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 iff currently read in. */
341 struct dwarf2_cu
*cu
;
343 /* If full symbols for this CU have been read in, then this field
344 holds a map of DIE offsets to types. It isn't always possible
345 to reconstruct this information later, so we have to preserve
349 /* The partial symbol table associated with this compilation unit,
350 or NULL for partial units (which do not have an associated
352 struct partial_symtab
*psymtab
;
355 /* Entry in the signatured_types hash table. */
357 struct signatured_type
361 /* Offset in .debug_types of the TU (type_unit) for this type. */
364 /* Offset in .debug_types of the type defined by this TU. */
365 unsigned int type_offset
;
367 /* The CU(/TU) of this type. */
368 struct dwarf2_per_cu_data per_cu
;
371 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
372 which are used for both .debug_info and .debug_types dies.
373 All parameters here are unchanging for the life of the call.
374 This struct exists to abstract away the constant parameters of
377 struct die_reader_specs
379 /* The bfd of this objfile. */
382 /* The CU of the DIE we are parsing. */
383 struct dwarf2_cu
*cu
;
385 /* Pointer to start of section buffer.
386 This is either the start of .debug_info or .debug_types. */
387 const gdb_byte
*buffer
;
390 /* The line number information for a compilation unit (found in the
391 .debug_line section) begins with a "statement program header",
392 which contains the following information. */
395 unsigned int total_length
;
396 unsigned short version
;
397 unsigned int header_length
;
398 unsigned char minimum_instruction_length
;
399 unsigned char maximum_ops_per_instruction
;
400 unsigned char default_is_stmt
;
402 unsigned char line_range
;
403 unsigned char opcode_base
;
405 /* standard_opcode_lengths[i] is the number of operands for the
406 standard opcode whose value is i. This means that
407 standard_opcode_lengths[0] is unused, and the last meaningful
408 element is standard_opcode_lengths[opcode_base - 1]. */
409 unsigned char *standard_opcode_lengths
;
411 /* The include_directories table. NOTE! These strings are not
412 allocated with xmalloc; instead, they are pointers into
413 debug_line_buffer. If you try to free them, `free' will get
415 unsigned int num_include_dirs
, include_dirs_size
;
418 /* The file_names table. NOTE! These strings are not allocated
419 with xmalloc; instead, they are pointers into debug_line_buffer.
420 Don't try to free them directly. */
421 unsigned int num_file_names
, file_names_size
;
425 unsigned int dir_index
;
426 unsigned int mod_time
;
428 int included_p
; /* Non-zero if referenced by the Line Number Program. */
429 struct symtab
*symtab
; /* The associated symbol table, if any. */
432 /* The start and end of the statement program following this
433 header. These point into dwarf2_per_objfile->line_buffer. */
434 gdb_byte
*statement_program_start
, *statement_program_end
;
437 /* When we construct a partial symbol table entry we only
438 need this much information. */
439 struct partial_die_info
441 /* Offset of this DIE. */
444 /* DWARF-2 tag for this DIE. */
445 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
447 /* Assorted flags describing the data found in this DIE. */
448 unsigned int has_children
: 1;
449 unsigned int is_external
: 1;
450 unsigned int is_declaration
: 1;
451 unsigned int has_type
: 1;
452 unsigned int has_specification
: 1;
453 unsigned int has_pc_info
: 1;
455 /* Flag set if the SCOPE field of this structure has been
457 unsigned int scope_set
: 1;
459 /* Flag set if the DIE has a byte_size attribute. */
460 unsigned int has_byte_size
: 1;
462 /* The name of this DIE. Normally the value of DW_AT_name, but
463 sometimes a default name for unnamed DIEs. */
466 /* The scope to prepend to our children. This is generally
467 allocated on the comp_unit_obstack, so will disappear
468 when this compilation unit leaves the cache. */
471 /* The location description associated with this DIE, if any. */
472 struct dwarf_block
*locdesc
;
474 /* If HAS_PC_INFO, the PC range associated with this DIE. */
478 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
479 DW_AT_sibling, if any. */
482 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
483 DW_AT_specification (or DW_AT_abstract_origin or
485 unsigned int spec_offset
;
487 /* Pointers to this DIE's parent, first child, and next sibling,
489 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
492 /* This data structure holds the information of an abbrev. */
495 unsigned int number
; /* number identifying abbrev */
496 enum dwarf_tag tag
; /* dwarf tag */
497 unsigned short has_children
; /* boolean */
498 unsigned short num_attrs
; /* number of attributes */
499 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
500 struct abbrev_info
*next
; /* next in chain */
505 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
506 ENUM_BITFIELD(dwarf_form
) form
: 16;
509 /* Attributes have a name and a value */
512 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
513 ENUM_BITFIELD(dwarf_form
) form
: 15;
515 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
516 field should be in u.str (existing only for DW_STRING) but it is kept
517 here for better struct attribute alignment. */
518 unsigned int string_is_canonical
: 1;
523 struct dwarf_block
*blk
;
527 struct signatured_type
*signatured_type
;
532 /* This data structure holds a complete die structure. */
535 /* DWARF-2 tag for this DIE. */
536 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
538 /* Number of attributes */
539 unsigned short num_attrs
;
544 /* Offset in .debug_info or .debug_types section. */
547 /* The dies in a compilation unit form an n-ary tree. PARENT
548 points to this die's parent; CHILD points to the first child of
549 this node; and all the children of a given node are chained
550 together via their SIBLING fields, terminated by a die whose
552 struct die_info
*child
; /* Its first child, if any. */
553 struct die_info
*sibling
; /* Its next sibling, if any. */
554 struct die_info
*parent
; /* Its parent, if any. */
556 /* An array of attributes, with NUM_ATTRS elements. There may be
557 zero, but it's not common and zero-sized arrays are not
558 sufficiently portable C. */
559 struct attribute attrs
[1];
562 struct function_range
565 CORE_ADDR lowpc
, highpc
;
567 struct function_range
*next
;
570 /* Get at parts of an attribute structure */
572 #define DW_STRING(attr) ((attr)->u.str)
573 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
574 #define DW_UNSND(attr) ((attr)->u.unsnd)
575 #define DW_BLOCK(attr) ((attr)->u.blk)
576 #define DW_SND(attr) ((attr)->u.snd)
577 #define DW_ADDR(attr) ((attr)->u.addr)
578 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
580 /* Blocks are a bunch of untyped bytes. */
587 #ifndef ATTR_ALLOC_CHUNK
588 #define ATTR_ALLOC_CHUNK 4
591 /* Allocate fields for structs, unions and enums in this size. */
592 #ifndef DW_FIELD_ALLOC_CHUNK
593 #define DW_FIELD_ALLOC_CHUNK 4
596 /* A zeroed version of a partial die for initialization purposes. */
597 static struct partial_die_info zeroed_partial_die
;
599 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
600 but this would require a corresponding change in unpack_field_as_long
602 static int bits_per_byte
= 8;
604 /* The routines that read and process dies for a C struct or C++ class
605 pass lists of data member fields and lists of member function fields
606 in an instance of a field_info structure, as defined below. */
609 /* List of data member and baseclasses fields. */
612 struct nextfield
*next
;
617 *fields
, *baseclasses
;
619 /* Number of fields (including baseclasses). */
622 /* Number of baseclasses. */
625 /* Set if the accesibility of one of the fields is not public. */
626 int non_public_fields
;
628 /* Member function fields array, entries are allocated in the order they
629 are encountered in the object file. */
632 struct nextfnfield
*next
;
633 struct fn_field fnfield
;
637 /* Member function fieldlist array, contains name of possibly overloaded
638 member function, number of overloaded member functions and a pointer
639 to the head of the member function field chain. */
644 struct nextfnfield
*head
;
648 /* Number of entries in the fnfieldlists array. */
652 /* One item on the queue of compilation units to read in full symbols
654 struct dwarf2_queue_item
656 struct dwarf2_per_cu_data
*per_cu
;
657 struct dwarf2_queue_item
*next
;
660 /* The current queue. */
661 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
663 /* Loaded secondary compilation units are kept in memory until they
664 have not been referenced for the processing of this many
665 compilation units. Set this to zero to disable caching. Cache
666 sizes of up to at least twenty will improve startup time for
667 typical inter-CU-reference binaries, at an obvious memory cost. */
668 static int dwarf2_max_cache_age
= 5;
670 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
671 struct cmd_list_element
*c
, const char *value
)
673 fprintf_filtered (file
, _("\
674 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
679 /* Various complaints about symbol reading that don't abort the process */
682 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
684 complaint (&symfile_complaints
,
685 _("statement list doesn't fit in .debug_line section"));
689 dwarf2_debug_line_missing_file_complaint (void)
691 complaint (&symfile_complaints
,
692 _(".debug_line section has line data without a file"));
696 dwarf2_debug_line_missing_end_sequence_complaint (void)
698 complaint (&symfile_complaints
,
699 _(".debug_line section has line program sequence without an end"));
703 dwarf2_complex_location_expr_complaint (void)
705 complaint (&symfile_complaints
, _("location expression too complex"));
709 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
712 complaint (&symfile_complaints
,
713 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
718 dwarf2_macros_too_long_complaint (void)
720 complaint (&symfile_complaints
,
721 _("macro info runs off end of `.debug_macinfo' section"));
725 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
727 complaint (&symfile_complaints
,
728 _("macro debug info contains a malformed macro definition:\n`%s'"),
733 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
735 complaint (&symfile_complaints
,
736 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
739 /* local function prototypes */
741 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
743 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
746 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
748 struct partial_symtab
*);
750 static void dwarf2_build_psymtabs_hard (struct objfile
*);
752 static void scan_partial_symbols (struct partial_die_info
*,
753 CORE_ADDR
*, CORE_ADDR
*,
754 int, struct dwarf2_cu
*);
756 static void add_partial_symbol (struct partial_die_info
*,
759 static void add_partial_namespace (struct partial_die_info
*pdi
,
760 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
761 int need_pc
, struct dwarf2_cu
*cu
);
763 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
764 CORE_ADDR
*highpc
, int need_pc
,
765 struct dwarf2_cu
*cu
);
767 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
768 struct dwarf2_cu
*cu
);
770 static void add_partial_subprogram (struct partial_die_info
*pdi
,
771 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
772 int need_pc
, struct dwarf2_cu
*cu
);
774 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
775 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
776 bfd
*abfd
, struct dwarf2_cu
*cu
);
778 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
780 static void psymtab_to_symtab_1 (struct partial_symtab
*);
782 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
784 static void dwarf2_free_abbrev_table (void *);
786 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
789 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
792 static struct partial_die_info
*load_partial_dies (bfd
*,
793 gdb_byte
*, gdb_byte
*,
794 int, struct dwarf2_cu
*);
796 static gdb_byte
*read_partial_die (struct partial_die_info
*,
797 struct abbrev_info
*abbrev
,
799 gdb_byte
*, gdb_byte
*,
802 static struct partial_die_info
*find_partial_die (unsigned int,
805 static void fixup_partial_die (struct partial_die_info
*,
808 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
809 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
811 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
812 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
814 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
816 static int read_1_signed_byte (bfd
*, gdb_byte
*);
818 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
820 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
822 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
824 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
827 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
829 static LONGEST read_checked_initial_length_and_offset
830 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
831 unsigned int *, unsigned int *);
833 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
836 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
838 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
840 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
842 static char *read_indirect_string (bfd
*, gdb_byte
*,
843 const struct comp_unit_head
*,
846 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
848 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
850 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
852 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
854 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
857 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
861 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
862 struct dwarf2_cu
*cu
);
864 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
866 static struct die_info
*die_specification (struct die_info
*die
,
867 struct dwarf2_cu
**);
869 static void free_line_header (struct line_header
*lh
);
871 static void add_file_name (struct line_header
*, char *, unsigned int,
872 unsigned int, unsigned int);
874 static struct line_header
*(dwarf_decode_line_header
875 (unsigned int offset
,
876 bfd
*abfd
, struct dwarf2_cu
*cu
));
878 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
879 struct dwarf2_cu
*, struct partial_symtab
*);
881 static void dwarf2_start_subfile (char *, char *, char *);
883 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
886 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
889 static void dwarf2_const_value_data (struct attribute
*attr
,
893 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
895 static int need_gnat_info (struct dwarf2_cu
*);
897 static struct type
*die_descriptive_type (struct die_info
*, struct dwarf2_cu
*);
899 static void set_descriptive_type (struct type
*, struct die_info
*,
902 static struct type
*die_containing_type (struct die_info
*,
905 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
907 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
909 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
911 static char *typename_concat (struct obstack
*,
916 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
918 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
920 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
922 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
924 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
925 struct dwarf2_cu
*, struct partial_symtab
*);
927 static int dwarf2_get_pc_bounds (struct die_info
*,
928 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
929 struct partial_symtab
*);
931 static void get_scope_pc_bounds (struct die_info
*,
932 CORE_ADDR
*, CORE_ADDR
*,
935 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
936 CORE_ADDR
, struct dwarf2_cu
*);
938 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
941 static void dwarf2_attach_fields_to_type (struct field_info
*,
942 struct type
*, struct dwarf2_cu
*);
944 static void dwarf2_add_member_fn (struct field_info
*,
945 struct die_info
*, struct type
*,
948 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
949 struct type
*, struct dwarf2_cu
*);
951 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
953 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
955 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
957 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
959 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
961 static const char *namespace_name (struct die_info
*die
,
962 int *is_anonymous
, struct dwarf2_cu
*);
964 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
966 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
968 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
971 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
973 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
975 gdb_byte
**new_info_ptr
,
976 struct die_info
*parent
);
978 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
980 gdb_byte
**new_info_ptr
,
981 struct die_info
*parent
);
983 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
985 gdb_byte
**new_info_ptr
,
986 struct die_info
*parent
);
988 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
989 struct die_info
**, gdb_byte
*,
992 static void process_die (struct die_info
*, struct dwarf2_cu
*);
994 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
997 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
999 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1000 struct dwarf2_cu
**);
1002 static char *dwarf_tag_name (unsigned int);
1004 static char *dwarf_attr_name (unsigned int);
1006 static char *dwarf_form_name (unsigned int);
1008 static char *dwarf_stack_op_name (unsigned int);
1010 static char *dwarf_bool_name (unsigned int);
1012 static char *dwarf_type_encoding_name (unsigned int);
1015 static char *dwarf_cfi_name (unsigned int);
1018 static struct die_info
*sibling_die (struct die_info
*);
1020 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1022 static void dump_die_for_error (struct die_info
*);
1024 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1027 /*static*/ void dump_die (struct die_info
*, int max_level
);
1029 static void store_in_ref_table (struct die_info
*,
1030 struct dwarf2_cu
*);
1032 static int is_ref_attr (struct attribute
*);
1034 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1036 static LONGEST
dwarf2_get_attr_constant_value (struct attribute
*, int);
1038 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1040 struct dwarf2_cu
**);
1042 static struct die_info
*follow_die_ref (struct die_info
*,
1044 struct dwarf2_cu
**);
1046 static struct die_info
*follow_die_sig (struct die_info
*,
1048 struct dwarf2_cu
**);
1050 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1051 unsigned int offset
);
1053 static void read_signatured_type (struct objfile
*,
1054 struct signatured_type
*type_sig
);
1056 /* memory allocation interface */
1058 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1060 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1062 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1064 static void initialize_cu_func_list (struct dwarf2_cu
*);
1066 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1067 struct dwarf2_cu
*);
1069 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1070 char *, bfd
*, struct dwarf2_cu
*);
1072 static int attr_form_is_block (struct attribute
*);
1074 static int attr_form_is_section_offset (struct attribute
*);
1076 static int attr_form_is_constant (struct attribute
*);
1078 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1080 struct dwarf2_cu
*cu
);
1082 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1083 struct abbrev_info
*abbrev
,
1084 struct dwarf2_cu
*cu
);
1086 static void free_stack_comp_unit (void *);
1088 static hashval_t
partial_die_hash (const void *item
);
1090 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1092 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1093 (unsigned int offset
, struct objfile
*objfile
);
1095 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1096 (unsigned int offset
, struct objfile
*objfile
);
1098 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1100 static void free_one_comp_unit (void *);
1102 static void free_cached_comp_units (void *);
1104 static void age_cached_comp_units (void);
1106 static void free_one_cached_comp_unit (void *);
1108 static struct type
*set_die_type (struct die_info
*, struct type
*,
1109 struct dwarf2_cu
*);
1111 static void create_all_comp_units (struct objfile
*);
1113 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1116 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1118 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1119 struct dwarf2_per_cu_data
*);
1121 static void dwarf2_mark (struct dwarf2_cu
*);
1123 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1125 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1127 /* Try to locate the sections we need for DWARF 2 debugging
1128 information and return true if we have enough to do something. */
1131 dwarf2_has_info (struct objfile
*objfile
)
1133 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
1134 if (!dwarf2_per_objfile
)
1136 /* Initialize per-objfile state. */
1137 struct dwarf2_per_objfile
*data
1138 = obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1139 memset (data
, 0, sizeof (*data
));
1140 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1141 dwarf2_per_objfile
= data
;
1143 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1144 dwarf2_per_objfile
->objfile
= objfile
;
1146 return (dwarf2_per_objfile
->info
.asection
!= NULL
1147 && dwarf2_per_objfile
->abbrev
.asection
!= NULL
);
1150 /* When loading sections, we can either look for ".<name>", or for
1151 * ".z<name>", which indicates a compressed section. */
1154 section_is_p (const char *section_name
, const char *name
)
1156 return (section_name
[0] == '.'
1157 && (strcmp (section_name
+ 1, name
) == 0
1158 || (section_name
[1] == 'z'
1159 && strcmp (section_name
+ 2, name
) == 0)));
1162 /* This function is mapped across the sections and remembers the
1163 offset and size of each of the debugging sections we are interested
1167 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1169 if (section_is_p (sectp
->name
, INFO_SECTION
))
1171 dwarf2_per_objfile
->info
.asection
= sectp
;
1172 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1174 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1176 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1177 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1179 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1181 dwarf2_per_objfile
->line
.asection
= sectp
;
1182 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1184 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1186 dwarf2_per_objfile
->loc
.asection
= sectp
;
1187 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1189 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1191 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1192 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1194 else if (section_is_p (sectp
->name
, STR_SECTION
))
1196 dwarf2_per_objfile
->str
.asection
= sectp
;
1197 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1199 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1201 dwarf2_per_objfile
->frame
.asection
= sectp
;
1202 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1204 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1206 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1207 if (aflag
& SEC_HAS_CONTENTS
)
1209 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1210 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1213 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1215 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1216 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1218 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1220 dwarf2_per_objfile
->types
.asection
= sectp
;
1221 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1224 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1225 && bfd_section_vma (abfd
, sectp
) == 0)
1226 dwarf2_per_objfile
->has_section_at_zero
= 1;
1229 /* Decompress a section that was compressed using zlib. Store the
1230 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1233 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1234 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1236 bfd
*abfd
= objfile
->obfd
;
1238 error (_("Support for zlib-compressed DWARF data (from '%s') "
1239 "is disabled in this copy of GDB"),
1240 bfd_get_filename (abfd
));
1242 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1243 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1244 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1245 bfd_size_type uncompressed_size
;
1246 gdb_byte
*uncompressed_buffer
;
1249 int header_size
= 12;
1251 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1252 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1253 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1254 bfd_get_filename (abfd
));
1256 /* Read the zlib header. In this case, it should be "ZLIB" followed
1257 by the uncompressed section size, 8 bytes in big-endian order. */
1258 if (compressed_size
< header_size
1259 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1260 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1261 bfd_get_filename (abfd
));
1262 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1263 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1264 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1265 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1266 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1267 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1268 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1269 uncompressed_size
+= compressed_buffer
[11];
1271 /* It is possible the section consists of several compressed
1272 buffers concatenated together, so we uncompress in a loop. */
1276 strm
.avail_in
= compressed_size
- header_size
;
1277 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1278 strm
.avail_out
= uncompressed_size
;
1279 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1281 rc
= inflateInit (&strm
);
1282 while (strm
.avail_in
> 0)
1285 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1286 bfd_get_filename (abfd
), rc
);
1287 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1288 + (uncompressed_size
- strm
.avail_out
));
1289 rc
= inflate (&strm
, Z_FINISH
);
1290 if (rc
!= Z_STREAM_END
)
1291 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1292 bfd_get_filename (abfd
), rc
);
1293 rc
= inflateReset (&strm
);
1295 rc
= inflateEnd (&strm
);
1297 || strm
.avail_out
!= 0)
1298 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1299 bfd_get_filename (abfd
), rc
);
1301 do_cleanups (cleanup
);
1302 *outbuf
= uncompressed_buffer
;
1303 *outsize
= uncompressed_size
;
1307 /* Read the contents of the section SECTP from object file specified by
1308 OBJFILE, store info about the section into INFO.
1309 If the section is compressed, uncompress it before returning. */
1312 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1314 bfd
*abfd
= objfile
->obfd
;
1315 asection
*sectp
= info
->asection
;
1316 gdb_byte
*buf
, *retbuf
;
1317 unsigned char header
[4];
1321 info
->buffer
= NULL
;
1322 info
->was_mmapped
= 0;
1325 if (info
->asection
== NULL
|| info
->size
== 0)
1328 /* Check if the file has a 4-byte header indicating compression. */
1329 if (info
->size
> sizeof (header
)
1330 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1331 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1333 /* Upon decompression, update the buffer and its size. */
1334 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1336 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1344 pagesize
= getpagesize ();
1346 /* Only try to mmap sections which are large enough: we don't want to
1347 waste space due to fragmentation. Also, only try mmap for sections
1348 without relocations. */
1350 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1352 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1353 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1354 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1355 MAP_PRIVATE
, pg_offset
);
1357 if (retbuf
!= MAP_FAILED
)
1359 info
->was_mmapped
= 1;
1360 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1361 #if HAVE_POSIX_MADVISE
1362 posix_madvise (retbuf
, map_length
, POSIX_MADV_WILLNEED
);
1369 /* If we get here, we are a normal, not-compressed section. */
1371 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1373 /* When debugging .o files, we may need to apply relocations; see
1374 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1375 We never compress sections in .o files, so we only need to
1376 try this when the section is not compressed. */
1377 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
1380 info
->buffer
= retbuf
;
1384 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1385 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1386 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1387 bfd_get_filename (abfd
));
1390 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1394 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1395 asection
**sectp
, gdb_byte
**bufp
,
1396 bfd_size_type
*sizep
)
1398 struct dwarf2_per_objfile
*data
1399 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1400 struct dwarf2_section_info
*info
;
1402 /* We may see an objfile without any DWARF, in which case we just
1411 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1412 info
= &data
->eh_frame
;
1413 else if (section_is_p (section_name
, FRAME_SECTION
))
1414 info
= &data
->frame
;
1418 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1419 /* We haven't read this section in yet. Do it now. */
1420 dwarf2_read_section (objfile
, info
);
1422 *sectp
= info
->asection
;
1423 *bufp
= info
->buffer
;
1424 *sizep
= info
->size
;
1427 /* Build a partial symbol table. */
1430 dwarf2_build_psymtabs (struct objfile
*objfile
)
1432 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
1434 init_psymbol_list (objfile
, 1024);
1437 dwarf2_build_psymtabs_hard (objfile
);
1440 /* Return TRUE if OFFSET is within CU_HEADER. */
1443 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1445 unsigned int bottom
= cu_header
->offset
;
1446 unsigned int top
= (cu_header
->offset
1448 + cu_header
->initial_length_size
);
1449 return (offset
>= bottom
&& offset
< top
);
1452 /* Read in the comp unit header information from the debug_info at info_ptr.
1453 NOTE: This leaves members offset, first_die_offset to be filled in
1457 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1458 gdb_byte
*info_ptr
, bfd
*abfd
)
1461 unsigned int bytes_read
;
1463 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1464 cu_header
->initial_length_size
= bytes_read
;
1465 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1466 info_ptr
+= bytes_read
;
1467 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1469 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1471 info_ptr
+= bytes_read
;
1472 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1474 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1475 if (signed_addr
< 0)
1476 internal_error (__FILE__
, __LINE__
,
1477 _("read_comp_unit_head: dwarf from non elf file"));
1478 cu_header
->signed_addr_p
= signed_addr
;
1484 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1485 gdb_byte
*buffer
, unsigned int buffer_size
,
1488 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1490 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1492 if (header
->version
!= 2 && header
->version
!= 3 && header
->version
!= 4)
1493 error (_("Dwarf Error: wrong version in compilation unit header "
1494 "(is %d, should be 2, 3, or 4) [in module %s]"), header
->version
,
1495 bfd_get_filename (abfd
));
1497 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1498 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1499 "(offset 0x%lx + 6) [in module %s]"),
1500 (long) header
->abbrev_offset
,
1501 (long) (beg_of_comp_unit
- buffer
),
1502 bfd_get_filename (abfd
));
1504 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1505 > buffer
+ buffer_size
)
1506 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1507 "(offset 0x%lx + 0) [in module %s]"),
1508 (long) header
->length
,
1509 (long) (beg_of_comp_unit
- buffer
),
1510 bfd_get_filename (abfd
));
1515 /* Read in the types comp unit header information from .debug_types entry at
1516 types_ptr. The result is a pointer to one past the end of the header. */
1519 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
1520 ULONGEST
*signature
,
1521 gdb_byte
*types_ptr
, bfd
*abfd
)
1523 unsigned int bytes_read
;
1524 gdb_byte
*initial_types_ptr
= types_ptr
;
1526 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->types
);
1527 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
1529 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
1531 *signature
= read_8_bytes (abfd
, types_ptr
);
1533 types_ptr
+= cu_header
->offset_size
;
1534 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
1539 /* Allocate a new partial symtab for file named NAME and mark this new
1540 partial symtab as being an include of PST. */
1543 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1544 struct objfile
*objfile
)
1546 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1548 subpst
->section_offsets
= pst
->section_offsets
;
1549 subpst
->textlow
= 0;
1550 subpst
->texthigh
= 0;
1552 subpst
->dependencies
= (struct partial_symtab
**)
1553 obstack_alloc (&objfile
->objfile_obstack
,
1554 sizeof (struct partial_symtab
*));
1555 subpst
->dependencies
[0] = pst
;
1556 subpst
->number_of_dependencies
= 1;
1558 subpst
->globals_offset
= 0;
1559 subpst
->n_global_syms
= 0;
1560 subpst
->statics_offset
= 0;
1561 subpst
->n_static_syms
= 0;
1562 subpst
->symtab
= NULL
;
1563 subpst
->read_symtab
= pst
->read_symtab
;
1566 /* No private part is necessary for include psymtabs. This property
1567 can be used to differentiate between such include psymtabs and
1568 the regular ones. */
1569 subpst
->read_symtab_private
= NULL
;
1572 /* Read the Line Number Program data and extract the list of files
1573 included by the source file represented by PST. Build an include
1574 partial symtab for each of these included files. */
1577 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1578 struct die_info
*die
,
1579 struct partial_symtab
*pst
)
1581 struct objfile
*objfile
= cu
->objfile
;
1582 bfd
*abfd
= objfile
->obfd
;
1583 struct line_header
*lh
= NULL
;
1584 struct attribute
*attr
;
1586 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
1589 unsigned int line_offset
= DW_UNSND (attr
);
1590 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
1593 return; /* No linetable, so no includes. */
1595 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1597 free_line_header (lh
);
1601 hash_type_signature (const void *item
)
1603 const struct signatured_type
*type_sig
= item
;
1604 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1605 return type_sig
->signature
;
1609 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
1611 const struct signatured_type
*lhs
= item_lhs
;
1612 const struct signatured_type
*rhs
= item_rhs
;
1613 return lhs
->signature
== rhs
->signature
;
1616 /* Create the hash table of all entries in the .debug_types section.
1617 The result is zero if there is an error (e.g. missing .debug_types section),
1618 otherwise non-zero. */
1621 create_debug_types_hash_table (struct objfile
*objfile
)
1626 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
1627 info_ptr
= dwarf2_per_objfile
->types
.buffer
;
1629 if (info_ptr
== NULL
)
1631 dwarf2_per_objfile
->signatured_types
= NULL
;
1635 types_htab
= htab_create_alloc_ex (41,
1636 hash_type_signature
,
1639 &objfile
->objfile_obstack
,
1640 hashtab_obstack_allocate
,
1641 dummy_obstack_deallocate
);
1643 if (dwarf2_die_debug
)
1644 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
1646 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1648 unsigned int offset
;
1649 unsigned int offset_size
;
1650 unsigned int type_offset
;
1651 unsigned int length
, initial_length_size
;
1652 unsigned short version
;
1654 struct signatured_type
*type_sig
;
1656 gdb_byte
*ptr
= info_ptr
;
1658 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
1660 /* We need to read the type's signature in order to build the hash
1661 table, but we don't need to read anything else just yet. */
1663 /* Sanity check to ensure entire cu is present. */
1664 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
1665 if (ptr
+ length
+ initial_length_size
1666 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1668 complaint (&symfile_complaints
,
1669 _("debug type entry runs off end of `.debug_types' section, ignored"));
1673 offset_size
= initial_length_size
== 4 ? 4 : 8;
1674 ptr
+= initial_length_size
;
1675 version
= bfd_get_16 (objfile
->obfd
, ptr
);
1677 ptr
+= offset_size
; /* abbrev offset */
1678 ptr
+= 1; /* address size */
1679 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
1681 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
1683 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
1684 memset (type_sig
, 0, sizeof (*type_sig
));
1685 type_sig
->signature
= signature
;
1686 type_sig
->offset
= offset
;
1687 type_sig
->type_offset
= type_offset
;
1689 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
1690 gdb_assert (slot
!= NULL
);
1693 if (dwarf2_die_debug
)
1694 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
1695 offset
, phex (signature
, sizeof (signature
)));
1697 info_ptr
= info_ptr
+ initial_length_size
+ length
;
1700 dwarf2_per_objfile
->signatured_types
= types_htab
;
1705 /* Lookup a signature based type.
1706 Returns NULL if SIG is not present in the table. */
1708 static struct signatured_type
*
1709 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
1711 struct signatured_type find_entry
, *entry
;
1713 if (dwarf2_per_objfile
->signatured_types
== NULL
)
1715 complaint (&symfile_complaints
,
1716 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1720 find_entry
.signature
= sig
;
1721 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
1725 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1728 init_cu_die_reader (struct die_reader_specs
*reader
,
1729 struct dwarf2_cu
*cu
)
1731 reader
->abfd
= cu
->objfile
->obfd
;
1733 if (cu
->per_cu
->from_debug_types
)
1735 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1736 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
1740 gdb_assert (dwarf2_per_objfile
->info
.readin
);
1741 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
1745 /* Find the base address of the compilation unit for range lists and
1746 location lists. It will normally be specified by DW_AT_low_pc.
1747 In DWARF-3 draft 4, the base address could be overridden by
1748 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1749 compilation units with discontinuous ranges. */
1752 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
1754 struct attribute
*attr
;
1757 cu
->base_address
= 0;
1759 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
1762 cu
->base_address
= DW_ADDR (attr
);
1767 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
1770 cu
->base_address
= DW_ADDR (attr
);
1776 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1777 to combine the common parts.
1778 Process a compilation unit for a psymtab.
1779 BUFFER is a pointer to the beginning of the dwarf section buffer,
1780 either .debug_info or debug_types.
1781 INFO_PTR is a pointer to the start of the CU.
1782 Returns a pointer to the next CU. */
1785 process_psymtab_comp_unit (struct objfile
*objfile
,
1786 struct dwarf2_per_cu_data
*this_cu
,
1787 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1788 unsigned int buffer_size
)
1790 bfd
*abfd
= objfile
->obfd
;
1791 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1792 struct die_info
*comp_unit_die
;
1793 struct partial_symtab
*pst
;
1795 struct cleanup
*back_to_inner
;
1796 struct dwarf2_cu cu
;
1797 unsigned int bytes_read
;
1798 int has_children
, has_pc_info
;
1799 struct attribute
*attr
;
1801 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
1802 struct die_reader_specs reader_specs
;
1804 memset (&cu
, 0, sizeof (cu
));
1805 cu
.objfile
= objfile
;
1806 obstack_init (&cu
.comp_unit_obstack
);
1808 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1810 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
1811 buffer
, buffer_size
,
1814 /* Complete the cu_header. */
1815 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
1816 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1818 cu
.list_in_scope
= &file_symbols
;
1820 /* If this compilation unit was already read in, free the
1821 cached copy in order to read it in again. This is
1822 necessary because we skipped some symbols when we first
1823 read in the compilation unit (see load_partial_dies).
1824 This problem could be avoided, but the benefit is
1826 if (this_cu
->cu
!= NULL
)
1827 free_one_cached_comp_unit (this_cu
->cu
);
1829 /* Note that this is a pointer to our stack frame, being
1830 added to a global data structure. It will be cleaned up
1831 in free_stack_comp_unit when we finish with this
1832 compilation unit. */
1834 cu
.per_cu
= this_cu
;
1836 /* Read the abbrevs for this compilation unit into a table. */
1837 dwarf2_read_abbrevs (abfd
, &cu
);
1838 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1840 /* Read the compilation unit die. */
1841 if (this_cu
->from_debug_types
)
1842 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1843 init_cu_die_reader (&reader_specs
, &cu
);
1844 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1847 if (this_cu
->from_debug_types
)
1849 /* offset,length haven't been set yet for type units. */
1850 this_cu
->offset
= cu
.header
.offset
;
1851 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1853 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1855 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1856 + cu
.header
.initial_length_size
);
1857 do_cleanups (back_to_inner
);
1861 /* Set the language we're debugging. */
1862 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1864 set_cu_language (DW_UNSND (attr
), &cu
);
1866 set_cu_language (language_minimal
, &cu
);
1868 /* Allocate a new partial symbol table structure. */
1869 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1870 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1871 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1872 /* TEXTLOW and TEXTHIGH are set below. */
1874 objfile
->global_psymbols
.next
,
1875 objfile
->static_psymbols
.next
);
1877 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1879 pst
->dirname
= DW_STRING (attr
);
1881 pst
->read_symtab_private
= this_cu
;
1883 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1885 /* Store the function that reads in the rest of the symbol table */
1886 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1888 this_cu
->psymtab
= pst
;
1890 dwarf2_find_base_address (comp_unit_die
, &cu
);
1892 /* Possibly set the default values of LOWPC and HIGHPC from
1894 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1895 &best_highpc
, &cu
, pst
);
1896 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1897 /* Store the contiguous range if it is not empty; it can be empty for
1898 CUs with no code. */
1899 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1900 best_lowpc
+ baseaddr
,
1901 best_highpc
+ baseaddr
- 1, pst
);
1903 /* Check if comp unit has_children.
1904 If so, read the rest of the partial symbols from this comp unit.
1905 If not, there's no more debug_info for this comp unit. */
1908 struct partial_die_info
*first_die
;
1909 CORE_ADDR lowpc
, highpc
;
1911 lowpc
= ((CORE_ADDR
) -1);
1912 highpc
= ((CORE_ADDR
) 0);
1914 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1916 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1917 ! has_pc_info
, &cu
);
1919 /* If we didn't find a lowpc, set it to highpc to avoid
1920 complaints from `maint check'. */
1921 if (lowpc
== ((CORE_ADDR
) -1))
1924 /* If the compilation unit didn't have an explicit address range,
1925 then use the information extracted from its child dies. */
1929 best_highpc
= highpc
;
1932 pst
->textlow
= best_lowpc
+ baseaddr
;
1933 pst
->texthigh
= best_highpc
+ baseaddr
;
1935 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1936 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1937 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1938 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1939 sort_pst_symbols (pst
);
1941 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1942 + cu
.header
.initial_length_size
);
1944 if (this_cu
->from_debug_types
)
1946 /* It's not clear we want to do anything with stmt lists here.
