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>
62 #define MAP_FAILED ((void *) -1)
67 /* .debug_info header for a compilation unit
68 Because of alignment constraints, this structure has padding and cannot
69 be mapped directly onto the beginning of the .debug_info section. */
70 typedef struct comp_unit_header
72 unsigned int length
; /* length of the .debug_info
74 unsigned short version
; /* version number -- 2 for DWARF
76 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
77 unsigned char addr_size
; /* byte size of an address -- 4 */
80 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
83 /* .debug_pubnames header
84 Because of alignment constraints, this structure has padding and cannot
85 be mapped directly onto the beginning of the .debug_info section. */
86 typedef struct pubnames_header
88 unsigned int length
; /* length of the .debug_pubnames
90 unsigned char version
; /* version number -- 2 for DWARF
92 unsigned int info_offset
; /* offset into .debug_info section */
93 unsigned int info_size
; /* byte size of .debug_info section
97 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
99 /* .debug_pubnames header
100 Because of alignment constraints, this structure has padding and cannot
101 be mapped directly onto the beginning of the .debug_info section. */
102 typedef struct aranges_header
104 unsigned int length
; /* byte len of the .debug_aranges
106 unsigned short version
; /* version number -- 2 for DWARF
108 unsigned int info_offset
; /* offset into .debug_info section */
109 unsigned char addr_size
; /* byte size of an address */
110 unsigned char seg_size
; /* byte size of segment descriptor */
113 #define _ACTUAL_ARANGES_HEADER_SIZE 12
115 /* .debug_line statement program prologue
116 Because of alignment constraints, this structure has padding and cannot
117 be mapped directly onto the beginning of the .debug_info section. */
118 typedef struct statement_prologue
120 unsigned int total_length
; /* byte length of the statement
122 unsigned short version
; /* version number -- 2 for DWARF
124 unsigned int prologue_length
; /* # bytes between prologue &
126 unsigned char minimum_instruction_length
; /* byte size of
128 unsigned char default_is_stmt
; /* initial value of is_stmt
131 unsigned char line_range
;
132 unsigned char opcode_base
; /* number assigned to first special
134 unsigned char *standard_opcode_lengths
;
138 /* When non-zero, dump DIEs after they are read in. */
139 static int dwarf2_die_debug
= 0;
143 /* When set, the file that we're processing is known to have debugging
144 info for C++ namespaces. GCC 3.3.x did not produce this information,
145 but later versions do. */
147 static int processing_has_namespace_info
;
149 static const struct objfile_data
*dwarf2_objfile_data_key
;
151 struct dwarf2_section_info
159 struct dwarf2_per_objfile
161 struct dwarf2_section_info info
;
162 struct dwarf2_section_info abbrev
;
163 struct dwarf2_section_info line
;
164 struct dwarf2_section_info pubnames
;
165 struct dwarf2_section_info aranges
;
166 struct dwarf2_section_info loc
;
167 struct dwarf2_section_info macinfo
;
168 struct dwarf2_section_info str
;
169 struct dwarf2_section_info ranges
;
170 struct dwarf2_section_info types
;
171 struct dwarf2_section_info frame
;
172 struct dwarf2_section_info eh_frame
;
174 /* A list of all the compilation units. This is used to locate
175 the target compilation unit of a particular reference. */
176 struct dwarf2_per_cu_data
**all_comp_units
;
178 /* The number of compilation units in ALL_COMP_UNITS. */
181 /* A chain of compilation units that are currently read in, so that
182 they can be freed later. */
183 struct dwarf2_per_cu_data
*read_in_chain
;
185 /* A table mapping .debug_types signatures to its signatured_type entry.
186 This is NULL if the .debug_types section hasn't been read in yet. */
187 htab_t signatured_types
;
189 /* A flag indicating wether this objfile has a section loaded at a
191 int has_section_at_zero
;
194 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
196 /* names of the debugging sections */
198 /* Note that if the debugging section has been compressed, it might
199 have a name like .zdebug_info. */
201 #define INFO_SECTION "debug_info"
202 #define ABBREV_SECTION "debug_abbrev"
203 #define LINE_SECTION "debug_line"
204 #define PUBNAMES_SECTION "debug_pubnames"
205 #define ARANGES_SECTION "debug_aranges"
206 #define LOC_SECTION "debug_loc"
207 #define MACINFO_SECTION "debug_macinfo"
208 #define STR_SECTION "debug_str"
209 #define RANGES_SECTION "debug_ranges"
210 #define TYPES_SECTION "debug_types"
211 #define FRAME_SECTION "debug_frame"
212 #define EH_FRAME_SECTION "eh_frame"
214 /* local data types */
216 /* We hold several abbreviation tables in memory at the same time. */
217 #ifndef ABBREV_HASH_SIZE
218 #define ABBREV_HASH_SIZE 121
221 /* The data in a compilation unit header, after target2host
222 translation, looks like this. */
223 struct comp_unit_head
227 unsigned char addr_size
;
228 unsigned char signed_addr_p
;
229 unsigned int abbrev_offset
;
231 /* Size of file offsets; either 4 or 8. */
232 unsigned int offset_size
;
234 /* Size of the length field; either 4 or 12. */
235 unsigned int initial_length_size
;
237 /* Offset to the first byte of this compilation unit header in the
238 .debug_info section, for resolving relative reference dies. */
241 /* Offset to first die in this cu from the start of the cu.
242 This will be the first byte following the compilation unit header. */
243 unsigned int first_die_offset
;
246 /* Internal state when decoding a particular compilation unit. */
249 /* The objfile containing this compilation unit. */
250 struct objfile
*objfile
;
252 /* The header of the compilation unit. */
253 struct comp_unit_head header
;
255 /* Base address of this compilation unit. */
256 CORE_ADDR base_address
;
258 /* Non-zero if base_address has been set. */
261 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
263 /* The language we are debugging. */
264 enum language language
;
265 const struct language_defn
*language_defn
;
267 const char *producer
;
269 /* The generic symbol table building routines have separate lists for
270 file scope symbols and all all other scopes (local scopes). So
271 we need to select the right one to pass to add_symbol_to_list().
272 We do it by keeping a pointer to the correct list in list_in_scope.
274 FIXME: The original dwarf code just treated the file scope as the
275 first local scope, and all other local scopes as nested local
276 scopes, and worked fine. Check to see if we really need to
277 distinguish these in buildsym.c. */
278 struct pending
**list_in_scope
;
280 /* DWARF abbreviation table associated with this compilation unit. */
281 struct abbrev_info
**dwarf2_abbrevs
;
283 /* Storage for the abbrev table. */
284 struct obstack abbrev_obstack
;
286 /* Hash table holding all the loaded partial DIEs. */
289 /* Storage for things with the same lifetime as this read-in compilation
290 unit, including partial DIEs. */
291 struct obstack comp_unit_obstack
;
293 /* When multiple dwarf2_cu structures are living in memory, this field
294 chains them all together, so that they can be released efficiently.
295 We will probably also want a generation counter so that most-recently-used
296 compilation units are cached... */
297 struct dwarf2_per_cu_data
*read_in_chain
;
299 /* Backchain to our per_cu entry if the tree has been built. */
300 struct dwarf2_per_cu_data
*per_cu
;
302 /* Pointer to the die -> type map. Although it is stored
303 permanently in per_cu, we copy it here to avoid double
307 /* How many compilation units ago was this CU last referenced? */
310 /* A hash table of die offsets for following references. */
313 /* Full DIEs if read in. */
314 struct die_info
*dies
;
316 /* A set of pointers to dwarf2_per_cu_data objects for compilation
317 units referenced by this one. Only set during full symbol processing;
318 partial symbol tables do not have dependencies. */
321 /* Header data from the line table, during full symbol processing. */
322 struct line_header
*line_header
;
324 /* Mark used when releasing cached dies. */
325 unsigned int mark
: 1;
327 /* This flag will be set if this compilation unit might include
328 inter-compilation-unit references. */
329 unsigned int has_form_ref_addr
: 1;
331 /* This flag will be set if this compilation unit includes any
332 DW_TAG_namespace DIEs. If we know that there are explicit
333 DIEs for namespaces, we don't need to try to infer them
334 from mangled names. */
335 unsigned int has_namespace_info
: 1;
338 /* Persistent data held for a compilation unit, even when not
339 processing it. We put a pointer to this structure in the
340 read_symtab_private field of the psymtab. If we encounter
341 inter-compilation-unit references, we also maintain a sorted
342 list of all compilation units. */
344 struct dwarf2_per_cu_data
346 /* The start offset and length of this compilation unit. 2**29-1
347 bytes should suffice to store the length of any compilation unit
348 - if it doesn't, GDB will fall over anyway.
349 NOTE: Unlike comp_unit_head.length, this length includes
350 initial_length_size. */
352 unsigned int length
: 29;
354 /* Flag indicating this compilation unit will be read in before
355 any of the current compilation units are processed. */
356 unsigned int queued
: 1;
358 /* This flag will be set if we need to load absolutely all DIEs
359 for this compilation unit, instead of just the ones we think
360 are interesting. It gets set if we look for a DIE in the
361 hash table and don't find it. */
362 unsigned int load_all_dies
: 1;
364 /* Non-zero if this CU is from .debug_types.
365 Otherwise it's from .debug_info. */
366 unsigned int from_debug_types
: 1;
368 /* Set iff currently read in. */
369 struct dwarf2_cu
*cu
;
371 /* If full symbols for this CU have been read in, then this field
372 holds a map of DIE offsets to types. It isn't always possible
373 to reconstruct this information later, so we have to preserve
377 /* The partial symbol table associated with this compilation unit,
378 or NULL for partial units (which do not have an associated
380 struct partial_symtab
*psymtab
;
383 /* Entry in the signatured_types hash table. */
385 struct signatured_type
389 /* Offset in .debug_types of the TU (type_unit) for this type. */
392 /* Offset in .debug_types of the type defined by this TU. */
393 unsigned int type_offset
;
395 /* The CU(/TU) of this type. */
396 struct dwarf2_per_cu_data per_cu
;
399 /* Struct used to pass misc. parameters to read_die_and_children, et. al.
400 which are used for both .debug_info and .debug_types dies.
401 All parameters here are unchanging for the life of the call.
402 This struct exists to abstract away the constant parameters of
405 struct die_reader_specs
407 /* The bfd of this objfile. */
410 /* The CU of the DIE we are parsing. */
411 struct dwarf2_cu
*cu
;
413 /* Pointer to start of section buffer.
414 This is either the start of .debug_info or .debug_types. */
415 const gdb_byte
*buffer
;
418 /* The line number information for a compilation unit (found in the
419 .debug_line section) begins with a "statement program header",
420 which contains the following information. */
423 unsigned int total_length
;
424 unsigned short version
;
425 unsigned int header_length
;
426 unsigned char minimum_instruction_length
;
427 unsigned char default_is_stmt
;
429 unsigned char line_range
;
430 unsigned char opcode_base
;
432 /* standard_opcode_lengths[i] is the number of operands for the
433 standard opcode whose value is i. This means that
434 standard_opcode_lengths[0] is unused, and the last meaningful
435 element is standard_opcode_lengths[opcode_base - 1]. */
436 unsigned char *standard_opcode_lengths
;
438 /* The include_directories table. NOTE! These strings are not
439 allocated with xmalloc; instead, they are pointers into
440 debug_line_buffer. If you try to free them, `free' will get
442 unsigned int num_include_dirs
, include_dirs_size
;
445 /* The file_names table. NOTE! These strings are not allocated
446 with xmalloc; instead, they are pointers into debug_line_buffer.
447 Don't try to free them directly. */
448 unsigned int num_file_names
, file_names_size
;
452 unsigned int dir_index
;
453 unsigned int mod_time
;
455 int included_p
; /* Non-zero if referenced by the Line Number Program. */
456 struct symtab
*symtab
; /* The associated symbol table, if any. */
459 /* The start and end of the statement program following this
460 header. These point into dwarf2_per_objfile->line_buffer. */
461 gdb_byte
*statement_program_start
, *statement_program_end
;
464 /* When we construct a partial symbol table entry we only
465 need this much information. */
466 struct partial_die_info
468 /* Offset of this DIE. */
471 /* DWARF-2 tag for this DIE. */
472 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
474 /* Assorted flags describing the data found in this DIE. */
475 unsigned int has_children
: 1;
476 unsigned int is_external
: 1;
477 unsigned int is_declaration
: 1;
478 unsigned int has_type
: 1;
479 unsigned int has_specification
: 1;
480 unsigned int has_pc_info
: 1;
482 /* Flag set if the SCOPE field of this structure has been
484 unsigned int scope_set
: 1;
486 /* Flag set if the DIE has a byte_size attribute. */
487 unsigned int has_byte_size
: 1;
489 /* The name of this DIE. Normally the value of DW_AT_name, but
490 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
494 /* The scope to prepend to our children. This is generally
495 allocated on the comp_unit_obstack, so will disappear
496 when this compilation unit leaves the cache. */
499 /* The location description associated with this DIE, if any. */
500 struct dwarf_block
*locdesc
;
502 /* If HAS_PC_INFO, the PC range associated with this DIE. */
506 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
507 DW_AT_sibling, if any. */
510 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
511 DW_AT_specification (or DW_AT_abstract_origin or
513 unsigned int spec_offset
;
515 /* Pointers to this DIE's parent, first child, and next sibling,
517 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
520 /* This data structure holds the information of an abbrev. */
523 unsigned int number
; /* number identifying abbrev */
524 enum dwarf_tag tag
; /* dwarf tag */
525 unsigned short has_children
; /* boolean */
526 unsigned short num_attrs
; /* number of attributes */
527 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
528 struct abbrev_info
*next
; /* next in chain */
533 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
534 ENUM_BITFIELD(dwarf_form
) form
: 16;
537 /* Attributes have a name and a value */
540 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
541 ENUM_BITFIELD(dwarf_form
) form
: 15;
543 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
544 field should be in u.str (existing only for DW_STRING) but it is kept
545 here for better struct attribute alignment. */
546 unsigned int string_is_canonical
: 1;
551 struct dwarf_block
*blk
;
555 struct signatured_type
*signatured_type
;
560 /* This data structure holds a complete die structure. */
563 /* DWARF-2 tag for this DIE. */
564 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
566 /* Number of attributes */
567 unsigned short num_attrs
;
572 /* Offset in .debug_info or .debug_types section. */
575 /* The dies in a compilation unit form an n-ary tree. PARENT
576 points to this die's parent; CHILD points to the first child of
577 this node; and all the children of a given node are chained
578 together via their SIBLING fields, terminated by a die whose
580 struct die_info
*child
; /* Its first child, if any. */
581 struct die_info
*sibling
; /* Its next sibling, if any. */
582 struct die_info
*parent
; /* Its parent, if any. */
584 /* An array of attributes, with NUM_ATTRS elements. There may be
585 zero, but it's not common and zero-sized arrays are not
586 sufficiently portable C. */
587 struct attribute attrs
[1];
590 struct function_range
593 CORE_ADDR lowpc
, highpc
;
595 struct function_range
*next
;
598 /* Get at parts of an attribute structure */
600 #define DW_STRING(attr) ((attr)->u.str)
601 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
602 #define DW_UNSND(attr) ((attr)->u.unsnd)
603 #define DW_BLOCK(attr) ((attr)->u.blk)
604 #define DW_SND(attr) ((attr)->u.snd)
605 #define DW_ADDR(attr) ((attr)->u.addr)
606 #define DW_SIGNATURED_TYPE(attr) ((attr)->u.signatured_type)
608 /* Blocks are a bunch of untyped bytes. */
615 #ifndef ATTR_ALLOC_CHUNK
616 #define ATTR_ALLOC_CHUNK 4
619 /* Allocate fields for structs, unions and enums in this size. */
620 #ifndef DW_FIELD_ALLOC_CHUNK
621 #define DW_FIELD_ALLOC_CHUNK 4
624 /* A zeroed version of a partial die for initialization purposes. */
625 static struct partial_die_info zeroed_partial_die
;
627 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
628 but this would require a corresponding change in unpack_field_as_long
630 static int bits_per_byte
= 8;
632 /* The routines that read and process dies for a C struct or C++ class
633 pass lists of data member fields and lists of member function fields
634 in an instance of a field_info structure, as defined below. */
637 /* List of data member and baseclasses fields. */
640 struct nextfield
*next
;
645 *fields
, *baseclasses
;
647 /* Number of fields (including baseclasses). */
650 /* Number of baseclasses. */
653 /* Set if the accesibility of one of the fields is not public. */
654 int non_public_fields
;
656 /* Member function fields array, entries are allocated in the order they
657 are encountered in the object file. */
660 struct nextfnfield
*next
;
661 struct fn_field fnfield
;
665 /* Member function fieldlist array, contains name of possibly overloaded
666 member function, number of overloaded member functions and a pointer
667 to the head of the member function field chain. */
672 struct nextfnfield
*head
;
676 /* Number of entries in the fnfieldlists array. */
680 /* One item on the queue of compilation units to read in full symbols
682 struct dwarf2_queue_item
684 struct dwarf2_per_cu_data
*per_cu
;
685 struct dwarf2_queue_item
*next
;
688 /* The current queue. */
689 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
691 /* Loaded secondary compilation units are kept in memory until they
692 have not been referenced for the processing of this many
693 compilation units. Set this to zero to disable caching. Cache
694 sizes of up to at least twenty will improve startup time for
695 typical inter-CU-reference binaries, at an obvious memory cost. */
696 static int dwarf2_max_cache_age
= 5;
698 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
699 struct cmd_list_element
*c
, const char *value
)
701 fprintf_filtered (file
, _("\
702 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
707 /* Various complaints about symbol reading that don't abort the process */
710 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
712 complaint (&symfile_complaints
,
713 _("statement list doesn't fit in .debug_line section"));
717 dwarf2_debug_line_missing_file_complaint (void)
719 complaint (&symfile_complaints
,
720 _(".debug_line section has line data without a file"));
724 dwarf2_debug_line_missing_end_sequence_complaint (void)
726 complaint (&symfile_complaints
,
727 _(".debug_line section has line program sequence without an end"));
731 dwarf2_complex_location_expr_complaint (void)
733 complaint (&symfile_complaints
, _("location expression too complex"));
737 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
740 complaint (&symfile_complaints
,
741 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
746 dwarf2_macros_too_long_complaint (void)
748 complaint (&symfile_complaints
,
749 _("macro info runs off end of `.debug_macinfo' section"));
753 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
755 complaint (&symfile_complaints
,
756 _("macro debug info contains a malformed macro definition:\n`%s'"),
761 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
763 complaint (&symfile_complaints
,
764 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
767 /* local function prototypes */
769 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
772 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
775 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
778 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
780 struct partial_symtab
*);
782 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
784 static void scan_partial_symbols (struct partial_die_info
*,
785 CORE_ADDR
*, CORE_ADDR
*,
786 int, struct dwarf2_cu
*);
788 static void add_partial_symbol (struct partial_die_info
*,
791 static int pdi_needs_namespace (enum dwarf_tag tag
);
793 static void add_partial_namespace (struct partial_die_info
*pdi
,
794 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
795 int need_pc
, struct dwarf2_cu
*cu
);
797 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
798 CORE_ADDR
*highpc
, int need_pc
,
799 struct dwarf2_cu
*cu
);
801 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
802 struct dwarf2_cu
*cu
);
804 static void add_partial_subprogram (struct partial_die_info
*pdi
,
805 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
806 int need_pc
, struct dwarf2_cu
*cu
);
808 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
809 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
810 bfd
*abfd
, struct dwarf2_cu
*cu
);
812 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
814 static void psymtab_to_symtab_1 (struct partial_symtab
*);
816 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
818 static void dwarf2_free_abbrev_table (void *);
820 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
823 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
826 static struct partial_die_info
*load_partial_dies (bfd
*,
827 gdb_byte
*, gdb_byte
*,
828 int, struct dwarf2_cu
*);
830 static gdb_byte
*read_partial_die (struct partial_die_info
*,
831 struct abbrev_info
*abbrev
,
833 gdb_byte
*, gdb_byte
*,
836 static struct partial_die_info
*find_partial_die (unsigned int,
839 static void fixup_partial_die (struct partial_die_info
*,
842 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
843 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
845 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
846 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
848 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
850 static int read_1_signed_byte (bfd
*, gdb_byte
*);
852 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
854 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
856 static ULONGEST
read_8_bytes (bfd
*, gdb_byte
*);
858 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
861 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
863 static LONGEST read_checked_initial_length_and_offset
864 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
865 unsigned int *, unsigned int *);
867 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
870 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
872 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
874 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
876 static char *read_indirect_string (bfd
*, gdb_byte
*,
877 const struct comp_unit_head
*,
880 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
882 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
884 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
886 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
888 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
891 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
895 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
896 struct dwarf2_cu
*cu
);
898 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
900 static struct die_info
*die_specification (struct die_info
*die
,
901 struct dwarf2_cu
**);
903 static void free_line_header (struct line_header
*lh
);
905 static void add_file_name (struct line_header
*, char *, unsigned int,
906 unsigned int, unsigned int);
908 static struct line_header
*(dwarf_decode_line_header
909 (unsigned int offset
,
910 bfd
*abfd
, struct dwarf2_cu
*cu
));
912 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
913 struct dwarf2_cu
*, struct partial_symtab
*);
915 static void dwarf2_start_subfile (char *, char *, char *);
917 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
920 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
923 static void dwarf2_const_value_data (struct attribute
*attr
,
927 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
929 static struct type
*die_containing_type (struct die_info
*,
932 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
934 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
936 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
938 static char *typename_concat (struct obstack
*,
943 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
945 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
947 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
949 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
951 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
952 struct dwarf2_cu
*, struct partial_symtab
*);
954 static int dwarf2_get_pc_bounds (struct die_info
*,
955 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*,
956 struct partial_symtab
*);
958 static void get_scope_pc_bounds (struct die_info
*,
959 CORE_ADDR
*, CORE_ADDR
*,
962 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
963 CORE_ADDR
, struct dwarf2_cu
*);
965 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
968 static void dwarf2_attach_fields_to_type (struct field_info
*,
969 struct type
*, struct dwarf2_cu
*);
971 static void dwarf2_add_member_fn (struct field_info
*,
972 struct die_info
*, struct type
*,
975 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
976 struct type
*, struct dwarf2_cu
*);
978 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
980 static const char *determine_class_name (struct die_info
*die
,
981 struct dwarf2_cu
*cu
);
983 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
985 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
987 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
989 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
991 static const char *namespace_name (struct die_info
*die
,
992 int *is_anonymous
, struct dwarf2_cu
*);
994 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
996 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
998 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1001 static struct die_info
*read_comp_unit (gdb_byte
*, struct dwarf2_cu
*);
1003 static struct die_info
*read_die_and_children_1 (const struct die_reader_specs
*reader
,
1005 gdb_byte
**new_info_ptr
,
1006 struct die_info
*parent
);
1008 static struct die_info
*read_die_and_children (const struct die_reader_specs
*reader
,
1010 gdb_byte
**new_info_ptr
,
1011 struct die_info
*parent
);
1013 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*reader
,
1015 gdb_byte
**new_info_ptr
,
1016 struct die_info
*parent
);
1018 static gdb_byte
*read_full_die (const struct die_reader_specs
*reader
,
1019 struct die_info
**, gdb_byte
*,
1022 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1024 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
1026 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
1029 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1031 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1032 struct dwarf2_cu
**);
1034 static char *dwarf_tag_name (unsigned int);
1036 static char *dwarf_attr_name (unsigned int);
1038 static char *dwarf_form_name (unsigned int);
1040 static char *dwarf_stack_op_name (unsigned int);
1042 static char *dwarf_bool_name (unsigned int);
1044 static char *dwarf_type_encoding_name (unsigned int);
1047 static char *dwarf_cfi_name (unsigned int);
1050 static struct die_info
*sibling_die (struct die_info
*);
1052 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1054 static void dump_die_for_error (struct die_info
*);
1056 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1059 /*static*/ void dump_die (struct die_info
*, int max_level
);
1061 static void store_in_ref_table (struct die_info
*,
1062 struct dwarf2_cu
*);
1064 static int is_ref_attr (struct attribute
*);
1066 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1068 static int dwarf2_get_attr_constant_value (struct attribute
*, int);
1070 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1072 struct dwarf2_cu
**);
1074 static struct die_info
*follow_die_ref (struct die_info
*,
1076 struct dwarf2_cu
**);
1078 static struct die_info
*follow_die_sig (struct die_info
*,
1080 struct dwarf2_cu
**);
1082 static void read_signatured_type_at_offset (struct objfile
*objfile
,
1083 unsigned int offset
);
1085 static void read_signatured_type (struct objfile
*,
1086 struct signatured_type
*type_sig
);
1088 /* memory allocation interface */
1090 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1092 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1094 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1096 static void initialize_cu_func_list (struct dwarf2_cu
*);
1098 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1099 struct dwarf2_cu
*);
1101 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1102 char *, bfd
*, struct dwarf2_cu
*);
1104 static int attr_form_is_block (struct attribute
*);
1106 static int attr_form_is_section_offset (struct attribute
*);
1108 static int attr_form_is_constant (struct attribute
*);
1110 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1112 struct dwarf2_cu
*cu
);
1114 static gdb_byte
*skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1115 struct abbrev_info
*abbrev
,
1116 struct dwarf2_cu
*cu
);
1118 static void free_stack_comp_unit (void *);
1120 static hashval_t
partial_die_hash (const void *item
);
1122 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1124 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1125 (unsigned int offset
, struct objfile
*objfile
);
1127 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1128 (unsigned int offset
, struct objfile
*objfile
);
1130 static struct dwarf2_cu
*alloc_one_comp_unit (struct objfile
*objfile
);
1132 static void free_one_comp_unit (void *);
1134 static void free_cached_comp_units (void *);
1136 static void age_cached_comp_units (void);
1138 static void free_one_cached_comp_unit (void *);
1140 static struct type
*set_die_type (struct die_info
*, struct type
*,
1141 struct dwarf2_cu
*);
1143 static void create_all_comp_units (struct objfile
*);
1145 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1148 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1150 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1151 struct dwarf2_per_cu_data
*);
1153 static void dwarf2_mark (struct dwarf2_cu
*);
1155 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1157 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1159 /* Try to locate the sections we need for DWARF 2 debugging
1160 information and return true if we have enough to do something. */
1163 dwarf2_has_info (struct objfile
*objfile
)
1165 struct dwarf2_per_objfile
*data
;
1167 /* Initialize per-objfile state. */
1168 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1169 memset (data
, 0, sizeof (*data
));
1170 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1171 dwarf2_per_objfile
= data
;
1173 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1174 return (data
->info
.asection
!= NULL
&& data
->abbrev
.asection
!= NULL
);
1177 /* When loading sections, we can either look for ".<name>", or for
1178 * ".z<name>", which indicates a compressed section. */
1181 section_is_p (const char *section_name
, const char *name
)
1183 return (section_name
[0] == '.'
1184 && (strcmp (section_name
+ 1, name
) == 0
1185 || (section_name
[1] == 'z'
1186 && strcmp (section_name
+ 2, name
) == 0)));
1189 /* This function is mapped across the sections and remembers the
1190 offset and size of each of the debugging sections we are interested
1194 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1196 if (section_is_p (sectp
->name
, INFO_SECTION
))
1198 dwarf2_per_objfile
->info
.asection
= sectp
;
1199 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1201 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1203 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1204 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1206 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1208 dwarf2_per_objfile
->line
.asection
= sectp
;
1209 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1211 else if (section_is_p (sectp
->name
, PUBNAMES_SECTION
))
1213 dwarf2_per_objfile
->pubnames
.asection
= sectp
;
1214 dwarf2_per_objfile
->pubnames
.size
= bfd_get_section_size (sectp
);
1216 else if (section_is_p (sectp
->name
, ARANGES_SECTION
))
1218 dwarf2_per_objfile
->aranges
.asection
= sectp
;
1219 dwarf2_per_objfile
->aranges
.size
= bfd_get_section_size (sectp
);
1221 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1223 dwarf2_per_objfile
->loc
.asection
= sectp
;
1224 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1226 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1228 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1229 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1231 else if (section_is_p (sectp
->name
, STR_SECTION
))
1233 dwarf2_per_objfile
->str
.asection
= sectp
;
1234 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1236 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1238 dwarf2_per_objfile
->frame
.asection
= sectp
;
1239 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1241 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1243 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1244 if (aflag
& SEC_HAS_CONTENTS
)
1246 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1247 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1250 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1252 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1253 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1255 else if (section_is_p (sectp
->name
, TYPES_SECTION
))
1257 dwarf2_per_objfile
->types
.asection
= sectp
;
1258 dwarf2_per_objfile
->types
.size
= bfd_get_section_size (sectp
);
1261 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1262 && bfd_section_vma (abfd
, sectp
) == 0)
1263 dwarf2_per_objfile
->has_section_at_zero
= 1;
1266 /* Decompress a section that was compressed using zlib. Store the
1267 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1270 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1271 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1273 bfd
*abfd
= objfile
->obfd
;
1275 error (_("Support for zlib-compressed DWARF data (from '%s') "
1276 "is disabled in this copy of GDB"),
1277 bfd_get_filename (abfd
));
1279 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1280 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1281 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1282 bfd_size_type uncompressed_size
;
1283 gdb_byte
*uncompressed_buffer
;
1286 int header_size
= 12;
1288 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1289 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1290 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1291 bfd_get_filename (abfd
));
1293 /* Read the zlib header. In this case, it should be "ZLIB" followed
1294 by the uncompressed section size, 8 bytes in big-endian order. */
1295 if (compressed_size
< header_size
1296 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1297 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1298 bfd_get_filename (abfd
));
1299 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1300 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1301 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1302 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1303 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1304 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1305 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1306 uncompressed_size
+= compressed_buffer
[11];
1308 /* It is possible the section consists of several compressed
1309 buffers concatenated together, so we uncompress in a loop. */
1313 strm
.avail_in
= compressed_size
- header_size
;
1314 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1315 strm
.avail_out
= uncompressed_size
;
1316 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1318 rc
= inflateInit (&strm
);
1319 while (strm
.avail_in
> 0)
1322 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1323 bfd_get_filename (abfd
), rc
);
1324 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1325 + (uncompressed_size
- strm
.avail_out
));
1326 rc
= inflate (&strm
, Z_FINISH
);
1327 if (rc
!= Z_STREAM_END
)
1328 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1329 bfd_get_filename (abfd
), rc
);
1330 rc
= inflateReset (&strm
);
1332 rc
= inflateEnd (&strm
);
1334 || strm
.avail_out
!= 0)
1335 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1336 bfd_get_filename (abfd
), rc
);
1338 do_cleanups (cleanup
);
1339 *outbuf
= uncompressed_buffer
;
1340 *outsize
= uncompressed_size
;
1344 /* Read the contents of the section SECTP from object file specified by
1345 OBJFILE, store info about the section into INFO.
1346 If the section is compressed, uncompress it before returning. */
1349 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1351 bfd
*abfd
= objfile
->obfd
;
1352 asection
*sectp
= info
->asection
;
1353 gdb_byte
*buf
, *retbuf
;
1354 unsigned char header
[4];
1356 info
->buffer
= NULL
;
1357 info
->was_mmapped
= 0;
1359 if (info
->asection
== NULL
|| info
->size
== 0)
1362 /* Check if the file has a 4-byte header indicating compression. */
1363 if (info
->size
> sizeof (header
)
1364 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1365 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1367 /* Upon decompression, update the buffer and its size. */
1368 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1370 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1378 pagesize
= getpagesize ();
1380 /* Only try to mmap sections which are large enough: we don't want to
1381 waste space due to fragmentation. Also, only try mmap for sections
1382 without relocations. */
1384 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1386 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1387 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1388 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1389 MAP_PRIVATE
, pg_offset
);
1391 if (retbuf
!= MAP_FAILED
)
1393 info
->was_mmapped
= 1;
1394 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1400 /* If we get here, we are a normal, not-compressed section. */
1402 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1404 /* When debugging .o files, we may need to apply relocations; see
1405 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1406 We never compress sections in .o files, so we only need to
1407 try this when the section is not compressed. */
1408 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
1411 info
->buffer
= retbuf
;
1415 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1416 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1417 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1418 bfd_get_filename (abfd
));
1421 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1425 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1426 asection
**sectp
, gdb_byte
**bufp
,
1427 bfd_size_type
*sizep
)
1429 struct dwarf2_per_objfile
*data
1430 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1431 struct dwarf2_section_info
*info
;
1432 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1433 info
= &data
->eh_frame
;
1434 else if (section_is_p (section_name
, FRAME_SECTION
))
1435 info
= &data
->frame
;
1439 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1440 /* We haven't read this section in yet. Do it now. */
1441 dwarf2_read_section (objfile
, info
);
1443 *sectp
= info
->asection
;
1444 *bufp
= info
->buffer
;
1445 *sizep
= info
->size
;
1448 /* Build a partial symbol table. */
1451 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1453 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
1454 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->abbrev
);
1455 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->line
);
1456 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->str
);
1457 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->macinfo
);
1458 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
1459 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->types
);
1460 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->loc
);
1461 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->eh_frame
);
1462 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->frame
);
1465 || (objfile
->global_psymbols
.size
== 0
1466 && objfile
->static_psymbols
.size
== 0))
1468 init_psymbol_list (objfile
, 1024);
1472 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1474 /* Things are significantly easier if we have .debug_aranges and
1475 .debug_pubnames sections */
1477 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1481 /* only test this case for now */
1483 /* In this case we have to work a bit harder */
1484 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1489 /* Build the partial symbol table from the information in the
1490 .debug_pubnames and .debug_aranges sections. */
1493 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1495 bfd
*abfd
= objfile
->obfd
;
1496 char *aranges_buffer
, *pubnames_buffer
;
1497 char *aranges_ptr
, *pubnames_ptr
;
1498 unsigned int entry_length
, version
, info_offset
, info_size
;
1500 pubnames_buffer
= dwarf2_read_section (objfile
,
1501 dwarf_pubnames_section
);
1502 pubnames_ptr
= pubnames_buffer
;
1503 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames
.size
)
1505 unsigned int bytes_read
;
1507 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &bytes_read
);
1508 pubnames_ptr
+= bytes_read
;
1509 version
= read_1_byte (abfd
, pubnames_ptr
);
1511 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1513 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1517 aranges_buffer
= dwarf2_read_section (objfile
,
1518 dwarf_aranges_section
);
1523 /* Return TRUE if OFFSET is within CU_HEADER. */
1526 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1528 unsigned int bottom
= cu_header
->offset
;
1529 unsigned int top
= (cu_header
->offset
1531 + cu_header
->initial_length_size
);
1532 return (offset
>= bottom
&& offset
< top
);
1535 /* Read in the comp unit header information from the debug_info at info_ptr.
