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 new_field
->accessibility
= DW_ACCESS_private
;
4488 fip
->non_public_fields
= 1;
4491 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4493 /* C++ static member. */
4495 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4496 is a declaration, but all versions of G++ as of this writing
4497 (so through at least 3.2.1) incorrectly generate
4498 DW_TAG_variable tags. */
4502 /* Get name of field. */
4503 fieldname
= dwarf2_name (die
, cu
);
4504 if (fieldname
== NULL
)
4507 /* Get physical name. */
4508 physname
= dwarf2_linkage_name (die
, cu
);
4510 /* The name is already allocated along with this objfile, so we don't
4511 need to duplicate it for the type. */
4512 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4513 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4514 FIELD_NAME (*fp
) = fieldname
;
4516 else if (die
->tag
== DW_TAG_inheritance
)
4518 /* C++ base class field. */
4519 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4522 int byte_offset
= 0;
4524 if (attr_form_is_section_offset (attr
))
4525 dwarf2_complex_location_expr_complaint ();
4526 else if (attr_form_is_constant (attr
))
4527 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4528 else if (attr_form_is_block (attr
))
4529 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4531 dwarf2_complex_location_expr_complaint ();
4533 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4535 FIELD_BITSIZE (*fp
) = 0;
4536 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4537 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4538 fip
->nbaseclasses
++;
4542 /* Create the vector of fields, and attach it to the type. */
4545 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4546 struct dwarf2_cu
*cu
)
4548 int nfields
= fip
->nfields
;
4550 /* Record the field count, allocate space for the array of fields,
4551 and create blank accessibility bitfields if necessary. */
4552 TYPE_NFIELDS (type
) = nfields
;
4553 TYPE_FIELDS (type
) = (struct field
*)
4554 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4555 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4557 if (fip
->non_public_fields
)
4559 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4561 TYPE_FIELD_PRIVATE_BITS (type
) =
4562 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4563 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4565 TYPE_FIELD_PROTECTED_BITS (type
) =
4566 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4567 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4569 TYPE_FIELD_IGNORE_BITS (type
) =
4570 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4571 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4574 /* If the type has baseclasses, allocate and clear a bit vector for
4575 TYPE_FIELD_VIRTUAL_BITS. */
4576 if (fip
->nbaseclasses
)
4578 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4579 unsigned char *pointer
;
4581 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4582 pointer
= TYPE_ALLOC (type
, num_bytes
);
4583 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4584 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4585 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4588 /* Copy the saved-up fields into the field vector. Start from the head
4589 of the list, adding to the tail of the field array, so that they end
4590 up in the same order in the array in which they were added to the list. */
4591 while (nfields
-- > 0)
4593 struct nextfield
*fieldp
;
4597 fieldp
= fip
->fields
;
4598 fip
->fields
= fieldp
->next
;
4602 fieldp
= fip
->baseclasses
;
4603 fip
->baseclasses
= fieldp
->next
;
4606 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4607 switch (fieldp
->accessibility
)
4609 case DW_ACCESS_private
:
4610 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4613 case DW_ACCESS_protected
:
4614 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4617 case DW_ACCESS_public
:
4621 /* Unknown accessibility. Complain and treat it as public. */
4623 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4624 fieldp
->accessibility
);
4628 if (nfields
< fip
->nbaseclasses
)
4630 switch (fieldp
->virtuality
)
4632 case DW_VIRTUALITY_virtual
:
4633 case DW_VIRTUALITY_pure_virtual
:
4634 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4641 /* Add a member function to the proper fieldlist. */
4644 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4645 struct type
*type
, struct dwarf2_cu
*cu
)
4647 struct objfile
*objfile
= cu
->objfile
;
4648 struct attribute
*attr
;
4649 struct fnfieldlist
*flp
;
4651 struct fn_field
*fnp
;
4654 struct nextfnfield
*new_fnfield
;
4655 struct type
*this_type
;
4657 /* Get name of member function. */
4658 fieldname
= dwarf2_name (die
, cu
);
4659 if (fieldname
== NULL
)
4662 /* Get the mangled name. */
4663 physname
= dwarf2_linkage_name (die
, cu
);
4665 /* Look up member function name in fieldlist. */
4666 for (i
= 0; i
< fip
->nfnfields
; i
++)
4668 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4672 /* Create new list element if necessary. */
4673 if (i
< fip
->nfnfields
)
4674 flp
= &fip
->fnfieldlists
[i
];
4677 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4679 fip
->fnfieldlists
= (struct fnfieldlist
*)
4680 xrealloc (fip
->fnfieldlists
,
4681 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4682 * sizeof (struct fnfieldlist
));
4683 if (fip
->nfnfields
== 0)
4684 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4686 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4687 flp
->name
= fieldname
;
4693 /* Create a new member function field and chain it to the field list
4695 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4696 make_cleanup (xfree
, new_fnfield
);
4697 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4698 new_fnfield
->next
= flp
->head
;
4699 flp
->head
= new_fnfield
;
4702 /* Fill in the member function field info. */
4703 fnp
= &new_fnfield
->fnfield
;
4704 /* The name is already allocated along with this objfile, so we don't
4705 need to duplicate it for the type. */
4706 fnp
->physname
= physname
? physname
: "";
4707 fnp
->type
= alloc_type (objfile
);
4708 this_type
= read_type_die (die
, cu
);
4709 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4711 int nparams
= TYPE_NFIELDS (this_type
);
4713 /* TYPE is the domain of this method, and THIS_TYPE is the type
4714 of the method itself (TYPE_CODE_METHOD). */
4715 smash_to_method_type (fnp
->type
, type
,
4716 TYPE_TARGET_TYPE (this_type
),
4717 TYPE_FIELDS (this_type
),
4718 TYPE_NFIELDS (this_type
),
4719 TYPE_VARARGS (this_type
));
4721 /* Handle static member functions.
4722 Dwarf2 has no clean way to discern C++ static and non-static
4723 member functions. G++ helps GDB by marking the first
4724 parameter for non-static member functions (which is the
4725 this pointer) as artificial. We obtain this information
4726 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4727 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4728 fnp
->voffset
= VOFFSET_STATIC
;
4731 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4734 /* Get fcontext from DW_AT_containing_type if present. */
4735 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4736 fnp
->fcontext
= die_containing_type (die
, cu
);
4738 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4739 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4741 /* Get accessibility. */
4742 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4745 switch (DW_UNSND (attr
))
4747 case DW_ACCESS_private
:
4748 fnp
->is_private
= 1;
4750 case DW_ACCESS_protected
:
4751 fnp
->is_protected
= 1;
4756 /* Check for artificial methods. */
4757 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4758 if (attr
&& DW_UNSND (attr
) != 0)
4759 fnp
->is_artificial
= 1;
4761 /* Get index in virtual function table if it is a virtual member
4762 function. For GCC, this is an offset in the appropriate
4763 virtual table, as specified by DW_AT_containing_type. For
4764 everyone else, it is an expression to be evaluated relative
4765 to the object address. */
4767 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4768 if (attr
&& fnp
->fcontext
)
4770 /* Support the .debug_loc offsets */
4771 if (attr_form_is_block (attr
))
4773 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4775 else if (attr_form_is_section_offset (attr
))
4777 dwarf2_complex_location_expr_complaint ();
4781 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4787 /* We only support trivial expressions here. This hack will work
4788 for v3 classes, which always start with the vtable pointer. */
4789 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0
4790 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref
)
4792 struct dwarf_block blk
;
4793 blk
.size
= DW_BLOCK (attr
)->size
- 1;
4794 blk
.data
= DW_BLOCK (attr
)->data
+ 1;
4795 fnp
->voffset
= decode_locdesc (&blk
, cu
);
4796 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4797 dwarf2_complex_location_expr_complaint ();
4799 fnp
->voffset
/= cu
->header
.addr_size
;
4801 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4804 dwarf2_complex_location_expr_complaint ();
4808 /* Create the vector of member function fields, and attach it to the type. */
4811 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4812 struct dwarf2_cu
*cu
)
4814 struct fnfieldlist
*flp
;
4815 int total_length
= 0;
4818 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4819 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4820 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4822 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4824 struct nextfnfield
*nfp
= flp
->head
;
4825 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4828 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4829 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4830 fn_flp
->fn_fields
= (struct fn_field
*)
4831 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4832 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4833 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4835 total_length
+= flp
->length
;
4838 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4839 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4842 /* Returns non-zero if NAME is the name of a vtable member in CU's
4843 language, zero otherwise. */
4845 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4847 static const char vptr
[] = "_vptr";
4848 static const char vtable
[] = "vtable";
4850 /* Look for the C++ and Java forms of the vtable. */
4851 if ((cu
->language
== language_java
4852 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4853 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4854 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4860 /* GCC outputs unnamed structures that are really pointers to member
4861 functions, with the ABI-specified layout. If DIE (from CU) describes
4862 such a structure, set its type, and return nonzero. Otherwise return
4865 GCC shouldn't do this; it should just output pointer to member DIEs.
4866 This is GCC PR debug/28767. */
4868 static struct type
*
4869 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
4871 struct objfile
*objfile
= cu
->objfile
;
4873 struct die_info
*pfn_die
, *delta_die
;
4874 struct attribute
*pfn_name
, *delta_name
;
4875 struct type
*pfn_type
, *domain_type
;
4877 /* Check for a structure with no name and two children. */
4878 if (die
->tag
!= DW_TAG_structure_type
4879 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
4880 || die
->child
== NULL
4881 || die
->child
->sibling
== NULL
4882 || (die
->child
->sibling
->sibling
!= NULL
4883 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
4886 /* Check for __pfn and __delta members. */
4887 pfn_die
= die
->child
;
4888 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
4889 if (pfn_die
->tag
!= DW_TAG_member
4891 || DW_STRING (pfn_name
) == NULL
4892 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
4895 delta_die
= pfn_die
->sibling
;
4896 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
4897 if (delta_die
->tag
!= DW_TAG_member
4898 || delta_name
== NULL
4899 || DW_STRING (delta_name
) == NULL
4900 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
4903 /* Find the type of the method. */
4904 pfn_type
= die_type (pfn_die
, cu
);
4905 if (pfn_type
== NULL
4906 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
4907 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
4910 /* Look for the "this" argument. */
4911 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
4912 if (TYPE_NFIELDS (pfn_type
) == 0
4913 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
4916 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
4917 type
= alloc_type (objfile
);
4918 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
4919 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
4920 TYPE_VARARGS (pfn_type
));
4921 type
= lookup_methodptr_type (type
);
4922 return set_die_type (die
, type
, cu
);
4925 /* Called when we find the DIE that starts a structure or union scope
4926 (definition) to process all dies that define the members of the
4929 NOTE: we need to call struct_type regardless of whether or not the
4930 DIE has an at_name attribute, since it might be an anonymous
4931 structure or union. This gets the type entered into our set of
4934 However, if the structure is incomplete (an opaque struct/union)
4935 then suppress creating a symbol table entry for it since gdb only
4936 wants to find the one with the complete definition. Note that if
4937 it is complete, we just call new_symbol, which does it's own
4938 checking about whether the struct/union is anonymous or not (and
4939 suppresses creating a symbol table entry itself). */
4941 static struct type
*
4942 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4944 struct objfile
*objfile
= cu
->objfile
;
4946 struct attribute
*attr
;
4948 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4950 type
= quirk_gcc_member_function_pointer (die
, cu
);
4954 /* If the definition of this type lives in .debug_types, read that type.
4955 Don't follow DW_AT_specification though, that will take us back up
4956 the chain and we want to go down. */
4957 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
4960 struct dwarf2_cu
*type_cu
= cu
;
4961 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
4962 /* We could just recurse on read_structure_type, but we need to call
4963 get_die_type to ensure only one type for this DIE is created.
4964 This is important, for example, because for c++ classes we need
4965 TYPE_NAME set which is only done by new_symbol. Blech. */
4966 type
= read_type_die (type_die
, type_cu
);
4967 return set_die_type (die
, type
, cu
);
4970 type
= alloc_type (objfile
);
4971 INIT_CPLUS_SPECIFIC (type
);
4973 name
= dwarf2_name (die
, cu
);
4976 if (cu
->language
== language_cplus
4977 || cu
->language
== language_java
)
4979 const char *new_prefix
= determine_class_name (die
, cu
);
4980 TYPE_TAG_NAME (type
) = (char *) new_prefix
;
4984 /* The name is already allocated along with this objfile, so
4985 we don't need to duplicate it for the type. */
4986 TYPE_TAG_NAME (type
) = name
;
4990 if (die
->tag
== DW_TAG_structure_type
)
4992 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
4994 else if (die
->tag
== DW_TAG_union_type
)
4996 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5000 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
5002 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5005 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5008 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5012 TYPE_LENGTH (type
) = 0;
5015 TYPE_STUB_SUPPORTED (type
) = 1;
5016 if (die_is_declaration (die
, cu
))
5017 TYPE_STUB (type
) = 1;
5019 /* We need to add the type field to the die immediately so we don't
5020 infinitely recurse when dealing with pointers to the structure
5021 type within the structure itself. */
5022 set_die_type (die
, type
, cu
);
5024 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5026 struct field_info fi
;
5027 struct die_info
*child_die
;
5029 memset (&fi
, 0, sizeof (struct field_info
));
5031 child_die
= die
->child
;
5033 while (child_die
&& child_die
->tag
)
5035 if (child_die
->tag
== DW_TAG_member
5036 || child_die
->tag
== DW_TAG_variable
)
5038 /* NOTE: carlton/2002-11-05: A C++ static data member
5039 should be a DW_TAG_member that is a declaration, but
5040 all versions of G++ as of this writing (so through at
5041 least 3.2.1) incorrectly generate DW_TAG_variable
5042 tags for them instead. */
5043 dwarf2_add_field (&fi
, child_die
, cu
);
5045 else if (child_die
->tag
== DW_TAG_subprogram
)
5047 /* C++ member function. */
5048 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5050 else if (child_die
->tag
== DW_TAG_inheritance
)
5052 /* C++ base class field. */
5053 dwarf2_add_field (&fi
, child_die
, cu
);
5055 child_die
= sibling_die (child_die
);
5058 /* Attach fields and member functions to the type. */
5060 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5063 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5065 /* Get the type which refers to the base class (possibly this
5066 class itself) which contains the vtable pointer for the current
5067 class from the DW_AT_containing_type attribute. This use of
5068 DW_AT_containing_type is a GNU extension. */
5070 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5072 struct type
*t
= die_containing_type (die
, cu
);
5074 TYPE_VPTR_BASETYPE (type
) = t
;
5079 /* Our own class provides vtbl ptr. */
5080 for (i
= TYPE_NFIELDS (t
) - 1;
5081 i
>= TYPE_N_BASECLASSES (t
);
5084 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5086 if (is_vtable_name (fieldname
, cu
))
5088 TYPE_VPTR_FIELDNO (type
) = i
;
5093 /* Complain if virtual function table field not found. */
5094 if (i
< TYPE_N_BASECLASSES (t
))
5095 complaint (&symfile_complaints
,
5096 _("virtual function table pointer not found when defining class '%s'"),
5097 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5102 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5105 else if (cu
->producer
5106 && strncmp (cu
->producer
,
5107 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5109 /* The IBM XLC compiler does not provide direct indication
5110 of the containing type, but the vtable pointer is
5111 always named __vfp. */
5115 for (i
= TYPE_NFIELDS (type
) - 1;
5116 i
>= TYPE_N_BASECLASSES (type
);
5119 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5121 TYPE_VPTR_FIELDNO (type
) = i
;
5122 TYPE_VPTR_BASETYPE (type
) = type
;
5130 do_cleanups (back_to
);
5135 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5137 struct objfile
*objfile
= cu
->objfile
;
5138 struct die_info
*child_die
= die
->child
;
5139 struct type
*this_type
;
5141 this_type
= get_die_type (die
, cu
);
5142 if (this_type
== NULL
)
5143 this_type
= read_structure_type (die
, cu
);
5145 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5146 snapshots) has been known to create a die giving a declaration
5147 for a class that has, as a child, a die giving a definition for a
5148 nested class. So we have to process our children even if the
5149 current die is a declaration. Normally, of course, a declaration
5150 won't have any children at all. */
5152 while (child_die
!= NULL
&& child_die
->tag
)
5154 if (child_die
->tag
== DW_TAG_member
5155 || child_die
->tag
== DW_TAG_variable
5156 || child_die
->tag
== DW_TAG_inheritance
)
5161 process_die (child_die
, cu
);
5163 child_die
= sibling_die (child_die
);
5166 /* Do not consider external references. According to the DWARF standard,
5167 these DIEs are identified by the fact that they have no byte_size
5168 attribute, and a declaration attribute. */
5169 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5170 || !die_is_declaration (die
, cu
))
5171 new_symbol (die
, this_type
, cu
);
5174 /* Given a DW_AT_enumeration_type die, set its type. We do not
5175 complete the type's fields yet, or create any symbols. */
5177 static struct type
*
5178 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5180 struct objfile
*objfile
= cu
->objfile
;
5182 struct attribute
*attr
;
5185 /* If the definition of this type lives in .debug_types, read that type.
5186 Don't follow DW_AT_specification though, that will take us back up
5187 the chain and we want to go down. */
5188 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5191 struct dwarf2_cu
*type_cu
= cu
;
5192 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5193 type
= read_type_die (type_die
, type_cu
);
5194 return set_die_type (die
, type
, cu
);
5197 type
= alloc_type (objfile
);
5199 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5200 name
= dwarf2_full_name (die
, cu
);
5202 TYPE_TAG_NAME (type
) = (char *) name
;
5204 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5207 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5211 TYPE_LENGTH (type
) = 0;
5214 /* The enumeration DIE can be incomplete. In Ada, any type can be
5215 declared as private in the package spec, and then defined only
5216 inside the package body. Such types are known as Taft Amendment
5217 Types. When another package uses such a type, an incomplete DIE
5218 may be generated by the compiler. */
5219 if (die_is_declaration (die
, cu
))
5220 TYPE_STUB (type
) = 1;
5222 return set_die_type (die
, type
, cu
);
5225 /* Determine the name of the type represented by DIE, which should be
5226 a named C++ or Java compound type. Return the name in question,
5227 allocated on the objfile obstack. */
5230 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
5232 const char *new_prefix
= NULL
;
5234 /* If we don't have namespace debug info, guess the name by trying
5235 to demangle the names of members, just like we did in
5236 guess_structure_name. */
5237 if (!processing_has_namespace_info
)
5239 struct die_info
*child
;
5241 for (child
= die
->child
;
5242 child
!= NULL
&& child
->tag
!= 0;
5243 child
= sibling_die (child
))
5245 if (child
->tag
== DW_TAG_subprogram
)
5248 = language_class_name_from_physname (cu
->language_defn
,
5252 if (phys_prefix
!= NULL
)
5255 = obsavestring (phys_prefix
, strlen (phys_prefix
),
5256 &cu
->objfile
->objfile_obstack
);
5257 xfree (phys_prefix
);
5264 if (new_prefix
== NULL
)
5265 new_prefix
= dwarf2_full_name (die
, cu
);
5270 /* Given a pointer to a die which begins an enumeration, process all
5271 the dies that define the members of the enumeration, and create the
5272 symbol for the enumeration type.
5274 NOTE: We reverse the order of the element list. */
5277 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5279 struct objfile
*objfile
= cu
->objfile
;
5280 struct die_info
*child_die
;
5281 struct field
*fields
;
5284 int unsigned_enum
= 1;
5286 struct type
*this_type
;
5290 this_type
= get_die_type (die
, cu
);
5291 if (this_type
== NULL
)
5292 this_type
= read_enumeration_type (die
, cu
);
5293 if (die
->child
!= NULL
)
5295 child_die
= die
->child
;
5296 while (child_die
&& child_die
->tag
)
5298 if (child_die
->tag
!= DW_TAG_enumerator
)
5300 process_die (child_die
, cu
);
5304 name
= dwarf2_name (child_die
, cu
);
5307 sym
= new_symbol (child_die
, this_type
, cu
);
5308 if (SYMBOL_VALUE (sym
) < 0)
5311 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5313 fields
= (struct field
*)
5315 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5316 * sizeof (struct field
));
5319 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5320 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5321 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5322 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5328 child_die
= sibling_die (child_die
);
5333 TYPE_NFIELDS (this_type
) = num_fields
;
5334 TYPE_FIELDS (this_type
) = (struct field
*)
5335 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5336 memcpy (TYPE_FIELDS (this_type
), fields
,
5337 sizeof (struct field
) * num_fields
);
5341 TYPE_UNSIGNED (this_type
) = 1;
5344 new_symbol (die
, this_type
, cu
);
5347 /* Extract all information from a DW_TAG_array_type DIE and put it in
5348 the DIE's type field. For now, this only handles one dimensional
5351 static struct type
*
5352 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5354 struct objfile
*objfile
= cu
->objfile
;
5355 struct die_info
*child_die
;
5356 struct type
*type
= NULL
;
5357 struct type
*element_type
, *range_type
, *index_type
;
5358 struct type
**range_types
= NULL
;
5359 struct attribute
*attr
;
5361 struct cleanup
*back_to
;
5364 element_type
= die_type (die
, cu
);
5366 /* Irix 6.2 native cc creates array types without children for
5367 arrays with unspecified length. */
5368 if (die
->child
== NULL
)
5370 index_type
= objfile_type (objfile
)->builtin_int
;
5371 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5372 type
= create_array_type (NULL
, element_type
, range_type
);
5373 return set_die_type (die
, type
, cu
);
5376 back_to
= make_cleanup (null_cleanup
, NULL
);
5377 child_die
= die
->child
;
5378 while (child_die
&& child_die
->tag
)
5380 if (child_die
->tag
== DW_TAG_subrange_type
)
5382 struct type
*child_type
= read_type_die (child_die
, cu
);
5383 if (child_type
!= NULL
)
5385 /* The range type was succesfully read. Save it for
5386 the array type creation. */
5387 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5389 range_types
= (struct type
**)
5390 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5391 * sizeof (struct type
*));
5393 make_cleanup (free_current_contents
, &range_types
);
5395 range_types
[ndim
++] = child_type
;
5398 child_die
= sibling_die (child_die
);
5401 /* Dwarf2 dimensions are output from left to right, create the
5402 necessary array types in backwards order. */
5404 type
= element_type
;
5406 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5410 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5415 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5418 /* Understand Dwarf2 support for vector types (like they occur on
5419 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5420 array type. This is not part of the Dwarf2/3 standard yet, but a
5421 custom vendor extension. The main difference between a regular
5422 array and the vector variant is that vectors are passed by value
5424 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5426 make_vector_type (type
);
5428 name
= dwarf2_name (die
, cu
);
5430 TYPE_NAME (type
) = name
;
5432 do_cleanups (back_to
);
5434 /* Install the type in the die. */
5435 return set_die_type (die
, type
, cu
);
5438 static enum dwarf_array_dim_ordering
5439 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5441 struct attribute
*attr
;
5443 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5445 if (attr
) return DW_SND (attr
);
5448 GNU F77 is a special case, as at 08/2004 array type info is the
5449 opposite order to the dwarf2 specification, but data is still
5450 laid out as per normal fortran.