1947 Waiting to see what gcc ultimately does. */
1951 /* Get the list of files included in the current compilation unit,
1952 and build a psymtab for each of them. */
1953 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
1956 do_cleanups (back_to_inner
);
1961 /* Traversal function for htab_traverse_noresize.
1962 Process one .debug_types comp-unit. */
1965 process_type_comp_unit (void **slot
, void *info
)
1967 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
1968 struct objfile
*objfile
= (struct objfile
*) info
;
1969 struct dwarf2_per_cu_data
*this_cu
;
1971 this_cu
= &entry
->per_cu
;
1972 this_cu
->from_debug_types
= 1;
1974 gdb_assert (dwarf2_per_objfile
->types
.readin
);
1975 process_psymtab_comp_unit (objfile
, this_cu
,
1976 dwarf2_per_objfile
->types
.buffer
,
1977 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
1978 dwarf2_per_objfile
->types
.size
);
1983 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
1984 Build partial symbol tables for the .debug_types comp-units. */
1987 build_type_psymtabs (struct objfile
*objfile
)
1989 if (! create_debug_types_hash_table (objfile
))
1992 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
1993 process_type_comp_unit
, objfile
);
1996 /* Build the partial symbol table by doing a quick pass through the
1997 .debug_info and .debug_abbrev sections. */
2000 dwarf2_build_psymtabs_hard (struct objfile
*objfile
)
2002 bfd
*abfd
= objfile
->obfd
;
2004 struct cleanup
*back_to
;
2006 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2007 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2009 /* Any cached compilation units will be linked by the per-objfile
2010 read_in_chain. Make sure to free them when we're done. */
2011 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2013 build_type_psymtabs (objfile
);
2015 create_all_comp_units (objfile
);
2017 objfile
->psymtabs_addrmap
=
2018 addrmap_create_mutable (&objfile
->objfile_obstack
);
2020 /* Since the objects we're extracting from .debug_info vary in
2021 length, only the individual functions to extract them (like
2022 read_comp_unit_head and load_partial_die) can really know whether
2023 the buffer is large enough to hold another complete object.
2025 At the moment, they don't actually check that. If .debug_info
2026 holds just one extra byte after the last compilation unit's dies,
2027 then read_comp_unit_head will happily read off the end of the
2028 buffer. read_partial_die is similarly casual. Those functions
2031 For this loop condition, simply checking whether there's any data
2032 left at all should be sufficient. */
2034 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2035 + dwarf2_per_objfile
->info
.size
))
2037 struct dwarf2_per_cu_data
*this_cu
;
2039 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2042 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2043 dwarf2_per_objfile
->info
.buffer
,
2045 dwarf2_per_objfile
->info
.size
);
2048 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2049 &objfile
->objfile_obstack
);
2051 do_cleanups (back_to
);
2054 /* Load the partial DIEs for a secondary CU into memory. */
2057 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2058 struct objfile
*objfile
)
2060 bfd
*abfd
= objfile
->obfd
;
2061 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2062 struct die_info
*comp_unit_die
;
2063 struct dwarf2_cu
*cu
;
2064 unsigned int bytes_read
;
2065 struct cleanup
*back_to
;
2066 struct attribute
*attr
;
2068 struct die_reader_specs reader_specs
;
2070 gdb_assert (! this_cu
->from_debug_types
);
2072 gdb_assert (dwarf2_per_objfile
->info
.readin
);
2073 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2074 beg_of_comp_unit
= info_ptr
;
2076 cu
= alloc_one_comp_unit (objfile
);
2078 /* ??? Missing cleanup for CU? */
2080 /* Link this compilation unit into the compilation unit tree. */
2082 cu
->per_cu
= this_cu
;
2083 cu
->type_hash
= this_cu
->type_hash
;
2085 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2086 dwarf2_per_objfile
->info
.buffer
,
2087 dwarf2_per_objfile
->info
.size
,
2090 /* Complete the cu_header. */
2091 cu
->header
.offset
= this_cu
->offset
;
2092 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2094 /* Read the abbrevs for this compilation unit into a table. */
2095 dwarf2_read_abbrevs (abfd
, cu
);
2096 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2098 /* Read the compilation unit die. */
2099 init_cu_die_reader (&reader_specs
, cu
);
2100 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2103 /* Set the language we're debugging. */
2104 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2106 set_cu_language (DW_UNSND (attr
), cu
);
2108 set_cu_language (language_minimal
, cu
);
2110 /* Check if comp unit has_children.
2111 If so, read the rest of the partial symbols from this comp unit.
2112 If not, there's no more debug_info for this comp unit. */
2114 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2116 do_cleanups (back_to
);
2119 /* Create a list of all compilation units in OBJFILE. We do this only
2120 if an inter-comp-unit reference is found; presumably if there is one,
2121 there will be many, and one will occur early in the .debug_info section.
2122 So there's no point in building this list incrementally. */
2125 create_all_comp_units (struct objfile
*objfile
)
2129 struct dwarf2_per_cu_data
**all_comp_units
;
2132 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
2133 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2137 all_comp_units
= xmalloc (n_allocated
2138 * sizeof (struct dwarf2_per_cu_data
*));
2140 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2142 unsigned int length
, initial_length_size
;
2143 gdb_byte
*beg_of_comp_unit
;
2144 struct dwarf2_per_cu_data
*this_cu
;
2145 unsigned int offset
;
2147 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2149 /* Read just enough information to find out where the next
2150 compilation unit is. */
2151 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2152 &initial_length_size
);
2154 /* Save the compilation unit for later lookup. */
2155 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2156 sizeof (struct dwarf2_per_cu_data
));
2157 memset (this_cu
, 0, sizeof (*this_cu
));
2158 this_cu
->offset
= offset
;
2159 this_cu
->length
= length
+ initial_length_size
;
2161 if (n_comp_units
== n_allocated
)
2164 all_comp_units
= xrealloc (all_comp_units
,
2166 * sizeof (struct dwarf2_per_cu_data
*));
2168 all_comp_units
[n_comp_units
++] = this_cu
;
2170 info_ptr
= info_ptr
+ this_cu
->length
;
2173 dwarf2_per_objfile
->all_comp_units
2174 = obstack_alloc (&objfile
->objfile_obstack
,
2175 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2176 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2177 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2178 xfree (all_comp_units
);
2179 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2182 /* Process all loaded DIEs for compilation unit CU, starting at
2183 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2184 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2185 DW_AT_ranges). If NEED_PC is set, then this function will set
2186 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2187 and record the covered ranges in the addrmap. */
2190 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2191 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2193 struct objfile
*objfile
= cu
->objfile
;
2194 bfd
*abfd
= objfile
->obfd
;
2195 struct partial_die_info
*pdi
;
2197 /* Now, march along the PDI's, descending into ones which have
2198 interesting children but skipping the children of the other ones,
2199 until we reach the end of the compilation unit. */
2205 fixup_partial_die (pdi
, cu
);
2207 /* Anonymous namespaces have no name but have interesting
2208 children, so we need to look at them. Ditto for anonymous
2211 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2212 || pdi
->tag
== DW_TAG_enumeration_type
)
2216 case DW_TAG_subprogram
:
2217 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2219 case DW_TAG_variable
:
2220 case DW_TAG_typedef
:
2221 case DW_TAG_union_type
:
2222 if (!pdi
->is_declaration
)
2224 add_partial_symbol (pdi
, cu
);
2227 case DW_TAG_class_type
:
2228 case DW_TAG_interface_type
:
2229 case DW_TAG_structure_type
:
2230 if (!pdi
->is_declaration
)
2232 add_partial_symbol (pdi
, cu
);
2235 case DW_TAG_enumeration_type
:
2236 if (!pdi
->is_declaration
)
2237 add_partial_enumeration (pdi
, cu
);
2239 case DW_TAG_base_type
:
2240 case DW_TAG_subrange_type
:
2241 /* File scope base type definitions are added to the partial
2243 add_partial_symbol (pdi
, cu
);
2245 case DW_TAG_namespace
:
2246 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2249 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2256 /* If the die has a sibling, skip to the sibling. */
2258 pdi
= pdi
->die_sibling
;
2262 /* Functions used to compute the fully scoped name of a partial DIE.
2264 Normally, this is simple. For C++, the parent DIE's fully scoped
2265 name is concatenated with "::" and the partial DIE's name. For
2266 Java, the same thing occurs except that "." is used instead of "::".
2267 Enumerators are an exception; they use the scope of their parent
2268 enumeration type, i.e. the name of the enumeration type is not
2269 prepended to the enumerator.
2271 There are two complexities. One is DW_AT_specification; in this
2272 case "parent" means the parent of the target of the specification,
2273 instead of the direct parent of the DIE. The other is compilers
2274 which do not emit DW_TAG_namespace; in this case we try to guess
2275 the fully qualified name of structure types from their members'
2276 linkage names. This must be done using the DIE's children rather
2277 than the children of any DW_AT_specification target. We only need
2278 to do this for structures at the top level, i.e. if the target of
2279 any DW_AT_specification (if any; otherwise the DIE itself) does not
2282 /* Compute the scope prefix associated with PDI's parent, in
2283 compilation unit CU. The result will be allocated on CU's
2284 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2285 field. NULL is returned if no prefix is necessary. */
2287 partial_die_parent_scope (struct partial_die_info
*pdi
,
2288 struct dwarf2_cu
*cu
)
2290 char *grandparent_scope
;
2291 struct partial_die_info
*parent
, *real_pdi
;
2293 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2294 then this means the parent of the specification DIE. */
2297 while (real_pdi
->has_specification
)
2298 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2300 parent
= real_pdi
->die_parent
;
2304 if (parent
->scope_set
)
2305 return parent
->scope
;
2307 fixup_partial_die (parent
, cu
);
2309 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2311 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
2312 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
2313 Work around this problem here. */
2314 if (cu
->language
== language_cplus
2315 && parent
->tag
== DW_TAG_namespace
2316 && strcmp (parent
->name
, "::") == 0
2317 && grandparent_scope
== NULL
)
2319 parent
->scope
= NULL
;
2320 parent
->scope_set
= 1;
2324 if (parent
->tag
== DW_TAG_namespace
2325 || parent
->tag
== DW_TAG_structure_type
2326 || parent
->tag
== DW_TAG_class_type
2327 || parent
->tag
== DW_TAG_interface_type
2328 || parent
->tag
== DW_TAG_union_type
2329 || parent
->tag
== DW_TAG_enumeration_type
)
2331 if (grandparent_scope
== NULL
)
2332 parent
->scope
= parent
->name
;
2334 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2337 else if (parent
->tag
== DW_TAG_enumerator
)
2338 /* Enumerators should not get the name of the enumeration as a prefix. */
2339 parent
->scope
= grandparent_scope
;
2342 /* FIXME drow/2004-04-01: What should we be doing with
2343 function-local names? For partial symbols, we should probably be
2345 complaint (&symfile_complaints
,
2346 _("unhandled containing DIE tag %d for DIE at %d"),
2347 parent
->tag
, pdi
->offset
);
2348 parent
->scope
= grandparent_scope
;
2351 parent
->scope_set
= 1;
2352 return parent
->scope
;
2355 /* Return the fully scoped name associated with PDI, from compilation unit
2356 CU. The result will be allocated with malloc. */
2358 partial_die_full_name (struct partial_die_info
*pdi
,
2359 struct dwarf2_cu
*cu
)
2363 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2364 if (parent_scope
== NULL
)
2367 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
2371 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2373 struct objfile
*objfile
= cu
->objfile
;
2375 char *actual_name
= NULL
;
2376 const char *my_prefix
;
2377 const struct partial_symbol
*psym
= NULL
;
2379 int built_actual_name
= 0;
2381 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2383 actual_name
= partial_die_full_name (pdi
, cu
);
2385 built_actual_name
= 1;
2387 if (actual_name
== NULL
)
2388 actual_name
= pdi
->name
;
2392 case DW_TAG_subprogram
:
2393 if (pdi
->is_external
|| cu
->language
== language_ada
)
2395 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2396 of the global scope. But in Ada, we want to be able to access
2397 nested procedures globally. So all Ada subprograms are stored
2398 in the global scope. */
2399 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2400 mst_text, objfile); */
2401 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2403 VAR_DOMAIN
, LOC_BLOCK
,
2404 &objfile
->global_psymbols
,
2405 0, pdi
->lowpc
+ baseaddr
,
2406 cu
->language
, objfile
);
2410 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2411 mst_file_text, objfile); */
2412 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2414 VAR_DOMAIN
, LOC_BLOCK
,
2415 &objfile
->static_psymbols
,
2416 0, pdi
->lowpc
+ baseaddr
,
2417 cu
->language
, objfile
);
2420 case DW_TAG_variable
:
2421 if (pdi
->is_external
)
2424 Don't enter into the minimal symbol tables as there is
2425 a minimal symbol table entry from the ELF symbols already.
2426 Enter into partial symbol table if it has a location
2427 descriptor or a type.
2428 If the location descriptor is missing, new_symbol will create
2429 a LOC_UNRESOLVED symbol, the address of the variable will then
2430 be determined from the minimal symbol table whenever the variable
2432 The address for the partial symbol table entry is not
2433 used by GDB, but it comes in handy for debugging partial symbol
2437 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2438 if (pdi
->locdesc
|| pdi
->has_type
)
2439 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2441 VAR_DOMAIN
, LOC_STATIC
,
2442 &objfile
->global_psymbols
,
2444 cu
->language
, objfile
);
2448 /* Static Variable. Skip symbols without location descriptors. */
2449 if (pdi
->locdesc
== NULL
)
2451 if (built_actual_name
)
2452 xfree (actual_name
);
2455 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2456 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2457 mst_file_data, objfile); */
2458 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2460 VAR_DOMAIN
, LOC_STATIC
,
2461 &objfile
->static_psymbols
,
2463 cu
->language
, objfile
);
2466 case DW_TAG_typedef
:
2467 case DW_TAG_base_type
:
2468 case DW_TAG_subrange_type
:
2469 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2471 VAR_DOMAIN
, LOC_TYPEDEF
,
2472 &objfile
->static_psymbols
,
2473 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2475 case DW_TAG_namespace
:
2476 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2478 VAR_DOMAIN
, LOC_TYPEDEF
,
2479 &objfile
->global_psymbols
,
2480 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2482 case DW_TAG_class_type
:
2483 case DW_TAG_interface_type
:
2484 case DW_TAG_structure_type
:
2485 case DW_TAG_union_type
:
2486 case DW_TAG_enumeration_type
:
2487 /* Skip external references. The DWARF standard says in the section
2488 about "Structure, Union, and Class Type Entries": "An incomplete
2489 structure, union or class type is represented by a structure,
2490 union or class entry that does not have a byte size attribute
2491 and that has a DW_AT_declaration attribute." */
2492 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2494 if (built_actual_name
)
2495 xfree (actual_name
);
2499 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2500 static vs. global. */
2501 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2503 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2504 (cu
->language
== language_cplus
2505 || cu
->language
== language_java
)
2506 ? &objfile
->global_psymbols
2507 : &objfile
->static_psymbols
,
2508 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2511 case DW_TAG_enumerator
:
2512 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2514 VAR_DOMAIN
, LOC_CONST
,
2515 (cu
->language
== language_cplus
2516 || cu
->language
== language_java
)
2517 ? &objfile
->global_psymbols
2518 : &objfile
->static_psymbols
,
2519 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2525 if (built_actual_name
)
2526 xfree (actual_name
);
2529 /* Read a partial die corresponding to a namespace; also, add a symbol
2530 corresponding to that namespace to the symbol table. NAMESPACE is
2531 the name of the enclosing namespace. */
2534 add_partial_namespace (struct partial_die_info
*pdi
,
2535 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2536 int need_pc
, struct dwarf2_cu
*cu
)
2538 struct objfile
*objfile
= cu
->objfile
;
2540 /* Add a symbol for the namespace. */
2542 add_partial_symbol (pdi
, cu
);
2544 /* Now scan partial symbols in that namespace. */
2546 if (pdi
->has_children
)
2547 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2550 /* Read a partial die corresponding to a Fortran module. */
2553 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2554 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2556 /* Now scan partial symbols in that module.
2558 FIXME: Support the separate Fortran module namespaces. */
2560 if (pdi
->has_children
)
2561 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2564 /* Read a partial die corresponding to a subprogram and create a partial
2565 symbol for that subprogram. When the CU language allows it, this
2566 routine also defines a partial symbol for each nested subprogram
2567 that this subprogram contains.
2569 DIE my also be a lexical block, in which case we simply search
2570 recursively for suprograms defined inside that lexical block.
2571 Again, this is only performed when the CU language allows this
2572 type of definitions. */
2575 add_partial_subprogram (struct partial_die_info
*pdi
,
2576 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2577 int need_pc
, struct dwarf2_cu
*cu
)
2579 if (pdi
->tag
== DW_TAG_subprogram
)
2581 if (pdi
->has_pc_info
)
2583 if (pdi
->lowpc
< *lowpc
)
2584 *lowpc
= pdi
->lowpc
;
2585 if (pdi
->highpc
> *highpc
)
2586 *highpc
= pdi
->highpc
;
2590 struct objfile
*objfile
= cu
->objfile
;
2592 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2593 SECT_OFF_TEXT (objfile
));
2594 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2595 pdi
->lowpc
+ baseaddr
,
2596 pdi
->highpc
- 1 + baseaddr
,
2597 cu
->per_cu
->psymtab
);
2599 if (!pdi
->is_declaration
)
2600 /* Ignore subprogram DIEs that do not have a name, they are
2601 illegal. Do not emit a complaint at this point, we will
2602 do so when we convert this psymtab into a symtab. */
2604 add_partial_symbol (pdi
, cu
);
2608 if (! pdi
->has_children
)
2611 if (cu
->language
== language_ada
)
2613 pdi
= pdi
->die_child
;
2616 fixup_partial_die (pdi
, cu
);
2617 if (pdi
->tag
== DW_TAG_subprogram
2618 || pdi
->tag
== DW_TAG_lexical_block
)
2619 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2620 pdi
= pdi
->die_sibling
;
2625 /* See if we can figure out if the class lives in a namespace. We do
2626 this by looking for a member function; its demangled name will
2627 contain namespace info, if there is any. */
2630 guess_structure_name (struct partial_die_info
*struct_pdi
,
2631 struct dwarf2_cu
*cu
)
2633 if ((cu
->language
== language_cplus
2634 || cu
->language
== language_java
)
2635 && cu
->has_namespace_info
== 0
2636 && struct_pdi
->has_children
)
2638 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2639 what template types look like, because the demangler
2640 frequently doesn't give the same name as the debug info. We
2641 could fix this by only using the demangled name to get the
2642 prefix (but see comment in read_structure_type). */
2644 struct partial_die_info
*real_pdi
;
2646 /* If this DIE (this DIE's specification, if any) has a parent, then
2647 we should not do this. We'll prepend the parent's fully qualified
2648 name when we create the partial symbol. */
2650 real_pdi
= struct_pdi
;
2651 while (real_pdi
->has_specification
)
2652 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2654 if (real_pdi
->die_parent
!= NULL
)
2659 /* Read a partial die corresponding to an enumeration type. */
2662 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2663 struct dwarf2_cu
*cu
)
2665 struct objfile
*objfile
= cu
->objfile
;
2666 bfd
*abfd
= objfile
->obfd
;
2667 struct partial_die_info
*pdi
;
2669 if (enum_pdi
->name
!= NULL
)
2670 add_partial_symbol (enum_pdi
, cu
);
2672 pdi
= enum_pdi
->die_child
;
2675 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2676 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2678 add_partial_symbol (pdi
, cu
);
2679 pdi
= pdi
->die_sibling
;
2683 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2684 Return the corresponding abbrev, or NULL if the number is zero (indicating
2685 an empty DIE). In either case *BYTES_READ will be set to the length of
2686 the initial number. */
2688 static struct abbrev_info
*
2689 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2690 struct dwarf2_cu
*cu
)
2692 bfd
*abfd
= cu
->objfile
->obfd
;
2693 unsigned int abbrev_number
;
2694 struct abbrev_info
*abbrev
;
2696 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2698 if (abbrev_number
== 0)
2701 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2704 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2705 bfd_get_filename (abfd
));
2711 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2712 Returns a pointer to the end of a series of DIEs, terminated by an empty
2713 DIE. Any children of the skipped DIEs will also be skipped. */
2716 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2718 struct abbrev_info
*abbrev
;
2719 unsigned int bytes_read
;
2723 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2725 return info_ptr
+ bytes_read
;
2727 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2731 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2732 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2733 abbrev corresponding to that skipped uleb128 should be passed in
2734 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2738 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2739 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2741 unsigned int bytes_read
;
2742 struct attribute attr
;
2743 bfd
*abfd
= cu
->objfile
->obfd
;
2744 unsigned int form
, i
;
2746 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2748 /* The only abbrev we care about is DW_AT_sibling. */
2749 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2751 read_attribute (&attr
, &abbrev
->attrs
[i
],
2752 abfd
, info_ptr
, cu
);
2753 if (attr
.form
== DW_FORM_ref_addr
)
2754 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2756 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2759 /* If it isn't DW_AT_sibling, skip this attribute. */
2760 form
= abbrev
->attrs
[i
].form
;
2764 case DW_FORM_ref_addr
:
2765 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
2766 and later it is offset sized. */
2767 if (cu
->header
.version
== 2)
2768 info_ptr
+= cu
->header
.addr_size
;
2770 info_ptr
+= cu
->header
.offset_size
;
2773 info_ptr
+= cu
->header
.addr_size
;
2780 case DW_FORM_flag_present
:
2795 case DW_FORM_string
:
2796 read_string (abfd
, info_ptr
, &bytes_read
);
2797 info_ptr
+= bytes_read
;
2799 case DW_FORM_sec_offset
:
2801 info_ptr
+= cu
->header
.offset_size
;
2803 case DW_FORM_exprloc
:
2805 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2806 info_ptr
+= bytes_read
;
2808 case DW_FORM_block1
:
2809 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2811 case DW_FORM_block2
:
2812 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2814 case DW_FORM_block4
:
2815 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2819 case DW_FORM_ref_udata
:
2820 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2822 case DW_FORM_indirect
:
2823 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2824 info_ptr
+= bytes_read
;
2825 /* We need to continue parsing from here, so just go back to
2827 goto skip_attribute
;
2830 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2831 dwarf_form_name (form
),
2832 bfd_get_filename (abfd
));
2836 if (abbrev
->has_children
)
2837 return skip_children (buffer
, info_ptr
, cu
);
2842 /* Locate ORIG_PDI's sibling.
2843 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2847 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2848 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2849 bfd
*abfd
, struct dwarf2_cu
*cu
)
2851 /* Do we know the sibling already? */
2853 if (orig_pdi
->sibling
)
2854 return orig_pdi
->sibling
;
2856 /* Are there any children to deal with? */
2858 if (!orig_pdi
->has_children
)
2861 /* Skip the children the long way. */
2863 return skip_children (buffer
, info_ptr
, cu
);
2866 /* Expand this partial symbol table into a full symbol table. */
2869 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2871 /* FIXME: This is barely more than a stub. */
2876 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2882 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2883 gdb_flush (gdb_stdout
);
2886 /* Restore our global data. */
2887 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2888 dwarf2_objfile_data_key
);
2890 /* If this psymtab is constructed from a debug-only objfile, the
2891 has_section_at_zero flag will not necessarily be correct. We
2892 can get the correct value for this flag by looking at the data
2893 associated with the (presumably stripped) associated objfile. */
2894 if (pst
->objfile
->separate_debug_objfile_backlink
)
2896 struct dwarf2_per_objfile
*dpo_backlink
2897 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
2898 dwarf2_objfile_data_key
);
2899 dwarf2_per_objfile
->has_section_at_zero
2900 = dpo_backlink
->has_section_at_zero
;
2903 psymtab_to_symtab_1 (pst
);
2905 /* Finish up the debug error message. */
2907 printf_filtered (_("done.\n"));
2912 /* Add PER_CU to the queue. */
2915 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2917 struct dwarf2_queue_item
*item
;
2920 item
= xmalloc (sizeof (*item
));
2921 item
->per_cu
= per_cu
;
2924 if (dwarf2_queue
== NULL
)
2925 dwarf2_queue
= item
;
2927 dwarf2_queue_tail
->next
= item
;
2929 dwarf2_queue_tail
= item
;
2932 /* Process the queue. */
2935 process_queue (struct objfile
*objfile
)
2937 struct dwarf2_queue_item
*item
, *next_item
;
2939 /* The queue starts out with one item, but following a DIE reference
2940 may load a new CU, adding it to the end of the queue. */
2941 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2943 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2944 process_full_comp_unit (item
->per_cu
);
2946 item
->per_cu
->queued
= 0;
2947 next_item
= item
->next
;
2951 dwarf2_queue_tail
= NULL
;
2954 /* Free all allocated queue entries. This function only releases anything if
2955 an error was thrown; if the queue was processed then it would have been
2956 freed as we went along. */
2959 dwarf2_release_queue (void *dummy
)
2961 struct dwarf2_queue_item
*item
, *last
;
2963 item
= dwarf2_queue
;
2966 /* Anything still marked queued is likely to be in an
2967 inconsistent state, so discard it. */
2968 if (item
->per_cu
->queued
)
2970 if (item
->per_cu
->cu
!= NULL
)
2971 free_one_cached_comp_unit (item
->per_cu
->cu
);
2972 item
->per_cu
->queued
= 0;
2980 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2983 /* Read in full symbols for PST, and anything it depends on. */
2986 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2988 struct dwarf2_per_cu_data
*per_cu
;
2989 struct cleanup
*back_to
;
2992 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2993 if (!pst
->dependencies
[i
]->readin
)
2995 /* Inform about additional files that need to be read in. */
2998 /* FIXME: i18n: Need to make this a single string. */
2999 fputs_filtered (" ", gdb_stdout
);
3001 fputs_filtered ("and ", gdb_stdout
);
3003 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
3004 wrap_here (""); /* Flush output */
3005 gdb_flush (gdb_stdout
);
3007 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3010 per_cu
= pst
->read_symtab_private
;
3014 /* It's an include file, no symbols to read for it.
3015 Everything is in the parent symtab. */
3020 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3022 queue_comp_unit (per_cu
, pst
->objfile
);
3024 if (per_cu
->from_debug_types
)
3025 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3027 load_full_comp_unit (per_cu
, pst
->objfile
);
3029 process_queue (pst
->objfile
);
3031 /* Age the cache, releasing compilation units that have not
3032 been used recently. */
3033 age_cached_comp_units ();
3035 do_cleanups (back_to
);
3038 /* Load the DIEs associated with PER_CU into memory. */
3041 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3043 bfd
*abfd
= objfile
->obfd
;
3044 struct dwarf2_cu
*cu
;
3045 unsigned int offset
;
3046 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3047 struct cleanup
*back_to
, *free_cu_cleanup
;
3048 struct attribute
*attr
;
3051 gdb_assert (! per_cu
->from_debug_types
);
3053 /* Set local variables from the partial symbol table info. */
3054 offset
= per_cu
->offset
;
3056 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
3057 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3058 beg_of_comp_unit
= info_ptr
;
3060 cu
= alloc_one_comp_unit (objfile
);
3062 /* If an error occurs while loading, release our storage. */
3063 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3065 /* Read in the comp_unit header. */
3066 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3068 /* Complete the cu_header. */
3069 cu
->header
.offset
= offset
;
3070 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3072 /* Read the abbrevs for this compilation unit. */
3073 dwarf2_read_abbrevs (abfd
, cu
);
3074 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3076 /* Link this compilation unit into the compilation unit tree. */
3078 cu
->per_cu
= per_cu
;
3079 cu
->type_hash
= per_cu
->type_hash
;
3081 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3083 /* We try not to read any attributes in this function, because not
3084 all objfiles needed for references have been loaded yet, and symbol
3085 table processing isn't initialized. But we have to set the CU language,
3086 or we won't be able to build types correctly. */
3087 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3089 set_cu_language (DW_UNSND (attr
), cu
);
3091 set_cu_language (language_minimal
, cu
);
3093 /* Similarly, if we do not read the producer, we can not apply
3094 producer-specific interpretation. */
3095 attr
= dwarf2_attr (cu
->dies
, DW_AT_producer
, cu
);
3097 cu
->producer
= DW_STRING (attr
);
3099 /* Link this CU into read_in_chain. */
3100 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3101 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3103 do_cleanups (back_to
);
3105 /* We've successfully allocated this compilation unit. Let our caller
3106 clean it up when finished with it. */
3107 discard_cleanups (free_cu_cleanup
);
3110 /* Generate full symbol information for PST and CU, whose DIEs have
3111 already been loaded into memory. */
3114 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3116 struct partial_symtab
*pst
= per_cu
->psymtab
;
3117 struct dwarf2_cu
*cu
= per_cu
->cu
;
3118 struct objfile
*objfile
= pst
->objfile
;
3119 bfd
*abfd
= objfile
->obfd
;
3120 CORE_ADDR lowpc
, highpc
;
3121 struct symtab
*symtab
;
3122 struct cleanup
*back_to
;
3125 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3128 back_to
= make_cleanup (really_free_pendings
, NULL
);
3130 cu
->list_in_scope
= &file_symbols
;
3132 dwarf2_find_base_address (cu
->dies
, cu
);
3134 /* Do line number decoding in read_file_scope () */
3135 process_die (cu
->dies
, cu
);
3137 /* Some compilers don't define a DW_AT_high_pc attribute for the
3138 compilation unit. If the DW_AT_high_pc is missing, synthesize
3139 it, by scanning the DIE's below the compilation unit. */
3140 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3142 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3144 /* Set symtab language to language from DW_AT_language.
3145 If the compilation is from a C file generated by language preprocessors,
3146 do not set the language if it was already deduced by start_subfile. */
3148 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3150 symtab
->language
= cu
->language
;
3152 pst
->symtab
= symtab
;
3155 do_cleanups (back_to
);
3158 /* Process a die and its children. */
3161 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3165 case DW_TAG_padding
:
3167 case DW_TAG_compile_unit
:
3168 read_file_scope (die
, cu
);
3170 case DW_TAG_type_unit
:
3171 read_type_unit_scope (die
, cu
);
3173 case DW_TAG_subprogram
:
3174 case DW_TAG_inlined_subroutine
:
3175 read_func_scope (die
, cu
);
3177 case DW_TAG_lexical_block
:
3178 case DW_TAG_try_block
:
3179 case DW_TAG_catch_block
:
3180 read_lexical_block_scope (die
, cu
);
3182 case DW_TAG_class_type
:
3183 case DW_TAG_interface_type
:
3184 case DW_TAG_structure_type
:
3185 case DW_TAG_union_type
:
3186 process_structure_scope (die
, cu
);
3188 case DW_TAG_enumeration_type
:
3189 process_enumeration_scope (die
, cu
);
3192 /* These dies have a type, but processing them does not create
3193 a symbol or recurse to process the children. Therefore we can
3194 read them on-demand through read_type_die. */
3195 case DW_TAG_subroutine_type
:
3196 case DW_TAG_set_type
:
3197 case DW_TAG_array_type
:
3198 case DW_TAG_pointer_type
:
3199 case DW_TAG_ptr_to_member_type
:
3200 case DW_TAG_reference_type
:
3201 case DW_TAG_string_type
:
3204 case DW_TAG_base_type
:
3205 case DW_TAG_subrange_type
:
3206 case DW_TAG_typedef
:
3207 /* Add a typedef symbol for the type definition, if it has a
3209 new_symbol (die
, read_type_die (die
, cu
), cu
);
3211 case DW_TAG_common_block
:
3212 read_common_block (die
, cu
);
3214 case DW_TAG_common_inclusion
:
3216 case DW_TAG_namespace
:
3217 processing_has_namespace_info
= 1;
3218 read_namespace (die
, cu
);
3221 read_module (die
, cu
);
3223 case DW_TAG_imported_declaration
:
3224 case DW_TAG_imported_module
:
3225 processing_has_namespace_info
= 1;
3226 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3227 || cu
->language
!= language_fortran
))
3228 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3229 dwarf_tag_name (die
->tag
));
3230 read_import_statement (die
, cu
);
3233 new_symbol (die
, NULL
, cu
);
3238 /* A helper function for dwarf2_compute_name which determines whether DIE
3239 needs to have the name of the scope prepended to the name listed in the
3243 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
3245 struct attribute
*attr
;
3249 case DW_TAG_namespace
:
3250 case DW_TAG_typedef
:
3251 case DW_TAG_class_type
:
3252 case DW_TAG_interface_type
:
3253 case DW_TAG_structure_type
:
3254 case DW_TAG_union_type
:
3255 case DW_TAG_enumeration_type
:
3256 case DW_TAG_enumerator
:
3257 case DW_TAG_subprogram
:
3261 case DW_TAG_variable
:
3262 /* We only need to prefix "globally" visible variables. These include
3263 any variable marked with DW_AT_external or any variable that
3264 lives in a namespace. [Variables in anonymous namespaces
3265 require prefixing, but they are not DW_AT_external.] */
3267 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
3269 struct dwarf2_cu
*spec_cu
= cu
;
3270 return die_needs_namespace (die_specification (die
, &spec_cu
),
3274 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
3275 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
)
3277 /* A variable in a lexical block of some kind does not need a
3278 namespace, even though in C++ such variables may be external
3279 and have a mangled name. */
3280 if (die
->parent
->tag
== DW_TAG_lexical_block
3281 || die
->parent
->tag
== DW_TAG_try_block
3282 || die
->parent
->tag
== DW_TAG_catch_block
3283 || die
->parent
->tag
== DW_TAG_subprogram
)
3292 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
3293 compute the physname for the object, which include a method's
3294 formal parameters (C++/Java) and return type (Java).
3296 For Ada, return the DIE's linkage name rather than the fully qualified
3297 name. PHYSNAME is ignored..
3299 The result is allocated on the objfile_obstack and canonicalized. */
3302 dwarf2_compute_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
,
3306 name
= dwarf2_name (die
, cu
);
3308 /* These are the only languages we know how to qualify names in. */
3310 && (cu
->language
== language_cplus
|| cu
->language
== language_java
))
3312 if (die_needs_namespace (die
, cu
))
3316 struct ui_file
*buf
;
3318 prefix
= determine_prefix (die
, cu
);
3319 buf
= mem_fileopen ();
3320 if (*prefix
!= '\0')
3322 char *prefixed_name
= typename_concat (NULL
, prefix
, name
, cu
);
3323 fputs_unfiltered (prefixed_name
, buf
);
3324 xfree (prefixed_name
);
3327 fputs_unfiltered (name
? name
: "", buf
);
3329 /* For Java and C++ methods, append formal parameter type
3330 information, if PHYSNAME. */
3332 if (physname
&& die
->tag
== DW_TAG_subprogram
3333 && (cu
->language
== language_cplus
3334 || cu
->language
== language_java
))
3336 struct type
*type
= read_type_die (die
, cu
);
3338 c_type_print_args (type
, buf
, 0, cu
->language
);
3340 if (cu
->language
== language_java
)
3342 /* For java, we must append the return type to method
3344 if (die
->tag
== DW_TAG_subprogram
)
3345 java_print_type (TYPE_TARGET_TYPE (type
), "", buf
,
3348 else if (cu
->language
== language_cplus
)
3350 if (TYPE_NFIELDS (type
) > 0
3351 && TYPE_FIELD_ARTIFICIAL (type
, 0)
3352 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
, 0))))
3353 fputs_unfiltered (" const", buf
);
3357 name
= ui_file_obsavestring (buf
, &cu
->objfile
->objfile_obstack
,
3359 ui_file_delete (buf
);
3361 if (cu
->language
== language_cplus
)
3364 = dwarf2_canonicalize_name (name
, cu
,
3365 &cu
->objfile
->objfile_obstack
);
3371 else if (cu
->language
== language_ada
)
3373 /* For Ada unit, we prefer the linkage name over the name, as
3374 the former contains the exported name, which the user expects
3375 to be able to reference. Ideally, we want the user to be able
3376 to reference this entity using either natural or linkage name,
3377 but we haven't started looking at this enhancement yet. */
3378 struct attribute
*attr
;
3380 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
3382 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
3383 if (attr
&& DW_STRING (attr
))
3384 name
= DW_STRING (attr
);
3390 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3391 If scope qualifiers are appropriate they will be added. The result
3392 will be allocated on the objfile_obstack, or NULL if the DIE does
3393 not have a name. NAME may either be from a previous call to
3394 dwarf2_name or NULL.