1536 NOTE: This leaves members offset, first_die_offset to be filled in
1540 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1541 gdb_byte
*info_ptr
, bfd
*abfd
)
1544 unsigned int bytes_read
;
1546 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1547 cu_header
->initial_length_size
= bytes_read
;
1548 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1549 info_ptr
+= bytes_read
;
1550 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1552 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1554 info_ptr
+= bytes_read
;
1555 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1557 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1558 if (signed_addr
< 0)
1559 internal_error (__FILE__
, __LINE__
,
1560 _("read_comp_unit_head: dwarf from non elf file"));
1561 cu_header
->signed_addr_p
= signed_addr
;
1567 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1568 gdb_byte
*buffer
, unsigned int buffer_size
,
1571 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1573 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1575 if (header
->version
!= 2 && header
->version
!= 3)
1576 error (_("Dwarf Error: wrong version in compilation unit header "
1577 "(is %d, should be %d) [in module %s]"), header
->version
,
1578 2, bfd_get_filename (abfd
));
1580 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1581 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1582 "(offset 0x%lx + 6) [in module %s]"),
1583 (long) header
->abbrev_offset
,
1584 (long) (beg_of_comp_unit
- buffer
),
1585 bfd_get_filename (abfd
));
1587 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1588 > buffer
+ buffer_size
)
1589 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1590 "(offset 0x%lx + 0) [in module %s]"),
1591 (long) header
->length
,
1592 (long) (beg_of_comp_unit
- buffer
),
1593 bfd_get_filename (abfd
));
1598 /* Read in the types comp unit header information from .debug_types entry at
1599 types_ptr. The result is a pointer to one past the end of the header. */
1602 read_type_comp_unit_head (struct comp_unit_head
*cu_header
,
1603 ULONGEST
*signature
,
1604 gdb_byte
*types_ptr
, bfd
*abfd
)
1606 unsigned int bytes_read
;
1607 gdb_byte
*initial_types_ptr
= types_ptr
;
1609 cu_header
->offset
= types_ptr
- dwarf2_per_objfile
->types
.buffer
;
1611 types_ptr
= read_comp_unit_head (cu_header
, types_ptr
, abfd
);
1613 *signature
= read_8_bytes (abfd
, types_ptr
);
1615 types_ptr
+= cu_header
->offset_size
;
1616 cu_header
->first_die_offset
= types_ptr
- initial_types_ptr
;
1621 /* Allocate a new partial symtab for file named NAME and mark this new
1622 partial symtab as being an include of PST. */
1625 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1626 struct objfile
*objfile
)
1628 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1630 subpst
->section_offsets
= pst
->section_offsets
;
1631 subpst
->textlow
= 0;
1632 subpst
->texthigh
= 0;
1634 subpst
->dependencies
= (struct partial_symtab
**)
1635 obstack_alloc (&objfile
->objfile_obstack
,
1636 sizeof (struct partial_symtab
*));
1637 subpst
->dependencies
[0] = pst
;
1638 subpst
->number_of_dependencies
= 1;
1640 subpst
->globals_offset
= 0;
1641 subpst
->n_global_syms
= 0;
1642 subpst
->statics_offset
= 0;
1643 subpst
->n_static_syms
= 0;
1644 subpst
->symtab
= NULL
;
1645 subpst
->read_symtab
= pst
->read_symtab
;
1648 /* No private part is necessary for include psymtabs. This property
1649 can be used to differentiate between such include psymtabs and
1650 the regular ones. */
1651 subpst
->read_symtab_private
= NULL
;
1654 /* Read the Line Number Program data and extract the list of files
1655 included by the source file represented by PST. Build an include
1656 partial symtab for each of these included files. */
1659 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1660 struct die_info
*die
,
1661 struct partial_symtab
*pst
)
1663 struct objfile
*objfile
= cu
->objfile
;
1664 bfd
*abfd
= objfile
->obfd
;
1665 struct line_header
*lh
= NULL
;
1666 struct attribute
*attr
;
1668 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
1671 unsigned int line_offset
= DW_UNSND (attr
);
1672 lh
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
1675 return; /* No linetable, so no includes. */
1677 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1679 free_line_header (lh
);
1683 hash_type_signature (const void *item
)
1685 const struct signatured_type
*type_sig
= item
;
1686 /* This drops the top 32 bits of the signature, but is ok for a hash. */
1687 return type_sig
->signature
;
1691 eq_type_signature (const void *item_lhs
, const void *item_rhs
)
1693 const struct signatured_type
*lhs
= item_lhs
;
1694 const struct signatured_type
*rhs
= item_rhs
;
1695 return lhs
->signature
== rhs
->signature
;
1698 /* Create the hash table of all entries in the .debug_types section.
1699 The result is zero if there is an error (e.g. missing .debug_types section),
1700 otherwise non-zero. */
1703 create_debug_types_hash_table (struct objfile
*objfile
)
1705 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
;
1708 if (info_ptr
== NULL
)
1710 dwarf2_per_objfile
->signatured_types
= NULL
;
1714 types_htab
= htab_create_alloc_ex (41,
1715 hash_type_signature
,
1718 &objfile
->objfile_obstack
,
1719 hashtab_obstack_allocate
,
1720 dummy_obstack_deallocate
);
1722 if (dwarf2_die_debug
)
1723 fprintf_unfiltered (gdb_stdlog
, "Signatured types:\n");
1725 while (info_ptr
< dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1727 unsigned int offset
;
1728 unsigned int offset_size
;
1729 unsigned int type_offset
;
1730 unsigned int length
, initial_length_size
;
1731 unsigned short version
;
1733 struct signatured_type
*type_sig
;
1735 gdb_byte
*ptr
= info_ptr
;
1737 offset
= ptr
- dwarf2_per_objfile
->types
.buffer
;
1739 /* We need to read the type's signature in order to build the hash
1740 table, but we don't need to read anything else just yet. */
1742 /* Sanity check to ensure entire cu is present. */
1743 length
= read_initial_length (objfile
->obfd
, ptr
, &initial_length_size
);
1744 if (ptr
+ length
+ initial_length_size
1745 > dwarf2_per_objfile
->types
.buffer
+ dwarf2_per_objfile
->types
.size
)
1747 complaint (&symfile_complaints
,
1748 _("debug type entry runs off end of `.debug_types' section, ignored"));
1752 offset_size
= initial_length_size
== 4 ? 4 : 8;
1753 ptr
+= initial_length_size
;
1754 version
= bfd_get_16 (objfile
->obfd
, ptr
);
1756 ptr
+= offset_size
; /* abbrev offset */
1757 ptr
+= 1; /* address size */
1758 signature
= bfd_get_64 (objfile
->obfd
, ptr
);
1760 type_offset
= read_offset_1 (objfile
->obfd
, ptr
, offset_size
);
1762 type_sig
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*type_sig
));
1763 memset (type_sig
, 0, sizeof (*type_sig
));
1764 type_sig
->signature
= signature
;
1765 type_sig
->offset
= offset
;
1766 type_sig
->type_offset
= type_offset
;
1768 slot
= htab_find_slot (types_htab
, type_sig
, INSERT
);
1769 gdb_assert (slot
!= NULL
);
1772 if (dwarf2_die_debug
)
1773 fprintf_unfiltered (gdb_stdlog
, " offset 0x%x, signature 0x%s\n",
1774 offset
, phex (signature
, sizeof (signature
)));
1776 info_ptr
= info_ptr
+ initial_length_size
+ length
;
1779 dwarf2_per_objfile
->signatured_types
= types_htab
;
1784 /* Lookup a signature based type.
1785 Returns NULL if SIG is not present in the table. */
1787 static struct signatured_type
*
1788 lookup_signatured_type (struct objfile
*objfile
, ULONGEST sig
)
1790 struct signatured_type find_entry
, *entry
;
1792 if (dwarf2_per_objfile
->signatured_types
== NULL
)
1794 complaint (&symfile_complaints
,
1795 _("missing `.debug_types' section for DW_FORM_sig8 die"));
1799 find_entry
.signature
= sig
;
1800 entry
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
1804 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
1807 init_cu_die_reader (struct die_reader_specs
*reader
,
1808 struct dwarf2_cu
*cu
)
1810 reader
->abfd
= cu
->objfile
->obfd
;
1812 if (cu
->per_cu
->from_debug_types
)
1813 reader
->buffer
= dwarf2_per_objfile
->types
.buffer
;
1815 reader
->buffer
= dwarf2_per_objfile
->info
.buffer
;
1818 /* Find the base address of the compilation unit for range lists and
1819 location lists. It will normally be specified by DW_AT_low_pc.
1820 In DWARF-3 draft 4, the base address could be overridden by
1821 DW_AT_entry_pc. It's been removed, but GCC still uses this for
1822 compilation units with discontinuous ranges. */
1825 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
1827 struct attribute
*attr
;
1830 cu
->base_address
= 0;
1832 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
1835 cu
->base_address
= DW_ADDR (attr
);
1840 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
1843 cu
->base_address
= DW_ADDR (attr
);
1849 /* Subroutine of process_type_comp_unit and dwarf2_build_psymtabs_hard
1850 to combine the common parts.
1851 Process a compilation unit for a psymtab.
1852 BUFFER is a pointer to the beginning of the dwarf section buffer,
1853 either .debug_info or debug_types.
1854 INFO_PTR is a pointer to the start of the CU.
1855 Returns a pointer to the next CU. */
1858 process_psymtab_comp_unit (struct objfile
*objfile
,
1859 struct dwarf2_per_cu_data
*this_cu
,
1860 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
1861 unsigned int buffer_size
)
1863 bfd
*abfd
= objfile
->obfd
;
1864 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1865 struct die_info
*comp_unit_die
;
1866 struct partial_symtab
*pst
;
1868 struct cleanup
*back_to_inner
;
1869 struct dwarf2_cu cu
;
1870 unsigned int bytes_read
;
1871 int has_children
, has_pc_info
;
1872 struct attribute
*attr
;
1874 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
1875 struct die_reader_specs reader_specs
;
1877 memset (&cu
, 0, sizeof (cu
));
1878 cu
.objfile
= objfile
;
1879 obstack_init (&cu
.comp_unit_obstack
);
1881 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1883 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
,
1884 buffer
, buffer_size
,
1887 /* Complete the cu_header. */
1888 cu
.header
.offset
= beg_of_comp_unit
- buffer
;
1889 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1891 cu
.list_in_scope
= &file_symbols
;
1893 /* If this compilation unit was already read in, free the
1894 cached copy in order to read it in again. This is
1895 necessary because we skipped some symbols when we first
1896 read in the compilation unit (see load_partial_dies).
1897 This problem could be avoided, but the benefit is
1899 if (this_cu
->cu
!= NULL
)
1900 free_one_cached_comp_unit (this_cu
->cu
);
1902 /* Note that this is a pointer to our stack frame, being
1903 added to a global data structure. It will be cleaned up
1904 in free_stack_comp_unit when we finish with this
1905 compilation unit. */
1907 cu
.per_cu
= this_cu
;
1909 /* Read the abbrevs for this compilation unit into a table. */
1910 dwarf2_read_abbrevs (abfd
, &cu
);
1911 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1913 /* Read the compilation unit die. */
1914 if (this_cu
->from_debug_types
)
1915 info_ptr
+= 8 /*signature*/ + cu
.header
.offset_size
;
1916 init_cu_die_reader (&reader_specs
, &cu
);
1917 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
1920 if (this_cu
->from_debug_types
)
1922 /* offset,length haven't been set yet for type units. */
1923 this_cu
->offset
= cu
.header
.offset
;
1924 this_cu
->length
= cu
.header
.length
+ cu
.header
.initial_length_size
;
1926 else if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
1928 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1929 + cu
.header
.initial_length_size
);
1930 do_cleanups (back_to_inner
);
1934 /* Set the language we're debugging. */
1935 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, &cu
);
1937 set_cu_language (DW_UNSND (attr
), &cu
);
1939 set_cu_language (language_minimal
, &cu
);
1941 /* Allocate a new partial symbol table structure. */
1942 attr
= dwarf2_attr (comp_unit_die
, DW_AT_name
, &cu
);
1943 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1944 (attr
!= NULL
) ? DW_STRING (attr
) : "",
1945 /* TEXTLOW and TEXTHIGH are set below. */
1947 objfile
->global_psymbols
.next
,
1948 objfile
->static_psymbols
.next
);
1950 attr
= dwarf2_attr (comp_unit_die
, DW_AT_comp_dir
, &cu
);
1952 pst
->dirname
= DW_STRING (attr
);
1954 pst
->read_symtab_private
= (char *) this_cu
;
1956 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1958 /* Store the function that reads in the rest of the symbol table */
1959 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1961 this_cu
->psymtab
= pst
;
1963 dwarf2_find_base_address (comp_unit_die
, &cu
);
1965 /* Possibly set the default values of LOWPC and HIGHPC from
1967 has_pc_info
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
1968 &best_highpc
, &cu
, pst
);
1969 if (has_pc_info
== 1 && best_lowpc
< best_highpc
)
1970 /* Store the contiguous range if it is not empty; it can be empty for
1971 CUs with no code. */
1972 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1973 best_lowpc
+ baseaddr
,
1974 best_highpc
+ baseaddr
- 1, pst
);
1976 /* Check if comp unit has_children.
1977 If so, read the rest of the partial symbols from this comp unit.
1978 If not, there's no more debug_info for this comp unit. */
1981 struct partial_die_info
*first_die
;
1982 CORE_ADDR lowpc
, highpc
;
1984 lowpc
= ((CORE_ADDR
) -1);
1985 highpc
= ((CORE_ADDR
) 0);
1987 first_die
= load_partial_dies (abfd
, buffer
, info_ptr
, 1, &cu
);
1989 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1990 ! has_pc_info
, &cu
);
1992 /* If we didn't find a lowpc, set it to highpc to avoid
1993 complaints from `maint check'. */
1994 if (lowpc
== ((CORE_ADDR
) -1))
1997 /* If the compilation unit didn't have an explicit address range,
1998 then use the information extracted from its child dies. */
2002 best_highpc
= highpc
;
2005 pst
->textlow
= best_lowpc
+ baseaddr
;
2006 pst
->texthigh
= best_highpc
+ baseaddr
;
2008 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
2009 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2010 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
2011 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2012 sort_pst_symbols (pst
);
2014 /* If there is already a psymtab or symtab for a file of this
2015 name, remove it. (If there is a symtab, more drastic things
2016 also happen.) This happens in VxWorks. */
2017 if (! this_cu
->from_debug_types
)
2018 free_named_symtabs (pst
->filename
);
2020 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
2021 + cu
.header
.initial_length_size
);
2023 if (this_cu
->from_debug_types
)
2025 /* It's not clear we want to do anything with stmt lists here.
2026 Waiting to see what gcc ultimately does. */
2030 /* Get the list of files included in the current compilation unit,
2031 and build a psymtab for each of them. */
2032 dwarf2_build_include_psymtabs (&cu
, comp_unit_die
, pst
);
2035 do_cleanups (back_to_inner
);
2040 /* Traversal function for htab_traverse_noresize.
2041 Process one .debug_types comp-unit. */
2044 process_type_comp_unit (void **slot
, void *info
)
2046 struct signatured_type
*entry
= (struct signatured_type
*) *slot
;
2047 struct objfile
*objfile
= (struct objfile
*) info
;
2048 struct dwarf2_per_cu_data
*this_cu
;
2050 this_cu
= &entry
->per_cu
;
2051 this_cu
->from_debug_types
= 1;
2053 process_psymtab_comp_unit (objfile
, this_cu
,
2054 dwarf2_per_objfile
->types
.buffer
,
2055 dwarf2_per_objfile
->types
.buffer
+ entry
->offset
,
2056 dwarf2_per_objfile
->types
.size
);
2061 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
2062 Build partial symbol tables for the .debug_types comp-units. */
2065 build_type_psymtabs (struct objfile
*objfile
)
2067 if (! create_debug_types_hash_table (objfile
))
2070 htab_traverse_noresize (dwarf2_per_objfile
->signatured_types
,
2071 process_type_comp_unit
, objfile
);
2074 /* Build the partial symbol table by doing a quick pass through the
2075 .debug_info and .debug_abbrev sections. */
2078 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
2080 /* Instead of reading this into a big buffer, we should probably use
2081 mmap() on architectures that support it. (FIXME) */
2082 bfd
*abfd
= objfile
->obfd
;
2084 struct cleanup
*back_to
;
2086 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2088 /* Any cached compilation units will be linked by the per-objfile
2089 read_in_chain. Make sure to free them when we're done. */
2090 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
2092 build_type_psymtabs (objfile
);
2094 create_all_comp_units (objfile
);
2096 objfile
->psymtabs_addrmap
=
2097 addrmap_create_mutable (&objfile
->objfile_obstack
);
2099 /* Since the objects we're extracting from .debug_info vary in
2100 length, only the individual functions to extract them (like
2101 read_comp_unit_head and load_partial_die) can really know whether
2102 the buffer is large enough to hold another complete object.
2104 At the moment, they don't actually check that. If .debug_info
2105 holds just one extra byte after the last compilation unit's dies,
2106 then read_comp_unit_head will happily read off the end of the
2107 buffer. read_partial_die is similarly casual. Those functions
2110 For this loop condition, simply checking whether there's any data
2111 left at all should be sufficient. */
2113 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
2114 + dwarf2_per_objfile
->info
.size
))
2116 struct dwarf2_per_cu_data
*this_cu
;
2118 this_cu
= dwarf2_find_comp_unit (info_ptr
- dwarf2_per_objfile
->info
.buffer
,
2121 info_ptr
= process_psymtab_comp_unit (objfile
, this_cu
,
2122 dwarf2_per_objfile
->info
.buffer
,
2124 dwarf2_per_objfile
->info
.size
);
2127 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
2128 &objfile
->objfile_obstack
);
2130 do_cleanups (back_to
);
2133 /* Load the partial DIEs for a secondary CU into memory. */
2136 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
2137 struct objfile
*objfile
)
2139 bfd
*abfd
= objfile
->obfd
;
2140 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
2141 struct die_info
*comp_unit_die
;
2142 struct dwarf2_cu
*cu
;
2143 unsigned int bytes_read
;
2144 struct cleanup
*back_to
;
2145 struct attribute
*attr
;
2147 struct die_reader_specs reader_specs
;
2149 gdb_assert (! this_cu
->from_debug_types
);
2151 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
2152 beg_of_comp_unit
= info_ptr
;
2154 cu
= alloc_one_comp_unit (objfile
);
2156 /* ??? Missing cleanup for CU? */
2158 /* Link this compilation unit into the compilation unit tree. */
2160 cu
->per_cu
= this_cu
;
2161 cu
->type_hash
= this_cu
->type_hash
;
2163 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
,
2164 dwarf2_per_objfile
->info
.buffer
,
2165 dwarf2_per_objfile
->info
.size
,
2168 /* Complete the cu_header. */
2169 cu
->header
.offset
= this_cu
->offset
;
2170 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
2172 /* Read the abbrevs for this compilation unit into a table. */
2173 dwarf2_read_abbrevs (abfd
, cu
);
2174 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2176 /* Read the compilation unit die. */
2177 init_cu_die_reader (&reader_specs
, cu
);
2178 info_ptr
= read_full_die (&reader_specs
, &comp_unit_die
, info_ptr
,
2181 /* Set the language we're debugging. */
2182 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
2184 set_cu_language (DW_UNSND (attr
), cu
);
2186 set_cu_language (language_minimal
, cu
);
2188 /* Check if comp unit has_children.
2189 If so, read the rest of the partial symbols from this comp unit.
2190 If not, there's no more debug_info for this comp unit. */
2192 load_partial_dies (abfd
, dwarf2_per_objfile
->info
.buffer
, info_ptr
, 0, cu
);
2194 do_cleanups (back_to
);
2197 /* Create a list of all compilation units in OBJFILE. We do this only
2198 if an inter-comp-unit reference is found; presumably if there is one,
2199 there will be many, and one will occur early in the .debug_info section.
2200 So there's no point in building this list incrementally. */
2203 create_all_comp_units (struct objfile
*objfile
)
2207 struct dwarf2_per_cu_data
**all_comp_units
;
2208 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info
.buffer
;
2212 all_comp_units
= xmalloc (n_allocated
2213 * sizeof (struct dwarf2_per_cu_data
*));
2215 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
2217 unsigned int length
, initial_length_size
;
2218 gdb_byte
*beg_of_comp_unit
;
2219 struct dwarf2_per_cu_data
*this_cu
;
2220 unsigned int offset
;
2222 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
2224 /* Read just enough information to find out where the next
2225 compilation unit is. */
2226 length
= read_initial_length (objfile
->obfd
, info_ptr
,
2227 &initial_length_size
);
2229 /* Save the compilation unit for later lookup. */
2230 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
2231 sizeof (struct dwarf2_per_cu_data
));
2232 memset (this_cu
, 0, sizeof (*this_cu
));
2233 this_cu
->offset
= offset
;
2234 this_cu
->length
= length
+ initial_length_size
;
2236 if (n_comp_units
== n_allocated
)
2239 all_comp_units
= xrealloc (all_comp_units
,
2241 * sizeof (struct dwarf2_per_cu_data
*));
2243 all_comp_units
[n_comp_units
++] = this_cu
;
2245 info_ptr
= info_ptr
+ this_cu
->length
;
2248 dwarf2_per_objfile
->all_comp_units
2249 = obstack_alloc (&objfile
->objfile_obstack
,
2250 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2251 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
2252 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
2253 xfree (all_comp_units
);
2254 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
2257 /* Process all loaded DIEs for compilation unit CU, starting at
2258 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
2259 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
2260 DW_AT_ranges). If NEED_PC is set, then this function will set
2261 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
2262 and record the covered ranges in the addrmap. */
2265 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
2266 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2268 struct objfile
*objfile
= cu
->objfile
;
2269 bfd
*abfd
= objfile
->obfd
;
2270 struct partial_die_info
*pdi
;
2272 /* Now, march along the PDI's, descending into ones which have
2273 interesting children but skipping the children of the other ones,
2274 until we reach the end of the compilation unit. */
2280 fixup_partial_die (pdi
, cu
);
2282 /* Anonymous namespaces have no name but have interesting
2283 children, so we need to look at them. Ditto for anonymous
2286 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
2287 || pdi
->tag
== DW_TAG_enumeration_type
)
2291 case DW_TAG_subprogram
:
2292 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2294 case DW_TAG_variable
:
2295 case DW_TAG_typedef
:
2296 case DW_TAG_union_type
:
2297 if (!pdi
->is_declaration
)
2299 add_partial_symbol (pdi
, cu
);
2302 case DW_TAG_class_type
:
2303 case DW_TAG_interface_type
:
2304 case DW_TAG_structure_type
:
2305 if (!pdi
->is_declaration
)
2307 add_partial_symbol (pdi
, cu
);
2310 case DW_TAG_enumeration_type
:
2311 if (!pdi
->is_declaration
)
2312 add_partial_enumeration (pdi
, cu
);
2314 case DW_TAG_base_type
:
2315 case DW_TAG_subrange_type
:
2316 /* File scope base type definitions are added to the partial
2318 add_partial_symbol (pdi
, cu
);
2320 case DW_TAG_namespace
:
2321 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
2324 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
2331 /* If the die has a sibling, skip to the sibling. */
2333 pdi
= pdi
->die_sibling
;
2337 /* Functions used to compute the fully scoped name of a partial DIE.
2339 Normally, this is simple. For C++, the parent DIE's fully scoped
2340 name is concatenated with "::" and the partial DIE's name. For
2341 Java, the same thing occurs except that "." is used instead of "::".
2342 Enumerators are an exception; they use the scope of their parent
2343 enumeration type, i.e. the name of the enumeration type is not
2344 prepended to the enumerator.
2346 There are two complexities. One is DW_AT_specification; in this
2347 case "parent" means the parent of the target of the specification,
2348 instead of the direct parent of the DIE. The other is compilers
2349 which do not emit DW_TAG_namespace; in this case we try to guess
2350 the fully qualified name of structure types from their members'
2351 linkage names. This must be done using the DIE's children rather
2352 than the children of any DW_AT_specification target. We only need
2353 to do this for structures at the top level, i.e. if the target of
2354 any DW_AT_specification (if any; otherwise the DIE itself) does not
2357 /* Compute the scope prefix associated with PDI's parent, in
2358 compilation unit CU. The result will be allocated on CU's
2359 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2360 field. NULL is returned if no prefix is necessary. */
2362 partial_die_parent_scope (struct partial_die_info
*pdi
,
2363 struct dwarf2_cu
*cu
)
2365 char *grandparent_scope
;
2366 struct partial_die_info
*parent
, *real_pdi
;
2368 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2369 then this means the parent of the specification DIE. */
2372 while (real_pdi
->has_specification
)
2373 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2375 parent
= real_pdi
->die_parent
;
2379 if (parent
->scope_set
)
2380 return parent
->scope
;
2382 fixup_partial_die (parent
, cu
);
2384 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2386 if (parent
->tag
== DW_TAG_namespace
2387 || parent
->tag
== DW_TAG_structure_type
2388 || parent
->tag
== DW_TAG_class_type
2389 || parent
->tag
== DW_TAG_interface_type
2390 || parent
->tag
== DW_TAG_union_type
)
2392 if (grandparent_scope
== NULL
)
2393 parent
->scope
= parent
->name
;
2395 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2398 else if (parent
->tag
== DW_TAG_enumeration_type
)
2399 /* Enumerators should not get the name of the enumeration as a prefix. */
2400 parent
->scope
= grandparent_scope
;
2403 /* FIXME drow/2004-04-01: What should we be doing with
2404 function-local names? For partial symbols, we should probably be
2406 complaint (&symfile_complaints
,
2407 _("unhandled containing DIE tag %d for DIE at %d"),
2408 parent
->tag
, pdi
->offset
);
2409 parent
->scope
= grandparent_scope
;
2412 parent
->scope_set
= 1;
2413 return parent
->scope
;
2416 /* Return the fully scoped name associated with PDI, from compilation unit
2417 CU. The result will be allocated with malloc. */
2419 partial_die_full_name (struct partial_die_info
*pdi
,
2420 struct dwarf2_cu
*cu
)
2424 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2425 if (parent_scope
== NULL
)
2428 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
2432 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2434 struct objfile
*objfile
= cu
->objfile
;
2436 char *actual_name
= NULL
;
2437 const char *my_prefix
;
2438 const struct partial_symbol
*psym
= NULL
;
2440 int built_actual_name
= 0;
2442 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2444 if (pdi_needs_namespace (pdi
->tag
))
2446 actual_name
= partial_die_full_name (pdi
, cu
);
2448 built_actual_name
= 1;
2451 if (actual_name
== NULL
)
2452 actual_name
= pdi
->name
;
2456 case DW_TAG_subprogram
:
2457 if (pdi
->is_external
|| cu
->language
== language_ada
)
2459 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2460 of the global scope. But in Ada, we want to be able to access
2461 nested procedures globally. So all Ada subprograms are stored
2462 in the global scope. */
2463 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2464 mst_text, objfile); */
2465 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2467 VAR_DOMAIN
, LOC_BLOCK
,
2468 &objfile
->global_psymbols
,
2469 0, pdi
->lowpc
+ baseaddr
,
2470 cu
->language
, objfile
);
2474 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2475 mst_file_text, objfile); */
2476 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2478 VAR_DOMAIN
, LOC_BLOCK
,
2479 &objfile
->static_psymbols
,
2480 0, pdi
->lowpc
+ baseaddr
,
2481 cu
->language
, objfile
);
2484 case DW_TAG_variable
:
2485 if (pdi
->is_external
)
2488 Don't enter into the minimal symbol tables as there is
2489 a minimal symbol table entry from the ELF symbols already.
2490 Enter into partial symbol table if it has a location
2491 descriptor or a type.
2492 If the location descriptor is missing, new_symbol will create
2493 a LOC_UNRESOLVED symbol, the address of the variable will then
2494 be determined from the minimal symbol table whenever the variable
2496 The address for the partial symbol table entry is not
2497 used by GDB, but it comes in handy for debugging partial symbol
2501 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2502 if (pdi
->locdesc
|| pdi
->has_type
)
2503 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2505 VAR_DOMAIN
, LOC_STATIC
,
2506 &objfile
->global_psymbols
,
2508 cu
->language
, objfile
);
2512 /* Static Variable. Skip symbols without location descriptors. */
2513 if (pdi
->locdesc
== NULL
)
2515 if (built_actual_name
)
2516 xfree (actual_name
);
2519 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2520 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2521 mst_file_data, objfile); */
2522 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2524 VAR_DOMAIN
, LOC_STATIC
,
2525 &objfile
->static_psymbols
,
2527 cu
->language
, objfile
);
2530 case DW_TAG_typedef
:
2531 case DW_TAG_base_type
:
2532 case DW_TAG_subrange_type
:
2533 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2535 VAR_DOMAIN
, LOC_TYPEDEF
,
2536 &objfile
->static_psymbols
,
2537 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2539 case DW_TAG_namespace
:
2540 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2542 VAR_DOMAIN
, LOC_TYPEDEF
,
2543 &objfile
->global_psymbols
,
2544 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2546 case DW_TAG_class_type
:
2547 case DW_TAG_interface_type
:
2548 case DW_TAG_structure_type
:
2549 case DW_TAG_union_type
:
2550 case DW_TAG_enumeration_type
:
2551 /* Skip external references. The DWARF standard says in the section
2552 about "Structure, Union, and Class Type Entries": "An incomplete
2553 structure, union or class type is represented by a structure,
2554 union or class entry that does not have a byte size attribute
2555 and that has a DW_AT_declaration attribute." */
2556 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2558 if (built_actual_name
)
2559 xfree (actual_name
);
2563 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2564 static vs. global. */
2565 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2567 STRUCT_DOMAIN
, LOC_TYPEDEF
,
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
);
2575 case DW_TAG_enumerator
:
2576 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2578 VAR_DOMAIN
, LOC_CONST
,
2579 (cu
->language
== language_cplus
2580 || cu
->language
== language_java
)
2581 ? &objfile
->global_psymbols
2582 : &objfile
->static_psymbols
,
2583 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2589 /* Check to see if we should scan the name for possible namespace
2590 info. Only do this if this is C++, if we don't have namespace
2591 debugging info in the file, if the psym is of an appropriate type
2592 (otherwise we'll have psym == NULL), and if we actually had a
2593 mangled name to begin with. */
2595 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2596 cases which do not set PSYM above? */
2598 if (cu
->language
== language_cplus
2599 && cu
->has_namespace_info
== 0
2601 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2602 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2605 if (built_actual_name
)
2606 xfree (actual_name
);
2609 /* Determine whether a die of type TAG living in a C++ class or
2610 namespace needs to have the name of the scope prepended to the
2611 name listed in the die. */
2614 pdi_needs_namespace (enum dwarf_tag tag
)
2618 case DW_TAG_namespace
:
2619 case DW_TAG_typedef
:
2620 case DW_TAG_class_type
:
2621 case DW_TAG_interface_type
:
2622 case DW_TAG_structure_type
:
2623 case DW_TAG_union_type
:
2624 case DW_TAG_enumeration_type
:
2625 case DW_TAG_enumerator
:
2632 /* Read a partial die corresponding to a namespace; also, add a symbol
2633 corresponding to that namespace to the symbol table. NAMESPACE is
2634 the name of the enclosing namespace. */
2637 add_partial_namespace (struct partial_die_info
*pdi
,
2638 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2639 int need_pc
, struct dwarf2_cu
*cu
)
2641 struct objfile
*objfile
= cu
->objfile
;
2643 /* Add a symbol for the namespace. */
2645 add_partial_symbol (pdi
, cu
);
2647 /* Now scan partial symbols in that namespace. */
2649 if (pdi
->has_children
)
2650 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2653 /* Read a partial die corresponding to a Fortran module. */
2656 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2657 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2659 /* Now scan partial symbols in that module.
2661 FIXME: Support the separate Fortran module namespaces. */
2663 if (pdi
->has_children
)
2664 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2667 /* Read a partial die corresponding to a subprogram and create a partial
2668 symbol for that subprogram. When the CU language allows it, this
2669 routine also defines a partial symbol for each nested subprogram
2670 that this subprogram contains.
2672 DIE my also be a lexical block, in which case we simply search
2673 recursively for suprograms defined inside that lexical block.
2674 Again, this is only performed when the CU language allows this
2675 type of definitions. */
2678 add_partial_subprogram (struct partial_die_info
*pdi
,
2679 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2680 int need_pc
, struct dwarf2_cu
*cu
)
2682 if (pdi
->tag
== DW_TAG_subprogram
)
2684 if (pdi
->has_pc_info
)
2686 if (pdi
->lowpc
< *lowpc
)
2687 *lowpc
= pdi
->lowpc
;
2688 if (pdi
->highpc
> *highpc
)
2689 *highpc
= pdi
->highpc
;
2693 struct objfile
*objfile
= cu
->objfile
;
2695 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2696 SECT_OFF_TEXT (objfile
));
2697 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2698 pdi
->lowpc
, pdi
->highpc
- 1,
2699 cu
->per_cu
->psymtab
);
2701 if (!pdi
->is_declaration
)
2702 add_partial_symbol (pdi
, cu
);
2706 if (! pdi
->has_children
)
2709 if (cu
->language
== language_ada
)
2711 pdi
= pdi
->die_child
;
2714 fixup_partial_die (pdi
, cu
);
2715 if (pdi
->tag
== DW_TAG_subprogram
2716 || pdi
->tag
== DW_TAG_lexical_block
)
2717 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2718 pdi
= pdi
->die_sibling
;
2723 /* See if we can figure out if the class lives in a namespace. We do
2724 this by looking for a member function; its demangled name will
2725 contain namespace info, if there is any. */
2728 guess_structure_name (struct partial_die_info
*struct_pdi
,
2729 struct dwarf2_cu
*cu
)
2731 if ((cu
->language
== language_cplus
2732 || cu
->language
== language_java
)
2733 && cu
->has_namespace_info
== 0
2734 && struct_pdi
->has_children
)
2736 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2737 what template types look like, because the demangler
2738 frequently doesn't give the same name as the debug info. We
2739 could fix this by only using the demangled name to get the
2740 prefix (but see comment in read_structure_type). */
2742 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2743 struct partial_die_info
*real_pdi
;
2745 /* If this DIE (this DIE's specification, if any) has a parent, then
2746 we should not do this. We'll prepend the parent's fully qualified
2747 name when we create the partial symbol. */
2749 real_pdi
= struct_pdi
;
2750 while (real_pdi
->has_specification
)
2751 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2753 if (real_pdi
->die_parent
!= NULL
)
2756 while (child_pdi
!= NULL
)
2758 if (child_pdi
->tag
== DW_TAG_subprogram
)
2760 char *actual_class_name
2761 = language_class_name_from_physname (cu
->language_defn
,
2763 if (actual_class_name
!= NULL
)
2766 = obsavestring (actual_class_name
,
2767 strlen (actual_class_name
),
2768 &cu
->comp_unit_obstack
);
2769 xfree (actual_class_name
);
2774 child_pdi
= child_pdi
->die_sibling
;
2779 /* Read a partial die corresponding to an enumeration type. */
2782 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2783 struct dwarf2_cu
*cu
)
2785 struct objfile
*objfile
= cu
->objfile
;
2786 bfd
*abfd
= objfile
->obfd
;
2787 struct partial_die_info
*pdi
;
2789 if (enum_pdi
->name
!= NULL
)
2790 add_partial_symbol (enum_pdi
, cu
);
2792 pdi
= enum_pdi
->die_child
;
2795 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2796 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2798 add_partial_symbol (pdi
, cu
);
2799 pdi
= pdi
->die_sibling
;
2803 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2804 Return the corresponding abbrev, or NULL if the number is zero (indicating
2805 an empty DIE). In either case *BYTES_READ will be set to the length of
2806 the initial number. */
2808 static struct abbrev_info
*
2809 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2810 struct dwarf2_cu
*cu
)
2812 bfd
*abfd
= cu
->objfile
->obfd
;
2813 unsigned int abbrev_number
;
2814 struct abbrev_info
*abbrev
;
2816 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2818 if (abbrev_number
== 0)
2821 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2824 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2825 bfd_get_filename (abfd
));
2831 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2832 Returns a pointer to the end of a series of DIEs, terminated by an empty
2833 DIE. Any children of the skipped DIEs will also be skipped. */
2836 skip_children (gdb_byte
*buffer
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2838 struct abbrev_info
*abbrev
;
2839 unsigned int bytes_read
;
2843 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2845 return info_ptr
+ bytes_read
;
2847 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
2851 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
2852 INFO_PTR should point just after the initial uleb128 of a DIE, and the
2853 abbrev corresponding to that skipped uleb128 should be passed in
2854 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2858 skip_one_die (gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2859 struct abbrev_info
*abbrev
, struct dwarf2_cu
*cu
)
2861 unsigned int bytes_read
;
2862 struct attribute attr
;
2863 bfd
*abfd
= cu
->objfile
->obfd
;
2864 unsigned int form
, i
;
2866 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2868 /* The only abbrev we care about is DW_AT_sibling. */
2869 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2871 read_attribute (&attr
, &abbrev
->attrs
[i
],
2872 abfd
, info_ptr
, cu
);
2873 if (attr
.form
== DW_FORM_ref_addr
)
2874 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2876 return buffer
+ dwarf2_get_ref_die_offset (&attr
);
2879 /* If it isn't DW_AT_sibling, skip this attribute. */
2880 form
= abbrev
->attrs
[i
].form
;
2885 case DW_FORM_ref_addr
:
2886 info_ptr
+= cu
->header
.addr_size
;
2906 case DW_FORM_string
:
2907 read_string (abfd
, info_ptr
, &bytes_read
);
2908 info_ptr
+= bytes_read
;
2911 info_ptr
+= cu
->header
.offset_size
;
2914 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2915 info_ptr
+= bytes_read
;
2917 case DW_FORM_block1
:
2918 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2920 case DW_FORM_block2
:
2921 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2923 case DW_FORM_block4
:
2924 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2928 case DW_FORM_ref_udata
:
2929 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2931 case DW_FORM_indirect
:
2932 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2933 info_ptr
+= bytes_read
;
2934 /* We need to continue parsing from here, so just go back to
2936 goto skip_attribute
;
2939 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2940 dwarf_form_name (form
),
2941 bfd_get_filename (abfd
));
2945 if (abbrev
->has_children
)
2946 return skip_children (buffer
, info_ptr
, cu
);
2951 /* Locate ORIG_PDI's sibling.
