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
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"
53 #include "gdb_string.h"
54 #include "gdb_assert.h"
55 #include <sys/types.h>
64 /* .debug_info header for a compilation unit
65 Because of alignment constraints, this structure has padding and cannot
66 be mapped directly onto the beginning of the .debug_info section. */
67 typedef struct comp_unit_header
69 unsigned int length
; /* length of the .debug_info
71 unsigned short version
; /* version number -- 2 for DWARF
73 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
74 unsigned char addr_size
; /* byte size of an address -- 4 */
77 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
80 /* .debug_pubnames header
81 Because of alignment constraints, this structure has padding and cannot
82 be mapped directly onto the beginning of the .debug_info section. */
83 typedef struct pubnames_header
85 unsigned int length
; /* length of the .debug_pubnames
87 unsigned char version
; /* version number -- 2 for DWARF
89 unsigned int info_offset
; /* offset into .debug_info section */
90 unsigned int info_size
; /* byte size of .debug_info section
94 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
96 /* .debug_pubnames header
97 Because of alignment constraints, this structure has padding and cannot
98 be mapped directly onto the beginning of the .debug_info section. */
99 typedef struct aranges_header
101 unsigned int length
; /* byte len of the .debug_aranges
103 unsigned short version
; /* version number -- 2 for DWARF
105 unsigned int info_offset
; /* offset into .debug_info section */
106 unsigned char addr_size
; /* byte size of an address */
107 unsigned char seg_size
; /* byte size of segment descriptor */
110 #define _ACTUAL_ARANGES_HEADER_SIZE 12
112 /* .debug_line statement program prologue
113 Because of alignment constraints, this structure has padding and cannot
114 be mapped directly onto the beginning of the .debug_info section. */
115 typedef struct statement_prologue
117 unsigned int total_length
; /* byte length of the statement
119 unsigned short version
; /* version number -- 2 for DWARF
121 unsigned int prologue_length
; /* # bytes between prologue &
123 unsigned char minimum_instruction_length
; /* byte size of
125 unsigned char default_is_stmt
; /* initial value of is_stmt
128 unsigned char line_range
;
129 unsigned char opcode_base
; /* number assigned to first special
131 unsigned char *standard_opcode_lengths
;
135 /* When non-zero, dump DIEs after they are read in. */
136 static int dwarf2_die_debug
= 0;
140 /* When set, the file that we're processing is known to have debugging
141 info for C++ namespaces. GCC 3.3.x did not produce this information,
142 but later versions do. */
144 static int processing_has_namespace_info
;
146 static const struct objfile_data
*dwarf2_objfile_data_key
;
148 struct dwarf2_section_info
156 struct dwarf2_per_objfile
158 struct dwarf2_section_info info
;
159 struct dwarf2_section_info abbrev
;
160 struct dwarf2_section_info line
;
161 struct dwarf2_section_info pubnames
;
162 struct dwarf2_section_info aranges
;
163 struct dwarf2_section_info loc
;
164 struct dwarf2_section_info macinfo
;
165 struct dwarf2_section_info str
;
166 struct dwarf2_section_info ranges
;
167 struct dwarf2_section_info types
;
168 struct dwarf2_section_info frame
;
169 struct dwarf2_section_info eh_frame
;
171 /* A list of all the compilation units. This is used to locate
172 the target compilation unit of a particular reference. */
173 struct dwarf2_per_cu_data
**all_comp_units
;
175 /* The number of compilation units in ALL_COMP_UNITS. */
178 /* A chain of compilation units that are currently read in, so that
179 they can be freed later. */
180 struct dwarf2_per_cu_data
*read_in_chain
;
182 /* A table mapping .debug_types signatures to its signatured_type entry.
183 This is NULL if the .debug_types section hasn't been read in yet. */
184 htab_t signatured_types
;
186 /* A flag indicating wether this objfile has a section loaded at a
188 int has_section_at_zero
;
191 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
193 /* names of the debugging sections */
195 /* Note that if the debugging section has been compressed, it might
196 have a name like .zdebug_info. */
198 #define INFO_SECTION "debug_info"
199 #define ABBREV_SECTION "debug_abbrev"
200 #define LINE_SECTION "debug_line"
201 #define PUBNAMES_SECTION "debug_pubnames"
202 #define ARANGES_SECTION "debug_aranges"
203 #define LOC_SECTION "debug_loc"
204 #define MACINFO_SECTION "debug_macinfo"
205 #define STR_SECTION "debug_str"
206 #define RANGES_SECTION "debug_ranges"
207 #define TYPES_SECTION "debug_types"
208 #define FRAME_SECTION "debug_frame"
209 #define EH_FRAME_SECTION "eh_frame"
211 /* local data types */
213 /* We hold several abbreviation tables in memory at the same time. */
214 #ifndef ABBREV_HASH_SIZE
215 #define ABBREV_HASH_SIZE 121
218 /* The data in a compilation unit header, after target2host
219 translation, looks like this. */
220 struct comp_unit_head
224 unsigned char addr_size
;
225 unsigned char signed_addr_p
;
226 unsigned int abbrev_offset
;
228 /* Size of file offsets; either 4 or 8. */
229 unsigned int offset_size
;
231 /* Size of the length field; either 4 or 12. */
232 unsigned int initial_length_size
;
234 /* Offset to the first byte of this compilation unit header in the
235 .debug_info section, for resolving relative reference dies. */
238 /* Offset to first die in this cu from the start of the cu.
239 This will be the first byte following the compilation unit header. */
240 unsigned int first_die_offset
;
243 /* Internal state when decoding a particular compilation unit. */
246 /* The objfile containing this compilation unit. */
247 struct objfile
*objfile
;
249 /* The header of the compilation unit. */
250 struct comp_unit_head header
;
252 /* Base address of this compilation unit. */
253 CORE_ADDR base_address
;
255 /* Non-zero if base_address has been set. */
258 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
260 /* The language we are debugging. */
261 enum language language
;
262 const struct language_defn
*language_defn
;
264 const char *producer
;
266 /* The generic symbol table building routines have separate lists for
267 file scope symbols and all all other scopes (local scopes). So
268 we need to select the right one to pass to add_symbol_to_list().
269 We do it by keeping a pointer to the correct list in list_in_scope.
271 FIXME: The original dwarf code just treated the file scope as the
272 first local scope, and all other local scopes as nested local
273 scopes, and worked fine. Check to see if we really need to
274 distinguish these in buildsym.c. */
275 struct pending
**list_in_scope
;
277 /* DWARF abbreviation table associated with this compilation unit. */
278 struct abbrev_info
**dwarf2_abbrevs
;
280 /* Storage for the abbrev table. */
281 struct obstack abbrev_obstack
;
283 /* Hash table holding all the loaded partial DIEs. */
286 /* Storage for things with the same lifetime as this read-in compilation
287 unit, including partial DIEs. */
288 struct obstack comp_unit_obstack
;
290 /* When multiple dwarf2_cu structures are living in memory, this field
291 chains them all together, so that they can be released efficiently.
292 We will probably also want a generation counter so that most-recently-used
293 compilation units are cached... */
294 struct dwarf2_per_cu_data
*read_in_chain
;
296 /* Backchain to our per_cu entry if the tree has been built. */
297 struct dwarf2_per_cu_data
*per_cu
;
299 /* Pointer to the die -> type map. Although it is stored
300 permanently in per_cu, we copy it here to avoid double
304 /* How many compilation units ago was this CU last referenced? */
307 /* A hash table of die offsets for following references. */
310 /* Full DIEs if read in. */
311 struct die_info
*dies
;
313 /* A set of pointers to dwarf2_per_cu_data objects for compilation
314 units referenced by this one. Only set during full symbol processing;
315 partial symbol tables do not have dependencies. */
318 /* Header data from the line table, during full symbol processing. */
319 struct line_header
*line_header
;
321 /* Mark used when releasing cached dies. */
322 unsigned int mark
: 1;
324 /* This flag will be set if this compilation unit might include
325 inter-compilation-unit references. */
326 unsigned int has_form_ref_addr
: 1;
328 /* This flag will be set if this compilation unit includes any
329 DW_TAG_namespace DIEs. If we know that there are explicit
330 DIEs for namespaces, we don't need to try to infer them
331 from mangled names. */
332 unsigned int has_namespace_info
: 1;
335 /* Persistent data held for a compilation unit, even when not
336 processing it. We put a pointer to this structure in the
337 read_symtab_private field of the psymtab. If we encounter
338 inter-compilation-unit references, we also maintain a sorted
339 list of all compilation units. */
341 struct dwarf2_per_cu_data
343 /* The start offset and length of this compilation unit. 2**29-1
344 bytes should suffice to store the length of any compilation unit
345 - if it doesn't, GDB will fall over anyway.
346 NOTE: Unlike comp_unit_head.length, this length includes
347 initial_length_size. */
349 unsigned int length
: 29;
351 /* Flag indicating this compilation unit will be read in before
352 any of the current compilation units are processed. */
353 unsigned int queued
: 1;
355 /* This flag will be set if we need to load absolutely all DIEs
356 for this compilation unit, instead of just the ones we think
357 are interesting. It gets set if we look for a DIE in the
358 hash table and don't find it. */
359 unsigned int load_all_dies
: 1;
361 /* Non-zero if this CU is from .debug_types.
362 Otherwise it's from .debug_info. */
363 unsigned int from_debug_types
: 1;
365 /* Set iff currently read in. */
366 struct dwarf2_cu
*cu
;
368 /* If full symbols for this CU have been read in, then this field
369 holds a map of DIE offsets to types. It isn't always possible
370 to reconstruct this information later, so we have to preserve
374 /* The partial symbol table associated with this compilation unit,
375 or NULL for partial units (which do not have an associated
377 struct partial_symtab
*psymtab
;
380 /* Entry in the signatured_types hash table. */
382 struct signatured_type
386 /* Offset in .debug_types of the TU (type_unit) for this type. */
389 /* Offset in .debug_types of the type defined by this TU. */
390 unsigned int type_offset
;
392 /* The CU(/TU) of this type. */
393 struct dwarf2_per_cu_data per_cu
;
396 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
397 which are used for both .debug_info and .debug_types dies.
398 All parameters here are unchanging for the life of the call.
399 This struct exists to abstract away the constant parameters of
402 struct die_reader_specs
404 /* The bfd of this objfile. */
407 /* The CU of the DIE we are parsing. */
408 struct dwarf2_cu
*cu
;
410 /* Pointer to start of section buffer.
411 This is either the start of .debug_info or .debug_types. */
412 const gdb_byte
*buffer
;
415 /* The line number information for a compilation unit (found in the
416 .debug_line section) begins with a "statement program header",
417 which contains the following information. */
420 unsigned int total_length
;
421 unsigned short version
;
422 unsigned int header_length
;
423 unsigned char minimum_instruction_length
;
424 unsigned char default_is_stmt
;
426 unsigned char line_range
;
427 unsigned char opcode_base
;
429 /* standard_opcode_lengths[i] is the number of operands for the
430 standard opcode whose value is i. This means that
431 standard_opcode_lengths[0] is unused, and the last meaningful
432 element is standard_opcode_lengths[opcode_base - 1]. */
433 unsigned char *standard_opcode_lengths
;
435 /* The include_directories table. NOTE! These strings are not
436 allocated with xmalloc; instead, they are pointers into
437 debug_line_buffer. If you try to free them, `free' will get
439 unsigned int num_include_dirs
, include_dirs_size
;
442 /* The file_names table. NOTE! These strings are not allocated
443 with xmalloc; instead, they are pointers into debug_line_buffer.
444 Don't try to free them directly. */
445 unsigned int num_file_names
, file_names_size
;
449 unsigned int dir_index
;
450 unsigned int mod_time
;
452 int included_p
; /* Non-zero if referenced by the Line Number Program. */
453 struct symtab
*symtab
; /* The associated symbol table, if any. */
456 /* The start and end of the statement program following this
457 header. These point into dwarf2_per_objfile->line_buffer. */
458 gdb_byte
*statement_program_start
, *statement_program_end
;
461 /* When we construct a partial symbol table entry we only
462 need this much information. */
463 struct partial_die_info
465 /* Offset of this DIE. */
468 /* DWARF-2 tag for this DIE. */
469 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
471 /* Assorted flags describing the data found in this DIE. */
472 unsigned int has_children
: 1;
473 unsigned int is_external
: 1;
474 unsigned int is_declaration
: 1;
475 unsigned int has_type
: 1;
476 unsigned int has_specification
: 1;
477 unsigned int has_pc_info
: 1;
479 /* Flag set if the SCOPE field of this structure has been
481 unsigned int scope_set
: 1;
483 /* Flag set if the DIE has a byte_size attribute. */
484 unsigned int has_byte_size
: 1;
486 /* The name of this DIE. Normally the value of DW_AT_name, but
487 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
491 /* The scope to prepend to our children. This is generally
492 allocated on the comp_unit_obstack, so will disappear
493 when this compilation unit leaves the cache. */
496 /* The location description associated with this DIE, if any. */
497 struct dwarf_block
*locdesc
;
499 /* If HAS_PC_INFO, the PC range associated with this DIE. */
503 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
504 DW_AT_sibling, if any. */
507 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
508 DW_AT_specification (or DW_AT_abstract_origin or
510 unsigned int spec_offset
;
512 /* Pointers to this DIE's parent, first child, and next sibling,
514 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
517 /* This data structure holds the information of an abbrev. */
520 unsigned int number
; /* number identifying abbrev */
521 enum dwarf_tag tag
; /* dwarf tag */
522 unsigned short has_children
; /* boolean */
523 unsigned short num_attrs
; /* number of attributes */
524 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
525 struct abbrev_info
*next
; /* next in chain */
530 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
531 ENUM_BITFIELD(dwarf_form
) form
: 16;
534 /* Attributes have a name and a value */
537 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
538 ENUM_BITFIELD(dwarf_form
) form
: 15;
540 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
541 field should be in u.str (existing only for DW_STRING) but it is kept
542 here for better struct attribute alignment. */
543 unsigned int string_is_canonical
: 1;
548 struct dwarf_block
*blk
;
552 struct signatured_type
*signatured_type
;
557 /* This data structure holds a complete die structure. */
560 /* DWARF-2 tag for this DIE. */
561 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
563 /* Number of attributes */
564 unsigned short num_attrs
;
569 /* Offset in .debug_info or .debug_types section. */
572 /* The dies in a compilation unit form an n-ary tree. PARENT
573 points to this die's parent; CHILD points to the first child of
574 this node; and all the children of a given node are chained
575 together via their SIBLING fields, terminated by a die whose
577 struct die_info
*child
; /* Its first child, if any. */
578 struct die_info
*sibling
; /* Its next sibling, if any. */
579 struct die_info
*parent
; /* Its parent, if any. */
581 /* An array of attributes, with NUM_ATTRS elements. There may be
582 zero, but it's not common and zero-sized arrays are not
583 sufficiently portable C. */
584 struct attribute attrs
[1];
587 struct function_range
590 CORE_ADDR lowpc
, highpc
;
592 struct function_range
*next
;
595 /* Get at parts of an attribute structure */
597 #define DW_STRING(attr) ((attr)->u.str)
598 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
599 #define DW_UNSND(attr) ((attr)->u.unsnd)
600 #define DW_BLOCK(attr) ((attr)->u.blk)
601 #define DW_SND(attr) ((attr)->u.snd)
602 #define DW_ADDR(attr) ((attr)->u.addr)
603 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
605 /* Blocks are a bunch of untyped bytes. */
612 #ifndef ATTR_ALLOC_CHUNK
613 #define ATTR_ALLOC_CHUNK 4
616 /* Allocate fields for structs, unions and enums in this size. */
617 #ifndef DW_FIELD_ALLOC_CHUNK
618 #define DW_FIELD_ALLOC_CHUNK 4
621 /* A zeroed version of a partial die for initialization purposes. */
622 static struct partial_die_info zeroed_partial_die
;
624 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
625 but this would require a corresponding change in unpack_field_as_long
627 static int bits_per_byte
= 8;
629 /* The routines that read and process dies for a C struct or C++ class
630 pass lists of data member fields and lists of member function fields
631 in an instance of a field_info structure, as defined below. */
634 /* List of data member and baseclasses fields. */
637 struct nextfield
*next
;
644 /* Number of fields. */
647 /* Number of baseclasses. */
650 /* Set if the accesibility of one of the fields is not public. */
651 int non_public_fields
;
653 /* Member function fields array, entries are allocated in the order they
654 are encountered in the object file. */
657 struct nextfnfield
*next
;
658 struct fn_field fnfield
;
662 /* Member function fieldlist array, contains name of possibly overloaded
663 member function, number of overloaded member functions and a pointer
664 to the head of the member function field chain. */
669 struct nextfnfield
*head
;
673 /* Number of entries in the fnfieldlists array. */
677 /* One item on the queue of compilation units to read in full symbols
679 struct dwarf2_queue_item
681 struct dwarf2_per_cu_data
*per_cu
;
682 struct dwarf2_queue_item
*next
;
685 /* The current queue. */
686 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
688 /* Loaded secondary compilation units are kept in memory until they
689 have not been referenced for the processing of this many
690 compilation units. Set this to zero to disable caching. Cache
691 sizes of up to at least twenty will improve startup time for
692 typical inter-CU-reference binaries, at an obvious memory cost. */
693 static int dwarf2_max_cache_age
= 5;
695 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
696 struct cmd_list_element
*c
, const char *value
)
698 fprintf_filtered (file
, _("\
699 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
704 /* Various complaints about symbol reading that don't abort the process */
707 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
709 complaint (&symfile_complaints
,
710 _("statement list doesn't fit in .debug_line section"));
714 dwarf2_debug_line_missing_file_complaint (void)
716 complaint (&symfile_complaints
,
717 _(".debug_line section has line data without a file"));
721 dwarf2_debug_line_missing_end_sequence_complaint (void)
723 complaint (&symfile_complaints
,
724 _(".debug_line section has line program sequence without an end"));
728 dwarf2_complex_location_expr_complaint (void)
730 complaint (&symfile_complaints
, _("location expression too complex"));
734 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
737 complaint (&symfile_complaints
,
738 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
743 dwarf2_macros_too_long_complaint (void)
745 complaint (&symfile_complaints
,
746 _("macro info runs off end of `.debug_macinfo' section"));
750 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
752 complaint (&symfile_complaints
,
753 _("macro debug info contains a malformed macro definition:\n`%s'"),
758 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
760 complaint (&symfile_complaints
,
761 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
764 /* local function prototypes */
766 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
769 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
772 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
775 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
777 struct partial_symtab
*);
779 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
781 static void scan_partial_symbols (struct partial_die_info
*,
782 CORE_ADDR
*, CORE_ADDR
*,
783 int, struct dwarf2_cu
*);
785 static void add_partial_symbol (struct partial_die_info
*,
788 static int pdi_needs_namespace (enum dwarf_tag tag
);
790 static void add_partial_namespace (struct partial_die_info
*pdi
,
791 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
792 int need_pc
, struct dwarf2_cu
*cu
);
794 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
795 CORE_ADDR
*highpc
, int need_pc
,
796 struct dwarf2_cu
*cu
);
798 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
799 struct dwarf2_cu
*cu
);
801 static void add_partial_subprogram (struct partial_die_info
*pdi
,
802 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
803 int need_pc
, struct dwarf2_cu
*cu
);
805 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
806 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
807 bfd
*abfd
, struct dwarf2_cu
*cu
);
809 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
811 static void psymtab_to_symtab_1 (struct partial_symtab
*);
813 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
815 static void dwarf2_free_abbrev_table (void *);
817 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
820 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
823 static struct partial_die_info
*load_partial_dies (bfd
*,
824 gdb_byte
*, gdb_byte
*,
825 int, struct dwarf2_cu
*);
827 static gdb_byte
*read_partial_die (struct partial_die_info
*,
828 struct abbrev_info
*abbrev
,
830 gdb_byte
*, gdb_byte
*,
833 static struct partial_die_info
*find_partial_die (unsigned int,
836 static void fixup_partial_die (struct partial_die_info
*,
839 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
840 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
842 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
843 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
845 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
847 static int read_1_signed_byte (bfd
*, gdb_byte
*);
849 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
851 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
853 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
855 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
858 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
860 static LONGEST read_checked_initial_length_and_offset
861 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
862 unsigned int *, unsigned int *);
864 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
867 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
869 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
871 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
873 static char *read_indirect_string (bfd
*, gdb_byte
*,
874 const struct comp_unit_head
*,
877 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
879 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
881 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
883 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
885 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
888 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
892 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
893 struct dwarf2_cu
*cu
);
895 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
897 static struct die_info
*die_specification (struct die_info
*die
,
898 struct dwarf2_cu
**);
900 static void free_line_header (struct line_header
*lh
);
902 static void add_file_name (struct line_header
*, char *, unsigned int,
903 unsigned int, unsigned int);
905 static struct line_header
*(dwarf_decode_line_header
906 (unsigned int offset
,
907 bfd
*abfd
, struct dwarf2_cu
*cu
));
909 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
910 struct dwarf2_cu
*, struct partial_symtab
*);
912 static void dwarf2_start_subfile (char *, char *, char *);
914 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
917 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
920 static void dwarf2_const_value_data (struct attribute
*attr
,
924 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
926 static struct type
*die_containing_type (struct die_info
*,
929 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
931 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
933 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
935 static char *typename_concat (struct obstack
*,
940 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
942 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
944 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
946 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
948 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
949 struct dwarf2_cu
*, struct partial_symtab
*);
951 static int dwarf2_get_pc_bounds (struct die_info
*,
952 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
953 struct partial_symtab
*);
955 static void get_scope_pc_bounds (struct die_info
*,
956 CORE_ADDR
*, CORE_ADDR
*,
959 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
960 CORE_ADDR
, struct dwarf2_cu
*);
962 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
965 static void dwarf2_attach_fields_to_type (struct field_info
*,
966 struct type
*, struct dwarf2_cu
*);
968 static void dwarf2_add_member_fn (struct field_info
*,
969 struct die_info
*, struct type
*,
972 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
973 struct type
*, struct dwarf2_cu
*);
975 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
977 static const char *determine_class_name (struct die_info
*die
,
978 struct dwarf2_cu
*cu
);
980 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
982 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
984 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
986 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
988 static const char *namespace_name (struct die_info
*die
,
989 int *is_anonymous
, struct dwarf2_cu
*);
991 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
993 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
995 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
998 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1000 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1002 gdb_byte
**new_info_ptr
,
1003 struct die_info
*parent
);
1005 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1007 gdb_byte
**new_info_ptr
,
1008 struct die_info
*parent
);
1010 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1012 gdb_byte
**new_info_ptr
,
1013 struct die_info
*parent
);
1015 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1016 struct die_info
**, gdb_byte
*,
1019 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1021 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
1023 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1026 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1028 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1029 struct dwarf2_cu
**);
1031 static char *dwarf_tag_name (unsigned int);
1033 static char *dwarf_attr_name (unsigned int);
1035 static char *dwarf_form_name (unsigned int);
1037 static char *dwarf_stack_op_name (unsigned int);
1039 static char *dwarf_bool_name (unsigned int);
1041 static char *dwarf_type_encoding_name (unsigned int);
1044 static char *dwarf_cfi_name (unsigned int);
1047 static struct die_info
*sibling_die (struct die_info
*);
1049 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1051 static void dump_die_for_error (struct die_info
*);
1053 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1056 /*static*/ void dump_die (struct die_info
*, int max_level
);
1058 static void store_in_ref_table (struct die_info
*,
1059 struct dwarf2_cu
*);
1061 static int is_ref_attr (struct attribute
*);
1063 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1065 static int dwarf2_get_attr_constant_value (struct attribute
*, int);
1067 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1069 struct dwarf2_cu
**);
1071 static struct die_info
*follow_die_ref (struct die_info
*,
1073 struct dwarf2_cu
**);
1075 static struct die_info
*follow_die_sig (struct die_info
*,
1077 struct dwarf2_cu
**);
1079 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1080 unsigned int offset
);
1082 static void read_signatured_type (struct objfile
*,
1083 struct signatured_type
*type_sig
);
1085 /* memory allocation interface */
1087 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1089 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1091 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1093 static void initialize_cu_func_list (struct dwarf2_cu
*);
1095 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1096 struct dwarf2_cu
*);
1098 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1099 char *, bfd
*, struct dwarf2_cu
*);
1101 static int attr_form_is_block (struct attribute
*);
1103 static int attr_form_is_section_offset (struct attribute
*);
1105 static int attr_form_is_constant (struct attribute
*);
1107 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1109 struct dwarf2_cu
*cu
);
1111 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1112 struct abbrev_info
*abbrev
,
1113 struct dwarf2_cu
*cu
);
1115 static void free_stack_comp_unit (void *);
1117 static hashval_t
partial_die_hash (const void *item
);
1119 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1121 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1122 (unsigned int offset
, struct objfile
*objfile
);
1124 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1125 (unsigned int offset
, struct objfile
*objfile
);
1127 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1129 static void free_one_comp_unit (void *);
1131 static void free_cached_comp_units (void *);
1133 static void age_cached_comp_units (void);
1135 static void free_one_cached_comp_unit (void *);
1137 static struct type
*set_die_type (struct die_info
*, struct type
*,
1138 struct dwarf2_cu
*);
1140 static void create_all_comp_units (struct objfile
*);
1142 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1145 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1147 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1148 struct dwarf2_per_cu_data
*);
1150 static void dwarf2_mark (struct dwarf2_cu
*);
1152 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1154 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1156 /* Try to locate the sections we need for DWARF 2 debugging
1157 information and return true if we have enough to do something. */
1160 dwarf2_has_info (struct objfile
*objfile
)
1162 struct dwarf2_per_objfile
*data
;
1164 /* Initialize per-objfile state. */
1165 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1166 memset (data
, 0, sizeof (*data
));
1167 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1168 dwarf2_per_objfile
= data
;
1170 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1171 return (data
->info
.asection
!= NULL
&& data
->abbrev
.asection
!= NULL
);
1174 /* When loading sections, we can either look for ".<name>", or for
1175 * ".z<name>", which indicates a compressed section. */
1178 section_is_p (const char *section_name
, const char *name
)
1180 return (section_name
[0] == '.'
1181 && (strcmp (section_name
+ 1, name
) == 0
1182 || (section_name
[1] == 'z'
1183 && strcmp (section_name
+ 2, name
) == 0)));
1186 /* This function is mapped across the sections and remembers the
1187 offset and size of each of the debugging sections we are interested
1191 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1193 if (section_is_p (sectp
->name
, INFO_SECTION
))
1195 dwarf2_per_objfile
->info
.asection
= sectp
;
1196 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1198 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1200 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1201 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1203 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1205 dwarf2_per_objfile
->line
.asection
= sectp
;
1206 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1208 else if (section_is_p (sectp
->name
, PUBNAMES_SECTION
))
1210 dwarf2_per_objfile
->pubnames
.asection
= sectp
;
1211 dwarf2_per_objfile
->pubnames
.size
= bfd_get_section_size (sectp
);
1213 else if (section_is_p (sectp
->name
, ARANGES_SECTION
))
1215 dwarf2_per_objfile
->aranges
.asection
= sectp
;
1216 dwarf2_per_objfile
->aranges
.size
= bfd_get_section_size (sectp
);
1218 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1220 dwarf2_per_objfile
->loc
.asection
= sectp
;
1221 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1223 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1225 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1226 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1228 else if (section_is_p (sectp
->name
, STR_SECTION
))
1230 dwarf2_per_objfile
->str
.asection
= sectp
;
1231 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1233 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1235 dwarf2_per_objfile
->frame
.asection
= sectp
;
1236 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1238 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1240 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1241 if (aflag
& SEC_HAS_CONTENTS
)
1243 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1244 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1247 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1249 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1250 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1252 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1254 dwarf2_per_objfile
->types
.asection
= sectp
;
1255 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1258 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1259 && bfd_section_vma (abfd
, sectp
) == 0)
1260 dwarf2_per_objfile
->has_section_at_zero
= 1;
1263 /* Decompress a section that was compressed using zlib. Store the
1264 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1267 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1268 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1270 bfd
*abfd
= objfile
->obfd
;
1272 error (_("Support for zlib-compressed DWARF data (from '%s') "
1273 "is disabled in this copy of GDB"),
1274 bfd_get_filename (abfd
));
1276 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1277 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1278 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1279 bfd_size_type uncompressed_size
;
1280 gdb_byte
*uncompressed_buffer
;
1283 int header_size
= 12;
1285 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1286 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1287 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1288 bfd_get_filename (abfd
));
1290 /* Read the zlib header. In this case, it should be "ZLIB" followed
1291 by the uncompressed section size, 8 bytes in big-endian order. */
1292 if (compressed_size
< header_size
1293 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1294 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1295 bfd_get_filename (abfd
));
1296 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1297 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1298 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1299 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1300 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1301 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1302 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1303 uncompressed_size
+= compressed_buffer
[11];
1305 /* It is possible the section consists of several compressed
1306 buffers concatenated together, so we uncompress in a loop. */
1310 strm
.avail_in
= compressed_size
- header_size
;
1311 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1312 strm
.avail_out
= uncompressed_size
;
1313 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1315 rc
= inflateInit (&strm
);
1316 while (strm
.avail_in
> 0)
1319 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1320 bfd_get_filename (abfd
), rc
);
1321 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1322 + (uncompressed_size
- strm
.avail_out
));
1323 rc
= inflate (&strm
, Z_FINISH
);
1324 if (rc
!= Z_STREAM_END
)
1325 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1326 bfd_get_filename (abfd
), rc
);
1327 rc
= inflateReset (&strm
);
1329 rc
= inflateEnd (&strm
);
1331 || strm
.avail_out
!= 0)
1332 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1333 bfd_get_filename (abfd
), rc
);
1335 do_cleanups (cleanup
);
1336 *outbuf
= uncompressed_buffer
;
1337 *outsize
= uncompressed_size
;
1341 /* Read the contents of the section SECTP from object file specified by
1342 OBJFILE, store info about the section into INFO.
1343 If the section is compressed, uncompress it before returning. */
1346 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1348 bfd
*abfd
= objfile
->obfd
;
1349 asection
*sectp
= info
->asection
;
1350 gdb_byte
*buf
, *retbuf
;
1351 unsigned char header
[4];
1353 info
->buffer
= NULL
;
1354 info
->was_mmapped
= 0;
1356 if (info
->asection
== NULL
|| info
->size
== 0)
1359 /* Check if the file has a 4-byte header indicating compression. */
1360 if (info
->size
> sizeof (header
)
1361 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1362 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1364 /* Upon decompression, update the buffer and its size. */
1365 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1367 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1375 pagesize
= getpagesize ();
1377 /* Only try to mmap sections which are large enough: we don't want to
1378 waste space due to fragmentation. Also, only try mmap for sections
1379 without relocations. */
1381 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1383 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1384 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1385 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1386 MAP_PRIVATE
, pg_offset
);
1388 if (retbuf
!= MAP_FAILED
)
1390 info
->was_mmapped
= 1;
1391 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1397 /* If we get here, we are a normal, not-compressed section. */
1399 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1401 /* When debugging .o files, we may need to apply relocations; see
1402 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1403 We never compress sections in .o files, so we only need to
1404 try this when the section is not compressed. */
1405 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
1408 info
->buffer
= retbuf
;
1412 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1413 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1414 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1415 bfd_get_filename (abfd
));
1418 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1422 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1423 asection
**sectp
, gdb_byte
**bufp
,
1424 bfd_size_type
*sizep
)
1426 struct dwarf2_per_objfile
*data
1427 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1428 struct dwarf2_section_info
*info
;
1429 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1430 info
= &data
->eh_frame
;
1431 else if (section_is_p (section_name
, FRAME_SECTION
))
1432 info
= &data
->frame
;
1436 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1437 /* We haven't read this section in yet. Do it now. */
1438 dwarf2_read_section (objfile
, info
);
1440 *sectp
= info
->asection
;
1441 *bufp
= info
->buffer
;
1442 *sizep
= info
->size
;
1445 /* Build a partial symbol table. */
1448 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1450 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
1451 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->abbrev
);
1452 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->line
);
1453 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->str
);
1454 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->macinfo
);
1455 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
1456 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
1457 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->loc
);
1458 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->eh_frame
);
1459 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->frame
);
1462 || (objfile
->global_psymbols
.size
== 0
1463 && objfile
->static_psymbols
.size
== 0))
1465 init_psymbol_list (objfile
, 1024);
1469 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1471 /* Things are significantly easier if we have .debug_aranges and
1472 .debug_pubnames sections */
1474 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1478 /* only test this case for now */
1480 /* In this case we have to work a bit harder */
1481 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1486 /* Build the partial symbol table from the information in the
1487 .debug_pubnames and .debug_aranges sections. */
1490 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1492 bfd
*abfd
= objfile
->obfd
;
1493 char *aranges_buffer
, *pubnames_buffer
;
1494 char *aranges_ptr
, *pubnames_ptr
;
1495 unsigned int entry_length
, version
, info_offset
, info_size
;
1497 pubnames_buffer
= dwarf2_read_section (objfile
,
1498 dwarf_pubnames_section
);
1499 pubnames_ptr
= pubnames_buffer
;
1500 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames
.size
)
1502 unsigned int bytes_read
;
1504 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &bytes_read
);
1505 pubnames_ptr
+= bytes_read
;
1506 version
= read_1_byte (abfd
, pubnames_ptr
);
1508 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1510 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1514 aranges_buffer
= dwarf2_read_section (objfile
,
1515 dwarf_aranges_section
);
1520 /* Return TRUE if OFFSET is within CU_HEADER. */
1523 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1525 unsigned int bottom
= cu_header
->offset
;
1526 unsigned int top
= (cu_header
->offset
1528 + cu_header
->initial_length_size
);
1529 return (offset
>= bottom
&& offset
< top
);
1532 /* Read in the comp unit header information from the debug_info at info_ptr.