5452 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5456 if (cu
->language
== language_fortran
5457 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5459 return DW_ORD_row_major
;
5462 switch (cu
->language_defn
->la_array_ordering
)
5464 case array_column_major
:
5465 return DW_ORD_col_major
;
5466 case array_row_major
:
5468 return DW_ORD_row_major
;
5472 /* Extract all information from a DW_TAG_set_type DIE and put it in
5473 the DIE's type field. */
5475 static struct type
*
5476 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5478 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5480 return set_die_type (die
, set_type
, cu
);
5483 /* First cut: install each common block member as a global variable. */
5486 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5488 struct die_info
*child_die
;
5489 struct attribute
*attr
;
5491 CORE_ADDR base
= (CORE_ADDR
) 0;
5493 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5496 /* Support the .debug_loc offsets */
5497 if (attr_form_is_block (attr
))
5499 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5501 else if (attr_form_is_section_offset (attr
))
5503 dwarf2_complex_location_expr_complaint ();
5507 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5508 "common block member");
5511 if (die
->child
!= NULL
)
5513 child_die
= die
->child
;
5514 while (child_die
&& child_die
->tag
)
5516 sym
= new_symbol (child_die
, NULL
, cu
);
5517 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5520 CORE_ADDR byte_offset
= 0;
5522 if (attr_form_is_section_offset (attr
))
5523 dwarf2_complex_location_expr_complaint ();
5524 else if (attr_form_is_constant (attr
))
5525 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5526 else if (attr_form_is_block (attr
))
5527 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5529 dwarf2_complex_location_expr_complaint ();
5531 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5532 add_symbol_to_list (sym
, &global_symbols
);
5534 child_die
= sibling_die (child_die
);
5539 /* Create a type for a C++ namespace. */
5541 static struct type
*
5542 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5544 struct objfile
*objfile
= cu
->objfile
;
5545 const char *previous_prefix
, *name
;
5549 /* For extensions, reuse the type of the original namespace. */
5550 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5552 struct die_info
*ext_die
;
5553 struct dwarf2_cu
*ext_cu
= cu
;
5554 ext_die
= dwarf2_extension (die
, &ext_cu
);
5555 type
= read_type_die (ext_die
, ext_cu
);
5556 return set_die_type (die
, type
, cu
);
5559 name
= namespace_name (die
, &is_anonymous
, cu
);
5561 /* Now build the name of the current namespace. */
5563 previous_prefix
= determine_prefix (die
, cu
);
5564 if (previous_prefix
[0] != '\0')
5565 name
= typename_concat (&objfile
->objfile_obstack
,
5566 previous_prefix
, name
, cu
);
5568 /* Create the type. */
5569 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5571 TYPE_NAME (type
) = (char *) name
;
5572 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5574 set_die_type (die
, type
, cu
);
5579 /* Read a C++ namespace. */
5582 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5584 struct objfile
*objfile
= cu
->objfile
;
5588 /* Add a symbol associated to this if we haven't seen the namespace
5589 before. Also, add a using directive if it's an anonymous
5592 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5596 type
= read_type_die (die
, cu
);
5597 new_symbol (die
, type
, cu
);
5599 name
= namespace_name (die
, &is_anonymous
, cu
);
5602 const char *previous_prefix
= determine_prefix (die
, cu
);
5603 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
));
5607 if (die
->child
!= NULL
)
5609 struct die_info
*child_die
= die
->child
;
5611 while (child_die
&& child_die
->tag
)
5613 process_die (child_die
, cu
);
5614 child_die
= sibling_die (child_die
);
5619 /* Read a Fortran module. */
5622 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5624 struct die_info
*child_die
= die
->child
;
5626 /* FIXME: Support the separate Fortran module namespaces. */
5628 while (child_die
&& child_die
->tag
)
5630 process_die (child_die
, cu
);
5631 child_die
= sibling_die (child_die
);
5635 /* Return the name of the namespace represented by DIE. Set
5636 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5640 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5642 struct die_info
*current_die
;
5643 const char *name
= NULL
;
5645 /* Loop through the extensions until we find a name. */
5647 for (current_die
= die
;
5648 current_die
!= NULL
;
5649 current_die
= dwarf2_extension (die
, &cu
))
5651 name
= dwarf2_name (current_die
, cu
);
5656 /* Is it an anonymous namespace? */
5658 *is_anonymous
= (name
== NULL
);
5660 name
= "(anonymous namespace)";
5665 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5666 the user defined type vector. */
5668 static struct type
*
5669 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5671 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5672 struct comp_unit_head
*cu_header
= &cu
->header
;
5674 struct attribute
*attr_byte_size
;
5675 struct attribute
*attr_address_class
;
5676 int byte_size
, addr_class
;
5678 type
= lookup_pointer_type (die_type (die
, cu
));
5680 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5682 byte_size
= DW_UNSND (attr_byte_size
);
5684 byte_size
= cu_header
->addr_size
;
5686 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5687 if (attr_address_class
)
5688 addr_class
= DW_UNSND (attr_address_class
);
5690 addr_class
= DW_ADDR_none
;
5692 /* If the pointer size or address class is different than the
5693 default, create a type variant marked as such and set the
5694 length accordingly. */
5695 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5697 if (gdbarch_address_class_type_flags_p (gdbarch
))
5701 type_flags
= gdbarch_address_class_type_flags
5702 (gdbarch
, byte_size
, addr_class
);
5703 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5705 type
= make_type_with_address_space (type
, type_flags
);
5707 else if (TYPE_LENGTH (type
) != byte_size
)
5709 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5712 /* Should we also complain about unhandled address classes? */
5716 TYPE_LENGTH (type
) = byte_size
;
5717 return set_die_type (die
, type
, cu
);
5720 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5721 the user defined type vector. */
5723 static struct type
*
5724 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5726 struct objfile
*objfile
= cu
->objfile
;
5728 struct type
*to_type
;
5729 struct type
*domain
;
5731 to_type
= die_type (die
, cu
);
5732 domain
= die_containing_type (die
, cu
);
5734 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5735 type
= lookup_methodptr_type (to_type
);
5737 type
= lookup_memberptr_type (to_type
, domain
);
5739 return set_die_type (die
, type
, cu
);
5742 /* Extract all information from a DW_TAG_reference_type DIE and add to
5743 the user defined type vector. */
5745 static struct type
*
5746 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5748 struct comp_unit_head
*cu_header
= &cu
->header
;
5750 struct attribute
*attr
;
5752 type
= lookup_reference_type (die_type (die
, cu
));
5753 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5756 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5760 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5762 return set_die_type (die
, type
, cu
);
5765 static struct type
*
5766 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5768 struct type
*base_type
, *cv_type
;
5770 base_type
= die_type (die
, cu
);
5771 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5772 return set_die_type (die
, cv_type
, cu
);
5775 static struct type
*
5776 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5778 struct type
*base_type
, *cv_type
;
5780 base_type
= die_type (die
, cu
);
5781 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5782 return set_die_type (die
, cv_type
, cu
);
5785 /* Extract all information from a DW_TAG_string_type DIE and add to
5786 the user defined type vector. It isn't really a user defined type,
5787 but it behaves like one, with other DIE's using an AT_user_def_type
5788 attribute to reference it. */
5790 static struct type
*
5791 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5793 struct objfile
*objfile
= cu
->objfile
;
5794 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5795 struct type
*type
, *range_type
, *index_type
, *char_type
;
5796 struct attribute
*attr
;
5797 unsigned int length
;
5799 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5802 length
= DW_UNSND (attr
);
5806 /* check for the DW_AT_byte_size attribute */
5807 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5810 length
= DW_UNSND (attr
);
5818 index_type
= objfile_type (objfile
)->builtin_int
;
5819 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5820 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5821 type
= create_string_type (NULL
, char_type
, range_type
);
5823 return set_die_type (die
, type
, cu
);
5826 /* Handle DIES due to C code like:
5830 int (*funcp)(int a, long l);
5834 ('funcp' generates a DW_TAG_subroutine_type DIE)
5837 static struct type
*
5838 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5840 struct type
*type
; /* Type that this function returns */
5841 struct type
*ftype
; /* Function that returns above type */
5842 struct attribute
*attr
;
5844 type
= die_type (die
, cu
);
5845 ftype
= lookup_function_type (type
);
5847 /* All functions in C++, Pascal and Java have prototypes. */
5848 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5849 if ((attr
&& (DW_UNSND (attr
) != 0))
5850 || cu
->language
== language_cplus
5851 || cu
->language
== language_java
5852 || cu
->language
== language_pascal
)
5853 TYPE_PROTOTYPED (ftype
) = 1;
5855 /* Store the calling convention in the type if it's available in
5856 the subroutine die. Otherwise set the calling convention to
5857 the default value DW_CC_normal. */
5858 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5859 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5861 if (die
->child
!= NULL
)
5863 struct die_info
*child_die
;
5867 /* Count the number of parameters.
5868 FIXME: GDB currently ignores vararg functions, but knows about
5869 vararg member functions. */
5870 child_die
= die
->child
;
5871 while (child_die
&& child_die
->tag
)
5873 if (child_die
->tag
== DW_TAG_formal_parameter
)
5875 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5876 TYPE_VARARGS (ftype
) = 1;
5877 child_die
= sibling_die (child_die
);
5880 /* Allocate storage for parameters and fill them in. */
5881 TYPE_NFIELDS (ftype
) = nparams
;
5882 TYPE_FIELDS (ftype
) = (struct field
*)
5883 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5885 child_die
= die
->child
;
5886 while (child_die
&& child_die
->tag
)
5888 if (child_die
->tag
== DW_TAG_formal_parameter
)
5890 /* Dwarf2 has no clean way to discern C++ static and non-static
5891 member functions. G++ helps GDB by marking the first
5892 parameter for non-static member functions (which is the
5893 this pointer) as artificial. We pass this information
5894 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5895 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5897 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5899 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5900 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
5903 child_die
= sibling_die (child_die
);
5907 return set_die_type (die
, ftype
, cu
);
5910 static struct type
*
5911 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
5913 struct objfile
*objfile
= cu
->objfile
;
5914 struct attribute
*attr
;
5915 const char *name
= NULL
;
5916 struct type
*this_type
;
5918 name
= dwarf2_full_name (die
, cu
);
5919 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
5920 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
5921 TYPE_NAME (this_type
) = (char *) name
;
5922 set_die_type (die
, this_type
, cu
);
5923 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
5927 /* Find a representation of a given base type and install
5928 it in the TYPE field of the die. */
5930 static struct type
*
5931 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5933 struct objfile
*objfile
= cu
->objfile
;
5935 struct attribute
*attr
;
5936 int encoding
= 0, size
= 0;
5938 enum type_code code
= TYPE_CODE_INT
;
5940 struct type
*target_type
= NULL
;
5942 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5945 encoding
= DW_UNSND (attr
);
5947 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5950 size
= DW_UNSND (attr
);
5952 name
= dwarf2_name (die
, cu
);
5955 complaint (&symfile_complaints
,
5956 _("DW_AT_name missing from DW_TAG_base_type"));
5961 case DW_ATE_address
:
5962 /* Turn DW_ATE_address into a void * pointer. */
5963 code
= TYPE_CODE_PTR
;
5964 type_flags
|= TYPE_FLAG_UNSIGNED
;
5965 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5967 case DW_ATE_boolean
:
5968 code
= TYPE_CODE_BOOL
;
5969 type_flags
|= TYPE_FLAG_UNSIGNED
;
5971 case DW_ATE_complex_float
:
5972 code
= TYPE_CODE_COMPLEX
;
5973 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
5975 case DW_ATE_decimal_float
:
5976 code
= TYPE_CODE_DECFLOAT
;
5979 code
= TYPE_CODE_FLT
;
5983 case DW_ATE_unsigned
:
5984 type_flags
|= TYPE_FLAG_UNSIGNED
;
5986 case DW_ATE_signed_char
:
5987 if (cu
->language
== language_ada
|| cu
->language
== language_m2
5988 || cu
->language
== language_pascal
)
5989 code
= TYPE_CODE_CHAR
;
5991 case DW_ATE_unsigned_char
:
5992 if (cu
->language
== language_ada
|| cu
->language
== language_m2
5993 || cu
->language
== language_pascal
)
5994 code
= TYPE_CODE_CHAR
;
5995 type_flags
|= TYPE_FLAG_UNSIGNED
;
5998 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
5999 dwarf_type_encoding_name (encoding
));
6003 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6004 TYPE_NAME (type
) = name
;
6005 TYPE_TARGET_TYPE (type
) = target_type
;
6007 if (name
&& strcmp (name
, "char") == 0)
6008 TYPE_NOSIGN (type
) = 1;
6010 return set_die_type (die
, type
, cu
);
6013 /* Read the given DW_AT_subrange DIE. */
6015 static struct type
*
6016 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6018 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6019 struct type
*base_type
;
6020 struct type
*range_type
;
6021 struct attribute
*attr
;
6026 base_type
= die_type (die
, cu
);
6027 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6029 complaint (&symfile_complaints
,
6030 _("DW_AT_type missing from DW_TAG_subrange_type"));
6032 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
6033 0, NULL
, cu
->objfile
);
6036 if (cu
->language
== language_fortran
)
6038 /* FORTRAN implies a lower bound of 1, if not given. */
6042 /* FIXME: For variable sized arrays either of these could be
6043 a variable rather than a constant value. We'll allow it,
6044 but we don't know how to handle it. */
6045 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6047 low
= dwarf2_get_attr_constant_value (attr
, 0);
6049 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6052 if (attr
->form
== DW_FORM_block1
)
6054 /* GCC encodes arrays with unspecified or dynamic length
6055 with a DW_FORM_block1 attribute.
6056 FIXME: GDB does not yet know how to handle dynamic
6057 arrays properly, treat them as arrays with unspecified
6060 FIXME: jimb/2003-09-22: GDB does not really know
6061 how to handle arrays of unspecified length
6062 either; we just represent them as zero-length
6063 arrays. Choose an appropriate upper bound given
6064 the lower bound we've computed above. */
6068 high
= dwarf2_get_attr_constant_value (attr
, 1);
6071 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6073 name
= dwarf2_name (die
, cu
);
6075 TYPE_NAME (range_type
) = name
;
6077 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6079 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6081 return set_die_type (die
, range_type
, cu
);
6084 static struct type
*
6085 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6089 /* For now, we only support the C meaning of an unspecified type: void. */
6091 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6092 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6094 return set_die_type (die
, type
, cu
);
6097 /* Trivial hash function for die_info: the hash value of a DIE
6098 is its offset in .debug_info for this objfile. */
6101 die_hash (const void *item
)
6103 const struct die_info
*die
= item
;
6107 /* Trivial comparison function for die_info structures: two DIEs
6108 are equal if they have the same offset. */
6111 die_eq (const void *item_lhs
, const void *item_rhs
)
6113 const struct die_info
*die_lhs
= item_lhs
;
6114 const struct die_info
*die_rhs
= item_rhs
;
6115 return die_lhs
->offset
== die_rhs
->offset
;
6118 /* Read a whole compilation unit into a linked list of dies. */
6120 static struct die_info
*
6121 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6123 struct die_reader_specs reader_specs
;
6125 gdb_assert (cu
->die_hash
== NULL
);
6127 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6131 &cu
->comp_unit_obstack
,
6132 hashtab_obstack_allocate
,
6133 dummy_obstack_deallocate
);
6135 init_cu_die_reader (&reader_specs
, cu
);
6137 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6140 /* Main entry point for reading a DIE and all children.
6141 Read the DIE and dump it if requested. */
6143 static struct die_info
*
6144 read_die_and_children (const struct die_reader_specs
*reader
,
6146 gdb_byte
**new_info_ptr
,
6147 struct die_info
*parent
)
6149 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6150 new_info_ptr
, parent
);
6152 if (dwarf2_die_debug
)
6154 fprintf_unfiltered (gdb_stdlog
,
6155 "\nRead die from %s of %s:\n",
6156 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6158 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6160 : "unknown section",
6161 reader
->abfd
->filename
);
6162 dump_die (result
, dwarf2_die_debug
);
6168 /* Read a single die and all its descendents. Set the die's sibling
6169 field to NULL; set other fields in the die correctly, and set all
6170 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6171 location of the info_ptr after reading all of those dies. PARENT
6172 is the parent of the die in question. */
6174 static struct die_info
*
6175 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6177 gdb_byte
**new_info_ptr
,
6178 struct die_info
*parent
)
6180 struct die_info
*die
;
6184 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6187 *new_info_ptr
= cur_ptr
;
6190 store_in_ref_table (die
, reader
->cu
);
6193 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6197 *new_info_ptr
= cur_ptr
;
6200 die
->sibling
= NULL
;
6201 die
->parent
= parent
;
6205 /* Read a die, all of its descendents, and all of its siblings; set
6206 all of the fields of all of the dies correctly. Arguments are as
6207 in read_die_and_children. */
6209 static struct die_info
*
6210 read_die_and_siblings (const struct die_reader_specs
*reader
,
6212 gdb_byte
**new_info_ptr
,
6213 struct die_info
*parent
)
6215 struct die_info
*first_die
, *last_sibling
;
6219 first_die
= last_sibling
= NULL
;
6223 struct die_info
*die
6224 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6228 *new_info_ptr
= cur_ptr
;
6235 last_sibling
->sibling
= die
;
6241 /* Read the die from the .debug_info section buffer. Set DIEP to
6242 point to a newly allocated die with its information, except for its
6243 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6244 whether the die has children or not. */
6247 read_full_die (const struct die_reader_specs
*reader
,
6248 struct die_info
**diep
, gdb_byte
*info_ptr
,
6251 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6252 struct abbrev_info
*abbrev
;
6253 struct die_info
*die
;
6254 struct dwarf2_cu
*cu
= reader
->cu
;
6255 bfd
*abfd
= reader
->abfd
;
6257 offset
= info_ptr
- reader
->buffer
;
6258 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6259 info_ptr
+= bytes_read
;
6267 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6269 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6271 bfd_get_filename (abfd
));
6273 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6274 die
->offset
= offset
;
6275 die
->tag
= abbrev
->tag
;
6276 die
->abbrev
= abbrev_number
;
6278 die
->num_attrs
= abbrev
->num_attrs
;
6280 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6281 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6282 abfd
, info_ptr
, cu
);
6285 *has_children
= abbrev
->has_children
;
6289 /* In DWARF version 2, the description of the debugging information is
6290 stored in a separate .debug_abbrev section. Before we read any
6291 dies from a section we read in all abbreviations and install them
6292 in a hash table. This function also sets flags in CU describing
6293 the data found in the abbrev table. */
6296 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6298 struct comp_unit_head
*cu_header
= &cu
->header
;
6299 gdb_byte
*abbrev_ptr
;
6300 struct abbrev_info
*cur_abbrev
;
6301 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6302 unsigned int abbrev_form
, hash_number
;
6303 struct attr_abbrev
*cur_attrs
;
6304 unsigned int allocated_attrs
;
6306 /* Initialize dwarf2 abbrevs */
6307 obstack_init (&cu
->abbrev_obstack
);
6308 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6310 * sizeof (struct abbrev_info
*)));
6311 memset (cu
->dwarf2_abbrevs
, 0,
6312 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6314 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6315 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6316 abbrev_ptr
+= bytes_read
;
6318 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6319 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6321 /* loop until we reach an abbrev number of 0 */
6322 while (abbrev_number
)
6324 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6326 /* read in abbrev header */
6327 cur_abbrev
->number
= abbrev_number
;
6328 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6329 abbrev_ptr
+= bytes_read
;
6330 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6333 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6334 cu
->has_namespace_info
= 1;
6336 /* now read in declarations */
6337 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6338 abbrev_ptr
+= bytes_read
;
6339 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6340 abbrev_ptr
+= bytes_read
;
6343 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6345 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6347 = xrealloc (cur_attrs
, (allocated_attrs
6348 * sizeof (struct attr_abbrev
)));
6351 /* Record whether this compilation unit might have
6352 inter-compilation-unit references. If we don't know what form
6353 this attribute will have, then it might potentially be a
6354 DW_FORM_ref_addr, so we conservatively expect inter-CU
6357 if (abbrev_form
== DW_FORM_ref_addr
6358 || abbrev_form
== DW_FORM_indirect
)
6359 cu
->has_form_ref_addr
= 1;
6361 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6362 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6363 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6364 abbrev_ptr
+= bytes_read
;
6365 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6366 abbrev_ptr
+= bytes_read
;
6369 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6370 (cur_abbrev
->num_attrs
6371 * sizeof (struct attr_abbrev
)));
6372 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6373 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6375 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6376 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6377 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6379 /* Get next abbreviation.
6380 Under Irix6 the abbreviations for a compilation unit are not
6381 always properly terminated with an abbrev number of 0.