2952 INFO_PTR should point to the start of the next DIE after ORIG_PDI
2956 locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
2957 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
2958 bfd
*abfd
, struct dwarf2_cu
*cu
)
2960 /* Do we know the sibling already? */
2962 if (orig_pdi
->sibling
)
2963 return orig_pdi
->sibling
;
2965 /* Are there any children to deal with? */
2967 if (!orig_pdi
->has_children
)
2970 /* Skip the children the long way. */
2972 return skip_children (buffer
, info_ptr
, cu
);
2975 /* Expand this partial symbol table into a full symbol table. */
2978 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2980 /* FIXME: This is barely more than a stub. */
2985 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2991 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2992 gdb_flush (gdb_stdout
);
2995 /* Restore our global data. */
2996 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2997 dwarf2_objfile_data_key
);
2999 /* If this psymtab is constructed from a debug-only objfile, the
3000 has_section_at_zero flag will not necessarily be correct. We
3001 can get the correct value for this flag by looking at the data
3002 associated with the (presumably stripped) associated objfile. */
3003 if (pst
->objfile
->separate_debug_objfile_backlink
)
3005 struct dwarf2_per_objfile
*dpo_backlink
3006 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
3007 dwarf2_objfile_data_key
);
3008 dwarf2_per_objfile
->has_section_at_zero
3009 = dpo_backlink
->has_section_at_zero
;
3012 psymtab_to_symtab_1 (pst
);
3014 /* Finish up the debug error message. */
3016 printf_filtered (_("done.\n"));
3021 /* Add PER_CU to the queue. */
3024 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3026 struct dwarf2_queue_item
*item
;
3029 item
= xmalloc (sizeof (*item
));
3030 item
->per_cu
= per_cu
;
3033 if (dwarf2_queue
== NULL
)
3034 dwarf2_queue
= item
;
3036 dwarf2_queue_tail
->next
= item
;
3038 dwarf2_queue_tail
= item
;
3041 /* Process the queue. */
3044 process_queue (struct objfile
*objfile
)
3046 struct dwarf2_queue_item
*item
, *next_item
;
3048 /* The queue starts out with one item, but following a DIE reference
3049 may load a new CU, adding it to the end of the queue. */
3050 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
3052 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
3053 process_full_comp_unit (item
->per_cu
);
3055 item
->per_cu
->queued
= 0;
3056 next_item
= item
->next
;
3060 dwarf2_queue_tail
= NULL
;
3063 /* Free all allocated queue entries. This function only releases anything if
3064 an error was thrown; if the queue was processed then it would have been
3065 freed as we went along. */
3068 dwarf2_release_queue (void *dummy
)
3070 struct dwarf2_queue_item
*item
, *last
;
3072 item
= dwarf2_queue
;
3075 /* Anything still marked queued is likely to be in an
3076 inconsistent state, so discard it. */
3077 if (item
->per_cu
->queued
)
3079 if (item
->per_cu
->cu
!= NULL
)
3080 free_one_cached_comp_unit (item
->per_cu
->cu
);
3081 item
->per_cu
->queued
= 0;
3089 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
3092 /* Read in full symbols for PST, and anything it depends on. */
3095 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
3097 struct dwarf2_per_cu_data
*per_cu
;
3098 struct cleanup
*back_to
;
3101 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
3102 if (!pst
->dependencies
[i
]->readin
)
3104 /* Inform about additional files that need to be read in. */
3107 /* FIXME: i18n: Need to make this a single string. */
3108 fputs_filtered (" ", gdb_stdout
);
3110 fputs_filtered ("and ", gdb_stdout
);
3112 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
3113 wrap_here (""); /* Flush output */
3114 gdb_flush (gdb_stdout
);
3116 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
3119 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
3123 /* It's an include file, no symbols to read for it.
3124 Everything is in the parent symtab. */
3129 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
3131 queue_comp_unit (per_cu
, pst
->objfile
);
3133 if (per_cu
->from_debug_types
)
3134 read_signatured_type_at_offset (pst
->objfile
, per_cu
->offset
);
3136 load_full_comp_unit (per_cu
, pst
->objfile
);
3138 process_queue (pst
->objfile
);
3140 /* Age the cache, releasing compilation units that have not
3141 been used recently. */
3142 age_cached_comp_units ();
3144 do_cleanups (back_to
);
3147 /* Load the DIEs associated with PER_CU into memory. */
3150 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
3152 bfd
*abfd
= objfile
->obfd
;
3153 struct dwarf2_cu
*cu
;
3154 unsigned int offset
;
3155 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
3156 struct cleanup
*back_to
, *free_cu_cleanup
;
3157 struct attribute
*attr
;
3160 gdb_assert (! per_cu
->from_debug_types
);
3162 /* Set local variables from the partial symbol table info. */
3163 offset
= per_cu
->offset
;
3165 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
3166 beg_of_comp_unit
= info_ptr
;
3168 cu
= alloc_one_comp_unit (objfile
);
3170 /* If an error occurs while loading, release our storage. */
3171 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
3173 /* Read in the comp_unit header. */
3174 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
3176 /* Complete the cu_header. */
3177 cu
->header
.offset
= offset
;
3178 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
3180 /* Read the abbrevs for this compilation unit. */
3181 dwarf2_read_abbrevs (abfd
, cu
);
3182 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
3184 /* Link this compilation unit into the compilation unit tree. */
3186 cu
->per_cu
= per_cu
;
3187 cu
->type_hash
= per_cu
->type_hash
;
3189 cu
->dies
= read_comp_unit (info_ptr
, cu
);
3191 /* We try not to read any attributes in this function, because not
3192 all objfiles needed for references have been loaded yet, and symbol
3193 table processing isn't initialized. But we have to set the CU language,
3194 or we won't be able to build types correctly. */
3195 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
3197 set_cu_language (DW_UNSND (attr
), cu
);
3199 set_cu_language (language_minimal
, cu
);
3201 /* Link this CU into read_in_chain. */
3202 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
3203 dwarf2_per_objfile
->read_in_chain
= per_cu
;
3205 do_cleanups (back_to
);
3207 /* We've successfully allocated this compilation unit. Let our caller
3208 clean it up when finished with it. */
3209 discard_cleanups (free_cu_cleanup
);
3212 /* Generate full symbol information for PST and CU, whose DIEs have
3213 already been loaded into memory. */
3216 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
3218 struct partial_symtab
*pst
= per_cu
->psymtab
;
3219 struct dwarf2_cu
*cu
= per_cu
->cu
;
3220 struct objfile
*objfile
= pst
->objfile
;
3221 bfd
*abfd
= objfile
->obfd
;
3222 CORE_ADDR lowpc
, highpc
;
3223 struct symtab
*symtab
;
3224 struct cleanup
*back_to
;
3227 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3230 back_to
= make_cleanup (really_free_pendings
, NULL
);
3232 cu
->list_in_scope
= &file_symbols
;
3234 dwarf2_find_base_address (cu
->dies
, cu
);
3236 /* Do line number decoding in read_file_scope () */
3237 process_die (cu
->dies
, cu
);
3239 /* Some compilers don't define a DW_AT_high_pc attribute for the
3240 compilation unit. If the DW_AT_high_pc is missing, synthesize
3241 it, by scanning the DIE's below the compilation unit. */
3242 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
3244 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
3246 /* Set symtab language to language from DW_AT_language.
3247 If the compilation is from a C file generated by language preprocessors,
3248 do not set the language if it was already deduced by start_subfile. */
3250 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
3252 symtab
->language
= cu
->language
;
3254 pst
->symtab
= symtab
;
3257 do_cleanups (back_to
);
3260 /* Process a die and its children. */
3263 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
3267 case DW_TAG_padding
:
3269 case DW_TAG_compile_unit
:
3270 read_file_scope (die
, cu
);
3272 case DW_TAG_type_unit
:
3273 read_type_unit_scope (die
, cu
);
3275 case DW_TAG_subprogram
:
3276 case DW_TAG_inlined_subroutine
:
3277 read_func_scope (die
, cu
);
3279 case DW_TAG_lexical_block
:
3280 case DW_TAG_try_block
:
3281 case DW_TAG_catch_block
:
3282 read_lexical_block_scope (die
, cu
);
3284 case DW_TAG_class_type
:
3285 case DW_TAG_interface_type
:
3286 case DW_TAG_structure_type
:
3287 case DW_TAG_union_type
:
3288 process_structure_scope (die
, cu
);
3290 case DW_TAG_enumeration_type
:
3291 process_enumeration_scope (die
, cu
);
3294 /* These dies have a type, but processing them does not create
3295 a symbol or recurse to process the children. Therefore we can
3296 read them on-demand through read_type_die. */
3297 case DW_TAG_subroutine_type
:
3298 case DW_TAG_set_type
:
3299 case DW_TAG_array_type
:
3300 case DW_TAG_pointer_type
:
3301 case DW_TAG_ptr_to_member_type
:
3302 case DW_TAG_reference_type
:
3303 case DW_TAG_string_type
:
3306 case DW_TAG_base_type
:
3307 case DW_TAG_subrange_type
:
3308 case DW_TAG_typedef
:
3309 /* Add a typedef symbol for the type definition, if it has a
3311 new_symbol (die
, read_type_die (die
, cu
), cu
);
3313 case DW_TAG_common_block
:
3314 read_common_block (die
, cu
);
3316 case DW_TAG_common_inclusion
:
3318 case DW_TAG_namespace
:
3319 processing_has_namespace_info
= 1;
3320 read_namespace (die
, cu
);
3323 read_module (die
, cu
);
3325 case DW_TAG_imported_declaration
:
3326 case DW_TAG_imported_module
:
3327 processing_has_namespace_info
= 1;
3328 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
3329 || cu
->language
!= language_fortran
))
3330 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
3331 dwarf_tag_name (die
->tag
));
3332 read_import_statement (die
, cu
);
3335 new_symbol (die
, NULL
, cu
);
3340 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3341 If scope qualifiers are appropriate they will be added. The result
3342 will be allocated on the objfile_obstack, or NULL if the DIE does
3346 dwarf2_full_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
3348 struct attribute
*attr
;
3349 char *prefix
, *name
;
3350 struct ui_file
*buf
= NULL
;
3352 name
= dwarf2_name (die
, cu
);
3356 /* These are the only languages we know how to qualify names in. */
3357 if (cu
->language
!= language_cplus
3358 && cu
->language
!= language_java
)
3361 /* If no prefix is necessary for this type of DIE, return the
3362 unqualified name. The other three tags listed could be handled
3363 in pdi_needs_namespace, but that requires broader changes. */
3364 if (!pdi_needs_namespace (die
->tag
)
3365 && die
->tag
!= DW_TAG_subprogram
3366 && die
->tag
!= DW_TAG_variable
3367 && die
->tag
!= DW_TAG_member
)
3370 prefix
= determine_prefix (die
, cu
);
3371 if (*prefix
!= '\0')
3372 name
= typename_concat (&cu
->objfile
->objfile_obstack
, prefix
,
3378 /* Read the import statement specified by the given die and record it. */
3381 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3383 struct attribute
*import_attr
;
3384 struct die_info
*imported_die
;
3385 struct dwarf2_cu
*imported_cu
;
3386 const char *imported_name
;
3387 const char *imported_name_prefix
;
3388 const char *import_prefix
;
3389 char *canonical_name
;
3391 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3392 if (import_attr
== NULL
)
3394 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3395 dwarf_tag_name (die
->tag
));
3400 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
3401 imported_name
= dwarf2_name (imported_die
, imported_cu
);
3402 if (imported_name
== NULL
)
3404 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3406 The import in the following code:
3420 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3421 <52> DW_AT_decl_file : 1
3422 <53> DW_AT_decl_line : 6
3423 <54> DW_AT_import : <0x75>
3424 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3426 <5b> DW_AT_decl_file : 1
3427 <5c> DW_AT_decl_line : 2
3428 <5d> DW_AT_type : <0x6e>
3430 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3431 <76> DW_AT_byte_size : 4
3432 <77> DW_AT_encoding : 5 (signed)
3434 imports the wrong die ( 0x75 instead of 0x58 ).
3435 This case will be ignored until the gcc bug is fixed. */
3439 /* FIXME: dwarf2_name (die); for the local name after import. */
3441 /* Figure out where the statement is being imported to. */
3442 import_prefix
= determine_prefix (die
, cu
);
3444 /* Figure out what the scope of the imported die is and prepend it
3445 to the name of the imported die. */
3446 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
3448 if (strlen (imported_name_prefix
) > 0)
3450 canonical_name
= alloca (strlen (imported_name_prefix
) + 2 + strlen (imported_name
) + 1);
3451 strcpy (canonical_name
, imported_name_prefix
);
3452 strcat (canonical_name
, "::");
3453 strcat (canonical_name
, imported_name
);
3457 canonical_name
= alloca (strlen (imported_name
) + 1);
3458 strcpy (canonical_name
, imported_name
);
3461 using_directives
= cp_add_using (import_prefix
,canonical_name
, using_directives
);
3465 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3467 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3471 free_cu_line_header (void *arg
)
3473 struct dwarf2_cu
*cu
= arg
;
3475 free_line_header (cu
->line_header
);
3476 cu
->line_header
= NULL
;
3480 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3482 struct objfile
*objfile
= cu
->objfile
;
3483 struct comp_unit_head
*cu_header
= &cu
->header
;
3484 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3485 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3486 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3487 struct attribute
*attr
;
3489 char *comp_dir
= NULL
;
3490 struct die_info
*child_die
;
3491 bfd
*abfd
= objfile
->obfd
;
3492 struct line_header
*line_header
= 0;
3495 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3497 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3499 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3500 from finish_block. */
3501 if (lowpc
== ((CORE_ADDR
) -1))
3506 /* Find the filename. Do not use dwarf2_name here, since the filename
3507 is not a source language identifier. */
3508 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3511 name
= DW_STRING (attr
);
3514 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3516 comp_dir
= DW_STRING (attr
);
3517 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3519 comp_dir
= ldirname (name
);
3520 if (comp_dir
!= NULL
)
3521 make_cleanup (xfree
, comp_dir
);
3523 if (comp_dir
!= NULL
)
3525 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3526 directory, get rid of it. */
3527 char *cp
= strchr (comp_dir
, ':');
3529 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3536 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3539 set_cu_language (DW_UNSND (attr
), cu
);
3542 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3544 cu
->producer
= DW_STRING (attr
);
3546 /* We assume that we're processing GCC output. */
3547 processing_gcc_compilation
= 2;
3549 processing_has_namespace_info
= 0;
3551 start_symtab (name
, comp_dir
, lowpc
);
3552 record_debugformat ("DWARF 2");
3553 record_producer (cu
->producer
);
3555 initialize_cu_func_list (cu
);
3557 /* Decode line number information if present. We do this before
3558 processing child DIEs, so that the line header table is available
3559 for DW_AT_decl_file. */
3560 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3563 unsigned int line_offset
= DW_UNSND (attr
);
3564 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3567 cu
->line_header
= line_header
;
3568 make_cleanup (free_cu_line_header
, cu
);
3569 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3573 /* Process all dies in compilation unit. */
3574 if (die
->child
!= NULL
)
3576 child_die
= die
->child
;
3577 while (child_die
&& child_die
->tag
)
3579 process_die (child_die
, cu
);
3580 child_die
= sibling_die (child_die
);
3584 /* Decode macro information, if present. Dwarf 2 macro information
3585 refers to information in the line number info statement program
3586 header, so we can only read it if we've read the header
3588 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3589 if (attr
&& line_header
)
3591 unsigned int macro_offset
= DW_UNSND (attr
);
3592 dwarf_decode_macros (line_header
, macro_offset
,
3593 comp_dir
, abfd
, cu
);
3595 do_cleanups (back_to
);
3598 /* For TUs we want to skip the first top level sibling if it's not the
3599 actual type being defined by this TU. In this case the first top
3600 level sibling is there to provide context only. */
3603 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3605 struct objfile
*objfile
= cu
->objfile
;
3606 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3608 struct attribute
*attr
;
3610 char *comp_dir
= NULL
;
3611 struct die_info
*child_die
;
3612 bfd
*abfd
= objfile
->obfd
;
3613 struct line_header
*line_header
= 0;
3615 /* start_symtab needs a low pc, but we don't really have one.
3616 Do what read_file_scope would do in the absence of such info. */
3617 lowpc
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3619 /* Find the filename. Do not use dwarf2_name here, since the filename
3620 is not a source language identifier. */
3621 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3623 name
= DW_STRING (attr
);
3625 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3627 comp_dir
= DW_STRING (attr
);
3628 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3630 comp_dir
= ldirname (name
);
3631 if (comp_dir
!= NULL
)
3632 make_cleanup (xfree
, comp_dir
);
3638 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3640 set_cu_language (DW_UNSND (attr
), cu
);
3642 /* This isn't technically needed today. It is done for symmetry
3643 with read_file_scope. */
3644 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3646 cu
->producer
= DW_STRING (attr
);
3648 /* We assume that we're processing GCC output. */
3649 processing_gcc_compilation
= 2;
3651 processing_has_namespace_info
= 0;
3653 start_symtab (name
, comp_dir
, lowpc
);
3654 record_debugformat ("DWARF 2");
3655 record_producer (cu
->producer
);
3657 /* Process the dies in the type unit. */
3658 if (die
->child
== NULL
)
3660 dump_die_for_error (die
);
3661 error (_("Dwarf Error: Missing children for type unit [in module %s]"),
3662 bfd_get_filename (abfd
));
3665 child_die
= die
->child
;
3667 while (child_die
&& child_die
->tag
)
3669 process_die (child_die
, cu
);
3671 child_die
= sibling_die (child_die
);
3674 do_cleanups (back_to
);
3678 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3679 struct dwarf2_cu
*cu
)
3681 struct function_range
*thisfn
;
3683 thisfn
= (struct function_range
*)
3684 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3685 thisfn
->name
= name
;
3686 thisfn
->lowpc
= lowpc
;
3687 thisfn
->highpc
= highpc
;
3688 thisfn
->seen_line
= 0;
3689 thisfn
->next
= NULL
;
3691 if (cu
->last_fn
== NULL
)
3692 cu
->first_fn
= thisfn
;
3694 cu
->last_fn
->next
= thisfn
;
3696 cu
->last_fn
= thisfn
;
3699 /* qsort helper for inherit_abstract_dies. */
3702 unsigned_int_compar (const void *ap
, const void *bp
)
3704 unsigned int a
= *(unsigned int *) ap
;
3705 unsigned int b
= *(unsigned int *) bp
;
3707 return (a
> b
) - (b
> a
);
3710 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3711 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3712 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3715 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3717 struct die_info
*child_die
;
3718 unsigned die_children_count
;
3719 /* CU offsets which were referenced by children of the current DIE. */
3721 unsigned *offsets_end
, *offsetp
;
3722 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3723 struct die_info
*origin_die
;
3724 /* Iterator of the ORIGIN_DIE children. */
3725 struct die_info
*origin_child_die
;
3726 struct cleanup
*cleanups
;
3727 struct attribute
*attr
;
3729 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3733 origin_die
= follow_die_ref (die
, attr
, &cu
);
3734 if (die
->tag
!= origin_die
->tag
3735 && !(die
->tag
== DW_TAG_inlined_subroutine
3736 && origin_die
->tag
== DW_TAG_subprogram
))
3737 complaint (&symfile_complaints
,
3738 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3739 die
->offset
, origin_die
->offset
);
3741 child_die
= die
->child
;
3742 die_children_count
= 0;
3743 while (child_die
&& child_die
->tag
)
3745 child_die
= sibling_die (child_die
);
3746 die_children_count
++;
3748 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3749 cleanups
= make_cleanup (xfree
, offsets
);
3751 offsets_end
= offsets
;
3752 child_die
= die
->child
;
3753 while (child_die
&& child_die
->tag
)
3755 /* For each CHILD_DIE, find the corresponding child of
3756 ORIGIN_DIE. If there is more than one layer of
3757 DW_AT_abstract_origin, follow them all; there shouldn't be,
3758 but GCC versions at least through 4.4 generate this (GCC PR
3760 struct die_info
*child_origin_die
= child_die
;
3763 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3766 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3769 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3770 counterpart may exist. */
3771 if (child_origin_die
!= child_die
)
3773 if (child_die
->tag
!= child_origin_die
->tag
3774 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3775 && child_origin_die
->tag
== DW_TAG_subprogram
))
3776 complaint (&symfile_complaints
,
3777 _("Child DIE 0x%x and its abstract origin 0x%x have "
3778 "different tags"), child_die
->offset
,
3779 child_origin_die
->offset
);
3780 if (child_origin_die
->parent
!= origin_die
)
3781 complaint (&symfile_complaints
,
3782 _("Child DIE 0x%x and its abstract origin 0x%x have "
3783 "different parents"), child_die
->offset
,
3784 child_origin_die
->offset
);
3786 *offsets_end
++ = child_origin_die
->offset
;
3788 child_die
= sibling_die (child_die
);
3790 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3791 unsigned_int_compar
);
3792 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3793 if (offsetp
[-1] == *offsetp
)
3794 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3795 "to DIE 0x%x as their abstract origin"),
3796 die
->offset
, *offsetp
);
3799 origin_child_die
= origin_die
->child
;
3800 while (origin_child_die
&& origin_child_die
->tag
)
3802 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3803 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3805 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3807 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3808 process_die (origin_child_die
, cu
);
3810 origin_child_die
= sibling_die (origin_child_die
);
3813 do_cleanups (cleanups
);
3817 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3819 struct objfile
*objfile
= cu
->objfile
;
3820 struct context_stack
*new;
3823 struct die_info
*child_die
;
3824 struct attribute
*attr
, *call_line
, *call_file
;
3827 struct block
*block
;
3828 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3832 /* If we do not have call site information, we can't show the
3833 caller of this inlined function. That's too confusing, so
3834 only use the scope for local variables. */
3835 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3836 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3837 if (call_line
== NULL
|| call_file
== NULL
)
3839 read_lexical_block_scope (die
, cu
);
3844 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3846 name
= dwarf2_linkage_name (die
, cu
);
3848 /* Ignore functions with missing or empty names and functions with
3849 missing or invalid low and high pc attributes. */
3850 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3856 /* Record the function range for dwarf_decode_lines. */
3857 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3859 new = push_context (0, lowpc
);
3860 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3862 /* If there is a location expression for DW_AT_frame_base, record
3864 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3866 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3867 expression is being recorded directly in the function's symbol
3868 and not in a separate frame-base object. I guess this hack is
3869 to avoid adding some sort of frame-base adjunct/annex to the
3870 function's symbol :-(. The problem with doing this is that it
3871 results in a function symbol with a location expression that
3872 has nothing to do with the location of the function, ouch! The
3873 relationship should be: a function's symbol has-a frame base; a
3874 frame-base has-a location expression. */
3875 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3877 cu
->list_in_scope
= &local_symbols
;
3879 if (die
->child
!= NULL
)
3881 child_die
= die
->child
;
3882 while (child_die
&& child_die
->tag
)
3884 process_die (child_die
, cu
);
3885 child_die
= sibling_die (child_die
);
3889 inherit_abstract_dies (die
, cu
);
3891 new = pop_context ();
3892 /* Make a block for the local symbols within. */
3893 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3894 lowpc
, highpc
, objfile
);
3896 /* For C++, set the block's scope. */
3897 if (cu
->language
== language_cplus
)
3898 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3899 determine_prefix (die
, cu
),
3900 processing_has_namespace_info
);
3902 /* If we have address ranges, record them. */
3903 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3905 /* In C++, we can have functions nested inside functions (e.g., when
3906 a function declares a class that has methods). This means that
3907 when we finish processing a function scope, we may need to go
3908 back to building a containing block's symbol lists. */
3909 local_symbols
= new->locals
;
3910 param_symbols
= new->params
;
3911 using_directives
= new->using_directives
;
3913 /* If we've finished processing a top-level function, subsequent
3914 symbols go in the file symbol list. */
3915 if (outermost_context_p ())
3916 cu
->list_in_scope
= &file_symbols
;
3919 /* Process all the DIES contained within a lexical block scope. Start
3920 a new scope, process the dies, and then close the scope. */
3923 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3925 struct objfile
*objfile
= cu
->objfile
;
3926 struct context_stack
*new;
3927 CORE_ADDR lowpc
, highpc
;
3928 struct die_info
*child_die
;
3931 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3933 /* Ignore blocks with missing or invalid low and high pc attributes. */
3934 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3935 as multiple lexical blocks? Handling children in a sane way would
3936 be nasty. Might be easier to properly extend generic blocks to
3938 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
3943 push_context (0, lowpc
);
3944 if (die
->child
!= NULL
)
3946 child_die
= die
->child
;
3947 while (child_die
&& child_die
->tag
)
3949 process_die (child_die
, cu
);
3950 child_die
= sibling_die (child_die
);
3953 new = pop_context ();
3955 if (local_symbols
!= NULL
)
3958 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3961 /* Note that recording ranges after traversing children, as we
3962 do here, means that recording a parent's ranges entails
3963 walking across all its children's ranges as they appear in
3964 the address map, which is quadratic behavior.
3966 It would be nicer to record the parent's ranges before
3967 traversing its children, simply overriding whatever you find
3968 there. But since we don't even decide whether to create a
3969 block until after we've traversed its children, that's hard
3971 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3973 local_symbols
= new->locals
;
3974 using_directives
= new->using_directives
;
3977 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3978 Return 1 if the attributes are present and valid, otherwise, return 0.
3979 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3982 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3983 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
3984 struct partial_symtab
*ranges_pst
)
3986 struct objfile
*objfile
= cu
->objfile
;
3987 struct comp_unit_head
*cu_header
= &cu
->header
;
3988 bfd
*obfd
= objfile
->obfd
;
3989 unsigned int addr_size
= cu_header
->addr_size
;
3990 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3991 /* Base address selection entry. */
4002 found_base
= cu
->base_known
;
4003 base
= cu
->base_address
;
4005 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4007 complaint (&symfile_complaints
,
4008 _("Offset %d out of bounds for DW_AT_ranges attribute"),
4012 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4014 /* Read in the largest possible address. */
4015 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
4016 if ((marker
& mask
) == mask
)
4018 /* If we found the largest possible address, then
4019 read the base address. */
4020 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4021 buffer
+= 2 * addr_size
;
4022 offset
+= 2 * addr_size
;
4028 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
4032 CORE_ADDR range_beginning
, range_end
;
4034 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
4035 buffer
+= addr_size
;
4036 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
4037 buffer
+= addr_size
;
4038 offset
+= 2 * addr_size
;
4040 /* An end of list marker is a pair of zero addresses. */
4041 if (range_beginning
== 0 && range_end
== 0)
4042 /* Found the end of list entry. */
4045 /* Each base address selection entry is a pair of 2 values.
4046 The first is the largest possible address, the second is
4047 the base address. Check for a base address here. */
4048 if ((range_beginning
& mask
) == mask
)
4050 /* If we found the largest possible address, then
4051 read the base address. */
4052 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
4059 /* We have no valid base address for the ranges
4061 complaint (&symfile_complaints
,
4062 _("Invalid .debug_ranges data (no base address)"));
4066 range_beginning
+= base
;
4069 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
4070 addrmap_set_empty (objfile
->psymtabs_addrmap
,
4071 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
4074 /* FIXME: This is recording everything as a low-high
4075 segment of consecutive addresses. We should have a
4076 data structure for discontiguous block ranges
4080 low
= range_beginning
;
4086 if (range_beginning
< low
)
4087 low
= range_beginning
;
4088 if (range_end
> high
)
4094 /* If the first entry is an end-of-list marker, the range
4095 describes an empty scope, i.e. no instructions. */
4101 *high_return
= high
;
4105 /* Get low and high pc attributes from a die. Return 1 if the attributes
4106 are present and valid, otherwise, return 0. Return -1 if the range is
4107 discontinuous, i.e. derived from DW_AT_ranges information. */
4109 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
4110 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
4111 struct partial_symtab
*pst
)
4113 struct attribute
*attr
;
4118 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4121 high
= DW_ADDR (attr
);
4122 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4124 low
= DW_ADDR (attr
);
4126 /* Found high w/o low attribute. */
4129 /* Found consecutive range of addresses. */
4134 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4137 /* Value of the DW_AT_ranges attribute is the offset in the
4138 .debug_ranges section. */
4139 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, pst
))
4141 /* Found discontinuous range of addresses. */
4149 /* When using the GNU linker, .gnu.linkonce. sections are used to
4150 eliminate duplicate copies of functions and vtables and such.
4151 The linker will arbitrarily choose one and discard the others.
4152 The AT_*_pc values for such functions refer to local labels in
4153 these sections. If the section from that file was discarded, the
4154 labels are not in the output, so the relocs get a value of 0.
4155 If this is a discarded function, mark the pc bounds as invalid,
4156 so that GDB will ignore it. */
4157 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
4165 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
4166 its low and high PC addresses. Do nothing if these addresses could not
4167 be determined. Otherwise, set LOWPC to the low address if it is smaller,
4168 and HIGHPC to the high address if greater than HIGHPC. */
4171 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
4172 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4173 struct dwarf2_cu
*cu
)
4175 CORE_ADDR low
, high
;
4176 struct die_info
*child
= die
->child
;
4178 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
))
4180 *lowpc
= min (*lowpc
, low
);
4181 *highpc
= max (*highpc
, high
);
4184 /* If the language does not allow nested subprograms (either inside
4185 subprograms or lexical blocks), we're done. */
4186 if (cu
->language
!= language_ada
)
4189 /* Check all the children of the given DIE. If it contains nested
4190 subprograms, then check their pc bounds. Likewise, we need to
4191 check lexical blocks as well, as they may also contain subprogram
4193 while (child
&& child
->tag
)
4195 if (child
->tag
== DW_TAG_subprogram
4196 || child
->tag
== DW_TAG_lexical_block
)
4197 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
4198 child
= sibling_die (child
);
4202 /* Get the low and high pc's represented by the scope DIE, and store
4203 them in *LOWPC and *HIGHPC. If the correct values can't be
4204 determined, set *LOWPC to -1 and *HIGHPC to 0. */
4207 get_scope_pc_bounds (struct die_info
*die
,
4208 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
4209 struct dwarf2_cu
*cu
)
4211 CORE_ADDR best_low
= (CORE_ADDR
) -1;
4212 CORE_ADDR best_high
= (CORE_ADDR
) 0;
4213 CORE_ADDR current_low
, current_high
;
4215 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
))
4217 best_low
= current_low
;
4218 best_high
= current_high
;
4222 struct die_info
*child
= die
->child
;
4224 while (child
&& child
->tag
)
4226 switch (child
->tag
) {
4227 case DW_TAG_subprogram
:
4228 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
4230 case DW_TAG_namespace
:
4231 /* FIXME: carlton/2004-01-16: Should we do this for
4232 DW_TAG_class_type/DW_TAG_structure_type, too? I think
4233 that current GCC's always emit the DIEs corresponding
4234 to definitions of methods of classes as children of a
4235 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
4236 the DIEs giving the declarations, which could be
4237 anywhere). But I don't see any reason why the
4238 standards says that they have to be there. */
4239 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
4241 if (current_low
!= ((CORE_ADDR
) -1))
4243 best_low
= min (best_low
, current_low
);
4244 best_high
= max (best_high
, current_high
);
4252 child
= sibling_die (child
);
4257 *highpc
= best_high
;
4260 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
4263 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
4264 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
4266 struct attribute
*attr
;
4268 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
4271 CORE_ADDR high
= DW_ADDR (attr
);
4272 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
4275 CORE_ADDR low
= DW_ADDR (attr
);
4276 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
4280 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
4283 bfd
*obfd
= cu
->objfile
->obfd
;
4285 /* The value of the DW_AT_ranges attribute is the offset of the
4286 address range list in the .debug_ranges section. */
4287 unsigned long offset
= DW_UNSND (attr
);
4288 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
4290 /* For some target architectures, but not others, the
4291 read_address function sign-extends the addresses it returns.
4292 To recognize base address selection entries, we need a
4294 unsigned int addr_size
= cu
->header
.addr_size
;
4295 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
4297 /* The base address, to which the next pair is relative. Note
4298 that this 'base' is a DWARF concept: most entries in a range
4299 list are relative, to reduce the number of relocs against the
4300 debugging information. This is separate from this function's
4301 'baseaddr' argument, which GDB uses to relocate debugging
4302 information from a shared library based on the address at
4303 which the library was loaded. */
4304 CORE_ADDR base
= cu
->base_address
;
4305 int base_known
= cu
->base_known
;
4307 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
4309 complaint (&symfile_complaints
,
4310 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
4317 unsigned int bytes_read
;
4318 CORE_ADDR start
, end
;
4320 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4321 buffer
+= bytes_read
;
4322 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
4323 buffer
+= bytes_read
;
4325 /* Did we find the end of the range list? */
4326 if (start
== 0 && end
== 0)
4329 /* Did we find a base address selection entry? */
4330 else if ((start
& base_select_mask
) == base_select_mask
)
4336 /* We found an ordinary address range. */
4341 complaint (&symfile_complaints
,
4342 _("Invalid .debug_ranges data (no base address)"));
4346 record_block_range (block
,
4347 baseaddr
+ base
+ start
,
4348 baseaddr
+ base
+ end
- 1);
4354 /* Add an aggregate field to the field list. */
4357 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
4358 struct dwarf2_cu
*cu
)
4360 struct objfile
*objfile
= cu
->objfile
;
4361 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
4362 struct nextfield
*new_field
;
4363 struct attribute
*attr
;
4365 char *fieldname
= "";
4367 /* Allocate a new field list entry and link it in. */
4368 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
4369 make_cleanup (xfree
, new_field
);
4370 memset (new_field
, 0, sizeof (struct nextfield
));
4372 if (die
->tag
== DW_TAG_inheritance
)
4374 new_field
->next
= fip
->baseclasses
;
4375 fip
->baseclasses
= new_field
;
4379 new_field
->next
= fip
->fields
;
4380 fip
->fields
= new_field
;
4384 /* Handle accessibility and virtuality of field.
