_TAG_base_type
:
5874 case DW_TAG_subrange_type
:
5875 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5877 VAR_DOMAIN
, LOC_TYPEDEF
,
5878 &objfile
->static_psymbols
,
5879 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5881 case DW_TAG_namespace
:
5882 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5884 VAR_DOMAIN
, LOC_TYPEDEF
,
5885 &objfile
->global_psymbols
,
5886 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5888 case DW_TAG_class_type
:
5889 case DW_TAG_interface_type
:
5890 case DW_TAG_structure_type
:
5891 case DW_TAG_union_type
:
5892 case DW_TAG_enumeration_type
:
5893 /* Skip external references. The DWARF standard says in the section
5894 about "Structure, Union, and Class Type Entries": "An incomplete
5895 structure, union or class type is represented by a structure,
5896 union or class entry that does not have a byte size attribute
5897 and that has a DW_AT_declaration attribute." */
5898 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
5900 if (built_actual_name
)
5901 xfree (actual_name
);
5905 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
5906 static vs. global. */
5907 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5909 STRUCT_DOMAIN
, LOC_TYPEDEF
,
5910 (cu
->language
== language_cplus
5911 || cu
->language
== language_java
)
5912 ? &objfile
->global_psymbols
5913 : &objfile
->static_psymbols
,
5914 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5917 case DW_TAG_enumerator
:
5918 add_psymbol_to_list (actual_name
, strlen (actual_name
),
5920 VAR_DOMAIN
, LOC_CONST
,
5921 (cu
->language
== language_cplus
5922 || cu
->language
== language_java
)
5923 ? &objfile
->global_psymbols
5924 : &objfile
->static_psymbols
,
5925 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
5931 if (built_actual_name
)
5932 xfree (actual_name
);
5935 /* Read a partial die corresponding to a namespace; also, add a symbol
5936 corresponding to that namespace to the symbol table. NAMESPACE is
5937 the name of the enclosing namespace. */
5940 add_partial_namespace (struct partial_die_info
*pdi
,
5941 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5942 int need_pc
, struct dwarf2_cu
*cu
)
5944 /* Add a symbol for the namespace. */
5946 add_partial_symbol (pdi
, cu
);
5948 /* Now scan partial symbols in that namespace. */
5950 if (pdi
->has_children
)
5951 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
5954 /* Read a partial die corresponding to a Fortran module. */
5957 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
5958 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
5960 /* Now scan partial symbols in that module. */
5962 if (pdi
->has_children
)
5963 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
5966 /* Read a partial die corresponding to a subprogram and create a partial
5967 symbol for that subprogram. When the CU language allows it, this
5968 routine also defines a partial symbol for each nested subprogram
5969 that this subprogram contains.
5971 DIE my also be a lexical block, in which case we simply search
5972 recursively for suprograms defined inside that lexical block.
5973 Again, this is only performed when the CU language allows this
5974 type of definitions. */
5977 add_partial_subprogram (struct partial_die_info
*pdi
,
5978 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5979 int need_pc
, struct dwarf2_cu
*cu
)
5981 if (pdi
->tag
== DW_TAG_subprogram
)
5983 if (pdi
->has_pc_info
)
5985 if (pdi
->lowpc
< *lowpc
)
5986 *lowpc
= pdi
->lowpc
;
5987 if (pdi
->highpc
> *highpc
)
5988 *highpc
= pdi
->highpc
;
5992 struct objfile
*objfile
= cu
->objfile
;
5994 baseaddr
= ANOFFSET (objfile
->section_offsets
,
5995 SECT_OFF_TEXT (objfile
));
5996 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5997 pdi
->lowpc
+ baseaddr
,
5998 pdi
->highpc
- 1 + baseaddr
,
5999 cu
->per_cu
->v
.psymtab
);
6003 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
6005 if (!pdi
->is_declaration
)
6006 /* Ignore subprogram DIEs that do not have a name, they are
6007 illegal. Do not emit a complaint at this point, we will
6008 do so when we convert this psymtab into a symtab. */
6010 add_partial_symbol (pdi
, cu
);
6014 if (! pdi
->has_children
)
6017 if (cu
->language
== language_ada
)
6019 pdi
= pdi
->die_child
;
6022 fixup_partial_die (pdi
, cu
);
6023 if (pdi
->tag
== DW_TAG_subprogram
6024 || pdi
->tag
== DW_TAG_lexical_block
)
6025 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
6026 pdi
= pdi
->die_sibling
;
6031 /* Read a partial die corresponding to an enumeration type. */
6034 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
6035 struct dwarf2_cu
*cu
)
6037 struct partial_die_info
*pdi
;
6039 if (enum_pdi
->name
!= NULL
)
6040 add_partial_symbol (enum_pdi
, cu
);
6042 pdi
= enum_pdi
->die_child
;
6045 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
6046 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6048 add_partial_symbol (pdi
, cu
);
6049 pdi
= pdi
->die_sibling
;
6053 /* Return the initial uleb128 in the die at INFO_PTR. */
6056 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
6058 unsigned int bytes_read
;
6060 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6063 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
6064 Return the corresponding abbrev, or NULL if the number is zero (indicating
6065 an empty DIE). In either case *BYTES_READ will be set to the length of
6066 the initial number. */
6068 static struct abbrev_info
*
6069 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
6070 struct dwarf2_cu
*cu
)
6072 bfd
*abfd
= cu
->objfile
->obfd
;
6073 unsigned int abbrev_number
;
6074 struct abbrev_info
*abbrev
;
6076 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
6078 if (abbrev_number
== 0)
6081 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
6084 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
6085 abbrev_number
, bfd_get_filename (abfd
));
6091 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6092 Returns a pointer to the end of a series of DIEs, terminated by an empty
6093 DIE. Any children of the skipped DIEs will also be skipped. */
6096 skip_children (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
)
6098 struct dwarf2_cu
*cu
= reader
->cu
;
6099 struct abbrev_info
*abbrev
;
6100 unsigned int bytes_read
;
6104 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6106 return info_ptr
+ bytes_read
;
6108 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
6112 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
6113 INFO_PTR should point just after the initial uleb128 of a DIE, and the
6114 abbrev corresponding to that skipped uleb128 should be passed in
6115 ABBREV. Returns a pointer to this DIE's sibling, skipping any
6119 skip_one_die (const struct die_reader_specs
*reader
, gdb_byte
*info_ptr
,
6120 struct abbrev_info
*abbrev
)
6122 unsigned int bytes_read
;
6123 struct attribute attr
;
6124 bfd
*abfd
= reader
->abfd
;
6125 struct dwarf2_cu
*cu
= reader
->cu
;
6126 gdb_byte
*buffer
= reader
->buffer
;
6127 const gdb_byte
*buffer_end
= reader
->buffer_end
;
6128 gdb_byte
*start_info_ptr
= info_ptr
;
6129 unsigned int form
, i
;
6131 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
6133 /* The only abbrev we care about is DW_AT_sibling. */
6134 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
6136 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
6137 if (attr
.form
== DW_FORM_ref_addr
)
6138 complaint (&symfile_complaints
,
6139 _("ignoring absolute DW_AT_sibling"));
6141 return buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
6144 /* If it isn't DW_AT_sibling, skip this attribute. */
6145 form
= abbrev
->attrs
[i
].form
;
6149 case DW_FORM_ref_addr
:
6150 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
6151 and later it is offset sized. */
6152 if (cu
->header
.version
== 2)
6153 info_ptr
+= cu
->header
.addr_size
;
6155 info_ptr
+= cu
->header
.offset_size
;
6157 case DW_FORM_GNU_ref_alt
:
6158 info_ptr
+= cu
->header
.offset_size
;
6161 info_ptr
+= cu
->header
.addr_size
;
6168 case DW_FORM_flag_present
:
6180 case DW_FORM_ref_sig8
:
6183 case DW_FORM_string
:
6184 read_direct_string (abfd
, info_ptr
, &bytes_read
);
6185 info_ptr
+= bytes_read
;
6187 case DW_FORM_sec_offset
:
6189 case DW_FORM_GNU_strp_alt
:
6190 info_ptr
+= cu
->header
.offset_size
;
6192 case DW_FORM_exprloc
:
6194 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6195 info_ptr
+= bytes_read
;
6197 case DW_FORM_block1
:
6198 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
6200 case DW_FORM_block2
:
6201 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
6203 case DW_FORM_block4
:
6204 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
6208 case DW_FORM_ref_udata
:
6209 case DW_FORM_GNU_addr_index
:
6210 case DW_FORM_GNU_str_index
:
6211 info_ptr
= (gdb_byte
*) safe_skip_leb128 (info_ptr
, buffer_end
);
6213 case DW_FORM_indirect
:
6214 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6215 info_ptr
+= bytes_read
;
6216 /* We need to continue parsing from here, so just go back to
6218 goto skip_attribute
;
6221 error (_("Dwarf Error: Cannot handle %s "
6222 "in DWARF reader [in module %s]"),
6223 dwarf_form_name (form
),
6224 bfd_get_filename (abfd
));
6228 if (abbrev
->has_children
)
6229 return skip_children (reader
, info_ptr
);
6234 /* Locate ORIG_PDI's sibling.
6235 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
6238 locate_pdi_sibling (const struct die_reader_specs
*reader
,
6239 struct partial_die_info
*orig_pdi
,
6242 /* Do we know the sibling already? */
6244 if (orig_pdi
->sibling
)
6245 return orig_pdi
->sibling
;
6247 /* Are there any children to deal with? */
6249 if (!orig_pdi
->has_children
)
6252 /* Skip the children the long way. */
6254 return skip_children (reader
, info_ptr
);
6257 /* Expand this partial symbol table into a full symbol table. */
6260 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
6266 warning (_("bug: psymtab for %s is already read in."),
6273 printf_filtered (_("Reading in symbols for %s..."),
6275 gdb_flush (gdb_stdout
);
6278 /* Restore our global data. */
6279 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
6280 dwarf2_objfile_data_key
);
6282 /* If this psymtab is constructed from a debug-only objfile, the
6283 has_section_at_zero flag will not necessarily be correct. We
6284 can get the correct value for this flag by looking at the data
6285 associated with the (presumably stripped) associated objfile. */
6286 if (pst
->objfile
->separate_debug_objfile_backlink
)
6288 struct dwarf2_per_objfile
*dpo_backlink
6289 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
6290 dwarf2_objfile_data_key
);
6292 dwarf2_per_objfile
->has_section_at_zero
6293 = dpo_backlink
->has_section_at_zero
;
6296 dwarf2_per_objfile
->reading_partial_symbols
= 0;
6298 psymtab_to_symtab_1 (pst
);
6300 /* Finish up the debug error message. */
6302 printf_filtered (_("done.\n"));
6306 process_cu_includes ();
6309 /* Reading in full CUs. */
6311 /* Add PER_CU to the queue. */
6314 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6315 enum language pretend_language
)
6317 struct dwarf2_queue_item
*item
;
6320 item
= xmalloc (sizeof (*item
));
6321 item
->per_cu
= per_cu
;
6322 item
->pretend_language
= pretend_language
;
6325 if (dwarf2_queue
== NULL
)
6326 dwarf2_queue
= item
;
6328 dwarf2_queue_tail
->next
= item
;
6330 dwarf2_queue_tail
= item
;
6333 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
6334 unit and add it to our queue.
6335 The result is non-zero if PER_CU was queued, otherwise the result is zero
6336 meaning either PER_CU is already queued or it is already loaded. */
6339 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
6340 struct dwarf2_per_cu_data
*per_cu
,
6341 enum language pretend_language
)
6343 /* We may arrive here during partial symbol reading, if we need full
6344 DIEs to process an unusual case (e.g. template arguments). Do
6345 not queue PER_CU, just tell our caller to load its DIEs. */
6346 if (dwarf2_per_objfile
->reading_partial_symbols
)
6348 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
6353 /* Mark the dependence relation so that we don't flush PER_CU
6355 dwarf2_add_dependence (this_cu
, per_cu
);
6357 /* If it's already on the queue, we have nothing to do. */
6361 /* If the compilation unit is already loaded, just mark it as
6363 if (per_cu
->cu
!= NULL
)
6365 per_cu
->cu
->last_used
= 0;
6369 /* Add it to the queue. */
6370 queue_comp_unit (per_cu
, pretend_language
);
6375 /* Process the queue. */
6378 process_queue (void)
6380 struct dwarf2_queue_item
*item
, *next_item
;
6382 if (dwarf2_read_debug
)
6384 fprintf_unfiltered (gdb_stdlog
,
6385 "Expanding one or more symtabs of objfile %s ...\n",
6386 dwarf2_per_objfile
->objfile
->name
);
6389 /* The queue starts out with one item, but following a DIE reference
6390 may load a new CU, adding it to the end of the queue. */
6391 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
6393 if (dwarf2_per_objfile
->using_index
6394 ? !item
->per_cu
->v
.quick
->symtab
6395 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
6397 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
6399 if (dwarf2_read_debug
)
6401 fprintf_unfiltered (gdb_stdlog
,
6402 "Expanding symtab of %s at offset 0x%x\n",
6403 per_cu
->is_debug_types
? "TU" : "CU",
6404 per_cu
->offset
.sect_off
);
6407 if (per_cu
->is_debug_types
)
6408 process_full_type_unit (per_cu
, item
->pretend_language
);
6410 process_full_comp_unit (per_cu
, item
->pretend_language
);
6412 if (dwarf2_read_debug
)
6414 fprintf_unfiltered (gdb_stdlog
,
6415 "Done expanding %s at offset 0x%x\n",
6416 per_cu
->is_debug_types
? "TU" : "CU",
6417 per_cu
->offset
.sect_off
);
6421 item
->per_cu
->queued
= 0;
6422 next_item
= item
->next
;
6426 dwarf2_queue_tail
= NULL
;
6428 if (dwarf2_read_debug
)
6430 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
6431 dwarf2_per_objfile
->objfile
->name
);
6435 /* Free all allocated queue entries. This function only releases anything if
6436 an error was thrown; if the queue was processed then it would have been
6437 freed as we went along. */
6440 dwarf2_release_queue (void *dummy
)
6442 struct dwarf2_queue_item
*item
, *last
;
6444 item
= dwarf2_queue
;
6447 /* Anything still marked queued is likely to be in an
6448 inconsistent state, so discard it. */
6449 if (item
->per_cu
->queued
)
6451 if (item
->per_cu
->cu
!= NULL
)
6452 free_one_cached_comp_unit (item
->per_cu
);
6453 item
->per_cu
->queued
= 0;
6461 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
6464 /* Read in full symbols for PST, and anything it depends on. */
6467 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
6469 struct dwarf2_per_cu_data
*per_cu
;
6475 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
6476 if (!pst
->dependencies
[i
]->readin
6477 && pst
->dependencies
[i
]->user
== NULL
)
6479 /* Inform about additional files that need to be read in. */
6482 /* FIXME: i18n: Need to make this a single string. */
6483 fputs_filtered (" ", gdb_stdout
);
6485 fputs_filtered ("and ", gdb_stdout
);
6487 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
6488 wrap_here (""); /* Flush output. */
6489 gdb_flush (gdb_stdout
);
6491 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
6494 per_cu
= pst
->read_symtab_private
;
6498 /* It's an include file, no symbols to read for it.
6499 Everything is in the parent symtab. */
6504 dw2_do_instantiate_symtab (per_cu
);
6507 /* Trivial hash function for die_info: the hash value of a DIE
6508 is its offset in .debug_info for this objfile. */
6511 die_hash (const void *item
)
6513 const struct die_info
*die
= item
;
6515 return die
->offset
.sect_off
;
6518 /* Trivial comparison function for die_info structures: two DIEs
6519 are equal if they have the same offset. */
6522 die_eq (const void *item_lhs
, const void *item_rhs
)
6524 const struct die_info
*die_lhs
= item_lhs
;
6525 const struct die_info
*die_rhs
= item_rhs
;
6527 return die_lhs
->offset
.sect_off
== die_rhs
->offset
.sect_off
;
6530 /* die_reader_func for load_full_comp_unit.
6531 This is identical to read_signatured_type_reader,
6532 but is kept separate for now. */
6535 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
6537 struct die_info
*comp_unit_die
,
6541 struct dwarf2_cu
*cu
= reader
->cu
;
6542 enum language
*language_ptr
= data
;
6544 gdb_assert (cu
->die_hash
== NULL
);
6546 htab_create_alloc_ex (cu
->header
.length
/ 12,
6550 &cu
->comp_unit_obstack
,
6551 hashtab_obstack_allocate
,
6552 dummy_obstack_deallocate
);
6555 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
6556 &info_ptr
, comp_unit_die
);
6557 cu
->dies
= comp_unit_die
;
6558 /* comp_unit_die is not stored in die_hash, no need. */
6560 /* We try not to read any attributes in this function, because not
6561 all CUs needed for references have been loaded yet, and symbol
6562 table processing isn't initialized. But we have to set the CU language,
6563 or we won't be able to build types correctly.
6564 Similarly, if we do not read the producer, we can not apply
6565 producer-specific interpretation. */
6566 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
6569 /* Load the DIEs associated with PER_CU into memory. */
6572 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
6573 enum language pretend_language
)
6575 gdb_assert (! this_cu
->is_debug_types
);
6577 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
6578 load_full_comp_unit_reader
, &pretend_language
);
6581 /* Add a DIE to the delayed physname list. */
6584 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
6585 const char *name
, struct die_info
*die
,
6586 struct dwarf2_cu
*cu
)
6588 struct delayed_method_info mi
;
6590 mi
.fnfield_index
= fnfield_index
;
6594 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
6597 /* A cleanup for freeing the delayed method list. */
6600 free_delayed_list (void *ptr
)
6602 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
6603 if (cu
->method_list
!= NULL
)
6605 VEC_free (delayed_method_info
, cu
->method_list
);
6606 cu
->method_list
= NULL
;
6610 /* Compute the physnames of any methods on the CU's method list.
6612 The computation of method physnames is delayed in order to avoid the
6613 (bad) condition that one of the method's formal parameters is of an as yet
6617 compute_delayed_physnames (struct dwarf2_cu
*cu
)
6620 struct delayed_method_info
*mi
;
6621 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
6623 const char *physname
;
6624 struct fn_fieldlist
*fn_flp
6625 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
6626 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
6627 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
6631 /* Go objects should be embedded in a DW_TAG_module DIE,
6632 and it's not clear if/how imported objects will appear.
6633 To keep Go support simple until that's worked out,
6634 go back through what we've read and create something usable.
6635 We could do this while processing each DIE, and feels kinda cleaner,
6636 but that way is more invasive.
6637 This is to, for example, allow the user to type "p var" or "b main"
6638 without having to specify the package name, and allow lookups
6639 of module.object to work in contexts that use the expression
6643 fixup_go_packaging (struct dwarf2_cu
*cu
)
6645 char *package_name
= NULL
;
6646 struct pending
*list
;
6649 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
6651 for (i
= 0; i
< list
->nsyms
; ++i
)
6653 struct symbol
*sym
= list
->symbol
[i
];
6655 if (SYMBOL_LANGUAGE (sym
) == language_go
6656 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
6658 char *this_package_name
= go_symbol_package_name (sym
);
6660 if (this_package_name
== NULL
)
6662 if (package_name
== NULL
)
6663 package_name
= this_package_name
;
6666 if (strcmp (package_name
, this_package_name
) != 0)
6667 complaint (&symfile_complaints
,
6668 _("Symtab %s has objects from two different Go packages: %s and %s"),
6669 (sym
->symtab
&& sym
->symtab
->filename
6670 ? sym
->symtab
->filename
6671 : cu
->objfile
->name
),
6672 this_package_name
, package_name
);
6673 xfree (this_package_name
);
6679 if (package_name
!= NULL
)
6681 struct objfile
*objfile
= cu
->objfile
;
6682 struct type
*type
= init_type (TYPE_CODE_MODULE
, 0, 0,
6683 package_name
, objfile
);
6686 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
6688 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6689 SYMBOL_SET_LANGUAGE (sym
, language_go
);
6690 SYMBOL_SET_NAMES (sym
, package_name
, strlen (package_name
), 1, objfile
);
6691 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
6692 e.g., "main" finds the "main" module and not C's main(). */
6693 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
6694 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
6695 SYMBOL_TYPE (sym
) = type
;
6697 add_symbol_to_list (sym
, &global_symbols
);
6699 xfree (package_name
);
6703 static void compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
);
6705 /* Return the symtab for PER_CU. This works properly regardless of
6706 whether we're using the index or psymtabs. */
6708 static struct symtab
*
6709 get_symtab (struct dwarf2_per_cu_data
*per_cu
)
6711 return (dwarf2_per_objfile
->using_index
6712 ? per_cu
->v
.quick
->symtab
6713 : per_cu
->v
.psymtab
->symtab
);
6716 /* A helper function for computing the list of all symbol tables
6717 included by PER_CU. */
6720 recursively_compute_inclusions (VEC (dwarf2_per_cu_ptr
) **result
,
6721 htab_t all_children
,
6722 struct dwarf2_per_cu_data
*per_cu
)
6726 struct dwarf2_per_cu_data
*iter
;
6728 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
6731 /* This inclusion and its children have been processed. */
6736 /* Only add a CU if it has a symbol table. */
6737 if (get_symtab (per_cu
) != NULL
)
6738 VEC_safe_push (dwarf2_per_cu_ptr
, *result
, per_cu
);
6741 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
, ix
, iter
);
6743 recursively_compute_inclusions (result
, all_children
, iter
);
6746 /* Compute the symtab 'includes' fields for the symtab related to
6750 compute_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
6752 gdb_assert (! per_cu
->is_debug_types
);
6754 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
))
6757 struct dwarf2_per_cu_data
*iter
;
6758 VEC (dwarf2_per_cu_ptr
) *result_children
= NULL
;
6759 htab_t all_children
;
6760 struct symtab
*symtab
= get_symtab (per_cu
);
6762 /* If we don't have a symtab, we can just skip this case. */
6766 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
6767 NULL
, xcalloc
, xfree
);
6770 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->s
.imported_symtabs
,
6773 recursively_compute_inclusions (&result_children
, all_children
, iter
);
6775 /* Now we have a transitive closure of all the included CUs, so
6776 we can convert it to a list of symtabs. */
6777 len
= VEC_length (dwarf2_per_cu_ptr
, result_children
);
6779 = obstack_alloc (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
6780 (len
+ 1) * sizeof (struct symtab
*));
6782 VEC_iterate (dwarf2_per_cu_ptr
, result_children
, ix
, iter
);
6784 symtab
->includes
[ix
] = get_symtab (iter
);
6785 symtab
->includes
[len
] = NULL
;
6787 VEC_free (dwarf2_per_cu_ptr
, result_children
);
6788 htab_delete (all_children
);
6792 /* Compute the 'includes' field for the symtabs of all the CUs we just
6796 process_cu_includes (void)
6799 struct dwarf2_per_cu_data
*iter
;
6802 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
6806 if (! iter
->is_debug_types
)
6807 compute_symtab_includes (iter
);
6810 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
6813 /* Generate full symbol information for PER_CU, whose DIEs have
6814 already been loaded into memory. */
6817 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
6818 enum language pretend_language
)
6820 struct dwarf2_cu
*cu
= per_cu
->cu
;
6821 struct objfile
*objfile
= per_cu
->objfile
;
6822 CORE_ADDR lowpc
, highpc
;
6823 struct symtab
*symtab
;
6824 struct cleanup
*back_to
, *delayed_list_cleanup
;
6826 struct block
*static_block
;
6828 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6831 back_to
= make_cleanup (really_free_pendings
, NULL
);
6832 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6834 cu
->list_in_scope
= &file_symbols
;
6836 cu
->language
= pretend_language
;
6837 cu
->language_defn
= language_def (cu
->language
);
6839 /* Do line number decoding in read_file_scope () */
6840 process_die (cu
->dies
, cu
);
6842 /* For now fudge the Go package. */
6843 if (cu
->language
== language_go
)
6844 fixup_go_packaging (cu
);
6846 /* Now that we have processed all the DIEs in the CU, all the types
6847 should be complete, and it should now be safe to compute all of the
6849 compute_delayed_physnames (cu
);
6850 do_cleanups (delayed_list_cleanup
);
6852 /* Some compilers don't define a DW_AT_high_pc attribute for the
6853 compilation unit. If the DW_AT_high_pc is missing, synthesize
6854 it, by scanning the DIE's below the compilation unit. */
6855 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
6858 = end_symtab_get_static_block (highpc
+ baseaddr
, objfile
, 0,
6859 per_cu
->s
.imported_symtabs
!= NULL
);
6861 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
6862 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
6863 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
6864 addrmap to help ensure it has an accurate map of pc values belonging to
6866 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
6868 symtab
= end_symtab_from_static_block (static_block
, objfile
,
6869 SECT_OFF_TEXT (objfile
), 0);
6873 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
6875 /* Set symtab language to language from DW_AT_language. If the
6876 compilation is from a C file generated by language preprocessors, do
6877 not set the language if it was already deduced by start_subfile. */
6878 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
6879 symtab
->language
= cu
->language
;
6881 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
6882 produce DW_AT_location with location lists but it can be possibly
6883 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
6884 there were bugs in prologue debug info, fixed later in GCC-4.5
6885 by "unwind info for epilogues" patch (which is not directly related).
6887 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
6888 needed, it would be wrong due to missing DW_AT_producer there.
6890 Still one can confuse GDB by using non-standard GCC compilation
6891 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
6893 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
6894 symtab
->locations_valid
= 1;
6896 if (gcc_4_minor
>= 5)
6897 symtab
->epilogue_unwind_valid
= 1;
6899 symtab
->call_site_htab
= cu
->call_site_htab
;
6902 if (dwarf2_per_objfile
->using_index
)
6903 per_cu
->v
.quick
->symtab
= symtab
;
6906 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6907 pst
->symtab
= symtab
;
6911 /* Push it for inclusion processing later. */
6912 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
6914 do_cleanups (back_to
);
6917 /* Generate full symbol information for type unit PER_CU, whose DIEs have
6918 already been loaded into memory. */
6921 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
6922 enum language pretend_language
)
6924 struct dwarf2_cu
*cu
= per_cu
->cu
;
6925 struct objfile
*objfile
= per_cu
->objfile
;
6926 struct symtab
*symtab
;
6927 struct cleanup
*back_to
, *delayed_list_cleanup
;
6930 back_to
= make_cleanup (really_free_pendings
, NULL
);
6931 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
6933 cu
->list_in_scope
= &file_symbols
;
6935 cu
->language
= pretend_language
;
6936 cu
->language_defn
= language_def (cu
->language
);
6938 /* The symbol tables are set up in read_type_unit_scope. */
6939 process_die (cu
->dies
, cu
);
6941 /* For now fudge the Go package. */
6942 if (cu
->language
== language_go
)
6943 fixup_go_packaging (cu
);
6945 /* Now that we have processed all the DIEs in the CU, all the types
6946 should be complete, and it should now be safe to compute all of the
6948 compute_delayed_physnames (cu
);
6949 do_cleanups (delayed_list_cleanup
);
6951 /* TUs share symbol tables.
6952 If this is the first TU to use this symtab, complete the construction
6953 of it with end_expandable_symtab. Otherwise, complete the addition of
6954 this TU's symbols to the existing symtab. */
6955 if (per_cu
->s
.type_unit_group
->primary_symtab
== NULL
)
6957 symtab
= end_expandable_symtab (0, objfile
, SECT_OFF_TEXT (objfile
));
6958 per_cu
->s
.type_unit_group
->primary_symtab
= symtab
;
6962 /* Set symtab language to language from DW_AT_language. If the
6963 compilation is from a C file generated by language preprocessors,
6964 do not set the language if it was already deduced by
6966 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
6967 symtab
->language
= cu
->language
;
6972 augment_type_symtab (objfile
,
6973 per_cu
->s
.type_unit_group
->primary_symtab
);
6974 symtab
= per_cu
->s
.type_unit_group
->primary_symtab
;
6977 if (dwarf2_per_objfile
->using_index
)
6978 per_cu
->v
.quick
->symtab
= symtab
;
6981 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
6982 pst
->symtab
= symtab
;
6986 do_cleanups (back_to
);
6989 /* Process an imported unit DIE. */
6992 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
6994 struct attribute
*attr
;
6996 /* For now we don't handle imported units in type units. */
6997 if (cu
->per_cu
->is_debug_types
)
6999 error (_("Dwarf Error: DW_TAG_imported_unit is not"
7000 " supported in type units [in module %s]"),
7004 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7007 struct dwarf2_per_cu_data
*per_cu
;
7008 struct symtab
*imported_symtab
;
7012 offset
= dwarf2_get_ref_die_offset (attr
);
7013 is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
7014 per_cu
= dwarf2_find_containing_comp_unit (offset
, is_dwz
, cu
->objfile
);
7016 /* Queue the unit, if needed. */
7017 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
7018 load_full_comp_unit (per_cu
, cu
->language
);
7020 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->s
.imported_symtabs
,
7025 /* Process a die and its children. */
7028 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7032 case DW_TAG_padding
:
7034 case DW_TAG_compile_unit
:
7035 case DW_TAG_partial_unit
:
7036 read_file_scope (die
, cu
);
7038 case DW_TAG_type_unit
:
7039 read_type_unit_scope (die
, cu
);
7041 case DW_TAG_subprogram
:
7042 case DW_TAG_inlined_subroutine
:
7043 read_func_scope (die
, cu
);
7045 case DW_TAG_lexical_block
:
7046 case DW_TAG_try_block
:
7047 case DW_TAG_catch_block
:
7048 read_lexical_block_scope (die
, cu
);
7050 case DW_TAG_GNU_call_site
:
7051 read_call_site_scope (die
, cu
);
7053 case DW_TAG_class_type
:
7054 case DW_TAG_interface_type
:
7055 case DW_TAG_structure_type
:
7056 case DW_TAG_union_type
:
7057 process_structure_scope (die
, cu
);
7059 case DW_TAG_enumeration_type
:
7060 process_enumeration_scope (die
, cu
);
7063 /* These dies have a type, but processing them does not create
7064 a symbol or recurse to process the children. Therefore we can
7065 read them on-demand through read_type_die. */
7066 case DW_TAG_subroutine_type
:
7067 case DW_TAG_set_type
:
7068 case DW_TAG_array_type
:
7069 case DW_TAG_pointer_type
:
7070 case DW_TAG_ptr_to_member_type
:
7071 case DW_TAG_reference_type
:
7072 case DW_TAG_string_type
:
7075 case DW_TAG_base_type
:
7076 case DW_TAG_subrange_type
:
7077 case DW_TAG_typedef
:
7078 /* Add a typedef symbol for the type definition, if it has a
7080 new_symbol (die
, read_type_die (die
, cu
), cu
);
7082 case DW_TAG_common_block
:
7083 read_common_block (die
, cu
);
7085 case DW_TAG_common_inclusion
:
7087 case DW_TAG_namespace
:
7088 processing_has_namespace_info
= 1;
7089 read_namespace (die
, cu
);
7092 processing_has_namespace_info
= 1;
7093 read_module (die
, cu
);
7095 case DW_TAG_imported_declaration
:
7096 case DW_TAG_imported_module
:
7097 processing_has_namespace_info
= 1;
7098 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
7099 || cu
->language
!= language_fortran
))
7100 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
7101 dwarf_tag_name (die
->tag
));
7102 read_import_statement (die
, cu
);
7105 case DW_TAG_imported_unit
:
7106 process_imported_unit_die (die
, cu
);
7110 new_symbol (die
, NULL
, cu
);
7115 /* A helper function for dwarf2_compute_name which determines whether DIE
7116 needs to have the name of the scope prepended to the name listed in the
7120 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7122 struct attribute
*attr
;
7126 case DW_TAG_namespace
:
7127 case DW_TAG_typedef
:
7128 case DW_TAG_class_type
:
7129 case DW_TAG_interface_type
:
7130 case DW_TAG_structure_type
:
7131 case DW_TAG_union_type
:
7132 case DW_TAG_enumeration_type
:
7133 case DW_TAG_enumerator
:
7134 case DW_TAG_subprogram
:
7138 case DW_TAG_variable
:
7139 case DW_TAG_constant
:
7140 /* We only need to prefix "globally" visible variables. These include
7141 any variable marked with DW_AT_external or any variable that
7142 lives in a namespace. [Variables in anonymous namespaces
7143 require prefixing, but they are not DW_AT_external.] */
7145 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
7147 struct dwarf2_cu
*spec_cu
= cu
;
7149 return die_needs_namespace (die_specification (die
, &spec_cu
),
7153 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
7154 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
7155 && die
->parent
->tag
!= DW_TAG_module
)
7157 /* A variable in a lexical block of some kind does not need a
7158 namespace, even though in C++ such variables may be external
7159 and have a mangled name. */
7160 if (die
->parent
->tag
== DW_TAG_lexical_block
7161 || die
->parent
->tag
== DW_TAG_try_block
7162 || die
->parent
->tag
== DW_TAG_catch_block
7163 || die
->parent
->tag
== DW_TAG_subprogram
)
7172 /* Retrieve the last character from a mem_file. */
7175 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
7177 char *last_char_p
= (char *) object
;
7180 *last_char_p
= buffer
[length
- 1];
7183 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
7184 compute the physname for the object, which include a method's:
7185 - formal parameters (C++/Java),
7186 - receiver type (Go),
7187 - return type (Java).
7189 The term "physname" is a bit confusing.
7190 For C++, for example, it is the demangled name.
7191 For Go, for example, it's the mangled name.
7193 For Ada, return the DIE's linkage name rather than the fully qualified
7194 name. PHYSNAME is ignored..
7196 The result is allocated on the objfile_obstack and canonicalized. */
7199 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
7202 struct objfile
*objfile
= cu
->objfile
;
7205 name
= dwarf2_name (die
, cu
);
7207 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
7208 compute it by typename_concat inside GDB. */
7209 if (cu
->language
== language_ada
7210 || (cu
->language
== language_fortran
&& physname
))
7212 /* For Ada unit, we prefer the linkage name over the name, as
7213 the former contains the exported name, which the user expects
7214 to be able to reference. Ideally, we want the user to be able
7215 to reference this entity using either natural or linkage name,
7216 but we haven't started looking at this enhancement yet. */
7217 struct attribute
*attr
;
7219 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7221 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7222 if (attr
&& DW_STRING (attr
))
7223 return DW_STRING (attr
);
7226 /* These are the only languages we know how to qualify names in. */
7228 && (cu
->language
== language_cplus
|| cu
->language
== language_java
7229 || cu
->language
== language_fortran
))
7231 if (die_needs_namespace (die
, cu
))
7235 struct ui_file
*buf
;
7237 prefix
= determine_prefix (die
, cu
);
7238 buf
= mem_fileopen ();
7239 if (*prefix
!= '\0')
7241 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
7244 fputs_unfiltered (prefixed_name
, buf
);
7245 xfree (prefixed_name
);
7248 fputs_unfiltered (name
, buf
);
7250 /* Template parameters may be specified in the DIE's DW_AT_name, or
7251 as children with DW_TAG_template_type_param or
7252 DW_TAG_value_type_param. If the latter, add them to the name
7253 here. If the name already has template parameters, then
7254 skip this step; some versions of GCC emit both, and
7255 it is more efficient to use the pre-computed name.
7257 Something to keep in mind about this process: it is very
7258 unlikely, or in some cases downright impossible, to produce
7259 something that will match the mangled name of a function.
7260 If the definition of the function has the same debug info,
7261 we should be able to match up with it anyway. But fallbacks
7262 using the minimal symbol, for instance to find a method
7263 implemented in a stripped copy of libstdc++, will not work.
7264 If we do not have debug info for the definition, we will have to
7265 match them up some other way.
7267 When we do name matching there is a related problem with function
7268 templates; two instantiated function templates are allowed to
7269 differ only by their return types, which we do not add here. */
7271 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
7273 struct attribute
*attr
;
7274 struct die_info
*child
;
7277 die
->building_fullname
= 1;
7279 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
7284 struct dwarf2_locexpr_baton
*baton
;
7287 if (child
->tag
!= DW_TAG_template_type_param
7288 && child
->tag
!= DW_TAG_template_value_param
)
7293 fputs_unfiltered ("<", buf
);
7297 fputs_unfiltered (", ", buf
);
7299 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
7302 complaint (&symfile_complaints
,
7303 _("template parameter missing DW_AT_type"));
7304 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
7307 type
= die_type (child
, cu
);
7309 if (child
->tag
== DW_TAG_template_type_param
)
7311 c_print_type (type
, "", buf
, -1, 0);
7315 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
7318 complaint (&symfile_complaints
,
7319 _("template parameter missing "
7320 "DW_AT_const_value"));
7321 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
7325 dwarf2_const_value_attr (attr
, type
, name
,
7326 &cu
->comp_unit_obstack
, cu
,
7327 &value
, &bytes
, &baton
);
7329 if (TYPE_NOSIGN (type
))
7330 /* GDB prints characters as NUMBER 'CHAR'. If that's
7331 changed, this can use value_print instead. */
7332 c_printchar (value
, type
, buf
);
7335 struct value_print_options opts
;
7338 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
7342 else if (bytes
!= NULL
)
7344 v
= allocate_value (type
);
7345 memcpy (value_contents_writeable (v
), bytes
,
7346 TYPE_LENGTH (type
));
7349 v
= value_from_longest (type
, value
);
7351 /* Specify decimal so that we do not depend on
7353 get_formatted_print_options (&opts
, 'd');
7355 value_print (v
, buf
, &opts
);
7361 die
->building_fullname
= 0;
7365 /* Close the argument list, with a space if necessary
7366 (nested templates). */
7367 char last_char
= '\0';
7368 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
7369 if (last_char
== '>')
7370 fputs_unfiltered (" >", buf
);
7372 fputs_unfiltered (">", buf
);
7376 /* For Java and C++ methods, append formal parameter type
7377 information, if PHYSNAME. */
7379 if (physname
&& die
->tag
== DW_TAG_subprogram
7380 && (cu
->language
== language_cplus
7381 || cu
->language
== language_java
))
7383 struct type
*type
= read_type_die (die
, cu
);
7385 c_type_print_args (type
, buf
, 1, cu
->language
);
7387 if (cu
->language
== language_java
)
7389 /* For java, we must append the return type to method
7391 if (die
->tag
== DW_TAG_subprogram
)
7392 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
7395 else if (cu
->language
== language_cplus
)
7397 /* Assume that an artificial first parameter is
7398 "this", but do not crash if it is not. RealView
7399 marks unnamed (and thus unused) parameters as
7400 artificial; there is no way to differentiate
7402 if (TYPE_NFIELDS (type
) > 0
7403 && TYPE_FIELD_ARTIFICIAL (type
, 0)
7404 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
7405 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
7407 fputs_unfiltered (" const", buf
);
7411 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
7413 ui_file_delete (buf
);
7415 if (cu
->language
== language_cplus
)
7418 = dwarf2_canonicalize_name (name
, cu
,
7419 &objfile
->objfile_obstack
);
7430 /* Return the fully qualified name of DIE, based on its DW_AT_name.
7431 If scope qualifiers are appropriate they will be added. The result
7432 will be allocated on the objfile_obstack, or NULL if the DIE does
7433 not have a name. NAME may either be from a previous call to
7434 dwarf2_name or NULL.
7436 The output string will be canonicalized (if C++/Java). */
7439 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7441 return dwarf2_compute_name (name
, die
, cu
, 0);
7444 /* Construct a physname for the given DIE in CU. NAME may either be
7445 from a previous call to dwarf2_name or NULL. The result will be
7446 allocated on the objfile_objstack or NULL if the DIE does not have a
7449 The output string will be canonicalized (if C++/Java). */
7452 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
7454 struct objfile
*objfile
= cu
->objfile
;
7455 struct attribute
*attr
;
7456 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
7457 struct cleanup
*back_to
;
7460 /* In this case dwarf2_compute_name is just a shortcut not building anything
7462 if (!die_needs_namespace (die
, cu
))
7463 return dwarf2_compute_name (name
, die
, cu
, 1);
7465 back_to
= make_cleanup (null_cleanup
, NULL
);
7467 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
7469 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7471 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
7473 if (attr
&& DW_STRING (attr
))
7477 mangled
= DW_STRING (attr
);
7479 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
7480 type. It is easier for GDB users to search for such functions as
7481 `name(params)' than `long name(params)'. In such case the minimal
7482 symbol names do not match the full symbol names but for template
7483 functions there is never a need to look up their definition from their
7484 declaration so the only disadvantage remains the minimal symbol
7485 variant `long name(params)' does not have the proper inferior type.
7488 if (cu
->language
== language_go
)
7490 /* This is a lie, but we already lie to the caller new_symbol_full.
7491 new_symbol_full assumes we return the mangled name.
7492 This just undoes that lie until things are cleaned up. */
7497 demangled
= cplus_demangle (mangled
,
7498 (DMGL_PARAMS
| DMGL_ANSI
7499 | (cu
->language
== language_java
7500 ? DMGL_JAVA
| DMGL_RET_POSTFIX
7505 make_cleanup (xfree
, demangled
);
7515 if (canon
== NULL
|| check_physname
)
7517 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
7519 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
7521 /* It may not mean a bug in GDB. The compiler could also
7522 compute DW_AT_linkage_name incorrectly. But in such case
7523 GDB would need to be bug-to-bug compatible. */
7525 complaint (&symfile_complaints
,
7526 _("Computed physname <%s> does not match demangled <%s> "
7527 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
7528 physname
, canon
, mangled
, die
->offset
.sect_off
, objfile
->name
);
7530 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
7531 is available here - over computed PHYSNAME. It is safer
7532 against both buggy GDB and buggy compilers. */
7546 retval
= obsavestring (retval
, strlen (retval
),
7547 &objfile
->objfile_obstack
);
7549 do_cleanups (back_to
);
7553 /* Read the import statement specified by the given die and record it. */
7556 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
7558 struct objfile
*objfile
= cu
->objfile
;
7559 struct attribute
*import_attr
;
7560 struct die_info
*imported_die
, *child_die
;
7561 struct dwarf2_cu
*imported_cu
;
7562 const char *imported_name
;
7563 const char *imported_name_prefix
;
7564 const char *canonical_name
;
7565 const char *import_alias
;
7566 const char *imported_declaration
= NULL
;
7567 const char *import_prefix
;
7568 VEC (const_char_ptr
) *excludes
= NULL
;
7569 struct cleanup
*cleanups
;
7573 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
7574 if (import_attr
== NULL
)
7576 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7577 dwarf_tag_name (die
->tag
));
7582 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
7583 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7584 if (imported_name
== NULL
)
7586 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
7588 The import in the following code:
7602 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
7603 <52> DW_AT_decl_file : 1
7604 <53> DW_AT_decl_line : 6
7605 <54> DW_AT_import : <0x75>
7606 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
7608 <5b> DW_AT_decl_file : 1
7609 <5c> DW_AT_decl_line : 2
7610 <5d> DW_AT_type : <0x6e>
7612 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
7613 <76> DW_AT_byte_size : 4
7614 <77> DW_AT_encoding : 5 (signed)
7616 imports the wrong die ( 0x75 instead of 0x58 ).