6382 Exit loop if we encounter an abbreviation which we have
6383 already read (which means we are about to read the abbreviations
6384 for the next compile unit) or if the end of the abbreviation
6385 table is reached. */
6386 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6387 >= dwarf2_per_objfile
->abbrev
.size
)
6389 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6390 abbrev_ptr
+= bytes_read
;
6391 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6398 /* Release the memory used by the abbrev table for a compilation unit. */
6401 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6403 struct dwarf2_cu
*cu
= ptr_to_cu
;
6405 obstack_free (&cu
->abbrev_obstack
, NULL
);
6406 cu
->dwarf2_abbrevs
= NULL
;
6409 /* Lookup an abbrev_info structure in the abbrev hash table. */
6411 static struct abbrev_info
*
6412 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6414 unsigned int hash_number
;
6415 struct abbrev_info
*abbrev
;
6417 hash_number
= number
% ABBREV_HASH_SIZE
;
6418 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6422 if (abbrev
->number
== number
)
6425 abbrev
= abbrev
->next
;
6430 /* Returns nonzero if TAG represents a type that we might generate a partial
6434 is_type_tag_for_partial (int tag
)
6439 /* Some types that would be reasonable to generate partial symbols for,
6440 that we don't at present. */
6441 case DW_TAG_array_type
:
6442 case DW_TAG_file_type
:
6443 case DW_TAG_ptr_to_member_type
:
6444 case DW_TAG_set_type
:
6445 case DW_TAG_string_type
:
6446 case DW_TAG_subroutine_type
:
6448 case DW_TAG_base_type
:
6449 case DW_TAG_class_type
:
6450 case DW_TAG_interface_type
:
6451 case DW_TAG_enumeration_type
:
6452 case DW_TAG_structure_type
:
6453 case DW_TAG_subrange_type
:
6454 case DW_TAG_typedef
:
6455 case DW_TAG_union_type
:
6462 /* Load all DIEs that are interesting for partial symbols into memory. */
6464 static struct partial_die_info
*
6465 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6466 int building_psymtab
, struct dwarf2_cu
*cu
)
6468 struct partial_die_info
*part_die
;
6469 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6470 struct abbrev_info
*abbrev
;
6471 unsigned int bytes_read
;
6472 unsigned int load_all
= 0;
6474 int nesting_level
= 1;
6479 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6483 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6487 &cu
->comp_unit_obstack
,
6488 hashtab_obstack_allocate
,
6489 dummy_obstack_deallocate
);
6491 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6492 sizeof (struct partial_die_info
));
6496 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6498 /* A NULL abbrev means the end of a series of children. */
6501 if (--nesting_level
== 0)
6503 /* PART_DIE was probably the last thing allocated on the
6504 comp_unit_obstack, so we could call obstack_free
6505 here. We don't do that because the waste is small,
6506 and will be cleaned up when we're done with this
6507 compilation unit. This way, we're also more robust
6508 against other users of the comp_unit_obstack. */
6511 info_ptr
+= bytes_read
;
6512 last_die
= parent_die
;
6513 parent_die
= parent_die
->die_parent
;
6517 /* Check whether this DIE is interesting enough to save. Normally
6518 we would not be interested in members here, but there may be
6519 later variables referencing them via DW_AT_specification (for
6522 && !is_type_tag_for_partial (abbrev
->tag
)
6523 && abbrev
->tag
!= DW_TAG_enumerator
6524 && abbrev
->tag
!= DW_TAG_subprogram
6525 && abbrev
->tag
!= DW_TAG_lexical_block
6526 && abbrev
->tag
!= DW_TAG_variable
6527 && abbrev
->tag
!= DW_TAG_namespace
6528 && abbrev
->tag
!= DW_TAG_member
)
6530 /* Otherwise we skip to the next sibling, if any. */
6531 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6535 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6536 buffer
, info_ptr
, cu
);
6538 /* This two-pass algorithm for processing partial symbols has a
6539 high cost in cache pressure. Thus, handle some simple cases
6540 here which cover the majority of C partial symbols. DIEs
6541 which neither have specification tags in them, nor could have
6542 specification tags elsewhere pointing at them, can simply be
6543 processed and discarded.
6545 This segment is also optional; scan_partial_symbols and
6546 add_partial_symbol will handle these DIEs if we chain
6547 them in normally. When compilers which do not emit large
6548 quantities of duplicate debug information are more common,
6549 this code can probably be removed. */
6551 /* Any complete simple types at the top level (pretty much all
6552 of them, for a language without namespaces), can be processed
6554 if (parent_die
== NULL
6555 && part_die
->has_specification
== 0
6556 && part_die
->is_declaration
== 0
6557 && (part_die
->tag
== DW_TAG_typedef
6558 || part_die
->tag
== DW_TAG_base_type
6559 || part_die
->tag
== DW_TAG_subrange_type
))
6561 if (building_psymtab
&& part_die
->name
!= NULL
)
6562 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
6563 VAR_DOMAIN
, LOC_TYPEDEF
,
6564 &cu
->objfile
->static_psymbols
,
6565 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6566 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6570 /* If we're at the second level, and we're an enumerator, and
6571 our parent has no specification (meaning possibly lives in a
6572 namespace elsewhere), then we can add the partial symbol now
6573 instead of queueing it. */
6574 if (part_die
->tag
== DW_TAG_enumerator
6575 && parent_die
!= NULL
6576 && parent_die
->die_parent
== NULL
6577 && parent_die
->tag
== DW_TAG_enumeration_type
6578 && parent_die
->has_specification
== 0)
6580 if (part_die
->name
== NULL
)
6581 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6582 else if (building_psymtab
)
6583 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
6584 VAR_DOMAIN
, LOC_CONST
,
6585 (cu
->language
== language_cplus
6586 || cu
->language
== language_java
)
6587 ? &cu
->objfile
->global_psymbols
6588 : &cu
->objfile
->static_psymbols
,
6589 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6591 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6595 /* We'll save this DIE so link it in. */
6596 part_die
->die_parent
= parent_die
;
6597 part_die
->die_sibling
= NULL
;
6598 part_die
->die_child
= NULL
;
6600 if (last_die
&& last_die
== parent_die
)
6601 last_die
->die_child
= part_die
;
6603 last_die
->die_sibling
= part_die
;
6605 last_die
= part_die
;
6607 if (first_die
== NULL
)
6608 first_die
= part_die
;
6610 /* Maybe add the DIE to the hash table. Not all DIEs that we
6611 find interesting need to be in the hash table, because we
6612 also have the parent/sibling/child chains; only those that we
6613 might refer to by offset later during partial symbol reading.
6615 For now this means things that might have be the target of a
6616 DW_AT_specification, DW_AT_abstract_origin, or
6617 DW_AT_extension. DW_AT_extension will refer only to
6618 namespaces; DW_AT_abstract_origin refers to functions (and
6619 many things under the function DIE, but we do not recurse
6620 into function DIEs during partial symbol reading) and
6621 possibly variables as well; DW_AT_specification refers to
6622 declarations. Declarations ought to have the DW_AT_declaration
6623 flag. It happens that GCC forgets to put it in sometimes, but
6624 only for functions, not for types.
6626 Adding more things than necessary to the hash table is harmless
6627 except for the performance cost. Adding too few will result in
6628 wasted time in find_partial_die, when we reread the compilation
6629 unit with load_all_dies set. */
6632 || abbrev
->tag
== DW_TAG_subprogram
6633 || abbrev
->tag
== DW_TAG_variable
6634 || abbrev
->tag
== DW_TAG_namespace
6635 || part_die
->is_declaration
)
6639 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6640 part_die
->offset
, INSERT
);
6644 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6645 sizeof (struct partial_die_info
));
6647 /* For some DIEs we want to follow their children (if any). For C
6648 we have no reason to follow the children of structures; for other
6649 languages we have to, both so that we can get at method physnames
6650 to infer fully qualified class names, and for DW_AT_specification.
6652 For Ada, we need to scan the children of subprograms and lexical
6653 blocks as well because Ada allows the definition of nested
6654 entities that could be interesting for the debugger, such as
6655 nested subprograms for instance. */
6656 if (last_die
->has_children
6658 || last_die
->tag
== DW_TAG_namespace
6659 || last_die
->tag
== DW_TAG_enumeration_type
6660 || (cu
->language
!= language_c
6661 && (last_die
->tag
== DW_TAG_class_type
6662 || last_die
->tag
== DW_TAG_interface_type
6663 || last_die
->tag
== DW_TAG_structure_type
6664 || last_die
->tag
== DW_TAG_union_type
))
6665 || (cu
->language
== language_ada
6666 && (last_die
->tag
== DW_TAG_subprogram
6667 || last_die
->tag
== DW_TAG_lexical_block
))))
6670 parent_die
= last_die
;
6674 /* Otherwise we skip to the next sibling, if any. */
6675 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6677 /* Back to the top, do it again. */
6681 /* Read a minimal amount of information into the minimal die structure. */
6684 read_partial_die (struct partial_die_info
*part_die
,
6685 struct abbrev_info
*abbrev
,
6686 unsigned int abbrev_len
, bfd
*abfd
,
6687 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6688 struct dwarf2_cu
*cu
)
6690 unsigned int bytes_read
, i
;
6691 struct attribute attr
;
6692 int has_low_pc_attr
= 0;
6693 int has_high_pc_attr
= 0;
6695 memset (part_die
, 0, sizeof (struct partial_die_info
));
6697 part_die
->offset
= info_ptr
- buffer
;
6699 info_ptr
+= abbrev_len
;
6704 part_die
->tag
= abbrev
->tag
;
6705 part_die
->has_children
= abbrev
->has_children
;
6707 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6709 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6711 /* Store the data if it is of an attribute we want to keep in a
6712 partial symbol table. */
6716 switch (part_die
->tag
)
6718 case DW_TAG_compile_unit
:
6719 case DW_TAG_type_unit
:
6720 /* Compilation units have a DW_AT_name that is a filename, not
6721 a source language identifier. */
6722 case DW_TAG_enumeration_type
:
6723 case DW_TAG_enumerator
:
6724 /* These tags always have simple identifiers already; no need
6725 to canonicalize them. */
6726 part_die
->name
= DW_STRING (&attr
);
6730 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6731 &cu
->comp_unit_obstack
);
6735 case DW_AT_MIPS_linkage_name
:
6736 part_die
->name
= DW_STRING (&attr
);
6739 has_low_pc_attr
= 1;
6740 part_die
->lowpc
= DW_ADDR (&attr
);
6743 has_high_pc_attr
= 1;
6744 part_die
->highpc
= DW_ADDR (&attr
);
6746 case DW_AT_location
:
6747 /* Support the .debug_loc offsets */
6748 if (attr_form_is_block (&attr
))
6750 part_die
->locdesc
= DW_BLOCK (&attr
);
6752 else if (attr_form_is_section_offset (&attr
))
6754 dwarf2_complex_location_expr_complaint ();
6758 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6759 "partial symbol information");
6762 case DW_AT_external
:
6763 part_die
->is_external
= DW_UNSND (&attr
);
6765 case DW_AT_declaration
:
6766 part_die
->is_declaration
= DW_UNSND (&attr
);
6769 part_die
->has_type
= 1;
6771 case DW_AT_abstract_origin
:
6772 case DW_AT_specification
:
6773 case DW_AT_extension
:
6774 part_die
->has_specification
= 1;
6775 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6778 /* Ignore absolute siblings, they might point outside of
6779 the current compile unit. */
6780 if (attr
.form
== DW_FORM_ref_addr
)
6781 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6783 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6785 case DW_AT_byte_size
:
6786 part_die
->has_byte_size
= 1;
6788 case DW_AT_calling_convention
:
6789 /* DWARF doesn't provide a way to identify a program's source-level
6790 entry point. DW_AT_calling_convention attributes are only meant
6791 to describe functions' calling conventions.
6793 However, because it's a necessary piece of information in
6794 Fortran, and because DW_CC_program is the only piece of debugging
6795 information whose definition refers to a 'main program' at all,
6796 several compilers have begun marking Fortran main programs with
6797 DW_CC_program --- even when those functions use the standard
6798 calling conventions.
6800 So until DWARF specifies a way to provide this information and
6801 compilers pick up the new representation, we'll support this
6803 if (DW_UNSND (&attr
) == DW_CC_program
6804 && cu
->language
== language_fortran
)
6805 set_main_name (part_die
->name
);
6812 /* When using the GNU linker, .gnu.linkonce. sections are used to
6813 eliminate duplicate copies of functions and vtables and such.
6814 The linker will arbitrarily choose one and discard the others.
6815 The AT_*_pc values for such functions refer to local labels in
6816 these sections. If the section from that file was discarded, the
6817 labels are not in the output, so the relocs get a value of 0.
6818 If this is a discarded function, mark the pc bounds as invalid,
6819 so that GDB will ignore it. */
6820 if (has_low_pc_attr
&& has_high_pc_attr
6821 && part_die
->lowpc
< part_die
->highpc
6822 && (part_die
->lowpc
!= 0
6823 || dwarf2_per_objfile
->has_section_at_zero
))
6824 part_die
->has_pc_info
= 1;
6829 /* Find a cached partial DIE at OFFSET in CU. */
6831 static struct partial_die_info
*
6832 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6834 struct partial_die_info
*lookup_die
= NULL
;
6835 struct partial_die_info part_die
;
6837 part_die
.offset
= offset
;
6838 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6843 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6844 except in the case of .debug_types DIEs which do not reference
6845 outside their CU (they do however referencing other types via
6848 static struct partial_die_info
*
6849 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6851 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6852 struct partial_die_info
*pd
= NULL
;
6854 if (cu
->per_cu
->from_debug_types
)
6856 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6862 if (offset_in_cu_p (&cu
->header
, offset
))
6864 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6869 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6871 if (per_cu
->cu
== NULL
)
6873 load_partial_comp_unit (per_cu
, cu
->objfile
);
6874 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6875 dwarf2_per_objfile
->read_in_chain
= per_cu
;
6878 per_cu
->cu
->last_used
= 0;
6879 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6881 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
6883 struct cleanup
*back_to
;
6884 struct partial_die_info comp_unit_die
;
6885 struct abbrev_info
*abbrev
;
6886 unsigned int bytes_read
;
6889 per_cu
->load_all_dies
= 1;
6891 /* Re-read the DIEs. */
6892 back_to
= make_cleanup (null_cleanup
, 0);
6893 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6895 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6896 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6898 info_ptr
= (dwarf2_per_objfile
->info
.buffer
6899 + per_cu
->cu
->header
.offset
6900 + per_cu
->cu
->header
.first_die_offset
);
6901 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6902 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6903 per_cu
->cu
->objfile
->obfd
,
6904 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6906 if (comp_unit_die
.has_children
)
6907 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
6908 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6910 do_cleanups (back_to
);
6912 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6918 internal_error (__FILE__
, __LINE__
,
6919 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6920 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6924 /* Adjust PART_DIE before generating a symbol for it. This function
6925 may set the is_external flag or change the DIE's name. */
6928 fixup_partial_die (struct partial_die_info
*part_die
,
6929 struct dwarf2_cu
*cu
)
6931 /* If we found a reference attribute and the DIE has no name, try
6932 to find a name in the referred to DIE. */
6934 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6936 struct partial_die_info
*spec_die
;
6938 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6940 fixup_partial_die (spec_die
, cu
);
6944 part_die
->name
= spec_die
->name
;
6946 /* Copy DW_AT_external attribute if it is set. */
6947 if (spec_die
->is_external
)
6948 part_die
->is_external
= spec_die
->is_external
;
6952 /* Set default names for some unnamed DIEs. */
6953 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6954 || part_die
->tag
== DW_TAG_class_type
))
6955 part_die
->name
= "(anonymous class)";
6957 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6958 part_die
->name
= "(anonymous namespace)";
6960 if (part_die
->tag
== DW_TAG_structure_type
6961 || part_die
->tag
== DW_TAG_class_type
6962 || part_die
->tag
== DW_TAG_union_type
)
6963 guess_structure_name (part_die
, cu
);
6966 /* Read an attribute value described by an attribute form. */
6969 read_attribute_value (struct attribute
*attr
, unsigned form
,
6970 bfd
*abfd
, gdb_byte
*info_ptr
,
6971 struct dwarf2_cu
*cu
)
6973 struct comp_unit_head
*cu_header
= &cu
->header
;
6974 unsigned int bytes_read
;
6975 struct dwarf_block
*blk
;
6981 case DW_FORM_ref_addr
:
6982 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
6983 info_ptr
+= bytes_read
;
6985 case DW_FORM_block2
:
6986 blk
= dwarf_alloc_block (cu
);
6987 blk
->size
= read_2_bytes (abfd
, info_ptr
);
6989 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6990 info_ptr
+= blk
->size
;
6991 DW_BLOCK (attr
) = blk
;
6993 case DW_FORM_block4
:
6994 blk
= dwarf_alloc_block (cu
);
6995 blk
->size
= read_4_bytes (abfd
, info_ptr
);
6997 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6998 info_ptr
+= blk
->size
;
6999 DW_BLOCK (attr
) = blk
;
7002 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7006 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7010 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7013 case DW_FORM_string
:
7014 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7015 DW_STRING_IS_CANONICAL (attr
) = 0;
7016 info_ptr
+= bytes_read
;
7019 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7021 DW_STRING_IS_CANONICAL (attr
) = 0;
7022 info_ptr
+= bytes_read
;
7025 blk
= dwarf_alloc_block (cu
);
7026 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7027 info_ptr
+= bytes_read
;
7028 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7029 info_ptr
+= blk
->size
;
7030 DW_BLOCK (attr
) = blk
;
7032 case DW_FORM_block1
:
7033 blk
= dwarf_alloc_block (cu
);
7034 blk
->size
= read_1_byte (abfd
, info_ptr
);
7036 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7037 info_ptr
+= blk
->size
;
7038 DW_BLOCK (attr
) = blk
;
7041 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7045 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7049 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7050 info_ptr
+= bytes_read
;
7053 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7054 info_ptr
+= bytes_read
;
7057 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7061 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7065 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7069 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7073 /* Convert the signature to something we can record in DW_UNSND
7075 NOTE: This is NULL if the type wasn't found. */
7076 DW_SIGNATURED_TYPE (attr
) =
7077 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7080 case DW_FORM_ref_udata
:
7081 DW_ADDR (attr
) = (cu
->header
.offset
7082 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7083 info_ptr
+= bytes_read
;
7085 case DW_FORM_indirect
:
7086 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7087 info_ptr
+= bytes_read
;
7088 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7091 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7092 dwarf_form_name (form
),
7093 bfd_get_filename (abfd
));
7096 /* We have seen instances where the compiler tried to emit a byte
7097 size attribute of -1 which ended up being encoded as an unsigned
7098 0xffffffff. Although 0xffffffff is technically a valid size value,
7099 an object of this size seems pretty unlikely so we can relatively
7100 safely treat these cases as if the size attribute was invalid and
7101 treat them as zero by default. */
7102 if (attr
->name
== DW_AT_byte_size
7103 && form
== DW_FORM_data4
7104 && DW_UNSND (attr
) >= 0xffffffff)
7107 (&symfile_complaints
,
7108 _("Suspicious DW_AT_byte_size value treated as zero instead of 0x%lx"),
7110 DW_UNSND (attr
) = 0;
7116 /* Read an attribute described by an abbreviated attribute. */
7119 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7120 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7122 attr
->name
= abbrev
->name
;
7123 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7126 /* read dwarf information from a buffer */
7129 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7131 return bfd_get_8 (abfd
, buf
);
7135 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7137 return bfd_get_signed_8 (abfd
, buf
);
7141 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7143 return bfd_get_16 (abfd
, buf
);
7147 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7149 return bfd_get_signed_16 (abfd
, buf
);
7153 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7155 return bfd_get_32 (abfd
, buf
);
7159 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7161 return bfd_get_signed_32 (abfd
, buf
);
7165 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7167 return bfd_get_64 (abfd
, buf
);
7171 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7172 unsigned int *bytes_read
)
7174 struct comp_unit_head
*cu_header
= &cu
->header
;
7175 CORE_ADDR retval
= 0;
7177 if (cu_header
->signed_addr_p
)
7179 switch (cu_header
->addr_size
)
7182 retval
= bfd_get_signed_16 (abfd
, buf
);
7185 retval
= bfd_get_signed_32 (abfd
, buf
);
7188 retval
= bfd_get_signed_64 (abfd
, buf
);
7191 internal_error (__FILE__
, __LINE__
,
7192 _("read_address: bad switch, signed [in module %s]"),
7193 bfd_get_filename (abfd
));
7198 switch (cu_header
->addr_size
)
7201 retval
= bfd_get_16 (abfd
, buf
);
7204 retval
= bfd_get_32 (abfd
, buf
);
7207 retval
= bfd_get_64 (abfd
, buf
);
7210 internal_error (__FILE__
, __LINE__
,
7211 _("read_address: bad switch, unsigned [in module %s]"),
7212 bfd_get_filename (abfd
));
7216 *bytes_read
= cu_header
->addr_size
;
7220 /* Read the initial length from a section. The (draft) DWARF 3
7221 specification allows the initial length to take up either 4 bytes
7222 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7223 bytes describe the length and all offsets will be 8 bytes in length
7226 An older, non-standard 64-bit format is also handled by this
7227 function. The older format in question stores the initial length
7228 as an 8-byte quantity without an escape value. Lengths greater
7229 than 2^32 aren't very common which means that the initial 4 bytes
7230 is almost always zero. Since a length value of zero doesn't make
7231 sense for the 32-bit format, this initial zero can be considered to
7232 be an escape value which indicates the presence of the older 64-bit
7233 format. As written, the code can't detect (old format) lengths
7234 greater than 4GB. If it becomes necessary to handle lengths
7235 somewhat larger than 4GB, we could allow other small values (such
7236 as the non-sensical values of 1, 2, and 3) to also be used as
7237 escape values indicating the presence of the old format.
7239 The value returned via bytes_read should be used to increment the
7240 relevant pointer after calling read_initial_length().
7242 [ Note: read_initial_length() and read_offset() are based on the
7243 document entitled "DWARF Debugging Information Format", revision
7244 3, draft 8, dated November 19, 2001. This document was obtained
7247 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7249 This document is only a draft and is subject to change. (So beware.)
7251 Details regarding the older, non-standard 64-bit format were
7252 determined empirically by examining 64-bit ELF files produced by
7253 the SGI toolchain on an IRIX 6.5 machine.
7255 - Kevin, July 16, 2002
7259 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7261 LONGEST length
= bfd_get_32 (abfd
, buf
);
7263 if (length
== 0xffffffff)
7265 length
= bfd_get_64 (abfd
, buf
+ 4);
7268 else if (length
== 0)
7270 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7271 length
= bfd_get_64 (abfd
, buf
);
7282 /* Cover function for read_initial_length.
