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
;
642 *fields
, *baseclasses
;
644 /* Number of fields (including baseclasses). */
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 /* If this compilation unit was already read in, free the
1891 cached copy in order to read it in again. This is
1892 necessary because we skipped some symbols when we first
1893 read in the compilation unit (see load_partial_dies).
1894 This problem could be avoided, but the benefit is
1896 if (this_cu
->cu
!= NULL
)
1897 free_one_cached_comp_unit (this_cu
->cu
);
1899 /* Note that this is a pointer to our stack frame, being
1900 added to a global data structure. It will be cleaned up
1901 in free_stack_comp_unit when we finish with this
1902 compilation unit. */
1904 cu
.per_cu
= this_cu
;
1906 /* Read the abbrevs for this compilation unit into a table. */
1907 dwarf2_read_abbrevs (abfd
, &cu
);
1908 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1910 /* Read the compilation unit die. */
1911 if (this_cu
->from_debug_types
)
1912 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1913 init_cu_die_reader (&reader_specs
, &cu
);
1914 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1917 if (this_cu
->from_debug_types
)
1919 /* offset,length haven't been set yet for type units. */
1920 this_cu
->offset
= cu
.header
.offset
;
1921 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1923 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1925 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1926 + cu
.header
.initial_length_size
);
1927 do_cleanups (back_to_inner
);
1931 /* Set the language we're debugging. */
1932 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1934 set_cu_language (DW_UNSND (attr
), &cu
);
1936 set_cu_language (language_minimal
, &cu
);
1938 /* Allocate a new partial symbol table structure. */
1939 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1940 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1941 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1942 /* TEXTLOW and TEXTHIGH are set below. */
1944 objfile
->global_psymbols
.next
,
1945 objfile
->static_psymbols
.next
);
1947 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1949 pst
->dirname
= DW_STRING (attr
);
1951 pst
->read_symtab_private
= (char *) this_cu
;
1953 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1955 /* Store the function that reads in the rest of the symbol table */
1956 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1958 this_cu
->psymtab
= pst
;
1960 dwarf2_find_base_address (comp_unit_die
, &cu
);
1962 /* Possibly set the default values of LOWPC and HIGHPC from
1964 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1965 &best_highpc
, &cu
, pst
);
1966 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1967 /* Store the contiguous range if it is not empty; it can be empty for
1968 CUs with no code. */
1969 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1970 best_lowpc
+ baseaddr
,
1971 best_highpc
+ baseaddr
- 1, pst
);
1973 /* Check if comp unit has_children.
1974 If so, read the rest of the partial symbols from this comp unit.
1975 If not, there's no more debug_info for this comp unit. */
1978 struct partial_die_info
*first_die
;
1979 CORE_ADDR lowpc
, highpc
;
1981 lowpc
= ((CORE_ADDR
) -1);
1982 highpc
= ((CORE_ADDR
) 0);
1984 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1986 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1987 ! has_pc_info
, &cu
);
1989 /* If we didn't find a lowpc, set it to highpc to avoid
1990 complaints from `maint check'. */
1991 if (lowpc
== ((CORE_ADDR
) -1))
1994 /* If the compilation unit didn't have an explicit address range,
1995 then use the information extracted from its child dies. */
1999 best_highpc
= highpc
;
2002 pst
->textlow
= best_lowpc
+ baseaddr
;
2003 pst
->texthigh
= best_highpc
+ baseaddr
;
2005 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
2006 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2007 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
2008 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2009 sort_pst_symbols (pst
);
2011 /* If there is already a psymtab or symtab for a file of this
2012 name, remove it. (If there is a symtab, more drastic things
2013 also happen.) This happens in VxWorks. */
2014 if (! this_cu
->from_debug_types
)
2015 free_named_symtabs (pst
->filename
);
2017 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
2018 + cu
.header
.initial_length_size
);
2020 if (this_cu
->from_debug_types
)
2022 /* It's not clear we want to do anything with stmt lists here.
2023 Waiting to see what gcc ultimately does. */
2027 /* Get the list of files included in the current compilation unit,
2028 and build a psymtab for each of them. */
2029 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
2032 do_cleanups (back_to_inner
);
2037 /* Traversal function for htab_traverse_noresize.
2038 Process one .debug_types comp-unit. */
2041 process_type_comp_unit (void **slot
, void *info
)
2043 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
2044 struct objfile
*objfile
= (struct objfile
*) info
;
2045 struct dwarf2_per_cu_data
*this_cu
;
2047 this_cu
= &entry
->per_cu
;
2048 this_cu
->from_debug_types
= 1;
2050 process_psymtab_comp_unit (objfile
, this_cu
,
2051 dwarf2_per_objfile
->types
.buffer
,
2052 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
2053 dwarf2_per_objfile
->types
.size
);
2058 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
2059 Build partial symbol tables for the .debug_types comp-units. */
2062 build_type_psymtabs (struct objfile
*objfile
)
2064 if (! create_debug_types_hash_table (objfile
))
2067 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
2068 process_type_comp_unit
, objfile
);
2071 /* Build the partial symbol table by doing a quick pass through the
2072 .debug_info and .debug_abbrev sections. */
2075 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
2077 /* Instead of reading this into a big buffer, we should probably use
2078 mmap() on architectures that support it. (FIXME) */
2079 bfd
*abfd
= objfile
->obfd
;
2081 struct cleanup
*back_to
;
2083 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2085 /* Any cached compilation units will be linked by the per-objfile
2086 read_in_chain. Make sure to free them when we're done. */
2087 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2089 build_type_psymtabs (objfile
);
2091 create_all_comp_units (objfile
);
2093 objfile
->psymtabs_addrmap
=
2094 addrmap_create_mutable (&objfile
->objfile_obstack
);
2096 /* Since the objects we're extracting from .debug_info vary in
2097 length, only the individual functions to extract them (like
2098 read_comp_unit_head and load_partial_die) can really know whether
2099 the buffer is large enough to hold another complete object.
2101 At the moment, they don't actually check that. If .debug_info
2102 holds just one extra byte after the last compilation unit's dies,
2103 then read_comp_unit_head will happily read off the end of the
2104 buffer. read_partial_die is similarly casual. Those functions
2107 For this loop condition, simply checking whether there's any data
2108 left at all should be sufficient. */
2110 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2111 + dwarf2_per_objfile
->info
.size
))
2113 struct dwarf2_per_cu_data
*this_cu
;
2115 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2118 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2119 dwarf2_per_objfile
->info
.buffer
,
2121 dwarf2_per_objfile
->info
.size
);
2124 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2125 &objfile
->objfile_obstack
);
2127 do_cleanups (back_to
);
2130 /* Load the partial DIEs for a secondary CU into memory. */
2133 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2134 struct objfile
*objfile
)
2136 bfd
*abfd
= objfile
->obfd
;
2137 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2138 struct die_info
*comp_unit_die
;
2139 struct dwarf2_cu
*cu
;
2140 unsigned int bytes_read
;
2141 struct cleanup
*back_to
;
2142 struct attribute
*attr
;
2144 struct die_reader_specs reader_specs
;
2146 gdb_assert (! this_cu
->from_debug_types
);
2148 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2149 beg_of_comp_unit
= info_ptr
;
2151 cu
= alloc_one_comp_unit (objfile
);
2153 /* ??? Missing cleanup for CU? */
2155 /* Link this compilation unit into the compilation unit tree. */
2157 cu
->per_cu
= this_cu
;
2158 cu
->type_hash
= this_cu
->type_hash
;
2160 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2161 dwarf2_per_objfile
->info
.buffer
,
2162 dwarf2_per_objfile
->info
.size
,
2165 /* Complete the cu_header. */
2166 cu
->header
.offset
= this_cu
->offset
;
2167 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2169 /* Read the abbrevs for this compilation unit into a table. */
2170 dwarf2_read_abbrevs (abfd
, cu
);
2171 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2173 /* Read the compilation unit die. */
2174 init_cu_die_reader (&reader_specs
, cu
);
2175 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2178 /* Set the language we're debugging. */
2179 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2181 set_cu_language (DW_UNSND (attr
), cu
);
2183 set_cu_language (language_minimal
, cu
);
2185 /* Check if comp unit has_children.
2186 If so, read the rest of the partial symbols from this comp unit.
2187 If not, there's no more debug_info for this comp unit. */
2189 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2191 do_cleanups (back_to
);
2194 /* Create a list of all compilation units in OBJFILE. We do this only
2195 if an inter-comp-unit reference is found; presumably if there is one,
2196 there will be many, and one will occur early in the .debug_info section.
2197 So there's no point in building this list incrementally. */
2200 create_all_comp_units (struct objfile
*objfile
)
2204 struct dwarf2_per_cu_data
**all_comp_units
;
2205 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2209 all_comp_units
= xmalloc (n_allocated
2210 * sizeof (struct dwarf2_per_cu_data
*));
2212 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2214 unsigned int length
, initial_length_size
;
2215 gdb_byte
*beg_of_comp_unit
;
2216 struct dwarf2_per_cu_data
*this_cu
;
2217 unsigned int offset
;
2219 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2221 /* Read just enough information to find out where the next
2222 compilation unit is. */
2223 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2224 &initial_length_size
);
2226 /* Save the compilation unit for later lookup. */
2227 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2228 sizeof (struct dwarf2_per_cu_data
));
2229 memset (this_cu
, 0, sizeof (*this_cu
));
2230 this_cu
->offset
= offset
;
2231 this_cu
->length
= length
+ initial_length_size
;
2233 if (n_comp_units
== n_allocated
)
2236 all_comp_units
= xrealloc (all_comp_units
,
2238 * sizeof (struct dwarf2_per_cu_data
*));
2240 all_comp_units
[n_comp_units
++] = this_cu
;
2242 info_ptr
= info_ptr
+ this_cu
->length
;
2245 dwarf2_per_objfile
->all_comp_units
2246 = obstack_alloc (&objfile
->objfile_obstack
,
2247 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2248 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2249 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2250 xfree (all_comp_units
);
2251 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2254 /* Process all loaded DIEs for compilation unit CU, starting at
2255 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2256 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2257 DW_AT_ranges). If NEED_PC is set, then this function will set
2258 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2259 and record the covered ranges in the addrmap. */
2262 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2263 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2265 struct objfile
*objfile
= cu
->objfile
;
2266 bfd
*abfd
= objfile
->obfd
;
2267 struct partial_die_info
*pdi
;
2269 /* Now, march along the PDI's, descending into ones which have
2270 interesting children but skipping the children of the other ones,
2271 until we reach the end of the compilation unit. */
2277 fixup_partial_die (pdi
, cu
);
2279 /* Anonymous namespaces have no name but have interesting
2280 children, so we need to look at them. Ditto for anonymous
2283 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2284 || pdi
->tag
== DW_TAG_enumeration_type
)
2288 case DW_TAG_subprogram
:
2289 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2291 case DW_TAG_variable
:
2292 case DW_TAG_typedef
:
2293 case DW_TAG_union_type
:
2294 if (!pdi
->is_declaration
)
2296 add_partial_symbol (pdi
, cu
);
2299 case DW_TAG_class_type
:
2300 case DW_TAG_interface_type
:
2301 case DW_TAG_structure_type
:
2302 if (!pdi
->is_declaration
)
2304 add_partial_symbol (pdi
, cu
);
2307 case DW_TAG_enumeration_type
:
2308 if (!pdi
->is_declaration
)
2309 add_partial_enumeration (pdi
, cu
);
2311 case DW_TAG_base_type
:
2312 case DW_TAG_subrange_type
:
2313 /* File scope base type definitions are added to the partial
2315 add_partial_symbol (pdi
, cu
);
2317 case DW_TAG_namespace
:
2318 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2321 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2328 /* If the die has a sibling, skip to the sibling. */
2330 pdi
= pdi
->die_sibling
;
2334 /* Functions used to compute the fully scoped name of a partial DIE.
2336 Normally, this is simple. For C++, the parent DIE's fully scoped
2337 name is concatenated with "::" and the partial DIE's name. For
2338 Java, the same thing occurs except that "." is used instead of "::".
2339 Enumerators are an exception; they use the scope of their parent
2340 enumeration type, i.e. the name of the enumeration type is not
2341 prepended to the enumerator.
2343 There are two complexities. One is DW_AT_specification; in this
2344 case "parent" means the parent of the target of the specification,
2345 instead of the direct parent of the DIE. The other is compilers
2346 which do not emit DW_TAG_namespace; in this case we try to guess
2347 the fully qualified name of structure types from their members'
2348 linkage names. This must be done using the DIE's children rather
2349 than the children of any DW_AT_specification target. We only need
2350 to do this for structures at the top level, i.e. if the target of
2351 any DW_AT_specification (if any; otherwise the DIE itself) does not
2354 /* Compute the scope prefix associated with PDI's parent, in
2355 compilation unit CU. The result will be allocated on CU's
2356 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2357 field. NULL is returned if no prefix is necessary. */
2359 partial_die_parent_scope (struct partial_die_info
*pdi
,
2360 struct dwarf2_cu
*cu
)
2362 char *grandparent_scope
;
2363 struct partial_die_info
*parent
, *real_pdi
;
2365 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2366 then this means the parent of the specification DIE. */
2369 while (real_pdi
->has_specification
)
2370 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2372 parent
= real_pdi
->die_parent
;
2376 if (parent
->scope_set
)
2377 return parent
->scope
;
2379 fixup_partial_die (parent
, cu
);
2381 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2383 if (parent
->tag
== DW_TAG_namespace
2384 || parent
->tag
== DW_TAG_structure_type
2385 || parent
->tag
== DW_TAG_class_type
2386 || parent
->tag
== DW_TAG_interface_type
2387 || parent
->tag
== DW_TAG_union_type
)
2389 if (grandparent_scope
== NULL
)
2390 parent
->scope
= parent
->name
;
2392 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2395 else if (parent
->tag
== DW_TAG_enumeration_type
)
2396 /* Enumerators should not get the name of the enumeration as a prefix. */
2397 parent
->scope
= grandparent_scope
;
2400 /* FIXME drow/2004-04-01: What should we be doing with
2401 function-local names? For partial symbols, we should probably be
2403 complaint (&symfile_complaints
,
2404 _("unhandled containing DIE tag %d for DIE at %d"),
2405 parent
->tag
, pdi
->offset
);
2406 parent
->scope
= grandparent_scope
;
2409 parent
->scope_set
= 1;
2410 return parent
->scope
;
2413 /* Return the fully scoped name associated with PDI, from compilation unit
2414 CU. The result will be allocated with malloc. */
2416 partial_die_full_name (struct partial_die_info
*pdi
,
2417 struct dwarf2_cu
*cu
)
2421 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2422 if (parent_scope
== NULL
)
2425 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
2429 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2431 struct objfile
*objfile
= cu
->objfile
;
2433 char *actual_name
= NULL
;
2434 const char *my_prefix
;
2435 const struct partial_symbol
*psym
= NULL
;
2437 int built_actual_name
= 0;
2439 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2441 if (pdi_needs_namespace (pdi
->tag
))
2443 actual_name
= partial_die_full_name (pdi
, cu
);
2445 built_actual_name
= 1;
2448 if (actual_name
== NULL
)
2449 actual_name
= pdi
->name
;
2453 case DW_TAG_subprogram
:
2454 if (pdi
->is_external
|| cu
->language
== language_ada
)
2456 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2457 of the global scope. But in Ada, we want to be able to access
2458 nested procedures globally. So all Ada subprograms are stored
2459 in the global scope. */
2460 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2461 mst_text, objfile); */
2462 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2463 VAR_DOMAIN
, LOC_BLOCK
,
2464 &objfile
->global_psymbols
,
2465 0, pdi
->lowpc
+ baseaddr
,
2466 cu
->language
, objfile
);
2470 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2471 mst_file_text, objfile); */
2472 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2473 VAR_DOMAIN
, LOC_BLOCK
,
2474 &objfile
->static_psymbols
,
2475 0, pdi
->lowpc
+ baseaddr
,
2476 cu
->language
, objfile
);
2479 case DW_TAG_variable
:
2480 if (pdi
->is_external
)
2483 Don't enter into the minimal symbol tables as there is
2484 a minimal symbol table entry from the ELF symbols already.
2485 Enter into partial symbol table if it has a location
2486 descriptor or a type.
2487 If the location descriptor is missing, new_symbol will create
2488 a LOC_UNRESOLVED symbol, the address of the variable will then
2489 be determined from the minimal symbol table whenever the variable
2491 The address for the partial symbol table entry is not
2492 used by GDB, but it comes in handy for debugging partial symbol
2496 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2497 if (pdi
->locdesc
|| pdi
->has_type
)
2498 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2499 VAR_DOMAIN
, LOC_STATIC
,
2500 &objfile
->global_psymbols
,
2502 cu
->language
, objfile
);
2506 /* Static Variable. Skip symbols without location descriptors. */
2507 if (pdi
->locdesc
== NULL
)
2509 if (built_actual_name
)
2510 xfree (actual_name
);
2513 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2514 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2515 mst_file_data, objfile); */
2516 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2517 VAR_DOMAIN
, LOC_STATIC
,
2518 &objfile
->static_psymbols
,
2520 cu
->language
, objfile
);
2523 case DW_TAG_typedef
:
2524 case DW_TAG_base_type
:
2525 case DW_TAG_subrange_type
:
2526 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2527 VAR_DOMAIN
, LOC_TYPEDEF
,
2528 &objfile
->static_psymbols
,
2529 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2531 case DW_TAG_namespace
:
2532 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2533 VAR_DOMAIN
, LOC_TYPEDEF
,
2534 &objfile
->global_psymbols
,
2535 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2537 case DW_TAG_class_type
:
2538 case DW_TAG_interface_type
:
2539 case DW_TAG_structure_type
:
2540 case DW_TAG_union_type
:
2541 case DW_TAG_enumeration_type
:
2542 /* Skip external references. The DWARF standard says in the section
2543 about "Structure, Union, and Class Type Entries": "An incomplete
2544 structure, union or class type is represented by a structure,
2545 union or class entry that does not have a byte size attribute
2546 and that has a DW_AT_declaration attribute." */
2547 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2549 if (built_actual_name
)
2550 xfree (actual_name
);
2554 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2555 static vs. global. */
2556 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2557 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2558 (cu
->language
== language_cplus
2559 || cu
->language
== language_java
)
2560 ? &objfile
->global_psymbols
2561 : &objfile
->static_psymbols
,
2562 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2565 case DW_TAG_enumerator
:
2566 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2567 VAR_DOMAIN
, LOC_CONST
,
2568 (cu
->language
== language_cplus
2569 || cu
->language
== language_java
)
2570 ? &objfile
->global_psymbols
2571 : &objfile
->static_psymbols
,
2572 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2578 /* Check to see if we should scan the name for possible namespace
2579 info. Only do this if this is C++, if we don't have namespace
2580 debugging info in the file, if the psym is of an appropriate type
2581 (otherwise we'll have psym == NULL), and if we actually had a
2582 mangled name to begin with. */
2584 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2585 cases which do not set PSYM above? */
2587 if (cu
->language
== language_cplus
2588 && cu
->has_namespace_info
== 0
2590 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2591 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2594 if (built_actual_name
)
2595 xfree (actual_name
);
2598 /* Determine whether a die of type TAG living in a C++ class or
2599 namespace needs to have the name of the scope prepended to the
2600 name listed in the die. */
2603 pdi_needs_namespace (enum dwarf_tag tag
)
2607 case DW_TAG_namespace
:
2608 case DW_TAG_typedef
:
2609 case DW_TAG_class_type
:
2610 case DW_TAG_interface_type
:
2611 case DW_TAG_structure_type
:
2612 case DW_TAG_union_type
:
2613 case DW_TAG_enumeration_type
:
2614 case DW_TAG_enumerator
:
2621 /* Read a partial die corresponding to a namespace; also, add a symbol
2622 corresponding to that namespace to the symbol table. NAMESPACE is
2623 the name of the enclosing namespace. */
2626 add_partial_namespace (struct partial_die_info
*pdi
,
2627 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2628 int need_pc
, struct dwarf2_cu
*cu
)
2630 struct objfile
*objfile
= cu
->objfile
;
2632 /* Add a symbol for the namespace. */
2634 add_partial_symbol (pdi
, cu
);
2636 /* Now scan partial symbols in that namespace. */
2638 if (pdi
->has_children
)
2639 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2642 /* Read a partial die corresponding to a Fortran module. */
2645 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2646 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2648 /* Now scan partial symbols in that module.
2650 FIXME: Support the separate Fortran module namespaces. */
2652 if (pdi
->has_children
)
2653 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2656 /* Read a partial die corresponding to a subprogram and create a partial
2657 symbol for that subprogram. When the CU language allows it, this
2658 routine also defines a partial symbol for each nested subprogram
2659 that this subprogram contains.
2661 DIE my also be a lexical block, in which case we simply search
2662 recursively for suprograms defined inside that lexical block.
2663 Again, this is only performed when the CU language allows this
2664 type of definitions. */
2667 add_partial_subprogram (struct partial_die_info
*pdi
,
2668 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2669 int need_pc
, struct dwarf2_cu
*cu
)
2671 if (pdi
->tag
== DW_TAG_subprogram
)
2673 if (pdi
->has_pc_info
)
2675 if (pdi
->lowpc
< *lowpc
)
2676 *lowpc
= pdi
->lowpc
;
2677 if (pdi
->highpc
> *highpc
)
2678 *highpc
= pdi
->highpc
;
2682 struct objfile
*objfile
= cu
->objfile
;
2684 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2685 SECT_OFF_TEXT (objfile
));
2686 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2687 pdi
->lowpc
, pdi
->highpc
- 1,
2688 cu
->per_cu
->psymtab
);
2690 if (!pdi
->is_declaration
)
2691 add_partial_symbol (pdi
, cu
);
2695 if (! pdi
->has_children
)
2698 if (cu
->language
== language_ada
)
2700 pdi
= pdi
->die_child
;
2703 fixup_partial_die (pdi
, cu
);
2704 if (pdi
->tag
== DW_TAG_subprogram
2705 || pdi
->tag
== DW_TAG_lexical_block
)
2706 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2707 pdi
= pdi
->die_sibling
;
2712 /* See if we can figure out if the class lives in a namespace. We do
2713 this by looking for a member function; its demangled name will
2714 contain namespace info, if there is any. */
2717 guess_structure_name (struct partial_die_info
*struct_pdi
,
2718 struct dwarf2_cu
*cu
)
2720 if ((cu
->language
== language_cplus
2721 || cu
->language
== language_java
)
2722 && cu
->has_namespace_info
== 0
2723 && struct_pdi
->has_children
)
2725 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2726 what template types look like, because the demangler
2727 frequently doesn't give the same name as the debug info. We
2728 could fix this by only using the demangled name to get the
2729 prefix (but see comment in read_structure_type). */
2731 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2732 struct partial_die_info
*real_pdi
;
2734 /* If this DIE (this DIE's specification, if any) has a parent, then
2735 we should not do this. We'll prepend the parent's fully qualified
2736 name when we create the partial symbol. */
2738 real_pdi
= struct_pdi
;
2739 while (real_pdi
->has_specification
)
2740 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2742 if (real_pdi
->die_parent
!= NULL
)
2745 while (child_pdi
!= NULL
)
2747 if (child_pdi
->tag
== DW_TAG_subprogram
)
2749 char *actual_class_name
2750 = language_class_name_from_physname (cu
->language_defn
,
2752 if (actual_class_name
!= NULL
)
2755 = obsavestring (actual_class_name
,
2756 strlen (actual_class_name
),
2757 &cu
->comp_unit_obstack
);
2758 xfree (actual_class_name
);
2763 child_pdi
= child_pdi
->die_sibling
;
2768 /* Read a partial die corresponding to an enumeration type. */
2771 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2772 struct dwarf2_cu
*cu
)
2774 struct objfile
*objfile
= cu
->objfile
;
2775 bfd
*abfd
= objfile
->obfd
;
2776 struct partial_die_info
*pdi
;
2778 if (enum_pdi
->name
!= NULL
)
2779 add_partial_symbol (enum_pdi
, cu
);
2781 pdi
= enum_pdi
->die_child
;
2784 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2785 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2787 add_partial_symbol (pdi
, cu
);
2788 pdi
= pdi
->die_sibling
;
2792 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2793 Return the corresponding abbrev, or NULL if the number is zero (indicating
2794 an empty DIE). In either case *BYTES_READ will be set to the length of
2795 the initial number. */
2797 static struct abbrev_info
*
2798 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2799 struct dwarf2_cu
*cu
)
2801 bfd
*abfd
= cu
->objfile
->obfd
;
2802 unsigned int abbrev_number
;
2803 struct abbrev_info
*abbrev
;
2805 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2807 if (abbrev_number
== 0)
2810 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2813 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2814 bfd_get_filename (abfd
));
2820 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2821 Returns a pointer to the end of a series of DIEs, terminated by an empty
2822 DIE. Any children of the skipped DIEs will also be skipped. */
2825 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2827 struct abbrev_info
*abbrev
;
2828 unsigned int bytes_read
;
2832 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2834 return info_ptr
+ bytes_read
;
2836 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2840 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2841 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2842 abbrev corresponding to that skipped uleb128 should be passed in
2843 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2847 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2848 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2850 unsigned int bytes_read
;
2851 struct attribute attr
;
2852 bfd
*abfd
= cu
->objfile
->obfd
;
2853 unsigned int form
, i
;
2855 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2857 /* The only abbrev we care about is DW_AT_sibling. */
2858 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2860 read_attribute (&attr
, &abbrev
->attrs
[i
],
2861 abfd
, info_ptr
, cu
);
2862 if (attr
.form
== DW_FORM_ref_addr
)
2863 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2865 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2868 /* If it isn't DW_AT_sibling, skip this attribute. */
2869 form
= abbrev
->attrs
[i
].form
;
2874 case DW_FORM_ref_addr
:
2875 info_ptr
+= cu
->header
.addr_size
;
2895 case DW_FORM_string
:
2896 read_string (abfd
, info_ptr
, &bytes_read
);
2897 info_ptr
+= bytes_read
;
2900 info_ptr
+= cu
->header
.offset_size
;
2903 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2904 info_ptr
+= bytes_read
;
2906 case DW_FORM_block1
:
2907 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2909 case DW_FORM_block2
:
2910 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2912 case DW_FORM_block4
:
2913 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2917 case DW_FORM_ref_udata
:
2918 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2920 case DW_FORM_indirect
:
2921 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2922 info_ptr
+= bytes_read
;
2923 /* We need to continue parsing from here, so just go back to
2925 goto skip_attribute
;
2928 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2929 dwarf_form_name (form
),
2930 bfd_get_filename (abfd
));
2934 if (abbrev
->has_children
)
2935 return skip_children (buffer
, info_ptr
, cu
);
2940 /* Locate ORIG_PDI's sibling.
2941 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2945 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2946 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2947 bfd
*abfd
, struct dwarf2_cu
*cu
)
2949 /* Do we know the sibling already? */
2951 if (orig_pdi
->sibling
)
2952 return orig_pdi
->sibling
;
2954 /* Are there any children to deal with? */
2956 if (!orig_pdi
->has_children
)
2959 /* Skip the children the long way. */
2961 return skip_children (buffer
, info_ptr
, cu
);
2964 /* Expand this partial symbol table into a full symbol table. */
2967 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2969 /* FIXME: This is barely more than a stub. */
2974 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2980 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2981 gdb_flush (gdb_stdout
);
2984 /* Restore our global data. */
2985 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2986 dwarf2_objfile_data_key
);
2988 /* If this psymtab is constructed from a debug-only objfile, the
2989 has_section_at_zero flag will not necessarily be correct. We
2990 can get the correct value for this flag by looking at the data
2991 associated with the (presumably stripped) associated objfile. */
2992 if (pst
->objfile
->separate_debug_objfile_backlink
)
2994 struct dwarf2_per_objfile
*dpo_backlink
2995 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
2996 dwarf2_objfile_data_key
);
2997 dwarf2_per_objfile
->has_section_at_zero
2998 = dpo_backlink
->has_section_at_zero
;
3001 psymtab_to_symtab_1 (pst
);
3003 /* Finish up the debug error message. */
3005 printf_filtered (_("done.\n"));
3010 /* Add PER_CU to the queue. */
3013 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3015 struct dwarf2_queue_item
*item
;
3018 item
= xmalloc (sizeof (*item
));
3019 item
->per_cu
= per_cu
;
3022 if (dwarf2_queue
== NULL
)
3023 dwarf2_queue
= item
;
3025 dwarf2_queue_tail
->next
= item
;
3027 dwarf2_queue_tail
= item
;
3030 /* Process the queue. */
3033 process_queue (struct objfile
*objfile
)
3035 struct dwarf2_queue_item
*item
, *next_item
;
3037 /* The queue starts out with one item, but following a DIE reference
3038 may load a new CU, adding it to the end of the queue. */
3039 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
3041 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
3042 process_full_comp_unit (item
->per_cu
);
3044 item
->per_cu
->queued
= 0;
3045 next_item
= item
->next
;
3049 dwarf2_queue_tail
= NULL
;
3052 /* Free all allocated queue entries. This function only releases anything if
3053 an error was thrown; if the queue was processed then it would have been
3054 freed as we went along. */
3057 dwarf2_release_queue (void *dummy
)
3059 struct dwarf2_queue_item
*item
, *last
;
3061 item
= dwarf2_queue
;
3064 /* Anything still marked queued is likely to be in an
3065 inconsistent state, so discard it. */
3066 if (item
->per_cu
->queued
)
3068 if (item
->per_cu
->cu
!= NULL
)
3069 free_one_cached_comp_unit (item
->per_cu
->cu
);
3070 item
->per_cu
->queued
= 0;
3078 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
3081 /* Read in full symbols for PST, and anything it depends on. */
3084 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
3086 struct dwarf2_per_cu_data
*per_cu
;
3087 struct cleanup
*back_to
;
3090 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
3091 if (!pst
->dependencies
[i
]->readin
)
3093 /* Inform about additional files that need to be read in. */
3096 /* FIXME: i18n: Need to make this a single string. */
3097 fputs_filtered (" ", gdb_stdout
);
3099 fputs_filtered ("and ", gdb_stdout
);
3101 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
3102 wrap_here (""); /* Flush output */
3103 gdb_flush (gdb_stdout
);
3105 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3108 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
3112 /* It's an include file, no symbols to read for it.
