1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
51 #include "typeprint.h"
54 #include "exceptions.h"
56 #include "completer.h"
62 #include "gdb_string.h"
63 #include "gdb_assert.h"
64 #include <sys/types.h>
71 #define MAP_FAILED ((void *) -1)
75 typedef struct symbol
*symbolp
;
79 /* .debug_info header for a compilation unit
80 Because of alignment constraints, this structure has padding and cannot
81 be mapped directly onto the beginning of the .debug_info section. */
82 typedef struct comp_unit_header
84 unsigned int length
; /* length of the .debug_info
86 unsigned short version
; /* version number -- 2 for DWARF
88 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
89 unsigned char addr_size
; /* byte size of an address -- 4 */
92 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
95 /* .debug_line statement program prologue
96 Because of alignment constraints, this structure has padding and cannot
97 be mapped directly onto the beginning of the .debug_info section. */
98 typedef struct statement_prologue
100 unsigned int total_length
; /* byte length of the statement
102 unsigned short version
; /* version number -- 2 for DWARF
104 unsigned int prologue_length
; /* # bytes between prologue &
106 unsigned char minimum_instruction_length
; /* byte size of
108 unsigned char default_is_stmt
; /* initial value of is_stmt
111 unsigned char line_range
;
112 unsigned char opcode_base
; /* number assigned to first special
114 unsigned char *standard_opcode_lengths
;
118 /* When non-zero, dump DIEs after they are read in. */
119 static int dwarf2_die_debug
= 0;
123 /* When set, the file that we're processing is known to have debugging
124 info for C++ namespaces. GCC 3.3.x did not produce this information,
125 but later versions do. */
127 static int processing_has_namespace_info
;
129 static const struct objfile_data
*dwarf2_objfile_data_key
;
131 struct dwarf2_section_info
137 /* True if we have tried to read this section. */
141 /* All offsets in the index are of this type. It must be
142 architecture-independent. */
143 typedef uint32_t offset_type
;
145 DEF_VEC_I (offset_type
);
147 /* A description of the mapped index. The file format is described in
148 a comment by the code that writes the index. */
151 /* The total length of the buffer. */
153 /* A pointer to the address table data. */
154 const gdb_byte
*address_table
;
155 /* Size of the address table data in bytes. */
156 offset_type address_table_size
;
157 /* The hash table. */
158 const offset_type
*index_table
;
159 /* Size in slots, each slot is 2 offset_types. */
160 offset_type index_table_slots
;
161 /* A pointer to the constant pool. */
162 const char *constant_pool
;
165 struct dwarf2_per_objfile
167 struct dwarf2_section_info info
;
168 struct dwarf2_section_info abbrev
;
169 struct dwarf2_section_info line
;
170 struct dwarf2_section_info loc
;
171 struct dwarf2_section_info macinfo
;
172 struct dwarf2_section_info str
;
173 struct dwarf2_section_info ranges
;
174 struct dwarf2_section_info types
;
175 struct dwarf2_section_info frame
;
176 struct dwarf2_section_info eh_frame
;
177 struct dwarf2_section_info gdb_index
;
180 struct objfile
*objfile
;
182 /* A list of all the compilation units. This is used to locate
183 the target compilation unit of a particular reference. */
184 struct dwarf2_per_cu_data
**all_comp_units
;
186 /* The number of compilation units in ALL_COMP_UNITS. */
189 /* The number of .debug_types-related CUs. */
190 int n_type_comp_units
;
192 /* The .debug_types-related CUs. */
193 struct dwarf2_per_cu_data
**type_comp_units
;
195 /* A chain of compilation units that are currently read in, so that
196 they can be freed later. */
197 struct dwarf2_per_cu_data
*read_in_chain
;
199 /* A table mapping .debug_types signatures to its signatured_type entry.
200 This is NULL if the .debug_types section hasn't been read in yet. */
201 htab_t signatured_types
;
203 /* A flag indicating wether this objfile has a section loaded at a
205 int has_section_at_zero
;
207 /* True if we are using the mapped index. */
208 unsigned char using_index
;
210 /* The mapped index. */
211 struct mapped_index
*index_table
;
213 /* Set during partial symbol reading, to prevent queueing of full
215 int reading_partial_symbols
;
217 /* Table mapping type .debug_info DIE offsets to types.
218 This is NULL if not allocated yet.
219 It (currently) makes sense to allocate debug_types_type_hash lazily.
220 To keep things simple we allocate both lazily. */
221 htab_t debug_info_type_hash
;
223 /* Table mapping type .debug_types DIE offsets to types.
224 This is NULL if not allocated yet. */
225 htab_t debug_types_type_hash
;
228 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
230 /* names of the debugging sections */
232 /* Note that if the debugging section has been compressed, it might
233 have a name like .zdebug_info. */
235 #define INFO_SECTION "debug_info"
236 #define ABBREV_SECTION "debug_abbrev"
237 #define LINE_SECTION "debug_line"
238 #define LOC_SECTION "debug_loc"
239 #define MACINFO_SECTION "debug_macinfo"
240 #define STR_SECTION "debug_str"
241 #define RANGES_SECTION "debug_ranges"
242 #define TYPES_SECTION "debug_types"
243 #define FRAME_SECTION "debug_frame"
244 #define EH_FRAME_SECTION "eh_frame"
245 #define GDB_INDEX_SECTION "gdb_index"
247 /* local data types */
249 /* We hold several abbreviation tables in memory at the same time. */
250 #ifndef ABBREV_HASH_SIZE
251 #define ABBREV_HASH_SIZE 121
254 /* The data in a compilation unit header, after target2host
255 translation, looks like this. */
256 struct comp_unit_head
260 unsigned char addr_size
;
261 unsigned char signed_addr_p
;
262 unsigned int abbrev_offset
;
264 /* Size of file offsets; either 4 or 8. */
265 unsigned int offset_size
;
267 /* Size of the length field; either 4 or 12. */
268 unsigned int initial_length_size
;
270 /* Offset to the first byte of this compilation unit header in the
271 .debug_info section, for resolving relative reference dies. */
274 /* Offset to first die in this cu from the start of the cu.
275 This will be the first byte following the compilation unit header. */
276 unsigned int first_die_offset
;
279 /* Type used for delaying computation of method physnames.
280 See comments for compute_delayed_physnames. */
281 struct delayed_method_info
283 /* The type to which the method is attached, i.e., its parent class. */
286 /* The index of the method in the type's function fieldlists. */
289 /* The index of the method in the fieldlist. */
292 /* The name of the DIE. */
295 /* The DIE associated with this method. */
296 struct die_info
*die
;
299 typedef struct delayed_method_info delayed_method_info
;
300 DEF_VEC_O (delayed_method_info
);
302 /* Internal state when decoding a particular compilation unit. */
305 /* The objfile containing this compilation unit. */
306 struct objfile
*objfile
;
308 /* The header of the compilation unit. */
309 struct comp_unit_head header
;
311 /* Base address of this compilation unit. */
312 CORE_ADDR base_address
;
314 /* Non-zero if base_address has been set. */
317 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
319 /* The language we are debugging. */
320 enum language language
;
321 const struct language_defn
*language_defn
;
323 const char *producer
;
325 /* The generic symbol table building routines have separate lists for
326 file scope symbols and all all other scopes (local scopes). So
327 we need to select the right one to pass to add_symbol_to_list().
328 We do it by keeping a pointer to the correct list in list_in_scope.
330 FIXME: The original dwarf code just treated the file scope as the
331 first local scope, and all other local scopes as nested local
332 scopes, and worked fine. Check to see if we really need to
333 distinguish these in buildsym.c. */
334 struct pending
**list_in_scope
;
336 /* DWARF abbreviation table associated with this compilation unit. */
337 struct abbrev_info
**dwarf2_abbrevs
;
339 /* Storage for the abbrev table. */
340 struct obstack abbrev_obstack
;
342 /* Hash table holding all the loaded partial DIEs. */
345 /* Storage for things with the same lifetime as this read-in compilation
346 unit, including partial DIEs. */
347 struct obstack comp_unit_obstack
;
349 /* When multiple dwarf2_cu structures are living in memory, this field
350 chains them all together, so that they can be released efficiently.
351 We will probably also want a generation counter so that most-recently-used
352 compilation units are cached... */
353 struct dwarf2_per_cu_data
*read_in_chain
;
355 /* Backchain to our per_cu entry if the tree has been built. */
356 struct dwarf2_per_cu_data
*per_cu
;
358 /* How many compilation units ago was this CU last referenced? */
361 /* A hash table of die offsets for following references. */
364 /* Full DIEs if read in. */
365 struct die_info
*dies
;
367 /* A set of pointers to dwarf2_per_cu_data objects for compilation
368 units referenced by this one. Only set during full symbol processing;
369 partial symbol tables do not have dependencies. */
372 /* Header data from the line table, during full symbol processing. */
373 struct line_header
*line_header
;
375 /* A list of methods which need to have physnames computed
376 after all type information has been read. */
377 VEC (delayed_method_info
) *method_list
;
379 /* Mark used when releasing cached dies. */
380 unsigned int mark
: 1;
382 /* This flag will be set if this compilation unit might include
383 inter-compilation-unit references. */
384 unsigned int has_form_ref_addr
: 1;
386 /* This flag will be set if this compilation unit includes any
387 DW_TAG_namespace DIEs. If we know that there are explicit
388 DIEs for namespaces, we don't need to try to infer them
389 from mangled names. */
390 unsigned int has_namespace_info
: 1;
393 /* When using the index (and thus not using psymtabs), each CU has an
394 object of this type. This is used to hold information needed by
395 the various "quick" methods. */
396 struct dwarf2_per_cu_quick_data
398 /* The line table. This can be NULL if there was no line table. */
399 struct line_header
*lines
;
401 /* The file names from the line table. */
402 const char **file_names
;
403 /* The file names from the line table after being run through
405 const char **full_names
;
407 /* The corresponding symbol table. This is NULL if symbols for this
408 CU have not yet been read. */
409 struct symtab
*symtab
;
411 /* A temporary mark bit used when iterating over all CUs in
412 expand_symtabs_matching. */
413 unsigned int mark
: 1;
415 /* True if we've tried to read the line table. */
416 unsigned int read_lines
: 1;
419 /* Persistent data held for a compilation unit, even when not
420 processing it. We put a pointer to this structure in the
421 read_symtab_private field of the psymtab. If we encounter
422 inter-compilation-unit references, we also maintain a sorted
423 list of all compilation units. */
425 struct dwarf2_per_cu_data
427 /* The start offset and length of this compilation unit. 2**29-1
428 bytes should suffice to store the length of any compilation unit
429 - if it doesn't, GDB will fall over anyway.
430 NOTE: Unlike comp_unit_head.length, this length includes
431 initial_length_size. */
433 unsigned int length
: 29;
435 /* Flag indicating this compilation unit will be read in before
436 any of the current compilation units are processed. */
437 unsigned int queued
: 1;
439 /* This flag will be set if we need to load absolutely all DIEs
440 for this compilation unit, instead of just the ones we think
441 are interesting. It gets set if we look for a DIE in the
442 hash table and don't find it. */
443 unsigned int load_all_dies
: 1;
445 /* Non-zero if this CU is from .debug_types.
446 Otherwise it's from .debug_info. */
447 unsigned int from_debug_types
: 1;
449 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
450 of the CU cache it gets reset to NULL again. */
451 struct dwarf2_cu
*cu
;
453 /* The corresponding objfile. */
454 struct objfile
*objfile
;
456 /* When using partial symbol tables, the 'psymtab' field is active.
457 Otherwise the 'quick' field is active. */
460 /* The partial symbol table associated with this compilation unit,
461 or NULL for partial units (which do not have an associated
463 struct partial_symtab
*psymtab
;
465 /* Data needed by the "quick" functions. */
466 struct dwarf2_per_cu_quick_data
*quick
;
470 /* Entry in the signatured_types hash table. */
472 struct signatured_type
476 /* Offset in .debug_types of the TU (type_unit) for this type. */
479 /* Offset in .debug_types of the type defined by this TU. */
480 unsigned int type_offset
;
482 /* The CU(/TU) of this type. */
483 struct dwarf2_per_cu_data per_cu
;
486 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
487 which are used for both .debug_info and .debug_types dies.
488 All parameters here are unchanging for the life of the call.
489 This struct exists to abstract away the constant parameters of
492 struct die_reader_specs
494 /* The bfd of this objfile. */
497 /* The CU of the DIE we are parsing. */
498 struct dwarf2_cu
*cu
;
500 /* Pointer to start of section buffer.
501 This is either the start of .debug_info or .debug_types. */
502 const gdb_byte
*buffer
;
505 /* The line number information for a compilation unit (found in the
506 .debug_line section) begins with a "statement program header",
507 which contains the following information. */
510 unsigned int total_length
;
511 unsigned short version
;
512 unsigned int header_length
;
513 unsigned char minimum_instruction_length
;
514 unsigned char maximum_ops_per_instruction
;
515 unsigned char default_is_stmt
;
517 unsigned char line_range
;
518 unsigned char opcode_base
;
520 /* standard_opcode_lengths[i] is the number of operands for the
521 standard opcode whose value is i. This means that
522 standard_opcode_lengths[0] is unused, and the last meaningful
523 element is standard_opcode_lengths[opcode_base - 1]. */
524 unsigned char *standard_opcode_lengths
;
526 /* The include_directories table. NOTE! These strings are not
527 allocated with xmalloc; instead, they are pointers into
528 debug_line_buffer. If you try to free them, `free' will get
530 unsigned int num_include_dirs
, include_dirs_size
;
533 /* The file_names table. NOTE! These strings are not allocated
534 with xmalloc; instead, they are pointers into debug_line_buffer.
535 Don't try to free them directly. */
536 unsigned int num_file_names
, file_names_size
;
540 unsigned int dir_index
;
541 unsigned int mod_time
;
543 int included_p
; /* Non-zero if referenced by the Line Number Program. */
544 struct symtab
*symtab
; /* The associated symbol table, if any. */
547 /* The start and end of the statement program following this
548 header. These point into dwarf2_per_objfile->line_buffer. */
549 gdb_byte
*statement_program_start
, *statement_program_end
;
552 /* When we construct a partial symbol table entry we only
553 need this much information. */
554 struct partial_die_info
556 /* Offset of this DIE. */
559 /* DWARF-2 tag for this DIE. */
560 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
562 /* Assorted flags describing the data found in this DIE. */
563 unsigned int has_children
: 1;
564 unsigned int is_external
: 1;
565 unsigned int is_declaration
: 1;
566 unsigned int has_type
: 1;
567 unsigned int has_specification
: 1;
568 unsigned int has_pc_info
: 1;
570 /* Flag set if the SCOPE field of this structure has been
572 unsigned int scope_set
: 1;
574 /* Flag set if the DIE has a byte_size attribute. */
575 unsigned int has_byte_size
: 1;
577 /* Flag set if any of the DIE's children are template arguments. */
578 unsigned int has_template_arguments
: 1;
580 /* The name of this DIE. Normally the value of DW_AT_name, but
581 sometimes a default name for unnamed DIEs. */
584 /* The scope to prepend to our children. This is generally
585 allocated on the comp_unit_obstack, so will disappear
586 when this compilation unit leaves the cache. */
589 /* The location description associated with this DIE, if any. */
590 struct dwarf_block
*locdesc
;
592 /* If HAS_PC_INFO, the PC range associated with this DIE. */
596 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
597 DW_AT_sibling, if any. */
600 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
601 DW_AT_specification (or DW_AT_abstract_origin or
603 unsigned int spec_offset
;
605 /* Pointers to this DIE's parent, first child, and next sibling,
607 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
610 /* This data structure holds the information of an abbrev. */
613 unsigned int number
; /* number identifying abbrev */
614 enum dwarf_tag tag
; /* dwarf tag */
615 unsigned short has_children
; /* boolean */
616 unsigned short num_attrs
; /* number of attributes */
617 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
618 struct abbrev_info
*next
; /* next in chain */
623 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
624 ENUM_BITFIELD(dwarf_form
) form
: 16;
627 /* Attributes have a name and a value */
630 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
631 ENUM_BITFIELD(dwarf_form
) form
: 15;
633 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
634 field should be in u.str (existing only for DW_STRING) but it is kept
635 here for better struct attribute alignment. */
636 unsigned int string_is_canonical
: 1;
641 struct dwarf_block
*blk
;
645 struct signatured_type
*signatured_type
;
650 /* This data structure holds a complete die structure. */
653 /* DWARF-2 tag for this DIE. */
654 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
656 /* Number of attributes */
657 unsigned char num_attrs
;
659 /* True if we're presently building the full type name for the
660 type derived from this DIE. */
661 unsigned char building_fullname
: 1;
666 /* Offset in .debug_info or .debug_types section. */
669 /* The dies in a compilation unit form an n-ary tree. PARENT
670 points to this die's parent; CHILD points to the first child of
671 this node; and all the children of a given node are chained
672 together via their SIBLING fields. */
673 struct die_info
*child
; /* Its first child, if any. */
674 struct die_info
*sibling
; /* Its next sibling, if any. */
675 struct die_info
*parent
; /* Its parent, if any. */
677 /* An array of attributes, with NUM_ATTRS elements. There may be
678 zero, but it's not common and zero-sized arrays are not
679 sufficiently portable C. */
680 struct attribute attrs
[1];
683 struct function_range
686 CORE_ADDR lowpc
, highpc
;
688 struct function_range
*next
;
691 /* Get at parts of an attribute structure */
693 #define DW_STRING(attr) ((attr)->u.str)
694 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
695 #define DW_UNSND(attr) ((attr)->u.unsnd)
696 #define DW_BLOCK(attr) ((attr)->u.blk)
697 #define DW_SND(attr) ((attr)->u.snd)
698 #define DW_ADDR(attr) ((attr)->u.addr)
699 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
701 /* Blocks are a bunch of untyped bytes. */
708 #ifndef ATTR_ALLOC_CHUNK
709 #define ATTR_ALLOC_CHUNK 4
712 /* Allocate fields for structs, unions and enums in this size. */
713 #ifndef DW_FIELD_ALLOC_CHUNK
714 #define DW_FIELD_ALLOC_CHUNK 4
717 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
718 but this would require a corresponding change in unpack_field_as_long
720 static int bits_per_byte
= 8;
722 /* The routines that read and process dies for a C struct or C++ class
723 pass lists of data member fields and lists of member function fields
724 in an instance of a field_info structure, as defined below. */
727 /* List of data member and baseclasses fields. */
730 struct nextfield
*next
;
735 *fields
, *baseclasses
;
737 /* Number of fields (including baseclasses). */
740 /* Number of baseclasses. */
743 /* Set if the accesibility of one of the fields is not public. */
744 int non_public_fields
;
746 /* Member function fields array, entries are allocated in the order they
747 are encountered in the object file. */
750 struct nextfnfield
*next
;
751 struct fn_field fnfield
;
755 /* Member function fieldlist array, contains name of possibly overloaded
756 member function, number of overloaded member functions and a pointer
757 to the head of the member function field chain. */
762 struct nextfnfield
*head
;
766 /* Number of entries in the fnfieldlists array. */
769 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
770 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
771 struct typedef_field_list
773 struct typedef_field field
;
774 struct typedef_field_list
*next
;
777 unsigned typedef_field_list_count
;
780 /* One item on the queue of compilation units to read in full symbols
782 struct dwarf2_queue_item
784 struct dwarf2_per_cu_data
*per_cu
;
785 struct dwarf2_queue_item
*next
;
788 /* The current queue. */
789 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
791 /* Loaded secondary compilation units are kept in memory until they
792 have not been referenced for the processing of this many
793 compilation units. Set this to zero to disable caching. Cache
794 sizes of up to at least twenty will improve startup time for
795 typical inter-CU-reference binaries, at an obvious memory cost. */
796 static int dwarf2_max_cache_age
= 5;
798 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
799 struct cmd_list_element
*c
, const char *value
)
801 fprintf_filtered (file
, _("\
802 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
807 /* Various complaints about symbol reading that don't abort the process */
810 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
812 complaint (&symfile_complaints
,
813 _("statement list doesn't fit in .debug_line section"));
817 dwarf2_debug_line_missing_file_complaint (void)
819 complaint (&symfile_complaints
,
820 _(".debug_line section has line data without a file"));
824 dwarf2_debug_line_missing_end_sequence_complaint (void)
826 complaint (&symfile_complaints
,
827 _(".debug_line section has line program sequence without an end"));
831 dwarf2_complex_location_expr_complaint (void)
833 complaint (&symfile_complaints
, _("location expression too complex"));
837 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
840 complaint (&symfile_complaints
,
841 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
846 dwarf2_macros_too_long_complaint (void)
848 complaint (&symfile_complaints
,
849 _("macro info runs off end of `.debug_macinfo' section"));
853 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
855 complaint (&symfile_complaints
,
856 _("macro debug info contains a malformed macro definition:\n`%s'"),
861 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
863 complaint (&symfile_complaints
,
864 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
867 /* local function prototypes */
869 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
871 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
874 static void dwarf2_build_psymtabs_hard (struct objfile
*);
876 static void scan_partial_symbols (struct partial_die_info
*,
877 CORE_ADDR
*, CORE_ADDR
*,
878 int, struct dwarf2_cu
*);
880 static void add_partial_symbol (struct partial_die_info
*,
883 static void add_partial_namespace (struct partial_die_info
*pdi
,
884 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
885 int need_pc
, struct dwarf2_cu
*cu
);
887 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
888 CORE_ADDR
*highpc
, int need_pc
,
889 struct dwarf2_cu
*cu
);
891 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
892 struct dwarf2_cu
*cu
);
894 static void add_partial_subprogram (struct partial_die_info
*pdi
,
895 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
896 int need_pc
, struct dwarf2_cu
*cu
);
898 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
899 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
900 bfd
*abfd
, struct dwarf2_cu
*cu
);
902 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
904 static void psymtab_to_symtab_1 (struct partial_symtab
*);
906 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
908 static void dwarf2_free_abbrev_table (void *);
910 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
913 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
916 static struct partial_die_info
*load_partial_dies (bfd
*,
917 gdb_byte
*, gdb_byte
*,
918 int, struct dwarf2_cu
*);
920 static gdb_byte
*read_partial_die (struct partial_die_info
*,
921 struct abbrev_info
*abbrev
,
923 gdb_byte
*, gdb_byte
*,
926 static struct partial_die_info
*find_partial_die (unsigned int,
929 static void fixup_partial_die (struct partial_die_info
*,
932 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
933 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
935 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
936 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
938 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
940 static int read_1_signed_byte (bfd
*, gdb_byte
*);
942 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
944 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
946 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
948 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
951 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
953 static LONGEST read_checked_initial_length_and_offset
954 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
955 unsigned int *, unsigned int *);
957 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
960 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
962 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
964 static char *read_direct_string (bfd
*, gdb_byte
*, unsigned int *);
966 static char *read_indirect_string (bfd
*, gdb_byte
*,
967 const struct comp_unit_head
*,
970 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
972 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
974 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
976 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
978 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
981 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
985 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
986 struct dwarf2_cu
*cu
);
988 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
990 static struct die_info
*die_specification (struct die_info
*die
,
991 struct dwarf2_cu
**);
993 static void free_line_header (struct line_header
*lh
);
995 static void add_file_name (struct line_header
*, char *, unsigned int,
996 unsigned int, unsigned int);
998 static struct line_header
*(dwarf_decode_line_header
999 (unsigned int offset
,
1000 bfd
*abfd
, struct dwarf2_cu
*cu
));
1002 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
1003 struct dwarf2_cu
*, struct partial_symtab
*);
1005 static void dwarf2_start_subfile (char *, char *, char *);
1007 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1008 struct dwarf2_cu
*);
1010 static struct symbol
*new_symbol_full (struct die_info
*, struct type
*,
1011 struct dwarf2_cu
*, struct symbol
*);
1013 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
1014 struct dwarf2_cu
*);
1016 static void dwarf2_const_value_attr (struct attribute
*attr
,
1019 struct obstack
*obstack
,
1020 struct dwarf2_cu
*cu
, long *value
,
1022 struct dwarf2_locexpr_baton
**baton
);
1024 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1026 static int need_gnat_info (struct dwarf2_cu
*);
1028 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
1030 static void set_descriptive_type (struct type
*, struct die_info
*,
1031 struct dwarf2_cu
*);
1033 static struct type
*die_containing_type (struct die_info
*,
1034 struct dwarf2_cu
*);
1036 static struct type
*lookup_die_type (struct die_info
*, struct attribute
*,
1037 struct dwarf2_cu
*);
1039 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1041 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1043 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1045 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1046 const char *suffix
, int physname
,
1047 struct dwarf2_cu
*cu
);
1049 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1051 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1053 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1055 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1057 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1058 struct dwarf2_cu
*, struct partial_symtab
*);
1060 static int dwarf2_get_pc_bounds (struct die_info
*,
1061 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
1062 struct partial_symtab
*);
1064 static void get_scope_pc_bounds (struct die_info
*,
1065 CORE_ADDR
*, CORE_ADDR
*,
1066 struct dwarf2_cu
*);
1068 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1069 CORE_ADDR
, struct dwarf2_cu
*);
1071 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1072 struct dwarf2_cu
*);
1074 static void dwarf2_attach_fields_to_type (struct field_info
*,
1075 struct type
*, struct dwarf2_cu
*);
1077 static void dwarf2_add_member_fn (struct field_info
*,
1078 struct die_info
*, struct type
*,
1079 struct dwarf2_cu
*);
1081 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1082 struct type
*, struct dwarf2_cu
*);
1084 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1086 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1088 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1090 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1092 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1094 static struct type
*read_module_type (struct die_info
*die
,
1095 struct dwarf2_cu
*cu
);
1097 static const char *namespace_name (struct die_info
*die
,
1098 int *is_anonymous
, struct dwarf2_cu
*);
1100 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1102 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1104 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1105 struct dwarf2_cu
*);
1107 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1109 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1111 gdb_byte
**new_info_ptr
,
1112 struct die_info
*parent
);
1114 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1116 gdb_byte
**new_info_ptr
,
1117 struct die_info
*parent
);
1119 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1121 gdb_byte
**new_info_ptr
,
1122 struct die_info
*parent
);
1124 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1125 struct die_info
**, gdb_byte
*,
1128 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1130 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1133 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1135 static const char *dwarf2_full_name (char *name
,
1136 struct die_info
*die
,
1137 struct dwarf2_cu
*cu
);
1139 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1140 struct dwarf2_cu
**);
1142 static char *dwarf_tag_name (unsigned int);
1144 static char *dwarf_attr_name (unsigned int);
1146 static char *dwarf_form_name (unsigned int);
1148 static char *dwarf_bool_name (unsigned int);
1150 static char *dwarf_type_encoding_name (unsigned int);
1153 static char *dwarf_cfi_name (unsigned int);
1156 static struct die_info
*sibling_die (struct die_info
*);
1158 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1160 static void dump_die_for_error (struct die_info
*);
1162 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1165 /*static*/ void dump_die (struct die_info
*, int max_level
);
1167 static void store_in_ref_table (struct die_info
*,
1168 struct dwarf2_cu
*);
1170 static int is_ref_attr (struct attribute
*);
1172 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1174 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1176 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1178 struct dwarf2_cu
**);
1180 static struct die_info
*follow_die_ref (struct die_info
*,
1182 struct dwarf2_cu
**);
1184 static struct die_info
*follow_die_sig (struct die_info
*,
1186 struct dwarf2_cu
**);
1188 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1189 unsigned int offset
);
1191 static void read_signatured_type (struct objfile
*,
1192 struct signatured_type
*type_sig
);
1194 /* memory allocation interface */
1196 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1198 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1200 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1202 static void initialize_cu_func_list (struct dwarf2_cu
*);
1204 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1205 struct dwarf2_cu
*);
1207 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1208 char *, bfd
*, struct dwarf2_cu
*);
1210 static int attr_form_is_block (struct attribute
*);
1212 static int attr_form_is_section_offset (struct attribute
*);
1214 static int attr_form_is_constant (struct attribute
*);
1216 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1218 struct dwarf2_cu
*cu
);
1220 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1221 struct abbrev_info
*abbrev
,
1222 struct dwarf2_cu
*cu
);
1224 static void free_stack_comp_unit (void *);
1226 static hashval_t
partial_die_hash (const void *item
);
1228 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1230 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1231 (unsigned int offset
, struct objfile
*objfile
);
1233 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1234 (unsigned int offset
, struct objfile
*objfile
);
1236 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1238 static void free_one_comp_unit (void *);
1240 static void free_cached_comp_units (void *);
1242 static void age_cached_comp_units (void);
1244 static void free_one_cached_comp_unit (void *);
1246 static struct type
*set_die_type (struct die_info
*, struct type
*,
1247 struct dwarf2_cu
*);
1249 static void create_all_comp_units (struct objfile
*);
1251 static int create_debug_types_hash_table (struct objfile
*objfile
);
1253 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1256 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1258 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1259 struct dwarf2_per_cu_data
*);
1261 static void dwarf2_mark (struct dwarf2_cu
*);
1263 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1265 static struct type
*get_die_type_at_offset (unsigned int,
1266 struct dwarf2_per_cu_data
*per_cu
);
1268 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1270 static void dwarf2_release_queue (void *dummy
);
1272 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1273 struct objfile
*objfile
);
1275 static void process_queue (struct objfile
*objfile
);
1277 static void find_file_and_directory (struct die_info
*die
,
1278 struct dwarf2_cu
*cu
,
1279 char **name
, char **comp_dir
);
1281 static char *file_full_name (int file
, struct line_header
*lh
,
1282 const char *comp_dir
);
1284 static gdb_byte
*partial_read_comp_unit_head (struct comp_unit_head
*header
,
1287 unsigned int buffer_size
,
1290 static void init_cu_die_reader (struct die_reader_specs
*reader
,
1291 struct dwarf2_cu
*cu
);
1293 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1297 /* Convert VALUE between big- and little-endian. */
1299 byte_swap (offset_type value
)
1303 result
= (value
& 0xff) << 24;
1304 result
|= (value
& 0xff00) << 8;
1305 result
|= (value
& 0xff0000) >> 8;
1306 result
|= (value
& 0xff000000) >> 24;
1310 #define MAYBE_SWAP(V) byte_swap (V)
1313 #define MAYBE_SWAP(V) (V)
1314 #endif /* WORDS_BIGENDIAN */
1316 /* The suffix for an index file. */
1317 #define INDEX_SUFFIX ".gdb-index"
1319 static const char *dwarf2_physname (char *name
, struct die_info
*die
,
1320 struct dwarf2_cu
*cu
);
1322 /* Try to locate the sections we need for DWARF 2 debugging
1323 information and return true if we have enough to do something. */
1326 dwarf2_has_info (struct objfile
*objfile
)
1328 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1329 if (!dwarf2_per_objfile
)
1331 /* Initialize per-objfile state. */
1332 struct dwarf2_per_objfile
*data
1333 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1335 memset (data
, 0, sizeof (*data
));
1336 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1337 dwarf2_per_objfile
= data
;
1339 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1340 dwarf2_per_objfile
->objfile
= objfile
;
1342 return (dwarf2_per_objfile
->info
.asection
!= NULL
1343 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1346 /* When loading sections, we can either look for ".<name>", or for
1347 * ".z<name>", which indicates a compressed section. */
1350 section_is_p (const char *section_name
, const char *name
)
1352 return (section_name
[0] == '.'
1353 && (strcmp (section_name
+ 1, name
) == 0
1354 || (section_name
[1] == 'z'
1355 && strcmp (section_name
+ 2, name
) == 0)));
1358 /* This function is mapped across the sections and remembers the
1359 offset and size of each of the debugging sections we are interested
1363 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1365 if (section_is_p (sectp
->name
, INFO_SECTION
))
1367 dwarf2_per_objfile
->info
.asection
= sectp
;
1368 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1370 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1372 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1373 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1375 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1377 dwarf2_per_objfile
->line
.asection
= sectp
;
1378 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1380 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1382 dwarf2_per_objfile
->loc
.asection
= sectp
;
1383 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1385 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1387 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1388 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1390 else if (section_is_p (sectp
->name
, STR_SECTION
))
1392 dwarf2_per_objfile
->str
.asection
= sectp
;
1393 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1395 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1397 dwarf2_per_objfile
->frame
.asection
= sectp
;
1398 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1400 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1402 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1404 if (aflag
& SEC_HAS_CONTENTS
)
1406 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1407 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1410 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1412 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1413 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1415 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1417 dwarf2_per_objfile
->types
.asection
= sectp
;
1418 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1420 else if (section_is_p (sectp
->name
, GDB_INDEX_SECTION
))
1422 dwarf2_per_objfile
->gdb_index
.asection
= sectp
;
1423 dwarf2_per_objfile
->gdb_index
.size
= bfd_get_section_size (sectp
);
1426 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1427 && bfd_section_vma (abfd
, sectp
) == 0)
1428 dwarf2_per_objfile
->has_section_at_zero
= 1;
1431 /* Decompress a section that was compressed using zlib. Store the
1432 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1435 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1436 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1438 bfd
*abfd
= objfile
->obfd
;
1440 error (_("Support for zlib-compressed DWARF data (from '%s') "
1441 "is disabled in this copy of GDB"),
1442 bfd_get_filename (abfd
));
1444 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1445 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1446 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1447 bfd_size_type uncompressed_size
;
1448 gdb_byte
*uncompressed_buffer
;
1451 int header_size
= 12;
1453 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1454 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1455 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1456 bfd_get_filename (abfd
));
1458 /* Read the zlib header. In this case, it should be "ZLIB" followed
1459 by the uncompressed section size, 8 bytes in big-endian order. */
1460 if (compressed_size
< header_size
1461 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1462 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1463 bfd_get_filename (abfd
));
1464 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1465 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1466 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1467 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1468 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1469 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1470 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1471 uncompressed_size
+= compressed_buffer
[11];
1473 /* It is possible the section consists of several compressed
1474 buffers concatenated together, so we uncompress in a loop. */
1478 strm
.avail_in
= compressed_size
- header_size
;
1479 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1480 strm
.avail_out
= uncompressed_size
;
1481 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1483 rc
= inflateInit (&strm
);
1484 while (strm
.avail_in
> 0)
1487 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1488 bfd_get_filename (abfd
), rc
);
1489 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1490 + (uncompressed_size
- strm
.avail_out
));
1491 rc
= inflate (&strm
, Z_FINISH
);
1492 if (rc
!= Z_STREAM_END
)
1493 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1494 bfd_get_filename (abfd
), rc
);
1495 rc
= inflateReset (&strm
);
1497 rc
= inflateEnd (&strm
);
1499 || strm
.avail_out
!= 0)
1500 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1501 bfd_get_filename (abfd
), rc
);
1503 do_cleanups (cleanup
);
1504 *outbuf
= uncompressed_buffer
;
1505 *outsize
= uncompressed_size
;
1509 /* Read the contents of the section SECTP from object file specified by
1510 OBJFILE, store info about the section into INFO.
1511 If the section is compressed, uncompress it before returning. */
1514 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1516 bfd
*abfd
= objfile
->obfd
;
1517 asection
*sectp
= info
->asection
;
1518 gdb_byte
*buf
, *retbuf
;
1519 unsigned char header
[4];
1523 info
->buffer
= NULL
;
1524 info
->was_mmapped
= 0;
1527 if (info
->asection
== NULL
|| info
->size
== 0)
1530 /* Check if the file has a 4-byte header indicating compression. */
1531 if (info
->size
> sizeof (header
)
1532 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1533 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1535 /* Upon decompression, update the buffer and its size. */
1536 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1538 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1546 pagesize
= getpagesize ();
1548 /* Only try to mmap sections which are large enough: we don't want to
1549 waste space due to fragmentation. Also, only try mmap for sections
1550 without relocations. */
1552 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1554 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1555 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1556 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1557 MAP_PRIVATE
, pg_offset
);
1559 if (retbuf
!= MAP_FAILED
)
1561 info
->was_mmapped
= 1;
1562 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1563 #if HAVE_POSIX_MADVISE
1564 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1571 /* If we get here, we are a normal, not-compressed section. */
1573 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1575 /* When debugging .o files, we may need to apply relocations; see
1576 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1577 We never compress sections in .o files, so we only need to
1578 try this when the section is not compressed. */
1579 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1582 info
->buffer
= retbuf
;
1586 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1587 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1588 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1589 bfd_get_filename (abfd
));
1592 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1596 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1597 asection
**sectp
, gdb_byte
**bufp
,
1598 bfd_size_type
*sizep
)
1600 struct dwarf2_per_objfile
*data
1601 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1602 struct dwarf2_section_info
*info
;
1604 /* We may see an objfile without any DWARF, in which case we just
1613 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1614 info
= &data
->eh_frame
;
1615 else if (section_is_p (section_name
, FRAME_SECTION
))
1616 info
= &data
->frame
;
1618 gdb_assert_not_reached ("unexpected section");
1620 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1621 /* We haven't read this section in yet. Do it now. */
1622 dwarf2_read_section (objfile
, info
);
1624 *sectp
= info
->asection
;
1625 *bufp
= info
->buffer
;
1626 *sizep
= info
->size
;
1631 /* Read in the symbols for PER_CU. OBJFILE is the objfile from which
1634 dw2_do_instantiate_symtab (struct objfile
*objfile
,
1635 struct dwarf2_per_cu_data
*per_cu
)
1637 struct cleanup
*back_to
;
1639 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
1641 queue_comp_unit (per_cu
, objfile
);
1643 if (per_cu
->from_debug_types
)
1644 read_signatured_type_at_offset (objfile
, per_cu
->offset
);
1646 load_full_comp_unit (per_cu
, objfile
);
1648 process_queue (objfile
);
1650 /* Age the cache, releasing compilation units that have not
1651 been used recently. */
1652 age_cached_comp_units ();
1654 do_cleanups (back_to
);
1657 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
1658 the objfile from which this CU came. Returns the resulting symbol
1660 static struct symtab
*
1661 dw2_instantiate_symtab (struct objfile
*objfile
,
1662 struct dwarf2_per_cu_data
*per_cu
)
1664 if (!per_cu
->v
.quick
->symtab
)
1666 struct cleanup
*back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1667 increment_reading_symtab ();
1668 dw2_do_instantiate_symtab (objfile
, per_cu
);
1669 do_cleanups (back_to
);
1671 return per_cu
->v
.quick
->symtab
;
1674 /* Return the CU given its index. */
1675 static struct dwarf2_per_cu_data
*
1676 dw2_get_cu (int index
)
1678 if (index
>= dwarf2_per_objfile
->n_comp_units
)
1680 index
-= dwarf2_per_objfile
->n_comp_units
;
1681 return dwarf2_per_objfile
->type_comp_units
[index
];
1683 return dwarf2_per_objfile
->all_comp_units
[index
];
1686 /* A helper function that knows how to read a 64-bit value in a way
1687 that doesn't make gdb die. Returns 1 if the conversion went ok, 0
1690 extract_cu_value (const char *bytes
, ULONGEST
*result
)
1692 if (sizeof (ULONGEST
) < 8)
1696 /* Ignore the upper 4 bytes if they are all zero. */
1697 for (i
= 0; i
< 4; ++i
)
1698 if (bytes
[i
+ 4] != 0)
1701 *result
= extract_unsigned_integer (bytes
, 4, BFD_ENDIAN_LITTLE
);
1704 *result
= extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
1708 /* Read the CU list from the mapped index, and use it to create all
1709 the CU objects for this objfile. Return 0 if something went wrong,
1710 1 if everything went ok. */
1712 create_cus_from_index (struct objfile
*objfile
, const gdb_byte
*cu_list
,
1713 offset_type cu_list_elements
)
1717 dwarf2_per_objfile
->n_comp_units
= cu_list_elements
/ 2;
1718 dwarf2_per_objfile
->all_comp_units
1719 = obstack_alloc (&objfile
->objfile_obstack
,
1720 dwarf2_per_objfile
->n_comp_units
1721 * sizeof (struct dwarf2_per_cu_data
*));
1723 for (i
= 0; i
< cu_list_elements
; i
+= 2)
1725 struct dwarf2_per_cu_data
*the_cu
;
1726 ULONGEST offset
, length
;
1728 if (!extract_cu_value (cu_list
, &offset
)
1729 || !extract_cu_value (cu_list
+ 8, &length
))
1733 the_cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1734 struct dwarf2_per_cu_data
);
1735 the_cu
->offset
= offset
;
1736 the_cu
->length
= length
;
1737 the_cu
->objfile
= objfile
;
1738 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1739 struct dwarf2_per_cu_quick_data
);
1740 dwarf2_per_objfile
->all_comp_units
[i
/ 2] = the_cu
;
1746 /* Create the signatured type hash table from the index. */
1749 create_signatured_type_table_from_index (struct objfile
*objfile
,
1750 const gdb_byte
*bytes
,
1751 offset_type elements
)
1754 htab_t sig_types_hash
;
1756 dwarf2_per_objfile
->n_type_comp_units
= elements
/ 3;
1757 dwarf2_per_objfile
->type_comp_units
1758 = obstack_alloc (&objfile
->objfile_obstack
,
1759 dwarf2_per_objfile
->n_type_comp_units
1760 * sizeof (struct dwarf2_per_cu_data
*));
1762 sig_types_hash
= allocate_signatured_type_table (objfile
);
1764 for (i
= 0; i
< elements
; i
+= 3)
1766 struct signatured_type
*type_sig
;
1767 ULONGEST offset
, type_offset
, signature
;
1770 if (!extract_cu_value (bytes
, &offset
)
1771 || !extract_cu_value (bytes
+ 8, &type_offset
))
1773 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
1776 type_sig
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1777 struct signatured_type
);
1778 type_sig
->signature
= signature
;
1779 type_sig
->offset
= offset
;
1780 type_sig
->type_offset
= type_offset
;
1781 type_sig
->per_cu
.from_debug_types
= 1;
1782 type_sig
->per_cu
.offset
= offset
;
1783 type_sig
->per_cu
.objfile
= objfile
;
1784 type_sig
->per_cu
.v
.quick
1785 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
1786 struct dwarf2_per_cu_quick_data
);
1788 slot
= htab_find_slot (sig_types_hash
, type_sig
, INSERT
);
1791 dwarf2_per_objfile
->type_comp_units
[i
/ 3] = &type_sig
->per_cu
;
1794 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
1799 /* Read the address map data from the mapped index, and use it to
1800 populate the objfile's psymtabs_addrmap. */
1802 create_addrmap_from_index (struct objfile
*objfile
, struct mapped_index
*index
)
1804 const gdb_byte
*iter
, *end
;
1805 struct obstack temp_obstack
;
1806 struct addrmap
*mutable_map
;
1807 struct cleanup
*cleanup
;
1810 obstack_init (&temp_obstack
);
1811 cleanup
= make_cleanup_obstack_free (&temp_obstack
);
1812 mutable_map
= addrmap_create_mutable (&temp_obstack
);
1814 iter
= index
->address_table
;
1815 end
= iter
+ index
->address_table_size
;
1817 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1821 ULONGEST hi
, lo
, cu_index
;
1822 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1824 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
1826 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
1829 addrmap_set_empty (mutable_map
, lo
+ baseaddr
, hi
+ baseaddr
- 1,
1830 dw2_get_cu (cu_index
));
1833 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
1834 &objfile
->objfile_obstack
);
1835 do_cleanups (cleanup
);
1838 /* The hash function for strings in the mapped index. This is the
1839 same as the hashtab.c hash function, but we keep a separate copy to
1840 maintain control over the implementation. This is necessary
1841 because the hash function is tied to the format of the mapped index
1844 mapped_index_string_hash (const void *p
)
1846 const unsigned char *str
= (const unsigned char *) p
;
1850 while ((c
= *str
++) != 0)
1851 r
= r
* 67 + c
- 113;
1856 /* Find a slot in the mapped index INDEX for the object named NAME.
1857 If NAME is found, set *VEC_OUT to point to the CU vector in the
1858 constant pool and return 1. If NAME cannot be found, return 0. */
1860 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
1861 offset_type
**vec_out
)
1863 offset_type hash
= mapped_index_string_hash (name
);
1864 offset_type slot
, step
;
1866 slot
= hash
& (index
->index_table_slots
- 1);
1867 step
= ((hash
* 17) & (index
->index_table_slots
- 1)) | 1;
1871 /* Convert a slot number to an offset into the table. */
1872 offset_type i
= 2 * slot
;
1874 if (index
->index_table
[i
] == 0 && index
->index_table
[i
+ 1] == 0)
1877 str
= index
->constant_pool
+ MAYBE_SWAP (index
->index_table
[i
]);
1878 if (!strcmp (name
, str
))
1880 *vec_out
= (offset_type
*) (index
->constant_pool
1881 + MAYBE_SWAP (index
->index_table
[i
+ 1]));
1885 slot
= (slot
+ step
) & (index
->index_table_slots
- 1);
1889 /* Read the index file. If everything went ok, initialize the "quick"
1890 elements of all the CUs and return 1. Otherwise, return 0. */
1892 dwarf2_read_index (struct objfile
*objfile
)
1895 struct mapped_index
*map
;
1896 offset_type
*metadata
;
1897 const gdb_byte
*cu_list
;
1898 const gdb_byte
*types_list
= NULL
;
1899 offset_type version
, cu_list_elements
;
1900 offset_type types_list_elements
= 0;
1903 if (dwarf2_per_objfile
->gdb_index
.asection
== NULL
1904 || dwarf2_per_objfile
->gdb_index
.size
== 0)
1907 /* Older elfutils strip versions could keep the section in the main
1908 executable while splitting it for the separate debug info file. */
1909 if ((bfd_get_file_flags (dwarf2_per_objfile
->gdb_index
.asection
)
1910 & SEC_HAS_CONTENTS
) == 0)
1913 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->gdb_index
);
1915 addr
= dwarf2_per_objfile
->gdb_index
.buffer
;
1916 /* Version check. */
1917 version
= MAYBE_SWAP (*(offset_type
*) addr
);
1918 /* Versions earlier than 3 emitted every copy of a psymbol. This
1919 causes the index to behave very poorly for certain requests. So,
1920 it seems better to just ignore such indices. */
1924 map
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct mapped_index
);
1925 map
->total_size
= dwarf2_per_objfile
->gdb_index
.size
;
1927 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
1930 cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1931 cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
1935 types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
1936 types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
1937 - MAYBE_SWAP (metadata
[i
]))
1941 map
->address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
1942 map
->address_table_size
= (MAYBE_SWAP (metadata
[i
+ 1])
1943 - MAYBE_SWAP (metadata
[i
]));
1946 map
->index_table
= (offset_type
*) (addr
+ MAYBE_SWAP (metadata
[i
]));
1947 map
->index_table_slots
= ((MAYBE_SWAP (metadata
[i
+ 1])
1948 - MAYBE_SWAP (metadata
[i
]))
1949 / (2 * sizeof (offset_type
)));
1952 map
->constant_pool
= addr
+ MAYBE_SWAP (metadata
[i
]);
1954 if (!create_cus_from_index (objfile
, cu_list
, cu_list_elements
))
1957 if (types_list_elements
1958 && !create_signatured_type_table_from_index (objfile
, types_list
,
1959 types_list_elements
))
1962 create_addrmap_from_index (objfile
, map
);
1964 dwarf2_per_objfile
->index_table
= map
;
1965 dwarf2_per_objfile
->using_index
= 1;
1970 /* A helper for the "quick" functions which sets the global
1971 dwarf2_per_objfile according to OBJFILE. */
1973 dw2_setup (struct objfile
*objfile
)
1975 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1976 gdb_assert (dwarf2_per_objfile
);
1979 /* A helper for the "quick" functions which attempts to read the line
1980 table for THIS_CU. */
1982 dw2_require_line_header (struct objfile
*objfile
,
1983 struct dwarf2_per_cu_data
*this_cu
)
1985 bfd
*abfd
= objfile
->obfd
;
1986 struct line_header
*lh
= NULL
;
1987 struct attribute
*attr
;
1988 struct cleanup
*cleanups
;
1989 struct die_info
*comp_unit_die
;
1990 struct dwarf2_section_info
* sec
;
1991 gdb_byte
*beg_of_comp_unit
, *info_ptr
, *buffer
;
1992 int has_children
, i
;
1993 struct dwarf2_cu cu
;
1994 unsigned int bytes_read
, buffer_size
;
1995 struct die_reader_specs reader_specs
;
1996 char *name
, *comp_dir
;
1998 if (this_cu
->v
.quick
->read_lines
)
2000 this_cu
->v
.quick
->read_lines
= 1;
2002 memset (&cu
, 0, sizeof (cu
));
2003 cu
.objfile
= objfile
;
2004 obstack_init (&cu
.comp_unit_obstack
);
2006 cleanups
= make_cleanup (free_stack_comp_unit
, &cu
);
2008 if (this_cu
->from_debug_types
)
2009 sec
= &dwarf2_per_objfile
->types
;
2011 sec
= &dwarf2_per_objfile
->info
;
2012 dwarf2_read_section (objfile
, sec
);
2013 buffer_size
= sec
->size
;
2014 buffer
= sec
->buffer
;
2015 info_ptr
= buffer
+ this_cu
->offset
;
2016 beg_of_comp_unit
= info_ptr
;
2018 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
2019 buffer
, buffer_size
,
2022 /* Complete the cu_header. */
2023 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
2024 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2027 cu
.per_cu
= this_cu
;
2029 dwarf2_read_abbrevs (abfd
, &cu
);
2030 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
2032 if (this_cu
->from_debug_types
)
2033 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
2034 init_cu_die_reader (&reader_specs
, &cu
);
2035 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2038 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, &cu
);
2041 unsigned int line_offset
= DW_UNSND (attr
);
2042 lh
= dwarf_decode_line_header (line_offset
, abfd
, &cu
);
2046 do_cleanups (cleanups
);
2050 find_file_and_directory (comp_unit_die
, &cu
, &name
, &comp_dir
);
2052 this_cu
->v
.quick
->lines
= lh
;
2054 this_cu
->v
.quick
->file_names
2055 = obstack_alloc (&objfile
->objfile_obstack
,
2056 lh
->num_file_names
* sizeof (char *));
2057 for (i
= 0; i
< lh
->num_file_names
; ++i
)
2058 this_cu
->v
.quick
->file_names
[i
] = file_full_name (i
+ 1, lh
, comp_dir
);
2060 do_cleanups (cleanups
);
2063 /* A helper for the "quick" functions which computes and caches the
2064 real path for a given file name from the line table.
