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 const char *imported_name
;
3376 const char *imported_name_prefix
;
3377 const char *import_prefix
;
3378 char *canonical_name
;
3380 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3381 if (import_attr
== NULL
)
3383 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3384 dwarf_tag_name (die
->tag
));
3388 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &cu
);
3389 imported_name
= dwarf2_name (imported_die
, cu
);
3390 if (imported_name
== NULL
)
3392 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3394 The import in the following code:
3408 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3409 <52> DW_AT_decl_file : 1
3410 <53> DW_AT_decl_line : 6
3411 <54> DW_AT_import : <0x75>
3412 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3414 <5b> DW_AT_decl_file : 1
3415 <5c> DW_AT_decl_line : 2
3416 <5d> DW_AT_type : <0x6e>
3418 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3419 <76> DW_AT_byte_size : 4
3420 <77> DW_AT_encoding : 5 (signed)
3422 imports the wrong die ( 0x75 instead of 0x58 ).
3423 This case will be ignored until the gcc bug is fixed. */
3427 /* FIXME: dwarf2_name (die); for the local name after import. */
3429 /* Figure out where the statement is being imported to. */
3430 import_prefix
= determine_prefix (die
, cu
);
3432 /* Figure out what the scope of the imported die is and prepend it
3433 to the name of the imported die. */
3434 imported_name_prefix
= determine_prefix (imported_die
, cu
);
3436 if (strlen (imported_name_prefix
) > 0)
3438 canonical_name
= alloca (strlen (imported_name_prefix
) + 2 + strlen (imported_name
) + 1);
3439 strcpy (canonical_name
, imported_name_prefix
);
3440 strcat (canonical_name
, "::");
3441 strcat (canonical_name
, imported_name
);
3445 canonical_name
= alloca (strlen (imported_name
) + 1);
3446 strcpy (canonical_name
, imported_name
);
3449 using_directives
= cp_add_using (import_prefix
,canonical_name
, using_directives
);
3453 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3455 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3459 free_cu_line_header (void *arg
)
3461 struct dwarf2_cu
*cu
= arg
;
3463 free_line_header (cu
->line_header
);
3464 cu
->line_header
= NULL
;
3468 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3470 struct objfile
*objfile
= cu
->objfile
;
3471 struct comp_unit_head
*cu_header
= &cu
->header
;
3472 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3473 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3474 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3475 struct attribute
*attr
;
3477 char *comp_dir
= NULL
;
3478 struct die_info
*child_die
;
3479 bfd
*abfd
= objfile
->obfd
;
3480 struct line_header
*line_header
= 0;
3483 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3485 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3487 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3488 from finish_block. */
3489 if (lowpc
== ((CORE_ADDR
) -1))
3494 /* Find the filename. Do not use dwarf2_name here, since the filename
3495 is not a source language identifier. */
3496 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3499 name
= DW_STRING (attr
);
3502 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3504 comp_dir
= DW_STRING (attr
);
3505 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3507 comp_dir
= ldirname (name
);
3508 if (comp_dir
!= NULL
)
3509 make_cleanup (xfree
, comp_dir
);
3511 if (comp_dir
!= NULL
)
3513 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3514 directory, get rid of it. */
3515 char *cp
= strchr (comp_dir
, ':');
3517 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3524 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3527 set_cu_language (DW_UNSND (attr
), cu
);
3530 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3532 cu
->producer
= DW_STRING (attr
);
3534 /* We assume that we're processing GCC output. */
3535 processing_gcc_compilation
= 2;
3537 processing_has_namespace_info
= 0;
3539 start_symtab (name
, comp_dir
, lowpc
);
3540 record_debugformat ("DWARF 2");
3541 record_producer (cu
->producer
);
3543 initialize_cu_func_list (cu
);
3545 /* Decode line number information if present. We do this before
3546 processing child DIEs, so that the line header table is available
3547 for DW_AT_decl_file. */
3548 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3551 unsigned int line_offset
= DW_UNSND (attr
);
3552 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3555 cu
->line_header
= line_header
;
3556 make_cleanup (free_cu_line_header
, cu
);
3557 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3561 /* Process all dies in compilation unit. */
3562 if (die
->child
!= NULL
)
3564 child_die
= die
->child
;
3565 while (child_die
&& child_die
->tag
)
3567 process_die (child_die
, cu
);
3568 child_die
= sibling_die (child_die
);
3572 /* Decode macro information, if present. Dwarf 2 macro information
3573 refers to information in the line number info statement program
3574 header, so we can only read it if we've read the header
3576 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3577 if (attr
&& line_header
)
3579 unsigned int macro_offset
= DW_UNSND (attr
);
3580 dwarf_decode_macros (line_header
, macro_offset
,
3581 comp_dir
, abfd
, cu
);
3583 do_cleanups (back_to
);
3586 /* For TUs we want to skip the first top level sibling if it's not the
3587 actual type being defined by this TU. In this case the first top
3588 level sibling is there to provide context only. */
3591 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3593 struct objfile
*objfile
= cu
->objfile
;
3594 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3596 struct attribute
*attr
;
3598 char *comp_dir
= NULL
;
3599 struct die_info
*child_die
;
3600 bfd
*abfd
= objfile
->obfd
;
3601 struct line_header
*line_header
= 0;
3603 /* start_symtab needs a low pc, but we don't really have one.
3604 Do what read_file_scope would do in the absence of such info. */
3605 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3607 /* Find the filename. Do not use dwarf2_name here, since the filename
3608 is not a source language identifier. */
3609 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3611 name
= DW_STRING (attr
);
3613 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3615 comp_dir
= DW_STRING (attr
);
3616 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3618 comp_dir
= ldirname (name
);
3619 if (comp_dir
!= NULL
)
3620 make_cleanup (xfree
, comp_dir
);
3626 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3628 set_cu_language (DW_UNSND (attr
), cu
);
3630 /* This isn't technically needed today. It is done for symmetry
3631 with read_file_scope. */
3632 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3634 cu
->producer
= DW_STRING (attr
);
3636 /* We assume that we're processing GCC output. */
3637 processing_gcc_compilation
= 2;
3639 processing_has_namespace_info
= 0;
3641 start_symtab (name
, comp_dir
, lowpc
);
3642 record_debugformat ("DWARF 2");
3643 record_producer (cu
->producer
);
3645 /* Process the dies in the type unit. */
3646 if (die
->child
== NULL
)
3648 dump_die_for_error (die
);
3649 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3650 bfd_get_filename (abfd
));
3653 child_die
= die
->child
;
3655 while (child_die
&& child_die
->tag
)
3657 process_die (child_die
, cu
);
3659 child_die
= sibling_die (child_die
);
3662 do_cleanups (back_to
);
3666 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3667 struct dwarf2_cu
*cu
)
3669 struct function_range
*thisfn
;
3671 thisfn
= (struct function_range
*)
3672 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3673 thisfn
->name
= name
;
3674 thisfn
->lowpc
= lowpc
;
3675 thisfn
->highpc
= highpc
;
3676 thisfn
->seen_line
= 0;
3677 thisfn
->next
= NULL
;
3679 if (cu
->last_fn
== NULL
)
3680 cu
->first_fn
= thisfn
;
3682 cu
->last_fn
->next
= thisfn
;
3684 cu
->last_fn
= thisfn
;
3687 /* qsort helper for inherit_abstract_dies. */
3690 unsigned_int_compar (const void *ap
, const void *bp
)
3692 unsigned int a
= *(unsigned int *) ap
;
3693 unsigned int b
= *(unsigned int *) bp
;
3695 return (a
> b
) - (b
> a
);
3698 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3699 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3700 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3703 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3705 struct die_info
*child_die
;
3706 unsigned die_children_count
;
3707 /* CU offsets which were referenced by children of the current DIE. */
3709 unsigned *offsets_end
, *offsetp
;
3710 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3711 struct die_info
*origin_die
;
3712 /* Iterator of the ORIGIN_DIE children. */
3713 struct die_info
*origin_child_die
;
3714 struct cleanup
*cleanups
;
3715 struct attribute
*attr
;
3717 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3721 origin_die
= follow_die_ref (die
, attr
, &cu
);
3722 if (die
->tag
!= origin_die
->tag
3723 && !(die
->tag
== DW_TAG_inlined_subroutine
3724 && origin_die
->tag
== DW_TAG_subprogram
))
3725 complaint (&symfile_complaints
,
3726 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3727 die
->offset
, origin_die
->offset
);
3729 child_die
= die
->child
;
3730 die_children_count
= 0;
3731 while (child_die
&& child_die
->tag
)
3733 child_die
= sibling_die (child_die
);
3734 die_children_count
++;
3736 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3737 cleanups
= make_cleanup (xfree
, offsets
);
3739 offsets_end
= offsets
;
3740 child_die
= die
->child
;
3741 while (child_die
&& child_die
->tag
)
3743 /* For each CHILD_DIE, find the corresponding child of
3744 ORIGIN_DIE. If there is more than one layer of
3745 DW_AT_abstract_origin, follow them all; there shouldn't be,
3746 but GCC versions at least through 4.4 generate this (GCC PR
3748 struct die_info
*child_origin_die
= child_die
;
3751 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3754 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3757 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3758 counterpart may exist. */
3759 if (child_origin_die
!= child_die
)
3761 if (child_die
->tag
!= child_origin_die
->tag
3762 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3763 && child_origin_die
->tag
== DW_TAG_subprogram
))
3764 complaint (&symfile_complaints
,
3765 _("Child DIE 0x%x and its abstract origin 0x%x have "
3766 "different tags"), child_die
->offset
,
3767 child_origin_die
->offset
);
3768 if (child_origin_die
->parent
!= origin_die
)
3769 complaint (&symfile_complaints
,
3770 _("Child DIE 0x%x and its abstract origin 0x%x have "
3771 "different parents"), child_die
->offset
,
3772 child_origin_die
->offset
);
3774 *offsets_end
++ = child_origin_die
->offset
;
3776 child_die
= sibling_die (child_die
);
3778 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3779 unsigned_int_compar
);
3780 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3781 if (offsetp
[-1] == *offsetp
)
3782 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3783 "to DIE 0x%x as their abstract origin"),
3784 die
->offset
, *offsetp
);
3787 origin_child_die
= origin_die
->child
;
3788 while (origin_child_die
&& origin_child_die
->tag
)
3790 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3791 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3793 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3795 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3796 process_die (origin_child_die
, cu
);
3798 origin_child_die
= sibling_die (origin_child_die
);
3801 do_cleanups (cleanups
);
3805 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3807 struct objfile
*objfile
= cu
->objfile
;
3808 struct context_stack
*new;
3811 struct die_info
*child_die
;
3812 struct attribute
*attr
, *call_line
, *call_file
;
3815 struct block
*block
;
3816 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3820 /* If we do not have call site information, we can't show the
3821 caller of this inlined function. That's too confusing, so
3822 only use the scope for local variables. */
3823 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3824 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3825 if (call_line
== NULL
|| call_file
== NULL
)
3827 read_lexical_block_scope (die
, cu
);
3832 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3834 name
= dwarf2_linkage_name (die
, cu
);
3836 /* Ignore functions with missing or empty names and functions with
3837 missing or invalid low and high pc attributes. */
3838 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3844 /* Record the function range for dwarf_decode_lines. */
3845 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3847 new = push_context (0, lowpc
);
3848 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3850 /* If there is a location expression for DW_AT_frame_base, record
3852 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3854 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3855 expression is being recorded directly in the function's symbol
3856 and not in a separate frame-base object. I guess this hack is
3857 to avoid adding some sort of frame-base adjunct/annex to the
3858 function's symbol :-(. The problem with doing this is that it
3859 results in a function symbol with a location expression that
3860 has nothing to do with the location of the function, ouch! The
3861 relationship should be: a function's symbol has-a frame base; a
3862 frame-base has-a location expression. */
3863 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3865 cu
->list_in_scope
= &local_symbols
;
3867 if (die
->child
!= NULL
)
3869 child_die
= die
->child
;
3870 while (child_die
&& child_die
->tag
)
3872 process_die (child_die
, cu
);
3873 child_die
= sibling_die (child_die
);
3877 inherit_abstract_dies (die
, cu
);
3879 new = pop_context ();
3880 /* Make a block for the local symbols within. */
3881 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3882 lowpc
, highpc
, objfile
);
3884 /* For C++, set the block's scope. */
3885 if (cu
->language
== language_cplus
)
3886 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3887 determine_prefix (die
, cu
),
3888 processing_has_namespace_info
);
3890 /* If we have address ranges, record them. */
3891 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3893 /* In C++, we can have functions nested inside functions (e.g., when
3894 a function declares a class that has methods). This means that
3895 when we finish processing a function scope, we may need to go
3896 back to building a containing block's symbol lists. */
3897 local_symbols
= new->locals
;
3898 param_symbols
= new->params
;
3899 using_directives
= new->using_directives
;
3901 /* If we've finished processing a top-level function, subsequent
3902 symbols go in the file symbol list. */
3903 if (outermost_context_p ())
3904 cu
->list_in_scope
= &file_symbols
;
3907 /* Process all the DIES contained within a lexical block scope. Start
3908 a new scope, process the dies, and then close the scope. */
3911 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3913 struct objfile
*objfile
= cu
->objfile
;
3914 struct context_stack
*new;
3915 CORE_ADDR lowpc
, highpc
;
3916 struct die_info
*child_die
;
3919 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3921 /* Ignore blocks with missing or invalid low and high pc attributes. */
3922 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3923 as multiple lexical blocks? Handling children in a sane way would
3924 be nasty. Might be easier to properly extend generic blocks to
3926 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3931 push_context (0, lowpc
);
3932 if (die
->child
!= NULL
)
3934 child_die
= die
->child
;
3935 while (child_die
&& child_die
->tag
)
3937 process_die (child_die
, cu
);
3938 child_die
= sibling_die (child_die
);
3941 new = pop_context ();
3943 if (local_symbols
!= NULL
)
3946 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3949 /* Note that recording ranges after traversing children, as we
3950 do here, means that recording a parent's ranges entails
3951 walking across all its children's ranges as they appear in
3952 the address map, which is quadratic behavior.
3954 It would be nicer to record the parent's ranges before
3955 traversing its children, simply overriding whatever you find
3956 there. But since we don't even decide whether to create a
3957 block until after we've traversed its children, that's hard
3959 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3961 local_symbols
= new->locals
;
3962 using_directives
= new->using_directives
;
3965 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3966 Return 1 if the attributes are present and valid, otherwise, return 0.
3967 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3970 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3971 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
3972 struct partial_symtab
*ranges_pst
)
3974 struct objfile
*objfile
= cu
->objfile
;
3975 struct comp_unit_head
*cu_header
= &cu
->header
;
3976 bfd
*obfd
= objfile
->obfd
;
3977 unsigned int addr_size
= cu_header
->addr_size
;
3978 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3979 /* Base address selection entry. */
3990 found_base
= cu
->base_known
;
3991 base
= cu
->base_address
;
3993 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
3995 complaint (&symfile_complaints
,
3996 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4000 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4002 /* Read in the largest possible address. */
4003 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4004 if ((marker
& mask
) == mask
)
4006 /* If we found the largest possible address, then
4007 read the base address. */
4008 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4009 buffer
+= 2 * addr_size
;
4010 offset
+= 2 * addr_size
;
4016 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4020 CORE_ADDR range_beginning
, range_end
;
4022 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4023 buffer
+= addr_size
;
4024 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4025 buffer
+= addr_size
;
4026 offset
+= 2 * addr_size
;
4028 /* An end of list marker is a pair of zero addresses. */
4029 if (range_beginning
== 0 && range_end
== 0)
4030 /* Found the end of list entry. */
4033 /* Each base address selection entry is a pair of 2 values.
4034 The first is the largest possible address, the second is
4035 the base address. Check for a base address here. */
4036 if ((range_beginning
& mask
) == mask
)
4038 /* If we found the largest possible address, then
4039 read the base address. */
4040 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4047 /* We have no valid base address for the ranges
4049 complaint (&symfile_complaints
,
4050 _("Invalid .debug_ranges data (no base address)"));
4054 range_beginning
+= base
;
4057 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4058 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4059 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4062 /* FIXME: This is recording everything as a low-high
4063 segment of consecutive addresses. We should have a
4064 data structure for discontiguous block ranges
4068 low
= range_beginning
;
4074 if (range_beginning
< low
)
4075 low
= range_beginning
;
4076 if (range_end
> high
)
4082 /* If the first entry is an end-of-list marker, the range
4083 describes an empty scope, i.e. no instructions. */
4089 *high_return
= high
;
4093 /* Get low and high pc attributes from a die. Return 1 if the attributes
4094 are present and valid, otherwise, return 0. Return -1 if the range is
4095 discontinuous, i.e. derived from DW_AT_ranges information. */
4097 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4098 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4099 struct partial_symtab
*pst
)
4101 struct attribute
*attr
;
4106 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4109 high
= DW_ADDR (attr
);
4110 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4112 low
= DW_ADDR (attr
);
4114 /* Found high w/o low attribute. */
4117 /* Found consecutive range of addresses. */
4122 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4125 /* Value of the DW_AT_ranges attribute is the offset in the
4126 .debug_ranges section. */
4127 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4129 /* Found discontinuous range of addresses. */
4137 /* When using the GNU linker, .gnu.linkonce. sections are used to
4138 eliminate duplicate copies of functions and vtables and such.
4139 The linker will arbitrarily choose one and discard the others.
4140 The AT_*_pc values for such functions refer to local labels in
4141 these sections. If the section from that file was discarded, the
4142 labels are not in the output, so the relocs get a value of 0.
4143 If this is a discarded function, mark the pc bounds as invalid,
4144 so that GDB will ignore it. */
4145 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4153 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4154 its low and high PC addresses. Do nothing if these addresses could not
4155 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4156 and HIGHPC to the high address if greater than HIGHPC. */
4159 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4160 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4161 struct dwarf2_cu
*cu
)
4163 CORE_ADDR low
, high
;
4164 struct die_info
*child
= die
->child
;
4166 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4168 *lowpc
= min (*lowpc
, low
);
4169 *highpc
= max (*highpc
, high
);
4172 /* If the language does not allow nested subprograms (either inside
4173 subprograms or lexical blocks), we're done. */
4174 if (cu
->language
!= language_ada
)
4177 /* Check all the children of the given DIE. If it contains nested
4178 subprograms, then check their pc bounds. Likewise, we need to
4179 check lexical blocks as well, as they may also contain subprogram
4181 while (child
&& child
->tag
)
4183 if (child
->tag
== DW_TAG_subprogram
4184 || child
->tag
== DW_TAG_lexical_block
)
4185 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4186 child
= sibling_die (child
);
4190 /* Get the low and high pc's represented by the scope DIE, and store
4191 them in *LOWPC and *HIGHPC. If the correct values can't be
4192 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4195 get_scope_pc_bounds (struct die_info
*die
,
4196 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4197 struct dwarf2_cu
*cu
)
4199 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4200 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4201 CORE_ADDR current_low
, current_high
;
4203 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4205 best_low
= current_low
;
4206 best_high
= current_high
;
4210 struct die_info
*child
= die
->child
;
4212 while (child
&& child
->tag
)
4214 switch (child
->tag
) {
4215 case DW_TAG_subprogram
:
4216 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4218 case DW_TAG_namespace
:
4219 /* FIXME: carlton/2004-01-16: Should we do this for
4220 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4221 that current GCC's always emit the DIEs corresponding
4222 to definitions of methods of classes as children of a
4223 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4224 the DIEs giving the declarations, which could be
4225 anywhere). But I don't see any reason why the
4226 standards says that they have to be there. */
4227 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4229 if (current_low
!= ((CORE_ADDR
) -1))
4231 best_low
= min (best_low
, current_low
);
4232 best_high
= max (best_high
, current_high
);
4240 child
= sibling_die (child
);
4245 *highpc
= best_high
;
4248 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4251 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4252 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4254 struct attribute
*attr
;
4256 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4259 CORE_ADDR high
= DW_ADDR (attr
);
4260 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4263 CORE_ADDR low
= DW_ADDR (attr
);
4264 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4268 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4271 bfd
*obfd
= cu
->objfile
->obfd
;
4273 /* The value of the DW_AT_ranges attribute is the offset of the
4274 address range list in the .debug_ranges section. */
4275 unsigned long offset
= DW_UNSND (attr
);
4276 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4278 /* For some target architectures, but not others, the
4279 read_address function sign-extends the addresses it returns.
4280 To recognize base address selection entries, we need a
4282 unsigned int addr_size
= cu
->header
.addr_size
;
4283 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4285 /* The base address, to which the next pair is relative. Note
4286 that this 'base' is a DWARF concept: most entries in a range
4287 list are relative, to reduce the number of relocs against the
4288 debugging information. This is separate from this function's
4289 'baseaddr' argument, which GDB uses to relocate debugging
4290 information from a shared library based on the address at
4291 which the library was loaded. */
4292 CORE_ADDR base
= cu
->base_address
;
4293 int base_known
= cu
->base_known
;
4295 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4297 complaint (&symfile_complaints
,
4298 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4305 unsigned int bytes_read
;
4306 CORE_ADDR start
, end
;
4308 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4309 buffer
+= bytes_read
;
4310 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4311 buffer
+= bytes_read
;
4313 /* Did we find the end of the range list? */
4314 if (start
== 0 && end
== 0)
4317 /* Did we find a base address selection entry? */
4318 else if ((start
& base_select_mask
) == base_select_mask
)
4324 /* We found an ordinary address range. */
4329 complaint (&symfile_complaints
,
4330 _("Invalid .debug_ranges data (no base address)"));
4334 record_block_range (block
,
4335 baseaddr
+ base
+ start
,
4336 baseaddr
+ base
+ end
- 1);
4342 /* Add an aggregate field to the field list. */
4345 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4346 struct dwarf2_cu
*cu
)
4348 struct objfile
*objfile
= cu
->objfile
;
4349 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4350 struct nextfield
*new_field
;
4351 struct attribute
*attr
;
4353 char *fieldname
= "";
4355 /* Allocate a new field list entry and link it in. */
4356 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4357 make_cleanup (xfree
, new_field
);
4358 memset (new_field
, 0, sizeof (struct nextfield
));
4359 new_field
->next
= fip
->fields
;
4360 fip
->fields
= new_field
;
4363 /* Handle accessibility and virtuality of field.