3113 Everything is in the parent symtab. */
3118 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3120 queue_comp_unit (per_cu
, pst
->objfile
);
3122 if (per_cu
->from_debug_types
)
3123 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3125 load_full_comp_unit (per_cu
, pst
->objfile
);
3127 process_queue (pst
->objfile
);
3129 /* Age the cache, releasing compilation units that have not
3130 been used recently. */
3131 age_cached_comp_units ();
3133 do_cleanups (back_to
);
3136 /* Load the DIEs associated with PER_CU into memory. */
3139 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3141 bfd
*abfd
= objfile
->obfd
;
3142 struct dwarf2_cu
*cu
;
3143 unsigned int offset
;
3144 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3145 struct cleanup
*back_to
, *free_cu_cleanup
;
3146 struct attribute
*attr
;
3149 gdb_assert (! per_cu
->from_debug_types
);
3151 /* Set local variables from the partial symbol table info. */
3152 offset
= per_cu
->offset
;
3154 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3155 beg_of_comp_unit
= info_ptr
;
3157 cu
= alloc_one_comp_unit (objfile
);
3159 /* If an error occurs while loading, release our storage. */
3160 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3162 /* Read in the comp_unit header. */
3163 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3165 /* Complete the cu_header. */
3166 cu
->header
.offset
= offset
;
3167 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3169 /* Read the abbrevs for this compilation unit. */
3170 dwarf2_read_abbrevs (abfd
, cu
);
3171 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3173 /* Link this compilation unit into the compilation unit tree. */
3175 cu
->per_cu
= per_cu
;
3176 cu
->type_hash
= per_cu
->type_hash
;
3178 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3180 /* We try not to read any attributes in this function, because not
3181 all objfiles needed for references have been loaded yet, and symbol
3182 table processing isn't initialized. But we have to set the CU language,
3183 or we won't be able to build types correctly. */
3184 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3186 set_cu_language (DW_UNSND (attr
), cu
);
3188 set_cu_language (language_minimal
, cu
);
3190 /* Link this CU into read_in_chain. */
3191 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3192 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3194 do_cleanups (back_to
);
3196 /* We've successfully allocated this compilation unit. Let our caller
3197 clean it up when finished with it. */
3198 discard_cleanups (free_cu_cleanup
);
3201 /* Generate full symbol information for PST and CU, whose DIEs have
3202 already been loaded into memory. */
3205 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3207 struct partial_symtab
*pst
= per_cu
->psymtab
;
3208 struct dwarf2_cu
*cu
= per_cu
->cu
;
3209 struct objfile
*objfile
= pst
->objfile
;
3210 bfd
*abfd
= objfile
->obfd
;
3211 CORE_ADDR lowpc
, highpc
;
3212 struct symtab
*symtab
;
3213 struct cleanup
*back_to
;
3216 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3219 back_to
= make_cleanup (really_free_pendings
, NULL
);
3221 cu
->list_in_scope
= &file_symbols
;
3223 dwarf2_find_base_address (cu
->dies
, cu
);
3225 /* Do line number decoding in read_file_scope () */
3226 process_die (cu
->dies
, cu
);
3228 /* Some compilers don't define a DW_AT_high_pc attribute for the
3229 compilation unit. If the DW_AT_high_pc is missing, synthesize
3230 it, by scanning the DIE's below the compilation unit. */
3231 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3233 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3235 /* Set symtab language to language from DW_AT_language.
3236 If the compilation is from a C file generated by language preprocessors,
3237 do not set the language if it was already deduced by start_subfile. */
3239 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3241 symtab
->language
= cu
->language
;
3243 pst
->symtab
= symtab
;
3246 do_cleanups (back_to
);
3249 /* Process a die and its children. */
3252 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3256 case DW_TAG_padding
:
3258 case DW_TAG_compile_unit
:
3259 read_file_scope (die
, cu
);
3261 case DW_TAG_type_unit
:
3262 read_type_unit_scope (die
, cu
);
3264 case DW_TAG_subprogram
:
3265 case DW_TAG_inlined_subroutine
:
3266 read_func_scope (die
, cu
);
3268 case DW_TAG_lexical_block
:
3269 case DW_TAG_try_block
:
3270 case DW_TAG_catch_block
:
3271 read_lexical_block_scope (die
, cu
);
3273 case DW_TAG_class_type
:
3274 case DW_TAG_interface_type
:
3275 case DW_TAG_structure_type
:
3276 case DW_TAG_union_type
:
3277 process_structure_scope (die
, cu
);
3279 case DW_TAG_enumeration_type
:
3280 process_enumeration_scope (die
, cu
);
3283 /* These dies have a type, but processing them does not create
3284 a symbol or recurse to process the children. Therefore we can
3285 read them on-demand through read_type_die. */
3286 case DW_TAG_subroutine_type
:
3287 case DW_TAG_set_type
:
3288 case DW_TAG_array_type
:
3289 case DW_TAG_pointer_type
:
3290 case DW_TAG_ptr_to_member_type
:
3291 case DW_TAG_reference_type
:
3292 case DW_TAG_string_type
:
3295 case DW_TAG_base_type
:
3296 case DW_TAG_subrange_type
:
3297 case DW_TAG_typedef
:
3298 /* Add a typedef symbol for the type definition, if it has a
3300 new_symbol (die
, read_type_die (die
, cu
), cu
);
3302 case DW_TAG_common_block
:
3303 read_common_block (die
, cu
);
3305 case DW_TAG_common_inclusion
:
3307 case DW_TAG_namespace
:
3308 processing_has_namespace_info
= 1;
3309 read_namespace (die
, cu
);
3312 read_module (die
, cu
);
3314 case DW_TAG_imported_declaration
:
3315 case DW_TAG_imported_module
:
3316 processing_has_namespace_info
= 1;
3317 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3318 || cu
->language
!= language_fortran
))
3319 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3320 dwarf_tag_name (die
->tag
));
3321 read_import_statement (die
, cu
);
3324 new_symbol (die
, NULL
, cu
);
3329 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3330 If scope qualifiers are appropriate they will be added. The result
3331 will be allocated on the objfile_obstack, or NULL if the DIE does
3335 dwarf2_full_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
3337 struct attribute
*attr
;
3338 char *prefix
, *name
;
3339 struct ui_file
*buf
= NULL
;
3341 name
= dwarf2_name (die
, cu
);
3345 /* These are the only languages we know how to qualify names in. */
3346 if (cu
->language
!= language_cplus
3347 && cu
->language
!= language_java
)
3350 /* If no prefix is necessary for this type of DIE, return the
3351 unqualified name. The other three tags listed could be handled
3352 in pdi_needs_namespace, but that requires broader changes. */
3353 if (!pdi_needs_namespace (die
->tag
)
3354 && die
->tag
!= DW_TAG_subprogram
3355 && die
->tag
!= DW_TAG_variable
3356 && die
->tag
!= DW_TAG_member
)
3359 prefix
= determine_prefix (die
, cu
);
3360 if (*prefix
!= '\0')
3361 name
= typename_concat (&cu
->objfile
->objfile_obstack
, prefix
,
3367 /* Read the import statement specified by the given die and record it. */
3370 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3372 struct attribute
*import_attr
;
3373 struct die_info
*imported_die
;
3374 struct dwarf2_cu
*imported_cu
;
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
));
3389 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3390 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3391 if (imported_name
== NULL
)
3393 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3395 The import in the following code:
3409 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3410 <52> DW_AT_decl_file : 1
3411 <53> DW_AT_decl_line : 6
3412 <54> DW_AT_import : <0x75>
3413 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3415 <5b> DW_AT_decl_file : 1
3416 <5c> DW_AT_decl_line : 2
3417 <5d> DW_AT_type : <0x6e>
3419 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3420 <76> DW_AT_byte_size : 4
3421 <77> DW_AT_encoding : 5 (signed)
3423 imports the wrong die ( 0x75 instead of 0x58 ).
3424 This case will be ignored until the gcc bug is fixed. */
3428 /* FIXME: dwarf2_name (die); for the local name after import. */
3430 /* Figure out where the statement is being imported to. */
3431 import_prefix
= determine_prefix (die
, cu
);
3433 /* Figure out what the scope of the imported die is and prepend it
3434 to the name of the imported die. */
3435 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3437 if (strlen (imported_name_prefix
) > 0)
3439 canonical_name
= alloca (strlen (imported_name_prefix
) + 2 + strlen (imported_name
) + 1);
3440 strcpy (canonical_name
, imported_name_prefix
);
3441 strcat (canonical_name
, "::");
3442 strcat (canonical_name
, imported_name
);
3446 canonical_name
= alloca (strlen (imported_name
) + 1);
3447 strcpy (canonical_name
, imported_name
);
3450 using_directives
= cp_add_using (import_prefix
,canonical_name
, using_directives
);
3454 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3456 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3460 free_cu_line_header (void *arg
)
3462 struct dwarf2_cu
*cu
= arg
;
3464 free_line_header (cu
->line_header
);
3465 cu
->line_header
= NULL
;
3469 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3471 struct objfile
*objfile
= cu
->objfile
;
3472 struct comp_unit_head
*cu_header
= &cu
->header
;
3473 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3474 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3475 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3476 struct attribute
*attr
;
3478 char *comp_dir
= NULL
;
3479 struct die_info
*child_die
;
3480 bfd
*abfd
= objfile
->obfd
;
3481 struct line_header
*line_header
= 0;
3484 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3486 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3488 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3489 from finish_block. */
3490 if (lowpc
== ((CORE_ADDR
) -1))
3495 /* Find the filename. Do not use dwarf2_name here, since the filename
3496 is not a source language identifier. */
3497 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3500 name
= DW_STRING (attr
);
3503 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3505 comp_dir
= DW_STRING (attr
);
3506 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3508 comp_dir
= ldirname (name
);
3509 if (comp_dir
!= NULL
)
3510 make_cleanup (xfree
, comp_dir
);
3512 if (comp_dir
!= NULL
)
3514 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3515 directory, get rid of it. */
3516 char *cp
= strchr (comp_dir
, ':');
3518 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3525 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3528 set_cu_language (DW_UNSND (attr
), cu
);
3531 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3533 cu
->producer
= DW_STRING (attr
);
3535 /* We assume that we're processing GCC output. */
3536 processing_gcc_compilation
= 2;
3538 processing_has_namespace_info
= 0;
3540 start_symtab (name
, comp_dir
, lowpc
);
3541 record_debugformat ("DWARF 2");
3542 record_producer (cu
->producer
);
3544 initialize_cu_func_list (cu
);
3546 /* Decode line number information if present. We do this before
3547 processing child DIEs, so that the line header table is available
3548 for DW_AT_decl_file. */
3549 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3552 unsigned int line_offset
= DW_UNSND (attr
);
3553 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3556 cu
->line_header
= line_header
;
3557 make_cleanup (free_cu_line_header
, cu
);
3558 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3562 /* Process all dies in compilation unit. */
3563 if (die
->child
!= NULL
)
3565 child_die
= die
->child
;
3566 while (child_die
&& child_die
->tag
)
3568 process_die (child_die
, cu
);
3569 child_die
= sibling_die (child_die
);
3573 /* Decode macro information, if present. Dwarf 2 macro information
3574 refers to information in the line number info statement program
3575 header, so we can only read it if we've read the header
3577 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3578 if (attr
&& line_header
)
3580 unsigned int macro_offset
= DW_UNSND (attr
);
3581 dwarf_decode_macros (line_header
, macro_offset
,
3582 comp_dir
, abfd
, cu
);
3584 do_cleanups (back_to
);
3587 /* For TUs we want to skip the first top level sibling if it's not the
3588 actual type being defined by this TU. In this case the first top
3589 level sibling is there to provide context only. */
3592 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3594 struct objfile
*objfile
= cu
->objfile
;
3595 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3597 struct attribute
*attr
;
3599 char *comp_dir
= NULL
;
3600 struct die_info
*child_die
;
3601 bfd
*abfd
= objfile
->obfd
;
3602 struct line_header
*line_header
= 0;
3604 /* start_symtab needs a low pc, but we don't really have one.
3605 Do what read_file_scope would do in the absence of such info. */
3606 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3608 /* Find the filename. Do not use dwarf2_name here, since the filename
3609 is not a source language identifier. */
3610 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3612 name
= DW_STRING (attr
);
3614 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3616 comp_dir
= DW_STRING (attr
);
3617 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3619 comp_dir
= ldirname (name
);
3620 if (comp_dir
!= NULL
)
3621 make_cleanup (xfree
, comp_dir
);
3627 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3629 set_cu_language (DW_UNSND (attr
), cu
);
3631 /* This isn't technically needed today. It is done for symmetry
3632 with read_file_scope. */
3633 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3635 cu
->producer
= DW_STRING (attr
);
3637 /* We assume that we're processing GCC output. */
3638 processing_gcc_compilation
= 2;
3640 processing_has_namespace_info
= 0;
3642 start_symtab (name
, comp_dir
, lowpc
);
3643 record_debugformat ("DWARF 2");
3644 record_producer (cu
->producer
);
3646 /* Process the dies in the type unit. */
3647 if (die
->child
== NULL
)
3649 dump_die_for_error (die
);
3650 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3651 bfd_get_filename (abfd
));
3654 child_die
= die
->child
;
3656 while (child_die
&& child_die
->tag
)
3658 process_die (child_die
, cu
);
3660 child_die
= sibling_die (child_die
);
3663 do_cleanups (back_to
);
3667 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3668 struct dwarf2_cu
*cu
)
3670 struct function_range
*thisfn
;
3672 thisfn
= (struct function_range
*)
3673 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3674 thisfn
->name
= name
;
3675 thisfn
->lowpc
= lowpc
;
3676 thisfn
->highpc
= highpc
;
3677 thisfn
->seen_line
= 0;
3678 thisfn
->next
= NULL
;
3680 if (cu
->last_fn
== NULL
)
3681 cu
->first_fn
= thisfn
;
3683 cu
->last_fn
->next
= thisfn
;
3685 cu
->last_fn
= thisfn
;
3688 /* qsort helper for inherit_abstract_dies. */
3691 unsigned_int_compar (const void *ap
, const void *bp
)
3693 unsigned int a
= *(unsigned int *) ap
;
3694 unsigned int b
= *(unsigned int *) bp
;
3696 return (a
> b
) - (b
> a
);
3699 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3700 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3701 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3704 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3706 struct die_info
*child_die
;
3707 unsigned die_children_count
;
3708 /* CU offsets which were referenced by children of the current DIE. */
3710 unsigned *offsets_end
, *offsetp
;
3711 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3712 struct die_info
*origin_die
;
3713 /* Iterator of the ORIGIN_DIE children. */
3714 struct die_info
*origin_child_die
;
3715 struct cleanup
*cleanups
;
3716 struct attribute
*attr
;
3718 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3722 origin_die
= follow_die_ref (die
, attr
, &cu
);
3723 if (die
->tag
!= origin_die
->tag
3724 && !(die
->tag
== DW_TAG_inlined_subroutine
3725 && origin_die
->tag
== DW_TAG_subprogram
))
3726 complaint (&symfile_complaints
,
3727 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3728 die
->offset
, origin_die
->offset
);
3730 child_die
= die
->child
;
3731 die_children_count
= 0;
3732 while (child_die
&& child_die
->tag
)
3734 child_die
= sibling_die (child_die
);
3735 die_children_count
++;
3737 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3738 cleanups
= make_cleanup (xfree
, offsets
);
3740 offsets_end
= offsets
;
3741 child_die
= die
->child
;
3742 while (child_die
&& child_die
->tag
)
3744 /* For each CHILD_DIE, find the corresponding child of
3745 ORIGIN_DIE. If there is more than one layer of
3746 DW_AT_abstract_origin, follow them all; there shouldn't be,
3747 but GCC versions at least through 4.4 generate this (GCC PR
3749 struct die_info
*child_origin_die
= child_die
;
3752 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3755 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3758 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3759 counterpart may exist. */
3760 if (child_origin_die
!= child_die
)
3762 if (child_die
->tag
!= child_origin_die
->tag
3763 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3764 && child_origin_die
->tag
== DW_TAG_subprogram
))
3765 complaint (&symfile_complaints
,
3766 _("Child DIE 0x%x and its abstract origin 0x%x have "
3767 "different tags"), child_die
->offset
,
3768 child_origin_die
->offset
);
3769 if (child_origin_die
->parent
!= origin_die
)
3770 complaint (&symfile_complaints
,
3771 _("Child DIE 0x%x and its abstract origin 0x%x have "
3772 "different parents"), child_die
->offset
,
3773 child_origin_die
->offset
);
3775 *offsets_end
++ = child_origin_die
->offset
;
3777 child_die
= sibling_die (child_die
);
3779 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3780 unsigned_int_compar
);
3781 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3782 if (offsetp
[-1] == *offsetp
)
3783 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3784 "to DIE 0x%x as their abstract origin"),
3785 die
->offset
, *offsetp
);
3788 origin_child_die
= origin_die
->child
;
3789 while (origin_child_die
&& origin_child_die
->tag
)
3791 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3792 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3794 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3796 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3797 process_die (origin_child_die
, cu
);
3799 origin_child_die
= sibling_die (origin_child_die
);
3802 do_cleanups (cleanups
);
3806 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3808 struct objfile
*objfile
= cu
->objfile
;
3809 struct context_stack
*new;
3812 struct die_info
*child_die
;
3813 struct attribute
*attr
, *call_line
, *call_file
;
3816 struct block
*block
;
3817 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3821 /* If we do not have call site information, we can't show the
3822 caller of this inlined function. That's too confusing, so
3823 only use the scope for local variables. */
3824 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3825 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3826 if (call_line
== NULL
|| call_file
== NULL
)
3828 read_lexical_block_scope (die
, cu
);
3833 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3835 name
= dwarf2_linkage_name (die
, cu
);
3837 /* Ignore functions with missing or empty names and functions with
3838 missing or invalid low and high pc attributes. */
3839 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3845 /* Record the function range for dwarf_decode_lines. */
3846 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3848 new = push_context (0, lowpc
);
3849 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3851 /* If there is a location expression for DW_AT_frame_base, record
3853 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3855 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3856 expression is being recorded directly in the function's symbol
3857 and not in a separate frame-base object. I guess this hack is
3858 to avoid adding some sort of frame-base adjunct/annex to the
3859 function's symbol :-(. The problem with doing this is that it
3860 results in a function symbol with a location expression that
3861 has nothing to do with the location of the function, ouch! The
3862 relationship should be: a function's symbol has-a frame base; a
3863 frame-base has-a location expression. */
3864 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3866 cu
->list_in_scope
= &local_symbols
;
3868 if (die
->child
!= NULL
)
3870 child_die
= die
->child
;
3871 while (child_die
&& child_die
->tag
)
3873 process_die (child_die
, cu
);
3874 child_die
= sibling_die (child_die
);
3878 inherit_abstract_dies (die
, cu
);
3880 new = pop_context ();
3881 /* Make a block for the local symbols within. */
3882 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3883 lowpc
, highpc
, objfile
);
3885 /* For C++, set the block's scope. */
3886 if (cu
->language
== language_cplus
)
3887 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3888 determine_prefix (die
, cu
),
3889 processing_has_namespace_info
);
3891 /* If we have address ranges, record them. */
3892 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3894 /* In C++, we can have functions nested inside functions (e.g., when
3895 a function declares a class that has methods). This means that
3896 when we finish processing a function scope, we may need to go
3897 back to building a containing block's symbol lists. */
3898 local_symbols
= new->locals
;
3899 param_symbols
= new->params
;
3900 using_directives
= new->using_directives
;
3902 /* If we've finished processing a top-level function, subsequent
3903 symbols go in the file symbol list. */
3904 if (outermost_context_p ())
3905 cu
->list_in_scope
= &file_symbols
;
3908 /* Process all the DIES contained within a lexical block scope. Start
3909 a new scope, process the dies, and then close the scope. */
3912 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3914 struct objfile
*objfile
= cu
->objfile
;
3915 struct context_stack
*new;
3916 CORE_ADDR lowpc
, highpc
;
3917 struct die_info
*child_die
;
3920 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3922 /* Ignore blocks with missing or invalid low and high pc attributes. */
3923 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3924 as multiple lexical blocks? Handling children in a sane way would
3925 be nasty. Might be easier to properly extend generic blocks to
3927 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3932 push_context (0, lowpc
);
3933 if (die
->child
!= NULL
)
3935 child_die
= die
->child
;
3936 while (child_die
&& child_die
->tag
)
3938 process_die (child_die
, cu
);
3939 child_die
= sibling_die (child_die
);
3942 new = pop_context ();
3944 if (local_symbols
!= NULL
)
3947 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3950 /* Note that recording ranges after traversing children, as we
3951 do here, means that recording a parent's ranges entails
3952 walking across all its children's ranges as they appear in
3953 the address map, which is quadratic behavior.
3955 It would be nicer to record the parent's ranges before
3956 traversing its children, simply overriding whatever you find
3957 there. But since we don't even decide whether to create a
3958 block until after we've traversed its children, that's hard
3960 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3962 local_symbols
= new->locals
;
3963 using_directives
= new->using_directives
;
3966 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3967 Return 1 if the attributes are present and valid, otherwise, return 0.
3968 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3971 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3972 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
3973 struct partial_symtab
*ranges_pst
)
3975 struct objfile
*objfile
= cu
->objfile
;
3976 struct comp_unit_head
*cu_header
= &cu
->header
;
3977 bfd
*obfd
= objfile
->obfd
;
3978 unsigned int addr_size
= cu_header
->addr_size
;
3979 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3980 /* Base address selection entry. */
3991 found_base
= cu
->base_known
;
3992 base
= cu
->base_address
;
3994 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
3996 complaint (&symfile_complaints
,
3997 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4001 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4003 /* Read in the largest possible address. */
4004 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4005 if ((marker
& mask
) == mask
)
4007 /* If we found the largest possible address, then
4008 read the base address. */
4009 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4010 buffer
+= 2 * addr_size
;
4011 offset
+= 2 * addr_size
;
4017 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4021 CORE_ADDR range_beginning
, range_end
;
4023 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4024 buffer
+= addr_size
;
4025 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4026 buffer
+= addr_size
;
4027 offset
+= 2 * addr_size
;
4029 /* An end of list marker is a pair of zero addresses. */
4030 if (range_beginning
== 0 && range_end
== 0)
4031 /* Found the end of list entry. */
4034 /* Each base address selection entry is a pair of 2 values.
4035 The first is the largest possible address, the second is
4036 the base address. Check for a base address here. */
4037 if ((range_beginning
& mask
) == mask
)
4039 /* If we found the largest possible address, then
4040 read the base address. */
4041 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4048 /* We have no valid base address for the ranges
4050 complaint (&symfile_complaints
,
4051 _("Invalid .debug_ranges data (no base address)"));
4055 range_beginning
+= base
;
4058 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4059 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4060 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4063 /* FIXME: This is recording everything as a low-high
4064 segment of consecutive addresses. We should have a
4065 data structure for discontiguous block ranges
4069 low
= range_beginning
;
4075 if (range_beginning
< low
)
4076 low
= range_beginning
;
4077 if (range_end
> high
)
4083 /* If the first entry is an end-of-list marker, the range
4084 describes an empty scope, i.e. no instructions. */
4090 *high_return
= high
;
4094 /* Get low and high pc attributes from a die. Return 1 if the attributes
4095 are present and valid, otherwise, return 0. Return -1 if the range is
4096 discontinuous, i.e. derived from DW_AT_ranges information. */
4098 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4099 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4100 struct partial_symtab
*pst
)
4102 struct attribute
*attr
;
4107 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4110 high
= DW_ADDR (attr
);
4111 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4113 low
= DW_ADDR (attr
);
4115 /* Found high w/o low attribute. */
4118 /* Found consecutive range of addresses. */
4123 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4126 /* Value of the DW_AT_ranges attribute is the offset in the
4127 .debug_ranges section. */
4128 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4130 /* Found discontinuous range of addresses. */
4138 /* When using the GNU linker, .gnu.linkonce. sections are used to
4139 eliminate duplicate copies of functions and vtables and such.
4140 The linker will arbitrarily choose one and discard the others.
4141 The AT_*_pc values for such functions refer to local labels in
4142 these sections. If the section from that file was discarded, the
4143 labels are not in the output, so the relocs get a value of 0.
4144 If this is a discarded function, mark the pc bounds as invalid,
4145 so that GDB will ignore it. */
4146 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4154 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4155 its low and high PC addresses. Do nothing if these addresses could not
4156 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4157 and HIGHPC to the high address if greater than HIGHPC. */
4160 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4161 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4162 struct dwarf2_cu
*cu
)
4164 CORE_ADDR low
, high
;
4165 struct die_info
*child
= die
->child
;
4167 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4169 *lowpc
= min (*lowpc
, low
);
4170 *highpc
= max (*highpc
, high
);
4173 /* If the language does not allow nested subprograms (either inside
4174 subprograms or lexical blocks), we're done. */
4175 if (cu
->language
!= language_ada
)
4178 /* Check all the children of the given DIE. If it contains nested
4179 subprograms, then check their pc bounds. Likewise, we need to
4180 check lexical blocks as well, as they may also contain subprogram
4182 while (child
&& child
->tag
)
4184 if (child
->tag
== DW_TAG_subprogram
4185 || child
->tag
== DW_TAG_lexical_block
)
4186 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4187 child
= sibling_die (child
);
4191 /* Get the low and high pc's represented by the scope DIE, and store
4192 them in *LOWPC and *HIGHPC. If the correct values can't be
4193 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4196 get_scope_pc_bounds (struct die_info
*die
,
4197 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4198 struct dwarf2_cu
*cu
)
4200 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4201 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4202 CORE_ADDR current_low
, current_high
;
4204 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4206 best_low
= current_low
;
4207 best_high
= current_high
;
4211 struct die_info
*child
= die
->child
;
4213 while (child
&& child
->tag
)
4215 switch (child
->tag
) {
4216 case DW_TAG_subprogram
:
4217 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4219 case DW_TAG_namespace
:
4220 /* FIXME: carlton/2004-01-16: Should we do this for
4221 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4222 that current GCC's always emit the DIEs corresponding
4223 to definitions of methods of classes as children of a
4224 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4225 the DIEs giving the declarations, which could be
4226 anywhere). But I don't see any reason why the
4227 standards says that they have to be there. */
4228 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4230 if (current_low
!= ((CORE_ADDR
) -1))
4232 best_low
= min (best_low
, current_low
);
4233 best_high
= max (best_high
, current_high
);
4241 child
= sibling_die (child
);
4246 *highpc
= best_high
;
4249 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4252 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4253 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4255 struct attribute
*attr
;
4257 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4260 CORE_ADDR high
= DW_ADDR (attr
);
4261 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4264 CORE_ADDR low
= DW_ADDR (attr
);
4265 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4269 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4272 bfd
*obfd
= cu
->objfile
->obfd
;
4274 /* The value of the DW_AT_ranges attribute is the offset of the
4275 address range list in the .debug_ranges section. */
4276 unsigned long offset
= DW_UNSND (attr
);
4277 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4279 /* For some target architectures, but not others, the
4280 read_address function sign-extends the addresses it returns.
4281 To recognize base address selection entries, we need a
4283 unsigned int addr_size
= cu
->header
.addr_size
;
4284 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4286 /* The base address, to which the next pair is relative. Note
4287 that this 'base' is a DWARF concept: most entries in a range
4288 list are relative, to reduce the number of relocs against the
4289 debugging information. This is separate from this function's
4290 'baseaddr' argument, which GDB uses to relocate debugging
4291 information from a shared library based on the address at
4292 which the library was loaded. */
4293 CORE_ADDR base
= cu
->base_address
;
4294 int base_known
= cu
->base_known
;
4296 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4298 complaint (&symfile_complaints
,
4299 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4306 unsigned int bytes_read
;
4307 CORE_ADDR start
, end
;
4309 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4310 buffer
+= bytes_read
;
4311 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4312 buffer
+= bytes_read
;
4314 /* Did we find the end of the range list? */
4315 if (start
== 0 && end
== 0)
4318 /* Did we find a base address selection entry? */
4319 else if ((start
& base_select_mask
) == base_select_mask
)
4325 /* We found an ordinary address range. */
4330 complaint (&symfile_complaints
,
4331 _("Invalid .debug_ranges data (no base address)"));
4335 record_block_range (block
,
4336 baseaddr
+ base
+ start
,
4337 baseaddr
+ base
+ end
- 1);
4343 /* Add an aggregate field to the field list. */
4346 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4347 struct dwarf2_cu
*cu
)
4349 struct objfile
*objfile
= cu
->objfile
;
4350 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4351 struct nextfield
*new_field
;
4352 struct attribute
*attr
;
4354 char *fieldname
= "";
4356 /* Allocate a new field list entry and link it in. */
4357 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4358 make_cleanup (xfree
, new_field
);
4359 memset (new_field
, 0, sizeof (struct nextfield
));
4361 if (die
->tag
== DW_TAG_inheritance
)
4363 new_field
->next
= fip
->baseclasses
;
4364 fip
->baseclasses
= new_field
;
4368 new_field
->next
= fip
->fields
;
4369 fip
->fields
= new_field
;
4373 /* Handle accessibility and virtuality of field.