1533 NOTE: This leaves members offset, first_die_offset to be filled in
1537 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1538 gdb_byte
*info_ptr
, bfd
*abfd
)
1541 unsigned int bytes_read
;
1543 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1544 cu_header
->initial_length_size
= bytes_read
;
1545 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1546 info_ptr
+= bytes_read
;
1547 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1549 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1551 info_ptr
+= bytes_read
;
1552 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1554 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1555 if (signed_addr
< 0)
1556 internal_error (__FILE__
, __LINE__
,
1557 _("read_comp_unit_head: dwarf from non elf file"));
1558 cu_header
->signed_addr_p
= signed_addr
;
1564 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1565 gdb_byte
*buffer
, unsigned int buffer_size
,
1568 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1570 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1572 if (header
->version
!= 2 && header
->version
!= 3)
1573 error (_("Dwarf Error: wrong version in compilation unit header "
1574 "(is %d, should be %d) [in module %s]"), header
->version
,
1575 2, bfd_get_filename (abfd
));
1577 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1578 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1579 "(offset 0x%lx + 6) [in module %s]"),
1580 (long) header
->abbrev_offset
,
1581 (long) (beg_of_comp_unit
- buffer
),
1582 bfd_get_filename (abfd
));
1584 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1585 > buffer
+ buffer_size
)
1586 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1587 "(offset 0x%lx + 0) [in module %s]"),
1588 (long) header
->length
,
1589 (long) (beg_of_comp_unit
- buffer
),
1590 bfd_get_filename (abfd
));
1595 /* Read in the types comp unit header information from .debug_types entry at
1596 types_ptr. The result is a pointer to one past the end of the header. */
1599 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
1600 ULONGEST
*signature
,
1601 gdb_byte
*types_ptr
, bfd
*abfd
)
1603 unsigned int bytes_read
;
1604 gdb_byte
*initial_types_ptr
= types_ptr
;
1606 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
1608 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
1610 *signature
= read_8_bytes (abfd
, types_ptr
);
1612 types_ptr
+= cu_header
->offset_size
;
1613 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
1618 /* Allocate a new partial symtab for file named NAME and mark this new
1619 partial symtab as being an include of PST. */
1622 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1623 struct objfile
*objfile
)
1625 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1627 subpst
->section_offsets
= pst
->section_offsets
;
1628 subpst
->textlow
= 0;
1629 subpst
->texthigh
= 0;
1631 subpst
->dependencies
= (struct partial_symtab
**)
1632 obstack_alloc (&objfile
->objfile_obstack
,
1633 sizeof (struct partial_symtab
*));
1634 subpst
->dependencies
[0] = pst
;
1635 subpst
->number_of_dependencies
= 1;
1637 subpst
->globals_offset
= 0;
1638 subpst
->n_global_syms
= 0;
1639 subpst
->statics_offset
= 0;
1640 subpst
->n_static_syms
= 0;
1641 subpst
->symtab
= NULL
;
1642 subpst
->read_symtab
= pst
->read_symtab
;
1645 /* No private part is necessary for include psymtabs. This property
1646 can be used to differentiate between such include psymtabs and
1647 the regular ones. */
1648 subpst
->read_symtab_private
= NULL
;
1651 /* Read the Line Number Program data and extract the list of files
1652 included by the source file represented by PST. Build an include
1653 partial symtab for each of these included files. */
1656 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1657 struct die_info
*die
,
1658 struct partial_symtab
*pst
)
1660 struct objfile
*objfile
= cu
->objfile
;
1661 bfd
*abfd
= objfile
->obfd
;
1662 struct line_header
*lh
= NULL
;
1663 struct attribute
*attr
;
1665 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
1668 unsigned int line_offset
= DW_UNSND (attr
);
1669 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
1672 return; /* No linetable, so no includes. */
1674 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1676 free_line_header (lh
);
1680 hash_type_signature (const void *item
)
1682 const struct signatured_type
*type_sig
= item
;
1683 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1684 return type_sig
->signature
;
1688 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
1690 const struct signatured_type
*lhs
= item_lhs
;
1691 const struct signatured_type
*rhs
= item_rhs
;
1692 return lhs
->signature
== rhs
->signature
;
1695 /* Create the hash table of all entries in the .debug_types section.
1696 The result is zero if there is an error (e.g. missing .debug_types section),
1697 otherwise non-zero. */
1700 create_debug_types_hash_table (struct objfile
*objfile
)
1702 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
;
1705 if (info_ptr
== NULL
)
1707 dwarf2_per_objfile
->signatured_types
= NULL
;
1711 types_htab
= htab_create_alloc_ex (41,
1712 hash_type_signature
,
1715 &objfile
->objfile_obstack
,
1716 hashtab_obstack_allocate
,
1717 dummy_obstack_deallocate
);
1719 if (dwarf2_die_debug
)
1720 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
1722 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1724 unsigned int offset
;
1725 unsigned int offset_size
;
1726 unsigned int type_offset
;
1727 unsigned int length
, initial_length_size
;
1728 unsigned short version
;
1730 struct signatured_type
*type_sig
;
1732 gdb_byte
*ptr
= info_ptr
;
1734 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
1736 /* We need to read the type's signature in order to build the hash
1737 table, but we don't need to read anything else just yet. */
1739 /* Sanity check to ensure entire cu is present. */
1740 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
1741 if (ptr
+ length
+ initial_length_size
1742 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1744 complaint (&symfile_complaints
,
1745 _("debug type entry runs off end of `.debug_types' section, ignored"));
1749 offset_size
= initial_length_size
== 4 ? 4 : 8;
1750 ptr
+= initial_length_size
;
1751 version
= bfd_get_16 (objfile
->obfd
, ptr
);
1753 ptr
+= offset_size
; /* abbrev offset */
1754 ptr
+= 1; /* address size */
1755 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
1757 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
1759 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
1760 memset (type_sig
, 0, sizeof (*type_sig
));
1761 type_sig
->signature
= signature
;
1762 type_sig
->offset
= offset
;
1763 type_sig
->type_offset
= type_offset
;
1765 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
1766 gdb_assert (slot
!= NULL
);
1769 if (dwarf2_die_debug
)
1770 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
1771 offset
, phex (signature
, sizeof (signature
)));
1773 info_ptr
= info_ptr
+ initial_length_size
+ length
;
1776 dwarf2_per_objfile
->signatured_types
= types_htab
;
1781 /* Lookup a signature based type.
1782 Returns NULL if SIG is not present in the table. */
1784 static struct signatured_type
*
1785 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
1787 struct signatured_type find_entry
, *entry
;
1789 if (dwarf2_per_objfile
->signatured_types
== NULL
)
1791 complaint (&symfile_complaints
,
1792 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1796 find_entry
.signature
= sig
;
1797 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
1801 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1804 init_cu_die_reader (struct die_reader_specs
*reader
,
1805 struct dwarf2_cu
*cu
)
1807 reader
->abfd
= cu
->objfile
->obfd
;
1809 if (cu
->per_cu
->from_debug_types
)
1810 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
1812 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
1815 /* Find the base address of the compilation unit for range lists and
1816 location lists. It will normally be specified by DW_AT_low_pc.
1817 In DWARF-3 draft 4, the base address could be overridden by
1818 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1819 compilation units with discontinuous ranges. */
1822 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
1824 struct attribute
*attr
;
1827 cu
->base_address
= 0;
1829 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
1832 cu
->base_address
= DW_ADDR (attr
);
1837 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
1840 cu
->base_address
= DW_ADDR (attr
);
1846 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1847 to combine the common parts.
1848 Process a compilation unit for a psymtab.
1849 BUFFER is a pointer to the beginning of the dwarf section buffer,
1850 either .debug_info or debug_types.
1851 INFO_PTR is a pointer to the start of the CU.
1852 Returns a pointer to the next CU. */
1855 process_psymtab_comp_unit (struct objfile
*objfile
,
1856 struct dwarf2_per_cu_data
*this_cu
,
1857 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1858 unsigned int buffer_size
)
1860 bfd
*abfd
= objfile
->obfd
;
1861 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1862 struct die_info
*comp_unit_die
;
1863 struct partial_symtab
*pst
;
1865 struct cleanup
*back_to_inner
;
1866 struct dwarf2_cu cu
;
1867 unsigned int bytes_read
;
1868 int has_children
, has_pc_info
;
1869 struct attribute
*attr
;
1871 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
1872 struct die_reader_specs reader_specs
;
1874 memset (&cu
, 0, sizeof (cu
));
1875 cu
.objfile
= objfile
;
1876 obstack_init (&cu
.comp_unit_obstack
);
1878 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1880 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
1881 buffer
, buffer_size
,
1884 /* Complete the cu_header. */
1885 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
1886 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1888 cu
.list_in_scope
= &file_symbols
;
1890 cu
.per_cu
= this_cu
;
1892 /* Read the abbrevs for this compilation unit into a table. */
1893 dwarf2_read_abbrevs (abfd
, &cu
);
1894 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1896 /* Read the compilation unit die. */
1897 if (this_cu
->from_debug_types
)
1898 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1899 init_cu_die_reader (&reader_specs
, &cu
);
1900 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1903 if (this_cu
->from_debug_types
)
1905 /* offset,length haven't been set yet for type units. */
1906 this_cu
->offset
= cu
.header
.offset
;
1907 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1909 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1911 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1912 + cu
.header
.initial_length_size
);
1913 do_cleanups (back_to_inner
);
1917 /* Set the language we're debugging. */
1918 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1920 set_cu_language (DW_UNSND (attr
), &cu
);
1922 set_cu_language (language_minimal
, &cu
);
1924 /* Allocate a new partial symbol table structure. */
1925 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1926 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1927 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1928 /* TEXTLOW and TEXTHIGH are set below. */
1930 objfile
->global_psymbols
.next
,
1931 objfile
->static_psymbols
.next
);
1933 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1935 pst
->dirname
= DW_STRING (attr
);
1937 pst
->read_symtab_private
= (char *) this_cu
;
1939 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1941 /* Store the function that reads in the rest of the symbol table */
1942 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1944 /* If this compilation unit was already read in, free the
1945 cached copy in order to read it in again. This is
1946 necessary because we skipped some symbols when we first
1947 read in the compilation unit (see load_partial_dies).
1948 This problem could be avoided, but the benefit is
1950 if (this_cu
->cu
!= NULL
)
1951 free_one_cached_comp_unit (this_cu
->cu
);
1953 /* Note that this is a pointer to our stack frame, being
1954 added to a global data structure. It will be cleaned up
1955 in free_stack_comp_unit when we finish with this
1956 compilation unit. */
1959 this_cu
->psymtab
= pst
;
1961 dwarf2_find_base_address (comp_unit_die
, &cu
);
1963 /* Possibly set the default values of LOWPC and HIGHPC from
1965 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1966 &best_highpc
, &cu
, pst
);
1967 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1968 /* Store the contiguous range if it is not empty; it can be empty for
1969 CUs with no code. */
1970 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1971 best_lowpc
+ baseaddr
,
1972 best_highpc
+ baseaddr
- 1, pst
);
1974 /* Check if comp unit has_children.
1975 If so, read the rest of the partial symbols from this comp unit.
1976 If not, there's no more debug_info for this comp unit. */
1979 struct partial_die_info
*first_die
;
1980 CORE_ADDR lowpc
, highpc
;
1982 lowpc
= ((CORE_ADDR
) -1);
1983 highpc
= ((CORE_ADDR
) 0);
1985 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1987 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1988 ! has_pc_info
, &cu
);
1990 /* If we didn't find a lowpc, set it to highpc to avoid
1991 complaints from `maint check'. */
1992 if (lowpc
== ((CORE_ADDR
) -1))
1995 /* If the compilation unit didn't have an explicit address range,
1996 then use the information extracted from its child dies. */
2000 best_highpc
= highpc
;
2003 pst
->textlow
= best_lowpc
+ baseaddr
;
2004 pst
->texthigh
= best_highpc
+ baseaddr
;
2006 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
2007 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2008 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
2009 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2010 sort_pst_symbols (pst
);
2012 /* If there is already a psymtab or symtab for a file of this
2013 name, remove it. (If there is a symtab, more drastic things
2014 also happen.) This happens in VxWorks. */
2015 if (! this_cu
->from_debug_types
)
2016 free_named_symtabs (pst
->filename
);
2018 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
2019 + cu
.header
.initial_length_size
);
2021 if (this_cu
->from_debug_types
)
2023 /* It's not clear we want to do anything with stmt lists here.
2024 Waiting to see what gcc ultimately does. */
2028 /* Get the list of files included in the current compilation unit,
2029 and build a psymtab for each of them. */
2030 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
2033 do_cleanups (back_to_inner
);
2038 /* Traversal function for htab_traverse_noresize.
2039 Process one .debug_types comp-unit. */
2042 process_type_comp_unit (void **slot
, void *info
)
2044 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
2045 struct objfile
*objfile
= (struct objfile
*) info
;
2046 struct dwarf2_per_cu_data
*this_cu
;
2048 this_cu
= &entry
->per_cu
;
2049 this_cu
->from_debug_types
= 1;
2051 process_psymtab_comp_unit (objfile
, this_cu
,
2052 dwarf2_per_objfile
->types
.buffer
,
2053 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
2054 dwarf2_per_objfile
->types
.size
);
2059 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
2060 Build partial symbol tables for the .debug_types comp-units. */
2063 build_type_psymtabs (struct objfile
*objfile
)
2065 if (! create_debug_types_hash_table (objfile
))
2068 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
2069 process_type_comp_unit
, objfile
);
2072 /* Build the partial symbol table by doing a quick pass through the
2073 .debug_info and .debug_abbrev sections. */
2076 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
2078 /* Instead of reading this into a big buffer, we should probably use
2079 mmap() on architectures that support it. (FIXME) */
2080 bfd
*abfd
= objfile
->obfd
;
2082 struct cleanup
*back_to
;
2084 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2086 /* Any cached compilation units will be linked by the per-objfile
2087 read_in_chain. Make sure to free them when we're done. */
2088 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2090 build_type_psymtabs (objfile
);
2092 create_all_comp_units (objfile
);
2094 objfile
->psymtabs_addrmap
=
2095 addrmap_create_mutable (&objfile
->objfile_obstack
);
2097 /* Since the objects we're extracting from .debug_info vary in
2098 length, only the individual functions to extract them (like
2099 read_comp_unit_head and load_partial_die) can really know whether
2100 the buffer is large enough to hold another complete object.
2102 At the moment, they don't actually check that. If .debug_info
2103 holds just one extra byte after the last compilation unit's dies,
2104 then read_comp_unit_head will happily read off the end of the
2105 buffer. read_partial_die is similarly casual. Those functions
2108 For this loop condition, simply checking whether there's any data
2109 left at all should be sufficient. */
2111 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2112 + dwarf2_per_objfile
->info
.size
))
2114 struct dwarf2_per_cu_data
*this_cu
;
2116 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2119 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2120 dwarf2_per_objfile
->info
.buffer
,
2122 dwarf2_per_objfile
->info
.size
);
2125 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2126 &objfile
->objfile_obstack
);
2128 do_cleanups (back_to
);
2131 /* Load the partial DIEs for a secondary CU into memory. */
2134 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2135 struct objfile
*objfile
)
2137 bfd
*abfd
= objfile
->obfd
;
2138 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2139 struct die_info
*comp_unit_die
;
2140 struct dwarf2_cu
*cu
;
2141 unsigned int bytes_read
;
2142 struct cleanup
*back_to
;
2143 struct attribute
*attr
;
2145 struct die_reader_specs reader_specs
;
2147 gdb_assert (! this_cu
->from_debug_types
);
2149 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2150 beg_of_comp_unit
= info_ptr
;
2152 cu
= alloc_one_comp_unit (objfile
);
2154 /* ??? Missing cleanup for CU? */
2156 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2157 dwarf2_per_objfile
->info
.buffer
,
2158 dwarf2_per_objfile
->info
.size
,
2161 /* Complete the cu_header. */
2162 cu
->header
.offset
= this_cu
->offset
;
2163 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2165 /* Read the abbrevs for this compilation unit into a table. */
2166 dwarf2_read_abbrevs (abfd
, cu
);
2167 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2169 /* Read the compilation unit die. */
2170 init_cu_die_reader (&reader_specs
, cu
);
2171 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2174 /* Set the language we're debugging. */
2175 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2177 set_cu_language (DW_UNSND (attr
), cu
);
2179 set_cu_language (language_minimal
, cu
);
2181 /* Link this compilation unit into the compilation unit tree. */
2183 cu
->per_cu
= this_cu
;
2184 cu
->type_hash
= this_cu
->type_hash
;
2186 /* Check if comp unit has_children.
2187 If so, read the rest of the partial symbols from this comp unit.
2188 If not, there's no more debug_info for this comp unit. */
2190 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2192 do_cleanups (back_to
);
2195 /* Create a list of all compilation units in OBJFILE. We do this only
2196 if an inter-comp-unit reference is found; presumably if there is one,
2197 there will be many, and one will occur early in the .debug_info section.
2198 So there's no point in building this list incrementally. */
2201 create_all_comp_units (struct objfile
*objfile
)
2205 struct dwarf2_per_cu_data
**all_comp_units
;
2206 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2210 all_comp_units
= xmalloc (n_allocated
2211 * sizeof (struct dwarf2_per_cu_data
*));
2213 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2215 unsigned int length
, initial_length_size
;
2216 gdb_byte
*beg_of_comp_unit
;
2217 struct dwarf2_per_cu_data
*this_cu
;
2218 unsigned int offset
;
2220 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2222 /* Read just enough information to find out where the next
2223 compilation unit is. */
2224 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2225 &initial_length_size
);
2227 /* Save the compilation unit for later lookup. */
2228 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2229 sizeof (struct dwarf2_per_cu_data
));
2230 memset (this_cu
, 0, sizeof (*this_cu
));
2231 this_cu
->offset
= offset
;
2232 this_cu
->length
= length
+ initial_length_size
;
2234 if (n_comp_units
== n_allocated
)
2237 all_comp_units
= xrealloc (all_comp_units
,
2239 * sizeof (struct dwarf2_per_cu_data
*));
2241 all_comp_units
[n_comp_units
++] = this_cu
;
2243 info_ptr
= info_ptr
+ this_cu
->length
;
2246 dwarf2_per_objfile
->all_comp_units
2247 = obstack_alloc (&objfile
->objfile_obstack
,
2248 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2249 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2250 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2251 xfree (all_comp_units
);
2252 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2255 /* Process all loaded DIEs for compilation unit CU, starting at
2256 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2257 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2258 DW_AT_ranges). If NEED_PC is set, then this function will set
2259 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2260 and record the covered ranges in the addrmap. */
2263 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2264 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2266 struct objfile
*objfile
= cu
->objfile
;
2267 bfd
*abfd
= objfile
->obfd
;
2268 struct partial_die_info
*pdi
;
2270 /* Now, march along the PDI's, descending into ones which have
2271 interesting children but skipping the children of the other ones,
2272 until we reach the end of the compilation unit. */
2278 fixup_partial_die (pdi
, cu
);
2280 /* Anonymous namespaces have no name but have interesting
2281 children, so we need to look at them. Ditto for anonymous
2284 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2285 || pdi
->tag
== DW_TAG_enumeration_type
)
2289 case DW_TAG_subprogram
:
2290 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2292 case DW_TAG_variable
:
2293 case DW_TAG_typedef
:
2294 case DW_TAG_union_type
:
2295 if (!pdi
->is_declaration
)
2297 add_partial_symbol (pdi
, cu
);
2300 case DW_TAG_class_type
:
2301 case DW_TAG_interface_type
:
2302 case DW_TAG_structure_type
:
2303 if (!pdi
->is_declaration
)
2305 add_partial_symbol (pdi
, cu
);
2308 case DW_TAG_enumeration_type
:
2309 if (!pdi
->is_declaration
)
2310 add_partial_enumeration (pdi
, cu
);
2312 case DW_TAG_base_type
:
2313 case DW_TAG_subrange_type
:
2314 /* File scope base type definitions are added to the partial
2316 add_partial_symbol (pdi
, cu
);
2318 case DW_TAG_namespace
:
2319 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2322 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2329 /* If the die has a sibling, skip to the sibling. */
2331 pdi
= pdi
->die_sibling
;
2335 /* Functions used to compute the fully scoped name of a partial DIE.
2337 Normally, this is simple. For C++, the parent DIE's fully scoped
2338 name is concatenated with "::" and the partial DIE's name. For
2339 Java, the same thing occurs except that "." is used instead of "::".
2340 Enumerators are an exception; they use the scope of their parent
2341 enumeration type, i.e. the name of the enumeration type is not
2342 prepended to the enumerator.
2344 There are two complexities. One is DW_AT_specification; in this
2345 case "parent" means the parent of the target of the specification,
2346 instead of the direct parent of the DIE. The other is compilers
2347 which do not emit DW_TAG_namespace; in this case we try to guess
2348 the fully qualified name of structure types from their members'
2349 linkage names. This must be done using the DIE's children rather
2350 than the children of any DW_AT_specification target. We only need
2351 to do this for structures at the top level, i.e. if the target of
2352 any DW_AT_specification (if any; otherwise the DIE itself) does not
2355 /* Compute the scope prefix associated with PDI's parent, in
2356 compilation unit CU. The result will be allocated on CU's
2357 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2358 field. NULL is returned if no prefix is necessary. */
2360 partial_die_parent_scope (struct partial_die_info
*pdi
,
2361 struct dwarf2_cu
*cu
)
2363 char *grandparent_scope
;
2364 struct partial_die_info
*parent
, *real_pdi
;
2366 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2367 then this means the parent of the specification DIE. */
2370 while (real_pdi
->has_specification
)
2371 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2373 parent
= real_pdi
->die_parent
;
2377 if (parent
->scope_set
)
2378 return parent
->scope
;
2380 fixup_partial_die (parent
, cu
);
2382 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2384 if (parent
->tag
== DW_TAG_namespace
2385 || parent
->tag
== DW_TAG_structure_type
2386 || parent
->tag
== DW_TAG_class_type
2387 || parent
->tag
== DW_TAG_interface_type
2388 || parent
->tag
== DW_TAG_union_type
)
2390 if (grandparent_scope
== NULL
)
2391 parent
->scope
= parent
->name
;
2393 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2396 else if (parent
->tag
== DW_TAG_enumeration_type
)
2397 /* Enumerators should not get the name of the enumeration as a prefix. */
2398 parent
->scope
= grandparent_scope
;
2401 /* FIXME drow/2004-04-01: What should we be doing with
2402 function-local names? For partial symbols, we should probably be
2404 complaint (&symfile_complaints
,
2405 _("unhandled containing DIE tag %d for DIE at %d"),
2406 parent
->tag
, pdi
->offset
);
2407 parent
->scope
= grandparent_scope
;
2410 parent
->scope_set
= 1;
2411 return parent
->scope
;
2414 /* Return the fully scoped name associated with PDI, from compilation unit
2415 CU. The result will be allocated with malloc. */
2417 partial_die_full_name (struct partial_die_info
*pdi
,
2418 struct dwarf2_cu
*cu
)
2422 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2423 if (parent_scope
== NULL
)
2426 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
2430 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2432 struct objfile
*objfile
= cu
->objfile
;
2434 char *actual_name
= NULL
;
2435 const char *my_prefix
;
2436 const struct partial_symbol
*psym
= NULL
;
2438 int built_actual_name
= 0;
2440 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2442 if (pdi_needs_namespace (pdi
->tag
))
2444 actual_name
= partial_die_full_name (pdi
, cu
);
2446 built_actual_name
= 1;
2449 if (actual_name
== NULL
)
2450 actual_name
= pdi
->name
;
2454 case DW_TAG_subprogram
:
2455 if (pdi
->is_external
|| cu
->language
== language_ada
)
2457 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2458 of the global scope. But in Ada, we want to be able to access
2459 nested procedures globally. So all Ada subprograms are stored
2460 in the global scope. */
2461 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2462 mst_text, objfile); */
2463 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2464 VAR_DOMAIN
, LOC_BLOCK
,
2465 &objfile
->global_psymbols
,
2466 0, pdi
->lowpc
+ baseaddr
,
2467 cu
->language
, objfile
);
2471 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2472 mst_file_text, objfile); */
2473 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2474 VAR_DOMAIN
, LOC_BLOCK
,
2475 &objfile
->static_psymbols
,
2476 0, pdi
->lowpc
+ baseaddr
,
2477 cu
->language
, objfile
);
2480 case DW_TAG_variable
:
2481 if (pdi
->is_external
)
2484 Don't enter into the minimal symbol tables as there is
2485 a minimal symbol table entry from the ELF symbols already.
2486 Enter into partial symbol table if it has a location
2487 descriptor or a type.
2488 If the location descriptor is missing, new_symbol will create
2489 a LOC_UNRESOLVED symbol, the address of the variable will then
2490 be determined from the minimal symbol table whenever the variable
2492 The address for the partial symbol table entry is not
2493 used by GDB, but it comes in handy for debugging partial symbol
2497 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2498 if (pdi
->locdesc
|| pdi
->has_type
)
2499 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2500 VAR_DOMAIN
, LOC_STATIC
,
2501 &objfile
->global_psymbols
,
2503 cu
->language
, objfile
);
2507 /* Static Variable. Skip symbols without location descriptors. */
2508 if (pdi
->locdesc
== NULL
)
2510 if (built_actual_name
)
2511 xfree (actual_name
);
2514 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2515 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2516 mst_file_data, objfile); */
2517 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2518 VAR_DOMAIN
, LOC_STATIC
,
2519 &objfile
->static_psymbols
,
2521 cu
->language
, objfile
);
2524 case DW_TAG_typedef
:
2525 case DW_TAG_base_type
:
2526 case DW_TAG_subrange_type
:
2527 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2528 VAR_DOMAIN
, LOC_TYPEDEF
,
2529 &objfile
->static_psymbols
,
2530 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2532 case DW_TAG_namespace
:
2533 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2534 VAR_DOMAIN
, LOC_TYPEDEF
,
2535 &objfile
->global_psymbols
,
2536 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2538 case DW_TAG_class_type
:
2539 case DW_TAG_interface_type
:
2540 case DW_TAG_structure_type
:
2541 case DW_TAG_union_type
:
2542 case DW_TAG_enumeration_type
:
2543 /* Skip external references. The DWARF standard says in the section
2544 about "Structure, Union, and Class Type Entries": "An incomplete
2545 structure, union or class type is represented by a structure,
2546 union or class entry that does not have a byte size attribute
2547 and that has a DW_AT_declaration attribute." */
2548 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2550 if (built_actual_name
)
2551 xfree (actual_name
);
2555 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2556 static vs. global. */
2557 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2558 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2559 (cu
->language
== language_cplus
2560 || cu
->language
== language_java
)
2561 ? &objfile
->global_psymbols
2562 : &objfile
->static_psymbols
,
2563 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2566 case DW_TAG_enumerator
:
2567 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2568 VAR_DOMAIN
, LOC_CONST
,
2569 (cu
->language
== language_cplus
2570 || cu
->language
== language_java
)
2571 ? &objfile
->global_psymbols
2572 : &objfile
->static_psymbols
,
2573 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2579 /* Check to see if we should scan the name for possible namespace
2580 info. Only do this if this is C++, if we don't have namespace
2581 debugging info in the file, if the psym is of an appropriate type
2582 (otherwise we'll have psym == NULL), and if we actually had a
2583 mangled name to begin with. */
2585 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2586 cases which do not set PSYM above? */
2588 if (cu
->language
== language_cplus
2589 && cu
->has_namespace_info
== 0
2591 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2592 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2595 if (built_actual_name
)
2596 xfree (actual_name
);
2599 /* Determine whether a die of type TAG living in a C++ class or
2600 namespace needs to have the name of the scope prepended to the
2601 name listed in the die. */
2604 pdi_needs_namespace (enum dwarf_tag tag
)
2608 case DW_TAG_namespace
:
2609 case DW_TAG_typedef
:
2610 case DW_TAG_class_type
:
2611 case DW_TAG_interface_type
:
2612 case DW_TAG_structure_type
:
2613 case DW_TAG_union_type
:
2614 case DW_TAG_enumeration_type
:
2615 case DW_TAG_enumerator
:
2622 /* Read a partial die corresponding to a namespace; also, add a symbol
2623 corresponding to that namespace to the symbol table. NAMESPACE is
2624 the name of the enclosing namespace. */
2627 add_partial_namespace (struct partial_die_info
*pdi
,
2628 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2629 int need_pc
, struct dwarf2_cu
*cu
)
2631 struct objfile
*objfile
= cu
->objfile
;
2633 /* Add a symbol for the namespace. */
2635 add_partial_symbol (pdi
, cu
);
2637 /* Now scan partial symbols in that namespace. */
2639 if (pdi
->has_children
)
2640 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2643 /* Read a partial die corresponding to a Fortran module. */
2646 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2647 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2649 /* Now scan partial symbols in that module.
2651 FIXME: Support the separate Fortran module namespaces. */
2653 if (pdi
->has_children
)
2654 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2657 /* Read a partial die corresponding to a subprogram and create a partial
2658 symbol for that subprogram. When the CU language allows it, this
2659 routine also defines a partial symbol for each nested subprogram
2660 that this subprogram contains.
2662 DIE my also be a lexical block, in which case we simply search
2663 recursively for suprograms defined inside that lexical block.
2664 Again, this is only performed when the CU language allows this
2665 type of definitions. */
2668 add_partial_subprogram (struct partial_die_info
*pdi
,
2669 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2670 int need_pc
, struct dwarf2_cu
*cu
)
2672 if (pdi
->tag
== DW_TAG_subprogram
)
2674 if (pdi
->has_pc_info
)
2676 if (pdi
->lowpc
< *lowpc
)
2677 *lowpc
= pdi
->lowpc
;
2678 if (pdi
->highpc
> *highpc
)
2679 *highpc
= pdi
->highpc
;
2683 struct objfile
*objfile
= cu
->objfile
;
2685 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2686 SECT_OFF_TEXT (objfile
));
2687 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2688 pdi
->lowpc
, pdi
->highpc
- 1,
2689 cu
->per_cu
->psymtab
);
2691 if (!pdi
->is_declaration
)
2692 add_partial_symbol (pdi
, cu
);
2696 if (! pdi
->has_children
)
2699 if (cu
->language
== language_ada
)
2701 pdi
= pdi
->die_child
;
2704 fixup_partial_die (pdi
, cu
);
2705 if (pdi
->tag
== DW_TAG_subprogram
2706 || pdi
->tag
== DW_TAG_lexical_block
)
2707 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2708 pdi
= pdi
->die_sibling
;
2713 /* See if we can figure out if the class lives in a namespace. We do
2714 this by looking for a member function; its demangled name will
2715 contain namespace info, if there is any. */
2718 guess_structure_name (struct partial_die_info
*struct_pdi
,
2719 struct dwarf2_cu
*cu
)
2721 if ((cu
->language
== language_cplus
2722 || cu
->language
== language_java
)
2723 && cu
->has_namespace_info
== 0
2724 && struct_pdi
->has_children
)
2726 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2727 what template types look like, because the demangler
2728 frequently doesn't give the same name as the debug info. We
2729 could fix this by only using the demangled name to get the
2730 prefix (but see comment in read_structure_type). */
2732 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2733 struct partial_die_info
*real_pdi
;
2735 /* If this DIE (this DIE's specification, if any) has a parent, then
2736 we should not do this. We'll prepend the parent's fully qualified
2737 name when we create the partial symbol. */
2739 real_pdi
= struct_pdi
;
2740 while (real_pdi
->has_specification
)
2741 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2743 if (real_pdi
->die_parent
!= NULL
)
2746 while (child_pdi
!= NULL
)
2748 if (child_pdi
->tag
== DW_TAG_subprogram
)
2750 char *actual_class_name
2751 = language_class_name_from_physname (cu
->language_defn
,
2753 if (actual_class_name
!= NULL
)
2756 = obsavestring (actual_class_name
,
2757 strlen (actual_class_name
),
2758 &cu
->comp_unit_obstack
);
2759 xfree (actual_class_name
);
2764 child_pdi
= child_pdi
->die_sibling
;
2769 /* Read a partial die corresponding to an enumeration type. */
2772 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2773 struct dwarf2_cu
*cu
)
2775 struct objfile
*objfile
= cu
->objfile
;
2776 bfd
*abfd
= objfile
->obfd
;
2777 struct partial_die_info
*pdi
;
2779 if (enum_pdi
->name
!= NULL
)
2780 add_partial_symbol (enum_pdi
, cu
);
2782 pdi
= enum_pdi
->die_child
;
2785 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2786 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2788 add_partial_symbol (pdi
, cu
);
2789 pdi
= pdi
->die_sibling
;
2793 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2794 Return the corresponding abbrev, or NULL if the number is zero (indicating
2795 an empty DIE). In either case *BYTES_READ will be set to the length of
2796 the initial number. */
2798 static struct abbrev_info
*
2799 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2800 struct dwarf2_cu
*cu
)
2802 bfd
*abfd
= cu
->objfile
->obfd
;
2803 unsigned int abbrev_number
;
2804 struct abbrev_info
*abbrev
;
2806 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2808 if (abbrev_number
== 0)
2811 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2814 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2815 bfd_get_filename (abfd
));
2821 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2822 Returns a pointer to the end of a series of DIEs, terminated by an empty
2823 DIE. Any children of the skipped DIEs will also be skipped. */
2826 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2828 struct abbrev_info
*abbrev
;
2829 unsigned int bytes_read
;
2833 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2835 return info_ptr
+ bytes_read
;
2837 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2841 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2842 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2843 abbrev corresponding to that skipped uleb128 should be passed in
2844 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2848 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2849 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2851 unsigned int bytes_read
;
2852 struct attribute attr
;
2853 bfd
*abfd
= cu
->objfile
->obfd
;
2854 unsigned int form
, i
;
2856 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2858 /* The only abbrev we care about is DW_AT_sibling. */
2859 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2861 read_attribute (&attr
, &abbrev
->attrs
[i
],
2862 abfd
, info_ptr
, cu
);
2863 if (attr
.form
== DW_FORM_ref_addr
)
2864 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2866 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2869 /* If it isn't DW_AT_sibling, skip this attribute. */
2870 form
= abbrev
->attrs
[i
].form
;
2875 case DW_FORM_ref_addr
:
2876 info_ptr
+= cu
->header
.addr_size
;
2896 case DW_FORM_string
:
2897 read_string (abfd
, info_ptr
, &bytes_read
);
2898 info_ptr
+= bytes_read
;
2901 info_ptr
+= cu
->header
.offset_size
;
2904 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2905 info_ptr
+= bytes_read
;
2907 case DW_FORM_block1
:
2908 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2910 case DW_FORM_block2
:
2911 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2913 case DW_FORM_block4
:
2914 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2918 case DW_FORM_ref_udata
:
2919 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2921 case DW_FORM_indirect
:
2922 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2923 info_ptr
+= bytes_read
;
2924 /* We need to continue parsing from here, so just go back to
2926 goto skip_attribute
;
2929 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2930 dwarf_form_name (form
),
2931 bfd_get_filename (abfd
));
2935 if (abbrev
->has_children
)
2936 return skip_children (buffer
, info_ptr
, cu
);
2941 /* Locate ORIG_PDI's sibling.