4385 The default accessibility for members is public, the default
4386 accessibility for inheritance is private. */
4387 if (die
->tag
!= DW_TAG_inheritance
)
4388 new_field
->accessibility
= DW_ACCESS_public
;
4390 new_field
->accessibility
= DW_ACCESS_private
;
4391 new_field
->virtuality
= DW_VIRTUALITY_none
;
4393 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4395 new_field
->accessibility
= DW_UNSND (attr
);
4396 if (new_field
->accessibility
!= DW_ACCESS_public
)
4397 fip
->non_public_fields
= 1;
4398 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4400 new_field
->virtuality
= DW_UNSND (attr
);
4402 fp
= &new_field
->field
;
4404 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
4406 /* Data member other than a C++ static data member. */
4408 /* Get type of field. */
4409 fp
->type
= die_type (die
, cu
);
4411 SET_FIELD_BITPOS (*fp
, 0);
4413 /* Get bit size of field (zero if none). */
4414 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
4417 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
4421 FIELD_BITSIZE (*fp
) = 0;
4424 /* Get bit offset of field. */
4425 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4428 int byte_offset
= 0;
4430 if (attr_form_is_section_offset (attr
))
4431 dwarf2_complex_location_expr_complaint ();
4432 else if (attr_form_is_constant (attr
))
4433 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4434 else if (attr_form_is_block (attr
))
4435 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4437 dwarf2_complex_location_expr_complaint ();
4439 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4441 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4444 if (gdbarch_bits_big_endian (gdbarch
))
4446 /* For big endian bits, the DW_AT_bit_offset gives the
4447 additional bit offset from the MSB of the containing
4448 anonymous object to the MSB of the field. We don't
4449 have to do anything special since we don't need to
4450 know the size of the anonymous object. */
4451 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4455 /* For little endian bits, compute the bit offset to the
4456 MSB of the anonymous object, subtract off the number of
4457 bits from the MSB of the field to the MSB of the
4458 object, and then subtract off the number of bits of
4459 the field itself. The result is the bit offset of
4460 the LSB of the field. */
4462 int bit_offset
= DW_UNSND (attr
);
4464 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4467 /* The size of the anonymous object containing
4468 the bit field is explicit, so use the
4469 indicated size (in bytes). */
4470 anonymous_size
= DW_UNSND (attr
);
4474 /* The size of the anonymous object containing
4475 the bit field must be inferred from the type
4476 attribute of the data member containing the
4478 anonymous_size
= TYPE_LENGTH (fp
->type
);
4480 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4481 - bit_offset
- FIELD_BITSIZE (*fp
);
4485 /* Get name of field. */
4486 fieldname
= dwarf2_name (die
, cu
);
4487 if (fieldname
== NULL
)
4490 /* The name is already allocated along with this objfile, so we don't
4491 need to duplicate it for the type. */
4492 fp
->name
= fieldname
;
4494 /* Change accessibility for artificial fields (e.g. virtual table
4495 pointer or virtual base class pointer) to private. */
4496 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4498 FIELD_ARTIFICIAL (*fp
) = 1;
4499 new_field
->accessibility
= DW_ACCESS_private
;
4500 fip
->non_public_fields
= 1;
4503 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4505 /* C++ static member. */
4507 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4508 is a declaration, but all versions of G++ as of this writing
4509 (so through at least 3.2.1) incorrectly generate
4510 DW_TAG_variable tags. */
4514 /* Get name of field. */
4515 fieldname
= dwarf2_name (die
, cu
);
4516 if (fieldname
== NULL
)
4519 /* Get physical name. */
4520 physname
= dwarf2_linkage_name (die
, cu
);
4522 /* The name is already allocated along with this objfile, so we don't
4523 need to duplicate it for the type. */
4524 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4525 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4526 FIELD_NAME (*fp
) = fieldname
;
4528 else if (die
->tag
== DW_TAG_inheritance
)
4530 /* C++ base class field. */
4531 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4534 int byte_offset
= 0;
4536 if (attr_form_is_section_offset (attr
))
4537 dwarf2_complex_location_expr_complaint ();
4538 else if (attr_form_is_constant (attr
))
4539 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4540 else if (attr_form_is_block (attr
))
4541 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4543 dwarf2_complex_location_expr_complaint ();
4545 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4547 FIELD_BITSIZE (*fp
) = 0;
4548 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4549 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4550 fip
->nbaseclasses
++;
4554 /* Create the vector of fields, and attach it to the type. */
4557 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4558 struct dwarf2_cu
*cu
)
4560 int nfields
= fip
->nfields
;
4562 /* Record the field count, allocate space for the array of fields,
4563 and create blank accessibility bitfields if necessary. */
4564 TYPE_NFIELDS (type
) = nfields
;
4565 TYPE_FIELDS (type
) = (struct field
*)
4566 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4567 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4569 if (fip
->non_public_fields
)
4571 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4573 TYPE_FIELD_PRIVATE_BITS (type
) =
4574 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4575 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4577 TYPE_FIELD_PROTECTED_BITS (type
) =
4578 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4579 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4581 TYPE_FIELD_IGNORE_BITS (type
) =
4582 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4583 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4586 /* If the type has baseclasses, allocate and clear a bit vector for
4587 TYPE_FIELD_VIRTUAL_BITS. */
4588 if (fip
->nbaseclasses
)
4590 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4591 unsigned char *pointer
;
4593 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4594 pointer
= TYPE_ALLOC (type
, num_bytes
);
4595 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4596 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4597 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4600 /* Copy the saved-up fields into the field vector. Start from the head
4601 of the list, adding to the tail of the field array, so that they end
4602 up in the same order in the array in which they were added to the list. */
4603 while (nfields
-- > 0)
4605 struct nextfield
*fieldp
;
4609 fieldp
= fip
->fields
;
4610 fip
->fields
= fieldp
->next
;
4614 fieldp
= fip
->baseclasses
;
4615 fip
->baseclasses
= fieldp
->next
;
4618 TYPE_FIELD (type
, nfields
) = fieldp
->field
;
4619 switch (fieldp
->accessibility
)
4621 case DW_ACCESS_private
:
4622 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4625 case DW_ACCESS_protected
:
4626 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4629 case DW_ACCESS_public
:
4633 /* Unknown accessibility. Complain and treat it as public. */
4635 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4636 fieldp
->accessibility
);
4640 if (nfields
< fip
->nbaseclasses
)
4642 switch (fieldp
->virtuality
)
4644 case DW_VIRTUALITY_virtual
:
4645 case DW_VIRTUALITY_pure_virtual
:
4646 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4653 /* Add a member function to the proper fieldlist. */
4656 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4657 struct type
*type
, struct dwarf2_cu
*cu
)
4659 struct objfile
*objfile
= cu
->objfile
;
4660 struct attribute
*attr
;
4661 struct fnfieldlist
*flp
;
4663 struct fn_field
*fnp
;
4666 struct nextfnfield
*new_fnfield
;
4667 struct type
*this_type
;
4669 /* Get name of member function. */
4670 fieldname
= dwarf2_name (die
, cu
);
4671 if (fieldname
== NULL
)
4674 /* Get the mangled name. */
4675 physname
= dwarf2_linkage_name (die
, cu
);
4677 /* Look up member function name in fieldlist. */
4678 for (i
= 0; i
< fip
->nfnfields
; i
++)
4680 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4684 /* Create new list element if necessary. */
4685 if (i
< fip
->nfnfields
)
4686 flp
= &fip
->fnfieldlists
[i
];
4689 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4691 fip
->fnfieldlists
= (struct fnfieldlist
*)
4692 xrealloc (fip
->fnfieldlists
,
4693 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4694 * sizeof (struct fnfieldlist
));
4695 if (fip
->nfnfields
== 0)
4696 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4698 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4699 flp
->name
= fieldname
;
4705 /* Create a new member function field and chain it to the field list
4707 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4708 make_cleanup (xfree
, new_fnfield
);
4709 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4710 new_fnfield
->next
= flp
->head
;
4711 flp
->head
= new_fnfield
;
4714 /* Fill in the member function field info. */
4715 fnp
= &new_fnfield
->fnfield
;
4716 /* The name is already allocated along with this objfile, so we don't
4717 need to duplicate it for the type. */
4718 fnp
->physname
= physname
? physname
: "";
4719 fnp
->type
= alloc_type (objfile
);
4720 this_type
= read_type_die (die
, cu
);
4721 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4723 int nparams
= TYPE_NFIELDS (this_type
);
4725 /* TYPE is the domain of this method, and THIS_TYPE is the type
4726 of the method itself (TYPE_CODE_METHOD). */
4727 smash_to_method_type (fnp
->type
, type
,
4728 TYPE_TARGET_TYPE (this_type
),
4729 TYPE_FIELDS (this_type
),
4730 TYPE_NFIELDS (this_type
),
4731 TYPE_VARARGS (this_type
));
4733 /* Handle static member functions.
4734 Dwarf2 has no clean way to discern C++ static and non-static
4735 member functions. G++ helps GDB by marking the first
4736 parameter for non-static member functions (which is the
4737 this pointer) as artificial. We obtain this information
4738 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4739 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4740 fnp
->voffset
= VOFFSET_STATIC
;
4743 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4746 /* Get fcontext from DW_AT_containing_type if present. */
4747 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4748 fnp
->fcontext
= die_containing_type (die
, cu
);
4750 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4751 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4753 /* Get accessibility. */
4754 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4757 switch (DW_UNSND (attr
))
4759 case DW_ACCESS_private
:
4760 fnp
->is_private
= 1;
4762 case DW_ACCESS_protected
:
4763 fnp
->is_protected
= 1;
4768 /* Check for artificial methods. */
4769 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4770 if (attr
&& DW_UNSND (attr
) != 0)
4771 fnp
->is_artificial
= 1;
4773 /* Get index in virtual function table if it is a virtual member
4774 function. For GCC, this is an offset in the appropriate
4775 virtual table, as specified by DW_AT_containing_type. For
4776 everyone else, it is an expression to be evaluated relative
4777 to the object address. */
4779 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4780 if (attr
&& fnp
->fcontext
)
4782 /* Support the .debug_loc offsets */
4783 if (attr_form_is_block (attr
))
4785 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4787 else if (attr_form_is_section_offset (attr
))
4789 dwarf2_complex_location_expr_complaint ();
4793 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4799 /* We only support trivial expressions here. This hack will work
4800 for v3 classes, which always start with the vtable pointer. */
4801 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0
4802 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref
)
4804 struct dwarf_block blk
;
4805 blk
.size
= DW_BLOCK (attr
)->size
- 1;
4806 blk
.data
= DW_BLOCK (attr
)->data
+ 1;
4807 fnp
->voffset
= decode_locdesc (&blk
, cu
);
4808 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
4809 dwarf2_complex_location_expr_complaint ();
4811 fnp
->voffset
/= cu
->header
.addr_size
;
4813 fnp
->fcontext
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
4816 dwarf2_complex_location_expr_complaint ();
4820 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
4821 if (attr
&& DW_UNSND (attr
))
4823 /* GCC does this, as of 2008-08-25; PR debug/37237. */
4824 complaint (&symfile_complaints
,
4825 _("Member function \"%s\" (offset %d) is virtual but the vtable offset is not specified"),
4826 fieldname
, die
->offset
);
4827 TYPE_CPLUS_DYNAMIC (type
) = 1;
4832 /* Create the vector of member function fields, and attach it to the type. */
4835 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4836 struct dwarf2_cu
*cu
)
4838 struct fnfieldlist
*flp
;
4839 int total_length
= 0;
4842 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4843 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4844 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4846 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4848 struct nextfnfield
*nfp
= flp
->head
;
4849 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4852 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4853 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4854 fn_flp
->fn_fields
= (struct fn_field
*)
4855 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4856 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4857 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4859 total_length
+= flp
->length
;
4862 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4863 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4866 /* Returns non-zero if NAME is the name of a vtable member in CU's
4867 language, zero otherwise. */
4869 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4871 static const char vptr
[] = "_vptr";
4872 static const char vtable
[] = "vtable";
4874 /* Look for the C++ and Java forms of the vtable. */
4875 if ((cu
->language
== language_java
4876 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4877 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4878 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4884 /* GCC outputs unnamed structures that are really pointers to member
4885 functions, with the ABI-specified layout. If DIE (from CU) describes
4886 such a structure, set its type, and return nonzero. Otherwise return
4889 GCC shouldn't do this; it should just output pointer to member DIEs.
4890 This is GCC PR debug/28767. */
4892 static struct type
*
4893 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
4895 struct objfile
*objfile
= cu
->objfile
;
4897 struct die_info
*pfn_die
, *delta_die
;
4898 struct attribute
*pfn_name
, *delta_name
;
4899 struct type
*pfn_type
, *domain_type
;
4901 /* Check for a structure with no name and two children. */
4902 if (die
->tag
!= DW_TAG_structure_type
4903 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
4904 || die
->child
== NULL
4905 || die
->child
->sibling
== NULL
4906 || (die
->child
->sibling
->sibling
!= NULL
4907 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
4910 /* Check for __pfn and __delta members. */
4911 pfn_die
= die
->child
;
4912 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
4913 if (pfn_die
->tag
!= DW_TAG_member
4915 || DW_STRING (pfn_name
) == NULL
4916 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
4919 delta_die
= pfn_die
->sibling
;
4920 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
4921 if (delta_die
->tag
!= DW_TAG_member
4922 || delta_name
== NULL
4923 || DW_STRING (delta_name
) == NULL
4924 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
4927 /* Find the type of the method. */
4928 pfn_type
= die_type (pfn_die
, cu
);
4929 if (pfn_type
== NULL
4930 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
4931 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
4934 /* Look for the "this" argument. */
4935 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
4936 if (TYPE_NFIELDS (pfn_type
) == 0
4937 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
4940 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
4941 type
= alloc_type (objfile
);
4942 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
4943 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
4944 TYPE_VARARGS (pfn_type
));
4945 type
= lookup_methodptr_type (type
);
4946 return set_die_type (die
, type
, cu
);
4949 /* Called when we find the DIE that starts a structure or union scope
4950 (definition) to process all dies that define the members of the
4953 NOTE: we need to call struct_type regardless of whether or not the
4954 DIE has an at_name attribute, since it might be an anonymous
4955 structure or union. This gets the type entered into our set of
4958 However, if the structure is incomplete (an opaque struct/union)
4959 then suppress creating a symbol table entry for it since gdb only
4960 wants to find the one with the complete definition. Note that if
4961 it is complete, we just call new_symbol, which does it's own
4962 checking about whether the struct/union is anonymous or not (and
4963 suppresses creating a symbol table entry itself). */
4965 static struct type
*
4966 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4968 struct objfile
*objfile
= cu
->objfile
;
4970 struct attribute
*attr
;
4972 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4974 type
= quirk_gcc_member_function_pointer (die
, cu
);
4978 /* If the definition of this type lives in .debug_types, read that type.
4979 Don't follow DW_AT_specification though, that will take us back up
4980 the chain and we want to go down. */
4981 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
4984 struct dwarf2_cu
*type_cu
= cu
;
4985 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
4986 /* We could just recurse on read_structure_type, but we need to call
4987 get_die_type to ensure only one type for this DIE is created.
4988 This is important, for example, because for c++ classes we need
4989 TYPE_NAME set which is only done by new_symbol. Blech. */
4990 type
= read_type_die (type_die
, type_cu
);
4991 return set_die_type (die
, type
, cu
);
4994 type
= alloc_type (objfile
);
4995 INIT_CPLUS_SPECIFIC (type
);
4997 name
= dwarf2_name (die
, cu
);
5000 if (cu
->language
== language_cplus
5001 || cu
->language
== language_java
)
5003 const char *new_prefix
= determine_class_name (die
, cu
);
5004 TYPE_TAG_NAME (type
) = (char *) new_prefix
;
5008 /* The name is already allocated along with this objfile, so
5009 we don't need to duplicate it for the type. */
5010 TYPE_TAG_NAME (type
) = name
;
5014 if (die
->tag
== DW_TAG_structure_type
)
5016 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
5018 else if (die
->tag
== DW_TAG_union_type
)
5020 TYPE_CODE (type
) = TYPE_CODE_UNION
;
5024 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
5026 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
5029 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5032 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5036 TYPE_LENGTH (type
) = 0;
5039 TYPE_STUB_SUPPORTED (type
) = 1;
5040 if (die_is_declaration (die
, cu
))
5041 TYPE_STUB (type
) = 1;
5043 /* We need to add the type field to the die immediately so we don't
5044 infinitely recurse when dealing with pointers to the structure
5045 type within the structure itself. */
5046 set_die_type (die
, type
, cu
);
5048 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
5050 struct field_info fi
;
5051 struct die_info
*child_die
;
5053 memset (&fi
, 0, sizeof (struct field_info
));
5055 child_die
= die
->child
;
5057 while (child_die
&& child_die
->tag
)
5059 if (child_die
->tag
== DW_TAG_member
5060 || child_die
->tag
== DW_TAG_variable
)
5062 /* NOTE: carlton/2002-11-05: A C++ static data member
5063 should be a DW_TAG_member that is a declaration, but
5064 all versions of G++ as of this writing (so through at
5065 least 3.2.1) incorrectly generate DW_TAG_variable
5066 tags for them instead. */
5067 dwarf2_add_field (&fi
, child_die
, cu
);
5069 else if (child_die
->tag
== DW_TAG_subprogram
)
5071 /* C++ member function. */
5072 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
5074 else if (child_die
->tag
== DW_TAG_inheritance
)
5076 /* C++ base class field. */
5077 dwarf2_add_field (&fi
, child_die
, cu
);
5079 child_die
= sibling_die (child_die
);
5082 /* Attach fields and member functions to the type. */
5084 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
5087 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
5089 /* Get the type which refers to the base class (possibly this
5090 class itself) which contains the vtable pointer for the current
5091 class from the DW_AT_containing_type attribute. This use of
5092 DW_AT_containing_type is a GNU extension. */
5094 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
5096 struct type
*t
= die_containing_type (die
, cu
);
5098 TYPE_VPTR_BASETYPE (type
) = t
;
5103 /* Our own class provides vtbl ptr. */
5104 for (i
= TYPE_NFIELDS (t
) - 1;
5105 i
>= TYPE_N_BASECLASSES (t
);
5108 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
5110 if (is_vtable_name (fieldname
, cu
))
5112 TYPE_VPTR_FIELDNO (type
) = i
;
5117 /* Complain if virtual function table field not found. */
5118 if (i
< TYPE_N_BASECLASSES (t
))
5119 complaint (&symfile_complaints
,
5120 _("virtual function table pointer not found when defining class '%s'"),
5121 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
5126 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
5129 else if (cu
->producer
5130 && strncmp (cu
->producer
,
5131 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
5133 /* The IBM XLC compiler does not provide direct indication
5134 of the containing type, but the vtable pointer is
5135 always named __vfp. */
5139 for (i
= TYPE_NFIELDS (type
) - 1;
5140 i
>= TYPE_N_BASECLASSES (type
);
5143 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
5145 TYPE_VPTR_FIELDNO (type
) = i
;
5146 TYPE_VPTR_BASETYPE (type
) = type
;
5154 do_cleanups (back_to
);
5159 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5161 struct objfile
*objfile
= cu
->objfile
;
5162 struct die_info
*child_die
= die
->child
;
5163 struct type
*this_type
;
5165 this_type
= get_die_type (die
, cu
);
5166 if (this_type
== NULL
)
5167 this_type
= read_structure_type (die
, cu
);
5169 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
5170 snapshots) has been known to create a die giving a declaration
5171 for a class that has, as a child, a die giving a definition for a
5172 nested class. So we have to process our children even if the
5173 current die is a declaration. Normally, of course, a declaration
5174 won't have any children at all. */
5176 while (child_die
!= NULL
&& child_die
->tag
)
5178 if (child_die
->tag
== DW_TAG_member
5179 || child_die
->tag
== DW_TAG_variable
5180 || child_die
->tag
== DW_TAG_inheritance
)
5185 process_die (child_die
, cu
);
5187 child_die
= sibling_die (child_die
);
5190 /* Do not consider external references. According to the DWARF standard,
5191 these DIEs are identified by the fact that they have no byte_size
5192 attribute, and a declaration attribute. */
5193 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
5194 || !die_is_declaration (die
, cu
))
5195 new_symbol (die
, this_type
, cu
);
5198 /* Given a DW_AT_enumeration_type die, set its type. We do not
5199 complete the type's fields yet, or create any symbols. */
5201 static struct type
*
5202 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5204 struct objfile
*objfile
= cu
->objfile
;
5206 struct attribute
*attr
;
5209 /* If the definition of this type lives in .debug_types, read that type.
5210 Don't follow DW_AT_specification though, that will take us back up
5211 the chain and we want to go down. */
5212 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
, cu
);
5215 struct dwarf2_cu
*type_cu
= cu
;
5216 struct die_info
*type_die
= follow_die_ref_or_sig (die
, attr
, &type_cu
);
5217 type
= read_type_die (type_die
, type_cu
);
5218 return set_die_type (die
, type
, cu
);
5221 type
= alloc_type (objfile
);
5223 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
5224 name
= dwarf2_full_name (die
, cu
);
5226 TYPE_TAG_NAME (type
) = (char *) name
;
5228 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5231 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5235 TYPE_LENGTH (type
) = 0;
5238 /* The enumeration DIE can be incomplete. In Ada, any type can be
5239 declared as private in the package spec, and then defined only
5240 inside the package body. Such types are known as Taft Amendment
5241 Types. When another package uses such a type, an incomplete DIE
5242 may be generated by the compiler. */
5243 if (die_is_declaration (die
, cu
))
5244 TYPE_STUB (type
) = 1;
5246 return set_die_type (die
, type
, cu
);
5249 /* Determine the name of the type represented by DIE, which should be
5250 a named C++ or Java compound type. Return the name in question,
5251 allocated on the objfile obstack. */
5254 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
5256 const char *new_prefix
= NULL
;
5258 /* If we don't have namespace debug info, guess the name by trying
5259 to demangle the names of members, just like we did in
5260 guess_structure_name. */
5261 if (!processing_has_namespace_info
)
5263 struct die_info
*child
;
5265 for (child
= die
->child
;
5266 child
!= NULL
&& child
->tag
!= 0;
5267 child
= sibling_die (child
))
5269 if (child
->tag
== DW_TAG_subprogram
)
5272 = language_class_name_from_physname (cu
->language_defn
,
5276 if (phys_prefix
!= NULL
)
5279 = obsavestring (phys_prefix
, strlen (phys_prefix
),
5280 &cu
->objfile
->objfile_obstack
);
5281 xfree (phys_prefix
);
5288 if (new_prefix
== NULL
)
5289 new_prefix
= dwarf2_full_name (die
, cu
);
5294 /* Given a pointer to a die which begins an enumeration, process all
5295 the dies that define the members of the enumeration, and create the
5296 symbol for the enumeration type.
5298 NOTE: We reverse the order of the element list. */
5301 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
5303 struct objfile
*objfile
= cu
->objfile
;
5304 struct die_info
*child_die
;
5305 struct field
*fields
;
5308 int unsigned_enum
= 1;
5310 struct type
*this_type
;
5314 this_type
= get_die_type (die
, cu
);
5315 if (this_type
== NULL
)
5316 this_type
= read_enumeration_type (die
, cu
);
5317 if (die
->child
!= NULL
)
5319 child_die
= die
->child
;
5320 while (child_die
&& child_die
->tag
)
5322 if (child_die
->tag
!= DW_TAG_enumerator
)
5324 process_die (child_die
, cu
);
5328 name
= dwarf2_name (child_die
, cu
);
5331 sym
= new_symbol (child_die
, this_type
, cu
);
5332 if (SYMBOL_VALUE (sym
) < 0)
5335 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
5337 fields
= (struct field
*)
5339 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
5340 * sizeof (struct field
));
5343 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
5344 FIELD_TYPE (fields
[num_fields
]) = NULL
;
5345 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
5346 FIELD_BITSIZE (fields
[num_fields
]) = 0;
5352 child_die
= sibling_die (child_die
);
5357 TYPE_NFIELDS (this_type
) = num_fields
;
5358 TYPE_FIELDS (this_type
) = (struct field
*)
5359 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
5360 memcpy (TYPE_FIELDS (this_type
), fields
,
5361 sizeof (struct field
) * num_fields
);
5365 TYPE_UNSIGNED (this_type
) = 1;
5368 new_symbol (die
, this_type
, cu
);
5371 /* Extract all information from a DW_TAG_array_type DIE and put it in
5372 the DIE's type field. For now, this only handles one dimensional
5375 static struct type
*
5376 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5378 struct objfile
*objfile
= cu
->objfile
;
5379 struct die_info
*child_die
;
5380 struct type
*type
= NULL
;
5381 struct type
*element_type
, *range_type
, *index_type
;
5382 struct type
**range_types
= NULL
;
5383 struct attribute
*attr
;
5385 struct cleanup
*back_to
;
5388 element_type
= die_type (die
, cu
);
5390 /* Irix 6.2 native cc creates array types without children for
5391 arrays with unspecified length. */
5392 if (die
->child
== NULL
)
5394 index_type
= objfile_type (objfile
)->builtin_int
;
5395 range_type
= create_range_type (NULL
, index_type
, 0, -1);
5396 type
= create_array_type (NULL
, element_type
, range_type
);
5397 return set_die_type (die
, type
, cu
);
5400 back_to
= make_cleanup (null_cleanup
, NULL
);
5401 child_die
= die
->child
;
5402 while (child_die
&& child_die
->tag
)
5404 if (child_die
->tag
== DW_TAG_subrange_type
)
5406 struct type
*child_type
= read_type_die (child_die
, cu
);
5407 if (child_type
!= NULL
)
5409 /* The range type was succesfully read. Save it for
5410 the array type creation. */
5411 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
5413 range_types
= (struct type
**)
5414 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
5415 * sizeof (struct type
*));
5417 make_cleanup (free_current_contents
, &range_types
);
5419 range_types
[ndim
++] = child_type
;
5422 child_die
= sibling_die (child_die
);
5425 /* Dwarf2 dimensions are output from left to right, create the
5426 necessary array types in backwards order. */
5428 type
= element_type
;
5430 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
5434 type
= create_array_type (NULL
, type
, range_types
[i
++]);
5439 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
5442 /* Understand Dwarf2 support for vector types (like they occur on
5443 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
5444 array type. This is not part of the Dwarf2/3 standard yet, but a
5445 custom vendor extension. The main difference between a regular
5446 array and the vector variant is that vectors are passed by value
5448 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
5450 make_vector_type (type
);
5452 name
= dwarf2_name (die
, cu
);
5454 TYPE_NAME (type
) = name
;
5456 do_cleanups (back_to
);
5458 /* Install the type in the die. */
5459 return set_die_type (die
, type
, cu
);
5462 static enum dwarf_array_dim_ordering
5463 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
5465 struct attribute
*attr
;
5467 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
5469 if (attr
) return DW_SND (attr
);
5472 GNU F77 is a special case, as at 08/2004 array type info is the
5473 opposite order to the dwarf2 specification, but data is still
5474 laid out as per normal fortran.
5476 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
5480 if (cu
->language
== language_fortran
5481 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
5483 return DW_ORD_row_major
;
5486 switch (cu
->language_defn
->la_array_ordering
)
5488 case array_column_major
:
5489 return DW_ORD_col_major
;
5490 case array_row_major
:
5492 return DW_ORD_row_major
;
5496 /* Extract all information from a DW_TAG_set_type DIE and put it in
5497 the DIE's type field. */
5499 static struct type
*
5500 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5502 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
5504 return set_die_type (die
, set_type
, cu
);
5507 /* First cut: install each common block member as a global variable. */
5510 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
5512 struct die_info
*child_die
;
5513 struct attribute
*attr
;
5515 CORE_ADDR base
= (CORE_ADDR
) 0;
5517 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
5520 /* Support the .debug_loc offsets */
5521 if (attr_form_is_block (attr
))
5523 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5525 else if (attr_form_is_section_offset (attr
))
5527 dwarf2_complex_location_expr_complaint ();
5531 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5532 "common block member");
5535 if (die
->child
!= NULL
)
5537 child_die
= die
->child
;
5538 while (child_die
&& child_die
->tag
)
5540 sym
= new_symbol (child_die
, NULL
, cu
);
5541 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5544 CORE_ADDR byte_offset
= 0;
5546 if (attr_form_is_section_offset (attr
))
5547 dwarf2_complex_location_expr_complaint ();
5548 else if (attr_form_is_constant (attr
))
5549 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
5550 else if (attr_form_is_block (attr
))
5551 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
5553 dwarf2_complex_location_expr_complaint ();
5555 SYMBOL_VALUE_ADDRESS (sym
) = base
+ byte_offset
;
5556 add_symbol_to_list (sym
, &global_symbols
);
5558 child_die
= sibling_die (child_die
);
5563 /* Create a type for a C++ namespace. */
5565 static struct type
*
5566 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5568 struct objfile
*objfile
= cu
->objfile
;
5569 const char *previous_prefix
, *name
;
5573 /* For extensions, reuse the type of the original namespace. */
5574 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5576 struct die_info
*ext_die
;
5577 struct dwarf2_cu
*ext_cu
= cu
;
5578 ext_die
= dwarf2_extension (die
, &ext_cu
);
5579 type
= read_type_die (ext_die
, ext_cu
);
5580 return set_die_type (die
, type
, cu
);
5583 name
= namespace_name (die
, &is_anonymous
, cu
);
5585 /* Now build the name of the current namespace. */
5587 previous_prefix
= determine_prefix (die
, cu
);
5588 if (previous_prefix
[0] != '\0')
5589 name
= typename_concat (&objfile
->objfile_obstack
,
5590 previous_prefix
, name
, cu
);
5592 /* Create the type. */
5593 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5595 TYPE_NAME (type
) = (char *) name
;
5596 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5598 set_die_type (die
, type
, cu
);
5603 /* Read a C++ namespace. */
5606 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5608 struct objfile
*objfile
= cu
->objfile
;
5612 /* Add a symbol associated to this if we haven't seen the namespace
5613 before. Also, add a using directive if it's an anonymous
5616 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5620 type
= read_type_die (die
, cu
);
5621 new_symbol (die
, type
, cu
);
5623 name
= namespace_name (die
, &is_anonymous
, cu
);
5626 const char *previous_prefix
= determine_prefix (die
, cu
);
5627 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
));
5631 if (die
->child
!= NULL
)
5633 struct die_info
*child_die
= die
->child
;
5635 while (child_die
&& child_die
->tag
)
5637 process_die (child_die
, cu
);
5638 child_die
= sibling_die (child_die
);
5643 /* Read a Fortran module. */
5646 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5648 struct die_info
*child_die
= die
->child
;
5650 /* FIXME: Support the separate Fortran module namespaces. */
5652 while (child_die
&& child_die
->tag
)
5654 process_die (child_die
, cu
);
5655 child_die
= sibling_die (child_die
);
5659 /* Return the name of the namespace represented by DIE. Set
5660 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5664 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5666 struct die_info
*current_die
;
5667 const char *name
= NULL
;
5669 /* Loop through the extensions until we find a name. */
5671 for (current_die
= die
;
5672 current_die
!= NULL
;
5673 current_die
= dwarf2_extension (die
, &cu
))
5675 name
= dwarf2_name (current_die
, cu
);
5680 /* Is it an anonymous namespace? */
5682 *is_anonymous
= (name
== NULL
);
5684 name
= "(anonymous namespace)";
5689 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5690 the user defined type vector. */
5692 static struct type
*
5693 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5695 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5696 struct comp_unit_head
*cu_header
= &cu
->header
;
5698 struct attribute
*attr_byte_size
;
5699 struct attribute
*attr_address_class
;
5700 int byte_size
, addr_class
;
5702 type
= lookup_pointer_type (die_type (die
, cu
));
5704 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5706 byte_size
= DW_UNSND (attr_byte_size
);
5708 byte_size
= cu_header
->addr_size
;
5710 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5711 if (attr_address_class
)
5712 addr_class
= DW_UNSND (attr_address_class
);
5714 addr_class
= DW_ADDR_none
;
5716 /* If the pointer size or address class is different than the
5717 default, create a type variant marked as such and set the
5718 length accordingly. */
5719 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5721 if (gdbarch_address_class_type_flags_p (gdbarch
))
5725 type_flags
= gdbarch_address_class_type_flags
5726 (gdbarch
, byte_size
, addr_class
);
5727 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5729 type
= make_type_with_address_space (type
, type_flags
);
5731 else if (TYPE_LENGTH (type
) != byte_size
)
5733 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5736 /* Should we also complain about unhandled address classes? */
5740 TYPE_LENGTH (type
) = byte_size
;
5741 return set_die_type (die
, type
, cu
);
5744 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5745 the user defined type vector. */
5747 static struct type
*
5748 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5750 struct objfile
*objfile
= cu
->objfile
;
5752 struct type
*to_type
;
5753 struct type
*domain
;
5755 to_type
= die_type (die
, cu
);
5756 domain
= die_containing_type (die
, cu
);
5758 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5759 type
= lookup_methodptr_type (to_type
);
5761 type
= lookup_memberptr_type (to_type
, domain
);
5763 return set_die_type (die
, type
, cu
);
5766 /* Extract all information from a DW_TAG_reference_type DIE and add to
5767 the user defined type vector. */
5769 static struct type
*
5770 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5772 struct comp_unit_head
*cu_header
= &cu
->header
;
5774 struct attribute
*attr
;
5776 type
= lookup_reference_type (die_type (die
, cu
));
5777 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5780 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5784 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5786 return set_die_type (die
, type
, cu
);
5789 static struct type
*
5790 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5792 struct type
*base_type
, *cv_type
;
5794 base_type
= die_type (die
, cu
);
5795 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5796 return set_die_type (die
, cv_type
, cu
);
5799 static struct type
*
5800 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5802 struct type
*base_type
, *cv_type
;
5804 base_type
= die_type (die
, cu
);
5805 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5806 return set_die_type (die
, cv_type
, cu
);
5809 /* Extract all information from a DW_TAG_string_type DIE and add to
5810 the user defined type vector. It isn't really a user defined type,
5811 but it behaves like one, with other DIE's using an AT_user_def_type
5812 attribute to reference it. */
5814 static struct type
*
5815 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5817 struct objfile
*objfile
= cu
->objfile
;
5818 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5819 struct type
*type
, *range_type
, *index_type
, *char_type
;
5820 struct attribute
*attr
;
5821 unsigned int length
;
5823 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5826 length
= DW_UNSND (attr
);
5830 /* check for the DW_AT_byte_size attribute */
5831 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5834 length
= DW_UNSND (attr
);
5842 index_type
= objfile_type (objfile
)->builtin_int
;
5843 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5844 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5845 type
= create_string_type (NULL
, char_type
, range_type
);
5847 return set_die_type (die
, type
, cu
);
5850 /* Handle DIES due to C code like:
5854 int (*funcp)(int a, long l);
5858 ('funcp' generates a DW_TAG_subroutine_type DIE)
5861 static struct type
*
5862 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5864 struct type
*type
; /* Type that this function returns */
5865 struct type
*ftype
; /* Function that returns above type */
5866 struct attribute
*attr
;
5868 type
= die_type (die
, cu
);
5869 ftype
= lookup_function_type (type
);
5871 /* All functions in C++, Pascal and Java have prototypes. */
5872 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5873 if ((attr
&& (DW_UNSND (attr
) != 0))
5874 || cu
->language
== language_cplus
5875 || cu
->language
== language_java
5876 || cu
->language
== language_pascal
)
5877 TYPE_PROTOTYPED (ftype
) = 1;
5879 /* Store the calling convention in the type if it's available in
5880 the subroutine die. Otherwise set the calling convention to
5881 the default value DW_CC_normal. */
5882 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5883 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5885 if (die
->child
!= NULL
)
5887 struct die_info
*child_die
;
5891 /* Count the number of parameters.
5892 FIXME: GDB currently ignores vararg functions, but knows about
5893 vararg member functions. */
5894 child_die
= die
->child
;
5895 while (child_die
&& child_die
->tag
)
5897 if (child_die
->tag
== DW_TAG_formal_parameter
)
5899 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5900 TYPE_VARARGS (ftype
) = 1;
5901 child_die
= sibling_die (child_die
);
5904 /* Allocate storage for parameters and fill them in. */
5905 TYPE_NFIELDS (ftype
) = nparams
;
5906 TYPE_FIELDS (ftype
) = (struct field
*)
5907 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5909 child_die
= die
->child
;
5910 while (child_die
&& child_die
->tag
)
5912 if (child_die
->tag
== DW_TAG_formal_parameter
)
5914 /* Dwarf2 has no clean way to discern C++ static and non-static
5915 member functions. G++ helps GDB by marking the first
5916 parameter for non-static member functions (which is the
5917 this pointer) as artificial. We pass this information
5918 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5919 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5921 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5923 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5924 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
5927 child_die
= sibling_die (child_die
);
5931 return set_die_type (die
, ftype
, cu
);
5934 static struct type
*
5935 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
5937 struct objfile
*objfile
= cu
->objfile
;
5938 struct attribute
*attr
;
5939 const char *name
= NULL
;
5940 struct type
*this_type
;
5942 name
= dwarf2_full_name (die
, cu
);
5943 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
5944 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
5945 TYPE_NAME (this_type
) = (char *) name
;
5946 set_die_type (die
, this_type
, cu
);
5947 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
5951 /* Find a representation of a given base type and install
5952 it in the TYPE field of the die. */
5954 static struct type
*
5955 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5957 struct objfile
*objfile
= cu
->objfile
;
5959 struct attribute
*attr
;
5960 int encoding
= 0, size
= 0;
5962 enum type_code code
= TYPE_CODE_INT
;
5964 struct type
*target_type
= NULL
;
5966 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5969 encoding
= DW_UNSND (attr
);
5971 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5974 size
= DW_UNSND (attr
);
5976 name
= dwarf2_name (die
, cu
);
5979 complaint (&symfile_complaints
,
5980 _("DW_AT_name missing from DW_TAG_base_type"));
5985 case DW_ATE_address
:
5986 /* Turn DW_ATE_address into a void * pointer. */
5987 code
= TYPE_CODE_PTR
;
5988 type_flags
|= TYPE_FLAG_UNSIGNED
;
5989 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5991 case DW_ATE_boolean
:
5992 code
= TYPE_CODE_BOOL
;
5993 type_flags
|= TYPE_FLAG_UNSIGNED
;
5995 case DW_ATE_complex_float
:
5996 code
= TYPE_CODE_COMPLEX
;
5997 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
5999 case DW_ATE_decimal_float
:
6000 code
= TYPE_CODE_DECFLOAT
;
6003 code
= TYPE_CODE_FLT
;
6007 case DW_ATE_unsigned
:
6008 type_flags
|= TYPE_FLAG_UNSIGNED
;
6010 case DW_ATE_signed_char
:
6011 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6012 || cu
->language
== language_pascal
)
6013 code
= TYPE_CODE_CHAR
;
6015 case DW_ATE_unsigned_char
:
6016 if (cu
->language
== language_ada
|| cu
->language
== language_m2
6017 || cu
->language
== language_pascal
)
6018 code
= TYPE_CODE_CHAR
;
6019 type_flags
|= TYPE_FLAG_UNSIGNED
;
6022 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
6023 dwarf_type_encoding_name (encoding
));
6027 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
6028 TYPE_NAME (type
) = name
;
6029 TYPE_TARGET_TYPE (type
) = target_type
;
6031 if (name
&& strcmp (name
, "char") == 0)
6032 TYPE_NOSIGN (type
) = 1;
6034 return set_die_type (die
, type
, cu
);
6037 /* Read the given DW_AT_subrange DIE. */
6039 static struct type
*
6040 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6042 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
6043 struct type
*base_type
;
6044 struct type
*range_type
;
6045 struct attribute
*attr
;
6050 base_type
= die_type (die
, cu
);
6051 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
6053 complaint (&symfile_complaints
,
6054 _("DW_AT_type missing from DW_TAG_subrange_type"));
6056 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
6057 0, NULL
, cu
->objfile
);
6060 if (cu
->language
== language_fortran
)
6062 /* FORTRAN implies a lower bound of 1, if not given. */
6066 /* FIXME: For variable sized arrays either of these could be
6067 a variable rather than a constant value. We'll allow it,
6068 but we don't know how to handle it. */
6069 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
6071 low
= dwarf2_get_attr_constant_value (attr
, 0);
6073 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
6076 if (attr
->form
== DW_FORM_block1
)
6078 /* GCC encodes arrays with unspecified or dynamic length
6079 with a DW_FORM_block1 attribute.