4374 The default accessibility for members is public, the default
4375 accessibility for inheritance is private. */
4376 if (die
->tag
!= DW_TAG_inheritance
)
4377 new_field
->accessibility
= DW_ACCESS_public
;
4379 new_field
->accessibility
= DW_ACCESS_private
;
4380 new_field
->virtuality
= DW_VIRTUALITY_none
;
4382 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4384 new_field
->accessibility
= DW_UNSND (attr
);
4385 if (new_field
->accessibility
!= DW_ACCESS_public
)
4386 fip
->non_public_fields
= 1;
4387 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4389 new_field
->virtuality
= DW_UNSND (attr
);
4391 fp
= &new_field
->field
;
4393 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4395 /* Data member other than a C++ static data member. */
4397 /* Get type of field. */
4398 fp
->type
= die_type (die
, cu
);
4400 SET_FIELD_BITPOS (*fp
, 0);
4402 /* Get bit size of field (zero if none). */
4403 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4406 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4410 FIELD_BITSIZE (*fp
) = 0;
4413 /* Get bit offset of field. */
4414 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4417 int byte_offset
= 0;
4419 if (attr_form_is_section_offset (attr
))
4420 dwarf2_complex_location_expr_complaint ();
4421 else if (attr_form_is_constant (attr
))
4422 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4423 else if (attr_form_is_block (attr
))
4424 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4426 dwarf2_complex_location_expr_complaint ();
4428 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4430 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4433 if (gdbarch_bits_big_endian (gdbarch
))
4435 /* For big endian bits, the DW_AT_bit_offset gives the
4436 additional bit offset from the MSB of the containing
4437 anonymous object to the MSB of the field. We don't
4438 have to do anything special since we don't need to
4439 know the size of the anonymous object. */
4440 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4444 /* For little endian bits, compute the bit offset to the
4445 MSB of the anonymous object, subtract off the number of
4446 bits from the MSB of the field to the MSB of the
4447 object, and then subtract off the number of bits of
4448 the field itself. The result is the bit offset of
4449 the LSB of the field. */
4451 int bit_offset
= DW_UNSND (attr
);
4453 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4456 /* The size of the anonymous object containing
4457 the bit field is explicit, so use the
4458 indicated size (in bytes). */
4459 anonymous_size
= DW_UNSND (attr
);
4463 /* The size of the anonymous object containing
4464 the bit field must be inferred from the type
4465 attribute of the data member containing the
4467 anonymous_size
= TYPE_LENGTH (fp
->type
);
4469 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4470 - bit_offset
- FIELD_BITSIZE (*fp
);
4474 /* Get name of field. */
4475 fieldname
= dwarf2_name (die
, cu
);
4476 if (fieldname
== NULL
)
4479 /* The name is already allocated along with this objfile, so we don't
4480 need to duplicate it for the type. */
4481 fp
->name
= fieldname
;
4483 /* Change accessibility for artificial fields (e.g. virtual table
4484 pointer or virtual base class pointer) to private. */
4485 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4487 FIELD_ARTIFICIAL (*fp
) = 1;
4488 new_field
->accessibility
= DW_ACCESS_private
;
4489 fip
->non_public_fields
= 1;
4492 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4494 /* C++ static member. */
4496 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4497 is a declaration, but all versions of G++ as of this writing
4498 (so through at least 3.2.1) incorrectly generate
4499 DW_TAG_variable tags. */
4503 /* Get name of field. */
4504 fieldname
= dwarf2_name (die
, cu
);
4505 if (fieldname
== NULL
)
4508 /* Get physical name. */
4509 physname
= dwarf2_linkage_name (die
, cu
);
4511 /* The name is already allocated along with this objfile, so we don't
4512 need to duplicate it for the type. */
4513 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4514 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4515 FIELD_NAME (*fp
) = fieldname
;
4517 else if (die
->tag
== DW_TAG_inheritance
)
4519 /* C++ base class field. */
4520 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4523 int byte_offset
= 0;
4525 if (attr_form_is_section_offset (attr
))
4526 dwarf2_complex_location_expr_complaint ();
4527 else if (attr_form_is_constant (attr
))
4528 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4529 else if (attr_form_is_block (attr
))
4530 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4532 dwarf2_complex_location_expr_complaint ();
4534 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4536 FIELD_BITSIZE (*fp
) = 0;
4537 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4538 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4539 fip
->nbaseclasses
++;
4543 /* Create the vector of fields, and attach it to the type. */
4546 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4547 struct dwarf2_cu
*cu
)
4549 int nfields
= fip
->nfields
;
4551 /* Record the field count, allocate space for the array of fields,
4552 and create blank accessibility bitfields if necessary. */
4553 TYPE_NFIELDS (type
) = nfields
;
4554 TYPE_FIELDS (type
) = (struct field
*)
4555 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4556 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4558 if (fip
->non_public_fields
)
4560 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4562 TYPE_FIELD_PRIVATE_BITS (type
) =
4563 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4564 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4566 TYPE_FIELD_PROTECTED_BITS (type
) =
4567 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4568 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4570 TYPE_FIELD_IGNORE_BITS (type
) =
4571 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4572 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4575 /* If the type has baseclasses, allocate and clear a bit vector for
4576 TYPE_FIELD_VIRTUAL_BITS. */
4577 if (fip
->nbaseclasses
)
4579 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4580 unsigned char *pointer
;
4582 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4583 pointer
= TYPE_ALLOC (type
, num_bytes
);
4584 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4585 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4586 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4589 /* Copy the saved-up fields into the field vector. Start from the head
4590 of the list, adding to the tail of the field array, so that they end
4591 up in the same order in the array in which they were added to the list. */
4592 while (nfields
-- > 0)
4594 struct nextfield
*fieldp
;
4598 fieldp
= fip
->fields
;
4599 fip
->fields
= fieldp
->next
;
4603 fieldp
= fip
->baseclasses
;
4604 fip
->baseclasses
= fieldp
->next
;
4607 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4608 switch (fieldp
->accessibility
)
4610 case DW_ACCESS_private
:
4611 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4614 case DW_ACCESS_protected
:
4615 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4618 case DW_ACCESS_public
:
4622 /* Unknown accessibility. Complain and treat it as public. */
4624 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4625 fieldp
->accessibility
);
4629 if (nfields
< fip
->nbaseclasses
)
4631 switch (fieldp
->virtuality
)
4633 case DW_VIRTUALITY_virtual
:
4634 case DW_VIRTUALITY_pure_virtual
:
4635 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4642 /* Add a member function to the proper fieldlist. */
4645 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4646 struct type
*type
, struct dwarf2_cu
*cu
)
4648 struct objfile
*objfile
= cu
->objfile
;
4649 struct attribute
*attr
;
4650 struct fnfieldlist
*flp
;
4652 struct fn_field
*fnp
;
4655 struct nextfnfield
*new_fnfield
;
4656 struct type
*this_type
;
4658 /* Get name of member function. */
4659 fieldname
= dwarf2_name (die
, cu
);
4660 if (fieldname
== NULL
)
4663 /* Get the mangled name. */
4664 physname
= dwarf2_linkage_name (die
, cu
);
4666 /* Look up member function name in fieldlist. */
4667 for (i
= 0; i
< fip
->nfnfields
; i
++)
4669 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4673 /* Create new list element if necessary. */
4674 if (i
< fip
->nfnfields
)
4675 flp
= &fip
->fnfieldlists
[i
];
4678 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4680 fip
->fnfieldlists
= (struct fnfieldlist
*)
4681 xrealloc (fip
->fnfieldlists
,
4682 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4683 * sizeof (struct fnfieldlist
));
4684 if (fip
->nfnfields
== 0)
4685 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4687 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4688 flp
->name
= fieldname
;
4694 /* Create a new member function field and chain it to the field list
4696 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4697 make_cleanup (xfree
, new_fnfield
);
4698 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4699 new_fnfield
->next
= flp
->head
;
4700 flp
->head
= new_fnfield
;
4703 /* Fill in the member function field info. */
4704 fnp
= &new_fnfield
->fnfield
;
4705 /* The name is already allocated along with this objfile, so we don't
4706 need to duplicate it for the type. */
4707 fnp
->physname
= physname
? physname
: "";
4708 fnp
->type
= alloc_type (objfile
);
4709 this_type
= read_type_die (die
, cu
);
4710 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4712 int nparams
= TYPE_NFIELDS (this_type
);
4714 /* TYPE is the domain of this method, and THIS_TYPE is the type
4715 of the method itself (TYPE_CODE_METHOD). */
4716 smash_to_method_type (fnp
->type
, type
,
4717 TYPE_TARGET_TYPE (this_type
),
4718 TYPE_FIELDS (this_type
),
4719 TYPE_NFIELDS (this_type
),
4720 TYPE_VARARGS (this_type
));
4722 /* Handle static member functions.
4723 Dwarf2 has no clean way to discern C++ static and non-static
4724 member functions. G++ helps GDB by marking the first
4725 parameter for non-static member functions (which is the
4726 this pointer) as artificial. We obtain this information
4727 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4728 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4729 fnp
->voffset
= VOFFSET_STATIC
;
4732 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4735 /* Get fcontext from DW_AT_containing_type if present. */
4736 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4737 fnp
->fcontext
= die_containing_type (die
, cu
);
4739 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4740 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4742 /* Get accessibility. */
4743 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4746 switch (DW_UNSND (attr
))
4748 case DW_ACCESS_private
:
4749 fnp
->is_private
= 1;
4751 case DW_ACCESS_protected
:
4752 fnp
->is_protected
= 1;
4757 /* Check for artificial methods. */
4758 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4759 if (attr
&& DW_UNSND (attr
) != 0)
4760 fnp
->is_artificial
= 1;
4762 /* Get index in virtual function table if it is a virtual member
4763 function. For GCC, this is an offset in the appropriate
4764 virtual table, as specified by DW_AT_containing_type. For
4765 everyone else, it is an expression to be evaluated relative
4766 to the object address. */
4768 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4769 if (attr
&& fnp
->fcontext
)
4771 /* Support the .debug_loc offsets */
4772 if (attr_form_is_block (attr
))
4774 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4776 else if (attr_form_is_section_offset (attr
))
4778 dwarf2_complex_location_expr_complaint ();
4782 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4788 /* We only support trivial expressions here. This hack will work
4789 for v3 classes, which always start with the vtable pointer. */
4790 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0
4791 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref
)
4793 struct dwarf_block blk
;
4794 blk
.size
= DW_BLOCK (attr
)->size
- 1;
4795 blk
.data
= DW_BLOCK (attr
)->data
+ 1;
4796 fnp
->voffset
= decode_locdesc (&blk
, cu
);
4797 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4798 dwarf2_complex_location_expr_complaint ();
4800 fnp
->voffset
/= cu
->header
.addr_size
;
4802 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4805 dwarf2_complex_location_expr_complaint ();
4809 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4810 if (attr
&& DW_UNSND (attr
))
4812 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4813 complaint (&symfile_complaints
,
4814 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4815 fieldname
, die
->offset
);
4816 TYPE_CPLUS_DYNAMIC (type
) = 1;
4821 /* Create the vector of member function fields, and attach it to the type. */
4824 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4825 struct dwarf2_cu
*cu
)
4827 struct fnfieldlist
*flp
;
4828 int total_length
= 0;
4831 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4832 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4833 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4835 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4837 struct nextfnfield
*nfp
= flp
->head
;
4838 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4841 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4842 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4843 fn_flp
->fn_fields
= (struct fn_field
*)
4844 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4845 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4846 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4848 total_length
+= flp
->length
;
4851 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4852 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4855 /* Returns non-zero if NAME is the name of a vtable member in CU's
4856 language, zero otherwise. */
4858 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4860 static const char vptr
[] = "_vptr";
4861 static const char vtable
[] = "vtable";
4863 /* Look for the C++ and Java forms of the vtable. */
4864 if ((cu
->language
== language_java
4865 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4866 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4867 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4873 /* GCC outputs unnamed structures that are really pointers to member
4874 functions, with the ABI-specified layout. If DIE (from CU) describes
4875 such a structure, set its type, and return nonzero. Otherwise return
4878 GCC shouldn't do this; it should just output pointer to member DIEs.
4879 This is GCC PR debug/28767. */
4881 static struct type
*
4882 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
4884 struct objfile
*objfile
= cu
->objfile
;
4886 struct die_info
*pfn_die
, *delta_die
;
4887 struct attribute
*pfn_name
, *delta_name
;
4888 struct type
*pfn_type
, *domain_type
;
4890 /* Check for a structure with no name and two children. */
4891 if (die
->tag
!= DW_TAG_structure_type
4892 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
4893 || die
->child
== NULL
4894 || die
->child
->sibling
== NULL
4895 || (die
->child
->sibling
->sibling
!= NULL
4896 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
4899 /* Check for __pfn and __delta members. */
4900 pfn_die
= die
->child
;
4901 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
4902 if (pfn_die
->tag
!= DW_TAG_member
4904 || DW_STRING (pfn_name
) == NULL
4905 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
4908 delta_die
= pfn_die
->sibling
;
4909 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
4910 if (delta_die
->tag
!= DW_TAG_member
4911 || delta_name
== NULL
4912 || DW_STRING (delta_name
) == NULL
4913 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
4916 /* Find the type of the method. */
4917 pfn_type
= die_type (pfn_die
, cu
);
4918 if (pfn_type
== NULL
4919 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
4920 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
4923 /* Look for the "this" argument. */
4924 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
4925 if (TYPE_NFIELDS (pfn_type
) == 0
4926 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
4929 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
4930 type
= alloc_type (objfile
);
4931 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
4932 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
4933 TYPE_VARARGS (pfn_type
));
4934 type
= lookup_methodptr_type (type
);
4935 return set_die_type (die
, type
, cu
);
4938 /* Called when we find the DIE that starts a structure or union scope
4939 (definition) to process all dies that define the members of the
4942 NOTE: we need to call struct_type regardless of whether or not the
4943 DIE has an at_name attribute, since it might be an anonymous
4944 structure or union. This gets the type entered into our set of
4947 However, if the structure is incomplete (an opaque struct/union)
4948 then suppress creating a symbol table entry for it since gdb only
4949 wants to find the one with the complete definition. Note that if
4950 it is complete, we just call new_symbol, which does it's own
4951 checking about whether the struct/union is anonymous or not (and
4952 suppresses creating a symbol table entry itself). */
4954 static struct type
*
4955 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4957 struct objfile
*objfile
= cu
->objfile
;
4959 struct attribute
*attr
;
4961 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4963 type
= quirk_gcc_member_function_pointer (die
, cu
);
4967 /* If the definition of this type lives in .debug_types, read that type.
4968 Don't follow DW_AT_specification though, that will take us back up
4969 the chain and we want to go down. */
4970 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
4973 struct dwarf2_cu
*type_cu
= cu
;
4974 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
4975 /* We could just recurse on read_structure_type, but we need to call
4976 get_die_type to ensure only one type for this DIE is created.
4977 This is important, for example, because for c++ classes we need
4978 TYPE_NAME set which is only done by new_symbol. Blech. */
4979 type
= read_type_die (type_die
, type_cu
);
4980 return set_die_type (die
, type
, cu
);
4983 type
= alloc_type (objfile
);
4984 INIT_CPLUS_SPECIFIC (type
);
4986 name
= dwarf2_name (die
, cu
);
4989 if (cu
->language
== language_cplus
4990 || cu
->language
== language_java
)
4992 const char *new_prefix
= determine_class_name (die
, cu
);
4993 TYPE_TAG_NAME (type
) = (char *) new_prefix
;
4997 /* The name is already allocated along with this objfile, so
4998 we don't need to duplicate it for the type. */
4999 TYPE_TAG_NAME (type
) = name
;
5003 if (die
->tag
== DW_TAG_structure_type
)
5005 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5007 else if (die
->tag
== DW_TAG_union_type
)
5009 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5013 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
5015 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5018 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5021 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5025 TYPE_LENGTH (type
) = 0;
5028 TYPE_STUB_SUPPORTED (type
) = 1;
5029 if (die_is_declaration (die
, cu
))
5030 TYPE_STUB (type
) = 1;
5032 /* We need to add the type field to the die immediately so we don't
5033 infinitely recurse when dealing with pointers to the structure
5034 type within the structure itself. */
5035 set_die_type (die
, type
, cu
);
5037 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5039 struct field_info fi
;
5040 struct die_info
*child_die
;
5042 memset (&fi
, 0, sizeof (struct field_info
));
5044 child_die
= die
->child
;
5046 while (child_die
&& child_die
->tag
)
5048 if (child_die
->tag
== DW_TAG_member
5049 || child_die
->tag
== DW_TAG_variable
)
5051 /* NOTE: carlton/2002-11-05: A C++ static data member
5052 should be a DW_TAG_member that is a declaration, but
5053 all versions of G++ as of this writing (so through at
5054 least 3.2.1) incorrectly generate DW_TAG_variable
5055 tags for them instead. */
5056 dwarf2_add_field (&fi
, child_die
, cu
);
5058 else if (child_die
->tag
== DW_TAG_subprogram
)
5060 /* C++ member function. */
5061 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5063 else if (child_die
->tag
== DW_TAG_inheritance
)
5065 /* C++ base class field. */
5066 dwarf2_add_field (&fi
, child_die
, cu
);
5068 child_die
= sibling_die (child_die
);
5071 /* Attach fields and member functions to the type. */
5073 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5076 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5078 /* Get the type which refers to the base class (possibly this
5079 class itself) which contains the vtable pointer for the current
5080 class from the DW_AT_containing_type attribute. This use of
5081 DW_AT_containing_type is a GNU extension. */
5083 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5085 struct type
*t
= die_containing_type (die
, cu
);
5087 TYPE_VPTR_BASETYPE (type
) = t
;
5092 /* Our own class provides vtbl ptr. */
5093 for (i
= TYPE_NFIELDS (t
) - 1;
5094 i
>= TYPE_N_BASECLASSES (t
);
5097 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5099 if (is_vtable_name (fieldname
, cu
))
5101 TYPE_VPTR_FIELDNO (type
) = i
;
5106 /* Complain if virtual function table field not found. */
5107 if (i
< TYPE_N_BASECLASSES (t
))
5108 complaint (&symfile_complaints
,
5109 _("virtual function table pointer not found when defining class '%s'"),
5110 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5115 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5118 else if (cu
->producer
5119 && strncmp (cu
->producer
,
5120 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5122 /* The IBM XLC compiler does not provide direct indication
5123 of the containing type, but the vtable pointer is
5124 always named __vfp. */
5128 for (i
= TYPE_NFIELDS (type
) - 1;
5129 i
>= TYPE_N_BASECLASSES (type
);
5132 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5134 TYPE_VPTR_FIELDNO (type
) = i
;
5135 TYPE_VPTR_BASETYPE (type
) = type
;
5143 do_cleanups (back_to
);
5148 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5150 struct objfile
*objfile
= cu
->objfile
;
5151 struct die_info
*child_die
= die
->child
;
5152 struct type
*this_type
;
5154 this_type
= get_die_type (die
, cu
);
5155 if (this_type
== NULL
)
5156 this_type
= read_structure_type (die
, cu
);
5158 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5159 snapshots) has been known to create a die giving a declaration
5160 for a class that has, as a child, a die giving a definition for a
5161 nested class. So we have to process our children even if the
5162 current die is a declaration. Normally, of course, a declaration
5163 won't have any children at all. */
5165 while (child_die
!= NULL
&& child_die
->tag
)
5167 if (child_die
->tag
== DW_TAG_member
5168 || child_die
->tag
== DW_TAG_variable
5169 || child_die
->tag
== DW_TAG_inheritance
)
5174 process_die (child_die
, cu
);
5176 child_die
= sibling_die (child_die
);
5179 /* Do not consider external references. According to the DWARF standard,
5180 these DIEs are identified by the fact that they have no byte_size
5181 attribute, and a declaration attribute. */
5182 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5183 || !die_is_declaration (die
, cu
))
5184 new_symbol (die
, this_type
, cu
);
5187 /* Given a DW_AT_enumeration_type die, set its type. We do not
5188 complete the type's fields yet, or create any symbols. */
5190 static struct type
*
5191 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5193 struct objfile
*objfile
= cu
->objfile
;
5195 struct attribute
*attr
;
5198 /* If the definition of this type lives in .debug_types, read that type.
5199 Don't follow DW_AT_specification though, that will take us back up
5200 the chain and we want to go down. */
5201 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5204 struct dwarf2_cu
*type_cu
= cu
;
5205 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5206 type
= read_type_die (type_die
, type_cu
);
5207 return set_die_type (die
, type
, cu
);
5210 type
= alloc_type (objfile
);
5212 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5213 name
= dwarf2_full_name (die
, cu
);
5215 TYPE_TAG_NAME (type
) = (char *) name
;
5217 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5220 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5224 TYPE_LENGTH (type
) = 0;
5227 /* The enumeration DIE can be incomplete. In Ada, any type can be
5228 declared as private in the package spec, and then defined only
5229 inside the package body. Such types are known as Taft Amendment
5230 Types. When another package uses such a type, an incomplete DIE
5231 may be generated by the compiler. */
5232 if (die_is_declaration (die
, cu
))
5233 TYPE_STUB (type
) = 1;
5235 return set_die_type (die
, type
, cu
);
5238 /* Determine the name of the type represented by DIE, which should be
5239 a named C++ or Java compound type. Return the name in question,
5240 allocated on the objfile obstack. */
5243 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
5245 const char *new_prefix
= NULL
;
5247 /* If we don't have namespace debug info, guess the name by trying
5248 to demangle the names of members, just like we did in
5249 guess_structure_name. */
5250 if (!processing_has_namespace_info
)
5252 struct die_info
*child
;
5254 for (child
= die
->child
;
5255 child
!= NULL
&& child
->tag
!= 0;
5256 child
= sibling_die (child
))
5258 if (child
->tag
== DW_TAG_subprogram
)
5261 = language_class_name_from_physname (cu
->language_defn
,
5265 if (phys_prefix
!= NULL
)
5268 = obsavestring (phys_prefix
, strlen (phys_prefix
),
5269 &cu
->objfile
->objfile_obstack
);
5270 xfree (phys_prefix
);
5277 if (new_prefix
== NULL
)
5278 new_prefix
= dwarf2_full_name (die
, cu
);
5283 /* Given a pointer to a die which begins an enumeration, process all
5284 the dies that define the members of the enumeration, and create the
5285 symbol for the enumeration type.
5287 NOTE: We reverse the order of the element list. */
5290 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5292 struct objfile
*objfile
= cu
->objfile
;
5293 struct die_info
*child_die
;
5294 struct field
*fields
;
5297 int unsigned_enum
= 1;
5299 struct type
*this_type
;
5303 this_type
= get_die_type (die
, cu
);
5304 if (this_type
== NULL
)
5305 this_type
= read_enumeration_type (die
, cu
);
5306 if (die
->child
!= NULL
)
5308 child_die
= die
->child
;
5309 while (child_die
&& child_die
->tag
)
5311 if (child_die
->tag
!= DW_TAG_enumerator
)
5313 process_die (child_die
, cu
);
5317 name
= dwarf2_name (child_die
, cu
);
5320 sym
= new_symbol (child_die
, this_type
, cu
);
5321 if (SYMBOL_VALUE (sym
) < 0)
5324 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5326 fields
= (struct field
*)
5328 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5329 * sizeof (struct field
));
5332 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5333 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5334 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5335 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5341 child_die
= sibling_die (child_die
);
5346 TYPE_NFIELDS (this_type
) = num_fields
;
5347 TYPE_FIELDS (this_type
) = (struct field
*)
5348 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5349 memcpy (TYPE_FIELDS (this_type
), fields
,
5350 sizeof (struct field
) * num_fields
);
5354 TYPE_UNSIGNED (this_type
) = 1;
5357 new_symbol (die
, this_type
, cu
);
5360 /* Extract all information from a DW_TAG_array_type DIE and put it in
5361 the DIE's type field. For now, this only handles one dimensional
5364 static struct type
*
5365 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5367 struct objfile
*objfile
= cu
->objfile
;
5368 struct die_info
*child_die
;
5369 struct type
*type
= NULL
;
5370 struct type
*element_type
, *range_type
, *index_type
;
5371 struct type
**range_types
= NULL
;
5372 struct attribute
*attr
;
5374 struct cleanup
*back_to
;
5377 element_type
= die_type (die
, cu
);
5379 /* Irix 6.2 native cc creates array types without children for
5380 arrays with unspecified length. */
5381 if (die
->child
== NULL
)
5383 index_type
= objfile_type (objfile
)->builtin_int
;
5384 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5385 type
= create_array_type (NULL
, element_type
, range_type
);
5386 return set_die_type (die
, type
, cu
);
5389 back_to
= make_cleanup (null_cleanup
, NULL
);
5390 child_die
= die
->child
;
5391 while (child_die
&& child_die
->tag
)
5393 if (child_die
->tag
== DW_TAG_subrange_type
)
5395 struct type
*child_type
= read_type_die (child_die
, cu
);
5396 if (child_type
!= NULL
)
5398 /* The range type was succesfully read. Save it for
5399 the array type creation. */
5400 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5402 range_types
= (struct type
**)
5403 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5404 * sizeof (struct type
*));
5406 make_cleanup (free_current_contents
, &range_types
);
5408 range_types
[ndim
++] = child_type
;
5411 child_die
= sibling_die (child_die
);
5414 /* Dwarf2 dimensions are output from left to right, create the
5415 necessary array types in backwards order. */
5417 type
= element_type
;
5419 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5423 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5428 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5431 /* Understand Dwarf2 support for vector types (like they occur on
5432 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5433 array type. This is not part of the Dwarf2/3 standard yet, but a
5434 custom vendor extension. The main difference between a regular
5435 array and the vector variant is that vectors are passed by value
5437 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5439 make_vector_type (type
);
5441 name
= dwarf2_name (die
, cu
);
5443 TYPE_NAME (type
) = name
;
5445 do_cleanups (back_to
);
5447 /* Install the type in the die. */
5448 return set_die_type (die
, type
, cu
);
5451 static enum dwarf_array_dim_ordering
5452 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5454 struct attribute
*attr
;
5456 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5458 if (attr
) return DW_SND (attr
);
5461 GNU F77 is a special case, as at 08/2004 array type info is the
5462 opposite order to the dwarf2 specification, but data is still
5463 laid out as per normal fortran.
