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"
56 #include "gdb_string.h"
57 #include "gdb_assert.h"
58 #include <sys/types.h>
65 #define MAP_FAILED ((void *) -1)
70 /* .debug_info header for a compilation unit
71 Because of alignment constraints, this structure has padding and cannot
72 be mapped directly onto the beginning of the .debug_info section. */
73 typedef struct comp_unit_header
75 unsigned int length
; /* length of the .debug_info
77 unsigned short version
; /* version number -- 2 for DWARF
79 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
80 unsigned char addr_size
; /* byte size of an address -- 4 */
83 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
86 /* .debug_line statement program prologue
87 Because of alignment constraints, this structure has padding and cannot
88 be mapped directly onto the beginning of the .debug_info section. */
89 typedef struct statement_prologue
91 unsigned int total_length
; /* byte length of the statement
93 unsigned short version
; /* version number -- 2 for DWARF
95 unsigned int prologue_length
; /* # bytes between prologue &
97 unsigned char minimum_instruction_length
; /* byte size of
99 unsigned char default_is_stmt
; /* initial value of is_stmt
102 unsigned char line_range
;
103 unsigned char opcode_base
; /* number assigned to first special
105 unsigned char *standard_opcode_lengths
;
109 /* When non-zero, dump DIEs after they are read in. */
110 static int dwarf2_die_debug
= 0;
114 /* When set, the file that we're processing is known to have debugging
115 info for C++ namespaces. GCC 3.3.x did not produce this information,
116 but later versions do. */
118 static int processing_has_namespace_info
;
120 static const struct objfile_data
*dwarf2_objfile_data_key
;
122 struct dwarf2_section_info
128 /* True if we have tried to read this section. */
132 struct dwarf2_per_objfile
134 struct dwarf2_section_info info
;
135 struct dwarf2_section_info abbrev
;
136 struct dwarf2_section_info line
;
137 struct dwarf2_section_info loc
;
138 struct dwarf2_section_info macinfo
;
139 struct dwarf2_section_info str
;
140 struct dwarf2_section_info ranges
;
141 struct dwarf2_section_info types
;
142 struct dwarf2_section_info frame
;
143 struct dwarf2_section_info eh_frame
;
146 struct objfile
*objfile
;
148 /* A list of all the compilation units. This is used to locate
149 the target compilation unit of a particular reference. */
150 struct dwarf2_per_cu_data
**all_comp_units
;
152 /* The number of compilation units in ALL_COMP_UNITS. */
155 /* A chain of compilation units that are currently read in, so that
156 they can be freed later. */
157 struct dwarf2_per_cu_data
*read_in_chain
;
159 /* A table mapping .debug_types signatures to its signatured_type entry.
160 This is NULL if the .debug_types section hasn't been read in yet. */
161 htab_t signatured_types
;
163 /* A flag indicating wether this objfile has a section loaded at a
165 int has_section_at_zero
;
168 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
170 /* names of the debugging sections */
172 /* Note that if the debugging section has been compressed, it might
173 have a name like .zdebug_info. */
175 #define INFO_SECTION "debug_info"
176 #define ABBREV_SECTION "debug_abbrev"
177 #define LINE_SECTION "debug_line"
178 #define LOC_SECTION "debug_loc"
179 #define MACINFO_SECTION "debug_macinfo"
180 #define STR_SECTION "debug_str"
181 #define RANGES_SECTION "debug_ranges"
182 #define TYPES_SECTION "debug_types"
183 #define FRAME_SECTION "debug_frame"
184 #define EH_FRAME_SECTION "eh_frame"
186 /* local data types */
188 /* We hold several abbreviation tables in memory at the same time. */
189 #ifndef ABBREV_HASH_SIZE
190 #define ABBREV_HASH_SIZE 121
193 /* The data in a compilation unit header, after target2host
194 translation, looks like this. */
195 struct comp_unit_head
199 unsigned char addr_size
;
200 unsigned char signed_addr_p
;
201 unsigned int abbrev_offset
;
203 /* Size of file offsets; either 4 or 8. */
204 unsigned int offset_size
;
206 /* Size of the length field; either 4 or 12. */
207 unsigned int initial_length_size
;
209 /* Offset to the first byte of this compilation unit header in the
210 .debug_info section, for resolving relative reference dies. */
213 /* Offset to first die in this cu from the start of the cu.
214 This will be the first byte following the compilation unit header. */
215 unsigned int first_die_offset
;
218 /* Internal state when decoding a particular compilation unit. */
221 /* The objfile containing this compilation unit. */
222 struct objfile
*objfile
;
224 /* The header of the compilation unit. */
225 struct comp_unit_head header
;
227 /* Base address of this compilation unit. */
228 CORE_ADDR base_address
;
230 /* Non-zero if base_address has been set. */
233 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
235 /* The language we are debugging. */
236 enum language language
;
237 const struct language_defn
*language_defn
;
239 const char *producer
;
241 /* The generic symbol table building routines have separate lists for
242 file scope symbols and all all other scopes (local scopes). So
243 we need to select the right one to pass to add_symbol_to_list().
244 We do it by keeping a pointer to the correct list in list_in_scope.
246 FIXME: The original dwarf code just treated the file scope as the
247 first local scope, and all other local scopes as nested local
248 scopes, and worked fine. Check to see if we really need to
249 distinguish these in buildsym.c. */
250 struct pending
**list_in_scope
;
252 /* DWARF abbreviation table associated with this compilation unit. */
253 struct abbrev_info
**dwarf2_abbrevs
;
255 /* Storage for the abbrev table. */
256 struct obstack abbrev_obstack
;
258 /* Hash table holding all the loaded partial DIEs. */
261 /* Storage for things with the same lifetime as this read-in compilation
262 unit, including partial DIEs. */
263 struct obstack comp_unit_obstack
;
265 /* When multiple dwarf2_cu structures are living in memory, this field
266 chains them all together, so that they can be released efficiently.
267 We will probably also want a generation counter so that most-recently-used
268 compilation units are cached... */
269 struct dwarf2_per_cu_data
*read_in_chain
;
271 /* Backchain to our per_cu entry if the tree has been built. */
272 struct dwarf2_per_cu_data
*per_cu
;
274 /* Pointer to the die -> type map. Although it is stored
275 permanently in per_cu, we copy it here to avoid double
279 /* How many compilation units ago was this CU last referenced? */
282 /* A hash table of die offsets for following references. */
285 /* Full DIEs if read in. */
286 struct die_info
*dies
;
288 /* A set of pointers to dwarf2_per_cu_data objects for compilation
289 units referenced by this one. Only set during full symbol processing;
290 partial symbol tables do not have dependencies. */
293 /* Header data from the line table, during full symbol processing. */
294 struct line_header
*line_header
;
296 /* Mark used when releasing cached dies. */
297 unsigned int mark
: 1;
299 /* This flag will be set if this compilation unit might include
300 inter-compilation-unit references. */
301 unsigned int has_form_ref_addr
: 1;
303 /* This flag will be set if this compilation unit includes any
304 DW_TAG_namespace DIEs. If we know that there are explicit
305 DIEs for namespaces, we don't need to try to infer them
306 from mangled names. */
307 unsigned int has_namespace_info
: 1;
310 /* Persistent data held for a compilation unit, even when not
311 processing it. We put a pointer to this structure in the
312 read_symtab_private field of the psymtab. If we encounter
313 inter-compilation-unit references, we also maintain a sorted
314 list of all compilation units. */
316 struct dwarf2_per_cu_data
318 /* The start offset and length of this compilation unit. 2**29-1
319 bytes should suffice to store the length of any compilation unit
320 - if it doesn't, GDB will fall over anyway.
321 NOTE: Unlike comp_unit_head.length, this length includes
322 initial_length_size. */
324 unsigned int length
: 29;
326 /* Flag indicating this compilation unit will be read in before
327 any of the current compilation units are processed. */
328 unsigned int queued
: 1;
330 /* This flag will be set if we need to load absolutely all DIEs
331 for this compilation unit, instead of just the ones we think
332 are interesting. It gets set if we look for a DIE in the
333 hash table and don't find it. */
334 unsigned int load_all_dies
: 1;
336 /* Non-zero if this CU is from .debug_types.
337 Otherwise it's from .debug_info. */
338 unsigned int from_debug_types
: 1;
340 /* Set to non-NULL iff this CU is currently loaded. When it gets freed out
341 of the CU cache it gets reset to NULL again. */
342 struct dwarf2_cu
*cu
;
344 /* If full symbols for this CU have been read in, then this field
345 holds a map of DIE offsets to types. It isn't always possible
346 to reconstruct this information later, so we have to preserve
350 /* The partial symbol table associated with this compilation unit,
351 or NULL for partial units (which do not have an associated
353 struct partial_symtab
*psymtab
;
356 /* Entry in the signatured_types hash table. */
358 struct signatured_type
362 /* Offset in .debug_types of the TU (type_unit) for this type. */
365 /* Offset in .debug_types of the type defined by this TU. */
366 unsigned int type_offset
;
368 /* The CU(/TU) of this type. */
369 struct dwarf2_per_cu_data per_cu
;
372 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
373 which are used for both .debug_info and .debug_types dies.
374 All parameters here are unchanging for the life of the call.
375 This struct exists to abstract away the constant parameters of
378 struct die_reader_specs
380 /* The bfd of this objfile. */
383 /* The CU of the DIE we are parsing. */
384 struct dwarf2_cu
*cu
;
386 /* Pointer to start of section buffer.
387 This is either the start of .debug_info or .debug_types. */
388 const gdb_byte
*buffer
;
391 /* The line number information for a compilation unit (found in the
392 .debug_line section) begins with a "statement program header",
393 which contains the following information. */
396 unsigned int total_length
;
397 unsigned short version
;
398 unsigned int header_length
;
399 unsigned char minimum_instruction_length
;
400 unsigned char maximum_ops_per_instruction
;
401 unsigned char default_is_stmt
;
403 unsigned char line_range
;
404 unsigned char opcode_base
;
406 /* standard_opcode_lengths[i] is the number of operands for the
407 standard opcode whose value is i. This means that
408 standard_opcode_lengths[0] is unused, and the last meaningful
409 element is standard_opcode_lengths[opcode_base - 1]. */
410 unsigned char *standard_opcode_lengths
;
412 /* The include_directories table. NOTE! These strings are not
413 allocated with xmalloc; instead, they are pointers into
414 debug_line_buffer. If you try to free them, `free' will get
416 unsigned int num_include_dirs
, include_dirs_size
;
419 /* The file_names table. NOTE! These strings are not allocated
420 with xmalloc; instead, they are pointers into debug_line_buffer.
421 Don't try to free them directly. */
422 unsigned int num_file_names
, file_names_size
;
426 unsigned int dir_index
;
427 unsigned int mod_time
;
429 int included_p
; /* Non-zero if referenced by the Line Number Program. */
430 struct symtab
*symtab
; /* The associated symbol table, if any. */
433 /* The start and end of the statement program following this
434 header. These point into dwarf2_per_objfile->line_buffer. */
435 gdb_byte
*statement_program_start
, *statement_program_end
;
438 /* When we construct a partial symbol table entry we only
439 need this much information. */
440 struct partial_die_info
442 /* Offset of this DIE. */
445 /* DWARF-2 tag for this DIE. */
446 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
448 /* Assorted flags describing the data found in this DIE. */
449 unsigned int has_children
: 1;
450 unsigned int is_external
: 1;
451 unsigned int is_declaration
: 1;
452 unsigned int has_type
: 1;
453 unsigned int has_specification
: 1;
454 unsigned int has_pc_info
: 1;
456 /* Flag set if the SCOPE field of this structure has been
458 unsigned int scope_set
: 1;
460 /* Flag set if the DIE has a byte_size attribute. */
461 unsigned int has_byte_size
: 1;
463 /* The name of this DIE. Normally the value of DW_AT_name, but
464 sometimes a default name for unnamed DIEs. */
467 /* The scope to prepend to our children. This is generally
468 allocated on the comp_unit_obstack, so will disappear
469 when this compilation unit leaves the cache. */
472 /* The location description associated with this DIE, if any. */
473 struct dwarf_block
*locdesc
;
475 /* If HAS_PC_INFO, the PC range associated with this DIE. */
479 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
480 DW_AT_sibling, if any. */
483 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
484 DW_AT_specification (or DW_AT_abstract_origin or
486 unsigned int spec_offset
;
488 /* Pointers to this DIE's parent, first child, and next sibling,
490 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
493 /* This data structure holds the information of an abbrev. */
496 unsigned int number
; /* number identifying abbrev */
497 enum dwarf_tag tag
; /* dwarf tag */
498 unsigned short has_children
; /* boolean */
499 unsigned short num_attrs
; /* number of attributes */
500 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
501 struct abbrev_info
*next
; /* next in chain */
506 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
507 ENUM_BITFIELD(dwarf_form
) form
: 16;
510 /* Attributes have a name and a value */
513 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
514 ENUM_BITFIELD(dwarf_form
) form
: 15;
516 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
517 field should be in u.str (existing only for DW_STRING) but it is kept
518 here for better struct attribute alignment. */
519 unsigned int string_is_canonical
: 1;
524 struct dwarf_block
*blk
;
528 struct signatured_type
*signatured_type
;
533 /* This data structure holds a complete die structure. */
536 /* DWARF-2 tag for this DIE. */
537 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
539 /* Number of attributes */
540 unsigned short num_attrs
;
545 /* Offset in .debug_info or .debug_types section. */
548 /* The dies in a compilation unit form an n-ary tree. PARENT
549 points to this die's parent; CHILD points to the first child of
550 this node; and all the children of a given node are chained
551 together via their SIBLING fields, terminated by a die whose
553 struct die_info
*child
; /* Its first child, if any. */
554 struct die_info
*sibling
; /* Its next sibling, if any. */
555 struct die_info
*parent
; /* Its parent, if any. */
557 /* An array of attributes, with NUM_ATTRS elements. There may be
558 zero, but it's not common and zero-sized arrays are not
559 sufficiently portable C. */
560 struct attribute attrs
[1];
563 struct function_range
566 CORE_ADDR lowpc
, highpc
;
568 struct function_range
*next
;
571 /* Get at parts of an attribute structure */
573 #define DW_STRING(attr) ((attr)->u.str)
574 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
575 #define DW_UNSND(attr) ((attr)->u.unsnd)
576 #define DW_BLOCK(attr) ((attr)->u.blk)
577 #define DW_SND(attr) ((attr)->u.snd)
578 #define DW_ADDR(attr) ((attr)->u.addr)
579 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
581 /* Blocks are a bunch of untyped bytes. */
588 #ifndef ATTR_ALLOC_CHUNK
589 #define ATTR_ALLOC_CHUNK 4
592 /* Allocate fields for structs, unions and enums in this size. */
593 #ifndef DW_FIELD_ALLOC_CHUNK
594 #define DW_FIELD_ALLOC_CHUNK 4
597 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
598 but this would require a corresponding change in unpack_field_as_long
600 static int bits_per_byte
= 8;
602 /* The routines that read and process dies for a C struct or C++ class
603 pass lists of data member fields and lists of member function fields
604 in an instance of a field_info structure, as defined below. */
607 /* List of data member and baseclasses fields. */
610 struct nextfield
*next
;
615 *fields
, *baseclasses
;
617 /* Number of fields (including baseclasses). */
620 /* Number of baseclasses. */
623 /* Set if the accesibility of one of the fields is not public. */
624 int non_public_fields
;
626 /* Member function fields array, entries are allocated in the order they
627 are encountered in the object file. */
630 struct nextfnfield
*next
;
631 struct fn_field fnfield
;
635 /* Member function fieldlist array, contains name of possibly overloaded
636 member function, number of overloaded member functions and a pointer
637 to the head of the member function field chain. */
642 struct nextfnfield
*head
;
646 /* Number of entries in the fnfieldlists array. */
649 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
650 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
651 struct typedef_field_list
653 struct typedef_field field
;
654 struct typedef_field_list
*next
;
657 unsigned typedef_field_list_count
;
660 /* One item on the queue of compilation units to read in full symbols
662 struct dwarf2_queue_item
664 struct dwarf2_per_cu_data
*per_cu
;
665 struct dwarf2_queue_item
*next
;
668 /* The current queue. */
669 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
671 /* Loaded secondary compilation units are kept in memory until they
672 have not been referenced for the processing of this many
673 compilation units. Set this to zero to disable caching. Cache
674 sizes of up to at least twenty will improve startup time for
675 typical inter-CU-reference binaries, at an obvious memory cost. */
676 static int dwarf2_max_cache_age
= 5;
678 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
679 struct cmd_list_element
*c
, const char *value
)
681 fprintf_filtered (file
, _("\
682 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
687 /* Various complaints about symbol reading that don't abort the process */
690 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
692 complaint (&symfile_complaints
,
693 _("statement list doesn't fit in .debug_line section"));
697 dwarf2_debug_line_missing_file_complaint (void)
699 complaint (&symfile_complaints
,
700 _(".debug_line section has line data without a file"));
704 dwarf2_debug_line_missing_end_sequence_complaint (void)
706 complaint (&symfile_complaints
,
707 _(".debug_line section has line program sequence without an end"));
711 dwarf2_complex_location_expr_complaint (void)
713 complaint (&symfile_complaints
, _("location expression too complex"));
717 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
720 complaint (&symfile_complaints
,
721 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
726 dwarf2_macros_too_long_complaint (void)
728 complaint (&symfile_complaints
,
729 _("macro info runs off end of `.debug_macinfo' section"));
733 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
735 complaint (&symfile_complaints
,
736 _("macro debug info contains a malformed macro definition:\n`%s'"),
741 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
743 complaint (&symfile_complaints
,
744 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
747 /* local function prototypes */
749 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
751 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
754 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
756 struct partial_symtab
*);
758 static void dwarf2_build_psymtabs_hard (struct objfile
*);
760 static void scan_partial_symbols (struct partial_die_info
*,
761 CORE_ADDR
*, CORE_ADDR
*,
762 int, struct dwarf2_cu
*);
764 static void add_partial_symbol (struct partial_die_info
*,
767 static void add_partial_namespace (struct partial_die_info
*pdi
,
768 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
769 int need_pc
, struct dwarf2_cu
*cu
);
771 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
772 CORE_ADDR
*highpc
, int need_pc
,
773 struct dwarf2_cu
*cu
);
775 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
776 struct dwarf2_cu
*cu
);
778 static void add_partial_subprogram (struct partial_die_info
*pdi
,
779 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
780 int need_pc
, struct dwarf2_cu
*cu
);
782 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
783 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
784 bfd
*abfd
, struct dwarf2_cu
*cu
);
786 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
788 static void psymtab_to_symtab_1 (struct partial_symtab
*);
790 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
792 static void dwarf2_free_abbrev_table (void *);
794 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
797 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
800 static struct partial_die_info
*load_partial_dies (bfd
*,
801 gdb_byte
*, gdb_byte
*,
802 int, struct dwarf2_cu
*);
804 static gdb_byte
*read_partial_die (struct partial_die_info
*,
805 struct abbrev_info
*abbrev
,
807 gdb_byte
*, gdb_byte
*,
810 static struct partial_die_info
*find_partial_die (unsigned int,
813 static void fixup_partial_die (struct partial_die_info
*,
816 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
817 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
819 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
820 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
822 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
824 static int read_1_signed_byte (bfd
*, gdb_byte
*);
826 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
828 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
830 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
832 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
835 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
837 static LONGEST read_checked_initial_length_and_offset
838 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
839 unsigned int *, unsigned int *);
841 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
844 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
846 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
848 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
850 static char *read_indirect_string (bfd
*, gdb_byte
*,
851 const struct comp_unit_head
*,
854 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
856 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
858 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
860 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
862 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
865 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
869 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
870 struct dwarf2_cu
*cu
);
872 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
874 static struct die_info
*die_specification (struct die_info
*die
,
875 struct dwarf2_cu
**);
877 static void free_line_header (struct line_header
*lh
);
879 static void add_file_name (struct line_header
*, char *, unsigned int,
880 unsigned int, unsigned int);
882 static struct line_header
*(dwarf_decode_line_header
883 (unsigned int offset
,
884 bfd
*abfd
, struct dwarf2_cu
*cu
));
886 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
887 struct dwarf2_cu
*, struct partial_symtab
*);
889 static void dwarf2_start_subfile (char *, char *, char *);
891 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
894 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
897 static void dwarf2_const_value_data (struct attribute
*attr
,
901 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
903 static int need_gnat_info (struct dwarf2_cu
*);
905 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
907 static void set_descriptive_type (struct type
*, struct die_info
*,
910 static struct type
*die_containing_type (struct die_info
*,
913 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
915 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
917 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
919 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
920 const char *suffix
, int physname
,
921 struct dwarf2_cu
*cu
);
923 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
925 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
927 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
929 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
931 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
932 struct dwarf2_cu
*, struct partial_symtab
*);
934 static int dwarf2_get_pc_bounds (struct die_info
*,
935 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
936 struct partial_symtab
*);
938 static void get_scope_pc_bounds (struct die_info
*,
939 CORE_ADDR
*, CORE_ADDR
*,
942 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
943 CORE_ADDR
, struct dwarf2_cu
*);
945 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
948 static void dwarf2_attach_fields_to_type (struct field_info
*,
949 struct type
*, struct dwarf2_cu
*);
951 static void dwarf2_add_member_fn (struct field_info
*,
952 struct die_info
*, struct type
*,
955 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
956 struct type
*, struct dwarf2_cu
*);
958 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
960 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
962 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
964 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
966 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
968 static struct type
*read_module_type (struct die_info
*die
,
969 struct dwarf2_cu
*cu
);
971 static const char *namespace_name (struct die_info
*die
,
972 int *is_anonymous
, struct dwarf2_cu
*);
974 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
976 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
978 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
981 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
983 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
985 gdb_byte
**new_info_ptr
,
986 struct die_info
*parent
);
988 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
990 gdb_byte
**new_info_ptr
,
991 struct die_info
*parent
);
993 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
995 gdb_byte
**new_info_ptr
,
996 struct die_info
*parent
);
998 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
999 struct die_info
**, gdb_byte
*,
1002 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1004 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1007 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1009 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1010 struct dwarf2_cu
**);
1012 static char *dwarf_tag_name (unsigned int);
1014 static char *dwarf_attr_name (unsigned int);
1016 static char *dwarf_form_name (unsigned int);
1018 static char *dwarf_bool_name (unsigned int);
1020 static char *dwarf_type_encoding_name (unsigned int);
1023 static char *dwarf_cfi_name (unsigned int);
1026 static struct die_info
*sibling_die (struct die_info
*);
1028 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1030 static void dump_die_for_error (struct die_info
*);
1032 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1035 /*static*/ void dump_die (struct die_info
*, int max_level
);
1037 static void store_in_ref_table (struct die_info
*,
1038 struct dwarf2_cu
*);
1040 static int is_ref_attr (struct attribute
*);
1042 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1044 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1046 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1048 struct dwarf2_cu
**);
1050 static struct die_info
*follow_die_ref (struct die_info
*,
1052 struct dwarf2_cu
**);
1054 static struct die_info
*follow_die_sig (struct die_info
*,
1056 struct dwarf2_cu
**);
1058 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1059 unsigned int offset
);
1061 static void read_signatured_type (struct objfile
*,
1062 struct signatured_type
*type_sig
);
1064 /* memory allocation interface */
1066 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1068 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1070 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1072 static void initialize_cu_func_list (struct dwarf2_cu
*);
1074 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1075 struct dwarf2_cu
*);
1077 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1078 char *, bfd
*, struct dwarf2_cu
*);
1080 static int attr_form_is_block (struct attribute
*);
1082 static int attr_form_is_section_offset (struct attribute
*);
1084 static int attr_form_is_constant (struct attribute
*);
1086 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1088 struct dwarf2_cu
*cu
);
1090 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1091 struct abbrev_info
*abbrev
,
1092 struct dwarf2_cu
*cu
);
1094 static void free_stack_comp_unit (void *);
1096 static hashval_t
partial_die_hash (const void *item
);
1098 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1100 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1101 (unsigned int offset
, struct objfile
*objfile
);
1103 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1104 (unsigned int offset
, struct objfile
*objfile
);
1106 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1108 static void free_one_comp_unit (void *);
1110 static void free_cached_comp_units (void *);
1112 static void age_cached_comp_units (void);
1114 static void free_one_cached_comp_unit (void *);
1116 static struct type
*set_die_type (struct die_info
*, struct type
*,
1117 struct dwarf2_cu
*);
1119 static void create_all_comp_units (struct objfile
*);
1121 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1124 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1126 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1127 struct dwarf2_per_cu_data
*);
1129 static void dwarf2_mark (struct dwarf2_cu
*);
1131 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1133 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1135 /* Try to locate the sections we need for DWARF 2 debugging
1136 information and return true if we have enough to do something. */
1139 dwarf2_has_info (struct objfile
*objfile
)
1141 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1142 if (!dwarf2_per_objfile
)
1144 /* Initialize per-objfile state. */
1145 struct dwarf2_per_objfile
*data
1146 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1148 memset (data
, 0, sizeof (*data
));
1149 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1150 dwarf2_per_objfile
= data
;
1152 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1153 dwarf2_per_objfile
->objfile
= objfile
;
1155 return (dwarf2_per_objfile
->info
.asection
!= NULL
1156 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1159 /* When loading sections, we can either look for ".<name>", or for
1160 * ".z<name>", which indicates a compressed section. */
1163 section_is_p (const char *section_name
, const char *name
)
1165 return (section_name
[0] == '.'
1166 && (strcmp (section_name
+ 1, name
) == 0
1167 || (section_name
[1] == 'z'
1168 && strcmp (section_name
+ 2, name
) == 0)));
1171 /* This function is mapped across the sections and remembers the
1172 offset and size of each of the debugging sections we are interested
1176 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1178 if (section_is_p (sectp
->name
, INFO_SECTION
))
1180 dwarf2_per_objfile
->info
.asection
= sectp
;
1181 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1183 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1185 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1186 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1188 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1190 dwarf2_per_objfile
->line
.asection
= sectp
;
1191 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1193 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1195 dwarf2_per_objfile
->loc
.asection
= sectp
;
1196 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1198 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1200 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1201 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1203 else if (section_is_p (sectp
->name
, STR_SECTION
))
1205 dwarf2_per_objfile
->str
.asection
= sectp
;
1206 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1208 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1210 dwarf2_per_objfile
->frame
.asection
= sectp
;
1211 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1213 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1215 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1217 if (aflag
& SEC_HAS_CONTENTS
)
1219 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1220 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1223 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1225 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1226 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1228 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1230 dwarf2_per_objfile
->types
.asection
= sectp
;
1231 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1234 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1235 && bfd_section_vma (abfd
, sectp
) == 0)
1236 dwarf2_per_objfile
->has_section_at_zero
= 1;
1239 /* Decompress a section that was compressed using zlib. Store the
1240 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1243 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1244 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1246 bfd
*abfd
= objfile
->obfd
;
1248 error (_("Support for zlib-compressed DWARF data (from '%s') "
1249 "is disabled in this copy of GDB"),
1250 bfd_get_filename (abfd
));
1252 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1253 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1254 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1255 bfd_size_type uncompressed_size
;
1256 gdb_byte
*uncompressed_buffer
;
1259 int header_size
= 12;
1261 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1262 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1263 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1264 bfd_get_filename (abfd
));
1266 /* Read the zlib header. In this case, it should be "ZLIB" followed
1267 by the uncompressed section size, 8 bytes in big-endian order. */
1268 if (compressed_size
< header_size
1269 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1270 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1271 bfd_get_filename (abfd
));
1272 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1273 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1274 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1275 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1276 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1277 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1278 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1279 uncompressed_size
+= compressed_buffer
[11];
1281 /* It is possible the section consists of several compressed
1282 buffers concatenated together, so we uncompress in a loop. */
1286 strm
.avail_in
= compressed_size
- header_size
;
1287 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1288 strm
.avail_out
= uncompressed_size
;
1289 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1291 rc
= inflateInit (&strm
);
1292 while (strm
.avail_in
> 0)
1295 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1296 bfd_get_filename (abfd
), rc
);
1297 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1298 + (uncompressed_size
- strm
.avail_out
));
1299 rc
= inflate (&strm
, Z_FINISH
);
1300 if (rc
!= Z_STREAM_END
)
1301 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1302 bfd_get_filename (abfd
), rc
);
1303 rc
= inflateReset (&strm
);
1305 rc
= inflateEnd (&strm
);
1307 || strm
.avail_out
!= 0)
1308 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1309 bfd_get_filename (abfd
), rc
);
1311 do_cleanups (cleanup
);
1312 *outbuf
= uncompressed_buffer
;
1313 *outsize
= uncompressed_size
;
1317 /* Read the contents of the section SECTP from object file specified by
1318 OBJFILE, store info about the section into INFO.
1319 If the section is compressed, uncompress it before returning. */
1322 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1324 bfd
*abfd
= objfile
->obfd
;
1325 asection
*sectp
= info
->asection
;
1326 gdb_byte
*buf
, *retbuf
;
1327 unsigned char header
[4];
1331 info
->buffer
= NULL
;
1332 info
->was_mmapped
= 0;
1335 if (info
->asection
== NULL
|| info
->size
== 0)
1338 /* Check if the file has a 4-byte header indicating compression. */
1339 if (info
->size
> sizeof (header
)
1340 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1341 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1343 /* Upon decompression, update the buffer and its size. */
1344 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1346 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1354 pagesize
= getpagesize ();
1356 /* Only try to mmap sections which are large enough: we don't want to
1357 waste space due to fragmentation. Also, only try mmap for sections
1358 without relocations. */
1360 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1362 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1363 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1364 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1365 MAP_PRIVATE
, pg_offset
);
1367 if (retbuf
!= MAP_FAILED
)
1369 info
->was_mmapped
= 1;
1370 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1371 #if HAVE_POSIX_MADVISE
1372 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1379 /* If we get here, we are a normal, not-compressed section. */
1381 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1383 /* When debugging .o files, we may need to apply relocations; see
1384 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1385 We never compress sections in .o files, so we only need to
1386 try this when the section is not compressed. */
1387 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1390 info
->buffer
= retbuf
;
1394 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1395 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1396 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1397 bfd_get_filename (abfd
));
1400 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1404 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1405 asection
**sectp
, gdb_byte
**bufp
,
1406 bfd_size_type
*sizep
)
1408 struct dwarf2_per_objfile
*data
1409 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1410 struct dwarf2_section_info
*info
;
1412 /* We may see an objfile without any DWARF, in which case we just
1421 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1422 info
= &data
->eh_frame
;
1423 else if (section_is_p (section_name
, FRAME_SECTION
))
1424 info
= &data
->frame
;
1428 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1429 /* We haven't read this section in yet. Do it now. */
1430 dwarf2_read_section (objfile
, info
);
1432 *sectp
= info
->asection
;
1433 *bufp
= info
->buffer
;
1434 *sizep
= info
->size
;
1437 /* Build a partial symbol table. */
1440 dwarf2_build_psymtabs (struct objfile
*objfile
)
1442 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
1444 init_psymbol_list (objfile
, 1024);
1447 dwarf2_build_psymtabs_hard (objfile
);
1450 /* Return TRUE if OFFSET is within CU_HEADER. */
1453 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1455 unsigned int bottom
= cu_header
->offset
;
1456 unsigned int top
= (cu_header
->offset
1458 + cu_header
->initial_length_size
);
1460 return (offset
>= bottom
&& offset
< top
);
1463 /* Read in the comp unit header information from the debug_info at info_ptr.
1464 NOTE: This leaves members offset, first_die_offset to be filled in
1468 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1469 gdb_byte
*info_ptr
, bfd
*abfd
)
1472 unsigned int bytes_read
;
1474 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1475 cu_header
->initial_length_size
= bytes_read
;
1476 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1477 info_ptr
+= bytes_read
;
1478 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1480 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1482 info_ptr
+= bytes_read
;
1483 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1485 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1486 if (signed_addr
< 0)
1487 internal_error (__FILE__
, __LINE__
,
1488 _("read_comp_unit_head: dwarf from non elf file"));
1489 cu_header
->signed_addr_p
= signed_addr
;
1495 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1496 gdb_byte
*buffer
, unsigned int buffer_size
,
1499 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1501 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1503 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
1504 error (_("Dwarf Error: wrong version in compilation unit header "
1505 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
1506 bfd_get_filename (abfd
));
1508 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1509 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1510 "(offset 0x%lx + 6) [in module %s]"),
1511 (long) header
->abbrev_offset
,
1512 (long) (beg_of_comp_unit
- buffer
),
1513 bfd_get_filename (abfd
));
1515 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1516 > buffer
+ buffer_size
)
1517 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1518 "(offset 0x%lx + 0) [in module %s]"),
1519 (long) header
->length
,
1520 (long) (beg_of_comp_unit
- buffer
),
1521 bfd_get_filename (abfd
));
1526 /* Read in the types comp unit header information from .debug_types entry at
1527 types_ptr. The result is a pointer to one past the end of the header. */
1530 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
1531 ULONGEST
*signature
,
1532 gdb_byte
*types_ptr
, bfd
*abfd
)
1534 gdb_byte
*initial_types_ptr
= types_ptr
;
1536 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
1537 &dwarf2_per_objfile
->types
);
1538 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
1540 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
1542 *signature
= read_8_bytes (abfd
, types_ptr
);
1544 types_ptr
+= cu_header
->offset_size
;
1545 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
1550 /* Allocate a new partial symtab for file named NAME and mark this new
1551 partial symtab as being an include of PST. */
1554 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1555 struct objfile
*objfile
)
1557 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1559 subpst
->section_offsets
= pst
->section_offsets
;
1560 subpst
->textlow
= 0;
1561 subpst
->texthigh
= 0;
1563 subpst
->dependencies
= (struct partial_symtab
**)
1564 obstack_alloc (&objfile
->objfile_obstack
,
1565 sizeof (struct partial_symtab
*));
1566 subpst
->dependencies
[0] = pst
;
1567 subpst
->number_of_dependencies
= 1;
1569 subpst
->globals_offset
= 0;
1570 subpst
->n_global_syms
= 0;
1571 subpst
->statics_offset
= 0;
1572 subpst
->n_static_syms
= 0;
1573 subpst
->symtab
= NULL
;
1574 subpst
->read_symtab
= pst
->read_symtab
;
1577 /* No private part is necessary for include psymtabs. This property
1578 can be used to differentiate between such include psymtabs and
1579 the regular ones. */
1580 subpst
->read_symtab_private
= NULL
;
1583 /* Read the Line Number Program data and extract the list of files
1584 included by the source file represented by PST. Build an include
1585 partial symtab for each of these included files. */
1588 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1589 struct die_info
*die
,
1590 struct partial_symtab
*pst
)
1592 struct objfile
*objfile
= cu
->objfile
;
1593 bfd
*abfd
= objfile
->obfd
;
1594 struct line_header
*lh
= NULL
;
1595 struct attribute
*attr
;
1597 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
1600 unsigned int line_offset
= DW_UNSND (attr
);
1602 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
1605 return; /* No linetable, so no includes. */
1607 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1609 free_line_header (lh
);
1613 hash_type_signature (const void *item
)
1615 const struct signatured_type
*type_sig
= item
;
1617 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1618 return type_sig
->signature
;
1622 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
1624 const struct signatured_type
*lhs
= item_lhs
;
1625 const struct signatured_type
*rhs
= item_rhs
;
1627 return lhs
->signature
== rhs
->signature
;
1630 /* Create the hash table of all entries in the .debug_types section.
1631 The result is zero if there is an error (e.g. missing .debug_types section),
1632 otherwise non-zero. */
1635 create_debug_types_hash_table (struct objfile
*objfile
)
1640 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
1641 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
1643 if (info_ptr
== NULL
)
1645 dwarf2_per_objfile
->signatured_types
= NULL
;
1649 types_htab
= htab_create_alloc_ex (41,
1650 hash_type_signature
,
1653 &objfile
->objfile_obstack
,
1654 hashtab_obstack_allocate
,
1655 dummy_obstack_deallocate
);
1657 if (dwarf2_die_debug
)
1658 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
1660 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1662 unsigned int offset
;
1663 unsigned int offset_size
;
1664 unsigned int type_offset
;
1665 unsigned int length
, initial_length_size
;
1666 unsigned short version
;
1668 struct signatured_type
*type_sig
;
1670 gdb_byte
*ptr
= info_ptr
;
1672 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
1674 /* We need to read the type's signature in order to build the hash
1675 table, but we don't need to read anything else just yet. */
1677 /* Sanity check to ensure entire cu is present. */
1678 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
1679 if (ptr
+ length
+ initial_length_size
1680 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1682 complaint (&symfile_complaints
,
1683 _("debug type entry runs off end of `.debug_types' section, ignored"));
1687 offset_size
= initial_length_size
== 4 ? 4 : 8;
1688 ptr
+= initial_length_size
;
1689 version
= bfd_get_16 (objfile
->obfd
, ptr
);
1691 ptr
+= offset_size
; /* abbrev offset */
1692 ptr
+= 1; /* address size */
1693 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
1695 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
1697 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
1698 memset (type_sig
, 0, sizeof (*type_sig
));
1699 type_sig
->signature
= signature
;
1700 type_sig
->offset
= offset
;
1701 type_sig
->type_offset
= type_offset
;
1703 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
1704 gdb_assert (slot
!= NULL
);
1707 if (dwarf2_die_debug
)
1708 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
1709 offset
, phex (signature
, sizeof (signature
)));
1711 info_ptr
= info_ptr
+ initial_length_size
+ length
;
1714 dwarf2_per_objfile
->signatured_types
= types_htab
;
1719 /* Lookup a signature based type.
1720 Returns NULL if SIG is not present in the table. */
1722 static struct signatured_type
*
1723 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
1725 struct signatured_type find_entry
, *entry
;
1727 if (dwarf2_per_objfile
->signatured_types
== NULL
)
1729 complaint (&symfile_complaints
,
1730 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1734 find_entry
.signature
= sig
;
1735 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
1739 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1742 init_cu_die_reader (struct die_reader_specs
*reader
,
1743 struct dwarf2_cu
*cu
)
1745 reader
->abfd
= cu
->objfile
->obfd
;
1747 if (cu
->per_cu
->from_debug_types
)
1749 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1750 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
1754 gdb_assert (dwarf2_per_objfile
->info
.readin
);
1755 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
1759 /* Find the base address of the compilation unit for range lists and
1760 location lists. It will normally be specified by DW_AT_low_pc.