7617 This case will be ignored until the gcc bug is fixed. */
7621 /* Figure out the local name after import. */
7622 import_alias
= dwarf2_name (die
, cu
);
7624 /* Figure out where the statement is being imported to. */
7625 import_prefix
= determine_prefix (die
, cu
);
7627 /* Figure out what the scope of the imported die is and prepend it
7628 to the name of the imported die. */
7629 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
7631 if (imported_die
->tag
!= DW_TAG_namespace
7632 && imported_die
->tag
!= DW_TAG_module
)
7634 imported_declaration
= imported_name
;
7635 canonical_name
= imported_name_prefix
;
7637 else if (strlen (imported_name_prefix
) > 0)
7639 temp
= alloca (strlen (imported_name_prefix
)
7640 + 2 + strlen (imported_name
) + 1);
7641 strcpy (temp
, imported_name_prefix
);
7642 strcat (temp
, "::");
7643 strcat (temp
, imported_name
);
7644 canonical_name
= temp
;
7647 canonical_name
= imported_name
;
7649 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
7651 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
7652 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
7653 child_die
= sibling_die (child_die
))
7655 /* DWARF-4: A Fortran use statement with a “rename list” may be
7656 represented by an imported module entry with an import attribute
7657 referring to the module and owned entries corresponding to those
7658 entities that are renamed as part of being imported. */
7660 if (child_die
->tag
!= DW_TAG_imported_declaration
)
7662 complaint (&symfile_complaints
,
7663 _("child DW_TAG_imported_declaration expected "
7664 "- DIE at 0x%x [in module %s]"),
7665 child_die
->offset
.sect_off
, objfile
->name
);
7669 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
7670 if (import_attr
== NULL
)
7672 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
7673 dwarf_tag_name (child_die
->tag
));
7678 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
7680 imported_name
= dwarf2_name (imported_die
, imported_cu
);
7681 if (imported_name
== NULL
)
7683 complaint (&symfile_complaints
,
7684 _("child DW_TAG_imported_declaration has unknown "
7685 "imported name - DIE at 0x%x [in module %s]"),
7686 child_die
->offset
.sect_off
, objfile
->name
);
7690 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
7692 process_die (child_die
, cu
);
7695 cp_add_using_directive (import_prefix
,
7698 imported_declaration
,
7700 &objfile
->objfile_obstack
);
7702 do_cleanups (cleanups
);
7705 /* Cleanup function for handle_DW_AT_stmt_list. */
7708 free_cu_line_header (void *arg
)
7710 struct dwarf2_cu
*cu
= arg
;
7712 free_line_header (cu
->line_header
);
7713 cu
->line_header
= NULL
;
7717 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
7718 char **name
, char **comp_dir
)
7720 struct attribute
*attr
;
7725 /* Find the filename. Do not use dwarf2_name here, since the filename
7726 is not a source language identifier. */
7727 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7730 *name
= DW_STRING (attr
);
7733 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
7735 *comp_dir
= DW_STRING (attr
);
7736 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
7738 *comp_dir
= ldirname (*name
);
7739 if (*comp_dir
!= NULL
)
7740 make_cleanup (xfree
, *comp_dir
);
7742 if (*comp_dir
!= NULL
)
7744 /* Irix 6.2 native cc prepends <machine>.: to the compilation
7745 directory, get rid of it. */
7746 char *cp
= strchr (*comp_dir
, ':');
7748 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
7753 *name
= "<unknown>";
7756 /* Handle DW_AT_stmt_list for a compilation unit.
7757 DIE is the DW_TAG_compile_unit die for CU.
7758 COMP_DIR is the compilation directory.
7759 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
7762 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
7763 const char *comp_dir
)
7765 struct attribute
*attr
;
7767 gdb_assert (! cu
->per_cu
->is_debug_types
);
7769 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7772 unsigned int line_offset
= DW_UNSND (attr
);
7773 struct line_header
*line_header
7774 = dwarf_decode_line_header (line_offset
, cu
);
7778 cu
->line_header
= line_header
;
7779 make_cleanup (free_cu_line_header
, cu
);
7780 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, 1);
7785 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
7788 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7790 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7791 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7792 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
7793 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
7794 struct attribute
*attr
;
7796 char *comp_dir
= NULL
;
7797 struct die_info
*child_die
;
7798 bfd
*abfd
= objfile
->obfd
;
7801 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7803 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
7805 /* If we didn't find a lowpc, set it to highpc to avoid complaints
7806 from finish_block. */
7807 if (lowpc
== ((CORE_ADDR
) -1))
7812 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
7814 prepare_one_comp_unit (cu
, die
, cu
->language
);
7816 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
7817 standardised yet. As a workaround for the language detection we fall
7818 back to the DW_AT_producer string. */
7819 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
7820 cu
->language
= language_opencl
;
7822 /* Similar hack for Go. */
7823 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
7824 set_cu_language (DW_LANG_Go
, cu
);
7826 dwarf2_start_symtab (cu
, name
, comp_dir
, lowpc
);
7828 /* Decode line number information if present. We do this before
7829 processing child DIEs, so that the line header table is available
7830 for DW_AT_decl_file. */
7831 handle_DW_AT_stmt_list (die
, cu
, comp_dir
);
7833 /* Process all dies in compilation unit. */
7834 if (die
->child
!= NULL
)
7836 child_die
= die
->child
;
7837 while (child_die
&& child_die
->tag
)
7839 process_die (child_die
, cu
);
7840 child_die
= sibling_die (child_die
);
7844 /* Decode macro information, if present. Dwarf 2 macro information
7845 refers to information in the line number info statement program
7846 header, so we can only read it if we've read the header
7848 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
7849 if (attr
&& cu
->line_header
)
7851 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
7852 complaint (&symfile_complaints
,
7853 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
7855 dwarf_decode_macros (cu
, DW_UNSND (attr
), comp_dir
, 1);
7859 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
7860 if (attr
&& cu
->line_header
)
7862 unsigned int macro_offset
= DW_UNSND (attr
);
7864 dwarf_decode_macros (cu
, macro_offset
, comp_dir
, 0);
7868 do_cleanups (back_to
);
7871 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
7872 Create the set of symtabs used by this TU, or if this TU is sharing
7873 symtabs with another TU and the symtabs have already been created
7874 then restore those symtabs in the line header.
7875 We don't need the pc/line-number mapping for type units. */
7878 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
7880 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7881 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7882 struct type_unit_group
*tu_group
;
7884 struct line_header
*lh
;
7885 struct attribute
*attr
;
7886 unsigned int i
, line_offset
;
7888 gdb_assert (per_cu
->is_debug_types
);
7890 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
7892 /* If we're using .gdb_index (includes -readnow) then
7893 per_cu->s.type_unit_group may not have been set up yet. */
7894 if (per_cu
->s
.type_unit_group
== NULL
)
7895 per_cu
->s
.type_unit_group
= get_type_unit_group (cu
, attr
);
7896 tu_group
= per_cu
->s
.type_unit_group
;
7898 /* If we've already processed this stmt_list there's no real need to
7899 do it again, we could fake it and just recreate the part we need
7900 (file name,index -> symtab mapping). If data shows this optimization
7901 is useful we can do it then. */
7902 first_time
= tu_group
->primary_symtab
== NULL
;
7904 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
7909 line_offset
= DW_UNSND (attr
);
7910 lh
= dwarf_decode_line_header (line_offset
, cu
);
7915 dwarf2_start_symtab (cu
, "", NULL
, 0);
7918 gdb_assert (tu_group
->symtabs
== NULL
);
7921 /* Note: The primary symtab will get allocated at the end. */
7925 cu
->line_header
= lh
;
7926 make_cleanup (free_cu_line_header
, cu
);
7930 dwarf2_start_symtab (cu
, "", NULL
, 0);
7932 tu_group
->num_symtabs
= lh
->num_file_names
;
7933 tu_group
->symtabs
= XNEWVEC (struct symtab
*, lh
->num_file_names
);
7935 for (i
= 0; i
< lh
->num_file_names
; ++i
)
7938 struct file_entry
*fe
= &lh
->file_names
[i
];
7941 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7942 dwarf2_start_subfile (fe
->name
, dir
, NULL
);
7944 /* Note: We don't have to watch for the main subfile here, type units
7945 don't have DW_AT_name. */
7947 if (current_subfile
->symtab
== NULL
)
7949 /* NOTE: start_subfile will recognize when it's been passed
7950 a file it has already seen. So we can't assume there's a
7951 simple mapping from lh->file_names to subfiles,
7952 lh->file_names may contain dups. */
7953 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
7957 fe
->symtab
= current_subfile
->symtab
;
7958 tu_group
->symtabs
[i
] = fe
->symtab
;
7965 for (i
= 0; i
< lh
->num_file_names
; ++i
)
7967 struct file_entry
*fe
= &lh
->file_names
[i
];
7969 fe
->symtab
= tu_group
->symtabs
[i
];
7973 /* The main symtab is allocated last. Type units don't have DW_AT_name
7974 so they don't have a "real" (so to speak) symtab anyway.
7975 There is later code that will assign the main symtab to all symbols
7976 that don't have one. We need to handle the case of a symbol with a
7977 missing symtab (DW_AT_decl_file) anyway. */
7980 /* Process DW_TAG_type_unit.
7981 For TUs we want to skip the first top level sibling if it's not the
7982 actual type being defined by this TU. In this case the first top
7983 level sibling is there to provide context only. */
7986 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7988 struct die_info
*child_die
;
7990 prepare_one_comp_unit (cu
, die
, language_minimal
);
7992 /* Initialize (or reinitialize) the machinery for building symtabs.
7993 We do this before processing child DIEs, so that the line header table
7994 is available for DW_AT_decl_file. */
7995 setup_type_unit_groups (die
, cu
);
7997 if (die
->child
!= NULL
)
7999 child_die
= die
->child
;
8000 while (child_die
&& child_die
->tag
)
8002 process_die (child_die
, cu
);
8003 child_die
= sibling_die (child_die
);
8011 hash_dwo_file (const void *item
)
8013 const struct dwo_file
*dwo_file
= item
;
8015 return htab_hash_string (dwo_file
->dwo_name
);
8019 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
8021 const struct dwo_file
*lhs
= item_lhs
;
8022 const struct dwo_file
*rhs
= item_rhs
;
8024 return strcmp (lhs
->dwo_name
, rhs
->dwo_name
) == 0;
8027 /* Allocate a hash table for DWO files. */
8030 allocate_dwo_file_hash_table (void)
8032 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8034 return htab_create_alloc_ex (41,
8038 &objfile
->objfile_obstack
,
8039 hashtab_obstack_allocate
,
8040 dummy_obstack_deallocate
);
8044 hash_dwo_unit (const void *item
)
8046 const struct dwo_unit
*dwo_unit
= item
;
8048 /* This drops the top 32 bits of the id, but is ok for a hash. */
8049 return dwo_unit
->signature
;
8053 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
8055 const struct dwo_unit
*lhs
= item_lhs
;
8056 const struct dwo_unit
*rhs
= item_rhs
;
8058 /* The signature is assumed to be unique within the DWO file.
8059 So while object file CU dwo_id's always have the value zero,
8060 that's OK, assuming each object file DWO file has only one CU,
8061 and that's the rule for now. */
8062 return lhs
->signature
== rhs
->signature
;
8065 /* Allocate a hash table for DWO CUs,TUs.
8066 There is one of these tables for each of CUs,TUs for each DWO file. */
8069 allocate_dwo_unit_table (struct objfile
*objfile
)
8071 /* Start out with a pretty small number.
8072 Generally DWO files contain only one CU and maybe some TUs. */
8073 return htab_create_alloc_ex (3,
8077 &objfile
->objfile_obstack
,
8078 hashtab_obstack_allocate
,
8079 dummy_obstack_deallocate
);
8082 /* This function is mapped across the sections and remembers the offset and
8083 size of each of the DWO debugging sections we are interested in. */
8086 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_file_ptr
)
8088 struct dwo_file
*dwo_file
= dwo_file_ptr
;
8089 const struct dwo_section_names
*names
= &dwo_section_names
;
8091 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
8093 dwo_file
->sections
.abbrev
.asection
= sectp
;
8094 dwo_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
8096 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
8098 dwo_file
->sections
.info
.asection
= sectp
;
8099 dwo_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
8101 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
8103 dwo_file
->sections
.line
.asection
= sectp
;
8104 dwo_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
8106 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
8108 dwo_file
->sections
.loc
.asection
= sectp
;
8109 dwo_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
8111 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
8113 dwo_file
->sections
.macinfo
.asection
= sectp
;
8114 dwo_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
8116 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
8118 dwo_file
->sections
.macro
.asection
= sectp
;
8119 dwo_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
8121 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
8123 dwo_file
->sections
.str
.asection
= sectp
;
8124 dwo_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
8126 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
8128 dwo_file
->sections
.str_offsets
.asection
= sectp
;
8129 dwo_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
8131 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
8133 struct dwarf2_section_info type_section
;
8135 memset (&type_section
, 0, sizeof (type_section
));
8136 type_section
.asection
= sectp
;
8137 type_section
.size
= bfd_get_section_size (sectp
);
8138 VEC_safe_push (dwarf2_section_info_def
, dwo_file
->sections
.types
,
8143 /* Structure used to pass data to create_debug_info_hash_table_reader. */
8145 struct create_dwo_info_table_data
8147 struct dwo_file
*dwo_file
;
8151 /* die_reader_func for create_debug_info_hash_table. */
8154 create_debug_info_hash_table_reader (const struct die_reader_specs
*reader
,
8156 struct die_info
*comp_unit_die
,
8160 struct dwarf2_cu
*cu
= reader
->cu
;
8161 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8162 sect_offset offset
= cu
->per_cu
->offset
;
8163 struct dwarf2_section_info
*section
= cu
->per_cu
->info_or_types_section
;
8164 struct create_dwo_info_table_data
*data
= datap
;
8165 struct dwo_file
*dwo_file
= data
->dwo_file
;
8166 htab_t cu_htab
= data
->cu_htab
;
8168 struct attribute
*attr
;
8169 struct dwo_unit
*dwo_unit
;
8171 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
8174 error (_("Dwarf Error: debug entry at offset 0x%x is missing"
8175 " its dwo_id [in module %s]"),
8176 offset
.sect_off
, dwo_file
->dwo_name
);
8180 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
8181 dwo_unit
->dwo_file
= dwo_file
;
8182 dwo_unit
->signature
= DW_UNSND (attr
);
8183 dwo_unit
->info_or_types_section
= section
;
8184 dwo_unit
->offset
= offset
;
8185 dwo_unit
->length
= cu
->per_cu
->length
;
8187 slot
= htab_find_slot (cu_htab
, dwo_unit
, INSERT
);
8188 gdb_assert (slot
!= NULL
);
8191 const struct dwo_unit
*dup_dwo_unit
= *slot
;
8193 complaint (&symfile_complaints
,
8194 _("debug entry at offset 0x%x is duplicate to the entry at"
8195 " offset 0x%x, dwo_id 0x%s [in module %s]"),
8196 offset
.sect_off
, dup_dwo_unit
->offset
.sect_off
,
8197 phex (dwo_unit
->signature
, sizeof (dwo_unit
->signature
)),
8198 dwo_file
->dwo_name
);
8203 if (dwarf2_read_debug
)
8204 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, dwo_id 0x%s\n",
8206 phex (dwo_unit
->signature
,
8207 sizeof (dwo_unit
->signature
)));
8210 /* Create a hash table to map DWO IDs to their CU entry in .debug_info.dwo. */
8213 create_debug_info_hash_table (struct dwo_file
*dwo_file
)
8215 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8216 struct dwarf2_section_info
*section
= &dwo_file
->sections
.info
;
8219 gdb_byte
*info_ptr
, *end_ptr
;
8220 struct create_dwo_info_table_data create_dwo_info_table_data
;
8222 dwarf2_read_section (objfile
, section
);
8223 info_ptr
= section
->buffer
;
8225 if (info_ptr
== NULL
)
8228 /* We can't set abfd until now because the section may be empty or
8229 not present, in which case section->asection will be NULL. */
8230 abfd
= section
->asection
->owner
;
8232 if (dwarf2_read_debug
)
8233 fprintf_unfiltered (gdb_stdlog
, "Reading .debug_info.dwo for %s:\n",
8234 bfd_get_filename (abfd
));
8236 cu_htab
= allocate_dwo_unit_table (objfile
);
8238 create_dwo_info_table_data
.dwo_file
= dwo_file
;
8239 create_dwo_info_table_data
.cu_htab
= cu_htab
;
8241 end_ptr
= info_ptr
+ section
->size
;
8242 while (info_ptr
< end_ptr
)
8244 struct dwarf2_per_cu_data per_cu
;
8246 memset (&per_cu
, 0, sizeof (per_cu
));
8247 per_cu
.objfile
= objfile
;
8248 per_cu
.is_debug_types
= 0;
8249 per_cu
.offset
.sect_off
= info_ptr
- section
->buffer
;
8250 per_cu
.info_or_types_section
= section
;
8252 init_cutu_and_read_dies_no_follow (&per_cu
,
8253 &dwo_file
->sections
.abbrev
,
8255 create_debug_info_hash_table_reader
,
8256 &create_dwo_info_table_data
);
8258 info_ptr
+= per_cu
.length
;
8264 /* Subroutine of open_dwo_file to simplify it.
8265 Open the file specified by FILE_NAME and hand it off to BFD for
8266 preliminary analysis. Return a newly initialized bfd *, which
8267 includes a canonicalized copy of FILE_NAME.
8268 In case of trouble, return NULL.
8269 NOTE: This function is derived from symfile_bfd_open. */
8272 try_open_dwo_file (const char *file_name
)
8276 char *absolute_name
;
8278 desc
= openp (debug_file_directory
, OPF_TRY_CWD_FIRST
, file_name
,
8279 O_RDONLY
| O_BINARY
, &absolute_name
);
8283 sym_bfd
= gdb_bfd_open (absolute_name
, gnutarget
, desc
);
8286 xfree (absolute_name
);
8289 xfree (absolute_name
);
8290 bfd_set_cacheable (sym_bfd
, 1);
8292 if (!bfd_check_format (sym_bfd
, bfd_object
))
8294 gdb_bfd_unref (sym_bfd
); /* This also closes desc. */
8301 /* Try to open DWO file DWO_NAME.
8302 COMP_DIR is the DW_AT_comp_dir attribute.
8303 The result is the bfd handle of the file.
8304 If there is a problem finding or opening the file, return NULL.
8305 Upon success, the canonicalized path of the file is stored in the bfd,
8306 same as symfile_bfd_open. */
8309 open_dwo_file (const char *dwo_name
, const char *comp_dir
)
8313 if (IS_ABSOLUTE_PATH (dwo_name
))
8314 return try_open_dwo_file (dwo_name
);
8316 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
8318 if (comp_dir
!= NULL
)
8320 char *path_to_try
= concat (comp_dir
, SLASH_STRING
, dwo_name
, NULL
);
8322 /* NOTE: If comp_dir is a relative path, this will also try the
8323 search path, which seems useful. */
8324 abfd
= try_open_dwo_file (path_to_try
);
8325 xfree (path_to_try
);
8330 /* That didn't work, try debug-file-directory, which, despite its name,
8331 is a list of paths. */
8333 if (*debug_file_directory
== '\0')
8336 return try_open_dwo_file (dwo_name
);
8339 /* Initialize the use of the DWO file specified by DWO_NAME. */
8341 static struct dwo_file
*
8342 init_dwo_file (const char *dwo_name
, const char *comp_dir
)
8344 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8345 struct dwo_file
*dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
8348 struct cleanup
*cleanups
;
8350 if (dwarf2_read_debug
)
8351 fprintf_unfiltered (gdb_stdlog
, "Reading DWO file %s:\n", dwo_name
);
8353 abfd
= open_dwo_file (dwo_name
, comp_dir
);
8356 dwo_file
->dwo_name
= dwo_name
;
8357 dwo_file
->dwo_bfd
= abfd
;
8359 cleanups
= make_cleanup (free_dwo_file_cleanup
, dwo_file
);
8361 bfd_map_over_sections (abfd
, dwarf2_locate_dwo_sections
, dwo_file
);
8363 dwo_file
->cus
= create_debug_info_hash_table (dwo_file
);
8365 dwo_file
->tus
= create_debug_types_hash_table (dwo_file
,
8366 dwo_file
->sections
.types
);
8368 discard_cleanups (cleanups
);
8373 /* Lookup DWO file DWO_NAME. */
8375 static struct dwo_file
*
8376 lookup_dwo_file (char *dwo_name
, const char *comp_dir
)
8378 struct dwo_file
*dwo_file
;
8379 struct dwo_file find_entry
;
8382 if (dwarf2_per_objfile
->dwo_files
== NULL
)
8383 dwarf2_per_objfile
->dwo_files
= allocate_dwo_file_hash_table ();
8385 /* Have we already seen this DWO file? */
8386 find_entry
.dwo_name
= dwo_name
;
8387 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
8389 /* If not, read it in and build a table of the DWOs it contains. */
8391 *slot
= init_dwo_file (dwo_name
, comp_dir
);
8393 /* NOTE: This will be NULL if unable to open the file. */
8399 /* Lookup the DWO CU referenced from THIS_CU in DWO file DWO_NAME.
8400 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
8401 SIGNATURE is the "dwo_id" of the CU (for consistency we use the same
8402 nomenclature as TUs).
8403 The result is a pointer to the dwo_unit object or NULL if we didn't find it
8404 (dwo_id mismatch or couldn't find the DWO file). */
8406 static struct dwo_unit
*
8407 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8408 char *dwo_name
, const char *comp_dir
,
8411 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8412 struct dwo_file
*dwo_file
;
8414 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
8415 if (dwo_file
== NULL
)
8418 /* Look up the DWO using its signature(dwo_id). */
8420 if (dwo_file
->cus
!= NULL
)
8422 struct dwo_unit find_dwo_cu
, *dwo_cu
;
8424 find_dwo_cu
.signature
= signature
;
8425 dwo_cu
= htab_find (dwo_file
->cus
, &find_dwo_cu
);
8431 /* We didn't find it. This must mean a dwo_id mismatch. */
8433 complaint (&symfile_complaints
,
8434 _("Could not find DWO CU referenced by CU at offset 0x%x"
8436 this_cu
->offset
.sect_off
, objfile
->name
);
8440 /* Lookup the DWO TU referenced from THIS_TU in DWO file DWO_NAME.
8441 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
8442 The result is a pointer to the dwo_unit object or NULL if we didn't find it
8443 (dwo_id mismatch or couldn't find the DWO file). */
8445 static struct dwo_unit
*
8446 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
8447 char *dwo_name
, const char *comp_dir
)
8449 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8450 struct dwo_file
*dwo_file
;
8452 dwo_file
= lookup_dwo_file (dwo_name
, comp_dir
);
8453 if (dwo_file
== NULL
)
8456 /* Look up the DWO using its signature(dwo_id). */
8458 if (dwo_file
->tus
!= NULL
)
8460 struct dwo_unit find_dwo_tu
, *dwo_tu
;
8462 find_dwo_tu
.signature
= this_tu
->signature
;
8463 dwo_tu
= htab_find (dwo_file
->tus
, &find_dwo_tu
);
8469 /* We didn't find it. This must mean a dwo_id mismatch. */
8471 complaint (&symfile_complaints
,
8472 _("Could not find DWO TU referenced by TU at offset 0x%x"
8474 this_tu
->per_cu
.offset
.sect_off
, objfile
->name
);
8478 /* Free all resources associated with DWO_FILE.
8479 Close the DWO file and munmap the sections.
8480 All memory should be on the objfile obstack. */
8483 free_dwo_file (struct dwo_file
*dwo_file
, struct objfile
*objfile
)
8486 struct dwarf2_section_info
*section
;
8488 gdb_assert (dwo_file
->dwo_bfd
!= objfile
->obfd
);
8489 gdb_bfd_unref (dwo_file
->dwo_bfd
);
8491 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
8494 /* Wrapper for free_dwo_file for use in cleanups. */
8497 free_dwo_file_cleanup (void *arg
)
8499 struct dwo_file
*dwo_file
= (struct dwo_file
*) arg
;
8500 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8502 free_dwo_file (dwo_file
, objfile
);
8505 /* Traversal function for free_dwo_files. */
8508 free_dwo_file_from_slot (void **slot
, void *info
)
8510 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8511 struct objfile
*objfile
= (struct objfile
*) info
;
8513 free_dwo_file (dwo_file
, objfile
);
8518 /* Free all resources associated with DWO_FILES. */
8521 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
8523 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
8526 /* Read in various DIEs. */
8528 /* qsort helper for inherit_abstract_dies. */
8531 unsigned_int_compar (const void *ap
, const void *bp
)
8533 unsigned int a
= *(unsigned int *) ap
;
8534 unsigned int b
= *(unsigned int *) bp
;
8536 return (a
> b
) - (b
> a
);
8539 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
8540 Inherit only the children of the DW_AT_abstract_origin DIE not being
8541 already referenced by DW_AT_abstract_origin from the children of the
8545 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
8547 struct die_info
*child_die
;
8548 unsigned die_children_count
;
8549 /* CU offsets which were referenced by children of the current DIE. */
8550 sect_offset
*offsets
;
8551 sect_offset
*offsets_end
, *offsetp
;
8552 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
8553 struct die_info
*origin_die
;
8554 /* Iterator of the ORIGIN_DIE children. */
8555 struct die_info
*origin_child_die
;
8556 struct cleanup
*cleanups
;
8557 struct attribute
*attr
;
8558 struct dwarf2_cu
*origin_cu
;
8559 struct pending
**origin_previous_list_in_scope
;
8561 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
8565 /* Note that following die references may follow to a die in a
8569 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
8571 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
8573 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
8574 origin_cu
->list_in_scope
= cu
->list_in_scope
;
8576 if (die
->tag
!= origin_die
->tag
8577 && !(die
->tag
== DW_TAG_inlined_subroutine
8578 && origin_die
->tag
== DW_TAG_subprogram
))
8579 complaint (&symfile_complaints
,
8580 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
8581 die
->offset
.sect_off
, origin_die
->offset
.sect_off
);
8583 child_die
= die
->child
;
8584 die_children_count
= 0;
8585 while (child_die
&& child_die
->tag
)
8587 child_die
= sibling_die (child_die
);
8588 die_children_count
++;
8590 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
8591 cleanups
= make_cleanup (xfree
, offsets
);
8593 offsets_end
= offsets
;
8594 child_die
= die
->child
;
8595 while (child_die
&& child_die
->tag
)
8597 /* For each CHILD_DIE, find the corresponding child of
8598 ORIGIN_DIE. If there is more than one layer of
8599 DW_AT_abstract_origin, follow them all; there shouldn't be,
8600 but GCC versions at least through 4.4 generate this (GCC PR
8602 struct die_info
*child_origin_die
= child_die
;
8603 struct dwarf2_cu
*child_origin_cu
= cu
;
8607 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
8611 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
8615 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
8616 counterpart may exist. */
8617 if (child_origin_die
!= child_die
)
8619 if (child_die
->tag
!= child_origin_die
->tag
8620 && !(child_die
->tag
== DW_TAG_inlined_subroutine
8621 && child_origin_die
->tag
== DW_TAG_subprogram
))
8622 complaint (&symfile_complaints
,
8623 _("Child DIE 0x%x and its abstract origin 0x%x have "
8624 "different tags"), child_die
->offset
.sect_off
,
8625 child_origin_die
->offset
.sect_off
);
8626 if (child_origin_die
->parent
!= origin_die
)
8627 complaint (&symfile_complaints
,
8628 _("Child DIE 0x%x and its abstract origin 0x%x have "
8629 "different parents"), child_die
->offset
.sect_off
,
8630 child_origin_die
->offset
.sect_off
);
8632 *offsets_end
++ = child_origin_die
->offset
;
8634 child_die
= sibling_die (child_die
);
8636 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
8637 unsigned_int_compar
);
8638 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
8639 if (offsetp
[-1].sect_off
== offsetp
->sect_off
)
8640 complaint (&symfile_complaints
,
8641 _("Multiple children of DIE 0x%x refer "
8642 "to DIE 0x%x as their abstract origin"),
8643 die
->offset
.sect_off
, offsetp
->sect_off
);
8646 origin_child_die
= origin_die
->child
;
8647 while (origin_child_die
&& origin_child_die
->tag
)
8649 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
8650 while (offsetp
< offsets_end
8651 && offsetp
->sect_off
< origin_child_die
->offset
.sect_off
)
8653 if (offsetp
>= offsets_end
8654 || offsetp
->sect_off
> origin_child_die
->offset
.sect_off
)
8656 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
8657 process_die (origin_child_die
, origin_cu
);
8659 origin_child_die
= sibling_die (origin_child_die
);
8661 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
8663 do_cleanups (cleanups
);
8667 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8669 struct objfile
*objfile
= cu
->objfile
;
8670 struct context_stack
*new;
8673 struct die_info
*child_die
;
8674 struct attribute
*attr
, *call_line
, *call_file
;
8677 struct block
*block
;
8678 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8679 VEC (symbolp
) *template_args
= NULL
;
8680 struct template_symbol
*templ_func
= NULL
;
8684 /* If we do not have call site information, we can't show the
8685 caller of this inlined function. That's too confusing, so
8686 only use the scope for local variables. */
8687 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
8688 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
8689 if (call_line
== NULL
|| call_file
== NULL
)
8691 read_lexical_block_scope (die
, cu
);
8696 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8698 name
= dwarf2_name (die
, cu
);
8700 /* Ignore functions with missing or empty names. These are actually
8701 illegal according to the DWARF standard. */
8704 complaint (&symfile_complaints
,
8705 _("missing name for subprogram DIE at %d"),
8706 die
->offset
.sect_off
);
8710 /* Ignore functions with missing or invalid low and high pc attributes. */
8711 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
8713 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
8714 if (!attr
|| !DW_UNSND (attr
))
8715 complaint (&symfile_complaints
,
8716 _("cannot get low and high bounds "
8717 "for subprogram DIE at %d"),
8718 die
->offset
.sect_off
);
8725 /* If we have any template arguments, then we must allocate a
8726 different sort of symbol. */
8727 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
8729 if (child_die
->tag
== DW_TAG_template_type_param
8730 || child_die
->tag
== DW_TAG_template_value_param
)
8732 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
8733 struct template_symbol
);
8734 templ_func
->base
.is_cplus_template_function
= 1;
8739 new = push_context (0, lowpc
);
8740 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
8741 (struct symbol
*) templ_func
);
8743 /* If there is a location expression for DW_AT_frame_base, record
8745 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
8747 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
8748 expression is being recorded directly in the function's symbol
8749 and not in a separate frame-base object. I guess this hack is
8750 to avoid adding some sort of frame-base adjunct/annex to the
8751 function's symbol :-(. The problem with doing this is that it
8752 results in a function symbol with a location expression that
8753 has nothing to do with the location of the function, ouch! The
8754 relationship should be: a function's symbol has-a frame base; a
8755 frame-base has-a location expression. */
8756 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
8758 cu
->list_in_scope
= &local_symbols
;
8760 if (die
->child
!= NULL
)
8762 child_die
= die
->child
;
8763 while (child_die
&& child_die
->tag
)
8765 if (child_die
->tag
== DW_TAG_template_type_param
8766 || child_die
->tag
== DW_TAG_template_value_param
)
8768 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
8771 VEC_safe_push (symbolp
, template_args
, arg
);
8774 process_die (child_die
, cu
);
8775 child_die
= sibling_die (child_die
);
8779 inherit_abstract_dies (die
, cu
);
8781 /* If we have a DW_AT_specification, we might need to import using
8782 directives from the context of the specification DIE. See the
8783 comment in determine_prefix. */
8784 if (cu
->language
== language_cplus
8785 && dwarf2_attr (die
, DW_AT_specification
, cu
))
8787 struct dwarf2_cu
*spec_cu
= cu
;
8788 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
8792 child_die
= spec_die
->child
;
8793 while (child_die
&& child_die
->tag
)
8795 if (child_die
->tag
== DW_TAG_imported_module
)
8796 process_die (child_die
, spec_cu
);
8797 child_die
= sibling_die (child_die
);
8800 /* In some cases, GCC generates specification DIEs that
8801 themselves contain DW_AT_specification attributes. */
8802 spec_die
= die_specification (spec_die
, &spec_cu
);
8806 new = pop_context ();
8807 /* Make a block for the local symbols within. */
8808 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
8809 lowpc
, highpc
, objfile
);
8811 /* For C++, set the block's scope. */
8812 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
8813 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
8814 determine_prefix (die
, cu
),
8815 processing_has_namespace_info
);
8817 /* If we have address ranges, record them. */
8818 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
8820 /* Attach template arguments to function. */
8821 if (! VEC_empty (symbolp
, template_args
))
8823 gdb_assert (templ_func
!= NULL
);
8825 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
8826 templ_func
->template_arguments
8827 = obstack_alloc (&objfile
->objfile_obstack
,
8828 (templ_func
->n_template_arguments
8829 * sizeof (struct symbol
*)));
8830 memcpy (templ_func
->template_arguments
,
8831 VEC_address (symbolp
, template_args
),
8832 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
8833 VEC_free (symbolp
, template_args
);
8836 /* In C++, we can have functions nested inside functions (e.g., when
8837 a function declares a class that has methods). This means that
8838 when we finish processing a function scope, we may need to go
8839 back to building a containing block's symbol lists. */
8840 local_symbols
= new->locals
;
8841 using_directives
= new->using_directives
;
8843 /* If we've finished processing a top-level function, subsequent
8844 symbols go in the file symbol list. */
8845 if (outermost_context_p ())
8846 cu
->list_in_scope
= &file_symbols
;
8849 /* Process all the DIES contained within a lexical block scope. Start
8850 a new scope, process the dies, and then close the scope. */
8853 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8855 struct objfile
*objfile
= cu
->objfile
;
8856 struct context_stack
*new;
8857 CORE_ADDR lowpc
, highpc
;
8858 struct die_info
*child_die
;
8861 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8863 /* Ignore blocks with missing or invalid low and high pc attributes. */
8864 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
8865 as multiple lexical blocks? Handling children in a sane way would
8866 be nasty. Might be easier to properly extend generic blocks to
8868 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
8873 push_context (0, lowpc
);
8874 if (die
->child
!= NULL
)
8876 child_die
= die
->child
;
8877 while (child_die
&& child_die
->tag
)
8879 process_die (child_die
, cu
);
8880 child_die
= sibling_die (child_die
);
8883 new = pop_context ();
8885 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
8888 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
8891 /* Note that recording ranges after traversing children, as we
8892 do here, means that recording a parent's ranges entails
8893 walking across all its children's ranges as they appear in
8894 the address map, which is quadratic behavior.
8896 It would be nicer to record the parent's ranges before
8897 traversing its children, simply overriding whatever you find
8898 there. But since we don't even decide whether to create a
8899 block until after we've traversed its children, that's hard
8901 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
8903 local_symbols
= new->locals
;
8904 using_directives
= new->using_directives
;
8907 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
8910 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
8912 struct objfile
*objfile
= cu
->objfile
;
8913 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8914 CORE_ADDR pc
, baseaddr
;
8915 struct attribute
*attr
;
8916 struct call_site
*call_site
, call_site_local
;
8919 struct die_info
*child_die
;
8921 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8923 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8926 complaint (&symfile_complaints
,
8927 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
8928 "DIE 0x%x [in module %s]"),
8929 die
->offset
.sect_off
, objfile
->name
);
8932 pc
= DW_ADDR (attr
) + baseaddr
;
8934 if (cu
->call_site_htab
== NULL
)
8935 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
8936 NULL
, &objfile
->objfile_obstack
,
8937 hashtab_obstack_allocate
, NULL
);
8938 call_site_local
.pc
= pc
;
8939 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
8942 complaint (&symfile_complaints
,
8943 _("Duplicate PC %s for DW_TAG_GNU_call_site "
8944 "DIE 0x%x [in module %s]"),
8945 paddress (gdbarch
, pc
), die
->offset
.sect_off
, objfile
->name
);
8949 /* Count parameters at the caller. */
8952 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
8953 child_die
= sibling_die (child_die
))
8955 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
8957 complaint (&symfile_complaints
,
8958 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
8959 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
8960 child_die
->tag
, child_die
->offset
.sect_off
, objfile
->name
);
8967 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
8968 (sizeof (*call_site
)
8969 + (sizeof (*call_site
->parameter
)
8972 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
8975 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
8977 struct die_info
*func_die
;
8979 /* Skip also over DW_TAG_inlined_subroutine. */
8980 for (func_die
= die
->parent
;
8981 func_die
&& func_die
->tag
!= DW_TAG_subprogram
8982 && func_die
->tag
!= DW_TAG_subroutine_type
;
8983 func_die
= func_die
->parent
);
8985 /* DW_AT_GNU_all_call_sites is a superset
8986 of DW_AT_GNU_all_tail_call_sites. */
8988 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
8989 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
8991 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
8992 not complete. But keep CALL_SITE for look ups via call_site_htab,
8993 both the initial caller containing the real return address PC and
8994 the final callee containing the current PC of a chain of tail
8995 calls do not need to have the tail call list complete. But any
8996 function candidate for a virtual tail call frame searched via
8997 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
8998 determined unambiguously. */
9002 struct type
*func_type
= NULL
;
9005 func_type
= get_die_type (func_die
, cu
);
9006 if (func_type
!= NULL
)
9008 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
9010 /* Enlist this call site to the function. */
9011 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
9012 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
9015 complaint (&symfile_complaints
,
9016 _("Cannot find function owning DW_TAG_GNU_call_site "
9017 "DIE 0x%x [in module %s]"),
9018 die
->offset
.sect_off
, objfile
->name
);
9022 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
9024 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
9025 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
9026 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
9027 /* Keep NULL DWARF_BLOCK. */;
9028 else if (attr_form_is_block (attr
))
9030 struct dwarf2_locexpr_baton
*dlbaton
;
9032 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
9033 dlbaton
->data
= DW_BLOCK (attr
)->data
;
9034 dlbaton
->size
= DW_BLOCK (attr
)->size
;
9035 dlbaton
->per_cu
= cu
->per_cu
;
9037 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
9039 else if (is_ref_attr (attr
))
9041 struct dwarf2_cu
*target_cu
= cu
;
9042 struct die_info
*target_die
;
9044 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
9045 gdb_assert (target_cu
->objfile
== objfile
);
9046 if (die_is_declaration (target_die
, target_cu
))
9048 const char *target_physname
;
9050 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
9051 if (target_physname
== NULL
)
9052 complaint (&symfile_complaints
,
9053 _("DW_AT_GNU_call_site_target target DIE has invalid "
9054 "physname, for referencing DIE 0x%x [in module %s]"),
9055 die
->offset
.sect_off
, objfile
->name
);
9057 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
9063 /* DW_AT_entry_pc should be preferred. */
9064 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
9065 complaint (&symfile_complaints
,
9066 _("DW_AT_GNU_call_site_target target DIE has invalid "
9067 "low pc, for referencing DIE 0x%x [in module %s]"),
9068 die
->offset
.sect_off
, objfile
->name
);
9070 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
9074 complaint (&symfile_complaints
,
9075 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
9076 "block nor reference, for DIE 0x%x [in module %s]"),
9077 die
->offset
.sect_off
, objfile
->name
);
9079 call_site
->per_cu
= cu
->per_cu
;
9081 for (child_die
= die
->child
;
9082 child_die
&& child_die
->tag
;
9083 child_die
= sibling_die (child_die
))
9085 struct call_site_parameter
*parameter
;
9086 struct attribute
*loc
, *origin
;
9088 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
9090 /* Already printed the complaint above. */
9094 gdb_assert (call_site
->parameter_count
< nparams
);
9095 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
9097 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
9098 specifies DW_TAG_formal_parameter. Value of the data assumed for the
9099 register is contained in DW_AT_GNU_call_site_value. */
9101 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
9102 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
9103 if (loc
== NULL
&& origin
!= NULL
&& is_ref_attr (origin
))
9107 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
9108 offset
= dwarf2_get_ref_die_offset (origin
);
9109 if (!offset_in_cu_p (&cu
->header
, offset
))
9111 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
9112 binding can be done only inside one CU. Such referenced DIE
9113 therefore cannot be even moved to DW_TAG_partial_unit. */
9114 complaint (&symfile_complaints
,
9115 _("DW_AT_abstract_origin offset is not in CU for "
9116 "DW_TAG_GNU_call_site child DIE 0x%x "
9118 child_die
->offset
.sect_off
, objfile
->name
);
9121 parameter
->u
.param_offset
.cu_off
= (offset
.sect_off
9122 - cu
->header
.offset
.sect_off
);
9124 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
9126 complaint (&symfile_complaints
,
9127 _("No DW_FORM_block* DW_AT_location for "
9128 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9129 child_die
->offset
.sect_off
, objfile
->name
);
9134 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
9135 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
9136 if (parameter
->u
.dwarf_reg
!= -1)
9137 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
9138 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
9139 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
9140 ¶meter
->u
.fb_offset
))
9141 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
9144 complaint (&symfile_complaints
,
9145 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
9146 "for DW_FORM_block* DW_AT_location is supported for "
9147 "DW_TAG_GNU_call_site child DIE 0x%x "
9149 child_die
->offset
.sect_off
, objfile
->name
);
9154 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
9155 if (!attr_form_is_block (attr
))
9157 complaint (&symfile_complaints
,
9158 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
9159 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9160 child_die
->offset
.sect_off
, objfile
->name
);
9163 parameter
->value
= DW_BLOCK (attr
)->data
;
9164 parameter
->value_size
= DW_BLOCK (attr
)->size
;
9166 /* Parameters are not pre-cleared by memset above. */
9167 parameter
->data_value
= NULL
;
9168 parameter
->data_value_size
= 0;
9169 call_site
->parameter_count
++;
9171 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
9174 if (!attr_form_is_block (attr
))
9175 complaint (&symfile_complaints
,
9176 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
9177 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
9178 child_die
->offset
.sect_off
, objfile
->name
);
9181 parameter
->data_value
= DW_BLOCK (attr
)->data
;
9182 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
9188 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
9189 Return 1 if the attributes are present and valid, otherwise, return 0.
9190 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
9193 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
9194 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
9195 struct partial_symtab
*ranges_pst
)
9197 struct objfile
*objfile
= cu
->objfile
;
9198 struct comp_unit_head
*cu_header
= &cu
->header
;
9199 bfd
*obfd
= objfile
->obfd
;
9200 unsigned int addr_size
= cu_header
->addr_size
;
9201 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9202 /* Base address selection entry. */
9213 found_base
= cu
->base_known
;
9214 base
= cu
->base_address
;
9216 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
9217 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9219 complaint (&symfile_complaints
,
9220 _("Offset %d out of bounds for DW_AT_ranges attribute"),
9224 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9226 /* Read in the largest possible address. */
9227 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
9228 if ((marker
& mask
) == mask
)
9230 /* If we found the largest possible address, then
9231 read the base address. */
9232 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9233 buffer
+= 2 * addr_size
;
9234 offset
+= 2 * addr_size
;
9240 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
9244 CORE_ADDR range_beginning
, range_end
;
9246 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
9247 buffer
+= addr_size
;
9248 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
9249 buffer
+= addr_size
;
9250 offset
+= 2 * addr_size
;
9252 /* An end of list marker is a pair of zero addresses. */
9253 if (range_beginning
== 0 && range_end
== 0)
9254 /* Found the end of list entry. */
9257 /* Each base address selection entry is a pair of 2 values.
9258 The first is the largest possible address, the second is
9259 the base address. Check for a base address here. */
9260 if ((range_beginning
& mask
) == mask
)
9262 /* If we found the largest possible address, then
9263 read the base address. */
9264 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
9271 /* We have no valid base address for the ranges
9273 complaint (&symfile_complaints
,
9274 _("Invalid .debug_ranges data (no base address)"));
9278 if (range_beginning
> range_end
)
9280 /* Inverted range entries are invalid. */
9281 complaint (&symfile_complaints
,
9282 _("Invalid .debug_ranges data (inverted range)"));
9286 /* Empty range entries have no effect. */
9287 if (range_beginning
== range_end
)
9290 range_beginning
+= base
;
9293 /* A not-uncommon case of bad debug info.