5465 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5469 if (cu
->language
== language_fortran
5470 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5472 return DW_ORD_row_major
;
5475 switch (cu
->language_defn
->la_array_ordering
)
5477 case array_column_major
:
5478 return DW_ORD_col_major
;
5479 case array_row_major
:
5481 return DW_ORD_row_major
;
5485 /* Extract all information from a DW_TAG_set_type DIE and put it in
5486 the DIE's type field. */
5488 static struct type
*
5489 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5491 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5493 return set_die_type (die
, set_type
, cu
);
5496 /* First cut: install each common block member as a global variable. */
5499 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5501 struct die_info
*child_die
;
5502 struct attribute
*attr
;
5504 CORE_ADDR base
= (CORE_ADDR
) 0;
5506 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5509 /* Support the .debug_loc offsets */
5510 if (attr_form_is_block (attr
))
5512 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5514 else if (attr_form_is_section_offset (attr
))
5516 dwarf2_complex_location_expr_complaint ();
5520 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5521 "common block member");
5524 if (die
->child
!= NULL
)
5526 child_die
= die
->child
;
5527 while (child_die
&& child_die
->tag
)
5529 sym
= new_symbol (child_die
, NULL
, cu
);
5530 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5533 CORE_ADDR byte_offset
= 0;
5535 if (attr_form_is_section_offset (attr
))
5536 dwarf2_complex_location_expr_complaint ();
5537 else if (attr_form_is_constant (attr
))
5538 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5539 else if (attr_form_is_block (attr
))
5540 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5542 dwarf2_complex_location_expr_complaint ();
5544 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5545 add_symbol_to_list (sym
, &global_symbols
);
5547 child_die
= sibling_die (child_die
);
5552 /* Create a type for a C++ namespace. */
5554 static struct type
*
5555 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5557 struct objfile
*objfile
= cu
->objfile
;
5558 const char *previous_prefix
, *name
;
5562 /* For extensions, reuse the type of the original namespace. */
5563 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5565 struct die_info
*ext_die
;
5566 struct dwarf2_cu
*ext_cu
= cu
;
5567 ext_die
= dwarf2_extension (die
, &ext_cu
);
5568 type
= read_type_die (ext_die
, ext_cu
);
5569 return set_die_type (die
, type
, cu
);
5572 name
= namespace_name (die
, &is_anonymous
, cu
);
5574 /* Now build the name of the current namespace. */
5576 previous_prefix
= determine_prefix (die
, cu
);
5577 if (previous_prefix
[0] != '\0')
5578 name
= typename_concat (&objfile
->objfile_obstack
,
5579 previous_prefix
, name
, cu
);
5581 /* Create the type. */
5582 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5584 TYPE_NAME (type
) = (char *) name
;
5585 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5587 set_die_type (die
, type
, cu
);
5592 /* Read a C++ namespace. */
5595 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5597 struct objfile
*objfile
= cu
->objfile
;
5601 /* Add a symbol associated to this if we haven't seen the namespace
5602 before. Also, add a using directive if it's an anonymous
5605 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5609 type
= read_type_die (die
, cu
);
5610 new_symbol (die
, type
, cu
);
5612 name
= namespace_name (die
, &is_anonymous
, cu
);
5615 const char *previous_prefix
= determine_prefix (die
, cu
);
5616 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
));
5620 if (die
->child
!= NULL
)
5622 struct die_info
*child_die
= die
->child
;
5624 while (child_die
&& child_die
->tag
)
5626 process_die (child_die
, cu
);
5627 child_die
= sibling_die (child_die
);
5632 /* Read a Fortran module. */
5635 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5637 struct die_info
*child_die
= die
->child
;
5639 /* FIXME: Support the separate Fortran module namespaces. */
5641 while (child_die
&& child_die
->tag
)
5643 process_die (child_die
, cu
);
5644 child_die
= sibling_die (child_die
);
5648 /* Return the name of the namespace represented by DIE. Set
5649 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5653 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5655 struct die_info
*current_die
;
5656 const char *name
= NULL
;
5658 /* Loop through the extensions until we find a name. */
5660 for (current_die
= die
;
5661 current_die
!= NULL
;
5662 current_die
= dwarf2_extension (die
, &cu
))
5664 name
= dwarf2_name (current_die
, cu
);
5669 /* Is it an anonymous namespace? */
5671 *is_anonymous
= (name
== NULL
);
5673 name
= "(anonymous namespace)";
5678 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5679 the user defined type vector. */
5681 static struct type
*
5682 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5684 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5685 struct comp_unit_head
*cu_header
= &cu
->header
;
5687 struct attribute
*attr_byte_size
;
5688 struct attribute
*attr_address_class
;
5689 int byte_size
, addr_class
;
5691 type
= lookup_pointer_type (die_type (die
, cu
));
5693 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5695 byte_size
= DW_UNSND (attr_byte_size
);
5697 byte_size
= cu_header
->addr_size
;
5699 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5700 if (attr_address_class
)
5701 addr_class
= DW_UNSND (attr_address_class
);
5703 addr_class
= DW_ADDR_none
;
5705 /* If the pointer size or address class is different than the
5706 default, create a type variant marked as such and set the
5707 length accordingly. */
5708 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5710 if (gdbarch_address_class_type_flags_p (gdbarch
))
5714 type_flags
= gdbarch_address_class_type_flags
5715 (gdbarch
, byte_size
, addr_class
);
5716 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5718 type
= make_type_with_address_space (type
, type_flags
);
5720 else if (TYPE_LENGTH (type
) != byte_size
)
5722 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5725 /* Should we also complain about unhandled address classes? */
5729 TYPE_LENGTH (type
) = byte_size
;
5730 return set_die_type (die
, type
, cu
);
5733 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5734 the user defined type vector. */
5736 static struct type
*
5737 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5739 struct objfile
*objfile
= cu
->objfile
;
5741 struct type
*to_type
;
5742 struct type
*domain
;
5744 to_type
= die_type (die
, cu
);
5745 domain
= die_containing_type (die
, cu
);
5747 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5748 type
= lookup_methodptr_type (to_type
);
5750 type
= lookup_memberptr_type (to_type
, domain
);
5752 return set_die_type (die
, type
, cu
);
5755 /* Extract all information from a DW_TAG_reference_type DIE and add to
5756 the user defined type vector. */
5758 static struct type
*
5759 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5761 struct comp_unit_head
*cu_header
= &cu
->header
;
5763 struct attribute
*attr
;
5765 type
= lookup_reference_type (die_type (die
, cu
));
5766 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5769 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5773 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5775 return set_die_type (die
, type
, cu
);
5778 static struct type
*
5779 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5781 struct type
*base_type
, *cv_type
;
5783 base_type
= die_type (die
, cu
);
5784 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5785 return set_die_type (die
, cv_type
, cu
);
5788 static struct type
*
5789 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5791 struct type
*base_type
, *cv_type
;
5793 base_type
= die_type (die
, cu
);
5794 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5795 return set_die_type (die
, cv_type
, cu
);
5798 /* Extract all information from a DW_TAG_string_type DIE and add to
5799 the user defined type vector. It isn't really a user defined type,
5800 but it behaves like one, with other DIE's using an AT_user_def_type
5801 attribute to reference it. */
5803 static struct type
*
5804 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5806 struct objfile
*objfile
= cu
->objfile
;
5807 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5808 struct type
*type
, *range_type
, *index_type
, *char_type
;
5809 struct attribute
*attr
;
5810 unsigned int length
;
5812 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5815 length
= DW_UNSND (attr
);
5819 /* check for the DW_AT_byte_size attribute */
5820 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5823 length
= DW_UNSND (attr
);
5831 index_type
= objfile_type (objfile
)->builtin_int
;
5832 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5833 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5834 type
= create_string_type (NULL
, char_type
, range_type
);
5836 return set_die_type (die
, type
, cu
);
5839 /* Handle DIES due to C code like:
5843 int (*funcp)(int a, long l);
5847 ('funcp' generates a DW_TAG_subroutine_type DIE)
5850 static struct type
*
5851 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5853 struct type
*type
; /* Type that this function returns */
5854 struct type
*ftype
; /* Function that returns above type */
5855 struct attribute
*attr
;
5857 type
= die_type (die
, cu
);
5858 ftype
= lookup_function_type (type
);
5860 /* All functions in C++, Pascal and Java have prototypes. */
5861 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5862 if ((attr
&& (DW_UNSND (attr
) != 0))
5863 || cu
->language
== language_cplus
5864 || cu
->language
== language_java
5865 || cu
->language
== language_pascal
)
5866 TYPE_PROTOTYPED (ftype
) = 1;
5868 /* Store the calling convention in the type if it's available in
5869 the subroutine die. Otherwise set the calling convention to
5870 the default value DW_CC_normal. */
5871 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5872 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5874 if (die
->child
!= NULL
)
5876 struct die_info
*child_die
;
5880 /* Count the number of parameters.
5881 FIXME: GDB currently ignores vararg functions, but knows about
5882 vararg member functions. */
5883 child_die
= die
->child
;
5884 while (child_die
&& child_die
->tag
)
5886 if (child_die
->tag
== DW_TAG_formal_parameter
)
5888 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5889 TYPE_VARARGS (ftype
) = 1;
5890 child_die
= sibling_die (child_die
);
5893 /* Allocate storage for parameters and fill them in. */
5894 TYPE_NFIELDS (ftype
) = nparams
;
5895 TYPE_FIELDS (ftype
) = (struct field
*)
5896 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5898 child_die
= die
->child
;
5899 while (child_die
&& child_die
->tag
)
5901 if (child_die
->tag
== DW_TAG_formal_parameter
)
5903 /* Dwarf2 has no clean way to discern C++ static and non-static
5904 member functions. G++ helps GDB by marking the first
5905 parameter for non-static member functions (which is the
5906 this pointer) as artificial. We pass this information
5907 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5908 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5910 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5912 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5913 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
5916 child_die
= sibling_die (child_die
);
5920 return set_die_type (die
, ftype
, cu
);
5923 static struct type
*
5924 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
5926 struct objfile
*objfile
= cu
->objfile
;
5927 struct attribute
*attr
;
5928 const char *name
= NULL
;
5929 struct type
*this_type
;
5931 name
= dwarf2_full_name (die
, cu
);
5932 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
5933 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
5934 TYPE_NAME (this_type
) = (char *) name
;
5935 set_die_type (die
, this_type
, cu
);
5936 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
5940 /* Find a representation of a given base type and install
5941 it in the TYPE field of the die. */
5943 static struct type
*
5944 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5946 struct objfile
*objfile
= cu
->objfile
;
5948 struct attribute
*attr
;
5949 int encoding
= 0, size
= 0;
5951 enum type_code code
= TYPE_CODE_INT
;
5953 struct type
*target_type
= NULL
;
5955 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5958 encoding
= DW_UNSND (attr
);
5960 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5963 size
= DW_UNSND (attr
);
5965 name
= dwarf2_name (die
, cu
);
5968 complaint (&symfile_complaints
,
5969 _("DW_AT_name missing from DW_TAG_base_type"));
5974 case DW_ATE_address
:
5975 /* Turn DW_ATE_address into a void * pointer. */
5976 code
= TYPE_CODE_PTR
;
5977 type_flags
|= TYPE_FLAG_UNSIGNED
;
5978 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5980 case DW_ATE_boolean
:
5981 code
= TYPE_CODE_BOOL
;
5982 type_flags
|= TYPE_FLAG_UNSIGNED
;
5984 case DW_ATE_complex_float
:
5985 code
= TYPE_CODE_COMPLEX
;
5986 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
5988 case DW_ATE_decimal_float
:
5989 code
= TYPE_CODE_DECFLOAT
;
5992 code
= TYPE_CODE_FLT
;
5996 case DW_ATE_unsigned
:
5997 type_flags
|= TYPE_FLAG_UNSIGNED
;
5999 case DW_ATE_signed_char
:
6000 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6001 || cu
->language
== language_pascal
)
6002 code
= TYPE_CODE_CHAR
;
6004 case DW_ATE_unsigned_char
:
6005 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6006 || cu
->language
== language_pascal
)
6007 code
= TYPE_CODE_CHAR
;
6008 type_flags
|= TYPE_FLAG_UNSIGNED
;
6011 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6012 dwarf_type_encoding_name (encoding
));
6016 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6017 TYPE_NAME (type
) = name
;
6018 TYPE_TARGET_TYPE (type
) = target_type
;
6020 if (name
&& strcmp (name
, "char") == 0)
6021 TYPE_NOSIGN (type
) = 1;
6023 return set_die_type (die
, type
, cu
);
6026 /* Read the given DW_AT_subrange DIE. */
6028 static struct type
*
6029 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6031 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6032 struct type
*base_type
;
6033 struct type
*range_type
;
6034 struct attribute
*attr
;
6039 base_type
= die_type (die
, cu
);
6040 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6042 complaint (&symfile_complaints
,
6043 _("DW_AT_type missing from DW_TAG_subrange_type"));
6045 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
6046 0, NULL
, cu
->objfile
);
6049 if (cu
->language
== language_fortran
)
6051 /* FORTRAN implies a lower bound of 1, if not given. */
6055 /* FIXME: For variable sized arrays either of these could be
6056 a variable rather than a constant value. We'll allow it,
6057 but we don't know how to handle it. */
6058 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6060 low
= dwarf2_get_attr_constant_value (attr
, 0);
6062 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6065 if (attr
->form
== DW_FORM_block1
)
6067 /* GCC encodes arrays with unspecified or dynamic length
6068 with a DW_FORM_block1 attribute.
6069 FIXME: GDB does not yet know how to handle dynamic
6070 arrays properly, treat them as arrays with unspecified
6073 FIXME: jimb/2003-09-22: GDB does not really know
6074 how to handle arrays of unspecified length
6075 either; we just represent them as zero-length
6076 arrays. Choose an appropriate upper bound given
6077 the lower bound we've computed above. */
6081 high
= dwarf2_get_attr_constant_value (attr
, 1);
6084 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6086 name
= dwarf2_name (die
, cu
);
6088 TYPE_NAME (range_type
) = name
;
6090 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6092 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6094 return set_die_type (die
, range_type
, cu
);
6097 static struct type
*
6098 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6102 /* For now, we only support the C meaning of an unspecified type: void. */
6104 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6105 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6107 return set_die_type (die
, type
, cu
);
6110 /* Trivial hash function for die_info: the hash value of a DIE
6111 is its offset in .debug_info for this objfile. */
6114 die_hash (const void *item
)
6116 const struct die_info
*die
= item
;
6120 /* Trivial comparison function for die_info structures: two DIEs
6121 are equal if they have the same offset. */
6124 die_eq (const void *item_lhs
, const void *item_rhs
)
6126 const struct die_info
*die_lhs
= item_lhs
;
6127 const struct die_info
*die_rhs
= item_rhs
;
6128 return die_lhs
->offset
== die_rhs
->offset
;
6131 /* Read a whole compilation unit into a linked list of dies. */
6133 static struct die_info
*
6134 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6136 struct die_reader_specs reader_specs
;
6138 gdb_assert (cu
->die_hash
== NULL
);
6140 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6144 &cu
->comp_unit_obstack
,
6145 hashtab_obstack_allocate
,
6146 dummy_obstack_deallocate
);
6148 init_cu_die_reader (&reader_specs
, cu
);
6150 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6153 /* Main entry point for reading a DIE and all children.
6154 Read the DIE and dump it if requested. */
6156 static struct die_info
*
6157 read_die_and_children (const struct die_reader_specs
*reader
,
6159 gdb_byte
**new_info_ptr
,
6160 struct die_info
*parent
)
6162 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6163 new_info_ptr
, parent
);
6165 if (dwarf2_die_debug
)
6167 fprintf_unfiltered (gdb_stdlog
,
6168 "\nRead die from %s of %s:\n",
6169 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6171 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6173 : "unknown section",
6174 reader
->abfd
->filename
);
6175 dump_die (result
, dwarf2_die_debug
);
6181 /* Read a single die and all its descendents. Set the die's sibling
6182 field to NULL; set other fields in the die correctly, and set all
6183 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6184 location of the info_ptr after reading all of those dies. PARENT
6185 is the parent of the die in question. */
6187 static struct die_info
*
6188 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6190 gdb_byte
**new_info_ptr
,
6191 struct die_info
*parent
)
6193 struct die_info
*die
;
6197 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6200 *new_info_ptr
= cur_ptr
;
6203 store_in_ref_table (die
, reader
->cu
);
6206 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6210 *new_info_ptr
= cur_ptr
;
6213 die
->sibling
= NULL
;
6214 die
->parent
= parent
;
6218 /* Read a die, all of its descendents, and all of its siblings; set
6219 all of the fields of all of the dies correctly. Arguments are as
6220 in read_die_and_children. */
6222 static struct die_info
*
6223 read_die_and_siblings (const struct die_reader_specs
*reader
,
6225 gdb_byte
**new_info_ptr
,
6226 struct die_info
*parent
)
6228 struct die_info
*first_die
, *last_sibling
;
6232 first_die
= last_sibling
= NULL
;
6236 struct die_info
*die
6237 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6241 *new_info_ptr
= cur_ptr
;
6248 last_sibling
->sibling
= die
;
6254 /* Read the die from the .debug_info section buffer. Set DIEP to
6255 point to a newly allocated die with its information, except for its
6256 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6257 whether the die has children or not. */
6260 read_full_die (const struct die_reader_specs
*reader
,
6261 struct die_info
**diep
, gdb_byte
*info_ptr
,
6264 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6265 struct abbrev_info
*abbrev
;
6266 struct die_info
*die
;
6267 struct dwarf2_cu
*cu
= reader
->cu
;
6268 bfd
*abfd
= reader
->abfd
;
6270 offset
= info_ptr
- reader
->buffer
;
6271 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6272 info_ptr
+= bytes_read
;
6280 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6282 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6284 bfd_get_filename (abfd
));
6286 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6287 die
->offset
= offset
;
6288 die
->tag
= abbrev
->tag
;
6289 die
->abbrev
= abbrev_number
;
6291 die
->num_attrs
= abbrev
->num_attrs
;
6293 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6294 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6295 abfd
, info_ptr
, cu
);
6298 *has_children
= abbrev
->has_children
;
6302 /* In DWARF version 2, the description of the debugging information is
6303 stored in a separate .debug_abbrev section. Before we read any
6304 dies from a section we read in all abbreviations and install them
6305 in a hash table. This function also sets flags in CU describing
6306 the data found in the abbrev table. */
6309 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6311 struct comp_unit_head
*cu_header
= &cu
->header
;
6312 gdb_byte
*abbrev_ptr
;
6313 struct abbrev_info
*cur_abbrev
;
6314 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6315 unsigned int abbrev_form
, hash_number
;
6316 struct attr_abbrev
*cur_attrs
;
6317 unsigned int allocated_attrs
;
6319 /* Initialize dwarf2 abbrevs */
6320 obstack_init (&cu
->abbrev_obstack
);
6321 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6323 * sizeof (struct abbrev_info
*)));
6324 memset (cu
->dwarf2_abbrevs
, 0,
6325 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6327 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6328 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6329 abbrev_ptr
+= bytes_read
;
6331 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6332 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6334 /* loop until we reach an abbrev number of 0 */
6335 while (abbrev_number
)
6337 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6339 /* read in abbrev header */
6340 cur_abbrev
->number
= abbrev_number
;
6341 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6342 abbrev_ptr
+= bytes_read
;
6343 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6346 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6347 cu
->has_namespace_info
= 1;
6349 /* now read in declarations */
6350 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6351 abbrev_ptr
+= bytes_read
;
6352 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6353 abbrev_ptr
+= bytes_read
;
6356 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6358 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6360 = xrealloc (cur_attrs
, (allocated_attrs
6361 * sizeof (struct attr_abbrev
)));
6364 /* Record whether this compilation unit might have
6365 inter-compilation-unit references. If we don't know what form
6366 this attribute will have, then it might potentially be a
6367 DW_FORM_ref_addr, so we conservatively expect inter-CU
6370 if (abbrev_form
== DW_FORM_ref_addr
6371 || abbrev_form
== DW_FORM_indirect
)
6372 cu
->has_form_ref_addr
= 1;
6374 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6375 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6376 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6377 abbrev_ptr
+= bytes_read
;
6378 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6379 abbrev_ptr
+= bytes_read
;
6382 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6383 (cur_abbrev
->num_attrs
6384 * sizeof (struct attr_abbrev
)));
6385 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6386 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6388 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6389 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6390 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6392 /* Get next abbreviation.
6393 Under Irix6 the abbreviations for a compilation unit are not
6394 always properly terminated with an abbrev number of 0.
6395 Exit loop if we encounter an abbreviation which we have
6396 already read (which means we are about to read the abbreviations
6397 for the next compile unit) or if the end of the abbreviation
6398 table is reached. */
6399 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6400 >= dwarf2_per_objfile
->abbrev
.size
)
6402 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6403 abbrev_ptr
+= bytes_read
;
6404 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6411 /* Release the memory used by the abbrev table for a compilation unit. */
6414 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6416 struct dwarf2_cu
*cu
= ptr_to_cu
;
6418 obstack_free (&cu
->abbrev_obstack
, NULL
);
6419 cu
->dwarf2_abbrevs
= NULL
;
6422 /* Lookup an abbrev_info structure in the abbrev hash table. */
6424 static struct abbrev_info
*
6425 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6427 unsigned int hash_number
;
6428 struct abbrev_info
*abbrev
;
6430 hash_number
= number
% ABBREV_HASH_SIZE
;
6431 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6435 if (abbrev
->number
== number
)
6438 abbrev
= abbrev
->next
;
6443 /* Returns nonzero if TAG represents a type that we might generate a partial
6447 is_type_tag_for_partial (int tag
)
6452 /* Some types that would be reasonable to generate partial symbols for,
6453 that we don't at present. */
6454 case DW_TAG_array_type
:
6455 case DW_TAG_file_type
:
6456 case DW_TAG_ptr_to_member_type
:
6457 case DW_TAG_set_type
:
6458 case DW_TAG_string_type
:
6459 case DW_TAG_subroutine_type
:
6461 case DW_TAG_base_type
:
6462 case DW_TAG_class_type
:
6463 case DW_TAG_interface_type
:
6464 case DW_TAG_enumeration_type
:
6465 case DW_TAG_structure_type
:
6466 case DW_TAG_subrange_type
:
6467 case DW_TAG_typedef
:
6468 case DW_TAG_union_type
:
6475 /* Load all DIEs that are interesting for partial symbols into memory. */
6477 static struct partial_die_info
*
6478 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6479 int building_psymtab
, struct dwarf2_cu
*cu
)
6481 struct partial_die_info
*part_die
;
6482 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6483 struct abbrev_info
*abbrev
;
6484 unsigned int bytes_read
;
6485 unsigned int load_all
= 0;
6487 int nesting_level
= 1;
6492 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6496 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6500 &cu
->comp_unit_obstack
,
6501 hashtab_obstack_allocate
,
6502 dummy_obstack_deallocate
);
6504 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6505 sizeof (struct partial_die_info
));
6509 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6511 /* A NULL abbrev means the end of a series of children. */
6514 if (--nesting_level
== 0)
6516 /* PART_DIE was probably the last thing allocated on the
6517 comp_unit_obstack, so we could call obstack_free
6518 here. We don't do that because the waste is small,
6519 and will be cleaned up when we're done with this
6520 compilation unit. This way, we're also more robust
6521 against other users of the comp_unit_obstack. */
6524 info_ptr
+= bytes_read
;
6525 last_die
= parent_die
;
6526 parent_die
= parent_die
->die_parent
;
6530 /* Check whether this DIE is interesting enough to save. Normally
6531 we would not be interested in members here, but there may be
6532 later variables referencing them via DW_AT_specification (for
6535 && !is_type_tag_for_partial (abbrev
->tag
)
6536 && abbrev
->tag
!= DW_TAG_enumerator
6537 && abbrev
->tag
!= DW_TAG_subprogram
6538 && abbrev
->tag
!= DW_TAG_lexical_block
6539 && abbrev
->tag
!= DW_TAG_variable
6540 && abbrev
->tag
!= DW_TAG_namespace
6541 && abbrev
->tag
!= DW_TAG_member
)
6543 /* Otherwise we skip to the next sibling, if any. */
6544 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6548 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6549 buffer
, info_ptr
, cu
);
6551 /* This two-pass algorithm for processing partial symbols has a
6552 high cost in cache pressure. Thus, handle some simple cases
6553 here which cover the majority of C partial symbols. DIEs
6554 which neither have specification tags in them, nor could have
6555 specification tags elsewhere pointing at them, can simply be
6556 processed and discarded.
6558 This segment is also optional; scan_partial_symbols and
6559 add_partial_symbol will handle these DIEs if we chain
6560 them in normally. When compilers which do not emit large
6561 quantities of duplicate debug information are more common,
6562 this code can probably be removed. */
6564 /* Any complete simple types at the top level (pretty much all
6565 of them, for a language without namespaces), can be processed
6567 if (parent_die
== NULL
6568 && part_die
->has_specification
== 0
6569 && part_die
->is_declaration
== 0
6570 && (part_die
->tag
== DW_TAG_typedef
6571 || part_die
->tag
== DW_TAG_base_type
6572 || part_die
->tag
== DW_TAG_subrange_type
))
6574 if (building_psymtab
&& part_die
->name
!= NULL
)
6575 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
6576 VAR_DOMAIN
, LOC_TYPEDEF
,
6577 &cu
->objfile
->static_psymbols
,
6578 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6579 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6583 /* If we're at the second level, and we're an enumerator, and
6584 our parent has no specification (meaning possibly lives in a
6585 namespace elsewhere), then we can add the partial symbol now
6586 instead of queueing it. */
6587 if (part_die
->tag
== DW_TAG_enumerator
6588 && parent_die
!= NULL
6589 && parent_die
->die_parent
== NULL
6590 && parent_die
->tag
== DW_TAG_enumeration_type
6591 && parent_die
->has_specification
== 0)
6593 if (part_die
->name
== NULL
)
6594 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6595 else if (building_psymtab
)
6596 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
6597 VAR_DOMAIN
, LOC_CONST
,
6598 (cu
->language
== language_cplus
6599 || cu
->language
== language_java
)
6600 ? &cu
->objfile
->global_psymbols
6601 : &cu
->objfile
->static_psymbols
,
6602 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6604 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6608 /* We'll save this DIE so link it in. */
6609 part_die
->die_parent
= parent_die
;
6610 part_die
->die_sibling
= NULL
;
6611 part_die
->die_child
= NULL
;
6613 if (last_die
&& last_die
== parent_die
)
6614 last_die
->die_child
= part_die
;
6616 last_die
->die_sibling
= part_die
;
6618 last_die
= part_die
;
6620 if (first_die
== NULL
)
6621 first_die
= part_die
;
6623 /* Maybe add the DIE to the hash table. Not all DIEs that we
6624 find interesting need to be in the hash table, because we
6625 also have the parent/sibling/child chains; only those that we
6626 might refer to by offset later during partial symbol reading.
6628 For now this means things that might have be the target of a
6629 DW_AT_specification, DW_AT_abstract_origin, or
6630 DW_AT_extension. DW_AT_extension will refer only to
6631 namespaces; DW_AT_abstract_origin refers to functions (and
6632 many things under the function DIE, but we do not recurse
6633 into function DIEs during partial symbol reading) and
6634 possibly variables as well; DW_AT_specification refers to
6635 declarations. Declarations ought to have the DW_AT_declaration
6636 flag. It happens that GCC forgets to put it in sometimes, but
6637 only for functions, not for types.
6639 Adding more things than necessary to the hash table is harmless
6640 except for the performance cost. Adding too few will result in
6641 wasted time in find_partial_die, when we reread the compilation
6642 unit with load_all_dies set. */
6645 || abbrev
->tag
== DW_TAG_subprogram
6646 || abbrev
->tag
== DW_TAG_variable
6647 || abbrev
->tag
== DW_TAG_namespace
6648 || part_die
->is_declaration
)
6652 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6653 part_die
->offset
, INSERT
);
6657 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6658 sizeof (struct partial_die_info
));
6660 /* For some DIEs we want to follow their children (if any). For C
6661 we have no reason to follow the children of structures; for other
6662 languages we have to, both so that we can get at method physnames
6663 to infer fully qualified class names, and for DW_AT_specification.
6665 For Ada, we need to scan the children of subprograms and lexical
6666 blocks as well because Ada allows the definition of nested
6667 entities that could be interesting for the debugger, such as
6668 nested subprograms for instance. */
6669 if (last_die
->has_children
6671 || last_die
->tag
== DW_TAG_namespace
6672 || last_die
->tag
== DW_TAG_enumeration_type
6673 || (cu
->language
!= language_c
6674 && (last_die
->tag
== DW_TAG_class_type
6675 || last_die
->tag
== DW_TAG_interface_type
6676 || last_die
->tag
== DW_TAG_structure_type
6677 || last_die
->tag
== DW_TAG_union_type
))
6678 || (cu
->language
== language_ada
6679 && (last_die
->tag
== DW_TAG_subprogram
6680 || last_die
->tag
== DW_TAG_lexical_block
))))
6683 parent_die
= last_die
;
6687 /* Otherwise we skip to the next sibling, if any. */
6688 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6690 /* Back to the top, do it again. */
6694 /* Read a minimal amount of information into the minimal die structure. */
6697 read_partial_die (struct partial_die_info
*part_die
,
6698 struct abbrev_info
*abbrev
,
6699 unsigned int abbrev_len
, bfd
*abfd
,
6700 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6701 struct dwarf2_cu
*cu
)
6703 unsigned int bytes_read
, i
;
6704 struct attribute attr
;
6705 int has_low_pc_attr
= 0;
6706 int has_high_pc_attr
= 0;
6708 memset (part_die
, 0, sizeof (struct partial_die_info
));
6710 part_die
->offset
= info_ptr
- buffer
;
6712 info_ptr
+= abbrev_len
;
6717 part_die
->tag
= abbrev
->tag
;
6718 part_die
->has_children
= abbrev
->has_children
;
6720 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6722 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6724 /* Store the data if it is of an attribute we want to keep in a
6725 partial symbol table. */
6729 switch (part_die
->tag
)
6731 case DW_TAG_compile_unit
:
6732 case DW_TAG_type_unit
:
6733 /* Compilation units have a DW_AT_name that is a filename, not
6734 a source language identifier. */
6735 case DW_TAG_enumeration_type
:
6736 case DW_TAG_enumerator
:
6737 /* These tags always have simple identifiers already; no need
6738 to canonicalize them. */
6739 part_die
->name
= DW_STRING (&attr
);
6743 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6744 &cu
->comp_unit_obstack
);
6748 case DW_AT_MIPS_linkage_name
:
6749 part_die
->name
= DW_STRING (&attr
);
6752 has_low_pc_attr
= 1;
6753 part_die
->lowpc
= DW_ADDR (&attr
);
6756 has_high_pc_attr
= 1;
6757 part_die
->highpc
= DW_ADDR (&attr
);
6759 case DW_AT_location
:
6760 /* Support the .debug_loc offsets */
6761 if (attr_form_is_block (&attr
))
6763 part_die
->locdesc
= DW_BLOCK (&attr
);
6765 else if (attr_form_is_section_offset (&attr
))
6767 dwarf2_complex_location_expr_complaint ();
6771 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6772 "partial symbol information");
6775 case DW_AT_external
:
6776 part_die
->is_external
= DW_UNSND (&attr
);
6778 case DW_AT_declaration
:
6779 part_die
->is_declaration
= DW_UNSND (&attr
);
6782 part_die
->has_type
= 1;
6784 case DW_AT_abstract_origin
:
6785 case DW_AT_specification
:
6786 case DW_AT_extension
:
6787 part_die
->has_specification
= 1;
6788 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6791 /* Ignore absolute siblings, they might point outside of
6792 the current compile unit. */
6793 if (attr
.form
== DW_FORM_ref_addr
)
6794 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6796 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6798 case DW_AT_byte_size
:
6799 part_die
->has_byte_size
= 1;
6801 case DW_AT_calling_convention
:
6802 /* DWARF doesn't provide a way to identify a program's source-level
6803 entry point. DW_AT_calling_convention attributes are only meant
6804 to describe functions' calling conventions.
6806 However, because it's a necessary piece of information in
6807 Fortran, and because DW_CC_program is the only piece of debugging
6808 information whose definition refers to a 'main program' at all,
6809 several compilers have begun marking Fortran main programs with
6810 DW_CC_program --- even when those functions use the standard
6811 calling conventions.
6813 So until DWARF specifies a way to provide this information and
6814 compilers pick up the new representation, we'll support this
6816 if (DW_UNSND (&attr
) == DW_CC_program
6817 && cu
->language
== language_fortran
)
6818 set_main_name (part_die
->name
);
6825 /* When using the GNU linker, .gnu.linkonce. sections are used to
6826 eliminate duplicate copies of functions and vtables and such.
6827 The linker will arbitrarily choose one and discard the others.
6828 The AT_*_pc values for such functions refer to local labels in
6829 these sections. If the section from that file was discarded, the
6830 labels are not in the output, so the relocs get a value of 0.
