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"
66 #include "gdb_string.h"
67 #include "gdb_assert.h"
68 #include <sys/types.h>
75 #define MAP_FAILED ((void *) -1)
79 typedef struct symbol
*symbolp
;
82 /* When non-zero, dump DIEs after they are read in. */
83 static int dwarf2_die_debug
= 0;
85 /* When non-zero, cross-check physname against demangler. */
86 static int check_physname
= 0;
90 /* When set, the file that we're processing is known to have debugging
91 info for C++ namespaces. GCC 3.3.x did not produce this information,
92 but later versions do. */
94 static int processing_has_namespace_info
;
96 static const struct objfile_data
*dwarf2_objfile_data_key
;
98 struct dwarf2_section_info
103 /* Not NULL if the section was actually mmapped. */
105 /* Page aligned size of mmapped area. */
106 bfd_size_type map_len
;
107 /* True if we have tried to read this section. */
111 typedef struct dwarf2_section_info dwarf2_section_info_def
;
112 DEF_VEC_O (dwarf2_section_info_def
);
114 /* All offsets in the index are of this type. It must be
115 architecture-independent. */
116 typedef uint32_t offset_type
;
118 DEF_VEC_I (offset_type
);
120 /* A description of the mapped index. The file format is described in
121 a comment by the code that writes the index. */
124 /* Index data format version. */
127 /* The total length of the buffer. */
130 /* A pointer to the address table data. */
131 const gdb_byte
*address_table
;
133 /* Size of the address table data in bytes. */
134 offset_type address_table_size
;
136 /* The symbol table, implemented as a hash table. */
137 const offset_type
*symbol_table
;
139 /* Size in slots, each slot is 2 offset_types. */
140 offset_type symbol_table_slots
;
142 /* A pointer to the constant pool. */
143 const char *constant_pool
;
146 /* Collection of data recorded per objfile.
147 This hangs off of dwarf2_objfile_data_key. */
149 struct dwarf2_per_objfile
151 struct dwarf2_section_info info
;
152 struct dwarf2_section_info abbrev
;
153 struct dwarf2_section_info line
;
154 struct dwarf2_section_info loc
;
155 struct dwarf2_section_info macinfo
;
156 struct dwarf2_section_info macro
;
157 struct dwarf2_section_info str
;
158 struct dwarf2_section_info ranges
;
159 struct dwarf2_section_info frame
;
160 struct dwarf2_section_info eh_frame
;
161 struct dwarf2_section_info gdb_index
;
163 VEC (dwarf2_section_info_def
) *types
;
166 struct objfile
*objfile
;
168 /* Table of all the compilation units. This is used to locate
169 the target compilation unit of a particular reference. */
170 struct dwarf2_per_cu_data
**all_comp_units
;
172 /* The number of compilation units in ALL_COMP_UNITS. */
175 /* The number of .debug_types-related CUs. */
178 /* The .debug_types-related CUs (TUs). */
179 struct dwarf2_per_cu_data
**all_type_units
;
181 /* A chain of compilation units that are currently read in, so that
182 they can be freed later. */
183 struct dwarf2_per_cu_data
*read_in_chain
;
185 /* A table mapping .debug_types signatures to its signatured_type entry.
186 This is NULL if the .debug_types section hasn't been read in yet. */
187 htab_t signatured_types
;
189 /* A flag indicating wether this objfile has a section loaded at a
191 int has_section_at_zero
;
193 /* True if we are using the mapped index,
194 or we are faking it for OBJF_READNOW's sake. */
195 unsigned char using_index
;
197 /* The mapped index, or NULL if .gdb_index is missing or not being used. */
198 struct mapped_index
*index_table
;
200 /* When using index_table, this keeps track of all quick_file_names entries.
201 TUs can share line table entries with CUs or other TUs, and there can be
202 a lot more TUs than unique line tables, so we maintain a separate table
203 of all line table entries to support the sharing. */
204 htab_t quick_file_names_table
;
206 /* Set during partial symbol reading, to prevent queueing of full
208 int reading_partial_symbols
;
210 /* Table mapping type .debug_info DIE offsets to types.
211 This is NULL if not allocated yet.
212 It (currently) makes sense to allocate debug_types_type_hash lazily.
213 To keep things simple we allocate both lazily. */
214 htab_t debug_info_type_hash
;
216 /* Table mapping type .debug_types DIE offsets to types.
217 This is NULL if not allocated yet. */
218 htab_t debug_types_type_hash
;
221 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
223 /* Default names of the debugging sections. */
225 /* Note that if the debugging section has been compressed, it might
226 have a name like .zdebug_info. */
228 static const struct dwarf2_debug_sections dwarf2_elf_names
=
230 { ".debug_info", ".zdebug_info" },
231 { ".debug_abbrev", ".zdebug_abbrev" },
232 { ".debug_line", ".zdebug_line" },
233 { ".debug_loc", ".zdebug_loc" },
234 { ".debug_macinfo", ".zdebug_macinfo" },
235 { ".debug_macro", ".zdebug_macro" },
236 { ".debug_str", ".zdebug_str" },
237 { ".debug_ranges", ".zdebug_ranges" },
238 { ".debug_types", ".zdebug_types" },
239 { ".debug_frame", ".zdebug_frame" },
240 { ".eh_frame", NULL
},
241 { ".gdb_index", ".zgdb_index" },
245 /* local data types */
247 /* We hold several abbreviation tables in memory at the same time. */
248 #ifndef ABBREV_HASH_SIZE
249 #define ABBREV_HASH_SIZE 121
252 /* The data in a compilation unit header, after target2host
253 translation, looks like this. */
254 struct comp_unit_head
258 unsigned char addr_size
;
259 unsigned char signed_addr_p
;
260 unsigned int abbrev_offset
;
262 /* Size of file offsets; either 4 or 8. */
263 unsigned int offset_size
;
265 /* Size of the length field; either 4 or 12. */
266 unsigned int initial_length_size
;
268 /* Offset to the first byte of this compilation unit header in the
269 .debug_info section, for resolving relative reference dies. */
272 /* Offset to first die in this cu from the start of the cu.
273 This will be the first byte following the compilation unit header. */
274 unsigned int first_die_offset
;
277 /* Type used for delaying computation of method physnames.
278 See comments for compute_delayed_physnames. */
279 struct delayed_method_info
281 /* The type to which the method is attached, i.e., its parent class. */
284 /* The index of the method in the type's function fieldlists. */
287 /* The index of the method in the fieldlist. */
290 /* The name of the DIE. */
293 /* The DIE associated with this method. */
294 struct die_info
*die
;
297 typedef struct delayed_method_info delayed_method_info
;
298 DEF_VEC_O (delayed_method_info
);
300 /* Internal state when decoding a particular compilation unit. */
303 /* The objfile containing this compilation unit. */
304 struct objfile
*objfile
;
306 /* The header of the compilation unit. */
307 struct comp_unit_head header
;
309 /* Base address of this compilation unit. */
310 CORE_ADDR base_address
;
312 /* Non-zero if base_address has been set. */
315 /* The language we are debugging. */
316 enum language language
;
317 const struct language_defn
*language_defn
;
319 const char *producer
;
321 /* The generic symbol table building routines have separate lists for
322 file scope symbols and all all other scopes (local scopes). So
323 we need to select the right one to pass to add_symbol_to_list().
324 We do it by keeping a pointer to the correct list in list_in_scope.
326 FIXME: The original dwarf code just treated the file scope as the
327 first local scope, and all other local scopes as nested local
328 scopes, and worked fine. Check to see if we really need to
329 distinguish these in buildsym.c. */
330 struct pending
**list_in_scope
;
332 /* DWARF abbreviation table associated with this compilation unit. */
333 struct abbrev_info
**dwarf2_abbrevs
;
335 /* Storage for the abbrev table. */
336 struct obstack abbrev_obstack
;
338 /* Hash table holding all the loaded partial DIEs. */
341 /* Storage for things with the same lifetime as this read-in compilation
342 unit, including partial DIEs. */
343 struct obstack comp_unit_obstack
;
345 /* When multiple dwarf2_cu structures are living in memory, this field
346 chains them all together, so that they can be released efficiently.
347 We will probably also want a generation counter so that most-recently-used
348 compilation units are cached... */
349 struct dwarf2_per_cu_data
*read_in_chain
;
351 /* Backchain to our per_cu entry if the tree has been built. */
352 struct dwarf2_per_cu_data
*per_cu
;
354 /* How many compilation units ago was this CU last referenced? */
357 /* A hash table of die offsets for following references. */
360 /* Full DIEs if read in. */
361 struct die_info
*dies
;
363 /* A set of pointers to dwarf2_per_cu_data objects for compilation
364 units referenced by this one. Only set during full symbol processing;
365 partial symbol tables do not have dependencies. */
368 /* Header data from the line table, during full symbol processing. */
369 struct line_header
*line_header
;
371 /* A list of methods which need to have physnames computed
372 after all type information has been read. */
373 VEC (delayed_method_info
) *method_list
;
375 /* To be copied to symtab->call_site_htab. */
376 htab_t call_site_htab
;
378 /* Mark used when releasing cached dies. */
379 unsigned int mark
: 1;
381 /* This CU references .debug_loc. See the symtab->locations_valid field.
382 This test is imperfect as there may exist optimized debug code not using
383 any location list and still facing inlining issues if handled as
384 unoptimized code. For a future better test see GCC PR other/32998. */
385 unsigned int has_loclist
: 1;
388 /* Persistent data held for a compilation unit, even when not
389 processing it. We put a pointer to this structure in the
390 read_symtab_private field of the psymtab. */
392 struct dwarf2_per_cu_data
394 /* The start offset and length of this compilation unit. 2**29-1
395 bytes should suffice to store the length of any compilation unit
396 - if it doesn't, GDB will fall over anyway.
397 NOTE: Unlike comp_unit_head.length, this length includes
398 initial_length_size. */
400 unsigned int length
: 29;
402 /* Flag indicating this compilation unit will be read in before
403 any of the current compilation units are processed. */
404 unsigned int queued
: 1;
406 /* This flag will be set if we need to load absolutely all DIEs
407 for this compilation unit, instead of just the ones we think
408 are interesting. It gets set if we look for a DIE in the
409 hash table and don't find it. */
410 unsigned int load_all_dies
: 1;
412 /* Non-null if this CU is from .debug_types; in which case it points
413 to the section. Otherwise it's from .debug_info. */
414 struct dwarf2_section_info
*debug_types_section
;
416 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
417 of the CU cache it gets reset to NULL again. */
418 struct dwarf2_cu
*cu
;
420 /* The corresponding objfile.
421 Normally we can get the objfile from dwarf2_per_objfile.
422 However we can enter this file with just a "per_cu" handle. */
423 struct objfile
*objfile
;
425 /* When using partial symbol tables, the 'psymtab' field is active.
426 Otherwise the 'quick' field is active. */
429 /* The partial symbol table associated with this compilation unit,
430 or NULL for partial units (which do not have an associated
432 struct partial_symtab
*psymtab
;
434 /* Data needed by the "quick" functions. */
435 struct dwarf2_per_cu_quick_data
*quick
;
439 /* Entry in the signatured_types hash table. */
441 struct signatured_type
445 /* Offset in .debug_types of the type defined by this TU. */
446 unsigned int type_offset
;
448 /* The CU(/TU) of this type. */
449 struct dwarf2_per_cu_data per_cu
;
452 /* Struct used to pass misc. parameters to read_die_and_children, et
453 al. which are used for both .debug_info and .debug_types dies.
454 All parameters here are unchanging for the life of the call. This
455 struct exists to abstract away the constant parameters of die
458 struct die_reader_specs
460 /* The bfd of this objfile. */
463 /* The CU of the DIE we are parsing. */
464 struct dwarf2_cu
*cu
;
466 /* Pointer to start of section buffer.
467 This is either the start of .debug_info or .debug_types. */
468 const gdb_byte
*buffer
;
471 /* The line number information for a compilation unit (found in the
472 .debug_line section) begins with a "statement program header",
473 which contains the following information. */
476 unsigned int total_length
;
477 unsigned short version
;
478 unsigned int header_length
;
479 unsigned char minimum_instruction_length
;
480 unsigned char maximum_ops_per_instruction
;
481 unsigned char default_is_stmt
;
483 unsigned char line_range
;
484 unsigned char opcode_base
;
486 /* standard_opcode_lengths[i] is the number of operands for the
487 standard opcode whose value is i. This means that
488 standard_opcode_lengths[0] is unused, and the last meaningful
489 element is standard_opcode_lengths[opcode_base - 1]. */
490 unsigned char *standard_opcode_lengths
;
492 /* The include_directories table. NOTE! These strings are not
493 allocated with xmalloc; instead, they are pointers into
494 debug_line_buffer. If you try to free them, `free' will get
496 unsigned int num_include_dirs
, include_dirs_size
;
499 /* The file_names table. NOTE! These strings are not allocated
500 with xmalloc; instead, they are pointers into debug_line_buffer.
501 Don't try to free them directly. */
502 unsigned int num_file_names
, file_names_size
;
506 unsigned int dir_index
;
507 unsigned int mod_time
;
509 int included_p
; /* Non-zero if referenced by the Line Number Program. */
510 struct symtab
*symtab
; /* The associated symbol table, if any. */
513 /* The start and end of the statement program following this
514 header. These point into dwarf2_per_objfile->line_buffer. */
515 gdb_byte
*statement_program_start
, *statement_program_end
;
518 /* When we construct a partial symbol table entry we only
519 need this much information. */
520 struct partial_die_info
522 /* Offset of this DIE. */
525 /* DWARF-2 tag for this DIE. */
526 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
528 /* Assorted flags describing the data found in this DIE. */
529 unsigned int has_children
: 1;
530 unsigned int is_external
: 1;
531 unsigned int is_declaration
: 1;
532 unsigned int has_type
: 1;
533 unsigned int has_specification
: 1;
534 unsigned int has_pc_info
: 1;
536 /* Flag set if the SCOPE field of this structure has been
538 unsigned int scope_set
: 1;
540 /* Flag set if the DIE has a byte_size attribute. */
541 unsigned int has_byte_size
: 1;
543 /* Flag set if any of the DIE's children are template arguments. */
544 unsigned int has_template_arguments
: 1;
546 /* Flag set if fixup_partial_die has been called on this die. */
547 unsigned int fixup_called
: 1;
549 /* The name of this DIE. Normally the value of DW_AT_name, but
550 sometimes a default name for unnamed DIEs. */
553 /* The linkage name, if present. */
554 const char *linkage_name
;
556 /* The scope to prepend to our children. This is generally
557 allocated on the comp_unit_obstack, so will disappear
558 when this compilation unit leaves the cache. */
561 /* The location description associated with this DIE, if any. */
562 struct dwarf_block
*locdesc
;
564 /* If HAS_PC_INFO, the PC range associated with this DIE. */
568 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
569 DW_AT_sibling, if any. */
570 /* NOTE: This member isn't strictly necessary, read_partial_die could
571 return DW_AT_sibling values to its caller load_partial_dies. */
574 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
575 DW_AT_specification (or DW_AT_abstract_origin or
577 unsigned int spec_offset
;
579 /* Pointers to this DIE's parent, first child, and next sibling,
581 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
584 /* This data structure holds the information of an abbrev. */
587 unsigned int number
; /* number identifying abbrev */
588 enum dwarf_tag tag
; /* dwarf tag */
589 unsigned short has_children
; /* boolean */
590 unsigned short num_attrs
; /* number of attributes */
591 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
592 struct abbrev_info
*next
; /* next in chain */
597 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
598 ENUM_BITFIELD(dwarf_form
) form
: 16;
601 /* Attributes have a name and a value. */
604 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
605 ENUM_BITFIELD(dwarf_form
) form
: 15;
607 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
608 field should be in u.str (existing only for DW_STRING) but it is kept
609 here for better struct attribute alignment. */
610 unsigned int string_is_canonical
: 1;
615 struct dwarf_block
*blk
;
619 struct signatured_type
*signatured_type
;
624 /* This data structure holds a complete die structure. */
627 /* DWARF-2 tag for this DIE. */
628 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
630 /* Number of attributes */
631 unsigned char num_attrs
;
633 /* True if we're presently building the full type name for the
634 type derived from this DIE. */
635 unsigned char building_fullname
: 1;
640 /* Offset in .debug_info or .debug_types section. */
643 /* The dies in a compilation unit form an n-ary tree. PARENT
644 points to this die's parent; CHILD points to the first child of
645 this node; and all the children of a given node are chained
646 together via their SIBLING fields. */
647 struct die_info
*child
; /* Its first child, if any. */
648 struct die_info
*sibling
; /* Its next sibling, if any. */
649 struct die_info
*parent
; /* Its parent, if any. */
651 /* An array of attributes, with NUM_ATTRS elements. There may be
652 zero, but it's not common and zero-sized arrays are not
653 sufficiently portable C. */
654 struct attribute attrs
[1];
657 /* Get at parts of an attribute structure. */
659 #define DW_STRING(attr) ((attr)->u.str)
660 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
661 #define DW_UNSND(attr) ((attr)->u.unsnd)
662 #define DW_BLOCK(attr) ((attr)->u.blk)
663 #define DW_SND(attr) ((attr)->u.snd)
664 #define DW_ADDR(attr) ((attr)->u.addr)
665 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
667 /* Blocks are a bunch of untyped bytes. */
672 /* Valid only if SIZE is not zero. */
676 #ifndef ATTR_ALLOC_CHUNK
677 #define ATTR_ALLOC_CHUNK 4
680 /* Allocate fields for structs, unions and enums in this size. */
681 #ifndef DW_FIELD_ALLOC_CHUNK
682 #define DW_FIELD_ALLOC_CHUNK 4
685 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
686 but this would require a corresponding change in unpack_field_as_long
688 static int bits_per_byte
= 8;
690 /* The routines that read and process dies for a C struct or C++ class
691 pass lists of data member fields and lists of member function fields
692 in an instance of a field_info structure, as defined below. */
695 /* List of data member and baseclasses fields. */
698 struct nextfield
*next
;
703 *fields
, *baseclasses
;
705 /* Number of fields (including baseclasses). */
708 /* Number of baseclasses. */
711 /* Set if the accesibility of one of the fields is not public. */
712 int non_public_fields
;
714 /* Member function fields array, entries are allocated in the order they
715 are encountered in the object file. */
718 struct nextfnfield
*next
;
719 struct fn_field fnfield
;
723 /* Member function fieldlist array, contains name of possibly overloaded
724 member function, number of overloaded member functions and a pointer
725 to the head of the member function field chain. */
730 struct nextfnfield
*head
;
734 /* Number of entries in the fnfieldlists array. */
737 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
738 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
739 struct typedef_field_list
741 struct typedef_field field
;
742 struct typedef_field_list
*next
;
745 unsigned typedef_field_list_count
;
748 /* One item on the queue of compilation units to read in full symbols
750 struct dwarf2_queue_item
752 struct dwarf2_per_cu_data
*per_cu
;
753 struct dwarf2_queue_item
*next
;
756 /* The current queue. */
757 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
759 /* Loaded secondary compilation units are kept in memory until they
760 have not been referenced for the processing of this many
761 compilation units. Set this to zero to disable caching. Cache
762 sizes of up to at least twenty will improve startup time for
763 typical inter-CU-reference binaries, at an obvious memory cost. */
764 static int dwarf2_max_cache_age
= 5;
766 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
767 struct cmd_list_element
*c
, const char *value
)
769 fprintf_filtered (file
, _("The upper bound on the age of cached "
770 "dwarf2 compilation units is %s.\n"),
775 /* Various complaints about symbol reading that don't abort the process. */
778 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
780 complaint (&symfile_complaints
,
781 _("statement list doesn't fit in .debug_line section"));
785 dwarf2_debug_line_missing_file_complaint (void)
787 complaint (&symfile_complaints
,
788 _(".debug_line section has line data without a file"));
792 dwarf2_debug_line_missing_end_sequence_complaint (void)
794 complaint (&symfile_complaints
,
795 _(".debug_line section has line "
796 "program sequence without an end"));
800 dwarf2_complex_location_expr_complaint (void)
802 complaint (&symfile_complaints
, _("location expression too complex"));
806 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
809 complaint (&symfile_complaints
,
810 _("const value length mismatch for '%s', got %d, expected %d"),
815 dwarf2_macros_too_long_complaint (struct dwarf2_section_info
*section
)
817 complaint (&symfile_complaints
,
818 _("macro info runs off end of `%s' section"),
819 section
->asection
->name
);
823 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
825 complaint (&symfile_complaints
,
826 _("macro debug info contains a "
827 "malformed macro definition:\n`%s'"),
832 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
834 complaint (&symfile_complaints
,
835 _("invalid attribute class or form for '%s' in '%s'"),
839 /* local function prototypes */
841 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
843 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
846 static void dwarf2_find_base_address (struct die_info
*die
,
847 struct dwarf2_cu
*cu
);
849 static void dwarf2_build_psymtabs_hard (struct objfile
*);
851 static void scan_partial_symbols (struct partial_die_info
*,
852 CORE_ADDR
*, CORE_ADDR
*,
853 int, struct dwarf2_cu
*);
855 static void add_partial_symbol (struct partial_die_info
*,
858 static void add_partial_namespace (struct partial_die_info
*pdi
,
859 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
860 int need_pc
, struct dwarf2_cu
*cu
);
862 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
863 CORE_ADDR
*highpc
, int need_pc
,
864 struct dwarf2_cu
*cu
);
866 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
867 struct dwarf2_cu
*cu
);
869 static void add_partial_subprogram (struct partial_die_info
*pdi
,
870 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
871 int need_pc
, struct dwarf2_cu
*cu
);
873 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
874 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
875 bfd
*abfd
, struct dwarf2_cu
*cu
);
877 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
879 static void psymtab_to_symtab_1 (struct partial_symtab
*);
881 static void dwarf2_read_abbrevs (struct dwarf2_cu
*cu
);
883 static void dwarf2_free_abbrev_table (void *);
885 static unsigned int peek_abbrev_code (bfd
*, gdb_byte
*);
887 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
890 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
893 static struct partial_die_info
*load_partial_dies (bfd
*,
894 gdb_byte
*, gdb_byte
*,
895 int, struct dwarf2_cu
*);
897 static gdb_byte
*read_partial_die (struct partial_die_info
*,
898 struct abbrev_info
*abbrev
,
900 gdb_byte
*, gdb_byte
*,
903 static struct partial_die_info
*find_partial_die (unsigned int,
906 static void fixup_partial_die (struct partial_die_info
*,
909 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
910 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
912 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
913 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
915 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
917 static int read_1_signed_byte (bfd
*, gdb_byte
*);
919 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
921 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
923 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
925 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
928 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
930 static LONGEST read_checked_initial_length_and_offset
931 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
932 unsigned int *, unsigned int *);
934 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
937 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
939 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
941 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
943 static char *read_indirect_string (bfd
*, gdb_byte
*,
944 const struct comp_unit_head
*,
947 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
949 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
951 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
953 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
955 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
958 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
962 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
963 struct dwarf2_cu
*cu
);
965 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
967 static struct die_info
*die_specification (struct die_info
*die
,
968 struct dwarf2_cu
**);
970 static void free_line_header (struct line_header
*lh
);
972 static void add_file_name (struct line_header
*, char *, unsigned int,
973 unsigned int, unsigned int);
975 static struct line_header
*(dwarf_decode_line_header
976 (unsigned int offset
,
977 bfd
*abfd
, struct dwarf2_cu
*cu
));
979 static void dwarf_decode_lines (struct line_header
*, const char *,
980 struct dwarf2_cu
*, struct partial_symtab
*,
983 static void dwarf2_start_subfile (char *, const char *, const char *);
985 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
988 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
989 struct dwarf2_cu
*, struct symbol
*);
991 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
994 static void dwarf2_const_value_attr (struct attribute
*attr
,
997 struct obstack
*obstack
,
998 struct dwarf2_cu
*cu
, long *value
,
1000 struct dwarf2_locexpr_baton
**baton
);
1002 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1004 static int need_gnat_info (struct dwarf2_cu
*);
1006 static struct type
*die_descriptive_type (struct die_info
*,
1007 struct dwarf2_cu
*);
1009 static void set_descriptive_type (struct type
*, struct die_info
*,
1010 struct dwarf2_cu
*);
1012 static struct type
*die_containing_type (struct die_info
*,
1013 struct dwarf2_cu
*);
1015 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1016 struct dwarf2_cu
*);
1018 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1020 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1022 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1024 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1025 const char *suffix
, int physname
,
1026 struct dwarf2_cu
*cu
);
1028 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1030 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1032 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1034 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1036 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1038 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1039 struct dwarf2_cu
*, struct partial_symtab
*);
1041 static int dwarf2_get_pc_bounds (struct die_info
*,
1042 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1043 struct partial_symtab
*);
1045 static void get_scope_pc_bounds (struct die_info
*,
1046 CORE_ADDR
*, CORE_ADDR
*,
1047 struct dwarf2_cu
*);
1049 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1050 CORE_ADDR
, struct dwarf2_cu
*);
1052 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1053 struct dwarf2_cu
*);
1055 static void dwarf2_attach_fields_to_type (struct field_info
*,
1056 struct type
*, struct dwarf2_cu
*);
1058 static void dwarf2_add_member_fn (struct field_info
*,
1059 struct die_info
*, struct type
*,
1060 struct dwarf2_cu
*);
1062 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1064 struct dwarf2_cu
*);
1066 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1068 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1070 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1072 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1074 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1076 static struct type
*read_module_type (struct die_info
*die
,
1077 struct dwarf2_cu
*cu
);
1079 static const char *namespace_name (struct die_info
*die
,
1080 int *is_anonymous
, struct dwarf2_cu
*);
1082 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1084 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1086 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1087 struct dwarf2_cu
*);
1089 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1091 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1093 gdb_byte
**new_info_ptr
,
1094 struct die_info
*parent
);
1096 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1098 gdb_byte
**new_info_ptr
,
1099 struct die_info
*parent
);
1101 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1103 gdb_byte
**new_info_ptr
,
1104 struct die_info
*parent
);
1106 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1107 struct die_info
**, gdb_byte
*,
1110 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1112 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1115 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1117 static const char *dwarf2_full_name (char *name
,
1118 struct die_info
*die
,
1119 struct dwarf2_cu
*cu
);
1121 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1122 struct dwarf2_cu
**);
1124 static char *dwarf_tag_name (unsigned int);
1126 static char *dwarf_attr_name (unsigned int);
1128 static char *dwarf_form_name (unsigned int);
1130 static char *dwarf_bool_name (unsigned int);
1132 static char *dwarf_type_encoding_name (unsigned int);
1135 static char *dwarf_cfi_name (unsigned int);
1138 static struct die_info
*sibling_die (struct die_info
*);
1140 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1142 static void dump_die_for_error (struct die_info
*);
1144 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1147 /*static*/ void dump_die (struct die_info
*, int max_level
);
1149 static void store_in_ref_table (struct die_info
*,
1150 struct dwarf2_cu
*);
1152 static int is_ref_attr (struct attribute
*);
1154 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1156 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1158 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1160 struct dwarf2_cu
**);
1162 static struct die_info
*follow_die_ref (struct die_info
*,
1164 struct dwarf2_cu
**);
1166 static struct die_info
*follow_die_sig (struct die_info
*,
1168 struct dwarf2_cu
**);
1170 static struct signatured_type
*lookup_signatured_type_at_offset
1171 (struct objfile
*objfile
,
1172 struct dwarf2_section_info
*section
,
1173 unsigned int offset
);
1175 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1177 static void read_signatured_type (struct signatured_type
*type_sig
);
1179 /* memory allocation interface */
1181 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1183 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1185 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1187 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1188 char *, bfd
*, struct dwarf2_cu
*,
1189 struct dwarf2_section_info
*,
1192 static int attr_form_is_block (struct attribute
*);
1194 static int attr_form_is_section_offset (struct attribute
*);
1196 static int attr_form_is_constant (struct attribute
*);
1198 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1199 struct dwarf2_loclist_baton
*baton
,
1200 struct attribute
*attr
);
1202 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1204 struct dwarf2_cu
*cu
);
1206 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1207 struct abbrev_info
*abbrev
,
1208 struct dwarf2_cu
*cu
);
1210 static void free_stack_comp_unit (void *);
1212 static hashval_t
partial_die_hash (const void *item
);
1214 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1216 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1217 (unsigned int offset
, struct objfile
*objfile
);
1219 static void init_one_comp_unit (struct dwarf2_cu
*cu
,
1220 struct dwarf2_per_cu_data
*per_cu
);
1222 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1223 struct die_info
*comp_unit_die
);
1225 static void free_heap_comp_unit (void *);
1227 static void free_cached_comp_units (void *);
1229 static void age_cached_comp_units (void);
1231 static void free_one_cached_comp_unit (void *);
1233 static struct type
*set_die_type (struct die_info
*, struct type
*,
1234 struct dwarf2_cu
*);
1236 static void create_all_comp_units (struct objfile
*);
1238 static int create_debug_types_hash_table (struct objfile
*objfile
);
1240 static void load_full_comp_unit (struct dwarf2_per_cu_data
*);
1242 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1244 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1245 struct dwarf2_per_cu_data
*);
1247 static void dwarf2_mark (struct dwarf2_cu
*);
1249 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1251 static struct type
*get_die_type_at_offset (unsigned int,
1252 struct dwarf2_per_cu_data
*per_cu
);
1254 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1256 static void dwarf2_release_queue (void *dummy
);
1258 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
);
1260 static void process_queue (void);
1262 static void find_file_and_directory (struct die_info
*die
,
1263 struct dwarf2_cu
*cu
,
1264 char **name
, char **comp_dir
);
1266 static char *file_full_name (int file
, struct line_header
*lh
,
1267 const char *comp_dir
);
1269 static gdb_byte
*read_and_check_comp_unit_head
1270 (struct comp_unit_head
*header
,
1271 struct dwarf2_section_info
*section
, gdb_byte
*info_ptr
,
1272 int is_debug_types_section
);
1274 static void init_cu_die_reader (struct die_reader_specs
*reader
,
1275 struct dwarf2_cu
*cu
);
1277 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1281 /* Convert VALUE between big- and little-endian. */
1283 byte_swap (offset_type value
)
1287 result
= (value
& 0xff) << 24;
1288 result
|= (value
& 0xff00) << 8;
1289 result
|= (value
& 0xff0000) >> 8;
1290 result
|= (value
& 0xff000000) >> 24;
1294 #define MAYBE_SWAP(V) byte_swap (V)
1297 #define MAYBE_SWAP(V) (V)
1298 #endif /* WORDS_BIGENDIAN */
1300 /* The suffix for an index file. */
1301 #define INDEX_SUFFIX ".gdb-index"
1303 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1304 struct dwarf2_cu
*cu
);
1306 /* Try to locate the sections we need for DWARF 2 debugging
1307 information and return true if we have enough to do something.
1308 NAMES points to the dwarf2 section names, or is NULL if the standard
1309 ELF names are used. */
1312 dwarf2_has_info (struct objfile
*objfile
,
1313 const struct dwarf2_debug_sections
*names
)
1315 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1316 if (!dwarf2_per_objfile
)
1318 /* Initialize per-objfile state. */
1319 struct dwarf2_per_objfile
*data
1320 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1322 memset (data
, 0, sizeof (*data
));
1323 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1324 dwarf2_per_objfile
= data
;
1326 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
,
1328 dwarf2_per_objfile
->objfile
= objfile
;
1330 return (dwarf2_per_objfile
->info
.asection
!= NULL
1331 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1334 /* When loading sections, we look either for uncompressed section or for
1335 compressed section names. */
1338 section_is_p (const char *section_name
,
1339 const struct dwarf2_section_names
*names
)
1341 if (names
->normal
!= NULL
1342 && strcmp (section_name
, names
->normal
) == 0)
1344 if (names
->compressed
!= NULL
1345 && strcmp (section_name
, names
->compressed
) == 0)
1350 /* This function is mapped across the sections and remembers the
1351 offset and size of each of the debugging sections we are interested
1355 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *vnames
)
1357 const struct dwarf2_debug_sections
*names
;
1360 names
= &dwarf2_elf_names
;
1362 names
= (const struct dwarf2_debug_sections
*) vnames
;
1364 if (section_is_p (sectp
->name
, &names
->info
))
1366 dwarf2_per_objfile
->info
.asection
= sectp
;
1367 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1369 else if (section_is_p (sectp
->name
, &names
->abbrev
))
1371 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1372 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1374 else if (section_is_p (sectp
->name
, &names
->line
))
1376 dwarf2_per_objfile
->line
.asection
= sectp
;
1377 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1379 else if (section_is_p (sectp
->name
, &names
->loc
))
1381 dwarf2_per_objfile
->loc
.asection
= sectp
;
1382 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1384 else if (section_is_p (sectp
->name
, &names
->macinfo
))
1386 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1387 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1389 else if (section_is_p (sectp
->name
, &names
->macro
))
1391 dwarf2_per_objfile
->macro
.asection
= sectp
;
1392 dwarf2_per_objfile
->macro
.size
= bfd_get_section_size (sectp
);
1394 else if (section_is_p (sectp
->name
, &names
->str
))
1396 dwarf2_per_objfile
->str
.asection
= sectp
;
1397 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1399 else if (section_is_p (sectp
->name
, &names
->frame
))
1401 dwarf2_per_objfile
->frame
.asection
= sectp
;
1402 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1404 else if (section_is_p (sectp
->name
, &names
->eh_frame
))
1406 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1408 if (aflag
& SEC_HAS_CONTENTS
)
1410 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1411 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1414 else if (section_is_p (sectp
->name
, &names
->ranges
))
1416 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1417 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1419 else if (section_is_p (sectp
->name
, &names
->types
))
1421 struct dwarf2_section_info type_section
;
1423 memset (&type_section
, 0, sizeof (type_section
));
1424 type_section
.asection
= sectp
;
1425 type_section
.size
= bfd_get_section_size (sectp
);
1427 VEC_safe_push (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
1430 else if (section_is_p (sectp
->name
, &names
->gdb_index
))
1432 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1433 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1436 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1437 && bfd_section_vma (abfd
, sectp
) == 0)
1438 dwarf2_per_objfile
->has_section_at_zero
= 1;
1441 /* Decompress a section that was compressed using zlib. Store the
1442 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1445 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1446 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1448 bfd
*abfd
= objfile
->obfd
;
1450 error (_("Support for zlib-compressed DWARF data (from '%s') "
1451 "is disabled in this copy of GDB"),
1452 bfd_get_filename (abfd
));
1454 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1455 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1456 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1457 bfd_size_type uncompressed_size
;
1458 gdb_byte
*uncompressed_buffer
;
1461 int header_size
= 12;
1463 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1464 || bfd_bread (compressed_buffer
,
1465 compressed_size
, abfd
) != compressed_size
)
1466 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1467 bfd_get_filename (abfd
));
1469 /* Read the zlib header. In this case, it should be "ZLIB" followed
1470 by the uncompressed section size, 8 bytes in big-endian order. */
1471 if (compressed_size
< header_size
1472 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1473 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1474 bfd_get_filename (abfd
));
1475 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1476 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1477 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1478 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1479 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1480 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1481 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1482 uncompressed_size
+= compressed_buffer
[11];
1484 /* It is possible the section consists of several compressed
1485 buffers concatenated together, so we uncompress in a loop. */
1489 strm
.avail_in
= compressed_size
- header_size
;
1490 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1491 strm
.avail_out
= uncompressed_size
;
1492 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1494 rc
= inflateInit (&strm
);
1495 while (strm
.avail_in
> 0)
1498 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1499 bfd_get_filename (abfd
), rc
);
1500 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1501 + (uncompressed_size
- strm
.avail_out
));
1502 rc
= inflate (&strm
, Z_FINISH
);
1503 if (rc
!= Z_STREAM_END
)
1504 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1505 bfd_get_filename (abfd
), rc
);
1506 rc
= inflateReset (&strm
);
1508 rc
= inflateEnd (&strm
);
1510 || strm
.avail_out
!= 0)
1511 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1512 bfd_get_filename (abfd
), rc
);
1514 do_cleanups (cleanup
);
1515 *outbuf
= uncompressed_buffer
;
1516 *outsize
= uncompressed_size
;
1520 /* A helper function that decides whether a section is empty. */
1523 dwarf2_section_empty_p (struct dwarf2_section_info
*info
)
1525 return info
->asection
== NULL
|| info
->size
== 0;
1528 /* Read the contents of the section INFO from object file specified by
1529 OBJFILE, store info about the section into INFO.
1530 If the section is compressed, uncompress it before returning. */
1533 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1535 bfd
*abfd
= objfile
->obfd
;
1536 asection
*sectp
= info
->asection
;
1537 gdb_byte
*buf
, *retbuf
;
1538 unsigned char header
[4];
1542 info
->buffer
= NULL
;
1543 info
->map_addr
= NULL
;
1546 if (dwarf2_section_empty_p (info
))
1549 /* Check if the file has a 4-byte header indicating compression. */
1550 if (info
->size
> sizeof (header
)
1551 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1552 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1554 /* Upon decompression, update the buffer and its size. */
1555 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1557 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1565 pagesize
= getpagesize ();
1567 /* Only try to mmap sections which are large enough: we don't want to
1568 waste space due to fragmentation. Also, only try mmap for sections
1569 without relocations. */
1571 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1573 info
->buffer
= bfd_mmap (abfd
, 0, info
->size
, PROT_READ
,
1574 MAP_PRIVATE
, sectp
->filepos
,
1575 &info
->map_addr
, &info
->map_len
);
1577 if ((caddr_t
)info
->buffer
!= MAP_FAILED
)
1579 #if HAVE_POSIX_MADVISE
1580 posix_madvise (info
->map_addr
, info
->map_len
, POSIX_MADV_WILLNEED
);
1587 /* If we get here, we are a normal, not-compressed section. */
1589 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1591 /* When debugging .o files, we may need to apply relocations; see
1592 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1593 We never compress sections in .o files, so we only need to
1594 try this when the section is not compressed. */
1595 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1598 info
->buffer
= retbuf
;
1602 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1603 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1604 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1605 bfd_get_filename (abfd
));
1608 /* A helper function that returns the size of a section in a safe way.
1609 If you are positive that the section has been read before using the
1610 size, then it is safe to refer to the dwarf2_section_info object's
1611 "size" field directly. In other cases, you must call this
1612 function, because for compressed sections the size field is not set
1613 correctly until the section has been read. */
1615 static bfd_size_type
1616 dwarf2_section_size (struct objfile
*objfile
,
1617 struct dwarf2_section_info
*info
)
1620 dwarf2_read_section (objfile
, info
);
1624 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1628 dwarf2_get_section_info (struct objfile
*objfile
,
1629 enum dwarf2_section_enum sect
,
1630 asection
**sectp
, gdb_byte
**bufp
,
1631 bfd_size_type
*sizep
)
1633 struct dwarf2_per_objfile
*data
1634 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1635 struct dwarf2_section_info
*info
;
1637 /* We may see an objfile without any DWARF, in which case we just
1648 case DWARF2_DEBUG_FRAME
:
1649 info
= &data
->frame
;
1651 case DWARF2_EH_FRAME
:
1652 info
= &data
->eh_frame
;
1655 gdb_assert_not_reached ("unexpected section");
1658 dwarf2_read_section (objfile
, info
);
1660 *sectp
= info
->asection
;
1661 *bufp
= info
->buffer
;
1662 *sizep
= info
->size
;
1666 /* DWARF quick_symbols_functions support. */
1668 /* TUs can share .debug_line entries, and there can be a lot more TUs than
1669 unique line tables, so we maintain a separate table of all .debug_line
1670 derived entries to support the sharing.
1671 All the quick functions need is the list of file names. We discard the
1672 line_header when we're done and don't need to record it here. */
1673 struct quick_file_names
1675 /* The offset in .debug_line of the line table. We hash on this. */
1676 unsigned int offset
;
1678 /* The number of entries in file_names, real_names. */
1679 unsigned int num_file_names
;
1681 /* The file names from the line table, after being run through
1683 const char **file_names
;
1685 /* The file names from the line table after being run through
1686 gdb_realpath. These are computed lazily. */
1687 const char **real_names
;
1690 /* When using the index (and thus not using psymtabs), each CU has an
1691 object of this type. This is used to hold information needed by
1692 the various "quick" methods. */
1693 struct dwarf2_per_cu_quick_data
1695 /* The file table. This can be NULL if there was no file table
1696 or it's currently not read in.
1697 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
1698 struct quick_file_names
*file_names
;
1700 /* The corresponding symbol table. This is NULL if symbols for this
1701 CU have not yet been read. */
1702 struct symtab
*symtab
;
1704 /* A temporary mark bit used when iterating over all CUs in
1705 expand_symtabs_matching. */
1706 unsigned int mark
: 1;
1708 /* True if we've tried to read the file table and found there isn't one.
1709 There will be no point in trying to read it again next time. */
1710 unsigned int no_file_data
: 1;
1713 /* Hash function for a quick_file_names. */
1716 hash_file_name_entry (const void *e
)
1718 const struct quick_file_names
*file_data
= e
;
1720 return file_data
->offset
;
1723 /* Equality function for a quick_file_names. */
1726 eq_file_name_entry (const void *a
, const void *b
)
1728 const struct quick_file_names
*ea
= a
;
1729 const struct quick_file_names
*eb
= b
;
1731 return ea
->offset
== eb
->offset
;
1734 /* Delete function for a quick_file_names. */
1737 delete_file_name_entry (void *e
)
1739 struct quick_file_names
*file_data
= e
;
1742 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
1744 xfree ((void*) file_data
->file_names
[i
]);
1745 if (file_data
->real_names
)
1746 xfree ((void*) file_data
->real_names
[i
]);
1749 /* The space for the struct itself lives on objfile_obstack,
1750 so we don't free it here. */
1753 /* Create a quick_file_names hash table. */
1756 create_quick_file_names_table (unsigned int nr_initial_entries
)
1758 return htab_create_alloc (nr_initial_entries
,
1759 hash_file_name_entry
, eq_file_name_entry
,
1760 delete_file_name_entry
, xcalloc
, xfree
);
1763 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
1764 have to be created afterwards. You should call age_cached_comp_units after
1765 processing PER_CU->CU. dw2_setup must have been already called. */
1768 load_cu (struct dwarf2_per_cu_data
*per_cu
)
1770 if (per_cu
->debug_types_section
)
1771 load_full_type_unit (per_cu
);
1773 load_full_comp_unit (per_cu
);
1775 gdb_assert (per_cu
->cu
!= NULL
);
1777 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
1780 /* Read in the symbols for PER_CU. */
1783 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
1785 struct cleanup
*back_to
;
1787 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1789 queue_comp_unit (per_cu
);
1795 /* Age the cache, releasing compilation units that have not
1796 been used recently. */
1797 age_cached_comp_units ();
1799 do_cleanups (back_to
);
1802 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1803 the objfile from which this CU came. Returns the resulting symbol
1806 static struct symtab
*
1807 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
1809 if (!per_cu
->v
.quick
->symtab
)
1811 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1812 increment_reading_symtab ();
1813 dw2_do_instantiate_symtab (per_cu
);
1814 do_cleanups (back_to
);
1816 return per_cu
->v
.quick
->symtab
;
1819 /* Return the CU given its index. */
1821 static struct dwarf2_per_cu_data
*
1822 dw2_get_cu (int index
)
1824 if (index
>= dwarf2_per_objfile
->n_comp_units
)
1826 index
-= dwarf2_per_objfile
->n_comp_units
;
1827 return dwarf2_per_objfile
->all_type_units
[index
];
1829 return dwarf2_per_objfile
->all_comp_units
[index
];
1832 /* A helper function that knows how to read a 64-bit value in a way
1833 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1837 extract_cu_value (const char *bytes
, ULONGEST
*result
)
1839 if (sizeof (ULONGEST
) < 8)
1843 /* Ignore the upper 4 bytes if they are all zero. */
1844 for (i
= 0; i
< 4; ++i
)
1845 if (bytes
[i
+ 4] != 0)
1848 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
1851 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
1855 /* Read the CU list from the mapped index, and use it to create all
1856 the CU objects for this objfile. Return 0 if something went wrong,
1857 1 if everything went ok. */
1860 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
1861 offset_type cu_list_elements
)
1865 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
1866 dwarf2_per_objfile
->all_comp_units
1867 = obstack_alloc (&objfile
->objfile_obstack
,
1868 dwarf2_per_objfile
->n_comp_units
1869 * sizeof (struct dwarf2_per_cu_data
*));
1871 for (i
= 0; i
< cu_list_elements
; i
+= 2)
1873 struct dwarf2_per_cu_data
*the_cu
;
1874 ULONGEST offset
, length
;
1876 if (!extract_cu_value (cu_list
, &offset
)
1877 || !extract_cu_value (cu_list
+ 8, &length
))
1881 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1882 struct dwarf2_per_cu_data
);
1883 the_cu
->offset
= offset
;
1884 the_cu
->length
= length
;
1885 the_cu
->objfile
= objfile
;
1886 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1887 struct dwarf2_per_cu_quick_data
);
1888 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
1894 /* Create the signatured type hash table from the index. */
1897 create_signatured_type_table_from_index (struct objfile
*objfile
,
1898 struct dwarf2_section_info
*section
,
1899 const gdb_byte
*bytes
,
1900 offset_type elements
)
1903 htab_t sig_types_hash
;
1905 dwarf2_per_objfile
->n_type_units
= elements
/ 3;
1906 dwarf2_per_objfile
->all_type_units
1907 = obstack_alloc (&objfile
->objfile_obstack
,
1908 dwarf2_per_objfile
->n_type_units
1909 * sizeof (struct dwarf2_per_cu_data
*));
1911 sig_types_hash
= allocate_signatured_type_table (objfile
);
1913 for (i
= 0; i
< elements
; i
+= 3)
1915 struct signatured_type
*type_sig
;
1916 ULONGEST offset
, type_offset
, signature
;
1919 if (!extract_cu_value (bytes
, &offset
)
1920 || !extract_cu_value (bytes
+ 8, &type_offset
))
1922 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
1925 type_sig
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1926 struct signatured_type
);
1927 type_sig
->signature
= signature
;
1928 type_sig
->type_offset
= type_offset
;
1929 type_sig
->per_cu
.debug_types_section
= section
;
1930 type_sig
->per_cu
.offset
= offset
;
1931 type_sig
->per_cu
.objfile
= objfile
;
1932 type_sig
->per_cu
.v
.quick
1933 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1934 struct dwarf2_per_cu_quick_data
);
1936 slot
= htab_find_slot (sig_types_hash
, type_sig
, INSERT
);
1939 dwarf2_per_objfile
->all_type_units
[i
/ 3] = &type_sig
->per_cu
;
1942 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
1947 /* Read the address map data from the mapped index, and use it to
1948 populate the objfile's psymtabs_addrmap. */
1951 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
1953 const gdb_byte
*iter
, *end
;
1954 struct obstack temp_obstack
;
1955 struct addrmap
*mutable_map
;
1956 struct cleanup
*cleanup
;
1959 obstack_init (&temp_obstack
);
1960 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
1961 mutable_map
= addrmap_create_mutable (&temp_obstack
);
1963 iter
= index
->address_table
;
1964 end
= iter
+ index
->address_table_size
;
1966 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1970 ULONGEST hi
, lo
, cu_index
;
1971 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1973 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1975 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
1978 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
1979 dw2_get_cu (cu_index
));
1982 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
1983 &objfile
->objfile_obstack
);
1984 do_cleanups (cleanup
);
1987 /* The hash function for strings in the mapped index. This is the same as
1988 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the
1989 implementation. This is necessary because the hash function is tied to the
1990 format of the mapped index file. The hash values do not have to match with
1993 Use INT_MAX for INDEX_VERSION if you generate the current index format. */
1996 mapped_index_string_hash (int index_version
, const void *p
)
1998 const unsigned char *str
= (const unsigned char *) p
;
2002 while ((c
= *str
++) != 0)
2004 if (index_version
>= 5)
2006 r
= r
* 67 + c
- 113;
2012 /* Find a slot in the mapped index INDEX for the object named NAME.
2013 If NAME is found, set *VEC_OUT to point to the CU vector in the
2014 constant pool and return 1. If NAME cannot be found, return 0. */
2017 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2018 offset_type
**vec_out
)
2020 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2022 offset_type slot
, step
;
2023 int (*cmp
) (const char *, const char *);
2025 if (current_language
->la_language
== language_cplus
2026 || current_language
->la_language
== language_java
2027 || current_language
->la_language
== language_fortran
)
2029 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2031 const char *paren
= strchr (name
, '(');
2037 dup
= xmalloc (paren
- name
+ 1);
2038 memcpy (dup
, name
, paren
- name
);
2039 dup
[paren
- name
] = 0;
2041 make_cleanup (xfree
, dup
);
2046 /* Index version 4 did not support case insensitive searches. But the
2047 indices for case insensitive languages are built in lowercase, therefore
2048 simulate our NAME being searched is also lowercased. */
2049 hash
= mapped_index_string_hash ((index
->version
== 4
2050 && case_sensitivity
== case_sensitive_off
2051 ? 5 : index
->version
),
2054 slot
= hash
& (index
->symbol_table_slots
- 1);
2055 step
= ((hash
* 17) & (index
->symbol_table_slots
- 1)) | 1;
2056 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2060 /* Convert a slot number to an offset into the table. */
2061 offset_type i
= 2 * slot
;
2063 if (index
->symbol_table
[i
] == 0 && index
->symbol_table
[i
+ 1] == 0)
2065 do_cleanups (back_to
);
2069 str
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[i
]);
2070 if (!cmp (name
, str
))
2072 *vec_out
= (offset_type
*) (index
->constant_pool
2073 + MAYBE_SWAP (index
->symbol_table
[i
+ 1]));
2074 do_cleanups (back_to
);
2078 slot
= (slot
+ step
) & (index
->symbol_table_slots
- 1);
2082 /* Read the index file. If everything went ok, initialize the "quick"
2083 elements of all the CUs and return 1. Otherwise, return 0. */
2086 dwarf2_read_index (struct objfile
*objfile
)
2089 struct mapped_index
*map
;
2090 offset_type
*metadata
;
2091 const gdb_byte
*cu_list
;
2092 const gdb_byte
*types_list
= NULL
;
2093 offset_type version
, cu_list_elements
;
2094 offset_type types_list_elements
= 0;
2097 if (dwarf2_section_empty_p (&dwarf2_per_objfile
->gdb_index
))
2100 /* Older elfutils strip versions could keep the section in the main
2101 executable while splitting it for the separate debug info file. */
2102 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
2103 & SEC_HAS_CONTENTS
) == 0)
2106 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
2108 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
2109 /* Version check. */
2110 version
= MAYBE_SWAP (*(offset_type
*) addr
);
2111 /* Versions earlier than 3 emitted every copy of a psymbol. This
2112 causes the index to behave very poorly for certain requests. Version 3
2113 contained incomplete addrmap. So, it seems better to just ignore such
2114 indices. Index version 4 uses a different hash function than index
2115 version 5 and later. */
2118 /* Indices with higher version than the one supported by GDB may be no
2119 longer backward compatible. */
2123 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
2124 map
->version
= version
;
2125 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
2127 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
2130 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2131 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
2135 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
2136 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
2137 - MAYBE_SWAP (metadata
[i
]))
2141 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
2142 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
2143 - MAYBE_SWAP (metadata
[i
]));
2146 map
->symbol_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
2147 map
->symbol_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
2148 - MAYBE_SWAP (metadata
[i
]))
2149 / (2 * sizeof (offset_type
)));
2152 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
2154 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
2157 if (types_list_elements
)
2159 struct dwarf2_section_info
*section
;
2161 /* We can only handle a single .debug_types when we have an
2163 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
2166 section
= VEC_index (dwarf2_section_info_def
,
2167 dwarf2_per_objfile
->types
, 0);
2169 if (!create_signatured_type_table_from_index (objfile
, section
,
2171 types_list_elements
))
2175 create_addrmap_from_index (objfile
, map
);
2177 dwarf2_per_objfile
->index_table
= map
;
2178 dwarf2_per_objfile
->using_index
= 1;
2179 dwarf2_per_objfile
->quick_file_names_table
=
2180 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2185 /* A helper for the "quick" functions which sets the global
2186 dwarf2_per_objfile according to OBJFILE. */
2189 dw2_setup (struct objfile
*objfile
)
2191 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
2192 gdb_assert (dwarf2_per_objfile
);
2195 /* A helper for the "quick" functions which attempts to read the line
2196 table for THIS_CU. */
2198 static struct quick_file_names
*
2199 dw2_get_file_names (struct objfile
*objfile
,
2200 struct dwarf2_per_cu_data
*this_cu
)
2202 bfd
*abfd
= objfile
->obfd
;
2203 struct line_header
*lh
;
2204 struct attribute
*attr
;
2205 struct cleanup
*cleanups
;
2206 struct die_info
*comp_unit_die
;
2207 struct dwarf2_section_info
* sec
;
2209 int has_children
, i
;
2210 struct dwarf2_cu cu
;
2211 unsigned int bytes_read
;
2212 struct die_reader_specs reader_specs
;
2213 char *name
, *comp_dir
;
2215 struct quick_file_names
*qfn
;
2216 unsigned int line_offset
;
2218 if (this_cu
->v
.quick
->file_names
!= NULL
)
2219 return this_cu
->v
.quick
->file_names
;
2220 /* If we know there is no line data, no point in looking again. */
2221 if (this_cu
->v
.quick
->no_file_data
)
2224 init_one_comp_unit (&cu
, this_cu
);
2225 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2227 if (this_cu
->debug_types_section
)
2228 sec
= this_cu
->debug_types_section
;
2230 sec
= &dwarf2_per_objfile
->info
;
2231 dwarf2_read_section (objfile
, sec
);
2232 info_ptr
= sec
->buffer
+ this_cu
->offset
;
2234 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, sec
, info_ptr
,
2235 this_cu
->debug_types_section
!= NULL
);
2237 /* Skip dummy compilation units. */
2238 if (info_ptr
>= (sec
->buffer
+ sec
->size
)
2239 || peek_abbrev_code (abfd
, info_ptr
) == 0)
2241 do_cleanups (cleanups
);
2245 dwarf2_read_abbrevs (&cu
);
2246 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2248 init_cu_die_reader (&reader_specs
, &cu
);
2249 read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2255 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2258 struct quick_file_names find_entry
;
2260 line_offset
= DW_UNSND (attr
);
2262 /* We may have already read in this line header (TU line header sharing).