2065 dw2_require_line_header must have been called before this is
2068 dw2_require_full_path (struct objfile
*objfile
,
2069 struct dwarf2_per_cu_data
*per_cu
,
2072 if (!per_cu
->v
.quick
->full_names
)
2073 per_cu
->v
.quick
->full_names
2074 = OBSTACK_CALLOC (&objfile
->objfile_obstack
,
2075 per_cu
->v
.quick
->lines
->num_file_names
,
2078 if (!per_cu
->v
.quick
->full_names
[index
])
2079 per_cu
->v
.quick
->full_names
[index
]
2080 = gdb_realpath (per_cu
->v
.quick
->file_names
[index
]);
2082 return per_cu
->v
.quick
->full_names
[index
];
2085 static struct symtab
*
2086 dw2_find_last_source_symtab (struct objfile
*objfile
)
2089 dw2_setup (objfile
);
2090 index
= dwarf2_per_objfile
->n_comp_units
- 1;
2091 return dw2_instantiate_symtab (objfile
, dw2_get_cu (index
));
2095 dw2_forget_cached_source_info (struct objfile
*objfile
)
2099 dw2_setup (objfile
);
2100 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2101 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2103 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2105 if (per_cu
->v
.quick
->full_names
)
2109 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2110 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
2116 dw2_lookup_symtab (struct objfile
*objfile
, const char *name
,
2117 const char *full_path
, const char *real_path
,
2118 struct symtab
**result
)
2121 int check_basename
= lbasename (name
) == name
;
2122 struct dwarf2_per_cu_data
*base_cu
= NULL
;
2124 dw2_setup (objfile
);
2125 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2126 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2129 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2131 if (per_cu
->v
.quick
->symtab
)
2134 dw2_require_line_header (objfile
, per_cu
);
2135 if (!per_cu
->v
.quick
->lines
)
2138 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2140 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2142 if (FILENAME_CMP (name
, this_name
) == 0)
2144 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2148 if (check_basename
&& ! base_cu
2149 && FILENAME_CMP (lbasename (this_name
), name
) == 0)
2152 if (full_path
!= NULL
)
2154 const char *this_full_name
= dw2_require_full_path (objfile
,
2158 && FILENAME_CMP (full_path
, this_full_name
) == 0)
2160 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2165 if (real_path
!= NULL
)
2167 const char *this_full_name
= dw2_require_full_path (objfile
,
2170 if (this_full_name
!= NULL
)
2172 char *rp
= gdb_realpath (this_full_name
);
2173 if (rp
!= NULL
&& FILENAME_CMP (real_path
, rp
) == 0)
2176 *result
= dw2_instantiate_symtab (objfile
, per_cu
);
2187 *result
= dw2_instantiate_symtab (objfile
, base_cu
);
2194 static struct symtab
*
2195 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
2196 const char *name
, domain_enum domain
)
2198 /* We do all the work in the pre_expand_symtabs_matching hook
2203 /* A helper function that expands all symtabs that hold an object
2206 dw2_do_expand_symtabs_matching (struct objfile
*objfile
, const char *name
)
2208 dw2_setup (objfile
);
2210 if (dwarf2_per_objfile
->index_table
)
2214 if (find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2217 offset_type i
, len
= MAYBE_SWAP (*vec
);
2218 for (i
= 0; i
< len
; ++i
)
2220 offset_type cu_index
= MAYBE_SWAP (vec
[i
+ 1]);
2221 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (cu_index
);
2223 dw2_instantiate_symtab (objfile
, per_cu
);
2230 dw2_pre_expand_symtabs_matching (struct objfile
*objfile
,
2231 int kind
, const char *name
,
2234 dw2_do_expand_symtabs_matching (objfile
, name
);
2238 dw2_print_stats (struct objfile
*objfile
)
2242 dw2_setup (objfile
);
2244 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2245 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2247 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2249 if (!per_cu
->v
.quick
->symtab
)
2252 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
2256 dw2_dump (struct objfile
*objfile
)
2258 /* Nothing worth printing. */
2262 dw2_relocate (struct objfile
*objfile
, struct section_offsets
*new_offsets
,
2263 struct section_offsets
*delta
)
2265 /* There's nothing to relocate here. */
2269 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
2270 const char *func_name
)
2272 dw2_do_expand_symtabs_matching (objfile
, func_name
);
2276 dw2_expand_all_symtabs (struct objfile
*objfile
)
2280 dw2_setup (objfile
);
2282 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2283 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2285 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2287 dw2_instantiate_symtab (objfile
, per_cu
);
2292 dw2_expand_symtabs_with_filename (struct objfile
*objfile
,
2293 const char *filename
)
2297 dw2_setup (objfile
);
2298 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2299 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2302 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2304 if (per_cu
->v
.quick
->symtab
)
2307 dw2_require_line_header (objfile
, per_cu
);
2308 if (!per_cu
->v
.quick
->lines
)
2311 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2313 const char *this_name
= per_cu
->v
.quick
->file_names
[j
];
2314 if (strcmp (this_name
, filename
) == 0)
2316 dw2_instantiate_symtab (objfile
, per_cu
);
2324 dw2_find_symbol_file (struct objfile
*objfile
, const char *name
)
2326 struct dwarf2_per_cu_data
*per_cu
;
2329 dw2_setup (objfile
);
2331 if (!dwarf2_per_objfile
->index_table
)
2334 if (!find_slot_in_mapped_hash (dwarf2_per_objfile
->index_table
,
2338 /* Note that this just looks at the very first one named NAME -- but
2339 actually we are looking for a function. find_main_filename
2340 should be rewritten so that it doesn't require a custom hook. It
2341 could just use the ordinary symbol tables. */
2342 /* vec[0] is the length, which must always be >0. */
2343 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[1]));
2345 dw2_require_line_header (objfile
, per_cu
);
2346 if (!per_cu
->v
.quick
->lines
)
2349 return per_cu
->v
.quick
->file_names
[per_cu
->v
.quick
->lines
->num_file_names
- 1];
2353 dw2_map_ada_symtabs (struct objfile
*objfile
,
2354 int (*wild_match
) (const char *, int, const char *),
2355 int (*is_name_suffix
) (const char *),
2356 void (*callback
) (struct objfile
*,
2357 struct symtab
*, void *),
2358 const char *name
, int global
,
2359 domain_enum
namespace, int wild
,
2362 /* For now, we don't support Ada. Still the function can be called if the
2363 current language is Ada for a non-Ada objfile using GNU index. As Ada
2364 does not look for non-Ada symbols this function should just return. */
2368 dw2_expand_symtabs_matching (struct objfile
*objfile
,
2369 int (*file_matcher
) (const char *, void *),
2370 int (*name_matcher
) (const char *, void *),
2376 struct mapped_index
*index
;
2378 dw2_setup (objfile
);
2379 if (!dwarf2_per_objfile
->index_table
)
2381 index
= dwarf2_per_objfile
->index_table
;
2383 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2384 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2387 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2389 per_cu
->v
.quick
->mark
= 0;
2390 if (per_cu
->v
.quick
->symtab
)
2393 dw2_require_line_header (objfile
, per_cu
);
2394 if (!per_cu
->v
.quick
->lines
)
2397 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2399 if (file_matcher (per_cu
->v
.quick
->file_names
[j
], data
))
2401 per_cu
->v
.quick
->mark
= 1;
2407 for (iter
= 0; iter
< index
->index_table_slots
; ++iter
)
2409 offset_type idx
= 2 * iter
;
2411 offset_type
*vec
, vec_len
, vec_idx
;
2413 if (index
->index_table
[idx
] == 0 && index
->index_table
[idx
+ 1] == 0)
2416 name
= index
->constant_pool
+ MAYBE_SWAP (index
->index_table
[idx
]);
2418 if (! (*name_matcher
) (name
, data
))
2421 /* The name was matched, now expand corresponding CUs that were
2423 vec
= (offset_type
*) (index
->constant_pool
2424 + MAYBE_SWAP (index
->index_table
[idx
+ 1]));
2425 vec_len
= MAYBE_SWAP (vec
[0]);
2426 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
2428 struct dwarf2_per_cu_data
*per_cu
;
2430 per_cu
= dw2_get_cu (MAYBE_SWAP (vec
[vec_idx
+ 1]));
2431 if (per_cu
->v
.quick
->mark
)
2432 dw2_instantiate_symtab (objfile
, per_cu
);
2437 static struct symtab
*
2438 dw2_find_pc_sect_symtab (struct objfile
*objfile
,
2439 struct minimal_symbol
*msymbol
,
2441 struct obj_section
*section
,
2444 struct dwarf2_per_cu_data
*data
;
2446 dw2_setup (objfile
);
2448 if (!objfile
->psymtabs_addrmap
)
2451 data
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
2455 if (warn_if_readin
&& data
->v
.quick
->symtab
)
2456 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
2457 paddress (get_objfile_arch (objfile
), pc
));
2459 return dw2_instantiate_symtab (objfile
, data
);
2463 dw2_map_symbol_names (struct objfile
*objfile
,
2464 void (*fun
) (const char *, void *),
2468 struct mapped_index
*index
;
2470 dw2_setup (objfile
);
2472 if (!dwarf2_per_objfile
->index_table
)
2474 index
= dwarf2_per_objfile
->index_table
;
2476 for (iter
= 0; iter
< index
->index_table_slots
; ++iter
)
2478 offset_type idx
= 2 * iter
;
2480 offset_type
*vec
, vec_len
, vec_idx
;
2482 if (index
->index_table
[idx
] == 0 && index
->index_table
[idx
+ 1] == 0)
2485 name
= (index
->constant_pool
+ MAYBE_SWAP (index
->index_table
[idx
]));
2487 (*fun
) (name
, data
);
2492 dw2_map_symbol_filenames (struct objfile
*objfile
,
2493 void (*fun
) (const char *, const char *, void *),
2498 dw2_setup (objfile
);
2499 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2500 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2503 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2505 if (per_cu
->v
.quick
->symtab
)
2508 dw2_require_line_header (objfile
, per_cu
);
2509 if (!per_cu
->v
.quick
->lines
)
2512 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
2514 const char *this_full_name
= dw2_require_full_path (objfile
, per_cu
,
2516 (*fun
) (per_cu
->v
.quick
->file_names
[j
], this_full_name
, data
);
2522 dw2_has_symbols (struct objfile
*objfile
)
2527 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
2530 dw2_find_last_source_symtab
,
2531 dw2_forget_cached_source_info
,
2534 dw2_pre_expand_symtabs_matching
,
2538 dw2_expand_symtabs_for_function
,
2539 dw2_expand_all_symtabs
,
2540 dw2_expand_symtabs_with_filename
,
2541 dw2_find_symbol_file
,
2542 dw2_map_ada_symtabs
,
2543 dw2_expand_symtabs_matching
,
2544 dw2_find_pc_sect_symtab
,
2545 dw2_map_symbol_names
,
2546 dw2_map_symbol_filenames
2549 /* Initialize for reading DWARF for this objfile. Return 0 if this
2550 file will use psymtabs, or 1 if using the GNU index. */
2553 dwarf2_initialize_objfile (struct objfile
*objfile
)
2555 /* If we're about to read full symbols, don't bother with the
2556 indices. In this case we also don't care if some other debug
2557 format is making psymtabs, because they are all about to be
2559 if ((objfile
->flags
& OBJF_READNOW
))
2563 dwarf2_per_objfile
->using_index
= 1;
2564 create_all_comp_units (objfile
);
2565 create_debug_types_hash_table (objfile
);
2567 for (i
= 0; i
< (dwarf2_per_objfile
->n_comp_units
2568 + dwarf2_per_objfile
->n_type_comp_units
); ++i
)
2570 struct dwarf2_per_cu_data
*per_cu
= dw2_get_cu (i
);
2572 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2573 struct dwarf2_per_cu_quick_data
);
2576 /* Return 1 so that gdb sees the "quick" functions. However,
2577 these functions will be no-ops because we will have expanded
2582 if (dwarf2_read_index (objfile
))
2585 dwarf2_build_psymtabs (objfile
);
2591 /* Build a partial symbol table. */
2594 dwarf2_build_psymtabs (struct objfile
*objfile
)
2596 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2598 init_psymbol_list (objfile
, 1024);
2601 dwarf2_build_psymtabs_hard (objfile
);
2604 /* Return TRUE if OFFSET is within CU_HEADER. */
2607 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
2609 unsigned int bottom
= cu_header
->offset
;
2610 unsigned int top
= (cu_header
->offset
2612 + cu_header
->initial_length_size
);
2614 return (offset
>= bottom
&& offset
< top
);
2617 /* Read in the comp unit header information from the debug_info at info_ptr.
2618 NOTE: This leaves members offset, first_die_offset to be filled in
2622 read_comp_unit_head (struct comp_unit_head
*cu_header
,
2623 gdb_byte
*info_ptr
, bfd
*abfd
)
2626 unsigned int bytes_read
;
2628 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
2629 cu_header
->initial_length_size
= bytes_read
;
2630 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
2631 info_ptr
+= bytes_read
;
2632 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
2634 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
2636 info_ptr
+= bytes_read
;
2637 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
2639 signed_addr
= bfd_get_sign_extend_vma (abfd
);
2640 if (signed_addr
< 0)
2641 internal_error (__FILE__
, __LINE__
,
2642 _("read_comp_unit_head: dwarf from non elf file"));
2643 cu_header
->signed_addr_p
= signed_addr
;
2649 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
2650 gdb_byte
*buffer
, unsigned int buffer_size
,
2653 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2655 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
2657 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
2658 error (_("Dwarf Error: wrong version in compilation unit header "
2659 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
2660 bfd_get_filename (abfd
));
2662 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
2663 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
2664 "(offset 0x%lx + 6) [in module %s]"),
2665 (long) header
->abbrev_offset
,
2666 (long) (beg_of_comp_unit
- buffer
),
2667 bfd_get_filename (abfd
));
2669 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
2670 > buffer
+ buffer_size
)
2671 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
2672 "(offset 0x%lx + 0) [in module %s]"),
2673 (long) header
->length
,
2674 (long) (beg_of_comp_unit
- buffer
),
2675 bfd_get_filename (abfd
));
2680 /* Read in the types comp unit header information from .debug_types entry at
2681 types_ptr. The result is a pointer to one past the end of the header. */
2684 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
2685 ULONGEST
*signature
,
2686 gdb_byte
*types_ptr
, bfd
*abfd
)
2688 gdb_byte
*initial_types_ptr
= types_ptr
;
2690 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
2691 &dwarf2_per_objfile
->types
);
2692 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
2694 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
2696 *signature
= read_8_bytes (abfd
, types_ptr
);
2698 types_ptr
+= cu_header
->offset_size
;
2699 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
2704 /* Allocate a new partial symtab for file named NAME and mark this new
2705 partial symtab as being an include of PST. */
2708 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
2709 struct objfile
*objfile
)
2711 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
2713 subpst
->section_offsets
= pst
->section_offsets
;
2714 subpst
->textlow
= 0;
2715 subpst
->texthigh
= 0;
2717 subpst
->dependencies
= (struct partial_symtab
**)
2718 obstack_alloc (&objfile
->objfile_obstack
,
2719 sizeof (struct partial_symtab
*));
2720 subpst
->dependencies
[0] = pst
;
2721 subpst
->number_of_dependencies
= 1;
2723 subpst
->globals_offset
= 0;
2724 subpst
->n_global_syms
= 0;
2725 subpst
->statics_offset
= 0;
2726 subpst
->n_static_syms
= 0;
2727 subpst
->symtab
= NULL
;
2728 subpst
->read_symtab
= pst
->read_symtab
;
2731 /* No private part is necessary for include psymtabs. This property
2732 can be used to differentiate between such include psymtabs and
2733 the regular ones. */
2734 subpst
->read_symtab_private
= NULL
;
2737 /* Read the Line Number Program data and extract the list of files
2738 included by the source file represented by PST. Build an include
2739 partial symtab for each of these included files. */
2742 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
2743 struct die_info
*die
,
2744 struct partial_symtab
*pst
)
2746 struct objfile
*objfile
= cu
->objfile
;
2747 bfd
*abfd
= objfile
->obfd
;
2748 struct line_header
*lh
= NULL
;
2749 struct attribute
*attr
;
2751 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2754 unsigned int line_offset
= DW_UNSND (attr
);
2756 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2759 return; /* No linetable, so no includes. */
2761 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
2762 dwarf_decode_lines (lh
, pst
->dirname
, abfd
, cu
, pst
);
2764 free_line_header (lh
);
2768 hash_type_signature (const void *item
)
2770 const struct signatured_type
*type_sig
= item
;
2772 /* This drops the top 32 bits of the signature, but is ok for a hash. */
2773 return type_sig
->signature
;
2777 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
2779 const struct signatured_type
*lhs
= item_lhs
;
2780 const struct signatured_type
*rhs
= item_rhs
;
2782 return lhs
->signature
== rhs
->signature
;
2785 /* Allocate a hash table for signatured types. */
2788 allocate_signatured_type_table (struct objfile
*objfile
)
2790 return htab_create_alloc_ex (41,
2791 hash_type_signature
,
2794 &objfile
->objfile_obstack
,
2795 hashtab_obstack_allocate
,
2796 dummy_obstack_deallocate
);
2799 /* A helper function to add a signatured type CU to a list. */
2802 add_signatured_type_cu_to_list (void **slot
, void *datum
)
2804 struct signatured_type
*sigt
= *slot
;
2805 struct dwarf2_per_cu_data
***datap
= datum
;
2807 **datap
= &sigt
->per_cu
;
2813 /* Create the hash table of all entries in the .debug_types section.
2814 The result is zero if there is an error (e.g. missing .debug_types section),
2815 otherwise non-zero. */
2818 create_debug_types_hash_table (struct objfile
*objfile
)
2822 struct dwarf2_per_cu_data
**iter
;
2824 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
2825 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
2827 if (info_ptr
== NULL
)
2829 dwarf2_per_objfile
->signatured_types
= NULL
;
2833 types_htab
= allocate_signatured_type_table (objfile
);
2835 if (dwarf2_die_debug
)
2836 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
2838 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2840 unsigned int offset
;
2841 unsigned int offset_size
;
2842 unsigned int type_offset
;
2843 unsigned int length
, initial_length_size
;
2844 unsigned short version
;
2846 struct signatured_type
*type_sig
;
2848 gdb_byte
*ptr
= info_ptr
;
2850 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
2852 /* We need to read the type's signature in order to build the hash
2853 table, but we don't need to read anything else just yet. */
2855 /* Sanity check to ensure entire cu is present. */
2856 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
2857 if (ptr
+ length
+ initial_length_size
2858 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
2860 complaint (&symfile_complaints
,
2861 _("debug type entry runs off end of `.debug_types' section, ignored"));
2865 offset_size
= initial_length_size
== 4 ? 4 : 8;
2866 ptr
+= initial_length_size
;
2867 version
= bfd_get_16 (objfile
->obfd
, ptr
);
2869 ptr
+= offset_size
; /* abbrev offset */
2870 ptr
+= 1; /* address size */
2871 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
2873 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
2875 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
2876 memset (type_sig
, 0, sizeof (*type_sig
));
2877 type_sig
->signature
= signature
;
2878 type_sig
->offset
= offset
;
2879 type_sig
->type_offset
= type_offset
;
2880 type_sig
->per_cu
.objfile
= objfile
;
2881 type_sig
->per_cu
.from_debug_types
= 1;
2883 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
2884 gdb_assert (slot
!= NULL
);
2887 if (dwarf2_die_debug
)
2888 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
2889 offset
, phex (signature
, sizeof (signature
)));
2891 info_ptr
= info_ptr
+ initial_length_size
+ length
;
2894 dwarf2_per_objfile
->signatured_types
= types_htab
;
2896 dwarf2_per_objfile
->n_type_comp_units
= htab_elements (types_htab
);
2897 dwarf2_per_objfile
->type_comp_units
2898 = obstack_alloc (&objfile
->objfile_obstack
,
2899 dwarf2_per_objfile
->n_type_comp_units
2900 * sizeof (struct dwarf2_per_cu_data
*));
2901 iter
= &dwarf2_per_objfile
->type_comp_units
[0];
2902 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_list
, &iter
);
2903 gdb_assert (iter
- &dwarf2_per_objfile
->type_comp_units
[0]
2904 == dwarf2_per_objfile
->n_type_comp_units
);
2909 /* Lookup a signature based type.
2910 Returns NULL if SIG is not present in the table. */
2912 static struct signatured_type
*
2913 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
2915 struct signatured_type find_entry
, *entry
;
2917 if (dwarf2_per_objfile
->signatured_types
== NULL
)
2919 complaint (&symfile_complaints
,
2920 _("missing `.debug_types' section for DW_FORM_sig8 die"));
2924 find_entry
.signature
= sig
;
2925 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
2929 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
2932 init_cu_die_reader (struct die_reader_specs
*reader
,
2933 struct dwarf2_cu
*cu
)
2935 reader
->abfd
= cu
->objfile
->obfd
;
2937 if (cu
->per_cu
->from_debug_types
)
2939 gdb_assert (dwarf2_per_objfile
->types
.readin
);
2940 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
2944 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2945 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
2949 /* Find the base address of the compilation unit for range lists and
2950 location lists. It will normally be specified by DW_AT_low_pc.
2951 In DWARF-3 draft 4, the base address could be overridden by
2952 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2953 compilation units with discontinuous ranges. */
2956 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
2958 struct attribute
*attr
;
2961 cu
->base_address
= 0;
2963 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
2966 cu
->base_address
= DW_ADDR (attr
);
2971 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
2974 cu
->base_address
= DW_ADDR (attr
);
2980 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
2981 to combine the common parts.
2982 Process a compilation unit for a psymtab.
2983 BUFFER is a pointer to the beginning of the dwarf section buffer,
2984 either .debug_info or debug_types.
2985 INFO_PTR is a pointer to the start of the CU.
2986 Returns a pointer to the next CU. */
2989 process_psymtab_comp_unit (struct objfile
*objfile
,
2990 struct dwarf2_per_cu_data
*this_cu
,
2991 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2992 unsigned int buffer_size
)
2994 bfd
*abfd
= objfile
->obfd
;
2995 gdb_byte
*beg_of_comp_unit
= info_ptr
;
2996 struct die_info
*comp_unit_die
;
2997 struct partial_symtab
*pst
;
2999 struct cleanup
*back_to_inner
;
3000 struct dwarf2_cu cu
;
3001 int has_children
, has_pc_info
;
3002 struct attribute
*attr
;
3003 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
3004 struct die_reader_specs reader_specs
;
3006 memset (&cu
, 0, sizeof (cu
));
3007 cu
.objfile
= objfile
;
3008 obstack_init (&cu
.comp_unit_obstack
);
3010 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
3012 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
3013 buffer
, buffer_size
,
3016 /* Complete the cu_header. */
3017 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
3018 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3020 cu
.list_in_scope
= &file_symbols
;
3022 /* If this compilation unit was already read in, free the
3023 cached copy in order to read it in again. This is
3024 necessary because we skipped some symbols when we first
3025 read in the compilation unit (see load_partial_dies).
3026 This problem could be avoided, but the benefit is
3028 if (this_cu
->cu
!= NULL
)
3029 free_one_cached_comp_unit (this_cu
->cu
);
3031 /* Note that this is a pointer to our stack frame, being
3032 added to a global data structure. It will be cleaned up
3033 in free_stack_comp_unit when we finish with this
3034 compilation unit. */
3036 cu
.per_cu
= this_cu
;
3038 /* Read the abbrevs for this compilation unit into a table. */
3039 dwarf2_read_abbrevs (abfd
, &cu
);
3040 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
3042 /* Read the compilation unit die. */
3043 if (this_cu
->from_debug_types
)
3044 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
3045 init_cu_die_reader (&reader_specs
, &cu
);
3046 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3049 if (this_cu
->from_debug_types
)
3051 /* offset,length haven't been set yet for type units. */
3052 this_cu
->offset
= cu
.header
.offset
;
3053 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
3055 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3057 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3058 + cu
.header
.initial_length_size
);
3059 do_cleanups (back_to_inner
);
3063 /* Set the language we're debugging. */
3064 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
3066 set_cu_language (DW_UNSND (attr
), &cu
);
3068 set_cu_language (language_minimal
, &cu
);
3070 /* Allocate a new partial symbol table structure. */
3071 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
3072 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
3073 (attr
!= NULL
) ? DW_STRING (attr
) : "",
3074 /* TEXTLOW and TEXTHIGH are set below. */
3076 objfile
->global_psymbols
.next
,
3077 objfile
->static_psymbols
.next
);
3079 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
3081 pst
->dirname
= DW_STRING (attr
);
3083 pst
->read_symtab_private
= this_cu
;
3085 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3087 /* Store the function that reads in the rest of the symbol table */
3088 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
3090 this_cu
->v
.psymtab
= pst
;
3092 dwarf2_find_base_address (comp_unit_die
, &cu
);
3094 /* Possibly set the default values of LOWPC and HIGHPC from
3096 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
3097 &best_highpc
, &cu
, pst
);
3098 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
3099 /* Store the contiguous range if it is not empty; it can be empty for
3100 CUs with no code. */
3101 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3102 best_lowpc
+ baseaddr
,
3103 best_highpc
+ baseaddr
- 1, pst
);
3105 /* Check if comp unit has_children.
3106 If so, read the rest of the partial symbols from this comp unit.
3107 If not, there's no more debug_info for this comp unit. */
3110 struct partial_die_info
*first_die
;
3111 CORE_ADDR lowpc
, highpc
;
3113 lowpc
= ((CORE_ADDR
) -1);
3114 highpc
= ((CORE_ADDR
) 0);
3116 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
3118 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
3119 ! has_pc_info
, &cu
);
3121 /* If we didn't find a lowpc, set it to highpc to avoid
3122 complaints from `maint check'. */
3123 if (lowpc
== ((CORE_ADDR
) -1))
3126 /* If the compilation unit didn't have an explicit address range,
3127 then use the information extracted from its child dies. */
3131 best_highpc
= highpc
;
3134 pst
->textlow
= best_lowpc
+ baseaddr
;
3135 pst
->texthigh
= best_highpc
+ baseaddr
;
3137 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
3138 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
3139 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
3140 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
3141 sort_pst_symbols (pst
);
3143 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
3144 + cu
.header
.initial_length_size
);
3146 if (this_cu
->from_debug_types
)
3148 /* It's not clear we want to do anything with stmt lists here.
3149 Waiting to see what gcc ultimately does. */
3153 /* Get the list of files included in the current compilation unit,
3154 and build a psymtab for each of them. */
3155 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
3158 do_cleanups (back_to_inner
);
3163 /* Traversal function for htab_traverse_noresize.
3164 Process one .debug_types comp-unit. */
3167 process_type_comp_unit (void **slot
, void *info
)
3169 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
3170 struct objfile
*objfile
= (struct objfile
*) info
;
3171 struct dwarf2_per_cu_data
*this_cu
;
3173 this_cu
= &entry
->per_cu
;
3175 gdb_assert (dwarf2_per_objfile
->types
.readin
);
3176 process_psymtab_comp_unit (objfile
, this_cu
,
3177 dwarf2_per_objfile
->types
.buffer
,
3178 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
3179 dwarf2_per_objfile
->types
.size
);
3184 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
3185 Build partial symbol tables for the .debug_types comp-units. */
3188 build_type_psymtabs (struct objfile
*objfile
)
3190 if (! create_debug_types_hash_table (objfile
))
3193 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
3194 process_type_comp_unit
, objfile
);
3197 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
3200 psymtabs_addrmap_cleanup (void *o
)
3202 struct objfile
*objfile
= o
;
3204 objfile
->psymtabs_addrmap
= NULL
;
3207 /* Build the partial symbol table by doing a quick pass through the
3208 .debug_info and .debug_abbrev sections. */
3211 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
3214 struct cleanup
*back_to
, *addrmap_cleanup
;
3215 struct obstack temp_obstack
;
3217 dwarf2_per_objfile
->reading_partial_symbols
= 1;
3219 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3220 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3222 /* Any cached compilation units will be linked by the per-objfile
3223 read_in_chain. Make sure to free them when we're done. */
3224 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
3226 build_type_psymtabs (objfile
);
3228 create_all_comp_units (objfile
);
3230 /* Create a temporary address map on a temporary obstack. We later
3231 copy this to the final obstack. */
3232 obstack_init (&temp_obstack
);
3233 make_cleanup_obstack_free (&temp_obstack
);
3234 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
3235 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
3237 /* Since the objects we're extracting from .debug_info vary in
3238 length, only the individual functions to extract them (like
3239 read_comp_unit_head and load_partial_die) can really know whether
3240 the buffer is large enough to hold another complete object.
3242 At the moment, they don't actually check that. If .debug_info
3243 holds just one extra byte after the last compilation unit's dies,
3244 then read_comp_unit_head will happily read off the end of the
3245 buffer. read_partial_die is similarly casual. Those functions
3248 For this loop condition, simply checking whether there's any data
3249 left at all should be sufficient. */
3251 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
3252 + dwarf2_per_objfile
->info
.size
))
3254 struct dwarf2_per_cu_data
*this_cu
;
3256 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
3259 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
3260 dwarf2_per_objfile
->info
.buffer
,
3262 dwarf2_per_objfile
->info
.size
);
3265 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
3266 &objfile
->objfile_obstack
);
3267 discard_cleanups (addrmap_cleanup
);
3269 do_cleanups (back_to
);
3272 /* Load the partial DIEs for a secondary CU into memory. */
3275 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
3276 struct objfile
*objfile
)
3278 bfd
*abfd
= objfile
->obfd
;
3279 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3280 struct die_info
*comp_unit_die
;
3281 struct dwarf2_cu
*cu
;
3282 struct cleanup
*free_abbrevs_cleanup
, *free_cu_cleanup
= NULL
;
3283 struct attribute
*attr
;
3285 struct die_reader_specs reader_specs
;
3288 gdb_assert (! this_cu
->from_debug_types
);
3290 gdb_assert (dwarf2_per_objfile
->info
.readin
);
3291 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
3292 beg_of_comp_unit
= info_ptr
;
3294 if (this_cu
->cu
== NULL
)
3296 cu
= alloc_one_comp_unit (objfile
);
3300 /* If an error occurs while loading, release our storage. */
3301 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3303 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
3304 dwarf2_per_objfile
->info
.buffer
,
3305 dwarf2_per_objfile
->info
.size
,
3308 /* Complete the cu_header. */
3309 cu
->header
.offset
= this_cu
->offset
;
3310 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3312 /* Link this compilation unit into the compilation unit tree. */
3314 cu
->per_cu
= this_cu
;
3316 /* Link this CU into read_in_chain. */
3317 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3318 dwarf2_per_objfile
->read_in_chain
= this_cu
;
3323 info_ptr
+= cu
->header
.first_die_offset
;
3326 /* Read the abbrevs for this compilation unit into a table. */
3327 gdb_assert (cu
->dwarf2_abbrevs
== NULL
);
3328 dwarf2_read_abbrevs (abfd
, cu
);
3329 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3331 /* Read the compilation unit die. */
3332 init_cu_die_reader (&reader_specs
, cu
);
3333 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
3336 /* Set the language we're debugging. */
3337 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
3339 set_cu_language (DW_UNSND (attr
), cu
);
3341 set_cu_language (language_minimal
, cu
);
3343 /* Check if comp unit has_children.
3344 If so, read the rest of the partial symbols from this comp unit.
3345 If not, there's no more debug_info for this comp unit. */
3347 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
3349 do_cleanups (free_abbrevs_cleanup
);
3353 /* We've successfully allocated this compilation unit. Let our
3354 caller clean it up when finished with it. */
3355 discard_cleanups (free_cu_cleanup
);
3359 /* Create a list of all compilation units in OBJFILE. We do this only
3360 if an inter-comp-unit reference is found; presumably if there is one,
3361 there will be many, and one will occur early in the .debug_info section.
3362 So there's no point in building this list incrementally. */
3365 create_all_comp_units (struct objfile
*objfile
)
3369 struct dwarf2_per_cu_data
**all_comp_units
;
3372 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3373 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
3377 all_comp_units
= xmalloc (n_allocated
3378 * sizeof (struct dwarf2_per_cu_data
*));
3380 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
3382 unsigned int length
, initial_length_size
;
3383 struct dwarf2_per_cu_data
*this_cu
;
3384 unsigned int offset
;
3386 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
3388 /* Read just enough information to find out where the next
3389 compilation unit is. */
3390 length
= read_initial_length (objfile
->obfd
, info_ptr
,
3391 &initial_length_size
);
3393 /* Save the compilation unit for later lookup. */
3394 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
3395 sizeof (struct dwarf2_per_cu_data
));
3396 memset (this_cu
, 0, sizeof (*this_cu
));
3397 this_cu
->offset
= offset
;
3398 this_cu
->length
= length
+ initial_length_size
;
3399 this_cu
->objfile
= objfile
;
3401 if (n_comp_units
== n_allocated
)
3404 all_comp_units
= xrealloc (all_comp_units
,
3406 * sizeof (struct dwarf2_per_cu_data
*));
3408 all_comp_units
[n_comp_units
++] = this_cu
;
3410 info_ptr
= info_ptr
+ this_cu
->length
;
3413 dwarf2_per_objfile
->all_comp_units
3414 = obstack_alloc (&objfile
->objfile_obstack
,
3415 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3416 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
3417 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
3418 xfree (all_comp_units
);
3419 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
3422 /* Process all loaded DIEs for compilation unit CU, starting at
3423 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
3424 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
3425 DW_AT_ranges). If NEED_PC is set, then this function will set
3426 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
3427 and record the covered ranges in the addrmap. */
3430 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
3431 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3433 struct partial_die_info
*pdi
;
3435 /* Now, march along the PDI's, descending into ones which have
3436 interesting children but skipping the children of the other ones,
3437 until we reach the end of the compilation unit. */
3443 fixup_partial_die (pdi
, cu
);
3445 /* Anonymous namespaces or modules have no name but have interesting
3446 children, so we need to look at them. Ditto for anonymous
3449 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
3450 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
3454 case DW_TAG_subprogram
:
3455 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3457 case DW_TAG_constant
:
3458 case DW_TAG_variable
:
3459 case DW_TAG_typedef
:
3460 case DW_TAG_union_type
:
3461 if (!pdi
->is_declaration
)
3463 add_partial_symbol (pdi
, cu
);
3466 case DW_TAG_class_type
:
3467 case DW_TAG_interface_type
:
3468 case DW_TAG_structure_type
:
3469 if (!pdi
->is_declaration
)
3471 add_partial_symbol (pdi
, cu
);
3474 case DW_TAG_enumeration_type
:
3475 if (!pdi
->is_declaration
)
3476 add_partial_enumeration (pdi
, cu
);
3478 case DW_TAG_base_type
:
3479 case DW_TAG_subrange_type
:
3480 /* File scope base type definitions are added to the partial
3482 add_partial_symbol (pdi
, cu
);
3484 case DW_TAG_namespace
:
3485 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
3488 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
3495 /* If the die has a sibling, skip to the sibling. */
3497 pdi
= pdi
->die_sibling
;
3501 /* Functions used to compute the fully scoped name of a partial DIE.
3503 Normally, this is simple. For C++, the parent DIE's fully scoped
3504 name is concatenated with "::" and the partial DIE's name. For
3505 Java, the same thing occurs except that "." is used instead of "::".
3506 Enumerators are an exception; they use the scope of their parent
3507 enumeration type, i.e. the name of the enumeration type is not
3508 prepended to the enumerator.
3510 There are two complexities. One is DW_AT_specification; in this
3511 case "parent" means the parent of the target of the specification,
3512 instead of the direct parent of the DIE. The other is compilers
3513 which do not emit DW_TAG_namespace; in this case we try to guess
3514 the fully qualified name of structure types from their members'
3515 linkage names. This must be done using the DIE's children rather
3516 than the children of any DW_AT_specification target. We only need
3517 to do this for structures at the top level, i.e. if the target of
3518 any DW_AT_specification (if any; otherwise the DIE itself) does not
3521 /* Compute the scope prefix associated with PDI's parent, in
3522 compilation unit CU. The result will be allocated on CU's
3523 comp_unit_obstack, or a copy of the already allocated PDI->NAME
3524 field. NULL is returned if no prefix is necessary. */
3526 partial_die_parent_scope (struct partial_die_info
*pdi
,
3527 struct dwarf2_cu
*cu
)
3529 char *grandparent_scope
;
3530 struct partial_die_info
*parent
, *real_pdi
;
3532 /* We need to look at our parent DIE; if we have a DW_AT_specification,
3533 then this means the parent of the specification DIE. */
3536 while (real_pdi
->has_specification
)
3537 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3539 parent
= real_pdi
->die_parent
;
3543 if (parent
->scope_set
)
3544 return parent
->scope
;
3546 fixup_partial_die (parent
, cu
);
3548 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
3550 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
3551 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
3552 Work around this problem here. */
3553 if (cu
->language
== language_cplus
3554 && parent
->tag
== DW_TAG_namespace
3555 && strcmp (parent
->name
, "::") == 0
3556 && grandparent_scope
== NULL
)
3558 parent
->scope
= NULL
;
3559 parent
->scope_set
= 1;
3563 if (parent
->tag
== DW_TAG_namespace
3564 || parent
->tag
== DW_TAG_module
3565 || parent
->tag
== DW_TAG_structure_type
3566 || parent
->tag
== DW_TAG_class_type
3567 || parent
->tag
== DW_TAG_interface_type
3568 || parent
->tag
== DW_TAG_union_type
3569 || parent
->tag
== DW_TAG_enumeration_type
)
3571 if (grandparent_scope
== NULL
)
3572 parent
->scope
= parent
->name
;
3574 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
3575 parent
->name
, 0, cu
);
3577 else if (parent
->tag
== DW_TAG_enumerator
)
3578 /* Enumerators should not get the name of the enumeration as a prefix. */
3579 parent
->scope
= grandparent_scope
;
3582 /* FIXME drow/2004-04-01: What should we be doing with
3583 function-local names? For partial symbols, we should probably be
3585 complaint (&symfile_complaints
,
3586 _("unhandled containing DIE tag %d for DIE at %d"),
3587 parent
->tag
, pdi
->offset
);
3588 parent
->scope
= grandparent_scope
;
3591 parent
->scope_set
= 1;
3592 return parent
->scope
;
3595 /* Return the fully scoped name associated with PDI, from compilation unit
3596 CU. The result will be allocated with malloc. */
3598 partial_die_full_name (struct partial_die_info
*pdi
,
3599 struct dwarf2_cu
*cu
)
3603 /* If this is a template instantiation, we can not work out the
3604 template arguments from partial DIEs. So, unfortunately, we have
3605 to go through the full DIEs. At least any work we do building
3606 types here will be reused if full symbols are loaded later. */
3607 if (pdi
->has_template_arguments
)
3609 fixup_partial_die (pdi
, cu
);
3611 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
3613 struct die_info
*die
;
3614 struct attribute attr
;
3615 struct dwarf2_cu
*ref_cu
= cu
;
3618 attr
.form
= DW_FORM_ref_addr
;
3619 attr
.u
.addr
= pdi
->offset
;
3620 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
3622 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
3626 parent_scope
= partial_die_parent_scope (pdi
, cu
);
3627 if (parent_scope
== NULL
)
3630 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
3634 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
3636 struct objfile
*objfile
= cu
->objfile
;
3638 char *actual_name
= NULL
;
3639 const struct partial_symbol
*psym
= NULL
;
3641 int built_actual_name
= 0;
3643 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3645 actual_name
= partial_die_full_name (pdi
, cu
);
3647 built_actual_name
= 1;
3649 if (actual_name
== NULL
)
3650 actual_name
= pdi
->name
;
3654 case DW_TAG_subprogram
:
3655 if (pdi
->is_external
|| cu
->language
== language_ada
)
3657 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
3658 of the global scope. But in Ada, we want to be able to access
3659 nested procedures globally. So all Ada subprograms are stored
3660 in the global scope. */
3661 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3662 mst_text, objfile); */
3663 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3665 VAR_DOMAIN
, LOC_BLOCK
,
3666 &objfile
->global_psymbols
,
3667 0, pdi
->lowpc
+ baseaddr
,
3668 cu
->language
, objfile
);
3672 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
3673 mst_file_text, objfile); */
3674 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3676 VAR_DOMAIN
, LOC_BLOCK
,
3677 &objfile
->static_psymbols
,
3678 0, pdi
->lowpc
+ baseaddr
,
3679 cu
->language
, objfile
);
3682 case DW_TAG_constant
:
3684 struct psymbol_allocation_list
*list
;
3686 if (pdi
->is_external
)
3687 list
= &objfile
->global_psymbols
;
3689 list
= &objfile
->static_psymbols
;
3690 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3691 built_actual_name
, VAR_DOMAIN
, LOC_STATIC
,
3692 list
, 0, 0, cu
->language
, objfile
);
3696 case DW_TAG_variable
:
3698 addr
= decode_locdesc (pdi
->locdesc
, cu
);
3702 && !dwarf2_per_objfile
->has_section_at_zero
)
3704 /* A global or static variable may also have been stripped
3705 out by the linker if unused, in which case its address
3706 will be nullified; do not add such variables into partial
3707 symbol table then. */
3709 else if (pdi
->is_external
)
3712 Don't enter into the minimal symbol tables as there is
3713 a minimal symbol table entry from the ELF symbols already.
3714 Enter into partial symbol table if it has a location
3715 descriptor or a type.
3716 If the location descriptor is missing, new_symbol will create
3717 a LOC_UNRESOLVED symbol, the address of the variable will then
3718 be determined from the minimal symbol table whenever the variable
3720 The address for the partial symbol table entry is not
3721 used by GDB, but it comes in handy for debugging partial symbol
3724 if (pdi
->locdesc
|| pdi
->has_type
)
3725 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3727 VAR_DOMAIN
, LOC_STATIC
,
3728 &objfile
->global_psymbols
,
3730 cu
->language
, objfile
);
3734 /* Static Variable. Skip symbols without location descriptors. */
3735 if (pdi
->locdesc
== NULL
)
3737 if (built_actual_name
)
3738 xfree (actual_name
);
3741 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
3742 mst_file_data, objfile); */
3743 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
3745 VAR_DOMAIN
, LOC_STATIC
,
3746 &objfile
->static_psymbols
,
3748 cu
->language
, objfile
);
3751 case DW_TAG_typedef
:
3752 case DW_TAG_base_type
:
3753 case DW_TAG_subrange_type
:
3754 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3756 VAR_DOMAIN
, LOC_TYPEDEF
,
3757 &objfile
->static_psymbols
,
3758 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3760 case DW_TAG_namespace
:
3761 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3763 VAR_DOMAIN
, LOC_TYPEDEF
,
3764 &objfile
->global_psymbols
,
3765 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3767 case DW_TAG_class_type
:
3768 case DW_TAG_interface_type
:
3769 case DW_TAG_structure_type
:
3770 case DW_TAG_union_type
:
3771 case DW_TAG_enumeration_type
:
3772 /* Skip external references. The DWARF standard says in the section
3773 about "Structure, Union, and Class Type Entries": "An incomplete
3774 structure, union or class type is represented by a structure,
3775 union or class entry that does not have a byte size attribute
3776 and that has a DW_AT_declaration attribute." */
3777 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
3779 if (built_actual_name
)
3780 xfree (actual_name
);
3784 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
3785 static vs. global. */
3786 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3788 STRUCT_DOMAIN
, LOC_TYPEDEF
,
3789 (cu
->language
== language_cplus
3790 || cu
->language
== language_java
)
3791 ? &objfile
->global_psymbols
3792 : &objfile
->static_psymbols
,
3793 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3796 case DW_TAG_enumerator
:
3797 add_psymbol_to_list (actual_name
, strlen (actual_name
),
3799 VAR_DOMAIN
, LOC_CONST
,
3800 (cu
->language
== language_cplus
3801 || cu
->language
== language_java
)
3802 ? &objfile
->global_psymbols
3803 : &objfile
->static_psymbols
,
3804 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
3810 if (built_actual_name
)
3811 xfree (actual_name
);
3814 /* Read a partial die corresponding to a namespace; also, add a symbol
3815 corresponding to that namespace to the symbol table. NAMESPACE is
3816 the name of the enclosing namespace. */
3819 add_partial_namespace (struct partial_die_info
*pdi
,
3820 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3821 int need_pc
, struct dwarf2_cu
*cu
)
3823 /* Add a symbol for the namespace. */
3825 add_partial_symbol (pdi
, cu
);
3827 /* Now scan partial symbols in that namespace. */
3829 if (pdi
->has_children
)
3830 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3833 /* Read a partial die corresponding to a Fortran module. */
3836 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
3837 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
3839 /* Now scan partial symbols in that module. */
3841 if (pdi
->has_children
)
3842 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
3845 /* Read a partial die corresponding to a subprogram and create a partial
3846 symbol for that subprogram. When the CU language allows it, this
3847 routine also defines a partial symbol for each nested subprogram
3848 that this subprogram contains.
3850 DIE my also be a lexical block, in which case we simply search
3851 recursively for suprograms defined inside that lexical block.