4364 The default accessibility for members is public, the default
4365 accessibility for inheritance is private. */
4366 if (die
->tag
!= DW_TAG_inheritance
)
4367 new_field
->accessibility
= DW_ACCESS_public
;
4369 new_field
->accessibility
= DW_ACCESS_private
;
4370 new_field
->virtuality
= DW_VIRTUALITY_none
;
4372 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4374 new_field
->accessibility
= DW_UNSND (attr
);
4375 if (new_field
->accessibility
!= DW_ACCESS_public
)
4376 fip
->non_public_fields
= 1;
4377 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4379 new_field
->virtuality
= DW_UNSND (attr
);
4381 fp
= &new_field
->field
;
4383 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4385 /* Data member other than a C++ static data member. */
4387 /* Get type of field. */
4388 fp
->type
= die_type (die
, cu
);
4390 SET_FIELD_BITPOS (*fp
, 0);
4392 /* Get bit size of field (zero if none). */
4393 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4396 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4400 FIELD_BITSIZE (*fp
) = 0;
4403 /* Get bit offset of field. */
4404 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4407 int byte_offset
= 0;
4409 if (attr_form_is_section_offset (attr
))
4410 dwarf2_complex_location_expr_complaint ();
4411 else if (attr_form_is_constant (attr
))
4412 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4413 else if (attr_form_is_block (attr
))
4414 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4416 dwarf2_complex_location_expr_complaint ();
4418 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4420 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4423 if (gdbarch_bits_big_endian (gdbarch
))
4425 /* For big endian bits, the DW_AT_bit_offset gives the
4426 additional bit offset from the MSB of the containing
4427 anonymous object to the MSB of the field. We don't
4428 have to do anything special since we don't need to
4429 know the size of the anonymous object. */
4430 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4434 /* For little endian bits, compute the bit offset to the
4435 MSB of the anonymous object, subtract off the number of
4436 bits from the MSB of the field to the MSB of the
4437 object, and then subtract off the number of bits of
4438 the field itself. The result is the bit offset of
4439 the LSB of the field. */
4441 int bit_offset
= DW_UNSND (attr
);
4443 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4446 /* The size of the anonymous object containing
4447 the bit field is explicit, so use the
4448 indicated size (in bytes). */
4449 anonymous_size
= DW_UNSND (attr
);
4453 /* The size of the anonymous object containing
4454 the bit field must be inferred from the type
4455 attribute of the data member containing the
4457 anonymous_size
= TYPE_LENGTH (fp
->type
);
4459 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4460 - bit_offset
- FIELD_BITSIZE (*fp
);
4464 /* Get name of field. */
4465 fieldname
= dwarf2_name (die
, cu
);
4466 if (fieldname
== NULL
)
4469 /* The name is already allocated along with this objfile, so we don't
4470 need to duplicate it for the type. */
4471 fp
->name
= fieldname
;
4473 /* Change accessibility for artificial fields (e.g. virtual table
4474 pointer or virtual base class pointer) to private. */
4475 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4477 new_field
->accessibility
= DW_ACCESS_private
;
4478 fip
->non_public_fields
= 1;
4481 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4483 /* C++ static member. */
4485 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4486 is a declaration, but all versions of G++ as of this writing
4487 (so through at least 3.2.1) incorrectly generate
4488 DW_TAG_variable tags. */
4492 /* Get name of field. */
4493 fieldname
= dwarf2_name (die
, cu
);
4494 if (fieldname
== NULL
)
4497 /* Get physical name. */
4498 physname
= dwarf2_linkage_name (die
, cu
);
4500 /* The name is already allocated along with this objfile, so we don't
4501 need to duplicate it for the type. */
4502 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4503 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4504 FIELD_NAME (*fp
) = fieldname
;
4506 else if (die
->tag
== DW_TAG_inheritance
)
4508 /* C++ base class field. */
4509 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4512 int byte_offset
= 0;
4514 if (attr_form_is_section_offset (attr
))
4515 dwarf2_complex_location_expr_complaint ();
4516 else if (attr_form_is_constant (attr
))
4517 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4518 else if (attr_form_is_block (attr
))
4519 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4521 dwarf2_complex_location_expr_complaint ();
4523 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4525 FIELD_BITSIZE (*fp
) = 0;
4526 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4527 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4528 fip
->nbaseclasses
++;
4532 /* Create the vector of fields, and attach it to the type. */
4535 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4536 struct dwarf2_cu
*cu
)
4538 int nfields
= fip
->nfields
;
4540 /* Record the field count, allocate space for the array of fields,
4541 and create blank accessibility bitfields if necessary. */
4542 TYPE_NFIELDS (type
) = nfields
;
4543 TYPE_FIELDS (type
) = (struct field
*)
4544 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4545 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4547 if (fip
->non_public_fields
)
4549 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4551 TYPE_FIELD_PRIVATE_BITS (type
) =
4552 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4553 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4555 TYPE_FIELD_PROTECTED_BITS (type
) =
4556 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4557 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4559 TYPE_FIELD_IGNORE_BITS (type
) =
4560 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4561 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4564 /* If the type has baseclasses, allocate and clear a bit vector for
4565 TYPE_FIELD_VIRTUAL_BITS. */
4566 if (fip
->nbaseclasses
)
4568 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4569 unsigned char *pointer
;
4571 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4572 pointer
= TYPE_ALLOC (type
, num_bytes
);
4573 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4574 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4575 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4578 /* Copy the saved-up fields into the field vector. Start from the head
4579 of the list, adding to the tail of the field array, so that they end
4580 up in the same order in the array in which they were added to the list. */
4581 while (nfields
-- > 0)
4583 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
4584 switch (fip
->fields
->accessibility
)
4586 case DW_ACCESS_private
:
4587 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4590 case DW_ACCESS_protected
:
4591 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4594 case DW_ACCESS_public
:
4598 /* Unknown accessibility. Complain and treat it as public. */
4600 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4601 fip
->fields
->accessibility
);
4605 if (nfields
< fip
->nbaseclasses
)
4607 switch (fip
->fields
->virtuality
)
4609 case DW_VIRTUALITY_virtual
:
4610 case DW_VIRTUALITY_pure_virtual
:
4611 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4615 fip
->fields
= fip
->fields
->next
;
4619 /* Add a member function to the proper fieldlist. */
4622 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4623 struct type
*type
, struct dwarf2_cu
*cu
)
4625 struct objfile
*objfile
= cu
->objfile
;
4626 struct attribute
*attr
;
4627 struct fnfieldlist
*flp
;
4629 struct fn_field
*fnp
;
4632 struct nextfnfield
*new_fnfield
;
4633 struct type
*this_type
;
4635 /* Get name of member function. */
4636 fieldname
= dwarf2_name (die
, cu
);
4637 if (fieldname
== NULL
)
4640 /* Get the mangled name. */
4641 physname
= dwarf2_linkage_name (die
, cu
);
4643 /* Look up member function name in fieldlist. */
4644 for (i
= 0; i
< fip
->nfnfields
; i
++)
4646 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4650 /* Create new list element if necessary. */
4651 if (i
< fip
->nfnfields
)
4652 flp
= &fip
->fnfieldlists
[i
];
4655 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4657 fip
->fnfieldlists
= (struct fnfieldlist
*)
4658 xrealloc (fip
->fnfieldlists
,
4659 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4660 * sizeof (struct fnfieldlist
));
4661 if (fip
->nfnfields
== 0)
4662 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4664 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4665 flp
->name
= fieldname
;
4671 /* Create a new member function field and chain it to the field list
4673 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4674 make_cleanup (xfree
, new_fnfield
);
4675 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4676 new_fnfield
->next
= flp
->head
;
4677 flp
->head
= new_fnfield
;
4680 /* Fill in the member function field info. */
4681 fnp
= &new_fnfield
->fnfield
;
4682 /* The name is already allocated along with this objfile, so we don't
4683 need to duplicate it for the type. */
4684 fnp
->physname
= physname
? physname
: "";
4685 fnp
->type
= alloc_type (objfile
);
4686 this_type
= read_type_die (die
, cu
);
4687 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4689 int nparams
= TYPE_NFIELDS (this_type
);
4691 /* TYPE is the domain of this method, and THIS_TYPE is the type
4692 of the method itself (TYPE_CODE_METHOD). */
4693 smash_to_method_type (fnp
->type
, type
,
4694 TYPE_TARGET_TYPE (this_type
),
4695 TYPE_FIELDS (this_type
),
4696 TYPE_NFIELDS (this_type
),
4697 TYPE_VARARGS (this_type
));
4699 /* Handle static member functions.
4700 Dwarf2 has no clean way to discern C++ static and non-static
4701 member functions. G++ helps GDB by marking the first
4702 parameter for non-static member functions (which is the
4703 this pointer) as artificial. We obtain this information
4704 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4705 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4706 fnp
->voffset
= VOFFSET_STATIC
;
4709 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4712 /* Get fcontext from DW_AT_containing_type if present. */
4713 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4714 fnp
->fcontext
= die_containing_type (die
, cu
);
4716 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4717 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4719 /* Get accessibility. */
4720 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4723 switch (DW_UNSND (attr
))
4725 case DW_ACCESS_private
:
4726 fnp
->is_private
= 1;
4728 case DW_ACCESS_protected
:
4729 fnp
->is_protected
= 1;
4734 /* Check for artificial methods. */
4735 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4736 if (attr
&& DW_UNSND (attr
) != 0)
4737 fnp
->is_artificial
= 1;
4739 /* Get index in virtual function table if it is a virtual member function. */
4740 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4743 /* Support the .debug_loc offsets */
4744 if (attr_form_is_block (attr
))
4746 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4748 else if (attr_form_is_section_offset (attr
))
4750 dwarf2_complex_location_expr_complaint ();
4754 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4760 /* Create the vector of member function fields, and attach it to the type. */
4763 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4764 struct dwarf2_cu
*cu
)
4766 struct fnfieldlist
*flp
;
4767 int total_length
= 0;
4770 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4771 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4772 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4774 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4776 struct nextfnfield
*nfp
= flp
->head
;
4777 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4780 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4781 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4782 fn_flp
->fn_fields
= (struct fn_field
*)
4783 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4784 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4785 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4787 total_length
+= flp
->length
;
4790 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4791 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4794 /* Returns non-zero if NAME is the name of a vtable member in CU's
4795 language, zero otherwise. */
4797 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4799 static const char vptr
[] = "_vptr";
4800 static const char vtable
[] = "vtable";
4802 /* Look for the C++ and Java forms of the vtable. */
4803 if ((cu
->language
== language_java
4804 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4805 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4806 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4812 /* GCC outputs unnamed structures that are really pointers to member
4813 functions, with the ABI-specified layout. If DIE (from CU) describes
4814 such a structure, set its type, and return nonzero. Otherwise return
4817 GCC shouldn't do this; it should just output pointer to member DIEs.
4818 This is GCC PR debug/28767. */
4820 static struct type
*
4821 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
4823 struct objfile
*objfile
= cu
->objfile
;
4825 struct die_info
*pfn_die
, *delta_die
;
4826 struct attribute
*pfn_name
, *delta_name
;
4827 struct type
*pfn_type
, *domain_type
;
4829 /* Check for a structure with no name and two children. */
4830 if (die
->tag
!= DW_TAG_structure_type
4831 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
4832 || die
->child
== NULL
4833 || die
->child
->sibling
== NULL
4834 || (die
->child
->sibling
->sibling
!= NULL
4835 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
4838 /* Check for __pfn and __delta members. */
4839 pfn_die
= die
->child
;
4840 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
4841 if (pfn_die
->tag
!= DW_TAG_member
4843 || DW_STRING (pfn_name
) == NULL
4844 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
4847 delta_die
= pfn_die
->sibling
;
4848 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
4849 if (delta_die
->tag
!= DW_TAG_member
4850 || delta_name
== NULL
4851 || DW_STRING (delta_name
) == NULL
4852 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
4855 /* Find the type of the method. */
4856 pfn_type
= die_type (pfn_die
, cu
);
4857 if (pfn_type
== NULL
4858 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
4859 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
4862 /* Look for the "this" argument. */
4863 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
4864 if (TYPE_NFIELDS (pfn_type
) == 0
4865 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
4868 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
4869 type
= alloc_type (objfile
);
4870 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
4871 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
4872 TYPE_VARARGS (pfn_type
));
4873 type
= lookup_methodptr_type (type
);
4874 return set_die_type (die
, type
, cu
);
4877 /* Called when we find the DIE that starts a structure or union scope
4878 (definition) to process all dies that define the members of the
4881 NOTE: we need to call struct_type regardless of whether or not the
4882 DIE has an at_name attribute, since it might be an anonymous
4883 structure or union. This gets the type entered into our set of
4886 However, if the structure is incomplete (an opaque struct/union)
4887 then suppress creating a symbol table entry for it since gdb only
4888 wants to find the one with the complete definition. Note that if
4889 it is complete, we just call new_symbol, which does it's own
4890 checking about whether the struct/union is anonymous or not (and
4891 suppresses creating a symbol table entry itself). */
4893 static struct type
*
4894 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4896 struct objfile
*objfile
= cu
->objfile
;
4898 struct attribute
*attr
;
4900 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4902 type
= quirk_gcc_member_function_pointer (die
, cu
);
4906 /* If the definition of this type lives in .debug_types, read that type.
4907 Don't follow DW_AT_specification though, that will take us back up
4908 the chain and we want to go down. */
4909 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
4912 struct dwarf2_cu
*type_cu
= cu
;
4913 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
4914 /* We could just recurse on read_structure_type, but we need to call
4915 get_die_type to ensure only one type for this DIE is created.
4916 This is important, for example, because for c++ classes we need
4917 TYPE_NAME set which is only done by new_symbol. Blech. */
4918 type
= read_type_die (type_die
, type_cu
);
4919 return set_die_type (die
, type
, cu
);
4922 type
= alloc_type (objfile
);
4923 INIT_CPLUS_SPECIFIC (type
);
4925 name
= dwarf2_name (die
, cu
);
4928 if (cu
->language
== language_cplus
4929 || cu
->language
== language_java
)
4931 const char *new_prefix
= determine_class_name (die
, cu
);
4932 TYPE_TAG_NAME (type
) = (char *) new_prefix
;
4936 /* The name is already allocated along with this objfile, so
4937 we don't need to duplicate it for the type. */
4938 TYPE_TAG_NAME (type
) = name
;
4942 if (die
->tag
== DW_TAG_structure_type
)
4944 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
4946 else if (die
->tag
== DW_TAG_union_type
)
4948 TYPE_CODE (type
) = TYPE_CODE_UNION
;
4952 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
4954 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
4957 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4960 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4964 TYPE_LENGTH (type
) = 0;
4967 TYPE_STUB_SUPPORTED (type
) = 1;
4968 if (die_is_declaration (die
, cu
))
4969 TYPE_STUB (type
) = 1;
4971 /* We need to add the type field to the die immediately so we don't
4972 infinitely recurse when dealing with pointers to the structure
4973 type within the structure itself. */
4974 set_die_type (die
, type
, cu
);
4976 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
4978 struct field_info fi
;
4979 struct die_info
*child_die
;
4981 memset (&fi
, 0, sizeof (struct field_info
));
4983 child_die
= die
->child
;
4985 while (child_die
&& child_die
->tag
)
4987 if (child_die
->tag
== DW_TAG_member
4988 || child_die
->tag
== DW_TAG_variable
)
4990 /* NOTE: carlton/2002-11-05: A C++ static data member
4991 should be a DW_TAG_member that is a declaration, but
4992 all versions of G++ as of this writing (so through at
4993 least 3.2.1) incorrectly generate DW_TAG_variable
4994 tags for them instead. */
4995 dwarf2_add_field (&fi
, child_die
, cu
);
4997 else if (child_die
->tag
== DW_TAG_subprogram
)
4999 /* C++ member function. */
5000 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5002 else if (child_die
->tag
== DW_TAG_inheritance
)
5004 /* C++ base class field. */
5005 dwarf2_add_field (&fi
, child_die
, cu
);
5007 child_die
= sibling_die (child_die
);
5010 /* Attach fields and member functions to the type. */
5012 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5015 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5017 /* Get the type which refers to the base class (possibly this
5018 class itself) which contains the vtable pointer for the current
5019 class from the DW_AT_containing_type attribute. */
5021 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5023 struct type
*t
= die_containing_type (die
, cu
);
5025 TYPE_VPTR_BASETYPE (type
) = t
;
5030 /* Our own class provides vtbl ptr. */
5031 for (i
= TYPE_NFIELDS (t
) - 1;
5032 i
>= TYPE_N_BASECLASSES (t
);
5035 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5037 if (is_vtable_name (fieldname
, cu
))
5039 TYPE_VPTR_FIELDNO (type
) = i
;
5044 /* Complain if virtual function table field not found. */
5045 if (i
< TYPE_N_BASECLASSES (t
))
5046 complaint (&symfile_complaints
,
5047 _("virtual function table pointer not found when defining class '%s'"),
5048 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5053 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5056 else if (cu
->producer
5057 && strncmp (cu
->producer
,
5058 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5060 /* The IBM XLC compiler does not provide direct indication
5061 of the containing type, but the vtable pointer is
5062 always named __vfp. */
5066 for (i
= TYPE_NFIELDS (type
) - 1;
5067 i
>= TYPE_N_BASECLASSES (type
);
5070 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5072 TYPE_VPTR_FIELDNO (type
) = i
;
5073 TYPE_VPTR_BASETYPE (type
) = type
;
5081 do_cleanups (back_to
);
5086 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5088 struct objfile
*objfile
= cu
->objfile
;
5089 struct die_info
*child_die
= die
->child
;
5090 struct type
*this_type
;
5092 this_type
= get_die_type (die
, cu
);
5093 if (this_type
== NULL
)
5094 this_type
= read_structure_type (die
, cu
);
5096 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5097 snapshots) has been known to create a die giving a declaration
5098 for a class that has, as a child, a die giving a definition for a
5099 nested class. So we have to process our children even if the
5100 current die is a declaration. Normally, of course, a declaration
5101 won't have any children at all. */
5103 while (child_die
!= NULL
&& child_die
->tag
)
5105 if (child_die
->tag
== DW_TAG_member
5106 || child_die
->tag
== DW_TAG_variable
5107 || child_die
->tag
== DW_TAG_inheritance
)
5112 process_die (child_die
, cu
);
5114 child_die
= sibling_die (child_die
);
5117 /* Do not consider external references. According to the DWARF standard,
5118 these DIEs are identified by the fact that they have no byte_size
5119 attribute, and a declaration attribute. */
5120 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5121 || !die_is_declaration (die
, cu
))
5122 new_symbol (die
, this_type
, cu
);
5125 /* Given a DW_AT_enumeration_type die, set its type. We do not
5126 complete the type's fields yet, or create any symbols. */
5128 static struct type
*
5129 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5131 struct objfile
*objfile
= cu
->objfile
;
5133 struct attribute
*attr
;
5136 /* If the definition of this type lives in .debug_types, read that type.
5137 Don't follow DW_AT_specification though, that will take us back up
5138 the chain and we want to go down. */
5139 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5142 struct dwarf2_cu
*type_cu
= cu
;
5143 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5144 type
= read_type_die (type_die
, type_cu
);
5145 return set_die_type (die
, type
, cu
);
5148 type
= alloc_type (objfile
);
5150 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5151 name
= dwarf2_full_name (die
, cu
);
5153 TYPE_TAG_NAME (type
) = (char *) name
;
5155 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5158 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5162 TYPE_LENGTH (type
) = 0;
5165 /* The enumeration DIE can be incomplete. In Ada, any type can be
5166 declared as private in the package spec, and then defined only
5167 inside the package body. Such types are known as Taft Amendment
5168 Types. When another package uses such a type, an incomplete DIE
5169 may be generated by the compiler. */
5170 if (die_is_declaration (die
, cu
))
5171 TYPE_STUB (type
) = 1;
5173 return set_die_type (die
, type
, cu
);
5176 /* Determine the name of the type represented by DIE, which should be
5177 a named C++ or Java compound type. Return the name in question,
5178 allocated on the objfile obstack. */
5181 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
5183 const char *new_prefix
= NULL
;
5185 /* If we don't have namespace debug info, guess the name by trying
5186 to demangle the names of members, just like we did in
5187 guess_structure_name. */
5188 if (!processing_has_namespace_info
)
5190 struct die_info
*child
;
5192 for (child
= die
->child
;
5193 child
!= NULL
&& child
->tag
!= 0;
5194 child
= sibling_die (child
))
5196 if (child
->tag
== DW_TAG_subprogram
)
5199 = language_class_name_from_physname (cu
->language_defn
,
5203 if (phys_prefix
!= NULL
)
5206 = obsavestring (phys_prefix
, strlen (phys_prefix
),
5207 &cu
->objfile
->objfile_obstack
);
5208 xfree (phys_prefix
);
5215 if (new_prefix
== NULL
)
5216 new_prefix
= dwarf2_full_name (die
, cu
);
5221 /* Given a pointer to a die which begins an enumeration, process all
5222 the dies that define the members of the enumeration, and create the
5223 symbol for the enumeration type.
5225 NOTE: We reverse the order of the element list. */
5228 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5230 struct objfile
*objfile
= cu
->objfile
;
5231 struct die_info
*child_die
;
5232 struct field
*fields
;
5235 int unsigned_enum
= 1;
5237 struct type
*this_type
;
5241 this_type
= get_die_type (die
, cu
);
5242 if (this_type
== NULL
)
5243 this_type
= read_enumeration_type (die
, cu
);
5244 if (die
->child
!= NULL
)
5246 child_die
= die
->child
;
5247 while (child_die
&& child_die
->tag
)
5249 if (child_die
->tag
!= DW_TAG_enumerator
)
5251 process_die (child_die
, cu
);
5255 name
= dwarf2_name (child_die
, cu
);
5258 sym
= new_symbol (child_die
, this_type
, cu
);
5259 if (SYMBOL_VALUE (sym
) < 0)
5262 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5264 fields
= (struct field
*)
5266 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5267 * sizeof (struct field
));
5270 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5271 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5272 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5273 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5279 child_die
= sibling_die (child_die
);
5284 TYPE_NFIELDS (this_type
) = num_fields
;
5285 TYPE_FIELDS (this_type
) = (struct field
*)
5286 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5287 memcpy (TYPE_FIELDS (this_type
), fields
,
5288 sizeof (struct field
) * num_fields
);
5292 TYPE_UNSIGNED (this_type
) = 1;
5295 new_symbol (die
, this_type
, cu
);
5298 /* Extract all information from a DW_TAG_array_type DIE and put it in
5299 the DIE's type field. For now, this only handles one dimensional
5302 static struct type
*
5303 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5305 struct objfile
*objfile
= cu
->objfile
;
5306 struct die_info
*child_die
;
5307 struct type
*type
= NULL
;
5308 struct type
*element_type
, *range_type
, *index_type
;
5309 struct type
**range_types
= NULL
;
5310 struct attribute
*attr
;
5312 struct cleanup
*back_to
;
5315 element_type
= die_type (die
, cu
);
5317 /* Irix 6.2 native cc creates array types without children for
5318 arrays with unspecified length. */
5319 if (die
->child
== NULL
)
5321 index_type
= objfile_type (objfile
)->builtin_int
;
5322 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5323 type
= create_array_type (NULL
, element_type
, range_type
);
5324 return set_die_type (die
, type
, cu
);
5327 back_to
= make_cleanup (null_cleanup
, NULL
);
5328 child_die
= die
->child
;
5329 while (child_die
&& child_die
->tag
)
5331 if (child_die
->tag
== DW_TAG_subrange_type
)
5333 struct type
*child_type
= read_type_die (child_die
, cu
);
5334 if (child_type
!= NULL
)
5336 /* The range type was succesfully read. Save it for
5337 the array type creation. */
5338 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5340 range_types
= (struct type
**)
5341 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5342 * sizeof (struct type
*));
5344 make_cleanup (free_current_contents
, &range_types
);
5346 range_types
[ndim
++] = child_type
;
5349 child_die
= sibling_die (child_die
);
5352 /* Dwarf2 dimensions are output from left to right, create the
5353 necessary array types in backwards order. */
5355 type
= element_type
;
5357 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5361 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5366 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5369 /* Understand Dwarf2 support for vector types (like they occur on
5370 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5371 array type. This is not part of the Dwarf2/3 standard yet, but a
5372 custom vendor extension. The main difference between a regular
5373 array and the vector variant is that vectors are passed by value
5375 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5377 make_vector_type (type
);
5379 name
= dwarf2_name (die
, cu
);
5381 TYPE_NAME (type
) = name
;
5383 do_cleanups (back_to
);
5385 /* Install the type in the die. */
5386 return set_die_type (die
, type
, cu
);
5389 static enum dwarf_array_dim_ordering
5390 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5392 struct attribute
*attr
;
5394 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5396 if (attr
) return DW_SND (attr
);
5399 GNU F77 is a special case, as at 08/2004 array type info is the
5400 opposite order to the dwarf2 specification, but data is still
5401 laid out as per normal fortran.