7283 Returns the length of the object at BUF, and stores the size of the
7284 initial length in *BYTES_READ and stores the size that offsets will be in
7286 If the initial length size is not equivalent to that specified in
7287 CU_HEADER then issue a complaint.
7288 This is useful when reading non-comp-unit headers. */
7291 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7292 const struct comp_unit_head
*cu_header
,
7293 unsigned int *bytes_read
,
7294 unsigned int *offset_size
)
7296 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7298 gdb_assert (cu_header
->initial_length_size
== 4
7299 || cu_header
->initial_length_size
== 8
7300 || cu_header
->initial_length_size
== 12);
7302 if (cu_header
->initial_length_size
!= *bytes_read
)
7303 complaint (&symfile_complaints
,
7304 _("intermixed 32-bit and 64-bit DWARF sections"));
7306 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7310 /* Read an offset from the data stream. The size of the offset is
7311 given by cu_header->offset_size. */
7314 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7315 unsigned int *bytes_read
)
7317 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7318 *bytes_read
= cu_header
->offset_size
;
7322 /* Read an offset from the data stream. */
7325 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7329 switch (offset_size
)
7332 retval
= bfd_get_32 (abfd
, buf
);
7335 retval
= bfd_get_64 (abfd
, buf
);
7338 internal_error (__FILE__
, __LINE__
,
7339 _("read_offset_1: bad switch [in module %s]"),
7340 bfd_get_filename (abfd
));
7347 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7349 /* If the size of a host char is 8 bits, we can return a pointer
7350 to the buffer, otherwise we have to copy the data to a buffer
7351 allocated on the temporary obstack. */
7352 gdb_assert (HOST_CHAR_BIT
== 8);
7357 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7359 /* If the size of a host char is 8 bits, we can return a pointer
7360 to the string, otherwise we have to copy the string to a buffer
7361 allocated on the temporary obstack. */
7362 gdb_assert (HOST_CHAR_BIT
== 8);
7365 *bytes_read_ptr
= 1;
7368 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7369 return (char *) buf
;
7373 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7374 const struct comp_unit_head
*cu_header
,
7375 unsigned int *bytes_read_ptr
)
7377 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7379 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7381 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7382 bfd_get_filename (abfd
));
7385 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7387 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7388 bfd_get_filename (abfd
));
7391 gdb_assert (HOST_CHAR_BIT
== 8);
7392 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7394 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7397 static unsigned long
7398 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7400 unsigned long result
;
7401 unsigned int num_read
;
7411 byte
= bfd_get_8 (abfd
, buf
);
7414 result
|= ((unsigned long)(byte
& 127) << shift
);
7415 if ((byte
& 128) == 0)
7421 *bytes_read_ptr
= num_read
;
7426 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7429 int i
, shift
, num_read
;
7438 byte
= bfd_get_8 (abfd
, buf
);
7441 result
|= ((long)(byte
& 127) << shift
);
7443 if ((byte
& 128) == 0)
7448 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7449 result
|= -(((long)1) << shift
);
7450 *bytes_read_ptr
= num_read
;
7454 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7457 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7463 byte
= bfd_get_8 (abfd
, buf
);
7465 if ((byte
& 128) == 0)
7471 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7478 cu
->language
= language_c
;
7480 case DW_LANG_C_plus_plus
:
7481 cu
->language
= language_cplus
;
7483 case DW_LANG_Fortran77
:
7484 case DW_LANG_Fortran90
:
7485 case DW_LANG_Fortran95
:
7486 cu
->language
= language_fortran
;
7488 case DW_LANG_Mips_Assembler
:
7489 cu
->language
= language_asm
;
7492 cu
->language
= language_java
;
7496 cu
->language
= language_ada
;
7498 case DW_LANG_Modula2
:
7499 cu
->language
= language_m2
;
7501 case DW_LANG_Pascal83
:
7502 cu
->language
= language_pascal
;
7505 cu
->language
= language_objc
;
7507 case DW_LANG_Cobol74
:
7508 case DW_LANG_Cobol85
:
7510 cu
->language
= language_minimal
;
7513 cu
->language_defn
= language_def (cu
->language
);
7516 /* Return the named attribute or NULL if not there. */
7518 static struct attribute
*
7519 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7522 struct attribute
*spec
= NULL
;
7524 for (i
= 0; i
< die
->num_attrs
; ++i
)
7526 if (die
->attrs
[i
].name
== name
)
7527 return &die
->attrs
[i
];
7528 if (die
->attrs
[i
].name
== DW_AT_specification
7529 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7530 spec
= &die
->attrs
[i
];
7535 die
= follow_die_ref (die
, spec
, &cu
);
7536 return dwarf2_attr (die
, name
, cu
);
7542 /* Return the named attribute or NULL if not there,
7543 but do not follow DW_AT_specification, etc.
7544 This is for use in contexts where we're reading .debug_types dies.
7545 Following DW_AT_specification, DW_AT_abstract_origin will take us
7546 back up the chain, and we want to go down. */
7548 static struct attribute
*
7549 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7550 struct dwarf2_cu
*cu
)
7554 for (i
= 0; i
< die
->num_attrs
; ++i
)
7555 if (die
->attrs
[i
].name
== name
)
7556 return &die
->attrs
[i
];
7561 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7562 and holds a non-zero value. This function should only be used for
7563 DW_FORM_flag attributes. */
7566 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7568 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7570 return (attr
&& DW_UNSND (attr
));
7574 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7576 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7577 which value is non-zero. However, we have to be careful with
7578 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7579 (via dwarf2_flag_true_p) follows this attribute. So we may
7580 end up accidently finding a declaration attribute that belongs
7581 to a different DIE referenced by the specification attribute,
7582 even though the given DIE does not have a declaration attribute. */
7583 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7584 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7587 /* Return the die giving the specification for DIE, if there is
7588 one. *SPEC_CU is the CU containing DIE on input, and the CU
7589 containing the return value on output. If there is no
7590 specification, but there is an abstract origin, that is
7593 static struct die_info
*
7594 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7596 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7599 if (spec_attr
== NULL
)
7600 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7602 if (spec_attr
== NULL
)
7605 return follow_die_ref (die
, spec_attr
, spec_cu
);
7608 /* Free the line_header structure *LH, and any arrays and strings it
7611 free_line_header (struct line_header
*lh
)
7613 if (lh
->standard_opcode_lengths
)
7614 xfree (lh
->standard_opcode_lengths
);
7616 /* Remember that all the lh->file_names[i].name pointers are
7617 pointers into debug_line_buffer, and don't need to be freed. */
7619 xfree (lh
->file_names
);
7621 /* Similarly for the include directory names. */
7622 if (lh
->include_dirs
)
7623 xfree (lh
->include_dirs
);
7629 /* Add an entry to LH's include directory table. */
7631 add_include_dir (struct line_header
*lh
, char *include_dir
)
7633 /* Grow the array if necessary. */
7634 if (lh
->include_dirs_size
== 0)
7636 lh
->include_dirs_size
= 1; /* for testing */
7637 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7638 * sizeof (*lh
->include_dirs
));
7640 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7642 lh
->include_dirs_size
*= 2;
7643 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7644 (lh
->include_dirs_size
7645 * sizeof (*lh
->include_dirs
)));
7648 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7652 /* Add an entry to LH's file name table. */
7654 add_file_name (struct line_header
*lh
,
7656 unsigned int dir_index
,
7657 unsigned int mod_time
,
7658 unsigned int length
)
7660 struct file_entry
*fe
;
7662 /* Grow the array if necessary. */
7663 if (lh
->file_names_size
== 0)
7665 lh
->file_names_size
= 1; /* for testing */
7666 lh
->file_names
= xmalloc (lh
->file_names_size
7667 * sizeof (*lh
->file_names
));
7669 else if (lh
->num_file_names
>= lh
->file_names_size
)
7671 lh
->file_names_size
*= 2;
7672 lh
->file_names
= xrealloc (lh
->file_names
,
7673 (lh
->file_names_size
7674 * sizeof (*lh
->file_names
)));
7677 fe
= &lh
->file_names
[lh
->num_file_names
++];
7679 fe
->dir_index
= dir_index
;
7680 fe
->mod_time
= mod_time
;
7681 fe
->length
= length
;
7687 /* Read the statement program header starting at OFFSET in
7688 .debug_line, according to the endianness of ABFD. Return a pointer
7689 to a struct line_header, allocated using xmalloc.
7691 NOTE: the strings in the include directory and file name tables of
7692 the returned object point into debug_line_buffer, and must not be
7694 static struct line_header
*
7695 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7696 struct dwarf2_cu
*cu
)
7698 struct cleanup
*back_to
;
7699 struct line_header
*lh
;
7701 unsigned int bytes_read
, offset_size
;
7703 char *cur_dir
, *cur_file
;
7705 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7707 complaint (&symfile_complaints
, _("missing .debug_line section"));
7711 /* Make sure that at least there's room for the total_length field.
7712 That could be 12 bytes long, but we're just going to fudge that. */
7713 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7715 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7719 lh
= xmalloc (sizeof (*lh
));
7720 memset (lh
, 0, sizeof (*lh
));
7721 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7724 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7726 /* Read in the header. */
7728 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7729 &bytes_read
, &offset_size
);
7730 line_ptr
+= bytes_read
;
7731 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7732 + dwarf2_per_objfile
->line
.size
))
7734 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7737 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7738 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7740 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7741 line_ptr
+= offset_size
;
7742 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7744 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7746 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7748 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7750 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7752 lh
->standard_opcode_lengths
7753 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7755 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7756 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7758 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7762 /* Read directory table. */
7763 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7765 line_ptr
+= bytes_read
;
7766 add_include_dir (lh
, cur_dir
);
7768 line_ptr
+= bytes_read
;
7770 /* Read file name table. */
7771 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7773 unsigned int dir_index
, mod_time
, length
;
7775 line_ptr
+= bytes_read
;
7776 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7777 line_ptr
+= bytes_read
;
7778 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7779 line_ptr
+= bytes_read
;
7780 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7781 line_ptr
+= bytes_read
;
7783 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7785 line_ptr
+= bytes_read
;
7786 lh
->statement_program_start
= line_ptr
;
7788 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7789 + dwarf2_per_objfile
->line
.size
))
7790 complaint (&symfile_complaints
,
7791 _("line number info header doesn't fit in `.debug_line' section"));
7793 discard_cleanups (back_to
);
7797 /* This function exists to work around a bug in certain compilers
7798 (particularly GCC 2.95), in which the first line number marker of a
7799 function does not show up until after the prologue, right before
7800 the second line number marker. This function shifts ADDRESS down
7801 to the beginning of the function if necessary, and is called on
7802 addresses passed to record_line. */
7805 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7807 struct function_range
*fn
;
7809 /* Find the function_range containing address. */
7814 cu
->cached_fn
= cu
->first_fn
;
7818 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7824 while (fn
&& fn
!= cu
->cached_fn
)
7825 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7835 if (address
!= fn
->lowpc
)
7836 complaint (&symfile_complaints
,
7837 _("misplaced first line number at 0x%lx for '%s'"),
7838 (unsigned long) address
, fn
->name
);
7843 /* Decode the Line Number Program (LNP) for the given line_header
7844 structure and CU. The actual information extracted and the type
7845 of structures created from the LNP depends on the value of PST.
7847 1. If PST is NULL, then this procedure uses the data from the program
7848 to create all necessary symbol tables, and their linetables.
7849 The compilation directory of the file is passed in COMP_DIR,
7850 and must not be NULL.
7852 2. If PST is not NULL, this procedure reads the program to determine
7853 the list of files included by the unit represented by PST, and
7854 builds all the associated partial symbol tables. In this case,
7855 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7856 is not used to compute the full name of the symtab, and therefore
7857 omitting it when building the partial symtab does not introduce
7858 the potential for inconsistency - a partial symtab and its associated
7859 symbtab having a different fullname -). */
7862 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
7863 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
7865 gdb_byte
*line_ptr
, *extended_end
;
7867 unsigned int bytes_read
, extended_len
;
7868 unsigned char op_code
, extended_op
, adj_opcode
;
7870 struct objfile
*objfile
= cu
->objfile
;
7871 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7872 const int decode_for_pst_p
= (pst
!= NULL
);
7873 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
7875 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7877 line_ptr
= lh
->statement_program_start
;
7878 line_end
= lh
->statement_program_end
;
7880 /* Read the statement sequences until there's nothing left. */
7881 while (line_ptr
< line_end
)
7883 /* state machine registers */
7884 CORE_ADDR address
= 0;
7885 unsigned int file
= 1;
7886 unsigned int line
= 1;
7887 unsigned int column
= 0;
7888 int is_stmt
= lh
->default_is_stmt
;
7889 int basic_block
= 0;
7890 int end_sequence
= 0;
7893 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7895 /* Start a subfile for the current file of the state machine. */
7896 /* lh->include_dirs and lh->file_names are 0-based, but the
7897 directory and file name numbers in the statement program
7899 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7903 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7905 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7908 /* Decode the table. */
7909 while (!end_sequence
)
7911 op_code
= read_1_byte (abfd
, line_ptr
);
7913 if (line_ptr
> line_end
)
7915 dwarf2_debug_line_missing_end_sequence_complaint ();
7919 if (op_code
>= lh
->opcode_base
)
7921 /* Special operand. */
7922 adj_opcode
= op_code
- lh
->opcode_base
;
7923 address
+= (adj_opcode
/ lh
->line_range
)
7924 * lh
->minimum_instruction_length
;
7925 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7926 if (lh
->num_file_names
< file
|| file
== 0)
7927 dwarf2_debug_line_missing_file_complaint ();
7930 lh
->file_names
[file
- 1].included_p
= 1;
7931 if (!decode_for_pst_p
&& is_stmt
)
7933 if (last_subfile
!= current_subfile
)
7935 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7937 record_line (last_subfile
, 0, addr
);
7938 last_subfile
= current_subfile
;
7940 /* Append row to matrix using current values. */
7941 addr
= check_cu_functions (address
, cu
);
7942 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7943 record_line (current_subfile
, line
, addr
);
7948 else switch (op_code
)
7950 case DW_LNS_extended_op
:
7951 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7952 line_ptr
+= bytes_read
;
7953 extended_end
= line_ptr
+ extended_len
;
7954 extended_op
= read_1_byte (abfd
, line_ptr
);
7956 switch (extended_op
)
7958 case DW_LNE_end_sequence
:
7961 case DW_LNE_set_address
:
7962 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7963 line_ptr
+= bytes_read
;
7964 address
+= baseaddr
;
7966 case DW_LNE_define_file
:
7969 unsigned int dir_index
, mod_time
, length
;
7971 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
7972 line_ptr
+= bytes_read
;
7974 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7975 line_ptr
+= bytes_read
;
7977 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7978 line_ptr
+= bytes_read
;
7980 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7981 line_ptr
+= bytes_read
;
7982 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7985 case DW_LNE_set_discriminator
:
7986 /* The discriminator is not interesting to the debugger;
7988 line_ptr
= extended_end
;
7991 complaint (&symfile_complaints
,
7992 _("mangled .debug_line section"));
7995 /* Make sure that we parsed the extended op correctly. If e.g.
7996 we expected a different address size than the producer used,
7997 we may have read the wrong number of bytes. */
7998 if (line_ptr
!= extended_end
)
8000 complaint (&symfile_complaints
,
8001 _("mangled .debug_line section"));
8006 if (lh
->num_file_names
< file
|| file
== 0)
8007 dwarf2_debug_line_missing_file_complaint ();
8010 lh
->file_names
[file
- 1].included_p
= 1;
8011 if (!decode_for_pst_p
&& is_stmt
)
8013 if (last_subfile
!= current_subfile
)
8015 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8017 record_line (last_subfile
, 0, addr
);
8018 last_subfile
= current_subfile
;
8020 addr
= check_cu_functions (address
, cu
);
8021 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8022 record_line (current_subfile
, line
, addr
);
8027 case DW_LNS_advance_pc
:
8028 address
+= lh
->minimum_instruction_length
8029 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8030 line_ptr
+= bytes_read
;
8032 case DW_LNS_advance_line
:
8033 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8034 line_ptr
+= bytes_read
;
8036 case DW_LNS_set_file
:
8038 /* The arrays lh->include_dirs and lh->file_names are
8039 0-based, but the directory and file name numbers in
8040 the statement program are 1-based. */
8041 struct file_entry
*fe
;
8044 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8045 line_ptr
+= bytes_read
;
8046 if (lh
->num_file_names
< file
|| file
== 0)
8047 dwarf2_debug_line_missing_file_complaint ();
8050 fe
= &lh
->file_names
[file
- 1];
8052 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8053 if (!decode_for_pst_p
)
8055 last_subfile
= current_subfile
;
8056 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8061 case DW_LNS_set_column
:
8062 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8063 line_ptr
+= bytes_read
;
8065 case DW_LNS_negate_stmt
:
8066 is_stmt
= (!is_stmt
);
8068 case DW_LNS_set_basic_block
:
8071 /* Add to the address register of the state machine the
8072 address increment value corresponding to special opcode
8073 255. I.e., this value is scaled by the minimum
8074 instruction length since special opcode 255 would have
8075 scaled the the increment. */
8076 case DW_LNS_const_add_pc
:
8077 address
+= (lh
->minimum_instruction_length
8078 * ((255 - lh
->opcode_base
) / lh
->line_range
));
8080 case DW_LNS_fixed_advance_pc
:
8081 address
+= read_2_bytes (abfd
, line_ptr
);
8086 /* Unknown standard opcode, ignore it. */
8089 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8091 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8092 line_ptr
+= bytes_read
;
8097 if (lh
->num_file_names
< file
|| file
== 0)
8098 dwarf2_debug_line_missing_file_complaint ();
8101 lh
->file_names
[file
- 1].included_p
= 1;
8102 if (!decode_for_pst_p
)
8104 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8105 record_line (current_subfile
, 0, addr
);
8110 if (decode_for_pst_p
)
8114 /* Now that we're done scanning the Line Header Program, we can
8115 create the psymtab of each included file. */
8116 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8117 if (lh
->file_names
[file_index
].included_p
== 1)
8119 const struct file_entry fe
= lh
->file_names
[file_index
];
8120 char *include_name
= fe
.name
;
8121 char *dir_name
= NULL
;
8122 char *pst_filename
= pst
->filename
;
8125 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8127 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8129 include_name
= concat (dir_name
, SLASH_STRING
,
8130 include_name
, (char *)NULL
);
8131 make_cleanup (xfree
, include_name
);
8134 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8136 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8137 pst_filename
, (char *)NULL
);
8138 make_cleanup (xfree
, pst_filename
);
8141 if (strcmp (include_name
, pst_filename
) != 0)
8142 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8147 /* Make sure a symtab is created for every file, even files
8148 which contain only variables (i.e. no code with associated
8152 struct file_entry
*fe
;
8154 for (i
= 0; i
< lh
->num_file_names
; i
++)
8157 fe
= &lh
->file_names
[i
];
8159 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8160 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8162 /* Skip the main file; we don't need it, and it must be
8163 allocated last, so that it will show up before the
8164 non-primary symtabs in the objfile's symtab list. */
8165 if (current_subfile
== first_subfile
)
8168 if (current_subfile
->symtab
== NULL
)
8169 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8171 fe
->symtab
= current_subfile
->symtab
;
8176 /* Start a subfile for DWARF. FILENAME is the name of the file and
8177 DIRNAME the name of the source directory which contains FILENAME
8178 or NULL if not known. COMP_DIR is the compilation directory for the
8179 linetable's compilation unit or NULL if not known.
8180 This routine tries to keep line numbers from identical absolute and
8181 relative file names in a common subfile.
8183 Using the `list' example from the GDB testsuite, which resides in
8184 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8185 of /srcdir/list0.c yields the following debugging information for list0.c:
8187 DW_AT_name: /srcdir/list0.c
8188 DW_AT_comp_dir: /compdir
8189 files.files[0].name: list0.h
8190 files.files[0].dir: /srcdir
8191 files.files[1].name: list0.c
8192 files.files[1].dir: /srcdir
8194 The line number information for list0.c has to end up in a single
8195 subfile, so that `break /srcdir/list0.c:1' works as expected.
8196 start_subfile will ensure that this happens provided that we pass the
8197 concatenation of files.files[1].dir and files.files[1].name as the
8201 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8205 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8206 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8207 second argument to start_subfile. To be consistent, we do the
8208 same here. In order not to lose the line information directory,
8209 we concatenate it to the filename when it makes sense.
8210 Note that the Dwarf3 standard says (speaking of filenames in line
8211 information): ``The directory index is ignored for file names
8212 that represent full path names''. Thus ignoring dirname in the
8213 `else' branch below isn't an issue. */
8215 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8216 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8218 fullname
= filename
;
8220 start_subfile (fullname
, comp_dir
);
8222 if (fullname
!= filename
)
8227 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8228 struct dwarf2_cu
*cu
)
8230 struct objfile
*objfile
= cu
->objfile
;
8231 struct comp_unit_head
*cu_header
= &cu
->header
;
8233 /* NOTE drow/2003-01-30: There used to be a comment and some special
8234 code here to turn a symbol with DW_AT_external and a
8235 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8236 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8237 with some versions of binutils) where shared libraries could have
8238 relocations against symbols in their debug information - the
8239 minimal symbol would have the right address, but the debug info
8240 would not. It's no longer necessary, because we will explicitly
8241 apply relocations when we read in the debug information now. */
8243 /* A DW_AT_location attribute with no contents indicates that a
8244 variable has been optimized away. */
8245 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8247 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8251 /* Handle one degenerate form of location expression specially, to
8252 preserve GDB's previous behavior when section offsets are
8253 specified. If this is just a DW_OP_addr then mark this symbol
8256 if (attr_form_is_block (attr
)
8257 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8258 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8262 SYMBOL_VALUE_ADDRESS (sym
) =
8263 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8264 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8265 fixup_symbol_section (sym
, objfile
);
8266 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8267 SYMBOL_SECTION (sym
));
8271 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8272 expression evaluator, and use LOC_COMPUTED only when necessary
8273 (i.e. when the value of a register or memory location is
8274 referenced, or a thread-local block, etc.). Then again, it might
8275 not be worthwhile. I'm assuming that it isn't unless performance
8276 or memory numbers show me otherwise. */
8278 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8279 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8282 /* Given a pointer to a DWARF information entry, figure out if we need
8283 to make a symbol table entry for it, and if so, create a new entry
8284 and return a pointer to it.