1761 In DWARF-3 draft 4, the base address could be overridden by
1762 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1763 compilation units with discontinuous ranges. */
1766 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
1768 struct attribute
*attr
;
1771 cu
->base_address
= 0;
1773 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
1776 cu
->base_address
= DW_ADDR (attr
);
1781 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
1784 cu
->base_address
= DW_ADDR (attr
);
1790 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1791 to combine the common parts.
1792 Process a compilation unit for a psymtab.
1793 BUFFER is a pointer to the beginning of the dwarf section buffer,
1794 either .debug_info or debug_types.
1795 INFO_PTR is a pointer to the start of the CU.
1796 Returns a pointer to the next CU. */
1799 process_psymtab_comp_unit (struct objfile
*objfile
,
1800 struct dwarf2_per_cu_data
*this_cu
,
1801 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1802 unsigned int buffer_size
)
1804 bfd
*abfd
= objfile
->obfd
;
1805 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1806 struct die_info
*comp_unit_die
;
1807 struct partial_symtab
*pst
;
1809 struct cleanup
*back_to_inner
;
1810 struct dwarf2_cu cu
;
1811 int has_children
, has_pc_info
;
1812 struct attribute
*attr
;
1813 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
1814 struct die_reader_specs reader_specs
;
1816 memset (&cu
, 0, sizeof (cu
));
1817 cu
.objfile
= objfile
;
1818 obstack_init (&cu
.comp_unit_obstack
);
1820 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1822 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
1823 buffer
, buffer_size
,
1826 /* Complete the cu_header. */
1827 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
1828 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1830 cu
.list_in_scope
= &file_symbols
;
1832 /* If this compilation unit was already read in, free the
1833 cached copy in order to read it in again. This is
1834 necessary because we skipped some symbols when we first
1835 read in the compilation unit (see load_partial_dies).
1836 This problem could be avoided, but the benefit is
1838 if (this_cu
->cu
!= NULL
)
1839 free_one_cached_comp_unit (this_cu
->cu
);
1841 /* Note that this is a pointer to our stack frame, being
1842 added to a global data structure. It will be cleaned up
1843 in free_stack_comp_unit when we finish with this
1844 compilation unit. */
1846 cu
.per_cu
= this_cu
;
1848 /* Read the abbrevs for this compilation unit into a table. */
1849 dwarf2_read_abbrevs (abfd
, &cu
);
1850 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1852 /* Read the compilation unit die. */
1853 if (this_cu
->from_debug_types
)
1854 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1855 init_cu_die_reader (&reader_specs
, &cu
);
1856 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1859 if (this_cu
->from_debug_types
)
1861 /* offset,length haven't been set yet for type units. */
1862 this_cu
->offset
= cu
.header
.offset
;
1863 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1865 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1867 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1868 + cu
.header
.initial_length_size
);
1869 do_cleanups (back_to_inner
);
1873 /* Set the language we're debugging. */
1874 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1876 set_cu_language (DW_UNSND (attr
), &cu
);
1878 set_cu_language (language_minimal
, &cu
);
1880 /* Allocate a new partial symbol table structure. */
1881 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1882 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1883 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1884 /* TEXTLOW and TEXTHIGH are set below. */
1886 objfile
->global_psymbols
.next
,
1887 objfile
->static_psymbols
.next
);
1889 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1891 pst
->dirname
= DW_STRING (attr
);
1893 pst
->read_symtab_private
= this_cu
;
1895 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1897 /* Store the function that reads in the rest of the symbol table */
1898 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1900 this_cu
->psymtab
= pst
;
1902 dwarf2_find_base_address (comp_unit_die
, &cu
);
1904 /* Possibly set the default values of LOWPC and HIGHPC from
1906 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1907 &best_highpc
, &cu
, pst
);
1908 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1909 /* Store the contiguous range if it is not empty; it can be empty for
1910 CUs with no code. */
1911 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1912 best_lowpc
+ baseaddr
,
1913 best_highpc
+ baseaddr
- 1, pst
);
1915 /* Check if comp unit has_children.
1916 If so, read the rest of the partial symbols from this comp unit.
1917 If not, there's no more debug_info for this comp unit. */
1920 struct partial_die_info
*first_die
;
1921 CORE_ADDR lowpc
, highpc
;
1923 lowpc
= ((CORE_ADDR
) -1);
1924 highpc
= ((CORE_ADDR
) 0);
1926 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1928 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1929 ! has_pc_info
, &cu
);
1931 /* If we didn't find a lowpc, set it to highpc to avoid
1932 complaints from `maint check'. */
1933 if (lowpc
== ((CORE_ADDR
) -1))
1936 /* If the compilation unit didn't have an explicit address range,
1937 then use the information extracted from its child dies. */
1941 best_highpc
= highpc
;
1944 pst
->textlow
= best_lowpc
+ baseaddr
;
1945 pst
->texthigh
= best_highpc
+ baseaddr
;
1947 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1948 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1949 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1950 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1951 sort_pst_symbols (pst
);
1953 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1954 + cu
.header
.initial_length_size
);
1956 if (this_cu
->from_debug_types
)
1958 /* It's not clear we want to do anything with stmt lists here.
1959 Waiting to see what gcc ultimately does. */
1963 /* Get the list of files included in the current compilation unit,
1964 and build a psymtab for each of them. */
1965 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
1968 do_cleanups (back_to_inner
);
1973 /* Traversal function for htab_traverse_noresize.
1974 Process one .debug_types comp-unit. */
1977 process_type_comp_unit (void **slot
, void *info
)
1979 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
1980 struct objfile
*objfile
= (struct objfile
*) info
;
1981 struct dwarf2_per_cu_data
*this_cu
;
1983 this_cu
= &entry
->per_cu
;
1984 this_cu
->from_debug_types
= 1;
1986 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1987 process_psymtab_comp_unit (objfile
, this_cu
,
1988 dwarf2_per_objfile
->types
.buffer
,
1989 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
1990 dwarf2_per_objfile
->types
.size
);
1995 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
1996 Build partial symbol tables for the .debug_types comp-units. */
1999 build_type_psymtabs (struct objfile
*objfile
)
2001 if (! create_debug_types_hash_table (objfile
))
2004 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
2005 process_type_comp_unit
, objfile
);
2008 /* A cleanup function that clears objfile's psymtabs_addrmap field. */
2011 psymtabs_addrmap_cleanup (void *o
)
2013 struct objfile
*objfile
= o
;
2015 objfile
->psymtabs_addrmap
= NULL
;
2018 /* Build the partial symbol table by doing a quick pass through the
2019 .debug_info and .debug_abbrev sections. */
2022 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
2025 struct cleanup
*back_to
, *addrmap_cleanup
;
2026 struct obstack temp_obstack
;
2028 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2029 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2031 /* Any cached compilation units will be linked by the per-objfile
2032 read_in_chain. Make sure to free them when we're done. */
2033 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2035 build_type_psymtabs (objfile
);
2037 create_all_comp_units (objfile
);
2039 /* Create a temporary address map on a temporary obstack. We later
2040 copy this to the final obstack. */
2041 obstack_init (&temp_obstack
);
2042 make_cleanup_obstack_free (&temp_obstack
);
2043 objfile
->psymtabs_addrmap
= addrmap_create_mutable (&temp_obstack
);
2044 addrmap_cleanup
= make_cleanup (psymtabs_addrmap_cleanup
, objfile
);
2046 /* Since the objects we're extracting from .debug_info vary in
2047 length, only the individual functions to extract them (like
2048 read_comp_unit_head and load_partial_die) can really know whether
2049 the buffer is large enough to hold another complete object.
2051 At the moment, they don't actually check that. If .debug_info
2052 holds just one extra byte after the last compilation unit's dies,
2053 then read_comp_unit_head will happily read off the end of the
2054 buffer. read_partial_die is similarly casual. Those functions
2057 For this loop condition, simply checking whether there's any data
2058 left at all should be sufficient. */
2060 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2061 + dwarf2_per_objfile
->info
.size
))
2063 struct dwarf2_per_cu_data
*this_cu
;
2065 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2068 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2069 dwarf2_per_objfile
->info
.buffer
,
2071 dwarf2_per_objfile
->info
.size
);
2074 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2075 &objfile
->objfile_obstack
);
2076 discard_cleanups (addrmap_cleanup
);
2078 do_cleanups (back_to
);
2081 /* Load the partial DIEs for a secondary CU into memory. */
2084 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2085 struct objfile
*objfile
)
2087 bfd
*abfd
= objfile
->obfd
;
2088 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2089 struct die_info
*comp_unit_die
;
2090 struct dwarf2_cu
*cu
;
2091 struct cleanup
*back_to
;
2092 struct attribute
*attr
;
2094 struct die_reader_specs reader_specs
;
2096 gdb_assert (! this_cu
->from_debug_types
);
2098 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2099 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2100 beg_of_comp_unit
= info_ptr
;
2102 cu
= alloc_one_comp_unit (objfile
);
2104 /* ??? Missing cleanup for CU? */
2106 /* Link this compilation unit into the compilation unit tree. */
2108 cu
->per_cu
= this_cu
;
2109 cu
->type_hash
= this_cu
->type_hash
;
2111 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2112 dwarf2_per_objfile
->info
.buffer
,
2113 dwarf2_per_objfile
->info
.size
,
2116 /* Complete the cu_header. */
2117 cu
->header
.offset
= this_cu
->offset
;
2118 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2120 /* Read the abbrevs for this compilation unit into a table. */
2121 dwarf2_read_abbrevs (abfd
, cu
);
2122 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2124 /* Read the compilation unit die. */
2125 init_cu_die_reader (&reader_specs
, cu
);
2126 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2129 /* Set the language we're debugging. */
2130 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2132 set_cu_language (DW_UNSND (attr
), cu
);
2134 set_cu_language (language_minimal
, cu
);
2136 /* Check if comp unit has_children.
2137 If so, read the rest of the partial symbols from this comp unit.
2138 If not, there's no more debug_info for this comp unit. */
2140 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2142 do_cleanups (back_to
);
2145 /* Create a list of all compilation units in OBJFILE. We do this only
2146 if an inter-comp-unit reference is found; presumably if there is one,
2147 there will be many, and one will occur early in the .debug_info section.
2148 So there's no point in building this list incrementally. */
2151 create_all_comp_units (struct objfile
*objfile
)
2155 struct dwarf2_per_cu_data
**all_comp_units
;
2158 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2159 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2163 all_comp_units
= xmalloc (n_allocated
2164 * sizeof (struct dwarf2_per_cu_data
*));
2166 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2168 unsigned int length
, initial_length_size
;
2169 struct dwarf2_per_cu_data
*this_cu
;
2170 unsigned int offset
;
2172 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2174 /* Read just enough information to find out where the next
2175 compilation unit is. */
2176 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2177 &initial_length_size
);
2179 /* Save the compilation unit for later lookup. */
2180 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2181 sizeof (struct dwarf2_per_cu_data
));
2182 memset (this_cu
, 0, sizeof (*this_cu
));
2183 this_cu
->offset
= offset
;
2184 this_cu
->length
= length
+ initial_length_size
;
2186 if (n_comp_units
== n_allocated
)
2189 all_comp_units
= xrealloc (all_comp_units
,
2191 * sizeof (struct dwarf2_per_cu_data
*));
2193 all_comp_units
[n_comp_units
++] = this_cu
;
2195 info_ptr
= info_ptr
+ this_cu
->length
;
2198 dwarf2_per_objfile
->all_comp_units
2199 = obstack_alloc (&objfile
->objfile_obstack
,
2200 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2201 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2202 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2203 xfree (all_comp_units
);
2204 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2207 /* Process all loaded DIEs for compilation unit CU, starting at
2208 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2209 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2210 DW_AT_ranges). If NEED_PC is set, then this function will set
2211 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2212 and record the covered ranges in the addrmap. */
2215 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2216 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2218 struct partial_die_info
*pdi
;
2220 /* Now, march along the PDI's, descending into ones which have
2221 interesting children but skipping the children of the other ones,
2222 until we reach the end of the compilation unit. */
2228 fixup_partial_die (pdi
, cu
);
2230 /* Anonymous namespaces or modules have no name but have interesting
2231 children, so we need to look at them. Ditto for anonymous
2234 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2235 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
)
2239 case DW_TAG_subprogram
:
2240 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2242 case DW_TAG_variable
:
2243 case DW_TAG_typedef
:
2244 case DW_TAG_union_type
:
2245 if (!pdi
->is_declaration
)
2247 add_partial_symbol (pdi
, cu
);
2250 case DW_TAG_class_type
:
2251 case DW_TAG_interface_type
:
2252 case DW_TAG_structure_type
:
2253 if (!pdi
->is_declaration
)
2255 add_partial_symbol (pdi
, cu
);
2258 case DW_TAG_enumeration_type
:
2259 if (!pdi
->is_declaration
)
2260 add_partial_enumeration (pdi
, cu
);
2262 case DW_TAG_base_type
:
2263 case DW_TAG_subrange_type
:
2264 /* File scope base type definitions are added to the partial
2266 add_partial_symbol (pdi
, cu
);
2268 case DW_TAG_namespace
:
2269 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2272 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2279 /* If the die has a sibling, skip to the sibling. */
2281 pdi
= pdi
->die_sibling
;
2285 /* Functions used to compute the fully scoped name of a partial DIE.
2287 Normally, this is simple. For C++, the parent DIE's fully scoped
2288 name is concatenated with "::" and the partial DIE's name. For
2289 Java, the same thing occurs except that "." is used instead of "::".
2290 Enumerators are an exception; they use the scope of their parent
2291 enumeration type, i.e. the name of the enumeration type is not
2292 prepended to the enumerator.
2294 There are two complexities. One is DW_AT_specification; in this
2295 case "parent" means the parent of the target of the specification,
2296 instead of the direct parent of the DIE. The other is compilers
2297 which do not emit DW_TAG_namespace; in this case we try to guess
2298 the fully qualified name of structure types from their members'
2299 linkage names. This must be done using the DIE's children rather
2300 than the children of any DW_AT_specification target. We only need
2301 to do this for structures at the top level, i.e. if the target of
2302 any DW_AT_specification (if any; otherwise the DIE itself) does not
2305 /* Compute the scope prefix associated with PDI's parent, in
2306 compilation unit CU. The result will be allocated on CU's
2307 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2308 field. NULL is returned if no prefix is necessary. */
2310 partial_die_parent_scope (struct partial_die_info
*pdi
,
2311 struct dwarf2_cu
*cu
)
2313 char *grandparent_scope
;
2314 struct partial_die_info
*parent
, *real_pdi
;
2316 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2317 then this means the parent of the specification DIE. */
2320 while (real_pdi
->has_specification
)
2321 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2323 parent
= real_pdi
->die_parent
;
2327 if (parent
->scope_set
)
2328 return parent
->scope
;
2330 fixup_partial_die (parent
, cu
);
2332 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2334 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
2335 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
2336 Work around this problem here. */
2337 if (cu
->language
== language_cplus
2338 && parent
->tag
== DW_TAG_namespace
2339 && strcmp (parent
->name
, "::") == 0
2340 && grandparent_scope
== NULL
)
2342 parent
->scope
= NULL
;
2343 parent
->scope_set
= 1;
2347 if (parent
->tag
== DW_TAG_namespace
2348 || parent
->tag
== DW_TAG_module
2349 || parent
->tag
== DW_TAG_structure_type
2350 || parent
->tag
== DW_TAG_class_type
2351 || parent
->tag
== DW_TAG_interface_type
2352 || parent
->tag
== DW_TAG_union_type
2353 || parent
->tag
== DW_TAG_enumeration_type
)
2355 if (grandparent_scope
== NULL
)
2356 parent
->scope
= parent
->name
;
2358 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2359 parent
->name
, 0, cu
);
2361 else if (parent
->tag
== DW_TAG_enumerator
)
2362 /* Enumerators should not get the name of the enumeration as a prefix. */
2363 parent
->scope
= grandparent_scope
;
2366 /* FIXME drow/2004-04-01: What should we be doing with
2367 function-local names? For partial symbols, we should probably be
2369 complaint (&symfile_complaints
,
2370 _("unhandled containing DIE tag %d for DIE at %d"),
2371 parent
->tag
, pdi
->offset
);
2372 parent
->scope
= grandparent_scope
;
2375 parent
->scope_set
= 1;
2376 return parent
->scope
;
2379 /* Return the fully scoped name associated with PDI, from compilation unit
2380 CU. The result will be allocated with malloc. */
2382 partial_die_full_name (struct partial_die_info
*pdi
,
2383 struct dwarf2_cu
*cu
)
2387 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2388 if (parent_scope
== NULL
)
2391 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
2395 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2397 struct objfile
*objfile
= cu
->objfile
;
2399 char *actual_name
= NULL
;
2400 const struct partial_symbol
*psym
= NULL
;
2402 int built_actual_name
= 0;
2404 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2406 actual_name
= partial_die_full_name (pdi
, cu
);
2408 built_actual_name
= 1;
2410 if (actual_name
== NULL
)
2411 actual_name
= pdi
->name
;
2415 case DW_TAG_subprogram
:
2416 if (pdi
->is_external
|| cu
->language
== language_ada
)
2418 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2419 of the global scope. But in Ada, we want to be able to access
2420 nested procedures globally. So all Ada subprograms are stored
2421 in the global scope. */
2422 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2423 mst_text, objfile); */
2424 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2426 VAR_DOMAIN
, LOC_BLOCK
,
2427 &objfile
->global_psymbols
,
2428 0, pdi
->lowpc
+ baseaddr
,
2429 cu
->language
, objfile
);
2433 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2434 mst_file_text, objfile); */
2435 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2437 VAR_DOMAIN
, LOC_BLOCK
,
2438 &objfile
->static_psymbols
,
2439 0, pdi
->lowpc
+ baseaddr
,
2440 cu
->language
, objfile
);
2443 case DW_TAG_variable
:
2444 if (pdi
->is_external
)
2447 Don't enter into the minimal symbol tables as there is
2448 a minimal symbol table entry from the ELF symbols already.
2449 Enter into partial symbol table if it has a location
2450 descriptor or a type.
2451 If the location descriptor is missing, new_symbol will create
2452 a LOC_UNRESOLVED symbol, the address of the variable will then
2453 be determined from the minimal symbol table whenever the variable
2455 The address for the partial symbol table entry is not
2456 used by GDB, but it comes in handy for debugging partial symbol
2460 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2461 if (pdi
->locdesc
|| pdi
->has_type
)
2462 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2464 VAR_DOMAIN
, LOC_STATIC
,
2465 &objfile
->global_psymbols
,
2467 cu
->language
, objfile
);
2471 /* Static Variable. Skip symbols without location descriptors. */
2472 if (pdi
->locdesc
== NULL
)
2474 if (built_actual_name
)
2475 xfree (actual_name
);
2478 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2479 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2480 mst_file_data, objfile); */
2481 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2483 VAR_DOMAIN
, LOC_STATIC
,
2484 &objfile
->static_psymbols
,
2486 cu
->language
, objfile
);
2489 case DW_TAG_typedef
:
2490 case DW_TAG_base_type
:
2491 case DW_TAG_subrange_type
:
2492 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2494 VAR_DOMAIN
, LOC_TYPEDEF
,
2495 &objfile
->static_psymbols
,
2496 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2498 case DW_TAG_namespace
:
2499 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2501 VAR_DOMAIN
, LOC_TYPEDEF
,
2502 &objfile
->global_psymbols
,
2503 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2505 case DW_TAG_class_type
:
2506 case DW_TAG_interface_type
:
2507 case DW_TAG_structure_type
:
2508 case DW_TAG_union_type
:
2509 case DW_TAG_enumeration_type
:
2510 /* Skip external references. The DWARF standard says in the section
2511 about "Structure, Union, and Class Type Entries": "An incomplete
2512 structure, union or class type is represented by a structure,
2513 union or class entry that does not have a byte size attribute
2514 and that has a DW_AT_declaration attribute." */
2515 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2517 if (built_actual_name
)
2518 xfree (actual_name
);
2522 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2523 static vs. global. */
2524 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2526 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2527 (cu
->language
== language_cplus
2528 || cu
->language
== language_java
)
2529 ? &objfile
->global_psymbols
2530 : &objfile
->static_psymbols
,
2531 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2534 case DW_TAG_enumerator
:
2535 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2537 VAR_DOMAIN
, LOC_CONST
,
2538 (cu
->language
== language_cplus
2539 || cu
->language
== language_java
)
2540 ? &objfile
->global_psymbols
2541 : &objfile
->static_psymbols
,
2542 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2548 if (built_actual_name
)
2549 xfree (actual_name
);
2552 /* Read a partial die corresponding to a namespace; also, add a symbol
2553 corresponding to that namespace to the symbol table. NAMESPACE is
2554 the name of the enclosing namespace. */
2557 add_partial_namespace (struct partial_die_info
*pdi
,
2558 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2559 int need_pc
, struct dwarf2_cu
*cu
)
2561 /* Add a symbol for the namespace. */
2563 add_partial_symbol (pdi
, cu
);
2565 /* Now scan partial symbols in that namespace. */
2567 if (pdi
->has_children
)
2568 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2571 /* Read a partial die corresponding to a Fortran module. */
2574 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2575 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2577 /* Now scan partial symbols in that module. */
2579 if (pdi
->has_children
)
2580 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2583 /* Read a partial die corresponding to a subprogram and create a partial
2584 symbol for that subprogram. When the CU language allows it, this
2585 routine also defines a partial symbol for each nested subprogram
2586 that this subprogram contains.
2588 DIE my also be a lexical block, in which case we simply search
2589 recursively for suprograms defined inside that lexical block.
2590 Again, this is only performed when the CU language allows this
2591 type of definitions. */
2594 add_partial_subprogram (struct partial_die_info
*pdi
,
2595 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2596 int need_pc
, struct dwarf2_cu
*cu
)
2598 if (pdi
->tag
== DW_TAG_subprogram
)
2600 if (pdi
->has_pc_info
)
2602 if (pdi
->lowpc
< *lowpc
)
2603 *lowpc
= pdi
->lowpc
;
2604 if (pdi
->highpc
> *highpc
)
2605 *highpc
= pdi
->highpc
;
2609 struct objfile
*objfile
= cu
->objfile
;
2611 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2612 SECT_OFF_TEXT (objfile
));
2613 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2614 pdi
->lowpc
+ baseaddr
,
2615 pdi
->highpc
- 1 + baseaddr
,
2616 cu
->per_cu
->psymtab
);
2618 if (!pdi
->is_declaration
)
2619 /* Ignore subprogram DIEs that do not have a name, they are
2620 illegal. Do not emit a complaint at this point, we will
2621 do so when we convert this psymtab into a symtab. */
2623 add_partial_symbol (pdi
, cu
);
2627 if (! pdi
->has_children
)
2630 if (cu
->language
== language_ada
)
2632 pdi
= pdi
->die_child
;
2635 fixup_partial_die (pdi
, cu
);
2636 if (pdi
->tag
== DW_TAG_subprogram
2637 || pdi
->tag
== DW_TAG_lexical_block
)
2638 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2639 pdi
= pdi
->die_sibling
;
2644 /* See if we can figure out if the class lives in a namespace. We do
2645 this by looking for a member function; its demangled name will
2646 contain namespace info, if there is any. */
2649 guess_structure_name (struct partial_die_info
*struct_pdi
,
2650 struct dwarf2_cu
*cu
)
2652 if ((cu
->language
== language_cplus
2653 || cu
->language
== language_java
)
2654 && cu
->has_namespace_info
== 0
2655 && struct_pdi
->has_children
)
2657 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2658 what template types look like, because the demangler
2659 frequently doesn't give the same name as the debug info. We
2660 could fix this by only using the demangled name to get the
2661 prefix (but see comment in read_structure_type). */
2663 struct partial_die_info
*real_pdi
;
2665 /* If this DIE (this DIE's specification, if any) has a parent, then
2666 we should not do this. We'll prepend the parent's fully qualified
2667 name when we create the partial symbol. */
2669 real_pdi
= struct_pdi
;
2670 while (real_pdi
->has_specification
)
2671 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2673 if (real_pdi
->die_parent
!= NULL
)
2678 /* Read a partial die corresponding to an enumeration type. */
2681 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2682 struct dwarf2_cu
*cu
)
2684 struct partial_die_info
*pdi
;
2686 if (enum_pdi
->name
!= NULL
)
2687 add_partial_symbol (enum_pdi
, cu
);
2689 pdi
= enum_pdi
->die_child
;
2692 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2693 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2695 add_partial_symbol (pdi
, cu
);
2696 pdi
= pdi
->die_sibling
;
2700 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2701 Return the corresponding abbrev, or NULL if the number is zero (indicating
2702 an empty DIE). In either case *BYTES_READ will be set to the length of
2703 the initial number. */
2705 static struct abbrev_info
*
2706 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2707 struct dwarf2_cu
*cu
)
2709 bfd
*abfd
= cu
->objfile
->obfd
;
2710 unsigned int abbrev_number
;
2711 struct abbrev_info
*abbrev
;
2713 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2715 if (abbrev_number
== 0)
2718 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2721 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2722 bfd_get_filename (abfd
));
2728 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2729 Returns a pointer to the end of a series of DIEs, terminated by an empty
2730 DIE. Any children of the skipped DIEs will also be skipped. */
2733 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2735 struct abbrev_info
*abbrev
;
2736 unsigned int bytes_read
;
2740 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2742 return info_ptr
+ bytes_read
;
2744 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2748 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2749 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2750 abbrev corresponding to that skipped uleb128 should be passed in
2751 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2755 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2756 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2758 unsigned int bytes_read
;
2759 struct attribute attr
;
2760 bfd
*abfd
= cu
->objfile
->obfd
;
2761 unsigned int form
, i
;
2763 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2765 /* The only abbrev we care about is DW_AT_sibling. */
2766 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2768 read_attribute (&attr
, &abbrev
->attrs
[i
],
2769 abfd
, info_ptr
, cu
);
2770 if (attr
.form
== DW_FORM_ref_addr
)
2771 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2773 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2776 /* If it isn't DW_AT_sibling, skip this attribute. */
2777 form
= abbrev
->attrs
[i
].form
;
2781 case DW_FORM_ref_addr
:
2782 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
2783 and later it is offset sized. */
2784 if (cu
->header
.version
== 2)
2785 info_ptr
+= cu
->header
.addr_size
;
2787 info_ptr
+= cu
->header
.offset_size
;
2790 info_ptr
+= cu
->header
.addr_size
;
2797 case DW_FORM_flag_present
:
2812 case DW_FORM_string
:
2813 read_string (abfd
, info_ptr
, &bytes_read
);
2814 info_ptr
+= bytes_read
;
2816 case DW_FORM_sec_offset
:
2818 info_ptr
+= cu
->header
.offset_size
;
2820 case DW_FORM_exprloc
:
2822 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2823 info_ptr
+= bytes_read
;
2825 case DW_FORM_block1
:
2826 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2828 case DW_FORM_block2
:
2829 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2831 case DW_FORM_block4
:
2832 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2836 case DW_FORM_ref_udata
:
2837 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2839 case DW_FORM_indirect
:
2840 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2841 info_ptr
+= bytes_read
;
2842 /* We need to continue parsing from here, so just go back to
2844 goto skip_attribute
;
2847 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2848 dwarf_form_name (form
),
2849 bfd_get_filename (abfd
));
2853 if (abbrev
->has_children
)
2854 return skip_children (buffer
, info_ptr
, cu
);
2859 /* Locate ORIG_PDI's sibling.
2860 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2864 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2865 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2866 bfd
*abfd
, struct dwarf2_cu
*cu
)
2868 /* Do we know the sibling already? */
2870 if (orig_pdi
->sibling
)
2871 return orig_pdi
->sibling
;
2873 /* Are there any children to deal with? */
2875 if (!orig_pdi
->has_children
)
2878 /* Skip the children the long way. */
2880 return skip_children (buffer
, info_ptr
, cu
);
2883 /* Expand this partial symbol table into a full symbol table. */
2886 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2888 /* FIXME: This is barely more than a stub. */
2893 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2899 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2900 gdb_flush (gdb_stdout
);
2903 /* Restore our global data. */
2904 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2905 dwarf2_objfile_data_key
);
2907 /* If this psymtab is constructed from a debug-only objfile, the
2908 has_section_at_zero flag will not necessarily be correct. We
2909 can get the correct value for this flag by looking at the data
2910 associated with the (presumably stripped) associated objfile. */
2911 if (pst
->objfile
->separate_debug_objfile_backlink
)
2913 struct dwarf2_per_objfile
*dpo_backlink
2914 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
2915 dwarf2_objfile_data_key
);
2917 dwarf2_per_objfile
->has_section_at_zero
2918 = dpo_backlink
->has_section_at_zero
;
2921 psymtab_to_symtab_1 (pst
);
2923 /* Finish up the debug error message. */
2925 printf_filtered (_("done.\n"));
2930 /* Add PER_CU to the queue. */
2933 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2935 struct dwarf2_queue_item
*item
;
2938 item
= xmalloc (sizeof (*item
));
2939 item
->per_cu
= per_cu
;
2942 if (dwarf2_queue
== NULL
)
2943 dwarf2_queue
= item
;
2945 dwarf2_queue_tail
->next
= item
;
2947 dwarf2_queue_tail
= item
;
2950 /* Process the queue. */
2953 process_queue (struct objfile
*objfile
)
2955 struct dwarf2_queue_item
*item
, *next_item
;
2957 /* The queue starts out with one item, but following a DIE reference
2958 may load a new CU, adding it to the end of the queue. */
2959 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2961 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2962 process_full_comp_unit (item
->per_cu
);
2964 item
->per_cu
->queued
= 0;
2965 next_item
= item
->next
;
2969 dwarf2_queue_tail
= NULL
;
2972 /* Free all allocated queue entries. This function only releases anything if
2973 an error was thrown; if the queue was processed then it would have been
2974 freed as we went along. */
2977 dwarf2_release_queue (void *dummy
)
2979 struct dwarf2_queue_item
*item
, *last
;
2981 item
= dwarf2_queue
;
2984 /* Anything still marked queued is likely to be in an
2985 inconsistent state, so discard it. */
2986 if (item
->per_cu
->queued
)
2988 if (item
->per_cu
->cu
!= NULL
)
2989 free_one_cached_comp_unit (item
->per_cu
->cu
);
2990 item
->per_cu
->queued
= 0;
2998 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
3001 /* Read in full symbols for PST, and anything it depends on. */
3004 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
3006 struct dwarf2_per_cu_data
*per_cu
;
3007 struct cleanup
*back_to
;
3010 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
3011 if (!pst
->dependencies
[i
]->readin
)
3013 /* Inform about additional files that need to be read in. */
3016 /* FIXME: i18n: Need to make this a single string. */
3017 fputs_filtered (" ", gdb_stdout
);
3019 fputs_filtered ("and ", gdb_stdout
);
3021 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
3022 wrap_here (""); /* Flush output */
3023 gdb_flush (gdb_stdout
);
3025 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3028 per_cu
= pst
->read_symtab_private
;
3032 /* It's an include file, no symbols to read for it.
3033 Everything is in the parent symtab. */
3038 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3040 queue_comp_unit (per_cu
, pst
->objfile
);
3042 if (per_cu
->from_debug_types
)
3043 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3045 load_full_comp_unit (per_cu
, pst
->objfile
);
3047 process_queue (pst
->objfile
);
3049 /* Age the cache, releasing compilation units that have not
3050 been used recently. */
3051 age_cached_comp_units ();
3053 do_cleanups (back_to
);
3056 /* Load the DIEs associated with PER_CU into memory. */
3059 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3061 bfd
*abfd
= objfile
->obfd
;
3062 struct dwarf2_cu
*cu
;
3063 unsigned int offset
;
3064 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3065 struct cleanup
*back_to
, *free_cu_cleanup
;
3066 struct attribute
*attr
;
3068 gdb_assert (! per_cu
->from_debug_types
);
3070 /* Set local variables from the partial symbol table info. */
3071 offset
= per_cu
->offset
;
3073 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3074 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3075 beg_of_comp_unit
= info_ptr
;
3077 cu
= alloc_one_comp_unit (objfile
);
3079 /* If an error occurs while loading, release our storage. */
3080 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3082 /* Read in the comp_unit header. */
3083 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3085 /* Complete the cu_header. */
3086 cu
->header
.offset
= offset
;
3087 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3089 /* Read the abbrevs for this compilation unit. */
3090 dwarf2_read_abbrevs (abfd
, cu
);
3091 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3093 /* Link this compilation unit into the compilation unit tree. */
3095 cu
->per_cu
= per_cu
;
3096 cu
->type_hash
= per_cu
->type_hash
;
3098 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3100 /* We try not to read any attributes in this function, because not
3101 all objfiles needed for references have been loaded yet, and symbol
3102 table processing isn't initialized. But we have to set the CU language,
3103 or we won't be able to build types correctly. */
3104 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3106 set_cu_language (DW_UNSND (attr
), cu
);
3108 set_cu_language (language_minimal
, cu
);
3110 /* Similarly, if we do not read the producer, we can not apply
3111 producer-specific interpretation. */
3112 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
3114 cu
->producer
= DW_STRING (attr
);
3116 /* Link this CU into read_in_chain. */
3117 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3118 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3120 do_cleanups (back_to
);
3122 /* We've successfully allocated this compilation unit. Let our caller
3123 clean it up when finished with it. */
3124 discard_cleanups (free_cu_cleanup
);
3127 /* Generate full symbol information for PST and CU, whose DIEs have
3128 already been loaded into memory. */
3131 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3133 struct partial_symtab
*pst
= per_cu
->psymtab
;
3134 struct dwarf2_cu
*cu
= per_cu
->cu
;
3135 struct objfile
*objfile
= pst
->objfile
;
3136 CORE_ADDR lowpc
, highpc
;
3137 struct symtab
*symtab
;
3138 struct cleanup
*back_to
;
3141 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3144 back_to
= make_cleanup (really_free_pendings
, NULL
);
3146 cu
->list_in_scope
= &file_symbols
;
3148 dwarf2_find_base_address (cu
->dies
, cu
);
3150 /* Do line number decoding in read_file_scope () */
3151 process_die (cu
->dies
, cu
);
3153 /* Some compilers don't define a DW_AT_high_pc attribute for the
3154 compilation unit. If the DW_AT_high_pc is missing, synthesize
3155 it, by scanning the DIE's below the compilation unit. */
3156 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3158 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3160 /* Set symtab language to language from DW_AT_language.
3161 If the compilation is from a C file generated by language preprocessors,
3162 do not set the language if it was already deduced by start_subfile. */
3164 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3166 symtab
->language
= cu
->language
;
3168 pst
->symtab
= symtab
;
3171 do_cleanups (back_to
);
3174 /* Process a die and its children. */
3177 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3181 case DW_TAG_padding
:
3183 case DW_TAG_compile_unit
:
3184 read_file_scope (die
, cu
);
3186 case DW_TAG_type_unit
:
3187 read_type_unit_scope (die
, cu
);
3189 case DW_TAG_subprogram
:
3190 case DW_TAG_inlined_subroutine
:
3191 read_func_scope (die
, cu
);
3193 case DW_TAG_lexical_block
:
3194 case DW_TAG_try_block
:
3195 case DW_TAG_catch_block
:
3196 read_lexical_block_scope (die
, cu
);
3198 case DW_TAG_class_type
:
3199 case DW_TAG_interface_type
:
3200 case DW_TAG_structure_type
:
3201 case DW_TAG_union_type
:
3202 process_structure_scope (die
, cu
);
3204 case DW_TAG_enumeration_type
:
3205 process_enumeration_scope (die
, cu
);
3208 /* These dies have a type, but processing them does not create
3209 a symbol or recurse to process the children. Therefore we can
3210 read them on-demand through read_type_die. */
3211 case DW_TAG_subroutine_type
:
3212 case DW_TAG_set_type
:
3213 case DW_TAG_array_type
:
3214 case DW_TAG_pointer_type
:
3215 case DW_TAG_ptr_to_member_type
:
3216 case DW_TAG_reference_type
:
3217 case DW_TAG_string_type
:
3220 case DW_TAG_base_type
:
3221 case DW_TAG_subrange_type
:
3222 case DW_TAG_typedef
:
3223 case DW_TAG_const_type
:
3224 case DW_TAG_volatile_type
:
3225 /* Add a typedef symbol for the type definition, if it has a
3227 new_symbol (die
, read_type_die (die
, cu
), cu
);
3229 case DW_TAG_common_block
:
3230 read_common_block (die
, cu
);
3232 case DW_TAG_common_inclusion
:
3234 case DW_TAG_namespace
:
3235 processing_has_namespace_info
= 1;
3236 read_namespace (die
, cu
);
3239 processing_has_namespace_info
= 1;
3240 read_module (die
, cu
);
3242 case DW_TAG_imported_declaration
:
3243 case DW_TAG_imported_module
:
3244 processing_has_namespace_info
= 1;
3245 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3246 || cu
->language
!= language_fortran
))
3247 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3248 dwarf_tag_name (die
->tag
));
3249 read_import_statement (die
, cu
);
3252 new_symbol (die
, NULL
, cu
);
3257 /* A helper function for dwarf2_compute_name which determines whether DIE
3258 needs to have the name of the scope prepended to the name listed in the
3262 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
3264 struct attribute
*attr
;
3268 case DW_TAG_namespace
:
3269 case DW_TAG_typedef
:
3270 case DW_TAG_class_type
:
3271 case DW_TAG_interface_type
:
3272 case DW_TAG_structure_type
:
3273 case DW_TAG_union_type
:
3274 case DW_TAG_enumeration_type
:
3275 case DW_TAG_enumerator
:
3276 case DW_TAG_subprogram
:
3280 case DW_TAG_variable
:
3281 /* We only need to prefix "globally" visible variables. These include
3282 any variable marked with DW_AT_external or any variable that
3283 lives in a namespace. [Variables in anonymous namespaces
3284 require prefixing, but they are not DW_AT_external.] */
3286 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
3288 struct dwarf2_cu
*spec_cu
= cu
;
3290 return die_needs_namespace (die_specification (die
, &spec_cu
),
3294 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
3295 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
3296 && die
->parent
->tag
!= DW_TAG_module
)
3298 /* A variable in a lexical block of some kind does not need a
3299 namespace, even though in C++ such variables may be external
3300 and have a mangled name. */
3301 if (die
->parent
->tag
== DW_TAG_lexical_block
3302 || die
->parent
->tag
== DW_TAG_try_block
3303 || die
->parent
->tag
== DW_TAG_catch_block
3304 || die
->parent
->tag
== DW_TAG_subprogram
)
3313 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
3314 compute the physname for the object, which include a method's
3315 formal parameters (C++/Java) and return type (Java).