6080 FIXME: GDB does not yet know how to handle dynamic
6081 arrays properly, treat them as arrays with unspecified
6084 FIXME: jimb/2003-09-22: GDB does not really know
6085 how to handle arrays of unspecified length
6086 either; we just represent them as zero-length
6087 arrays. Choose an appropriate upper bound given
6088 the lower bound we've computed above. */
6092 high
= dwarf2_get_attr_constant_value (attr
, 1);
6095 range_type
= create_range_type (NULL
, base_type
, low
, high
);
6097 name
= dwarf2_name (die
, cu
);
6099 TYPE_NAME (range_type
) = name
;
6101 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
6103 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
6105 return set_die_type (die
, range_type
, cu
);
6108 static struct type
*
6109 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
6113 /* For now, we only support the C meaning of an unspecified type: void. */
6115 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
6116 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
6118 return set_die_type (die
, type
, cu
);
6121 /* Trivial hash function for die_info: the hash value of a DIE
6122 is its offset in .debug_info for this objfile. */
6125 die_hash (const void *item
)
6127 const struct die_info
*die
= item
;
6131 /* Trivial comparison function for die_info structures: two DIEs
6132 are equal if they have the same offset. */
6135 die_eq (const void *item_lhs
, const void *item_rhs
)
6137 const struct die_info
*die_lhs
= item_lhs
;
6138 const struct die_info
*die_rhs
= item_rhs
;
6139 return die_lhs
->offset
== die_rhs
->offset
;
6142 /* Read a whole compilation unit into a linked list of dies. */
6144 static struct die_info
*
6145 read_comp_unit (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6147 struct die_reader_specs reader_specs
;
6149 gdb_assert (cu
->die_hash
== NULL
);
6151 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6155 &cu
->comp_unit_obstack
,
6156 hashtab_obstack_allocate
,
6157 dummy_obstack_deallocate
);
6159 init_cu_die_reader (&reader_specs
, cu
);
6161 return read_die_and_children (&reader_specs
, info_ptr
, &info_ptr
, NULL
);
6164 /* Main entry point for reading a DIE and all children.
6165 Read the DIE and dump it if requested. */
6167 static struct die_info
*
6168 read_die_and_children (const struct die_reader_specs
*reader
,
6170 gdb_byte
**new_info_ptr
,
6171 struct die_info
*parent
)
6173 struct die_info
*result
= read_die_and_children_1 (reader
, info_ptr
,
6174 new_info_ptr
, parent
);
6176 if (dwarf2_die_debug
)
6178 fprintf_unfiltered (gdb_stdlog
,
6179 "\nRead die from %s of %s:\n",
6180 reader
->buffer
== dwarf2_per_objfile
->info
.buffer
6182 : reader
->buffer
== dwarf2_per_objfile
->types
.buffer
6184 : "unknown section",
6185 reader
->abfd
->filename
);
6186 dump_die (result
, dwarf2_die_debug
);
6192 /* Read a single die and all its descendents. Set the die's sibling
6193 field to NULL; set other fields in the die correctly, and set all
6194 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
6195 location of the info_ptr after reading all of those dies. PARENT
6196 is the parent of the die in question. */
6198 static struct die_info
*
6199 read_die_and_children_1 (const struct die_reader_specs
*reader
,
6201 gdb_byte
**new_info_ptr
,
6202 struct die_info
*parent
)
6204 struct die_info
*die
;
6208 cur_ptr
= read_full_die (reader
, &die
, info_ptr
, &has_children
);
6211 *new_info_ptr
= cur_ptr
;
6214 store_in_ref_table (die
, reader
->cu
);
6217 die
->child
= read_die_and_siblings (reader
, cur_ptr
, new_info_ptr
, die
);
6221 *new_info_ptr
= cur_ptr
;
6224 die
->sibling
= NULL
;
6225 die
->parent
= parent
;
6229 /* Read a die, all of its descendents, and all of its siblings; set
6230 all of the fields of all of the dies correctly. Arguments are as
6231 in read_die_and_children. */
6233 static struct die_info
*
6234 read_die_and_siblings (const struct die_reader_specs
*reader
,
6236 gdb_byte
**new_info_ptr
,
6237 struct die_info
*parent
)
6239 struct die_info
*first_die
, *last_sibling
;
6243 first_die
= last_sibling
= NULL
;
6247 struct die_info
*die
6248 = read_die_and_children_1 (reader
, cur_ptr
, &cur_ptr
, parent
);
6252 *new_info_ptr
= cur_ptr
;
6259 last_sibling
->sibling
= die
;
6265 /* Read the die from the .debug_info section buffer. Set DIEP to
6266 point to a newly allocated die with its information, except for its
6267 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6268 whether the die has children or not. */
6271 read_full_die (const struct die_reader_specs
*reader
,
6272 struct die_info
**diep
, gdb_byte
*info_ptr
,
6275 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6276 struct abbrev_info
*abbrev
;
6277 struct die_info
*die
;
6278 struct dwarf2_cu
*cu
= reader
->cu
;
6279 bfd
*abfd
= reader
->abfd
;
6281 offset
= info_ptr
- reader
->buffer
;
6282 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6283 info_ptr
+= bytes_read
;
6291 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6293 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6295 bfd_get_filename (abfd
));
6297 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6298 die
->offset
= offset
;
6299 die
->tag
= abbrev
->tag
;
6300 die
->abbrev
= abbrev_number
;
6302 die
->num_attrs
= abbrev
->num_attrs
;
6304 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6305 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6306 abfd
, info_ptr
, cu
);
6309 *has_children
= abbrev
->has_children
;
6313 /* In DWARF version 2, the description of the debugging information is
6314 stored in a separate .debug_abbrev section. Before we read any
6315 dies from a section we read in all abbreviations and install them
6316 in a hash table. This function also sets flags in CU describing
6317 the data found in the abbrev table. */
6320 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
6322 struct comp_unit_head
*cu_header
= &cu
->header
;
6323 gdb_byte
*abbrev_ptr
;
6324 struct abbrev_info
*cur_abbrev
;
6325 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
6326 unsigned int abbrev_form
, hash_number
;
6327 struct attr_abbrev
*cur_attrs
;
6328 unsigned int allocated_attrs
;
6330 /* Initialize dwarf2 abbrevs */
6331 obstack_init (&cu
->abbrev_obstack
);
6332 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
6334 * sizeof (struct abbrev_info
*)));
6335 memset (cu
->dwarf2_abbrevs
, 0,
6336 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
6338 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
6339 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6340 abbrev_ptr
+= bytes_read
;
6342 allocated_attrs
= ATTR_ALLOC_CHUNK
;
6343 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
6345 /* loop until we reach an abbrev number of 0 */
6346 while (abbrev_number
)
6348 cur_abbrev
= dwarf_alloc_abbrev (cu
);
6350 /* read in abbrev header */
6351 cur_abbrev
->number
= abbrev_number
;
6352 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6353 abbrev_ptr
+= bytes_read
;
6354 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
6357 if (cur_abbrev
->tag
== DW_TAG_namespace
)
6358 cu
->has_namespace_info
= 1;
6360 /* now read in declarations */
6361 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6362 abbrev_ptr
+= bytes_read
;
6363 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6364 abbrev_ptr
+= bytes_read
;
6367 if (cur_abbrev
->num_attrs
== allocated_attrs
)
6369 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
6371 = xrealloc (cur_attrs
, (allocated_attrs
6372 * sizeof (struct attr_abbrev
)));
6375 /* Record whether this compilation unit might have
6376 inter-compilation-unit references. If we don't know what form
6377 this attribute will have, then it might potentially be a
6378 DW_FORM_ref_addr, so we conservatively expect inter-CU
6381 if (abbrev_form
== DW_FORM_ref_addr
6382 || abbrev_form
== DW_FORM_indirect
)
6383 cu
->has_form_ref_addr
= 1;
6385 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
6386 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
6387 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6388 abbrev_ptr
+= bytes_read
;
6389 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6390 abbrev_ptr
+= bytes_read
;
6393 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
6394 (cur_abbrev
->num_attrs
6395 * sizeof (struct attr_abbrev
)));
6396 memcpy (cur_abbrev
->attrs
, cur_attrs
,
6397 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
6399 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
6400 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
6401 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
6403 /* Get next abbreviation.
6404 Under Irix6 the abbreviations for a compilation unit are not
6405 always properly terminated with an abbrev number of 0.
6406 Exit loop if we encounter an abbreviation which we have
6407 already read (which means we are about to read the abbreviations
6408 for the next compile unit) or if the end of the abbreviation
6409 table is reached. */
6410 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
6411 >= dwarf2_per_objfile
->abbrev
.size
)
6413 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
6414 abbrev_ptr
+= bytes_read
;
6415 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
6422 /* Release the memory used by the abbrev table for a compilation unit. */
6425 dwarf2_free_abbrev_table (void *ptr_to_cu
)
6427 struct dwarf2_cu
*cu
= ptr_to_cu
;
6429 obstack_free (&cu
->abbrev_obstack
, NULL
);
6430 cu
->dwarf2_abbrevs
= NULL
;
6433 /* Lookup an abbrev_info structure in the abbrev hash table. */
6435 static struct abbrev_info
*
6436 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
6438 unsigned int hash_number
;
6439 struct abbrev_info
*abbrev
;
6441 hash_number
= number
% ABBREV_HASH_SIZE
;
6442 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
6446 if (abbrev
->number
== number
)
6449 abbrev
= abbrev
->next
;
6454 /* Returns nonzero if TAG represents a type that we might generate a partial
6458 is_type_tag_for_partial (int tag
)
6463 /* Some types that would be reasonable to generate partial symbols for,
6464 that we don't at present. */
6465 case DW_TAG_array_type
:
6466 case DW_TAG_file_type
:
6467 case DW_TAG_ptr_to_member_type
:
6468 case DW_TAG_set_type
:
6469 case DW_TAG_string_type
:
6470 case DW_TAG_subroutine_type
:
6472 case DW_TAG_base_type
:
6473 case DW_TAG_class_type
:
6474 case DW_TAG_interface_type
:
6475 case DW_TAG_enumeration_type
:
6476 case DW_TAG_structure_type
:
6477 case DW_TAG_subrange_type
:
6478 case DW_TAG_typedef
:
6479 case DW_TAG_union_type
:
6486 /* Load all DIEs that are interesting for partial symbols into memory. */
6488 static struct partial_die_info
*
6489 load_partial_dies (bfd
*abfd
, gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6490 int building_psymtab
, struct dwarf2_cu
*cu
)
6492 struct partial_die_info
*part_die
;
6493 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
6494 struct abbrev_info
*abbrev
;
6495 unsigned int bytes_read
;
6496 unsigned int load_all
= 0;
6498 int nesting_level
= 1;
6503 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
6507 = htab_create_alloc_ex (cu
->header
.length
/ 12,
6511 &cu
->comp_unit_obstack
,
6512 hashtab_obstack_allocate
,
6513 dummy_obstack_deallocate
);
6515 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6516 sizeof (struct partial_die_info
));
6520 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
6522 /* A NULL abbrev means the end of a series of children. */
6525 if (--nesting_level
== 0)
6527 /* PART_DIE was probably the last thing allocated on the
6528 comp_unit_obstack, so we could call obstack_free
6529 here. We don't do that because the waste is small,
6530 and will be cleaned up when we're done with this
6531 compilation unit. This way, we're also more robust
6532 against other users of the comp_unit_obstack. */
6535 info_ptr
+= bytes_read
;
6536 last_die
= parent_die
;
6537 parent_die
= parent_die
->die_parent
;
6541 /* Check whether this DIE is interesting enough to save. Normally
6542 we would not be interested in members here, but there may be
6543 later variables referencing them via DW_AT_specification (for
6546 && !is_type_tag_for_partial (abbrev
->tag
)
6547 && abbrev
->tag
!= DW_TAG_enumerator
6548 && abbrev
->tag
!= DW_TAG_subprogram
6549 && abbrev
->tag
!= DW_TAG_lexical_block
6550 && abbrev
->tag
!= DW_TAG_variable
6551 && abbrev
->tag
!= DW_TAG_namespace
6552 && abbrev
->tag
!= DW_TAG_member
)
6554 /* Otherwise we skip to the next sibling, if any. */
6555 info_ptr
= skip_one_die (buffer
, info_ptr
+ bytes_read
, abbrev
, cu
);
6559 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
, abfd
,
6560 buffer
, info_ptr
, cu
);
6562 /* This two-pass algorithm for processing partial symbols has a
6563 high cost in cache pressure. Thus, handle some simple cases
6564 here which cover the majority of C partial symbols. DIEs
6565 which neither have specification tags in them, nor could have
6566 specification tags elsewhere pointing at them, can simply be
6567 processed and discarded.
6569 This segment is also optional; scan_partial_symbols and
6570 add_partial_symbol will handle these DIEs if we chain
6571 them in normally. When compilers which do not emit large
6572 quantities of duplicate debug information are more common,
6573 this code can probably be removed. */
6575 /* Any complete simple types at the top level (pretty much all
6576 of them, for a language without namespaces), can be processed
6578 if (parent_die
== NULL
6579 && part_die
->has_specification
== 0
6580 && part_die
->is_declaration
== 0
6581 && (part_die
->tag
== DW_TAG_typedef
6582 || part_die
->tag
== DW_TAG_base_type
6583 || part_die
->tag
== DW_TAG_subrange_type
))
6585 if (building_psymtab
&& part_die
->name
!= NULL
)
6586 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6587 VAR_DOMAIN
, LOC_TYPEDEF
,
6588 &cu
->objfile
->static_psymbols
,
6589 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6590 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6594 /* If we're at the second level, and we're an enumerator, and
6595 our parent has no specification (meaning possibly lives in a
6596 namespace elsewhere), then we can add the partial symbol now
6597 instead of queueing it. */
6598 if (part_die
->tag
== DW_TAG_enumerator
6599 && parent_die
!= NULL
6600 && parent_die
->die_parent
== NULL
6601 && parent_die
->tag
== DW_TAG_enumeration_type
6602 && parent_die
->has_specification
== 0)
6604 if (part_die
->name
== NULL
)
6605 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6606 else if (building_psymtab
)
6607 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
), 0,
6608 VAR_DOMAIN
, LOC_CONST
,
6609 (cu
->language
== language_cplus
6610 || cu
->language
== language_java
)
6611 ? &cu
->objfile
->global_psymbols
6612 : &cu
->objfile
->static_psymbols
,
6613 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6615 info_ptr
= locate_pdi_sibling (part_die
, buffer
, info_ptr
, abfd
, cu
);
6619 /* We'll save this DIE so link it in. */
6620 part_die
->die_parent
= parent_die
;
6621 part_die
->die_sibling
= NULL
;
6622 part_die
->die_child
= NULL
;
6624 if (last_die
&& last_die
== parent_die
)
6625 last_die
->die_child
= part_die
;
6627 last_die
->die_sibling
= part_die
;
6629 last_die
= part_die
;
6631 if (first_die
== NULL
)
6632 first_die
= part_die
;
6634 /* Maybe add the DIE to the hash table. Not all DIEs that we
6635 find interesting need to be in the hash table, because we
6636 also have the parent/sibling/child chains; only those that we
6637 might refer to by offset later during partial symbol reading.
6639 For now this means things that might have be the target of a
6640 DW_AT_specification, DW_AT_abstract_origin, or
6641 DW_AT_extension. DW_AT_extension will refer only to
6642 namespaces; DW_AT_abstract_origin refers to functions (and
6643 many things under the function DIE, but we do not recurse
6644 into function DIEs during partial symbol reading) and
6645 possibly variables as well; DW_AT_specification refers to
6646 declarations. Declarations ought to have the DW_AT_declaration
6647 flag. It happens that GCC forgets to put it in sometimes, but
6648 only for functions, not for types.
6650 Adding more things than necessary to the hash table is harmless
6651 except for the performance cost. Adding too few will result in
6652 wasted time in find_partial_die, when we reread the compilation
6653 unit with load_all_dies set. */
6656 || abbrev
->tag
== DW_TAG_subprogram
6657 || abbrev
->tag
== DW_TAG_variable
6658 || abbrev
->tag
== DW_TAG_namespace
6659 || part_die
->is_declaration
)
6663 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6664 part_die
->offset
, INSERT
);
6668 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6669 sizeof (struct partial_die_info
));
6671 /* For some DIEs we want to follow their children (if any). For C
6672 we have no reason to follow the children of structures; for other
6673 languages we have to, both so that we can get at method physnames
6674 to infer fully qualified class names, and for DW_AT_specification.
6676 For Ada, we need to scan the children of subprograms and lexical
6677 blocks as well because Ada allows the definition of nested
6678 entities that could be interesting for the debugger, such as
6679 nested subprograms for instance. */
6680 if (last_die
->has_children
6682 || last_die
->tag
== DW_TAG_namespace
6683 || last_die
->tag
== DW_TAG_enumeration_type
6684 || (cu
->language
!= language_c
6685 && (last_die
->tag
== DW_TAG_class_type
6686 || last_die
->tag
== DW_TAG_interface_type
6687 || last_die
->tag
== DW_TAG_structure_type
6688 || last_die
->tag
== DW_TAG_union_type
))
6689 || (cu
->language
== language_ada
6690 && (last_die
->tag
== DW_TAG_subprogram
6691 || last_die
->tag
== DW_TAG_lexical_block
))))
6694 parent_die
= last_die
;
6698 /* Otherwise we skip to the next sibling, if any. */
6699 info_ptr
= locate_pdi_sibling (last_die
, buffer
, info_ptr
, abfd
, cu
);
6701 /* Back to the top, do it again. */
6705 /* Read a minimal amount of information into the minimal die structure. */
6708 read_partial_die (struct partial_die_info
*part_die
,
6709 struct abbrev_info
*abbrev
,
6710 unsigned int abbrev_len
, bfd
*abfd
,
6711 gdb_byte
*buffer
, gdb_byte
*info_ptr
,
6712 struct dwarf2_cu
*cu
)
6714 unsigned int bytes_read
, i
;
6715 struct attribute attr
;
6716 int has_low_pc_attr
= 0;
6717 int has_high_pc_attr
= 0;
6719 memset (part_die
, 0, sizeof (struct partial_die_info
));
6721 part_die
->offset
= info_ptr
- buffer
;
6723 info_ptr
+= abbrev_len
;
6728 part_die
->tag
= abbrev
->tag
;
6729 part_die
->has_children
= abbrev
->has_children
;
6731 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6733 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6735 /* Store the data if it is of an attribute we want to keep in a
6736 partial symbol table. */
6740 switch (part_die
->tag
)
6742 case DW_TAG_compile_unit
:
6743 case DW_TAG_type_unit
:
6744 /* Compilation units have a DW_AT_name that is a filename, not
6745 a source language identifier. */
6746 case DW_TAG_enumeration_type
:
6747 case DW_TAG_enumerator
:
6748 /* These tags always have simple identifiers already; no need
6749 to canonicalize them. */
6750 part_die
->name
= DW_STRING (&attr
);
6754 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6755 &cu
->comp_unit_obstack
);
6759 case DW_AT_MIPS_linkage_name
:
6760 part_die
->name
= DW_STRING (&attr
);
6763 has_low_pc_attr
= 1;
6764 part_die
->lowpc
= DW_ADDR (&attr
);
6767 has_high_pc_attr
= 1;
6768 part_die
->highpc
= DW_ADDR (&attr
);
6770 case DW_AT_location
:
6771 /* Support the .debug_loc offsets */
6772 if (attr_form_is_block (&attr
))
6774 part_die
->locdesc
= DW_BLOCK (&attr
);
6776 else if (attr_form_is_section_offset (&attr
))
6778 dwarf2_complex_location_expr_complaint ();
6782 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6783 "partial symbol information");
6786 case DW_AT_external
:
6787 part_die
->is_external
= DW_UNSND (&attr
);
6789 case DW_AT_declaration
:
6790 part_die
->is_declaration
= DW_UNSND (&attr
);
6793 part_die
->has_type
= 1;
6795 case DW_AT_abstract_origin
:
6796 case DW_AT_specification
:
6797 case DW_AT_extension
:
6798 part_die
->has_specification
= 1;
6799 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6802 /* Ignore absolute siblings, they might point outside of
6803 the current compile unit. */
6804 if (attr
.form
== DW_FORM_ref_addr
)
6805 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6807 part_die
->sibling
= buffer
+ dwarf2_get_ref_die_offset (&attr
);
6809 case DW_AT_byte_size
:
6810 part_die
->has_byte_size
= 1;
6812 case DW_AT_calling_convention
:
6813 /* DWARF doesn't provide a way to identify a program's source-level
6814 entry point. DW_AT_calling_convention attributes are only meant
6815 to describe functions' calling conventions.
6817 However, because it's a necessary piece of information in
6818 Fortran, and because DW_CC_program is the only piece of debugging
6819 information whose definition refers to a 'main program' at all,
6820 several compilers have begun marking Fortran main programs with
6821 DW_CC_program --- even when those functions use the standard
6822 calling conventions.
6824 So until DWARF specifies a way to provide this information and
6825 compilers pick up the new representation, we'll support this
6827 if (DW_UNSND (&attr
) == DW_CC_program
6828 && cu
->language
== language_fortran
)
6829 set_main_name (part_die
->name
);
6836 /* When using the GNU linker, .gnu.linkonce. sections are used to
6837 eliminate duplicate copies of functions and vtables and such.
6838 The linker will arbitrarily choose one and discard the others.
6839 The AT_*_pc values for such functions refer to local labels in
6840 these sections. If the section from that file was discarded, the
6841 labels are not in the output, so the relocs get a value of 0.
6842 If this is a discarded function, mark the pc bounds as invalid,
6843 so that GDB will ignore it. */
6844 if (has_low_pc_attr
&& has_high_pc_attr
6845 && part_die
->lowpc
< part_die
->highpc
6846 && (part_die
->lowpc
!= 0
6847 || dwarf2_per_objfile
->has_section_at_zero
))
6848 part_die
->has_pc_info
= 1;
6853 /* Find a cached partial DIE at OFFSET in CU. */
6855 static struct partial_die_info
*
6856 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6858 struct partial_die_info
*lookup_die
= NULL
;
6859 struct partial_die_info part_die
;
6861 part_die
.offset
= offset
;
6862 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6867 /* Find a partial DIE at OFFSET, which may or may not be in CU,
6868 except in the case of .debug_types DIEs which do not reference
6869 outside their CU (they do however referencing other types via
6872 static struct partial_die_info
*
6873 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6875 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6876 struct partial_die_info
*pd
= NULL
;
6878 if (cu
->per_cu
->from_debug_types
)
6880 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6886 if (offset_in_cu_p (&cu
->header
, offset
))
6888 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6893 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6895 if (per_cu
->cu
== NULL
)
6897 load_partial_comp_unit (per_cu
, cu
->objfile
);
6898 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6899 dwarf2_per_objfile
->read_in_chain
= per_cu
;
6902 per_cu
->cu
->last_used
= 0;
6903 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6905 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
6907 struct cleanup
*back_to
;
6908 struct partial_die_info comp_unit_die
;
6909 struct abbrev_info
*abbrev
;
6910 unsigned int bytes_read
;
6913 per_cu
->load_all_dies
= 1;
6915 /* Re-read the DIEs. */
6916 back_to
= make_cleanup (null_cleanup
, 0);
6917 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6919 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6920 make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6922 info_ptr
= (dwarf2_per_objfile
->info
.buffer
6923 + per_cu
->cu
->header
.offset
6924 + per_cu
->cu
->header
.first_die_offset
);
6925 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6926 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6927 per_cu
->cu
->objfile
->obfd
,
6928 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6930 if (comp_unit_die
.has_children
)
6931 load_partial_dies (per_cu
->cu
->objfile
->obfd
,
6932 dwarf2_per_objfile
->info
.buffer
, info_ptr
,
6934 do_cleanups (back_to
);
6936 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6942 internal_error (__FILE__
, __LINE__
,
6943 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6944 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6948 /* Adjust PART_DIE before generating a symbol for it. This function
6949 may set the is_external flag or change the DIE's name. */
6952 fixup_partial_die (struct partial_die_info
*part_die
,
6953 struct dwarf2_cu
*cu
)
6955 /* If we found a reference attribute and the DIE has no name, try
6956 to find a name in the referred to DIE. */
6958 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6960 struct partial_die_info
*spec_die
;
6962 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6964 fixup_partial_die (spec_die
, cu
);
6968 part_die
->name
= spec_die
->name
;
6970 /* Copy DW_AT_external attribute if it is set. */
6971 if (spec_die
->is_external
)
6972 part_die
->is_external
= spec_die
->is_external
;
6976 /* Set default names for some unnamed DIEs. */
6977 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6978 || part_die
->tag
== DW_TAG_class_type
))
6979 part_die
->name
= "(anonymous class)";
6981 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6982 part_die
->name
= "(anonymous namespace)";
6984 if (part_die
->tag
== DW_TAG_structure_type
6985 || part_die
->tag
== DW_TAG_class_type
6986 || part_die
->tag
== DW_TAG_union_type
)
6987 guess_structure_name (part_die
, cu
);
6990 /* Read an attribute value described by an attribute form. */
6993 read_attribute_value (struct attribute
*attr
, unsigned form
,
6994 bfd
*abfd
, gdb_byte
*info_ptr
,
6995 struct dwarf2_cu
*cu
)
6997 struct comp_unit_head
*cu_header
= &cu
->header
;
6998 unsigned int bytes_read
;
6999 struct dwarf_block
*blk
;
7005 case DW_FORM_ref_addr
:
7006 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
7007 info_ptr
+= bytes_read
;
7009 case DW_FORM_block2
:
7010 blk
= dwarf_alloc_block (cu
);
7011 blk
->size
= read_2_bytes (abfd
, info_ptr
);
7013 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7014 info_ptr
+= blk
->size
;
7015 DW_BLOCK (attr
) = blk
;
7017 case DW_FORM_block4
:
7018 blk
= dwarf_alloc_block (cu
);
7019 blk
->size
= read_4_bytes (abfd
, info_ptr
);
7021 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7022 info_ptr
+= blk
->size
;
7023 DW_BLOCK (attr
) = blk
;
7026 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
7030 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
7034 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
7037 case DW_FORM_string
:
7038 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
7039 DW_STRING_IS_CANONICAL (attr
) = 0;
7040 info_ptr
+= bytes_read
;
7043 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
7045 DW_STRING_IS_CANONICAL (attr
) = 0;
7046 info_ptr
+= bytes_read
;
7049 blk
= dwarf_alloc_block (cu
);
7050 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7051 info_ptr
+= bytes_read
;
7052 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7053 info_ptr
+= blk
->size
;
7054 DW_BLOCK (attr
) = blk
;
7056 case DW_FORM_block1
:
7057 blk
= dwarf_alloc_block (cu
);
7058 blk
->size
= read_1_byte (abfd
, info_ptr
);
7060 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
7061 info_ptr
+= blk
->size
;
7062 DW_BLOCK (attr
) = blk
;
7065 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7069 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
7073 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
7074 info_ptr
+= bytes_read
;
7077 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7078 info_ptr
+= bytes_read
;
7081 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
7085 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
7089 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
7093 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
7097 /* Convert the signature to something we can record in DW_UNSND
7099 NOTE: This is NULL if the type wasn't found. */
7100 DW_SIGNATURED_TYPE (attr
) =
7101 lookup_signatured_type (cu
->objfile
, read_8_bytes (abfd
, info_ptr
));
7104 case DW_FORM_ref_udata
:
7105 DW_ADDR (attr
) = (cu
->header
.offset
7106 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
7107 info_ptr
+= bytes_read
;
7109 case DW_FORM_indirect
:
7110 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
7111 info_ptr
+= bytes_read
;
7112 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
7115 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
7116 dwarf_form_name (form
),
7117 bfd_get_filename (abfd
));
7120 /* We have seen instances where the compiler tried to emit a byte
7121 size attribute of -1 which ended up being encoded as an unsigned
7122 0xffffffff. Although 0xffffffff is technically a valid size value,
7123 an object of this size seems pretty unlikely so we can relatively
7124 safely treat these cases as if the size attribute was invalid and
7125 treat them as zero by default. */
7126 if (attr
->name
== DW_AT_byte_size
7127 && form
== DW_FORM_data4
7128 && DW_UNSND (attr
) >= 0xffffffff)
7131 (&symfile_complaints
,
7132 _("Suspicious DW_AT_byte_size value treated as zero instead of 0x%lx"),
7134 DW_UNSND (attr
) = 0;
7140 /* Read an attribute described by an abbreviated attribute. */
7143 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
7144 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
7146 attr
->name
= abbrev
->name
;
7147 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
7150 /* read dwarf information from a buffer */
7153 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
7155 return bfd_get_8 (abfd
, buf
);
7159 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
7161 return bfd_get_signed_8 (abfd
, buf
);
7165 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
7167 return bfd_get_16 (abfd
, buf
);
7171 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7173 return bfd_get_signed_16 (abfd
, buf
);
7177 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
7179 return bfd_get_32 (abfd
, buf
);
7183 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
7185 return bfd_get_signed_32 (abfd
, buf
);
7189 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
7191 return bfd_get_64 (abfd
, buf
);
7195 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
7196 unsigned int *bytes_read
)
7198 struct comp_unit_head
*cu_header
= &cu
->header
;
7199 CORE_ADDR retval
= 0;
7201 if (cu_header
->signed_addr_p
)
7203 switch (cu_header
->addr_size
)
7206 retval
= bfd_get_signed_16 (abfd
, buf
);
7209 retval
= bfd_get_signed_32 (abfd
, buf
);
7212 retval
= bfd_get_signed_64 (abfd
, buf
);
7215 internal_error (__FILE__
, __LINE__
,
7216 _("read_address: bad switch, signed [in module %s]"),
7217 bfd_get_filename (abfd
));
7222 switch (cu_header
->addr_size
)
7225 retval
= bfd_get_16 (abfd
, buf
);
7228 retval
= bfd_get_32 (abfd
, buf
);
7231 retval
= bfd_get_64 (abfd
, buf
);
7234 internal_error (__FILE__
, __LINE__
,
7235 _("read_address: bad switch, unsigned [in module %s]"),
7236 bfd_get_filename (abfd
));
7240 *bytes_read
= cu_header
->addr_size
;
7244 /* Read the initial length from a section. The (draft) DWARF 3
7245 specification allows the initial length to take up either 4 bytes
7246 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
7247 bytes describe the length and all offsets will be 8 bytes in length
7250 An older, non-standard 64-bit format is also handled by this
7251 function. The older format in question stores the initial length
7252 as an 8-byte quantity without an escape value. Lengths greater
7253 than 2^32 aren't very common which means that the initial 4 bytes
7254 is almost always zero. Since a length value of zero doesn't make
7255 sense for the 32-bit format, this initial zero can be considered to
7256 be an escape value which indicates the presence of the older 64-bit
7257 format. As written, the code can't detect (old format) lengths
7258 greater than 4GB. If it becomes necessary to handle lengths
7259 somewhat larger than 4GB, we could allow other small values (such
7260 as the non-sensical values of 1, 2, and 3) to also be used as
7261 escape values indicating the presence of the old format.
7263 The value returned via bytes_read should be used to increment the
7264 relevant pointer after calling read_initial_length().
7266 [ Note: read_initial_length() and read_offset() are based on the
7267 document entitled "DWARF Debugging Information Format", revision
7268 3, draft 8, dated November 19, 2001. This document was obtained
7271 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
7273 This document is only a draft and is subject to change. (So beware.)
7275 Details regarding the older, non-standard 64-bit format were
7276 determined empirically by examining 64-bit ELF files produced by
7277 the SGI toolchain on an IRIX 6.5 machine.
7279 - Kevin, July 16, 2002
7283 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
7285 LONGEST length
= bfd_get_32 (abfd
, buf
);
7287 if (length
== 0xffffffff)
7289 length
= bfd_get_64 (abfd
, buf
+ 4);
7292 else if (length
== 0)
7294 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
7295 length
= bfd_get_64 (abfd
, buf
);
7306 /* Cover function for read_initial_length.
7307 Returns the length of the object at BUF, and stores the size of the
7308 initial length in *BYTES_READ and stores the size that offsets will be in
7310 If the initial length size is not equivalent to that specified in
7311 CU_HEADER then issue a complaint.
7312 This is useful when reading non-comp-unit headers. */
7315 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
7316 const struct comp_unit_head
*cu_header
,
7317 unsigned int *bytes_read
,
7318 unsigned int *offset_size
)
7320 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
7322 gdb_assert (cu_header
->initial_length_size
== 4
7323 || cu_header
->initial_length_size
== 8
7324 || cu_header
->initial_length_size
== 12);
7326 if (cu_header
->initial_length_size
!= *bytes_read
)
7327 complaint (&symfile_complaints
,
7328 _("intermixed 32-bit and 64-bit DWARF sections"));
7330 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
7334 /* Read an offset from the data stream. The size of the offset is
7335 given by cu_header->offset_size. */
7338 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
7339 unsigned int *bytes_read
)
7341 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
7342 *bytes_read
= cu_header
->offset_size
;
7346 /* Read an offset from the data stream. */
7349 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
7353 switch (offset_size
)
7356 retval
= bfd_get_32 (abfd
, buf
);
7359 retval
= bfd_get_64 (abfd
, buf
);
7362 internal_error (__FILE__
, __LINE__
,
7363 _("read_offset_1: bad switch [in module %s]"),
7364 bfd_get_filename (abfd
));
7371 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
7373 /* If the size of a host char is 8 bits, we can return a pointer
7374 to the buffer, otherwise we have to copy the data to a buffer
7375 allocated on the temporary obstack. */
7376 gdb_assert (HOST_CHAR_BIT
== 8);
7381 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7383 /* If the size of a host char is 8 bits, we can return a pointer
7384 to the string, otherwise we have to copy the string to a buffer
7385 allocated on the temporary obstack. */
7386 gdb_assert (HOST_CHAR_BIT
== 8);
7389 *bytes_read_ptr
= 1;
7392 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
7393 return (char *) buf
;
7397 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
7398 const struct comp_unit_head
*cu_header
,
7399 unsigned int *bytes_read_ptr
)
7401 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
7403 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
7405 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
7406 bfd_get_filename (abfd
));
7409 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
7411 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
7412 bfd_get_filename (abfd
));
7415 gdb_assert (HOST_CHAR_BIT
== 8);
7416 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
7418 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
7421 static unsigned long
7422 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7424 unsigned long result
;
7425 unsigned int num_read
;
7435 byte
= bfd_get_8 (abfd
, buf
);
7438 result
|= ((unsigned long)(byte
& 127) << shift
);
7439 if ((byte
& 128) == 0)
7445 *bytes_read_ptr
= num_read
;
7450 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
7453 int i
, shift
, num_read
;
7462 byte
= bfd_get_8 (abfd
, buf
);
7465 result
|= ((long)(byte
& 127) << shift
);
7467 if ((byte
& 128) == 0)
7472 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
7473 result
|= -(((long)1) << shift
);
7474 *bytes_read_ptr
= num_read
;
7478 /* Return a pointer to just past the end of an LEB128 number in BUF. */
7481 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
7487 byte
= bfd_get_8 (abfd
, buf
);
7489 if ((byte
& 128) == 0)
7495 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
7502 cu
->language
= language_c
;
7504 case DW_LANG_C_plus_plus
:
7505 cu
->language
= language_cplus
;
7507 case DW_LANG_Fortran77
:
7508 case DW_LANG_Fortran90
:
7509 case DW_LANG_Fortran95
:
7510 cu
->language
= language_fortran
;
7512 case DW_LANG_Mips_Assembler
:
7513 cu
->language
= language_asm
;
7516 cu
->language
= language_java
;
7520 cu
->language
= language_ada
;
7522 case DW_LANG_Modula2
:
7523 cu
->language
= language_m2
;
7525 case DW_LANG_Pascal83
:
7526 cu
->language
= language_pascal
;
7529 cu
->language
= language_objc
;
7531 case DW_LANG_Cobol74
:
7532 case DW_LANG_Cobol85
:
7534 cu
->language
= language_minimal
;
7537 cu
->language_defn
= language_def (cu
->language
);
7540 /* Return the named attribute or NULL if not there. */
7542 static struct attribute
*
7543 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7546 struct attribute
*spec
= NULL
;
7548 for (i
= 0; i
< die
->num_attrs
; ++i
)
7550 if (die
->attrs
[i
].name
== name
)
7551 return &die
->attrs
[i
];
7552 if (die
->attrs
[i
].name
== DW_AT_specification
7553 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7554 spec
= &die
->attrs
[i
];
7559 die
= follow_die_ref (die
, spec
, &cu
);
7560 return dwarf2_attr (die
, name
, cu
);
7566 /* Return the named attribute or NULL if not there,
7567 but do not follow DW_AT_specification, etc.