2263 If we have we're done. */
2264 find_entry
.offset
= line_offset
;
2265 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
2266 &find_entry
, INSERT
);
2269 do_cleanups (cleanups
);
2270 this_cu
->v
.quick
->file_names
= *slot
;
2274 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2278 do_cleanups (cleanups
);
2279 this_cu
->v
.quick
->no_file_data
= 1;
2283 qfn
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*qfn
));
2284 qfn
->offset
= line_offset
;
2285 gdb_assert (slot
!= NULL
);
2288 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2290 qfn
->num_file_names
= lh
->num_file_names
;
2291 qfn
->file_names
= obstack_alloc (&objfile
->objfile_obstack
,
2292 lh
->num_file_names
* sizeof (char *));
2293 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2294 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2295 qfn
->real_names
= NULL
;
2297 free_line_header (lh
);
2298 do_cleanups (cleanups
);
2300 this_cu
->v
.quick
->file_names
= qfn
;
2304 /* A helper for the "quick" functions which computes and caches the
2305 real path for a given file name from the line table. */
2308 dw2_get_real_path (struct objfile
*objfile
,
2309 struct quick_file_names
*qfn
, int index
)
2311 if (qfn
->real_names
== NULL
)
2312 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2313 qfn
->num_file_names
, sizeof (char *));
2315 if (qfn
->real_names
[index
] == NULL
)
2316 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]);
2318 return qfn
->real_names
[index
];
2321 static struct symtab
*
2322 dw2_find_last_source_symtab (struct objfile
*objfile
)
2326 dw2_setup (objfile
);
2327 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2328 return dw2_instantiate_symtab (dw2_get_cu (index
));
2331 /* Traversal function for dw2_forget_cached_source_info. */
2334 dw2_free_cached_file_names (void **slot
, void *info
)
2336 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
2338 if (file_data
->real_names
)
2342 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2344 xfree ((void*) file_data
->real_names
[i
]);
2345 file_data
->real_names
[i
] = NULL
;
2353 dw2_forget_cached_source_info (struct objfile
*objfile
)
2355 dw2_setup (objfile
);
2357 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
2358 dw2_free_cached_file_names
, NULL
);
2361 /* Helper function for dw2_map_symtabs_matching_filename that expands
2362 the symtabs and calls the iterator. */
2365 dw2_map_expand_apply (struct objfile
*objfile
,
2366 struct dwarf2_per_cu_data
*per_cu
,
2368 const char *full_path
, const char *real_path
,
2369 int (*callback
) (struct symtab
*, void *),
2372 struct symtab
*last_made
= objfile
->symtabs
;
2374 /* Don't visit already-expanded CUs. */
2375 if (per_cu
->v
.quick
->symtab
)
2378 /* This may expand more than one symtab, and we want to iterate over
2380 dw2_instantiate_symtab (per_cu
);
2382 return iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
2383 objfile
->symtabs
, last_made
);
2386 /* Implementation of the map_symtabs_matching_filename method. */
2389 dw2_map_symtabs_matching_filename (struct objfile
*objfile
, const char *name
,
2390 const char *full_path
, const char *real_path
,
2391 int (*callback
) (struct symtab
*, void *),
2395 const char *name_basename
= lbasename (name
);
2396 int name_len
= strlen (name
);
2397 int is_abs
= IS_ABSOLUTE_PATH (name
);
2399 dw2_setup (objfile
);
2401 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2402 + dwarf2_per_objfile
->n_type_units
); ++i
)
2405 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2406 struct quick_file_names
*file_data
;
2408 /* We only need to look at symtabs not already expanded. */
2409 if (per_cu
->v
.quick
->symtab
)
2412 file_data
= dw2_get_file_names (objfile
, per_cu
);
2413 if (file_data
== NULL
)
2416 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2418 const char *this_name
= file_data
->file_names
[j
];
2420 if (FILENAME_CMP (name
, this_name
) == 0
2421 || (!is_abs
&& compare_filenames_for_search (this_name
,
2424 if (dw2_map_expand_apply (objfile
, per_cu
,
2425 name
, full_path
, real_path
,
2430 /* Before we invoke realpath, which can get expensive when many
2431 files are involved, do a quick comparison of the basenames. */
2432 if (! basenames_may_differ
2433 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
2436 if (full_path
!= NULL
)
2438 const char *this_real_name
= dw2_get_real_path (objfile
,
2441 if (this_real_name
!= NULL
2442 && (FILENAME_CMP (full_path
, this_real_name
) == 0
2444 && compare_filenames_for_search (this_real_name
,
2447 if (dw2_map_expand_apply (objfile
, per_cu
,
2448 name
, full_path
, real_path
,
2454 if (real_path
!= NULL
)
2456 const char *this_real_name
= dw2_get_real_path (objfile
,
2459 if (this_real_name
!= NULL
2460 && (FILENAME_CMP (real_path
, this_real_name
) == 0
2462 && compare_filenames_for_search (this_real_name
,
2465 if (dw2_map_expand_apply (objfile
, per_cu
,
2466 name
, full_path
, real_path
,
2477 static struct symtab
*
2478 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2479 const char *name
, domain_enum domain
)
2481 /* We do all the work in the pre_expand_symtabs_matching hook
2486 /* A helper function that expands all symtabs that hold an object
2490 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2492 dw2_setup (objfile
);
2494 /* index_table is NULL if OBJF_READNOW. */
2495 if (dwarf2_per_objfile
->index_table
)
2499 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2502 offset_type i
, len
= MAYBE_SWAP (*vec
);
2503 for (i
= 0; i
< len
; ++i
)
2505 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2506 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2508 dw2_instantiate_symtab (per_cu
);
2515 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2516 enum block_enum block_kind
, const char *name
,
2519 dw2_do_expand_symtabs_matching (objfile
, name
);
2523 dw2_print_stats (struct objfile
*objfile
)
2527 dw2_setup (objfile
);
2529 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2530 + dwarf2_per_objfile
->n_type_units
); ++i
)
2532 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2534 if (!per_cu
->v
.quick
->symtab
)
2537 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2541 dw2_dump (struct objfile
*objfile
)
2543 /* Nothing worth printing. */
2547 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2548 struct section_offsets
*delta
)
2550 /* There's nothing to relocate here. */
2554 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2555 const char *func_name
)
2557 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2561 dw2_expand_all_symtabs (struct objfile
*objfile
)
2565 dw2_setup (objfile
);
2567 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2568 + dwarf2_per_objfile
->n_type_units
); ++i
)
2570 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2572 dw2_instantiate_symtab (per_cu
);
2577 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2578 const char *filename
)
2582 dw2_setup (objfile
);
2584 /* We don't need to consider type units here.
2585 This is only called for examining code, e.g. expand_line_sal.
2586 There can be an order of magnitude (or more) more type units
2587 than comp units, and we avoid them if we can. */
2589 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
2592 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2593 struct quick_file_names
*file_data
;
2595 /* We only need to look at symtabs not already expanded. */
2596 if (per_cu
->v
.quick
->symtab
)
2599 file_data
= dw2_get_file_names (objfile
, per_cu
);
2600 if (file_data
== NULL
)
2603 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2605 const char *this_name
= file_data
->file_names
[j
];
2606 if (FILENAME_CMP (this_name
, filename
) == 0)
2608 dw2_instantiate_symtab (per_cu
);
2616 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2618 struct dwarf2_per_cu_data
*per_cu
;
2620 struct quick_file_names
*file_data
;
2622 dw2_setup (objfile
);
2624 /* index_table is NULL if OBJF_READNOW. */
2625 if (!dwarf2_per_objfile
->index_table
)
2629 ALL_OBJFILE_SYMTABS (objfile
, s
)
2632 struct blockvector
*bv
= BLOCKVECTOR (s
);
2633 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2634 struct symbol
*sym
= lookup_block_symbol (block
, name
, VAR_DOMAIN
);
2637 return sym
->symtab
->filename
;
2642 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2646 /* Note that this just looks at the very first one named NAME -- but
2647 actually we are looking for a function. find_main_filename
2648 should be rewritten so that it doesn't require a custom hook. It
2649 could just use the ordinary symbol tables. */
2650 /* vec[0] is the length, which must always be >0. */
2651 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2653 file_data
= dw2_get_file_names (objfile
, per_cu
);
2654 if (file_data
== NULL
)
2657 return file_data
->file_names
[file_data
->num_file_names
- 1];
2661 dw2_map_matching_symbols (const char * name
, domain_enum
namespace,
2662 struct objfile
*objfile
, int global
,
2663 int (*callback
) (struct block
*,
2664 struct symbol
*, void *),
2665 void *data
, symbol_compare_ftype
*match
,
2666 symbol_compare_ftype
*ordered_compare
)
2668 /* Currently unimplemented; used for Ada. The function can be called if the
2669 current language is Ada for a non-Ada objfile using GNU index. As Ada
2670 does not look for non-Ada symbols this function should just return. */
2674 dw2_expand_symtabs_matching
2675 (struct objfile
*objfile
,
2676 int (*file_matcher
) (const char *, void *),
2677 int (*name_matcher
) (const char *, void *),
2678 enum search_domain kind
,
2683 struct mapped_index
*index
;
2685 dw2_setup (objfile
);
2687 /* index_table is NULL if OBJF_READNOW. */
2688 if (!dwarf2_per_objfile
->index_table
)
2690 index
= dwarf2_per_objfile
->index_table
;
2692 if (file_matcher
!= NULL
)
2694 struct cleanup
*cleanup
;
2695 htab_t visited_found
, visited_not_found
;
2697 visited_found
= htab_create_alloc (10,
2698 htab_hash_pointer
, htab_eq_pointer
,
2699 NULL
, xcalloc
, xfree
);
2700 cleanup
= make_cleanup_htab_delete (visited_found
);
2701 visited_not_found
= htab_create_alloc (10,
2702 htab_hash_pointer
, htab_eq_pointer
,
2703 NULL
, xcalloc
, xfree
);
2704 make_cleanup_htab_delete (visited_not_found
);
2706 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2707 + dwarf2_per_objfile
->n_type_units
); ++i
)
2710 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2711 struct quick_file_names
*file_data
;
2714 per_cu
->v
.quick
->mark
= 0;
2716 /* We only need to look at symtabs not already expanded. */
2717 if (per_cu
->v
.quick
->symtab
)
2720 file_data
= dw2_get_file_names (objfile
, per_cu
);
2721 if (file_data
== NULL
)
2724 if (htab_find (visited_not_found
, file_data
) != NULL
)
2726 else if (htab_find (visited_found
, file_data
) != NULL
)
2728 per_cu
->v
.quick
->mark
= 1;
2732 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2734 if (file_matcher (file_data
->file_names
[j
], data
))
2736 per_cu
->v
.quick
->mark
= 1;
2741 slot
= htab_find_slot (per_cu
->v
.quick
->mark
2743 : visited_not_found
,
2748 do_cleanups (cleanup
);
2751 for (iter
= 0; iter
< index
->symbol_table_slots
; ++iter
)
2753 offset_type idx
= 2 * iter
;
2755 offset_type
*vec
, vec_len
, vec_idx
;
2757 if (index
->symbol_table
[idx
] == 0 && index
->symbol_table
[idx
+ 1] == 0)
2760 name
= index
->constant_pool
+ MAYBE_SWAP (index
->symbol_table
[idx
]);
2762 if (! (*name_matcher
) (name
, data
))
2765 /* The name was matched, now expand corresponding CUs that were
2767 vec
= (offset_type
*) (index
->constant_pool
2768 + MAYBE_SWAP (index
->symbol_table
[idx
+ 1]));
2769 vec_len
= MAYBE_SWAP (vec
[0]);
2770 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2772 struct dwarf2_per_cu_data
*per_cu
;
2774 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2775 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
2776 dw2_instantiate_symtab (per_cu
);
2781 static struct symtab
*
2782 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2783 struct minimal_symbol
*msymbol
,
2785 struct obj_section
*section
,
2788 struct dwarf2_per_cu_data
*data
;
2790 dw2_setup (objfile
);
2792 if (!objfile
->psymtabs_addrmap
)
2795 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2799 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2800 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2801 paddress (get_objfile_arch (objfile
), pc
));
2803 return dw2_instantiate_symtab (data
);
2807 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
2808 void *data
, int need_fullname
)
2811 struct cleanup
*cleanup
;
2812 htab_t visited
= htab_create_alloc (10, htab_hash_pointer
, htab_eq_pointer
,
2813 NULL
, xcalloc
, xfree
);
2815 cleanup
= make_cleanup_htab_delete (visited
);
2816 dw2_setup (objfile
);
2818 /* We can ignore file names coming from already-expanded CUs. */
2819 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2820 + dwarf2_per_objfile
->n_type_units
); ++i
)
2822 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2824 if (per_cu
->v
.quick
->symtab
)
2826 void **slot
= htab_find_slot (visited
, per_cu
->v
.quick
->file_names
,
2829 *slot
= per_cu
->v
.quick
->file_names
;
2833 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2834 + dwarf2_per_objfile
->n_type_units
); ++i
)
2837 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2838 struct quick_file_names
*file_data
;
2841 /* We only need to look at symtabs not already expanded. */
2842 if (per_cu
->v
.quick
->symtab
)
2845 file_data
= dw2_get_file_names (objfile
, per_cu
);
2846 if (file_data
== NULL
)
2849 slot
= htab_find_slot (visited
, file_data
, INSERT
);
2852 /* Already visited. */
2857 for (j
= 0; j
< file_data
->num_file_names
; ++j
)
2859 const char *this_real_name
;
2862 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
2864 this_real_name
= NULL
;
2865 (*fun
) (file_data
->file_names
[j
], this_real_name
, data
);
2869 do_cleanups (cleanup
);
2873 dw2_has_symbols (struct objfile
*objfile
)
2878 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2881 dw2_find_last_source_symtab
,
2882 dw2_forget_cached_source_info
,
2883 dw2_map_symtabs_matching_filename
,
2885 dw2_pre_expand_symtabs_matching
,
2889 dw2_expand_symtabs_for_function
,
2890 dw2_expand_all_symtabs
,
2891 dw2_expand_symtabs_with_filename
,
2892 dw2_find_symbol_file
,
2893 dw2_map_matching_symbols
,
2894 dw2_expand_symtabs_matching
,
2895 dw2_find_pc_sect_symtab
,
2896 dw2_map_symbol_filenames
2899 /* Initialize for reading DWARF for this objfile. Return 0 if this
2900 file will use psymtabs, or 1 if using the GNU index. */
2903 dwarf2_initialize_objfile (struct objfile
*objfile
)
2905 /* If we're about to read full symbols, don't bother with the
2906 indices. In this case we also don't care if some other debug
2907 format is making psymtabs, because they are all about to be
2909 if ((objfile
->flags
& OBJF_READNOW
))
2913 dwarf2_per_objfile
->using_index
= 1;
2914 create_all_comp_units (objfile
);
2915 create_debug_types_hash_table (objfile
);
2916 dwarf2_per_objfile
->quick_file_names_table
=
2917 create_quick_file_names_table (dwarf2_per_objfile
->n_comp_units
);
2919 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2920 + dwarf2_per_objfile
->n_type_units
); ++i
)
2922 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2924 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2925 struct dwarf2_per_cu_quick_data
);
2928 /* Return 1 so that gdb sees the "quick" functions. However,
2929 these functions will be no-ops because we will have expanded
2934 if (dwarf2_read_index (objfile
))
2942 /* Build a partial symbol table. */
2945 dwarf2_build_psymtabs (struct objfile
*objfile
)
2947 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2949 init_psymbol_list (objfile
, 1024);
2952 dwarf2_build_psymtabs_hard (objfile
);
2955 /* Return TRUE if OFFSET is within CU_HEADER. */
2958 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2960 unsigned int bottom
= cu_header
->offset
;
2961 unsigned int top
= (cu_header
->offset
2963 + cu_header
->initial_length_size
);
2965 return (offset
>= bottom
&& offset
< top
);
2968 /* Read in the comp unit header information from the debug_info at info_ptr.
2969 NOTE: This leaves members offset, first_die_offset to be filled in
2973 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2974 gdb_byte
*info_ptr
, bfd
*abfd
)
2977 unsigned int bytes_read
;
2979 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2980 cu_header
->initial_length_size
= bytes_read
;
2981 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2982 info_ptr
+= bytes_read
;
2983 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2985 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2987 info_ptr
+= bytes_read
;
2988 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2990 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2991 if (signed_addr
< 0)
2992 internal_error (__FILE__
, __LINE__
,
2993 _("read_comp_unit_head: dwarf from non elf file"));
2994 cu_header
->signed_addr_p
= signed_addr
;
2999 /* Subroutine of read_and_check_comp_unit_head and
3000 read_and_check_type_unit_head to simplify them.
3001 Perform various error checking on the header. */
3004 error_check_comp_unit_head (struct comp_unit_head
*header
,
3005 struct dwarf2_section_info
*section
)
3007 bfd
*abfd
= section
->asection
->owner
;
3008 const char *filename
= bfd_get_filename (abfd
);
3010 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
3011 error (_("Dwarf Error: wrong version in compilation unit header "
3012 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
3015 if (header
->abbrev_offset
3016 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
,
3017 &dwarf2_per_objfile
->abbrev
))
3018 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
3019 "(offset 0x%lx + 6) [in module %s]"),
3020 (long) header
->abbrev_offset
, (long) header
->offset
,
3023 /* Cast to unsigned long to use 64-bit arithmetic when possible to
3024 avoid potential 32-bit overflow. */
3025 if (((unsigned long) header
->offset
3026 + header
->length
+ header
->initial_length_size
)
3028 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
3029 "(offset 0x%lx + 0) [in module %s]"),
3030 (long) header
->length
, (long) header
->offset
,
3034 /* Read in a CU/TU header and perform some basic error checking.
3035 The contents of the header are stored in HEADER.
3036 The result is a pointer to the start of the first DIE. */
3039 read_and_check_comp_unit_head (struct comp_unit_head
*header
,
3040 struct dwarf2_section_info
*section
,
3042 int is_debug_types_section
)
3044 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3045 bfd
*abfd
= section
->asection
->owner
;
3047 header
->offset
= beg_of_comp_unit
- section
->buffer
;
3049 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3051 /* If we're reading a type unit, skip over the signature and
3052 type_offset fields. */
3053 if (is_debug_types_section
)
3054 info_ptr
+= 8 /*signature*/ + header
->offset_size
;
3056 header
->first_die_offset
= info_ptr
- beg_of_comp_unit
;
3058 error_check_comp_unit_head (header
, section
);
3063 /* Read in the types comp unit header information from .debug_types entry at
3064 types_ptr. The result is a pointer to one past the end of the header. */
3067 read_and_check_type_unit_head (struct comp_unit_head
*header
,
3068 struct dwarf2_section_info
*section
,
3070 ULONGEST
*signature
, unsigned int *type_offset
)
3072 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3073 bfd
*abfd
= section
->asection
->owner
;
3075 header
->offset
= beg_of_comp_unit
- section
->buffer
;
3077 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
3079 /* If we're reading a type unit, skip over the signature and
3080 type_offset fields. */
3081 if (signature
!= NULL
)
3082 *signature
= read_8_bytes (abfd
, info_ptr
);
3084 if (type_offset
!= NULL
)
3085 *type_offset
= read_offset_1 (abfd
, info_ptr
, header
->offset_size
);
3086 info_ptr
+= header
->offset_size
;
3088 header
->first_die_offset
= info_ptr
- beg_of_comp_unit
;
3090 error_check_comp_unit_head (header
, section
);
3095 /* Allocate a new partial symtab for file named NAME and mark this new
3096 partial symtab as being an include of PST. */
3099 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
3100 struct objfile
*objfile
)
3102 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
3104 subpst
->section_offsets
= pst
->section_offsets
;
3105 subpst
->textlow
= 0;
3106 subpst
->texthigh
= 0;
3108 subpst
->dependencies
= (struct partial_symtab
**)
3109 obstack_alloc (&objfile
->objfile_obstack
,
3110 sizeof (struct partial_symtab
*));
3111 subpst
->dependencies
[0] = pst
;
3112 subpst
->number_of_dependencies
= 1;
3114 subpst
->globals_offset
= 0;
3115 subpst
->n_global_syms
= 0;
3116 subpst
->statics_offset
= 0;
3117 subpst
->n_static_syms
= 0;
3118 subpst
->symtab
= NULL
;
3119 subpst
->read_symtab
= pst
->read_symtab
;
3122 /* No private part is necessary for include psymtabs. This property
3123 can be used to differentiate between such include psymtabs and
3124 the regular ones. */
3125 subpst
->read_symtab_private
= NULL
;
3128 /* Read the Line Number Program data and extract the list of files
3129 included by the source file represented by PST. Build an include
3130 partial symtab for each of these included files. */
3133 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
3134 struct die_info
*die
,
3135 struct partial_symtab
*pst
)
3137 struct objfile
*objfile
= cu
->objfile
;
3138 bfd
*abfd
= objfile
->obfd
;
3139 struct line_header
*lh
= NULL
;
3140 struct attribute
*attr
;
3142 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3145 unsigned int line_offset
= DW_UNSND (attr
);
3147 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3150 return; /* No linetable, so no includes. */
3152 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
3153 dwarf_decode_lines (lh
, pst
->dirname
, cu
, pst
, 1);
3155 free_line_header (lh
);
3159 hash_type_signature (const void *item
)
3161 const struct signatured_type
*type_sig
= item
;
3163 /* This drops the top 32 bits of the signature, but is ok for a hash. */
3164 return type_sig
->signature
;
3168 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
3170 const struct signatured_type
*lhs
= item_lhs
;
3171 const struct signatured_type
*rhs
= item_rhs
;
3173 return lhs
->signature
== rhs
->signature
;
3176 /* Allocate a hash table for signatured types. */
3179 allocate_signatured_type_table (struct objfile
*objfile
)
3181 return htab_create_alloc_ex (41,
3182 hash_type_signature
,
3185 &objfile
->objfile_obstack
,
3186 hashtab_obstack_allocate
,
3187 dummy_obstack_deallocate
);
3190 /* A helper function to add a signatured type CU to a table. */
3193 add_signatured_type_cu_to_table (void **slot
, void *datum
)
3195 struct signatured_type
*sigt
= *slot
;
3196 struct dwarf2_per_cu_data
***datap
= datum
;
3198 **datap
= &sigt
->per_cu
;
3204 /* Create the hash table of all entries in the .debug_types section(s).
3205 The result is zero if there is an error (e.g. missing .debug_types section),
3206 otherwise non-zero. */
3209 create_debug_types_hash_table (struct objfile
*objfile
)
3211 htab_t types_htab
= NULL
;
3212 struct dwarf2_per_cu_data
**iter
;
3214 struct dwarf2_section_info
*section
;
3216 if (VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
))
3218 dwarf2_per_objfile
->signatured_types
= NULL
;
3223 VEC_iterate (dwarf2_section_info_def
, dwarf2_per_objfile
->types
,
3227 gdb_byte
*info_ptr
, *end_ptr
;
3229 dwarf2_read_section (objfile
, section
);
3230 info_ptr
= section
->buffer
;
3232 if (info_ptr
== NULL
)
3235 if (types_htab
== NULL
)
3236 types_htab
= allocate_signatured_type_table (objfile
);
3238 if (dwarf2_die_debug
)
3239 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
3241 end_ptr
= info_ptr
+ section
->size
;
3242 while (info_ptr
< end_ptr
)
3244 unsigned int offset
;
3245 unsigned int type_offset
;
3247 struct signatured_type
*type_sig
;
3249 gdb_byte
*ptr
= info_ptr
;
3250 struct comp_unit_head header
;
3252 offset
= ptr
- section
->buffer
;
3254 /* We need to read the type's signature in order to build the hash
3255 table, but we don't need anything else just yet. */
3257 ptr
= read_and_check_type_unit_head (&header
, section
, ptr
,
3258 &signature
, &type_offset
);
3260 /* Skip dummy type units. */
3261 if (ptr
>= end_ptr
|| peek_abbrev_code (objfile
->obfd
, ptr
) == 0)
3263 info_ptr
= info_ptr
+ header
.initial_length_size
+ header
.length
;
3267 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
3268 memset (type_sig
, 0, sizeof (*type_sig
));
3269 type_sig
->signature
= signature
;
3270 type_sig
->type_offset
= type_offset
;
3271 type_sig
->per_cu
.objfile
= objfile
;
3272 type_sig
->per_cu
.debug_types_section
= section
;
3273 type_sig
->per_cu
.offset
= offset
;
3275 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
3276 gdb_assert (slot
!= NULL
);
3279 const struct signatured_type
*dup_sig
= *slot
;
3281 complaint (&symfile_complaints
,
3282 _("debug type entry at offset 0x%x is duplicate to the "
3283 "entry at offset 0x%x, signature 0x%s"),
3284 offset
, dup_sig
->per_cu
.offset
,
3285 phex (signature
, sizeof (signature
)));
3286 gdb_assert (signature
== dup_sig
->signature
);
3290 if (dwarf2_die_debug
)
3291 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
3292 offset
, phex (signature
, sizeof (signature
)));
3294 info_ptr
= info_ptr
+ header
.initial_length_size
+ header
.length
;
3298 dwarf2_per_objfile
->signatured_types
= types_htab
;
3300 dwarf2_per_objfile
->n_type_units
= htab_elements (types_htab
);
3301 dwarf2_per_objfile
->all_type_units
3302 = obstack_alloc (&objfile
->objfile_obstack
,
3303 dwarf2_per_objfile
->n_type_units
3304 * sizeof (struct dwarf2_per_cu_data
*));
3305 iter
= &dwarf2_per_objfile
->all_type_units
[0];
3306 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
, &iter
);
3307 gdb_assert (iter
- &dwarf2_per_objfile
->all_type_units
[0]
3308 == dwarf2_per_objfile
->n_type_units
);
3313 /* Lookup a signature based type.
3314 Returns NULL if SIG is not present in the table. */
3316 static struct signatured_type
*
3317 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
3319 struct signatured_type find_entry
, *entry
;
3321 if (dwarf2_per_objfile
->signatured_types
== NULL
)
3323 complaint (&symfile_complaints
,
3324 _("missing `.debug_types' section for DW_FORM_ref_sig8 die"));
3328 find_entry
.signature
= sig
;
3329 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
3333 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
3336 init_cu_die_reader (struct die_reader_specs
*reader
,
3337 struct dwarf2_cu
*cu
)
3339 reader
->abfd
= cu
->objfile
->obfd
;
3341 if (cu
->per_cu
->debug_types_section
)
3343 gdb_assert (cu
->per_cu
->debug_types_section
->readin
);
3344 reader
->buffer
= cu
->per_cu
->debug_types_section
->buffer
;
3348 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3349 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
3353 /* Find the base address of the compilation unit for range lists and
3354 location lists. It will normally be specified by DW_AT_low_pc.
3355 In DWARF-3 draft 4, the base address could be overridden by
3356 DW_AT_entry_pc. It's been removed, but GCC still uses this for
3357 compilation units with discontinuous ranges. */
3360 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
3362 struct attribute
*attr
;
3365 cu
->base_address
= 0;
3367 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
3370 cu
->base_address
= DW_ADDR (attr
);
3375 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3378 cu
->base_address
= DW_ADDR (attr
);
3384 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
3385 to combine the common parts.
3386 Process compilation unit THIS_CU for a psymtab.
3387 SECTION is the section the CU/TU comes from,
3388 either .debug_info or .debug_types. */
3391 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3392 struct dwarf2_section_info
*section
,
3393 int is_debug_types_section
)
3395 struct objfile
*objfile
= this_cu
->objfile
;
3396 bfd
*abfd
= objfile
->obfd
;
3397 gdb_byte
*buffer
= section
->buffer
;
3398 gdb_byte
*info_ptr
= buffer
+ this_cu
->offset
;
3399 unsigned int buffer_size
= section
->size
;
3400 gdb_byte
*beg_of_comp_unit
= info_ptr
;
3401 struct die_info
*comp_unit_die
;
3402 struct partial_symtab
*pst
;
3404 struct cleanup
*back_to_inner
;
3405 struct dwarf2_cu cu
;
3406 int has_children
, has_pc_info
;
3407 struct attribute
*attr
;
3408 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3409 struct die_reader_specs reader_specs
;
3410 const char *filename
;
3412 /* If this compilation unit was already read in, free the
3413 cached copy in order to read it in again. This is
3414 necessary because we skipped some symbols when we first
3415 read in the compilation unit (see load_partial_dies).
3416 This problem could be avoided, but the benefit is
3418 if (this_cu
->cu
!= NULL
)
3419 free_one_cached_comp_unit (this_cu
->cu
);
3421 /* Note that this is a pointer to our stack frame, being
3422 added to a global data structure. It will be cleaned up
3423 in free_stack_comp_unit when we finish with this
3424 compilation unit. */
3425 init_one_comp_unit (&cu
, this_cu
);
3426 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3428 info_ptr
= read_and_check_comp_unit_head (&cu
.header
, section
, info_ptr
,
3429 is_debug_types_section
);
3431 /* Skip dummy compilation units. */
3432 if (info_ptr
>= buffer
+ buffer_size
3433 || peek_abbrev_code (abfd
, info_ptr
) == 0)
3435 do_cleanups (back_to_inner
);
3439 cu
.list_in_scope
= &file_symbols
;
3441 /* Read the abbrevs for this compilation unit into a table. */
3442 dwarf2_read_abbrevs (&cu
);
3443 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3445 /* Read the compilation unit die. */
3446 init_cu_die_reader (&reader_specs
, &cu
);
3447 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3450 if (is_debug_types_section
)
3452 /* LENGTH has not been set yet for type units. */
3453 gdb_assert (this_cu
->offset
== cu
.header
.offset
);
3454 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3456 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3458 do_cleanups (back_to_inner
);
3462 prepare_one_comp_unit (&cu
, comp_unit_die
);
3464 /* Allocate a new partial symbol table structure. */
3465 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3466 if (attr
== NULL
|| !DW_STRING (attr
))
3469 filename
= DW_STRING (attr
);
3470 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3472 /* TEXTLOW and TEXTHIGH are set below. */
3474 objfile
->global_psymbols
.next
,
3475 objfile
->static_psymbols
.next
);
3476 pst
->psymtabs_addrmap_supported
= 1;
3478 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3480 pst
->dirname
= DW_STRING (attr
);
3482 pst
->read_symtab_private
= this_cu
;
3484 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3486 /* Store the function that reads in the rest of the symbol table. */
3487 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3489 this_cu
->v
.psymtab
= pst
;
3491 dwarf2_find_base_address (comp_unit_die
, &cu
);
3493 /* Possibly set the default values of LOWPC and HIGHPC from
3495 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3496 &best_highpc
, &cu
, pst
);
3497 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3498 /* Store the contiguous range if it is not empty; it can be empty for
3499 CUs with no code. */
3500 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3501 best_lowpc
+ baseaddr
,
3502 best_highpc
+ baseaddr
- 1, pst
);
3504 /* Check if comp unit has_children.
3505 If so, read the rest of the partial symbols from this comp unit.
3506 If not, there's no more debug_info for this comp unit. */
3509 struct partial_die_info
*first_die
;
3510 CORE_ADDR lowpc
, highpc
;
3512 lowpc
= ((CORE_ADDR
) -1);
3513 highpc
= ((CORE_ADDR
) 0);
3515 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3517 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3518 ! has_pc_info
, &cu
);
3520 /* If we didn't find a lowpc, set it to highpc to avoid
3521 complaints from `maint check'. */
3522 if (lowpc
== ((CORE_ADDR
) -1))
3525 /* If the compilation unit didn't have an explicit address range,
3526 then use the information extracted from its child dies. */
3530 best_highpc
= highpc
;
3533 pst
->textlow
= best_lowpc
+ baseaddr
;
3534 pst
->texthigh
= best_highpc
+ baseaddr
;
3536 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3537 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3538 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3539 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3540 sort_pst_symbols (pst
);
3542 if (is_debug_types_section
)
3544 /* It's not clear we want to do anything with stmt lists here.
3545 Waiting to see what gcc ultimately does. */
3549 /* Get the list of files included in the current compilation unit,
3550 and build a psymtab for each of them. */
3551 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3554 do_cleanups (back_to_inner
);
3557 /* Traversal function for htab_traverse_noresize.
3558 Process one .debug_types comp-unit. */
3561 process_type_comp_unit (void **slot
, void *info
)
3563 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3564 struct dwarf2_per_cu_data
*this_cu
;
3566 gdb_assert (info
== NULL
);
3567 this_cu
= &entry
->per_cu
;
3569 gdb_assert (this_cu
->debug_types_section
->readin
);
3570 process_psymtab_comp_unit (this_cu
, this_cu
->debug_types_section
, 1);
3575 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3576 Build partial symbol tables for the .debug_types comp-units. */
3579 build_type_psymtabs (struct objfile
*objfile
)
3581 if (! create_debug_types_hash_table (objfile
))
3584 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3585 process_type_comp_unit
, NULL
);
3588 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3591 psymtabs_addrmap_cleanup (void *o
)
3593 struct objfile
*objfile
= o
;
3595 objfile
->psymtabs_addrmap
= NULL
;
3598 /* Build the partial symbol table by doing a quick pass through the
3599 .debug_info and .debug_abbrev sections. */
3602 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3604 struct cleanup
*back_to
, *addrmap_cleanup
;
3605 struct obstack temp_obstack
;
3608 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3610 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3612 /* Any cached compilation units will be linked by the per-objfile
3613 read_in_chain. Make sure to free them when we're done. */
3614 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3616 build_type_psymtabs (objfile
);
3618 create_all_comp_units (objfile
);
3620 /* Create a temporary address map on a temporary obstack. We later
3621 copy this to the final obstack. */
3622 obstack_init (&temp_obstack
);
3623 make_cleanup_obstack_free (&temp_obstack
);
3624 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3625 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3627 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
3629 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
3631 process_psymtab_comp_unit (per_cu
, &dwarf2_per_objfile
->info
, 0);
3634 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3635 &objfile
->objfile_obstack
);
3636 discard_cleanups (addrmap_cleanup
);
3638 do_cleanups (back_to
);
3641 /* Load the partial DIEs for a secondary CU into memory. */
3644 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
3646 struct objfile
*objfile
= this_cu
->objfile
;
3647 bfd
*abfd
= objfile
->obfd
;
3649 struct die_info
*comp_unit_die
;
3650 struct dwarf2_cu
*cu
;
3651 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3653 struct die_reader_specs reader_specs
;
3655 struct dwarf2_section_info
*section
= &dwarf2_per_objfile
->info
;
3657 gdb_assert (! this_cu
->debug_types_section
);
3659 gdb_assert (section
->readin
);
3660 info_ptr
= section
->buffer
+ this_cu
->offset
;
3662 if (this_cu
->cu
== NULL
)
3664 cu
= xmalloc (sizeof (*cu
));
3665 init_one_comp_unit (cu
, this_cu
);
3669 /* If an error occurs while loading, release our storage. */
3670 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
3672 info_ptr
= read_and_check_comp_unit_head (&cu
->header
, section
, info_ptr
,
3675 /* Skip dummy compilation units. */
3676 if (info_ptr
>= (section
->buffer
+ section
->size
)
3677 || peek_abbrev_code (abfd
, info_ptr
) == 0)
3679 do_cleanups (free_cu_cleanup
);
3683 /* Link this CU into read_in_chain. */
3684 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3685 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3690 info_ptr
+= cu
->header
.first_die_offset
;
3693 /* Read the abbrevs for this compilation unit into a table. */
3694 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3695 dwarf2_read_abbrevs (cu
);
3696 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3698 /* Read the compilation unit die. */
3699 init_cu_die_reader (&reader_specs
, cu
);
3700 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3703 prepare_one_comp_unit (cu
, comp_unit_die
);
3705 /* Check if comp unit has_children.
3706 If so, read the rest of the partial symbols from this comp unit.
3707 If not, there's no more debug_info for this comp unit. */
3709 load_partial_dies (abfd
, section
->buffer
, info_ptr
, 0, cu
);
3711 do_cleanups (free_abbrevs_cleanup
);
3715 /* We've successfully allocated this compilation unit. Let our
3716 caller clean it up when finished with it. */
3717 discard_cleanups (free_cu_cleanup
);
3721 /* Create a list of all compilation units in OBJFILE.
3722 This is only done for -readnow and building partial symtabs. */
3725 create_all_comp_units (struct objfile
*objfile
)
3729 struct dwarf2_per_cu_data
**all_comp_units
;
3732 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3733 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3737 all_comp_units
= xmalloc (n_allocated
3738 * sizeof (struct dwarf2_per_cu_data
*));
3740 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
3741 + dwarf2_per_objfile
->info
.size
)
3743 unsigned int length
, initial_length_size
;
3744 struct dwarf2_per_cu_data
*this_cu
;
3745 unsigned int offset
;
3747 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3749 /* Read just enough information to find out where the next
3750 compilation unit is. */
3751 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3752 &initial_length_size
);
3754 /* Save the compilation unit for later lookup. */
3755 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3756 sizeof (struct dwarf2_per_cu_data
));
3757 memset (this_cu
, 0, sizeof (*this_cu
));
3758 this_cu
->offset
= offset
;
3759 this_cu
->length
= length
+ initial_length_size
;
3760 this_cu
->objfile
= objfile
;
3762 if (n_comp_units
== n_allocated
)
3765 all_comp_units
= xrealloc (all_comp_units
,
3767 * sizeof (struct dwarf2_per_cu_data
*));
3769 all_comp_units
[n_comp_units
++] = this_cu
;
3771 info_ptr
= info_ptr
+ this_cu
->length
;
3774 dwarf2_per_objfile
->all_comp_units
3775 = obstack_alloc (&objfile
->objfile_obstack
,
3776 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3777 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3778 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3779 xfree (all_comp_units
);
3780 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3783 /* Process all loaded DIEs for compilation unit CU, starting at
3784 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3785 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3786 DW_AT_ranges). If NEED_PC is set, then this function will set
3787 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3788 and record the covered ranges in the addrmap. */
3791 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3792 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3794 struct partial_die_info
*pdi
;
3796 /* Now, march along the PDI's, descending into ones which have
3797 interesting children but skipping the children of the other ones,
3798 until we reach the end of the compilation unit. */
3804 fixup_partial_die (pdi
, cu
);
3806 /* Anonymous namespaces or modules have no name but have interesting
3807 children, so we need to look at them. Ditto for anonymous
3810 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3811 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3815 case DW_TAG_subprogram
:
3816 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3818 case DW_TAG_constant
:
3819 case DW_TAG_variable
:
3820 case DW_TAG_typedef
:
3821 case DW_TAG_union_type
:
3822 if (!pdi
->is_declaration
)
3824 add_partial_symbol (pdi
, cu
);
3827 case DW_TAG_class_type
:
3828 case DW_TAG_interface_type
:
3829 case DW_TAG_structure_type
:
3830 if (!pdi
->is_declaration
)
3832 add_partial_symbol (pdi
, cu
);
3835 case DW_TAG_enumeration_type
:
3836 if (!pdi
->is_declaration
)
3837 add_partial_enumeration (pdi
, cu
);
3839 case DW_TAG_base_type
:
3840 case DW_TAG_subrange_type
:
3841 /* File scope base type definitions are added to the partial
3843 add_partial_symbol (pdi
, cu
);
3845 case DW_TAG_namespace
:
3846 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3849 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3856 /* If the die has a sibling, skip to the sibling. */
3858 pdi
= pdi
->die_sibling
;
3862 /* Functions used to compute the fully scoped name of a partial DIE.
3864 Normally, this is simple. For C++, the parent DIE's fully scoped
3865 name is concatenated with "::" and the partial DIE's name. For
3866 Java, the same thing occurs except that "." is used instead of "::".
3867 Enumerators are an exception; they use the scope of their parent
3868 enumeration type, i.e. the name of the enumeration type is not
3869 prepended to the enumerator.
3871 There are two complexities. One is DW_AT_specification; in this
3872 case "parent" means the parent of the target of the specification,
3873 instead of the direct parent of the DIE. The other is compilers
3874 which do not emit DW_TAG_namespace; in this case we try to guess
3875 the fully qualified name of structure types from their members'
3876 linkage names. This must be done using the DIE's children rather
3877 than the children of any DW_AT_specification target. We only need
3878 to do this for structures at the top level, i.e. if the target of
3879 any DW_AT_specification (if any; otherwise the DIE itself) does not
3882 /* Compute the scope prefix associated with PDI's parent, in
3883 compilation unit CU. The result will be allocated on CU's
3884 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3885 field. NULL is returned if no prefix is necessary. */
3887 partial_die_parent_scope (struct partial_die_info
*pdi
,
3888 struct dwarf2_cu
*cu
)
3890 char *grandparent_scope
;
3891 struct partial_die_info
*parent
, *real_pdi
;
3893 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3894 then this means the parent of the specification DIE. */
3897 while (real_pdi
->has_specification
)
3898 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3900 parent
= real_pdi
->die_parent
;
3904 if (parent
->scope_set
)
3905 return parent
->scope
;
3907 fixup_partial_die (parent
, cu
);
3909 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3911 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3912 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3913 Work around this problem here. */
3914 if (cu
->language
== language_cplus
3915 && parent
->tag
== DW_TAG_namespace
3916 && strcmp (parent
->name
, "::") == 0
3917 && grandparent_scope
== NULL
)
3919 parent
->scope
= NULL
;
3920 parent
->scope_set
= 1;
3924 if (pdi
->tag
== DW_TAG_enumerator
)
3925 /* Enumerators should not get the name of the enumeration as a prefix. */
3926 parent
->scope
= grandparent_scope
;
3927 else if (parent
->tag
== DW_TAG_namespace
3928 || parent
->tag
== DW_TAG_module
3929 || parent
->tag
== DW_TAG_structure_type
3930 || parent
->tag
== DW_TAG_class_type
3931 || parent
->tag
== DW_TAG_interface_type
3932 || parent
->tag
== DW_TAG_union_type
3933 || parent
->tag
== DW_TAG_enumeration_type
)
3935 if (grandparent_scope
== NULL
)
3936 parent
->scope
= parent
->name
;
3938 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
3940 parent
->name
, 0, cu
);
3944 /* FIXME drow/2004-04-01: What should we be doing with
3945 function-local names? For partial symbols, we should probably be
3947 complaint (&symfile_complaints
,
3948 _("unhandled containing DIE tag %d for DIE at %d"),
3949 parent
->tag
, pdi
->offset
);
3950 parent
->scope
= grandparent_scope
;
3953 parent
->scope_set
= 1;
3954 return parent
->scope
;
3957 /* Return the fully scoped name associated with PDI, from compilation unit
3958 CU. The result will be allocated with malloc. */
3960 partial_die_full_name (struct partial_die_info
*pdi
,
3961 struct dwarf2_cu
*cu
)
3965 /* If this is a template instantiation, we can not work out the
3966 template arguments from partial DIEs. So, unfortunately, we have
3967 to go through the full DIEs. At least any work we do building
3968 types here will be reused if full symbols are loaded later. */
3969 if (pdi
->has_template_arguments
)
3971 fixup_partial_die (pdi
, cu
);
3973 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3975 struct die_info
*die
;
3976 struct attribute attr
;
3977 struct dwarf2_cu
*ref_cu
= cu
;
3980 attr
.form
= DW_FORM_ref_addr
;
3981 attr
.u
.addr
= pdi
->offset
;
3982 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3984 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3988 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3989 if (parent_scope
== NULL
)
3992 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3996 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3998 struct objfile
*objfile
= cu
->objfile
;
4000 char *actual_name
= NULL
;
4002 int built_actual_name
= 0;
4004 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4006 actual_name
= partial_die_full_name (pdi
, cu
);
4008 built_actual_name
= 1;
4010 if (actual_name
== NULL
)
4011 actual_name
= pdi
->name
;
4015 case DW_TAG_subprogram
:
4016 if (pdi
->is_external
|| cu
->language
== language_ada
)
4018 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
4019 of the global scope. But in Ada, we want to be able to access
4020 nested procedures globally. So all Ada subprograms are stored
4021 in the global scope. */
4022 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4023 mst_text, objfile); */
4024 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4026 VAR_DOMAIN
, LOC_BLOCK
,
4027 &objfile
->global_psymbols
,
4028 0, pdi
->lowpc
+ baseaddr
,
4029 cu
->language
, objfile
);
4033 /* prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
4034 mst_file_text, objfile); */
4035 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4037 VAR_DOMAIN
, LOC_BLOCK
,
4038 &objfile
->static_psymbols
,
4039 0, pdi
->lowpc
+ baseaddr
,
4040 cu
->language
, objfile
);
4043 case DW_TAG_constant
:
4045 struct psymbol_allocation_list
*list
;
4047 if (pdi
->is_external
)
4048 list
= &objfile
->global_psymbols
;
4050 list
= &objfile
->static_psymbols
;
4051 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4052 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
4053 list
, 0, 0, cu
->language
, objfile
);
4056 case DW_TAG_variable
:
4058 addr
= decode_locdesc (pdi
->locdesc
, cu
);
4062 && !dwarf2_per_objfile
->has_section_at_zero
)
4064 /* A global or static variable may also have been stripped
4065 out by the linker if unused, in which case its address
4066 will be nullified; do not add such variables into partial
4067 symbol table then. */
4069 else if (pdi
->is_external
)
4072 Don't enter into the minimal symbol tables as there is
4073 a minimal symbol table entry from the ELF symbols already.
4074 Enter into partial symbol table if it has a location
4075 descriptor or a type.
4076 If the location descriptor is missing, new_symbol will create
4077 a LOC_UNRESOLVED symbol, the address of the variable will then
4078 be determined from the minimal symbol table whenever the variable
4080 The address for the partial symbol table entry is not
4081 used by GDB, but it comes in handy for debugging partial symbol
4084 if (pdi
->locdesc
|| pdi
->has_type
)
4085 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4087 VAR_DOMAIN
, LOC_STATIC
,
4088 &objfile
->global_psymbols
,
4090 cu
->language
, objfile
);
4094 /* Static Variable. Skip symbols without location descriptors. */
4095 if (pdi
->locdesc
== NULL
)
4097 if (built_actual_name
)
4098 xfree (actual_name
);
4101 /* prim_record_minimal_symbol (actual_name, addr + baseaddr,
4102 mst_file_data, objfile); */
4103 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4105 VAR_DOMAIN
, LOC_STATIC
,
4106 &objfile
->static_psymbols
,
4108 cu
->language
, objfile
);
4111 case DW_TAG_typedef
:
4112 case DW_TAG_base_type
:
4113 case DW_TAG_subrange_type
:
4114 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4116 VAR_DOMAIN
, LOC_TYPEDEF
,
4117 &objfile
->static_psymbols
,
4118 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4120 case DW_TAG_namespace
:
4121 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4123 VAR_DOMAIN
, LOC_TYPEDEF
,
4124 &objfile
->global_psymbols
,
4125 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4127 case DW_TAG_class_type
:
4128 case DW_TAG_interface_type
:
4129 case DW_TAG_structure_type
:
4130 case DW_TAG_union_type
:
4131 case DW_TAG_enumeration_type
:
4132 /* Skip external references. The DWARF standard says in the section
4133 about "Structure, Union, and Class Type Entries": "An incomplete
4134 structure, union or class type is represented by a structure,
4135 union or class entry that does not have a byte size attribute
4136 and that has a DW_AT_declaration attribute." */
4137 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
4139 if (built_actual_name
)
4140 xfree (actual_name
);
4144 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
4145 static vs. global. */
4146 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4148 STRUCT_DOMAIN
, LOC_TYPEDEF
,
4149 (cu
->language
== language_cplus
4150 || cu
->language
== language_java
)
4151 ? &objfile
->global_psymbols
4152 : &objfile
->static_psymbols
,
4153 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4156 case DW_TAG_enumerator
:
4157 add_psymbol_to_list (actual_name
, strlen (actual_name
),
4159 VAR_DOMAIN
, LOC_CONST
,
4160 (cu
->language
== language_cplus
4161 || cu
->language
== language_java
)
4162 ? &objfile
->global_psymbols
4163 : &objfile
->static_psymbols
,
4164 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
4170 if (built_actual_name
)
4171 xfree (actual_name
);
4174 /* Read a partial die corresponding to a namespace; also, add a symbol
4175 corresponding to that namespace to the symbol table. NAMESPACE is
4176 the name of the enclosing namespace. */
4179 add_partial_namespace (struct partial_die_info
*pdi
,
4180 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4181 int need_pc
, struct dwarf2_cu
*cu
)
4183 /* Add a symbol for the namespace. */
4185 add_partial_symbol (pdi
, cu
);
4187 /* Now scan partial symbols in that namespace. */
4189 if (pdi
->has_children
)
4190 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4193 /* Read a partial die corresponding to a Fortran module. */
4196 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
4197 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
4199 /* Now scan partial symbols in that module. */
4201 if (pdi
->has_children
)
4202 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
4205 /* Read a partial die corresponding to a subprogram and create a partial
4206 symbol for that subprogram. When the CU language allows it, this
4207 routine also defines a partial symbol for each nested subprogram
4208 that this subprogram contains.
4210 DIE my also be a lexical block, in which case we simply search
4211 recursively for suprograms defined inside that lexical block.
4212 Again, this is only performed when the CU language allows this
4213 type of definitions. */
4216 add_partial_subprogram (struct partial_die_info
*pdi
,
4217 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4218 int need_pc
, struct dwarf2_cu
*cu
)
4220 if (pdi
->tag
== DW_TAG_subprogram
)
4222 if (pdi
->has_pc_info
)
4224 if (pdi
->lowpc
< *lowpc
)
4225 *lowpc
= pdi
->lowpc
;
4226 if (pdi
->highpc
> *highpc
)
4227 *highpc
= pdi
->highpc
;
4231 struct objfile
*objfile
= cu
->objfile
;
4233 baseaddr
= ANOFFSET (objfile
->section_offsets
,
4234 SECT_OFF_TEXT (objfile
));
4235 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4236 pdi
->lowpc
+ baseaddr
,
4237 pdi
->highpc
- 1 + baseaddr
,
4238 cu
->per_cu
->v
.psymtab
);
4240 if (!pdi
->is_declaration
)
4241 /* Ignore subprogram DIEs that do not have a name, they are
4242 illegal. Do not emit a complaint at this point, we will
4243 do so when we convert this psymtab into a symtab. */
4245 add_partial_symbol (pdi
, cu
);
4249 if (! pdi
->has_children
)
4252 if (cu
->language
== language_ada
)
4254 pdi
= pdi
->die_child
;
4257 fixup_partial_die (pdi
, cu
);
4258 if (pdi
->tag
== DW_TAG_subprogram
4259 || pdi
->tag
== DW_TAG_lexical_block
)
4260 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
4261 pdi
= pdi
->die_sibling
;
4266 /* Read a partial die corresponding to an enumeration type. */
4269 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
4270 struct dwarf2_cu
*cu
)
4272 struct partial_die_info
*pdi
;
4274 if (enum_pdi
->name
!= NULL
)
4275 add_partial_symbol (enum_pdi
, cu
);
4277 pdi
= enum_pdi
->die_child
;
4280 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
4281 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
4283 add_partial_symbol (pdi
, cu
);
4284 pdi
= pdi
->die_sibling
;
4288 /* Return the initial uleb128 in the die at INFO_PTR. */
4291 peek_abbrev_code (bfd
*abfd
, gdb_byte
*info_ptr
)
4293 unsigned int bytes_read
;
4295 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4298 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
4299 Return the corresponding abbrev, or NULL if the number is zero (indicating
4300 an empty DIE). In either case *BYTES_READ will be set to the length of
4301 the initial number. */
4303 static struct abbrev_info
*
4304 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
4305 struct dwarf2_cu
*cu
)
4307 bfd
*abfd
= cu
->objfile
->obfd
;
4308 unsigned int abbrev_number
;
4309 struct abbrev_info
*abbrev
;
4311 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
4313 if (abbrev_number
== 0)
4316 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
4319 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"),
4320 abbrev_number
, bfd_get_filename (abfd
));
4326 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4327 Returns a pointer to the end of a series of DIEs, terminated by an empty
4328 DIE. Any children of the skipped DIEs will also be skipped. */
4331 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
4333 struct abbrev_info
*abbrev
;
4334 unsigned int bytes_read
;
4338 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4340 return info_ptr
+ bytes_read
;
4342 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4346 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4347 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4348 abbrev corresponding to that skipped uleb128 should be passed in
4349 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4353 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4354 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4356 unsigned int bytes_read
;
4357 struct attribute attr
;
4358 bfd
*abfd
= cu
->objfile
->obfd
;
4359 unsigned int form
, i
;
4361 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4363 /* The only abbrev we care about is DW_AT_sibling. */
4364 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4366 read_attribute (&attr
, &abbrev
->attrs
[i
],
4367 abfd
, info_ptr
, cu
);
4368 if (attr
.form
== DW_FORM_ref_addr
)
4369 complaint (&symfile_complaints
,
4370 _("ignoring absolute DW_AT_sibling"));
4372 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4375 /* If it isn't DW_AT_sibling, skip this attribute. */
4376 form
= abbrev
->attrs
[i
].form
;
4380 case DW_FORM_ref_addr
:
4381 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4382 and later it is offset sized. */
4383 if (cu
->header
.version
== 2)
4384 info_ptr
+= cu
->header
.addr_size
;
4386 info_ptr
+= cu
->header
.offset_size
;
4389 info_ptr
+= cu
->header
.addr_size
;
4396 case DW_FORM_flag_present
:
4408 case DW_FORM_ref_sig8
:
4411 case DW_FORM_string
:
4412 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4413 info_ptr
+= bytes_read
;
4415 case DW_FORM_sec_offset
:
4417 info_ptr
+= cu
->header
.offset_size
;
4419 case DW_FORM_exprloc
:
4421 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4422 info_ptr
+= bytes_read
;
4424 case DW_FORM_block1
:
4425 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4427 case DW_FORM_block2
:
4428 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4430 case DW_FORM_block4
:
4431 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4435 case DW_FORM_ref_udata
:
4436 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4438 case DW_FORM_indirect
:
4439 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4440 info_ptr
+= bytes_read
;
4441 /* We need to continue parsing from here, so just go back to
4443 goto skip_attribute
;
4446 error (_("Dwarf Error: Cannot handle %s "
4447 "in DWARF reader [in module %s]"),
4448 dwarf_form_name (form
),
4449 bfd_get_filename (abfd
));
4453 if (abbrev
->has_children
)
4454 return skip_children (buffer
, info_ptr
, cu
);
4459 /* Locate ORIG_PDI's sibling.