8285 If TYPE is NULL, determine symbol type from the die, otherwise
8286 used the passed type. */
8288 static struct symbol
*
8289 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8291 struct objfile
*objfile
= cu
->objfile
;
8292 struct symbol
*sym
= NULL
;
8294 struct attribute
*attr
= NULL
;
8295 struct attribute
*attr2
= NULL
;
8297 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8299 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8301 if (die
->tag
!= DW_TAG_namespace
)
8302 name
= dwarf2_linkage_name (die
, cu
);
8304 name
= TYPE_NAME (type
);
8308 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8309 sizeof (struct symbol
));
8310 OBJSTAT (objfile
, n_syms
++);
8311 memset (sym
, 0, sizeof (struct symbol
));
8313 /* Cache this symbol's name and the name's demangled form (if any). */
8314 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8315 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
8317 /* Default assumptions.
8318 Use the passed type or decode it from the die. */
8319 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8320 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8322 SYMBOL_TYPE (sym
) = type
;
8324 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8325 attr
= dwarf2_attr (die
,
8326 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8330 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8333 attr
= dwarf2_attr (die
,
8334 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8338 int file_index
= DW_UNSND (attr
);
8339 if (cu
->line_header
== NULL
8340 || file_index
> cu
->line_header
->num_file_names
)
8341 complaint (&symfile_complaints
,
8342 _("file index out of range"));
8343 else if (file_index
> 0)
8345 struct file_entry
*fe
;
8346 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8347 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8354 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8357 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8359 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8361 case DW_TAG_subprogram
:
8362 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8364 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8365 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8366 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8367 || cu
->language
== language_ada
)
8369 /* Subprograms marked external are stored as a global symbol.
8370 Ada subprograms, whether marked external or not, are always
8371 stored as a global symbol, because we want to be able to
8372 access them globally. For instance, we want to be able
8373 to break on a nested subprogram without having to
8374 specify the context. */
8375 add_symbol_to_list (sym
, &global_symbols
);
8379 add_symbol_to_list (sym
, cu
->list_in_scope
);
8382 case DW_TAG_inlined_subroutine
:
8383 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8385 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8386 SYMBOL_INLINED (sym
) = 1;
8387 /* Do not add the symbol to any lists. It will be found via
8388 BLOCK_FUNCTION from the blockvector. */
8390 case DW_TAG_variable
:
8391 /* Compilation with minimal debug info may result in variables
8392 with missing type entries. Change the misleading `void' type
8393 to something sensible. */
8394 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8396 = objfile_type (objfile
)->nodebug_data_symbol
;
8398 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8401 dwarf2_const_value (attr
, sym
, cu
);
8402 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8403 if (attr2
&& (DW_UNSND (attr2
) != 0))
8404 add_symbol_to_list (sym
, &global_symbols
);
8406 add_symbol_to_list (sym
, cu
->list_in_scope
);
8409 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8412 var_decode_location (attr
, sym
, cu
);
8413 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8414 if (attr2
&& (DW_UNSND (attr2
) != 0))
8415 add_symbol_to_list (sym
, &global_symbols
);
8417 add_symbol_to_list (sym
, cu
->list_in_scope
);
8421 /* We do not know the address of this symbol.
8422 If it is an external symbol and we have type information
8423 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8424 The address of the variable will then be determined from
8425 the minimal symbol table whenever the variable is
8427 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8428 if (attr2
&& (DW_UNSND (attr2
) != 0)
8429 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8431 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8432 add_symbol_to_list (sym
, cu
->list_in_scope
);
8434 else if (!die_is_declaration (die
, cu
))
8436 /* Use the default LOC_OPTIMIZED_OUT class. */
8437 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8438 add_symbol_to_list (sym
, cu
->list_in_scope
);
8442 case DW_TAG_formal_parameter
:
8443 /* If we are inside a function, mark this as an argument. If
8444 not, we might be looking at an argument to an inlined function
8445 when we do not have enough information to show inlined frames;
8446 pretend it's a local variable in that case so that the user can
8448 if (context_stack_depth
> 0
8449 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8450 SYMBOL_IS_ARGUMENT (sym
) = 1;
8451 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8454 var_decode_location (attr
, sym
, cu
);
8456 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8459 dwarf2_const_value (attr
, sym
, cu
);
8461 add_symbol_to_list (sym
, cu
->list_in_scope
);
8463 case DW_TAG_unspecified_parameters
:
8464 /* From varargs functions; gdb doesn't seem to have any
8465 interest in this information, so just ignore it for now.
8468 case DW_TAG_class_type
:
8469 case DW_TAG_interface_type
:
8470 case DW_TAG_structure_type
:
8471 case DW_TAG_union_type
:
8472 case DW_TAG_set_type
:
8473 case DW_TAG_enumeration_type
:
8474 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8475 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8477 /* Make sure that the symbol includes appropriate enclosing
8478 classes/namespaces in its name. These are calculated in
8479 read_structure_type, and the correct name is saved in
8482 if (cu
->language
== language_cplus
8483 || cu
->language
== language_java
)
8485 struct type
*type
= SYMBOL_TYPE (sym
);
8487 if (TYPE_TAG_NAME (type
) != NULL
)
8489 /* FIXME: carlton/2003-11-10: Should this use
8490 SYMBOL_SET_NAMES instead? (The same problem also
8491 arises further down in this function.) */
8492 /* The type's name is already allocated along with
8493 this objfile, so we don't need to duplicate it
8495 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8500 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8501 really ever be static objects: otherwise, if you try
8502 to, say, break of a class's method and you're in a file
8503 which doesn't mention that class, it won't work unless
8504 the check for all static symbols in lookup_symbol_aux
8505 saves you. See the OtherFileClass tests in
8506 gdb.c++/namespace.exp. */
8508 struct pending
**list_to_add
;
8510 list_to_add
= (cu
->list_in_scope
== &file_symbols
8511 && (cu
->language
== language_cplus
8512 || cu
->language
== language_java
)
8513 ? &global_symbols
: cu
->list_in_scope
);
8515 add_symbol_to_list (sym
, list_to_add
);
8517 /* The semantics of C++ state that "struct foo { ... }" also
8518 defines a typedef for "foo". A Java class declaration also
8519 defines a typedef for the class. */
8520 if (cu
->language
== language_cplus
8521 || cu
->language
== language_java
8522 || cu
->language
== language_ada
)
8524 /* The symbol's name is already allocated along with
8525 this objfile, so we don't need to duplicate it for
8527 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8528 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8532 case DW_TAG_typedef
:
8533 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8534 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8535 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8536 add_symbol_to_list (sym
, cu
->list_in_scope
);
8538 case DW_TAG_base_type
:
8539 case DW_TAG_subrange_type
:
8540 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8541 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8542 add_symbol_to_list (sym
, cu
->list_in_scope
);
8544 case DW_TAG_enumerator
:
8545 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8546 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8549 dwarf2_const_value (attr
, sym
, cu
);
8552 /* NOTE: carlton/2003-11-10: See comment above in the
8553 DW_TAG_class_type, etc. block. */
8555 struct pending
**list_to_add
;
8557 list_to_add
= (cu
->list_in_scope
== &file_symbols
8558 && (cu
->language
== language_cplus
8559 || cu
->language
== language_java
)
8560 ? &global_symbols
: cu
->list_in_scope
);
8562 add_symbol_to_list (sym
, list_to_add
);
8565 case DW_TAG_namespace
:
8566 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8567 add_symbol_to_list (sym
, &global_symbols
);
8570 /* Not a tag we recognize. Hopefully we aren't processing
8571 trash data, but since we must specifically ignore things
8572 we don't recognize, there is nothing else we should do at
8574 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8575 dwarf_tag_name (die
->tag
));
8579 /* For the benefit of old versions of GCC, check for anonymous
8580 namespaces based on the demangled name. */
8581 if (!processing_has_namespace_info
8582 && cu
->language
== language_cplus
8583 && dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
) != NULL
)
8584 cp_scan_for_anonymous_namespaces (sym
);
8589 /* Copy constant value from an attribute to a symbol. */
8592 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8593 struct dwarf2_cu
*cu
)
8595 struct objfile
*objfile
= cu
->objfile
;
8596 struct comp_unit_head
*cu_header
= &cu
->header
;
8597 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8598 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8599 struct dwarf_block
*blk
;
8604 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8605 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8606 cu_header
->addr_size
,
8607 TYPE_LENGTH (SYMBOL_TYPE
8609 SYMBOL_VALUE_BYTES (sym
) =
8610 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8611 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8612 it's body - store_unsigned_integer. */
8613 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8614 byte_order
, DW_ADDR (attr
));
8615 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8617 case DW_FORM_string
:
8619 /* DW_STRING is already allocated on the obstack, point directly
8621 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8622 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8624 case DW_FORM_block1
:
8625 case DW_FORM_block2
:
8626 case DW_FORM_block4
:
8628 blk
= DW_BLOCK (attr
);
8629 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8630 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8632 TYPE_LENGTH (SYMBOL_TYPE
8634 SYMBOL_VALUE_BYTES (sym
) =
8635 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8636 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8637 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8640 /* The DW_AT_const_value attributes are supposed to carry the
8641 symbol's value "represented as it would be on the target
8642 architecture." By the time we get here, it's already been
8643 converted to host endianness, so we just need to sign- or
8644 zero-extend it as appropriate. */
8646 dwarf2_const_value_data (attr
, sym
, 8);
8649 dwarf2_const_value_data (attr
, sym
, 16);
8652 dwarf2_const_value_data (attr
, sym
, 32);
8655 dwarf2_const_value_data (attr
, sym
, 64);
8659 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8660 SYMBOL_CLASS (sym
) = LOC_CONST
;
8664 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8665 SYMBOL_CLASS (sym
) = LOC_CONST
;
8669 complaint (&symfile_complaints
,
8670 _("unsupported const value attribute form: '%s'"),
8671 dwarf_form_name (attr
->form
));
8672 SYMBOL_VALUE (sym
) = 0;
8673 SYMBOL_CLASS (sym
) = LOC_CONST
;
8679 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8680 or zero-extend it as appropriate for the symbol's type. */
8682 dwarf2_const_value_data (struct attribute
*attr
,
8686 LONGEST l
= DW_UNSND (attr
);
8688 if (bits
< sizeof (l
) * 8)
8690 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8691 l
&= ((LONGEST
) 1 << bits
) - 1;
8693 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8696 SYMBOL_VALUE (sym
) = l
;
8697 SYMBOL_CLASS (sym
) = LOC_CONST
;
8701 /* Return the type of the die in question using its DW_AT_type attribute. */
8703 static struct type
*
8704 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8707 struct attribute
*type_attr
;
8708 struct die_info
*type_die
;
8710 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8713 /* A missing DW_AT_type represents a void type. */
8714 return objfile_type (cu
->objfile
)->builtin_void
;
8717 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8719 type
= tag_type_to_type (type_die
, cu
);
8722 dump_die_for_error (type_die
);
8723 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8729 /* Return the containing type of the die in question using its
8730 DW_AT_containing_type attribute. */
8732 static struct type
*
8733 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8735 struct type
*type
= NULL
;
8736 struct attribute
*type_attr
;
8737 struct die_info
*type_die
= NULL
;
8739 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8742 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8743 type
= tag_type_to_type (type_die
, cu
);
8748 dump_die_for_error (type_die
);
8749 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8755 static struct type
*
8756 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8758 struct type
*this_type
;
8760 this_type
= read_type_die (die
, cu
);
8763 dump_die_for_error (die
);
8764 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8770 static struct type
*
8771 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8773 struct type
*this_type
;
8775 this_type
= get_die_type (die
, cu
);
8781 case DW_TAG_class_type
:
8782 case DW_TAG_interface_type
:
8783 case DW_TAG_structure_type
:
8784 case DW_TAG_union_type
:
8785 this_type
= read_structure_type (die
, cu
);
8787 case DW_TAG_enumeration_type
:
8788 this_type
= read_enumeration_type (die
, cu
);
8790 case DW_TAG_subprogram
:
8791 case DW_TAG_subroutine_type
:
8792 case DW_TAG_inlined_subroutine
:
8793 this_type
= read_subroutine_type (die
, cu
);
8795 case DW_TAG_array_type
:
8796 this_type
= read_array_type (die
, cu
);
8798 case DW_TAG_set_type
:
8799 this_type
= read_set_type (die
, cu
);
8801 case DW_TAG_pointer_type
:
8802 this_type
= read_tag_pointer_type (die
, cu
);
8804 case DW_TAG_ptr_to_member_type
:
8805 this_type
= read_tag_ptr_to_member_type (die
, cu
);
8807 case DW_TAG_reference_type
:
8808 this_type
= read_tag_reference_type (die
, cu
);
8810 case DW_TAG_const_type
:
8811 this_type
= read_tag_const_type (die
, cu
);
8813 case DW_TAG_volatile_type
:
8814 this_type
= read_tag_volatile_type (die
, cu
);
8816 case DW_TAG_string_type
:
8817 this_type
= read_tag_string_type (die
, cu
);
8819 case DW_TAG_typedef
:
8820 this_type
= read_typedef (die
, cu
);
8822 case DW_TAG_subrange_type
:
8823 this_type
= read_subrange_type (die
, cu
);
8825 case DW_TAG_base_type
:
8826 this_type
= read_base_type (die
, cu
);
8828 case DW_TAG_unspecified_type
:
8829 this_type
= read_unspecified_type (die
, cu
);
8831 case DW_TAG_namespace
:
8832 this_type
= read_namespace_type (die
, cu
);
8835 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
8836 dwarf_tag_name (die
->tag
));
8843 /* Return the name of the namespace/class that DIE is defined within,
8844 or "" if we can't tell. The caller should not xfree the result.
8846 For example, if we're within the method foo() in the following
8856 then determine_prefix on foo's die will return "N::C". */
8859 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
8861 struct die_info
*parent
, *spec_die
;
8862 struct dwarf2_cu
*spec_cu
;
8863 struct type
*parent_type
;
8865 if (cu
->language
!= language_cplus
8866 && cu
->language
!= language_java
)
8869 /* We have to be careful in the presence of DW_AT_specification.
8870 For example, with GCC 3.4, given the code
8874 // Definition of N::foo.
8878 then we'll have a tree of DIEs like this:
8880 1: DW_TAG_compile_unit
8881 2: DW_TAG_namespace // N
8882 3: DW_TAG_subprogram // declaration of N::foo
8883 4: DW_TAG_subprogram // definition of N::foo
8884 DW_AT_specification // refers to die #3
8886 Thus, when processing die #4, we have to pretend that we're in
8887 the context of its DW_AT_specification, namely the contex of die
8890 spec_die
= die_specification (die
, &spec_cu
);
8891 if (spec_die
== NULL
)
8892 parent
= die
->parent
;
8895 parent
= spec_die
->parent
;
8902 switch (parent
->tag
)
8904 case DW_TAG_namespace
:
8905 parent_type
= read_type_die (parent
, cu
);
8906 /* We give a name to even anonymous namespaces. */
8907 return TYPE_TAG_NAME (parent_type
);
8908 case DW_TAG_class_type
:
8909 case DW_TAG_interface_type
:
8910 case DW_TAG_structure_type
:
8911 case DW_TAG_union_type
:
8912 parent_type
= read_type_die (parent
, cu
);
8913 if (TYPE_TAG_NAME (parent_type
) != NULL
)
8914 return TYPE_TAG_NAME (parent_type
);
8916 /* An anonymous structure is only allowed non-static data
8917 members; no typedefs, no member functions, et cetera.
8918 So it does not need a prefix. */
8921 return determine_prefix (parent
, cu
);
8925 /* Return a newly-allocated string formed by concatenating PREFIX and
8926 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8927 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8928 perform an obconcat, otherwise allocate storage for the result. The CU argument
8929 is used to determine the language and hence, the appropriate separator. */
8931 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8934 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
8935 struct dwarf2_cu
*cu
)
8939 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
8941 else if (cu
->language
== language_java
)
8953 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
8954 strcpy (retval
, prefix
);
8955 strcat (retval
, sep
);
8956 strcat (retval
, suffix
);
8961 /* We have an obstack. */
8962 return obconcat (obs
, prefix
, sep
, suffix
);
8966 /* Return sibling of die, NULL if no sibling. */
8968 static struct die_info
*
8969 sibling_die (struct die_info
*die
)
8971 return die
->sibling
;
8974 /* Get linkage name of a die, return NULL if not found. */
8977 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8979 struct attribute
*attr
;
8981 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8982 if (attr
&& DW_STRING (attr
))
8983 return DW_STRING (attr
);
8984 return dwarf2_name (die
, cu
);
8987 /* Get name of a die, return NULL if not found. */
8990 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
8991 struct obstack
*obstack
)
8993 if (name
&& cu
->language
== language_cplus
)
8995 char *canon_name
= cp_canonicalize_string (name
);
8997 if (canon_name
!= NULL
)
8999 if (strcmp (canon_name
, name
) != 0)
9000 name
= obsavestring (canon_name
, strlen (canon_name
),
9009 /* Get name of a die, return NULL if not found. */
9012 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9014 struct attribute
*attr
;
9016 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9017 if (!attr
|| !DW_STRING (attr
))
9022 case DW_TAG_compile_unit
:
9023 /* Compilation units have a DW_AT_name that is a filename, not
9024 a source language identifier. */
9025 case DW_TAG_enumeration_type
:
9026 case DW_TAG_enumerator
:
9027 /* These tags always have simple identifiers already; no need
9028 to canonicalize them. */
9029 return DW_STRING (attr
);
9031 if (!DW_STRING_IS_CANONICAL (attr
))
9034 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9035 &cu
->objfile
->objfile_obstack
);
9036 DW_STRING_IS_CANONICAL (attr
) = 1;
9038 return DW_STRING (attr
);
9042 /* Return the die that this die in an extension of, or NULL if there
9043 is none. *EXT_CU is the CU containing DIE on input, and the CU
9044 containing the return value on output. */
9046 static struct die_info
*
9047 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9049 struct attribute
*attr
;
9051 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9055 return follow_die_ref (die
, attr
, ext_cu
);
9058 /* Convert a DIE tag into its string name. */
9061 dwarf_tag_name (unsigned tag
)
9065 case DW_TAG_padding
:
9066 return "DW_TAG_padding";
9067 case DW_TAG_array_type
:
9068 return "DW_TAG_array_type";
9069 case DW_TAG_class_type
:
9070 return "DW_TAG_class_type";
9071 case DW_TAG_entry_point
:
9072 return "DW_TAG_entry_point";
9073 case DW_TAG_enumeration_type
:
9074 return "DW_TAG_enumeration_type";
9075 case DW_TAG_formal_parameter
:
9076 return "DW_TAG_formal_parameter";
9077 case DW_TAG_imported_declaration
:
9078 return "DW_TAG_imported_declaration";