3317 For Ada, return the DIE's linkage name rather than the fully qualified
3318 name. PHYSNAME is ignored..
3320 The result is allocated on the objfile_obstack and canonicalized. */
3323 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
3327 name
= dwarf2_name (die
, cu
);
3329 /* For Fortran GDB prefers DW_AT_*linkage_name if present but otherwise
3330 compute it by typename_concat inside GDB. */
3331 if (cu
->language
== language_ada
3332 || (cu
->language
== language_fortran
&& physname
))
3334 /* For Ada unit, we prefer the linkage name over the name, as
3335 the former contains the exported name, which the user expects
3336 to be able to reference. Ideally, we want the user to be able
3337 to reference this entity using either natural or linkage name,
3338 but we haven't started looking at this enhancement yet. */
3339 struct attribute
*attr
;
3341 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
3343 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
3344 if (attr
&& DW_STRING (attr
))
3345 return DW_STRING (attr
);
3348 /* These are the only languages we know how to qualify names in. */
3350 && (cu
->language
== language_cplus
|| cu
->language
== language_java
3351 || cu
->language
== language_fortran
))
3353 if (die_needs_namespace (die
, cu
))
3357 struct ui_file
*buf
;
3359 prefix
= determine_prefix (die
, cu
);
3360 buf
= mem_fileopen ();
3361 if (*prefix
!= '\0')
3363 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
3366 fputs_unfiltered (prefixed_name
, buf
);
3367 xfree (prefixed_name
);
3370 fputs_unfiltered (name
? name
: "", buf
);
3372 /* For Java and C++ methods, append formal parameter type
3373 information, if PHYSNAME. */
3375 if (physname
&& die
->tag
== DW_TAG_subprogram
3376 && (cu
->language
== language_cplus
3377 || cu
->language
== language_java
))
3379 struct type
*type
= read_type_die (die
, cu
);
3381 c_type_print_args (type
, buf
, 0, cu
->language
);
3383 if (cu
->language
== language_java
)
3385 /* For java, we must append the return type to method
3387 if (die
->tag
== DW_TAG_subprogram
)
3388 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
3391 else if (cu
->language
== language_cplus
)
3393 if (TYPE_NFIELDS (type
) > 0
3394 && TYPE_FIELD_ARTIFICIAL (type
, 0)
3395 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
3396 fputs_unfiltered (" const", buf
);
3400 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
3402 ui_file_delete (buf
);
3404 if (cu
->language
== language_cplus
)
3407 = dwarf2_canonicalize_name (name
, cu
,
3408 &cu
->objfile
->objfile_obstack
);
3419 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3420 If scope qualifiers are appropriate they will be added. The result
3421 will be allocated on the objfile_obstack, or NULL if the DIE does
3422 not have a name. NAME may either be from a previous call to
3423 dwarf2_name or NULL.
3425 The output string will be canonicalized (if C++/Java). */
3428 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3430 return dwarf2_compute_name (name
, die
, cu
, 0);
3433 /* Construct a physname for the given DIE in CU. NAME may either be
3434 from a previous call to dwarf2_name or NULL. The result will be
3435 allocated on the objfile_objstack or NULL if the DIE does not have a
3438 The output string will be canonicalized (if C++/Java). */
3441 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3443 return dwarf2_compute_name (name
, die
, cu
, 1);
3446 /* Read the import statement specified by the given die and record it. */
3449 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3451 struct attribute
*import_attr
;
3452 struct die_info
*imported_die
;
3453 struct dwarf2_cu
*imported_cu
;
3454 const char *imported_name
;
3455 const char *imported_name_prefix
;
3456 const char *canonical_name
;
3457 const char *import_alias
;
3458 const char *imported_declaration
= NULL
;
3459 const char *import_prefix
;
3463 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3464 if (import_attr
== NULL
)
3466 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3467 dwarf_tag_name (die
->tag
));
3472 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3473 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3474 if (imported_name
== NULL
)
3476 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3478 The import in the following code:
3492 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3493 <52> DW_AT_decl_file : 1
3494 <53> DW_AT_decl_line : 6
3495 <54> DW_AT_import : <0x75>
3496 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3498 <5b> DW_AT_decl_file : 1
3499 <5c> DW_AT_decl_line : 2
3500 <5d> DW_AT_type : <0x6e>
3502 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3503 <76> DW_AT_byte_size : 4
3504 <77> DW_AT_encoding : 5 (signed)
3506 imports the wrong die ( 0x75 instead of 0x58 ).
3507 This case will be ignored until the gcc bug is fixed. */
3511 /* Figure out the local name after import. */
3512 import_alias
= dwarf2_name (die
, cu
);
3514 /* Figure out where the statement is being imported to. */
3515 import_prefix
= determine_prefix (die
, cu
);
3517 /* Figure out what the scope of the imported die is and prepend it
3518 to the name of the imported die. */
3519 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3521 if (imported_die
->tag
!= DW_TAG_namespace
3522 && imported_die
->tag
!= DW_TAG_module
)
3524 imported_declaration
= imported_name
;
3525 canonical_name
= imported_name_prefix
;
3527 else if (strlen (imported_name_prefix
) > 0)
3529 temp
= alloca (strlen (imported_name_prefix
)
3530 + 2 + strlen (imported_name
) + 1);
3531 strcpy (temp
, imported_name_prefix
);
3532 strcat (temp
, "::");
3533 strcat (temp
, imported_name
);
3534 canonical_name
= temp
;
3537 canonical_name
= imported_name
;
3539 cp_add_using_directive (import_prefix
,
3542 imported_declaration
,
3543 &cu
->objfile
->objfile_obstack
);
3547 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3549 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3553 free_cu_line_header (void *arg
)
3555 struct dwarf2_cu
*cu
= arg
;
3557 free_line_header (cu
->line_header
);
3558 cu
->line_header
= NULL
;
3562 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3564 struct objfile
*objfile
= cu
->objfile
;
3565 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3566 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3567 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3568 struct attribute
*attr
;
3570 char *comp_dir
= NULL
;
3571 struct die_info
*child_die
;
3572 bfd
*abfd
= objfile
->obfd
;
3573 struct line_header
*line_header
= 0;
3576 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3578 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3580 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3581 from finish_block. */
3582 if (lowpc
== ((CORE_ADDR
) -1))
3587 /* Find the filename. Do not use dwarf2_name here, since the filename
3588 is not a source language identifier. */
3589 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3592 name
= DW_STRING (attr
);
3595 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3597 comp_dir
= DW_STRING (attr
);
3598 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3600 comp_dir
= ldirname (name
);
3601 if (comp_dir
!= NULL
)
3602 make_cleanup (xfree
, comp_dir
);
3604 if (comp_dir
!= NULL
)
3606 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3607 directory, get rid of it. */
3608 char *cp
= strchr (comp_dir
, ':');
3610 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3617 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3620 set_cu_language (DW_UNSND (attr
), cu
);
3623 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3625 cu
->producer
= DW_STRING (attr
);
3627 /* We assume that we're processing GCC output. */
3628 processing_gcc_compilation
= 2;
3630 processing_has_namespace_info
= 0;
3632 start_symtab (name
, comp_dir
, lowpc
);
3633 record_debugformat ("DWARF 2");
3634 record_producer (cu
->producer
);
3636 initialize_cu_func_list (cu
);
3638 /* Decode line number information if present. We do this before
3639 processing child DIEs, so that the line header table is available
3640 for DW_AT_decl_file. */
3641 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3644 unsigned int line_offset
= DW_UNSND (attr
);
3645 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3648 cu
->line_header
= line_header
;
3649 make_cleanup (free_cu_line_header
, cu
);
3650 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3654 /* Process all dies in compilation unit. */
3655 if (die
->child
!= NULL
)
3657 child_die
= die
->child
;
3658 while (child_die
&& child_die
->tag
)
3660 process_die (child_die
, cu
);
3661 child_die
= sibling_die (child_die
);
3665 /* Decode macro information, if present. Dwarf 2 macro information
3666 refers to information in the line number info statement program
3667 header, so we can only read it if we've read the header
3669 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3670 if (attr
&& line_header
)
3672 unsigned int macro_offset
= DW_UNSND (attr
);
3674 dwarf_decode_macros (line_header
, macro_offset
,
3675 comp_dir
, abfd
, cu
);
3677 do_cleanups (back_to
);
3680 /* For TUs we want to skip the first top level sibling if it's not the
3681 actual type being defined by this TU. In this case the first top
3682 level sibling is there to provide context only. */
3685 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3687 struct objfile
*objfile
= cu
->objfile
;
3688 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3690 struct attribute
*attr
;
3692 char *comp_dir
= NULL
;
3693 struct die_info
*child_die
;
3694 bfd
*abfd
= objfile
->obfd
;
3696 /* start_symtab needs a low pc, but we don't really have one.
3697 Do what read_file_scope would do in the absence of such info. */
3698 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3700 /* Find the filename. Do not use dwarf2_name here, since the filename
3701 is not a source language identifier. */
3702 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3704 name
= DW_STRING (attr
);
3706 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3708 comp_dir
= DW_STRING (attr
);
3709 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3711 comp_dir
= ldirname (name
);
3712 if (comp_dir
!= NULL
)
3713 make_cleanup (xfree
, comp_dir
);
3719 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3721 set_cu_language (DW_UNSND (attr
), cu
);
3723 /* This isn't technically needed today. It is done for symmetry
3724 with read_file_scope. */
3725 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3727 cu
->producer
= DW_STRING (attr
);
3729 /* We assume that we're processing GCC output. */
3730 processing_gcc_compilation
= 2;
3732 processing_has_namespace_info
= 0;
3734 start_symtab (name
, comp_dir
, lowpc
);
3735 record_debugformat ("DWARF 2");
3736 record_producer (cu
->producer
);
3738 /* Process the dies in the type unit. */
3739 if (die
->child
== NULL
)
3741 dump_die_for_error (die
);
3742 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3743 bfd_get_filename (abfd
));
3746 child_die
= die
->child
;
3748 while (child_die
&& child_die
->tag
)
3750 process_die (child_die
, cu
);
3752 child_die
= sibling_die (child_die
);
3755 do_cleanups (back_to
);
3759 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3760 struct dwarf2_cu
*cu
)
3762 struct function_range
*thisfn
;
3764 thisfn
= (struct function_range
*)
3765 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3766 thisfn
->name
= name
;
3767 thisfn
->lowpc
= lowpc
;
3768 thisfn
->highpc
= highpc
;
3769 thisfn
->seen_line
= 0;
3770 thisfn
->next
= NULL
;
3772 if (cu
->last_fn
== NULL
)
3773 cu
->first_fn
= thisfn
;
3775 cu
->last_fn
->next
= thisfn
;
3777 cu
->last_fn
= thisfn
;
3780 /* qsort helper for inherit_abstract_dies. */
3783 unsigned_int_compar (const void *ap
, const void *bp
)
3785 unsigned int a
= *(unsigned int *) ap
;
3786 unsigned int b
= *(unsigned int *) bp
;
3788 return (a
> b
) - (b
> a
);
3791 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3792 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3793 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3796 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3798 struct die_info
*child_die
;
3799 unsigned die_children_count
;
3800 /* CU offsets which were referenced by children of the current DIE. */
3802 unsigned *offsets_end
, *offsetp
;
3803 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3804 struct die_info
*origin_die
;
3805 /* Iterator of the ORIGIN_DIE children. */
3806 struct die_info
*origin_child_die
;
3807 struct cleanup
*cleanups
;
3808 struct attribute
*attr
;
3810 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3814 origin_die
= follow_die_ref (die
, attr
, &cu
);
3815 if (die
->tag
!= origin_die
->tag
3816 && !(die
->tag
== DW_TAG_inlined_subroutine
3817 && origin_die
->tag
== DW_TAG_subprogram
))
3818 complaint (&symfile_complaints
,
3819 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3820 die
->offset
, origin_die
->offset
);
3822 child_die
= die
->child
;
3823 die_children_count
= 0;
3824 while (child_die
&& child_die
->tag
)
3826 child_die
= sibling_die (child_die
);
3827 die_children_count
++;
3829 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3830 cleanups
= make_cleanup (xfree
, offsets
);
3832 offsets_end
= offsets
;
3833 child_die
= die
->child
;
3834 while (child_die
&& child_die
->tag
)
3836 /* For each CHILD_DIE, find the corresponding child of
3837 ORIGIN_DIE. If there is more than one layer of
3838 DW_AT_abstract_origin, follow them all; there shouldn't be,
3839 but GCC versions at least through 4.4 generate this (GCC PR
3841 struct die_info
*child_origin_die
= child_die
;
3845 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3848 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3851 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3852 counterpart may exist. */
3853 if (child_origin_die
!= child_die
)
3855 if (child_die
->tag
!= child_origin_die
->tag
3856 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3857 && child_origin_die
->tag
== DW_TAG_subprogram
))
3858 complaint (&symfile_complaints
,
3859 _("Child DIE 0x%x and its abstract origin 0x%x have "
3860 "different tags"), child_die
->offset
,
3861 child_origin_die
->offset
);
3862 if (child_origin_die
->parent
!= origin_die
)
3863 complaint (&symfile_complaints
,
3864 _("Child DIE 0x%x and its abstract origin 0x%x have "
3865 "different parents"), child_die
->offset
,
3866 child_origin_die
->offset
);
3868 *offsets_end
++ = child_origin_die
->offset
;
3870 child_die
= sibling_die (child_die
);
3872 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3873 unsigned_int_compar
);
3874 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3875 if (offsetp
[-1] == *offsetp
)
3876 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3877 "to DIE 0x%x as their abstract origin"),
3878 die
->offset
, *offsetp
);
3881 origin_child_die
= origin_die
->child
;
3882 while (origin_child_die
&& origin_child_die
->tag
)
3884 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3885 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3887 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3889 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3890 process_die (origin_child_die
, cu
);
3892 origin_child_die
= sibling_die (origin_child_die
);
3895 do_cleanups (cleanups
);
3899 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3901 struct objfile
*objfile
= cu
->objfile
;
3902 struct context_stack
*new;
3905 struct die_info
*child_die
;
3906 struct attribute
*attr
, *call_line
, *call_file
;
3909 struct block
*block
;
3910 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3914 /* If we do not have call site information, we can't show the
3915 caller of this inlined function. That's too confusing, so
3916 only use the scope for local variables. */
3917 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3918 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3919 if (call_line
== NULL
|| call_file
== NULL
)
3921 read_lexical_block_scope (die
, cu
);
3926 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3928 name
= dwarf2_name (die
, cu
);
3930 /* Ignore functions with missing or empty names. These are actually
3931 illegal according to the DWARF standard. */
3934 complaint (&symfile_complaints
,
3935 _("missing name for subprogram DIE at %d"), die
->offset
);
3939 /* Ignore functions with missing or invalid low and high pc attributes. */
3940 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3942 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
3943 if (!attr
|| !DW_UNSND (attr
))
3944 complaint (&symfile_complaints
,
3945 _("cannot get low and high bounds for subprogram DIE at %d"),
3953 /* Record the function range for dwarf_decode_lines. */
3954 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3956 new = push_context (0, lowpc
);
3957 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3959 /* If there is a location expression for DW_AT_frame_base, record
3961 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3963 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3964 expression is being recorded directly in the function's symbol
3965 and not in a separate frame-base object. I guess this hack is
3966 to avoid adding some sort of frame-base adjunct/annex to the
3967 function's symbol :-(. The problem with doing this is that it
3968 results in a function symbol with a location expression that
3969 has nothing to do with the location of the function, ouch! The
3970 relationship should be: a function's symbol has-a frame base; a
3971 frame-base has-a location expression. */
3972 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3974 cu
->list_in_scope
= &local_symbols
;
3976 if (die
->child
!= NULL
)
3978 child_die
= die
->child
;
3979 while (child_die
&& child_die
->tag
)
3981 process_die (child_die
, cu
);
3982 child_die
= sibling_die (child_die
);
3986 inherit_abstract_dies (die
, cu
);
3988 /* If we have a DW_AT_specification, we might need to import using
3989 directives from the context of the specification DIE. See the
3990 comment in determine_prefix. */
3991 if (cu
->language
== language_cplus
3992 && dwarf2_attr (die
, DW_AT_specification
, cu
))
3994 struct dwarf2_cu
*spec_cu
= cu
;
3995 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
3999 child_die
= spec_die
->child
;
4000 while (child_die
&& child_die
->tag
)
4002 if (child_die
->tag
== DW_TAG_imported_module
)
4003 process_die (child_die
, spec_cu
);
4004 child_die
= sibling_die (child_die
);
4007 /* In some cases, GCC generates specification DIEs that
4008 themselves contain DW_AT_specification attributes. */
4009 spec_die
= die_specification (spec_die
, &spec_cu
);
4013 new = pop_context ();
4014 /* Make a block for the local symbols within. */
4015 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
4016 lowpc
, highpc
, objfile
);
4018 /* For C++, set the block's scope. */
4019 if (cu
->language
== language_cplus
|| cu
->language
== language_fortran
)
4020 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
4021 determine_prefix (die
, cu
),
4022 processing_has_namespace_info
);
4024 /* If we have address ranges, record them. */
4025 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
4027 /* In C++, we can have functions nested inside functions (e.g., when
4028 a function declares a class that has methods). This means that
4029 when we finish processing a function scope, we may need to go
4030 back to building a containing block's symbol lists. */
4031 local_symbols
= new->locals
;
4032 param_symbols
= new->params
;
4033 using_directives
= new->using_directives
;
4035 /* If we've finished processing a top-level function, subsequent
4036 symbols go in the file symbol list. */
4037 if (outermost_context_p ())
4038 cu
->list_in_scope
= &file_symbols
;
4041 /* Process all the DIES contained within a lexical block scope. Start
4042 a new scope, process the dies, and then close the scope. */
4045 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4047 struct objfile
*objfile
= cu
->objfile
;
4048 struct context_stack
*new;
4049 CORE_ADDR lowpc
, highpc
;
4050 struct die_info
*child_die
;
4053 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4055 /* Ignore blocks with missing or invalid low and high pc attributes. */
4056 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
4057 as multiple lexical blocks? Handling children in a sane way would
4058 be nasty. Might be easier to properly extend generic blocks to
4060 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
4065 push_context (0, lowpc
);
4066 if (die
->child
!= NULL
)
4068 child_die
= die
->child
;
4069 while (child_die
&& child_die
->tag
)
4071 process_die (child_die
, cu
);
4072 child_die
= sibling_die (child_die
);
4075 new = pop_context ();
4077 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
4080 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
4083 /* Note that recording ranges after traversing children, as we
4084 do here, means that recording a parent's ranges entails
4085 walking across all its children's ranges as they appear in
4086 the address map, which is quadratic behavior.
4088 It would be nicer to record the parent's ranges before
4089 traversing its children, simply overriding whatever you find
4090 there. But since we don't even decide whether to create a
4091 block until after we've traversed its children, that's hard
4093 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
4095 local_symbols
= new->locals
;
4096 using_directives
= new->using_directives
;
4099 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
4100 Return 1 if the attributes are present and valid, otherwise, return 0.
4101 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
4104 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
4105 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
4106 struct partial_symtab
*ranges_pst
)
4108 struct objfile
*objfile
= cu
->objfile
;
4109 struct comp_unit_head
*cu_header
= &cu
->header
;
4110 bfd
*obfd
= objfile
->obfd
;
4111 unsigned int addr_size
= cu_header
->addr_size
;
4112 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4113 /* Base address selection entry. */
4124 found_base
= cu
->base_known
;
4125 base
= cu
->base_address
;
4127 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
4128 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4130 complaint (&symfile_complaints
,
4131 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4135 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4137 /* Read in the largest possible address. */
4138 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4139 if ((marker
& mask
) == mask
)
4141 /* If we found the largest possible address, then
4142 read the base address. */
4143 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4144 buffer
+= 2 * addr_size
;
4145 offset
+= 2 * addr_size
;
4151 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4155 CORE_ADDR range_beginning
, range_end
;
4157 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4158 buffer
+= addr_size
;
4159 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4160 buffer
+= addr_size
;
4161 offset
+= 2 * addr_size
;
4163 /* An end of list marker is a pair of zero addresses. */
4164 if (range_beginning
== 0 && range_end
== 0)
4165 /* Found the end of list entry. */
4168 /* Each base address selection entry is a pair of 2 values.
4169 The first is the largest possible address, the second is
4170 the base address. Check for a base address here. */
4171 if ((range_beginning
& mask
) == mask
)
4173 /* If we found the largest possible address, then
4174 read the base address. */
4175 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4182 /* We have no valid base address for the ranges
4184 complaint (&symfile_complaints
,
4185 _("Invalid .debug_ranges data (no base address)"));
4189 range_beginning
+= base
;
4192 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4193 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4194 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4197 /* FIXME: This is recording everything as a low-high
4198 segment of consecutive addresses. We should have a
4199 data structure for discontiguous block ranges
4203 low
= range_beginning
;
4209 if (range_beginning
< low
)
4210 low
= range_beginning
;
4211 if (range_end
> high
)
4217 /* If the first entry is an end-of-list marker, the range
4218 describes an empty scope, i.e. no instructions. */
4224 *high_return
= high
;
4228 /* Get low and high pc attributes from a die. Return 1 if the attributes
4229 are present and valid, otherwise, return 0. Return -1 if the range is
4230 discontinuous, i.e. derived from DW_AT_ranges information. */
4232 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4233 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4234 struct partial_symtab
*pst
)
4236 struct attribute
*attr
;
4241 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4244 high
= DW_ADDR (attr
);
4245 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4247 low
= DW_ADDR (attr
);
4249 /* Found high w/o low attribute. */
4252 /* Found consecutive range of addresses. */
4257 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4260 /* Value of the DW_AT_ranges attribute is the offset in the
4261 .debug_ranges section. */
4262 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4264 /* Found discontinuous range of addresses. */
4272 /* When using the GNU linker, .gnu.linkonce. sections are used to
4273 eliminate duplicate copies of functions and vtables and such.
4274 The linker will arbitrarily choose one and discard the others.
4275 The AT_*_pc values for such functions refer to local labels in
4276 these sections. If the section from that file was discarded, the
4277 labels are not in the output, so the relocs get a value of 0.
4278 If this is a discarded function, mark the pc bounds as invalid,
4279 so that GDB will ignore it. */
4280 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4288 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4289 its low and high PC addresses. Do nothing if these addresses could not
4290 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4291 and HIGHPC to the high address if greater than HIGHPC. */
4294 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4295 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4296 struct dwarf2_cu
*cu
)
4298 CORE_ADDR low
, high
;
4299 struct die_info
*child
= die
->child
;
4301 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4303 *lowpc
= min (*lowpc
, low
);
4304 *highpc
= max (*highpc
, high
);
4307 /* If the language does not allow nested subprograms (either inside
4308 subprograms or lexical blocks), we're done. */
4309 if (cu
->language
!= language_ada
)
4312 /* Check all the children of the given DIE. If it contains nested
4313 subprograms, then check their pc bounds. Likewise, we need to
4314 check lexical blocks as well, as they may also contain subprogram
4316 while (child
&& child
->tag
)
4318 if (child
->tag
== DW_TAG_subprogram
4319 || child
->tag
== DW_TAG_lexical_block
)
4320 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4321 child
= sibling_die (child
);
4325 /* Get the low and high pc's represented by the scope DIE, and store
4326 them in *LOWPC and *HIGHPC. If the correct values can't be
4327 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4330 get_scope_pc_bounds (struct die_info
*die
,
4331 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4332 struct dwarf2_cu
*cu
)
4334 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4335 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4336 CORE_ADDR current_low
, current_high
;
4338 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4340 best_low
= current_low
;
4341 best_high
= current_high
;
4345 struct die_info
*child
= die
->child
;
4347 while (child
&& child
->tag
)
4349 switch (child
->tag
) {
4350 case DW_TAG_subprogram
:
4351 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4353 case DW_TAG_namespace
:
4355 /* FIXME: carlton/2004-01-16: Should we do this for
4356 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4357 that current GCC's always emit the DIEs corresponding
4358 to definitions of methods of classes as children of a
4359 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4360 the DIEs giving the declarations, which could be
4361 anywhere). But I don't see any reason why the
4362 standards says that they have to be there. */
4363 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4365 if (current_low
!= ((CORE_ADDR
) -1))
4367 best_low
= min (best_low
, current_low
);
4368 best_high
= max (best_high
, current_high
);
4376 child
= sibling_die (child
);
4381 *highpc
= best_high
;
4384 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4387 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4388 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4390 struct attribute
*attr
;
4392 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4395 CORE_ADDR high
= DW_ADDR (attr
);
4397 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4400 CORE_ADDR low
= DW_ADDR (attr
);
4402 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4406 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4409 bfd
*obfd
= cu
->objfile
->obfd
;
4411 /* The value of the DW_AT_ranges attribute is the offset of the
4412 address range list in the .debug_ranges section. */
4413 unsigned long offset
= DW_UNSND (attr
);
4414 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4416 /* For some target architectures, but not others, the
4417 read_address function sign-extends the addresses it returns.
4418 To recognize base address selection entries, we need a
4420 unsigned int addr_size
= cu
->header
.addr_size
;
4421 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4423 /* The base address, to which the next pair is relative. Note
4424 that this 'base' is a DWARF concept: most entries in a range
4425 list are relative, to reduce the number of relocs against the
4426 debugging information. This is separate from this function's
4427 'baseaddr' argument, which GDB uses to relocate debugging
4428 information from a shared library based on the address at
4429 which the library was loaded. */
4430 CORE_ADDR base
= cu
->base_address
;
4431 int base_known
= cu
->base_known
;
4433 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
4434 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4436 complaint (&symfile_complaints
,
4437 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4444 unsigned int bytes_read
;
4445 CORE_ADDR start
, end
;
4447 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4448 buffer
+= bytes_read
;
4449 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4450 buffer
+= bytes_read
;
4452 /* Did we find the end of the range list? */
4453 if (start
== 0 && end
== 0)
4456 /* Did we find a base address selection entry? */
4457 else if ((start
& base_select_mask
) == base_select_mask
)
4463 /* We found an ordinary address range. */
4468 complaint (&symfile_complaints
,
4469 _("Invalid .debug_ranges data (no base address)"));
4473 record_block_range (block
,
4474 baseaddr
+ base
+ start
,
4475 baseaddr
+ base
+ end
- 1);
4481 /* Add an aggregate field to the field list. */
4484 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4485 struct dwarf2_cu
*cu
)
4487 struct objfile
*objfile
= cu
->objfile
;
4488 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4489 struct nextfield
*new_field
;
4490 struct attribute
*attr
;
4492 char *fieldname
= "";
4494 /* Allocate a new field list entry and link it in. */
4495 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4496 make_cleanup (xfree
, new_field
);
4497 memset (new_field
, 0, sizeof (struct nextfield
));
4499 if (die
->tag
== DW_TAG_inheritance
)
4501 new_field
->next
= fip
->baseclasses
;
4502 fip
->baseclasses
= new_field
;
4506 new_field
->next
= fip
->fields
;
4507 fip
->fields
= new_field
;
4511 /* Handle accessibility and virtuality of field.
4512 The default accessibility for members is public, the default
4513 accessibility for inheritance is private. */
4514 if (die
->tag
!= DW_TAG_inheritance
)
4515 new_field
->accessibility
= DW_ACCESS_public
;
4517 new_field
->accessibility
= DW_ACCESS_private
;
4518 new_field
->virtuality
= DW_VIRTUALITY_none
;
4520 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4522 new_field
->accessibility
= DW_UNSND (attr
);
4523 if (new_field
->accessibility
!= DW_ACCESS_public
)
4524 fip
->non_public_fields
= 1;
4525 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4527 new_field
->virtuality
= DW_UNSND (attr
);
4529 fp
= &new_field
->field
;
4531 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4533 /* Data member other than a C++ static data member. */
4535 /* Get type of field. */
4536 fp
->type
= die_type (die
, cu
);
4538 SET_FIELD_BITPOS (*fp
, 0);
4540 /* Get bit size of field (zero if none). */
4541 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4544 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4548 FIELD_BITSIZE (*fp
) = 0;
4551 /* Get bit offset of field. */
4552 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4555 int byte_offset
= 0;
4557 if (attr_form_is_section_offset (attr
))
4558 dwarf2_complex_location_expr_complaint ();
4559 else if (attr_form_is_constant (attr
))
4560 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4561 else if (attr_form_is_block (attr
))
4562 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4564 dwarf2_complex_location_expr_complaint ();
4566 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4568 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4571 if (gdbarch_bits_big_endian (gdbarch
))
4573 /* For big endian bits, the DW_AT_bit_offset gives the
4574 additional bit offset from the MSB of the containing
4575 anonymous object to the MSB of the field. We don't
4576 have to do anything special since we don't need to
4577 know the size of the anonymous object. */
4578 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4582 /* For little endian bits, compute the bit offset to the
4583 MSB of the anonymous object, subtract off the number of
4584 bits from the MSB of the field to the MSB of the
4585 object, and then subtract off the number of bits of
4586 the field itself. The result is the bit offset of
4587 the LSB of the field. */
4589 int bit_offset
= DW_UNSND (attr
);
4591 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4594 /* The size of the anonymous object containing
4595 the bit field is explicit, so use the
4596 indicated size (in bytes). */
4597 anonymous_size
= DW_UNSND (attr
);
4601 /* The size of the anonymous object containing
4602 the bit field must be inferred from the type
4603 attribute of the data member containing the
4605 anonymous_size
= TYPE_LENGTH (fp
->type
);
4607 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4608 - bit_offset
- FIELD_BITSIZE (*fp
);
4612 /* Get name of field. */
4613 fieldname
= dwarf2_name (die
, cu
);
4614 if (fieldname
== NULL
)
4617 /* The name is already allocated along with this objfile, so we don't
4618 need to duplicate it for the type. */
4619 fp
->name
= fieldname
;
4621 /* Change accessibility for artificial fields (e.g. virtual table
4622 pointer or virtual base class pointer) to private. */
4623 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4625 FIELD_ARTIFICIAL (*fp
) = 1;
4626 new_field
->accessibility
= DW_ACCESS_private
;
4627 fip
->non_public_fields
= 1;
4630 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4632 /* C++ static member. */
4634 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4635 is a declaration, but all versions of G++ as of this writing
4636 (so through at least 3.2.1) incorrectly generate
4637 DW_TAG_variable tags. */
4641 /* Get name of field. */
4642 fieldname
= dwarf2_name (die
, cu
);
4643 if (fieldname
== NULL
)
4646 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
4648 /* Only create a symbol if this is an external value.
4649 new_symbol checks this and puts the value in the global symbol
4650 table, which we want. If it is not external, new_symbol
4651 will try to put the value in cu->list_in_scope which is wrong. */
4652 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
4654 /* A static const member, not much different than an enum as far as
4655 we're concerned, except that we can support more types. */
4656 new_symbol (die
, NULL
, cu
);
4659 /* Get physical name. */
4660 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4662 /* The name is already allocated along with this objfile, so we don't
4663 need to duplicate it for the type. */
4664 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4665 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4666 FIELD_NAME (*fp
) = fieldname
;
4668 else if (die
->tag
== DW_TAG_inheritance
)
4670 /* C++ base class field. */
4671 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4674 int byte_offset
= 0;
4676 if (attr_form_is_section_offset (attr
))
4677 dwarf2_complex_location_expr_complaint ();
4678 else if (attr_form_is_constant (attr
))
4679 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4680 else if (attr_form_is_block (attr
))
4681 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4683 dwarf2_complex_location_expr_complaint ();
4685 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4687 FIELD_BITSIZE (*fp
) = 0;
4688 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4689 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4690 fip
->nbaseclasses
++;
4694 /* Add a typedef defined in the scope of the FIP's class. */
4697 dwarf2_add_typedef (struct field_info
*fip
, struct die_info
*die
,
4698 struct dwarf2_cu
*cu
)
4700 struct objfile
*objfile
= cu
->objfile
;
4701 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4702 struct typedef_field_list
*new_field
;
4703 struct attribute
*attr
;
4704 struct typedef_field
*fp
;
4705 char *fieldname
= "";
4707 /* Allocate a new field list entry and link it in. */
4708 new_field
= xzalloc (sizeof (*new_field
));
4709 make_cleanup (xfree
, new_field
);
4711 gdb_assert (die
->tag
== DW_TAG_typedef
);
4713 fp
= &new_field
->field
;
4715 /* Get name of field. */
4716 fp
->name
= dwarf2_name (die
, cu
);
4717 if (fp
->name
== NULL
)
4720 fp
->type
= read_type_die (die
, cu
);
4722 new_field
->next
= fip
->typedef_field_list
;
4723 fip
->typedef_field_list
= new_field
;
4724 fip
->typedef_field_list_count
++;
4727 /* Create the vector of fields, and attach it to the type. */
4730 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4731 struct dwarf2_cu
*cu
)
4733 int nfields
= fip
->nfields
;
4735 /* Record the field count, allocate space for the array of fields,
4736 and create blank accessibility bitfields if necessary. */
4737 TYPE_NFIELDS (type
) = nfields
;
4738 TYPE_FIELDS (type
) = (struct field
*)
4739 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4740 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4742 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
4744 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4746 TYPE_FIELD_PRIVATE_BITS (type
) =
4747 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4748 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4750 TYPE_FIELD_PROTECTED_BITS (type
) =
4751 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4752 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4754 TYPE_FIELD_IGNORE_BITS (type
) =
4755 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4756 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4759 /* If the type has baseclasses, allocate and clear a bit vector for
4760 TYPE_FIELD_VIRTUAL_BITS. */
4761 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
4763 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4764 unsigned char *pointer
;
4766 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4767 pointer
= TYPE_ALLOC (type
, num_bytes
);
4768 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4769 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4770 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4773 /* Copy the saved-up fields into the field vector. Start from the head
4774 of the list, adding to the tail of the field array, so that they end
4775 up in the same order in the array in which they were added to the list. */
4776 while (nfields
-- > 0)
4778 struct nextfield
*fieldp
;
4782 fieldp
= fip
->fields
;
4783 fip
->fields
= fieldp
->next
;
4787 fieldp
= fip
->baseclasses
;
4788 fip
->baseclasses
= fieldp
->next
;
4791 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4792 switch (fieldp
->accessibility
)
4794 case DW_ACCESS_private
:
4795 if (cu
->language
!= language_ada
)
4796 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4799 case DW_ACCESS_protected
:
4800 if (cu
->language
!= language_ada
)
4801 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4804 case DW_ACCESS_public
:
4808 /* Unknown accessibility. Complain and treat it as public. */
4810 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4811 fieldp
->accessibility
);
4815 if (nfields
< fip
->nbaseclasses
)
4817 switch (fieldp
->virtuality
)
4819 case DW_VIRTUALITY_virtual
:
4820 case DW_VIRTUALITY_pure_virtual
:
4821 if (cu
->language
== language_ada
)
4822 error ("unexpected virtuality in component of Ada type");
4823 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4830 /* Add a member function to the proper fieldlist. */
4833 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4834 struct type
*type
, struct dwarf2_cu
*cu
)
4836 struct objfile
*objfile
= cu
->objfile
;
4837 struct attribute
*attr
;
4838 struct fnfieldlist
*flp
;
4840 struct fn_field
*fnp
;
4843 struct nextfnfield
*new_fnfield
;
4844 struct type
*this_type
;
4846 if (cu
->language
== language_ada
)
4847 error ("unexpected member function in Ada type");
4849 /* Get name of member function. */
4850 fieldname
= dwarf2_name (die
, cu
);
4851 if (fieldname
== NULL
)
4854 /* Get the mangled name. */
4855 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4857 /* Look up member function name in fieldlist. */
4858 for (i
= 0; i
< fip
->nfnfields
; i
++)
4860 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4864 /* Create new list element if necessary. */
4865 if (i
< fip
->nfnfields
)
4866 flp
= &fip
->fnfieldlists
[i
];
4869 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4871 fip
->fnfieldlists
= (struct fnfieldlist
*)
4872 xrealloc (fip
->fnfieldlists
,
4873 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4874 * sizeof (struct fnfieldlist
));
4875 if (fip
->nfnfields
== 0)
4876 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4878 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4879 flp
->name
= fieldname
;
4885 /* Create a new member function field and chain it to the field list
4887 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4888 make_cleanup (xfree
, new_fnfield
);
4889 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4890 new_fnfield
->next
= flp
->head
;
4891 flp
->head
= new_fnfield
;
4894 /* Fill in the member function field info. */
4895 fnp
= &new_fnfield
->fnfield
;
4896 /* The name is already allocated along with this objfile, so we don't
4897 need to duplicate it for the type. */
4898 fnp
->physname
= physname
? physname
: "";
4899 fnp
->type
= alloc_type (objfile
);
4900 this_type
= read_type_die (die
, cu
);
4901 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4903 int nparams
= TYPE_NFIELDS (this_type
);
4905 /* TYPE is the domain of this method, and THIS_TYPE is the type
4906 of the method itself (TYPE_CODE_METHOD). */
4907 smash_to_method_type (fnp
->type
, type
,
4908 TYPE_TARGET_TYPE (this_type
),
4909 TYPE_FIELDS (this_type
),
4910 TYPE_NFIELDS (this_type
),
4911 TYPE_VARARGS (this_type
));
4913 /* Handle static member functions.