2942 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2946 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2947 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2948 bfd
*abfd
, struct dwarf2_cu
*cu
)
2950 /* Do we know the sibling already? */
2952 if (orig_pdi
->sibling
)
2953 return orig_pdi
->sibling
;
2955 /* Are there any children to deal with? */
2957 if (!orig_pdi
->has_children
)
2960 /* Skip the children the long way. */
2962 return skip_children (buffer
, info_ptr
, cu
);
2965 /* Expand this partial symbol table into a full symbol table. */
2968 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2970 /* FIXME: This is barely more than a stub. */
2975 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2981 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2982 gdb_flush (gdb_stdout
);
2985 /* Restore our global data. */
2986 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2987 dwarf2_objfile_data_key
);
2989 /* If this psymtab is constructed from a debug-only objfile, the
2990 has_section_at_zero flag will not necessarily be correct. We
2991 can get the correct value for this flag by looking at the data
2992 associated with the (presumably stripped) associated objfile. */
2993 if (pst
->objfile
->separate_debug_objfile_backlink
)
2995 struct dwarf2_per_objfile
*dpo_backlink
2996 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
2997 dwarf2_objfile_data_key
);
2998 dwarf2_per_objfile
->has_section_at_zero
2999 = dpo_backlink
->has_section_at_zero
;
3002 psymtab_to_symtab_1 (pst
);
3004 /* Finish up the debug error message. */
3006 printf_filtered (_("done.\n"));
3011 /* Add PER_CU to the queue. */
3014 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3016 struct dwarf2_queue_item
*item
;
3019 item
= xmalloc (sizeof (*item
));
3020 item
->per_cu
= per_cu
;
3023 if (dwarf2_queue
== NULL
)
3024 dwarf2_queue
= item
;
3026 dwarf2_queue_tail
->next
= item
;
3028 dwarf2_queue_tail
= item
;
3031 /* Process the queue. */
3034 process_queue (struct objfile
*objfile
)
3036 struct dwarf2_queue_item
*item
, *next_item
;
3038 /* The queue starts out with one item, but following a DIE reference
3039 may load a new CU, adding it to the end of the queue. */
3040 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
3042 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
3043 process_full_comp_unit (item
->per_cu
);
3045 item
->per_cu
->queued
= 0;
3046 next_item
= item
->next
;
3050 dwarf2_queue_tail
= NULL
;
3053 /* Free all allocated queue entries. This function only releases anything if
3054 an error was thrown; if the queue was processed then it would have been
3055 freed as we went along. */
3058 dwarf2_release_queue (void *dummy
)
3060 struct dwarf2_queue_item
*item
, *last
;
3062 item
= dwarf2_queue
;
3065 /* Anything still marked queued is likely to be in an
3066 inconsistent state, so discard it. */
3067 if (item
->per_cu
->queued
)
3069 if (item
->per_cu
->cu
!= NULL
)
3070 free_one_cached_comp_unit (item
->per_cu
->cu
);
3071 item
->per_cu
->queued
= 0;
3079 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
3082 /* Read in full symbols for PST, and anything it depends on. */
3085 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
3087 struct dwarf2_per_cu_data
*per_cu
;
3088 struct cleanup
*back_to
;
3091 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
3092 if (!pst
->dependencies
[i
]->readin
)
3094 /* Inform about additional files that need to be read in. */
3097 /* FIXME: i18n: Need to make this a single string. */
3098 fputs_filtered (" ", gdb_stdout
);
3100 fputs_filtered ("and ", gdb_stdout
);
3102 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
3103 wrap_here (""); /* Flush output */
3104 gdb_flush (gdb_stdout
);
3106 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3109 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
3113 /* It's an include file, no symbols to read for it.
3114 Everything is in the parent symtab. */
3119 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3121 queue_comp_unit (per_cu
, pst
->objfile
);
3123 if (per_cu
->from_debug_types
)
3124 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3126 load_full_comp_unit (per_cu
, pst
->objfile
);
3128 process_queue (pst
->objfile
);
3130 /* Age the cache, releasing compilation units that have not
3131 been used recently. */
3132 age_cached_comp_units ();
3134 do_cleanups (back_to
);
3137 /* Load the DIEs associated with PER_CU into memory. */
3140 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3142 bfd
*abfd
= objfile
->obfd
;
3143 struct dwarf2_cu
*cu
;
3144 unsigned int offset
;
3145 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3146 struct cleanup
*back_to
, *free_cu_cleanup
;
3147 struct attribute
*attr
;
3150 gdb_assert (! per_cu
->from_debug_types
);
3152 /* Set local variables from the partial symbol table info. */
3153 offset
= per_cu
->offset
;
3155 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3156 beg_of_comp_unit
= info_ptr
;
3158 cu
= alloc_one_comp_unit (objfile
);
3160 /* If an error occurs while loading, release our storage. */
3161 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3163 /* Read in the comp_unit header. */
3164 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3166 /* Complete the cu_header. */
3167 cu
->header
.offset
= offset
;
3168 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3170 /* Read the abbrevs for this compilation unit. */
3171 dwarf2_read_abbrevs (abfd
, cu
);
3172 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3174 /* Link this compilation unit into the compilation unit tree. */
3176 cu
->per_cu
= per_cu
;
3177 cu
->type_hash
= per_cu
->type_hash
;
3179 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3181 /* We try not to read any attributes in this function, because not
3182 all objfiles needed for references have been loaded yet, and symbol
3183 table processing isn't initialized. But we have to set the CU language,
3184 or we won't be able to build types correctly. */
3185 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3187 set_cu_language (DW_UNSND (attr
), cu
);
3189 set_cu_language (language_minimal
, cu
);
3191 /* Link this CU into read_in_chain. */
3192 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3193 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3195 do_cleanups (back_to
);
3197 /* We've successfully allocated this compilation unit. Let our caller
3198 clean it up when finished with it. */
3199 discard_cleanups (free_cu_cleanup
);
3202 /* Generate full symbol information for PST and CU, whose DIEs have
3203 already been loaded into memory. */
3206 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3208 struct partial_symtab
*pst
= per_cu
->psymtab
;
3209 struct dwarf2_cu
*cu
= per_cu
->cu
;
3210 struct objfile
*objfile
= pst
->objfile
;
3211 bfd
*abfd
= objfile
->obfd
;
3212 CORE_ADDR lowpc
, highpc
;
3213 struct symtab
*symtab
;
3214 struct cleanup
*back_to
;
3217 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3220 back_to
= make_cleanup (really_free_pendings
, NULL
);
3222 cu
->list_in_scope
= &file_symbols
;
3224 dwarf2_find_base_address (cu
->dies
, cu
);
3226 /* Do line number decoding in read_file_scope () */
3227 process_die (cu
->dies
, cu
);
3229 /* Some compilers don't define a DW_AT_high_pc attribute for the
3230 compilation unit. If the DW_AT_high_pc is missing, synthesize
3231 it, by scanning the DIE's below the compilation unit. */
3232 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3234 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3236 /* Set symtab language to language from DW_AT_language.
3237 If the compilation is from a C file generated by language preprocessors,
3238 do not set the language if it was already deduced by start_subfile. */
3240 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3242 symtab
->language
= cu
->language
;
3244 pst
->symtab
= symtab
;
3247 do_cleanups (back_to
);
3250 /* Process a die and its children. */
3253 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3257 case DW_TAG_padding
:
3259 case DW_TAG_compile_unit
:
3260 read_file_scope (die
, cu
);
3262 case DW_TAG_type_unit
:
3263 read_type_unit_scope (die
, cu
);
3265 case DW_TAG_subprogram
:
3266 case DW_TAG_inlined_subroutine
:
3267 read_func_scope (die
, cu
);
3269 case DW_TAG_lexical_block
:
3270 case DW_TAG_try_block
:
3271 case DW_TAG_catch_block
:
3272 read_lexical_block_scope (die
, cu
);
3274 case DW_TAG_class_type
:
3275 case DW_TAG_interface_type
:
3276 case DW_TAG_structure_type
:
3277 case DW_TAG_union_type
:
3278 process_structure_scope (die
, cu
);
3280 case DW_TAG_enumeration_type
:
3281 process_enumeration_scope (die
, cu
);
3284 /* These dies have a type, but processing them does not create
3285 a symbol or recurse to process the children. Therefore we can
3286 read them on-demand through read_type_die. */
3287 case DW_TAG_subroutine_type
:
3288 case DW_TAG_set_type
:
3289 case DW_TAG_array_type
:
3290 case DW_TAG_pointer_type
:
3291 case DW_TAG_ptr_to_member_type
:
3292 case DW_TAG_reference_type
:
3293 case DW_TAG_string_type
:
3296 case DW_TAG_base_type
:
3297 case DW_TAG_subrange_type
:
3298 case DW_TAG_typedef
:
3299 /* Add a typedef symbol for the type definition, if it has a
3301 new_symbol (die
, read_type_die (die
, cu
), cu
);
3303 case DW_TAG_common_block
:
3304 read_common_block (die
, cu
);
3306 case DW_TAG_common_inclusion
:
3308 case DW_TAG_namespace
:
3309 processing_has_namespace_info
= 1;
3310 read_namespace (die
, cu
);
3313 read_module (die
, cu
);
3315 case DW_TAG_imported_declaration
:
3316 case DW_TAG_imported_module
:
3317 processing_has_namespace_info
= 1;
3318 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3319 || cu
->language
!= language_fortran
))
3320 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3321 dwarf_tag_name (die
->tag
));
3322 read_import_statement (die
, cu
);
3325 new_symbol (die
, NULL
, cu
);
3330 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3331 If scope qualifiers are appropriate they will be added. The result
3332 will be allocated on the objfile_obstack, or NULL if the DIE does
3336 dwarf2_full_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
3338 struct attribute
*attr
;
3339 char *prefix
, *name
;
3340 struct ui_file
*buf
= NULL
;
3342 name
= dwarf2_name (die
, cu
);
3346 /* These are the only languages we know how to qualify names in. */
3347 if (cu
->language
!= language_cplus
3348 && cu
->language
!= language_java
)
3351 /* If no prefix is necessary for this type of DIE, return the
3352 unqualified name. The other three tags listed could be handled
3353 in pdi_needs_namespace, but that requires broader changes. */
3354 if (!pdi_needs_namespace (die
->tag
)
3355 && die
->tag
!= DW_TAG_subprogram
3356 && die
->tag
!= DW_TAG_variable
3357 && die
->tag
!= DW_TAG_member
)
3360 prefix
= determine_prefix (die
, cu
);
3361 if (*prefix
!= '\0')
3362 name
= typename_concat (&cu
->objfile
->objfile_obstack
, prefix
,
3368 /* Read the import statement specified by the given die and record it. */
3371 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3373 struct attribute
*import_attr
;
3374 struct die_info
*imported_die
;
3375 struct dwarf2_cu
*imported_cu
;
3376 const char *imported_name
;
3377 const char *imported_name_prefix
;
3378 const char *import_prefix
;
3379 char *canonical_name
;
3381 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3382 if (import_attr
== NULL
)
3384 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3385 dwarf_tag_name (die
->tag
));
3390 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3391 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3392 if (imported_name
== NULL
)
3394 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3396 The import in the following code:
3410 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3411 <52> DW_AT_decl_file : 1
3412 <53> DW_AT_decl_line : 6
3413 <54> DW_AT_import : <0x75>
3414 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3416 <5b> DW_AT_decl_file : 1
3417 <5c> DW_AT_decl_line : 2
3418 <5d> DW_AT_type : <0x6e>
3420 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3421 <76> DW_AT_byte_size : 4
3422 <77> DW_AT_encoding : 5 (signed)
3424 imports the wrong die ( 0x75 instead of 0x58 ).
3425 This case will be ignored until the gcc bug is fixed. */
3429 /* FIXME: dwarf2_name (die); for the local name after import. */
3431 /* Figure out where the statement is being imported to. */
3432 import_prefix
= determine_prefix (die
, cu
);
3434 /* Figure out what the scope of the imported die is and prepend it
3435 to the name of the imported die. */
3436 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3438 if (strlen (imported_name_prefix
) > 0)
3440 canonical_name
= alloca (strlen (imported_name_prefix
) + 2 + strlen (imported_name
) + 1);
3441 strcpy (canonical_name
, imported_name_prefix
);
3442 strcat (canonical_name
, "::");
3443 strcat (canonical_name
, imported_name
);
3447 canonical_name
= alloca (strlen (imported_name
) + 1);
3448 strcpy (canonical_name
, imported_name
);
3451 using_directives
= cp_add_using (import_prefix
,canonical_name
, using_directives
);
3455 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3457 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3461 free_cu_line_header (void *arg
)
3463 struct dwarf2_cu
*cu
= arg
;
3465 free_line_header (cu
->line_header
);
3466 cu
->line_header
= NULL
;
3470 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3472 struct objfile
*objfile
= cu
->objfile
;
3473 struct comp_unit_head
*cu_header
= &cu
->header
;
3474 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3475 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3476 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3477 struct attribute
*attr
;
3479 char *comp_dir
= NULL
;
3480 struct die_info
*child_die
;
3481 bfd
*abfd
= objfile
->obfd
;
3482 struct line_header
*line_header
= 0;
3485 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3487 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3489 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3490 from finish_block. */
3491 if (lowpc
== ((CORE_ADDR
) -1))
3496 /* Find the filename. Do not use dwarf2_name here, since the filename
3497 is not a source language identifier. */
3498 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3501 name
= DW_STRING (attr
);
3504 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3506 comp_dir
= DW_STRING (attr
);
3507 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3509 comp_dir
= ldirname (name
);
3510 if (comp_dir
!= NULL
)
3511 make_cleanup (xfree
, comp_dir
);
3513 if (comp_dir
!= NULL
)
3515 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3516 directory, get rid of it. */
3517 char *cp
= strchr (comp_dir
, ':');
3519 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3526 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3529 set_cu_language (DW_UNSND (attr
), cu
);
3532 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3534 cu
->producer
= DW_STRING (attr
);
3536 /* We assume that we're processing GCC output. */
3537 processing_gcc_compilation
= 2;
3539 processing_has_namespace_info
= 0;
3541 start_symtab (name
, comp_dir
, lowpc
);
3542 record_debugformat ("DWARF 2");
3543 record_producer (cu
->producer
);
3545 initialize_cu_func_list (cu
);
3547 /* Decode line number information if present. We do this before
3548 processing child DIEs, so that the line header table is available
3549 for DW_AT_decl_file. */
3550 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3553 unsigned int line_offset
= DW_UNSND (attr
);
3554 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3557 cu
->line_header
= line_header
;
3558 make_cleanup (free_cu_line_header
, cu
);
3559 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3563 /* Process all dies in compilation unit. */
3564 if (die
->child
!= NULL
)
3566 child_die
= die
->child
;
3567 while (child_die
&& child_die
->tag
)
3569 process_die (child_die
, cu
);
3570 child_die
= sibling_die (child_die
);
3574 /* Decode macro information, if present. Dwarf 2 macro information
3575 refers to information in the line number info statement program
3576 header, so we can only read it if we've read the header
3578 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3579 if (attr
&& line_header
)
3581 unsigned int macro_offset
= DW_UNSND (attr
);
3582 dwarf_decode_macros (line_header
, macro_offset
,
3583 comp_dir
, abfd
, cu
);
3585 do_cleanups (back_to
);
3588 /* For TUs we want to skip the first top level sibling if it's not the
3589 actual type being defined by this TU. In this case the first top
3590 level sibling is there to provide context only. */
3593 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3595 struct objfile
*objfile
= cu
->objfile
;
3596 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3598 struct attribute
*attr
;
3600 char *comp_dir
= NULL
;
3601 struct die_info
*child_die
;
3602 bfd
*abfd
= objfile
->obfd
;
3603 struct line_header
*line_header
= 0;
3605 /* start_symtab needs a low pc, but we don't really have one.
3606 Do what read_file_scope would do in the absence of such info. */
3607 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3609 /* Find the filename. Do not use dwarf2_name here, since the filename
3610 is not a source language identifier. */
3611 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3613 name
= DW_STRING (attr
);
3615 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3617 comp_dir
= DW_STRING (attr
);
3618 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3620 comp_dir
= ldirname (name
);
3621 if (comp_dir
!= NULL
)
3622 make_cleanup (xfree
, comp_dir
);
3628 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3630 set_cu_language (DW_UNSND (attr
), cu
);
3632 /* This isn't technically needed today. It is done for symmetry
3633 with read_file_scope. */
3634 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3636 cu
->producer
= DW_STRING (attr
);
3638 /* We assume that we're processing GCC output. */
3639 processing_gcc_compilation
= 2;
3641 processing_has_namespace_info
= 0;
3643 start_symtab (name
, comp_dir
, lowpc
);
3644 record_debugformat ("DWARF 2");
3645 record_producer (cu
->producer
);
3647 /* Process the dies in the type unit. */
3648 if (die
->child
== NULL
)
3650 dump_die_for_error (die
);
3651 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3652 bfd_get_filename (abfd
));
3655 child_die
= die
->child
;
3657 while (child_die
&& child_die
->tag
)
3659 process_die (child_die
, cu
);
3661 child_die
= sibling_die (child_die
);
3664 do_cleanups (back_to
);
3668 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3669 struct dwarf2_cu
*cu
)
3671 struct function_range
*thisfn
;
3673 thisfn
= (struct function_range
*)
3674 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3675 thisfn
->name
= name
;
3676 thisfn
->lowpc
= lowpc
;
3677 thisfn
->highpc
= highpc
;
3678 thisfn
->seen_line
= 0;
3679 thisfn
->next
= NULL
;
3681 if (cu
->last_fn
== NULL
)
3682 cu
->first_fn
= thisfn
;
3684 cu
->last_fn
->next
= thisfn
;
3686 cu
->last_fn
= thisfn
;
3689 /* qsort helper for inherit_abstract_dies. */
3692 unsigned_int_compar (const void *ap
, const void *bp
)
3694 unsigned int a
= *(unsigned int *) ap
;
3695 unsigned int b
= *(unsigned int *) bp
;
3697 return (a
> b
) - (b
> a
);
3700 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3701 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3702 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3705 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3707 struct die_info
*child_die
;
3708 unsigned die_children_count
;
3709 /* CU offsets which were referenced by children of the current DIE. */
3711 unsigned *offsets_end
, *offsetp
;
3712 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3713 struct die_info
*origin_die
;
3714 /* Iterator of the ORIGIN_DIE children. */
3715 struct die_info
*origin_child_die
;
3716 struct cleanup
*cleanups
;
3717 struct attribute
*attr
;
3719 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3723 origin_die
= follow_die_ref (die
, attr
, &cu
);
3724 if (die
->tag
!= origin_die
->tag
3725 && !(die
->tag
== DW_TAG_inlined_subroutine
3726 && origin_die
->tag
== DW_TAG_subprogram
))
3727 complaint (&symfile_complaints
,
3728 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3729 die
->offset
, origin_die
->offset
);
3731 child_die
= die
->child
;
3732 die_children_count
= 0;
3733 while (child_die
&& child_die
->tag
)
3735 child_die
= sibling_die (child_die
);
3736 die_children_count
++;
3738 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3739 cleanups
= make_cleanup (xfree
, offsets
);
3741 offsets_end
= offsets
;
3742 child_die
= die
->child
;
3743 while (child_die
&& child_die
->tag
)
3745 /* For each CHILD_DIE, find the corresponding child of
3746 ORIGIN_DIE. If there is more than one layer of
3747 DW_AT_abstract_origin, follow them all; there shouldn't be,
3748 but GCC versions at least through 4.4 generate this (GCC PR
3750 struct die_info
*child_origin_die
= child_die
;
3753 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3756 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3759 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3760 counterpart may exist. */
3761 if (child_origin_die
!= child_die
)
3763 if (child_die
->tag
!= child_origin_die
->tag
3764 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3765 && child_origin_die
->tag
== DW_TAG_subprogram
))
3766 complaint (&symfile_complaints
,
3767 _("Child DIE 0x%x and its abstract origin 0x%x have "
3768 "different tags"), child_die
->offset
,
3769 child_origin_die
->offset
);
3770 if (child_origin_die
->parent
!= origin_die
)
3771 complaint (&symfile_complaints
,
3772 _("Child DIE 0x%x and its abstract origin 0x%x have "
3773 "different parents"), child_die
->offset
,
3774 child_origin_die
->offset
);
3776 *offsets_end
++ = child_origin_die
->offset
;
3778 child_die
= sibling_die (child_die
);
3780 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3781 unsigned_int_compar
);
3782 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3783 if (offsetp
[-1] == *offsetp
)
3784 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3785 "to DIE 0x%x as their abstract origin"),
3786 die
->offset
, *offsetp
);
3789 origin_child_die
= origin_die
->child
;
3790 while (origin_child_die
&& origin_child_die
->tag
)
3792 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3793 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3795 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3797 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3798 process_die (origin_child_die
, cu
);
3800 origin_child_die
= sibling_die (origin_child_die
);
3803 do_cleanups (cleanups
);
3807 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3809 struct objfile
*objfile
= cu
->objfile
;
3810 struct context_stack
*new;
3813 struct die_info
*child_die
;
3814 struct attribute
*attr
, *call_line
, *call_file
;
3817 struct block
*block
;
3818 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3822 /* If we do not have call site information, we can't show the
3823 caller of this inlined function. That's too confusing, so
3824 only use the scope for local variables. */
3825 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3826 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3827 if (call_line
== NULL
|| call_file
== NULL
)
3829 read_lexical_block_scope (die
, cu
);
3834 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3836 name
= dwarf2_linkage_name (die
, cu
);
3838 /* Ignore functions with missing or empty names and functions with
3839 missing or invalid low and high pc attributes. */
3840 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3846 /* Record the function range for dwarf_decode_lines. */
3847 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3849 new = push_context (0, lowpc
);
3850 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3852 /* If there is a location expression for DW_AT_frame_base, record
3854 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3856 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3857 expression is being recorded directly in the function's symbol
3858 and not in a separate frame-base object. I guess this hack is
3859 to avoid adding some sort of frame-base adjunct/annex to the
3860 function's symbol :-(. The problem with doing this is that it
3861 results in a function symbol with a location expression that
3862 has nothing to do with the location of the function, ouch! The
3863 relationship should be: a function's symbol has-a frame base; a
3864 frame-base has-a location expression. */
3865 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3867 cu
->list_in_scope
= &local_symbols
;
3869 if (die
->child
!= NULL
)
3871 child_die
= die
->child
;
3872 while (child_die
&& child_die
->tag
)
3874 process_die (child_die
, cu
);
3875 child_die
= sibling_die (child_die
);
3879 inherit_abstract_dies (die
, cu
);
3881 new = pop_context ();
3882 /* Make a block for the local symbols within. */
3883 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3884 lowpc
, highpc
, objfile
);
3886 /* For C++, set the block's scope. */
3887 if (cu
->language
== language_cplus
)
3888 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3889 determine_prefix (die
, cu
),
3890 processing_has_namespace_info
);
3892 /* If we have address ranges, record them. */
3893 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3895 /* In C++, we can have functions nested inside functions (e.g., when
3896 a function declares a class that has methods). This means that
3897 when we finish processing a function scope, we may need to go
3898 back to building a containing block's symbol lists. */
3899 local_symbols
= new->locals
;
3900 param_symbols
= new->params
;
3901 using_directives
= new->using_directives
;
3903 /* If we've finished processing a top-level function, subsequent
3904 symbols go in the file symbol list. */
3905 if (outermost_context_p ())
3906 cu
->list_in_scope
= &file_symbols
;
3909 /* Process all the DIES contained within a lexical block scope. Start
3910 a new scope, process the dies, and then close the scope. */
3913 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3915 struct objfile
*objfile
= cu
->objfile
;
3916 struct context_stack
*new;
3917 CORE_ADDR lowpc
, highpc
;
3918 struct die_info
*child_die
;
3921 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3923 /* Ignore blocks with missing or invalid low and high pc attributes. */
3924 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3925 as multiple lexical blocks? Handling children in a sane way would
3926 be nasty. Might be easier to properly extend generic blocks to
3928 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3933 push_context (0, lowpc
);
3934 if (die
->child
!= NULL
)
3936 child_die
= die
->child
;
3937 while (child_die
&& child_die
->tag
)
3939 process_die (child_die
, cu
);
3940 child_die
= sibling_die (child_die
);
3943 new = pop_context ();
3945 if (local_symbols
!= NULL
)
3948 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3951 /* Note that recording ranges after traversing children, as we
3952 do here, means that recording a parent's ranges entails
3953 walking across all its children's ranges as they appear in
3954 the address map, which is quadratic behavior.
3956 It would be nicer to record the parent's ranges before
3957 traversing its children, simply overriding whatever you find
3958 there. But since we don't even decide whether to create a
3959 block until after we've traversed its children, that's hard
3961 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3963 local_symbols
= new->locals
;
3964 using_directives
= new->using_directives
;
3967 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3968 Return 1 if the attributes are present and valid, otherwise, return 0.
3969 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3972 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3973 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
3974 struct partial_symtab
*ranges_pst
)
3976 struct objfile
*objfile
= cu
->objfile
;
3977 struct comp_unit_head
*cu_header
= &cu
->header
;
3978 bfd
*obfd
= objfile
->obfd
;
3979 unsigned int addr_size
= cu_header
->addr_size
;
3980 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3981 /* Base address selection entry. */
3992 found_base
= cu
->base_known
;
3993 base
= cu
->base_address
;
3995 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
3997 complaint (&symfile_complaints
,
3998 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4002 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4004 /* Read in the largest possible address. */
4005 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4006 if ((marker
& mask
) == mask
)
4008 /* If we found the largest possible address, then
4009 read the base address. */
4010 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4011 buffer
+= 2 * addr_size
;
4012 offset
+= 2 * addr_size
;
4018 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4022 CORE_ADDR range_beginning
, range_end
;
4024 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4025 buffer
+= addr_size
;
4026 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4027 buffer
+= addr_size
;
4028 offset
+= 2 * addr_size
;
4030 /* An end of list marker is a pair of zero addresses. */
4031 if (range_beginning
== 0 && range_end
== 0)
4032 /* Found the end of list entry. */
4035 /* Each base address selection entry is a pair of 2 values.
4036 The first is the largest possible address, the second is
4037 the base address. Check for a base address here. */
4038 if ((range_beginning
& mask
) == mask
)
4040 /* If we found the largest possible address, then
4041 read the base address. */
4042 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4049 /* We have no valid base address for the ranges
4051 complaint (&symfile_complaints
,
4052 _("Invalid .debug_ranges data (no base address)"));
4056 range_beginning
+= base
;
4059 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4060 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4061 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4064 /* FIXME: This is recording everything as a low-high
4065 segment of consecutive addresses. We should have a
4066 data structure for discontiguous block ranges
4070 low
= range_beginning
;
4076 if (range_beginning
< low
)
4077 low
= range_beginning
;
4078 if (range_end
> high
)
4084 /* If the first entry is an end-of-list marker, the range
4085 describes an empty scope, i.e. no instructions. */
4091 *high_return
= high
;
4095 /* Get low and high pc attributes from a die. Return 1 if the attributes
4096 are present and valid, otherwise, return 0. Return -1 if the range is
4097 discontinuous, i.e. derived from DW_AT_ranges information. */
4099 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4100 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4101 struct partial_symtab
*pst
)
4103 struct attribute
*attr
;
4108 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4111 high
= DW_ADDR (attr
);
4112 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4114 low
= DW_ADDR (attr
);
4116 /* Found high w/o low attribute. */
4119 /* Found consecutive range of addresses. */
4124 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4127 /* Value of the DW_AT_ranges attribute is the offset in the
4128 .debug_ranges section. */
4129 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4131 /* Found discontinuous range of addresses. */
4139 /* When using the GNU linker, .gnu.linkonce. sections are used to
4140 eliminate duplicate copies of functions and vtables and such.
4141 The linker will arbitrarily choose one and discard the others.
4142 The AT_*_pc values for such functions refer to local labels in
4143 these sections. If the section from that file was discarded, the
4144 labels are not in the output, so the relocs get a value of 0.
4145 If this is a discarded function, mark the pc bounds as invalid,
4146 so that GDB will ignore it. */
4147 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4155 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4156 its low and high PC addresses. Do nothing if these addresses could not
4157 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4158 and HIGHPC to the high address if greater than HIGHPC. */
4161 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4162 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4163 struct dwarf2_cu
*cu
)
4165 CORE_ADDR low
, high
;
4166 struct die_info
*child
= die
->child
;
4168 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4170 *lowpc
= min (*lowpc
, low
);
4171 *highpc
= max (*highpc
, high
);
4174 /* If the language does not allow nested subprograms (either inside
4175 subprograms or lexical blocks), we're done. */
4176 if (cu
->language
!= language_ada
)
4179 /* Check all the children of the given DIE. If it contains nested
4180 subprograms, then check their pc bounds. Likewise, we need to
4181 check lexical blocks as well, as they may also contain subprogram
4183 while (child
&& child
->tag
)
4185 if (child
->tag
== DW_TAG_subprogram
4186 || child
->tag
== DW_TAG_lexical_block
)
4187 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4188 child
= sibling_die (child
);
4192 /* Get the low and high pc's represented by the scope DIE, and store
4193 them in *LOWPC and *HIGHPC. If the correct values can't be
4194 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4197 get_scope_pc_bounds (struct die_info
*die
,
4198 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4199 struct dwarf2_cu
*cu
)
4201 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4202 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4203 CORE_ADDR current_low
, current_high
;
4205 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4207 best_low
= current_low
;
4208 best_high
= current_high
;
4212 struct die_info
*child
= die
->child
;
4214 while (child
&& child
->tag
)
4216 switch (child
->tag
) {
4217 case DW_TAG_subprogram
:
4218 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4220 case DW_TAG_namespace
:
4221 /* FIXME: carlton/2004-01-16: Should we do this for
4222 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4223 that current GCC's always emit the DIEs corresponding
4224 to definitions of methods of classes as children of a
4225 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4226 the DIEs giving the declarations, which could be
4227 anywhere). But I don't see any reason why the
4228 standards says that they have to be there. */
4229 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4231 if (current_low
!= ((CORE_ADDR
) -1))
4233 best_low
= min (best_low
, current_low
);
4234 best_high
= max (best_high
, current_high
);
4242 child
= sibling_die (child
);
4247 *highpc
= best_high
;
4250 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4253 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4254 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4256 struct attribute
*attr
;
4258 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4261 CORE_ADDR high
= DW_ADDR (attr
);
4262 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4265 CORE_ADDR low
= DW_ADDR (attr
);
4266 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4270 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4273 bfd
*obfd
= cu
->objfile
->obfd
;
4275 /* The value of the DW_AT_ranges attribute is the offset of the
4276 address range list in the .debug_ranges section. */
4277 unsigned long offset
= DW_UNSND (attr
);
4278 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4280 /* For some target architectures, but not others, the
4281 read_address function sign-extends the addresses it returns.
4282 To recognize base address selection entries, we need a
4284 unsigned int addr_size
= cu
->header
.addr_size
;
4285 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4287 /* The base address, to which the next pair is relative. Note
4288 that this 'base' is a DWARF concept: most entries in a range
4289 list are relative, to reduce the number of relocs against the
4290 debugging information. This is separate from this function's
4291 'baseaddr' argument, which GDB uses to relocate debugging
4292 information from a shared library based on the address at
4293 which the library was loaded. */
4294 CORE_ADDR base
= cu
->base_address
;
4295 int base_known
= cu
->base_known
;
4297 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4299 complaint (&symfile_complaints
,
4300 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4307 unsigned int bytes_read
;
4308 CORE_ADDR start
, end
;
4310 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4311 buffer
+= bytes_read
;
4312 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4313 buffer
+= bytes_read
;
4315 /* Did we find the end of the range list? */
4316 if (start
== 0 && end
== 0)
4319 /* Did we find a base address selection entry? */
4320 else if ((start
& base_select_mask
) == base_select_mask
)
4326 /* We found an ordinary address range. */
4331 complaint (&symfile_complaints
,
4332 _("Invalid .debug_ranges data (no base address)"));
4336 record_block_range (block
,
4337 baseaddr
+ base
+ start
,
4338 baseaddr
+ base
+ end
- 1);
4344 /* Add an aggregate field to the field list. */
4347 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4348 struct dwarf2_cu
*cu
)
4350 struct objfile
*objfile
= cu
->objfile
;
4351 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4352 struct nextfield
*new_field
;
4353 struct attribute
*attr
;
4355 char *fieldname
= "";
4357 /* Allocate a new field list entry and link it in. */
4358 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4359 make_cleanup (xfree
, new_field
);
4360 memset (new_field
, 0, sizeof (struct nextfield
));
4361 new_field
->next
= fip
->fields
;
4362 fip
->fields
= new_field
;
4365 /* Handle accessibility and virtuality of field.