9294 Don't pollute the addrmap with bad data. */
9295 if (range_beginning
+ baseaddr
== 0
9296 && !dwarf2_per_objfile
->has_section_at_zero
)
9298 complaint (&symfile_complaints
,
9299 _(".debug_ranges entry has start address of zero"
9300 " [in module %s]"), objfile
->name
);
9304 if (ranges_pst
!= NULL
)
9305 addrmap_set_empty (objfile
->psymtabs_addrmap
,
9306 range_beginning
+ baseaddr
,
9307 range_end
- 1 + baseaddr
,
9310 /* FIXME: This is recording everything as a low-high
9311 segment of consecutive addresses. We should have a
9312 data structure for discontiguous block ranges
9316 low
= range_beginning
;
9322 if (range_beginning
< low
)
9323 low
= range_beginning
;
9324 if (range_end
> high
)
9330 /* If the first entry is an end-of-list marker, the range
9331 describes an empty scope, i.e. no instructions. */
9337 *high_return
= high
;
9341 /* Get low and high pc attributes from a die. Return 1 if the attributes
9342 are present and valid, otherwise, return 0. Return -1 if the range is
9343 discontinuous, i.e. derived from DW_AT_ranges information. */
9346 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
9347 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
9348 struct partial_symtab
*pst
)
9350 struct attribute
*attr
;
9351 struct attribute
*attr_high
;
9356 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
9359 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9362 low
= DW_ADDR (attr
);
9363 if (attr_high
->form
== DW_FORM_addr
9364 || attr_high
->form
== DW_FORM_GNU_addr_index
)
9365 high
= DW_ADDR (attr_high
);
9367 high
= low
+ DW_UNSND (attr_high
);
9370 /* Found high w/o low attribute. */
9373 /* Found consecutive range of addresses. */
9378 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
9381 unsigned int ranges_offset
= DW_UNSND (attr
) + cu
->ranges_base
;
9383 /* Value of the DW_AT_ranges attribute is the offset in the
9384 .debug_ranges section. */
9385 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
9387 /* Found discontinuous range of addresses. */
9392 /* read_partial_die has also the strict LOW < HIGH requirement. */
9396 /* When using the GNU linker, .gnu.linkonce. sections are used to
9397 eliminate duplicate copies of functions and vtables and such.
9398 The linker will arbitrarily choose one and discard the others.
9399 The AT_*_pc values for such functions refer to local labels in
9400 these sections. If the section from that file was discarded, the
9401 labels are not in the output, so the relocs get a value of 0.
9402 If this is a discarded function, mark the pc bounds as invalid,
9403 so that GDB will ignore it. */
9404 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
9413 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
9414 its low and high PC addresses. Do nothing if these addresses could not
9415 be determined. Otherwise, set LOWPC to the low address if it is smaller,
9416 and HIGHPC to the high address if greater than HIGHPC. */
9419 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
9420 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9421 struct dwarf2_cu
*cu
)
9423 CORE_ADDR low
, high
;
9424 struct die_info
*child
= die
->child
;
9426 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
9428 *lowpc
= min (*lowpc
, low
);
9429 *highpc
= max (*highpc
, high
);
9432 /* If the language does not allow nested subprograms (either inside
9433 subprograms or lexical blocks), we're done. */
9434 if (cu
->language
!= language_ada
)
9437 /* Check all the children of the given DIE. If it contains nested
9438 subprograms, then check their pc bounds. Likewise, we need to
9439 check lexical blocks as well, as they may also contain subprogram
9441 while (child
&& child
->tag
)
9443 if (child
->tag
== DW_TAG_subprogram
9444 || child
->tag
== DW_TAG_lexical_block
)
9445 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
9446 child
= sibling_die (child
);
9450 /* Get the low and high pc's represented by the scope DIE, and store
9451 them in *LOWPC and *HIGHPC. If the correct values can't be
9452 determined, set *LOWPC to -1 and *HIGHPC to 0. */
9455 get_scope_pc_bounds (struct die_info
*die
,
9456 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9457 struct dwarf2_cu
*cu
)
9459 CORE_ADDR best_low
= (CORE_ADDR
) -1;
9460 CORE_ADDR best_high
= (CORE_ADDR
) 0;
9461 CORE_ADDR current_low
, current_high
;
9463 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
9465 best_low
= current_low
;
9466 best_high
= current_high
;
9470 struct die_info
*child
= die
->child
;
9472 while (child
&& child
->tag
)
9474 switch (child
->tag
) {
9475 case DW_TAG_subprogram
:
9476 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
9478 case DW_TAG_namespace
:
9480 /* FIXME: carlton/2004-01-16: Should we do this for
9481 DW_TAG_class_type/DW_TAG_structure_type, too? I think
9482 that current GCC's always emit the DIEs corresponding
9483 to definitions of methods of classes as children of a
9484 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
9485 the DIEs giving the declarations, which could be
9486 anywhere). But I don't see any reason why the
9487 standards says that they have to be there. */
9488 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
9490 if (current_low
!= ((CORE_ADDR
) -1))
9492 best_low
= min (best_low
, current_low
);
9493 best_high
= max (best_high
, current_high
);
9501 child
= sibling_die (child
);
9506 *highpc
= best_high
;
9509 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
9513 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
9514 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
9516 struct objfile
*objfile
= cu
->objfile
;
9517 struct attribute
*attr
;
9518 struct attribute
*attr_high
;
9520 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
9523 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
9526 CORE_ADDR low
= DW_ADDR (attr
);
9528 if (attr_high
->form
== DW_FORM_addr
9529 || attr_high
->form
== DW_FORM_GNU_addr_index
)
9530 high
= DW_ADDR (attr_high
);
9532 high
= low
+ DW_UNSND (attr_high
);
9534 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
9538 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
9541 bfd
*obfd
= objfile
->obfd
;
9543 /* The value of the DW_AT_ranges attribute is the offset of the
9544 address range list in the .debug_ranges section. */
9545 unsigned long offset
= DW_UNSND (attr
) + cu
->ranges_base
;
9546 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
9548 /* For some target architectures, but not others, the
9549 read_address function sign-extends the addresses it returns.
9550 To recognize base address selection entries, we need a
9552 unsigned int addr_size
= cu
->header
.addr_size
;
9553 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
9555 /* The base address, to which the next pair is relative. Note
9556 that this 'base' is a DWARF concept: most entries in a range
9557 list are relative, to reduce the number of relocs against the
9558 debugging information. This is separate from this function's
9559 'baseaddr' argument, which GDB uses to relocate debugging
9560 information from a shared library based on the address at
9561 which the library was loaded. */
9562 CORE_ADDR base
= cu
->base_address
;
9563 int base_known
= cu
->base_known
;
9565 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
9566 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
9568 complaint (&symfile_complaints
,
9569 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
9576 unsigned int bytes_read
;
9577 CORE_ADDR start
, end
;
9579 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
9580 buffer
+= bytes_read
;
9581 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
9582 buffer
+= bytes_read
;
9584 /* Did we find the end of the range list? */
9585 if (start
== 0 && end
== 0)
9588 /* Did we find a base address selection entry? */
9589 else if ((start
& base_select_mask
) == base_select_mask
)
9595 /* We found an ordinary address range. */
9600 complaint (&symfile_complaints
,
9601 _("Invalid .debug_ranges data "
9602 "(no base address)"));
9608 /* Inverted range entries are invalid. */
9609 complaint (&symfile_complaints
,
9610 _("Invalid .debug_ranges data "
9611 "(inverted range)"));
9615 /* Empty range entries have no effect. */
9619 start
+= base
+ baseaddr
;
9620 end
+= base
+ baseaddr
;
9622 /* A not-uncommon case of bad debug info.
9623 Don't pollute the addrmap with bad data. */
9624 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
9626 complaint (&symfile_complaints
,
9627 _(".debug_ranges entry has start address of zero"
9628 " [in module %s]"), objfile
->name
);
9632 record_block_range (block
, start
, end
- 1);
9638 /* Check whether the producer field indicates either of GCC < 4.6, or the
9639 Intel C/C++ compiler, and cache the result in CU. */
9642 check_producer (struct dwarf2_cu
*cu
)
9645 int major
, minor
, release
;
9647 if (cu
->producer
== NULL
)
9649 /* For unknown compilers expect their behavior is DWARF version
9652 GCC started to support .debug_types sections by -gdwarf-4 since
9653 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
9654 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
9655 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
9656 interpreted incorrectly by GDB now - GCC PR debug/48229. */
9658 else if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) == 0)
9660 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
9662 cs
= &cu
->producer
[strlen ("GNU ")];
9663 while (*cs
&& !isdigit (*cs
))
9665 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
9667 /* Not recognized as GCC. */
9670 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
9672 else if (strncmp (cu
->producer
, "Intel(R) C", strlen ("Intel(R) C")) == 0)
9673 cu
->producer_is_icc
= 1;
9676 /* For other non-GCC compilers, expect their behavior is DWARF version
9680 cu
->checked_producer
= 1;
9683 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
9684 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
9685 during 4.6.0 experimental. */
9688 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
9690 if (!cu
->checked_producer
)
9691 check_producer (cu
);
9693 return cu
->producer_is_gxx_lt_4_6
;
9696 /* Return the default accessibility type if it is not overriden by
9697 DW_AT_accessibility. */
9699 static enum dwarf_access_attribute
9700 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
9702 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
9704 /* The default DWARF 2 accessibility for members is public, the default
9705 accessibility for inheritance is private. */
9707 if (die
->tag
!= DW_TAG_inheritance
)
9708 return DW_ACCESS_public
;
9710 return DW_ACCESS_private
;
9714 /* DWARF 3+ defines the default accessibility a different way. The same
9715 rules apply now for DW_TAG_inheritance as for the members and it only
9716 depends on the container kind. */
9718 if (die
->parent
->tag
== DW_TAG_class_type
)
9719 return DW_ACCESS_private
;
9721 return DW_ACCESS_public
;
9725 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
9726 offset. If the attribute was not found return 0, otherwise return
9727 1. If it was found but could not properly be handled, set *OFFSET
9731 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
9734 struct attribute
*attr
;
9736 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
9741 /* Note that we do not check for a section offset first here.
9742 This is because DW_AT_data_member_location is new in DWARF 4,
9743 so if we see it, we can assume that a constant form is really
9744 a constant and not a section offset. */
9745 if (attr_form_is_constant (attr
))
9746 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
9747 else if (attr_form_is_section_offset (attr
))
9748 dwarf2_complex_location_expr_complaint ();
9749 else if (attr_form_is_block (attr
))
9750 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
9752 dwarf2_complex_location_expr_complaint ();
9760 /* Add an aggregate field to the field list. */
9763 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
9764 struct dwarf2_cu
*cu
)
9766 struct objfile
*objfile
= cu
->objfile
;
9767 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9768 struct nextfield
*new_field
;
9769 struct attribute
*attr
;
9771 char *fieldname
= "";
9773 /* Allocate a new field list entry and link it in. */
9774 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
9775 make_cleanup (xfree
, new_field
);
9776 memset (new_field
, 0, sizeof (struct nextfield
));
9778 if (die
->tag
== DW_TAG_inheritance
)
9780 new_field
->next
= fip
->baseclasses
;
9781 fip
->baseclasses
= new_field
;
9785 new_field
->next
= fip
->fields
;
9786 fip
->fields
= new_field
;
9790 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
9792 new_field
->accessibility
= DW_UNSND (attr
);
9794 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
9795 if (new_field
->accessibility
!= DW_ACCESS_public
)
9796 fip
->non_public_fields
= 1;
9798 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
9800 new_field
->virtuality
= DW_UNSND (attr
);
9802 new_field
->virtuality
= DW_VIRTUALITY_none
;
9804 fp
= &new_field
->field
;
9806 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
9810 /* Data member other than a C++ static data member. */
9812 /* Get type of field. */
9813 fp
->type
= die_type (die
, cu
);
9815 SET_FIELD_BITPOS (*fp
, 0);
9817 /* Get bit size of field (zero if none). */
9818 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
9821 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
9825 FIELD_BITSIZE (*fp
) = 0;
9828 /* Get bit offset of field. */
9829 if (handle_data_member_location (die
, cu
, &offset
))
9830 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
9831 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
9834 if (gdbarch_bits_big_endian (gdbarch
))
9836 /* For big endian bits, the DW_AT_bit_offset gives the
9837 additional bit offset from the MSB of the containing
9838 anonymous object to the MSB of the field. We don't
9839 have to do anything special since we don't need to
9840 know the size of the anonymous object. */
9841 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
9845 /* For little endian bits, compute the bit offset to the
9846 MSB of the anonymous object, subtract off the number of
9847 bits from the MSB of the field to the MSB of the
9848 object, and then subtract off the number of bits of
9849 the field itself. The result is the bit offset of
9850 the LSB of the field. */
9852 int bit_offset
= DW_UNSND (attr
);
9854 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9857 /* The size of the anonymous object containing
9858 the bit field is explicit, so use the
9859 indicated size (in bytes). */
9860 anonymous_size
= DW_UNSND (attr
);
9864 /* The size of the anonymous object containing
9865 the bit field must be inferred from the type
9866 attribute of the data member containing the
9868 anonymous_size
= TYPE_LENGTH (fp
->type
);
9870 SET_FIELD_BITPOS (*fp
,
9872 + anonymous_size
* bits_per_byte
9873 - bit_offset
- FIELD_BITSIZE (*fp
)));
9877 /* Get name of field. */
9878 fieldname
= dwarf2_name (die
, cu
);
9879 if (fieldname
== NULL
)
9882 /* The name is already allocated along with this objfile, so we don't
9883 need to duplicate it for the type. */
9884 fp
->name
= fieldname
;
9886 /* Change accessibility for artificial fields (e.g. virtual table
9887 pointer or virtual base class pointer) to private. */
9888 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
9890 FIELD_ARTIFICIAL (*fp
) = 1;
9891 new_field
->accessibility
= DW_ACCESS_private
;
9892 fip
->non_public_fields
= 1;
9895 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
9897 /* C++ static member. */
9899 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
9900 is a declaration, but all versions of G++ as of this writing
9901 (so through at least 3.2.1) incorrectly generate
9902 DW_TAG_variable tags. */
9904 const char *physname
;
9906 /* Get name of field. */
9907 fieldname
= dwarf2_name (die
, cu
);
9908 if (fieldname
== NULL
)
9911 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
9913 /* Only create a symbol if this is an external value.
9914 new_symbol checks this and puts the value in the global symbol
9915 table, which we want. If it is not external, new_symbol
9916 will try to put the value in cu->list_in_scope which is wrong. */
9917 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
9919 /* A static const member, not much different than an enum as far as
9920 we're concerned, except that we can support more types. */
9921 new_symbol (die
, NULL
, cu
);
9924 /* Get physical name. */
9925 physname
= dwarf2_physname (fieldname
, die
, cu
);
9927 /* The name is already allocated along with this objfile, so we don't
9928 need to duplicate it for the type. */
9929 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
9930 FIELD_TYPE (*fp
) = die_type (die
, cu
);
9931 FIELD_NAME (*fp
) = fieldname
;
9933 else if (die
->tag
== DW_TAG_inheritance
)
9937 /* C++ base class field. */
9938 if (handle_data_member_location (die
, cu
, &offset
))
9939 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
9940 FIELD_BITSIZE (*fp
) = 0;
9941 FIELD_TYPE (*fp
) = die_type (die
, cu
);
9942 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
9943 fip
->nbaseclasses
++;
9947 /* Add a typedef defined in the scope of the FIP's class. */
9950 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
9951 struct dwarf2_cu
*cu
)
9953 struct objfile
*objfile
= cu
->objfile
;
9954 struct typedef_field_list
*new_field
;
9955 struct attribute
*attr
;
9956 struct typedef_field
*fp
;
9957 char *fieldname
= "";
9959 /* Allocate a new field list entry and link it in. */
9960 new_field
= xzalloc (sizeof (*new_field
));
9961 make_cleanup (xfree
, new_field
);
9963 gdb_assert (die
->tag
== DW_TAG_typedef
);
9965 fp
= &new_field
->field
;
9967 /* Get name of field. */
9968 fp
->name
= dwarf2_name (die
, cu
);
9969 if (fp
->name
== NULL
)
9972 fp
->type
= read_type_die (die
, cu
);
9974 new_field
->next
= fip
->typedef_field_list
;
9975 fip
->typedef_field_list
= new_field
;
9976 fip
->typedef_field_list_count
++;
9979 /* Create the vector of fields, and attach it to the type. */
9982 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
9983 struct dwarf2_cu
*cu
)
9985 int nfields
= fip
->nfields
;
9987 /* Record the field count, allocate space for the array of fields,
9988 and create blank accessibility bitfields if necessary. */
9989 TYPE_NFIELDS (type
) = nfields
;
9990 TYPE_FIELDS (type
) = (struct field
*)
9991 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
9992 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
9994 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
9996 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
9998 TYPE_FIELD_PRIVATE_BITS (type
) =
9999 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10000 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
10002 TYPE_FIELD_PROTECTED_BITS (type
) =
10003 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10004 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
10006 TYPE_FIELD_IGNORE_BITS (type
) =
10007 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
10008 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
10011 /* If the type has baseclasses, allocate and clear a bit vector for
10012 TYPE_FIELD_VIRTUAL_BITS. */
10013 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
10015 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
10016 unsigned char *pointer
;
10018 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10019 pointer
= TYPE_ALLOC (type
, num_bytes
);
10020 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
10021 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
10022 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
10025 /* Copy the saved-up fields into the field vector. Start from the head of
10026 the list, adding to the tail of the field array, so that they end up in
10027 the same order in the array in which they were added to the list. */
10028 while (nfields
-- > 0)
10030 struct nextfield
*fieldp
;
10034 fieldp
= fip
->fields
;
10035 fip
->fields
= fieldp
->next
;
10039 fieldp
= fip
->baseclasses
;
10040 fip
->baseclasses
= fieldp
->next
;
10043 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
10044 switch (fieldp
->accessibility
)
10046 case DW_ACCESS_private
:
10047 if (cu
->language
!= language_ada
)
10048 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
10051 case DW_ACCESS_protected
:
10052 if (cu
->language
!= language_ada
)
10053 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
10056 case DW_ACCESS_public
:
10060 /* Unknown accessibility. Complain and treat it as public. */
10062 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
10063 fieldp
->accessibility
);
10067 if (nfields
< fip
->nbaseclasses
)
10069 switch (fieldp
->virtuality
)
10071 case DW_VIRTUALITY_virtual
:
10072 case DW_VIRTUALITY_pure_virtual
:
10073 if (cu
->language
== language_ada
)
10074 error (_("unexpected virtuality in component of Ada type"));
10075 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
10082 /* Add a member function to the proper fieldlist. */
10085 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
10086 struct type
*type
, struct dwarf2_cu
*cu
)
10088 struct objfile
*objfile
= cu
->objfile
;
10089 struct attribute
*attr
;
10090 struct fnfieldlist
*flp
;
10092 struct fn_field
*fnp
;
10094 struct nextfnfield
*new_fnfield
;
10095 struct type
*this_type
;
10096 enum dwarf_access_attribute accessibility
;
10098 if (cu
->language
== language_ada
)
10099 error (_("unexpected member function in Ada type"));
10101 /* Get name of member function. */
10102 fieldname
= dwarf2_name (die
, cu
);
10103 if (fieldname
== NULL
)
10106 /* Look up member function name in fieldlist. */
10107 for (i
= 0; i
< fip
->nfnfields
; i
++)
10109 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
10113 /* Create new list element if necessary. */
10114 if (i
< fip
->nfnfields
)
10115 flp
= &fip
->fnfieldlists
[i
];
10118 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10120 fip
->fnfieldlists
= (struct fnfieldlist
*)
10121 xrealloc (fip
->fnfieldlists
,
10122 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
10123 * sizeof (struct fnfieldlist
));
10124 if (fip
->nfnfields
== 0)
10125 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
10127 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
10128 flp
->name
= fieldname
;
10131 i
= fip
->nfnfields
++;
10134 /* Create a new member function field and chain it to the field list
10136 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
10137 make_cleanup (xfree
, new_fnfield
);
10138 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
10139 new_fnfield
->next
= flp
->head
;
10140 flp
->head
= new_fnfield
;
10143 /* Fill in the member function field info. */
10144 fnp
= &new_fnfield
->fnfield
;
10146 /* Delay processing of the physname until later. */
10147 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
10149 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
10154 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
10155 fnp
->physname
= physname
? physname
: "";
10158 fnp
->type
= alloc_type (objfile
);
10159 this_type
= read_type_die (die
, cu
);
10160 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
10162 int nparams
= TYPE_NFIELDS (this_type
);
10164 /* TYPE is the domain of this method, and THIS_TYPE is the type
10165 of the method itself (TYPE_CODE_METHOD). */
10166 smash_to_method_type (fnp
->type
, type
,
10167 TYPE_TARGET_TYPE (this_type
),
10168 TYPE_FIELDS (this_type
),
10169 TYPE_NFIELDS (this_type
),
10170 TYPE_VARARGS (this_type
));
10172 /* Handle static member functions.
10173 Dwarf2 has no clean way to discern C++ static and non-static
10174 member functions. G++ helps GDB by marking the first
10175 parameter for non-static member functions (which is the this
10176 pointer) as artificial. We obtain this information from
10177 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
10178 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
10179 fnp
->voffset
= VOFFSET_STATIC
;
10182 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
10183 dwarf2_full_name (fieldname
, die
, cu
));
10185 /* Get fcontext from DW_AT_containing_type if present. */
10186 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10187 fnp
->fcontext
= die_containing_type (die
, cu
);
10189 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
10190 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
10192 /* Get accessibility. */
10193 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
10195 accessibility
= DW_UNSND (attr
);
10197 accessibility
= dwarf2_default_access_attribute (die
, cu
);
10198 switch (accessibility
)
10200 case DW_ACCESS_private
:
10201 fnp
->is_private
= 1;
10203 case DW_ACCESS_protected
:
10204 fnp
->is_protected
= 1;
10208 /* Check for artificial methods. */
10209 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
10210 if (attr
&& DW_UNSND (attr
) != 0)
10211 fnp
->is_artificial
= 1;
10213 /* Get index in virtual function table if it is a virtual member
10214 function. For older versions of GCC, this is an offset in the
10215 appropriate virtual table, as specified by DW_AT_containing_type.
10216 For everyone else, it is an expression to be evaluated relative
10217 to the object address. */
10219 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
10222 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
10224 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
10226 /* Old-style GCC. */
10227 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
10229 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
10230 || (DW_BLOCK (attr
)->size
> 1
10231 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
10232 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
10234 struct dwarf_block blk
;
10237 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
10239 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
10240 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
10241 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
10242 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
10243 dwarf2_complex_location_expr_complaint ();
10245 fnp
->voffset
/= cu
->header
.addr_size
;
10249 dwarf2_complex_location_expr_complaint ();
10251 if (!fnp
->fcontext
)
10252 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
10254 else if (attr_form_is_section_offset (attr
))
10256 dwarf2_complex_location_expr_complaint ();
10260 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
10266 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
10267 if (attr
&& DW_UNSND (attr
))
10269 /* GCC does this, as of 2008-08-25; PR debug/37237. */
10270 complaint (&symfile_complaints
,
10271 _("Member function \"%s\" (offset %d) is virtual "
10272 "but the vtable offset is not specified"),
10273 fieldname
, die
->offset
.sect_off
);
10274 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10275 TYPE_CPLUS_DYNAMIC (type
) = 1;
10280 /* Create the vector of member function fields, and attach it to the type. */
10283 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
10284 struct dwarf2_cu
*cu
)
10286 struct fnfieldlist
*flp
;
10289 if (cu
->language
== language_ada
)
10290 error (_("unexpected member functions in Ada type"));
10292 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10293 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
10294 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
10296 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
10298 struct nextfnfield
*nfp
= flp
->head
;
10299 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
10302 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
10303 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
10304 fn_flp
->fn_fields
= (struct fn_field
*)
10305 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
10306 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
10307 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
10310 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
10313 /* Returns non-zero if NAME is the name of a vtable member in CU's
10314 language, zero otherwise. */
10316 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
10318 static const char vptr
[] = "_vptr";
10319 static const char vtable
[] = "vtable";
10321 /* Look for the C++ and Java forms of the vtable. */
10322 if ((cu
->language
== language_java
10323 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
10324 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
10325 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
10331 /* GCC outputs unnamed structures that are really pointers to member
10332 functions, with the ABI-specified layout. If TYPE describes
10333 such a structure, smash it into a member function type.
10335 GCC shouldn't do this; it should just output pointer to member DIEs.
10336 This is GCC PR debug/28767. */
10339 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
10341 struct type
*pfn_type
, *domain_type
, *new_type
;
10343 /* Check for a structure with no name and two children. */
10344 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
10347 /* Check for __pfn and __delta members. */
10348 if (TYPE_FIELD_NAME (type
, 0) == NULL
10349 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
10350 || TYPE_FIELD_NAME (type
, 1) == NULL
10351 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
10354 /* Find the type of the method. */
10355 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
10356 if (pfn_type
== NULL
10357 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
10358 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
10361 /* Look for the "this" argument. */
10362 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
10363 if (TYPE_NFIELDS (pfn_type
) == 0
10364 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
10365 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
10368 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
10369 new_type
= alloc_type (objfile
);
10370 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
10371 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
10372 TYPE_VARARGS (pfn_type
));
10373 smash_to_methodptr_type (type
, new_type
);
10376 /* Return non-zero if the CU's PRODUCER string matches the Intel C/C++ compiler
10380 producer_is_icc (struct dwarf2_cu
*cu
)
10382 if (!cu
->checked_producer
)
10383 check_producer (cu
);
10385 return cu
->producer_is_icc
;
10388 /* Called when we find the DIE that starts a structure or union scope
10389 (definition) to create a type for the structure or union. Fill in
10390 the type's name and general properties; the members will not be
10391 processed until process_structure_type.
10393 NOTE: we need to call these functions regardless of whether or not the
10394 DIE has a DW_AT_name attribute, since it might be an anonymous
10395 structure or union. This gets the type entered into our set of
10396 user defined types.
10398 However, if the structure is incomplete (an opaque struct/union)
10399 then suppress creating a symbol table entry for it since gdb only
10400 wants to find the one with the complete definition. Note that if
10401 it is complete, we just call new_symbol, which does it's own
10402 checking about whether the struct/union is anonymous or not (and
10403 suppresses creating a symbol table entry itself). */
10405 static struct type
*
10406 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10408 struct objfile
*objfile
= cu
->objfile
;
10410 struct attribute
*attr
;
10413 /* If the definition of this type lives in .debug_types, read that type.
10414 Don't follow DW_AT_specification though, that will take us back up
10415 the chain and we want to go down. */
10416 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
10419 struct dwarf2_cu
*type_cu
= cu
;
10420 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
10422 /* We could just recurse on read_structure_type, but we need to call
10423 get_die_type to ensure only one type for this DIE is created.
10424 This is important, for example, because for c++ classes we need
10425 TYPE_NAME set which is only done by new_symbol. Blech. */
10426 type
= read_type_die (type_die
, type_cu
);
10428 /* TYPE_CU may not be the same as CU.
10429 Ensure TYPE is recorded in CU's type_hash table. */
10430 return set_die_type (die
, type
, cu
);
10433 type
= alloc_type (objfile
);
10434 INIT_CPLUS_SPECIFIC (type
);
10436 name
= dwarf2_name (die
, cu
);
10439 if (cu
->language
== language_cplus
10440 || cu
->language
== language_java
)
10442 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
10444 /* dwarf2_full_name might have already finished building the DIE's
10445 type. If so, there is no need to continue. */
10446 if (get_die_type (die
, cu
) != NULL
)
10447 return get_die_type (die
, cu
);
10449 TYPE_TAG_NAME (type
) = full_name
;
10450 if (die
->tag
== DW_TAG_structure_type
10451 || die
->tag
== DW_TAG_class_type
)
10452 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
10456 /* The name is already allocated along with this objfile, so
10457 we don't need to duplicate it for the type. */
10458 TYPE_TAG_NAME (type
) = (char *) name
;
10459 if (die
->tag
== DW_TAG_class_type
)
10460 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
10464 if (die
->tag
== DW_TAG_structure_type
)
10466 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10468 else if (die
->tag
== DW_TAG_union_type
)
10470 TYPE_CODE (type
) = TYPE_CODE_UNION
;
10474 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
10477 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
10478 TYPE_DECLARED_CLASS (type
) = 1;
10480 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10483 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10487 TYPE_LENGTH (type
) = 0;
10490 if (producer_is_icc (cu
))
10492 /* ICC does not output the required DW_AT_declaration
10493 on incomplete types, but gives them a size of zero. */
10496 TYPE_STUB_SUPPORTED (type
) = 1;
10498 if (die_is_declaration (die
, cu
))
10499 TYPE_STUB (type
) = 1;
10500 else if (attr
== NULL
&& die
->child
== NULL
10501 && producer_is_realview (cu
->producer
))
10502 /* RealView does not output the required DW_AT_declaration
10503 on incomplete types. */
10504 TYPE_STUB (type
) = 1;
10506 /* We need to add the type field to the die immediately so we don't
10507 infinitely recurse when dealing with pointers to the structure
10508 type within the structure itself. */
10509 set_die_type (die
, type
, cu
);
10511 /* set_die_type should be already done. */
10512 set_descriptive_type (type
, die
, cu
);
10517 /* Finish creating a structure or union type, including filling in
10518 its members and creating a symbol for it. */
10521 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10523 struct objfile
*objfile
= cu
->objfile
;
10524 struct die_info
*child_die
= die
->child
;
10527 type
= get_die_type (die
, cu
);
10529 type
= read_structure_type (die
, cu
);
10531 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
10533 struct field_info fi
;
10534 struct die_info
*child_die
;
10535 VEC (symbolp
) *template_args
= NULL
;
10536 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
10538 memset (&fi
, 0, sizeof (struct field_info
));
10540 child_die
= die
->child
;
10542 while (child_die
&& child_die
->tag
)
10544 if (child_die
->tag
== DW_TAG_member
10545 || child_die
->tag
== DW_TAG_variable
)
10547 /* NOTE: carlton/2002-11-05: A C++ static data member
10548 should be a DW_TAG_member that is a declaration, but
10549 all versions of G++ as of this writing (so through at
10550 least 3.2.1) incorrectly generate DW_TAG_variable
10551 tags for them instead. */
10552 dwarf2_add_field (&fi
, child_die
, cu
);
10554 else if (child_die
->tag
== DW_TAG_subprogram
)
10556 /* C++ member function. */
10557 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
10559 else if (child_die
->tag
== DW_TAG_inheritance
)
10561 /* C++ base class field. */
10562 dwarf2_add_field (&fi
, child_die
, cu
);
10564 else if (child_die
->tag
== DW_TAG_typedef
)
10565 dwarf2_add_typedef (&fi
, child_die
, cu
);
10566 else if (child_die
->tag
== DW_TAG_template_type_param
10567 || child_die
->tag
== DW_TAG_template_value_param
)
10569 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
10572 VEC_safe_push (symbolp
, template_args
, arg
);
10575 child_die
= sibling_die (child_die
);
10578 /* Attach template arguments to type. */
10579 if (! VEC_empty (symbolp
, template_args
))
10581 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10582 TYPE_N_TEMPLATE_ARGUMENTS (type
)
10583 = VEC_length (symbolp
, template_args
);
10584 TYPE_TEMPLATE_ARGUMENTS (type
)
10585 = obstack_alloc (&objfile
->objfile_obstack
,
10586 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
10587 * sizeof (struct symbol
*)));
10588 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
10589 VEC_address (symbolp
, template_args
),
10590 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
10591 * sizeof (struct symbol
*)));
10592 VEC_free (symbolp
, template_args
);
10595 /* Attach fields and member functions to the type. */
10597 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
10600 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
10602 /* Get the type which refers to the base class (possibly this
10603 class itself) which contains the vtable pointer for the current
10604 class from the DW_AT_containing_type attribute. This use of
10605 DW_AT_containing_type is a GNU extension. */
10607 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
10609 struct type
*t
= die_containing_type (die
, cu
);
10611 TYPE_VPTR_BASETYPE (type
) = t
;
10616 /* Our own class provides vtbl ptr. */
10617 for (i
= TYPE_NFIELDS (t
) - 1;
10618 i
>= TYPE_N_BASECLASSES (t
);
10621 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
10623 if (is_vtable_name (fieldname
, cu
))
10625 TYPE_VPTR_FIELDNO (type
) = i
;
10630 /* Complain if virtual function table field not found. */
10631 if (i
< TYPE_N_BASECLASSES (t
))
10632 complaint (&symfile_complaints
,
10633 _("virtual function table pointer "
10634 "not found when defining class '%s'"),
10635 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
10640 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
10643 else if (cu
->producer
10644 && strncmp (cu
->producer
,
10645 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
10647 /* The IBM XLC compiler does not provide direct indication
10648 of the containing type, but the vtable pointer is
10649 always named __vfp. */
10653 for (i
= TYPE_NFIELDS (type
) - 1;
10654 i
>= TYPE_N_BASECLASSES (type
);
10657 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
10659 TYPE_VPTR_FIELDNO (type
) = i
;
10660 TYPE_VPTR_BASETYPE (type
) = type
;
10667 /* Copy fi.typedef_field_list linked list elements content into the
10668 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
10669 if (fi
.typedef_field_list
)
10671 int i
= fi
.typedef_field_list_count
;
10673 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
10674 TYPE_TYPEDEF_FIELD_ARRAY (type
)
10675 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
10676 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
10678 /* Reverse the list order to keep the debug info elements order. */
10681 struct typedef_field
*dest
, *src
;
10683 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
10684 src
= &fi
.typedef_field_list
->field
;
10685 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
10690 do_cleanups (back_to
);
10692 if (HAVE_CPLUS_STRUCT (type
))
10693 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
10696 quirk_gcc_member_function_pointer (type
, objfile
);
10698 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
10699 snapshots) has been known to create a die giving a declaration
10700 for a class that has, as a child, a die giving a definition for a
10701 nested class. So we have to process our children even if the
10702 current die is a declaration. Normally, of course, a declaration
10703 won't have any children at all. */
10705 while (child_die
!= NULL
&& child_die
->tag
)
10707 if (child_die
->tag
== DW_TAG_member
10708 || child_die
->tag
== DW_TAG_variable
10709 || child_die
->tag
== DW_TAG_inheritance
10710 || child_die
->tag
== DW_TAG_template_value_param
10711 || child_die
->tag
== DW_TAG_template_type_param
)
10716 process_die (child_die
, cu
);
10718 child_die
= sibling_die (child_die
);
10721 /* Do not consider external references. According to the DWARF standard,
10722 these DIEs are identified by the fact that they have no byte_size
10723 attribute, and a declaration attribute. */
10724 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
10725 || !die_is_declaration (die
, cu
))
10726 new_symbol (die
, type
, cu
);
10729 /* Given a DW_AT_enumeration_type die, set its type. We do not
10730 complete the type's fields yet, or create any symbols. */
10732 static struct type
*
10733 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10735 struct objfile
*objfile
= cu
->objfile
;
10737 struct attribute
*attr
;
10740 /* If the definition of this type lives in .debug_types, read that type.
10741 Don't follow DW_AT_specification though, that will take us back up
10742 the chain and we want to go down. */
10743 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
10746 struct dwarf2_cu
*type_cu
= cu
;
10747 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
10749 type
= read_type_die (type_die
, type_cu
);
10751 /* TYPE_CU may not be the same as CU.
10752 Ensure TYPE is recorded in CU's type_hash table. */
10753 return set_die_type (die
, type
, cu
);
10756 type
= alloc_type (objfile
);
10758 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
10759 name
= dwarf2_full_name (NULL
, die
, cu
);
10761 TYPE_TAG_NAME (type
) = (char *) name
;
10763 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10766 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10770 TYPE_LENGTH (type
) = 0;
10773 /* The enumeration DIE can be incomplete. In Ada, any type can be
10774 declared as private in the package spec, and then defined only
10775 inside the package body. Such types are known as Taft Amendment
10776 Types. When another package uses such a type, an incomplete DIE
10777 may be generated by the compiler. */
10778 if (die_is_declaration (die
, cu
))
10779 TYPE_STUB (type
) = 1;
10781 return set_die_type (die
, type
, cu
);
10784 /* Given a pointer to a die which begins an enumeration, process all
10785 the dies that define the members of the enumeration, and create the
10786 symbol for the enumeration type.
10788 NOTE: We reverse the order of the element list. */
10791 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10793 struct type
*this_type
;
10795 this_type
= get_die_type (die
, cu
);
10796 if (this_type
== NULL
)
10797 this_type
= read_enumeration_type (die
, cu
);
10799 if (die
->child
!= NULL
)
10801 struct die_info
*child_die
;
10802 struct symbol
*sym
;
10803 struct field
*fields
= NULL
;
10804 int num_fields
= 0;
10805 int unsigned_enum
= 1;
10810 child_die
= die
->child
;
10811 while (child_die
&& child_die
->tag
)
10813 if (child_die
->tag
!= DW_TAG_enumerator
)
10815 process_die (child_die
, cu
);
10819 name
= dwarf2_name (child_die
, cu
);
10822 sym
= new_symbol (child_die
, this_type
, cu
);
10823 if (SYMBOL_VALUE (sym
) < 0)
10828 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
10831 mask
|= SYMBOL_VALUE (sym
);
10833 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
10835 fields
= (struct field
*)
10837 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
10838 * sizeof (struct field
));
10841 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
10842 FIELD_TYPE (fields
[num_fields
]) = NULL
;
10843 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
10844 FIELD_BITSIZE (fields
[num_fields
]) = 0;
10850 child_die
= sibling_die (child_die
);
10855 TYPE_NFIELDS (this_type
) = num_fields
;
10856 TYPE_FIELDS (this_type
) = (struct field
*)
10857 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
10858 memcpy (TYPE_FIELDS (this_type
), fields
,
10859 sizeof (struct field
) * num_fields
);
10863 TYPE_UNSIGNED (this_type
) = 1;
10865 TYPE_FLAG_ENUM (this_type
) = 1;
10868 /* If we are reading an enum from a .debug_types unit, and the enum
10869 is a declaration, and the enum is not the signatured type in the
10870 unit, then we do not want to add a symbol for it. Adding a
10871 symbol would in some cases obscure the true definition of the
10872 enum, giving users an incomplete type when the definition is
10873 actually available. Note that we do not want to do this for all
10874 enums which are just declarations, because C++0x allows forward
10875 enum declarations. */
10876 if (cu
->per_cu
->is_debug_types
10877 && die_is_declaration (die
, cu
))
10879 struct signatured_type
*sig_type
;
10882 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
10883 cu
->per_cu
->info_or_types_section
,
10884 cu
->per_cu
->offset
);
10885 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
10886 if (sig_type
->type_offset_in_section
.sect_off
!= die
->offset
.sect_off
)
10890 new_symbol (die
, this_type
, cu
);
10893 /* Extract all information from a DW_TAG_array_type DIE and put it in
10894 the DIE's type field. For now, this only handles one dimensional
10897 static struct type
*
10898 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10900 struct objfile
*objfile
= cu
->objfile
;
10901 struct die_info
*child_die
;
10903 struct type
*element_type
, *range_type
, *index_type
;
10904 struct type
**range_types
= NULL
;
10905 struct attribute
*attr
;
10907 struct cleanup
*back_to
;
10910 element_type
= die_type (die
, cu
);
10912 /* The die_type call above may have already set the type for this DIE. */
10913 type
= get_die_type (die
, cu
);
10917 /* Irix 6.2 native cc creates array types without children for
10918 arrays with unspecified length. */
10919 if (die
->child
== NULL
)
10921 index_type
= objfile_type (objfile
)->builtin_int
;
10922 range_type
= create_range_type (NULL
, index_type
, 0, -1);
10923 type
= create_array_type (NULL
, element_type
, range_type
);
10924 return set_die_type (die
, type
, cu
);
10927 back_to
= make_cleanup (null_cleanup
, NULL
);
10928 child_die
= die
->child
;
10929 while (child_die
&& child_die
->tag
)
10931 if (child_die
->tag
== DW_TAG_subrange_type
)
10933 struct type
*child_type
= read_type_die (child_die
, cu
);
10935 if (child_type
!= NULL
)
10937 /* The range type was succesfully read. Save it for the
10938 array type creation. */
10939 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
10941 range_types
= (struct type
**)
10942 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
10943 * sizeof (struct type
*));
10945 make_cleanup (free_current_contents
, &range_types
);
10947 range_types
[ndim
++] = child_type
;
10950 child_die
= sibling_die (child_die
);
10953 /* Dwarf2 dimensions are output from left to right, create the
10954 necessary array types in backwards order. */
10956 type
= element_type
;
10958 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
10963 type
= create_array_type (NULL
, type
, range_types
[i
++]);
10968 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
10971 /* Understand Dwarf2 support for vector types (like they occur on
10972 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
10973 array type. This is not part of the Dwarf2/3 standard yet, but a
10974 custom vendor extension. The main difference between a regular
10975 array and the vector variant is that vectors are passed by value
10977 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
10979 make_vector_type (type
);
10981 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
10982 implementation may choose to implement triple vectors using this
10984 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
10987 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
10988 TYPE_LENGTH (type
) = DW_UNSND (attr
);
10990 complaint (&symfile_complaints
,
10991 _("DW_AT_byte_size for array type smaller "
10992 "than the total size of elements"));
10995 name
= dwarf2_name (die
, cu
);
10997 TYPE_NAME (type
) = name
;
10999 /* Install the type in the die. */
11000 set_die_type (die
, type
, cu
);
11002 /* set_die_type should be already done. */
11003 set_descriptive_type (type
, die
, cu
);
11005 do_cleanups (back_to
);
11010 static enum dwarf_array_dim_ordering
11011 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
11013 struct attribute
*attr
;
11015 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
11017 if (attr
) return DW_SND (attr
);
11019 /* GNU F77 is a special case, as at 08/2004 array type info is the
11020 opposite order to the dwarf2 specification, but data is still
11021 laid out as per normal fortran.
11023 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
11024 version checking. */
11026 if (cu
->language
== language_fortran
11027 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
11029 return DW_ORD_row_major
;
11032 switch (cu
->language_defn
->la_array_ordering
)
11034 case array_column_major
:
11035 return DW_ORD_col_major
;
11036 case array_row_major
:
11038 return DW_ORD_row_major
;
11042 /* Extract all information from a DW_TAG_set_type DIE and put it in
11043 the DIE's type field. */
11045 static struct type
*
11046 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11048 struct type
*domain_type
, *set_type
;
11049 struct attribute
*attr
;
11051 domain_type
= die_type (die
, cu
);
11053 /* The die_type call above may have already set the type for this DIE. */
11054 set_type
= get_die_type (die
, cu
);
11058 set_type
= create_set_type (NULL
, domain_type
);
11060 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11062 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
11064 return set_die_type (die
, set_type
, cu
);
11067 /* Create appropriate locally-scoped variables for all the
11068 DW_TAG_common_block entries. Also create a struct common_block
11069 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
11070 is used to sepate the common blocks name namespace from regular
11074 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
11076 if (die
->child
!= NULL
)
11078 struct objfile
*objfile
= cu
->objfile
;
11079 struct die_info
*child_die
;
11080 size_t n_entries
= 0, size
;
11081 struct common_block
*common_block
;
11082 struct symbol
*sym
;
11084 for (child_die
= die
->child
;
11085 child_die
&& child_die
->tag
;
11086 child_die
= sibling_die (child_die
))
11089 size
= (sizeof (struct common_block
)
11090 + (n_entries
- 1) * sizeof (struct symbol
*));
11091 common_block
= obstack_alloc (&objfile
->objfile_obstack
, size
);
11092 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
11093 common_block
->n_entries
= 0;
11095 for (child_die
= die
->child
;
11096 child_die
&& child_die
->tag
;
11097 child_die
= sibling_die (child_die
))
11099 /* Create the symbol in the DW_TAG_common_block block in the current
11101 sym
= new_symbol (child_die
, NULL
, cu
);
11103 common_block
->contents
[common_block
->n_entries
++] = sym
;
11106 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
11107 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
11111 /* Create a type for a C++ namespace. */
11113 static struct type
*
11114 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11116 struct objfile
*objfile
= cu
->objfile
;
11117 const char *previous_prefix
, *name
;
11121 /* For extensions, reuse the type of the original namespace. */
11122 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
11124 struct die_info
*ext_die
;
11125 struct dwarf2_cu
*ext_cu
= cu
;
11127 ext_die
= dwarf2_extension (die
, &ext_cu
);
11128 type
= read_type_die (ext_die
, ext_cu
);
11130 /* EXT_CU may not be the same as CU.