4460 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4464 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4465 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4466 bfd
*abfd
, struct dwarf2_cu
*cu
)
4468 /* Do we know the sibling already? */
4470 if (orig_pdi
->sibling
)
4471 return orig_pdi
->sibling
;
4473 /* Are there any children to deal with? */
4475 if (!orig_pdi
->has_children
)
4478 /* Skip the children the long way. */
4480 return skip_children (buffer
, info_ptr
, cu
);
4483 /* Expand this partial symbol table into a full symbol table. */
4486 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4492 warning (_("bug: psymtab for %s is already read in."),
4499 printf_filtered (_("Reading in symbols for %s..."),
4501 gdb_flush (gdb_stdout
);
4504 /* Restore our global data. */
4505 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4506 dwarf2_objfile_data_key
);
4508 /* If this psymtab is constructed from a debug-only objfile, the
4509 has_section_at_zero flag will not necessarily be correct. We
4510 can get the correct value for this flag by looking at the data
4511 associated with the (presumably stripped) associated objfile. */
4512 if (pst
->objfile
->separate_debug_objfile_backlink
)
4514 struct dwarf2_per_objfile
*dpo_backlink
4515 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4516 dwarf2_objfile_data_key
);
4518 dwarf2_per_objfile
->has_section_at_zero
4519 = dpo_backlink
->has_section_at_zero
;
4522 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4524 psymtab_to_symtab_1 (pst
);
4526 /* Finish up the debug error message. */
4528 printf_filtered (_("done.\n"));
4533 /* Reading in full CUs. */
4535 /* Add PER_CU to the queue. */
4538 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4540 struct dwarf2_queue_item
*item
;
4543 item
= xmalloc (sizeof (*item
));
4544 item
->per_cu
= per_cu
;
4547 if (dwarf2_queue
== NULL
)
4548 dwarf2_queue
= item
;
4550 dwarf2_queue_tail
->next
= item
;
4552 dwarf2_queue_tail
= item
;
4555 /* Process the queue. */
4558 process_queue (void)
4560 struct dwarf2_queue_item
*item
, *next_item
;
4562 /* The queue starts out with one item, but following a DIE reference
4563 may load a new CU, adding it to the end of the queue. */
4564 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4566 if (dwarf2_per_objfile
->using_index
4567 ? !item
->per_cu
->v
.quick
->symtab
4568 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4569 process_full_comp_unit (item
->per_cu
);
4571 item
->per_cu
->queued
= 0;
4572 next_item
= item
->next
;
4576 dwarf2_queue_tail
= NULL
;
4579 /* Free all allocated queue entries. This function only releases anything if
4580 an error was thrown; if the queue was processed then it would have been
4581 freed as we went along. */
4584 dwarf2_release_queue (void *dummy
)
4586 struct dwarf2_queue_item
*item
, *last
;
4588 item
= dwarf2_queue
;
4591 /* Anything still marked queued is likely to be in an
4592 inconsistent state, so discard it. */
4593 if (item
->per_cu
->queued
)
4595 if (item
->per_cu
->cu
!= NULL
)
4596 free_one_cached_comp_unit (item
->per_cu
->cu
);
4597 item
->per_cu
->queued
= 0;
4605 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4608 /* Read in full symbols for PST, and anything it depends on. */
4611 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4613 struct dwarf2_per_cu_data
*per_cu
;
4614 struct cleanup
*back_to
;
4617 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4618 if (!pst
->dependencies
[i
]->readin
)
4620 /* Inform about additional files that need to be read in. */
4623 /* FIXME: i18n: Need to make this a single string. */
4624 fputs_filtered (" ", gdb_stdout
);
4626 fputs_filtered ("and ", gdb_stdout
);
4628 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4629 wrap_here (""); /* Flush output. */
4630 gdb_flush (gdb_stdout
);
4632 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4635 per_cu
= pst
->read_symtab_private
;
4639 /* It's an include file, no symbols to read for it.
4640 Everything is in the parent symtab. */
4645 dw2_do_instantiate_symtab (per_cu
);
4648 /* Load the DIEs associated with PER_CU into memory. */
4651 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4653 struct objfile
*objfile
= per_cu
->objfile
;
4654 bfd
*abfd
= objfile
->obfd
;
4655 struct dwarf2_cu
*cu
;
4656 unsigned int offset
;
4657 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4658 struct cleanup
*free_cu_cleanup
= NULL
;
4659 struct attribute
*attr
;
4662 gdb_assert (! per_cu
->debug_types_section
);
4664 /* Set local variables from the partial symbol table info. */
4665 offset
= per_cu
->offset
;
4667 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4668 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4669 beg_of_comp_unit
= info_ptr
;
4671 if (per_cu
->cu
== NULL
)
4673 cu
= xmalloc (sizeof (*cu
));
4674 init_one_comp_unit (cu
, per_cu
);
4678 /* If an error occurs while loading, release our storage. */
4679 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
4681 /* Read in the comp_unit header. */
4682 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4684 /* Skip dummy compilation units. */
4685 if (info_ptr
>= (dwarf2_per_objfile
->info
.buffer
4686 + dwarf2_per_objfile
->info
.size
)
4687 || peek_abbrev_code (abfd
, info_ptr
) == 0)
4689 do_cleanups (free_cu_cleanup
);
4693 /* Complete the cu_header. */
4694 cu
->header
.offset
= offset
;
4695 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4697 /* Link this CU into read_in_chain. */
4698 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4699 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4704 info_ptr
+= cu
->header
.first_die_offset
;
4707 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4709 /* We try not to read any attributes in this function, because not
4710 all CUs needed for references have been loaded yet, and symbol
4711 table processing isn't initialized. But we have to set the CU language,
4712 or we won't be able to build types correctly. */
4713 prepare_one_comp_unit (cu
, cu
->dies
);
4715 /* Similarly, if we do not read the producer, we can not apply
4716 producer-specific interpretation. */
4717 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4719 cu
->producer
= DW_STRING (attr
);
4723 /* We've successfully allocated this compilation unit. Let our
4724 caller clean it up when finished with it. */
4725 discard_cleanups (free_cu_cleanup
);
4729 /* Add a DIE to the delayed physname list. */
4732 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4733 const char *name
, struct die_info
*die
,
4734 struct dwarf2_cu
*cu
)
4736 struct delayed_method_info mi
;
4738 mi
.fnfield_index
= fnfield_index
;
4742 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4745 /* A cleanup for freeing the delayed method list. */
4748 free_delayed_list (void *ptr
)
4750 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4751 if (cu
->method_list
!= NULL
)
4753 VEC_free (delayed_method_info
, cu
->method_list
);
4754 cu
->method_list
= NULL
;
4758 /* Compute the physnames of any methods on the CU's method list.
4760 The computation of method physnames is delayed in order to avoid the
4761 (bad) condition that one of the method's formal parameters is of an as yet
4765 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4768 struct delayed_method_info
*mi
;
4769 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4771 const char *physname
;
4772 struct fn_fieldlist
*fn_flp
4773 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4774 physname
= dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4775 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4779 /* Generate full symbol information for PER_CU, whose DIEs have
4780 already been loaded into memory. */
4783 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4785 struct dwarf2_cu
*cu
= per_cu
->cu
;
4786 struct objfile
*objfile
= per_cu
->objfile
;
4787 CORE_ADDR lowpc
, highpc
;
4788 struct symtab
*symtab
;
4789 struct cleanup
*back_to
, *delayed_list_cleanup
;
4792 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4795 back_to
= make_cleanup (really_free_pendings
, NULL
);
4796 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4798 cu
->list_in_scope
= &file_symbols
;
4800 /* Do line number decoding in read_file_scope () */
4801 process_die (cu
->dies
, cu
);
4803 /* Now that we have processed all the DIEs in the CU, all the types
4804 should be complete, and it should now be safe to compute all of the
4806 compute_delayed_physnames (cu
);
4807 do_cleanups (delayed_list_cleanup
);
4809 /* Some compilers don't define a DW_AT_high_pc attribute for the
4810 compilation unit. If the DW_AT_high_pc is missing, synthesize
4811 it, by scanning the DIE's below the compilation unit. */
4812 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4814 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4818 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
4820 /* Set symtab language to language from DW_AT_language. If the
4821 compilation is from a C file generated by language preprocessors, do
4822 not set the language if it was already deduced by start_subfile. */
4823 if (!(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4824 symtab
->language
= cu
->language
;
4826 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
4827 produce DW_AT_location with location lists but it can be possibly
4828 invalid without -fvar-tracking.
4830 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
4831 needed, it would be wrong due to missing DW_AT_producer there.
4833 Still one can confuse GDB by using non-standard GCC compilation
4834 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
4836 if (cu
->has_loclist
&& gcc_4_minor
>= 0)
4837 symtab
->locations_valid
= 1;
4839 if (gcc_4_minor
>= 5)
4840 symtab
->epilogue_unwind_valid
= 1;
4842 symtab
->call_site_htab
= cu
->call_site_htab
;
4845 if (dwarf2_per_objfile
->using_index
)
4846 per_cu
->v
.quick
->symtab
= symtab
;
4849 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4850 pst
->symtab
= symtab
;
4854 do_cleanups (back_to
);
4857 /* Process a die and its children. */
4860 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4864 case DW_TAG_padding
:
4866 case DW_TAG_compile_unit
:
4867 read_file_scope (die
, cu
);
4869 case DW_TAG_type_unit
:
4870 read_type_unit_scope (die
, cu
);
4872 case DW_TAG_subprogram
:
4873 case DW_TAG_inlined_subroutine
:
4874 read_func_scope (die
, cu
);
4876 case DW_TAG_lexical_block
:
4877 case DW_TAG_try_block
:
4878 case DW_TAG_catch_block
:
4879 read_lexical_block_scope (die
, cu
);
4881 case DW_TAG_GNU_call_site
:
4882 read_call_site_scope (die
, cu
);
4884 case DW_TAG_class_type
:
4885 case DW_TAG_interface_type
:
4886 case DW_TAG_structure_type
:
4887 case DW_TAG_union_type
:
4888 process_structure_scope (die
, cu
);
4890 case DW_TAG_enumeration_type
:
4891 process_enumeration_scope (die
, cu
);
4894 /* These dies have a type, but processing them does not create
4895 a symbol or recurse to process the children. Therefore we can
4896 read them on-demand through read_type_die. */
4897 case DW_TAG_subroutine_type
:
4898 case DW_TAG_set_type
:
4899 case DW_TAG_array_type
:
4900 case DW_TAG_pointer_type
:
4901 case DW_TAG_ptr_to_member_type
:
4902 case DW_TAG_reference_type
:
4903 case DW_TAG_string_type
:
4906 case DW_TAG_base_type
:
4907 case DW_TAG_subrange_type
:
4908 case DW_TAG_typedef
:
4909 /* Add a typedef symbol for the type definition, if it has a
4911 new_symbol (die
, read_type_die (die
, cu
), cu
);
4913 case DW_TAG_common_block
:
4914 read_common_block (die
, cu
);
4916 case DW_TAG_common_inclusion
:
4918 case DW_TAG_namespace
:
4919 processing_has_namespace_info
= 1;
4920 read_namespace (die
, cu
);
4923 processing_has_namespace_info
= 1;
4924 read_module (die
, cu
);
4926 case DW_TAG_imported_declaration
:
4927 case DW_TAG_imported_module
:
4928 processing_has_namespace_info
= 1;
4929 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4930 || cu
->language
!= language_fortran
))
4931 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4932 dwarf_tag_name (die
->tag
));
4933 read_import_statement (die
, cu
);
4936 new_symbol (die
, NULL
, cu
);
4941 /* A helper function for dwarf2_compute_name which determines whether DIE
4942 needs to have the name of the scope prepended to the name listed in the
4946 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4948 struct attribute
*attr
;
4952 case DW_TAG_namespace
:
4953 case DW_TAG_typedef
:
4954 case DW_TAG_class_type
:
4955 case DW_TAG_interface_type
:
4956 case DW_TAG_structure_type
:
4957 case DW_TAG_union_type
:
4958 case DW_TAG_enumeration_type
:
4959 case DW_TAG_enumerator
:
4960 case DW_TAG_subprogram
:
4964 case DW_TAG_variable
:
4965 case DW_TAG_constant
:
4966 /* We only need to prefix "globally" visible variables. These include
4967 any variable marked with DW_AT_external or any variable that
4968 lives in a namespace. [Variables in anonymous namespaces
4969 require prefixing, but they are not DW_AT_external.] */
4971 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4973 struct dwarf2_cu
*spec_cu
= cu
;
4975 return die_needs_namespace (die_specification (die
, &spec_cu
),
4979 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4980 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4981 && die
->parent
->tag
!= DW_TAG_module
)
4983 /* A variable in a lexical block of some kind does not need a
4984 namespace, even though in C++ such variables may be external
4985 and have a mangled name. */
4986 if (die
->parent
->tag
== DW_TAG_lexical_block
4987 || die
->parent
->tag
== DW_TAG_try_block
4988 || die
->parent
->tag
== DW_TAG_catch_block
4989 || die
->parent
->tag
== DW_TAG_subprogram
)
4998 /* Retrieve the last character from a mem_file. */
5001 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
5003 char *last_char_p
= (char *) object
;
5006 *last_char_p
= buffer
[length
- 1];
5009 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
5010 compute the physname for the object, which include a method's
5011 formal parameters (C++/Java) and return type (Java).
5013 For Ada, return the DIE's linkage name rather than the fully qualified
5014 name. PHYSNAME is ignored..
5016 The result is allocated on the objfile_obstack and canonicalized. */
5019 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
5022 struct objfile
*objfile
= cu
->objfile
;
5025 name
= dwarf2_name (die
, cu
);
5027 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
5028 compute it by typename_concat inside GDB. */
5029 if (cu
->language
== language_ada
5030 || (cu
->language
== language_fortran
&& physname
))
5032 /* For Ada unit, we prefer the linkage name over the name, as
5033 the former contains the exported name, which the user expects
5034 to be able to reference. Ideally, we want the user to be able
5035 to reference this entity using either natural or linkage name,
5036 but we haven't started looking at this enhancement yet. */
5037 struct attribute
*attr
;
5039 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
5041 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
5042 if (attr
&& DW_STRING (attr
))
5043 return DW_STRING (attr
);
5046 /* These are the only languages we know how to qualify names in. */
5048 && (cu
->language
== language_cplus
|| cu
->language
== language_java
5049 || cu
->language
== language_fortran
))
5051 if (die_needs_namespace (die
, cu
))
5055 struct ui_file
*buf
;
5057 prefix
= determine_prefix (die
, cu
);
5058 buf
= mem_fileopen ();
5059 if (*prefix
!= '\0')
5061 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
5064 fputs_unfiltered (prefixed_name
, buf
);
5065 xfree (prefixed_name
);
5068 fputs_unfiltered (name
, buf
);
5070 /* Template parameters may be specified in the DIE's DW_AT_name, or
5071 as children with DW_TAG_template_type_param or
5072 DW_TAG_value_type_param. If the latter, add them to the name
5073 here. If the name already has template parameters, then
5074 skip this step; some versions of GCC emit both, and
5075 it is more efficient to use the pre-computed name.
5077 Something to keep in mind about this process: it is very
5078 unlikely, or in some cases downright impossible, to produce
5079 something that will match the mangled name of a function.
5080 If the definition of the function has the same debug info,
5081 we should be able to match up with it anyway. But fallbacks
5082 using the minimal symbol, for instance to find a method
5083 implemented in a stripped copy of libstdc++, will not work.
5084 If we do not have debug info for the definition, we will have to
5085 match them up some other way.
5087 When we do name matching there is a related problem with function
5088 templates; two instantiated function templates are allowed to
5089 differ only by their return types, which we do not add here. */
5091 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
5093 struct attribute
*attr
;
5094 struct die_info
*child
;
5097 die
->building_fullname
= 1;
5099 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
5104 struct dwarf2_locexpr_baton
*baton
;
5107 if (child
->tag
!= DW_TAG_template_type_param
5108 && child
->tag
!= DW_TAG_template_value_param
)
5113 fputs_unfiltered ("<", buf
);
5117 fputs_unfiltered (", ", buf
);
5119 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
5122 complaint (&symfile_complaints
,
5123 _("template parameter missing DW_AT_type"));
5124 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
5127 type
= die_type (child
, cu
);
5129 if (child
->tag
== DW_TAG_template_type_param
)
5131 c_print_type (type
, "", buf
, -1, 0);
5135 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
5138 complaint (&symfile_complaints
,
5139 _("template parameter missing "
5140 "DW_AT_const_value"));
5141 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
5145 dwarf2_const_value_attr (attr
, type
, name
,
5146 &cu
->comp_unit_obstack
, cu
,
5147 &value
, &bytes
, &baton
);
5149 if (TYPE_NOSIGN (type
))
5150 /* GDB prints characters as NUMBER 'CHAR'. If that's
5151 changed, this can use value_print instead. */
5152 c_printchar (value
, type
, buf
);
5155 struct value_print_options opts
;
5158 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
5162 else if (bytes
!= NULL
)
5164 v
= allocate_value (type
);
5165 memcpy (value_contents_writeable (v
), bytes
,
5166 TYPE_LENGTH (type
));
5169 v
= value_from_longest (type
, value
);
5171 /* Specify decimal so that we do not depend on
5173 get_formatted_print_options (&opts
, 'd');
5175 value_print (v
, buf
, &opts
);
5181 die
->building_fullname
= 0;
5185 /* Close the argument list, with a space if necessary
5186 (nested templates). */
5187 char last_char
= '\0';
5188 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
5189 if (last_char
== '>')
5190 fputs_unfiltered (" >", buf
);
5192 fputs_unfiltered (">", buf
);
5196 /* For Java and C++ methods, append formal parameter type
5197 information, if PHYSNAME. */
5199 if (physname
&& die
->tag
== DW_TAG_subprogram
5200 && (cu
->language
== language_cplus
5201 || cu
->language
== language_java
))
5203 struct type
*type
= read_type_die (die
, cu
);
5205 c_type_print_args (type
, buf
, 1, cu
->language
);
5207 if (cu
->language
== language_java
)
5209 /* For java, we must append the return type to method
5211 if (die
->tag
== DW_TAG_subprogram
)
5212 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
5215 else if (cu
->language
== language_cplus
)
5217 /* Assume that an artificial first parameter is
5218 "this", but do not crash if it is not. RealView
5219 marks unnamed (and thus unused) parameters as
5220 artificial; there is no way to differentiate
5222 if (TYPE_NFIELDS (type
) > 0
5223 && TYPE_FIELD_ARTIFICIAL (type
, 0)
5224 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
5225 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
5227 fputs_unfiltered (" const", buf
);
5231 name
= ui_file_obsavestring (buf
, &objfile
->objfile_obstack
,
5233 ui_file_delete (buf
);
5235 if (cu
->language
== language_cplus
)
5238 = dwarf2_canonicalize_name (name
, cu
,
5239 &objfile
->objfile_obstack
);
5250 /* Return the fully qualified name of DIE, based on its DW_AT_name.
5251 If scope qualifiers are appropriate they will be added. The result
5252 will be allocated on the objfile_obstack, or NULL if the DIE does
5253 not have a name. NAME may either be from a previous call to
5254 dwarf2_name or NULL.
5256 The output string will be canonicalized (if C++/Java). */
5259 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5261 return dwarf2_compute_name (name
, die
, cu
, 0);
5264 /* Construct a physname for the given DIE in CU. NAME may either be
5265 from a previous call to dwarf2_name or NULL. The result will be
5266 allocated on the objfile_objstack or NULL if the DIE does not have a
5269 The output string will be canonicalized (if C++/Java). */
5272 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
5274 struct objfile
*objfile
= cu
->objfile
;
5275 struct attribute
*attr
;
5276 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
5277 struct cleanup
*back_to
;
5280 /* In this case dwarf2_compute_name is just a shortcut not building anything
5282 if (!die_needs_namespace (die
, cu
))
5283 return dwarf2_compute_name (name
, die
, cu
, 1);
5285 back_to
= make_cleanup (null_cleanup
, NULL
);
5287 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
5289 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
5291 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
5293 if (attr
&& DW_STRING (attr
))
5297 mangled
= DW_STRING (attr
);
5299 /* Use DMGL_RET_DROP for C++ template functions to suppress their return
5300 type. It is easier for GDB users to search for such functions as
5301 `name(params)' than `long name(params)'. In such case the minimal
5302 symbol names do not match the full symbol names but for template
5303 functions there is never a need to look up their definition from their
5304 declaration so the only disadvantage remains the minimal symbol
5305 variant `long name(params)' does not have the proper inferior type.
5308 demangled
= cplus_demangle (mangled
, (DMGL_PARAMS
| DMGL_ANSI
5309 | (cu
->language
== language_java
5310 ? DMGL_JAVA
| DMGL_RET_POSTFIX
5314 make_cleanup (xfree
, demangled
);
5324 if (canon
== NULL
|| check_physname
)
5326 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
5328 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
5330 /* It may not mean a bug in GDB. The compiler could also
5331 compute DW_AT_linkage_name incorrectly. But in such case
5332 GDB would need to be bug-to-bug compatible. */
5334 complaint (&symfile_complaints
,
5335 _("Computed physname <%s> does not match demangled <%s> "
5336 "(from linkage <%s>) - DIE at 0x%x [in module %s]"),
5337 physname
, canon
, mangled
, die
->offset
, objfile
->name
);
5339 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
5340 is available here - over computed PHYSNAME. It is safer
5341 against both buggy GDB and buggy compilers. */
5355 retval
= obsavestring (retval
, strlen (retval
),
5356 &objfile
->objfile_obstack
);
5358 do_cleanups (back_to
);
5362 /* Read the import statement specified by the given die and record it. */
5365 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
5367 struct objfile
*objfile
= cu
->objfile
;
5368 struct attribute
*import_attr
;
5369 struct die_info
*imported_die
, *child_die
;
5370 struct dwarf2_cu
*imported_cu
;
5371 const char *imported_name
;
5372 const char *imported_name_prefix
;
5373 const char *canonical_name
;
5374 const char *import_alias
;
5375 const char *imported_declaration
= NULL
;
5376 const char *import_prefix
;
5377 VEC (const_char_ptr
) *excludes
= NULL
;
5378 struct cleanup
*cleanups
;
5382 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
5383 if (import_attr
== NULL
)
5385 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
5386 dwarf_tag_name (die
->tag
));
5391 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
5392 imported_name
= dwarf2_name (imported_die
, imported_cu
);
5393 if (imported_name
== NULL
)
5395 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
5397 The import in the following code:
5411 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
5412 <52> DW_AT_decl_file : 1
5413 <53> DW_AT_decl_line : 6
5414 <54> DW_AT_import : <0x75>
5415 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
5417 <5b> DW_AT_decl_file : 1
5418 <5c> DW_AT_decl_line : 2
5419 <5d> DW_AT_type : <0x6e>
5421 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
5422 <76> DW_AT_byte_size : 4
5423 <77> DW_AT_encoding : 5 (signed)
5425 imports the wrong die ( 0x75 instead of 0x58 ).
5426 This case will be ignored until the gcc bug is fixed. */
5430 /* Figure out the local name after import. */
5431 import_alias
= dwarf2_name (die
, cu
);
5433 /* Figure out where the statement is being imported to. */
5434 import_prefix
= determine_prefix (die
, cu
);
5436 /* Figure out what the scope of the imported die is and prepend it
5437 to the name of the imported die. */
5438 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
5440 if (imported_die
->tag
!= DW_TAG_namespace
5441 && imported_die
->tag
!= DW_TAG_module
)
5443 imported_declaration
= imported_name
;
5444 canonical_name
= imported_name_prefix
;
5446 else if (strlen (imported_name_prefix
) > 0)
5448 temp
= alloca (strlen (imported_name_prefix
)
5449 + 2 + strlen (imported_name
) + 1);
5450 strcpy (temp
, imported_name_prefix
);
5451 strcat (temp
, "::");
5452 strcat (temp
, imported_name
);
5453 canonical_name
= temp
;
5456 canonical_name
= imported_name
;
5458 cleanups
= make_cleanup (VEC_cleanup (const_char_ptr
), &excludes
);
5460 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
5461 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
5462 child_die
= sibling_die (child_die
))
5464 /* DWARF-4: A Fortran use statement with a “rename list” may be
5465 represented by an imported module entry with an import attribute
5466 referring to the module and owned entries corresponding to those
5467 entities that are renamed as part of being imported. */
5469 if (child_die
->tag
!= DW_TAG_imported_declaration
)
5471 complaint (&symfile_complaints
,
5472 _("child DW_TAG_imported_declaration expected "
5473 "- DIE at 0x%x [in module %s]"),
5474 child_die
->offset
, objfile
->name
);
5478 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
5479 if (import_attr
== NULL
)
5481 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
5482 dwarf_tag_name (child_die
->tag
));
5487 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
5489 imported_name
= dwarf2_name (imported_die
, imported_cu
);
5490 if (imported_name
== NULL
)
5492 complaint (&symfile_complaints
,
5493 _("child DW_TAG_imported_declaration has unknown "
5494 "imported name - DIE at 0x%x [in module %s]"),
5495 child_die
->offset
, objfile
->name
);
5499 VEC_safe_push (const_char_ptr
, excludes
, imported_name
);
5501 process_die (child_die
, cu
);
5504 cp_add_using_directive (import_prefix
,
5507 imported_declaration
,
5509 &objfile
->objfile_obstack
);
5511 do_cleanups (cleanups
);
5514 /* Cleanup function for read_file_scope. */
5517 free_cu_line_header (void *arg
)
5519 struct dwarf2_cu
*cu
= arg
;
5521 free_line_header (cu
->line_header
);
5522 cu
->line_header
= NULL
;
5526 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5527 char **name
, char **comp_dir
)
5529 struct attribute
*attr
;
5534 /* Find the filename. Do not use dwarf2_name here, since the filename
5535 is not a source language identifier. */
5536 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5539 *name
= DW_STRING (attr
);
5542 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5544 *comp_dir
= DW_STRING (attr
);
5545 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5547 *comp_dir
= ldirname (*name
);
5548 if (*comp_dir
!= NULL
)
5549 make_cleanup (xfree
, *comp_dir
);
5551 if (*comp_dir
!= NULL
)
5553 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5554 directory, get rid of it. */
5555 char *cp
= strchr (*comp_dir
, ':');
5557 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5562 *name
= "<unknown>";
5565 /* Handle DW_AT_stmt_list for a compilation unit or type unit.
5566 DIE is the DW_TAG_compile_unit or DW_TAG_type_unit die for CU.
5567 COMP_DIR is the compilation directory.
5568 WANT_LINE_INFO is non-zero if the pc/line-number mapping is needed. */
5571 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
5572 const char *comp_dir
, int want_line_info
)
5574 struct attribute
*attr
;
5575 struct objfile
*objfile
= cu
->objfile
;
5576 bfd
*abfd
= objfile
->obfd
;
5578 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5581 unsigned int line_offset
= DW_UNSND (attr
);
5582 struct line_header
*line_header
5583 = dwarf_decode_line_header (line_offset
, abfd
, cu
);
5587 cu
->line_header
= line_header
;
5588 make_cleanup (free_cu_line_header
, cu
);
5589 dwarf_decode_lines (line_header
, comp_dir
, cu
, NULL
, want_line_info
);
5594 /* Process DW_TAG_compile_unit. */
5597 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5599 struct objfile
*objfile
= cu
->objfile
;
5600 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5601 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5602 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5603 struct attribute
*attr
;
5605 char *comp_dir
= NULL
;
5606 struct die_info
*child_die
;
5607 bfd
*abfd
= objfile
->obfd
;
5610 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5612 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5614 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5615 from finish_block. */
5616 if (lowpc
== ((CORE_ADDR
) -1))
5621 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5623 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5626 set_cu_language (DW_UNSND (attr
), cu
);
5629 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5631 cu
->producer
= DW_STRING (attr
);
5633 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
5634 standardised yet. As a workaround for the language detection we fall
5635 back to the DW_AT_producer string. */
5636 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
5637 cu
->language
= language_opencl
;
5639 /* We assume that we're processing GCC output. */
5640 processing_gcc_compilation
= 2;
5642 processing_has_namespace_info
= 0;
5644 start_symtab (name
, comp_dir
, lowpc
);
5645 record_debugformat ("DWARF 2");
5646 record_producer (cu
->producer
);
5648 /* Decode line number information if present. We do this before
5649 processing child DIEs, so that the line header table is available
5650 for DW_AT_decl_file. */
5651 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 1);
5653 /* Process all dies in compilation unit. */
5654 if (die
->child
!= NULL
)
5656 child_die
= die
->child
;
5657 while (child_die
&& child_die
->tag
)
5659 process_die (child_die
, cu
);
5660 child_die
= sibling_die (child_die
);
5664 /* Decode macro information, if present. Dwarf 2 macro information
5665 refers to information in the line number info statement program
5666 header, so we can only read it if we've read the header
5668 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
5669 if (attr
&& cu
->line_header
)
5671 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
5672 complaint (&symfile_complaints
,
5673 _("CU refers to both DW_AT_GNU_macros and DW_AT_macro_info"));
5675 dwarf_decode_macros (cu
->line_header
, DW_UNSND (attr
),
5677 &dwarf2_per_objfile
->macro
, 1);
5681 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5682 if (attr
&& cu
->line_header
)
5684 unsigned int macro_offset
= DW_UNSND (attr
);
5686 dwarf_decode_macros (cu
->line_header
, macro_offset
,
5688 &dwarf2_per_objfile
->macinfo
, 0);
5692 do_cleanups (back_to
);
5695 /* Process DW_TAG_type_unit.
5696 For TUs we want to skip the first top level sibling if it's not the
5697 actual type being defined by this TU. In this case the first top
5698 level sibling is there to provide context only. */
5701 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5703 struct objfile
*objfile
= cu
->objfile
;
5704 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5706 struct attribute
*attr
;
5708 char *comp_dir
= NULL
;
5709 struct die_info
*child_die
;
5710 bfd
*abfd
= objfile
->obfd
;
5712 /* start_symtab needs a low pc, but we don't really have one.
5713 Do what read_file_scope would do in the absence of such info. */
5714 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5716 /* Find the filename. Do not use dwarf2_name here, since the filename
5717 is not a source language identifier. */
5718 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5720 name
= DW_STRING (attr
);
5722 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5724 comp_dir
= DW_STRING (attr
);
5725 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5727 comp_dir
= ldirname (name
);
5728 if (comp_dir
!= NULL
)
5729 make_cleanup (xfree
, comp_dir
);
5735 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5737 set_cu_language (DW_UNSND (attr
), cu
);
5739 /* This isn't technically needed today. It is done for symmetry
5740 with read_file_scope. */
5741 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5743 cu
->producer
= DW_STRING (attr
);
5745 /* We assume that we're processing GCC output. */
5746 processing_gcc_compilation
= 2;
5748 processing_has_namespace_info
= 0;
5750 start_symtab (name
, comp_dir
, lowpc
);
5751 record_debugformat ("DWARF 2");
5752 record_producer (cu
->producer
);
5754 /* Decode line number information if present. We do this before
5755 processing child DIEs, so that the line header table is available
5756 for DW_AT_decl_file.
5757 We don't need the pc/line-number mapping for type units. */
5758 handle_DW_AT_stmt_list (die
, cu
, comp_dir
, 0);
5760 /* Process the dies in the type unit. */
5761 if (die
->child
== NULL
)
5763 dump_die_for_error (die
);
5764 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5765 bfd_get_filename (abfd
));
5768 child_die
= die
->child
;
5770 while (child_die
&& child_die
->tag
)
5772 process_die (child_die
, cu
);
5774 child_die
= sibling_die (child_die
);
5777 do_cleanups (back_to
);
5780 /* qsort helper for inherit_abstract_dies. */
5783 unsigned_int_compar (const void *ap
, const void *bp
)
5785 unsigned int a
= *(unsigned int *) ap
;
5786 unsigned int b
= *(unsigned int *) bp
;
5788 return (a
> b
) - (b
> a
);
5791 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5792 Inherit only the children of the DW_AT_abstract_origin DIE not being
5793 already referenced by DW_AT_abstract_origin from the children of the
5797 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5799 struct die_info
*child_die
;
5800 unsigned die_children_count
;
5801 /* CU offsets which were referenced by children of the current DIE. */
5803 unsigned *offsets_end
, *offsetp
;
5804 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5805 struct die_info
*origin_die
;
5806 /* Iterator of the ORIGIN_DIE children. */
5807 struct die_info
*origin_child_die
;
5808 struct cleanup
*cleanups
;
5809 struct attribute
*attr
;
5810 struct dwarf2_cu
*origin_cu
;
5811 struct pending
**origin_previous_list_in_scope
;
5813 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5817 /* Note that following die references may follow to a die in a
5821 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5823 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5825 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5826 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5828 if (die
->tag
!= origin_die
->tag
5829 && !(die
->tag
== DW_TAG_inlined_subroutine
5830 && origin_die
->tag
== DW_TAG_subprogram
))
5831 complaint (&symfile_complaints
,
5832 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5833 die
->offset
, origin_die
->offset
);
5835 child_die
= die
->child
;
5836 die_children_count
= 0;
5837 while (child_die
&& child_die
->tag
)
5839 child_die
= sibling_die (child_die
);
5840 die_children_count
++;
5842 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5843 cleanups
= make_cleanup (xfree
, offsets
);
5845 offsets_end
= offsets
;
5846 child_die
= die
->child
;
5847 while (child_die
&& child_die
->tag
)
5849 /* For each CHILD_DIE, find the corresponding child of
5850 ORIGIN_DIE. If there is more than one layer of
5851 DW_AT_abstract_origin, follow them all; there shouldn't be,
5852 but GCC versions at least through 4.4 generate this (GCC PR
5854 struct die_info
*child_origin_die
= child_die
;
5855 struct dwarf2_cu
*child_origin_cu
= cu
;
5859 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5863 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5867 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5868 counterpart may exist. */
5869 if (child_origin_die
!= child_die
)
5871 if (child_die
->tag
!= child_origin_die
->tag
5872 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5873 && child_origin_die
->tag
== DW_TAG_subprogram
))
5874 complaint (&symfile_complaints
,
5875 _("Child DIE 0x%x and its abstract origin 0x%x have "
5876 "different tags"), child_die
->offset
,
5877 child_origin_die
->offset
);
5878 if (child_origin_die
->parent
!= origin_die
)
5879 complaint (&symfile_complaints
,
5880 _("Child DIE 0x%x and its abstract origin 0x%x have "
5881 "different parents"), child_die
->offset
,
5882 child_origin_die
->offset
);
5884 *offsets_end
++ = child_origin_die
->offset
;
5886 child_die
= sibling_die (child_die
);
5888 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5889 unsigned_int_compar
);
5890 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5891 if (offsetp
[-1] == *offsetp
)
5892 complaint (&symfile_complaints
,
5893 _("Multiple children of DIE 0x%x refer "
5894 "to DIE 0x%x as their abstract origin"),
5895 die
->offset
, *offsetp
);
5898 origin_child_die
= origin_die
->child
;
5899 while (origin_child_die
&& origin_child_die
->tag
)
5901 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5902 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5904 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5906 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5907 process_die (origin_child_die
, origin_cu
);
5909 origin_child_die
= sibling_die (origin_child_die
);
5911 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5913 do_cleanups (cleanups
);
5917 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5919 struct objfile
*objfile
= cu
->objfile
;
5920 struct context_stack
*new;
5923 struct die_info
*child_die
;
5924 struct attribute
*attr
, *call_line
, *call_file
;
5927 struct block
*block
;
5928 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5929 VEC (symbolp
) *template_args
= NULL
;
5930 struct template_symbol
*templ_func
= NULL
;
5934 /* If we do not have call site information, we can't show the
5935 caller of this inlined function. That's too confusing, so
5936 only use the scope for local variables. */
5937 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5938 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5939 if (call_line
== NULL
|| call_file
== NULL
)
5941 read_lexical_block_scope (die
, cu
);
5946 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5948 name
= dwarf2_name (die
, cu
);
5950 /* Ignore functions with missing or empty names. These are actually
5951 illegal according to the DWARF standard. */
5954 complaint (&symfile_complaints
,
5955 _("missing name for subprogram DIE at %d"), die
->offset
);
5959 /* Ignore functions with missing or invalid low and high pc attributes. */
5960 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5962 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5963 if (!attr
|| !DW_UNSND (attr
))
5964 complaint (&symfile_complaints
,
5965 _("cannot get low and high bounds "
5966 "for subprogram DIE at %d"),
5974 /* If we have any template arguments, then we must allocate a
5975 different sort of symbol. */
5976 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5978 if (child_die
->tag
== DW_TAG_template_type_param
5979 || child_die
->tag
== DW_TAG_template_value_param
)
5981 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5982 struct template_symbol
);
5983 templ_func
->base
.is_cplus_template_function
= 1;
5988 new = push_context (0, lowpc
);
5989 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5990 (struct symbol
*) templ_func
);
5992 /* If there is a location expression for DW_AT_frame_base, record
5994 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5996 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5997 expression is being recorded directly in the function's symbol
5998 and not in a separate frame-base object. I guess this hack is
5999 to avoid adding some sort of frame-base adjunct/annex to the
6000 function's symbol :-(. The problem with doing this is that it
6001 results in a function symbol with a location expression that
6002 has nothing to do with the location of the function, ouch! The
6003 relationship should be: a function's symbol has-a frame base; a
6004 frame-base has-a location expression. */
6005 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
6007 cu
->list_in_scope
= &local_symbols
;
6009 if (die
->child
!= NULL
)
6011 child_die
= die
->child
;
6012 while (child_die
&& child_die
->tag
)
6014 if (child_die
->tag
== DW_TAG_template_type_param
6015 || child_die
->tag
== DW_TAG_template_value_param
)
6017 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6020 VEC_safe_push (symbolp
, template_args
, arg
);
6023 process_die (child_die
, cu
);
6024 child_die
= sibling_die (child_die
);
6028 inherit_abstract_dies (die
, cu
);
6030 /* If we have a DW_AT_specification, we might need to import using
6031 directives from the context of the specification DIE. See the
6032 comment in determine_prefix. */
6033 if (cu
->language
== language_cplus
6034 && dwarf2_attr (die
, DW_AT_specification
, cu
))
6036 struct dwarf2_cu
*spec_cu
= cu
;
6037 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
6041 child_die
= spec_die
->child
;
6042 while (child_die
&& child_die
->tag
)
6044 if (child_die
->tag
== DW_TAG_imported_module
)
6045 process_die (child_die
, spec_cu
);
6046 child_die
= sibling_die (child_die
);
6049 /* In some cases, GCC generates specification DIEs that
6050 themselves contain DW_AT_specification attributes. */
6051 spec_die
= die_specification (spec_die
, &spec_cu
);
6055 new = pop_context ();
6056 /* Make a block for the local symbols within. */
6057 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
6058 lowpc
, highpc
, objfile
);
6060 /* For C++, set the block's scope. */
6061 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
6062 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
6063 determine_prefix (die
, cu
),
6064 processing_has_namespace_info
);
6066 /* If we have address ranges, record them. */
6067 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
6069 /* Attach template arguments to function. */
6070 if (! VEC_empty (symbolp
, template_args
))
6072 gdb_assert (templ_func
!= NULL
);
6074 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
6075 templ_func
->template_arguments
6076 = obstack_alloc (&objfile
->objfile_obstack
,
6077 (templ_func
->n_template_arguments
6078 * sizeof (struct symbol
*)));
6079 memcpy (templ_func
->template_arguments
,
6080 VEC_address (symbolp
, template_args
),
6081 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
6082 VEC_free (symbolp
, template_args
);
6085 /* In C++, we can have functions nested inside functions (e.g., when
6086 a function declares a class that has methods). This means that
6087 when we finish processing a function scope, we may need to go
6088 back to building a containing block's symbol lists. */
6089 local_symbols
= new->locals
;
6090 param_symbols
= new->params
;
6091 using_directives
= new->using_directives
;
6093 /* If we've finished processing a top-level function, subsequent
6094 symbols go in the file symbol list. */
6095 if (outermost_context_p ())
6096 cu
->list_in_scope
= &file_symbols
;
6099 /* Process all the DIES contained within a lexical block scope. Start
6100 a new scope, process the dies, and then close the scope. */
6103 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6105 struct objfile
*objfile
= cu
->objfile
;
6106 struct context_stack
*new;
6107 CORE_ADDR lowpc
, highpc
;
6108 struct die_info
*child_die
;
6111 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6113 /* Ignore blocks with missing or invalid low and high pc attributes. */
6114 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
6115 as multiple lexical blocks? Handling children in a sane way would
6116 be nasty. Might be easier to properly extend generic blocks to
6118 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
6123 push_context (0, lowpc
);
6124 if (die
->child
!= NULL
)
6126 child_die
= die
->child
;
6127 while (child_die
&& child_die
->tag
)
6129 process_die (child_die
, cu
);
6130 child_die
= sibling_die (child_die
);
6133 new = pop_context ();
6135 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
6138 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
6141 /* Note that recording ranges after traversing children, as we
6142 do here, means that recording a parent's ranges entails
6143 walking across all its children's ranges as they appear in
6144 the address map, which is quadratic behavior.
6146 It would be nicer to record the parent's ranges before
6147 traversing its children, simply overriding whatever you find
6148 there. But since we don't even decide whether to create a
6149 block until after we've traversed its children, that's hard
6151 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
6153 local_symbols
= new->locals
;
6154 using_directives
= new->using_directives
;
6157 /* Read in DW_TAG_GNU_call_site and insert it to CU->call_site_htab. */
6160 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6162 struct objfile
*objfile
= cu
->objfile
;
6163 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6164 CORE_ADDR pc
, baseaddr
;
6165 struct attribute
*attr
;
6166 struct call_site
*call_site
, call_site_local
;
6169 struct die_info
*child_die
;
6171 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6173 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6176 complaint (&symfile_complaints
,
6177 _("missing DW_AT_low_pc for DW_TAG_GNU_call_site "
6178 "DIE 0x%x [in module %s]"),
6179 die
->offset
, objfile
->name
);
6182 pc
= DW_ADDR (attr
) + baseaddr
;
6184 if (cu
->call_site_htab
== NULL
)
6185 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
6186 NULL
, &objfile
->objfile_obstack
,
6187 hashtab_obstack_allocate
, NULL
);
6188 call_site_local
.pc
= pc
;
6189 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
6192 complaint (&symfile_complaints
,
6193 _("Duplicate PC %s for DW_TAG_GNU_call_site "
6194 "DIE 0x%x [in module %s]"),
6195 paddress (gdbarch
, pc
), die
->offset
, objfile
->name
);
6199 /* Count parameters at the caller. */
6202 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
6203 child_die
= sibling_die (child_die
))
6205 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
6207 complaint (&symfile_complaints
,
6208 _("Tag %d is not DW_TAG_GNU_call_site_parameter in "
6209 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6210 child_die
->tag
, child_die
->offset
, objfile
->name
);
6217 call_site
= obstack_alloc (&objfile
->objfile_obstack
,
6218 (sizeof (*call_site
)
6219 + (sizeof (*call_site
->parameter
)
6222 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
6225 if (dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
6227 struct die_info
*func_die
;
6229 /* Skip also over DW_TAG_inlined_subroutine. */
6230 for (func_die
= die
->parent
;
6231 func_die
&& func_die
->tag
!= DW_TAG_subprogram
6232 && func_die
->tag
!= DW_TAG_subroutine_type
;
6233 func_die
= func_die
->parent
);
6235 /* DW_AT_GNU_all_call_sites is a superset
6236 of DW_AT_GNU_all_tail_call_sites. */
6238 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
6239 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
6241 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
6242 not complete. But keep CALL_SITE for look ups via call_site_htab,
6243 both the initial caller containing the real return address PC and
6244 the final callee containing the current PC of a chain of tail
6245 calls do not need to have the tail call list complete. But any
6246 function candidate for a virtual tail call frame searched via
6247 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
6248 determined unambiguously. */
6252 struct type
*func_type
= NULL
;
6255 func_type
= get_die_type (func_die
, cu
);
6256 if (func_type
!= NULL
)
6258 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
6260 /* Enlist this call site to the function. */
6261 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
6262 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
6265 complaint (&symfile_complaints
,
6266 _("Cannot find function owning DW_TAG_GNU_call_site "
6267 "DIE 0x%x [in module %s]"),
6268 die
->offset
, objfile
->name
);
6272 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
6274 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
6275 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
6276 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
6277 /* Keep NULL DWARF_BLOCK. */;
6278 else if (attr_form_is_block (attr
))
6280 struct dwarf2_locexpr_baton
*dlbaton
;
6282 dlbaton
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*dlbaton
));
6283 dlbaton
->data
= DW_BLOCK (attr
)->data
;
6284 dlbaton
->size
= DW_BLOCK (attr
)->size
;
6285 dlbaton
->per_cu
= cu
->per_cu
;
6287 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
6289 else if (is_ref_attr (attr
))
6291 struct dwarf2_cu
*target_cu
= cu
;
6292 struct die_info
*target_die
;
6294 target_die
= follow_die_ref_or_sig (die
, attr
, &target_cu
);
6295 gdb_assert (target_cu
->objfile
== objfile
);
6296 if (die_is_declaration (target_die
, target_cu
))
6298 const char *target_physname
;
6300 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
6301 if (target_physname
== NULL
)
6302 complaint (&symfile_complaints
,
6303 _("DW_AT_GNU_call_site_target target DIE has invalid "
6304 "physname, for referencing DIE 0x%x [in module %s]"),
6305 die
->offset
, objfile
->name
);
6307 SET_FIELD_PHYSNAME (call_site
->target
, (char *) target_physname
);
6313 /* DW_AT_entry_pc should be preferred. */
6314 if (!dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
))
6315 complaint (&symfile_complaints
,
6316 _("DW_AT_GNU_call_site_target target DIE has invalid "
6317 "low pc, for referencing DIE 0x%x [in module %s]"),
6318 die
->offset
, objfile
->name
);
6320 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
+ baseaddr
);
6324 complaint (&symfile_complaints
,
6325 _("DW_TAG_GNU_call_site DW_AT_GNU_call_site_target is neither "
6326 "block nor reference, for DIE 0x%x [in module %s]"),
6327 die
->offset
, objfile
->name
);
6329 call_site
->per_cu
= cu
->per_cu
;
6331 for (child_die
= die
->child
;
6332 child_die
&& child_die
->tag
;
6333 child_die
= sibling_die (child_die
))
6335 struct dwarf2_locexpr_baton
*dlbaton
;
6336 struct call_site_parameter
*parameter
;
6338 if (child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
6340 /* Already printed the complaint above. */
6344 gdb_assert (call_site
->parameter_count
< nparams
);
6345 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
6347 /* DW_AT_location specifies the register number. Value of the data
6348 assumed for the register is contained in DW_AT_GNU_call_site_value. */
6350 attr
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
6351 if (!attr
|| !attr_form_is_block (attr
))
6353 complaint (&symfile_complaints
,
6354 _("No DW_FORM_block* DW_AT_location for "
6355 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6356 child_die
->offset
, objfile
->name
);
6359 parameter
->dwarf_reg
= dwarf_block_to_dwarf_reg (DW_BLOCK (attr
)->data
,
6360 &DW_BLOCK (attr
)->data
[DW_BLOCK (attr
)->size
]);
6361 if (parameter
->dwarf_reg
== -1
6362 && !dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (attr
)->data
,
6363 &DW_BLOCK (attr
)->data
[DW_BLOCK (attr
)->size
],
6364 ¶meter
->fb_offset
))
6366 complaint (&symfile_complaints
,
6367 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
6368 "for DW_FORM_block* DW_AT_location for "
6369 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6370 child_die
->offset
, objfile
->name
);
6374 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
6375 if (!attr_form_is_block (attr
))
6377 complaint (&symfile_complaints
,
6378 _("No DW_FORM_block* DW_AT_GNU_call_site_value for "
6379 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6380 child_die
->offset
, objfile
->name
);
6383 parameter
->value
= DW_BLOCK (attr
)->data
;
6384 parameter
->value_size
= DW_BLOCK (attr
)->size
;
6386 /* Parameters are not pre-cleared by memset above. */
6387 parameter
->data_value
= NULL
;
6388 parameter
->data_value_size
= 0;
6389 call_site
->parameter_count
++;
6391 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
6394 if (!attr_form_is_block (attr
))
6395 complaint (&symfile_complaints
,
6396 _("No DW_FORM_block* DW_AT_GNU_call_site_data_value for "
6397 "DW_TAG_GNU_call_site child DIE 0x%x [in module %s]"),
6398 child_die
->offset
, objfile
->name
);
6401 parameter
->data_value
= DW_BLOCK (attr
)->data
;
6402 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
6408 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
6409 Return 1 if the attributes are present and valid, otherwise, return 0.
6410 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
6413 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
6414 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
6415 struct partial_symtab
*ranges_pst
)
6417 struct objfile
*objfile
= cu
->objfile
;
6418 struct comp_unit_head
*cu_header
= &cu
->header
;
6419 bfd
*obfd
= objfile
->obfd
;
6420 unsigned int addr_size
= cu_header
->addr_size
;
6421 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
6422 /* Base address selection entry. */
6433 found_base
= cu
->base_known
;
6434 base
= cu
->base_address
;
6436 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
6437 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
6439 complaint (&symfile_complaints
,
6440 _("Offset %d out of bounds for DW_AT_ranges attribute"),
6444 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
6446 /* Read in the largest possible address. */
6447 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
6448 if ((marker
& mask
) == mask
)
6450 /* If we found the largest possible address, then
6451 read the base address. */
6452 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
6453 buffer
+= 2 * addr_size
;
6454 offset
+= 2 * addr_size
;
6460 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6464 CORE_ADDR range_beginning
, range_end
;
6466 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
6467 buffer
+= addr_size
;
6468 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
6469 buffer
+= addr_size
;
6470 offset
+= 2 * addr_size
;
6472 /* An end of list marker is a pair of zero addresses. */
6473 if (range_beginning
== 0 && range_end
== 0)
6474 /* Found the end of list entry. */
6477 /* Each base address selection entry is a pair of 2 values.
6478 The first is the largest possible address, the second is
6479 the base address. Check for a base address here. */
6480 if ((range_beginning
& mask
) == mask
)
6482 /* If we found the largest possible address, then
6483 read the base address. */
6484 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
6491 /* We have no valid base address for the ranges
6493 complaint (&symfile_complaints
,
6494 _("Invalid .debug_ranges data (no base address)"));
6498 if (range_beginning
> range_end
)
6500 /* Inverted range entries are invalid. */
6501 complaint (&symfile_complaints
,
6502 _("Invalid .debug_ranges data (inverted range)"));
6506 /* Empty range entries have no effect. */
6507 if (range_beginning
== range_end
)
6510 range_beginning
+= base
;
6513 if (ranges_pst
!= NULL
)
6514 addrmap_set_empty (objfile
->psymtabs_addrmap
,
6515 range_beginning
+ baseaddr
,
6516 range_end
- 1 + baseaddr
,
6519 /* FIXME: This is recording everything as a low-high
6520 segment of consecutive addresses. We should have a
6521 data structure for discontiguous block ranges
6525 low
= range_beginning
;
6531 if (range_beginning
< low
)
6532 low
= range_beginning
;
6533 if (range_end
> high
)
6539 /* If the first entry is an end-of-list marker, the range
6540 describes an empty scope, i.e. no instructions. */
6546 *high_return
= high
;
6550 /* Get low and high pc attributes from a die. Return 1 if the attributes
6551 are present and valid, otherwise, return 0. Return -1 if the range is
6552 discontinuous, i.e. derived from DW_AT_ranges information. */
6554 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
6555 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
6556 struct partial_symtab
*pst
)
6558 struct attribute
*attr
;
6563 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
6566 high
= DW_ADDR (attr
);
6567 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6569 low
= DW_ADDR (attr
);
6571 /* Found high w/o low attribute. */
6574 /* Found consecutive range of addresses. */
6579 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
6582 /* Value of the DW_AT_ranges attribute is the offset in the
6583 .debug_ranges section. */
6584 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
6586 /* Found discontinuous range of addresses. */
6591 /* read_partial_die has also the strict LOW < HIGH requirement. */
6595 /* When using the GNU linker, .gnu.linkonce. sections are used to
6596 eliminate duplicate copies of functions and vtables and such.
6597 The linker will arbitrarily choose one and discard the others.
6598 The AT_*_pc values for such functions refer to local labels in
6599 these sections. If the section from that file was discarded, the
6600 labels are not in the output, so the relocs get a value of 0.