4366 The default accessibility for members is public, the default
4367 accessibility for inheritance is private. */
4368 if (die
->tag
!= DW_TAG_inheritance
)
4369 new_field
->accessibility
= DW_ACCESS_public
;
4371 new_field
->accessibility
= DW_ACCESS_private
;
4372 new_field
->virtuality
= DW_VIRTUALITY_none
;
4374 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4376 new_field
->accessibility
= DW_UNSND (attr
);
4377 if (new_field
->accessibility
!= DW_ACCESS_public
)
4378 fip
->non_public_fields
= 1;
4379 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4381 new_field
->virtuality
= DW_UNSND (attr
);
4383 fp
= &new_field
->field
;
4385 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4387 /* Data member other than a C++ static data member. */
4389 /* Get type of field. */
4390 fp
->type
= die_type (die
, cu
);
4392 SET_FIELD_BITPOS (*fp
, 0);
4394 /* Get bit size of field (zero if none). */
4395 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4398 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4402 FIELD_BITSIZE (*fp
) = 0;
4405 /* Get bit offset of field. */
4406 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4409 int byte_offset
= 0;
4411 if (attr_form_is_section_offset (attr
))
4412 dwarf2_complex_location_expr_complaint ();
4413 else if (attr_form_is_constant (attr
))
4414 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4415 else if (attr_form_is_block (attr
))
4416 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4418 dwarf2_complex_location_expr_complaint ();
4420 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4422 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4425 if (gdbarch_bits_big_endian (gdbarch
))
4427 /* For big endian bits, the DW_AT_bit_offset gives the
4428 additional bit offset from the MSB of the containing
4429 anonymous object to the MSB of the field. We don't
4430 have to do anything special since we don't need to
4431 know the size of the anonymous object. */
4432 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4436 /* For little endian bits, compute the bit offset to the
4437 MSB of the anonymous object, subtract off the number of
4438 bits from the MSB of the field to the MSB of the
4439 object, and then subtract off the number of bits of
4440 the field itself. The result is the bit offset of
4441 the LSB of the field. */
4443 int bit_offset
= DW_UNSND (attr
);
4445 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4448 /* The size of the anonymous object containing
4449 the bit field is explicit, so use the
4450 indicated size (in bytes). */
4451 anonymous_size
= DW_UNSND (attr
);
4455 /* The size of the anonymous object containing
4456 the bit field must be inferred from the type
4457 attribute of the data member containing the
4459 anonymous_size
= TYPE_LENGTH (fp
->type
);
4461 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4462 - bit_offset
- FIELD_BITSIZE (*fp
);
4466 /* Get name of field. */
4467 fieldname
= dwarf2_name (die
, cu
);
4468 if (fieldname
== NULL
)
4471 /* The name is already allocated along with this objfile, so we don't
4472 need to duplicate it for the type. */
4473 fp
->name
= fieldname
;
4475 /* Change accessibility for artificial fields (e.g. virtual table
4476 pointer or virtual base class pointer) to private. */
4477 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4479 new_field
->accessibility
= DW_ACCESS_private
;
4480 fip
->non_public_fields
= 1;
4483 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4485 /* C++ static member. */
4487 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4488 is a declaration, but all versions of G++ as of this writing
4489 (so through at least 3.2.1) incorrectly generate
4490 DW_TAG_variable tags. */
4494 /* Get name of field. */
4495 fieldname
= dwarf2_name (die
, cu
);
4496 if (fieldname
== NULL
)
4499 /* Get physical name. */
4500 physname
= dwarf2_linkage_name (die
, cu
);
4502 /* The name is already allocated along with this objfile, so we don't
4503 need to duplicate it for the type. */
4504 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4505 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4506 FIELD_NAME (*fp
) = fieldname
;
4508 else if (die
->tag
== DW_TAG_inheritance
)
4510 /* C++ base class field. */
4511 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4514 int byte_offset
= 0;
4516 if (attr_form_is_section_offset (attr
))
4517 dwarf2_complex_location_expr_complaint ();
4518 else if (attr_form_is_constant (attr
))
4519 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4520 else if (attr_form_is_block (attr
))
4521 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4523 dwarf2_complex_location_expr_complaint ();
4525 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4527 FIELD_BITSIZE (*fp
) = 0;
4528 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4529 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4530 fip
->nbaseclasses
++;
4534 /* Create the vector of fields, and attach it to the type. */
4537 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4538 struct dwarf2_cu
*cu
)
4540 int nfields
= fip
->nfields
;
4542 /* Record the field count, allocate space for the array of fields,
4543 and create blank accessibility bitfields if necessary. */
4544 TYPE_NFIELDS (type
) = nfields
;
4545 TYPE_FIELDS (type
) = (struct field
*)
4546 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4547 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4549 if (fip
->non_public_fields
)
4551 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4553 TYPE_FIELD_PRIVATE_BITS (type
) =
4554 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4555 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4557 TYPE_FIELD_PROTECTED_BITS (type
) =
4558 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4559 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4561 TYPE_FIELD_IGNORE_BITS (type
) =
4562 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4563 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4566 /* If the type has baseclasses, allocate and clear a bit vector for
4567 TYPE_FIELD_VIRTUAL_BITS. */
4568 if (fip
->nbaseclasses
)
4570 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4571 unsigned char *pointer
;
4573 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4574 pointer
= TYPE_ALLOC (type
, num_bytes
);
4575 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4576 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4577 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4580 /* Copy the saved-up fields into the field vector. Start from the head
4581 of the list, adding to the tail of the field array, so that they end
4582 up in the same order in the array in which they were added to the list. */
4583 while (nfields
-- > 0)
4585 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
4586 switch (fip
->fields
->accessibility
)
4588 case DW_ACCESS_private
:
4589 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4592 case DW_ACCESS_protected
:
4593 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4596 case DW_ACCESS_public
:
4600 /* Unknown accessibility. Complain and treat it as public. */
4602 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4603 fip
->fields
->accessibility
);
4607 if (nfields
< fip
->nbaseclasses
)
4609 switch (fip
->fields
->virtuality
)
4611 case DW_VIRTUALITY_virtual
:
4612 case DW_VIRTUALITY_pure_virtual
:
4613 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4617 fip
->fields
= fip
->fields
->next
;
4621 /* Add a member function to the proper fieldlist. */
4624 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4625 struct type
*type
, struct dwarf2_cu
*cu
)
4627 struct objfile
*objfile
= cu
->objfile
;
4628 struct attribute
*attr
;
4629 struct fnfieldlist
*flp
;
4631 struct fn_field
*fnp
;
4634 struct nextfnfield
*new_fnfield
;
4635 struct type
*this_type
;
4637 /* Get name of member function. */
4638 fieldname
= dwarf2_name (die
, cu
);
4639 if (fieldname
== NULL
)
4642 /* Get the mangled name. */
4643 physname
= dwarf2_linkage_name (die
, cu
);
4645 /* Look up member function name in fieldlist. */
4646 for (i
= 0; i
< fip
->nfnfields
; i
++)
4648 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4652 /* Create new list element if necessary. */
4653 if (i
< fip
->nfnfields
)
4654 flp
= &fip
->fnfieldlists
[i
];
4657 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4659 fip
->fnfieldlists
= (struct fnfieldlist
*)
4660 xrealloc (fip
->fnfieldlists
,
4661 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4662 * sizeof (struct fnfieldlist
));
4663 if (fip
->nfnfields
== 0)
4664 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4666 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4667 flp
->name
= fieldname
;
4673 /* Create a new member function field and chain it to the field list
4675 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4676 make_cleanup (xfree
, new_fnfield
);
4677 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4678 new_fnfield
->next
= flp
->head
;
4679 flp
->head
= new_fnfield
;
4682 /* Fill in the member function field info. */
4683 fnp
= &new_fnfield
->fnfield
;
4684 /* The name is already allocated along with this objfile, so we don't
4685 need to duplicate it for the type. */
4686 fnp
->physname
= physname
? physname
: "";
4687 fnp
->type
= alloc_type (objfile
);
4688 this_type
= read_type_die (die
, cu
);
4689 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4691 int nparams
= TYPE_NFIELDS (this_type
);
4693 /* TYPE is the domain of this method, and THIS_TYPE is the type
4694 of the method itself (TYPE_CODE_METHOD). */
4695 smash_to_method_type (fnp
->type
, type
,
4696 TYPE_TARGET_TYPE (this_type
),
4697 TYPE_FIELDS (this_type
),
4698 TYPE_NFIELDS (this_type
),
4699 TYPE_VARARGS (this_type
));
4701 /* Handle static member functions.
4702 Dwarf2 has no clean way to discern C++ static and non-static
4703 member functions. G++ helps GDB by marking the first
4704 parameter for non-static member functions (which is the
4705 this pointer) as artificial. We obtain this information
4706 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4707 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4708 fnp
->voffset
= VOFFSET_STATIC
;
4711 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4714 /* Get fcontext from DW_AT_containing_type if present. */
4715 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4716 fnp
->fcontext
= die_containing_type (die
, cu
);
4718 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4719 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4721 /* Get accessibility. */
4722 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4725 switch (DW_UNSND (attr
))
4727 case DW_ACCESS_private
:
4728 fnp
->is_private
= 1;
4730 case DW_ACCESS_protected
:
4731 fnp
->is_protected
= 1;
4736 /* Check for artificial methods. */
4737 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4738 if (attr
&& DW_UNSND (attr
) != 0)
4739 fnp
->is_artificial
= 1;
4741 /* Get index in virtual function table if it is a virtual member function. */
4742 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4745 /* Support the .debug_loc offsets */
4746 if (attr_form_is_block (attr
))
4748 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4750 else if (attr_form_is_section_offset (attr
))
4752 dwarf2_complex_location_expr_complaint ();
4756 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4762 /* Create the vector of member function fields, and attach it to the type. */
4765 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4766 struct dwarf2_cu
*cu
)
4768 struct fnfieldlist
*flp
;
4769 int total_length
= 0;
4772 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4773 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4774 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4776 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4778 struct nextfnfield
*nfp
= flp
->head
;
4779 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4782 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4783 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4784 fn_flp
->fn_fields
= (struct fn_field
*)
4785 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4786 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4787 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4789 total_length
+= flp
->length
;
4792 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4793 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4796 /* Returns non-zero if NAME is the name of a vtable member in CU's
4797 language, zero otherwise. */
4799 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4801 static const char vptr
[] = "_vptr";
4802 static const char vtable
[] = "vtable";
4804 /* Look for the C++ and Java forms of the vtable. */
4805 if ((cu
->language
== language_java
4806 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4807 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4808 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4814 /* GCC outputs unnamed structures that are really pointers to member
4815 functions, with the ABI-specified layout. If DIE (from CU) describes
4816 such a structure, set its type, and return nonzero. Otherwise return
4819 GCC shouldn't do this; it should just output pointer to member DIEs.
4820 This is GCC PR debug/28767. */
4822 static struct type
*
4823 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
4825 struct objfile
*objfile
= cu
->objfile
;
4827 struct die_info
*pfn_die
, *delta_die
;
4828 struct attribute
*pfn_name
, *delta_name
;
4829 struct type
*pfn_type
, *domain_type
;
4831 /* Check for a structure with no name and two children. */
4832 if (die
->tag
!= DW_TAG_structure_type
4833 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
4834 || die
->child
== NULL
4835 || die
->child
->sibling
== NULL
4836 || (die
->child
->sibling
->sibling
!= NULL
4837 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
4840 /* Check for __pfn and __delta members. */
4841 pfn_die
= die
->child
;
4842 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
4843 if (pfn_die
->tag
!= DW_TAG_member
4845 || DW_STRING (pfn_name
) == NULL
4846 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
4849 delta_die
= pfn_die
->sibling
;
4850 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
4851 if (delta_die
->tag
!= DW_TAG_member
4852 || delta_name
== NULL
4853 || DW_STRING (delta_name
) == NULL
4854 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
4857 /* Find the type of the method. */
4858 pfn_type
= die_type (pfn_die
, cu
);
4859 if (pfn_type
== NULL
4860 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
4861 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
4864 /* Look for the "this" argument. */
4865 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
4866 if (TYPE_NFIELDS (pfn_type
) == 0
4867 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
4870 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
4871 type
= alloc_type (objfile
);
4872 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
4873 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
4874 TYPE_VARARGS (pfn_type
));
4875 type
= lookup_methodptr_type (type
);
4876 return set_die_type (die
, type
, cu
);
4879 /* Called when we find the DIE that starts a structure or union scope
4880 (definition) to process all dies that define the members of the
4883 NOTE: we need to call struct_type regardless of whether or not the
4884 DIE has an at_name attribute, since it might be an anonymous
4885 structure or union. This gets the type entered into our set of
4888 However, if the structure is incomplete (an opaque struct/union)
4889 then suppress creating a symbol table entry for it since gdb only
4890 wants to find the one with the complete definition. Note that if
4891 it is complete, we just call new_symbol, which does it's own
4892 checking about whether the struct/union is anonymous or not (and
4893 suppresses creating a symbol table entry itself). */
4895 static struct type
*
4896 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4898 struct objfile
*objfile
= cu
->objfile
;
4900 struct attribute
*attr
;
4902 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4904 type
= quirk_gcc_member_function_pointer (die
, cu
);
4908 /* If the definition of this type lives in .debug_types, read that type.
4909 Don't follow DW_AT_specification though, that will take us back up
4910 the chain and we want to go down. */
4911 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
4914 struct dwarf2_cu
*type_cu
= cu
;
4915 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
4916 /* We could just recurse on read_structure_type, but we need to call
4917 get_die_type to ensure only one type for this DIE is created.
4918 This is important, for example, because for c++ classes we need
4919 TYPE_NAME set which is only done by new_symbol. Blech. */
4920 type
= read_type_die (type_die
, type_cu
);
4921 return set_die_type (die
, type
, cu
);
4924 type
= alloc_type (objfile
);
4925 INIT_CPLUS_SPECIFIC (type
);
4927 name
= dwarf2_name (die
, cu
);
4930 if (cu
->language
== language_cplus
4931 || cu
->language
== language_java
)
4933 const char *new_prefix
= determine_class_name (die
, cu
);
4934 TYPE_TAG_NAME (type
) = (char *) new_prefix
;
4938 /* The name is already allocated along with this objfile, so
4939 we don't need to duplicate it for the type. */
4940 TYPE_TAG_NAME (type
) = name
;
4944 if (die
->tag
== DW_TAG_structure_type
)
4946 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
4948 else if (die
->tag
== DW_TAG_union_type
)
4950 TYPE_CODE (type
) = TYPE_CODE_UNION
;
4954 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
4956 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
4959 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4962 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4966 TYPE_LENGTH (type
) = 0;
4969 TYPE_STUB_SUPPORTED (type
) = 1;
4970 if (die_is_declaration (die
, cu
))
4971 TYPE_STUB (type
) = 1;
4973 /* We need to add the type field to the die immediately so we don't
4974 infinitely recurse when dealing with pointers to the structure
4975 type within the structure itself. */
4976 set_die_type (die
, type
, cu
);
4978 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
4980 struct field_info fi
;
4981 struct die_info
*child_die
;
4983 memset (&fi
, 0, sizeof (struct field_info
));
4985 child_die
= die
->child
;
4987 while (child_die
&& child_die
->tag
)
4989 if (child_die
->tag
== DW_TAG_member
4990 || child_die
->tag
== DW_TAG_variable
)
4992 /* NOTE: carlton/2002-11-05: A C++ static data member
4993 should be a DW_TAG_member that is a declaration, but
4994 all versions of G++ as of this writing (so through at
4995 least 3.2.1) incorrectly generate DW_TAG_variable
4996 tags for them instead. */
4997 dwarf2_add_field (&fi
, child_die
, cu
);
4999 else if (child_die
->tag
== DW_TAG_subprogram
)
5001 /* C++ member function. */
5002 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5004 else if (child_die
->tag
== DW_TAG_inheritance
)
5006 /* C++ base class field. */
5007 dwarf2_add_field (&fi
, child_die
, cu
);
5009 child_die
= sibling_die (child_die
);
5012 /* Attach fields and member functions to the type. */
5014 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5017 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5019 /* Get the type which refers to the base class (possibly this
5020 class itself) which contains the vtable pointer for the current
5021 class from the DW_AT_containing_type attribute. */
5023 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5025 struct type
*t
= die_containing_type (die
, cu
);
5027 TYPE_VPTR_BASETYPE (type
) = t
;
5032 /* Our own class provides vtbl ptr. */
5033 for (i
= TYPE_NFIELDS (t
) - 1;
5034 i
>= TYPE_N_BASECLASSES (t
);
5037 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5039 if (is_vtable_name (fieldname
, cu
))
5041 TYPE_VPTR_FIELDNO (type
) = i
;
5046 /* Complain if virtual function table field not found. */
5047 if (i
< TYPE_N_BASECLASSES (t
))
5048 complaint (&symfile_complaints
,
5049 _("virtual function table pointer not found when defining class '%s'"),
5050 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5055 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5058 else if (cu
->producer
5059 && strncmp (cu
->producer
,
5060 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5062 /* The IBM XLC compiler does not provide direct indication
5063 of the containing type, but the vtable pointer is
5064 always named __vfp. */
5068 for (i
= TYPE_NFIELDS (type
) - 1;
5069 i
>= TYPE_N_BASECLASSES (type
);
5072 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5074 TYPE_VPTR_FIELDNO (type
) = i
;
5075 TYPE_VPTR_BASETYPE (type
) = type
;
5083 do_cleanups (back_to
);
5088 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5090 struct objfile
*objfile
= cu
->objfile
;
5091 struct die_info
*child_die
= die
->child
;
5092 struct type
*this_type
;
5094 this_type
= get_die_type (die
, cu
);
5095 if (this_type
== NULL
)
5096 this_type
= read_structure_type (die
, cu
);
5098 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5099 snapshots) has been known to create a die giving a declaration
5100 for a class that has, as a child, a die giving a definition for a
5101 nested class. So we have to process our children even if the
5102 current die is a declaration. Normally, of course, a declaration
5103 won't have any children at all. */
5105 while (child_die
!= NULL
&& child_die
->tag
)
5107 if (child_die
->tag
== DW_TAG_member
5108 || child_die
->tag
== DW_TAG_variable
5109 || child_die
->tag
== DW_TAG_inheritance
)
5114 process_die (child_die
, cu
);
5116 child_die
= sibling_die (child_die
);
5119 /* Do not consider external references. According to the DWARF standard,
5120 these DIEs are identified by the fact that they have no byte_size
5121 attribute, and a declaration attribute. */
5122 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5123 || !die_is_declaration (die
, cu
))
5124 new_symbol (die
, this_type
, cu
);
5127 /* Given a DW_AT_enumeration_type die, set its type. We do not
5128 complete the type's fields yet, or create any symbols. */
5130 static struct type
*
5131 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5133 struct objfile
*objfile
= cu
->objfile
;
5135 struct attribute
*attr
;
5138 /* If the definition of this type lives in .debug_types, read that type.
5139 Don't follow DW_AT_specification though, that will take us back up
5140 the chain and we want to go down. */
5141 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5144 struct dwarf2_cu
*type_cu
= cu
;
5145 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5146 type
= read_type_die (type_die
, type_cu
);
5147 return set_die_type (die
, type
, cu
);
5150 type
= alloc_type (objfile
);
5152 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5153 name
= dwarf2_full_name (die
, cu
);
5155 TYPE_TAG_NAME (type
) = (char *) name
;
5157 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5160 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5164 TYPE_LENGTH (type
) = 0;
5167 /* The enumeration DIE can be incomplete. In Ada, any type can be
5168 declared as private in the package spec, and then defined only
5169 inside the package body. Such types are known as Taft Amendment
5170 Types. When another package uses such a type, an incomplete DIE
5171 may be generated by the compiler. */
5172 if (die_is_declaration (die
, cu
))
5173 TYPE_STUB (type
) = 1;
5175 return set_die_type (die
, type
, cu
);
5178 /* Determine the name of the type represented by DIE, which should be
5179 a named C++ or Java compound type. Return the name in question,
5180 allocated on the objfile obstack. */
5183 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
5185 const char *new_prefix
= NULL
;
5187 /* If we don't have namespace debug info, guess the name by trying
5188 to demangle the names of members, just like we did in
5189 guess_structure_name. */
5190 if (!processing_has_namespace_info
)
5192 struct die_info
*child
;
5194 for (child
= die
->child
;
5195 child
!= NULL
&& child
->tag
!= 0;
5196 child
= sibling_die (child
))
5198 if (child
->tag
== DW_TAG_subprogram
)
5201 = language_class_name_from_physname (cu
->language_defn
,
5205 if (phys_prefix
!= NULL
)
5208 = obsavestring (phys_prefix
, strlen (phys_prefix
),
5209 &cu
->objfile
->objfile_obstack
);
5210 xfree (phys_prefix
);
5217 if (new_prefix
== NULL
)
5218 new_prefix
= dwarf2_full_name (die
, cu
);
5223 /* Given a pointer to a die which begins an enumeration, process all
5224 the dies that define the members of the enumeration, and create the
5225 symbol for the enumeration type.
5227 NOTE: We reverse the order of the element list. */
5230 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5232 struct objfile
*objfile
= cu
->objfile
;
5233 struct die_info
*child_die
;
5234 struct field
*fields
;
5237 int unsigned_enum
= 1;
5239 struct type
*this_type
;
5243 this_type
= get_die_type (die
, cu
);
5244 if (this_type
== NULL
)
5245 this_type
= read_enumeration_type (die
, cu
);
5246 if (die
->child
!= NULL
)
5248 child_die
= die
->child
;
5249 while (child_die
&& child_die
->tag
)
5251 if (child_die
->tag
!= DW_TAG_enumerator
)
5253 process_die (child_die
, cu
);
5257 name
= dwarf2_name (child_die
, cu
);
5260 sym
= new_symbol (child_die
, this_type
, cu
);
5261 if (SYMBOL_VALUE (sym
) < 0)
5264 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5266 fields
= (struct field
*)
5268 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5269 * sizeof (struct field
));
5272 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5273 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5274 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5275 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5281 child_die
= sibling_die (child_die
);
5286 TYPE_NFIELDS (this_type
) = num_fields
;
5287 TYPE_FIELDS (this_type
) = (struct field
*)
5288 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5289 memcpy (TYPE_FIELDS (this_type
), fields
,
5290 sizeof (struct field
) * num_fields
);
5294 TYPE_UNSIGNED (this_type
) = 1;
5297 new_symbol (die
, this_type
, cu
);
5300 /* Extract all information from a DW_TAG_array_type DIE and put it in
5301 the DIE's type field. For now, this only handles one dimensional
5304 static struct type
*
5305 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5307 struct objfile
*objfile
= cu
->objfile
;
5308 struct die_info
*child_die
;
5309 struct type
*type
= NULL
;
5310 struct type
*element_type
, *range_type
, *index_type
;
5311 struct type
**range_types
= NULL
;
5312 struct attribute
*attr
;
5314 struct cleanup
*back_to
;
5317 element_type
= die_type (die
, cu
);
5319 /* Irix 6.2 native cc creates array types without children for
5320 arrays with unspecified length. */
5321 if (die
->child
== NULL
)
5323 index_type
= objfile_type (objfile
)->builtin_int
;
5324 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5325 type
= create_array_type (NULL
, element_type
, range_type
);
5326 return set_die_type (die
, type
, cu
);
5329 back_to
= make_cleanup (null_cleanup
, NULL
);
5330 child_die
= die
->child
;
5331 while (child_die
&& child_die
->tag
)
5333 if (child_die
->tag
== DW_TAG_subrange_type
)
5335 struct type
*child_type
= read_type_die (child_die
, cu
);
5336 if (child_type
!= NULL
)
5338 /* The range type was succesfully read. Save it for
5339 the array type creation. */
5340 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5342 range_types
= (struct type
**)
5343 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5344 * sizeof (struct type
*));
5346 make_cleanup (free_current_contents
, &range_types
);
5348 range_types
[ndim
++] = child_type
;
5351 child_die
= sibling_die (child_die
);
5354 /* Dwarf2 dimensions are output from left to right, create the
5355 necessary array types in backwards order. */
5357 type
= element_type
;
5359 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5363 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5368 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5371 /* Understand Dwarf2 support for vector types (like they occur on
5372 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5373 array type. This is not part of the Dwarf2/3 standard yet, but a
5374 custom vendor extension. The main difference between a regular
5375 array and the vector variant is that vectors are passed by value
5377 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5379 make_vector_type (type
);
5381 name
= dwarf2_name (die
, cu
);
5383 TYPE_NAME (type
) = name
;
5385 do_cleanups (back_to
);
5387 /* Install the type in the die. */
5388 return set_die_type (die
, type
, cu
);
5391 static enum dwarf_array_dim_ordering
5392 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5394 struct attribute
*attr
;
5396 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5398 if (attr
) return DW_SND (attr
);
5401 GNU F77 is a special case, as at 08/2004 array type info is the
5402 opposite order to the dwarf2 specification, but data is still
5403 laid out as per normal fortran.
5405 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5409 if (cu
->language
== language_fortran
5410 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5412 return DW_ORD_row_major
;
5415 switch (cu
->language_defn
->la_array_ordering
)
5417 case array_column_major
:
5418 return DW_ORD_col_major
;
5419 case array_row_major
:
5421 return DW_ORD_row_major
;
5425 /* Extract all information from a DW_TAG_set_type DIE and put it in
5426 the DIE's type field. */
5428 static struct type
*
5429 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5431 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5433 return set_die_type (die
, set_type
, cu
);
5436 /* First cut: install each common block member as a global variable. */
5439 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5441 struct die_info
*child_die
;
5442 struct attribute
*attr
;
5444 CORE_ADDR base
= (CORE_ADDR
) 0;
5446 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5449 /* Support the .debug_loc offsets */
5450 if (attr_form_is_block (attr
))
5452 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5454 else if (attr_form_is_section_offset (attr
))
5456 dwarf2_complex_location_expr_complaint ();
5460 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5461 "common block member");
5464 if (die
->child
!= NULL
)
5466 child_die
= die
->child
;
5467 while (child_die
&& child_die
->tag
)
5469 sym
= new_symbol (child_die
, NULL
, cu
);
5470 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5473 CORE_ADDR byte_offset
= 0;
5475 if (attr_form_is_section_offset (attr
))
5476 dwarf2_complex_location_expr_complaint ();
5477 else if (attr_form_is_constant (attr
))
5478 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5479 else if (attr_form_is_block (attr
))
5480 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5482 dwarf2_complex_location_expr_complaint ();
5484 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5485 add_symbol_to_list (sym
, &global_symbols
);
5487 child_die
= sibling_die (child_die
);
5492 /* Create a type for a C++ namespace. */
5494 static struct type
*
5495 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5497 struct objfile
*objfile
= cu
->objfile
;
5498 const char *previous_prefix
, *name
;
5502 /* For extensions, reuse the type of the original namespace. */
5503 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5505 struct die_info
*ext_die
;
5506 struct dwarf2_cu
*ext_cu
= cu
;
5507 ext_die
= dwarf2_extension (die
, &ext_cu
);
5508 type
= read_type_die (ext_die
, ext_cu
);
5509 return set_die_type (die
, type
, cu
);
5512 name
= namespace_name (die
, &is_anonymous
, cu
);
5514 /* Now build the name of the current namespace. */
5516 previous_prefix
= determine_prefix (die
, cu
);
5517 if (previous_prefix
[0] != '\0')
5518 name
= typename_concat (&objfile
->objfile_obstack
,
5519 previous_prefix
, name
, cu
);
5521 /* Create the type. */
5522 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5524 TYPE_NAME (type
) = (char *) name
;
5525 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5527 set_die_type (die
, type
, cu
);
5532 /* Read a C++ namespace. */
5535 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5537 struct objfile
*objfile
= cu
->objfile
;
5541 /* Add a symbol associated to this if we haven't seen the namespace
5542 before. Also, add a using directive if it's an anonymous
5545 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5549 type
= read_type_die (die
, cu
);
5550 new_symbol (die
, type
, cu
);
5552 name
= namespace_name (die
, &is_anonymous
, cu
);
5555 const char *previous_prefix
= determine_prefix (die
, cu
);
5556 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
));
5560 if (die
->child
!= NULL
)
5562 struct die_info
*child_die
= die
->child
;
5564 while (child_die
&& child_die
->tag
)
5566 process_die (child_die
, cu
);
5567 child_die
= sibling_die (child_die
);
5572 /* Read a Fortran module. */
5575 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5577 struct die_info
*child_die
= die
->child
;
5579 /* FIXME: Support the separate Fortran module namespaces. */
5581 while (child_die
&& child_die
->tag
)
5583 process_die (child_die
, cu
);
5584 child_die
= sibling_die (child_die
);
5588 /* Return the name of the namespace represented by DIE. Set
5589 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5593 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5595 struct die_info
*current_die
;
5596 const char *name
= NULL
;
5598 /* Loop through the extensions until we find a name. */
5600 for (current_die
= die
;
5601 current_die
!= NULL
;
5602 current_die
= dwarf2_extension (die
, &cu
))
5604 name
= dwarf2_name (current_die
, cu
);
5609 /* Is it an anonymous namespace? */
5611 *is_anonymous
= (name
== NULL
);
5613 name
= "(anonymous namespace)";
5618 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5619 the user defined type vector. */
5621 static struct type
*
5622 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5624 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5625 struct comp_unit_head
*cu_header
= &cu
->header
;
5627 struct attribute
*attr_byte_size
;
5628 struct attribute
*attr_address_class
;
5629 int byte_size
, addr_class
;
5631 type
= lookup_pointer_type (die_type (die
, cu
));
5633 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5635 byte_size
= DW_UNSND (attr_byte_size
);
5637 byte_size
= cu_header
->addr_size
;
5639 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5640 if (attr_address_class
)
5641 addr_class
= DW_UNSND (attr_address_class
);
5643 addr_class
= DW_ADDR_none
;
5645 /* If the pointer size or address class is different than the
5646 default, create a type variant marked as such and set the
5647 length accordingly. */
5648 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5650 if (gdbarch_address_class_type_flags_p (gdbarch
))
5654 type_flags
= gdbarch_address_class_type_flags
5655 (gdbarch
, byte_size
, addr_class
);
5656 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5658 type
= make_type_with_address_space (type
, type_flags
);
5660 else if (TYPE_LENGTH (type
) != byte_size
)
5662 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5665 /* Should we also complain about unhandled address classes? */
5669 TYPE_LENGTH (type
) = byte_size
;
5670 return set_die_type (die
, type
, cu
);
5673 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5674 the user defined type vector. */
5676 static struct type
*
5677 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5679 struct objfile
*objfile
= cu
->objfile
;
5681 struct type
*to_type
;
5682 struct type
*domain
;
5684 to_type
= die_type (die
, cu
);
5685 domain
= die_containing_type (die
, cu
);
5687 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5688 type
= lookup_methodptr_type (to_type
);
5690 type
= lookup_memberptr_type (to_type
, domain
);
5692 return set_die_type (die
, type
, cu
);
5695 /* Extract all information from a DW_TAG_reference_type DIE and add to
5696 the user defined type vector. */
5698 static struct type
*
5699 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5701 struct comp_unit_head
*cu_header
= &cu
->header
;
5703 struct attribute
*attr
;
5705 type
= lookup_reference_type (die_type (die
, cu
));
5706 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5709 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5713 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5715 return set_die_type (die
, type
, cu
);
5718 static struct type
*
5719 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5721 struct type
*base_type
, *cv_type
;
5723 base_type
= die_type (die
, cu
);
5724 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5725 return set_die_type (die
, cv_type
, cu
);
5728 static struct type
*
5729 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5731 struct type
*base_type
, *cv_type
;
5733 base_type
= die_type (die
, cu
);
5734 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5735 return set_die_type (die
, cv_type
, cu
);
5738 /* Extract all information from a DW_TAG_string_type DIE and add to
5739 the user defined type vector. It isn't really a user defined type,
5740 but it behaves like one, with other DIE's using an AT_user_def_type
5741 attribute to reference it. */
5743 static struct type
*
5744 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5746 struct objfile
*objfile
= cu
->objfile
;
5747 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5748 struct type
*type
, *range_type
, *index_type
, *char_type
;
5749 struct attribute
*attr
;
5750 unsigned int length
;
5752 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5755 length
= DW_UNSND (attr
);
5759 /* check for the DW_AT_byte_size attribute */
5760 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5763 length
= DW_UNSND (attr
);
5771 index_type
= objfile_type (objfile
)->builtin_int
;
5772 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5773 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5774 type
= create_string_type (NULL
, char_type
, range_type
);
5776 return set_die_type (die
, type
, cu
);
5779 /* Handle DIES due to C code like:
5783 int (*funcp)(int a, long l);
5787 ('funcp' generates a DW_TAG_subroutine_type DIE)
5790 static struct type
*
5791 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5793 struct type
*type
; /* Type that this function returns */
5794 struct type
*ftype
; /* Function that returns above type */
5795 struct attribute
*attr
;
5797 type
= die_type (die
, cu
);
5798 ftype
= lookup_function_type (type
);
5800 /* All functions in C++, Pascal and Java have prototypes. */
5801 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5802 if ((attr
&& (DW_UNSND (attr
) != 0))
5803 || cu
->language
== language_cplus
5804 || cu
->language
== language_java
5805 || cu
->language
== language_pascal
)
5806 TYPE_PROTOTYPED (ftype
) = 1;
5808 /* Store the calling convention in the type if it's available in
5809 the subroutine die. Otherwise set the calling convention to
5810 the default value DW_CC_normal. */
5811 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5812 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5814 if (die
->child
!= NULL
)
5816 struct die_info
*child_die
;
5820 /* Count the number of parameters.
5821 FIXME: GDB currently ignores vararg functions, but knows about
5822 vararg member functions. */
5823 child_die
= die
->child
;
5824 while (child_die
&& child_die
->tag
)
5826 if (child_die
->tag
== DW_TAG_formal_parameter
)
5828 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5829 TYPE_VARARGS (ftype
) = 1;
5830 child_die
= sibling_die (child_die
);
5833 /* Allocate storage for parameters and fill them in. */
5834 TYPE_NFIELDS (ftype
) = nparams
;
5835 TYPE_FIELDS (ftype
) = (struct field
*)
5836 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5838 child_die
= die
->child
;
5839 while (child_die
&& child_die
->tag
)
5841 if (child_die
->tag
== DW_TAG_formal_parameter
)
5843 /* Dwarf2 has no clean way to discern C++ static and non-static
5844 member functions. G++ helps GDB by marking the first
5845 parameter for non-static member functions (which is the
5846 this pointer) as artificial. We pass this information
5847 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5848 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5850 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5852 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5853 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
5856 child_die
= sibling_die (child_die
);
5860 return set_die_type (die
, ftype
, cu
);
5863 static struct type
*
5864 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
5866 struct objfile
*objfile
= cu
->objfile
;
5867 struct attribute
*attr
;
5868 const char *name
= NULL
;
5869 struct type
*this_type
;
5871 name
= dwarf2_full_name (die
, cu
);
5872 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
5873 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
5874 TYPE_NAME (this_type
) = (char *) name
;
5875 set_die_type (die
, this_type
, cu
);
5876 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
5880 /* Find a representation of a given base type and install
5881 it in the TYPE field of the die. */
5883 static struct type
*
5884 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5886 struct objfile
*objfile
= cu
->objfile
;
5888 struct attribute
*attr
;
5889 int encoding
= 0, size
= 0;
5891 enum type_code code
= TYPE_CODE_INT
;
5893 struct type
*target_type
= NULL
;
5895 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5898 encoding
= DW_UNSND (attr
);
5900 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5903 size
= DW_UNSND (attr
);
5905 name
= dwarf2_name (die
, cu
);
5908 complaint (&symfile_complaints
,
5909 _("DW_AT_name missing from DW_TAG_base_type"));
5914 case DW_ATE_address
:
5915 /* Turn DW_ATE_address into a void * pointer. */
5916 code
= TYPE_CODE_PTR
;
5917 type_flags
|= TYPE_FLAG_UNSIGNED
;
5918 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5920 case DW_ATE_boolean
:
5921 code
= TYPE_CODE_BOOL
;
5922 type_flags
|= TYPE_FLAG_UNSIGNED
;
5924 case DW_ATE_complex_float
:
5925 code
= TYPE_CODE_COMPLEX
;
5926 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
5928 case DW_ATE_decimal_float
:
5929 code
= TYPE_CODE_DECFLOAT
;
5932 code
= TYPE_CODE_FLT
;
5936 case DW_ATE_unsigned
:
5937 type_flags
|= TYPE_FLAG_UNSIGNED
;
5939 case DW_ATE_signed_char
:
5940 if (cu
->language
== language_ada
|| cu
->language
== language_m2
5941 || cu
->language
== language_pascal
)
5942 code
= TYPE_CODE_CHAR
;
5944 case DW_ATE_unsigned_char
:
5945 if (cu
->language
== language_ada
|| cu
->language
== language_m2
5946 || cu
->language
== language_pascal
)
5947 code
= TYPE_CODE_CHAR
;
5948 type_flags
|= TYPE_FLAG_UNSIGNED
;
5951 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
5952 dwarf_type_encoding_name (encoding
));
5956 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
5957 TYPE_NAME (type
) = name
;
5958 TYPE_TARGET_TYPE (type
) = target_type
;
5960 if (name
&& strcmp (name
, "char") == 0)
5961 TYPE_NOSIGN (type
) = 1;
5963 return set_die_type (die
, type
, cu
);
5966 /* Read the given DW_AT_subrange DIE. */
5968 static struct type
*
5969 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5971 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5972 struct type
*base_type
;
5973 struct type
*range_type
;
5974 struct attribute
*attr
;
5979 base_type
= die_type (die
, cu
);
5980 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
5982 complaint (&symfile_complaints
,
5983 _("DW_AT_type missing from DW_TAG_subrange_type"));
5985 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
5986 0, NULL
, cu
->objfile
);
5989 if (cu
->language
== language_fortran
)
5991 /* FORTRAN implies a lower bound of 1, if not given. */
5995 /* FIXME: For variable sized arrays either of these could be
5996 a variable rather than a constant value. We'll allow it,
5997 but we don't know how to handle it. */
5998 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6000 low
= dwarf2_get_attr_constant_value (attr
, 0);
6002 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6005 if (attr
->form
== DW_FORM_block1
)
6007 /* GCC encodes arrays with unspecified or dynamic length
6008 with a DW_FORM_block1 attribute.