11131 Ensure TYPE is recorded in CU's type_hash table. */
11132 return set_die_type (die
, type
, cu
);
11135 name
= namespace_name (die
, &is_anonymous
, cu
);
11137 /* Now build the name of the current namespace. */
11139 previous_prefix
= determine_prefix (die
, cu
);
11140 if (previous_prefix
[0] != '\0')
11141 name
= typename_concat (&objfile
->objfile_obstack
,
11142 previous_prefix
, name
, 0, cu
);
11144 /* Create the type. */
11145 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
11147 TYPE_NAME (type
) = (char *) name
;
11148 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
11150 return set_die_type (die
, type
, cu
);
11153 /* Read a C++ namespace. */
11156 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
11158 struct objfile
*objfile
= cu
->objfile
;
11161 /* Add a symbol associated to this if we haven't seen the namespace
11162 before. Also, add a using directive if it's an anonymous
11165 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
11169 type
= read_type_die (die
, cu
);
11170 new_symbol (die
, type
, cu
);
11172 namespace_name (die
, &is_anonymous
, cu
);
11175 const char *previous_prefix
= determine_prefix (die
, cu
);
11177 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
11178 NULL
, NULL
, &objfile
->objfile_obstack
);
11182 if (die
->child
!= NULL
)
11184 struct die_info
*child_die
= die
->child
;
11186 while (child_die
&& child_die
->tag
)
11188 process_die (child_die
, cu
);
11189 child_die
= sibling_die (child_die
);
11194 /* Read a Fortran module as type. This DIE can be only a declaration used for
11195 imported module. Still we need that type as local Fortran "use ... only"
11196 declaration imports depend on the created type in determine_prefix. */
11198 static struct type
*
11199 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11201 struct objfile
*objfile
= cu
->objfile
;
11205 module_name
= dwarf2_name (die
, cu
);
11207 complaint (&symfile_complaints
,
11208 _("DW_TAG_module has no name, offset 0x%x"),
11209 die
->offset
.sect_off
);
11210 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
11212 /* determine_prefix uses TYPE_TAG_NAME. */
11213 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
11215 return set_die_type (die
, type
, cu
);
11218 /* Read a Fortran module. */
11221 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
11223 struct die_info
*child_die
= die
->child
;
11225 while (child_die
&& child_die
->tag
)
11227 process_die (child_die
, cu
);
11228 child_die
= sibling_die (child_die
);
11232 /* Return the name of the namespace represented by DIE. Set
11233 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
11236 static const char *
11237 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
11239 struct die_info
*current_die
;
11240 const char *name
= NULL
;
11242 /* Loop through the extensions until we find a name. */
11244 for (current_die
= die
;
11245 current_die
!= NULL
;
11246 current_die
= dwarf2_extension (die
, &cu
))
11248 name
= dwarf2_name (current_die
, cu
);
11253 /* Is it an anonymous namespace? */
11255 *is_anonymous
= (name
== NULL
);
11257 name
= CP_ANONYMOUS_NAMESPACE_STR
;
11262 /* Extract all information from a DW_TAG_pointer_type DIE and add to
11263 the user defined type vector. */
11265 static struct type
*
11266 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11268 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
11269 struct comp_unit_head
*cu_header
= &cu
->header
;
11271 struct attribute
*attr_byte_size
;
11272 struct attribute
*attr_address_class
;
11273 int byte_size
, addr_class
;
11274 struct type
*target_type
;
11276 target_type
= die_type (die
, cu
);
11278 /* The die_type call above may have already set the type for this DIE. */
11279 type
= get_die_type (die
, cu
);
11283 type
= lookup_pointer_type (target_type
);
11285 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11286 if (attr_byte_size
)
11287 byte_size
= DW_UNSND (attr_byte_size
);
11289 byte_size
= cu_header
->addr_size
;
11291 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
11292 if (attr_address_class
)
11293 addr_class
= DW_UNSND (attr_address_class
);
11295 addr_class
= DW_ADDR_none
;
11297 /* If the pointer size or address class is different than the
11298 default, create a type variant marked as such and set the
11299 length accordingly. */
11300 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
11302 if (gdbarch_address_class_type_flags_p (gdbarch
))
11306 type_flags
= gdbarch_address_class_type_flags
11307 (gdbarch
, byte_size
, addr_class
);
11308 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
11310 type
= make_type_with_address_space (type
, type_flags
);
11312 else if (TYPE_LENGTH (type
) != byte_size
)
11314 complaint (&symfile_complaints
,
11315 _("invalid pointer size %d"), byte_size
);
11319 /* Should we also complain about unhandled address classes? */
11323 TYPE_LENGTH (type
) = byte_size
;
11324 return set_die_type (die
, type
, cu
);
11327 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
11328 the user defined type vector. */
11330 static struct type
*
11331 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11334 struct type
*to_type
;
11335 struct type
*domain
;
11337 to_type
= die_type (die
, cu
);
11338 domain
= die_containing_type (die
, cu
);
11340 /* The calls above may have already set the type for this DIE. */
11341 type
= get_die_type (die
, cu
);
11345 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
11346 type
= lookup_methodptr_type (to_type
);
11348 type
= lookup_memberptr_type (to_type
, domain
);
11350 return set_die_type (die
, type
, cu
);
11353 /* Extract all information from a DW_TAG_reference_type DIE and add to
11354 the user defined type vector. */
11356 static struct type
*
11357 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11359 struct comp_unit_head
*cu_header
= &cu
->header
;
11360 struct type
*type
, *target_type
;
11361 struct attribute
*attr
;
11363 target_type
= die_type (die
, cu
);
11365 /* The die_type call above may have already set the type for this DIE. */
11366 type
= get_die_type (die
, cu
);
11370 type
= lookup_reference_type (target_type
);
11371 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11374 TYPE_LENGTH (type
) = DW_UNSND (attr
);
11378 TYPE_LENGTH (type
) = cu_header
->addr_size
;
11380 return set_die_type (die
, type
, cu
);
11383 static struct type
*
11384 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11386 struct type
*base_type
, *cv_type
;
11388 base_type
= die_type (die
, cu
);
11390 /* The die_type call above may have already set the type for this DIE. */
11391 cv_type
= get_die_type (die
, cu
);
11395 /* In case the const qualifier is applied to an array type, the element type
11396 is so qualified, not the array type (section 6.7.3 of C99). */
11397 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
11399 struct type
*el_type
, *inner_array
;
11401 base_type
= copy_type (base_type
);
11402 inner_array
= base_type
;
11404 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
11406 TYPE_TARGET_TYPE (inner_array
) =
11407 copy_type (TYPE_TARGET_TYPE (inner_array
));
11408 inner_array
= TYPE_TARGET_TYPE (inner_array
);
11411 el_type
= TYPE_TARGET_TYPE (inner_array
);
11412 TYPE_TARGET_TYPE (inner_array
) =
11413 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
11415 return set_die_type (die
, base_type
, cu
);
11418 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
11419 return set_die_type (die
, cv_type
, cu
);
11422 static struct type
*
11423 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11425 struct type
*base_type
, *cv_type
;
11427 base_type
= die_type (die
, cu
);
11429 /* The die_type call above may have already set the type for this DIE. */
11430 cv_type
= get_die_type (die
, cu
);
11434 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
11435 return set_die_type (die
, cv_type
, cu
);
11438 /* Extract all information from a DW_TAG_string_type DIE and add to
11439 the user defined type vector. It isn't really a user defined type,
11440 but it behaves like one, with other DIE's using an AT_user_def_type
11441 attribute to reference it. */
11443 static struct type
*
11444 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11446 struct objfile
*objfile
= cu
->objfile
;
11447 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11448 struct type
*type
, *range_type
, *index_type
, *char_type
;
11449 struct attribute
*attr
;
11450 unsigned int length
;
11452 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
11455 length
= DW_UNSND (attr
);
11459 /* Check for the DW_AT_byte_size attribute. */
11460 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11463 length
= DW_UNSND (attr
);
11471 index_type
= objfile_type (objfile
)->builtin_int
;
11472 range_type
= create_range_type (NULL
, index_type
, 1, length
);
11473 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
11474 type
= create_string_type (NULL
, char_type
, range_type
);
11476 return set_die_type (die
, type
, cu
);
11479 /* Handle DIES due to C code like:
11483 int (*funcp)(int a, long l);
11487 ('funcp' generates a DW_TAG_subroutine_type DIE). */
11489 static struct type
*
11490 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11492 struct objfile
*objfile
= cu
->objfile
;
11493 struct type
*type
; /* Type that this function returns. */
11494 struct type
*ftype
; /* Function that returns above type. */
11495 struct attribute
*attr
;
11497 type
= die_type (die
, cu
);
11499 /* The die_type call above may have already set the type for this DIE. */
11500 ftype
= get_die_type (die
, cu
);
11504 ftype
= lookup_function_type (type
);
11506 /* All functions in C++, Pascal and Java have prototypes. */
11507 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
11508 if ((attr
&& (DW_UNSND (attr
) != 0))
11509 || cu
->language
== language_cplus
11510 || cu
->language
== language_java
11511 || cu
->language
== language_pascal
)
11512 TYPE_PROTOTYPED (ftype
) = 1;
11513 else if (producer_is_realview (cu
->producer
))
11514 /* RealView does not emit DW_AT_prototyped. We can not
11515 distinguish prototyped and unprototyped functions; default to
11516 prototyped, since that is more common in modern code (and
11517 RealView warns about unprototyped functions). */
11518 TYPE_PROTOTYPED (ftype
) = 1;
11520 /* Store the calling convention in the type if it's available in
11521 the subroutine die. Otherwise set the calling convention to
11522 the default value DW_CC_normal. */
11523 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
11525 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
11526 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
11527 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
11529 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
11531 /* We need to add the subroutine type to the die immediately so
11532 we don't infinitely recurse when dealing with parameters
11533 declared as the same subroutine type. */
11534 set_die_type (die
, ftype
, cu
);
11536 if (die
->child
!= NULL
)
11538 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
11539 struct die_info
*child_die
;
11540 int nparams
, iparams
;
11542 /* Count the number of parameters.
11543 FIXME: GDB currently ignores vararg functions, but knows about
11544 vararg member functions. */
11546 child_die
= die
->child
;
11547 while (child_die
&& child_die
->tag
)
11549 if (child_die
->tag
== DW_TAG_formal_parameter
)
11551 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
11552 TYPE_VARARGS (ftype
) = 1;
11553 child_die
= sibling_die (child_die
);
11556 /* Allocate storage for parameters and fill them in. */
11557 TYPE_NFIELDS (ftype
) = nparams
;
11558 TYPE_FIELDS (ftype
) = (struct field
*)
11559 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
11561 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
11562 even if we error out during the parameters reading below. */
11563 for (iparams
= 0; iparams
< nparams
; iparams
++)
11564 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
11567 child_die
= die
->child
;
11568 while (child_die
&& child_die
->tag
)
11570 if (child_die
->tag
== DW_TAG_formal_parameter
)
11572 struct type
*arg_type
;
11574 /* DWARF version 2 has no clean way to discern C++
11575 static and non-static member functions. G++ helps
11576 GDB by marking the first parameter for non-static
11577 member functions (which is the this pointer) as
11578 artificial. We pass this information to
11579 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
11581 DWARF version 3 added DW_AT_object_pointer, which GCC
11582 4.5 does not yet generate. */
11583 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
11585 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
11588 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
11590 /* GCC/43521: In java, the formal parameter
11591 "this" is sometimes not marked with DW_AT_artificial. */
11592 if (cu
->language
== language_java
)
11594 const char *name
= dwarf2_name (child_die
, cu
);
11596 if (name
&& !strcmp (name
, "this"))
11597 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
11600 arg_type
= die_type (child_die
, cu
);
11602 /* RealView does not mark THIS as const, which the testsuite
11603 expects. GCC marks THIS as const in method definitions,
11604 but not in the class specifications (GCC PR 43053). */
11605 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
11606 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
11609 struct dwarf2_cu
*arg_cu
= cu
;
11610 const char *name
= dwarf2_name (child_die
, cu
);
11612 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
11615 /* If the compiler emits this, use it. */
11616 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
11619 else if (name
&& strcmp (name
, "this") == 0)
11620 /* Function definitions will have the argument names. */
11622 else if (name
== NULL
&& iparams
== 0)
11623 /* Declarations may not have the names, so like
11624 elsewhere in GDB, assume an artificial first
11625 argument is "this". */
11629 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
11633 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
11636 child_die
= sibling_die (child_die
);
11643 static struct type
*
11644 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
11646 struct objfile
*objfile
= cu
->objfile
;
11647 const char *name
= NULL
;
11648 struct type
*this_type
, *target_type
;
11650 name
= dwarf2_full_name (NULL
, die
, cu
);
11651 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
11652 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
11653 TYPE_NAME (this_type
) = (char *) name
;
11654 set_die_type (die
, this_type
, cu
);
11655 target_type
= die_type (die
, cu
);
11656 if (target_type
!= this_type
)
11657 TYPE_TARGET_TYPE (this_type
) = target_type
;
11660 /* Self-referential typedefs are, it seems, not allowed by the DWARF
11661 spec and cause infinite loops in GDB. */
11662 complaint (&symfile_complaints
,
11663 _("Self-referential DW_TAG_typedef "
11664 "- DIE at 0x%x [in module %s]"),
11665 die
->offset
.sect_off
, objfile
->name
);
11666 TYPE_TARGET_TYPE (this_type
) = NULL
;
11671 /* Find a representation of a given base type and install
11672 it in the TYPE field of the die. */
11674 static struct type
*
11675 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11677 struct objfile
*objfile
= cu
->objfile
;
11679 struct attribute
*attr
;
11680 int encoding
= 0, size
= 0;
11682 enum type_code code
= TYPE_CODE_INT
;
11683 int type_flags
= 0;
11684 struct type
*target_type
= NULL
;
11686 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
11689 encoding
= DW_UNSND (attr
);
11691 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11694 size
= DW_UNSND (attr
);
11696 name
= dwarf2_name (die
, cu
);
11699 complaint (&symfile_complaints
,
11700 _("DW_AT_name missing from DW_TAG_base_type"));
11705 case DW_ATE_address
:
11706 /* Turn DW_ATE_address into a void * pointer. */
11707 code
= TYPE_CODE_PTR
;
11708 type_flags
|= TYPE_FLAG_UNSIGNED
;
11709 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
11711 case DW_ATE_boolean
:
11712 code
= TYPE_CODE_BOOL
;
11713 type_flags
|= TYPE_FLAG_UNSIGNED
;
11715 case DW_ATE_complex_float
:
11716 code
= TYPE_CODE_COMPLEX
;
11717 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
11719 case DW_ATE_decimal_float
:
11720 code
= TYPE_CODE_DECFLOAT
;
11723 code
= TYPE_CODE_FLT
;
11725 case DW_ATE_signed
:
11727 case DW_ATE_unsigned
:
11728 type_flags
|= TYPE_FLAG_UNSIGNED
;
11729 if (cu
->language
== language_fortran
11731 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
11732 code
= TYPE_CODE_CHAR
;
11734 case DW_ATE_signed_char
:
11735 if (cu
->language
== language_ada
|| cu
->language
== language_m2
11736 || cu
->language
== language_pascal
11737 || cu
->language
== language_fortran
)
11738 code
= TYPE_CODE_CHAR
;
11740 case DW_ATE_unsigned_char
:
11741 if (cu
->language
== language_ada
|| cu
->language
== language_m2
11742 || cu
->language
== language_pascal
11743 || cu
->language
== language_fortran
)
11744 code
= TYPE_CODE_CHAR
;
11745 type_flags
|= TYPE_FLAG_UNSIGNED
;
11748 /* We just treat this as an integer and then recognize the
11749 type by name elsewhere. */
11753 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
11754 dwarf_type_encoding_name (encoding
));
11758 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
11759 TYPE_NAME (type
) = name
;
11760 TYPE_TARGET_TYPE (type
) = target_type
;
11762 if (name
&& strcmp (name
, "char") == 0)
11763 TYPE_NOSIGN (type
) = 1;
11765 return set_die_type (die
, type
, cu
);
11768 /* Read the given DW_AT_subrange DIE. */
11770 static struct type
*
11771 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11773 struct type
*base_type
;
11774 struct type
*range_type
;
11775 struct attribute
*attr
;
11777 int low_default_is_valid
;
11779 LONGEST negative_mask
;
11781 base_type
= die_type (die
, cu
);
11782 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
11783 check_typedef (base_type
);
11785 /* The die_type call above may have already set the type for this DIE. */
11786 range_type
= get_die_type (die
, cu
);
11790 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
11791 omitting DW_AT_lower_bound. */
11792 switch (cu
->language
)
11795 case language_cplus
:
11797 low_default_is_valid
= 1;
11799 case language_fortran
:
11801 low_default_is_valid
= 1;
11804 case language_java
:
11805 case language_objc
:
11807 low_default_is_valid
= (cu
->header
.version
>= 4);
11811 case language_pascal
:
11813 low_default_is_valid
= (cu
->header
.version
>= 4);
11817 low_default_is_valid
= 0;
11821 /* FIXME: For variable sized arrays either of these could be
11822 a variable rather than a constant value. We'll allow it,
11823 but we don't know how to handle it. */
11824 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
11826 low
= dwarf2_get_attr_constant_value (attr
, low
);
11827 else if (!low_default_is_valid
)
11828 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
11829 "- DIE at 0x%x [in module %s]"),
11830 die
->offset
.sect_off
, cu
->objfile
->name
);
11832 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
11835 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
11837 /* GCC encodes arrays with unspecified or dynamic length
11838 with a DW_FORM_block1 attribute or a reference attribute.
11839 FIXME: GDB does not yet know how to handle dynamic
11840 arrays properly, treat them as arrays with unspecified
11843 FIXME: jimb/2003-09-22: GDB does not really know
11844 how to handle arrays of unspecified length
11845 either; we just represent them as zero-length
11846 arrays. Choose an appropriate upper bound given
11847 the lower bound we've computed above. */
11851 high
= dwarf2_get_attr_constant_value (attr
, 1);
11855 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
11858 int count
= dwarf2_get_attr_constant_value (attr
, 1);
11859 high
= low
+ count
- 1;
11863 /* Unspecified array length. */
11868 /* Dwarf-2 specifications explicitly allows to create subrange types
11869 without specifying a base type.
11870 In that case, the base type must be set to the type of
11871 the lower bound, upper bound or count, in that order, if any of these
11872 three attributes references an object that has a type.
11873 If no base type is found, the Dwarf-2 specifications say that
11874 a signed integer type of size equal to the size of an address should
11876 For the following C code: `extern char gdb_int [];'
11877 GCC produces an empty range DIE.
11878 FIXME: muller/2010-05-28: Possible references to object for low bound,
11879 high bound or count are not yet handled by this code. */
11880 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
11882 struct objfile
*objfile
= cu
->objfile
;
11883 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11884 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
11885 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
11887 /* Test "int", "long int", and "long long int" objfile types,
11888 and select the first one having a size above or equal to the
11889 architecture address size. */
11890 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
11891 base_type
= int_type
;
11894 int_type
= objfile_type (objfile
)->builtin_long
;
11895 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
11896 base_type
= int_type
;
11899 int_type
= objfile_type (objfile
)->builtin_long_long
;
11900 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
11901 base_type
= int_type
;
11907 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
11908 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
11909 low
|= negative_mask
;
11910 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
11911 high
|= negative_mask
;
11913 range_type
= create_range_type (NULL
, base_type
, low
, high
);
11915 /* Mark arrays with dynamic length at least as an array of unspecified
11916 length. GDB could check the boundary but before it gets implemented at
11917 least allow accessing the array elements. */
11918 if (attr
&& attr_form_is_block (attr
))
11919 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
11921 /* Ada expects an empty array on no boundary attributes. */
11922 if (attr
== NULL
&& cu
->language
!= language_ada
)
11923 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
11925 name
= dwarf2_name (die
, cu
);
11927 TYPE_NAME (range_type
) = name
;
11929 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
11931 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
11933 set_die_type (die
, range_type
, cu
);
11935 /* set_die_type should be already done. */
11936 set_descriptive_type (range_type
, die
, cu
);
11941 static struct type
*
11942 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11946 /* For now, we only support the C meaning of an unspecified type: void. */
11948 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
11949 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
11951 return set_die_type (die
, type
, cu
);
11954 /* Read a single die and all its descendents. Set the die's sibling
11955 field to NULL; set other fields in the die correctly, and set all
11956 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
11957 location of the info_ptr after reading all of those dies. PARENT
11958 is the parent of the die in question. */
11960 static struct die_info
*
11961 read_die_and_children (const struct die_reader_specs
*reader
,
11962 gdb_byte
*info_ptr
,
11963 gdb_byte
**new_info_ptr
,
11964 struct die_info
*parent
)
11966 struct die_info
*die
;
11970 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
11973 *new_info_ptr
= cur_ptr
;
11976 store_in_ref_table (die
, reader
->cu
);
11979 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
11983 *new_info_ptr
= cur_ptr
;
11986 die
->sibling
= NULL
;
11987 die
->parent
= parent
;
11991 /* Read a die, all of its descendents, and all of its siblings; set
11992 all of the fields of all of the dies correctly. Arguments are as
11993 in read_die_and_children. */
11995 static struct die_info
*
11996 read_die_and_siblings (const struct die_reader_specs
*reader
,
11997 gdb_byte
*info_ptr
,
11998 gdb_byte
**new_info_ptr
,
11999 struct die_info
*parent
)
12001 struct die_info
*first_die
, *last_sibling
;
12004 cur_ptr
= info_ptr
;
12005 first_die
= last_sibling
= NULL
;
12009 struct die_info
*die
12010 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
12014 *new_info_ptr
= cur_ptr
;
12021 last_sibling
->sibling
= die
;
12023 last_sibling
= die
;
12027 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
12029 The caller is responsible for filling in the extra attributes
12030 and updating (*DIEP)->num_attrs.
12031 Set DIEP to point to a newly allocated die with its information,
12032 except for its child, sibling, and parent fields.
12033 Set HAS_CHILDREN to tell whether the die has children or not. */
12036 read_full_die_1 (const struct die_reader_specs
*reader
,
12037 struct die_info
**diep
, gdb_byte
*info_ptr
,
12038 int *has_children
, int num_extra_attrs
)
12040 unsigned int abbrev_number
, bytes_read
, i
;
12041 sect_offset offset
;
12042 struct abbrev_info
*abbrev
;
12043 struct die_info
*die
;
12044 struct dwarf2_cu
*cu
= reader
->cu
;
12045 bfd
*abfd
= reader
->abfd
;
12047 offset
.sect_off
= info_ptr
- reader
->buffer
;
12048 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
12049 info_ptr
+= bytes_read
;
12050 if (!abbrev_number
)
12057 abbrev
= abbrev_table_lookup_abbrev (cu
->abbrev_table
, abbrev_number
);
12059 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
12061 bfd_get_filename (abfd
));
12063 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
12064 die
->offset
= offset
;
12065 die
->tag
= abbrev
->tag
;
12066 die
->abbrev
= abbrev_number
;
12068 /* Make the result usable.
12069 The caller needs to update num_attrs after adding the extra
12071 die
->num_attrs
= abbrev
->num_attrs
;
12073 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
12074 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
12078 *has_children
= abbrev
->has_children
;
12082 /* Read a die and all its attributes.
12083 Set DIEP to point to a newly allocated die with its information,
12084 except for its child, sibling, and parent fields.
12085 Set HAS_CHILDREN to tell whether the die has children or not. */
12088 read_full_die (const struct die_reader_specs
*reader
,
12089 struct die_info
**diep
, gdb_byte
*info_ptr
,
12092 return read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
12095 /* Abbreviation tables.
12097 In DWARF version 2, the description of the debugging information is
12098 stored in a separate .debug_abbrev section. Before we read any
12099 dies from a section we read in all abbreviations and install them
12100 in a hash table. */
12102 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
12104 static struct abbrev_info
*
12105 abbrev_table_alloc_abbrev (struct abbrev_table
*abbrev_table
)
12107 struct abbrev_info
*abbrev
;
12109 abbrev
= (struct abbrev_info
*)
12110 obstack_alloc (&abbrev_table
->abbrev_obstack
, sizeof (struct abbrev_info
));
12111 memset (abbrev
, 0, sizeof (struct abbrev_info
));
12115 /* Add an abbreviation to the table. */
12118 abbrev_table_add_abbrev (struct abbrev_table
*abbrev_table
,
12119 unsigned int abbrev_number
,
12120 struct abbrev_info
*abbrev
)
12122 unsigned int hash_number
;
12124 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
12125 abbrev
->next
= abbrev_table
->abbrevs
[hash_number
];
12126 abbrev_table
->abbrevs
[hash_number
] = abbrev
;
12129 /* Look up an abbrev in the table.
12130 Returns NULL if the abbrev is not found. */
12132 static struct abbrev_info
*
12133 abbrev_table_lookup_abbrev (const struct abbrev_table
*abbrev_table
,
12134 unsigned int abbrev_number
)
12136 unsigned int hash_number
;
12137 struct abbrev_info
*abbrev
;
12139 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
12140 abbrev
= abbrev_table
->abbrevs
[hash_number
];
12144 if (abbrev
->number
== abbrev_number
)
12146 abbrev
= abbrev
->next
;
12151 /* Read in an abbrev table. */
12153 static struct abbrev_table
*
12154 abbrev_table_read_table (struct dwarf2_section_info
*section
,
12155 sect_offset offset
)
12157 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12158 bfd
*abfd
= section
->asection
->owner
;
12159 struct abbrev_table
*abbrev_table
;
12160 gdb_byte
*abbrev_ptr
;
12161 struct abbrev_info
*cur_abbrev
;
12162 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
12163 unsigned int abbrev_form
;
12164 struct attr_abbrev
*cur_attrs
;
12165 unsigned int allocated_attrs
;
12167 abbrev_table
= XMALLOC (struct abbrev_table
);
12168 abbrev_table
->offset
= offset
;
12169 obstack_init (&abbrev_table
->abbrev_obstack
);
12170 abbrev_table
->abbrevs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
12172 * sizeof (struct abbrev_info
*)));
12173 memset (abbrev_table
->abbrevs
, 0,
12174 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
12176 dwarf2_read_section (objfile
, section
);
12177 abbrev_ptr
= section
->buffer
+ offset
.sect_off
;
12178 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12179 abbrev_ptr
+= bytes_read
;
12181 allocated_attrs
= ATTR_ALLOC_CHUNK
;
12182 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
12184 /* Loop until we reach an abbrev number of 0. */
12185 while (abbrev_number
)
12187 cur_abbrev
= abbrev_table_alloc_abbrev (abbrev_table
);
12189 /* read in abbrev header */
12190 cur_abbrev
->number
= abbrev_number
;
12191 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12192 abbrev_ptr
+= bytes_read
;
12193 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
12196 /* now read in declarations */
12197 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12198 abbrev_ptr
+= bytes_read
;
12199 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12200 abbrev_ptr
+= bytes_read
;
12201 while (abbrev_name
)
12203 if (cur_abbrev
->num_attrs
== allocated_attrs
)
12205 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
12207 = xrealloc (cur_attrs
, (allocated_attrs
12208 * sizeof (struct attr_abbrev
)));
12211 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
12212 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
12213 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12214 abbrev_ptr
+= bytes_read
;
12215 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12216 abbrev_ptr
+= bytes_read
;
12219 cur_abbrev
->attrs
= obstack_alloc (&abbrev_table
->abbrev_obstack
,
12220 (cur_abbrev
->num_attrs
12221 * sizeof (struct attr_abbrev
)));
12222 memcpy (cur_abbrev
->attrs
, cur_attrs
,
12223 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
12225 abbrev_table_add_abbrev (abbrev_table
, abbrev_number
, cur_abbrev
);
12227 /* Get next abbreviation.
12228 Under Irix6 the abbreviations for a compilation unit are not
12229 always properly terminated with an abbrev number of 0.
12230 Exit loop if we encounter an abbreviation which we have
12231 already read (which means we are about to read the abbreviations
12232 for the next compile unit) or if the end of the abbreviation
12233 table is reached. */
12234 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
12236 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
12237 abbrev_ptr
+= bytes_read
;
12238 if (abbrev_table_lookup_abbrev (abbrev_table
, abbrev_number
) != NULL
)
12243 return abbrev_table
;
12246 /* Free the resources held by ABBREV_TABLE. */
12249 abbrev_table_free (struct abbrev_table
*abbrev_table
)
12251 obstack_free (&abbrev_table
->abbrev_obstack
, NULL
);
12252 xfree (abbrev_table
);
12255 /* Same as abbrev_table_free but as a cleanup.
12256 We pass in a pointer to the pointer to the table so that we can
12257 set the pointer to NULL when we're done. It also simplifies
12258 build_type_unit_groups. */
12261 abbrev_table_free_cleanup (void *table_ptr
)
12263 struct abbrev_table
**abbrev_table_ptr
= table_ptr
;
12265 if (*abbrev_table_ptr
!= NULL
)
12266 abbrev_table_free (*abbrev_table_ptr
);
12267 *abbrev_table_ptr
= NULL
;
12270 /* Read the abbrev table for CU from ABBREV_SECTION. */
12273 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
,
12274 struct dwarf2_section_info
*abbrev_section
)
12277 abbrev_table_read_table (abbrev_section
, cu
->header
.abbrev_offset
);
12280 /* Release the memory used by the abbrev table for a compilation unit. */
12283 dwarf2_free_abbrev_table (void *ptr_to_cu
)
12285 struct dwarf2_cu
*cu
= ptr_to_cu
;
12287 abbrev_table_free (cu
->abbrev_table
);
12288 /* Set this to NULL so that we SEGV if we try to read it later,
12289 and also because free_comp_unit verifies this is NULL. */
12290 cu
->abbrev_table
= NULL
;
12293 /* Returns nonzero if TAG represents a type that we might generate a partial
12297 is_type_tag_for_partial (int tag
)
12302 /* Some types that would be reasonable to generate partial symbols for,
12303 that we don't at present. */
12304 case DW_TAG_array_type
:
12305 case DW_TAG_file_type
:
12306 case DW_TAG_ptr_to_member_type
:
12307 case DW_TAG_set_type
:
12308 case DW_TAG_string_type
:
12309 case DW_TAG_subroutine_type
:
12311 case DW_TAG_base_type
:
12312 case DW_TAG_class_type
:
12313 case DW_TAG_interface_type
:
12314 case DW_TAG_enumeration_type
:
12315 case DW_TAG_structure_type
:
12316 case DW_TAG_subrange_type
:
12317 case DW_TAG_typedef
:
12318 case DW_TAG_union_type
:
12325 /* Load all DIEs that are interesting for partial symbols into memory. */
12327 static struct partial_die_info
*
12328 load_partial_dies (const struct die_reader_specs
*reader
,
12329 gdb_byte
*info_ptr
, int building_psymtab
)
12331 struct dwarf2_cu
*cu
= reader
->cu
;
12332 struct objfile
*objfile
= cu
->objfile
;
12333 struct partial_die_info
*part_die
;
12334 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
12335 struct abbrev_info
*abbrev
;
12336 unsigned int bytes_read
;
12337 unsigned int load_all
= 0;
12338 int nesting_level
= 1;
12343 gdb_assert (cu
->per_cu
!= NULL
);
12344 if (cu
->per_cu
->load_all_dies
)
12348 = htab_create_alloc_ex (cu
->header
.length
/ 12,
12352 &cu
->comp_unit_obstack
,
12353 hashtab_obstack_allocate
,
12354 dummy_obstack_deallocate
);
12356 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
12357 sizeof (struct partial_die_info
));
12361 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
12363 /* A NULL abbrev means the end of a series of children. */
12364 if (abbrev
== NULL
)
12366 if (--nesting_level
== 0)
12368 /* PART_DIE was probably the last thing allocated on the
12369 comp_unit_obstack, so we could call obstack_free
12370 here. We don't do that because the waste is small,
12371 and will be cleaned up when we're done with this
12372 compilation unit. This way, we're also more robust
12373 against other users of the comp_unit_obstack. */
12376 info_ptr
+= bytes_read
;
12377 last_die
= parent_die
;
12378 parent_die
= parent_die
->die_parent
;
12382 /* Check for template arguments. We never save these; if
12383 they're seen, we just mark the parent, and go on our way. */
12384 if (parent_die
!= NULL
12385 && cu
->language
== language_cplus
12386 && (abbrev
->tag
== DW_TAG_template_type_param
12387 || abbrev
->tag
== DW_TAG_template_value_param
))
12389 parent_die
->has_template_arguments
= 1;
12393 /* We don't need a partial DIE for the template argument. */
12394 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
12399 /* We only recurse into c++ subprograms looking for template arguments.
12400 Skip their other children. */
12402 && cu
->language
== language_cplus
12403 && parent_die
!= NULL
12404 && parent_die
->tag
== DW_TAG_subprogram
)
12406 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
12410 /* Check whether this DIE is interesting enough to save. Normally
12411 we would not be interested in members here, but there may be
12412 later variables referencing them via DW_AT_specification (for
12413 static members). */
12415 && !is_type_tag_for_partial (abbrev
->tag
)
12416 && abbrev
->tag
!= DW_TAG_constant
12417 && abbrev
->tag
!= DW_TAG_enumerator
12418 && abbrev
->tag
!= DW_TAG_subprogram
12419 && abbrev
->tag
!= DW_TAG_lexical_block
12420 && abbrev
->tag
!= DW_TAG_variable
12421 && abbrev
->tag
!= DW_TAG_namespace
12422 && abbrev
->tag
!= DW_TAG_module
12423 && abbrev
->tag
!= DW_TAG_member
12424 && abbrev
->tag
!= DW_TAG_imported_unit
)
12426 /* Otherwise we skip to the next sibling, if any. */
12427 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
12431 info_ptr
= read_partial_die (reader
, part_die
, abbrev
, bytes_read
,
12434 /* This two-pass algorithm for processing partial symbols has a
12435 high cost in cache pressure. Thus, handle some simple cases
12436 here which cover the majority of C partial symbols. DIEs
12437 which neither have specification tags in them, nor could have
12438 specification tags elsewhere pointing at them, can simply be
12439 processed and discarded.
12441 This segment is also optional; scan_partial_symbols and
12442 add_partial_symbol will handle these DIEs if we chain
12443 them in normally. When compilers which do not emit large
12444 quantities of duplicate debug information are more common,
12445 this code can probably be removed. */
12447 /* Any complete simple types at the top level (pretty much all
12448 of them, for a language without namespaces), can be processed
12450 if (parent_die
== NULL
12451 && part_die
->has_specification
== 0
12452 && part_die
->is_declaration
== 0
12453 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
12454 || part_die
->tag
== DW_TAG_base_type
12455 || part_die
->tag
== DW_TAG_subrange_type
))
12457 if (building_psymtab
&& part_die
->name
!= NULL
)
12458 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
12459 VAR_DOMAIN
, LOC_TYPEDEF
,
12460 &objfile
->static_psymbols
,
12461 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
12462 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
12466 /* The exception for DW_TAG_typedef with has_children above is
12467 a workaround of GCC PR debug/47510. In the case of this complaint
12468 type_name_no_tag_or_error will error on such types later.
12470 GDB skipped children of DW_TAG_typedef by the shortcut above and then
12471 it could not find the child DIEs referenced later, this is checked
12472 above. In correct DWARF DW_TAG_typedef should have no children. */
12474 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
12475 complaint (&symfile_complaints
,
12476 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
12477 "- DIE at 0x%x [in module %s]"),
12478 part_die
->offset
.sect_off
, objfile
->name
);
12480 /* If we're at the second level, and we're an enumerator, and
12481 our parent has no specification (meaning possibly lives in a
12482 namespace elsewhere), then we can add the partial symbol now
12483 instead of queueing it. */
12484 if (part_die
->tag
== DW_TAG_enumerator
12485 && parent_die
!= NULL
12486 && parent_die
->die_parent
== NULL
12487 && parent_die
->tag
== DW_TAG_enumeration_type
12488 && parent_die
->has_specification
== 0)
12490 if (part_die
->name
== NULL
)
12491 complaint (&symfile_complaints
,
12492 _("malformed enumerator DIE ignored"));
12493 else if (building_psymtab
)
12494 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
12495 VAR_DOMAIN
, LOC_CONST
,
12496 (cu
->language
== language_cplus
12497 || cu
->language
== language_java
)
12498 ? &objfile
->global_psymbols
12499 : &objfile
->static_psymbols
,
12500 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
12502 info_ptr
= locate_pdi_sibling (reader
, part_die
, info_ptr
);
12506 /* We'll save this DIE so link it in. */
12507 part_die
->die_parent
= parent_die
;
12508 part_die
->die_sibling
= NULL
;
12509 part_die
->die_child
= NULL
;
12511 if (last_die
&& last_die
== parent_die
)
12512 last_die
->die_child
= part_die
;
12514 last_die
->die_sibling
= part_die
;
12516 last_die
= part_die
;
12518 if (first_die
== NULL
)
12519 first_die
= part_die
;
12521 /* Maybe add the DIE to the hash table. Not all DIEs that we
12522 find interesting need to be in the hash table, because we
12523 also have the parent/sibling/child chains; only those that we
12524 might refer to by offset later during partial symbol reading.
12526 For now this means things that might have be the target of a
12527 DW_AT_specification, DW_AT_abstract_origin, or
12528 DW_AT_extension. DW_AT_extension will refer only to
12529 namespaces; DW_AT_abstract_origin refers to functions (and
12530 many things under the function DIE, but we do not recurse
12531 into function DIEs during partial symbol reading) and
12532 possibly variables as well; DW_AT_specification refers to
12533 declarations. Declarations ought to have the DW_AT_declaration
12534 flag. It happens that GCC forgets to put it in sometimes, but
12535 only for functions, not for types.
12537 Adding more things than necessary to the hash table is harmless
12538 except for the performance cost. Adding too few will result in
12539 wasted time in find_partial_die, when we reread the compilation
12540 unit with load_all_dies set. */
12543 || abbrev
->tag
== DW_TAG_constant
12544 || abbrev
->tag
== DW_TAG_subprogram
12545 || abbrev
->tag
== DW_TAG_variable
12546 || abbrev
->tag
== DW_TAG_namespace
12547 || part_die
->is_declaration
)
12551 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
12552 part_die
->offset
.sect_off
, INSERT
);
12556 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
12557 sizeof (struct partial_die_info
));
12559 /* For some DIEs we want to follow their children (if any). For C
12560 we have no reason to follow the children of structures; for other
12561 languages we have to, so that we can get at method physnames
12562 to infer fully qualified class names, for DW_AT_specification,
12563 and for C++ template arguments. For C++, we also look one level
12564 inside functions to find template arguments (if the name of the
12565 function does not already contain the template arguments).
12567 For Ada, we need to scan the children of subprograms and lexical
12568 blocks as well because Ada allows the definition of nested
12569 entities that could be interesting for the debugger, such as
12570 nested subprograms for instance. */
12571 if (last_die
->has_children
12573 || last_die
->tag
== DW_TAG_namespace
12574 || last_die
->tag
== DW_TAG_module
12575 || last_die
->tag
== DW_TAG_enumeration_type
12576 || (cu
->language
== language_cplus
12577 && last_die
->tag
== DW_TAG_subprogram
12578 && (last_die
->name
== NULL
12579 || strchr (last_die
->name
, '<') == NULL
))
12580 || (cu
->language
!= language_c
12581 && (last_die
->tag
== DW_TAG_class_type
12582 || last_die
->tag
== DW_TAG_interface_type
12583 || last_die
->tag
== DW_TAG_structure_type
12584 || last_die
->tag
== DW_TAG_union_type
))
12585 || (cu
->language
== language_ada
12586 && (last_die
->tag
== DW_TAG_subprogram
12587 || last_die
->tag
== DW_TAG_lexical_block
))))
12590 parent_die
= last_die
;
12594 /* Otherwise we skip to the next sibling, if any. */
12595 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
12597 /* Back to the top, do it again. */
12601 /* Read a minimal amount of information into the minimal die structure. */
12604 read_partial_die (const struct die_reader_specs
*reader
,
12605 struct partial_die_info
*part_die
,
12606 struct abbrev_info
*abbrev
, unsigned int abbrev_len
,
12607 gdb_byte
*info_ptr
)
12609 struct dwarf2_cu
*cu
= reader
->cu
;
12610 struct objfile
*objfile
= cu
->objfile
;
12611 gdb_byte
*buffer
= reader
->buffer
;
12613 struct attribute attr
;
12614 int has_low_pc_attr
= 0;
12615 int has_high_pc_attr
= 0;
12616 int high_pc_relative
= 0;
12618 memset (part_die
, 0, sizeof (struct partial_die_info
));
12620 part_die
->offset
.sect_off
= info_ptr
- buffer
;
12622 info_ptr
+= abbrev_len
;
12624 if (abbrev
== NULL
)
12627 part_die
->tag
= abbrev
->tag
;
12628 part_die
->has_children
= abbrev
->has_children
;
12630 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
12632 info_ptr
= read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
12634 /* Store the data if it is of an attribute we want to keep in a
12635 partial symbol table. */
12639 switch (part_die
->tag
)
12641 case DW_TAG_compile_unit
:
12642 case DW_TAG_partial_unit
:
12643 case DW_TAG_type_unit
:
12644 /* Compilation units have a DW_AT_name that is a filename, not
12645 a source language identifier. */
12646 case DW_TAG_enumeration_type
:
12647 case DW_TAG_enumerator
:
12648 /* These tags always have simple identifiers already; no need
12649 to canonicalize them. */
12650 part_die
->name
= DW_STRING (&attr
);
12654 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
12655 &objfile
->objfile_obstack
);
12659 case DW_AT_linkage_name
:
12660 case DW_AT_MIPS_linkage_name
:
12661 /* Note that both forms of linkage name might appear. We
12662 assume they will be the same, and we only store the last
12664 if (cu
->language
== language_ada
)
12665 part_die
->name
= DW_STRING (&attr
);
12666 part_die
->linkage_name
= DW_STRING (&attr
);
12669 has_low_pc_attr
= 1;
12670 part_die
->lowpc
= DW_ADDR (&attr
);
12672 case DW_AT_high_pc
:
12673 has_high_pc_attr
= 1;
12674 if (attr
.form
== DW_FORM_addr
12675 || attr
.form
== DW_FORM_GNU_addr_index
)
12676 part_die
->highpc
= DW_ADDR (&attr
);
12679 high_pc_relative
= 1;
12680 part_die
->highpc
= DW_UNSND (&attr
);
12683 case DW_AT_location
:
12684 /* Support the .debug_loc offsets. */
12685 if (attr_form_is_block (&attr
))
12687 part_die
->d
.locdesc
= DW_BLOCK (&attr
);
12689 else if (attr_form_is_section_offset (&attr
))
12691 dwarf2_complex_location_expr_complaint ();
12695 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
12696 "partial symbol information");
12699 case DW_AT_external
:
12700 part_die
->is_external
= DW_UNSND (&attr
);
12702 case DW_AT_declaration
:
12703 part_die
->is_declaration
= DW_UNSND (&attr
);
12706 part_die
->has_type
= 1;
12708 case DW_AT_abstract_origin
:
12709 case DW_AT_specification
:
12710 case DW_AT_extension
:
12711 part_die
->has_specification
= 1;
12712 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
12713 part_die
->spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
12714 || cu
->per_cu
->is_dwz
);
12716 case DW_AT_sibling
:
12717 /* Ignore absolute siblings, they might point outside of
12718 the current compile unit. */
12719 if (attr
.form
== DW_FORM_ref_addr
)
12720 complaint (&symfile_complaints
,
12721 _("ignoring absolute DW_AT_sibling"));
12723 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
).sect_off
;
12725 case DW_AT_byte_size
:
12726 part_die
->has_byte_size
= 1;
12728 case DW_AT_calling_convention
:
12729 /* DWARF doesn't provide a way to identify a program's source-level
12730 entry point. DW_AT_calling_convention attributes are only meant
12731 to describe functions' calling conventions.
12733 However, because it's a necessary piece of information in
12734 Fortran, and because DW_CC_program is the only piece of debugging
12735 information whose definition refers to a 'main program' at all,
12736 several compilers have begun marking Fortran main programs with
12737 DW_CC_program --- even when those functions use the standard
12738 calling conventions.