5403 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5407 if (cu
->language
== language_fortran
5408 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5410 return DW_ORD_row_major
;
5413 switch (cu
->language_defn
->la_array_ordering
)
5415 case array_column_major
:
5416 return DW_ORD_col_major
;
5417 case array_row_major
:
5419 return DW_ORD_row_major
;
5423 /* Extract all information from a DW_TAG_set_type DIE and put it in
5424 the DIE's type field. */
5426 static struct type
*
5427 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5429 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5431 return set_die_type (die
, set_type
, cu
);
5434 /* First cut: install each common block member as a global variable. */
5437 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5439 struct die_info
*child_die
;
5440 struct attribute
*attr
;
5442 CORE_ADDR base
= (CORE_ADDR
) 0;
5444 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5447 /* Support the .debug_loc offsets */
5448 if (attr_form_is_block (attr
))
5450 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5452 else if (attr_form_is_section_offset (attr
))
5454 dwarf2_complex_location_expr_complaint ();
5458 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5459 "common block member");
5462 if (die
->child
!= NULL
)
5464 child_die
= die
->child
;
5465 while (child_die
&& child_die
->tag
)
5467 sym
= new_symbol (child_die
, NULL
, cu
);
5468 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5471 CORE_ADDR byte_offset
= 0;
5473 if (attr_form_is_section_offset (attr
))
5474 dwarf2_complex_location_expr_complaint ();
5475 else if (attr_form_is_constant (attr
))
5476 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5477 else if (attr_form_is_block (attr
))
5478 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5480 dwarf2_complex_location_expr_complaint ();
5482 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5483 add_symbol_to_list (sym
, &global_symbols
);
5485 child_die
= sibling_die (child_die
);
5490 /* Create a type for a C++ namespace. */
5492 static struct type
*
5493 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5495 struct objfile
*objfile
= cu
->objfile
;
5496 const char *previous_prefix
, *name
;
5500 /* For extensions, reuse the type of the original namespace. */
5501 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5503 struct die_info
*ext_die
;
5504 struct dwarf2_cu
*ext_cu
= cu
;
5505 ext_die
= dwarf2_extension (die
, &ext_cu
);
5506 type
= read_type_die (ext_die
, ext_cu
);
5507 return set_die_type (die
, type
, cu
);
5510 name
= namespace_name (die
, &is_anonymous
, cu
);
5512 /* Now build the name of the current namespace. */
5514 previous_prefix
= determine_prefix (die
, cu
);
5515 if (previous_prefix
[0] != '\0')
5516 name
= typename_concat (&objfile
->objfile_obstack
,
5517 previous_prefix
, name
, cu
);
5519 /* Create the type. */
5520 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5522 TYPE_NAME (type
) = (char *) name
;
5523 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5525 set_die_type (die
, type
, cu
);
5530 /* Read a C++ namespace. */
5533 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5535 struct objfile
*objfile
= cu
->objfile
;
5539 /* Add a symbol associated to this if we haven't seen the namespace
5540 before. Also, add a using directive if it's an anonymous
5543 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5547 type
= read_type_die (die
, cu
);
5548 new_symbol (die
, type
, cu
);
5550 name
= namespace_name (die
, &is_anonymous
, cu
);
5553 const char *previous_prefix
= determine_prefix (die
, cu
);
5554 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
));
5558 if (die
->child
!= NULL
)
5560 struct die_info
*child_die
= die
->child
;
5562 while (child_die
&& child_die
->tag
)
5564 process_die (child_die
, cu
);
5565 child_die
= sibling_die (child_die
);
5570 /* Read a Fortran module. */
5573 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5575 struct die_info
*child_die
= die
->child
;
5577 /* FIXME: Support the separate Fortran module namespaces. */
5579 while (child_die
&& child_die
->tag
)
5581 process_die (child_die
, cu
);
5582 child_die
= sibling_die (child_die
);
5586 /* Return the name of the namespace represented by DIE. Set
5587 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5591 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5593 struct die_info
*current_die
;
5594 const char *name
= NULL
;
5596 /* Loop through the extensions until we find a name. */
5598 for (current_die
= die
;
5599 current_die
!= NULL
;
5600 current_die
= dwarf2_extension (die
, &cu
))
5602 name
= dwarf2_name (current_die
, cu
);
5607 /* Is it an anonymous namespace? */
5609 *is_anonymous
= (name
== NULL
);
5611 name
= "(anonymous namespace)";
5616 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5617 the user defined type vector. */
5619 static struct type
*
5620 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5622 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5623 struct comp_unit_head
*cu_header
= &cu
->header
;
5625 struct attribute
*attr_byte_size
;
5626 struct attribute
*attr_address_class
;
5627 int byte_size
, addr_class
;
5629 type
= lookup_pointer_type (die_type (die
, cu
));
5631 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5633 byte_size
= DW_UNSND (attr_byte_size
);
5635 byte_size
= cu_header
->addr_size
;
5637 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5638 if (attr_address_class
)
5639 addr_class
= DW_UNSND (attr_address_class
);
5641 addr_class
= DW_ADDR_none
;
5643 /* If the pointer size or address class is different than the
5644 default, create a type variant marked as such and set the
5645 length accordingly. */
5646 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5648 if (gdbarch_address_class_type_flags_p (gdbarch
))
5652 type_flags
= gdbarch_address_class_type_flags
5653 (gdbarch
, byte_size
, addr_class
);
5654 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5656 type
= make_type_with_address_space (type
, type_flags
);
5658 else if (TYPE_LENGTH (type
) != byte_size
)
5660 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5663 /* Should we also complain about unhandled address classes? */
5667 TYPE_LENGTH (type
) = byte_size
;
5668 return set_die_type (die
, type
, cu
);
5671 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5672 the user defined type vector. */
5674 static struct type
*
5675 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5677 struct objfile
*objfile
= cu
->objfile
;
5679 struct type
*to_type
;
5680 struct type
*domain
;
5682 to_type
= die_type (die
, cu
);
5683 domain
= die_containing_type (die
, cu
);
5685 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5686 type
= lookup_methodptr_type (to_type
);
5688 type
= lookup_memberptr_type (to_type
, domain
);
5690 return set_die_type (die
, type
, cu
);
5693 /* Extract all information from a DW_TAG_reference_type DIE and add to
5694 the user defined type vector. */
5696 static struct type
*
5697 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5699 struct comp_unit_head
*cu_header
= &cu
->header
;
5701 struct attribute
*attr
;
5703 type
= lookup_reference_type (die_type (die
, cu
));
5704 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5707 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5711 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5713 return set_die_type (die
, type
, cu
);
5716 static struct type
*
5717 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5719 struct type
*base_type
, *cv_type
;
5721 base_type
= die_type (die
, cu
);
5722 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5723 return set_die_type (die
, cv_type
, cu
);
5726 static struct type
*
5727 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5729 struct type
*base_type
, *cv_type
;
5731 base_type
= die_type (die
, cu
);
5732 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5733 return set_die_type (die
, cv_type
, cu
);
5736 /* Extract all information from a DW_TAG_string_type DIE and add to
5737 the user defined type vector. It isn't really a user defined type,
5738 but it behaves like one, with other DIE's using an AT_user_def_type
5739 attribute to reference it. */
5741 static struct type
*
5742 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5744 struct objfile
*objfile
= cu
->objfile
;
5745 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5746 struct type
*type
, *range_type
, *index_type
, *char_type
;
5747 struct attribute
*attr
;
5748 unsigned int length
;
5750 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5753 length
= DW_UNSND (attr
);
5757 /* check for the DW_AT_byte_size attribute */
5758 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5761 length
= DW_UNSND (attr
);
5769 index_type
= objfile_type (objfile
)->builtin_int
;
5770 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5771 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5772 type
= create_string_type (NULL
, char_type
, range_type
);
5774 return set_die_type (die
, type
, cu
);
5777 /* Handle DIES due to C code like:
5781 int (*funcp)(int a, long l);
5785 ('funcp' generates a DW_TAG_subroutine_type DIE)
5788 static struct type
*
5789 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5791 struct type
*type
; /* Type that this function returns */
5792 struct type
*ftype
; /* Function that returns above type */
5793 struct attribute
*attr
;
5795 type
= die_type (die
, cu
);
5796 ftype
= lookup_function_type (type
);
5798 /* All functions in C++, Pascal and Java have prototypes. */
5799 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5800 if ((attr
&& (DW_UNSND (attr
) != 0))
5801 || cu
->language
== language_cplus
5802 || cu
->language
== language_java
5803 || cu
->language
== language_pascal
)
5804 TYPE_PROTOTYPED (ftype
) = 1;
5806 /* Store the calling convention in the type if it's available in
5807 the subroutine die. Otherwise set the calling convention to
5808 the default value DW_CC_normal. */
5809 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5810 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5812 if (die
->child
!= NULL
)
5814 struct die_info
*child_die
;
5818 /* Count the number of parameters.
5819 FIXME: GDB currently ignores vararg functions, but knows about
5820 vararg member functions. */
5821 child_die
= die
->child
;
5822 while (child_die
&& child_die
->tag
)
5824 if (child_die
->tag
== DW_TAG_formal_parameter
)
5826 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5827 TYPE_VARARGS (ftype
) = 1;
5828 child_die
= sibling_die (child_die
);
5831 /* Allocate storage for parameters and fill them in. */
5832 TYPE_NFIELDS (ftype
) = nparams
;
5833 TYPE_FIELDS (ftype
) = (struct field
*)
5834 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5836 child_die
= die
->child
;
5837 while (child_die
&& child_die
->tag
)
5839 if (child_die
->tag
== DW_TAG_formal_parameter
)
5841 /* Dwarf2 has no clean way to discern C++ static and non-static
5842 member functions. G++ helps GDB by marking the first
5843 parameter for non-static member functions (which is the
5844 this pointer) as artificial. We pass this information
5845 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5846 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5848 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5850 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5851 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
5854 child_die
= sibling_die (child_die
);
5858 return set_die_type (die
, ftype
, cu
);
5861 static struct type
*
5862 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
5864 struct objfile
*objfile
= cu
->objfile
;
5865 struct attribute
*attr
;
5866 const char *name
= NULL
;
5867 struct type
*this_type
;
5869 name
= dwarf2_full_name (die
, cu
);
5870 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
5871 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
5872 TYPE_NAME (this_type
) = (char *) name
;
5873 set_die_type (die
, this_type
, cu
);
5874 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
5878 /* Find a representation of a given base type and install
5879 it in the TYPE field of the die. */
5881 static struct type
*
5882 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5884 struct objfile
*objfile
= cu
->objfile
;
5886 struct attribute
*attr
;
5887 int encoding
= 0, size
= 0;
5889 enum type_code code
= TYPE_CODE_INT
;
5891 struct type
*target_type
= NULL
;
5893 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5896 encoding
= DW_UNSND (attr
);
5898 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5901 size
= DW_UNSND (attr
);
5903 name
= dwarf2_name (die
, cu
);
5906 complaint (&symfile_complaints
,
5907 _("DW_AT_name missing from DW_TAG_base_type"));
5912 case DW_ATE_address
:
5913 /* Turn DW_ATE_address into a void * pointer. */
5914 code
= TYPE_CODE_PTR
;
5915 type_flags
|= TYPE_FLAG_UNSIGNED
;
5916 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5918 case DW_ATE_boolean
:
5919 code
= TYPE_CODE_BOOL
;
5920 type_flags
|= TYPE_FLAG_UNSIGNED
;
5922 case DW_ATE_complex_float
:
5923 code
= TYPE_CODE_COMPLEX
;
5924 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
5926 case DW_ATE_decimal_float
:
5927 code
= TYPE_CODE_DECFLOAT
;
5930 code
= TYPE_CODE_FLT
;
5934 case DW_ATE_unsigned
:
5935 type_flags
|= TYPE_FLAG_UNSIGNED
;
5937 case DW_ATE_signed_char
:
5938 if (cu
->language
== language_ada
|| cu
->language
== language_m2
5939 || cu
->language
== language_pascal
)
5940 code
= TYPE_CODE_CHAR
;
5942 case DW_ATE_unsigned_char
:
5943 if (cu
->language
== language_ada
|| cu
->language
== language_m2
5944 || cu
->language
== language_pascal
)
5945 code
= TYPE_CODE_CHAR
;
5946 type_flags
|= TYPE_FLAG_UNSIGNED
;
5949 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
5950 dwarf_type_encoding_name (encoding
));
5954 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
5955 TYPE_NAME (type
) = name
;
5956 TYPE_TARGET_TYPE (type
) = target_type
;
5958 if (name
&& strcmp (name
, "char") == 0)
5959 TYPE_NOSIGN (type
) = 1;
5961 return set_die_type (die
, type
, cu
);
5964 /* Read the given DW_AT_subrange DIE. */
5966 static struct type
*
5967 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5969 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5970 struct type
*base_type
;
5971 struct type
*range_type
;
5972 struct attribute
*attr
;
5977 base_type
= die_type (die
, cu
);
5978 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
5980 complaint (&symfile_complaints
,
5981 _("DW_AT_type missing from DW_TAG_subrange_type"));
5983 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
5984 0, NULL
, cu
->objfile
);
5987 if (cu
->language
== language_fortran
)
5989 /* FORTRAN implies a lower bound of 1, if not given. */
5993 /* FIXME: For variable sized arrays either of these could be
5994 a variable rather than a constant value. We'll allow it,
5995 but we don't know how to handle it. */
5996 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
5998 low
= dwarf2_get_attr_constant_value (attr
, 0);
6000 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6003 if (attr
->form
== DW_FORM_block1
)
6005 /* GCC encodes arrays with unspecified or dynamic length
6006 with a DW_FORM_block1 attribute.
6007 FIXME: GDB does not yet know how to handle dynamic
6008 arrays properly, treat them as arrays with unspecified
6011 FIXME: jimb/2003-09-22: GDB does not really know
6012 how to handle arrays of unspecified length
6013 either; we just represent them as zero-length
6014 arrays. Choose an appropriate upper bound given
6015 the lower bound we've computed above. */
6019 high
= dwarf2_get_attr_constant_value (attr
, 1);
6022 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6024 name
= dwarf2_name (die
, cu
);
6026 TYPE_NAME (range_type
) = name
;
6028 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6030 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6032 return set_die_type (die
, range_type
, cu
);
6035 static struct type
*
6036 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6040 /* For now, we only support the C meaning of an unspecified type: void. */
6042 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6043 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6045 return set_die_type (die
, type
, cu
);
6048 /* Trivial hash function for die_info: the hash value of a DIE
6049 is its offset in .debug_info for this objfile. */
6052 die_hash (const void *item
)
6054 const struct die_info
*die
= item
;
6058 /* Trivial comparison function for die_info structures: two DIEs
6059 are equal if they have the same offset. */
6062 die_eq (const void *item_lhs
, const void *item_rhs
)
6064 const struct die_info
*die_lhs
= item_lhs
;
6065 const struct die_info
*die_rhs
= item_rhs
;
6066 return die_lhs
->offset
== die_rhs
->offset
;
6069 /* Read a whole compilation unit into a linked list of dies. */
6071 static struct die_info
*
6072 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6074 struct die_reader_specs reader_specs
;
6076 gdb_assert (cu
->die_hash
== NULL
);
6078 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6082 &cu
->comp_unit_obstack
,
6083 hashtab_obstack_allocate
,
6084 dummy_obstack_deallocate
);
6086 init_cu_die_reader (&reader_specs
, cu
);
6088 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6091 /* Main entry point for reading a DIE and all children.
6092 Read the DIE and dump it if requested. */
6094 static struct die_info
*
6095 read_die_and_children (const struct die_reader_specs
*reader
,
6097 gdb_byte
**new_info_ptr
,
6098 struct die_info
*parent
)
6100 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6101 new_info_ptr
, parent
);
6103 if (dwarf2_die_debug
)
6105 fprintf_unfiltered (gdb_stdlog
,
6106 "\nRead die from %s of %s:\n",
6107 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6109 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6111 : "unknown section",
6112 reader
->abfd
->filename
);
6113 dump_die (result
, dwarf2_die_debug
);
6119 /* Read a single die and all its descendents. Set the die's sibling
6120 field to NULL; set other fields in the die correctly, and set all
6121 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6122 location of the info_ptr after reading all of those dies. PARENT
6123 is the parent of the die in question. */
6125 static struct die_info
*
6126 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6128 gdb_byte
**new_info_ptr
,
6129 struct die_info
*parent
)
6131 struct die_info
*die
;
6135 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6138 *new_info_ptr
= cur_ptr
;
6141 store_in_ref_table (die
, reader
->cu
);
6144 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6148 *new_info_ptr
= cur_ptr
;
6151 die
->sibling
= NULL
;
6152 die
->parent
= parent
;
6156 /* Read a die, all of its descendents, and all of its siblings; set
6157 all of the fields of all of the dies correctly. Arguments are as
6158 in read_die_and_children. */
6160 static struct die_info
*
6161 read_die_and_siblings (const struct die_reader_specs
*reader
,
6163 gdb_byte
**new_info_ptr
,
6164 struct die_info
*parent
)
6166 struct die_info
*first_die
, *last_sibling
;
6170 first_die
= last_sibling
= NULL
;
6174 struct die_info
*die
6175 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6179 *new_info_ptr
= cur_ptr
;
6186 last_sibling
->sibling
= die
;
6192 /* Read the die from the .debug_info section buffer. Set DIEP to
6193 point to a newly allocated die with its information, except for its
6194 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6195 whether the die has children or not. */
6198 read_full_die (const struct die_reader_specs
*reader
,
6199 struct die_info
**diep
, gdb_byte
*info_ptr
,
6202 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6203 struct abbrev_info
*abbrev
;
6204 struct die_info
*die
;
6205 struct dwarf2_cu
*cu
= reader
->cu
;
6206 bfd
*abfd
= reader
->abfd
;
6208 offset
= info_ptr
- reader
->buffer
;
6209 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6210 info_ptr
+= bytes_read
;
6218 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6220 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6222 bfd_get_filename (abfd
));
6224 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6225 die
->offset
= offset
;
6226 die
->tag
= abbrev
->tag
;
6227 die
->abbrev
= abbrev_number
;
6229 die
->num_attrs
= abbrev
->num_attrs
;
6231 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6232 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6233 abfd
, info_ptr
, cu
);
6236 *has_children
= abbrev
->has_children
;
6240 /* In DWARF version 2, the description of the debugging information is
6241 stored in a separate .debug_abbrev section. Before we read any
6242 dies from a section we read in all abbreviations and install them
6243 in a hash table. This function also sets flags in CU describing
6244 the data found in the abbrev table. */
6247 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6249 struct comp_unit_head
*cu_header
= &cu
->header
;
6250 gdb_byte
*abbrev_ptr
;
6251 struct abbrev_info
*cur_abbrev
;
6252 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6253 unsigned int abbrev_form
, hash_number
;
6254 struct attr_abbrev
*cur_attrs
;
6255 unsigned int allocated_attrs
;
6257 /* Initialize dwarf2 abbrevs */
6258 obstack_init (&cu
->abbrev_obstack
);
6259 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6261 * sizeof (struct abbrev_info
*)));
6262 memset (cu
->dwarf2_abbrevs
, 0,
6263 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6265 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6266 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6267 abbrev_ptr
+= bytes_read
;
6269 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6270 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6272 /* loop until we reach an abbrev number of 0 */
6273 while (abbrev_number
)
6275 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6277 /* read in abbrev header */
6278 cur_abbrev
->number
= abbrev_number
;
6279 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6280 abbrev_ptr
+= bytes_read
;
6281 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6284 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6285 cu
->has_namespace_info
= 1;
6287 /* now read in declarations */
6288 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6289 abbrev_ptr
+= bytes_read
;
6290 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6291 abbrev_ptr
+= bytes_read
;
6294 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6296 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6298 = xrealloc (cur_attrs
, (allocated_attrs
6299 * sizeof (struct attr_abbrev
)));
6302 /* Record whether this compilation unit might have
6303 inter-compilation-unit references. If we don't know what form
6304 this attribute will have, then it might potentially be a
6305 DW_FORM_ref_addr, so we conservatively expect inter-CU
6308 if (abbrev_form
== DW_FORM_ref_addr
6309 || abbrev_form
== DW_FORM_indirect
)
6310 cu
->has_form_ref_addr
= 1;
6312 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6313 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6314 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6315 abbrev_ptr
+= bytes_read
;
6316 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6317 abbrev_ptr
+= bytes_read
;
6320 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6321 (cur_abbrev
->num_attrs
6322 * sizeof (struct attr_abbrev
)));
6323 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6324 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6326 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6327 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6328 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6330 /* Get next abbreviation.
6331 Under Irix6 the abbreviations for a compilation unit are not
6332 always properly terminated with an abbrev number of 0.
6333 Exit loop if we encounter an abbreviation which we have
6334 already read (which means we are about to read the abbreviations
6335 for the next compile unit) or if the end of the abbreviation
6336 table is reached. */
6337 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6338 >= dwarf2_per_objfile
->abbrev
.size
)
6340 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6341 abbrev_ptr
+= bytes_read
;
6342 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6349 /* Release the memory used by the abbrev table for a compilation unit. */
6352 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6354 struct dwarf2_cu
*cu
= ptr_to_cu
;
6356 obstack_free (&cu
->abbrev_obstack
, NULL
);
6357 cu
->dwarf2_abbrevs
= NULL
;
6360 /* Lookup an abbrev_info structure in the abbrev hash table. */
6362 static struct abbrev_info
*
6363 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6365 unsigned int hash_number
;
6366 struct abbrev_info
*abbrev
;
6368 hash_number
= number
% ABBREV_HASH_SIZE
;
6369 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6373 if (abbrev
->number
== number
)
6376 abbrev
= abbrev
->next
;
6381 /* Returns nonzero if TAG represents a type that we might generate a partial
6385 is_type_tag_for_partial (int tag
)
6390 /* Some types that would be reasonable to generate partial symbols for,
6391 that we don't at present. */
6392 case DW_TAG_array_type
:
6393 case DW_TAG_file_type
:
6394 case DW_TAG_ptr_to_member_type
:
6395 case DW_TAG_set_type
:
6396 case DW_TAG_string_type
:
6397 case DW_TAG_subroutine_type
:
6399 case DW_TAG_base_type
:
6400 case DW_TAG_class_type
:
6401 case DW_TAG_interface_type
:
6402 case DW_TAG_enumeration_type
:
6403 case DW_TAG_structure_type
:
6404 case DW_TAG_subrange_type
:
6405 case DW_TAG_typedef
:
6406 case DW_TAG_union_type
:
6413 /* Load all DIEs that are interesting for partial symbols into memory. */
6415 static struct partial_die_info
*
6416 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6417 int building_psymtab
, struct dwarf2_cu
*cu
)
6419 struct partial_die_info
*part_die
;
6420 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6421 struct abbrev_info
*abbrev
;
6422 unsigned int bytes_read
;
6423 unsigned int load_all
= 0;
6425 int nesting_level
= 1;
6430 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6434 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6438 &cu
->comp_unit_obstack
,
6439 hashtab_obstack_allocate
,
6440 dummy_obstack_deallocate
);
6442 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6443 sizeof (struct partial_die_info
));
6447 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6449 /* A NULL abbrev means the end of a series of children. */
6452 if (--nesting_level
== 0)
6454 /* PART_DIE was probably the last thing allocated on the
6455 comp_unit_obstack, so we could call obstack_free
6456 here. We don't do that because the waste is small,
6457 and will be cleaned up when we're done with this
6458 compilation unit. This way, we're also more robust
6459 against other users of the comp_unit_obstack. */
6462 info_ptr
+= bytes_read
;
6463 last_die
= parent_die
;
6464 parent_die
= parent_die
->die_parent
;
6468 /* Check whether this DIE is interesting enough to save. Normally
6469 we would not be interested in members here, but there may be
6470 later variables referencing them via DW_AT_specification (for
6473 && !is_type_tag_for_partial (abbrev
->tag
)
6474 && abbrev
->tag
!= DW_TAG_enumerator
6475 && abbrev
->tag
!= DW_TAG_subprogram
6476 && abbrev
->tag
!= DW_TAG_lexical_block
6477 && abbrev
->tag
!= DW_TAG_variable
6478 && abbrev
->tag
!= DW_TAG_namespace
6479 && abbrev
->tag
!= DW_TAG_member
)
6481 /* Otherwise we skip to the next sibling, if any. */
6482 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6486 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6487 buffer
, info_ptr
, cu
);
6489 /* This two-pass algorithm for processing partial symbols has a
6490 high cost in cache pressure. Thus, handle some simple cases
6491 here which cover the majority of C partial symbols. DIEs
6492 which neither have specification tags in them, nor could have
6493 specification tags elsewhere pointing at them, can simply be
6494 processed and discarded.
6496 This segment is also optional; scan_partial_symbols and
6497 add_partial_symbol will handle these DIEs if we chain
6498 them in normally. When compilers which do not emit large
6499 quantities of duplicate debug information are more common,
6500 this code can probably be removed. */
6502 /* Any complete simple types at the top level (pretty much all
6503 of them, for a language without namespaces), can be processed
6505 if (parent_die
== NULL
6506 && part_die
->has_specification
== 0
6507 && part_die
->is_declaration
== 0
6508 && (part_die
->tag
== DW_TAG_typedef
6509 || part_die
->tag
== DW_TAG_base_type
6510 || part_die
->tag
== DW_TAG_subrange_type
))
6512 if (building_psymtab
&& part_die
->name
!= NULL
)
6513 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
6514 VAR_DOMAIN
, LOC_TYPEDEF
,
6515 &cu
->objfile
->static_psymbols
,
6516 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6517 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6521 /* If we're at the second level, and we're an enumerator, and
6522 our parent has no specification (meaning possibly lives in a
6523 namespace elsewhere), then we can add the partial symbol now
6524 instead of queueing it. */
6525 if (part_die
->tag
== DW_TAG_enumerator
6526 && parent_die
!= NULL
6527 && parent_die
->die_parent
== NULL
6528 && parent_die
->tag
== DW_TAG_enumeration_type
6529 && parent_die
->has_specification
== 0)
6531 if (part_die
->name
== NULL
)
6532 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6533 else if (building_psymtab
)
6534 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
6535 VAR_DOMAIN
, LOC_CONST
,
6536 (cu
->language
== language_cplus
6537 || cu
->language
== language_java
)
6538 ? &cu
->objfile
->global_psymbols
6539 : &cu
->objfile
->static_psymbols
,
6540 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6542 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6546 /* We'll save this DIE so link it in. */
6547 part_die
->die_parent
= parent_die
;
6548 part_die
->die_sibling
= NULL
;
6549 part_die
->die_child
= NULL
;
6551 if (last_die
&& last_die
== parent_die
)
6552 last_die
->die_child
= part_die
;
6554 last_die
->die_sibling
= part_die
;
6556 last_die
= part_die
;
6558 if (first_die
== NULL
)
6559 first_die
= part_die
;
6561 /* Maybe add the DIE to the hash table. Not all DIEs that we
6562 find interesting need to be in the hash table, because we
6563 also have the parent/sibling/child chains; only those that we
6564 might refer to by offset later during partial symbol reading.
6566 For now this means things that might have be the target of a
6567 DW_AT_specification, DW_AT_abstract_origin, or
6568 DW_AT_extension. DW_AT_extension will refer only to
6569 namespaces; DW_AT_abstract_origin refers to functions (and
6570 many things under the function DIE, but we do not recurse
6571 into function DIEs during partial symbol reading) and
6572 possibly variables as well; DW_AT_specification refers to
6573 declarations. Declarations ought to have the DW_AT_declaration
6574 flag. It happens that GCC forgets to put it in sometimes, but
6575 only for functions, not for types.
6577 Adding more things than necessary to the hash table is harmless
6578 except for the performance cost. Adding too few will result in
6579 wasted time in find_partial_die, when we reread the compilation
6580 unit with load_all_dies set. */
6583 || abbrev
->tag
== DW_TAG_subprogram
6584 || abbrev
->tag
== DW_TAG_variable
6585 || abbrev
->tag
== DW_TAG_namespace
6586 || part_die
->is_declaration
)
6590 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6591 part_die
->offset
, INSERT
);
6595 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6596 sizeof (struct partial_die_info
));
6598 /* For some DIEs we want to follow their children (if any). For C
6599 we have no reason to follow the children of structures; for other
6600 languages we have to, both so that we can get at method physnames
6601 to infer fully qualified class names, and for DW_AT_specification.
