1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 2004, 2005, 2006, 2007, 2008, 2009
5 Free Software Foundation, Inc.
7 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
8 Inc. with support from Florida State University (under contract
9 with the Ada Joint Program Office), and Silicon Graphics, Inc.
10 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
11 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
14 This file is part of GDB.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 3 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>. */
37 #include "expression.h"
38 #include "filenames.h" /* for DOSish file names */
41 #include "complaints.h"
43 #include "dwarf2expr.h"
44 #include "dwarf2loc.h"
45 #include "cp-support.h"
53 #include "gdb_string.h"
54 #include "gdb_assert.h"
55 #include <sys/types.h>
64 /* .debug_info header for a compilation unit
65 Because of alignment constraints, this structure has padding and cannot
66 be mapped directly onto the beginning of the .debug_info section. */
67 typedef struct comp_unit_header
69 unsigned int length
; /* length of the .debug_info
71 unsigned short version
; /* version number -- 2 for DWARF
73 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
74 unsigned char addr_size
; /* byte size of an address -- 4 */
77 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
80 /* .debug_pubnames header
81 Because of alignment constraints, this structure has padding and cannot
82 be mapped directly onto the beginning of the .debug_info section. */
83 typedef struct pubnames_header
85 unsigned int length
; /* length of the .debug_pubnames
87 unsigned char version
; /* version number -- 2 for DWARF
89 unsigned int info_offset
; /* offset into .debug_info section */
90 unsigned int info_size
; /* byte size of .debug_info section
94 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
96 /* .debug_pubnames header
97 Because of alignment constraints, this structure has padding and cannot
98 be mapped directly onto the beginning of the .debug_info section. */
99 typedef struct aranges_header
101 unsigned int length
; /* byte len of the .debug_aranges
103 unsigned short version
; /* version number -- 2 for DWARF
105 unsigned int info_offset
; /* offset into .debug_info section */
106 unsigned char addr_size
; /* byte size of an address */
107 unsigned char seg_size
; /* byte size of segment descriptor */
110 #define _ACTUAL_ARANGES_HEADER_SIZE 12
112 /* .debug_line statement program prologue
113 Because of alignment constraints, this structure has padding and cannot
114 be mapped directly onto the beginning of the .debug_info section. */
115 typedef struct statement_prologue
117 unsigned int total_length
; /* byte length of the statement
119 unsigned short version
; /* version number -- 2 for DWARF
121 unsigned int prologue_length
; /* # bytes between prologue &
123 unsigned char minimum_instruction_length
; /* byte size of
125 unsigned char default_is_stmt
; /* initial value of is_stmt
128 unsigned char line_range
;
129 unsigned char opcode_base
; /* number assigned to first special
131 unsigned char *standard_opcode_lengths
;
135 /* When non-zero, dump DIEs after they are read in. */
136 static int dwarf2_die_debug
= 0;
140 /* When set, the file that we're processing is known to have debugging
141 info for C++ namespaces. GCC 3.3.x did not produce this information,
142 but later versions do. */
144 static int processing_has_namespace_info
;
146 static const struct objfile_data
*dwarf2_objfile_data_key
;
148 struct dwarf2_section_info
156 struct dwarf2_per_objfile
158 struct dwarf2_section_info info
;
159 struct dwarf2_section_info abbrev
;
160 struct dwarf2_section_info line
;
161 struct dwarf2_section_info pubnames
;
162 struct dwarf2_section_info aranges
;
163 struct dwarf2_section_info loc
;
164 struct dwarf2_section_info macinfo
;
165 struct dwarf2_section_info str
;
166 struct dwarf2_section_info ranges
;
167 struct dwarf2_section_info frame
;
168 struct dwarf2_section_info eh_frame
;
170 /* A list of all the compilation units. This is used to locate
171 the target compilation unit of a particular reference. */
172 struct dwarf2_per_cu_data
**all_comp_units
;