12740 So until DWARF specifies a way to provide this information and
12741 compilers pick up the new representation, we'll support this
12743 if (DW_UNSND (&attr
) == DW_CC_program
12744 && cu
->language
== language_fortran
)
12746 set_main_name (part_die
->name
);
12748 /* As this DIE has a static linkage the name would be difficult
12749 to look up later. */
12750 language_of_main
= language_fortran
;
12754 if (DW_UNSND (&attr
) == DW_INL_inlined
12755 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
12756 part_die
->may_be_inlined
= 1;
12760 if (part_die
->tag
== DW_TAG_imported_unit
)
12762 part_die
->d
.offset
= dwarf2_get_ref_die_offset (&attr
);
12763 part_die
->is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
12764 || cu
->per_cu
->is_dwz
);
12773 if (high_pc_relative
)
12774 part_die
->highpc
+= part_die
->lowpc
;
12776 if (has_low_pc_attr
&& has_high_pc_attr
)
12778 /* When using the GNU linker, .gnu.linkonce. sections are used to
12779 eliminate duplicate copies of functions and vtables and such.
12780 The linker will arbitrarily choose one and discard the others.
12781 The AT_*_pc values for such functions refer to local labels in
12782 these sections. If the section from that file was discarded, the
12783 labels are not in the output, so the relocs get a value of 0.
12784 If this is a discarded function, mark the pc bounds as invalid,
12785 so that GDB will ignore it. */
12786 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
12788 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12790 complaint (&symfile_complaints
,
12791 _("DW_AT_low_pc %s is zero "
12792 "for DIE at 0x%x [in module %s]"),
12793 paddress (gdbarch
, part_die
->lowpc
),
12794 part_die
->offset
.sect_off
, objfile
->name
);
12796 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
12797 else if (part_die
->lowpc
>= part_die
->highpc
)
12799 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
12801 complaint (&symfile_complaints
,
12802 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
12803 "for DIE at 0x%x [in module %s]"),
12804 paddress (gdbarch
, part_die
->lowpc
),
12805 paddress (gdbarch
, part_die
->highpc
),
12806 part_die
->offset
.sect_off
, objfile
->name
);
12809 part_die
->has_pc_info
= 1;
12815 /* Find a cached partial DIE at OFFSET in CU. */
12817 static struct partial_die_info
*
12818 find_partial_die_in_comp_unit (sect_offset offset
, struct dwarf2_cu
*cu
)
12820 struct partial_die_info
*lookup_die
= NULL
;
12821 struct partial_die_info part_die
;
12823 part_die
.offset
= offset
;
12824 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
,
12830 /* Find a partial DIE at OFFSET, which may or may not be in CU,
12831 except in the case of .debug_types DIEs which do not reference
12832 outside their CU (they do however referencing other types via
12833 DW_FORM_ref_sig8). */
12835 static struct partial_die_info
*
12836 find_partial_die (sect_offset offset
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
12838 struct objfile
*objfile
= cu
->objfile
;
12839 struct dwarf2_per_cu_data
*per_cu
= NULL
;
12840 struct partial_die_info
*pd
= NULL
;
12842 if (offset_in_dwz
== cu
->per_cu
->is_dwz
12843 && offset_in_cu_p (&cu
->header
, offset
))
12845 pd
= find_partial_die_in_comp_unit (offset
, cu
);
12848 /* We missed recording what we needed.
12849 Load all dies and try again. */
12850 per_cu
= cu
->per_cu
;
12854 /* TUs don't reference other CUs/TUs (except via type signatures). */
12855 if (cu
->per_cu
->is_debug_types
)
12857 error (_("Dwarf Error: Type Unit at offset 0x%lx contains"
12858 " external reference to offset 0x%lx [in module %s].\n"),
12859 (long) cu
->header
.offset
.sect_off
, (long) offset
.sect_off
,
12860 bfd_get_filename (objfile
->obfd
));
12862 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
12865 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
12866 load_partial_comp_unit (per_cu
);
12868 per_cu
->cu
->last_used
= 0;
12869 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
12872 /* If we didn't find it, and not all dies have been loaded,
12873 load them all and try again. */
12875 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
12877 per_cu
->load_all_dies
= 1;
12879 /* This is nasty. When we reread the DIEs, somewhere up the call chain
12880 THIS_CU->cu may already be in use. So we can't just free it and
12881 replace its DIEs with the ones we read in. Instead, we leave those
12882 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
12883 and clobber THIS_CU->cu->partial_dies with the hash table for the new
12885 load_partial_comp_unit (per_cu
);
12887 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
12891 internal_error (__FILE__
, __LINE__
,
12892 _("could not find partial DIE 0x%x "
12893 "in cache [from module %s]\n"),
12894 offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
12898 /* See if we can figure out if the class lives in a namespace. We do
12899 this by looking for a member function; its demangled name will
12900 contain namespace info, if there is any. */
12903 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
12904 struct dwarf2_cu
*cu
)
12906 /* NOTE: carlton/2003-10-07: Getting the info this way changes
12907 what template types look like, because the demangler
12908 frequently doesn't give the same name as the debug info. We
12909 could fix this by only using the demangled name to get the
12910 prefix (but see comment in read_structure_type). */
12912 struct partial_die_info
*real_pdi
;
12913 struct partial_die_info
*child_pdi
;
12915 /* If this DIE (this DIE's specification, if any) has a parent, then
12916 we should not do this. We'll prepend the parent's fully qualified
12917 name when we create the partial symbol. */
12919 real_pdi
= struct_pdi
;
12920 while (real_pdi
->has_specification
)
12921 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
12922 real_pdi
->spec_is_dwz
, cu
);
12924 if (real_pdi
->die_parent
!= NULL
)
12927 for (child_pdi
= struct_pdi
->die_child
;
12929 child_pdi
= child_pdi
->die_sibling
)
12931 if (child_pdi
->tag
== DW_TAG_subprogram
12932 && child_pdi
->linkage_name
!= NULL
)
12934 char *actual_class_name
12935 = language_class_name_from_physname (cu
->language_defn
,
12936 child_pdi
->linkage_name
);
12937 if (actual_class_name
!= NULL
)
12940 = obsavestring (actual_class_name
,
12941 strlen (actual_class_name
),
12942 &cu
->objfile
->objfile_obstack
);
12943 xfree (actual_class_name
);
12950 /* Adjust PART_DIE before generating a symbol for it. This function
12951 may set the is_external flag or change the DIE's name. */
12954 fixup_partial_die (struct partial_die_info
*part_die
,
12955 struct dwarf2_cu
*cu
)
12957 /* Once we've fixed up a die, there's no point in doing so again.
12958 This also avoids a memory leak if we were to call
12959 guess_partial_die_structure_name multiple times. */
12960 if (part_die
->fixup_called
)
12963 /* If we found a reference attribute and the DIE has no name, try
12964 to find a name in the referred to DIE. */
12966 if (part_die
->name
== NULL
&& part_die
->has_specification
)
12968 struct partial_die_info
*spec_die
;
12970 spec_die
= find_partial_die (part_die
->spec_offset
,
12971 part_die
->spec_is_dwz
, cu
);
12973 fixup_partial_die (spec_die
, cu
);
12975 if (spec_die
->name
)
12977 part_die
->name
= spec_die
->name
;
12979 /* Copy DW_AT_external attribute if it is set. */
12980 if (spec_die
->is_external
)
12981 part_die
->is_external
= spec_die
->is_external
;
12985 /* Set default names for some unnamed DIEs. */
12987 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
12988 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
12990 /* If there is no parent die to provide a namespace, and there are
12991 children, see if we can determine the namespace from their linkage
12993 if (cu
->language
== language_cplus
12994 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
12995 && part_die
->die_parent
== NULL
12996 && part_die
->has_children
12997 && (part_die
->tag
== DW_TAG_class_type
12998 || part_die
->tag
== DW_TAG_structure_type
12999 || part_die
->tag
== DW_TAG_union_type
))
13000 guess_partial_die_structure_name (part_die
, cu
);
13002 /* GCC might emit a nameless struct or union that has a linkage
13003 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
13004 if (part_die
->name
== NULL
13005 && (part_die
->tag
== DW_TAG_class_type
13006 || part_die
->tag
== DW_TAG_interface_type
13007 || part_die
->tag
== DW_TAG_structure_type
13008 || part_die
->tag
== DW_TAG_union_type
)
13009 && part_die
->linkage_name
!= NULL
)
13013 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
13018 /* Strip any leading namespaces/classes, keep only the base name.
13019 DW_AT_name for named DIEs does not contain the prefixes. */
13020 base
= strrchr (demangled
, ':');
13021 if (base
&& base
> demangled
&& base
[-1] == ':')
13026 part_die
->name
= obsavestring (base
, strlen (base
),
13027 &cu
->objfile
->objfile_obstack
);
13032 part_die
->fixup_called
= 1;
13035 /* Read an attribute value described by an attribute form. */
13038 read_attribute_value (const struct die_reader_specs
*reader
,
13039 struct attribute
*attr
, unsigned form
,
13040 gdb_byte
*info_ptr
)
13042 struct dwarf2_cu
*cu
= reader
->cu
;
13043 bfd
*abfd
= reader
->abfd
;
13044 struct comp_unit_head
*cu_header
= &cu
->header
;
13045 unsigned int bytes_read
;
13046 struct dwarf_block
*blk
;
13051 case DW_FORM_ref_addr
:
13052 if (cu
->header
.version
== 2)
13053 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13055 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
13056 &cu
->header
, &bytes_read
);
13057 info_ptr
+= bytes_read
;
13059 case DW_FORM_GNU_ref_alt
:
13060 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13061 info_ptr
+= bytes_read
;
13064 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
13065 info_ptr
+= bytes_read
;
13067 case DW_FORM_block2
:
13068 blk
= dwarf_alloc_block (cu
);
13069 blk
->size
= read_2_bytes (abfd
, info_ptr
);
13071 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13072 info_ptr
+= blk
->size
;
13073 DW_BLOCK (attr
) = blk
;
13075 case DW_FORM_block4
:
13076 blk
= dwarf_alloc_block (cu
);
13077 blk
->size
= read_4_bytes (abfd
, info_ptr
);
13079 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13080 info_ptr
+= blk
->size
;
13081 DW_BLOCK (attr
) = blk
;
13083 case DW_FORM_data2
:
13084 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
13087 case DW_FORM_data4
:
13088 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
13091 case DW_FORM_data8
:
13092 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
13095 case DW_FORM_sec_offset
:
13096 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
13097 info_ptr
+= bytes_read
;
13099 case DW_FORM_string
:
13100 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
13101 DW_STRING_IS_CANONICAL (attr
) = 0;
13102 info_ptr
+= bytes_read
;
13105 if (!cu
->per_cu
->is_dwz
)
13107 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
13109 DW_STRING_IS_CANONICAL (attr
) = 0;
13110 info_ptr
+= bytes_read
;
13114 case DW_FORM_GNU_strp_alt
:
13116 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
13117 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
13120 DW_STRING (attr
) = read_indirect_string_from_dwz (dwz
, str_offset
);
13121 DW_STRING_IS_CANONICAL (attr
) = 0;
13122 info_ptr
+= bytes_read
;
13125 case DW_FORM_exprloc
:
13126 case DW_FORM_block
:
13127 blk
= dwarf_alloc_block (cu
);
13128 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13129 info_ptr
+= bytes_read
;
13130 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13131 info_ptr
+= blk
->size
;
13132 DW_BLOCK (attr
) = blk
;
13134 case DW_FORM_block1
:
13135 blk
= dwarf_alloc_block (cu
);
13136 blk
->size
= read_1_byte (abfd
, info_ptr
);
13138 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
13139 info_ptr
+= blk
->size
;
13140 DW_BLOCK (attr
) = blk
;
13142 case DW_FORM_data1
:
13143 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
13147 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
13150 case DW_FORM_flag_present
:
13151 DW_UNSND (attr
) = 1;
13153 case DW_FORM_sdata
:
13154 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
13155 info_ptr
+= bytes_read
;
13157 case DW_FORM_udata
:
13158 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13159 info_ptr
+= bytes_read
;
13162 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
13163 + read_1_byte (abfd
, info_ptr
));
13167 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
13168 + read_2_bytes (abfd
, info_ptr
));
13172 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
13173 + read_4_bytes (abfd
, info_ptr
));
13177 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
13178 + read_8_bytes (abfd
, info_ptr
));
13181 case DW_FORM_ref_sig8
:
13182 /* Convert the signature to something we can record in DW_UNSND
13184 NOTE: This is NULL if the type wasn't found. */
13185 DW_SIGNATURED_TYPE (attr
) =
13186 lookup_signatured_type (read_8_bytes (abfd
, info_ptr
));
13189 case DW_FORM_ref_udata
:
13190 DW_UNSND (attr
) = (cu
->header
.offset
.sect_off
13191 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
13192 info_ptr
+= bytes_read
;
13194 case DW_FORM_indirect
:
13195 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13196 info_ptr
+= bytes_read
;
13197 info_ptr
= read_attribute_value (reader
, attr
, form
, info_ptr
);
13199 case DW_FORM_GNU_addr_index
:
13200 if (reader
->dwo_file
== NULL
)
13202 /* For now flag a hard error.
13203 Later we can turn this into a complaint. */
13204 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
13205 dwarf_form_name (form
),
13206 bfd_get_filename (abfd
));
13208 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
13209 info_ptr
+= bytes_read
;
13211 case DW_FORM_GNU_str_index
:
13212 if (reader
->dwo_file
== NULL
)
13214 /* For now flag a hard error.
13215 Later we can turn this into a complaint if warranted. */
13216 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
13217 dwarf_form_name (form
),
13218 bfd_get_filename (abfd
));
13221 ULONGEST str_index
=
13222 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
13224 DW_STRING (attr
) = read_str_index (reader
, cu
, str_index
);
13225 DW_STRING_IS_CANONICAL (attr
) = 0;
13226 info_ptr
+= bytes_read
;
13230 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
13231 dwarf_form_name (form
),
13232 bfd_get_filename (abfd
));
13236 if (cu
->per_cu
->is_dwz
&& is_ref_attr (attr
))
13237 attr
->form
= DW_FORM_GNU_ref_alt
;
13239 /* We have seen instances where the compiler tried to emit a byte
13240 size attribute of -1 which ended up being encoded as an unsigned
13241 0xffffffff. Although 0xffffffff is technically a valid size value,
13242 an object of this size seems pretty unlikely so we can relatively
13243 safely treat these cases as if the size attribute was invalid and
13244 treat them as zero by default. */
13245 if (attr
->name
== DW_AT_byte_size
13246 && form
== DW_FORM_data4
13247 && DW_UNSND (attr
) >= 0xffffffff)
13250 (&symfile_complaints
,
13251 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
13252 hex_string (DW_UNSND (attr
)));
13253 DW_UNSND (attr
) = 0;
13259 /* Read an attribute described by an abbreviated attribute. */
13262 read_attribute (const struct die_reader_specs
*reader
,
13263 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
13264 gdb_byte
*info_ptr
)
13266 attr
->name
= abbrev
->name
;
13267 return read_attribute_value (reader
, attr
, abbrev
->form
, info_ptr
);
13270 /* Read dwarf information from a buffer. */
13272 static unsigned int
13273 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
13275 return bfd_get_8 (abfd
, buf
);
13279 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
13281 return bfd_get_signed_8 (abfd
, buf
);
13284 static unsigned int
13285 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
13287 return bfd_get_16 (abfd
, buf
);
13291 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
13293 return bfd_get_signed_16 (abfd
, buf
);
13296 static unsigned int
13297 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
13299 return bfd_get_32 (abfd
, buf
);
13303 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
13305 return bfd_get_signed_32 (abfd
, buf
);
13309 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
13311 return bfd_get_64 (abfd
, buf
);
13315 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
13316 unsigned int *bytes_read
)
13318 struct comp_unit_head
*cu_header
= &cu
->header
;
13319 CORE_ADDR retval
= 0;
13321 if (cu_header
->signed_addr_p
)
13323 switch (cu_header
->addr_size
)
13326 retval
= bfd_get_signed_16 (abfd
, buf
);
13329 retval
= bfd_get_signed_32 (abfd
, buf
);
13332 retval
= bfd_get_signed_64 (abfd
, buf
);
13335 internal_error (__FILE__
, __LINE__
,
13336 _("read_address: bad switch, signed [in module %s]"),
13337 bfd_get_filename (abfd
));
13342 switch (cu_header
->addr_size
)
13345 retval
= bfd_get_16 (abfd
, buf
);
13348 retval
= bfd_get_32 (abfd
, buf
);
13351 retval
= bfd_get_64 (abfd
, buf
);
13354 internal_error (__FILE__
, __LINE__
,
13355 _("read_address: bad switch, "
13356 "unsigned [in module %s]"),
13357 bfd_get_filename (abfd
));
13361 *bytes_read
= cu_header
->addr_size
;
13365 /* Read the initial length from a section. The (draft) DWARF 3
13366 specification allows the initial length to take up either 4 bytes
13367 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
13368 bytes describe the length and all offsets will be 8 bytes in length
13371 An older, non-standard 64-bit format is also handled by this
13372 function. The older format in question stores the initial length
13373 as an 8-byte quantity without an escape value. Lengths greater
13374 than 2^32 aren't very common which means that the initial 4 bytes
13375 is almost always zero. Since a length value of zero doesn't make
13376 sense for the 32-bit format, this initial zero can be considered to
13377 be an escape value which indicates the presence of the older 64-bit
13378 format. As written, the code can't detect (old format) lengths
13379 greater than 4GB. If it becomes necessary to handle lengths
13380 somewhat larger than 4GB, we could allow other small values (such
13381 as the non-sensical values of 1, 2, and 3) to also be used as
13382 escape values indicating the presence of the old format.
13384 The value returned via bytes_read should be used to increment the
13385 relevant pointer after calling read_initial_length().
13387 [ Note: read_initial_length() and read_offset() are based on the
13388 document entitled "DWARF Debugging Information Format", revision
13389 3, draft 8, dated November 19, 2001. This document was obtained
13392 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
13394 This document is only a draft and is subject to change. (So beware.)
13396 Details regarding the older, non-standard 64-bit format were
13397 determined empirically by examining 64-bit ELF files produced by
13398 the SGI toolchain on an IRIX 6.5 machine.
13400 - Kevin, July 16, 2002
13404 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
13406 LONGEST length
= bfd_get_32 (abfd
, buf
);
13408 if (length
== 0xffffffff)
13410 length
= bfd_get_64 (abfd
, buf
+ 4);
13413 else if (length
== 0)
13415 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
13416 length
= bfd_get_64 (abfd
, buf
);
13427 /* Cover function for read_initial_length.
13428 Returns the length of the object at BUF, and stores the size of the
13429 initial length in *BYTES_READ and stores the size that offsets will be in
13431 If the initial length size is not equivalent to that specified in
13432 CU_HEADER then issue a complaint.
13433 This is useful when reading non-comp-unit headers. */
13436 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
13437 const struct comp_unit_head
*cu_header
,
13438 unsigned int *bytes_read
,
13439 unsigned int *offset_size
)
13441 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
13443 gdb_assert (cu_header
->initial_length_size
== 4
13444 || cu_header
->initial_length_size
== 8
13445 || cu_header
->initial_length_size
== 12);
13447 if (cu_header
->initial_length_size
!= *bytes_read
)
13448 complaint (&symfile_complaints
,
13449 _("intermixed 32-bit and 64-bit DWARF sections"));
13451 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
13455 /* Read an offset from the data stream. The size of the offset is
13456 given by cu_header->offset_size. */
13459 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
13460 unsigned int *bytes_read
)
13462 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
13464 *bytes_read
= cu_header
->offset_size
;
13468 /* Read an offset from the data stream. */
13471 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
13473 LONGEST retval
= 0;
13475 switch (offset_size
)
13478 retval
= bfd_get_32 (abfd
, buf
);
13481 retval
= bfd_get_64 (abfd
, buf
);
13484 internal_error (__FILE__
, __LINE__
,
13485 _("read_offset_1: bad switch [in module %s]"),
13486 bfd_get_filename (abfd
));
13493 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
13495 /* If the size of a host char is 8 bits, we can return a pointer
13496 to the buffer, otherwise we have to copy the data to a buffer
13497 allocated on the temporary obstack. */
13498 gdb_assert (HOST_CHAR_BIT
== 8);
13503 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
13505 /* If the size of a host char is 8 bits, we can return a pointer
13506 to the string, otherwise we have to copy the string to a buffer
13507 allocated on the temporary obstack. */
13508 gdb_assert (HOST_CHAR_BIT
== 8);
13511 *bytes_read_ptr
= 1;
13514 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
13515 return (char *) buf
;
13519 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
13521 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
13522 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
13523 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
13524 bfd_get_filename (abfd
));
13525 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
13526 error (_("DW_FORM_strp pointing outside of "
13527 ".debug_str section [in module %s]"),
13528 bfd_get_filename (abfd
));
13529 gdb_assert (HOST_CHAR_BIT
== 8);
13530 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
13532 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
13535 /* Read a string at offset STR_OFFSET in the .debug_str section from
13536 the .dwz file DWZ. Throw an error if the offset is too large. If
13537 the string consists of a single NUL byte, return NULL; otherwise
13538 return a pointer to the string. */
13541 read_indirect_string_from_dwz (struct dwz_file
*dwz
, LONGEST str_offset
)
13543 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwz
->str
);
13545 if (dwz
->str
.buffer
== NULL
)
13546 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
13547 "section [in module %s]"),
13548 bfd_get_filename (dwz
->dwz_bfd
));
13549 if (str_offset
>= dwz
->str
.size
)
13550 error (_("DW_FORM_GNU_strp_alt pointing outside of "
13551 ".debug_str section [in module %s]"),
13552 bfd_get_filename (dwz
->dwz_bfd
));
13553 gdb_assert (HOST_CHAR_BIT
== 8);
13554 if (dwz
->str
.buffer
[str_offset
] == '\0')
13556 return (char *) (dwz
->str
.buffer
+ str_offset
);
13560 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
13561 const struct comp_unit_head
*cu_header
,
13562 unsigned int *bytes_read_ptr
)
13564 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
13566 return read_indirect_string_at_offset (abfd
, str_offset
);
13570 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
13573 unsigned int num_read
;
13575 unsigned char byte
;
13583 byte
= bfd_get_8 (abfd
, buf
);
13586 result
|= ((ULONGEST
) (byte
& 127) << shift
);
13587 if ((byte
& 128) == 0)
13593 *bytes_read_ptr
= num_read
;
13598 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
13601 int i
, shift
, num_read
;
13602 unsigned char byte
;
13610 byte
= bfd_get_8 (abfd
, buf
);
13613 result
|= ((LONGEST
) (byte
& 127) << shift
);
13615 if ((byte
& 128) == 0)
13620 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
13621 result
|= -(((LONGEST
) 1) << shift
);
13622 *bytes_read_ptr
= num_read
;
13626 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
13627 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
13628 ADDR_SIZE is the size of addresses from the CU header. */
13631 read_addr_index_1 (unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
13633 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13634 bfd
*abfd
= objfile
->obfd
;
13635 const gdb_byte
*info_ptr
;
13637 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
13638 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
13639 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
13641 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
13642 error (_("DW_FORM_addr_index pointing outside of "
13643 ".debug_addr section [in module %s]"),
13645 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
13646 + addr_base
+ addr_index
* addr_size
);
13647 if (addr_size
== 4)
13648 return bfd_get_32 (abfd
, info_ptr
);
13650 return bfd_get_64 (abfd
, info_ptr
);
13653 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
13656 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
13658 return read_addr_index_1 (addr_index
, cu
->addr_base
, cu
->header
.addr_size
);
13661 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
13664 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, gdb_byte
*info_ptr
,
13665 unsigned int *bytes_read
)
13667 bfd
*abfd
= cu
->objfile
->obfd
;
13668 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
13670 return read_addr_index (cu
, addr_index
);
13673 /* Data structure to pass results from dwarf2_read_addr_index_reader
13674 back to dwarf2_read_addr_index. */
13676 struct dwarf2_read_addr_index_data
13678 ULONGEST addr_base
;
13682 /* die_reader_func for dwarf2_read_addr_index. */
13685 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
13686 gdb_byte
*info_ptr
,
13687 struct die_info
*comp_unit_die
,
13691 struct dwarf2_cu
*cu
= reader
->cu
;
13692 struct dwarf2_read_addr_index_data
*aidata
=
13693 (struct dwarf2_read_addr_index_data
*) data
;
13695 aidata
->addr_base
= cu
->addr_base
;
13696 aidata
->addr_size
= cu
->header
.addr_size
;
13699 /* Given an index in .debug_addr, fetch the value.
13700 NOTE: This can be called during dwarf expression evaluation,
13701 long after the debug information has been read, and thus per_cu->cu
13702 may no longer exist. */
13705 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
13706 unsigned int addr_index
)
13708 struct objfile
*objfile
= per_cu
->objfile
;
13709 struct dwarf2_cu
*cu
= per_cu
->cu
;
13710 ULONGEST addr_base
;
13713 /* This is intended to be called from outside this file. */
13714 dw2_setup (objfile
);
13716 /* We need addr_base and addr_size.
13717 If we don't have PER_CU->cu, we have to get it.
13718 Nasty, but the alternative is storing the needed info in PER_CU,
13719 which at this point doesn't seem justified: it's not clear how frequently
13720 it would get used and it would increase the size of every PER_CU.
13721 Entry points like dwarf2_per_cu_addr_size do a similar thing
13722 so we're not in uncharted territory here.
13723 Alas we need to be a bit more complicated as addr_base is contained
13726 We don't need to read the entire CU(/TU).
13727 We just need the header and top level die.
13729 IWBN to use the aging mechanism to let us lazily later discard the CU.
13730 For now we skip this optimization. */
13734 addr_base
= cu
->addr_base
;
13735 addr_size
= cu
->header
.addr_size
;
13739 struct dwarf2_read_addr_index_data aidata
;
13741 /* Note: We can't use init_cutu_and_read_dies_simple here,
13742 we need addr_base. */
13743 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
13744 dwarf2_read_addr_index_reader
, &aidata
);
13745 addr_base
= aidata
.addr_base
;
13746 addr_size
= aidata
.addr_size
;
13749 return read_addr_index_1 (addr_index
, addr_base
, addr_size
);
13752 /* Given a DW_AT_str_index, fetch the string. */
13755 read_str_index (const struct die_reader_specs
*reader
,
13756 struct dwarf2_cu
*cu
, ULONGEST str_index
)
13758 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13759 const char *dwo_name
= objfile
->name
;
13760 bfd
*abfd
= objfile
->obfd
;
13761 struct dwo_sections
*sections
= &reader
->dwo_file
->sections
;
13762 gdb_byte
*info_ptr
;
13763 ULONGEST str_offset
;
13765 dwarf2_read_section (objfile
, §ions
->str
);
13766 dwarf2_read_section (objfile
, §ions
->str_offsets
);
13767 if (sections
->str
.buffer
== NULL
)
13768 error (_("DW_FORM_str_index used without .debug_str.dwo section"
13769 " in CU at offset 0x%lx [in module %s]"),
13770 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13771 if (sections
->str_offsets
.buffer
== NULL
)
13772 error (_("DW_FORM_str_index used without .debug_str_offsets.dwo section"
13773 " in CU at offset 0x%lx [in module %s]"),
13774 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13775 if (str_index
* cu
->header
.offset_size
>= sections
->str_offsets
.size
)
13776 error (_("DW_FORM_str_index pointing outside of .debug_str_offsets.dwo"
13777 " section in CU at offset 0x%lx [in module %s]"),
13778 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13779 info_ptr
= (sections
->str_offsets
.buffer
13780 + str_index
* cu
->header
.offset_size
);
13781 if (cu
->header
.offset_size
== 4)
13782 str_offset
= bfd_get_32 (abfd
, info_ptr
);
13784 str_offset
= bfd_get_64 (abfd
, info_ptr
);
13785 if (str_offset
>= sections
->str
.size
)
13786 error (_("Offset from DW_FORM_str_index pointing outside of"
13787 " .debug_str.dwo section in CU at offset 0x%lx [in module %s]"),
13788 (long) cu
->header
.offset
.sect_off
, dwo_name
);
13789 return (char *) (sections
->str
.buffer
+ str_offset
);
13792 /* Return the length of an LEB128 number in BUF. */
13795 leb128_size (const gdb_byte
*buf
)
13797 const gdb_byte
*begin
= buf
;
13803 if ((byte
& 128) == 0)
13804 return buf
- begin
;
13809 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
13816 cu
->language
= language_c
;
13818 case DW_LANG_C_plus_plus
:
13819 cu
->language
= language_cplus
;
13822 cu
->language
= language_d
;
13824 case DW_LANG_Fortran77
:
13825 case DW_LANG_Fortran90
:
13826 case DW_LANG_Fortran95
:
13827 cu
->language
= language_fortran
;
13830 cu
->language
= language_go
;
13832 case DW_LANG_Mips_Assembler
:
13833 cu
->language
= language_asm
;
13836 cu
->language
= language_java
;
13838 case DW_LANG_Ada83
:
13839 case DW_LANG_Ada95
:
13840 cu
->language
= language_ada
;
13842 case DW_LANG_Modula2
:
13843 cu
->language
= language_m2
;
13845 case DW_LANG_Pascal83
:
13846 cu
->language
= language_pascal
;
13849 cu
->language
= language_objc
;
13851 case DW_LANG_Cobol74
:
13852 case DW_LANG_Cobol85
:
13854 cu
->language
= language_minimal
;
13857 cu
->language_defn
= language_def (cu
->language
);
13860 /* Return the named attribute or NULL if not there. */
13862 static struct attribute
*
13863 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
13868 struct attribute
*spec
= NULL
;
13870 for (i
= 0; i
< die
->num_attrs
; ++i
)
13872 if (die
->attrs
[i
].name
== name
)
13873 return &die
->attrs
[i
];
13874 if (die
->attrs
[i
].name
== DW_AT_specification
13875 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
13876 spec
= &die
->attrs
[i
];
13882 die
= follow_die_ref (die
, spec
, &cu
);
13888 /* Return the named attribute or NULL if not there,
13889 but do not follow DW_AT_specification, etc.
13890 This is for use in contexts where we're reading .debug_types dies.
13891 Following DW_AT_specification, DW_AT_abstract_origin will take us
13892 back up the chain, and we want to go down. */
13894 static struct attribute
*
13895 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
13899 for (i
= 0; i
< die
->num_attrs
; ++i
)
13900 if (die
->attrs
[i
].name
== name
)
13901 return &die
->attrs
[i
];
13906 /* Return non-zero iff the attribute NAME is defined for the given DIE,
13907 and holds a non-zero value. This function should only be used for
13908 DW_FORM_flag or DW_FORM_flag_present attributes. */
13911 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
13913 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
13915 return (attr
&& DW_UNSND (attr
));
13919 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
13921 /* A DIE is a declaration if it has a DW_AT_declaration attribute
13922 which value is non-zero. However, we have to be careful with
13923 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
13924 (via dwarf2_flag_true_p) follows this attribute. So we may
13925 end up accidently finding a declaration attribute that belongs
13926 to a different DIE referenced by the specification attribute,
13927 even though the given DIE does not have a declaration attribute. */
13928 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
13929 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
13932 /* Return the die giving the specification for DIE, if there is
13933 one. *SPEC_CU is the CU containing DIE on input, and the CU
13934 containing the return value on output. If there is no
13935 specification, but there is an abstract origin, that is
13938 static struct die_info
*
13939 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
13941 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
13944 if (spec_attr
== NULL
)
13945 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
13947 if (spec_attr
== NULL
)
13950 return follow_die_ref (die
, spec_attr
, spec_cu
);
13953 /* Free the line_header structure *LH, and any arrays and strings it
13955 NOTE: This is also used as a "cleanup" function. */
13958 free_line_header (struct line_header
*lh
)
13960 if (lh
->standard_opcode_lengths
)
13961 xfree (lh
->standard_opcode_lengths
);
13963 /* Remember that all the lh->file_names[i].name pointers are
13964 pointers into debug_line_buffer, and don't need to be freed. */
13965 if (lh
->file_names
)
13966 xfree (lh
->file_names
);
13968 /* Similarly for the include directory names. */
13969 if (lh
->include_dirs
)
13970 xfree (lh
->include_dirs
);
13975 /* Add an entry to LH's include directory table. */
13978 add_include_dir (struct line_header
*lh
, char *include_dir
)
13980 /* Grow the array if necessary. */
13981 if (lh
->include_dirs_size
== 0)
13983 lh
->include_dirs_size
= 1; /* for testing */
13984 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
13985 * sizeof (*lh
->include_dirs
));
13987 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
13989 lh
->include_dirs_size
*= 2;
13990 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
13991 (lh
->include_dirs_size
13992 * sizeof (*lh
->include_dirs
)));
13995 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
13998 /* Add an entry to LH's file name table. */
14001 add_file_name (struct line_header
*lh
,
14003 unsigned int dir_index
,
14004 unsigned int mod_time
,
14005 unsigned int length
)
14007 struct file_entry
*fe
;
14009 /* Grow the array if necessary. */
14010 if (lh
->file_names_size
== 0)
14012 lh
->file_names_size
= 1; /* for testing */
14013 lh
->file_names
= xmalloc (lh
->file_names_size
14014 * sizeof (*lh
->file_names
));
14016 else if (lh
->num_file_names
>= lh
->file_names_size
)
14018 lh
->file_names_size
*= 2;
14019 lh
->file_names
= xrealloc (lh
->file_names
,
14020 (lh
->file_names_size
14021 * sizeof (*lh
->file_names
)));
14024 fe
= &lh
->file_names
[lh
->num_file_names
++];
14026 fe
->dir_index
= dir_index
;
14027 fe
->mod_time
= mod_time
;
14028 fe
->length
= length
;
14029 fe
->included_p
= 0;
14033 /* A convenience function to find the proper .debug_line section for a
14036 static struct dwarf2_section_info
*
14037 get_debug_line_section (struct dwarf2_cu
*cu
)
14039 struct dwarf2_section_info
*section
;
14041 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
14043 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14044 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
14045 else if (cu
->per_cu
->is_dwz
)
14047 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
14049 section
= &dwz
->line
;
14052 section
= &dwarf2_per_objfile
->line
;
14057 /* Read the statement program header starting at OFFSET in
14058 .debug_line, or .debug_line.dwo. Return a pointer
14059 to a struct line_header, allocated using xmalloc.
14061 NOTE: the strings in the include directory and file name tables of
14062 the returned object point into the dwarf line section buffer,
14063 and must not be freed. */
14065 static struct line_header
*
14066 dwarf_decode_line_header (unsigned int offset
, struct dwarf2_cu
*cu
)
14068 struct cleanup
*back_to
;
14069 struct line_header
*lh
;
14070 gdb_byte
*line_ptr
;
14071 unsigned int bytes_read
, offset_size
;
14073 char *cur_dir
, *cur_file
;
14074 struct dwarf2_section_info
*section
;
14077 section
= get_debug_line_section (cu
);
14078 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
14079 if (section
->buffer
== NULL
)
14081 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
14082 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
14084 complaint (&symfile_complaints
, _("missing .debug_line section"));
14088 /* We can't do this until we know the section is non-empty.
14089 Only then do we know we have such a section. */
14090 abfd
= section
->asection
->owner
;
14092 /* Make sure that at least there's room for the total_length field.
14093 That could be 12 bytes long, but we're just going to fudge that. */
14094 if (offset
+ 4 >= section
->size
)
14096 dwarf2_statement_list_fits_in_line_number_section_complaint ();
14100 lh
= xmalloc (sizeof (*lh
));
14101 memset (lh
, 0, sizeof (*lh
));
14102 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
14105 line_ptr
= section
->buffer
+ offset
;
14107 /* Read in the header. */
14109 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
14110 &bytes_read
, &offset_size
);
14111 line_ptr
+= bytes_read
;
14112 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
14114 dwarf2_statement_list_fits_in_line_number_section_complaint ();
14117 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
14118 lh
->version
= read_2_bytes (abfd
, line_ptr
);
14120 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
14121 line_ptr
+= offset_size
;
14122 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
14124 if (lh
->version
>= 4)
14126 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
14130 lh
->maximum_ops_per_instruction
= 1;
14132 if (lh
->maximum_ops_per_instruction
== 0)
14134 lh
->maximum_ops_per_instruction
= 1;
14135 complaint (&symfile_complaints
,
14136 _("invalid maximum_ops_per_instruction "
14137 "in `.debug_line' section"));
14140 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
14142 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
14144 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
14146 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
14148 lh
->standard_opcode_lengths
14149 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
14151 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
14152 for (i
= 1; i
< lh
->opcode_base
; ++i
)
14154 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
14158 /* Read directory table. */
14159 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
14161 line_ptr
+= bytes_read
;
14162 add_include_dir (lh
, cur_dir
);
14164 line_ptr
+= bytes_read
;
14166 /* Read file name table. */
14167 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
14169 unsigned int dir_index
, mod_time
, length
;
14171 line_ptr
+= bytes_read
;
14172 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14173 line_ptr
+= bytes_read
;
14174 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14175 line_ptr
+= bytes_read
;
14176 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14177 line_ptr
+= bytes_read
;
14179 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
14181 line_ptr
+= bytes_read
;
14182 lh
->statement_program_start
= line_ptr
;
14184 if (line_ptr
> (section
->buffer
+ section
->size
))
14185 complaint (&symfile_complaints
,
14186 _("line number info header doesn't "
14187 "fit in `.debug_line' section"));
14189 discard_cleanups (back_to
);
14193 /* Subroutine of dwarf_decode_lines to simplify it.
14194 Return the file name of the psymtab for included file FILE_INDEX
14195 in line header LH of PST.
14196 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
14197 If space for the result is malloc'd, it will be freed by a cleanup.
14198 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
14201 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
14202 const struct partial_symtab
*pst
,
14203 const char *comp_dir
)
14205 const struct file_entry fe
= lh
->file_names
[file_index
];
14206 char *include_name
= fe
.name
;
14207 char *include_name_to_compare
= include_name
;
14208 char *dir_name
= NULL
;
14209 const char *pst_filename
;
14210 char *copied_name
= NULL
;
14214 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
14216 if (!IS_ABSOLUTE_PATH (include_name
)
14217 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
14219 /* Avoid creating a duplicate psymtab for PST.
14220 We do this by comparing INCLUDE_NAME and PST_FILENAME.
14221 Before we do the comparison, however, we need to account
14222 for DIR_NAME and COMP_DIR.
14223 First prepend dir_name (if non-NULL). If we still don't
14224 have an absolute path prepend comp_dir (if non-NULL).
14225 However, the directory we record in the include-file's
14226 psymtab does not contain COMP_DIR (to match the
14227 corresponding symtab(s)).
14232 bash$ gcc -g ./hello.c
14233 include_name = "hello.c"
14235 DW_AT_comp_dir = comp_dir = "/tmp"
14236 DW_AT_name = "./hello.c" */
14238 if (dir_name
!= NULL
)
14240 include_name
= concat (dir_name
, SLASH_STRING
,
14241 include_name
, (char *)NULL
);
14242 include_name_to_compare
= include_name
;
14243 make_cleanup (xfree
, include_name
);
14245 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
14247 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
14248 include_name
, (char *)NULL
);
14252 pst_filename
= pst
->filename
;
14253 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
14255 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
14256 pst_filename
, (char *)NULL
);
14257 pst_filename
= copied_name
;
14260 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
14262 if (include_name_to_compare
!= include_name
)
14263 xfree (include_name_to_compare
);
14264 if (copied_name
!= NULL
)
14265 xfree (copied_name
);
14269 return include_name
;
14272 /* Ignore this record_line request. */
14275 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
14280 /* Subroutine of dwarf_decode_lines to simplify it.
14281 Process the line number information in LH. */
14284 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
14285 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
14287 gdb_byte
*line_ptr
, *extended_end
;
14288 gdb_byte
*line_end
;
14289 unsigned int bytes_read
, extended_len
;
14290 unsigned char op_code
, extended_op
, adj_opcode
;
14291 CORE_ADDR baseaddr
;
14292 struct objfile
*objfile
= cu
->objfile
;
14293 bfd
*abfd
= objfile
->obfd
;
14294 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14295 const int decode_for_pst_p
= (pst
!= NULL
);
14296 struct subfile
*last_subfile
= NULL
;
14297 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
14300 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14302 line_ptr
= lh
->statement_program_start
;
14303 line_end
= lh
->statement_program_end
;
14305 /* Read the statement sequences until there's nothing left. */
14306 while (line_ptr
< line_end
)
14308 /* state machine registers */
14309 CORE_ADDR address
= 0;
14310 unsigned int file
= 1;
14311 unsigned int line
= 1;
14312 unsigned int column
= 0;
14313 int is_stmt
= lh
->default_is_stmt
;
14314 int basic_block
= 0;
14315 int end_sequence
= 0;
14317 unsigned char op_index
= 0;
14319 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
14321 /* Start a subfile for the current file of the state machine. */
14322 /* lh->include_dirs and lh->file_names are 0-based, but the
14323 directory and file name numbers in the statement program
14325 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
14329 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14331 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
14334 /* Decode the table. */
14335 while (!end_sequence
)
14337 op_code
= read_1_byte (abfd
, line_ptr
);
14339 if (line_ptr
> line_end
)
14341 dwarf2_debug_line_missing_end_sequence_complaint ();
14345 if (op_code
>= lh
->opcode_base
)
14347 /* Special operand. */
14348 adj_opcode
= op_code
- lh
->opcode_base
;
14349 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
14350 / lh
->maximum_ops_per_instruction
)
14351 * lh
->minimum_instruction_length
);
14352 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
14353 % lh
->maximum_ops_per_instruction
);
14354 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
14355 if (lh
->num_file_names
< file
|| file
== 0)
14356 dwarf2_debug_line_missing_file_complaint ();
14357 /* For now we ignore lines not starting on an
14358 instruction boundary. */
14359 else if (op_index
== 0)
14361 lh
->file_names
[file
- 1].included_p
= 1;
14362 if (!decode_for_pst_p
&& is_stmt
)
14364 if (last_subfile
!= current_subfile
)
14366 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14368 (*p_record_line
) (last_subfile
, 0, addr
);
14369 last_subfile
= current_subfile
;
14371 /* Append row to matrix using current values. */
14372 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14373 (*p_record_line
) (current_subfile
, line
, addr
);
14378 else switch (op_code
)
14380 case DW_LNS_extended_op
:
14381 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
14383 line_ptr
+= bytes_read
;
14384 extended_end
= line_ptr
+ extended_len
;
14385 extended_op
= read_1_byte (abfd
, line_ptr
);
14387 switch (extended_op
)
14389 case DW_LNE_end_sequence
:
14390 p_record_line
= record_line
;
14393 case DW_LNE_set_address
:
14394 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
14396 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14398 /* This line table is for a function which has been
14399 GCd by the linker. Ignore it. PR gdb/12528 */
14402 = line_ptr
- get_debug_line_section (cu
)->buffer
;
14404 complaint (&symfile_complaints
,
14405 _(".debug_line address at offset 0x%lx is 0 "
14407 line_offset
, objfile
->name
);
14408 p_record_line
= noop_record_line
;
14412 line_ptr
+= bytes_read
;
14413 address
+= baseaddr
;
14415 case DW_LNE_define_file
:
14418 unsigned int dir_index
, mod_time
, length
;
14420 cur_file
= read_direct_string (abfd
, line_ptr
,
14422 line_ptr
+= bytes_read
;
14424 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14425 line_ptr
+= bytes_read
;
14427 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14428 line_ptr
+= bytes_read
;
14430 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14431 line_ptr
+= bytes_read
;
14432 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
14435 case DW_LNE_set_discriminator
:
14436 /* The discriminator is not interesting to the debugger;
14438 line_ptr
= extended_end
;
14441 complaint (&symfile_complaints
,
14442 _("mangled .debug_line section"));
14445 /* Make sure that we parsed the extended op correctly. If e.g.