6603 For Ada, we need to scan the children of subprograms and lexical
6604 blocks as well because Ada allows the definition of nested
6605 entities that could be interesting for the debugger, such as
6606 nested subprograms for instance. */
6607 if (last_die
->has_children
6609 || last_die
->tag
== DW_TAG_namespace
6610 || last_die
->tag
== DW_TAG_enumeration_type
6611 || (cu
->language
!= language_c
6612 && (last_die
->tag
== DW_TAG_class_type
6613 || last_die
->tag
== DW_TAG_interface_type
6614 || last_die
->tag
== DW_TAG_structure_type
6615 || last_die
->tag
== DW_TAG_union_type
))
6616 || (cu
->language
== language_ada
6617 && (last_die
->tag
== DW_TAG_subprogram
6618 || last_die
->tag
== DW_TAG_lexical_block
))))
6621 parent_die
= last_die
;
6625 /* Otherwise we skip to the next sibling, if any. */
6626 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6628 /* Back to the top, do it again. */
6632 /* Read a minimal amount of information into the minimal die structure. */
6635 read_partial_die (struct partial_die_info
*part_die
,
6636 struct abbrev_info
*abbrev
,
6637 unsigned int abbrev_len
, bfd
*abfd
,
6638 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6639 struct dwarf2_cu
*cu
)
6641 unsigned int bytes_read
, i
;
6642 struct attribute attr
;
6643 int has_low_pc_attr
= 0;
6644 int has_high_pc_attr
= 0;
6646 memset (part_die
, 0, sizeof (struct partial_die_info
));
6648 part_die
->offset
= info_ptr
- buffer
;
6650 info_ptr
+= abbrev_len
;
6655 part_die
->tag
= abbrev
->tag
;
6656 part_die
->has_children
= abbrev
->has_children
;
6658 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6660 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6662 /* Store the data if it is of an attribute we want to keep in a
6663 partial symbol table. */
6667 switch (part_die
->tag
)
6669 case DW_TAG_compile_unit
:
6670 case DW_TAG_type_unit
:
6671 /* Compilation units have a DW_AT_name that is a filename, not
6672 a source language identifier. */
6673 case DW_TAG_enumeration_type
:
6674 case DW_TAG_enumerator
:
6675 /* These tags always have simple identifiers already; no need
6676 to canonicalize them. */
6677 part_die
->name
= DW_STRING (&attr
);
6681 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6682 &cu
->comp_unit_obstack
);
6686 case DW_AT_MIPS_linkage_name
:
6687 part_die
->name
= DW_STRING (&attr
);
6690 has_low_pc_attr
= 1;
6691 part_die
->lowpc
= DW_ADDR (&attr
);
6694 has_high_pc_attr
= 1;
6695 part_die
->highpc
= DW_ADDR (&attr
);
6697 case DW_AT_location
:
6698 /* Support the .debug_loc offsets */
6699 if (attr_form_is_block (&attr
))
6701 part_die
->locdesc
= DW_BLOCK (&attr
);
6703 else if (attr_form_is_section_offset (&attr
))
6705 dwarf2_complex_location_expr_complaint ();
6709 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6710 "partial symbol information");
6713 case DW_AT_external
:
6714 part_die
->is_external
= DW_UNSND (&attr
);
6716 case DW_AT_declaration
:
6717 part_die
->is_declaration
= DW_UNSND (&attr
);
6720 part_die
->has_type
= 1;
6722 case DW_AT_abstract_origin
:
6723 case DW_AT_specification
:
6724 case DW_AT_extension
:
6725 part_die
->has_specification
= 1;
6726 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6729 /* Ignore absolute siblings, they might point outside of
6730 the current compile unit. */
6731 if (attr
.form
== DW_FORM_ref_addr
)
6732 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6734 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6736 case DW_AT_byte_size
:
6737 part_die
->has_byte_size
= 1;
6739 case DW_AT_calling_convention
:
6740 /* DWARF doesn't provide a way to identify a program's source-level
6741 entry point. DW_AT_calling_convention attributes are only meant
6742 to describe functions' calling conventions.
6744 However, because it's a necessary piece of information in
6745 Fortran, and because DW_CC_program is the only piece of debugging
6746 information whose definition refers to a 'main program' at all,
6747 several compilers have begun marking Fortran main programs with
6748 DW_CC_program --- even when those functions use the standard
6749 calling conventions.
6751 So until DWARF specifies a way to provide this information and
6752 compilers pick up the new representation, we'll support this
6754 if (DW_UNSND (&attr
) == DW_CC_program
6755 && cu
->language
== language_fortran
)
6756 set_main_name (part_die
->name
);
6763 /* When using the GNU linker, .gnu.linkonce. sections are used to
6764 eliminate duplicate copies of functions and vtables and such.
6765 The linker will arbitrarily choose one and discard the others.
6766 The AT_*_pc values for such functions refer to local labels in
6767 these sections. If the section from that file was discarded, the
6768 labels are not in the output, so the relocs get a value of 0.
6769 If this is a discarded function, mark the pc bounds as invalid,
6770 so that GDB will ignore it. */
6771 if (has_low_pc_attr
&& has_high_pc_attr
6772 && part_die
->lowpc
< part_die
->highpc
6773 && (part_die
->lowpc
!= 0
6774 || dwarf2_per_objfile
->has_section_at_zero
))
6775 part_die
->has_pc_info
= 1;
6780 /* Find a cached partial DIE at OFFSET in CU. */
6782 static struct partial_die_info
*
6783 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6785 struct partial_die_info
*lookup_die
= NULL
;
6786 struct partial_die_info part_die
;
6788 part_die
.offset
= offset
;
6789 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6794 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6795 except in the case of .debug_types DIEs which do not reference
6796 outside their CU (they do however referencing other types via
6799 static struct partial_die_info
*
6800 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6802 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6803 struct partial_die_info
*pd
= NULL
;
6805 if (cu
->per_cu
->from_debug_types
)
6807 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6813 if (offset_in_cu_p (&cu
->header
, offset
))
6815 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6820 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6822 if (per_cu
->cu
== NULL
)
6824 load_partial_comp_unit (per_cu
, cu
->objfile
);
6825 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6826 dwarf2_per_objfile
->read_in_chain
= per_cu
;
6829 per_cu
->cu
->last_used
= 0;
6830 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6832 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
6834 struct cleanup
*back_to
;
6835 struct partial_die_info comp_unit_die
;
6836 struct abbrev_info
*abbrev
;
6837 unsigned int bytes_read
;
6840 per_cu
->load_all_dies
= 1;
6842 /* Re-read the DIEs. */
6843 back_to
= make_cleanup (null_cleanup
, 0);
6844 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6846 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6847 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6849 info_ptr
= (dwarf2_per_objfile
->info
.buffer
6850 + per_cu
->cu
->header
.offset
6851 + per_cu
->cu
->header
.first_die_offset
);
6852 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6853 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6854 per_cu
->cu
->objfile
->obfd
,
6855 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6857 if (comp_unit_die
.has_children
)
6858 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
6859 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6861 do_cleanups (back_to
);
6863 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6869 internal_error (__FILE__
, __LINE__
,
6870 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6871 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6875 /* Adjust PART_DIE before generating a symbol for it. This function
6876 may set the is_external flag or change the DIE's name. */
6879 fixup_partial_die (struct partial_die_info
*part_die
,
6880 struct dwarf2_cu
*cu
)
6882 /* If we found a reference attribute and the DIE has no name, try
6883 to find a name in the referred to DIE. */
6885 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6887 struct partial_die_info
*spec_die
;
6889 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6891 fixup_partial_die (spec_die
, cu
);
6895 part_die
->name
= spec_die
->name
;
6897 /* Copy DW_AT_external attribute if it is set. */
6898 if (spec_die
->is_external
)
6899 part_die
->is_external
= spec_die
->is_external
;
6903 /* Set default names for some unnamed DIEs. */
6904 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6905 || part_die
->tag
== DW_TAG_class_type
))
6906 part_die
->name
= "(anonymous class)";
6908 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6909 part_die
->name
= "(anonymous namespace)";
6911 if (part_die
->tag
== DW_TAG_structure_type
6912 || part_die
->tag
== DW_TAG_class_type
6913 || part_die
->tag
== DW_TAG_union_type
)
6914 guess_structure_name (part_die
, cu
);
6917 /* Read an attribute value described by an attribute form. */
6920 read_attribute_value (struct attribute
*attr
, unsigned form
,
6921 bfd
*abfd
, gdb_byte
*info_ptr
,
6922 struct dwarf2_cu
*cu
)
6924 struct comp_unit_head
*cu_header
= &cu
->header
;
6925 unsigned int bytes_read
;
6926 struct dwarf_block
*blk
;
6932 case DW_FORM_ref_addr
:
6933 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
6934 info_ptr
+= bytes_read
;
6936 case DW_FORM_block2
:
6937 blk
= dwarf_alloc_block (cu
);
6938 blk
->size
= read_2_bytes (abfd
, info_ptr
);
6940 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6941 info_ptr
+= blk
->size
;
6942 DW_BLOCK (attr
) = blk
;
6944 case DW_FORM_block4
:
6945 blk
= dwarf_alloc_block (cu
);
6946 blk
->size
= read_4_bytes (abfd
, info_ptr
);
6948 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6949 info_ptr
+= blk
->size
;
6950 DW_BLOCK (attr
) = blk
;
6953 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
6957 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
6961 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
6964 case DW_FORM_string
:
6965 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
6966 DW_STRING_IS_CANONICAL (attr
) = 0;
6967 info_ptr
+= bytes_read
;
6970 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
6972 DW_STRING_IS_CANONICAL (attr
) = 0;
6973 info_ptr
+= bytes_read
;
6976 blk
= dwarf_alloc_block (cu
);
6977 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6978 info_ptr
+= bytes_read
;
6979 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6980 info_ptr
+= blk
->size
;
6981 DW_BLOCK (attr
) = blk
;
6983 case DW_FORM_block1
:
6984 blk
= dwarf_alloc_block (cu
);
6985 blk
->size
= read_1_byte (abfd
, info_ptr
);
6987 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6988 info_ptr
+= blk
->size
;
6989 DW_BLOCK (attr
) = blk
;
6992 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6996 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7000 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7001 info_ptr
+= bytes_read
;
7004 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7005 info_ptr
+= bytes_read
;
7008 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7012 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7016 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7020 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7024 /* Convert the signature to something we can record in DW_UNSND
7026 NOTE: This is NULL if the type wasn't found. */
7027 DW_SIGNATURED_TYPE (attr
) =
7028 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7031 case DW_FORM_ref_udata
:
7032 DW_ADDR (attr
) = (cu
->header
.offset
7033 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7034 info_ptr
+= bytes_read
;
7036 case DW_FORM_indirect
:
7037 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7038 info_ptr
+= bytes_read
;
7039 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7042 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7043 dwarf_form_name (form
),
7044 bfd_get_filename (abfd
));
7047 /* We have seen instances where the compiler tried to emit a byte
7048 size attribute of -1 which ended up being encoded as an unsigned
7049 0xffffffff. Although 0xffffffff is technically a valid size value,
7050 an object of this size seems pretty unlikely so we can relatively
7051 safely treat these cases as if the size attribute was invalid and
7052 treat them as zero by default. */
7053 if (attr
->name
== DW_AT_byte_size
7054 && form
== DW_FORM_data4
7055 && DW_UNSND (attr
) >= 0xffffffff)
7058 (&symfile_complaints
,
7059 _("Suspicious DW_AT_byte_size value treated as zero instead of 0x%lx"),
7061 DW_UNSND (attr
) = 0;
7067 /* Read an attribute described by an abbreviated attribute. */
7070 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7071 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7073 attr
->name
= abbrev
->name
;
7074 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7077 /* read dwarf information from a buffer */
7080 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7082 return bfd_get_8 (abfd
, buf
);
7086 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7088 return bfd_get_signed_8 (abfd
, buf
);
7092 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7094 return bfd_get_16 (abfd
, buf
);
7098 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7100 return bfd_get_signed_16 (abfd
, buf
);
7104 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7106 return bfd_get_32 (abfd
, buf
);
7110 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7112 return bfd_get_signed_32 (abfd
, buf
);
7116 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7118 return bfd_get_64 (abfd
, buf
);
7122 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7123 unsigned int *bytes_read
)
7125 struct comp_unit_head
*cu_header
= &cu
->header
;
7126 CORE_ADDR retval
= 0;
7128 if (cu_header
->signed_addr_p
)
7130 switch (cu_header
->addr_size
)
7133 retval
= bfd_get_signed_16 (abfd
, buf
);
7136 retval
= bfd_get_signed_32 (abfd
, buf
);
7139 retval
= bfd_get_signed_64 (abfd
, buf
);
7142 internal_error (__FILE__
, __LINE__
,
7143 _("read_address: bad switch, signed [in module %s]"),
7144 bfd_get_filename (abfd
));
7149 switch (cu_header
->addr_size
)
7152 retval
= bfd_get_16 (abfd
, buf
);
7155 retval
= bfd_get_32 (abfd
, buf
);
7158 retval
= bfd_get_64 (abfd
, buf
);
7161 internal_error (__FILE__
, __LINE__
,
7162 _("read_address: bad switch, unsigned [in module %s]"),
7163 bfd_get_filename (abfd
));
7167 *bytes_read
= cu_header
->addr_size
;
7171 /* Read the initial length from a section. The (draft) DWARF 3
7172 specification allows the initial length to take up either 4 bytes
7173 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7174 bytes describe the length and all offsets will be 8 bytes in length
7177 An older, non-standard 64-bit format is also handled by this
7178 function. The older format in question stores the initial length
7179 as an 8-byte quantity without an escape value. Lengths greater
7180 than 2^32 aren't very common which means that the initial 4 bytes
7181 is almost always zero. Since a length value of zero doesn't make
7182 sense for the 32-bit format, this initial zero can be considered to
7183 be an escape value which indicates the presence of the older 64-bit
7184 format. As written, the code can't detect (old format) lengths
7185 greater than 4GB. If it becomes necessary to handle lengths
7186 somewhat larger than 4GB, we could allow other small values (such
7187 as the non-sensical values of 1, 2, and 3) to also be used as
7188 escape values indicating the presence of the old format.
7190 The value returned via bytes_read should be used to increment the
7191 relevant pointer after calling read_initial_length().
7193 [ Note: read_initial_length() and read_offset() are based on the
7194 document entitled "DWARF Debugging Information Format", revision
7195 3, draft 8, dated November 19, 2001. This document was obtained
7198 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7200 This document is only a draft and is subject to change. (So beware.)
7202 Details regarding the older, non-standard 64-bit format were
7203 determined empirically by examining 64-bit ELF files produced by
7204 the SGI toolchain on an IRIX 6.5 machine.
7206 - Kevin, July 16, 2002
7210 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7212 LONGEST length
= bfd_get_32 (abfd
, buf
);
7214 if (length
== 0xffffffff)
7216 length
= bfd_get_64 (abfd
, buf
+ 4);
7219 else if (length
== 0)
7221 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7222 length
= bfd_get_64 (abfd
, buf
);
7233 /* Cover function for read_initial_length.
7234 Returns the length of the object at BUF, and stores the size of the
7235 initial length in *BYTES_READ and stores the size that offsets will be in
7237 If the initial length size is not equivalent to that specified in
7238 CU_HEADER then issue a complaint.
7239 This is useful when reading non-comp-unit headers. */
7242 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7243 const struct comp_unit_head
*cu_header
,
7244 unsigned int *bytes_read
,
7245 unsigned int *offset_size
)
7247 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7249 gdb_assert (cu_header
->initial_length_size
== 4
7250 || cu_header
->initial_length_size
== 8
7251 || cu_header
->initial_length_size
== 12);
7253 if (cu_header
->initial_length_size
!= *bytes_read
)
7254 complaint (&symfile_complaints
,
7255 _("intermixed 32-bit and 64-bit DWARF sections"));
7257 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7261 /* Read an offset from the data stream. The size of the offset is
7262 given by cu_header->offset_size. */
7265 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7266 unsigned int *bytes_read
)
7268 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7269 *bytes_read
= cu_header
->offset_size
;
7273 /* Read an offset from the data stream. */
7276 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7280 switch (offset_size
)
7283 retval
= bfd_get_32 (abfd
, buf
);
7286 retval
= bfd_get_64 (abfd
, buf
);
7289 internal_error (__FILE__
, __LINE__
,
7290 _("read_offset_1: bad switch [in module %s]"),
7291 bfd_get_filename (abfd
));
7298 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7300 /* If the size of a host char is 8 bits, we can return a pointer
7301 to the buffer, otherwise we have to copy the data to a buffer
7302 allocated on the temporary obstack. */
7303 gdb_assert (HOST_CHAR_BIT
== 8);
7308 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7310 /* If the size of a host char is 8 bits, we can return a pointer
7311 to the string, otherwise we have to copy the string to a buffer
7312 allocated on the temporary obstack. */
7313 gdb_assert (HOST_CHAR_BIT
== 8);
7316 *bytes_read_ptr
= 1;
7319 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7320 return (char *) buf
;
7324 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7325 const struct comp_unit_head
*cu_header
,
7326 unsigned int *bytes_read_ptr
)
7328 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7330 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7332 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7333 bfd_get_filename (abfd
));
7336 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7338 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7339 bfd_get_filename (abfd
));
7342 gdb_assert (HOST_CHAR_BIT
== 8);
7343 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7345 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7348 static unsigned long
7349 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7351 unsigned long result
;
7352 unsigned int num_read
;
7362 byte
= bfd_get_8 (abfd
, buf
);
7365 result
|= ((unsigned long)(byte
& 127) << shift
);
7366 if ((byte
& 128) == 0)
7372 *bytes_read_ptr
= num_read
;
7377 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7380 int i
, shift
, num_read
;
7389 byte
= bfd_get_8 (abfd
, buf
);
7392 result
|= ((long)(byte
& 127) << shift
);
7394 if ((byte
& 128) == 0)
7399 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7400 result
|= -(((long)1) << shift
);
7401 *bytes_read_ptr
= num_read
;
7405 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7408 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7414 byte
= bfd_get_8 (abfd
, buf
);
7416 if ((byte
& 128) == 0)
7422 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7429 cu
->language
= language_c
;
7431 case DW_LANG_C_plus_plus
:
7432 cu
->language
= language_cplus
;
7434 case DW_LANG_Fortran77
:
7435 case DW_LANG_Fortran90
:
7436 case DW_LANG_Fortran95
:
7437 cu
->language
= language_fortran
;
7439 case DW_LANG_Mips_Assembler
:
7440 cu
->language
= language_asm
;
7443 cu
->language
= language_java
;
7447 cu
->language
= language_ada
;
7449 case DW_LANG_Modula2
:
7450 cu
->language
= language_m2
;
7452 case DW_LANG_Pascal83
:
7453 cu
->language
= language_pascal
;
7456 cu
->language
= language_objc
;
7458 case DW_LANG_Cobol74
:
7459 case DW_LANG_Cobol85
:
7461 cu
->language
= language_minimal
;
7464 cu
->language_defn
= language_def (cu
->language
);
7467 /* Return the named attribute or NULL if not there. */
7469 static struct attribute
*
7470 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7473 struct attribute
*spec
= NULL
;
7475 for (i
= 0; i
< die
->num_attrs
; ++i
)
7477 if (die
->attrs
[i
].name
== name
)
7478 return &die
->attrs
[i
];
7479 if (die
->attrs
[i
].name
== DW_AT_specification
7480 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7481 spec
= &die
->attrs
[i
];
7486 die
= follow_die_ref (die
, spec
, &cu
);
7487 return dwarf2_attr (die
, name
, cu
);
7493 /* Return the named attribute or NULL if not there,
7494 but do not follow DW_AT_specification, etc.
7495 This is for use in contexts where we're reading .debug_types dies.
7496 Following DW_AT_specification, DW_AT_abstract_origin will take us
7497 back up the chain, and we want to go down. */
7499 static struct attribute
*
7500 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7501 struct dwarf2_cu
*cu
)
7505 for (i
= 0; i
< die
->num_attrs
; ++i
)
7506 if (die
->attrs
[i
].name
== name
)
7507 return &die
->attrs
[i
];
7512 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7513 and holds a non-zero value. This function should only be used for
7514 DW_FORM_flag attributes. */
7517 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7519 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7521 return (attr
&& DW_UNSND (attr
));
7525 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7527 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7528 which value is non-zero. However, we have to be careful with
7529 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7530 (via dwarf2_flag_true_p) follows this attribute. So we may
7531 end up accidently finding a declaration attribute that belongs
7532 to a different DIE referenced by the specification attribute,
7533 even though the given DIE does not have a declaration attribute. */
7534 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7535 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7538 /* Return the die giving the specification for DIE, if there is
7539 one. *SPEC_CU is the CU containing DIE on input, and the CU
7540 containing the return value on output. If there is no
7541 specification, but there is an abstract origin, that is
7544 static struct die_info
*
7545 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7547 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7550 if (spec_attr
== NULL
)
7551 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7553 if (spec_attr
== NULL
)
7556 return follow_die_ref (die
, spec_attr
, spec_cu
);
7559 /* Free the line_header structure *LH, and any arrays and strings it
7562 free_line_header (struct line_header
*lh
)
7564 if (lh
->standard_opcode_lengths
)
7565 xfree (lh
->standard_opcode_lengths
);
7567 /* Remember that all the lh->file_names[i].name pointers are
7568 pointers into debug_line_buffer, and don't need to be freed. */
7570 xfree (lh
->file_names
);
7572 /* Similarly for the include directory names. */
7573 if (lh
->include_dirs
)
7574 xfree (lh
->include_dirs
);
7580 /* Add an entry to LH's include directory table. */
7582 add_include_dir (struct line_header
*lh
, char *include_dir
)
7584 /* Grow the array if necessary. */
7585 if (lh
->include_dirs_size
== 0)
7587 lh
->include_dirs_size
= 1; /* for testing */
7588 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7589 * sizeof (*lh
->include_dirs
));
7591 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7593 lh
->include_dirs_size
*= 2;
7594 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7595 (lh
->include_dirs_size
7596 * sizeof (*lh
->include_dirs
)));
7599 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7603 /* Add an entry to LH's file name table. */
7605 add_file_name (struct line_header
*lh
,
7607 unsigned int dir_index
,
7608 unsigned int mod_time
,
7609 unsigned int length
)
7611 struct file_entry
*fe
;
7613 /* Grow the array if necessary. */
7614 if (lh
->file_names_size
== 0)
7616 lh
->file_names_size
= 1; /* for testing */
7617 lh
->file_names
= xmalloc (lh
->file_names_size
7618 * sizeof (*lh
->file_names
));
7620 else if (lh
->num_file_names
>= lh
->file_names_size
)
7622 lh
->file_names_size
*= 2;
7623 lh
->file_names
= xrealloc (lh
->file_names
,
7624 (lh
->file_names_size
7625 * sizeof (*lh
->file_names
)));
7628 fe
= &lh
->file_names
[lh
->num_file_names
++];
7630 fe
->dir_index
= dir_index
;
7631 fe
->mod_time
= mod_time
;
7632 fe
->length
= length
;
7638 /* Read the statement program header starting at OFFSET in
7639 .debug_line, according to the endianness of ABFD. Return a pointer
7640 to a struct line_header, allocated using xmalloc.
7642 NOTE: the strings in the include directory and file name tables of
7643 the returned object point into debug_line_buffer, and must not be
7645 static struct line_header
*
7646 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7647 struct dwarf2_cu
*cu
)
7649 struct cleanup
*back_to
;
7650 struct line_header
*lh
;
7652 unsigned int bytes_read
, offset_size
;
7654 char *cur_dir
, *cur_file
;
7656 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7658 complaint (&symfile_complaints
, _("missing .debug_line section"));
7662 /* Make sure that at least there's room for the total_length field.
7663 That could be 12 bytes long, but we're just going to fudge that. */
7664 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7666 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7670 lh
= xmalloc (sizeof (*lh
));
7671 memset (lh
, 0, sizeof (*lh
));
7672 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7675 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7677 /* Read in the header. */
7679 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7680 &bytes_read
, &offset_size
);
7681 line_ptr
+= bytes_read
;
7682 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7683 + dwarf2_per_objfile
->line
.size
))
7685 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7688 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7689 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7691 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7692 line_ptr
+= offset_size
;
7693 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7695 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7697 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7699 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7701 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7703 lh
->standard_opcode_lengths
7704 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7706 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7707 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7709 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7713 /* Read directory table. */
7714 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7716 line_ptr
+= bytes_read
;
7717 add_include_dir (lh
, cur_dir
);
7719 line_ptr
+= bytes_read
;
7721 /* Read file name table. */
7722 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7724 unsigned int dir_index
, mod_time
, length
;
7726 line_ptr
+= bytes_read
;
7727 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7728 line_ptr
+= bytes_read
;
7729 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7730 line_ptr
+= bytes_read
;
7731 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7732 line_ptr
+= bytes_read
;
7734 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7736 line_ptr
+= bytes_read
;
7737 lh
->statement_program_start
= line_ptr
;
7739 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7740 + dwarf2_per_objfile
->line
.size
))
7741 complaint (&symfile_complaints
,
7742 _("line number info header doesn't fit in `.debug_line' section"));
7744 discard_cleanups (back_to
);
7748 /* This function exists to work around a bug in certain compilers
7749 (particularly GCC 2.95), in which the first line number marker of a
7750 function does not show up until after the prologue, right before
7751 the second line number marker. This function shifts ADDRESS down
7752 to the beginning of the function if necessary, and is called on
7753 addresses passed to record_line. */
7756 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7758 struct function_range
*fn
;
7760 /* Find the function_range containing address. */
7765 cu
->cached_fn
= cu
->first_fn
;
7769 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7775 while (fn
&& fn
!= cu
->cached_fn
)
7776 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7786 if (address
!= fn
->lowpc
)
7787 complaint (&symfile_complaints
,
7788 _("misplaced first line number at 0x%lx for '%s'"),
7789 (unsigned long) address
, fn
->name
);
7794 /* Decode the Line Number Program (LNP) for the given line_header
7795 structure and CU. The actual information extracted and the type
7796 of structures created from the LNP depends on the value of PST.