3396 The output string will be canonicalized (if C++/Java). */
3399 dwarf2_full_name (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3401 return dwarf2_compute_name (name
, die
, cu
, 0);
3404 /* Construct a physname for the given DIE in CU. NAME may either be
3405 from a previous call to dwarf2_name or NULL. The result will be
3406 allocated on the objfile_objstack or NULL if the DIE does not have a
3409 The output string will be canonicalized (if C++/Java). */
3412 dwarf2_physname (char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
3414 return dwarf2_compute_name (name
, die
, cu
, 1);
3417 /* Read the import statement specified by the given die and record it. */
3420 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3422 struct attribute
*import_attr
;
3423 struct die_info
*imported_die
;
3424 struct dwarf2_cu
*imported_cu
;
3425 const char *imported_name
;
3426 const char *imported_name_prefix
;
3427 const char *canonical_name
;
3428 const char *import_alias
;
3429 const char *imported_declaration
= NULL
;
3430 const char *import_prefix
;
3434 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3435 if (import_attr
== NULL
)
3437 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3438 dwarf_tag_name (die
->tag
));
3443 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3444 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3445 if (imported_name
== NULL
)
3447 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3449 The import in the following code:
3463 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3464 <52> DW_AT_decl_file : 1
3465 <53> DW_AT_decl_line : 6
3466 <54> DW_AT_import : <0x75>
3467 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3469 <5b> DW_AT_decl_file : 1
3470 <5c> DW_AT_decl_line : 2
3471 <5d> DW_AT_type : <0x6e>
3473 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3474 <76> DW_AT_byte_size : 4
3475 <77> DW_AT_encoding : 5 (signed)
3477 imports the wrong die ( 0x75 instead of 0x58 ).
3478 This case will be ignored until the gcc bug is fixed. */
3482 /* Figure out the local name after import. */
3483 import_alias
= dwarf2_name (die
, cu
);
3485 /* Figure out where the statement is being imported to. */
3486 import_prefix
= determine_prefix (die
, cu
);
3488 /* Figure out what the scope of the imported die is and prepend it
3489 to the name of the imported die. */
3490 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3492 if (imported_die
->tag
!= DW_TAG_namespace
)
3494 imported_declaration
= imported_name
;
3495 canonical_name
= imported_name_prefix
;
3497 else if (strlen (imported_name_prefix
) > 0)
3499 temp
= alloca (strlen (imported_name_prefix
)
3500 + 2 + strlen (imported_name
) + 1);
3501 strcpy (temp
, imported_name_prefix
);
3502 strcat (temp
, "::");
3503 strcat (temp
, imported_name
);
3504 canonical_name
= temp
;
3507 canonical_name
= imported_name
;
3509 cp_add_using_directive (import_prefix
,
3512 imported_declaration
,
3513 &cu
->objfile
->objfile_obstack
);
3517 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3519 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3523 free_cu_line_header (void *arg
)
3525 struct dwarf2_cu
*cu
= arg
;
3527 free_line_header (cu
->line_header
);
3528 cu
->line_header
= NULL
;
3532 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3534 struct objfile
*objfile
= cu
->objfile
;
3535 struct comp_unit_head
*cu_header
= &cu
->header
;
3536 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3537 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3538 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3539 struct attribute
*attr
;
3541 char *comp_dir
= NULL
;
3542 struct die_info
*child_die
;
3543 bfd
*abfd
= objfile
->obfd
;
3544 struct line_header
*line_header
= 0;
3547 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3549 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3551 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3552 from finish_block. */
3553 if (lowpc
== ((CORE_ADDR
) -1))
3558 /* Find the filename. Do not use dwarf2_name here, since the filename
3559 is not a source language identifier. */
3560 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3563 name
= DW_STRING (attr
);
3566 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3568 comp_dir
= DW_STRING (attr
);
3569 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3571 comp_dir
= ldirname (name
);
3572 if (comp_dir
!= NULL
)
3573 make_cleanup (xfree
, comp_dir
);
3575 if (comp_dir
!= NULL
)
3577 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3578 directory, get rid of it. */
3579 char *cp
= strchr (comp_dir
, ':');
3581 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3588 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3591 set_cu_language (DW_UNSND (attr
), cu
);
3594 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3596 cu
->producer
= DW_STRING (attr
);
3598 /* We assume that we're processing GCC output. */
3599 processing_gcc_compilation
= 2;
3601 processing_has_namespace_info
= 0;
3603 start_symtab (name
, comp_dir
, lowpc
);
3604 record_debugformat ("DWARF 2");
3605 record_producer (cu
->producer
);
3607 initialize_cu_func_list (cu
);
3609 /* Decode line number information if present. We do this before
3610 processing child DIEs, so that the line header table is available
3611 for DW_AT_decl_file. */
3612 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3615 unsigned int line_offset
= DW_UNSND (attr
);
3616 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3619 cu
->line_header
= line_header
;
3620 make_cleanup (free_cu_line_header
, cu
);
3621 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3625 /* Process all dies in compilation unit. */
3626 if (die
->child
!= NULL
)
3628 child_die
= die
->child
;
3629 while (child_die
&& child_die
->tag
)
3631 process_die (child_die
, cu
);
3632 child_die
= sibling_die (child_die
);
3636 /* Decode macro information, if present. Dwarf 2 macro information
3637 refers to information in the line number info statement program
3638 header, so we can only read it if we've read the header
3640 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3641 if (attr
&& line_header
)
3643 unsigned int macro_offset
= DW_UNSND (attr
);
3644 dwarf_decode_macros (line_header
, macro_offset
,
3645 comp_dir
, abfd
, cu
);
3647 do_cleanups (back_to
);
3650 /* For TUs we want to skip the first top level sibling if it's not the
3651 actual type being defined by this TU. In this case the first top
3652 level sibling is there to provide context only. */
3655 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3657 struct objfile
*objfile
= cu
->objfile
;
3658 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3660 struct attribute
*attr
;
3662 char *comp_dir
= NULL
;
3663 struct die_info
*child_die
;
3664 bfd
*abfd
= objfile
->obfd
;
3665 struct line_header
*line_header
= 0;
3667 /* start_symtab needs a low pc, but we don't really have one.
3668 Do what read_file_scope would do in the absence of such info. */
3669 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3671 /* Find the filename. Do not use dwarf2_name here, since the filename
3672 is not a source language identifier. */
3673 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3675 name
= DW_STRING (attr
);
3677 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3679 comp_dir
= DW_STRING (attr
);
3680 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3682 comp_dir
= ldirname (name
);
3683 if (comp_dir
!= NULL
)
3684 make_cleanup (xfree
, comp_dir
);
3690 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3692 set_cu_language (DW_UNSND (attr
), cu
);
3694 /* This isn't technically needed today. It is done for symmetry
3695 with read_file_scope. */
3696 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3698 cu
->producer
= DW_STRING (attr
);
3700 /* We assume that we're processing GCC output. */
3701 processing_gcc_compilation
= 2;
3703 processing_has_namespace_info
= 0;
3705 start_symtab (name
, comp_dir
, lowpc
);
3706 record_debugformat ("DWARF 2");
3707 record_producer (cu
->producer
);
3709 /* Process the dies in the type unit. */
3710 if (die
->child
== NULL
)
3712 dump_die_for_error (die
);
3713 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3714 bfd_get_filename (abfd
));
3717 child_die
= die
->child
;
3719 while (child_die
&& child_die
->tag
)
3721 process_die (child_die
, cu
);
3723 child_die
= sibling_die (child_die
);
3726 do_cleanups (back_to
);
3730 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3731 struct dwarf2_cu
*cu
)
3733 struct function_range
*thisfn
;
3735 thisfn
= (struct function_range
*)
3736 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3737 thisfn
->name
= name
;
3738 thisfn
->lowpc
= lowpc
;
3739 thisfn
->highpc
= highpc
;
3740 thisfn
->seen_line
= 0;
3741 thisfn
->next
= NULL
;
3743 if (cu
->last_fn
== NULL
)
3744 cu
->first_fn
= thisfn
;
3746 cu
->last_fn
->next
= thisfn
;
3748 cu
->last_fn
= thisfn
;
3751 /* qsort helper for inherit_abstract_dies. */
3754 unsigned_int_compar (const void *ap
, const void *bp
)
3756 unsigned int a
= *(unsigned int *) ap
;
3757 unsigned int b
= *(unsigned int *) bp
;
3759 return (a
> b
) - (b
> a
);
3762 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3763 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3764 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3767 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3769 struct die_info
*child_die
;
3770 unsigned die_children_count
;
3771 /* CU offsets which were referenced by children of the current DIE. */
3773 unsigned *offsets_end
, *offsetp
;
3774 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3775 struct die_info
*origin_die
;
3776 /* Iterator of the ORIGIN_DIE children. */
3777 struct die_info
*origin_child_die
;
3778 struct cleanup
*cleanups
;
3779 struct attribute
*attr
;
3781 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3785 origin_die
= follow_die_ref (die
, attr
, &cu
);
3786 if (die
->tag
!= origin_die
->tag
3787 && !(die
->tag
== DW_TAG_inlined_subroutine
3788 && origin_die
->tag
== DW_TAG_subprogram
))
3789 complaint (&symfile_complaints
,
3790 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3791 die
->offset
, origin_die
->offset
);
3793 child_die
= die
->child
;
3794 die_children_count
= 0;
3795 while (child_die
&& child_die
->tag
)
3797 child_die
= sibling_die (child_die
);
3798 die_children_count
++;
3800 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3801 cleanups
= make_cleanup (xfree
, offsets
);
3803 offsets_end
= offsets
;
3804 child_die
= die
->child
;
3805 while (child_die
&& child_die
->tag
)
3807 /* For each CHILD_DIE, find the corresponding child of
3808 ORIGIN_DIE. If there is more than one layer of
3809 DW_AT_abstract_origin, follow them all; there shouldn't be,
3810 but GCC versions at least through 4.4 generate this (GCC PR
3812 struct die_info
*child_origin_die
= child_die
;
3815 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3818 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3821 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3822 counterpart may exist. */
3823 if (child_origin_die
!= child_die
)
3825 if (child_die
->tag
!= child_origin_die
->tag
3826 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3827 && child_origin_die
->tag
== DW_TAG_subprogram
))
3828 complaint (&symfile_complaints
,
3829 _("Child DIE 0x%x and its abstract origin 0x%x have "
3830 "different tags"), child_die
->offset
,
3831 child_origin_die
->offset
);
3832 if (child_origin_die
->parent
!= origin_die
)
3833 complaint (&symfile_complaints
,
3834 _("Child DIE 0x%x and its abstract origin 0x%x have "
3835 "different parents"), child_die
->offset
,
3836 child_origin_die
->offset
);
3838 *offsets_end
++ = child_origin_die
->offset
;
3840 child_die
= sibling_die (child_die
);
3842 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3843 unsigned_int_compar
);
3844 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3845 if (offsetp
[-1] == *offsetp
)
3846 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3847 "to DIE 0x%x as their abstract origin"),
3848 die
->offset
, *offsetp
);
3851 origin_child_die
= origin_die
->child
;
3852 while (origin_child_die
&& origin_child_die
->tag
)
3854 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3855 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3857 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3859 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3860 process_die (origin_child_die
, cu
);
3862 origin_child_die
= sibling_die (origin_child_die
);
3865 do_cleanups (cleanups
);
3869 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3871 struct objfile
*objfile
= cu
->objfile
;
3872 struct context_stack
*new;
3875 struct die_info
*child_die
;
3876 struct attribute
*attr
, *call_line
, *call_file
;
3879 struct block
*block
;
3880 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3884 /* If we do not have call site information, we can't show the
3885 caller of this inlined function. That's too confusing, so
3886 only use the scope for local variables. */
3887 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3888 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3889 if (call_line
== NULL
|| call_file
== NULL
)
3891 read_lexical_block_scope (die
, cu
);
3896 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3898 name
= dwarf2_name (die
, cu
);
3900 /* Ignore functions with missing or empty names. These are actually
3901 illegal according to the DWARF standard. */
3904 complaint (&symfile_complaints
,
3905 _("missing name for subprogram DIE at %d"), die
->offset
);
3909 /* Ignore functions with missing or invalid low and high pc attributes. */
3910 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3912 complaint (&symfile_complaints
,
3913 _("cannot get low and high bounds for subprogram DIE at %d"),
3921 /* Record the function range for dwarf_decode_lines. */
3922 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3924 new = push_context (0, lowpc
);
3925 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3927 /* If there is a location expression for DW_AT_frame_base, record
3929 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3931 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3932 expression is being recorded directly in the function's symbol
3933 and not in a separate frame-base object. I guess this hack is
3934 to avoid adding some sort of frame-base adjunct/annex to the
3935 function's symbol :-(. The problem with doing this is that it
3936 results in a function symbol with a location expression that
3937 has nothing to do with the location of the function, ouch! The
3938 relationship should be: a function's symbol has-a frame base; a
3939 frame-base has-a location expression. */
3940 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3942 cu
->list_in_scope
= &local_symbols
;
3944 if (die
->child
!= NULL
)
3946 child_die
= die
->child
;
3947 while (child_die
&& child_die
->tag
)
3949 process_die (child_die
, cu
);
3950 child_die
= sibling_die (child_die
);
3954 inherit_abstract_dies (die
, cu
);
3956 /* If we have a DW_AT_specification, we might need to import using
3957 directives from the context of the specification DIE. See the
3958 comment in determine_prefix. */
3959 if (cu
->language
== language_cplus
3960 && dwarf2_attr (die
, DW_AT_specification
, cu
))
3962 struct dwarf2_cu
*spec_cu
= cu
;
3963 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
3967 child_die
= spec_die
->child
;
3968 while (child_die
&& child_die
->tag
)
3970 if (child_die
->tag
== DW_TAG_imported_module
)
3971 process_die (child_die
, spec_cu
);
3972 child_die
= sibling_die (child_die
);
3975 /* In some cases, GCC generates specification DIEs that
3976 themselves contain DW_AT_specification attributes. */
3977 spec_die
= die_specification (spec_die
, &spec_cu
);
3981 new = pop_context ();
3982 /* Make a block for the local symbols within. */
3983 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3984 lowpc
, highpc
, objfile
);
3986 /* For C++, set the block's scope. */
3987 if (cu
->language
== language_cplus
)
3988 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3989 determine_prefix (die
, cu
),
3990 processing_has_namespace_info
);
3992 /* If we have address ranges, record them. */
3993 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3995 /* In C++, we can have functions nested inside functions (e.g., when
3996 a function declares a class that has methods). This means that
3997 when we finish processing a function scope, we may need to go
3998 back to building a containing block's symbol lists. */
3999 local_symbols
= new->locals
;
4000 param_symbols
= new->params
;
4001 using_directives
= new->using_directives
;
4003 /* If we've finished processing a top-level function, subsequent
4004 symbols go in the file symbol list. */
4005 if (outermost_context_p ())
4006 cu
->list_in_scope
= &file_symbols
;
4009 /* Process all the DIES contained within a lexical block scope. Start
4010 a new scope, process the dies, and then close the scope. */
4013 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4015 struct objfile
*objfile
= cu
->objfile
;
4016 struct context_stack
*new;
4017 CORE_ADDR lowpc
, highpc
;
4018 struct die_info
*child_die
;
4021 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4023 /* Ignore blocks with missing or invalid low and high pc attributes. */
4024 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
4025 as multiple lexical blocks? Handling children in a sane way would
4026 be nasty. Might be easier to properly extend generic blocks to
4028 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
4033 push_context (0, lowpc
);
4034 if (die
->child
!= NULL
)
4036 child_die
= die
->child
;
4037 while (child_die
&& child_die
->tag
)
4039 process_die (child_die
, cu
);
4040 child_die
= sibling_die (child_die
);
4043 new = pop_context ();
4045 if (local_symbols
!= NULL
|| using_directives
!= NULL
)
4048 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
4051 /* Note that recording ranges after traversing children, as we
4052 do here, means that recording a parent's ranges entails
4053 walking across all its children's ranges as they appear in
4054 the address map, which is quadratic behavior.
4056 It would be nicer to record the parent's ranges before
4057 traversing its children, simply overriding whatever you find
4058 there. But since we don't even decide whether to create a
4059 block until after we've traversed its children, that's hard
4061 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
4063 local_symbols
= new->locals
;
4064 using_directives
= new->using_directives
;
4067 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
4068 Return 1 if the attributes are present and valid, otherwise, return 0.
4069 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
4072 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
4073 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
4074 struct partial_symtab
*ranges_pst
)
4076 struct objfile
*objfile
= cu
->objfile
;
4077 struct comp_unit_head
*cu_header
= &cu
->header
;
4078 bfd
*obfd
= objfile
->obfd
;
4079 unsigned int addr_size
= cu_header
->addr_size
;
4080 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4081 /* Base address selection entry. */
4092 found_base
= cu
->base_known
;
4093 base
= cu
->base_address
;
4095 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
4096 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4098 complaint (&symfile_complaints
,
4099 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4103 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4105 /* Read in the largest possible address. */
4106 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4107 if ((marker
& mask
) == mask
)
4109 /* If we found the largest possible address, then
4110 read the base address. */
4111 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4112 buffer
+= 2 * addr_size
;
4113 offset
+= 2 * addr_size
;
4119 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4123 CORE_ADDR range_beginning
, range_end
;
4125 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4126 buffer
+= addr_size
;
4127 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4128 buffer
+= addr_size
;
4129 offset
+= 2 * addr_size
;
4131 /* An end of list marker is a pair of zero addresses. */
4132 if (range_beginning
== 0 && range_end
== 0)
4133 /* Found the end of list entry. */
4136 /* Each base address selection entry is a pair of 2 values.
4137 The first is the largest possible address, the second is
4138 the base address. Check for a base address here. */
4139 if ((range_beginning
& 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
);
4150 /* We have no valid base address for the ranges
4152 complaint (&symfile_complaints
,
4153 _("Invalid .debug_ranges data (no base address)"));
4157 range_beginning
+= base
;
4160 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4161 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4162 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4165 /* FIXME: This is recording everything as a low-high
4166 segment of consecutive addresses. We should have a
4167 data structure for discontiguous block ranges
4171 low
= range_beginning
;
4177 if (range_beginning
< low
)
4178 low
= range_beginning
;
4179 if (range_end
> high
)
4185 /* If the first entry is an end-of-list marker, the range
4186 describes an empty scope, i.e. no instructions. */
4192 *high_return
= high
;
4196 /* Get low and high pc attributes from a die. Return 1 if the attributes
4197 are present and valid, otherwise, return 0. Return -1 if the range is
4198 discontinuous, i.e. derived from DW_AT_ranges information. */
4200 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4201 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4202 struct partial_symtab
*pst
)
4204 struct attribute
*attr
;
4209 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4212 high
= DW_ADDR (attr
);
4213 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4215 low
= DW_ADDR (attr
);
4217 /* Found high w/o low attribute. */
4220 /* Found consecutive range of addresses. */
4225 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4228 /* Value of the DW_AT_ranges attribute is the offset in the
4229 .debug_ranges section. */
4230 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4232 /* Found discontinuous range of addresses. */
4240 /* When using the GNU linker, .gnu.linkonce. sections are used to
4241 eliminate duplicate copies of functions and vtables and such.
4242 The linker will arbitrarily choose one and discard the others.
4243 The AT_*_pc values for such functions refer to local labels in
4244 these sections. If the section from that file was discarded, the
4245 labels are not in the output, so the relocs get a value of 0.
4246 If this is a discarded function, mark the pc bounds as invalid,
4247 so that GDB will ignore it. */
4248 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4256 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4257 its low and high PC addresses. Do nothing if these addresses could not
4258 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4259 and HIGHPC to the high address if greater than HIGHPC. */
4262 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4263 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4264 struct dwarf2_cu
*cu
)
4266 CORE_ADDR low
, high
;
4267 struct die_info
*child
= die
->child
;
4269 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4271 *lowpc
= min (*lowpc
, low
);
4272 *highpc
= max (*highpc
, high
);
4275 /* If the language does not allow nested subprograms (either inside
4276 subprograms or lexical blocks), we're done. */
4277 if (cu
->language
!= language_ada
)
4280 /* Check all the children of the given DIE. If it contains nested
4281 subprograms, then check their pc bounds. Likewise, we need to
4282 check lexical blocks as well, as they may also contain subprogram
4284 while (child
&& child
->tag
)
4286 if (child
->tag
== DW_TAG_subprogram
4287 || child
->tag
== DW_TAG_lexical_block
)
4288 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4289 child
= sibling_die (child
);
4293 /* Get the low and high pc's represented by the scope DIE, and store
4294 them in *LOWPC and *HIGHPC. If the correct values can't be
4295 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4298 get_scope_pc_bounds (struct die_info
*die
,
4299 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4300 struct dwarf2_cu
*cu
)
4302 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4303 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4304 CORE_ADDR current_low
, current_high
;
4306 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4308 best_low
= current_low
;
4309 best_high
= current_high
;
4313 struct die_info
*child
= die
->child
;
4315 while (child
&& child
->tag
)
4317 switch (child
->tag
) {
4318 case DW_TAG_subprogram
:
4319 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4321 case DW_TAG_namespace
:
4322 /* FIXME: carlton/2004-01-16: Should we do this for
4323 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4324 that current GCC's always emit the DIEs corresponding
4325 to definitions of methods of classes as children of a
4326 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4327 the DIEs giving the declarations, which could be
4328 anywhere). But I don't see any reason why the
4329 standards says that they have to be there. */
4330 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4332 if (current_low
!= ((CORE_ADDR
) -1))
4334 best_low
= min (best_low
, current_low
);
4335 best_high
= max (best_high
, current_high
);
4343 child
= sibling_die (child
);
4348 *highpc
= best_high
;
4351 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4354 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4355 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4357 struct attribute
*attr
;
4359 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4362 CORE_ADDR high
= DW_ADDR (attr
);
4363 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4366 CORE_ADDR low
= DW_ADDR (attr
);
4367 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4371 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4374 bfd
*obfd
= cu
->objfile
->obfd
;
4376 /* The value of the DW_AT_ranges attribute is the offset of the
4377 address range list in the .debug_ranges section. */
4378 unsigned long offset
= DW_UNSND (attr
);
4379 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4381 /* For some target architectures, but not others, the
4382 read_address function sign-extends the addresses it returns.
4383 To recognize base address selection entries, we need a
4385 unsigned int addr_size
= cu
->header
.addr_size
;
4386 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4388 /* The base address, to which the next pair is relative. Note
4389 that this 'base' is a DWARF concept: most entries in a range
4390 list are relative, to reduce the number of relocs against the
4391 debugging information. This is separate from this function's
4392 'baseaddr' argument, which GDB uses to relocate debugging
4393 information from a shared library based on the address at
4394 which the library was loaded. */
4395 CORE_ADDR base
= cu
->base_address
;
4396 int base_known
= cu
->base_known
;
4398 gdb_assert (dwarf2_per_objfile
->ranges
.readin
);
4399 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4401 complaint (&symfile_complaints
,
4402 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4409 unsigned int bytes_read
;
4410 CORE_ADDR start
, end
;
4412 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4413 buffer
+= bytes_read
;
4414 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4415 buffer
+= bytes_read
;
4417 /* Did we find the end of the range list? */
4418 if (start
== 0 && end
== 0)
4421 /* Did we find a base address selection entry? */
4422 else if ((start
& base_select_mask
) == base_select_mask
)
4428 /* We found an ordinary address range. */
4433 complaint (&symfile_complaints
,
4434 _("Invalid .debug_ranges data (no base address)"));
4438 record_block_range (block
,
4439 baseaddr
+ base
+ start
,
4440 baseaddr
+ base
+ end
- 1);
4446 /* Add an aggregate field to the field list. */
4449 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4450 struct dwarf2_cu
*cu
)
4452 struct objfile
*objfile
= cu
->objfile
;
4453 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4454 struct nextfield
*new_field
;
4455 struct attribute
*attr
;
4457 char *fieldname
= "";
4459 /* Allocate a new field list entry and link it in. */
4460 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4461 make_cleanup (xfree
, new_field
);
4462 memset (new_field
, 0, sizeof (struct nextfield
));
4464 if (die
->tag
== DW_TAG_inheritance
)
4466 new_field
->next
= fip
->baseclasses
;
4467 fip
->baseclasses
= new_field
;
4471 new_field
->next
= fip
->fields
;
4472 fip
->fields
= new_field
;
4476 /* Handle accessibility and virtuality of field.
4477 The default accessibility for members is public, the default
4478 accessibility for inheritance is private. */
4479 if (die
->tag
!= DW_TAG_inheritance
)
4480 new_field
->accessibility
= DW_ACCESS_public
;
4482 new_field
->accessibility
= DW_ACCESS_private
;
4483 new_field
->virtuality
= DW_VIRTUALITY_none
;
4485 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4487 new_field
->accessibility
= DW_UNSND (attr
);
4488 if (new_field
->accessibility
!= DW_ACCESS_public
)
4489 fip
->non_public_fields
= 1;
4490 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4492 new_field
->virtuality
= DW_UNSND (attr
);
4494 fp
= &new_field
->field
;
4496 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4498 /* Data member other than a C++ static data member. */
4500 /* Get type of field. */
4501 fp
->type
= die_type (die
, cu
);
4503 SET_FIELD_BITPOS (*fp
, 0);
4505 /* Get bit size of field (zero if none). */
4506 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4509 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4513 FIELD_BITSIZE (*fp
) = 0;
4516 /* Get bit offset of field. */
4517 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4520 int byte_offset
= 0;
4522 if (attr_form_is_section_offset (attr
))
4523 dwarf2_complex_location_expr_complaint ();
4524 else if (attr_form_is_constant (attr
))
4525 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4526 else if (attr_form_is_block (attr
))
4527 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4529 dwarf2_complex_location_expr_complaint ();
4531 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4533 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4536 if (gdbarch_bits_big_endian (gdbarch
))
4538 /* For big endian bits, the DW_AT_bit_offset gives the
4539 additional bit offset from the MSB of the containing
4540 anonymous object to the MSB of the field. We don't
4541 have to do anything special since we don't need to
4542 know the size of the anonymous object. */
4543 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4547 /* For little endian bits, compute the bit offset to the
4548 MSB of the anonymous object, subtract off the number of
4549 bits from the MSB of the field to the MSB of the
4550 object, and then subtract off the number of bits of
4551 the field itself. The result is the bit offset of
4552 the LSB of the field. */
4554 int bit_offset
= DW_UNSND (attr
);
4556 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4559 /* The size of the anonymous object containing
4560 the bit field is explicit, so use the
4561 indicated size (in bytes). */
4562 anonymous_size
= DW_UNSND (attr
);
4566 /* The size of the anonymous object containing
4567 the bit field must be inferred from the type
4568 attribute of the data member containing the
4570 anonymous_size
= TYPE_LENGTH (fp
->type
);
4572 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4573 - bit_offset
- FIELD_BITSIZE (*fp
);
4577 /* Get name of field. */
4578 fieldname
= dwarf2_name (die
, cu
);
4579 if (fieldname
== NULL
)
4582 /* The name is already allocated along with this objfile, so we don't
4583 need to duplicate it for the type. */
4584 fp
->name
= fieldname
;
4586 /* Change accessibility for artificial fields (e.g. virtual table
4587 pointer or virtual base class pointer) to private. */
4588 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4590 FIELD_ARTIFICIAL (*fp
) = 1;
4591 new_field
->accessibility
= DW_ACCESS_private
;
4592 fip
->non_public_fields
= 1;
4595 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4597 /* C++ static member. */
4599 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4600 is a declaration, but all versions of G++ as of this writing
4601 (so through at least 3.2.1) incorrectly generate
4602 DW_TAG_variable tags. */
4606 /* Get name of field. */
4607 fieldname
= dwarf2_name (die
, cu
);
4608 if (fieldname
== NULL
)
4611 /* Get physical name. */
4612 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4614 /* The name is already allocated along with this objfile, so we don't
4615 need to duplicate it for the type. */
4616 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4617 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4618 FIELD_NAME (*fp
) = fieldname
;
4620 else if (die
->tag
== DW_TAG_inheritance
)
4622 /* C++ base class field. */
4623 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4626 int byte_offset
= 0;
4628 if (attr_form_is_section_offset (attr
))
4629 dwarf2_complex_location_expr_complaint ();
4630 else if (attr_form_is_constant (attr
))
4631 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4632 else if (attr_form_is_block (attr
))
4633 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4635 dwarf2_complex_location_expr_complaint ();
4637 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4639 FIELD_BITSIZE (*fp
) = 0;
4640 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4641 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4642 fip
->nbaseclasses
++;
4646 /* Create the vector of fields, and attach it to the type. */
4649 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4650 struct dwarf2_cu
*cu
)
4652 int nfields
= fip
->nfields
;
4654 /* Record the field count, allocate space for the array of fields,
4655 and create blank accessibility bitfields if necessary. */
4656 TYPE_NFIELDS (type
) = nfields
;
4657 TYPE_FIELDS (type
) = (struct field
*)
4658 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4659 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4661 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
4663 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4665 TYPE_FIELD_PRIVATE_BITS (type
) =
4666 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4667 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4669 TYPE_FIELD_PROTECTED_BITS (type
) =
4670 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4671 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4673 TYPE_FIELD_IGNORE_BITS (type
) =
4674 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4675 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4678 /* If the type has baseclasses, allocate and clear a bit vector for
4679 TYPE_FIELD_VIRTUAL_BITS. */
4680 if (fip
->nbaseclasses
&& cu
->language
!= language_ada
)
4682 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4683 unsigned char *pointer
;
4685 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4686 pointer
= TYPE_ALLOC (type
, num_bytes
);
4687 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4688 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4689 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4692 /* Copy the saved-up fields into the field vector. Start from the head
4693 of the list, adding to the tail of the field array, so that they end
4694 up in the same order in the array in which they were added to the list. */
4695 while (nfields
-- > 0)
4697 struct nextfield
*fieldp
;
4701 fieldp
= fip
->fields
;
4702 fip
->fields
= fieldp
->next
;
4706 fieldp
= fip
->baseclasses
;
4707 fip
->baseclasses
= fieldp
->next
;
4710 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4711 switch (fieldp
->accessibility
)
4713 case DW_ACCESS_private
:
4714 if (cu
->language
!= language_ada
)
4715 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4718 case DW_ACCESS_protected
:
4719 if (cu
->language
!= language_ada
)
4720 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4723 case DW_ACCESS_public
:
4727 /* Unknown accessibility. Complain and treat it as public. */
4729 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4730 fieldp
->accessibility
);
4734 if (nfields
< fip
->nbaseclasses
)
4736 switch (fieldp
->virtuality
)
4738 case DW_VIRTUALITY_virtual
:
4739 case DW_VIRTUALITY_pure_virtual
:
4740 if (cu
->language
== language_ada
)
4741 error ("unexpected virtuality in component of Ada type");
4742 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4749 /* Add a member function to the proper fieldlist. */
4752 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4753 struct type
*type
, struct dwarf2_cu
*cu
)
4755 struct objfile
*objfile
= cu
->objfile
;
4756 struct attribute
*attr
;
4757 struct fnfieldlist
*flp
;
4759 struct fn_field
*fnp
;
4762 struct nextfnfield
*new_fnfield
;
4763 struct type
*this_type
;
4765 if (cu
->language
== language_ada
)
4766 error ("unexpected member function in Ada type");
4768 /* Get name of member function. */
4769 fieldname
= dwarf2_name (die
, cu
);
4770 if (fieldname
== NULL
)
4773 /* Get the mangled name. */
4774 physname
= (char *) dwarf2_physname (fieldname
, die
, cu
);
4776 /* Look up member function name in fieldlist. */
4777 for (i
= 0; i
< fip
->nfnfields
; i
++)
4779 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4783 /* Create new list element if necessary. */
4784 if (i
< fip
->nfnfields
)
4785 flp
= &fip
->fnfieldlists
[i
];
4788 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4790 fip
->fnfieldlists
= (struct fnfieldlist
*)
4791 xrealloc (fip
->fnfieldlists
,
4792 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4793 * sizeof (struct fnfieldlist
));
4794 if (fip
->nfnfields
== 0)
4795 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4797 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4798 flp
->name
= fieldname
;
4804 /* Create a new member function field and chain it to the field list
4806 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4807 make_cleanup (xfree
, new_fnfield
);
4808 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4809 new_fnfield
->next
= flp
->head
;
4810 flp
->head
= new_fnfield
;
4813 /* Fill in the member function field info. */
4814 fnp
= &new_fnfield
->fnfield
;
4815 /* The name is already allocated along with this objfile, so we don't
4816 need to duplicate it for the type. */
4817 fnp
->physname
= physname
? physname
: "";
4818 fnp
->type
= alloc_type (objfile
);
4819 this_type
= read_type_die (die
, cu
);
4820 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4822 int nparams
= TYPE_NFIELDS (this_type
);
4824 /* TYPE is the domain of this method, and THIS_TYPE is the type
4825 of the method itself (TYPE_CODE_METHOD). */
4826 smash_to_method_type (fnp
->type
, type
,
4827 TYPE_TARGET_TYPE (this_type
),
4828 TYPE_FIELDS (this_type
),
4829 TYPE_NFIELDS (this_type
),
4830 TYPE_VARARGS (this_type
));
4832 /* Handle static member functions.