3852 Again, this is only performed when the CU language allows this
3853 type of definitions. */
3856 add_partial_subprogram (struct partial_die_info
*pdi
,
3857 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3858 int need_pc
, struct dwarf2_cu
*cu
)
3860 if (pdi
->tag
== DW_TAG_subprogram
)
3862 if (pdi
->has_pc_info
)
3864 if (pdi
->lowpc
< *lowpc
)
3865 *lowpc
= pdi
->lowpc
;
3866 if (pdi
->highpc
> *highpc
)
3867 *highpc
= pdi
->highpc
;
3871 struct objfile
*objfile
= cu
->objfile
;
3873 baseaddr
= ANOFFSET (objfile
->section_offsets
,
3874 SECT_OFF_TEXT (objfile
));
3875 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3876 pdi
->lowpc
+ baseaddr
,
3877 pdi
->highpc
- 1 + baseaddr
,
3878 cu
->per_cu
->v
.psymtab
);
3880 if (!pdi
->is_declaration
)
3881 /* Ignore subprogram DIEs that do not have a name, they are
3882 illegal. Do not emit a complaint at this point, we will
3883 do so when we convert this psymtab into a symtab. */
3885 add_partial_symbol (pdi
, cu
);
3889 if (! pdi
->has_children
)
3892 if (cu
->language
== language_ada
)
3894 pdi
= pdi
->die_child
;
3897 fixup_partial_die (pdi
, cu
);
3898 if (pdi
->tag
== DW_TAG_subprogram
3899 || pdi
->tag
== DW_TAG_lexical_block
)
3900 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
3901 pdi
= pdi
->die_sibling
;
3906 /* See if we can figure out if the class lives in a namespace. We do
3907 this by looking for a member function; its demangled name will
3908 contain namespace info, if there is any. */
3911 guess_structure_name (struct partial_die_info
*struct_pdi
,
3912 struct dwarf2_cu
*cu
)
3914 if ((cu
->language
== language_cplus
3915 || cu
->language
== language_java
)
3916 && cu
->has_namespace_info
== 0
3917 && struct_pdi
->has_children
)
3919 /* NOTE: carlton/2003-10-07: Getting the info this way changes
3920 what template types look like, because the demangler
3921 frequently doesn't give the same name as the debug info. We
3922 could fix this by only using the demangled name to get the
3923 prefix (but see comment in read_structure_type). */
3925 struct partial_die_info
*real_pdi
;
3927 /* If this DIE (this DIE's specification, if any) has a parent, then
3928 we should not do this. We'll prepend the parent's fully qualified
3929 name when we create the partial symbol. */
3931 real_pdi
= struct_pdi
;
3932 while (real_pdi
->has_specification
)
3933 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
3935 if (real_pdi
->die_parent
!= NULL
)
3940 /* Read a partial die corresponding to an enumeration type. */
3943 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
3944 struct dwarf2_cu
*cu
)
3946 struct partial_die_info
*pdi
;
3948 if (enum_pdi
->name
!= NULL
)
3949 add_partial_symbol (enum_pdi
, cu
);
3951 pdi
= enum_pdi
->die_child
;
3954 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
3955 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
3957 add_partial_symbol (pdi
, cu
);
3958 pdi
= pdi
->die_sibling
;
3962 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
3963 Return the corresponding abbrev, or NULL if the number is zero (indicating
3964 an empty DIE). In either case *BYTES_READ will be set to the length of
3965 the initial number. */
3967 static struct abbrev_info
*
3968 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
3969 struct dwarf2_cu
*cu
)
3971 bfd
*abfd
= cu
->objfile
->obfd
;
3972 unsigned int abbrev_number
;
3973 struct abbrev_info
*abbrev
;
3975 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
3977 if (abbrev_number
== 0)
3980 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
3983 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
3984 bfd_get_filename (abfd
));
3990 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
3991 Returns a pointer to the end of a series of DIEs, terminated by an empty
3992 DIE. Any children of the skipped DIEs will also be skipped. */
3995 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
3997 struct abbrev_info
*abbrev
;
3998 unsigned int bytes_read
;
4002 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
4004 return info_ptr
+ bytes_read
;
4006 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
4010 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
4011 INFO_PTR should point just after the initial uleb128 of a DIE, and the
4012 abbrev corresponding to that skipped uleb128 should be passed in
4013 ABBREV. Returns a pointer to this DIE's sibling, skipping any
4017 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4018 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
4020 unsigned int bytes_read
;
4021 struct attribute attr
;
4022 bfd
*abfd
= cu
->objfile
->obfd
;
4023 unsigned int form
, i
;
4025 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
4027 /* The only abbrev we care about is DW_AT_sibling. */
4028 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
4030 read_attribute (&attr
, &abbrev
->attrs
[i
],
4031 abfd
, info_ptr
, cu
);
4032 if (attr
.form
== DW_FORM_ref_addr
)
4033 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
4035 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
4038 /* If it isn't DW_AT_sibling, skip this attribute. */
4039 form
= abbrev
->attrs
[i
].form
;
4043 case DW_FORM_ref_addr
:
4044 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
4045 and later it is offset sized. */
4046 if (cu
->header
.version
== 2)
4047 info_ptr
+= cu
->header
.addr_size
;
4049 info_ptr
+= cu
->header
.offset_size
;
4052 info_ptr
+= cu
->header
.addr_size
;
4059 case DW_FORM_flag_present
:
4074 case DW_FORM_string
:
4075 read_direct_string (abfd
, info_ptr
, &bytes_read
);
4076 info_ptr
+= bytes_read
;
4078 case DW_FORM_sec_offset
:
4080 info_ptr
+= cu
->header
.offset_size
;
4082 case DW_FORM_exprloc
:
4084 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4085 info_ptr
+= bytes_read
;
4087 case DW_FORM_block1
:
4088 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
4090 case DW_FORM_block2
:
4091 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
4093 case DW_FORM_block4
:
4094 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
4098 case DW_FORM_ref_udata
:
4099 info_ptr
= skip_leb128 (abfd
, info_ptr
);
4101 case DW_FORM_indirect
:
4102 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
4103 info_ptr
+= bytes_read
;
4104 /* We need to continue parsing from here, so just go back to
4106 goto skip_attribute
;
4109 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
4110 dwarf_form_name (form
),
4111 bfd_get_filename (abfd
));
4115 if (abbrev
->has_children
)
4116 return skip_children (buffer
, info_ptr
, cu
);
4121 /* Locate ORIG_PDI's sibling.
4122 INFO_PTR should point to the start of the next DIE after ORIG_PDI
4126 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
4127 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
4128 bfd
*abfd
, struct dwarf2_cu
*cu
)
4130 /* Do we know the sibling already? */
4132 if (orig_pdi
->sibling
)
4133 return orig_pdi
->sibling
;
4135 /* Are there any children to deal with? */
4137 if (!orig_pdi
->has_children
)
4140 /* Skip the children the long way. */
4142 return skip_children (buffer
, info_ptr
, cu
);
4145 /* Expand this partial symbol table into a full symbol table. */
4148 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
4154 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
4160 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
4161 gdb_flush (gdb_stdout
);
4164 /* Restore our global data. */
4165 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
4166 dwarf2_objfile_data_key
);
4168 /* If this psymtab is constructed from a debug-only objfile, the
4169 has_section_at_zero flag will not necessarily be correct. We
4170 can get the correct value for this flag by looking at the data
4171 associated with the (presumably stripped) associated objfile. */
4172 if (pst
->objfile
->separate_debug_objfile_backlink
)
4174 struct dwarf2_per_objfile
*dpo_backlink
4175 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
4176 dwarf2_objfile_data_key
);
4178 dwarf2_per_objfile
->has_section_at_zero
4179 = dpo_backlink
->has_section_at_zero
;
4182 dwarf2_per_objfile
->reading_partial_symbols
= 0;
4184 psymtab_to_symtab_1 (pst
);
4186 /* Finish up the debug error message. */
4188 printf_filtered (_("done.\n"));
4193 /* Add PER_CU to the queue. */
4196 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4198 struct dwarf2_queue_item
*item
;
4201 item
= xmalloc (sizeof (*item
));
4202 item
->per_cu
= per_cu
;
4205 if (dwarf2_queue
== NULL
)
4206 dwarf2_queue
= item
;
4208 dwarf2_queue_tail
->next
= item
;
4210 dwarf2_queue_tail
= item
;
4213 /* Process the queue. */
4216 process_queue (struct objfile
*objfile
)
4218 struct dwarf2_queue_item
*item
, *next_item
;
4220 /* The queue starts out with one item, but following a DIE reference
4221 may load a new CU, adding it to the end of the queue. */
4222 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
4224 if (dwarf2_per_objfile
->using_index
4225 ? !item
->per_cu
->v
.quick
->symtab
4226 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
4227 process_full_comp_unit (item
->per_cu
);
4229 item
->per_cu
->queued
= 0;
4230 next_item
= item
->next
;
4234 dwarf2_queue_tail
= NULL
;
4237 /* Free all allocated queue entries. This function only releases anything if
4238 an error was thrown; if the queue was processed then it would have been
4239 freed as we went along. */
4242 dwarf2_release_queue (void *dummy
)
4244 struct dwarf2_queue_item
*item
, *last
;
4246 item
= dwarf2_queue
;
4249 /* Anything still marked queued is likely to be in an
4250 inconsistent state, so discard it. */
4251 if (item
->per_cu
->queued
)
4253 if (item
->per_cu
->cu
!= NULL
)
4254 free_one_cached_comp_unit (item
->per_cu
->cu
);
4255 item
->per_cu
->queued
= 0;
4263 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
4266 /* Read in full symbols for PST, and anything it depends on. */
4269 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
4271 struct dwarf2_per_cu_data
*per_cu
;
4272 struct cleanup
*back_to
;
4275 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
4276 if (!pst
->dependencies
[i
]->readin
)
4278 /* Inform about additional files that need to be read in. */
4281 /* FIXME: i18n: Need to make this a single string. */
4282 fputs_filtered (" ", gdb_stdout
);
4284 fputs_filtered ("and ", gdb_stdout
);
4286 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
4287 wrap_here (""); /* Flush output */
4288 gdb_flush (gdb_stdout
);
4290 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
4293 per_cu
= pst
->read_symtab_private
;
4297 /* It's an include file, no symbols to read for it.
4298 Everything is in the parent symtab. */
4303 dw2_do_instantiate_symtab (pst
->objfile
, per_cu
);
4306 /* Load the DIEs associated with PER_CU into memory. */
4309 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
4311 bfd
*abfd
= objfile
->obfd
;
4312 struct dwarf2_cu
*cu
;
4313 unsigned int offset
;
4314 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
4315 struct cleanup
*free_abbrevs_cleanup
= NULL
, *free_cu_cleanup
= NULL
;
4316 struct attribute
*attr
;
4319 gdb_assert (! per_cu
->from_debug_types
);
4321 /* Set local variables from the partial symbol table info. */
4322 offset
= per_cu
->offset
;
4324 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
4325 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
4326 beg_of_comp_unit
= info_ptr
;
4328 if (per_cu
->cu
== NULL
)
4330 cu
= alloc_one_comp_unit (objfile
);
4334 /* If an error occurs while loading, release our storage. */
4335 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
4337 /* Read in the comp_unit header. */
4338 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
4340 /* Complete the cu_header. */
4341 cu
->header
.offset
= offset
;
4342 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
4344 /* Read the abbrevs for this compilation unit. */
4345 dwarf2_read_abbrevs (abfd
, cu
);
4346 free_abbrevs_cleanup
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
4348 /* Link this compilation unit into the compilation unit tree. */
4350 cu
->per_cu
= per_cu
;
4352 /* Link this CU into read_in_chain. */
4353 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
4354 dwarf2_per_objfile
->read_in_chain
= per_cu
;
4359 info_ptr
+= cu
->header
.first_die_offset
;
4362 cu
->dies
= read_comp_unit (info_ptr
, cu
);
4364 /* We try not to read any attributes in this function, because not
4365 all objfiles needed for references have been loaded yet, and symbol
4366 table processing isn't initialized. But we have to set the CU language,
4367 or we won't be able to build types correctly. */
4368 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
4370 set_cu_language (DW_UNSND (attr
), cu
);
4372 set_cu_language (language_minimal
, cu
);
4374 /* Similarly, if we do not read the producer, we can not apply
4375 producer-specific interpretation. */
4376 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
4378 cu
->producer
= DW_STRING (attr
);
4382 do_cleanups (free_abbrevs_cleanup
);
4384 /* We've successfully allocated this compilation unit. Let our
4385 caller clean it up when finished with it. */
4386 discard_cleanups (free_cu_cleanup
);
4390 /* Add a DIE to the delayed physname list. */
4393 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
4394 const char *name
, struct die_info
*die
,
4395 struct dwarf2_cu
*cu
)
4397 struct delayed_method_info mi
;
4399 mi
.fnfield_index
= fnfield_index
;
4403 VEC_safe_push (delayed_method_info
, cu
->method_list
, &mi
);
4406 /* A cleanup for freeing the delayed method list. */
4409 free_delayed_list (void *ptr
)
4411 struct dwarf2_cu
*cu
= (struct dwarf2_cu
*) ptr
;
4412 if (cu
->method_list
!= NULL
)
4414 VEC_free (delayed_method_info
, cu
->method_list
);
4415 cu
->method_list
= NULL
;
4419 /* Compute the physnames of any methods on the CU's method list.
4421 The computation of method physnames is delayed in order to avoid the
4422 (bad) condition that one of the method's formal parameters is of an as yet
4426 compute_delayed_physnames (struct dwarf2_cu
*cu
)
4429 struct delayed_method_info
*mi
;
4430 for (i
= 0; VEC_iterate (delayed_method_info
, cu
->method_list
, i
, mi
) ; ++i
)
4433 struct fn_fieldlist
*fn_flp
4434 = &TYPE_FN_FIELDLIST (mi
->type
, mi
->fnfield_index
);
4435 physname
= (char *) dwarf2_physname ((char *) mi
->name
, mi
->die
, cu
);
4436 fn_flp
->fn_fields
[mi
->index
].physname
= physname
? physname
: "";
4440 /* Generate full symbol information for PST and CU, whose DIEs have
4441 already been loaded into memory. */
4444 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
4446 struct dwarf2_cu
*cu
= per_cu
->cu
;
4447 struct objfile
*objfile
= per_cu
->objfile
;
4448 CORE_ADDR lowpc
, highpc
;
4449 struct symtab
*symtab
;
4450 struct cleanup
*back_to
, *delayed_list_cleanup
;
4453 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4456 back_to
= make_cleanup (really_free_pendings
, NULL
);
4457 delayed_list_cleanup
= make_cleanup (free_delayed_list
, cu
);
4459 cu
->list_in_scope
= &file_symbols
;
4461 dwarf2_find_base_address (cu
->dies
, cu
);
4463 /* Do line number decoding in read_file_scope () */
4464 process_die (cu
->dies
, cu
);
4466 /* Now that we have processed all the DIEs in the CU, all the types
4467 should be complete, and it should now be safe to compute all of the
4469 compute_delayed_physnames (cu
);
4470 do_cleanups (delayed_list_cleanup
);
4472 /* Some compilers don't define a DW_AT_high_pc attribute for the
4473 compilation unit. If the DW_AT_high_pc is missing, synthesize
4474 it, by scanning the DIE's below the compilation unit. */
4475 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
4477 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
4479 /* Set symtab language to language from DW_AT_language.
4480 If the compilation is from a C file generated by language preprocessors,
4481 do not set the language if it was already deduced by start_subfile. */
4483 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
4485 symtab
->language
= cu
->language
;
4488 if (dwarf2_per_objfile
->using_index
)
4489 per_cu
->v
.quick
->symtab
= symtab
;
4492 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
4493 pst
->symtab
= symtab
;
4497 do_cleanups (back_to
);
4500 /* Process a die and its children. */
4503 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
4507 case DW_TAG_padding
:
4509 case DW_TAG_compile_unit
:
4510 read_file_scope (die
, cu
);
4512 case DW_TAG_type_unit
:
4513 read_type_unit_scope (die
, cu
);
4515 case DW_TAG_subprogram
:
4516 case DW_TAG_inlined_subroutine
:
4517 read_func_scope (die
, cu
);
4519 case DW_TAG_lexical_block
:
4520 case DW_TAG_try_block
:
4521 case DW_TAG_catch_block
:
4522 read_lexical_block_scope (die
, cu
);
4524 case DW_TAG_class_type
:
4525 case DW_TAG_interface_type
:
4526 case DW_TAG_structure_type
:
4527 case DW_TAG_union_type
:
4528 process_structure_scope (die
, cu
);
4530 case DW_TAG_enumeration_type
:
4531 process_enumeration_scope (die
, cu
);
4534 /* These dies have a type, but processing them does not create
4535 a symbol or recurse to process the children. Therefore we can
4536 read them on-demand through read_type_die. */
4537 case DW_TAG_subroutine_type
:
4538 case DW_TAG_set_type
:
4539 case DW_TAG_array_type
:
4540 case DW_TAG_pointer_type
:
4541 case DW_TAG_ptr_to_member_type
:
4542 case DW_TAG_reference_type
:
4543 case DW_TAG_string_type
:
4546 case DW_TAG_base_type
:
4547 case DW_TAG_subrange_type
:
4548 case DW_TAG_typedef
:
4549 /* Add a typedef symbol for the type definition, if it has a
4551 new_symbol (die
, read_type_die (die
, cu
), cu
);
4553 case DW_TAG_common_block
:
4554 read_common_block (die
, cu
);
4556 case DW_TAG_common_inclusion
:
4558 case DW_TAG_namespace
:
4559 processing_has_namespace_info
= 1;
4560 read_namespace (die
, cu
);
4563 processing_has_namespace_info
= 1;
4564 read_module (die
, cu
);
4566 case DW_TAG_imported_declaration
:
4567 case DW_TAG_imported_module
:
4568 processing_has_namespace_info
= 1;
4569 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
4570 || cu
->language
!= language_fortran
))
4571 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
4572 dwarf_tag_name (die
->tag
));
4573 read_import_statement (die
, cu
);
4576 new_symbol (die
, NULL
, cu
);
4581 /* A helper function for dwarf2_compute_name which determines whether DIE
4582 needs to have the name of the scope prepended to the name listed in the
4586 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4588 struct attribute
*attr
;
4592 case DW_TAG_namespace
:
4593 case DW_TAG_typedef
:
4594 case DW_TAG_class_type
:
4595 case DW_TAG_interface_type
:
4596 case DW_TAG_structure_type
:
4597 case DW_TAG_union_type
:
4598 case DW_TAG_enumeration_type
:
4599 case DW_TAG_enumerator
:
4600 case DW_TAG_subprogram
:
4604 case DW_TAG_variable
:
4605 case DW_TAG_constant
:
4606 /* We only need to prefix "globally" visible variables. These include
4607 any variable marked with DW_AT_external or any variable that
4608 lives in a namespace. [Variables in anonymous namespaces
4609 require prefixing, but they are not DW_AT_external.] */
4611 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
4613 struct dwarf2_cu
*spec_cu
= cu
;
4615 return die_needs_namespace (die_specification (die
, &spec_cu
),
4619 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
4620 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
4621 && die
->parent
->tag
!= DW_TAG_module
)
4623 /* A variable in a lexical block of some kind does not need a
4624 namespace, even though in C++ such variables may be external
4625 and have a mangled name. */
4626 if (die
->parent
->tag
== DW_TAG_lexical_block
4627 || die
->parent
->tag
== DW_TAG_try_block
4628 || die
->parent
->tag
== DW_TAG_catch_block
4629 || die
->parent
->tag
== DW_TAG_subprogram
)
4638 /* Retrieve the last character from a mem_file. */
4641 do_ui_file_peek_last (void *object
, const char *buffer
, long length
)
4643 char *last_char_p
= (char *) object
;
4646 *last_char_p
= buffer
[length
- 1];
4649 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
4650 compute the physname for the object, which include a method's
4651 formal parameters (C++/Java) and return type (Java).
4653 For Ada, return the DIE's linkage name rather than the fully qualified
4654 name. PHYSNAME is ignored..
4656 The result is allocated on the objfile_obstack and canonicalized. */
4659 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
4663 name
= dwarf2_name (die
, cu
);
4665 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
4666 compute it by typename_concat inside GDB. */
4667 if (cu
->language
== language_ada
4668 || (cu
->language
== language_fortran
&& physname
))
4670 /* For Ada unit, we prefer the linkage name over the name, as
4671 the former contains the exported name, which the user expects
4672 to be able to reference. Ideally, we want the user to be able
4673 to reference this entity using either natural or linkage name,
4674 but we haven't started looking at this enhancement yet. */
4675 struct attribute
*attr
;
4677 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
4679 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
4680 if (attr
&& DW_STRING (attr
))
4681 return DW_STRING (attr
);
4684 /* These are the only languages we know how to qualify names in. */
4686 && (cu
->language
== language_cplus
|| cu
->language
== language_java
4687 || cu
->language
== language_fortran
))
4689 if (die_needs_namespace (die
, cu
))
4693 struct ui_file
*buf
;
4695 prefix
= determine_prefix (die
, cu
);
4696 buf
= mem_fileopen ();
4697 if (*prefix
!= '\0')
4699 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
4702 fputs_unfiltered (prefixed_name
, buf
);
4703 xfree (prefixed_name
);
4706 fputs_unfiltered (name
? name
: "", buf
);
4708 /* Template parameters may be specified in the DIE's DW_AT_name, or
4709 as children with DW_TAG_template_type_param or
4710 DW_TAG_value_type_param. If the latter, add them to the name
4711 here. If the name already has template parameters, then
4712 skip this step; some versions of GCC emit both, and
4713 it is more efficient to use the pre-computed name.
4715 Something to keep in mind about this process: it is very
4716 unlikely, or in some cases downright impossible, to produce
4717 something that will match the mangled name of a function.
4718 If the definition of the function has the same debug info,
4719 we should be able to match up with it anyway. But fallbacks
4720 using the minimal symbol, for instance to find a method
4721 implemented in a stripped copy of libstdc++, will not work.
4722 If we do not have debug info for the definition, we will have to
4723 match them up some other way.
4725 When we do name matching there is a related problem with function
4726 templates; two instantiated function templates are allowed to
4727 differ only by their return types, which we do not add here. */
4729 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
4731 struct attribute
*attr
;
4732 struct die_info
*child
;
4735 die
->building_fullname
= 1;
4737 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
4742 struct dwarf2_locexpr_baton
*baton
;
4745 if (child
->tag
!= DW_TAG_template_type_param
4746 && child
->tag
!= DW_TAG_template_value_param
)
4751 fputs_unfiltered ("<", buf
);
4755 fputs_unfiltered (", ", buf
);
4757 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
4760 complaint (&symfile_complaints
,
4761 _("template parameter missing DW_AT_type"));
4762 fputs_unfiltered ("UNKNOWN_TYPE", buf
);
4765 type
= die_type (child
, cu
);
4767 if (child
->tag
== DW_TAG_template_type_param
)
4769 c_print_type (type
, "", buf
, -1, 0);
4773 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
4776 complaint (&symfile_complaints
,
4777 _("template parameter missing DW_AT_const_value"));
4778 fputs_unfiltered ("UNKNOWN_VALUE", buf
);
4782 dwarf2_const_value_attr (attr
, type
, name
,
4783 &cu
->comp_unit_obstack
, cu
,
4784 &value
, &bytes
, &baton
);
4786 if (TYPE_NOSIGN (type
))
4787 /* GDB prints characters as NUMBER 'CHAR'. If that's
4788 changed, this can use value_print instead. */
4789 c_printchar (value
, type
, buf
);
4792 struct value_print_options opts
;
4795 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
4799 else if (bytes
!= NULL
)
4801 v
= allocate_value (type
);
4802 memcpy (value_contents_writeable (v
), bytes
,
4803 TYPE_LENGTH (type
));
4806 v
= value_from_longest (type
, value
);
4808 /* Specify decimal so that we do not depend on the radix. */
4809 get_formatted_print_options (&opts
, 'd');
4811 value_print (v
, buf
, &opts
);
4817 die
->building_fullname
= 0;
4821 /* Close the argument list, with a space if necessary
4822 (nested templates). */
4823 char last_char
= '\0';
4824 ui_file_put (buf
, do_ui_file_peek_last
, &last_char
);
4825 if (last_char
== '>')
4826 fputs_unfiltered (" >", buf
);
4828 fputs_unfiltered (">", buf
);
4832 /* For Java and C++ methods, append formal parameter type
4833 information, if PHYSNAME. */
4835 if (physname
&& die
->tag
== DW_TAG_subprogram
4836 && (cu
->language
== language_cplus
4837 || cu
->language
== language_java
))
4839 struct type
*type
= read_type_die (die
, cu
);
4841 c_type_print_args (type
, buf
, 0, cu
->language
);
4843 if (cu
->language
== language_java
)
4845 /* For java, we must append the return type to method
4847 if (die
->tag
== DW_TAG_subprogram
)
4848 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
4851 else if (cu
->language
== language_cplus
)
4853 /* Assume that an artificial first parameter is
4854 "this", but do not crash if it is not. RealView
4855 marks unnamed (and thus unused) parameters as
4856 artificial; there is no way to differentiate
4858 if (TYPE_NFIELDS (type
) > 0
4859 && TYPE_FIELD_ARTIFICIAL (type
, 0)
4860 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
4861 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
4862 fputs_unfiltered (" const", buf
);
4866 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
4868 ui_file_delete (buf
);
4870 if (cu
->language
== language_cplus
)
4873 = dwarf2_canonicalize_name (name
, cu
,
4874 &cu
->objfile
->objfile_obstack
);
4885 /* Return the fully qualified name of DIE, based on its DW_AT_name.
4886 If scope qualifiers are appropriate they will be added. The result
4887 will be allocated on the objfile_obstack, or NULL if the DIE does
4888 not have a name. NAME may either be from a previous call to
4889 dwarf2_name or NULL.
4891 The output string will be canonicalized (if C++/Java). */
4894 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4896 return dwarf2_compute_name (name
, die
, cu
, 0);
4899 /* Construct a physname for the given DIE in CU. NAME may either be
4900 from a previous call to dwarf2_name or NULL. The result will be
4901 allocated on the objfile_objstack or NULL if the DIE does not have a
4904 The output string will be canonicalized (if C++/Java). */
4907 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
4909 return dwarf2_compute_name (name
, die
, cu
, 1);
4912 /* Read the import statement specified by the given die and record it. */
4915 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
4917 struct attribute
*import_attr
;
4918 struct die_info
*imported_die
;
4919 struct dwarf2_cu
*imported_cu
;
4920 const char *imported_name
;
4921 const char *imported_name_prefix
;
4922 const char *canonical_name
;
4923 const char *import_alias
;
4924 const char *imported_declaration
= NULL
;
4925 const char *import_prefix
;
4929 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
4930 if (import_attr
== NULL
)
4932 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
4933 dwarf_tag_name (die
->tag
));
4938 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
4939 imported_name
= dwarf2_name (imported_die
, imported_cu
);
4940 if (imported_name
== NULL
)
4942 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
4944 The import in the following code:
4958 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
4959 <52> DW_AT_decl_file : 1
4960 <53> DW_AT_decl_line : 6
4961 <54> DW_AT_import : <0x75>
4962 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
4964 <5b> DW_AT_decl_file : 1
4965 <5c> DW_AT_decl_line : 2
4966 <5d> DW_AT_type : <0x6e>
4968 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
4969 <76> DW_AT_byte_size : 4
4970 <77> DW_AT_encoding : 5 (signed)
4972 imports the wrong die ( 0x75 instead of 0x58 ).
4973 This case will be ignored until the gcc bug is fixed. */
4977 /* Figure out the local name after import. */
4978 import_alias
= dwarf2_name (die
, cu
);
4980 /* Figure out where the statement is being imported to. */
4981 import_prefix
= determine_prefix (die
, cu
);
4983 /* Figure out what the scope of the imported die is and prepend it
4984 to the name of the imported die. */
4985 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
4987 if (imported_die
->tag
!= DW_TAG_namespace
4988 && imported_die
->tag
!= DW_TAG_module
)
4990 imported_declaration
= imported_name
;
4991 canonical_name
= imported_name_prefix
;
4993 else if (strlen (imported_name_prefix
) > 0)
4995 temp
= alloca (strlen (imported_name_prefix
)
4996 + 2 + strlen (imported_name
) + 1);
4997 strcpy (temp
, imported_name_prefix
);
4998 strcat (temp
, "::");
4999 strcat (temp
, imported_name
);
5000 canonical_name
= temp
;
5003 canonical_name
= imported_name
;
5005 cp_add_using_directive (import_prefix
,
5008 imported_declaration
,
5009 &cu
->objfile
->objfile_obstack
);
5013 initialize_cu_func_list (struct dwarf2_cu
*cu
)
5015 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
5019 free_cu_line_header (void *arg
)
5021 struct dwarf2_cu
*cu
= arg
;
5023 free_line_header (cu
->line_header
);
5024 cu
->line_header
= NULL
;
5028 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
,
5029 char **name
, char **comp_dir
)
5031 struct attribute
*attr
;
5036 /* Find the filename. Do not use dwarf2_name here, since the filename
5037 is not a source language identifier. */
5038 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5041 *name
= DW_STRING (attr
);
5044 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5046 *comp_dir
= DW_STRING (attr
);
5047 else if (*name
!= NULL
&& IS_ABSOLUTE_PATH (*name
))
5049 *comp_dir
= ldirname (*name
);
5050 if (*comp_dir
!= NULL
)
5051 make_cleanup (xfree
, *comp_dir
);
5053 if (*comp_dir
!= NULL
)
5055 /* Irix 6.2 native cc prepends <machine>.: to the compilation
5056 directory, get rid of it. */
5057 char *cp
= strchr (*comp_dir
, ':');
5059 if (cp
&& cp
!= *comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
5064 *name
= "<unknown>";
5068 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5070 struct objfile
*objfile
= cu
->objfile
;
5071 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5072 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
5073 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
5074 struct attribute
*attr
;
5076 char *comp_dir
= NULL
;
5077 struct die_info
*child_die
;
5078 bfd
*abfd
= objfile
->obfd
;
5079 struct line_header
*line_header
= 0;
5082 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5084 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
5086 /* If we didn't find a lowpc, set it to highpc to avoid complaints
5087 from finish_block. */
5088 if (lowpc
== ((CORE_ADDR
) -1))
5093 find_file_and_directory (die
, cu
, &name
, &comp_dir
);
5095 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5098 set_cu_language (DW_UNSND (attr
), cu
);
5101 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5103 cu
->producer
= DW_STRING (attr
);
5105 /* We assume that we're processing GCC output. */
5106 processing_gcc_compilation
= 2;
5108 processing_has_namespace_info
= 0;
5110 start_symtab (name
, comp_dir
, lowpc
);
5111 record_debugformat ("DWARF 2");
5112 record_producer (cu
->producer
);
5114 initialize_cu_func_list (cu
);
5116 /* Decode line number information if present. We do this before
5117 processing child DIEs, so that the line header table is available
5118 for DW_AT_decl_file. */
5119 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
5122 unsigned int line_offset
= DW_UNSND (attr
);
5123 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
5126 cu
->line_header
= line_header
;
5127 make_cleanup (free_cu_line_header
, cu
);
5128 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
5132 /* Process all dies in compilation unit. */
5133 if (die
->child
!= NULL
)
5135 child_die
= die
->child
;
5136 while (child_die
&& child_die
->tag
)
5138 process_die (child_die
, cu
);
5139 child_die
= sibling_die (child_die
);
5143 /* Decode macro information, if present. Dwarf 2 macro information
5144 refers to information in the line number info statement program
5145 header, so we can only read it if we've read the header
5147 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
5148 if (attr
&& line_header
)
5150 unsigned int macro_offset
= DW_UNSND (attr
);
5152 dwarf_decode_macros (line_header
, macro_offset
,
5153 comp_dir
, abfd
, cu
);
5155 do_cleanups (back_to
);
5158 /* For TUs we want to skip the first top level sibling if it's not the
5159 actual type being defined by this TU. In this case the first top
5160 level sibling is there to provide context only. */
5163 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5165 struct objfile
*objfile
= cu
->objfile
;
5166 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5168 struct attribute
*attr
;
5170 char *comp_dir
= NULL
;
5171 struct die_info
*child_die
;
5172 bfd
*abfd
= objfile
->obfd
;
5174 /* start_symtab needs a low pc, but we don't really have one.
5175 Do what read_file_scope would do in the absence of such info. */
5176 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5178 /* Find the filename. Do not use dwarf2_name here, since the filename
5179 is not a source language identifier. */
5180 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
5182 name
= DW_STRING (attr
);
5184 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
5186 comp_dir
= DW_STRING (attr
);
5187 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
5189 comp_dir
= ldirname (name
);
5190 if (comp_dir
!= NULL
)
5191 make_cleanup (xfree
, comp_dir
);
5197 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
5199 set_cu_language (DW_UNSND (attr
), cu
);
5201 /* This isn't technically needed today. It is done for symmetry
5202 with read_file_scope. */
5203 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
5205 cu
->producer
= DW_STRING (attr
);
5207 /* We assume that we're processing GCC output. */
5208 processing_gcc_compilation
= 2;
5210 processing_has_namespace_info
= 0;
5212 start_symtab (name
, comp_dir
, lowpc
);
5213 record_debugformat ("DWARF 2");
5214 record_producer (cu
->producer
);
5216 /* Process the dies in the type unit. */
5217 if (die
->child
== NULL
)
5219 dump_die_for_error (die
);
5220 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
5221 bfd_get_filename (abfd
));
5224 child_die
= die
->child
;
5226 while (child_die
&& child_die
->tag
)
5228 process_die (child_die
, cu
);
5230 child_die
= sibling_die (child_die
);
5233 do_cleanups (back_to
);
5237 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
5238 struct dwarf2_cu
*cu
)
5240 struct function_range
*thisfn
;
5242 thisfn
= (struct function_range
*)
5243 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
5244 thisfn
->name
= name
;
5245 thisfn
->lowpc
= lowpc
;
5246 thisfn
->highpc
= highpc
;
5247 thisfn
->seen_line
= 0;
5248 thisfn
->next
= NULL
;
5250 if (cu
->last_fn
== NULL
)
5251 cu
->first_fn
= thisfn
;
5253 cu
->last_fn
->next
= thisfn
;
5255 cu
->last_fn
= thisfn
;
5258 /* qsort helper for inherit_abstract_dies. */
5261 unsigned_int_compar (const void *ap
, const void *bp
)
5263 unsigned int a
= *(unsigned int *) ap
;
5264 unsigned int b
= *(unsigned int *) bp
;
5266 return (a
> b
) - (b
> a
);
5269 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
5270 Inherit only the children of the DW_AT_abstract_origin DIE not being already
5271 referenced by DW_AT_abstract_origin from the children of the current DIE. */
5274 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
5276 struct die_info
*child_die
;
5277 unsigned die_children_count
;
5278 /* CU offsets which were referenced by children of the current DIE. */
5280 unsigned *offsets_end
, *offsetp
;
5281 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
5282 struct die_info
*origin_die
;
5283 /* Iterator of the ORIGIN_DIE children. */
5284 struct die_info
*origin_child_die
;
5285 struct cleanup
*cleanups
;
5286 struct attribute
*attr
;
5287 struct dwarf2_cu
*origin_cu
;
5288 struct pending
**origin_previous_list_in_scope
;
5290 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
5294 /* Note that following die references may follow to a die in a
5298 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
5300 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
5302 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
5303 origin_cu
->list_in_scope
= cu
->list_in_scope
;
5305 if (die
->tag
!= origin_die
->tag
5306 && !(die
->tag
== DW_TAG_inlined_subroutine
5307 && origin_die
->tag
== DW_TAG_subprogram
))
5308 complaint (&symfile_complaints
,
5309 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
5310 die
->offset
, origin_die
->offset
);
5312 child_die
= die
->child
;
5313 die_children_count
= 0;
5314 while (child_die
&& child_die
->tag
)
5316 child_die
= sibling_die (child_die
);
5317 die_children_count
++;
5319 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
5320 cleanups
= make_cleanup (xfree
, offsets
);
5322 offsets_end
= offsets
;
5323 child_die
= die
->child
;
5324 while (child_die
&& child_die
->tag
)
5326 /* For each CHILD_DIE, find the corresponding child of
5327 ORIGIN_DIE. If there is more than one layer of
5328 DW_AT_abstract_origin, follow them all; there shouldn't be,
5329 but GCC versions at least through 4.4 generate this (GCC PR
5331 struct die_info
*child_origin_die
= child_die
;
5332 struct dwarf2_cu
*child_origin_cu
= cu
;
5336 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
5340 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
5344 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
5345 counterpart may exist. */
5346 if (child_origin_die
!= child_die
)
5348 if (child_die
->tag
!= child_origin_die
->tag
5349 && !(child_die
->tag
== DW_TAG_inlined_subroutine
5350 && child_origin_die
->tag
== DW_TAG_subprogram
))
5351 complaint (&symfile_complaints
,
5352 _("Child DIE 0x%x and its abstract origin 0x%x have "
5353 "different tags"), child_die
->offset
,
5354 child_origin_die
->offset
);
5355 if (child_origin_die
->parent
!= origin_die
)
5356 complaint (&symfile_complaints
,
5357 _("Child DIE 0x%x and its abstract origin 0x%x have "
5358 "different parents"), child_die
->offset
,
5359 child_origin_die
->offset
);
5361 *offsets_end
++ = child_origin_die
->offset
;
5363 child_die
= sibling_die (child_die
);
5365 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
5366 unsigned_int_compar
);
5367 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
5368 if (offsetp
[-1] == *offsetp
)
5369 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
5370 "to DIE 0x%x as their abstract origin"),
5371 die
->offset
, *offsetp
);
5374 origin_child_die
= origin_die
->child
;
5375 while (origin_child_die
&& origin_child_die
->tag
)
5377 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
5378 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
5380 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
5382 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
5383 process_die (origin_child_die
, origin_cu
);
5385 origin_child_die
= sibling_die (origin_child_die
);
5387 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
5389 do_cleanups (cleanups
);
5393 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5395 struct objfile
*objfile
= cu
->objfile
;
5396 struct context_stack
*new;
5399 struct die_info
*child_die
;
5400 struct attribute
*attr
, *call_line
, *call_file
;
5403 struct block
*block
;
5404 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
5405 VEC (symbolp
) *template_args
= NULL
;
5406 struct template_symbol
*templ_func
= NULL
;
5410 /* If we do not have call site information, we can't show the
5411 caller of this inlined function. That's too confusing, so
5412 only use the scope for local variables. */
5413 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
5414 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
5415 if (call_line
== NULL
|| call_file
== NULL
)
5417 read_lexical_block_scope (die
, cu
);
5422 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5424 name
= dwarf2_name (die
, cu
);
5426 /* Ignore functions with missing or empty names. These are actually
5427 illegal according to the DWARF standard. */
5430 complaint (&symfile_complaints
,
5431 _("missing name for subprogram DIE at %d"), die
->offset
);
5435 /* Ignore functions with missing or invalid low and high pc attributes. */
5436 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5438 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
5439 if (!attr
|| !DW_UNSND (attr
))
5440 complaint (&symfile_complaints
,
5441 _("cannot get low and high bounds for subprogram DIE at %d"),
5449 /* Record the function range for dwarf_decode_lines. */
5450 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
5452 /* If we have any template arguments, then we must allocate a
5453 different sort of symbol. */
5454 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
5456 if (child_die
->tag
== DW_TAG_template_type_param
5457 || child_die
->tag
== DW_TAG_template_value_param
)
5459 templ_func
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
5460 struct template_symbol
);
5461 templ_func
->base
.is_cplus_template_function
= 1;
5466 new = push_context (0, lowpc
);
5467 new->name
= new_symbol_full (die
, read_type_die (die
, cu
), cu
,
5468 (struct symbol
*) templ_func
);
5470 /* If there is a location expression for DW_AT_frame_base, record
5472 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
5474 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
5475 expression is being recorded directly in the function's symbol
5476 and not in a separate frame-base object. I guess this hack is
5477 to avoid adding some sort of frame-base adjunct/annex to the
5478 function's symbol :-(. The problem with doing this is that it
5479 results in a function symbol with a location expression that
5480 has nothing to do with the location of the function, ouch! The
5481 relationship should be: a function's symbol has-a frame base; a
5482 frame-base has-a location expression. */
5483 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
5485 cu
->list_in_scope
= &local_symbols
;
5487 if (die
->child
!= NULL
)
5489 child_die
= die
->child
;
5490 while (child_die
&& child_die
->tag
)
5492 if (child_die
->tag
== DW_TAG_template_type_param
5493 || child_die
->tag
== DW_TAG_template_value_param
)
5495 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
5498 VEC_safe_push (symbolp
, template_args
, arg
);
5501 process_die (child_die
, cu
);
5502 child_die
= sibling_die (child_die
);
5506 inherit_abstract_dies (die
, cu
);
5508 /* If we have a DW_AT_specification, we might need to import using
5509 directives from the context of the specification DIE. See the
5510 comment in determine_prefix. */
5511 if (cu
->language
== language_cplus
5512 && dwarf2_attr (die
, DW_AT_specification
, cu
))
5514 struct dwarf2_cu
*spec_cu
= cu
;
5515 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
5519 child_die
= spec_die
->child
;
5520 while (child_die
&& child_die
->tag
)
5522 if (child_die
->tag
== DW_TAG_imported_module
)
5523 process_die (child_die
, spec_cu
);
5524 child_die
= sibling_die (child_die
);
5527 /* In some cases, GCC generates specification DIEs that
5528 themselves contain DW_AT_specification attributes. */
5529 spec_die
= die_specification (spec_die
, &spec_cu
);
5533 new = pop_context ();
5534 /* Make a block for the local symbols within. */
5535 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
5536 lowpc
, highpc
, objfile
);
5538 /* For C++, set the block's scope. */
5539 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
5540 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
5541 determine_prefix (die
, cu
),
5542 processing_has_namespace_info
);
5544 /* If we have address ranges, record them. */
5545 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5547 /* Attach template arguments to function. */
5548 if (! VEC_empty (symbolp
, template_args
))
5550 gdb_assert (templ_func
!= NULL
);
5552 templ_func
->n_template_arguments
= VEC_length (symbolp
, template_args
);
5553 templ_func
->template_arguments
5554 = obstack_alloc (&objfile
->objfile_obstack
,
5555 (templ_func
->n_template_arguments
5556 * sizeof (struct symbol
*)));
5557 memcpy (templ_func
->template_arguments
,
5558 VEC_address (symbolp
, template_args
),
5559 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
5560 VEC_free (symbolp
, template_args
);
5563 /* In C++, we can have functions nested inside functions (e.g., when
5564 a function declares a class that has methods). This means that
5565 when we finish processing a function scope, we may need to go
5566 back to building a containing block's symbol lists. */
5567 local_symbols
= new->locals
;
5568 param_symbols
= new->params
;
5569 using_directives
= new->using_directives
;
5571 /* If we've finished processing a top-level function, subsequent
5572 symbols go in the file symbol list. */
5573 if (outermost_context_p ())
5574 cu
->list_in_scope
= &file_symbols
;
5577 /* Process all the DIES contained within a lexical block scope. Start
5578 a new scope, process the dies, and then close the scope. */
5581 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5583 struct objfile
*objfile
= cu
->objfile
;
5584 struct context_stack
*new;
5585 CORE_ADDR lowpc
, highpc
;
5586 struct die_info
*child_die
;
5589 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5591 /* Ignore blocks with missing or invalid low and high pc attributes. */
5592 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
5593 as multiple lexical blocks? Handling children in a sane way would
5594 be nasty. Might be easier to properly extend generic blocks to
5596 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
5601 push_context (0, lowpc
);
5602 if (die
->child
!= NULL
)
5604 child_die
= die
->child
;
5605 while (child_die
&& child_die
->tag
)
5607 process_die (child_die
, cu
);
5608 child_die
= sibling_die (child_die
);
5611 new = pop_context ();
5613 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
5616 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
5619 /* Note that recording ranges after traversing children, as we
5620 do here, means that recording a parent's ranges entails
5621 walking across all its children's ranges as they appear in
5622 the address map, which is quadratic behavior.
5624 It would be nicer to record the parent's ranges before
5625 traversing its children, simply overriding whatever you find
5626 there. But since we don't even decide whether to create a
5627 block until after we've traversed its children, that's hard
5629 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
5631 local_symbols
= new->locals
;
5632 using_directives
= new->using_directives
;
5635 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
5636 Return 1 if the attributes are present and valid, otherwise, return 0.
5637 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
5640 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
5641 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
5642 struct partial_symtab
*ranges_pst
)
5644 struct objfile
*objfile
= cu
->objfile
;
5645 struct comp_unit_head
*cu_header
= &cu
->header
;
5646 bfd
*obfd
= objfile
->obfd
;
5647 unsigned int addr_size
= cu_header
->addr_size
;
5648 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5649 /* Base address selection entry. */
5660 found_base
= cu
->base_known
;
5661 base
= cu
->base_address
;
5663 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
5664 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5666 complaint (&symfile_complaints
,
5667 _("Offset %d out of bounds for DW_AT_ranges attribute"),
5671 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5673 /* Read in the largest possible address. */
5674 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
5675 if ((marker
& mask
) == mask
)
5677 /* If we found the largest possible address, then
5678 read the base address. */
5679 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5680 buffer
+= 2 * addr_size
;
5681 offset
+= 2 * addr_size
;
5687 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
5691 CORE_ADDR range_beginning
, range_end
;
5693 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
5694 buffer
+= addr_size
;
5695 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
5696 buffer
+= addr_size
;
5697 offset
+= 2 * addr_size
;
5699 /* An end of list marker is a pair of zero addresses. */
5700 if (range_beginning
== 0 && range_end
== 0)
5701 /* Found the end of list entry. */
5704 /* Each base address selection entry is a pair of 2 values.
5705 The first is the largest possible address, the second is
5706 the base address. Check for a base address here. */
5707 if ((range_beginning
& mask
) == mask
)
5709 /* If we found the largest possible address, then
5710 read the base address. */
5711 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
5718 /* We have no valid base address for the ranges
5720 complaint (&symfile_complaints
,
5721 _("Invalid .debug_ranges data (no base address)"));
5725 range_beginning
+= base
;
5728 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
5729 addrmap_set_empty (objfile
->psymtabs_addrmap
,
5730 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
5733 /* FIXME: This is recording everything as a low-high
5734 segment of consecutive addresses. We should have a
5735 data structure for discontiguous block ranges
5739 low
= range_beginning
;
5745 if (range_beginning
< low
)
5746 low
= range_beginning
;
5747 if (range_end
> high
)
5753 /* If the first entry is an end-of-list marker, the range
5754 describes an empty scope, i.e. no instructions. */
5760 *high_return
= high
;
5764 /* Get low and high pc attributes from a die. Return 1 if the attributes
5765 are present and valid, otherwise, return 0. Return -1 if the range is
5766 discontinuous, i.e. derived from DW_AT_ranges information. */
5768 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
5769 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
5770 struct partial_symtab
*pst
)
5772 struct attribute
*attr
;
5777 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5780 high
= DW_ADDR (attr
);
5781 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5783 low
= DW_ADDR (attr
);
5785 /* Found high w/o low attribute. */
5788 /* Found consecutive range of addresses. */
5793 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5796 /* Value of the DW_AT_ranges attribute is the offset in the
5797 .debug_ranges section. */
5798 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
5800 /* Found discontinuous range of addresses. */
5808 /* When using the GNU linker, .gnu.linkonce. sections are used to
5809 eliminate duplicate copies of functions and vtables and such.
5810 The linker will arbitrarily choose one and discard the others.
5811 The AT_*_pc values for such functions refer to local labels in
5812 these sections. If the section from that file was discarded, the
5813 labels are not in the output, so the relocs get a value of 0.
5814 If this is a discarded function, mark the pc bounds as invalid,
5815 so that GDB will ignore it. */
5816 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
5824 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
5825 its low and high PC addresses. Do nothing if these addresses could not
5826 be determined. Otherwise, set LOWPC to the low address if it is smaller,
5827 and HIGHPC to the high address if greater than HIGHPC. */
5830 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
5831 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5832 struct dwarf2_cu
*cu
)
5834 CORE_ADDR low
, high
;
5835 struct die_info
*child
= die
->child
;
5837 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
5839 *lowpc
= min (*lowpc
, low
);
5840 *highpc
= max (*highpc
, high
);
5843 /* If the language does not allow nested subprograms (either inside
5844 subprograms or lexical blocks), we're done. */
5845 if (cu
->language
!= language_ada
)
5848 /* Check all the children of the given DIE. If it contains nested
5849 subprograms, then check their pc bounds. Likewise, we need to
5850 check lexical blocks as well, as they may also contain subprogram
5852 while (child
&& child
->tag
)
5854 if (child
->tag
== DW_TAG_subprogram
5855 || child
->tag
== DW_TAG_lexical_block
)
5856 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
5857 child
= sibling_die (child
);
5861 /* Get the low and high pc's represented by the scope DIE, and store
5862 them in *LOWPC and *HIGHPC. If the correct values can't be
5863 determined, set *LOWPC to -1 and *HIGHPC to 0. */
5866 get_scope_pc_bounds (struct die_info
*die
,
5867 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
5868 struct dwarf2_cu
*cu
)
5870 CORE_ADDR best_low
= (CORE_ADDR
) -1;
5871 CORE_ADDR best_high
= (CORE_ADDR
) 0;
5872 CORE_ADDR current_low
, current_high
;
5874 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
5876 best_low
= current_low
;
5877 best_high
= current_high
;
5881 struct die_info
*child
= die
->child
;
5883 while (child
&& child
->tag
)
5885 switch (child
->tag
) {
5886 case DW_TAG_subprogram
:
5887 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
5889 case DW_TAG_namespace
:
5891 /* FIXME: carlton/2004-01-16: Should we do this for
5892 DW_TAG_class_type/DW_TAG_structure_type, too? I think
5893 that current GCC's always emit the DIEs corresponding
5894 to definitions of methods of classes as children of a
5895 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
5896 the DIEs giving the declarations, which could be
5897 anywhere). But I don't see any reason why the
5898 standards says that they have to be there. */
5899 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
5901 if (current_low
!= ((CORE_ADDR
) -1))
5903 best_low
= min (best_low
, current_low
);
5904 best_high
= max (best_high
, current_high
);
5912 child
= sibling_die (child
);
5917 *highpc
= best_high
;
5920 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
5923 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
5924 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
5926 struct attribute
*attr
;
5928 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
5931 CORE_ADDR high
= DW_ADDR (attr
);
5933 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
5936 CORE_ADDR low
= DW_ADDR (attr
);
5938 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
5942 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
5945 bfd
*obfd
= cu
->objfile
->obfd
;
5947 /* The value of the DW_AT_ranges attribute is the offset of the
5948 address range list in the .debug_ranges section. */
5949 unsigned long offset
= DW_UNSND (attr
);
5950 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
5952 /* For some target architectures, but not others, the
5953 read_address function sign-extends the addresses it returns.