7798 1. If PST is NULL, then this procedure uses the data from the program
7799 to create all necessary symbol tables, and their linetables.
7800 The compilation directory of the file is passed in COMP_DIR,
7801 and must not be NULL.
7803 2. If PST is not NULL, this procedure reads the program to determine
7804 the list of files included by the unit represented by PST, and
7805 builds all the associated partial symbol tables. In this case,
7806 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7807 is not used to compute the full name of the symtab, and therefore
7808 omitting it when building the partial symtab does not introduce
7809 the potential for inconsistency - a partial symtab and its associated
7810 symbtab having a different fullname -). */
7813 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
7814 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
7816 gdb_byte
*line_ptr
, *extended_end
;
7818 unsigned int bytes_read
, extended_len
;
7819 unsigned char op_code
, extended_op
, adj_opcode
;
7821 struct objfile
*objfile
= cu
->objfile
;
7822 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7823 const int decode_for_pst_p
= (pst
!= NULL
);
7824 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
7826 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7828 line_ptr
= lh
->statement_program_start
;
7829 line_end
= lh
->statement_program_end
;
7831 /* Read the statement sequences until there's nothing left. */
7832 while (line_ptr
< line_end
)
7834 /* state machine registers */
7835 CORE_ADDR address
= 0;
7836 unsigned int file
= 1;
7837 unsigned int line
= 1;
7838 unsigned int column
= 0;
7839 int is_stmt
= lh
->default_is_stmt
;
7840 int basic_block
= 0;
7841 int end_sequence
= 0;
7844 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7846 /* Start a subfile for the current file of the state machine. */
7847 /* lh->include_dirs and lh->file_names are 0-based, but the
7848 directory and file name numbers in the statement program
7850 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7854 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7856 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7859 /* Decode the table. */
7860 while (!end_sequence
)
7862 op_code
= read_1_byte (abfd
, line_ptr
);
7864 if (line_ptr
> line_end
)
7866 dwarf2_debug_line_missing_end_sequence_complaint ();
7870 if (op_code
>= lh
->opcode_base
)
7872 /* Special operand. */
7873 adj_opcode
= op_code
- lh
->opcode_base
;
7874 address
+= (adj_opcode
/ lh
->line_range
)
7875 * lh
->minimum_instruction_length
;
7876 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7877 if (lh
->num_file_names
< file
|| file
== 0)
7878 dwarf2_debug_line_missing_file_complaint ();
7881 lh
->file_names
[file
- 1].included_p
= 1;
7882 if (!decode_for_pst_p
&& is_stmt
)
7884 if (last_subfile
!= current_subfile
)
7886 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7888 record_line (last_subfile
, 0, addr
);
7889 last_subfile
= current_subfile
;
7891 /* Append row to matrix using current values. */
7892 addr
= check_cu_functions (address
, cu
);
7893 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7894 record_line (current_subfile
, line
, addr
);
7899 else switch (op_code
)
7901 case DW_LNS_extended_op
:
7902 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7903 line_ptr
+= bytes_read
;
7904 extended_end
= line_ptr
+ extended_len
;
7905 extended_op
= read_1_byte (abfd
, line_ptr
);
7907 switch (extended_op
)
7909 case DW_LNE_end_sequence
:
7912 case DW_LNE_set_address
:
7913 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7914 line_ptr
+= bytes_read
;
7915 address
+= baseaddr
;
7917 case DW_LNE_define_file
:
7920 unsigned int dir_index
, mod_time
, length
;
7922 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
7923 line_ptr
+= bytes_read
;
7925 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7926 line_ptr
+= bytes_read
;
7928 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7929 line_ptr
+= bytes_read
;
7931 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7932 line_ptr
+= bytes_read
;
7933 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7936 case DW_LNE_set_discriminator
:
7937 /* The discriminator is not interesting to the debugger;
7939 line_ptr
= extended_end
;
7942 complaint (&symfile_complaints
,
7943 _("mangled .debug_line section"));
7946 /* Make sure that we parsed the extended op correctly. If e.g.
7947 we expected a different address size than the producer used,
7948 we may have read the wrong number of bytes. */
7949 if (line_ptr
!= extended_end
)
7951 complaint (&symfile_complaints
,
7952 _("mangled .debug_line section"));
7957 if (lh
->num_file_names
< file
|| file
== 0)
7958 dwarf2_debug_line_missing_file_complaint ();
7961 lh
->file_names
[file
- 1].included_p
= 1;
7962 if (!decode_for_pst_p
&& is_stmt
)
7964 if (last_subfile
!= current_subfile
)
7966 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7968 record_line (last_subfile
, 0, addr
);
7969 last_subfile
= current_subfile
;
7971 addr
= check_cu_functions (address
, cu
);
7972 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7973 record_line (current_subfile
, line
, addr
);
7978 case DW_LNS_advance_pc
:
7979 address
+= lh
->minimum_instruction_length
7980 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7981 line_ptr
+= bytes_read
;
7983 case DW_LNS_advance_line
:
7984 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
7985 line_ptr
+= bytes_read
;
7987 case DW_LNS_set_file
:
7989 /* The arrays lh->include_dirs and lh->file_names are
7990 0-based, but the directory and file name numbers in
7991 the statement program are 1-based. */
7992 struct file_entry
*fe
;
7995 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7996 line_ptr
+= bytes_read
;
7997 if (lh
->num_file_names
< file
|| file
== 0)
7998 dwarf2_debug_line_missing_file_complaint ();
8001 fe
= &lh
->file_names
[file
- 1];
8003 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8004 if (!decode_for_pst_p
)
8006 last_subfile
= current_subfile
;
8007 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8012 case DW_LNS_set_column
:
8013 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8014 line_ptr
+= bytes_read
;
8016 case DW_LNS_negate_stmt
:
8017 is_stmt
= (!is_stmt
);
8019 case DW_LNS_set_basic_block
:
8022 /* Add to the address register of the state machine the
8023 address increment value corresponding to special opcode
8024 255. I.e., this value is scaled by the minimum
8025 instruction length since special opcode 255 would have
8026 scaled the the increment. */
8027 case DW_LNS_const_add_pc
:
8028 address
+= (lh
->minimum_instruction_length
8029 * ((255 - lh
->opcode_base
) / lh
->line_range
));
8031 case DW_LNS_fixed_advance_pc
:
8032 address
+= read_2_bytes (abfd
, line_ptr
);
8037 /* Unknown standard opcode, ignore it. */
8040 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8042 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8043 line_ptr
+= bytes_read
;
8048 if (lh
->num_file_names
< file
|| file
== 0)
8049 dwarf2_debug_line_missing_file_complaint ();
8052 lh
->file_names
[file
- 1].included_p
= 1;
8053 if (!decode_for_pst_p
)
8055 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8056 record_line (current_subfile
, 0, addr
);
8061 if (decode_for_pst_p
)
8065 /* Now that we're done scanning the Line Header Program, we can
8066 create the psymtab of each included file. */
8067 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8068 if (lh
->file_names
[file_index
].included_p
== 1)
8070 const struct file_entry fe
= lh
->file_names
[file_index
];
8071 char *include_name
= fe
.name
;
8072 char *dir_name
= NULL
;
8073 char *pst_filename
= pst
->filename
;
8076 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8078 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8080 include_name
= concat (dir_name
, SLASH_STRING
,
8081 include_name
, (char *)NULL
);
8082 make_cleanup (xfree
, include_name
);
8085 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8087 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8088 pst_filename
, (char *)NULL
);
8089 make_cleanup (xfree
, pst_filename
);
8092 if (strcmp (include_name
, pst_filename
) != 0)
8093 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8098 /* Make sure a symtab is created for every file, even files
8099 which contain only variables (i.e. no code with associated
8103 struct file_entry
*fe
;
8105 for (i
= 0; i
< lh
->num_file_names
; i
++)
8108 fe
= &lh
->file_names
[i
];
8110 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8111 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8113 /* Skip the main file; we don't need it, and it must be
8114 allocated last, so that it will show up before the
8115 non-primary symtabs in the objfile's symtab list. */
8116 if (current_subfile
== first_subfile
)
8119 if (current_subfile
->symtab
== NULL
)
8120 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8122 fe
->symtab
= current_subfile
->symtab
;
8127 /* Start a subfile for DWARF. FILENAME is the name of the file and
8128 DIRNAME the name of the source directory which contains FILENAME
8129 or NULL if not known. COMP_DIR is the compilation directory for the
8130 linetable's compilation unit or NULL if not known.
8131 This routine tries to keep line numbers from identical absolute and
8132 relative file names in a common subfile.
8134 Using the `list' example from the GDB testsuite, which resides in
8135 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8136 of /srcdir/list0.c yields the following debugging information for list0.c:
8138 DW_AT_name: /srcdir/list0.c
8139 DW_AT_comp_dir: /compdir
8140 files.files[0].name: list0.h
8141 files.files[0].dir: /srcdir
8142 files.files[1].name: list0.c
8143 files.files[1].dir: /srcdir
8145 The line number information for list0.c has to end up in a single
8146 subfile, so that `break /srcdir/list0.c:1' works as expected.
8147 start_subfile will ensure that this happens provided that we pass the
8148 concatenation of files.files[1].dir and files.files[1].name as the
8152 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8156 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8157 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8158 second argument to start_subfile. To be consistent, we do the
8159 same here. In order not to lose the line information directory,
8160 we concatenate it to the filename when it makes sense.
8161 Note that the Dwarf3 standard says (speaking of filenames in line
8162 information): ``The directory index is ignored for file names
8163 that represent full path names''. Thus ignoring dirname in the
8164 `else' branch below isn't an issue. */
8166 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8167 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8169 fullname
= filename
;
8171 start_subfile (fullname
, comp_dir
);
8173 if (fullname
!= filename
)
8178 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8179 struct dwarf2_cu
*cu
)
8181 struct objfile
*objfile
= cu
->objfile
;
8182 struct comp_unit_head
*cu_header
= &cu
->header
;
8184 /* NOTE drow/2003-01-30: There used to be a comment and some special
8185 code here to turn a symbol with DW_AT_external and a
8186 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8187 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8188 with some versions of binutils) where shared libraries could have
8189 relocations against symbols in their debug information - the
8190 minimal symbol would have the right address, but the debug info
8191 would not. It's no longer necessary, because we will explicitly
8192 apply relocations when we read in the debug information now. */
8194 /* A DW_AT_location attribute with no contents indicates that a
8195 variable has been optimized away. */
8196 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8198 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8202 /* Handle one degenerate form of location expression specially, to
8203 preserve GDB's previous behavior when section offsets are
8204 specified. If this is just a DW_OP_addr then mark this symbol
8207 if (attr_form_is_block (attr
)
8208 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8209 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8213 SYMBOL_VALUE_ADDRESS (sym
) =
8214 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8215 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8216 fixup_symbol_section (sym
, objfile
);
8217 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8218 SYMBOL_SECTION (sym
));
8222 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8223 expression evaluator, and use LOC_COMPUTED only when necessary
8224 (i.e. when the value of a register or memory location is
8225 referenced, or a thread-local block, etc.). Then again, it might
8226 not be worthwhile. I'm assuming that it isn't unless performance
8227 or memory numbers show me otherwise. */
8229 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8230 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8233 /* Given a pointer to a DWARF information entry, figure out if we need
8234 to make a symbol table entry for it, and if so, create a new entry
8235 and return a pointer to it.
8236 If TYPE is NULL, determine symbol type from the die, otherwise
8237 used the passed type. */
8239 static struct symbol
*
8240 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8242 struct objfile
*objfile
= cu
->objfile
;
8243 struct symbol
*sym
= NULL
;
8245 struct attribute
*attr
= NULL
;
8246 struct attribute
*attr2
= NULL
;
8248 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8250 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8252 if (die
->tag
!= DW_TAG_namespace
)
8253 name
= dwarf2_linkage_name (die
, cu
);
8255 name
= TYPE_NAME (type
);
8259 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8260 sizeof (struct symbol
));
8261 OBJSTAT (objfile
, n_syms
++);
8262 memset (sym
, 0, sizeof (struct symbol
));
8264 /* Cache this symbol's name and the name's demangled form (if any). */
8265 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8266 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
8268 /* Default assumptions.
8269 Use the passed type or decode it from the die. */
8270 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8271 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8273 SYMBOL_TYPE (sym
) = type
;
8275 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8276 attr
= dwarf2_attr (die
,
8277 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8281 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8284 attr
= dwarf2_attr (die
,
8285 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8289 int file_index
= DW_UNSND (attr
);
8290 if (cu
->line_header
== NULL
8291 || file_index
> cu
->line_header
->num_file_names
)
8292 complaint (&symfile_complaints
,
8293 _("file index out of range"));
8294 else if (file_index
> 0)
8296 struct file_entry
*fe
;
8297 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8298 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8305 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8308 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8310 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8312 case DW_TAG_subprogram
:
8313 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8315 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8316 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8317 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8318 || cu
->language
== language_ada
)
8320 /* Subprograms marked external are stored as a global symbol.
8321 Ada subprograms, whether marked external or not, are always
8322 stored as a global symbol, because we want to be able to
8323 access them globally. For instance, we want to be able
8324 to break on a nested subprogram without having to
8325 specify the context. */
8326 add_symbol_to_list (sym
, &global_symbols
);
8330 add_symbol_to_list (sym
, cu
->list_in_scope
);
8333 case DW_TAG_inlined_subroutine
:
8334 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8336 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8337 SYMBOL_INLINED (sym
) = 1;
8338 /* Do not add the symbol to any lists. It will be found via
8339 BLOCK_FUNCTION from the blockvector. */
8341 case DW_TAG_variable
:
8342 /* Compilation with minimal debug info may result in variables
8343 with missing type entries. Change the misleading `void' type
8344 to something sensible. */
8345 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8347 = objfile_type (objfile
)->nodebug_data_symbol
;
8349 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8352 dwarf2_const_value (attr
, sym
, cu
);
8353 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8354 if (attr2
&& (DW_UNSND (attr2
) != 0))
8355 add_symbol_to_list (sym
, &global_symbols
);
8357 add_symbol_to_list (sym
, cu
->list_in_scope
);
8360 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8363 var_decode_location (attr
, sym
, cu
);
8364 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8365 if (attr2
&& (DW_UNSND (attr2
) != 0))
8366 add_symbol_to_list (sym
, &global_symbols
);
8368 add_symbol_to_list (sym
, cu
->list_in_scope
);
8372 /* We do not know the address of this symbol.
8373 If it is an external symbol and we have type information
8374 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8375 The address of the variable will then be determined from
8376 the minimal symbol table whenever the variable is
8378 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8379 if (attr2
&& (DW_UNSND (attr2
) != 0)
8380 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8382 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8383 add_symbol_to_list (sym
, cu
->list_in_scope
);
8385 else if (!die_is_declaration (die
, cu
))
8387 /* Use the default LOC_OPTIMIZED_OUT class. */
8388 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8389 add_symbol_to_list (sym
, cu
->list_in_scope
);
8393 case DW_TAG_formal_parameter
:
8394 /* If we are inside a function, mark this as an argument. If
8395 not, we might be looking at an argument to an inlined function
8396 when we do not have enough information to show inlined frames;
8397 pretend it's a local variable in that case so that the user can
8399 if (context_stack_depth
> 0
8400 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8401 SYMBOL_IS_ARGUMENT (sym
) = 1;
8402 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8405 var_decode_location (attr
, sym
, cu
);
8407 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8410 dwarf2_const_value (attr
, sym
, cu
);
8412 add_symbol_to_list (sym
, cu
->list_in_scope
);
8414 case DW_TAG_unspecified_parameters
:
8415 /* From varargs functions; gdb doesn't seem to have any
8416 interest in this information, so just ignore it for now.
8419 case DW_TAG_class_type
:
8420 case DW_TAG_interface_type
:
8421 case DW_TAG_structure_type
:
8422 case DW_TAG_union_type
:
8423 case DW_TAG_set_type
:
8424 case DW_TAG_enumeration_type
:
8425 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8426 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8428 /* Make sure that the symbol includes appropriate enclosing
8429 classes/namespaces in its name. These are calculated in
8430 read_structure_type, and the correct name is saved in
8433 if (cu
->language
== language_cplus
8434 || cu
->language
== language_java
)
8436 struct type
*type
= SYMBOL_TYPE (sym
);
8438 if (TYPE_TAG_NAME (type
) != NULL
)
8440 /* FIXME: carlton/2003-11-10: Should this use
8441 SYMBOL_SET_NAMES instead? (The same problem also
8442 arises further down in this function.) */
8443 /* The type's name is already allocated along with
8444 this objfile, so we don't need to duplicate it
8446 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8451 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8452 really ever be static objects: otherwise, if you try
8453 to, say, break of a class's method and you're in a file
8454 which doesn't mention that class, it won't work unless
8455 the check for all static symbols in lookup_symbol_aux
8456 saves you. See the OtherFileClass tests in
8457 gdb.c++/namespace.exp. */
8459 struct pending
**list_to_add
;
8461 list_to_add
= (cu
->list_in_scope
== &file_symbols
8462 && (cu
->language
== language_cplus
8463 || cu
->language
== language_java
)
8464 ? &global_symbols
: cu
->list_in_scope
);
8466 add_symbol_to_list (sym
, list_to_add
);
8468 /* The semantics of C++ state that "struct foo { ... }" also
8469 defines a typedef for "foo". A Java class declaration also
8470 defines a typedef for the class. */
8471 if (cu
->language
== language_cplus
8472 || cu
->language
== language_java
8473 || cu
->language
== language_ada
)
8475 /* The symbol's name is already allocated along with
8476 this objfile, so we don't need to duplicate it for
8478 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8479 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8483 case DW_TAG_typedef
:
8484 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8485 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8486 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8487 add_symbol_to_list (sym
, cu
->list_in_scope
);
8489 case DW_TAG_base_type
:
8490 case DW_TAG_subrange_type
:
8491 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8492 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8493 add_symbol_to_list (sym
, cu
->list_in_scope
);
8495 case DW_TAG_enumerator
:
8496 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8497 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8500 dwarf2_const_value (attr
, sym
, cu
);
8503 /* NOTE: carlton/2003-11-10: See comment above in the
8504 DW_TAG_class_type, etc. block. */
8506 struct pending
**list_to_add
;
8508 list_to_add
= (cu
->list_in_scope
== &file_symbols
8509 && (cu
->language
== language_cplus
8510 || cu
->language
== language_java
)
8511 ? &global_symbols
: cu
->list_in_scope
);
8513 add_symbol_to_list (sym
, list_to_add
);
8516 case DW_TAG_namespace
:
8517 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8518 add_symbol_to_list (sym
, &global_symbols
);
8521 /* Not a tag we recognize. Hopefully we aren't processing
8522 trash data, but since we must specifically ignore things
8523 we don't recognize, there is nothing else we should do at
8525 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8526 dwarf_tag_name (die
->tag
));
8530 /* For the benefit of old versions of GCC, check for anonymous
8531 namespaces based on the demangled name. */
8532 if (!processing_has_namespace_info
8533 && cu
->language
== language_cplus
8534 && dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
) != NULL
)
8535 cp_scan_for_anonymous_namespaces (sym
);
8540 /* Copy constant value from an attribute to a symbol. */
8543 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8544 struct dwarf2_cu
*cu
)
8546 struct objfile
*objfile
= cu
->objfile
;
8547 struct comp_unit_head
*cu_header
= &cu
->header
;
8548 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8549 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8550 struct dwarf_block
*blk
;
8555 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8556 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8557 cu_header
->addr_size
,
8558 TYPE_LENGTH (SYMBOL_TYPE
8560 SYMBOL_VALUE_BYTES (sym
) =
8561 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8562 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8563 it's body - store_unsigned_integer. */
8564 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8565 byte_order
, DW_ADDR (attr
));
8566 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8568 case DW_FORM_string
:
8570 /* DW_STRING is already allocated on the obstack, point directly
8572 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8573 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8575 case DW_FORM_block1
:
8576 case DW_FORM_block2
:
8577 case DW_FORM_block4
:
8579 blk
= DW_BLOCK (attr
);
8580 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8581 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8583 TYPE_LENGTH (SYMBOL_TYPE
8585 SYMBOL_VALUE_BYTES (sym
) =
8586 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8587 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8588 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8591 /* The DW_AT_const_value attributes are supposed to carry the
8592 symbol's value "represented as it would be on the target
8593 architecture." By the time we get here, it's already been
8594 converted to host endianness, so we just need to sign- or
8595 zero-extend it as appropriate. */
8597 dwarf2_const_value_data (attr
, sym
, 8);
8600 dwarf2_const_value_data (attr
, sym
, 16);
8603 dwarf2_const_value_data (attr
, sym
, 32);
8606 dwarf2_const_value_data (attr
, sym
, 64);
8610 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8611 SYMBOL_CLASS (sym
) = LOC_CONST
;
8615 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8616 SYMBOL_CLASS (sym
) = LOC_CONST
;
8620 complaint (&symfile_complaints
,
8621 _("unsupported const value attribute form: '%s'"),
8622 dwarf_form_name (attr
->form
));
8623 SYMBOL_VALUE (sym
) = 0;
8624 SYMBOL_CLASS (sym
) = LOC_CONST
;
8630 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8631 or zero-extend it as appropriate for the symbol's type. */
8633 dwarf2_const_value_data (struct attribute
*attr
,
8637 LONGEST l
= DW_UNSND (attr
);
8639 if (bits
< sizeof (l
) * 8)
8641 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8642 l
&= ((LONGEST
) 1 << bits
) - 1;
8644 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8647 SYMBOL_VALUE (sym
) = l
;
8648 SYMBOL_CLASS (sym
) = LOC_CONST
;
8652 /* Return the type of the die in question using its DW_AT_type attribute. */
8654 static struct type
*
8655 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8658 struct attribute
*type_attr
;
8659 struct die_info
*type_die
;
8661 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8664 /* A missing DW_AT_type represents a void type. */
8665 return objfile_type (cu
->objfile
)->builtin_void
;
8668 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8670 type
= tag_type_to_type (type_die
, cu
);
8673 dump_die_for_error (type_die
);
8674 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8680 /* Return the containing type of the die in question using its
8681 DW_AT_containing_type attribute. */
8683 static struct type
*
8684 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8686 struct type
*type
= NULL
;
8687 struct attribute
*type_attr
;
8688 struct die_info
*type_die
= NULL
;
8690 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8693 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8694 type
= tag_type_to_type (type_die
, cu
);
8699 dump_die_for_error (type_die
);
8700 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8706 static struct type
*
8707 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8709 struct type
*this_type
;
8711 this_type
= read_type_die (die
, cu
);
8714 dump_die_for_error (die
);
8715 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8721 static struct type
*
8722 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8724 struct type
*this_type
;
8726 this_type
= get_die_type (die
, cu
);
8732 case DW_TAG_class_type
:
8733 case DW_TAG_interface_type
:
8734 case DW_TAG_structure_type
:
8735 case DW_TAG_union_type
:
8736 this_type
= read_structure_type (die
, cu
);
8738 case DW_TAG_enumeration_type
:
8739 this_type
= read_enumeration_type (die
, cu
);
8741 case DW_TAG_subprogram
:
8742 case DW_TAG_subroutine_type
:
8743 case DW_TAG_inlined_subroutine
:
8744 this_type
= read_subroutine_type (die
, cu
);
8746 case DW_TAG_array_type
:
8747 this_type
= read_array_type (die
, cu
);
8749 case DW_TAG_set_type
:
8750 this_type
= read_set_type (die
, cu
);
8752 case DW_TAG_pointer_type
:
8753 this_type
= read_tag_pointer_type (die
, cu
);
8755 case DW_TAG_ptr_to_member_type
:
8756 this_type
= read_tag_ptr_to_member_type (die
, cu
);
8758 case DW_TAG_reference_type
:
8759 this_type
= read_tag_reference_type (die
, cu
);
8761 case DW_TAG_const_type
:
8762 this_type
= read_tag_const_type (die
, cu
);
8764 case DW_TAG_volatile_type
:
8765 this_type
= read_tag_volatile_type (die
, cu
);
8767 case DW_TAG_string_type
:
8768 this_type
= read_tag_string_type (die
, cu
);
8770 case DW_TAG_typedef
:
8771 this_type
= read_typedef (die
, cu
);
8773 case DW_TAG_subrange_type
:
8774 this_type
= read_subrange_type (die
, cu
);
8776 case DW_TAG_base_type
:
8777 this_type
= read_base_type (die
, cu
);
8779 case DW_TAG_unspecified_type
:
8780 this_type
= read_unspecified_type (die
, cu
);
8782 case DW_TAG_namespace
:
8783 this_type
= read_namespace_type (die
, cu
);
8786 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
8787 dwarf_tag_name (die
->tag
));
8794 /* Return the name of the namespace/class that DIE is defined within,
8795 or "" if we can't tell. The caller should not xfree the result.