6601 If this is a discarded function, mark the pc bounds as invalid,
6602 so that GDB will ignore it. */
6603 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
6612 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
6613 its low and high PC addresses. Do nothing if these addresses could not
6614 be determined. Otherwise, set LOWPC to the low address if it is smaller,
6615 and HIGHPC to the high address if greater than HIGHPC. */
6618 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
6619 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6620 struct dwarf2_cu
*cu
)
6622 CORE_ADDR low
, high
;
6623 struct die_info
*child
= die
->child
;
6625 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
6627 *lowpc
= min (*lowpc
, low
);
6628 *highpc
= max (*highpc
, high
);
6631 /* If the language does not allow nested subprograms (either inside
6632 subprograms or lexical blocks), we're done. */
6633 if (cu
->language
!= language_ada
)
6636 /* Check all the children of the given DIE. If it contains nested
6637 subprograms, then check their pc bounds. Likewise, we need to
6638 check lexical blocks as well, as they may also contain subprogram
6640 while (child
&& child
->tag
)
6642 if (child
->tag
== DW_TAG_subprogram
6643 || child
->tag
== DW_TAG_lexical_block
)
6644 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
6645 child
= sibling_die (child
);
6649 /* Get the low and high pc's represented by the scope DIE, and store
6650 them in *LOWPC and *HIGHPC. If the correct values can't be
6651 determined, set *LOWPC to -1 and *HIGHPC to 0. */
6654 get_scope_pc_bounds (struct die_info
*die
,
6655 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
6656 struct dwarf2_cu
*cu
)
6658 CORE_ADDR best_low
= (CORE_ADDR
) -1;
6659 CORE_ADDR best_high
= (CORE_ADDR
) 0;
6660 CORE_ADDR current_low
, current_high
;
6662 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
6664 best_low
= current_low
;
6665 best_high
= current_high
;
6669 struct die_info
*child
= die
->child
;
6671 while (child
&& child
->tag
)
6673 switch (child
->tag
) {
6674 case DW_TAG_subprogram
:
6675 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
6677 case DW_TAG_namespace
:
6679 /* FIXME: carlton/2004-01-16: Should we do this for
6680 DW_TAG_class_type/DW_TAG_structure_type, too? I think
6681 that current GCC's always emit the DIEs corresponding
6682 to definitions of methods of classes as children of a
6683 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
6684 the DIEs giving the declarations, which could be
6685 anywhere). But I don't see any reason why the
6686 standards says that they have to be there. */
6687 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
6689 if (current_low
!= ((CORE_ADDR
) -1))
6691 best_low
= min (best_low
, current_low
);
6692 best_high
= max (best_high
, current_high
);
6700 child
= sibling_die (child
);
6705 *highpc
= best_high
;
6708 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
6711 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
6712 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
6714 struct objfile
*objfile
= cu
->objfile
;
6715 struct attribute
*attr
;
6717 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
6720 CORE_ADDR high
= DW_ADDR (attr
);
6722 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6725 CORE_ADDR low
= DW_ADDR (attr
);
6727 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
6731 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
6734 bfd
*obfd
= objfile
->obfd
;
6736 /* The value of the DW_AT_ranges attribute is the offset of the
6737 address range list in the .debug_ranges section. */
6738 unsigned long offset
= DW_UNSND (attr
);
6739 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
6741 /* For some target architectures, but not others, the
6742 read_address function sign-extends the addresses it returns.
6743 To recognize base address selection entries, we need a
6745 unsigned int addr_size
= cu
->header
.addr_size
;
6746 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
6748 /* The base address, to which the next pair is relative. Note
6749 that this 'base' is a DWARF concept: most entries in a range
6750 list are relative, to reduce the number of relocs against the
6751 debugging information. This is separate from this function's
6752 'baseaddr' argument, which GDB uses to relocate debugging
6753 information from a shared library based on the address at
6754 which the library was loaded. */
6755 CORE_ADDR base
= cu
->base_address
;
6756 int base_known
= cu
->base_known
;
6758 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
6759 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
6761 complaint (&symfile_complaints
,
6762 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
6769 unsigned int bytes_read
;
6770 CORE_ADDR start
, end
;
6772 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6773 buffer
+= bytes_read
;
6774 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
6775 buffer
+= bytes_read
;
6777 /* Did we find the end of the range list? */
6778 if (start
== 0 && end
== 0)
6781 /* Did we find a base address selection entry? */
6782 else if ((start
& base_select_mask
) == base_select_mask
)
6788 /* We found an ordinary address range. */
6793 complaint (&symfile_complaints
,
6794 _("Invalid .debug_ranges data "
6795 "(no base address)"));
6801 /* Inverted range entries are invalid. */
6802 complaint (&symfile_complaints
,
6803 _("Invalid .debug_ranges data "
6804 "(inverted range)"));
6808 /* Empty range entries have no effect. */
6812 record_block_range (block
,
6813 baseaddr
+ base
+ start
,
6814 baseaddr
+ base
+ end
- 1);
6820 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
6821 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
6822 during 4.6.0 experimental. */
6825 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
6828 int major
, minor
, release
;
6830 if (cu
->producer
== NULL
)
6832 /* For unknown compilers expect their behavior is DWARF version
6835 GCC started to support .debug_types sections by -gdwarf-4 since
6836 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
6837 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
6838 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
6839 interpreted incorrectly by GDB now - GCC PR debug/48229. */
6844 /* Skip any identifier after "GNU " - such as "C++" or "Java". */
6846 if (strncmp (cu
->producer
, "GNU ", strlen ("GNU ")) != 0)
6848 /* For non-GCC compilers expect their behavior is DWARF version
6853 cs
= &cu
->producer
[strlen ("GNU ")];
6854 while (*cs
&& !isdigit (*cs
))
6856 if (sscanf (cs
, "%d.%d.%d", &major
, &minor
, &release
) != 3)
6858 /* Not recognized as GCC. */
6863 return major
< 4 || (major
== 4 && minor
< 6);
6866 /* Return the default accessibility type if it is not overriden by
6867 DW_AT_accessibility. */
6869 static enum dwarf_access_attribute
6870 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
6872 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
6874 /* The default DWARF 2 accessibility for members is public, the default
6875 accessibility for inheritance is private. */
6877 if (die
->tag
!= DW_TAG_inheritance
)
6878 return DW_ACCESS_public
;
6880 return DW_ACCESS_private
;
6884 /* DWARF 3+ defines the default accessibility a different way. The same
6885 rules apply now for DW_TAG_inheritance as for the members and it only
6886 depends on the container kind. */
6888 if (die
->parent
->tag
== DW_TAG_class_type
)
6889 return DW_ACCESS_private
;
6891 return DW_ACCESS_public
;
6895 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
6896 offset. If the attribute was not found return 0, otherwise return
6897 1. If it was found but could not properly be handled, set *OFFSET
6901 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
6904 struct attribute
*attr
;
6906 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6911 /* Note that we do not check for a section offset first here.
6912 This is because DW_AT_data_member_location is new in DWARF 4,
6913 so if we see it, we can assume that a constant form is really
6914 a constant and not a section offset. */
6915 if (attr_form_is_constant (attr
))
6916 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
6917 else if (attr_form_is_section_offset (attr
))
6918 dwarf2_complex_location_expr_complaint ();
6919 else if (attr_form_is_block (attr
))
6920 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6922 dwarf2_complex_location_expr_complaint ();
6930 /* Add an aggregate field to the field list. */
6933 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6934 struct dwarf2_cu
*cu
)
6936 struct objfile
*objfile
= cu
->objfile
;
6937 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6938 struct nextfield
*new_field
;
6939 struct attribute
*attr
;
6941 char *fieldname
= "";
6943 /* Allocate a new field list entry and link it in. */
6944 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6945 make_cleanup (xfree
, new_field
);
6946 memset (new_field
, 0, sizeof (struct nextfield
));
6948 if (die
->tag
== DW_TAG_inheritance
)
6950 new_field
->next
= fip
->baseclasses
;
6951 fip
->baseclasses
= new_field
;
6955 new_field
->next
= fip
->fields
;
6956 fip
->fields
= new_field
;
6960 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6962 new_field
->accessibility
= DW_UNSND (attr
);
6964 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
6965 if (new_field
->accessibility
!= DW_ACCESS_public
)
6966 fip
->non_public_fields
= 1;
6968 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6970 new_field
->virtuality
= DW_UNSND (attr
);
6972 new_field
->virtuality
= DW_VIRTUALITY_none
;
6974 fp
= &new_field
->field
;
6976 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6980 /* Data member other than a C++ static data member. */
6982 /* Get type of field. */
6983 fp
->type
= die_type (die
, cu
);
6985 SET_FIELD_BITPOS (*fp
, 0);
6987 /* Get bit size of field (zero if none). */
6988 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6991 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6995 FIELD_BITSIZE (*fp
) = 0;
6998 /* Get bit offset of field. */
6999 if (handle_data_member_location (die
, cu
, &offset
))
7000 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
7001 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
7004 if (gdbarch_bits_big_endian (gdbarch
))
7006 /* For big endian bits, the DW_AT_bit_offset gives the
7007 additional bit offset from the MSB of the containing
7008 anonymous object to the MSB of the field. We don't
7009 have to do anything special since we don't need to
7010 know the size of the anonymous object. */
7011 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
7015 /* For little endian bits, compute the bit offset to the
7016 MSB of the anonymous object, subtract off the number of
7017 bits from the MSB of the field to the MSB of the
7018 object, and then subtract off the number of bits of
7019 the field itself. The result is the bit offset of
7020 the LSB of the field. */
7022 int bit_offset
= DW_UNSND (attr
);
7024 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7027 /* The size of the anonymous object containing
7028 the bit field is explicit, so use the
7029 indicated size (in bytes). */
7030 anonymous_size
= DW_UNSND (attr
);
7034 /* The size of the anonymous object containing
7035 the bit field must be inferred from the type
7036 attribute of the data member containing the
7038 anonymous_size
= TYPE_LENGTH (fp
->type
);
7040 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
7041 - bit_offset
- FIELD_BITSIZE (*fp
);
7045 /* Get name of field. */
7046 fieldname
= dwarf2_name (die
, cu
);
7047 if (fieldname
== NULL
)
7050 /* The name is already allocated along with this objfile, so we don't
7051 need to duplicate it for the type. */
7052 fp
->name
= fieldname
;
7054 /* Change accessibility for artificial fields (e.g. virtual table
7055 pointer or virtual base class pointer) to private. */
7056 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
7058 FIELD_ARTIFICIAL (*fp
) = 1;
7059 new_field
->accessibility
= DW_ACCESS_private
;
7060 fip
->non_public_fields
= 1;
7063 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
7065 /* C++ static member. */
7067 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
7068 is a declaration, but all versions of G++ as of this writing
7069 (so through at least 3.2.1) incorrectly generate
7070 DW_TAG_variable tags. */
7072 const char *physname
;
7074 /* Get name of field. */
7075 fieldname
= dwarf2_name (die
, cu
);
7076 if (fieldname
== NULL
)
7079 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7081 /* Only create a symbol if this is an external value.
7082 new_symbol checks this and puts the value in the global symbol
7083 table, which we want. If it is not external, new_symbol
7084 will try to put the value in cu->list_in_scope which is wrong. */
7085 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
7087 /* A static const member, not much different than an enum as far as
7088 we're concerned, except that we can support more types. */
7089 new_symbol (die
, NULL
, cu
);
7092 /* Get physical name. */
7093 physname
= dwarf2_physname (fieldname
, die
, cu
);
7095 /* The name is already allocated along with this objfile, so we don't
7096 need to duplicate it for the type. */
7097 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
7098 FIELD_TYPE (*fp
) = die_type (die
, cu
);
7099 FIELD_NAME (*fp
) = fieldname
;
7101 else if (die
->tag
== DW_TAG_inheritance
)
7105 /* C++ base class field. */
7106 if (handle_data_member_location (die
, cu
, &offset
))
7107 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
7108 FIELD_BITSIZE (*fp
) = 0;
7109 FIELD_TYPE (*fp
) = die_type (die
, cu
);
7110 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
7111 fip
->nbaseclasses
++;
7115 /* Add a typedef defined in the scope of the FIP's class. */
7118 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
7119 struct dwarf2_cu
*cu
)
7121 struct objfile
*objfile
= cu
->objfile
;
7122 struct typedef_field_list
*new_field
;
7123 struct attribute
*attr
;
7124 struct typedef_field
*fp
;
7125 char *fieldname
= "";
7127 /* Allocate a new field list entry and link it in. */
7128 new_field
= xzalloc (sizeof (*new_field
));
7129 make_cleanup (xfree
, new_field
);
7131 gdb_assert (die
->tag
== DW_TAG_typedef
);
7133 fp
= &new_field
->field
;
7135 /* Get name of field. */
7136 fp
->name
= dwarf2_name (die
, cu
);
7137 if (fp
->name
== NULL
)
7140 fp
->type
= read_type_die (die
, cu
);
7142 new_field
->next
= fip
->typedef_field_list
;
7143 fip
->typedef_field_list
= new_field
;
7144 fip
->typedef_field_list_count
++;
7147 /* Create the vector of fields, and attach it to the type. */
7150 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
7151 struct dwarf2_cu
*cu
)
7153 int nfields
= fip
->nfields
;
7155 /* Record the field count, allocate space for the array of fields,
7156 and create blank accessibility bitfields if necessary. */
7157 TYPE_NFIELDS (type
) = nfields
;
7158 TYPE_FIELDS (type
) = (struct field
*)
7159 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
7160 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
7162 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
7164 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7166 TYPE_FIELD_PRIVATE_BITS (type
) =
7167 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
7168 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
7170 TYPE_FIELD_PROTECTED_BITS (type
) =
7171 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
7172 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
7174 TYPE_FIELD_IGNORE_BITS (type
) =
7175 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
7176 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
7179 /* If the type has baseclasses, allocate and clear a bit vector for
7180 TYPE_FIELD_VIRTUAL_BITS. */
7181 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
7183 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
7184 unsigned char *pointer
;
7186 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7187 pointer
= TYPE_ALLOC (type
, num_bytes
);
7188 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
7189 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
7190 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
7193 /* Copy the saved-up fields into the field vector. Start from the head of
7194 the list, adding to the tail of the field array, so that they end up in
7195 the same order in the array in which they were added to the list. */
7196 while (nfields
-- > 0)
7198 struct nextfield
*fieldp
;
7202 fieldp
= fip
->fields
;
7203 fip
->fields
= fieldp
->next
;
7207 fieldp
= fip
->baseclasses
;
7208 fip
->baseclasses
= fieldp
->next
;
7211 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
7212 switch (fieldp
->accessibility
)
7214 case DW_ACCESS_private
:
7215 if (cu
->language
!= language_ada
)
7216 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
7219 case DW_ACCESS_protected
:
7220 if (cu
->language
!= language_ada
)
7221 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
7224 case DW_ACCESS_public
:
7228 /* Unknown accessibility. Complain and treat it as public. */
7230 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
7231 fieldp
->accessibility
);
7235 if (nfields
< fip
->nbaseclasses
)
7237 switch (fieldp
->virtuality
)
7239 case DW_VIRTUALITY_virtual
:
7240 case DW_VIRTUALITY_pure_virtual
:
7241 if (cu
->language
== language_ada
)
7242 error (_("unexpected virtuality in component of Ada type"));
7243 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
7250 /* Add a member function to the proper fieldlist. */
7253 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
7254 struct type
*type
, struct dwarf2_cu
*cu
)
7256 struct objfile
*objfile
= cu
->objfile
;
7257 struct attribute
*attr
;
7258 struct fnfieldlist
*flp
;
7260 struct fn_field
*fnp
;
7262 struct nextfnfield
*new_fnfield
;
7263 struct type
*this_type
;
7264 enum dwarf_access_attribute accessibility
;
7266 if (cu
->language
== language_ada
)
7267 error (_("unexpected member function in Ada type"));
7269 /* Get name of member function. */
7270 fieldname
= dwarf2_name (die
, cu
);
7271 if (fieldname
== NULL
)
7274 /* Look up member function name in fieldlist. */
7275 for (i
= 0; i
< fip
->nfnfields
; i
++)
7277 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
7281 /* Create new list element if necessary. */
7282 if (i
< fip
->nfnfields
)
7283 flp
= &fip
->fnfieldlists
[i
];
7286 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7288 fip
->fnfieldlists
= (struct fnfieldlist
*)
7289 xrealloc (fip
->fnfieldlists
,
7290 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
7291 * sizeof (struct fnfieldlist
));
7292 if (fip
->nfnfields
== 0)
7293 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
7295 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
7296 flp
->name
= fieldname
;
7299 i
= fip
->nfnfields
++;
7302 /* Create a new member function field and chain it to the field list
7304 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
7305 make_cleanup (xfree
, new_fnfield
);
7306 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
7307 new_fnfield
->next
= flp
->head
;
7308 flp
->head
= new_fnfield
;
7311 /* Fill in the member function field info. */
7312 fnp
= &new_fnfield
->fnfield
;
7314 /* Delay processing of the physname until later. */
7315 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
7317 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
7322 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
7323 fnp
->physname
= physname
? physname
: "";
7326 fnp
->type
= alloc_type (objfile
);
7327 this_type
= read_type_die (die
, cu
);
7328 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
7330 int nparams
= TYPE_NFIELDS (this_type
);
7332 /* TYPE is the domain of this method, and THIS_TYPE is the type
7333 of the method itself (TYPE_CODE_METHOD). */
7334 smash_to_method_type (fnp
->type
, type
,
7335 TYPE_TARGET_TYPE (this_type
),
7336 TYPE_FIELDS (this_type
),
7337 TYPE_NFIELDS (this_type
),
7338 TYPE_VARARGS (this_type
));
7340 /* Handle static member functions.
7341 Dwarf2 has no clean way to discern C++ static and non-static
7342 member functions. G++ helps GDB by marking the first
7343 parameter for non-static member functions (which is the this
7344 pointer) as artificial. We obtain this information from
7345 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
7346 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
7347 fnp
->voffset
= VOFFSET_STATIC
;
7350 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
7351 dwarf2_full_name (fieldname
, die
, cu
));
7353 /* Get fcontext from DW_AT_containing_type if present. */
7354 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
7355 fnp
->fcontext
= die_containing_type (die
, cu
);
7357 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
7358 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
7360 /* Get accessibility. */
7361 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
7363 accessibility
= DW_UNSND (attr
);
7365 accessibility
= dwarf2_default_access_attribute (die
, cu
);
7366 switch (accessibility
)
7368 case DW_ACCESS_private
:
7369 fnp
->is_private
= 1;
7371 case DW_ACCESS_protected
:
7372 fnp
->is_protected
= 1;
7376 /* Check for artificial methods. */
7377 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
7378 if (attr
&& DW_UNSND (attr
) != 0)
7379 fnp
->is_artificial
= 1;
7381 /* Get index in virtual function table if it is a virtual member
7382 function. For older versions of GCC, this is an offset in the
7383 appropriate virtual table, as specified by DW_AT_containing_type.
7384 For everyone else, it is an expression to be evaluated relative
7385 to the object address. */
7387 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
7390 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
7392 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
7394 /* Old-style GCC. */
7395 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
7397 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
7398 || (DW_BLOCK (attr
)->size
> 1
7399 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
7400 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
7402 struct dwarf_block blk
;
7405 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
7407 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
7408 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
7409 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7410 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
7411 dwarf2_complex_location_expr_complaint ();
7413 fnp
->voffset
/= cu
->header
.addr_size
;
7417 dwarf2_complex_location_expr_complaint ();
7420 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
7422 else if (attr_form_is_section_offset (attr
))
7424 dwarf2_complex_location_expr_complaint ();
7428 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
7434 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
7435 if (attr
&& DW_UNSND (attr
))
7437 /* GCC does this, as of 2008-08-25; PR debug/37237. */
7438 complaint (&symfile_complaints
,
7439 _("Member function \"%s\" (offset %d) is virtual "
7440 "but the vtable offset is not specified"),
7441 fieldname
, die
->offset
);
7442 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7443 TYPE_CPLUS_DYNAMIC (type
) = 1;
7448 /* Create the vector of member function fields, and attach it to the type. */
7451 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
7452 struct dwarf2_cu
*cu
)
7454 struct fnfieldlist
*flp
;
7457 if (cu
->language
== language_ada
)
7458 error (_("unexpected member functions in Ada type"));
7460 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7461 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
7462 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
7464 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
7466 struct nextfnfield
*nfp
= flp
->head
;
7467 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
7470 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
7471 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
7472 fn_flp
->fn_fields
= (struct fn_field
*)
7473 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
7474 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
7475 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
7478 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
7481 /* Returns non-zero if NAME is the name of a vtable member in CU's
7482 language, zero otherwise. */
7484 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
7486 static const char vptr
[] = "_vptr";
7487 static const char vtable
[] = "vtable";
7489 /* Look for the C++ and Java forms of the vtable. */
7490 if ((cu
->language
== language_java
7491 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
7492 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
7493 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
7499 /* GCC outputs unnamed structures that are really pointers to member
7500 functions, with the ABI-specified layout. If TYPE describes
7501 such a structure, smash it into a member function type.
7503 GCC shouldn't do this; it should just output pointer to member DIEs.
7504 This is GCC PR debug/28767. */
7507 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
7509 struct type
*pfn_type
, *domain_type
, *new_type
;
7511 /* Check for a structure with no name and two children. */
7512 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
7515 /* Check for __pfn and __delta members. */
7516 if (TYPE_FIELD_NAME (type
, 0) == NULL
7517 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
7518 || TYPE_FIELD_NAME (type
, 1) == NULL
7519 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
7522 /* Find the type of the method. */
7523 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
7524 if (pfn_type
== NULL
7525 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
7526 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
7529 /* Look for the "this" argument. */
7530 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
7531 if (TYPE_NFIELDS (pfn_type
) == 0
7532 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
7533 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
7536 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
7537 new_type
= alloc_type (objfile
);
7538 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
7539 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
7540 TYPE_VARARGS (pfn_type
));
7541 smash_to_methodptr_type (type
, new_type
);
7544 /* Called when we find the DIE that starts a structure or union scope
7545 (definition) to create a type for the structure or union. Fill in
7546 the type's name and general properties; the members will not be
7547 processed until process_structure_type.
7549 NOTE: we need to call these functions regardless of whether or not the
7550 DIE has a DW_AT_name attribute, since it might be an anonymous
7551 structure or union. This gets the type entered into our set of
7554 However, if the structure is incomplete (an opaque struct/union)
7555 then suppress creating a symbol table entry for it since gdb only
7556 wants to find the one with the complete definition. Note that if
7557 it is complete, we just call new_symbol, which does it's own
7558 checking about whether the struct/union is anonymous or not (and
7559 suppresses creating a symbol table entry itself). */
7561 static struct type
*
7562 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7564 struct objfile
*objfile
= cu
->objfile
;
7566 struct attribute
*attr
;
7569 /* If the definition of this type lives in .debug_types, read that type.
7570 Don't follow DW_AT_specification though, that will take us back up
7571 the chain and we want to go down. */
7572 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7575 struct dwarf2_cu
*type_cu
= cu
;
7576 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7578 /* We could just recurse on read_structure_type, but we need to call
7579 get_die_type to ensure only one type for this DIE is created.
7580 This is important, for example, because for c++ classes we need
7581 TYPE_NAME set which is only done by new_symbol. Blech. */
7582 type
= read_type_die (type_die
, type_cu
);
7584 /* TYPE_CU may not be the same as CU.
7585 Ensure TYPE is recorded in CU's type_hash table. */
7586 return set_die_type (die
, type
, cu
);
7589 type
= alloc_type (objfile
);
7590 INIT_CPLUS_SPECIFIC (type
);
7592 name
= dwarf2_name (die
, cu
);
7595 if (cu
->language
== language_cplus
7596 || cu
->language
== language_java
)
7598 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
7600 /* dwarf2_full_name might have already finished building the DIE's
7601 type. If so, there is no need to continue. */
7602 if (get_die_type (die
, cu
) != NULL
)
7603 return get_die_type (die
, cu
);
7605 TYPE_TAG_NAME (type
) = full_name
;
7606 if (die
->tag
== DW_TAG_structure_type
7607 || die
->tag
== DW_TAG_class_type
)
7608 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
7612 /* The name is already allocated along with this objfile, so
7613 we don't need to duplicate it for the type. */
7614 TYPE_TAG_NAME (type
) = (char *) name
;
7615 if (die
->tag
== DW_TAG_class_type
)
7616 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
7620 if (die
->tag
== DW_TAG_structure_type
)
7622 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
7624 else if (die
->tag
== DW_TAG_union_type
)
7626 TYPE_CODE (type
) = TYPE_CODE_UNION
;
7630 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
7633 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
7634 TYPE_DECLARED_CLASS (type
) = 1;
7636 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7639 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7643 TYPE_LENGTH (type
) = 0;
7646 TYPE_STUB_SUPPORTED (type
) = 1;
7647 if (die_is_declaration (die
, cu
))
7648 TYPE_STUB (type
) = 1;
7649 else if (attr
== NULL
&& die
->child
== NULL
7650 && producer_is_realview (cu
->producer
))
7651 /* RealView does not output the required DW_AT_declaration
7652 on incomplete types. */
7653 TYPE_STUB (type
) = 1;
7655 /* We need to add the type field to the die immediately so we don't
7656 infinitely recurse when dealing with pointers to the structure
7657 type within the structure itself. */
7658 set_die_type (die
, type
, cu
);
7660 /* set_die_type should be already done. */
7661 set_descriptive_type (type
, die
, cu
);
7666 /* Finish creating a structure or union type, including filling in
7667 its members and creating a symbol for it. */
7670 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7672 struct objfile
*objfile
= cu
->objfile
;
7673 struct die_info
*child_die
= die
->child
;
7676 type
= get_die_type (die
, cu
);
7678 type
= read_structure_type (die
, cu
);
7680 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
7682 struct field_info fi
;
7683 struct die_info
*child_die
;
7684 VEC (symbolp
) *template_args
= NULL
;
7685 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
7687 memset (&fi
, 0, sizeof (struct field_info
));
7689 child_die
= die
->child
;
7691 while (child_die
&& child_die
->tag
)
7693 if (child_die
->tag
== DW_TAG_member
7694 || child_die
->tag
== DW_TAG_variable
)
7696 /* NOTE: carlton/2002-11-05: A C++ static data member
7697 should be a DW_TAG_member that is a declaration, but
7698 all versions of G++ as of this writing (so through at
7699 least 3.2.1) incorrectly generate DW_TAG_variable
7700 tags for them instead. */
7701 dwarf2_add_field (&fi
, child_die
, cu
);
7703 else if (child_die
->tag
== DW_TAG_subprogram
)
7705 /* C++ member function. */
7706 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
7708 else if (child_die
->tag
== DW_TAG_inheritance
)
7710 /* C++ base class field. */
7711 dwarf2_add_field (&fi
, child_die
, cu
);
7713 else if (child_die
->tag
== DW_TAG_typedef
)
7714 dwarf2_add_typedef (&fi
, child_die
, cu
);
7715 else if (child_die
->tag
== DW_TAG_template_type_param
7716 || child_die
->tag
== DW_TAG_template_value_param
)
7718 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
7721 VEC_safe_push (symbolp
, template_args
, arg
);
7724 child_die
= sibling_die (child_die
);
7727 /* Attach template arguments to type. */
7728 if (! VEC_empty (symbolp
, template_args
))
7730 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7731 TYPE_N_TEMPLATE_ARGUMENTS (type
)
7732 = VEC_length (symbolp
, template_args
);
7733 TYPE_TEMPLATE_ARGUMENTS (type
)
7734 = obstack_alloc (&objfile
->objfile_obstack
,
7735 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7736 * sizeof (struct symbol
*)));
7737 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
7738 VEC_address (symbolp
, template_args
),
7739 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
7740 * sizeof (struct symbol
*)));
7741 VEC_free (symbolp
, template_args
);
7744 /* Attach fields and member functions to the type. */
7746 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
7749 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
7751 /* Get the type which refers to the base class (possibly this
7752 class itself) which contains the vtable pointer for the current
7753 class from the DW_AT_containing_type attribute. This use of
7754 DW_AT_containing_type is a GNU extension. */
7756 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
7758 struct type
*t
= die_containing_type (die
, cu
);
7760 TYPE_VPTR_BASETYPE (type
) = t
;
7765 /* Our own class provides vtbl ptr. */
7766 for (i
= TYPE_NFIELDS (t
) - 1;
7767 i
>= TYPE_N_BASECLASSES (t
);
7770 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
7772 if (is_vtable_name (fieldname
, cu
))
7774 TYPE_VPTR_FIELDNO (type
) = i
;
7779 /* Complain if virtual function table field not found. */
7780 if (i
< TYPE_N_BASECLASSES (t
))
7781 complaint (&symfile_complaints
,
7782 _("virtual function table pointer "
7783 "not found when defining class '%s'"),
7784 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
7789 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
7792 else if (cu
->producer
7793 && strncmp (cu
->producer
,
7794 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
7796 /* The IBM XLC compiler does not provide direct indication
7797 of the containing type, but the vtable pointer is
7798 always named __vfp. */
7802 for (i
= TYPE_NFIELDS (type
) - 1;
7803 i
>= TYPE_N_BASECLASSES (type
);
7806 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
7808 TYPE_VPTR_FIELDNO (type
) = i
;
7809 TYPE_VPTR_BASETYPE (type
) = type
;
7816 /* Copy fi.typedef_field_list linked list elements content into the
7817 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
7818 if (fi
.typedef_field_list
)
7820 int i
= fi
.typedef_field_list_count
;
7822 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
7823 TYPE_TYPEDEF_FIELD_ARRAY (type
)
7824 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
7825 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
7827 /* Reverse the list order to keep the debug info elements order. */
7830 struct typedef_field
*dest
, *src
;
7832 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
7833 src
= &fi
.typedef_field_list
->field
;
7834 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
7839 do_cleanups (back_to
);
7841 if (HAVE_CPLUS_STRUCT (type
))
7842 TYPE_CPLUS_REALLY_JAVA (type
) = cu
->language
== language_java
;
7845 quirk_gcc_member_function_pointer (type
, objfile
);
7847 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
7848 snapshots) has been known to create a die giving a declaration
7849 for a class that has, as a child, a die giving a definition for a
7850 nested class. So we have to process our children even if the
7851 current die is a declaration. Normally, of course, a declaration
7852 won't have any children at all. */
7854 while (child_die
!= NULL
&& child_die
->tag
)
7856 if (child_die
->tag
== DW_TAG_member
7857 || child_die
->tag
== DW_TAG_variable
7858 || child_die
->tag
== DW_TAG_inheritance
7859 || child_die
->tag
== DW_TAG_template_value_param
7860 || child_die
->tag
== DW_TAG_template_type_param
)
7865 process_die (child_die
, cu
);
7867 child_die
= sibling_die (child_die
);
7870 /* Do not consider external references. According to the DWARF standard,
7871 these DIEs are identified by the fact that they have no byte_size
7872 attribute, and a declaration attribute. */
7873 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
7874 || !die_is_declaration (die
, cu
))
7875 new_symbol (die
, type
, cu
);
7878 /* Given a DW_AT_enumeration_type die, set its type. We do not
7879 complete the type's fields yet, or create any symbols. */
7881 static struct type
*
7882 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7884 struct objfile
*objfile
= cu
->objfile
;
7886 struct attribute
*attr
;
7889 /* If the definition of this type lives in .debug_types, read that type.
7890 Don't follow DW_AT_specification though, that will take us back up
7891 the chain and we want to go down. */
7892 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7895 struct dwarf2_cu
*type_cu
= cu
;
7896 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7898 type
= read_type_die (type_die
, type_cu
);
7900 /* TYPE_CU may not be the same as CU.
7901 Ensure TYPE is recorded in CU's type_hash table. */
7902 return set_die_type (die
, type
, cu
);
7905 type
= alloc_type (objfile
);
7907 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7908 name
= dwarf2_full_name (NULL
, die
, cu
);
7910 TYPE_TAG_NAME (type
) = (char *) name
;
7912 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7915 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7919 TYPE_LENGTH (type
) = 0;
7922 /* The enumeration DIE can be incomplete. In Ada, any type can be
7923 declared as private in the package spec, and then defined only
7924 inside the package body. Such types are known as Taft Amendment
7925 Types. When another package uses such a type, an incomplete DIE
7926 may be generated by the compiler. */
7927 if (die_is_declaration (die
, cu
))
7928 TYPE_STUB (type
) = 1;
7930 return set_die_type (die
, type
, cu
);
7933 /* Given a pointer to a die which begins an enumeration, process all
7934 the dies that define the members of the enumeration, and create the
7935 symbol for the enumeration type.
7937 NOTE: We reverse the order of the element list. */
7940 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7942 struct type
*this_type
;
7944 this_type
= get_die_type (die
, cu
);
7945 if (this_type
== NULL
)
7946 this_type
= read_enumeration_type (die
, cu
);
7948 if (die
->child
!= NULL
)
7950 struct die_info
*child_die
;
7952 struct field
*fields
= NULL
;
7954 int unsigned_enum
= 1;
7959 child_die
= die
->child
;
7960 while (child_die
&& child_die
->tag
)
7962 if (child_die
->tag
!= DW_TAG_enumerator
)
7964 process_die (child_die
, cu
);
7968 name
= dwarf2_name (child_die
, cu
);
7971 sym
= new_symbol (child_die
, this_type
, cu
);
7972 if (SYMBOL_VALUE (sym
) < 0)
7977 else if ((mask
& SYMBOL_VALUE (sym
)) != 0)
7980 mask
|= SYMBOL_VALUE (sym
);
7982 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7984 fields
= (struct field
*)
7986 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7987 * sizeof (struct field
));
7990 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7991 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7992 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7993 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7999 child_die
= sibling_die (child_die
);
8004 TYPE_NFIELDS (this_type
) = num_fields
;
8005 TYPE_FIELDS (this_type
) = (struct field
*)
8006 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
8007 memcpy (TYPE_FIELDS (this_type
), fields
,
8008 sizeof (struct field
) * num_fields
);
8012 TYPE_UNSIGNED (this_type
) = 1;
8014 TYPE_FLAG_ENUM (this_type
) = 1;
8017 /* If we are reading an enum from a .debug_types unit, and the enum
8018 is a declaration, and the enum is not the signatured type in the
8019 unit, then we do not want to add a symbol for it. Adding a
8020 symbol would in some cases obscure the true definition of the
8021 enum, giving users an incomplete type when the definition is
8022 actually available. Note that we do not want to do this for all
8023 enums which are just declarations, because C++0x allows forward
8024 enum declarations. */
8025 if (cu
->per_cu
->debug_types_section
8026 && die_is_declaration (die
, cu
))
8028 struct signatured_type
*type_sig
;
8031 = lookup_signatured_type_at_offset (dwarf2_per_objfile
->objfile
,
8032 cu
->per_cu
->debug_types_section
,
8033 cu
->per_cu
->offset
);
8034 if (type_sig
->per_cu
.offset
+ type_sig
->type_offset
8039 new_symbol (die
, this_type
, cu
);
8042 /* Extract all information from a DW_TAG_array_type DIE and put it in
8043 the DIE's type field. For now, this only handles one dimensional
8046 static struct type
*
8047 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8049 struct objfile
*objfile
= cu
->objfile
;
8050 struct die_info
*child_die
;
8052 struct type
*element_type
, *range_type
, *index_type
;
8053 struct type
**range_types
= NULL
;
8054 struct attribute
*attr
;
8056 struct cleanup
*back_to
;
8059 element_type
= die_type (die
, cu
);
8061 /* The die_type call above may have already set the type for this DIE. */
8062 type
= get_die_type (die
, cu
);
8066 /* Irix 6.2 native cc creates array types without children for
8067 arrays with unspecified length. */
8068 if (die
->child
== NULL
)
8070 index_type
= objfile_type (objfile
)->builtin_int
;
8071 range_type
= create_range_type (NULL
, index_type
, 0, -1);
8072 type
= create_array_type (NULL
, element_type
, range_type
);
8073 return set_die_type (die
, type
, cu
);
8076 back_to
= make_cleanup (null_cleanup
, NULL
);
8077 child_die
= die
->child
;
8078 while (child_die
&& child_die
->tag
)
8080 if (child_die
->tag
== DW_TAG_subrange_type
)
8082 struct type
*child_type
= read_type_die (child_die
, cu
);
8084 if (child_type
!= NULL
)
8086 /* The range type was succesfully read. Save it for the
8087 array type creation. */
8088 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
8090 range_types
= (struct type
**)
8091 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
8092 * sizeof (struct type
*));
8094 make_cleanup (free_current_contents
, &range_types
);
8096 range_types
[ndim
++] = child_type
;
8099 child_die
= sibling_die (child_die
);
8102 /* Dwarf2 dimensions are output from left to right, create the
8103 necessary array types in backwards order. */
8105 type
= element_type
;
8107 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
8112 type
= create_array_type (NULL
, type
, range_types
[i
++]);
8117 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
8120 /* Understand Dwarf2 support for vector types (like they occur on
8121 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
8122 array type. This is not part of the Dwarf2/3 standard yet, but a
8123 custom vendor extension. The main difference between a regular
8124 array and the vector variant is that vectors are passed by value
8126 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
8128 make_vector_type (type
);
8130 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
8131 implementation may choose to implement triple vectors using this
8133 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8136 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
8137 TYPE_LENGTH (type
) = DW_UNSND (attr
);
8139 complaint (&symfile_complaints
,
8140 _("DW_AT_byte_size for array type smaller "
8141 "than the total size of elements"));
8144 name
= dwarf2_name (die
, cu
);
8146 TYPE_NAME (type
) = name
;
8148 /* Install the type in the die. */
8149 set_die_type (die
, type
, cu
);
8151 /* set_die_type should be already done. */
8152 set_descriptive_type (type
, die
, cu
);
8154 do_cleanups (back_to
);
8159 static enum dwarf_array_dim_ordering
8160 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
8162 struct attribute
*attr
;
8164 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
8166 if (attr
) return DW_SND (attr
);
8168 /* GNU F77 is a special case, as at 08/2004 array type info is the
8169 opposite order to the dwarf2 specification, but data is still
8170 laid out as per normal fortran.
8172 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
8173 version checking. */
8175 if (cu
->language
== language_fortran
8176 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
8178 return DW_ORD_row_major
;
8181 switch (cu
->language_defn
->la_array_ordering
)
8183 case array_column_major
:
8184 return DW_ORD_col_major
;
8185 case array_row_major
:
8187 return DW_ORD_row_major
;
8191 /* Extract all information from a DW_TAG_set_type DIE and put it in
8192 the DIE's type field. */
8194 static struct type
*
8195 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8197 struct type
*domain_type
, *set_type
;
8198 struct attribute
*attr
;
8200 domain_type
= die_type (die
, cu
);
8202 /* The die_type call above may have already set the type for this DIE. */
8203 set_type
= get_die_type (die
, cu
);
8207 set_type
= create_set_type (NULL
, domain_type
);
8209 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8211 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
8213 return set_die_type (die
, set_type
, cu
);
8216 /* First cut: install each common block member as a global variable. */
8219 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
8221 struct die_info
*child_die
;
8222 struct attribute
*attr
;
8224 CORE_ADDR base
= (CORE_ADDR
) 0;
8226 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8229 /* Support the .debug_loc offsets. */
8230 if (attr_form_is_block (attr
))
8232 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
8234 else if (attr_form_is_section_offset (attr
))
8236 dwarf2_complex_location_expr_complaint ();
8240 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8241 "common block member");
8244 if (die
->child
!= NULL
)
8246 child_die
= die
->child
;
8247 while (child_die
&& child_die
->tag
)
8251 sym
= new_symbol (child_die
, NULL
, cu
);
8253 && handle_data_member_location (child_die
, cu
, &offset
))
8255 SYMBOL_VALUE_ADDRESS (sym
) = base
+ offset
;
8256 add_symbol_to_list (sym
, &global_symbols
);
8258 child_die
= sibling_die (child_die
);
8263 /* Create a type for a C++ namespace. */
8265 static struct type
*
8266 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8268 struct objfile
*objfile
= cu
->objfile
;
8269 const char *previous_prefix
, *name
;
8273 /* For extensions, reuse the type of the original namespace. */
8274 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
8276 struct die_info
*ext_die
;
8277 struct dwarf2_cu
*ext_cu
= cu
;
8279 ext_die
= dwarf2_extension (die
, &ext_cu
);
8280 type
= read_type_die (ext_die
, ext_cu
);
8282 /* EXT_CU may not be the same as CU.
8283 Ensure TYPE is recorded in CU's type_hash table. */
8284 return set_die_type (die
, type
, cu
);
8287 name
= namespace_name (die
, &is_anonymous
, cu
);
8289 /* Now build the name of the current namespace. */
8291 previous_prefix
= determine_prefix (die
, cu
);
8292 if (previous_prefix
[0] != '\0')
8293 name
= typename_concat (&objfile
->objfile_obstack
,
8294 previous_prefix
, name
, 0, cu
);
8296 /* Create the type. */
8297 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
8299 TYPE_NAME (type
) = (char *) name
;
8300 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8302 return set_die_type (die
, type
, cu
);
8305 /* Read a C++ namespace. */
8308 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
8310 struct objfile
*objfile
= cu
->objfile
;
8313 /* Add a symbol associated to this if we haven't seen the namespace
8314 before. Also, add a using directive if it's an anonymous
8317 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
8321 type
= read_type_die (die
, cu
);
8322 new_symbol (die
, type
, cu
);
8324 namespace_name (die
, &is_anonymous
, cu
);
8327 const char *previous_prefix
= determine_prefix (die
, cu
);
8329 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
8330 NULL
, NULL
, &objfile
->objfile_obstack
);
8334 if (die
->child
!= NULL
)
8336 struct die_info
*child_die
= die
->child
;
8338 while (child_die
&& child_die
->tag
)
8340 process_die (child_die
, cu
);
8341 child_die
= sibling_die (child_die
);
8346 /* Read a Fortran module as type. This DIE can be only a declaration used for
8347 imported module. Still we need that type as local Fortran "use ... only"
8348 declaration imports depend on the created type in determine_prefix. */
8350 static struct type
*
8351 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8353 struct objfile
*objfile
= cu
->objfile
;
8357 module_name
= dwarf2_name (die
, cu
);
8359 complaint (&symfile_complaints
,
8360 _("DW_TAG_module has no name, offset 0x%x"),
8362 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
8364 /* determine_prefix uses TYPE_TAG_NAME. */
8365 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
8367 return set_die_type (die
, type
, cu
);
8370 /* Read a Fortran module. */
8373 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
8375 struct die_info
*child_die
= die
->child
;
8377 while (child_die
&& child_die
->tag
)
8379 process_die (child_die
, cu
);
8380 child_die
= sibling_die (child_die
);
8384 /* Return the name of the namespace represented by DIE. Set
8385 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
8389 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
8391 struct die_info
*current_die
;
8392 const char *name
= NULL
;
8394 /* Loop through the extensions until we find a name. */
8396 for (current_die
= die
;
8397 current_die
!= NULL
;
8398 current_die
= dwarf2_extension (die
, &cu
))
8400 name
= dwarf2_name (current_die
, cu
);
8405 /* Is it an anonymous namespace? */
8407 *is_anonymous
= (name
== NULL
);
8409 name
= CP_ANONYMOUS_NAMESPACE_STR
;
8414 /* Extract all information from a DW_TAG_pointer_type DIE and add to
8415 the user defined type vector. */
8417 static struct type
*
8418 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8420 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
8421 struct comp_unit_head
*cu_header
= &cu
->header
;
8423 struct attribute
*attr_byte_size
;
8424 struct attribute
*attr_address_class
;
8425 int byte_size
, addr_class
;
8426 struct type
*target_type
;
8428 target_type
= die_type (die
, cu
);
8430 /* The die_type call above may have already set the type for this DIE. */
8431 type
= get_die_type (die
, cu
);
8435 type
= lookup_pointer_type (target_type
);
8437 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8439 byte_size
= DW_UNSND (attr_byte_size
);
8441 byte_size
= cu_header
->addr_size
;
8443 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
8444 if (attr_address_class
)
8445 addr_class
= DW_UNSND (attr_address_class
);
8447 addr_class
= DW_ADDR_none
;
8449 /* If the pointer size or address class is different than the
8450 default, create a type variant marked as such and set the
8451 length accordingly. */
8452 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
8454 if (gdbarch_address_class_type_flags_p (gdbarch
))
8458 type_flags
= gdbarch_address_class_type_flags
8459 (gdbarch
, byte_size
, addr_class
);
8460 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
8462 type
= make_type_with_address_space (type
, type_flags
);
8464 else if (TYPE_LENGTH (type
) != byte_size
)
8466 complaint (&symfile_complaints
,
8467 _("invalid pointer size %d"), byte_size
);
8471 /* Should we also complain about unhandled address classes? */
8475 TYPE_LENGTH (type
) = byte_size
;
8476 return set_die_type (die
, type
, cu
);
8479 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
8480 the user defined type vector. */
8482 static struct type
*
8483 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8486 struct type
*to_type
;
8487 struct type
*domain
;
8489 to_type
= die_type (die
, cu
);
8490 domain
= die_containing_type (die
, cu
);
8492 /* The calls above may have already set the type for this DIE. */
8493 type
= get_die_type (die
, cu
);
8497 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
8498 type
= lookup_methodptr_type (to_type
);
8500 type
= lookup_memberptr_type (to_type
, domain
);
8502 return set_die_type (die
, type
, cu
);
8505 /* Extract all information from a DW_TAG_reference_type DIE and add to
8506 the user defined type vector. */
8508 static struct type
*
8509 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8511 struct comp_unit_head
*cu_header
= &cu
->header
;
8512 struct type
*type
, *target_type
;
8513 struct attribute
*attr
;
8515 target_type
= die_type (die
, cu
);
8517 /* The die_type call above may have already set the type for this DIE. */
8518 type
= get_die_type (die
, cu
);
8522 type
= lookup_reference_type (target_type
);
8523 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8526 TYPE_LENGTH (type
) = DW_UNSND (attr
);
8530 TYPE_LENGTH (type
) = cu_header
->addr_size
;
8532 return set_die_type (die
, type
, cu
);
8535 static struct type
*
8536 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8538 struct type
*base_type
, *cv_type
;
8540 base_type
= die_type (die
, cu
);
8542 /* The die_type call above may have already set the type for this DIE. */
8543 cv_type
= get_die_type (die
, cu
);
8547 /* In case the const qualifier is applied to an array type, the element type
8548 is so qualified, not the array type (section 6.7.3 of C99). */
8549 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
8551 struct type
*el_type
, *inner_array
;
8553 base_type
= copy_type (base_type
);
8554 inner_array
= base_type
;
8556 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
8558 TYPE_TARGET_TYPE (inner_array
) =
8559 copy_type (TYPE_TARGET_TYPE (inner_array
));
8560 inner_array
= TYPE_TARGET_TYPE (inner_array
);
8563 el_type
= TYPE_TARGET_TYPE (inner_array
);
8564 TYPE_TARGET_TYPE (inner_array
) =
8565 make_cv_type (1, TYPE_VOLATILE (el_type
), el_type
, NULL
);
8567 return set_die_type (die
, base_type
, cu
);
8570 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
8571 return set_die_type (die
, cv_type
, cu
);
8574 static struct type
*
8575 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8577 struct type
*base_type
, *cv_type
;
8579 base_type
= die_type (die
, cu
);
8581 /* The die_type call above may have already set the type for this DIE. */
8582 cv_type
= get_die_type (die
, cu
);
8586 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
8587 return set_die_type (die
, cv_type
, cu
);
8590 /* Extract all information from a DW_TAG_string_type DIE and add to
8591 the user defined type vector. It isn't really a user defined type,
8592 but it behaves like one, with other DIE's using an AT_user_def_type
8593 attribute to reference it. */
8595 static struct type
*
8596 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8598 struct objfile
*objfile
= cu
->objfile
;
8599 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8600 struct type
*type
, *range_type
, *index_type
, *char_type
;
8601 struct attribute
*attr
;
8602 unsigned int length
;
8604 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
8607 length
= DW_UNSND (attr
);
8611 /* Check for the DW_AT_byte_size attribute. */
8612 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8615 length
= DW_UNSND (attr
);
8623 index_type
= objfile_type (objfile
)->builtin_int
;
8624 range_type
= create_range_type (NULL
, index_type
, 1, length
);
8625 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
8626 type
= create_string_type (NULL
, char_type
, range_type
);
8628 return set_die_type (die
, type
, cu
);
8631 /* Handle DIES due to C code like:
8635 int (*funcp)(int a, long l);
8639 ('funcp' generates a DW_TAG_subroutine_type DIE). */
8641 static struct type
*
8642 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8644 struct objfile
*objfile
= cu
->objfile
;
8645 struct type
*type
; /* Type that this function returns. */
8646 struct type
*ftype
; /* Function that returns above type. */
8647 struct attribute
*attr
;
8649 type
= die_type (die
, cu
);
8651 /* The die_type call above may have already set the type for this DIE. */
8652 ftype
= get_die_type (die
, cu
);
8656 ftype
= lookup_function_type (type
);
8658 /* All functions in C++, Pascal and Java have prototypes. */
8659 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
8660 if ((attr
&& (DW_UNSND (attr
) != 0))
8661 || cu
->language
== language_cplus
8662 || cu
->language
== language_java
8663 || cu
->language
== language_pascal
)
8664 TYPE_PROTOTYPED (ftype
) = 1;
8665 else if (producer_is_realview (cu
->producer
))
8666 /* RealView does not emit DW_AT_prototyped. We can not
8667 distinguish prototyped and unprototyped functions; default to
8668 prototyped, since that is more common in modern code (and
8669 RealView warns about unprototyped functions). */
8670 TYPE_PROTOTYPED (ftype
) = 1;
8672 /* Store the calling convention in the type if it's available in
8673 the subroutine die. Otherwise set the calling convention to
8674 the default value DW_CC_normal. */
8675 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
8677 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
8678 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
8679 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
8681 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
8683 /* We need to add the subroutine type to the die immediately so
8684 we don't infinitely recurse when dealing with parameters
8685 declared as the same subroutine type. */
8686 set_die_type (die
, ftype
, cu
);
8688 if (die
->child
!= NULL
)
8690 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
8691 struct die_info
*child_die
;
8692 int nparams
, iparams
;
8694 /* Count the number of parameters.
8695 FIXME: GDB currently ignores vararg functions, but knows about
8696 vararg member functions. */
8698 child_die
= die
->child
;
8699 while (child_die
&& child_die
->tag
)
8701 if (child_die
->tag
== DW_TAG_formal_parameter
)
8703 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
8704 TYPE_VARARGS (ftype
) = 1;
8705 child_die
= sibling_die (child_die
);
8708 /* Allocate storage for parameters and fill them in. */
8709 TYPE_NFIELDS (ftype
) = nparams
;
8710 TYPE_FIELDS (ftype
) = (struct field
*)
8711 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
8713 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
8714 even if we error out during the parameters reading below. */
8715 for (iparams
= 0; iparams
< nparams
; iparams
++)
8716 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
8719 child_die
= die
->child
;
8720 while (child_die
&& child_die
->tag
)
8722 if (child_die
->tag
== DW_TAG_formal_parameter
)
8724 struct type
*arg_type
;
8726 /* DWARF version 2 has no clean way to discern C++
8727 static and non-static member functions. G++ helps
8728 GDB by marking the first parameter for non-static
8729 member functions (which is the this pointer) as
8730 artificial. We pass this information to
8731 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
8733 DWARF version 3 added DW_AT_object_pointer, which GCC
8734 4.5 does not yet generate. */
8735 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
8737 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
8740 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
8742 /* GCC/43521: In java, the formal parameter
8743 "this" is sometimes not marked with DW_AT_artificial. */
8744 if (cu
->language
== language_java
)
8746 const char *name
= dwarf2_name (child_die
, cu
);
8748 if (name
&& !strcmp (name
, "this"))
8749 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
8752 arg_type
= die_type (child_die
, cu
);
8754 /* RealView does not mark THIS as const, which the testsuite
8755 expects. GCC marks THIS as const in method definitions,
8756 but not in the class specifications (GCC PR 43053). */
8757 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
8758 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
8761 struct dwarf2_cu
*arg_cu
= cu
;
8762 const char *name
= dwarf2_name (child_die
, cu
);
8764 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
8767 /* If the compiler emits this, use it. */
8768 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
8771 else if (name
&& strcmp (name
, "this") == 0)
8772 /* Function definitions will have the argument names. */
8774 else if (name
== NULL
&& iparams
== 0)
8775 /* Declarations may not have the names, so like
8776 elsewhere in GDB, assume an artificial first
8777 argument is "this". */
8781 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
8785 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
8788 child_die
= sibling_die (child_die
);
8795 static struct type
*
8796 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
8798 struct objfile
*objfile
= cu
->objfile
;
8799 const char *name
= NULL
;
8800 struct type
*this_type
, *target_type
;
8802 name
= dwarf2_full_name (NULL
, die
, cu
);
8803 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
8804 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
8805 TYPE_NAME (this_type
) = (char *) name
;
8806 set_die_type (die
, this_type
, cu
);
8807 target_type
= die_type (die
, cu
);
8808 if (target_type
!= this_type
)
8809 TYPE_TARGET_TYPE (this_type
) = target_type
;
8812 /* Self-referential typedefs are, it seems, not allowed by the DWARF
8813 spec and cause infinite loops in GDB. */
8814 complaint (&symfile_complaints
,
8815 _("Self-referential DW_TAG_typedef "
8816 "- DIE at 0x%x [in module %s]"),
8817 die
->offset
, objfile
->name
);
8818 TYPE_TARGET_TYPE (this_type
) = NULL
;
8823 /* Find a representation of a given base type and install
8824 it in the TYPE field of the die. */
8826 static struct type
*
8827 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8829 struct objfile
*objfile
= cu
->objfile
;
8831 struct attribute
*attr
;
8832 int encoding
= 0, size
= 0;
8834 enum type_code code
= TYPE_CODE_INT
;
8836 struct type
*target_type
= NULL
;
8838 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
8841 encoding
= DW_UNSND (attr
);
8843 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8846 size
= DW_UNSND (attr
);
8848 name
= dwarf2_name (die
, cu
);
8851 complaint (&symfile_complaints
,
8852 _("DW_AT_name missing from DW_TAG_base_type"));
8857 case DW_ATE_address
:
8858 /* Turn DW_ATE_address into a void * pointer. */
8859 code
= TYPE_CODE_PTR
;
8860 type_flags
|= TYPE_FLAG_UNSIGNED
;
8861 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
8863 case DW_ATE_boolean
:
8864 code
= TYPE_CODE_BOOL
;
8865 type_flags
|= TYPE_FLAG_UNSIGNED
;
8867 case DW_ATE_complex_float
:
8868 code
= TYPE_CODE_COMPLEX
;
8869 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
8871 case DW_ATE_decimal_float
:
8872 code
= TYPE_CODE_DECFLOAT
;
8875 code
= TYPE_CODE_FLT
;
8879 case DW_ATE_unsigned
:
8880 type_flags
|= TYPE_FLAG_UNSIGNED
;
8881 if (cu
->language
== language_fortran
8883 && strncmp (name
, "character(", sizeof ("character(") - 1) == 0)
8884 code
= TYPE_CODE_CHAR
;
8886 case DW_ATE_signed_char
:
8887 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8888 || cu
->language
== language_pascal
8889 || cu
->language
== language_fortran
)
8890 code
= TYPE_CODE_CHAR
;
8892 case DW_ATE_unsigned_char
:
8893 if (cu
->language
== language_ada
|| cu
->language
== language_m2
8894 || cu
->language
== language_pascal
8895 || cu
->language
== language_fortran
)
8896 code
= TYPE_CODE_CHAR
;
8897 type_flags
|= TYPE_FLAG_UNSIGNED
;
8900 /* We just treat this as an integer and then recognize the
8901 type by name elsewhere. */
8905 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
8906 dwarf_type_encoding_name (encoding
));
8910 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
8911 TYPE_NAME (type
) = name
;
8912 TYPE_TARGET_TYPE (type
) = target_type
;
8914 if (name
&& strcmp (name
, "char") == 0)
8915 TYPE_NOSIGN (type
) = 1;
8917 return set_die_type (die
, type
, cu
);
8920 /* Read the given DW_AT_subrange DIE. */
8922 static struct type
*
8923 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8925 struct type
*base_type
;
8926 struct type
*range_type
;
8927 struct attribute
*attr
;
8931 LONGEST negative_mask
;
8933 base_type
= die_type (die
, cu
);
8934 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
8935 check_typedef (base_type
);
8937 /* The die_type call above may have already set the type for this DIE. */
8938 range_type
= get_die_type (die
, cu
);
8942 if (cu
->language
== language_fortran
)
8944 /* FORTRAN implies a lower bound of 1, if not given. */
8948 /* FIXME: For variable sized arrays either of these could be
8949 a variable rather than a constant value. We'll allow it,
8950 but we don't know how to handle it. */
8951 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
8953 low
= dwarf2_get_attr_constant_value (attr
, 0);
8955 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
8958 if (attr_form_is_block (attr
) || is_ref_attr (attr
))
8960 /* GCC encodes arrays with unspecified or dynamic length
8961 with a DW_FORM_block1 attribute or a reference attribute.