9080 return "DW_TAG_label";
9081 case DW_TAG_lexical_block
:
9082 return "DW_TAG_lexical_block";
9084 return "DW_TAG_member";
9085 case DW_TAG_pointer_type
:
9086 return "DW_TAG_pointer_type";
9087 case DW_TAG_reference_type
:
9088 return "DW_TAG_reference_type";
9089 case DW_TAG_compile_unit
:
9090 return "DW_TAG_compile_unit";
9091 case DW_TAG_string_type
:
9092 return "DW_TAG_string_type";
9093 case DW_TAG_structure_type
:
9094 return "DW_TAG_structure_type";
9095 case DW_TAG_subroutine_type
:
9096 return "DW_TAG_subroutine_type";
9097 case DW_TAG_typedef
:
9098 return "DW_TAG_typedef";
9099 case DW_TAG_union_type
:
9100 return "DW_TAG_union_type";
9101 case DW_TAG_unspecified_parameters
:
9102 return "DW_TAG_unspecified_parameters";
9103 case DW_TAG_variant
:
9104 return "DW_TAG_variant";
9105 case DW_TAG_common_block
:
9106 return "DW_TAG_common_block";
9107 case DW_TAG_common_inclusion
:
9108 return "DW_TAG_common_inclusion";
9109 case DW_TAG_inheritance
:
9110 return "DW_TAG_inheritance";
9111 case DW_TAG_inlined_subroutine
:
9112 return "DW_TAG_inlined_subroutine";
9114 return "DW_TAG_module";
9115 case DW_TAG_ptr_to_member_type
:
9116 return "DW_TAG_ptr_to_member_type";
9117 case DW_TAG_set_type
:
9118 return "DW_TAG_set_type";
9119 case DW_TAG_subrange_type
:
9120 return "DW_TAG_subrange_type";
9121 case DW_TAG_with_stmt
:
9122 return "DW_TAG_with_stmt";
9123 case DW_TAG_access_declaration
:
9124 return "DW_TAG_access_declaration";
9125 case DW_TAG_base_type
:
9126 return "DW_TAG_base_type";
9127 case DW_TAG_catch_block
:
9128 return "DW_TAG_catch_block";
9129 case DW_TAG_const_type
:
9130 return "DW_TAG_const_type";
9131 case DW_TAG_constant
:
9132 return "DW_TAG_constant";
9133 case DW_TAG_enumerator
:
9134 return "DW_TAG_enumerator";
9135 case DW_TAG_file_type
:
9136 return "DW_TAG_file_type";
9138 return "DW_TAG_friend";
9139 case DW_TAG_namelist
:
9140 return "DW_TAG_namelist";
9141 case DW_TAG_namelist_item
:
9142 return "DW_TAG_namelist_item";
9143 case DW_TAG_packed_type
:
9144 return "DW_TAG_packed_type";
9145 case DW_TAG_subprogram
:
9146 return "DW_TAG_subprogram";
9147 case DW_TAG_template_type_param
:
9148 return "DW_TAG_template_type_param";
9149 case DW_TAG_template_value_param
:
9150 return "DW_TAG_template_value_param";
9151 case DW_TAG_thrown_type
:
9152 return "DW_TAG_thrown_type";
9153 case DW_TAG_try_block
:
9154 return "DW_TAG_try_block";
9155 case DW_TAG_variant_part
:
9156 return "DW_TAG_variant_part";
9157 case DW_TAG_variable
:
9158 return "DW_TAG_variable";
9159 case DW_TAG_volatile_type
:
9160 return "DW_TAG_volatile_type";
9161 case DW_TAG_dwarf_procedure
:
9162 return "DW_TAG_dwarf_procedure";
9163 case DW_TAG_restrict_type
:
9164 return "DW_TAG_restrict_type";
9165 case DW_TAG_interface_type
:
9166 return "DW_TAG_interface_type";
9167 case DW_TAG_namespace
:
9168 return "DW_TAG_namespace";
9169 case DW_TAG_imported_module
:
9170 return "DW_TAG_imported_module";
9171 case DW_TAG_unspecified_type
:
9172 return "DW_TAG_unspecified_type";
9173 case DW_TAG_partial_unit
:
9174 return "DW_TAG_partial_unit";
9175 case DW_TAG_imported_unit
:
9176 return "DW_TAG_imported_unit";
9177 case DW_TAG_condition
:
9178 return "DW_TAG_condition";
9179 case DW_TAG_shared_type
:
9180 return "DW_TAG_shared_type";
9181 case DW_TAG_type_unit
:
9182 return "DW_TAG_type_unit";
9183 case DW_TAG_MIPS_loop
:
9184 return "DW_TAG_MIPS_loop";
9185 case DW_TAG_HP_array_descriptor
:
9186 return "DW_TAG_HP_array_descriptor";
9187 case DW_TAG_format_label
:
9188 return "DW_TAG_format_label";
9189 case DW_TAG_function_template
:
9190 return "DW_TAG_function_template";
9191 case DW_TAG_class_template
:
9192 return "DW_TAG_class_template";
9193 case DW_TAG_GNU_BINCL
:
9194 return "DW_TAG_GNU_BINCL";
9195 case DW_TAG_GNU_EINCL
:
9196 return "DW_TAG_GNU_EINCL";
9197 case DW_TAG_upc_shared_type
:
9198 return "DW_TAG_upc_shared_type";
9199 case DW_TAG_upc_strict_type
:
9200 return "DW_TAG_upc_strict_type";
9201 case DW_TAG_upc_relaxed_type
:
9202 return "DW_TAG_upc_relaxed_type";
9203 case DW_TAG_PGI_kanji_type
:
9204 return "DW_TAG_PGI_kanji_type";
9205 case DW_TAG_PGI_interface_block
:
9206 return "DW_TAG_PGI_interface_block";
9208 return "DW_TAG_<unknown>";
9212 /* Convert a DWARF attribute code into its string name. */
9215 dwarf_attr_name (unsigned attr
)
9220 return "DW_AT_sibling";
9221 case DW_AT_location
:
9222 return "DW_AT_location";
9224 return "DW_AT_name";
9225 case DW_AT_ordering
:
9226 return "DW_AT_ordering";
9227 case DW_AT_subscr_data
:
9228 return "DW_AT_subscr_data";
9229 case DW_AT_byte_size
:
9230 return "DW_AT_byte_size";
9231 case DW_AT_bit_offset
:
9232 return "DW_AT_bit_offset";
9233 case DW_AT_bit_size
:
9234 return "DW_AT_bit_size";
9235 case DW_AT_element_list
:
9236 return "DW_AT_element_list";
9237 case DW_AT_stmt_list
:
9238 return "DW_AT_stmt_list";
9240 return "DW_AT_low_pc";
9242 return "DW_AT_high_pc";
9243 case DW_AT_language
:
9244 return "DW_AT_language";
9246 return "DW_AT_member";
9248 return "DW_AT_discr";
9249 case DW_AT_discr_value
:
9250 return "DW_AT_discr_value";
9251 case DW_AT_visibility
:
9252 return "DW_AT_visibility";
9254 return "DW_AT_import";
9255 case DW_AT_string_length
:
9256 return "DW_AT_string_length";
9257 case DW_AT_common_reference
:
9258 return "DW_AT_common_reference";
9259 case DW_AT_comp_dir
:
9260 return "DW_AT_comp_dir";
9261 case DW_AT_const_value
:
9262 return "DW_AT_const_value";
9263 case DW_AT_containing_type
:
9264 return "DW_AT_containing_type";
9265 case DW_AT_default_value
:
9266 return "DW_AT_default_value";
9268 return "DW_AT_inline";
9269 case DW_AT_is_optional
:
9270 return "DW_AT_is_optional";
9271 case DW_AT_lower_bound
:
9272 return "DW_AT_lower_bound";
9273 case DW_AT_producer
:
9274 return "DW_AT_producer";
9275 case DW_AT_prototyped
:
9276 return "DW_AT_prototyped";
9277 case DW_AT_return_addr
:
9278 return "DW_AT_return_addr";
9279 case DW_AT_start_scope
:
9280 return "DW_AT_start_scope";
9281 case DW_AT_bit_stride
:
9282 return "DW_AT_bit_stride";
9283 case DW_AT_upper_bound
:
9284 return "DW_AT_upper_bound";
9285 case DW_AT_abstract_origin
:
9286 return "DW_AT_abstract_origin";
9287 case DW_AT_accessibility
:
9288 return "DW_AT_accessibility";
9289 case DW_AT_address_class
:
9290 return "DW_AT_address_class";
9291 case DW_AT_artificial
:
9292 return "DW_AT_artificial";
9293 case DW_AT_base_types
:
9294 return "DW_AT_base_types";
9295 case DW_AT_calling_convention
:
9296 return "DW_AT_calling_convention";
9298 return "DW_AT_count";
9299 case DW_AT_data_member_location
:
9300 return "DW_AT_data_member_location";
9301 case DW_AT_decl_column
:
9302 return "DW_AT_decl_column";
9303 case DW_AT_decl_file
:
9304 return "DW_AT_decl_file";
9305 case DW_AT_decl_line
:
9306 return "DW_AT_decl_line";
9307 case DW_AT_declaration
:
9308 return "DW_AT_declaration";
9309 case DW_AT_discr_list
:
9310 return "DW_AT_discr_list";
9311 case DW_AT_encoding
:
9312 return "DW_AT_encoding";
9313 case DW_AT_external
:
9314 return "DW_AT_external";
9315 case DW_AT_frame_base
:
9316 return "DW_AT_frame_base";
9318 return "DW_AT_friend";
9319 case DW_AT_identifier_case
:
9320 return "DW_AT_identifier_case";
9321 case DW_AT_macro_info
:
9322 return "DW_AT_macro_info";
9323 case DW_AT_namelist_items
:
9324 return "DW_AT_namelist_items";
9325 case DW_AT_priority
:
9326 return "DW_AT_priority";
9328 return "DW_AT_segment";
9329 case DW_AT_specification
:
9330 return "DW_AT_specification";
9331 case DW_AT_static_link
:
9332 return "DW_AT_static_link";
9334 return "DW_AT_type";
9335 case DW_AT_use_location
:
9336 return "DW_AT_use_location";
9337 case DW_AT_variable_parameter
:
9338 return "DW_AT_variable_parameter";
9339 case DW_AT_virtuality
:
9340 return "DW_AT_virtuality";
9341 case DW_AT_vtable_elem_location
:
9342 return "DW_AT_vtable_elem_location";
9343 /* DWARF 3 values. */
9344 case DW_AT_allocated
:
9345 return "DW_AT_allocated";
9346 case DW_AT_associated
:
9347 return "DW_AT_associated";
9348 case DW_AT_data_location
:
9349 return "DW_AT_data_location";
9350 case DW_AT_byte_stride
:
9351 return "DW_AT_byte_stride";
9352 case DW_AT_entry_pc
:
9353 return "DW_AT_entry_pc";
9354 case DW_AT_use_UTF8
:
9355 return "DW_AT_use_UTF8";
9356 case DW_AT_extension
:
9357 return "DW_AT_extension";
9359 return "DW_AT_ranges";
9360 case DW_AT_trampoline
:
9361 return "DW_AT_trampoline";
9362 case DW_AT_call_column
:
9363 return "DW_AT_call_column";
9364 case DW_AT_call_file
:
9365 return "DW_AT_call_file";
9366 case DW_AT_call_line
:
9367 return "DW_AT_call_line";
9368 case DW_AT_description
:
9369 return "DW_AT_description";
9370 case DW_AT_binary_scale
:
9371 return "DW_AT_binary_scale";
9372 case DW_AT_decimal_scale
:
9373 return "DW_AT_decimal_scale";
9375 return "DW_AT_small";
9376 case DW_AT_decimal_sign
:
9377 return "DW_AT_decimal_sign";
9378 case DW_AT_digit_count
:
9379 return "DW_AT_digit_count";
9380 case DW_AT_picture_string
:
9381 return "DW_AT_picture_string";
9383 return "DW_AT_mutable";
9384 case DW_AT_threads_scaled
:
9385 return "DW_AT_threads_scaled";
9386 case DW_AT_explicit
:
9387 return "DW_AT_explicit";
9388 case DW_AT_object_pointer
:
9389 return "DW_AT_object_pointer";
9390 case DW_AT_endianity
:
9391 return "DW_AT_endianity";
9392 case DW_AT_elemental
:
9393 return "DW_AT_elemental";
9395 return "DW_AT_pure";
9396 case DW_AT_recursive
:
9397 return "DW_AT_recursive";
9398 /* DWARF 4 values. */
9399 case DW_AT_signature
:
9400 return "DW_AT_signature";
9401 /* SGI/MIPS extensions. */
9402 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9403 case DW_AT_MIPS_fde
:
9404 return "DW_AT_MIPS_fde";
9406 case DW_AT_MIPS_loop_begin
:
9407 return "DW_AT_MIPS_loop_begin";
9408 case DW_AT_MIPS_tail_loop_begin
:
9409 return "DW_AT_MIPS_tail_loop_begin";
9410 case DW_AT_MIPS_epilog_begin
:
9411 return "DW_AT_MIPS_epilog_begin";
9412 case DW_AT_MIPS_loop_unroll_factor
:
9413 return "DW_AT_MIPS_loop_unroll_factor";
9414 case DW_AT_MIPS_software_pipeline_depth
:
9415 return "DW_AT_MIPS_software_pipeline_depth";
9416 case DW_AT_MIPS_linkage_name
:
9417 return "DW_AT_MIPS_linkage_name";
9418 case DW_AT_MIPS_stride
:
9419 return "DW_AT_MIPS_stride";
9420 case DW_AT_MIPS_abstract_name
:
9421 return "DW_AT_MIPS_abstract_name";
9422 case DW_AT_MIPS_clone_origin
:
9423 return "DW_AT_MIPS_clone_origin";
9424 case DW_AT_MIPS_has_inlines
:
9425 return "DW_AT_MIPS_has_inlines";
9426 /* HP extensions. */
9427 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9428 case DW_AT_HP_block_index
:
9429 return "DW_AT_HP_block_index";
9431 case DW_AT_HP_unmodifiable
:
9432 return "DW_AT_HP_unmodifiable";
9433 case DW_AT_HP_actuals_stmt_list
:
9434 return "DW_AT_HP_actuals_stmt_list";
9435 case DW_AT_HP_proc_per_section
:
9436 return "DW_AT_HP_proc_per_section";
9437 case DW_AT_HP_raw_data_ptr
:
9438 return "DW_AT_HP_raw_data_ptr";
9439 case DW_AT_HP_pass_by_reference
:
9440 return "DW_AT_HP_pass_by_reference";
9441 case DW_AT_HP_opt_level
:
9442 return "DW_AT_HP_opt_level";
9443 case DW_AT_HP_prof_version_id
:
9444 return "DW_AT_HP_prof_version_id";
9445 case DW_AT_HP_opt_flags
:
9446 return "DW_AT_HP_opt_flags";
9447 case DW_AT_HP_cold_region_low_pc
:
9448 return "DW_AT_HP_cold_region_low_pc";
9449 case DW_AT_HP_cold_region_high_pc
:
9450 return "DW_AT_HP_cold_region_high_pc";
9451 case DW_AT_HP_all_variables_modifiable
:
9452 return "DW_AT_HP_all_variables_modifiable";
9453 case DW_AT_HP_linkage_name
:
9454 return "DW_AT_HP_linkage_name";
9455 case DW_AT_HP_prof_flags
:
9456 return "DW_AT_HP_prof_flags";
9457 /* GNU extensions. */
9458 case DW_AT_sf_names
:
9459 return "DW_AT_sf_names";
9460 case DW_AT_src_info
:
9461 return "DW_AT_src_info";
9462 case DW_AT_mac_info
:
9463 return "DW_AT_mac_info";
9464 case DW_AT_src_coords
:
9465 return "DW_AT_src_coords";
9466 case DW_AT_body_begin
:
9467 return "DW_AT_body_begin";
9468 case DW_AT_body_end
:
9469 return "DW_AT_body_end";
9470 case DW_AT_GNU_vector
:
9471 return "DW_AT_GNU_vector";
9472 /* VMS extensions. */
9473 case DW_AT_VMS_rtnbeg_pd_address
:
9474 return "DW_AT_VMS_rtnbeg_pd_address";
9475 /* UPC extension. */
9476 case DW_AT_upc_threads_scaled
:
9477 return "DW_AT_upc_threads_scaled";
9478 /* PGI (STMicroelectronics) extensions. */
9479 case DW_AT_PGI_lbase
:
9480 return "DW_AT_PGI_lbase";
9481 case DW_AT_PGI_soffset
:
9482 return "DW_AT_PGI_soffset";
9483 case DW_AT_PGI_lstride
:
9484 return "DW_AT_PGI_lstride";
9486 return "DW_AT_<unknown>";
9490 /* Convert a DWARF value form code into its string name. */
9493 dwarf_form_name (unsigned form
)
9498 return "DW_FORM_addr";
9499 case DW_FORM_block2
:
9500 return "DW_FORM_block2";
9501 case DW_FORM_block4
:
9502 return "DW_FORM_block4";
9504 return "DW_FORM_data2";
9506 return "DW_FORM_data4";
9508 return "DW_FORM_data8";
9509 case DW_FORM_string
:
9510 return "DW_FORM_string";
9512 return "DW_FORM_block";
9513 case DW_FORM_block1
:
9514 return "DW_FORM_block1";
9516 return "DW_FORM_data1";
9518 return "DW_FORM_flag";
9520 return "DW_FORM_sdata";
9522 return "DW_FORM_strp";
9524 return "DW_FORM_udata";
9525 case DW_FORM_ref_addr
:
9526 return "DW_FORM_ref_addr";
9528 return "DW_FORM_ref1";
9530 return "DW_FORM_ref2";
9532 return "DW_FORM_ref4";
9534 return "DW_FORM_ref8";
9535 case DW_FORM_ref_udata
:
9536 return "DW_FORM_ref_udata";
9537 case DW_FORM_indirect
:
9538 return "DW_FORM_indirect";
9539 case DW_FORM_sec_offset
:
9540 return "DW_FORM_sec_offset";
9541 case DW_FORM_exprloc
:
9542 return "DW_FORM_exprloc";
9543 case DW_FORM_flag_present
:
9544 return "DW_FORM_flag_present";
9546 return "DW_FORM_sig8";
9548 return "DW_FORM_<unknown>";
9552 /* Convert a DWARF stack opcode into its string name. */
9555 dwarf_stack_op_name (unsigned op
)
9560 return "DW_OP_addr";
9562 return "DW_OP_deref";
9564 return "DW_OP_const1u";
9566 return "DW_OP_const1s";
9568 return "DW_OP_const2u";
9570 return "DW_OP_const2s";
9572 return "DW_OP_const4u";
9574 return "DW_OP_const4s";
9576 return "DW_OP_const8u";
9578 return "DW_OP_const8s";
9580 return "DW_OP_constu";
9582 return "DW_OP_consts";
9586 return "DW_OP_drop";
9588 return "DW_OP_over";
9590 return "DW_OP_pick";
9592 return "DW_OP_swap";
9596 return "DW_OP_xderef";
9604 return "DW_OP_minus";
9616 return "DW_OP_plus";
9617 case DW_OP_plus_uconst
:
9618 return "DW_OP_plus_uconst";
9624 return "DW_OP_shra";
9642 return "DW_OP_skip";
9644 return "DW_OP_lit0";
9646 return "DW_OP_lit1";
9648 return "DW_OP_lit2";
9650 return "DW_OP_lit3";
9652 return "DW_OP_lit4";
9654 return "DW_OP_lit5";
9656 return "DW_OP_lit6";
9658 return "DW_OP_lit7";
9660 return "DW_OP_lit8";
9662 return "DW_OP_lit9";
9664 return "DW_OP_lit10";
9666 return "DW_OP_lit11";
9668 return "DW_OP_lit12";
9670 return "DW_OP_lit13";
9672 return "DW_OP_lit14";
9674 return "DW_OP_lit15";
9676 return "DW_OP_lit16";
9678 return "DW_OP_lit17";
9680 return "DW_OP_lit18";
9682 return "DW_OP_lit19";
9684 return "DW_OP_lit20";
9686 return "DW_OP_lit21";
9688 return "DW_OP_lit22";
9690 return "DW_OP_lit23";
9692 return "DW_OP_lit24";
9694 return "DW_OP_lit25";
9696 return "DW_OP_lit26";
9698 return "DW_OP_lit27";
9700 return "DW_OP_lit28";
9702 return "DW_OP_lit29";
9704 return "DW_OP_lit30";
9706 return "DW_OP_lit31";
9708 return "DW_OP_reg0";
9710 return "DW_OP_reg1";
9712 return "DW_OP_reg2";
9714 return "DW_OP_reg3";
9716 return "DW_OP_reg4";
9718 return "DW_OP_reg5";
9720 return "DW_OP_reg6";
9722 return "DW_OP_reg7";
9724 return "DW_OP_reg8";
9726 return "DW_OP_reg9";
9728 return "DW_OP_reg10";
9730 return "DW_OP_reg11";
9732 return "DW_OP_reg12";
9734 return "DW_OP_reg13";
9736 return "DW_OP_reg14";
9738 return "DW_OP_reg15";
9740 return "DW_OP_reg16";
9742 return "DW_OP_reg17";
9744 return "DW_OP_reg18";
9746 return "DW_OP_reg19";
9748 return "DW_OP_reg20";
9750 return "DW_OP_reg21";
9752 return "DW_OP_reg22";
9754 return "DW_OP_reg23";
9756 return "DW_OP_reg24";
9758 return "DW_OP_reg25";
9760 return "DW_OP_reg26";
9762 return "DW_OP_reg27";
9764 return "DW_OP_reg28";
9766 return "DW_OP_reg29";
9768 return "DW_OP_reg30";
9770 return "DW_OP_reg31";
9772 return "DW_OP_breg0";
9774 return "DW_OP_breg1";
9776 return "DW_OP_breg2";
9778 return "DW_OP_breg3";
9780 return "DW_OP_breg4";
9782 return "DW_OP_breg5";
9784 return "DW_OP_breg6";
9786 return "DW_OP_breg7";
9788 return "DW_OP_breg8";
9790 return "DW_OP_breg9";
9792 return "DW_OP_breg10";
9794 return "DW_OP_breg11";
9796 return "DW_OP_breg12";
9798 return "DW_OP_breg13";
9800 return "DW_OP_breg14";
9802 return "DW_OP_breg15";
9804 return "DW_OP_breg16";
9806 return "DW_OP_breg17";
9808 return "DW_OP_breg18";
9810 return "DW_OP_breg19";
9812 return "DW_OP_breg20";
9814 return "DW_OP_breg21";
9816 return "DW_OP_breg22";
9818 return "DW_OP_breg23";
9820 return "DW_OP_breg24";
9822 return "DW_OP_breg25";
9824 return "DW_OP_breg26";
9826 return "DW_OP_breg27";
9828 return "DW_OP_breg28";
9830 return "DW_OP_breg29";
9832 return "DW_OP_breg30";
9834 return "DW_OP_breg31";
9836 return "DW_OP_regx";
9838 return "DW_OP_fbreg";
9840 return "DW_OP_bregx";
9842 return "DW_OP_piece";
9843 case DW_OP_deref_size
:
9844 return "DW_OP_deref_size";
9845 case DW_OP_xderef_size
:
9846 return "DW_OP_xderef_size";
9849 /* DWARF 3 extensions. */
9850 case DW_OP_push_object_address
:
9851 return "DW_OP_push_object_address";
9853 return "DW_OP_call2";
9855 return "DW_OP_call4";
9856 case DW_OP_call_ref
:
9857 return "DW_OP_call_ref";
9858 /* GNU extensions. */
9859 case DW_OP_form_tls_address
:
9860 return "DW_OP_form_tls_address";
9861 case DW_OP_call_frame_cfa
:
9862 return "DW_OP_call_frame_cfa";
9863 case DW_OP_bit_piece
:
9864 return "DW_OP_bit_piece";
9865 case DW_OP_GNU_push_tls_address
:
9866 return "DW_OP_GNU_push_tls_address";
9867 case DW_OP_GNU_uninit
:
9868 return "DW_OP_GNU_uninit";
9869 /* HP extensions. */
9870 case DW_OP_HP_is_value
:
9871 return "DW_OP_HP_is_value";
9872 case DW_OP_HP_fltconst4
:
9873 return "DW_OP_HP_fltconst4";
9874 case DW_OP_HP_fltconst8
:
9875 return "DW_OP_HP_fltconst8";
9876 case DW_OP_HP_mod_range
:
9877 return "DW_OP_HP_mod_range";
9878 case DW_OP_HP_unmod_range
:
9879 return "DW_OP_HP_unmod_range";
9881 return "DW_OP_HP_tls";
9883 return "OP_<unknown>";
9888 dwarf_bool_name (unsigned mybool
)
9896 /* Convert a DWARF type code into its string name. */
9899 dwarf_type_encoding_name (unsigned enc
)
9904 return "DW_ATE_void";
9905 case DW_ATE_address
:
9906 return "DW_ATE_address";
9907 case DW_ATE_boolean
:
9908 return "DW_ATE_boolean";
9909 case DW_ATE_complex_float
:
9910 return "DW_ATE_complex_float";
9912 return "DW_ATE_float";
9914 return "DW_ATE_signed";
9915 case DW_ATE_signed_char
:
9916 return "DW_ATE_signed_char";
9917 case DW_ATE_unsigned
:
9918 return "DW_ATE_unsigned";
9919 case DW_ATE_unsigned_char
:
9920 return "DW_ATE_unsigned_char";
9922 case DW_ATE_imaginary_float
:
9923 return "DW_ATE_imaginary_float";
9924 case DW_ATE_packed_decimal
:
9925 return "DW_ATE_packed_decimal";
9926 case DW_ATE_numeric_string
:
9927 return "DW_ATE_numeric_string";
9929 return "DW_ATE_edited";
9930 case DW_ATE_signed_fixed
:
9931 return "DW_ATE_signed_fixed";
9932 case DW_ATE_unsigned_fixed
:
9933 return "DW_ATE_unsigned_fixed";
9934 case DW_ATE_decimal_float
:
9935 return "DW_ATE_decimal_float";
9936 /* HP extensions. */
9937 case DW_ATE_HP_float80
:
9938 return "DW_ATE_HP_float80";
9939 case DW_ATE_HP_complex_float80
:
9940 return "DW_ATE_HP_complex_float80";
9941 case DW_ATE_HP_float128
:
9942 return "DW_ATE_HP_float128";
9943 case DW_ATE_HP_complex_float128
:
9944 return "DW_ATE_HP_complex_float128";
9945 case DW_ATE_HP_floathpintel
:
9946 return "DW_ATE_HP_floathpintel";
9947 case DW_ATE_HP_imaginary_float80
:
9948 return "DW_ATE_HP_imaginary_float80";
9949 case DW_ATE_HP_imaginary_float128
:
9950 return "DW_ATE_HP_imaginary_float128";
9952 return "DW_ATE_<unknown>";
9956 /* Convert a DWARF call frame info operation to its string name. */
9960 dwarf_cfi_name (unsigned cfi_opc
)
9964 case DW_CFA_advance_loc
:
9965 return "DW_CFA_advance_loc";
9967 return "DW_CFA_offset";
9968 case DW_CFA_restore
:
9969 return "DW_CFA_restore";
9971 return "DW_CFA_nop";
9972 case DW_CFA_set_loc
:
9973 return "DW_CFA_set_loc";
9974 case DW_CFA_advance_loc1
:
9975 return "DW_CFA_advance_loc1";
9976 case DW_CFA_advance_loc2
:
9977 return "DW_CFA_advance_loc2";
9978 case DW_CFA_advance_loc4
:
9979 return "DW_CFA_advance_loc4";
9980 case DW_CFA_offset_extended
:
9981 return "DW_CFA_offset_extended";
9982 case DW_CFA_restore_extended
:
9983 return "DW_CFA_restore_extended";
9984 case DW_CFA_undefined
:
9985 return "DW_CFA_undefined";
9986 case DW_CFA_same_value
:
9987 return "DW_CFA_same_value";
9988 case DW_CFA_register
:
9989 return "DW_CFA_register";
9990 case DW_CFA_remember_state
:
9991 return "DW_CFA_remember_state";
9992 case DW_CFA_restore_state
:
9993 return "DW_CFA_restore_state";
9994 case DW_CFA_def_cfa