4833 Dwarf2 has no clean way to discern C++ static and non-static
4834 member functions. G++ helps GDB by marking the first
4835 parameter for non-static member functions (which is the
4836 this pointer) as artificial. We obtain this information
4837 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4838 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4839 fnp
->voffset
= VOFFSET_STATIC
;
4842 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4845 /* Get fcontext from DW_AT_containing_type if present. */
4846 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4847 fnp
->fcontext
= die_containing_type (die
, cu
);
4849 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4850 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4852 /* Get accessibility. */
4853 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4856 switch (DW_UNSND (attr
))
4858 case DW_ACCESS_private
:
4859 fnp
->is_private
= 1;
4861 case DW_ACCESS_protected
:
4862 fnp
->is_protected
= 1;
4867 /* Check for artificial methods. */
4868 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4869 if (attr
&& DW_UNSND (attr
) != 0)
4870 fnp
->is_artificial
= 1;
4872 /* Get index in virtual function table if it is a virtual member
4873 function. For GCC, this is an offset in the appropriate
4874 virtual table, as specified by DW_AT_containing_type. For
4875 everyone else, it is an expression to be evaluated relative
4876 to the object address. */
4878 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4879 if (attr
&& fnp
->fcontext
)
4881 /* Support the .debug_loc offsets */
4882 if (attr_form_is_block (attr
))
4884 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4886 else if (attr_form_is_section_offset (attr
))
4888 dwarf2_complex_location_expr_complaint ();
4892 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4898 /* We only support trivial expressions here. This hack will work
4899 for v3 classes, which always start with the vtable pointer. */
4900 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0
4901 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref
)
4903 struct dwarf_block blk
;
4904 blk
.size
= DW_BLOCK (attr
)->size
- 1;
4905 blk
.data
= DW_BLOCK (attr
)->data
+ 1;
4906 fnp
->voffset
= decode_locdesc (&blk
, cu
);
4907 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4908 dwarf2_complex_location_expr_complaint ();
4910 fnp
->voffset
/= cu
->header
.addr_size
;
4912 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4915 dwarf2_complex_location_expr_complaint ();
4919 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4920 if (attr
&& DW_UNSND (attr
))
4922 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4923 complaint (&symfile_complaints
,
4924 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4925 fieldname
, die
->offset
);
4926 TYPE_CPLUS_DYNAMIC (type
) = 1;
4931 /* Create the vector of member function fields, and attach it to the type. */
4934 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4935 struct dwarf2_cu
*cu
)
4937 struct fnfieldlist
*flp
;
4938 int total_length
= 0;
4941 if (cu
->language
== language_ada
)
4942 error ("unexpected member functions in Ada type");
4944 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4945 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4946 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4948 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4950 struct nextfnfield
*nfp
= flp
->head
;
4951 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4954 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4955 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4956 fn_flp
->fn_fields
= (struct fn_field
*)
4957 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4958 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4959 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4961 total_length
+= flp
->length
;
4964 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4965 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4968 /* Returns non-zero if NAME is the name of a vtable member in CU's
4969 language, zero otherwise. */
4971 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4973 static const char vptr
[] = "_vptr";
4974 static const char vtable
[] = "vtable";
4976 /* Look for the C++ and Java forms of the vtable. */
4977 if ((cu
->language
== language_java
4978 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4979 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4980 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4986 /* GCC outputs unnamed structures that are really pointers to member
4987 functions, with the ABI-specified layout. If TYPE describes
4988 such a structure, smash it into a member function type.
4990 GCC shouldn't do this; it should just output pointer to member DIEs.
4991 This is GCC PR debug/28767. */
4994 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
4996 struct type
*pfn_type
, *domain_type
, *new_type
;
4998 /* Check for a structure with no name and two children. */
4999 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
5002 /* Check for __pfn and __delta members. */
5003 if (TYPE_FIELD_NAME (type
, 0) == NULL
5004 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
5005 || TYPE_FIELD_NAME (type
, 1) == NULL
5006 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
5009 /* Find the type of the method. */
5010 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
5011 if (pfn_type
== NULL
5012 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
5013 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
5016 /* Look for the "this" argument. */
5017 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
5018 if (TYPE_NFIELDS (pfn_type
) == 0
5019 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
5020 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
5023 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
5024 new_type
= alloc_type (objfile
);
5025 smash_to_method_type (new_type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
5026 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
5027 TYPE_VARARGS (pfn_type
));
5028 smash_to_methodptr_type (type
, new_type
);
5031 /* Called when we find the DIE that starts a structure or union scope
5032 (definition) to process all dies that define the members of the
5035 NOTE: we need to call struct_type regardless of whether or not the
5036 DIE has an at_name attribute, since it might be an anonymous
5037 structure or union. This gets the type entered into our set of
5040 However, if the structure is incomplete (an opaque struct/union)
5041 then suppress creating a symbol table entry for it since gdb only
5042 wants to find the one with the complete definition. Note that if
5043 it is complete, we just call new_symbol, which does it's own
5044 checking about whether the struct/union is anonymous or not (and
5045 suppresses creating a symbol table entry itself). */
5047 static struct type
*
5048 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5050 struct objfile
*objfile
= cu
->objfile
;
5052 struct attribute
*attr
;
5054 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
5056 /* If the definition of this type lives in .debug_types, read that type.
5057 Don't follow DW_AT_specification though, that will take us back up
5058 the chain and we want to go down. */
5059 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5062 struct dwarf2_cu
*type_cu
= cu
;
5063 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5064 /* We could just recurse on read_structure_type, but we need to call
5065 get_die_type to ensure only one type for this DIE is created.
5066 This is important, for example, because for c++ classes we need
5067 TYPE_NAME set which is only done by new_symbol. Blech. */
5068 type
= read_type_die (type_die
, type_cu
);
5069 return set_die_type (die
, type
, cu
);
5072 type
= alloc_type (objfile
);
5073 INIT_CPLUS_SPECIFIC (type
);
5075 name
= dwarf2_name (die
, cu
);
5078 if (cu
->language
== language_cplus
5079 || cu
->language
== language_java
)
5081 TYPE_TAG_NAME (type
) = (char *) dwarf2_full_name (name
, die
, cu
);
5082 if (die
->tag
== DW_TAG_structure_type
5083 || die
->tag
== DW_TAG_class_type
)
5084 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5088 /* The name is already allocated along with this objfile, so
5089 we don't need to duplicate it for the type. */
5090 TYPE_TAG_NAME (type
) = (char *) name
;
5091 if (die
->tag
== DW_TAG_class_type
)
5092 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
5096 if (die
->tag
== DW_TAG_structure_type
)
5098 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5100 else if (die
->tag
== DW_TAG_union_type
)
5102 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5106 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5109 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
5110 TYPE_DECLARED_CLASS (type
) = 1;
5112 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5115 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5119 TYPE_LENGTH (type
) = 0;
5122 TYPE_STUB_SUPPORTED (type
) = 1;
5123 if (die_is_declaration (die
, cu
))
5124 TYPE_STUB (type
) = 1;
5125 else if (attr
== NULL
&& die
->child
== NULL
5126 && producer_is_realview (cu
->producer
))
5127 /* RealView does not output the required DW_AT_declaration
5128 on incomplete types. */
5129 TYPE_STUB (type
) = 1;
5131 set_descriptive_type (type
, die
, cu
);
5133 /* We need to add the type field to the die immediately so we don't
5134 infinitely recurse when dealing with pointers to the structure
5135 type within the structure itself. */
5136 set_die_type (die
, type
, cu
);
5138 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5140 struct field_info fi
;
5141 struct die_info
*child_die
;
5143 memset (&fi
, 0, sizeof (struct field_info
));
5145 child_die
= die
->child
;
5147 while (child_die
&& child_die
->tag
)
5149 if (child_die
->tag
== DW_TAG_member
5150 || child_die
->tag
== DW_TAG_variable
)
5152 /* NOTE: carlton/2002-11-05: A C++ static data member
5153 should be a DW_TAG_member that is a declaration, but
5154 all versions of G++ as of this writing (so through at
5155 least 3.2.1) incorrectly generate DW_TAG_variable
5156 tags for them instead. */
5157 dwarf2_add_field (&fi
, child_die
, cu
);
5159 else if (child_die
->tag
== DW_TAG_subprogram
)
5161 /* C++ member function. */
5162 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5164 else if (child_die
->tag
== DW_TAG_inheritance
)
5166 /* C++ base class field. */
5167 dwarf2_add_field (&fi
, child_die
, cu
);
5169 child_die
= sibling_die (child_die
);
5172 /* Attach fields and member functions to the type. */
5174 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5177 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5179 /* Get the type which refers to the base class (possibly this
5180 class itself) which contains the vtable pointer for the current
5181 class from the DW_AT_containing_type attribute. This use of
5182 DW_AT_containing_type is a GNU extension. */
5184 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5186 struct type
*t
= die_containing_type (die
, cu
);
5188 TYPE_VPTR_BASETYPE (type
) = t
;
5193 /* Our own class provides vtbl ptr. */
5194 for (i
= TYPE_NFIELDS (t
) - 1;
5195 i
>= TYPE_N_BASECLASSES (t
);
5198 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5200 if (is_vtable_name (fieldname
, cu
))
5202 TYPE_VPTR_FIELDNO (type
) = i
;
5207 /* Complain if virtual function table field not found. */
5208 if (i
< TYPE_N_BASECLASSES (t
))
5209 complaint (&symfile_complaints
,
5210 _("virtual function table pointer not found when defining class '%s'"),
5211 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5216 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5219 else if (cu
->producer
5220 && strncmp (cu
->producer
,
5221 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5223 /* The IBM XLC compiler does not provide direct indication
5224 of the containing type, but the vtable pointer is
5225 always named __vfp. */
5229 for (i
= TYPE_NFIELDS (type
) - 1;
5230 i
>= TYPE_N_BASECLASSES (type
);
5233 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5235 TYPE_VPTR_FIELDNO (type
) = i
;
5236 TYPE_VPTR_BASETYPE (type
) = type
;
5244 quirk_gcc_member_function_pointer (type
, cu
->objfile
);
5246 do_cleanups (back_to
);
5251 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5253 struct objfile
*objfile
= cu
->objfile
;
5254 struct die_info
*child_die
= die
->child
;
5255 struct type
*this_type
;
5257 this_type
= get_die_type (die
, cu
);
5258 if (this_type
== NULL
)
5259 this_type
= read_structure_type (die
, cu
);
5261 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5262 snapshots) has been known to create a die giving a declaration
5263 for a class that has, as a child, a die giving a definition for a
5264 nested class. So we have to process our children even if the
5265 current die is a declaration. Normally, of course, a declaration
5266 won't have any children at all. */
5268 while (child_die
!= NULL
&& child_die
->tag
)
5270 if (child_die
->tag
== DW_TAG_member
5271 || child_die
->tag
== DW_TAG_variable
5272 || child_die
->tag
== DW_TAG_inheritance
)
5277 process_die (child_die
, cu
);
5279 child_die
= sibling_die (child_die
);
5282 /* Do not consider external references. According to the DWARF standard,
5283 these DIEs are identified by the fact that they have no byte_size
5284 attribute, and a declaration attribute. */
5285 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5286 || !die_is_declaration (die
, cu
))
5287 new_symbol (die
, this_type
, cu
);
5290 /* Given a DW_AT_enumeration_type die, set its type. We do not
5291 complete the type's fields yet, or create any symbols. */
5293 static struct type
*
5294 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5296 struct objfile
*objfile
= cu
->objfile
;
5298 struct attribute
*attr
;
5301 /* If the definition of this type lives in .debug_types, read that type.
5302 Don't follow DW_AT_specification though, that will take us back up
5303 the chain and we want to go down. */
5304 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5307 struct dwarf2_cu
*type_cu
= cu
;
5308 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5309 type
= read_type_die (type_die
, type_cu
);
5310 return set_die_type (die
, type
, cu
);
5313 type
= alloc_type (objfile
);
5315 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5316 name
= dwarf2_full_name (NULL
, die
, cu
);
5318 TYPE_TAG_NAME (type
) = (char *) name
;
5320 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5323 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5327 TYPE_LENGTH (type
) = 0;
5330 /* The enumeration DIE can be incomplete. In Ada, any type can be
5331 declared as private in the package spec, and then defined only
5332 inside the package body. Such types are known as Taft Amendment
5333 Types. When another package uses such a type, an incomplete DIE
5334 may be generated by the compiler. */
5335 if (die_is_declaration (die
, cu
))
5336 TYPE_STUB (type
) = 1;
5338 return set_die_type (die
, type
, cu
);
5341 /* Given a pointer to a die which begins an enumeration, process all
5342 the dies that define the members of the enumeration, and create the
5343 symbol for the enumeration type.
5345 NOTE: We reverse the order of the element list. */
5348 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5350 struct objfile
*objfile
= cu
->objfile
;
5351 struct die_info
*child_die
;
5352 struct field
*fields
;
5355 int unsigned_enum
= 1;
5357 struct type
*this_type
;
5361 this_type
= get_die_type (die
, cu
);
5362 if (this_type
== NULL
)
5363 this_type
= read_enumeration_type (die
, cu
);
5364 if (die
->child
!= NULL
)
5366 child_die
= die
->child
;
5367 while (child_die
&& child_die
->tag
)
5369 if (child_die
->tag
!= DW_TAG_enumerator
)
5371 process_die (child_die
, cu
);
5375 name
= dwarf2_name (child_die
, cu
);
5378 sym
= new_symbol (child_die
, this_type
, cu
);
5379 if (SYMBOL_VALUE (sym
) < 0)
5382 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5384 fields
= (struct field
*)
5386 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5387 * sizeof (struct field
));
5390 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5391 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5392 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5393 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5399 child_die
= sibling_die (child_die
);
5404 TYPE_NFIELDS (this_type
) = num_fields
;
5405 TYPE_FIELDS (this_type
) = (struct field
*)
5406 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5407 memcpy (TYPE_FIELDS (this_type
), fields
,
5408 sizeof (struct field
) * num_fields
);
5412 TYPE_UNSIGNED (this_type
) = 1;
5415 new_symbol (die
, this_type
, cu
);
5418 /* Extract all information from a DW_TAG_array_type DIE and put it in
5419 the DIE's type field. For now, this only handles one dimensional
5422 static struct type
*
5423 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5425 struct objfile
*objfile
= cu
->objfile
;
5426 struct die_info
*child_die
;
5427 struct type
*type
= NULL
;
5428 struct type
*element_type
, *range_type
, *index_type
;
5429 struct type
**range_types
= NULL
;
5430 struct attribute
*attr
;
5432 struct cleanup
*back_to
;
5435 element_type
= die_type (die
, cu
);
5437 /* Irix 6.2 native cc creates array types without children for
5438 arrays with unspecified length. */
5439 if (die
->child
== NULL
)
5441 index_type
= objfile_type (objfile
)->builtin_int
;
5442 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5443 type
= create_array_type (NULL
, element_type
, range_type
);
5444 return set_die_type (die
, type
, cu
);
5447 back_to
= make_cleanup (null_cleanup
, NULL
);
5448 child_die
= die
->child
;
5449 while (child_die
&& child_die
->tag
)
5451 if (child_die
->tag
== DW_TAG_subrange_type
)
5453 struct type
*child_type
= read_type_die (child_die
, cu
);
5454 if (child_type
!= NULL
)
5456 /* The range type was succesfully read. Save it for
5457 the array type creation. */
5458 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5460 range_types
= (struct type
**)
5461 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5462 * sizeof (struct type
*));
5464 make_cleanup (free_current_contents
, &range_types
);
5466 range_types
[ndim
++] = child_type
;
5469 child_die
= sibling_die (child_die
);
5472 /* Dwarf2 dimensions are output from left to right, create the
5473 necessary array types in backwards order. */
5475 type
= element_type
;
5477 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5481 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5486 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5489 /* Understand Dwarf2 support for vector types (like they occur on
5490 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5491 array type. This is not part of the Dwarf2/3 standard yet, but a
5492 custom vendor extension. The main difference between a regular
5493 array and the vector variant is that vectors are passed by value
5495 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5497 make_vector_type (type
);
5499 name
= dwarf2_name (die
, cu
);
5501 TYPE_NAME (type
) = name
;
5503 set_descriptive_type (type
, die
, cu
);
5505 do_cleanups (back_to
);
5507 /* Install the type in the die. */
5508 return set_die_type (die
, type
, cu
);
5511 static enum dwarf_array_dim_ordering
5512 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5514 struct attribute
*attr
;
5516 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5518 if (attr
) return DW_SND (attr
);
5521 GNU F77 is a special case, as at 08/2004 array type info is the
5522 opposite order to the dwarf2 specification, but data is still
5523 laid out as per normal fortran.
5525 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5529 if (cu
->language
== language_fortran
5530 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5532 return DW_ORD_row_major
;
5535 switch (cu
->language_defn
->la_array_ordering
)
5537 case array_column_major
:
5538 return DW_ORD_col_major
;
5539 case array_row_major
:
5541 return DW_ORD_row_major
;
5545 /* Extract all information from a DW_TAG_set_type DIE and put it in
5546 the DIE's type field. */
5548 static struct type
*
5549 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5551 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5553 return set_die_type (die
, set_type
, cu
);
5556 /* First cut: install each common block member as a global variable. */
5559 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5561 struct die_info
*child_die
;
5562 struct attribute
*attr
;
5564 CORE_ADDR base
= (CORE_ADDR
) 0;
5566 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5569 /* Support the .debug_loc offsets */
5570 if (attr_form_is_block (attr
))
5572 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5574 else if (attr_form_is_section_offset (attr
))
5576 dwarf2_complex_location_expr_complaint ();
5580 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5581 "common block member");
5584 if (die
->child
!= NULL
)
5586 child_die
= die
->child
;
5587 while (child_die
&& child_die
->tag
)
5589 sym
= new_symbol (child_die
, NULL
, cu
);
5590 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5593 CORE_ADDR byte_offset
= 0;
5595 if (attr_form_is_section_offset (attr
))
5596 dwarf2_complex_location_expr_complaint ();
5597 else if (attr_form_is_constant (attr
))
5598 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5599 else if (attr_form_is_block (attr
))
5600 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5602 dwarf2_complex_location_expr_complaint ();
5604 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5605 add_symbol_to_list (sym
, &global_symbols
);
5607 child_die
= sibling_die (child_die
);
5612 /* Create a type for a C++ namespace. */
5614 static struct type
*
5615 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5617 struct objfile
*objfile
= cu
->objfile
;
5618 const char *previous_prefix
, *name
;
5622 /* For extensions, reuse the type of the original namespace. */
5623 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5625 struct die_info
*ext_die
;
5626 struct dwarf2_cu
*ext_cu
= cu
;
5627 ext_die
= dwarf2_extension (die
, &ext_cu
);
5628 type
= read_type_die (ext_die
, ext_cu
);
5629 return set_die_type (die
, type
, cu
);
5632 name
= namespace_name (die
, &is_anonymous
, cu
);
5634 /* Now build the name of the current namespace. */
5636 previous_prefix
= determine_prefix (die
, cu
);
5637 if (previous_prefix
[0] != '\0')
5638 name
= typename_concat (&objfile
->objfile_obstack
,
5639 previous_prefix
, name
, cu
);
5641 /* Create the type. */
5642 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5644 TYPE_NAME (type
) = (char *) name
;
5645 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5647 return set_die_type (die
, type
, cu
);
5650 /* Read a C++ namespace. */
5653 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5655 struct objfile
*objfile
= cu
->objfile
;
5659 /* Add a symbol associated to this if we haven't seen the namespace
5660 before. Also, add a using directive if it's an anonymous
5663 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5667 type
= read_type_die (die
, cu
);
5668 new_symbol (die
, type
, cu
);
5670 name
= namespace_name (die
, &is_anonymous
, cu
);
5673 const char *previous_prefix
= determine_prefix (die
, cu
);
5674 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
), NULL
,
5675 NULL
, &objfile
->objfile_obstack
);
5679 if (die
->child
!= NULL
)
5681 struct die_info
*child_die
= die
->child
;
5683 while (child_die
&& child_die
->tag
)
5685 process_die (child_die
, cu
);
5686 child_die
= sibling_die (child_die
);
5691 /* Read a Fortran module. */
5694 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5696 struct die_info
*child_die
= die
->child
;
5698 /* FIXME: Support the separate Fortran module namespaces. */
5700 while (child_die
&& child_die
->tag
)
5702 process_die (child_die
, cu
);
5703 child_die
= sibling_die (child_die
);
5707 /* Return the name of the namespace represented by DIE. Set
5708 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5712 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5714 struct die_info
*current_die
;
5715 const char *name
= NULL
;
5717 /* Loop through the extensions until we find a name. */
5719 for (current_die
= die
;
5720 current_die
!= NULL
;
5721 current_die
= dwarf2_extension (die
, &cu
))
5723 name
= dwarf2_name (current_die
, cu
);
5728 /* Is it an anonymous namespace? */
5730 *is_anonymous
= (name
== NULL
);
5732 name
= "(anonymous namespace)";
5737 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5738 the user defined type vector. */
5740 static struct type
*
5741 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5743 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5744 struct comp_unit_head
*cu_header
= &cu
->header
;
5746 struct attribute
*attr_byte_size
;
5747 struct attribute
*attr_address_class
;
5748 int byte_size
, addr_class
;
5750 type
= lookup_pointer_type (die_type (die
, cu
));
5752 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5754 byte_size
= DW_UNSND (attr_byte_size
);
5756 byte_size
= cu_header
->addr_size
;
5758 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5759 if (attr_address_class
)
5760 addr_class
= DW_UNSND (attr_address_class
);
5762 addr_class
= DW_ADDR_none
;
5764 /* If the pointer size or address class is different than the
5765 default, create a type variant marked as such and set the
5766 length accordingly. */
5767 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5769 if (gdbarch_address_class_type_flags_p (gdbarch
))
5773 type_flags
= gdbarch_address_class_type_flags
5774 (gdbarch
, byte_size
, addr_class
);
5775 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5777 type
= make_type_with_address_space (type
, type_flags
);
5779 else if (TYPE_LENGTH (type
) != byte_size
)
5781 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5784 /* Should we also complain about unhandled address classes? */
5788 TYPE_LENGTH (type
) = byte_size
;
5789 return set_die_type (die
, type
, cu
);
5792 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5793 the user defined type vector. */
5795 static struct type
*
5796 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5798 struct objfile
*objfile
= cu
->objfile
;
5800 struct type
*to_type
;
5801 struct type
*domain
;
5803 to_type
= die_type (die
, cu
);
5804 domain
= die_containing_type (die
, cu
);
5806 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5807 type
= lookup_methodptr_type (to_type
);
5809 type
= lookup_memberptr_type (to_type
, domain
);
5811 return set_die_type (die
, type
, cu
);
5814 /* Extract all information from a DW_TAG_reference_type DIE and add to
5815 the user defined type vector. */
5817 static struct type
*
5818 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5820 struct comp_unit_head
*cu_header
= &cu
->header
;
5822 struct attribute
*attr
;
5824 type
= lookup_reference_type (die_type (die
, cu
));
5825 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5828 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5832 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5834 return set_die_type (die
, type
, cu
);
5837 static struct type
*
5838 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5840 struct type
*base_type
, *cv_type
;
5842 base_type
= die_type (die
, cu
);
5843 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5844 return set_die_type (die
, cv_type
, cu
);
5847 static struct type
*
5848 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5850 struct type
*base_type
, *cv_type
;
5852 base_type
= die_type (die
, cu
);
5853 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5854 return set_die_type (die
, cv_type
, cu
);
5857 /* Extract all information from a DW_TAG_string_type DIE and add to
5858 the user defined type vector. It isn't really a user defined type,
5859 but it behaves like one, with other DIE's using an AT_user_def_type
5860 attribute to reference it. */
5862 static struct type
*
5863 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5865 struct objfile
*objfile
= cu
->objfile
;
5866 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5867 struct type
*type
, *range_type
, *index_type
, *char_type
;
5868 struct attribute
*attr
;
5869 unsigned int length
;
5871 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5874 length
= DW_UNSND (attr
);
5878 /* check for the DW_AT_byte_size attribute */
5879 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5882 length
= DW_UNSND (attr
);
5890 index_type
= objfile_type (objfile
)->builtin_int
;
5891 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5892 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5893 type
= create_string_type (NULL
, char_type
, range_type
);
5895 return set_die_type (die
, type
, cu
);
5898 /* Handle DIES due to C code like:
5902 int (*funcp)(int a, long l);
5906 ('funcp' generates a DW_TAG_subroutine_type DIE)
5909 static struct type
*
5910 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5912 struct type
*type
; /* Type that this function returns */
5913 struct type
*ftype
; /* Function that returns above type */
5914 struct attribute
*attr
;
5916 type
= die_type (die
, cu
);
5917 ftype
= lookup_function_type (type
);
5919 /* All functions in C++, Pascal and Java have prototypes. */
5920 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5921 if ((attr
&& (DW_UNSND (attr
) != 0))
5922 || cu
->language
== language_cplus
5923 || cu
->language
== language_java
5924 || cu
->language
== language_pascal
)
5925 TYPE_PROTOTYPED (ftype
) = 1;
5926 else if (producer_is_realview (cu
->producer
))
5927 /* RealView does not emit DW_AT_prototyped. We can not
5928 distinguish prototyped and unprototyped functions; default to
5929 prototyped, since that is more common in modern code (and
5930 RealView warns about unprototyped functions). */
5931 TYPE_PROTOTYPED (ftype
) = 1;
5933 /* Store the calling convention in the type if it's available in
5934 the subroutine die. Otherwise set the calling convention to
5935 the default value DW_CC_normal. */
5936 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5937 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5939 /* We need to add the subroutine type to the die immediately so
5940 we don't infinitely recurse when dealing with parameters
5941 declared as the same subroutine type. */
5942 set_die_type (die
, ftype
, cu
);
5944 if (die
->child
!= NULL
)
5946 struct type
*void_type
= objfile_type (cu
->objfile
)->builtin_void
;
5947 struct die_info
*child_die
;
5948 int nparams
, iparams
;
5950 /* Count the number of parameters.
5951 FIXME: GDB currently ignores vararg functions, but knows about
5952 vararg member functions. */
5954 child_die
= die
->child
;
5955 while (child_die
&& child_die
->tag
)
5957 if (child_die
->tag
== DW_TAG_formal_parameter
)
5959 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5960 TYPE_VARARGS (ftype
) = 1;
5961 child_die
= sibling_die (child_die
);
5964 /* Allocate storage for parameters and fill them in. */
5965 TYPE_NFIELDS (ftype
) = nparams
;
5966 TYPE_FIELDS (ftype
) = (struct field
*)
5967 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5969 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
5970 even if we error out during the parameters reading below. */
5971 for (iparams
= 0; iparams
< nparams
; iparams
++)
5972 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
5975 child_die
= die
->child
;
5976 while (child_die
&& child_die
->tag
)
5978 if (child_die
->tag
== DW_TAG_formal_parameter
)
5980 /* Dwarf2 has no clean way to discern C++ static and non-static
5981 member functions. G++ helps GDB by marking the first
5982 parameter for non-static member functions (which is the
5983 this pointer) as artificial. We pass this information
5984 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5985 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5987 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5990 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5992 /* GCC/43521: In java, the formal parameter
5993 "this" is sometimes not marked with DW_AT_artificial. */
5994 if (cu
->language
== language_java
)
5996 const char *name
= dwarf2_name (child_die
, cu
);
5997 if (name
&& !strcmp (name
, "this"))
5998 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 1;
6001 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
6004 child_die
= sibling_die (child_die
);
6011 static struct type
*
6012 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
6014 struct objfile
*objfile
= cu
->objfile
;
6015 struct attribute
*attr
;
6016 const char *name
= NULL
;
6017 struct type
*this_type
;
6019 name
= dwarf2_full_name (NULL
, die
, cu
);
6020 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
6021 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
6022 TYPE_NAME (this_type
) = (char *) name
;
6023 set_die_type (die
, this_type
, cu
);
6024 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
6028 /* Find a representation of a given base type and install
6029 it in the TYPE field of the die. */
6031 static struct type
*
6032 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6034 struct objfile
*objfile
= cu
->objfile
;
6036 struct attribute
*attr
;
6037 int encoding
= 0, size
= 0;
6039 enum type_code code
= TYPE_CODE_INT
;
6041 struct type
*target_type
= NULL
;
6043 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
6046 encoding
= DW_UNSND (attr
);
6048 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6051 size
= DW_UNSND (attr
);
6053 name
= dwarf2_name (die
, cu
);
6056 complaint (&symfile_complaints
,
6057 _("DW_AT_name missing from DW_TAG_base_type"));
6062 case DW_ATE_address
:
6063 /* Turn DW_ATE_address into a void * pointer. */
6064 code
= TYPE_CODE_PTR
;
6065 type_flags
|= TYPE_FLAG_UNSIGNED
;
6066 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
6068 case DW_ATE_boolean
:
6069 code
= TYPE_CODE_BOOL
;
6070 type_flags
|= TYPE_FLAG_UNSIGNED
;
6072 case DW_ATE_complex_float
:
6073 code
= TYPE_CODE_COMPLEX
;
6074 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
6076 case DW_ATE_decimal_float
:
6077 code
= TYPE_CODE_DECFLOAT
;
6080 code
= TYPE_CODE_FLT
;
6084 case DW_ATE_unsigned
:
6085 type_flags
|= TYPE_FLAG_UNSIGNED
;
6087 case DW_ATE_signed_char
:
6088 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6089 || cu
->language
== language_pascal
)
6090 code
= TYPE_CODE_CHAR
;
6092 case DW_ATE_unsigned_char
:
6093 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6094 || cu
->language
== language_pascal
)
6095 code
= TYPE_CODE_CHAR
;
6096 type_flags
|= TYPE_FLAG_UNSIGNED
;
6099 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6100 dwarf_type_encoding_name (encoding
));
6104 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6105 TYPE_NAME (type
) = name
;
6106 TYPE_TARGET_TYPE (type
) = target_type
;
6108 if (name
&& strcmp (name
, "char") == 0)
6109 TYPE_NOSIGN (type
) = 1;
6111 return set_die_type (die
, type
, cu
);
6114 /* Read the given DW_AT_subrange DIE. */
6116 static struct type
*
6117 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6119 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6120 struct type
*base_type
;
6121 struct type
*range_type
;
6122 struct attribute
*attr
;
6126 LONGEST negative_mask
;
6128 base_type
= die_type (die
, cu
);
6129 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6131 complaint (&symfile_complaints
,
6132 _("DW_AT_type missing from DW_TAG_subrange_type"));
6134 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
6135 0, NULL
, cu
->objfile
);
6138 if (cu
->language
== language_fortran
)
6140 /* FORTRAN implies a lower bound of 1, if not given. */
6144 /* FIXME: For variable sized arrays either of these could be
6145 a variable rather than a constant value. We'll allow it,
6146 but we don't know how to handle it. */
6147 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6149 low
= dwarf2_get_attr_constant_value (attr
, 0);
6151 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6154 if (attr
->form
== DW_FORM_block1
)
6156 /* GCC encodes arrays with unspecified or dynamic length
6157 with a DW_FORM_block1 attribute.
6158 FIXME: GDB does not yet know how to handle dynamic
6159 arrays properly, treat them as arrays with unspecified
6162 FIXME: jimb/2003-09-22: GDB does not really know
6163 how to handle arrays of unspecified length
6164 either; we just represent them as zero-length
6165 arrays. Choose an appropriate upper bound given
6166 the lower bound we've computed above. */
6170 high
= dwarf2_get_attr_constant_value (attr
, 1);
6174 (LONGEST
) -1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1);
6175 if (!TYPE_UNSIGNED (base_type
) && (low
& negative_mask
))
6176 low
|= negative_mask
;
6177 if (!TYPE_UNSIGNED (base_type
) && (high
& negative_mask
))
6178 high
|= negative_mask
;
6180 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6182 /* Mark arrays with dynamic length at least as an array of unspecified
6183 length. GDB could check the boundary but before it gets implemented at
6184 least allow accessing the array elements. */
6185 if (attr
&& attr
->form
== DW_FORM_block1
)
6186 TYPE_HIGH_BOUND_UNDEFINED (range_type
) = 1;
6188 name
= dwarf2_name (die
, cu
);
6190 TYPE_NAME (range_type
) = name
;
6192 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6194 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6196 set_descriptive_type (range_type
, die
, cu
);
6198 return set_die_type (die
, range_type
, cu
);
6201 static struct type
*
6202 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6206 /* For now, we only support the C meaning of an unspecified type: void. */
6208 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6209 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6211 return set_die_type (die
, type
, cu
);
6214 /* Trivial hash function for die_info: the hash value of a DIE
6215 is its offset in .debug_info for this objfile. */
6218 die_hash (const void *item
)
6220 const struct die_info
*die
= item
;
6224 /* Trivial comparison function for die_info structures: two DIEs
6225 are equal if they have the same offset. */
6228 die_eq (const void *item_lhs
, const void *item_rhs
)
6230 const struct die_info
*die_lhs
= item_lhs
;
6231 const struct die_info
*die_rhs
= item_rhs
;
6232 return die_lhs
->offset
== die_rhs
->offset
;
6235 /* Read a whole compilation unit into a linked list of dies. */
6237 static struct die_info
*
6238 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6240 struct die_reader_specs reader_specs
;
6242 gdb_assert (cu
->die_hash
== NULL
);
6244 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6248 &cu
->comp_unit_obstack
,
6249 hashtab_obstack_allocate
,
6250 dummy_obstack_deallocate
);
6252 init_cu_die_reader (&reader_specs
, cu
);
6254 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6257 /* Main entry point for reading a DIE and all children.
6258 Read the DIE and dump it if requested. */
6260 static struct die_info
*
6261 read_die_and_children (const struct die_reader_specs
*reader
,
6263 gdb_byte
**new_info_ptr
,
6264 struct die_info
*parent
)
6266 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6267 new_info_ptr
, parent
);
6269 if (dwarf2_die_debug
)
6271 fprintf_unfiltered (gdb_stdlog
,
6272 "\nRead die from %s of %s:\n",
6273 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6275 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6277 : "unknown section",
6278 reader
->abfd
->filename
);
6279 dump_die (result
, dwarf2_die_debug
);
6285 /* Read a single die and all its descendents. Set the die's sibling
6286 field to NULL; set other fields in the die correctly, and set all
6287 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6288 location of the info_ptr after reading all of those dies. PARENT
6289 is the parent of the die in question. */
6291 static struct die_info
*
6292 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6294 gdb_byte
**new_info_ptr
,
6295 struct die_info
*parent
)
6297 struct die_info
*die
;
6301 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6304 *new_info_ptr
= cur_ptr
;
6307 store_in_ref_table (die
, reader
->cu
);
6310 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6314 *new_info_ptr
= cur_ptr
;
6317 die
->sibling
= NULL
;
6318 die
->parent
= parent
;
6322 /* Read a die, all of its descendents, and all of its siblings; set
6323 all of the fields of all of the dies correctly. Arguments are as
6324 in read_die_and_children. */
6326 static struct die_info
*
6327 read_die_and_siblings (const struct die_reader_specs
*reader
,
6329 gdb_byte
**new_info_ptr
,
6330 struct die_info
*parent
)
6332 struct die_info
*first_die
, *last_sibling
;
6336 first_die
= last_sibling
= NULL
;
6340 struct die_info
*die
6341 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6345 *new_info_ptr
= cur_ptr
;
6352 last_sibling
->sibling
= die
;
6358 /* Read the die from the .debug_info section buffer. Set DIEP to
6359 point to a newly allocated die with its information, except for its
6360 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6361 whether the die has children or not. */
6364 read_full_die (const struct die_reader_specs
*reader
,
6365 struct die_info
**diep
, gdb_byte
*info_ptr
,
6368 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6369 struct abbrev_info
*abbrev
;
6370 struct die_info
*die
;
6371 struct dwarf2_cu
*cu
= reader
->cu
;
6372 bfd
*abfd
= reader
->abfd
;
6374 offset
= info_ptr
- reader
->buffer
;
6375 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6376 info_ptr
+= bytes_read
;
6384 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6386 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6388 bfd_get_filename (abfd
));
6390 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6391 die
->offset
= offset
;
6392 die
->tag
= abbrev
->tag
;
6393 die
->abbrev
= abbrev_number
;
6395 die
->num_attrs
= abbrev
->num_attrs
;
6397 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6398 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6399 abfd
, info_ptr
, cu
);
6402 *has_children
= abbrev
->has_children
;
6406 /* In DWARF version 2, the description of the debugging information is
6407 stored in a separate .debug_abbrev section. Before we read any
6408 dies from a section we read in all abbreviations and install them
6409 in a hash table. This function also sets flags in CU describing
6410 the data found in the abbrev table. */
6413 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6415 struct comp_unit_head
*cu_header
= &cu
->header
;
6416 gdb_byte
*abbrev_ptr
;
6417 struct abbrev_info
*cur_abbrev
;
6418 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6419 unsigned int abbrev_form
, hash_number
;
6420 struct attr_abbrev
*cur_attrs
;
6421 unsigned int allocated_attrs
;
6423 /* Initialize dwarf2 abbrevs */
6424 obstack_init (&cu
->abbrev_obstack
);
6425 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6427 * sizeof (struct abbrev_info
*)));
6428 memset (cu
->dwarf2_abbrevs
, 0,
6429 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6431 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
6432 &dwarf2_per_objfile
->abbrev
);
6433 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6434 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6435 abbrev_ptr
+= bytes_read
;
6437 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6438 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6440 /* loop until we reach an abbrev number of 0 */
6441 while (abbrev_number
)
6443 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6445 /* read in abbrev header */
6446 cur_abbrev
->number
= abbrev_number
;
6447 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6448 abbrev_ptr
+= bytes_read
;
6449 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6452 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6453 cu
->has_namespace_info
= 1;
6455 /* now read in declarations */
6456 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6457 abbrev_ptr
+= bytes_read
;
6458 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6459 abbrev_ptr
+= bytes_read
;
6462 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6464 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6466 = xrealloc (cur_attrs
, (allocated_attrs
6467 * sizeof (struct attr_abbrev
)));
6470 /* Record whether this compilation unit might have
6471 inter-compilation-unit references. If we don't know what form
6472 this attribute will have, then it might potentially be a
6473 DW_FORM_ref_addr, so we conservatively expect inter-CU
6476 if (abbrev_form
== DW_FORM_ref_addr
6477 || abbrev_form
== DW_FORM_indirect
)
6478 cu
->has_form_ref_addr
= 1;
6480 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6481 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6482 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6483 abbrev_ptr
+= bytes_read
;
6484 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6485 abbrev_ptr
+= bytes_read
;
6488 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6489 (cur_abbrev
->num_attrs
6490 * sizeof (struct attr_abbrev
)));
6491 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6492 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6494 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6495 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6496 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6498 /* Get next abbreviation.