8797 For example, if we're within the method foo() in the following
8807 then determine_prefix on foo's die will return "N::C". */
8810 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
8812 struct die_info
*parent
, *spec_die
;
8813 struct dwarf2_cu
*spec_cu
;
8814 struct type
*parent_type
;
8816 if (cu
->language
!= language_cplus
8817 && cu
->language
!= language_java
)
8820 /* We have to be careful in the presence of DW_AT_specification.
8821 For example, with GCC 3.4, given the code
8825 // Definition of N::foo.
8829 then we'll have a tree of DIEs like this:
8831 1: DW_TAG_compile_unit
8832 2: DW_TAG_namespace // N
8833 3: DW_TAG_subprogram // declaration of N::foo
8834 4: DW_TAG_subprogram // definition of N::foo
8835 DW_AT_specification // refers to die #3
8837 Thus, when processing die #4, we have to pretend that we're in
8838 the context of its DW_AT_specification, namely the contex of die
8841 spec_die
= die_specification (die
, &spec_cu
);
8842 if (spec_die
== NULL
)
8843 parent
= die
->parent
;
8846 parent
= spec_die
->parent
;
8853 switch (parent
->tag
)
8855 case DW_TAG_namespace
:
8856 parent_type
= read_type_die (parent
, cu
);
8857 /* We give a name to even anonymous namespaces. */
8858 return TYPE_TAG_NAME (parent_type
);
8859 case DW_TAG_class_type
:
8860 case DW_TAG_interface_type
:
8861 case DW_TAG_structure_type
:
8862 case DW_TAG_union_type
:
8863 parent_type
= read_type_die (parent
, cu
);
8864 if (TYPE_TAG_NAME (parent_type
) != NULL
)
8865 return TYPE_TAG_NAME (parent_type
);
8867 /* An anonymous structure is only allowed non-static data
8868 members; no typedefs, no member functions, et cetera.
8869 So it does not need a prefix. */
8872 return determine_prefix (parent
, cu
);
8876 /* Return a newly-allocated string formed by concatenating PREFIX and
8877 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8878 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8879 perform an obconcat, otherwise allocate storage for the result. The CU argument
8880 is used to determine the language and hence, the appropriate separator. */
8882 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8885 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
8886 struct dwarf2_cu
*cu
)
8890 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
8892 else if (cu
->language
== language_java
)
8904 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
8905 strcpy (retval
, prefix
);
8906 strcat (retval
, sep
);
8907 strcat (retval
, suffix
);
8912 /* We have an obstack. */
8913 return obconcat (obs
, prefix
, sep
, suffix
);
8917 /* Return sibling of die, NULL if no sibling. */
8919 static struct die_info
*
8920 sibling_die (struct die_info
*die
)
8922 return die
->sibling
;
8925 /* Get linkage name of a die, return NULL if not found. */
8928 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8930 struct attribute
*attr
;
8932 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8933 if (attr
&& DW_STRING (attr
))
8934 return DW_STRING (attr
);
8935 return dwarf2_name (die
, cu
);
8938 /* Get name of a die, return NULL if not found. */
8941 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
8942 struct obstack
*obstack
)
8944 if (name
&& cu
->language
== language_cplus
)
8946 char *canon_name
= cp_canonicalize_string (name
);
8948 if (canon_name
!= NULL
)
8950 if (strcmp (canon_name
, name
) != 0)
8951 name
= obsavestring (canon_name
, strlen (canon_name
),
8960 /* Get name of a die, return NULL if not found. */
8963 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8965 struct attribute
*attr
;
8967 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8968 if (!attr
|| !DW_STRING (attr
))
8973 case DW_TAG_compile_unit
:
8974 /* Compilation units have a DW_AT_name that is a filename, not
8975 a source language identifier. */
8976 case DW_TAG_enumeration_type
:
8977 case DW_TAG_enumerator
:
8978 /* These tags always have simple identifiers already; no need
8979 to canonicalize them. */
8980 return DW_STRING (attr
);
8982 if (!DW_STRING_IS_CANONICAL (attr
))
8985 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
8986 &cu
->objfile
->objfile_obstack
);
8987 DW_STRING_IS_CANONICAL (attr
) = 1;
8989 return DW_STRING (attr
);
8993 /* Return the die that this die in an extension of, or NULL if there
8994 is none. *EXT_CU is the CU containing DIE on input, and the CU
8995 containing the return value on output. */
8997 static struct die_info
*
8998 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9000 struct attribute
*attr
;
9002 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9006 return follow_die_ref (die
, attr
, ext_cu
);
9009 /* Convert a DIE tag into its string name. */
9012 dwarf_tag_name (unsigned tag
)
9016 case DW_TAG_padding
:
9017 return "DW_TAG_padding";
9018 case DW_TAG_array_type
:
9019 return "DW_TAG_array_type";
9020 case DW_TAG_class_type
:
9021 return "DW_TAG_class_type";
9022 case DW_TAG_entry_point
:
9023 return "DW_TAG_entry_point";
9024 case DW_TAG_enumeration_type
:
9025 return "DW_TAG_enumeration_type";
9026 case DW_TAG_formal_parameter
:
9027 return "DW_TAG_formal_parameter";
9028 case DW_TAG_imported_declaration
:
9029 return "DW_TAG_imported_declaration";
9031 return "DW_TAG_label";
9032 case DW_TAG_lexical_block
:
9033 return "DW_TAG_lexical_block";
9035 return "DW_TAG_member";
9036 case DW_TAG_pointer_type
:
9037 return "DW_TAG_pointer_type";
9038 case DW_TAG_reference_type
:
9039 return "DW_TAG_reference_type";
9040 case DW_TAG_compile_unit
:
9041 return "DW_TAG_compile_unit";
9042 case DW_TAG_string_type
:
9043 return "DW_TAG_string_type";
9044 case DW_TAG_structure_type
:
9045 return "DW_TAG_structure_type";
9046 case DW_TAG_subroutine_type
:
9047 return "DW_TAG_subroutine_type";
9048 case DW_TAG_typedef
:
9049 return "DW_TAG_typedef";
9050 case DW_TAG_union_type
:
9051 return "DW_TAG_union_type";
9052 case DW_TAG_unspecified_parameters
:
9053 return "DW_TAG_unspecified_parameters";
9054 case DW_TAG_variant
:
9055 return "DW_TAG_variant";
9056 case DW_TAG_common_block
:
9057 return "DW_TAG_common_block";
9058 case DW_TAG_common_inclusion
:
9059 return "DW_TAG_common_inclusion";
9060 case DW_TAG_inheritance
:
9061 return "DW_TAG_inheritance";
9062 case DW_TAG_inlined_subroutine
:
9063 return "DW_TAG_inlined_subroutine";
9065 return "DW_TAG_module";
9066 case DW_TAG_ptr_to_member_type
:
9067 return "DW_TAG_ptr_to_member_type";
9068 case DW_TAG_set_type
:
9069 return "DW_TAG_set_type";
9070 case DW_TAG_subrange_type
:
9071 return "DW_TAG_subrange_type";
9072 case DW_TAG_with_stmt
:
9073 return "DW_TAG_with_stmt";
9074 case DW_TAG_access_declaration
:
9075 return "DW_TAG_access_declaration";
9076 case DW_TAG_base_type
:
9077 return "DW_TAG_base_type";
9078 case DW_TAG_catch_block
:
9079 return "DW_TAG_catch_block";
9080 case DW_TAG_const_type
:
9081 return "DW_TAG_const_type";
9082 case DW_TAG_constant
:
9083 return "DW_TAG_constant";
9084 case DW_TAG_enumerator
:
9085 return "DW_TAG_enumerator";
9086 case DW_TAG_file_type
:
9087 return "DW_TAG_file_type";
9089 return "DW_TAG_friend";
9090 case DW_TAG_namelist
:
9091 return "DW_TAG_namelist";
9092 case DW_TAG_namelist_item
:
9093 return "DW_TAG_namelist_item";
9094 case DW_TAG_packed_type
:
9095 return "DW_TAG_packed_type";
9096 case DW_TAG_subprogram
:
9097 return "DW_TAG_subprogram";
9098 case DW_TAG_template_type_param
:
9099 return "DW_TAG_template_type_param";
9100 case DW_TAG_template_value_param
:
9101 return "DW_TAG_template_value_param";
9102 case DW_TAG_thrown_type
:
9103 return "DW_TAG_thrown_type";
9104 case DW_TAG_try_block
:
9105 return "DW_TAG_try_block";
9106 case DW_TAG_variant_part
:
9107 return "DW_TAG_variant_part";
9108 case DW_TAG_variable
:
9109 return "DW_TAG_variable";
9110 case DW_TAG_volatile_type
:
9111 return "DW_TAG_volatile_type";
9112 case DW_TAG_dwarf_procedure
:
9113 return "DW_TAG_dwarf_procedure";
9114 case DW_TAG_restrict_type
:
9115 return "DW_TAG_restrict_type";
9116 case DW_TAG_interface_type
:
9117 return "DW_TAG_interface_type";
9118 case DW_TAG_namespace
:
9119 return "DW_TAG_namespace";
9120 case DW_TAG_imported_module
:
9121 return "DW_TAG_imported_module";
9122 case DW_TAG_unspecified_type
:
9123 return "DW_TAG_unspecified_type";
9124 case DW_TAG_partial_unit
:
9125 return "DW_TAG_partial_unit";
9126 case DW_TAG_imported_unit
:
9127 return "DW_TAG_imported_unit";
9128 case DW_TAG_condition
:
9129 return "DW_TAG_condition";
9130 case DW_TAG_shared_type
:
9131 return "DW_TAG_shared_type";
9132 case DW_TAG_type_unit
:
9133 return "DW_TAG_type_unit";
9134 case DW_TAG_MIPS_loop
:
9135 return "DW_TAG_MIPS_loop";
9136 case DW_TAG_HP_array_descriptor
:
9137 return "DW_TAG_HP_array_descriptor";
9138 case DW_TAG_format_label
:
9139 return "DW_TAG_format_label";
9140 case DW_TAG_function_template
:
9141 return "DW_TAG_function_template";
9142 case DW_TAG_class_template
:
9143 return "DW_TAG_class_template";
9144 case DW_TAG_GNU_BINCL
:
9145 return "DW_TAG_GNU_BINCL";
9146 case DW_TAG_GNU_EINCL
:
9147 return "DW_TAG_GNU_EINCL";
9148 case DW_TAG_upc_shared_type
:
9149 return "DW_TAG_upc_shared_type";
9150 case DW_TAG_upc_strict_type
:
9151 return "DW_TAG_upc_strict_type";
9152 case DW_TAG_upc_relaxed_type
:
9153 return "DW_TAG_upc_relaxed_type";
9154 case DW_TAG_PGI_kanji_type
:
9155 return "DW_TAG_PGI_kanji_type";
9156 case DW_TAG_PGI_interface_block
:
9157 return "DW_TAG_PGI_interface_block";
9159 return "DW_TAG_<unknown>";
9163 /* Convert a DWARF attribute code into its string name. */
9166 dwarf_attr_name (unsigned attr
)
9171 return "DW_AT_sibling";
9172 case DW_AT_location
:
9173 return "DW_AT_location";
9175 return "DW_AT_name";
9176 case DW_AT_ordering
:
9177 return "DW_AT_ordering";
9178 case DW_AT_subscr_data
:
9179 return "DW_AT_subscr_data";
9180 case DW_AT_byte_size
:
9181 return "DW_AT_byte_size";
9182 case DW_AT_bit_offset
:
9183 return "DW_AT_bit_offset";
9184 case DW_AT_bit_size
:
9185 return "DW_AT_bit_size";
9186 case DW_AT_element_list
:
9187 return "DW_AT_element_list";
9188 case DW_AT_stmt_list
:
9189 return "DW_AT_stmt_list";
9191 return "DW_AT_low_pc";
9193 return "DW_AT_high_pc";
9194 case DW_AT_language
:
9195 return "DW_AT_language";
9197 return "DW_AT_member";
9199 return "DW_AT_discr";
9200 case DW_AT_discr_value
:
9201 return "DW_AT_discr_value";
9202 case DW_AT_visibility
:
9203 return "DW_AT_visibility";
9205 return "DW_AT_import";
9206 case DW_AT_string_length
:
9207 return "DW_AT_string_length";
9208 case DW_AT_common_reference
:
9209 return "DW_AT_common_reference";
9210 case DW_AT_comp_dir
:
9211 return "DW_AT_comp_dir";
9212 case DW_AT_const_value
:
9213 return "DW_AT_const_value";
9214 case DW_AT_containing_type
:
9215 return "DW_AT_containing_type";
9216 case DW_AT_default_value
:
9217 return "DW_AT_default_value";
9219 return "DW_AT_inline";
9220 case DW_AT_is_optional
:
9221 return "DW_AT_is_optional";
9222 case DW_AT_lower_bound
:
9223 return "DW_AT_lower_bound";
9224 case DW_AT_producer
:
9225 return "DW_AT_producer";
9226 case DW_AT_prototyped
:
9227 return "DW_AT_prototyped";
9228 case DW_AT_return_addr
:
9229 return "DW_AT_return_addr";
9230 case DW_AT_start_scope
:
9231 return "DW_AT_start_scope";
9232 case DW_AT_bit_stride
:
9233 return "DW_AT_bit_stride";
9234 case DW_AT_upper_bound
:
9235 return "DW_AT_upper_bound";
9236 case DW_AT_abstract_origin
:
9237 return "DW_AT_abstract_origin";
9238 case DW_AT_accessibility
:
9239 return "DW_AT_accessibility";
9240 case DW_AT_address_class
:
9241 return "DW_AT_address_class";
9242 case DW_AT_artificial
:
9243 return "DW_AT_artificial";
9244 case DW_AT_base_types
:
9245 return "DW_AT_base_types";
9246 case DW_AT_calling_convention
:
9247 return "DW_AT_calling_convention";
9249 return "DW_AT_count";
9250 case DW_AT_data_member_location
:
9251 return "DW_AT_data_member_location";
9252 case DW_AT_decl_column
:
9253 return "DW_AT_decl_column";
9254 case DW_AT_decl_file
:
9255 return "DW_AT_decl_file";
9256 case DW_AT_decl_line
:
9257 return "DW_AT_decl_line";
9258 case DW_AT_declaration
:
9259 return "DW_AT_declaration";
9260 case DW_AT_discr_list
:
9261 return "DW_AT_discr_list";
9262 case DW_AT_encoding
:
9263 return "DW_AT_encoding";
9264 case DW_AT_external
:
9265 return "DW_AT_external";
9266 case DW_AT_frame_base
:
9267 return "DW_AT_frame_base";
9269 return "DW_AT_friend";
9270 case DW_AT_identifier_case
:
9271 return "DW_AT_identifier_case";
9272 case DW_AT_macro_info
:
9273 return "DW_AT_macro_info";
9274 case DW_AT_namelist_items
:
9275 return "DW_AT_namelist_items";
9276 case DW_AT_priority
:
9277 return "DW_AT_priority";
9279 return "DW_AT_segment";
9280 case DW_AT_specification
:
9281 return "DW_AT_specification";
9282 case DW_AT_static_link
:
9283 return "DW_AT_static_link";
9285 return "DW_AT_type";
9286 case DW_AT_use_location
:
9287 return "DW_AT_use_location";
9288 case DW_AT_variable_parameter
:
9289 return "DW_AT_variable_parameter";
9290 case DW_AT_virtuality
:
9291 return "DW_AT_virtuality";
9292 case DW_AT_vtable_elem_location
:
9293 return "DW_AT_vtable_elem_location";
9294 /* DWARF 3 values. */
9295 case DW_AT_allocated
:
9296 return "DW_AT_allocated";
9297 case DW_AT_associated
:
9298 return "DW_AT_associated";
9299 case DW_AT_data_location
:
9300 return "DW_AT_data_location";
9301 case DW_AT_byte_stride
:
9302 return "DW_AT_byte_stride";
9303 case DW_AT_entry_pc
:
9304 return "DW_AT_entry_pc";
9305 case DW_AT_use_UTF8
:
9306 return "DW_AT_use_UTF8";
9307 case DW_AT_extension
:
9308 return "DW_AT_extension";
9310 return "DW_AT_ranges";
9311 case DW_AT_trampoline
:
9312 return "DW_AT_trampoline";
9313 case DW_AT_call_column
:
9314 return "DW_AT_call_column";
9315 case DW_AT_call_file
:
9316 return "DW_AT_call_file";
9317 case DW_AT_call_line
:
9318 return "DW_AT_call_line";
9319 case DW_AT_description
:
9320 return "DW_AT_description";
9321 case DW_AT_binary_scale
:
9322 return "DW_AT_binary_scale";
9323 case DW_AT_decimal_scale
:
9324 return "DW_AT_decimal_scale";
9326 return "DW_AT_small";
9327 case DW_AT_decimal_sign
:
9328 return "DW_AT_decimal_sign";
9329 case DW_AT_digit_count
:
9330 return "DW_AT_digit_count";
9331 case DW_AT_picture_string
:
9332 return "DW_AT_picture_string";
9334 return "DW_AT_mutable";
9335 case DW_AT_threads_scaled
:
9336 return "DW_AT_threads_scaled";
9337 case DW_AT_explicit
:
9338 return "DW_AT_explicit";
9339 case DW_AT_object_pointer
:
9340 return "DW_AT_object_pointer";
9341 case DW_AT_endianity
:
9342 return "DW_AT_endianity";
9343 case DW_AT_elemental
:
9344 return "DW_AT_elemental";
9346 return "DW_AT_pure";
9347 case DW_AT_recursive
:
9348 return "DW_AT_recursive";
9349 /* DWARF 4 values. */
9350 case DW_AT_signature
:
9351 return "DW_AT_signature";
9352 /* SGI/MIPS extensions. */
9353 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9354 case DW_AT_MIPS_fde
:
9355 return "DW_AT_MIPS_fde";
9357 case DW_AT_MIPS_loop_begin
:
9358 return "DW_AT_MIPS_loop_begin";
9359 case DW_AT_MIPS_tail_loop_begin
:
9360 return "DW_AT_MIPS_tail_loop_begin";
9361 case DW_AT_MIPS_epilog_begin
:
9362 return "DW_AT_MIPS_epilog_begin";
9363 case DW_AT_MIPS_loop_unroll_factor
:
9364 return "DW_AT_MIPS_loop_unroll_factor";
9365 case DW_AT_MIPS_software_pipeline_depth
:
9366 return "DW_AT_MIPS_software_pipeline_depth";
9367 case DW_AT_MIPS_linkage_name
:
9368 return "DW_AT_MIPS_linkage_name";
9369 case DW_AT_MIPS_stride
:
9370 return "DW_AT_MIPS_stride";
9371 case DW_AT_MIPS_abstract_name
:
9372 return "DW_AT_MIPS_abstract_name";
9373 case DW_AT_MIPS_clone_origin
:
9374 return "DW_AT_MIPS_clone_origin";
9375 case DW_AT_MIPS_has_inlines
:
9376 return "DW_AT_MIPS_has_inlines";
9377 /* HP extensions. */
9378 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9379 case DW_AT_HP_block_index
:
9380 return "DW_AT_HP_block_index";
9382 case DW_AT_HP_unmodifiable
:
9383 return "DW_AT_HP_unmodifiable";
9384 case DW_AT_HP_actuals_stmt_list
:
9385 return "DW_AT_HP_actuals_stmt_list";
9386 case DW_AT_HP_proc_per_section
:
9387 return "DW_AT_HP_proc_per_section";
9388 case DW_AT_HP_raw_data_ptr
:
9389 return "DW_AT_HP_raw_data_ptr";
9390 case DW_AT_HP_pass_by_reference
:
9391 return "DW_AT_HP_pass_by_reference";
9392 case DW_AT_HP_opt_level
:
9393 return "DW_AT_HP_opt_level";
9394 case DW_AT_HP_prof_version_id
:
9395 return "DW_AT_HP_prof_version_id";
9396 case DW_AT_HP_opt_flags
:
9397 return "DW_AT_HP_opt_flags";
9398 case DW_AT_HP_cold_region_low_pc
:
9399 return "DW_AT_HP_cold_region_low_pc";
9400 case DW_AT_HP_cold_region_high_pc
:
9401 return "DW_AT_HP_cold_region_high_pc";
9402 case DW_AT_HP_all_variables_modifiable
:
9403 return "DW_AT_HP_all_variables_modifiable";
9404 case DW_AT_HP_linkage_name
:
9405 return "DW_AT_HP_linkage_name";
9406 case DW_AT_HP_prof_flags
:
9407 return "DW_AT_HP_prof_flags";
9408 /* GNU extensions. */
9409 case DW_AT_sf_names
:
9410 return "DW_AT_sf_names";
9411 case DW_AT_src_info
:
9412 return "DW_AT_src_info";
9413 case DW_AT_mac_info
:
9414 return "DW_AT_mac_info";
9415 case DW_AT_src_coords
:
9416 return "DW_AT_src_coords";
9417 case DW_AT_body_begin
:
9418 return "DW_AT_body_begin";
9419 case DW_AT_body_end
:
9420 return "DW_AT_body_end";
9421 case DW_AT_GNU_vector
:
9422 return "DW_AT_GNU_vector";
9423 /* VMS extensions. */
9424 case DW_AT_VMS_rtnbeg_pd_address
:
9425 return "DW_AT_VMS_rtnbeg_pd_address";
9426 /* UPC extension. */
9427 case DW_AT_upc_threads_scaled
:
9428 return "DW_AT_upc_threads_scaled";
9429 /* PGI (STMicroelectronics) extensions. */
9430 case DW_AT_PGI_lbase
:
9431 return "DW_AT_PGI_lbase";
9432 case DW_AT_PGI_soffset
:
9433 return "DW_AT_PGI_soffset";
9434 case DW_AT_PGI_lstride
:
9435 return "DW_AT_PGI_lstride";
9437 return "DW_AT_<unknown>";
9441 /* Convert a DWARF value form code into its string name. */
9444 dwarf_form_name (unsigned form
)
9449 return "DW_FORM_addr";
9450 case DW_FORM_block2
:
9451 return "DW_FORM_block2";
9452 case DW_FORM_block4
:
9453 return "DW_FORM_block4";
9455 return "DW_FORM_data2";
9457 return "DW_FORM_data4";
9459 return "DW_FORM_data8";
9460 case DW_FORM_string
:
9461 return "DW_FORM_string";
9463 return "DW_FORM_block";
9464 case DW_FORM_block1
:
9465 return "DW_FORM_block1";
9467 return "DW_FORM_data1";
9469 return "DW_FORM_flag";
9471 return "DW_FORM_sdata";
9473 return "DW_FORM_strp";
9475 return "DW_FORM_udata";
9476 case DW_FORM_ref_addr
:
9477 return "DW_FORM_ref_addr";
9479 return "DW_FORM_ref1";
9481 return "DW_FORM_ref2";
9483 return "DW_FORM_ref4";
9485 return "DW_FORM_ref8";
9486 case DW_FORM_ref_udata
:
9487 return "DW_FORM_ref_udata";
9488 case DW_FORM_indirect
:
9489 return "DW_FORM_indirect";
9490 case DW_FORM_sec_offset
:
9491 return "DW_FORM_sec_offset";
9492 case DW_FORM_exprloc
:
9493 return "DW_FORM_exprloc";
9494 case DW_FORM_flag_present
:
9495 return "DW_FORM_flag_present";
9497 return "DW_FORM_sig8";
9499 return "DW_FORM_<unknown>";
9503 /* Convert a DWARF stack opcode into its string name. */
9506 dwarf_stack_op_name (unsigned op
)
9511 return "DW_OP_addr";
9513 return "DW_OP_deref";
9515 return "DW_OP_const1u";
9517 return "DW_OP_const1s";
9519 return "DW_OP_const2u";
9521 return "DW_OP_const2s";
9523 return "DW_OP_const4u";
9525 return "DW_OP_const4s";
9527 return "DW_OP_const8u";
9529 return "DW_OP_const8s";
9531 return "DW_OP_constu";
9533 return "DW_OP_consts";
9537 return "DW_OP_drop";
9539 return "DW_OP_over";
9541 return "DW_OP_pick";
9543 return "DW_OP_swap";
9547 return "DW_OP_xderef";
9555 return "DW_OP_minus";
9567 return "DW_OP_plus";
9568 case DW_OP_plus_uconst
:
9569 return "DW_OP_plus_uconst";
9575 return "DW_OP_shra";
9593 return "DW_OP_skip";
9595 return "DW_OP_lit0";
9597 return "DW_OP_lit1";
9599 return "DW_OP_lit2";
9601 return "DW_OP_lit3";
9603 return "DW_OP_lit4";
9605 return "DW_OP_lit5";
9607 return "DW_OP_lit6";
9609 return "DW_OP_lit7";
9611 return "DW_OP_lit8";
9613 return "DW_OP_lit9";
9615 return "DW_OP_lit10";
9617 return "DW_OP_lit11";
9619 return "DW_OP_lit12";
9621 return "DW_OP_lit13";
9623 return "DW_OP_lit14";
9625 return "DW_OP_lit15";
9627 return "DW_OP_lit16";
9629 return "DW_OP_lit17";
9631 return "DW_OP_lit18";
9633 return "DW_OP_lit19";
9635 return "DW_OP_lit20";
9637 return "DW_OP_lit21";
9639 return "DW_OP_lit22";
9641 return "DW_OP_lit23";
9643 return "DW_OP_lit24";
9645 return "DW_OP_lit25";
9647 return "DW_OP_lit26";
9649 return "DW_OP_lit27";
9651 return "DW_OP_lit28";
9653 return "DW_OP_lit29";
9655 return "DW_OP_lit30";
9657 return "DW_OP_lit31";
9659 return "DW_OP_reg0";
9661 return "DW_OP_reg1";
9663 return "DW_OP_reg2";
9665 return "DW_OP_reg3";
9667 return "DW_OP_reg4";
9669 return "DW_OP_reg5";
9671 return "DW_OP_reg6";
9673 return "DW_OP_reg7";
9675 return "DW_OP_reg8";
9677 return "DW_OP_reg9";
9679 return "DW_OP_reg10";
9681 return "DW_OP_reg11";
9683 return "DW_OP_reg12";
9685 return "DW_OP_reg13";
9687 return "DW_OP_reg14";
9689 return "DW_OP_reg15";
9691 return "DW_OP_reg16";
9693 return "DW_OP_reg17";
9695 return "DW_OP_reg18";
9697 return "DW_OP_reg19";
9699 return "DW_OP_reg20";
9701 return "DW_OP_reg21";
9703 return "DW_OP_reg22";
9705 return "DW_OP_reg23";
9707 return "DW_OP_reg24";
9709 return "DW_OP_reg25";
9711 return "DW_OP_reg26";
9713 return "DW_OP_reg27";
9715 return "DW_OP_reg28";
9717 return "DW_OP_reg29";
9719 return "DW_OP_reg30";
9721 return "DW_OP_reg31";
9723 return "DW_OP_breg0";
9725 return "DW_OP_breg1";
9727 return "DW_OP_breg2";
9729 return "DW_OP_breg3";
9731 return "DW_OP_breg4";
9733 return "DW_OP_breg5";
9735 return "DW_OP_breg6";
9737 return "DW_OP_breg7";
9739 return "DW_OP_breg8";
9741 return "DW_OP_breg9";
9743 return "DW_OP_breg10";
9745 return "DW_OP_breg11";
9747 return "DW_OP_breg12";
9749 return "DW_OP_breg13";
9751 return "DW_OP_breg14";
9753 return "DW_OP_breg15";
9755 return "DW_OP_breg16";
9757 return "DW_OP_breg17";
9759 return "DW_OP_breg18";
9761 return "DW_OP_breg19";
9763 return "DW_OP_breg20";