5954 To recognize base address selection entries, we need a
5956 unsigned int addr_size
= cu
->header
.addr_size
;
5957 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
5959 /* The base address, to which the next pair is relative. Note
5960 that this 'base' is a DWARF concept: most entries in a range
5961 list are relative, to reduce the number of relocs against the
5962 debugging information. This is separate from this function's
5963 'baseaddr' argument, which GDB uses to relocate debugging
5964 information from a shared library based on the address at
5965 which the library was loaded. */
5966 CORE_ADDR base
= cu
->base_address
;
5967 int base_known
= cu
->base_known
;
5969 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
5970 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
5972 complaint (&symfile_complaints
,
5973 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
5980 unsigned int bytes_read
;
5981 CORE_ADDR start
, end
;
5983 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
5984 buffer
+= bytes_read
;
5985 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
5986 buffer
+= bytes_read
;
5988 /* Did we find the end of the range list? */
5989 if (start
== 0 && end
== 0)
5992 /* Did we find a base address selection entry? */
5993 else if ((start
& base_select_mask
) == base_select_mask
)
5999 /* We found an ordinary address range. */
6004 complaint (&symfile_complaints
,
6005 _("Invalid .debug_ranges data (no base address)"));
6009 record_block_range (block
,
6010 baseaddr
+ base
+ start
,
6011 baseaddr
+ base
+ end
- 1);
6017 /* Add an aggregate field to the field list. */
6020 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
6021 struct dwarf2_cu
*cu
)
6023 struct objfile
*objfile
= cu
->objfile
;
6024 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6025 struct nextfield
*new_field
;
6026 struct attribute
*attr
;
6028 char *fieldname
= "";
6030 /* Allocate a new field list entry and link it in. */
6031 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
6032 make_cleanup (xfree
, new_field
);
6033 memset (new_field
, 0, sizeof (struct nextfield
));
6035 if (die
->tag
== DW_TAG_inheritance
)
6037 new_field
->next
= fip
->baseclasses
;
6038 fip
->baseclasses
= new_field
;
6042 new_field
->next
= fip
->fields
;
6043 fip
->fields
= new_field
;
6047 /* Handle accessibility and virtuality of field.
6048 The default accessibility for members is public, the default
6049 accessibility for inheritance is private. */
6050 if (die
->tag
!= DW_TAG_inheritance
)
6051 new_field
->accessibility
= DW_ACCESS_public
;
6053 new_field
->accessibility
= DW_ACCESS_private
;
6054 new_field
->virtuality
= DW_VIRTUALITY_none
;
6056 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6058 new_field
->accessibility
= DW_UNSND (attr
);
6059 if (new_field
->accessibility
!= DW_ACCESS_public
)
6060 fip
->non_public_fields
= 1;
6061 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6063 new_field
->virtuality
= DW_UNSND (attr
);
6065 fp
= &new_field
->field
;
6067 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
6069 /* Data member other than a C++ static data member. */
6071 /* Get type of field. */
6072 fp
->type
= die_type (die
, cu
);
6074 SET_FIELD_BITPOS (*fp
, 0);
6076 /* Get bit size of field (zero if none). */
6077 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
6080 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
6084 FIELD_BITSIZE (*fp
) = 0;
6087 /* Get bit offset of field. */
6088 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6091 int byte_offset
= 0;
6093 if (attr_form_is_section_offset (attr
))
6094 dwarf2_complex_location_expr_complaint ();
6095 else if (attr_form_is_constant (attr
))
6096 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6097 else if (attr_form_is_block (attr
))
6098 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6100 dwarf2_complex_location_expr_complaint ();
6102 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6104 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
6107 if (gdbarch_bits_big_endian (gdbarch
))
6109 /* For big endian bits, the DW_AT_bit_offset gives the
6110 additional bit offset from the MSB of the containing
6111 anonymous object to the MSB of the field. We don't
6112 have to do anything special since we don't need to
6113 know the size of the anonymous object. */
6114 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
6118 /* For little endian bits, compute the bit offset to the
6119 MSB of the anonymous object, subtract off the number of
6120 bits from the MSB of the field to the MSB of the
6121 object, and then subtract off the number of bits of
6122 the field itself. The result is the bit offset of
6123 the LSB of the field. */
6125 int bit_offset
= DW_UNSND (attr
);
6127 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6130 /* The size of the anonymous object containing
6131 the bit field is explicit, so use the
6132 indicated size (in bytes). */
6133 anonymous_size
= DW_UNSND (attr
);
6137 /* The size of the anonymous object containing
6138 the bit field must be inferred from the type
6139 attribute of the data member containing the
6141 anonymous_size
= TYPE_LENGTH (fp
->type
);
6143 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
6144 - bit_offset
- FIELD_BITSIZE (*fp
);
6148 /* Get name of field. */
6149 fieldname
= dwarf2_name (die
, cu
);
6150 if (fieldname
== NULL
)
6153 /* The name is already allocated along with this objfile, so we don't
6154 need to duplicate it for the type. */
6155 fp
->name
= fieldname
;
6157 /* Change accessibility for artificial fields (e.g. virtual table
6158 pointer or virtual base class pointer) to private. */
6159 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
6161 FIELD_ARTIFICIAL (*fp
) = 1;
6162 new_field
->accessibility
= DW_ACCESS_private
;
6163 fip
->non_public_fields
= 1;
6166 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
6168 /* C++ static member. */
6170 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
6171 is a declaration, but all versions of G++ as of this writing
6172 (so through at least 3.2.1) incorrectly generate
6173 DW_TAG_variable tags. */
6177 /* Get name of field. */
6178 fieldname
= dwarf2_name (die
, cu
);
6179 if (fieldname
== NULL
)
6182 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
6184 /* Only create a symbol if this is an external value.
6185 new_symbol checks this and puts the value in the global symbol
6186 table, which we want. If it is not external, new_symbol
6187 will try to put the value in cu->list_in_scope which is wrong. */
6188 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
6190 /* A static const member, not much different than an enum as far as
6191 we're concerned, except that we can support more types. */
6192 new_symbol (die
, NULL
, cu
);
6195 /* Get physical name. */
6196 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6198 /* The name is already allocated along with this objfile, so we don't
6199 need to duplicate it for the type. */
6200 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
6201 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6202 FIELD_NAME (*fp
) = fieldname
;
6204 else if (die
->tag
== DW_TAG_inheritance
)
6206 /* C++ base class field. */
6207 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
6210 int byte_offset
= 0;
6212 if (attr_form_is_section_offset (attr
))
6213 dwarf2_complex_location_expr_complaint ();
6214 else if (attr_form_is_constant (attr
))
6215 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
6216 else if (attr_form_is_block (attr
))
6217 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6219 dwarf2_complex_location_expr_complaint ();
6221 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
6223 FIELD_BITSIZE (*fp
) = 0;
6224 FIELD_TYPE (*fp
) = die_type (die
, cu
);
6225 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
6226 fip
->nbaseclasses
++;
6230 /* Add a typedef defined in the scope of the FIP's class. */
6233 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
6234 struct dwarf2_cu
*cu
)
6236 struct objfile
*objfile
= cu
->objfile
;
6237 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6238 struct typedef_field_list
*new_field
;
6239 struct attribute
*attr
;
6240 struct typedef_field
*fp
;
6241 char *fieldname
= "";
6243 /* Allocate a new field list entry and link it in. */
6244 new_field
= xzalloc (sizeof (*new_field
));
6245 make_cleanup (xfree
, new_field
);
6247 gdb_assert (die
->tag
== DW_TAG_typedef
);
6249 fp
= &new_field
->field
;
6251 /* Get name of field. */
6252 fp
->name
= dwarf2_name (die
, cu
);
6253 if (fp
->name
== NULL
)
6256 fp
->type
= read_type_die (die
, cu
);
6258 new_field
->next
= fip
->typedef_field_list
;
6259 fip
->typedef_field_list
= new_field
;
6260 fip
->typedef_field_list_count
++;
6263 /* Create the vector of fields, and attach it to the type. */
6266 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
6267 struct dwarf2_cu
*cu
)
6269 int nfields
= fip
->nfields
;
6271 /* Record the field count, allocate space for the array of fields,
6272 and create blank accessibility bitfields if necessary. */
6273 TYPE_NFIELDS (type
) = nfields
;
6274 TYPE_FIELDS (type
) = (struct field
*)
6275 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
6276 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
6278 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
6280 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6282 TYPE_FIELD_PRIVATE_BITS (type
) =
6283 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6284 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
6286 TYPE_FIELD_PROTECTED_BITS (type
) =
6287 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6288 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
6290 TYPE_FIELD_IGNORE_BITS (type
) =
6291 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
6292 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
6295 /* If the type has baseclasses, allocate and clear a bit vector for
6296 TYPE_FIELD_VIRTUAL_BITS. */
6297 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
6299 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
6300 unsigned char *pointer
;
6302 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6303 pointer
= TYPE_ALLOC (type
, num_bytes
);
6304 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
6305 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
6306 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
6309 /* Copy the saved-up fields into the field vector. Start from the head
6310 of the list, adding to the tail of the field array, so that they end
6311 up in the same order in the array in which they were added to the list. */
6312 while (nfields
-- > 0)
6314 struct nextfield
*fieldp
;
6318 fieldp
= fip
->fields
;
6319 fip
->fields
= fieldp
->next
;
6323 fieldp
= fip
->baseclasses
;
6324 fip
->baseclasses
= fieldp
->next
;
6327 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
6328 switch (fieldp
->accessibility
)
6330 case DW_ACCESS_private
:
6331 if (cu
->language
!= language_ada
)
6332 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
6335 case DW_ACCESS_protected
:
6336 if (cu
->language
!= language_ada
)
6337 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
6340 case DW_ACCESS_public
:
6344 /* Unknown accessibility. Complain and treat it as public. */
6346 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
6347 fieldp
->accessibility
);
6351 if (nfields
< fip
->nbaseclasses
)
6353 switch (fieldp
->virtuality
)
6355 case DW_VIRTUALITY_virtual
:
6356 case DW_VIRTUALITY_pure_virtual
:
6357 if (cu
->language
== language_ada
)
6358 error ("unexpected virtuality in component of Ada type");
6359 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
6366 /* Add a member function to the proper fieldlist. */
6369 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
6370 struct type
*type
, struct dwarf2_cu
*cu
)
6372 struct objfile
*objfile
= cu
->objfile
;
6373 struct attribute
*attr
;
6374 struct fnfieldlist
*flp
;
6376 struct fn_field
*fnp
;
6378 struct nextfnfield
*new_fnfield
;
6379 struct type
*this_type
;
6381 if (cu
->language
== language_ada
)
6382 error ("unexpected member function in Ada type");
6384 /* Get name of member function. */
6385 fieldname
= dwarf2_name (die
, cu
);
6386 if (fieldname
== NULL
)
6389 /* Look up member function name in fieldlist. */
6390 for (i
= 0; i
< fip
->nfnfields
; i
++)
6392 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
6396 /* Create new list element if necessary. */
6397 if (i
< fip
->nfnfields
)
6398 flp
= &fip
->fnfieldlists
[i
];
6401 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
6403 fip
->fnfieldlists
= (struct fnfieldlist
*)
6404 xrealloc (fip
->fnfieldlists
,
6405 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
6406 * sizeof (struct fnfieldlist
));
6407 if (fip
->nfnfields
== 0)
6408 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
6410 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
6411 flp
->name
= fieldname
;
6414 i
= fip
->nfnfields
++;
6417 /* Create a new member function field and chain it to the field list
6419 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
6420 make_cleanup (xfree
, new_fnfield
);
6421 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
6422 new_fnfield
->next
= flp
->head
;
6423 flp
->head
= new_fnfield
;
6426 /* Fill in the member function field info. */
6427 fnp
= &new_fnfield
->fnfield
;
6429 /* Delay processing of the physname until later. */
6430 if (cu
->language
== language_cplus
|| cu
->language
== language_java
)
6432 add_to_method_list (type
, i
, flp
->length
- 1, fieldname
,
6437 char *physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
6438 fnp
->physname
= physname
? physname
: "";
6441 fnp
->type
= alloc_type (objfile
);
6442 this_type
= read_type_die (die
, cu
);
6443 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
6445 int nparams
= TYPE_NFIELDS (this_type
);
6447 /* TYPE is the domain of this method, and THIS_TYPE is the type
6448 of the method itself (TYPE_CODE_METHOD). */
6449 smash_to_method_type (fnp
->type
, type
,
6450 TYPE_TARGET_TYPE (this_type
),
6451 TYPE_FIELDS (this_type
),
6452 TYPE_NFIELDS (this_type
),
6453 TYPE_VARARGS (this_type
));
6455 /* Handle static member functions.
6456 Dwarf2 has no clean way to discern C++ static and non-static
6457 member functions. G++ helps GDB by marking the first
6458 parameter for non-static member functions (which is the
6459 this pointer) as artificial. We obtain this information
6460 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
6461 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
6462 fnp
->voffset
= VOFFSET_STATIC
;
6465 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
6466 dwarf2_full_name (fieldname
, die
, cu
));
6468 /* Get fcontext from DW_AT_containing_type if present. */
6469 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6470 fnp
->fcontext
= die_containing_type (die
, cu
);
6472 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
6473 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
6475 /* Get accessibility. */
6476 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
6479 switch (DW_UNSND (attr
))
6481 case DW_ACCESS_private
:
6482 fnp
->is_private
= 1;
6484 case DW_ACCESS_protected
:
6485 fnp
->is_protected
= 1;
6490 /* Check for artificial methods. */
6491 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
6492 if (attr
&& DW_UNSND (attr
) != 0)
6493 fnp
->is_artificial
= 1;
6495 /* Get index in virtual function table if it is a virtual member
6496 function. For older versions of GCC, this is an offset in the
6497 appropriate virtual table, as specified by DW_AT_containing_type.
6498 For everyone else, it is an expression to be evaluated relative
6499 to the object address. */
6501 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
6504 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
6506 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
6508 /* Old-style GCC. */
6509 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
6511 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6512 || (DW_BLOCK (attr
)->size
> 1
6513 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
6514 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
6516 struct dwarf_block blk
;
6519 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
6521 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
6522 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
6523 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
6524 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
6525 dwarf2_complex_location_expr_complaint ();
6527 fnp
->voffset
/= cu
->header
.addr_size
;
6531 dwarf2_complex_location_expr_complaint ();
6534 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
6536 else if (attr_form_is_section_offset (attr
))
6538 dwarf2_complex_location_expr_complaint ();
6542 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
6548 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
6549 if (attr
&& DW_UNSND (attr
))
6551 /* GCC does this, as of 2008-08-25; PR debug/37237. */
6552 complaint (&symfile_complaints
,
6553 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
6554 fieldname
, die
->offset
);
6555 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6556 TYPE_CPLUS_DYNAMIC (type
) = 1;
6561 /* Create the vector of member function fields, and attach it to the type. */
6564 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
6565 struct dwarf2_cu
*cu
)
6567 struct fnfieldlist
*flp
;
6568 int total_length
= 0;
6571 if (cu
->language
== language_ada
)
6572 error ("unexpected member functions in Ada type");
6574 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6575 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
6576 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
6578 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
6580 struct nextfnfield
*nfp
= flp
->head
;
6581 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
6584 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
6585 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
6586 fn_flp
->fn_fields
= (struct fn_field
*)
6587 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
6588 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
6589 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
6591 total_length
+= flp
->length
;
6594 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
6595 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
6598 /* Returns non-zero if NAME is the name of a vtable member in CU's
6599 language, zero otherwise. */
6601 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
6603 static const char vptr
[] = "_vptr";
6604 static const char vtable
[] = "vtable";
6606 /* Look for the C++ and Java forms of the vtable. */
6607 if ((cu
->language
== language_java
6608 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
6609 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
6610 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
6616 /* GCC outputs unnamed structures that are really pointers to member
6617 functions, with the ABI-specified layout. If TYPE describes
6618 such a structure, smash it into a member function type.
6620 GCC shouldn't do this; it should just output pointer to member DIEs.
6621 This is GCC PR debug/28767. */
6624 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
6626 struct type
*pfn_type
, *domain_type
, *new_type
;
6628 /* Check for a structure with no name and two children. */
6629 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
6632 /* Check for __pfn and __delta members. */
6633 if (TYPE_FIELD_NAME (type
, 0) == NULL
6634 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
6635 || TYPE_FIELD_NAME (type
, 1) == NULL
6636 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
6639 /* Find the type of the method. */
6640 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
6641 if (pfn_type
== NULL
6642 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
6643 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
6646 /* Look for the "this" argument. */
6647 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
6648 if (TYPE_NFIELDS (pfn_type
) == 0
6649 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
6650 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
6653 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
6654 new_type
= alloc_type (objfile
);
6655 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
6656 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
6657 TYPE_VARARGS (pfn_type
));
6658 smash_to_methodptr_type (type
, new_type
);
6661 /* Called when we find the DIE that starts a structure or union scope
6662 (definition) to create a type for the structure or union. Fill in
6663 the type's name and general properties; the members will not be
6664 processed until process_structure_type.
6666 NOTE: we need to call these functions regardless of whether or not the
6667 DIE has a DW_AT_name attribute, since it might be an anonymous
6668 structure or union. This gets the type entered into our set of
6671 However, if the structure is incomplete (an opaque struct/union)
6672 then suppress creating a symbol table entry for it since gdb only
6673 wants to find the one with the complete definition. Note that if
6674 it is complete, we just call new_symbol, which does it's own
6675 checking about whether the struct/union is anonymous or not (and
6676 suppresses creating a symbol table entry itself). */
6678 static struct type
*
6679 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6681 struct objfile
*objfile
= cu
->objfile
;
6683 struct attribute
*attr
;
6686 /* If the definition of this type lives in .debug_types, read that type.
6687 Don't follow DW_AT_specification though, that will take us back up
6688 the chain and we want to go down. */
6689 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
6692 struct dwarf2_cu
*type_cu
= cu
;
6693 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
6695 /* We could just recurse on read_structure_type, but we need to call
6696 get_die_type to ensure only one type for this DIE is created.
6697 This is important, for example, because for c++ classes we need
6698 TYPE_NAME set which is only done by new_symbol. Blech. */
6699 type
= read_type_die (type_die
, type_cu
);
6701 /* TYPE_CU may not be the same as CU.
6702 Ensure TYPE is recorded in CU's type_hash table. */
6703 return set_die_type (die
, type
, cu
);
6706 type
= alloc_type (objfile
);
6707 INIT_CPLUS_SPECIFIC (type
);
6709 name
= dwarf2_name (die
, cu
);
6712 if (cu
->language
== language_cplus
6713 || cu
->language
== language_java
)
6715 char *full_name
= (char *) dwarf2_full_name (name
, die
, cu
);
6717 /* dwarf2_full_name might have already finished building the DIE's
6718 type. If so, there is no need to continue. */
6719 if (get_die_type (die
, cu
) != NULL
)
6720 return get_die_type (die
, cu
);
6722 TYPE_TAG_NAME (type
) = full_name
;
6723 if (die
->tag
== DW_TAG_structure_type
6724 || die
->tag
== DW_TAG_class_type
)
6725 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6729 /* The name is already allocated along with this objfile, so
6730 we don't need to duplicate it for the type. */
6731 TYPE_TAG_NAME (type
) = (char *) name
;
6732 if (die
->tag
== DW_TAG_class_type
)
6733 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
6737 if (die
->tag
== DW_TAG_structure_type
)
6739 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
6741 else if (die
->tag
== DW_TAG_union_type
)
6743 TYPE_CODE (type
) = TYPE_CODE_UNION
;
6747 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
6750 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
6751 TYPE_DECLARED_CLASS (type
) = 1;
6753 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6756 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6760 TYPE_LENGTH (type
) = 0;
6763 TYPE_STUB_SUPPORTED (type
) = 1;
6764 if (die_is_declaration (die
, cu
))
6765 TYPE_STUB (type
) = 1;
6766 else if (attr
== NULL
&& die
->child
== NULL
6767 && producer_is_realview (cu
->producer
))
6768 /* RealView does not output the required DW_AT_declaration
6769 on incomplete types. */
6770 TYPE_STUB (type
) = 1;
6772 /* We need to add the type field to the die immediately so we don't
6773 infinitely recurse when dealing with pointers to the structure
6774 type within the structure itself. */
6775 set_die_type (die
, type
, cu
);
6777 /* set_die_type should be already done. */
6778 set_descriptive_type (type
, die
, cu
);
6783 /* Finish creating a structure or union type, including filling in
6784 its members and creating a symbol for it. */
6787 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
6789 struct objfile
*objfile
= cu
->objfile
;
6790 struct die_info
*child_die
= die
->child
;
6793 type
= get_die_type (die
, cu
);
6795 type
= read_structure_type (die
, cu
);
6797 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
6799 struct field_info fi
;
6800 struct die_info
*child_die
;
6801 VEC (symbolp
) *template_args
= NULL
;
6802 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
6804 memset (&fi
, 0, sizeof (struct field_info
));
6806 child_die
= die
->child
;
6808 while (child_die
&& child_die
->tag
)
6810 if (child_die
->tag
== DW_TAG_member
6811 || child_die
->tag
== DW_TAG_variable
)
6813 /* NOTE: carlton/2002-11-05: A C++ static data member
6814 should be a DW_TAG_member that is a declaration, but
6815 all versions of G++ as of this writing (so through at
6816 least 3.2.1) incorrectly generate DW_TAG_variable
6817 tags for them instead. */
6818 dwarf2_add_field (&fi
, child_die
, cu
);
6820 else if (child_die
->tag
== DW_TAG_subprogram
)
6822 /* C++ member function. */
6823 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
6825 else if (child_die
->tag
== DW_TAG_inheritance
)
6827 /* C++ base class field. */
6828 dwarf2_add_field (&fi
, child_die
, cu
);
6830 else if (child_die
->tag
== DW_TAG_typedef
)
6831 dwarf2_add_typedef (&fi
, child_die
, cu
);
6832 else if (child_die
->tag
== DW_TAG_template_type_param
6833 || child_die
->tag
== DW_TAG_template_value_param
)
6835 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
6838 VEC_safe_push (symbolp
, template_args
, arg
);
6841 child_die
= sibling_die (child_die
);
6844 /* Attach template arguments to type. */
6845 if (! VEC_empty (symbolp
, template_args
))
6847 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6848 TYPE_N_TEMPLATE_ARGUMENTS (type
)
6849 = VEC_length (symbolp
, template_args
);
6850 TYPE_TEMPLATE_ARGUMENTS (type
)
6851 = obstack_alloc (&objfile
->objfile_obstack
,
6852 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6853 * sizeof (struct symbol
*)));
6854 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
6855 VEC_address (symbolp
, template_args
),
6856 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
6857 * sizeof (struct symbol
*)));
6858 VEC_free (symbolp
, template_args
);
6861 /* Attach fields and member functions to the type. */
6863 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
6866 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
6868 /* Get the type which refers to the base class (possibly this
6869 class itself) which contains the vtable pointer for the current
6870 class from the DW_AT_containing_type attribute. This use of
6871 DW_AT_containing_type is a GNU extension. */
6873 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
6875 struct type
*t
= die_containing_type (die
, cu
);
6877 TYPE_VPTR_BASETYPE (type
) = t
;
6882 /* Our own class provides vtbl ptr. */
6883 for (i
= TYPE_NFIELDS (t
) - 1;
6884 i
>= TYPE_N_BASECLASSES (t
);
6887 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
6889 if (is_vtable_name (fieldname
, cu
))
6891 TYPE_VPTR_FIELDNO (type
) = i
;
6896 /* Complain if virtual function table field not found. */
6897 if (i
< TYPE_N_BASECLASSES (t
))
6898 complaint (&symfile_complaints
,
6899 _("virtual function table pointer not found when defining class '%s'"),
6900 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
6905 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
6908 else if (cu
->producer
6909 && strncmp (cu
->producer
,
6910 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
6912 /* The IBM XLC compiler does not provide direct indication
6913 of the containing type, but the vtable pointer is
6914 always named __vfp. */
6918 for (i
= TYPE_NFIELDS (type
) - 1;
6919 i
>= TYPE_N_BASECLASSES (type
);
6922 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
6924 TYPE_VPTR_FIELDNO (type
) = i
;
6925 TYPE_VPTR_BASETYPE (type
) = type
;
6932 /* Copy fi.typedef_field_list linked list elements content into the
6933 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
6934 if (fi
.typedef_field_list
)
6936 int i
= fi
.typedef_field_list_count
;
6938 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
6939 TYPE_TYPEDEF_FIELD_ARRAY (type
)
6940 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
6941 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
6943 /* Reverse the list order to keep the debug info elements order. */
6946 struct typedef_field
*dest
, *src
;
6948 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
6949 src
= &fi
.typedef_field_list
->field
;
6950 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
6955 do_cleanups (back_to
);
6958 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
6960 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
6961 snapshots) has been known to create a die giving a declaration
6962 for a class that has, as a child, a die giving a definition for a
6963 nested class. So we have to process our children even if the
6964 current die is a declaration. Normally, of course, a declaration
6965 won't have any children at all. */
6967 while (child_die
!= NULL
&& child_die
->tag
)
6969 if (child_die
->tag
== DW_TAG_member
6970 || child_die
->tag
== DW_TAG_variable
6971 || child_die
->tag
== DW_TAG_inheritance
6972 || child_die
->tag
== DW_TAG_template_value_param
6973 || child_die
->tag
== DW_TAG_template_type_param
)
6978 process_die (child_die
, cu
);
6980 child_die
= sibling_die (child_die
);
6983 /* Do not consider external references. According to the DWARF standard,
6984 these DIEs are identified by the fact that they have no byte_size
6985 attribute, and a declaration attribute. */
6986 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
6987 || !die_is_declaration (die
, cu
))
6988 new_symbol (die
, type
, cu
);
6991 /* Given a DW_AT_enumeration_type die, set its type. We do not
6992 complete the type's fields yet, or create any symbols. */
6994 static struct type
*
6995 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6997 struct objfile
*objfile
= cu
->objfile
;
6999 struct attribute
*attr
;
7002 /* If the definition of this type lives in .debug_types, read that type.
7003 Don't follow DW_AT_specification though, that will take us back up
7004 the chain and we want to go down. */
7005 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
7008 struct dwarf2_cu
*type_cu
= cu
;
7009 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
7011 type
= read_type_die (type_die
, type_cu
);
7013 /* TYPE_CU may not be the same as CU.
7014 Ensure TYPE is recorded in CU's type_hash table. */
7015 return set_die_type (die
, type
, cu
);
7018 type
= alloc_type (objfile
);
7020 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
7021 name
= dwarf2_full_name (NULL
, die
, cu
);
7023 TYPE_TAG_NAME (type
) = (char *) name
;
7025 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7028 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7032 TYPE_LENGTH (type
) = 0;
7035 /* The enumeration DIE can be incomplete. In Ada, any type can be
7036 declared as private in the package spec, and then defined only
7037 inside the package body. Such types are known as Taft Amendment
7038 Types. When another package uses such a type, an incomplete DIE
7039 may be generated by the compiler. */
7040 if (die_is_declaration (die
, cu
))
7041 TYPE_STUB (type
) = 1;
7043 return set_die_type (die
, type
, cu
);
7046 /* Given a pointer to a die which begins an enumeration, process all
7047 the dies that define the members of the enumeration, and create the
7048 symbol for the enumeration type.
7050 NOTE: We reverse the order of the element list. */
7053 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
7055 struct type
*this_type
;
7057 this_type
= get_die_type (die
, cu
);
7058 if (this_type
== NULL
)
7059 this_type
= read_enumeration_type (die
, cu
);
7061 if (die
->child
!= NULL
)
7063 struct die_info
*child_die
;
7065 struct field
*fields
= NULL
;
7067 int unsigned_enum
= 1;
7070 child_die
= die
->child
;
7071 while (child_die
&& child_die
->tag
)
7073 if (child_die
->tag
!= DW_TAG_enumerator
)
7075 process_die (child_die
, cu
);
7079 name
= dwarf2_name (child_die
, cu
);
7082 sym
= new_symbol (child_die
, this_type
, cu
);
7083 if (SYMBOL_VALUE (sym
) < 0)
7086 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
7088 fields
= (struct field
*)
7090 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
7091 * sizeof (struct field
));
7094 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
7095 FIELD_TYPE (fields
[num_fields
]) = NULL
;
7096 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
7097 FIELD_BITSIZE (fields
[num_fields
]) = 0;
7103 child_die
= sibling_die (child_die
);
7108 TYPE_NFIELDS (this_type
) = num_fields
;
7109 TYPE_FIELDS (this_type
) = (struct field
*)
7110 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
7111 memcpy (TYPE_FIELDS (this_type
), fields
,
7112 sizeof (struct field
) * num_fields
);
7116 TYPE_UNSIGNED (this_type
) = 1;
7119 new_symbol (die
, this_type
, cu
);
7122 /* Extract all information from a DW_TAG_array_type DIE and put it in
7123 the DIE's type field. For now, this only handles one dimensional
7126 static struct type
*
7127 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7129 struct objfile
*objfile
= cu
->objfile
;
7130 struct die_info
*child_die
;
7132 struct type
*element_type
, *range_type
, *index_type
;
7133 struct type
**range_types
= NULL
;
7134 struct attribute
*attr
;
7136 struct cleanup
*back_to
;
7139 element_type
= die_type (die
, cu
);
7141 /* The die_type call above may have already set the type for this DIE. */
7142 type
= get_die_type (die
, cu
);
7146 /* Irix 6.2 native cc creates array types without children for
7147 arrays with unspecified length. */
7148 if (die
->child
== NULL
)
7150 index_type
= objfile_type (objfile
)->builtin_int
;
7151 range_type
= create_range_type (NULL
, index_type
, 0, -1);
7152 type
= create_array_type (NULL
, element_type
, range_type
);
7153 return set_die_type (die
, type
, cu
);
7156 back_to
= make_cleanup (null_cleanup
, NULL
);
7157 child_die
= die
->child
;
7158 while (child_die
&& child_die
->tag
)
7160 if (child_die
->tag
== DW_TAG_subrange_type
)
7162 struct type
*child_type
= read_type_die (child_die
, cu
);
7164 if (child_type
!= NULL
)
7166 /* The range type was succesfully read. Save it for
7167 the array type creation. */
7168 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
7170 range_types
= (struct type
**)
7171 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
7172 * sizeof (struct type
*));
7174 make_cleanup (free_current_contents
, &range_types
);
7176 range_types
[ndim
++] = child_type
;
7179 child_die
= sibling_die (child_die
);
7182 /* Dwarf2 dimensions are output from left to right, create the
7183 necessary array types in backwards order. */
7185 type
= element_type
;
7187 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
7192 type
= create_array_type (NULL
, type
, range_types
[i
++]);
7197 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
7200 /* Understand Dwarf2 support for vector types (like they occur on
7201 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
7202 array type. This is not part of the Dwarf2/3 standard yet, but a
7203 custom vendor extension. The main difference between a regular
7204 array and the vector variant is that vectors are passed by value
7206 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
7208 make_vector_type (type
);
7210 name
= dwarf2_name (die
, cu
);
7212 TYPE_NAME (type
) = name
;
7214 /* Install the type in the die. */
7215 set_die_type (die
, type
, cu
);
7217 /* set_die_type should be already done. */
7218 set_descriptive_type (type
, die
, cu
);
7220 do_cleanups (back_to
);
7225 static enum dwarf_array_dim_ordering
7226 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
7228 struct attribute
*attr
;
7230 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
7232 if (attr
) return DW_SND (attr
);
7235 GNU F77 is a special case, as at 08/2004 array type info is the
7236 opposite order to the dwarf2 specification, but data is still
7237 laid out as per normal fortran.
7239 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
7243 if (cu
->language
== language_fortran
7244 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
7246 return DW_ORD_row_major
;
7249 switch (cu
->language_defn
->la_array_ordering
)
7251 case array_column_major
:
7252 return DW_ORD_col_major
;
7253 case array_row_major
:
7255 return DW_ORD_row_major
;
7259 /* Extract all information from a DW_TAG_set_type DIE and put it in
7260 the DIE's type field. */
7262 static struct type
*
7263 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7265 struct type
*domain_type
, *set_type
;
7266 struct attribute
*attr
;
7268 domain_type
= die_type (die
, cu
);
7270 /* The die_type call above may have already set the type for this DIE. */
7271 set_type
= get_die_type (die
, cu
);
7275 set_type
= create_set_type (NULL
, domain_type
);
7277 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7279 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
7281 return set_die_type (die
, set_type
, cu
);
7284 /* First cut: install each common block member as a global variable. */
7287 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
7289 struct die_info
*child_die
;
7290 struct attribute
*attr
;
7292 CORE_ADDR base
= (CORE_ADDR
) 0;
7294 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7297 /* Support the .debug_loc offsets */
7298 if (attr_form_is_block (attr
))
7300 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
7302 else if (attr_form_is_section_offset (attr
))
7304 dwarf2_complex_location_expr_complaint ();
7308 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7309 "common block member");
7312 if (die
->child
!= NULL
)
7314 child_die
= die
->child
;
7315 while (child_die
&& child_die
->tag
)
7317 sym
= new_symbol (child_die
, NULL
, cu
);
7318 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
7319 if (sym
!= NULL
&& attr
!= NULL
)
7321 CORE_ADDR byte_offset
= 0;
7323 if (attr_form_is_section_offset (attr
))
7324 dwarf2_complex_location_expr_complaint ();
7325 else if (attr_form_is_constant (attr
))
7326 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
7327 else if (attr_form_is_block (attr
))
7328 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
7330 dwarf2_complex_location_expr_complaint ();
7332 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
7333 add_symbol_to_list (sym
, &global_symbols
);
7335 child_die
= sibling_die (child_die
);
7340 /* Create a type for a C++ namespace. */
7342 static struct type
*
7343 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7345 struct objfile
*objfile
= cu
->objfile
;
7346 const char *previous_prefix
, *name
;
7350 /* For extensions, reuse the type of the original namespace. */
7351 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
7353 struct die_info
*ext_die
;
7354 struct dwarf2_cu
*ext_cu
= cu
;
7356 ext_die
= dwarf2_extension (die
, &ext_cu
);
7357 type
= read_type_die (ext_die
, ext_cu
);
7359 /* EXT_CU may not be the same as CU.
7360 Ensure TYPE is recorded in CU's type_hash table. */
7361 return set_die_type (die
, type
, cu
);
7364 name
= namespace_name (die
, &is_anonymous
, cu
);
7366 /* Now build the name of the current namespace. */
7368 previous_prefix
= determine_prefix (die
, cu
);
7369 if (previous_prefix
[0] != '\0')
7370 name
= typename_concat (&objfile
->objfile_obstack
,
7371 previous_prefix
, name
, 0, cu
);
7373 /* Create the type. */
7374 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
7376 TYPE_NAME (type
) = (char *) name
;
7377 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7379 return set_die_type (die
, type
, cu
);
7382 /* Read a C++ namespace. */
7385 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
7387 struct objfile
*objfile
= cu
->objfile
;
7391 /* Add a symbol associated to this if we haven't seen the namespace
7392 before. Also, add a using directive if it's an anonymous
7395 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
7399 type
= read_type_die (die
, cu
);
7400 new_symbol (die
, type
, cu
);
7402 name
= namespace_name (die
, &is_anonymous
, cu
);
7405 const char *previous_prefix
= determine_prefix (die
, cu
);
7407 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
7408 NULL
, &objfile
->objfile_obstack
);
7412 if (die
->child
!= NULL
)
7414 struct die_info
*child_die
= die
->child
;
7416 while (child_die
&& child_die
->tag
)
7418 process_die (child_die
, cu
);
7419 child_die
= sibling_die (child_die
);
7424 /* Read a Fortran module as type. This DIE can be only a declaration used for
7425 imported module. Still we need that type as local Fortran "use ... only"
7426 declaration imports depend on the created type in determine_prefix. */
7428 static struct type
*
7429 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7431 struct objfile
*objfile
= cu
->objfile
;
7435 module_name
= dwarf2_name (die
, cu
);
7437 complaint (&symfile_complaints
, _("DW_TAG_module has no name, offset 0x%x"),
7439 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
7441 /* determine_prefix uses TYPE_TAG_NAME. */
7442 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
7444 return set_die_type (die
, type
, cu
);
7447 /* Read a Fortran module. */
7450 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
7452 struct die_info
*child_die
= die
->child
;
7454 while (child_die
&& child_die
->tag
)
7456 process_die (child_die
, cu
);
7457 child_die
= sibling_die (child_die
);
7461 /* Return the name of the namespace represented by DIE. Set
7462 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
7466 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
7468 struct die_info
*current_die
;
7469 const char *name
= NULL
;
7471 /* Loop through the extensions until we find a name. */
7473 for (current_die
= die
;
7474 current_die
!= NULL
;
7475 current_die
= dwarf2_extension (die
, &cu
))
7477 name
= dwarf2_name (current_die
, cu
);
7482 /* Is it an anonymous namespace? */
7484 *is_anonymous
= (name
== NULL
);
7486 name
= "(anonymous namespace)";
7491 /* Extract all information from a DW_TAG_pointer_type DIE and add to
7492 the user defined type vector. */
7494 static struct type
*
7495 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7497 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7498 struct comp_unit_head
*cu_header
= &cu
->header
;
7500 struct attribute
*attr_byte_size
;
7501 struct attribute
*attr_address_class
;
7502 int byte_size
, addr_class
;
7503 struct type
*target_type
;
7505 target_type
= die_type (die
, cu
);
7507 /* The die_type call above may have already set the type for this DIE. */
7508 type
= get_die_type (die
, cu
);
7512 type
= lookup_pointer_type (target_type
);
7514 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7516 byte_size
= DW_UNSND (attr_byte_size
);
7518 byte_size
= cu_header
->addr_size
;
7520 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
7521 if (attr_address_class
)
7522 addr_class
= DW_UNSND (attr_address_class
);
7524 addr_class
= DW_ADDR_none
;
7526 /* If the pointer size or address class is different than the
7527 default, create a type variant marked as such and set the
7528 length accordingly. */
7529 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
7531 if (gdbarch_address_class_type_flags_p (gdbarch
))
7535 type_flags
= gdbarch_address_class_type_flags
7536 (gdbarch
, byte_size
, addr_class
);
7537 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
7539 type
= make_type_with_address_space (type
, type_flags
);
7541 else if (TYPE_LENGTH (type
) != byte_size
)
7543 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
7547 /* Should we also complain about unhandled address classes? */
7551 TYPE_LENGTH (type
) = byte_size
;
7552 return set_die_type (die
, type
, cu
);
7555 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
7556 the user defined type vector. */
7558 static struct type
*
7559 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7562 struct type
*to_type
;
7563 struct type
*domain
;
7565 to_type
= die_type (die
, cu
);
7566 domain
= die_containing_type (die
, cu
);
7568 /* The calls above may have already set the type for this DIE. */
7569 type
= get_die_type (die
, cu
);
7573 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
7574 type
= lookup_methodptr_type (to_type
);
7576 type
= lookup_memberptr_type (to_type
, domain
);
7578 return set_die_type (die
, type
, cu
);
7581 /* Extract all information from a DW_TAG_reference_type DIE and add to
7582 the user defined type vector. */
7584 static struct type
*
7585 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7587 struct comp_unit_head
*cu_header
= &cu
->header
;
7588 struct type
*type
, *target_type
;
7589 struct attribute
*attr
;
7591 target_type
= die_type (die
, cu
);
7593 /* The die_type call above may have already set the type for this DIE. */
7594 type
= get_die_type (die
, cu
);
7598 type
= lookup_reference_type (target_type
);
7599 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7602 TYPE_LENGTH (type
) = DW_UNSND (attr
);
7606 TYPE_LENGTH (type
) = cu_header
->addr_size
;
7608 return set_die_type (die
, type
, cu
);
7611 static struct type
*
7612 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7614 struct type
*base_type
, *cv_type
;
7616 base_type
= die_type (die
, cu
);
7618 /* The die_type call above may have already set the type for this DIE. */
7619 cv_type
= get_die_type (die
, cu
);
7623 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
7624 return set_die_type (die
, cv_type
, cu
);
7627 static struct type
*
7628 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7630 struct type
*base_type
, *cv_type
;
7632 base_type
= die_type (die
, cu
);
7634 /* The die_type call above may have already set the type for this DIE. */
7635 cv_type
= get_die_type (die
, cu
);
7639 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
7640 return set_die_type (die
, cv_type
, cu
);
7643 /* Extract all information from a DW_TAG_string_type DIE and add to
7644 the user defined type vector. It isn't really a user defined type,
7645 but it behaves like one, with other DIE's using an AT_user_def_type
7646 attribute to reference it. */
7648 static struct type
*
7649 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7651 struct objfile
*objfile
= cu
->objfile
;
7652 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7653 struct type
*type
, *range_type
, *index_type
, *char_type
;
7654 struct attribute
*attr
;
7655 unsigned int length
;
7657 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
7660 length
= DW_UNSND (attr
);
7664 /* check for the DW_AT_byte_size attribute */
7665 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7668 length
= DW_UNSND (attr
);
7676 index_type
= objfile_type (objfile
)->builtin_int
;
7677 range_type
= create_range_type (NULL
, index_type
, 1, length
);
7678 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
7679 type
= create_string_type (NULL
, char_type
, range_type
);
7681 return set_die_type (die
, type
, cu
);
7684 /* Handle DIES due to C code like:
7688 int (*funcp)(int a, long l);
7692 ('funcp' generates a DW_TAG_subroutine_type DIE)
7695 static struct type
*
7696 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7698 struct type
*type
; /* Type that this function returns */
7699 struct type
*ftype
; /* Function that returns above type */
7700 struct attribute
*attr
;
7702 type
= die_type (die
, cu
);
7704 /* The die_type call above may have already set the type for this DIE. */
7705 ftype
= get_die_type (die
, cu
);
7709 ftype
= lookup_function_type (type
);
7711 /* All functions in C++, Pascal and Java have prototypes. */
7712 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
7713 if ((attr
&& (DW_UNSND (attr
) != 0))
7714 || cu
->language
== language_cplus
7715 || cu
->language
== language_java
7716 || cu
->language
== language_pascal
)
7717 TYPE_PROTOTYPED (ftype
) = 1;
7718 else if (producer_is_realview (cu
->producer
))
7719 /* RealView does not emit DW_AT_prototyped. We can not
7720 distinguish prototyped and unprototyped functions; default to
7721 prototyped, since that is more common in modern code (and
7722 RealView warns about unprototyped functions). */
7723 TYPE_PROTOTYPED (ftype
) = 1;
7725 /* Store the calling convention in the type if it's available in
7726 the subroutine die. Otherwise set the calling convention to
7727 the default value DW_CC_normal. */
7728 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
7729 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
7731 /* We need to add the subroutine type to the die immediately so
7732 we don't infinitely recurse when dealing with parameters
7733 declared as the same subroutine type. */
7734 set_die_type (die
, ftype
, cu
);
7736 if (die
->child
!= NULL
)
7738 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
7739 struct die_info
*child_die
;
7740 int nparams
, iparams
;
7742 /* Count the number of parameters.
7743 FIXME: GDB currently ignores vararg functions, but knows about
7744 vararg member functions. */
7746 child_die
= die
->child
;
7747 while (child_die
&& child_die
->tag
)
7749 if (child_die
->tag
== DW_TAG_formal_parameter
)
7751 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
7752 TYPE_VARARGS (ftype
) = 1;
7753 child_die
= sibling_die (child_die
);
7756 /* Allocate storage for parameters and fill them in. */
7757 TYPE_NFIELDS (ftype
) = nparams
;
7758 TYPE_FIELDS (ftype
) = (struct field
*)
7759 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
7761 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
7762 even if we error out during the parameters reading below. */
7763 for (iparams
= 0; iparams
< nparams
; iparams
++)
7764 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
7767 child_die
= die
->child
;
7768 while (child_die
&& child_die
->tag
)
7770 if (child_die
->tag
== DW_TAG_formal_parameter
)
7772 struct type
*arg_type
;
7774 /* DWARF version 2 has no clean way to discern C++
7775 static and non-static member functions. G++ helps
7776 GDB by marking the first parameter for non-static
7777 member functions (which is the this pointer) as
7778 artificial. We pass this information to
7779 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
7781 DWARF version 3 added DW_AT_object_pointer, which GCC
7782 4.5 does not yet generate. */
7783 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
7785 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
7788 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
7790 /* GCC/43521: In java, the formal parameter
7791 "this" is sometimes not marked with DW_AT_artificial. */
7792 if (cu
->language
== language_java
)
7794 const char *name
= dwarf2_name (child_die
, cu
);
7796 if (name
&& !strcmp (name
, "this"))
7797 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
7800 arg_type
= die_type (child_die
, cu
);
7802 /* RealView does not mark THIS as const, which the testsuite
7803 expects. GCC marks THIS as const in method definitions,
7804 but not in the class specifications (GCC PR 43053). */
7805 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
7806 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
7809 struct dwarf2_cu
*arg_cu
= cu
;
7810 const char *name
= dwarf2_name (child_die
, cu
);
7812 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
7815 /* If the compiler emits this, use it. */
7816 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
7819 else if (name
&& strcmp (name
, "this") == 0)
7820 /* Function definitions will have the argument names. */
7822 else if (name
== NULL
&& iparams
== 0)
7823 /* Declarations may not have the names, so like
7824 elsewhere in GDB, assume an artificial first
7825 argument is "this". */
7829 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
7833 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
7836 child_die
= sibling_die (child_die
);
7843 static struct type
*
7844 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
7846 struct objfile
*objfile
= cu
->objfile
;
7847 const char *name
= NULL
;
7848 struct type
*this_type
;
7850 name
= dwarf2_full_name (NULL
, die
, cu
);
7851 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
7852 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
7853 TYPE_NAME (this_type
) = (char *) name
;
7854 set_die_type (die
, this_type
, cu
);
7855 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
7859 /* Find a representation of a given base type and install
7860 it in the TYPE field of the die. */
7862 static struct type
*
7863 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7865 struct objfile
*objfile
= cu
->objfile
;
7867 struct attribute
*attr
;
7868 int encoding
= 0, size
= 0;
7870 enum type_code code
= TYPE_CODE_INT
;
7872 struct type
*target_type
= NULL
;
7874 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
7877 encoding
= DW_UNSND (attr
);
7879 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
7882 size
= DW_UNSND (attr
);
7884 name
= dwarf2_name (die
, cu
);
7887 complaint (&symfile_complaints
,
7888 _("DW_AT_name missing from DW_TAG_base_type"));
7893 case DW_ATE_address
:
7894 /* Turn DW_ATE_address into a void * pointer. */
7895 code
= TYPE_CODE_PTR
;
7896 type_flags
|= TYPE_FLAG_UNSIGNED
;
7897 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
7899 case DW_ATE_boolean
:
7900 code
= TYPE_CODE_BOOL
;
7901 type_flags
|= TYPE_FLAG_UNSIGNED
;
7903 case DW_ATE_complex_float
:
7904 code
= TYPE_CODE_COMPLEX
;
7905 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
7907 case DW_ATE_decimal_float
:
7908 code
= TYPE_CODE_DECFLOAT
;
7911 code
= TYPE_CODE_FLT
;
7915 case DW_ATE_unsigned
:
7916 type_flags
|= TYPE_FLAG_UNSIGNED
;
7918 case DW_ATE_signed_char
:
7919 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7920 || cu
->language
== language_pascal
)
7921 code
= TYPE_CODE_CHAR
;
7923 case DW_ATE_unsigned_char
:
7924 if (cu
->language
== language_ada
|| cu
->language
== language_m2
7925 || cu
->language
== language_pascal
)
7926 code
= TYPE_CODE_CHAR
;
7927 type_flags
|= TYPE_FLAG_UNSIGNED
;
7930 /* We just treat this as an integer and then recognize the
7931 type by name elsewhere. */
7935 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
7936 dwarf_type_encoding_name (encoding
));
7940 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
7941 TYPE_NAME (type
) = name
;
7942 TYPE_TARGET_TYPE (type
) = target_type
;
7944 if (name
&& strcmp (name
, "char") == 0)
7945 TYPE_NOSIGN (type
) = 1;
7947 return set_die_type (die
, type
, cu
);
7950 /* Read the given DW_AT_subrange DIE. */
7952 static struct type
*
7953 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7955 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
7956 struct type
*base_type
;
7957 struct type
*range_type
;
7958 struct attribute
*attr
;
7962 LONGEST negative_mask
;
7964 base_type
= die_type (die
, cu
);
7965 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
7966 check_typedef (base_type
);
7968 /* The die_type call above may have already set the type for this DIE. */
7969 range_type
= get_die_type (die
, cu
);
7973 if (cu
->language
== language_fortran
)
7975 /* FORTRAN implies a lower bound of 1, if not given. */
7979 /* FIXME: For variable sized arrays either of these could be
7980 a variable rather than a constant value. We'll allow it,
7981 but we don't know how to handle it. */
7982 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
7984 low
= dwarf2_get_attr_constant_value (attr
, 0);
7986 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
7989 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
7991 /* GCC encodes arrays with unspecified or dynamic length
7992 with a DW_FORM_block1 attribute or a reference attribute.