6499 Under Irix6 the abbreviations for a compilation unit are not
6500 always properly terminated with an abbrev number of 0.
6501 Exit loop if we encounter an abbreviation which we have
6502 already read (which means we are about to read the abbreviations
6503 for the next compile unit) or if the end of the abbreviation
6504 table is reached. */
6505 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6506 >= dwarf2_per_objfile
->abbrev
.size
)
6508 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6509 abbrev_ptr
+= bytes_read
;
6510 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6517 /* Release the memory used by the abbrev table for a compilation unit. */
6520 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6522 struct dwarf2_cu
*cu
= ptr_to_cu
;
6524 obstack_free (&cu
->abbrev_obstack
, NULL
);
6525 cu
->dwarf2_abbrevs
= NULL
;
6528 /* Lookup an abbrev_info structure in the abbrev hash table. */
6530 static struct abbrev_info
*
6531 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6533 unsigned int hash_number
;
6534 struct abbrev_info
*abbrev
;
6536 hash_number
= number
% ABBREV_HASH_SIZE
;
6537 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6541 if (abbrev
->number
== number
)
6544 abbrev
= abbrev
->next
;
6549 /* Returns nonzero if TAG represents a type that we might generate a partial
6553 is_type_tag_for_partial (int tag
)
6558 /* Some types that would be reasonable to generate partial symbols for,
6559 that we don't at present. */
6560 case DW_TAG_array_type
:
6561 case DW_TAG_file_type
:
6562 case DW_TAG_ptr_to_member_type
:
6563 case DW_TAG_set_type
:
6564 case DW_TAG_string_type
:
6565 case DW_TAG_subroutine_type
:
6567 case DW_TAG_base_type
:
6568 case DW_TAG_class_type
:
6569 case DW_TAG_interface_type
:
6570 case DW_TAG_enumeration_type
:
6571 case DW_TAG_structure_type
:
6572 case DW_TAG_subrange_type
:
6573 case DW_TAG_typedef
:
6574 case DW_TAG_union_type
:
6581 /* Load all DIEs that are interesting for partial symbols into memory. */
6583 static struct partial_die_info
*
6584 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6585 int building_psymtab
, struct dwarf2_cu
*cu
)
6587 struct partial_die_info
*part_die
;
6588 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6589 struct abbrev_info
*abbrev
;
6590 unsigned int bytes_read
;
6591 unsigned int load_all
= 0;
6593 int nesting_level
= 1;
6598 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6602 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6606 &cu
->comp_unit_obstack
,
6607 hashtab_obstack_allocate
,
6608 dummy_obstack_deallocate
);
6610 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6611 sizeof (struct partial_die_info
));
6615 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6617 /* A NULL abbrev means the end of a series of children. */
6620 if (--nesting_level
== 0)
6622 /* PART_DIE was probably the last thing allocated on the
6623 comp_unit_obstack, so we could call obstack_free
6624 here. We don't do that because the waste is small,
6625 and will be cleaned up when we're done with this
6626 compilation unit. This way, we're also more robust
6627 against other users of the comp_unit_obstack. */
6630 info_ptr
+= bytes_read
;
6631 last_die
= parent_die
;
6632 parent_die
= parent_die
->die_parent
;
6636 /* Check whether this DIE is interesting enough to save. Normally
6637 we would not be interested in members here, but there may be
6638 later variables referencing them via DW_AT_specification (for
6641 && !is_type_tag_for_partial (abbrev
->tag
)
6642 && abbrev
->tag
!= DW_TAG_enumerator
6643 && abbrev
->tag
!= DW_TAG_subprogram
6644 && abbrev
->tag
!= DW_TAG_lexical_block
6645 && abbrev
->tag
!= DW_TAG_variable
6646 && abbrev
->tag
!= DW_TAG_namespace
6647 && abbrev
->tag
!= DW_TAG_member
)
6649 /* Otherwise we skip to the next sibling, if any. */
6650 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6654 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6655 buffer
, info_ptr
, cu
);
6657 /* This two-pass algorithm for processing partial symbols has a
6658 high cost in cache pressure. Thus, handle some simple cases
6659 here which cover the majority of C partial symbols. DIEs
6660 which neither have specification tags in them, nor could have
6661 specification tags elsewhere pointing at them, can simply be
6662 processed and discarded.
6664 This segment is also optional; scan_partial_symbols and
6665 add_partial_symbol will handle these DIEs if we chain
6666 them in normally. When compilers which do not emit large
6667 quantities of duplicate debug information are more common,
6668 this code can probably be removed. */
6670 /* Any complete simple types at the top level (pretty much all
6671 of them, for a language without namespaces), can be processed
6673 if (parent_die
== NULL
6674 && part_die
->has_specification
== 0
6675 && part_die
->is_declaration
== 0
6676 && (part_die
->tag
== DW_TAG_typedef
6677 || part_die
->tag
== DW_TAG_base_type
6678 || part_die
->tag
== DW_TAG_subrange_type
))
6680 if (building_psymtab
&& part_die
->name
!= NULL
)
6681 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6682 VAR_DOMAIN
, LOC_TYPEDEF
,
6683 &cu
->objfile
->static_psymbols
,
6684 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6685 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6689 /* If we're at the second level, and we're an enumerator, and
6690 our parent has no specification (meaning possibly lives in a
6691 namespace elsewhere), then we can add the partial symbol now
6692 instead of queueing it. */
6693 if (part_die
->tag
== DW_TAG_enumerator
6694 && parent_die
!= NULL
6695 && parent_die
->die_parent
== NULL
6696 && parent_die
->tag
== DW_TAG_enumeration_type
6697 && parent_die
->has_specification
== 0)
6699 if (part_die
->name
== NULL
)
6700 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6701 else if (building_psymtab
)
6702 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6703 VAR_DOMAIN
, LOC_CONST
,
6704 (cu
->language
== language_cplus
6705 || cu
->language
== language_java
)
6706 ? &cu
->objfile
->global_psymbols
6707 : &cu
->objfile
->static_psymbols
,
6708 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6710 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6714 /* We'll save this DIE so link it in. */
6715 part_die
->die_parent
= parent_die
;
6716 part_die
->die_sibling
= NULL
;
6717 part_die
->die_child
= NULL
;
6719 if (last_die
&& last_die
== parent_die
)
6720 last_die
->die_child
= part_die
;
6722 last_die
->die_sibling
= part_die
;
6724 last_die
= part_die
;
6726 if (first_die
== NULL
)
6727 first_die
= part_die
;
6729 /* Maybe add the DIE to the hash table. Not all DIEs that we
6730 find interesting need to be in the hash table, because we
6731 also have the parent/sibling/child chains; only those that we
6732 might refer to by offset later during partial symbol reading.
6734 For now this means things that might have be the target of a
6735 DW_AT_specification, DW_AT_abstract_origin, or
6736 DW_AT_extension. DW_AT_extension will refer only to
6737 namespaces; DW_AT_abstract_origin refers to functions (and
6738 many things under the function DIE, but we do not recurse
6739 into function DIEs during partial symbol reading) and
6740 possibly variables as well; DW_AT_specification refers to
6741 declarations. Declarations ought to have the DW_AT_declaration
6742 flag. It happens that GCC forgets to put it in sometimes, but
6743 only for functions, not for types.
6745 Adding more things than necessary to the hash table is harmless
6746 except for the performance cost. Adding too few will result in
6747 wasted time in find_partial_die, when we reread the compilation
6748 unit with load_all_dies set. */
6751 || abbrev
->tag
== DW_TAG_subprogram
6752 || abbrev
->tag
== DW_TAG_variable
6753 || abbrev
->tag
== DW_TAG_namespace
6754 || part_die
->is_declaration
)
6758 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6759 part_die
->offset
, INSERT
);
6763 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6764 sizeof (struct partial_die_info
));
6766 /* For some DIEs we want to follow their children (if any). For C
6767 we have no reason to follow the children of structures; for other
6768 languages we have to, both so that we can get at method physnames
6769 to infer fully qualified class names, and for DW_AT_specification.
6771 For Ada, we need to scan the children of subprograms and lexical
6772 blocks as well because Ada allows the definition of nested
6773 entities that could be interesting for the debugger, such as
6774 nested subprograms for instance. */
6775 if (last_die
->has_children
6777 || last_die
->tag
== DW_TAG_namespace
6778 || last_die
->tag
== DW_TAG_enumeration_type
6779 || (cu
->language
!= language_c
6780 && (last_die
->tag
== DW_TAG_class_type
6781 || last_die
->tag
== DW_TAG_interface_type
6782 || last_die
->tag
== DW_TAG_structure_type
6783 || last_die
->tag
== DW_TAG_union_type
))
6784 || (cu
->language
== language_ada
6785 && (last_die
->tag
== DW_TAG_subprogram
6786 || last_die
->tag
== DW_TAG_lexical_block
))))
6789 parent_die
= last_die
;
6793 /* Otherwise we skip to the next sibling, if any. */
6794 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6796 /* Back to the top, do it again. */
6800 /* Read a minimal amount of information into the minimal die structure. */
6803 read_partial_die (struct partial_die_info
*part_die
,
6804 struct abbrev_info
*abbrev
,
6805 unsigned int abbrev_len
, bfd
*abfd
,
6806 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6807 struct dwarf2_cu
*cu
)
6809 unsigned int bytes_read
, i
;
6810 struct attribute attr
;
6811 int has_low_pc_attr
= 0;
6812 int has_high_pc_attr
= 0;
6814 memset (part_die
, 0, sizeof (struct partial_die_info
));
6816 part_die
->offset
= info_ptr
- buffer
;
6818 info_ptr
+= abbrev_len
;
6823 part_die
->tag
= abbrev
->tag
;
6824 part_die
->has_children
= abbrev
->has_children
;
6826 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6828 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6830 /* Store the data if it is of an attribute we want to keep in a
6831 partial symbol table. */
6835 switch (part_die
->tag
)
6837 case DW_TAG_compile_unit
:
6838 case DW_TAG_type_unit
:
6839 /* Compilation units have a DW_AT_name that is a filename, not
6840 a source language identifier. */
6841 case DW_TAG_enumeration_type
:
6842 case DW_TAG_enumerator
:
6843 /* These tags always have simple identifiers already; no need
6844 to canonicalize them. */
6845 part_die
->name
= DW_STRING (&attr
);
6849 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6850 &cu
->objfile
->objfile_obstack
);
6854 case DW_AT_linkage_name
:
6855 case DW_AT_MIPS_linkage_name
:
6856 /* Note that both forms of linkage name might appear. We
6857 assume they will be the same, and we only store the last
6859 if (cu
->language
== language_ada
)
6860 part_die
->name
= DW_STRING (&attr
);
6863 has_low_pc_attr
= 1;
6864 part_die
->lowpc
= DW_ADDR (&attr
);
6867 has_high_pc_attr
= 1;
6868 part_die
->highpc
= DW_ADDR (&attr
);
6870 case DW_AT_location
:
6871 /* Support the .debug_loc offsets */
6872 if (attr_form_is_block (&attr
))
6874 part_die
->locdesc
= DW_BLOCK (&attr
);
6876 else if (attr_form_is_section_offset (&attr
))
6878 dwarf2_complex_location_expr_complaint ();
6882 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6883 "partial symbol information");
6886 case DW_AT_external
:
6887 part_die
->is_external
= DW_UNSND (&attr
);
6889 case DW_AT_declaration
:
6890 part_die
->is_declaration
= DW_UNSND (&attr
);
6893 part_die
->has_type
= 1;
6895 case DW_AT_abstract_origin
:
6896 case DW_AT_specification
:
6897 case DW_AT_extension
:
6898 part_die
->has_specification
= 1;
6899 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6902 /* Ignore absolute siblings, they might point outside of
6903 the current compile unit. */
6904 if (attr
.form
== DW_FORM_ref_addr
)
6905 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6907 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6909 case DW_AT_byte_size
:
6910 part_die
->has_byte_size
= 1;
6912 case DW_AT_calling_convention
:
6913 /* DWARF doesn't provide a way to identify a program's source-level
6914 entry point. DW_AT_calling_convention attributes are only meant
6915 to describe functions' calling conventions.
6917 However, because it's a necessary piece of information in
6918 Fortran, and because DW_CC_program is the only piece of debugging
6919 information whose definition refers to a 'main program' at all,
6920 several compilers have begun marking Fortran main programs with
6921 DW_CC_program --- even when those functions use the standard
6922 calling conventions.
6924 So until DWARF specifies a way to provide this information and
6925 compilers pick up the new representation, we'll support this
6927 if (DW_UNSND (&attr
) == DW_CC_program
6928 && cu
->language
== language_fortran
)
6929 set_main_name (part_die
->name
);
6936 /* When using the GNU linker, .gnu.linkonce. sections are used to
6937 eliminate duplicate copies of functions and vtables and such.
6938 The linker will arbitrarily choose one and discard the others.
6939 The AT_*_pc values for such functions refer to local labels in
6940 these sections. If the section from that file was discarded, the
6941 labels are not in the output, so the relocs get a value of 0.
6942 If this is a discarded function, mark the pc bounds as invalid,
6943 so that GDB will ignore it. */
6944 if (has_low_pc_attr
&& has_high_pc_attr
6945 && part_die
->lowpc
< part_die
->highpc
6946 && (part_die
->lowpc
!= 0
6947 || dwarf2_per_objfile
->has_section_at_zero
))
6948 part_die
->has_pc_info
= 1;
6953 /* Find a cached partial DIE at OFFSET in CU. */
6955 static struct partial_die_info
*
6956 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6958 struct partial_die_info
*lookup_die
= NULL
;
6959 struct partial_die_info part_die
;
6961 part_die
.offset
= offset
;
6962 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6967 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6968 except in the case of .debug_types DIEs which do not reference
6969 outside their CU (they do however referencing other types via
6972 static struct partial_die_info
*
6973 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6975 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6976 struct partial_die_info
*pd
= NULL
;
6978 if (cu
->per_cu
->from_debug_types
)
6980 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6986 if (offset_in_cu_p (&cu
->header
, offset
))
6988 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6993 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6995 if (per_cu
->cu
== NULL
)
6997 load_partial_comp_unit (per_cu
, cu
->objfile
);
6998 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6999 dwarf2_per_objfile
->read_in_chain
= per_cu
;
7002 per_cu
->cu
->last_used
= 0;
7003 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7005 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
7007 struct cleanup
*back_to
;
7008 struct partial_die_info comp_unit_die
;
7009 struct abbrev_info
*abbrev
;
7010 unsigned int bytes_read
;
7013 per_cu
->load_all_dies
= 1;
7015 /* Re-read the DIEs. */
7016 back_to
= make_cleanup (null_cleanup
, 0);
7017 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
7019 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
7020 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
7022 info_ptr
= (dwarf2_per_objfile
->info
.buffer
7023 + per_cu
->cu
->header
.offset
7024 + per_cu
->cu
->header
.first_die_offset
);
7025 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
7026 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
7027 per_cu
->cu
->objfile
->obfd
,
7028 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7030 if (comp_unit_die
.has_children
)
7031 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
7032 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
7034 do_cleanups (back_to
);
7036 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
7042 internal_error (__FILE__
, __LINE__
,
7043 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
7044 offset
, bfd_get_filename (cu
->objfile
->obfd
));
7048 /* Adjust PART_DIE before generating a symbol for it. This function
7049 may set the is_external flag or change the DIE's name. */
7052 fixup_partial_die (struct partial_die_info
*part_die
,
7053 struct dwarf2_cu
*cu
)
7055 /* If we found a reference attribute and the DIE has no name, try
7056 to find a name in the referred to DIE. */
7058 if (part_die
->name
== NULL
&& part_die
->has_specification
)
7060 struct partial_die_info
*spec_die
;
7062 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
7064 fixup_partial_die (spec_die
, cu
);
7068 part_die
->name
= spec_die
->name
;
7070 /* Copy DW_AT_external attribute if it is set. */
7071 if (spec_die
->is_external
)
7072 part_die
->is_external
= spec_die
->is_external
;
7076 /* Set default names for some unnamed DIEs. */
7077 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
7078 || part_die
->tag
== DW_TAG_class_type
))
7079 part_die
->name
= "(anonymous class)";
7081 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
7082 part_die
->name
= "(anonymous namespace)";
7084 if (part_die
->tag
== DW_TAG_structure_type
7085 || part_die
->tag
== DW_TAG_class_type
7086 || part_die
->tag
== DW_TAG_union_type
)
7087 guess_structure_name (part_die
, cu
);
7090 /* Read an attribute value described by an attribute form. */
7093 read_attribute_value (struct attribute
*attr
, unsigned form
,
7094 bfd
*abfd
, gdb_byte
*info_ptr
,
7095 struct dwarf2_cu
*cu
)
7097 struct comp_unit_head
*cu_header
= &cu
->header
;
7098 unsigned int bytes_read
;
7099 struct dwarf_block
*blk
;
7104 case DW_FORM_ref_addr
:
7105 if (cu
->header
.version
== 2)
7106 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7108 DW_ADDR (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7109 info_ptr
+= bytes_read
;
7112 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7113 info_ptr
+= bytes_read
;
7115 case DW_FORM_block2
:
7116 blk
= dwarf_alloc_block (cu
);
7117 blk
->size
= read_2_bytes (abfd
, info_ptr
);
7119 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7120 info_ptr
+= blk
->size
;
7121 DW_BLOCK (attr
) = blk
;
7123 case DW_FORM_block4
:
7124 blk
= dwarf_alloc_block (cu
);
7125 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7127 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7128 info_ptr
+= blk
->size
;
7129 DW_BLOCK (attr
) = blk
;
7132 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7136 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7140 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7143 case DW_FORM_sec_offset
:
7144 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
7145 info_ptr
+= bytes_read
;
7147 case DW_FORM_string
:
7148 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7149 DW_STRING_IS_CANONICAL (attr
) = 0;
7150 info_ptr
+= bytes_read
;
7153 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7155 DW_STRING_IS_CANONICAL (attr
) = 0;
7156 info_ptr
+= bytes_read
;
7158 case DW_FORM_exprloc
:
7160 blk
= dwarf_alloc_block (cu
);
7161 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7162 info_ptr
+= bytes_read
;
7163 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7164 info_ptr
+= blk
->size
;
7165 DW_BLOCK (attr
) = blk
;
7167 case DW_FORM_block1
:
7168 blk
= dwarf_alloc_block (cu
);
7169 blk
->size
= read_1_byte (abfd
, info_ptr
);
7171 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7172 info_ptr
+= blk
->size
;
7173 DW_BLOCK (attr
) = blk
;
7176 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7180 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7183 case DW_FORM_flag_present
:
7184 DW_UNSND (attr
) = 1;
7187 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7188 info_ptr
+= bytes_read
;
7191 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7192 info_ptr
+= bytes_read
;
7195 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7199 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7203 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7207 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7211 /* Convert the signature to something we can record in DW_UNSND
7213 NOTE: This is NULL if the type wasn't found. */
7214 DW_SIGNATURED_TYPE (attr
) =
7215 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7218 case DW_FORM_ref_udata
:
7219 DW_ADDR (attr
) = (cu
->header
.offset
7220 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7221 info_ptr
+= bytes_read
;
7223 case DW_FORM_indirect
:
7224 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7225 info_ptr
+= bytes_read
;
7226 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7229 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7230 dwarf_form_name (form
),
7231 bfd_get_filename (abfd
));
7234 /* We have seen instances where the compiler tried to emit a byte
7235 size attribute of -1 which ended up being encoded as an unsigned
7236 0xffffffff. Although 0xffffffff is technically a valid size value,
7237 an object of this size seems pretty unlikely so we can relatively
7238 safely treat these cases as if the size attribute was invalid and
7239 treat them as zero by default. */
7240 if (attr
->name
== DW_AT_byte_size
7241 && form
== DW_FORM_data4
7242 && DW_UNSND (attr
) >= 0xffffffff)
7245 (&symfile_complaints
,
7246 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
7247 hex_string (DW_UNSND (attr
)));
7248 DW_UNSND (attr
) = 0;
7254 /* Read an attribute described by an abbreviated attribute. */
7257 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7258 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7260 attr
->name
= abbrev
->name
;
7261 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7264 /* read dwarf information from a buffer */
7267 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7269 return bfd_get_8 (abfd
, buf
);
7273 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7275 return bfd_get_signed_8 (abfd
, buf
);
7279 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7281 return bfd_get_16 (abfd
, buf
);
7285 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7287 return bfd_get_signed_16 (abfd
, buf
);
7291 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7293 return bfd_get_32 (abfd
, buf
);
7297 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7299 return bfd_get_signed_32 (abfd
, buf
);
7303 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7305 return bfd_get_64 (abfd
, buf
);
7309 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7310 unsigned int *bytes_read
)
7312 struct comp_unit_head
*cu_header
= &cu
->header
;
7313 CORE_ADDR retval
= 0;
7315 if (cu_header
->signed_addr_p
)
7317 switch (cu_header
->addr_size
)
7320 retval
= bfd_get_signed_16 (abfd
, buf
);
7323 retval
= bfd_get_signed_32 (abfd
, buf
);
7326 retval
= bfd_get_signed_64 (abfd
, buf
);
7329 internal_error (__FILE__
, __LINE__
,
7330 _("read_address: bad switch, signed [in module %s]"),
7331 bfd_get_filename (abfd
));
7336 switch (cu_header
->addr_size
)
7339 retval
= bfd_get_16 (abfd
, buf
);
7342 retval
= bfd_get_32 (abfd
, buf
);
7345 retval
= bfd_get_64 (abfd
, buf
);
7348 internal_error (__FILE__
, __LINE__
,
7349 _("read_address: bad switch, unsigned [in module %s]"),
7350 bfd_get_filename (abfd
));
7354 *bytes_read
= cu_header
->addr_size
;
7358 /* Read the initial length from a section. The (draft) DWARF 3
7359 specification allows the initial length to take up either 4 bytes
7360 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7361 bytes describe the length and all offsets will be 8 bytes in length
7364 An older, non-standard 64-bit format is also handled by this
7365 function. The older format in question stores the initial length
7366 as an 8-byte quantity without an escape value. Lengths greater
7367 than 2^32 aren't very common which means that the initial 4 bytes
7368 is almost always zero. Since a length value of zero doesn't make
7369 sense for the 32-bit format, this initial zero can be considered to
7370 be an escape value which indicates the presence of the older 64-bit
7371 format. As written, the code can't detect (old format) lengths
7372 greater than 4GB. If it becomes necessary to handle lengths
7373 somewhat larger than 4GB, we could allow other small values (such
7374 as the non-sensical values of 1, 2, and 3) to also be used as
7375 escape values indicating the presence of the old format.
7377 The value returned via bytes_read should be used to increment the
7378 relevant pointer after calling read_initial_length().
7380 [ Note: read_initial_length() and read_offset() are based on the
7381 document entitled "DWARF Debugging Information Format", revision
7382 3, draft 8, dated November 19, 2001. This document was obtained
7385 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7387 This document is only a draft and is subject to change. (So beware.)
7389 Details regarding the older, non-standard 64-bit format were
7390 determined empirically by examining 64-bit ELF files produced by
7391 the SGI toolchain on an IRIX 6.5 machine.
7393 - Kevin, July 16, 2002
7397 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7399 LONGEST length
= bfd_get_32 (abfd
, buf
);
7401 if (length
== 0xffffffff)
7403 length
= bfd_get_64 (abfd
, buf
+ 4);
7406 else if (length
== 0)
7408 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7409 length
= bfd_get_64 (abfd
, buf
);
7420 /* Cover function for read_initial_length.
7421 Returns the length of the object at BUF, and stores the size of the
7422 initial length in *BYTES_READ and stores the size that offsets will be in
7424 If the initial length size is not equivalent to that specified in
7425 CU_HEADER then issue a complaint.
7426 This is useful when reading non-comp-unit headers. */
7429 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7430 const struct comp_unit_head
*cu_header
,
7431 unsigned int *bytes_read
,
7432 unsigned int *offset_size
)
7434 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7436 gdb_assert (cu_header
->initial_length_size
== 4
7437 || cu_header
->initial_length_size
== 8
7438 || cu_header
->initial_length_size
== 12);
7440 if (cu_header
->initial_length_size
!= *bytes_read
)
7441 complaint (&symfile_complaints
,
7442 _("intermixed 32-bit and 64-bit DWARF sections"));
7444 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7448 /* Read an offset from the data stream. The size of the offset is
7449 given by cu_header->offset_size. */
7452 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7453 unsigned int *bytes_read
)
7455 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7456 *bytes_read
= cu_header
->offset_size
;
7460 /* Read an offset from the data stream. */
7463 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7467 switch (offset_size
)
7470 retval
= bfd_get_32 (abfd
, buf
);
7473 retval
= bfd_get_64 (abfd
, buf
);
7476 internal_error (__FILE__
, __LINE__
,
7477 _("read_offset_1: bad switch [in module %s]"),
7478 bfd_get_filename (abfd
));
7485 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7487 /* If the size of a host char is 8 bits, we can return a pointer
7488 to the buffer, otherwise we have to copy the data to a buffer
7489 allocated on the temporary obstack. */
7490 gdb_assert (HOST_CHAR_BIT
== 8);
7495 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7497 /* If the size of a host char is 8 bits, we can return a pointer
7498 to the string, otherwise we have to copy the string to a buffer
7499 allocated on the temporary obstack. */
7500 gdb_assert (HOST_CHAR_BIT
== 8);
7503 *bytes_read_ptr
= 1;
7506 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7507 return (char *) buf
;
7511 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7512 const struct comp_unit_head
*cu_header
,
7513 unsigned int *bytes_read_ptr
)
7515 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7517 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->str
);
7518 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7520 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7521 bfd_get_filename (abfd
));
7524 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7526 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7527 bfd_get_filename (abfd
));
7530 gdb_assert (HOST_CHAR_BIT
== 8);
7531 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7533 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7536 static unsigned long
7537 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7539 unsigned long result
;
7540 unsigned int num_read
;
7550 byte
= bfd_get_8 (abfd
, buf
);
7553 result
|= ((unsigned long)(byte
& 127) << shift
);
7554 if ((byte
& 128) == 0)
7560 *bytes_read_ptr
= num_read
;
7565 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7568 int i
, shift
, num_read
;
7577 byte
= bfd_get_8 (abfd
, buf
);
7580 result
|= ((long)(byte
& 127) << shift
);
7582 if ((byte
& 128) == 0)
7587 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7588 result
|= -(((long)1) << shift
);
7589 *bytes_read_ptr
= num_read
;
7593 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7596 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7602 byte
= bfd_get_8 (abfd
, buf
);
7604 if ((byte
& 128) == 0)
7610 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7617 cu
->language
= language_c
;
7619 case DW_LANG_C_plus_plus
:
7620 cu
->language
= language_cplus
;
7623 cu
->language
= language_d
;
7625 case DW_LANG_Fortran77
:
7626 case DW_LANG_Fortran90
:
7627 case DW_LANG_Fortran95
:
7628 cu
->language
= language_fortran
;
7630 case DW_LANG_Mips_Assembler
:
7631 cu
->language
= language_asm
;
7634 cu
->language
= language_java
;
7638 cu
->language
= language_ada
;
7640 case DW_LANG_Modula2
:
7641 cu
->language
= language_m2
;
7643 case DW_LANG_Pascal83
:
7644 cu
->language
= language_pascal
;
7647 cu
->language
= language_objc
;
7649 case DW_LANG_Cobol74
:
7650 case DW_LANG_Cobol85
:
7652 cu
->language
= language_minimal
;
7655 cu
->language_defn
= language_def (cu
->language
);
7658 /* Return the named attribute or NULL if not there. */
7660 static struct attribute
*
7661 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7664 struct attribute
*spec
= NULL
;
7666 for (i
= 0; i
< die
->num_attrs
; ++i
)
7668 if (die
->attrs
[i
].name
== name
)
7669 return &die
->attrs
[i
];
7670 if (die
->attrs
[i
].name
== DW_AT_specification
7671 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7672 spec
= &die
->attrs
[i
];
7677 die
= follow_die_ref (die
, spec
, &cu
);
7678 return dwarf2_attr (die
, name
, cu
);
7684 /* Return the named attribute or NULL if not there,
7685 but do not follow DW_AT_specification, etc.
7686 This is for use in contexts where we're reading .debug_types dies.
7687 Following DW_AT_specification, DW_AT_abstract_origin will take us
7688 back up the chain, and we want to go down. */
7690 static struct attribute
*
7691 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7692 struct dwarf2_cu
*cu
)
7696 for (i
= 0; i
< die
->num_attrs
; ++i
)
7697 if (die
->attrs
[i
].name
== name
)
7698 return &die
->attrs
[i
];
7703 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7704 and holds a non-zero value. This function should only be used for
7705 DW_FORM_flag or DW_FORM_flag_present attributes. */
7708 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7710 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7712 return (attr
&& DW_UNSND (attr
));
7716 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7718 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7719 which value is non-zero. However, we have to be careful with
7720 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7721 (via dwarf2_flag_true_p) follows this attribute. So we may
7722 end up accidently finding a declaration attribute that belongs
7723 to a different DIE referenced by the specification attribute,
7724 even though the given DIE does not have a declaration attribute. */
7725 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7726 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7729 /* Return the die giving the specification for DIE, if there is
7730 one. *SPEC_CU is the CU containing DIE on input, and the CU
7731 containing the return value on output. If there is no
7732 specification, but there is an abstract origin, that is
7735 static struct die_info
*
7736 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7738 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7741 if (spec_attr
== NULL
)
7742 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7744 if (spec_attr
== NULL
)
7747 return follow_die_ref (die
, spec_attr
, spec_cu
);
7750 /* Free the line_header structure *LH, and any arrays and strings it
7753 free_line_header (struct line_header
*lh
)
7755 if (lh
->standard_opcode_lengths
)
7756 xfree (lh
->standard_opcode_lengths
);
7758 /* Remember that all the lh->file_names[i].name pointers are
7759 pointers into debug_line_buffer, and don't need to be freed. */
7761 xfree (lh
->file_names
);
7763 /* Similarly for the include directory names. */
7764 if (lh
->include_dirs
)
7765 xfree (lh
->include_dirs
);
7771 /* Add an entry to LH's include directory table. */
7773 add_include_dir (struct line_header
*lh
, char *include_dir
)
7775 /* Grow the array if necessary. */
7776 if (lh
->include_dirs_size
== 0)
7778 lh
->include_dirs_size
= 1; /* for testing */
7779 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7780 * sizeof (*lh
->include_dirs
));
7782 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7784 lh
->include_dirs_size
*= 2;
7785 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7786 (lh
->include_dirs_size
7787 * sizeof (*lh
->include_dirs
)));
7790 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7794 /* Add an entry to LH's file name table. */
7796 add_file_name (struct line_header
*lh
,
7798 unsigned int dir_index
,
7799 unsigned int mod_time
,
7800 unsigned int length
)
7802 struct file_entry
*fe
;
7804 /* Grow the array if necessary. */
7805 if (lh
->file_names_size
== 0)
7807 lh
->file_names_size
= 1; /* for testing */
7808 lh
->file_names
= xmalloc (lh
->file_names_size
7809 * sizeof (*lh
->file_names
));
7811 else if (lh
->num_file_names
>= lh
->file_names_size
)
7813 lh
->file_names_size
*= 2;
7814 lh
->file_names
= xrealloc (lh
->file_names
,
7815 (lh
->file_names_size
7816 * sizeof (*lh
->file_names
)));
7819 fe
= &lh
->file_names
[lh
->num_file_names
++];
7821 fe
->dir_index
= dir_index
;
7822 fe
->mod_time
= mod_time
;
7823 fe
->length
= length
;
7829 /* Read the statement program header starting at OFFSET in
7830 .debug_line, according to the endianness of ABFD. Return a pointer
7831 to a struct line_header, allocated using xmalloc.
7833 NOTE: the strings in the include directory and file name tables of
7834 the returned object point into debug_line_buffer, and must not be
7836 static struct line_header
*
7837 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7838 struct dwarf2_cu
*cu
)
7840 struct cleanup
*back_to
;
7841 struct line_header
*lh
;
7843 unsigned int bytes_read
, offset_size
;
7845 char *cur_dir
, *cur_file
;
7847 dwarf2_read_section (dwarf2_per_objfile
->objfile
, &dwarf2_per_objfile
->line
);
7848 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7850 complaint (&symfile_complaints
, _("missing .debug_line section"));
7854 /* Make sure that at least there's room for the total_length field.
7855 That could be 12 bytes long, but we're just going to fudge that. */
7856 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7858 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7862 lh
= xmalloc (sizeof (*lh
));
7863 memset (lh
, 0, sizeof (*lh
));
7864 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7867 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7869 /* Read in the header. */
7871 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7872 &bytes_read
, &offset_size
);
7873 line_ptr
+= bytes_read
;
7874 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7875 + dwarf2_per_objfile
->line
.size
))
7877 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7880 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7881 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7883 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7884 line_ptr
+= offset_size
;
7885 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7887 if (lh
->version
>= 4)
7889 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
7893 lh
->maximum_ops_per_instruction
= 1;
7895 if (lh
->maximum_ops_per_instruction
== 0)
7897 lh
->maximum_ops_per_instruction
= 1;
7898 complaint (&symfile_complaints
,
7899 _("invalid maximum_ops_per_instruction in `.debug_line' section"));
7902 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7904 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7906 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7908 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7910 lh
->standard_opcode_lengths
7911 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7913 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7914 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7916 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7920 /* Read directory table. */
7921 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7923 line_ptr
+= bytes_read
;
7924 add_include_dir (lh
, cur_dir
);
7926 line_ptr
+= bytes_read
;
7928 /* Read file name table. */
7929 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7931 unsigned int dir_index
, mod_time
, length
;
7933 line_ptr
+= bytes_read
;
7934 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7935 line_ptr
+= bytes_read
;
7936 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7937 line_ptr
+= bytes_read
;
7938 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7939 line_ptr
+= bytes_read
;
7941 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7943 line_ptr
+= bytes_read
;
7944 lh
->statement_program_start
= line_ptr
;
7946 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7947 + dwarf2_per_objfile
->line
.size
))
7948 complaint (&symfile_complaints
,
7949 _("line number info header doesn't fit in `.debug_line' section"));
7951 discard_cleanups (back_to
);
7955 /* This function exists to work around a bug in certain compilers
7956 (particularly GCC 2.95), in which the first line number marker of a
7957 function does not show up until after the prologue, right before
7958 the second line number marker. This function shifts ADDRESS down
7959 to the beginning of the function if necessary, and is called on
7960 addresses passed to record_line. */
7963 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7965 struct function_range
*fn
;
7967 /* Find the function_range containing address. */
7972 cu
->cached_fn
= cu
->first_fn
;
7976 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7982 while (fn
&& fn
!= cu
->cached_fn
)
7983 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7993 if (address
!= fn
->lowpc
)
7994 complaint (&symfile_complaints
,
7995 _("misplaced first line number at 0x%lx for '%s'"),
7996 (unsigned long) address
, fn
->name
);
8001 /* Decode the Line Number Program (LNP) for the given line_header
8002 structure and CU. The actual information extracted and the type
8003 of structures created from the LNP depends on the value of PST.