6009 FIXME: GDB does not yet know how to handle dynamic
6010 arrays properly, treat them as arrays with unspecified
6013 FIXME: jimb/2003-09-22: GDB does not really know
6014 how to handle arrays of unspecified length
6015 either; we just represent them as zero-length
6016 arrays. Choose an appropriate upper bound given
6017 the lower bound we've computed above. */
6021 high
= dwarf2_get_attr_constant_value (attr
, 1);
6024 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6026 name
= dwarf2_name (die
, cu
);
6028 TYPE_NAME (range_type
) = name
;
6030 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6032 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6034 return set_die_type (die
, range_type
, cu
);
6037 static struct type
*
6038 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6042 /* For now, we only support the C meaning of an unspecified type: void. */
6044 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6045 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6047 return set_die_type (die
, type
, cu
);
6050 /* Trivial hash function for die_info: the hash value of a DIE
6051 is its offset in .debug_info for this objfile. */
6054 die_hash (const void *item
)
6056 const struct die_info
*die
= item
;
6060 /* Trivial comparison function for die_info structures: two DIEs
6061 are equal if they have the same offset. */
6064 die_eq (const void *item_lhs
, const void *item_rhs
)
6066 const struct die_info
*die_lhs
= item_lhs
;
6067 const struct die_info
*die_rhs
= item_rhs
;
6068 return die_lhs
->offset
== die_rhs
->offset
;
6071 /* Read a whole compilation unit into a linked list of dies. */
6073 static struct die_info
*
6074 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6076 struct die_reader_specs reader_specs
;
6078 gdb_assert (cu
->die_hash
== NULL
);
6080 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6084 &cu
->comp_unit_obstack
,
6085 hashtab_obstack_allocate
,
6086 dummy_obstack_deallocate
);
6088 init_cu_die_reader (&reader_specs
, cu
);
6090 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6093 /* Main entry point for reading a DIE and all children.
6094 Read the DIE and dump it if requested. */
6096 static struct die_info
*
6097 read_die_and_children (const struct die_reader_specs
*reader
,
6099 gdb_byte
**new_info_ptr
,
6100 struct die_info
*parent
)
6102 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6103 new_info_ptr
, parent
);
6105 if (dwarf2_die_debug
)
6107 fprintf_unfiltered (gdb_stdlog
,
6108 "\nRead die from %s of %s:\n",
6109 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6111 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6113 : "unknown section",
6114 reader
->abfd
->filename
);
6115 dump_die (result
, dwarf2_die_debug
);
6121 /* Read a single die and all its descendents. Set the die's sibling
6122 field to NULL; set other fields in the die correctly, and set all
6123 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6124 location of the info_ptr after reading all of those dies. PARENT
6125 is the parent of the die in question. */
6127 static struct die_info
*
6128 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6130 gdb_byte
**new_info_ptr
,
6131 struct die_info
*parent
)
6133 struct die_info
*die
;
6137 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6140 *new_info_ptr
= cur_ptr
;
6143 store_in_ref_table (die
, reader
->cu
);
6146 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6150 *new_info_ptr
= cur_ptr
;
6153 die
->sibling
= NULL
;
6154 die
->parent
= parent
;
6158 /* Read a die, all of its descendents, and all of its siblings; set
6159 all of the fields of all of the dies correctly. Arguments are as
6160 in read_die_and_children. */
6162 static struct die_info
*
6163 read_die_and_siblings (const struct die_reader_specs
*reader
,
6165 gdb_byte
**new_info_ptr
,
6166 struct die_info
*parent
)
6168 struct die_info
*first_die
, *last_sibling
;
6172 first_die
= last_sibling
= NULL
;
6176 struct die_info
*die
6177 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6181 *new_info_ptr
= cur_ptr
;
6188 last_sibling
->sibling
= die
;
6194 /* Read the die from the .debug_info section buffer. Set DIEP to
6195 point to a newly allocated die with its information, except for its
6196 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6197 whether the die has children or not. */
6200 read_full_die (const struct die_reader_specs
*reader
,
6201 struct die_info
**diep
, gdb_byte
*info_ptr
,
6204 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6205 struct abbrev_info
*abbrev
;
6206 struct die_info
*die
;
6207 struct dwarf2_cu
*cu
= reader
->cu
;
6208 bfd
*abfd
= reader
->abfd
;
6210 offset
= info_ptr
- reader
->buffer
;
6211 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6212 info_ptr
+= bytes_read
;
6220 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6222 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6224 bfd_get_filename (abfd
));
6226 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6227 die
->offset
= offset
;
6228 die
->tag
= abbrev
->tag
;
6229 die
->abbrev
= abbrev_number
;
6231 die
->num_attrs
= abbrev
->num_attrs
;
6233 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6234 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6235 abfd
, info_ptr
, cu
);
6238 *has_children
= abbrev
->has_children
;
6242 /* In DWARF version 2, the description of the debugging information is
6243 stored in a separate .debug_abbrev section. Before we read any
6244 dies from a section we read in all abbreviations and install them
6245 in a hash table. This function also sets flags in CU describing
6246 the data found in the abbrev table. */
6249 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6251 struct comp_unit_head
*cu_header
= &cu
->header
;
6252 gdb_byte
*abbrev_ptr
;
6253 struct abbrev_info
*cur_abbrev
;
6254 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6255 unsigned int abbrev_form
, hash_number
;
6256 struct attr_abbrev
*cur_attrs
;
6257 unsigned int allocated_attrs
;
6259 /* Initialize dwarf2 abbrevs */
6260 obstack_init (&cu
->abbrev_obstack
);
6261 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6263 * sizeof (struct abbrev_info
*)));
6264 memset (cu
->dwarf2_abbrevs
, 0,
6265 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6267 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6268 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6269 abbrev_ptr
+= bytes_read
;
6271 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6272 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6274 /* loop until we reach an abbrev number of 0 */
6275 while (abbrev_number
)
6277 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6279 /* read in abbrev header */
6280 cur_abbrev
->number
= abbrev_number
;
6281 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6282 abbrev_ptr
+= bytes_read
;
6283 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6286 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6287 cu
->has_namespace_info
= 1;
6289 /* now read in declarations */
6290 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6291 abbrev_ptr
+= bytes_read
;
6292 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6293 abbrev_ptr
+= bytes_read
;
6296 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6298 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6300 = xrealloc (cur_attrs
, (allocated_attrs
6301 * sizeof (struct attr_abbrev
)));
6304 /* Record whether this compilation unit might have
6305 inter-compilation-unit references. If we don't know what form
6306 this attribute will have, then it might potentially be a
6307 DW_FORM_ref_addr, so we conservatively expect inter-CU
6310 if (abbrev_form
== DW_FORM_ref_addr
6311 || abbrev_form
== DW_FORM_indirect
)
6312 cu
->has_form_ref_addr
= 1;
6314 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6315 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6316 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6317 abbrev_ptr
+= bytes_read
;
6318 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6319 abbrev_ptr
+= bytes_read
;
6322 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6323 (cur_abbrev
->num_attrs
6324 * sizeof (struct attr_abbrev
)));
6325 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6326 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6328 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6329 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6330 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6332 /* Get next abbreviation.
6333 Under Irix6 the abbreviations for a compilation unit are not
6334 always properly terminated with an abbrev number of 0.
6335 Exit loop if we encounter an abbreviation which we have
6336 already read (which means we are about to read the abbreviations
6337 for the next compile unit) or if the end of the abbreviation
6338 table is reached. */
6339 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6340 >= dwarf2_per_objfile
->abbrev
.size
)
6342 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6343 abbrev_ptr
+= bytes_read
;
6344 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6351 /* Release the memory used by the abbrev table for a compilation unit. */
6354 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6356 struct dwarf2_cu
*cu
= ptr_to_cu
;
6358 obstack_free (&cu
->abbrev_obstack
, NULL
);
6359 cu
->dwarf2_abbrevs
= NULL
;
6362 /* Lookup an abbrev_info structure in the abbrev hash table. */
6364 static struct abbrev_info
*
6365 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6367 unsigned int hash_number
;
6368 struct abbrev_info
*abbrev
;
6370 hash_number
= number
% ABBREV_HASH_SIZE
;
6371 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6375 if (abbrev
->number
== number
)
6378 abbrev
= abbrev
->next
;
6383 /* Returns nonzero if TAG represents a type that we might generate a partial
6387 is_type_tag_for_partial (int tag
)
6392 /* Some types that would be reasonable to generate partial symbols for,
6393 that we don't at present. */
6394 case DW_TAG_array_type
:
6395 case DW_TAG_file_type
:
6396 case DW_TAG_ptr_to_member_type
:
6397 case DW_TAG_set_type
:
6398 case DW_TAG_string_type
:
6399 case DW_TAG_subroutine_type
:
6401 case DW_TAG_base_type
:
6402 case DW_TAG_class_type
:
6403 case DW_TAG_interface_type
:
6404 case DW_TAG_enumeration_type
:
6405 case DW_TAG_structure_type
:
6406 case DW_TAG_subrange_type
:
6407 case DW_TAG_typedef
:
6408 case DW_TAG_union_type
:
6415 /* Load all DIEs that are interesting for partial symbols into memory. */
6417 static struct partial_die_info
*
6418 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6419 int building_psymtab
, struct dwarf2_cu
*cu
)
6421 struct partial_die_info
*part_die
;
6422 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6423 struct abbrev_info
*abbrev
;
6424 unsigned int bytes_read
;
6425 unsigned int load_all
= 0;
6427 int nesting_level
= 1;
6432 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6436 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6440 &cu
->comp_unit_obstack
,
6441 hashtab_obstack_allocate
,
6442 dummy_obstack_deallocate
);
6444 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6445 sizeof (struct partial_die_info
));
6449 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6451 /* A NULL abbrev means the end of a series of children. */
6454 if (--nesting_level
== 0)
6456 /* PART_DIE was probably the last thing allocated on the
6457 comp_unit_obstack, so we could call obstack_free
6458 here. We don't do that because the waste is small,
6459 and will be cleaned up when we're done with this
6460 compilation unit. This way, we're also more robust
6461 against other users of the comp_unit_obstack. */
6464 info_ptr
+= bytes_read
;
6465 last_die
= parent_die
;
6466 parent_die
= parent_die
->die_parent
;
6470 /* Check whether this DIE is interesting enough to save. Normally
6471 we would not be interested in members here, but there may be
6472 later variables referencing them via DW_AT_specification (for
6475 && !is_type_tag_for_partial (abbrev
->tag
)
6476 && abbrev
->tag
!= DW_TAG_enumerator
6477 && abbrev
->tag
!= DW_TAG_subprogram
6478 && abbrev
->tag
!= DW_TAG_lexical_block
6479 && abbrev
->tag
!= DW_TAG_variable
6480 && abbrev
->tag
!= DW_TAG_namespace
6481 && abbrev
->tag
!= DW_TAG_member
)
6483 /* Otherwise we skip to the next sibling, if any. */
6484 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6488 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6489 buffer
, info_ptr
, cu
);
6491 /* This two-pass algorithm for processing partial symbols has a
6492 high cost in cache pressure. Thus, handle some simple cases
6493 here which cover the majority of C partial symbols. DIEs
6494 which neither have specification tags in them, nor could have
6495 specification tags elsewhere pointing at them, can simply be
6496 processed and discarded.
6498 This segment is also optional; scan_partial_symbols and
6499 add_partial_symbol will handle these DIEs if we chain
6500 them in normally. When compilers which do not emit large
6501 quantities of duplicate debug information are more common,
6502 this code can probably be removed. */
6504 /* Any complete simple types at the top level (pretty much all
6505 of them, for a language without namespaces), can be processed
6507 if (parent_die
== NULL
6508 && part_die
->has_specification
== 0
6509 && part_die
->is_declaration
== 0
6510 && (part_die
->tag
== DW_TAG_typedef
6511 || part_die
->tag
== DW_TAG_base_type
6512 || part_die
->tag
== DW_TAG_subrange_type
))
6514 if (building_psymtab
&& part_die
->name
!= NULL
)
6515 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
6516 VAR_DOMAIN
, LOC_TYPEDEF
,
6517 &cu
->objfile
->static_psymbols
,
6518 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6519 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6523 /* If we're at the second level, and we're an enumerator, and
6524 our parent has no specification (meaning possibly lives in a
6525 namespace elsewhere), then we can add the partial symbol now
6526 instead of queueing it. */
6527 if (part_die
->tag
== DW_TAG_enumerator
6528 && parent_die
!= NULL
6529 && parent_die
->die_parent
== NULL
6530 && parent_die
->tag
== DW_TAG_enumeration_type
6531 && parent_die
->has_specification
== 0)
6533 if (part_die
->name
== NULL
)
6534 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6535 else if (building_psymtab
)
6536 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
6537 VAR_DOMAIN
, LOC_CONST
,
6538 (cu
->language
== language_cplus
6539 || cu
->language
== language_java
)
6540 ? &cu
->objfile
->global_psymbols
6541 : &cu
->objfile
->static_psymbols
,
6542 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6544 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6548 /* We'll save this DIE so link it in. */
6549 part_die
->die_parent
= parent_die
;
6550 part_die
->die_sibling
= NULL
;
6551 part_die
->die_child
= NULL
;
6553 if (last_die
&& last_die
== parent_die
)
6554 last_die
->die_child
= part_die
;
6556 last_die
->die_sibling
= part_die
;
6558 last_die
= part_die
;
6560 if (first_die
== NULL
)
6561 first_die
= part_die
;
6563 /* Maybe add the DIE to the hash table. Not all DIEs that we
6564 find interesting need to be in the hash table, because we
6565 also have the parent/sibling/child chains; only those that we
6566 might refer to by offset later during partial symbol reading.
6568 For now this means things that might have be the target of a
6569 DW_AT_specification, DW_AT_abstract_origin, or
6570 DW_AT_extension. DW_AT_extension will refer only to
6571 namespaces; DW_AT_abstract_origin refers to functions (and
6572 many things under the function DIE, but we do not recurse
6573 into function DIEs during partial symbol reading) and
6574 possibly variables as well; DW_AT_specification refers to
6575 declarations. Declarations ought to have the DW_AT_declaration
6576 flag. It happens that GCC forgets to put it in sometimes, but
6577 only for functions, not for types.
6579 Adding more things than necessary to the hash table is harmless
6580 except for the performance cost. Adding too few will result in
6581 wasted time in find_partial_die, when we reread the compilation
6582 unit with load_all_dies set. */
6585 || abbrev
->tag
== DW_TAG_subprogram
6586 || abbrev
->tag
== DW_TAG_variable
6587 || abbrev
->tag
== DW_TAG_namespace
6588 || part_die
->is_declaration
)
6592 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6593 part_die
->offset
, INSERT
);
6597 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6598 sizeof (struct partial_die_info
));
6600 /* For some DIEs we want to follow their children (if any). For C
6601 we have no reason to follow the children of structures; for other
6602 languages we have to, both so that we can get at method physnames
6603 to infer fully qualified class names, and for DW_AT_specification.
6605 For Ada, we need to scan the children of subprograms and lexical
6606 blocks as well because Ada allows the definition of nested
6607 entities that could be interesting for the debugger, such as
6608 nested subprograms for instance. */
6609 if (last_die
->has_children
6611 || last_die
->tag
== DW_TAG_namespace
6612 || last_die
->tag
== DW_TAG_enumeration_type
6613 || (cu
->language
!= language_c
6614 && (last_die
->tag
== DW_TAG_class_type
6615 || last_die
->tag
== DW_TAG_interface_type
6616 || last_die
->tag
== DW_TAG_structure_type
6617 || last_die
->tag
== DW_TAG_union_type
))
6618 || (cu
->language
== language_ada
6619 && (last_die
->tag
== DW_TAG_subprogram
6620 || last_die
->tag
== DW_TAG_lexical_block
))))
6623 parent_die
= last_die
;
6627 /* Otherwise we skip to the next sibling, if any. */
6628 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6630 /* Back to the top, do it again. */
6634 /* Read a minimal amount of information into the minimal die structure. */
6637 read_partial_die (struct partial_die_info
*part_die
,
6638 struct abbrev_info
*abbrev
,
6639 unsigned int abbrev_len
, bfd
*abfd
,
6640 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6641 struct dwarf2_cu
*cu
)
6643 unsigned int bytes_read
, i
;
6644 struct attribute attr
;
6645 int has_low_pc_attr
= 0;
6646 int has_high_pc_attr
= 0;
6648 memset (part_die
, 0, sizeof (struct partial_die_info
));
6650 part_die
->offset
= info_ptr
- buffer
;
6652 info_ptr
+= abbrev_len
;
6657 part_die
->tag
= abbrev
->tag
;
6658 part_die
->has_children
= abbrev
->has_children
;
6660 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6662 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6664 /* Store the data if it is of an attribute we want to keep in a
6665 partial symbol table. */
6669 switch (part_die
->tag
)
6671 case DW_TAG_compile_unit
:
6672 case DW_TAG_type_unit
:
6673 /* Compilation units have a DW_AT_name that is a filename, not
6674 a source language identifier. */
6675 case DW_TAG_enumeration_type
:
6676 case DW_TAG_enumerator
:
6677 /* These tags always have simple identifiers already; no need
6678 to canonicalize them. */
6679 part_die
->name
= DW_STRING (&attr
);
6683 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6684 &cu
->comp_unit_obstack
);
6688 case DW_AT_MIPS_linkage_name
:
6689 part_die
->name
= DW_STRING (&attr
);
6692 has_low_pc_attr
= 1;
6693 part_die
->lowpc
= DW_ADDR (&attr
);
6696 has_high_pc_attr
= 1;
6697 part_die
->highpc
= DW_ADDR (&attr
);
6699 case DW_AT_location
:
6700 /* Support the .debug_loc offsets */
6701 if (attr_form_is_block (&attr
))
6703 part_die
->locdesc
= DW_BLOCK (&attr
);
6705 else if (attr_form_is_section_offset (&attr
))
6707 dwarf2_complex_location_expr_complaint ();
6711 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6712 "partial symbol information");
6715 case DW_AT_external
:
6716 part_die
->is_external
= DW_UNSND (&attr
);
6718 case DW_AT_declaration
:
6719 part_die
->is_declaration
= DW_UNSND (&attr
);
6722 part_die
->has_type
= 1;
6724 case DW_AT_abstract_origin
:
6725 case DW_AT_specification
:
6726 case DW_AT_extension
:
6727 part_die
->has_specification
= 1;
6728 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6731 /* Ignore absolute siblings, they might point outside of
6732 the current compile unit. */
6733 if (attr
.form
== DW_FORM_ref_addr
)
6734 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6736 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6738 case DW_AT_byte_size
:
6739 part_die
->has_byte_size
= 1;
6741 case DW_AT_calling_convention
:
6742 /* DWARF doesn't provide a way to identify a program's source-level
6743 entry point. DW_AT_calling_convention attributes are only meant
6744 to describe functions' calling conventions.
6746 However, because it's a necessary piece of information in
6747 Fortran, and because DW_CC_program is the only piece of debugging
6748 information whose definition refers to a 'main program' at all,
6749 several compilers have begun marking Fortran main programs with
6750 DW_CC_program --- even when those functions use the standard
6751 calling conventions.
6753 So until DWARF specifies a way to provide this information and
6754 compilers pick up the new representation, we'll support this
6756 if (DW_UNSND (&attr
) == DW_CC_program
6757 && cu
->language
== language_fortran
)
6758 set_main_name (part_die
->name
);
6765 /* When using the GNU linker, .gnu.linkonce. sections are used to
6766 eliminate duplicate copies of functions and vtables and such.
6767 The linker will arbitrarily choose one and discard the others.
6768 The AT_*_pc values for such functions refer to local labels in
6769 these sections. If the section from that file was discarded, the
6770 labels are not in the output, so the relocs get a value of 0.
6771 If this is a discarded function, mark the pc bounds as invalid,
6772 so that GDB will ignore it. */
6773 if (has_low_pc_attr
&& has_high_pc_attr
6774 && part_die
->lowpc
< part_die
->highpc
6775 && (part_die
->lowpc
!= 0
6776 || dwarf2_per_objfile
->has_section_at_zero
))
6777 part_die
->has_pc_info
= 1;
6782 /* Find a cached partial DIE at OFFSET in CU. */
6784 static struct partial_die_info
*
6785 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6787 struct partial_die_info
*lookup_die
= NULL
;
6788 struct partial_die_info part_die
;
6790 part_die
.offset
= offset
;
6791 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6796 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6797 except in the case of .debug_types DIEs which do not reference
6798 outside their CU (they do however referencing other types via
6801 static struct partial_die_info
*
6802 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6804 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6805 struct partial_die_info
*pd
= NULL
;
6807 if (cu
->per_cu
->from_debug_types
)
6809 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6815 if (offset_in_cu_p (&cu
->header
, offset
))
6817 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6822 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6824 if (per_cu
->cu
== NULL
)
6826 load_partial_comp_unit (per_cu
, cu
->objfile
);
6827 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6828 dwarf2_per_objfile
->read_in_chain
= per_cu
;
6831 per_cu
->cu
->last_used
= 0;
6832 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6834 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
6836 struct cleanup
*back_to
;
6837 struct partial_die_info comp_unit_die
;
6838 struct abbrev_info
*abbrev
;
6839 unsigned int bytes_read
;
6842 per_cu
->load_all_dies
= 1;
6844 /* Re-read the DIEs. */
6845 back_to
= make_cleanup (null_cleanup
, 0);
6846 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6848 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6849 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6851 info_ptr
= (dwarf2_per_objfile
->info
.buffer
6852 + per_cu
->cu
->header
.offset
6853 + per_cu
->cu
->header
.first_die_offset
);
6854 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6855 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6856 per_cu
->cu
->objfile
->obfd
,
6857 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6859 if (comp_unit_die
.has_children
)
6860 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
6861 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6863 do_cleanups (back_to
);
6865 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6871 internal_error (__FILE__
, __LINE__
,
6872 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6873 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6877 /* Adjust PART_DIE before generating a symbol for it. This function
6878 may set the is_external flag or change the DIE's name. */
6881 fixup_partial_die (struct partial_die_info
*part_die
,
6882 struct dwarf2_cu
*cu
)
6884 /* If we found a reference attribute and the DIE has no name, try
6885 to find a name in the referred to DIE. */
6887 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6889 struct partial_die_info
*spec_die
;
6891 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6893 fixup_partial_die (spec_die
, cu
);
6897 part_die
->name
= spec_die
->name
;
6899 /* Copy DW_AT_external attribute if it is set. */
6900 if (spec_die
->is_external
)
6901 part_die
->is_external
= spec_die
->is_external
;
6905 /* Set default names for some unnamed DIEs. */
6906 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6907 || part_die
->tag
== DW_TAG_class_type
))
6908 part_die
->name
= "(anonymous class)";
6910 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6911 part_die
->name
= "(anonymous namespace)";
6913 if (part_die
->tag
== DW_TAG_structure_type
6914 || part_die
->tag
== DW_TAG_class_type
6915 || part_die
->tag
== DW_TAG_union_type
)
6916 guess_structure_name (part_die
, cu
);
6919 /* Read an attribute value described by an attribute form. */
6922 read_attribute_value (struct attribute
*attr
, unsigned form
,
6923 bfd
*abfd
, gdb_byte
*info_ptr
,
6924 struct dwarf2_cu
*cu
)
6926 struct comp_unit_head
*cu_header
= &cu
->header
;
6927 unsigned int bytes_read
;
6928 struct dwarf_block
*blk
;
6934 case DW_FORM_ref_addr
:
6935 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
6936 info_ptr
+= bytes_read
;
6938 case DW_FORM_block2
:
6939 blk
= dwarf_alloc_block (cu
);
6940 blk
->size
= read_2_bytes (abfd
, info_ptr
);
6942 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6943 info_ptr
+= blk
->size
;
6944 DW_BLOCK (attr
) = blk
;
6946 case DW_FORM_block4
:
6947 blk
= dwarf_alloc_block (cu
);
6948 blk
->size
= read_4_bytes (abfd
, info_ptr
);
6950 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6951 info_ptr
+= blk
->size
;
6952 DW_BLOCK (attr
) = blk
;
6955 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
6959 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
6963 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
6966 case DW_FORM_string
:
6967 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
6968 DW_STRING_IS_CANONICAL (attr
) = 0;
6969 info_ptr
+= bytes_read
;
6972 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
6974 DW_STRING_IS_CANONICAL (attr
) = 0;
6975 info_ptr
+= bytes_read
;
6978 blk
= dwarf_alloc_block (cu
);
6979 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6980 info_ptr
+= bytes_read
;
6981 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6982 info_ptr
+= blk
->size
;
6983 DW_BLOCK (attr
) = blk
;
6985 case DW_FORM_block1
:
6986 blk
= dwarf_alloc_block (cu
);
6987 blk
->size
= read_1_byte (abfd
, info_ptr
);
6989 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6990 info_ptr
+= blk
->size
;
6991 DW_BLOCK (attr
) = blk
;
6994 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6998 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7002 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7003 info_ptr
+= bytes_read
;
7006 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7007 info_ptr
+= bytes_read
;
7010 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7014 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7018 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7022 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7026 /* Convert the signature to something we can record in DW_UNSND
7028 NOTE: This is NULL if the type wasn't found. */
7029 DW_SIGNATURED_TYPE (attr
) =
7030 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7033 case DW_FORM_ref_udata
:
7034 DW_ADDR (attr
) = (cu
->header
.offset
7035 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7036 info_ptr
+= bytes_read
;
7038 case DW_FORM_indirect
:
7039 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7040 info_ptr
+= bytes_read
;
7041 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7044 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7045 dwarf_form_name (form
),
7046 bfd_get_filename (abfd
));
7049 /* We have seen instances where the compiler tried to emit a byte
7050 size attribute of -1 which ended up being encoded as an unsigned
7051 0xffffffff. Although 0xffffffff is technically a valid size value,
7052 an object of this size seems pretty unlikely so we can relatively
7053 safely treat these cases as if the size attribute was invalid and
7054 treat them as zero by default. */
7055 if (attr
->name
== DW_AT_byte_size
7056 && form
== DW_FORM_data4
7057 && DW_UNSND (attr
) >= 0xffffffff)
7060 (&symfile_complaints
,
7061 _("Suspicious DW_AT_byte_size value treated as zero instead of 0x%lx"),
7063 DW_UNSND (attr
) = 0;
7069 /* Read an attribute described by an abbreviated attribute. */
7072 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7073 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7075 attr
->name
= abbrev
->name
;
7076 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7079 /* read dwarf information from a buffer */
7082 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7084 return bfd_get_8 (abfd
, buf
);
7088 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7090 return bfd_get_signed_8 (abfd
, buf
);
7094 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7096 return bfd_get_16 (abfd
, buf
);
7100 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7102 return bfd_get_signed_16 (abfd
, buf
);
7106 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7108 return bfd_get_32 (abfd
, buf
);
7112 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7114 return bfd_get_signed_32 (abfd
, buf
);
7118 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7120 return bfd_get_64 (abfd
, buf
);
7124 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7125 unsigned int *bytes_read
)
7127 struct comp_unit_head
*cu_header
= &cu
->header
;
7128 CORE_ADDR retval
= 0;
7130 if (cu_header
->signed_addr_p
)
7132 switch (cu_header
->addr_size
)
7135 retval
= bfd_get_signed_16 (abfd
, buf
);
7138 retval
= bfd_get_signed_32 (abfd
, buf
);
7141 retval
= bfd_get_signed_64 (abfd
, buf
);
7144 internal_error (__FILE__
, __LINE__
,
7145 _("read_address: bad switch, signed [in module %s]"),
7146 bfd_get_filename (abfd
));
7151 switch (cu_header
->addr_size
)
7154 retval
= bfd_get_16 (abfd
, buf
);
7157 retval
= bfd_get_32 (abfd
, buf
);
7160 retval
= bfd_get_64 (abfd
, buf
);
7163 internal_error (__FILE__
, __LINE__
,
7164 _("read_address: bad switch, unsigned [in module %s]"),
7165 bfd_get_filename (abfd
));
7169 *bytes_read
= cu_header
->addr_size
;
7173 /* Read the initial length from a section. The (draft) DWARF 3
7174 specification allows the initial length to take up either 4 bytes
7175 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7176 bytes describe the length and all offsets will be 8 bytes in length
7179 An older, non-standard 64-bit format is also handled by this
7180 function. The older format in question stores the initial length
7181 as an 8-byte quantity without an escape value. Lengths greater
7182 than 2^32 aren't very common which means that the initial 4 bytes
7183 is almost always zero. Since a length value of zero doesn't make
7184 sense for the 32-bit format, this initial zero can be considered to
7185 be an escape value which indicates the presence of the older 64-bit
7186 format. As written, the code can't detect (old format) lengths
7187 greater than 4GB. If it becomes necessary to handle lengths
7188 somewhat larger than 4GB, we could allow other small values (such
7189 as the non-sensical values of 1, 2, and 3) to also be used as
7190 escape values indicating the presence of the old format.
7192 The value returned via bytes_read should be used to increment the
7193 relevant pointer after calling read_initial_length().
7195 [ Note: read_initial_length() and read_offset() are based on the
7196 document entitled "DWARF Debugging Information Format", revision
7197 3, draft 8, dated November 19, 2001. This document was obtained
7200 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7202 This document is only a draft and is subject to change. (So beware.)
7204 Details regarding the older, non-standard 64-bit format were
7205 determined empirically by examining 64-bit ELF files produced by
7206 the SGI toolchain on an IRIX 6.5 machine.
7208 - Kevin, July 16, 2002
7212 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7214 LONGEST length
= bfd_get_32 (abfd
, buf
);
7216 if (length
== 0xffffffff)
7218 length
= bfd_get_64 (abfd
, buf
+ 4);
7221 else if (length
== 0)
7223 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7224 length
= bfd_get_64 (abfd
, buf
);
7235 /* Cover function for read_initial_length.
7236 Returns the length of the object at BUF, and stores the size of the
7237 initial length in *BYTES_READ and stores the size that offsets will be in
7239 If the initial length size is not equivalent to that specified in
7240 CU_HEADER then issue a complaint.
7241 This is useful when reading non-comp-unit headers. */
7244 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7245 const struct comp_unit_head
*cu_header
,
7246 unsigned int *bytes_read
,
7247 unsigned int *offset_size
)
7249 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7251 gdb_assert (cu_header
->initial_length_size
== 4
7252 || cu_header
->initial_length_size
== 8
7253 || cu_header
->initial_length_size
== 12);
7255 if (cu_header
->initial_length_size
!= *bytes_read
)
7256 complaint (&symfile_complaints
,
7257 _("intermixed 32-bit and 64-bit DWARF sections"));
7259 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7263 /* Read an offset from the data stream. The size of the offset is
7264 given by cu_header->offset_size. */
7267 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7268 unsigned int *bytes_read
)
7270 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7271 *bytes_read
= cu_header
->offset_size
;
7275 /* Read an offset from the data stream. */
7278 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7282 switch (offset_size
)
7285 retval
= bfd_get_32 (abfd
, buf
);
7288 retval
= bfd_get_64 (abfd
, buf
);
7291 internal_error (__FILE__
, __LINE__
,
7292 _("read_offset_1: bad switch [in module %s]"),
7293 bfd_get_filename (abfd
));
7300 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7302 /* If the size of a host char is 8 bits, we can return a pointer
7303 to the buffer, otherwise we have to copy the data to a buffer
7304 allocated on the temporary obstack. */
7305 gdb_assert (HOST_CHAR_BIT
== 8);
7310 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7312 /* If the size of a host char is 8 bits, we can return a pointer
7313 to the string, otherwise we have to copy the string to a buffer
7314 allocated on the temporary obstack. */
7315 gdb_assert (HOST_CHAR_BIT
== 8);
7318 *bytes_read_ptr
= 1;
7321 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7322 return (char *) buf
;
7326 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7327 const struct comp_unit_head
*cu_header
,
7328 unsigned int *bytes_read_ptr
)
7330 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7332 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7334 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7335 bfd_get_filename (abfd
));
7338 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7340 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7341 bfd_get_filename (abfd
));
7344 gdb_assert (HOST_CHAR_BIT
== 8);
7345 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7347 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7350 static unsigned long
7351 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7353 unsigned long result
;
7354 unsigned int num_read
;
7364 byte
= bfd_get_8 (abfd
, buf
);
7367 result
|= ((unsigned long)(byte
& 127) << shift
);
7368 if ((byte
& 128) == 0)
7374 *bytes_read_ptr
= num_read
;
7379 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7382 int i
, shift
, num_read
;
7391 byte
= bfd_get_8 (abfd
, buf
);
7394 result
|= ((long)(byte
& 127) << shift
);
7396 if ((byte
& 128) == 0)
7401 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7402 result
|= -(((long)1) << shift
);
7403 *bytes_read_ptr
= num_read
;
7407 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7410 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7416 byte
= bfd_get_8 (abfd
, buf
);
7418 if ((byte
& 128) == 0)
7424 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7431 cu
->language
= language_c
;
7433 case DW_LANG_C_plus_plus
:
7434 cu
->language
= language_cplus
;
7436 case DW_LANG_Fortran77
:
7437 case DW_LANG_Fortran90
:
7438 case DW_LANG_Fortran95
:
7439 cu
->language
= language_fortran
;
7441 case DW_LANG_Mips_Assembler
:
7442 cu
->language
= language_asm
;
7445 cu
->language
= language_java
;
7449 cu
->language
= language_ada
;
7451 case DW_LANG_Modula2
:
7452 cu
->language
= language_m2
;
7454 case DW_LANG_Pascal83
:
7455 cu
->language
= language_pascal
;
7458 cu
->language
= language_objc
;
7460 case DW_LANG_Cobol74
:
7461 case DW_LANG_Cobol85
:
7463 cu
->language
= language_minimal
;
7466 cu
->language_defn
= language_def (cu
->language
);
7469 /* Return the named attribute or NULL if not there. */
7471 static struct attribute
*
7472 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7475 struct attribute
*spec
= NULL
;
7477 for (i
= 0; i
< die
->num_attrs
; ++i
)
7479 if (die
->attrs
[i
].name
== name
)
7480 return &die
->attrs
[i
];
7481 if (die
->attrs
[i
].name
== DW_AT_specification
7482 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7483 spec
= &die
->attrs
[i
];
7488 die
= follow_die_ref (die
, spec
, &cu
);
7489 return dwarf2_attr (die
, name
, cu
);
7495 /* Return the named attribute or NULL if not there,
7496 but do not follow DW_AT_specification, etc.