:
9995 return "DW_CFA_def_cfa";
9996 case DW_CFA_def_cfa_register
:
9997 return "DW_CFA_def_cfa_register";
9998 case DW_CFA_def_cfa_offset
:
9999 return "DW_CFA_def_cfa_offset";
10001 case DW_CFA_def_cfa_expression
:
10002 return "DW_CFA_def_cfa_expression";
10003 case DW_CFA_expression
:
10004 return "DW_CFA_expression";
10005 case DW_CFA_offset_extended_sf
:
10006 return "DW_CFA_offset_extended_sf";
10007 case DW_CFA_def_cfa_sf
:
10008 return "DW_CFA_def_cfa_sf";
10009 case DW_CFA_def_cfa_offset_sf
:
10010 return "DW_CFA_def_cfa_offset_sf";
10011 case DW_CFA_val_offset
:
10012 return "DW_CFA_val_offset";
10013 case DW_CFA_val_offset_sf
:
10014 return "DW_CFA_val_offset_sf";
10015 case DW_CFA_val_expression
:
10016 return "DW_CFA_val_expression";
10017 /* SGI/MIPS specific. */
10018 case DW_CFA_MIPS_advance_loc8
:
10019 return "DW_CFA_MIPS_advance_loc8";
10020 /* GNU extensions. */
10021 case DW_CFA_GNU_window_save
:
10022 return "DW_CFA_GNU_window_save";
10023 case DW_CFA_GNU_args_size
:
10024 return "DW_CFA_GNU_args_size";
10025 case DW_CFA_GNU_negative_offset_extended
:
10026 return "DW_CFA_GNU_negative_offset_extended";
10028 return "DW_CFA_<unknown>";
10034 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10038 print_spaces (indent
, f
);
10039 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10040 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10042 if (die
->parent
!= NULL
)
10044 print_spaces (indent
, f
);
10045 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10046 die
->parent
->offset
);
10049 print_spaces (indent
, f
);
10050 fprintf_unfiltered (f
, " has children: %s\n",
10051 dwarf_bool_name (die
->child
!= NULL
));
10053 print_spaces (indent
, f
);
10054 fprintf_unfiltered (f
, " attributes:\n");
10056 for (i
= 0; i
< die
->num_attrs
; ++i
)
10058 print_spaces (indent
, f
);
10059 fprintf_unfiltered (f
, " %s (%s) ",
10060 dwarf_attr_name (die
->attrs
[i
].name
),
10061 dwarf_form_name (die
->attrs
[i
].form
));
10063 switch (die
->attrs
[i
].form
)
10065 case DW_FORM_ref_addr
:
10067 fprintf_unfiltered (f
, "address: ");
10068 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10070 case DW_FORM_block2
:
10071 case DW_FORM_block4
:
10072 case DW_FORM_block
:
10073 case DW_FORM_block1
:
10074 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10079 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10080 (long) (DW_ADDR (&die
->attrs
[i
])));
10082 case DW_FORM_data1
:
10083 case DW_FORM_data2
:
10084 case DW_FORM_data4
:
10085 case DW_FORM_data8
:
10086 case DW_FORM_udata
:
10087 case DW_FORM_sdata
:
10088 fprintf_unfiltered (f
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
10091 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10092 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10093 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10095 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10097 case DW_FORM_string
:
10099 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10100 DW_STRING (&die
->attrs
[i
])
10101 ? DW_STRING (&die
->attrs
[i
]) : "",
10102 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10105 if (DW_UNSND (&die
->attrs
[i
]))
10106 fprintf_unfiltered (f
, "flag: TRUE");
10108 fprintf_unfiltered (f
, "flag: FALSE");
10110 case DW_FORM_indirect
:
10111 /* the reader will have reduced the indirect form to
10112 the "base form" so this form should not occur */
10113 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10116 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10117 die
->attrs
[i
].form
);
10120 fprintf_unfiltered (f
, "\n");
10125 dump_die_for_error (struct die_info
*die
)
10127 dump_die_shallow (gdb_stderr
, 0, die
);
10131 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10133 int indent
= level
* 4;
10135 gdb_assert (die
!= NULL
);
10137 if (level
>= max_level
)
10140 dump_die_shallow (f
, indent
, die
);
10142 if (die
->child
!= NULL
)
10144 print_spaces (indent
, f
);
10145 fprintf_unfiltered (f
, " Children:");
10146 if (level
+ 1 < max_level
)
10148 fprintf_unfiltered (f
, "\n");
10149 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10153 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10157 if (die
->sibling
!= NULL
&& level
> 0)
10159 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10163 /* This is called from the pdie macro in gdbinit.in.
10164 It's not static so gcc will keep a copy callable from gdb. */
10167 dump_die (struct die_info
*die
, int max_level
)
10169 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10173 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10177 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10183 is_ref_attr (struct attribute
*attr
)
10185 switch (attr
->form
)
10187 case DW_FORM_ref_addr
:
10192 case DW_FORM_ref_udata
:
10199 static unsigned int
10200 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10202 if (is_ref_attr (attr
))
10203 return DW_ADDR (attr
);
10205 complaint (&symfile_complaints
,
10206 _("unsupported die ref attribute form: '%s'"),
10207 dwarf_form_name (attr
->form
));
10211 /* Return the constant value held by the given attribute. Return -1
10212 if the value held by the attribute is not constant. */
10215 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10217 if (attr
->form
== DW_FORM_sdata
)
10218 return DW_SND (attr
);
10219 else if (attr
->form
== DW_FORM_udata
10220 || attr
->form
== DW_FORM_data1
10221 || attr
->form
== DW_FORM_data2
10222 || attr
->form
== DW_FORM_data4
10223 || attr
->form
== DW_FORM_data8
)
10224 return DW_UNSND (attr
);
10227 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10228 dwarf_form_name (attr
->form
));
10229 return default_value
;
10233 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10234 unit and add it to our queue.
10235 The result is non-zero if PER_CU was queued, otherwise the result is zero
10236 meaning either PER_CU is already queued or it is already loaded. */
10239 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10240 struct dwarf2_per_cu_data
*per_cu
)
10242 /* Mark the dependence relation so that we don't flush PER_CU
10244 dwarf2_add_dependence (this_cu
, per_cu
);
10246 /* If it's already on the queue, we have nothing to do. */
10247 if (per_cu
->queued
)
10250 /* If the compilation unit is already loaded, just mark it as
10252 if (per_cu
->cu
!= NULL
)
10254 per_cu
->cu
->last_used
= 0;
10258 /* Add it to the queue. */
10259 queue_comp_unit (per_cu
, this_cu
->objfile
);
10264 /* Follow reference or signature attribute ATTR of SRC_DIE.
10265 On entry *REF_CU is the CU of SRC_DIE.
10266 On exit *REF_CU is the CU of the result. */
10268 static struct die_info
*
10269 follow_die_ref_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10270 struct dwarf2_cu
**ref_cu
)
10272 struct die_info
*die
;
10274 if (is_ref_attr (attr
))
10275 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10276 else if (attr
->form
== DW_FORM_sig8
)
10277 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10280 dump_die_for_error (src_die
);
10281 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10282 (*ref_cu
)->objfile
->name
);
10288 /* Follow reference attribute ATTR of SRC_DIE.
10289 On entry *REF_CU is the CU of SRC_DIE.
10290 On exit *REF_CU is the CU of the result. */
10292 static struct die_info
*
10293 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10294 struct dwarf2_cu
**ref_cu
)
10296 struct die_info
*die
;
10297 unsigned int offset
;
10298 struct die_info temp_die
;
10299 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10301 gdb_assert (cu
->per_cu
!= NULL
);
10303 offset
= dwarf2_get_ref_die_offset (attr
);
10305 if (cu
->per_cu
->from_debug_types
)
10307 /* .debug_types CUs cannot reference anything outside their CU.
10308 If they need to, they have to reference a signatured type via
10310 if (! offset_in_cu_p (&cu
->header
, offset
))
10314 else if (! offset_in_cu_p (&cu
->header
, offset
))
10316 struct dwarf2_per_cu_data
*per_cu
;
10317 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10319 /* If necessary, add it to the queue and load its DIEs. */
10320 if (maybe_queue_comp_unit (cu
, per_cu
))
10321 load_full_comp_unit (per_cu
, cu
->objfile
);
10323 target_cu
= per_cu
->cu
;
10328 *ref_cu
= target_cu
;
10329 temp_die
.offset
= offset
;
10330 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10336 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10337 "at 0x%x [in module %s]"),
10338 offset
, src_die
->offset
, cu
->objfile
->name
);
10341 /* Follow the signature attribute ATTR in SRC_DIE.
10342 On entry *REF_CU is the CU of SRC_DIE.
10343 On exit *REF_CU is the CU of the result. */
10345 static struct die_info
*
10346 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10347 struct dwarf2_cu
**ref_cu
)
10349 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10350 struct die_info temp_die
;
10351 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10352 struct dwarf2_cu
*sig_cu
;
10353 struct die_info
*die
;
10355 /* sig_type will be NULL if the signatured type is missing from
10357 if (sig_type
== NULL
)
10358 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10359 "at 0x%x [in module %s]"),
10360 src_die
->offset
, objfile
->name
);
10362 /* If necessary, add it to the queue and load its DIEs. */
10364 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10365 read_signatured_type (objfile
, sig_type
);
10367 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10369 sig_cu
= sig_type
->per_cu
.cu
;
10370 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10371 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10378 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10379 "at 0x%x [in module %s]"),
10380 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10383 /* Given an offset of a signatured type, return its signatured_type. */
10385 static struct signatured_type
*
10386 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10388 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10389 unsigned int length
, initial_length_size
;
10390 unsigned int sig_offset
;
10391 struct signatured_type find_entry
, *type_sig
;
10393 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10394 sig_offset
= (initial_length_size
10396 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10397 + 1 /*address_size*/);
10398 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10399 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10401 /* This is only used to lookup previously recorded types.
10402 If we didn't find it, it's our bug. */
10403 gdb_assert (type_sig
!= NULL
);
10404 gdb_assert (offset
== type_sig
->offset
);
10409 /* Read in signatured type at OFFSET and build its CU and die(s). */
10412 read_signatured_type_at_offset (struct objfile
*objfile
,
10413 unsigned int offset
)
10415 struct signatured_type
*type_sig
;
10417 /* We have the section offset, but we need the signature to do the
10418 hash table lookup. */
10419 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10421 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10423 read_signatured_type (objfile
, type_sig
);
10425 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10428 /* Read in a signatured type and build its CU and DIEs. */
10431 read_signatured_type (struct objfile
*objfile
,
10432 struct signatured_type
*type_sig
)
10434 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10435 struct die_reader_specs reader_specs
;
10436 struct dwarf2_cu
*cu
;
10437 ULONGEST signature
;
10438 struct cleanup
*back_to
, *free_cu_cleanup
;
10439 struct attribute
*attr
;
10441 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10443 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10444 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10445 obstack_init (&cu
->comp_unit_obstack
);
10446 cu
->objfile
= objfile
;
10447 type_sig
->per_cu
.cu
= cu
;
10448 cu
->per_cu
= &type_sig
->per_cu
;
10450 /* If an error occurs while loading, release our storage. */
10451 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10453 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10454 types_ptr
, objfile
->obfd
);
10455 gdb_assert (signature
== type_sig
->signature
);
10458 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10462 &cu
->comp_unit_obstack
,
10463 hashtab_obstack_allocate
,
10464 dummy_obstack_deallocate
);
10466 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10467 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10469 init_cu_die_reader (&reader_specs
, cu
);
10471 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10474 /* We try not to read any attributes in this function, because not
10475 all objfiles needed for references have been loaded yet, and symbol
10476 table processing isn't initialized. But we have to set the CU language,
10477 or we won't be able to build types correctly. */
10478 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10480 set_cu_language (DW_UNSND (attr
), cu
);
10482 set_cu_language (language_minimal
, cu
);
10484 do_cleanups (back_to
);
10486 /* We've successfully allocated this compilation unit. Let our caller
10487 clean it up when finished with it. */
10488 discard_cleanups (free_cu_cleanup
);
10490 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10491 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10494 /* Decode simple location descriptions.
10495 Given a pointer to a dwarf block that defines a location, compute
10496 the location and return the value.
10498 NOTE drow/2003-11-18: This function is called in two situations
10499 now: for the address of static or global variables (partial symbols
10500 only) and for offsets into structures which are expected to be
10501 (more or less) constant. The partial symbol case should go away,
10502 and only the constant case should remain. That will let this
10503 function complain more accurately. A few special modes are allowed
10504 without complaint for global variables (for instance, global
10505 register values and thread-local values).
10507 A location description containing no operations indicates that the
10508 object is optimized out. The return value is 0 for that case.
10509 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10510 callers will only want a very basic result and this can become a
10513 Note that stack[0] is unused except as a default error return.
10514 Note that stack overflow is not yet handled. */
10517 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10519 struct objfile
*objfile
= cu
->objfile
;
10520 struct comp_unit_head
*cu_header
= &cu
->header
;
10522 int size
= blk
->size
;
10523 gdb_byte
*data
= blk
->data
;
10524 CORE_ADDR stack
[64];
10526 unsigned int bytes_read
, unsnd
;
10570 stack
[++stacki
] = op
- DW_OP_lit0
;
10605 stack
[++stacki
] = op
- DW_OP_reg0
;
10607 dwarf2_complex_location_expr_complaint ();
10611 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10613 stack
[++stacki
] = unsnd
;
10615 dwarf2_complex_location_expr_complaint ();
10619 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10624 case DW_OP_const1u
:
10625 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10629 case DW_OP_const1s
:
10630 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10634 case DW_OP_const2u
:
10635 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10639 case DW_OP_const2s
:
10640 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10644 case DW_OP_const4u
:
10645 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10649 case DW_OP_const4s
:
10650 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10655 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10661 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10666 stack
[stacki
+ 1] = stack
[stacki
];
10671 stack
[stacki
- 1] += stack
[stacki
];
10675 case DW_OP_plus_uconst
:
10676 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10681 stack
[stacki
- 1] -= stack
[stacki
];
10686 /* If we're not the last op, then we definitely can't encode
10687 this using GDB's address_class enum. This is valid for partial
10688 global symbols, although the variable's address will be bogus
10691 dwarf2_complex_location_expr_complaint ();
10694 case DW_OP_GNU_push_tls_address
:
10695 /* The top of the stack has the offset from the beginning
10696 of the thread control block at which the variable is located. */
10697 /* Nothing should follow this operator, so the top of stack would
10699 /* This is valid for partial global symbols, but the variable's
10700 address will be bogus in the psymtab. */
10702 dwarf2_complex_location_expr_complaint ();
10705 case DW_OP_GNU_uninit
:
10709 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
10710 dwarf_stack_op_name (op
));
10711 return (stack
[stacki
]);
10714 return (stack
[stacki
]);
10717 /* memory allocation interface */
10719 static struct dwarf_block
*
10720 dwarf_alloc_block (struct dwarf2_cu
*cu
)
10722 struct dwarf_block
*blk
;
10724 blk
= (struct dwarf_block
*)
10725 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
10729 static struct abbrev_info
*
10730 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
10732 struct abbrev_info
*abbrev
;
10734 abbrev
= (struct abbrev_info
*)
10735 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
10736 memset (abbrev
, 0, sizeof (struct abbrev_info
));
10740 static struct die_info
*
10741 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
10743 struct die_info
*die
;
10744 size_t size
= sizeof (struct die_info
);
10747 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
10749 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
10750 memset (die
, 0, sizeof (struct die_info
));
10755 /* Macro support. */
10758 /* Return the full name of file number I in *LH's file name table.
10759 Use COMP_DIR as the name of the current directory of the
10760 compilation. The result is allocated using xmalloc; the caller is
10761 responsible for freeing it. */
10763 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
10765 /* Is the file number a valid index into the line header's file name
10766 table? Remember that file numbers start with one, not zero. */
10767 if (1 <= file
&& file
<= lh
->num_file_names
)
10769 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10771 if (IS_ABSOLUTE_PATH (fe
->name
))
10772 return xstrdup (fe
->name
);
10780 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10786 dir_len
= strlen (dir
);
10787 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
10788 strcpy (full_name
, dir
);
10789 full_name
[dir_len
] = '/';
10790 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
10794 return xstrdup (fe
->name
);
10799 /* The compiler produced a bogus file number. We can at least
10800 record the macro definitions made in the file, even if we
10801 won't be able to find the file by name. */
10802 char fake_name
[80];
10803 sprintf (fake_name
, "<bad macro file number %d>", file
);
10805 complaint (&symfile_complaints
,
10806 _("bad file number in macro information (%d)"),
10809 return xstrdup (fake_name
);
10814 static struct macro_source_file
*
10815 macro_start_file (int file
, int line
,
10816 struct macro_source_file
*current_file
,
10817 const char *comp_dir
,
10818 struct line_header
*lh
, struct objfile
*objfile
)
10820 /* The full name of this source file. */
10821 char *full_name
= file_full_name (file
, lh
, comp_dir
);
10823 /* We don't create a macro table for this compilation unit
10824 at all until we actually get a filename. */
10825 if (! pending_macros
)
10826 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
10827 objfile
->macro_cache
);
10829 if (! current_file
)
10830 /* If we have no current file, then this must be the start_file
10831 directive for the compilation unit's main source file. */
10832 current_file
= macro_set_main (pending_macros
, full_name
);
10834 current_file
= macro_include (current_file
, line
, full_name
);
10838 return current_file
;
10842 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10843 followed by a null byte. */
10845 copy_string (const char *buf
, int len
)
10847 char *s
= xmalloc (len
+ 1);
10848 memcpy (s
, buf
, len
);
10855 static const char *
10856 consume_improper_spaces (const char *p
, const char *body
)
10860 complaint (&symfile_complaints
,
10861 _("macro definition contains spaces in formal argument list:\n`%s'"),
10873 parse_macro_definition (struct macro_source_file
*file
, int line
,
10878 /* The body string takes one of two forms. For object-like macro
10879 definitions, it should be:
10881 <macro name> " " <definition>
10883 For function-like macro definitions, it should be:
10885 <macro name> "() " <definition>
10887 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10889 Spaces may appear only where explicitly indicated, and in the
10892 The Dwarf 2 spec says that an object-like macro's name is always
10893 followed by a space, but versions of GCC around March 2002 omit
10894 the space when the macro's definition is the empty string.