8005 1. If PST is NULL, then this procedure uses the data from the program
8006 to create all necessary symbol tables, and their linetables.
8007 The compilation directory of the file is passed in COMP_DIR,
8008 and must not be NULL.
8010 2. If PST is not NULL, this procedure reads the program to determine
8011 the list of files included by the unit represented by PST, and
8012 builds all the associated partial symbol tables. In this case,
8013 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
8014 is not used to compute the full name of the symtab, and therefore
8015 omitting it when building the partial symtab does not introduce
8016 the potential for inconsistency - a partial symtab and its associated
8017 symbtab having a different fullname -). */
8020 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
8021 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
8023 gdb_byte
*line_ptr
, *extended_end
;
8025 unsigned int bytes_read
, extended_len
;
8026 unsigned char op_code
, extended_op
, adj_opcode
;
8028 struct objfile
*objfile
= cu
->objfile
;
8029 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8030 const int decode_for_pst_p
= (pst
!= NULL
);
8031 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
8033 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8035 line_ptr
= lh
->statement_program_start
;
8036 line_end
= lh
->statement_program_end
;
8038 /* Read the statement sequences until there's nothing left. */
8039 while (line_ptr
< line_end
)
8041 /* state machine registers */
8042 CORE_ADDR address
= 0;
8043 unsigned int file
= 1;
8044 unsigned int line
= 1;
8045 unsigned int column
= 0;
8046 int is_stmt
= lh
->default_is_stmt
;
8047 int basic_block
= 0;
8048 int end_sequence
= 0;
8050 unsigned char op_index
= 0;
8052 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
8054 /* Start a subfile for the current file of the state machine. */
8055 /* lh->include_dirs and lh->file_names are 0-based, but the
8056 directory and file name numbers in the statement program
8058 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
8062 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8064 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8067 /* Decode the table. */
8068 while (!end_sequence
)
8070 op_code
= read_1_byte (abfd
, line_ptr
);
8072 if (line_ptr
> line_end
)
8074 dwarf2_debug_line_missing_end_sequence_complaint ();
8078 if (op_code
>= lh
->opcode_base
)
8080 /* Special operand. */
8081 adj_opcode
= op_code
- lh
->opcode_base
;
8082 address
+= (((op_index
+ (adj_opcode
/ lh
->line_range
))
8083 / lh
->maximum_ops_per_instruction
)
8084 * lh
->minimum_instruction_length
);
8085 op_index
= ((op_index
+ (adj_opcode
/ lh
->line_range
))
8086 % lh
->maximum_ops_per_instruction
);
8087 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
8088 if (lh
->num_file_names
< file
|| file
== 0)
8089 dwarf2_debug_line_missing_file_complaint ();
8090 /* For now we ignore lines not starting on an
8091 instruction boundary. */
8092 else if (op_index
== 0)
8094 lh
->file_names
[file
- 1].included_p
= 1;
8095 if (!decode_for_pst_p
&& is_stmt
)
8097 if (last_subfile
!= current_subfile
)
8099 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8101 record_line (last_subfile
, 0, addr
);
8102 last_subfile
= current_subfile
;
8104 /* Append row to matrix using current values. */
8105 addr
= check_cu_functions (address
, cu
);
8106 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8107 record_line (current_subfile
, line
, addr
);
8112 else switch (op_code
)
8114 case DW_LNS_extended_op
:
8115 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8116 line_ptr
+= bytes_read
;
8117 extended_end
= line_ptr
+ extended_len
;
8118 extended_op
= read_1_byte (abfd
, line_ptr
);
8120 switch (extended_op
)
8122 case DW_LNE_end_sequence
:
8125 case DW_LNE_set_address
:
8126 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
8128 line_ptr
+= bytes_read
;
8129 address
+= baseaddr
;
8131 case DW_LNE_define_file
:
8134 unsigned int dir_index
, mod_time
, length
;
8136 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
8137 line_ptr
+= bytes_read
;
8139 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8140 line_ptr
+= bytes_read
;
8142 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8143 line_ptr
+= bytes_read
;
8145 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8146 line_ptr
+= bytes_read
;
8147 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8150 case DW_LNE_set_discriminator
:
8151 /* The discriminator is not interesting to the debugger;
8153 line_ptr
= extended_end
;
8156 complaint (&symfile_complaints
,
8157 _("mangled .debug_line section"));
8160 /* Make sure that we parsed the extended op correctly. If e.g.
8161 we expected a different address size than the producer used,
8162 we may have read the wrong number of bytes. */
8163 if (line_ptr
!= extended_end
)
8165 complaint (&symfile_complaints
,
8166 _("mangled .debug_line section"));
8171 if (lh
->num_file_names
< file
|| file
== 0)
8172 dwarf2_debug_line_missing_file_complaint ();
8175 lh
->file_names
[file
- 1].included_p
= 1;
8176 if (!decode_for_pst_p
&& is_stmt
)
8178 if (last_subfile
!= current_subfile
)
8180 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8182 record_line (last_subfile
, 0, addr
);
8183 last_subfile
= current_subfile
;
8185 addr
= check_cu_functions (address
, cu
);
8186 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8187 record_line (current_subfile
, line
, addr
);
8192 case DW_LNS_advance_pc
:
8195 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8197 address
+= (((op_index
+ adjust
)
8198 / lh
->maximum_ops_per_instruction
)
8199 * lh
->minimum_instruction_length
);
8200 op_index
= ((op_index
+ adjust
)
8201 % lh
->maximum_ops_per_instruction
);
8202 line_ptr
+= bytes_read
;
8205 case DW_LNS_advance_line
:
8206 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8207 line_ptr
+= bytes_read
;
8209 case DW_LNS_set_file
:
8211 /* The arrays lh->include_dirs and lh->file_names are
8212 0-based, but the directory and file name numbers in
8213 the statement program are 1-based. */
8214 struct file_entry
*fe
;
8217 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8218 line_ptr
+= bytes_read
;
8219 if (lh
->num_file_names
< file
|| file
== 0)
8220 dwarf2_debug_line_missing_file_complaint ();
8223 fe
= &lh
->file_names
[file
- 1];
8225 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8226 if (!decode_for_pst_p
)
8228 last_subfile
= current_subfile
;
8229 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8234 case DW_LNS_set_column
:
8235 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8236 line_ptr
+= bytes_read
;
8238 case DW_LNS_negate_stmt
:
8239 is_stmt
= (!is_stmt
);
8241 case DW_LNS_set_basic_block
:
8244 /* Add to the address register of the state machine the
8245 address increment value corresponding to special opcode
8246 255. I.e., this value is scaled by the minimum
8247 instruction length since special opcode 255 would have
8248 scaled the the increment. */
8249 case DW_LNS_const_add_pc
:
8251 CORE_ADDR adjust
= (255 - lh
->opcode_base
) / lh
->line_range
;
8253 address
+= (((op_index
+ adjust
)
8254 / lh
->maximum_ops_per_instruction
)
8255 * lh
->minimum_instruction_length
);
8256 op_index
= ((op_index
+ adjust
)
8257 % lh
->maximum_ops_per_instruction
);
8260 case DW_LNS_fixed_advance_pc
:
8261 address
+= read_2_bytes (abfd
, line_ptr
);
8267 /* Unknown standard opcode, ignore it. */
8270 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8272 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8273 line_ptr
+= bytes_read
;
8278 if (lh
->num_file_names
< file
|| file
== 0)
8279 dwarf2_debug_line_missing_file_complaint ();
8282 lh
->file_names
[file
- 1].included_p
= 1;
8283 if (!decode_for_pst_p
)
8285 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8286 record_line (current_subfile
, 0, addr
);
8291 if (decode_for_pst_p
)
8295 /* Now that we're done scanning the Line Header Program, we can
8296 create the psymtab of each included file. */
8297 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8298 if (lh
->file_names
[file_index
].included_p
== 1)
8300 const struct file_entry fe
= lh
->file_names
[file_index
];
8301 char *include_name
= fe
.name
;
8302 char *dir_name
= NULL
;
8303 char *pst_filename
= pst
->filename
;
8306 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8308 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8310 include_name
= concat (dir_name
, SLASH_STRING
,
8311 include_name
, (char *)NULL
);
8312 make_cleanup (xfree
, include_name
);
8315 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8317 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8318 pst_filename
, (char *)NULL
);
8319 make_cleanup (xfree
, pst_filename
);
8322 if (strcmp (include_name
, pst_filename
) != 0)
8323 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8328 /* Make sure a symtab is created for every file, even files
8329 which contain only variables (i.e. no code with associated
8333 struct file_entry
*fe
;
8335 for (i
= 0; i
< lh
->num_file_names
; i
++)
8338 fe
= &lh
->file_names
[i
];
8340 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8341 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8343 /* Skip the main file; we don't need it, and it must be
8344 allocated last, so that it will show up before the
8345 non-primary symtabs in the objfile's symtab list. */
8346 if (current_subfile
== first_subfile
)
8349 if (current_subfile
->symtab
== NULL
)
8350 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8352 fe
->symtab
= current_subfile
->symtab
;
8357 /* Start a subfile for DWARF. FILENAME is the name of the file and
8358 DIRNAME the name of the source directory which contains FILENAME
8359 or NULL if not known. COMP_DIR is the compilation directory for the
8360 linetable's compilation unit or NULL if not known.
8361 This routine tries to keep line numbers from identical absolute and
8362 relative file names in a common subfile.
8364 Using the `list' example from the GDB testsuite, which resides in
8365 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8366 of /srcdir/list0.c yields the following debugging information for list0.c:
8368 DW_AT_name: /srcdir/list0.c
8369 DW_AT_comp_dir: /compdir
8370 files.files[0].name: list0.h
8371 files.files[0].dir: /srcdir
8372 files.files[1].name: list0.c
8373 files.files[1].dir: /srcdir
8375 The line number information for list0.c has to end up in a single
8376 subfile, so that `break /srcdir/list0.c:1' works as expected.
8377 start_subfile will ensure that this happens provided that we pass the
8378 concatenation of files.files[1].dir and files.files[1].name as the
8382 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8386 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8387 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8388 second argument to start_subfile. To be consistent, we do the
8389 same here. In order not to lose the line information directory,
8390 we concatenate it to the filename when it makes sense.
8391 Note that the Dwarf3 standard says (speaking of filenames in line
8392 information): ``The directory index is ignored for file names
8393 that represent full path names''. Thus ignoring dirname in the
8394 `else' branch below isn't an issue. */
8396 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8397 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8399 fullname
= filename
;
8401 start_subfile (fullname
, comp_dir
);
8403 if (fullname
!= filename
)
8408 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8409 struct dwarf2_cu
*cu
)
8411 struct objfile
*objfile
= cu
->objfile
;
8412 struct comp_unit_head
*cu_header
= &cu
->header
;
8414 /* NOTE drow/2003-01-30: There used to be a comment and some special
8415 code here to turn a symbol with DW_AT_external and a
8416 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8417 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8418 with some versions of binutils) where shared libraries could have
8419 relocations against symbols in their debug information - the
8420 minimal symbol would have the right address, but the debug info
8421 would not. It's no longer necessary, because we will explicitly
8422 apply relocations when we read in the debug information now. */
8424 /* A DW_AT_location attribute with no contents indicates that a
8425 variable has been optimized away. */
8426 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8428 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8432 /* Handle one degenerate form of location expression specially, to
8433 preserve GDB's previous behavior when section offsets are
8434 specified. If this is just a DW_OP_addr then mark this symbol
8437 if (attr_form_is_block (attr
)
8438 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8439 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8443 SYMBOL_VALUE_ADDRESS (sym
) =
8444 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8445 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8446 fixup_symbol_section (sym
, objfile
);
8447 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8448 SYMBOL_SECTION (sym
));
8452 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8453 expression evaluator, and use LOC_COMPUTED only when necessary
8454 (i.e. when the value of a register or memory location is
8455 referenced, or a thread-local block, etc.). Then again, it might
8456 not be worthwhile. I'm assuming that it isn't unless performance
8457 or memory numbers show me otherwise. */
8459 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8460 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8463 /* Given a pointer to a DWARF information entry, figure out if we need
8464 to make a symbol table entry for it, and if so, create a new entry
8465 and return a pointer to it.
8466 If TYPE is NULL, determine symbol type from the die, otherwise
8467 used the passed type. */
8469 static struct symbol
*
8470 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8472 struct objfile
*objfile
= cu
->objfile
;
8473 struct symbol
*sym
= NULL
;
8475 struct attribute
*attr
= NULL
;
8476 struct attribute
*attr2
= NULL
;
8478 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8480 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8482 name
= dwarf2_name (die
, cu
);
8485 const char *linkagename
;
8487 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8488 sizeof (struct symbol
));
8489 OBJSTAT (objfile
, n_syms
++);
8490 memset (sym
, 0, sizeof (struct symbol
));
8492 /* Cache this symbol's name and the name's demangled form (if any). */
8493 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8494 linkagename
= dwarf2_physname (name
, die
, cu
);
8495 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
8497 /* Default assumptions.
8498 Use the passed type or decode it from the die. */
8499 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8500 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8502 SYMBOL_TYPE (sym
) = type
;
8504 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8505 attr
= dwarf2_attr (die
,
8506 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8510 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8513 attr
= dwarf2_attr (die
,
8514 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8518 int file_index
= DW_UNSND (attr
);
8519 if (cu
->line_header
== NULL
8520 || file_index
> cu
->line_header
->num_file_names
)
8521 complaint (&symfile_complaints
,
8522 _("file index out of range"));
8523 else if (file_index
> 0)
8525 struct file_entry
*fe
;
8526 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8527 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8534 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8537 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8539 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8541 case DW_TAG_subprogram
:
8542 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8544 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8545 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8546 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8547 || cu
->language
== language_ada
)
8549 /* Subprograms marked external are stored as a global symbol.
8550 Ada subprograms, whether marked external or not, are always
8551 stored as a global symbol, because we want to be able to
8552 access them globally. For instance, we want to be able
8553 to break on a nested subprogram without having to
8554 specify the context. */
8555 add_symbol_to_list (sym
, &global_symbols
);
8559 add_symbol_to_list (sym
, cu
->list_in_scope
);
8562 case DW_TAG_inlined_subroutine
:
8563 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8565 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8566 SYMBOL_INLINED (sym
) = 1;
8567 /* Do not add the symbol to any lists. It will be found via
8568 BLOCK_FUNCTION from the blockvector. */
8570 case DW_TAG_variable
:
8571 /* Compilation with minimal debug info may result in variables
8572 with missing type entries. Change the misleading `void' type
8573 to something sensible. */
8574 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8576 = objfile_type (objfile
)->nodebug_data_symbol
;
8578 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8581 dwarf2_const_value (attr
, sym
, cu
);
8582 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8583 if (attr2
&& (DW_UNSND (attr2
) != 0))
8584 add_symbol_to_list (sym
, &global_symbols
);
8586 add_symbol_to_list (sym
, cu
->list_in_scope
);
8589 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8592 var_decode_location (attr
, sym
, cu
);
8593 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8594 if (attr2
&& (DW_UNSND (attr2
) != 0))
8596 struct pending
**list_to_add
;
8598 /* A variable with DW_AT_external is never static,
8599 but it may be block-scoped. */
8600 list_to_add
= (cu
->list_in_scope
== &file_symbols
8601 ? &global_symbols
: cu
->list_in_scope
);
8602 add_symbol_to_list (sym
, list_to_add
);
8605 add_symbol_to_list (sym
, cu
->list_in_scope
);
8609 /* We do not know the address of this symbol.
8610 If it is an external symbol and we have type information
8611 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8612 The address of the variable will then be determined from
8613 the minimal symbol table whenever the variable is
8615 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8616 if (attr2
&& (DW_UNSND (attr2
) != 0)
8617 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8619 struct pending
**list_to_add
;
8621 /* A variable with DW_AT_external is never static, but it
8622 may be block-scoped. */
8623 list_to_add
= (cu
->list_in_scope
== &file_symbols
8624 ? &global_symbols
: cu
->list_in_scope
);
8626 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8627 add_symbol_to_list (sym
, list_to_add
);
8629 else if (!die_is_declaration (die
, cu
))
8631 /* Use the default LOC_OPTIMIZED_OUT class. */
8632 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8633 add_symbol_to_list (sym
, cu
->list_in_scope
);
8637 case DW_TAG_formal_parameter
:
8638 /* If we are inside a function, mark this as an argument. If
8639 not, we might be looking at an argument to an inlined function
8640 when we do not have enough information to show inlined frames;
8641 pretend it's a local variable in that case so that the user can
8643 if (context_stack_depth
> 0
8644 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8645 SYMBOL_IS_ARGUMENT (sym
) = 1;
8646 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8649 var_decode_location (attr
, sym
, cu
);
8651 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8654 dwarf2_const_value (attr
, sym
, cu
);
8656 add_symbol_to_list (sym
, cu
->list_in_scope
);
8658 case DW_TAG_unspecified_parameters
:
8659 /* From varargs functions; gdb doesn't seem to have any
8660 interest in this information, so just ignore it for now.
8663 case DW_TAG_class_type
:
8664 case DW_TAG_interface_type
:
8665 case DW_TAG_structure_type
:
8666 case DW_TAG_union_type
:
8667 case DW_TAG_set_type
:
8668 case DW_TAG_enumeration_type
:
8669 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8670 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8672 /* Make sure that the symbol includes appropriate enclosing
8673 classes/namespaces in its name. These are calculated in
8674 read_structure_type, and the correct name is saved in
8677 if (cu
->language
== language_cplus
8678 || cu
->language
== language_java
)
8680 struct type
*type
= SYMBOL_TYPE (sym
);
8682 if (TYPE_TAG_NAME (type
) != NULL
)
8684 /* FIXME: carlton/2003-11-10: Should this use
8685 SYMBOL_SET_NAMES instead? (The same problem also
8686 arises further down in this function.) */
8687 /* The type's name is already allocated along with
8688 this objfile, so we don't need to duplicate it
8690 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8695 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8696 really ever be static objects: otherwise, if you try
8697 to, say, break of a class's method and you're in a file
8698 which doesn't mention that class, it won't work unless
8699 the check for all static symbols in lookup_symbol_aux
8700 saves you. See the OtherFileClass tests in
8701 gdb.c++/namespace.exp. */
8703 struct pending
**list_to_add
;
8705 list_to_add
= (cu
->list_in_scope
== &file_symbols
8706 && (cu
->language
== language_cplus
8707 || cu
->language
== language_java
)
8708 ? &global_symbols
: cu
->list_in_scope
);
8710 add_symbol_to_list (sym
, list_to_add
);
8712 /* The semantics of C++ state that "struct foo { ... }" also
8713 defines a typedef for "foo". A Java class declaration also
8714 defines a typedef for the class. */
8715 if (cu
->language
== language_cplus
8716 || cu
->language
== language_java
8717 || cu
->language
== language_ada
)
8719 /* The symbol's name is already allocated along with
8720 this objfile, so we don't need to duplicate it for
8722 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8723 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8727 case DW_TAG_typedef
:
8728 SYMBOL_LINKAGE_NAME (sym
)
8729 = (char *) dwarf2_full_name (name
, die
, cu
);
8730 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8731 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8732 add_symbol_to_list (sym
, cu
->list_in_scope
);
8734 case DW_TAG_base_type
:
8735 case DW_TAG_subrange_type
:
8736 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8737 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8738 add_symbol_to_list (sym
, cu
->list_in_scope
);
8740 case DW_TAG_enumerator
:
8741 SYMBOL_LINKAGE_NAME (sym
)
8742 = (char *) dwarf2_full_name (name
, die
, cu
);
8743 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8746 dwarf2_const_value (attr
, sym
, cu
);
8749 /* NOTE: carlton/2003-11-10: See comment above in the
8750 DW_TAG_class_type, etc. block. */
8752 struct pending
**list_to_add
;
8754 list_to_add
= (cu
->list_in_scope
== &file_symbols
8755 && (cu
->language
== language_cplus
8756 || cu
->language
== language_java
)
8757 ? &global_symbols
: cu
->list_in_scope
);
8759 add_symbol_to_list (sym
, list_to_add
);
8762 case DW_TAG_namespace
:
8763 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8764 add_symbol_to_list (sym
, &global_symbols
);
8767 /* Not a tag we recognize. Hopefully we aren't processing
8768 trash data, but since we must specifically ignore things
8769 we don't recognize, there is nothing else we should do at
8771 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8772 dwarf_tag_name (die
->tag
));
8776 /* For the benefit of old versions of GCC, check for anonymous
8777 namespaces based on the demangled name. */
8778 if (!processing_has_namespace_info
8779 && cu
->language
== language_cplus
)
8780 cp_scan_for_anonymous_namespaces (sym
);
8785 /* Copy constant value from an attribute to a symbol. */
8788 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8789 struct dwarf2_cu
*cu
)
8791 struct objfile
*objfile
= cu
->objfile
;
8792 struct comp_unit_head
*cu_header
= &cu
->header
;
8793 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8794 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8795 struct dwarf_block
*blk
;
8800 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8801 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8802 cu_header
->addr_size
,
8803 TYPE_LENGTH (SYMBOL_TYPE
8805 SYMBOL_VALUE_BYTES (sym
) =
8806 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8807 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8808 it's body - store_unsigned_integer. */
8809 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8810 byte_order
, DW_ADDR (attr
));
8811 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8813 case DW_FORM_string
:
8815 /* DW_STRING is already allocated on the obstack, point directly
8817 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8818 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8820 case DW_FORM_block1
:
8821 case DW_FORM_block2
:
8822 case DW_FORM_block4
:
8824 case DW_FORM_exprloc
:
8825 blk
= DW_BLOCK (attr
);
8826 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8827 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8829 TYPE_LENGTH (SYMBOL_TYPE
8831 SYMBOL_VALUE_BYTES (sym
) =
8832 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8833 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8834 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8837 /* The DW_AT_const_value attributes are supposed to carry the
8838 symbol's value "represented as it would be on the target
8839 architecture." By the time we get here, it's already been
8840 converted to host endianness, so we just need to sign- or
8841 zero-extend it as appropriate. */
8843 dwarf2_const_value_data (attr
, sym
, 8);
8846 dwarf2_const_value_data (attr
, sym
, 16);
8849 dwarf2_const_value_data (attr
, sym
, 32);
8852 dwarf2_const_value_data (attr
, sym
, 64);
8856 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8857 SYMBOL_CLASS (sym
) = LOC_CONST
;
8861 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8862 SYMBOL_CLASS (sym
) = LOC_CONST
;
8866 complaint (&symfile_complaints
,
8867 _("unsupported const value attribute form: '%s'"),
8868 dwarf_form_name (attr
->form
));
8869 SYMBOL_VALUE (sym
) = 0;
8870 SYMBOL_CLASS (sym
) = LOC_CONST
;
8876 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8877 or zero-extend it as appropriate for the symbol's type. */
8879 dwarf2_const_value_data (struct attribute
*attr
,
8883 LONGEST l
= DW_UNSND (attr
);
8885 if (bits
< sizeof (l
) * 8)
8887 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8888 l
&= ((LONGEST
) 1 << bits
) - 1;
8890 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8893 SYMBOL_VALUE (sym
) = l
;
8894 SYMBOL_CLASS (sym
) = LOC_CONST
;
8898 /* Return the type of the die in question using its DW_AT_type attribute. */
8900 static struct type
*
8901 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8904 struct attribute
*type_attr
;
8905 struct die_info
*type_die
;
8907 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8910 /* A missing DW_AT_type represents a void type. */
8911 return objfile_type (cu
->objfile
)->builtin_void
;
8914 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8916 type
= tag_type_to_type (type_die
, cu
);
8919 dump_die_for_error (type_die
);
8920 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8926 /* True iff CU's producer generates GNAT Ada auxiliary information
8927 that allows to find parallel types through that information instead
8928 of having to do expensive parallel lookups by type name. */
8931 need_gnat_info (struct dwarf2_cu
*cu
)
8933 /* FIXME: brobecker/2010-10-12: As of now, only the AdaCore version
8934 of GNAT produces this auxiliary information, without any indication
8935 that it is produced. Part of enhancing the FSF version of GNAT
8936 to produce that information will be to put in place an indicator
8937 that we can use in order to determine whether the descriptive type
8938 info is available or not. One suggestion that has been made is
8939 to use a new attribute, attached to the CU die. For now, assume
8940 that the descriptive type info is not available. */
8945 /* Return the auxiliary type of the die in question using its
8946 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
8947 attribute is not present. */
8949 static struct type
*
8950 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8953 struct attribute
*type_attr
;
8954 struct die_info
*type_die
;
8956 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
8960 type_die
= follow_die_ref (die
, type_attr
, &cu
);
8961 type
= tag_type_to_type (type_die
, cu
);
8964 dump_die_for_error (type_die
);
8965 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8971 /* If DIE has a descriptive_type attribute, then set the TYPE's
8972 descriptive type accordingly. */
8975 set_descriptive_type (struct type
*type
, struct die_info
*die
,
8976 struct dwarf2_cu
*cu
)
8978 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
8980 if (descriptive_type
)
8982 ALLOCATE_GNAT_AUX_TYPE (type
);
8983 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
8987 /* Return the containing type of the die in question using its
8988 DW_AT_containing_type attribute. */
8990 static struct type
*
8991 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8993 struct type
*type
= NULL
;
8994 struct attribute
*type_attr
;
8995 struct die_info
*type_die
= NULL
;
8997 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
9000 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
9001 type
= tag_type_to_type (type_die
, cu
);
9006 dump_die_for_error (type_die
);
9007 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
9013 static struct type
*
9014 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
9016 struct type
*this_type
;
9018 this_type
= read_type_die (die
, cu
);
9021 dump_die_for_error (die
);
9022 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
9028 static struct type
*
9029 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9031 struct type
*this_type
;
9033 this_type
= get_die_type (die
, cu
);
9039 case DW_TAG_class_type
:
9040 case DW_TAG_interface_type
:
9041 case DW_TAG_structure_type
:
9042 case DW_TAG_union_type
:
9043 this_type
= read_structure_type (die
, cu
);
9045 case DW_TAG_enumeration_type
:
9046 this_type
= read_enumeration_type (die
, cu
);
9048 case DW_TAG_subprogram
:
9049 case DW_TAG_subroutine_type
:
9050 case DW_TAG_inlined_subroutine
:
9051 this_type
= read_subroutine_type (die
, cu
);
9053 case DW_TAG_array_type
:
9054 this_type
= read_array_type (die
, cu
);
9056 case DW_TAG_set_type
:
9057 this_type
= read_set_type (die
, cu
);
9059 case DW_TAG_pointer_type
:
9060 this_type
= read_tag_pointer_type (die
, cu
);
9062 case DW_TAG_ptr_to_member_type
:
9063 this_type
= read_tag_ptr_to_member_type (die
, cu
);
9065 case DW_TAG_reference_type
:
9066 this_type
= read_tag_reference_type (die
, cu
);
9068 case DW_TAG_const_type
:
9069 this_type
= read_tag_const_type (die
, cu
);
9071 case DW_TAG_volatile_type
:
9072 this_type
= read_tag_volatile_type (die
, cu
);
9074 case DW_TAG_string_type
:
9075 this_type
= read_tag_string_type (die
, cu
);
9077 case DW_TAG_typedef
:
9078 this_type
= read_typedef (die
, cu
);
9080 case DW_TAG_subrange_type
:
9081 this_type
= read_subrange_type (die
, cu
);
9083 case DW_TAG_base_type
:
9084 this_type
= read_base_type (die
, cu
);
9086 case DW_TAG_unspecified_type
:
9087 this_type
= read_unspecified_type (die
, cu
);
9089 case DW_TAG_namespace
:
9090 this_type
= read_namespace_type (die
, cu
);
9093 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
9094 dwarf_tag_name (die
->tag
));
9101 /* Return the name of the namespace/class that DIE is defined within,
9102 or "" if we can't tell. The caller should not xfree the result.
9104 For example, if we're within the method foo() in the following
9114 then determine_prefix on foo's die will return "N::C". */
9117 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
9119 struct die_info
*parent
, *spec_die
;
9120 struct dwarf2_cu
*spec_cu
;
9121 struct type
*parent_type
;
9123 if (cu
->language
!= language_cplus
9124 && cu
->language
!= language_java
)
9127 /* We have to be careful in the presence of DW_AT_specification.
9128 For example, with GCC 3.4, given the code
9132 // Definition of N::foo.
9136 then we'll have a tree of DIEs like this:
9138 1: DW_TAG_compile_unit
9139 2: DW_TAG_namespace // N
9140 3: DW_TAG_subprogram // declaration of N::foo
9141 4: DW_TAG_subprogram // definition of N::foo
9142 DW_AT_specification // refers to die #3
9144 Thus, when processing die #4, we have to pretend that we're in
9145 the context of its DW_AT_specification, namely the contex of die
9148 spec_die
= die_specification (die
, &spec_cu
);
9149 if (spec_die
== NULL
)
9150 parent
= die
->parent
;
9153 parent
= spec_die
->parent
;
9160 switch (parent
->tag
)
9162 case DW_TAG_namespace
:
9163 parent_type
= read_type_die (parent
, cu
);
9164 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
9165 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
9166 Work around this problem here. */
9167 if (cu
->language
== language_cplus
9168 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
9170 /* We give a name to even anonymous namespaces. */
9171 return TYPE_TAG_NAME (parent_type
);
9172 case DW_TAG_class_type
:
9173 case DW_TAG_interface_type
:
9174 case DW_TAG_structure_type
:
9175 case DW_TAG_union_type
:
9176 parent_type
= read_type_die (parent
, cu
);
9177 if (TYPE_TAG_NAME (parent_type
) != NULL
)
9178 return TYPE_TAG_NAME (parent_type
);
9180 /* An anonymous structure is only allowed non-static data
9181 members; no typedefs, no member functions, et cetera.
9182 So it does not need a prefix. */
9185 return determine_prefix (parent
, cu
);
9189 /* Return a newly-allocated string formed by concatenating PREFIX and
9190 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
9191 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
9192 perform an obconcat, otherwise allocate storage for the result. The CU argument
9193 is used to determine the language and hence, the appropriate separator. */
9195 #define MAX_SEP_LEN 2 /* sizeof ("::") */
9198 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
9199 struct dwarf2_cu
*cu
)
9203 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
9205 else if (cu
->language
== language_java
)
9217 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
9218 strcpy (retval
, prefix
);
9219 strcat (retval
, sep
);
9220 strcat (retval
, suffix
);
9225 /* We have an obstack. */
9226 return obconcat (obs
, prefix
, sep
, suffix
);
9230 /* Return sibling of die, NULL if no sibling. */
9232 static struct die_info
*
9233 sibling_die (struct die_info
*die
)
9235 return die
->sibling
;
9238 /* Get name of a die, return NULL if not found. */
9241 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9242 struct obstack
*obstack
)
9244 if (name
&& cu
->language
== language_cplus
)
9246 char *canon_name
= cp_canonicalize_string (name
);
9248 if (canon_name
!= NULL
)
9250 if (strcmp (canon_name
, name
) != 0)
9251 name
= obsavestring (canon_name
, strlen (canon_name
),
9260 /* Get name of a die, return NULL if not found. */
9263 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9265 struct attribute
*attr
;
9267 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9268 if (!attr
|| !DW_STRING (attr
))
9273 case DW_TAG_compile_unit
:
9274 /* Compilation units have a DW_AT_name that is a filename, not
9275 a source language identifier. */
9276 case DW_TAG_enumeration_type
:
9277 case DW_TAG_enumerator
:
9278 /* These tags always have simple identifiers already; no need
9279 to canonicalize them. */
9280 return DW_STRING (attr
);
9282 case DW_TAG_subprogram
:
9283 /* Java constructors will all be named "<init>", so return
9284 the class name when we see this special case. */
9285 if (cu
->language
== language_java
9286 && DW_STRING (attr
) != NULL
9287 && strcmp (DW_STRING (attr
), "<init>") == 0)
9289 struct dwarf2_cu
*spec_cu
= cu
;
9290 struct die_info
*spec_die
;
9292 /* GCJ will output '<init>' for Java constructor names.
9293 For this special case, return the name of the parent class. */
9295 /* GCJ may output suprogram DIEs with AT_specification set.