4914 Dwarf2 has no clean way to discern C++ static and non-static
4915 member functions. G++ helps GDB by marking the first
4916 parameter for non-static member functions (which is the
4917 this pointer) as artificial. We obtain this information
4918 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4919 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4920 fnp
->voffset
= VOFFSET_STATIC
;
4923 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4926 /* Get fcontext from DW_AT_containing_type if present. */
4927 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4928 fnp
->fcontext
= die_containing_type (die
, cu
);
4930 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4931 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4933 /* Get accessibility. */
4934 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4937 switch (DW_UNSND (attr
))
4939 case DW_ACCESS_private
:
4940 fnp
->is_private
= 1;
4942 case DW_ACCESS_protected
:
4943 fnp
->is_protected
= 1;
4948 /* Check for artificial methods. */
4949 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4950 if (attr
&& DW_UNSND (attr
) != 0)
4951 fnp
->is_artificial
= 1;
4953 /* Get index in virtual function table if it is a virtual member
4954 function. For older versions of GCC, this is an offset in the
4955 appropriate virtual table, as specified by DW_AT_containing_type.
4956 For everyone else, it is an expression to be evaluated relative
4957 to the object address. */
4959 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4962 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
4964 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
4966 /* Old-style GCC. */
4967 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4969 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
4970 || (DW_BLOCK (attr
)->size
> 1
4971 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
4972 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
4974 struct dwarf_block blk
;
4977 offset
= (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
4979 blk
.size
= DW_BLOCK (attr
)->size
- offset
;
4980 blk
.data
= DW_BLOCK (attr
)->data
+ offset
;
4981 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4982 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4983 dwarf2_complex_location_expr_complaint ();
4985 fnp
->voffset
/= cu
->header
.addr_size
;
4989 dwarf2_complex_location_expr_complaint ();
4992 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4994 else if (attr_form_is_section_offset (attr
))
4996 dwarf2_complex_location_expr_complaint ();
5000 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
5006 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
5007 if (attr
&& DW_UNSND (attr
))
5009 /* GCC does this, as of 2008-08-25; PR debug/37237. */
5010 complaint (&symfile_complaints
,
5011 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
5012 fieldname
, die
->offset
);
5013 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
5014 TYPE_CPLUS_DYNAMIC (type
) = 1;
5019 /* Create the vector of member function fields, and attach it to the type. */
5022 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
5023 struct dwarf2_cu
*cu
)
5025 struct fnfieldlist
*flp
;
5026 int total_length
= 0;
5029 if (cu
->language
== language_ada
)
5030 error ("unexpected member functions in Ada type");
5032 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
5033 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
5034 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
5036 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
5038 struct nextfnfield
*nfp
= flp
->head
;
5039 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
5042 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
5043 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
5044 fn_flp
->fn_fields
= (struct fn_field
*)
5045 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
5046 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
5047 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
5049 total_length
+= flp
->length
;
5052 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
5053 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
5056 /* Returns non-zero if NAME is the name of a vtable member in CU's
5057 language, zero otherwise. */
5059 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
5061 static const char vptr
[] = "_vptr";
5062 static const char vtable
[] = "vtable";
5064 /* Look for the C++ and Java forms of the vtable. */
5065 if ((cu
->language
== language_java
5066 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
5067 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
5068 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
5074 /* GCC outputs unnamed structures that are really pointers to member
5075 functions, with the ABI-specified layout. If TYPE describes
5076 such a structure, smash it into a member function type.
5078 GCC shouldn't do this; it should just output pointer to member DIEs.
5079 This is GCC PR debug/28767. */
5082 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
5084 struct type
*pfn_type
, *domain_type
, *new_type
;
5086 /* Check for a structure with no name and two children. */
5087 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
5090 /* Check for __pfn and __delta members. */
5091 if (TYPE_FIELD_NAME (type
, 0) == NULL
5092 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
5093 || TYPE_FIELD_NAME (type
, 1) == NULL
5094 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
5097 /* Find the type of the method. */
5098 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
5099 if (pfn_type
== NULL
5100 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
5101 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
5104 /* Look for the "this" argument. */
5105 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
5106 if (TYPE_NFIELDS (pfn_type
) == 0
5107 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
5108 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
5111 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
5112 new_type
= alloc_type (objfile
);
5113 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
5114 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
5115 TYPE_VARARGS (pfn_type
));
5116 smash_to_methodptr_type (type
, new_type
);
5119 /* Called when we find the DIE that starts a structure or union scope
5120 (definition) to process all dies that define the members of the
5123 NOTE: we need to call struct_type regardless of whether or not the
5124 DIE has an at_name attribute, since it might be an anonymous
5125 structure or union. This gets the type entered into our set of
5128 However, if the structure is incomplete (an opaque struct/union)
5129 then suppress creating a symbol table entry for it since gdb only
5130 wants to find the one with the complete definition. Note that if
5131 it is complete, we just call new_symbol, which does it's own
5132 checking about whether the struct/union is anonymous or not (and
5133 suppresses creating a symbol table entry itself). */
5135 static struct type
*
5136 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5138 struct objfile
*objfile
= cu
->objfile
;
5140 struct attribute
*attr
;
5142 struct cleanup
*back_to
;
5144 /* If the definition of this type lives in .debug_types, read that type.
5145 Don't follow DW_AT_specification though, that will take us back up
5146 the chain and we want to go down. */
5147 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5150 struct dwarf2_cu
*type_cu
= cu
;
5151 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5153 /* We could just recurse on read_structure_type, but we need to call
5154 get_die_type to ensure only one type for this DIE is created.
5155 This is important, for example, because for c++ classes we need
5156 TYPE_NAME set which is only done by new_symbol. Blech. */
5157 type
= read_type_die (type_die
, type_cu
);
5158 return set_die_type (die
, type
, cu
);
5161 back_to
= make_cleanup (null_cleanup
, 0);
5163 type
= alloc_type (objfile
);
5164 INIT_CPLUS_SPECIFIC (type
);
5166 name
= dwarf2_name (die
, cu
);
5169 if (cu
->language
== language_cplus
5170 || cu
->language
== language_java
)
5172 TYPE_TAG_NAME (type
) = (char *) dwarf2_full_name (name
, die
, cu
);
5173 if (die
->tag
== DW_TAG_structure_type
5174 || die
->tag
== DW_TAG_class_type
)
5175 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5179 /* The name is already allocated along with this objfile, so
5180 we don't need to duplicate it for the type. */
5181 TYPE_TAG_NAME (type
) = (char *) name
;
5182 if (die
->tag
== DW_TAG_class_type
)
5183 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5187 if (die
->tag
== DW_TAG_structure_type
)
5189 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5191 else if (die
->tag
== DW_TAG_union_type
)
5193 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5197 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5200 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
5201 TYPE_DECLARED_CLASS (type
) = 1;
5203 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5206 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5210 TYPE_LENGTH (type
) = 0;
5213 TYPE_STUB_SUPPORTED (type
) = 1;
5214 if (die_is_declaration (die
, cu
))
5215 TYPE_STUB (type
) = 1;
5216 else if (attr
== NULL
&& die
->child
== NULL
5217 && producer_is_realview (cu
->producer
))
5218 /* RealView does not output the required DW_AT_declaration
5219 on incomplete types. */
5220 TYPE_STUB (type
) = 1;
5222 /* We need to add the type field to the die immediately so we don't
5223 infinitely recurse when dealing with pointers to the structure
5224 type within the structure itself. */
5225 set_die_type (die
, type
, cu
);
5227 /* set_die_type should be already done. */
5228 set_descriptive_type (type
, die
, cu
);
5230 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5232 struct field_info fi
;
5233 struct die_info
*child_die
;
5235 memset (&fi
, 0, sizeof (struct field_info
));
5237 child_die
= die
->child
;
5239 while (child_die
&& child_die
->tag
)
5241 if (child_die
->tag
== DW_TAG_member
5242 || child_die
->tag
== DW_TAG_variable
)
5244 /* NOTE: carlton/2002-11-05: A C++ static data member
5245 should be a DW_TAG_member that is a declaration, but
5246 all versions of G++ as of this writing (so through at
5247 least 3.2.1) incorrectly generate DW_TAG_variable
5248 tags for them instead. */
5249 dwarf2_add_field (&fi
, child_die
, cu
);
5251 else if (child_die
->tag
== DW_TAG_subprogram
)
5253 /* C++ member function. */
5254 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5256 else if (child_die
->tag
== DW_TAG_inheritance
)
5258 /* C++ base class field. */
5259 dwarf2_add_field (&fi
, child_die
, cu
);
5261 else if (child_die
->tag
== DW_TAG_typedef
)
5262 dwarf2_add_typedef (&fi
, child_die
, cu
);
5263 child_die
= sibling_die (child_die
);
5266 /* Attach fields and member functions to the type. */
5268 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5271 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5273 /* Get the type which refers to the base class (possibly this
5274 class itself) which contains the vtable pointer for the current
5275 class from the DW_AT_containing_type attribute. This use of
5276 DW_AT_containing_type is a GNU extension. */
5278 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5280 struct type
*t
= die_containing_type (die
, cu
);
5282 TYPE_VPTR_BASETYPE (type
) = t
;
5287 /* Our own class provides vtbl ptr. */
5288 for (i
= TYPE_NFIELDS (t
) - 1;
5289 i
>= TYPE_N_BASECLASSES (t
);
5292 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5294 if (is_vtable_name (fieldname
, cu
))
5296 TYPE_VPTR_FIELDNO (type
) = i
;
5301 /* Complain if virtual function table field not found. */
5302 if (i
< TYPE_N_BASECLASSES (t
))
5303 complaint (&symfile_complaints
,
5304 _("virtual function table pointer not found when defining class '%s'"),
5305 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5310 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5313 else if (cu
->producer
5314 && strncmp (cu
->producer
,
5315 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5317 /* The IBM XLC compiler does not provide direct indication
5318 of the containing type, but the vtable pointer is
5319 always named __vfp. */
5323 for (i
= TYPE_NFIELDS (type
) - 1;
5324 i
>= TYPE_N_BASECLASSES (type
);
5327 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5329 TYPE_VPTR_FIELDNO (type
) = i
;
5330 TYPE_VPTR_BASETYPE (type
) = type
;
5337 /* Copy fi.typedef_field_list linked list elements content into the
5338 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
5339 if (fi
.typedef_field_list
)
5341 int i
= fi
.typedef_field_list_count
;
5343 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
5344 TYPE_TYPEDEF_FIELD_ARRAY (type
)
5345 = TYPE_ALLOC (type
, sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * i
);
5346 TYPE_TYPEDEF_FIELD_COUNT (type
) = i
;
5348 /* Reverse the list order to keep the debug info elements order. */
5351 struct typedef_field
*dest
, *src
;
5353 dest
= &TYPE_TYPEDEF_FIELD (type
, i
);
5354 src
= &fi
.typedef_field_list
->field
;
5355 fi
.typedef_field_list
= fi
.typedef_field_list
->next
;
5361 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
5363 do_cleanups (back_to
);
5368 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5370 struct die_info
*child_die
= die
->child
;
5371 struct type
*this_type
;
5373 this_type
= get_die_type (die
, cu
);
5374 if (this_type
== NULL
)
5375 this_type
= read_structure_type (die
, cu
);
5377 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5378 snapshots) has been known to create a die giving a declaration
5379 for a class that has, as a child, a die giving a definition for a
5380 nested class. So we have to process our children even if the
5381 current die is a declaration. Normally, of course, a declaration
5382 won't have any children at all. */
5384 while (child_die
!= NULL
&& child_die
->tag
)
5386 if (child_die
->tag
== DW_TAG_member
5387 || child_die
->tag
== DW_TAG_variable
5388 || child_die
->tag
== DW_TAG_inheritance
)
5393 process_die (child_die
, cu
);
5395 child_die
= sibling_die (child_die
);
5398 /* Do not consider external references. According to the DWARF standard,
5399 these DIEs are identified by the fact that they have no byte_size
5400 attribute, and a declaration attribute. */
5401 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5402 || !die_is_declaration (die
, cu
))
5403 new_symbol (die
, this_type
, cu
);
5406 /* Given a DW_AT_enumeration_type die, set its type. We do not
5407 complete the type's fields yet, or create any symbols. */
5409 static struct type
*
5410 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5412 struct objfile
*objfile
= cu
->objfile
;
5414 struct attribute
*attr
;
5417 /* If the definition of this type lives in .debug_types, read that type.
5418 Don't follow DW_AT_specification though, that will take us back up
5419 the chain and we want to go down. */
5420 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5423 struct dwarf2_cu
*type_cu
= cu
;
5424 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5426 type
= read_type_die (type_die
, type_cu
);
5427 return set_die_type (die
, type
, cu
);
5430 type
= alloc_type (objfile
);
5432 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5433 name
= dwarf2_full_name (NULL
, die
, cu
);
5435 TYPE_TAG_NAME (type
) = (char *) name
;
5437 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5440 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5444 TYPE_LENGTH (type
) = 0;
5447 /* The enumeration DIE can be incomplete. In Ada, any type can be
5448 declared as private in the package spec, and then defined only
5449 inside the package body. Such types are known as Taft Amendment
5450 Types. When another package uses such a type, an incomplete DIE
5451 may be generated by the compiler. */
5452 if (die_is_declaration (die
, cu
))
5453 TYPE_STUB (type
) = 1;
5455 return set_die_type (die
, type
, cu
);
5458 /* Given a pointer to a die which begins an enumeration, process all
5459 the dies that define the members of the enumeration, and create the
5460 symbol for the enumeration type.
5462 NOTE: We reverse the order of the element list. */
5465 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5467 struct die_info
*child_die
;
5468 struct field
*fields
;
5471 int unsigned_enum
= 1;
5473 struct type
*this_type
;
5477 this_type
= get_die_type (die
, cu
);
5478 if (this_type
== NULL
)
5479 this_type
= read_enumeration_type (die
, cu
);
5480 if (die
->child
!= NULL
)
5482 child_die
= die
->child
;
5483 while (child_die
&& child_die
->tag
)
5485 if (child_die
->tag
!= DW_TAG_enumerator
)
5487 process_die (child_die
, cu
);
5491 name
= dwarf2_name (child_die
, cu
);
5494 sym
= new_symbol (child_die
, this_type
, cu
);
5495 if (SYMBOL_VALUE (sym
) < 0)
5498 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5500 fields
= (struct field
*)
5502 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5503 * sizeof (struct field
));
5506 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5507 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5508 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5509 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5515 child_die
= sibling_die (child_die
);
5520 TYPE_NFIELDS (this_type
) = num_fields
;
5521 TYPE_FIELDS (this_type
) = (struct field
*)
5522 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5523 memcpy (TYPE_FIELDS (this_type
), fields
,
5524 sizeof (struct field
) * num_fields
);
5528 TYPE_UNSIGNED (this_type
) = 1;
5531 new_symbol (die
, this_type
, cu
);
5534 /* Extract all information from a DW_TAG_array_type DIE and put it in
5535 the DIE's type field. For now, this only handles one dimensional
5538 static struct type
*
5539 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5541 struct objfile
*objfile
= cu
->objfile
;
5542 struct die_info
*child_die
;
5544 struct type
*element_type
, *range_type
, *index_type
;
5545 struct type
**range_types
= NULL
;
5546 struct attribute
*attr
;
5548 struct cleanup
*back_to
;
5551 element_type
= die_type (die
, cu
);
5553 /* The die_type call above may have already set the type for this DIE. */
5554 type
= get_die_type (die
, cu
);
5558 /* Irix 6.2 native cc creates array types without children for
5559 arrays with unspecified length. */
5560 if (die
->child
== NULL
)
5562 index_type
= objfile_type (objfile
)->builtin_int
;
5563 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5564 type
= create_array_type (NULL
, element_type
, range_type
);
5565 return set_die_type (die
, type
, cu
);
5568 back_to
= make_cleanup (null_cleanup
, NULL
);
5569 child_die
= die
->child
;
5570 while (child_die
&& child_die
->tag
)
5572 if (child_die
->tag
== DW_TAG_subrange_type
)
5574 struct type
*child_type
= read_type_die (child_die
, cu
);
5576 if (child_type
!= NULL
)
5578 /* The range type was succesfully read. Save it for
5579 the array type creation. */
5580 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5582 range_types
= (struct type
**)
5583 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5584 * sizeof (struct type
*));
5586 make_cleanup (free_current_contents
, &range_types
);
5588 range_types
[ndim
++] = child_type
;
5591 child_die
= sibling_die (child_die
);
5594 /* Dwarf2 dimensions are output from left to right, create the
5595 necessary array types in backwards order. */
5597 type
= element_type
;
5599 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5604 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5609 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5612 /* Understand Dwarf2 support for vector types (like they occur on
5613 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5614 array type. This is not part of the Dwarf2/3 standard yet, but a
5615 custom vendor extension. The main difference between a regular
5616 array and the vector variant is that vectors are passed by value
5618 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5620 make_vector_type (type
);
5622 name
= dwarf2_name (die
, cu
);
5624 TYPE_NAME (type
) = name
;
5626 /* Install the type in the die. */
5627 set_die_type (die
, type
, cu
);
5629 /* set_die_type should be already done. */
5630 set_descriptive_type (type
, die
, cu
);
5632 do_cleanups (back_to
);
5637 static enum dwarf_array_dim_ordering
5638 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5640 struct attribute
*attr
;
5642 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5644 if (attr
) return DW_SND (attr
);
5647 GNU F77 is a special case, as at 08/2004 array type info is the
5648 opposite order to the dwarf2 specification, but data is still
5649 laid out as per normal fortran.
5651 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5655 if (cu
->language
== language_fortran
5656 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5658 return DW_ORD_row_major
;
5661 switch (cu
->language_defn
->la_array_ordering
)
5663 case array_column_major
:
5664 return DW_ORD_col_major
;
5665 case array_row_major
:
5667 return DW_ORD_row_major
;
5671 /* Extract all information from a DW_TAG_set_type DIE and put it in
5672 the DIE's type field. */
5674 static struct type
*
5675 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5677 struct type
*domain_type
, *set_type
;
5678 struct attribute
*attr
;
5680 domain_type
= die_type (die
, cu
);
5682 /* The die_type call above may have already set the type for this DIE. */
5683 set_type
= get_die_type (die
, cu
);
5687 set_type
= create_set_type (NULL
, domain_type
);
5689 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5691 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
5693 return set_die_type (die
, set_type
, cu
);
5696 /* First cut: install each common block member as a global variable. */
5699 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5701 struct die_info
*child_die
;
5702 struct attribute
*attr
;
5704 CORE_ADDR base
= (CORE_ADDR
) 0;
5706 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5709 /* Support the .debug_loc offsets */
5710 if (attr_form_is_block (attr
))
5712 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5714 else if (attr_form_is_section_offset (attr
))
5716 dwarf2_complex_location_expr_complaint ();
5720 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5721 "common block member");
5724 if (die
->child
!= NULL
)
5726 child_die
= die
->child
;
5727 while (child_die
&& child_die
->tag
)
5729 sym
= new_symbol (child_die
, NULL
, cu
);
5730 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5733 CORE_ADDR byte_offset
= 0;
5735 if (attr_form_is_section_offset (attr
))
5736 dwarf2_complex_location_expr_complaint ();
5737 else if (attr_form_is_constant (attr
))
5738 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5739 else if (attr_form_is_block (attr
))
5740 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5742 dwarf2_complex_location_expr_complaint ();
5744 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5745 add_symbol_to_list (sym
, &global_symbols
);
5747 child_die
= sibling_die (child_die
);
5752 /* Create a type for a C++ namespace. */
5754 static struct type
*
5755 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5757 struct objfile
*objfile
= cu
->objfile
;
5758 const char *previous_prefix
, *name
;
5762 /* For extensions, reuse the type of the original namespace. */
5763 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5765 struct die_info
*ext_die
;
5766 struct dwarf2_cu
*ext_cu
= cu
;
5768 ext_die
= dwarf2_extension (die
, &ext_cu
);
5769 type
= read_type_die (ext_die
, ext_cu
);
5770 return set_die_type (die
, type
, cu
);
5773 name
= namespace_name (die
, &is_anonymous
, cu
);
5775 /* Now build the name of the current namespace. */
5777 previous_prefix
= determine_prefix (die
, cu
);
5778 if (previous_prefix
[0] != '\0')
5779 name
= typename_concat (&objfile
->objfile_obstack
,
5780 previous_prefix
, name
, 0, cu
);
5782 /* Create the type. */
5783 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5785 TYPE_NAME (type
) = (char *) name
;
5786 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5788 return set_die_type (die
, type
, cu
);
5791 /* Read a C++ namespace. */
5794 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5796 struct objfile
*objfile
= cu
->objfile
;
5800 /* Add a symbol associated to this if we haven't seen the namespace
5801 before. Also, add a using directive if it's an anonymous
5804 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5808 type
= read_type_die (die
, cu
);
5809 new_symbol (die
, type
, cu
);
5811 name
= namespace_name (die
, &is_anonymous
, cu
);
5814 const char *previous_prefix
= determine_prefix (die
, cu
);
5816 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
5817 NULL
, &objfile
->objfile_obstack
);
5821 if (die
->child
!= NULL
)
5823 struct die_info
*child_die
= die
->child
;
5825 while (child_die
&& child_die
->tag
)
5827 process_die (child_die
, cu
);
5828 child_die
= sibling_die (child_die
);
5833 /* Read a Fortran module as type. This DIE can be only a declaration used for
5834 imported module. Still we need that type as local Fortran "use ... only"
5835 declaration imports depend on the created type in determine_prefix. */
5837 static struct type
*
5838 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5840 struct objfile
*objfile
= cu
->objfile
;
5844 module_name
= dwarf2_name (die
, cu
);
5846 complaint (&symfile_complaints
, _("DW_TAG_module has no name, offset 0x%x"),
5848 type
= init_type (TYPE_CODE_MODULE
, 0, 0, module_name
, objfile
);
5850 /* determine_prefix uses TYPE_TAG_NAME. */
5851 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5853 return set_die_type (die
, type
, cu
);
5856 /* Read a Fortran module. */
5859 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5861 struct die_info
*child_die
= die
->child
;
5863 while (child_die
&& child_die
->tag
)
5865 process_die (child_die
, cu
);
5866 child_die
= sibling_die (child_die
);
5870 /* Return the name of the namespace represented by DIE. Set
5871 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5875 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5877 struct die_info
*current_die
;
5878 const char *name
= NULL
;
5880 /* Loop through the extensions until we find a name. */
5882 for (current_die
= die
;
5883 current_die
!= NULL
;
5884 current_die
= dwarf2_extension (die
, &cu
))
5886 name
= dwarf2_name (current_die
, cu
);
5891 /* Is it an anonymous namespace? */
5893 *is_anonymous
= (name
== NULL
);
5895 name
= "(anonymous namespace)";
5900 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5901 the user defined type vector. */
5903 static struct type
*
5904 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5906 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5907 struct comp_unit_head
*cu_header
= &cu
->header
;
5909 struct attribute
*attr_byte_size
;
5910 struct attribute
*attr_address_class
;
5911 int byte_size
, addr_class
;
5912 struct type
*target_type
;
5914 target_type
= die_type (die
, cu
);
5916 /* The die_type call above may have already set the type for this DIE. */
5917 type
= get_die_type (die
, cu
);
5921 type
= lookup_pointer_type (target_type
);
5923 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5925 byte_size
= DW_UNSND (attr_byte_size
);
5927 byte_size
= cu_header
->addr_size
;
5929 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5930 if (attr_address_class
)
5931 addr_class
= DW_UNSND (attr_address_class
);
5933 addr_class
= DW_ADDR_none
;
5935 /* If the pointer size or address class is different than the
5936 default, create a type variant marked as such and set the
5937 length accordingly. */
5938 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5940 if (gdbarch_address_class_type_flags_p (gdbarch
))
5944 type_flags
= gdbarch_address_class_type_flags
5945 (gdbarch
, byte_size
, addr_class
);
5946 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5948 type
= make_type_with_address_space (type
, type_flags
);
5950 else if (TYPE_LENGTH (type
) != byte_size
)
5952 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5956 /* Should we also complain about unhandled address classes? */
5960 TYPE_LENGTH (type
) = byte_size
;
5961 return set_die_type (die
, type
, cu
);
5964 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5965 the user defined type vector. */
5967 static struct type
*
5968 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5971 struct type
*to_type
;
5972 struct type
*domain
;
5974 to_type
= die_type (die
, cu
);
5975 domain
= die_containing_type (die
, cu
);
5977 /* The calls above may have already set the type for this DIE. */
5978 type
= get_die_type (die
, cu
);
5982 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5983 type
= lookup_methodptr_type (to_type
);
5985 type
= lookup_memberptr_type (to_type
, domain
);
5987 return set_die_type (die
, type
, cu
);
5990 /* Extract all information from a DW_TAG_reference_type DIE and add to
5991 the user defined type vector. */
5993 static struct type
*
5994 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5996 struct comp_unit_head
*cu_header
= &cu
->header
;
5997 struct type
*type
, *target_type
;
5998 struct attribute
*attr
;
6000 target_type
= die_type (die
, cu
);
6002 /* The die_type call above may have already set the type for this DIE. */
6003 type
= get_die_type (die
, cu
);
6007 type
= lookup_reference_type (target_type
);
6008 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6011 TYPE_LENGTH (type
) = DW_UNSND (attr
);
6015 TYPE_LENGTH (type
) = cu_header
->addr_size
;
6017 return set_die_type (die
, type
, cu
);
6020 static struct type
*
6021 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6023 struct type
*base_type
, *cv_type
;
6025 base_type
= die_type (die
, cu
);
6027 /* The die_type call above may have already set the type for this DIE. */
6028 cv_type
= get_die_type (die
, cu
);
6032 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
6033 return set_die_type (die
, cv_type
, cu
);
6036 static struct type
*
6037 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6039 struct type
*base_type
, *cv_type
;
6041 base_type
= die_type (die
, cu
);
6043 /* The die_type call above may have already set the type for this DIE. */
6044 cv_type
= get_die_type (die
, cu
);
6048 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
6049 return set_die_type (die
, cv_type
, cu
);
6052 /* Extract all information from a DW_TAG_string_type DIE and add to
6053 the user defined type vector. It isn't really a user defined type,
6054 but it behaves like one, with other DIE's using an AT_user_def_type
6055 attribute to reference it. */
6057 static struct type
*
6058 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6060 struct objfile
*objfile
= cu
->objfile
;
6061 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6062 struct type
*type
, *range_type
, *index_type
, *char_type
;
6063 struct attribute
*attr
;
6064 unsigned int length
;
6066 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
6069 length
= DW_UNSND (attr
);
6073 /* check for the DW_AT_byte_size attribute */
6074 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6077 length
= DW_UNSND (attr
);
6085 index_type
= objfile_type (objfile
)->builtin_int
;
6086 range_type
= create_range_type (NULL
, index_type
, 1, length
);
6087 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
6088 type
= create_string_type (NULL
, char_type
, range_type
);
6090 return set_die_type (die
, type
, cu
);
6093 /* Handle DIES due to C code like:
6097 int (*funcp)(int a, long l);
6101 ('funcp' generates a DW_TAG_subroutine_type DIE)
6104 static struct type
*
6105 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6107 struct type
*type
; /* Type that this function returns */
6108 struct type
*ftype
; /* Function that returns above type */
6109 struct attribute
*attr
;
6111 type
= die_type (die
, cu
);
6113 /* The die_type call above may have already set the type for this DIE. */
6114 ftype
= get_die_type (die
, cu
);
6118 ftype
= lookup_function_type (type
);
6120 /* All functions in C++, Pascal and Java have prototypes. */
6121 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
6122 if ((attr
&& (DW_UNSND (attr
) != 0))
6123 || cu
->language
== language_cplus
6124 || cu
->language
== language_java
6125 || cu
->language
== language_pascal
)
6126 TYPE_PROTOTYPED (ftype
) = 1;
6127 else if (producer_is_realview (cu
->producer
))
6128 /* RealView does not emit DW_AT_prototyped. We can not
6129 distinguish prototyped and unprototyped functions; default to
6130 prototyped, since that is more common in modern code (and
6131 RealView warns about unprototyped functions). */
6132 TYPE_PROTOTYPED (ftype
) = 1;
6134 /* Store the calling convention in the type if it's available in
6135 the subroutine die. Otherwise set the calling convention to
6136 the default value DW_CC_normal. */
6137 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
6138 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
6140 /* We need to add the subroutine type to the die immediately so
6141 we don't infinitely recurse when dealing with parameters
6142 declared as the same subroutine type. */
6143 set_die_type (die
, ftype
, cu
);
6145 if (die
->child
!= NULL
)
6147 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
6148 struct die_info
*child_die
;
6149 int nparams
, iparams
;
6151 /* Count the number of parameters.
6152 FIXME: GDB currently ignores vararg functions, but knows about
6153 vararg member functions. */
6155 child_die
= die
->child
;
6156 while (child_die
&& child_die
->tag
)
6158 if (child_die
->tag
== DW_TAG_formal_parameter
)
6160 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
6161 TYPE_VARARGS (ftype
) = 1;
6162 child_die
= sibling_die (child_die
);
6165 /* Allocate storage for parameters and fill them in. */
6166 TYPE_NFIELDS (ftype
) = nparams
;
6167 TYPE_FIELDS (ftype
) = (struct field
*)
6168 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
6170 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
6171 even if we error out during the parameters reading below. */
6172 for (iparams
= 0; iparams
< nparams
; iparams
++)
6173 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
6176 child_die
= die
->child
;
6177 while (child_die
&& child_die
->tag
)
6179 if (child_die
->tag
== DW_TAG_formal_parameter
)
6181 /* Dwarf2 has no clean way to discern C++ static and non-static
6182 member functions. G++ helps GDB by marking the first
6183 parameter for non-static member functions (which is the
6184 this pointer) as artificial. We pass this information
6185 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
6186 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
6188 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
6191 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
6193 /* GCC/43521: In java, the formal parameter
6194 "this" is sometimes not marked with DW_AT_artificial. */
6195 if (cu
->language
== language_java
)
6197 const char *name
= dwarf2_name (child_die
, cu
);
6199 if (name
&& !strcmp (name
, "this"))
6200 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
6203 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
6206 child_die
= sibling_die (child_die
);
6213 static struct type
*
6214 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
6216 struct objfile
*objfile
= cu
->objfile
;
6217 const char *name
= NULL
;
6218 struct type
*this_type
;
6220 name
= dwarf2_full_name (NULL
, die
, cu
);
6221 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
6222 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
6223 TYPE_NAME (this_type
) = (char *) name
;
6224 set_die_type (die
, this_type
, cu
);
6225 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
6229 /* Find a representation of a given base type and install
6230 it in the TYPE field of the die. */
6232 static struct type
*
6233 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6235 struct objfile
*objfile
= cu
->objfile
;
6237 struct attribute
*attr
;
6238 int encoding
= 0, size
= 0;
6240 enum type_code code
= TYPE_CODE_INT
;
6242 struct type
*target_type
= NULL
;
6244 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
6247 encoding
= DW_UNSND (attr
);
6249 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6252 size
= DW_UNSND (attr
);
6254 name
= dwarf2_name (die
, cu
);
6257 complaint (&symfile_complaints
,
6258 _("DW_AT_name missing from DW_TAG_base_type"));
6263 case DW_ATE_address
:
6264 /* Turn DW_ATE_address into a void * pointer. */
6265 code
= TYPE_CODE_PTR
;
6266 type_flags
|= TYPE_FLAG_UNSIGNED
;
6267 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
6269 case DW_ATE_boolean
:
6270 code
= TYPE_CODE_BOOL
;
6271 type_flags
|= TYPE_FLAG_UNSIGNED
;
6273 case DW_ATE_complex_float
:
6274 code
= TYPE_CODE_COMPLEX
;
6275 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
6277 case DW_ATE_decimal_float
:
6278 code
= TYPE_CODE_DECFLOAT
;
6281 code
= TYPE_CODE_FLT
;
6285 case DW_ATE_unsigned
:
6286 type_flags
|= TYPE_FLAG_UNSIGNED
;
6288 case DW_ATE_signed_char
:
6289 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6290 || cu
->language
== language_pascal
)
6291 code
= TYPE_CODE_CHAR
;
6293 case DW_ATE_unsigned_char
:
6294 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6295 || cu
->language
== language_pascal
)
6296 code
= TYPE_CODE_CHAR
;
6297 type_flags
|= TYPE_FLAG_UNSIGNED
;
6300 /* We just treat this as an integer and then recognize the
6301 type by name elsewhere. */
6305 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6306 dwarf_type_encoding_name (encoding
));
6310 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6311 TYPE_NAME (type
) = name
;
6312 TYPE_TARGET_TYPE (type
) = target_type
;
6314 if (name
&& strcmp (name
, "char") == 0)
6315 TYPE_NOSIGN (type
) = 1;
6317 return set_die_type (die
, type
, cu
);
6320 /* Read the given DW_AT_subrange DIE. */
6322 static struct type
*
6323 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6325 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6326 struct type
*base_type
;
6327 struct type
*range_type
;
6328 struct attribute
*attr
;
6332 LONGEST negative_mask
;
6334 base_type
= die_type (die
, cu
);
6335 /* Preserve BASE_TYPE's original type, just set its LENGTH. */
6336 check_typedef (base_type
);
6338 /* The die_type call above may have already set the type for this DIE. */
6339 range_type
= get_die_type (die
, cu
);
6343 if (cu
->language
== language_fortran
)
6345 /* FORTRAN implies a lower bound of 1, if not given. */
6349 /* FIXME: For variable sized arrays either of these could be
6350 a variable rather than a constant value. We'll allow it,
6351 but we don't know how to handle it. */
6352 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6354 low
= dwarf2_get_attr_constant_value (attr
, 0);
6356 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6359 if (attr
->form
== DW_FORM_block1
|| is_ref_attr (attr
))
6361 /* GCC encodes arrays with unspecified or dynamic length
6362 with a DW_FORM_block1 attribute or a reference attribute.
6363 FIXME: GDB does not yet know how to handle dynamic
6364 arrays properly, treat them as arrays with unspecified
6367 FIXME: jimb/2003-09-22: GDB does not really know
6368 how to handle arrays of unspecified length
6369 either; we just represent them as zero-length
6370 arrays. Choose an appropriate upper bound given
6371 the lower bound we've computed above. */
6375 high
= dwarf2_get_attr_constant_value (attr
, 1);
6379 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
6382 int count
= dwarf2_get_attr_constant_value (attr
, 1);
6383 high
= low
+ count
- 1;
6387 /* Dwarf-2 specifications explicitly allows to create subrange types
6388 without specifying a base type.
6389 In that case, the base type must be set to the type of
6390 the lower bound, upper bound or count, in that order, if any of these
6391 three attributes references an object that has a type.
6392 If no base type is found, the Dwarf-2 specifications say that
6393 a signed integer type of size equal to the size of an address should
6395 For the following C code: `extern char gdb_int [];'
6396 GCC produces an empty range DIE.
6397 FIXME: muller/2010-05-28: Possible references to object for low bound,
6398 high bound or count are not yet handled by this code.
6400 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6402 struct objfile
*objfile
= cu
->objfile
;
6403 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
6404 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
6405 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
6407 /* Test "int", "long int", and "long long int" objfile types,
6408 and select the first one having a size above or equal to the
6409 architecture address size. */
6410 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
6411 base_type
= int_type
;
6414 int_type
= objfile_type (objfile
)->builtin_long
;
6415 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
6416 base_type
= int_type
;
6419 int_type
= objfile_type (objfile
)->builtin_long_long
;
6420 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
6421 base_type
= int_type
;
6427 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
6428 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
6429 low
|= negative_mask
;
6430 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
6431 high
|= negative_mask
;
6433 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6435 /* Mark arrays with dynamic length at least as an array of unspecified
6436 length. GDB could check the boundary but before it gets implemented at
6437 least allow accessing the array elements. */
6438 if (attr
&& attr
->form
== DW_FORM_block1
)
6439 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
6441 name
= dwarf2_name (die
, cu
);
6443 TYPE_NAME (range_type
) = name
;
6445 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6447 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6449 set_die_type (die
, range_type
, cu
);
6451 /* set_die_type should be already done. */
6452 set_descriptive_type (range_type
, die
, cu
);
6457 static struct type
*
6458 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6462 /* For now, we only support the C meaning of an unspecified type: void. */
6464 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6465 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6467 return set_die_type (die
, type
, cu
);
6470 /* Trivial hash function for die_info: the hash value of a DIE
6471 is its offset in .debug_info for this objfile. */
6474 die_hash (const void *item
)
6476 const struct die_info
*die
= item
;
6481 /* Trivial comparison function for die_info structures: two DIEs
6482 are equal if they have the same offset. */
6485 die_eq (const void *item_lhs
, const void *item_rhs
)
6487 const struct die_info
*die_lhs
= item_lhs
;
6488 const struct die_info
*die_rhs
= item_rhs
;
6490 return die_lhs
->offset
== die_rhs
->offset
;
6493 /* Read a whole compilation unit into a linked list of dies. */
6495 static struct die_info
*
6496 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6498 struct die_reader_specs reader_specs
;
6500 gdb_assert (cu
->die_hash
== NULL
);
6502 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6506 &cu
->comp_unit_obstack
,
6507 hashtab_obstack_allocate
,
6508 dummy_obstack_deallocate
);
6510 init_cu_die_reader (&reader_specs
, cu
);
6512 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6515 /* Main entry point for reading a DIE and all children.