9765 return "DW_OP_breg21";
9767 return "DW_OP_breg22";
9769 return "DW_OP_breg23";
9771 return "DW_OP_breg24";
9773 return "DW_OP_breg25";
9775 return "DW_OP_breg26";
9777 return "DW_OP_breg27";
9779 return "DW_OP_breg28";
9781 return "DW_OP_breg29";
9783 return "DW_OP_breg30";
9785 return "DW_OP_breg31";
9787 return "DW_OP_regx";
9789 return "DW_OP_fbreg";
9791 return "DW_OP_bregx";
9793 return "DW_OP_piece";
9794 case DW_OP_deref_size
:
9795 return "DW_OP_deref_size";
9796 case DW_OP_xderef_size
:
9797 return "DW_OP_xderef_size";
9800 /* DWARF 3 extensions. */
9801 case DW_OP_push_object_address
:
9802 return "DW_OP_push_object_address";
9804 return "DW_OP_call2";
9806 return "DW_OP_call4";
9807 case DW_OP_call_ref
:
9808 return "DW_OP_call_ref";
9809 /* GNU extensions. */
9810 case DW_OP_form_tls_address
:
9811 return "DW_OP_form_tls_address";
9812 case DW_OP_call_frame_cfa
:
9813 return "DW_OP_call_frame_cfa";
9814 case DW_OP_bit_piece
:
9815 return "DW_OP_bit_piece";
9816 case DW_OP_GNU_push_tls_address
:
9817 return "DW_OP_GNU_push_tls_address";
9818 case DW_OP_GNU_uninit
:
9819 return "DW_OP_GNU_uninit";
9820 /* HP extensions. */
9821 case DW_OP_HP_is_value
:
9822 return "DW_OP_HP_is_value";
9823 case DW_OP_HP_fltconst4
:
9824 return "DW_OP_HP_fltconst4";
9825 case DW_OP_HP_fltconst8
:
9826 return "DW_OP_HP_fltconst8";
9827 case DW_OP_HP_mod_range
:
9828 return "DW_OP_HP_mod_range";
9829 case DW_OP_HP_unmod_range
:
9830 return "DW_OP_HP_unmod_range";
9832 return "DW_OP_HP_tls";
9834 return "OP_<unknown>";
9839 dwarf_bool_name (unsigned mybool
)
9847 /* Convert a DWARF type code into its string name. */
9850 dwarf_type_encoding_name (unsigned enc
)
9855 return "DW_ATE_void";
9856 case DW_ATE_address
:
9857 return "DW_ATE_address";
9858 case DW_ATE_boolean
:
9859 return "DW_ATE_boolean";
9860 case DW_ATE_complex_float
:
9861 return "DW_ATE_complex_float";
9863 return "DW_ATE_float";
9865 return "DW_ATE_signed";
9866 case DW_ATE_signed_char
:
9867 return "DW_ATE_signed_char";
9868 case DW_ATE_unsigned
:
9869 return "DW_ATE_unsigned";
9870 case DW_ATE_unsigned_char
:
9871 return "DW_ATE_unsigned_char";
9873 case DW_ATE_imaginary_float
:
9874 return "DW_ATE_imaginary_float";
9875 case DW_ATE_packed_decimal
:
9876 return "DW_ATE_packed_decimal";
9877 case DW_ATE_numeric_string
:
9878 return "DW_ATE_numeric_string";
9880 return "DW_ATE_edited";
9881 case DW_ATE_signed_fixed
:
9882 return "DW_ATE_signed_fixed";
9883 case DW_ATE_unsigned_fixed
:
9884 return "DW_ATE_unsigned_fixed";
9885 case DW_ATE_decimal_float
:
9886 return "DW_ATE_decimal_float";
9887 /* HP extensions. */
9888 case DW_ATE_HP_float80
:
9889 return "DW_ATE_HP_float80";
9890 case DW_ATE_HP_complex_float80
:
9891 return "DW_ATE_HP_complex_float80";
9892 case DW_ATE_HP_float128
:
9893 return "DW_ATE_HP_float128";
9894 case DW_ATE_HP_complex_float128
:
9895 return "DW_ATE_HP_complex_float128";
9896 case DW_ATE_HP_floathpintel
:
9897 return "DW_ATE_HP_floathpintel";
9898 case DW_ATE_HP_imaginary_float80
:
9899 return "DW_ATE_HP_imaginary_float80";
9900 case DW_ATE_HP_imaginary_float128
:
9901 return "DW_ATE_HP_imaginary_float128";
9903 return "DW_ATE_<unknown>";
9907 /* Convert a DWARF call frame info operation to its string name. */
9911 dwarf_cfi_name (unsigned cfi_opc
)
9915 case DW_CFA_advance_loc
:
9916 return "DW_CFA_advance_loc";
9918 return "DW_CFA_offset";
9919 case DW_CFA_restore
:
9920 return "DW_CFA_restore";
9922 return "DW_CFA_nop";
9923 case DW_CFA_set_loc
:
9924 return "DW_CFA_set_loc";
9925 case DW_CFA_advance_loc1
:
9926 return "DW_CFA_advance_loc1";
9927 case DW_CFA_advance_loc2
:
9928 return "DW_CFA_advance_loc2";
9929 case DW_CFA_advance_loc4
:
9930 return "DW_CFA_advance_loc4";
9931 case DW_CFA_offset_extended
:
9932 return "DW_CFA_offset_extended";
9933 case DW_CFA_restore_extended
:
9934 return "DW_CFA_restore_extended";
9935 case DW_CFA_undefined
:
9936 return "DW_CFA_undefined";
9937 case DW_CFA_same_value
:
9938 return "DW_CFA_same_value";
9939 case DW_CFA_register
:
9940 return "DW_CFA_register";
9941 case DW_CFA_remember_state
:
9942 return "DW_CFA_remember_state";
9943 case DW_CFA_restore_state
:
9944 return "DW_CFA_restore_state";
9945 case DW_CFA_def_cfa
:
9946 return "DW_CFA_def_cfa";
9947 case DW_CFA_def_cfa_register
:
9948 return "DW_CFA_def_cfa_register";
9949 case DW_CFA_def_cfa_offset
:
9950 return "DW_CFA_def_cfa_offset";
9952 case DW_CFA_def_cfa_expression
:
9953 return "DW_CFA_def_cfa_expression";
9954 case DW_CFA_expression
:
9955 return "DW_CFA_expression";
9956 case DW_CFA_offset_extended_sf
:
9957 return "DW_CFA_offset_extended_sf";
9958 case DW_CFA_def_cfa_sf
:
9959 return "DW_CFA_def_cfa_sf";
9960 case DW_CFA_def_cfa_offset_sf
:
9961 return "DW_CFA_def_cfa_offset_sf";
9962 case DW_CFA_val_offset
:
9963 return "DW_CFA_val_offset";
9964 case DW_CFA_val_offset_sf
:
9965 return "DW_CFA_val_offset_sf";
9966 case DW_CFA_val_expression
:
9967 return "DW_CFA_val_expression";
9968 /* SGI/MIPS specific. */
9969 case DW_CFA_MIPS_advance_loc8
:
9970 return "DW_CFA_MIPS_advance_loc8";
9971 /* GNU extensions. */
9972 case DW_CFA_GNU_window_save
:
9973 return "DW_CFA_GNU_window_save";
9974 case DW_CFA_GNU_args_size
:
9975 return "DW_CFA_GNU_args_size";
9976 case DW_CFA_GNU_negative_offset_extended
:
9977 return "DW_CFA_GNU_negative_offset_extended";
9979 return "DW_CFA_<unknown>";
9985 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
9989 print_spaces (indent
, f
);
9990 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
9991 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
9993 if (die
->parent
!= NULL
)
9995 print_spaces (indent
, f
);
9996 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
9997 die
->parent
->offset
);
10000 print_spaces (indent
, f
);
10001 fprintf_unfiltered (f
, " has children: %s\n",
10002 dwarf_bool_name (die
->child
!= NULL
));
10004 print_spaces (indent
, f
);
10005 fprintf_unfiltered (f
, " attributes:\n");
10007 for (i
= 0; i
< die
->num_attrs
; ++i
)
10009 print_spaces (indent
, f
);
10010 fprintf_unfiltered (f
, " %s (%s) ",
10011 dwarf_attr_name (die
->attrs
[i
].name
),
10012 dwarf_form_name (die
->attrs
[i
].form
));
10014 switch (die
->attrs
[i
].form
)
10016 case DW_FORM_ref_addr
:
10018 fprintf_unfiltered (f
, "address: ");
10019 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10021 case DW_FORM_block2
:
10022 case DW_FORM_block4
:
10023 case DW_FORM_block
:
10024 case DW_FORM_block1
:
10025 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10030 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10031 (long) (DW_ADDR (&die
->attrs
[i
])));
10033 case DW_FORM_data1
:
10034 case DW_FORM_data2
:
10035 case DW_FORM_data4
:
10036 case DW_FORM_data8
:
10037 case DW_FORM_udata
:
10038 case DW_FORM_sdata
:
10039 fprintf_unfiltered (f
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
10042 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10043 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10044 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10046 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10048 case DW_FORM_string
:
10050 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10051 DW_STRING (&die
->attrs
[i
])
10052 ? DW_STRING (&die
->attrs
[i
]) : "",
10053 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10056 if (DW_UNSND (&die
->attrs
[i
]))
10057 fprintf_unfiltered (f
, "flag: TRUE");
10059 fprintf_unfiltered (f
, "flag: FALSE");
10061 case DW_FORM_indirect
:
10062 /* the reader will have reduced the indirect form to
10063 the "base form" so this form should not occur */
10064 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10067 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10068 die
->attrs
[i
].form
);
10071 fprintf_unfiltered (f
, "\n");
10076 dump_die_for_error (struct die_info
*die
)
10078 dump_die_shallow (gdb_stderr
, 0, die
);
10082 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10084 int indent
= level
* 4;
10086 gdb_assert (die
!= NULL
);
10088 if (level
>= max_level
)
10091 dump_die_shallow (f
, indent
, die
);
10093 if (die
->child
!= NULL
)
10095 print_spaces (indent
, f
);
10096 fprintf_unfiltered (f
, " Children:");
10097 if (level
+ 1 < max_level
)
10099 fprintf_unfiltered (f
, "\n");
10100 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10104 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10108 if (die
->sibling
!= NULL
&& level
> 0)
10110 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10114 /* This is called from the pdie macro in gdbinit.in.
10115 It's not static so gcc will keep a copy callable from gdb. */
10118 dump_die (struct die_info
*die
, int max_level
)
10120 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10124 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10128 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10134 is_ref_attr (struct attribute
*attr
)
10136 switch (attr
->form
)
10138 case DW_FORM_ref_addr
:
10143 case DW_FORM_ref_udata
:
10150 static unsigned int
10151 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10153 if (is_ref_attr (attr
))
10154 return DW_ADDR (attr
);
10156 complaint (&symfile_complaints
,
10157 _("unsupported die ref attribute form: '%s'"),
10158 dwarf_form_name (attr
->form
));
10162 /* Return the constant value held by the given attribute. Return -1
10163 if the value held by the attribute is not constant. */
10166 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10168 if (attr
->form
== DW_FORM_sdata
)
10169 return DW_SND (attr
);
10170 else if (attr
->form
== DW_FORM_udata
10171 || attr
->form
== DW_FORM_data1
10172 || attr
->form
== DW_FORM_data2
10173 || attr
->form
== DW_FORM_data4
10174 || attr
->form
== DW_FORM_data8
)
10175 return DW_UNSND (attr
);
10178 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10179 dwarf_form_name (attr
->form
));
10180 return default_value
;
10184 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10185 unit and add it to our queue.
10186 The result is non-zero if PER_CU was queued, otherwise the result is zero
10187 meaning either PER_CU is already queued or it is already loaded. */
10190 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10191 struct dwarf2_per_cu_data
*per_cu
)
10193 /* Mark the dependence relation so that we don't flush PER_CU
10195 dwarf2_add_dependence (this_cu
, per_cu
);
10197 /* If it's already on the queue, we have nothing to do. */
10198 if (per_cu
->queued
)
10201 /* If the compilation unit is already loaded, just mark it as
10203 if (per_cu
->cu
!= NULL
)
10205 per_cu
->cu
->last_used
= 0;
10209 /* Add it to the queue. */
10210 queue_comp_unit (per_cu
, this_cu
->objfile
);
10215 /* Follow reference or signature attribute ATTR of SRC_DIE.
10216 On entry *REF_CU is the CU of SRC_DIE.
10217 On exit *REF_CU is the CU of the result. */
10219 static struct die_info
*
10220 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10221 struct dwarf2_cu
**ref_cu
)
10223 struct die_info
*die
;
10225 if (is_ref_attr (attr
))
10226 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10227 else if (attr
->form
== DW_FORM_sig8
)
10228 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10231 dump_die_for_error (src_die
);
10232 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10233 (*ref_cu
)->objfile
->name
);
10239 /* Follow reference attribute ATTR of SRC_DIE.
10240 On entry *REF_CU is the CU of SRC_DIE.
10241 On exit *REF_CU is the CU of the result. */
10243 static struct die_info
*
10244 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10245 struct dwarf2_cu
**ref_cu
)
10247 struct die_info
*die
;
10248 unsigned int offset
;
10249 struct die_info temp_die
;
10250 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10252 gdb_assert (cu
->per_cu
!= NULL
);
10254 offset
= dwarf2_get_ref_die_offset (attr
);
10256 if (cu
->per_cu
->from_debug_types
)
10258 /* .debug_types CUs cannot reference anything outside their CU.
10259 If they need to, they have to reference a signatured type via
10261 if (! offset_in_cu_p (&cu
->header
, offset
))
10265 else if (! offset_in_cu_p (&cu
->header
, offset
))
10267 struct dwarf2_per_cu_data
*per_cu
;
10268 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10270 /* If necessary, add it to the queue and load its DIEs. */
10271 if (maybe_queue_comp_unit (cu
, per_cu
))
10272 load_full_comp_unit (per_cu
, cu
->objfile
);
10274 target_cu
= per_cu
->cu
;
10279 *ref_cu
= target_cu
;
10280 temp_die
.offset
= offset
;
10281 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10287 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10288 "at 0x%x [in module %s]"),
10289 offset
, src_die
->offset
, cu
->objfile
->name
);
10292 /* Follow the signature attribute ATTR in SRC_DIE.
10293 On entry *REF_CU is the CU of SRC_DIE.
10294 On exit *REF_CU is the CU of the result. */
10296 static struct die_info
*
10297 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10298 struct dwarf2_cu
**ref_cu
)
10300 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10301 struct die_info temp_die
;
10302 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10303 struct dwarf2_cu
*sig_cu
;
10304 struct die_info
*die
;
10306 /* sig_type will be NULL if the signatured type is missing from
10308 if (sig_type
== NULL
)
10309 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10310 "at 0x%x [in module %s]"),
10311 src_die
->offset
, objfile
->name
);
10313 /* If necessary, add it to the queue and load its DIEs. */
10315 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10316 read_signatured_type (objfile
, sig_type
);
10318 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10320 sig_cu
= sig_type
->per_cu
.cu
;
10321 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10322 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10329 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10330 "at 0x%x [in module %s]"),
10331 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10334 /* Given an offset of a signatured type, return its signatured_type. */
10336 static struct signatured_type
*
10337 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10339 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10340 unsigned int length
, initial_length_size
;
10341 unsigned int sig_offset
;
10342 struct signatured_type find_entry
, *type_sig
;
10344 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10345 sig_offset
= (initial_length_size
10347 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10348 + 1 /*address_size*/);
10349 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10350 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10352 /* This is only used to lookup previously recorded types.
10353 If we didn't find it, it's our bug. */
10354 gdb_assert (type_sig
!= NULL
);
10355 gdb_assert (offset
== type_sig
->offset
);
10360 /* Read in signatured type at OFFSET and build its CU and die(s). */
10363 read_signatured_type_at_offset (struct objfile
*objfile
,
10364 unsigned int offset
)
10366 struct signatured_type
*type_sig
;
10368 /* We have the section offset, but we need the signature to do the
10369 hash table lookup. */
10370 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10372 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10374 read_signatured_type (objfile
, type_sig
);
10376 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10379 /* Read in a signatured type and build its CU and DIEs. */
10382 read_signatured_type (struct objfile
*objfile
,
10383 struct signatured_type
*type_sig
)
10385 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10386 struct die_reader_specs reader_specs
;
10387 struct dwarf2_cu
*cu
;
10388 ULONGEST signature
;
10389 struct cleanup
*back_to
, *free_cu_cleanup
;
10390 struct attribute
*attr
;
10392 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10394 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10395 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10396 obstack_init (&cu
->comp_unit_obstack
);
10397 cu
->objfile
= objfile
;
10398 type_sig
->per_cu
.cu
= cu
;
10399 cu
->per_cu
= &type_sig
->per_cu
;
10401 /* If an error occurs while loading, release our storage. */
10402 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10404 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10405 types_ptr
, objfile
->obfd
);
10406 gdb_assert (signature
== type_sig
->signature
);
10409 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10413 &cu
->comp_unit_obstack
,
10414 hashtab_obstack_allocate
,
10415 dummy_obstack_deallocate
);
10417 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10418 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10420 init_cu_die_reader (&reader_specs
, cu
);
10422 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10425 /* We try not to read any attributes in this function, because not
10426 all objfiles needed for references have been loaded yet, and symbol
10427 table processing isn't initialized. But we have to set the CU language,
10428 or we won't be able to build types correctly. */
10429 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10431 set_cu_language (DW_UNSND (attr
), cu
);
10433 set_cu_language (language_minimal
, cu
);
10435 do_cleanups (back_to
);
10437 /* We've successfully allocated this compilation unit. Let our caller
10438 clean it up when finished with it. */
10439 discard_cleanups (free_cu_cleanup
);
10441 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10442 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10445 /* Decode simple location descriptions.
10446 Given a pointer to a dwarf block that defines a location, compute
10447 the location and return the value.
10449 NOTE drow/2003-11-18: This function is called in two situations
10450 now: for the address of static or global variables (partial symbols
10451 only) and for offsets into structures which are expected to be
10452 (more or less) constant. The partial symbol case should go away,
10453 and only the constant case should remain. That will let this
10454 function complain more accurately. A few special modes are allowed
10455 without complaint for global variables (for instance, global
10456 register values and thread-local values).
10458 A location description containing no operations indicates that the
10459 object is optimized out. The return value is 0 for that case.
10460 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10461 callers will only want a very basic result and this can become a
10464 Note that stack[0] is unused except as a default error return.
10465 Note that stack overflow is not yet handled. */
10468 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10470 struct objfile
*objfile
= cu
->objfile
;
10471 struct comp_unit_head
*cu_header
= &cu
->header
;
10473 int size
= blk
->size
;
10474 gdb_byte
*data
= blk
->data
;
10475 CORE_ADDR stack
[64];
10477 unsigned int bytes_read
, unsnd
;
10521 stack
[++stacki
] = op
- DW_OP_lit0
;
10556 stack
[++stacki
] = op
- DW_OP_reg0
;
10558 dwarf2_complex_location_expr_complaint ();
10562 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10564 stack
[++stacki
] = unsnd
;
10566 dwarf2_complex_location_expr_complaint ();
10570 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10575 case DW_OP_const1u
:
10576 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10580 case DW_OP_const1s
:
10581 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10585 case DW_OP_const2u
:
10586 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10590 case DW_OP_const2s
:
10591 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10595 case DW_OP_const4u
:
10596 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10600 case DW_OP_const4s
:
10601 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10606 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10612 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10617 stack
[stacki
+ 1] = stack
[stacki
];
10622 stack
[stacki
- 1] += stack
[stacki
];
10626 case DW_OP_plus_uconst
:
10627 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10632 stack
[stacki
- 1] -= stack
[stacki
];
10637 /* If we're not the last op, then we definitely can't encode
10638 this using GDB's address_class enum. This is valid for partial
10639 global symbols, although the variable's address will be bogus
10642 dwarf2_complex_location_expr_complaint ();
10645 case DW_OP_GNU_push_tls_address
:
10646 /* The top of the stack has the offset from the beginning
10647 of the thread control block at which the variable is located. */
10648 /* Nothing should follow this operator, so the top of stack would
10650 /* This is valid for partial global symbols, but the variable's
10651 address will be bogus in the psymtab. */
10653 dwarf2_complex_location_expr_complaint ();
10656 case DW_OP_GNU_uninit
:
10660 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
10661 dwarf_stack_op_name (op
));
10662 return (stack
[stacki
]);
10665 return (stack
[stacki
]);
10668 /* memory allocation interface */
10670 static struct dwarf_block
*
10671 dwarf_alloc_block (struct dwarf2_cu
*cu
)
10673 struct dwarf_block
*blk
;
10675 blk
= (struct dwarf_block
*)
10676 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
10680 static struct abbrev_info
*
10681 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
10683 struct abbrev_info
*abbrev
;
10685 abbrev
= (struct abbrev_info
*)
10686 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
10687 memset (abbrev
, 0, sizeof (struct abbrev_info
));
10691 static struct die_info
*
10692 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
10694 struct die_info
*die
;
10695 size_t size
= sizeof (struct die_info
);
10698 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
10700 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
10701 memset (die
, 0, sizeof (struct die_info
));
10706 /* Macro support. */
10709 /* Return the full name of file number I in *LH's file name table.