14446 we expected a different address size than the producer used,
14447 we may have read the wrong number of bytes. */
14448 if (line_ptr
!= extended_end
)
14450 complaint (&symfile_complaints
,
14451 _("mangled .debug_line section"));
14456 if (lh
->num_file_names
< file
|| file
== 0)
14457 dwarf2_debug_line_missing_file_complaint ();
14460 lh
->file_names
[file
- 1].included_p
= 1;
14461 if (!decode_for_pst_p
&& is_stmt
)
14463 if (last_subfile
!= current_subfile
)
14465 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14467 (*p_record_line
) (last_subfile
, 0, addr
);
14468 last_subfile
= current_subfile
;
14470 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14471 (*p_record_line
) (current_subfile
, line
, addr
);
14476 case DW_LNS_advance_pc
:
14479 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14481 address
+= (((op_index
+ adjust
)
14482 / lh
->maximum_ops_per_instruction
)
14483 * lh
->minimum_instruction_length
);
14484 op_index
= ((op_index
+ adjust
)
14485 % lh
->maximum_ops_per_instruction
);
14486 line_ptr
+= bytes_read
;
14489 case DW_LNS_advance_line
:
14490 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
14491 line_ptr
+= bytes_read
;
14493 case DW_LNS_set_file
:
14495 /* The arrays lh->include_dirs and lh->file_names are
14496 0-based, but the directory and file name numbers in
14497 the statement program are 1-based. */
14498 struct file_entry
*fe
;
14501 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14502 line_ptr
+= bytes_read
;
14503 if (lh
->num_file_names
< file
|| file
== 0)
14504 dwarf2_debug_line_missing_file_complaint ();
14507 fe
= &lh
->file_names
[file
- 1];
14509 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14510 if (!decode_for_pst_p
)
14512 last_subfile
= current_subfile
;
14513 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
14518 case DW_LNS_set_column
:
14519 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14520 line_ptr
+= bytes_read
;
14522 case DW_LNS_negate_stmt
:
14523 is_stmt
= (!is_stmt
);
14525 case DW_LNS_set_basic_block
:
14528 /* Add to the address register of the state machine the
14529 address increment value corresponding to special opcode
14530 255. I.e., this value is scaled by the minimum
14531 instruction length since special opcode 255 would have
14532 scaled the increment. */
14533 case DW_LNS_const_add_pc
:
14535 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
14537 address
+= (((op_index
+ adjust
)
14538 / lh
->maximum_ops_per_instruction
)
14539 * lh
->minimum_instruction_length
);
14540 op_index
= ((op_index
+ adjust
)
14541 % lh
->maximum_ops_per_instruction
);
14544 case DW_LNS_fixed_advance_pc
:
14545 address
+= read_2_bytes (abfd
, line_ptr
);
14551 /* Unknown standard opcode, ignore it. */
14554 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
14556 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
14557 line_ptr
+= bytes_read
;
14562 if (lh
->num_file_names
< file
|| file
== 0)
14563 dwarf2_debug_line_missing_file_complaint ();
14566 lh
->file_names
[file
- 1].included_p
= 1;
14567 if (!decode_for_pst_p
)
14569 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
14570 (*p_record_line
) (current_subfile
, 0, addr
);
14576 /* Decode the Line Number Program (LNP) for the given line_header
14577 structure and CU. The actual information extracted and the type
14578 of structures created from the LNP depends on the value of PST.
14580 1. If PST is NULL, then this procedure uses the data from the program
14581 to create all necessary symbol tables, and their linetables.
14583 2. If PST is not NULL, this procedure reads the program to determine
14584 the list of files included by the unit represented by PST, and
14585 builds all the associated partial symbol tables.
14587 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
14588 It is used for relative paths in the line table.
14589 NOTE: When processing partial symtabs (pst != NULL),
14590 comp_dir == pst->dirname.
14592 NOTE: It is important that psymtabs have the same file name (via strcmp)
14593 as the corresponding symtab. Since COMP_DIR is not used in the name of the
14594 symtab we don't use it in the name of the psymtabs we create.
14595 E.g. expand_line_sal requires this when finding psymtabs to expand.
14596 A good testcase for this is mb-inline.exp. */
14599 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
14600 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
14601 int want_line_info
)
14603 struct objfile
*objfile
= cu
->objfile
;
14604 const int decode_for_pst_p
= (pst
!= NULL
);
14605 struct subfile
*first_subfile
= current_subfile
;
14607 if (want_line_info
)
14608 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
14610 if (decode_for_pst_p
)
14614 /* Now that we're done scanning the Line Header Program, we can
14615 create the psymtab of each included file. */
14616 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
14617 if (lh
->file_names
[file_index
].included_p
== 1)
14619 char *include_name
=
14620 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
14621 if (include_name
!= NULL
)
14622 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
14627 /* Make sure a symtab is created for every file, even files
14628 which contain only variables (i.e. no code with associated
14632 for (i
= 0; i
< lh
->num_file_names
; i
++)
14635 struct file_entry
*fe
;
14637 fe
= &lh
->file_names
[i
];
14639 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14640 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
14642 /* Skip the main file; we don't need it, and it must be
14643 allocated last, so that it will show up before the
14644 non-primary symtabs in the objfile's symtab list. */
14645 if (current_subfile
== first_subfile
)
14648 if (current_subfile
->symtab
== NULL
)
14649 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
14651 fe
->symtab
= current_subfile
->symtab
;
14656 /* Start a subfile for DWARF. FILENAME is the name of the file and
14657 DIRNAME the name of the source directory which contains FILENAME
14658 or NULL if not known. COMP_DIR is the compilation directory for the
14659 linetable's compilation unit or NULL if not known.
14660 This routine tries to keep line numbers from identical absolute and
14661 relative file names in a common subfile.
14663 Using the `list' example from the GDB testsuite, which resides in
14664 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
14665 of /srcdir/list0.c yields the following debugging information for list0.c:
14667 DW_AT_name: /srcdir/list0.c
14668 DW_AT_comp_dir: /compdir
14669 files.files[0].name: list0.h
14670 files.files[0].dir: /srcdir
14671 files.files[1].name: list0.c
14672 files.files[1].dir: /srcdir
14674 The line number information for list0.c has to end up in a single
14675 subfile, so that `break /srcdir/list0.c:1' works as expected.
14676 start_subfile will ensure that this happens provided that we pass the
14677 concatenation of files.files[1].dir and files.files[1].name as the
14681 dwarf2_start_subfile (char *filename
, const char *dirname
,
14682 const char *comp_dir
)
14686 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
14687 `start_symtab' will always pass the contents of DW_AT_comp_dir as
14688 second argument to start_subfile. To be consistent, we do the
14689 same here. In order not to lose the line information directory,
14690 we concatenate it to the filename when it makes sense.
14691 Note that the Dwarf3 standard says (speaking of filenames in line
14692 information): ``The directory index is ignored for file names
14693 that represent full path names''. Thus ignoring dirname in the
14694 `else' branch below isn't an issue. */
14696 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
14697 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
14699 fullname
= filename
;
14701 start_subfile (fullname
, comp_dir
);
14703 if (fullname
!= filename
)
14707 /* Start a symtab for DWARF.
14708 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
14711 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
14712 char *name
, char *comp_dir
, CORE_ADDR low_pc
)
14714 start_symtab (name
, comp_dir
, low_pc
);
14715 record_debugformat ("DWARF 2");
14716 record_producer (cu
->producer
);
14718 /* We assume that we're processing GCC output. */
14719 processing_gcc_compilation
= 2;
14721 processing_has_namespace_info
= 0;
14725 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
14726 struct dwarf2_cu
*cu
)
14728 struct objfile
*objfile
= cu
->objfile
;
14729 struct comp_unit_head
*cu_header
= &cu
->header
;
14731 /* NOTE drow/2003-01-30: There used to be a comment and some special
14732 code here to turn a symbol with DW_AT_external and a
14733 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
14734 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
14735 with some versions of binutils) where shared libraries could have
14736 relocations against symbols in their debug information - the
14737 minimal symbol would have the right address, but the debug info
14738 would not. It's no longer necessary, because we will explicitly
14739 apply relocations when we read in the debug information now. */
14741 /* A DW_AT_location attribute with no contents indicates that a
14742 variable has been optimized away. */
14743 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
14745 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
14749 /* Handle one degenerate form of location expression specially, to
14750 preserve GDB's previous behavior when section offsets are
14751 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
14752 then mark this symbol as LOC_STATIC. */
14754 if (attr_form_is_block (attr
)
14755 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
14756 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
14757 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
14758 && (DW_BLOCK (attr
)->size
14759 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
14761 unsigned int dummy
;
14763 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
14764 SYMBOL_VALUE_ADDRESS (sym
) =
14765 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
14767 SYMBOL_VALUE_ADDRESS (sym
) =
14768 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
14769 SYMBOL_CLASS (sym
) = LOC_STATIC
;
14770 fixup_symbol_section (sym
, objfile
);
14771 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
14772 SYMBOL_SECTION (sym
));
14776 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
14777 expression evaluator, and use LOC_COMPUTED only when necessary
14778 (i.e. when the value of a register or memory location is
14779 referenced, or a thread-local block, etc.). Then again, it might
14780 not be worthwhile. I'm assuming that it isn't unless performance
14781 or memory numbers show me otherwise. */
14783 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
14784 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
14786 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
14787 cu
->has_loclist
= 1;
14790 /* Given a pointer to a DWARF information entry, figure out if we need
14791 to make a symbol table entry for it, and if so, create a new entry
14792 and return a pointer to it.
14793 If TYPE is NULL, determine symbol type from the die, otherwise
14794 used the passed type.
14795 If SPACE is not NULL, use it to hold the new symbol. If it is
14796 NULL, allocate a new symbol on the objfile's obstack. */
14798 static struct symbol
*
14799 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
14800 struct symbol
*space
)
14802 struct objfile
*objfile
= cu
->objfile
;
14803 struct symbol
*sym
= NULL
;
14805 struct attribute
*attr
= NULL
;
14806 struct attribute
*attr2
= NULL
;
14807 CORE_ADDR baseaddr
;
14808 struct pending
**list_to_add
= NULL
;
14810 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
14812 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14814 name
= dwarf2_name (die
, cu
);
14817 const char *linkagename
;
14818 int suppress_add
= 0;
14823 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
14824 OBJSTAT (objfile
, n_syms
++);
14826 /* Cache this symbol's name and the name's demangled form (if any). */
14827 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
14828 linkagename
= dwarf2_physname (name
, die
, cu
);
14829 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
14831 /* Fortran does not have mangling standard and the mangling does differ
14832 between gfortran, iFort etc. */
14833 if (cu
->language
== language_fortran
14834 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
14835 symbol_set_demangled_name (&(sym
->ginfo
),
14836 (char *) dwarf2_full_name (name
, die
, cu
),
14839 /* Default assumptions.
14840 Use the passed type or decode it from the die. */
14841 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
14842 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
14844 SYMBOL_TYPE (sym
) = type
;
14846 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
14847 attr
= dwarf2_attr (die
,
14848 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
14852 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
14855 attr
= dwarf2_attr (die
,
14856 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
14860 int file_index
= DW_UNSND (attr
);
14862 if (cu
->line_header
== NULL
14863 || file_index
> cu
->line_header
->num_file_names
)
14864 complaint (&symfile_complaints
,
14865 _("file index out of range"));
14866 else if (file_index
> 0)
14868 struct file_entry
*fe
;
14870 fe
= &cu
->line_header
->file_names
[file_index
- 1];
14871 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
14878 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14881 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
14883 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
14884 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
14885 SYMBOL_CLASS (sym
) = LOC_LABEL
;
14886 add_symbol_to_list (sym
, cu
->list_in_scope
);
14888 case DW_TAG_subprogram
:
14889 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
14891 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
14892 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14893 if ((attr2
&& (DW_UNSND (attr2
) != 0))
14894 || cu
->language
== language_ada
)
14896 /* Subprograms marked external are stored as a global symbol.
14897 Ada subprograms, whether marked external or not, are always
14898 stored as a global symbol, because we want to be able to
14899 access them globally. For instance, we want to be able
14900 to break on a nested subprogram without having to
14901 specify the context. */
14902 list_to_add
= &global_symbols
;
14906 list_to_add
= cu
->list_in_scope
;
14909 case DW_TAG_inlined_subroutine
:
14910 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
14912 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
14913 SYMBOL_INLINED (sym
) = 1;
14914 list_to_add
= cu
->list_in_scope
;
14916 case DW_TAG_template_value_param
:
14918 /* Fall through. */
14919 case DW_TAG_constant
:
14920 case DW_TAG_variable
:
14921 case DW_TAG_member
:
14922 /* Compilation with minimal debug info may result in
14923 variables with missing type entries. Change the
14924 misleading `void' type to something sensible. */
14925 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
14927 = objfile_type (objfile
)->nodebug_data_symbol
;
14929 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14930 /* In the case of DW_TAG_member, we should only be called for
14931 static const members. */
14932 if (die
->tag
== DW_TAG_member
)
14934 /* dwarf2_add_field uses die_is_declaration,
14935 so we do the same. */
14936 gdb_assert (die_is_declaration (die
, cu
));
14941 dwarf2_const_value (attr
, sym
, cu
);
14942 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14945 if (attr2
&& (DW_UNSND (attr2
) != 0))
14946 list_to_add
= &global_symbols
;
14948 list_to_add
= cu
->list_in_scope
;
14952 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14955 var_decode_location (attr
, sym
, cu
);
14956 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
14958 /* Fortran explicitly imports any global symbols to the local
14959 scope by DW_TAG_common_block. */
14960 if (cu
->language
== language_fortran
&& die
->parent
14961 && die
->parent
->tag
== DW_TAG_common_block
)
14964 if (SYMBOL_CLASS (sym
) == LOC_STATIC
14965 && SYMBOL_VALUE_ADDRESS (sym
) == 0
14966 && !dwarf2_per_objfile
->has_section_at_zero
)
14968 /* When a static variable is eliminated by the linker,
14969 the corresponding debug information is not stripped
14970 out, but the variable address is set to null;
14971 do not add such variables into symbol table. */
14973 else if (attr2
&& (DW_UNSND (attr2
) != 0))
14975 /* Workaround gfortran PR debug/40040 - it uses
14976 DW_AT_location for variables in -fPIC libraries which may
14977 get overriden by other libraries/executable and get
14978 a different address. Resolve it by the minimal symbol
14979 which may come from inferior's executable using copy
14980 relocation. Make this workaround only for gfortran as for
14981 other compilers GDB cannot guess the minimal symbol
14982 Fortran mangling kind. */
14983 if (cu
->language
== language_fortran
&& die
->parent
14984 && die
->parent
->tag
== DW_TAG_module
14986 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
14987 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
14989 /* A variable with DW_AT_external is never static,
14990 but it may be block-scoped. */
14991 list_to_add
= (cu
->list_in_scope
== &file_symbols
14992 ? &global_symbols
: cu
->list_in_scope
);
14995 list_to_add
= cu
->list_in_scope
;
14999 /* We do not know the address of this symbol.
15000 If it is an external symbol and we have type information
15001 for it, enter the symbol as a LOC_UNRESOLVED symbol.
15002 The address of the variable will then be determined from
15003 the minimal symbol table whenever the variable is
15005 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
15006 if (attr2
&& (DW_UNSND (attr2
) != 0)
15007 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
15009 /* A variable with DW_AT_external is never static, but it
15010 may be block-scoped. */
15011 list_to_add
= (cu
->list_in_scope
== &file_symbols
15012 ? &global_symbols
: cu
->list_in_scope
);
15014 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
15016 else if (!die_is_declaration (die
, cu
))
15018 /* Use the default LOC_OPTIMIZED_OUT class. */
15019 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
15021 list_to_add
= cu
->list_in_scope
;
15025 case DW_TAG_formal_parameter
:
15026 /* If we are inside a function, mark this as an argument. If
15027 not, we might be looking at an argument to an inlined function
15028 when we do not have enough information to show inlined frames;
15029 pretend it's a local variable in that case so that the user can
15031 if (context_stack_depth
> 0
15032 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
15033 SYMBOL_IS_ARGUMENT (sym
) = 1;
15034 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
15037 var_decode_location (attr
, sym
, cu
);
15039 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15042 dwarf2_const_value (attr
, sym
, cu
);
15045 list_to_add
= cu
->list_in_scope
;
15047 case DW_TAG_unspecified_parameters
:
15048 /* From varargs functions; gdb doesn't seem to have any
15049 interest in this information, so just ignore it for now.
15052 case DW_TAG_template_type_param
:
15054 /* Fall through. */
15055 case DW_TAG_class_type
:
15056 case DW_TAG_interface_type
:
15057 case DW_TAG_structure_type
:
15058 case DW_TAG_union_type
:
15059 case DW_TAG_set_type
:
15060 case DW_TAG_enumeration_type
:
15061 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15062 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
15065 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
15066 really ever be static objects: otherwise, if you try
15067 to, say, break of a class's method and you're in a file
15068 which doesn't mention that class, it won't work unless
15069 the check for all static symbols in lookup_symbol_aux
15070 saves you. See the OtherFileClass tests in
15071 gdb.c++/namespace.exp. */
15075 list_to_add
= (cu
->list_in_scope
== &file_symbols
15076 && (cu
->language
== language_cplus
15077 || cu
->language
== language_java
)
15078 ? &global_symbols
: cu
->list_in_scope
);
15080 /* The semantics of C++ state that "struct foo {
15081 ... }" also defines a typedef for "foo". A Java
15082 class declaration also defines a typedef for the
15084 if (cu
->language
== language_cplus
15085 || cu
->language
== language_java
15086 || cu
->language
== language_ada
)
15088 /* The symbol's name is already allocated along
15089 with this objfile, so we don't need to
15090 duplicate it for the type. */
15091 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
15092 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
15097 case DW_TAG_typedef
:
15098 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15099 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15100 list_to_add
= cu
->list_in_scope
;
15102 case DW_TAG_base_type
:
15103 case DW_TAG_subrange_type
:
15104 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15105 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
15106 list_to_add
= cu
->list_in_scope
;
15108 case DW_TAG_enumerator
:
15109 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15112 dwarf2_const_value (attr
, sym
, cu
);
15115 /* NOTE: carlton/2003-11-10: See comment above in the
15116 DW_TAG_class_type, etc. block. */
15118 list_to_add
= (cu
->list_in_scope
== &file_symbols
15119 && (cu
->language
== language_cplus
15120 || cu
->language
== language_java
)
15121 ? &global_symbols
: cu
->list_in_scope
);
15124 case DW_TAG_namespace
:
15125 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
15126 list_to_add
= &global_symbols
;
15128 case DW_TAG_common_block
:
15129 SYMBOL_CLASS (sym
) = LOC_STATIC
;
15130 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
15131 add_symbol_to_list (sym
, cu
->list_in_scope
);
15134 /* Not a tag we recognize. Hopefully we aren't processing
15135 trash data, but since we must specifically ignore things
15136 we don't recognize, there is nothing else we should do at
15138 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
15139 dwarf_tag_name (die
->tag
));
15145 sym
->hash_next
= objfile
->template_symbols
;
15146 objfile
->template_symbols
= sym
;
15147 list_to_add
= NULL
;
15150 if (list_to_add
!= NULL
)
15151 add_symbol_to_list (sym
, list_to_add
);
15153 /* For the benefit of old versions of GCC, check for anonymous
15154 namespaces based on the demangled name. */
15155 if (!processing_has_namespace_info
15156 && cu
->language
== language_cplus
)
15157 cp_scan_for_anonymous_namespaces (sym
, objfile
);
15162 /* A wrapper for new_symbol_full that always allocates a new symbol. */
15164 static struct symbol
*
15165 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
15167 return new_symbol_full (die
, type
, cu
, NULL
);
15170 /* Given an attr with a DW_FORM_dataN value in host byte order,
15171 zero-extend it as appropriate for the symbol's type. The DWARF
15172 standard (v4) is not entirely clear about the meaning of using
15173 DW_FORM_dataN for a constant with a signed type, where the type is
15174 wider than the data. The conclusion of a discussion on the DWARF
15175 list was that this is unspecified. We choose to always zero-extend
15176 because that is the interpretation long in use by GCC. */
15179 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
15180 const char *name
, struct obstack
*obstack
,
15181 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
15183 struct objfile
*objfile
= cu
->objfile
;
15184 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
15185 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
15186 LONGEST l
= DW_UNSND (attr
);
15188 if (bits
< sizeof (*value
) * 8)
15190 l
&= ((LONGEST
) 1 << bits
) - 1;
15193 else if (bits
== sizeof (*value
) * 8)
15197 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
15198 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
15205 /* Read a constant value from an attribute. Either set *VALUE, or if
15206 the value does not fit in *VALUE, set *BYTES - either already
15207 allocated on the objfile obstack, or newly allocated on OBSTACK,
15208 or, set *BATON, if we translated the constant to a location
15212 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
15213 const char *name
, struct obstack
*obstack
,
15214 struct dwarf2_cu
*cu
,
15215 LONGEST
*value
, gdb_byte
**bytes
,
15216 struct dwarf2_locexpr_baton
**baton
)
15218 struct objfile
*objfile
= cu
->objfile
;
15219 struct comp_unit_head
*cu_header
= &cu
->header
;
15220 struct dwarf_block
*blk
;
15221 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
15222 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
15228 switch (attr
->form
)
15231 case DW_FORM_GNU_addr_index
:
15235 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
15236 dwarf2_const_value_length_mismatch_complaint (name
,
15237 cu_header
->addr_size
,
15238 TYPE_LENGTH (type
));
15239 /* Symbols of this form are reasonably rare, so we just
15240 piggyback on the existing location code rather than writing
15241 a new implementation of symbol_computed_ops. */
15242 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
15243 sizeof (struct dwarf2_locexpr_baton
));
15244 (*baton
)->per_cu
= cu
->per_cu
;
15245 gdb_assert ((*baton
)->per_cu
);
15247 (*baton
)->size
= 2 + cu_header
->addr_size
;
15248 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
15249 (*baton
)->data
= data
;
15251 data
[0] = DW_OP_addr
;
15252 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
15253 byte_order
, DW_ADDR (attr
));
15254 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
15257 case DW_FORM_string
:
15259 case DW_FORM_GNU_str_index
:
15260 case DW_FORM_GNU_strp_alt
:
15261 /* DW_STRING is already allocated on the objfile obstack, point
15263 *bytes
= (gdb_byte
*) DW_STRING (attr
);
15265 case DW_FORM_block1
:
15266 case DW_FORM_block2
:
15267 case DW_FORM_block4
:
15268 case DW_FORM_block
:
15269 case DW_FORM_exprloc
:
15270 blk
= DW_BLOCK (attr
);
15271 if (TYPE_LENGTH (type
) != blk
->size
)
15272 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
15273 TYPE_LENGTH (type
));
15274 *bytes
= blk
->data
;
15277 /* The DW_AT_const_value attributes are supposed to carry the
15278 symbol's value "represented as it would be on the target
15279 architecture." By the time we get here, it's already been
15280 converted to host endianness, so we just need to sign- or
15281 zero-extend it as appropriate. */
15282 case DW_FORM_data1
:
15283 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
15284 obstack
, cu
, value
, 8);
15286 case DW_FORM_data2
:
15287 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
15288 obstack
, cu
, value
, 16);
15290 case DW_FORM_data4
:
15291 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
15292 obstack
, cu
, value
, 32);
15294 case DW_FORM_data8
:
15295 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
15296 obstack
, cu
, value
, 64);
15299 case DW_FORM_sdata
:
15300 *value
= DW_SND (attr
);
15303 case DW_FORM_udata
:
15304 *value
= DW_UNSND (attr
);
15308 complaint (&symfile_complaints
,
15309 _("unsupported const value attribute form: '%s'"),
15310 dwarf_form_name (attr
->form
));
15317 /* Copy constant value from an attribute to a symbol. */
15320 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
15321 struct dwarf2_cu
*cu
)
15323 struct objfile
*objfile
= cu
->objfile
;
15324 struct comp_unit_head
*cu_header
= &cu
->header
;
15327 struct dwarf2_locexpr_baton
*baton
;
15329 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
15330 SYMBOL_PRINT_NAME (sym
),
15331 &objfile
->objfile_obstack
, cu
,
15332 &value
, &bytes
, &baton
);
15336 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
15337 SYMBOL_LOCATION_BATON (sym
) = baton
;
15338 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
15340 else if (bytes
!= NULL
)
15342 SYMBOL_VALUE_BYTES (sym
) = bytes
;
15343 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
15347 SYMBOL_VALUE (sym
) = value
;
15348 SYMBOL_CLASS (sym
) = LOC_CONST
;
15352 /* Return the type of the die in question using its DW_AT_type attribute. */
15354 static struct type
*
15355 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15357 struct attribute
*type_attr
;
15359 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
15362 /* A missing DW_AT_type represents a void type. */
15363 return objfile_type (cu
->objfile
)->builtin_void
;
15366 return lookup_die_type (die
, type_attr
, cu
);
15369 /* True iff CU's producer generates GNAT Ada auxiliary information
15370 that allows to find parallel types through that information instead
15371 of having to do expensive parallel lookups by type name. */
15374 need_gnat_info (struct dwarf2_cu
*cu
)
15376 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
15377 of GNAT produces this auxiliary information, without any indication
15378 that it is produced. Part of enhancing the FSF version of GNAT
15379 to produce that information will be to put in place an indicator
15380 that we can use in order to determine whether the descriptive type
15381 info is available or not. One suggestion that has been made is
15382 to use a new attribute, attached to the CU die. For now, assume
15383 that the descriptive type info is not available. */
15387 /* Return the auxiliary type of the die in question using its
15388 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
15389 attribute is not present. */
15391 static struct type
*
15392 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15394 struct attribute
*type_attr
;
15396 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
15400 return lookup_die_type (die
, type_attr
, cu
);
15403 /* If DIE has a descriptive_type attribute, then set the TYPE's
15404 descriptive type accordingly. */
15407 set_descriptive_type (struct type
*type
, struct die_info
*die
,
15408 struct dwarf2_cu
*cu
)
15410 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
15412 if (descriptive_type
)
15414 ALLOCATE_GNAT_AUX_TYPE (type
);
15415 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
15419 /* Return the containing type of the die in question using its
15420 DW_AT_containing_type attribute. */
15422 static struct type
*
15423 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15425 struct attribute
*type_attr
;
15427 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
15429 error (_("Dwarf Error: Problem turning containing type into gdb type "
15430 "[in module %s]"), cu
->objfile
->name
);
15432 return lookup_die_type (die
, type_attr
, cu
);
15435 /* Look up the type of DIE in CU using its type attribute ATTR.
15436 If there is no type substitute an error marker. */
15438 static struct type
*
15439 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
15440 struct dwarf2_cu
*cu
)
15442 struct objfile
*objfile
= cu
->objfile
;
15443 struct type
*this_type
;
15445 /* First see if we have it cached. */
15447 if (attr
->form
== DW_FORM_GNU_ref_alt
)
15449 struct dwarf2_per_cu_data
*per_cu
;
15450 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
15452 per_cu
= dwarf2_find_containing_comp_unit (offset
, 1, cu
->objfile
);
15453 this_type
= get_die_type_at_offset (offset
, per_cu
);
15455 else if (is_ref_attr (attr
))
15457 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
15459 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
15461 else if (attr
->form
== DW_FORM_ref_sig8
)
15463 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
15465 /* sig_type will be NULL if the signatured type is missing from
15467 if (sig_type
== NULL
)
15468 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
15469 "at 0x%x [in module %s]"),
15470 die
->offset
.sect_off
, objfile
->name
);
15472 gdb_assert (sig_type
->per_cu
.is_debug_types
);
15473 /* If we haven't filled in type_offset_in_section yet, then we
15474 haven't read the type in yet. */
15476 if (sig_type
->type_offset_in_section
.sect_off
!= 0)
15479 get_die_type_at_offset (sig_type
->type_offset_in_section
,
15480 &sig_type
->per_cu
);
15485 dump_die_for_error (die
);
15486 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
15487 dwarf_attr_name (attr
->name
), objfile
->name
);
15490 /* If not cached we need to read it in. */
15492 if (this_type
== NULL
)
15494 struct die_info
*type_die
;
15495 struct dwarf2_cu
*type_cu
= cu
;
15497 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
15498 /* If we found the type now, it's probably because the type came
15499 from an inter-CU reference and the type's CU got expanded before
15501 this_type
= get_die_type (type_die
, type_cu
);
15502 if (this_type
== NULL
)
15503 this_type
= read_type_die_1 (type_die
, type_cu
);
15506 /* If we still don't have a type use an error marker. */
15508 if (this_type
== NULL
)
15510 char *message
, *saved
;
15512 /* read_type_die already issued a complaint. */
15513 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
15515 cu
->header
.offset
.sect_off
,
15516 die
->offset
.sect_off
);
15517 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
15518 message
, strlen (message
));
15521 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
15527 /* Return the type in DIE, CU.
15528 Returns NULL for invalid types.
15530 This first does a lookup in the appropriate type_hash table,
15531 and only reads the die in if necessary.
15533 NOTE: This can be called when reading in partial or full symbols. */
15535 static struct type
*
15536 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
15538 struct type
*this_type
;
15540 this_type
= get_die_type (die
, cu
);
15544 return read_type_die_1 (die
, cu
);
15547 /* Read the type in DIE, CU.
15548 Returns NULL for invalid types. */
15550 static struct type
*
15551 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
15553 struct type
*this_type
= NULL
;
15557 case DW_TAG_class_type
:
15558 case DW_TAG_interface_type
:
15559 case DW_TAG_structure_type
:
15560 case DW_TAG_union_type
:
15561 this_type
= read_structure_type (die
, cu
);
15563 case DW_TAG_enumeration_type
:
15564 this_type
= read_enumeration_type (die
, cu
);
15566 case DW_TAG_subprogram
:
15567 case DW_TAG_subroutine_type
:
15568 case DW_TAG_inlined_subroutine
:
15569 this_type
= read_subroutine_type (die
, cu
);
15571 case DW_TAG_array_type
:
15572 this_type
= read_array_type (die
, cu
);
15574 case DW_TAG_set_type
:
15575 this_type
= read_set_type (die
, cu
);
15577 case DW_TAG_pointer_type
:
15578 this_type
= read_tag_pointer_type (die
, cu
);
15580 case DW_TAG_ptr_to_member_type
:
15581 this_type
= read_tag_ptr_to_member_type (die
, cu
);
15583 case DW_TAG_reference_type
:
15584 this_type
= read_tag_reference_type (die
, cu
);
15586 case DW_TAG_const_type
:
15587 this_type
= read_tag_const_type (die
, cu
);
15589 case DW_TAG_volatile_type
:
15590 this_type
= read_tag_volatile_type (die
, cu
);
15592 case DW_TAG_string_type
:
15593 this_type
= read_tag_string_type (die
, cu
);
15595 case DW_TAG_typedef
:
15596 this_type
= read_typedef (die
, cu
);
15598 case DW_TAG_subrange_type
:
15599 this_type
= read_subrange_type (die
, cu
);
15601 case DW_TAG_base_type
:
15602 this_type
= read_base_type (die
, cu
);
15604 case DW_TAG_unspecified_type
:
15605 this_type
= read_unspecified_type (die
, cu
);
15607 case DW_TAG_namespace
:
15608 this_type
= read_namespace_type (die
, cu
);
15610 case DW_TAG_module
:
15611 this_type
= read_module_type (die
, cu
);
15614 complaint (&symfile_complaints
,
15615 _("unexpected tag in read_type_die: '%s'"),
15616 dwarf_tag_name (die
->tag
));
15623 /* See if we can figure out if the class lives in a namespace. We do
15624 this by looking for a member function; its demangled name will
15625 contain namespace info, if there is any.
15626 Return the computed name or NULL.
15627 Space for the result is allocated on the objfile's obstack.
15628 This is the full-die version of guess_partial_die_structure_name.
15629 In this case we know DIE has no useful parent. */
15632 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
15634 struct die_info
*spec_die
;
15635 struct dwarf2_cu
*spec_cu
;
15636 struct die_info
*child
;
15639 spec_die
= die_specification (die
, &spec_cu
);
15640 if (spec_die
!= NULL
)
15646 for (child
= die
->child
;
15648 child
= child
->sibling
)
15650 if (child
->tag
== DW_TAG_subprogram
)
15652 struct attribute
*attr
;
15654 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
15656 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
15660 = language_class_name_from_physname (cu
->language_defn
,
15664 if (actual_name
!= NULL
)
15666 char *die_name
= dwarf2_name (die
, cu
);
15668 if (die_name
!= NULL
15669 && strcmp (die_name
, actual_name
) != 0)
15671 /* Strip off the class name from the full name.
15672 We want the prefix. */
15673 int die_name_len
= strlen (die_name
);
15674 int actual_name_len
= strlen (actual_name
);
15676 /* Test for '::' as a sanity check. */
15677 if (actual_name_len
> die_name_len
+ 2
15678 && actual_name
[actual_name_len
15679 - die_name_len
- 1] == ':')
15681 obsavestring (actual_name
,
15682 actual_name_len
- die_name_len
- 2,
15683 &cu
->objfile
->objfile_obstack
);
15686 xfree (actual_name
);
15695 /* GCC might emit a nameless typedef that has a linkage name. Determine the
15696 prefix part in such case. See
15697 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
15700 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
15702 struct attribute
*attr
;
15705 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
15706 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
15709 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
15710 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
15713 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
15715 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
15716 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
15719 /* dwarf2_name had to be already called. */
15720 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
15722 /* Strip the base name, keep any leading namespaces/classes. */
15723 base
= strrchr (DW_STRING (attr
), ':');
15724 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
15727 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
15728 &cu
->objfile
->objfile_obstack
);
15731 /* Return the name of the namespace/class that DIE is defined within,
15732 or "" if we can't tell. The caller should not xfree the result.
15734 For example, if we're within the method foo() in the following
15744 then determine_prefix on foo's die will return "N::C". */
15746 static const char *
15747 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
15749 struct die_info
*parent
, *spec_die
;
15750 struct dwarf2_cu
*spec_cu
;
15751 struct type
*parent_type
;
15754 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
15755 && cu
->language
!= language_fortran
)
15758 retval
= anonymous_struct_prefix (die
, cu
);
15762 /* We have to be careful in the presence of DW_AT_specification.
15763 For example, with GCC 3.4, given the code
15767 // Definition of N::foo.
15771 then we'll have a tree of DIEs like this:
15773 1: DW_TAG_compile_unit
15774 2: DW_TAG_namespace // N
15775 3: DW_TAG_subprogram // declaration of N::foo
15776 4: DW_TAG_subprogram // definition of N::foo
15777 DW_AT_specification // refers to die #3
15779 Thus, when processing die #4, we have to pretend that we're in
15780 the context of its DW_AT_specification, namely the contex of die
15783 spec_die
= die_specification (die
, &spec_cu
);
15784 if (spec_die
== NULL
)
15785 parent
= die
->parent
;
15788 parent
= spec_die
->parent
;
15792 if (parent
== NULL
)
15794 else if (parent
->building_fullname
)
15797 const char *parent_name
;
15799 /* It has been seen on RealView 2.2 built binaries,
15800 DW_TAG_template_type_param types actually _defined_ as
15801 children of the parent class:
15804 template class <class Enum> Class{};
15805 Class<enum E> class_e;
15807 1: DW_TAG_class_type (Class)
15808 2: DW_TAG_enumeration_type (E)
15809 3: DW_TAG_enumerator (enum1:0)
15810 3: DW_TAG_enumerator (enum2:1)
15812 2: DW_TAG_template_type_param
15813 DW_AT_type DW_FORM_ref_udata (E)
15815 Besides being broken debug info, it can put GDB into an
15816 infinite loop. Consider:
15818 When we're building the full name for Class<E>, we'll start
15819 at Class, and go look over its template type parameters,
15820 finding E. We'll then try to build the full name of E, and
15821 reach here. We're now trying to build the full name of E,
15822 and look over the parent DIE for containing scope. In the
15823 broken case, if we followed the parent DIE of E, we'd again
15824 find Class, and once again go look at its template type
15825 arguments, etc., etc. Simply don't consider such parent die
15826 as source-level parent of this die (it can't be, the language
15827 doesn't allow it), and break the loop here. */
15828 name
= dwarf2_name (die
, cu
);
15829 parent_name
= dwarf2_name (parent
, cu
);
15830 complaint (&symfile_complaints
,
15831 _("template param type '%s' defined within parent '%s'"),
15832 name
? name
: "<unknown>",
15833 parent_name
? parent_name
: "<unknown>");
15837 switch (parent
->tag
)
15839 case DW_TAG_namespace
:
15840 parent_type
= read_type_die (parent
, cu
);
15841 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
15842 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
15843 Work around this problem here. */
15844 if (cu
->language
== language_cplus
15845 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
15847 /* We give a name to even anonymous namespaces. */
15848 return TYPE_TAG_NAME (parent_type
);
15849 case DW_TAG_class_type
:
15850 case DW_TAG_interface_type
:
15851 case DW_TAG_structure_type
:
15852 case DW_TAG_union_type
:
15853 case DW_TAG_module
:
15854 parent_type
= read_type_die (parent
, cu
);
15855 if (TYPE_TAG_NAME (parent_type
) != NULL
)
15856 return TYPE_TAG_NAME (parent_type
);
15858 /* An anonymous structure is only allowed non-static data
15859 members; no typedefs, no member functions, et cetera.
15860 So it does not need a prefix. */
15862 case DW_TAG_compile_unit
:
15863 case DW_TAG_partial_unit
:
15864 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
15865 if (cu
->language
== language_cplus
15866 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
15867 && die
->child
!= NULL
15868 && (die
->tag
== DW_TAG_class_type
15869 || die
->tag
== DW_TAG_structure_type
15870 || die
->tag
== DW_TAG_union_type
))
15872 char *name
= guess_full_die_structure_name (die
, cu
);
15878 return determine_prefix (parent
, cu
);
15882 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
15883 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
15884 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
15885 an obconcat, otherwise allocate storage for the result. The CU argument is
15886 used to determine the language and hence, the appropriate separator. */
15888 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
15891 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
15892 int physname
, struct dwarf2_cu
*cu
)
15894 const char *lead
= "";
15897 if (suffix
== NULL
|| suffix
[0] == '\0'
15898 || prefix
== NULL
|| prefix
[0] == '\0')
15900 else if (cu
->language
== language_java
)
15902 else if (cu
->language
== language_fortran
&& physname
)
15904 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
15905 DW_AT_MIPS_linkage_name is preferred and used instead. */
15913 if (prefix
== NULL
)
15915 if (suffix
== NULL
)
15921 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
15923 strcpy (retval
, lead
);
15924 strcat (retval
, prefix
);
15925 strcat (retval
, sep
);
15926 strcat (retval
, suffix
);
15931 /* We have an obstack. */
15932 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
15936 /* Return sibling of die, NULL if no sibling. */
15938 static struct die_info
*
15939 sibling_die (struct die_info
*die
)
15941 return die
->sibling
;
15944 /* Get name of a die, return NULL if not found. */
15947 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
15948 struct obstack
*obstack
)
15950 if (name
&& cu
->language
== language_cplus
)
15952 char *canon_name
= cp_canonicalize_string (name
);
15954 if (canon_name
!= NULL
)
15956 if (strcmp (canon_name
, name
) != 0)
15957 name
= obsavestring (canon_name
, strlen (canon_name
),
15959 xfree (canon_name
);
15966 /* Get name of a die, return NULL if not found. */
15969 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
15971 struct attribute
*attr
;
15973 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
15974 if ((!attr
|| !DW_STRING (attr
))
15975 && die
->tag
!= DW_TAG_class_type
15976 && die
->tag
!= DW_TAG_interface_type
15977 && die
->tag
!= DW_TAG_structure_type
15978 && die
->tag
!= DW_TAG_union_type
)
15983 case DW_TAG_compile_unit
:
15984 case DW_TAG_partial_unit
:
15985 /* Compilation units have a DW_AT_name that is a filename, not
15986 a source language identifier. */
15987 case DW_TAG_enumeration_type
:
15988 case DW_TAG_enumerator
:
15989 /* These tags always have simple identifiers already; no need
15990 to canonicalize them. */
15991 return DW_STRING (attr
);
15993 case DW_TAG_subprogram
:
15994 /* Java constructors will all be named "<init>", so return
15995 the class name when we see this special case. */
15996 if (cu
->language
== language_java
15997 && DW_STRING (attr
) != NULL
15998 && strcmp (DW_STRING (attr
), "<init>") == 0)
16000 struct dwarf2_cu
*spec_cu
= cu
;
16001 struct die_info
*spec_die
;
16003 /* GCJ will output '<init>' for Java constructor names.
16004 For this special case, return the name of the parent class. */
16006 /* GCJ may output suprogram DIEs with AT_specification set.
16007 If so, use the name of the specified DIE. */
16008 spec_die
= die_specification (die
, &spec_cu
);
16009 if (spec_die
!= NULL
)
16010 return dwarf2_name (spec_die
, spec_cu
);
16015 if (die
->tag
== DW_TAG_class_type
)
16016 return dwarf2_name (die
, cu
);
16018 while (die
->tag
!= DW_TAG_compile_unit
16019 && die
->tag
!= DW_TAG_partial_unit
);
16023 case DW_TAG_class_type
:
16024 case DW_TAG_interface_type
:
16025 case DW_TAG_structure_type
:
16026 case DW_TAG_union_type
:
16027 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
16028 structures or unions. These were of the form "._%d" in GCC 4.1,
16029 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
16030 and GCC 4.4. We work around this problem by ignoring these. */
16031 if (attr
&& DW_STRING (attr
)
16032 && (strncmp (DW_STRING (attr
), "._", 2) == 0
16033 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
16036 /* GCC might emit a nameless typedef that has a linkage name. See
16037 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
16038 if (!attr
|| DW_STRING (attr
) == NULL
)
16040 char *demangled
= NULL
;
16042 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
16044 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
16046 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
16049 /* Avoid demangling DW_STRING (attr) the second time on a second
16050 call for the same DIE. */
16051 if (!DW_STRING_IS_CANONICAL (attr
))
16052 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
16058 /* FIXME: we already did this for the partial symbol... */
16059 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
16060 &cu
->objfile
->objfile_obstack
);
16061 DW_STRING_IS_CANONICAL (attr
) = 1;
16064 /* Strip any leading namespaces/classes, keep only the base name.