6516 Read the DIE and dump it if requested. */
6518 static struct die_info
*
6519 read_die_and_children (const struct die_reader_specs
*reader
,
6521 gdb_byte
**new_info_ptr
,
6522 struct die_info
*parent
)
6524 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6525 new_info_ptr
, parent
);
6527 if (dwarf2_die_debug
)
6529 fprintf_unfiltered (gdb_stdlog
,
6530 "\nRead die from %s of %s:\n",
6531 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6533 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6535 : "unknown section",
6536 reader
->abfd
->filename
);
6537 dump_die (result
, dwarf2_die_debug
);
6543 /* Read a single die and all its descendents. Set the die's sibling
6544 field to NULL; set other fields in the die correctly, and set all
6545 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6546 location of the info_ptr after reading all of those dies. PARENT
6547 is the parent of the die in question. */
6549 static struct die_info
*
6550 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6552 gdb_byte
**new_info_ptr
,
6553 struct die_info
*parent
)
6555 struct die_info
*die
;
6559 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6562 *new_info_ptr
= cur_ptr
;
6565 store_in_ref_table (die
, reader
->cu
);
6568 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6572 *new_info_ptr
= cur_ptr
;
6575 die
->sibling
= NULL
;
6576 die
->parent
= parent
;
6580 /* Read a die, all of its descendents, and all of its siblings; set
6581 all of the fields of all of the dies correctly. Arguments are as
6582 in read_die_and_children. */
6584 static struct die_info
*
6585 read_die_and_siblings (const struct die_reader_specs
*reader
,
6587 gdb_byte
**new_info_ptr
,
6588 struct die_info
*parent
)
6590 struct die_info
*first_die
, *last_sibling
;
6594 first_die
= last_sibling
= NULL
;
6598 struct die_info
*die
6599 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6603 *new_info_ptr
= cur_ptr
;
6610 last_sibling
->sibling
= die
;
6616 /* Read the die from the .debug_info section buffer. Set DIEP to
6617 point to a newly allocated die with its information, except for its
6618 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6619 whether the die has children or not. */
6622 read_full_die (const struct die_reader_specs
*reader
,
6623 struct die_info
**diep
, gdb_byte
*info_ptr
,
6626 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6627 struct abbrev_info
*abbrev
;
6628 struct die_info
*die
;
6629 struct dwarf2_cu
*cu
= reader
->cu
;
6630 bfd
*abfd
= reader
->abfd
;
6632 offset
= info_ptr
- reader
->buffer
;
6633 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6634 info_ptr
+= bytes_read
;
6642 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6644 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6646 bfd_get_filename (abfd
));
6648 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6649 die
->offset
= offset
;
6650 die
->tag
= abbrev
->tag
;
6651 die
->abbrev
= abbrev_number
;
6653 die
->num_attrs
= abbrev
->num_attrs
;
6655 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6656 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6657 abfd
, info_ptr
, cu
);
6660 *has_children
= abbrev
->has_children
;
6664 /* In DWARF version 2, the description of the debugging information is
6665 stored in a separate .debug_abbrev section. Before we read any
6666 dies from a section we read in all abbreviations and install them
6667 in a hash table. This function also sets flags in CU describing
6668 the data found in the abbrev table. */
6671 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6673 struct comp_unit_head
*cu_header
= &cu
->header
;
6674 gdb_byte
*abbrev_ptr
;
6675 struct abbrev_info
*cur_abbrev
;
6676 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6677 unsigned int abbrev_form
, hash_number
;
6678 struct attr_abbrev
*cur_attrs
;
6679 unsigned int allocated_attrs
;
6681 /* Initialize dwarf2 abbrevs */
6682 obstack_init (&cu
->abbrev_obstack
);
6683 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6685 * sizeof (struct abbrev_info
*)));
6686 memset (cu
->dwarf2_abbrevs
, 0,
6687 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6689 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
6690 &dwarf2_per_objfile
->abbrev
);
6691 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6692 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6693 abbrev_ptr
+= bytes_read
;
6695 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6696 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6698 /* loop until we reach an abbrev number of 0 */
6699 while (abbrev_number
)
6701 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6703 /* read in abbrev header */
6704 cur_abbrev
->number
= abbrev_number
;
6705 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6706 abbrev_ptr
+= bytes_read
;
6707 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6710 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6711 cu
->has_namespace_info
= 1;
6713 /* now read in declarations */
6714 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6715 abbrev_ptr
+= bytes_read
;
6716 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6717 abbrev_ptr
+= bytes_read
;
6720 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6722 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6724 = xrealloc (cur_attrs
, (allocated_attrs
6725 * sizeof (struct attr_abbrev
)));
6728 /* Record whether this compilation unit might have
6729 inter-compilation-unit references. If we don't know what form
6730 this attribute will have, then it might potentially be a
6731 DW_FORM_ref_addr, so we conservatively expect inter-CU
6734 if (abbrev_form
== DW_FORM_ref_addr
6735 || abbrev_form
== DW_FORM_indirect
)
6736 cu
->has_form_ref_addr
= 1;
6738 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6739 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6740 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6741 abbrev_ptr
+= bytes_read
;
6742 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6743 abbrev_ptr
+= bytes_read
;
6746 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6747 (cur_abbrev
->num_attrs
6748 * sizeof (struct attr_abbrev
)));
6749 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6750 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6752 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6753 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6754 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6756 /* Get next abbreviation.
6757 Under Irix6 the abbreviations for a compilation unit are not
6758 always properly terminated with an abbrev number of 0.
6759 Exit loop if we encounter an abbreviation which we have
6760 already read (which means we are about to read the abbreviations
6761 for the next compile unit) or if the end of the abbreviation
6762 table is reached. */
6763 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6764 >= dwarf2_per_objfile
->abbrev
.size
)
6766 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6767 abbrev_ptr
+= bytes_read
;
6768 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6775 /* Release the memory used by the abbrev table for a compilation unit. */
6778 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6780 struct dwarf2_cu
*cu
= ptr_to_cu
;
6782 obstack_free (&cu
->abbrev_obstack
, NULL
);
6783 cu
->dwarf2_abbrevs
= NULL
;
6786 /* Lookup an abbrev_info structure in the abbrev hash table. */
6788 static struct abbrev_info
*
6789 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6791 unsigned int hash_number
;
6792 struct abbrev_info
*abbrev
;
6794 hash_number
= number
% ABBREV_HASH_SIZE
;
6795 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6799 if (abbrev
->number
== number
)
6802 abbrev
= abbrev
->next
;
6807 /* Returns nonzero if TAG represents a type that we might generate a partial
6811 is_type_tag_for_partial (int tag
)
6816 /* Some types that would be reasonable to generate partial symbols for,
6817 that we don't at present. */
6818 case DW_TAG_array_type
:
6819 case DW_TAG_file_type
:
6820 case DW_TAG_ptr_to_member_type
:
6821 case DW_TAG_set_type
:
6822 case DW_TAG_string_type
:
6823 case DW_TAG_subroutine_type
:
6825 case DW_TAG_base_type
:
6826 case DW_TAG_class_type
:
6827 case DW_TAG_interface_type
:
6828 case DW_TAG_enumeration_type
:
6829 case DW_TAG_structure_type
:
6830 case DW_TAG_subrange_type
:
6831 case DW_TAG_typedef
:
6832 case DW_TAG_union_type
:
6839 /* Load all DIEs that are interesting for partial symbols into memory. */
6841 static struct partial_die_info
*
6842 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6843 int building_psymtab
, struct dwarf2_cu
*cu
)
6845 struct partial_die_info
*part_die
;
6846 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6847 struct abbrev_info
*abbrev
;
6848 unsigned int bytes_read
;
6849 unsigned int load_all
= 0;
6851 int nesting_level
= 1;
6856 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6860 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6864 &cu
->comp_unit_obstack
,
6865 hashtab_obstack_allocate
,
6866 dummy_obstack_deallocate
);
6868 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6869 sizeof (struct partial_die_info
));
6873 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6875 /* A NULL abbrev means the end of a series of children. */
6878 if (--nesting_level
== 0)
6880 /* PART_DIE was probably the last thing allocated on the
6881 comp_unit_obstack, so we could call obstack_free
6882 here. We don't do that because the waste is small,
6883 and will be cleaned up when we're done with this
6884 compilation unit. This way, we're also more robust
6885 against other users of the comp_unit_obstack. */
6888 info_ptr
+= bytes_read
;
6889 last_die
= parent_die
;
6890 parent_die
= parent_die
->die_parent
;
6894 /* Check whether this DIE is interesting enough to save. Normally
6895 we would not be interested in members here, but there may be
6896 later variables referencing them via DW_AT_specification (for
6899 && !is_type_tag_for_partial (abbrev
->tag
)
6900 && abbrev
->tag
!= DW_TAG_enumerator
6901 && abbrev
->tag
!= DW_TAG_subprogram
6902 && abbrev
->tag
!= DW_TAG_lexical_block
6903 && abbrev
->tag
!= DW_TAG_variable
6904 && abbrev
->tag
!= DW_TAG_namespace
6905 && abbrev
->tag
!= DW_TAG_module
6906 && abbrev
->tag
!= DW_TAG_member
)
6908 /* Otherwise we skip to the next sibling, if any. */
6909 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6913 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6914 buffer
, info_ptr
, cu
);
6916 /* This two-pass algorithm for processing partial symbols has a
6917 high cost in cache pressure. Thus, handle some simple cases
6918 here which cover the majority of C partial symbols. DIEs
6919 which neither have specification tags in them, nor could have
6920 specification tags elsewhere pointing at them, can simply be
6921 processed and discarded.
6923 This segment is also optional; scan_partial_symbols and
6924 add_partial_symbol will handle these DIEs if we chain
6925 them in normally. When compilers which do not emit large
6926 quantities of duplicate debug information are more common,
6927 this code can probably be removed. */
6929 /* Any complete simple types at the top level (pretty much all
6930 of them, for a language without namespaces), can be processed
6932 if (parent_die
== NULL
6933 && part_die
->has_specification
== 0
6934 && part_die
->is_declaration
== 0
6935 && (part_die
->tag
== DW_TAG_typedef
6936 || part_die
->tag
== DW_TAG_base_type
6937 || part_die
->tag
== DW_TAG_subrange_type
))
6939 if (building_psymtab
&& part_die
->name
!= NULL
)
6940 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6941 VAR_DOMAIN
, LOC_TYPEDEF
,
6942 &cu
->objfile
->static_psymbols
,
6943 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6944 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6948 /* If we're at the second level, and we're an enumerator, and
6949 our parent has no specification (meaning possibly lives in a
6950 namespace elsewhere), then we can add the partial symbol now
6951 instead of queueing it. */
6952 if (part_die
->tag
== DW_TAG_enumerator
6953 && parent_die
!= NULL
6954 && parent_die
->die_parent
== NULL
6955 && parent_die
->tag
== DW_TAG_enumeration_type
6956 && parent_die
->has_specification
== 0)
6958 if (part_die
->name
== NULL
)
6959 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6960 else if (building_psymtab
)
6961 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6962 VAR_DOMAIN
, LOC_CONST
,
6963 (cu
->language
== language_cplus
6964 || cu
->language
== language_java
)
6965 ? &cu
->objfile
->global_psymbols
6966 : &cu
->objfile
->static_psymbols
,
6967 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6969 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6973 /* We'll save this DIE so link it in. */
6974 part_die
->die_parent
= parent_die
;
6975 part_die
->die_sibling
= NULL
;
6976 part_die
->die_child
= NULL
;
6978 if (last_die
&& last_die
== parent_die
)
6979 last_die
->die_child
= part_die
;
6981 last_die
->die_sibling
= part_die
;
6983 last_die
= part_die
;
6985 if (first_die
== NULL
)
6986 first_die
= part_die
;
6988 /* Maybe add the DIE to the hash table. Not all DIEs that we
6989 find interesting need to be in the hash table, because we
6990 also have the parent/sibling/child chains; only those that we
6991 might refer to by offset later during partial symbol reading.
6993 For now this means things that might have be the target of a
6994 DW_AT_specification, DW_AT_abstract_origin, or
6995 DW_AT_extension. DW_AT_extension will refer only to
6996 namespaces; DW_AT_abstract_origin refers to functions (and
6997 many things under the function DIE, but we do not recurse
6998 into function DIEs during partial symbol reading) and
6999 possibly variables as well; DW_AT_specification refers to
7000 declarations. Declarations ought to have the DW_AT_declaration
7001 flag. It happens that GCC forgets to put it in sometimes, but
7002 only for functions, not for types.
7004 Adding more things than necessary to the hash table is harmless
7005 except for the performance cost. Adding too few will result in
7006 wasted time in find_partial_die, when we reread the compilation
7007 unit with load_all_dies set. */
7010 || abbrev
->tag
== DW_TAG_subprogram
7011 || abbrev
->tag
== DW_TAG_variable
7012 || abbrev
->tag
== DW_TAG_namespace
7013 || part_die
->is_declaration
)
7017 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
7018 part_die
->offset
, INSERT
);
7022 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
7023 sizeof (struct partial_die_info
));
7025 /* For some DIEs we want to follow their children (if any). For C
7026 we have no reason to follow the children of structures; for other
7027 languages we have to, both so that we can get at method physnames
7028 to infer fully qualified class names, and for DW_AT_specification.
7030 For Ada, we need to scan the children of subprograms and lexical
7031 blocks as well because Ada allows the definition of nested
7032 entities that could be interesting for the debugger, such as
7033 nested subprograms for instance. */
7034 if (last_die
->has_children
7036 || last_die
->tag
== DW_TAG_namespace
7037 || last_die
->tag
== DW_TAG_module
7038 || last_die
->tag
== DW_TAG_enumeration_type
7039 || (cu
->language
!= language_c
7040 && (last_die
->tag
== DW_TAG_class_type
7041 || last_die
->tag
== DW_TAG_interface_type
7042 || last_die
->tag
== DW_TAG_structure_type
7043 || last_die
->tag
== DW_TAG_union_type
))
7044 || (cu
->language
== language_ada
7045 && (last_die
->tag
== DW_TAG_subprogram
7046 || last_die
->tag
== DW_TAG_lexical_block
))))
7049 parent_die
= last_die
;
7053 /* Otherwise we skip to the next sibling, if any. */
7054 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
7056 /* Back to the top, do it again. */
7060 /* Read a minimal amount of information into the minimal die structure. */
7063 read_partial_die (struct partial_die_info
*part_die
,
7064 struct abbrev_info
*abbrev
,
7065 unsigned int abbrev_len
, bfd
*abfd
,
7066 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
7067 struct dwarf2_cu
*cu
)
7070 struct attribute attr
;
7071 int has_low_pc_attr
= 0;
7072 int has_high_pc_attr
= 0;
7074 memset (part_die
, 0, sizeof (struct partial_die_info
));
7076 part_die
->offset
= info_ptr
- buffer
;
7078 info_ptr
+= abbrev_len
;
7083 part_die
->tag
= abbrev
->tag
;
7084 part_die
->has_children
= abbrev
->has_children
;
7086 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
7088 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
7090 /* Store the data if it is of an attribute we want to keep in a
7091 partial symbol table. */
7095 switch (part_die
->tag
)
7097 case DW_TAG_compile_unit
:
7098 case DW_TAG_type_unit
:
7099 /* Compilation units have a DW_AT_name that is a filename, not
7100 a source language identifier. */
7101 case DW_TAG_enumeration_type
:
7102 case DW_TAG_enumerator
:
7103 /* These tags always have simple identifiers already; no need
7104 to canonicalize them. */
7105 part_die
->name
= DW_STRING (&attr
);
7109 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
7110 &cu
->objfile
->objfile_obstack
);
7114 case DW_AT_linkage_name
:
7115 case DW_AT_MIPS_linkage_name
:
7116 /* Note that both forms of linkage name might appear. We
7117 assume they will be the same, and we only store the last
7119 if (cu
->language
== language_ada
)
7120 part_die
->name
= DW_STRING (&attr
);
7123 has_low_pc_attr
= 1;
7124 part_die
->lowpc
= DW_ADDR (&attr
);
7127 has_high_pc_attr
= 1;
7128 part_die
->highpc
= DW_ADDR (&attr
);
7130 case DW_AT_location
:
7131 /* Support the .debug_loc offsets */
7132 if (attr_form_is_block (&attr
))
7134 part_die
->locdesc
= DW_BLOCK (&attr
);
7136 else if (attr_form_is_section_offset (&attr
))
7138 dwarf2_complex_location_expr_complaint ();
7142 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
7143 "partial symbol information");
7146 case DW_AT_external
:
7147 part_die
->is_external
= DW_UNSND (&attr
);
7149 case DW_AT_declaration
:
7150 part_die
->is_declaration
= DW_UNSND (&attr
);
7153 part_die
->has_type
= 1;
7155 case DW_AT_abstract_origin
:
7156 case DW_AT_specification
:
7157 case DW_AT_extension
:
7158 part_die
->has_specification
= 1;
7159 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
7162 /* Ignore absolute siblings, they might point outside of
7163 the current compile unit. */
7164 if (attr
.form
== DW_FORM_ref_addr
)
7165 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
7167 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
7169 case DW_AT_byte_size
:
7170 part_die
->has_byte_size
= 1;
7172 case DW_AT_calling_convention
:
7173 /* DWARF doesn't provide a way to identify a program's source-level
7174 entry point. DW_AT_calling_convention attributes are only meant
7175 to describe functions' calling conventions.
7177 However, because it's a necessary piece of information in
7178 Fortran, and because DW_CC_program is the only piece of debugging
7179 information whose definition refers to a 'main program' at all,
7180 several compilers have begun marking Fortran main programs with
7181 DW_CC_program --- even when those functions use the standard
7182 calling conventions.
7184 So until DWARF specifies a way to provide this information and
7185 compilers pick up the new representation, we'll support this
7187 if (DW_UNSND (&attr
) == DW_CC_program
7188 && cu
->language
== language_fortran
)
7189 set_main_name (part_die
->name
);
7196 /* When using the GNU linker, .gnu.linkonce. sections are used to
7197 eliminate duplicate copies of functions and vtables and such.
7198 The linker will arbitrarily choose one and discard the others.
7199 The AT_*_pc values for such functions refer to local labels in
7200 these sections. If the section from that file was discarded, the
7201 labels are not in the output, so the relocs get a value of 0.
7202 If this is a discarded function, mark the pc bounds as invalid,
7203 so that GDB will ignore it. */
7204 if (has_low_pc_attr
&& has_high_pc_attr
7205 && part_die
->lowpc
< part_die
->highpc
7206 && (part_die
->lowpc
!= 0
7207 || dwarf2_per_objfile
->has_section_at_zero
))
7208 part_die
->has_pc_info
= 1;
7213 /* Find a cached partial DIE at OFFSET in CU. */
7215 static struct partial_die_info
*
7216 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
7218 struct partial_die_info
*lookup_die
= NULL
;
7219 struct partial_die_info part_die
;
7221 part_die
.offset
= offset
;
7222 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
7227 /* Find a partial DIE at OFFSET, which may or may not be in CU,
7228 except in the case of .debug_types DIEs which do not reference
7229 outside their CU (they do however referencing other types via
7232 static struct partial_die_info
*
7233 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
7235 struct dwarf2_per_cu_data
*per_cu
= NULL
;
7236 struct partial_die_info
*pd
= NULL
;
7238 if (cu
->per_cu
->from_debug_types
)
7240 pd
= find_partial_die_in_comp_unit (offset
, cu
);
7246 if (offset_in_cu_p (&cu
->header
, offset
))
7248 pd
= find_partial_die_in_comp_unit (offset
, cu
);
7253 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
7255 if (per_cu
->cu
== NULL
)
7257 load_partial_comp_unit (per_cu
, cu
->objfile
);
7258 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7259 dwarf2_per_objfile
->read_in_chain
= per_cu
;
7262 per_cu
->cu
->last_used
= 0;
7263 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7265 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
7267 struct cleanup
*back_to
;
7268 struct partial_die_info comp_unit_die
;
7269 struct abbrev_info
*abbrev
;
7270 unsigned int bytes_read
;
7273 per_cu
->load_all_dies
= 1;
7275 /* Re-read the DIEs. */
7276 back_to
= make_cleanup (null_cleanup
, 0);
7277 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
7279 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
7280 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
7282 info_ptr
= (dwarf2_per_objfile
->info
.buffer
7283 + per_cu
->cu
->header
.offset
7284 + per_cu
->cu
->header
.first_die_offset
);
7285 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
7286 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
7287 per_cu
->cu
->objfile
->obfd
,
7288 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7290 if (comp_unit_die
.has_children
)
7291 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
7292 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7294 do_cleanups (back_to
);
7296 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7302 internal_error (__FILE__
, __LINE__
,
7303 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
7304 offset
, bfd_get_filename (cu
->objfile
->obfd
));
7308 /* Adjust PART_DIE before generating a symbol for it. This function
7309 may set the is_external flag or change the DIE's name. */
7312 fixup_partial_die (struct partial_die_info
*part_die
,
7313 struct dwarf2_cu
*cu
)
7315 /* If we found a reference attribute and the DIE has no name, try
7316 to find a name in the referred to DIE. */
7318 if (part_die
->name
== NULL
&& part_die
->has_specification
)
7320 struct partial_die_info
*spec_die
;
7322 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
7324 fixup_partial_die (spec_die
, cu
);
7328 part_die
->name
= spec_die
->name
;
7330 /* Copy DW_AT_external attribute if it is set. */
7331 if (spec_die
->is_external
)
7332 part_die
->is_external
= spec_die
->is_external
;
7336 /* Set default names for some unnamed DIEs. */
7337 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
7338 || part_die
->tag
== DW_TAG_class_type
))
7339 part_die
->name
= "(anonymous class)";
7341 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
7342 part_die
->name
= "(anonymous namespace)";
7344 if (part_die
->tag
== DW_TAG_structure_type
7345 || part_die
->tag
== DW_TAG_class_type
7346 || part_die
->tag
== DW_TAG_union_type
)
7347 guess_structure_name (part_die
, cu
);
7350 /* Read an attribute value described by an attribute form. */
7353 read_attribute_value (struct attribute
*attr
, unsigned form
,
7354 bfd
*abfd
, gdb_byte
*info_ptr
,
7355 struct dwarf2_cu
*cu
)
7357 struct comp_unit_head
*cu_header
= &cu
->header
;
7358 unsigned int bytes_read
;
7359 struct dwarf_block
*blk
;
7364 case DW_FORM_ref_addr
:
7365 if (cu
->header
.version
== 2)
7366 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7368 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7369 info_ptr
+= bytes_read
;
7372 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7373 info_ptr
+= bytes_read
;
7375 case DW_FORM_block2
:
7376 blk
= dwarf_alloc_block (cu
);
7377 blk
->size
= read_2_bytes (abfd
, info_ptr
);
7379 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7380 info_ptr
+= blk
->size
;
7381 DW_BLOCK (attr
) = blk
;
7383 case DW_FORM_block4
:
7384 blk
= dwarf_alloc_block (cu
);
7385 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7387 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7388 info_ptr
+= blk
->size
;
7389 DW_BLOCK (attr
) = blk
;
7392 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7396 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7400 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7403 case DW_FORM_sec_offset
:
7404 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7405 info_ptr
+= bytes_read
;
7407 case DW_FORM_string
:
7408 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7409 DW_STRING_IS_CANONICAL (attr
) = 0;
7410 info_ptr
+= bytes_read
;
7413 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7415 DW_STRING_IS_CANONICAL (attr
) = 0;
7416 info_ptr
+= bytes_read
;
7418 case DW_FORM_exprloc
:
7420 blk
= dwarf_alloc_block (cu
);
7421 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7422 info_ptr
+= bytes_read
;
7423 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7424 info_ptr
+= blk
->size
;
7425 DW_BLOCK (attr
) = blk
;
7427 case DW_FORM_block1
:
7428 blk
= dwarf_alloc_block (cu
);
7429 blk
->size
= read_1_byte (abfd
, info_ptr
);
7431 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7432 info_ptr
+= blk
->size
;
7433 DW_BLOCK (attr
) = blk
;
7436 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7440 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7443 case DW_FORM_flag_present
:
7444 DW_UNSND (attr
) = 1;
7447 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7448 info_ptr
+= bytes_read
;
7451 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7452 info_ptr
+= bytes_read
;
7455 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7459 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7463 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7467 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7471 /* Convert the signature to something we can record in DW_UNSND
7473 NOTE: This is NULL if the type wasn't found. */
7474 DW_SIGNATURED_TYPE (attr
) =
7475 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7478 case DW_FORM_ref_udata
:
7479 DW_ADDR (attr
) = (cu
->header
.offset
7480 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7481 info_ptr
+= bytes_read
;
7483 case DW_FORM_indirect
:
7484 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7485 info_ptr
+= bytes_read
;
7486 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7489 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7490 dwarf_form_name (form
),
7491 bfd_get_filename (abfd
));
7494 /* We have seen instances where the compiler tried to emit a byte
7495 size attribute of -1 which ended up being encoded as an unsigned
7496 0xffffffff. Although 0xffffffff is technically a valid size value,
7497 an object of this size seems pretty unlikely so we can relatively
7498 safely treat these cases as if the size attribute was invalid and
7499 treat them as zero by default. */
7500 if (attr
->name
== DW_AT_byte_size
7501 && form
== DW_FORM_data4
7502 && DW_UNSND (attr
) >= 0xffffffff)
7505 (&symfile_complaints
,
7506 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7507 hex_string (DW_UNSND (attr
)));
7508 DW_UNSND (attr
) = 0;
7514 /* Read an attribute described by an abbreviated attribute. */
7517 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7518 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7520 attr
->name
= abbrev
->name
;
7521 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7524 /* read dwarf information from a buffer */
7527 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7529 return bfd_get_8 (abfd
, buf
);
7533 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7535 return bfd_get_signed_8 (abfd
, buf
);
7539 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7541 return bfd_get_16 (abfd
, buf
);
7545 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7547 return bfd_get_signed_16 (abfd
, buf
);
7551 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7553 return bfd_get_32 (abfd
, buf
);
7557 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7559 return bfd_get_signed_32 (abfd
, buf
);
7563 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7565 return bfd_get_64 (abfd
, buf
);
7569 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7570 unsigned int *bytes_read
)
7572 struct comp_unit_head
*cu_header
= &cu
->header
;
7573 CORE_ADDR retval
= 0;
7575 if (cu_header
->signed_addr_p
)
7577 switch (cu_header
->addr_size
)
7580 retval
= bfd_get_signed_16 (abfd
, buf
);
7583 retval
= bfd_get_signed_32 (abfd
, buf
);
7586 retval
= bfd_get_signed_64 (abfd
, buf
);
7589 internal_error (__FILE__
, __LINE__
,
7590 _("read_address: bad switch, signed [in module %s]"),
7591 bfd_get_filename (abfd
));
7596 switch (cu_header
->addr_size
)
7599 retval
= bfd_get_16 (abfd
, buf
);
7602 retval
= bfd_get_32 (abfd
, buf
);
7605 retval
= bfd_get_64 (abfd
, buf
);
7608 internal_error (__FILE__
, __LINE__
,
7609 _("read_address: bad switch, unsigned [in module %s]"),
7610 bfd_get_filename (abfd
));
7614 *bytes_read
= cu_header
->addr_size
;
7618 /* Read the initial length from a section. The (draft) DWARF 3
7619 specification allows the initial length to take up either 4 bytes
7620 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7621 bytes describe the length and all offsets will be 8 bytes in length
7624 An older, non-standard 64-bit format is also handled by this
7625 function. The older format in question stores the initial length
7626 as an 8-byte quantity without an escape value. Lengths greater
7627 than 2^32 aren't very common which means that the initial 4 bytes
7628 is almost always zero. Since a length value of zero doesn't make
7629 sense for the 32-bit format, this initial zero can be considered to
7630 be an escape value which indicates the presence of the older 64-bit
7631 format. As written, the code can't detect (old format) lengths
7632 greater than 4GB. If it becomes necessary to handle lengths
7633 somewhat larger than 4GB, we could allow other small values (such
7634 as the non-sensical values of 1, 2, and 3) to also be used as
7635 escape values indicating the presence of the old format.
7637 The value returned via bytes_read should be used to increment the
7638 relevant pointer after calling read_initial_length().
7640 [ Note: read_initial_length() and read_offset() are based on the
7641 document entitled "DWARF Debugging Information Format", revision
7642 3, draft 8, dated November 19, 2001. This document was obtained
7645 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7647 This document is only a draft and is subject to change. (So beware.)
7649 Details regarding the older, non-standard 64-bit format were
7650 determined empirically by examining 64-bit ELF files produced by
7651 the SGI toolchain on an IRIX 6.5 machine.
7653 - Kevin, July 16, 2002
7657 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7659 LONGEST length
= bfd_get_32 (abfd
, buf
);
7661 if (length
== 0xffffffff)
7663 length
= bfd_get_64 (abfd
, buf
+ 4);
7666 else if (length
== 0)
7668 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7669 length
= bfd_get_64 (abfd
, buf
);
7680 /* Cover function for read_initial_length.
7681 Returns the length of the object at BUF, and stores the size of the
7682 initial length in *BYTES_READ and stores the size that offsets will be in
7684 If the initial length size is not equivalent to that specified in
7685 CU_HEADER then issue a complaint.
7686 This is useful when reading non-comp-unit headers. */
7689 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7690 const struct comp_unit_head
*cu_header
,
7691 unsigned int *bytes_read
,
7692 unsigned int *offset_size
)
7694 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7696 gdb_assert (cu_header
->initial_length_size
== 4
7697 || cu_header
->initial_length_size
== 8
7698 || cu_header
->initial_length_size
== 12);
7700 if (cu_header
->initial_length_size
!= *bytes_read
)
7701 complaint (&symfile_complaints
,
7702 _("intermixed 32-bit and 64-bit DWARF sections"));
7704 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7708 /* Read an offset from the data stream. The size of the offset is
7709 given by cu_header->offset_size. */
7712 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7713 unsigned int *bytes_read
)
7715 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7717 *bytes_read
= cu_header
->offset_size
;
7721 /* Read an offset from the data stream. */
7724 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7728 switch (offset_size
)
7731 retval
= bfd_get_32 (abfd
, buf
);
7734 retval
= bfd_get_64 (abfd
, buf
);
7737 internal_error (__FILE__
, __LINE__
,
7738 _("read_offset_1: bad switch [in module %s]"),
7739 bfd_get_filename (abfd
));
7746 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7748 /* If the size of a host char is 8 bits, we can return a pointer
7749 to the buffer, otherwise we have to copy the data to a buffer
7750 allocated on the temporary obstack. */
7751 gdb_assert (HOST_CHAR_BIT
== 8);
7756 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7758 /* If the size of a host char is 8 bits, we can return a pointer
7759 to the string, otherwise we have to copy the string to a buffer
7760 allocated on the temporary obstack. */
7761 gdb_assert (HOST_CHAR_BIT
== 8);
7764 *bytes_read_ptr
= 1;
7767 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7768 return (char *) buf
;
7772 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7773 const struct comp_unit_head
*cu_header
,
7774 unsigned int *bytes_read_ptr
)
7776 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7778 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
7779 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7781 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7782 bfd_get_filename (abfd
));
7785 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7787 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7788 bfd_get_filename (abfd
));
7791 gdb_assert (HOST_CHAR_BIT
== 8);
7792 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7794 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7797 static unsigned long
7798 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7800 unsigned long result
;
7801 unsigned int num_read
;
7811 byte
= bfd_get_8 (abfd
, buf
);
7814 result
|= ((unsigned long)(byte
& 127) << shift
);
7815 if ((byte
& 128) == 0)
7821 *bytes_read_ptr
= num_read
;
7826 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7829 int i
, shift
, num_read
;
7838 byte
= bfd_get_8 (abfd
, buf
);
7841 result
|= ((long)(byte
& 127) << shift
);
7843 if ((byte
& 128) == 0)
7848 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7849 result
|= -(((long)1) << shift
);
7850 *bytes_read_ptr
= num_read
;
7854 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7857 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7863 byte
= bfd_get_8 (abfd
, buf
);
7865 if ((byte
& 128) == 0)
7871 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7878 cu
->language
= language_c
;
7880 case DW_LANG_C_plus_plus
:
7881 cu
->language
= language_cplus
;
7884 cu
->language
= language_d
;
7886 case DW_LANG_Fortran77
:
7887 case DW_LANG_Fortran90
:
7888 case DW_LANG_Fortran95
:
7889 cu
->language
= language_fortran
;
7891 case DW_LANG_Mips_Assembler
:
7892 cu
->language
= language_asm
;
7895 cu
->language
= language_java
;
7899 cu
->language
= language_ada
;
7901 case DW_LANG_Modula2
:
7902 cu
->language
= language_m2
;
7904 case DW_LANG_Pascal83
:
7905 cu
->language
= language_pascal
;
7908 cu
->language
= language_objc
;
7910 case DW_LANG_Cobol74
:
7911 case DW_LANG_Cobol85
:
7913 cu
->language
= language_minimal
;
7916 cu
->language_defn
= language_def (cu
->language
);
7919 /* Return the named attribute or NULL if not there. */
7921 static struct attribute
*
7922 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7925 struct attribute
*spec
= NULL
;
7927 for (i
= 0; i
< die
->num_attrs
; ++i
)
7929 if (die
->attrs
[i
].name
== name
)
7930 return &die
->attrs
[i
];
7931 if (die
->attrs
[i
].name
== DW_AT_specification
7932 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7933 spec
= &die
->attrs
[i
];
7938 die
= follow_die_ref (die
, spec
, &cu
);
7939 return dwarf2_attr (die
, name
, cu
);
7945 /* Return the named attribute or NULL if not there,
7946 but do not follow DW_AT_specification, etc.
7947 This is for use in contexts where we're reading .debug_types dies.
7948 Following DW_AT_specification, DW_AT_abstract_origin will take us
7949 back up the chain, and we want to go down. */
7951 static struct attribute
*
7952 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7953 struct dwarf2_cu
*cu
)
7957 for (i
= 0; i
< die
->num_attrs
; ++i
)
7958 if (die
->attrs
[i
].name
== name
)
7959 return &die
->attrs
[i
];
7964 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7965 and holds a non-zero value. This function should only be used for
7966 DW_FORM_flag or DW_FORM_flag_present attributes. */
7969 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7971 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7973 return (attr
&& DW_UNSND (attr
));
7977 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7979 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7980 which value is non-zero. However, we have to be careful with
7981 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7982 (via dwarf2_flag_true_p) follows this attribute. So we may
7983 end up accidently finding a declaration attribute that belongs
7984 to a different DIE referenced by the specification attribute,
7985 even though the given DIE does not have a declaration attribute. */
7986 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7987 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7990 /* Return the die giving the specification for DIE, if there is
7991 one. *SPEC_CU is the CU containing DIE on input, and the CU
7992 containing the return value on output. If there is no
7993 specification, but there is an abstract origin, that is
7996 static struct die_info
*
7997 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7999 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
8002 if (spec_attr
== NULL
)
8003 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
8005 if (spec_attr
== NULL
)
8008 return follow_die_ref (die
, spec_attr
, spec_cu
);
8011 /* Free the line_header structure *LH, and any arrays and strings it
8014 free_line_header (struct line_header
*lh
)
8016 if (lh
->standard_opcode_lengths
)
8017 xfree (lh
->standard_opcode_lengths
);
8019 /* Remember that all the lh->file_names[i].name pointers are
8020 pointers into debug_line_buffer, and don't need to be freed. */
8022 xfree (lh
->file_names
);
8024 /* Similarly for the include directory names. */
8025 if (lh
->include_dirs
)
8026 xfree (lh
->include_dirs
);
8032 /* Add an entry to LH's include directory table. */
8034 add_include_dir (struct line_header
*lh
, char *include_dir
)
8036 /* Grow the array if necessary. */
8037 if (lh
->include_dirs_size
== 0)
8039 lh
->include_dirs_size
= 1; /* for testing */
8040 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
8041 * sizeof (*lh
->include_dirs
));
8043 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
8045 lh
->include_dirs_size
*= 2;
8046 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
8047 (lh
->include_dirs_size
8048 * sizeof (*lh
->include_dirs
)));
8051 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
8055 /* Add an entry to LH's file name table. */
8057 add_file_name (struct line_header
*lh
,
8059 unsigned int dir_index
,
8060 unsigned int mod_time
,
8061 unsigned int length
)
8063 struct file_entry
*fe
;
8065 /* Grow the array if necessary. */
8066 if (lh
->file_names_size
== 0)
8068 lh
->file_names_size
= 1; /* for testing */
8069 lh
->file_names
= xmalloc (lh
->file_names_size
8070 * sizeof (*lh
->file_names
));
8072 else if (lh
->num_file_names
>= lh
->file_names_size
)
8074 lh
->file_names_size
*= 2;
8075 lh
->file_names
= xrealloc (lh
->file_names
,
8076 (lh
->file_names_size
8077 * sizeof (*lh
->file_names
)));
8080 fe
= &lh
->file_names
[lh
->num_file_names
++];
8082 fe
->dir_index
= dir_index
;
8083 fe
->mod_time
= mod_time
;
8084 fe
->length
= length
;
8090 /* Read the statement program header starting at OFFSET in
8091 .debug_line, according to the endianness of ABFD. Return a pointer
8092 to a struct line_header, allocated using xmalloc.
8094 NOTE: the strings in the include directory and file name tables of
8095 the returned object point into debug_line_buffer, and must not be
8097 static struct line_header
*
8098 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
8099 struct dwarf2_cu
*cu
)
8101 struct cleanup
*back_to
;
8102 struct line_header
*lh
;
8104 unsigned int bytes_read
, offset_size
;
8106 char *cur_dir
, *cur_file
;
8108 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
8109 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
8111 complaint (&symfile_complaints
, _("missing .debug_line section"));
8115 /* Make sure that at least there's room for the total_length field.
8116 That could be 12 bytes long, but we're just going to fudge that. */
8117 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
8119 dwarf2_statement_list_fits_in_line_number_section_complaint ();
8123 lh
= xmalloc (sizeof (*lh
));
8124 memset (lh
, 0, sizeof (*lh
));
8125 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
8128 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
8130 /* Read in the header. */
8132 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
8133 &bytes_read
, &offset_size
);
8134 line_ptr
+= bytes_read
;
8135 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
8136 + dwarf2_per_objfile
->line
.size
))
8138 dwarf2_statement_list_fits_in_line_number_section_complaint ();
8141 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
8142 lh
->version
= read_2_bytes (abfd
, line_ptr
);
8144 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
8145 line_ptr
+= offset_size
;
8146 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
8148 if (lh
->version
>= 4)
8150 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
8154 lh
->maximum_ops_per_instruction
= 1;
8156 if (lh
->maximum_ops_per_instruction
== 0)
8158 lh
->maximum_ops_per_instruction
= 1;
8159 complaint (&symfile_complaints
,
8160 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
8163 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
8165 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
8167 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
8169 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
8171 lh
->standard_opcode_lengths
8172 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
8174 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
8175 for (i
= 1; i
< lh
->opcode_base
; ++i
)
8177 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
8181 /* Read directory table. */
8182 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
8184 line_ptr
+= bytes_read
;
8185 add_include_dir (lh
, cur_dir
);
8187 line_ptr
+= bytes_read
;
8189 /* Read file name table. */
8190 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
8192 unsigned int dir_index
, mod_time
, length
;
8194 line_ptr
+= bytes_read
;
8195 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8196 line_ptr
+= bytes_read
;
8197 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8198 line_ptr
+= bytes_read
;
8199 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8200 line_ptr
+= bytes_read
;
8202 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8204 line_ptr
+= bytes_read
;
8205 lh
->statement_program_start
= line_ptr
;
8207 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
8208 + dwarf2_per_objfile
->line
.size
))
8209 complaint (&symfile_complaints
,
8210 _("line number info header doesn't fit in `.debug_line' section"));
8212 discard_cleanups (back_to
);
8216 /* This function exists to work around a bug in certain compilers
8217 (particularly GCC 2.95), in which the first line number marker of a
8218 function does not show up until after the prologue, right before
8219 the second line number marker. This function shifts ADDRESS down
8220 to the beginning of the function if necessary, and is called on
8221 addresses passed to record_line. */
8224 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
8226 struct function_range
*fn
;
8228 /* Find the function_range containing address. */
8233 cu
->cached_fn
= cu
->first_fn
;
8237 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
8243 while (fn
&& fn
!= cu
->cached_fn
)
8244 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
8254 if (address
!= fn
->lowpc
)
8255 complaint (&symfile_complaints
,
8256 _("misplaced first line number at 0x%lx for '%s'"),
8257 (unsigned long) address
, fn
->name
);
8262 /* Decode the Line Number Program (LNP) for the given line_header
8263 structure and CU. The actual information extracted and the type
8264 of structures created from the LNP depends on the value of PST.