7993 FIXME: GDB does not yet know how to handle dynamic
7994 arrays properly, treat them as arrays with unspecified
7997 FIXME: jimb/2003-09-22: GDB does not really know
7998 how to handle arrays of unspecified length
7999 either; we just represent them as zero-length
8000 arrays. Choose an appropriate upper bound given
8001 the lower bound we've computed above. */
8005 high
= dwarf2_get_attr_constant_value (attr
, 1);
8009 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
8012 int count
= dwarf2_get_attr_constant_value (attr
, 1);
8013 high
= low
+ count
- 1;
8017 /* Dwarf-2 specifications explicitly allows to create subrange types
8018 without specifying a base type.
8019 In that case, the base type must be set to the type of
8020 the lower bound, upper bound or count, in that order, if any of these
8021 three attributes references an object that has a type.
8022 If no base type is found, the Dwarf-2 specifications say that
8023 a signed integer type of size equal to the size of an address should
8025 For the following C code: `extern char gdb_int [];'
8026 GCC produces an empty range DIE.
8027 FIXME: muller/2010-05-28: Possible references to object for low bound,
8028 high bound or count are not yet handled by this code.
8030 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
8032 struct objfile
*objfile
= cu
->objfile
;
8033 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8034 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
8035 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
8037 /* Test "int", "long int", and "long long int" objfile types,
8038 and select the first one having a size above or equal to the
8039 architecture address size. */
8040 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8041 base_type
= int_type
;
8044 int_type
= objfile_type (objfile
)->builtin_long
;
8045 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8046 base_type
= int_type
;
8049 int_type
= objfile_type (objfile
)->builtin_long_long
;
8050 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
8051 base_type
= int_type
;
8057 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
8058 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
8059 low
|= negative_mask
;
8060 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
8061 high
|= negative_mask
;
8063 range_type
= create_range_type (NULL
, base_type
, low
, high
);
8065 /* Mark arrays with dynamic length at least as an array of unspecified
8066 length. GDB could check the boundary but before it gets implemented at
8067 least allow accessing the array elements. */
8068 if (attr
&& attr
->form
== DW_FORM_block1
)
8069 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
8071 name
= dwarf2_name (die
, cu
);
8073 TYPE_NAME (range_type
) = name
;
8075 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
8077 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
8079 set_die_type (die
, range_type
, cu
);
8081 /* set_die_type should be already done. */
8082 set_descriptive_type (range_type
, die
, cu
);
8087 static struct type
*
8088 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8092 /* For now, we only support the C meaning of an unspecified type: void. */
8094 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
8095 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
8097 return set_die_type (die
, type
, cu
);
8100 /* Trivial hash function for die_info: the hash value of a DIE
8101 is its offset in .debug_info for this objfile. */
8104 die_hash (const void *item
)
8106 const struct die_info
*die
= item
;
8111 /* Trivial comparison function for die_info structures: two DIEs
8112 are equal if they have the same offset. */
8115 die_eq (const void *item_lhs
, const void *item_rhs
)
8117 const struct die_info
*die_lhs
= item_lhs
;
8118 const struct die_info
*die_rhs
= item_rhs
;
8120 return die_lhs
->offset
== die_rhs
->offset
;
8123 /* Read a whole compilation unit into a linked list of dies. */
8125 static struct die_info
*
8126 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
8128 struct die_reader_specs reader_specs
;
8129 int read_abbrevs
= 0;
8130 struct cleanup
*back_to
= NULL
;
8131 struct die_info
*die
;
8133 if (cu
->dwarf2_abbrevs
== NULL
)
8135 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
8136 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
8140 gdb_assert (cu
->die_hash
== NULL
);
8142 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8146 &cu
->comp_unit_obstack
,
8147 hashtab_obstack_allocate
,
8148 dummy_obstack_deallocate
);
8150 init_cu_die_reader (&reader_specs
, cu
);
8152 die
= read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
8155 do_cleanups (back_to
);
8160 /* Main entry point for reading a DIE and all children.
8161 Read the DIE and dump it if requested. */
8163 static struct die_info
*
8164 read_die_and_children (const struct die_reader_specs
*reader
,
8166 gdb_byte
**new_info_ptr
,
8167 struct die_info
*parent
)
8169 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
8170 new_info_ptr
, parent
);
8172 if (dwarf2_die_debug
)
8174 fprintf_unfiltered (gdb_stdlog
,
8175 "\nRead die from %s of %s:\n",
8176 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
8178 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
8180 : "unknown section",
8181 reader
->abfd
->filename
);
8182 dump_die (result
, dwarf2_die_debug
);
8188 /* Read a single die and all its descendents. Set the die's sibling
8189 field to NULL; set other fields in the die correctly, and set all
8190 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
8191 location of the info_ptr after reading all of those dies. PARENT
8192 is the parent of the die in question. */
8194 static struct die_info
*
8195 read_die_and_children_1 (const struct die_reader_specs
*reader
,
8197 gdb_byte
**new_info_ptr
,
8198 struct die_info
*parent
)
8200 struct die_info
*die
;
8204 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
8207 *new_info_ptr
= cur_ptr
;
8210 store_in_ref_table (die
, reader
->cu
);
8213 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
8217 *new_info_ptr
= cur_ptr
;
8220 die
->sibling
= NULL
;
8221 die
->parent
= parent
;
8225 /* Read a die, all of its descendents, and all of its siblings; set
8226 all of the fields of all of the dies correctly. Arguments are as
8227 in read_die_and_children. */
8229 static struct die_info
*
8230 read_die_and_siblings (const struct die_reader_specs
*reader
,
8232 gdb_byte
**new_info_ptr
,
8233 struct die_info
*parent
)
8235 struct die_info
*first_die
, *last_sibling
;
8239 first_die
= last_sibling
= NULL
;
8243 struct die_info
*die
8244 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
8248 *new_info_ptr
= cur_ptr
;
8255 last_sibling
->sibling
= die
;
8261 /* Read the die from the .debug_info section buffer. Set DIEP to
8262 point to a newly allocated die with its information, except for its
8263 child, sibling, and parent fields. Set HAS_CHILDREN to tell
8264 whether the die has children or not. */
8267 read_full_die (const struct die_reader_specs
*reader
,
8268 struct die_info
**diep
, gdb_byte
*info_ptr
,
8271 unsigned int abbrev_number
, bytes_read
, i
, offset
;
8272 struct abbrev_info
*abbrev
;
8273 struct die_info
*die
;
8274 struct dwarf2_cu
*cu
= reader
->cu
;
8275 bfd
*abfd
= reader
->abfd
;
8277 offset
= info_ptr
- reader
->buffer
;
8278 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8279 info_ptr
+= bytes_read
;
8287 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
8289 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
8291 bfd_get_filename (abfd
));
8293 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
8294 die
->offset
= offset
;
8295 die
->tag
= abbrev
->tag
;
8296 die
->abbrev
= abbrev_number
;
8298 die
->num_attrs
= abbrev
->num_attrs
;
8300 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8301 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
8302 abfd
, info_ptr
, cu
);
8305 *has_children
= abbrev
->has_children
;
8309 /* In DWARF version 2, the description of the debugging information is
8310 stored in a separate .debug_abbrev section. Before we read any
8311 dies from a section we read in all abbreviations and install them
8312 in a hash table. This function also sets flags in CU describing
8313 the data found in the abbrev table. */
8316 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
8318 struct comp_unit_head
*cu_header
= &cu
->header
;
8319 gdb_byte
*abbrev_ptr
;
8320 struct abbrev_info
*cur_abbrev
;
8321 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
8322 unsigned int abbrev_form
, hash_number
;
8323 struct attr_abbrev
*cur_attrs
;
8324 unsigned int allocated_attrs
;
8326 /* Initialize dwarf2 abbrevs */
8327 obstack_init (&cu
->abbrev_obstack
);
8328 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
8330 * sizeof (struct abbrev_info
*)));
8331 memset (cu
->dwarf2_abbrevs
, 0,
8332 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
8334 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
8335 &dwarf2_per_objfile
->abbrev
);
8336 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
8337 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8338 abbrev_ptr
+= bytes_read
;
8340 allocated_attrs
= ATTR_ALLOC_CHUNK
;
8341 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
8343 /* loop until we reach an abbrev number of 0 */
8344 while (abbrev_number
)
8346 cur_abbrev
= dwarf_alloc_abbrev (cu
);
8348 /* read in abbrev header */
8349 cur_abbrev
->number
= abbrev_number
;
8350 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8351 abbrev_ptr
+= bytes_read
;
8352 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
8355 if (cur_abbrev
->tag
== DW_TAG_namespace
)
8356 cu
->has_namespace_info
= 1;
8358 /* now read in declarations */
8359 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8360 abbrev_ptr
+= bytes_read
;
8361 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8362 abbrev_ptr
+= bytes_read
;
8365 if (cur_abbrev
->num_attrs
== allocated_attrs
)
8367 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
8369 = xrealloc (cur_attrs
, (allocated_attrs
8370 * sizeof (struct attr_abbrev
)));
8373 /* Record whether this compilation unit might have
8374 inter-compilation-unit references. If we don't know what form
8375 this attribute will have, then it might potentially be a
8376 DW_FORM_ref_addr, so we conservatively expect inter-CU
8379 if (abbrev_form
== DW_FORM_ref_addr
8380 || abbrev_form
== DW_FORM_indirect
)
8381 cu
->has_form_ref_addr
= 1;
8383 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
8384 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
8385 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8386 abbrev_ptr
+= bytes_read
;
8387 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8388 abbrev_ptr
+= bytes_read
;
8391 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
8392 (cur_abbrev
->num_attrs
8393 * sizeof (struct attr_abbrev
)));
8394 memcpy (cur_abbrev
->attrs
, cur_attrs
,
8395 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
8397 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
8398 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
8399 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
8401 /* Get next abbreviation.
8402 Under Irix6 the abbreviations for a compilation unit are not
8403 always properly terminated with an abbrev number of 0.
8404 Exit loop if we encounter an abbreviation which we have
8405 already read (which means we are about to read the abbreviations
8406 for the next compile unit) or if the end of the abbreviation
8407 table is reached. */
8408 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
8409 >= dwarf2_per_objfile
->abbrev
.size
)
8411 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
8412 abbrev_ptr
+= bytes_read
;
8413 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
8420 /* Release the memory used by the abbrev table for a compilation unit. */
8423 dwarf2_free_abbrev_table (void *ptr_to_cu
)
8425 struct dwarf2_cu
*cu
= ptr_to_cu
;
8427 obstack_free (&cu
->abbrev_obstack
, NULL
);
8428 cu
->dwarf2_abbrevs
= NULL
;
8431 /* Lookup an abbrev_info structure in the abbrev hash table. */
8433 static struct abbrev_info
*
8434 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
8436 unsigned int hash_number
;
8437 struct abbrev_info
*abbrev
;
8439 hash_number
= number
% ABBREV_HASH_SIZE
;
8440 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
8444 if (abbrev
->number
== number
)
8447 abbrev
= abbrev
->next
;
8452 /* Returns nonzero if TAG represents a type that we might generate a partial
8456 is_type_tag_for_partial (int tag
)
8461 /* Some types that would be reasonable to generate partial symbols for,
8462 that we don't at present. */
8463 case DW_TAG_array_type
:
8464 case DW_TAG_file_type
:
8465 case DW_TAG_ptr_to_member_type
:
8466 case DW_TAG_set_type
:
8467 case DW_TAG_string_type
:
8468 case DW_TAG_subroutine_type
:
8470 case DW_TAG_base_type
:
8471 case DW_TAG_class_type
:
8472 case DW_TAG_interface_type
:
8473 case DW_TAG_enumeration_type
:
8474 case DW_TAG_structure_type
:
8475 case DW_TAG_subrange_type
:
8476 case DW_TAG_typedef
:
8477 case DW_TAG_union_type
:
8484 /* Load all DIEs that are interesting for partial symbols into memory. */
8486 static struct partial_die_info
*
8487 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8488 int building_psymtab
, struct dwarf2_cu
*cu
)
8490 struct partial_die_info
*part_die
;
8491 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
8492 struct abbrev_info
*abbrev
;
8493 unsigned int bytes_read
;
8494 unsigned int load_all
= 0;
8496 int nesting_level
= 1;
8501 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
8505 = htab_create_alloc_ex (cu
->header
.length
/ 12,
8509 &cu
->comp_unit_obstack
,
8510 hashtab_obstack_allocate
,
8511 dummy_obstack_deallocate
);
8513 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8514 sizeof (struct partial_die_info
));
8518 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
8520 /* A NULL abbrev means the end of a series of children. */
8523 if (--nesting_level
== 0)
8525 /* PART_DIE was probably the last thing allocated on the
8526 comp_unit_obstack, so we could call obstack_free
8527 here. We don't do that because the waste is small,
8528 and will be cleaned up when we're done with this
8529 compilation unit. This way, we're also more robust
8530 against other users of the comp_unit_obstack. */
8533 info_ptr
+= bytes_read
;
8534 last_die
= parent_die
;
8535 parent_die
= parent_die
->die_parent
;
8539 /* Check for template arguments. We never save these; if
8540 they're seen, we just mark the parent, and go on our way. */
8541 if (parent_die
!= NULL
8542 && cu
->language
== language_cplus
8543 && (abbrev
->tag
== DW_TAG_template_type_param
8544 || abbrev
->tag
== DW_TAG_template_value_param
))
8546 parent_die
->has_template_arguments
= 1;
8550 /* We don't need a partial DIE for the template argument. */
8551 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
,
8557 /* We only recurse into subprograms looking for template arguments.
8558 Skip their other children. */
8560 && cu
->language
== language_cplus
8561 && parent_die
!= NULL
8562 && parent_die
->tag
== DW_TAG_subprogram
)
8564 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8568 /* Check whether this DIE is interesting enough to save. Normally
8569 we would not be interested in members here, but there may be
8570 later variables referencing them via DW_AT_specification (for
8573 && !is_type_tag_for_partial (abbrev
->tag
)
8574 && abbrev
->tag
!= DW_TAG_constant
8575 && abbrev
->tag
!= DW_TAG_enumerator
8576 && abbrev
->tag
!= DW_TAG_subprogram
8577 && abbrev
->tag
!= DW_TAG_lexical_block
8578 && abbrev
->tag
!= DW_TAG_variable
8579 && abbrev
->tag
!= DW_TAG_namespace
8580 && abbrev
->tag
!= DW_TAG_module
8581 && abbrev
->tag
!= DW_TAG_member
)
8583 /* Otherwise we skip to the next sibling, if any. */
8584 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
8588 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
8589 buffer
, info_ptr
, cu
);
8591 /* This two-pass algorithm for processing partial symbols has a
8592 high cost in cache pressure. Thus, handle some simple cases
8593 here which cover the majority of C partial symbols. DIEs
8594 which neither have specification tags in them, nor could have
8595 specification tags elsewhere pointing at them, can simply be
8596 processed and discarded.
8598 This segment is also optional; scan_partial_symbols and
8599 add_partial_symbol will handle these DIEs if we chain
8600 them in normally. When compilers which do not emit large
8601 quantities of duplicate debug information are more common,
8602 this code can probably be removed. */
8604 /* Any complete simple types at the top level (pretty much all
8605 of them, for a language without namespaces), can be processed
8607 if (parent_die
== NULL
8608 && part_die
->has_specification
== 0
8609 && part_die
->is_declaration
== 0
8610 && (part_die
->tag
== DW_TAG_typedef
8611 || part_die
->tag
== DW_TAG_base_type
8612 || part_die
->tag
== DW_TAG_subrange_type
))
8614 if (building_psymtab
&& part_die
->name
!= NULL
)
8615 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8616 VAR_DOMAIN
, LOC_TYPEDEF
,
8617 &cu
->objfile
->static_psymbols
,
8618 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8619 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8623 /* If we're at the second level, and we're an enumerator, and
8624 our parent has no specification (meaning possibly lives in a
8625 namespace elsewhere), then we can add the partial symbol now
8626 instead of queueing it. */
8627 if (part_die
->tag
== DW_TAG_enumerator
8628 && parent_die
!= NULL
8629 && parent_die
->die_parent
== NULL
8630 && parent_die
->tag
== DW_TAG_enumeration_type
8631 && parent_die
->has_specification
== 0)
8633 if (part_die
->name
== NULL
)
8634 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
8635 else if (building_psymtab
)
8636 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
8637 VAR_DOMAIN
, LOC_CONST
,
8638 (cu
->language
== language_cplus
8639 || cu
->language
== language_java
)
8640 ? &cu
->objfile
->global_psymbols
8641 : &cu
->objfile
->static_psymbols
,
8642 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
8644 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
8648 /* We'll save this DIE so link it in. */
8649 part_die
->die_parent
= parent_die
;
8650 part_die
->die_sibling
= NULL
;
8651 part_die
->die_child
= NULL
;
8653 if (last_die
&& last_die
== parent_die
)
8654 last_die
->die_child
= part_die
;
8656 last_die
->die_sibling
= part_die
;
8658 last_die
= part_die
;
8660 if (first_die
== NULL
)
8661 first_die
= part_die
;
8663 /* Maybe add the DIE to the hash table. Not all DIEs that we
8664 find interesting need to be in the hash table, because we
8665 also have the parent/sibling/child chains; only those that we
8666 might refer to by offset later during partial symbol reading.
8668 For now this means things that might have be the target of a
8669 DW_AT_specification, DW_AT_abstract_origin, or
8670 DW_AT_extension. DW_AT_extension will refer only to
8671 namespaces; DW_AT_abstract_origin refers to functions (and
8672 many things under the function DIE, but we do not recurse
8673 into function DIEs during partial symbol reading) and
8674 possibly variables as well; DW_AT_specification refers to
8675 declarations. Declarations ought to have the DW_AT_declaration
8676 flag. It happens that GCC forgets to put it in sometimes, but
8677 only for functions, not for types.
8679 Adding more things than necessary to the hash table is harmless
8680 except for the performance cost. Adding too few will result in
8681 wasted time in find_partial_die, when we reread the compilation
8682 unit with load_all_dies set. */
8685 || abbrev
->tag
== DW_TAG_constant
8686 || abbrev
->tag
== DW_TAG_subprogram
8687 || abbrev
->tag
== DW_TAG_variable
8688 || abbrev
->tag
== DW_TAG_namespace
8689 || part_die
->is_declaration
)
8693 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
8694 part_die
->offset
, INSERT
);
8698 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
8699 sizeof (struct partial_die_info
));
8701 /* For some DIEs we want to follow their children (if any). For C
8702 we have no reason to follow the children of structures; for other
8703 languages we have to, so that we can get at method physnames
8704 to infer fully qualified class names, for DW_AT_specification,
8705 and for C++ template arguments. For C++, we also look one level
8706 inside functions to find template arguments (if the name of the
8707 function does not already contain the template arguments).
8709 For Ada, we need to scan the children of subprograms and lexical
8710 blocks as well because Ada allows the definition of nested
8711 entities that could be interesting for the debugger, such as
8712 nested subprograms for instance. */
8713 if (last_die
->has_children
8715 || last_die
->tag
== DW_TAG_namespace
8716 || last_die
->tag
== DW_TAG_module
8717 || last_die
->tag
== DW_TAG_enumeration_type
8718 || (cu
->language
== language_cplus
8719 && last_die
->tag
== DW_TAG_subprogram
8720 && (last_die
->name
== NULL
8721 || strchr (last_die
->name
, '<') == NULL
))
8722 || (cu
->language
!= language_c
8723 && (last_die
->tag
== DW_TAG_class_type
8724 || last_die
->tag
== DW_TAG_interface_type
8725 || last_die
->tag
== DW_TAG_structure_type
8726 || last_die
->tag
== DW_TAG_union_type
))
8727 || (cu
->language
== language_ada
8728 && (last_die
->tag
== DW_TAG_subprogram
8729 || last_die
->tag
== DW_TAG_lexical_block
))))
8732 parent_die
= last_die
;
8736 /* Otherwise we skip to the next sibling, if any. */
8737 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
8739 /* Back to the top, do it again. */
8743 /* Read a minimal amount of information into the minimal die structure. */
8746 read_partial_die (struct partial_die_info
*part_die
,
8747 struct abbrev_info
*abbrev
,
8748 unsigned int abbrev_len
, bfd
*abfd
,
8749 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
8750 struct dwarf2_cu
*cu
)
8753 struct attribute attr
;
8754 int has_low_pc_attr
= 0;
8755 int has_high_pc_attr
= 0;
8757 memset (part_die
, 0, sizeof (struct partial_die_info
));
8759 part_die
->offset
= info_ptr
- buffer
;
8761 info_ptr
+= abbrev_len
;
8766 part_die
->tag
= abbrev
->tag
;
8767 part_die
->has_children
= abbrev
->has_children
;
8769 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
8771 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
8773 /* Store the data if it is of an attribute we want to keep in a
8774 partial symbol table. */
8778 switch (part_die
->tag
)
8780 case DW_TAG_compile_unit
:
8781 case DW_TAG_type_unit
:
8782 /* Compilation units have a DW_AT_name that is a filename, not
8783 a source language identifier. */
8784 case DW_TAG_enumeration_type
:
8785 case DW_TAG_enumerator
:
8786 /* These tags always have simple identifiers already; no need
8787 to canonicalize them. */
8788 part_die
->name
= DW_STRING (&attr
);
8792 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
8793 &cu
->objfile
->objfile_obstack
);
8797 case DW_AT_linkage_name
:
8798 case DW_AT_MIPS_linkage_name
:
8799 /* Note that both forms of linkage name might appear. We
8800 assume they will be the same, and we only store the last
8802 if (cu
->language
== language_ada
)
8803 part_die
->name
= DW_STRING (&attr
);
8806 has_low_pc_attr
= 1;
8807 part_die
->lowpc
= DW_ADDR (&attr
);
8810 has_high_pc_attr
= 1;
8811 part_die
->highpc
= DW_ADDR (&attr
);
8813 case DW_AT_location
:
8814 /* Support the .debug_loc offsets */
8815 if (attr_form_is_block (&attr
))
8817 part_die
->locdesc
= DW_BLOCK (&attr
);
8819 else if (attr_form_is_section_offset (&attr
))
8821 dwarf2_complex_location_expr_complaint ();
8825 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
8826 "partial symbol information");
8829 case DW_AT_external
:
8830 part_die
->is_external
= DW_UNSND (&attr
);
8832 case DW_AT_declaration
:
8833 part_die
->is_declaration
= DW_UNSND (&attr
);
8836 part_die
->has_type
= 1;
8838 case DW_AT_abstract_origin
:
8839 case DW_AT_specification
:
8840 case DW_AT_extension
:
8841 part_die
->has_specification
= 1;
8842 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
8845 /* Ignore absolute siblings, they might point outside of
8846 the current compile unit. */
8847 if (attr
.form
== DW_FORM_ref_addr
)
8848 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
8850 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
8852 case DW_AT_byte_size
:
8853 part_die
->has_byte_size
= 1;
8855 case DW_AT_calling_convention
:
8856 /* DWARF doesn't provide a way to identify a program's source-level
8857 entry point. DW_AT_calling_convention attributes are only meant
8858 to describe functions' calling conventions.
8860 However, because it's a necessary piece of information in
8861 Fortran, and because DW_CC_program is the only piece of debugging
8862 information whose definition refers to a 'main program' at all,
8863 several compilers have begun marking Fortran main programs with
8864 DW_CC_program --- even when those functions use the standard
8865 calling conventions.
8867 So until DWARF specifies a way to provide this information and
8868 compilers pick up the new representation, we'll support this
8870 if (DW_UNSND (&attr
) == DW_CC_program
8871 && cu
->language
== language_fortran
)
8872 set_main_name (part_die
->name
);
8879 /* When using the GNU linker, .gnu.linkonce. sections are used to
8880 eliminate duplicate copies of functions and vtables and such.
8881 The linker will arbitrarily choose one and discard the others.
8882 The AT_*_pc values for such functions refer to local labels in
8883 these sections. If the section from that file was discarded, the
8884 labels are not in the output, so the relocs get a value of 0.
8885 If this is a discarded function, mark the pc bounds as invalid,
8886 so that GDB will ignore it. */
8887 if (has_low_pc_attr
&& has_high_pc_attr
8888 && part_die
->lowpc
< part_die
->highpc
8889 && (part_die
->lowpc
!= 0
8890 || dwarf2_per_objfile
->has_section_at_zero
))
8891 part_die
->has_pc_info
= 1;
8896 /* Find a cached partial DIE at OFFSET in CU. */
8898 static struct partial_die_info
*
8899 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
8901 struct partial_die_info
*lookup_die
= NULL
;
8902 struct partial_die_info part_die
;
8904 part_die
.offset
= offset
;
8905 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
8910 /* Find a partial DIE at OFFSET, which may or may not be in CU,
8911 except in the case of .debug_types DIEs which do not reference
8912 outside their CU (they do however referencing other types via
8915 static struct partial_die_info
*
8916 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
8918 struct dwarf2_per_cu_data
*per_cu
= NULL
;
8919 struct partial_die_info
*pd
= NULL
;
8921 if (cu
->per_cu
->from_debug_types
)
8923 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8929 if (offset_in_cu_p (&cu
->header
, offset
))
8931 pd
= find_partial_die_in_comp_unit (offset
, cu
);
8936 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
8938 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
8939 load_partial_comp_unit (per_cu
, cu
->objfile
);
8941 per_cu
->cu
->last_used
= 0;
8942 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8944 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
8946 struct cleanup
*back_to
;
8947 struct partial_die_info comp_unit_die
;
8948 struct abbrev_info
*abbrev
;
8949 unsigned int bytes_read
;
8952 per_cu
->load_all_dies
= 1;
8954 /* Re-read the DIEs. */
8955 back_to
= make_cleanup (null_cleanup
, 0);
8956 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
8958 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
8959 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
8961 info_ptr
= (dwarf2_per_objfile
->info
.buffer
8962 + per_cu
->cu
->header
.offset
8963 + per_cu
->cu
->header
.first_die_offset
);
8964 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
8965 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
8966 per_cu
->cu
->objfile
->obfd
,
8967 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8969 if (comp_unit_die
.has_children
)
8970 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
8971 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
8973 do_cleanups (back_to
);
8975 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
8981 internal_error (__FILE__
, __LINE__
,
8982 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
8983 offset
, bfd_get_filename (cu
->objfile
->obfd
));
8987 /* Adjust PART_DIE before generating a symbol for it. This function
8988 may set the is_external flag or change the DIE's name. */
8991 fixup_partial_die (struct partial_die_info
*part_die
,
8992 struct dwarf2_cu
*cu
)
8994 /* If we found a reference attribute and the DIE has no name, try
8995 to find a name in the referred to DIE. */
8997 if (part_die
->name
== NULL
&& part_die
->has_specification
)
8999 struct partial_die_info
*spec_die
;
9001 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
9003 fixup_partial_die (spec_die
, cu
);
9007 part_die
->name
= spec_die
->name
;
9009 /* Copy DW_AT_external attribute if it is set. */
9010 if (spec_die
->is_external
)
9011 part_die
->is_external
= spec_die
->is_external
;
9015 /* Set default names for some unnamed DIEs. */
9017 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
9018 part_die
->name
= "(anonymous namespace)";
9020 if (part_die
->tag
== DW_TAG_structure_type
9021 || part_die
->tag
== DW_TAG_class_type
9022 || part_die
->tag
== DW_TAG_union_type
)
9023 guess_structure_name (part_die
, cu
);
9026 /* Read an attribute value described by an attribute form. */
9029 read_attribute_value (struct attribute
*attr
, unsigned form
,
9030 bfd
*abfd
, gdb_byte
*info_ptr
,
9031 struct dwarf2_cu
*cu
)
9033 struct comp_unit_head
*cu_header
= &cu
->header
;
9034 unsigned int bytes_read
;
9035 struct dwarf_block
*blk
;
9040 case DW_FORM_ref_addr
:
9041 if (cu
->header
.version
== 2)
9042 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9044 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9045 info_ptr
+= bytes_read
;
9048 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
9049 info_ptr
+= bytes_read
;
9051 case DW_FORM_block2
:
9052 blk
= dwarf_alloc_block (cu
);
9053 blk
->size
= read_2_bytes (abfd
, info_ptr
);
9055 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9056 info_ptr
+= blk
->size
;
9057 DW_BLOCK (attr
) = blk
;
9059 case DW_FORM_block4
:
9060 blk
= dwarf_alloc_block (cu
);
9061 blk
->size
= read_4_bytes (abfd
, info_ptr
);
9063 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9064 info_ptr
+= blk
->size
;
9065 DW_BLOCK (attr
) = blk
;
9068 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
9072 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
9076 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
9079 case DW_FORM_sec_offset
:
9080 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
9081 info_ptr
+= bytes_read
;
9083 case DW_FORM_string
:
9084 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
9085 DW_STRING_IS_CANONICAL (attr
) = 0;
9086 info_ptr
+= bytes_read
;
9089 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
9091 DW_STRING_IS_CANONICAL (attr
) = 0;
9092 info_ptr
+= bytes_read
;
9094 case DW_FORM_exprloc
:
9096 blk
= dwarf_alloc_block (cu
);
9097 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9098 info_ptr
+= bytes_read
;
9099 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9100 info_ptr
+= blk
->size
;
9101 DW_BLOCK (attr
) = blk
;
9103 case DW_FORM_block1
:
9104 blk
= dwarf_alloc_block (cu
);
9105 blk
->size
= read_1_byte (abfd
, info_ptr
);
9107 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
9108 info_ptr
+= blk
->size
;
9109 DW_BLOCK (attr
) = blk
;
9112 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9116 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
9119 case DW_FORM_flag_present
:
9120 DW_UNSND (attr
) = 1;
9123 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
9124 info_ptr
+= bytes_read
;
9127 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9128 info_ptr
+= bytes_read
;
9131 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
9135 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
9139 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
9143 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
9147 /* Convert the signature to something we can record in DW_UNSND
9149 NOTE: This is NULL if the type wasn't found. */
9150 DW_SIGNATURED_TYPE (attr
) =
9151 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
9154 case DW_FORM_ref_udata
:
9155 DW_ADDR (attr
) = (cu
->header
.offset
9156 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
9157 info_ptr
+= bytes_read
;
9159 case DW_FORM_indirect
:
9160 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9161 info_ptr
+= bytes_read
;
9162 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
9165 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
9166 dwarf_form_name (form
),
9167 bfd_get_filename (abfd
));
9170 /* We have seen instances where the compiler tried to emit a byte
9171 size attribute of -1 which ended up being encoded as an unsigned
9172 0xffffffff. Although 0xffffffff is technically a valid size value,
9173 an object of this size seems pretty unlikely so we can relatively
9174 safely treat these cases as if the size attribute was invalid and
9175 treat them as zero by default. */
9176 if (attr
->name
== DW_AT_byte_size
9177 && form
== DW_FORM_data4
9178 && DW_UNSND (attr
) >= 0xffffffff)
9181 (&symfile_complaints
,
9182 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
9183 hex_string (DW_UNSND (attr
)));
9184 DW_UNSND (attr
) = 0;
9190 /* Read an attribute described by an abbreviated attribute. */
9193 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
9194 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
9196 attr
->name
= abbrev
->name
;
9197 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
9200 /* read dwarf information from a buffer */
9203 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
9205 return bfd_get_8 (abfd
, buf
);
9209 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
9211 return bfd_get_signed_8 (abfd
, buf
);
9215 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
9217 return bfd_get_16 (abfd
, buf
);
9221 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9223 return bfd_get_signed_16 (abfd
, buf
);
9227 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
9229 return bfd_get_32 (abfd
, buf
);
9233 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
9235 return bfd_get_signed_32 (abfd
, buf
);
9239 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
9241 return bfd_get_64 (abfd
, buf
);
9245 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
9246 unsigned int *bytes_read
)
9248 struct comp_unit_head
*cu_header
= &cu
->header
;
9249 CORE_ADDR retval
= 0;
9251 if (cu_header
->signed_addr_p
)
9253 switch (cu_header
->addr_size
)
9256 retval
= bfd_get_signed_16 (abfd
, buf
);
9259 retval
= bfd_get_signed_32 (abfd
, buf
);
9262 retval
= bfd_get_signed_64 (abfd
, buf
);
9265 internal_error (__FILE__
, __LINE__
,
9266 _("read_address: bad switch, signed [in module %s]"),
9267 bfd_get_filename (abfd
));
9272 switch (cu_header
->addr_size
)
9275 retval
= bfd_get_16 (abfd
, buf
);
9278 retval
= bfd_get_32 (abfd
, buf
);
9281 retval
= bfd_get_64 (abfd
, buf
);
9284 internal_error (__FILE__
, __LINE__
,
9285 _("read_address: bad switch, unsigned [in module %s]"),
9286 bfd_get_filename (abfd
));
9290 *bytes_read
= cu_header
->addr_size
;
9294 /* Read the initial length from a section. The (draft) DWARF 3
9295 specification allows the initial length to take up either 4 bytes
9296 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
9297 bytes describe the length and all offsets will be 8 bytes in length
9300 An older, non-standard 64-bit format is also handled by this
9301 function. The older format in question stores the initial length
9302 as an 8-byte quantity without an escape value. Lengths greater
9303 than 2^32 aren't very common which means that the initial 4 bytes
9304 is almost always zero. Since a length value of zero doesn't make
9305 sense for the 32-bit format, this initial zero can be considered to
9306 be an escape value which indicates the presence of the older 64-bit
9307 format. As written, the code can't detect (old format) lengths
9308 greater than 4GB. If it becomes necessary to handle lengths
9309 somewhat larger than 4GB, we could allow other small values (such
9310 as the non-sensical values of 1, 2, and 3) to also be used as
9311 escape values indicating the presence of the old format.
9313 The value returned via bytes_read should be used to increment the
9314 relevant pointer after calling read_initial_length().
9316 [ Note: read_initial_length() and read_offset() are based on the
9317 document entitled "DWARF Debugging Information Format", revision
9318 3, draft 8, dated November 19, 2001. This document was obtained
9321 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
9323 This document is only a draft and is subject to change. (So beware.)
9325 Details regarding the older, non-standard 64-bit format were
9326 determined empirically by examining 64-bit ELF files produced by
9327 the SGI toolchain on an IRIX 6.5 machine.
9329 - Kevin, July 16, 2002
9333 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
9335 LONGEST length
= bfd_get_32 (abfd
, buf
);
9337 if (length
== 0xffffffff)
9339 length
= bfd_get_64 (abfd
, buf
+ 4);
9342 else if (length
== 0)
9344 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
9345 length
= bfd_get_64 (abfd
, buf
);
9356 /* Cover function for read_initial_length.
9357 Returns the length of the object at BUF, and stores the size of the
9358 initial length in *BYTES_READ and stores the size that offsets will be in
9360 If the initial length size is not equivalent to that specified in
9361 CU_HEADER then issue a complaint.
9362 This is useful when reading non-comp-unit headers. */
9365 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
9366 const struct comp_unit_head
*cu_header
,
9367 unsigned int *bytes_read
,
9368 unsigned int *offset_size
)
9370 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
9372 gdb_assert (cu_header
->initial_length_size
== 4
9373 || cu_header
->initial_length_size
== 8
9374 || cu_header
->initial_length_size
== 12);
9376 if (cu_header
->initial_length_size
!= *bytes_read
)
9377 complaint (&symfile_complaints
,
9378 _("intermixed 32-bit and 64-bit DWARF sections"));
9380 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
9384 /* Read an offset from the data stream. The size of the offset is
9385 given by cu_header->offset_size. */
9388 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
9389 unsigned int *bytes_read
)
9391 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
9393 *bytes_read
= cu_header
->offset_size
;
9397 /* Read an offset from the data stream. */
9400 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
9404 switch (offset_size
)
9407 retval
= bfd_get_32 (abfd
, buf
);
9410 retval
= bfd_get_64 (abfd
, buf
);
9413 internal_error (__FILE__
, __LINE__
,
9414 _("read_offset_1: bad switch [in module %s]"),
9415 bfd_get_filename (abfd
));
9422 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
9424 /* If the size of a host char is 8 bits, we can return a pointer
9425 to the buffer, otherwise we have to copy the data to a buffer
9426 allocated on the temporary obstack. */
9427 gdb_assert (HOST_CHAR_BIT
== 8);
9432 read_direct_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9434 /* If the size of a host char is 8 bits, we can return a pointer
9435 to the string, otherwise we have to copy the string to a buffer
9436 allocated on the temporary obstack. */
9437 gdb_assert (HOST_CHAR_BIT
== 8);
9440 *bytes_read_ptr
= 1;
9443 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
9444 return (char *) buf
;
9448 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
9449 const struct comp_unit_head
*cu_header
,
9450 unsigned int *bytes_read_ptr
)
9452 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
9454 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
9455 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
9457 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
9458 bfd_get_filename (abfd
));
9461 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
9463 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
9464 bfd_get_filename (abfd
));
9467 gdb_assert (HOST_CHAR_BIT
== 8);
9468 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
9470 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
9473 static unsigned long
9474 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9476 unsigned long result
;
9477 unsigned int num_read
;
9487 byte
= bfd_get_8 (abfd
, buf
);
9490 result
|= ((unsigned long)(byte
& 127) << shift
);
9491 if ((byte
& 128) == 0)
9497 *bytes_read_ptr
= num_read
;
9502 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
9505 int i
, shift
, num_read
;
9514 byte
= bfd_get_8 (abfd
, buf
);
9517 result
|= ((long)(byte
& 127) << shift
);
9519 if ((byte
& 128) == 0)
9524 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
9525 result
|= -(((long)1) << shift
);
9526 *bytes_read_ptr
= num_read
;
9530 /* Return a pointer to just past the end of an LEB128 number in BUF. */
9533 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
9539 byte
= bfd_get_8 (abfd
, buf
);
9541 if ((byte
& 128) == 0)
9547 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
9554 cu
->language
= language_c
;
9556 case DW_LANG_C_plus_plus
:
9557 cu
->language
= language_cplus
;
9560 cu
->language
= language_d
;
9562 case DW_LANG_Fortran77
:
9563 case DW_LANG_Fortran90
:
9564 case DW_LANG_Fortran95
:
9565 cu
->language
= language_fortran
;
9567 case DW_LANG_Mips_Assembler
:
9568 cu
->language
= language_asm
;
9571 cu
->language
= language_java
;
9575 cu
->language
= language_ada
;
9577 case DW_LANG_Modula2
:
9578 cu
->language
= language_m2
;
9580 case DW_LANG_Pascal83
:
9581 cu
->language
= language_pascal
;
9584 cu
->language
= language_objc
;
9586 case DW_LANG_Cobol74
:
9587 case DW_LANG_Cobol85
:
9589 cu
->language
= language_minimal
;
9592 cu
->language_defn
= language_def (cu
->language
);
9595 /* Return the named attribute or NULL if not there. */
9597 static struct attribute
*
9598 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
9601 struct attribute
*spec
= NULL
;
9603 for (i
= 0; i
< die
->num_attrs
; ++i
)
9605 if (die
->attrs
[i
].name
== name
)
9606 return &die
->attrs
[i
];
9607 if (die
->attrs
[i
].name
== DW_AT_specification
9608 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
9609 spec
= &die
->attrs
[i
];
9614 die
= follow_die_ref (die
, spec
, &cu
);
9615 return dwarf2_attr (die
, name
, cu
);
9621 /* Return the named attribute or NULL if not there,
9622 but do not follow DW_AT_specification, etc.
9623 This is for use in contexts where we're reading .debug_types dies.
9624 Following DW_AT_specification, DW_AT_abstract_origin will take us
9625 back up the chain, and we want to go down. */
9627 static struct attribute
*
9628 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
9629 struct dwarf2_cu
*cu
)
9633 for (i
= 0; i
< die
->num_attrs
; ++i
)
9634 if (die
->attrs
[i
].name
== name
)
9635 return &die
->attrs
[i
];
9640 /* Return non-zero iff the attribute NAME is defined for the given DIE,
9641 and holds a non-zero value. This function should only be used for
9642 DW_FORM_flag or DW_FORM_flag_present attributes. */
9645 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
9647 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
9649 return (attr
&& DW_UNSND (attr
));
9653 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
9655 /* A DIE is a declaration if it has a DW_AT_declaration attribute
9656 which value is non-zero. However, we have to be careful with
9657 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
9658 (via dwarf2_flag_true_p) follows this attribute. So we may
9659 end up accidently finding a declaration attribute that belongs
9660 to a different DIE referenced by the specification attribute,
9661 even though the given DIE does not have a declaration attribute. */
9662 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
9663 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
9666 /* Return the die giving the specification for DIE, if there is
9667 one. *SPEC_CU is the CU containing DIE on input, and the CU
9668 containing the return value on output. If there is no
9669 specification, but there is an abstract origin, that is
9672 static struct die_info
*
9673 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
9675 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
9678 if (spec_attr
== NULL
)
9679 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
9681 if (spec_attr
== NULL
)
9684 return follow_die_ref (die
, spec_attr
, spec_cu
);
9687 /* Free the line_header structure *LH, and any arrays and strings it
9690 free_line_header (struct line_header
*lh
)
9692 if (lh
->standard_opcode_lengths
)
9693 xfree (lh
->standard_opcode_lengths
);
9695 /* Remember that all the lh->file_names[i].name pointers are
9696 pointers into debug_line_buffer, and don't need to be freed. */
9698 xfree (lh
->file_names
);
9700 /* Similarly for the include directory names. */
9701 if (lh
->include_dirs
)
9702 xfree (lh
->include_dirs
);
9708 /* Add an entry to LH's include directory table. */
9710 add_include_dir (struct line_header
*lh
, char *include_dir
)
9712 /* Grow the array if necessary. */
9713 if (lh
->include_dirs_size
== 0)
9715 lh
->include_dirs_size
= 1; /* for testing */
9716 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
9717 * sizeof (*lh
->include_dirs
));
9719 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
9721 lh
->include_dirs_size
*= 2;
9722 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
9723 (lh
->include_dirs_size
9724 * sizeof (*lh
->include_dirs
)));
9727 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
9731 /* Add an entry to LH's file name table. */
9733 add_file_name (struct line_header
*lh
,
9735 unsigned int dir_index
,
9736 unsigned int mod_time
,
9737 unsigned int length
)
9739 struct file_entry
*fe
;
9741 /* Grow the array if necessary. */
9742 if (lh
->file_names_size
== 0)
9744 lh
->file_names_size
= 1; /* for testing */
9745 lh
->file_names
= xmalloc (lh
->file_names_size
9746 * sizeof (*lh
->file_names
));
9748 else if (lh
->num_file_names
>= lh
->file_names_size
)
9750 lh
->file_names_size
*= 2;
9751 lh
->file_names
= xrealloc (lh
->file_names
,
9752 (lh
->file_names_size
9753 * sizeof (*lh
->file_names
)));
9756 fe
= &lh
->file_names
[lh
->num_file_names
++];
9758 fe
->dir_index
= dir_index
;
9759 fe
->mod_time
= mod_time
;
9760 fe
->length
= length
;
9766 /* Read the statement program header starting at OFFSET in
9767 .debug_line, according to the endianness of ABFD. Return a pointer
9768 to a struct line_header, allocated using xmalloc.
9770 NOTE: the strings in the include directory and file name tables of
9771 the returned object point into debug_line_buffer, and must not be
9773 static struct line_header
*
9774 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
9775 struct dwarf2_cu
*cu
)
9777 struct cleanup
*back_to
;
9778 struct line_header
*lh
;
9780 unsigned int bytes_read
, offset_size
;
9782 char *cur_dir
, *cur_file
;
9784 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
9785 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
9787 complaint (&symfile_complaints
, _("missing .debug_line section"));
9791 /* Make sure that at least there's room for the total_length field.
9792 That could be 12 bytes long, but we're just going to fudge that. */
9793 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
9795 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9799 lh
= xmalloc (sizeof (*lh
));
9800 memset (lh
, 0, sizeof (*lh
));
9801 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
9804 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
9806 /* Read in the header. */
9808 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
9809 &bytes_read
, &offset_size
);
9810 line_ptr
+= bytes_read
;
9811 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
9812 + dwarf2_per_objfile
->line
.size
))
9814 dwarf2_statement_list_fits_in_line_number_section_complaint ();
9817 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
9818 lh
->version
= read_2_bytes (abfd
, line_ptr
);
9820 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
9821 line_ptr
+= offset_size
;
9822 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
9824 if (lh
->version
>= 4)
9826 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
9830 lh
->maximum_ops_per_instruction
= 1;
9832 if (lh
->maximum_ops_per_instruction
== 0)
9834 lh
->maximum_ops_per_instruction
= 1;
9835 complaint (&symfile_complaints
,
9836 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
9839 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
9841 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
9843 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
9845 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
9847 lh
->standard_opcode_lengths
9848 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
9850 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
9851 for (i
= 1; i
< lh
->opcode_base
; ++i
)
9853 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
9857 /* Read directory table. */
9858 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9860 line_ptr
+= bytes_read
;
9861 add_include_dir (lh
, cur_dir
);
9863 line_ptr
+= bytes_read
;
9865 /* Read file name table. */
9866 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
9868 unsigned int dir_index
, mod_time
, length
;
9870 line_ptr
+= bytes_read
;
9871 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9872 line_ptr
+= bytes_read
;
9873 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9874 line_ptr
+= bytes_read
;
9875 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
9876 line_ptr
+= bytes_read
;
9878 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
9880 line_ptr
+= bytes_read
;
9881 lh
->statement_program_start
= line_ptr
;
9883 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
9884 + dwarf2_per_objfile
->line
.size
))
9885 complaint (&symfile_complaints
,
9886 _("line number info header doesn't fit in `.debug_line' section"));
9888 discard_cleanups (back_to
);
9892 /* This function exists to work around a bug in certain compilers
9893 (particularly GCC 2.95), in which the first line number marker of a
9894 function does not show up until after the prologue, right before
9895 the second line number marker. This function shifts ADDRESS down
9896 to the beginning of the function if necessary, and is called on
9897 addresses passed to record_line. */
9900 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
9902 struct function_range
*fn
;
9904 /* Find the function_range containing address. */
9909 cu
->cached_fn
= cu
->first_fn
;
9913 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
9919 while (fn
&& fn
!= cu
->cached_fn
)
9920 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
9930 if (address
!= fn
->lowpc
)
9931 complaint (&symfile_complaints
,
9932 _("misplaced first line number at 0x%lx for '%s'"),
9933 (unsigned long) address
, fn
->name
);
9938 /* Subroutine of dwarf_decode_lines to simplify it.
9939 Return the file name of the psymtab for included file FILE_INDEX
9940 in line header LH of PST.
9941 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
9942 If space for the result is malloc'd, it will be freed by a cleanup.
9943 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
9946 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
9947 const struct partial_symtab
*pst
,
9948 const char *comp_dir
)
9950 const struct file_entry fe
= lh
->file_names
[file_index
];
9951 char *include_name
= fe
.name
;
9952 char *include_name_to_compare
= include_name
;
9953 char *dir_name
= NULL
;
9958 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
9960 if (!IS_ABSOLUTE_PATH (include_name
)
9961 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
9963 /* Avoid creating a duplicate psymtab for PST.