9296 If so, use the name of the specified DIE. */
9297 spec_die
= die_specification (die
, &spec_cu
);
9298 if (spec_die
!= NULL
)
9299 return dwarf2_name (spec_die
, spec_cu
);
9304 if (die
->tag
== DW_TAG_class_type
)
9305 return dwarf2_name (die
, cu
);
9307 while (die
->tag
!= DW_TAG_compile_unit
);
9311 case DW_TAG_class_type
:
9312 case DW_TAG_interface_type
:
9313 case DW_TAG_structure_type
:
9314 case DW_TAG_union_type
:
9315 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
9316 structures or unions. These were of the form "._%d" in GCC 4.1,
9317 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
9318 and GCC 4.4. We work around this problem by ignoring these. */
9319 if (strncmp (DW_STRING (attr
), "._", 2) == 0
9320 || strncmp (DW_STRING (attr
), "<anonymous", 10) == 0)
9328 if (!DW_STRING_IS_CANONICAL (attr
))
9331 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9332 &cu
->objfile
->objfile_obstack
);
9333 DW_STRING_IS_CANONICAL (attr
) = 1;
9335 return DW_STRING (attr
);
9338 /* Return the die that this die in an extension of, or NULL if there
9339 is none. *EXT_CU is the CU containing DIE on input, and the CU
9340 containing the return value on output. */
9342 static struct die_info
*
9343 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9345 struct attribute
*attr
;
9347 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9351 return follow_die_ref (die
, attr
, ext_cu
);
9354 /* Convert a DIE tag into its string name. */
9357 dwarf_tag_name (unsigned tag
)
9361 case DW_TAG_padding
:
9362 return "DW_TAG_padding";
9363 case DW_TAG_array_type
:
9364 return "DW_TAG_array_type";
9365 case DW_TAG_class_type
:
9366 return "DW_TAG_class_type";
9367 case DW_TAG_entry_point
:
9368 return "DW_TAG_entry_point";
9369 case DW_TAG_enumeration_type
:
9370 return "DW_TAG_enumeration_type";
9371 case DW_TAG_formal_parameter
:
9372 return "DW_TAG_formal_parameter";
9373 case DW_TAG_imported_declaration
:
9374 return "DW_TAG_imported_declaration";
9376 return "DW_TAG_label";
9377 case DW_TAG_lexical_block
:
9378 return "DW_TAG_lexical_block";
9380 return "DW_TAG_member";
9381 case DW_TAG_pointer_type
:
9382 return "DW_TAG_pointer_type";
9383 case DW_TAG_reference_type
:
9384 return "DW_TAG_reference_type";
9385 case DW_TAG_compile_unit
:
9386 return "DW_TAG_compile_unit";
9387 case DW_TAG_string_type
:
9388 return "DW_TAG_string_type";
9389 case DW_TAG_structure_type
:
9390 return "DW_TAG_structure_type";
9391 case DW_TAG_subroutine_type
:
9392 return "DW_TAG_subroutine_type";
9393 case DW_TAG_typedef
:
9394 return "DW_TAG_typedef";
9395 case DW_TAG_union_type
:
9396 return "DW_TAG_union_type";
9397 case DW_TAG_unspecified_parameters
:
9398 return "DW_TAG_unspecified_parameters";
9399 case DW_TAG_variant
:
9400 return "DW_TAG_variant";
9401 case DW_TAG_common_block
:
9402 return "DW_TAG_common_block";
9403 case DW_TAG_common_inclusion
:
9404 return "DW_TAG_common_inclusion";
9405 case DW_TAG_inheritance
:
9406 return "DW_TAG_inheritance";
9407 case DW_TAG_inlined_subroutine
:
9408 return "DW_TAG_inlined_subroutine";
9410 return "DW_TAG_module";
9411 case DW_TAG_ptr_to_member_type
:
9412 return "DW_TAG_ptr_to_member_type";
9413 case DW_TAG_set_type
:
9414 return "DW_TAG_set_type";
9415 case DW_TAG_subrange_type
:
9416 return "DW_TAG_subrange_type";
9417 case DW_TAG_with_stmt
:
9418 return "DW_TAG_with_stmt";
9419 case DW_TAG_access_declaration
:
9420 return "DW_TAG_access_declaration";
9421 case DW_TAG_base_type
:
9422 return "DW_TAG_base_type";
9423 case DW_TAG_catch_block
:
9424 return "DW_TAG_catch_block";
9425 case DW_TAG_const_type
:
9426 return "DW_TAG_const_type";
9427 case DW_TAG_constant
:
9428 return "DW_TAG_constant";
9429 case DW_TAG_enumerator
:
9430 return "DW_TAG_enumerator";
9431 case DW_TAG_file_type
:
9432 return "DW_TAG_file_type";
9434 return "DW_TAG_friend";
9435 case DW_TAG_namelist
:
9436 return "DW_TAG_namelist";
9437 case DW_TAG_namelist_item
:
9438 return "DW_TAG_namelist_item";
9439 case DW_TAG_packed_type
:
9440 return "DW_TAG_packed_type";
9441 case DW_TAG_subprogram
:
9442 return "DW_TAG_subprogram";
9443 case DW_TAG_template_type_param
:
9444 return "DW_TAG_template_type_param";
9445 case DW_TAG_template_value_param
:
9446 return "DW_TAG_template_value_param";
9447 case DW_TAG_thrown_type
:
9448 return "DW_TAG_thrown_type";
9449 case DW_TAG_try_block
:
9450 return "DW_TAG_try_block";
9451 case DW_TAG_variant_part
:
9452 return "DW_TAG_variant_part";
9453 case DW_TAG_variable
:
9454 return "DW_TAG_variable";
9455 case DW_TAG_volatile_type
:
9456 return "DW_TAG_volatile_type";
9457 case DW_TAG_dwarf_procedure
:
9458 return "DW_TAG_dwarf_procedure";
9459 case DW_TAG_restrict_type
:
9460 return "DW_TAG_restrict_type";
9461 case DW_TAG_interface_type
:
9462 return "DW_TAG_interface_type";
9463 case DW_TAG_namespace
:
9464 return "DW_TAG_namespace";
9465 case DW_TAG_imported_module
:
9466 return "DW_TAG_imported_module";
9467 case DW_TAG_unspecified_type
:
9468 return "DW_TAG_unspecified_type";
9469 case DW_TAG_partial_unit
:
9470 return "DW_TAG_partial_unit";
9471 case DW_TAG_imported_unit
:
9472 return "DW_TAG_imported_unit";
9473 case DW_TAG_condition
:
9474 return "DW_TAG_condition";
9475 case DW_TAG_shared_type
:
9476 return "DW_TAG_shared_type";
9477 case DW_TAG_type_unit
:
9478 return "DW_TAG_type_unit";
9479 case DW_TAG_MIPS_loop
:
9480 return "DW_TAG_MIPS_loop";
9481 case DW_TAG_HP_array_descriptor
:
9482 return "DW_TAG_HP_array_descriptor";
9483 case DW_TAG_format_label
:
9484 return "DW_TAG_format_label";
9485 case DW_TAG_function_template
:
9486 return "DW_TAG_function_template";
9487 case DW_TAG_class_template
:
9488 return "DW_TAG_class_template";
9489 case DW_TAG_GNU_BINCL
:
9490 return "DW_TAG_GNU_BINCL";
9491 case DW_TAG_GNU_EINCL
:
9492 return "DW_TAG_GNU_EINCL";
9493 case DW_TAG_upc_shared_type
:
9494 return "DW_TAG_upc_shared_type";
9495 case DW_TAG_upc_strict_type
:
9496 return "DW_TAG_upc_strict_type";
9497 case DW_TAG_upc_relaxed_type
:
9498 return "DW_TAG_upc_relaxed_type";
9499 case DW_TAG_PGI_kanji_type
:
9500 return "DW_TAG_PGI_kanji_type";
9501 case DW_TAG_PGI_interface_block
:
9502 return "DW_TAG_PGI_interface_block";
9504 return "DW_TAG_<unknown>";
9508 /* Convert a DWARF attribute code into its string name. */
9511 dwarf_attr_name (unsigned attr
)
9516 return "DW_AT_sibling";
9517 case DW_AT_location
:
9518 return "DW_AT_location";
9520 return "DW_AT_name";
9521 case DW_AT_ordering
:
9522 return "DW_AT_ordering";
9523 case DW_AT_subscr_data
:
9524 return "DW_AT_subscr_data";
9525 case DW_AT_byte_size
:
9526 return "DW_AT_byte_size";
9527 case DW_AT_bit_offset
:
9528 return "DW_AT_bit_offset";
9529 case DW_AT_bit_size
:
9530 return "DW_AT_bit_size";
9531 case DW_AT_element_list
:
9532 return "DW_AT_element_list";
9533 case DW_AT_stmt_list
:
9534 return "DW_AT_stmt_list";
9536 return "DW_AT_low_pc";
9538 return "DW_AT_high_pc";
9539 case DW_AT_language
:
9540 return "DW_AT_language";
9542 return "DW_AT_member";
9544 return "DW_AT_discr";
9545 case DW_AT_discr_value
:
9546 return "DW_AT_discr_value";
9547 case DW_AT_visibility
:
9548 return "DW_AT_visibility";
9550 return "DW_AT_import";
9551 case DW_AT_string_length
:
9552 return "DW_AT_string_length";
9553 case DW_AT_common_reference
:
9554 return "DW_AT_common_reference";
9555 case DW_AT_comp_dir
:
9556 return "DW_AT_comp_dir";
9557 case DW_AT_const_value
:
9558 return "DW_AT_const_value";
9559 case DW_AT_containing_type
:
9560 return "DW_AT_containing_type";
9561 case DW_AT_default_value
:
9562 return "DW_AT_default_value";
9564 return "DW_AT_inline";
9565 case DW_AT_is_optional
:
9566 return "DW_AT_is_optional";
9567 case DW_AT_lower_bound
:
9568 return "DW_AT_lower_bound";
9569 case DW_AT_producer
:
9570 return "DW_AT_producer";
9571 case DW_AT_prototyped
:
9572 return "DW_AT_prototyped";
9573 case DW_AT_return_addr
:
9574 return "DW_AT_return_addr";
9575 case DW_AT_start_scope
:
9576 return "DW_AT_start_scope";
9577 case DW_AT_bit_stride
:
9578 return "DW_AT_bit_stride";
9579 case DW_AT_upper_bound
:
9580 return "DW_AT_upper_bound";
9581 case DW_AT_abstract_origin
:
9582 return "DW_AT_abstract_origin";
9583 case DW_AT_accessibility
:
9584 return "DW_AT_accessibility";
9585 case DW_AT_address_class
:
9586 return "DW_AT_address_class";
9587 case DW_AT_artificial
:
9588 return "DW_AT_artificial";
9589 case DW_AT_base_types
:
9590 return "DW_AT_base_types";
9591 case DW_AT_calling_convention
:
9592 return "DW_AT_calling_convention";
9594 return "DW_AT_count";
9595 case DW_AT_data_member_location
:
9596 return "DW_AT_data_member_location";
9597 case DW_AT_decl_column
:
9598 return "DW_AT_decl_column";
9599 case DW_AT_decl_file
:
9600 return "DW_AT_decl_file";
9601 case DW_AT_decl_line
:
9602 return "DW_AT_decl_line";
9603 case DW_AT_declaration
:
9604 return "DW_AT_declaration";
9605 case DW_AT_discr_list
:
9606 return "DW_AT_discr_list";
9607 case DW_AT_encoding
:
9608 return "DW_AT_encoding";
9609 case DW_AT_external
:
9610 return "DW_AT_external";
9611 case DW_AT_frame_base
:
9612 return "DW_AT_frame_base";
9614 return "DW_AT_friend";
9615 case DW_AT_identifier_case
:
9616 return "DW_AT_identifier_case";
9617 case DW_AT_macro_info
:
9618 return "DW_AT_macro_info";
9619 case DW_AT_namelist_items
:
9620 return "DW_AT_namelist_items";
9621 case DW_AT_priority
:
9622 return "DW_AT_priority";
9624 return "DW_AT_segment";
9625 case DW_AT_specification
:
9626 return "DW_AT_specification";
9627 case DW_AT_static_link
:
9628 return "DW_AT_static_link";
9630 return "DW_AT_type";
9631 case DW_AT_use_location
:
9632 return "DW_AT_use_location";
9633 case DW_AT_variable_parameter
:
9634 return "DW_AT_variable_parameter";
9635 case DW_AT_virtuality
:
9636 return "DW_AT_virtuality";
9637 case DW_AT_vtable_elem_location
:
9638 return "DW_AT_vtable_elem_location";
9639 /* DWARF 3 values. */
9640 case DW_AT_allocated
:
9641 return "DW_AT_allocated";
9642 case DW_AT_associated
:
9643 return "DW_AT_associated";
9644 case DW_AT_data_location
:
9645 return "DW_AT_data_location";
9646 case DW_AT_byte_stride
:
9647 return "DW_AT_byte_stride";
9648 case DW_AT_entry_pc
:
9649 return "DW_AT_entry_pc";
9650 case DW_AT_use_UTF8
:
9651 return "DW_AT_use_UTF8";
9652 case DW_AT_extension
:
9653 return "DW_AT_extension";
9655 return "DW_AT_ranges";
9656 case DW_AT_trampoline
:
9657 return "DW_AT_trampoline";
9658 case DW_AT_call_column
:
9659 return "DW_AT_call_column";
9660 case DW_AT_call_file
:
9661 return "DW_AT_call_file";
9662 case DW_AT_call_line
:
9663 return "DW_AT_call_line";
9664 case DW_AT_description
:
9665 return "DW_AT_description";
9666 case DW_AT_binary_scale
:
9667 return "DW_AT_binary_scale";
9668 case DW_AT_decimal_scale
:
9669 return "DW_AT_decimal_scale";
9671 return "DW_AT_small";
9672 case DW_AT_decimal_sign
:
9673 return "DW_AT_decimal_sign";
9674 case DW_AT_digit_count
:
9675 return "DW_AT_digit_count";
9676 case DW_AT_picture_string
:
9677 return "DW_AT_picture_string";
9679 return "DW_AT_mutable";
9680 case DW_AT_threads_scaled
:
9681 return "DW_AT_threads_scaled";
9682 case DW_AT_explicit
:
9683 return "DW_AT_explicit";
9684 case DW_AT_object_pointer
:
9685 return "DW_AT_object_pointer";
9686 case DW_AT_endianity
:
9687 return "DW_AT_endianity";
9688 case DW_AT_elemental
:
9689 return "DW_AT_elemental";
9691 return "DW_AT_pure";
9692 case DW_AT_recursive
:
9693 return "DW_AT_recursive";
9694 /* DWARF 4 values. */
9695 case DW_AT_signature
:
9696 return "DW_AT_signature";
9697 case DW_AT_linkage_name
:
9698 return "DW_AT_linkage_name";
9699 /* SGI/MIPS extensions. */
9700 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9701 case DW_AT_MIPS_fde
:
9702 return "DW_AT_MIPS_fde";
9704 case DW_AT_MIPS_loop_begin
:
9705 return "DW_AT_MIPS_loop_begin";
9706 case DW_AT_MIPS_tail_loop_begin
:
9707 return "DW_AT_MIPS_tail_loop_begin";
9708 case DW_AT_MIPS_epilog_begin
:
9709 return "DW_AT_MIPS_epilog_begin";
9710 case DW_AT_MIPS_loop_unroll_factor
:
9711 return "DW_AT_MIPS_loop_unroll_factor";
9712 case DW_AT_MIPS_software_pipeline_depth
:
9713 return "DW_AT_MIPS_software_pipeline_depth";
9714 case DW_AT_MIPS_linkage_name
:
9715 return "DW_AT_MIPS_linkage_name";
9716 case DW_AT_MIPS_stride
:
9717 return "DW_AT_MIPS_stride";
9718 case DW_AT_MIPS_abstract_name
:
9719 return "DW_AT_MIPS_abstract_name";
9720 case DW_AT_MIPS_clone_origin
:
9721 return "DW_AT_MIPS_clone_origin";
9722 case DW_AT_MIPS_has_inlines
:
9723 return "DW_AT_MIPS_has_inlines";
9724 /* HP extensions. */
9725 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9726 case DW_AT_HP_block_index
:
9727 return "DW_AT_HP_block_index";
9729 case DW_AT_HP_unmodifiable
:
9730 return "DW_AT_HP_unmodifiable";
9731 case DW_AT_HP_actuals_stmt_list
:
9732 return "DW_AT_HP_actuals_stmt_list";
9733 case DW_AT_HP_proc_per_section
:
9734 return "DW_AT_HP_proc_per_section";
9735 case DW_AT_HP_raw_data_ptr
:
9736 return "DW_AT_HP_raw_data_ptr";
9737 case DW_AT_HP_pass_by_reference
:
9738 return "DW_AT_HP_pass_by_reference";
9739 case DW_AT_HP_opt_level
:
9740 return "DW_AT_HP_opt_level";
9741 case DW_AT_HP_prof_version_id
:
9742 return "DW_AT_HP_prof_version_id";
9743 case DW_AT_HP_opt_flags
:
9744 return "DW_AT_HP_opt_flags";
9745 case DW_AT_HP_cold_region_low_pc
:
9746 return "DW_AT_HP_cold_region_low_pc";
9747 case DW_AT_HP_cold_region_high_pc
:
9748 return "DW_AT_HP_cold_region_high_pc";
9749 case DW_AT_HP_all_variables_modifiable
:
9750 return "DW_AT_HP_all_variables_modifiable";
9751 case DW_AT_HP_linkage_name
:
9752 return "DW_AT_HP_linkage_name";
9753 case DW_AT_HP_prof_flags
:
9754 return "DW_AT_HP_prof_flags";
9755 /* GNU extensions. */
9756 case DW_AT_sf_names
:
9757 return "DW_AT_sf_names";
9758 case DW_AT_src_info
:
9759 return "DW_AT_src_info";
9760 case DW_AT_mac_info
:
9761 return "DW_AT_mac_info";
9762 case DW_AT_src_coords
:
9763 return "DW_AT_src_coords";
9764 case DW_AT_body_begin
:
9765 return "DW_AT_body_begin";
9766 case DW_AT_body_end
:
9767 return "DW_AT_body_end";
9768 case DW_AT_GNU_vector
:
9769 return "DW_AT_GNU_vector";
9770 /* VMS extensions. */
9771 case DW_AT_VMS_rtnbeg_pd_address
:
9772 return "DW_AT_VMS_rtnbeg_pd_address";
9773 /* UPC extension. */
9774 case DW_AT_upc_threads_scaled
:
9775 return "DW_AT_upc_threads_scaled";
9776 /* PGI (STMicroelectronics) extensions. */
9777 case DW_AT_PGI_lbase
:
9778 return "DW_AT_PGI_lbase";
9779 case DW_AT_PGI_soffset
:
9780 return "DW_AT_PGI_soffset";
9781 case DW_AT_PGI_lstride
:
9782 return "DW_AT_PGI_lstride";
9784 return "DW_AT_<unknown>";
9788 /* Convert a DWARF value form code into its string name. */
9791 dwarf_form_name (unsigned form
)
9796 return "DW_FORM_addr";
9797 case DW_FORM_block2
:
9798 return "DW_FORM_block2";
9799 case DW_FORM_block4
:
9800 return "DW_FORM_block4";
9802 return "DW_FORM_data2";
9804 return "DW_FORM_data4";
9806 return "DW_FORM_data8";
9807 case DW_FORM_string
:
9808 return "DW_FORM_string";
9810 return "DW_FORM_block";
9811 case DW_FORM_block1
:
9812 return "DW_FORM_block1";
9814 return "DW_FORM_data1";
9816 return "DW_FORM_flag";
9818 return "DW_FORM_sdata";
9820 return "DW_FORM_strp";
9822 return "DW_FORM_udata";
9823 case DW_FORM_ref_addr
:
9824 return "DW_FORM_ref_addr";
9826 return "DW_FORM_ref1";
9828 return "DW_FORM_ref2";
9830 return "DW_FORM_ref4";
9832 return "DW_FORM_ref8";
9833 case DW_FORM_ref_udata
:
9834 return "DW_FORM_ref_udata";
9835 case DW_FORM_indirect
:
9836 return "DW_FORM_indirect";
9837 case DW_FORM_sec_offset
:
9838 return "DW_FORM_sec_offset";
9839 case DW_FORM_exprloc
:
9840 return "DW_FORM_exprloc";
9841 case DW_FORM_flag_present
:
9842 return "DW_FORM_flag_present";
9844 return "DW_FORM_sig8";
9846 return "DW_FORM_<unknown>";
9850 /* Convert a DWARF stack opcode into its string name. */
9853 dwarf_stack_op_name (unsigned op
)
9858 return "DW_OP_addr";
9860 return "DW_OP_deref";
9862 return "DW_OP_const1u";
9864 return "DW_OP_const1s";
9866 return "DW_OP_const2u";
9868 return "DW_OP_const2s";
9870 return "DW_OP_const4u";
9872 return "DW_OP_const4s";
9874 return "DW_OP_const8u";
9876 return "DW_OP_const8s";
9878 return "DW_OP_constu";
9880 return "DW_OP_consts";
9884 return "DW_OP_drop";
9886 return "DW_OP_over";
9888 return "DW_OP_pick";
9890 return "DW_OP_swap";
9894 return "DW_OP_xderef";
9902 return "DW_OP_minus";
9914 return "DW_OP_plus";
9915 case DW_OP_plus_uconst
:
9916 return "DW_OP_plus_uconst";
9922 return "DW_OP_shra";
9940 return "DW_OP_skip";
9942 return "DW_OP_lit0";
9944 return "DW_OP_lit1";
9946 return "DW_OP_lit2";
9948 return "DW_OP_lit3";
9950 return "DW_OP_lit4";
9952 return "DW_OP_lit5";
9954 return "DW_OP_lit6";
9956 return "DW_OP_lit7";
9958 return "DW_OP_lit8";
9960 return "DW_OP_lit9";
9962 return "DW_OP_lit10";
9964 return "DW_OP_lit11";
9966 return "DW_OP_lit12";
9968 return "DW_OP_lit13";
9970 return "DW_OP_lit14";
9972 return "DW_OP_lit15";
9974 return "DW_OP_lit16";
9976 return "DW_OP_lit17";
9978 return "DW_OP_lit18";
9980 return "DW_OP_lit19";
9982 return "DW_OP_lit20";
9984 return "DW_OP_lit21";
9986 return "DW_OP_lit22";
9988 return "DW_OP_lit23";
9990 return "DW_OP_lit24";
9992 return "DW_OP_lit25";
9994 return "DW_OP_lit26";
9996 return "DW_OP_lit27";
9998 return "DW_OP_lit28";
10000 return "DW_OP_lit29";
10002 return "DW_OP_lit30";
10004 return "DW_OP_lit31";
10006 return "DW_OP_reg0";
10008 return "DW_OP_reg1";
10010 return "DW_OP_reg2";
10012 return "DW_OP_reg3";
10014 return "DW_OP_reg4";
10016 return "DW_OP_reg5";
10018 return "DW_OP_reg6";
10020 return "DW_OP_reg7";
10022 return "DW_OP_reg8";
10024 return "DW_OP_reg9";
10026 return "DW_OP_reg10";
10028 return "DW_OP_reg11";
10030 return "DW_OP_reg12";
10032 return "DW_OP_reg13";
10034 return "DW_OP_reg14";
10036 return "DW_OP_reg15";
10038 return "DW_OP_reg16";
10040 return "DW_OP_reg17";
10042 return "DW_OP_reg18";
10044 return "DW_OP_reg19";
10046 return "DW_OP_reg20";
10048 return "DW_OP_reg21";
10050 return "DW_OP_reg22";
10052 return "DW_OP_reg23";
10054 return "DW_OP_reg24";
10056 return "DW_OP_reg25";
10058 return "DW_OP_reg26";
10060 return "DW_OP_reg27";
10062 return "DW_OP_reg28";
10064 return "DW_OP_reg29";
10066 return "DW_OP_reg30";
10068 return "DW_OP_reg31";
10070 return "DW_OP_breg0";
10072 return "DW_OP_breg1";
10074 return "DW_OP_breg2";
10076 return "DW_OP_breg3";
10078 return "DW_OP_breg4";
10080 return "DW_OP_breg5";
10082 return "DW_OP_breg6";
10084 return "DW_OP_breg7";
10086 return "DW_OP_breg8";
10088 return "DW_OP_breg9";
10090 return "DW_OP_breg10";
10092 return "DW_OP_breg11";
10094 return "DW_OP_breg12";
10096 return "DW_OP_breg13";
10098 return "DW_OP_breg14";
10100 return "DW_OP_breg15";
10102 return "DW_OP_breg16";
10104 return "DW_OP_breg17";
10106 return "DW_OP_breg18";
10108 return "DW_OP_breg19";
10110 return "DW_OP_breg20";
10112 return "DW_OP_breg21";
10114 return "DW_OP_breg22";
10116 return "DW_OP_breg23";
10118 return "DW_OP_breg24";
10120 return "DW_OP_breg25";
10122 return "DW_OP_breg26";
10124 return "DW_OP_breg27";
10126 return "DW_OP_breg28";
10128 return "DW_OP_breg29";
10130 return "DW_OP_breg30";
10132 return "DW_OP_breg31";
10134 return "DW_OP_regx";
10136 return "DW_OP_fbreg";
10138 return "DW_OP_bregx";
10140 return "DW_OP_piece";
10141 case DW_OP_deref_size
:
10142 return "DW_OP_deref_size";
10143 case DW_OP_xderef_size
:
10144 return "DW_OP_xderef_size";
10146 return "DW_OP_nop";
10147 /* DWARF 3 extensions. */
10148 case DW_OP_push_object_address
:
10149 return "DW_OP_push_object_address";
10151 return "DW_OP_call2";
10153 return "DW_OP_call4";
10154 case DW_OP_call_ref
:
10155 return "DW_OP_call_ref";
10156 /* GNU extensions. */
10157 case DW_OP_form_tls_address
:
10158 return "DW_OP_form_tls_address";
10159 case DW_OP_call_frame_cfa
:
10160 return "DW_OP_call_frame_cfa";
10161 case DW_OP_bit_piece
:
10162 return "DW_OP_bit_piece";
10163 case DW_OP_GNU_push_tls_address
:
10164 return "DW_OP_GNU_push_tls_address";
10165 case DW_OP_GNU_uninit
:
10166 return "DW_OP_GNU_uninit";
10167 /* HP extensions. */
10168 case DW_OP_HP_is_value
:
10169 return "DW_OP_HP_is_value";
10170 case DW_OP_HP_fltconst4
:
10171 return "DW_OP_HP_fltconst4";
10172 case DW_OP_HP_fltconst8
:
10173 return "DW_OP_HP_fltconst8";
10174 case DW_OP_HP_mod_range
:
10175 return "DW_OP_HP_mod_range";
10176 case DW_OP_HP_unmod_range
:
10177 return "DW_OP_HP_unmod_range";
10179 return "DW_OP_HP_tls";
10181 return "OP_<unknown>";
10186 dwarf_bool_name (unsigned mybool
)
10194 /* Convert a DWARF type code into its string name. */
10197 dwarf_type_encoding_name (unsigned enc
)
10202 return "DW_ATE_void";
10203 case DW_ATE_address
:
10204 return "DW_ATE_address";
10205 case DW_ATE_boolean
:
10206 return "DW_ATE_boolean";
10207 case DW_ATE_complex_float
:
10208 return "DW_ATE_complex_float";
10210 return "DW_ATE_float";
10211 case DW_ATE_signed
:
10212 return "DW_ATE_signed";
10213 case DW_ATE_signed_char
:
10214 return "DW_ATE_signed_char";
10215 case DW_ATE_unsigned
:
10216 return "DW_ATE_unsigned";
10217 case DW_ATE_unsigned_char
:
10218 return "DW_ATE_unsigned_char";
10220 case DW_ATE_imaginary_float
:
10221 return "DW_ATE_imaginary_float";
10222 case DW_ATE_packed_decimal
:
10223 return "DW_ATE_packed_decimal";
10224 case DW_ATE_numeric_string
:
10225 return "DW_ATE_numeric_string";
10226 case DW_ATE_edited
:
10227 return "DW_ATE_edited";
10228 case DW_ATE_signed_fixed
:
10229 return "DW_ATE_signed_fixed";
10230 case DW_ATE_unsigned_fixed
:
10231 return "DW_ATE_unsigned_fixed";
10232 case DW_ATE_decimal_float
:
10233 return "DW_ATE_decimal_float";
10234 /* HP extensions. */
10235 case DW_ATE_HP_float80
:
10236 return "DW_ATE_HP_float80";
10237 case DW_ATE_HP_complex_float80
:
10238 return "DW_ATE_HP_complex_float80";
10239 case DW_ATE_HP_float128
:
10240 return "DW_ATE_HP_float128";
10241 case DW_ATE_HP_complex_float128
:
10242 return "DW_ATE_HP_complex_float128";
10243 case DW_ATE_HP_floathpintel
:
10244 return "DW_ATE_HP_floathpintel";
10245 case DW_ATE_HP_imaginary_float80
:
10246 return "DW_ATE_HP_imaginary_float80";
10247 case DW_ATE_HP_imaginary_float128
:
10248 return "DW_ATE_HP_imaginary_float128";
10250 return "DW_ATE_<unknown>";
10254 /* Convert a DWARF call frame info operation to its string name. */
10258 dwarf_cfi_name (unsigned cfi_opc
)
10262 case DW_CFA_advance_loc
:
10263 return "DW_CFA_advance_loc";
10264 case DW_CFA_offset
:
10265 return "DW_CFA_offset";
10266 case DW_CFA_restore
:
10267 return "DW_CFA_restore";
10269 return "DW_CFA_nop";
10270 case DW_CFA_set_loc
:
10271 return "DW_CFA_set_loc";
10272 case DW_CFA_advance_loc1
:
10273 return "DW_CFA_advance_loc1";
10274 case DW_CFA_advance_loc2
:
10275 return "DW_CFA_advance_loc2";
10276 case DW_CFA_advance_loc4
:
10277 return "DW_CFA_advance_loc4";
10278 case DW_CFA_offset_extended
:
10279 return "DW_CFA_offset_extended";
10280 case DW_CFA_restore_extended
:
10281 return "DW_CFA_restore_extended";
10282 case DW_CFA_undefined
:
10283 return "DW_CFA_undefined";
10284 case DW_CFA_same_value
:
10285 return "DW_CFA_same_value";
10286 case DW_CFA_register
:
10287 return "DW_CFA_register";
10288 case DW_CFA_remember_state
:
10289 return "DW_CFA_remember_state";
10290 case DW_CFA_restore_state
:
10291 return "DW_CFA_restore_state";
10292 case DW_CFA_def_cfa
:
10293 return "DW_CFA_def_cfa";
10294 case DW_CFA_def_cfa_register
:
10295 return "DW_CFA_def_cfa_register";
10296 case DW_CFA_def_cfa_offset
:
10297 return "DW_CFA_def_cfa_offset";
10299 case DW_CFA_def_cfa_expression
:
10300 return "DW_CFA_def_cfa_expression";
10301 case DW_CFA_expression
:
10302 return "DW_CFA_expression";
10303 case DW_CFA_offset_extended_sf
:
10304 return "DW_CFA_offset_extended_sf";
10305 case DW_CFA_def_cfa_sf
:
10306 return "DW_CFA_def_cfa_sf";
10307 case DW_CFA_def_cfa_offset_sf
:
10308 return "DW_CFA_def_cfa_offset_sf";
10309 case DW_CFA_val_offset
:
10310 return "DW_CFA_val_offset";
10311 case DW_CFA_val_offset_sf
:
10312 return "DW_CFA_val_offset_sf";
10313 case DW_CFA_val_expression
:
10314 return "DW_CFA_val_expression";
10315 /* SGI/MIPS specific. */
10316 case DW_CFA_MIPS_advance_loc8
:
10317 return "DW_CFA_MIPS_advance_loc8";
10318 /* GNU extensions. */
10319 case DW_CFA_GNU_window_save
:
10320 return "DW_CFA_GNU_window_save";
10321 case DW_CFA_GNU_args_size
:
10322 return "DW_CFA_GNU_args_size";
10323 case DW_CFA_GNU_negative_offset_extended
:
10324 return "DW_CFA_GNU_negative_offset_extended";
10326 return "DW_CFA_<unknown>";
10332 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10336 print_spaces (indent
, f
);
10337 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10338 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10340 if (die
->parent
!= NULL
)
10342 print_spaces (indent
, f
);
10343 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10344 die
->parent
->offset
);
10347 print_spaces (indent
, f
);
10348 fprintf_unfiltered (f
, " has children: %s\n",
10349 dwarf_bool_name (die
->child
!= NULL
));
10351 print_spaces (indent
, f
);
10352 fprintf_unfiltered (f
, " attributes:\n");
10354 for (i
= 0; i
< die
->num_attrs
; ++i
)
10356 print_spaces (indent
, f
);
10357 fprintf_unfiltered (f
, " %s (%s) ",
10358 dwarf_attr_name (die
->attrs
[i
].name
),
10359 dwarf_form_name (die
->attrs
[i
].form
));
10361 switch (die
->attrs
[i
].form
)
10363 case DW_FORM_ref_addr
:
10365 fprintf_unfiltered (f
, "address: ");
10366 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10368 case DW_FORM_block2
:
10369 case DW_FORM_block4
:
10370 case DW_FORM_block
:
10371 case DW_FORM_block1
:
10372 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10374 case DW_FORM_exprloc
:
10375 fprintf_unfiltered (f
, "expression: size %u",
10376 DW_BLOCK (&die
->attrs
[i
])->size
);
10381 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10382 (long) (DW_ADDR (&die
->attrs
[i
])));
10384 case DW_FORM_data1
:
10385 case DW_FORM_data2
:
10386 case DW_FORM_data4
:
10387 case DW_FORM_data8
:
10388 case DW_FORM_udata
:
10389 case DW_FORM_sdata
:
10390 fprintf_unfiltered (f
, "constant: %s",
10391 pulongest (DW_UNSND (&die
->attrs
[i
])));
10393 case DW_FORM_sec_offset
:
10394 fprintf_unfiltered (f
, "section offset: %s",
10395 pulongest (DW_UNSND (&die
->attrs
[i
])));
10398 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10399 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10400 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10402 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10404 case DW_FORM_string
:
10406 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10407 DW_STRING (&die
->attrs
[i
])
10408 ? DW_STRING (&die
->attrs
[i
]) : "",
10409 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10412 if (DW_UNSND (&die
->attrs
[i
]))
10413 fprintf_unfiltered (f
, "flag: TRUE");
10415 fprintf_unfiltered (f
, "flag: FALSE");
10417 case DW_FORM_flag_present
:
10418 fprintf_unfiltered (f
, "flag: TRUE");
10420 case DW_FORM_indirect
:
10421 /* the reader will have reduced the indirect form to
10422 the "base form" so this form should not occur */
10423 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10426 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10427 die
->attrs
[i
].form
);
10430 fprintf_unfiltered (f
, "\n");
10435 dump_die_for_error (struct die_info
*die
)
10437 dump_die_shallow (gdb_stderr
, 0, die
);
10441 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10443 int indent
= level
* 4;
10445 gdb_assert (die
!= NULL
);
10447 if (level
>= max_level
)
10450 dump_die_shallow (f
, indent
, die
);
10452 if (die
->child
!= NULL
)
10454 print_spaces (indent
, f
);
10455 fprintf_unfiltered (f
, " Children:");
10456 if (level
+ 1 < max_level
)
10458 fprintf_unfiltered (f
, "\n");
10459 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10463 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10467 if (die
->sibling
!= NULL
&& level
> 0)
10469 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10473 /* This is called from the pdie macro in gdbinit.in.
10474 It's not static so gcc will keep a copy callable from gdb. */
10477 dump_die (struct die_info
*die
, int max_level
)
10479 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10483 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10487 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10493 is_ref_attr (struct attribute
*attr
)
10495 switch (attr
->form
)
10497 case DW_FORM_ref_addr
:
10502 case DW_FORM_ref_udata
:
10509 static unsigned int
10510 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10512 if (is_ref_attr (attr
))
10513 return DW_ADDR (attr
);
10515 complaint (&symfile_complaints
,
10516 _("unsupported die ref attribute form: '%s'"),
10517 dwarf_form_name (attr
->form
));
10521 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
10522 * the value held by the attribute is not constant. */
10525 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10527 if (attr
->form
== DW_FORM_sdata
)
10528 return DW_SND (attr
);
10529 else if (attr
->form
== DW_FORM_udata
10530 || attr
->form
== DW_FORM_data1
10531 || attr
->form
== DW_FORM_data2
10532 || attr
->form
== DW_FORM_data4
10533 || attr
->form
== DW_FORM_data8
)
10534 return DW_UNSND (attr
);
10537 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10538 dwarf_form_name (attr
->form
));
10539 return default_value
;
10543 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10544 unit and add it to our queue.
10545 The result is non-zero if PER_CU was queued, otherwise the result is zero
10546 meaning either PER_CU is already queued or it is already loaded. */
10549 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10550 struct dwarf2_per_cu_data
*per_cu
)
10552 /* Mark the dependence relation so that we don't flush PER_CU
10554 dwarf2_add_dependence (this_cu
, per_cu
);
10556 /* If it's already on the queue, we have nothing to do. */
10557 if (per_cu
->queued
)
10560 /* If the compilation unit is already loaded, just mark it as
10562 if (per_cu
->cu
!= NULL
)
10564 per_cu
->cu
->last_used
= 0;
10568 /* Add it to the queue. */
10569 queue_comp_unit (per_cu
, this_cu
->objfile
);
10574 /* Follow reference or signature attribute ATTR of SRC_DIE.
10575 On entry *REF_CU is the CU of SRC_DIE.
10576 On exit *REF_CU is the CU of the result. */
10578 static struct die_info
*
10579 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10580 struct dwarf2_cu
**ref_cu
)
10582 struct die_info
*die
;
10584 if (is_ref_attr (attr
))
10585 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10586 else if (attr
->form
== DW_FORM_sig8
)
10587 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10590 dump_die_for_error (src_die
);
10591 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10592 (*ref_cu
)->objfile
->name
);
10598 /* Follow reference attribute ATTR of SRC_DIE.