6831 If this is a discarded function, mark the pc bounds as invalid,
6832 so that GDB will ignore it. */
6833 if (has_low_pc_attr
&& has_high_pc_attr
6834 && part_die
->lowpc
< part_die
->highpc
6835 && (part_die
->lowpc
!= 0
6836 || dwarf2_per_objfile
->has_section_at_zero
))
6837 part_die
->has_pc_info
= 1;
6842 /* Find a cached partial DIE at OFFSET in CU. */
6844 static struct partial_die_info
*
6845 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6847 struct partial_die_info
*lookup_die
= NULL
;
6848 struct partial_die_info part_die
;
6850 part_die
.offset
= offset
;
6851 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6856 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6857 except in the case of .debug_types DIEs which do not reference
6858 outside their CU (they do however referencing other types via
6861 static struct partial_die_info
*
6862 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6864 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6865 struct partial_die_info
*pd
= NULL
;
6867 if (cu
->per_cu
->from_debug_types
)
6869 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6875 if (offset_in_cu_p (&cu
->header
, offset
))
6877 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6882 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6884 if (per_cu
->cu
== NULL
)
6886 load_partial_comp_unit (per_cu
, cu
->objfile
);
6887 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6888 dwarf2_per_objfile
->read_in_chain
= per_cu
;
6891 per_cu
->cu
->last_used
= 0;
6892 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6894 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
6896 struct cleanup
*back_to
;
6897 struct partial_die_info comp_unit_die
;
6898 struct abbrev_info
*abbrev
;
6899 unsigned int bytes_read
;
6902 per_cu
->load_all_dies
= 1;
6904 /* Re-read the DIEs. */
6905 back_to
= make_cleanup (null_cleanup
, 0);
6906 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6908 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6909 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6911 info_ptr
= (dwarf2_per_objfile
->info
.buffer
6912 + per_cu
->cu
->header
.offset
6913 + per_cu
->cu
->header
.first_die_offset
);
6914 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6915 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6916 per_cu
->cu
->objfile
->obfd
,
6917 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6919 if (comp_unit_die
.has_children
)
6920 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
6921 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6923 do_cleanups (back_to
);
6925 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6931 internal_error (__FILE__
, __LINE__
,
6932 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6933 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6937 /* Adjust PART_DIE before generating a symbol for it. This function
6938 may set the is_external flag or change the DIE's name. */
6941 fixup_partial_die (struct partial_die_info
*part_die
,
6942 struct dwarf2_cu
*cu
)
6944 /* If we found a reference attribute and the DIE has no name, try
6945 to find a name in the referred to DIE. */
6947 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6949 struct partial_die_info
*spec_die
;
6951 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6953 fixup_partial_die (spec_die
, cu
);
6957 part_die
->name
= spec_die
->name
;
6959 /* Copy DW_AT_external attribute if it is set. */
6960 if (spec_die
->is_external
)
6961 part_die
->is_external
= spec_die
->is_external
;
6965 /* Set default names for some unnamed DIEs. */
6966 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6967 || part_die
->tag
== DW_TAG_class_type
))
6968 part_die
->name
= "(anonymous class)";
6970 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6971 part_die
->name
= "(anonymous namespace)";
6973 if (part_die
->tag
== DW_TAG_structure_type
6974 || part_die
->tag
== DW_TAG_class_type
6975 || part_die
->tag
== DW_TAG_union_type
)
6976 guess_structure_name (part_die
, cu
);
6979 /* Read an attribute value described by an attribute form. */
6982 read_attribute_value (struct attribute
*attr
, unsigned form
,
6983 bfd
*abfd
, gdb_byte
*info_ptr
,
6984 struct dwarf2_cu
*cu
)
6986 struct comp_unit_head
*cu_header
= &cu
->header
;
6987 unsigned int bytes_read
;
6988 struct dwarf_block
*blk
;
6994 case DW_FORM_ref_addr
:
6995 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
6996 info_ptr
+= bytes_read
;
6998 case DW_FORM_block2
:
6999 blk
= dwarf_alloc_block (cu
);
7000 blk
->size
= read_2_bytes (abfd
, info_ptr
);
7002 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7003 info_ptr
+= blk
->size
;
7004 DW_BLOCK (attr
) = blk
;
7006 case DW_FORM_block4
:
7007 blk
= dwarf_alloc_block (cu
);
7008 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7010 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7011 info_ptr
+= blk
->size
;
7012 DW_BLOCK (attr
) = blk
;
7015 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7019 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7023 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7026 case DW_FORM_string
:
7027 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7028 DW_STRING_IS_CANONICAL (attr
) = 0;
7029 info_ptr
+= bytes_read
;
7032 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7034 DW_STRING_IS_CANONICAL (attr
) = 0;
7035 info_ptr
+= bytes_read
;
7038 blk
= dwarf_alloc_block (cu
);
7039 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7040 info_ptr
+= bytes_read
;
7041 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7042 info_ptr
+= blk
->size
;
7043 DW_BLOCK (attr
) = blk
;
7045 case DW_FORM_block1
:
7046 blk
= dwarf_alloc_block (cu
);
7047 blk
->size
= read_1_byte (abfd
, info_ptr
);
7049 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7050 info_ptr
+= blk
->size
;
7051 DW_BLOCK (attr
) = blk
;
7054 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7058 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7062 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7063 info_ptr
+= bytes_read
;
7066 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7067 info_ptr
+= bytes_read
;
7070 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7074 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7078 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7082 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7086 /* Convert the signature to something we can record in DW_UNSND
7088 NOTE: This is NULL if the type wasn't found. */
7089 DW_SIGNATURED_TYPE (attr
) =
7090 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7093 case DW_FORM_ref_udata
:
7094 DW_ADDR (attr
) = (cu
->header
.offset
7095 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7096 info_ptr
+= bytes_read
;
7098 case DW_FORM_indirect
:
7099 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7100 info_ptr
+= bytes_read
;
7101 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7104 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7105 dwarf_form_name (form
),
7106 bfd_get_filename (abfd
));
7109 /* We have seen instances where the compiler tried to emit a byte
7110 size attribute of -1 which ended up being encoded as an unsigned
7111 0xffffffff. Although 0xffffffff is technically a valid size value,
7112 an object of this size seems pretty unlikely so we can relatively
7113 safely treat these cases as if the size attribute was invalid and
7114 treat them as zero by default. */
7115 if (attr
->name
== DW_AT_byte_size
7116 && form
== DW_FORM_data4
7117 && DW_UNSND (attr
) >= 0xffffffff)
7120 (&symfile_complaints
,
7121 _("Suspicious DW_AT_byte_size value treated as zero instead of 0x%lx"),
7123 DW_UNSND (attr
) = 0;
7129 /* Read an attribute described by an abbreviated attribute. */
7132 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7133 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7135 attr
->name
= abbrev
->name
;
7136 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7139 /* read dwarf information from a buffer */
7142 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7144 return bfd_get_8 (abfd
, buf
);
7148 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7150 return bfd_get_signed_8 (abfd
, buf
);
7154 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7156 return bfd_get_16 (abfd
, buf
);
7160 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7162 return bfd_get_signed_16 (abfd
, buf
);
7166 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7168 return bfd_get_32 (abfd
, buf
);
7172 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7174 return bfd_get_signed_32 (abfd
, buf
);
7178 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7180 return bfd_get_64 (abfd
, buf
);
7184 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7185 unsigned int *bytes_read
)
7187 struct comp_unit_head
*cu_header
= &cu
->header
;
7188 CORE_ADDR retval
= 0;
7190 if (cu_header
->signed_addr_p
)
7192 switch (cu_header
->addr_size
)
7195 retval
= bfd_get_signed_16 (abfd
, buf
);
7198 retval
= bfd_get_signed_32 (abfd
, buf
);
7201 retval
= bfd_get_signed_64 (abfd
, buf
);
7204 internal_error (__FILE__
, __LINE__
,
7205 _("read_address: bad switch, signed [in module %s]"),
7206 bfd_get_filename (abfd
));
7211 switch (cu_header
->addr_size
)
7214 retval
= bfd_get_16 (abfd
, buf
);
7217 retval
= bfd_get_32 (abfd
, buf
);
7220 retval
= bfd_get_64 (abfd
, buf
);
7223 internal_error (__FILE__
, __LINE__
,
7224 _("read_address: bad switch, unsigned [in module %s]"),
7225 bfd_get_filename (abfd
));
7229 *bytes_read
= cu_header
->addr_size
;
7233 /* Read the initial length from a section. The (draft) DWARF 3
7234 specification allows the initial length to take up either 4 bytes
7235 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7236 bytes describe the length and all offsets will be 8 bytes in length
7239 An older, non-standard 64-bit format is also handled by this
7240 function. The older format in question stores the initial length
7241 as an 8-byte quantity without an escape value. Lengths greater
7242 than 2^32 aren't very common which means that the initial 4 bytes
7243 is almost always zero. Since a length value of zero doesn't make
7244 sense for the 32-bit format, this initial zero can be considered to
7245 be an escape value which indicates the presence of the older 64-bit
7246 format. As written, the code can't detect (old format) lengths
7247 greater than 4GB. If it becomes necessary to handle lengths
7248 somewhat larger than 4GB, we could allow other small values (such
7249 as the non-sensical values of 1, 2, and 3) to also be used as
7250 escape values indicating the presence of the old format.
7252 The value returned via bytes_read should be used to increment the
7253 relevant pointer after calling read_initial_length().
7255 [ Note: read_initial_length() and read_offset() are based on the
7256 document entitled "DWARF Debugging Information Format", revision
7257 3, draft 8, dated November 19, 2001. This document was obtained
7260 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7262 This document is only a draft and is subject to change. (So beware.)
7264 Details regarding the older, non-standard 64-bit format were
7265 determined empirically by examining 64-bit ELF files produced by
7266 the SGI toolchain on an IRIX 6.5 machine.
7268 - Kevin, July 16, 2002
7272 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7274 LONGEST length
= bfd_get_32 (abfd
, buf
);
7276 if (length
== 0xffffffff)
7278 length
= bfd_get_64 (abfd
, buf
+ 4);
7281 else if (length
== 0)
7283 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7284 length
= bfd_get_64 (abfd
, buf
);
7295 /* Cover function for read_initial_length.
7296 Returns the length of the object at BUF, and stores the size of the
7297 initial length in *BYTES_READ and stores the size that offsets will be in
7299 If the initial length size is not equivalent to that specified in
7300 CU_HEADER then issue a complaint.
7301 This is useful when reading non-comp-unit headers. */
7304 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7305 const struct comp_unit_head
*cu_header
,
7306 unsigned int *bytes_read
,
7307 unsigned int *offset_size
)
7309 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7311 gdb_assert (cu_header
->initial_length_size
== 4
7312 || cu_header
->initial_length_size
== 8
7313 || cu_header
->initial_length_size
== 12);
7315 if (cu_header
->initial_length_size
!= *bytes_read
)
7316 complaint (&symfile_complaints
,
7317 _("intermixed 32-bit and 64-bit DWARF sections"));
7319 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7323 /* Read an offset from the data stream. The size of the offset is
7324 given by cu_header->offset_size. */
7327 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7328 unsigned int *bytes_read
)
7330 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7331 *bytes_read
= cu_header
->offset_size
;
7335 /* Read an offset from the data stream. */
7338 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7342 switch (offset_size
)
7345 retval
= bfd_get_32 (abfd
, buf
);
7348 retval
= bfd_get_64 (abfd
, buf
);
7351 internal_error (__FILE__
, __LINE__
,
7352 _("read_offset_1: bad switch [in module %s]"),
7353 bfd_get_filename (abfd
));
7360 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7362 /* If the size of a host char is 8 bits, we can return a pointer
7363 to the buffer, otherwise we have to copy the data to a buffer
7364 allocated on the temporary obstack. */
7365 gdb_assert (HOST_CHAR_BIT
== 8);
7370 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7372 /* If the size of a host char is 8 bits, we can return a pointer
7373 to the string, otherwise we have to copy the string to a buffer
7374 allocated on the temporary obstack. */
7375 gdb_assert (HOST_CHAR_BIT
== 8);
7378 *bytes_read_ptr
= 1;
7381 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7382 return (char *) buf
;
7386 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7387 const struct comp_unit_head
*cu_header
,
7388 unsigned int *bytes_read_ptr
)
7390 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7392 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7394 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7395 bfd_get_filename (abfd
));
7398 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7400 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7401 bfd_get_filename (abfd
));
7404 gdb_assert (HOST_CHAR_BIT
== 8);
7405 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7407 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7410 static unsigned long
7411 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7413 unsigned long result
;
7414 unsigned int num_read
;
7424 byte
= bfd_get_8 (abfd
, buf
);
7427 result
|= ((unsigned long)(byte
& 127) << shift
);
7428 if ((byte
& 128) == 0)
7434 *bytes_read_ptr
= num_read
;
7439 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7442 int i
, shift
, num_read
;
7451 byte
= bfd_get_8 (abfd
, buf
);
7454 result
|= ((long)(byte
& 127) << shift
);
7456 if ((byte
& 128) == 0)
7461 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7462 result
|= -(((long)1) << shift
);
7463 *bytes_read_ptr
= num_read
;
7467 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7470 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7476 byte
= bfd_get_8 (abfd
, buf
);
7478 if ((byte
& 128) == 0)
7484 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7491 cu
->language
= language_c
;
7493 case DW_LANG_C_plus_plus
:
7494 cu
->language
= language_cplus
;
7496 case DW_LANG_Fortran77
:
7497 case DW_LANG_Fortran90
:
7498 case DW_LANG_Fortran95
:
7499 cu
->language
= language_fortran
;
7501 case DW_LANG_Mips_Assembler
:
7502 cu
->language
= language_asm
;
7505 cu
->language
= language_java
;
7509 cu
->language
= language_ada
;
7511 case DW_LANG_Modula2
:
7512 cu
->language
= language_m2
;
7514 case DW_LANG_Pascal83
:
7515 cu
->language
= language_pascal
;
7518 cu
->language
= language_objc
;
7520 case DW_LANG_Cobol74
:
7521 case DW_LANG_Cobol85
:
7523 cu
->language
= language_minimal
;
7526 cu
->language_defn
= language_def (cu
->language
);
7529 /* Return the named attribute or NULL if not there. */
7531 static struct attribute
*
7532 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7535 struct attribute
*spec
= NULL
;
7537 for (i
= 0; i
< die
->num_attrs
; ++i
)
7539 if (die
->attrs
[i
].name
== name
)
7540 return &die
->attrs
[i
];
7541 if (die
->attrs
[i
].name
== DW_AT_specification
7542 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7543 spec
= &die
->attrs
[i
];
7548 die
= follow_die_ref (die
, spec
, &cu
);
7549 return dwarf2_attr (die
, name
, cu
);
7555 /* Return the named attribute or NULL if not there,
7556 but do not follow DW_AT_specification, etc.
7557 This is for use in contexts where we're reading .debug_types dies.
7558 Following DW_AT_specification, DW_AT_abstract_origin will take us
7559 back up the chain, and we want to go down. */
7561 static struct attribute
*
7562 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7563 struct dwarf2_cu
*cu
)
7567 for (i
= 0; i
< die
->num_attrs
; ++i
)
7568 if (die
->attrs
[i
].name
== name
)
7569 return &die
->attrs
[i
];
7574 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7575 and holds a non-zero value. This function should only be used for
7576 DW_FORM_flag attributes. */
7579 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7581 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7583 return (attr
&& DW_UNSND (attr
));
7587 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7589 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7590 which value is non-zero. However, we have to be careful with
7591 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7592 (via dwarf2_flag_true_p) follows this attribute. So we may
7593 end up accidently finding a declaration attribute that belongs
7594 to a different DIE referenced by the specification attribute,
7595 even though the given DIE does not have a declaration attribute. */
7596 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7597 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7600 /* Return the die giving the specification for DIE, if there is
7601 one. *SPEC_CU is the CU containing DIE on input, and the CU
7602 containing the return value on output. If there is no
7603 specification, but there is an abstract origin, that is
7606 static struct die_info
*
7607 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7609 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7612 if (spec_attr
== NULL
)
7613 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7615 if (spec_attr
== NULL
)
7618 return follow_die_ref (die
, spec_attr
, spec_cu
);
7621 /* Free the line_header structure *LH, and any arrays and strings it
7624 free_line_header (struct line_header
*lh
)
7626 if (lh
->standard_opcode_lengths
)
7627 xfree (lh
->standard_opcode_lengths
);
7629 /* Remember that all the lh->file_names[i].name pointers are
7630 pointers into debug_line_buffer, and don't need to be freed. */
7632 xfree (lh
->file_names
);
7634 /* Similarly for the include directory names. */
7635 if (lh
->include_dirs
)
7636 xfree (lh
->include_dirs
);
7642 /* Add an entry to LH's include directory table. */
7644 add_include_dir (struct line_header
*lh
, char *include_dir
)
7646 /* Grow the array if necessary. */
7647 if (lh
->include_dirs_size
== 0)
7649 lh
->include_dirs_size
= 1; /* for testing */
7650 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7651 * sizeof (*lh
->include_dirs
));
7653 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7655 lh
->include_dirs_size
*= 2;
7656 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7657 (lh
->include_dirs_size
7658 * sizeof (*lh
->include_dirs
)));
7661 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7665 /* Add an entry to LH's file name table. */
7667 add_file_name (struct line_header
*lh
,
7669 unsigned int dir_index
,
7670 unsigned int mod_time
,
7671 unsigned int length
)
7673 struct file_entry
*fe
;
7675 /* Grow the array if necessary. */
7676 if (lh
->file_names_size
== 0)
7678 lh
->file_names_size
= 1; /* for testing */
7679 lh
->file_names
= xmalloc (lh
->file_names_size
7680 * sizeof (*lh
->file_names
));
7682 else if (lh
->num_file_names
>= lh
->file_names_size
)
7684 lh
->file_names_size
*= 2;
7685 lh
->file_names
= xrealloc (lh
->file_names
,
7686 (lh
->file_names_size
7687 * sizeof (*lh
->file_names
)));
7690 fe
= &lh
->file_names
[lh
->num_file_names
++];
7692 fe
->dir_index
= dir_index
;
7693 fe
->mod_time
= mod_time
;
7694 fe
->length
= length
;
7700 /* Read the statement program header starting at OFFSET in
7701 .debug_line, according to the endianness of ABFD. Return a pointer
7702 to a struct line_header, allocated using xmalloc.
7704 NOTE: the strings in the include directory and file name tables of
7705 the returned object point into debug_line_buffer, and must not be
7707 static struct line_header
*
7708 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7709 struct dwarf2_cu
*cu
)
7711 struct cleanup
*back_to
;
7712 struct line_header
*lh
;
7714 unsigned int bytes_read
, offset_size
;
7716 char *cur_dir
, *cur_file
;
7718 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7720 complaint (&symfile_complaints
, _("missing .debug_line section"));
7724 /* Make sure that at least there's room for the total_length field.
7725 That could be 12 bytes long, but we're just going to fudge that. */
7726 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7728 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7732 lh
= xmalloc (sizeof (*lh
));
7733 memset (lh
, 0, sizeof (*lh
));
7734 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7737 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7739 /* Read in the header. */
7741 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7742 &bytes_read
, &offset_size
);
7743 line_ptr
+= bytes_read
;
7744 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7745 + dwarf2_per_objfile
->line
.size
))
7747 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7750 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7751 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7753 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7754 line_ptr
+= offset_size
;
7755 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7757 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7759 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7761 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7763 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7765 lh
->standard_opcode_lengths
7766 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7768 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7769 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7771 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7775 /* Read directory table. */
7776 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7778 line_ptr
+= bytes_read
;
7779 add_include_dir (lh
, cur_dir
);
7781 line_ptr
+= bytes_read
;
7783 /* Read file name table. */
7784 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7786 unsigned int dir_index
, mod_time
, length
;
7788 line_ptr
+= bytes_read
;
7789 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7790 line_ptr
+= bytes_read
;
7791 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7792 line_ptr
+= bytes_read
;
7793 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7794 line_ptr
+= bytes_read
;
7796 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7798 line_ptr
+= bytes_read
;
7799 lh
->statement_program_start
= line_ptr
;
7801 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7802 + dwarf2_per_objfile
->line
.size
))
7803 complaint (&symfile_complaints
,
7804 _("line number info header doesn't fit in `.debug_line' section"));
7806 discard_cleanups (back_to
);
7810 /* This function exists to work around a bug in certain compilers
7811 (particularly GCC 2.95), in which the first line number marker of a
7812 function does not show up until after the prologue, right before
7813 the second line number marker. This function shifts ADDRESS down
7814 to the beginning of the function if necessary, and is called on
7815 addresses passed to record_line. */
7818 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7820 struct function_range
*fn
;
7822 /* Find the function_range containing address. */
7827 cu
->cached_fn
= cu
->first_fn
;
7831 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7837 while (fn
&& fn
!= cu
->cached_fn
)
7838 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7848 if (address
!= fn
->lowpc
)
7849 complaint (&symfile_complaints
,
7850 _("misplaced first line number at 0x%lx for '%s'"),
7851 (unsigned long) address
, fn
->name
);
7856 /* Decode the Line Number Program (LNP) for the given line_header
7857 structure and CU. The actual information extracted and the type
7858 of structures created from the LNP depends on the value of PST.
7860 1. If PST is NULL, then this procedure uses the data from the program
7861 to create all necessary symbol tables, and their linetables.
7862 The compilation directory of the file is passed in COMP_DIR,
7863 and must not be NULL.
7865 2. If PST is not NULL, this procedure reads the program to determine
7866 the list of files included by the unit represented by PST, and
7867 builds all the associated partial symbol tables. In this case,
7868 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7869 is not used to compute the full name of the symtab, and therefore
7870 omitting it when building the partial symtab does not introduce
7871 the potential for inconsistency - a partial symtab and its associated
7872 symbtab having a different fullname -). */
7875 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
7876 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
7878 gdb_byte
*line_ptr
, *extended_end
;
7880 unsigned int bytes_read
, extended_len
;
7881 unsigned char op_code
, extended_op
, adj_opcode
;
7883 struct objfile
*objfile
= cu
->objfile
;
7884 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7885 const int decode_for_pst_p
= (pst
!= NULL
);
7886 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
7888 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7890 line_ptr
= lh
->statement_program_start
;
7891 line_end
= lh
->statement_program_end
;
7893 /* Read the statement sequences until there's nothing left. */
7894 while (line_ptr
< line_end
)
7896 /* state machine registers */
7897 CORE_ADDR address
= 0;
7898 unsigned int file
= 1;
7899 unsigned int line
= 1;
7900 unsigned int column
= 0;
7901 int is_stmt
= lh
->default_is_stmt
;
7902 int basic_block
= 0;
7903 int end_sequence
= 0;
7906 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7908 /* Start a subfile for the current file of the state machine. */
7909 /* lh->include_dirs and lh->file_names are 0-based, but the
7910 directory and file name numbers in the statement program
7912 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7916 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7918 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7921 /* Decode the table. */
7922 while (!end_sequence
)
7924 op_code
= read_1_byte (abfd
, line_ptr
);
7926 if (line_ptr
> line_end
)
7928 dwarf2_debug_line_missing_end_sequence_complaint ();
7932 if (op_code
>= lh
->opcode_base
)
7934 /* Special operand. */
7935 adj_opcode
= op_code
- lh
->opcode_base
;
7936 address
+= (adj_opcode
/ lh
->line_range
)
7937 * lh
->minimum_instruction_length
;
7938 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7939 if (lh
->num_file_names
< file
|| file
== 0)
7940 dwarf2_debug_line_missing_file_complaint ();
7943 lh
->file_names
[file
- 1].included_p
= 1;
7944 if (!decode_for_pst_p
&& is_stmt
)
7946 if (last_subfile
!= current_subfile
)
7948 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7950 record_line (last_subfile
, 0, addr
);
7951 last_subfile
= current_subfile
;
7953 /* Append row to matrix using current values. */
7954 addr
= check_cu_functions (address
, cu
);
7955 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7956 record_line (current_subfile
, line
, addr
);
7961 else switch (op_code
)
7963 case DW_LNS_extended_op
:
7964 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7965 line_ptr
+= bytes_read
;
7966 extended_end
= line_ptr
+ extended_len
;
7967 extended_op
= read_1_byte (abfd
, line_ptr
);
7969 switch (extended_op
)
7971 case DW_LNE_end_sequence
:
7974 case DW_LNE_set_address
:
7975 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7976 line_ptr
+= bytes_read
;
7977 address
+= baseaddr
;
7979 case DW_LNE_define_file
:
7982 unsigned int dir_index
, mod_time
, length
;
7984 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
7985 line_ptr
+= bytes_read
;
7987 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7988 line_ptr
+= bytes_read
;
7990 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7991 line_ptr
+= bytes_read
;
7993 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7994 line_ptr
+= bytes_read
;
7995 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7998 case DW_LNE_set_discriminator
:
7999 /* The discriminator is not interesting to the debugger;
8001 line_ptr
= extended_end
;
8004 complaint (&symfile_complaints
,
8005 _("mangled .debug_line section"));
8008 /* Make sure that we parsed the extended op correctly. If e.g.
8009 we expected a different address size than the producer used,
8010 we may have read the wrong number of bytes. */
8011 if (line_ptr
!= extended_end
)
8013 complaint (&symfile_complaints
,
8014 _("mangled .debug_line section"));
8019 if (lh
->num_file_names
< file
|| file
== 0)
8020 dwarf2_debug_line_missing_file_complaint ();
8023 lh
->file_names
[file
- 1].included_p
= 1;
8024 if (!decode_for_pst_p
&& is_stmt
)
8026 if (last_subfile
!= current_subfile
)
8028 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8030 record_line (last_subfile
, 0, addr
);
8031 last_subfile
= current_subfile
;
8033 addr
= check_cu_functions (address
, cu
);
8034 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8035 record_line (current_subfile
, line
, addr
);
8040 case DW_LNS_advance_pc
:
8041 address
+= lh
->minimum_instruction_length
8042 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8043 line_ptr
+= bytes_read
;
8045 case DW_LNS_advance_line
:
8046 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8047 line_ptr
+= bytes_read
;
8049 case DW_LNS_set_file
:
8051 /* The arrays lh->include_dirs and lh->file_names are
8052 0-based, but the directory and file name numbers in
8053 the statement program are 1-based. */
8054 struct file_entry
*fe
;
8057 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8058 line_ptr
+= bytes_read
;
8059 if (lh
->num_file_names
< file
|| file
== 0)
8060 dwarf2_debug_line_missing_file_complaint ();
8063 fe
= &lh
->file_names
[file
- 1];
8065 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8066 if (!decode_for_pst_p
)
8068 last_subfile
= current_subfile
;
8069 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8074 case DW_LNS_set_column
:
8075 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8076 line_ptr
+= bytes_read
;
8078 case DW_LNS_negate_stmt
:
8079 is_stmt
= (!is_stmt
);
8081 case DW_LNS_set_basic_block
:
8084 /* Add to the address register of the state machine the
8085 address increment value corresponding to special opcode
8086 255. I.e., this value is scaled by the minimum
8087 instruction length since special opcode 255 would have
8088 scaled the the increment. */
8089 case DW_LNS_const_add_pc
:
8090 address
+= (lh
->minimum_instruction_length
8091 * ((255 - lh
->opcode_base
) / lh
->line_range
));
8093 case DW_LNS_fixed_advance_pc
:
8094 address
+= read_2_bytes (abfd
, line_ptr
);
8099 /* Unknown standard opcode, ignore it. */
8102 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8104 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8105 line_ptr
+= bytes_read
;
8110 if (lh
->num_file_names
< file
|| file
== 0)
8111 dwarf2_debug_line_missing_file_complaint ();
8114 lh
->file_names
[file
- 1].included_p
= 1;
8115 if (!decode_for_pst_p
)
8117 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8118 record_line (current_subfile
, 0, addr
);
8123 if (decode_for_pst_p
)
8127 /* Now that we're done scanning the Line Header Program, we can
8128 create the psymtab of each included file. */
8129 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8130 if (lh
->file_names
[file_index
].included_p
== 1)
8132 const struct file_entry fe
= lh
->file_names
[file_index
];
8133 char *include_name
= fe
.name
;
8134 char *dir_name
= NULL
;
8135 char *pst_filename
= pst
->filename
;
8138 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8140 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8142 include_name
= concat (dir_name
, SLASH_STRING
,
8143 include_name
, (char *)NULL
);
8144 make_cleanup (xfree
, include_name
);
8147 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8149 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8150 pst_filename
, (char *)NULL
);
8151 make_cleanup (xfree
, pst_filename
);
8154 if (strcmp (include_name
, pst_filename
) != 0)
8155 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8160 /* Make sure a symtab is created for every file, even files
8161 which contain only variables (i.e. no code with associated
8165 struct file_entry
*fe
;
8167 for (i
= 0; i
< lh
->num_file_names
; i
++)
8170 fe
= &lh
->file_names
[i
];
8172 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8173 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8175 /* Skip the main file; we don't need it, and it must be
8176 allocated last, so that it will show up before the
8177 non-primary symtabs in the objfile's symtab list. */
8178 if (current_subfile
== first_subfile
)
8181 if (current_subfile
->symtab
== NULL
)
8182 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8184 fe
->symtab
= current_subfile
->symtab
;
8189 /* Start a subfile for DWARF. FILENAME is the name of the file and
8190 DIRNAME the name of the source directory which contains FILENAME
8191 or NULL if not known. COMP_DIR is the compilation directory for the
8192 linetable's compilation unit or NULL if not known.
8193 This routine tries to keep line numbers from identical absolute and
8194 relative file names in a common subfile.
8196 Using the `list' example from the GDB testsuite, which resides in
8197 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8198 of /srcdir/list0.c yields the following debugging information for list0.c:
8200 DW_AT_name: /srcdir/list0.c
8201 DW_AT_comp_dir: /compdir
8202 files.files[0].name: list0.h
8203 files.files[0].dir: /srcdir
8204 files.files[1].name: list0.c
8205 files.files[1].dir: /srcdir
8207 The line number information for list0.c has to end up in a single
8208 subfile, so that `break /srcdir/list0.c:1' works as expected.
8209 start_subfile will ensure that this happens provided that we pass the
8210 concatenation of files.files[1].dir and files.files[1].name as the
8214 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8218 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8219 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8220 second argument to start_subfile. To be consistent, we do the
8221 same here. In order not to lose the line information directory,
8222 we concatenate it to the filename when it makes sense.