7497 This is for use in contexts where we're reading .debug_types dies.
7498 Following DW_AT_specification, DW_AT_abstract_origin will take us
7499 back up the chain, and we want to go down. */
7501 static struct attribute
*
7502 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7503 struct dwarf2_cu
*cu
)
7507 for (i
= 0; i
< die
->num_attrs
; ++i
)
7508 if (die
->attrs
[i
].name
== name
)
7509 return &die
->attrs
[i
];
7514 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7515 and holds a non-zero value. This function should only be used for
7516 DW_FORM_flag attributes. */
7519 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7521 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7523 return (attr
&& DW_UNSND (attr
));
7527 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7529 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7530 which value is non-zero. However, we have to be careful with
7531 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7532 (via dwarf2_flag_true_p) follows this attribute. So we may
7533 end up accidently finding a declaration attribute that belongs
7534 to a different DIE referenced by the specification attribute,
7535 even though the given DIE does not have a declaration attribute. */
7536 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7537 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7540 /* Return the die giving the specification for DIE, if there is
7541 one. *SPEC_CU is the CU containing DIE on input, and the CU
7542 containing the return value on output. If there is no
7543 specification, but there is an abstract origin, that is
7546 static struct die_info
*
7547 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7549 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7552 if (spec_attr
== NULL
)
7553 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7555 if (spec_attr
== NULL
)
7558 return follow_die_ref (die
, spec_attr
, spec_cu
);
7561 /* Free the line_header structure *LH, and any arrays and strings it
7564 free_line_header (struct line_header
*lh
)
7566 if (lh
->standard_opcode_lengths
)
7567 xfree (lh
->standard_opcode_lengths
);
7569 /* Remember that all the lh->file_names[i].name pointers are
7570 pointers into debug_line_buffer, and don't need to be freed. */
7572 xfree (lh
->file_names
);
7574 /* Similarly for the include directory names. */
7575 if (lh
->include_dirs
)
7576 xfree (lh
->include_dirs
);
7582 /* Add an entry to LH's include directory table. */
7584 add_include_dir (struct line_header
*lh
, char *include_dir
)
7586 /* Grow the array if necessary. */
7587 if (lh
->include_dirs_size
== 0)
7589 lh
->include_dirs_size
= 1; /* for testing */
7590 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7591 * sizeof (*lh
->include_dirs
));
7593 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7595 lh
->include_dirs_size
*= 2;
7596 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7597 (lh
->include_dirs_size
7598 * sizeof (*lh
->include_dirs
)));
7601 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7605 /* Add an entry to LH's file name table. */
7607 add_file_name (struct line_header
*lh
,
7609 unsigned int dir_index
,
7610 unsigned int mod_time
,
7611 unsigned int length
)
7613 struct file_entry
*fe
;
7615 /* Grow the array if necessary. */
7616 if (lh
->file_names_size
== 0)
7618 lh
->file_names_size
= 1; /* for testing */
7619 lh
->file_names
= xmalloc (lh
->file_names_size
7620 * sizeof (*lh
->file_names
));
7622 else if (lh
->num_file_names
>= lh
->file_names_size
)
7624 lh
->file_names_size
*= 2;
7625 lh
->file_names
= xrealloc (lh
->file_names
,
7626 (lh
->file_names_size
7627 * sizeof (*lh
->file_names
)));
7630 fe
= &lh
->file_names
[lh
->num_file_names
++];
7632 fe
->dir_index
= dir_index
;
7633 fe
->mod_time
= mod_time
;
7634 fe
->length
= length
;
7640 /* Read the statement program header starting at OFFSET in
7641 .debug_line, according to the endianness of ABFD. Return a pointer
7642 to a struct line_header, allocated using xmalloc.
7644 NOTE: the strings in the include directory and file name tables of
7645 the returned object point into debug_line_buffer, and must not be
7647 static struct line_header
*
7648 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7649 struct dwarf2_cu
*cu
)
7651 struct cleanup
*back_to
;
7652 struct line_header
*lh
;
7654 unsigned int bytes_read
, offset_size
;
7656 char *cur_dir
, *cur_file
;
7658 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7660 complaint (&symfile_complaints
, _("missing .debug_line section"));
7664 /* Make sure that at least there's room for the total_length field.
7665 That could be 12 bytes long, but we're just going to fudge that. */
7666 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7668 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7672 lh
= xmalloc (sizeof (*lh
));
7673 memset (lh
, 0, sizeof (*lh
));
7674 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7677 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7679 /* Read in the header. */
7681 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7682 &bytes_read
, &offset_size
);
7683 line_ptr
+= bytes_read
;
7684 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7685 + dwarf2_per_objfile
->line
.size
))
7687 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7690 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7691 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7693 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7694 line_ptr
+= offset_size
;
7695 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7697 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7699 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7701 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7703 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7705 lh
->standard_opcode_lengths
7706 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7708 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7709 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7711 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7715 /* Read directory table. */
7716 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7718 line_ptr
+= bytes_read
;
7719 add_include_dir (lh
, cur_dir
);
7721 line_ptr
+= bytes_read
;
7723 /* Read file name table. */
7724 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7726 unsigned int dir_index
, mod_time
, length
;
7728 line_ptr
+= bytes_read
;
7729 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7730 line_ptr
+= bytes_read
;
7731 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7732 line_ptr
+= bytes_read
;
7733 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7734 line_ptr
+= bytes_read
;
7736 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7738 line_ptr
+= bytes_read
;
7739 lh
->statement_program_start
= line_ptr
;
7741 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7742 + dwarf2_per_objfile
->line
.size
))
7743 complaint (&symfile_complaints
,
7744 _("line number info header doesn't fit in `.debug_line' section"));
7746 discard_cleanups (back_to
);
7750 /* This function exists to work around a bug in certain compilers
7751 (particularly GCC 2.95), in which the first line number marker of a
7752 function does not show up until after the prologue, right before
7753 the second line number marker. This function shifts ADDRESS down
7754 to the beginning of the function if necessary, and is called on
7755 addresses passed to record_line. */
7758 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7760 struct function_range
*fn
;
7762 /* Find the function_range containing address. */
7767 cu
->cached_fn
= cu
->first_fn
;
7771 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7777 while (fn
&& fn
!= cu
->cached_fn
)
7778 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7788 if (address
!= fn
->lowpc
)
7789 complaint (&symfile_complaints
,
7790 _("misplaced first line number at 0x%lx for '%s'"),
7791 (unsigned long) address
, fn
->name
);
7796 /* Decode the Line Number Program (LNP) for the given line_header
7797 structure and CU. The actual information extracted and the type
7798 of structures created from the LNP depends on the value of PST.
7800 1. If PST is NULL, then this procedure uses the data from the program
7801 to create all necessary symbol tables, and their linetables.
7802 The compilation directory of the file is passed in COMP_DIR,
7803 and must not be NULL.
7805 2. If PST is not NULL, this procedure reads the program to determine
7806 the list of files included by the unit represented by PST, and
7807 builds all the associated partial symbol tables. In this case,
7808 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7809 is not used to compute the full name of the symtab, and therefore
7810 omitting it when building the partial symtab does not introduce
7811 the potential for inconsistency - a partial symtab and its associated
7812 symbtab having a different fullname -). */
7815 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
7816 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
7818 gdb_byte
*line_ptr
, *extended_end
;
7820 unsigned int bytes_read
, extended_len
;
7821 unsigned char op_code
, extended_op
, adj_opcode
;
7823 struct objfile
*objfile
= cu
->objfile
;
7824 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7825 const int decode_for_pst_p
= (pst
!= NULL
);
7826 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
7828 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7830 line_ptr
= lh
->statement_program_start
;
7831 line_end
= lh
->statement_program_end
;
7833 /* Read the statement sequences until there's nothing left. */
7834 while (line_ptr
< line_end
)
7836 /* state machine registers */
7837 CORE_ADDR address
= 0;
7838 unsigned int file
= 1;
7839 unsigned int line
= 1;
7840 unsigned int column
= 0;
7841 int is_stmt
= lh
->default_is_stmt
;
7842 int basic_block
= 0;
7843 int end_sequence
= 0;
7846 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7848 /* Start a subfile for the current file of the state machine. */
7849 /* lh->include_dirs and lh->file_names are 0-based, but the
7850 directory and file name numbers in the statement program
7852 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7856 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7858 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7861 /* Decode the table. */
7862 while (!end_sequence
)
7864 op_code
= read_1_byte (abfd
, line_ptr
);
7866 if (line_ptr
> line_end
)
7868 dwarf2_debug_line_missing_end_sequence_complaint ();
7872 if (op_code
>= lh
->opcode_base
)
7874 /* Special operand. */
7875 adj_opcode
= op_code
- lh
->opcode_base
;
7876 address
+= (adj_opcode
/ lh
->line_range
)
7877 * lh
->minimum_instruction_length
;
7878 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7879 if (lh
->num_file_names
< file
|| file
== 0)
7880 dwarf2_debug_line_missing_file_complaint ();
7883 lh
->file_names
[file
- 1].included_p
= 1;
7884 if (!decode_for_pst_p
&& is_stmt
)
7886 if (last_subfile
!= current_subfile
)
7888 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7890 record_line (last_subfile
, 0, addr
);
7891 last_subfile
= current_subfile
;
7893 /* Append row to matrix using current values. */
7894 addr
= check_cu_functions (address
, cu
);
7895 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7896 record_line (current_subfile
, line
, addr
);
7901 else switch (op_code
)
7903 case DW_LNS_extended_op
:
7904 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7905 line_ptr
+= bytes_read
;
7906 extended_end
= line_ptr
+ extended_len
;
7907 extended_op
= read_1_byte (abfd
, line_ptr
);
7909 switch (extended_op
)
7911 case DW_LNE_end_sequence
:
7914 case DW_LNE_set_address
:
7915 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7916 line_ptr
+= bytes_read
;
7917 address
+= baseaddr
;
7919 case DW_LNE_define_file
:
7922 unsigned int dir_index
, mod_time
, length
;
7924 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
7925 line_ptr
+= bytes_read
;
7927 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7928 line_ptr
+= bytes_read
;
7930 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7931 line_ptr
+= bytes_read
;
7933 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7934 line_ptr
+= bytes_read
;
7935 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7938 case DW_LNE_set_discriminator
:
7939 /* The discriminator is not interesting to the debugger;
7941 line_ptr
= extended_end
;
7944 complaint (&symfile_complaints
,
7945 _("mangled .debug_line section"));
7948 /* Make sure that we parsed the extended op correctly. If e.g.
7949 we expected a different address size than the producer used,
7950 we may have read the wrong number of bytes. */
7951 if (line_ptr
!= extended_end
)
7953 complaint (&symfile_complaints
,
7954 _("mangled .debug_line section"));
7959 if (lh
->num_file_names
< file
|| file
== 0)
7960 dwarf2_debug_line_missing_file_complaint ();
7963 lh
->file_names
[file
- 1].included_p
= 1;
7964 if (!decode_for_pst_p
&& is_stmt
)
7966 if (last_subfile
!= current_subfile
)
7968 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7970 record_line (last_subfile
, 0, addr
);
7971 last_subfile
= current_subfile
;
7973 addr
= check_cu_functions (address
, cu
);
7974 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7975 record_line (current_subfile
, line
, addr
);
7980 case DW_LNS_advance_pc
:
7981 address
+= lh
->minimum_instruction_length
7982 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7983 line_ptr
+= bytes_read
;
7985 case DW_LNS_advance_line
:
7986 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
7987 line_ptr
+= bytes_read
;
7989 case DW_LNS_set_file
:
7991 /* The arrays lh->include_dirs and lh->file_names are
7992 0-based, but the directory and file name numbers in
7993 the statement program are 1-based. */
7994 struct file_entry
*fe
;
7997 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7998 line_ptr
+= bytes_read
;
7999 if (lh
->num_file_names
< file
|| file
== 0)
8000 dwarf2_debug_line_missing_file_complaint ();
8003 fe
= &lh
->file_names
[file
- 1];
8005 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8006 if (!decode_for_pst_p
)
8008 last_subfile
= current_subfile
;
8009 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8014 case DW_LNS_set_column
:
8015 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8016 line_ptr
+= bytes_read
;
8018 case DW_LNS_negate_stmt
:
8019 is_stmt
= (!is_stmt
);
8021 case DW_LNS_set_basic_block
:
8024 /* Add to the address register of the state machine the
8025 address increment value corresponding to special opcode
8026 255. I.e., this value is scaled by the minimum
8027 instruction length since special opcode 255 would have
8028 scaled the the increment. */
8029 case DW_LNS_const_add_pc
:
8030 address
+= (lh
->minimum_instruction_length
8031 * ((255 - lh
->opcode_base
) / lh
->line_range
));
8033 case DW_LNS_fixed_advance_pc
:
8034 address
+= read_2_bytes (abfd
, line_ptr
);
8039 /* Unknown standard opcode, ignore it. */
8042 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8044 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8045 line_ptr
+= bytes_read
;
8050 if (lh
->num_file_names
< file
|| file
== 0)
8051 dwarf2_debug_line_missing_file_complaint ();
8054 lh
->file_names
[file
- 1].included_p
= 1;
8055 if (!decode_for_pst_p
)
8057 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8058 record_line (current_subfile
, 0, addr
);
8063 if (decode_for_pst_p
)
8067 /* Now that we're done scanning the Line Header Program, we can
8068 create the psymtab of each included file. */
8069 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8070 if (lh
->file_names
[file_index
].included_p
== 1)
8072 const struct file_entry fe
= lh
->file_names
[file_index
];
8073 char *include_name
= fe
.name
;
8074 char *dir_name
= NULL
;
8075 char *pst_filename
= pst
->filename
;
8078 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8080 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8082 include_name
= concat (dir_name
, SLASH_STRING
,
8083 include_name
, (char *)NULL
);
8084 make_cleanup (xfree
, include_name
);
8087 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8089 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8090 pst_filename
, (char *)NULL
);
8091 make_cleanup (xfree
, pst_filename
);
8094 if (strcmp (include_name
, pst_filename
) != 0)
8095 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8100 /* Make sure a symtab is created for every file, even files
8101 which contain only variables (i.e. no code with associated
8105 struct file_entry
*fe
;
8107 for (i
= 0; i
< lh
->num_file_names
; i
++)
8110 fe
= &lh
->file_names
[i
];
8112 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8113 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8115 /* Skip the main file; we don't need it, and it must be
8116 allocated last, so that it will show up before the
8117 non-primary symtabs in the objfile's symtab list. */
8118 if (current_subfile
== first_subfile
)
8121 if (current_subfile
->symtab
== NULL
)
8122 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8124 fe
->symtab
= current_subfile
->symtab
;
8129 /* Start a subfile for DWARF. FILENAME is the name of the file and
8130 DIRNAME the name of the source directory which contains FILENAME
8131 or NULL if not known. COMP_DIR is the compilation directory for the
8132 linetable's compilation unit or NULL if not known.
8133 This routine tries to keep line numbers from identical absolute and
8134 relative file names in a common subfile.
8136 Using the `list' example from the GDB testsuite, which resides in
8137 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8138 of /srcdir/list0.c yields the following debugging information for list0.c:
8140 DW_AT_name: /srcdir/list0.c
8141 DW_AT_comp_dir: /compdir
8142 files.files[0].name: list0.h
8143 files.files[0].dir: /srcdir
8144 files.files[1].name: list0.c
8145 files.files[1].dir: /srcdir
8147 The line number information for list0.c has to end up in a single
8148 subfile, so that `break /srcdir/list0.c:1' works as expected.
8149 start_subfile will ensure that this happens provided that we pass the
8150 concatenation of files.files[1].dir and files.files[1].name as the
8154 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8158 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8159 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8160 second argument to start_subfile. To be consistent, we do the
8161 same here. In order not to lose the line information directory,
8162 we concatenate it to the filename when it makes sense.
8163 Note that the Dwarf3 standard says (speaking of filenames in line
8164 information): ``The directory index is ignored for file names
8165 that represent full path names''. Thus ignoring dirname in the
8166 `else' branch below isn't an issue. */
8168 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8169 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8171 fullname
= filename
;
8173 start_subfile (fullname
, comp_dir
);
8175 if (fullname
!= filename
)
8180 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8181 struct dwarf2_cu
*cu
)
8183 struct objfile
*objfile
= cu
->objfile
;
8184 struct comp_unit_head
*cu_header
= &cu
->header
;
8186 /* NOTE drow/2003-01-30: There used to be a comment and some special
8187 code here to turn a symbol with DW_AT_external and a
8188 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8189 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8190 with some versions of binutils) where shared libraries could have
8191 relocations against symbols in their debug information - the
8192 minimal symbol would have the right address, but the debug info
8193 would not. It's no longer necessary, because we will explicitly
8194 apply relocations when we read in the debug information now. */
8196 /* A DW_AT_location attribute with no contents indicates that a
8197 variable has been optimized away. */
8198 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8200 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8204 /* Handle one degenerate form of location expression specially, to
8205 preserve GDB's previous behavior when section offsets are
8206 specified. If this is just a DW_OP_addr then mark this symbol
8209 if (attr_form_is_block (attr
)
8210 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8211 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8215 SYMBOL_VALUE_ADDRESS (sym
) =
8216 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8217 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8218 fixup_symbol_section (sym
, objfile
);
8219 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8220 SYMBOL_SECTION (sym
));
8224 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8225 expression evaluator, and use LOC_COMPUTED only when necessary
8226 (i.e. when the value of a register or memory location is
8227 referenced, or a thread-local block, etc.). Then again, it might
8228 not be worthwhile. I'm assuming that it isn't unless performance
8229 or memory numbers show me otherwise. */
8231 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8232 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8235 /* Given a pointer to a DWARF information entry, figure out if we need
8236 to make a symbol table entry for it, and if so, create a new entry
8237 and return a pointer to it.
8238 If TYPE is NULL, determine symbol type from the die, otherwise
8239 used the passed type. */
8241 static struct symbol
*
8242 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8244 struct objfile
*objfile
= cu
->objfile
;
8245 struct symbol
*sym
= NULL
;
8247 struct attribute
*attr
= NULL
;
8248 struct attribute
*attr2
= NULL
;
8250 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8252 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8254 if (die
->tag
!= DW_TAG_namespace
)
8255 name
= dwarf2_linkage_name (die
, cu
);
8257 name
= TYPE_NAME (type
);
8261 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8262 sizeof (struct symbol
));
8263 OBJSTAT (objfile
, n_syms
++);
8264 memset (sym
, 0, sizeof (struct symbol
));
8266 /* Cache this symbol's name and the name's demangled form (if any). */
8267 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8268 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
8270 /* Default assumptions.
8271 Use the passed type or decode it from the die. */
8272 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8273 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8275 SYMBOL_TYPE (sym
) = type
;
8277 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8278 attr
= dwarf2_attr (die
,
8279 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8283 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8286 attr
= dwarf2_attr (die
,
8287 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8291 int file_index
= DW_UNSND (attr
);
8292 if (cu
->line_header
== NULL
8293 || file_index
> cu
->line_header
->num_file_names
)
8294 complaint (&symfile_complaints
,
8295 _("file index out of range"));
8296 else if (file_index
> 0)
8298 struct file_entry
*fe
;
8299 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8300 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8307 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8310 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8312 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8314 case DW_TAG_subprogram
:
8315 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8317 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8318 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8319 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8320 || cu
->language
== language_ada
)
8322 /* Subprograms marked external are stored as a global symbol.
8323 Ada subprograms, whether marked external or not, are always
8324 stored as a global symbol, because we want to be able to
8325 access them globally. For instance, we want to be able
8326 to break on a nested subprogram without having to
8327 specify the context. */
8328 add_symbol_to_list (sym
, &global_symbols
);
8332 add_symbol_to_list (sym
, cu
->list_in_scope
);
8335 case DW_TAG_inlined_subroutine
:
8336 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8338 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8339 SYMBOL_INLINED (sym
) = 1;
8340 /* Do not add the symbol to any lists. It will be found via
8341 BLOCK_FUNCTION from the blockvector. */
8343 case DW_TAG_variable
:
8344 /* Compilation with minimal debug info may result in variables
8345 with missing type entries. Change the misleading `void' type
8346 to something sensible. */
8347 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8349 = objfile_type (objfile
)->nodebug_data_symbol
;
8351 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8354 dwarf2_const_value (attr
, sym
, cu
);
8355 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8356 if (attr2
&& (DW_UNSND (attr2
) != 0))
8357 add_symbol_to_list (sym
, &global_symbols
);
8359 add_symbol_to_list (sym
, cu
->list_in_scope
);
8362 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8365 var_decode_location (attr
, sym
, cu
);
8366 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8367 if (attr2
&& (DW_UNSND (attr2
) != 0))
8368 add_symbol_to_list (sym
, &global_symbols
);
8370 add_symbol_to_list (sym
, cu
->list_in_scope
);
8374 /* We do not know the address of this symbol.
8375 If it is an external symbol and we have type information
8376 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8377 The address of the variable will then be determined from
8378 the minimal symbol table whenever the variable is
8380 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8381 if (attr2
&& (DW_UNSND (attr2
) != 0)
8382 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8384 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8385 add_symbol_to_list (sym
, cu
->list_in_scope
);
8387 else if (!die_is_declaration (die
, cu
))
8389 /* Use the default LOC_OPTIMIZED_OUT class. */
8390 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8391 add_symbol_to_list (sym
, cu
->list_in_scope
);
8395 case DW_TAG_formal_parameter
:
8396 /* If we are inside a function, mark this as an argument. If
8397 not, we might be looking at an argument to an inlined function
8398 when we do not have enough information to show inlined frames;
8399 pretend it's a local variable in that case so that the user can
8401 if (context_stack_depth
> 0
8402 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8403 SYMBOL_IS_ARGUMENT (sym
) = 1;
8404 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8407 var_decode_location (attr
, sym
, cu
);
8409 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8412 dwarf2_const_value (attr
, sym
, cu
);
8414 add_symbol_to_list (sym
, cu
->list_in_scope
);
8416 case DW_TAG_unspecified_parameters
:
8417 /* From varargs functions; gdb doesn't seem to have any
8418 interest in this information, so just ignore it for now.
8421 case DW_TAG_class_type
:
8422 case DW_TAG_interface_type
:
8423 case DW_TAG_structure_type
:
8424 case DW_TAG_union_type
:
8425 case DW_TAG_set_type
:
8426 case DW_TAG_enumeration_type
:
8427 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8428 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8430 /* Make sure that the symbol includes appropriate enclosing
8431 classes/namespaces in its name. These are calculated in
8432 read_structure_type, and the correct name is saved in
8435 if (cu
->language
== language_cplus
8436 || cu
->language
== language_java
)
8438 struct type
*type
= SYMBOL_TYPE (sym
);
8440 if (TYPE_TAG_NAME (type
) != NULL
)
8442 /* FIXME: carlton/2003-11-10: Should this use
8443 SYMBOL_SET_NAMES instead? (The same problem also
8444 arises further down in this function.) */
8445 /* The type's name is already allocated along with
8446 this objfile, so we don't need to duplicate it
8448 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8453 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8454 really ever be static objects: otherwise, if you try
8455 to, say, break of a class's method and you're in a file
8456 which doesn't mention that class, it won't work unless
8457 the check for all static symbols in lookup_symbol_aux
8458 saves you. See the OtherFileClass tests in
8459 gdb.c++/namespace.exp. */
8461 struct pending
**list_to_add
;
8463 list_to_add
= (cu
->list_in_scope
== &file_symbols
8464 && (cu
->language
== language_cplus
8465 || cu
->language
== language_java
)
8466 ? &global_symbols
: cu
->list_in_scope
);
8468 add_symbol_to_list (sym
, list_to_add
);
8470 /* The semantics of C++ state that "struct foo { ... }" also
8471 defines a typedef for "foo". A Java class declaration also
8472 defines a typedef for the class. */
8473 if (cu
->language
== language_cplus
8474 || cu
->language
== language_java
8475 || cu
->language
== language_ada
)
8477 /* The symbol's name is already allocated along with
8478 this objfile, so we don't need to duplicate it for
8480 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8481 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8485 case DW_TAG_typedef
:
8486 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8487 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8488 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8489 add_symbol_to_list (sym
, cu
->list_in_scope
);
8491 case DW_TAG_base_type
:
8492 case DW_TAG_subrange_type
:
8493 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8494 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8495 add_symbol_to_list (sym
, cu
->list_in_scope
);
8497 case DW_TAG_enumerator
:
8498 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8499 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8502 dwarf2_const_value (attr
, sym
, cu
);
8505 /* NOTE: carlton/2003-11-10: See comment above in the
8506 DW_TAG_class_type, etc. block. */
8508 struct pending
**list_to_add
;
8510 list_to_add
= (cu
->list_in_scope
== &file_symbols
8511 && (cu
->language
== language_cplus
8512 || cu
->language
== language_java
)
8513 ? &global_symbols
: cu
->list_in_scope
);
8515 add_symbol_to_list (sym
, list_to_add
);
8518 case DW_TAG_namespace
:
8519 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8520 add_symbol_to_list (sym
, &global_symbols
);
8523 /* Not a tag we recognize. Hopefully we aren't processing
8524 trash data, but since we must specifically ignore things
8525 we don't recognize, there is nothing else we should do at
8527 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8528 dwarf_tag_name (die
->tag
));
8532 /* For the benefit of old versions of GCC, check for anonymous
8533 namespaces based on the demangled name. */
8534 if (!processing_has_namespace_info
8535 && cu
->language
== language_cplus
8536 && dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
) != NULL
)
8537 cp_scan_for_anonymous_namespaces (sym
);
8542 /* Copy constant value from an attribute to a symbol. */
8545 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8546 struct dwarf2_cu
*cu
)
8548 struct objfile
*objfile
= cu
->objfile
;
8549 struct comp_unit_head
*cu_header
= &cu
->header
;
8550 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8551 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8552 struct dwarf_block
*blk
;
8557 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8558 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8559 cu_header
->addr_size
,
8560 TYPE_LENGTH (SYMBOL_TYPE
8562 SYMBOL_VALUE_BYTES (sym
) =
8563 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8564 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8565 it's body - store_unsigned_integer. */
8566 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8567 byte_order
, DW_ADDR (attr
));
8568 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8570 case DW_FORM_string
:
8572 /* DW_STRING is already allocated on the obstack, point directly
8574 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8575 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8577 case DW_FORM_block1
:
8578 case DW_FORM_block2
:
8579 case DW_FORM_block4
:
8581 blk
= DW_BLOCK (attr
);
8582 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8583 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8585 TYPE_LENGTH (SYMBOL_TYPE
8587 SYMBOL_VALUE_BYTES (sym
) =
8588 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8589 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8590 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8593 /* The DW_AT_const_value attributes are supposed to carry the
8594 symbol's value "represented as it would be on the target
8595 architecture." By the time we get here, it's already been
8596 converted to host endianness, so we just need to sign- or
8597 zero-extend it as appropriate. */
8599 dwarf2_const_value_data (attr
, sym
, 8);
8602 dwarf2_const_value_data (attr
, sym
, 16);
8605 dwarf2_const_value_data (attr
, sym
, 32);
8608 dwarf2_const_value_data (attr
, sym
, 64);
8612 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8613 SYMBOL_CLASS (sym
) = LOC_CONST
;
8617 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8618 SYMBOL_CLASS (sym
) = LOC_CONST
;
8622 complaint (&symfile_complaints
,
8623 _("unsupported const value attribute form: '%s'"),
8624 dwarf_form_name (attr
->form
));
8625 SYMBOL_VALUE (sym
) = 0;
8626 SYMBOL_CLASS (sym
) = LOC_CONST
;
8632 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8633 or zero-extend it as appropriate for the symbol's type. */
8635 dwarf2_const_value_data (struct attribute
*attr
,
8639 LONGEST l
= DW_UNSND (attr
);
8641 if (bits
< sizeof (l
) * 8)
8643 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8644 l
&= ((LONGEST
) 1 << bits
) - 1;
8646 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8649 SYMBOL_VALUE (sym
) = l
;
8650 SYMBOL_CLASS (sym
) = LOC_CONST
;
8654 /* Return the type of the die in question using its DW_AT_type attribute. */
8656 static struct type
*
8657 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8660 struct attribute
*type_attr
;
8661 struct die_info
*type_die
;
8663 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8666 /* A missing DW_AT_type represents a void type. */
8667 return objfile_type (cu
->objfile
)->builtin_void
;
8670 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8672 type
= tag_type_to_type (type_die
, cu
);
8675 dump_die_for_error (type_die
);
8676 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8682 /* Return the containing type of the die in question using its
8683 DW_AT_containing_type attribute. */
8685 static struct type
*
8686 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8688 struct type
*type
= NULL
;
8689 struct attribute
*type_attr
;
8690 struct die_info
*type_die
= NULL
;
8692 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8695 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8696 type
= tag_type_to_type (type_die
, cu
);
8701 dump_die_for_error (type_die
);
8702 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8708 static struct type
*
8709 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8711 struct type
*this_type
;
8713 this_type
= read_type_die (die
, cu
);
8716 dump_die_for_error (die
);
8717 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8723 static struct type
*
8724 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8726 struct type
*this_type
;
8728 this_type
= get_die_type (die
, cu
);
8734 case DW_TAG_class_type
:
8735 case DW_TAG_interface_type
:
8736 case DW_TAG_structure_type
:
8737 case DW_TAG_union_type
:
8738 this_type
= read_structure_type (die
, cu
);
8740 case DW_TAG_enumeration_type
:
8741 this_type
= read_enumeration_type (die
, cu
);
8743 case DW_TAG_subprogram
:
8744 case DW_TAG_subroutine_type
:
8745 case DW_TAG_inlined_subroutine
:
8746 this_type
= read_subroutine_type (die
, cu
);
8748 case DW_TAG_array_type
:
8749 this_type
= read_array_type (die
, cu
);
8751 case DW_TAG_set_type
:
8752 this_type
= read_set_type (die
, cu
);
8754 case DW_TAG_pointer_type
:
8755 this_type
= read_tag_pointer_type (die
, cu
);
8757 case DW_TAG_ptr_to_member_type
:
8758 this_type
= read_tag_ptr_to_member_type (die
, cu
);
8760 case DW_TAG_reference_type
:
8761 this_type
= read_tag_reference_type (die
, cu
);
8763 case DW_TAG_const_type
:
8764 this_type
= read_tag_const_type (die
, cu
);
8766 case DW_TAG_volatile_type
:
8767 this_type
= read_tag_volatile_type (die
, cu
);
8769 case DW_TAG_string_type
:
8770 this_type
= read_tag_string_type (die
, cu
);
8772 case DW_TAG_typedef
:
8773 this_type
= read_typedef (die
, cu
);
8775 case DW_TAG_subrange_type
:
8776 this_type
= read_subrange_type (die
, cu
);
8778 case DW_TAG_base_type
:
8779 this_type
= read_base_type (die
, cu
);
8781 case DW_TAG_unspecified_type
:
8782 this_type
= read_unspecified_type (die
, cu
);
8784 case DW_TAG_namespace
:
8785 this_type
= read_namespace_type (die
, cu
);
8788 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
8789 dwarf_tag_name (die
->tag
));
8796 /* Return the name of the namespace/class that DIE is defined within,
8797 or "" if we can't tell. The caller should not xfree the result.
8799 For example, if we're within the method foo() in the following
8809 then determine_prefix on foo's die will return "N::C". */
8812 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
8814 struct die_info
*parent
, *spec_die
;
8815 struct dwarf2_cu
*spec_cu
;
8816 struct type
*parent_type
;
8818 if (cu
->language
!= language_cplus
8819 && cu
->language
!= language_java
)
8822 /* We have to be careful in the presence of DW_AT_specification.
8823 For example, with GCC 3.4, given the code
8827 // Definition of N::foo.
8831 then we'll have a tree of DIEs like this:
8833 1: DW_TAG_compile_unit
8834 2: DW_TAG_namespace // N
8835 3: DW_TAG_subprogram // declaration of N::foo
8836 4: DW_TAG_subprogram // definition of N::foo
8837 DW_AT_specification // refers to die #3
8839 Thus, when processing die #4, we have to pretend that we're in
8840 the context of its DW_AT_specification, namely the contex of die
8843 spec_die
= die_specification (die
, &spec_cu
);
8844 if (spec_die
== NULL
)
8845 parent
= die
->parent
;
8848 parent
= spec_die
->parent
;
8855 switch (parent
->tag
)
8857 case DW_TAG_namespace
:
8858 parent_type
= read_type_die (parent
, cu
);
8859 /* We give a name to even anonymous namespaces. */
8860 return TYPE_TAG_NAME (parent_type
);
8861 case DW_TAG_class_type
:
8862 case DW_TAG_interface_type
:
8863 case DW_TAG_structure_type
:
8864 case DW_TAG_union_type
:
8865 parent_type
= read_type_die (parent
, cu
);
8866 if (TYPE_TAG_NAME (parent_type
) != NULL
)
8867 return TYPE_TAG_NAME (parent_type
);
8869 /* An anonymous structure is only allowed non-static data
8870 members; no typedefs, no member functions, et cetera.