16065 DW_AT_name for named DIEs does not contain the prefixes. */
16066 base
= strrchr (DW_STRING (attr
), ':');
16067 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
16070 return DW_STRING (attr
);
16079 if (!DW_STRING_IS_CANONICAL (attr
))
16082 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
16083 &cu
->objfile
->objfile_obstack
);
16084 DW_STRING_IS_CANONICAL (attr
) = 1;
16086 return DW_STRING (attr
);
16089 /* Return the die that this die in an extension of, or NULL if there
16090 is none. *EXT_CU is the CU containing DIE on input, and the CU
16091 containing the return value on output. */
16093 static struct die_info
*
16094 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
16096 struct attribute
*attr
;
16098 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
16102 return follow_die_ref (die
, attr
, ext_cu
);
16105 /* Convert a DIE tag into its string name. */
16107 static const char *
16108 dwarf_tag_name (unsigned tag
)
16110 const char *name
= get_DW_TAG_name (tag
);
16113 return "DW_TAG_<unknown>";
16118 /* Convert a DWARF attribute code into its string name. */
16120 static const char *
16121 dwarf_attr_name (unsigned attr
)
16125 #ifdef MIPS /* collides with DW_AT_HP_block_index */
16126 if (attr
== DW_AT_MIPS_fde
)
16127 return "DW_AT_MIPS_fde";
16129 if (attr
== DW_AT_HP_block_index
)
16130 return "DW_AT_HP_block_index";
16133 name
= get_DW_AT_name (attr
);
16136 return "DW_AT_<unknown>";
16141 /* Convert a DWARF value form code into its string name. */
16143 static const char *
16144 dwarf_form_name (unsigned form
)
16146 const char *name
= get_DW_FORM_name (form
);
16149 return "DW_FORM_<unknown>";
16155 dwarf_bool_name (unsigned mybool
)
16163 /* Convert a DWARF type code into its string name. */
16165 static const char *
16166 dwarf_type_encoding_name (unsigned enc
)
16168 const char *name
= get_DW_ATE_name (enc
);
16171 return "DW_ATE_<unknown>";
16177 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
16181 print_spaces (indent
, f
);
16182 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
16183 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
.sect_off
);
16185 if (die
->parent
!= NULL
)
16187 print_spaces (indent
, f
);
16188 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
16189 die
->parent
->offset
.sect_off
);
16192 print_spaces (indent
, f
);
16193 fprintf_unfiltered (f
, " has children: %s\n",
16194 dwarf_bool_name (die
->child
!= NULL
));
16196 print_spaces (indent
, f
);
16197 fprintf_unfiltered (f
, " attributes:\n");
16199 for (i
= 0; i
< die
->num_attrs
; ++i
)
16201 print_spaces (indent
, f
);
16202 fprintf_unfiltered (f
, " %s (%s) ",
16203 dwarf_attr_name (die
->attrs
[i
].name
),
16204 dwarf_form_name (die
->attrs
[i
].form
));
16206 switch (die
->attrs
[i
].form
)
16209 case DW_FORM_GNU_addr_index
:
16210 fprintf_unfiltered (f
, "address: ");
16211 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
16213 case DW_FORM_block2
:
16214 case DW_FORM_block4
:
16215 case DW_FORM_block
:
16216 case DW_FORM_block1
:
16217 fprintf_unfiltered (f
, "block: size %s",
16218 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
16220 case DW_FORM_exprloc
:
16221 fprintf_unfiltered (f
, "expression: size %s",
16222 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
16224 case DW_FORM_ref_addr
:
16225 fprintf_unfiltered (f
, "ref address: ");
16226 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
16228 case DW_FORM_GNU_ref_alt
:
16229 fprintf_unfiltered (f
, "alt ref address: ");
16230 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
16236 case DW_FORM_ref_udata
:
16237 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
16238 (long) (DW_UNSND (&die
->attrs
[i
])));
16240 case DW_FORM_data1
:
16241 case DW_FORM_data2
:
16242 case DW_FORM_data4
:
16243 case DW_FORM_data8
:
16244 case DW_FORM_udata
:
16245 case DW_FORM_sdata
:
16246 fprintf_unfiltered (f
, "constant: %s",
16247 pulongest (DW_UNSND (&die
->attrs
[i
])));
16249 case DW_FORM_sec_offset
:
16250 fprintf_unfiltered (f
, "section offset: %s",
16251 pulongest (DW_UNSND (&die
->attrs
[i
])));
16253 case DW_FORM_ref_sig8
:
16254 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
16255 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
16256 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
.sect_off
);
16258 fprintf_unfiltered (f
, "signatured type, offset: unknown");
16260 case DW_FORM_string
:
16262 case DW_FORM_GNU_str_index
:
16263 case DW_FORM_GNU_strp_alt
:
16264 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
16265 DW_STRING (&die
->attrs
[i
])
16266 ? DW_STRING (&die
->attrs
[i
]) : "",
16267 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
16270 if (DW_UNSND (&die
->attrs
[i
]))
16271 fprintf_unfiltered (f
, "flag: TRUE");
16273 fprintf_unfiltered (f
, "flag: FALSE");
16275 case DW_FORM_flag_present
:
16276 fprintf_unfiltered (f
, "flag: TRUE");
16278 case DW_FORM_indirect
:
16279 /* The reader will have reduced the indirect form to
16280 the "base form" so this form should not occur. */
16281 fprintf_unfiltered (f
,
16282 "unexpected attribute form: DW_FORM_indirect");
16285 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
16286 die
->attrs
[i
].form
);
16289 fprintf_unfiltered (f
, "\n");
16294 dump_die_for_error (struct die_info
*die
)
16296 dump_die_shallow (gdb_stderr
, 0, die
);
16300 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
16302 int indent
= level
* 4;
16304 gdb_assert (die
!= NULL
);
16306 if (level
>= max_level
)
16309 dump_die_shallow (f
, indent
, die
);
16311 if (die
->child
!= NULL
)
16313 print_spaces (indent
, f
);
16314 fprintf_unfiltered (f
, " Children:");
16315 if (level
+ 1 < max_level
)
16317 fprintf_unfiltered (f
, "\n");
16318 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
16322 fprintf_unfiltered (f
,
16323 " [not printed, max nesting level reached]\n");
16327 if (die
->sibling
!= NULL
&& level
> 0)
16329 dump_die_1 (f
, level
, max_level
, die
->sibling
);
16333 /* This is called from the pdie macro in gdbinit.in.
16334 It's not static so gcc will keep a copy callable from gdb. */
16337 dump_die (struct die_info
*die
, int max_level
)
16339 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
16343 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
16347 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
.sect_off
,
16353 /* DW_ADDR is always stored already as sect_offset; despite for the forms
16354 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
16357 is_ref_attr (struct attribute
*attr
)
16359 switch (attr
->form
)
16361 case DW_FORM_ref_addr
:
16366 case DW_FORM_ref_udata
:
16367 case DW_FORM_GNU_ref_alt
:
16374 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
16378 dwarf2_get_ref_die_offset (struct attribute
*attr
)
16380 sect_offset retval
= { DW_UNSND (attr
) };
16382 if (is_ref_attr (attr
))
16385 retval
.sect_off
= 0;
16386 complaint (&symfile_complaints
,
16387 _("unsupported die ref attribute form: '%s'"),
16388 dwarf_form_name (attr
->form
));
16392 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
16393 * the value held by the attribute is not constant. */
16396 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
16398 if (attr
->form
== DW_FORM_sdata
)
16399 return DW_SND (attr
);
16400 else if (attr
->form
== DW_FORM_udata
16401 || attr
->form
== DW_FORM_data1
16402 || attr
->form
== DW_FORM_data2
16403 || attr
->form
== DW_FORM_data4
16404 || attr
->form
== DW_FORM_data8
)
16405 return DW_UNSND (attr
);
16408 complaint (&symfile_complaints
,
16409 _("Attribute value is not a constant (%s)"),
16410 dwarf_form_name (attr
->form
));
16411 return default_value
;
16415 /* Follow reference or signature attribute ATTR of SRC_DIE.
16416 On entry *REF_CU is the CU of SRC_DIE.
16417 On exit *REF_CU is the CU of the result. */
16419 static struct die_info
*
16420 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
16421 struct dwarf2_cu
**ref_cu
)
16423 struct die_info
*die
;
16425 if (is_ref_attr (attr
))
16426 die
= follow_die_ref (src_die
, attr
, ref_cu
);
16427 else if (attr
->form
== DW_FORM_ref_sig8
)
16428 die
= follow_die_sig (src_die
, attr
, ref_cu
);
16431 dump_die_for_error (src_die
);
16432 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
16433 (*ref_cu
)->objfile
->name
);
16439 /* Follow reference OFFSET.
16440 On entry *REF_CU is the CU of the source die referencing OFFSET.
16441 On exit *REF_CU is the CU of the result.
16442 Returns NULL if OFFSET is invalid. */
16444 static struct die_info
*
16445 follow_die_offset (sect_offset offset
, int offset_in_dwz
,
16446 struct dwarf2_cu
**ref_cu
)
16448 struct die_info temp_die
;
16449 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
16451 gdb_assert (cu
->per_cu
!= NULL
);
16455 if (cu
->per_cu
->is_debug_types
)
16457 /* .debug_types CUs cannot reference anything outside their CU.
16458 If they need to, they have to reference a signatured type via
16459 DW_FORM_ref_sig8. */
16460 if (! offset_in_cu_p (&cu
->header
, offset
))
16463 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
16464 || ! offset_in_cu_p (&cu
->header
, offset
))
16466 struct dwarf2_per_cu_data
*per_cu
;
16468 per_cu
= dwarf2_find_containing_comp_unit (offset
, offset_in_dwz
,
16471 /* If necessary, add it to the queue and load its DIEs. */
16472 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
16473 load_full_comp_unit (per_cu
, cu
->language
);
16475 target_cu
= per_cu
->cu
;
16477 else if (cu
->dies
== NULL
)
16479 /* We're loading full DIEs during partial symbol reading. */
16480 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
16481 load_full_comp_unit (cu
->per_cu
, language_minimal
);
16484 *ref_cu
= target_cu
;
16485 temp_die
.offset
= offset
;
16486 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
.sect_off
);
16489 /* Follow reference attribute ATTR of SRC_DIE.
16490 On entry *REF_CU is the CU of SRC_DIE.
16491 On exit *REF_CU is the CU of the result. */
16493 static struct die_info
*
16494 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
16495 struct dwarf2_cu
**ref_cu
)
16497 sect_offset offset
= dwarf2_get_ref_die_offset (attr
);
16498 struct dwarf2_cu
*cu
= *ref_cu
;
16499 struct die_info
*die
;
16501 die
= follow_die_offset (offset
,
16502 (attr
->form
== DW_FORM_GNU_ref_alt
16503 || cu
->per_cu
->is_dwz
),
16506 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
16507 "at 0x%x [in module %s]"),
16508 offset
.sect_off
, src_die
->offset
.sect_off
, cu
->objfile
->name
);
16513 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
16514 Returned value is intended for DW_OP_call*. Returned
16515 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
16517 struct dwarf2_locexpr_baton
16518 dwarf2_fetch_die_location_block (cu_offset offset_in_cu
,
16519 struct dwarf2_per_cu_data
*per_cu
,
16520 CORE_ADDR (*get_frame_pc
) (void *baton
),
16523 sect_offset offset
= { per_cu
->offset
.sect_off
+ offset_in_cu
.cu_off
};
16524 struct dwarf2_cu
*cu
;
16525 struct die_info
*die
;
16526 struct attribute
*attr
;
16527 struct dwarf2_locexpr_baton retval
;
16529 dw2_setup (per_cu
->objfile
);
16531 if (per_cu
->cu
== NULL
)
16535 die
= follow_die_offset (offset
, per_cu
->is_dwz
, &cu
);
16537 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
16538 offset
.sect_off
, per_cu
->objfile
->name
);
16540 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16543 /* DWARF: "If there is no such attribute, then there is no effect.".
16544 DATA is ignored if SIZE is 0. */
16546 retval
.data
= NULL
;
16549 else if (attr_form_is_section_offset (attr
))
16551 struct dwarf2_loclist_baton loclist_baton
;
16552 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
16555 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
16557 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
16559 retval
.size
= size
;
16563 if (!attr_form_is_block (attr
))
16564 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
16565 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
16566 offset
.sect_off
, per_cu
->objfile
->name
);
16568 retval
.data
= DW_BLOCK (attr
)->data
;
16569 retval
.size
= DW_BLOCK (attr
)->size
;
16571 retval
.per_cu
= cu
->per_cu
;
16573 age_cached_comp_units ();
16578 /* Return the type of the DIE at DIE_OFFSET in the CU named by
16582 dwarf2_get_die_type (cu_offset die_offset
,
16583 struct dwarf2_per_cu_data
*per_cu
)
16585 sect_offset die_offset_sect
;
16587 dw2_setup (per_cu
->objfile
);
16589 die_offset_sect
.sect_off
= per_cu
->offset
.sect_off
+ die_offset
.cu_off
;
16590 return get_die_type_at_offset (die_offset_sect
, per_cu
);
16593 /* Follow the signature attribute ATTR in SRC_DIE.
16594 On entry *REF_CU is the CU of SRC_DIE.
16595 On exit *REF_CU is the CU of the result. */
16597 static struct die_info
*
16598 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
16599 struct dwarf2_cu
**ref_cu
)
16601 struct objfile
*objfile
= (*ref_cu
)->objfile
;
16602 struct die_info temp_die
;
16603 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
16604 struct dwarf2_cu
*sig_cu
;
16605 struct die_info
*die
;
16607 /* sig_type will be NULL if the signatured type is missing from
16609 if (sig_type
== NULL
)
16610 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
16611 "at 0x%x [in module %s]"),
16612 src_die
->offset
.sect_off
, objfile
->name
);
16614 /* If necessary, add it to the queue and load its DIEs. */
16616 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
16617 read_signatured_type (sig_type
);
16619 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
16621 sig_cu
= sig_type
->per_cu
.cu
;
16622 gdb_assert (sig_type
->type_offset_in_section
.sect_off
!= 0);
16623 temp_die
.offset
= sig_type
->type_offset_in_section
;
16624 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
16625 temp_die
.offset
.sect_off
);
16632 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
16633 "from DIE at 0x%x [in module %s]"),
16634 temp_die
.offset
.sect_off
, src_die
->offset
.sect_off
, objfile
->name
);
16637 /* Given an offset of a signatured type, return its signatured_type. */
16639 static struct signatured_type
*
16640 lookup_signatured_type_at_offset (struct objfile
*objfile
,
16641 struct dwarf2_section_info
*section
,
16642 sect_offset offset
)
16644 gdb_byte
*info_ptr
= section
->buffer
+ offset
.sect_off
;
16645 unsigned int length
, initial_length_size
;
16646 unsigned int sig_offset
;
16647 struct signatured_type find_entry
, *sig_type
;
16649 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
16650 sig_offset
= (initial_length_size
16652 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
16653 + 1 /*address_size*/);
16654 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
16655 sig_type
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
16657 /* This is only used to lookup previously recorded types.
16658 If we didn't find it, it's our bug. */
16659 gdb_assert (sig_type
!= NULL
);
16660 gdb_assert (offset
.sect_off
== sig_type
->per_cu
.offset
.sect_off
);
16665 /* Load the DIEs associated with type unit PER_CU into memory. */
16668 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
16670 struct signatured_type
*sig_type
;
16672 /* Caller is responsible for ensuring type_unit_groups don't get here. */
16673 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
16675 /* We have the per_cu, but we need the signatured_type.
16676 Fortunately this is an easy translation. */
16677 gdb_assert (per_cu
->is_debug_types
);
16678 sig_type
= (struct signatured_type
*) per_cu
;
16680 gdb_assert (per_cu
->cu
== NULL
);
16682 read_signatured_type (sig_type
);
16684 gdb_assert (per_cu
->cu
!= NULL
);
16687 /* die_reader_func for read_signatured_type.
16688 This is identical to load_full_comp_unit_reader,
16689 but is kept separate for now. */
16692 read_signatured_type_reader (const struct die_reader_specs
*reader
,
16693 gdb_byte
*info_ptr
,
16694 struct die_info
*comp_unit_die
,
16698 struct dwarf2_cu
*cu
= reader
->cu
;
16700 gdb_assert (cu
->die_hash
== NULL
);
16702 htab_create_alloc_ex (cu
->header
.length
/ 12,
16706 &cu
->comp_unit_obstack
,
16707 hashtab_obstack_allocate
,
16708 dummy_obstack_deallocate
);
16711 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
16712 &info_ptr
, comp_unit_die
);
16713 cu
->dies
= comp_unit_die
;
16714 /* comp_unit_die is not stored in die_hash, no need. */
16716 /* We try not to read any attributes in this function, because not
16717 all CUs needed for references have been loaded yet, and symbol
16718 table processing isn't initialized. But we have to set the CU language,
16719 or we won't be able to build types correctly.
16720 Similarly, if we do not read the producer, we can not apply
16721 producer-specific interpretation. */
16722 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
16725 /* Read in a signatured type and build its CU and DIEs.
16726 If the type is a stub for the real type in a DWO file,
16727 read in the real type from the DWO file as well. */
16730 read_signatured_type (struct signatured_type
*sig_type
)
16732 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
16734 gdb_assert (per_cu
->is_debug_types
);
16735 gdb_assert (per_cu
->cu
== NULL
);
16737 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
16738 read_signatured_type_reader
, NULL
);
16741 /* Decode simple location descriptions.
16742 Given a pointer to a dwarf block that defines a location, compute
16743 the location and return the value.
16745 NOTE drow/2003-11-18: This function is called in two situations
16746 now: for the address of static or global variables (partial symbols
16747 only) and for offsets into structures which are expected to be
16748 (more or less) constant. The partial symbol case should go away,
16749 and only the constant case should remain. That will let this
16750 function complain more accurately. A few special modes are allowed
16751 without complaint for global variables (for instance, global
16752 register values and thread-local values).
16754 A location description containing no operations indicates that the
16755 object is optimized out. The return value is 0 for that case.
16756 FIXME drow/2003-11-16: No callers check for this case any more; soon all
16757 callers will only want a very basic result and this can become a
16760 Note that stack[0] is unused except as a default error return. */
16763 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
16765 struct objfile
*objfile
= cu
->objfile
;
16767 size_t size
= blk
->size
;
16768 gdb_byte
*data
= blk
->data
;
16769 CORE_ADDR stack
[64];
16771 unsigned int bytes_read
, unsnd
;
16777 stack
[++stacki
] = 0;
16816 stack
[++stacki
] = op
- DW_OP_lit0
;
16851 stack
[++stacki
] = op
- DW_OP_reg0
;
16853 dwarf2_complex_location_expr_complaint ();
16857 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
16859 stack
[++stacki
] = unsnd
;
16861 dwarf2_complex_location_expr_complaint ();
16865 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
16870 case DW_OP_const1u
:
16871 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
16875 case DW_OP_const1s
:
16876 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
16880 case DW_OP_const2u
:
16881 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
16885 case DW_OP_const2s
:
16886 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
16890 case DW_OP_const4u
:
16891 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
16895 case DW_OP_const4s
:
16896 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
16900 case DW_OP_const8u
:
16901 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
16906 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
16912 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
16917 stack
[stacki
+ 1] = stack
[stacki
];
16922 stack
[stacki
- 1] += stack
[stacki
];
16926 case DW_OP_plus_uconst
:
16927 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
16933 stack
[stacki
- 1] -= stack
[stacki
];
16938 /* If we're not the last op, then we definitely can't encode
16939 this using GDB's address_class enum. This is valid for partial
16940 global symbols, although the variable's address will be bogus
16943 dwarf2_complex_location_expr_complaint ();
16946 case DW_OP_GNU_push_tls_address
:
16947 /* The top of the stack has the offset from the beginning
16948 of the thread control block at which the variable is located. */
16949 /* Nothing should follow this operator, so the top of stack would
16951 /* This is valid for partial global symbols, but the variable's
16952 address will be bogus in the psymtab. Make it always at least
16953 non-zero to not look as a variable garbage collected by linker
16954 which have DW_OP_addr 0. */
16956 dwarf2_complex_location_expr_complaint ();
16960 case DW_OP_GNU_uninit
:
16963 case DW_OP_GNU_addr_index
:
16964 case DW_OP_GNU_const_index
:
16965 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
16972 const char *name
= get_DW_OP_name (op
);
16975 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
16978 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
16982 return (stack
[stacki
]);
16985 /* Enforce maximum stack depth of SIZE-1 to avoid writing
16986 outside of the allocated space. Also enforce minimum>0. */
16987 if (stacki
>= ARRAY_SIZE (stack
) - 1)
16989 complaint (&symfile_complaints
,
16990 _("location description stack overflow"));
16996 complaint (&symfile_complaints
,
16997 _("location description stack underflow"));
17001 return (stack
[stacki
]);
17004 /* memory allocation interface */
17006 static struct dwarf_block
*
17007 dwarf_alloc_block (struct dwarf2_cu
*cu
)
17009 struct dwarf_block
*blk
;
17011 blk
= (struct dwarf_block
*)
17012 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
17016 static struct die_info
*
17017 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
17019 struct die_info
*die
;
17020 size_t size
= sizeof (struct die_info
);
17023 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
17025 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
17026 memset (die
, 0, sizeof (struct die_info
));
17031 /* Macro support. */
17033 /* Return the full name of file number I in *LH's file name table.
17034 Use COMP_DIR as the name of the current directory of the
17035 compilation. The result is allocated using xmalloc; the caller is
17036 responsible for freeing it. */
17038 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
17040 /* Is the file number a valid index into the line header's file name
17041 table? Remember that file numbers start with one, not zero. */
17042 if (1 <= file
&& file
<= lh
->num_file_names
)
17044 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
17046 if (IS_ABSOLUTE_PATH (fe
->name
))
17047 return xstrdup (fe
->name
);
17055 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
17061 dir_len
= strlen (dir
);
17062 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
17063 strcpy (full_name
, dir
);
17064 full_name
[dir_len
] = '/';
17065 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
17069 return xstrdup (fe
->name
);
17074 /* The compiler produced a bogus file number. We can at least
17075 record the macro definitions made in the file, even if we
17076 won't be able to find the file by name. */
17077 char fake_name
[80];
17079 sprintf (fake_name
, "<bad macro file number %d>", file
);
17081 complaint (&symfile_complaints
,
17082 _("bad file number in macro information (%d)"),
17085 return xstrdup (fake_name
);
17090 static struct macro_source_file
*
17091 macro_start_file (int file
, int line
,
17092 struct macro_source_file
*current_file
,
17093 const char *comp_dir
,
17094 struct line_header
*lh
, struct objfile
*objfile
)
17096 /* The full name of this source file. */
17097 char *full_name
= file_full_name (file
, lh
, comp_dir
);
17099 /* We don't create a macro table for this compilation unit
17100 at all until we actually get a filename. */
17101 if (! pending_macros
)
17102 pending_macros
= new_macro_table (&objfile
->per_bfd
->storage_obstack
,
17103 objfile
->per_bfd
->macro_cache
);
17105 if (! current_file
)
17107 /* If we have no current file, then this must be the start_file
17108 directive for the compilation unit's main source file. */
17109 current_file
= macro_set_main (pending_macros
, full_name
);
17110 macro_define_special (pending_macros
);
17113 current_file
= macro_include (current_file
, line
, full_name
);
17117 return current_file
;
17121 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
17122 followed by a null byte. */
17124 copy_string (const char *buf
, int len
)
17126 char *s
= xmalloc (len
+ 1);
17128 memcpy (s
, buf
, len
);
17134 static const char *
17135 consume_improper_spaces (const char *p
, const char *body
)
17139 complaint (&symfile_complaints
,
17140 _("macro definition contains spaces "
17141 "in formal argument list:\n`%s'"),
17153 parse_macro_definition (struct macro_source_file
*file
, int line
,
17158 /* The body string takes one of two forms. For object-like macro
17159 definitions, it should be:
17161 <macro name> " " <definition>
17163 For function-like macro definitions, it should be:
17165 <macro name> "() " <definition>
17167 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
17169 Spaces may appear only where explicitly indicated, and in the
17172 The Dwarf 2 spec says that an object-like macro's name is always
17173 followed by a space, but versions of GCC around March 2002 omit
17174 the space when the macro's definition is the empty string.
17176 The Dwarf 2 spec says that there should be no spaces between the
17177 formal arguments in a function-like macro's formal argument list,
17178 but versions of GCC around March 2002 include spaces after the
17182 /* Find the extent of the macro name. The macro name is terminated
17183 by either a space or null character (for an object-like macro) or
17184 an opening paren (for a function-like macro). */
17185 for (p
= body
; *p
; p
++)
17186 if (*p
== ' ' || *p
== '(')
17189 if (*p
== ' ' || *p
== '\0')
17191 /* It's an object-like macro. */
17192 int name_len
= p
- body
;
17193 char *name
= copy_string (body
, name_len
);
17194 const char *replacement
;
17197 replacement
= body
+ name_len
+ 1;
17200 dwarf2_macro_malformed_definition_complaint (body
);
17201 replacement
= body
+ name_len
;
17204 macro_define_object (file
, line
, name
, replacement
);
17208 else if (*p
== '(')
17210 /* It's a function-like macro. */
17211 char *name
= copy_string (body
, p
- body
);
17214 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
17218 p
= consume_improper_spaces (p
, body
);
17220 /* Parse the formal argument list. */
17221 while (*p
&& *p
!= ')')
17223 /* Find the extent of the current argument name. */
17224 const char *arg_start
= p
;
17226 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
17229 if (! *p
|| p
== arg_start
)
17230 dwarf2_macro_malformed_definition_complaint (body
);
17233 /* Make sure argv has room for the new argument. */
17234 if (argc
>= argv_size
)
17237 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
17240 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
17243 p
= consume_improper_spaces (p
, body
);
17245 /* Consume the comma, if present. */
17250 p
= consume_improper_spaces (p
, body
);
17259 /* Perfectly formed definition, no complaints. */
17260 macro_define_function (file
, line
, name
,
17261 argc
, (const char **) argv
,
17263 else if (*p
== '\0')
17265 /* Complain, but do define it. */
17266 dwarf2_macro_malformed_definition_complaint (body
);
17267 macro_define_function (file
, line
, name
,
17268 argc
, (const char **) argv
,
17272 /* Just complain. */
17273 dwarf2_macro_malformed_definition_complaint (body
);
17276 /* Just complain. */
17277 dwarf2_macro_malformed_definition_complaint (body
);
17283 for (i
= 0; i
< argc
; i
++)
17289 dwarf2_macro_malformed_definition_complaint (body
);
17292 /* Skip some bytes from BYTES according to the form given in FORM.
17293 Returns the new pointer. */
17296 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
, gdb_byte
*buffer_end
,
17297 enum dwarf_form form
,
17298 unsigned int offset_size
,
17299 struct dwarf2_section_info
*section
)
17301 unsigned int bytes_read
;
17305 case DW_FORM_data1
:
17310 case DW_FORM_data2
:
17314 case DW_FORM_data4
:
17318 case DW_FORM_data8
:
17322 case DW_FORM_string
:
17323 read_direct_string (abfd
, bytes
, &bytes_read
);
17324 bytes
+= bytes_read
;
17327 case DW_FORM_sec_offset
:
17329 case DW_FORM_GNU_strp_alt
:
17330 bytes
+= offset_size
;
17333 case DW_FORM_block
:
17334 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
17335 bytes
+= bytes_read
;
17338 case DW_FORM_block1
:
17339 bytes
+= 1 + read_1_byte (abfd
, bytes
);
17341 case DW_FORM_block2
:
17342 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
17344 case DW_FORM_block4
:
17345 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
17348 case DW_FORM_sdata
:
17349 case DW_FORM_udata
:
17350 case DW_FORM_GNU_addr_index
:
17351 case DW_FORM_GNU_str_index
:
17352 bytes
= (gdb_byte
*) gdb_skip_leb128 (bytes
, buffer_end
);
17355 dwarf2_section_buffer_overflow_complaint (section
);
17363 complaint (&symfile_complaints
,
17364 _("invalid form 0x%x in `%s'"),
17366 section
->asection
->name
);
17374 /* A helper for dwarf_decode_macros that handles skipping an unknown
17375 opcode. Returns an updated pointer to the macro data buffer; or,
17376 on error, issues a complaint and returns NULL. */
17379 skip_unknown_opcode (unsigned int opcode
,
17380 gdb_byte
**opcode_definitions
,
17381 gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
17383 unsigned int offset_size
,
17384 struct dwarf2_section_info
*section
)
17386 unsigned int bytes_read
, i
;
17390 if (opcode_definitions
[opcode
] == NULL
)
17392 complaint (&symfile_complaints
,
17393 _("unrecognized DW_MACFINO opcode 0x%x"),
17398 defn
= opcode_definitions
[opcode
];
17399 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
17400 defn
+= bytes_read
;
17402 for (i
= 0; i
< arg
; ++i
)
17404 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
, defn
[i
], offset_size
,
17406 if (mac_ptr
== NULL
)
17408 /* skip_form_bytes already issued the complaint. */
17416 /* A helper function which parses the header of a macro section.
17417 If the macro section is the extended (for now called "GNU") type,
17418 then this updates *OFFSET_SIZE. Returns a pointer to just after
17419 the header, or issues a complaint and returns NULL on error. */
17422 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
17425 unsigned int *offset_size
,
17426 int section_is_gnu
)
17428 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
17430 if (section_is_gnu
)
17432 unsigned int version
, flags
;
17434 version
= read_2_bytes (abfd
, mac_ptr
);
17437 complaint (&symfile_complaints
,
17438 _("unrecognized version `%d' in .debug_macro section"),
17444 flags
= read_1_byte (abfd
, mac_ptr
);
17446 *offset_size
= (flags
& 1) ? 8 : 4;
17448 if ((flags
& 2) != 0)
17449 /* We don't need the line table offset. */
17450 mac_ptr
+= *offset_size
;
17452 /* Vendor opcode descriptions. */
17453 if ((flags
& 4) != 0)
17455 unsigned int i
, count
;
17457 count
= read_1_byte (abfd
, mac_ptr
);
17459 for (i
= 0; i
< count
; ++i
)
17461 unsigned int opcode
, bytes_read
;
17464 opcode
= read_1_byte (abfd
, mac_ptr
);
17466 opcode_definitions
[opcode
] = mac_ptr
;
17467 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17468 mac_ptr
+= bytes_read
;
17477 /* A helper for dwarf_decode_macros that handles the GNU extensions,
17478 including DW_MACRO_GNU_transparent_include. */
17481 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
17482 struct macro_source_file
*current_file
,
17483 struct line_header
*lh
, char *comp_dir
,
17484 struct dwarf2_section_info
*section
,
17485 int section_is_gnu
, int section_is_dwz
,
17486 unsigned int offset_size
,
17487 struct objfile
*objfile
,
17488 htab_t include_hash
)
17490 enum dwarf_macro_record_type macinfo_type
;
17491 int at_commandline
;
17492 gdb_byte
*opcode_definitions
[256];
17494 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
17495 &offset_size
, section_is_gnu
);
17496 if (mac_ptr
== NULL
)
17498 /* We already issued a complaint. */
17502 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
17503 GDB is still reading the definitions from command line. First
17504 DW_MACINFO_start_file will need to be ignored as it was already executed
17505 to create CURRENT_FILE for the main source holding also the command line
17506 definitions. On first met DW_MACINFO_start_file this flag is reset to
17507 normally execute all the remaining DW_MACINFO_start_file macinfos. */
17509 at_commandline
= 1;
17513 /* Do we at least have room for a macinfo type byte? */
17514 if (mac_ptr
>= mac_end
)
17516 dwarf2_section_buffer_overflow_complaint (section
);
17520 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
17523 /* Note that we rely on the fact that the corresponding GNU and
17524 DWARF constants are the same. */
17525 switch (macinfo_type
)
17527 /* A zero macinfo type indicates the end of the macro
17532 case DW_MACRO_GNU_define
:
17533 case DW_MACRO_GNU_undef
:
17534 case DW_MACRO_GNU_define_indirect
:
17535 case DW_MACRO_GNU_undef_indirect
:
17536 case DW_MACRO_GNU_define_indirect_alt
:
17537 case DW_MACRO_GNU_undef_indirect_alt
:
17539 unsigned int bytes_read
;
17544 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17545 mac_ptr
+= bytes_read
;
17547 if (macinfo_type
== DW_MACRO_GNU_define
17548 || macinfo_type
== DW_MACRO_GNU_undef
)
17550 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17551 mac_ptr
+= bytes_read
;
17555 LONGEST str_offset
;
17557 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
17558 mac_ptr
+= offset_size
;
17560 if (macinfo_type
== DW_MACRO_GNU_define_indirect_alt
17561 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
17564 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17566 body
= read_indirect_string_from_dwz (dwz
, str_offset
);
17569 body
= read_indirect_string_at_offset (abfd
, str_offset
);
17572 is_define
= (macinfo_type
== DW_MACRO_GNU_define
17573 || macinfo_type
== DW_MACRO_GNU_define_indirect
17574 || macinfo_type
== DW_MACRO_GNU_define_indirect_alt
);
17575 if (! current_file
)
17577 /* DWARF violation as no main source is present. */
17578 complaint (&symfile_complaints
,
17579 _("debug info with no main source gives macro %s "
17581 is_define
? _("definition") : _("undefinition"),
17585 if ((line
== 0 && !at_commandline
)
17586 || (line
!= 0 && at_commandline
))
17587 complaint (&symfile_complaints
,
17588 _("debug info gives %s macro %s with %s line %d: %s"),
17589 at_commandline
? _("command-line") : _("in-file"),
17590 is_define
? _("definition") : _("undefinition"),
17591 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
17594 parse_macro_definition (current_file
, line
, body
);
17597 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
17598 || macinfo_type
== DW_MACRO_GNU_undef_indirect
17599 || macinfo_type
== DW_MACRO_GNU_undef_indirect_alt
);
17600 macro_undef (current_file
, line
, body
);
17605 case DW_MACRO_GNU_start_file
:
17607 unsigned int bytes_read
;
17610 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17611 mac_ptr
+= bytes_read
;
17612 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17613 mac_ptr
+= bytes_read
;
17615 if ((line
== 0 && !at_commandline
)
17616 || (line
!= 0 && at_commandline
))
17617 complaint (&symfile_complaints
,
17618 _("debug info gives source %d included "
17619 "from %s at %s line %d"),
17620 file
, at_commandline
? _("command-line") : _("file"),
17621 line
== 0 ? _("zero") : _("non-zero"), line
);
17623 if (at_commandline
)
17625 /* This DW_MACRO_GNU_start_file was executed in the
17627 at_commandline
= 0;
17630 current_file
= macro_start_file (file
, line
,
17631 current_file
, comp_dir
,
17636 case DW_MACRO_GNU_end_file
:
17637 if (! current_file
)
17638 complaint (&symfile_complaints
,
17639 _("macro debug info has an unmatched "
17640 "`close_file' directive"));
17643 current_file
= current_file
->included_by
;
17644 if (! current_file
)
17646 enum dwarf_macro_record_type next_type
;
17648 /* GCC circa March 2002 doesn't produce the zero
17649 type byte marking the end of the compilation
17650 unit. Complain if it's not there, but exit no
17653 /* Do we at least have room for a macinfo type byte? */
17654 if (mac_ptr
>= mac_end
)
17656 dwarf2_section_buffer_overflow_complaint (section
);
17660 /* We don't increment mac_ptr here, so this is just
17662 next_type
= read_1_byte (abfd
, mac_ptr
);
17663 if (next_type
!= 0)
17664 complaint (&symfile_complaints
,
17665 _("no terminating 0-type entry for "
17666 "macros in `.debug_macinfo' section"));
17673 case DW_MACRO_GNU_transparent_include
:
17674 case DW_MACRO_GNU_transparent_include_alt
:
17678 bfd
*include_bfd
= abfd
;
17679 struct dwarf2_section_info
*include_section
= section
;
17680 struct dwarf2_section_info alt_section
;
17681 gdb_byte
*include_mac_end
= mac_end
;
17682 int is_dwz
= section_is_dwz
;
17683 gdb_byte
*new_mac_ptr
;
17685 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
17686 mac_ptr
+= offset_size
;
17688 if (macinfo_type
== DW_MACRO_GNU_transparent_include_alt
)
17690 struct dwz_file
*dwz
= dwarf2_get_dwz_file ();
17692 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
17695 include_bfd
= dwz
->macro
.asection
->owner
;
17696 include_section
= &dwz
->macro
;
17697 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
17701 new_mac_ptr
= include_section
->buffer
+ offset
;
17702 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
17706 /* This has actually happened; see
17707 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
17708 complaint (&symfile_complaints
,
17709 _("recursive DW_MACRO_GNU_transparent_include in "
17710 ".debug_macro section"));
17714 *slot
= new_mac_ptr
;
17716 dwarf_decode_macro_bytes (include_bfd
, new_mac_ptr
,
17717 include_mac_end
, current_file
,
17719 section
, section_is_gnu
, is_dwz
,
17720 offset_size
, objfile
, include_hash
);
17722 htab_remove_elt (include_hash
, new_mac_ptr
);
17727 case DW_MACINFO_vendor_ext
:
17728 if (!section_is_gnu
)
17730 unsigned int bytes_read
;
17733 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17734 mac_ptr
+= bytes_read
;
17735 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17736 mac_ptr
+= bytes_read
;
17738 /* We don't recognize any vendor extensions. */
17744 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
17745 mac_ptr
, mac_end
, abfd
, offset_size
,
17747 if (mac_ptr
== NULL
)
17751 } while (macinfo_type
!= 0);
17755 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
17756 char *comp_dir
, int section_is_gnu
)
17758 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17759 struct line_header
*lh
= cu
->line_header
;
17761 gdb_byte
*mac_ptr
, *mac_end
;
17762 struct macro_source_file
*current_file
= 0;
17763 enum dwarf_macro_record_type macinfo_type
;
17764 unsigned int offset_size
= cu
->header
.offset_size
;
17765 gdb_byte
*opcode_definitions
[256];
17766 struct cleanup
*cleanup
;
17767 htab_t include_hash
;
17769 struct dwarf2_section_info
*section
;
17770 const char *section_name
;
17772 if (cu
->dwo_unit
!= NULL
)
17774 if (section_is_gnu
)
17776 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
17777 section_name
= ".debug_macro.dwo";
17781 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
17782 section_name
= ".debug_macinfo.dwo";
17787 if (section_is_gnu
)
17789 section
= &dwarf2_per_objfile
->macro
;
17790 section_name
= ".debug_macro";
17794 section
= &dwarf2_per_objfile
->macinfo
;
17795 section_name
= ".debug_macinfo";
17799 dwarf2_read_section (objfile
, section
);
17800 if (section
->buffer
== NULL
)
17802 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
17805 abfd
= section
->asection
->owner
;
17807 /* First pass: Find the name of the base filename.
17808 This filename is needed in order to process all macros whose definition
17809 (or undefinition) comes from the command line. These macros are defined
17810 before the first DW_MACINFO_start_file entry, and yet still need to be
17811 associated to the base file.
17813 To determine the base file name, we scan the macro definitions until we
17814 reach the first DW_MACINFO_start_file entry. We then initialize
17815 CURRENT_FILE accordingly so that any macro definition found before the
17816 first DW_MACINFO_start_file can still be associated to the base file. */
17818 mac_ptr
= section
->buffer
+ offset
;
17819 mac_end
= section
->buffer
+ section
->size
;
17821 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
17822 &offset_size
, section_is_gnu
);
17823 if (mac_ptr
== NULL
)
17825 /* We already issued a complaint. */
17831 /* Do we at least have room for a macinfo type byte? */
17832 if (mac_ptr
>= mac_end
)
17834 /* Complaint is printed during the second pass as GDB will probably
17835 stop the first pass earlier upon finding
17836 DW_MACINFO_start_file. */
17840 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
17843 /* Note that we rely on the fact that the corresponding GNU and
17844 DWARF constants are the same. */
17845 switch (macinfo_type
)
17847 /* A zero macinfo type indicates the end of the macro
17852 case DW_MACRO_GNU_define
:
17853 case DW_MACRO_GNU_undef
:
17854 /* Only skip the data by MAC_PTR. */
17856 unsigned int bytes_read
;
17858 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17859 mac_ptr
+= bytes_read
;
17860 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17861 mac_ptr
+= bytes_read
;
17865 case DW_MACRO_GNU_start_file
:
17867 unsigned int bytes_read
;
17870 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17871 mac_ptr
+= bytes_read
;
17872 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17873 mac_ptr
+= bytes_read
;
17875 current_file
= macro_start_file (file
, line
, current_file
,
17876 comp_dir
, lh
, objfile
);
17880 case DW_MACRO_GNU_end_file
:
17881 /* No data to skip by MAC_PTR. */
17884 case DW_MACRO_GNU_define_indirect
:
17885 case DW_MACRO_GNU_undef_indirect
:
17886 case DW_MACRO_GNU_define_indirect_alt
:
17887 case DW_MACRO_GNU_undef_indirect_alt
:
17889 unsigned int bytes_read
;
17891 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17892 mac_ptr
+= bytes_read
;
17893 mac_ptr
+= offset_size
;
17897 case DW_MACRO_GNU_transparent_include
:
17898 case DW_MACRO_GNU_transparent_include_alt
:
17899 /* Note that, according to the spec, a transparent include
17900 chain cannot call DW_MACRO_GNU_start_file. So, we can just
17901 skip this opcode. */
17902 mac_ptr
+= offset_size
;
17905 case DW_MACINFO_vendor_ext
:
17906 /* Only skip the data by MAC_PTR. */
17907 if (!section_is_gnu
)
17909 unsigned int bytes_read
;
17911 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
17912 mac_ptr
+= bytes_read
;
17913 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
17914 mac_ptr
+= bytes_read
;
17919 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
17920 mac_ptr
, mac_end
, abfd
, offset_size
,
17922 if (mac_ptr
== NULL
)
17926 } while (macinfo_type
!= 0 && current_file
== NULL
);
17928 /* Second pass: Process all entries.
17930 Use the AT_COMMAND_LINE flag to determine whether we are still processing
17931 command-line macro definitions/undefinitions. This flag is unset when we
17932 reach the first DW_MACINFO_start_file entry. */
17934 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
17935 NULL
, xcalloc
, xfree
);
17936 cleanup
= make_cleanup_htab_delete (include_hash
);
17937 mac_ptr
= section
->buffer
+ offset
;
17938 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
17940 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
17941 current_file
, lh
, comp_dir
, section
,
17943 offset_size
, objfile
, include_hash
);
17944 do_cleanups (cleanup
);
17947 /* Check if the attribute's form is a DW_FORM_block*
17948 if so return true else false. */
17951 attr_form_is_block (struct attribute
*attr
)
17953 return (attr
== NULL
? 0 :
17954 attr
->form
== DW_FORM_block1
17955 || attr
->form
== DW_FORM_block2
17956 || attr
->form
== DW_FORM_block4
17957 || attr
->form
== DW_FORM_block
17958 || attr
->form
== DW_FORM_exprloc
);
17961 /* Return non-zero if ATTR's value is a section offset --- classes
17962 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
17963 You may use DW_UNSND (attr) to retrieve such offsets.
17965 Section 7.5.4, "Attribute Encodings", explains that no attribute
17966 may have a value that belongs to more than one of these classes; it
17967 would be ambiguous if we did, because we use the same forms for all
17971 attr_form_is_section_offset (struct attribute
*attr
)
17973 return (attr
->form
== DW_FORM_data4
17974 || attr
->form
== DW_FORM_data8
17975 || attr
->form
== DW_FORM_sec_offset
);
17978 /* Return non-zero if ATTR's value falls in the 'constant' class, or
17979 zero otherwise. When this function returns true, you can apply
17980 dwarf2_get_attr_constant_value to it.
17982 However, note that for some attributes you must check
17983 attr_form_is_section_offset before using this test. DW_FORM_data4
17984 and DW_FORM_data8 are members of both the constant class, and of
17985 the classes that contain offsets into other debug sections
17986 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
17987 that, if an attribute's can be either a constant or one of the
17988 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
17989 taken as section offsets, not constants. */
17992 attr_form_is_constant (struct attribute
*attr
)
17994 switch (attr
->form
)
17996 case DW_FORM_sdata
:
17997 case DW_FORM_udata
:
17998 case DW_FORM_data1
:
17999 case DW_FORM_data2
:
18000 case DW_FORM_data4
:
18001 case DW_FORM_data8
:
18008 /* Return the .debug_loc section to use for CU.