7568 This is for use in contexts where we're reading .debug_types dies.
7569 Following DW_AT_specification, DW_AT_abstract_origin will take us
7570 back up the chain, and we want to go down. */
7572 static struct attribute
*
7573 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
,
7574 struct dwarf2_cu
*cu
)
7578 for (i
= 0; i
< die
->num_attrs
; ++i
)
7579 if (die
->attrs
[i
].name
== name
)
7580 return &die
->attrs
[i
];
7585 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7586 and holds a non-zero value. This function should only be used for
7587 DW_FORM_flag attributes. */
7590 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7592 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7594 return (attr
&& DW_UNSND (attr
));
7598 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7600 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7601 which value is non-zero. However, we have to be careful with
7602 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7603 (via dwarf2_flag_true_p) follows this attribute. So we may
7604 end up accidently finding a declaration attribute that belongs
7605 to a different DIE referenced by the specification attribute,
7606 even though the given DIE does not have a declaration attribute. */
7607 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7608 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7611 /* Return the die giving the specification for DIE, if there is
7612 one. *SPEC_CU is the CU containing DIE on input, and the CU
7613 containing the return value on output. If there is no
7614 specification, but there is an abstract origin, that is
7617 static struct die_info
*
7618 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7620 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7623 if (spec_attr
== NULL
)
7624 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7626 if (spec_attr
== NULL
)
7629 return follow_die_ref (die
, spec_attr
, spec_cu
);
7632 /* Free the line_header structure *LH, and any arrays and strings it
7635 free_line_header (struct line_header
*lh
)
7637 if (lh
->standard_opcode_lengths
)
7638 xfree (lh
->standard_opcode_lengths
);
7640 /* Remember that all the lh->file_names[i].name pointers are
7641 pointers into debug_line_buffer, and don't need to be freed. */
7643 xfree (lh
->file_names
);
7645 /* Similarly for the include directory names. */
7646 if (lh
->include_dirs
)
7647 xfree (lh
->include_dirs
);
7653 /* Add an entry to LH's include directory table. */
7655 add_include_dir (struct line_header
*lh
, char *include_dir
)
7657 /* Grow the array if necessary. */
7658 if (lh
->include_dirs_size
== 0)
7660 lh
->include_dirs_size
= 1; /* for testing */
7661 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7662 * sizeof (*lh
->include_dirs
));
7664 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7666 lh
->include_dirs_size
*= 2;
7667 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7668 (lh
->include_dirs_size
7669 * sizeof (*lh
->include_dirs
)));
7672 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7676 /* Add an entry to LH's file name table. */
7678 add_file_name (struct line_header
*lh
,
7680 unsigned int dir_index
,
7681 unsigned int mod_time
,
7682 unsigned int length
)
7684 struct file_entry
*fe
;
7686 /* Grow the array if necessary. */
7687 if (lh
->file_names_size
== 0)
7689 lh
->file_names_size
= 1; /* for testing */
7690 lh
->file_names
= xmalloc (lh
->file_names_size
7691 * sizeof (*lh
->file_names
));
7693 else if (lh
->num_file_names
>= lh
->file_names_size
)
7695 lh
->file_names_size
*= 2;
7696 lh
->file_names
= xrealloc (lh
->file_names
,
7697 (lh
->file_names_size
7698 * sizeof (*lh
->file_names
)));
7701 fe
= &lh
->file_names
[lh
->num_file_names
++];
7703 fe
->dir_index
= dir_index
;
7704 fe
->mod_time
= mod_time
;
7705 fe
->length
= length
;
7711 /* Read the statement program header starting at OFFSET in
7712 .debug_line, according to the endianness of ABFD. Return a pointer
7713 to a struct line_header, allocated using xmalloc.
7715 NOTE: the strings in the include directory and file name tables of
7716 the returned object point into debug_line_buffer, and must not be
7718 static struct line_header
*
7719 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7720 struct dwarf2_cu
*cu
)
7722 struct cleanup
*back_to
;
7723 struct line_header
*lh
;
7725 unsigned int bytes_read
, offset_size
;
7727 char *cur_dir
, *cur_file
;
7729 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7731 complaint (&symfile_complaints
, _("missing .debug_line section"));
7735 /* Make sure that at least there's room for the total_length field.
7736 That could be 12 bytes long, but we're just going to fudge that. */
7737 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7739 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7743 lh
= xmalloc (sizeof (*lh
));
7744 memset (lh
, 0, sizeof (*lh
));
7745 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7748 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7750 /* Read in the header. */
7752 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7753 &bytes_read
, &offset_size
);
7754 line_ptr
+= bytes_read
;
7755 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7756 + dwarf2_per_objfile
->line
.size
))
7758 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7761 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7762 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7764 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7765 line_ptr
+= offset_size
;
7766 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7768 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7770 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7772 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7774 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7776 lh
->standard_opcode_lengths
7777 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7779 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7780 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7782 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7786 /* Read directory table. */
7787 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7789 line_ptr
+= bytes_read
;
7790 add_include_dir (lh
, cur_dir
);
7792 line_ptr
+= bytes_read
;
7794 /* Read file name table. */
7795 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7797 unsigned int dir_index
, mod_time
, length
;
7799 line_ptr
+= bytes_read
;
7800 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7801 line_ptr
+= bytes_read
;
7802 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7803 line_ptr
+= bytes_read
;
7804 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7805 line_ptr
+= bytes_read
;
7807 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7809 line_ptr
+= bytes_read
;
7810 lh
->statement_program_start
= line_ptr
;
7812 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7813 + dwarf2_per_objfile
->line
.size
))
7814 complaint (&symfile_complaints
,
7815 _("line number info header doesn't fit in `.debug_line' section"));
7817 discard_cleanups (back_to
);
7821 /* This function exists to work around a bug in certain compilers
7822 (particularly GCC 2.95), in which the first line number marker of a
7823 function does not show up until after the prologue, right before
7824 the second line number marker. This function shifts ADDRESS down
7825 to the beginning of the function if necessary, and is called on
7826 addresses passed to record_line. */
7829 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7831 struct function_range
*fn
;
7833 /* Find the function_range containing address. */
7838 cu
->cached_fn
= cu
->first_fn
;
7842 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7848 while (fn
&& fn
!= cu
->cached_fn
)
7849 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7859 if (address
!= fn
->lowpc
)
7860 complaint (&symfile_complaints
,
7861 _("misplaced first line number at 0x%lx for '%s'"),
7862 (unsigned long) address
, fn
->name
);
7867 /* Decode the Line Number Program (LNP) for the given line_header
7868 structure and CU. The actual information extracted and the type
7869 of structures created from the LNP depends on the value of PST.
7871 1. If PST is NULL, then this procedure uses the data from the program
7872 to create all necessary symbol tables, and their linetables.
7873 The compilation directory of the file is passed in COMP_DIR,
7874 and must not be NULL.
7876 2. If PST is not NULL, this procedure reads the program to determine
7877 the list of files included by the unit represented by PST, and
7878 builds all the associated partial symbol tables. In this case,
7879 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7880 is not used to compute the full name of the symtab, and therefore
7881 omitting it when building the partial symtab does not introduce
7882 the potential for inconsistency - a partial symtab and its associated
7883 symbtab having a different fullname -). */
7886 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
7887 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
7889 gdb_byte
*line_ptr
, *extended_end
;
7891 unsigned int bytes_read
, extended_len
;
7892 unsigned char op_code
, extended_op
, adj_opcode
;
7894 struct objfile
*objfile
= cu
->objfile
;
7895 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7896 const int decode_for_pst_p
= (pst
!= NULL
);
7897 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
7899 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7901 line_ptr
= lh
->statement_program_start
;
7902 line_end
= lh
->statement_program_end
;
7904 /* Read the statement sequences until there's nothing left. */
7905 while (line_ptr
< line_end
)
7907 /* state machine registers */
7908 CORE_ADDR address
= 0;
7909 unsigned int file
= 1;
7910 unsigned int line
= 1;
7911 unsigned int column
= 0;
7912 int is_stmt
= lh
->default_is_stmt
;
7913 int basic_block
= 0;
7914 int end_sequence
= 0;
7917 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7919 /* Start a subfile for the current file of the state machine. */
7920 /* lh->include_dirs and lh->file_names are 0-based, but the
7921 directory and file name numbers in the statement program
7923 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7927 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7929 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7932 /* Decode the table. */
7933 while (!end_sequence
)
7935 op_code
= read_1_byte (abfd
, line_ptr
);
7937 if (line_ptr
> line_end
)
7939 dwarf2_debug_line_missing_end_sequence_complaint ();
7943 if (op_code
>= lh
->opcode_base
)
7945 /* Special operand. */
7946 adj_opcode
= op_code
- lh
->opcode_base
;
7947 address
+= (adj_opcode
/ lh
->line_range
)
7948 * lh
->minimum_instruction_length
;
7949 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7950 if (lh
->num_file_names
< file
|| file
== 0)
7951 dwarf2_debug_line_missing_file_complaint ();
7954 lh
->file_names
[file
- 1].included_p
= 1;
7955 if (!decode_for_pst_p
&& is_stmt
)
7957 if (last_subfile
!= current_subfile
)
7959 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7961 record_line (last_subfile
, 0, addr
);
7962 last_subfile
= current_subfile
;
7964 /* Append row to matrix using current values. */
7965 addr
= check_cu_functions (address
, cu
);
7966 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7967 record_line (current_subfile
, line
, addr
);
7972 else switch (op_code
)
7974 case DW_LNS_extended_op
:
7975 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7976 line_ptr
+= bytes_read
;
7977 extended_end
= line_ptr
+ extended_len
;
7978 extended_op
= read_1_byte (abfd
, line_ptr
);
7980 switch (extended_op
)
7982 case DW_LNE_end_sequence
:
7985 case DW_LNE_set_address
:
7986 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7987 line_ptr
+= bytes_read
;
7988 address
+= baseaddr
;
7990 case DW_LNE_define_file
:
7993 unsigned int dir_index
, mod_time
, length
;
7995 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
7996 line_ptr
+= bytes_read
;
7998 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7999 line_ptr
+= bytes_read
;
8001 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8002 line_ptr
+= bytes_read
;
8004 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8005 line_ptr
+= bytes_read
;
8006 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
8009 case DW_LNE_set_discriminator
:
8010 /* The discriminator is not interesting to the debugger;
8012 line_ptr
= extended_end
;
8015 complaint (&symfile_complaints
,
8016 _("mangled .debug_line section"));
8019 /* Make sure that we parsed the extended op correctly. If e.g.
8020 we expected a different address size than the producer used,
8021 we may have read the wrong number of bytes. */
8022 if (line_ptr
!= extended_end
)
8024 complaint (&symfile_complaints
,
8025 _("mangled .debug_line section"));
8030 if (lh
->num_file_names
< file
|| file
== 0)
8031 dwarf2_debug_line_missing_file_complaint ();
8034 lh
->file_names
[file
- 1].included_p
= 1;
8035 if (!decode_for_pst_p
&& is_stmt
)
8037 if (last_subfile
!= current_subfile
)
8039 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8041 record_line (last_subfile
, 0, addr
);
8042 last_subfile
= current_subfile
;
8044 addr
= check_cu_functions (address
, cu
);
8045 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
8046 record_line (current_subfile
, line
, addr
);
8051 case DW_LNS_advance_pc
:
8052 address
+= lh
->minimum_instruction_length
8053 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8054 line_ptr
+= bytes_read
;
8056 case DW_LNS_advance_line
:
8057 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
8058 line_ptr
+= bytes_read
;
8060 case DW_LNS_set_file
:
8062 /* The arrays lh->include_dirs and lh->file_names are
8063 0-based, but the directory and file name numbers in
8064 the statement program are 1-based. */
8065 struct file_entry
*fe
;
8068 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8069 line_ptr
+= bytes_read
;
8070 if (lh
->num_file_names
< file
|| file
== 0)
8071 dwarf2_debug_line_missing_file_complaint ();
8074 fe
= &lh
->file_names
[file
- 1];
8076 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8077 if (!decode_for_pst_p
)
8079 last_subfile
= current_subfile
;
8080 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8085 case DW_LNS_set_column
:
8086 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8087 line_ptr
+= bytes_read
;
8089 case DW_LNS_negate_stmt
:
8090 is_stmt
= (!is_stmt
);
8092 case DW_LNS_set_basic_block
:
8095 /* Add to the address register of the state machine the
8096 address increment value corresponding to special opcode
8097 255. I.e., this value is scaled by the minimum
8098 instruction length since special opcode 255 would have
8099 scaled the the increment. */
8100 case DW_LNS_const_add_pc
:
8101 address
+= (lh
->minimum_instruction_length
8102 * ((255 - lh
->opcode_base
) / lh
->line_range
));
8104 case DW_LNS_fixed_advance_pc
:
8105 address
+= read_2_bytes (abfd
, line_ptr
);
8110 /* Unknown standard opcode, ignore it. */
8113 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
8115 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
8116 line_ptr
+= bytes_read
;
8121 if (lh
->num_file_names
< file
|| file
== 0)
8122 dwarf2_debug_line_missing_file_complaint ();
8125 lh
->file_names
[file
- 1].included_p
= 1;
8126 if (!decode_for_pst_p
)
8128 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
8129 record_line (current_subfile
, 0, addr
);
8134 if (decode_for_pst_p
)
8138 /* Now that we're done scanning the Line Header Program, we can
8139 create the psymtab of each included file. */
8140 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
8141 if (lh
->file_names
[file_index
].included_p
== 1)
8143 const struct file_entry fe
= lh
->file_names
[file_index
];
8144 char *include_name
= fe
.name
;
8145 char *dir_name
= NULL
;
8146 char *pst_filename
= pst
->filename
;
8149 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
8151 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
8153 include_name
= concat (dir_name
, SLASH_STRING
,
8154 include_name
, (char *)NULL
);
8155 make_cleanup (xfree
, include_name
);
8158 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
8160 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
8161 pst_filename
, (char *)NULL
);
8162 make_cleanup (xfree
, pst_filename
);
8165 if (strcmp (include_name
, pst_filename
) != 0)
8166 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
8171 /* Make sure a symtab is created for every file, even files
8172 which contain only variables (i.e. no code with associated
8176 struct file_entry
*fe
;
8178 for (i
= 0; i
< lh
->num_file_names
; i
++)
8181 fe
= &lh
->file_names
[i
];
8183 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
8184 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
8186 /* Skip the main file; we don't need it, and it must be
8187 allocated last, so that it will show up before the
8188 non-primary symtabs in the objfile's symtab list. */
8189 if (current_subfile
== first_subfile
)
8192 if (current_subfile
->symtab
== NULL
)
8193 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
8195 fe
->symtab
= current_subfile
->symtab
;
8200 /* Start a subfile for DWARF. FILENAME is the name of the file and
8201 DIRNAME the name of the source directory which contains FILENAME
8202 or NULL if not known. COMP_DIR is the compilation directory for the
8203 linetable's compilation unit or NULL if not known.
8204 This routine tries to keep line numbers from identical absolute and
8205 relative file names in a common subfile.
8207 Using the `list' example from the GDB testsuite, which resides in
8208 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
8209 of /srcdir/list0.c yields the following debugging information for list0.c:
8211 DW_AT_name: /srcdir/list0.c
8212 DW_AT_comp_dir: /compdir
8213 files.files[0].name: list0.h
8214 files.files[0].dir: /srcdir
8215 files.files[1].name: list0.c
8216 files.files[1].dir: /srcdir
8218 The line number information for list0.c has to end up in a single
8219 subfile, so that `break /srcdir/list0.c:1' works as expected.
8220 start_subfile will ensure that this happens provided that we pass the
8221 concatenation of files.files[1].dir and files.files[1].name as the
8225 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
8229 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
8230 `start_symtab' will always pass the contents of DW_AT_comp_dir as
8231 second argument to start_subfile. To be consistent, we do the
8232 same here. In order not to lose the line information directory,
8233 we concatenate it to the filename when it makes sense.
8234 Note that the Dwarf3 standard says (speaking of filenames in line
8235 information): ``The directory index is ignored for file names
8236 that represent full path names''. Thus ignoring dirname in the
8237 `else' branch below isn't an issue. */
8239 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
8240 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
8242 fullname
= filename
;
8244 start_subfile (fullname
, comp_dir
);
8246 if (fullname
!= filename
)
8251 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
8252 struct dwarf2_cu
*cu
)
8254 struct objfile
*objfile
= cu
->objfile
;
8255 struct comp_unit_head
*cu_header
= &cu
->header
;
8257 /* NOTE drow/2003-01-30: There used to be a comment and some special
8258 code here to turn a symbol with DW_AT_external and a
8259 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
8260 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
8261 with some versions of binutils) where shared libraries could have
8262 relocations against symbols in their debug information - the
8263 minimal symbol would have the right address, but the debug info
8264 would not. It's no longer necessary, because we will explicitly
8265 apply relocations when we read in the debug information now. */
8267 /* A DW_AT_location attribute with no contents indicates that a
8268 variable has been optimized away. */
8269 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
8271 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8275 /* Handle one degenerate form of location expression specially, to
8276 preserve GDB's previous behavior when section offsets are
8277 specified. If this is just a DW_OP_addr then mark this symbol
8280 if (attr_form_is_block (attr
)
8281 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
8282 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
8286 SYMBOL_VALUE_ADDRESS (sym
) =
8287 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
8288 SYMBOL_CLASS (sym
) = LOC_STATIC
;
8289 fixup_symbol_section (sym
, objfile
);
8290 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
8291 SYMBOL_SECTION (sym
));
8295 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
8296 expression evaluator, and use LOC_COMPUTED only when necessary
8297 (i.e. when the value of a register or memory location is
8298 referenced, or a thread-local block, etc.). Then again, it might
8299 not be worthwhile. I'm assuming that it isn't unless performance
8300 or memory numbers show me otherwise. */
8302 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
8303 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
8306 /* Given a pointer to a DWARF information entry, figure out if we need
8307 to make a symbol table entry for it, and if so, create a new entry
8308 and return a pointer to it.
8309 If TYPE is NULL, determine symbol type from the die, otherwise
8310 used the passed type. */
8312 static struct symbol
*
8313 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
8315 struct objfile
*objfile
= cu
->objfile
;
8316 struct symbol
*sym
= NULL
;
8318 struct attribute
*attr
= NULL
;
8319 struct attribute
*attr2
= NULL
;
8321 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
8323 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8325 if (die
->tag
!= DW_TAG_namespace
)
8326 name
= dwarf2_linkage_name (die
, cu
);
8328 name
= TYPE_NAME (type
);
8332 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
8333 sizeof (struct symbol
));
8334 OBJSTAT (objfile
, n_syms
++);
8335 memset (sym
, 0, sizeof (struct symbol
));
8337 /* Cache this symbol's name and the name's demangled form (if any). */
8338 SYMBOL_LANGUAGE (sym
) = cu
->language
;
8339 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), 0, objfile
);
8341 /* Default assumptions.
8342 Use the passed type or decode it from the die. */
8343 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8344 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
8346 SYMBOL_TYPE (sym
) = type
;
8348 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
8349 attr
= dwarf2_attr (die
,
8350 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
8354 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
8357 attr
= dwarf2_attr (die
,
8358 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
8362 int file_index
= DW_UNSND (attr
);
8363 if (cu
->line_header
== NULL
8364 || file_index
> cu
->line_header
->num_file_names
)
8365 complaint (&symfile_complaints
,
8366 _("file index out of range"));
8367 else if (file_index
> 0)
8369 struct file_entry
*fe
;
8370 fe
= &cu
->line_header
->file_names
[file_index
- 1];
8371 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
8378 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
8381 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
8383 SYMBOL_CLASS (sym
) = LOC_LABEL
;
8385 case DW_TAG_subprogram
:
8386 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8388 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8389 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8390 if ((attr2
&& (DW_UNSND (attr2
) != 0))
8391 || cu
->language
== language_ada
)
8393 /* Subprograms marked external are stored as a global symbol.
8394 Ada subprograms, whether marked external or not, are always
8395 stored as a global symbol, because we want to be able to
8396 access them globally. For instance, we want to be able
8397 to break on a nested subprogram without having to
8398 specify the context. */
8399 add_symbol_to_list (sym
, &global_symbols
);
8403 add_symbol_to_list (sym
, cu
->list_in_scope
);
8406 case DW_TAG_inlined_subroutine
:
8407 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
8409 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
8410 SYMBOL_INLINED (sym
) = 1;
8411 /* Do not add the symbol to any lists. It will be found via
8412 BLOCK_FUNCTION from the blockvector. */
8414 case DW_TAG_variable
:
8415 /* Compilation with minimal debug info may result in variables
8416 with missing type entries. Change the misleading `void' type
8417 to something sensible. */
8418 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
8420 = objfile_type (objfile
)->nodebug_data_symbol
;
8422 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8425 dwarf2_const_value (attr
, sym
, cu
);
8426 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8427 if (attr2
&& (DW_UNSND (attr2
) != 0))
8428 add_symbol_to_list (sym
, &global_symbols
);
8430 add_symbol_to_list (sym
, cu
->list_in_scope
);
8433 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8436 var_decode_location (attr
, sym
, cu
);
8437 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8438 if (attr2
&& (DW_UNSND (attr2
) != 0))
8439 add_symbol_to_list (sym
, &global_symbols
);
8441 add_symbol_to_list (sym
, cu
->list_in_scope
);
8445 /* We do not know the address of this symbol.
8446 If it is an external symbol and we have type information
8447 for it, enter the symbol as a LOC_UNRESOLVED symbol.
8448 The address of the variable will then be determined from
8449 the minimal symbol table whenever the variable is
8451 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
8452 if (attr2
&& (DW_UNSND (attr2
) != 0)
8453 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
8455 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
8456 add_symbol_to_list (sym
, cu
->list_in_scope
);
8458 else if (!die_is_declaration (die
, cu
))
8460 /* Use the default LOC_OPTIMIZED_OUT class. */
8461 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
8462 add_symbol_to_list (sym
, cu
->list_in_scope
);
8466 case DW_TAG_formal_parameter
:
8467 /* If we are inside a function, mark this as an argument. If
8468 not, we might be looking at an argument to an inlined function
8469 when we do not have enough information to show inlined frames;
8470 pretend it's a local variable in that case so that the user can
8472 if (context_stack_depth
> 0
8473 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
8474 SYMBOL_IS_ARGUMENT (sym
) = 1;
8475 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
8478 var_decode_location (attr
, sym
, cu
);
8480 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8483 dwarf2_const_value (attr
, sym
, cu
);
8485 add_symbol_to_list (sym
, cu
->list_in_scope
);
8487 case DW_TAG_unspecified_parameters
:
8488 /* From varargs functions; gdb doesn't seem to have any
8489 interest in this information, so just ignore it for now.
8492 case DW_TAG_class_type
:
8493 case DW_TAG_interface_type
:
8494 case DW_TAG_structure_type
:
8495 case DW_TAG_union_type
:
8496 case DW_TAG_set_type
:
8497 case DW_TAG_enumeration_type
:
8498 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8499 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
8501 /* Make sure that the symbol includes appropriate enclosing
8502 classes/namespaces in its name. These are calculated in
8503 read_structure_type, and the correct name is saved in
8506 if (cu
->language
== language_cplus
8507 || cu
->language
== language_java
)
8509 struct type
*type
= SYMBOL_TYPE (sym
);
8511 if (TYPE_TAG_NAME (type
) != NULL
)
8513 /* FIXME: carlton/2003-11-10: Should this use
8514 SYMBOL_SET_NAMES instead? (The same problem also
8515 arises further down in this function.) */
8516 /* The type's name is already allocated along with
8517 this objfile, so we don't need to duplicate it
8519 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
8524 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
8525 really ever be static objects: otherwise, if you try
8526 to, say, break of a class's method and you're in a file
8527 which doesn't mention that class, it won't work unless
8528 the check for all static symbols in lookup_symbol_aux
8529 saves you. See the OtherFileClass tests in
8530 gdb.c++/namespace.exp. */
8532 struct pending
**list_to_add
;
8534 list_to_add
= (cu
->list_in_scope
== &file_symbols
8535 && (cu
->language
== language_cplus
8536 || cu
->language
== language_java
)
8537 ? &global_symbols
: cu
->list_in_scope
);
8539 add_symbol_to_list (sym
, list_to_add
);
8541 /* The semantics of C++ state that "struct foo { ... }" also
8542 defines a typedef for "foo". A Java class declaration also
8543 defines a typedef for the class. */
8544 if (cu
->language
== language_cplus
8545 || cu
->language
== language_java
8546 || cu
->language
== language_ada
)
8548 /* The symbol's name is already allocated along with
8549 this objfile, so we don't need to duplicate it for
8551 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8552 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8556 case DW_TAG_typedef
:
8557 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8558 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8559 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8560 add_symbol_to_list (sym
, cu
->list_in_scope
);
8562 case DW_TAG_base_type
:
8563 case DW_TAG_subrange_type
:
8564 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8565 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8566 add_symbol_to_list (sym
, cu
->list_in_scope
);
8568 case DW_TAG_enumerator
:
8569 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8570 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8573 dwarf2_const_value (attr
, sym
, cu
);
8576 /* NOTE: carlton/2003-11-10: See comment above in the
8577 DW_TAG_class_type, etc. block. */
8579 struct pending
**list_to_add
;
8581 list_to_add
= (cu
->list_in_scope
== &file_symbols
8582 && (cu
->language
== language_cplus
8583 || cu
->language
== language_java
)
8584 ? &global_symbols
: cu
->list_in_scope
);
8586 add_symbol_to_list (sym
, list_to_add
);
8589 case DW_TAG_namespace
:
8590 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8591 add_symbol_to_list (sym
, &global_symbols
);
8594 /* Not a tag we recognize. Hopefully we aren't processing
8595 trash data, but since we must specifically ignore things
8596 we don't recognize, there is nothing else we should do at
8598 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8599 dwarf_tag_name (die
->tag
));
8603 /* For the benefit of old versions of GCC, check for anonymous
8604 namespaces based on the demangled name. */
8605 if (!processing_has_namespace_info
8606 && cu
->language
== language_cplus
8607 && dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
) != NULL
)
8608 cp_scan_for_anonymous_namespaces (sym
);
8613 /* Copy constant value from an attribute to a symbol. */
8616 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8617 struct dwarf2_cu
*cu
)
8619 struct objfile
*objfile
= cu
->objfile
;
8620 struct comp_unit_head
*cu_header
= &cu
->header
;
8621 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8622 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8623 struct dwarf_block
*blk
;
8628 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8629 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8630 cu_header
->addr_size
,
8631 TYPE_LENGTH (SYMBOL_TYPE
8633 SYMBOL_VALUE_BYTES (sym
) =
8634 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8635 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8636 it's body - store_unsigned_integer. */
8637 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8638 byte_order
, DW_ADDR (attr
));
8639 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8641 case DW_FORM_string
:
8643 /* DW_STRING is already allocated on the obstack, point directly
8645 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8646 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8648 case DW_FORM_block1
:
8649 case DW_FORM_block2
:
8650 case DW_FORM_block4
:
8652 blk
= DW_BLOCK (attr
);
8653 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8654 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8656 TYPE_LENGTH (SYMBOL_TYPE
8658 SYMBOL_VALUE_BYTES (sym
) =
8659 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8660 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8661 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8664 /* The DW_AT_const_value attributes are supposed to carry the
8665 symbol's value "represented as it would be on the target
8666 architecture." By the time we get here, it's already been
8667 converted to host endianness, so we just need to sign- or
8668 zero-extend it as appropriate. */
8670 dwarf2_const_value_data (attr
, sym
, 8);
8673 dwarf2_const_value_data (attr
, sym
, 16);
8676 dwarf2_const_value_data (attr
, sym
, 32);
8679 dwarf2_const_value_data (attr
, sym
, 64);
8683 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8684 SYMBOL_CLASS (sym
) = LOC_CONST
;
8688 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8689 SYMBOL_CLASS (sym
) = LOC_CONST
;
8693 complaint (&symfile_complaints
,
8694 _("unsupported const value attribute form: '%s'"),
8695 dwarf_form_name (attr
->form
));
8696 SYMBOL_VALUE (sym
) = 0;
8697 SYMBOL_CLASS (sym
) = LOC_CONST
;
8703 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8704 or zero-extend it as appropriate for the symbol's type. */
8706 dwarf2_const_value_data (struct attribute
*attr
,
8710 LONGEST l
= DW_UNSND (attr
);
8712 if (bits
< sizeof (l
) * 8)
8714 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8715 l
&= ((LONGEST
) 1 << bits
) - 1;
8717 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8720 SYMBOL_VALUE (sym
) = l
;
8721 SYMBOL_CLASS (sym
) = LOC_CONST
;
8725 /* Return the type of the die in question using its DW_AT_type attribute. */
8727 static struct type
*
8728 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8731 struct attribute
*type_attr
;
8732 struct die_info
*type_die
;
8734 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8737 /* A missing DW_AT_type represents a void type. */
8738 return objfile_type (cu
->objfile
)->builtin_void
;
8741 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8743 type
= tag_type_to_type (type_die
, cu
);
8746 dump_die_for_error (type_die
);
8747 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8753 /* Return the containing type of the die in question using its
8754 DW_AT_containing_type attribute. */
8756 static struct type
*
8757 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8759 struct type
*type
= NULL
;
8760 struct attribute
*type_attr
;
8761 struct die_info
*type_die
= NULL
;
8763 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8766 type_die
= follow_die_ref_or_sig (die
, type_attr
, &cu
);
8767 type
= tag_type_to_type (type_die
, cu
);
8772 dump_die_for_error (type_die
);
8773 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8779 static struct type
*
8780 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8782 struct type
*this_type
;
8784 this_type
= read_type_die (die
, cu
);
8787 dump_die_for_error (die
);
8788 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8794 static struct type
*
8795 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8797 struct type
*this_type
;
8799 this_type
= get_die_type (die
, cu
);
8805 case DW_TAG_class_type
:
8806 case DW_TAG_interface_type
:
8807 case DW_TAG_structure_type
:
8808 case DW_TAG_union_type
:
8809 this_type
= read_structure_type (die
, cu
);
8811 case DW_TAG_enumeration_type
:
8812 this_type
= read_enumeration_type (die
, cu
);
8814 case DW_TAG_subprogram
:
8815 case DW_TAG_subroutine_type
:
8816 case DW_TAG_inlined_subroutine
:
8817 this_type
= read_subroutine_type (die
, cu
);
8819 case DW_TAG_array_type
:
8820 this_type
= read_array_type (die
, cu
);
8822 case DW_TAG_set_type
:
8823 this_type
= read_set_type (die
, cu
);
8825 case DW_TAG_pointer_type
:
8826 this_type
= read_tag_pointer_type (die
, cu
);
8828 case DW_TAG_ptr_to_member_type
:
8829 this_type
= read_tag_ptr_to_member_type (die
, cu
);
8831 case DW_TAG_reference_type
:
8832 this_type
= read_tag_reference_type (die
, cu
);
8834 case DW_TAG_const_type
:
8835 this_type
= read_tag_const_type (die
, cu
);
8837 case DW_TAG_volatile_type
:
8838 this_type
= read_tag_volatile_type (die
, cu
);
8840 case DW_TAG_string_type
:
8841 this_type
= read_tag_string_type (die
, cu
);
8843 case DW_TAG_typedef
:
8844 this_type
= read_typedef (die
, cu
);
8846 case DW_TAG_subrange_type
:
8847 this_type
= read_subrange_type (die
, cu
);
8849 case DW_TAG_base_type
:
8850 this_type
= read_base_type (die
, cu
);
8852 case DW_TAG_unspecified_type
:
8853 this_type
= read_unspecified_type (die
, cu
);
8855 case DW_TAG_namespace
:
8856 this_type
= read_namespace_type (die
, cu
);
8859 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
8860 dwarf_tag_name (die
->tag
));
8867 /* Return the name of the namespace/class that DIE is defined within,
8868 or "" if we can't tell. The caller should not xfree the result.
8870 For example, if we're within the method foo() in the following
8880 then determine_prefix on foo's die will return "N::C". */
8883 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
8885 struct die_info
*parent
, *spec_die
;
8886 struct dwarf2_cu
*spec_cu
;
8887 struct type
*parent_type
;
8889 if (cu
->language
!= language_cplus
8890 && cu
->language
!= language_java
)
8893 /* We have to be careful in the presence of DW_AT_specification.
8894 For example, with GCC 3.4, given the code
8898 // Definition of N::foo.
8902 then we'll have a tree of DIEs like this:
8904 1: DW_TAG_compile_unit
8905 2: DW_TAG_namespace // N
8906 3: DW_TAG_subprogram // declaration of N::foo
8907 4: DW_TAG_subprogram // definition of N::foo
8908 DW_AT_specification // refers to die #3
8910 Thus, when processing die #4, we have to pretend that we're in
8911 the context of its DW_AT_specification, namely the contex of die
8914 spec_die
= die_specification (die
, &spec_cu
);
8915 if (spec_die
== NULL
)
8916 parent
= die
->parent
;
8919 parent
= spec_die
->parent
;
8926 switch (parent
->tag
)
8928 case DW_TAG_namespace
:
8929 parent_type
= read_type_die (parent
, cu
);
8930 /* We give a name to even anonymous namespaces. */
8931 return TYPE_TAG_NAME (parent_type
);
8932 case DW_TAG_class_type
:
8933 case DW_TAG_interface_type
:
8934 case DW_TAG_structure_type
:
8935 case DW_TAG_union_type
:
8936 parent_type
= read_type_die (parent
, cu
);
8937 if (TYPE_TAG_NAME (parent_type
) != NULL
)
8938 return TYPE_TAG_NAME (parent_type
);
8940 /* An anonymous structure is only allowed non-static data
8941 members; no typedefs, no member functions, et cetera.