8266 1. If PST is NULL, then this procedure uses the data from the program
8267 to create all necessary symbol tables, and their linetables.
8268 The compilation directory of the file is passed in COMP_DIR,
8269 and must not be NULL.
8271 2. If PST is not NULL, this procedure reads the program to determine
8272 the list of files included by the unit represented by PST, and
8273 builds all the associated partial symbol tables. In this case,
8274 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
8275 is not used to compute the full name of the symtab, and therefore
8276 omitting it when building the partial symtab does not introduce
8277 the potential for inconsistency - a partial symtab and its associated
8278 symbtab having a different fullname -). */
8281 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
8282 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
8284 gdb_byte
*line_ptr
, *extended_end
;
8286 unsigned int bytes_read
, extended_len
;
8287 unsigned char op_code
, extended_op
, adj_opcode
;
8289 struct objfile
*objfile
= cu
->objfile
;
8290 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8291 const int decode_for_pst_p
= (pst
!= NULL
);
8292 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
8294 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8296 line_ptr
= lh
->statement_program_start
;
8297 line_end
= lh
->statement_program_end
;
8299 /* Read the statement sequences until there's nothing left. */
8300 while (line_ptr
< line_end
)
8302 /* state machine registers */
8303 CORE_ADDR address
= 0;
8304 unsigned int file
= 1;
8305 unsigned int line
= 1;
8306 unsigned int column
= 0;
8307 int is_stmt
= lh
->default_is_stmt
;
8308 int basic_block
= 0;
8309 int end_sequence
= 0;
8311 unsigned char op_index
= 0;
8313 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
8315 /* Start a subfile for the current file of the state machine. */
8316 /* lh->include_dirs and lh->file_names are 0-based, but the
8317 directory and file name numbers in the statement program
8319 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
8323 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8325 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8328 /* Decode the table. */
8329 while (!end_sequence
)
8331 op_code
= read_1_byte (abfd
, line_ptr
);
8333 if (line_ptr
> line_end
)
8335 dwarf2_debug_line_missing_end_sequence_complaint ();
8339 if (op_code
>= lh
->opcode_base
)
8341 /* Special operand. */
8342 adj_opcode
= op_code
- lh
->opcode_base
;
8343 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
8344 / lh
->maximum_ops_per_instruction
)
8345 * lh
->minimum_instruction_length
);
8346 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
8347 % lh
->maximum_ops_per_instruction
);
8348 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
8349 if (lh
->num_file_names
< file
|| file
== 0)
8350 dwarf2_debug_line_missing_file_complaint ();
8351 /* For now we ignore lines not starting on an
8352 instruction boundary. */
8353 else if (op_index
== 0)
8355 lh
->file_names
[file
- 1].included_p
= 1;
8356 if (!decode_for_pst_p
&& is_stmt
)
8358 if (last_subfile
!= current_subfile
)
8360 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8362 record_line (last_subfile
, 0, addr
);
8363 last_subfile
= current_subfile
;
8365 /* Append row to matrix using current values. */
8366 addr
= check_cu_functions (address
, cu
);
8367 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8368 record_line (current_subfile
, line
, addr
);
8373 else switch (op_code
)
8375 case DW_LNS_extended_op
:
8376 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8377 line_ptr
+= bytes_read
;
8378 extended_end
= line_ptr
+ extended_len
;
8379 extended_op
= read_1_byte (abfd
, line_ptr
);
8381 switch (extended_op
)
8383 case DW_LNE_end_sequence
:
8386 case DW_LNE_set_address
:
8387 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
8389 line_ptr
+= bytes_read
;
8390 address
+= baseaddr
;
8392 case DW_LNE_define_file
:
8395 unsigned int dir_index
, mod_time
, length
;
8397 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
8398 line_ptr
+= bytes_read
;
8400 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8401 line_ptr
+= bytes_read
;
8403 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8404 line_ptr
+= bytes_read
;
8406 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8407 line_ptr
+= bytes_read
;
8408 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8411 case DW_LNE_set_discriminator
:
8412 /* The discriminator is not interesting to the debugger;
8414 line_ptr
= extended_end
;
8417 complaint (&symfile_complaints
,
8418 _("mangled .debug_line section"));
8421 /* Make sure that we parsed the extended op correctly. If e.g.
8422 we expected a different address size than the producer used,
8423 we may have read the wrong number of bytes. */
8424 if (line_ptr
!= extended_end
)
8426 complaint (&symfile_complaints
,
8427 _("mangled .debug_line section"));
8432 if (lh
->num_file_names
< file
|| file
== 0)
8433 dwarf2_debug_line_missing_file_complaint ();
8436 lh
->file_names
[file
- 1].included_p
= 1;
8437 if (!decode_for_pst_p
&& is_stmt
)
8439 if (last_subfile
!= current_subfile
)
8441 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8443 record_line (last_subfile
, 0, addr
);
8444 last_subfile
= current_subfile
;
8446 addr
= check_cu_functions (address
, cu
);
8447 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8448 record_line (current_subfile
, line
, addr
);
8453 case DW_LNS_advance_pc
:
8456 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8458 address
+= (((op_index
+ adjust
)
8459 / lh
->maximum_ops_per_instruction
)
8460 * lh
->minimum_instruction_length
);
8461 op_index
= ((op_index
+ adjust
)
8462 % lh
->maximum_ops_per_instruction
);
8463 line_ptr
+= bytes_read
;
8466 case DW_LNS_advance_line
:
8467 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8468 line_ptr
+= bytes_read
;
8470 case DW_LNS_set_file
:
8472 /* The arrays lh->include_dirs and lh->file_names are
8473 0-based, but the directory and file name numbers in
8474 the statement program are 1-based. */
8475 struct file_entry
*fe
;
8478 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8479 line_ptr
+= bytes_read
;
8480 if (lh
->num_file_names
< file
|| file
== 0)
8481 dwarf2_debug_line_missing_file_complaint ();
8484 fe
= &lh
->file_names
[file
- 1];
8486 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8487 if (!decode_for_pst_p
)
8489 last_subfile
= current_subfile
;
8490 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8495 case DW_LNS_set_column
:
8496 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8497 line_ptr
+= bytes_read
;
8499 case DW_LNS_negate_stmt
:
8500 is_stmt
= (!is_stmt
);
8502 case DW_LNS_set_basic_block
:
8505 /* Add to the address register of the state machine the
8506 address increment value corresponding to special opcode
8507 255. I.e., this value is scaled by the minimum
8508 instruction length since special opcode 255 would have
8509 scaled the the increment. */
8510 case DW_LNS_const_add_pc
:
8512 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
8514 address
+= (((op_index
+ adjust
)
8515 / lh
->maximum_ops_per_instruction
)
8516 * lh
->minimum_instruction_length
);
8517 op_index
= ((op_index
+ adjust
)
8518 % lh
->maximum_ops_per_instruction
);
8521 case DW_LNS_fixed_advance_pc
:
8522 address
+= read_2_bytes (abfd
, line_ptr
);
8528 /* Unknown standard opcode, ignore it. */
8531 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8533 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8534 line_ptr
+= bytes_read
;
8539 if (lh
->num_file_names
< file
|| file
== 0)
8540 dwarf2_debug_line_missing_file_complaint ();
8543 lh
->file_names
[file
- 1].included_p
= 1;
8544 if (!decode_for_pst_p
)
8546 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8547 record_line (current_subfile
, 0, addr
);
8552 if (decode_for_pst_p
)
8556 /* Now that we're done scanning the Line Header Program, we can
8557 create the psymtab of each included file. */
8558 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8559 if (lh
->file_names
[file_index
].included_p
== 1)
8561 const struct file_entry fe
= lh
->file_names
[file_index
];
8562 char *include_name
= fe
.name
;
8563 char *dir_name
= NULL
;
8564 char *pst_filename
= pst
->filename
;
8567 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8569 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8571 include_name
= concat (dir_name
, SLASH_STRING
,
8572 include_name
, (char *)NULL
);
8573 make_cleanup (xfree
, include_name
);
8576 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8578 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8579 pst_filename
, (char *)NULL
);
8580 make_cleanup (xfree
, pst_filename
);
8583 if (strcmp (include_name
, pst_filename
) != 0)
8584 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8589 /* Make sure a symtab is created for every file, even files
8590 which contain only variables (i.e. no code with associated
8594 struct file_entry
*fe
;
8596 for (i
= 0; i
< lh
->num_file_names
; i
++)
8600 fe
= &lh
->file_names
[i
];
8602 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8603 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8605 /* Skip the main file; we don't need it, and it must be
8606 allocated last, so that it will show up before the
8607 non-primary symtabs in the objfile's symtab list. */
8608 if (current_subfile
== first_subfile
)
8611 if (current_subfile
->symtab
== NULL
)
8612 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8614 fe
->symtab
= current_subfile
->symtab
;
8619 /* Start a subfile for DWARF. FILENAME is the name of the file and
8620 DIRNAME the name of the source directory which contains FILENAME
8621 or NULL if not known. COMP_DIR is the compilation directory for the
8622 linetable's compilation unit or NULL if not known.
8623 This routine tries to keep line numbers from identical absolute and
8624 relative file names in a common subfile.
8626 Using the `list' example from the GDB testsuite, which resides in
8627 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8628 of /srcdir/list0.c yields the following debugging information for list0.c:
8630 DW_AT_name: /srcdir/list0.c
8631 DW_AT_comp_dir: /compdir
8632 files.files[0].name: list0.h
8633 files.files[0].dir: /srcdir
8634 files.files[1].name: list0.c
8635 files.files[1].dir: /srcdir
8637 The line number information for list0.c has to end up in a single
8638 subfile, so that `break /srcdir/list0.c:1' works as expected.
8639 start_subfile will ensure that this happens provided that we pass the
8640 concatenation of files.files[1].dir and files.files[1].name as the
8644 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8648 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8649 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8650 second argument to start_subfile. To be consistent, we do the
8651 same here. In order not to lose the line information directory,
8652 we concatenate it to the filename when it makes sense.
8653 Note that the Dwarf3 standard says (speaking of filenames in line
8654 information): ``The directory index is ignored for file names
8655 that represent full path names''. Thus ignoring dirname in the
8656 `else' branch below isn't an issue. */
8658 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8659 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8661 fullname
= filename
;
8663 start_subfile (fullname
, comp_dir
);
8665 if (fullname
!= filename
)
8670 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8671 struct dwarf2_cu
*cu
)
8673 struct objfile
*objfile
= cu
->objfile
;
8674 struct comp_unit_head
*cu_header
= &cu
->header
;
8676 /* NOTE drow/2003-01-30: There used to be a comment and some special
8677 code here to turn a symbol with DW_AT_external and a
8678 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8679 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8680 with some versions of binutils) where shared libraries could have
8681 relocations against symbols in their debug information - the
8682 minimal symbol would have the right address, but the debug info
8683 would not. It's no longer necessary, because we will explicitly
8684 apply relocations when we read in the debug information now. */
8686 /* A DW_AT_location attribute with no contents indicates that a
8687 variable has been optimized away. */
8688 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8690 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8694 /* Handle one degenerate form of location expression specially, to
8695 preserve GDB's previous behavior when section offsets are
8696 specified. If this is just a DW_OP_addr then mark this symbol
8699 if (attr_form_is_block (attr
)
8700 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8701 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8705 SYMBOL_VALUE_ADDRESS (sym
) =
8706 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8707 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8708 fixup_symbol_section (sym
, objfile
);
8709 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8710 SYMBOL_SECTION (sym
));
8714 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8715 expression evaluator, and use LOC_COMPUTED only when necessary
8716 (i.e. when the value of a register or memory location is
8717 referenced, or a thread-local block, etc.). Then again, it might
8718 not be worthwhile. I'm assuming that it isn't unless performance
8719 or memory numbers show me otherwise. */
8721 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8722 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8725 /* Given a pointer to a DWARF information entry, figure out if we need
8726 to make a symbol table entry for it, and if so, create a new entry
8727 and return a pointer to it.
8728 If TYPE is NULL, determine symbol type from the die, otherwise
8729 used the passed type. */
8731 static struct symbol
*
8732 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8734 struct objfile
*objfile
= cu
->objfile
;
8735 struct symbol
*sym
= NULL
;
8737 struct attribute
*attr
= NULL
;
8738 struct attribute
*attr2
= NULL
;
8740 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8742 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8744 name
= dwarf2_name (die
, cu
);
8747 const char *linkagename
;
8749 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8750 sizeof (struct symbol
));
8751 OBJSTAT (objfile
, n_syms
++);
8752 memset (sym
, 0, sizeof (struct symbol
));
8754 /* Cache this symbol's name and the name's demangled form (if any). */
8755 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8756 linkagename
= dwarf2_physname (name
, die
, cu
);
8757 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
8759 /* Fortran does not have mangling standard and the mangling does differ
8760 between gfortran, iFort etc. */
8761 if (cu
->language
== language_fortran
8762 && sym
->ginfo
.language_specific
.cplus_specific
.demangled_name
== NULL
)
8763 sym
->ginfo
.language_specific
.cplus_specific
.demangled_name
8764 = (char *) dwarf2_full_name (name
, die
, cu
);
8766 /* Default assumptions.
8767 Use the passed type or decode it from the die. */
8768 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8769 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8771 SYMBOL_TYPE (sym
) = type
;
8773 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8774 attr
= dwarf2_attr (die
,
8775 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8779 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8782 attr
= dwarf2_attr (die
,
8783 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8787 int file_index
= DW_UNSND (attr
);
8789 if (cu
->line_header
== NULL
8790 || file_index
> cu
->line_header
->num_file_names
)
8791 complaint (&symfile_complaints
,
8792 _("file index out of range"));
8793 else if (file_index
> 0)
8795 struct file_entry
*fe
;
8797 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8798 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8805 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8808 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8810 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8812 case DW_TAG_subprogram
:
8813 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8815 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8816 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8817 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8818 || cu
->language
== language_ada
)
8820 /* Subprograms marked external are stored as a global symbol.
8821 Ada subprograms, whether marked external or not, are always
8822 stored as a global symbol, because we want to be able to
8823 access them globally. For instance, we want to be able
8824 to break on a nested subprogram without having to
8825 specify the context. */
8826 add_symbol_to_list (sym
, &global_symbols
);
8830 add_symbol_to_list (sym
, cu
->list_in_scope
);
8833 case DW_TAG_inlined_subroutine
:
8834 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8836 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8837 SYMBOL_INLINED (sym
) = 1;
8838 /* Do not add the symbol to any lists. It will be found via
8839 BLOCK_FUNCTION from the blockvector. */
8841 case DW_TAG_variable
:
8843 /* Compilation with minimal debug info may result in variables
8844 with missing type entries. Change the misleading `void' type
8845 to something sensible. */
8846 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8848 = objfile_type (objfile
)->nodebug_data_symbol
;
8850 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8851 /* In the case of DW_TAG_member, we should only be called for
8852 static const members. */
8853 if (die
->tag
== DW_TAG_member
)
8855 /* dwarf2_add_field uses die_is_declaration,
8856 so we do the same. */
8857 gdb_assert (die_is_declaration (die
, cu
));
8862 dwarf2_const_value (attr
, sym
, cu
);
8863 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8864 if (attr2
&& (DW_UNSND (attr2
) != 0))
8865 add_symbol_to_list (sym
, &global_symbols
);
8867 add_symbol_to_list (sym
, cu
->list_in_scope
);
8870 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8873 var_decode_location (attr
, sym
, cu
);
8874 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8875 if (attr2
&& (DW_UNSND (attr2
) != 0))
8877 struct pending
**list_to_add
;
8879 /* Workaround gfortran PR debug/40040 - it uses
8880 DW_AT_location for variables in -fPIC libraries which may
8881 get overriden by other libraries/executable and get
8882 a different address. Resolve it by the minimal symbol
8883 which may come from inferior's executable using copy
8884 relocation. Make this workaround only for gfortran as for
8885 other compilers GDB cannot guess the minimal symbol
8886 Fortran mangling kind. */
8887 if (cu
->language
== language_fortran
&& die
->parent
8888 && die
->parent
->tag
== DW_TAG_module
8890 && strncmp (cu
->producer
, "GNU Fortran ", 12) == 0)
8891 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8893 /* A variable with DW_AT_external is never static,
8894 but it may be block-scoped. */
8895 list_to_add
= (cu
->list_in_scope
== &file_symbols
8896 ? &global_symbols
: cu
->list_in_scope
);
8897 add_symbol_to_list (sym
, list_to_add
);
8900 add_symbol_to_list (sym
, cu
->list_in_scope
);
8904 /* We do not know the address of this symbol.
8905 If it is an external symbol and we have type information
8906 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8907 The address of the variable will then be determined from
8908 the minimal symbol table whenever the variable is
8910 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8911 if (attr2
&& (DW_UNSND (attr2
) != 0)
8912 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8914 struct pending
**list_to_add
;
8916 /* A variable with DW_AT_external is never static, but it
8917 may be block-scoped. */
8918 list_to_add
= (cu
->list_in_scope
== &file_symbols
8919 ? &global_symbols
: cu
->list_in_scope
);
8921 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8922 add_symbol_to_list (sym
, list_to_add
);
8924 else if (!die_is_declaration (die
, cu
))
8926 /* Use the default LOC_OPTIMIZED_OUT class. */
8927 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8928 add_symbol_to_list (sym
, cu
->list_in_scope
);
8932 case DW_TAG_formal_parameter
:
8933 /* If we are inside a function, mark this as an argument. If
8934 not, we might be looking at an argument to an inlined function
8935 when we do not have enough information to show inlined frames;
8936 pretend it's a local variable in that case so that the user can
8938 if (context_stack_depth
> 0
8939 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8940 SYMBOL_IS_ARGUMENT (sym
) = 1;
8941 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8944 var_decode_location (attr
, sym
, cu
);
8946 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8949 dwarf2_const_value (attr
, sym
, cu
);
8951 attr
= dwarf2_attr (die
, DW_AT_variable_parameter
, cu
);
8952 if (attr
&& DW_UNSND (attr
))
8954 struct type
*ref_type
;
8956 ref_type
= lookup_reference_type (SYMBOL_TYPE (sym
));
8957 SYMBOL_TYPE (sym
) = ref_type
;
8960 add_symbol_to_list (sym
, cu
->list_in_scope
);
8962 case DW_TAG_unspecified_parameters
:
8963 /* From varargs functions; gdb doesn't seem to have any
8964 interest in this information, so just ignore it for now.
8967 case DW_TAG_class_type
:
8968 case DW_TAG_interface_type
:
8969 case DW_TAG_structure_type
:
8970 case DW_TAG_union_type
:
8971 case DW_TAG_set_type
:
8972 case DW_TAG_enumeration_type
:
8973 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8974 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8977 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8978 really ever be static objects: otherwise, if you try
8979 to, say, break of a class's method and you're in a file
8980 which doesn't mention that class, it won't work unless
8981 the check for all static symbols in lookup_symbol_aux
8982 saves you. See the OtherFileClass tests in
8983 gdb.c++/namespace.exp. */
8985 struct pending
**list_to_add
;
8987 list_to_add
= (cu
->list_in_scope
== &file_symbols
8988 && (cu
->language
== language_cplus
8989 || cu
->language
== language_java
)
8990 ? &global_symbols
: cu
->list_in_scope
);
8992 add_symbol_to_list (sym
, list_to_add
);
8994 /* The semantics of C++ state that "struct foo { ... }" also
8995 defines a typedef for "foo". A Java class declaration also
8996 defines a typedef for the class. */
8997 if (cu
->language
== language_cplus
8998 || cu
->language
== language_java
8999 || cu
->language
== language_ada
)
9001 /* The symbol's name is already allocated along with
9002 this objfile, so we don't need to duplicate it for
9004 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
9005 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
9009 case DW_TAG_typedef
:
9010 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
9011 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
9012 add_symbol_to_list (sym
, cu
->list_in_scope
);
9014 case DW_TAG_base_type
:
9015 case DW_TAG_subrange_type
:
9016 case DW_TAG_const_type
:
9017 case DW_TAG_volatile_type
:
9018 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
9019 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
9020 add_symbol_to_list (sym
, cu
->list_in_scope
);
9022 case DW_TAG_enumerator
:
9023 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
9026 dwarf2_const_value (attr
, sym
, cu
);
9029 /* NOTE: carlton/2003-11-10: See comment above in the
9030 DW_TAG_class_type, etc. block. */
9032 struct pending
**list_to_add
;
9034 list_to_add
= (cu
->list_in_scope
== &file_symbols
9035 && (cu
->language
== language_cplus
9036 || cu
->language
== language_java
)
9037 ? &global_symbols
: cu
->list_in_scope
);
9039 add_symbol_to_list (sym
, list_to_add
);
9042 case DW_TAG_namespace
:
9043 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
9044 add_symbol_to_list (sym
, &global_symbols
);
9047 /* Not a tag we recognize. Hopefully we aren't processing
9048 trash data, but since we must specifically ignore things
9049 we don't recognize, there is nothing else we should do at
9051 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
9052 dwarf_tag_name (die
->tag
));
9056 /* For the benefit of old versions of GCC, check for anonymous
9057 namespaces based on the demangled name. */
9058 if (!processing_has_namespace_info
9059 && cu
->language
== language_cplus
)
9060 cp_scan_for_anonymous_namespaces (sym
);
9065 /* Copy constant value from an attribute to a symbol. */
9068 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
9069 struct dwarf2_cu
*cu
)
9071 struct objfile
*objfile
= cu
->objfile
;
9072 struct comp_unit_head
*cu_header
= &cu
->header
;
9073 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
9074 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
9075 struct dwarf_block
*blk
;
9081 struct dwarf2_locexpr_baton
*baton
;
9084 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
9085 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
9086 cu_header
->addr_size
,
9087 TYPE_LENGTH (SYMBOL_TYPE
9089 /* Symbols of this form are reasonably rare, so we just
9090 piggyback on the existing location code rather than writing
9091 a new implementation of symbol_computed_ops. */
9092 baton
= obstack_alloc (&objfile
->objfile_obstack
,
9093 sizeof (struct dwarf2_locexpr_baton
));
9094 baton
->per_cu
= cu
->per_cu
;
9095 gdb_assert (baton
->per_cu
);
9097 baton
->size
= 2 + cu_header
->addr_size
;
9098 data
= obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
9101 data
[0] = DW_OP_addr
;
9102 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
9103 byte_order
, DW_ADDR (attr
));
9104 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
9106 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
9107 SYMBOL_LOCATION_BATON (sym
) = baton
;
9108 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
9111 case DW_FORM_string
:
9113 /* DW_STRING is already allocated on the obstack, point directly
9115 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
9116 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
9118 case DW_FORM_block1
:
9119 case DW_FORM_block2
:
9120 case DW_FORM_block4
:
9122 case DW_FORM_exprloc
:
9123 blk
= DW_BLOCK (attr
);
9124 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
9125 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
9127 TYPE_LENGTH (SYMBOL_TYPE
9129 SYMBOL_VALUE_BYTES (sym
) =
9130 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
9131 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
9132 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
9135 /* The DW_AT_const_value attributes are supposed to carry the
9136 symbol's value "represented as it would be on the target
9137 architecture." By the time we get here, it's already been
9138 converted to host endianness, so we just need to sign- or
9139 zero-extend it as appropriate. */
9141 dwarf2_const_value_data (attr
, sym
, 8);
9144 dwarf2_const_value_data (attr
, sym
, 16);
9147 dwarf2_const_value_data (attr
, sym
, 32);
9150 dwarf2_const_value_data (attr
, sym
, 64);
9154 SYMBOL_VALUE (sym
) = DW_SND (attr
);
9155 SYMBOL_CLASS (sym
) = LOC_CONST
;
9159 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
9160 SYMBOL_CLASS (sym
) = LOC_CONST
;
9164 complaint (&symfile_complaints
,
9165 _("unsupported const value attribute form: '%s'"),
9166 dwarf_form_name (attr
->form
));
9167 SYMBOL_VALUE (sym
) = 0;
9168 SYMBOL_CLASS (sym
) = LOC_CONST
;
9174 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
9175 or zero-extend it as appropriate for the symbol's type. */
9177 dwarf2_const_value_data (struct attribute
*attr
,
9181 LONGEST l
= DW_UNSND (attr
);
9183 if (bits
< sizeof (l
) * 8)
9185 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
9186 l
&= ((LONGEST
) 1 << bits
) - 1;
9188 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
9191 SYMBOL_VALUE (sym
) = l
;
9192 SYMBOL_CLASS (sym
) = LOC_CONST
;
9196 /* Return the type of the die in question using its DW_AT_type attribute. */
9198 static struct type
*
9199 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9201 struct attribute
*type_attr
;
9202 struct die_info
*type_die
;
9204 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
9207 /* A missing DW_AT_type represents a void type. */
9208 return objfile_type (cu
->objfile
)->builtin_void
;
9211 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
9213 return tag_type_to_type (type_die
, cu
);
9216 /* True iff CU's producer generates GNAT Ada auxiliary information
9217 that allows to find parallel types through that information instead
9218 of having to do expensive parallel lookups by type name. */
9221 need_gnat_info (struct dwarf2_cu
*cu
)
9223 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
9224 of GNAT produces this auxiliary information, without any indication
9225 that it is produced. Part of enhancing the FSF version of GNAT
9226 to produce that information will be to put in place an indicator
9227 that we can use in order to determine whether the descriptive type
9228 info is available or not. One suggestion that has been made is
9229 to use a new attribute, attached to the CU die. For now, assume
9230 that the descriptive type info is not available. */
9235 /* Return the auxiliary type of the die in question using its
9236 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
9237 attribute is not present. */
9239 static struct type
*
9240 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9242 struct attribute
*type_attr
;
9243 struct die_info
*type_die
;
9245 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
9249 type_die
= follow_die_ref (die
, type_attr
, &cu
);
9250 return tag_type_to_type (type_die
, cu
);
9253 /* If DIE has a descriptive_type attribute, then set the TYPE's
9254 descriptive type accordingly. */
9257 set_descriptive_type (struct type
*type
, struct die_info
*die
,
9258 struct dwarf2_cu
*cu
)
9260 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
9262 if (descriptive_type
)
9264 ALLOCATE_GNAT_AUX_TYPE (type
);
9265 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
9269 /* Return the containing type of the die in question using its
9270 DW_AT_containing_type attribute. */
9272 static struct type
*
9273 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9275 struct attribute
*type_attr
;
9276 struct die_info
*type_die
;
9278 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
9280 error (_("Dwarf Error: Problem turning containing type into gdb type "
9281 "[in module %s]"), cu
->objfile
->name
);
9283 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
9284 return tag_type_to_type (type_die
, cu
);
9287 static struct type
*
9288 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9290 struct type
*this_type
;
9292 this_type
= read_type_die (die
, cu
);
9295 char *message
, *saved
;
9297 /* read_type_die already issued a complaint. */
9298 message
= xstrprintf (_("<unknown type in %s, CU 0x%x, DIE 0x%x>"),
9302 saved
= obstack_copy0 (&cu
->objfile
->objfile_obstack
,
9303 message
, strlen (message
));
9306 this_type
= init_type (TYPE_CODE_ERROR
, 0, 0, saved
, cu
->objfile
);
9311 static struct type
*
9312 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9314 struct type
*this_type
;
9316 this_type
= get_die_type (die
, cu
);
9322 case DW_TAG_class_type
:
9323 case DW_TAG_interface_type
:
9324 case DW_TAG_structure_type
:
9325 case DW_TAG_union_type
:
9326 this_type
= read_structure_type (die
, cu
);
9328 case DW_TAG_enumeration_type
:
9329 this_type
= read_enumeration_type (die
, cu
);
9331 case DW_TAG_subprogram
:
9332 case DW_TAG_subroutine_type
:
9333 case DW_TAG_inlined_subroutine
:
9334 this_type
= read_subroutine_type (die
, cu
);
9336 case DW_TAG_array_type
:
9337 this_type
= read_array_type (die
, cu
);
9339 case DW_TAG_set_type
:
9340 this_type
= read_set_type (die
, cu
);
9342 case DW_TAG_pointer_type
:
9343 this_type
= read_tag_pointer_type (die
, cu
);
9345 case DW_TAG_ptr_to_member_type
:
9346 this_type
= read_tag_ptr_to_member_type (die
, cu
);
9348 case DW_TAG_reference_type
:
9349 this_type
= read_tag_reference_type (die
, cu
);
9351 case DW_TAG_const_type
:
9352 this_type
= read_tag_const_type (die
, cu
);
9354 case DW_TAG_volatile_type
:
9355 this_type
= read_tag_volatile_type (die
, cu
);
9357 case DW_TAG_string_type
:
9358 this_type
= read_tag_string_type (die
, cu
);
9360 case DW_TAG_typedef
:
9361 this_type
= read_typedef (die
, cu
);
9363 case DW_TAG_subrange_type
:
9364 this_type
= read_subrange_type (die
, cu
);
9366 case DW_TAG_base_type
:
9367 this_type
= read_base_type (die
, cu
);
9369 case DW_TAG_unspecified_type
:
9370 this_type
= read_unspecified_type (die
, cu
);
9372 case DW_TAG_namespace
:
9373 this_type
= read_namespace_type (die
, cu
);
9376 this_type
= read_module_type (die
, cu
);
9379 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
9380 dwarf_tag_name (die
->tag
));
9387 /* Return the name of the namespace/class that DIE is defined within,
9388 or "" if we can't tell. The caller should not xfree the result.
9390 For example, if we're within the method foo() in the following
9400 then determine_prefix on foo's die will return "N::C". */
9403 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
9405 struct die_info
*parent
, *spec_die
;
9406 struct dwarf2_cu
*spec_cu
;
9407 struct type
*parent_type
;
9409 if (cu
->language
!= language_cplus
&& cu
->language
!= language_java
9410 && cu
->language
!= language_fortran
)
9413 /* We have to be careful in the presence of DW_AT_specification.
9414 For example, with GCC 3.4, given the code
9418 // Definition of N::foo.
9422 then we'll have a tree of DIEs like this:
9424 1: DW_TAG_compile_unit
9425 2: DW_TAG_namespace // N
9426 3: DW_TAG_subprogram // declaration of N::foo
9427 4: DW_TAG_subprogram // definition of N::foo
9428 DW_AT_specification // refers to die #3
9430 Thus, when processing die #4, we have to pretend that we're in
9431 the context of its DW_AT_specification, namely the contex of die
9434 spec_die
= die_specification (die
, &spec_cu
);
9435 if (spec_die
== NULL
)
9436 parent
= die
->parent
;
9439 parent
= spec_die
->parent
;
9446 switch (parent
->tag
)
9448 case DW_TAG_namespace
:
9449 parent_type
= read_type_die (parent
, cu
);
9450 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
9451 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
9452 Work around this problem here. */
9453 if (cu
->language
== language_cplus
9454 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
9456 /* We give a name to even anonymous namespaces. */
9457 return TYPE_TAG_NAME (parent_type
);
9458 case DW_TAG_class_type
:
9459 case DW_TAG_interface_type
:
9460 case DW_TAG_structure_type
:
9461 case DW_TAG_union_type
:
9463 parent_type
= read_type_die (parent
, cu
);
9464 if (TYPE_TAG_NAME (parent_type
) != NULL
)
9465 return TYPE_TAG_NAME (parent_type
);
9467 /* An anonymous structure is only allowed non-static data
9468 members; no typedefs, no member functions, et cetera.
9469 So it does not need a prefix. */
9472 return determine_prefix (parent
, cu
);
9476 /* Return a newly-allocated string formed by concatenating PREFIX and
9477 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9478 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9479 perform an obconcat, otherwise allocate storage for the result. The CU argument
9480 is used to determine the language and hence, the appropriate separator. */
9482 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
9485 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
9486 int physname
, struct dwarf2_cu
*cu
)
9488 const char *lead
= "";
9491 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
9493 else if (cu
->language
== language_java
)
9495 else if (cu
->language
== language_fortran
&& physname
)
9497 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
9498 DW_AT_MIPS_linkage_name is preferred and used instead. */
9513 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
9515 strcpy (retval
, lead
);
9516 strcat (retval
, prefix
);
9517 strcat (retval
, sep
);
9518 strcat (retval
, suffix
);
9523 /* We have an obstack. */
9524 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
9528 /* Return sibling of die, NULL if no sibling. */
9530 static struct die_info
*
9531 sibling_die (struct die_info
*die
)
9533 return die
->sibling
;
9536 /* Get name of a die, return NULL if not found. */
9539 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9540 struct obstack
*obstack
)
9542 if (name
&& cu
->language
== language_cplus
)
9544 char *canon_name
= cp_canonicalize_string (name
);
9546 if (canon_name
!= NULL
)
9548 if (strcmp (canon_name
, name
) != 0)
9549 name
= obsavestring (canon_name
, strlen (canon_name
),
9558 /* Get name of a die, return NULL if not found. */
9561 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9563 struct attribute
*attr
;
9565 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9566 if (!attr
|| !DW_STRING (attr
))
9571 case DW_TAG_compile_unit
:
9572 /* Compilation units have a DW_AT_name that is a filename, not
9573 a source language identifier. */
9574 case DW_TAG_enumeration_type
:
9575 case DW_TAG_enumerator
:
9576 /* These tags always have simple identifiers already; no need
9577 to canonicalize them. */
9578 return DW_STRING (attr
);
9580 case DW_TAG_subprogram
:
9581 /* Java constructors will all be named "<init>", so return
9582 the class name when we see this special case. */
9583 if (cu
->language
== language_java
9584 && DW_STRING (attr
) != NULL
9585 && strcmp (DW_STRING (attr
), "<init>") == 0)
9587 struct dwarf2_cu
*spec_cu
= cu
;
9588 struct die_info
*spec_die
;
9590 /* GCJ will output '<init>' for Java constructor names.
9591 For this special case, return the name of the parent class. */
9593 /* GCJ may output suprogram DIEs with AT_specification set.