8962 FIXME: GDB does not yet know how to handle dynamic
8963 arrays properly, treat them as arrays with unspecified
8966 FIXME: jimb/2003-09-22: GDB does not really know
8967 how to handle arrays of unspecified length
8968 either; we just represent them as zero-length
8969 arrays. Choose an appropriate upper bound given
8970 the lower bound we've computed above. */
8974 high
= dwarf2_get_attr_constant_value (attr
, 1);
8978 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8981 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8982 high
= low
+ count
- 1;
8986 /* Unspecified array length. */
8991 /* Dwarf-2 specifications explicitly allows to create subrange types
8992 without specifying a base type.
8993 In that case, the base type must be set to the type of
8994 the lower bound, upper bound or count, in that order, if any of these
8995 three attributes references an object that has a type.
8996 If no base type is found, the Dwarf-2 specifications say that
8997 a signed integer type of size equal to the size of an address should
8999 For the following C code: `extern char gdb_int [];'
9000 GCC produces an empty range DIE.
9001 FIXME: muller/2010-05-28: Possible references to object for low bound,
9002 high bound or count are not yet handled by this code. */
9003 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
9005 struct objfile
*objfile
= cu
->objfile
;
9006 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9007 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
9008 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
9010 /* Test "int", "long int", and "long long int" objfile types,
9011 and select the first one having a size above or equal to the
9012 architecture address size. */
9013 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
9014 base_type
= int_type
;
9017 int_type
= objfile_type (objfile
)->builtin_long
;
9018 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
9019 base_type
= int_type
;
9022 int_type
= objfile_type (objfile
)->builtin_long_long
;
9023 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
9024 base_type
= int_type
;
9030 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
9031 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
9032 low
|= negative_mask
;
9033 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
9034 high
|= negative_mask
;
9036 range_type
= create_range_type (NULL
, base_type
, low
, high
);
9038 /* Mark arrays with dynamic length at least as an array of unspecified
9039 length. GDB could check the boundary but before it gets implemented at
9040 least allow accessing the array elements. */
9041 if (attr
&& attr_form_is_block (attr
))
9042 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
9044 /* Ada expects an empty array on no boundary attributes. */
9045 if (attr
== NULL
&& cu
->language
!= language_ada
)
9046 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
9048 name
= dwarf2_name (die
, cu
);
9050 TYPE_NAME (range_type
) = name
;
9052 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
9054 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
9056 set_die_type (die
, range_type
, cu
);
9058 /* set_die_type should be already done. */
9059 set_descriptive_type (range_type
, die
, cu
);
9064 static struct type
*
9065 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9069 /* For now, we only support the C meaning of an unspecified type: void. */
9071 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
9072 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
9074 return set_die_type (die
, type
, cu
);
9077 /* Trivial hash function for die_info: the hash value of a DIE
9078 is its offset in .debug_info for this objfile. */
9081 die_hash (const void *item
)
9083 const struct die_info
*die
= item
;
9088 /* Trivial comparison function for die_info structures: two DIEs
9089 are equal if they have the same offset. */
9092 die_eq (const void *item_lhs
, const void *item_rhs
)
9094 const struct die_info
*die_lhs
= item_lhs
;
9095 const struct die_info
*die_rhs
= item_rhs
;
9097 return die_lhs
->offset
== die_rhs
->offset
;
9100 /* Read a whole compilation unit into a linked list of dies. */
9102 static struct die_info
*
9103 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9105 struct die_reader_specs reader_specs
;
9106 int read_abbrevs
= 0;
9107 struct cleanup
*back_to
= NULL
;
9108 struct die_info
*die
;
9110 if (cu
->dwarf2_abbrevs
== NULL
)
9112 dwarf2_read_abbrevs (cu
);
9113 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
9117 gdb_assert (cu
->die_hash
== NULL
);
9119 = htab_create_alloc_ex (cu
->header
.length
/ 12,
9123 &cu
->comp_unit_obstack
,
9124 hashtab_obstack_allocate
,
9125 dummy_obstack_deallocate
);
9127 init_cu_die_reader (&reader_specs
, cu
);
9129 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
9132 do_cleanups (back_to
);
9137 /* Main entry point for reading a DIE and all children.
9138 Read the DIE and dump it if requested. */
9140 static struct die_info
*
9141 read_die_and_children (const struct die_reader_specs
*reader
,
9143 gdb_byte
**new_info_ptr
,
9144 struct die_info
*parent
)
9146 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
9147 new_info_ptr
, parent
);
9149 if (dwarf2_die_debug
)
9151 fprintf_unfiltered (gdb_stdlog
,
9152 "\nRead die from %s of %s:\n",
9153 (reader
->cu
->per_cu
->debug_types_section
9156 reader
->abfd
->filename
);
9157 dump_die (result
, dwarf2_die_debug
);
9163 /* Read a single die and all its descendents. Set the die's sibling
9164 field to NULL; set other fields in the die correctly, and set all
9165 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
9166 location of the info_ptr after reading all of those dies. PARENT
9167 is the parent of the die in question. */
9169 static struct die_info
*
9170 read_die_and_children_1 (const struct die_reader_specs
*reader
,
9172 gdb_byte
**new_info_ptr
,
9173 struct die_info
*parent
)
9175 struct die_info
*die
;
9179 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
9182 *new_info_ptr
= cur_ptr
;
9185 store_in_ref_table (die
, reader
->cu
);
9188 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
9192 *new_info_ptr
= cur_ptr
;
9195 die
->sibling
= NULL
;
9196 die
->parent
= parent
;
9200 /* Read a die, all of its descendents, and all of its siblings; set
9201 all of the fields of all of the dies correctly. Arguments are as
9202 in read_die_and_children. */
9204 static struct die_info
*
9205 read_die_and_siblings (const struct die_reader_specs
*reader
,
9207 gdb_byte
**new_info_ptr
,
9208 struct die_info
*parent
)
9210 struct die_info
*first_die
, *last_sibling
;
9214 first_die
= last_sibling
= NULL
;
9218 struct die_info
*die
9219 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
9223 *new_info_ptr
= cur_ptr
;
9230 last_sibling
->sibling
= die
;
9236 /* Read the die from the .debug_info section buffer. Set DIEP to
9237 point to a newly allocated die with its information, except for its
9238 child, sibling, and parent fields. Set HAS_CHILDREN to tell
9239 whether the die has children or not. */
9242 read_full_die (const struct die_reader_specs
*reader
,
9243 struct die_info
**diep
, gdb_byte
*info_ptr
,
9246 unsigned int abbrev_number
, bytes_read
, i
, offset
;
9247 struct abbrev_info
*abbrev
;
9248 struct die_info
*die
;
9249 struct dwarf2_cu
*cu
= reader
->cu
;
9250 bfd
*abfd
= reader
->abfd
;
9252 offset
= info_ptr
- reader
->buffer
;
9253 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9254 info_ptr
+= bytes_read
;
9262 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
9264 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
9266 bfd_get_filename (abfd
));
9268 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
9269 die
->offset
= offset
;
9270 die
->tag
= abbrev
->tag
;
9271 die
->abbrev
= abbrev_number
;
9273 die
->num_attrs
= abbrev
->num_attrs
;
9275 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
9276 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
9277 abfd
, info_ptr
, cu
);
9280 *has_children
= abbrev
->has_children
;
9284 /* In DWARF version 2, the description of the debugging information is
9285 stored in a separate .debug_abbrev section. Before we read any
9286 dies from a section we read in all abbreviations and install them
9287 in a hash table. This function also sets flags in CU describing
9288 the data found in the abbrev table. */
9291 dwarf2_read_abbrevs (struct dwarf2_cu
*cu
)
9293 bfd
*abfd
= cu
->objfile
->obfd
;
9294 struct comp_unit_head
*cu_header
= &cu
->header
;
9295 gdb_byte
*abbrev_ptr
;
9296 struct abbrev_info
*cur_abbrev
;
9297 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
9298 unsigned int abbrev_form
, hash_number
;
9299 struct attr_abbrev
*cur_attrs
;
9300 unsigned int allocated_attrs
;
9302 /* Initialize dwarf2 abbrevs. */
9303 obstack_init (&cu
->abbrev_obstack
);
9304 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
9306 * sizeof (struct abbrev_info
*)));
9307 memset (cu
->dwarf2_abbrevs
, 0,
9308 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
9310 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
9311 &dwarf2_per_objfile
->abbrev
);
9312 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
9313 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9314 abbrev_ptr
+= bytes_read
;
9316 allocated_attrs
= ATTR_ALLOC_CHUNK
;
9317 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
9319 /* Loop until we reach an abbrev number of 0. */
9320 while (abbrev_number
)
9322 cur_abbrev
= dwarf_alloc_abbrev (cu
);
9324 /* read in abbrev header */
9325 cur_abbrev
->number
= abbrev_number
;
9326 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9327 abbrev_ptr
+= bytes_read
;
9328 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
9331 /* now read in declarations */
9332 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9333 abbrev_ptr
+= bytes_read
;
9334 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9335 abbrev_ptr
+= bytes_read
;
9338 if (cur_abbrev
->num_attrs
== allocated_attrs
)
9340 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
9342 = xrealloc (cur_attrs
, (allocated_attrs
9343 * sizeof (struct attr_abbrev
)));
9346 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
9347 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
9348 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9349 abbrev_ptr
+= bytes_read
;
9350 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9351 abbrev_ptr
+= bytes_read
;
9354 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
9355 (cur_abbrev
->num_attrs
9356 * sizeof (struct attr_abbrev
)));
9357 memcpy (cur_abbrev
->attrs
, cur_attrs
,
9358 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
9360 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
9361 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
9362 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
9364 /* Get next abbreviation.
9365 Under Irix6 the abbreviations for a compilation unit are not
9366 always properly terminated with an abbrev number of 0.
9367 Exit loop if we encounter an abbreviation which we have
9368 already read (which means we are about to read the abbreviations
9369 for the next compile unit) or if the end of the abbreviation
9370 table is reached. */
9371 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
9372 >= dwarf2_per_objfile
->abbrev
.size
)
9374 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
9375 abbrev_ptr
+= bytes_read
;
9376 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
9383 /* Release the memory used by the abbrev table for a compilation unit. */
9386 dwarf2_free_abbrev_table (void *ptr_to_cu
)
9388 struct dwarf2_cu
*cu
= ptr_to_cu
;
9390 obstack_free (&cu
->abbrev_obstack
, NULL
);
9391 cu
->dwarf2_abbrevs
= NULL
;
9394 /* Lookup an abbrev_info structure in the abbrev hash table. */
9396 static struct abbrev_info
*
9397 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
9399 unsigned int hash_number
;
9400 struct abbrev_info
*abbrev
;
9402 hash_number
= number
% ABBREV_HASH_SIZE
;
9403 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
9407 if (abbrev
->number
== number
)
9410 abbrev
= abbrev
->next
;
9415 /* Returns nonzero if TAG represents a type that we might generate a partial
9419 is_type_tag_for_partial (int tag
)
9424 /* Some types that would be reasonable to generate partial symbols for,
9425 that we don't at present. */
9426 case DW_TAG_array_type
:
9427 case DW_TAG_file_type
:
9428 case DW_TAG_ptr_to_member_type
:
9429 case DW_TAG_set_type
:
9430 case DW_TAG_string_type
:
9431 case DW_TAG_subroutine_type
:
9433 case DW_TAG_base_type
:
9434 case DW_TAG_class_type
:
9435 case DW_TAG_interface_type
:
9436 case DW_TAG_enumeration_type
:
9437 case DW_TAG_structure_type
:
9438 case DW_TAG_subrange_type
:
9439 case DW_TAG_typedef
:
9440 case DW_TAG_union_type
:
9447 /* Load all DIEs that are interesting for partial symbols into memory. */
9449 static struct partial_die_info
*
9450 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
9451 int building_psymtab
, struct dwarf2_cu
*cu
)
9453 struct objfile
*objfile
= cu
->objfile
;
9454 struct partial_die_info
*part_die
;
9455 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
9456 struct abbrev_info
*abbrev
;
9457 unsigned int bytes_read
;
9458 unsigned int load_all
= 0;
9460 int nesting_level
= 1;
9465 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
9469 = htab_create_alloc_ex (cu
->header
.length
/ 12,
9473 &cu
->comp_unit_obstack
,
9474 hashtab_obstack_allocate
,
9475 dummy_obstack_deallocate
);
9477 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
9478 sizeof (struct partial_die_info
));
9482 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
9484 /* A NULL abbrev means the end of a series of children. */
9487 if (--nesting_level
== 0)
9489 /* PART_DIE was probably the last thing allocated on the
9490 comp_unit_obstack, so we could call obstack_free
9491 here. We don't do that because the waste is small,
9492 and will be cleaned up when we're done with this
9493 compilation unit. This way, we're also more robust
9494 against other users of the comp_unit_obstack. */
9497 info_ptr
+= bytes_read
;
9498 last_die
= parent_die
;
9499 parent_die
= parent_die
->die_parent
;
9503 /* Check for template arguments. We never save these; if
9504 they're seen, we just mark the parent, and go on our way. */
9505 if (parent_die
!= NULL
9506 && cu
->language
== language_cplus
9507 && (abbrev
->tag
== DW_TAG_template_type_param
9508 || abbrev
->tag
== DW_TAG_template_value_param
))
9510 parent_die
->has_template_arguments
= 1;
9514 /* We don't need a partial DIE for the template argument. */
9515 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
9521 /* We only recurse into subprograms looking for template arguments.
9522 Skip their other children. */
9524 && cu
->language
== language_cplus
9525 && parent_die
!= NULL
9526 && parent_die
->tag
== DW_TAG_subprogram
)
9528 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
9532 /* Check whether this DIE is interesting enough to save. Normally
9533 we would not be interested in members here, but there may be
9534 later variables referencing them via DW_AT_specification (for
9537 && !is_type_tag_for_partial (abbrev
->tag
)
9538 && abbrev
->tag
!= DW_TAG_constant
9539 && abbrev
->tag
!= DW_TAG_enumerator
9540 && abbrev
->tag
!= DW_TAG_subprogram
9541 && abbrev
->tag
!= DW_TAG_lexical_block
9542 && abbrev
->tag
!= DW_TAG_variable
9543 && abbrev
->tag
!= DW_TAG_namespace
9544 && abbrev
->tag
!= DW_TAG_module
9545 && abbrev
->tag
!= DW_TAG_member
)
9547 /* Otherwise we skip to the next sibling, if any. */
9548 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
9552 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
9553 buffer
, info_ptr
, cu
);
9555 /* This two-pass algorithm for processing partial symbols has a
9556 high cost in cache pressure. Thus, handle some simple cases
9557 here which cover the majority of C partial symbols. DIEs
9558 which neither have specification tags in them, nor could have
9559 specification tags elsewhere pointing at them, can simply be
9560 processed and discarded.
9562 This segment is also optional; scan_partial_symbols and
9563 add_partial_symbol will handle these DIEs if we chain
9564 them in normally. When compilers which do not emit large
9565 quantities of duplicate debug information are more common,
9566 this code can probably be removed. */
9568 /* Any complete simple types at the top level (pretty much all
9569 of them, for a language without namespaces), can be processed
9571 if (parent_die
== NULL
9572 && part_die
->has_specification
== 0
9573 && part_die
->is_declaration
== 0
9574 && ((part_die
->tag
== DW_TAG_typedef
&& !part_die
->has_children
)
9575 || part_die
->tag
== DW_TAG_base_type
9576 || part_die
->tag
== DW_TAG_subrange_type
))
9578 if (building_psymtab
&& part_die
->name
!= NULL
)
9579 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
9580 VAR_DOMAIN
, LOC_TYPEDEF
,
9581 &objfile
->static_psymbols
,
9582 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
9583 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
9587 /* The exception for DW_TAG_typedef with has_children above is
9588 a workaround of GCC PR debug/47510. In the case of this complaint
9589 type_name_no_tag_or_error will error on such types later.
9591 GDB skipped children of DW_TAG_typedef by the shortcut above and then
9592 it could not find the child DIEs referenced later, this is checked
9593 above. In correct DWARF DW_TAG_typedef should have no children. */
9595 if (part_die
->tag
== DW_TAG_typedef
&& part_die
->has_children
)
9596 complaint (&symfile_complaints
,
9597 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
9598 "- DIE at 0x%x [in module %s]"),
9599 part_die
->offset
, objfile
->name
);
9601 /* If we're at the second level, and we're an enumerator, and
9602 our parent has no specification (meaning possibly lives in a
9603 namespace elsewhere), then we can add the partial symbol now
9604 instead of queueing it. */
9605 if (part_die
->tag
== DW_TAG_enumerator
9606 && parent_die
!= NULL
9607 && parent_die
->die_parent
== NULL
9608 && parent_die
->tag
== DW_TAG_enumeration_type
9609 && parent_die
->has_specification
== 0)
9611 if (part_die
->name
== NULL
)
9612 complaint (&symfile_complaints
,
9613 _("malformed enumerator DIE ignored"));
9614 else if (building_psymtab
)
9615 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
9616 VAR_DOMAIN
, LOC_CONST
,
9617 (cu
->language
== language_cplus
9618 || cu
->language
== language_java
)
9619 ? &objfile
->global_psymbols
9620 : &objfile
->static_psymbols
,
9621 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
9623 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
9627 /* We'll save this DIE so link it in. */
9628 part_die
->die_parent
= parent_die
;
9629 part_die
->die_sibling
= NULL
;
9630 part_die
->die_child
= NULL
;
9632 if (last_die
&& last_die
== parent_die
)
9633 last_die
->die_child
= part_die
;
9635 last_die
->die_sibling
= part_die
;
9637 last_die
= part_die
;
9639 if (first_die
== NULL
)
9640 first_die
= part_die
;
9642 /* Maybe add the DIE to the hash table. Not all DIEs that we
9643 find interesting need to be in the hash table, because we
9644 also have the parent/sibling/child chains; only those that we
9645 might refer to by offset later during partial symbol reading.
9647 For now this means things that might have be the target of a
9648 DW_AT_specification, DW_AT_abstract_origin, or
9649 DW_AT_extension. DW_AT_extension will refer only to
9650 namespaces; DW_AT_abstract_origin refers to functions (and
9651 many things under the function DIE, but we do not recurse
9652 into function DIEs during partial symbol reading) and
9653 possibly variables as well; DW_AT_specification refers to
9654 declarations. Declarations ought to have the DW_AT_declaration
9655 flag. It happens that GCC forgets to put it in sometimes, but
9656 only for functions, not for types.
9658 Adding more things than necessary to the hash table is harmless
9659 except for the performance cost. Adding too few will result in
9660 wasted time in find_partial_die, when we reread the compilation
9661 unit with load_all_dies set. */
9664 || abbrev
->tag
== DW_TAG_constant
9665 || abbrev
->tag
== DW_TAG_subprogram
9666 || abbrev
->tag
== DW_TAG_variable
9667 || abbrev
->tag
== DW_TAG_namespace
9668 || part_die
->is_declaration
)
9672 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
9673 part_die
->offset
, INSERT
);
9677 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
9678 sizeof (struct partial_die_info
));
9680 /* For some DIEs we want to follow their children (if any). For C
9681 we have no reason to follow the children of structures; for other
9682 languages we have to, so that we can get at method physnames
9683 to infer fully qualified class names, for DW_AT_specification,
9684 and for C++ template arguments. For C++, we also look one level
9685 inside functions to find template arguments (if the name of the
9686 function does not already contain the template arguments).
9688 For Ada, we need to scan the children of subprograms and lexical
9689 blocks as well because Ada allows the definition of nested
9690 entities that could be interesting for the debugger, such as
9691 nested subprograms for instance. */
9692 if (last_die
->has_children
9694 || last_die
->tag
== DW_TAG_namespace
9695 || last_die
->tag
== DW_TAG_module
9696 || last_die
->tag
== DW_TAG_enumeration_type
9697 || (cu
->language
== language_cplus
9698 && last_die
->tag
== DW_TAG_subprogram
9699 && (last_die
->name
== NULL
9700 || strchr (last_die
->name
, '<') == NULL
))
9701 || (cu
->language
!= language_c
9702 && (last_die
->tag
== DW_TAG_class_type
9703 || last_die
->tag
== DW_TAG_interface_type
9704 || last_die
->tag
== DW_TAG_structure_type
9705 || last_die
->tag
== DW_TAG_union_type
))
9706 || (cu
->language
== language_ada
9707 && (last_die
->tag
== DW_TAG_subprogram
9708 || last_die
->tag
== DW_TAG_lexical_block
))))
9711 parent_die
= last_die
;
9715 /* Otherwise we skip to the next sibling, if any. */
9716 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
9718 /* Back to the top, do it again. */
9722 /* Read a minimal amount of information into the minimal die structure. */
9725 read_partial_die (struct partial_die_info
*part_die
,
9726 struct abbrev_info
*abbrev
,
9727 unsigned int abbrev_len
, bfd
*abfd
,
9728 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
9729 struct dwarf2_cu
*cu
)
9731 struct objfile
*objfile
= cu
->objfile
;
9733 struct attribute attr
;
9734 int has_low_pc_attr
= 0;
9735 int has_high_pc_attr
= 0;
9737 memset (part_die
, 0, sizeof (struct partial_die_info
));
9739 part_die
->offset
= info_ptr
- buffer
;
9741 info_ptr
+= abbrev_len
;
9746 part_die
->tag
= abbrev
->tag
;
9747 part_die
->has_children
= abbrev
->has_children
;
9749 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
9751 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
9753 /* Store the data if it is of an attribute we want to keep in a
9754 partial symbol table. */
9758 switch (part_die
->tag
)
9760 case DW_TAG_compile_unit
:
9761 case DW_TAG_type_unit
:
9762 /* Compilation units have a DW_AT_name that is a filename, not
9763 a source language identifier. */
9764 case DW_TAG_enumeration_type
:
9765 case DW_TAG_enumerator
:
9766 /* These tags always have simple identifiers already; no need
9767 to canonicalize them. */
9768 part_die
->name
= DW_STRING (&attr
);
9772 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
9773 &objfile
->objfile_obstack
);
9777 case DW_AT_linkage_name
:
9778 case DW_AT_MIPS_linkage_name
:
9779 /* Note that both forms of linkage name might appear. We
9780 assume they will be the same, and we only store the last
9782 if (cu
->language
== language_ada
)
9783 part_die
->name
= DW_STRING (&attr
);
9784 part_die
->linkage_name
= DW_STRING (&attr
);
9787 has_low_pc_attr
= 1;
9788 part_die
->lowpc
= DW_ADDR (&attr
);
9791 has_high_pc_attr
= 1;
9792 part_die
->highpc
= DW_ADDR (&attr
);
9794 case DW_AT_location
:
9795 /* Support the .debug_loc offsets. */
9796 if (attr_form_is_block (&attr
))
9798 part_die
->locdesc
= DW_BLOCK (&attr
);
9800 else if (attr_form_is_section_offset (&attr
))
9802 dwarf2_complex_location_expr_complaint ();
9806 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
9807 "partial symbol information");
9810 case DW_AT_external
:
9811 part_die
->is_external
= DW_UNSND (&attr
);
9813 case DW_AT_declaration
:
9814 part_die
->is_declaration
= DW_UNSND (&attr
);
9817 part_die
->has_type
= 1;
9819 case DW_AT_abstract_origin
:
9820 case DW_AT_specification
:
9821 case DW_AT_extension
:
9822 part_die
->has_specification
= 1;
9823 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
9826 /* Ignore absolute siblings, they might point outside of
9827 the current compile unit. */
9828 if (attr
.form
== DW_FORM_ref_addr
)
9829 complaint (&symfile_complaints
,
9830 _("ignoring absolute DW_AT_sibling"));
9832 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
9834 case DW_AT_byte_size
:
9835 part_die
->has_byte_size
= 1;
9837 case DW_AT_calling_convention
:
9838 /* DWARF doesn't provide a way to identify a program's source-level
9839 entry point. DW_AT_calling_convention attributes are only meant
9840 to describe functions' calling conventions.
9842 However, because it's a necessary piece of information in
9843 Fortran, and because DW_CC_program is the only piece of debugging
9844 information whose definition refers to a 'main program' at all,
9845 several compilers have begun marking Fortran main programs with
9846 DW_CC_program --- even when those functions use the standard
9847 calling conventions.
9849 So until DWARF specifies a way to provide this information and
9850 compilers pick up the new representation, we'll support this
9852 if (DW_UNSND (&attr
) == DW_CC_program
9853 && cu
->language
== language_fortran
)
9855 set_main_name (part_die
->name
);
9857 /* As this DIE has a static linkage the name would be difficult
9858 to look up later. */
9859 language_of_main
= language_fortran
;
9867 if (has_low_pc_attr
&& has_high_pc_attr
)
9869 /* When using the GNU linker, .gnu.linkonce. sections are used to
9870 eliminate duplicate copies of functions and vtables and such.
9871 The linker will arbitrarily choose one and discard the others.
9872 The AT_*_pc values for such functions refer to local labels in
9873 these sections. If the section from that file was discarded, the
9874 labels are not in the output, so the relocs get a value of 0.
9875 If this is a discarded function, mark the pc bounds as invalid,
9876 so that GDB will ignore it. */
9877 if (part_die
->lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
9879 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9881 complaint (&symfile_complaints
,
9882 _("DW_AT_low_pc %s is zero "
9883 "for DIE at 0x%x [in module %s]"),
9884 paddress (gdbarch
, part_die
->lowpc
),
9885 part_die
->offset
, objfile
->name
);
9887 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
9888 else if (part_die
->lowpc
>= part_die
->highpc
)
9890 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9892 complaint (&symfile_complaints
,
9893 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
9894 "for DIE at 0x%x [in module %s]"),
9895 paddress (gdbarch
, part_die
->lowpc
),
9896 paddress (gdbarch
, part_die
->highpc
),
9897 part_die
->offset
, objfile
->name
);
9900 part_die
->has_pc_info
= 1;
9906 /* Find a cached partial DIE at OFFSET in CU. */
9908 static struct partial_die_info
*
9909 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
9911 struct partial_die_info
*lookup_die
= NULL
;
9912 struct partial_die_info part_die
;
9914 part_die
.offset
= offset
;
9915 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
9920 /* Find a partial DIE at OFFSET, which may or may not be in CU,
9921 except in the case of .debug_types DIEs which do not reference
9922 outside their CU (they do however referencing other types via
9923 DW_FORM_ref_sig8). */
9925 static struct partial_die_info
*
9926 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
9928 struct objfile
*objfile
= cu
->objfile
;
9929 struct dwarf2_per_cu_data
*per_cu
= NULL
;
9930 struct partial_die_info
*pd
= NULL
;
9932 if (cu
->per_cu
->debug_types_section
)
9934 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9940 if (offset_in_cu_p (&cu
->header
, offset
))
9942 pd
= find_partial_die_in_comp_unit (offset
, cu
);
9947 per_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
9949 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
9950 load_partial_comp_unit (per_cu
);
9952 per_cu
->cu
->last_used
= 0;
9953 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9955 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
9957 struct cleanup
*back_to
;
9958 struct partial_die_info comp_unit_die
;
9959 struct abbrev_info
*abbrev
;
9960 unsigned int bytes_read
;
9963 per_cu
->load_all_dies
= 1;
9965 /* Re-read the DIEs. */
9966 back_to
= make_cleanup (null_cleanup
, 0);
9967 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
9969 dwarf2_read_abbrevs (per_cu
->cu
);
9970 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
9972 info_ptr
= (dwarf2_per_objfile
->info
.buffer
9973 + per_cu
->cu
->header
.offset
9974 + per_cu
->cu
->header
.first_die_offset
);
9975 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
9976 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
9978 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9980 if (comp_unit_die
.has_children
)
9981 load_partial_dies (objfile
->obfd
,
9982 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
9984 do_cleanups (back_to
);
9986 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
9992 internal_error (__FILE__
, __LINE__
,
9993 _("could not find partial DIE 0x%x "
9994 "in cache [from module %s]\n"),
9995 offset
, bfd_get_filename (objfile
->obfd
));
9999 /* See if we can figure out if the class lives in a namespace. We do
10000 this by looking for a member function; its demangled name will
10001 contain namespace info, if there is any. */
10004 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
10005 struct dwarf2_cu
*cu
)
10007 /* NOTE: carlton/2003-10-07: Getting the info this way changes
10008 what template types look like, because the demangler
10009 frequently doesn't give the same name as the debug info. We
10010 could fix this by only using the demangled name to get the
10011 prefix (but see comment in read_structure_type). */
10013 struct partial_die_info
*real_pdi
;
10014 struct partial_die_info
*child_pdi
;
10016 /* If this DIE (this DIE's specification, if any) has a parent, then
10017 we should not do this. We'll prepend the parent's fully qualified
10018 name when we create the partial symbol. */
10020 real_pdi
= struct_pdi
;
10021 while (real_pdi
->has_specification
)
10022 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
10024 if (real_pdi
->die_parent
!= NULL
)
10027 for (child_pdi
= struct_pdi
->die_child
;
10029 child_pdi
= child_pdi
->die_sibling
)
10031 if (child_pdi
->tag
== DW_TAG_subprogram
10032 && child_pdi
->linkage_name
!= NULL
)
10034 char *actual_class_name
10035 = language_class_name_from_physname (cu
->language_defn
,
10036 child_pdi
->linkage_name
);
10037 if (actual_class_name
!= NULL
)
10040 = obsavestring (actual_class_name
,
10041 strlen (actual_class_name
),
10042 &cu
->objfile
->objfile_obstack
);
10043 xfree (actual_class_name
);
10050 /* Adjust PART_DIE before generating a symbol for it. This function
10051 may set the is_external flag or change the DIE's name. */
10054 fixup_partial_die (struct partial_die_info
*part_die
,
10055 struct dwarf2_cu
*cu
)
10057 /* Once we've fixed up a die, there's no point in doing so again.
10058 This also avoids a memory leak if we were to call
10059 guess_partial_die_structure_name multiple times. */
10060 if (part_die
->fixup_called
)
10063 /* If we found a reference attribute and the DIE has no name, try
10064 to find a name in the referred to DIE. */
10066 if (part_die
->name
== NULL
&& part_die
->has_specification
)
10068 struct partial_die_info
*spec_die
;
10070 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
10072 fixup_partial_die (spec_die
, cu
);
10074 if (spec_die
->name
)
10076 part_die
->name
= spec_die
->name
;
10078 /* Copy DW_AT_external attribute if it is set. */
10079 if (spec_die
->is_external
)
10080 part_die
->is_external
= spec_die
->is_external
;
10084 /* Set default names for some unnamed DIEs. */
10086 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
10087 part_die
->name
= CP_ANONYMOUS_NAMESPACE_STR
;
10089 /* If there is no parent die to provide a namespace, and there are
10090 children, see if we can determine the namespace from their linkage
10092 if (cu
->language
== language_cplus
10093 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
10094 && part_die
->die_parent
== NULL
10095 && part_die
->has_children
10096 && (part_die
->tag
== DW_TAG_class_type
10097 || part_die
->tag
== DW_TAG_structure_type
10098 || part_die
->tag
== DW_TAG_union_type
))
10099 guess_partial_die_structure_name (part_die
, cu
);
10101 /* GCC might emit a nameless struct or union that has a linkage
10102 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
10103 if (part_die
->name
== NULL
10104 && (part_die
->tag
== DW_TAG_class_type
10105 || part_die
->tag
== DW_TAG_interface_type
10106 || part_die
->tag
== DW_TAG_structure_type
10107 || part_die
->tag
== DW_TAG_union_type
)
10108 && part_die
->linkage_name
!= NULL
)
10112 demangled
= cplus_demangle (part_die
->linkage_name
, DMGL_TYPES
);
10117 /* Strip any leading namespaces/classes, keep only the base name.
10118 DW_AT_name for named DIEs does not contain the prefixes. */
10119 base
= strrchr (demangled
, ':');
10120 if (base
&& base
> demangled
&& base
[-1] == ':')
10125 part_die
->name
= obsavestring (base
, strlen (base
),
10126 &cu
->objfile
->objfile_obstack
);
10131 part_die
->fixup_called
= 1;
10134 /* Read an attribute value described by an attribute form. */
10137 read_attribute_value (struct attribute
*attr
, unsigned form
,
10138 bfd
*abfd
, gdb_byte
*info_ptr
,
10139 struct dwarf2_cu
*cu
)
10141 struct comp_unit_head
*cu_header
= &cu
->header
;
10142 unsigned int bytes_read
;
10143 struct dwarf_block
*blk
;
10148 case DW_FORM_ref_addr
:
10149 if (cu
->header
.version
== 2)
10150 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
10152 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
,
10153 &cu
->header
, &bytes_read
);
10154 info_ptr
+= bytes_read
;
10157 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
10158 info_ptr
+= bytes_read
;
10160 case DW_FORM_block2
:
10161 blk
= dwarf_alloc_block (cu
);
10162 blk
->size
= read_2_bytes (abfd
, info_ptr
);
10164 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10165 info_ptr
+= blk
->size
;
10166 DW_BLOCK (attr
) = blk
;
10168 case DW_FORM_block4
:
10169 blk
= dwarf_alloc_block (cu
);
10170 blk
->size
= read_4_bytes (abfd
, info_ptr
);
10172 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10173 info_ptr
+= blk
->size
;
10174 DW_BLOCK (attr
) = blk
;
10176 case DW_FORM_data2
:
10177 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
10180 case DW_FORM_data4
:
10181 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
10184 case DW_FORM_data8
:
10185 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
10188 case DW_FORM_sec_offset
:
10189 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
10190 info_ptr
+= bytes_read
;
10192 case DW_FORM_string
:
10193 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
10194 DW_STRING_IS_CANONICAL (attr
) = 0;
10195 info_ptr
+= bytes_read
;
10198 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
10200 DW_STRING_IS_CANONICAL (attr
) = 0;
10201 info_ptr
+= bytes_read
;
10203 case DW_FORM_exprloc
:
10204 case DW_FORM_block
:
10205 blk
= dwarf_alloc_block (cu
);
10206 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10207 info_ptr
+= bytes_read
;
10208 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10209 info_ptr
+= blk
->size
;
10210 DW_BLOCK (attr
) = blk
;
10212 case DW_FORM_block1
:
10213 blk
= dwarf_alloc_block (cu
);
10214 blk
->size
= read_1_byte (abfd
, info_ptr
);
10216 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
10217 info_ptr
+= blk
->size
;
10218 DW_BLOCK (attr
) = blk
;
10220 case DW_FORM_data1
:
10221 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
10225 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
10228 case DW_FORM_flag_present
:
10229 DW_UNSND (attr
) = 1;
10231 case DW_FORM_sdata
:
10232 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
10233 info_ptr
+= bytes_read
;
10235 case DW_FORM_udata
:
10236 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10237 info_ptr
+= bytes_read
;
10240 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
10244 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
10248 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
10252 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
10255 case DW_FORM_ref_sig8
:
10256 /* Convert the signature to something we can record in DW_UNSND
10258 NOTE: This is NULL if the type wasn't found. */
10259 DW_SIGNATURED_TYPE (attr
) =
10260 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
10263 case DW_FORM_ref_udata
:
10264 DW_ADDR (attr
) = (cu
->header
.offset
10265 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
10266 info_ptr
+= bytes_read
;
10268 case DW_FORM_indirect
:
10269 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
10270 info_ptr
+= bytes_read
;
10271 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
10274 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
10275 dwarf_form_name (form
),
10276 bfd_get_filename (abfd
));
10279 /* We have seen instances where the compiler tried to emit a byte
10280 size attribute of -1 which ended up being encoded as an unsigned
10281 0xffffffff. Although 0xffffffff is technically a valid size value,
10282 an object of this size seems pretty unlikely so we can relatively
10283 safely treat these cases as if the size attribute was invalid and
10284 treat them as zero by default. */
10285 if (attr
->name
== DW_AT_byte_size
10286 && form
== DW_FORM_data4
10287 && DW_UNSND (attr
) >= 0xffffffff)
10290 (&symfile_complaints
,
10291 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
10292 hex_string (DW_UNSND (attr
)));
10293 DW_UNSND (attr
) = 0;
10299 /* Read an attribute described by an abbreviated attribute. */
10302 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
10303 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
10305 attr
->name
= abbrev
->name
;
10306 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
10309 /* Read dwarf information from a buffer. */
10311 static unsigned int
10312 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
10314 return bfd_get_8 (abfd
, buf
);
10318 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
10320 return bfd_get_signed_8 (abfd
, buf
);
10323 static unsigned int
10324 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
10326 return bfd_get_16 (abfd
, buf
);
10330 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
10332 return bfd_get_signed_16 (abfd
, buf
);
10335 static unsigned int
10336 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
10338 return bfd_get_32 (abfd
, buf
);
10342 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
10344 return bfd_get_signed_32 (abfd
, buf
);
10348 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
10350 return bfd_get_64 (abfd
, buf
);
10354 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
10355 unsigned int *bytes_read
)
10357 struct comp_unit_head
*cu_header
= &cu
->header
;
10358 CORE_ADDR retval
= 0;
10360 if (cu_header
->signed_addr_p
)
10362 switch (cu_header
->addr_size
)
10365 retval
= bfd_get_signed_16 (abfd
, buf
);
10368 retval
= bfd_get_signed_32 (abfd
, buf
);
10371 retval
= bfd_get_signed_64 (abfd
, buf
);
10374 internal_error (__FILE__
, __LINE__
,
10375 _("read_address: bad switch, signed [in module %s]"),
10376 bfd_get_filename (abfd
));
10381 switch (cu_header
->addr_size
)
10384 retval
= bfd_get_16 (abfd
, buf
);
10387 retval
= bfd_get_32 (abfd
, buf
);
10390 retval
= bfd_get_64 (abfd
, buf
);
10393 internal_error (__FILE__
, __LINE__
,
10394 _("read_address: bad switch, "
10395 "unsigned [in module %s]"),
10396 bfd_get_filename (abfd
));
10400 *bytes_read
= cu_header
->addr_size
;
10404 /* Read the initial length from a section. The (draft) DWARF 3
10405 specification allows the initial length to take up either 4 bytes
10406 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
10407 bytes describe the length and all offsets will be 8 bytes in length
10410 An older, non-standard 64-bit format is also handled by this
10411 function. The older format in question stores the initial length
10412 as an 8-byte quantity without an escape value. Lengths greater
10413 than 2^32 aren't very common which means that the initial 4 bytes
10414 is almost always zero. Since a length value of zero doesn't make
10415 sense for the 32-bit format, this initial zero can be considered to
10416 be an escape value which indicates the presence of the older 64-bit
10417 format. As written, the code can't detect (old format) lengths
10418 greater than 4GB. If it becomes necessary to handle lengths
10419 somewhat larger than 4GB, we could allow other small values (such
10420 as the non-sensical values of 1, 2, and 3) to also be used as
10421 escape values indicating the presence of the old format.
10423 The value returned via bytes_read should be used to increment the
10424 relevant pointer after calling read_initial_length().
10426 [ Note: read_initial_length() and read_offset() are based on the
10427 document entitled "DWARF Debugging Information Format", revision
10428 3, draft 8, dated November 19, 2001. This document was obtained
10431 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
10433 This document is only a draft and is subject to change. (So beware.)
10435 Details regarding the older, non-standard 64-bit format were
10436 determined empirically by examining 64-bit ELF files produced by
10437 the SGI toolchain on an IRIX 6.5 machine.
10439 - Kevin, July 16, 2002
10443 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
10445 LONGEST length
= bfd_get_32 (abfd
, buf
);
10447 if (length
== 0xffffffff)
10449 length
= bfd_get_64 (abfd
, buf
+ 4);
10452 else if (length
== 0)
10454 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
10455 length
= bfd_get_64 (abfd
, buf
);
10466 /* Cover function for read_initial_length.
10467 Returns the length of the object at BUF, and stores the size of the
10468 initial length in *BYTES_READ and stores the size that offsets will be in
10470 If the initial length size is not equivalent to that specified in
10471 CU_HEADER then issue a complaint.
10472 This is useful when reading non-comp-unit headers. */
10475 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
10476 const struct comp_unit_head
*cu_header
,
10477 unsigned int *bytes_read
,
10478 unsigned int *offset_size
)
10480 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
10482 gdb_assert (cu_header
->initial_length_size
== 4
10483 || cu_header
->initial_length_size
== 8
10484 || cu_header
->initial_length_size
== 12);
10486 if (cu_header
->initial_length_size
!= *bytes_read
)
10487 complaint (&symfile_complaints
,
10488 _("intermixed 32-bit and 64-bit DWARF sections"));
10490 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
10494 /* Read an offset from the data stream. The size of the offset is
10495 given by cu_header->offset_size. */
10498 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
10499 unsigned int *bytes_read
)
10501 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
10503 *bytes_read
= cu_header
->offset_size
;
10507 /* Read an offset from the data stream. */
10510 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
10512 LONGEST retval
= 0;
10514 switch (offset_size
)
10517 retval
= bfd_get_32 (abfd
, buf
);
10520 retval
= bfd_get_64 (abfd
, buf
);
10523 internal_error (__FILE__
, __LINE__
,
10524 _("read_offset_1: bad switch [in module %s]"),
10525 bfd_get_filename (abfd
));
10532 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
10534 /* If the size of a host char is 8 bits, we can return a pointer
10535 to the buffer, otherwise we have to copy the data to a buffer
10536 allocated on the temporary obstack. */
10537 gdb_assert (HOST_CHAR_BIT
== 8);
10542 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
10544 /* If the size of a host char is 8 bits, we can return a pointer
10545 to the string, otherwise we have to copy the string to a buffer
10546 allocated on the temporary obstack. */
10547 gdb_assert (HOST_CHAR_BIT
== 8);
10550 *bytes_read_ptr
= 1;
10553 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
10554 return (char *) buf
;
10558 read_indirect_string_at_offset (bfd
*abfd
, LONGEST str_offset
)
10560 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
10561 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
10562 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
10563 bfd_get_filename (abfd
));
10564 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
10565 error (_("DW_FORM_strp pointing outside of "
10566 ".debug_str section [in module %s]"),
10567 bfd_get_filename (abfd
));
10568 gdb_assert (HOST_CHAR_BIT
== 8);
10569 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
10571 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
10575 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
10576 const struct comp_unit_head
*cu_header
,
10577 unsigned int *bytes_read_ptr
)
10579 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
10581 return read_indirect_string_at_offset (abfd
, str_offset
);
10584 static unsigned long
10585 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
10587 unsigned long result
;
10588 unsigned int num_read
;
10590 unsigned char byte
;
10598 byte
= bfd_get_8 (abfd
, buf
);
10601 result
|= ((unsigned long)(byte
& 127) << shift
);
10602 if ((byte
& 128) == 0)
10608 *bytes_read_ptr
= num_read
;
10613 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
10616 int i
, shift
, num_read
;
10617 unsigned char byte
;
10625 byte
= bfd_get_8 (abfd
, buf
);
10628 result
|= ((long)(byte
& 127) << shift
);
10630 if ((byte
& 128) == 0)
10635 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
10636 result
|= -(((long)1) << shift
);
10637 *bytes_read_ptr
= num_read
;
10641 /* Return a pointer to just past the end of an LEB128 number in BUF. */
10644 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
10650 byte
= bfd_get_8 (abfd
, buf
);
10652 if ((byte
& 128) == 0)
10658 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
10665 cu
->language
= language_c
;
10667 case DW_LANG_C_plus_plus
:
10668 cu
->language
= language_cplus
;
10671 cu
->language
= language_d
;
10673 case DW_LANG_Fortran77
:
10674 case DW_LANG_Fortran90
:
10675 case DW_LANG_Fortran95
:
10676 cu
->language
= language_fortran
;
10678 case DW_LANG_Mips_Assembler
:
10679 cu
->language
= language_asm
;
10682 cu
->language
= language_java
;
10684 case DW_LANG_Ada83
:
10685 case DW_LANG_Ada95
:
10686 cu
->language
= language_ada
;
10688 case DW_LANG_Modula2
:
10689 cu
->language
= language_m2
;
10691 case DW_LANG_Pascal83
:
10692 cu
->language
= language_pascal
;
10695 cu
->language
= language_objc
;
10697 case DW_LANG_Cobol74
:
10698 case DW_LANG_Cobol85
:
10700 cu
->language
= language_minimal
;
10703 cu
->language_defn
= language_def (cu
->language
);
10706 /* Return the named attribute or NULL if not there. */
10708 static struct attribute
*
10709 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
10714 struct attribute
*spec
= NULL
;
10716 for (i
= 0; i
< die
->num_attrs
; ++i
)
10718 if (die
->attrs
[i
].name
== name
)
10719 return &die
->attrs
[i
];
10720 if (die
->attrs
[i
].name
== DW_AT_specification
10721 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
10722 spec
= &die
->attrs
[i
];
10728 die
= follow_die_ref (die
, spec
, &cu
);
10734 /* Return the named attribute or NULL if not there,
10735 but do not follow DW_AT_specification, etc.
10736 This is for use in contexts where we're reading .debug_types dies.
10737 Following DW_AT_specification, DW_AT_abstract_origin will take us
10738 back up the chain, and we want to go down. */
10740 static struct attribute
*
10741 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
10742 struct dwarf2_cu
*cu
)
10746 for (i
= 0; i
< die
->num_attrs
; ++i
)
10747 if (die
->attrs
[i
].name
== name
)
10748 return &die
->attrs
[i
];
10753 /* Return non-zero iff the attribute NAME is defined for the given DIE,
10754 and holds a non-zero value. This function should only be used for
10755 DW_FORM_flag or DW_FORM_flag_present attributes. */
10758 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
10760 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
10762 return (attr
&& DW_UNSND (attr
));
10766 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
10768 /* A DIE is a declaration if it has a DW_AT_declaration attribute
10769 which value is non-zero. However, we have to be careful with
10770 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
10771 (via dwarf2_flag_true_p) follows this attribute. So we may
10772 end up accidently finding a declaration attribute that belongs
10773 to a different DIE referenced by the specification attribute,
10774 even though the given DIE does not have a declaration attribute. */
10775 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
10776 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
10779 /* Return the die giving the specification for DIE, if there is
10780 one. *SPEC_CU is the CU containing DIE on input, and the CU
10781 containing the return value on output. If there is no
10782 specification, but there is an abstract origin, that is
10785 static struct die_info
*
10786 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
10788 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
10791 if (spec_attr
== NULL
)
10792 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
10794 if (spec_attr
== NULL
)
10797 return follow_die_ref (die
, spec_attr
, spec_cu
);
10800 /* Free the line_header structure *LH, and any arrays and strings it
10802 NOTE: This is also used as a "cleanup" function. */
10805 free_line_header (struct line_header
*lh
)
10807 if (lh
->standard_opcode_lengths
)
10808 xfree (lh
->standard_opcode_lengths
);
10810 /* Remember that all the lh->file_names[i].name pointers are
10811 pointers into debug_line_buffer, and don't need to be freed. */
10812 if (lh
->file_names
)
10813 xfree (lh
->file_names
);
10815 /* Similarly for the include directory names. */
10816 if (lh
->include_dirs
)
10817 xfree (lh
->include_dirs
);
10822 /* Add an entry to LH's include directory table. */
10825 add_include_dir (struct line_header
*lh
, char *include_dir
)
10827 /* Grow the array if necessary. */
10828 if (lh
->include_dirs_size
== 0)
10830 lh
->include_dirs_size
= 1; /* for testing */
10831 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
10832 * sizeof (*lh
->include_dirs
));
10834 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
10836 lh
->include_dirs_size
*= 2;
10837 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
10838 (lh
->include_dirs_size
10839 * sizeof (*lh
->include_dirs
)));
10842 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
10845 /* Add an entry to LH's file name table. */
10848 add_file_name (struct line_header
*lh
,
10850 unsigned int dir_index
,
10851 unsigned int mod_time
,
10852 unsigned int length
)
10854 struct file_entry
*fe
;
10856 /* Grow the array if necessary. */
10857 if (lh
->file_names_size
== 0)
10859 lh
->file_names_size
= 1; /* for testing */
10860 lh
->file_names
= xmalloc (lh
->file_names_size
10861 * sizeof (*lh
->file_names
));
10863 else if (lh
->num_file_names
>= lh
->file_names_size
)
10865 lh
->file_names_size
*= 2;
10866 lh
->file_names
= xrealloc (lh
->file_names
,
10867 (lh
->file_names_size
10868 * sizeof (*lh
->file_names
)));
10871 fe
= &lh
->file_names
[lh
->num_file_names
++];
10873 fe
->dir_index
= dir_index
;
10874 fe
->mod_time
= mod_time
;
10875 fe
->length
= length
;
10876 fe
->included_p
= 0;
10880 /* Read the statement program header starting at OFFSET in
10881 .debug_line, according to the endianness of ABFD. Return a pointer
10882 to a struct line_header, allocated using xmalloc.
10884 NOTE: the strings in the include directory and file name tables of
10885 the returned object point into debug_line_buffer, and must not be
10888 static struct line_header
*
10889 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
10890 struct dwarf2_cu
*cu
)
10892 struct cleanup
*back_to
;
10893 struct line_header
*lh
;
10894 gdb_byte
*line_ptr
;
10895 unsigned int bytes_read
, offset_size
;
10897 char *cur_dir
, *cur_file
;
10899 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
10900 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
10902 complaint (&symfile_complaints
, _("missing .debug_line section"));
10906 /* Make sure that at least there's room for the total_length field.
10907 That could be 12 bytes long, but we're just going to fudge that. */
10908 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
10910 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10914 lh
= xmalloc (sizeof (*lh
));
10915 memset (lh
, 0, sizeof (*lh
));
10916 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
10919 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
10921 /* Read in the header. */
10923 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
10924 &bytes_read
, &offset_size
);
10925 line_ptr
+= bytes_read
;
10926 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
10927 + dwarf2_per_objfile
->line
.size
))
10929 dwarf2_statement_list_fits_in_line_number_section_complaint ();
10932 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
10933 lh
->version
= read_2_bytes (abfd
, line_ptr
);
10935 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
10936 line_ptr
+= offset_size
;
10937 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
10939 if (lh
->version
>= 4)
10941 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
10945 lh
->maximum_ops_per_instruction
= 1;
10947 if (lh
->maximum_ops_per_instruction
== 0)
10949 lh
->maximum_ops_per_instruction
= 1;
10950 complaint (&symfile_complaints
,
10951 _("invalid maximum_ops_per_instruction "
10952 "in `.debug_line' section"));
10955 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
10957 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
10959 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
10961 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
10963 lh
->standard_opcode_lengths
10964 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
10966 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
10967 for (i
= 1; i
< lh
->opcode_base
; ++i
)
10969 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
10973 /* Read directory table. */
10974 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10976 line_ptr
+= bytes_read
;
10977 add_include_dir (lh
, cur_dir
);
10979 line_ptr
+= bytes_read
;
10981 /* Read file name table. */
10982 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
10984 unsigned int dir_index
, mod_time
, length
;
10986 line_ptr
+= bytes_read
;
10987 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10988 line_ptr
+= bytes_read
;
10989 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10990 line_ptr
+= bytes_read
;
10991 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10992 line_ptr
+= bytes_read
;
10994 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10996 line_ptr
+= bytes_read
;
10997 lh
->statement_program_start
= line_ptr
;
10999 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
11000 + dwarf2_per_objfile
->line
.size
))
11001 complaint (&symfile_complaints
,
11002 _("line number info header doesn't "
11003 "fit in `.debug_line' section"));
11005 discard_cleanups (back_to
);
11009 /* Subroutine of dwarf_decode_lines to simplify it.
11010 Return the file name of the psymtab for included file FILE_INDEX
11011 in line header LH of PST.
11012 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
11013 If space for the result is malloc'd, it will be freed by a cleanup.
11014 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
11017 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
11018 const struct partial_symtab
*pst
,
11019 const char *comp_dir
)
11021 const struct file_entry fe
= lh
->file_names
[file_index
];
11022 char *include_name
= fe
.name
;
11023 char *include_name_to_compare
= include_name
;
11024 char *dir_name
= NULL
;
11025 const char *pst_filename
;
11026 char *copied_name
= NULL
;
11030 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
11032 if (!IS_ABSOLUTE_PATH (include_name
)
11033 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
11035 /* Avoid creating a duplicate psymtab for PST.
11036 We do this by comparing INCLUDE_NAME and PST_FILENAME.
11037 Before we do the comparison, however, we need to account
11038 for DIR_NAME and COMP_DIR.