8942 So it does not need a prefix. */
8945 return determine_prefix (parent
, cu
);
8949 /* Return a newly-allocated string formed by concatenating PREFIX and
8950 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8951 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8952 perform an obconcat, otherwise allocate storage for the result. The CU argument
8953 is used to determine the language and hence, the appropriate separator. */
8955 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8958 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
8959 struct dwarf2_cu
*cu
)
8963 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
8965 else if (cu
->language
== language_java
)
8977 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
8978 strcpy (retval
, prefix
);
8979 strcat (retval
, sep
);
8980 strcat (retval
, suffix
);
8985 /* We have an obstack. */
8986 return obconcat (obs
, prefix
, sep
, suffix
);
8990 /* Return sibling of die, NULL if no sibling. */
8992 static struct die_info
*
8993 sibling_die (struct die_info
*die
)
8995 return die
->sibling
;
8998 /* Get linkage name of a die, return NULL if not found. */
9001 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9003 struct attribute
*attr
;
9005 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
9006 if (attr
&& DW_STRING (attr
))
9007 return DW_STRING (attr
);
9008 return dwarf2_name (die
, cu
);
9011 /* Get name of a die, return NULL if not found. */
9014 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
9015 struct obstack
*obstack
)
9017 if (name
&& cu
->language
== language_cplus
)
9019 char *canon_name
= cp_canonicalize_string (name
);
9021 if (canon_name
!= NULL
)
9023 if (strcmp (canon_name
, name
) != 0)
9024 name
= obsavestring (canon_name
, strlen (canon_name
),
9033 /* Get name of a die, return NULL if not found. */
9036 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
9038 struct attribute
*attr
;
9040 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
9041 if (!attr
|| !DW_STRING (attr
))
9046 case DW_TAG_compile_unit
:
9047 /* Compilation units have a DW_AT_name that is a filename, not
9048 a source language identifier. */
9049 case DW_TAG_enumeration_type
:
9050 case DW_TAG_enumerator
:
9051 /* These tags always have simple identifiers already; no need
9052 to canonicalize them. */
9053 return DW_STRING (attr
);
9055 if (!DW_STRING_IS_CANONICAL (attr
))
9058 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
9059 &cu
->objfile
->objfile_obstack
);
9060 DW_STRING_IS_CANONICAL (attr
) = 1;
9062 return DW_STRING (attr
);
9066 /* Return the die that this die in an extension of, or NULL if there
9067 is none. *EXT_CU is the CU containing DIE on input, and the CU
9068 containing the return value on output. */
9070 static struct die_info
*
9071 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
9073 struct attribute
*attr
;
9075 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
9079 return follow_die_ref (die
, attr
, ext_cu
);
9082 /* Convert a DIE tag into its string name. */
9085 dwarf_tag_name (unsigned tag
)
9089 case DW_TAG_padding
:
9090 return "DW_TAG_padding";
9091 case DW_TAG_array_type
:
9092 return "DW_TAG_array_type";
9093 case DW_TAG_class_type
:
9094 return "DW_TAG_class_type";
9095 case DW_TAG_entry_point
:
9096 return "DW_TAG_entry_point";
9097 case DW_TAG_enumeration_type
:
9098 return "DW_TAG_enumeration_type";
9099 case DW_TAG_formal_parameter
:
9100 return "DW_TAG_formal_parameter";
9101 case DW_TAG_imported_declaration
:
9102 return "DW_TAG_imported_declaration";
9104 return "DW_TAG_label";
9105 case DW_TAG_lexical_block
:
9106 return "DW_TAG_lexical_block";
9108 return "DW_TAG_member";
9109 case DW_TAG_pointer_type
:
9110 return "DW_TAG_pointer_type";
9111 case DW_TAG_reference_type
:
9112 return "DW_TAG_reference_type";
9113 case DW_TAG_compile_unit
:
9114 return "DW_TAG_compile_unit";
9115 case DW_TAG_string_type
:
9116 return "DW_TAG_string_type";
9117 case DW_TAG_structure_type
:
9118 return "DW_TAG_structure_type";
9119 case DW_TAG_subroutine_type
:
9120 return "DW_TAG_subroutine_type";
9121 case DW_TAG_typedef
:
9122 return "DW_TAG_typedef";
9123 case DW_TAG_union_type
:
9124 return "DW_TAG_union_type";
9125 case DW_TAG_unspecified_parameters
:
9126 return "DW_TAG_unspecified_parameters";
9127 case DW_TAG_variant
:
9128 return "DW_TAG_variant";
9129 case DW_TAG_common_block
:
9130 return "DW_TAG_common_block";
9131 case DW_TAG_common_inclusion
:
9132 return "DW_TAG_common_inclusion";
9133 case DW_TAG_inheritance
:
9134 return "DW_TAG_inheritance";
9135 case DW_TAG_inlined_subroutine
:
9136 return "DW_TAG_inlined_subroutine";
9138 return "DW_TAG_module";
9139 case DW_TAG_ptr_to_member_type
:
9140 return "DW_TAG_ptr_to_member_type";
9141 case DW_TAG_set_type
:
9142 return "DW_TAG_set_type";
9143 case DW_TAG_subrange_type
:
9144 return "DW_TAG_subrange_type";
9145 case DW_TAG_with_stmt
:
9146 return "DW_TAG_with_stmt";
9147 case DW_TAG_access_declaration
:
9148 return "DW_TAG_access_declaration";
9149 case DW_TAG_base_type
:
9150 return "DW_TAG_base_type";
9151 case DW_TAG_catch_block
:
9152 return "DW_TAG_catch_block";
9153 case DW_TAG_const_type
:
9154 return "DW_TAG_const_type";
9155 case DW_TAG_constant
:
9156 return "DW_TAG_constant";
9157 case DW_TAG_enumerator
:
9158 return "DW_TAG_enumerator";
9159 case DW_TAG_file_type
:
9160 return "DW_TAG_file_type";
9162 return "DW_TAG_friend";
9163 case DW_TAG_namelist
:
9164 return "DW_TAG_namelist";
9165 case DW_TAG_namelist_item
:
9166 return "DW_TAG_namelist_item";
9167 case DW_TAG_packed_type
:
9168 return "DW_TAG_packed_type";
9169 case DW_TAG_subprogram
:
9170 return "DW_TAG_subprogram";
9171 case DW_TAG_template_type_param
:
9172 return "DW_TAG_template_type_param";
9173 case DW_TAG_template_value_param
:
9174 return "DW_TAG_template_value_param";
9175 case DW_TAG_thrown_type
:
9176 return "DW_TAG_thrown_type";
9177 case DW_TAG_try_block
:
9178 return "DW_TAG_try_block";
9179 case DW_TAG_variant_part
:
9180 return "DW_TAG_variant_part";
9181 case DW_TAG_variable
:
9182 return "DW_TAG_variable";
9183 case DW_TAG_volatile_type
:
9184 return "DW_TAG_volatile_type";
9185 case DW_TAG_dwarf_procedure
:
9186 return "DW_TAG_dwarf_procedure";
9187 case DW_TAG_restrict_type
:
9188 return "DW_TAG_restrict_type";
9189 case DW_TAG_interface_type
:
9190 return "DW_TAG_interface_type";
9191 case DW_TAG_namespace
:
9192 return "DW_TAG_namespace";
9193 case DW_TAG_imported_module
:
9194 return "DW_TAG_imported_module";
9195 case DW_TAG_unspecified_type
:
9196 return "DW_TAG_unspecified_type";
9197 case DW_TAG_partial_unit
:
9198 return "DW_TAG_partial_unit";
9199 case DW_TAG_imported_unit
:
9200 return "DW_TAG_imported_unit";
9201 case DW_TAG_condition
:
9202 return "DW_TAG_condition";
9203 case DW_TAG_shared_type
:
9204 return "DW_TAG_shared_type";
9205 case DW_TAG_type_unit
:
9206 return "DW_TAG_type_unit";
9207 case DW_TAG_MIPS_loop
:
9208 return "DW_TAG_MIPS_loop";
9209 case DW_TAG_HP_array_descriptor
:
9210 return "DW_TAG_HP_array_descriptor";
9211 case DW_TAG_format_label
:
9212 return "DW_TAG_format_label";
9213 case DW_TAG_function_template
:
9214 return "DW_TAG_function_template";
9215 case DW_TAG_class_template
:
9216 return "DW_TAG_class_template";
9217 case DW_TAG_GNU_BINCL
:
9218 return "DW_TAG_GNU_BINCL";
9219 case DW_TAG_GNU_EINCL
:
9220 return "DW_TAG_GNU_EINCL";
9221 case DW_TAG_upc_shared_type
:
9222 return "DW_TAG_upc_shared_type";
9223 case DW_TAG_upc_strict_type
:
9224 return "DW_TAG_upc_strict_type";
9225 case DW_TAG_upc_relaxed_type
:
9226 return "DW_TAG_upc_relaxed_type";
9227 case DW_TAG_PGI_kanji_type
:
9228 return "DW_TAG_PGI_kanji_type";
9229 case DW_TAG_PGI_interface_block
:
9230 return "DW_TAG_PGI_interface_block";
9232 return "DW_TAG_<unknown>";
9236 /* Convert a DWARF attribute code into its string name. */
9239 dwarf_attr_name (unsigned attr
)
9244 return "DW_AT_sibling";
9245 case DW_AT_location
:
9246 return "DW_AT_location";
9248 return "DW_AT_name";
9249 case DW_AT_ordering
:
9250 return "DW_AT_ordering";
9251 case DW_AT_subscr_data
:
9252 return "DW_AT_subscr_data";
9253 case DW_AT_byte_size
:
9254 return "DW_AT_byte_size";
9255 case DW_AT_bit_offset
:
9256 return "DW_AT_bit_offset";
9257 case DW_AT_bit_size
:
9258 return "DW_AT_bit_size";
9259 case DW_AT_element_list
:
9260 return "DW_AT_element_list";
9261 case DW_AT_stmt_list
:
9262 return "DW_AT_stmt_list";
9264 return "DW_AT_low_pc";
9266 return "DW_AT_high_pc";
9267 case DW_AT_language
:
9268 return "DW_AT_language";
9270 return "DW_AT_member";
9272 return "DW_AT_discr";
9273 case DW_AT_discr_value
:
9274 return "DW_AT_discr_value";
9275 case DW_AT_visibility
:
9276 return "DW_AT_visibility";
9278 return "DW_AT_import";
9279 case DW_AT_string_length
:
9280 return "DW_AT_string_length";
9281 case DW_AT_common_reference
:
9282 return "DW_AT_common_reference";
9283 case DW_AT_comp_dir
:
9284 return "DW_AT_comp_dir";
9285 case DW_AT_const_value
:
9286 return "DW_AT_const_value";
9287 case DW_AT_containing_type
:
9288 return "DW_AT_containing_type";
9289 case DW_AT_default_value
:
9290 return "DW_AT_default_value";
9292 return "DW_AT_inline";
9293 case DW_AT_is_optional
:
9294 return "DW_AT_is_optional";
9295 case DW_AT_lower_bound
:
9296 return "DW_AT_lower_bound";
9297 case DW_AT_producer
:
9298 return "DW_AT_producer";
9299 case DW_AT_prototyped
:
9300 return "DW_AT_prototyped";
9301 case DW_AT_return_addr
:
9302 return "DW_AT_return_addr";
9303 case DW_AT_start_scope
:
9304 return "DW_AT_start_scope";
9305 case DW_AT_bit_stride
:
9306 return "DW_AT_bit_stride";
9307 case DW_AT_upper_bound
:
9308 return "DW_AT_upper_bound";
9309 case DW_AT_abstract_origin
:
9310 return "DW_AT_abstract_origin";
9311 case DW_AT_accessibility
:
9312 return "DW_AT_accessibility";
9313 case DW_AT_address_class
:
9314 return "DW_AT_address_class";
9315 case DW_AT_artificial
:
9316 return "DW_AT_artificial";
9317 case DW_AT_base_types
:
9318 return "DW_AT_base_types";
9319 case DW_AT_calling_convention
:
9320 return "DW_AT_calling_convention";
9322 return "DW_AT_count";
9323 case DW_AT_data_member_location
:
9324 return "DW_AT_data_member_location";
9325 case DW_AT_decl_column
:
9326 return "DW_AT_decl_column";
9327 case DW_AT_decl_file
:
9328 return "DW_AT_decl_file";
9329 case DW_AT_decl_line
:
9330 return "DW_AT_decl_line";
9331 case DW_AT_declaration
:
9332 return "DW_AT_declaration";
9333 case DW_AT_discr_list
:
9334 return "DW_AT_discr_list";
9335 case DW_AT_encoding
:
9336 return "DW_AT_encoding";
9337 case DW_AT_external
:
9338 return "DW_AT_external";
9339 case DW_AT_frame_base
:
9340 return "DW_AT_frame_base";
9342 return "DW_AT_friend";
9343 case DW_AT_identifier_case
:
9344 return "DW_AT_identifier_case";
9345 case DW_AT_macro_info
:
9346 return "DW_AT_macro_info";
9347 case DW_AT_namelist_items
:
9348 return "DW_AT_namelist_items";
9349 case DW_AT_priority
:
9350 return "DW_AT_priority";
9352 return "DW_AT_segment";
9353 case DW_AT_specification
:
9354 return "DW_AT_specification";
9355 case DW_AT_static_link
:
9356 return "DW_AT_static_link";
9358 return "DW_AT_type";
9359 case DW_AT_use_location
:
9360 return "DW_AT_use_location";
9361 case DW_AT_variable_parameter
:
9362 return "DW_AT_variable_parameter";
9363 case DW_AT_virtuality
:
9364 return "DW_AT_virtuality";
9365 case DW_AT_vtable_elem_location
:
9366 return "DW_AT_vtable_elem_location";
9367 /* DWARF 3 values. */
9368 case DW_AT_allocated
:
9369 return "DW_AT_allocated";
9370 case DW_AT_associated
:
9371 return "DW_AT_associated";
9372 case DW_AT_data_location
:
9373 return "DW_AT_data_location";
9374 case DW_AT_byte_stride
:
9375 return "DW_AT_byte_stride";
9376 case DW_AT_entry_pc
:
9377 return "DW_AT_entry_pc";
9378 case DW_AT_use_UTF8
:
9379 return "DW_AT_use_UTF8";
9380 case DW_AT_extension
:
9381 return "DW_AT_extension";
9383 return "DW_AT_ranges";
9384 case DW_AT_trampoline
:
9385 return "DW_AT_trampoline";
9386 case DW_AT_call_column
:
9387 return "DW_AT_call_column";
9388 case DW_AT_call_file
:
9389 return "DW_AT_call_file";
9390 case DW_AT_call_line
:
9391 return "DW_AT_call_line";
9392 case DW_AT_description
:
9393 return "DW_AT_description";
9394 case DW_AT_binary_scale
:
9395 return "DW_AT_binary_scale";
9396 case DW_AT_decimal_scale
:
9397 return "DW_AT_decimal_scale";
9399 return "DW_AT_small";
9400 case DW_AT_decimal_sign
:
9401 return "DW_AT_decimal_sign";
9402 case DW_AT_digit_count
:
9403 return "DW_AT_digit_count";
9404 case DW_AT_picture_string
:
9405 return "DW_AT_picture_string";
9407 return "DW_AT_mutable";
9408 case DW_AT_threads_scaled
:
9409 return "DW_AT_threads_scaled";
9410 case DW_AT_explicit
:
9411 return "DW_AT_explicit";
9412 case DW_AT_object_pointer
:
9413 return "DW_AT_object_pointer";
9414 case DW_AT_endianity
:
9415 return "DW_AT_endianity";
9416 case DW_AT_elemental
:
9417 return "DW_AT_elemental";
9419 return "DW_AT_pure";
9420 case DW_AT_recursive
:
9421 return "DW_AT_recursive";
9422 /* DWARF 4 values. */
9423 case DW_AT_signature
:
9424 return "DW_AT_signature";
9425 /* SGI/MIPS extensions. */
9426 #ifdef MIPS /* collides with DW_AT_HP_block_index */
9427 case DW_AT_MIPS_fde
:
9428 return "DW_AT_MIPS_fde";
9430 case DW_AT_MIPS_loop_begin
:
9431 return "DW_AT_MIPS_loop_begin";
9432 case DW_AT_MIPS_tail_loop_begin
:
9433 return "DW_AT_MIPS_tail_loop_begin";
9434 case DW_AT_MIPS_epilog_begin
:
9435 return "DW_AT_MIPS_epilog_begin";
9436 case DW_AT_MIPS_loop_unroll_factor
:
9437 return "DW_AT_MIPS_loop_unroll_factor";
9438 case DW_AT_MIPS_software_pipeline_depth
:
9439 return "DW_AT_MIPS_software_pipeline_depth";
9440 case DW_AT_MIPS_linkage_name
:
9441 return "DW_AT_MIPS_linkage_name";
9442 case DW_AT_MIPS_stride
:
9443 return "DW_AT_MIPS_stride";
9444 case DW_AT_MIPS_abstract_name
:
9445 return "DW_AT_MIPS_abstract_name";
9446 case DW_AT_MIPS_clone_origin
:
9447 return "DW_AT_MIPS_clone_origin";
9448 case DW_AT_MIPS_has_inlines
:
9449 return "DW_AT_MIPS_has_inlines";
9450 /* HP extensions. */
9451 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
9452 case DW_AT_HP_block_index
:
9453 return "DW_AT_HP_block_index";
9455 case DW_AT_HP_unmodifiable
:
9456 return "DW_AT_HP_unmodifiable";
9457 case DW_AT_HP_actuals_stmt_list
:
9458 return "DW_AT_HP_actuals_stmt_list";
9459 case DW_AT_HP_proc_per_section
:
9460 return "DW_AT_HP_proc_per_section";
9461 case DW_AT_HP_raw_data_ptr
:
9462 return "DW_AT_HP_raw_data_ptr";
9463 case DW_AT_HP_pass_by_reference
:
9464 return "DW_AT_HP_pass_by_reference";
9465 case DW_AT_HP_opt_level
:
9466 return "DW_AT_HP_opt_level";
9467 case DW_AT_HP_prof_version_id
:
9468 return "DW_AT_HP_prof_version_id";
9469 case DW_AT_HP_opt_flags
:
9470 return "DW_AT_HP_opt_flags";
9471 case DW_AT_HP_cold_region_low_pc
:
9472 return "DW_AT_HP_cold_region_low_pc";
9473 case DW_AT_HP_cold_region_high_pc
:
9474 return "DW_AT_HP_cold_region_high_pc";
9475 case DW_AT_HP_all_variables_modifiable
:
9476 return "DW_AT_HP_all_variables_modifiable";
9477 case DW_AT_HP_linkage_name
:
9478 return "DW_AT_HP_linkage_name";
9479 case DW_AT_HP_prof_flags
:
9480 return "DW_AT_HP_prof_flags";
9481 /* GNU extensions. */
9482 case DW_AT_sf_names
:
9483 return "DW_AT_sf_names";
9484 case DW_AT_src_info
:
9485 return "DW_AT_src_info";
9486 case DW_AT_mac_info
:
9487 return "DW_AT_mac_info";
9488 case DW_AT_src_coords
:
9489 return "DW_AT_src_coords";
9490 case DW_AT_body_begin
:
9491 return "DW_AT_body_begin";
9492 case DW_AT_body_end
:
9493 return "DW_AT_body_end";
9494 case DW_AT_GNU_vector
:
9495 return "DW_AT_GNU_vector";
9496 /* VMS extensions. */
9497 case DW_AT_VMS_rtnbeg_pd_address
:
9498 return "DW_AT_VMS_rtnbeg_pd_address";
9499 /* UPC extension. */
9500 case DW_AT_upc_threads_scaled
:
9501 return "DW_AT_upc_threads_scaled";
9502 /* PGI (STMicroelectronics) extensions. */
9503 case DW_AT_PGI_lbase
:
9504 return "DW_AT_PGI_lbase";
9505 case DW_AT_PGI_soffset
:
9506 return "DW_AT_PGI_soffset";
9507 case DW_AT_PGI_lstride
:
9508 return "DW_AT_PGI_lstride";
9510 return "DW_AT_<unknown>";
9514 /* Convert a DWARF value form code into its string name. */
9517 dwarf_form_name (unsigned form
)
9522 return "DW_FORM_addr";
9523 case DW_FORM_block2
:
9524 return "DW_FORM_block2";
9525 case DW_FORM_block4
:
9526 return "DW_FORM_block4";
9528 return "DW_FORM_data2";
9530 return "DW_FORM_data4";
9532 return "DW_FORM_data8";
9533 case DW_FORM_string
:
9534 return "DW_FORM_string";
9536 return "DW_FORM_block";
9537 case DW_FORM_block1
:
9538 return "DW_FORM_block1";
9540 return "DW_FORM_data1";
9542 return "DW_FORM_flag";
9544 return "DW_FORM_sdata";
9546 return "DW_FORM_strp";
9548 return "DW_FORM_udata";
9549 case DW_FORM_ref_addr
:
9550 return "DW_FORM_ref_addr";
9552 return "DW_FORM_ref1";
9554 return "DW_FORM_ref2";
9556 return "DW_FORM_ref4";
9558 return "DW_FORM_ref8";
9559 case DW_FORM_ref_udata
:
9560 return "DW_FORM_ref_udata";
9561 case DW_FORM_indirect
:
9562 return "DW_FORM_indirect";
9563 case DW_FORM_sec_offset
:
9564 return "DW_FORM_sec_offset";
9565 case DW_FORM_exprloc
:
9566 return "DW_FORM_exprloc";
9567 case DW_FORM_flag_present
:
9568 return "DW_FORM_flag_present";
9570 return "DW_FORM_sig8";
9572 return "DW_FORM_<unknown>";
9576 /* Convert a DWARF stack opcode into its string name. */
9579 dwarf_stack_op_name (unsigned op
)
9584 return "DW_OP_addr";
9586 return "DW_OP_deref";
9588 return "DW_OP_const1u";
9590 return "DW_OP_const1s";
9592 return "DW_OP_const2u";
9594 return "DW_OP_const2s";
9596 return "DW_OP_const4u";
9598 return "DW_OP_const4s";
9600 return "DW_OP_const8u";
9602 return "DW_OP_const8s";
9604 return "DW_OP_constu";
9606 return "DW_OP_consts";
9610 return "DW_OP_drop";
9612 return "DW_OP_over";
9614 return "DW_OP_pick";
9616 return "DW_OP_swap";
9620 return "DW_OP_xderef";
9628 return "DW_OP_minus";
9640 return "DW_OP_plus";
9641 case DW_OP_plus_uconst
:
9642 return "DW_OP_plus_uconst";
9648 return "DW_OP_shra";
9666 return "DW_OP_skip";
9668 return "DW_OP_lit0";
9670 return "DW_OP_lit1";
9672 return "DW_OP_lit2";
9674 return "DW_OP_lit3";
9676 return "DW_OP_lit4";
9678 return "DW_OP_lit5";
9680 return "DW_OP_lit6";
9682 return "DW_OP_lit7";
9684 return "DW_OP_lit8";
9686 return "DW_OP_lit9";
9688 return "DW_OP_lit10";
9690 return "DW_OP_lit11";
9692 return "DW_OP_lit12";
9694 return "DW_OP_lit13";
9696 return "DW_OP_lit14";
9698 return "DW_OP_lit15";
9700 return "DW_OP_lit16";
9702 return "DW_OP_lit17";
9704 return "DW_OP_lit18";
9706 return "DW_OP_lit19";
9708 return "DW_OP_lit20";
9710 return "DW_OP_lit21";
9712 return "DW_OP_lit22";
9714 return "DW_OP_lit23";
9716 return "DW_OP_lit24";
9718 return "DW_OP_lit25";
9720 return "DW_OP_lit26";
9722 return "DW_OP_lit27";
9724 return "DW_OP_lit28";
9726 return "DW_OP_lit29";
9728 return "DW_OP_lit30";
9730 return "DW_OP_lit31";
9732 return "DW_OP_reg0";
9734 return "DW_OP_reg1";
9736 return "DW_OP_reg2";
9738 return "DW_OP_reg3";
9740 return "DW_OP_reg4";
9742 return "DW_OP_reg5";
9744 return "DW_OP_reg6";
9746 return "DW_OP_reg7";
9748 return "DW_OP_reg8";
9750 return "DW_OP_reg9";
9752 return "DW_OP_reg10";
9754 return "DW_OP_reg11";
9756 return "DW_OP_reg12";
9758 return "DW_OP_reg13";
9760 return "DW_OP_reg14";
9762 return "DW_OP_reg15";
9764 return "DW_OP_reg16";
9766 return "DW_OP_reg17";
9768 return "DW_OP_reg18";
9770 return "DW_OP_reg19";
9772 return "DW_OP_reg20";
9774 return "DW_OP_reg21";
9776 return "DW_OP_reg22";
9778 return "DW_OP_reg23";
9780 return "DW_OP_reg24";
9782 return "DW_OP_reg25";
9784 return "DW_OP_reg26";
9786 return "DW_OP_reg27";
9788 return "DW_OP_reg28";
9790 return "DW_OP_reg29";
9792 return "DW_OP_reg30";
9794 return "DW_OP_reg31";
9796 return "DW_OP_breg0";
9798 return "DW_OP_breg1";
9800 return "DW_OP_breg2";
9802 return "DW_OP_breg3";
9804 return "DW_OP_breg4";
9806 return "DW_OP_breg5";
9808 return "DW_OP_breg6";
9810 return "DW_OP_breg7";
9812 return "DW_OP_breg8";
9814 return "DW_OP_breg9";
9816 return "DW_OP_breg10";
9818 return "DW_OP_breg11";
9820 return "DW_OP_breg12";
9822 return "DW_OP_breg13";
9824 return "DW_OP_breg14";
9826 return "DW_OP_breg15";
9828 return "DW_OP_breg16";
9830 return "DW_OP_breg17";
9832 return "DW_OP_breg18";
9834 return "DW_OP_breg19";
9836 return "DW_OP_breg20";
9838 return "DW_OP_breg21";
9840 return "DW_OP_breg22";
9842 return "DW_OP_breg23";
9844 return "DW_OP_breg24";
9846 return "DW_OP_breg25";
9848 return "DW_OP_breg26";
9850 return "DW_OP_breg27";
9852 return "DW_OP_breg28";
9854 return "DW_OP_breg29";
9856 return "DW_OP_breg30";
9858 return "DW_OP_breg31";
9860 return "DW_OP_regx";
9862 return "DW_OP_fbreg";
9864 return "DW_OP_bregx";
9866 return "DW_OP_piece";
9867 case DW_OP_deref_size
:
9868 return "DW_OP_deref_size";
9869 case DW_OP_xderef_size
:
9870 return "DW_OP_xderef_size";
9873 /* DWARF 3 extensions. */
9874 case DW_OP_push_object_address
:
9875 return "DW_OP_push_object_address";
9877 return "DW_OP_call2";
9879 return "DW_OP_call4";
9880 case DW_OP_call_ref
:
9881 return "DW_OP_call_ref";
9882 /* GNU extensions. */
9883 case DW_OP_form_tls_address
:
9884 return "DW_OP_form_tls_address";
9885 case DW_OP_call_frame_cfa
:
9886 return "DW_OP_call_frame_cfa";
9887 case DW_OP_bit_piece
:
9888 return "DW_OP_bit_piece";
9889 case DW_OP_GNU_push_tls_address
:
9890 return "DW_OP_GNU_push_tls_address";
9891 case DW_OP_GNU_uninit
:
9892 return "DW_OP_GNU_uninit";
9893 /* HP extensions. */
9894 case DW_OP_HP_is_value
:
9895 return "DW_OP_HP_is_value";
9896 case DW_OP_HP_fltconst4
:
9897 return "DW_OP_HP_fltconst4";
9898 case DW_OP_HP_fltconst8
:
9899 return "DW_OP_HP_fltconst8";
9900 case DW_OP_HP_mod_range
:
9901 return "DW_OP_HP_mod_range";
9902 case DW_OP_HP_unmod_range
:
9903 return "DW_OP_HP_unmod_range";
9905 return "DW_OP_HP_tls";
9907 return "OP_<unknown>";
9912 dwarf_bool_name (unsigned mybool
)
9920 /* Convert a DWARF type code into its string name. */
9923 dwarf_type_encoding_name (unsigned enc
)
9928 return "DW_ATE_void";
9929 case DW_ATE_address
:
9930 return "DW_ATE_address";
9931 case DW_ATE_boolean
:
9932 return "DW_ATE_boolean";
9933 case DW_ATE_complex_float
:
9934 return "DW_ATE_complex_float";
9936 return "DW_ATE_float";
9938 return "DW_ATE_signed";
9939 case DW_ATE_signed_char
:
9940 return "DW_ATE_signed_char";
9941 case DW_ATE_unsigned
:
9942 return "DW_ATE_unsigned";
9943 case DW_ATE_unsigned_char
:
9944 return "DW_ATE_unsigned_char";
9946 case DW_ATE_imaginary_float
:
9947 return "DW_ATE_imaginary_float";
9948 case DW_ATE_packed_decimal
:
9949 return "DW_ATE_packed_decimal";
9950 case DW_ATE_numeric_string
:
9951 return "DW_ATE_numeric_string";
9953 return "DW_ATE_edited";
9954 case DW_ATE_signed_fixed
:
9955 return "DW_ATE_signed_fixed";
9956 case DW_ATE_unsigned_fixed
:
9957 return "DW_ATE_unsigned_fixed";
9958 case DW_ATE_decimal_float
:
9959 return "DW_ATE_decimal_float";
9960 /* HP extensions. */
9961 case DW_ATE_HP_float80
:
9962 return "DW_ATE_HP_float80";
9963 case DW_ATE_HP_complex_float80
:
9964 return "DW_ATE_HP_complex_float80";
9965 case DW_ATE_HP_float128
:
9966 return "DW_ATE_HP_float128";
9967 case DW_ATE_HP_complex_float128
:
9968 return "DW_ATE_HP_complex_float128";
9969 case DW_ATE_HP_floathpintel
:
9970 return "DW_ATE_HP_floathpintel";
9971 case DW_ATE_HP_imaginary_float80
:
9972 return "DW_ATE_HP_imaginary_float80";
9973 case DW_ATE_HP_imaginary_float128
:
9974 return "DW_ATE_HP_imaginary_float128";
9976 return "DW_ATE_<unknown>";
9980 /* Convert a DWARF call frame info operation to its string name. */
9984 dwarf_cfi_name (unsigned cfi_opc
)
9988 case DW_CFA_advance_loc
:
9989 return "DW_CFA_advance_loc";
9991 return "DW_CFA_offset";
9992 case DW_CFA_restore
:
9993 return "DW_CFA_restore";
9995 return "DW_CFA_nop";
9996 case DW_CFA_set_loc
:
9997 return "DW_CFA_set_loc";
9998 case DW_CFA_advance_loc1
:
9999 return "DW_CFA_advance_loc1";
10000 case DW_CFA_advance_loc2
:
10001 return "DW_CFA_advance_loc2";
10002 case DW_CFA_advance_loc4
:
10003 return "DW_CFA_advance_loc4";
10004 case DW_CFA_offset_extended
:
10005 return "DW_CFA_offset_extended";
10006 case DW_CFA_restore_extended
:
10007 return "DW_CFA_restore_extended";
10008 case DW_CFA_undefined
:
10009 return "DW_CFA_undefined";
10010 case DW_CFA_same_value
:
10011 return "DW_CFA_same_value";
10012 case DW_CFA_register
:
10013 return "DW_CFA_register";
10014 case DW_CFA_remember_state
:
10015 return "DW_CFA_remember_state";
10016 case DW_CFA_restore_state
:
10017 return "DW_CFA_restore_state";
10018 case DW_CFA_def_cfa
:
10019 return "DW_CFA_def_cfa";
10020 case DW_CFA_def_cfa_register
:
10021 return "DW_CFA_def_cfa_register";
10022 case DW_CFA_def_cfa_offset
:
10023 return "DW_CFA_def_cfa_offset";
10025 case DW_CFA_def_cfa_expression
:
10026 return "DW_CFA_def_cfa_expression";
10027 case DW_CFA_expression
:
10028 return "DW_CFA_expression";
10029 case DW_CFA_offset_extended_sf
:
10030 return "DW_CFA_offset_extended_sf";
10031 case DW_CFA_def_cfa_sf
:
10032 return "DW_CFA_def_cfa_sf";
10033 case DW_CFA_def_cfa_offset_sf
:
10034 return "DW_CFA_def_cfa_offset_sf";
10035 case DW_CFA_val_offset
:
10036 return "DW_CFA_val_offset";
10037 case DW_CFA_val_offset_sf
:
10038 return "DW_CFA_val_offset_sf";
10039 case DW_CFA_val_expression
:
10040 return "DW_CFA_val_expression";
10041 /* SGI/MIPS specific. */
10042 case DW_CFA_MIPS_advance_loc8
:
10043 return "DW_CFA_MIPS_advance_loc8";
10044 /* GNU extensions. */
10045 case DW_CFA_GNU_window_save
:
10046 return "DW_CFA_GNU_window_save";
10047 case DW_CFA_GNU_args_size
:
10048 return "DW_CFA_GNU_args_size";
10049 case DW_CFA_GNU_negative_offset_extended
:
10050 return "DW_CFA_GNU_negative_offset_extended";
10052 return "DW_CFA_<unknown>";
10058 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
10062 print_spaces (indent
, f
);
10063 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
10064 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
10066 if (die
->parent
!= NULL
)
10068 print_spaces (indent
, f
);
10069 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
10070 die
->parent
->offset
);
10073 print_spaces (indent
, f
);
10074 fprintf_unfiltered (f
, " has children: %s\n",
10075 dwarf_bool_name (die
->child
!= NULL
));
10077 print_spaces (indent
, f
);
10078 fprintf_unfiltered (f
, " attributes:\n");
10080 for (i
= 0; i
< die
->num_attrs
; ++i
)
10082 print_spaces (indent
, f
);
10083 fprintf_unfiltered (f
, " %s (%s) ",
10084 dwarf_attr_name (die
->attrs
[i
].name
),
10085 dwarf_form_name (die
->attrs
[i
].form
));
10087 switch (die
->attrs
[i
].form
)
10089 case DW_FORM_ref_addr
:
10091 fprintf_unfiltered (f
, "address: ");
10092 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
10094 case DW_FORM_block2
:
10095 case DW_FORM_block4
:
10096 case DW_FORM_block
:
10097 case DW_FORM_block1
:
10098 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
10103 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
10104 (long) (DW_ADDR (&die
->attrs
[i
])));
10106 case DW_FORM_data1
:
10107 case DW_FORM_data2
:
10108 case DW_FORM_data4
:
10109 case DW_FORM_data8
:
10110 case DW_FORM_udata
:
10111 case DW_FORM_sdata
:
10112 fprintf_unfiltered (f
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
10115 if (DW_SIGNATURED_TYPE (&die
->attrs
[i
]) != NULL
)
10116 fprintf_unfiltered (f
, "signatured type, offset: 0x%x",
10117 DW_SIGNATURED_TYPE (&die
->attrs
[i
])->offset
);
10119 fprintf_unfiltered (f
, "signatured type, offset: unknown");
10121 case DW_FORM_string
:
10123 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
10124 DW_STRING (&die
->attrs
[i
])
10125 ? DW_STRING (&die
->attrs
[i
]) : "",
10126 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
10129 if (DW_UNSND (&die
->attrs
[i
]))
10130 fprintf_unfiltered (f
, "flag: TRUE");
10132 fprintf_unfiltered (f
, "flag: FALSE");
10134 case DW_FORM_indirect
:
10135 /* the reader will have reduced the indirect form to
10136 the "base form" so this form should not occur */
10137 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
10140 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
10141 die
->attrs
[i
].form
);
10144 fprintf_unfiltered (f
, "\n");
10149 dump_die_for_error (struct die_info
*die
)
10151 dump_die_shallow (gdb_stderr
, 0, die
);
10155 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
10157 int indent
= level
* 4;
10159 gdb_assert (die
!= NULL
);
10161 if (level
>= max_level
)
10164 dump_die_shallow (f
, indent
, die
);
10166 if (die
->child
!= NULL
)
10168 print_spaces (indent
, f
);
10169 fprintf_unfiltered (f
, " Children:");
10170 if (level
+ 1 < max_level
)
10172 fprintf_unfiltered (f
, "\n");
10173 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
10177 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
10181 if (die
->sibling
!= NULL
&& level
> 0)
10183 dump_die_1 (f
, level
, max_level
, die
->sibling
);
10187 /* This is called from the pdie macro in gdbinit.in.
10188 It's not static so gcc will keep a copy callable from gdb. */
10191 dump_die (struct die_info
*die
, int max_level
)
10193 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
10197 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
10201 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
10207 is_ref_attr (struct attribute
*attr
)
10209 switch (attr
->form
)
10211 case DW_FORM_ref_addr
:
10216 case DW_FORM_ref_udata
:
10223 static unsigned int
10224 dwarf2_get_ref_die_offset (struct attribute
*attr
)
10226 if (is_ref_attr (attr
))
10227 return DW_ADDR (attr
);
10229 complaint (&symfile_complaints
,
10230 _("unsupported die ref attribute form: '%s'"),
10231 dwarf_form_name (attr
->form
));
10235 /* Return the constant value held by the given attribute. Return -1
10236 if the value held by the attribute is not constant. */
10239 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
10241 if (attr
->form
== DW_FORM_sdata
)
10242 return DW_SND (attr
);
10243 else if (attr
->form
== DW_FORM_udata
10244 || attr
->form
== DW_FORM_data1
10245 || attr
->form
== DW_FORM_data2
10246 || attr
->form
== DW_FORM_data4
10247 || attr
->form
== DW_FORM_data8
)
10248 return DW_UNSND (attr
);
10251 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
10252 dwarf_form_name (attr
->form
));
10253 return default_value
;
10257 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
10258 unit and add it to our queue.
10259 The result is non-zero if PER_CU was queued, otherwise the result is zero
10260 meaning either PER_CU is already queued or it is already loaded. */
10263 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
10264 struct dwarf2_per_cu_data
*per_cu
)
10266 /* Mark the dependence relation so that we don't flush PER_CU
10268 dwarf2_add_dependence (this_cu
, per_cu
);
10270 /* If it's already on the queue, we have nothing to do. */
10271 if (per_cu
->queued
)
10274 /* If the compilation unit is already loaded, just mark it as
10276 if (per_cu
->cu
!= NULL
)
10278 per_cu
->cu
->last_used
= 0;
10282 /* Add it to the queue. */
10283 queue_comp_unit (per_cu
, this_cu
->objfile
);
10288 /* Follow reference or signature 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_or_sig (struct die_info
*src_die
, struct attribute
*attr
,
10294 struct dwarf2_cu
**ref_cu
)
10296 struct die_info
*die
;
10298 if (is_ref_attr (attr
))
10299 die
= follow_die_ref (src_die
, attr
, ref_cu
);
10300 else if (attr
->form
== DW_FORM_sig8
)
10301 die
= follow_die_sig (src_die
, attr
, ref_cu
);
10304 dump_die_for_error (src_die
);
10305 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
10306 (*ref_cu
)->objfile
->name
);
10312 /* Follow reference attribute ATTR of SRC_DIE.
10313 On entry *REF_CU is the CU of SRC_DIE.
10314 On exit *REF_CU is the CU of the result. */
10316 static struct die_info
*
10317 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
10318 struct dwarf2_cu
**ref_cu
)
10320 struct die_info
*die
;
10321 unsigned int offset
;
10322 struct die_info temp_die
;
10323 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
10325 gdb_assert (cu
->per_cu
!= NULL
);
10327 offset
= dwarf2_get_ref_die_offset (attr
);
10329 if (cu
->per_cu
->from_debug_types
)
10331 /* .debug_types CUs cannot reference anything outside their CU.
10332 If they need to, they have to reference a signatured type via
10334 if (! offset_in_cu_p (&cu
->header
, offset
))
10338 else if (! offset_in_cu_p (&cu
->header
, offset
))
10340 struct dwarf2_per_cu_data
*per_cu
;
10341 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
10343 /* If necessary, add it to the queue and load its DIEs. */
10344 if (maybe_queue_comp_unit (cu
, per_cu
))
10345 load_full_comp_unit (per_cu
, cu
->objfile
);
10347 target_cu
= per_cu
->cu
;
10352 *ref_cu
= target_cu
;
10353 temp_die
.offset
= offset
;
10354 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
10360 error (_("Dwarf Error: Cannot find DIE at 0x%x referenced from DIE "
10361 "at 0x%x [in module %s]"),
10362 offset
, src_die
->offset
, cu
->objfile
->name
);
10365 /* Follow the signature attribute ATTR in SRC_DIE.