9594 If so, use the name of the specified DIE. */
9595 spec_die
= die_specification (die
, &spec_cu
);
9596 if (spec_die
!= NULL
)
9597 return dwarf2_name (spec_die
, spec_cu
);
9602 if (die
->tag
== DW_TAG_class_type
)
9603 return dwarf2_name (die
, cu
);
9605 while (die
->tag
!= DW_TAG_compile_unit
);
9609 case DW_TAG_class_type
:
9610 case DW_TAG_interface_type
:
9611 case DW_TAG_structure_type
:
9612 case DW_TAG_union_type
:
9613 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
9614 structures or unions. These were of the form "._%d" in GCC 4.1,
9615 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
9616 and GCC 4.4. We work around this problem by ignoring these. */
9617 if (strncmp (DW_STRING (attr
), "._", 2) == 0
9618 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
9626 if (!DW_STRING_IS_CANONICAL (attr
))
9629 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9630 &cu
->objfile
->objfile_obstack
);
9631 DW_STRING_IS_CANONICAL (attr
) = 1;
9633 return DW_STRING (attr
);
9636 /* Return the die that this die in an extension of, or NULL if there
9637 is none. *EXT_CU is the CU containing DIE on input, and the CU
9638 containing the return value on output. */
9640 static struct die_info
*
9641 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9643 struct attribute
*attr
;
9645 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9649 return follow_die_ref (die
, attr
, ext_cu
);
9652 /* Convert a DIE tag into its string name. */
9655 dwarf_tag_name (unsigned tag
)
9659 case DW_TAG_padding
:
9660 return "DW_TAG_padding";
9661 case DW_TAG_array_type
:
9662 return "DW_TAG_array_type";
9663 case DW_TAG_class_type
:
9664 return "DW_TAG_class_type";
9665 case DW_TAG_entry_point
:
9666 return "DW_TAG_entry_point";
9667 case DW_TAG_enumeration_type
:
9668 return "DW_TAG_enumeration_type";
9669 case DW_TAG_formal_parameter
:
9670 return "DW_TAG_formal_parameter";
9671 case DW_TAG_imported_declaration
:
9672 return "DW_TAG_imported_declaration";
9674 return "DW_TAG_label";
9675 case DW_TAG_lexical_block
:
9676 return "DW_TAG_lexical_block";
9678 return "DW_TAG_member";
9679 case DW_TAG_pointer_type
:
9680 return "DW_TAG_pointer_type";
9681 case DW_TAG_reference_type
:
9682 return "DW_TAG_reference_type";
9683 case DW_TAG_compile_unit
:
9684 return "DW_TAG_compile_unit";
9685 case DW_TAG_string_type
:
9686 return "DW_TAG_string_type";
9687 case DW_TAG_structure_type
:
9688 return "DW_TAG_structure_type";
9689 case DW_TAG_subroutine_type
:
9690 return "DW_TAG_subroutine_type";
9691 case DW_TAG_typedef
:
9692 return "DW_TAG_typedef";
9693 case DW_TAG_union_type
:
9694 return "DW_TAG_union_type";
9695 case DW_TAG_unspecified_parameters
:
9696 return "DW_TAG_unspecified_parameters";
9697 case DW_TAG_variant
:
9698 return "DW_TAG_variant";
9699 case DW_TAG_common_block
:
9700 return "DW_TAG_common_block";
9701 case DW_TAG_common_inclusion
:
9702 return "DW_TAG_common_inclusion";
9703 case DW_TAG_inheritance
:
9704 return "DW_TAG_inheritance";
9705 case DW_TAG_inlined_subroutine
:
9706 return "DW_TAG_inlined_subroutine";
9708 return "DW_TAG_module";
9709 case DW_TAG_ptr_to_member_type
:
9710 return "DW_TAG_ptr_to_member_type";
9711 case DW_TAG_set_type
:
9712 return "DW_TAG_set_type";
9713 case DW_TAG_subrange_type
:
9714 return "DW_TAG_subrange_type";
9715 case DW_TAG_with_stmt
:
9716 return "DW_TAG_with_stmt";
9717 case DW_TAG_access_declaration
:
9718 return "DW_TAG_access_declaration";
9719 case DW_TAG_base_type
:
9720 return "DW_TAG_base_type";
9721 case DW_TAG_catch_block
:
9722 return "DW_TAG_catch_block";
9723 case DW_TAG_const_type
:
9724 return "DW_TAG_const_type";
9725 case DW_TAG_constant
:
9726 return "DW_TAG_constant";
9727 case DW_TAG_enumerator
:
9728 return "DW_TAG_enumerator";
9729 case DW_TAG_file_type
:
9730 return "DW_TAG_file_type";
9732 return "DW_TAG_friend";
9733 case DW_TAG_namelist
:
9734 return "DW_TAG_namelist";
9735 case DW_TAG_namelist_item
:
9736 return "DW_TAG_namelist_item";
9737 case DW_TAG_packed_type
:
9738 return "DW_TAG_packed_type";
9739 case DW_TAG_subprogram
:
9740 return "DW_TAG_subprogram";
9741 case DW_TAG_template_type_param
:
9742 return "DW_TAG_template_type_param";
9743 case DW_TAG_template_value_param
:
9744 return "DW_TAG_template_value_param";
9745 case DW_TAG_thrown_type
:
9746 return "DW_TAG_thrown_type";
9747 case DW_TAG_try_block
:
9748 return "DW_TAG_try_block";
9749 case DW_TAG_variant_part
:
9750 return "DW_TAG_variant_part";
9751 case DW_TAG_variable
:
9752 return "DW_TAG_variable";
9753 case DW_TAG_volatile_type
:
9754 return "DW_TAG_volatile_type";
9755 case DW_TAG_dwarf_procedure
:
9756 return "DW_TAG_dwarf_procedure";
9757 case DW_TAG_restrict_type
:
9758 return "DW_TAG_restrict_type";
9759 case DW_TAG_interface_type
:
9760 return "DW_TAG_interface_type";
9761 case DW_TAG_namespace
:
9762 return "DW_TAG_namespace";
9763 case DW_TAG_imported_module
:
9764 return "DW_TAG_imported_module";
9765 case DW_TAG_unspecified_type
:
9766 return "DW_TAG_unspecified_type";
9767 case DW_TAG_partial_unit
:
9768 return "DW_TAG_partial_unit";
9769 case DW_TAG_imported_unit
:
9770 return "DW_TAG_imported_unit";
9771 case DW_TAG_condition
:
9772 return "DW_TAG_condition";
9773 case DW_TAG_shared_type
:
9774 return "DW_TAG_shared_type";
9775 case DW_TAG_type_unit
:
9776 return "DW_TAG_type_unit";
9777 case DW_TAG_MIPS_loop
:
9778 return "DW_TAG_MIPS_loop";
9779 case DW_TAG_HP_array_descriptor
:
9780 return "DW_TAG_HP_array_descriptor";
9781 case DW_TAG_format_label
:
9782 return "DW_TAG_format_label";
9783 case DW_TAG_function_template
:
9784 return "DW_TAG_function_template";
9785 case DW_TAG_class_template
:
9786 return "DW_TAG_class_template";
9787 case DW_TAG_GNU_BINCL
:
9788 return "DW_TAG_GNU_BINCL";
9789 case DW_TAG_GNU_EINCL
:
9790 return "DW_TAG_GNU_EINCL";
9791 case DW_TAG_upc_shared_type
:
9792 return "DW_TAG_upc_shared_type";
9793 case DW_TAG_upc_strict_type
:
9794 return "DW_TAG_upc_strict_type";
9795 case DW_TAG_upc_relaxed_type
:
9796 return "DW_TAG_upc_relaxed_type";
9797 case DW_TAG_PGI_kanji_type
:
9798 return "DW_TAG_PGI_kanji_type";
9799 case DW_TAG_PGI_interface_block
:
9800 return "DW_TAG_PGI_interface_block";
9802 return "DW_TAG_<unknown>";
9806 /* Convert a DWARF attribute code into its string name. */
9809 dwarf_attr_name (unsigned attr
)
9814 return "DW_AT_sibling";
9815 case DW_AT_location
:
9816 return "DW_AT_location";
9818 return "DW_AT_name";
9819 case DW_AT_ordering
:
9820 return "DW_AT_ordering";
9821 case DW_AT_subscr_data
:
9822 return "DW_AT_subscr_data";
9823 case DW_AT_byte_size
:
9824 return "DW_AT_byte_size";
9825 case DW_AT_bit_offset
:
9826 return "DW_AT_bit_offset";
9827 case DW_AT_bit_size
:
9828 return "DW_AT_bit_size";
9829 case DW_AT_element_list
:
9830 return "DW_AT_element_list";
9831 case DW_AT_stmt_list
:
9832 return "DW_AT_stmt_list";
9834 return "DW_AT_low_pc";
9836 return "DW_AT_high_pc";
9837 case DW_AT_language
:
9838 return "DW_AT_language";
9840 return "DW_AT_member";
9842 return "DW_AT_discr";
9843 case DW_AT_discr_value
:
9844 return "DW_AT_discr_value";
9845 case DW_AT_visibility
:
9846 return "DW_AT_visibility";
9848 return "DW_AT_import";
9849 case DW_AT_string_length
:
9850 return "DW_AT_string_length";
9851 case DW_AT_common_reference
:
9852 return "DW_AT_common_reference";
9853 case DW_AT_comp_dir
:
9854 return "DW_AT_comp_dir";
9855 case DW_AT_const_value
:
9856 return "DW_AT_const_value";
9857 case DW_AT_containing_type
:
9858 return "DW_AT_containing_type";
9859 case DW_AT_default_value
:
9860 return "DW_AT_default_value";
9862 return "DW_AT_inline";
9863 case DW_AT_is_optional
:
9864 return "DW_AT_is_optional";
9865 case DW_AT_lower_bound
:
9866 return "DW_AT_lower_bound";
9867 case DW_AT_producer
:
9868 return "DW_AT_producer";
9869 case DW_AT_prototyped
:
9870 return "DW_AT_prototyped";
9871 case DW_AT_return_addr
:
9872 return "DW_AT_return_addr";
9873 case DW_AT_start_scope
:
9874 return "DW_AT_start_scope";
9875 case DW_AT_bit_stride
:
9876 return "DW_AT_bit_stride";
9877 case DW_AT_upper_bound
:
9878 return "DW_AT_upper_bound";
9879 case DW_AT_abstract_origin
:
9880 return "DW_AT_abstract_origin";
9881 case DW_AT_accessibility
:
9882 return "DW_AT_accessibility";
9883 case DW_AT_address_class
:
9884 return "DW_AT_address_class";
9885 case DW_AT_artificial
:
9886 return "DW_AT_artificial";
9887 case DW_AT_base_types
:
9888 return "DW_AT_base_types";
9889 case DW_AT_calling_convention
:
9890 return "DW_AT_calling_convention";
9892 return "DW_AT_count";
9893 case DW_AT_data_member_location
:
9894 return "DW_AT_data_member_location";
9895 case DW_AT_decl_column
:
9896 return "DW_AT_decl_column";
9897 case DW_AT_decl_file
:
9898 return "DW_AT_decl_file";
9899 case DW_AT_decl_line
:
9900 return "DW_AT_decl_line";
9901 case DW_AT_declaration
:
9902 return "DW_AT_declaration";
9903 case DW_AT_discr_list
:
9904 return "DW_AT_discr_list";
9905 case DW_AT_encoding
:
9906 return "DW_AT_encoding";
9907 case DW_AT_external
:
9908 return "DW_AT_external";
9909 case DW_AT_frame_base
:
9910 return "DW_AT_frame_base";
9912 return "DW_AT_friend";
9913 case DW_AT_identifier_case
:
9914 return "DW_AT_identifier_case";
9915 case DW_AT_macro_info
:
9916 return "DW_AT_macro_info";
9917 case DW_AT_namelist_items
:
9918 return "DW_AT_namelist_items";
9919 case DW_AT_priority
:
9920 return "DW_AT_priority";
9922 return "DW_AT_segment";
9923 case DW_AT_specification
:
9924 return "DW_AT_specification";
9925 case DW_AT_static_link
:
9926 return "DW_AT_static_link";
9928 return "DW_AT_type";
9929 case DW_AT_use_location
:
9930 return "DW_AT_use_location";
9931 case DW_AT_variable_parameter
:
9932 return "DW_AT_variable_parameter";
9933 case DW_AT_virtuality
:
9934 return "DW_AT_virtuality";
9935 case DW_AT_vtable_elem_location
:
9936 return "DW_AT_vtable_elem_location";
9937 /* DWARF 3 values. */
9938 case DW_AT_allocated
:
9939 return "DW_AT_allocated";
9940 case DW_AT_associated
:
9941 return "DW_AT_associated";
9942 case DW_AT_data_location
:
9943 return "DW_AT_data_location";
9944 case DW_AT_byte_stride
:
9945 return "DW_AT_byte_stride";
9946 case DW_AT_entry_pc
:
9947 return "DW_AT_entry_pc";
9948 case DW_AT_use_UTF8
:
9949 return "DW_AT_use_UTF8";
9950 case DW_AT_extension
:
9951 return "DW_AT_extension";
9953 return "DW_AT_ranges";
9954 case DW_AT_trampoline
:
9955 return "DW_AT_trampoline";
9956 case DW_AT_call_column
:
9957 return "DW_AT_call_column";
9958 case DW_AT_call_file
:
9959 return "DW_AT_call_file";
9960 case DW_AT_call_line
:
9961 return "DW_AT_call_line";
9962 case DW_AT_description
:
9963 return "DW_AT_description";
9964 case DW_AT_binary_scale
:
9965 return "DW_AT_binary_scale";
9966 case DW_AT_decimal_scale
:
9967 return "DW_AT_decimal_scale";
9969 return "DW_AT_small";
9970 case DW_AT_decimal_sign
:
9971 return "DW_AT_decimal_sign";
9972 case DW_AT_digit_count
:
9973 return "DW_AT_digit_count";
9974 case DW_AT_picture_string
:
9975 return "DW_AT_picture_string";
9977 return "DW_AT_mutable";
9978 case DW_AT_threads_scaled
:
9979 return "DW_AT_threads_scaled";
9980 case DW_AT_explicit
:
9981 return "DW_AT_explicit";
9982 case DW_AT_object_pointer
:
9983 return "DW_AT_object_pointer";
9984 case DW_AT_endianity
:
9985 return "DW_AT_endianity";
9986 case DW_AT_elemental
:
9987 return "DW_AT_elemental";
9989 return "DW_AT_pure";
9990 case DW_AT_recursive
:
9991 return "DW_AT_recursive";
9992 /* DWARF 4 values. */
9993 case DW_AT_signature
:
9994 return "DW_AT_signature";
9995 case DW_AT_linkage_name
:
9996 return "DW_AT_linkage_name";
9997 /* SGI/MIPS extensions. */
9998 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9999 case DW_AT_MIPS_fde
:
10000 return "DW_AT_MIPS_fde";
10002 case DW_AT_MIPS_loop_begin
:
10003 return "DW_AT_MIPS_loop_begin";
10004 case DW_AT_MIPS_tail_loop_begin
:
10005 return "DW_AT_MIPS_tail_loop_begin";
10006 case DW_AT_MIPS_epilog_begin
:
10007 return "DW_AT_MIPS_epilog_begin";
10008 case DW_AT_MIPS_loop_unroll_factor
:
10009 return "DW_AT_MIPS_loop_unroll_factor";
10010 case DW_AT_MIPS_software_pipeline_depth
:
10011 return "DW_AT_MIPS_software_pipeline_depth";
10012 case DW_AT_MIPS_linkage_name
:
10013 return "DW_AT_MIPS_linkage_name";
10014 case DW_AT_MIPS_stride
:
10015 return "DW_AT_MIPS_stride";
10016 case DW_AT_MIPS_abstract_name
:
10017 return "DW_AT_MIPS_abstract_name";
10018 case DW_AT_MIPS_clone_origin
:
10019 return "DW_AT_MIPS_clone_origin";
10020 case DW_AT_MIPS_has_inlines
:
10021 return "DW_AT_MIPS_has_inlines";
10022 /* HP extensions. */
10023 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
10024 case DW_AT_HP_block_index
:
10025 return "DW_AT_HP_block_index";
10027 case DW_AT_HP_unmodifiable
:
10028 return "DW_AT_HP_unmodifiable";
10029 case DW_AT_HP_actuals_stmt_list
:
10030 return "DW_AT_HP_actuals_stmt_list";
10031 case DW_AT_HP_proc_per_section
:
10032 return "DW_AT_HP_proc_per_section";
10033 case DW_AT_HP_raw_data_ptr
:
10034 return "DW_AT_HP_raw_data_ptr";
10035 case DW_AT_HP_pass_by_reference
:
10036 return "DW_AT_HP_pass_by_reference";
10037 case DW_AT_HP_opt_level
:
10038 return "DW_AT_HP_opt_level";
10039 case DW_AT_HP_prof_version_id
:
10040 return "DW_AT_HP_prof_version_id";
10041 case DW_AT_HP_opt_flags
:
10042 return "DW_AT_HP_opt_flags";
10043 case DW_AT_HP_cold_region_low_pc
:
10044 return "DW_AT_HP_cold_region_low_pc";
10045 case DW_AT_HP_cold_region_high_pc
:
10046 return "DW_AT_HP_cold_region_high_pc";
10047 case DW_AT_HP_all_variables_modifiable
:
10048 return "DW_AT_HP_all_variables_modifiable";
10049 case DW_AT_HP_linkage_name
:
10050 return "DW_AT_HP_linkage_name";
10051 case DW_AT_HP_prof_flags
:
10052 return "DW_AT_HP_prof_flags";
10053 /* GNU extensions. */
10054 case DW_AT_sf_names
:
10055 return "DW_AT_sf_names";
10056 case DW_AT_src_info
:
10057 return "DW_AT_src_info";
10058 case DW_AT_mac_info
:
10059 return "DW_AT_mac_info";
10060 case DW_AT_src_coords
:
10061 return "DW_AT_src_coords";
10062 case DW_AT_body_begin
:
10063 return "DW_AT_body_begin";
10064 case DW_AT_body_end
:
10065 return "DW_AT_body_end";
10066 case DW_AT_GNU_vector
:
10067 return "DW_AT_GNU_vector";
10068 /* VMS extensions. */
10069 case DW_AT_VMS_rtnbeg_pd_address
:
10070 return "DW_AT_VMS_rtnbeg_pd_address";
10071 /* UPC extension. */
10072 case DW_AT_upc_threads_scaled
:
10073 return "DW_AT_upc_threads_scaled";
10074 /* PGI (STMicroelectronics) extensions. */
10075 case DW_AT_PGI_lbase
:
10076 return "DW_AT_PGI_lbase";
10077 case DW_AT_PGI_soffset
:
10078 return "DW_AT_PGI_soffset";
10079 case DW_AT_PGI_lstride
:
10080 return "DW_AT_PGI_lstride";
10082 return "DW_AT_<unknown>";
10086 /* Convert a DWARF value form code into its string name. */
10089 dwarf_form_name (unsigned form
)
10094 return "DW_FORM_addr";
10095 case DW_FORM_block2
:
10096 return "DW_FORM_block2";
10097 case DW_FORM_block4
:
10098 return "DW_FORM_block4";
10099 case DW_FORM_data2
:
10100 return "DW_FORM_data2";
10101 case DW_FORM_data4
:
10102 return "DW_FORM_data4";
10103 case DW_FORM_data8
:
10104 return "DW_FORM_data8";
10105 case DW_FORM_string
:
10106 return "DW_FORM_string";
10107 case DW_FORM_block
:
10108 return "DW_FORM_block";
10109 case DW_FORM_block1
:
10110 return "DW_FORM_block1";
10111 case DW_FORM_data1
:
10112 return "DW_FORM_data1";
10114 return "DW_FORM_flag";
10115 case DW_FORM_sdata
:
10116 return "DW_FORM_sdata";
10118 return "DW_FORM_strp";
10119 case DW_FORM_udata
:
10120 return "DW_FORM_udata";
10121 case DW_FORM_ref_addr
:
10122 return "DW_FORM_ref_addr";
10124 return "DW_FORM_ref1";
10126 return "DW_FORM_ref2";
10128 return "DW_FORM_ref4";
10130 return "DW_FORM_ref8";
10131 case DW_FORM_ref_udata
:
10132 return "DW_FORM_ref_udata";
10133 case DW_FORM_indirect
:
10134 return "DW_FORM_indirect";
10135 case DW_FORM_sec_offset
:
10136 return "DW_FORM_sec_offset";
10137 case DW_FORM_exprloc
:
10138 return "DW_FORM_exprloc";
10139 case DW_FORM_flag_present
:
10140 return "DW_FORM_flag_present";
10142 return "DW_FORM_sig8";
10144 return "DW_FORM_<unknown>";
10148 /* Convert a DWARF stack opcode into its string name. */
10151 dwarf_stack_op_name (unsigned op
, int def
)
10156 return "DW_OP_addr";
10158 return "DW_OP_deref";
10159 case DW_OP_const1u
:
10160 return "DW_OP_const1u";
10161 case DW_OP_const1s
:
10162 return "DW_OP_const1s";
10163 case DW_OP_const2u
:
10164 return "DW_OP_const2u";
10165 case DW_OP_const2s
:
10166 return "DW_OP_const2s";
10167 case DW_OP_const4u
:
10168 return "DW_OP_const4u";
10169 case DW_OP_const4s
:
10170 return "DW_OP_const4s";
10171 case DW_OP_const8u
:
10172 return "DW_OP_const8u";
10173 case DW_OP_const8s
:
10174 return "DW_OP_const8s";
10176 return "DW_OP_constu";
10178 return "DW_OP_consts";
10180 return "DW_OP_dup";
10182 return "DW_OP_drop";
10184 return "DW_OP_over";
10186 return "DW_OP_pick";
10188 return "DW_OP_swap";
10190 return "DW_OP_rot";
10192 return "DW_OP_xderef";
10194 return "DW_OP_abs";
10196 return "DW_OP_and";
10198 return "DW_OP_div";
10200 return "DW_OP_minus";
10202 return "DW_OP_mod";
10204 return "DW_OP_mul";
10206 return "DW_OP_neg";
10208 return "DW_OP_not";
10212 return "DW_OP_plus";
10213 case DW_OP_plus_uconst
:
10214 return "DW_OP_plus_uconst";
10216 return "DW_OP_shl";
10218 return "DW_OP_shr";
10220 return "DW_OP_shra";
10222 return "DW_OP_xor";
10224 return "DW_OP_bra";
10238 return "DW_OP_skip";
10240 return "DW_OP_lit0";
10242 return "DW_OP_lit1";
10244 return "DW_OP_lit2";
10246 return "DW_OP_lit3";
10248 return "DW_OP_lit4";
10250 return "DW_OP_lit5";
10252 return "DW_OP_lit6";
10254 return "DW_OP_lit7";
10256 return "DW_OP_lit8";
10258 return "DW_OP_lit9";
10260 return "DW_OP_lit10";
10262 return "DW_OP_lit11";
10264 return "DW_OP_lit12";
10266 return "DW_OP_lit13";
10268 return "DW_OP_lit14";
10270 return "DW_OP_lit15";
10272 return "DW_OP_lit16";
10274 return "DW_OP_lit17";
10276 return "DW_OP_lit18";
10278 return "DW_OP_lit19";
10280 return "DW_OP_lit20";
10282 return "DW_OP_lit21";
10284 return "DW_OP_lit22";
10286 return "DW_OP_lit23";
10288 return "DW_OP_lit24";
10290 return "DW_OP_lit25";
10292 return "DW_OP_lit26";
10294 return "DW_OP_lit27";
10296 return "DW_OP_lit28";
10298 return "DW_OP_lit29";
10300 return "DW_OP_lit30";
10302 return "DW_OP_lit31";
10304 return "DW_OP_reg0";
10306 return "DW_OP_reg1";
10308 return "DW_OP_reg2";
10310 return "DW_OP_reg3";
10312 return "DW_OP_reg4";
10314 return "DW_OP_reg5";
10316 return "DW_OP_reg6";
10318 return "DW_OP_reg7";
10320 return "DW_OP_reg8";
10322 return "DW_OP_reg9";
10324 return "DW_OP_reg10";
10326 return "DW_OP_reg11";
10328 return "DW_OP_reg12";
10330 return "DW_OP_reg13";
10332 return "DW_OP_reg14";
10334 return "DW_OP_reg15";
10336 return "DW_OP_reg16";
10338 return "DW_OP_reg17";
10340 return "DW_OP_reg18";
10342 return "DW_OP_reg19";
10344 return "DW_OP_reg20";
10346 return "DW_OP_reg21";
10348 return "DW_OP_reg22";
10350 return "DW_OP_reg23";
10352 return "DW_OP_reg24";
10354 return "DW_OP_reg25";
10356 return "DW_OP_reg26";
10358 return "DW_OP_reg27";
10360 return "DW_OP_reg28";
10362 return "DW_OP_reg29";
10364 return "DW_OP_reg30";
10366 return "DW_OP_reg31";
10368 return "DW_OP_breg0";
10370 return "DW_OP_breg1";
10372 return "DW_OP_breg2";
10374 return "DW_OP_breg3";
10376 return "DW_OP_breg4";
10378 return "DW_OP_breg5";
10380 return "DW_OP_breg6";
10382 return "DW_OP_breg7";
10384 return "DW_OP_breg8";
10386 return "DW_OP_breg9";
10388 return "DW_OP_breg10";
10390 return "DW_OP_breg11";
10392 return "DW_OP_breg12";
10394 return "DW_OP_breg13";
10396 return "DW_OP_breg14";
10398 return "DW_OP_breg15";
10400 return "DW_OP_breg16";
10402 return "DW_OP_breg17";
10404 return "DW_OP_breg18";
10406 return "DW_OP_breg19";
10408 return "DW_OP_breg20";
10410 return "DW_OP_breg21";
10412 return "DW_OP_breg22";
10414 return "DW_OP_breg23";
10416 return "DW_OP_breg24";
10418 return "DW_OP_breg25";
10420 return "DW_OP_breg26";
10422 return "DW_OP_breg27";
10424 return "DW_OP_breg28";
10426 return "DW_OP_breg29";
10428 return "DW_OP_breg30";
10430 return "DW_OP_breg31";
10432 return "DW_OP_regx";
10434 return "DW_OP_fbreg";
10436 return "DW_OP_bregx";
10438 return "DW_OP_piece";
10439 case DW_OP_deref_size
:
10440 return "DW_OP_deref_size";
10441 case DW_OP_xderef_size
:
10442 return "DW_OP_xderef_size";
10444 return "DW_OP_nop";
10445 /* DWARF 3 extensions. */
10446 case DW_OP_push_object_address
:
10447 return "DW_OP_push_object_address";
10449 return "DW_OP_call2";
10451 return "DW_OP_call4";
10452 case DW_OP_call_ref
:
10453 return "DW_OP_call_ref";
10454 case DW_OP_form_tls_address
:
10455 return "DW_OP_form_tls_address";
10456 case DW_OP_call_frame_cfa
:
10457 return "DW_OP_call_frame_cfa";
10458 case DW_OP_bit_piece
:
10459 return "DW_OP_bit_piece";
10460 /* DWARF 4 extensions. */
10461 case DW_OP_implicit_value
:
10462 return "DW_OP_implicit_value";
10463 case DW_OP_stack_value
:
10464 return "DW_OP_stack_value";
10465 /* GNU extensions. */
10466 case DW_OP_GNU_push_tls_address
:
10467 return "DW_OP_GNU_push_tls_address";
10468 case DW_OP_GNU_uninit
:
10469 return "DW_OP_GNU_uninit";
10471 return def
? "OP_<unknown>" : NULL
;
10476 dwarf_bool_name (unsigned mybool
)
10484 /* Convert a DWARF type code into its string name. */
10487 dwarf_type_encoding_name (unsigned enc
)
10492 return "DW_ATE_void";
10493 case DW_ATE_address
:
10494 return "DW_ATE_address";
10495 case DW_ATE_boolean
:
10496 return "DW_ATE_boolean";
10497 case DW_ATE_complex_float
:
10498 return "DW_ATE_complex_float";
10500 return "DW_ATE_float";
10501 case DW_ATE_signed
:
10502 return "DW_ATE_signed";
10503 case DW_ATE_signed_char
:
10504 return "DW_ATE_signed_char";
10505 case DW_ATE_unsigned
:
10506 return "DW_ATE_unsigned";
10507 case DW_ATE_unsigned_char
:
10508 return "DW_ATE_unsigned_char";
10510 case DW_ATE_imaginary_float
:
10511 return "DW_ATE_imaginary_float";
10512 case DW_ATE_packed_decimal
:
10513 return "DW_ATE_packed_decimal";
10514 case DW_ATE_numeric_string
:
10515 return "DW_ATE_numeric_string";
10516 case DW_ATE_edited
:
10517 return "DW_ATE_edited";
10518 case DW_ATE_signed_fixed
:
10519 return "DW_ATE_signed_fixed";
10520 case DW_ATE_unsigned_fixed
:
10521 return "DW_ATE_unsigned_fixed";
10522 case DW_ATE_decimal_float
:
10523 return "DW_ATE_decimal_float";
10526 return "DW_ATE_UTF";
10527 /* HP extensions. */
10528 case DW_ATE_HP_float80
:
10529 return "DW_ATE_HP_float80";
10530 case DW_ATE_HP_complex_float80
:
10531 return "DW_ATE_HP_complex_float80";
10532 case DW_ATE_HP_float128
:
10533 return "DW_ATE_HP_float128";
10534 case DW_ATE_HP_complex_float128
:
10535 return "DW_ATE_HP_complex_float128";
10536 case DW_ATE_HP_floathpintel
:
10537 return "DW_ATE_HP_floathpintel";
10538 case DW_ATE_HP_imaginary_float80
:
10539 return "DW_ATE_HP_imaginary_float80";
10540 case DW_ATE_HP_imaginary_float128
:
10541 return "DW_ATE_HP_imaginary_float128";
10543 return "DW_ATE_<unknown>";
10547 /* Convert a DWARF call frame info operation to its string name. */
10551 dwarf_cfi_name (unsigned cfi_opc
)
10555 case DW_CFA_advance_loc
:
10556 return "DW_CFA_advance_loc";
10557 case DW_CFA_offset
:
10558 return "DW_CFA_offset";
10559 case DW_CFA_restore
:
10560 return "DW_CFA_restore";
10562 return "DW_CFA_nop";
10563 case DW_CFA_set_loc
:
10564 return "DW_CFA_set_loc";
10565 case DW_CFA_advance_loc1
:
10566 return "DW_CFA_advance_loc1";
10567 case DW_CFA_advance_loc2
:
10568 return "DW_CFA_advance_loc2";
10569 case DW_CFA_advance_loc4
:
10570 return "DW_CFA_advance_loc4";
10571 case DW_CFA_offset_extended
:
10572 return "DW_CFA_offset_extended";
10573 case DW_CFA_restore_extended
:
10574 return "DW_CFA_restore_extended";
10575 case DW_CFA_undefined
:
10576 return "DW_CFA_undefined";
10577 case DW_CFA_same_value
:
10578 return "DW_CFA_same_value";
10579 case DW_CFA_register
:
10580 return "DW_CFA_register";
10581 case DW_CFA_remember_state
:
10582 return "DW_CFA_remember_state";
10583 case DW_CFA_restore_state
:
10584 return "DW_CFA_restore_state";
10585 case DW_CFA_def_cfa
:
10586 return "DW_CFA_def_cfa";
10587 case DW_CFA_def_cfa_register
:
10588 return "DW_CFA_def_cfa_register";
10589 case DW_CFA_def_cfa_offset
:
10590 return "DW_CFA_def_cfa_offset";
10592 case DW_CFA_def_cfa_expression
:
10593 return "DW_CFA_def_cfa_expression";
10594 case DW_CFA_expression
:
10595 return "DW_CFA_expression";
10596 case DW_CFA_offset_extended_sf
:
10597 return "DW_CFA_offset_extended_sf";
10598 case DW_CFA_def_cfa_sf
:
10599 return "DW_CFA_def_cfa_sf";
10600 case DW_CFA_def_cfa_offset_sf
:
10601 return "DW_CFA_def_cfa_offset_sf";
10602 case DW_CFA_val_offset
:
10603 return "DW_CFA_val_offset";
10604 case DW_CFA_val_offset_sf
:
10605 return "DW_CFA_val_offset_sf";
10606 case DW_CFA_val_expression
:
10607 return "DW_CFA_val_expression";
10608 /* SGI/MIPS specific. */
10609 case DW_CFA_MIPS_advance_loc8
:
10610 return "DW_CFA_MIPS_advance_loc8";
10611 /* GNU extensions. */
10612 case DW_CFA_GNU_window_save
:
10613 return "DW_CFA_GNU_window_save";
10614 case DW_CFA_GNU_args_size
:
10615 return "DW_CFA_GNU_args_size";
10616 case DW_CFA_GNU_negative_offset_extended
:
10617 return "DW_CFA_GNU_negative_offset_extended";
10619 return "DW_CFA_<unknown>";
10625 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10629 print_spaces (indent
, f
);
10630 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10631 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10633 if (die
->parent
!= NULL
)
10635 print_spaces (indent
, f
);
10636 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10637 die
->parent
->offset
);
10640 print_spaces (indent
, f
);
10641 fprintf_unfiltered (f
, " has children: %s\n",
10642 dwarf_bool_name (die
->child
!= NULL
));
10644 print_spaces (indent
, f
);
10645 fprintf_unfiltered (f
, " attributes:\n");
10647 for (i
= 0; i
< die
->num_attrs
; ++i
)
10649 print_spaces (indent
, f
);
10650 fprintf_unfiltered (f
, " %s (%s) ",
10651 dwarf_attr_name (die
->attrs
[i
].name
),
10652 dwarf_form_name (die
->attrs
[i
].form
));
10654 switch (die
->attrs
[i
].form
)
10656 case DW_FORM_ref_addr
:
10658 fprintf_unfiltered (f
, "address: ");
10659 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10661 case DW_FORM_block2
:
10662 case DW_FORM_block4
:
10663 case DW_FORM_block
:
10664 case DW_FORM_block1
:
10665 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10667 case DW_FORM_exprloc
:
10668 fprintf_unfiltered (f
, "expression: size %u",
10669 DW_BLOCK (&die
->attrs
[i
])->size
);
10674 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10675 (long) (DW_ADDR (&die
->attrs
[i
])));
10677 case DW_FORM_data1
:
10678 case DW_FORM_data2
:
10679 case DW_FORM_data4
:
10680 case DW_FORM_data8
:
10681 case DW_FORM_udata
:
10682 case DW_FORM_sdata
:
10683 fprintf_unfiltered (f
, "constant: %s",
10684 pulongest (DW_UNSND (&die
->attrs
[i
])));
10686 case DW_FORM_sec_offset
:
10687 fprintf_unfiltered (f
, "section offset: %s",
10688 pulongest (DW_UNSND (&die
->attrs
[i
])));
10691 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10692 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10693 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10695 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10697 case DW_FORM_string
:
10699 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10700 DW_STRING (&die
->attrs
[i
])
10701 ? DW_STRING (&die
->attrs
[i
]) : "",
10702 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10705 if (DW_UNSND (&die
->attrs
[i
]))
10706 fprintf_unfiltered (f
, "flag: TRUE");
10708 fprintf_unfiltered (f
, "flag: FALSE");
10710 case DW_FORM_flag_present
:
10711 fprintf_unfiltered (f
, "flag: TRUE");
10713 case DW_FORM_indirect
:
10714 /* the reader will have reduced the indirect form to
10715 the "base form" so this form should not occur */
10716 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10719 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10720 die
->attrs
[i
].form
);
10723 fprintf_unfiltered (f
, "\n");
10728 dump_die_for_error (struct die_info
*die
)
10730 dump_die_shallow (gdb_stderr
, 0, die
);
10734 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10736 int indent
= level
* 4;
10738 gdb_assert (die
!= NULL
);
10740 if (level
>= max_level
)
10743 dump_die_shallow (f
, indent
, die
);
10745 if (die
->child
!= NULL
)
10747 print_spaces (indent
, f
);
10748 fprintf_unfiltered (f
, " Children:");
10749 if (level
+ 1 < max_level
)
10751 fprintf_unfiltered (f
, "\n");
10752 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10756 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10760 if (die
->sibling
!= NULL
&& level
> 0)
10762 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10766 /* This is called from the pdie macro in gdbinit.in.
10767 It's not static so gcc will keep a copy callable from gdb. */
10770 dump_die (struct die_info
*die
, int max_level
)
10772 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10776 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10780 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10786 is_ref_attr (struct attribute
*attr
)
10788 switch (attr
->form
)
10790 case DW_FORM_ref_addr
:
10795 case DW_FORM_ref_udata
:
10802 static unsigned int
10803 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10805 if (is_ref_attr (attr
))
10806 return DW_ADDR (attr
);
10808 complaint (&symfile_complaints
,
10809 _("unsupported die ref attribute form: '%s'"),
10810 dwarf_form_name (attr
->form
));
10814 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10815 * the value held by the attribute is not constant. */
10818 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10820 if (attr
->form
== DW_FORM_sdata
)
10821 return DW_SND (attr
);
10822 else if (attr
->form
== DW_FORM_udata
10823 || attr
->form
== DW_FORM_data1
10824 || attr
->form
== DW_FORM_data2
10825 || attr
->form
== DW_FORM_data4
10826 || attr
->form
== DW_FORM_data8
)
10827 return DW_UNSND (attr
);
10830 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10831 dwarf_form_name (attr
->form
));
10832 return default_value
;
10836 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10837 unit and add it to our queue.
10838 The result is non-zero if PER_CU was queued, otherwise the result is zero
10839 meaning either PER_CU is already queued or it is already loaded. */
10842 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10843 struct dwarf2_per_cu_data
*per_cu
)
10845 /* Mark the dependence relation so that we don't flush PER_CU
10847 dwarf2_add_dependence (this_cu
, per_cu
);
10849 /* If it's already on the queue, we have nothing to do. */
10850 if (per_cu
->queued
)
10853 /* If the compilation unit is already loaded, just mark it as
10855 if (per_cu
->cu
!= NULL
)
10857 per_cu
->cu
->last_used
= 0;
10861 /* Add it to the queue. */
10862 queue_comp_unit (per_cu
, this_cu
->objfile
);
10867 /* Follow reference or signature attribute ATTR of SRC_DIE.
10868 On entry *REF_CU is the CU of SRC_DIE.
10869 On exit *REF_CU is the CU of the result. */
10871 static struct die_info
*
10872 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10873 struct dwarf2_cu
**ref_cu
)
10875 struct die_info
*die
;
10877 if (is_ref_attr (attr
))
10878 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10879 else if (attr
->form
== DW_FORM_sig8
)
10880 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10883 dump_die_for_error (src_die
);
10884 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10885 (*ref_cu
)->objfile
->name
);
10891 /* Follow reference OFFSET.
10892 On entry *REF_CU is the CU of source DIE referencing OFFSET.
10893 On exit *REF_CU is the CU of the result. */
10895 static struct die_info
*
10896 follow_die_offset (unsigned int offset
, struct dwarf2_cu
**ref_cu
)
10898 struct die_info temp_die
;
10899 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10901 gdb_assert (cu
->per_cu
!= NULL
);
10903 if (cu
->per_cu
->from_debug_types
)
10905 /* .debug_types CUs cannot reference anything outside their CU.
10906 If they need to, they have to reference a signatured type via
10908 if (! offset_in_cu_p (&cu
->header
, offset
))
10912 else if (! offset_in_cu_p (&cu
->header
, offset
))
10914 struct dwarf2_per_cu_data
*per_cu
;
10916 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10918 /* If necessary, add it to the queue and load its DIEs. */
10919 if (maybe_queue_comp_unit (cu
, per_cu
))
10920 load_full_comp_unit (per_cu
, cu
->objfile
);
10922 target_cu
= per_cu
->cu
;
10927 *ref_cu
= target_cu
;
10928 temp_die
.offset
= offset
;
10929 return htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10932 /* Follow reference attribute ATTR of SRC_DIE.
10933 On entry *REF_CU is the CU of SRC_DIE.
10934 On exit *REF_CU is the CU of the result. */
10936 static struct die_info
*
10937 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10938 struct dwarf2_cu
**ref_cu
)
10940 unsigned int offset
= dwarf2_get_ref_die_offset (attr
);
10941 struct dwarf2_cu
*cu
= *ref_cu
;
10942 struct die_info
*die
;
10944 die
= follow_die_offset (offset
, ref_cu
);
10946 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10947 "at 0x%x [in module %s]"),
10948 offset
, src_die
->offset
, cu
->objfile
->name
);
10953 /* Return DWARF block and its CU referenced by OFFSET at PER_CU. Returned
10954 value is intended for DW_OP_call*. */
10956 struct dwarf2_locexpr_baton
10957 dwarf2_fetch_die_location_block (unsigned int offset
,
10958 struct dwarf2_per_cu_data
*per_cu
)
10960 struct dwarf2_cu
*cu
= per_cu
->cu
;
10961 struct die_info
*die
;
10962 struct attribute
*attr
;
10963 struct dwarf2_locexpr_baton retval
;
10965 die
= follow_die_offset (offset
, &cu
);
10967 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced in module %s"),
10968 offset
, per_cu
->cu
->objfile
->name
);
10970 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
10973 /* DWARF: "If there is no such attribute, then there is no effect.". */
10975 retval
.data
= NULL
;
10980 if (!attr_form_is_block (attr
))
10981 error (_("Dwarf Error: DIE at 0x%x referenced in module %s "
10982 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
10983 offset
, per_cu
->cu
->objfile
->name
);
10985 retval
.data
= DW_BLOCK (attr
)->data
;
10986 retval
.size
= DW_BLOCK (attr
)->size
;
10988 retval
.per_cu
= cu
->per_cu
;
10992 /* Follow the signature attribute ATTR in SRC_DIE.