11039 First prepend dir_name (if non-NULL). If we still don't
11040 have an absolute path prepend comp_dir (if non-NULL).
11041 However, the directory we record in the include-file's
11042 psymtab does not contain COMP_DIR (to match the
11043 corresponding symtab(s)).
11048 bash$ gcc -g ./hello.c
11049 include_name = "hello.c"
11051 DW_AT_comp_dir = comp_dir = "/tmp"
11052 DW_AT_name = "./hello.c" */
11054 if (dir_name
!= NULL
)
11056 include_name
= concat (dir_name
, SLASH_STRING
,
11057 include_name
, (char *)NULL
);
11058 include_name_to_compare
= include_name
;
11059 make_cleanup (xfree
, include_name
);
11061 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
11063 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
11064 include_name
, (char *)NULL
);
11068 pst_filename
= pst
->filename
;
11069 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
11071 copied_name
= concat (pst
->dirname
, SLASH_STRING
,
11072 pst_filename
, (char *)NULL
);
11073 pst_filename
= copied_name
;
11076 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
11078 if (include_name_to_compare
!= include_name
)
11079 xfree (include_name_to_compare
);
11080 if (copied_name
!= NULL
)
11081 xfree (copied_name
);
11085 return include_name
;
11088 /* Ignore this record_line request. */
11091 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
11096 /* Subroutine of dwarf_decode_lines to simplify it.
11097 Process the line number information in LH. */
11100 dwarf_decode_lines_1 (struct line_header
*lh
, const char *comp_dir
,
11101 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
11103 gdb_byte
*line_ptr
, *extended_end
;
11104 gdb_byte
*line_end
;
11105 unsigned int bytes_read
, extended_len
;
11106 unsigned char op_code
, extended_op
, adj_opcode
;
11107 CORE_ADDR baseaddr
;
11108 struct objfile
*objfile
= cu
->objfile
;
11109 bfd
*abfd
= objfile
->obfd
;
11110 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11111 const int decode_for_pst_p
= (pst
!= NULL
);
11112 struct subfile
*last_subfile
= NULL
;
11113 void (*p_record_line
) (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
11116 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11118 line_ptr
= lh
->statement_program_start
;
11119 line_end
= lh
->statement_program_end
;
11121 /* Read the statement sequences until there's nothing left. */
11122 while (line_ptr
< line_end
)
11124 /* state machine registers */
11125 CORE_ADDR address
= 0;
11126 unsigned int file
= 1;
11127 unsigned int line
= 1;
11128 unsigned int column
= 0;
11129 int is_stmt
= lh
->default_is_stmt
;
11130 int basic_block
= 0;
11131 int end_sequence
= 0;
11133 unsigned char op_index
= 0;
11135 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
11137 /* Start a subfile for the current file of the state machine. */
11138 /* lh->include_dirs and lh->file_names are 0-based, but the
11139 directory and file name numbers in the statement program
11141 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
11145 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11147 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
11150 /* Decode the table. */
11151 while (!end_sequence
)
11153 op_code
= read_1_byte (abfd
, line_ptr
);
11155 if (line_ptr
> line_end
)
11157 dwarf2_debug_line_missing_end_sequence_complaint ();
11161 if (op_code
>= lh
->opcode_base
)
11163 /* Special operand. */
11164 adj_opcode
= op_code
- lh
->opcode_base
;
11165 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
11166 / lh
->maximum_ops_per_instruction
)
11167 * lh
->minimum_instruction_length
);
11168 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
11169 % lh
->maximum_ops_per_instruction
);
11170 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
11171 if (lh
->num_file_names
< file
|| file
== 0)
11172 dwarf2_debug_line_missing_file_complaint ();
11173 /* For now we ignore lines not starting on an
11174 instruction boundary. */
11175 else if (op_index
== 0)
11177 lh
->file_names
[file
- 1].included_p
= 1;
11178 if (!decode_for_pst_p
&& is_stmt
)
11180 if (last_subfile
!= current_subfile
)
11182 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11184 (*p_record_line
) (last_subfile
, 0, addr
);
11185 last_subfile
= current_subfile
;
11187 /* Append row to matrix using current values. */
11188 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11189 (*p_record_line
) (current_subfile
, line
, addr
);
11194 else switch (op_code
)
11196 case DW_LNS_extended_op
:
11197 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
11199 line_ptr
+= bytes_read
;
11200 extended_end
= line_ptr
+ extended_len
;
11201 extended_op
= read_1_byte (abfd
, line_ptr
);
11203 switch (extended_op
)
11205 case DW_LNE_end_sequence
:
11206 p_record_line
= record_line
;
11209 case DW_LNE_set_address
:
11210 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
11212 if (address
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
11214 /* This line table is for a function which has been
11215 GCd by the linker. Ignore it. PR gdb/12528 */
11218 = line_ptr
- dwarf2_per_objfile
->line
.buffer
;
11220 complaint (&symfile_complaints
,
11221 _(".debug_line address at offset 0x%lx is 0 "
11223 line_offset
, objfile
->name
);
11224 p_record_line
= noop_record_line
;
11228 line_ptr
+= bytes_read
;
11229 address
+= baseaddr
;
11231 case DW_LNE_define_file
:
11234 unsigned int dir_index
, mod_time
, length
;
11236 cur_file
= read_direct_string (abfd
, line_ptr
,
11238 line_ptr
+= bytes_read
;
11240 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11241 line_ptr
+= bytes_read
;
11243 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11244 line_ptr
+= bytes_read
;
11246 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11247 line_ptr
+= bytes_read
;
11248 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
11251 case DW_LNE_set_discriminator
:
11252 /* The discriminator is not interesting to the debugger;
11254 line_ptr
= extended_end
;
11257 complaint (&symfile_complaints
,
11258 _("mangled .debug_line section"));
11261 /* Make sure that we parsed the extended op correctly. If e.g.
11262 we expected a different address size than the producer used,
11263 we may have read the wrong number of bytes. */
11264 if (line_ptr
!= extended_end
)
11266 complaint (&symfile_complaints
,
11267 _("mangled .debug_line section"));
11272 if (lh
->num_file_names
< file
|| file
== 0)
11273 dwarf2_debug_line_missing_file_complaint ();
11276 lh
->file_names
[file
- 1].included_p
= 1;
11277 if (!decode_for_pst_p
&& is_stmt
)
11279 if (last_subfile
!= current_subfile
)
11281 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11283 (*p_record_line
) (last_subfile
, 0, addr
);
11284 last_subfile
= current_subfile
;
11286 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11287 (*p_record_line
) (current_subfile
, line
, addr
);
11292 case DW_LNS_advance_pc
:
11295 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11297 address
+= (((op_index
+ adjust
)
11298 / lh
->maximum_ops_per_instruction
)
11299 * lh
->minimum_instruction_length
);
11300 op_index
= ((op_index
+ adjust
)
11301 % lh
->maximum_ops_per_instruction
);
11302 line_ptr
+= bytes_read
;
11305 case DW_LNS_advance_line
:
11306 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
11307 line_ptr
+= bytes_read
;
11309 case DW_LNS_set_file
:
11311 /* The arrays lh->include_dirs and lh->file_names are
11312 0-based, but the directory and file name numbers in
11313 the statement program are 1-based. */
11314 struct file_entry
*fe
;
11317 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11318 line_ptr
+= bytes_read
;
11319 if (lh
->num_file_names
< file
|| file
== 0)
11320 dwarf2_debug_line_missing_file_complaint ();
11323 fe
= &lh
->file_names
[file
- 1];
11325 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11326 if (!decode_for_pst_p
)
11328 last_subfile
= current_subfile
;
11329 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
11334 case DW_LNS_set_column
:
11335 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11336 line_ptr
+= bytes_read
;
11338 case DW_LNS_negate_stmt
:
11339 is_stmt
= (!is_stmt
);
11341 case DW_LNS_set_basic_block
:
11344 /* Add to the address register of the state machine the
11345 address increment value corresponding to special opcode
11346 255. I.e., this value is scaled by the minimum
11347 instruction length since special opcode 255 would have
11348 scaled the increment. */
11349 case DW_LNS_const_add_pc
:
11351 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
11353 address
+= (((op_index
+ adjust
)
11354 / lh
->maximum_ops_per_instruction
)
11355 * lh
->minimum_instruction_length
);
11356 op_index
= ((op_index
+ adjust
)
11357 % lh
->maximum_ops_per_instruction
);
11360 case DW_LNS_fixed_advance_pc
:
11361 address
+= read_2_bytes (abfd
, line_ptr
);
11367 /* Unknown standard opcode, ignore it. */
11370 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
11372 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
11373 line_ptr
+= bytes_read
;
11378 if (lh
->num_file_names
< file
|| file
== 0)
11379 dwarf2_debug_line_missing_file_complaint ();
11382 lh
->file_names
[file
- 1].included_p
= 1;
11383 if (!decode_for_pst_p
)
11385 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
11386 (*p_record_line
) (current_subfile
, 0, addr
);
11392 /* Decode the Line Number Program (LNP) for the given line_header
11393 structure and CU. The actual information extracted and the type
11394 of structures created from the LNP depends on the value of PST.
11396 1. If PST is NULL, then this procedure uses the data from the program
11397 to create all necessary symbol tables, and their linetables.
11399 2. If PST is not NULL, this procedure reads the program to determine
11400 the list of files included by the unit represented by PST, and
11401 builds all the associated partial symbol tables.
11403 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
11404 It is used for relative paths in the line table.
11405 NOTE: When processing partial symtabs (pst != NULL),
11406 comp_dir == pst->dirname.
11408 NOTE: It is important that psymtabs have the same file name (via strcmp)
11409 as the corresponding symtab. Since COMP_DIR is not used in the name of the
11410 symtab we don't use it in the name of the psymtabs we create.
11411 E.g. expand_line_sal requires this when finding psymtabs to expand.
11412 A good testcase for this is mb-inline.exp. */
11415 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
11416 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
11417 int want_line_info
)
11419 struct objfile
*objfile
= cu
->objfile
;
11420 const int decode_for_pst_p
= (pst
!= NULL
);
11421 struct subfile
*first_subfile
= current_subfile
;
11423 if (want_line_info
)
11424 dwarf_decode_lines_1 (lh
, comp_dir
, cu
, pst
);
11426 if (decode_for_pst_p
)
11430 /* Now that we're done scanning the Line Header Program, we can
11431 create the psymtab of each included file. */
11432 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
11433 if (lh
->file_names
[file_index
].included_p
== 1)
11435 char *include_name
=
11436 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
11437 if (include_name
!= NULL
)
11438 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
11443 /* Make sure a symtab is created for every file, even files
11444 which contain only variables (i.e. no code with associated
11448 for (i
= 0; i
< lh
->num_file_names
; i
++)
11451 struct file_entry
*fe
;
11453 fe
= &lh
->file_names
[i
];
11455 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11456 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
11458 /* Skip the main file; we don't need it, and it must be
11459 allocated last, so that it will show up before the
11460 non-primary symtabs in the objfile's symtab list. */
11461 if (current_subfile
== first_subfile
)
11464 if (current_subfile
->symtab
== NULL
)
11465 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
11467 fe
->symtab
= current_subfile
->symtab
;
11472 /* Start a subfile for DWARF. FILENAME is the name of the file and
11473 DIRNAME the name of the source directory which contains FILENAME
11474 or NULL if not known. COMP_DIR is the compilation directory for the
11475 linetable's compilation unit or NULL if not known.
11476 This routine tries to keep line numbers from identical absolute and
11477 relative file names in a common subfile.
11479 Using the `list' example from the GDB testsuite, which resides in
11480 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
11481 of /srcdir/list0.c yields the following debugging information for list0.c:
11483 DW_AT_name: /srcdir/list0.c
11484 DW_AT_comp_dir: /compdir
11485 files.files[0].name: list0.h
11486 files.files[0].dir: /srcdir
11487 files.files[1].name: list0.c
11488 files.files[1].dir: /srcdir
11490 The line number information for list0.c has to end up in a single
11491 subfile, so that `break /srcdir/list0.c:1' works as expected.
11492 start_subfile will ensure that this happens provided that we pass the
11493 concatenation of files.files[1].dir and files.files[1].name as the
11497 dwarf2_start_subfile (char *filename
, const char *dirname
,
11498 const char *comp_dir
)
11502 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
11503 `start_symtab' will always pass the contents of DW_AT_comp_dir as
11504 second argument to start_subfile. To be consistent, we do the
11505 same here. In order not to lose the line information directory,
11506 we concatenate it to the filename when it makes sense.
11507 Note that the Dwarf3 standard says (speaking of filenames in line
11508 information): ``The directory index is ignored for file names
11509 that represent full path names''. Thus ignoring dirname in the
11510 `else' branch below isn't an issue. */
11512 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
11513 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
11515 fullname
= filename
;
11517 start_subfile (fullname
, comp_dir
);
11519 if (fullname
!= filename
)
11524 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
11525 struct dwarf2_cu
*cu
)
11527 struct objfile
*objfile
= cu
->objfile
;
11528 struct comp_unit_head
*cu_header
= &cu
->header
;
11530 /* NOTE drow/2003-01-30: There used to be a comment and some special
11531 code here to turn a symbol with DW_AT_external and a
11532 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
11533 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
11534 with some versions of binutils) where shared libraries could have
11535 relocations against symbols in their debug information - the
11536 minimal symbol would have the right address, but the debug info
11537 would not. It's no longer necessary, because we will explicitly
11538 apply relocations when we read in the debug information now. */
11540 /* A DW_AT_location attribute with no contents indicates that a
11541 variable has been optimized away. */
11542 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
11544 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
11548 /* Handle one degenerate form of location expression specially, to
11549 preserve GDB's previous behavior when section offsets are
11550 specified. If this is just a DW_OP_addr then mark this symbol
11553 if (attr_form_is_block (attr
)
11554 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
11555 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
11557 unsigned int dummy
;
11559 SYMBOL_VALUE_ADDRESS (sym
) =
11560 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
11561 SYMBOL_CLASS (sym
) = LOC_STATIC
;
11562 fixup_symbol_section (sym
, objfile
);
11563 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
11564 SYMBOL_SECTION (sym
));
11568 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
11569 expression evaluator, and use LOC_COMPUTED only when necessary
11570 (i.e. when the value of a register or memory location is
11571 referenced, or a thread-local block, etc.). Then again, it might
11572 not be worthwhile. I'm assuming that it isn't unless performance
11573 or memory numbers show me otherwise. */
11575 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
11576 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11578 if (SYMBOL_COMPUTED_OPS (sym
) == &dwarf2_loclist_funcs
)
11579 cu
->has_loclist
= 1;
11582 /* Given a pointer to a DWARF information entry, figure out if we need
11583 to make a symbol table entry for it, and if so, create a new entry
11584 and return a pointer to it.
11585 If TYPE is NULL, determine symbol type from the die, otherwise
11586 used the passed type.
11587 If SPACE is not NULL, use it to hold the new symbol. If it is
11588 NULL, allocate a new symbol on the objfile's obstack. */
11590 static struct symbol
*
11591 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
11592 struct symbol
*space
)
11594 struct objfile
*objfile
= cu
->objfile
;
11595 struct symbol
*sym
= NULL
;
11597 struct attribute
*attr
= NULL
;
11598 struct attribute
*attr2
= NULL
;
11599 CORE_ADDR baseaddr
;
11600 struct pending
**list_to_add
= NULL
;
11602 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
11604 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11606 name
= dwarf2_name (die
, cu
);
11609 const char *linkagename
;
11610 int suppress_add
= 0;
11615 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
11616 OBJSTAT (objfile
, n_syms
++);
11618 /* Cache this symbol's name and the name's demangled form (if any). */
11619 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
11620 linkagename
= dwarf2_physname (name
, die
, cu
);
11621 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
11623 /* Fortran does not have mangling standard and the mangling does differ
11624 between gfortran, iFort etc. */
11625 if (cu
->language
== language_fortran
11626 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
11627 symbol_set_demangled_name (&(sym
->ginfo
),
11628 (char *) dwarf2_full_name (name
, die
, cu
),
11631 /* Default assumptions.
11632 Use the passed type or decode it from the die. */
11633 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11634 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
11636 SYMBOL_TYPE (sym
) = type
;
11638 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
11639 attr
= dwarf2_attr (die
,
11640 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
11644 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
11647 attr
= dwarf2_attr (die
,
11648 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
11652 int file_index
= DW_UNSND (attr
);
11654 if (cu
->line_header
== NULL
11655 || file_index
> cu
->line_header
->num_file_names
)
11656 complaint (&symfile_complaints
,
11657 _("file index out of range"));
11658 else if (file_index
> 0)
11660 struct file_entry
*fe
;
11662 fe
= &cu
->line_header
->file_names
[file_index
- 1];
11663 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
11670 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
11673 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
11675 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
11676 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
11677 SYMBOL_CLASS (sym
) = LOC_LABEL
;
11678 add_symbol_to_list (sym
, cu
->list_in_scope
);
11680 case DW_TAG_subprogram
:
11681 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
11683 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
11684 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11685 if ((attr2
&& (DW_UNSND (attr2
) != 0))
11686 || cu
->language
== language_ada
)
11688 /* Subprograms marked external are stored as a global symbol.
11689 Ada subprograms, whether marked external or not, are always
11690 stored as a global symbol, because we want to be able to
11691 access them globally. For instance, we want to be able
11692 to break on a nested subprogram without having to
11693 specify the context. */
11694 list_to_add
= &global_symbols
;
11698 list_to_add
= cu
->list_in_scope
;
11701 case DW_TAG_inlined_subroutine
:
11702 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
11704 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
11705 SYMBOL_INLINED (sym
) = 1;
11706 /* Do not add the symbol to any lists. It will be found via
11707 BLOCK_FUNCTION from the blockvector. */
11709 case DW_TAG_template_value_param
:
11711 /* Fall through. */
11712 case DW_TAG_constant
:
11713 case DW_TAG_variable
:
11714 case DW_TAG_member
:
11715 /* Compilation with minimal debug info may result in
11716 variables with missing type entries. Change the
11717 misleading `void' type to something sensible. */
11718 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
11720 = objfile_type (objfile
)->nodebug_data_symbol
;
11722 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11723 /* In the case of DW_TAG_member, we should only be called for
11724 static const members. */
11725 if (die
->tag
== DW_TAG_member
)
11727 /* dwarf2_add_field uses die_is_declaration,
11728 so we do the same. */
11729 gdb_assert (die_is_declaration (die
, cu
));
11734 dwarf2_const_value (attr
, sym
, cu
);
11735 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11738 if (attr2
&& (DW_UNSND (attr2
) != 0))
11739 list_to_add
= &global_symbols
;
11741 list_to_add
= cu
->list_in_scope
;
11745 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11748 var_decode_location (attr
, sym
, cu
);
11749 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11750 if (SYMBOL_CLASS (sym
) == LOC_STATIC
11751 && SYMBOL_VALUE_ADDRESS (sym
) == 0
11752 && !dwarf2_per_objfile
->has_section_at_zero
)
11754 /* When a static variable is eliminated by the linker,
11755 the corresponding debug information is not stripped
11756 out, but the variable address is set to null;
11757 do not add such variables into symbol table. */
11759 else if (attr2
&& (DW_UNSND (attr2
) != 0))
11761 /* Workaround gfortran PR debug/40040 - it uses
11762 DW_AT_location for variables in -fPIC libraries which may
11763 get overriden by other libraries/executable and get
11764 a different address. Resolve it by the minimal symbol
11765 which may come from inferior's executable using copy
11766 relocation. Make this workaround only for gfortran as for
11767 other compilers GDB cannot guess the minimal symbol
11768 Fortran mangling kind. */
11769 if (cu
->language
== language_fortran
&& die
->parent
11770 && die
->parent
->tag
== DW_TAG_module
11772 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
11773 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
11775 /* A variable with DW_AT_external is never static,
11776 but it may be block-scoped. */
11777 list_to_add
= (cu
->list_in_scope
== &file_symbols
11778 ? &global_symbols
: cu
->list_in_scope
);
11781 list_to_add
= cu
->list_in_scope
;
11785 /* We do not know the address of this symbol.
11786 If it is an external symbol and we have type information
11787 for it, enter the symbol as a LOC_UNRESOLVED symbol.
11788 The address of the variable will then be determined from
11789 the minimal symbol table whenever the variable is
11791 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
11792 if (attr2
&& (DW_UNSND (attr2
) != 0)
11793 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
11795 /* A variable with DW_AT_external is never static, but it
11796 may be block-scoped. */
11797 list_to_add
= (cu
->list_in_scope
== &file_symbols
11798 ? &global_symbols
: cu
->list_in_scope
);
11800 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
11802 else if (!die_is_declaration (die
, cu
))
11804 /* Use the default LOC_OPTIMIZED_OUT class. */
11805 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
11807 list_to_add
= cu
->list_in_scope
;
11811 case DW_TAG_formal_parameter
:
11812 /* If we are inside a function, mark this as an argument. If
11813 not, we might be looking at an argument to an inlined function
11814 when we do not have enough information to show inlined frames;
11815 pretend it's a local variable in that case so that the user can
11817 if (context_stack_depth
> 0
11818 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
11819 SYMBOL_IS_ARGUMENT (sym
) = 1;
11820 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
11823 var_decode_location (attr
, sym
, cu
);
11825 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11828 dwarf2_const_value (attr
, sym
, cu
);
11831 list_to_add
= cu
->list_in_scope
;
11833 case DW_TAG_unspecified_parameters
:
11834 /* From varargs functions; gdb doesn't seem to have any
11835 interest in this information, so just ignore it for now.
11838 case DW_TAG_template_type_param
:
11840 /* Fall through. */
11841 case DW_TAG_class_type
:
11842 case DW_TAG_interface_type
:
11843 case DW_TAG_structure_type
:
11844 case DW_TAG_union_type
:
11845 case DW_TAG_set_type
:
11846 case DW_TAG_enumeration_type
:
11847 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11848 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
11851 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
11852 really ever be static objects: otherwise, if you try
11853 to, say, break of a class's method and you're in a file
11854 which doesn't mention that class, it won't work unless
11855 the check for all static symbols in lookup_symbol_aux
11856 saves you. See the OtherFileClass tests in
11857 gdb.c++/namespace.exp. */
11861 list_to_add
= (cu
->list_in_scope
== &file_symbols
11862 && (cu
->language
== language_cplus
11863 || cu
->language
== language_java
)
11864 ? &global_symbols
: cu
->list_in_scope
);
11866 /* The semantics of C++ state that "struct foo {
11867 ... }" also defines a typedef for "foo". A Java
11868 class declaration also defines a typedef for the
11870 if (cu
->language
== language_cplus
11871 || cu
->language
== language_java
11872 || cu
->language
== language_ada
)
11874 /* The symbol's name is already allocated along
11875 with this objfile, so we don't need to
11876 duplicate it for the type. */
11877 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
11878 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
11883 case DW_TAG_typedef
:
11884 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11885 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11886 list_to_add
= cu
->list_in_scope
;
11888 case DW_TAG_base_type
:
11889 case DW_TAG_subrange_type
:
11890 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11891 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
11892 list_to_add
= cu
->list_in_scope
;
11894 case DW_TAG_enumerator
:
11895 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
11898 dwarf2_const_value (attr
, sym
, cu
);
11901 /* NOTE: carlton/2003-11-10: See comment above in the
11902 DW_TAG_class_type, etc. block. */
11904 list_to_add
= (cu
->list_in_scope
== &file_symbols
11905 && (cu
->language
== language_cplus
11906 || cu
->language
== language_java
)
11907 ? &global_symbols
: cu
->list_in_scope
);
11910 case DW_TAG_namespace
:
11911 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
11912 list_to_add
= &global_symbols
;
11915 /* Not a tag we recognize. Hopefully we aren't processing
11916 trash data, but since we must specifically ignore things
11917 we don't recognize, there is nothing else we should do at
11919 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
11920 dwarf_tag_name (die
->tag
));
11926 sym
->hash_next
= objfile
->template_symbols
;
11927 objfile
->template_symbols
= sym
;
11928 list_to_add
= NULL
;
11931 if (list_to_add
!= NULL
)
11932 add_symbol_to_list (sym
, list_to_add
);
11934 /* For the benefit of old versions of GCC, check for anonymous
11935 namespaces based on the demangled name. */
11936 if (!processing_has_namespace_info
11937 && cu
->language
== language_cplus
)
11938 cp_scan_for_anonymous_namespaces (sym
, objfile
);
11943 /* A wrapper for new_symbol_full that always allocates a new symbol. */
11945 static struct symbol
*
11946 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11948 return new_symbol_full (die
, type
, cu
, NULL
);
11951 /* Given an attr with a DW_FORM_dataN value in host byte order,
11952 zero-extend it as appropriate for the symbol's type. The DWARF
11953 standard (v4) is not entirely clear about the meaning of using
11954 DW_FORM_dataN for a constant with a signed type, where the type is
11955 wider than the data. The conclusion of a discussion on the DWARF
11956 list was that this is unspecified. We choose to always zero-extend
11957 because that is the interpretation long in use by GCC. */
11960 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
11961 const char *name
, struct obstack
*obstack
,
11962 struct dwarf2_cu
*cu
, long *value
, int bits
)
11964 struct objfile
*objfile
= cu
->objfile
;
11965 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
11966 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
11967 LONGEST l
= DW_UNSND (attr
);
11969 if (bits
< sizeof (*value
) * 8)
11971 l
&= ((LONGEST
) 1 << bits
) - 1;
11974 else if (bits
== sizeof (*value
) * 8)
11978 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
11979 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
11986 /* Read a constant value from an attribute. Either set *VALUE, or if
11987 the value does not fit in *VALUE, set *BYTES - either already
11988 allocated on the objfile obstack, or newly allocated on OBSTACK,
11989 or, set *BATON, if we translated the constant to a location
11993 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
11994 const char *name
, struct obstack
*obstack
,
11995 struct dwarf2_cu
*cu
,
11996 long *value
, gdb_byte
**bytes
,
11997 struct dwarf2_locexpr_baton
**baton
)
11999 struct objfile
*objfile
= cu
->objfile
;
12000 struct comp_unit_head
*cu_header
= &cu
->header
;
12001 struct dwarf_block
*blk
;
12002 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
12003 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
12009 switch (attr
->form
)
12015 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
12016 dwarf2_const_value_length_mismatch_complaint (name
,
12017 cu_header
->addr_size
,
12018 TYPE_LENGTH (type
));
12019 /* Symbols of this form are reasonably rare, so we just
12020 piggyback on the existing location code rather than writing
12021 a new implementation of symbol_computed_ops. */
12022 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
12023 sizeof (struct dwarf2_locexpr_baton
));
12024 (*baton
)->per_cu
= cu
->per_cu
;
12025 gdb_assert ((*baton
)->per_cu
);
12027 (*baton
)->size
= 2 + cu_header
->addr_size
;
12028 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
12029 (*baton
)->data
= data
;
12031 data
[0] = DW_OP_addr
;
12032 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
12033 byte_order
, DW_ADDR (attr
));
12034 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
12037 case DW_FORM_string
:
12039 /* DW_STRING is already allocated on the objfile obstack, point
12041 *bytes
= (gdb_byte
*) DW_STRING (attr
);
12043 case DW_FORM_block1
:
12044 case DW_FORM_block2
:
12045 case DW_FORM_block4
:
12046 case DW_FORM_block
:
12047 case DW_FORM_exprloc
:
12048 blk
= DW_BLOCK (attr
);
12049 if (TYPE_LENGTH (type
) != blk
->size
)
12050 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
12051 TYPE_LENGTH (type
));
12052 *bytes
= blk
->data
;
12055 /* The DW_AT_const_value attributes are supposed to carry the
12056 symbol's value "represented as it would be on the target
12057 architecture." By the time we get here, it's already been
12058 converted to host endianness, so we just need to sign- or
12059 zero-extend it as appropriate. */
12060 case DW_FORM_data1
:
12061 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12062 obstack
, cu
, value
, 8);
12064 case DW_FORM_data2
:
12065 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12066 obstack
, cu
, value
, 16);
12068 case DW_FORM_data4
:
12069 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12070 obstack
, cu
, value
, 32);
12072 case DW_FORM_data8
:
12073 *bytes
= dwarf2_const_value_data (attr
, type
, name
,
12074 obstack
, cu
, value
, 64);
12077 case DW_FORM_sdata
:
12078 *value
= DW_SND (attr
);
12081 case DW_FORM_udata
:
12082 *value
= DW_UNSND (attr
);
12086 complaint (&symfile_complaints
,
12087 _("unsupported const value attribute form: '%s'"),
12088 dwarf_form_name (attr
->form
));
12095 /* Copy constant value from an attribute to a symbol. */
12098 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
12099 struct dwarf2_cu
*cu
)
12101 struct objfile
*objfile
= cu
->objfile
;
12102 struct comp_unit_head
*cu_header
= &cu
->header
;
12105 struct dwarf2_locexpr_baton
*baton
;
12107 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
12108 SYMBOL_PRINT_NAME (sym
),
12109 &objfile
->objfile_obstack
, cu
,
12110 &value
, &bytes
, &baton
);
12114 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
12115 SYMBOL_LOCATION_BATON (sym
) = baton
;
12116 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
12118 else if (bytes
!= NULL
)
12120 SYMBOL_VALUE_BYTES (sym
) = bytes
;
12121 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
12125 SYMBOL_VALUE (sym
) = value
;
12126 SYMBOL_CLASS (sym
) = LOC_CONST
;
12130 /* Return the type of the die in question using its DW_AT_type attribute. */
12132 static struct type
*
12133 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12135 struct attribute
*type_attr
;
12137 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
12140 /* A missing DW_AT_type represents a void type. */
12141 return objfile_type (cu
->objfile
)->builtin_void
;
12144 return lookup_die_type (die
, type_attr
, cu
);
12147 /* True iff CU's producer generates GNAT Ada auxiliary information
12148 that allows to find parallel types through that information instead
12149 of having to do expensive parallel lookups by type name. */
12152 need_gnat_info (struct dwarf2_cu
*cu
)
12154 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
12155 of GNAT produces this auxiliary information, without any indication
12156 that it is produced. Part of enhancing the FSF version of GNAT
12157 to produce that information will be to put in place an indicator
12158 that we can use in order to determine whether the descriptive type
12159 info is available or not. One suggestion that has been made is
12160 to use a new attribute, attached to the CU die. For now, assume
12161 that the descriptive type info is not available. */
12165 /* Return the auxiliary type of the die in question using its
12166 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
12167 attribute is not present. */
12169 static struct type
*
12170 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12172 struct attribute
*type_attr
;
12174 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
12178 return lookup_die_type (die
, type_attr
, cu
);
12181 /* If DIE has a descriptive_type attribute, then set the TYPE's
12182 descriptive type accordingly. */
12185 set_descriptive_type (struct type
*type
, struct die_info
*die
,
12186 struct dwarf2_cu
*cu
)
12188 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
12190 if (descriptive_type
)
12192 ALLOCATE_GNAT_AUX_TYPE (type
);
12193 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
12197 /* Return the containing type of the die in question using its
12198 DW_AT_containing_type attribute. */
12200 static struct type
*
12201 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12203 struct attribute
*type_attr
;
12205 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
12207 error (_("Dwarf Error: Problem turning containing type into gdb type "
12208 "[in module %s]"), cu
->objfile
->name
);
12210 return lookup_die_type (die
, type_attr
, cu
);
12213 /* Look up the type of DIE in CU using its type attribute ATTR.
12214 If there is no type substitute an error marker. */
12216 static struct type
*
12217 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
12218 struct dwarf2_cu
*cu
)
12220 struct objfile
*objfile
= cu
->objfile
;
12221 struct type
*this_type
;
12223 /* First see if we have it cached. */
12225 if (is_ref_attr (attr
))
12227 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
12229 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
12231 else if (attr
->form
== DW_FORM_ref_sig8
)
12233 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
12234 struct dwarf2_cu
*sig_cu
;
12235 unsigned int offset
;
12237 /* sig_type will be NULL if the signatured type is missing from
12239 if (sig_type
== NULL
)
12240 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12241 "at 0x%x [in module %s]"),
12242 die
->offset
, objfile
->name
);
12244 gdb_assert (sig_type
->per_cu
.debug_types_section
);
12245 offset
= sig_type
->per_cu
.offset
+ sig_type
->type_offset
;
12246 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
12250 dump_die_for_error (die
);
12251 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
12252 dwarf_attr_name (attr
->name
), objfile
->name
);
12255 /* If not cached we need to read it in. */
12257 if (this_type
== NULL
)
12259 struct die_info
*type_die
;
12260 struct dwarf2_cu
*type_cu
= cu
;
12262 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
12263 /* If the type is cached, we should have found it above. */
12264 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
12265 this_type
= read_type_die_1 (type_die
, type_cu
);
12268 /* If we still don't have a type use an error marker. */
12270 if (this_type
== NULL
)
12272 char *message
, *saved
;
12274 /* read_type_die already issued a complaint. */
12275 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
12279 saved
= obstack_copy0 (&objfile
->objfile_obstack
,
12280 message
, strlen (message
));
12283 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, objfile
);
12289 /* Return the type in DIE, CU.
12290 Returns NULL for invalid types.
12292 This first does a lookup in the appropriate type_hash table,
12293 and only reads the die in if necessary.
12295 NOTE: This can be called when reading in partial or full symbols. */
12297 static struct type
*
12298 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
12300 struct type
*this_type
;
12302 this_type
= get_die_type (die
, cu
);
12306 return read_type_die_1 (die
, cu
);
12309 /* Read the type in DIE, CU.
12310 Returns NULL for invalid types. */
12312 static struct type
*
12313 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
12315 struct type
*this_type
= NULL
;
12319 case DW_TAG_class_type
:
12320 case DW_TAG_interface_type
:
12321 case DW_TAG_structure_type
:
12322 case DW_TAG_union_type
:
12323 this_type
= read_structure_type (die
, cu
);
12325 case DW_TAG_enumeration_type
:
12326 this_type
= read_enumeration_type (die
, cu
);
12328 case DW_TAG_subprogram
:
12329 case DW_TAG_subroutine_type
:
12330 case DW_TAG_inlined_subroutine
:
12331 this_type
= read_subroutine_type (die
, cu
);
12333 case DW_TAG_array_type
:
12334 this_type
= read_array_type (die
, cu
);
12336 case DW_TAG_set_type
:
12337 this_type
= read_set_type (die
, cu
);
12339 case DW_TAG_pointer_type
:
12340 this_type
= read_tag_pointer_type (die
, cu
);
12342 case DW_TAG_ptr_to_member_type
:
12343 this_type
= read_tag_ptr_to_member_type (die
, cu
);
12345 case DW_TAG_reference_type
:
12346 this_type
= read_tag_reference_type (die
, cu
);
12348 case DW_TAG_const_type
:
12349 this_type
= read_tag_const_type (die
, cu
);
12351 case DW_TAG_volatile_type
:
12352 this_type
= read_tag_volatile_type (die
, cu
);
12354 case DW_TAG_string_type
:
12355 this_type
= read_tag_string_type (die
, cu
);
12357 case DW_TAG_typedef
:
12358 this_type
= read_typedef (die
, cu
);
12360 case DW_TAG_subrange_type
:
12361 this_type
= read_subrange_type (die
, cu
);
12363 case DW_TAG_base_type
:
12364 this_type
= read_base_type (die
, cu
);
12366 case DW_TAG_unspecified_type
:
12367 this_type
= read_unspecified_type (die
, cu
);
12369 case DW_TAG_namespace
:
12370 this_type
= read_namespace_type (die
, cu
);
12372 case DW_TAG_module
:
12373 this_type
= read_module_type (die
, cu
);
12376 complaint (&symfile_complaints
,
12377 _("unexpected tag in read_type_die: '%s'"),
12378 dwarf_tag_name (die
->tag
));
12385 /* See if we can figure out if the class lives in a namespace. We do
12386 this by looking for a member function; its demangled name will
12387 contain namespace info, if there is any.
12388 Return the computed name or NULL.
12389 Space for the result is allocated on the objfile's obstack.
12390 This is the full-die version of guess_partial_die_structure_name.
12391 In this case we know DIE has no useful parent. */
12394 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
12396 struct die_info
*spec_die
;
12397 struct dwarf2_cu
*spec_cu
;
12398 struct die_info
*child
;
12401 spec_die
= die_specification (die
, &spec_cu
);
12402 if (spec_die
!= NULL
)
12408 for (child
= die
->child
;
12410 child
= child
->sibling
)
12412 if (child
->tag
== DW_TAG_subprogram
)
12414 struct attribute
*attr
;
12416 attr
= dwarf2_attr (child
, DW_AT_linkage_name
, cu
);
12418 attr
= dwarf2_attr (child
, DW_AT_MIPS_linkage_name
, cu
);
12422 = language_class_name_from_physname (cu
->language_defn
,
12426 if (actual_name
!= NULL
)
12428 char *die_name
= dwarf2_name (die
, cu
);
12430 if (die_name
!= NULL
12431 && strcmp (die_name
, actual_name
) != 0)
12433 /* Strip off the class name from the full name.
12434 We want the prefix. */
12435 int die_name_len
= strlen (die_name
);
12436 int actual_name_len
= strlen (actual_name
);
12438 /* Test for '::' as a sanity check. */
12439 if (actual_name_len
> die_name_len
+ 2
12440 && actual_name
[actual_name_len
12441 - die_name_len
- 1] == ':')
12443 obsavestring (actual_name
,
12444 actual_name_len
- die_name_len
- 2,
12445 &cu
->objfile
->objfile_obstack
);
12448 xfree (actual_name
);
12457 /* GCC might emit a nameless typedef that has a linkage name. Determine the
12458 prefix part in such case. See
12459 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
12462 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
12464 struct attribute
*attr
;
12467 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
12468 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
12471 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
12472 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
12475 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
12477 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
12478 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
12481 /* dwarf2_name had to be already called. */
12482 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
12484 /* Strip the base name, keep any leading namespaces/classes. */
12485 base
= strrchr (DW_STRING (attr
), ':');
12486 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
12489 return obsavestring (DW_STRING (attr
), &base
[-1] - DW_STRING (attr
),
12490 &cu
->objfile
->objfile_obstack
);
12493 /* Return the name of the namespace/class that DIE is defined within,
12494 or "" if we can't tell. The caller should not xfree the result.
12496 For example, if we're within the method foo() in the following
12506 then determine_prefix on foo's die will return "N::C". */
12508 static const char *
12509 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
12511 struct die_info
*parent
, *spec_die
;
12512 struct dwarf2_cu
*spec_cu
;
12513 struct type
*parent_type
;
12516 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
12517 && cu
->language
!= language_fortran
)
12520 retval
= anonymous_struct_prefix (die
, cu
);
12524 /* We have to be careful in the presence of DW_AT_specification.
12525 For example, with GCC 3.4, given the code
12529 // Definition of N::foo.
12533 then we'll have a tree of DIEs like this:
12535 1: DW_TAG_compile_unit
12536 2: DW_TAG_namespace // N
12537 3: DW_TAG_subprogram // declaration of N::foo
12538 4: DW_TAG_subprogram // definition of N::foo
12539 DW_AT_specification // refers to die #3
12541 Thus, when processing die #4, we have to pretend that we're in
12542 the context of its DW_AT_specification, namely the contex of die
12545 spec_die
= die_specification (die
, &spec_cu
);
12546 if (spec_die
== NULL
)
12547 parent
= die
->parent
;
12550 parent
= spec_die
->parent
;
12554 if (parent
== NULL
)
12556 else if (parent
->building_fullname
)
12559 const char *parent_name
;
12561 /* It has been seen on RealView 2.2 built binaries,
12562 DW_TAG_template_type_param types actually _defined_ as
12563 children of the parent class:
12566 template class <class Enum> Class{};
12567 Class<enum E> class_e;
12569 1: DW_TAG_class_type (Class)
12570 2: DW_TAG_enumeration_type (E)
12571 3: DW_TAG_enumerator (enum1:0)
12572 3: DW_TAG_enumerator (enum2:1)
12574 2: DW_TAG_template_type_param
12575 DW_AT_type DW_FORM_ref_udata (E)
12577 Besides being broken debug info, it can put GDB into an
12578 infinite loop. Consider:
12580 When we're building the full name for Class<E>, we'll start
12581 at Class, and go look over its template type parameters,
12582 finding E. We'll then try to build the full name of E, and
12583 reach here. We're now trying to build the full name of E,
12584 and look over the parent DIE for containing scope. In the
12585 broken case, if we followed the parent DIE of E, we'd again
12586 find Class, and once again go look at its template type
12587 arguments, etc., etc. Simply don't consider such parent die
12588 as source-level parent of this die (it can't be, the language
12589 doesn't allow it), and break the loop here. */
12590 name
= dwarf2_name (die
, cu
);
12591 parent_name
= dwarf2_name (parent
, cu
);
12592 complaint (&symfile_complaints
,
12593 _("template param type '%s' defined within parent '%s'"),
12594 name
? name
: "<unknown>",
12595 parent_name
? parent_name
: "<unknown>");
12599 switch (parent
->tag
)
12601 case DW_TAG_namespace
:
12602 parent_type
= read_type_die (parent
, cu
);
12603 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
12604 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
12605 Work around this problem here. */
12606 if (cu
->language
== language_cplus
12607 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
12609 /* We give a name to even anonymous namespaces. */
12610 return TYPE_TAG_NAME (parent_type
);
12611 case DW_TAG_class_type
:
12612 case DW_TAG_interface_type
:
12613 case DW_TAG_structure_type
:
12614 case DW_TAG_union_type
:
12615 case DW_TAG_module
:
12616 parent_type
= read_type_die (parent
, cu
);
12617 if (TYPE_TAG_NAME (parent_type
) != NULL
)
12618 return TYPE_TAG_NAME (parent_type
);
12620 /* An anonymous structure is only allowed non-static data
12621 members; no typedefs, no member functions, et cetera.
12622 So it does not need a prefix. */
12624 case DW_TAG_compile_unit
:
12625 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
12626 if (cu
->language
== language_cplus
12627 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
12628 && die
->child
!= NULL
12629 && (die
->tag
== DW_TAG_class_type
12630 || die
->tag
== DW_TAG_structure_type
12631 || die
->tag
== DW_TAG_union_type
))
12633 char *name
= guess_full_die_structure_name (die
, cu
);
12639 return determine_prefix (parent
, cu
);
12643 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
12644 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
12645 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
12646 an obconcat, otherwise allocate storage for the result. The CU argument is
12647 used to determine the language and hence, the appropriate separator. */
12649 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
12652 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
12653 int physname
, struct dwarf2_cu
*cu
)
12655 const char *lead
= "";
12658 if (suffix
== NULL
|| suffix
[0] == '\0'
12659 || prefix
== NULL
|| prefix
[0] == '\0')
12661 else if (cu
->language
== language_java
)
12663 else if (cu
->language
== language_fortran
&& physname
)
12665 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
12666 DW_AT_MIPS_linkage_name is preferred and used instead. */
12674 if (prefix
== NULL
)
12676 if (suffix
== NULL
)
12682 = xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
12684 strcpy (retval
, lead
);
12685 strcat (retval
, prefix
);
12686 strcat (retval
, sep
);
12687 strcat (retval
, suffix
);
12692 /* We have an obstack. */
12693 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
12697 /* Return sibling of die, NULL if no sibling. */
12699 static struct die_info
*
12700 sibling_die (struct die_info
*die
)
12702 return die
->sibling
;
12705 /* Get name of a die, return NULL if not found. */
12708 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
12709 struct obstack
*obstack
)
12711 if (name
&& cu
->language
== language_cplus
)
12713 char *canon_name
= cp_canonicalize_string (name
);
12715 if (canon_name
!= NULL
)
12717 if (strcmp (canon_name
, name
) != 0)
12718 name
= obsavestring (canon_name
, strlen (canon_name
),
12720 xfree (canon_name
);
12727 /* Get name of a die, return NULL if not found. */
12730 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
12732 struct attribute
*attr
;
12734 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
12735 if ((!attr
|| !DW_STRING (attr
))
12736 && die
->tag
!= DW_TAG_class_type
12737 && die
->tag
!= DW_TAG_interface_type
12738 && die
->tag
!= DW_TAG_structure_type
12739 && die
->tag
!= DW_TAG_union_type
)
12744 case DW_TAG_compile_unit
:
12745 /* Compilation units have a DW_AT_name that is a filename, not
12746 a source language identifier. */
12747 case DW_TAG_enumeration_type
:
12748 case DW_TAG_enumerator
:
12749 /* These tags always have simple identifiers already; no need
12750 to canonicalize them. */
12751 return DW_STRING (attr
);
12753 case DW_TAG_subprogram
:
12754 /* Java constructors will all be named "<init>", so return
12755 the class name when we see this special case. */
12756 if (cu
->language
== language_java
12757 && DW_STRING (attr
) != NULL
12758 && strcmp (DW_STRING (attr
), "<init>") == 0)
12760 struct dwarf2_cu
*spec_cu
= cu
;
12761 struct die_info
*spec_die
;
12763 /* GCJ will output '<init>' for Java constructor names.
12764 For this special case, return the name of the parent class. */
12766 /* GCJ may output suprogram DIEs with AT_specification set.
12767 If so, use the name of the specified DIE. */
12768 spec_die
= die_specification (die
, &spec_cu
);
12769 if (spec_die
!= NULL
)
12770 return dwarf2_name (spec_die
, spec_cu
);
12775 if (die
->tag
== DW_TAG_class_type
)
12776 return dwarf2_name (die
, cu
);
12778 while (die
->tag
!= DW_TAG_compile_unit
);
12782 case DW_TAG_class_type
:
12783 case DW_TAG_interface_type
:
12784 case DW_TAG_structure_type
:
12785 case DW_TAG_union_type
:
12786 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
12787 structures or unions. These were of the form "._%d" in GCC 4.1,
12788 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
12789 and GCC 4.4. We work around this problem by ignoring these. */
12790 if (attr
&& DW_STRING (attr
)
12791 && (strncmp (DW_STRING (attr
), "._", 2) == 0
12792 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0))
12795 /* GCC might emit a nameless typedef that has a linkage name. See
12796 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
12797 if (!attr
|| DW_STRING (attr
) == NULL
)
12799 char *demangled
= NULL
;
12801 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
12803 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
12805 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
12808 /* Avoid demangling DW_STRING (attr) the second time on a second
12809 call for the same DIE. */
12810 if (!DW_STRING_IS_CANONICAL (attr
))
12811 demangled
= cplus_demangle (DW_STRING (attr
), DMGL_TYPES
);
12817 /* FIXME: we already did this for the partial symbol... */
12818 DW_STRING (attr
) = obsavestring (demangled
, strlen (demangled
),
12819 &cu
->objfile
->objfile_obstack
);
12820 DW_STRING_IS_CANONICAL (attr
) = 1;
12823 /* Strip any leading namespaces/classes, keep only the base name.