8223 Note that the Dwarf3 standard says (speaking of filenames in line
8224 information): ``The directory index is ignored for file names
8225 that represent full path names''. Thus ignoring dirname in the
8226 `else' branch below isn't an issue. */
8228 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8229 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8231 fullname
= filename
;
8233 start_subfile (fullname
, comp_dir
);
8235 if (fullname
!= filename
)
8240 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8241 struct dwarf2_cu
*cu
)
8243 struct objfile
*objfile
= cu
->objfile
;
8244 struct comp_unit_head
*cu_header
= &cu
->header
;
8246 /* NOTE drow/2003-01-30: There used to be a comment and some special
8247 code here to turn a symbol with DW_AT_external and a
8248 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8249 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8250 with some versions of binutils) where shared libraries could have
8251 relocations against symbols in their debug information - the
8252 minimal symbol would have the right address, but the debug info
8253 would not. It's no longer necessary, because we will explicitly
8254 apply relocations when we read in the debug information now. */
8256 /* A DW_AT_location attribute with no contents indicates that a
8257 variable has been optimized away. */
8258 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8260 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8264 /* Handle one degenerate form of location expression specially, to
8265 preserve GDB's previous behavior when section offsets are
8266 specified. If this is just a DW_OP_addr then mark this symbol
8269 if (attr_form_is_block (attr
)
8270 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8271 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8275 SYMBOL_VALUE_ADDRESS (sym
) =
8276 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8277 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8278 fixup_symbol_section (sym
, objfile
);
8279 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8280 SYMBOL_SECTION (sym
));
8284 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8285 expression evaluator, and use LOC_COMPUTED only when necessary
8286 (i.e. when the value of a register or memory location is
8287 referenced, or a thread-local block, etc.). Then again, it might
8288 not be worthwhile. I'm assuming that it isn't unless performance
8289 or memory numbers show me otherwise. */
8291 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8292 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8295 /* Given a pointer to a DWARF information entry, figure out if we need
8296 to make a symbol table entry for it, and if so, create a new entry
8297 and return a pointer to it.
8298 If TYPE is NULL, determine symbol type from the die, otherwise
8299 used the passed type. */
8301 static struct symbol
*
8302 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8304 struct objfile
*objfile
= cu
->objfile
;
8305 struct symbol
*sym
= NULL
;
8307 struct attribute
*attr
= NULL
;
8308 struct attribute
*attr2
= NULL
;
8310 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8312 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8314 if (die
->tag
!= DW_TAG_namespace
)
8315 name
= dwarf2_linkage_name (die
, cu
);
8317 name
= TYPE_NAME (type
);
8321 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8322 sizeof (struct symbol
));
8323 OBJSTAT (objfile
, n_syms
++);
8324 memset (sym
, 0, sizeof (struct symbol
));
8326 /* Cache this symbol's name and the name's demangled form (if any). */
8327 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8328 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
8330 /* Default assumptions.
8331 Use the passed type or decode it from the die. */
8332 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8333 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8335 SYMBOL_TYPE (sym
) = type
;
8337 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8338 attr
= dwarf2_attr (die
,
8339 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8343 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8346 attr
= dwarf2_attr (die
,
8347 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8351 int file_index
= DW_UNSND (attr
);
8352 if (cu
->line_header
== NULL
8353 || file_index
> cu
->line_header
->num_file_names
)
8354 complaint (&symfile_complaints
,
8355 _("file index out of range"));
8356 else if (file_index
> 0)
8358 struct file_entry
*fe
;
8359 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8360 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8367 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8370 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8372 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8374 case DW_TAG_subprogram
:
8375 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8377 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8378 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8379 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8380 || cu
->language
== language_ada
)
8382 /* Subprograms marked external are stored as a global symbol.
8383 Ada subprograms, whether marked external or not, are always
8384 stored as a global symbol, because we want to be able to
8385 access them globally. For instance, we want to be able
8386 to break on a nested subprogram without having to
8387 specify the context. */
8388 add_symbol_to_list (sym
, &global_symbols
);
8392 add_symbol_to_list (sym
, cu
->list_in_scope
);
8395 case DW_TAG_inlined_subroutine
:
8396 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8398 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8399 SYMBOL_INLINED (sym
) = 1;
8400 /* Do not add the symbol to any lists. It will be found via
8401 BLOCK_FUNCTION from the blockvector. */
8403 case DW_TAG_variable
:
8404 /* Compilation with minimal debug info may result in variables
8405 with missing type entries. Change the misleading `void' type
8406 to something sensible. */
8407 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8409 = objfile_type (objfile
)->nodebug_data_symbol
;
8411 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8414 dwarf2_const_value (attr
, sym
, cu
);
8415 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8416 if (attr2
&& (DW_UNSND (attr2
) != 0))
8417 add_symbol_to_list (sym
, &global_symbols
);
8419 add_symbol_to_list (sym
, cu
->list_in_scope
);
8422 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8425 var_decode_location (attr
, sym
, cu
);
8426 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8427 if (attr2
&& (DW_UNSND (attr2
) != 0))
8428 add_symbol_to_list (sym
, &global_symbols
);
8430 add_symbol_to_list (sym
, cu
->list_in_scope
);
8434 /* We do not know the address of this symbol.
8435 If it is an external symbol and we have type information
8436 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8437 The address of the variable will then be determined from
8438 the minimal symbol table whenever the variable is
8440 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8441 if (attr2
&& (DW_UNSND (attr2
) != 0)
8442 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8444 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8445 add_symbol_to_list (sym
, cu
->list_in_scope
);
8447 else if (!die_is_declaration (die
, cu
))
8449 /* Use the default LOC_OPTIMIZED_OUT class. */
8450 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8451 add_symbol_to_list (sym
, cu
->list_in_scope
);
8455 case DW_TAG_formal_parameter
:
8456 /* If we are inside a function, mark this as an argument. If
8457 not, we might be looking at an argument to an inlined function
8458 when we do not have enough information to show inlined frames;
8459 pretend it's a local variable in that case so that the user can
8461 if (context_stack_depth
> 0
8462 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8463 SYMBOL_IS_ARGUMENT (sym
) = 1;
8464 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8467 var_decode_location (attr
, sym
, cu
);
8469 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8472 dwarf2_const_value (attr
, sym
, cu
);
8474 add_symbol_to_list (sym
, cu
->list_in_scope
);
8476 case DW_TAG_unspecified_parameters
:
8477 /* From varargs functions; gdb doesn't seem to have any
8478 interest in this information, so just ignore it for now.
8481 case DW_TAG_class_type
:
8482 case DW_TAG_interface_type
:
8483 case DW_TAG_structure_type
:
8484 case DW_TAG_union_type
:
8485 case DW_TAG_set_type
:
8486 case DW_TAG_enumeration_type
:
8487 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8488 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8490 /* Make sure that the symbol includes appropriate enclosing
8491 classes/namespaces in its name. These are calculated in
8492 read_structure_type, and the correct name is saved in
8495 if (cu
->language
== language_cplus
8496 || cu
->language
== language_java
)
8498 struct type
*type
= SYMBOL_TYPE (sym
);
8500 if (TYPE_TAG_NAME (type
) != NULL
)
8502 /* FIXME: carlton/2003-11-10: Should this use
8503 SYMBOL_SET_NAMES instead? (The same problem also
8504 arises further down in this function.) */
8505 /* The type's name is already allocated along with
8506 this objfile, so we don't need to duplicate it
8508 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8513 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8514 really ever be static objects: otherwise, if you try
8515 to, say, break of a class's method and you're in a file
8516 which doesn't mention that class, it won't work unless
8517 the check for all static symbols in lookup_symbol_aux
8518 saves you. See the OtherFileClass tests in
8519 gdb.c++/namespace.exp. */
8521 struct pending
**list_to_add
;
8523 list_to_add
= (cu
->list_in_scope
== &file_symbols
8524 && (cu
->language
== language_cplus
8525 || cu
->language
== language_java
)
8526 ? &global_symbols
: cu
->list_in_scope
);
8528 add_symbol_to_list (sym
, list_to_add
);
8530 /* The semantics of C++ state that "struct foo { ... }" also
8531 defines a typedef for "foo". A Java class declaration also
8532 defines a typedef for the class. */
8533 if (cu
->language
== language_cplus
8534 || cu
->language
== language_java
8535 || cu
->language
== language_ada
)
8537 /* The symbol's name is already allocated along with
8538 this objfile, so we don't need to duplicate it for
8540 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8541 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8545 case DW_TAG_typedef
:
8546 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8547 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8548 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8549 add_symbol_to_list (sym
, cu
->list_in_scope
);
8551 case DW_TAG_base_type
:
8552 case DW_TAG_subrange_type
:
8553 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8554 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8555 add_symbol_to_list (sym
, cu
->list_in_scope
);
8557 case DW_TAG_enumerator
:
8558 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8559 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8562 dwarf2_const_value (attr
, sym
, cu
);
8565 /* NOTE: carlton/2003-11-10: See comment above in the
8566 DW_TAG_class_type, etc. block. */
8568 struct pending
**list_to_add
;
8570 list_to_add
= (cu
->list_in_scope
== &file_symbols
8571 && (cu
->language
== language_cplus
8572 || cu
->language
== language_java
)
8573 ? &global_symbols
: cu
->list_in_scope
);
8575 add_symbol_to_list (sym
, list_to_add
);
8578 case DW_TAG_namespace
:
8579 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8580 add_symbol_to_list (sym
, &global_symbols
);
8583 /* Not a tag we recognize. Hopefully we aren't processing
8584 trash data, but since we must specifically ignore things
8585 we don't recognize, there is nothing else we should do at
8587 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8588 dwarf_tag_name (die
->tag
));
8592 /* For the benefit of old versions of GCC, check for anonymous
8593 namespaces based on the demangled name. */
8594 if (!processing_has_namespace_info
8595 && cu
->language
== language_cplus
8596 && dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
) != NULL
)
8597 cp_scan_for_anonymous_namespaces (sym
);
8602 /* Copy constant value from an attribute to a symbol. */
8605 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8606 struct dwarf2_cu
*cu
)
8608 struct objfile
*objfile
= cu
->objfile
;
8609 struct comp_unit_head
*cu_header
= &cu
->header
;
8610 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8611 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8612 struct dwarf_block
*blk
;
8617 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8618 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8619 cu_header
->addr_size
,
8620 TYPE_LENGTH (SYMBOL_TYPE
8622 SYMBOL_VALUE_BYTES (sym
) =
8623 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8624 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8625 it's body - store_unsigned_integer. */
8626 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8627 byte_order
, DW_ADDR (attr
));
8628 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8630 case DW_FORM_string
:
8632 /* DW_STRING is already allocated on the obstack, point directly
8634 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8635 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8637 case DW_FORM_block1
:
8638 case DW_FORM_block2
:
8639 case DW_FORM_block4
:
8641 blk
= DW_BLOCK (attr
);
8642 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8643 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8645 TYPE_LENGTH (SYMBOL_TYPE
8647 SYMBOL_VALUE_BYTES (sym
) =
8648 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8649 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8650 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8653 /* The DW_AT_const_value attributes are supposed to carry the
8654 symbol's value "represented as it would be on the target
8655 architecture." By the time we get here, it's already been
8656 converted to host endianness, so we just need to sign- or
8657 zero-extend it as appropriate. */
8659 dwarf2_const_value_data (attr
, sym
, 8);
8662 dwarf2_const_value_data (attr
, sym
, 16);
8665 dwarf2_const_value_data (attr
, sym
, 32);
8668 dwarf2_const_value_data (attr
, sym
, 64);
8672 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8673 SYMBOL_CLASS (sym
) = LOC_CONST
;
8677 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8678 SYMBOL_CLASS (sym
) = LOC_CONST
;
8682 complaint (&symfile_complaints
,
8683 _("unsupported const value attribute form: '%s'"),
8684 dwarf_form_name (attr
->form
));
8685 SYMBOL_VALUE (sym
) = 0;
8686 SYMBOL_CLASS (sym
) = LOC_CONST
;
8692 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8693 or zero-extend it as appropriate for the symbol's type. */
8695 dwarf2_const_value_data (struct attribute
*attr
,
8699 LONGEST l
= DW_UNSND (attr
);
8701 if (bits
< sizeof (l
) * 8)
8703 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8704 l
&= ((LONGEST
) 1 << bits
) - 1;
8706 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8709 SYMBOL_VALUE (sym
) = l
;
8710 SYMBOL_CLASS (sym
) = LOC_CONST
;
8714 /* Return the type of the die in question using its DW_AT_type attribute. */
8716 static struct type
*
8717 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8720 struct attribute
*type_attr
;
8721 struct die_info
*type_die
;
8723 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8726 /* A missing DW_AT_type represents a void type. */
8727 return objfile_type (cu
->objfile
)->builtin_void
;
8730 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8732 type
= tag_type_to_type (type_die
, cu
);
8735 dump_die_for_error (type_die
);
8736 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8742 /* Return the containing type of the die in question using its
8743 DW_AT_containing_type attribute. */
8745 static struct type
*
8746 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8748 struct type
*type
= NULL
;
8749 struct attribute
*type_attr
;
8750 struct die_info
*type_die
= NULL
;
8752 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8755 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8756 type
= tag_type_to_type (type_die
, cu
);
8761 dump_die_for_error (type_die
);
8762 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8768 static struct type
*
8769 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8771 struct type
*this_type
;
8773 this_type
= read_type_die (die
, cu
);
8776 dump_die_for_error (die
);
8777 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8783 static struct type
*
8784 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8786 struct type
*this_type
;
8788 this_type
= get_die_type (die
, cu
);
8794 case DW_TAG_class_type
:
8795 case DW_TAG_interface_type
:
8796 case DW_TAG_structure_type
:
8797 case DW_TAG_union_type
:
8798 this_type
= read_structure_type (die
, cu
);
8800 case DW_TAG_enumeration_type
:
8801 this_type
= read_enumeration_type (die
, cu
);
8803 case DW_TAG_subprogram
:
8804 case DW_TAG_subroutine_type
:
8805 case DW_TAG_inlined_subroutine
:
8806 this_type
= read_subroutine_type (die
, cu
);
8808 case DW_TAG_array_type
:
8809 this_type
= read_array_type (die
, cu
);
8811 case DW_TAG_set_type
:
8812 this_type
= read_set_type (die
, cu
);
8814 case DW_TAG_pointer_type
:
8815 this_type
= read_tag_pointer_type (die
, cu
);
8817 case DW_TAG_ptr_to_member_type
:
8818 this_type
= read_tag_ptr_to_member_type (die
, cu
);
8820 case DW_TAG_reference_type
:
8821 this_type
= read_tag_reference_type (die
, cu
);
8823 case DW_TAG_const_type
:
8824 this_type
= read_tag_const_type (die
, cu
);
8826 case DW_TAG_volatile_type
:
8827 this_type
= read_tag_volatile_type (die
, cu
);
8829 case DW_TAG_string_type
:
8830 this_type
= read_tag_string_type (die
, cu
);
8832 case DW_TAG_typedef
:
8833 this_type
= read_typedef (die
, cu
);
8835 case DW_TAG_subrange_type
:
8836 this_type
= read_subrange_type (die
, cu
);
8838 case DW_TAG_base_type
:
8839 this_type
= read_base_type (die
, cu
);
8841 case DW_TAG_unspecified_type
:
8842 this_type
= read_unspecified_type (die
, cu
);
8844 case DW_TAG_namespace
:
8845 this_type
= read_namespace_type (die
, cu
);
8848 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
8849 dwarf_tag_name (die
->tag
));
8856 /* Return the name of the namespace/class that DIE is defined within,
8857 or "" if we can't tell. The caller should not xfree the result.
8859 For example, if we're within the method foo() in the following
8869 then determine_prefix on foo's die will return "N::C". */
8872 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
8874 struct die_info
*parent
, *spec_die
;
8875 struct dwarf2_cu
*spec_cu
;
8876 struct type
*parent_type
;
8878 if (cu
->language
!= language_cplus
8879 && cu
->language
!= language_java
)
8882 /* We have to be careful in the presence of DW_AT_specification.
8883 For example, with GCC 3.4, given the code
8887 // Definition of N::foo.
8891 then we'll have a tree of DIEs like this:
8893 1: DW_TAG_compile_unit
8894 2: DW_TAG_namespace // N
8895 3: DW_TAG_subprogram // declaration of N::foo
8896 4: DW_TAG_subprogram // definition of N::foo
8897 DW_AT_specification // refers to die #3
8899 Thus, when processing die #4, we have to pretend that we're in
8900 the context of its DW_AT_specification, namely the contex of die
8903 spec_die
= die_specification (die
, &spec_cu
);
8904 if (spec_die
== NULL
)
8905 parent
= die
->parent
;
8908 parent
= spec_die
->parent
;
8915 switch (parent
->tag
)
8917 case DW_TAG_namespace
:
8918 parent_type
= read_type_die (parent
, cu
);
8919 /* We give a name to even anonymous namespaces. */
8920 return TYPE_TAG_NAME (parent_type
);
8921 case DW_TAG_class_type
:
8922 case DW_TAG_interface_type
:
8923 case DW_TAG_structure_type
:
8924 case DW_TAG_union_type
:
8925 parent_type
= read_type_die (parent
, cu
);
8926 if (TYPE_TAG_NAME (parent_type
) != NULL
)
8927 return TYPE_TAG_NAME (parent_type
);
8929 /* An anonymous structure is only allowed non-static data
8930 members; no typedefs, no member functions, et cetera.
8931 So it does not need a prefix. */
8934 return determine_prefix (parent
, cu
);
8938 /* Return a newly-allocated string formed by concatenating PREFIX and
8939 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8940 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8941 perform an obconcat, otherwise allocate storage for the result. The CU argument
8942 is used to determine the language and hence, the appropriate separator. */
8944 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8947 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
8948 struct dwarf2_cu
*cu
)
8952 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
8954 else if (cu
->language
== language_java
)
8966 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
8967 strcpy (retval
, prefix
);
8968 strcat (retval
, sep
);
8969 strcat (retval
, suffix
);
8974 /* We have an obstack. */
8975 return obconcat (obs
, prefix
, sep
, suffix
);
8979 /* Return sibling of die, NULL if no sibling. */
8981 static struct die_info
*
8982 sibling_die (struct die_info
*die
)
8984 return die
->sibling
;
8987 /* Get linkage name of a die, return NULL if not found. */
8990 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8992 struct attribute
*attr
;
8994 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8995 if (attr
&& DW_STRING (attr
))
8996 return DW_STRING (attr
);
8997 return dwarf2_name (die
, cu
);
9000 /* Get name of a die, return NULL if not found. */
9003 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9004 struct obstack
*obstack
)
9006 if (name
&& cu
->language
== language_cplus
)
9008 char *canon_name
= cp_canonicalize_string (name
);
9010 if (canon_name
!= NULL
)
9012 if (strcmp (canon_name
, name
) != 0)
9013 name
= obsavestring (canon_name
, strlen (canon_name
),
9022 /* Get name of a die, return NULL if not found. */
9025 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9027 struct attribute
*attr
;
9029 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9030 if (!attr
|| !DW_STRING (attr
))
9035 case DW_TAG_compile_unit
:
9036 /* Compilation units have a DW_AT_name that is a filename, not
9037 a source language identifier. */
9038 case DW_TAG_enumeration_type
:
9039 case DW_TAG_enumerator
:
9040 /* These tags always have simple identifiers already; no need
9041 to canonicalize them. */
9042 return DW_STRING (attr
);
9044 if (!DW_STRING_IS_CANONICAL (attr
))
9047 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9048 &cu
->objfile
->objfile_obstack
);
9049 DW_STRING_IS_CANONICAL (attr
) = 1;
9051 return DW_STRING (attr
);
9055 /* Return the die that this die in an extension of, or NULL if there
9056 is none. *EXT_CU is the CU containing DIE on input, and the CU
9057 containing the return value on output. */
9059 static struct die_info
*
9060 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9062 struct attribute
*attr
;
9064 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9068 return follow_die_ref (die
, attr
, ext_cu
);
9071 /* Convert a DIE tag into its string name. */
9074 dwarf_tag_name (unsigned tag
)
9078 case DW_TAG_padding
:
9079 return "DW_TAG_padding";
9080 case DW_TAG_array_type
:
9081 return "DW_TAG_array_type";
9082 case DW_TAG_class_type
:
9083 return "DW_TAG_class_type";
9084 case DW_TAG_entry_point
:
9085 return "DW_TAG_entry_point";
9086 case DW_TAG_enumeration_type
:
9087 return "DW_TAG_enumeration_type";
9088 case DW_TAG_formal_parameter
:
9089 return "DW_TAG_formal_parameter";
9090 case DW_TAG_imported_declaration
:
9091 return "DW_TAG_imported_declaration";
9093 return "DW_TAG_label";
9094 case DW_TAG_lexical_block
:
9095 return "DW_TAG_lexical_block";
9097 return "DW_TAG_member";
9098 case DW_TAG_pointer_type
:
9099 return "DW_TAG_pointer_type";
9100 case DW_TAG_reference_type
:
9101 return "DW_TAG_reference_type";
9102 case DW_TAG_compile_unit
:
9103 return "DW_TAG_compile_unit";
9104 case DW_TAG_string_type
:
9105 return "DW_TAG_string_type";
9106 case DW_TAG_structure_type
:
9107 return "DW_TAG_structure_type";
9108 case DW_TAG_subroutine_type
:
9109 return "DW_TAG_subroutine_type";
9110 case DW_TAG_typedef
:
9111 return "DW_TAG_typedef";
9112 case DW_TAG_union_type
:
9113 return "DW_TAG_union_type";
9114 case DW_TAG_unspecified_parameters
:
9115 return "DW_TAG_unspecified_parameters";
9116 case DW_TAG_variant
:
9117 return "DW_TAG_variant";
9118 case DW_TAG_common_block
:
9119 return "DW_TAG_common_block";
9120 case DW_TAG_common_inclusion
:
9121 return "DW_TAG_common_inclusion";
9122 case DW_TAG_inheritance
:
9123 return "DW_TAG_inheritance";
9124 case DW_TAG_inlined_subroutine
:
9125 return "DW_TAG_inlined_subroutine";
9127 return "DW_TAG_module";
9128 case DW_TAG_ptr_to_member_type
:
9129 return "DW_TAG_ptr_to_member_type";
9130 case DW_TAG_set_type
:
9131 return "DW_TAG_set_type";
9132 case DW_TAG_subrange_type
:
9133 return "DW_TAG_subrange_type";
9134 case DW_TAG_with_stmt
:
9135 return "DW_TAG_with_stmt";
9136 case DW_TAG_access_declaration
:
9137 return "DW_TAG_access_declaration";
9138 case DW_TAG_base_type
:
9139 return "DW_TAG_base_type";
9140 case DW_TAG_catch_block
:
9141 return "DW_TAG_catch_block";
9142 case DW_TAG_const_type
:
9143 return "DW_TAG_const_type";
9144 case DW_TAG_constant
:
9145 return "DW_TAG_constant";
9146 case DW_TAG_enumerator
:
9147 return "DW_TAG_enumerator";
9148 case DW_TAG_file_type
:
9149 return "DW_TAG_file_type";
9151 return "DW_TAG_friend";
9152 case DW_TAG_namelist
:
9153 return "DW_TAG_namelist";
9154 case DW_TAG_namelist_item
:
9155 return "DW_TAG_namelist_item";
9156 case DW_TAG_packed_type
:
9157 return "DW_TAG_packed_type";
9158 case DW_TAG_subprogram
:
9159 return "DW_TAG_subprogram";
9160 case DW_TAG_template_type_param
:
9161 return "DW_TAG_template_type_param";
9162 case DW_TAG_template_value_param
:
9163 return "DW_TAG_template_value_param";
9164 case DW_TAG_thrown_type
:
9165 return "DW_TAG_thrown_type";
9166 case DW_TAG_try_block
:
9167 return "DW_TAG_try_block";
9168 case DW_TAG_variant_part
:
9169 return "DW_TAG_variant_part";
9170 case DW_TAG_variable
:
9171 return "DW_TAG_variable";
9172 case DW_TAG_volatile_type
:
9173 return "DW_TAG_volatile_type";
9174 case DW_TAG_dwarf_procedure
:
9175 return "DW_TAG_dwarf_procedure";
9176 case DW_TAG_restrict_type
:
9177 return "DW_TAG_restrict_type";
9178 case DW_TAG_interface_type
:
9179 return "DW_TAG_interface_type";
9180 case DW_TAG_namespace
:
9181 return "DW_TAG_namespace";
9182 case DW_TAG_imported_module
:
9183 return "DW_TAG_imported_module";
9184 case DW_TAG_unspecified_type
:
9185 return "DW_TAG_unspecified_type";
9186 case DW_TAG_partial_unit
:
9187 return "DW_TAG_partial_unit";
9188 case DW_TAG_imported_unit
:
9189 return "DW_TAG_imported_unit";
9190 case DW_TAG_condition
:
9191 return "DW_TAG_condition";
9192 case DW_TAG_shared_type
:
9193 return "DW_TAG_shared_type";
9194 case DW_TAG_type_unit
:
9195 return "DW_TAG_type_unit";
9196 case DW_TAG_MIPS_loop
:
9197 return "DW_TAG_MIPS_loop";
9198 case DW_TAG_HP_array_descriptor
:
9199 return "DW_TAG_HP_array_descriptor";
9200 case DW_TAG_format_label
:
9201 return "DW_TAG_format_label";
9202 case DW_TAG_function_template
:
9203 return "DW_TAG_function_template";
9204 case DW_TAG_class_template
:
9205 return "DW_TAG_class_template";
9206 case DW_TAG_GNU_BINCL
:
9207 return "DW_TAG_GNU_BINCL";
9208 case DW_TAG_GNU_EINCL
:
9209 return "DW_TAG_GNU_EINCL";
9210 case DW_TAG_upc_shared_type
:
9211 return "DW_TAG_upc_shared_type";
9212 case DW_TAG_upc_strict_type
:
9213 return "DW_TAG_upc_strict_type";
9214 case DW_TAG_upc_relaxed_type
:
9215 return "DW_TAG_upc_relaxed_type";
9216 case DW_TAG_PGI_kanji_type
:
9217 return "DW_TAG_PGI_kanji_type";
9218 case DW_TAG_PGI_interface_block
:
9219 return "DW_TAG_PGI_interface_block";
9221 return "DW_TAG_<unknown>";
9225 /* Convert a DWARF attribute code into its string name. */
9228 dwarf_attr_name (unsigned attr
)
9233 return "DW_AT_sibling";
9234 case DW_AT_location
:
9235 return "DW_AT_location";
9237 return "DW_AT_name";
9238 case DW_AT_ordering
:
9239 return "DW_AT_ordering";
9240 case DW_AT_subscr_data
:
9241 return "DW_AT_subscr_data";
9242 case DW_AT_byte_size
:
9243 return "DW_AT_byte_size";
9244 case DW_AT_bit_offset
:
9245 return "DW_AT_bit_offset";
9246 case DW_AT_bit_size
:
9247 return "DW_AT_bit_size";
9248 case DW_AT_element_list
:
9249 return "DW_AT_element_list";
9250 case DW_AT_stmt_list
:
9251 return "DW_AT_stmt_list";
9253 return "DW_AT_low_pc";
9255 return "DW_AT_high_pc";
9256 case DW_AT_language
:
9257 return "DW_AT_language";
9259 return "DW_AT_member";
9261 return "DW_AT_discr";
9262 case DW_AT_discr_value
:
9263 return "DW_AT_discr_value";
9264 case DW_AT_visibility
:
9265 return "DW_AT_visibility";
9267 return "DW_AT_import";
9268 case DW_AT_string_length
:
9269 return "DW_AT_string_length";