18009 For DWO files use .debug_loc.dwo. */
18011 static struct dwarf2_section_info
*
18012 cu_debug_loc_section (struct dwarf2_cu
*cu
)
18015 return &cu
->dwo_unit
->dwo_file
->sections
.loc
;
18016 return &dwarf2_per_objfile
->loc
;
18019 /* A helper function that fills in a dwarf2_loclist_baton. */
18022 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
18023 struct dwarf2_loclist_baton
*baton
,
18024 struct attribute
*attr
)
18026 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18028 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
18030 baton
->per_cu
= cu
->per_cu
;
18031 gdb_assert (baton
->per_cu
);
18032 /* We don't know how long the location list is, but make sure we
18033 don't run off the edge of the section. */
18034 baton
->size
= section
->size
- DW_UNSND (attr
);
18035 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
18036 baton
->base_address
= cu
->base_address
;
18037 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
18041 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
18042 struct dwarf2_cu
*cu
)
18044 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18045 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18047 if (attr_form_is_section_offset (attr
)
18048 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
18049 the section. If so, fall through to the complaint in the
18051 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
18053 struct dwarf2_loclist_baton
*baton
;
18055 baton
= obstack_alloc (&objfile
->objfile_obstack
,
18056 sizeof (struct dwarf2_loclist_baton
));
18058 fill_in_loclist_baton (cu
, baton
, attr
);
18060 if (cu
->base_known
== 0)
18061 complaint (&symfile_complaints
,
18062 _("Location list used without "
18063 "specifying the CU base address."));
18065 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
18066 SYMBOL_LOCATION_BATON (sym
) = baton
;
18070 struct dwarf2_locexpr_baton
*baton
;
18072 baton
= obstack_alloc (&objfile
->objfile_obstack
,
18073 sizeof (struct dwarf2_locexpr_baton
));
18074 baton
->per_cu
= cu
->per_cu
;
18075 gdb_assert (baton
->per_cu
);
18077 if (attr_form_is_block (attr
))
18079 /* Note that we're just copying the block's data pointer
18080 here, not the actual data. We're still pointing into the
18081 info_buffer for SYM's objfile; right now we never release
18082 that buffer, but when we do clean up properly this may
18084 baton
->size
= DW_BLOCK (attr
)->size
;
18085 baton
->data
= DW_BLOCK (attr
)->data
;
18089 dwarf2_invalid_attrib_class_complaint ("location description",
18090 SYMBOL_NATURAL_NAME (sym
));
18094 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
18095 SYMBOL_LOCATION_BATON (sym
) = baton
;
18099 /* Return the OBJFILE associated with the compilation unit CU. If CU
18100 came from a separate debuginfo file, then the master objfile is
18104 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
18106 struct objfile
*objfile
= per_cu
->objfile
;
18108 /* Return the master objfile, so that we can report and look up the
18109 correct file containing this variable. */
18110 if (objfile
->separate_debug_objfile_backlink
)
18111 objfile
= objfile
->separate_debug_objfile_backlink
;
18116 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
18117 (CU_HEADERP is unused in such case) or prepare a temporary copy at
18118 CU_HEADERP first. */
18120 static const struct comp_unit_head
*
18121 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
18122 struct dwarf2_per_cu_data
*per_cu
)
18124 gdb_byte
*info_ptr
;
18127 return &per_cu
->cu
->header
;
18129 info_ptr
= per_cu
->info_or_types_section
->buffer
+ per_cu
->offset
.sect_off
;
18131 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
18132 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->objfile
->obfd
);
18137 /* Return the address size given in the compilation unit header for CU. */
18140 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
18142 struct comp_unit_head cu_header_local
;
18143 const struct comp_unit_head
*cu_headerp
;
18145 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
18147 return cu_headerp
->addr_size
;
18150 /* Return the offset size given in the compilation unit header for CU. */
18153 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
18155 struct comp_unit_head cu_header_local
;
18156 const struct comp_unit_head
*cu_headerp
;
18158 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
18160 return cu_headerp
->offset_size
;
18163 /* See its dwarf2loc.h declaration. */
18166 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
18168 struct comp_unit_head cu_header_local
;
18169 const struct comp_unit_head
*cu_headerp
;
18171 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
18173 if (cu_headerp
->version
== 2)
18174 return cu_headerp
->addr_size
;
18176 return cu_headerp
->offset_size
;
18179 /* Return the text offset of the CU. The returned offset comes from
18180 this CU's objfile. If this objfile came from a separate debuginfo
18181 file, then the offset may be different from the corresponding
18182 offset in the parent objfile. */
18185 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
18187 struct objfile
*objfile
= per_cu
->objfile
;
18189 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
18192 /* Locate the .debug_info compilation unit from CU's objfile which contains
18193 the DIE at OFFSET. Raises an error on failure. */
18195 static struct dwarf2_per_cu_data
*
18196 dwarf2_find_containing_comp_unit (sect_offset offset
,
18197 unsigned int offset_in_dwz
,
18198 struct objfile
*objfile
)
18200 struct dwarf2_per_cu_data
*this_cu
;
18202 const sect_offset
*cu_off
;
18205 high
= dwarf2_per_objfile
->n_comp_units
- 1;
18208 struct dwarf2_per_cu_data
*mid_cu
;
18209 int mid
= low
+ (high
- low
) / 2;
18211 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
18212 cu_off
= &mid_cu
->offset
;
18213 if (mid_cu
->is_dwz
> offset_in_dwz
18214 || (mid_cu
->is_dwz
== offset_in_dwz
18215 && cu_off
->sect_off
>= offset
.sect_off
))
18220 gdb_assert (low
== high
);
18221 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
18222 cu_off
= &this_cu
->offset
;
18223 if (this_cu
->is_dwz
!= offset_in_dwz
|| cu_off
->sect_off
> offset
.sect_off
)
18225 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
18226 error (_("Dwarf Error: could not find partial DIE containing "
18227 "offset 0x%lx [in module %s]"),
18228 (long) offset
.sect_off
, bfd_get_filename (objfile
->obfd
));
18230 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
.sect_off
18231 <= offset
.sect_off
);
18232 return dwarf2_per_objfile
->all_comp_units
[low
-1];
18236 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
18237 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
18238 && offset
.sect_off
>= this_cu
->offset
.sect_off
+ this_cu
->length
)
18239 error (_("invalid dwarf2 offset %u"), offset
.sect_off
);
18240 gdb_assert (offset
.sect_off
< this_cu
->offset
.sect_off
+ this_cu
->length
);
18245 /* Initialize dwarf2_cu CU, owned by PER_CU. */
18248 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
18250 memset (cu
, 0, sizeof (*cu
));
18252 cu
->per_cu
= per_cu
;
18253 cu
->objfile
= per_cu
->objfile
;
18254 obstack_init (&cu
->comp_unit_obstack
);
18257 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
18260 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
18261 enum language pretend_language
)
18263 struct attribute
*attr
;
18265 /* Set the language we're debugging. */
18266 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
18268 set_cu_language (DW_UNSND (attr
), cu
);
18271 cu
->language
= pretend_language
;
18272 cu
->language_defn
= language_def (cu
->language
);
18275 attr
= dwarf2_attr (comp_unit_die
, DW_AT_producer
, cu
);
18277 cu
->producer
= DW_STRING (attr
);
18280 /* Release one cached compilation unit, CU. We unlink it from the tree
18281 of compilation units, but we don't remove it from the read_in_chain;
18282 the caller is responsible for that.
18283 NOTE: DATA is a void * because this function is also used as a
18284 cleanup routine. */
18287 free_heap_comp_unit (void *data
)
18289 struct dwarf2_cu
*cu
= data
;
18291 gdb_assert (cu
->per_cu
!= NULL
);
18292 cu
->per_cu
->cu
= NULL
;
18295 obstack_free (&cu
->comp_unit_obstack
, NULL
);
18300 /* This cleanup function is passed the address of a dwarf2_cu on the stack
18301 when we're finished with it. We can't free the pointer itself, but be
18302 sure to unlink it from the cache. Also release any associated storage. */
18305 free_stack_comp_unit (void *data
)
18307 struct dwarf2_cu
*cu
= data
;
18309 gdb_assert (cu
->per_cu
!= NULL
);
18310 cu
->per_cu
->cu
= NULL
;
18313 obstack_free (&cu
->comp_unit_obstack
, NULL
);
18314 cu
->partial_dies
= NULL
;
18317 /* Free all cached compilation units. */
18320 free_cached_comp_units (void *data
)
18322 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
18324 per_cu
= dwarf2_per_objfile
->read_in_chain
;
18325 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
18326 while (per_cu
!= NULL
)
18328 struct dwarf2_per_cu_data
*next_cu
;
18330 next_cu
= per_cu
->cu
->read_in_chain
;
18332 free_heap_comp_unit (per_cu
->cu
);
18333 *last_chain
= next_cu
;
18339 /* Increase the age counter on each cached compilation unit, and free
18340 any that are too old. */
18343 age_cached_comp_units (void)
18345 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
18347 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
18348 per_cu
= dwarf2_per_objfile
->read_in_chain
;
18349 while (per_cu
!= NULL
)
18351 per_cu
->cu
->last_used
++;
18352 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
18353 dwarf2_mark (per_cu
->cu
);
18354 per_cu
= per_cu
->cu
->read_in_chain
;
18357 per_cu
= dwarf2_per_objfile
->read_in_chain
;
18358 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
18359 while (per_cu
!= NULL
)
18361 struct dwarf2_per_cu_data
*next_cu
;
18363 next_cu
= per_cu
->cu
->read_in_chain
;
18365 if (!per_cu
->cu
->mark
)
18367 free_heap_comp_unit (per_cu
->cu
);
18368 *last_chain
= next_cu
;
18371 last_chain
= &per_cu
->cu
->read_in_chain
;
18377 /* Remove a single compilation unit from the cache. */
18380 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
18382 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
18384 per_cu
= dwarf2_per_objfile
->read_in_chain
;
18385 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
18386 while (per_cu
!= NULL
)
18388 struct dwarf2_per_cu_data
*next_cu
;
18390 next_cu
= per_cu
->cu
->read_in_chain
;
18392 if (per_cu
== target_per_cu
)
18394 free_heap_comp_unit (per_cu
->cu
);
18396 *last_chain
= next_cu
;
18400 last_chain
= &per_cu
->cu
->read_in_chain
;
18406 /* Release all extra memory associated with OBJFILE. */
18409 dwarf2_free_objfile (struct objfile
*objfile
)
18411 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
18413 if (dwarf2_per_objfile
== NULL
)
18416 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
18417 free_cached_comp_units (NULL
);
18419 if (dwarf2_per_objfile
->quick_file_names_table
)
18420 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
18422 /* Everything else should be on the objfile obstack. */
18425 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
18426 We store these in a hash table separate from the DIEs, and preserve them
18427 when the DIEs are flushed out of cache.
18429 The CU "per_cu" pointer is needed because offset alone is not enough to
18430 uniquely identify the type. A file may have multiple .debug_types sections,
18431 or the type may come from a DWO file. We have to use something in
18432 dwarf2_per_cu_data (or the pointer to it) because we can enter the lookup
18433 routine, get_die_type_at_offset, from outside this file, and thus won't
18434 necessarily have PER_CU->cu. Fortunately, PER_CU is stable for the life
18437 struct dwarf2_per_cu_offset_and_type
18439 const struct dwarf2_per_cu_data
*per_cu
;
18440 sect_offset offset
;
18444 /* Hash function for a dwarf2_per_cu_offset_and_type. */
18447 per_cu_offset_and_type_hash (const void *item
)
18449 const struct dwarf2_per_cu_offset_and_type
*ofs
= item
;
18451 return (uintptr_t) ofs
->per_cu
+ ofs
->offset
.sect_off
;
18454 /* Equality function for a dwarf2_per_cu_offset_and_type. */
18457 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
18459 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
= item_lhs
;
18460 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
= item_rhs
;
18462 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
18463 && ofs_lhs
->offset
.sect_off
== ofs_rhs
->offset
.sect_off
);
18466 /* Set the type associated with DIE to TYPE. Save it in CU's hash
18467 table if necessary. For convenience, return TYPE.
18469 The DIEs reading must have careful ordering to:
18470 * Not cause infite loops trying to read in DIEs as a prerequisite for
18471 reading current DIE.
18472 * Not trying to dereference contents of still incompletely read in types
18473 while reading in other DIEs.
18474 * Enable referencing still incompletely read in types just by a pointer to
18475 the type without accessing its fields.
18477 Therefore caller should follow these rules:
18478 * Try to fetch any prerequisite types we may need to build this DIE type
18479 before building the type and calling set_die_type.
18480 * After building type call set_die_type for current DIE as soon as
18481 possible before fetching more types to complete the current type.
18482 * Make the type as complete as possible before fetching more types. */
18484 static struct type
*
18485 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
18487 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
18488 struct objfile
*objfile
= cu
->objfile
;
18490 /* For Ada types, make sure that the gnat-specific data is always
18491 initialized (if not already set). There are a few types where
18492 we should not be doing so, because the type-specific area is
18493 already used to hold some other piece of info (eg: TYPE_CODE_FLT
18494 where the type-specific area is used to store the floatformat).
18495 But this is not a problem, because the gnat-specific information
18496 is actually not needed for these types. */
18497 if (need_gnat_info (cu
)
18498 && TYPE_CODE (type
) != TYPE_CODE_FUNC
18499 && TYPE_CODE (type
) != TYPE_CODE_FLT
18500 && !HAVE_GNAT_AUX_INFO (type
))
18501 INIT_GNAT_SPECIFIC (type
);
18503 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
18505 dwarf2_per_objfile
->die_type_hash
=
18506 htab_create_alloc_ex (127,
18507 per_cu_offset_and_type_hash
,
18508 per_cu_offset_and_type_eq
,
18510 &objfile
->objfile_obstack
,
18511 hashtab_obstack_allocate
,
18512 dummy_obstack_deallocate
);
18515 ofs
.per_cu
= cu
->per_cu
;
18516 ofs
.offset
= die
->offset
;
18518 slot
= (struct dwarf2_per_cu_offset_and_type
**)
18519 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
18521 complaint (&symfile_complaints
,
18522 _("A problem internal to GDB: DIE 0x%x has type already set"),
18523 die
->offset
.sect_off
);
18524 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
18529 /* Look up the type for the die at OFFSET in the appropriate type_hash
18530 table, or return NULL if the die does not have a saved type. */
18532 static struct type
*
18533 get_die_type_at_offset (sect_offset offset
,
18534 struct dwarf2_per_cu_data
*per_cu
)
18536 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
18538 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
18541 ofs
.per_cu
= per_cu
;
18542 ofs
.offset
= offset
;
18543 slot
= htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
);
18550 /* Look up the type for DIE in the appropriate type_hash table,
18551 or return NULL if DIE does not have a saved type. */
18553 static struct type
*
18554 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18556 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
18559 /* Add a dependence relationship from CU to REF_PER_CU. */
18562 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
18563 struct dwarf2_per_cu_data
*ref_per_cu
)
18567 if (cu
->dependencies
== NULL
)
18569 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
18570 NULL
, &cu
->comp_unit_obstack
,
18571 hashtab_obstack_allocate
,
18572 dummy_obstack_deallocate
);
18574 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
18576 *slot
= ref_per_cu
;
18579 /* Subroutine of dwarf2_mark to pass to htab_traverse.
18580 Set the mark field in every compilation unit in the
18581 cache that we must keep because we are keeping CU. */
18584 dwarf2_mark_helper (void **slot
, void *data
)
18586 struct dwarf2_per_cu_data
*per_cu
;
18588 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
18590 /* cu->dependencies references may not yet have been ever read if QUIT aborts
18591 reading of the chain. As such dependencies remain valid it is not much
18592 useful to track and undo them during QUIT cleanups. */
18593 if (per_cu
->cu
== NULL
)
18596 if (per_cu
->cu
->mark
)
18598 per_cu
->cu
->mark
= 1;
18600 if (per_cu
->cu
->dependencies
!= NULL
)
18601 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
18606 /* Set the mark field in CU and in every other compilation unit in the
18607 cache that we must keep because we are keeping CU. */
18610 dwarf2_mark (struct dwarf2_cu
*cu
)
18615 if (cu
->dependencies
!= NULL
)
18616 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
18620 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
18624 per_cu
->cu
->mark
= 0;
18625 per_cu
= per_cu
->cu
->read_in_chain
;
18629 /* Trivial hash function for partial_die_info: the hash value of a DIE
18630 is its offset in .debug_info for this objfile. */
18633 partial_die_hash (const void *item
)
18635 const struct partial_die_info
*part_die
= item
;
18637 return part_die
->offset
.sect_off
;
18640 /* Trivial comparison function for partial_die_info structures: two DIEs
18641 are equal if they have the same offset. */
18644 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
18646 const struct partial_die_info
*part_die_lhs
= item_lhs
;
18647 const struct partial_die_info
*part_die_rhs
= item_rhs
;
18649 return part_die_lhs
->offset
.sect_off
== part_die_rhs
->offset
.sect_off
;
18652 static struct cmd_list_element
*set_dwarf2_cmdlist
;
18653 static struct cmd_list_element
*show_dwarf2_cmdlist
;
18656 set_dwarf2_cmd (char *args
, int from_tty
)
18658 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
18662 show_dwarf2_cmd (char *args
, int from_tty
)
18664 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
18667 /* Free data associated with OBJFILE, if necessary. */
18670 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
18672 struct dwarf2_per_objfile
*data
= d
;
18675 for (ix
= 0; ix
< dwarf2_per_objfile
->n_comp_units
; ++ix
)
18676 VEC_free (dwarf2_per_cu_ptr
,
18677 dwarf2_per_objfile
->all_comp_units
[ix
]->s
.imported_symtabs
);
18679 VEC_free (dwarf2_section_info_def
, data
->types
);
18681 if (data
->dwo_files
)
18682 free_dwo_files (data
->dwo_files
, objfile
);
18684 if (data
->dwz_file
&& data
->dwz_file
->dwz_bfd
)
18685 gdb_bfd_unref (data
->dwz_file
->dwz_bfd
);
18689 /* The "save gdb-index" command. */
18691 /* The contents of the hash table we create when building the string
18693 struct strtab_entry
18695 offset_type offset
;
18699 /* Hash function for a strtab_entry.
18701 Function is used only during write_hash_table so no index format backward
18702 compatibility is needed. */
18705 hash_strtab_entry (const void *e
)
18707 const struct strtab_entry
*entry
= e
;
18708 return mapped_index_string_hash (INT_MAX
, entry
->str
);
18711 /* Equality function for a strtab_entry. */
18714 eq_strtab_entry (const void *a
, const void *b
)
18716 const struct strtab_entry
*ea
= a
;
18717 const struct strtab_entry
*eb
= b
;
18718 return !strcmp (ea
->str
, eb
->str
);
18721 /* Create a strtab_entry hash table. */
18724 create_strtab (void)
18726 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
18727 xfree
, xcalloc
, xfree
);
18730 /* Add a string to the constant pool. Return the string's offset in
18734 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
18737 struct strtab_entry entry
;
18738 struct strtab_entry
*result
;
18741 slot
= htab_find_slot (table
, &entry
, INSERT
);
18746 result
= XNEW (struct strtab_entry
);
18747 result
->offset
= obstack_object_size (cpool
);
18749 obstack_grow_str0 (cpool
, str
);
18752 return result
->offset
;
18755 /* An entry in the symbol table. */
18756 struct symtab_index_entry
18758 /* The name of the symbol. */
18760 /* The offset of the name in the constant pool. */
18761 offset_type index_offset
;
18762 /* A sorted vector of the indices of all the CUs that hold an object
18764 VEC (offset_type
) *cu_indices
;
18767 /* The symbol table. This is a power-of-2-sized hash table. */
18768 struct mapped_symtab
18770 offset_type n_elements
;
18772 struct symtab_index_entry
**data
;
18775 /* Hash function for a symtab_index_entry. */
18778 hash_symtab_entry (const void *e
)
18780 const struct symtab_index_entry
*entry
= e
;
18781 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
18782 sizeof (offset_type
) * VEC_length (offset_type
,
18783 entry
->cu_indices
),
18787 /* Equality function for a symtab_index_entry. */
18790 eq_symtab_entry (const void *a
, const void *b
)
18792 const struct symtab_index_entry
*ea
= a
;
18793 const struct symtab_index_entry
*eb
= b
;
18794 int len
= VEC_length (offset_type
, ea
->cu_indices
);
18795 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
18797 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
18798 VEC_address (offset_type
, eb
->cu_indices
),
18799 sizeof (offset_type
) * len
);
18802 /* Destroy a symtab_index_entry. */
18805 delete_symtab_entry (void *p
)
18807 struct symtab_index_entry
*entry
= p
;
18808 VEC_free (offset_type
, entry
->cu_indices
);
18812 /* Create a hash table holding symtab_index_entry objects. */
18815 create_symbol_hash_table (void)
18817 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
18818 delete_symtab_entry
, xcalloc
, xfree
);
18821 /* Create a new mapped symtab object. */
18823 static struct mapped_symtab
*
18824 create_mapped_symtab (void)
18826 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
18827 symtab
->n_elements
= 0;
18828 symtab
->size
= 1024;
18829 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
18833 /* Destroy a mapped_symtab. */
18836 cleanup_mapped_symtab (void *p
)
18838 struct mapped_symtab
*symtab
= p
;
18839 /* The contents of the array are freed when the other hash table is
18841 xfree (symtab
->data
);
18845 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
18848 Function is used only during write_hash_table so no index format backward
18849 compatibility is needed. */
18851 static struct symtab_index_entry
**
18852 find_slot (struct mapped_symtab
*symtab
, const char *name
)
18854 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
18856 index
= hash
& (symtab
->size
- 1);
18857 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
18861 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
18862 return &symtab
->data
[index
];
18863 index
= (index
+ step
) & (symtab
->size
- 1);
18867 /* Expand SYMTAB's hash table. */
18870 hash_expand (struct mapped_symtab
*symtab
)
18872 offset_type old_size
= symtab
->size
;
18874 struct symtab_index_entry
**old_entries
= symtab
->data
;
18877 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
18879 for (i
= 0; i
< old_size
; ++i
)
18881 if (old_entries
[i
])
18883 struct symtab_index_entry
**slot
= find_slot (symtab
,
18884 old_entries
[i
]->name
);
18885 *slot
= old_entries
[i
];
18889 xfree (old_entries
);
18892 /* Add an entry to SYMTAB. NAME is the name of the symbol.
18893 CU_INDEX is the index of the CU in which the symbol appears.
18894 IS_STATIC is one if the symbol is static, otherwise zero (global). */
18897 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
18898 int is_static
, gdb_index_symbol_kind kind
,
18899 offset_type cu_index
)
18901 struct symtab_index_entry
**slot
;
18902 offset_type cu_index_and_attrs
;
18904 ++symtab
->n_elements
;
18905 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
18906 hash_expand (symtab
);
18908 slot
= find_slot (symtab
, name
);
18911 *slot
= XNEW (struct symtab_index_entry
);
18912 (*slot
)->name
= name
;
18913 /* index_offset is set later. */
18914 (*slot
)->cu_indices
= NULL
;
18917 cu_index_and_attrs
= 0;
18918 DW2_GDB_INDEX_CU_SET_VALUE (cu_index_and_attrs
, cu_index
);
18919 DW2_GDB_INDEX_SYMBOL_STATIC_SET_VALUE (cu_index_and_attrs
, is_static
);
18920 DW2_GDB_INDEX_SYMBOL_KIND_SET_VALUE (cu_index_and_attrs
, kind
);
18922 /* We don't want to record an index value twice as we want to avoid the
18924 We process all global symbols and then all static symbols
18925 (which would allow us to avoid the duplication by only having to check
18926 the last entry pushed), but a symbol could have multiple kinds in one CU.
18927 To keep things simple we don't worry about the duplication here and
18928 sort and uniqufy the list after we've processed all symbols. */
18929 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index_and_attrs
);
18932 /* qsort helper routine for uniquify_cu_indices. */
18935 offset_type_compare (const void *ap
, const void *bp
)
18937 offset_type a
= *(offset_type
*) ap
;
18938 offset_type b
= *(offset_type
*) bp
;
18940 return (a
> b
) - (b
> a
);
18943 /* Sort and remove duplicates of all symbols' cu_indices lists. */
18946 uniquify_cu_indices (struct mapped_symtab
*symtab
)
18950 for (i
= 0; i
< symtab
->size
; ++i
)
18952 struct symtab_index_entry
*entry
= symtab
->data
[i
];
18955 && entry
->cu_indices
!= NULL
)
18957 unsigned int next_to_insert
, next_to_check
;
18958 offset_type last_value
;
18960 qsort (VEC_address (offset_type
, entry
->cu_indices
),
18961 VEC_length (offset_type
, entry
->cu_indices
),
18962 sizeof (offset_type
), offset_type_compare
);
18964 last_value
= VEC_index (offset_type
, entry
->cu_indices
, 0);
18965 next_to_insert
= 1;
18966 for (next_to_check
= 1;
18967 next_to_check
< VEC_length (offset_type
, entry
->cu_indices
);
18970 if (VEC_index (offset_type
, entry
->cu_indices
, next_to_check
)
18973 last_value
= VEC_index (offset_type
, entry
->cu_indices
,
18975 VEC_replace (offset_type
, entry
->cu_indices
, next_to_insert
,
18980 VEC_truncate (offset_type
, entry
->cu_indices
, next_to_insert
);
18985 /* Add a vector of indices to the constant pool. */
18988 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
18989 struct symtab_index_entry
*entry
)
18993 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
18996 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
18997 offset_type val
= MAYBE_SWAP (len
);
19002 entry
->index_offset
= obstack_object_size (cpool
);
19004 obstack_grow (cpool
, &val
, sizeof (val
));
19006 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
19009 val
= MAYBE_SWAP (iter
);
19010 obstack_grow (cpool
, &val
, sizeof (val
));
19015 struct symtab_index_entry
*old_entry
= *slot
;
19016 entry
->index_offset
= old_entry
->index_offset
;
19019 return entry
->index_offset
;
19022 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
19023 constant pool entries going into the obstack CPOOL. */
19026 write_hash_table (struct mapped_symtab
*symtab
,
19027 struct obstack
*output
, struct obstack
*cpool
)
19030 htab_t symbol_hash_table
;
19033 symbol_hash_table
= create_symbol_hash_table ();
19034 str_table
= create_strtab ();
19036 /* We add all the index vectors to the constant pool first, to
19037 ensure alignment is ok. */
19038 for (i
= 0; i
< symtab
->size
; ++i
)
19040 if (symtab
->data
[i
])
19041 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
19044 /* Now write out the hash table. */
19045 for (i
= 0; i
< symtab
->size
; ++i
)
19047 offset_type str_off
, vec_off
;
19049 if (symtab
->data
[i
])
19051 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
19052 vec_off
= symtab
->data
[i
]->index_offset
;
19056 /* While 0 is a valid constant pool index, it is not valid
19057 to have 0 for both offsets. */
19062 str_off
= MAYBE_SWAP (str_off
);
19063 vec_off
= MAYBE_SWAP (vec_off
);
19065 obstack_grow (output
, &str_off
, sizeof (str_off
));
19066 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
19069 htab_delete (str_table
);
19070 htab_delete (symbol_hash_table
);
19073 /* Struct to map psymtab to CU index in the index file. */
19074 struct psymtab_cu_index_map
19076 struct partial_symtab
*psymtab
;
19077 unsigned int cu_index
;
19081 hash_psymtab_cu_index (const void *item
)
19083 const struct psymtab_cu_index_map
*map
= item
;
19085 return htab_hash_pointer (map
->psymtab
);
19089 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
19091 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
19092 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
19094 return lhs
->psymtab
== rhs
->psymtab
;
19097 /* Helper struct for building the address table. */
19098 struct addrmap_index_data
19100 struct objfile
*objfile
;
19101 struct obstack
*addr_obstack
;
19102 htab_t cu_index_htab
;
19104 /* Non-zero if the previous_* fields are valid.
19105 We can't write an entry until we see the next entry (since it is only then
19106 that we know the end of the entry). */
19107 int previous_valid
;
19108 /* Index of the CU in the table of all CUs in the index file. */
19109 unsigned int previous_cu_index
;
19110 /* Start address of the CU. */
19111 CORE_ADDR previous_cu_start
;
19114 /* Write an address entry to OBSTACK. */
19117 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
19118 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
19120 offset_type cu_index_to_write
;
19122 CORE_ADDR baseaddr
;
19124 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
19126 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
19127 obstack_grow (obstack
, addr
, 8);
19128 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
19129 obstack_grow (obstack
, addr
, 8);
19130 cu_index_to_write
= MAYBE_SWAP (cu_index
);
19131 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
19134 /* Worker function for traversing an addrmap to build the address table. */
19137 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
19139 struct addrmap_index_data
*data
= datap
;
19140 struct partial_symtab
*pst
= obj
;
19142 if (data
->previous_valid
)
19143 add_address_entry (data
->objfile
, data
->addr_obstack
,
19144 data
->previous_cu_start
, start_addr
,
19145 data
->previous_cu_index
);
19147 data
->previous_cu_start
= start_addr
;
19150 struct psymtab_cu_index_map find_map
, *map
;
19151 find_map
.psymtab
= pst
;
19152 map
= htab_find (data
->cu_index_htab
, &find_map
);
19153 gdb_assert (map
!= NULL
);
19154 data
->previous_cu_index
= map
->cu_index
;
19155 data
->previous_valid
= 1;
19158 data
->previous_valid
= 0;
19163 /* Write OBJFILE's address map to OBSTACK.
19164 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
19165 in the index file. */
19168 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
19169 htab_t cu_index_htab
)
19171 struct addrmap_index_data addrmap_index_data
;
19173 /* When writing the address table, we have to cope with the fact that
19174 the addrmap iterator only provides the start of a region; we have to
19175 wait until the next invocation to get the start of the next region. */
19177 addrmap_index_data
.objfile
= objfile
;
19178 addrmap_index_data
.addr_obstack
= obstack
;
19179 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
19180 addrmap_index_data
.previous_valid
= 0;
19182 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
19183 &addrmap_index_data
);
19185 /* It's highly unlikely the last entry (end address = 0xff...ff)
19186 is valid, but we should still handle it.
19187 The end address is recorded as the start of the next region, but that
19188 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
19190 if (addrmap_index_data
.previous_valid
)
19191 add_address_entry (objfile
, obstack
,
19192 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
19193 addrmap_index_data
.previous_cu_index
);
19196 /* Return the symbol kind of PSYM. */
19198 static gdb_index_symbol_kind
19199 symbol_kind (struct partial_symbol
*psym
)
19201 domain_enum domain
= PSYMBOL_DOMAIN (psym
);
19202 enum address_class aclass
= PSYMBOL_CLASS (psym
);
19210 return GDB_INDEX_SYMBOL_KIND_FUNCTION
;
19212 return GDB_INDEX_SYMBOL_KIND_TYPE
;
19214 case LOC_CONST_BYTES
:
19215 case LOC_OPTIMIZED_OUT
:
19217 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
19219 /* Note: It's currently impossible to recognize psyms as enum values
19220 short of reading the type info. For now punt. */
19221 return GDB_INDEX_SYMBOL_KIND_VARIABLE
;
19223 /* There are other LOC_FOO values that one might want to classify
19224 as variables, but dwarf2read.c doesn't currently use them. */
19225 return GDB_INDEX_SYMBOL_KIND_OTHER
;
19227 case STRUCT_DOMAIN
:
19228 return GDB_INDEX_SYMBOL_KIND_TYPE
;
19230 return GDB_INDEX_SYMBOL_KIND_OTHER
;
19234 /* Add a list of partial symbols to SYMTAB. */
19237 write_psymbols (struct mapped_symtab
*symtab
,
19239 struct partial_symbol
**psymp
,
19241 offset_type cu_index
,
19244 for (; count
-- > 0; ++psymp
)
19246 struct partial_symbol
*psym
= *psymp
;
19249 if (SYMBOL_LANGUAGE (psym
) == language_ada
)
19250 error (_("Ada is not currently supported by the index"));
19252 /* Only add a given psymbol once. */
19253 slot
= htab_find_slot (psyms_seen
, psym
, INSERT
);
19256 gdb_index_symbol_kind kind
= symbol_kind (psym
);
19259 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (psym
),
19260 is_static
, kind
, cu_index
);
19265 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
19266 exception if there is an error. */
19269 write_obstack (FILE *file
, struct obstack
*obstack
)
19271 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
19273 != obstack_object_size (obstack
))
19274 error (_("couldn't data write to file"));
19277 /* Unlink a file if the argument is not NULL. */
19280 unlink_if_set (void *p
)
19282 char **filename
= p
;
19284 unlink (*filename
);
19287 /* A helper struct used when iterating over debug_types. */
19288 struct signatured_type_index_data
19290 struct objfile
*objfile
;
19291 struct mapped_symtab
*symtab
;
19292 struct obstack
*types_list
;
19297 /* A helper function that writes a single signatured_type to an
19301 write_one_signatured_type (void **slot
, void *d
)
19303 struct signatured_type_index_data
*info
= d
;
19304 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
19305 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
19306 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
19309 write_psymbols (info
->symtab
,
19311 info
->objfile
->global_psymbols
.list
19312 + psymtab
->globals_offset
,
19313 psymtab
->n_global_syms
, info
->cu_index
,
19315 write_psymbols (info
->symtab
,
19317 info
->objfile
->static_psymbols
.list
19318 + psymtab
->statics_offset
,
19319 psymtab
->n_static_syms
, info
->cu_index
,
19322 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
19323 entry
->per_cu
.offset
.sect_off
);
19324 obstack_grow (info
->types_list
, val
, 8);
19325 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
19326 entry
->type_offset_in_tu
.cu_off
);
19327 obstack_grow (info
->types_list
, val
, 8);
19328 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
19329 obstack_grow (info
->types_list
, val
, 8);
19336 /* Recurse into all "included" dependencies and write their symbols as
19337 if they appeared in this psymtab. */
19340 recursively_write_psymbols (struct objfile
*objfile
,
19341 struct partial_symtab
*psymtab
,
19342 struct mapped_symtab
*symtab
,
19344 offset_type cu_index
)
19348 for (i
= 0; i
< psymtab
->number_of_dependencies
; ++i
)
19349 if (psymtab
->dependencies
[i
]->user
!= NULL
)
19350 recursively_write_psymbols (objfile
, psymtab
->dependencies
[i
],
19351 symtab
, psyms_seen
, cu_index
);
19353 write_psymbols (symtab
,
19355 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
19356 psymtab
->n_global_syms
, cu_index
,
19358 write_psymbols (symtab
,
19360 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
19361 psymtab
->n_static_syms
, cu_index
,
19365 /* Create an index file for OBJFILE in the directory DIR. */
19368 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
19370 struct cleanup
*cleanup
;
19371 char *filename
, *cleanup_filename
;
19372 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
19373 struct obstack cu_list
, types_cu_list
;
19376 struct mapped_symtab
*symtab
;
19377 offset_type val
, size_of_contents
, total_len
;
19380 htab_t cu_index_htab
;
19381 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
19383 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
19386 if (dwarf2_per_objfile
->using_index
)
19387 error (_("Cannot use an index to create the index"));
19389 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
19390 error (_("Cannot make an index when the file has multiple .debug_types sections"));
19392 if (stat (objfile
->name
, &st
) < 0)
19393 perror_with_name (objfile
->name
);
19395 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
19396 INDEX_SUFFIX
, (char *) NULL
);
19397 cleanup
= make_cleanup (xfree
, filename
);
19399 out_file
= fopen (filename
, "wb");
19401 error (_("Can't open `%s' for writing"), filename
);
19403 cleanup_filename
= filename
;
19404 make_cleanup (unlink_if_set
, &cleanup_filename
);
19406 symtab
= create_mapped_symtab ();
19407 make_cleanup (cleanup_mapped_symtab
, symtab
);
19409 obstack_init (&addr_obstack
);
19410 make_cleanup_obstack_free (&addr_obstack
);
19412 obstack_init (&cu_list
);
19413 make_cleanup_obstack_free (&cu_list
);
19415 obstack_init (&types_cu_list
);
19416 make_cleanup_obstack_free (&types_cu_list
);
19418 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
19419 NULL
, xcalloc
, xfree
);
19420 make_cleanup_htab_delete (psyms_seen
);
19422 /* While we're scanning CU's create a table that maps a psymtab pointer
19423 (which is what addrmap records) to its index (which is what is recorded
19424 in the index file). This will later be needed to write the address
19426 cu_index_htab
= htab_create_alloc (100,
19427 hash_psymtab_cu_index
,
19428 eq_psymtab_cu_index
,
19429 NULL
, xcalloc
, xfree
);
19430 make_cleanup_htab_delete (cu_index_htab
);
19431 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
19432 xmalloc (sizeof (struct psymtab_cu_index_map
)
19433 * dwarf2_per_objfile
->n_comp_units
);
19434 make_cleanup (xfree
, psymtab_cu_index_map
);
19436 /* The CU list is already sorted, so we don't need to do additional
19437 work here. Also, the debug_types entries do not appear in
19438 all_comp_units, but only in their own hash table. */
19439 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
19441 struct dwarf2_per_cu_data
*per_cu
19442 = dwarf2_per_objfile
->all_comp_units
[i
];
19443 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
19445 struct psymtab_cu_index_map
*map
;
19448 if (psymtab
->user
== NULL
)
19449 recursively_write_psymbols (objfile
, psymtab
, symtab
, psyms_seen
, i
);
19451 map
= &psymtab_cu_index_map
[i
];
19452 map
->psymtab
= psymtab
;
19454 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
19455 gdb_assert (slot
!= NULL
);
19456 gdb_assert (*slot
== NULL
);
19459 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
,
19460 per_cu
->offset
.sect_off
);
19461 obstack_grow (&cu_list
, val
, 8);
19462 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
19463 obstack_grow (&cu_list
, val
, 8);
19466 /* Dump the address map. */
19467 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
19469 /* Write out the .debug_type entries, if any. */
19470 if (dwarf2_per_objfile
->signatured_types
)
19472 struct signatured_type_index_data sig_data
;
19474 sig_data
.objfile
= objfile
;
19475 sig_data
.symtab
= symtab
;
19476 sig_data
.types_list
= &types_cu_list
;
19477 sig_data
.psyms_seen
= psyms_seen
;
19478 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
19479 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
19480 write_one_signatured_type
, &sig_data
);
19483 /* Now that we've processed all symbols we can shrink their cu_indices
19485 uniquify_cu_indices (symtab
);
19487 obstack_init (&constant_pool
);
19488 make_cleanup_obstack_free (&constant_pool
);
19489 obstack_init (&symtab_obstack
);
19490 make_cleanup_obstack_free (&symtab_obstack
);
19491 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
19493 obstack_init (&contents
);
19494 make_cleanup_obstack_free (&contents
);
19495 size_of_contents
= 6 * sizeof (offset_type
);
19496 total_len
= size_of_contents
;
19498 /* The version number. */
19499 val
= MAYBE_SWAP (7);
19500 obstack_grow (&contents
, &val
, sizeof (val
));
19502 /* The offset of the CU list from the start of the file. */
19503 val
= MAYBE_SWAP (total_len
);
19504 obstack_grow (&contents
, &val
, sizeof (val
));
19505 total_len
+= obstack_object_size (&cu_list
);
19507 /* The offset of the types CU list from the start of the file. */
19508 val
= MAYBE_SWAP (total_len
);
19509 obstack_grow (&contents
, &val
, sizeof (val
));
19510 total_len
+= obstack_object_size (&types_cu_list
);
19512 /* The offset of the address table from the start of the file. */
19513 val
= MAYBE_SWAP (total_len
);
19514 obstack_grow (&contents
, &val
, sizeof (val
));
19515 total_len
+= obstack_object_size (&addr_obstack
);
19517 /* The offset of the symbol table from the start of the file. */
19518 val
= MAYBE_SWAP (total_len
);
19519 obstack_grow (&contents
, &val
, sizeof (val
));
19520 total_len
+= obstack_object_size (&symtab_obstack
);
19522 /* The offset of the constant pool from the start of the file. */
19523 val
= MAYBE_SWAP (total_len
);
19524 obstack_grow (&contents
, &val
, sizeof (val
));
19525 total_len
+= obstack_object_size (&constant_pool
);
19527 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
19529 write_obstack (out_file
, &contents
);
19530 write_obstack (out_file
, &cu_list
);
19531 write_obstack (out_file
, &types_cu_list
);
19532 write_obstack (out_file
, &addr_obstack
);
19533 write_obstack (out_file
, &symtab_obstack
);
19534 write_obstack (out_file
, &constant_pool
);
19538 /* We want to keep the file, so we set cleanup_filename to NULL
19539 here. See unlink_if_set. */
19540 cleanup_filename
= NULL
;
19542 do_cleanups (cleanup
);
19545 /* Implementation of the `save gdb-index' command.
19547 Note that the file format used by this command is documented in the
19548 GDB manual. Any changes here must be documented there. */
19551 save_gdb_index_command (char *arg
, int from_tty
)
19553 struct objfile
*objfile
;
19556 error (_("usage: save gdb-index DIRECTORY"));
19558 ALL_OBJFILES (objfile
)
19562 /* If the objfile does not correspond to an actual file, skip it. */
19563 if (stat (objfile
->name
, &st
) < 0)
19566 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
19567 if (dwarf2_per_objfile
)
19569 volatile struct gdb_exception except
;
19571 TRY_CATCH (except
, RETURN_MASK_ERROR
)
19573 write_psymtabs_to_index (objfile
, arg
);
19575 if (except
.reason
< 0)
19576 exception_fprintf (gdb_stderr
, except
,
19577 _("Error while writing index for `%s': "),
19585 int dwarf2_always_disassemble
;
19588 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
19589 struct cmd_list_element
*c
, const char *value
)
19591 fprintf_filtered (file
,
19592 _("Whether to always disassemble "
19593 "DWARF expressions is %s.\n"),
19598 show_check_physname (struct ui_file
*file
, int from_tty
,
19599 struct cmd_list_element
*c
, const char *value
)
19601 fprintf_filtered (file
,
19602 _("Whether to check \"physname\" is %s.\n"),
19606 void _initialize_dwarf2_read (void);
19609 _initialize_dwarf2_read (void)
19611 struct cmd_list_element
*c
;
19613 dwarf2_objfile_data_key
19614 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
19616 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
19617 Set DWARF 2 specific variables.\n\
19618 Configure DWARF 2 variables such as the cache size"),
19619 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
19620 0/*allow-unknown*/, &maintenance_set_cmdlist
);
19622 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
19623 Show DWARF 2 specific variables\n\
19624 Show DWARF 2 variables such as the cache size"),
19625 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
19626 0/*allow-unknown*/, &maintenance_show_cmdlist
);
19628 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
19629 &dwarf2_max_cache_age
, _("\
19630 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
19631 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
19632 A higher limit means that cached compilation units will be stored\n\
19633 in memory longer, and more total memory will be used. Zero disables\n\
19634 caching, which can slow down startup."),
19636 show_dwarf2_max_cache_age
,
19637 &set_dwarf2_cmdlist
,
19638 &show_dwarf2_cmdlist
);
19640 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
19641 &dwarf2_always_disassemble
, _("\
19642 Set whether `info address' always disassembles DWARF expressions."), _("\
19643 Show whether `info address' always disassembles DWARF expressions."), _("\
19644 When enabled, DWARF expressions are always printed in an assembly-like\n\
19645 syntax. When disabled, expressions will be printed in a more\n\
19646 conversational style, when possible."),
19648 show_dwarf2_always_disassemble
,
19649 &set_dwarf2_cmdlist
,
19650 &show_dwarf2_cmdlist
);
19652 add_setshow_boolean_cmd ("dwarf2-read", no_class
, &dwarf2_read_debug
, _("\
19653 Set debugging of the dwarf2 reader."), _("\
19654 Show debugging of the dwarf2 reader."), _("\
19655 When enabled, debugging messages are printed during dwarf2 reading\n\
19656 and symtab expansion."),
19659 &setdebuglist
, &showdebuglist
);
19661 add_setshow_zuinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
19662 Set debugging of the dwarf2 DIE reader."), _("\
19663 Show debugging of the dwarf2 DIE reader."), _("\
19664 When enabled (non-zero), DIEs are dumped after they are read in.\n\
19665 The value is the maximum depth to print."),
19668 &setdebuglist
, &showdebuglist
);
19670 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
19671 Set cross-checking of \"physname\" code against demangler."), _("\
19672 Show cross-checking of \"physname\" code against demangler."), _("\
19673 When enabled, GDB's internal \"physname\" code is checked against\n\
19675 NULL
, show_check_physname
,
19676 &setdebuglist
, &showdebuglist
);
19678 add_setshow_boolean_cmd ("use-deprecated-index-sections",
19679 no_class
, &use_deprecated_index_sections
, _("\
19680 Set whether to use deprecated gdb_index sections."), _("\
19681 Show whether to use deprecated gdb_index sections."), _("\
19682 When enabled, deprecated .gdb_index sections are used anyway.\n\
19683 Normally they are ignored either because of a missing feature or\n\
19684 performance issue.\n\
19685 Warning: This option must be enabled before gdb reads the file."),
19688 &setlist
, &showlist
);
19690 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
19692 Save a gdb-index file.\n\
19693 Usage: save gdb-index DIRECTORY"),
19695 set_cmd_completer (c
, filename_completer
);