10710 Use COMP_DIR as the name of the current directory of the
10711 compilation. The result is allocated using xmalloc; the caller is
10712 responsible for freeing it. */
10714 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
10716 /* Is the file number a valid index into the line header's file name
10717 table? Remember that file numbers start with one, not zero. */
10718 if (1 <= file
&& file
<= lh
->num_file_names
)
10720 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10722 if (IS_ABSOLUTE_PATH (fe
->name
))
10723 return xstrdup (fe
->name
);
10731 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10737 dir_len
= strlen (dir
);
10738 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
10739 strcpy (full_name
, dir
);
10740 full_name
[dir_len
] = '/';
10741 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
10745 return xstrdup (fe
->name
);
10750 /* The compiler produced a bogus file number. We can at least
10751 record the macro definitions made in the file, even if we
10752 won't be able to find the file by name. */
10753 char fake_name
[80];
10754 sprintf (fake_name
, "<bad macro file number %d>", file
);
10756 complaint (&symfile_complaints
,
10757 _("bad file number in macro information (%d)"),
10760 return xstrdup (fake_name
);
10765 static struct macro_source_file
*
10766 macro_start_file (int file
, int line
,
10767 struct macro_source_file
*current_file
,
10768 const char *comp_dir
,
10769 struct line_header
*lh
, struct objfile
*objfile
)
10771 /* The full name of this source file. */
10772 char *full_name
= file_full_name (file
, lh
, comp_dir
);
10774 /* We don't create a macro table for this compilation unit
10775 at all until we actually get a filename. */
10776 if (! pending_macros
)
10777 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
10778 objfile
->macro_cache
);
10780 if (! current_file
)
10781 /* If we have no current file, then this must be the start_file
10782 directive for the compilation unit's main source file. */
10783 current_file
= macro_set_main (pending_macros
, full_name
);
10785 current_file
= macro_include (current_file
, line
, full_name
);
10789 return current_file
;
10793 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10794 followed by a null byte. */
10796 copy_string (const char *buf
, int len
)
10798 char *s
= xmalloc (len
+ 1);
10799 memcpy (s
, buf
, len
);
10806 static const char *
10807 consume_improper_spaces (const char *p
, const char *body
)
10811 complaint (&symfile_complaints
,
10812 _("macro definition contains spaces in formal argument list:\n`%s'"),
10824 parse_macro_definition (struct macro_source_file
*file
, int line
,
10829 /* The body string takes one of two forms. For object-like macro
10830 definitions, it should be:
10832 <macro name> " " <definition>
10834 For function-like macro definitions, it should be:
10836 <macro name> "() " <definition>
10838 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10840 Spaces may appear only where explicitly indicated, and in the
10843 The Dwarf 2 spec says that an object-like macro's name is always
10844 followed by a space, but versions of GCC around March 2002 omit
10845 the space when the macro's definition is the empty string.
10847 The Dwarf 2 spec says that there should be no spaces between the
10848 formal arguments in a function-like macro's formal argument list,
10849 but versions of GCC around March 2002 include spaces after the
10853 /* Find the extent of the macro name. The macro name is terminated
10854 by either a space or null character (for an object-like macro) or
10855 an opening paren (for a function-like macro). */
10856 for (p
= body
; *p
; p
++)
10857 if (*p
== ' ' || *p
== '(')
10860 if (*p
== ' ' || *p
== '\0')
10862 /* It's an object-like macro. */
10863 int name_len
= p
- body
;
10864 char *name
= copy_string (body
, name_len
);
10865 const char *replacement
;
10868 replacement
= body
+ name_len
+ 1;
10871 dwarf2_macro_malformed_definition_complaint (body
);
10872 replacement
= body
+ name_len
;
10875 macro_define_object (file
, line
, name
, replacement
);
10879 else if (*p
== '(')
10881 /* It's a function-like macro. */
10882 char *name
= copy_string (body
, p
- body
);
10885 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
10889 p
= consume_improper_spaces (p
, body
);
10891 /* Parse the formal argument list. */
10892 while (*p
&& *p
!= ')')
10894 /* Find the extent of the current argument name. */
10895 const char *arg_start
= p
;
10897 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
10900 if (! *p
|| p
== arg_start
)
10901 dwarf2_macro_malformed_definition_complaint (body
);
10904 /* Make sure argv has room for the new argument. */
10905 if (argc
>= argv_size
)
10908 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
10911 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
10914 p
= consume_improper_spaces (p
, body
);
10916 /* Consume the comma, if present. */
10921 p
= consume_improper_spaces (p
, body
);
10930 /* Perfectly formed definition, no complaints. */
10931 macro_define_function (file
, line
, name
,
10932 argc
, (const char **) argv
,
10934 else if (*p
== '\0')
10936 /* Complain, but do define it. */
10937 dwarf2_macro_malformed_definition_complaint (body
);
10938 macro_define_function (file
, line
, name
,
10939 argc
, (const char **) argv
,
10943 /* Just complain. */
10944 dwarf2_macro_malformed_definition_complaint (body
);
10947 /* Just complain. */
10948 dwarf2_macro_malformed_definition_complaint (body
);
10954 for (i
= 0; i
< argc
; i
++)
10960 dwarf2_macro_malformed_definition_complaint (body
);
10965 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
10966 char *comp_dir
, bfd
*abfd
,
10967 struct dwarf2_cu
*cu
)
10969 gdb_byte
*mac_ptr
, *mac_end
;
10970 struct macro_source_file
*current_file
= 0;
10971 enum dwarf_macinfo_record_type macinfo_type
;
10972 int at_commandline
;
10974 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
10976 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
10980 /* First pass: Find the name of the base filename.
10981 This filename is needed in order to process all macros whose definition
10982 (or undefinition) comes from the command line. These macros are defined
10983 before the first DW_MACINFO_start_file entry, and yet still need to be
10984 associated to the base file.
10986 To determine the base file name, we scan the macro definitions until we
10987 reach the first DW_MACINFO_start_file entry. We then initialize
10988 CURRENT_FILE accordingly so that any macro definition found before the
10989 first DW_MACINFO_start_file can still be associated to the base file. */
10991 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
10992 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
10993 + dwarf2_per_objfile
->macinfo
.size
;
10997 /* Do we at least have room for a macinfo type byte? */
10998 if (mac_ptr
>= mac_end
)
11000 /* Complaint is printed during the second pass as GDB will probably
11001 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11005 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11008 switch (macinfo_type
)
11010 /* A zero macinfo type indicates the end of the macro
11015 case DW_MACINFO_define
:
11016 case DW_MACINFO_undef
:
11017 /* Only skip the data by MAC_PTR. */
11019 unsigned int bytes_read
;
11021 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11022 mac_ptr
+= bytes_read
;
11023 read_string (abfd
, mac_ptr
, &bytes_read
);
11024 mac_ptr
+= bytes_read
;
11028 case DW_MACINFO_start_file
:
11030 unsigned int bytes_read
;
11033 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11034 mac_ptr
+= bytes_read
;
11035 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11036 mac_ptr
+= bytes_read
;
11038 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11043 case DW_MACINFO_end_file
:
11044 /* No data to skip by MAC_PTR. */
11047 case DW_MACINFO_vendor_ext
:
11048 /* Only skip the data by MAC_PTR. */
11050 unsigned int bytes_read
;
11052 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11053 mac_ptr
+= bytes_read
;
11054 read_string (abfd
, mac_ptr
, &bytes_read
);
11055 mac_ptr
+= bytes_read
;
11062 } while (macinfo_type
!= 0 && current_file
== NULL
);
11064 /* Second pass: Process all entries.
11066 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11067 command-line macro definitions/undefinitions. This flag is unset when we
11068 reach the first DW_MACINFO_start_file entry. */
11070 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11072 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11073 GDB is still reading the definitions from command line. First
11074 DW_MACINFO_start_file will need to be ignored as it was already executed
11075 to create CURRENT_FILE for the main source holding also the command line
11076 definitions. On first met DW_MACINFO_start_file this flag is reset to
11077 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11079 at_commandline
= 1;
11083 /* Do we at least have room for a macinfo type byte? */
11084 if (mac_ptr
>= mac_end
)
11086 dwarf2_macros_too_long_complaint ();
11090 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11093 switch (macinfo_type
)
11095 /* A zero macinfo type indicates the end of the macro
11100 case DW_MACINFO_define
:
11101 case DW_MACINFO_undef
:
11103 unsigned int bytes_read
;
11107 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11108 mac_ptr
+= bytes_read
;
11109 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11110 mac_ptr
+= bytes_read
;
11112 if (! current_file
)
11114 /* DWARF violation as no main source is present. */
11115 complaint (&symfile_complaints
,
11116 _("debug info with no main source gives macro %s "
11118 macinfo_type
== DW_MACINFO_define
?
11120 macinfo_type
== DW_MACINFO_undef
?
11121 _("undefinition") :
11122 _("something-or-other"), line
, body
);
11125 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11126 complaint (&symfile_complaints
,
11127 _("debug info gives %s macro %s with %s line %d: %s"),
11128 at_commandline
? _("command-line") : _("in-file"),
11129 macinfo_type
== DW_MACINFO_define
?
11131 macinfo_type
== DW_MACINFO_undef
?
11132 _("undefinition") :
11133 _("something-or-other"),
11134 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11136 if (macinfo_type
== DW_MACINFO_define
)
11137 parse_macro_definition (current_file
, line
, body
);
11138 else if (macinfo_type
== DW_MACINFO_undef
)
11139 macro_undef (current_file
, line
, body
);
11143 case DW_MACINFO_start_file
:
11145 unsigned int bytes_read
;
11148 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11149 mac_ptr
+= bytes_read
;
11150 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11151 mac_ptr
+= bytes_read
;
11153 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11154 complaint (&symfile_complaints
,
11155 _("debug info gives source %d included "
11156 "from %s at %s line %d"),
11157 file
, at_commandline
? _("command-line") : _("file"),
11158 line
== 0 ? _("zero") : _("non-zero"), line
);
11160 if (at_commandline
)
11162 /* This DW_MACINFO_start_file was executed in the pass one. */
11163 at_commandline
= 0;
11166 current_file
= macro_start_file (file
, line
,
11167 current_file
, comp_dir
,
11172 case DW_MACINFO_end_file
:
11173 if (! current_file
)
11174 complaint (&symfile_complaints
,
11175 _("macro debug info has an unmatched `close_file' directive"));
11178 current_file
= current_file
->included_by
;
11179 if (! current_file
)
11181 enum dwarf_macinfo_record_type next_type
;
11183 /* GCC circa March 2002 doesn't produce the zero
11184 type byte marking the end of the compilation
11185 unit. Complain if it's not there, but exit no
11188 /* Do we at least have room for a macinfo type byte? */
11189 if (mac_ptr
>= mac_end
)
11191 dwarf2_macros_too_long_complaint ();
11195 /* We don't increment mac_ptr here, so this is just
11197 next_type
= read_1_byte (abfd
, mac_ptr
);
11198 if (next_type
!= 0)
11199 complaint (&symfile_complaints
,
11200 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11207 case DW_MACINFO_vendor_ext
:
11209 unsigned int bytes_read
;
11213 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11214 mac_ptr
+= bytes_read
;
11215 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11216 mac_ptr
+= bytes_read
;
11218 /* We don't recognize any vendor extensions. */
11222 } while (macinfo_type
!= 0);
11225 /* Check if the attribute's form is a DW_FORM_block*
11226 if so return true else false. */
11228 attr_form_is_block (struct attribute
*attr
)
11230 return (attr
== NULL
? 0 :
11231 attr
->form
== DW_FORM_block1
11232 || attr
->form
== DW_FORM_block2
11233 || attr
->form
== DW_FORM_block4
11234 || attr
->form
== DW_FORM_block
);
11237 /* Return non-zero if ATTR's value is a section offset --- classes
11238 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11239 You may use DW_UNSND (attr) to retrieve such offsets.
11241 Section 7.5.4, "Attribute Encodings", explains that no attribute
11242 may have a value that belongs to more than one of these classes; it
11243 would be ambiguous if we did, because we use the same forms for all
11246 attr_form_is_section_offset (struct attribute
*attr
)
11248 return (attr
->form
== DW_FORM_data4
11249 || attr
->form
== DW_FORM_data8
);
11253 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11254 zero otherwise. When this function returns true, you can apply
11255 dwarf2_get_attr_constant_value to it.
11257 However, note that for some attributes you must check
11258 attr_form_is_section_offset before using this test. DW_FORM_data4
11259 and DW_FORM_data8 are members of both the constant class, and of
11260 the classes that contain offsets into other debug sections
11261 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11262 that, if an attribute's can be either a constant or one of the
11263 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11264 taken as section offsets, not constants. */
11266 attr_form_is_constant (struct attribute
*attr
)
11268 switch (attr
->form
)
11270 case DW_FORM_sdata
:
11271 case DW_FORM_udata
:
11272 case DW_FORM_data1
:
11273 case DW_FORM_data2
:
11274 case DW_FORM_data4
:
11275 case DW_FORM_data8
:
11283 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11284 struct dwarf2_cu
*cu
)
11286 if (attr_form_is_section_offset (attr
)
11287 /* ".debug_loc" may not exist at all, or the offset may be outside
11288 the section. If so, fall through to the complaint in the
11290 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11292 struct dwarf2_loclist_baton
*baton
;
11294 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11295 sizeof (struct dwarf2_loclist_baton
));
11296 baton
->per_cu
= cu
->per_cu
;
11297 gdb_assert (baton
->per_cu
);
11299 /* We don't know how long the location list is, but make sure we
11300 don't run off the edge of the section. */
11301 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11302 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11303 baton
->base_address
= cu
->base_address
;
11304 if (cu
->base_known
== 0)
11305 complaint (&symfile_complaints
,
11306 _("Location list used without specifying the CU base address."));
11308 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11309 SYMBOL_LOCATION_BATON (sym
) = baton
;
11313 struct dwarf2_locexpr_baton
*baton
;
11315 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11316 sizeof (struct dwarf2_locexpr_baton
));
11317 baton
->per_cu
= cu
->per_cu
;
11318 gdb_assert (baton
->per_cu
);
11320 if (attr_form_is_block (attr
))
11322 /* Note that we're just copying the block's data pointer
11323 here, not the actual data. We're still pointing into the
11324 info_buffer for SYM's objfile; right now we never release
11325 that buffer, but when we do clean up properly this may
11327 baton
->size
= DW_BLOCK (attr
)->size
;
11328 baton
->data
= DW_BLOCK (attr
)->data
;
11332 dwarf2_invalid_attrib_class_complaint ("location description",
11333 SYMBOL_NATURAL_NAME (sym
));
11335 baton
->data
= NULL
;
11338 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11339 SYMBOL_LOCATION_BATON (sym
) = baton
;
11343 /* Return the OBJFILE associated with the compilation unit CU. */
11346 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11348 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11350 /* Return the master objfile, so that we can report and look up the
11351 correct file containing this variable. */
11352 if (objfile
->separate_debug_objfile_backlink
)
11353 objfile
= objfile
->separate_debug_objfile_backlink
;
11358 /* Return the address size given in the compilation unit header for CU. */
11361 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11364 return per_cu
->cu
->header
.addr_size
;
11367 /* If the CU is not currently read in, we re-read its header. */
11368 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11369 struct dwarf2_per_objfile
*per_objfile
11370 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11371 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11373 struct comp_unit_head cu_header
;
11374 memset (&cu_header
, 0, sizeof cu_header
);
11375 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11376 return cu_header
.addr_size
;
11380 /* Locate the .debug_info compilation unit from CU's objfile which contains
11381 the DIE at OFFSET. Raises an error on failure. */
11383 static struct dwarf2_per_cu_data
*
11384 dwarf2_find_containing_comp_unit (unsigned int offset
,
11385 struct objfile
*objfile
)
11387 struct dwarf2_per_cu_data
*this_cu
;
11391 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11394 int mid
= low
+ (high
- low
) / 2;
11395 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11400 gdb_assert (low
== high
);
11401 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11404 error (_("Dwarf Error: could not find partial DIE containing "
11405 "offset 0x%lx [in module %s]"),
11406 (long) offset
, bfd_get_filename (objfile
->obfd
));
11408 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11409 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11413 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11414 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11415 && offset
>= this_cu
->offset
+ this_cu
->length
)
11416 error (_("invalid dwarf2 offset %u"), offset
);
11417 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11422 /* Locate the compilation unit from OBJFILE which is located at exactly
11423 OFFSET. Raises an error on failure. */
11425 static struct dwarf2_per_cu_data
*
11426 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11428 struct dwarf2_per_cu_data
*this_cu
;
11429 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11430 if (this_cu
->offset
!= offset
)
11431 error (_("no compilation unit with offset %u."), offset
);
11435 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11437 static struct dwarf2_cu
*
11438 alloc_one_comp_unit (struct objfile
*objfile
)
11440 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11441 cu
->objfile
= objfile
;
11442 obstack_init (&cu
->comp_unit_obstack
);
11446 /* Release one cached compilation unit, CU. We unlink it from the tree
11447 of compilation units, but we don't remove it from the read_in_chain;
11448 the caller is responsible for that.
11449 NOTE: DATA is a void * because this function is also used as a
11450 cleanup routine. */
11453 free_one_comp_unit (void *data
)
11455 struct dwarf2_cu
*cu
= data
;
11457 if (cu
->per_cu
!= NULL
)
11458 cu
->per_cu
->cu
= NULL
;
11461 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11466 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11467 when we're finished with it. We can't free the pointer itself, but be
11468 sure to unlink it from the cache. Also release any associated storage
11469 and perform cache maintenance.
11471 Only used during partial symbol parsing. */
11474 free_stack_comp_unit (void *data
)
11476 struct dwarf2_cu
*cu
= data
;
11478 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11479 cu
->partial_dies
= NULL
;
11481 if (cu
->per_cu
!= NULL
)
11483 /* This compilation unit is on the stack in our caller, so we
11484 should not xfree it. Just unlink it. */
11485 cu
->per_cu
->cu
= NULL
;
11488 /* If we had a per-cu pointer, then we may have other compilation
11489 units loaded, so age them now. */
11490 age_cached_comp_units ();
11494 /* Free all cached compilation units. */
11497 free_cached_comp_units (void *data
)
11499 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11501 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11502 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11503 while (per_cu
!= NULL
)
11505 struct dwarf2_per_cu_data
*next_cu
;
11507 next_cu
= per_cu
->cu
->read_in_chain
;
11509 free_one_comp_unit (per_cu
->cu
);
11510 *last_chain
= next_cu
;
11516 /* Increase the age counter on each cached compilation unit, and free
11517 any that are too old. */
11520 age_cached_comp_units (void)
11522 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11524 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11525 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11526 while (per_cu
!= NULL
)
11528 per_cu
->cu
->last_used
++;
11529 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11530 dwarf2_mark (per_cu
->cu
);
11531 per_cu
= per_cu
->cu
->read_in_chain
;
11534 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11535 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11536 while (per_cu
!= NULL
)
11538 struct dwarf2_per_cu_data
*next_cu
;
11540 next_cu
= per_cu
->cu
->read_in_chain
;
11542 if (!per_cu
->cu
->mark
)
11544 free_one_comp_unit (per_cu
->cu
);
11545 *last_chain
= next_cu
;
11548 last_chain
= &per_cu
->cu
->read_in_chain
;
11554 /* Remove a single compilation unit from the cache. */
11557 free_one_cached_comp_unit (void *target_cu
)
11559 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11561 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11562 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11563 while (per_cu
!= NULL
)
11565 struct dwarf2_per_cu_data
*next_cu
;
11567 next_cu
= per_cu
->cu
->read_in_chain
;
11569 if (per_cu
->cu
== target_cu
)
11571 free_one_comp_unit (per_cu
->cu
);
11572 *last_chain
= next_cu
;
11576 last_chain
= &per_cu
->cu
->read_in_chain
;
11582 /* Release all extra memory associated with OBJFILE. */
11585 dwarf2_free_objfile (struct objfile
*objfile
)
11587 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11589 if (dwarf2_per_objfile
== NULL
)
11592 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11593 free_cached_comp_units (NULL
);
11595 /* Everything else should be on the objfile obstack. */
11598 /* A pair of DIE offset and GDB type pointer. We store these
11599 in a hash table separate from the DIEs, and preserve them
11600 when the DIEs are flushed out of cache. */
11602 struct dwarf2_offset_and_type
11604 unsigned int offset
;
11608 /* Hash function for a dwarf2_offset_and_type. */
11611 offset_and_type_hash (const void *item
)
11613 const struct dwarf2_offset_and_type
*ofs
= item
;
11614 return ofs
->offset
;
11617 /* Equality function for a dwarf2_offset_and_type. */
11620 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11622 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11623 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11624 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11627 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11628 table if necessary. For convenience, return TYPE. */
11630 static struct type
*
11631 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11633 struct dwarf2_offset_and_type
**slot
, ofs
;
11635 if (cu
->type_hash
== NULL
)
11637 gdb_assert (cu
->per_cu
!= NULL
);
11638 cu
->per_cu
->type_hash
11639 = htab_create_alloc_ex (cu
->header
.length
/ 24,
11640 offset_and_type_hash
,
11641 offset_and_type_eq
,
11643 &cu
->objfile
->objfile_obstack
,
11644 hashtab_obstack_allocate
,
11645 dummy_obstack_deallocate
);
11646 cu
->type_hash
= cu
->per_cu
->type_hash
;
11649 ofs
.offset
= die
->offset
;
11651 slot
= (struct dwarf2_offset_and_type
**)
11652 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
11653 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
11658 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11659 not have a saved type. */
11661 static struct type
*
11662 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11664 struct dwarf2_offset_and_type
*slot
, ofs
;
11665 htab_t type_hash
= cu
->type_hash
;
11667 if (type_hash
== NULL
)
11670 ofs
.offset
= die
->offset
;
11671 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
11678 /* Add a dependence relationship from CU to REF_PER_CU. */
11681 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
11682 struct dwarf2_per_cu_data
*ref_per_cu
)
11686 if (cu
->dependencies
== NULL
)
11688 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
11689 NULL
, &cu
->comp_unit_obstack
,
11690 hashtab_obstack_allocate
,
11691 dummy_obstack_deallocate
);
11693 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
11695 *slot
= ref_per_cu
;
11698 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11699 Set the mark field in every compilation unit in the
11700 cache that we must keep because we are keeping CU. */
11703 dwarf2_mark_helper (void **slot
, void *data
)
11705 struct dwarf2_per_cu_data
*per_cu
;
11707 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
11708 if (per_cu
->cu
->mark
)
11710 per_cu
->cu
->mark
= 1;
11712 if (per_cu
->cu
->dependencies
!= NULL
)
11713 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11718 /* Set the mark field in CU and in every other compilation unit in the
11719 cache that we must keep because we are keeping CU. */
11722 dwarf2_mark (struct dwarf2_cu
*cu
)
11727 if (cu
->dependencies
!= NULL
)
11728 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11732 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
11736 per_cu
->cu
->mark
= 0;
11737 per_cu
= per_cu
->cu
->read_in_chain
;
11741 /* Trivial hash function for partial_die_info: the hash value of a DIE
11742 is its offset in .debug_info for this objfile. */
11745 partial_die_hash (const void *item
)
11747 const struct partial_die_info
*part_die
= item
;
11748 return part_die
->offset
;
11751 /* Trivial comparison function for partial_die_info structures: two DIEs
11752 are equal if they have the same offset. */
11755 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
11757 const struct partial_die_info
*part_die_lhs
= item_lhs
;
11758 const struct partial_die_info
*part_die_rhs
= item_rhs
;
11759 return part_die_lhs
->offset
== part_die_rhs
->offset
;
11762 static struct cmd_list_element
*set_dwarf2_cmdlist
;
11763 static struct cmd_list_element
*show_dwarf2_cmdlist
;
11766 set_dwarf2_cmd (char *args
, int from_tty
)
11768 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
11772 show_dwarf2_cmd (char *args
, int from_tty
)
11774 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
11777 /* If section described by INFO was mmapped, munmap it now. */
11780 munmap_section_buffer (struct dwarf2_section_info
*info
)
11782 if (info
->was_mmapped
)
11785 intptr_t begin
= (intptr_t) info
->buffer
;
11786 intptr_t map_begin
= begin
& ~(pagesize
- 1);
11787 size_t map_length
= info
->size
+ begin
- map_begin
;
11788 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
11790 /* Without HAVE_MMAP, we should never be here to begin with. */
11796 /* munmap debug sections for OBJFILE, if necessary. */
11799 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
11801 struct dwarf2_per_objfile
*data
= d
;
11802 munmap_section_buffer (&data
->info
);
11803 munmap_section_buffer (&data
->abbrev
);
11804 munmap_section_buffer (&data
->line
);
11805 munmap_section_buffer (&data
->str
);
11806 munmap_section_buffer (&data
->macinfo
);
11807 munmap_section_buffer (&data
->ranges
);
11808 munmap_section_buffer (&data
->loc
);
11809 munmap_section_buffer (&data
->frame
);
11810 munmap_section_buffer (&data
->eh_frame
);
11813 void _initialize_dwarf2_read (void);
11816 _initialize_dwarf2_read (void)
11818 dwarf2_objfile_data_key
11819 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
11821 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
11822 Set DWARF 2 specific variables.\n\
11823 Configure DWARF 2 variables such as the cache size"),
11824 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
11825 0/*allow-unknown*/, &maintenance_set_cmdlist
);
11827 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
11828 Show DWARF 2 specific variables\n\
11829 Show DWARF 2 variables such as the cache size"),
11830 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
11831 0/*allow-unknown*/, &maintenance_show_cmdlist
);
11833 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
11834 &dwarf2_max_cache_age
, _("\
11835 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
11836 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
11837 A higher limit means that cached compilation units will be stored\n\
11838 in memory longer, and more total memory will be used. Zero disables\n\
11839 caching, which can slow down startup."),
11841 show_dwarf2_max_cache_age
,
11842 &set_dwarf2_cmdlist
,
11843 &show_dwarf2_cmdlist
);
11845 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
11846 Set debugging of the dwarf2 DIE reader."), _("\
11847 Show debugging of the dwarf2 DIE reader."), _("\
11848 When enabled (non-zero), DIEs are dumped after they are read in.\n\
11849 The value is the maximum depth to print."),
11852 &setdebuglist
, &showdebuglist
);