9270 case DW_AT_common_reference
:
9271 return "DW_AT_common_reference";
9272 case DW_AT_comp_dir
:
9273 return "DW_AT_comp_dir";
9274 case DW_AT_const_value
:
9275 return "DW_AT_const_value";
9276 case DW_AT_containing_type
:
9277 return "DW_AT_containing_type";
9278 case DW_AT_default_value
:
9279 return "DW_AT_default_value";
9281 return "DW_AT_inline";
9282 case DW_AT_is_optional
:
9283 return "DW_AT_is_optional";
9284 case DW_AT_lower_bound
:
9285 return "DW_AT_lower_bound";
9286 case DW_AT_producer
:
9287 return "DW_AT_producer";
9288 case DW_AT_prototyped
:
9289 return "DW_AT_prototyped";
9290 case DW_AT_return_addr
:
9291 return "DW_AT_return_addr";
9292 case DW_AT_start_scope
:
9293 return "DW_AT_start_scope";
9294 case DW_AT_bit_stride
:
9295 return "DW_AT_bit_stride";
9296 case DW_AT_upper_bound
:
9297 return "DW_AT_upper_bound";
9298 case DW_AT_abstract_origin
:
9299 return "DW_AT_abstract_origin";
9300 case DW_AT_accessibility
:
9301 return "DW_AT_accessibility";
9302 case DW_AT_address_class
:
9303 return "DW_AT_address_class";
9304 case DW_AT_artificial
:
9305 return "DW_AT_artificial";
9306 case DW_AT_base_types
:
9307 return "DW_AT_base_types";
9308 case DW_AT_calling_convention
:
9309 return "DW_AT_calling_convention";
9311 return "DW_AT_count";
9312 case DW_AT_data_member_location
:
9313 return "DW_AT_data_member_location";
9314 case DW_AT_decl_column
:
9315 return "DW_AT_decl_column";
9316 case DW_AT_decl_file
:
9317 return "DW_AT_decl_file";
9318 case DW_AT_decl_line
:
9319 return "DW_AT_decl_line";
9320 case DW_AT_declaration
:
9321 return "DW_AT_declaration";
9322 case DW_AT_discr_list
:
9323 return "DW_AT_discr_list";
9324 case DW_AT_encoding
:
9325 return "DW_AT_encoding";
9326 case DW_AT_external
:
9327 return "DW_AT_external";
9328 case DW_AT_frame_base
:
9329 return "DW_AT_frame_base";
9331 return "DW_AT_friend";
9332 case DW_AT_identifier_case
:
9333 return "DW_AT_identifier_case";
9334 case DW_AT_macro_info
:
9335 return "DW_AT_macro_info";
9336 case DW_AT_namelist_items
:
9337 return "DW_AT_namelist_items";
9338 case DW_AT_priority
:
9339 return "DW_AT_priority";
9341 return "DW_AT_segment";
9342 case DW_AT_specification
:
9343 return "DW_AT_specification";
9344 case DW_AT_static_link
:
9345 return "DW_AT_static_link";
9347 return "DW_AT_type";
9348 case DW_AT_use_location
:
9349 return "DW_AT_use_location";
9350 case DW_AT_variable_parameter
:
9351 return "DW_AT_variable_parameter";
9352 case DW_AT_virtuality
:
9353 return "DW_AT_virtuality";
9354 case DW_AT_vtable_elem_location
:
9355 return "DW_AT_vtable_elem_location";
9356 /* DWARF 3 values. */
9357 case DW_AT_allocated
:
9358 return "DW_AT_allocated";
9359 case DW_AT_associated
:
9360 return "DW_AT_associated";
9361 case DW_AT_data_location
:
9362 return "DW_AT_data_location";
9363 case DW_AT_byte_stride
:
9364 return "DW_AT_byte_stride";
9365 case DW_AT_entry_pc
:
9366 return "DW_AT_entry_pc";
9367 case DW_AT_use_UTF8
:
9368 return "DW_AT_use_UTF8";
9369 case DW_AT_extension
:
9370 return "DW_AT_extension";
9372 return "DW_AT_ranges";
9373 case DW_AT_trampoline
:
9374 return "DW_AT_trampoline";
9375 case DW_AT_call_column
:
9376 return "DW_AT_call_column";
9377 case DW_AT_call_file
:
9378 return "DW_AT_call_file";
9379 case DW_AT_call_line
:
9380 return "DW_AT_call_line";
9381 case DW_AT_description
:
9382 return "DW_AT_description";
9383 case DW_AT_binary_scale
:
9384 return "DW_AT_binary_scale";
9385 case DW_AT_decimal_scale
:
9386 return "DW_AT_decimal_scale";
9388 return "DW_AT_small";
9389 case DW_AT_decimal_sign
:
9390 return "DW_AT_decimal_sign";
9391 case DW_AT_digit_count
:
9392 return "DW_AT_digit_count";
9393 case DW_AT_picture_string
:
9394 return "DW_AT_picture_string";
9396 return "DW_AT_mutable";
9397 case DW_AT_threads_scaled
:
9398 return "DW_AT_threads_scaled";
9399 case DW_AT_explicit
:
9400 return "DW_AT_explicit";
9401 case DW_AT_object_pointer
:
9402 return "DW_AT_object_pointer";
9403 case DW_AT_endianity
:
9404 return "DW_AT_endianity";
9405 case DW_AT_elemental
:
9406 return "DW_AT_elemental";
9408 return "DW_AT_pure";
9409 case DW_AT_recursive
:
9410 return "DW_AT_recursive";
9411 /* DWARF 4 values. */
9412 case DW_AT_signature
:
9413 return "DW_AT_signature";
9414 /* SGI/MIPS extensions. */
9415 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9416 case DW_AT_MIPS_fde
:
9417 return "DW_AT_MIPS_fde";
9419 case DW_AT_MIPS_loop_begin
:
9420 return "DW_AT_MIPS_loop_begin";
9421 case DW_AT_MIPS_tail_loop_begin
:
9422 return "DW_AT_MIPS_tail_loop_begin";
9423 case DW_AT_MIPS_epilog_begin
:
9424 return "DW_AT_MIPS_epilog_begin";
9425 case DW_AT_MIPS_loop_unroll_factor
:
9426 return "DW_AT_MIPS_loop_unroll_factor";
9427 case DW_AT_MIPS_software_pipeline_depth
:
9428 return "DW_AT_MIPS_software_pipeline_depth";
9429 case DW_AT_MIPS_linkage_name
:
9430 return "DW_AT_MIPS_linkage_name";
9431 case DW_AT_MIPS_stride
:
9432 return "DW_AT_MIPS_stride";
9433 case DW_AT_MIPS_abstract_name
:
9434 return "DW_AT_MIPS_abstract_name";
9435 case DW_AT_MIPS_clone_origin
:
9436 return "DW_AT_MIPS_clone_origin";
9437 case DW_AT_MIPS_has_inlines
:
9438 return "DW_AT_MIPS_has_inlines";
9439 /* HP extensions. */
9440 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9441 case DW_AT_HP_block_index
:
9442 return "DW_AT_HP_block_index";
9444 case DW_AT_HP_unmodifiable
:
9445 return "DW_AT_HP_unmodifiable";
9446 case DW_AT_HP_actuals_stmt_list
:
9447 return "DW_AT_HP_actuals_stmt_list";
9448 case DW_AT_HP_proc_per_section
:
9449 return "DW_AT_HP_proc_per_section";
9450 case DW_AT_HP_raw_data_ptr
:
9451 return "DW_AT_HP_raw_data_ptr";
9452 case DW_AT_HP_pass_by_reference
:
9453 return "DW_AT_HP_pass_by_reference";
9454 case DW_AT_HP_opt_level
:
9455 return "DW_AT_HP_opt_level";
9456 case DW_AT_HP_prof_version_id
:
9457 return "DW_AT_HP_prof_version_id";
9458 case DW_AT_HP_opt_flags
:
9459 return "DW_AT_HP_opt_flags";
9460 case DW_AT_HP_cold_region_low_pc
:
9461 return "DW_AT_HP_cold_region_low_pc";
9462 case DW_AT_HP_cold_region_high_pc
:
9463 return "DW_AT_HP_cold_region_high_pc";
9464 case DW_AT_HP_all_variables_modifiable
:
9465 return "DW_AT_HP_all_variables_modifiable";
9466 case DW_AT_HP_linkage_name
:
9467 return "DW_AT_HP_linkage_name";
9468 case DW_AT_HP_prof_flags
:
9469 return "DW_AT_HP_prof_flags";
9470 /* GNU extensions. */
9471 case DW_AT_sf_names
:
9472 return "DW_AT_sf_names";
9473 case DW_AT_src_info
:
9474 return "DW_AT_src_info";
9475 case DW_AT_mac_info
:
9476 return "DW_AT_mac_info";
9477 case DW_AT_src_coords
:
9478 return "DW_AT_src_coords";
9479 case DW_AT_body_begin
:
9480 return "DW_AT_body_begin";
9481 case DW_AT_body_end
:
9482 return "DW_AT_body_end";
9483 case DW_AT_GNU_vector
:
9484 return "DW_AT_GNU_vector";
9485 /* VMS extensions. */
9486 case DW_AT_VMS_rtnbeg_pd_address
:
9487 return "DW_AT_VMS_rtnbeg_pd_address";
9488 /* UPC extension. */
9489 case DW_AT_upc_threads_scaled
:
9490 return "DW_AT_upc_threads_scaled";
9491 /* PGI (STMicroelectronics) extensions. */
9492 case DW_AT_PGI_lbase
:
9493 return "DW_AT_PGI_lbase";
9494 case DW_AT_PGI_soffset
:
9495 return "DW_AT_PGI_soffset";
9496 case DW_AT_PGI_lstride
:
9497 return "DW_AT_PGI_lstride";
9499 return "DW_AT_<unknown>";
9503 /* Convert a DWARF value form code into its string name. */
9506 dwarf_form_name (unsigned form
)
9511 return "DW_FORM_addr";
9512 case DW_FORM_block2
:
9513 return "DW_FORM_block2";
9514 case DW_FORM_block4
:
9515 return "DW_FORM_block4";
9517 return "DW_FORM_data2";
9519 return "DW_FORM_data4";
9521 return "DW_FORM_data8";
9522 case DW_FORM_string
:
9523 return "DW_FORM_string";
9525 return "DW_FORM_block";
9526 case DW_FORM_block1
:
9527 return "DW_FORM_block1";
9529 return "DW_FORM_data1";
9531 return "DW_FORM_flag";
9533 return "DW_FORM_sdata";
9535 return "DW_FORM_strp";
9537 return "DW_FORM_udata";
9538 case DW_FORM_ref_addr
:
9539 return "DW_FORM_ref_addr";
9541 return "DW_FORM_ref1";
9543 return "DW_FORM_ref2";
9545 return "DW_FORM_ref4";
9547 return "DW_FORM_ref8";
9548 case DW_FORM_ref_udata
:
9549 return "DW_FORM_ref_udata";
9550 case DW_FORM_indirect
:
9551 return "DW_FORM_indirect";
9552 case DW_FORM_sec_offset
:
9553 return "DW_FORM_sec_offset";
9554 case DW_FORM_exprloc
:
9555 return "DW_FORM_exprloc";
9556 case DW_FORM_flag_present
:
9557 return "DW_FORM_flag_present";
9559 return "DW_FORM_sig8";
9561 return "DW_FORM_<unknown>";
9565 /* Convert a DWARF stack opcode into its string name. */
9568 dwarf_stack_op_name (unsigned op
)
9573 return "DW_OP_addr";
9575 return "DW_OP_deref";
9577 return "DW_OP_const1u";
9579 return "DW_OP_const1s";
9581 return "DW_OP_const2u";
9583 return "DW_OP_const2s";
9585 return "DW_OP_const4u";
9587 return "DW_OP_const4s";
9589 return "DW_OP_const8u";
9591 return "DW_OP_const8s";
9593 return "DW_OP_constu";
9595 return "DW_OP_consts";
9599 return "DW_OP_drop";
9601 return "DW_OP_over";
9603 return "DW_OP_pick";
9605 return "DW_OP_swap";
9609 return "DW_OP_xderef";
9617 return "DW_OP_minus";
9629 return "DW_OP_plus";
9630 case DW_OP_plus_uconst
:
9631 return "DW_OP_plus_uconst";
9637 return "DW_OP_shra";
9655 return "DW_OP_skip";
9657 return "DW_OP_lit0";
9659 return "DW_OP_lit1";
9661 return "DW_OP_lit2";
9663 return "DW_OP_lit3";
9665 return "DW_OP_lit4";
9667 return "DW_OP_lit5";
9669 return "DW_OP_lit6";
9671 return "DW_OP_lit7";
9673 return "DW_OP_lit8";
9675 return "DW_OP_lit9";
9677 return "DW_OP_lit10";
9679 return "DW_OP_lit11";
9681 return "DW_OP_lit12";
9683 return "DW_OP_lit13";
9685 return "DW_OP_lit14";
9687 return "DW_OP_lit15";
9689 return "DW_OP_lit16";
9691 return "DW_OP_lit17";
9693 return "DW_OP_lit18";
9695 return "DW_OP_lit19";
9697 return "DW_OP_lit20";
9699 return "DW_OP_lit21";
9701 return "DW_OP_lit22";
9703 return "DW_OP_lit23";
9705 return "DW_OP_lit24";
9707 return "DW_OP_lit25";
9709 return "DW_OP_lit26";
9711 return "DW_OP_lit27";
9713 return "DW_OP_lit28";
9715 return "DW_OP_lit29";
9717 return "DW_OP_lit30";
9719 return "DW_OP_lit31";
9721 return "DW_OP_reg0";
9723 return "DW_OP_reg1";
9725 return "DW_OP_reg2";
9727 return "DW_OP_reg3";
9729 return "DW_OP_reg4";
9731 return "DW_OP_reg5";
9733 return "DW_OP_reg6";
9735 return "DW_OP_reg7";
9737 return "DW_OP_reg8";
9739 return "DW_OP_reg9";
9741 return "DW_OP_reg10";
9743 return "DW_OP_reg11";
9745 return "DW_OP_reg12";
9747 return "DW_OP_reg13";
9749 return "DW_OP_reg14";
9751 return "DW_OP_reg15";
9753 return "DW_OP_reg16";
9755 return "DW_OP_reg17";
9757 return "DW_OP_reg18";
9759 return "DW_OP_reg19";
9761 return "DW_OP_reg20";
9763 return "DW_OP_reg21";
9765 return "DW_OP_reg22";
9767 return "DW_OP_reg23";
9769 return "DW_OP_reg24";
9771 return "DW_OP_reg25";
9773 return "DW_OP_reg26";
9775 return "DW_OP_reg27";
9777 return "DW_OP_reg28";
9779 return "DW_OP_reg29";
9781 return "DW_OP_reg30";
9783 return "DW_OP_reg31";
9785 return "DW_OP_breg0";
9787 return "DW_OP_breg1";
9789 return "DW_OP_breg2";
9791 return "DW_OP_breg3";
9793 return "DW_OP_breg4";
9795 return "DW_OP_breg5";
9797 return "DW_OP_breg6";
9799 return "DW_OP_breg7";
9801 return "DW_OP_breg8";
9803 return "DW_OP_breg9";
9805 return "DW_OP_breg10";
9807 return "DW_OP_breg11";
9809 return "DW_OP_breg12";
9811 return "DW_OP_breg13";
9813 return "DW_OP_breg14";
9815 return "DW_OP_breg15";
9817 return "DW_OP_breg16";
9819 return "DW_OP_breg17";
9821 return "DW_OP_breg18";
9823 return "DW_OP_breg19";
9825 return "DW_OP_breg20";
9827 return "DW_OP_breg21";
9829 return "DW_OP_breg22";
9831 return "DW_OP_breg23";
9833 return "DW_OP_breg24";
9835 return "DW_OP_breg25";
9837 return "DW_OP_breg26";
9839 return "DW_OP_breg27";
9841 return "DW_OP_breg28";
9843 return "DW_OP_breg29";
9845 return "DW_OP_breg30";
9847 return "DW_OP_breg31";
9849 return "DW_OP_regx";
9851 return "DW_OP_fbreg";
9853 return "DW_OP_bregx";
9855 return "DW_OP_piece";
9856 case DW_OP_deref_size
:
9857 return "DW_OP_deref_size";
9858 case DW_OP_xderef_size
:
9859 return "DW_OP_xderef_size";
9862 /* DWARF 3 extensions. */
9863 case DW_OP_push_object_address
:
9864 return "DW_OP_push_object_address";
9866 return "DW_OP_call2";
9868 return "DW_OP_call4";
9869 case DW_OP_call_ref
:
9870 return "DW_OP_call_ref";
9871 /* GNU extensions. */
9872 case DW_OP_form_tls_address
:
9873 return "DW_OP_form_tls_address";
9874 case DW_OP_call_frame_cfa
:
9875 return "DW_OP_call_frame_cfa";
9876 case DW_OP_bit_piece
:
9877 return "DW_OP_bit_piece";
9878 case DW_OP_GNU_push_tls_address
:
9879 return "DW_OP_GNU_push_tls_address";
9880 case DW_OP_GNU_uninit
:
9881 return "DW_OP_GNU_uninit";
9882 /* HP extensions. */
9883 case DW_OP_HP_is_value
:
9884 return "DW_OP_HP_is_value";
9885 case DW_OP_HP_fltconst4
:
9886 return "DW_OP_HP_fltconst4";
9887 case DW_OP_HP_fltconst8
:
9888 return "DW_OP_HP_fltconst8";
9889 case DW_OP_HP_mod_range
:
9890 return "DW_OP_HP_mod_range";
9891 case DW_OP_HP_unmod_range
:
9892 return "DW_OP_HP_unmod_range";
9894 return "DW_OP_HP_tls";
9896 return "OP_<unknown>";
9901 dwarf_bool_name (unsigned mybool
)
9909 /* Convert a DWARF type code into its string name. */
9912 dwarf_type_encoding_name (unsigned enc
)
9917 return "DW_ATE_void";
9918 case DW_ATE_address
:
9919 return "DW_ATE_address";
9920 case DW_ATE_boolean
:
9921 return "DW_ATE_boolean";
9922 case DW_ATE_complex_float
:
9923 return "DW_ATE_complex_float";
9925 return "DW_ATE_float";
9927 return "DW_ATE_signed";
9928 case DW_ATE_signed_char
:
9929 return "DW_ATE_signed_char";
9930 case DW_ATE_unsigned
:
9931 return "DW_ATE_unsigned";
9932 case DW_ATE_unsigned_char
:
9933 return "DW_ATE_unsigned_char";
9935 case DW_ATE_imaginary_float
:
9936 return "DW_ATE_imaginary_float";
9937 case DW_ATE_packed_decimal
:
9938 return "DW_ATE_packed_decimal";
9939 case DW_ATE_numeric_string
:
9940 return "DW_ATE_numeric_string";
9942 return "DW_ATE_edited";
9943 case DW_ATE_signed_fixed
:
9944 return "DW_ATE_signed_fixed";
9945 case DW_ATE_unsigned_fixed
:
9946 return "DW_ATE_unsigned_fixed";
9947 case DW_ATE_decimal_float
:
9948 return "DW_ATE_decimal_float";
9949 /* HP extensions. */
9950 case DW_ATE_HP_float80
:
9951 return "DW_ATE_HP_float80";
9952 case DW_ATE_HP_complex_float80
:
9953 return "DW_ATE_HP_complex_float80";
9954 case DW_ATE_HP_float128
:
9955 return "DW_ATE_HP_float128";
9956 case DW_ATE_HP_complex_float128
:
9957 return "DW_ATE_HP_complex_float128";
9958 case DW_ATE_HP_floathpintel
:
9959 return "DW_ATE_HP_floathpintel";
9960 case DW_ATE_HP_imaginary_float80
:
9961 return "DW_ATE_HP_imaginary_float80";
9962 case DW_ATE_HP_imaginary_float128
:
9963 return "DW_ATE_HP_imaginary_float128";
9965 return "DW_ATE_<unknown>";
9969 /* Convert a DWARF call frame info operation to its string name. */
9973 dwarf_cfi_name (unsigned cfi_opc
)
9977 case DW_CFA_advance_loc
:
9978 return "DW_CFA_advance_loc";
9980 return "DW_CFA_offset";
9981 case DW_CFA_restore
:
9982 return "DW_CFA_restore";
9984 return "DW_CFA_nop";
9985 case DW_CFA_set_loc
:
9986 return "DW_CFA_set_loc";
9987 case DW_CFA_advance_loc1
:
9988 return "DW_CFA_advance_loc1";
9989 case DW_CFA_advance_loc2
:
9990 return "DW_CFA_advance_loc2";
9991 case DW_CFA_advance_loc4
:
9992 return "DW_CFA_advance_loc4";
9993 case DW_CFA_offset_extended
:
9994 return "DW_CFA_offset_extended";
9995 case DW_CFA_restore_extended
:
9996 return "DW_CFA_restore_extended";
9997 case DW_CFA_undefined
:
9998 return "DW_CFA_undefined";
9999 case DW_CFA_same_value
:
10000 return "DW_CFA_same_value";
10001 case DW_CFA_register
:
10002 return "DW_CFA_register";
10003 case DW_CFA_remember_state
:
10004 return "DW_CFA_remember_state";
10005 case DW_CFA_restore_state
:
10006 return "DW_CFA_restore_state";
10007 case DW_CFA_def_cfa
:
10008 return "DW_CFA_def_cfa";
10009 case DW_CFA_def_cfa_register
:
10010 return "DW_CFA_def_cfa_register";
10011 case DW_CFA_def_cfa_offset
:
10012 return "DW_CFA_def_cfa_offset";
10014 case DW_CFA_def_cfa_expression
:
10015 return "DW_CFA_def_cfa_expression";
10016 case DW_CFA_expression
:
10017 return "DW_CFA_expression";
10018 case DW_CFA_offset_extended_sf
:
10019 return "DW_CFA_offset_extended_sf";
10020 case DW_CFA_def_cfa_sf
:
10021 return "DW_CFA_def_cfa_sf";
10022 case DW_CFA_def_cfa_offset_sf
:
10023 return "DW_CFA_def_cfa_offset_sf";
10024 case DW_CFA_val_offset
:
10025 return "DW_CFA_val_offset";
10026 case DW_CFA_val_offset_sf
:
10027 return "DW_CFA_val_offset_sf";
10028 case DW_CFA_val_expression
:
10029 return "DW_CFA_val_expression";
10030 /* SGI/MIPS specific. */
10031 case DW_CFA_MIPS_advance_loc8
:
10032 return "DW_CFA_MIPS_advance_loc8";
10033 /* GNU extensions. */
10034 case DW_CFA_GNU_window_save
:
10035 return "DW_CFA_GNU_window_save";
10036 case DW_CFA_GNU_args_size
:
10037 return "DW_CFA_GNU_args_size";
10038 case DW_CFA_GNU_negative_offset_extended
:
10039 return "DW_CFA_GNU_negative_offset_extended";
10041 return "DW_CFA_<unknown>";
10047 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10051 print_spaces (indent
, f
);
10052 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10053 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10055 if (die
->parent
!= NULL
)
10057 print_spaces (indent
, f
);
10058 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10059 die
->parent
->offset
);
10062 print_spaces (indent
, f
);
10063 fprintf_unfiltered (f
, " has children: %s\n",
10064 dwarf_bool_name (die
->child
!= NULL
));
10066 print_spaces (indent
, f
);
10067 fprintf_unfiltered (f
, " attributes:\n");
10069 for (i
= 0; i
< die
->num_attrs
; ++i
)
10071 print_spaces (indent
, f
);
10072 fprintf_unfiltered (f
, " %s (%s) ",
10073 dwarf_attr_name (die
->attrs
[i
].name
),
10074 dwarf_form_name (die
->attrs
[i
].form
));
10076 switch (die
->attrs
[i
].form
)
10078 case DW_FORM_ref_addr
:
10080 fprintf_unfiltered (f
, "address: ");
10081 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10083 case DW_FORM_block2
:
10084 case DW_FORM_block4
:
10085 case DW_FORM_block
:
10086 case DW_FORM_block1
:
10087 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10092 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10093 (long) (DW_ADDR (&die
->attrs
[i
])));
10095 case DW_FORM_data1
:
10096 case DW_FORM_data2
:
10097 case DW_FORM_data4
:
10098 case DW_FORM_data8
:
10099 case DW_FORM_udata
:
10100 case DW_FORM_sdata
:
10101 fprintf_unfiltered (f
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
10104 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10105 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10106 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10108 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10110 case DW_FORM_string
:
10112 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10113 DW_STRING (&die
->attrs
[i
])
10114 ? DW_STRING (&die
->attrs
[i
]) : "",
10115 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10118 if (DW_UNSND (&die
->attrs
[i
]))
10119 fprintf_unfiltered (f
, "flag: TRUE");
10121 fprintf_unfiltered (f
, "flag: FALSE");
10123 case DW_FORM_indirect
:
10124 /* the reader will have reduced the indirect form to
10125 the "base form" so this form should not occur */
10126 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10129 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10130 die
->attrs
[i
].form
);
10133 fprintf_unfiltered (f
, "\n");
10138 dump_die_for_error (struct die_info
*die
)
10140 dump_die_shallow (gdb_stderr
, 0, die
);
10144 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10146 int indent
= level
* 4;
10148 gdb_assert (die
!= NULL
);
10150 if (level
>= max_level
)
10153 dump_die_shallow (f
, indent
, die
);
10155 if (die
->child
!= NULL
)
10157 print_spaces (indent
, f
);
10158 fprintf_unfiltered (f
, " Children:");
10159 if (level
+ 1 < max_level
)
10161 fprintf_unfiltered (f
, "\n");
10162 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10166 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10170 if (die
->sibling
!= NULL
&& level
> 0)
10172 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10176 /* This is called from the pdie macro in gdbinit.in.
10177 It's not static so gcc will keep a copy callable from gdb. */
10180 dump_die (struct die_info
*die
, int max_level
)
10182 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10186 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10190 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10196 is_ref_attr (struct attribute
*attr
)
10198 switch (attr
->form
)
10200 case DW_FORM_ref_addr
:
10205 case DW_FORM_ref_udata
:
10212 static unsigned int
10213 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10215 if (is_ref_attr (attr
))
10216 return DW_ADDR (attr
);
10218 complaint (&symfile_complaints
,
10219 _("unsupported die ref attribute form: '%s'"),
10220 dwarf_form_name (attr
->form
));
10224 /* Return the constant value held by the given attribute. Return -1
10225 if the value held by the attribute is not constant. */
10228 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10230 if (attr
->form
== DW_FORM_sdata
)
10231 return DW_SND (attr
);
10232 else if (attr
->form
== DW_FORM_udata
10233 || attr
->form
== DW_FORM_data1
10234 || attr
->form
== DW_FORM_data2
10235 || attr
->form
== DW_FORM_data4
10236 || attr
->form
== DW_FORM_data8
)
10237 return DW_UNSND (attr
);
10240 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10241 dwarf_form_name (attr
->form
));
10242 return default_value
;
10246 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10247 unit and add it to our queue.
10248 The result is non-zero if PER_CU was queued, otherwise the result is zero
10249 meaning either PER_CU is already queued or it is already loaded. */
10252 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10253 struct dwarf2_per_cu_data
*per_cu
)
10255 /* Mark the dependence relation so that we don't flush PER_CU
10257 dwarf2_add_dependence (this_cu
, per_cu
);
10259 /* If it's already on the queue, we have nothing to do. */
10260 if (per_cu
->queued
)
10263 /* If the compilation unit is already loaded, just mark it as
10265 if (per_cu
->cu
!= NULL
)
10267 per_cu
->cu
->last_used
= 0;
10271 /* Add it to the queue. */
10272 queue_comp_unit (per_cu
, this_cu
->objfile
);
10277 /* Follow reference or signature attribute ATTR of SRC_DIE.
10278 On entry *REF_CU is the CU of SRC_DIE.
10279 On exit *REF_CU is the CU of the result. */
10281 static struct die_info
*
10282 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10283 struct dwarf2_cu
**ref_cu
)
10285 struct die_info
*die
;
10287 if (is_ref_attr (attr
))
10288 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10289 else if (attr
->form
== DW_FORM_sig8
)
10290 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10293 dump_die_for_error (src_die
);
10294 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10295 (*ref_cu
)->objfile
->name
);
10301 /* Follow reference attribute ATTR of SRC_DIE.
10302 On entry *REF_CU is the CU of SRC_DIE.
10303 On exit *REF_CU is the CU of the result. */
10305 static struct die_info
*
10306 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10307 struct dwarf2_cu
**ref_cu
)
10309 struct die_info
*die
;
10310 unsigned int offset
;
10311 struct die_info temp_die
;
10312 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10314 gdb_assert (cu
->per_cu
!= NULL
);
10316 offset
= dwarf2_get_ref_die_offset (attr
);
10318 if (cu
->per_cu
->from_debug_types
)
10320 /* .debug_types CUs cannot reference anything outside their CU.
10321 If they need to, they have to reference a signatured type via
10323 if (! offset_in_cu_p (&cu
->header
, offset
))
10327 else if (! offset_in_cu_p (&cu
->header
, offset
))
10329 struct dwarf2_per_cu_data
*per_cu
;
10330 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10332 /* If necessary, add it to the queue and load its DIEs. */
10333 if (maybe_queue_comp_unit (cu
, per_cu
))
10334 load_full_comp_unit (per_cu
, cu
->objfile
);
10336 target_cu
= per_cu
->cu
;
10341 *ref_cu
= target_cu
;
10342 temp_die
.offset
= offset
;
10343 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10349 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10350 "at 0x%x [in module %s]"),
10351 offset
, src_die
->offset
, cu
->objfile
->name
);
10354 /* Follow the signature attribute ATTR in SRC_DIE.
10355 On entry *REF_CU is the CU of SRC_DIE.
10356 On exit *REF_CU is the CU of the result. */
10358 static struct die_info
*
10359 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10360 struct dwarf2_cu
**ref_cu
)
10362 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10363 struct die_info temp_die
;
10364 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10365 struct dwarf2_cu
*sig_cu
;
10366 struct die_info
*die
;
10368 /* sig_type will be NULL if the signatured type is missing from
10370 if (sig_type
== NULL
)
10371 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10372 "at 0x%x [in module %s]"),
10373 src_die
->offset
, objfile
->name
);
10375 /* If necessary, add it to the queue and load its DIEs. */
10377 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10378 read_signatured_type (objfile
, sig_type
);
10380 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10382 sig_cu
= sig_type
->per_cu
.cu
;
10383 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10384 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10391 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10392 "at 0x%x [in module %s]"),
10393 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10396 /* Given an offset of a signatured type, return its signatured_type. */
10398 static struct signatured_type
*
10399 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10401 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10402 unsigned int length
, initial_length_size
;
10403 unsigned int sig_offset
;
10404 struct signatured_type find_entry
, *type_sig
;
10406 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10407 sig_offset
= (initial_length_size
10409 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10410 + 1 /*address_size*/);
10411 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10412 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10414 /* This is only used to lookup previously recorded types.
10415 If we didn't find it, it's our bug. */
10416 gdb_assert (type_sig
!= NULL
);
10417 gdb_assert (offset
== type_sig
->offset
);
10422 /* Read in signatured type at OFFSET and build its CU and die(s). */
10425 read_signatured_type_at_offset (struct objfile
*objfile
,
10426 unsigned int offset
)
10428 struct signatured_type
*type_sig
;
10430 /* We have the section offset, but we need the signature to do the
10431 hash table lookup. */
10432 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10434 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10436 read_signatured_type (objfile
, type_sig
);
10438 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10441 /* Read in a signatured type and build its CU and DIEs. */
10444 read_signatured_type (struct objfile
*objfile
,
10445 struct signatured_type
*type_sig
)
10447 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10448 struct die_reader_specs reader_specs
;
10449 struct dwarf2_cu
*cu
;
10450 ULONGEST signature
;
10451 struct cleanup
*back_to
, *free_cu_cleanup
;
10452 struct attribute
*attr
;
10454 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10456 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10457 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10458 obstack_init (&cu
->comp_unit_obstack
);
10459 cu
->objfile
= objfile
;
10460 type_sig
->per_cu
.cu
= cu
;
10461 cu
->per_cu
= &type_sig
->per_cu
;
10463 /* If an error occurs while loading, release our storage. */
10464 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10466 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10467 types_ptr
, objfile
->obfd
);
10468 gdb_assert (signature
== type_sig
->signature
);
10471 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10475 &cu
->comp_unit_obstack
,
10476 hashtab_obstack_allocate
,
10477 dummy_obstack_deallocate
);
10479 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10480 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10482 init_cu_die_reader (&reader_specs
, cu
);
10484 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10487 /* We try not to read any attributes in this function, because not
10488 all objfiles needed for references have been loaded yet, and symbol
10489 table processing isn't initialized. But we have to set the CU language,
10490 or we won't be able to build types correctly. */
10491 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10493 set_cu_language (DW_UNSND (attr
), cu
);
10495 set_cu_language (language_minimal
, cu
);
10497 do_cleanups (back_to
);
10499 /* We've successfully allocated this compilation unit. Let our caller
10500 clean it up when finished with it. */
10501 discard_cleanups (free_cu_cleanup
);
10503 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10504 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10507 /* Decode simple location descriptions.