10993 On entry *REF_CU is the CU of SRC_DIE.
10994 On exit *REF_CU is the CU of the result. */
10996 static struct die_info
*
10997 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10998 struct dwarf2_cu
**ref_cu
)
11000 struct objfile
*objfile
= (*ref_cu
)->objfile
;
11001 struct die_info temp_die
;
11002 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
11003 struct dwarf2_cu
*sig_cu
;
11004 struct die_info
*die
;
11006 /* sig_type will be NULL if the signatured type is missing from
11008 if (sig_type
== NULL
)
11009 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
11010 "at 0x%x [in module %s]"),
11011 src_die
->offset
, objfile
->name
);
11013 /* If necessary, add it to the queue and load its DIEs. */
11015 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
11016 read_signatured_type (objfile
, sig_type
);
11018 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
11020 sig_cu
= sig_type
->per_cu
.cu
;
11021 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
11022 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
11029 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
11030 "at 0x%x [in module %s]"),
11031 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
11034 /* Given an offset of a signatured type, return its signatured_type. */
11036 static struct signatured_type
*
11037 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
11039 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
11040 unsigned int length
, initial_length_size
;
11041 unsigned int sig_offset
;
11042 struct signatured_type find_entry
, *type_sig
;
11044 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
11045 sig_offset
= (initial_length_size
11047 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
11048 + 1 /*address_size*/);
11049 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
11050 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
11052 /* This is only used to lookup previously recorded types.
11053 If we didn't find it, it's our bug. */
11054 gdb_assert (type_sig
!= NULL
);
11055 gdb_assert (offset
== type_sig
->offset
);
11060 /* Read in signatured type at OFFSET and build its CU and die(s). */
11063 read_signatured_type_at_offset (struct objfile
*objfile
,
11064 unsigned int offset
)
11066 struct signatured_type
*type_sig
;
11068 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
11070 /* We have the section offset, but we need the signature to do the
11071 hash table lookup. */
11072 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
11074 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
11076 read_signatured_type (objfile
, type_sig
);
11078 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
11081 /* Read in a signatured type and build its CU and DIEs. */
11084 read_signatured_type (struct objfile
*objfile
,
11085 struct signatured_type
*type_sig
)
11087 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
11088 struct die_reader_specs reader_specs
;
11089 struct dwarf2_cu
*cu
;
11090 ULONGEST signature
;
11091 struct cleanup
*back_to
, *free_cu_cleanup
;
11092 struct attribute
*attr
;
11094 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
11096 cu
= xmalloc (sizeof (struct dwarf2_cu
));
11097 memset (cu
, 0, sizeof (struct dwarf2_cu
));
11098 obstack_init (&cu
->comp_unit_obstack
);
11099 cu
->objfile
= objfile
;
11100 type_sig
->per_cu
.cu
= cu
;
11101 cu
->per_cu
= &type_sig
->per_cu
;
11103 /* If an error occurs while loading, release our storage. */
11104 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
11106 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
11107 types_ptr
, objfile
->obfd
);
11108 gdb_assert (signature
== type_sig
->signature
);
11111 = htab_create_alloc_ex (cu
->header
.length
/ 12,
11115 &cu
->comp_unit_obstack
,
11116 hashtab_obstack_allocate
,
11117 dummy_obstack_deallocate
);
11119 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
11120 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
11122 init_cu_die_reader (&reader_specs
, cu
);
11124 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
11127 /* We try not to read any attributes in this function, because not
11128 all objfiles needed for references have been loaded yet, and symbol
11129 table processing isn't initialized. But we have to set the CU language,
11130 or we won't be able to build types correctly. */
11131 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
11133 set_cu_language (DW_UNSND (attr
), cu
);
11135 set_cu_language (language_minimal
, cu
);
11137 do_cleanups (back_to
);
11139 /* We've successfully allocated this compilation unit. Let our caller
11140 clean it up when finished with it. */
11141 discard_cleanups (free_cu_cleanup
);
11143 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
11144 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
11147 /* Decode simple location descriptions.
11148 Given a pointer to a dwarf block that defines a location, compute
11149 the location and return the value.
11151 NOTE drow/2003-11-18: This function is called in two situations
11152 now: for the address of static or global variables (partial symbols
11153 only) and for offsets into structures which are expected to be
11154 (more or less) constant. The partial symbol case should go away,
11155 and only the constant case should remain. That will let this
11156 function complain more accurately. A few special modes are allowed
11157 without complaint for global variables (for instance, global
11158 register values and thread-local values).
11160 A location description containing no operations indicates that the
11161 object is optimized out. The return value is 0 for that case.
11162 FIXME drow/2003-11-16: No callers check for this case any more; soon all
11163 callers will only want a very basic result and this can become a
11166 Note that stack[0] is unused except as a default error return.
11167 Note that stack overflow is not yet handled. */
11170 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
11172 struct objfile
*objfile
= cu
->objfile
;
11174 int size
= blk
->size
;
11175 gdb_byte
*data
= blk
->data
;
11176 CORE_ADDR stack
[64];
11178 unsigned int bytes_read
, unsnd
;
11222 stack
[++stacki
] = op
- DW_OP_lit0
;
11257 stack
[++stacki
] = op
- DW_OP_reg0
;
11259 dwarf2_complex_location_expr_complaint ();
11263 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
11265 stack
[++stacki
] = unsnd
;
11267 dwarf2_complex_location_expr_complaint ();
11271 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
11276 case DW_OP_const1u
:
11277 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
11281 case DW_OP_const1s
:
11282 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
11286 case DW_OP_const2u
:
11287 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
11291 case DW_OP_const2s
:
11292 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
11296 case DW_OP_const4u
:
11297 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
11301 case DW_OP_const4s
:
11302 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
11307 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
11313 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
11318 stack
[stacki
+ 1] = stack
[stacki
];
11323 stack
[stacki
- 1] += stack
[stacki
];
11327 case DW_OP_plus_uconst
:
11328 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
11333 stack
[stacki
- 1] -= stack
[stacki
];
11338 /* If we're not the last op, then we definitely can't encode
11339 this using GDB's address_class enum. This is valid for partial
11340 global symbols, although the variable's address will be bogus
11343 dwarf2_complex_location_expr_complaint ();
11346 case DW_OP_GNU_push_tls_address
:
11347 /* The top of the stack has the offset from the beginning
11348 of the thread control block at which the variable is located. */
11349 /* Nothing should follow this operator, so the top of stack would
11351 /* This is valid for partial global symbols, but the variable's
11352 address will be bogus in the psymtab. */
11354 dwarf2_complex_location_expr_complaint ();
11357 case DW_OP_GNU_uninit
:
11361 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
11362 dwarf_stack_op_name (op
, 1));
11363 return (stack
[stacki
]);
11366 return (stack
[stacki
]);
11369 /* memory allocation interface */
11371 static struct dwarf_block
*
11372 dwarf_alloc_block (struct dwarf2_cu
*cu
)
11374 struct dwarf_block
*blk
;
11376 blk
= (struct dwarf_block
*)
11377 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
11381 static struct abbrev_info
*
11382 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
11384 struct abbrev_info
*abbrev
;
11386 abbrev
= (struct abbrev_info
*)
11387 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
11388 memset (abbrev
, 0, sizeof (struct abbrev_info
));
11392 static struct die_info
*
11393 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
11395 struct die_info
*die
;
11396 size_t size
= sizeof (struct die_info
);
11399 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
11401 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
11402 memset (die
, 0, sizeof (struct die_info
));
11407 /* Macro support. */
11410 /* Return the full name of file number I in *LH's file name table.
11411 Use COMP_DIR as the name of the current directory of the
11412 compilation. The result is allocated using xmalloc; the caller is
11413 responsible for freeing it. */
11415 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
11417 /* Is the file number a valid index into the line header's file name
11418 table? Remember that file numbers start with one, not zero. */
11419 if (1 <= file
&& file
<= lh
->num_file_names
)
11421 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
11423 if (IS_ABSOLUTE_PATH (fe
->name
))
11424 return xstrdup (fe
->name
);
11432 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11438 dir_len
= strlen (dir
);
11439 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
11440 strcpy (full_name
, dir
);
11441 full_name
[dir_len
] = '/';
11442 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
11446 return xstrdup (fe
->name
);
11451 /* The compiler produced a bogus file number. We can at least
11452 record the macro definitions made in the file, even if we
11453 won't be able to find the file by name. */
11454 char fake_name
[80];
11456 sprintf (fake_name
, "<bad macro file number %d>", file
);
11458 complaint (&symfile_complaints
,
11459 _("bad file number in macro information (%d)"),
11462 return xstrdup (fake_name
);
11467 static struct macro_source_file
*
11468 macro_start_file (int file
, int line
,
11469 struct macro_source_file
*current_file
,
11470 const char *comp_dir
,
11471 struct line_header
*lh
, struct objfile
*objfile
)
11473 /* The full name of this source file. */
11474 char *full_name
= file_full_name (file
, lh
, comp_dir
);
11476 /* We don't create a macro table for this compilation unit
11477 at all until we actually get a filename. */
11478 if (! pending_macros
)
11479 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
11480 objfile
->macro_cache
);
11482 if (! current_file
)
11483 /* If we have no current file, then this must be the start_file
11484 directive for the compilation unit's main source file. */
11485 current_file
= macro_set_main (pending_macros
, full_name
);
11487 current_file
= macro_include (current_file
, line
, full_name
);
11491 return current_file
;
11495 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
11496 followed by a null byte. */
11498 copy_string (const char *buf
, int len
)
11500 char *s
= xmalloc (len
+ 1);
11502 memcpy (s
, buf
, len
);
11508 static const char *
11509 consume_improper_spaces (const char *p
, const char *body
)
11513 complaint (&symfile_complaints
,
11514 _("macro definition contains spaces in formal argument list:\n`%s'"),
11526 parse_macro_definition (struct macro_source_file
*file
, int line
,
11531 /* The body string takes one of two forms. For object-like macro
11532 definitions, it should be:
11534 <macro name> " " <definition>
11536 For function-like macro definitions, it should be:
11538 <macro name> "() " <definition>
11540 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
11542 Spaces may appear only where explicitly indicated, and in the
11545 The Dwarf 2 spec says that an object-like macro's name is always
11546 followed by a space, but versions of GCC around March 2002 omit
11547 the space when the macro's definition is the empty string.
11549 The Dwarf 2 spec says that there should be no spaces between the
11550 formal arguments in a function-like macro's formal argument list,
11551 but versions of GCC around March 2002 include spaces after the
11555 /* Find the extent of the macro name. The macro name is terminated
11556 by either a space or null character (for an object-like macro) or
11557 an opening paren (for a function-like macro). */
11558 for (p
= body
; *p
; p
++)
11559 if (*p
== ' ' || *p
== '(')
11562 if (*p
== ' ' || *p
== '\0')
11564 /* It's an object-like macro. */
11565 int name_len
= p
- body
;
11566 char *name
= copy_string (body
, name_len
);
11567 const char *replacement
;
11570 replacement
= body
+ name_len
+ 1;
11573 dwarf2_macro_malformed_definition_complaint (body
);
11574 replacement
= body
+ name_len
;
11577 macro_define_object (file
, line
, name
, replacement
);
11581 else if (*p
== '(')
11583 /* It's a function-like macro. */
11584 char *name
= copy_string (body
, p
- body
);
11587 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
11591 p
= consume_improper_spaces (p
, body
);
11593 /* Parse the formal argument list. */
11594 while (*p
&& *p
!= ')')
11596 /* Find the extent of the current argument name. */
11597 const char *arg_start
= p
;
11599 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
11602 if (! *p
|| p
== arg_start
)
11603 dwarf2_macro_malformed_definition_complaint (body
);
11606 /* Make sure argv has room for the new argument. */
11607 if (argc
>= argv_size
)
11610 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
11613 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
11616 p
= consume_improper_spaces (p
, body
);
11618 /* Consume the comma, if present. */
11623 p
= consume_improper_spaces (p
, body
);
11632 /* Perfectly formed definition, no complaints. */
11633 macro_define_function (file
, line
, name
,
11634 argc
, (const char **) argv
,
11636 else if (*p
== '\0')
11638 /* Complain, but do define it. */
11639 dwarf2_macro_malformed_definition_complaint (body
);
11640 macro_define_function (file
, line
, name
,
11641 argc
, (const char **) argv
,
11645 /* Just complain. */
11646 dwarf2_macro_malformed_definition_complaint (body
);
11649 /* Just complain. */
11650 dwarf2_macro_malformed_definition_complaint (body
);
11656 for (i
= 0; i
< argc
; i
++)
11662 dwarf2_macro_malformed_definition_complaint (body
);
11667 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11668 char *comp_dir
, bfd
*abfd
,
11669 struct dwarf2_cu
*cu
)
11671 gdb_byte
*mac_ptr
, *mac_end
;
11672 struct macro_source_file
*current_file
= 0;
11673 enum dwarf_macinfo_record_type macinfo_type
;
11674 int at_commandline
;
11676 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11677 &dwarf2_per_objfile
->macinfo
);
11678 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11680 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11684 /* First pass: Find the name of the base filename.
11685 This filename is needed in order to process all macros whose definition
11686 (or undefinition) comes from the command line. These macros are defined
11687 before the first DW_MACINFO_start_file entry, and yet still need to be
11688 associated to the base file.
11690 To determine the base file name, we scan the macro definitions until we
11691 reach the first DW_MACINFO_start_file entry. We then initialize
11692 CURRENT_FILE accordingly so that any macro definition found before the
11693 first DW_MACINFO_start_file can still be associated to the base file. */
11695 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11696 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11697 + dwarf2_per_objfile
->macinfo
.size
;
11701 /* Do we at least have room for a macinfo type byte? */
11702 if (mac_ptr
>= mac_end
)
11704 /* Complaint is printed during the second pass as GDB will probably
11705 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11709 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11712 switch (macinfo_type
)
11714 /* A zero macinfo type indicates the end of the macro
11719 case DW_MACINFO_define
:
11720 case DW_MACINFO_undef
:
11721 /* Only skip the data by MAC_PTR. */
11723 unsigned int bytes_read
;
11725 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11726 mac_ptr
+= bytes_read
;
11727 read_string (abfd
, mac_ptr
, &bytes_read
);
11728 mac_ptr
+= bytes_read
;
11732 case DW_MACINFO_start_file
:
11734 unsigned int bytes_read
;
11737 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11738 mac_ptr
+= bytes_read
;
11739 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11740 mac_ptr
+= bytes_read
;
11742 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11747 case DW_MACINFO_end_file
:
11748 /* No data to skip by MAC_PTR. */
11751 case DW_MACINFO_vendor_ext
:
11752 /* Only skip the data by MAC_PTR. */
11754 unsigned int bytes_read
;
11756 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11757 mac_ptr
+= bytes_read
;
11758 read_string (abfd
, mac_ptr
, &bytes_read
);
11759 mac_ptr
+= bytes_read
;
11766 } while (macinfo_type
!= 0 && current_file
== NULL
);
11768 /* Second pass: Process all entries.
11770 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11771 command-line macro definitions/undefinitions. This flag is unset when we
11772 reach the first DW_MACINFO_start_file entry. */
11774 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11776 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11777 GDB is still reading the definitions from command line. First
11778 DW_MACINFO_start_file will need to be ignored as it was already executed
11779 to create CURRENT_FILE for the main source holding also the command line
11780 definitions. On first met DW_MACINFO_start_file this flag is reset to
11781 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11783 at_commandline
= 1;
11787 /* Do we at least have room for a macinfo type byte? */
11788 if (mac_ptr
>= mac_end
)
11790 dwarf2_macros_too_long_complaint ();
11794 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11797 switch (macinfo_type
)
11799 /* A zero macinfo type indicates the end of the macro
11804 case DW_MACINFO_define
:
11805 case DW_MACINFO_undef
:
11807 unsigned int bytes_read
;
11811 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11812 mac_ptr
+= bytes_read
;
11813 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11814 mac_ptr
+= bytes_read
;
11816 if (! current_file
)
11818 /* DWARF violation as no main source is present. */
11819 complaint (&symfile_complaints
,
11820 _("debug info with no main source gives macro %s "
11822 macinfo_type
== DW_MACINFO_define
?
11824 macinfo_type
== DW_MACINFO_undef
?
11825 _("undefinition") :
11826 _("something-or-other"), line
, body
);
11829 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11830 complaint (&symfile_complaints
,
11831 _("debug info gives %s macro %s with %s line %d: %s"),
11832 at_commandline
? _("command-line") : _("in-file"),
11833 macinfo_type
== DW_MACINFO_define
?
11835 macinfo_type
== DW_MACINFO_undef
?
11836 _("undefinition") :
11837 _("something-or-other"),
11838 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11840 if (macinfo_type
== DW_MACINFO_define
)
11841 parse_macro_definition (current_file
, line
, body
);
11842 else if (macinfo_type
== DW_MACINFO_undef
)
11843 macro_undef (current_file
, line
, body
);
11847 case DW_MACINFO_start_file
:
11849 unsigned int bytes_read
;
11852 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11853 mac_ptr
+= bytes_read
;
11854 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11855 mac_ptr
+= bytes_read
;
11857 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11858 complaint (&symfile_complaints
,
11859 _("debug info gives source %d included "
11860 "from %s at %s line %d"),
11861 file
, at_commandline
? _("command-line") : _("file"),
11862 line
== 0 ? _("zero") : _("non-zero"), line
);
11864 if (at_commandline
)
11866 /* This DW_MACINFO_start_file was executed in the pass one. */
11867 at_commandline
= 0;
11870 current_file
= macro_start_file (file
, line
,
11871 current_file
, comp_dir
,
11876 case DW_MACINFO_end_file
:
11877 if (! current_file
)
11878 complaint (&symfile_complaints
,
11879 _("macro debug info has an unmatched `close_file' directive"));
11882 current_file
= current_file
->included_by
;
11883 if (! current_file
)
11885 enum dwarf_macinfo_record_type next_type
;
11887 /* GCC circa March 2002 doesn't produce the zero
11888 type byte marking the end of the compilation
11889 unit. Complain if it's not there, but exit no
11892 /* Do we at least have room for a macinfo type byte? */
11893 if (mac_ptr
>= mac_end
)
11895 dwarf2_macros_too_long_complaint ();
11899 /* We don't increment mac_ptr here, so this is just
11901 next_type
= read_1_byte (abfd
, mac_ptr
);
11902 if (next_type
!= 0)
11903 complaint (&symfile_complaints
,
11904 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11911 case DW_MACINFO_vendor_ext
:
11913 unsigned int bytes_read
;
11917 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11918 mac_ptr
+= bytes_read
;
11919 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11920 mac_ptr
+= bytes_read
;
11922 /* We don't recognize any vendor extensions. */
11926 } while (macinfo_type
!= 0);
11929 /* Check if the attribute's form is a DW_FORM_block*
11930 if so return true else false. */
11932 attr_form_is_block (struct attribute
*attr
)
11934 return (attr
== NULL
? 0 :
11935 attr
->form
== DW_FORM_block1
11936 || attr
->form
== DW_FORM_block2
11937 || attr
->form
== DW_FORM_block4
11938 || attr
->form
== DW_FORM_block
11939 || attr
->form
== DW_FORM_exprloc
);
11942 /* Return non-zero if ATTR's value is a section offset --- classes
11943 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11944 You may use DW_UNSND (attr) to retrieve such offsets.
11946 Section 7.5.4, "Attribute Encodings", explains that no attribute
11947 may have a value that belongs to more than one of these classes; it
11948 would be ambiguous if we did, because we use the same forms for all
11951 attr_form_is_section_offset (struct attribute
*attr
)
11953 return (attr
->form
== DW_FORM_data4
11954 || attr
->form
== DW_FORM_data8
11955 || attr
->form
== DW_FORM_sec_offset
);
11959 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11960 zero otherwise. When this function returns true, you can apply
11961 dwarf2_get_attr_constant_value to it.
11963 However, note that for some attributes you must check
11964 attr_form_is_section_offset before using this test. DW_FORM_data4
11965 and DW_FORM_data8 are members of both the constant class, and of
11966 the classes that contain offsets into other debug sections
11967 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11968 that, if an attribute's can be either a constant or one of the
11969 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11970 taken as section offsets, not constants. */
11972 attr_form_is_constant (struct attribute
*attr
)
11974 switch (attr
->form
)
11976 case DW_FORM_sdata
:
11977 case DW_FORM_udata
:
11978 case DW_FORM_data1
:
11979 case DW_FORM_data2
:
11980 case DW_FORM_data4
:
11981 case DW_FORM_data8
:
11989 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11990 struct dwarf2_cu
*cu
)
11992 if (attr_form_is_section_offset (attr
)
11993 /* ".debug_loc" may not exist at all, or the offset may be outside
11994 the section. If so, fall through to the complaint in the
11996 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11998 struct dwarf2_loclist_baton
*baton
;
12000 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
12001 sizeof (struct dwarf2_loclist_baton
));
12002 baton
->per_cu
= cu
->per_cu
;
12003 gdb_assert (baton
->per_cu
);
12005 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
12006 &dwarf2_per_objfile
->loc
);
12008 /* We don't know how long the location list is, but make sure we
12009 don't run off the edge of the section. */
12010 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
12011 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
12012 baton
->base_address
= cu
->base_address
;
12013 if (cu
->base_known
== 0)
12014 complaint (&symfile_complaints
,
12015 _("Location list used without specifying the CU base address."));
12017 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
12018 SYMBOL_LOCATION_BATON (sym
) = baton
;
12022 struct dwarf2_locexpr_baton
*baton
;
12024 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
12025 sizeof (struct dwarf2_locexpr_baton
));
12026 baton
->per_cu
= cu
->per_cu
;
12027 gdb_assert (baton
->per_cu
);
12029 if (attr_form_is_block (attr
))
12031 /* Note that we're just copying the block's data pointer
12032 here, not the actual data. We're still pointing into the
12033 info_buffer for SYM's objfile; right now we never release
12034 that buffer, but when we do clean up properly this may
12036 baton
->size
= DW_BLOCK (attr
)->size
;
12037 baton
->data
= DW_BLOCK (attr
)->data
;
12041 dwarf2_invalid_attrib_class_complaint ("location description",
12042 SYMBOL_NATURAL_NAME (sym
));
12044 baton
->data
= NULL
;
12047 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
12048 SYMBOL_LOCATION_BATON (sym
) = baton
;
12052 /* Return the OBJFILE associated with the compilation unit CU. If CU
12053 came from a separate debuginfo file, then the master objfile is
12057 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
12059 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
12061 /* Return the master objfile, so that we can report and look up the
12062 correct file containing this variable. */
12063 if (objfile
->separate_debug_objfile_backlink
)
12064 objfile
= objfile
->separate_debug_objfile_backlink
;
12069 /* Return the address size given in the compilation unit header for CU. */
12072 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
12075 return per_cu
->cu
->header
.addr_size
;
12078 /* If the CU is not currently read in, we re-read its header. */
12079 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
12080 struct dwarf2_per_objfile
*per_objfile
12081 = objfile_data (objfile
, dwarf2_objfile_data_key
);
12082 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
12083 struct comp_unit_head cu_header
;
12085 memset (&cu_header
, 0, sizeof cu_header
);
12086 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
12087 return cu_header
.addr_size
;
12091 /* Return the offset size given in the compilation unit header for CU. */
12094 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
12097 return per_cu
->cu
->header
.offset_size
;
12100 /* If the CU is not currently read in, we re-read its header. */
12101 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
12102 struct dwarf2_per_objfile
*per_objfile
12103 = objfile_data (objfile
, dwarf2_objfile_data_key
);
12104 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
12105 struct comp_unit_head cu_header
;
12107 memset (&cu_header
, 0, sizeof cu_header
);
12108 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
12109 return cu_header
.offset_size
;
12113 /* Return the text offset of the CU. The returned offset comes from
12114 this CU's objfile. If this objfile came from a separate debuginfo
12115 file, then the offset may be different from the corresponding
12116 offset in the parent objfile. */
12119 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
12121 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
12123 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
12126 /* Locate the .debug_info compilation unit from CU's objfile which contains
12127 the DIE at OFFSET. Raises an error on failure. */
12129 static struct dwarf2_per_cu_data
*
12130 dwarf2_find_containing_comp_unit (unsigned int offset
,
12131 struct objfile
*objfile
)
12133 struct dwarf2_per_cu_data
*this_cu
;
12137 high
= dwarf2_per_objfile
->n_comp_units
- 1;
12140 int mid
= low
+ (high
- low
) / 2;
12142 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
12147 gdb_assert (low
== high
);
12148 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
12151 error (_("Dwarf Error: could not find partial DIE containing "
12152 "offset 0x%lx [in module %s]"),
12153 (long) offset
, bfd_get_filename (objfile
->obfd
));
12155 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
12156 return dwarf2_per_objfile
->all_comp_units
[low
-1];
12160 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
12161 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
12162 && offset
>= this_cu
->offset
+ this_cu
->length
)
12163 error (_("invalid dwarf2 offset %u"), offset
);
12164 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
12169 /* Locate the compilation unit from OBJFILE which is located at exactly
12170 OFFSET. Raises an error on failure. */
12172 static struct dwarf2_per_cu_data
*
12173 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
12175 struct dwarf2_per_cu_data
*this_cu
;
12177 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
12178 if (this_cu
->offset
!= offset
)
12179 error (_("no compilation unit with offset %u."), offset
);
12183 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
12185 static struct dwarf2_cu
*
12186 alloc_one_comp_unit (struct objfile
*objfile
)
12188 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
12189 cu
->objfile
= objfile
;
12190 obstack_init (&cu
->comp_unit_obstack
);
12194 /* Release one cached compilation unit, CU. We unlink it from the tree
12195 of compilation units, but we don't remove it from the read_in_chain;
12196 the caller is responsible for that.
12197 NOTE: DATA is a void * because this function is also used as a
12198 cleanup routine. */
12201 free_one_comp_unit (void *data
)
12203 struct dwarf2_cu
*cu
= data
;
12205 if (cu
->per_cu
!= NULL
)
12206 cu
->per_cu
->cu
= NULL
;
12209 obstack_free (&cu
->comp_unit_obstack
, NULL
);
12214 /* This cleanup function is passed the address of a dwarf2_cu on the stack
12215 when we're finished with it. We can't free the pointer itself, but be
12216 sure to unlink it from the cache. Also release any associated storage
12217 and perform cache maintenance.
12219 Only used during partial symbol parsing. */
12222 free_stack_comp_unit (void *data
)
12224 struct dwarf2_cu
*cu
= data
;
12226 obstack_free (&cu
->comp_unit_obstack
, NULL
);
12227 cu
->partial_dies
= NULL
;
12229 if (cu
->per_cu
!= NULL
)
12231 /* This compilation unit is on the stack in our caller, so we
12232 should not xfree it. Just unlink it. */
12233 cu
->per_cu
->cu
= NULL
;
12236 /* If we had a per-cu pointer, then we may have other compilation
12237 units loaded, so age them now. */
12238 age_cached_comp_units ();
12242 /* Free all cached compilation units. */
12245 free_cached_comp_units (void *data
)
12247 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
12249 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12250 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
12251 while (per_cu
!= NULL
)
12253 struct dwarf2_per_cu_data
*next_cu
;
12255 next_cu
= per_cu
->cu
->read_in_chain
;
12257 free_one_comp_unit (per_cu
->cu
);
12258 *last_chain
= next_cu
;
12264 /* Increase the age counter on each cached compilation unit, and free
12265 any that are too old. */
12268 age_cached_comp_units (void)
12270 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
12272 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
12273 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12274 while (per_cu
!= NULL
)
12276 per_cu
->cu
->last_used
++;
12277 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
12278 dwarf2_mark (per_cu
->cu
);
12279 per_cu
= per_cu
->cu
->read_in_chain
;
12282 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12283 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
12284 while (per_cu
!= NULL
)
12286 struct dwarf2_per_cu_data
*next_cu
;
12288 next_cu
= per_cu
->cu
->read_in_chain
;
12290 if (!per_cu
->cu
->mark
)
12292 free_one_comp_unit (per_cu
->cu
);
12293 *last_chain
= next_cu
;
12296 last_chain
= &per_cu
->cu
->read_in_chain
;
12302 /* Remove a single compilation unit from the cache. */
12305 free_one_cached_comp_unit (void *target_cu
)
12307 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
12309 per_cu
= dwarf2_per_objfile
->read_in_chain
;
12310 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
12311 while (per_cu
!= NULL
)
12313 struct dwarf2_per_cu_data
*next_cu
;
12315 next_cu
= per_cu
->cu
->read_in_chain
;
12317 if (per_cu
->cu
== target_cu
)
12319 free_one_comp_unit (per_cu
->cu
);
12320 *last_chain
= next_cu
;
12324 last_chain
= &per_cu
->cu
->read_in_chain
;
12330 /* Release all extra memory associated with OBJFILE. */
12333 dwarf2_free_objfile (struct objfile
*objfile
)
12335 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
12337 if (dwarf2_per_objfile
== NULL
)
12340 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
12341 free_cached_comp_units (NULL
);
12343 /* Everything else should be on the objfile obstack. */
12346 /* A pair of DIE offset and GDB type pointer. We store these
12347 in a hash table separate from the DIEs, and preserve them
12348 when the DIEs are flushed out of cache. */
12350 struct dwarf2_offset_and_type
12352 unsigned int offset
;
12356 /* Hash function for a dwarf2_offset_and_type. */
12359 offset_and_type_hash (const void *item
)
12361 const struct dwarf2_offset_and_type
*ofs
= item
;
12363 return ofs
->offset
;
12366 /* Equality function for a dwarf2_offset_and_type. */
12369 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
12371 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
12372 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
12374 return ofs_lhs
->offset
== ofs_rhs
->offset
;
12377 /* Set the type associated with DIE to TYPE. Save it in CU's hash
12378 table if necessary. For convenience, return TYPE.
12380 The DIEs reading must have careful ordering to:
12381 * Not cause infite loops trying to read in DIEs as a prerequisite for
12382 reading current DIE.
12383 * Not trying to dereference contents of still incompletely read in types
12384 while reading in other DIEs.
12385 * Enable referencing still incompletely read in types just by a pointer to
12386 the type without accessing its fields.
12388 Therefore caller should follow these rules:
12389 * Try to fetch any prerequisite types we may need to build this DIE type
12390 before building the type and calling set_die_type.
12391 * After building typer call set_die_type for current DIE as soon as
12392 possible before fetching more types to complete the current type.
12393 * Make the type as complete as possible before fetching more types. */
12395 static struct type
*
12396 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
12398 struct dwarf2_offset_and_type
**slot
, ofs
;
12400 /* For Ada types, make sure that the gnat-specific data is always
12401 initialized (if not already set). There are a few types where
12402 we should not be doing so, because the type-specific area is
12403 already used to hold some other piece of info (eg: TYPE_CODE_FLT
12404 where the type-specific area is used to store the floatformat).
12405 But this is not a problem, because the gnat-specific information
12406 is actually not needed for these types. */
12407 if (need_gnat_info (cu
)
12408 && TYPE_CODE (type
) != TYPE_CODE_FUNC
12409 && TYPE_CODE (type
) != TYPE_CODE_FLT
12410 && !HAVE_GNAT_AUX_INFO (type
))
12411 INIT_GNAT_SPECIFIC (type
);
12413 if (cu
->type_hash
== NULL
)
12415 gdb_assert (cu
->per_cu
!= NULL
);
12416 cu
->per_cu
->type_hash
12417 = htab_create_alloc_ex (cu
->header
.length
/ 24,
12418 offset_and_type_hash
,
12419 offset_and_type_eq
,
12421 &cu
->objfile
->objfile_obstack
,
12422 hashtab_obstack_allocate
,
12423 dummy_obstack_deallocate
);
12424 cu
->type_hash
= cu
->per_cu
->type_hash
;
12427 ofs
.offset
= die
->offset
;
12429 slot
= (struct dwarf2_offset_and_type
**)
12430 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
12432 complaint (&symfile_complaints
,
12433 _("A problem internal to GDB: DIE 0x%x has type already set"),
12435 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
12440 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
12441 not have a saved type. */
12443 static struct type
*
12444 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12446 struct dwarf2_offset_and_type
*slot
, ofs
;
12447 htab_t type_hash
= cu
->type_hash
;
12449 if (type_hash
== NULL
)
12452 ofs
.offset
= die
->offset
;
12453 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
12460 /* Add a dependence relationship from CU to REF_PER_CU. */
12463 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
12464 struct dwarf2_per_cu_data
*ref_per_cu
)
12468 if (cu
->dependencies
== NULL
)
12470 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
12471 NULL
, &cu
->comp_unit_obstack
,
12472 hashtab_obstack_allocate
,
12473 dummy_obstack_deallocate
);
12475 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
12477 *slot
= ref_per_cu
;
12480 /* Subroutine of dwarf2_mark to pass to htab_traverse.
12481 Set the mark field in every compilation unit in the
12482 cache that we must keep because we are keeping CU. */
12485 dwarf2_mark_helper (void **slot
, void *data
)
12487 struct dwarf2_per_cu_data
*per_cu
;
12489 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
12490 if (per_cu
->cu
->mark
)
12492 per_cu
->cu
->mark
= 1;
12494 if (per_cu
->cu
->dependencies
!= NULL
)
12495 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12500 /* Set the mark field in CU and in every other compilation unit in the
12501 cache that we must keep because we are keeping CU. */
12504 dwarf2_mark (struct dwarf2_cu
*cu
)
12509 if (cu
->dependencies
!= NULL
)
12510 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12514 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
12518 per_cu
->cu
->mark
= 0;
12519 per_cu
= per_cu
->cu
->read_in_chain
;
12523 /* Trivial hash function for partial_die_info: the hash value of a DIE
12524 is its offset in .debug_info for this objfile. */
12527 partial_die_hash (const void *item
)
12529 const struct partial_die_info
*part_die
= item
;
12531 return part_die
->offset
;
12534 /* Trivial comparison function for partial_die_info structures: two DIEs
12535 are equal if they have the same offset. */
12538 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
12540 const struct partial_die_info
*part_die_lhs
= item_lhs
;
12541 const struct partial_die_info
*part_die_rhs
= item_rhs
;
12543 return part_die_lhs
->offset
== part_die_rhs
->offset
;
12546 static struct cmd_list_element
*set_dwarf2_cmdlist
;
12547 static struct cmd_list_element
*show_dwarf2_cmdlist
;
12550 set_dwarf2_cmd (char *args
, int from_tty
)
12552 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
12556 show_dwarf2_cmd (char *args
, int from_tty
)
12558 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
12561 /* If section described by INFO was mmapped, munmap it now. */
12564 munmap_section_buffer (struct dwarf2_section_info
*info
)
12566 if (info
->was_mmapped
)
12569 intptr_t begin
= (intptr_t) info
->buffer
;
12570 intptr_t map_begin
= begin
& ~(pagesize
- 1);
12571 size_t map_length
= info
->size
+ begin
- map_begin
;
12573 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
12575 /* Without HAVE_MMAP, we should never be here to begin with. */
12581 /* munmap debug sections for OBJFILE, if necessary. */
12584 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
12586 struct dwarf2_per_objfile
*data
= d
;
12588 munmap_section_buffer (&data
->info
);
12589 munmap_section_buffer (&data
->abbrev
);
12590 munmap_section_buffer (&data
->line
);
12591 munmap_section_buffer (&data
->str
);
12592 munmap_section_buffer (&data
->macinfo
);
12593 munmap_section_buffer (&data
->ranges
);
12594 munmap_section_buffer (&data
->loc
);
12595 munmap_section_buffer (&data
->frame
);
12596 munmap_section_buffer (&data
->eh_frame
);
12599 int dwarf2_always_disassemble
;
12602 show_dwarf2_always_disassemble (struct ui_file
*file
, int from_tty
,
12603 struct cmd_list_element
*c
, const char *value
)
12605 fprintf_filtered (file
, _("\
12606 Whether to always disassemble DWARF expressions is %s.\n"),
12610 void _initialize_dwarf2_read (void);
12613 _initialize_dwarf2_read (void)
12615 dwarf2_objfile_data_key
12616 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
12618 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
12619 Set DWARF 2 specific variables.\n\
12620 Configure DWARF 2 variables such as the cache size"),
12621 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
12622 0/*allow-unknown*/, &maintenance_set_cmdlist
);
12624 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
12625 Show DWARF 2 specific variables\n\
12626 Show DWARF 2 variables such as the cache size"),
12627 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
12628 0/*allow-unknown*/, &maintenance_show_cmdlist
);
12630 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
12631 &dwarf2_max_cache_age
, _("\
12632 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12633 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12634 A higher limit means that cached compilation units will be stored\n\
12635 in memory longer, and more total memory will be used. Zero disables\n\
12636 caching, which can slow down startup."),
12638 show_dwarf2_max_cache_age
,
12639 &set_dwarf2_cmdlist
,
12640 &show_dwarf2_cmdlist
);
12642 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
12643 &dwarf2_always_disassemble
, _("\
12644 Set whether `info address' always disassembles DWARF expressions."), _("\
12645 Show whether `info address' always disassembles DWARF expressions."), _("\
12646 When enabled, DWARF expressions are always printed in an assembly-like\n\
12647 syntax. When disabled, expressions will be printed in a more\n\
12648 conversational style, when possible."),
12650 show_dwarf2_always_disassemble
,
12651 &set_dwarf2_cmdlist
,
12652 &show_dwarf2_cmdlist
);
12654 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
12655 Set debugging of the dwarf2 DIE reader."), _("\
12656 Show debugging of the dwarf2 DIE reader."), _("\
12657 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12658 The value is the maximum depth to print."),
12661 &setdebuglist
, &showdebuglist
);