8871 So it does not need a prefix. */
8874 return determine_prefix (parent
, cu
);
8878 /* Return a newly-allocated string formed by concatenating PREFIX and
8879 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8880 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8881 perform an obconcat, otherwise allocate storage for the result. The CU argument
8882 is used to determine the language and hence, the appropriate separator. */
8884 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8887 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
8888 struct dwarf2_cu
*cu
)
8892 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
8894 else if (cu
->language
== language_java
)
8906 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
8907 strcpy (retval
, prefix
);
8908 strcat (retval
, sep
);
8909 strcat (retval
, suffix
);
8914 /* We have an obstack. */
8915 return obconcat (obs
, prefix
, sep
, suffix
);
8919 /* Return sibling of die, NULL if no sibling. */
8921 static struct die_info
*
8922 sibling_die (struct die_info
*die
)
8924 return die
->sibling
;
8927 /* Get linkage name of a die, return NULL if not found. */
8930 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8932 struct attribute
*attr
;
8934 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8935 if (attr
&& DW_STRING (attr
))
8936 return DW_STRING (attr
);
8937 return dwarf2_name (die
, cu
);
8940 /* Get name of a die, return NULL if not found. */
8943 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
8944 struct obstack
*obstack
)
8946 if (name
&& cu
->language
== language_cplus
)
8948 char *canon_name
= cp_canonicalize_string (name
);
8950 if (canon_name
!= NULL
)
8952 if (strcmp (canon_name
, name
) != 0)
8953 name
= obsavestring (canon_name
, strlen (canon_name
),
8962 /* Get name of a die, return NULL if not found. */
8965 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8967 struct attribute
*attr
;
8969 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8970 if (!attr
|| !DW_STRING (attr
))
8975 case DW_TAG_compile_unit
:
8976 /* Compilation units have a DW_AT_name that is a filename, not
8977 a source language identifier. */
8978 case DW_TAG_enumeration_type
:
8979 case DW_TAG_enumerator
:
8980 /* These tags always have simple identifiers already; no need
8981 to canonicalize them. */
8982 return DW_STRING (attr
);
8984 if (!DW_STRING_IS_CANONICAL (attr
))
8987 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
8988 &cu
->objfile
->objfile_obstack
);
8989 DW_STRING_IS_CANONICAL (attr
) = 1;
8991 return DW_STRING (attr
);
8995 /* Return the die that this die in an extension of, or NULL if there
8996 is none. *EXT_CU is the CU containing DIE on input, and the CU
8997 containing the return value on output. */
8999 static struct die_info
*
9000 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9002 struct attribute
*attr
;
9004 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9008 return follow_die_ref (die
, attr
, ext_cu
);
9011 /* Convert a DIE tag into its string name. */
9014 dwarf_tag_name (unsigned tag
)
9018 case DW_TAG_padding
:
9019 return "DW_TAG_padding";
9020 case DW_TAG_array_type
:
9021 return "DW_TAG_array_type";
9022 case DW_TAG_class_type
:
9023 return "DW_TAG_class_type";
9024 case DW_TAG_entry_point
:
9025 return "DW_TAG_entry_point";
9026 case DW_TAG_enumeration_type
:
9027 return "DW_TAG_enumeration_type";
9028 case DW_TAG_formal_parameter
:
9029 return "DW_TAG_formal_parameter";
9030 case DW_TAG_imported_declaration
:
9031 return "DW_TAG_imported_declaration";
9033 return "DW_TAG_label";
9034 case DW_TAG_lexical_block
:
9035 return "DW_TAG_lexical_block";
9037 return "DW_TAG_member";
9038 case DW_TAG_pointer_type
:
9039 return "DW_TAG_pointer_type";
9040 case DW_TAG_reference_type
:
9041 return "DW_TAG_reference_type";
9042 case DW_TAG_compile_unit
:
9043 return "DW_TAG_compile_unit";
9044 case DW_TAG_string_type
:
9045 return "DW_TAG_string_type";
9046 case DW_TAG_structure_type
:
9047 return "DW_TAG_structure_type";
9048 case DW_TAG_subroutine_type
:
9049 return "DW_TAG_subroutine_type";
9050 case DW_TAG_typedef
:
9051 return "DW_TAG_typedef";
9052 case DW_TAG_union_type
:
9053 return "DW_TAG_union_type";
9054 case DW_TAG_unspecified_parameters
:
9055 return "DW_TAG_unspecified_parameters";
9056 case DW_TAG_variant
:
9057 return "DW_TAG_variant";
9058 case DW_TAG_common_block
:
9059 return "DW_TAG_common_block";
9060 case DW_TAG_common_inclusion
:
9061 return "DW_TAG_common_inclusion";
9062 case DW_TAG_inheritance
:
9063 return "DW_TAG_inheritance";
9064 case DW_TAG_inlined_subroutine
:
9065 return "DW_TAG_inlined_subroutine";
9067 return "DW_TAG_module";
9068 case DW_TAG_ptr_to_member_type
:
9069 return "DW_TAG_ptr_to_member_type";
9070 case DW_TAG_set_type
:
9071 return "DW_TAG_set_type";
9072 case DW_TAG_subrange_type
:
9073 return "DW_TAG_subrange_type";
9074 case DW_TAG_with_stmt
:
9075 return "DW_TAG_with_stmt";
9076 case DW_TAG_access_declaration
:
9077 return "DW_TAG_access_declaration";
9078 case DW_TAG_base_type
:
9079 return "DW_TAG_base_type";
9080 case DW_TAG_catch_block
:
9081 return "DW_TAG_catch_block";
9082 case DW_TAG_const_type
:
9083 return "DW_TAG_const_type";
9084 case DW_TAG_constant
:
9085 return "DW_TAG_constant";
9086 case DW_TAG_enumerator
:
9087 return "DW_TAG_enumerator";
9088 case DW_TAG_file_type
:
9089 return "DW_TAG_file_type";
9091 return "DW_TAG_friend";
9092 case DW_TAG_namelist
:
9093 return "DW_TAG_namelist";
9094 case DW_TAG_namelist_item
:
9095 return "DW_TAG_namelist_item";
9096 case DW_TAG_packed_type
:
9097 return "DW_TAG_packed_type";
9098 case DW_TAG_subprogram
:
9099 return "DW_TAG_subprogram";
9100 case DW_TAG_template_type_param
:
9101 return "DW_TAG_template_type_param";
9102 case DW_TAG_template_value_param
:
9103 return "DW_TAG_template_value_param";
9104 case DW_TAG_thrown_type
:
9105 return "DW_TAG_thrown_type";
9106 case DW_TAG_try_block
:
9107 return "DW_TAG_try_block";
9108 case DW_TAG_variant_part
:
9109 return "DW_TAG_variant_part";
9110 case DW_TAG_variable
:
9111 return "DW_TAG_variable";
9112 case DW_TAG_volatile_type
:
9113 return "DW_TAG_volatile_type";
9114 case DW_TAG_dwarf_procedure
:
9115 return "DW_TAG_dwarf_procedure";
9116 case DW_TAG_restrict_type
:
9117 return "DW_TAG_restrict_type";
9118 case DW_TAG_interface_type
:
9119 return "DW_TAG_interface_type";
9120 case DW_TAG_namespace
:
9121 return "DW_TAG_namespace";
9122 case DW_TAG_imported_module
:
9123 return "DW_TAG_imported_module";
9124 case DW_TAG_unspecified_type
:
9125 return "DW_TAG_unspecified_type";
9126 case DW_TAG_partial_unit
:
9127 return "DW_TAG_partial_unit";
9128 case DW_TAG_imported_unit
:
9129 return "DW_TAG_imported_unit";
9130 case DW_TAG_condition
:
9131 return "DW_TAG_condition";
9132 case DW_TAG_shared_type
:
9133 return "DW_TAG_shared_type";
9134 case DW_TAG_type_unit
:
9135 return "DW_TAG_type_unit";
9136 case DW_TAG_MIPS_loop
:
9137 return "DW_TAG_MIPS_loop";
9138 case DW_TAG_HP_array_descriptor
:
9139 return "DW_TAG_HP_array_descriptor";
9140 case DW_TAG_format_label
:
9141 return "DW_TAG_format_label";
9142 case DW_TAG_function_template
:
9143 return "DW_TAG_function_template";
9144 case DW_TAG_class_template
:
9145 return "DW_TAG_class_template";
9146 case DW_TAG_GNU_BINCL
:
9147 return "DW_TAG_GNU_BINCL";
9148 case DW_TAG_GNU_EINCL
:
9149 return "DW_TAG_GNU_EINCL";
9150 case DW_TAG_upc_shared_type
:
9151 return "DW_TAG_upc_shared_type";
9152 case DW_TAG_upc_strict_type
:
9153 return "DW_TAG_upc_strict_type";
9154 case DW_TAG_upc_relaxed_type
:
9155 return "DW_TAG_upc_relaxed_type";
9156 case DW_TAG_PGI_kanji_type
:
9157 return "DW_TAG_PGI_kanji_type";
9158 case DW_TAG_PGI_interface_block
:
9159 return "DW_TAG_PGI_interface_block";
9161 return "DW_TAG_<unknown>";
9165 /* Convert a DWARF attribute code into its string name. */
9168 dwarf_attr_name (unsigned attr
)
9173 return "DW_AT_sibling";
9174 case DW_AT_location
:
9175 return "DW_AT_location";
9177 return "DW_AT_name";
9178 case DW_AT_ordering
:
9179 return "DW_AT_ordering";
9180 case DW_AT_subscr_data
:
9181 return "DW_AT_subscr_data";
9182 case DW_AT_byte_size
:
9183 return "DW_AT_byte_size";
9184 case DW_AT_bit_offset
:
9185 return "DW_AT_bit_offset";
9186 case DW_AT_bit_size
:
9187 return "DW_AT_bit_size";
9188 case DW_AT_element_list
:
9189 return "DW_AT_element_list";
9190 case DW_AT_stmt_list
:
9191 return "DW_AT_stmt_list";
9193 return "DW_AT_low_pc";
9195 return "DW_AT_high_pc";
9196 case DW_AT_language
:
9197 return "DW_AT_language";
9199 return "DW_AT_member";
9201 return "DW_AT_discr";
9202 case DW_AT_discr_value
:
9203 return "DW_AT_discr_value";
9204 case DW_AT_visibility
:
9205 return "DW_AT_visibility";
9207 return "DW_AT_import";
9208 case DW_AT_string_length
:
9209 return "DW_AT_string_length";
9210 case DW_AT_common_reference
:
9211 return "DW_AT_common_reference";
9212 case DW_AT_comp_dir
:
9213 return "DW_AT_comp_dir";
9214 case DW_AT_const_value
:
9215 return "DW_AT_const_value";
9216 case DW_AT_containing_type
:
9217 return "DW_AT_containing_type";
9218 case DW_AT_default_value
:
9219 return "DW_AT_default_value";
9221 return "DW_AT_inline";
9222 case DW_AT_is_optional
:
9223 return "DW_AT_is_optional";
9224 case DW_AT_lower_bound
:
9225 return "DW_AT_lower_bound";
9226 case DW_AT_producer
:
9227 return "DW_AT_producer";
9228 case DW_AT_prototyped
:
9229 return "DW_AT_prototyped";
9230 case DW_AT_return_addr
:
9231 return "DW_AT_return_addr";
9232 case DW_AT_start_scope
:
9233 return "DW_AT_start_scope";
9234 case DW_AT_bit_stride
:
9235 return "DW_AT_bit_stride";
9236 case DW_AT_upper_bound
:
9237 return "DW_AT_upper_bound";
9238 case DW_AT_abstract_origin
:
9239 return "DW_AT_abstract_origin";
9240 case DW_AT_accessibility
:
9241 return "DW_AT_accessibility";
9242 case DW_AT_address_class
:
9243 return "DW_AT_address_class";
9244 case DW_AT_artificial
:
9245 return "DW_AT_artificial";
9246 case DW_AT_base_types
:
9247 return "DW_AT_base_types";
9248 case DW_AT_calling_convention
:
9249 return "DW_AT_calling_convention";
9251 return "DW_AT_count";
9252 case DW_AT_data_member_location
:
9253 return "DW_AT_data_member_location";
9254 case DW_AT_decl_column
:
9255 return "DW_AT_decl_column";
9256 case DW_AT_decl_file
:
9257 return "DW_AT_decl_file";
9258 case DW_AT_decl_line
:
9259 return "DW_AT_decl_line";
9260 case DW_AT_declaration
:
9261 return "DW_AT_declaration";
9262 case DW_AT_discr_list
:
9263 return "DW_AT_discr_list";
9264 case DW_AT_encoding
:
9265 return "DW_AT_encoding";
9266 case DW_AT_external
:
9267 return "DW_AT_external";
9268 case DW_AT_frame_base
:
9269 return "DW_AT_frame_base";
9271 return "DW_AT_friend";
9272 case DW_AT_identifier_case
:
9273 return "DW_AT_identifier_case";
9274 case DW_AT_macro_info
:
9275 return "DW_AT_macro_info";
9276 case DW_AT_namelist_items
:
9277 return "DW_AT_namelist_items";
9278 case DW_AT_priority
:
9279 return "DW_AT_priority";
9281 return "DW_AT_segment";
9282 case DW_AT_specification
:
9283 return "DW_AT_specification";
9284 case DW_AT_static_link
:
9285 return "DW_AT_static_link";
9287 return "DW_AT_type";
9288 case DW_AT_use_location
:
9289 return "DW_AT_use_location";
9290 case DW_AT_variable_parameter
:
9291 return "DW_AT_variable_parameter";
9292 case DW_AT_virtuality
:
9293 return "DW_AT_virtuality";
9294 case DW_AT_vtable_elem_location
:
9295 return "DW_AT_vtable_elem_location";
9296 /* DWARF 3 values. */
9297 case DW_AT_allocated
:
9298 return "DW_AT_allocated";
9299 case DW_AT_associated
:
9300 return "DW_AT_associated";
9301 case DW_AT_data_location
:
9302 return "DW_AT_data_location";
9303 case DW_AT_byte_stride
:
9304 return "DW_AT_byte_stride";
9305 case DW_AT_entry_pc
:
9306 return "DW_AT_entry_pc";
9307 case DW_AT_use_UTF8
:
9308 return "DW_AT_use_UTF8";
9309 case DW_AT_extension
:
9310 return "DW_AT_extension";
9312 return "DW_AT_ranges";
9313 case DW_AT_trampoline
:
9314 return "DW_AT_trampoline";
9315 case DW_AT_call_column
:
9316 return "DW_AT_call_column";
9317 case DW_AT_call_file
:
9318 return "DW_AT_call_file";
9319 case DW_AT_call_line
:
9320 return "DW_AT_call_line";
9321 case DW_AT_description
:
9322 return "DW_AT_description";
9323 case DW_AT_binary_scale
:
9324 return "DW_AT_binary_scale";
9325 case DW_AT_decimal_scale
:
9326 return "DW_AT_decimal_scale";
9328 return "DW_AT_small";
9329 case DW_AT_decimal_sign
:
9330 return "DW_AT_decimal_sign";
9331 case DW_AT_digit_count
:
9332 return "DW_AT_digit_count";
9333 case DW_AT_picture_string
:
9334 return "DW_AT_picture_string";
9336 return "DW_AT_mutable";
9337 case DW_AT_threads_scaled
:
9338 return "DW_AT_threads_scaled";
9339 case DW_AT_explicit
:
9340 return "DW_AT_explicit";
9341 case DW_AT_object_pointer
:
9342 return "DW_AT_object_pointer";
9343 case DW_AT_endianity
:
9344 return "DW_AT_endianity";
9345 case DW_AT_elemental
:
9346 return "DW_AT_elemental";
9348 return "DW_AT_pure";
9349 case DW_AT_recursive
:
9350 return "DW_AT_recursive";
9351 /* DWARF 4 values. */
9352 case DW_AT_signature
:
9353 return "DW_AT_signature";
9354 /* SGI/MIPS extensions. */
9355 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9356 case DW_AT_MIPS_fde
:
9357 return "DW_AT_MIPS_fde";
9359 case DW_AT_MIPS_loop_begin
:
9360 return "DW_AT_MIPS_loop_begin";
9361 case DW_AT_MIPS_tail_loop_begin
:
9362 return "DW_AT_MIPS_tail_loop_begin";
9363 case DW_AT_MIPS_epilog_begin
:
9364 return "DW_AT_MIPS_epilog_begin";
9365 case DW_AT_MIPS_loop_unroll_factor
:
9366 return "DW_AT_MIPS_loop_unroll_factor";
9367 case DW_AT_MIPS_software_pipeline_depth
:
9368 return "DW_AT_MIPS_software_pipeline_depth";
9369 case DW_AT_MIPS_linkage_name
:
9370 return "DW_AT_MIPS_linkage_name";
9371 case DW_AT_MIPS_stride
:
9372 return "DW_AT_MIPS_stride";
9373 case DW_AT_MIPS_abstract_name
:
9374 return "DW_AT_MIPS_abstract_name";
9375 case DW_AT_MIPS_clone_origin
:
9376 return "DW_AT_MIPS_clone_origin";
9377 case DW_AT_MIPS_has_inlines
:
9378 return "DW_AT_MIPS_has_inlines";
9379 /* HP extensions. */
9380 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9381 case DW_AT_HP_block_index
:
9382 return "DW_AT_HP_block_index";
9384 case DW_AT_HP_unmodifiable
:
9385 return "DW_AT_HP_unmodifiable";
9386 case DW_AT_HP_actuals_stmt_list
:
9387 return "DW_AT_HP_actuals_stmt_list";
9388 case DW_AT_HP_proc_per_section
:
9389 return "DW_AT_HP_proc_per_section";
9390 case DW_AT_HP_raw_data_ptr
:
9391 return "DW_AT_HP_raw_data_ptr";
9392 case DW_AT_HP_pass_by_reference
:
9393 return "DW_AT_HP_pass_by_reference";
9394 case DW_AT_HP_opt_level
:
9395 return "DW_AT_HP_opt_level";
9396 case DW_AT_HP_prof_version_id
:
9397 return "DW_AT_HP_prof_version_id";
9398 case DW_AT_HP_opt_flags
:
9399 return "DW_AT_HP_opt_flags";
9400 case DW_AT_HP_cold_region_low_pc
:
9401 return "DW_AT_HP_cold_region_low_pc";
9402 case DW_AT_HP_cold_region_high_pc
:
9403 return "DW_AT_HP_cold_region_high_pc";
9404 case DW_AT_HP_all_variables_modifiable
:
9405 return "DW_AT_HP_all_variables_modifiable";
9406 case DW_AT_HP_linkage_name
:
9407 return "DW_AT_HP_linkage_name";
9408 case DW_AT_HP_prof_flags
:
9409 return "DW_AT_HP_prof_flags";
9410 /* GNU extensions. */
9411 case DW_AT_sf_names
:
9412 return "DW_AT_sf_names";
9413 case DW_AT_src_info
:
9414 return "DW_AT_src_info";
9415 case DW_AT_mac_info
:
9416 return "DW_AT_mac_info";
9417 case DW_AT_src_coords
:
9418 return "DW_AT_src_coords";
9419 case DW_AT_body_begin
:
9420 return "DW_AT_body_begin";
9421 case DW_AT_body_end
:
9422 return "DW_AT_body_end";
9423 case DW_AT_GNU_vector
:
9424 return "DW_AT_GNU_vector";
9425 /* VMS extensions. */
9426 case DW_AT_VMS_rtnbeg_pd_address
:
9427 return "DW_AT_VMS_rtnbeg_pd_address";
9428 /* UPC extension. */
9429 case DW_AT_upc_threads_scaled
:
9430 return "DW_AT_upc_threads_scaled";
9431 /* PGI (STMicroelectronics) extensions. */
9432 case DW_AT_PGI_lbase
:
9433 return "DW_AT_PGI_lbase";
9434 case DW_AT_PGI_soffset
:
9435 return "DW_AT_PGI_soffset";
9436 case DW_AT_PGI_lstride
:
9437 return "DW_AT_PGI_lstride";
9439 return "DW_AT_<unknown>";
9443 /* Convert a DWARF value form code into its string name. */
9446 dwarf_form_name (unsigned form
)
9451 return "DW_FORM_addr";
9452 case DW_FORM_block2
:
9453 return "DW_FORM_block2";
9454 case DW_FORM_block4
:
9455 return "DW_FORM_block4";
9457 return "DW_FORM_data2";
9459 return "DW_FORM_data4";
9461 return "DW_FORM_data8";
9462 case DW_FORM_string
:
9463 return "DW_FORM_string";
9465 return "DW_FORM_block";
9466 case DW_FORM_block1
:
9467 return "DW_FORM_block1";
9469 return "DW_FORM_data1";
9471 return "DW_FORM_flag";
9473 return "DW_FORM_sdata";
9475 return "DW_FORM_strp";
9477 return "DW_FORM_udata";
9478 case DW_FORM_ref_addr
:
9479 return "DW_FORM_ref_addr";
9481 return "DW_FORM_ref1";
9483 return "DW_FORM_ref2";
9485 return "DW_FORM_ref4";
9487 return "DW_FORM_ref8";
9488 case DW_FORM_ref_udata
:
9489 return "DW_FORM_ref_udata";
9490 case DW_FORM_indirect
:
9491 return "DW_FORM_indirect";
9492 case DW_FORM_sec_offset
:
9493 return "DW_FORM_sec_offset";
9494 case DW_FORM_exprloc
:
9495 return "DW_FORM_exprloc";
9496 case DW_FORM_flag_present
:
9497 return "DW_FORM_flag_present";
9499 return "DW_FORM_sig8";
9501 return "DW_FORM_<unknown>";
9505 /* Convert a DWARF stack opcode into its string name. */
9508 dwarf_stack_op_name (unsigned op
)
9513 return "DW_OP_addr";
9515 return "DW_OP_deref";
9517 return "DW_OP_const1u";
9519 return "DW_OP_const1s";
9521 return "DW_OP_const2u";
9523 return "DW_OP_const2s";
9525 return "DW_OP_const4u";
9527 return "DW_OP_const4s";
9529 return "DW_OP_const8u";
9531 return "DW_OP_const8s";
9533 return "DW_OP_constu";
9535 return "DW_OP_consts";
9539 return "DW_OP_drop";
9541 return "DW_OP_over";
9543 return "DW_OP_pick";
9545 return "DW_OP_swap";
9549 return "DW_OP_xderef";
9557 return "DW_OP_minus";
9569 return "DW_OP_plus";
9570 case DW_OP_plus_uconst
:
9571 return "DW_OP_plus_uconst";
9577 return "DW_OP_shra";
9595 return "DW_OP_skip";
9597 return "DW_OP_lit0";
9599 return "DW_OP_lit1";
9601 return "DW_OP_lit2";
9603 return "DW_OP_lit3";
9605 return "DW_OP_lit4";
9607 return "DW_OP_lit5";
9609 return "DW_OP_lit6";
9611 return "DW_OP_lit7";
9613 return "DW_OP_lit8";
9615 return "DW_OP_lit9";
9617 return "DW_OP_lit10";
9619 return "DW_OP_lit11";
9621 return "DW_OP_lit12";
9623 return "DW_OP_lit13";
9625 return "DW_OP_lit14";
9627 return "DW_OP_lit15";
9629 return "DW_OP_lit16";
9631 return "DW_OP_lit17";
9633 return "DW_OP_lit18";
9635 return "DW_OP_lit19";
9637 return "DW_OP_lit20";
9639 return "DW_OP_lit21";
9641 return "DW_OP_lit22";
9643 return "DW_OP_lit23";
9645 return "DW_OP_lit24";
9647 return "DW_OP_lit25";
9649 return "DW_OP_lit26";
9651 return "DW_OP_lit27";
9653 return "DW_OP_lit28";
9655 return "DW_OP_lit29";
9657 return "DW_OP_lit30";
9659 return "DW_OP_lit31";
9661 return "DW_OP_reg0";
9663 return "DW_OP_reg1";
9665 return "DW_OP_reg2";
9667 return "DW_OP_reg3";
9669 return "DW_OP_reg4";
9671 return "DW_OP_reg5";
9673 return "DW_OP_reg6";
9675 return "DW_OP_reg7";
9677 return "DW_OP_reg8";
9679 return "DW_OP_reg9";
9681 return "DW_OP_reg10";
9683 return "DW_OP_reg11";
9685 return "DW_OP_reg12";
9687 return "DW_OP_reg13";
9689 return "DW_OP_reg14";
9691 return "DW_OP_reg15";
9693 return "DW_OP_reg16";
9695 return "DW_OP_reg17";
9697 return "DW_OP_reg18";
9699 return "DW_OP_reg19";
9701 return "DW_OP_reg20";
9703 return "DW_OP_reg21";
9705 return "DW_OP_reg22";
9707 return "DW_OP_reg23";
9709 return "DW_OP_reg24";
9711 return "DW_OP_reg25";
9713 return "DW_OP_reg26";
9715 return "DW_OP_reg27";
9717 return "DW_OP_reg28";
9719 return "DW_OP_reg29";
9721 return "DW_OP_reg30";
9723 return "DW_OP_reg31";
9725 return "DW_OP_breg0";
9727 return "DW_OP_breg1";
9729 return "DW_OP_breg2";
9731 return "DW_OP_breg3";
9733 return "DW_OP_breg4";
9735 return "DW_OP_breg5";
9737 return "DW_OP_breg6";
9739 return "DW_OP_breg7";
9741 return "DW_OP_breg8";
9743 return "DW_OP_breg9";
9745 return "DW_OP_breg10";
9747 return "DW_OP_breg11";
9749 return "DW_OP_breg12";
9751 return "DW_OP_breg13";
9753 return "DW_OP_breg14";
9755 return "DW_OP_breg15";
9757 return "DW_OP_breg16";
9759 return "DW_OP_breg17";
9761 return "DW_OP_breg18";
9763 return "DW_OP_breg19";
9765 return "DW_OP_breg20";
9767 return "DW_OP_breg21";
9769 return "DW_OP_breg22";
9771 return "DW_OP_breg23";
9773 return "DW_OP_breg24";
9775 return "DW_OP_breg25";
9777 return "DW_OP_breg26";
9779 return "DW_OP_breg27";
9781 return "DW_OP_breg28";
9783 return "DW_OP_breg29";
9785 return "DW_OP_breg30";
9787 return "DW_OP_breg31";
9789 return "DW_OP_regx";
9791 return "DW_OP_fbreg";
9793 return "DW_OP_bregx";
9795 return "DW_OP_piece";
9796 case DW_OP_deref_size
:
9797 return "DW_OP_deref_size";
9798 case DW_OP_xderef_size
:
9799 return "DW_OP_xderef_size";
9802 /* DWARF 3 extensions. */
9803 case DW_OP_push_object_address
:
9804 return "DW_OP_push_object_address";
9806 return "DW_OP_call2";
9808 return "DW_OP_call4";
9809 case DW_OP_call_ref
:
9810 return "DW_OP_call_ref";
9811 /* GNU extensions. */
9812 case DW_OP_form_tls_address
:
9813 return "DW_OP_form_tls_address";
9814 case DW_OP_call_frame_cfa
:
9815 return "DW_OP_call_frame_cfa";
9816 case DW_OP_bit_piece
:
9817 return "DW_OP_bit_piece";
9818 case DW_OP_GNU_push_tls_address
:
9819 return "DW_OP_GNU_push_tls_address";
9820 case DW_OP_GNU_uninit
:
9821 return "DW_OP_GNU_uninit";
9822 /* HP extensions. */
9823 case DW_OP_HP_is_value
:
9824 return "DW_OP_HP_is_value";
9825 case DW_OP_HP_fltconst4
:
9826 return "DW_OP_HP_fltconst4";
9827 case DW_OP_HP_fltconst8
:
9828 return "DW_OP_HP_fltconst8";
9829 case DW_OP_HP_mod_range
:
9830 return "DW_OP_HP_mod_range";
9831 case DW_OP_HP_unmod_range
:
9832 return "DW_OP_HP_unmod_range";
9834 return "DW_OP_HP_tls";
9836 return "OP_<unknown>";
9841 dwarf_bool_name (unsigned mybool
)
9849 /* Convert a DWARF type code into its string name. */
9852 dwarf_type_encoding_name (unsigned enc
)
9857 return "DW_ATE_void";
9858 case DW_ATE_address
:
9859 return "DW_ATE_address";
9860 case DW_ATE_boolean
:
9861 return "DW_ATE_boolean";
9862 case DW_ATE_complex_float
:
9863 return "DW_ATE_complex_float";
9865 return "DW_ATE_float";
9867 return "DW_ATE_signed";
9868 case DW_ATE_signed_char
:
9869 return "DW_ATE_signed_char";
9870 case DW_ATE_unsigned
:
9871 return "DW_ATE_unsigned";
9872 case DW_ATE_unsigned_char
:
9873 return "DW_ATE_unsigned_char";
9875 case DW_ATE_imaginary_float
:
9876 return "DW_ATE_imaginary_float";
9877 case DW_ATE_packed_decimal
:
9878 return "DW_ATE_packed_decimal";
9879 case DW_ATE_numeric_string
:
9880 return "DW_ATE_numeric_string";
9882 return "DW_ATE_edited";
9883 case DW_ATE_signed_fixed
:
9884 return "DW_ATE_signed_fixed";
9885 case DW_ATE_unsigned_fixed
:
9886 return "DW_ATE_unsigned_fixed";
9887 case DW_ATE_decimal_float
:
9888 return "DW_ATE_decimal_float";
9889 /* HP extensions. */
9890 case DW_ATE_HP_float80
:
9891 return "DW_ATE_HP_float80";
9892 case DW_ATE_HP_complex_float80
:
9893 return "DW_ATE_HP_complex_float80";
9894 case DW_ATE_HP_float128
:
9895 return "DW_ATE_HP_float128";
9896 case DW_ATE_HP_complex_float128
:
9897 return "DW_ATE_HP_complex_float128";
9898 case DW_ATE_HP_floathpintel
:
9899 return "DW_ATE_HP_floathpintel";
9900 case DW_ATE_HP_imaginary_float80
:
9901 return "DW_ATE_HP_imaginary_float80";
9902 case DW_ATE_HP_imaginary_float128
:
9903 return "DW_ATE_HP_imaginary_float128";
9905 return "DW_ATE_<unknown>";
9909 /* Convert a DWARF call frame info operation to its string name. */
9913 dwarf_cfi_name (unsigned cfi_opc
)
9917 case DW_CFA_advance_loc
:
9918 return "DW_CFA_advance_loc";
9920 return "DW_CFA_offset";
9921 case DW_CFA_restore
:
9922 return "DW_CFA_restore";
9924 return "DW_CFA_nop";
9925 case DW_CFA_set_loc
:
9926 return "DW_CFA_set_loc";
9927 case DW_CFA_advance_loc1
:
9928 return "DW_CFA_advance_loc1";
9929 case DW_CFA_advance_loc2
:
9930 return "DW_CFA_advance_loc2";
9931 case DW_CFA_advance_loc4
:
9932 return "DW_CFA_advance_loc4";
9933 case DW_CFA_offset_extended
:
9934 return "DW_CFA_offset_extended";
9935 case DW_CFA_restore_extended
:
9936 return "DW_CFA_restore_extended";
9937 case DW_CFA_undefined
:
9938 return "DW_CFA_undefined";
9939 case DW_CFA_same_value
:
9940 return "DW_CFA_same_value";
9941 case DW_CFA_register
:
9942 return "DW_CFA_register";
9943 case DW_CFA_remember_state
:
9944 return "DW_CFA_remember_state";
9945 case DW_CFA_restore_state
:
9946 return "DW_CFA_restore_state";
9947 case DW_CFA_def_cfa
:
9948 return "DW_CFA_def_cfa";
9949 case DW_CFA_def_cfa_register
:
9950 return "DW_CFA_def_cfa_register";
9951 case DW_CFA_def_cfa_offset
:
9952 return "DW_CFA_def_cfa_offset";
9954 case DW_CFA_def_cfa_expression
:
9955 return "DW_CFA_def_cfa_expression";
9956 case DW_CFA_expression
:
9957 return "DW_CFA_expression";
9958 case DW_CFA_offset_extended_sf
:
9959 return "DW_CFA_offset_extended_sf";
9960 case DW_CFA_def_cfa_sf
:
9961 return "DW_CFA_def_cfa_sf";
9962 case DW_CFA_def_cfa_offset_sf
:
9963 return "DW_CFA_def_cfa_offset_sf";
9964 case DW_CFA_val_offset
:
9965 return "DW_CFA_val_offset";
9966 case DW_CFA_val_offset_sf
:
9967 return "DW_CFA_val_offset_sf";
9968 case DW_CFA_val_expression
:
9969 return "DW_CFA_val_expression";
9970 /* SGI/MIPS specific. */
9971 case DW_CFA_MIPS_advance_loc8
:
9972 return "DW_CFA_MIPS_advance_loc8";
9973 /* GNU extensions. */
9974 case DW_CFA_GNU_window_save
:
9975 return "DW_CFA_GNU_window_save";
9976 case DW_CFA_GNU_args_size
:
9977 return "DW_CFA_GNU_args_size";
9978 case DW_CFA_GNU_negative_offset_extended
:
9979 return "DW_CFA_GNU_negative_offset_extended";
9981 return "DW_CFA_<unknown>";
9987 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
9991 print_spaces (indent
, f
);
9992 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
9993 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
9995 if (die
->parent
!= NULL
)
9997 print_spaces (indent
, f
);
9998 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
9999 die
->parent
->offset
);
10002 print_spaces (indent
, f
);
10003 fprintf_unfiltered (f
, " has children: %s\n",
10004 dwarf_bool_name (die
->child
!= NULL
));
10006 print_spaces (indent
, f
);
10007 fprintf_unfiltered (f
, " attributes:\n");
10009 for (i
= 0; i
< die
->num_attrs
; ++i
)
10011 print_spaces (indent
, f
);
10012 fprintf_unfiltered (f
, " %s (%s) ",
10013 dwarf_attr_name (die
->attrs
[i
].name
),
10014 dwarf_form_name (die
->attrs
[i
].form
));
10016 switch (die
->attrs
[i
].form
)
10018 case DW_FORM_ref_addr
:
10020 fprintf_unfiltered (f
, "address: ");
10021 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10023 case DW_FORM_block2
:
10024 case DW_FORM_block4
:
10025 case DW_FORM_block
:
10026 case DW_FORM_block1
:
10027 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10032 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10033 (long) (DW_ADDR (&die
->attrs
[i
])));
10035 case DW_FORM_data1
:
10036 case DW_FORM_data2
:
10037 case DW_FORM_data4
:
10038 case DW_FORM_data8
:
10039 case DW_FORM_udata
:
10040 case DW_FORM_sdata
:
10041 fprintf_unfiltered (f
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
10044 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10045 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10046 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10048 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10050 case DW_FORM_string
:
10052 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10053 DW_STRING (&die
->attrs
[i
])
10054 ? DW_STRING (&die
->attrs
[i
]) : "",
10055 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10058 if (DW_UNSND (&die
->attrs
[i
]))
10059 fprintf_unfiltered (f
, "flag: TRUE");
10061 fprintf_unfiltered (f
, "flag: FALSE");
10063 case DW_FORM_indirect
:
10064 /* the reader will have reduced the indirect form to
10065 the "base form" so this form should not occur */
10066 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10069 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10070 die
->attrs
[i
].form
);
10073 fprintf_unfiltered (f
, "\n");
10078 dump_die_for_error (struct die_info
*die
)
10080 dump_die_shallow (gdb_stderr
, 0, die
);
10084 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10086 int indent
= level
* 4;
10088 gdb_assert (die
!= NULL
);
10090 if (level
>= max_level
)
10093 dump_die_shallow (f
, indent
, die
);
10095 if (die
->child
!= NULL
)
10097 print_spaces (indent
, f
);
10098 fprintf_unfiltered (f
, " Children:");
10099 if (level
+ 1 < max_level
)
10101 fprintf_unfiltered (f
, "\n");
10102 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10106 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10110 if (die
->sibling
!= NULL
&& level
> 0)
10112 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10116 /* This is called from the pdie macro in gdbinit.in.
10117 It's not static so gcc will keep a copy callable from gdb. */
10120 dump_die (struct die_info
*die
, int max_level
)
10122 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10126 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10130 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10136 is_ref_attr (struct attribute
*attr
)
10138 switch (attr
->form
)
10140 case DW_FORM_ref_addr
:
10145 case DW_FORM_ref_udata
:
10152 static unsigned int
10153 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10155 if (is_ref_attr (attr
))
10156 return DW_ADDR (attr
);
10158 complaint (&symfile_complaints
,
10159 _("unsupported die ref attribute form: '%s'"),
10160 dwarf_form_name (attr
->form
));
10164 /* Return the constant value held by the given attribute. Return -1
10165 if the value held by the attribute is not constant. */
10168 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10170 if (attr
->form
== DW_FORM_sdata
)
10171 return DW_SND (attr
);
10172 else if (attr
->form
== DW_FORM_udata
10173 || attr
->form
== DW_FORM_data1
10174 || attr
->form
== DW_FORM_data2
10175 || attr
->form
== DW_FORM_data4
10176 || attr
->form
== DW_FORM_data8
)
10177 return DW_UNSND (attr
);
10180 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10181 dwarf_form_name (attr
->form
));
10182 return default_value
;
10186 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10187 unit and add it to our queue.
10188 The result is non-zero if PER_CU was queued, otherwise the result is zero
10189 meaning either PER_CU is already queued or it is already loaded. */
10192 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10193 struct dwarf2_per_cu_data
*per_cu
)
10195 /* Mark the dependence relation so that we don't flush PER_CU
10197 dwarf2_add_dependence (this_cu
, per_cu
);
10199 /* If it's already on the queue, we have nothing to do. */
10200 if (per_cu
->queued
)
10203 /* If the compilation unit is already loaded, just mark it as
10205 if (per_cu
->cu
!= NULL
)
10207 per_cu
->cu
->last_used
= 0;
10211 /* Add it to the queue. */
10212 queue_comp_unit (per_cu
, this_cu
->objfile
);
10217 /* Follow reference or signature attribute ATTR of SRC_DIE.