10508 Given a pointer to a dwarf block that defines a location, compute
10509 the location and return the value.
10511 NOTE drow/2003-11-18: This function is called in two situations
10512 now: for the address of static or global variables (partial symbols
10513 only) and for offsets into structures which are expected to be
10514 (more or less) constant. The partial symbol case should go away,
10515 and only the constant case should remain. That will let this
10516 function complain more accurately. A few special modes are allowed
10517 without complaint for global variables (for instance, global
10518 register values and thread-local values).
10520 A location description containing no operations indicates that the
10521 object is optimized out. The return value is 0 for that case.
10522 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10523 callers will only want a very basic result and this can become a
10526 Note that stack[0] is unused except as a default error return.
10527 Note that stack overflow is not yet handled. */
10530 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10532 struct objfile
*objfile
= cu
->objfile
;
10533 struct comp_unit_head
*cu_header
= &cu
->header
;
10535 int size
= blk
->size
;
10536 gdb_byte
*data
= blk
->data
;
10537 CORE_ADDR stack
[64];
10539 unsigned int bytes_read
, unsnd
;
10583 stack
[++stacki
] = op
- DW_OP_lit0
;
10618 stack
[++stacki
] = op
- DW_OP_reg0
;
10620 dwarf2_complex_location_expr_complaint ();
10624 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10626 stack
[++stacki
] = unsnd
;
10628 dwarf2_complex_location_expr_complaint ();
10632 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10637 case DW_OP_const1u
:
10638 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10642 case DW_OP_const1s
:
10643 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10647 case DW_OP_const2u
:
10648 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10652 case DW_OP_const2s
:
10653 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10657 case DW_OP_const4u
:
10658 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10662 case DW_OP_const4s
:
10663 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10668 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10674 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10679 stack
[stacki
+ 1] = stack
[stacki
];
10684 stack
[stacki
- 1] += stack
[stacki
];
10688 case DW_OP_plus_uconst
:
10689 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10694 stack
[stacki
- 1] -= stack
[stacki
];
10699 /* If we're not the last op, then we definitely can't encode
10700 this using GDB's address_class enum. This is valid for partial
10701 global symbols, although the variable's address will be bogus
10704 dwarf2_complex_location_expr_complaint ();
10707 case DW_OP_GNU_push_tls_address
:
10708 /* The top of the stack has the offset from the beginning
10709 of the thread control block at which the variable is located. */
10710 /* Nothing should follow this operator, so the top of stack would
10712 /* This is valid for partial global symbols, but the variable's
10713 address will be bogus in the psymtab. */
10715 dwarf2_complex_location_expr_complaint ();
10718 case DW_OP_GNU_uninit
:
10722 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
10723 dwarf_stack_op_name (op
));
10724 return (stack
[stacki
]);
10727 return (stack
[stacki
]);
10730 /* memory allocation interface */
10732 static struct dwarf_block
*
10733 dwarf_alloc_block (struct dwarf2_cu
*cu
)
10735 struct dwarf_block
*blk
;
10737 blk
= (struct dwarf_block
*)
10738 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
10742 static struct abbrev_info
*
10743 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
10745 struct abbrev_info
*abbrev
;
10747 abbrev
= (struct abbrev_info
*)
10748 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
10749 memset (abbrev
, 0, sizeof (struct abbrev_info
));
10753 static struct die_info
*
10754 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
10756 struct die_info
*die
;
10757 size_t size
= sizeof (struct die_info
);
10760 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
10762 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
10763 memset (die
, 0, sizeof (struct die_info
));
10768 /* Macro support. */
10771 /* Return the full name of file number I in *LH's file name table.
10772 Use COMP_DIR as the name of the current directory of the
10773 compilation. The result is allocated using xmalloc; the caller is
10774 responsible for freeing it. */
10776 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
10778 /* Is the file number a valid index into the line header's file name
10779 table? Remember that file numbers start with one, not zero. */
10780 if (1 <= file
&& file
<= lh
->num_file_names
)
10782 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10784 if (IS_ABSOLUTE_PATH (fe
->name
))
10785 return xstrdup (fe
->name
);
10793 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10799 dir_len
= strlen (dir
);
10800 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
10801 strcpy (full_name
, dir
);
10802 full_name
[dir_len
] = '/';
10803 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
10807 return xstrdup (fe
->name
);
10812 /* The compiler produced a bogus file number. We can at least
10813 record the macro definitions made in the file, even if we
10814 won't be able to find the file by name. */
10815 char fake_name
[80];
10816 sprintf (fake_name
, "<bad macro file number %d>", file
);
10818 complaint (&symfile_complaints
,
10819 _("bad file number in macro information (%d)"),
10822 return xstrdup (fake_name
);
10827 static struct macro_source_file
*
10828 macro_start_file (int file
, int line
,
10829 struct macro_source_file
*current_file
,
10830 const char *comp_dir
,
10831 struct line_header
*lh
, struct objfile
*objfile
)
10833 /* The full name of this source file. */
10834 char *full_name
= file_full_name (file
, lh
, comp_dir
);
10836 /* We don't create a macro table for this compilation unit
10837 at all until we actually get a filename. */
10838 if (! pending_macros
)
10839 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
10840 objfile
->macro_cache
);
10842 if (! current_file
)
10843 /* If we have no current file, then this must be the start_file
10844 directive for the compilation unit's main source file. */
10845 current_file
= macro_set_main (pending_macros
, full_name
);
10847 current_file
= macro_include (current_file
, line
, full_name
);
10851 return current_file
;
10855 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10856 followed by a null byte. */
10858 copy_string (const char *buf
, int len
)
10860 char *s
= xmalloc (len
+ 1);
10861 memcpy (s
, buf
, len
);
10868 static const char *
10869 consume_improper_spaces (const char *p
, const char *body
)
10873 complaint (&symfile_complaints
,
10874 _("macro definition contains spaces in formal argument list:\n`%s'"),
10886 parse_macro_definition (struct macro_source_file
*file
, int line
,
10891 /* The body string takes one of two forms. For object-like macro
10892 definitions, it should be:
10894 <macro name> " " <definition>
10896 For function-like macro definitions, it should be:
10898 <macro name> "() " <definition>
10900 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10902 Spaces may appear only where explicitly indicated, and in the
10905 The Dwarf 2 spec says that an object-like macro's name is always
10906 followed by a space, but versions of GCC around March 2002 omit
10907 the space when the macro's definition is the empty string.
10909 The Dwarf 2 spec says that there should be no spaces between the
10910 formal arguments in a function-like macro's formal argument list,
10911 but versions of GCC around March 2002 include spaces after the
10915 /* Find the extent of the macro name. The macro name is terminated
10916 by either a space or null character (for an object-like macro) or
10917 an opening paren (for a function-like macro). */
10918 for (p
= body
; *p
; p
++)
10919 if (*p
== ' ' || *p
== '(')
10922 if (*p
== ' ' || *p
== '\0')
10924 /* It's an object-like macro. */
10925 int name_len
= p
- body
;
10926 char *name
= copy_string (body
, name_len
);
10927 const char *replacement
;
10930 replacement
= body
+ name_len
+ 1;
10933 dwarf2_macro_malformed_definition_complaint (body
);
10934 replacement
= body
+ name_len
;
10937 macro_define_object (file
, line
, name
, replacement
);
10941 else if (*p
== '(')
10943 /* It's a function-like macro. */
10944 char *name
= copy_string (body
, p
- body
);
10947 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
10951 p
= consume_improper_spaces (p
, body
);
10953 /* Parse the formal argument list. */
10954 while (*p
&& *p
!= ')')
10956 /* Find the extent of the current argument name. */
10957 const char *arg_start
= p
;
10959 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
10962 if (! *p
|| p
== arg_start
)
10963 dwarf2_macro_malformed_definition_complaint (body
);
10966 /* Make sure argv has room for the new argument. */
10967 if (argc
>= argv_size
)
10970 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
10973 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
10976 p
= consume_improper_spaces (p
, body
);
10978 /* Consume the comma, if present. */
10983 p
= consume_improper_spaces (p
, body
);
10992 /* Perfectly formed definition, no complaints. */
10993 macro_define_function (file
, line
, name
,
10994 argc
, (const char **) argv
,
10996 else if (*p
== '\0')
10998 /* Complain, but do define it. */
10999 dwarf2_macro_malformed_definition_complaint (body
);
11000 macro_define_function (file
, line
, name
,
11001 argc
, (const char **) argv
,
11005 /* Just complain. */
11006 dwarf2_macro_malformed_definition_complaint (body
);
11009 /* Just complain. */
11010 dwarf2_macro_malformed_definition_complaint (body
);
11016 for (i
= 0; i
< argc
; i
++)
11022 dwarf2_macro_malformed_definition_complaint (body
);
11027 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11028 char *comp_dir
, bfd
*abfd
,
11029 struct dwarf2_cu
*cu
)
11031 gdb_byte
*mac_ptr
, *mac_end
;
11032 struct macro_source_file
*current_file
= 0;
11033 enum dwarf_macinfo_record_type macinfo_type
;
11034 int at_commandline
;
11036 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11038 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11042 /* First pass: Find the name of the base filename.
11043 This filename is needed in order to process all macros whose definition
11044 (or undefinition) comes from the command line. These macros are defined
11045 before the first DW_MACINFO_start_file entry, and yet still need to be
11046 associated to the base file.
11048 To determine the base file name, we scan the macro definitions until we
11049 reach the first DW_MACINFO_start_file entry. We then initialize
11050 CURRENT_FILE accordingly so that any macro definition found before the
11051 first DW_MACINFO_start_file can still be associated to the base file. */
11053 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11054 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11055 + dwarf2_per_objfile
->macinfo
.size
;
11059 /* Do we at least have room for a macinfo type byte? */
11060 if (mac_ptr
>= mac_end
)
11062 /* Complaint is printed during the second pass as GDB will probably
11063 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11067 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11070 switch (macinfo_type
)
11072 /* A zero macinfo type indicates the end of the macro
11077 case DW_MACINFO_define
:
11078 case DW_MACINFO_undef
:
11079 /* Only skip the data by MAC_PTR. */
11081 unsigned int bytes_read
;
11083 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11084 mac_ptr
+= bytes_read
;
11085 read_string (abfd
, mac_ptr
, &bytes_read
);
11086 mac_ptr
+= bytes_read
;
11090 case DW_MACINFO_start_file
:
11092 unsigned int bytes_read
;
11095 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11096 mac_ptr
+= bytes_read
;
11097 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11098 mac_ptr
+= bytes_read
;
11100 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11105 case DW_MACINFO_end_file
:
11106 /* No data to skip by MAC_PTR. */
11109 case DW_MACINFO_vendor_ext
:
11110 /* Only skip the data by MAC_PTR. */
11112 unsigned int bytes_read
;
11114 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11115 mac_ptr
+= bytes_read
;
11116 read_string (abfd
, mac_ptr
, &bytes_read
);
11117 mac_ptr
+= bytes_read
;
11124 } while (macinfo_type
!= 0 && current_file
== NULL
);
11126 /* Second pass: Process all entries.
11128 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11129 command-line macro definitions/undefinitions. This flag is unset when we
11130 reach the first DW_MACINFO_start_file entry. */
11132 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11134 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11135 GDB is still reading the definitions from command line. First
11136 DW_MACINFO_start_file will need to be ignored as it was already executed
11137 to create CURRENT_FILE for the main source holding also the command line
11138 definitions. On first met DW_MACINFO_start_file this flag is reset to
11139 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11141 at_commandline
= 1;
11145 /* Do we at least have room for a macinfo type byte? */
11146 if (mac_ptr
>= mac_end
)
11148 dwarf2_macros_too_long_complaint ();
11152 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11155 switch (macinfo_type
)
11157 /* A zero macinfo type indicates the end of the macro
11162 case DW_MACINFO_define
:
11163 case DW_MACINFO_undef
:
11165 unsigned int bytes_read
;
11169 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11170 mac_ptr
+= bytes_read
;
11171 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11172 mac_ptr
+= bytes_read
;
11174 if (! current_file
)
11176 /* DWARF violation as no main source is present. */
11177 complaint (&symfile_complaints
,
11178 _("debug info with no main source gives macro %s "
11180 macinfo_type
== DW_MACINFO_define
?
11182 macinfo_type
== DW_MACINFO_undef
?
11183 _("undefinition") :
11184 _("something-or-other"), line
, body
);
11187 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11188 complaint (&symfile_complaints
,
11189 _("debug info gives %s macro %s with %s line %d: %s"),
11190 at_commandline
? _("command-line") : _("in-file"),
11191 macinfo_type
== DW_MACINFO_define
?
11193 macinfo_type
== DW_MACINFO_undef
?
11194 _("undefinition") :
11195 _("something-or-other"),
11196 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11198 if (macinfo_type
== DW_MACINFO_define
)
11199 parse_macro_definition (current_file
, line
, body
);
11200 else if (macinfo_type
== DW_MACINFO_undef
)
11201 macro_undef (current_file
, line
, body
);
11205 case DW_MACINFO_start_file
:
11207 unsigned int bytes_read
;
11210 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11211 mac_ptr
+= bytes_read
;
11212 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11213 mac_ptr
+= bytes_read
;
11215 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11216 complaint (&symfile_complaints
,
11217 _("debug info gives source %d included "
11218 "from %s at %s line %d"),
11219 file
, at_commandline
? _("command-line") : _("file"),
11220 line
== 0 ? _("zero") : _("non-zero"), line
);
11222 if (at_commandline
)
11224 /* This DW_MACINFO_start_file was executed in the pass one. */
11225 at_commandline
= 0;
11228 current_file
= macro_start_file (file
, line
,
11229 current_file
, comp_dir
,
11234 case DW_MACINFO_end_file
:
11235 if (! current_file
)
11236 complaint (&symfile_complaints
,
11237 _("macro debug info has an unmatched `close_file' directive"));
11240 current_file
= current_file
->included_by
;
11241 if (! current_file
)
11243 enum dwarf_macinfo_record_type next_type
;
11245 /* GCC circa March 2002 doesn't produce the zero
11246 type byte marking the end of the compilation
11247 unit. Complain if it's not there, but exit no
11250 /* Do we at least have room for a macinfo type byte? */
11251 if (mac_ptr
>= mac_end
)
11253 dwarf2_macros_too_long_complaint ();
11257 /* We don't increment mac_ptr here, so this is just
11259 next_type
= read_1_byte (abfd
, mac_ptr
);
11260 if (next_type
!= 0)
11261 complaint (&symfile_complaints
,
11262 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11269 case DW_MACINFO_vendor_ext
:
11271 unsigned int bytes_read
;
11275 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11276 mac_ptr
+= bytes_read
;
11277 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11278 mac_ptr
+= bytes_read
;
11280 /* We don't recognize any vendor extensions. */
11284 } while (macinfo_type
!= 0);
11287 /* Check if the attribute's form is a DW_FORM_block*
11288 if so return true else false. */
11290 attr_form_is_block (struct attribute
*attr
)
11292 return (attr
== NULL
? 0 :
11293 attr
->form
== DW_FORM_block1
11294 || attr
->form
== DW_FORM_block2
11295 || attr
->form
== DW_FORM_block4
11296 || attr
->form
== DW_FORM_block
);
11299 /* Return non-zero if ATTR's value is a section offset --- classes
11300 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11301 You may use DW_UNSND (attr) to retrieve such offsets.
11303 Section 7.5.4, "Attribute Encodings", explains that no attribute
11304 may have a value that belongs to more than one of these classes; it
11305 would be ambiguous if we did, because we use the same forms for all
11308 attr_form_is_section_offset (struct attribute
*attr
)
11310 return (attr
->form
== DW_FORM_data4
11311 || attr
->form
== DW_FORM_data8
);
11315 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11316 zero otherwise. When this function returns true, you can apply
11317 dwarf2_get_attr_constant_value to it.
11319 However, note that for some attributes you must check
11320 attr_form_is_section_offset before using this test. DW_FORM_data4
11321 and DW_FORM_data8 are members of both the constant class, and of
11322 the classes that contain offsets into other debug sections
11323 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11324 that, if an attribute's can be either a constant or one of the
11325 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11326 taken as section offsets, not constants. */
11328 attr_form_is_constant (struct attribute
*attr
)
11330 switch (attr
->form
)
11332 case DW_FORM_sdata
:
11333 case DW_FORM_udata
:
11334 case DW_FORM_data1
:
11335 case DW_FORM_data2
:
11336 case DW_FORM_data4
:
11337 case DW_FORM_data8
:
11345 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11346 struct dwarf2_cu
*cu
)
11348 if (attr_form_is_section_offset (attr
)
11349 /* ".debug_loc" may not exist at all, or the offset may be outside
11350 the section. If so, fall through to the complaint in the
11352 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11354 struct dwarf2_loclist_baton
*baton
;
11356 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11357 sizeof (struct dwarf2_loclist_baton
));
11358 baton
->per_cu
= cu
->per_cu
;
11359 gdb_assert (baton
->per_cu
);
11361 /* We don't know how long the location list is, but make sure we
11362 don't run off the edge of the section. */
11363 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11364 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11365 baton
->base_address
= cu
->base_address
;
11366 if (cu
->base_known
== 0)
11367 complaint (&symfile_complaints
,
11368 _("Location list used without specifying the CU base address."));
11370 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11371 SYMBOL_LOCATION_BATON (sym
) = baton
;
11375 struct dwarf2_locexpr_baton
*baton
;
11377 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11378 sizeof (struct dwarf2_locexpr_baton
));
11379 baton
->per_cu
= cu
->per_cu
;
11380 gdb_assert (baton
->per_cu
);
11382 if (attr_form_is_block (attr
))
11384 /* Note that we're just copying the block's data pointer
11385 here, not the actual data. We're still pointing into the
11386 info_buffer for SYM's objfile; right now we never release
11387 that buffer, but when we do clean up properly this may
11389 baton
->size
= DW_BLOCK (attr
)->size
;
11390 baton
->data
= DW_BLOCK (attr
)->data
;
11394 dwarf2_invalid_attrib_class_complaint ("location description",
11395 SYMBOL_NATURAL_NAME (sym
));
11397 baton
->data
= NULL
;
11400 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11401 SYMBOL_LOCATION_BATON (sym
) = baton
;
11405 /* Return the OBJFILE associated with the compilation unit CU. */
11408 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11410 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11412 /* Return the master objfile, so that we can report and look up the
11413 correct file containing this variable. */
11414 if (objfile
->separate_debug_objfile_backlink
)
11415 objfile
= objfile
->separate_debug_objfile_backlink
;
11420 /* Return the address size given in the compilation unit header for CU. */
11423 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11426 return per_cu
->cu
->header
.addr_size
;
11429 /* If the CU is not currently read in, we re-read its header. */
11430 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11431 struct dwarf2_per_objfile
*per_objfile
11432 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11433 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11435 struct comp_unit_head cu_header
;
11436 memset (&cu_header
, 0, sizeof cu_header
);
11437 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11438 return cu_header
.addr_size
;
11442 /* Locate the .debug_info compilation unit from CU's objfile which contains
11443 the DIE at OFFSET. Raises an error on failure. */
11445 static struct dwarf2_per_cu_data
*
11446 dwarf2_find_containing_comp_unit (unsigned int offset
,
11447 struct objfile
*objfile
)
11449 struct dwarf2_per_cu_data
*this_cu
;
11453 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11456 int mid
= low
+ (high
- low
) / 2;
11457 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11462 gdb_assert (low
== high
);
11463 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11466 error (_("Dwarf Error: could not find partial DIE containing "
11467 "offset 0x%lx [in module %s]"),
11468 (long) offset
, bfd_get_filename (objfile
->obfd
));
11470 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11471 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11475 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11476 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11477 && offset
>= this_cu
->offset
+ this_cu
->length
)
11478 error (_("invalid dwarf2 offset %u"), offset
);
11479 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11484 /* Locate the compilation unit from OBJFILE which is located at exactly
11485 OFFSET. Raises an error on failure. */
11487 static struct dwarf2_per_cu_data
*
11488 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11490 struct dwarf2_per_cu_data
*this_cu
;
11491 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11492 if (this_cu
->offset
!= offset
)
11493 error (_("no compilation unit with offset %u."), offset
);
11497 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11499 static struct dwarf2_cu
*
11500 alloc_one_comp_unit (struct objfile
*objfile
)
11502 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11503 cu
->objfile
= objfile
;
11504 obstack_init (&cu
->comp_unit_obstack
);
11508 /* Release one cached compilation unit, CU. We unlink it from the tree
11509 of compilation units, but we don't remove it from the read_in_chain;
11510 the caller is responsible for that.
11511 NOTE: DATA is a void * because this function is also used as a
11512 cleanup routine. */
11515 free_one_comp_unit (void *data
)
11517 struct dwarf2_cu
*cu
= data
;
11519 if (cu
->per_cu
!= NULL
)
11520 cu
->per_cu
->cu
= NULL
;
11523 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11528 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11529 when we're finished with it. We can't free the pointer itself, but be
11530 sure to unlink it from the cache. Also release any associated storage
11531 and perform cache maintenance.
11533 Only used during partial symbol parsing. */
11536 free_stack_comp_unit (void *data
)
11538 struct dwarf2_cu
*cu
= data
;
11540 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11541 cu
->partial_dies
= NULL
;
11543 if (cu
->per_cu
!= NULL
)
11545 /* This compilation unit is on the stack in our caller, so we
11546 should not xfree it. Just unlink it. */
11547 cu
->per_cu
->cu
= NULL
;
11550 /* If we had a per-cu pointer, then we may have other compilation
11551 units loaded, so age them now. */
11552 age_cached_comp_units ();
11556 /* Free all cached compilation units. */
11559 free_cached_comp_units (void *data
)
11561 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11563 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11564 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11565 while (per_cu
!= NULL
)
11567 struct dwarf2_per_cu_data
*next_cu
;
11569 next_cu
= per_cu
->cu
->read_in_chain
;
11571 free_one_comp_unit (per_cu
->cu
);
11572 *last_chain
= next_cu
;
11578 /* Increase the age counter on each cached compilation unit, and free
11579 any that are too old. */
11582 age_cached_comp_units (void)
11584 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11586 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11587 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11588 while (per_cu
!= NULL
)
11590 per_cu
->cu
->last_used
++;
11591 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11592 dwarf2_mark (per_cu
->cu
);
11593 per_cu
= per_cu
->cu
->read_in_chain
;
11596 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11597 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11598 while (per_cu
!= NULL
)
11600 struct dwarf2_per_cu_data
*next_cu
;
11602 next_cu
= per_cu
->cu
->read_in_chain
;
11604 if (!per_cu
->cu
->mark
)
11606 free_one_comp_unit (per_cu
->cu
);
11607 *last_chain
= next_cu
;
11610 last_chain
= &per_cu
->cu
->read_in_chain
;
11616 /* Remove a single compilation unit from the cache. */
11619 free_one_cached_comp_unit (void *target_cu
)
11621 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11623 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11624 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11625 while (per_cu
!= NULL
)
11627 struct dwarf2_per_cu_data
*next_cu
;
11629 next_cu
= per_cu
->cu
->read_in_chain
;
11631 if (per_cu
->cu
== target_cu
)
11633 free_one_comp_unit (per_cu
->cu
);
11634 *last_chain
= next_cu
;
11638 last_chain
= &per_cu
->cu
->read_in_chain
;
11644 /* Release all extra memory associated with OBJFILE. */
11647 dwarf2_free_objfile (struct objfile
*objfile
)
11649 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11651 if (dwarf2_per_objfile
== NULL
)
11654 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11655 free_cached_comp_units (NULL
);
11657 /* Everything else should be on the objfile obstack. */
11660 /* A pair of DIE offset and GDB type pointer. We store these
11661 in a hash table separate from the DIEs, and preserve them
11662 when the DIEs are flushed out of cache. */
11664 struct dwarf2_offset_and_type
11666 unsigned int offset
;
11670 /* Hash function for a dwarf2_offset_and_type. */
11673 offset_and_type_hash (const void *item
)
11675 const struct dwarf2_offset_and_type
*ofs
= item
;
11676 return ofs
->offset
;
11679 /* Equality function for a dwarf2_offset_and_type. */
11682 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11684 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11685 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11686 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11689 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11690 table if necessary. For convenience, return TYPE. */
11692 static struct type
*
11693 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11695 struct dwarf2_offset_and_type
**slot
, ofs
;
11697 if (cu
->type_hash
== NULL
)
11699 gdb_assert (cu
->per_cu
!= NULL
);
11700 cu
->per_cu
->type_hash
11701 = htab_create_alloc_ex (cu
->header
.length
/ 24,
11702 offset_and_type_hash
,
11703 offset_and_type_eq
,
11705 &cu
->objfile
->objfile_obstack
,
11706 hashtab_obstack_allocate
,
11707 dummy_obstack_deallocate
);
11708 cu
->type_hash
= cu
->per_cu
->type_hash
;
11711 ofs
.offset
= die
->offset
;
11713 slot
= (struct dwarf2_offset_and_type
**)
11714 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
11715 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
11720 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11721 not have a saved type. */
11723 static struct type
*
11724 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11726 struct dwarf2_offset_and_type
*slot
, ofs
;
11727 htab_t type_hash
= cu
->type_hash
;
11729 if (type_hash
== NULL
)
11732 ofs
.offset
= die
->offset
;
11733 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
11740 /* Add a dependence relationship from CU to REF_PER_CU. */
11743 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
11744 struct dwarf2_per_cu_data
*ref_per_cu
)
11748 if (cu
->dependencies
== NULL
)
11750 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
11751 NULL
, &cu
->comp_unit_obstack
,
11752 hashtab_obstack_allocate
,
11753 dummy_obstack_deallocate
);
11755 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
11757 *slot
= ref_per_cu
;
11760 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11761 Set the mark field in every compilation unit in the
11762 cache that we must keep because we are keeping CU. */
11765 dwarf2_mark_helper (void **slot
, void *data
)
11767 struct dwarf2_per_cu_data
*per_cu
;
11769 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
11770 if (per_cu
->cu
->mark
)
11772 per_cu
->cu
->mark
= 1;
11774 if (per_cu
->cu
->dependencies
!= NULL
)
11775 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11780 /* Set the mark field in CU and in every other compilation unit in the
11781 cache that we must keep because we are keeping CU. */
11784 dwarf2_mark (struct dwarf2_cu
*cu
)
11789 if (cu
->dependencies
!= NULL
)
11790 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11794 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
11798 per_cu
->cu
->mark
= 0;
11799 per_cu
= per_cu
->cu
->read_in_chain
;
11803 /* Trivial hash function for partial_die_info: the hash value of a DIE
11804 is its offset in .debug_info for this objfile. */
11807 partial_die_hash (const void *item
)
11809 const struct partial_die_info
*part_die
= item
;
11810 return part_die
->offset
;
11813 /* Trivial comparison function for partial_die_info structures: two DIEs
11814 are equal if they have the same offset. */
11817 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
11819 const struct partial_die_info
*part_die_lhs
= item_lhs
;
11820 const struct partial_die_info
*part_die_rhs
= item_rhs
;
11821 return part_die_lhs
->offset
== part_die_rhs
->offset
;
11824 static struct cmd_list_element
*set_dwarf2_cmdlist
;
11825 static struct cmd_list_element
*show_dwarf2_cmdlist
;
11828 set_dwarf2_cmd (char *args
, int from_tty
)
11830 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
11834 show_dwarf2_cmd (char *args
, int from_tty
)
11836 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
11839 /* If section described by INFO was mmapped, munmap it now. */
11842 munmap_section_buffer (struct dwarf2_section_info
*info
)
11844 if (info
->was_mmapped
)
11847 intptr_t begin
= (intptr_t) info
->buffer
;
11848 intptr_t map_begin
= begin
& ~(pagesize
- 1);
11849 size_t map_length
= info
->size
+ begin
- map_begin
;
11850 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
11852 /* Without HAVE_MMAP, we should never be here to begin with. */
11858 /* munmap debug sections for OBJFILE, if necessary. */
11861 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
11863 struct dwarf2_per_objfile
*data
= d
;
11864 munmap_section_buffer (&data
->info
);
11865 munmap_section_buffer (&data
->abbrev
);
11866 munmap_section_buffer (&data
->line
);
11867 munmap_section_buffer (&data
->str
);
11868 munmap_section_buffer (&data
->macinfo
);
11869 munmap_section_buffer (&data
->ranges
);
11870 munmap_section_buffer (&data
->loc
);
11871 munmap_section_buffer (&data
->frame
);
11872 munmap_section_buffer (&data
->eh_frame
);
11875 void _initialize_dwarf2_read (void);
11878 _initialize_dwarf2_read (void)
11880 dwarf2_objfile_data_key
11881 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
11883 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
11884 Set DWARF 2 specific variables.\n\
11885 Configure DWARF 2 variables such as the cache size"),
11886 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
11887 0/*allow-unknown*/, &maintenance_set_cmdlist
);
11889 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
11890 Show DWARF 2 specific variables\n\
11891 Show DWARF 2 variables such as the cache size"),
11892 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
11893 0/*allow-unknown*/, &maintenance_show_cmdlist
);
11895 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
11896 &dwarf2_max_cache_age
, _("\
11897 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
11898 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
11899 A higher limit means that cached compilation units will be stored\n\
11900 in memory longer, and more total memory will be used. Zero disables\n\
11901 caching, which can slow down startup."),
11903 show_dwarf2_max_cache_age
,
11904 &set_dwarf2_cmdlist
,
11905 &show_dwarf2_cmdlist
);
11907 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
11908 Set debugging of the dwarf2 DIE reader."), _("\
11909 Show debugging of the dwarf2 DIE reader."), _("\
11910 When enabled (non-zero), DIEs are dumped after they are read in.\n\
11911 The value is the maximum depth to print."),
11914 &setdebuglist
, &showdebuglist
);