9964 We do this by comparing INCLUDE_NAME and PST_FILENAME.
9965 Before we do the comparison, however, we need to account
9966 for DIR_NAME and COMP_DIR.
9967 First prepend dir_name (if non-NULL). If we still don't
9968 have an absolute path prepend comp_dir (if non-NULL).
9969 However, the directory we record in the include-file's
9970 psymtab does not contain COMP_DIR (to match the
9971 corresponding symtab(s)).
9976 bash$ gcc -g ./hello.c
9977 include_name = "hello.c"
9979 DW_AT_comp_dir = comp_dir = "/tmp"
9980 DW_AT_name = "./hello.c" */
9982 if (dir_name
!= NULL
)
9984 include_name
= concat (dir_name
, SLASH_STRING
,
9985 include_name
, (char *)NULL
);
9986 include_name_to_compare
= include_name
;
9987 make_cleanup (xfree
, include_name
);
9989 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
9991 include_name_to_compare
= concat (comp_dir
, SLASH_STRING
,
9992 include_name
, (char *)NULL
);
9996 pst_filename
= pst
->filename
;
9997 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
9999 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
10000 pst_filename
, (char *)NULL
);
10003 file_is_pst
= strcmp (include_name_to_compare
, pst_filename
) == 0;
10005 if (include_name_to_compare
!= include_name
)
10006 xfree (include_name_to_compare
);
10007 if (pst_filename
!= pst
->filename
)
10008 xfree (pst_filename
);
10012 return include_name
;
10015 /* Decode the Line Number Program (LNP) for the given line_header
10016 structure and CU. The actual information extracted and the type
10017 of structures created from the LNP depends on the value of PST.
10019 1. If PST is NULL, then this procedure uses the data from the program
10020 to create all necessary symbol tables, and their linetables.
10022 2. If PST is not NULL, this procedure reads the program to determine
10023 the list of files included by the unit represented by PST, and
10024 builds all the associated partial symbol tables.
10026 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
10027 It is used for relative paths in the line table.
10028 NOTE: When processing partial symtabs (pst != NULL),
10029 comp_dir == pst->dirname.
10031 NOTE: It is important that psymtabs have the same file name (via strcmp)
10032 as the corresponding symtab. Since COMP_DIR is not used in the name of the
10033 symtab we don't use it in the name of the psymtabs we create.
10034 E.g. expand_line_sal requires this when finding psymtabs to expand.
10035 A good testcase for this is mb-inline.exp. */
10038 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
10039 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
10041 gdb_byte
*line_ptr
, *extended_end
;
10042 gdb_byte
*line_end
;
10043 unsigned int bytes_read
, extended_len
;
10044 unsigned char op_code
, extended_op
, adj_opcode
;
10045 CORE_ADDR baseaddr
;
10046 struct objfile
*objfile
= cu
->objfile
;
10047 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10048 const int decode_for_pst_p
= (pst
!= NULL
);
10049 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
10051 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10053 line_ptr
= lh
->statement_program_start
;
10054 line_end
= lh
->statement_program_end
;
10056 /* Read the statement sequences until there's nothing left. */
10057 while (line_ptr
< line_end
)
10059 /* state machine registers */
10060 CORE_ADDR address
= 0;
10061 unsigned int file
= 1;
10062 unsigned int line
= 1;
10063 unsigned int column
= 0;
10064 int is_stmt
= lh
->default_is_stmt
;
10065 int basic_block
= 0;
10066 int end_sequence
= 0;
10068 unsigned char op_index
= 0;
10070 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
10072 /* Start a subfile for the current file of the state machine. */
10073 /* lh->include_dirs and lh->file_names are 0-based, but the
10074 directory and file name numbers in the statement program
10076 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10080 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10082 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10085 /* Decode the table. */
10086 while (!end_sequence
)
10088 op_code
= read_1_byte (abfd
, line_ptr
);
10090 if (line_ptr
> line_end
)
10092 dwarf2_debug_line_missing_end_sequence_complaint ();
10096 if (op_code
>= lh
->opcode_base
)
10098 /* Special operand. */
10099 adj_opcode
= op_code
- lh
->opcode_base
;
10100 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
10101 / lh
->maximum_ops_per_instruction
)
10102 * lh
->minimum_instruction_length
);
10103 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
10104 % lh
->maximum_ops_per_instruction
);
10105 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
10106 if (lh
->num_file_names
< file
|| file
== 0)
10107 dwarf2_debug_line_missing_file_complaint ();
10108 /* For now we ignore lines not starting on an
10109 instruction boundary. */
10110 else if (op_index
== 0)
10112 lh
->file_names
[file
- 1].included_p
= 1;
10113 if (!decode_for_pst_p
&& is_stmt
)
10115 if (last_subfile
!= current_subfile
)
10117 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10119 record_line (last_subfile
, 0, addr
);
10120 last_subfile
= current_subfile
;
10122 /* Append row to matrix using current values. */
10123 addr
= check_cu_functions (address
, cu
);
10124 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10125 record_line (current_subfile
, line
, addr
);
10130 else switch (op_code
)
10132 case DW_LNS_extended_op
:
10133 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10134 line_ptr
+= bytes_read
;
10135 extended_end
= line_ptr
+ extended_len
;
10136 extended_op
= read_1_byte (abfd
, line_ptr
);
10138 switch (extended_op
)
10140 case DW_LNE_end_sequence
:
10143 case DW_LNE_set_address
:
10144 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
10146 line_ptr
+= bytes_read
;
10147 address
+= baseaddr
;
10149 case DW_LNE_define_file
:
10152 unsigned int dir_index
, mod_time
, length
;
10154 cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
);
10155 line_ptr
+= bytes_read
;
10157 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10158 line_ptr
+= bytes_read
;
10160 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10161 line_ptr
+= bytes_read
;
10163 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10164 line_ptr
+= bytes_read
;
10165 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
10168 case DW_LNE_set_discriminator
:
10169 /* The discriminator is not interesting to the debugger;
10171 line_ptr
= extended_end
;
10174 complaint (&symfile_complaints
,
10175 _("mangled .debug_line section"));
10178 /* Make sure that we parsed the extended op correctly. If e.g.
10179 we expected a different address size than the producer used,
10180 we may have read the wrong number of bytes. */
10181 if (line_ptr
!= extended_end
)
10183 complaint (&symfile_complaints
,
10184 _("mangled .debug_line section"));
10189 if (lh
->num_file_names
< file
|| file
== 0)
10190 dwarf2_debug_line_missing_file_complaint ();
10193 lh
->file_names
[file
- 1].included_p
= 1;
10194 if (!decode_for_pst_p
&& is_stmt
)
10196 if (last_subfile
!= current_subfile
)
10198 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10200 record_line (last_subfile
, 0, addr
);
10201 last_subfile
= current_subfile
;
10203 addr
= check_cu_functions (address
, cu
);
10204 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
10205 record_line (current_subfile
, line
, addr
);
10210 case DW_LNS_advance_pc
:
10213 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10215 address
+= (((op_index
+ adjust
)
10216 / lh
->maximum_ops_per_instruction
)
10217 * lh
->minimum_instruction_length
);
10218 op_index
= ((op_index
+ adjust
)
10219 % lh
->maximum_ops_per_instruction
);
10220 line_ptr
+= bytes_read
;
10223 case DW_LNS_advance_line
:
10224 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
10225 line_ptr
+= bytes_read
;
10227 case DW_LNS_set_file
:
10229 /* The arrays lh->include_dirs and lh->file_names are
10230 0-based, but the directory and file name numbers in
10231 the statement program are 1-based. */
10232 struct file_entry
*fe
;
10235 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10236 line_ptr
+= bytes_read
;
10237 if (lh
->num_file_names
< file
|| file
== 0)
10238 dwarf2_debug_line_missing_file_complaint ();
10241 fe
= &lh
->file_names
[file
- 1];
10243 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10244 if (!decode_for_pst_p
)
10246 last_subfile
= current_subfile
;
10247 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10252 case DW_LNS_set_column
:
10253 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10254 line_ptr
+= bytes_read
;
10256 case DW_LNS_negate_stmt
:
10257 is_stmt
= (!is_stmt
);
10259 case DW_LNS_set_basic_block
:
10262 /* Add to the address register of the state machine the
10263 address increment value corresponding to special opcode
10264 255. I.e., this value is scaled by the minimum
10265 instruction length since special opcode 255 would have
10266 scaled the the increment. */
10267 case DW_LNS_const_add_pc
:
10269 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
10271 address
+= (((op_index
+ adjust
)
10272 / lh
->maximum_ops_per_instruction
)
10273 * lh
->minimum_instruction_length
);
10274 op_index
= ((op_index
+ adjust
)
10275 % lh
->maximum_ops_per_instruction
);
10278 case DW_LNS_fixed_advance_pc
:
10279 address
+= read_2_bytes (abfd
, line_ptr
);
10285 /* Unknown standard opcode, ignore it. */
10288 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
10290 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
10291 line_ptr
+= bytes_read
;
10296 if (lh
->num_file_names
< file
|| file
== 0)
10297 dwarf2_debug_line_missing_file_complaint ();
10300 lh
->file_names
[file
- 1].included_p
= 1;
10301 if (!decode_for_pst_p
)
10303 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
10304 record_line (current_subfile
, 0, addr
);
10309 if (decode_for_pst_p
)
10313 /* Now that we're done scanning the Line Header Program, we can
10314 create the psymtab of each included file. */
10315 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
10316 if (lh
->file_names
[file_index
].included_p
== 1)
10318 char *include_name
=
10319 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
);
10320 if (include_name
!= NULL
)
10321 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
10326 /* Make sure a symtab is created for every file, even files
10327 which contain only variables (i.e. no code with associated
10331 struct file_entry
*fe
;
10333 for (i
= 0; i
< lh
->num_file_names
; i
++)
10337 fe
= &lh
->file_names
[i
];
10339 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10340 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
10342 /* Skip the main file; we don't need it, and it must be
10343 allocated last, so that it will show up before the
10344 non-primary symtabs in the objfile's symtab list. */
10345 if (current_subfile
== first_subfile
)
10348 if (current_subfile
->symtab
== NULL
)
10349 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
10351 fe
->symtab
= current_subfile
->symtab
;
10356 /* Start a subfile for DWARF. FILENAME is the name of the file and
10357 DIRNAME the name of the source directory which contains FILENAME
10358 or NULL if not known. COMP_DIR is the compilation directory for the
10359 linetable's compilation unit or NULL if not known.
10360 This routine tries to keep line numbers from identical absolute and
10361 relative file names in a common subfile.
10363 Using the `list' example from the GDB testsuite, which resides in
10364 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
10365 of /srcdir/list0.c yields the following debugging information for list0.c:
10367 DW_AT_name: /srcdir/list0.c
10368 DW_AT_comp_dir: /compdir
10369 files.files[0].name: list0.h
10370 files.files[0].dir: /srcdir
10371 files.files[1].name: list0.c
10372 files.files[1].dir: /srcdir
10374 The line number information for list0.c has to end up in a single
10375 subfile, so that `break /srcdir/list0.c:1' works as expected.
10376 start_subfile will ensure that this happens provided that we pass the
10377 concatenation of files.files[1].dir and files.files[1].name as the
10381 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
10385 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
10386 `start_symtab' will always pass the contents of DW_AT_comp_dir as
10387 second argument to start_subfile. To be consistent, we do the
10388 same here. In order not to lose the line information directory,
10389 we concatenate it to the filename when it makes sense.
10390 Note that the Dwarf3 standard says (speaking of filenames in line
10391 information): ``The directory index is ignored for file names
10392 that represent full path names''. Thus ignoring dirname in the
10393 `else' branch below isn't an issue. */
10395 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
10396 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
10398 fullname
= filename
;
10400 start_subfile (fullname
, comp_dir
);
10402 if (fullname
!= filename
)
10407 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
10408 struct dwarf2_cu
*cu
)
10410 struct objfile
*objfile
= cu
->objfile
;
10411 struct comp_unit_head
*cu_header
= &cu
->header
;
10413 /* NOTE drow/2003-01-30: There used to be a comment and some special
10414 code here to turn a symbol with DW_AT_external and a
10415 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
10416 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
10417 with some versions of binutils) where shared libraries could have
10418 relocations against symbols in their debug information - the
10419 minimal symbol would have the right address, but the debug info
10420 would not. It's no longer necessary, because we will explicitly
10421 apply relocations when we read in the debug information now. */
10423 /* A DW_AT_location attribute with no contents indicates that a
10424 variable has been optimized away. */
10425 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
10427 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10431 /* Handle one degenerate form of location expression specially, to
10432 preserve GDB's previous behavior when section offsets are
10433 specified. If this is just a DW_OP_addr then mark this symbol
10436 if (attr_form_is_block (attr
)
10437 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
10438 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
10440 unsigned int dummy
;
10442 SYMBOL_VALUE_ADDRESS (sym
) =
10443 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
10444 SYMBOL_CLASS (sym
) = LOC_STATIC
;
10445 fixup_symbol_section (sym
, objfile
);
10446 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
10447 SYMBOL_SECTION (sym
));
10451 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
10452 expression evaluator, and use LOC_COMPUTED only when necessary
10453 (i.e. when the value of a register or memory location is
10454 referenced, or a thread-local block, etc.). Then again, it might
10455 not be worthwhile. I'm assuming that it isn't unless performance
10456 or memory numbers show me otherwise. */
10458 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
10459 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
10462 /* Given a pointer to a DWARF information entry, figure out if we need
10463 to make a symbol table entry for it, and if so, create a new entry
10464 and return a pointer to it.
10465 If TYPE is NULL, determine symbol type from the die, otherwise
10466 used the passed type.
10467 If SPACE is not NULL, use it to hold the new symbol. If it is
10468 NULL, allocate a new symbol on the objfile's obstack. */
10470 static struct symbol
*
10471 new_symbol_full (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
10472 struct symbol
*space
)
10474 struct objfile
*objfile
= cu
->objfile
;
10475 struct symbol
*sym
= NULL
;
10477 struct attribute
*attr
= NULL
;
10478 struct attribute
*attr2
= NULL
;
10479 CORE_ADDR baseaddr
;
10480 struct pending
**list_to_add
= NULL
;
10482 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
10484 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10486 name
= dwarf2_name (die
, cu
);
10489 const char *linkagename
;
10490 int suppress_add
= 0;
10495 sym
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
10496 OBJSTAT (objfile
, n_syms
++);
10498 /* Cache this symbol's name and the name's demangled form (if any). */
10499 SYMBOL_SET_LANGUAGE (sym
, cu
->language
);
10500 linkagename
= dwarf2_physname (name
, die
, cu
);
10501 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
10503 /* Fortran does not have mangling standard and the mangling does differ
10504 between gfortran, iFort etc. */
10505 if (cu
->language
== language_fortran
10506 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
10507 symbol_set_demangled_name (&(sym
->ginfo
),
10508 (char *) dwarf2_full_name (name
, die
, cu
),
10511 /* Default assumptions.
10512 Use the passed type or decode it from the die. */
10513 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10514 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
10516 SYMBOL_TYPE (sym
) = type
;
10518 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
10519 attr
= dwarf2_attr (die
,
10520 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
10524 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
10527 attr
= dwarf2_attr (die
,
10528 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
10532 int file_index
= DW_UNSND (attr
);
10534 if (cu
->line_header
== NULL
10535 || file_index
> cu
->line_header
->num_file_names
)
10536 complaint (&symfile_complaints
,
10537 _("file index out of range"));
10538 else if (file_index
> 0)
10540 struct file_entry
*fe
;
10542 fe
= &cu
->line_header
->file_names
[file_index
- 1];
10543 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
10550 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
10553 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
10555 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
10556 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
10557 SYMBOL_CLASS (sym
) = LOC_LABEL
;
10558 add_symbol_to_list (sym
, cu
->list_in_scope
);
10560 case DW_TAG_subprogram
:
10561 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10563 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10564 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10565 if ((attr2
&& (DW_UNSND (attr2
) != 0))
10566 || cu
->language
== language_ada
)
10568 /* Subprograms marked external are stored as a global symbol.
10569 Ada subprograms, whether marked external or not, are always
10570 stored as a global symbol, because we want to be able to
10571 access them globally. For instance, we want to be able
10572 to break on a nested subprogram without having to
10573 specify the context. */
10574 list_to_add
= &global_symbols
;
10578 list_to_add
= cu
->list_in_scope
;
10581 case DW_TAG_inlined_subroutine
:
10582 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
10584 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
10585 SYMBOL_INLINED (sym
) = 1;
10586 /* Do not add the symbol to any lists. It will be found via
10587 BLOCK_FUNCTION from the blockvector. */
10589 case DW_TAG_template_value_param
:
10591 /* Fall through. */
10592 case DW_TAG_constant
:
10593 case DW_TAG_variable
:
10594 case DW_TAG_member
:
10595 /* Compilation with minimal debug info may result in variables
10596 with missing type entries. Change the misleading `void' type
10597 to something sensible. */
10598 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
10600 = objfile_type (objfile
)->nodebug_data_symbol
;
10602 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10603 /* In the case of DW_TAG_member, we should only be called for
10604 static const members. */
10605 if (die
->tag
== DW_TAG_member
)
10607 /* dwarf2_add_field uses die_is_declaration,
10608 so we do the same. */
10609 gdb_assert (die_is_declaration (die
, cu
));
10614 dwarf2_const_value (attr
, sym
, cu
);
10615 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10618 if (attr2
&& (DW_UNSND (attr2
) != 0))
10619 list_to_add
= &global_symbols
;
10621 list_to_add
= cu
->list_in_scope
;
10625 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10628 var_decode_location (attr
, sym
, cu
);
10629 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10630 if (SYMBOL_CLASS (sym
) == LOC_STATIC
10631 && SYMBOL_VALUE_ADDRESS (sym
) == 0
10632 && !dwarf2_per_objfile
->has_section_at_zero
)
10634 /* When a static variable is eliminated by the linker,
10635 the corresponding debug information is not stripped
10636 out, but the variable address is set to null;
10637 do not add such variables into symbol table. */
10639 else if (attr2
&& (DW_UNSND (attr2
) != 0))
10641 /* Workaround gfortran PR debug/40040 - it uses
10642 DW_AT_location for variables in -fPIC libraries which may
10643 get overriden by other libraries/executable and get
10644 a different address. Resolve it by the minimal symbol
10645 which may come from inferior's executable using copy
10646 relocation. Make this workaround only for gfortran as for
10647 other compilers GDB cannot guess the minimal symbol
10648 Fortran mangling kind. */
10649 if (cu
->language
== language_fortran
&& die
->parent
10650 && die
->parent
->tag
== DW_TAG_module
10652 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
10653 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10655 /* A variable with DW_AT_external is never static,
10656 but it may be block-scoped. */
10657 list_to_add
= (cu
->list_in_scope
== &file_symbols
10658 ? &global_symbols
: cu
->list_in_scope
);
10661 list_to_add
= cu
->list_in_scope
;
10665 /* We do not know the address of this symbol.
10666 If it is an external symbol and we have type information
10667 for it, enter the symbol as a LOC_UNRESOLVED symbol.
10668 The address of the variable will then be determined from
10669 the minimal symbol table whenever the variable is
10671 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
10672 if (attr2
&& (DW_UNSND (attr2
) != 0)
10673 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
10675 /* A variable with DW_AT_external is never static, but it
10676 may be block-scoped. */
10677 list_to_add
= (cu
->list_in_scope
== &file_symbols
10678 ? &global_symbols
: cu
->list_in_scope
);
10680 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
10682 else if (!die_is_declaration (die
, cu
))
10684 /* Use the default LOC_OPTIMIZED_OUT class. */
10685 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
10687 list_to_add
= cu
->list_in_scope
;
10691 case DW_TAG_formal_parameter
:
10692 /* If we are inside a function, mark this as an argument. If
10693 not, we might be looking at an argument to an inlined function
10694 when we do not have enough information to show inlined frames;
10695 pretend it's a local variable in that case so that the user can
10697 if (context_stack_depth
> 0
10698 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
10699 SYMBOL_IS_ARGUMENT (sym
) = 1;
10700 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10703 var_decode_location (attr
, sym
, cu
);
10705 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10708 dwarf2_const_value (attr
, sym
, cu
);
10710 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
10711 if (attr
&& DW_UNSND (attr
))
10713 struct type
*ref_type
;
10715 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
10716 SYMBOL_TYPE (sym
) = ref_type
;
10719 list_to_add
= cu
->list_in_scope
;
10721 case DW_TAG_unspecified_parameters
:
10722 /* From varargs functions; gdb doesn't seem to have any
10723 interest in this information, so just ignore it for now.
10726 case DW_TAG_template_type_param
:
10728 /* Fall through. */
10729 case DW_TAG_class_type
:
10730 case DW_TAG_interface_type
:
10731 case DW_TAG_structure_type
:
10732 case DW_TAG_union_type
:
10733 case DW_TAG_set_type
:
10734 case DW_TAG_enumeration_type
:
10735 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10736 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
10739 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
10740 really ever be static objects: otherwise, if you try
10741 to, say, break of a class's method and you're in a file
10742 which doesn't mention that class, it won't work unless
10743 the check for all static symbols in lookup_symbol_aux
10744 saves you. See the OtherFileClass tests in
10745 gdb.c++/namespace.exp. */
10749 list_to_add
= (cu
->list_in_scope
== &file_symbols
10750 && (cu
->language
== language_cplus
10751 || cu
->language
== language_java
)
10752 ? &global_symbols
: cu
->list_in_scope
);
10754 /* The semantics of C++ state that "struct foo {
10755 ... }" also defines a typedef for "foo". A Java
10756 class declaration also defines a typedef for the
10758 if (cu
->language
== language_cplus
10759 || cu
->language
== language_java
10760 || cu
->language
== language_ada
)
10762 /* The symbol's name is already allocated along
10763 with this objfile, so we don't need to
10764 duplicate it for the type. */
10765 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
10766 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
10771 case DW_TAG_typedef
:
10772 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10773 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10774 list_to_add
= cu
->list_in_scope
;
10776 case DW_TAG_base_type
:
10777 case DW_TAG_subrange_type
:
10778 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10779 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
10780 list_to_add
= cu
->list_in_scope
;
10782 case DW_TAG_enumerator
:
10783 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
10786 dwarf2_const_value (attr
, sym
, cu
);
10789 /* NOTE: carlton/2003-11-10: See comment above in the
10790 DW_TAG_class_type, etc. block. */
10792 list_to_add
= (cu
->list_in_scope
== &file_symbols
10793 && (cu
->language
== language_cplus
10794 || cu
->language
== language_java
)
10795 ? &global_symbols
: cu
->list_in_scope
);
10798 case DW_TAG_namespace
:
10799 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
10800 list_to_add
= &global_symbols
;
10803 /* Not a tag we recognize. Hopefully we aren't processing
10804 trash data, but since we must specifically ignore things
10805 we don't recognize, there is nothing else we should do at
10807 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
10808 dwarf_tag_name (die
->tag
));
10814 sym
->hash_next
= objfile
->template_symbols
;
10815 objfile
->template_symbols
= sym
;
10816 list_to_add
= NULL
;
10819 if (list_to_add
!= NULL
)
10820 add_symbol_to_list (sym
, list_to_add
);
10822 /* For the benefit of old versions of GCC, check for anonymous
10823 namespaces based on the demangled name. */
10824 if (!processing_has_namespace_info
10825 && cu
->language
== language_cplus
)
10826 cp_scan_for_anonymous_namespaces (sym
);
10831 /* A wrapper for new_symbol_full that always allocates a new symbol. */
10833 static struct symbol
*
10834 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10836 return new_symbol_full (die
, type
, cu
, NULL
);
10839 /* Given an attr with a DW_FORM_dataN value in host byte order,
10840 zero-extend it as appropriate for the symbol's type. The DWARF
10841 standard (v4) is not entirely clear about the meaning of using
10842 DW_FORM_dataN for a constant with a signed type, where the type is
10843 wider than the data. The conclusion of a discussion on the DWARF
10844 list was that this is unspecified. We choose to always zero-extend
10845 because that is the interpretation long in use by GCC. */
10848 dwarf2_const_value_data (struct attribute
*attr
, struct type
*type
,
10849 const char *name
, struct obstack
*obstack
,
10850 struct dwarf2_cu
*cu
, long *value
, int bits
)
10852 struct objfile
*objfile
= cu
->objfile
;
10853 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
10854 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
10855 LONGEST l
= DW_UNSND (attr
);
10857 if (bits
< sizeof (*value
) * 8)
10859 l
&= ((LONGEST
) 1 << bits
) - 1;
10862 else if (bits
== sizeof (*value
) * 8)
10866 gdb_byte
*bytes
= obstack_alloc (obstack
, bits
/ 8);
10867 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
10874 /* Read a constant value from an attribute. Either set *VALUE, or if
10875 the value does not fit in *VALUE, set *BYTES - either already
10876 allocated on the objfile obstack, or newly allocated on OBSTACK,
10877 or, set *BATON, if we translated the constant to a location
10881 dwarf2_const_value_attr (struct attribute
*attr
, struct type
*type
,
10882 const char *name
, struct obstack
*obstack
,
10883 struct dwarf2_cu
*cu
,
10884 long *value
, gdb_byte
**bytes
,
10885 struct dwarf2_locexpr_baton
**baton
)
10887 struct objfile
*objfile
= cu
->objfile
;
10888 struct comp_unit_head
*cu_header
= &cu
->header
;
10889 struct dwarf_block
*blk
;
10890 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
10891 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
10897 switch (attr
->form
)
10903 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
10904 dwarf2_const_value_length_mismatch_complaint (name
,
10905 cu_header
->addr_size
,
10906 TYPE_LENGTH (type
));
10907 /* Symbols of this form are reasonably rare, so we just
10908 piggyback on the existing location code rather than writing
10909 a new implementation of symbol_computed_ops. */
10910 *baton
= obstack_alloc (&objfile
->objfile_obstack
,
10911 sizeof (struct dwarf2_locexpr_baton
));
10912 (*baton
)->per_cu
= cu
->per_cu
;
10913 gdb_assert ((*baton
)->per_cu
);
10915 (*baton
)->size
= 2 + cu_header
->addr_size
;
10916 data
= obstack_alloc (&objfile
->objfile_obstack
, (*baton
)->size
);
10917 (*baton
)->data
= data
;
10919 data
[0] = DW_OP_addr
;
10920 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
10921 byte_order
, DW_ADDR (attr
));
10922 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
10925 case DW_FORM_string
:
10927 /* DW_STRING is already allocated on the objfile obstack, point
10929 *bytes
= (gdb_byte
*) DW_STRING (attr
);
10931 case DW_FORM_block1
:
10932 case DW_FORM_block2
:
10933 case DW_FORM_block4
:
10934 case DW_FORM_block
:
10935 case DW_FORM_exprloc
:
10936 blk
= DW_BLOCK (attr
);
10937 if (TYPE_LENGTH (type
) != blk
->size
)
10938 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
10939 TYPE_LENGTH (type
));
10940 *bytes
= blk
->data
;
10943 /* The DW_AT_const_value attributes are supposed to carry the
10944 symbol's value "represented as it would be on the target
10945 architecture." By the time we get here, it's already been
10946 converted to host endianness, so we just need to sign- or
10947 zero-extend it as appropriate. */
10948 case DW_FORM_data1
:
10949 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 8);
10951 case DW_FORM_data2
:
10952 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 16);
10954 case DW_FORM_data4
:
10955 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 32);
10957 case DW_FORM_data8
:
10958 *bytes
= dwarf2_const_value_data (attr
, type
, name
, obstack
, cu
, value
, 64);
10961 case DW_FORM_sdata
:
10962 *value
= DW_SND (attr
);
10965 case DW_FORM_udata
:
10966 *value
= DW_UNSND (attr
);
10970 complaint (&symfile_complaints
,
10971 _("unsupported const value attribute form: '%s'"),
10972 dwarf_form_name (attr
->form
));
10979 /* Copy constant value from an attribute to a symbol. */
10982 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
10983 struct dwarf2_cu
*cu
)
10985 struct objfile
*objfile
= cu
->objfile
;
10986 struct comp_unit_head
*cu_header
= &cu
->header
;
10989 struct dwarf2_locexpr_baton
*baton
;
10991 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
10992 SYMBOL_PRINT_NAME (sym
),
10993 &objfile
->objfile_obstack
, cu
,
10994 &value
, &bytes
, &baton
);
10998 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
10999 SYMBOL_LOCATION_BATON (sym
) = baton
;
11000 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
11002 else if (bytes
!= NULL
)
11004 SYMBOL_VALUE_BYTES (sym
) = bytes
;
11005 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
11009 SYMBOL_VALUE (sym
) = value
;
11010 SYMBOL_CLASS (sym
) = LOC_CONST
;
11014 /* Return the type of the die in question using its DW_AT_type attribute. */
11016 static struct type
*
11017 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11019 struct attribute
*type_attr
;
11021 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
11024 /* A missing DW_AT_type represents a void type. */
11025 return objfile_type (cu
->objfile
)->builtin_void
;
11028 return lookup_die_type (die
, type_attr
, cu
);
11031 /* True iff CU's producer generates GNAT Ada auxiliary information
11032 that allows to find parallel types through that information instead
11033 of having to do expensive parallel lookups by type name. */
11036 need_gnat_info (struct dwarf2_cu
*cu
)
11038 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
11039 of GNAT produces this auxiliary information, without any indication
11040 that it is produced. Part of enhancing the FSF version of GNAT
11041 to produce that information will be to put in place an indicator
11042 that we can use in order to determine whether the descriptive type
11043 info is available or not. One suggestion that has been made is
11044 to use a new attribute, attached to the CU die. For now, assume
11045 that the descriptive type info is not available. */
11049 /* Return the auxiliary type of the die in question using its
11050 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
11051 attribute is not present. */
11053 static struct type
*
11054 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11056 struct attribute
*type_attr
;
11058 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
11062 return lookup_die_type (die
, type_attr
, cu
);
11065 /* If DIE has a descriptive_type attribute, then set the TYPE's
11066 descriptive type accordingly. */
11069 set_descriptive_type (struct type
*type
, struct die_info
*die
,
11070 struct dwarf2_cu
*cu
)
11072 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
11074 if (descriptive_type
)
11076 ALLOCATE_GNAT_AUX_TYPE (type
);
11077 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
11081 /* Return the containing type of the die in question using its
11082 DW_AT_containing_type attribute. */
11084 static struct type
*
11085 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11087 struct attribute
*type_attr
;
11089 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
11091 error (_("Dwarf Error: Problem turning containing type into gdb type "
11092 "[in module %s]"), cu
->objfile
->name
);
11094 return lookup_die_type (die
, type_attr
, cu
);
11097 /* Look up the type of DIE in CU using its type attribute ATTR.
11098 If there is no type substitute an error marker. */
11100 static struct type
*
11101 lookup_die_type (struct die_info
*die
, struct attribute
*attr
,
11102 struct dwarf2_cu
*cu
)
11104 struct type
*this_type
;
11106 /* First see if we have it cached. */
11108 if (is_ref_attr (attr
))
11110 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
11112 this_type
= get_die_type_at_offset (offset
, cu
->per_cu
);
11114 else if (attr
->form
== DW_FORM_sig8
)
11116 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11117 struct dwarf2_cu
*sig_cu
;
11118 unsigned int offset
;
11120 /* sig_type will be NULL if the signatured type is missing from
11122 if (sig_type
== NULL
)
11123 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11124 "at 0x%x [in module %s]"),
11125 die
->offset
, cu
->objfile
->name
);
11127 gdb_assert (sig_type
->per_cu
.from_debug_types
);
11128 offset
= sig_type
->offset
+ sig_type
->type_offset
;
11129 this_type
= get_die_type_at_offset (offset
, &sig_type
->per_cu
);
11133 dump_die_for_error (die
);
11134 error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
11135 dwarf_attr_name (attr
->name
), cu
->objfile
->name
);
11138 /* If not cached we need to read it in. */
11140 if (this_type
== NULL
)
11142 struct die_info
*type_die
;
11143 struct dwarf2_cu
*type_cu
= cu
;
11145 type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
11146 /* If the type is cached, we should have found it above. */
11147 gdb_assert (get_die_type (type_die
, type_cu
) == NULL
);
11148 this_type
= read_type_die_1 (type_die
, type_cu
);
11151 /* If we still don't have a type use an error marker. */
11153 if (this_type
== NULL
)
11155 char *message
, *saved
;
11157 /* read_type_die already issued a complaint. */
11158 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
11162 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
11163 message
, strlen (message
));
11166 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
11172 /* Return the type in DIE, CU.
11173 Returns NULL for invalid types.
11175 This first does a lookup in the appropriate type_hash table,
11176 and only reads the die in if necessary.
11178 NOTE: This can be called when reading in partial or full symbols. */
11180 static struct type
*
11181 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
11183 struct type
*this_type
;
11185 this_type
= get_die_type (die
, cu
);
11189 return read_type_die_1 (die
, cu
);
11192 /* Read the type in DIE, CU.
11193 Returns NULL for invalid types. */
11195 static struct type
*
11196 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
11198 struct type
*this_type
= NULL
;
11202 case DW_TAG_class_type
:
11203 case DW_TAG_interface_type
:
11204 case DW_TAG_structure_type
:
11205 case DW_TAG_union_type
:
11206 this_type
= read_structure_type (die
, cu
);
11208 case DW_TAG_enumeration_type
:
11209 this_type
= read_enumeration_type (die
, cu
);
11211 case DW_TAG_subprogram
:
11212 case DW_TAG_subroutine_type
:
11213 case DW_TAG_inlined_subroutine
:
11214 this_type
= read_subroutine_type (die
, cu
);
11216 case DW_TAG_array_type
:
11217 this_type
= read_array_type (die
, cu
);
11219 case DW_TAG_set_type
:
11220 this_type
= read_set_type (die
, cu
);
11222 case DW_TAG_pointer_type
:
11223 this_type
= read_tag_pointer_type (die
, cu
);
11225 case DW_TAG_ptr_to_member_type
:
11226 this_type
= read_tag_ptr_to_member_type (die
, cu
);
11228 case DW_TAG_reference_type
:
11229 this_type
= read_tag_reference_type (die
, cu
);
11231 case DW_TAG_const_type
:
11232 this_type
= read_tag_const_type (die
, cu
);
11234 case DW_TAG_volatile_type
:
11235 this_type
= read_tag_volatile_type (die
, cu
);
11237 case DW_TAG_string_type
:
11238 this_type
= read_tag_string_type (die
, cu
);
11240 case DW_TAG_typedef
:
11241 this_type
= read_typedef (die
, cu
);
11243 case DW_TAG_subrange_type
:
11244 this_type
= read_subrange_type (die
, cu
);
11246 case DW_TAG_base_type
:
11247 this_type
= read_base_type (die
, cu
);
11249 case DW_TAG_unspecified_type
:
11250 this_type
= read_unspecified_type (die
, cu
);
11252 case DW_TAG_namespace
:
11253 this_type
= read_namespace_type (die
, cu
);
11255 case DW_TAG_module
:
11256 this_type
= read_module_type (die
, cu
);
11259 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
11260 dwarf_tag_name (die
->tag
));
11267 /* Return the name of the namespace/class that DIE is defined within,
11268 or "" if we can't tell. The caller should not xfree the result.
11270 For example, if we're within the method foo() in the following
11280 then determine_prefix on foo's die will return "N::C". */
11283 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
11285 struct die_info
*parent
, *spec_die
;
11286 struct dwarf2_cu
*spec_cu
;
11287 struct type
*parent_type
;
11289 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
11290 && cu
->language
!= language_fortran
)
11293 /* We have to be careful in the presence of DW_AT_specification.
11294 For example, with GCC 3.4, given the code
11298 // Definition of N::foo.
11302 then we'll have a tree of DIEs like this:
11304 1: DW_TAG_compile_unit
11305 2: DW_TAG_namespace // N
11306 3: DW_TAG_subprogram // declaration of N::foo
11307 4: DW_TAG_subprogram // definition of N::foo
11308 DW_AT_specification // refers to die #3
11310 Thus, when processing die #4, we have to pretend that we're in
11311 the context of its DW_AT_specification, namely the contex of die
11314 spec_die
= die_specification (die
, &spec_cu
);
11315 if (spec_die
== NULL
)
11316 parent
= die
->parent
;
11319 parent
= spec_die
->parent
;
11323 if (parent
== NULL
)
11325 else if (parent
->building_fullname
)
11328 const char *parent_name
;
11330 /* It has been seen on RealView 2.2 built binaries,
11331 DW_TAG_template_type_param types actually _defined_ as
11332 children of the parent class:
11335 template class <class Enum> Class{};
11336 Class<enum E> class_e;
11338 1: DW_TAG_class_type (Class)
11339 2: DW_TAG_enumeration_type (E)
11340 3: DW_TAG_enumerator (enum1:0)
11341 3: DW_TAG_enumerator (enum2:1)
11343 2: DW_TAG_template_type_param
11344 DW_AT_type DW_FORM_ref_udata (E)
11346 Besides being broken debug info, it can put GDB into an
11347 infinite loop. Consider:
11349 When we're building the full name for Class<E>, we'll start
11350 at Class, and go look over its template type parameters,
11351 finding E. We'll then try to build the full name of E, and
11352 reach here. We're now trying to build the full name of E,
11353 and look over the parent DIE for containing scope. In the
11354 broken case, if we followed the parent DIE of E, we'd again
11355 find Class, and once again go look at its template type
11356 arguments, etc., etc. Simply don't consider such parent die
11357 as source-level parent of this die (it can't be, the language
11358 doesn't allow it), and break the loop here. */
11359 name
= dwarf2_name (die
, cu
);
11360 parent_name
= dwarf2_name (parent
, cu
);
11361 complaint (&symfile_complaints
,
11362 _("template param type '%s' defined within parent '%s'"),
11363 name
? name
: "<unknown>",
11364 parent_name
? parent_name
: "<unknown>");
11368 switch (parent
->tag
)
11370 case DW_TAG_namespace
:
11371 parent_type
= read_type_die (parent
, cu
);
11372 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
11373 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
11374 Work around this problem here. */
11375 if (cu
->language
== language_cplus
11376 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
11378 /* We give a name to even anonymous namespaces. */
11379 return TYPE_TAG_NAME (parent_type
);
11380 case DW_TAG_class_type
:
11381 case DW_TAG_interface_type
:
11382 case DW_TAG_structure_type
:
11383 case DW_TAG_union_type
:
11384 case DW_TAG_module
:
11385 parent_type
= read_type_die (parent
, cu
);
11386 if (TYPE_TAG_NAME (parent_type
) != NULL
)
11387 return TYPE_TAG_NAME (parent_type
);
11389 /* An anonymous structure is only allowed non-static data
11390 members; no typedefs, no member functions, et cetera.
11391 So it does not need a prefix. */
11394 return determine_prefix (parent
, cu
);
11398 /* Return a newly-allocated string formed by concatenating PREFIX and
11399 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
11400 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
11401 perform an obconcat, otherwise allocate storage for the result. The CU argument
11402 is used to determine the language and hence, the appropriate separator. */
11404 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
11407 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
11408 int physname
, struct dwarf2_cu
*cu
)
11410 const char *lead
= "";
11413 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
11415 else if (cu
->language
== language_java
)
11417 else if (cu
->language
== language_fortran
&& physname
)
11419 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
11420 DW_AT_MIPS_linkage_name is preferred and used instead. */
11428 if (prefix
== NULL
)
11430 if (suffix
== NULL
)
11435 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
11437 strcpy (retval
, lead
);
11438 strcat (retval
, prefix
);
11439 strcat (retval
, sep
);
11440 strcat (retval
, suffix
);
11445 /* We have an obstack. */
11446 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
11450 /* Return sibling of die, NULL if no sibling. */
11452 static struct die_info
*
11453 sibling_die (struct die_info
*die
)
11455 return die
->sibling
;
11458 /* Get name of a die, return NULL if not found. */
11461 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
11462 struct obstack
*obstack
)
11464 if (name
&& cu
->language
== language_cplus
)
11466 char *canon_name
= cp_canonicalize_string (name
);
11468 if (canon_name
!= NULL
)
11470 if (strcmp (canon_name
, name
) != 0)
11471 name
= obsavestring (canon_name
, strlen (canon_name
),
11473 xfree (canon_name
);
11480 /* Get name of a die, return NULL if not found. */
11483 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
11485 struct attribute
*attr
;
11487 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11488 if (!attr
|| !DW_STRING (attr
))
11493 case DW_TAG_compile_unit
:
11494 /* Compilation units have a DW_AT_name that is a filename, not
11495 a source language identifier. */
11496 case DW_TAG_enumeration_type
:
11497 case DW_TAG_enumerator
:
11498 /* These tags always have simple identifiers already; no need
11499 to canonicalize them. */
11500 return DW_STRING (attr
);
11502 case DW_TAG_subprogram
:
11503 /* Java constructors will all be named "<init>", so return
11504 the class name when we see this special case. */
11505 if (cu
->language
== language_java
11506 && DW_STRING (attr
) != NULL
11507 && strcmp (DW_STRING (attr
), "<init>") == 0)
11509 struct dwarf2_cu
*spec_cu
= cu
;
11510 struct die_info
*spec_die
;
11512 /* GCJ will output '<init>' for Java constructor names.
11513 For this special case, return the name of the parent class. */
11515 /* GCJ may output suprogram DIEs with AT_specification set.