10599 On entry *REF_CU is the CU of SRC_DIE.
10600 On exit *REF_CU is the CU of the result. */
10602 static struct die_info
*
10603 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10604 struct dwarf2_cu
**ref_cu
)
10606 struct die_info
*die
;
10607 unsigned int offset
;
10608 struct die_info temp_die
;
10609 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10611 gdb_assert (cu
->per_cu
!= NULL
);
10613 offset
= dwarf2_get_ref_die_offset (attr
);
10615 if (cu
->per_cu
->from_debug_types
)
10617 /* .debug_types CUs cannot reference anything outside their CU.
10618 If they need to, they have to reference a signatured type via
10620 if (! offset_in_cu_p (&cu
->header
, offset
))
10624 else if (! offset_in_cu_p (&cu
->header
, offset
))
10626 struct dwarf2_per_cu_data
*per_cu
;
10627 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10629 /* If necessary, add it to the queue and load its DIEs. */
10630 if (maybe_queue_comp_unit (cu
, per_cu
))
10631 load_full_comp_unit (per_cu
, cu
->objfile
);
10633 target_cu
= per_cu
->cu
;
10638 *ref_cu
= target_cu
;
10639 temp_die
.offset
= offset
;
10640 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10646 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10647 "at 0x%x [in module %s]"),
10648 offset
, src_die
->offset
, cu
->objfile
->name
);
10651 /* Follow the signature attribute ATTR in SRC_DIE.
10652 On entry *REF_CU is the CU of SRC_DIE.
10653 On exit *REF_CU is the CU of the result. */
10655 static struct die_info
*
10656 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10657 struct dwarf2_cu
**ref_cu
)
10659 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10660 struct die_info temp_die
;
10661 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10662 struct dwarf2_cu
*sig_cu
;
10663 struct die_info
*die
;
10665 /* sig_type will be NULL if the signatured type is missing from
10667 if (sig_type
== NULL
)
10668 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10669 "at 0x%x [in module %s]"),
10670 src_die
->offset
, objfile
->name
);
10672 /* If necessary, add it to the queue and load its DIEs. */
10674 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10675 read_signatured_type (objfile
, sig_type
);
10677 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10679 sig_cu
= sig_type
->per_cu
.cu
;
10680 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10681 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10688 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10689 "at 0x%x [in module %s]"),
10690 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10693 /* Given an offset of a signatured type, return its signatured_type. */
10695 static struct signatured_type
*
10696 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10698 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10699 unsigned int length
, initial_length_size
;
10700 unsigned int sig_offset
;
10701 struct signatured_type find_entry
, *type_sig
;
10703 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10704 sig_offset
= (initial_length_size
10706 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10707 + 1 /*address_size*/);
10708 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10709 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10711 /* This is only used to lookup previously recorded types.
10712 If we didn't find it, it's our bug. */
10713 gdb_assert (type_sig
!= NULL
);
10714 gdb_assert (offset
== type_sig
->offset
);
10719 /* Read in signatured type at OFFSET and build its CU and die(s). */
10722 read_signatured_type_at_offset (struct objfile
*objfile
,
10723 unsigned int offset
)
10725 struct signatured_type
*type_sig
;
10727 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
10729 /* We have the section offset, but we need the signature to do the
10730 hash table lookup. */
10731 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10733 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10735 read_signatured_type (objfile
, type_sig
);
10737 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10740 /* Read in a signatured type and build its CU and DIEs. */
10743 read_signatured_type (struct objfile
*objfile
,
10744 struct signatured_type
*type_sig
)
10746 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10747 struct die_reader_specs reader_specs
;
10748 struct dwarf2_cu
*cu
;
10749 ULONGEST signature
;
10750 struct cleanup
*back_to
, *free_cu_cleanup
;
10751 struct attribute
*attr
;
10753 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10755 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10756 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10757 obstack_init (&cu
->comp_unit_obstack
);
10758 cu
->objfile
= objfile
;
10759 type_sig
->per_cu
.cu
= cu
;
10760 cu
->per_cu
= &type_sig
->per_cu
;
10762 /* If an error occurs while loading, release our storage. */
10763 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10765 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10766 types_ptr
, objfile
->obfd
);
10767 gdb_assert (signature
== type_sig
->signature
);
10770 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10774 &cu
->comp_unit_obstack
,
10775 hashtab_obstack_allocate
,
10776 dummy_obstack_deallocate
);
10778 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10779 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10781 init_cu_die_reader (&reader_specs
, cu
);
10783 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10786 /* We try not to read any attributes in this function, because not
10787 all objfiles needed for references have been loaded yet, and symbol
10788 table processing isn't initialized. But we have to set the CU language,
10789 or we won't be able to build types correctly. */
10790 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10792 set_cu_language (DW_UNSND (attr
), cu
);
10794 set_cu_language (language_minimal
, cu
);
10796 do_cleanups (back_to
);
10798 /* We've successfully allocated this compilation unit. Let our caller
10799 clean it up when finished with it. */
10800 discard_cleanups (free_cu_cleanup
);
10802 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10803 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10806 /* Decode simple location descriptions.
10807 Given a pointer to a dwarf block that defines a location, compute
10808 the location and return the value.
10810 NOTE drow/2003-11-18: This function is called in two situations
10811 now: for the address of static or global variables (partial symbols
10812 only) and for offsets into structures which are expected to be
10813 (more or less) constant. The partial symbol case should go away,
10814 and only the constant case should remain. That will let this
10815 function complain more accurately. A few special modes are allowed
10816 without complaint for global variables (for instance, global
10817 register values and thread-local values).
10819 A location description containing no operations indicates that the
10820 object is optimized out. The return value is 0 for that case.
10821 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10822 callers will only want a very basic result and this can become a
10825 Note that stack[0] is unused except as a default error return.
10826 Note that stack overflow is not yet handled. */
10829 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10831 struct objfile
*objfile
= cu
->objfile
;
10832 struct comp_unit_head
*cu_header
= &cu
->header
;
10834 int size
= blk
->size
;
10835 gdb_byte
*data
= blk
->data
;
10836 CORE_ADDR stack
[64];
10838 unsigned int bytes_read
, unsnd
;
10882 stack
[++stacki
] = op
- DW_OP_lit0
;
10917 stack
[++stacki
] = op
- DW_OP_reg0
;
10919 dwarf2_complex_location_expr_complaint ();
10923 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10925 stack
[++stacki
] = unsnd
;
10927 dwarf2_complex_location_expr_complaint ();
10931 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10936 case DW_OP_const1u
:
10937 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10941 case DW_OP_const1s
:
10942 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10946 case DW_OP_const2u
:
10947 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10951 case DW_OP_const2s
:
10952 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10956 case DW_OP_const4u
:
10957 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10961 case DW_OP_const4s
:
10962 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10967 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10973 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10978 stack
[stacki
+ 1] = stack
[stacki
];
10983 stack
[stacki
- 1] += stack
[stacki
];
10987 case DW_OP_plus_uconst
:
10988 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10993 stack
[stacki
- 1] -= stack
[stacki
];
10998 /* If we're not the last op, then we definitely can't encode
10999 this using GDB's address_class enum. This is valid for partial
11000 global symbols, although the variable's address will be bogus
11003 dwarf2_complex_location_expr_complaint ();
11006 case DW_OP_GNU_push_tls_address
:
11007 /* The top of the stack has the offset from the beginning
11008 of the thread control block at which the variable is located. */
11009 /* Nothing should follow this operator, so the top of stack would
11011 /* This is valid for partial global symbols, but the variable's
11012 address will be bogus in the psymtab. */
11014 dwarf2_complex_location_expr_complaint ();
11017 case DW_OP_GNU_uninit
:
11021 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
11022 dwarf_stack_op_name (op
));
11023 return (stack
[stacki
]);
11026 return (stack
[stacki
]);
11029 /* memory allocation interface */
11031 static struct dwarf_block
*
11032 dwarf_alloc_block (struct dwarf2_cu
*cu
)
11034 struct dwarf_block
*blk
;
11036 blk
= (struct dwarf_block
*)
11037 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
11041 static struct abbrev_info
*
11042 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
11044 struct abbrev_info
*abbrev
;
11046 abbrev
= (struct abbrev_info
*)
11047 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
11048 memset (abbrev
, 0, sizeof (struct abbrev_info
));
11052 static struct die_info
*
11053 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
11055 struct die_info
*die
;
11056 size_t size
= sizeof (struct die_info
);
11059 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
11061 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
11062 memset (die
, 0, sizeof (struct die_info
));
11067 /* Macro support. */
11070 /* Return the full name of file number I in *LH's file name table.
11071 Use COMP_DIR as the name of the current directory of the
11072 compilation. The result is allocated using xmalloc; the caller is
11073 responsible for freeing it. */
11075 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
11077 /* Is the file number a valid index into the line header's file name
11078 table? Remember that file numbers start with one, not zero. */
11079 if (1 <= file
&& file
<= lh
->num_file_names
)
11081 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
11083 if (IS_ABSOLUTE_PATH (fe
->name
))
11084 return xstrdup (fe
->name
);
11092 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
11098 dir_len
= strlen (dir
);
11099 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
11100 strcpy (full_name
, dir
);
11101 full_name
[dir_len
] = '/';
11102 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
11106 return xstrdup (fe
->name
);
11111 /* The compiler produced a bogus file number. We can at least
11112 record the macro definitions made in the file, even if we
11113 won't be able to find the file by name. */
11114 char fake_name
[80];
11115 sprintf (fake_name
, "<bad macro file number %d>", file
);
11117 complaint (&symfile_complaints
,
11118 _("bad file number in macro information (%d)"),
11121 return xstrdup (fake_name
);
11126 static struct macro_source_file
*
11127 macro_start_file (int file
, int line
,
11128 struct macro_source_file
*current_file
,
11129 const char *comp_dir
,
11130 struct line_header
*lh
, struct objfile
*objfile
)
11132 /* The full name of this source file. */
11133 char *full_name
= file_full_name (file
, lh
, comp_dir
);
11135 /* We don't create a macro table for this compilation unit
11136 at all until we actually get a filename. */
11137 if (! pending_macros
)
11138 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
11139 objfile
->macro_cache
);
11141 if (! current_file
)
11142 /* If we have no current file, then this must be the start_file
11143 directive for the compilation unit's main source file. */
11144 current_file
= macro_set_main (pending_macros
, full_name
);
11146 current_file
= macro_include (current_file
, line
, full_name
);
11150 return current_file
;
11154 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
11155 followed by a null byte. */
11157 copy_string (const char *buf
, int len
)
11159 char *s
= xmalloc (len
+ 1);
11160 memcpy (s
, buf
, len
);
11167 static const char *
11168 consume_improper_spaces (const char *p
, const char *body
)
11172 complaint (&symfile_complaints
,
11173 _("macro definition contains spaces in formal argument list:\n`%s'"),
11185 parse_macro_definition (struct macro_source_file
*file
, int line
,
11190 /* The body string takes one of two forms. For object-like macro
11191 definitions, it should be:
11193 <macro name> " " <definition>
11195 For function-like macro definitions, it should be:
11197 <macro name> "() " <definition>
11199 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
11201 Spaces may appear only where explicitly indicated, and in the
11204 The Dwarf 2 spec says that an object-like macro's name is always
11205 followed by a space, but versions of GCC around March 2002 omit
11206 the space when the macro's definition is the empty string.
11208 The Dwarf 2 spec says that there should be no spaces between the
11209 formal arguments in a function-like macro's formal argument list,
11210 but versions of GCC around March 2002 include spaces after the
11214 /* Find the extent of the macro name. The macro name is terminated
11215 by either a space or null character (for an object-like macro) or
11216 an opening paren (for a function-like macro). */
11217 for (p
= body
; *p
; p
++)
11218 if (*p
== ' ' || *p
== '(')
11221 if (*p
== ' ' || *p
== '\0')
11223 /* It's an object-like macro. */
11224 int name_len
= p
- body
;
11225 char *name
= copy_string (body
, name_len
);
11226 const char *replacement
;
11229 replacement
= body
+ name_len
+ 1;
11232 dwarf2_macro_malformed_definition_complaint (body
);
11233 replacement
= body
+ name_len
;
11236 macro_define_object (file
, line
, name
, replacement
);
11240 else if (*p
== '(')
11242 /* It's a function-like macro. */
11243 char *name
= copy_string (body
, p
- body
);
11246 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
11250 p
= consume_improper_spaces (p
, body
);
11252 /* Parse the formal argument list. */
11253 while (*p
&& *p
!= ')')
11255 /* Find the extent of the current argument name. */
11256 const char *arg_start
= p
;
11258 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
11261 if (! *p
|| p
== arg_start
)
11262 dwarf2_macro_malformed_definition_complaint (body
);
11265 /* Make sure argv has room for the new argument. */
11266 if (argc
>= argv_size
)
11269 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
11272 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
11275 p
= consume_improper_spaces (p
, body
);
11277 /* Consume the comma, if present. */
11282 p
= consume_improper_spaces (p
, body
);
11291 /* Perfectly formed definition, no complaints. */
11292 macro_define_function (file
, line
, name
,
11293 argc
, (const char **) argv
,
11295 else if (*p
== '\0')
11297 /* Complain, but do define it. */
11298 dwarf2_macro_malformed_definition_complaint (body
);
11299 macro_define_function (file
, line
, name
,
11300 argc
, (const char **) argv
,
11304 /* Just complain. */
11305 dwarf2_macro_malformed_definition_complaint (body
);
11308 /* Just complain. */
11309 dwarf2_macro_malformed_definition_complaint (body
);
11315 for (i
= 0; i
< argc
; i
++)
11321 dwarf2_macro_malformed_definition_complaint (body
);
11326 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11327 char *comp_dir
, bfd
*abfd
,
11328 struct dwarf2_cu
*cu
)
11330 gdb_byte
*mac_ptr
, *mac_end
;
11331 struct macro_source_file
*current_file
= 0;
11332 enum dwarf_macinfo_record_type macinfo_type
;
11333 int at_commandline
;
11335 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11336 &dwarf2_per_objfile
->macinfo
);
11337 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11339 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11343 /* First pass: Find the name of the base filename.
11344 This filename is needed in order to process all macros whose definition
11345 (or undefinition) comes from the command line. These macros are defined
11346 before the first DW_MACINFO_start_file entry, and yet still need to be
11347 associated to the base file.
11349 To determine the base file name, we scan the macro definitions until we
11350 reach the first DW_MACINFO_start_file entry. We then initialize
11351 CURRENT_FILE accordingly so that any macro definition found before the
11352 first DW_MACINFO_start_file can still be associated to the base file. */
11354 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11355 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11356 + dwarf2_per_objfile
->macinfo
.size
;
11360 /* Do we at least have room for a macinfo type byte? */
11361 if (mac_ptr
>= mac_end
)
11363 /* Complaint is printed during the second pass as GDB will probably
11364 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11368 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11371 switch (macinfo_type
)
11373 /* A zero macinfo type indicates the end of the macro
11378 case DW_MACINFO_define
:
11379 case DW_MACINFO_undef
:
11380 /* Only skip the data by MAC_PTR. */
11382 unsigned int bytes_read
;
11384 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11385 mac_ptr
+= bytes_read
;
11386 read_string (abfd
, mac_ptr
, &bytes_read
);
11387 mac_ptr
+= bytes_read
;
11391 case DW_MACINFO_start_file
:
11393 unsigned int bytes_read
;
11396 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11397 mac_ptr
+= bytes_read
;
11398 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11399 mac_ptr
+= bytes_read
;
11401 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11406 case DW_MACINFO_end_file
:
11407 /* No data to skip by MAC_PTR. */
11410 case DW_MACINFO_vendor_ext
:
11411 /* Only skip the data by MAC_PTR. */
11413 unsigned int bytes_read
;
11415 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11416 mac_ptr
+= bytes_read
;
11417 read_string (abfd
, mac_ptr
, &bytes_read
);
11418 mac_ptr
+= bytes_read
;
11425 } while (macinfo_type
!= 0 && current_file
== NULL
);
11427 /* Second pass: Process all entries.
11429 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11430 command-line macro definitions/undefinitions. This flag is unset when we
11431 reach the first DW_MACINFO_start_file entry. */
11433 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11435 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11436 GDB is still reading the definitions from command line. First
11437 DW_MACINFO_start_file will need to be ignored as it was already executed
11438 to create CURRENT_FILE for the main source holding also the command line
11439 definitions. On first met DW_MACINFO_start_file this flag is reset to
11440 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11442 at_commandline
= 1;
11446 /* Do we at least have room for a macinfo type byte? */
11447 if (mac_ptr
>= mac_end
)
11449 dwarf2_macros_too_long_complaint ();
11453 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11456 switch (macinfo_type
)
11458 /* A zero macinfo type indicates the end of the macro
11463 case DW_MACINFO_define
:
11464 case DW_MACINFO_undef
:
11466 unsigned int bytes_read
;
11470 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11471 mac_ptr
+= bytes_read
;
11472 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11473 mac_ptr
+= bytes_read
;
11475 if (! current_file
)
11477 /* DWARF violation as no main source is present. */
11478 complaint (&symfile_complaints
,
11479 _("debug info with no main source gives macro %s "
11481 macinfo_type
== DW_MACINFO_define
?
11483 macinfo_type
== DW_MACINFO_undef
?
11484 _("undefinition") :
11485 _("something-or-other"), line
, body
);
11488 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11489 complaint (&symfile_complaints
,
11490 _("debug info gives %s macro %s with %s line %d: %s"),
11491 at_commandline
? _("command-line") : _("in-file"),
11492 macinfo_type
== DW_MACINFO_define
?
11494 macinfo_type
== DW_MACINFO_undef
?
11495 _("undefinition") :
11496 _("something-or-other"),
11497 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11499 if (macinfo_type
== DW_MACINFO_define
)
11500 parse_macro_definition (current_file
, line
, body
);
11501 else if (macinfo_type
== DW_MACINFO_undef
)
11502 macro_undef (current_file
, line
, body
);
11506 case DW_MACINFO_start_file
:
11508 unsigned int bytes_read
;
11511 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11512 mac_ptr
+= bytes_read
;
11513 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11514 mac_ptr
+= bytes_read
;
11516 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11517 complaint (&symfile_complaints
,
11518 _("debug info gives source %d included "
11519 "from %s at %s line %d"),
11520 file
, at_commandline
? _("command-line") : _("file"),
11521 line
== 0 ? _("zero") : _("non-zero"), line
);
11523 if (at_commandline
)
11525 /* This DW_MACINFO_start_file was executed in the pass one. */
11526 at_commandline
= 0;
11529 current_file
= macro_start_file (file
, line
,
11530 current_file
, comp_dir
,
11535 case DW_MACINFO_end_file
:
11536 if (! current_file
)
11537 complaint (&symfile_complaints
,
11538 _("macro debug info has an unmatched `close_file' directive"));
11541 current_file
= current_file
->included_by
;
11542 if (! current_file
)
11544 enum dwarf_macinfo_record_type next_type
;
11546 /* GCC circa March 2002 doesn't produce the zero
11547 type byte marking the end of the compilation
11548 unit. Complain if it's not there, but exit no
11551 /* Do we at least have room for a macinfo type byte? */
11552 if (mac_ptr
>= mac_end
)
11554 dwarf2_macros_too_long_complaint ();
11558 /* We don't increment mac_ptr here, so this is just
11560 next_type
= read_1_byte (abfd
, mac_ptr
);
11561 if (next_type
!= 0)
11562 complaint (&symfile_complaints
,
11563 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11570 case DW_MACINFO_vendor_ext
:
11572 unsigned int bytes_read
;
11576 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11577 mac_ptr
+= bytes_read
;
11578 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11579 mac_ptr
+= bytes_read
;
11581 /* We don't recognize any vendor extensions. */
11585 } while (macinfo_type
!= 0);
11588 /* Check if the attribute's form is a DW_FORM_block*
11589 if so return true else false. */
11591 attr_form_is_block (struct attribute
*attr
)
11593 return (attr
== NULL
? 0 :
11594 attr
->form
== DW_FORM_block1
11595 || attr
->form
== DW_FORM_block2
11596 || attr
->form
== DW_FORM_block4
11597 || attr
->form
== DW_FORM_block
11598 || attr
->form
== DW_FORM_exprloc
);
11601 /* Return non-zero if ATTR's value is a section offset --- classes
11602 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11603 You may use DW_UNSND (attr) to retrieve such offsets.
11605 Section 7.5.4, "Attribute Encodings", explains that no attribute
11606 may have a value that belongs to more than one of these classes; it
11607 would be ambiguous if we did, because we use the same forms for all
11610 attr_form_is_section_offset (struct attribute
*attr
)
11612 return (attr
->form
== DW_FORM_data4
11613 || attr
->form
== DW_FORM_data8
11614 || attr
->form
== DW_FORM_sec_offset
);
11618 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11619 zero otherwise. When this function returns true, you can apply
11620 dwarf2_get_attr_constant_value to it.
11622 However, note that for some attributes you must check
11623 attr_form_is_section_offset before using this test. DW_FORM_data4
11624 and DW_FORM_data8 are members of both the constant class, and of
11625 the classes that contain offsets into other debug sections
11626 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11627 that, if an attribute's can be either a constant or one of the
11628 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11629 taken as section offsets, not constants. */
11631 attr_form_is_constant (struct attribute
*attr
)
11633 switch (attr
->form
)
11635 case DW_FORM_sdata
:
11636 case DW_FORM_udata
:
11637 case DW_FORM_data1
:
11638 case DW_FORM_data2
:
11639 case DW_FORM_data4
:
11640 case DW_FORM_data8
:
11648 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11649 struct dwarf2_cu
*cu
)
11651 if (attr_form_is_section_offset (attr
)
11652 /* ".debug_loc" may not exist at all, or the offset may be outside
11653 the section. If so, fall through to the complaint in the
11655 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11657 struct dwarf2_loclist_baton
*baton
;
11659 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11660 sizeof (struct dwarf2_loclist_baton
));
11661 baton
->per_cu
= cu
->per_cu
;
11662 gdb_assert (baton
->per_cu
);
11664 dwarf2_read_section (dwarf2_per_objfile
->objfile
,
11665 &dwarf2_per_objfile
->loc
);
11667 /* We don't know how long the location list is, but make sure we
11668 don't run off the edge of the section. */
11669 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11670 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11671 baton
->base_address
= cu
->base_address
;
11672 if (cu
->base_known
== 0)
11673 complaint (&symfile_complaints
,
11674 _("Location list used without specifying the CU base address."));
11676 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11677 SYMBOL_LOCATION_BATON (sym
) = baton
;
11681 struct dwarf2_locexpr_baton
*baton
;
11683 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11684 sizeof (struct dwarf2_locexpr_baton
));
11685 baton
->per_cu
= cu
->per_cu
;
11686 gdb_assert (baton
->per_cu
);
11688 if (attr_form_is_block (attr
))
11690 /* Note that we're just copying the block's data pointer
11691 here, not the actual data. We're still pointing into the
11692 info_buffer for SYM's objfile; right now we never release
11693 that buffer, but when we do clean up properly this may
11695 baton
->size
= DW_BLOCK (attr
)->size
;
11696 baton
->data
= DW_BLOCK (attr
)->data
;
11700 dwarf2_invalid_attrib_class_complaint ("location description",
11701 SYMBOL_NATURAL_NAME (sym
));
11703 baton
->data
= NULL
;
11706 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11707 SYMBOL_LOCATION_BATON (sym
) = baton
;
11711 /* Return the OBJFILE associated with the compilation unit CU. */
11714 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11716 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11718 /* Return the master objfile, so that we can report and look up the
11719 correct file containing this variable. */
11720 if (objfile
->separate_debug_objfile_backlink
)
11721 objfile
= objfile
->separate_debug_objfile_backlink
;
11726 /* Return the address size given in the compilation unit header for CU. */
11729 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11732 return per_cu
->cu
->header
.addr_size
;
11735 /* If the CU is not currently read in, we re-read its header. */
11736 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11737 struct dwarf2_per_objfile
*per_objfile
11738 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11739 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11741 struct comp_unit_head cu_header
;
11742 memset (&cu_header
, 0, sizeof cu_header
);
11743 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11744 return cu_header
.addr_size
;
11748 /* Locate the .debug_info compilation unit from CU's objfile which contains
11749 the DIE at OFFSET. Raises an error on failure. */
11751 static struct dwarf2_per_cu_data
*
11752 dwarf2_find_containing_comp_unit (unsigned int offset
,
11753 struct objfile
*objfile
)
11755 struct dwarf2_per_cu_data
*this_cu
;
11759 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11762 int mid
= low
+ (high
- low
) / 2;
11763 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11768 gdb_assert (low
== high
);
11769 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11772 error (_("Dwarf Error: could not find partial DIE containing "
11773 "offset 0x%lx [in module %s]"),
11774 (long) offset
, bfd_get_filename (objfile
->obfd
));
11776 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11777 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11781 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11782 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11783 && offset
>= this_cu
->offset
+ this_cu
->length
)
11784 error (_("invalid dwarf2 offset %u"), offset
);
11785 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11790 /* Locate the compilation unit from OBJFILE which is located at exactly
11791 OFFSET. Raises an error on failure. */
11793 static struct dwarf2_per_cu_data
*
11794 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11796 struct dwarf2_per_cu_data
*this_cu
;
11797 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11798 if (this_cu
->offset
!= offset
)
11799 error (_("no compilation unit with offset %u."), offset
);
11803 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11805 static struct dwarf2_cu
*
11806 alloc_one_comp_unit (struct objfile
*objfile
)
11808 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11809 cu
->objfile
= objfile
;
11810 obstack_init (&cu
->comp_unit_obstack
);
11814 /* Release one cached compilation unit, CU. We unlink it from the tree
11815 of compilation units, but we don't remove it from the read_in_chain;
11816 the caller is responsible for that.
11817 NOTE: DATA is a void * because this function is also used as a
11818 cleanup routine. */
11821 free_one_comp_unit (void *data
)
11823 struct dwarf2_cu
*cu
= data
;
11825 if (cu
->per_cu
!= NULL
)
11826 cu
->per_cu
->cu
= NULL
;
11829 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11834 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11835 when we're finished with it. We can't free the pointer itself, but be
11836 sure to unlink it from the cache. Also release any associated storage
11837 and perform cache maintenance.
11839 Only used during partial symbol parsing. */
11842 free_stack_comp_unit (void *data
)
11844 struct dwarf2_cu
*cu
= data
;
11846 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11847 cu
->partial_dies
= NULL
;
11849 if (cu
->per_cu
!= NULL
)
11851 /* This compilation unit is on the stack in our caller, so we
11852 should not xfree it. Just unlink it. */
11853 cu
->per_cu
->cu
= NULL
;
11856 /* If we had a per-cu pointer, then we may have other compilation
11857 units loaded, so age them now. */
11858 age_cached_comp_units ();
11862 /* Free all cached compilation units. */
11865 free_cached_comp_units (void *data
)
11867 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11869 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11870 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11871 while (per_cu
!= NULL
)
11873 struct dwarf2_per_cu_data
*next_cu
;
11875 next_cu
= per_cu
->cu
->read_in_chain
;
11877 free_one_comp_unit (per_cu
->cu
);
11878 *last_chain
= next_cu
;
11884 /* Increase the age counter on each cached compilation unit, and free
11885 any that are too old. */
11888 age_cached_comp_units (void)
11890 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11892 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11893 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11894 while (per_cu
!= NULL
)
11896 per_cu
->cu
->last_used
++;
11897 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11898 dwarf2_mark (per_cu
->cu
);
11899 per_cu
= per_cu
->cu
->read_in_chain
;
11902 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11903 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11904 while (per_cu
!= NULL
)
11906 struct dwarf2_per_cu_data
*next_cu
;
11908 next_cu
= per_cu
->cu
->read_in_chain
;
11910 if (!per_cu
->cu
->mark
)
11912 free_one_comp_unit (per_cu
->cu
);
11913 *last_chain
= next_cu
;
11916 last_chain
= &per_cu
->cu
->read_in_chain
;
11922 /* Remove a single compilation unit from the cache. */
11925 free_one_cached_comp_unit (void *target_cu
)
11927 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11929 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11930 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11931 while (per_cu
!= NULL
)
11933 struct dwarf2_per_cu_data
*next_cu
;
11935 next_cu
= per_cu
->cu
->read_in_chain
;
11937 if (per_cu
->cu
== target_cu
)
11939 free_one_comp_unit (per_cu
->cu
);
11940 *last_chain
= next_cu
;
11944 last_chain
= &per_cu
->cu
->read_in_chain
;
11950 /* Release all extra memory associated with OBJFILE. */
11953 dwarf2_free_objfile (struct objfile
*objfile
)
11955 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11957 if (dwarf2_per_objfile
== NULL
)
11960 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11961 free_cached_comp_units (NULL
);
11963 /* Everything else should be on the objfile obstack. */
11966 /* A pair of DIE offset and GDB type pointer. We store these
11967 in a hash table separate from the DIEs, and preserve them
11968 when the DIEs are flushed out of cache. */
11970 struct dwarf2_offset_and_type
11972 unsigned int offset
;
11976 /* Hash function for a dwarf2_offset_and_type. */
11979 offset_and_type_hash (const void *item
)
11981 const struct dwarf2_offset_and_type
*ofs
= item
;
11982 return ofs
->offset
;
11985 /* Equality function for a dwarf2_offset_and_type. */
11988 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11990 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11991 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11992 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11995 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11996 table if necessary. For convenience, return TYPE. */
11998 static struct type
*
11999 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
12001 struct dwarf2_offset_and_type
**slot
, ofs
;
12003 /* For Ada types, make sure that the gnat-specific data is always
12004 initialized (if not already set). There are a few types where
12005 we should not be doing so, because the type-specific area is
12006 already used to hold some other piece of info (eg: TYPE_CODE_FLT
12007 where the type-specific area is used to store the floatformat).
12008 But this is not a problem, because the gnat-specific information
12009 is actually not needed for these types. */
12010 if (need_gnat_info (cu
)
12011 && TYPE_CODE (type
) != TYPE_CODE_FUNC
12012 && TYPE_CODE (type
) != TYPE_CODE_FLT
12013 && !HAVE_GNAT_AUX_INFO (type
))
12014 INIT_GNAT_SPECIFIC (type
);
12016 if (cu
->type_hash
== NULL
)
12018 gdb_assert (cu
->per_cu
!= NULL
);
12019 cu
->per_cu
->type_hash
12020 = htab_create_alloc_ex (cu
->header
.length
/ 24,
12021 offset_and_type_hash
,
12022 offset_and_type_eq
,
12024 &cu
->objfile
->objfile_obstack
,
12025 hashtab_obstack_allocate
,
12026 dummy_obstack_deallocate
);
12027 cu
->type_hash
= cu
->per_cu
->type_hash
;
12030 ofs
.offset
= die
->offset
;
12032 slot
= (struct dwarf2_offset_and_type
**)
12033 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
12034 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
12039 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
12040 not have a saved type. */
12042 static struct type
*
12043 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
12045 struct dwarf2_offset_and_type
*slot
, ofs
;
12046 htab_t type_hash
= cu
->type_hash
;
12048 if (type_hash
== NULL
)
12051 ofs
.offset
= die
->offset
;
12052 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
12059 /* Add a dependence relationship from CU to REF_PER_CU. */
12062 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
12063 struct dwarf2_per_cu_data
*ref_per_cu
)
12067 if (cu
->dependencies
== NULL
)
12069 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
12070 NULL
, &cu
->comp_unit_obstack
,
12071 hashtab_obstack_allocate
,
12072 dummy_obstack_deallocate
);
12074 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
12076 *slot
= ref_per_cu
;
12079 /* Subroutine of dwarf2_mark to pass to htab_traverse.
12080 Set the mark field in every compilation unit in the
12081 cache that we must keep because we are keeping CU. */
12084 dwarf2_mark_helper (void **slot
, void *data
)
12086 struct dwarf2_per_cu_data
*per_cu
;
12088 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
12089 if (per_cu
->cu
->mark
)
12091 per_cu
->cu
->mark
= 1;
12093 if (per_cu
->cu
->dependencies
!= NULL
)
12094 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12099 /* Set the mark field in CU and in every other compilation unit in the
12100 cache that we must keep because we are keeping CU. */
12103 dwarf2_mark (struct dwarf2_cu
*cu
)
12108 if (cu
->dependencies
!= NULL
)
12109 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
12113 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
12117 per_cu
->cu
->mark
= 0;
12118 per_cu
= per_cu
->cu
->read_in_chain
;
12122 /* Trivial hash function for partial_die_info: the hash value of a DIE
12123 is its offset in .debug_info for this objfile. */
12126 partial_die_hash (const void *item
)
12128 const struct partial_die_info
*part_die
= item
;
12129 return part_die
->offset
;
12132 /* Trivial comparison function for partial_die_info structures: two DIEs
12133 are equal if they have the same offset. */
12136 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
12138 const struct partial_die_info
*part_die_lhs
= item_lhs
;
12139 const struct partial_die_info
*part_die_rhs
= item_rhs
;
12140 return part_die_lhs
->offset
== part_die_rhs
->offset
;
12143 static struct cmd_list_element
*set_dwarf2_cmdlist
;
12144 static struct cmd_list_element
*show_dwarf2_cmdlist
;
12147 set_dwarf2_cmd (char *args
, int from_tty
)
12149 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
12153 show_dwarf2_cmd (char *args
, int from_tty
)
12155 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
12158 /* If section described by INFO was mmapped, munmap it now. */
12161 munmap_section_buffer (struct dwarf2_section_info
*info
)
12163 if (info
->was_mmapped
)
12166 intptr_t begin
= (intptr_t) info
->buffer
;
12167 intptr_t map_begin
= begin
& ~(pagesize
- 1);
12168 size_t map_length
= info
->size
+ begin
- map_begin
;
12169 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
12171 /* Without HAVE_MMAP, we should never be here to begin with. */
12177 /* munmap debug sections for OBJFILE, if necessary. */
12180 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
12182 struct dwarf2_per_objfile
*data
= d
;
12183 munmap_section_buffer (&data
->info
);
12184 munmap_section_buffer (&data
->abbrev
);
12185 munmap_section_buffer (&data
->line
);
12186 munmap_section_buffer (&data
->str
);
12187 munmap_section_buffer (&data
->macinfo
);
12188 munmap_section_buffer (&data
->ranges
);
12189 munmap_section_buffer (&data
->loc
);
12190 munmap_section_buffer (&data
->frame
);
12191 munmap_section_buffer (&data
->eh_frame
);
12194 void _initialize_dwarf2_read (void);
12197 _initialize_dwarf2_read (void)
12199 dwarf2_objfile_data_key
12200 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
12202 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
12203 Set DWARF 2 specific variables.\n\
12204 Configure DWARF 2 variables such as the cache size"),
12205 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
12206 0/*allow-unknown*/, &maintenance_set_cmdlist
);
12208 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
12209 Show DWARF 2 specific variables\n\
12210 Show DWARF 2 variables such as the cache size"),
12211 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
12212 0/*allow-unknown*/, &maintenance_show_cmdlist
);
12214 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
12215 &dwarf2_max_cache_age
, _("\
12216 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
12217 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
12218 A higher limit means that cached compilation units will be stored\n\
12219 in memory longer, and more total memory will be used. Zero disables\n\
12220 caching, which can slow down startup."),
12222 show_dwarf2_max_cache_age
,
12223 &set_dwarf2_cmdlist
,
12224 &show_dwarf2_cmdlist
);
12226 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
12227 Set debugging of the dwarf2 DIE reader."), _("\
12228 Show debugging of the dwarf2 DIE reader."), _("\
12229 When enabled (non-zero), DIEs are dumped after they are read in.\n\
12230 The value is the maximum depth to print."),
12233 &setdebuglist
, &showdebuglist
);