10896 The Dwarf 2 spec says that there should be no spaces between the
10897 formal arguments in a function-like macro's formal argument list,
10898 but versions of GCC around March 2002 include spaces after the
10902 /* Find the extent of the macro name. The macro name is terminated
10903 by either a space or null character (for an object-like macro) or
10904 an opening paren (for a function-like macro). */
10905 for (p
= body
; *p
; p
++)
10906 if (*p
== ' ' || *p
== '(')
10909 if (*p
== ' ' || *p
== '\0')
10911 /* It's an object-like macro. */
10912 int name_len
= p
- body
;
10913 char *name
= copy_string (body
, name_len
);
10914 const char *replacement
;
10917 replacement
= body
+ name_len
+ 1;
10920 dwarf2_macro_malformed_definition_complaint (body
);
10921 replacement
= body
+ name_len
;
10924 macro_define_object (file
, line
, name
, replacement
);
10928 else if (*p
== '(')
10930 /* It's a function-like macro. */
10931 char *name
= copy_string (body
, p
- body
);
10934 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
10938 p
= consume_improper_spaces (p
, body
);
10940 /* Parse the formal argument list. */
10941 while (*p
&& *p
!= ')')
10943 /* Find the extent of the current argument name. */
10944 const char *arg_start
= p
;
10946 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
10949 if (! *p
|| p
== arg_start
)
10950 dwarf2_macro_malformed_definition_complaint (body
);
10953 /* Make sure argv has room for the new argument. */
10954 if (argc
>= argv_size
)
10957 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
10960 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
10963 p
= consume_improper_spaces (p
, body
);
10965 /* Consume the comma, if present. */
10970 p
= consume_improper_spaces (p
, body
);
10979 /* Perfectly formed definition, no complaints. */
10980 macro_define_function (file
, line
, name
,
10981 argc
, (const char **) argv
,
10983 else if (*p
== '\0')
10985 /* Complain, but do define it. */
10986 dwarf2_macro_malformed_definition_complaint (body
);
10987 macro_define_function (file
, line
, name
,
10988 argc
, (const char **) argv
,
10992 /* Just complain. */
10993 dwarf2_macro_malformed_definition_complaint (body
);
10996 /* Just complain. */
10997 dwarf2_macro_malformed_definition_complaint (body
);
11003 for (i
= 0; i
< argc
; i
++)
11009 dwarf2_macro_malformed_definition_complaint (body
);
11014 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11015 char *comp_dir
, bfd
*abfd
,
11016 struct dwarf2_cu
*cu
)
11018 gdb_byte
*mac_ptr
, *mac_end
;
11019 struct macro_source_file
*current_file
= 0;
11020 enum dwarf_macinfo_record_type macinfo_type
;
11021 int at_commandline
;
11023 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11025 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11029 /* First pass: Find the name of the base filename.
11030 This filename is needed in order to process all macros whose definition
11031 (or undefinition) comes from the command line. These macros are defined
11032 before the first DW_MACINFO_start_file entry, and yet still need to be
11033 associated to the base file.
11035 To determine the base file name, we scan the macro definitions until we
11036 reach the first DW_MACINFO_start_file entry. We then initialize
11037 CURRENT_FILE accordingly so that any macro definition found before the
11038 first DW_MACINFO_start_file can still be associated to the base file. */
11040 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11041 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11042 + dwarf2_per_objfile
->macinfo
.size
;
11046 /* Do we at least have room for a macinfo type byte? */
11047 if (mac_ptr
>= mac_end
)
11049 /* Complaint is printed during the second pass as GDB will probably
11050 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11054 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11057 switch (macinfo_type
)
11059 /* A zero macinfo type indicates the end of the macro
11064 case DW_MACINFO_define
:
11065 case DW_MACINFO_undef
:
11066 /* Only skip the data by MAC_PTR. */
11068 unsigned int bytes_read
;
11070 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11071 mac_ptr
+= bytes_read
;
11072 read_string (abfd
, mac_ptr
, &bytes_read
);
11073 mac_ptr
+= bytes_read
;
11077 case DW_MACINFO_start_file
:
11079 unsigned int bytes_read
;
11082 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11083 mac_ptr
+= bytes_read
;
11084 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11085 mac_ptr
+= bytes_read
;
11087 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11092 case DW_MACINFO_end_file
:
11093 /* No data to skip by MAC_PTR. */
11096 case DW_MACINFO_vendor_ext
:
11097 /* Only skip the data by MAC_PTR. */
11099 unsigned int bytes_read
;
11101 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11102 mac_ptr
+= bytes_read
;
11103 read_string (abfd
, mac_ptr
, &bytes_read
);
11104 mac_ptr
+= bytes_read
;
11111 } while (macinfo_type
!= 0 && current_file
== NULL
);
11113 /* Second pass: Process all entries.
11115 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11116 command-line macro definitions/undefinitions. This flag is unset when we
11117 reach the first DW_MACINFO_start_file entry. */
11119 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11121 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11122 GDB is still reading the definitions from command line. First
11123 DW_MACINFO_start_file will need to be ignored as it was already executed
11124 to create CURRENT_FILE for the main source holding also the command line
11125 definitions. On first met DW_MACINFO_start_file this flag is reset to
11126 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11128 at_commandline
= 1;
11132 /* Do we at least have room for a macinfo type byte? */
11133 if (mac_ptr
>= mac_end
)
11135 dwarf2_macros_too_long_complaint ();
11139 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11142 switch (macinfo_type
)
11144 /* A zero macinfo type indicates the end of the macro
11149 case DW_MACINFO_define
:
11150 case DW_MACINFO_undef
:
11152 unsigned int bytes_read
;
11156 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11157 mac_ptr
+= bytes_read
;
11158 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11159 mac_ptr
+= bytes_read
;
11161 if (! current_file
)
11163 /* DWARF violation as no main source is present. */
11164 complaint (&symfile_complaints
,
11165 _("debug info with no main source gives macro %s "
11167 macinfo_type
== DW_MACINFO_define
?
11169 macinfo_type
== DW_MACINFO_undef
?
11170 _("undefinition") :
11171 _("something-or-other"), line
, body
);
11174 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11175 complaint (&symfile_complaints
,
11176 _("debug info gives %s macro %s with %s line %d: %s"),
11177 at_commandline
? _("command-line") : _("in-file"),
11178 macinfo_type
== DW_MACINFO_define
?
11180 macinfo_type
== DW_MACINFO_undef
?
11181 _("undefinition") :
11182 _("something-or-other"),
11183 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11185 if (macinfo_type
== DW_MACINFO_define
)
11186 parse_macro_definition (current_file
, line
, body
);
11187 else if (macinfo_type
== DW_MACINFO_undef
)
11188 macro_undef (current_file
, line
, body
);
11192 case DW_MACINFO_start_file
:
11194 unsigned int bytes_read
;
11197 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11198 mac_ptr
+= bytes_read
;
11199 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11200 mac_ptr
+= bytes_read
;
11202 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11203 complaint (&symfile_complaints
,
11204 _("debug info gives source %d included "
11205 "from %s at %s line %d"),
11206 file
, at_commandline
? _("command-line") : _("file"),
11207 line
== 0 ? _("zero") : _("non-zero"), line
);
11209 if (at_commandline
)
11211 /* This DW_MACINFO_start_file was executed in the pass one. */
11212 at_commandline
= 0;
11215 current_file
= macro_start_file (file
, line
,
11216 current_file
, comp_dir
,
11221 case DW_MACINFO_end_file
:
11222 if (! current_file
)
11223 complaint (&symfile_complaints
,
11224 _("macro debug info has an unmatched `close_file' directive"));
11227 current_file
= current_file
->included_by
;
11228 if (! current_file
)
11230 enum dwarf_macinfo_record_type next_type
;
11232 /* GCC circa March 2002 doesn't produce the zero
11233 type byte marking the end of the compilation
11234 unit. Complain if it's not there, but exit no
11237 /* Do we at least have room for a macinfo type byte? */
11238 if (mac_ptr
>= mac_end
)
11240 dwarf2_macros_too_long_complaint ();
11244 /* We don't increment mac_ptr here, so this is just
11246 next_type
= read_1_byte (abfd
, mac_ptr
);
11247 if (next_type
!= 0)
11248 complaint (&symfile_complaints
,
11249 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11256 case DW_MACINFO_vendor_ext
:
11258 unsigned int bytes_read
;
11262 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11263 mac_ptr
+= bytes_read
;
11264 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11265 mac_ptr
+= bytes_read
;
11267 /* We don't recognize any vendor extensions. */
11271 } while (macinfo_type
!= 0);
11274 /* Check if the attribute's form is a DW_FORM_block*
11275 if so return true else false. */
11277 attr_form_is_block (struct attribute
*attr
)
11279 return (attr
== NULL
? 0 :
11280 attr
->form
== DW_FORM_block1
11281 || attr
->form
== DW_FORM_block2
11282 || attr
->form
== DW_FORM_block4
11283 || attr
->form
== DW_FORM_block
);
11286 /* Return non-zero if ATTR's value is a section offset --- classes
11287 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11288 You may use DW_UNSND (attr) to retrieve such offsets.
11290 Section 7.5.4, "Attribute Encodings", explains that no attribute
11291 may have a value that belongs to more than one of these classes; it
11292 would be ambiguous if we did, because we use the same forms for all
11295 attr_form_is_section_offset (struct attribute
*attr
)
11297 return (attr
->form
== DW_FORM_data4
11298 || attr
->form
== DW_FORM_data8
);
11302 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11303 zero otherwise. When this function returns true, you can apply
11304 dwarf2_get_attr_constant_value to it.
11306 However, note that for some attributes you must check
11307 attr_form_is_section_offset before using this test. DW_FORM_data4
11308 and DW_FORM_data8 are members of both the constant class, and of
11309 the classes that contain offsets into other debug sections
11310 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11311 that, if an attribute's can be either a constant or one of the
11312 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11313 taken as section offsets, not constants. */
11315 attr_form_is_constant (struct attribute
*attr
)
11317 switch (attr
->form
)
11319 case DW_FORM_sdata
:
11320 case DW_FORM_udata
:
11321 case DW_FORM_data1
:
11322 case DW_FORM_data2
:
11323 case DW_FORM_data4
:
11324 case DW_FORM_data8
:
11332 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11333 struct dwarf2_cu
*cu
)
11335 if (attr_form_is_section_offset (attr
)
11336 /* ".debug_loc" may not exist at all, or the offset may be outside
11337 the section. If so, fall through to the complaint in the
11339 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11341 struct dwarf2_loclist_baton
*baton
;
11343 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11344 sizeof (struct dwarf2_loclist_baton
));
11345 baton
->per_cu
= cu
->per_cu
;
11346 gdb_assert (baton
->per_cu
);
11348 /* We don't know how long the location list is, but make sure we
11349 don't run off the edge of the section. */
11350 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11351 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11352 baton
->base_address
= cu
->base_address
;
11353 if (cu
->base_known
== 0)
11354 complaint (&symfile_complaints
,
11355 _("Location list used without specifying the CU base address."));
11357 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11358 SYMBOL_LOCATION_BATON (sym
) = baton
;
11362 struct dwarf2_locexpr_baton
*baton
;
11364 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11365 sizeof (struct dwarf2_locexpr_baton
));
11366 baton
->per_cu
= cu
->per_cu
;
11367 gdb_assert (baton
->per_cu
);
11369 if (attr_form_is_block (attr
))
11371 /* Note that we're just copying the block's data pointer
11372 here, not the actual data. We're still pointing into the
11373 info_buffer for SYM's objfile; right now we never release
11374 that buffer, but when we do clean up properly this may
11376 baton
->size
= DW_BLOCK (attr
)->size
;
11377 baton
->data
= DW_BLOCK (attr
)->data
;
11381 dwarf2_invalid_attrib_class_complaint ("location description",
11382 SYMBOL_NATURAL_NAME (sym
));
11384 baton
->data
= NULL
;
11387 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11388 SYMBOL_LOCATION_BATON (sym
) = baton
;
11392 /* Return the OBJFILE associated with the compilation unit CU. */
11395 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11397 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11399 /* Return the master objfile, so that we can report and look up the
11400 correct file containing this variable. */
11401 if (objfile
->separate_debug_objfile_backlink
)
11402 objfile
= objfile
->separate_debug_objfile_backlink
;
11407 /* Return the address size given in the compilation unit header for CU. */
11410 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11413 return per_cu
->cu
->header
.addr_size
;
11416 /* If the CU is not currently read in, we re-read its header. */
11417 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11418 struct dwarf2_per_objfile
*per_objfile
11419 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11420 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11422 struct comp_unit_head cu_header
;
11423 memset (&cu_header
, 0, sizeof cu_header
);
11424 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11425 return cu_header
.addr_size
;
11429 /* Locate the .debug_info compilation unit from CU's objfile which contains
11430 the DIE at OFFSET. Raises an error on failure. */
11432 static struct dwarf2_per_cu_data
*
11433 dwarf2_find_containing_comp_unit (unsigned int offset
,
11434 struct objfile
*objfile
)
11436 struct dwarf2_per_cu_data
*this_cu
;
11440 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11443 int mid
= low
+ (high
- low
) / 2;
11444 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11449 gdb_assert (low
== high
);
11450 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11453 error (_("Dwarf Error: could not find partial DIE containing "
11454 "offset 0x%lx [in module %s]"),
11455 (long) offset
, bfd_get_filename (objfile
->obfd
));
11457 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11458 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11462 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11463 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11464 && offset
>= this_cu
->offset
+ this_cu
->length
)
11465 error (_("invalid dwarf2 offset %u"), offset
);
11466 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11471 /* Locate the compilation unit from OBJFILE which is located at exactly
11472 OFFSET. Raises an error on failure. */
11474 static struct dwarf2_per_cu_data
*
11475 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11477 struct dwarf2_per_cu_data
*this_cu
;
11478 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11479 if (this_cu
->offset
!= offset
)
11480 error (_("no compilation unit with offset %u."), offset
);
11484 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11486 static struct dwarf2_cu
*
11487 alloc_one_comp_unit (struct objfile
*objfile
)
11489 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11490 cu
->objfile
= objfile
;
11491 obstack_init (&cu
->comp_unit_obstack
);
11495 /* Release one cached compilation unit, CU. We unlink it from the tree
11496 of compilation units, but we don't remove it from the read_in_chain;
11497 the caller is responsible for that.
11498 NOTE: DATA is a void * because this function is also used as a
11499 cleanup routine. */
11502 free_one_comp_unit (void *data
)
11504 struct dwarf2_cu
*cu
= data
;
11506 if (cu
->per_cu
!= NULL
)
11507 cu
->per_cu
->cu
= NULL
;
11510 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11515 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11516 when we're finished with it. We can't free the pointer itself, but be
11517 sure to unlink it from the cache. Also release any associated storage
11518 and perform cache maintenance.
11520 Only used during partial symbol parsing. */
11523 free_stack_comp_unit (void *data
)
11525 struct dwarf2_cu
*cu
= data
;
11527 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11528 cu
->partial_dies
= NULL
;
11530 if (cu
->per_cu
!= NULL
)
11532 /* This compilation unit is on the stack in our caller, so we
11533 should not xfree it. Just unlink it. */
11534 cu
->per_cu
->cu
= NULL
;
11537 /* If we had a per-cu pointer, then we may have other compilation
11538 units loaded, so age them now. */
11539 age_cached_comp_units ();
11543 /* Free all cached compilation units. */
11546 free_cached_comp_units (void *data
)
11548 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11550 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11551 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11552 while (per_cu
!= NULL
)
11554 struct dwarf2_per_cu_data
*next_cu
;
11556 next_cu
= per_cu
->cu
->read_in_chain
;
11558 free_one_comp_unit (per_cu
->cu
);
11559 *last_chain
= next_cu
;
11565 /* Increase the age counter on each cached compilation unit, and free
11566 any that are too old. */
11569 age_cached_comp_units (void)
11571 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11573 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11574 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11575 while (per_cu
!= NULL
)
11577 per_cu
->cu
->last_used
++;
11578 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11579 dwarf2_mark (per_cu
->cu
);
11580 per_cu
= per_cu
->cu
->read_in_chain
;
11583 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11584 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11585 while (per_cu
!= NULL
)
11587 struct dwarf2_per_cu_data
*next_cu
;
11589 next_cu
= per_cu
->cu
->read_in_chain
;
11591 if (!per_cu
->cu
->mark
)
11593 free_one_comp_unit (per_cu
->cu
);
11594 *last_chain
= next_cu
;
11597 last_chain
= &per_cu
->cu
->read_in_chain
;
11603 /* Remove a single compilation unit from the cache. */
11606 free_one_cached_comp_unit (void *target_cu
)
11608 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11610 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11611 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11612 while (per_cu
!= NULL
)
11614 struct dwarf2_per_cu_data
*next_cu
;
11616 next_cu
= per_cu
->cu
->read_in_chain
;
11618 if (per_cu
->cu
== target_cu
)
11620 free_one_comp_unit (per_cu
->cu
);
11621 *last_chain
= next_cu
;
11625 last_chain
= &per_cu
->cu
->read_in_chain
;
11631 /* Release all extra memory associated with OBJFILE. */
11634 dwarf2_free_objfile (struct objfile
*objfile
)
11636 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11638 if (dwarf2_per_objfile
== NULL
)
11641 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11642 free_cached_comp_units (NULL
);
11644 /* Everything else should be on the objfile obstack. */
11647 /* A pair of DIE offset and GDB type pointer. We store these
11648 in a hash table separate from the DIEs, and preserve them
11649 when the DIEs are flushed out of cache. */
11651 struct dwarf2_offset_and_type
11653 unsigned int offset
;
11657 /* Hash function for a dwarf2_offset_and_type. */
11660 offset_and_type_hash (const void *item
)
11662 const struct dwarf2_offset_and_type
*ofs
= item
;
11663 return ofs
->offset
;
11666 /* Equality function for a dwarf2_offset_and_type. */
11669 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11671 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11672 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11673 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11676 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11677 table if necessary. For convenience, return TYPE. */
11679 static struct type
*
11680 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11682 struct dwarf2_offset_and_type
**slot
, ofs
;
11684 if (cu
->type_hash
== NULL
)
11686 gdb_assert (cu
->per_cu
!= NULL
);
11687 cu
->per_cu
->type_hash
11688 = htab_create_alloc_ex (cu
->header
.length
/ 24,
11689 offset_and_type_hash
,
11690 offset_and_type_eq
,
11692 &cu
->objfile
->objfile_obstack
,
11693 hashtab_obstack_allocate
,
11694 dummy_obstack_deallocate
);
11695 cu
->type_hash
= cu
->per_cu
->type_hash
;
11698 ofs
.offset
= die
->offset
;
11700 slot
= (struct dwarf2_offset_and_type
**)
11701 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
11702 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
11707 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11708 not have a saved type. */
11710 static struct type
*
11711 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11713 struct dwarf2_offset_and_type
*slot
, ofs
;
11714 htab_t type_hash
= cu
->type_hash
;
11716 if (type_hash
== NULL
)
11719 ofs
.offset
= die
->offset
;
11720 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
11727 /* Add a dependence relationship from CU to REF_PER_CU. */
11730 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
11731 struct dwarf2_per_cu_data
*ref_per_cu
)
11735 if (cu
->dependencies
== NULL
)
11737 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
11738 NULL
, &cu
->comp_unit_obstack
,
11739 hashtab_obstack_allocate
,
11740 dummy_obstack_deallocate
);
11742 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
11744 *slot
= ref_per_cu
;
11747 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11748 Set the mark field in every compilation unit in the
11749 cache that we must keep because we are keeping CU. */
11752 dwarf2_mark_helper (void **slot
, void *data
)
11754 struct dwarf2_per_cu_data
*per_cu
;
11756 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
11757 if (per_cu
->cu
->mark
)
11759 per_cu
->cu
->mark
= 1;
11761 if (per_cu
->cu
->dependencies
!= NULL
)
11762 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11767 /* Set the mark field in CU and in every other compilation unit in the
11768 cache that we must keep because we are keeping CU. */
11771 dwarf2_mark (struct dwarf2_cu
*cu
)
11776 if (cu
->dependencies
!= NULL
)
11777 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11781 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
11785 per_cu
->cu
->mark
= 0;
11786 per_cu
= per_cu
->cu
->read_in_chain
;
11790 /* Trivial hash function for partial_die_info: the hash value of a DIE
11791 is its offset in .debug_info for this objfile. */
11794 partial_die_hash (const void *item
)
11796 const struct partial_die_info
*part_die
= item
;
11797 return part_die
->offset
;
11800 /* Trivial comparison function for partial_die_info structures: two DIEs
11801 are equal if they have the same offset. */
11804 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
11806 const struct partial_die_info
*part_die_lhs
= item_lhs
;
11807 const struct partial_die_info
*part_die_rhs
= item_rhs
;
11808 return part_die_lhs
->offset
== part_die_rhs
->offset
;
11811 static struct cmd_list_element
*set_dwarf2_cmdlist
;
11812 static struct cmd_list_element
*show_dwarf2_cmdlist
;
11815 set_dwarf2_cmd (char *args
, int from_tty
)
11817 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
11821 show_dwarf2_cmd (char *args
, int from_tty
)
11823 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
11826 /* If section described by INFO was mmapped, munmap it now. */
11829 munmap_section_buffer (struct dwarf2_section_info
*info
)
11831 if (info
->was_mmapped
)
11834 intptr_t begin
= (intptr_t) info
->buffer
;
11835 intptr_t map_begin
= begin
& ~(pagesize
- 1);
11836 size_t map_length
= info
->size
+ begin
- map_begin
;
11837 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
11839 /* Without HAVE_MMAP, we should never be here to begin with. */
11845 /* munmap debug sections for OBJFILE, if necessary. */
11848 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
11850 struct dwarf2_per_objfile
*data
= d
;
11851 munmap_section_buffer (&data
->info
);
11852 munmap_section_buffer (&data
->abbrev
);
11853 munmap_section_buffer (&data
->line
);
11854 munmap_section_buffer (&data
->str
);
11855 munmap_section_buffer (&data
->macinfo
);
11856 munmap_section_buffer (&data
->ranges
);
11857 munmap_section_buffer (&data
->loc
);
11858 munmap_section_buffer (&data
->frame
);
11859 munmap_section_buffer (&data
->eh_frame
);
11862 void _initialize_dwarf2_read (void);
11865 _initialize_dwarf2_read (void)
11867 dwarf2_objfile_data_key
11868 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
11870 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
11871 Set DWARF 2 specific variables.\n\
11872 Configure DWARF 2 variables such as the cache size"),
11873 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
11874 0/*allow-unknown*/, &maintenance_set_cmdlist
);
11876 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
11877 Show DWARF 2 specific variables\n\
11878 Show DWARF 2 variables such as the cache size"),
11879 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
11880 0/*allow-unknown*/, &maintenance_show_cmdlist
);
11882 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
11883 &dwarf2_max_cache_age
, _("\
11884 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
11885 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
11886 A higher limit means that cached compilation units will be stored\n\
11887 in memory longer, and more total memory will be used. Zero disables\n\
11888 caching, which can slow down startup."),
11890 show_dwarf2_max_cache_age
,
11891 &set_dwarf2_cmdlist
,
11892 &show_dwarf2_cmdlist
);
11894 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
11895 Set debugging of the dwarf2 DIE reader."), _("\
11896 Show debugging of the dwarf2 DIE reader."), _("\
11897 When enabled (non-zero), DIEs are dumped after they are read in.\n\
11898 The value is the maximum depth to print."),
11901 &setdebuglist
, &showdebuglist
);