11516 If so, use the name of the specified DIE. */
11517 spec_die
= die_specification (die
, &spec_cu
);
11518 if (spec_die
!= NULL
)
11519 return dwarf2_name (spec_die
, spec_cu
);
11524 if (die
->tag
== DW_TAG_class_type
)
11525 return dwarf2_name (die
, cu
);
11527 while (die
->tag
!= DW_TAG_compile_unit
);
11531 case DW_TAG_class_type
:
11532 case DW_TAG_interface_type
:
11533 case DW_TAG_structure_type
:
11534 case DW_TAG_union_type
:
11535 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
11536 structures or unions. These were of the form "._%d" in GCC 4.1,
11537 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
11538 and GCC 4.4. We work around this problem by ignoring these. */
11539 if (strncmp (DW_STRING (attr
), "._", 2) == 0
11540 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
11548 if (!DW_STRING_IS_CANONICAL (attr
))
11551 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
11552 &cu
->objfile
->objfile_obstack
);
11553 DW_STRING_IS_CANONICAL (attr
) = 1;
11555 return DW_STRING (attr
);
11558 /* Return the die that this die in an extension of, or NULL if there
11559 is none. *EXT_CU is the CU containing DIE on input, and the CU
11560 containing the return value on output. */
11562 static struct die_info
*
11563 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
11565 struct attribute
*attr
;
11567 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
11571 return follow_die_ref (die
, attr
, ext_cu
);
11574 /* Convert a DIE tag into its string name. */
11577 dwarf_tag_name (unsigned tag
)
11581 case DW_TAG_padding
:
11582 return "DW_TAG_padding";
11583 case DW_TAG_array_type
:
11584 return "DW_TAG_array_type";
11585 case DW_TAG_class_type
:
11586 return "DW_TAG_class_type";
11587 case DW_TAG_entry_point
:
11588 return "DW_TAG_entry_point";
11589 case DW_TAG_enumeration_type
:
11590 return "DW_TAG_enumeration_type";
11591 case DW_TAG_formal_parameter
:
11592 return "DW_TAG_formal_parameter";
11593 case DW_TAG_imported_declaration
:
11594 return "DW_TAG_imported_declaration";
11596 return "DW_TAG_label";
11597 case DW_TAG_lexical_block
:
11598 return "DW_TAG_lexical_block";
11599 case DW_TAG_member
:
11600 return "DW_TAG_member";
11601 case DW_TAG_pointer_type
:
11602 return "DW_TAG_pointer_type";
11603 case DW_TAG_reference_type
:
11604 return "DW_TAG_reference_type";
11605 case DW_TAG_compile_unit
:
11606 return "DW_TAG_compile_unit";
11607 case DW_TAG_string_type
:
11608 return "DW_TAG_string_type";
11609 case DW_TAG_structure_type
:
11610 return "DW_TAG_structure_type";
11611 case DW_TAG_subroutine_type
:
11612 return "DW_TAG_subroutine_type";
11613 case DW_TAG_typedef
:
11614 return "DW_TAG_typedef";
11615 case DW_TAG_union_type
:
11616 return "DW_TAG_union_type";
11617 case DW_TAG_unspecified_parameters
:
11618 return "DW_TAG_unspecified_parameters";
11619 case DW_TAG_variant
:
11620 return "DW_TAG_variant";
11621 case DW_TAG_common_block
:
11622 return "DW_TAG_common_block";
11623 case DW_TAG_common_inclusion
:
11624 return "DW_TAG_common_inclusion";
11625 case DW_TAG_inheritance
:
11626 return "DW_TAG_inheritance";
11627 case DW_TAG_inlined_subroutine
:
11628 return "DW_TAG_inlined_subroutine";
11629 case DW_TAG_module
:
11630 return "DW_TAG_module";
11631 case DW_TAG_ptr_to_member_type
:
11632 return "DW_TAG_ptr_to_member_type";
11633 case DW_TAG_set_type
:
11634 return "DW_TAG_set_type";
11635 case DW_TAG_subrange_type
:
11636 return "DW_TAG_subrange_type";
11637 case DW_TAG_with_stmt
:
11638 return "DW_TAG_with_stmt";
11639 case DW_TAG_access_declaration
:
11640 return "DW_TAG_access_declaration";
11641 case DW_TAG_base_type
:
11642 return "DW_TAG_base_type";
11643 case DW_TAG_catch_block
:
11644 return "DW_TAG_catch_block";
11645 case DW_TAG_const_type
:
11646 return "DW_TAG_const_type";
11647 case DW_TAG_constant
:
11648 return "DW_TAG_constant";
11649 case DW_TAG_enumerator
:
11650 return "DW_TAG_enumerator";
11651 case DW_TAG_file_type
:
11652 return "DW_TAG_file_type";
11653 case DW_TAG_friend
:
11654 return "DW_TAG_friend";
11655 case DW_TAG_namelist
:
11656 return "DW_TAG_namelist";
11657 case DW_TAG_namelist_item
:
11658 return "DW_TAG_namelist_item";
11659 case DW_TAG_packed_type
:
11660 return "DW_TAG_packed_type";
11661 case DW_TAG_subprogram
:
11662 return "DW_TAG_subprogram";
11663 case DW_TAG_template_type_param
:
11664 return "DW_TAG_template_type_param";
11665 case DW_TAG_template_value_param
:
11666 return "DW_TAG_template_value_param";
11667 case DW_TAG_thrown_type
:
11668 return "DW_TAG_thrown_type";
11669 case DW_TAG_try_block
:
11670 return "DW_TAG_try_block";
11671 case DW_TAG_variant_part
:
11672 return "DW_TAG_variant_part";
11673 case DW_TAG_variable
:
11674 return "DW_TAG_variable";
11675 case DW_TAG_volatile_type
:
11676 return "DW_TAG_volatile_type";
11677 case DW_TAG_dwarf_procedure
:
11678 return "DW_TAG_dwarf_procedure";
11679 case DW_TAG_restrict_type
:
11680 return "DW_TAG_restrict_type";
11681 case DW_TAG_interface_type
:
11682 return "DW_TAG_interface_type";
11683 case DW_TAG_namespace
:
11684 return "DW_TAG_namespace";
11685 case DW_TAG_imported_module
:
11686 return "DW_TAG_imported_module";
11687 case DW_TAG_unspecified_type
:
11688 return "DW_TAG_unspecified_type";
11689 case DW_TAG_partial_unit
:
11690 return "DW_TAG_partial_unit";
11691 case DW_TAG_imported_unit
:
11692 return "DW_TAG_imported_unit";
11693 case DW_TAG_condition
:
11694 return "DW_TAG_condition";
11695 case DW_TAG_shared_type
:
11696 return "DW_TAG_shared_type";
11697 case DW_TAG_type_unit
:
11698 return "DW_TAG_type_unit";
11699 case DW_TAG_MIPS_loop
:
11700 return "DW_TAG_MIPS_loop";
11701 case DW_TAG_HP_array_descriptor
:
11702 return "DW_TAG_HP_array_descriptor";
11703 case DW_TAG_format_label
:
11704 return "DW_TAG_format_label";
11705 case DW_TAG_function_template
:
11706 return "DW_TAG_function_template";
11707 case DW_TAG_class_template
:
11708 return "DW_TAG_class_template";
11709 case DW_TAG_GNU_BINCL
:
11710 return "DW_TAG_GNU_BINCL";
11711 case DW_TAG_GNU_EINCL
:
11712 return "DW_TAG_GNU_EINCL";
11713 case DW_TAG_upc_shared_type
:
11714 return "DW_TAG_upc_shared_type";
11715 case DW_TAG_upc_strict_type
:
11716 return "DW_TAG_upc_strict_type";
11717 case DW_TAG_upc_relaxed_type
:
11718 return "DW_TAG_upc_relaxed_type";
11719 case DW_TAG_PGI_kanji_type
:
11720 return "DW_TAG_PGI_kanji_type";
11721 case DW_TAG_PGI_interface_block
:
11722 return "DW_TAG_PGI_interface_block";
11724 return "DW_TAG_<unknown>";
11728 /* Convert a DWARF attribute code into its string name. */
11731 dwarf_attr_name (unsigned attr
)
11735 case DW_AT_sibling
:
11736 return "DW_AT_sibling";
11737 case DW_AT_location
:
11738 return "DW_AT_location";
11740 return "DW_AT_name";
11741 case DW_AT_ordering
:
11742 return "DW_AT_ordering";
11743 case DW_AT_subscr_data
:
11744 return "DW_AT_subscr_data";
11745 case DW_AT_byte_size
:
11746 return "DW_AT_byte_size";
11747 case DW_AT_bit_offset
:
11748 return "DW_AT_bit_offset";
11749 case DW_AT_bit_size
:
11750 return "DW_AT_bit_size";
11751 case DW_AT_element_list
:
11752 return "DW_AT_element_list";
11753 case DW_AT_stmt_list
:
11754 return "DW_AT_stmt_list";
11756 return "DW_AT_low_pc";
11757 case DW_AT_high_pc
:
11758 return "DW_AT_high_pc";
11759 case DW_AT_language
:
11760 return "DW_AT_language";
11762 return "DW_AT_member";
11764 return "DW_AT_discr";
11765 case DW_AT_discr_value
:
11766 return "DW_AT_discr_value";
11767 case DW_AT_visibility
:
11768 return "DW_AT_visibility";
11770 return "DW_AT_import";
11771 case DW_AT_string_length
:
11772 return "DW_AT_string_length";
11773 case DW_AT_common_reference
:
11774 return "DW_AT_common_reference";
11775 case DW_AT_comp_dir
:
11776 return "DW_AT_comp_dir";
11777 case DW_AT_const_value
:
11778 return "DW_AT_const_value";
11779 case DW_AT_containing_type
:
11780 return "DW_AT_containing_type";
11781 case DW_AT_default_value
:
11782 return "DW_AT_default_value";
11784 return "DW_AT_inline";
11785 case DW_AT_is_optional
:
11786 return "DW_AT_is_optional";
11787 case DW_AT_lower_bound
:
11788 return "DW_AT_lower_bound";
11789 case DW_AT_producer
:
11790 return "DW_AT_producer";
11791 case DW_AT_prototyped
:
11792 return "DW_AT_prototyped";
11793 case DW_AT_return_addr
:
11794 return "DW_AT_return_addr";
11795 case DW_AT_start_scope
:
11796 return "DW_AT_start_scope";
11797 case DW_AT_bit_stride
:
11798 return "DW_AT_bit_stride";
11799 case DW_AT_upper_bound
:
11800 return "DW_AT_upper_bound";
11801 case DW_AT_abstract_origin
:
11802 return "DW_AT_abstract_origin";
11803 case DW_AT_accessibility
:
11804 return "DW_AT_accessibility";
11805 case DW_AT_address_class
:
11806 return "DW_AT_address_class";
11807 case DW_AT_artificial
:
11808 return "DW_AT_artificial";
11809 case DW_AT_base_types
:
11810 return "DW_AT_base_types";
11811 case DW_AT_calling_convention
:
11812 return "DW_AT_calling_convention";
11814 return "DW_AT_count";
11815 case DW_AT_data_member_location
:
11816 return "DW_AT_data_member_location";
11817 case DW_AT_decl_column
:
11818 return "DW_AT_decl_column";
11819 case DW_AT_decl_file
:
11820 return "DW_AT_decl_file";
11821 case DW_AT_decl_line
:
11822 return "DW_AT_decl_line";
11823 case DW_AT_declaration
:
11824 return "DW_AT_declaration";
11825 case DW_AT_discr_list
:
11826 return "DW_AT_discr_list";
11827 case DW_AT_encoding
:
11828 return "DW_AT_encoding";
11829 case DW_AT_external
:
11830 return "DW_AT_external";
11831 case DW_AT_frame_base
:
11832 return "DW_AT_frame_base";
11834 return "DW_AT_friend";
11835 case DW_AT_identifier_case
:
11836 return "DW_AT_identifier_case";
11837 case DW_AT_macro_info
:
11838 return "DW_AT_macro_info";
11839 case DW_AT_namelist_items
:
11840 return "DW_AT_namelist_items";
11841 case DW_AT_priority
:
11842 return "DW_AT_priority";
11843 case DW_AT_segment
:
11844 return "DW_AT_segment";
11845 case DW_AT_specification
:
11846 return "DW_AT_specification";
11847 case DW_AT_static_link
:
11848 return "DW_AT_static_link";
11850 return "DW_AT_type";
11851 case DW_AT_use_location
:
11852 return "DW_AT_use_location";
11853 case DW_AT_variable_parameter
:
11854 return "DW_AT_variable_parameter";
11855 case DW_AT_virtuality
:
11856 return "DW_AT_virtuality";
11857 case DW_AT_vtable_elem_location
:
11858 return "DW_AT_vtable_elem_location";
11859 /* DWARF 3 values. */
11860 case DW_AT_allocated
:
11861 return "DW_AT_allocated";
11862 case DW_AT_associated
:
11863 return "DW_AT_associated";
11864 case DW_AT_data_location
:
11865 return "DW_AT_data_location";
11866 case DW_AT_byte_stride
:
11867 return "DW_AT_byte_stride";
11868 case DW_AT_entry_pc
:
11869 return "DW_AT_entry_pc";
11870 case DW_AT_use_UTF8
:
11871 return "DW_AT_use_UTF8";
11872 case DW_AT_extension
:
11873 return "DW_AT_extension";
11875 return "DW_AT_ranges";
11876 case DW_AT_trampoline
:
11877 return "DW_AT_trampoline";
11878 case DW_AT_call_column
:
11879 return "DW_AT_call_column";
11880 case DW_AT_call_file
:
11881 return "DW_AT_call_file";
11882 case DW_AT_call_line
:
11883 return "DW_AT_call_line";
11884 case DW_AT_description
:
11885 return "DW_AT_description";
11886 case DW_AT_binary_scale
:
11887 return "DW_AT_binary_scale";
11888 case DW_AT_decimal_scale
:
11889 return "DW_AT_decimal_scale";
11891 return "DW_AT_small";
11892 case DW_AT_decimal_sign
:
11893 return "DW_AT_decimal_sign";
11894 case DW_AT_digit_count
:
11895 return "DW_AT_digit_count";
11896 case DW_AT_picture_string
:
11897 return "DW_AT_picture_string";
11898 case DW_AT_mutable
:
11899 return "DW_AT_mutable";
11900 case DW_AT_threads_scaled
:
11901 return "DW_AT_threads_scaled";
11902 case DW_AT_explicit
:
11903 return "DW_AT_explicit";
11904 case DW_AT_object_pointer
:
11905 return "DW_AT_object_pointer";
11906 case DW_AT_endianity
:
11907 return "DW_AT_endianity";
11908 case DW_AT_elemental
:
11909 return "DW_AT_elemental";
11911 return "DW_AT_pure";
11912 case DW_AT_recursive
:
11913 return "DW_AT_recursive";
11914 /* DWARF 4 values. */
11915 case DW_AT_signature
:
11916 return "DW_AT_signature";
11917 case DW_AT_linkage_name
:
11918 return "DW_AT_linkage_name";
11919 /* SGI/MIPS extensions. */
11920 #ifdef MIPS /* collides with DW_AT_HP_block_index */
11921 case DW_AT_MIPS_fde
:
11922 return "DW_AT_MIPS_fde";
11924 case DW_AT_MIPS_loop_begin
:
11925 return "DW_AT_MIPS_loop_begin";
11926 case DW_AT_MIPS_tail_loop_begin
:
11927 return "DW_AT_MIPS_tail_loop_begin";
11928 case DW_AT_MIPS_epilog_begin
:
11929 return "DW_AT_MIPS_epilog_begin";
11930 case DW_AT_MIPS_loop_unroll_factor
:
11931 return "DW_AT_MIPS_loop_unroll_factor";
11932 case DW_AT_MIPS_software_pipeline_depth
:
11933 return "DW_AT_MIPS_software_pipeline_depth";
11934 case DW_AT_MIPS_linkage_name
:
11935 return "DW_AT_MIPS_linkage_name";
11936 case DW_AT_MIPS_stride
:
11937 return "DW_AT_MIPS_stride";
11938 case DW_AT_MIPS_abstract_name
:
11939 return "DW_AT_MIPS_abstract_name";
11940 case DW_AT_MIPS_clone_origin
:
11941 return "DW_AT_MIPS_clone_origin";
11942 case DW_AT_MIPS_has_inlines
:
11943 return "DW_AT_MIPS_has_inlines";
11944 /* HP extensions. */
11945 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
11946 case DW_AT_HP_block_index
:
11947 return "DW_AT_HP_block_index";
11949 case DW_AT_HP_unmodifiable
:
11950 return "DW_AT_HP_unmodifiable";
11951 case DW_AT_HP_actuals_stmt_list
:
11952 return "DW_AT_HP_actuals_stmt_list";
11953 case DW_AT_HP_proc_per_section
:
11954 return "DW_AT_HP_proc_per_section";
11955 case DW_AT_HP_raw_data_ptr
:
11956 return "DW_AT_HP_raw_data_ptr";
11957 case DW_AT_HP_pass_by_reference
:
11958 return "DW_AT_HP_pass_by_reference";
11959 case DW_AT_HP_opt_level
:
11960 return "DW_AT_HP_opt_level";
11961 case DW_AT_HP_prof_version_id
:
11962 return "DW_AT_HP_prof_version_id";
11963 case DW_AT_HP_opt_flags
:
11964 return "DW_AT_HP_opt_flags";
11965 case DW_AT_HP_cold_region_low_pc
:
11966 return "DW_AT_HP_cold_region_low_pc";
11967 case DW_AT_HP_cold_region_high_pc
:
11968 return "DW_AT_HP_cold_region_high_pc";
11969 case DW_AT_HP_all_variables_modifiable
:
11970 return "DW_AT_HP_all_variables_modifiable";
11971 case DW_AT_HP_linkage_name
:
11972 return "DW_AT_HP_linkage_name";
11973 case DW_AT_HP_prof_flags
:
11974 return "DW_AT_HP_prof_flags";
11975 /* GNU extensions. */
11976 case DW_AT_sf_names
:
11977 return "DW_AT_sf_names";
11978 case DW_AT_src_info
:
11979 return "DW_AT_src_info";
11980 case DW_AT_mac_info
:
11981 return "DW_AT_mac_info";
11982 case DW_AT_src_coords
:
11983 return "DW_AT_src_coords";
11984 case DW_AT_body_begin
:
11985 return "DW_AT_body_begin";
11986 case DW_AT_body_end
:
11987 return "DW_AT_body_end";
11988 case DW_AT_GNU_vector
:
11989 return "DW_AT_GNU_vector";
11990 case DW_AT_GNU_odr_signature
:
11991 return "DW_AT_GNU_odr_signature";
11992 /* VMS extensions. */
11993 case DW_AT_VMS_rtnbeg_pd_address
:
11994 return "DW_AT_VMS_rtnbeg_pd_address";
11995 /* UPC extension. */
11996 case DW_AT_upc_threads_scaled
:
11997 return "DW_AT_upc_threads_scaled";
11998 /* PGI (STMicroelectronics) extensions. */
11999 case DW_AT_PGI_lbase
:
12000 return "DW_AT_PGI_lbase";
12001 case DW_AT_PGI_soffset
:
12002 return "DW_AT_PGI_soffset";
12003 case DW_AT_PGI_lstride
:
12004 return "DW_AT_PGI_lstride";
12006 return "DW_AT_<unknown>";
12010 /* Convert a DWARF value form code into its string name. */
12013 dwarf_form_name (unsigned form
)
12018 return "DW_FORM_addr";
12019 case DW_FORM_block2
:
12020 return "DW_FORM_block2";
12021 case DW_FORM_block4
:
12022 return "DW_FORM_block4";
12023 case DW_FORM_data2
:
12024 return "DW_FORM_data2";
12025 case DW_FORM_data4
:
12026 return "DW_FORM_data4";
12027 case DW_FORM_data8
:
12028 return "DW_FORM_data8";
12029 case DW_FORM_string
:
12030 return "DW_FORM_string";
12031 case DW_FORM_block
:
12032 return "DW_FORM_block";
12033 case DW_FORM_block1
:
12034 return "DW_FORM_block1";
12035 case DW_FORM_data1
:
12036 return "DW_FORM_data1";
12038 return "DW_FORM_flag";
12039 case DW_FORM_sdata
:
12040 return "DW_FORM_sdata";
12042 return "DW_FORM_strp";
12043 case DW_FORM_udata
:
12044 return "DW_FORM_udata";
12045 case DW_FORM_ref_addr
:
12046 return "DW_FORM_ref_addr";
12048 return "DW_FORM_ref1";
12050 return "DW_FORM_ref2";
12052 return "DW_FORM_ref4";
12054 return "DW_FORM_ref8";
12055 case DW_FORM_ref_udata
:
12056 return "DW_FORM_ref_udata";
12057 case DW_FORM_indirect
:
12058 return "DW_FORM_indirect";
12059 case DW_FORM_sec_offset
:
12060 return "DW_FORM_sec_offset";
12061 case DW_FORM_exprloc
:
12062 return "DW_FORM_exprloc";
12063 case DW_FORM_flag_present
:
12064 return "DW_FORM_flag_present";
12066 return "DW_FORM_sig8";
12068 return "DW_FORM_<unknown>";
12072 /* Convert a DWARF stack opcode into its string name. */
12075 dwarf_stack_op_name (unsigned op
, int def
)
12080 return "DW_OP_addr";
12082 return "DW_OP_deref";
12083 case DW_OP_const1u
:
12084 return "DW_OP_const1u";
12085 case DW_OP_const1s
:
12086 return "DW_OP_const1s";
12087 case DW_OP_const2u
:
12088 return "DW_OP_const2u";
12089 case DW_OP_const2s
:
12090 return "DW_OP_const2s";
12091 case DW_OP_const4u
:
12092 return "DW_OP_const4u";
12093 case DW_OP_const4s
:
12094 return "DW_OP_const4s";
12095 case DW_OP_const8u
:
12096 return "DW_OP_const8u";
12097 case DW_OP_const8s
:
12098 return "DW_OP_const8s";
12100 return "DW_OP_constu";
12102 return "DW_OP_consts";
12104 return "DW_OP_dup";
12106 return "DW_OP_drop";
12108 return "DW_OP_over";
12110 return "DW_OP_pick";
12112 return "DW_OP_swap";
12114 return "DW_OP_rot";
12116 return "DW_OP_xderef";
12118 return "DW_OP_abs";
12120 return "DW_OP_and";
12122 return "DW_OP_div";
12124 return "DW_OP_minus";
12126 return "DW_OP_mod";
12128 return "DW_OP_mul";
12130 return "DW_OP_neg";
12132 return "DW_OP_not";
12136 return "DW_OP_plus";
12137 case DW_OP_plus_uconst
:
12138 return "DW_OP_plus_uconst";
12140 return "DW_OP_shl";
12142 return "DW_OP_shr";
12144 return "DW_OP_shra";
12146 return "DW_OP_xor";
12148 return "DW_OP_bra";
12162 return "DW_OP_skip";
12164 return "DW_OP_lit0";
12166 return "DW_OP_lit1";
12168 return "DW_OP_lit2";
12170 return "DW_OP_lit3";
12172 return "DW_OP_lit4";
12174 return "DW_OP_lit5";
12176 return "DW_OP_lit6";
12178 return "DW_OP_lit7";
12180 return "DW_OP_lit8";
12182 return "DW_OP_lit9";
12184 return "DW_OP_lit10";
12186 return "DW_OP_lit11";
12188 return "DW_OP_lit12";
12190 return "DW_OP_lit13";
12192 return "DW_OP_lit14";
12194 return "DW_OP_lit15";
12196 return "DW_OP_lit16";
12198 return "DW_OP_lit17";
12200 return "DW_OP_lit18";
12202 return "DW_OP_lit19";
12204 return "DW_OP_lit20";
12206 return "DW_OP_lit21";
12208 return "DW_OP_lit22";
12210 return "DW_OP_lit23";
12212 return "DW_OP_lit24";
12214 return "DW_OP_lit25";
12216 return "DW_OP_lit26";
12218 return "DW_OP_lit27";
12220 return "DW_OP_lit28";
12222 return "DW_OP_lit29";
12224 return "DW_OP_lit30";
12226 return "DW_OP_lit31";
12228 return "DW_OP_reg0";
12230 return "DW_OP_reg1";
12232 return "DW_OP_reg2";
12234 return "DW_OP_reg3";
12236 return "DW_OP_reg4";
12238 return "DW_OP_reg5";
12240 return "DW_OP_reg6";
12242 return "DW_OP_reg7";
12244 return "DW_OP_reg8";
12246 return "DW_OP_reg9";
12248 return "DW_OP_reg10";
12250 return "DW_OP_reg11";
12252 return "DW_OP_reg12";
12254 return "DW_OP_reg13";
12256 return "DW_OP_reg14";
12258 return "DW_OP_reg15";
12260 return "DW_OP_reg16";
12262 return "DW_OP_reg17";
12264 return "DW_OP_reg18";
12266 return "DW_OP_reg19";
12268 return "DW_OP_reg20";
12270 return "DW_OP_reg21";
12272 return "DW_OP_reg22";
12274 return "DW_OP_reg23";
12276 return "DW_OP_reg24";
12278 return "DW_OP_reg25";
12280 return "DW_OP_reg26";
12282 return "DW_OP_reg27";
12284 return "DW_OP_reg28";
12286 return "DW_OP_reg29";
12288 return "DW_OP_reg30";
12290 return "DW_OP_reg31";
12292 return "DW_OP_breg0";
12294 return "DW_OP_breg1";
12296 return "DW_OP_breg2";
12298 return "DW_OP_breg3";
12300 return "DW_OP_breg4";
12302 return "DW_OP_breg5";
12304 return "DW_OP_breg6";
12306 return "DW_OP_breg7";
12308 return "DW_OP_breg8";
12310 return "DW_OP_breg9";
12312 return "DW_OP_breg10";
12314 return "DW_OP_breg11";
12316 return "DW_OP_breg12";
12318 return "DW_OP_breg13";
12320 return "DW_OP_breg14";
12322 return "DW_OP_breg15";
12324 return "DW_OP_breg16";
12326 return "DW_OP_breg17";
12328 return "DW_OP_breg18";
12330 return "DW_OP_breg19";
12332 return "DW_OP_breg20";
12334 return "DW_OP_breg21";
12336 return "DW_OP_breg22";
12338 return "DW_OP_breg23";
12340 return "DW_OP_breg24";
12342 return "DW_OP_breg25";
12344 return "DW_OP_breg26";
12346 return "DW_OP_breg27";
12348 return "DW_OP_breg28";
12350 return "DW_OP_breg29";
12352 return "DW_OP_breg30";
12354 return "DW_OP_breg31";
12356 return "DW_OP_regx";
12358 return "DW_OP_fbreg";
12360 return "DW_OP_bregx";
12362 return "DW_OP_piece";
12363 case DW_OP_deref_size
:
12364 return "DW_OP_deref_size";
12365 case DW_OP_xderef_size
:
12366 return "DW_OP_xderef_size";
12368 return "DW_OP_nop";
12369 /* DWARF 3 extensions. */
12370 case DW_OP_push_object_address
:
12371 return "DW_OP_push_object_address";
12373 return "DW_OP_call2";
12375 return "DW_OP_call4";
12376 case DW_OP_call_ref
:
12377 return "DW_OP_call_ref";
12378 case DW_OP_form_tls_address
:
12379 return "DW_OP_form_tls_address";
12380 case DW_OP_call_frame_cfa
:
12381 return "DW_OP_call_frame_cfa";
12382 case DW_OP_bit_piece
:
12383 return "DW_OP_bit_piece";
12384 /* DWARF 4 extensions. */
12385 case DW_OP_implicit_value
:
12386 return "DW_OP_implicit_value";
12387 case DW_OP_stack_value
:
12388 return "DW_OP_stack_value";
12389 /* GNU extensions. */
12390 case DW_OP_GNU_push_tls_address
:
12391 return "DW_OP_GNU_push_tls_address";
12392 case DW_OP_GNU_uninit
:
12393 return "DW_OP_GNU_uninit";
12395 return def
? "OP_<unknown>" : NULL
;
12400 dwarf_bool_name (unsigned mybool
)
12408 /* Convert a DWARF type code into its string name. */
12411 dwarf_type_encoding_name (unsigned enc
)
12416 return "DW_ATE_void";
12417 case DW_ATE_address
:
12418 return "DW_ATE_address";
12419 case DW_ATE_boolean
:
12420 return "DW_ATE_boolean";
12421 case DW_ATE_complex_float
:
12422 return "DW_ATE_complex_float";
12424 return "DW_ATE_float";
12425 case DW_ATE_signed
:
12426 return "DW_ATE_signed";
12427 case DW_ATE_signed_char
:
12428 return "DW_ATE_signed_char";
12429 case DW_ATE_unsigned
:
12430 return "DW_ATE_unsigned";
12431 case DW_ATE_unsigned_char
:
12432 return "DW_ATE_unsigned_char";
12434 case DW_ATE_imaginary_float
:
12435 return "DW_ATE_imaginary_float";
12436 case DW_ATE_packed_decimal
:
12437 return "DW_ATE_packed_decimal";
12438 case DW_ATE_numeric_string
:
12439 return "DW_ATE_numeric_string";
12440 case DW_ATE_edited
:
12441 return "DW_ATE_edited";
12442 case DW_ATE_signed_fixed
:
12443 return "DW_ATE_signed_fixed";
12444 case DW_ATE_unsigned_fixed
:
12445 return "DW_ATE_unsigned_fixed";
12446 case DW_ATE_decimal_float
:
12447 return "DW_ATE_decimal_float";
12450 return "DW_ATE_UTF";
12451 /* HP extensions. */
12452 case DW_ATE_HP_float80
:
12453 return "DW_ATE_HP_float80";
12454 case DW_ATE_HP_complex_float80
:
12455 return "DW_ATE_HP_complex_float80";
12456 case DW_ATE_HP_float128
:
12457 return "DW_ATE_HP_float128";
12458 case DW_ATE_HP_complex_float128
:
12459 return "DW_ATE_HP_complex_float128";
12460 case DW_ATE_HP_floathpintel
:
12461 return "DW_ATE_HP_floathpintel";
12462 case DW_ATE_HP_imaginary_float80
:
12463 return "DW_ATE_HP_imaginary_float80";
12464 case DW_ATE_HP_imaginary_float128
:
12465 return "DW_ATE_HP_imaginary_float128";
12467 return "DW_ATE_<unknown>";
12471 /* Convert a DWARF call frame info operation to its string name. */
12475 dwarf_cfi_name (unsigned cfi_opc
)
12479 case DW_CFA_advance_loc
:
12480 return "DW_CFA_advance_loc";
12481 case DW_CFA_offset
:
12482 return "DW_CFA_offset";
12483 case DW_CFA_restore
:
12484 return "DW_CFA_restore";
12486 return "DW_CFA_nop";
12487 case DW_CFA_set_loc
:
12488 return "DW_CFA_set_loc";
12489 case DW_CFA_advance_loc1
:
12490 return "DW_CFA_advance_loc1";
12491 case DW_CFA_advance_loc2
:
12492 return "DW_CFA_advance_loc2";
12493 case DW_CFA_advance_loc4
:
12494 return "DW_CFA_advance_loc4";
12495 case DW_CFA_offset_extended
:
12496 return "DW_CFA_offset_extended";
12497 case DW_CFA_restore_extended
:
12498 return "DW_CFA_restore_extended";
12499 case DW_CFA_undefined
:
12500 return "DW_CFA_undefined";
12501 case DW_CFA_same_value
:
12502 return "DW_CFA_same_value";
12503 case DW_CFA_register
:
12504 return "DW_CFA_register";
12505 case DW_CFA_remember_state
:
12506 return "DW_CFA_remember_state";
12507 case DW_CFA_restore_state
:
12508 return "DW_CFA_restore_state";
12509 case DW_CFA_def_cfa
:
12510 return "DW_CFA_def_cfa";
12511 case DW_CFA_def_cfa_register
:
12512 return "DW_CFA_def_cfa_register";
12513 case DW_CFA_def_cfa_offset
:
12514 return "DW_CFA_def_cfa_offset";
12516 case DW_CFA_def_cfa_expression
:
12517 return "DW_CFA_def_cfa_expression";
12518 case DW_CFA_expression
:
12519 return "DW_CFA_expression";
12520 case DW_CFA_offset_extended_sf
:
12521 return "DW_CFA_offset_extended_sf";
12522 case DW_CFA_def_cfa_sf
:
12523 return "DW_CFA_def_cfa_sf";
12524 case DW_CFA_def_cfa_offset_sf
:
12525 return "DW_CFA_def_cfa_offset_sf";
12526 case DW_CFA_val_offset
:
12527 return "DW_CFA_val_offset";
12528 case DW_CFA_val_offset_sf
:
12529 return "DW_CFA_val_offset_sf";
12530 case DW_CFA_val_expression
:
12531 return "DW_CFA_val_expression";
12532 /* SGI/MIPS specific. */
12533 case DW_CFA_MIPS_advance_loc8
:
12534 return "DW_CFA_MIPS_advance_loc8";
12535 /* GNU extensions. */
12536 case DW_CFA_GNU_window_save
:
12537 return "DW_CFA_GNU_window_save";
12538 case DW_CFA_GNU_args_size
:
12539 return "DW_CFA_GNU_args_size";
12540 case DW_CFA_GNU_negative_offset_extended
:
12541 return "DW_CFA_GNU_negative_offset_extended";
12543 return "DW_CFA_<unknown>";
12549 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
12553 print_spaces (indent
, f
);
12554 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
12555 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
12557 if (die
->parent
!= NULL
)
12559 print_spaces (indent
, f
);
12560 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
12561 die
->parent
->offset
);
12564 print_spaces (indent
, f
);
12565 fprintf_unfiltered (f
, " has children: %s\n",
12566 dwarf_bool_name (die
->child
!= NULL
));
12568 print_spaces (indent
, f
);
12569 fprintf_unfiltered (f
, " attributes:\n");
12571 for (i
= 0; i
< die
->num_attrs
; ++i
)
12573 print_spaces (indent
, f
);
12574 fprintf_unfiltered (f
, " %s (%s) ",
12575 dwarf_attr_name (die
->attrs
[i
].name
),
12576 dwarf_form_name (die
->attrs
[i
].form
));
12578 switch (die
->attrs
[i
].form
)
12580 case DW_FORM_ref_addr
:
12582 fprintf_unfiltered (f
, "address: ");
12583 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
12585 case DW_FORM_block2
:
12586 case DW_FORM_block4
:
12587 case DW_FORM_block
:
12588 case DW_FORM_block1
:
12589 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
12591 case DW_FORM_exprloc
:
12592 fprintf_unfiltered (f
, "expression: size %u",
12593 DW_BLOCK (&die
->attrs
[i
])->size
);
12598 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
12599 (long) (DW_ADDR (&die
->attrs
[i
])));
12601 case DW_FORM_data1
:
12602 case DW_FORM_data2
:
12603 case DW_FORM_data4
:
12604 case DW_FORM_data8
:
12605 case DW_FORM_udata
:
12606 case DW_FORM_sdata
:
12607 fprintf_unfiltered (f
, "constant: %s",
12608 pulongest (DW_UNSND (&die
->attrs
[i
])));
12610 case DW_FORM_sec_offset
:
12611 fprintf_unfiltered (f
, "section offset: %s",
12612 pulongest (DW_UNSND (&die
->attrs
[i
])));
12615 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
12616 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
12617 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
12619 fprintf_unfiltered (f
, "signatured type, offset: unknown");
12621 case DW_FORM_string
:
12623 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
12624 DW_STRING (&die
->attrs
[i
])
12625 ? DW_STRING (&die
->attrs
[i
]) : "",
12626 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
12629 if (DW_UNSND (&die
->attrs
[i
]))
12630 fprintf_unfiltered (f
, "flag: TRUE");
12632 fprintf_unfiltered (f
, "flag: FALSE");
12634 case DW_FORM_flag_present
:
12635 fprintf_unfiltered (f
, "flag: TRUE");
12637 case DW_FORM_indirect
:
12638 /* the reader will have reduced the indirect form to
12639 the "base form" so this form should not occur */
12640 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
12643 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
12644 die
->attrs
[i
].form
);
12647 fprintf_unfiltered (f
, "\n");
12652 dump_die_for_error (struct die_info
*die
)
12654 dump_die_shallow (gdb_stderr
, 0, die
);
12658 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
12660 int indent
= level
* 4;
12662 gdb_assert (die
!= NULL
);
12664 if (level
>= max_level
)
12667 dump_die_shallow (f
, indent
, die
);
12669 if (die
->child
!= NULL
)
12671 print_spaces (indent
, f
);
12672 fprintf_unfiltered (f
, " Children:");
12673 if (level
+ 1 < max_level
)
12675 fprintf_unfiltered (f
, "\n");
12676 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
12680 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
12684 if (die
->sibling
!= NULL
&& level
> 0)
12686 dump_die_1 (f
, level
, max_level
, die
->sibling
);
12690 /* This is called from the pdie macro in gdbinit.in.
12691 It's not static so gcc will keep a copy callable from gdb. */
12694 dump_die (struct die_info
*die
, int max_level
)
12696 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
12700 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
12704 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
12710 is_ref_attr (struct attribute
*attr
)
12712 switch (attr
->form
)
12714 case DW_FORM_ref_addr
:
12719 case DW_FORM_ref_udata
:
12726 static unsigned int
12727 dwarf2_get_ref_die_offset (struct attribute
*attr
)
12729 if (is_ref_attr (attr
))
12730 return DW_ADDR (attr
);
12732 complaint (&symfile_complaints
,
12733 _("unsupported die ref attribute form: '%s'"),
12734 dwarf_form_name (attr
->form
));
12738 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
12739 * the value held by the attribute is not constant. */
12742 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
12744 if (attr
->form
== DW_FORM_sdata
)
12745 return DW_SND (attr
);
12746 else if (attr
->form
== DW_FORM_udata
12747 || attr
->form
== DW_FORM_data1
12748 || attr
->form
== DW_FORM_data2
12749 || attr
->form
== DW_FORM_data4
12750 || attr
->form
== DW_FORM_data8
)
12751 return DW_UNSND (attr
);
12754 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
12755 dwarf_form_name (attr
->form
));
12756 return default_value
;
12760 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
12761 unit and add it to our queue.
12762 The result is non-zero if PER_CU was queued, otherwise the result is zero
12763 meaning either PER_CU is already queued or it is already loaded. */
12766 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
12767 struct dwarf2_per_cu_data
*per_cu
)
12769 /* We may arrive here during partial symbol reading, if we need full
12770 DIEs to process an unusual case (e.g. template arguments). Do
12771 not queue PER_CU, just tell our caller to load its DIEs. */
12772 if (dwarf2_per_objfile
->reading_partial_symbols
)
12774 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
12779 /* Mark the dependence relation so that we don't flush PER_CU
12781 dwarf2_add_dependence (this_cu
, per_cu
);
12783 /* If it's already on the queue, we have nothing to do. */
12784 if (per_cu
->queued
)
12787 /* If the compilation unit is already loaded, just mark it as
12789 if (per_cu
->cu
!= NULL
)
12791 per_cu
->cu
->last_used
= 0;
12795 /* Add it to the queue. */
12796 queue_comp_unit (per_cu
, this_cu
->objfile
);
12801 /* Follow reference or signature attribute ATTR of SRC_DIE.
12802 On entry *REF_CU is the CU of SRC_DIE.
12803 On exit *REF_CU is the CU of the result. */
12805 static struct die_info
*
12806 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
12807 struct dwarf2_cu
**ref_cu
)
12809 struct die_info
*die
;
12811 if (is_ref_attr (attr
))
12812 die
= follow_die_ref (src_die
, attr
, ref_cu
);
12813 else if (attr
->form
== DW_FORM_sig8
)
12814 die
= follow_die_sig (src_die
, attr
, ref_cu
);
12817 dump_die_for_error (src_die
);
12818 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
12819 (*ref_cu
)->objfile
->name
);
12825 /* Follow reference OFFSET.
12826 On entry *REF_CU is the CU of the source die referencing OFFSET.
12827 On exit *REF_CU is the CU of the result.
12828 Returns NULL if OFFSET is invalid. */
12830 static struct die_info
*
12831 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
12833 struct die_info temp_die
;
12834 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
12836 gdb_assert (cu
->per_cu
!= NULL
);
12840 if (cu
->per_cu
->from_debug_types
)
12842 /* .debug_types CUs cannot reference anything outside their CU.
12843 If they need to, they have to reference a signatured type via
12845 if (! offset_in_cu_p (&cu
->header
, offset
))
12848 else if (! offset_in_cu_p (&cu
->header
, offset
))
12850 struct dwarf2_per_cu_data
*per_cu
;
12852 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
12854 /* If necessary, add it to the queue and load its DIEs. */
12855 if (maybe_queue_comp_unit (cu
, per_cu
))
12856 load_full_comp_unit (per_cu
, cu
->objfile
);
12858 target_cu
= per_cu
->cu
;
12860 else if (cu
->dies
== NULL
)
12862 /* We're loading full DIEs during partial symbol reading. */
12863 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
12864 load_full_comp_unit (cu
->per_cu
, cu
->objfile
);
12867 *ref_cu
= target_cu
;
12868 temp_die
.offset
= offset
;
12869 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
12872 /* Follow reference attribute ATTR of SRC_DIE.
12873 On entry *REF_CU is the CU of SRC_DIE.
12874 On exit *REF_CU is the CU of the result. */
12876 static struct die_info
*
12877 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
12878 struct dwarf2_cu
**ref_cu
)
12880 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
12881 struct dwarf2_cu
*cu
= *ref_cu
;
12882 struct die_info
*die
;
12884 die
= follow_die_offset (offset
, ref_cu
);
12886 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
12887 "at 0x%x [in module %s]"),
12888 offset
, src_die
->offset
, cu
->objfile
->name
);
12893 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
12894 value is intended for DW_OP_call*. */
12896 struct dwarf2_locexpr_baton
12897 dwarf2_fetch_die_location_block (unsigned int offset
,
12898 struct dwarf2_per_cu_data
*per_cu
)
12900 struct dwarf2_cu
*cu
= per_cu
->cu
;
12901 struct die_info
*die
;
12902 struct attribute
*attr
;
12903 struct dwarf2_locexpr_baton retval
;
12905 die
= follow_die_offset (offset
, &cu
);
12907 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
12908 offset
, per_cu
->cu
->objfile
->name
);
12910 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
12913 /* DWARF: "If there is no such attribute, then there is no effect.". */
12915 retval
.data
= NULL
;
12920 if (!attr_form_is_block (attr
))
12921 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
12922 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
12923 offset
, per_cu
->cu
->objfile
->name
);
12925 retval
.data
= DW_BLOCK (attr
)->data
;
12926 retval
.size
= DW_BLOCK (attr
)->size
;
12928 retval
.per_cu
= cu
->per_cu
;
12932 /* Follow the signature attribute ATTR in SRC_DIE.
12933 On entry *REF_CU is the CU of SRC_DIE.
12934 On exit *REF_CU is the CU of the result. */
12936 static struct die_info
*
12937 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
12938 struct dwarf2_cu
**ref_cu
)
12940 struct objfile
*objfile
= (*ref_cu
)->objfile
;
12941 struct die_info temp_die
;
12942 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
12943 struct dwarf2_cu
*sig_cu
;
12944 struct die_info
*die
;
12946 /* sig_type will be NULL if the signatured type is missing from
12948 if (sig_type
== NULL
)
12949 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
12950 "at 0x%x [in module %s]"),
12951 src_die
->offset
, objfile
->name
);
12953 /* If necessary, add it to the queue and load its DIEs. */
12955 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
12956 read_signatured_type (objfile
, sig_type
);
12958 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
12960 sig_cu
= sig_type
->per_cu
.cu
;
12961 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
12962 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
12969 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
12970 "at 0x%x [in module %s]"),
12971 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
12974 /* Given an offset of a signatured type, return its signatured_type. */
12976 static struct signatured_type
*
12977 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
12979 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
12980 unsigned int length
, initial_length_size
;
12981 unsigned int sig_offset
;
12982 struct signatured_type find_entry
, *type_sig
;
12984 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
12985 sig_offset
= (initial_length_size
12987 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
12988 + 1 /*address_size*/);
12989 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
12990 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
12992 /* This is only used to lookup previously recorded types.
12993 If we didn't find it, it's our bug. */
12994 gdb_assert (type_sig
!= NULL
);
12995 gdb_assert (offset
== type_sig
->offset
);
13000 /* Read in signatured type at OFFSET and build its CU and die(s). */
13003 read_signatured_type_at_offset (struct objfile
*objfile
,
13004 unsigned int offset
)
13006 struct signatured_type
*type_sig
;
13008 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13010 /* We have the section offset, but we need the signature to do the
13011 hash table lookup. */
13012 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
13014 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13016 read_signatured_type (objfile
, type_sig
);
13018 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
13021 /* Read in a signatured type and build its CU and DIEs. */
13024 read_signatured_type (struct objfile
*objfile
,
13025 struct signatured_type
*type_sig
)
13027 gdb_byte
*types_ptr
;
13028 struct die_reader_specs reader_specs
;
13029 struct dwarf2_cu
*cu
;
13030 ULONGEST signature
;
13031 struct cleanup
*back_to
, *free_cu_cleanup
;
13032 struct attribute
*attr
;
13034 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
13035 types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
13037 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
13039 cu
= xmalloc (sizeof (struct dwarf2_cu
));
13040 memset (cu
, 0, sizeof (struct dwarf2_cu
));
13041 obstack_init (&cu
->comp_unit_obstack
);
13042 cu
->objfile
= objfile
;
13043 type_sig
->per_cu
.cu
= cu
;
13044 cu
->per_cu
= &type_sig
->per_cu
;
13046 /* If an error occurs while loading, release our storage. */
13047 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
13049 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
13050 types_ptr
, objfile
->obfd
);
13051 gdb_assert (signature
== type_sig
->signature
);
13054 = htab_create_alloc_ex (cu
->header
.length
/ 12,
13058 &cu
->comp_unit_obstack
,
13059 hashtab_obstack_allocate
,
13060 dummy_obstack_deallocate
);
13062 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
13063 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
13065 init_cu_die_reader (&reader_specs
, cu
);
13067 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
13070 /* We try not to read any attributes in this function, because not
13071 all objfiles needed for references have been loaded yet, and symbol
13072 table processing isn't initialized. But we have to set the CU language,
13073 or we won't be able to build types correctly. */
13074 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
13076 set_cu_language (DW_UNSND (attr
), cu
);
13078 set_cu_language (language_minimal
, cu
);
13080 do_cleanups (back_to
);
13082 /* We've successfully allocated this compilation unit. Let our caller
13083 clean it up when finished with it. */
13084 discard_cleanups (free_cu_cleanup
);
13086 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
13087 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
13090 /* Decode simple location descriptions.
13091 Given a pointer to a dwarf block that defines a location, compute
13092 the location and return the value.
13094 NOTE drow/2003-11-18: This function is called in two situations
13095 now: for the address of static or global variables (partial symbols
13096 only) and for offsets into structures which are expected to be
13097 (more or less) constant. The partial symbol case should go away,
13098 and only the constant case should remain. That will let this
13099 function complain more accurately. A few special modes are allowed
13100 without complaint for global variables (for instance, global
13101 register values and thread-local values).
13103 A location description containing no operations indicates that the
13104 object is optimized out. The return value is 0 for that case.
13105 FIXME drow/2003-11-16: No callers check for this case any more; soon all
13106 callers will only want a very basic result and this can become a
13109 Note that stack[0] is unused except as a default error return.
13110 Note that stack overflow is not yet handled. */
13113 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
13115 struct objfile
*objfile
= cu
->objfile
;
13117 int size
= blk
->size
;
13118 gdb_byte
*data
= blk
->data
;
13119 CORE_ADDR stack
[64];
13121 unsigned int bytes_read
, unsnd
;
13165 stack
[++stacki
] = op
- DW_OP_lit0
;
13200 stack
[++stacki
] = op
- DW_OP_reg0
;
13202 dwarf2_complex_location_expr_complaint ();
13206 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13208 stack
[++stacki
] = unsnd
;
13210 dwarf2_complex_location_expr_complaint ();
13214 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
13219 case DW_OP_const1u
:
13220 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
13224 case DW_OP_const1s
:
13225 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
13229 case DW_OP_const2u
:
13230 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
13234 case DW_OP_const2s
:
13235 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
13239 case DW_OP_const4u
:
13240 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
13244 case DW_OP_const4s
:
13245 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
13250 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
13256 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
13261 stack
[stacki
+ 1] = stack
[stacki
];
13266 stack
[stacki
- 1] += stack
[stacki
];
13270 case DW_OP_plus_uconst
:
13271 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
13276 stack
[stacki
- 1] -= stack
[stacki
];
13281 /* If we're not the last op, then we definitely can't encode
13282 this using GDB's address_class enum. This is valid for partial
13283 global symbols, although the variable's address will be bogus
13286 dwarf2_complex_location_expr_complaint ();
13289 case DW_OP_GNU_push_tls_address
:
13290 /* The top of the stack has the offset from the beginning
13291 of the thread control block at which the variable is located. */
13292 /* Nothing should follow this operator, so the top of stack would
13294 /* This is valid for partial global symbols, but the variable's
13295 address will be bogus in the psymtab. */
13297 dwarf2_complex_location_expr_complaint ();
13300 case DW_OP_GNU_uninit
:
13304 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
13305 dwarf_stack_op_name (op
, 1));
13306 return (stack
[stacki
]);
13309 return (stack
[stacki
]);
13312 /* memory allocation interface */
13314 static struct dwarf_block
*
13315 dwarf_alloc_block (struct dwarf2_cu
*cu
)
13317 struct dwarf_block
*blk
;
13319 blk
= (struct dwarf_block
*)
13320 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
13324 static struct abbrev_info
*
13325 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
13327 struct abbrev_info
*abbrev
;
13329 abbrev
= (struct abbrev_info
*)
13330 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
13331 memset (abbrev
, 0, sizeof (struct abbrev_info
));
13335 static struct die_info
*
13336 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
13338 struct die_info
*die
;
13339 size_t size
= sizeof (struct die_info
);
13342 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
13344 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
13345 memset (die
, 0, sizeof (struct die_info
));
13350 /* Macro support. */
13353 /* Return the full name of file number I in *LH's file name table.
13354 Use COMP_DIR as the name of the current directory of the
13355 compilation. The result is allocated using xmalloc; the caller is
13356 responsible for freeing it. */
13358 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
13360 /* Is the file number a valid index into the line header's file name
13361 table? Remember that file numbers start with one, not zero. */
13362 if (1 <= file
&& file
<= lh
->num_file_names
)
13364 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
13366 if (IS_ABSOLUTE_PATH (fe
->name
))
13367 return xstrdup (fe
->name
);
13375 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
13381 dir_len
= strlen (dir
);
13382 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
13383 strcpy (full_name
, dir
);
13384 full_name
[dir_len
] = '/';
13385 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
13389 return xstrdup (fe
->name
);
13394 /* The compiler produced a bogus file number. We can at least
13395 record the macro definitions made in the file, even if we
13396 won't be able to find the file by name. */
13397 char fake_name
[80];
13399 sprintf (fake_name
, "<bad macro file number %d>", file
);
13401 complaint (&symfile_complaints
,
13402 _("bad file number in macro information (%d)"),
13405 return xstrdup (fake_name
);
13410 static struct macro_source_file
*
13411 macro_start_file (int file
, int line
,
13412 struct macro_source_file
*current_file
,
13413 const char *comp_dir
,
13414 struct line_header
*lh
, struct objfile
*objfile
)
13416 /* The full name of this source file. */
13417 char *full_name
= file_full_name (file
, lh
, comp_dir
);
13419 /* We don't create a macro table for this compilation unit
13420 at all until we actually get a filename. */
13421 if (! pending_macros
)
13422 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
13423 objfile
->macro_cache
);
13425 if (! current_file
)
13426 /* If we have no current file, then this must be the start_file
13427 directive for the compilation unit's main source file. */
13428 current_file
= macro_set_main (pending_macros
, full_name
);
13430 current_file
= macro_include (current_file
, line
, full_name
);
13434 return current_file
;
13438 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
13439 followed by a null byte. */
13441 copy_string (const char *buf
, int len
)
13443 char *s
= xmalloc (len
+ 1);
13445 memcpy (s
, buf
, len
);
13451 static const char *
13452 consume_improper_spaces (const char *p
, const char *body
)
13456 complaint (&symfile_complaints
,
13457 _("macro definition contains spaces in formal argument list:\n`%s'"),
13469 parse_macro_definition (struct macro_source_file
*file
, int line
,
13474 /* The body string takes one of two forms. For object-like macro
13475 definitions, it should be:
13477 <macro name> " " <definition>
13479 For function-like macro definitions, it should be:
13481 <macro name> "() " <definition>
13483 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
13485 Spaces may appear only where explicitly indicated, and in the
13488 The Dwarf 2 spec says that an object-like macro's name is always
13489 followed by a space, but versions of GCC around March 2002 omit
13490 the space when the macro's definition is the empty string.
13492 The Dwarf 2 spec says that there should be no spaces between the
13493 formal arguments in a function-like macro's formal argument list,
13494 but versions of GCC around March 2002 include spaces after the
13498 /* Find the extent of the macro name. The macro name is terminated
13499 by either a space or null character (for an object-like macro) or
13500 an opening paren (for a function-like macro). */
13501 for (p
= body
; *p
; p
++)
13502 if (*p
== ' ' || *p
== '(')
13505 if (*p
== ' ' || *p
== '\0')
13507 /* It's an object-like macro. */
13508 int name_len
= p
- body
;
13509 char *name
= copy_string (body
, name_len
);
13510 const char *replacement
;
13513 replacement
= body
+ name_len
+ 1;
13516 dwarf2_macro_malformed_definition_complaint (body
);
13517 replacement
= body
+ name_len
;
13520 macro_define_object (file
, line
, name
, replacement
);
13524 else if (*p
== '(')
13526 /* It's a function-like macro. */
13527 char *name
= copy_string (body
, p
- body
);
13530 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
13534 p
= consume_improper_spaces (p
, body
);
13536 /* Parse the formal argument list. */
13537 while (*p
&& *p
!= ')')
13539 /* Find the extent of the current argument name. */
13540 const char *arg_start
= p
;
13542 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
13545 if (! *p
|| p
== arg_start
)
13546 dwarf2_macro_malformed_definition_complaint (body
);
13549 /* Make sure argv has room for the new argument. */
13550 if (argc
>= argv_size
)
13553 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
13556 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
13559 p
= consume_improper_spaces (p
, body
);
13561 /* Consume the comma, if present. */
13566 p
= consume_improper_spaces (p
, body
);
13575 /* Perfectly formed definition, no complaints. */
13576 macro_define_function (file
, line
, name
,
13577 argc
, (const char **) argv
,
13579 else if (*p
== '\0')
13581 /* Complain, but do define it. */
13582 dwarf2_macro_malformed_definition_complaint (body
);
13583 macro_define_function (file
, line
, name
,
13584 argc
, (const char **) argv
,
13588 /* Just complain. */
13589 dwarf2_macro_malformed_definition_complaint (body
);
13592 /* Just complain. */
13593 dwarf2_macro_malformed_definition_complaint (body
);
13599 for (i
= 0; i
< argc
; i
++)
13605 dwarf2_macro_malformed_definition_complaint (body
);
13610 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
13611 char *comp_dir
, bfd
*abfd
,
13612 struct dwarf2_cu
*cu
)
13614 gdb_byte
*mac_ptr
, *mac_end
;
13615 struct macro_source_file
*current_file
= 0;
13616 enum dwarf_macinfo_record_type macinfo_type
;
13617 int at_commandline
;
13619 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13620 &dwarf2_per_objfile
->macinfo
);
13621 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
13623 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
13627 /* First pass: Find the name of the base filename.