10218 On entry *REF_CU is the CU of SRC_DIE.
10219 On exit *REF_CU is the CU of the result. */
10221 static struct die_info
*
10222 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10223 struct dwarf2_cu
**ref_cu
)
10225 struct die_info
*die
;
10227 if (is_ref_attr (attr
))
10228 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10229 else if (attr
->form
== DW_FORM_sig8
)
10230 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10233 dump_die_for_error (src_die
);
10234 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10235 (*ref_cu
)->objfile
->name
);
10241 /* Follow reference attribute ATTR of SRC_DIE.
10242 On entry *REF_CU is the CU of SRC_DIE.
10243 On exit *REF_CU is the CU of the result. */
10245 static struct die_info
*
10246 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10247 struct dwarf2_cu
**ref_cu
)
10249 struct die_info
*die
;
10250 unsigned int offset
;
10251 struct die_info temp_die
;
10252 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10254 gdb_assert (cu
->per_cu
!= NULL
);
10256 offset
= dwarf2_get_ref_die_offset (attr
);
10258 if (cu
->per_cu
->from_debug_types
)
10260 /* .debug_types CUs cannot reference anything outside their CU.
10261 If they need to, they have to reference a signatured type via
10263 if (! offset_in_cu_p (&cu
->header
, offset
))
10267 else if (! offset_in_cu_p (&cu
->header
, offset
))
10269 struct dwarf2_per_cu_data
*per_cu
;
10270 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10272 /* If necessary, add it to the queue and load its DIEs. */
10273 if (maybe_queue_comp_unit (cu
, per_cu
))
10274 load_full_comp_unit (per_cu
, cu
->objfile
);
10276 target_cu
= per_cu
->cu
;
10281 *ref_cu
= target_cu
;
10282 temp_die
.offset
= offset
;
10283 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10289 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10290 "at 0x%x [in module %s]"),
10291 offset
, src_die
->offset
, cu
->objfile
->name
);
10294 /* Follow the signature attribute ATTR in SRC_DIE.
10295 On entry *REF_CU is the CU of SRC_DIE.
10296 On exit *REF_CU is the CU of the result. */
10298 static struct die_info
*
10299 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10300 struct dwarf2_cu
**ref_cu
)
10302 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10303 struct die_info temp_die
;
10304 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10305 struct dwarf2_cu
*sig_cu
;
10306 struct die_info
*die
;
10308 /* sig_type will be NULL if the signatured type is missing from
10310 if (sig_type
== NULL
)
10311 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10312 "at 0x%x [in module %s]"),
10313 src_die
->offset
, objfile
->name
);
10315 /* If necessary, add it to the queue and load its DIEs. */
10317 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10318 read_signatured_type (objfile
, sig_type
);
10320 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10322 sig_cu
= sig_type
->per_cu
.cu
;
10323 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10324 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10331 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10332 "at 0x%x [in module %s]"),
10333 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10336 /* Given an offset of a signatured type, return its signatured_type. */
10338 static struct signatured_type
*
10339 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10341 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10342 unsigned int length
, initial_length_size
;
10343 unsigned int sig_offset
;
10344 struct signatured_type find_entry
, *type_sig
;
10346 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10347 sig_offset
= (initial_length_size
10349 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10350 + 1 /*address_size*/);
10351 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10352 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10354 /* This is only used to lookup previously recorded types.
10355 If we didn't find it, it's our bug. */
10356 gdb_assert (type_sig
!= NULL
);
10357 gdb_assert (offset
== type_sig
->offset
);
10362 /* Read in signatured type at OFFSET and build its CU and die(s). */
10365 read_signatured_type_at_offset (struct objfile
*objfile
,
10366 unsigned int offset
)
10368 struct signatured_type
*type_sig
;
10370 /* We have the section offset, but we need the signature to do the
10371 hash table lookup. */
10372 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10374 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10376 read_signatured_type (objfile
, type_sig
);
10378 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10381 /* Read in a signatured type and build its CU and DIEs. */
10384 read_signatured_type (struct objfile
*objfile
,
10385 struct signatured_type
*type_sig
)
10387 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10388 struct die_reader_specs reader_specs
;
10389 struct dwarf2_cu
*cu
;
10390 ULONGEST signature
;
10391 struct cleanup
*back_to
, *free_cu_cleanup
;
10392 struct attribute
*attr
;
10394 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10396 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10397 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10398 obstack_init (&cu
->comp_unit_obstack
);
10399 cu
->objfile
= objfile
;
10400 type_sig
->per_cu
.cu
= cu
;
10401 cu
->per_cu
= &type_sig
->per_cu
;
10403 /* If an error occurs while loading, release our storage. */
10404 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10406 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10407 types_ptr
, objfile
->obfd
);
10408 gdb_assert (signature
== type_sig
->signature
);
10411 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10415 &cu
->comp_unit_obstack
,
10416 hashtab_obstack_allocate
,
10417 dummy_obstack_deallocate
);
10419 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10420 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10422 init_cu_die_reader (&reader_specs
, cu
);
10424 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10427 /* We try not to read any attributes in this function, because not
10428 all objfiles needed for references have been loaded yet, and symbol
10429 table processing isn't initialized. But we have to set the CU language,
10430 or we won't be able to build types correctly. */
10431 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10433 set_cu_language (DW_UNSND (attr
), cu
);
10435 set_cu_language (language_minimal
, cu
);
10437 do_cleanups (back_to
);
10439 /* We've successfully allocated this compilation unit. Let our caller
10440 clean it up when finished with it. */
10441 discard_cleanups (free_cu_cleanup
);
10443 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10444 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10447 /* Decode simple location descriptions.
10448 Given a pointer to a dwarf block that defines a location, compute
10449 the location and return the value.
10451 NOTE drow/2003-11-18: This function is called in two situations
10452 now: for the address of static or global variables (partial symbols
10453 only) and for offsets into structures which are expected to be
10454 (more or less) constant. The partial symbol case should go away,
10455 and only the constant case should remain. That will let this
10456 function complain more accurately. A few special modes are allowed
10457 without complaint for global variables (for instance, global
10458 register values and thread-local values).
10460 A location description containing no operations indicates that the
10461 object is optimized out. The return value is 0 for that case.
10462 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10463 callers will only want a very basic result and this can become a
10466 Note that stack[0] is unused except as a default error return.
10467 Note that stack overflow is not yet handled. */
10470 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10472 struct objfile
*objfile
= cu
->objfile
;
10473 struct comp_unit_head
*cu_header
= &cu
->header
;
10475 int size
= blk
->size
;
10476 gdb_byte
*data
= blk
->data
;
10477 CORE_ADDR stack
[64];
10479 unsigned int bytes_read
, unsnd
;
10523 stack
[++stacki
] = op
- DW_OP_lit0
;
10558 stack
[++stacki
] = op
- DW_OP_reg0
;
10560 dwarf2_complex_location_expr_complaint ();
10564 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10566 stack
[++stacki
] = unsnd
;
10568 dwarf2_complex_location_expr_complaint ();
10572 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10577 case DW_OP_const1u
:
10578 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10582 case DW_OP_const1s
:
10583 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10587 case DW_OP_const2u
:
10588 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10592 case DW_OP_const2s
:
10593 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10597 case DW_OP_const4u
:
10598 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10602 case DW_OP_const4s
:
10603 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10608 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10614 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10619 stack
[stacki
+ 1] = stack
[stacki
];
10624 stack
[stacki
- 1] += stack
[stacki
];
10628 case DW_OP_plus_uconst
:
10629 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10634 stack
[stacki
- 1] -= stack
[stacki
];
10639 /* If we're not the last op, then we definitely can't encode
10640 this using GDB's address_class enum. This is valid for partial
10641 global symbols, although the variable's address will be bogus
10644 dwarf2_complex_location_expr_complaint ();
10647 case DW_OP_GNU_push_tls_address
:
10648 /* The top of the stack has the offset from the beginning
10649 of the thread control block at which the variable is located. */
10650 /* Nothing should follow this operator, so the top of stack would
10652 /* This is valid for partial global symbols, but the variable's
10653 address will be bogus in the psymtab. */
10655 dwarf2_complex_location_expr_complaint ();
10658 case DW_OP_GNU_uninit
:
10662 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
10663 dwarf_stack_op_name (op
));
10664 return (stack
[stacki
]);
10667 return (stack
[stacki
]);
10670 /* memory allocation interface */
10672 static struct dwarf_block
*
10673 dwarf_alloc_block (struct dwarf2_cu
*cu
)
10675 struct dwarf_block
*blk
;
10677 blk
= (struct dwarf_block
*)
10678 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
10682 static struct abbrev_info
*
10683 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
10685 struct abbrev_info
*abbrev
;
10687 abbrev
= (struct abbrev_info
*)
10688 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
10689 memset (abbrev
, 0, sizeof (struct abbrev_info
));
10693 static struct die_info
*
10694 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
10696 struct die_info
*die
;
10697 size_t size
= sizeof (struct die_info
);
10700 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
10702 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
10703 memset (die
, 0, sizeof (struct die_info
));
10708 /* Macro support. */
10711 /* Return the full name of file number I in *LH's file name table.
10712 Use COMP_DIR as the name of the current directory of the
10713 compilation. The result is allocated using xmalloc; the caller is
10714 responsible for freeing it. */
10716 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
10718 /* Is the file number a valid index into the line header's file name
10719 table? Remember that file numbers start with one, not zero. */
10720 if (1 <= file
&& file
<= lh
->num_file_names
)
10722 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10724 if (IS_ABSOLUTE_PATH (fe
->name
))
10725 return xstrdup (fe
->name
);
10733 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10739 dir_len
= strlen (dir
);
10740 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
10741 strcpy (full_name
, dir
);
10742 full_name
[dir_len
] = '/';
10743 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
10747 return xstrdup (fe
->name
);
10752 /* The compiler produced a bogus file number. We can at least
10753 record the macro definitions made in the file, even if we
10754 won't be able to find the file by name. */
10755 char fake_name
[80];
10756 sprintf (fake_name
, "<bad macro file number %d>", file
);
10758 complaint (&symfile_complaints
,
10759 _("bad file number in macro information (%d)"),
10762 return xstrdup (fake_name
);
10767 static struct macro_source_file
*
10768 macro_start_file (int file
, int line
,
10769 struct macro_source_file
*current_file
,
10770 const char *comp_dir
,
10771 struct line_header
*lh
, struct objfile
*objfile
)
10773 /* The full name of this source file. */
10774 char *full_name
= file_full_name (file
, lh
, comp_dir
);
10776 /* We don't create a macro table for this compilation unit
10777 at all until we actually get a filename. */
10778 if (! pending_macros
)
10779 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
10780 objfile
->macro_cache
);
10782 if (! current_file
)
10783 /* If we have no current file, then this must be the start_file
10784 directive for the compilation unit's main source file. */
10785 current_file
= macro_set_main (pending_macros
, full_name
);
10787 current_file
= macro_include (current_file
, line
, full_name
);
10791 return current_file
;
10795 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10796 followed by a null byte. */
10798 copy_string (const char *buf
, int len
)
10800 char *s
= xmalloc (len
+ 1);
10801 memcpy (s
, buf
, len
);
10808 static const char *
10809 consume_improper_spaces (const char *p
, const char *body
)
10813 complaint (&symfile_complaints
,
10814 _("macro definition contains spaces in formal argument list:\n`%s'"),
10826 parse_macro_definition (struct macro_source_file
*file
, int line
,
10831 /* The body string takes one of two forms. For object-like macro
10832 definitions, it should be:
10834 <macro name> " " <definition>
10836 For function-like macro definitions, it should be:
10838 <macro name> "() " <definition>
10840 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10842 Spaces may appear only where explicitly indicated, and in the
10845 The Dwarf 2 spec says that an object-like macro's name is always
10846 followed by a space, but versions of GCC around March 2002 omit
10847 the space when the macro's definition is the empty string.
10849 The Dwarf 2 spec says that there should be no spaces between the
10850 formal arguments in a function-like macro's formal argument list,
10851 but versions of GCC around March 2002 include spaces after the
10855 /* Find the extent of the macro name. The macro name is terminated
10856 by either a space or null character (for an object-like macro) or
10857 an opening paren (for a function-like macro). */
10858 for (p
= body
; *p
; p
++)
10859 if (*p
== ' ' || *p
== '(')
10862 if (*p
== ' ' || *p
== '\0')
10864 /* It's an object-like macro. */
10865 int name_len
= p
- body
;
10866 char *name
= copy_string (body
, name_len
);
10867 const char *replacement
;
10870 replacement
= body
+ name_len
+ 1;
10873 dwarf2_macro_malformed_definition_complaint (body
);
10874 replacement
= body
+ name_len
;
10877 macro_define_object (file
, line
, name
, replacement
);
10881 else if (*p
== '(')
10883 /* It's a function-like macro. */
10884 char *name
= copy_string (body
, p
- body
);
10887 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
10891 p
= consume_improper_spaces (p
, body
);
10893 /* Parse the formal argument list. */
10894 while (*p
&& *p
!= ')')
10896 /* Find the extent of the current argument name. */
10897 const char *arg_start
= p
;
10899 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
10902 if (! *p
|| p
== arg_start
)
10903 dwarf2_macro_malformed_definition_complaint (body
);
10906 /* Make sure argv has room for the new argument. */
10907 if (argc
>= argv_size
)
10910 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
10913 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
10916 p
= consume_improper_spaces (p
, body
);
10918 /* Consume the comma, if present. */
10923 p
= consume_improper_spaces (p
, body
);
10932 /* Perfectly formed definition, no complaints. */
10933 macro_define_function (file
, line
, name
,
10934 argc
, (const char **) argv
,
10936 else if (*p
== '\0')
10938 /* Complain, but do define it. */
10939 dwarf2_macro_malformed_definition_complaint (body
);
10940 macro_define_function (file
, line
, name
,
10941 argc
, (const char **) argv
,
10945 /* Just complain. */
10946 dwarf2_macro_malformed_definition_complaint (body
);
10949 /* Just complain. */
10950 dwarf2_macro_malformed_definition_complaint (body
);
10956 for (i
= 0; i
< argc
; i
++)
10962 dwarf2_macro_malformed_definition_complaint (body
);
10967 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
10968 char *comp_dir
, bfd
*abfd
,
10969 struct dwarf2_cu
*cu
)
10971 gdb_byte
*mac_ptr
, *mac_end
;
10972 struct macro_source_file
*current_file
= 0;
10973 enum dwarf_macinfo_record_type macinfo_type
;
10974 int at_commandline
;
10976 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
10978 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
10982 /* First pass: Find the name of the base filename.
10983 This filename is needed in order to process all macros whose definition
10984 (or undefinition) comes from the command line. These macros are defined
10985 before the first DW_MACINFO_start_file entry, and yet still need to be
10986 associated to the base file.
10988 To determine the base file name, we scan the macro definitions until we
10989 reach the first DW_MACINFO_start_file entry. We then initialize
10990 CURRENT_FILE accordingly so that any macro definition found before the
10991 first DW_MACINFO_start_file can still be associated to the base file. */
10993 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
10994 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
10995 + dwarf2_per_objfile
->macinfo
.size
;
10999 /* Do we at least have room for a macinfo type byte? */
11000 if (mac_ptr
>= mac_end
)
11002 /* Complaint is printed during the second pass as GDB will probably
11003 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11007 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11010 switch (macinfo_type
)
11012 /* A zero macinfo type indicates the end of the macro
11017 case DW_MACINFO_define
:
11018 case DW_MACINFO_undef
:
11019 /* Only skip the data by MAC_PTR. */
11021 unsigned int bytes_read
;
11023 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11024 mac_ptr
+= bytes_read
;
11025 read_string (abfd
, mac_ptr
, &bytes_read
);
11026 mac_ptr
+= bytes_read
;
11030 case DW_MACINFO_start_file
:
11032 unsigned int bytes_read
;
11035 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11036 mac_ptr
+= bytes_read
;
11037 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11038 mac_ptr
+= bytes_read
;
11040 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11045 case DW_MACINFO_end_file
:
11046 /* No data to skip by MAC_PTR. */
11049 case DW_MACINFO_vendor_ext
:
11050 /* Only skip the data by MAC_PTR. */
11052 unsigned int bytes_read
;
11054 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11055 mac_ptr
+= bytes_read
;
11056 read_string (abfd
, mac_ptr
, &bytes_read
);
11057 mac_ptr
+= bytes_read
;
11064 } while (macinfo_type
!= 0 && current_file
== NULL
);
11066 /* Second pass: Process all entries.
11068 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11069 command-line macro definitions/undefinitions. This flag is unset when we
11070 reach the first DW_MACINFO_start_file entry. */
11072 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11074 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11075 GDB is still reading the definitions from command line. First
11076 DW_MACINFO_start_file will need to be ignored as it was already executed
11077 to create CURRENT_FILE for the main source holding also the command line
11078 definitions. On first met DW_MACINFO_start_file this flag is reset to
11079 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11081 at_commandline
= 1;
11085 /* Do we at least have room for a macinfo type byte? */
11086 if (mac_ptr
>= mac_end
)
11088 dwarf2_macros_too_long_complaint ();
11092 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11095 switch (macinfo_type
)
11097 /* A zero macinfo type indicates the end of the macro
11102 case DW_MACINFO_define
:
11103 case DW_MACINFO_undef
:
11105 unsigned int bytes_read
;
11109 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11110 mac_ptr
+= bytes_read
;
11111 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11112 mac_ptr
+= bytes_read
;
11114 if (! current_file
)
11116 /* DWARF violation as no main source is present. */
11117 complaint (&symfile_complaints
,
11118 _("debug info with no main source gives macro %s "
11120 macinfo_type
== DW_MACINFO_define
?
11122 macinfo_type
== DW_MACINFO_undef
?
11123 _("undefinition") :
11124 _("something-or-other"), line
, body
);
11127 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11128 complaint (&symfile_complaints
,
11129 _("debug info gives %s macro %s with %s line %d: %s"),
11130 at_commandline
? _("command-line") : _("in-file"),
11131 macinfo_type
== DW_MACINFO_define
?
11133 macinfo_type
== DW_MACINFO_undef
?
11134 _("undefinition") :
11135 _("something-or-other"),
11136 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11138 if (macinfo_type
== DW_MACINFO_define
)
11139 parse_macro_definition (current_file
, line
, body
);
11140 else if (macinfo_type
== DW_MACINFO_undef
)
11141 macro_undef (current_file
, line
, body
);
11145 case DW_MACINFO_start_file
:
11147 unsigned int bytes_read
;
11150 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11151 mac_ptr
+= bytes_read
;
11152 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11153 mac_ptr
+= bytes_read
;
11155 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11156 complaint (&symfile_complaints
,
11157 _("debug info gives source %d included "
11158 "from %s at %s line %d"),
11159 file
, at_commandline
? _("command-line") : _("file"),
11160 line
== 0 ? _("zero") : _("non-zero"), line
);
11162 if (at_commandline
)
11164 /* This DW_MACINFO_start_file was executed in the pass one. */
11165 at_commandline
= 0;
11168 current_file
= macro_start_file (file
, line
,
11169 current_file
, comp_dir
,
11174 case DW_MACINFO_end_file
:
11175 if (! current_file
)
11176 complaint (&symfile_complaints
,
11177 _("macro debug info has an unmatched `close_file' directive"));
11180 current_file
= current_file
->included_by
;
11181 if (! current_file
)
11183 enum dwarf_macinfo_record_type next_type
;
11185 /* GCC circa March 2002 doesn't produce the zero
11186 type byte marking the end of the compilation
11187 unit. Complain if it's not there, but exit no
11190 /* Do we at least have room for a macinfo type byte? */
11191 if (mac_ptr
>= mac_end
)
11193 dwarf2_macros_too_long_complaint ();
11197 /* We don't increment mac_ptr here, so this is just
11199 next_type
= read_1_byte (abfd
, mac_ptr
);
11200 if (next_type
!= 0)
11201 complaint (&symfile_complaints
,
11202 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11209 case DW_MACINFO_vendor_ext
:
11211 unsigned int bytes_read
;
11215 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11216 mac_ptr
+= bytes_read
;
11217 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11218 mac_ptr
+= bytes_read
;
11220 /* We don't recognize any vendor extensions. */
11224 } while (macinfo_type
!= 0);
11227 /* Check if the attribute's form is a DW_FORM_block*
11228 if so return true else false. */
11230 attr_form_is_block (struct attribute
*attr
)
11232 return (attr
== NULL
? 0 :
11233 attr
->form
== DW_FORM_block1
11234 || attr
->form
== DW_FORM_block2
11235 || attr
->form
== DW_FORM_block4
11236 || attr
->form
== DW_FORM_block
);
11239 /* Return non-zero if ATTR's value is a section offset --- classes
11240 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11241 You may use DW_UNSND (attr) to retrieve such offsets.
11243 Section 7.5.4, "Attribute Encodings", explains that no attribute
11244 may have a value that belongs to more than one of these classes; it
11245 would be ambiguous if we did, because we use the same forms for all
11248 attr_form_is_section_offset (struct attribute
*attr
)
11250 return (attr
->form
== DW_FORM_data4
11251 || attr
->form
== DW_FORM_data8
);
11255 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11256 zero otherwise. When this function returns true, you can apply
11257 dwarf2_get_attr_constant_value to it.
11259 However, note that for some attributes you must check
11260 attr_form_is_section_offset before using this test. DW_FORM_data4
11261 and DW_FORM_data8 are members of both the constant class, and of
11262 the classes that contain offsets into other debug sections
11263 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11264 that, if an attribute's can be either a constant or one of the
11265 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11266 taken as section offsets, not constants. */
11268 attr_form_is_constant (struct attribute
*attr
)
11270 switch (attr
->form
)
11272 case DW_FORM_sdata
:
11273 case DW_FORM_udata
:
11274 case DW_FORM_data1
:
11275 case DW_FORM_data2
:
11276 case DW_FORM_data4
:
11277 case DW_FORM_data8
:
11285 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11286 struct dwarf2_cu
*cu
)
11288 if (attr_form_is_section_offset (attr
)
11289 /* ".debug_loc" may not exist at all, or the offset may be outside
11290 the section. If so, fall through to the complaint in the
11292 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11294 struct dwarf2_loclist_baton
*baton
;
11296 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11297 sizeof (struct dwarf2_loclist_baton
));
11298 baton
->per_cu
= cu
->per_cu
;
11299 gdb_assert (baton
->per_cu
);
11301 /* We don't know how long the location list is, but make sure we
11302 don't run off the edge of the section. */
11303 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11304 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11305 baton
->base_address
= cu
->base_address
;
11306 if (cu
->base_known
== 0)
11307 complaint (&symfile_complaints
,
11308 _("Location list used without specifying the CU base address."));
11310 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11311 SYMBOL_LOCATION_BATON (sym
) = baton
;
11315 struct dwarf2_locexpr_baton
*baton
;
11317 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11318 sizeof (struct dwarf2_locexpr_baton
));
11319 baton
->per_cu
= cu
->per_cu
;
11320 gdb_assert (baton
->per_cu
);
11322 if (attr_form_is_block (attr
))
11324 /* Note that we're just copying the block's data pointer
11325 here, not the actual data. We're still pointing into the
11326 info_buffer for SYM's objfile; right now we never release
11327 that buffer, but when we do clean up properly this may
11329 baton
->size
= DW_BLOCK (attr
)->size
;
11330 baton
->data
= DW_BLOCK (attr
)->data
;
11334 dwarf2_invalid_attrib_class_complaint ("location description",
11335 SYMBOL_NATURAL_NAME (sym
));
11337 baton
->data
= NULL
;
11340 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11341 SYMBOL_LOCATION_BATON (sym
) = baton
;
11345 /* Return the OBJFILE associated with the compilation unit CU. */
11348 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11350 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11352 /* Return the master objfile, so that we can report and look up the
11353 correct file containing this variable. */
11354 if (objfile
->separate_debug_objfile_backlink
)
11355 objfile
= objfile
->separate_debug_objfile_backlink
;
11360 /* Return the address size given in the compilation unit header for CU. */
11363 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11366 return per_cu
->cu
->header
.addr_size
;
11369 /* If the CU is not currently read in, we re-read its header. */
11370 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11371 struct dwarf2_per_objfile
*per_objfile
11372 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11373 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11375 struct comp_unit_head cu_header
;
11376 memset (&cu_header
, 0, sizeof cu_header
);
11377 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11378 return cu_header
.addr_size
;
11382 /* Locate the .debug_info compilation unit from CU's objfile which contains
11383 the DIE at OFFSET. Raises an error on failure. */
11385 static struct dwarf2_per_cu_data
*
11386 dwarf2_find_containing_comp_unit (unsigned int offset
,
11387 struct objfile
*objfile
)
11389 struct dwarf2_per_cu_data
*this_cu
;
11393 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11396 int mid
= low
+ (high
- low
) / 2;
11397 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11402 gdb_assert (low
== high
);
11403 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11406 error (_("Dwarf Error: could not find partial DIE containing "
11407 "offset 0x%lx [in module %s]"),
11408 (long) offset
, bfd_get_filename (objfile
->obfd
));
11410 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11411 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11415 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11416 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11417 && offset
>= this_cu
->offset
+ this_cu
->length
)
11418 error (_("invalid dwarf2 offset %u"), offset
);
11419 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11424 /* Locate the compilation unit from OBJFILE which is located at exactly
11425 OFFSET. Raises an error on failure. */
11427 static struct dwarf2_per_cu_data
*
11428 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11430 struct dwarf2_per_cu_data
*this_cu
;
11431 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11432 if (this_cu
->offset
!= offset
)
11433 error (_("no compilation unit with offset %u."), offset
);
11437 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11439 static struct dwarf2_cu
*
11440 alloc_one_comp_unit (struct objfile
*objfile
)
11442 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11443 cu
->objfile
= objfile
;
11444 obstack_init (&cu
->comp_unit_obstack
);
11448 /* Release one cached compilation unit, CU. We unlink it from the tree
11449 of compilation units, but we don't remove it from the read_in_chain;
11450 the caller is responsible for that.
11451 NOTE: DATA is a void * because this function is also used as a
11452 cleanup routine. */
11455 free_one_comp_unit (void *data
)
11457 struct dwarf2_cu
*cu
= data
;
11459 if (cu
->per_cu
!= NULL
)
11460 cu
->per_cu
->cu
= NULL
;
11463 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11468 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11469 when we're finished with it. We can't free the pointer itself, but be
11470 sure to unlink it from the cache. Also release any associated storage
11471 and perform cache maintenance.
11473 Only used during partial symbol parsing. */
11476 free_stack_comp_unit (void *data
)
11478 struct dwarf2_cu
*cu
= data
;
11480 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11481 cu
->partial_dies
= NULL
;
11483 if (cu
->per_cu
!= NULL
)
11485 /* This compilation unit is on the stack in our caller, so we
11486 should not xfree it. Just unlink it. */
11487 cu
->per_cu
->cu
= NULL
;
11490 /* If we had a per-cu pointer, then we may have other compilation
11491 units loaded, so age them now. */
11492 age_cached_comp_units ();
11496 /* Free all cached compilation units. */
11499 free_cached_comp_units (void *data
)
11501 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11503 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11504 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11505 while (per_cu
!= NULL
)
11507 struct dwarf2_per_cu_data
*next_cu
;
11509 next_cu
= per_cu
->cu
->read_in_chain
;
11511 free_one_comp_unit (per_cu
->cu
);
11512 *last_chain
= next_cu
;
11518 /* Increase the age counter on each cached compilation unit, and free
11519 any that are too old. */
11522 age_cached_comp_units (void)
11524 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11526 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11527 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11528 while (per_cu
!= NULL
)
11530 per_cu
->cu
->last_used
++;
11531 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11532 dwarf2_mark (per_cu
->cu
);
11533 per_cu
= per_cu
->cu
->read_in_chain
;
11536 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11537 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11538 while (per_cu
!= NULL
)
11540 struct dwarf2_per_cu_data
*next_cu
;
11542 next_cu
= per_cu
->cu
->read_in_chain
;
11544 if (!per_cu
->cu
->mark
)
11546 free_one_comp_unit (per_cu
->cu
);
11547 *last_chain
= next_cu
;
11550 last_chain
= &per_cu
->cu
->read_in_chain
;
11556 /* Remove a single compilation unit from the cache. */
11559 free_one_cached_comp_unit (void *target_cu
)
11561 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11563 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11564 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11565 while (per_cu
!= NULL
)
11567 struct dwarf2_per_cu_data
*next_cu
;
11569 next_cu
= per_cu
->cu
->read_in_chain
;
11571 if (per_cu
->cu
== target_cu
)
11573 free_one_comp_unit (per_cu
->cu
);
11574 *last_chain
= next_cu
;
11578 last_chain
= &per_cu
->cu
->read_in_chain
;
11584 /* Release all extra memory associated with OBJFILE. */
11587 dwarf2_free_objfile (struct objfile
*objfile
)
11589 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11591 if (dwarf2_per_objfile
== NULL
)
11594 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11595 free_cached_comp_units (NULL
);
11597 /* Everything else should be on the objfile obstack. */
11600 /* A pair of DIE offset and GDB type pointer. We store these
11601 in a hash table separate from the DIEs, and preserve them
11602 when the DIEs are flushed out of cache. */
11604 struct dwarf2_offset_and_type
11606 unsigned int offset
;
11610 /* Hash function for a dwarf2_offset_and_type. */
11613 offset_and_type_hash (const void *item
)
11615 const struct dwarf2_offset_and_type
*ofs
= item
;
11616 return ofs
->offset
;
11619 /* Equality function for a dwarf2_offset_and_type. */
11622 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11624 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11625 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11626 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11629 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11630 table if necessary. For convenience, return TYPE. */
11632 static struct type
*
11633 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11635 struct dwarf2_offset_and_type
**slot
, ofs
;
11637 if (cu
->type_hash
== NULL
)
11639 gdb_assert (cu
->per_cu
!= NULL
);
11640 cu
->per_cu
->type_hash
11641 = htab_create_alloc_ex (cu
->header
.length
/ 24,
11642 offset_and_type_hash
,
11643 offset_and_type_eq
,
11645 &cu
->objfile
->objfile_obstack
,
11646 hashtab_obstack_allocate
,
11647 dummy_obstack_deallocate
);
11648 cu
->type_hash
= cu
->per_cu
->type_hash
;
11651 ofs
.offset
= die
->offset
;
11653 slot
= (struct dwarf2_offset_and_type
**)
11654 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
11655 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
11660 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11661 not have a saved type. */
11663 static struct type
*
11664 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11666 struct dwarf2_offset_and_type
*slot
, ofs
;
11667 htab_t type_hash
= cu
->type_hash
;
11669 if (type_hash
== NULL
)
11672 ofs
.offset
= die
->offset
;
11673 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
11680 /* Add a dependence relationship from CU to REF_PER_CU. */
11683 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
11684 struct dwarf2_per_cu_data
*ref_per_cu
)
11688 if (cu
->dependencies
== NULL
)
11690 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
11691 NULL
, &cu
->comp_unit_obstack
,
11692 hashtab_obstack_allocate
,
11693 dummy_obstack_deallocate
);
11695 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
11697 *slot
= ref_per_cu
;
11700 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11701 Set the mark field in every compilation unit in the
11702 cache that we must keep because we are keeping CU. */
11705 dwarf2_mark_helper (void **slot
, void *data
)
11707 struct dwarf2_per_cu_data
*per_cu
;
11709 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
11710 if (per_cu
->cu
->mark
)
11712 per_cu
->cu
->mark
= 1;
11714 if (per_cu
->cu
->dependencies
!= NULL
)
11715 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11720 /* Set the mark field in CU and in every other compilation unit in the
11721 cache that we must keep because we are keeping CU. */
11724 dwarf2_mark (struct dwarf2_cu
*cu
)
11729 if (cu
->dependencies
!= NULL
)
11730 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11734 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
11738 per_cu
->cu
->mark
= 0;
11739 per_cu
= per_cu
->cu
->read_in_chain
;
11743 /* Trivial hash function for partial_die_info: the hash value of a DIE
11744 is its offset in .debug_info for this objfile. */
11747 partial_die_hash (const void *item
)
11749 const struct partial_die_info
*part_die
= item
;
11750 return part_die
->offset
;
11753 /* Trivial comparison function for partial_die_info structures: two DIEs
11754 are equal if they have the same offset. */
11757 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
11759 const struct partial_die_info
*part_die_lhs
= item_lhs
;
11760 const struct partial_die_info
*part_die_rhs
= item_rhs
;
11761 return part_die_lhs
->offset
== part_die_rhs
->offset
;
11764 static struct cmd_list_element
*set_dwarf2_cmdlist
;
11765 static struct cmd_list_element
*show_dwarf2_cmdlist
;
11768 set_dwarf2_cmd (char *args
, int from_tty
)
11770 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
11774 show_dwarf2_cmd (char *args
, int from_tty
)
11776 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
11779 /* If section described by INFO was mmapped, munmap it now. */
11782 munmap_section_buffer (struct dwarf2_section_info
*info
)
11784 if (info
->was_mmapped
)
11787 intptr_t begin
= (intptr_t) info
->buffer
;
11788 intptr_t map_begin
= begin
& ~(pagesize
- 1);
11789 size_t map_length
= info
->size
+ begin
- map_begin
;
11790 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
11792 /* Without HAVE_MMAP, we should never be here to begin with. */
11798 /* munmap debug sections for OBJFILE, if necessary. */
11801 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
11803 struct dwarf2_per_objfile
*data
= d
;
11804 munmap_section_buffer (&data
->info
);
11805 munmap_section_buffer (&data
->abbrev
);
11806 munmap_section_buffer (&data
->line
);
11807 munmap_section_buffer (&data
->str
);
11808 munmap_section_buffer (&data
->macinfo
);
11809 munmap_section_buffer (&data
->ranges
);
11810 munmap_section_buffer (&data
->loc
);
11811 munmap_section_buffer (&data
->frame
);
11812 munmap_section_buffer (&data
->eh_frame
);
11815 void _initialize_dwarf2_read (void);
11818 _initialize_dwarf2_read (void)
11820 dwarf2_objfile_data_key
11821 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
11823 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
11824 Set DWARF 2 specific variables.\n\
11825 Configure DWARF 2 variables such as the cache size"),
11826 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
11827 0/*allow-unknown*/, &maintenance_set_cmdlist
);
11829 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
11830 Show DWARF 2 specific variables\n\
11831 Show DWARF 2 variables such as the cache size"),
11832 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
11833 0/*allow-unknown*/, &maintenance_show_cmdlist
);
11835 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
11836 &dwarf2_max_cache_age
, _("\
11837 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
11838 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
11839 A higher limit means that cached compilation units will be stored\n\
11840 in memory longer, and more total memory will be used. Zero disables\n\
11841 caching, which can slow down startup."),
11843 show_dwarf2_max_cache_age
,
11844 &set_dwarf2_cmdlist
,
11845 &show_dwarf2_cmdlist
);
11847 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
11848 Set debugging of the dwarf2 DIE reader."), _("\
11849 Show debugging of the dwarf2 DIE reader."), _("\
11850 When enabled (non-zero), DIEs are dumped after they are read in.\n\
11851 The value is the maximum depth to print."),
11854 &setdebuglist
, &showdebuglist
);