10366 On entry *REF_CU is the CU of SRC_DIE.
10367 On exit *REF_CU is the CU of the result. */
10369 static struct die_info
*
10370 follow_die_sig (struct die_info
*src_die
, struct attribute
*attr
,
10371 struct dwarf2_cu
**ref_cu
)
10373 struct objfile
*objfile
= (*ref_cu
)->objfile
;
10374 struct die_info temp_die
;
10375 struct signatured_type
*sig_type
= DW_SIGNATURED_TYPE (attr
);
10376 struct dwarf2_cu
*sig_cu
;
10377 struct die_info
*die
;
10379 /* sig_type will be NULL if the signatured type is missing from
10381 if (sig_type
== NULL
)
10382 error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
10383 "at 0x%x [in module %s]"),
10384 src_die
->offset
, objfile
->name
);
10386 /* If necessary, add it to the queue and load its DIEs. */
10388 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
))
10389 read_signatured_type (objfile
, sig_type
);
10391 gdb_assert (sig_type
->per_cu
.cu
!= NULL
);
10393 sig_cu
= sig_type
->per_cu
.cu
;
10394 temp_die
.offset
= sig_cu
->header
.offset
+ sig_type
->type_offset
;
10395 die
= htab_find_with_hash (sig_cu
->die_hash
, &temp_die
, temp_die
.offset
);
10402 error (_("Dwarf Error: Cannot find signatured DIE at 0x%x referenced from DIE "
10403 "at 0x%x [in module %s]"),
10404 sig_type
->type_offset
, src_die
->offset
, objfile
->name
);
10407 /* Given an offset of a signatured type, return its signatured_type. */
10409 static struct signatured_type
*
10410 lookup_signatured_type_at_offset (struct objfile
*objfile
, unsigned int offset
)
10412 gdb_byte
*info_ptr
= dwarf2_per_objfile
->types
.buffer
+ offset
;
10413 unsigned int length
, initial_length_size
;
10414 unsigned int sig_offset
;
10415 struct signatured_type find_entry
, *type_sig
;
10417 length
= read_initial_length (objfile
->obfd
, info_ptr
, &initial_length_size
);
10418 sig_offset
= (initial_length_size
10420 + (initial_length_size
== 4 ? 4 : 8) /*debug_abbrev_offset*/
10421 + 1 /*address_size*/);
10422 find_entry
.signature
= bfd_get_64 (objfile
->obfd
, info_ptr
+ sig_offset
);
10423 type_sig
= htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
);
10425 /* This is only used to lookup previously recorded types.
10426 If we didn't find it, it's our bug. */
10427 gdb_assert (type_sig
!= NULL
);
10428 gdb_assert (offset
== type_sig
->offset
);
10433 /* Read in signatured type at OFFSET and build its CU and die(s). */
10436 read_signatured_type_at_offset (struct objfile
*objfile
,
10437 unsigned int offset
)
10439 struct signatured_type
*type_sig
;
10441 /* We have the section offset, but we need the signature to do the
10442 hash table lookup. */
10443 type_sig
= lookup_signatured_type_at_offset (objfile
, offset
);
10445 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10447 read_signatured_type (objfile
, type_sig
);
10449 gdb_assert (type_sig
->per_cu
.cu
!= NULL
);
10452 /* Read in a signatured type and build its CU and DIEs. */
10455 read_signatured_type (struct objfile
*objfile
,
10456 struct signatured_type
*type_sig
)
10458 gdb_byte
*types_ptr
= dwarf2_per_objfile
->types
.buffer
+ type_sig
->offset
;
10459 struct die_reader_specs reader_specs
;
10460 struct dwarf2_cu
*cu
;
10461 ULONGEST signature
;
10462 struct cleanup
*back_to
, *free_cu_cleanup
;
10463 struct attribute
*attr
;
10465 gdb_assert (type_sig
->per_cu
.cu
== NULL
);
10467 cu
= xmalloc (sizeof (struct dwarf2_cu
));
10468 memset (cu
, 0, sizeof (struct dwarf2_cu
));
10469 obstack_init (&cu
->comp_unit_obstack
);
10470 cu
->objfile
= objfile
;
10471 type_sig
->per_cu
.cu
= cu
;
10472 cu
->per_cu
= &type_sig
->per_cu
;
10474 /* If an error occurs while loading, release our storage. */
10475 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
10477 types_ptr
= read_type_comp_unit_head (&cu
->header
, &signature
,
10478 types_ptr
, objfile
->obfd
);
10479 gdb_assert (signature
== type_sig
->signature
);
10482 = htab_create_alloc_ex (cu
->header
.length
/ 12,
10486 &cu
->comp_unit_obstack
,
10487 hashtab_obstack_allocate
,
10488 dummy_obstack_deallocate
);
10490 dwarf2_read_abbrevs (cu
->objfile
->obfd
, cu
);
10491 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
10493 init_cu_die_reader (&reader_specs
, cu
);
10495 cu
->dies
= read_die_and_children (&reader_specs
, types_ptr
, &types_ptr
,
10498 /* We try not to read any attributes in this function, because not
10499 all objfiles needed for references have been loaded yet, and symbol
10500 table processing isn't initialized. But we have to set the CU language,
10501 or we won't be able to build types correctly. */
10502 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
10504 set_cu_language (DW_UNSND (attr
), cu
);
10506 set_cu_language (language_minimal
, cu
);
10508 do_cleanups (back_to
);
10510 /* We've successfully allocated this compilation unit. Let our caller
10511 clean it up when finished with it. */
10512 discard_cleanups (free_cu_cleanup
);
10514 type_sig
->per_cu
.cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
10515 dwarf2_per_objfile
->read_in_chain
= &type_sig
->per_cu
;
10518 /* Decode simple location descriptions.
10519 Given a pointer to a dwarf block that defines a location, compute
10520 the location and return the value.
10522 NOTE drow/2003-11-18: This function is called in two situations
10523 now: for the address of static or global variables (partial symbols
10524 only) and for offsets into structures which are expected to be
10525 (more or less) constant. The partial symbol case should go away,
10526 and only the constant case should remain. That will let this
10527 function complain more accurately. A few special modes are allowed
10528 without complaint for global variables (for instance, global
10529 register values and thread-local values).
10531 A location description containing no operations indicates that the
10532 object is optimized out. The return value is 0 for that case.
10533 FIXME drow/2003-11-16: No callers check for this case any more; soon all
10534 callers will only want a very basic result and this can become a
10537 Note that stack[0] is unused except as a default error return.
10538 Note that stack overflow is not yet handled. */
10541 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
10543 struct objfile
*objfile
= cu
->objfile
;
10544 struct comp_unit_head
*cu_header
= &cu
->header
;
10546 int size
= blk
->size
;
10547 gdb_byte
*data
= blk
->data
;
10548 CORE_ADDR stack
[64];
10550 unsigned int bytes_read
, unsnd
;
10594 stack
[++stacki
] = op
- DW_OP_lit0
;
10629 stack
[++stacki
] = op
- DW_OP_reg0
;
10631 dwarf2_complex_location_expr_complaint ();
10635 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10637 stack
[++stacki
] = unsnd
;
10639 dwarf2_complex_location_expr_complaint ();
10643 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
10648 case DW_OP_const1u
:
10649 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
10653 case DW_OP_const1s
:
10654 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
10658 case DW_OP_const2u
:
10659 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
10663 case DW_OP_const2s
:
10664 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
10668 case DW_OP_const4u
:
10669 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
10673 case DW_OP_const4s
:
10674 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
10679 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
10685 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
10690 stack
[stacki
+ 1] = stack
[stacki
];
10695 stack
[stacki
- 1] += stack
[stacki
];
10699 case DW_OP_plus_uconst
:
10700 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
10705 stack
[stacki
- 1] -= stack
[stacki
];
10710 /* If we're not the last op, then we definitely can't encode
10711 this using GDB's address_class enum. This is valid for partial
10712 global symbols, although the variable's address will be bogus
10715 dwarf2_complex_location_expr_complaint ();
10718 case DW_OP_GNU_push_tls_address
:
10719 /* The top of the stack has the offset from the beginning
10720 of the thread control block at which the variable is located. */
10721 /* Nothing should follow this operator, so the top of stack would
10723 /* This is valid for partial global symbols, but the variable's
10724 address will be bogus in the psymtab. */
10726 dwarf2_complex_location_expr_complaint ();
10729 case DW_OP_GNU_uninit
:
10733 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
10734 dwarf_stack_op_name (op
));
10735 return (stack
[stacki
]);
10738 return (stack
[stacki
]);
10741 /* memory allocation interface */
10743 static struct dwarf_block
*
10744 dwarf_alloc_block (struct dwarf2_cu
*cu
)
10746 struct dwarf_block
*blk
;
10748 blk
= (struct dwarf_block
*)
10749 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
10753 static struct abbrev_info
*
10754 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
10756 struct abbrev_info
*abbrev
;
10758 abbrev
= (struct abbrev_info
*)
10759 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
10760 memset (abbrev
, 0, sizeof (struct abbrev_info
));
10764 static struct die_info
*
10765 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
10767 struct die_info
*die
;
10768 size_t size
= sizeof (struct die_info
);
10771 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
10773 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
10774 memset (die
, 0, sizeof (struct die_info
));
10779 /* Macro support. */
10782 /* Return the full name of file number I in *LH's file name table.
10783 Use COMP_DIR as the name of the current directory of the
10784 compilation. The result is allocated using xmalloc; the caller is
10785 responsible for freeing it. */
10787 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
10789 /* Is the file number a valid index into the line header's file name
10790 table? Remember that file numbers start with one, not zero. */
10791 if (1 <= file
&& file
<= lh
->num_file_names
)
10793 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10795 if (IS_ABSOLUTE_PATH (fe
->name
))
10796 return xstrdup (fe
->name
);
10804 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10810 dir_len
= strlen (dir
);
10811 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
10812 strcpy (full_name
, dir
);
10813 full_name
[dir_len
] = '/';
10814 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
10818 return xstrdup (fe
->name
);
10823 /* The compiler produced a bogus file number. We can at least
10824 record the macro definitions made in the file, even if we
10825 won't be able to find the file by name. */
10826 char fake_name
[80];
10827 sprintf (fake_name
, "<bad macro file number %d>", file
);
10829 complaint (&symfile_complaints
,
10830 _("bad file number in macro information (%d)"),
10833 return xstrdup (fake_name
);
10838 static struct macro_source_file
*
10839 macro_start_file (int file
, int line
,
10840 struct macro_source_file
*current_file
,
10841 const char *comp_dir
,
10842 struct line_header
*lh
, struct objfile
*objfile
)
10844 /* The full name of this source file. */
10845 char *full_name
= file_full_name (file
, lh
, comp_dir
);
10847 /* We don't create a macro table for this compilation unit
10848 at all until we actually get a filename. */
10849 if (! pending_macros
)
10850 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
10851 objfile
->macro_cache
);
10853 if (! current_file
)
10854 /* If we have no current file, then this must be the start_file
10855 directive for the compilation unit's main source file. */
10856 current_file
= macro_set_main (pending_macros
, full_name
);
10858 current_file
= macro_include (current_file
, line
, full_name
);
10862 return current_file
;
10866 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10867 followed by a null byte. */
10869 copy_string (const char *buf
, int len
)
10871 char *s
= xmalloc (len
+ 1);
10872 memcpy (s
, buf
, len
);
10879 static const char *
10880 consume_improper_spaces (const char *p
, const char *body
)
10884 complaint (&symfile_complaints
,
10885 _("macro definition contains spaces in formal argument list:\n`%s'"),
10897 parse_macro_definition (struct macro_source_file
*file
, int line
,
10902 /* The body string takes one of two forms. For object-like macro
10903 definitions, it should be:
10905 <macro name> " " <definition>
10907 For function-like macro definitions, it should be:
10909 <macro name> "() " <definition>
10911 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10913 Spaces may appear only where explicitly indicated, and in the
10916 The Dwarf 2 spec says that an object-like macro's name is always
10917 followed by a space, but versions of GCC around March 2002 omit
10918 the space when the macro's definition is the empty string.
10920 The Dwarf 2 spec says that there should be no spaces between the
10921 formal arguments in a function-like macro's formal argument list,
10922 but versions of GCC around March 2002 include spaces after the
10926 /* Find the extent of the macro name. The macro name is terminated
10927 by either a space or null character (for an object-like macro) or
10928 an opening paren (for a function-like macro). */
10929 for (p
= body
; *p
; p
++)
10930 if (*p
== ' ' || *p
== '(')
10933 if (*p
== ' ' || *p
== '\0')
10935 /* It's an object-like macro. */
10936 int name_len
= p
- body
;
10937 char *name
= copy_string (body
, name_len
);
10938 const char *replacement
;
10941 replacement
= body
+ name_len
+ 1;
10944 dwarf2_macro_malformed_definition_complaint (body
);
10945 replacement
= body
+ name_len
;
10948 macro_define_object (file
, line
, name
, replacement
);
10952 else if (*p
== '(')
10954 /* It's a function-like macro. */
10955 char *name
= copy_string (body
, p
- body
);
10958 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
10962 p
= consume_improper_spaces (p
, body
);
10964 /* Parse the formal argument list. */
10965 while (*p
&& *p
!= ')')
10967 /* Find the extent of the current argument name. */
10968 const char *arg_start
= p
;
10970 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
10973 if (! *p
|| p
== arg_start
)
10974 dwarf2_macro_malformed_definition_complaint (body
);
10977 /* Make sure argv has room for the new argument. */
10978 if (argc
>= argv_size
)
10981 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
10984 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
10987 p
= consume_improper_spaces (p
, body
);
10989 /* Consume the comma, if present. */
10994 p
= consume_improper_spaces (p
, body
);
11003 /* Perfectly formed definition, no complaints. */
11004 macro_define_function (file
, line
, name
,
11005 argc
, (const char **) argv
,
11007 else if (*p
== '\0')
11009 /* Complain, but do define it. */
11010 dwarf2_macro_malformed_definition_complaint (body
);
11011 macro_define_function (file
, line
, name
,
11012 argc
, (const char **) argv
,
11016 /* Just complain. */
11017 dwarf2_macro_malformed_definition_complaint (body
);
11020 /* Just complain. */
11021 dwarf2_macro_malformed_definition_complaint (body
);
11027 for (i
= 0; i
< argc
; i
++)
11033 dwarf2_macro_malformed_definition_complaint (body
);
11038 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
11039 char *comp_dir
, bfd
*abfd
,
11040 struct dwarf2_cu
*cu
)
11042 gdb_byte
*mac_ptr
, *mac_end
;
11043 struct macro_source_file
*current_file
= 0;
11044 enum dwarf_macinfo_record_type macinfo_type
;
11045 int at_commandline
;
11047 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
11049 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
11053 /* First pass: Find the name of the base filename.
11054 This filename is needed in order to process all macros whose definition
11055 (or undefinition) comes from the command line. These macros are defined
11056 before the first DW_MACINFO_start_file entry, and yet still need to be
11057 associated to the base file.
11059 To determine the base file name, we scan the macro definitions until we
11060 reach the first DW_MACINFO_start_file entry. We then initialize
11061 CURRENT_FILE accordingly so that any macro definition found before the
11062 first DW_MACINFO_start_file can still be associated to the base file. */
11064 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11065 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
11066 + dwarf2_per_objfile
->macinfo
.size
;
11070 /* Do we at least have room for a macinfo type byte? */
11071 if (mac_ptr
>= mac_end
)
11073 /* Complaint is printed during the second pass as GDB will probably
11074 stop the first pass earlier upon finding DW_MACINFO_start_file. */
11078 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11081 switch (macinfo_type
)
11083 /* A zero macinfo type indicates the end of the macro
11088 case DW_MACINFO_define
:
11089 case DW_MACINFO_undef
:
11090 /* Only skip the data by MAC_PTR. */
11092 unsigned int bytes_read
;
11094 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11095 mac_ptr
+= bytes_read
;
11096 read_string (abfd
, mac_ptr
, &bytes_read
);
11097 mac_ptr
+= bytes_read
;
11101 case DW_MACINFO_start_file
:
11103 unsigned int bytes_read
;
11106 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11107 mac_ptr
+= bytes_read
;
11108 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11109 mac_ptr
+= bytes_read
;
11111 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
11116 case DW_MACINFO_end_file
:
11117 /* No data to skip by MAC_PTR. */
11120 case DW_MACINFO_vendor_ext
:
11121 /* Only skip the data by MAC_PTR. */
11123 unsigned int bytes_read
;
11125 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11126 mac_ptr
+= bytes_read
;
11127 read_string (abfd
, mac_ptr
, &bytes_read
);
11128 mac_ptr
+= bytes_read
;
11135 } while (macinfo_type
!= 0 && current_file
== NULL
);
11137 /* Second pass: Process all entries.
11139 Use the AT_COMMAND_LINE flag to determine whether we are still processing
11140 command-line macro definitions/undefinitions. This flag is unset when we
11141 reach the first DW_MACINFO_start_file entry. */
11143 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
11145 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
11146 GDB is still reading the definitions from command line. First
11147 DW_MACINFO_start_file will need to be ignored as it was already executed
11148 to create CURRENT_FILE for the main source holding also the command line
11149 definitions. On first met DW_MACINFO_start_file this flag is reset to
11150 normally execute all the remaining DW_MACINFO_start_file macinfos. */
11152 at_commandline
= 1;
11156 /* Do we at least have room for a macinfo type byte? */
11157 if (mac_ptr
>= mac_end
)
11159 dwarf2_macros_too_long_complaint ();
11163 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
11166 switch (macinfo_type
)
11168 /* A zero macinfo type indicates the end of the macro
11173 case DW_MACINFO_define
:
11174 case DW_MACINFO_undef
:
11176 unsigned int bytes_read
;
11180 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11181 mac_ptr
+= bytes_read
;
11182 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
11183 mac_ptr
+= bytes_read
;
11185 if (! current_file
)
11187 /* DWARF violation as no main source is present. */
11188 complaint (&symfile_complaints
,
11189 _("debug info with no main source gives macro %s "
11191 macinfo_type
== DW_MACINFO_define
?
11193 macinfo_type
== DW_MACINFO_undef
?
11194 _("undefinition") :
11195 _("something-or-other"), line
, body
);
11198 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11199 complaint (&symfile_complaints
,
11200 _("debug info gives %s macro %s with %s line %d: %s"),
11201 at_commandline
? _("command-line") : _("in-file"),
11202 macinfo_type
== DW_MACINFO_define
?
11204 macinfo_type
== DW_MACINFO_undef
?
11205 _("undefinition") :
11206 _("something-or-other"),
11207 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
11209 if (macinfo_type
== DW_MACINFO_define
)
11210 parse_macro_definition (current_file
, line
, body
);
11211 else if (macinfo_type
== DW_MACINFO_undef
)
11212 macro_undef (current_file
, line
, body
);
11216 case DW_MACINFO_start_file
:
11218 unsigned int bytes_read
;
11221 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11222 mac_ptr
+= bytes_read
;
11223 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11224 mac_ptr
+= bytes_read
;
11226 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
11227 complaint (&symfile_complaints
,
11228 _("debug info gives source %d included "
11229 "from %s at %s line %d"),
11230 file
, at_commandline
? _("command-line") : _("file"),
11231 line
== 0 ? _("zero") : _("non-zero"), line
);
11233 if (at_commandline
)
11235 /* This DW_MACINFO_start_file was executed in the pass one. */
11236 at_commandline
= 0;
11239 current_file
= macro_start_file (file
, line
,
11240 current_file
, comp_dir
,
11245 case DW_MACINFO_end_file
:
11246 if (! current_file
)
11247 complaint (&symfile_complaints
,
11248 _("macro debug info has an unmatched `close_file' directive"));
11251 current_file
= current_file
->included_by
;
11252 if (! current_file
)
11254 enum dwarf_macinfo_record_type next_type
;
11256 /* GCC circa March 2002 doesn't produce the zero
11257 type byte marking the end of the compilation
11258 unit. Complain if it's not there, but exit no
11261 /* Do we at least have room for a macinfo type byte? */
11262 if (mac_ptr
>= mac_end
)
11264 dwarf2_macros_too_long_complaint ();
11268 /* We don't increment mac_ptr here, so this is just
11270 next_type
= read_1_byte (abfd
, mac_ptr
);
11271 if (next_type
!= 0)
11272 complaint (&symfile_complaints
,
11273 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
11280 case DW_MACINFO_vendor_ext
:
11282 unsigned int bytes_read
;
11286 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
11287 mac_ptr
+= bytes_read
;
11288 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
11289 mac_ptr
+= bytes_read
;
11291 /* We don't recognize any vendor extensions. */
11295 } while (macinfo_type
!= 0);
11298 /* Check if the attribute's form is a DW_FORM_block*
11299 if so return true else false. */
11301 attr_form_is_block (struct attribute
*attr
)
11303 return (attr
== NULL
? 0 :
11304 attr
->form
== DW_FORM_block1
11305 || attr
->form
== DW_FORM_block2
11306 || attr
->form
== DW_FORM_block4
11307 || attr
->form
== DW_FORM_block
);
11310 /* Return non-zero if ATTR's value is a section offset --- classes
11311 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
11312 You may use DW_UNSND (attr) to retrieve such offsets.
11314 Section 7.5.4, "Attribute Encodings", explains that no attribute
11315 may have a value that belongs to more than one of these classes; it
11316 would be ambiguous if we did, because we use the same forms for all
11319 attr_form_is_section_offset (struct attribute
*attr
)
11321 return (attr
->form
== DW_FORM_data4
11322 || attr
->form
== DW_FORM_data8
);
11326 /* Return non-zero if ATTR's value falls in the 'constant' class, or
11327 zero otherwise. When this function returns true, you can apply
11328 dwarf2_get_attr_constant_value to it.
11330 However, note that for some attributes you must check
11331 attr_form_is_section_offset before using this test. DW_FORM_data4
11332 and DW_FORM_data8 are members of both the constant class, and of
11333 the classes that contain offsets into other debug sections
11334 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
11335 that, if an attribute's can be either a constant or one of the
11336 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
11337 taken as section offsets, not constants. */
11339 attr_form_is_constant (struct attribute
*attr
)
11341 switch (attr
->form
)
11343 case DW_FORM_sdata
:
11344 case DW_FORM_udata
:
11345 case DW_FORM_data1
:
11346 case DW_FORM_data2
:
11347 case DW_FORM_data4
:
11348 case DW_FORM_data8
:
11356 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
11357 struct dwarf2_cu
*cu
)
11359 if (attr_form_is_section_offset (attr
)
11360 /* ".debug_loc" may not exist at all, or the offset may be outside
11361 the section. If so, fall through to the complaint in the
11363 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
11365 struct dwarf2_loclist_baton
*baton
;
11367 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11368 sizeof (struct dwarf2_loclist_baton
));
11369 baton
->per_cu
= cu
->per_cu
;
11370 gdb_assert (baton
->per_cu
);
11372 /* We don't know how long the location list is, but make sure we
11373 don't run off the edge of the section. */
11374 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
11375 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
11376 baton
->base_address
= cu
->base_address
;
11377 if (cu
->base_known
== 0)
11378 complaint (&symfile_complaints
,
11379 _("Location list used without specifying the CU base address."));
11381 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
11382 SYMBOL_LOCATION_BATON (sym
) = baton
;
11386 struct dwarf2_locexpr_baton
*baton
;
11388 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
11389 sizeof (struct dwarf2_locexpr_baton
));
11390 baton
->per_cu
= cu
->per_cu
;
11391 gdb_assert (baton
->per_cu
);
11393 if (attr_form_is_block (attr
))
11395 /* Note that we're just copying the block's data pointer
11396 here, not the actual data. We're still pointing into the
11397 info_buffer for SYM's objfile; right now we never release
11398 that buffer, but when we do clean up properly this may
11400 baton
->size
= DW_BLOCK (attr
)->size
;
11401 baton
->data
= DW_BLOCK (attr
)->data
;
11405 dwarf2_invalid_attrib_class_complaint ("location description",
11406 SYMBOL_NATURAL_NAME (sym
));
11408 baton
->data
= NULL
;
11411 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
11412 SYMBOL_LOCATION_BATON (sym
) = baton
;
11416 /* Return the OBJFILE associated with the compilation unit CU. */
11419 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
11421 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11423 /* Return the master objfile, so that we can report and look up the
11424 correct file containing this variable. */
11425 if (objfile
->separate_debug_objfile_backlink
)
11426 objfile
= objfile
->separate_debug_objfile_backlink
;
11431 /* Return the address size given in the compilation unit header for CU. */
11434 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
11437 return per_cu
->cu
->header
.addr_size
;
11440 /* If the CU is not currently read in, we re-read its header. */
11441 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
11442 struct dwarf2_per_objfile
*per_objfile
11443 = objfile_data (objfile
, dwarf2_objfile_data_key
);
11444 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
11446 struct comp_unit_head cu_header
;
11447 memset (&cu_header
, 0, sizeof cu_header
);
11448 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
11449 return cu_header
.addr_size
;
11453 /* Locate the .debug_info compilation unit from CU's objfile which contains
11454 the DIE at OFFSET. Raises an error on failure. */
11456 static struct dwarf2_per_cu_data
*
11457 dwarf2_find_containing_comp_unit (unsigned int offset
,
11458 struct objfile
*objfile
)
11460 struct dwarf2_per_cu_data
*this_cu
;
11464 high
= dwarf2_per_objfile
->n_comp_units
- 1;
11467 int mid
= low
+ (high
- low
) / 2;
11468 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
11473 gdb_assert (low
== high
);
11474 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
11477 error (_("Dwarf Error: could not find partial DIE containing "
11478 "offset 0x%lx [in module %s]"),
11479 (long) offset
, bfd_get_filename (objfile
->obfd
));
11481 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
11482 return dwarf2_per_objfile
->all_comp_units
[low
-1];
11486 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
11487 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
11488 && offset
>= this_cu
->offset
+ this_cu
->length
)
11489 error (_("invalid dwarf2 offset %u"), offset
);
11490 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
11495 /* Locate the compilation unit from OBJFILE which is located at exactly
11496 OFFSET. Raises an error on failure. */
11498 static struct dwarf2_per_cu_data
*
11499 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
11501 struct dwarf2_per_cu_data
*this_cu
;
11502 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
11503 if (this_cu
->offset
!= offset
)
11504 error (_("no compilation unit with offset %u."), offset
);
11508 /* Malloc space for a dwarf2_cu for OBJFILE and initialize it. */
11510 static struct dwarf2_cu
*
11511 alloc_one_comp_unit (struct objfile
*objfile
)
11513 struct dwarf2_cu
*cu
= xcalloc (1, sizeof (struct dwarf2_cu
));
11514 cu
->objfile
= objfile
;
11515 obstack_init (&cu
->comp_unit_obstack
);
11519 /* Release one cached compilation unit, CU. We unlink it from the tree
11520 of compilation units, but we don't remove it from the read_in_chain;
11521 the caller is responsible for that.
11522 NOTE: DATA is a void * because this function is also used as a
11523 cleanup routine. */
11526 free_one_comp_unit (void *data
)
11528 struct dwarf2_cu
*cu
= data
;
11530 if (cu
->per_cu
!= NULL
)
11531 cu
->per_cu
->cu
= NULL
;
11534 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11539 /* This cleanup function is passed the address of a dwarf2_cu on the stack
11540 when we're finished with it. We can't free the pointer itself, but be
11541 sure to unlink it from the cache. Also release any associated storage
11542 and perform cache maintenance.
11544 Only used during partial symbol parsing. */
11547 free_stack_comp_unit (void *data
)
11549 struct dwarf2_cu
*cu
= data
;
11551 obstack_free (&cu
->comp_unit_obstack
, NULL
);
11552 cu
->partial_dies
= NULL
;
11554 if (cu
->per_cu
!= NULL
)
11556 /* This compilation unit is on the stack in our caller, so we
11557 should not xfree it. Just unlink it. */
11558 cu
->per_cu
->cu
= NULL
;
11561 /* If we had a per-cu pointer, then we may have other compilation
11562 units loaded, so age them now. */
11563 age_cached_comp_units ();
11567 /* Free all cached compilation units. */
11570 free_cached_comp_units (void *data
)
11572 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11574 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11575 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11576 while (per_cu
!= NULL
)
11578 struct dwarf2_per_cu_data
*next_cu
;
11580 next_cu
= per_cu
->cu
->read_in_chain
;
11582 free_one_comp_unit (per_cu
->cu
);
11583 *last_chain
= next_cu
;
11589 /* Increase the age counter on each cached compilation unit, and free
11590 any that are too old. */
11593 age_cached_comp_units (void)
11595 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11597 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
11598 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11599 while (per_cu
!= NULL
)
11601 per_cu
->cu
->last_used
++;
11602 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
11603 dwarf2_mark (per_cu
->cu
);
11604 per_cu
= per_cu
->cu
->read_in_chain
;
11607 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11608 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11609 while (per_cu
!= NULL
)
11611 struct dwarf2_per_cu_data
*next_cu
;
11613 next_cu
= per_cu
->cu
->read_in_chain
;
11615 if (!per_cu
->cu
->mark
)
11617 free_one_comp_unit (per_cu
->cu
);
11618 *last_chain
= next_cu
;
11621 last_chain
= &per_cu
->cu
->read_in_chain
;
11627 /* Remove a single compilation unit from the cache. */
11630 free_one_cached_comp_unit (void *target_cu
)
11632 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
11634 per_cu
= dwarf2_per_objfile
->read_in_chain
;
11635 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
11636 while (per_cu
!= NULL
)
11638 struct dwarf2_per_cu_data
*next_cu
;
11640 next_cu
= per_cu
->cu
->read_in_chain
;
11642 if (per_cu
->cu
== target_cu
)
11644 free_one_comp_unit (per_cu
->cu
);
11645 *last_chain
= next_cu
;
11649 last_chain
= &per_cu
->cu
->read_in_chain
;
11655 /* Release all extra memory associated with OBJFILE. */
11658 dwarf2_free_objfile (struct objfile
*objfile
)
11660 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
11662 if (dwarf2_per_objfile
== NULL
)
11665 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
11666 free_cached_comp_units (NULL
);
11668 /* Everything else should be on the objfile obstack. */
11671 /* A pair of DIE offset and GDB type pointer. We store these
11672 in a hash table separate from the DIEs, and preserve them
11673 when the DIEs are flushed out of cache. */
11675 struct dwarf2_offset_and_type
11677 unsigned int offset
;
11681 /* Hash function for a dwarf2_offset_and_type. */
11684 offset_and_type_hash (const void *item
)
11686 const struct dwarf2_offset_and_type
*ofs
= item
;
11687 return ofs
->offset
;
11690 /* Equality function for a dwarf2_offset_and_type. */
11693 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
11695 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
11696 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
11697 return ofs_lhs
->offset
== ofs_rhs
->offset
;
11700 /* Set the type associated with DIE to TYPE. Save it in CU's hash
11701 table if necessary. For convenience, return TYPE. */
11703 static struct type
*
11704 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
11706 struct dwarf2_offset_and_type
**slot
, ofs
;
11708 if (cu
->type_hash
== NULL
)
11710 gdb_assert (cu
->per_cu
!= NULL
);
11711 cu
->per_cu
->type_hash
11712 = htab_create_alloc_ex (cu
->header
.length
/ 24,
11713 offset_and_type_hash
,
11714 offset_and_type_eq
,
11716 &cu
->objfile
->objfile_obstack
,
11717 hashtab_obstack_allocate
,
11718 dummy_obstack_deallocate
);
11719 cu
->type_hash
= cu
->per_cu
->type_hash
;
11722 ofs
.offset
= die
->offset
;
11724 slot
= (struct dwarf2_offset_and_type
**)
11725 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
11726 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
11731 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
11732 not have a saved type. */
11734 static struct type
*
11735 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
11737 struct dwarf2_offset_and_type
*slot
, ofs
;
11738 htab_t type_hash
= cu
->type_hash
;
11740 if (type_hash
== NULL
)
11743 ofs
.offset
= die
->offset
;
11744 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
11751 /* Add a dependence relationship from CU to REF_PER_CU. */
11754 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
11755 struct dwarf2_per_cu_data
*ref_per_cu
)
11759 if (cu
->dependencies
== NULL
)
11761 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
11762 NULL
, &cu
->comp_unit_obstack
,
11763 hashtab_obstack_allocate
,
11764 dummy_obstack_deallocate
);
11766 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
11768 *slot
= ref_per_cu
;
11771 /* Subroutine of dwarf2_mark to pass to htab_traverse.
11772 Set the mark field in every compilation unit in the
11773 cache that we must keep because we are keeping CU. */
11776 dwarf2_mark_helper (void **slot
, void *data
)
11778 struct dwarf2_per_cu_data
*per_cu
;
11780 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
11781 if (per_cu
->cu
->mark
)
11783 per_cu
->cu
->mark
= 1;
11785 if (per_cu
->cu
->dependencies
!= NULL
)
11786 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11791 /* Set the mark field in CU and in every other compilation unit in the
11792 cache that we must keep because we are keeping CU. */
11795 dwarf2_mark (struct dwarf2_cu
*cu
)
11800 if (cu
->dependencies
!= NULL
)
11801 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11805 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
11809 per_cu
->cu
->mark
= 0;
11810 per_cu
= per_cu
->cu
->read_in_chain
;
11814 /* Trivial hash function for partial_die_info: the hash value of a DIE
11815 is its offset in .debug_info for this objfile. */
11818 partial_die_hash (const void *item
)
11820 const struct partial_die_info
*part_die
= item
;
11821 return part_die
->offset
;
11824 /* Trivial comparison function for partial_die_info structures: two DIEs
11825 are equal if they have the same offset. */
11828 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
11830 const struct partial_die_info
*part_die_lhs
= item_lhs
;
11831 const struct partial_die_info
*part_die_rhs
= item_rhs
;
11832 return part_die_lhs
->offset
== part_die_rhs
->offset
;
11835 static struct cmd_list_element
*set_dwarf2_cmdlist
;
11836 static struct cmd_list_element
*show_dwarf2_cmdlist
;
11839 set_dwarf2_cmd (char *args
, int from_tty
)
11841 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
11845 show_dwarf2_cmd (char *args
, int from_tty
)
11847 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
11850 /* If section described by INFO was mmapped, munmap it now. */
11853 munmap_section_buffer (struct dwarf2_section_info
*info
)
11855 if (info
->was_mmapped
)
11858 intptr_t begin
= (intptr_t) info
->buffer
;
11859 intptr_t map_begin
= begin
& ~(pagesize
- 1);
11860 size_t map_length
= info
->size
+ begin
- map_begin
;
11861 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
11863 /* Without HAVE_MMAP, we should never be here to begin with. */
11869 /* munmap debug sections for OBJFILE, if necessary. */
11872 dwarf2_per_objfile_free (struct objfile
*objfile
, void *d
)
11874 struct dwarf2_per_objfile
*data
= d
;
11875 munmap_section_buffer (&data
->info
);
11876 munmap_section_buffer (&data
->abbrev
);
11877 munmap_section_buffer (&data
->line
);
11878 munmap_section_buffer (&data
->str
);
11879 munmap_section_buffer (&data
->macinfo
);
11880 munmap_section_buffer (&data
->ranges
);
11881 munmap_section_buffer (&data
->loc
);
11882 munmap_section_buffer (&data
->frame
);
11883 munmap_section_buffer (&data
->eh_frame
);
11886 void _initialize_dwarf2_read (void);
11889 _initialize_dwarf2_read (void)
11891 dwarf2_objfile_data_key
11892 = register_objfile_data_with_cleanup (NULL
, dwarf2_per_objfile_free
);
11894 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
11895 Set DWARF 2 specific variables.\n\
11896 Configure DWARF 2 variables such as the cache size"),
11897 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
11898 0/*allow-unknown*/, &maintenance_set_cmdlist
);
11900 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
11901 Show DWARF 2 specific variables\n\
11902 Show DWARF 2 variables such as the cache size"),
11903 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
11904 0/*allow-unknown*/, &maintenance_show_cmdlist
);
11906 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
11907 &dwarf2_max_cache_age
, _("\
11908 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
11909 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
11910 A higher limit means that cached compilation units will be stored\n\
11911 in memory longer, and more total memory will be used. Zero disables\n\
11912 caching, which can slow down startup."),
11914 show_dwarf2_max_cache_age
,
11915 &set_dwarf2_cmdlist
,
11916 &show_dwarf2_cmdlist
);
11918 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
11919 Set debugging of the dwarf2 DIE reader."), _("\
11920 Show debugging of the dwarf2 DIE reader."), _("\
11921 When enabled (non-zero), DIEs are dumped after they are read in.\n\
11922 The value is the maximum depth to print."),
11925 &setdebuglist
, &showdebuglist
);