13628 This filename is needed in order to process all macros whose definition
13629 (or undefinition) comes from the command line. These macros are defined
13630 before the first DW_MACINFO_start_file entry, and yet still need to be
13631 associated to the base file.
13633 To determine the base file name, we scan the macro definitions until we
13634 reach the first DW_MACINFO_start_file entry. We then initialize
13635 CURRENT_FILE accordingly so that any macro definition found before the
13636 first DW_MACINFO_start_file can still be associated to the base file. */
13638 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13639 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
13640 + dwarf2_per_objfile
->macinfo
.size
;
13644 /* Do we at least have room for a macinfo type byte? */
13645 if (mac_ptr
>= mac_end
)
13647 /* Complaint is printed during the second pass as GDB will probably
13648 stop the first pass earlier upon finding DW_MACINFO_start_file. */
13652 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13655 switch (macinfo_type
)
13657 /* A zero macinfo type indicates the end of the macro
13662 case DW_MACINFO_define
:
13663 case DW_MACINFO_undef
:
13664 /* Only skip the data by MAC_PTR. */
13666 unsigned int bytes_read
;
13668 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13669 mac_ptr
+= bytes_read
;
13670 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13671 mac_ptr
+= bytes_read
;
13675 case DW_MACINFO_start_file
:
13677 unsigned int bytes_read
;
13680 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13681 mac_ptr
+= bytes_read
;
13682 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13683 mac_ptr
+= bytes_read
;
13685 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
13690 case DW_MACINFO_end_file
:
13691 /* No data to skip by MAC_PTR. */
13694 case DW_MACINFO_vendor_ext
:
13695 /* Only skip the data by MAC_PTR. */
13697 unsigned int bytes_read
;
13699 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13700 mac_ptr
+= bytes_read
;
13701 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13702 mac_ptr
+= bytes_read
;
13709 } while (macinfo_type
!= 0 && current_file
== NULL
);
13711 /* Second pass: Process all entries.
13713 Use the AT_COMMAND_LINE flag to determine whether we are still processing
13714 command-line macro definitions/undefinitions. This flag is unset when we
13715 reach the first DW_MACINFO_start_file entry. */
13717 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
13719 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
13720 GDB is still reading the definitions from command line. First
13721 DW_MACINFO_start_file will need to be ignored as it was already executed
13722 to create CURRENT_FILE for the main source holding also the command line
13723 definitions. On first met DW_MACINFO_start_file this flag is reset to
13724 normally execute all the remaining DW_MACINFO_start_file macinfos. */
13726 at_commandline
= 1;
13730 /* Do we at least have room for a macinfo type byte? */
13731 if (mac_ptr
>= mac_end
)
13733 dwarf2_macros_too_long_complaint ();
13737 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
13740 switch (macinfo_type
)
13742 /* A zero macinfo type indicates the end of the macro
13747 case DW_MACINFO_define
:
13748 case DW_MACINFO_undef
:
13750 unsigned int bytes_read
;
13754 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13755 mac_ptr
+= bytes_read
;
13756 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13757 mac_ptr
+= bytes_read
;
13759 if (! current_file
)
13761 /* DWARF violation as no main source is present. */
13762 complaint (&symfile_complaints
,
13763 _("debug info with no main source gives macro %s "
13765 macinfo_type
== DW_MACINFO_define
?
13767 macinfo_type
== DW_MACINFO_undef
?
13768 _("undefinition") :
13769 _("something-or-other"), line
, body
);
13772 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13773 complaint (&symfile_complaints
,
13774 _("debug info gives %s macro %s with %s line %d: %s"),
13775 at_commandline
? _("command-line") : _("in-file"),
13776 macinfo_type
== DW_MACINFO_define
?
13778 macinfo_type
== DW_MACINFO_undef
?
13779 _("undefinition") :
13780 _("something-or-other"),
13781 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
13783 if (macinfo_type
== DW_MACINFO_define
)
13784 parse_macro_definition (current_file
, line
, body
);
13785 else if (macinfo_type
== DW_MACINFO_undef
)
13786 macro_undef (current_file
, line
, body
);
13790 case DW_MACINFO_start_file
:
13792 unsigned int bytes_read
;
13795 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13796 mac_ptr
+= bytes_read
;
13797 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13798 mac_ptr
+= bytes_read
;
13800 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
13801 complaint (&symfile_complaints
,
13802 _("debug info gives source %d included "
13803 "from %s at %s line %d"),
13804 file
, at_commandline
? _("command-line") : _("file"),
13805 line
== 0 ? _("zero") : _("non-zero"), line
);
13807 if (at_commandline
)
13809 /* This DW_MACINFO_start_file was executed in the pass one. */
13810 at_commandline
= 0;
13813 current_file
= macro_start_file (file
, line
,
13814 current_file
, comp_dir
,
13819 case DW_MACINFO_end_file
:
13820 if (! current_file
)
13821 complaint (&symfile_complaints
,
13822 _("macro debug info has an unmatched `close_file' directive"));
13825 current_file
= current_file
->included_by
;
13826 if (! current_file
)
13828 enum dwarf_macinfo_record_type next_type
;
13830 /* GCC circa March 2002 doesn't produce the zero
13831 type byte marking the end of the compilation
13832 unit. Complain if it's not there, but exit no
13835 /* Do we at least have room for a macinfo type byte? */
13836 if (mac_ptr
>= mac_end
)
13838 dwarf2_macros_too_long_complaint ();
13842 /* We don't increment mac_ptr here, so this is just
13844 next_type
= read_1_byte (abfd
, mac_ptr
);
13845 if (next_type
!= 0)
13846 complaint (&symfile_complaints
,
13847 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
13854 case DW_MACINFO_vendor_ext
:
13856 unsigned int bytes_read
;
13860 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
13861 mac_ptr
+= bytes_read
;
13862 string
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
13863 mac_ptr
+= bytes_read
;
13865 /* We don't recognize any vendor extensions. */
13869 } while (macinfo_type
!= 0);
13872 /* Check if the attribute's form is a DW_FORM_block*
13873 if so return true else false. */
13875 attr_form_is_block (struct attribute
*attr
)
13877 return (attr
== NULL
? 0 :
13878 attr
->form
== DW_FORM_block1
13879 || attr
->form
== DW_FORM_block2
13880 || attr
->form
== DW_FORM_block4
13881 || attr
->form
== DW_FORM_block
13882 || attr
->form
== DW_FORM_exprloc
);
13885 /* Return non-zero if ATTR's value is a section offset --- classes
13886 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
13887 You may use DW_UNSND (attr) to retrieve such offsets.
13889 Section 7.5.4, "Attribute Encodings", explains that no attribute
13890 may have a value that belongs to more than one of these classes; it
13891 would be ambiguous if we did, because we use the same forms for all
13894 attr_form_is_section_offset (struct attribute
*attr
)
13896 return (attr
->form
== DW_FORM_data4
13897 || attr
->form
== DW_FORM_data8
13898 || attr
->form
== DW_FORM_sec_offset
);
13902 /* Return non-zero if ATTR's value falls in the 'constant' class, or
13903 zero otherwise. When this function returns true, you can apply
13904 dwarf2_get_attr_constant_value to it.
13906 However, note that for some attributes you must check
13907 attr_form_is_section_offset before using this test. DW_FORM_data4
13908 and DW_FORM_data8 are members of both the constant class, and of
13909 the classes that contain offsets into other debug sections
13910 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
13911 that, if an attribute's can be either a constant or one of the
13912 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
13913 taken as section offsets, not constants. */
13915 attr_form_is_constant (struct attribute
*attr
)
13917 switch (attr
->form
)
13919 case DW_FORM_sdata
:
13920 case DW_FORM_udata
:
13921 case DW_FORM_data1
:
13922 case DW_FORM_data2
:
13923 case DW_FORM_data4
:
13924 case DW_FORM_data8
:
13932 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
13933 struct dwarf2_cu
*cu
)
13935 if (attr_form_is_section_offset (attr
)
13936 /* ".debug_loc" may not exist at all, or the offset may be outside
13937 the section. If so, fall through to the complaint in the
13939 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
13941 struct dwarf2_loclist_baton
*baton
;
13943 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
13944 sizeof (struct dwarf2_loclist_baton
));
13945 baton
->per_cu
= cu
->per_cu
;
13946 gdb_assert (baton
->per_cu
);
13948 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
13949 &dwarf2_per_objfile
->loc
);
13951 /* We don't know how long the location list is, but make sure we
13952 don't run off the edge of the section. */
13953 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
13954 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
13955 baton
->base_address
= cu
->base_address
;
13956 if (cu
->base_known
== 0)
13957 complaint (&symfile_complaints
,
13958 _("Location list used without specifying the CU base address."));
13960 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
13961 SYMBOL_LOCATION_BATON (sym
) = baton
;
13965 struct dwarf2_locexpr_baton
*baton
;
13967 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
13968 sizeof (struct dwarf2_locexpr_baton
));
13969 baton
->per_cu
= cu
->per_cu
;
13970 gdb_assert (baton
->per_cu
);
13972 if (attr_form_is_block (attr
))
13974 /* Note that we're just copying the block's data pointer
13975 here, not the actual data. We're still pointing into the
13976 info_buffer for SYM's objfile; right now we never release
13977 that buffer, but when we do clean up properly this may
13979 baton
->size
= DW_BLOCK (attr
)->size
;
13980 baton
->data
= DW_BLOCK (attr
)->data
;
13984 dwarf2_invalid_attrib_class_complaint ("location description",
13985 SYMBOL_NATURAL_NAME (sym
));
13987 baton
->data
= NULL
;
13990 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
13991 SYMBOL_LOCATION_BATON (sym
) = baton
;
13995 /* Return the OBJFILE associated with the compilation unit CU. If CU
13996 came from a separate debuginfo file, then the master objfile is
14000 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
14002 struct objfile
*objfile
= per_cu
->objfile
;
14004 /* Return the master objfile, so that we can report and look up the
14005 correct file containing this variable. */
14006 if (objfile
->separate_debug_objfile_backlink
)
14007 objfile
= objfile
->separate_debug_objfile_backlink
;
14012 /* Return the address size given in the compilation unit header for CU. */
14015 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
14018 return per_cu
->cu
->header
.addr_size
;
14021 /* If the CU is not currently read in, we re-read its header. */
14022 struct objfile
*objfile
= per_cu
->objfile
;
14023 struct dwarf2_per_objfile
*per_objfile
14024 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14025 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14026 struct comp_unit_head cu_header
;
14028 memset (&cu_header
, 0, sizeof cu_header
);
14029 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14030 return cu_header
.addr_size
;
14034 /* Return the offset size given in the compilation unit header for CU. */
14037 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
14040 return per_cu
->cu
->header
.offset_size
;
14043 /* If the CU is not currently read in, we re-read its header. */
14044 struct objfile
*objfile
= per_cu
->objfile
;
14045 struct dwarf2_per_objfile
*per_objfile
14046 = objfile_data (objfile
, dwarf2_objfile_data_key
);
14047 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
14048 struct comp_unit_head cu_header
;
14050 memset (&cu_header
, 0, sizeof cu_header
);
14051 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
14052 return cu_header
.offset_size
;
14056 /* Return the text offset of the CU. The returned offset comes from
14057 this CU's objfile. If this objfile came from a separate debuginfo
14058 file, then the offset may be different from the corresponding
14059 offset in the parent objfile. */
14062 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
14064 struct objfile
*objfile
= per_cu
->objfile
;
14066 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14069 /* Locate the .debug_info compilation unit from CU's objfile which contains
14070 the DIE at OFFSET. Raises an error on failure. */
14072 static struct dwarf2_per_cu_data
*
14073 dwarf2_find_containing_comp_unit (unsigned int offset
,
14074 struct objfile
*objfile
)
14076 struct dwarf2_per_cu_data
*this_cu
;
14080 high
= dwarf2_per_objfile
->n_comp_units
- 1;
14083 int mid
= low
+ (high
- low
) / 2;
14085 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
14090 gdb_assert (low
== high
);
14091 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
14094 error (_("Dwarf Error: could not find partial DIE containing "
14095 "offset 0x%lx [in module %s]"),
14096 (long) offset
, bfd_get_filename (objfile
->obfd
));
14098 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
14099 return dwarf2_per_objfile
->all_comp_units
[low
-1];
14103 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
14104 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
14105 && offset
>= this_cu
->offset
+ this_cu
->length
)
14106 error (_("invalid dwarf2 offset %u"), offset
);
14107 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
14112 /* Locate the compilation unit from OBJFILE which is located at exactly
14113 OFFSET. Raises an error on failure. */
14115 static struct dwarf2_per_cu_data
*
14116 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
14118 struct dwarf2_per_cu_data
*this_cu
;
14120 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
14121 if (this_cu
->offset
!= offset
)
14122 error (_("no compilation unit with offset %u."), offset
);
14126 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
14128 static struct dwarf2_cu
*
14129 alloc_one_comp_unit (struct objfile
*objfile
)
14131 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
14132 cu
->objfile
= objfile
;
14133 obstack_init (&cu
->comp_unit_obstack
);
14137 /* Release one cached compilation unit, CU. We unlink it from the tree
14138 of compilation units, but we don't remove it from the read_in_chain;
14139 the caller is responsible for that.
14140 NOTE: DATA is a void * because this function is also used as a
14141 cleanup routine. */
14144 free_one_comp_unit (void *data
)
14146 struct dwarf2_cu
*cu
= data
;
14148 if (cu
->per_cu
!= NULL
)
14149 cu
->per_cu
->cu
= NULL
;
14152 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14157 /* This cleanup function is passed the address of a dwarf2_cu on the stack
14158 when we're finished with it. We can't free the pointer itself, but be
14159 sure to unlink it from the cache. Also release any associated storage
14160 and perform cache maintenance.
14162 Only used during partial symbol parsing. */
14165 free_stack_comp_unit (void *data
)
14167 struct dwarf2_cu
*cu
= data
;
14169 obstack_free (&cu
->comp_unit_obstack
, NULL
);
14170 cu
->partial_dies
= NULL
;
14172 if (cu
->per_cu
!= NULL
)
14174 /* This compilation unit is on the stack in our caller, so we
14175 should not xfree it. Just unlink it. */
14176 cu
->per_cu
->cu
= NULL
;
14179 /* If we had a per-cu pointer, then we may have other compilation
14180 units loaded, so age them now. */
14181 age_cached_comp_units ();
14185 /* Free all cached compilation units. */
14188 free_cached_comp_units (void *data
)
14190 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14192 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14193 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14194 while (per_cu
!= NULL
)
14196 struct dwarf2_per_cu_data
*next_cu
;
14198 next_cu
= per_cu
->cu
->read_in_chain
;
14200 free_one_comp_unit (per_cu
->cu
);
14201 *last_chain
= next_cu
;
14207 /* Increase the age counter on each cached compilation unit, and free
14208 any that are too old. */
14211 age_cached_comp_units (void)
14213 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14215 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
14216 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14217 while (per_cu
!= NULL
)
14219 per_cu
->cu
->last_used
++;
14220 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
14221 dwarf2_mark (per_cu
->cu
);
14222 per_cu
= per_cu
->cu
->read_in_chain
;
14225 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14226 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14227 while (per_cu
!= NULL
)
14229 struct dwarf2_per_cu_data
*next_cu
;
14231 next_cu
= per_cu
->cu
->read_in_chain
;
14233 if (!per_cu
->cu
->mark
)
14235 free_one_comp_unit (per_cu
->cu
);
14236 *last_chain
= next_cu
;
14239 last_chain
= &per_cu
->cu
->read_in_chain
;
14245 /* Remove a single compilation unit from the cache. */
14248 free_one_cached_comp_unit (void *target_cu
)
14250 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
14252 per_cu
= dwarf2_per_objfile
->read_in_chain
;
14253 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
14254 while (per_cu
!= NULL
)
14256 struct dwarf2_per_cu_data
*next_cu
;
14258 next_cu
= per_cu
->cu
->read_in_chain
;
14260 if (per_cu
->cu
== target_cu
)
14262 free_one_comp_unit (per_cu
->cu
);
14263 *last_chain
= next_cu
;
14267 last_chain
= &per_cu
->cu
->read_in_chain
;
14273 /* Release all extra memory associated with OBJFILE. */
14276 dwarf2_free_objfile (struct objfile
*objfile
)
14278 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
14280 if (dwarf2_per_objfile
== NULL
)
14283 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
14284 free_cached_comp_units (NULL
);
14286 if (dwarf2_per_objfile
->using_index
)
14290 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
14293 struct dwarf2_per_cu_data
*per_cu
=
14294 dwarf2_per_objfile
->all_comp_units
[i
];
14296 if (!per_cu
->v
.quick
->lines
)
14299 for (j
= 0; j
< per_cu
->v
.quick
->lines
->num_file_names
; ++j
)
14301 if (per_cu
->v
.quick
->file_names
)
14302 xfree ((void *) per_cu
->v
.quick
->file_names
[j
]);
14303 if (per_cu
->v
.quick
->full_names
)
14304 xfree ((void *) per_cu
->v
.quick
->full_names
[j
]);
14307 free_line_header (per_cu
->v
.quick
->lines
);
14311 /* Everything else should be on the objfile obstack. */
14314 /* A pair of DIE offset and GDB type pointer. We store these
14315 in a hash table separate from the DIEs, and preserve them
14316 when the DIEs are flushed out of cache. */
14318 struct dwarf2_offset_and_type
14320 unsigned int offset
;
14324 /* Hash function for a dwarf2_offset_and_type. */
14327 offset_and_type_hash (const void *item
)
14329 const struct dwarf2_offset_and_type
*ofs
= item
;
14331 return ofs
->offset
;
14334 /* Equality function for a dwarf2_offset_and_type. */
14337 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
14339 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
14340 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
14342 return ofs_lhs
->offset
== ofs_rhs
->offset
;
14345 /* Set the type associated with DIE to TYPE. Save it in CU's hash
14346 table if necessary. For convenience, return TYPE.
14348 The DIEs reading must have careful ordering to:
14349 * Not cause infite loops trying to read in DIEs as a prerequisite for
14350 reading current DIE.
14351 * Not trying to dereference contents of still incompletely read in types
14352 while reading in other DIEs.
14353 * Enable referencing still incompletely read in types just by a pointer to
14354 the type without accessing its fields.
14356 Therefore caller should follow these rules:
14357 * Try to fetch any prerequisite types we may need to build this DIE type
14358 before building the type and calling set_die_type.
14359 * After building type call set_die_type for current DIE as soon as
14360 possible before fetching more types to complete the current type.
14361 * Make the type as complete as possible before fetching more types. */
14363 static struct type
*
14364 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
14366 struct dwarf2_offset_and_type
**slot
, ofs
;
14367 struct objfile
*objfile
= cu
->objfile
;
14368 htab_t
*type_hash_ptr
;
14370 /* For Ada types, make sure that the gnat-specific data is always
14371 initialized (if not already set). There are a few types where
14372 we should not be doing so, because the type-specific area is
14373 already used to hold some other piece of info (eg: TYPE_CODE_FLT
14374 where the type-specific area is used to store the floatformat).
14375 But this is not a problem, because the gnat-specific information
14376 is actually not needed for these types. */
14377 if (need_gnat_info (cu
)
14378 && TYPE_CODE (type
) != TYPE_CODE_FUNC
14379 && TYPE_CODE (type
) != TYPE_CODE_FLT
14380 && !HAVE_GNAT_AUX_INFO (type
))
14381 INIT_GNAT_SPECIFIC (type
);
14383 if (cu
->per_cu
->from_debug_types
)
14384 type_hash_ptr
= &dwarf2_per_objfile
->debug_types_type_hash
;
14386 type_hash_ptr
= &dwarf2_per_objfile
->debug_info_type_hash
;
14388 if (*type_hash_ptr
== NULL
)
14391 = htab_create_alloc_ex (127,
14392 offset_and_type_hash
,
14393 offset_and_type_eq
,
14395 &objfile
->objfile_obstack
,
14396 hashtab_obstack_allocate
,
14397 dummy_obstack_deallocate
);
14400 ofs
.offset
= die
->offset
;
14402 slot
= (struct dwarf2_offset_and_type
**)
14403 htab_find_slot_with_hash (*type_hash_ptr
, &ofs
, ofs
.offset
, INSERT
);
14405 complaint (&symfile_complaints
,
14406 _("A problem internal to GDB: DIE 0x%x has type already set"),
14408 *slot
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (**slot
));
14413 /* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
14414 table, or return NULL if the die does not have a saved type. */
14416 static struct type
*
14417 get_die_type_at_offset (unsigned int offset
,
14418 struct dwarf2_per_cu_data
*per_cu
)
14420 struct dwarf2_offset_and_type
*slot
, ofs
;
14423 if (per_cu
->from_debug_types
)
14424 type_hash
= dwarf2_per_objfile
->debug_types_type_hash
;
14426 type_hash
= dwarf2_per_objfile
->debug_info_type_hash
;
14427 if (type_hash
== NULL
)
14430 ofs
.offset
= offset
;
14431 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
14438 /* Look up the type for DIE in the appropriate type_hash table,
14439 or return NULL if DIE does not have a saved type. */
14441 static struct type
*
14442 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14444 return get_die_type_at_offset (die
->offset
, cu
->per_cu
);
14447 /* Add a dependence relationship from CU to REF_PER_CU. */
14450 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
14451 struct dwarf2_per_cu_data
*ref_per_cu
)
14455 if (cu
->dependencies
== NULL
)
14457 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
14458 NULL
, &cu
->comp_unit_obstack
,
14459 hashtab_obstack_allocate
,
14460 dummy_obstack_deallocate
);
14462 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
14464 *slot
= ref_per_cu
;
14467 /* Subroutine of dwarf2_mark to pass to htab_traverse.
14468 Set the mark field in every compilation unit in the
14469 cache that we must keep because we are keeping CU. */
14472 dwarf2_mark_helper (void **slot
, void *data
)
14474 struct dwarf2_per_cu_data
*per_cu
;
14476 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
14477 if (per_cu
->cu
->mark
)
14479 per_cu
->cu
->mark
= 1;
14481 if (per_cu
->cu
->dependencies
!= NULL
)
14482 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14487 /* Set the mark field in CU and in every other compilation unit in the
14488 cache that we must keep because we are keeping CU. */
14491 dwarf2_mark (struct dwarf2_cu
*cu
)
14496 if (cu
->dependencies
!= NULL
)
14497 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
14501 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
14505 per_cu
->cu
->mark
= 0;
14506 per_cu
= per_cu
->cu
->read_in_chain
;
14510 /* Trivial hash function for partial_die_info: the hash value of a DIE
14511 is its offset in .debug_info for this objfile. */
14514 partial_die_hash (const void *item
)
14516 const struct partial_die_info
*part_die
= item
;
14518 return part_die
->offset
;
14521 /* Trivial comparison function for partial_die_info structures: two DIEs
14522 are equal if they have the same offset. */
14525 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
14527 const struct partial_die_info
*part_die_lhs
= item_lhs
;
14528 const struct partial_die_info
*part_die_rhs
= item_rhs
;
14530 return part_die_lhs
->offset
== part_die_rhs
->offset
;
14533 static struct cmd_list_element
*set_dwarf2_cmdlist
;
14534 static struct cmd_list_element
*show_dwarf2_cmdlist
;
14537 set_dwarf2_cmd (char *args
, int from_tty
)
14539 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
14543 show_dwarf2_cmd (char *args
, int from_tty
)
14545 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
14548 /* If section described by INFO was mmapped, munmap it now. */
14551 munmap_section_buffer (struct dwarf2_section_info
*info
)
14553 if (info
->was_mmapped
)
14556 intptr_t begin
= (intptr_t) info
->buffer
;
14557 intptr_t map_begin
= begin
& ~(pagesize
- 1);
14558 size_t map_length
= info
->size
+ begin
- map_begin
;
14560 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
14562 /* Without HAVE_MMAP, we should never be here to begin with. */
14563 gdb_assert_not_reached ("no mmap support");
14568 /* munmap debug sections for OBJFILE, if necessary. */
14571 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
14573 struct dwarf2_per_objfile
*data
= d
;
14575 /* This is sorted according to the order they're defined in to make it easier
14576 to keep in sync. */
14577 munmap_section_buffer (&data
->info
);
14578 munmap_section_buffer (&data
->abbrev
);
14579 munmap_section_buffer (&data
->line
);
14580 munmap_section_buffer (&data
->loc
);
14581 munmap_section_buffer (&data
->macinfo
);
14582 munmap_section_buffer (&data
->str
);
14583 munmap_section_buffer (&data
->ranges
);
14584 munmap_section_buffer (&data
->types
);
14585 munmap_section_buffer (&data
->frame
);
14586 munmap_section_buffer (&data
->eh_frame
);
14587 munmap_section_buffer (&data
->gdb_index
);
14592 /* The contents of the hash table we create when building the string
14594 struct strtab_entry
14596 offset_type offset
;
14600 /* Hash function for a strtab_entry. */
14602 hash_strtab_entry (const void *e
)
14604 const struct strtab_entry
*entry
= e
;
14605 return mapped_index_string_hash (entry
->str
);
14608 /* Equality function for a strtab_entry. */
14610 eq_strtab_entry (const void *a
, const void *b
)
14612 const struct strtab_entry
*ea
= a
;
14613 const struct strtab_entry
*eb
= b
;
14614 return !strcmp (ea
->str
, eb
->str
);
14617 /* Create a strtab_entry hash table. */
14619 create_strtab (void)
14621 return htab_create_alloc (100, hash_strtab_entry
, eq_strtab_entry
,
14622 xfree
, xcalloc
, xfree
);
14625 /* Add a string to the constant pool. Return the string's offset in
14628 add_string (htab_t table
, struct obstack
*cpool
, const char *str
)
14631 struct strtab_entry entry
;
14632 struct strtab_entry
*result
;
14635 slot
= htab_find_slot (table
, &entry
, INSERT
);
14640 result
= XNEW (struct strtab_entry
);
14641 result
->offset
= obstack_object_size (cpool
);
14643 obstack_grow_str0 (cpool
, str
);
14646 return result
->offset
;
14649 /* An entry in the symbol table. */
14650 struct symtab_index_entry
14652 /* The name of the symbol. */
14654 /* The offset of the name in the constant pool. */
14655 offset_type index_offset
;
14656 /* A sorted vector of the indices of all the CUs that hold an object
14658 VEC (offset_type
) *cu_indices
;
14661 /* The symbol table. This is a power-of-2-sized hash table. */
14662 struct mapped_symtab
14664 offset_type n_elements
;
14666 struct symtab_index_entry
**data
;
14669 /* Hash function for a symtab_index_entry. */
14671 hash_symtab_entry (const void *e
)
14673 const struct symtab_index_entry
*entry
= e
;
14674 return iterative_hash (VEC_address (offset_type
, entry
->cu_indices
),
14675 sizeof (offset_type
) * VEC_length (offset_type
,
14676 entry
->cu_indices
),
14680 /* Equality function for a symtab_index_entry. */
14682 eq_symtab_entry (const void *a
, const void *b
)
14684 const struct symtab_index_entry
*ea
= a
;
14685 const struct symtab_index_entry
*eb
= b
;
14686 int len
= VEC_length (offset_type
, ea
->cu_indices
);
14687 if (len
!= VEC_length (offset_type
, eb
->cu_indices
))
14689 return !memcmp (VEC_address (offset_type
, ea
->cu_indices
),
14690 VEC_address (offset_type
, eb
->cu_indices
),
14691 sizeof (offset_type
) * len
);
14694 /* Destroy a symtab_index_entry. */
14696 delete_symtab_entry (void *p
)
14698 struct symtab_index_entry
*entry
= p
;
14699 VEC_free (offset_type
, entry
->cu_indices
);
14703 /* Create a hash table holding symtab_index_entry objects. */
14705 create_index_table (void)
14707 return htab_create_alloc (100, hash_symtab_entry
, eq_symtab_entry
,
14708 delete_symtab_entry
, xcalloc
, xfree
);
14711 /* Create a new mapped symtab object. */
14712 static struct mapped_symtab
*
14713 create_mapped_symtab (void)
14715 struct mapped_symtab
*symtab
= XNEW (struct mapped_symtab
);
14716 symtab
->n_elements
= 0;
14717 symtab
->size
= 1024;
14718 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14722 /* Destroy a mapped_symtab. */
14724 cleanup_mapped_symtab (void *p
)
14726 struct mapped_symtab
*symtab
= p
;
14727 /* The contents of the array are freed when the other hash table is
14729 xfree (symtab
->data
);
14733 /* Find a slot in SYMTAB for the symbol NAME. Returns a pointer to
14735 static struct symtab_index_entry
**
14736 find_slot (struct mapped_symtab
*symtab
, const char *name
)
14738 offset_type index
, step
, hash
= mapped_index_string_hash (name
);
14740 index
= hash
& (symtab
->size
- 1);
14741 step
= ((hash
* 17) & (symtab
->size
- 1)) | 1;
14745 if (!symtab
->data
[index
] || !strcmp (name
, symtab
->data
[index
]->name
))
14746 return &symtab
->data
[index
];
14747 index
= (index
+ step
) & (symtab
->size
- 1);
14751 /* Expand SYMTAB's hash table. */
14753 hash_expand (struct mapped_symtab
*symtab
)
14755 offset_type old_size
= symtab
->size
;
14757 struct symtab_index_entry
**old_entries
= symtab
->data
;
14760 symtab
->data
= XCNEWVEC (struct symtab_index_entry
*, symtab
->size
);
14762 for (i
= 0; i
< old_size
; ++i
)
14764 if (old_entries
[i
])
14766 struct symtab_index_entry
**slot
= find_slot (symtab
,
14767 old_entries
[i
]->name
);
14768 *slot
= old_entries
[i
];
14772 xfree (old_entries
);
14775 /* Add an entry to SYMTAB. NAME is the name of the symbol. CU_INDEX
14776 is the index of the CU in which the symbol appears. */
14778 add_index_entry (struct mapped_symtab
*symtab
, const char *name
,
14779 offset_type cu_index
)
14781 struct symtab_index_entry
**slot
;
14783 ++symtab
->n_elements
;
14784 if (4 * symtab
->n_elements
/ 3 >= symtab
->size
)
14785 hash_expand (symtab
);
14787 slot
= find_slot (symtab
, name
);
14790 *slot
= XNEW (struct symtab_index_entry
);
14791 (*slot
)->name
= name
;
14792 (*slot
)->cu_indices
= NULL
;
14794 /* Don't push an index twice. Due to how we add entries we only
14795 have to check the last one. */
14796 if (VEC_empty (offset_type
, (*slot
)->cu_indices
)
14797 || VEC_length (offset_type
, (*slot
)->cu_indices
) != cu_index
)
14798 VEC_safe_push (offset_type
, (*slot
)->cu_indices
, cu_index
);
14801 /* Add a vector of indices to the constant pool. */
14803 add_indices_to_cpool (htab_t index_table
, struct obstack
*cpool
,
14804 struct symtab_index_entry
*entry
)
14808 slot
= htab_find_slot (index_table
, entry
, INSERT
);
14811 offset_type len
= VEC_length (offset_type
, entry
->cu_indices
);
14812 offset_type val
= MAYBE_SWAP (len
);
14817 entry
->index_offset
= obstack_object_size (cpool
);
14819 obstack_grow (cpool
, &val
, sizeof (val
));
14821 VEC_iterate (offset_type
, entry
->cu_indices
, i
, iter
);
14824 val
= MAYBE_SWAP (iter
);
14825 obstack_grow (cpool
, &val
, sizeof (val
));
14830 struct symtab_index_entry
*old_entry
= *slot
;
14831 entry
->index_offset
= old_entry
->index_offset
;
14834 return entry
->index_offset
;
14837 /* Write the mapped hash table SYMTAB to the obstack OUTPUT, with
14838 constant pool entries going into the obstack CPOOL. */
14840 write_hash_table (struct mapped_symtab
*symtab
,
14841 struct obstack
*output
, struct obstack
*cpool
)
14844 htab_t index_table
;
14847 index_table
= create_index_table ();
14848 str_table
= create_strtab ();
14849 /* We add all the index vectors to the constant pool first, to
14850 ensure alignment is ok. */
14851 for (i
= 0; i
< symtab
->size
; ++i
)
14853 if (symtab
->data
[i
])
14854 add_indices_to_cpool (index_table
, cpool
, symtab
->data
[i
]);
14857 /* Now write out the hash table. */
14858 for (i
= 0; i
< symtab
->size
; ++i
)
14860 offset_type str_off
, vec_off
;
14862 if (symtab
->data
[i
])
14864 str_off
= add_string (str_table
, cpool
, symtab
->data
[i
]->name
);
14865 vec_off
= symtab
->data
[i
]->index_offset
;
14869 /* While 0 is a valid constant pool index, it is not valid
14870 to have 0 for both offsets. */
14875 str_off
= MAYBE_SWAP (str_off
);
14876 vec_off
= MAYBE_SWAP (vec_off
);
14878 obstack_grow (output
, &str_off
, sizeof (str_off
));
14879 obstack_grow (output
, &vec_off
, sizeof (vec_off
));
14882 htab_delete (str_table
);
14883 htab_delete (index_table
);
14886 /* Write an address entry to ADDR_OBSTACK. The addresses are taken
14887 from PST; CU_INDEX is the index of the CU in the vector of all
14890 add_address_entry (struct objfile
*objfile
,
14891 struct obstack
*addr_obstack
, struct partial_symtab
*pst
,
14892 unsigned int cu_index
)
14894 offset_type offset
;
14896 CORE_ADDR baseaddr
;
14898 /* Don't bother recording empty ranges. */
14899 if (pst
->textlow
== pst
->texthigh
)
14902 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14904 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->textlow
- baseaddr
);
14905 obstack_grow (addr_obstack
, addr
, 8);
14906 store_unsigned_integer (addr
, 8, BFD_ENDIAN_LITTLE
, pst
->texthigh
- baseaddr
);
14907 obstack_grow (addr_obstack
, addr
, 8);
14908 offset
= MAYBE_SWAP (cu_index
);
14909 obstack_grow (addr_obstack
, &offset
, sizeof (offset_type
));
14912 /* Add a list of partial symbols to SYMTAB. */
14914 write_psymbols (struct mapped_symtab
*symtab
,
14916 struct partial_symbol
**psymp
,
14918 offset_type cu_index
,
14921 for (; count
-- > 0; ++psymp
)
14923 void **slot
, *lookup
;
14925 if (SYMBOL_LANGUAGE (*psymp
) == language_ada
)
14926 error (_("Ada is not currently supported by the index"));
14928 /* We only want to add a given psymbol once. However, we also
14929 want to account for whether it is global or static. So, we
14930 may add it twice, using slightly different values. */
14933 uintptr_t val
= 1 | (uintptr_t) *psymp
;
14935 lookup
= (void *) val
;
14940 /* Only add a given psymbol once. */
14941 slot
= htab_find_slot (psyms_seen
, lookup
, INSERT
);
14945 add_index_entry (symtab
, SYMBOL_NATURAL_NAME (*psymp
), cu_index
);
14950 /* Write the contents of an ("unfinished") obstack to FILE. Throw an
14951 exception if there is an error. */
14953 write_obstack (FILE *file
, struct obstack
*obstack
)
14955 if (fwrite (obstack_base (obstack
), 1, obstack_object_size (obstack
),
14957 != obstack_object_size (obstack
))
14958 error (_("couldn't data write to file"));
14961 /* Unlink a file if the argument is not NULL. */
14963 unlink_if_set (void *p
)
14965 char **filename
= p
;
14967 unlink (*filename
);
14970 /* A helper struct used when iterating over debug_types. */
14971 struct signatured_type_index_data
14973 struct objfile
*objfile
;
14974 struct mapped_symtab
*symtab
;
14975 struct obstack
*types_list
;
14980 /* A helper function that writes a single signatured_type to an
14983 write_one_signatured_type (void **slot
, void *d
)
14985 struct signatured_type_index_data
*info
= d
;
14986 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
14987 struct dwarf2_per_cu_data
*per_cu
= &entry
->per_cu
;
14988 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
14991 write_psymbols (info
->symtab
,
14993 info
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
14994 psymtab
->n_global_syms
, info
->cu_index
,
14996 write_psymbols (info
->symtab
,
14998 info
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
14999 psymtab
->n_static_syms
, info
->cu_index
,
15002 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->offset
);
15003 obstack_grow (info
->types_list
, val
, 8);
15004 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->type_offset
);
15005 obstack_grow (info
->types_list
, val
, 8);
15006 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, entry
->signature
);
15007 obstack_grow (info
->types_list
, val
, 8);
15014 /* A cleanup function for an htab_t. */
15017 cleanup_htab (void *arg
)
15022 /* Create an index file for OBJFILE in the directory DIR. */
15024 write_psymtabs_to_index (struct objfile
*objfile
, const char *dir
)
15026 struct cleanup
*cleanup
;
15027 char *filename
, *cleanup_filename
;
15028 struct obstack contents
, addr_obstack
, constant_pool
, symtab_obstack
;
15029 struct obstack cu_list
, types_cu_list
;
15032 struct mapped_symtab
*symtab
;
15033 offset_type val
, size_of_contents
, total_len
;
15038 if (!objfile
->psymtabs
)
15040 if (dwarf2_per_objfile
->using_index
)
15041 error (_("Cannot use an index to create the index"));
15043 if (stat (objfile
->name
, &st
) < 0)
15044 perror_with_name (_("Could not stat"));
15046 filename
= concat (dir
, SLASH_STRING
, lbasename (objfile
->name
),
15047 INDEX_SUFFIX
, (char *) NULL
);
15048 cleanup
= make_cleanup (xfree
, filename
);
15050 out_file
= fopen (filename
, "wb");
15052 error (_("Can't open `%s' for writing"), filename
);
15054 cleanup_filename
= filename
;
15055 make_cleanup (unlink_if_set
, &cleanup_filename
);
15057 symtab
= create_mapped_symtab ();
15058 make_cleanup (cleanup_mapped_symtab
, symtab
);
15060 obstack_init (&addr_obstack
);
15061 make_cleanup_obstack_free (&addr_obstack
);
15063 obstack_init (&cu_list
);
15064 make_cleanup_obstack_free (&cu_list
);
15066 obstack_init (&types_cu_list
);
15067 make_cleanup_obstack_free (&types_cu_list
);
15069 psyms_seen
= htab_create_alloc (100, htab_hash_pointer
, htab_eq_pointer
,
15070 NULL
, xcalloc
, xfree
);
15071 make_cleanup (cleanup_htab
, psyms_seen
);
15073 /* The list is already sorted, so we don't need to do additional
15074 work here. Also, the debug_types entries do not appear in
15075 all_comp_units, but only in their own hash table. */
15076 for (i
= 0; i
< dwarf2_per_objfile
->n_comp_units
; ++i
)
15078 struct dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->all_comp_units
[i
];
15079 struct partial_symtab
*psymtab
= per_cu
->v
.psymtab
;
15082 write_psymbols (symtab
,
15084 objfile
->global_psymbols
.list
+ psymtab
->globals_offset
,
15085 psymtab
->n_global_syms
, i
,
15087 write_psymbols (symtab
,
15089 objfile
->static_psymbols
.list
+ psymtab
->statics_offset
,
15090 psymtab
->n_static_syms
, i
,
15093 add_address_entry (objfile
, &addr_obstack
, psymtab
, i
);
15095 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->offset
);
15096 obstack_grow (&cu_list
, val
, 8);
15097 store_unsigned_integer (val
, 8, BFD_ENDIAN_LITTLE
, per_cu
->length
);
15098 obstack_grow (&cu_list
, val
, 8);
15101 /* Write out the .debug_type entries, if any. */
15102 if (dwarf2_per_objfile
->signatured_types
)
15104 struct signatured_type_index_data sig_data
;
15106 sig_data
.objfile
= objfile
;
15107 sig_data
.symtab
= symtab
;
15108 sig_data
.types_list
= &types_cu_list
;
15109 sig_data
.psyms_seen
= psyms_seen
;
15110 sig_data
.cu_index
= dwarf2_per_objfile
->n_comp_units
;
15111 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
15112 write_one_signatured_type
, &sig_data
);
15115 obstack_init (&constant_pool
);
15116 make_cleanup_obstack_free (&constant_pool
);
15117 obstack_init (&symtab_obstack
);
15118 make_cleanup_obstack_free (&symtab_obstack
);
15119 write_hash_table (symtab
, &symtab_obstack
, &constant_pool
);
15121 obstack_init (&contents
);
15122 make_cleanup_obstack_free (&contents
);
15123 size_of_contents
= 6 * sizeof (offset_type
);
15124 total_len
= size_of_contents
;
15126 /* The version number. */
15127 val
= MAYBE_SWAP (3);
15128 obstack_grow (&contents
, &val
, sizeof (val
));
15130 /* The offset of the CU list from the start of the file. */
15131 val
= MAYBE_SWAP (total_len
);
15132 obstack_grow (&contents
, &val
, sizeof (val
));
15133 total_len
+= obstack_object_size (&cu_list
);
15135 /* The offset of the types CU list from the start of the file. */
15136 val
= MAYBE_SWAP (total_len
);
15137 obstack_grow (&contents
, &val
, sizeof (val
));
15138 total_len
+= obstack_object_size (&types_cu_list
);
15140 /* The offset of the address table from the start of the file. */
15141 val
= MAYBE_SWAP (total_len
);
15142 obstack_grow (&contents
, &val
, sizeof (val
));
15143 total_len
+= obstack_object_size (&addr_obstack
);
15145 /* The offset of the symbol table from the start of the file. */
15146 val
= MAYBE_SWAP (total_len
);
15147 obstack_grow (&contents
, &val
, sizeof (val
));
15148 total_len
+= obstack_object_size (&symtab_obstack
);
15150 /* The offset of the constant pool from the start of the file. */
15151 val
= MAYBE_SWAP (total_len
);
15152 obstack_grow (&contents
, &val
, sizeof (val
));
15153 total_len
+= obstack_object_size (&constant_pool
);
15155 gdb_assert (obstack_object_size (&contents
) == size_of_contents
);
15157 write_obstack (out_file
, &contents
);
15158 write_obstack (out_file
, &cu_list
);
15159 write_obstack (out_file
, &types_cu_list
);
15160 write_obstack (out_file
, &addr_obstack
);
15161 write_obstack (out_file
, &symtab_obstack
);
15162 write_obstack (out_file
, &constant_pool
);
15166 /* We want to keep the file, so we set cleanup_filename to NULL
15167 here. See unlink_if_set. */
15168 cleanup_filename
= NULL
;
15170 do_cleanups (cleanup
);
15173 /* The mapped index file format is designed to be directly mmap()able
15174 on any architecture. In most cases, a datum is represented using a
15175 little-endian 32-bit integer value, called an offset_type. Big
15176 endian machines must byte-swap the values before using them.
15177 Exceptions to this rule are noted. The data is laid out such that
15178 alignment is always respected.
15180 A mapped index consists of several sections.
15182 1. The file header. This is a sequence of values, of offset_type
15183 unless otherwise noted:
15185 [0] The version number, currently 3. Versions 1 and 2 are
15187 [1] The offset, from the start of the file, of the CU list.
15188 [2] The offset, from the start of the file, of the types CU list.
15189 Note that this section can be empty, in which case this offset will
15190 be equal to the next offset.
15191 [3] The offset, from the start of the file, of the address section.
15192 [4] The offset, from the start of the file, of the symbol table.
15193 [5] The offset, from the start of the file, of the constant pool.
15195 2. The CU list. This is a sequence of pairs of 64-bit
15196 little-endian values, sorted by the CU offset. The first element
15197 in each pair is the offset of a CU in the .debug_info section. The
15198 second element in each pair is the length of that CU. References
15199 to a CU elsewhere in the map are done using a CU index, which is
15200 just the 0-based index into this table. Note that if there are
15201 type CUs, then conceptually CUs and type CUs form a single list for
15202 the purposes of CU indices.
15204 3. The types CU list. This is a sequence of triplets of 64-bit
15205 little-endian values. In a triplet, the first value is the CU
15206 offset, the second value is the type offset in the CU, and the
15207 third value is the type signature. The types CU list is not
15210 4. The address section. The address section consists of a sequence
15211 of address entries. Each address entry has three elements.
15212 [0] The low address. This is a 64-bit little-endian value.
15213 [1] The high address. This is a 64-bit little-endian value.
15214 [2] The CU index. This is an offset_type value.
15216 5. The symbol table. This is a hash table. The size of the hash
15217 table is always a power of 2. The initial hash and the step are
15218 currently defined by the `find_slot' function.
15220 Each slot in the hash table consists of a pair of offset_type
15221 values. The first value is the offset of the symbol's name in the
15222 constant pool. The second value is the offset of the CU vector in
15225 If both values are 0, then this slot in the hash table is empty.
15226 This is ok because while 0 is a valid constant pool index, it
15227 cannot be a valid index for both a string and a CU vector.
15229 A string in the constant pool is stored as a \0-terminated string,
15232 A CU vector in the constant pool is a sequence of offset_type
15233 values. The first value is the number of CU indices in the vector.
15234 Each subsequent value is the index of a CU in the CU list. This
15235 element in the hash table is used to indicate which CUs define the
15238 6. The constant pool. This is simply a bunch of bytes. It is
15239 organized so that alignment is correct: CU vectors are stored
15240 first, followed by strings. */
15242 save_gdb_index_command (char *arg
, int from_tty
)
15244 struct objfile
*objfile
;
15247 error (_("usage: save gdb-index DIRECTORY"));
15249 ALL_OBJFILES (objfile
)
15253 /* If the objfile does not correspond to an actual file, skip it. */
15254 if (stat (objfile
->name
, &st
) < 0)
15257 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
15258 if (dwarf2_per_objfile
)
15260 volatile struct gdb_exception except
;
15262 TRY_CATCH (except
, RETURN_MASK_ERROR
)
15264 write_psymtabs_to_index (objfile
, arg
);
15266 if (except
.reason
< 0)
15267 exception_fprintf (gdb_stderr
, except
,
15268 _("Error while writing index for `%s': "),
15276 int dwarf2_always_disassemble
;
15279 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
15280 struct cmd_list_element
*c
, const char *value
)
15282 fprintf_filtered (file
, _("\
15283 Whether to always disassemble DWARF expressions is %s.\n"),
15287 void _initialize_dwarf2_read (void);
15290 _initialize_dwarf2_read (void)
15292 struct cmd_list_element
*c
;
15294 dwarf2_objfile_data_key
15295 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
15297 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
15298 Set DWARF 2 specific variables.\n\
15299 Configure DWARF 2 variables such as the cache size"),
15300 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
15301 0/*allow-unknown*/, &maintenance_set_cmdlist
);
15303 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
15304 Show DWARF 2 specific variables\n\
15305 Show DWARF 2 variables such as the cache size"),
15306 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
15307 0/*allow-unknown*/, &maintenance_show_cmdlist
);
15309 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
15310 &dwarf2_max_cache_age
, _("\
15311 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
15312 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
15313 A higher limit means that cached compilation units will be stored\n\
15314 in memory longer, and more total memory will be used. Zero disables\n\
15315 caching, which can slow down startup."),
15317 show_dwarf2_max_cache_age
,
15318 &set_dwarf2_cmdlist
,
15319 &show_dwarf2_cmdlist
);
15321 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
15322 &dwarf2_always_disassemble
, _("\
15323 Set whether `info address' always disassembles DWARF expressions."), _("\
15324 Show whether `info address' always disassembles DWARF expressions."), _("\
15325 When enabled, DWARF expressions are always printed in an assembly-like\n\
15326 syntax. When disabled, expressions will be printed in a more\n\
15327 conversational style, when possible."),
15329 show_dwarf2_always_disassemble
,
15330 &set_dwarf2_cmdlist
,
15331 &show_dwarf2_cmdlist
);
15333 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
15334 Set debugging of the dwarf2 DIE reader."), _("\
15335 Show debugging of the dwarf2 DIE reader."), _("\
15336 When enabled (non-zero), DIEs are dumped after they are read in.\n\
15337 The value is the maximum depth to print."),
15340 &setdebuglist
, &showdebuglist
);
15342 c
= add_cmd ("gdb-index", class_files
, save_gdb_index_command
,
15343 _("Save a .gdb-index file"),
15345 set_cmd_completer (c
, filename_completer
);