12824 DW_AT_name for named DIEs does not contain the prefixes. */
12825 base
= strrchr (DW_STRING (attr
), ':');
12826 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
12829 return DW_STRING (attr
);
12838 if (!DW_STRING_IS_CANONICAL (attr
))
12841 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
12842 &cu
->objfile
->objfile_obstack
);
12843 DW_STRING_IS_CANONICAL (attr
) = 1;
12845 return DW_STRING (attr
);
12848 /* Return the die that this die in an extension of, or NULL if there
12849 is none. *EXT_CU is the CU containing DIE on input, and the CU
12850 containing the return value on output. */
12852 static struct die_info
*
12853 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
12855 struct attribute
*attr
;
12857 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
12861 return follow_die_ref (die
, attr
, ext_cu
);
12864 /* Convert a DIE tag into its string name. */
12867 dwarf_tag_name (unsigned tag
)
12871 case DW_TAG_padding
:
12872 return "DW_TAG_padding";
12873 case DW_TAG_array_type
:
12874 return "DW_TAG_array_type";
12875 case DW_TAG_class_type
:
12876 return "DW_TAG_class_type";
12877 case DW_TAG_entry_point
:
12878 return "DW_TAG_entry_point";
12879 case DW_TAG_enumeration_type
:
12880 return "DW_TAG_enumeration_type";
12881 case DW_TAG_formal_parameter
:
12882 return "DW_TAG_formal_parameter";
12883 case DW_TAG_imported_declaration
:
12884 return "DW_TAG_imported_declaration";
12886 return "DW_TAG_label";
12887 case DW_TAG_lexical_block
:
12888 return "DW_TAG_lexical_block";
12889 case DW_TAG_member
:
12890 return "DW_TAG_member";
12891 case DW_TAG_pointer_type
:
12892 return "DW_TAG_pointer_type";
12893 case DW_TAG_reference_type
:
12894 return "DW_TAG_reference_type";
12895 case DW_TAG_compile_unit
:
12896 return "DW_TAG_compile_unit";
12897 case DW_TAG_string_type
:
12898 return "DW_TAG_string_type";
12899 case DW_TAG_structure_type
:
12900 return "DW_TAG_structure_type";
12901 case DW_TAG_subroutine_type
:
12902 return "DW_TAG_subroutine_type";
12903 case DW_TAG_typedef
:
12904 return "DW_TAG_typedef";
12905 case DW_TAG_union_type
:
12906 return "DW_TAG_union_type";
12907 case DW_TAG_unspecified_parameters
:
12908 return "DW_TAG_unspecified_parameters";
12909 case DW_TAG_variant
:
12910 return "DW_TAG_variant";
12911 case DW_TAG_common_block
:
12912 return "DW_TAG_common_block";
12913 case DW_TAG_common_inclusion
:
12914 return "DW_TAG_common_inclusion";
12915 case DW_TAG_inheritance
:
12916 return "DW_TAG_inheritance";
12917 case DW_TAG_inlined_subroutine
:
12918 return "DW_TAG_inlined_subroutine";
12919 case DW_TAG_module
:
12920 return "DW_TAG_module";
12921 case DW_TAG_ptr_to_member_type
:
12922 return "DW_TAG_ptr_to_member_type";
12923 case DW_TAG_set_type
:
12924 return "DW_TAG_set_type";
12925 case DW_TAG_subrange_type
:
12926 return "DW_TAG_subrange_type";
12927 case DW_TAG_with_stmt
:
12928 return "DW_TAG_with_stmt";
12929 case DW_TAG_access_declaration
:
12930 return "DW_TAG_access_declaration";
12931 case DW_TAG_base_type
:
12932 return "DW_TAG_base_type";
12933 case DW_TAG_catch_block
:
12934 return "DW_TAG_catch_block";
12935 case DW_TAG_const_type
:
12936 return "DW_TAG_const_type";
12937 case DW_TAG_constant
:
12938 return "DW_TAG_constant";
12939 case DW_TAG_enumerator
:
12940 return "DW_TAG_enumerator";
12941 case DW_TAG_file_type
:
12942 return "DW_TAG_file_type";
12943 case DW_TAG_friend
:
12944 return "DW_TAG_friend";
12945 case DW_TAG_namelist
:
12946 return "DW_TAG_namelist";
12947 case DW_TAG_namelist_item
:
12948 return "DW_TAG_namelist_item";
12949 case DW_TAG_packed_type
:
12950 return "DW_TAG_packed_type";
12951 case DW_TAG_subprogram
:
12952 return "DW_TAG_subprogram";
12953 case DW_TAG_template_type_param
:
12954 return "DW_TAG_template_type_param";
12955 case DW_TAG_template_value_param
:
12956 return "DW_TAG_template_value_param";
12957 case DW_TAG_thrown_type
:
12958 return "DW_TAG_thrown_type";
12959 case DW_TAG_try_block
:
12960 return "DW_TAG_try_block";
12961 case DW_TAG_variant_part
:
12962 return "DW_TAG_variant_part";
12963 case DW_TAG_variable
:
12964 return "DW_TAG_variable";
12965 case DW_TAG_volatile_type
:
12966 return "DW_TAG_volatile_type";
12967 case DW_TAG_dwarf_procedure
:
12968 return "DW_TAG_dwarf_procedure";
12969 case DW_TAG_restrict_type
:
12970 return "DW_TAG_restrict_type";
12971 case DW_TAG_interface_type
:
12972 return "DW_TAG_interface_type";
12973 case DW_TAG_namespace
:
12974 return "DW_TAG_namespace";
12975 case DW_TAG_imported_module
:
12976 return "DW_TAG_imported_module";
12977 case DW_TAG_unspecified_type
:
12978 return "DW_TAG_unspecified_type";
12979 case DW_TAG_partial_unit
:
12980 return "DW_TAG_partial_unit";
12981 case DW_TAG_imported_unit
:
12982 return "DW_TAG_imported_unit";
12983 case DW_TAG_condition
:
12984 return "DW_TAG_condition";
12985 case DW_TAG_shared_type
:
12986 return "DW_TAG_shared_type";
12987 case DW_TAG_type_unit
:
12988 return "DW_TAG_type_unit";
12989 case DW_TAG_MIPS_loop
:
12990 return "DW_TAG_MIPS_loop";
12991 case DW_TAG_HP_array_descriptor
:
12992 return "DW_TAG_HP_array_descriptor";
12993 case DW_TAG_format_label
:
12994 return "DW_TAG_format_label";
12995 case DW_TAG_function_template
:
12996 return "DW_TAG_function_template";
12997 case DW_TAG_class_template
:
12998 return "DW_TAG_class_template";
12999 case DW_TAG_GNU_BINCL
:
13000 return "DW_TAG_GNU_BINCL";
13001 case DW_TAG_GNU_EINCL
:
13002 return "DW_TAG_GNU_EINCL";
13003 case DW_TAG_upc_shared_type
:
13004 return "DW_TAG_upc_shared_type";
13005 case DW_TAG_upc_strict_type
:
13006 return "DW_TAG_upc_strict_type";
13007 case DW_TAG_upc_relaxed_type
:
13008 return "DW_TAG_upc_relaxed_type";
13009 case DW_TAG_PGI_kanji_type
:
13010 return "DW_TAG_PGI_kanji_type";
13011 case DW_TAG_PGI_interface_block
:
13012 return "DW_TAG_PGI_interface_block";
13013 case DW_TAG_GNU_call_site
:
13014 return "DW_TAG_GNU_call_site";
13016 return "DW_TAG_<unknown>";
13020 /* Convert a DWARF attribute code into its string name. */
13023 dwarf_attr_name (unsigned attr
)
13027 case DW_AT_sibling
:
13028 return "DW_AT_sibling";
13029 case DW_AT_location
:
13030 return "DW_AT_location";
13032 return "DW_AT_name";
13033 case DW_AT_ordering
:
13034 return "DW_AT_ordering";
13035 case DW_AT_subscr_data
:
13036 return "DW_AT_subscr_data";
13037 case DW_AT_byte_size
:
13038 return "DW_AT_byte_size";
13039 case DW_AT_bit_offset
:
13040 return "DW_AT_bit_offset";
13041 case DW_AT_bit_size
:
13042 return "DW_AT_bit_size";
13043 case DW_AT_element_list
:
13044 return "DW_AT_element_list";
13045 case DW_AT_stmt_list
:
13046 return "DW_AT_stmt_list";
13048 return "DW_AT_low_pc";
13049 case DW_AT_high_pc
:
13050 return "DW_AT_high_pc";
13051 case DW_AT_language
:
13052 return "DW_AT_language";
13054 return "DW_AT_member";
13056 return "DW_AT_discr";
13057 case DW_AT_discr_value
:
13058 return "DW_AT_discr_value";
13059 case DW_AT_visibility
:
13060 return "DW_AT_visibility";
13062 return "DW_AT_import";
13063 case DW_AT_string_length
:
13064 return "DW_AT_string_length";
13065 case DW_AT_common_reference
:
13066 return "DW_AT_common_reference";
13067 case DW_AT_comp_dir
:
13068 return "DW_AT_comp_dir";
13069 case DW_AT_const_value
:
13070 return "DW_AT_const_value";
13071 case DW_AT_containing_type
:
13072 return "DW_AT_containing_type";
13073 case DW_AT_default_value
:
13074 return "DW_AT_default_value";
13076 return "DW_AT_inline";
13077 case DW_AT_is_optional
:
13078 return "DW_AT_is_optional";
13079 case DW_AT_lower_bound
:
13080 return "DW_AT_lower_bound";
13081 case DW_AT_producer
:
13082 return "DW_AT_producer";
13083 case DW_AT_prototyped
:
13084 return "DW_AT_prototyped";
13085 case DW_AT_return_addr
:
13086 return "DW_AT_return_addr";
13087 case DW_AT_start_scope
:
13088 return "DW_AT_start_scope";
13089 case DW_AT_bit_stride
:
13090 return "DW_AT_bit_stride";
13091 case DW_AT_upper_bound
:
13092 return "DW_AT_upper_bound";
13093 case DW_AT_abstract_origin
:
13094 return "DW_AT_abstract_origin";
13095 case DW_AT_accessibility
:
13096 return "DW_AT_accessibility";
13097 case DW_AT_address_class
:
13098 return "DW_AT_address_class";
13099 case DW_AT_artificial
:
13100 return "DW_AT_artificial";
13101 case DW_AT_base_types
:
13102 return "DW_AT_base_types";
13103 case DW_AT_calling_convention
:
13104 return "DW_AT_calling_convention";
13106 return "DW_AT_count";
13107 case DW_AT_data_member_location
:
13108 return "DW_AT_data_member_location";
13109 case DW_AT_decl_column
:
13110 return "DW_AT_decl_column";
13111 case DW_AT_decl_file
:
13112 return "DW_AT_decl_file";
13113 case DW_AT_decl_line
:
13114 return "DW_AT_decl_line";
13115 case DW_AT_declaration
:
13116 return "DW_AT_declaration";
13117 case DW_AT_discr_list
:
13118 return "DW_AT_discr_list";
13119 case DW_AT_encoding
:
13120 return "DW_AT_encoding";
13121 case DW_AT_external
:
13122 return "DW_AT_external";
13123 case DW_AT_frame_base
:
13124 return "DW_AT_frame_base";
13126 return "DW_AT_friend";
13127 case DW_AT_identifier_case
:
13128 return "DW_AT_identifier_case";
13129 case DW_AT_macro_info
:
13130 return "DW_AT_macro_info";
13131 case DW_AT_namelist_items
:
13132 return "DW_AT_namelist_items";
13133 case DW_AT_priority
:
13134 return "DW_AT_priority";
13135 case DW_AT_segment
:
13136 return "DW_AT_segment";
13137 case DW_AT_specification
:
13138 return "DW_AT_specification";
13139 case DW_AT_static_link
:
13140 return "DW_AT_static_link";
13142 return "DW_AT_type";
13143 case DW_AT_use_location
:
13144 return "DW_AT_use_location";
13145 case DW_AT_variable_parameter
:
13146 return "DW_AT_variable_parameter";
13147 case DW_AT_virtuality
:
13148 return "DW_AT_virtuality";
13149 case DW_AT_vtable_elem_location
:
13150 return "DW_AT_vtable_elem_location";
13151 /* DWARF 3 values. */
13152 case DW_AT_allocated
:
13153 return "DW_AT_allocated";
13154 case DW_AT_associated
:
13155 return "DW_AT_associated";
13156 case DW_AT_data_location
:
13157 return "DW_AT_data_location";
13158 case DW_AT_byte_stride
:
13159 return "DW_AT_byte_stride";
13160 case DW_AT_entry_pc
:
13161 return "DW_AT_entry_pc";
13162 case DW_AT_use_UTF8
:
13163 return "DW_AT_use_UTF8";
13164 case DW_AT_extension
:
13165 return "DW_AT_extension";
13167 return "DW_AT_ranges";
13168 case DW_AT_trampoline
:
13169 return "DW_AT_trampoline";
13170 case DW_AT_call_column
:
13171 return "DW_AT_call_column";
13172 case DW_AT_call_file
:
13173 return "DW_AT_call_file";
13174 case DW_AT_call_line
:
13175 return "DW_AT_call_line";
13176 case DW_AT_description
:
13177 return "DW_AT_description";
13178 case DW_AT_binary_scale
:
13179 return "DW_AT_binary_scale";
13180 case DW_AT_decimal_scale
:
13181 return "DW_AT_decimal_scale";
13183 return "DW_AT_small";
13184 case DW_AT_decimal_sign
:
13185 return "DW_AT_decimal_sign";
13186 case DW_AT_digit_count
:
13187 return "DW_AT_digit_count";
13188 case DW_AT_picture_string
:
13189 return "DW_AT_picture_string";
13190 case DW_AT_mutable
:
13191 return "DW_AT_mutable";
13192 case DW_AT_threads_scaled
:
13193 return "DW_AT_threads_scaled";
13194 case DW_AT_explicit
:
13195 return "DW_AT_explicit";
13196 case DW_AT_object_pointer
:
13197 return "DW_AT_object_pointer";
13198 case DW_AT_endianity
:
13199 return "DW_AT_endianity";
13200 case DW_AT_elemental
:
13201 return "DW_AT_elemental";
13203 return "DW_AT_pure";
13204 case DW_AT_recursive
:
13205 return "DW_AT_recursive";
13206 /* DWARF 4 values. */
13207 case DW_AT_signature
:
13208 return "DW_AT_signature";
13209 case DW_AT_linkage_name
:
13210 return "DW_AT_linkage_name";
13211 /* SGI/MIPS extensions. */
13212 #ifdef MIPS /* collides with DW_AT_HP_block_index */
13213 case DW_AT_MIPS_fde
:
13214 return "DW_AT_MIPS_fde";
13216 case DW_AT_MIPS_loop_begin
:
13217 return "DW_AT_MIPS_loop_begin";
13218 case DW_AT_MIPS_tail_loop_begin
:
13219 return "DW_AT_MIPS_tail_loop_begin";
13220 case DW_AT_MIPS_epilog_begin
:
13221 return "DW_AT_MIPS_epilog_begin";
13222 case DW_AT_MIPS_loop_unroll_factor
:
13223 return "DW_AT_MIPS_loop_unroll_factor";
13224 case DW_AT_MIPS_software_pipeline_depth
:
13225 return "DW_AT_MIPS_software_pipeline_depth";
13226 case DW_AT_MIPS_linkage_name
:
13227 return "DW_AT_MIPS_linkage_name";
13228 case DW_AT_MIPS_stride
:
13229 return "DW_AT_MIPS_stride";
13230 case DW_AT_MIPS_abstract_name
:
13231 return "DW_AT_MIPS_abstract_name";
13232 case DW_AT_MIPS_clone_origin
:
13233 return "DW_AT_MIPS_clone_origin";
13234 case DW_AT_MIPS_has_inlines
:
13235 return "DW_AT_MIPS_has_inlines";
13236 /* HP extensions. */
13237 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
13238 case DW_AT_HP_block_index
:
13239 return "DW_AT_HP_block_index";
13241 case DW_AT_HP_unmodifiable
:
13242 return "DW_AT_HP_unmodifiable";
13243 case DW_AT_HP_actuals_stmt_list
:
13244 return "DW_AT_HP_actuals_stmt_list";
13245 case DW_AT_HP_proc_per_section
:
13246 return "DW_AT_HP_proc_per_section";
13247 case DW_AT_HP_raw_data_ptr
:
13248 return "DW_AT_HP_raw_data_ptr";
13249 case DW_AT_HP_pass_by_reference
:
13250 return "DW_AT_HP_pass_by_reference";
13251 case DW_AT_HP_opt_level
:
13252 return "DW_AT_HP_opt_level";
13253 case DW_AT_HP_prof_version_id
:
13254 return "DW_AT_HP_prof_version_id";
13255 case DW_AT_HP_opt_flags
:
13256 return "DW_AT_HP_opt_flags";
13257 case DW_AT_HP_cold_region_low_pc
:
13258 return "DW_AT_HP_cold_region_low_pc";
13259 case DW_AT_HP_cold_region_high_pc
:
13260 return "DW_AT_HP_cold_region_high_pc";
13261 case DW_AT_HP_all_variables_modifiable
:
13262 return "DW_AT_HP_all_variables_modifiable";
13263 case DW_AT_HP_linkage_name
:
13264 return "DW_AT_HP_linkage_name";
13265 case DW_AT_HP_prof_flags
:
13266 return "DW_AT_HP_prof_flags";
13267 /* GNU extensions. */
13268 case DW_AT_sf_names
:
13269 return "DW_AT_sf_names";
13270 case DW_AT_src_info
:
13271 return "DW_AT_src_info";
13272 case DW_AT_mac_info
:
13273 return "DW_AT_mac_info";
13274 case DW_AT_src_coords
:
13275 return "DW_AT_src_coords";
13276 case DW_AT_body_begin
:
13277 return "DW_AT_body_begin";
13278 case DW_AT_body_end
:
13279 return "DW_AT_body_end";
13280 case DW_AT_GNU_vector
:
13281 return "DW_AT_GNU_vector";
13282 case DW_AT_GNU_odr_signature
:
13283 return "DW_AT_GNU_odr_signature";
13284 /* VMS extensions. */
13285 case DW_AT_VMS_rtnbeg_pd_address
:
13286 return "DW_AT_VMS_rtnbeg_pd_address";
13287 /* UPC extension. */
13288 case DW_AT_upc_threads_scaled
:
13289 return "DW_AT_upc_threads_scaled";
13290 /* PGI (STMicroelectronics) extensions. */
13291 case DW_AT_PGI_lbase
:
13292 return "DW_AT_PGI_lbase";
13293 case DW_AT_PGI_soffset
:
13294 return "DW_AT_PGI_soffset";
13295 case DW_AT_PGI_lstride
:
13296 return "DW_AT_PGI_lstride";
13298 return "DW_AT_<unknown>";
13302 /* Convert a DWARF value form code into its string name. */
13305 dwarf_form_name (unsigned form
)
13310 return "DW_FORM_addr";
13311 case DW_FORM_block2
:
13312 return "DW_FORM_block2";
13313 case DW_FORM_block4
:
13314 return "DW_FORM_block4";
13315 case DW_FORM_data2
:
13316 return "DW_FORM_data2";
13317 case DW_FORM_data4
:
13318 return "DW_FORM_data4";
13319 case DW_FORM_data8
:
13320 return "DW_FORM_data8";
13321 case DW_FORM_string
:
13322 return "DW_FORM_string";
13323 case DW_FORM_block
:
13324 return "DW_FORM_block";
13325 case DW_FORM_block1
:
13326 return "DW_FORM_block1";
13327 case DW_FORM_data1
:
13328 return "DW_FORM_data1";
13330 return "DW_FORM_flag";
13331 case DW_FORM_sdata
:
13332 return "DW_FORM_sdata";
13334 return "DW_FORM_strp";
13335 case DW_FORM_udata
:
13336 return "DW_FORM_udata";
13337 case DW_FORM_ref_addr
:
13338 return "DW_FORM_ref_addr";
13340 return "DW_FORM_ref1";
13342 return "DW_FORM_ref2";
13344 return "DW_FORM_ref4";
13346 return "DW_FORM_ref8";
13347 case DW_FORM_ref_udata
:
13348 return "DW_FORM_ref_udata";
13349 case DW_FORM_indirect
:
13350 return "DW_FORM_indirect";
13351 case DW_FORM_sec_offset
:
13352 return "DW_FORM_sec_offset";
13353 case DW_FORM_exprloc
:
13354 return "DW_FORM_exprloc";
13355 case DW_FORM_flag_present
:
13356 return "DW_FORM_flag_present";
13357 case DW_FORM_ref_sig8
:
13358 return "DW_FORM_ref_sig8";
13360 return "DW_FORM_<unknown>";
13364 /* Convert a DWARF stack opcode into its string name. */
13367 dwarf_stack_op_name (unsigned op
)
13372 return "DW_OP_addr";
13374 return "DW_OP_deref";
13375 case DW_OP_const1u
:
13376 return "DW_OP_const1u";
13377 case DW_OP_const1s
:
13378 return "DW_OP_const1s";
13379 case DW_OP_const2u
:
13380 return "DW_OP_const2u";
13381 case DW_OP_const2s
:
13382 return "DW_OP_const2s";
13383 case DW_OP_const4u
:
13384 return "DW_OP_const4u";
13385 case DW_OP_const4s
:
13386 return "DW_OP_const4s";
13387 case DW_OP_const8u
:
13388 return "DW_OP_const8u";
13389 case DW_OP_const8s
:
13390 return "DW_OP_const8s";
13392 return "DW_OP_constu";
13394 return "DW_OP_consts";
13396 return "DW_OP_dup";
13398 return "DW_OP_drop";
13400 return "DW_OP_over";
13402 return "DW_OP_pick";
13404 return "DW_OP_swap";
13406 return "DW_OP_rot";
13408 return "DW_OP_xderef";
13410 return "DW_OP_abs";
13412 return "DW_OP_and";
13414 return "DW_OP_div";
13416 return "DW_OP_minus";
13418 return "DW_OP_mod";
13420 return "DW_OP_mul";
13422 return "DW_OP_neg";
13424 return "DW_OP_not";
13428 return "DW_OP_plus";
13429 case DW_OP_plus_uconst
:
13430 return "DW_OP_plus_uconst";
13432 return "DW_OP_shl";
13434 return "DW_OP_shr";
13436 return "DW_OP_shra";
13438 return "DW_OP_xor";
13440 return "DW_OP_bra";
13454 return "DW_OP_skip";
13456 return "DW_OP_lit0";
13458 return "DW_OP_lit1";
13460 return "DW_OP_lit2";
13462 return "DW_OP_lit3";
13464 return "DW_OP_lit4";
13466 return "DW_OP_lit5";
13468 return "DW_OP_lit6";
13470 return "DW_OP_lit7";
13472 return "DW_OP_lit8";
13474 return "DW_OP_lit9";
13476 return "DW_OP_lit10";
13478 return "DW_OP_lit11";
13480 return "DW_OP_lit12";
13482 return "DW_OP_lit13";
13484 return "DW_OP_lit14";
13486 return "DW_OP_lit15";
13488 return "DW_OP_lit16";
13490 return "DW_OP_lit17";
13492 return "DW_OP_lit18";
13494 return "DW_OP_lit19";
13496 return "DW_OP_lit20";
13498 return "DW_OP_lit21";
13500 return "DW_OP_lit22";
13502 return "DW_OP_lit23";
13504 return "DW_OP_lit24";
13506 return "DW_OP_lit25";
13508 return "DW_OP_lit26";
13510 return "DW_OP_lit27";
13512 return "DW_OP_lit28";
13514 return "DW_OP_lit29";
13516 return "DW_OP_lit30";
13518 return "DW_OP_lit31";
13520 return "DW_OP_reg0";
13522 return "DW_OP_reg1";
13524 return "DW_OP_reg2";
13526 return "DW_OP_reg3";
13528 return "DW_OP_reg4";
13530 return "DW_OP_reg5";
13532 return "DW_OP_reg6";
13534 return "DW_OP_reg7";
13536 return "DW_OP_reg8";
13538 return "DW_OP_reg9";
13540 return "DW_OP_reg10";
13542 return "DW_OP_reg11";
13544 return "DW_OP_reg12";
13546 return "DW_OP_reg13";
13548 return "DW_OP_reg14";
13550 return "DW_OP_reg15";
13552 return "DW_OP_reg16";
13554 return "DW_OP_reg17";
13556 return "DW_OP_reg18";
13558 return "DW_OP_reg19";
13560 return "DW_OP_reg20";
13562 return "DW_OP_reg21";
13564 return "DW_OP_reg22";
13566 return "DW_OP_reg23";
13568 return "DW_OP_reg24";
13570 return "DW_OP_reg25";
13572 return "DW_OP_reg26";
13574 return "DW_OP_reg27";
13576 return "DW_OP_reg28";
13578 return "DW_OP_reg29";
13580 return "DW_OP_reg30";
13582 return "DW_OP_reg31";
13584 return "DW_OP_breg0";
13586 return "DW_OP_breg1";
13588 return "DW_OP_breg2";
13590 return "DW_OP_breg3";
13592 return "DW_OP_breg4";
13594 return "DW_OP_breg5";
13596 return "DW_OP_breg6";
13598 return "DW_OP_breg7";
13600 return "DW_OP_breg8";
13602 return "DW_OP_breg9";
13604 return "DW_OP_breg10";
13606 return "DW_OP_breg11";
13608 return "DW_OP_breg12";
13610 return "DW_OP_breg13";
13612 return "DW_OP_breg14";
13614 return "DW_OP_breg15";
13616 return "DW_OP_breg16";
13618 return "DW_OP_breg17";
13620 return "DW_OP_breg18";
13622 return "DW_OP_breg19";
13624 return "DW_OP_breg20";
13626 return "DW_OP_breg21";
13628 return "DW_OP_breg22";
13630 return "DW_OP_breg23";
13632 return "DW_OP_breg24";
13634 return "DW_OP_breg25";
13636 return "DW_OP_breg26";
13638 return "DW_OP_breg27";
13640 return "DW_OP_breg28";
13642 return "DW_OP_breg29";
13644 return "DW_OP_breg30";
13646 return "DW_OP_breg31";
13648 return "DW_OP_regx";
13650 return "DW_OP_fbreg";
13652 return "DW_OP_bregx";
13654 return "DW_OP_piece";
13655 case DW_OP_deref_size
:
13656 return "DW_OP_deref_size";
13657 case DW_OP_xderef_size
:
13658 return "DW_OP_xderef_size";
13660 return "DW_OP_nop";
13661 /* DWARF 3 extensions. */
13662 case DW_OP_push_object_address
:
13663 return "DW_OP_push_object_address";
13665 return "DW_OP_call2";
13667 return "DW_OP_call4";
13668 case DW_OP_call_ref
:
13669 return "DW_OP_call_ref";
13670 case DW_OP_form_tls_address
:
13671 return "DW_OP_form_tls_address";
13672 case DW_OP_call_frame_cfa
:
13673 return "DW_OP_call_frame_cfa";
13674 case DW_OP_bit_piece
:
13675 return "DW_OP_bit_piece";
13676 /* DWARF 4 extensions. */
13677 case DW_OP_implicit_value
:
13678 return "DW_OP_implicit_value";
13679 case DW_OP_stack_value
:
13680 return "DW_OP_stack_value";
13681 /* GNU extensions. */
13682 case DW_OP_GNU_push_tls_address
:
13683 return "DW_OP_GNU_push_tls_address";
13684 case DW_OP_GNU_uninit
:
13685 return "DW_OP_GNU_uninit";
13686 case DW_OP_GNU_implicit_pointer
:
13687 return "DW_OP_GNU_implicit_pointer";
13688 case DW_OP_GNU_entry_value
:
13689 return "DW_OP_GNU_entry_value";
13690 case DW_OP_GNU_const_type
:
13691 return "DW_OP_GNU_const_type";
13692 case DW_OP_GNU_regval_type
:
13693 return "DW_OP_GNU_regval_type";
13694 case DW_OP_GNU_deref_type
:
13695 return "DW_OP_GNU_deref_type";
13696 case DW_OP_GNU_convert
:
13697 return "DW_OP_GNU_convert";
13698 case DW_OP_GNU_reinterpret
:
13699 return "DW_OP_GNU_reinterpret";
13706 dwarf_bool_name (unsigned mybool
)
13714 /* Convert a DWARF type code into its string name. */
13717 dwarf_type_encoding_name (unsigned enc
)
13722 return "DW_ATE_void";
13723 case DW_ATE_address
:
13724 return "DW_ATE_address";
13725 case DW_ATE_boolean
:
13726 return "DW_ATE_boolean";
13727 case DW_ATE_complex_float
:
13728 return "DW_ATE_complex_float";
13730 return "DW_ATE_float";
13731 case DW_ATE_signed
:
13732 return "DW_ATE_signed";
13733 case DW_ATE_signed_char
:
13734 return "DW_ATE_signed_char";
13735 case DW_ATE_unsigned
:
13736 return "DW_ATE_unsigned";
13737 case DW_ATE_unsigned_char
:
13738 return "DW_ATE_unsigned_char";
13740 case DW_ATE_imaginary_float
:
13741 return "DW_ATE_imaginary_float";
13742 case DW_ATE_packed_decimal
:
13743 return "DW_ATE_packed_decimal";
13744 case DW_ATE_numeric_string
:
13745 return "DW_ATE_numeric_string";
13746 case DW_ATE_edited
:
13747 return "DW_ATE_edited";
13748 case DW_ATE_signed_fixed
:
13749 return "DW_ATE_signed_fixed";
13750 case DW_ATE_unsigned_fixed
:
13751 return "DW_ATE_unsigned_fixed";
13752 case DW_ATE_decimal_float
:
13753 return "DW_ATE_decimal_float";
13756 return "DW_ATE_UTF";
13757 /* HP extensions. */
13758 case DW_ATE_HP_float80
:
13759 return "DW_ATE_HP_float80";
13760 case DW_ATE_HP_complex_float80
:
13761 return "DW_ATE_HP_complex_float80";
13762 case DW_ATE_HP_float128
:
13763 return "DW_ATE_HP_float128";
13764 case DW_ATE_HP_complex_float128
:
13765 return "DW_ATE_HP_complex_float128";
13766 case DW_ATE_HP_floathpintel
:
13767 return "DW_ATE_HP_floathpintel";
13768 case DW_ATE_HP_imaginary_float80
:
13769 return "DW_ATE_HP_imaginary_float80";
13770 case DW_ATE_HP_imaginary_float128
:
13771 return "DW_ATE_HP_imaginary_float128";
13773 return "DW_ATE_<unknown>";
13777 /* Convert a DWARF call frame info operation to its string name. */
13781 dwarf_cfi_name (unsigned cfi_opc
)
13785 case DW_CFA_advance_loc
:
13786 return "DW_CFA_advance_loc";
13787 case DW_CFA_offset
:
13788 return "DW_CFA_offset";
13789 case DW_CFA_restore
:
13790 return "DW_CFA_restore";
13792 return "DW_CFA_nop";
13793 case DW_CFA_set_loc
:
13794 return "DW_CFA_set_loc";
13795 case DW_CFA_advance_loc1
:
13796 return "DW_CFA_advance_loc1";
13797 case DW_CFA_advance_loc2
:
13798 return "DW_CFA_advance_loc2";
13799 case DW_CFA_advance_loc4
:
13800 return "DW_CFA_advance_loc4";
13801 case DW_CFA_offset_extended
:
13802 return "DW_CFA_offset_extended";
13803 case DW_CFA_restore_extended
:
13804 return "DW_CFA_restore_extended";
13805 case DW_CFA_undefined
:
13806 return "DW_CFA_undefined";
13807 case DW_CFA_same_value
:
13808 return "DW_CFA_same_value";
13809 case DW_CFA_register
:
13810 return "DW_CFA_register";
13811 case DW_CFA_remember_state
:
13812 return "DW_CFA_remember_state";
13813 case DW_CFA_restore_state
:
13814 return "DW_CFA_restore_state";
13815 case DW_CFA_def_cfa
:
13816 return "DW_CFA_def_cfa";
13817 case DW_CFA_def_cfa_register
:
13818 return "DW_CFA_def_cfa_register";
13819 case DW_CFA_def_cfa_offset
:
13820 return "DW_CFA_def_cfa_offset";
13822 case DW_CFA_def_cfa_expression
:
13823 return "DW_CFA_def_cfa_expression";
13824 case DW_CFA_expression
:
13825 return "DW_CFA_expression";
13826 case DW_CFA_offset_extended_sf
:
13827 return "DW_CFA_offset_extended_sf";
13828 case DW_CFA_def_cfa_sf
:
13829 return "DW_CFA_def_cfa_sf";
13830 case DW_CFA_def_cfa_offset_sf
:
13831 return "DW_CFA_def_cfa_offset_sf";
13832 case DW_CFA_val_offset
:
13833 return "DW_CFA_val_offset";
13834 case DW_CFA_val_offset_sf
:
13835 return "DW_CFA_val_offset_sf";
13836 case DW_CFA_val_expression
:
13837 return "DW_CFA_val_expression";
13838 /* SGI/MIPS specific. */
13839 case DW_CFA_MIPS_advance_loc8
:
13840 return "DW_CFA_MIPS_advance_loc8";
13841 /* GNU extensions. */
13842 case DW_CFA_GNU_window_save
:
13843 return "DW_CFA_GNU_window_save";
13844 case DW_CFA_GNU_args_size
:
13845 return "DW_CFA_GNU_args_size";
13846 case DW_CFA_GNU_negative_offset_extended
:
13847 return "DW_CFA_GNU_negative_offset_extended";
13849 return "DW_CFA_<unknown>";
13855 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
13859 print_spaces (indent
, f
);
13860 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
13861 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
13863 if (die
->parent
!= NULL
)
13865 print_spaces (indent
, f
);
13866 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
13867 die
->parent
->offset
);
13870 print_spaces (indent
, f
);
13871 fprintf_unfiltered (f
, " has children: %s\n",
13872 dwarf_bool_name (die
->child
!= NULL
));
13874 print_spaces (indent
, f
);
13875 fprintf_unfiltered (f
, " attributes:\n");
13877 for (i
= 0; i
< die
->num_attrs
; ++i
)
13879 print_spaces (indent
, f
);
13880 fprintf_unfiltered (f
, " %s (%s) ",
13881 dwarf_attr_name (die
->attrs
[i
].name
),
13882 dwarf_form_name (die
->attrs
[i
].form
));
13884 switch (die
->attrs
[i
].form
)
13886 case DW_FORM_ref_addr
:
13888 fprintf_unfiltered (f
, "address: ");
13889 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
13891 case DW_FORM_block2
:
13892 case DW_FORM_block4
:
13893 case DW_FORM_block
:
13894 case DW_FORM_block1
:
13895 fprintf_unfiltered (f
, "block: size %d",
13896 DW_BLOCK (&die
->attrs
[i
])->size
);
13898 case DW_FORM_exprloc
:
13899 fprintf_unfiltered (f
, "expression: size %u",
13900 DW_BLOCK (&die
->attrs
[i
])->size
);
13905 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
13906 (long) (DW_ADDR (&die
->attrs
[i
])));
13908 case DW_FORM_data1
:
13909 case DW_FORM_data2
:
13910 case DW_FORM_data4
:
13911 case DW_FORM_data8
:
13912 case DW_FORM_udata
:
13913 case DW_FORM_sdata
:
13914 fprintf_unfiltered (f
, "constant: %s",
13915 pulongest (DW_UNSND (&die
->attrs
[i
])));
13917 case DW_FORM_sec_offset
:
13918 fprintf_unfiltered (f
, "section offset: %s",
13919 pulongest (DW_UNSND (&die
->attrs
[i
])));
13921 case DW_FORM_ref_sig8
:
13922 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
13923 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
13924 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->per_cu
.offset
);
13926 fprintf_unfiltered (f
, "signatured type, offset: unknown");
13928 case DW_FORM_string
:
13930 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
13931 DW_STRING (&die
->attrs
[i
])
13932 ? DW_STRING (&die
->attrs
[i
]) : "",
13933 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
13936 if (DW_UNSND (&die
->attrs
[i
]))
13937 fprintf_unfiltered (f
, "flag: TRUE");
13939 fprintf_unfiltered (f
, "flag: FALSE");
13941 case DW_FORM_flag_present
:
13942 fprintf_unfiltered (f
, "flag: TRUE");
13944 case DW_FORM_indirect
:
13945 /* The reader will have reduced the indirect form to
13946 the "base form" so this form should not occur. */
13947 fprintf_unfiltered (f
,
13948 "unexpected attribute form: DW_FORM_indirect");
13951 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
13952 die
->attrs
[i
].form
);
13955 fprintf_unfiltered (f
, "\n");
13960 dump_die_for_error (struct die_info
*die
)
13962 dump_die_shallow (gdb_stderr
, 0, die
);
13966 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
13968 int indent
= level
* 4;
13970 gdb_assert (die
!= NULL
);
13972 if (level
>= max_level
)
13975 dump_die_shallow (f
, indent
, die
);
13977 if (die
->child
!= NULL
)
13979 print_spaces (indent
, f
);
13980 fprintf_unfiltered (f
, " Children:");
13981 if (level
+ 1 < max_level
)
13983 fprintf_unfiltered (f
, "\n");
13984 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
13988 fprintf_unfiltered (f
,
13989 " [not printed, max nesting level reached]\n");
13993 if (die
->sibling
!= NULL
&& level
> 0)
13995 dump_die_1 (f
, level
, max_level
, die
->sibling
);
13999 /* This is called from the pdie macro in gdbinit.in.
14000 It's not static so gcc will keep a copy callable from gdb. */
14003 dump_die (struct die_info
*die
, int max_level
)
14005 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
14009 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
14013 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
14019 is_ref_attr (struct attribute
*attr
)
14021 switch (attr
->form
)
14023 case DW_FORM_ref_addr
:
14028 case DW_FORM_ref_udata
:
14035 static unsigned int
14036 dwarf2_get_ref_die_offset (struct attribute
*attr
)
14038 if (is_ref_attr (attr
))
14039 return DW_ADDR (attr
);
14041 complaint (&symfile_complaints
,
14042 _("unsupported die ref attribute form: '%s'"),
14043 dwarf_form_name (attr
->form
));
14047 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
14048 * the value held by the attribute is not constant. */
14051 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
14053 if (attr
->form
== DW_FORM_sdata
)
14054 return DW_SND (attr
);
14055 else if (attr
->form
== DW_FORM_udata
14056 || attr
->form
== DW_FORM_data1
14057 || attr
->form
== DW_FORM_data2
14058 || attr
->form
== DW_FORM_data4
14059 || attr
->form
== DW_FORM_data8
)
14060 return DW_UNSND (attr
);
14063 complaint (&symfile_complaints
,
14064 _("Attribute value is not a constant (%s)"),
14065 dwarf_form_name (attr
->form
));
14066 return default_value
;
14070 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
14071 unit and add it to our queue.
14072 The result is non-zero if PER_CU was queued, otherwise the result is zero
14073 meaning either PER_CU is already queued or it is already loaded. */
14076 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
14077 struct dwarf2_per_cu_data
*per_cu
)
14079 /* We may arrive here during partial symbol reading, if we need full
14080 DIEs to process an unusual case (e.g. template arguments). Do
14081 not queue PER_CU, just tell our caller to load its DIEs. */
14082 if (dwarf2_per_objfile
->reading_partial_symbols
)
14084 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
14089 /* Mark the dependence relation so that we don't flush PER_CU
14091 dwarf2_add_dependence (this_cu
, per_cu
);
14093 /* If it's already on the queue, we have nothing to do. */
14094 if (per_cu
->queued
)
14097 /* If the compilation unit is already loaded, just mark it as
14099 if (per_cu
->cu
!= NULL
)
14101 per_cu
->cu
->last_used
= 0;
14105 /* Add it to the queue. */
14106 queue_comp_unit (per_cu
);
14111 /* Follow reference or signature attribute ATTR of SRC_DIE.
14112 On entry *REF_CU is the CU of SRC_DIE.
14113 On exit *REF_CU is the CU of the result. */
14115 static struct die_info
*
14116 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
14117 struct dwarf2_cu
**ref_cu
)
14119 struct die_info
*die
;
14121 if (is_ref_attr (attr
))
14122 die
= follow_die_ref (src_die
, attr
, ref_cu
);
14123 else if (attr
->form
== DW_FORM_ref_sig8
)
14124 die
= follow_die_sig (src_die
, attr
, ref_cu
);
14127 dump_die_for_error (src_die
);
14128 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
14129 (*ref_cu
)->objfile
->name
);
14135 /* Follow reference OFFSET.
14136 On entry *REF_CU is the CU of the source die referencing OFFSET.
14137 On exit *REF_CU is the CU of the result.
14138 Returns NULL if OFFSET is invalid. */
14140 static struct die_info
*
14141 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
14143 struct die_info temp_die
;
14144 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
14146 gdb_assert (cu
->per_cu
!= NULL
);
14150 if (cu
->per_cu
->debug_types_section
)
14152 /* .debug_types CUs cannot reference anything outside their CU.
14153 If they need to, they have to reference a signatured type via
14154 DW_FORM_ref_sig8. */
14155 if (! offset_in_cu_p (&cu
->header
, offset
))
14158 else if (! offset_in_cu_p (&cu
->header
, offset
))
14160 struct dwarf2_per_cu_data
*per_cu
;
14162 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
14164 /* If necessary, add it to the queue and load its DIEs. */
14165 if (maybe_queue_comp_unit (cu
, per_cu
))
14166 load_full_comp_unit (per_cu
);
14168 target_cu
= per_cu
->cu
;
14170 else if (cu
->dies
== NULL
)
14172 /* We're loading full DIEs during partial symbol reading. */
14173 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
14174 load_full_comp_unit (cu
->per_cu
);
14177 *ref_cu
= target_cu
;
14178 temp_die
.offset
= offset
;
14179 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
14182 /* Follow reference attribute ATTR of SRC_DIE.
14183 On entry *REF_CU is the CU of SRC_DIE.
14184 On exit *REF_CU is the CU of the result. */
14186 static struct die_info
*
14187 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
14188 struct dwarf2_cu
**ref_cu
)
14190 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
14191 struct dwarf2_cu
*cu
= *ref_cu
;
14192 struct die_info
*die
;
14194 die
= follow_die_offset (offset
, ref_cu
);
14196 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
14197 "at 0x%x [in module %s]"),
14198 offset
, src_die
->offset
, cu
->objfile
->name
);
14203 /* Return DWARF block referenced by DW_AT_location of DIE at OFFSET at PER_CU.
14204 Returned value is intended for DW_OP_call*. Returned
14205 dwarf2_locexpr_baton->data has lifetime of PER_CU->OBJFILE. */
14207 struct dwarf2_locexpr_baton
14208 dwarf2_fetch_die_location_block (unsigned int offset_in_cu
,
14209 struct dwarf2_per_cu_data
*per_cu
,
14210 CORE_ADDR (*get_frame_pc
) (void *baton
),
14213 unsigned int offset
= per_cu
->offset
+ offset_in_cu
;
14214 struct dwarf2_cu
*cu
;
14215 struct die_info
*die
;
14216 struct attribute
*attr
;
14217 struct dwarf2_locexpr_baton retval
;
14219 dw2_setup (per_cu
->objfile
);
14221 if (per_cu
->cu
== NULL
)
14225 die
= follow_die_offset (offset
, &cu
);
14227 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
14228 offset
, per_cu
->objfile
->name
);
14230 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
14233 /* DWARF: "If there is no such attribute, then there is no effect.".
14234 DATA is ignored if SIZE is 0. */
14236 retval
.data
= NULL
;
14239 else if (attr_form_is_section_offset (attr
))
14241 struct dwarf2_loclist_baton loclist_baton
;
14242 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
14245 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
14247 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
14249 retval
.size
= size
;
14253 if (!attr_form_is_block (attr
))
14254 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
14255 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
14256 offset
, per_cu
->objfile
->name
);
14258 retval
.data
= DW_BLOCK (attr
)->data
;
14259 retval
.size
= DW_BLOCK (attr
)->size
;
14261 retval
.per_cu
= cu
->per_cu
;
14263 age_cached_comp_units ();
14268 /* Return the type of the DIE at DIE_OFFSET in the CU named by
14272 dwarf2_get_die_type (unsigned int die_offset
,
14273 struct dwarf2_per_cu_data
*per_cu
)
14275 dw2_setup (per_cu
->objfile
);
14276 return get_die_type_at_offset (per_cu
->offset
+ die_offset
, per_cu
);
14279 /* Follow the signature attribute ATTR in SRC_DIE.
14280 On entry *REF_CU is the CU of SRC_DIE.
14281 On exit *REF_CU is the CU of the result. */
14283 static struct die_info
*
14284 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
14285 struct dwarf2_cu
**ref_cu
)
14287 struct objfile
*objfile
= (*ref_cu
)->objfile
;
14288 struct die_info temp_die
;
14289 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
14290 struct dwarf2_cu
*sig_cu
;
14291 struct die_info
*die
;
14293 /* sig_type will be NULL if the signatured type is missing from
14295 if (sig_type
== NULL
)
14296 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
14297 "at 0x%x [in module %s]"),
14298 src_die
->offset
, objfile
->name
);
14300 /* If necessary, add it to the queue and load its DIEs. */
14302 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
14303 read_signatured_type (sig_type
);
14305 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
14307 sig_cu
= sig_type
->per_cu
.cu
;
14308 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
14309 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
14316 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced "
14317 "from DIE at 0x%x [in module %s]"),
14318 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
14321 /* Given an offset of a signatured type, return its signatured_type. */
14323 static struct signatured_type
*
14324 lookup_signatured_type_at_offset (struct objfile
*objfile
,
14325 struct dwarf2_section_info
*section
,
14326 unsigned int offset
)
14328 gdb_byte
*info_ptr
= section
->buffer
+ offset
;
14329 unsigned int length
, initial_length_size
;
14330 unsigned int sig_offset
;
14331 struct signatured_type find_entry
, *type_sig
;
14333 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
14334 sig_offset
= (initial_length_size
14336 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
14337 + 1 /*address_size*/);
14338 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
14339 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
14341 /* This is only used to lookup previously recorded types.
14342 If we didn't find it, it's our bug. */
14343 gdb_assert (type_sig
!= NULL
);
14344 gdb_assert (offset
== type_sig
->per_cu
.offset
);
14349 /* Load the DIEs associated with type unit PER_CU into memory. */
14352 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
14354 struct objfile
*objfile
= per_cu
->objfile
;
14355 struct dwarf2_section_info
*sect
= per_cu
->debug_types_section
;
14356 unsigned int offset
= per_cu
->offset
;
14357 struct signatured_type
*type_sig
;
14359 dwarf2_read_section (objfile
, sect
);
14361 /* We have the section offset, but we need the signature to do the
14362 hash table lookup. */
14363 /* FIXME: This is sorta unnecessary, read_signatured_type only uses
14364 the signature to assert we found the right one.
14365 Ok, but it's a lot of work. We should simplify things so any needed
14366 assert doesn't require all this clumsiness. */
14367 type_sig
= lookup_signatured_type_at_offset (objfile
, sect
, offset
);
14369 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
14371 read_signatured_type (type_sig
);
14373 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
14376 /* Read in a signatured type and build its CU and DIEs. */
14379 read_signatured_type (struct signatured_type
*type_sig
)
14381 struct objfile
*objfile
= type_sig
->per_cu
.objfile
;
14382 gdb_byte
*types_ptr
;
14383 struct die_reader_specs reader_specs
;
14384 struct dwarf2_cu
*cu
;
14385 ULONGEST signature
;
14386 struct cleanup
*back_to
, *free_cu_cleanup
;
14387 struct dwarf2_section_info
*section
= type_sig
->per_cu
.debug_types_section
;
14389 dwarf2_read_section (objfile
, section
);
14390 types_ptr
= section
->buffer
+ type_sig
->per_cu
.offset
;
14392 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
14394 cu
= xmalloc (sizeof (*cu
));
14395 init_one_comp_unit (cu
, &type_sig
->per_cu
);
14397 /* If an error occurs while loading, release our storage. */
14398 free_cu_cleanup
= make_cleanup (free_heap_comp_unit
, cu
);
14400 types_ptr
= read_and_check_type_unit_head (&cu
->header
, section
, types_ptr
,
14402 gdb_assert (signature
== type_sig
->signature
);
14405 = htab_create_alloc_ex (cu
->header
.length
/ 12,
14409 &cu
->comp_unit_obstack
,
14410 hashtab_obstack_allocate
,
14411 dummy_obstack_deallocate
);
14413 dwarf2_read_abbrevs (cu
);
14414 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
14416 init_cu_die_reader (&reader_specs
, cu
);
14418 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
14421 /* We try not to read any attributes in this function, because not
14422 all CUs needed for references have been loaded yet, and symbol
14423 table processing isn't initialized. But we have to set the CU language,
14424 or we won't be able to build types correctly. */
14425 prepare_one_comp_unit (cu
, cu
->dies
);
14427 do_cleanups (back_to
);
14429 /* We've successfully allocated this compilation unit. Let our caller
14430 clean it up when finished with it. */
14431 discard_cleanups (free_cu_cleanup
);
14433 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
14434 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
14437 /* Decode simple location descriptions.
14438 Given a pointer to a dwarf block that defines a location, compute
14439 the location and return the value.
14441 NOTE drow/2003-11-18: This function is called in two situations
14442 now: for the address of static or global variables (partial symbols
14443 only) and for offsets into structures which are expected to be
14444 (more or less) constant. The partial symbol case should go away,
14445 and only the constant case should remain. That will let this
14446 function complain more accurately. A few special modes are allowed
14447 without complaint for global variables (for instance, global
14448 register values and thread-local values).
14450 A location description containing no operations indicates that the
14451 object is optimized out. The return value is 0 for that case.
14452 FIXME drow/2003-11-16: No callers check for this case any more; soon all
14453 callers will only want a very basic result and this can become a
14456 Note that stack[0] is unused except as a default error return. */
14459 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
14461 struct objfile
*objfile
= cu
->objfile
;
14463 int size
= blk
->size
;
14464 gdb_byte
*data
= blk
->data
;
14465 CORE_ADDR stack
[64];
14467 unsigned int bytes_read
, unsnd
;
14473 stack
[++stacki
] = 0;
14512 stack
[++stacki
] = op
- DW_OP_lit0
;
14547 stack
[++stacki
] = op
- DW_OP_reg0
;
14549 dwarf2_complex_location_expr_complaint ();
14553 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
14555 stack
[++stacki
] = unsnd
;
14557 dwarf2_complex_location_expr_complaint ();
14561 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
14566 case DW_OP_const1u
:
14567 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
14571 case DW_OP_const1s
:
14572 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
14576 case DW_OP_const2u
:
14577 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
14581 case DW_OP_const2s
:
14582 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
14586 case DW_OP_const4u
:
14587 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
14591 case DW_OP_const4s
:
14592 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
14596 case DW_OP_const8u
:
14597 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
14602 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
14608 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
14613 stack
[stacki
+ 1] = stack
[stacki
];
14618 stack
[stacki
- 1] += stack
[stacki
];
14622 case DW_OP_plus_uconst
:
14623 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
14629 stack
[stacki
- 1] -= stack
[stacki
];
14634 /* If we're not the last op, then we definitely can't encode
14635 this using GDB's address_class enum. This is valid for partial
14636 global symbols, although the variable's address will be bogus
14639 dwarf2_complex_location_expr_complaint ();
14642 case DW_OP_GNU_push_tls_address
:
14643 /* The top of the stack has the offset from the beginning
14644 of the thread control block at which the variable is located. */
14645 /* Nothing should follow this operator, so the top of stack would
14647 /* This is valid for partial global symbols, but the variable's
14648 address will be bogus in the psymtab. Make it always at least
14649 non-zero to not look as a variable garbage collected by linker
14650 which have DW_OP_addr 0. */
14652 dwarf2_complex_location_expr_complaint ();
14656 case DW_OP_GNU_uninit
:
14661 const char *name
= dwarf_stack_op_name (op
);
14664 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
14667 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
14671 return (stack
[stacki
]);
14674 /* Enforce maximum stack depth of SIZE-1 to avoid writing
14675 outside of the allocated space. Also enforce minimum>0. */
14676 if (stacki
>= ARRAY_SIZE (stack
) - 1)
14678 complaint (&symfile_complaints
,
14679 _("location description stack overflow"));
14685 complaint (&symfile_complaints
,
14686 _("location description stack underflow"));
14690 return (stack
[stacki
]);
14693 /* memory allocation interface */
14695 static struct dwarf_block
*
14696 dwarf_alloc_block (struct dwarf2_cu
*cu
)
14698 struct dwarf_block
*blk
;
14700 blk
= (struct dwarf_block
*)
14701 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
14705 static struct abbrev_info
*
14706 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
14708 struct abbrev_info
*abbrev
;
14710 abbrev
= (struct abbrev_info
*)
14711 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
14712 memset (abbrev
, 0, sizeof (struct abbrev_info
));
14716 static struct die_info
*
14717 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
14719 struct die_info
*die
;
14720 size_t size
= sizeof (struct die_info
);
14723 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
14725 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
14726 memset (die
, 0, sizeof (struct die_info
));
14731 /* Macro support. */
14733 /* Return the full name of file number I in *LH's file name table.
14734 Use COMP_DIR as the name of the current directory of the
14735 compilation. The result is allocated using xmalloc; the caller is
14736 responsible for freeing it. */
14738 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
14740 /* Is the file number a valid index into the line header's file name
14741 table? Remember that file numbers start with one, not zero. */
14742 if (1 <= file
&& file
<= lh
->num_file_names
)
14744 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
14746 if (IS_ABSOLUTE_PATH (fe
->name
))
14747 return xstrdup (fe
->name
);
14755 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
14761 dir_len
= strlen (dir
);
14762 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
14763 strcpy (full_name
, dir
);
14764 full_name
[dir_len
] = '/';
14765 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
14769 return xstrdup (fe
->name
);
14774 /* The compiler produced a bogus file number. We can at least
14775 record the macro definitions made in the file, even if we
14776 won't be able to find the file by name. */
14777 char fake_name
[80];
14779 sprintf (fake_name
, "<bad macro file number %d>", file
);
14781 complaint (&symfile_complaints
,
14782 _("bad file number in macro information (%d)"),
14785 return xstrdup (fake_name
);
14790 static struct macro_source_file
*
14791 macro_start_file (int file
, int line
,
14792 struct macro_source_file
*current_file
,
14793 const char *comp_dir
,
14794 struct line_header
*lh
, struct objfile
*objfile
)
14796 /* The full name of this source file. */
14797 char *full_name
= file_full_name (file
, lh
, comp_dir
);
14799 /* We don't create a macro table for this compilation unit
14800 at all until we actually get a filename. */
14801 if (! pending_macros
)
14802 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
14803 objfile
->macro_cache
);
14805 if (! current_file
)
14806 /* If we have no current file, then this must be the start_file
14807 directive for the compilation unit's main source file. */
14808 current_file
= macro_set_main (pending_macros
, full_name
);
14810 current_file
= macro_include (current_file
, line
, full_name
);
14814 return current_file
;
14818 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
14819 followed by a null byte. */
14821 copy_string (const char *buf
, int len
)
14823 char *s
= xmalloc (len
+ 1);
14825 memcpy (s
, buf
, len
);
14831 static const char *
14832 consume_improper_spaces (const char *p
, const char *body
)
14836 complaint (&symfile_complaints
,
14837 _("macro definition contains spaces "
14838 "in formal argument list:\n`%s'"),
14850 parse_macro_definition (struct macro_source_file
*file
, int line
,
14855 /* The body string takes one of two forms. For object-like macro
14856 definitions, it should be:
14858 <macro name> " " <definition>
14860 For function-like macro definitions, it should be:
14862 <macro name> "() " <definition>
14864 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
14866 Spaces may appear only where explicitly indicated, and in the
14869 The Dwarf 2 spec says that an object-like macro's name is always
14870 followed by a space, but versions of GCC around March 2002 omit
14871 the space when the macro's definition is the empty string.
14873 The Dwarf 2 spec says that there should be no spaces between the
14874 formal arguments in a function-like macro's formal argument list,
14875 but versions of GCC around March 2002 include spaces after the
14879 /* Find the extent of the macro name. The macro name is terminated
14880 by either a space or null character (for an object-like macro) or
14881 an opening paren (for a function-like macro). */
14882 for (p
= body
; *p
; p
++)
14883 if (*p
== ' ' || *p
== '(')
14886 if (*p
== ' ' || *p
== '\0')
14888 /* It's an object-like macro. */
14889 int name_len
= p
- body
;
14890 char *name
= copy_string (body
, name_len
);
14891 const char *replacement
;
14894 replacement
= body
+ name_len
+ 1;
14897 dwarf2_macro_malformed_definition_complaint (body
);
14898 replacement
= body
+ name_len
;
14901 macro_define_object (file
, line
, name
, replacement
);
14905 else if (*p
== '(')
14907 /* It's a function-like macro. */
14908 char *name
= copy_string (body
, p
- body
);
14911 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
14915 p
= consume_improper_spaces (p
, body
);
14917 /* Parse the formal argument list. */
14918 while (*p
&& *p
!= ')')
14920 /* Find the extent of the current argument name. */
14921 const char *arg_start
= p
;
14923 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
14926 if (! *p
|| p
== arg_start
)
14927 dwarf2_macro_malformed_definition_complaint (body
);
14930 /* Make sure argv has room for the new argument. */
14931 if (argc
>= argv_size
)
14934 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
14937 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
14940 p
= consume_improper_spaces (p
, body
);
14942 /* Consume the comma, if present. */
14947 p
= consume_improper_spaces (p
, body
);
14956 /* Perfectly formed definition, no complaints. */
14957 macro_define_function (file
, line
, name
,
14958 argc
, (const char **) argv
,
14960 else if (*p
== '\0')
14962 /* Complain, but do define it. */
14963 dwarf2_macro_malformed_definition_complaint (body
);
14964 macro_define_function (file
, line
, name
,
14965 argc
, (const char **) argv
,
14969 /* Just complain. */
14970 dwarf2_macro_malformed_definition_complaint (body
);
14973 /* Just complain. */
14974 dwarf2_macro_malformed_definition_complaint (body
);
14980 for (i
= 0; i
< argc
; i
++)
14986 dwarf2_macro_malformed_definition_complaint (body
);
14989 /* Skip some bytes from BYTES according to the form given in FORM.
14990 Returns the new pointer. */
14993 skip_form_bytes (bfd
*abfd
, gdb_byte
*bytes
,
14994 enum dwarf_form form
,
14995 unsigned int offset_size
,
14996 struct dwarf2_section_info
*section
)
14998 unsigned int bytes_read
;
15002 case DW_FORM_data1
:
15007 case DW_FORM_data2
:
15011 case DW_FORM_data4
:
15015 case DW_FORM_data8
:
15019 case DW_FORM_string
:
15020 read_direct_string (abfd
, bytes
, &bytes_read
);
15021 bytes
+= bytes_read
;
15024 case DW_FORM_sec_offset
:
15026 bytes
+= offset_size
;
15029 case DW_FORM_block
:
15030 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
15031 bytes
+= bytes_read
;
15034 case DW_FORM_block1
:
15035 bytes
+= 1 + read_1_byte (abfd
, bytes
);
15037 case DW_FORM_block2
:
15038 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
15040 case DW_FORM_block4
:
15041 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
15044 case DW_FORM_sdata
:
15045 case DW_FORM_udata
:
15046 bytes
= skip_leb128 (abfd
, bytes
);
15052 complaint (&symfile_complaints
,
15053 _("invalid form 0x%x in `%s'"),
15055 section
->asection
->name
);
15063 /* A helper for dwarf_decode_macros that handles skipping an unknown
15064 opcode. Returns an updated pointer to the macro data buffer; or,
15065 on error, issues a complaint and returns NULL. */
15068 skip_unknown_opcode (unsigned int opcode
,
15069 gdb_byte
**opcode_definitions
,
15072 unsigned int offset_size
,
15073 struct dwarf2_section_info
*section
)
15075 unsigned int bytes_read
, i
;
15079 if (opcode_definitions
[opcode
] == NULL
)
15081 complaint (&symfile_complaints
,
15082 _("unrecognized DW_MACFINO opcode 0x%x"),
15087 defn
= opcode_definitions
[opcode
];
15088 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
15089 defn
+= bytes_read
;
15091 for (i
= 0; i
< arg
; ++i
)
15093 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, defn
[i
], offset_size
, section
);
15094 if (mac_ptr
== NULL
)
15096 /* skip_form_bytes already issued the complaint. */
15104 /* A helper function which parses the header of a macro section.
15105 If the macro section is the extended (for now called "GNU") type,
15106 then this updates *OFFSET_SIZE. Returns a pointer to just after
15107 the header, or issues a complaint and returns NULL on error. */
15110 dwarf_parse_macro_header (gdb_byte
**opcode_definitions
,
15113 unsigned int *offset_size
,
15114 int section_is_gnu
)
15116 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
15118 if (section_is_gnu
)
15120 unsigned int version
, flags
;
15122 version
= read_2_bytes (abfd
, mac_ptr
);
15125 complaint (&symfile_complaints
,
15126 _("unrecognized version `%d' in .debug_macro section"),
15132 flags
= read_1_byte (abfd
, mac_ptr
);
15134 *offset_size
= (flags
& 1) ? 8 : 4;
15136 if ((flags
& 2) != 0)
15137 /* We don't need the line table offset. */
15138 mac_ptr
+= *offset_size
;
15140 /* Vendor opcode descriptions. */
15141 if ((flags
& 4) != 0)
15143 unsigned int i
, count
;
15145 count
= read_1_byte (abfd
, mac_ptr
);
15147 for (i
= 0; i
< count
; ++i
)
15149 unsigned int opcode
, bytes_read
;
15152 opcode
= read_1_byte (abfd
, mac_ptr
);
15154 opcode_definitions
[opcode
] = mac_ptr
;
15155 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15156 mac_ptr
+= bytes_read
;
15165 /* A helper for dwarf_decode_macros that handles the GNU extensions,
15166 including DW_MACRO_GNU_transparent_include. */
15169 dwarf_decode_macro_bytes (bfd
*abfd
, gdb_byte
*mac_ptr
, gdb_byte
*mac_end
,
15170 struct macro_source_file
*current_file
,
15171 struct line_header
*lh
, char *comp_dir
,
15172 struct dwarf2_section_info
*section
,
15173 int section_is_gnu
,
15174 unsigned int offset_size
,
15175 struct objfile
*objfile
,
15176 htab_t include_hash
)
15178 enum dwarf_macro_record_type macinfo_type
;
15179 int at_commandline
;
15180 gdb_byte
*opcode_definitions
[256];
15182 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
15183 &offset_size
, section_is_gnu
);
15184 if (mac_ptr
== NULL
)
15186 /* We already issued a complaint. */
15190 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
15191 GDB is still reading the definitions from command line. First
15192 DW_MACINFO_start_file will need to be ignored as it was already executed
15193 to create CURRENT_FILE for the main source holding also the command line
15194 definitions. On first met DW_MACINFO_start_file this flag is reset to
15195 normally execute all the remaining DW_MACINFO_start_file macinfos. */
15197 at_commandline
= 1;
15201 /* Do we at least have room for a macinfo type byte? */
15202 if (mac_ptr
>= mac_end
)
15204 dwarf2_macros_too_long_complaint (section
);
15208 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
15211 /* Note that we rely on the fact that the corresponding GNU and
15212 DWARF constants are the same. */
15213 switch (macinfo_type
)
15215 /* A zero macinfo type indicates the end of the macro
15220 case DW_MACRO_GNU_define
:
15221 case DW_MACRO_GNU_undef
:
15222 case DW_MACRO_GNU_define_indirect
:
15223 case DW_MACRO_GNU_undef_indirect
:
15225 unsigned int bytes_read
;
15230 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15231 mac_ptr
+= bytes_read
;
15233 if (macinfo_type
== DW_MACRO_GNU_define
15234 || macinfo_type
== DW_MACRO_GNU_undef
)
15236 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15237 mac_ptr
+= bytes_read
;
15241 LONGEST str_offset
;
15243 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
15244 mac_ptr
+= offset_size
;
15246 body
= read_indirect_string_at_offset (abfd
, str_offset
);
15249 is_define
= (macinfo_type
== DW_MACRO_GNU_define
15250 || macinfo_type
== DW_MACRO_GNU_define_indirect
);
15251 if (! current_file
)
15253 /* DWARF violation as no main source is present. */
15254 complaint (&symfile_complaints
,
15255 _("debug info with no main source gives macro %s "
15257 is_define
? _("definition") : _("undefinition"),
15261 if ((line
== 0 && !at_commandline
)
15262 || (line
!= 0 && at_commandline
))
15263 complaint (&symfile_complaints
,
15264 _("debug info gives %s macro %s with %s line %d: %s"),
15265 at_commandline
? _("command-line") : _("in-file"),
15266 is_define
? _("definition") : _("undefinition"),
15267 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
15270 parse_macro_definition (current_file
, line
, body
);
15273 gdb_assert (macinfo_type
== DW_MACRO_GNU_undef
15274 || macinfo_type
== DW_MACRO_GNU_undef_indirect
);
15275 macro_undef (current_file
, line
, body
);
15280 case DW_MACRO_GNU_start_file
:
15282 unsigned int bytes_read
;
15285 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15286 mac_ptr
+= bytes_read
;
15287 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15288 mac_ptr
+= bytes_read
;
15290 if ((line
== 0 && !at_commandline
)
15291 || (line
!= 0 && at_commandline
))
15292 complaint (&symfile_complaints
,
15293 _("debug info gives source %d included "
15294 "from %s at %s line %d"),
15295 file
, at_commandline
? _("command-line") : _("file"),
15296 line
== 0 ? _("zero") : _("non-zero"), line
);
15298 if (at_commandline
)
15300 /* This DW_MACRO_GNU_start_file was executed in the
15302 at_commandline
= 0;
15305 current_file
= macro_start_file (file
, line
,
15306 current_file
, comp_dir
,
15311 case DW_MACRO_GNU_end_file
:
15312 if (! current_file
)
15313 complaint (&symfile_complaints
,
15314 _("macro debug info has an unmatched "
15315 "`close_file' directive"));
15318 current_file
= current_file
->included_by
;
15319 if (! current_file
)
15321 enum dwarf_macro_record_type next_type
;
15323 /* GCC circa March 2002 doesn't produce the zero
15324 type byte marking the end of the compilation
15325 unit. Complain if it's not there, but exit no
15328 /* Do we at least have room for a macinfo type byte? */
15329 if (mac_ptr
>= mac_end
)
15331 dwarf2_macros_too_long_complaint (section
);
15335 /* We don't increment mac_ptr here, so this is just
15337 next_type
= read_1_byte (abfd
, mac_ptr
);
15338 if (next_type
!= 0)
15339 complaint (&symfile_complaints
,
15340 _("no terminating 0-type entry for "
15341 "macros in `.debug_macinfo' section"));
15348 case DW_MACRO_GNU_transparent_include
:
15353 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
15354 mac_ptr
+= offset_size
;
15356 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
15359 /* This has actually happened; see
15360 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
15361 complaint (&symfile_complaints
,
15362 _("recursive DW_MACRO_GNU_transparent_include in "
15363 ".debug_macro section"));
15369 dwarf_decode_macro_bytes (abfd
,
15370 section
->buffer
+ offset
,
15371 mac_end
, current_file
,
15373 section
, section_is_gnu
,
15374 offset_size
, objfile
, include_hash
);
15376 htab_remove_elt (include_hash
, mac_ptr
);
15381 case DW_MACINFO_vendor_ext
:
15382 if (!section_is_gnu
)
15384 unsigned int bytes_read
;
15387 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15388 mac_ptr
+= bytes_read
;
15389 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15390 mac_ptr
+= bytes_read
;
15392 /* We don't recognize any vendor extensions. */
15398 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
15399 mac_ptr
, abfd
, offset_size
,
15401 if (mac_ptr
== NULL
)
15405 } while (macinfo_type
!= 0);
15409 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
15410 char *comp_dir
, bfd
*abfd
,
15411 struct dwarf2_cu
*cu
,
15412 struct dwarf2_section_info
*section
,
15413 int section_is_gnu
)
15415 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15416 gdb_byte
*mac_ptr
, *mac_end
;
15417 struct macro_source_file
*current_file
= 0;
15418 enum dwarf_macro_record_type macinfo_type
;
15419 unsigned int offset_size
= cu
->header
.offset_size
;
15420 gdb_byte
*opcode_definitions
[256];
15421 struct cleanup
*cleanup
;
15422 htab_t include_hash
;
15425 dwarf2_read_section (objfile
, section
);
15426 if (section
->buffer
== NULL
)
15428 complaint (&symfile_complaints
, _("missing %s section"),
15429 section
->asection
->name
);
15433 /* First pass: Find the name of the base filename.
15434 This filename is needed in order to process all macros whose definition
15435 (or undefinition) comes from the command line. These macros are defined
15436 before the first DW_MACINFO_start_file entry, and yet still need to be
15437 associated to the base file.
15439 To determine the base file name, we scan the macro definitions until we
15440 reach the first DW_MACINFO_start_file entry. We then initialize
15441 CURRENT_FILE accordingly so that any macro definition found before the
15442 first DW_MACINFO_start_file can still be associated to the base file. */
15444 mac_ptr
= section
->buffer
+ offset
;
15445 mac_end
= section
->buffer
+ section
->size
;
15447 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
15448 &offset_size
, section_is_gnu
);
15449 if (mac_ptr
== NULL
)
15451 /* We already issued a complaint. */
15457 /* Do we at least have room for a macinfo type byte? */
15458 if (mac_ptr
>= mac_end
)
15460 /* Complaint is printed during the second pass as GDB will probably
15461 stop the first pass earlier upon finding
15462 DW_MACINFO_start_file. */
15466 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
15469 /* Note that we rely on the fact that the corresponding GNU and
15470 DWARF constants are the same. */
15471 switch (macinfo_type
)
15473 /* A zero macinfo type indicates the end of the macro
15478 case DW_MACRO_GNU_define
:
15479 case DW_MACRO_GNU_undef
:
15480 /* Only skip the data by MAC_PTR. */
15482 unsigned int bytes_read
;
15484 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15485 mac_ptr
+= bytes_read
;
15486 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15487 mac_ptr
+= bytes_read
;
15491 case DW_MACRO_GNU_start_file
:
15493 unsigned int bytes_read
;
15496 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15497 mac_ptr
+= bytes_read
;
15498 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15499 mac_ptr
+= bytes_read
;
15501 current_file
= macro_start_file (file
, line
, current_file
,
15502 comp_dir
, lh
, objfile
);
15506 case DW_MACRO_GNU_end_file
:
15507 /* No data to skip by MAC_PTR. */
15510 case DW_MACRO_GNU_define_indirect
:
15511 case DW_MACRO_GNU_undef_indirect
:
15513 unsigned int bytes_read
;
15515 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15516 mac_ptr
+= bytes_read
;
15517 mac_ptr
+= offset_size
;
15521 case DW_MACRO_GNU_transparent_include
:
15522 /* Note that, according to the spec, a transparent include
15523 chain cannot call DW_MACRO_GNU_start_file. So, we can just
15524 skip this opcode. */
15525 mac_ptr
+= offset_size
;
15528 case DW_MACINFO_vendor_ext
:
15529 /* Only skip the data by MAC_PTR. */
15530 if (!section_is_gnu
)
15532 unsigned int bytes_read
;
15534 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
15535 mac_ptr
+= bytes_read
;
15536 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
15537 mac_ptr
+= bytes_read
;
15542 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
15543 mac_ptr
, abfd
, offset_size
,
15545 if (mac_ptr
== NULL
)
15549 } while (macinfo_type
!= 0 && current_file
== NULL
);
15551 /* Second pass: Process all entries.
15553 Use the AT_COMMAND_LINE flag to determine whether we are still processing
15554 command-line macro definitions/undefinitions. This flag is unset when we
15555 reach the first DW_MACINFO_start_file entry. */
15557 include_hash
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
15558 NULL
, xcalloc
, xfree
);
15559 cleanup
= make_cleanup_htab_delete (include_hash
);
15560 mac_ptr
= section
->buffer
+ offset
;
15561 slot
= htab_find_slot (include_hash
, mac_ptr
, INSERT
);
15563 dwarf_decode_macro_bytes (abfd
, mac_ptr
, mac_end
,
15564 current_file
, lh
, comp_dir
, section
, section_is_gnu
,
15565 offset_size
, objfile
, include_hash
);
15566 do_cleanups (cleanup
);
15569 /* Check if the attribute's form is a DW_FORM_block*
15570 if so return true else false. */
15572 attr_form_is_block (struct attribute
*attr
)
15574 return (attr
== NULL
? 0 :
15575 attr
->form
== DW_FORM_block1
15576 || attr
->form
== DW_FORM_block2
15577 || attr
->form
== DW_FORM_block4
15578 || attr
->form
== DW_FORM_block
15579 || attr
->form
== DW_FORM_exprloc
);
15582 /* Return non-zero if ATTR's value is a section offset --- classes
15583 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
15584 You may use DW_UNSND (attr) to retrieve such offsets.
15586 Section 7.5.4, "Attribute Encodings", explains that no attribute
15587 may have a value that belongs to more than one of these classes; it
15588 would be ambiguous if we did, because we use the same forms for all
15591 attr_form_is_section_offset (struct attribute
*attr
)
15593 return (attr
->form
== DW_FORM_data4
15594 || attr
->form
== DW_FORM_data8
15595 || attr
->form
== DW_FORM_sec_offset
);
15599 /* Return non-zero if ATTR's value falls in the 'constant' class, or
15600 zero otherwise. When this function returns true, you can apply
15601 dwarf2_get_attr_constant_value to it.
15603 However, note that for some attributes you must check
15604 attr_form_is_section_offset before using this test. DW_FORM_data4
15605 and DW_FORM_data8 are members of both the constant class, and of
15606 the classes that contain offsets into other debug sections
15607 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
15608 that, if an attribute's can be either a constant or one of the
15609 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
15610 taken as section offsets, not constants. */
15612 attr_form_is_constant (struct attribute
*attr
)
15614 switch (attr
->form
)
15616 case DW_FORM_sdata
:
15617 case DW_FORM_udata
:
15618 case DW_FORM_data1
:
15619 case DW_FORM_data2
:
15620 case DW_FORM_data4
:
15621 case DW_FORM_data8
:
15628 /* A helper function that fills in a dwarf2_loclist_baton. */
15631 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
15632 struct dwarf2_loclist_baton
*baton
,
15633 struct attribute
*attr
)
15635 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
15636 &dwarf2_per_objfile
->loc
);
15638 baton
->per_cu
= cu
->per_cu
;
15639 gdb_assert (baton
->per_cu
);
15640 /* We don't know how long the location list is, but make sure we
15641 don't run off the edge of the section. */
15642 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
15643 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
15644 baton
->base_address
= cu
->base_address
;
15648 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
15649 struct dwarf2_cu
*cu
)
15651 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
15653 if (attr_form_is_section_offset (attr
)
15654 /* ".debug_loc" may not exist at all, or the offset may be outside
15655 the section. If so, fall through to the complaint in the
15657 && DW_UNSND (attr
) < dwarf2_section_size (objfile
,
15658 &dwarf2_per_objfile
->loc
))
15660 struct dwarf2_loclist_baton
*baton
;
15662 baton
= obstack_alloc (&objfile
->objfile_obstack
,
15663 sizeof (struct dwarf2_loclist_baton
));
15665 fill_in_loclist_baton (cu
, baton
, attr
);
15667 if (cu
->base_known
== 0)
15668 complaint (&symfile_complaints
,
15669 _("Location list used without "
15670 "specifying the CU base address."));
15672 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
15673 SYMBOL_LOCATION_BATON (sym
) = baton
;
15677 struct dwarf2_locexpr_baton
*baton
;
15679 baton
= obstack_alloc (&objfile
->objfile_obstack
,
15680 sizeof (struct dwarf2_locexpr_baton
));
15681 baton
->per_cu
= cu
->per_cu
;
15682 gdb_assert (baton
->per_cu
);
15684 if (attr_form_is_block (attr
))
15686 /* Note that we're just copying the block's data pointer
15687 here, not the actual data. We're still pointing into the
15688 info_buffer for SYM's objfile; right now we never release
15689 that buffer, but when we do clean up properly this may
15691 baton
->size
= DW_BLOCK (attr
)->size
;
15692 baton
->data
= DW_BLOCK (attr
)->data
;
15696 dwarf2_invalid_attrib_class_complaint ("location description",
15697 SYMBOL_NATURAL_NAME (sym
));
15701 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
15702 SYMBOL_LOCATION_BATON (sym
) = baton
;
15706 /* Return the OBJFILE associated with the compilation unit CU. If CU
15707 came from a separate debuginfo file, then the master objfile is
15711 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
15713 struct objfile
*objfile
= per_cu
->objfile
;
15715 /* Return the master objfile, so that we can report and look up the
15716 correct file containing this variable. */
15717 if (objfile
->separate_debug_objfile_backlink
)
15718 objfile
= objfile
->separate_debug_objfile_backlink
;
15723 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
15724 (CU_HEADERP is unused in such case) or prepare a temporary copy at
15725 CU_HEADERP first. */
15727 static const struct comp_unit_head
*
15728 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
15729 struct dwarf2_per_cu_data
*per_cu
)
15731 struct objfile
*objfile
;
15732 struct dwarf2_per_objfile
*per_objfile
;
15733 gdb_byte
*info_ptr
;
15736 return &per_cu
->cu
->header
;
15738 objfile
= per_cu
->objfile
;
15739 per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15740 info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
15742 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
15743 read_comp_unit_head (cu_headerp
, info_ptr
, objfile
->obfd
);
15748 /* Return the address size given in the compilation unit header for CU. */
15751 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
15753 struct comp_unit_head cu_header_local
;
15754 const struct comp_unit_head
*cu_headerp
;
15756 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
15758 return cu_headerp
->addr_size
;
15761 /* Return the offset size given in the compilation unit header for CU. */
15764 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
15766 struct comp_unit_head cu_header_local
;
15767 const struct comp_unit_head
*cu_headerp
;
15769 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
15771 return cu_headerp
->offset_size
;
15774 /* See its dwarf2loc.h declaration. */
15777 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
15779 struct comp_unit_head cu_header_local
;
15780 const struct comp_unit_head
*cu_headerp
;
15782 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
15784 if (cu_headerp
->version
== 2)
15785 return cu_headerp
->addr_size
;
15787 return cu_headerp
->offset_size
;
15790 /* Return the text offset of the CU. The returned offset comes from
15791 this CU's objfile. If this objfile came from a separate debuginfo
15792 file, then the offset may be different from the corresponding
15793 offset in the parent objfile. */
15796 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
15798 struct objfile
*objfile
= per_cu
->objfile
;
15800 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
15803 /* Locate the .debug_info compilation unit from CU's objfile which contains
15804 the DIE at OFFSET. Raises an error on failure. */
15806 static struct dwarf2_per_cu_data
*
15807 dwarf2_find_containing_comp_unit (unsigned int offset
,
15808 struct objfile
*objfile
)
15810 struct dwarf2_per_cu_data
*this_cu
;
15814 high
= dwarf2_per_objfile
->n_comp_units
- 1;
15817 int mid
= low
+ (high
- low
) / 2;
15819 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
15824 gdb_assert (low
== high
);
15825 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
15828 error (_("Dwarf Error: could not find partial DIE containing "
15829 "offset 0x%lx [in module %s]"),
15830 (long) offset
, bfd_get_filename (objfile
->obfd
));
15832 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
15833 return dwarf2_per_objfile
->all_comp_units
[low
-1];
15837 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
15838 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
15839 && offset
>= this_cu
->offset
+ this_cu
->length
)
15840 error (_("invalid dwarf2 offset %u"), offset
);
15841 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
15846 /* Initialize dwarf2_cu CU, owned by PER_CU. */
15849 init_one_comp_unit (struct dwarf2_cu
*cu
, struct dwarf2_per_cu_data
*per_cu
)
15851 memset (cu
, 0, sizeof (*cu
));
15853 cu
->per_cu
= per_cu
;
15854 cu
->objfile
= per_cu
->objfile
;
15855 obstack_init (&cu
->comp_unit_obstack
);
15858 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
15861 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
)
15863 struct attribute
*attr
;
15865 /* Set the language we're debugging. */
15866 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
15868 set_cu_language (DW_UNSND (attr
), cu
);
15871 cu
->language
= language_minimal
;
15872 cu
->language_defn
= language_def (cu
->language
);
15876 /* Release one cached compilation unit, CU. We unlink it from the tree
15877 of compilation units, but we don't remove it from the read_in_chain;
15878 the caller is responsible for that.
15879 NOTE: DATA is a void * because this function is also used as a
15880 cleanup routine. */
15883 free_heap_comp_unit (void *data
)
15885 struct dwarf2_cu
*cu
= data
;
15887 gdb_assert (cu
->per_cu
!= NULL
);
15888 cu
->per_cu
->cu
= NULL
;
15891 obstack_free (&cu
->comp_unit_obstack
, NULL
);
15896 /* This cleanup function is passed the address of a dwarf2_cu on the stack
15897 when we're finished with it. We can't free the pointer itself, but be
15898 sure to unlink it from the cache. Also release any associated storage
15899 and perform cache maintenance.
15901 Only used during partial symbol parsing. */
15904 free_stack_comp_unit (void *data
)
15906 struct dwarf2_cu
*cu
= data
;
15908 gdb_assert (cu
->per_cu
!= NULL
);
15909 cu
->per_cu
->cu
= NULL
;
15912 obstack_free (&cu
->comp_unit_obstack
, NULL
);
15913 cu
->partial_dies
= NULL
;
15915 /* The previous code only did this if per_cu != NULL.
15916 But that would always succeed, so now we just unconditionally do
15917 the aging. This seems like the wrong place to do such aging,
15918 but cleaning that up is left for later. */
15919 age_cached_comp_units ();
15922 /* Free all cached compilation units. */
15925 free_cached_comp_units (void *data
)
15927 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
15929 per_cu
= dwarf2_per_objfile
->read_in_chain
;
15930 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
15931 while (per_cu
!= NULL
)
15933 struct dwarf2_per_cu_data
*next_cu
;
15935 next_cu
= per_cu
->cu
->read_in_chain
;
15937 free_heap_comp_unit (per_cu
->cu
);
15938 *last_chain
= next_cu
;
15944 /* Increase the age counter on each cached compilation unit, and free
15945 any that are too old. */
15948 age_cached_comp_units (void)
15950 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
15952 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
15953 per_cu
= dwarf2_per_objfile
->read_in_chain
;
15954 while (per_cu
!= NULL
)
15956 per_cu
->cu
->last_used
++;
15957 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
15958 dwarf2_mark (per_cu
->cu
);
15959 per_cu
= per_cu
->cu
->read_in_chain
;
15962 per_cu
= dwarf2_per_objfile
->read_in_chain
;
15963 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
15964 while (per_cu
!= NULL
)
15966 struct dwarf2_per_cu_data
*next_cu
;
15968 next_cu
= per_cu
->cu
->read_in_chain
;
15970 if (!per_cu
->cu
->mark
)
15972 free_heap_comp_unit (per_cu
->cu
);
15973 *last_chain
= next_cu
;
15976 last_chain
= &per_cu
->cu
->read_in_chain
;
15982 /* Remove a single compilation unit from the cache. */
15985 free_one_cached_comp_unit (void *target_cu
)
15987 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
15989 per_cu
= dwarf2_per_objfile
->read_in_chain
;
15990 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
15991 while (per_cu
!= NULL
)
15993 struct dwarf2_per_cu_data
*next_cu
;
15995 next_cu
= per_cu
->cu
->read_in_chain
;
15997 if (per_cu
->cu
== target_cu
)
15999 free_heap_comp_unit (per_cu
->cu
);
16000 *last_chain
= next_cu
;
16004 last_chain
= &per_cu
->cu
->read_in_chain
;
16010 /* Release all extra memory associated with OBJFILE. */
16013 dwarf2_free_objfile (struct objfile
*objfile
)
16015 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
16017 if (dwarf2_per_objfile
== NULL
)
16020 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
16021 free_cached_comp_units (NULL
);
16023 if (dwarf2_per_objfile
->quick_file_names_table
)
16024 htab_delete (dwarf2_per_objfile
->quick_file_names_table
);
16026 /* Everything else should be on the objfile obstack. */
16029 /* A pair of DIE offset and GDB type pointer. We store these
16030 in a hash table separate from the DIEs, and preserve them
16031 when the DIEs are flushed out of cache. */
16033 struct dwarf2_offset_and_type
16035 unsigned int offset
;
16039 /* Hash function for a dwarf2_offset_and_type. */
16042 offset_and_type_hash (const void *item
)
16044 const struct dwarf2_offset_and_type
*ofs
= item
;
16046 return ofs
->offset
;
16049 /* Equality function for a dwarf2_offset_and_type. */
16052 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
16054 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
16055 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
16057 return ofs_lhs
->offset
== ofs_rhs
->offset
;
16060 /* Set the type associated with DIE to TYPE. Save it in CU's hash
16061 table if necessary. For convenience, return TYPE.
16063 The DIEs reading must have careful ordering to:
16064 * Not cause infite loops trying to read in DIEs as a prerequisite for
16065 reading current DIE.
16066 * Not trying to dereference contents of still incompletely read in types
16067 while reading in other DIEs.
16068 * Enable referencing still incompletely read in types just by a pointer to
16069 the type without accessing its fields.
16071 Therefore caller should follow these rules:
16072 * Try to fetch any prerequisite types we may need to build this DIE type
16073 before building the type and calling set_die_type.
16074 * After building type call set_die_type for current DIE as soon as
16075 possible before fetching more types to complete the current type.
16076 * Make the type as complete as possible before fetching more types. */
16078 static struct type
*
16079 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
16081 struct dwarf2_offset_and_type
**slot
, ofs
;
16082 struct objfile
*objfile
= cu
->objfile
;
16083 htab_t
*type_hash_ptr
;
16085 /* For Ada types, make sure that the gnat-specific data is always
16086 initialized (if not already set). There are a few types where
16087 we should not be doing so, because the type-specific area is
16088 already used to hold some other piece of info (eg: TYPE_CODE_FLT
16089 where the type-specific area is used to store the floatformat).
16090 But this is not a problem, because the gnat-specific information
16091 is actually not needed for these types. */
16092 if (need_gnat_info (cu
)
16093 && TYPE_CODE (type
) != TYPE_CODE_FUNC
16094 && TYPE_CODE (type
) != TYPE_CODE_FLT
16095 && !HAVE_GNAT_AUX_INFO (type
))
16096 INIT_GNAT_SPECIFIC (type
);
16098 if (cu
->per_cu
->debug_types_section
)
16099 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
16101 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
16103 if (*type_hash_ptr
== NULL
)
16106 = htab_create_alloc_ex (127,
16107 offset_and_type_hash
,
16108 offset_and_type_eq
,
16110 &objfile
->objfile_obstack
,
16111 hashtab_obstack_allocate
,
16112 dummy_obstack_deallocate
);
16115 ofs
.offset
= die
->offset
;
16117 slot
= (struct dwarf2_offset_and_type
**)
16118 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
16120 complaint (&symfile_complaints
,
16121 _("A problem internal to GDB: DIE 0x%x has type already set"),
16123 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
16128 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
16129 table, or return NULL if the die does not have a saved type. */
16131 static struct type
*
16132 get_die_type_at_offset (unsigned int offset
,
16133 struct dwarf2_per_cu_data
*per_cu
)
16135 struct dwarf2_offset_and_type
*slot
, ofs
;
16138 if (per_cu
->debug_types_section
)
16139 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
16141 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
16142 if (type_hash
== NULL
)
16145 ofs
.offset
= offset
;
16146 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
16153 /* Look up the type for DIE in the appropriate type_hash table,
16154 or return NULL if DIE does not have a saved type. */
16156 static struct type
*
16157 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16159 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
16162 /* Add a dependence relationship from CU to REF_PER_CU. */
16165 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
16166 struct dwarf2_per_cu_data
*ref_per_cu
)
16170 if (cu
->dependencies
== NULL
)
16172 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
16173 NULL
, &cu
->comp_unit_obstack
,
16174 hashtab_obstack_allocate
,
16175 dummy_obstack_deallocate
);
16177 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
16179 *slot
= ref_per_cu
;
16182 /* Subroutine of dwarf2_mark to pass to htab_traverse.
16183 Set the mark field in every compilation unit in the
16184 cache that we must keep because we are keeping CU. */
16187 dwarf2_mark_helper (void **slot
, void *data
)
16189 struct dwarf2_per_cu_data
*per_cu
;
16191 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
16193 /* cu->dependencies references may not yet have been ever read if QUIT aborts
16194 reading of the chain. As such dependencies remain valid it is not much
16195 useful to track and undo them during QUIT cleanups. */
16196 if (per_cu
->cu
== NULL
)
16199 if (per_cu
->cu
->mark
)
16201 per_cu
->cu
->mark
= 1;
16203 if (per_cu
->cu
->dependencies
!= NULL
)
16204 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
16209 /* Set the mark field in CU and in every other compilation unit in the
16210 cache that we must keep because we are keeping CU. */
16213 dwarf2_mark (struct dwarf2_cu
*cu
)
16218 if (cu
->dependencies
!= NULL
)
16219 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
16223 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
16227 per_cu
->cu
->mark
= 0;
16228 per_cu
= per_cu
->cu
->read_in_chain
;
16232 /* Trivial hash function for partial_die_info: the hash value of a DIE
16233 is its offset in .debug_info for this objfile. */
16236 partial_die_hash (const void *item
)
16238 const struct partial_die_info
*part_die
= item
;
16240 return part_die
->offset
;
16243 /* Trivial comparison function for partial_die_info structures: two DIEs
16244 are equal if they have the same offset. */
16247 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
16249 const struct partial_die_info
*part_die_lhs
= item_lhs
;
16250 const struct partial_die_info
*part_die_rhs
= item_rhs
;
16252 return part_die_lhs
->offset
== part_die_rhs
->offset
;
16255 static struct cmd_list_element
*set_dwarf2_cmdlist
;
16256 static struct cmd_list_element
*show_dwarf2_cmdlist
;
16259 set_dwarf2_cmd (char *args
, int from_tty
)
16261 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
16265 show_dwarf2_cmd (char *args
, int from_tty
)
16267 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
16270 /* If section described by INFO was mmapped, munmap it now. */
16273 munmap_section_buffer (struct dwarf2_section_info
*info
)
16275 if (info
->map_addr
!= NULL
)
16280 res
= munmap (info
->map_addr
, info
->map_len
);
16281 gdb_assert (res
== 0);
16283 /* Without HAVE_MMAP, we should never be here to begin with. */
16284 gdb_assert_not_reached ("no mmap support");
16289 /* munmap debug sections for OBJFILE, if necessary. */
16292 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
16294 struct dwarf2_per_objfile
*data
= d
;
16296 struct dwarf2_section_info
*section
;
16298 /* This is sorted according to the order they're defined in to make it easier
16299 to keep in sync. */
16300 munmap_section_buffer (&data
->info
);
16301 munmap_section_buffer (&data
->abbrev
);
16302 munmap_section_buffer (&data
->line
);
16303 munmap_section_buffer (&data
->loc
);
16304 munmap_section_buffer (&data
->macinfo
);
16305 munmap_section_buffer (&data
->macro
);
16306 munmap_section_buffer (&data
->str
);
16307 munmap_section_buffer (&data
->ranges
);
16308 munmap_section_buffer (&data
->frame
);
16309 munmap_section_buffer (&data
->eh_frame
);
16310 munmap_section_buffer (&data
->gdb_index
);
16313 VEC_iterate (dwarf2_section_info_def
, data
->types
, ix
, section
);
16315 munmap_section_buffer (section
);
16317 VEC_free (dwarf2_section_info_def
, data
->types
);
16321 /* The "save gdb-index" command. */
16323 /* The contents of the hash table we create when building the string
16325 struct strtab_entry
16327 offset_type offset
;
16331 /* Hash function for a strtab_entry.
16333 Function is used only during write_hash_table so no index format backward
16334 compatibility is needed. */
16337 hash_strtab_entry (const void *e
)
16339 const struct strtab_entry
*entry
= e
;
16340 return mapped_index_string_hash (INT_MAX
, entry
->str
);
16343 /* Equality function for a strtab_entry. */
16346 eq_strtab_entry (const void *a
, const void *b
)
16348 const struct strtab_entry
*ea
= a
;
16349 const struct strtab_entry
*eb
= b
;
16350 return !strcmp (ea
->str
, eb
->str
);
16353 /* Create a strtab_entry hash table. */
16356 create_strtab (void)
16358 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
16359 xfree
, xcalloc
, xfree
);
16362 /* Add a string to the constant pool. Return the string's offset in
16366 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
16369 struct strtab_entry entry
;
16370 struct strtab_entry
*result
;
16373 slot
= htab_find_slot (table
, &entry
, INSERT
);
16378 result
= XNEW (struct strtab_entry
);
16379 result
->offset
= obstack_object_size (cpool
);
16381 obstack_grow_str0 (cpool
, str
);
16384 return result
->offset
;
16387 /* An entry in the symbol table. */
16388 struct symtab_index_entry
16390 /* The name of the symbol. */
16392 /* The offset of the name in the constant pool. */
16393 offset_type index_offset
;
16394 /* A sorted vector of the indices of all the CUs that hold an object
16396 VEC (offset_type
) *cu_indices
;
16399 /* The symbol table. This is a power-of-2-sized hash table. */
16400 struct mapped_symtab
16402 offset_type n_elements
;
16404 struct symtab_index_entry
**data
;
16407 /* Hash function for a symtab_index_entry. */
16410 hash_symtab_entry (const void *e
)
16412 const struct symtab_index_entry
*entry
= e
;
16413 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
16414 sizeof (offset_type
) * VEC_length (offset_type
,
16415 entry
->cu_indices
),
16419 /* Equality function for a symtab_index_entry. */
16422 eq_symtab_entry (const void *a
, const void *b
)
16424 const struct symtab_index_entry
*ea
= a
;
16425 const struct symtab_index_entry
*eb
= b
;
16426 int len
= VEC_length (offset_type
, ea
->cu_indices
);
16427 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
16429 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
16430 VEC_address (offset_type
, eb
->cu_indices
),
16431 sizeof (offset_type
) * len
);
16434 /* Destroy a symtab_index_entry. */
16437 delete_symtab_entry (void *p
)
16439 struct symtab_index_entry
*entry
= p
;
16440 VEC_free (offset_type
, entry
->cu_indices
);
16444 /* Create a hash table holding symtab_index_entry objects. */
16447 create_symbol_hash_table (void)
16449 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
16450 delete_symtab_entry
, xcalloc
, xfree
);
16453 /* Create a new mapped symtab object. */
16455 static struct mapped_symtab
*
16456 create_mapped_symtab (void)
16458 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
16459 symtab
->n_elements
= 0;
16460 symtab
->size
= 1024;
16461 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
16465 /* Destroy a mapped_symtab. */
16468 cleanup_mapped_symtab (void *p
)
16470 struct mapped_symtab
*symtab
= p
;
16471 /* The contents of the array are freed when the other hash table is
16473 xfree (symtab
->data
);
16477 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
16480 Function is used only during write_hash_table so no index format backward
16481 compatibility is needed. */
16483 static struct symtab_index_entry
**
16484 find_slot (struct mapped_symtab
*symtab
, const char *name
)
16486 offset_type index
, step
, hash
= mapped_index_string_hash (INT_MAX
, name
);
16488 index
= hash
& (symtab
->size
- 1);
16489 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
16493 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
16494 return &symtab
->data
[index
];
16495 index
= (index
+ step
) & (symtab
->size
- 1);
16499 /* Expand SYMTAB's hash table. */
16502 hash_expand (struct mapped_symtab
*symtab
)
16504 offset_type old_size
= symtab
->size
;
16506 struct symtab_index_entry
**old_entries
= symtab
->data
;
16509 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
16511 for (i
= 0; i
< old_size
; ++i
)
16513 if (old_entries
[i
])
16515 struct symtab_index_entry
**slot
= find_slot (symtab
,
16516 old_entries
[i
]->name
);
16517 *slot
= old_entries
[i
];
16521 xfree (old_entries
);
16524 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
16525 is the index of the CU in which the symbol appears. */
16528 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
16529 offset_type cu_index
)
16531 struct symtab_index_entry
**slot
;
16533 ++symtab
->n_elements
;
16534 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
16535 hash_expand (symtab
);
16537 slot
= find_slot (symtab
, name
);
16540 *slot
= XNEW (struct symtab_index_entry
);
16541 (*slot
)->name
= name
;
16542 (*slot
)->cu_indices
= NULL
;
16544 /* Don't push an index twice. Due to how we add entries we only
16545 have to check the last one. */
16546 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
16547 || VEC_last (offset_type
, (*slot
)->cu_indices
) != cu_index
)
16548 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
16551 /* Add a vector of indices to the constant pool. */
16554 add_indices_to_cpool (htab_t symbol_hash_table
, struct obstack
*cpool
,
16555 struct symtab_index_entry
*entry
)
16559 slot
= htab_find_slot (symbol_hash_table
, entry
, INSERT
);
16562 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
16563 offset_type val
= MAYBE_SWAP (len
);
16568 entry
->index_offset
= obstack_object_size (cpool
);
16570 obstack_grow (cpool
, &val
, sizeof (val
));
16572 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
16575 val
= MAYBE_SWAP (iter
);
16576 obstack_grow (cpool
, &val
, sizeof (val
));
16581 struct symtab_index_entry
*old_entry
= *slot
;
16582 entry
->index_offset
= old_entry
->index_offset
;
16585 return entry
->index_offset
;
16588 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
16589 constant pool entries going into the obstack CPOOL. */
16592 write_hash_table (struct mapped_symtab
*symtab
,
16593 struct obstack
*output
, struct obstack
*cpool
)
16596 htab_t symbol_hash_table
;
16599 symbol_hash_table
= create_symbol_hash_table ();
16600 str_table
= create_strtab ();
16602 /* We add all the index vectors to the constant pool first, to
16603 ensure alignment is ok. */
16604 for (i
= 0; i
< symtab
->size
; ++i
)
16606 if (symtab
->data
[i
])
16607 add_indices_to_cpool (symbol_hash_table
, cpool
, symtab
->data
[i
]);
16610 /* Now write out the hash table. */
16611 for (i
= 0; i
< symtab
->size
; ++i
)
16613 offset_type str_off
, vec_off
;
16615 if (symtab
->data
[i
])
16617 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
16618 vec_off
= symtab
->data
[i
]->index_offset
;
16622 /* While 0 is a valid constant pool index, it is not valid
16623 to have 0 for both offsets. */
16628 str_off
= MAYBE_SWAP (str_off
);
16629 vec_off
= MAYBE_SWAP (vec_off
);
16631 obstack_grow (output
, &str_off
, sizeof (str_off
));
16632 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
16635 htab_delete (str_table
);
16636 htab_delete (symbol_hash_table
);
16639 /* Struct to map psymtab to CU index in the index file. */
16640 struct psymtab_cu_index_map
16642 struct partial_symtab
*psymtab
;
16643 unsigned int cu_index
;
16647 hash_psymtab_cu_index (const void *item
)
16649 const struct psymtab_cu_index_map
*map
= item
;
16651 return htab_hash_pointer (map
->psymtab
);
16655 eq_psymtab_cu_index (const void *item_lhs
, const void *item_rhs
)
16657 const struct psymtab_cu_index_map
*lhs
= item_lhs
;
16658 const struct psymtab_cu_index_map
*rhs
= item_rhs
;
16660 return lhs
->psymtab
== rhs
->psymtab
;
16663 /* Helper struct for building the address table. */
16664 struct addrmap_index_data
16666 struct objfile
*objfile
;
16667 struct obstack
*addr_obstack
;
16668 htab_t cu_index_htab
;
16670 /* Non-zero if the previous_* fields are valid.
16671 We can't write an entry until we see the next entry (since it is only then
16672 that we know the end of the entry). */
16673 int previous_valid
;
16674 /* Index of the CU in the table of all CUs in the index file. */
16675 unsigned int previous_cu_index
;
16676 /* Start address of the CU. */
16677 CORE_ADDR previous_cu_start
;
16680 /* Write an address entry to OBSTACK. */
16683 add_address_entry (struct objfile
*objfile
, struct obstack
*obstack
,
16684 CORE_ADDR start
, CORE_ADDR end
, unsigned int cu_index
)
16686 offset_type cu_index_to_write
;
16688 CORE_ADDR baseaddr
;
16690 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
16692 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, start
- baseaddr
);
16693 obstack_grow (obstack
, addr
, 8);
16694 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, end
- baseaddr
);
16695 obstack_grow (obstack
, addr
, 8);
16696 cu_index_to_write
= MAYBE_SWAP (cu_index
);
16697 obstack_grow (obstack
, &cu_index_to_write
, sizeof (offset_type
));
16700 /* Worker function for traversing an addrmap to build the address table. */
16703 add_address_entry_worker (void *datap
, CORE_ADDR start_addr
, void *obj
)
16705 struct addrmap_index_data
*data
= datap
;
16706 struct partial_symtab
*pst
= obj
;
16707 offset_type cu_index
;
16710 if (data
->previous_valid
)
16711 add_address_entry (data
->objfile
, data
->addr_obstack
,
16712 data
->previous_cu_start
, start_addr
,
16713 data
->previous_cu_index
);
16715 data
->previous_cu_start
= start_addr
;
16718 struct psymtab_cu_index_map find_map
, *map
;
16719 find_map
.psymtab
= pst
;
16720 map
= htab_find (data
->cu_index_htab
, &find_map
);
16721 gdb_assert (map
!= NULL
);
16722 data
->previous_cu_index
= map
->cu_index
;
16723 data
->previous_valid
= 1;
16726 data
->previous_valid
= 0;
16731 /* Write OBJFILE's address map to OBSTACK.
16732 CU_INDEX_HTAB is used to map addrmap entries to their CU indices
16733 in the index file. */
16736 write_address_map (struct objfile
*objfile
, struct obstack
*obstack
,
16737 htab_t cu_index_htab
)
16739 struct addrmap_index_data addrmap_index_data
;
16741 /* When writing the address table, we have to cope with the fact that
16742 the addrmap iterator only provides the start of a region; we have to
16743 wait until the next invocation to get the start of the next region. */
16745 addrmap_index_data
.objfile
= objfile
;
16746 addrmap_index_data
.addr_obstack
= obstack
;
16747 addrmap_index_data
.cu_index_htab
= cu_index_htab
;
16748 addrmap_index_data
.previous_valid
= 0;
16750 addrmap_foreach (objfile
->psymtabs_addrmap
, add_address_entry_worker
,
16751 &addrmap_index_data
);
16753 /* It's highly unlikely the last entry (end address = 0xff...ff)
16754 is valid, but we should still handle it.
16755 The end address is recorded as the start of the next region, but that
16756 doesn't work here. To cope we pass 0xff...ff, this is a rare situation
16758 if (addrmap_index_data
.previous_valid
)
16759 add_address_entry (objfile
, obstack
,
16760 addrmap_index_data
.previous_cu_start
, (CORE_ADDR
) -1,
16761 addrmap_index_data
.previous_cu_index
);
16764 /* Add a list of partial symbols to SYMTAB. */
16767 write_psymbols (struct mapped_symtab
*symtab
,
16769 struct partial_symbol
**psymp
,
16771 offset_type cu_index
,
16774 for (; count
-- > 0; ++psymp
)
16776 void **slot
, *lookup
;
16778 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
16779 error (_("Ada is not currently supported by the index"));
16781 /* We only want to add a given psymbol once. However, we also
16782 want to account for whether it is global or static. So, we
16783 may add it twice, using slightly different values. */
16786 uintptr_t val
= 1 | (uintptr_t) *psymp
;
16788 lookup
= (void *) val
;
16793 /* Only add a given psymbol once. */
16794 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
16798 add_index_entry (symtab
, SYMBOL_SEARCH_NAME (*psymp
), cu_index
);
16803 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
16804 exception if there is an error. */
16807 write_obstack (FILE *file
, struct obstack
*obstack
)
16809 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
16811 != obstack_object_size (obstack
))
16812 error (_("couldn't data write to file"));
16815 /* Unlink a file if the argument is not NULL. */
16818 unlink_if_set (void *p
)
16820 char **filename
= p
;
16822 unlink (*filename
);
16825 /* A helper struct used when iterating over debug_types. */
16826 struct signatured_type_index_data
16828 struct objfile
*objfile
;
16829 struct mapped_symtab
*symtab
;
16830 struct obstack
*types_list
;
16835 /* A helper function that writes a single signatured_type to an
16839 write_one_signatured_type (void **slot
, void *d
)
16841 struct signatured_type_index_data
*info
= d
;
16842 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
16843 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
16844 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
16847 write_psymbols (info
->symtab
,
16849 info
->objfile
->global_psymbols
.list
16850 + psymtab
->globals_offset
,
16851 psymtab
->n_global_syms
, info
->cu_index
,
16853 write_psymbols (info
->symtab
,
16855 info
->objfile
->static_psymbols
.list
16856 + psymtab
->statics_offset
,
16857 psymtab
->n_static_syms
, info
->cu_index
,
16860 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->per_cu
.offset
);
16861 obstack_grow (info
->types_list
, val
, 8);
16862 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
16863 obstack_grow (info
->types_list
, val
, 8);
16864 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
16865 obstack_grow (info
->types_list
, val
, 8);
16872 /* Create an index file for OBJFILE in the directory DIR. */
16875 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
16877 struct cleanup
*cleanup
;
16878 char *filename
, *cleanup_filename
;
16879 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
16880 struct obstack cu_list
, types_cu_list
;
16883 struct mapped_symtab
*symtab
;
16884 offset_type val
, size_of_contents
, total_len
;
16888 htab_t cu_index_htab
;
16889 struct psymtab_cu_index_map
*psymtab_cu_index_map
;
16891 if (!objfile
->psymtabs
|| !objfile
->psymtabs_addrmap
)
16894 if (dwarf2_per_objfile
->using_index
)
16895 error (_("Cannot use an index to create the index"));
16897 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) > 1)
16898 error (_("Cannot make an index when the file has multiple .debug_types sections"));
16900 if (stat (objfile
->name
, &st
) < 0)
16901 perror_with_name (objfile
->name
);
16903 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
16904 INDEX_SUFFIX
, (char *) NULL
);
16905 cleanup
= make_cleanup (xfree
, filename
);
16907 out_file
= fopen (filename
, "wb");
16909 error (_("Can't open `%s' for writing"), filename
);
16911 cleanup_filename
= filename
;
16912 make_cleanup (unlink_if_set
, &cleanup_filename
);
16914 symtab
= create_mapped_symtab ();
16915 make_cleanup (cleanup_mapped_symtab
, symtab
);
16917 obstack_init (&addr_obstack
);
16918 make_cleanup_obstack_free (&addr_obstack
);
16920 obstack_init (&cu_list
);
16921 make_cleanup_obstack_free (&cu_list
);
16923 obstack_init (&types_cu_list
);
16924 make_cleanup_obstack_free (&types_cu_list
);
16926 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
16927 NULL
, xcalloc
, xfree
);
16928 make_cleanup_htab_delete (psyms_seen
);
16930 /* While we're scanning CU's create a table that maps a psymtab pointer
16931 (which is what addrmap records) to its index (which is what is recorded
16932 in the index file). This will later be needed to write the address
16934 cu_index_htab
= htab_create_alloc (100,
16935 hash_psymtab_cu_index
,
16936 eq_psymtab_cu_index
,
16937 NULL
, xcalloc
, xfree
);
16938 make_cleanup_htab_delete (cu_index_htab
);
16939 psymtab_cu_index_map
= (struct psymtab_cu_index_map
*)
16940 xmalloc (sizeof (struct psymtab_cu_index_map
)
16941 * dwarf2_per_objfile
->n_comp_units
);
16942 make_cleanup (xfree
, psymtab_cu_index_map
);
16944 /* The CU list is already sorted, so we don't need to do additional
16945 work here. Also, the debug_types entries do not appear in
16946 all_comp_units, but only in their own hash table. */
16947 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
16949 struct dwarf2_per_cu_data
*per_cu
16950 = dwarf2_per_objfile
->all_comp_units
[i
];
16951 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
16953 struct psymtab_cu_index_map
*map
;
16956 write_psymbols (symtab
,
16958 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
16959 psymtab
->n_global_syms
, i
,
16961 write_psymbols (symtab
,
16963 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
16964 psymtab
->n_static_syms
, i
,
16967 map
= &psymtab_cu_index_map
[i
];
16968 map
->psymtab
= psymtab
;
16970 slot
= htab_find_slot (cu_index_htab
, map
, INSERT
);
16971 gdb_assert (slot
!= NULL
);
16972 gdb_assert (*slot
== NULL
);
16975 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
16976 obstack_grow (&cu_list
, val
, 8);
16977 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
16978 obstack_grow (&cu_list
, val
, 8);
16981 /* Dump the address map. */
16982 write_address_map (objfile
, &addr_obstack
, cu_index_htab
);
16984 /* Write out the .debug_type entries, if any. */
16985 if (dwarf2_per_objfile
->signatured_types
)
16987 struct signatured_type_index_data sig_data
;
16989 sig_data
.objfile
= objfile
;
16990 sig_data
.symtab
= symtab
;
16991 sig_data
.types_list
= &types_cu_list
;
16992 sig_data
.psyms_seen
= psyms_seen
;
16993 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
16994 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
16995 write_one_signatured_type
, &sig_data
);
16998 obstack_init (&constant_pool
);
16999 make_cleanup_obstack_free (&constant_pool
);
17000 obstack_init (&symtab_obstack
);
17001 make_cleanup_obstack_free (&symtab_obstack
);
17002 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
17004 obstack_init (&contents
);
17005 make_cleanup_obstack_free (&contents
);
17006 size_of_contents
= 6 * sizeof (offset_type
);
17007 total_len
= size_of_contents
;
17009 /* The version number. */
17010 val
= MAYBE_SWAP (5);
17011 obstack_grow (&contents
, &val
, sizeof (val
));
17013 /* The offset of the CU list from the start of the file. */
17014 val
= MAYBE_SWAP (total_len
);
17015 obstack_grow (&contents
, &val
, sizeof (val
));
17016 total_len
+= obstack_object_size (&cu_list
);
17018 /* The offset of the types CU list from the start of the file. */
17019 val
= MAYBE_SWAP (total_len
);
17020 obstack_grow (&contents
, &val
, sizeof (val
));
17021 total_len
+= obstack_object_size (&types_cu_list
);
17023 /* The offset of the address table from the start of the file. */
17024 val
= MAYBE_SWAP (total_len
);
17025 obstack_grow (&contents
, &val
, sizeof (val
));
17026 total_len
+= obstack_object_size (&addr_obstack
);
17028 /* The offset of the symbol table from the start of the file. */
17029 val
= MAYBE_SWAP (total_len
);
17030 obstack_grow (&contents
, &val
, sizeof (val
));
17031 total_len
+= obstack_object_size (&symtab_obstack
);
17033 /* The offset of the constant pool from the start of the file. */
17034 val
= MAYBE_SWAP (total_len
);
17035 obstack_grow (&contents
, &val
, sizeof (val
));
17036 total_len
+= obstack_object_size (&constant_pool
);
17038 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
17040 write_obstack (out_file
, &contents
);
17041 write_obstack (out_file
, &cu_list
);
17042 write_obstack (out_file
, &types_cu_list
);
17043 write_obstack (out_file
, &addr_obstack
);
17044 write_obstack (out_file
, &symtab_obstack
);
17045 write_obstack (out_file
, &constant_pool
);
17049 /* We want to keep the file, so we set cleanup_filename to NULL
17050 here. See unlink_if_set. */
17051 cleanup_filename
= NULL
;
17053 do_cleanups (cleanup
);
17056 /* Implementation of the `save gdb-index' command.
17058 Note that the file format used by this command is documented in the
17059 GDB manual. Any changes here must be documented there. */
17062 save_gdb_index_command (char *arg
, int from_tty
)
17064 struct objfile
*objfile
;
17067 error (_("usage: save gdb-index DIRECTORY"));
17069 ALL_OBJFILES (objfile
)
17073 /* If the objfile does not correspond to an actual file, skip it. */
17074 if (stat (objfile
->name
, &st
) < 0)
17077 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
17078 if (dwarf2_per_objfile
)
17080 volatile struct gdb_exception except
;
17082 TRY_CATCH (except
, RETURN_MASK_ERROR
)
17084 write_psymtabs_to_index (objfile
, arg
);
17086 if (except
.reason
< 0)
17087 exception_fprintf (gdb_stderr
, except
,
17088 _("Error while writing index for `%s': "),
17096 int dwarf2_always_disassemble
;
17099 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
17100 struct cmd_list_element
*c
, const char *value
)
17102 fprintf_filtered (file
,
17103 _("Whether to always disassemble "
17104 "DWARF expressions is %s.\n"),
17109 show_check_physname (struct ui_file
*file
, int from_tty
,
17110 struct cmd_list_element
*c
, const char *value
)
17112 fprintf_filtered (file
,
17113 _("Whether to check \"physname\" is %s.\n"),
17117 void _initialize_dwarf2_read (void);
17120 _initialize_dwarf2_read (void)
17122 struct cmd_list_element
*c
;
17124 dwarf2_objfile_data_key
17125 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
17127 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
17128 Set DWARF 2 specific variables.\n\
17129 Configure DWARF 2 variables such as the cache size"),
17130 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
17131 0/*allow-unknown*/, &maintenance_set_cmdlist
);
17133 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
17134 Show DWARF 2 specific variables\n\
17135 Show DWARF 2 variables such as the cache size"),
17136 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
17137 0/*allow-unknown*/, &maintenance_show_cmdlist
);
17139 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
17140 &dwarf2_max_cache_age
, _("\
17141 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
17142 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
17143 A higher limit means that cached compilation units will be stored\n\
17144 in memory longer, and more total memory will be used. Zero disables\n\
17145 caching, which can slow down startup."),
17147 show_dwarf2_max_cache_age
,
17148 &set_dwarf2_cmdlist
,
17149 &show_dwarf2_cmdlist
);
17151 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
17152 &dwarf2_always_disassemble
, _("\
17153 Set whether `info address' always disassembles DWARF expressions."), _("\
17154 Show whether `info address' always disassembles DWARF expressions."), _("\
17155 When enabled, DWARF expressions are always printed in an assembly-like\n\
17156 syntax. When disabled, expressions will be printed in a more\n\
17157 conversational style, when possible."),
17159 show_dwarf2_always_disassemble
,
17160 &set_dwarf2_cmdlist
,
17161 &show_dwarf2_cmdlist
);
17163 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
17164 Set debugging of the dwarf2 DIE reader."), _("\
17165 Show debugging of the dwarf2 DIE reader."), _("\
17166 When enabled (non-zero), DIEs are dumped after they are read in.\n\
17167 The value is the maximum depth to print."),
17170 &setdebuglist
, &showdebuglist
);
17172 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
17173 Set cross-checking of \"physname\" code against demangler."), _("\
17174 Show cross-checking of \"physname\" code against demangler."), _("\
17175 When enabled, GDB's internal \"physname\" code is checked against\n\
17177 NULL
, show_check_physname
,
17178 &setdebuglist
, &showdebuglist
);
17180 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
17182 Save a gdb-index file.\n\
17183 Usage: save gdb-index DIRECTORY"),
17185 set_cmd_completer (c
, filename_completer
);