174 /* The number of compilation units in ALL_COMP_UNITS. */
177 /* A chain of compilation units that are currently read in, so that
178 they can be freed later. */
179 struct dwarf2_per_cu_data
*read_in_chain
;
181 /* A flag indicating wether this objfile has a section loaded at a
183 int has_section_at_zero
;
186 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
188 /* names of the debugging sections */
190 /* Note that if the debugging section has been compressed, it might
191 have a name like .zdebug_info. */
193 #define INFO_SECTION "debug_info"
194 #define ABBREV_SECTION "debug_abbrev"
195 #define LINE_SECTION "debug_line"
196 #define PUBNAMES_SECTION "debug_pubnames"
197 #define ARANGES_SECTION "debug_aranges"
198 #define LOC_SECTION "debug_loc"
199 #define MACINFO_SECTION "debug_macinfo"
200 #define STR_SECTION "debug_str"
201 #define RANGES_SECTION "debug_ranges"
202 #define FRAME_SECTION "debug_frame"
203 #define EH_FRAME_SECTION "eh_frame"
205 /* local data types */
207 /* We hold several abbreviation tables in memory at the same time. */
208 #ifndef ABBREV_HASH_SIZE
209 #define ABBREV_HASH_SIZE 121
212 /* The data in a compilation unit header, after target2host
213 translation, looks like this. */
214 struct comp_unit_head
218 unsigned char addr_size
;
219 unsigned char signed_addr_p
;
220 unsigned int abbrev_offset
;
222 /* Size of file offsets; either 4 or 8. */
223 unsigned int offset_size
;
225 /* Size of the length field; either 4 or 12. */
226 unsigned int initial_length_size
;
228 /* Offset to the first byte of this compilation unit header in the
229 .debug_info section, for resolving relative reference dies. */
232 /* Offset to first die in this cu from the start of the cu.
233 This will be the first byte following the compilation unit header. */
234 unsigned int first_die_offset
;
237 /* Internal state when decoding a particular compilation unit. */
240 /* The objfile containing this compilation unit. */
241 struct objfile
*objfile
;
243 /* The header of the compilation unit. */
244 struct comp_unit_head header
;
246 /* Base address of this compilation unit. */
247 CORE_ADDR base_address
;
249 /* Non-zero if base_address has been set. */
252 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
254 /* The language we are debugging. */
255 enum language language
;
256 const struct language_defn
*language_defn
;
258 const char *producer
;
260 /* The generic symbol table building routines have separate lists for
261 file scope symbols and all all other scopes (local scopes). So
262 we need to select the right one to pass to add_symbol_to_list().
263 We do it by keeping a pointer to the correct list in list_in_scope.
265 FIXME: The original dwarf code just treated the file scope as the
266 first local scope, and all other local scopes as nested local
267 scopes, and worked fine. Check to see if we really need to
268 distinguish these in buildsym.c. */
269 struct pending
**list_in_scope
;
271 /* DWARF abbreviation table associated with this compilation unit. */
272 struct abbrev_info
**dwarf2_abbrevs
;
274 /* Storage for the abbrev table. */
275 struct obstack abbrev_obstack
;
277 /* Hash table holding all the loaded partial DIEs. */
280 /* `.debug_ranges' offset for this `DW_TAG_compile_unit' DIE. */
281 unsigned int ranges_offset
;
283 /* Storage for things with the same lifetime as this read-in compilation
284 unit, including partial DIEs. */
285 struct obstack comp_unit_obstack
;
287 /* When multiple dwarf2_cu structures are living in memory, this field
288 chains them all together, so that they can be released efficiently.
289 We will probably also want a generation counter so that most-recently-used
290 compilation units are cached... */
291 struct dwarf2_per_cu_data
*read_in_chain
;
293 /* Backchain to our per_cu entry if the tree has been built. */
294 struct dwarf2_per_cu_data
*per_cu
;
296 /* Pointer to the die -> type map. Although it is stored
297 permanently in per_cu, we copy it here to avoid double
301 /* How many compilation units ago was this CU last referenced? */
304 /* A hash table of die offsets for following references. */
307 /* Full DIEs if read in. */
308 struct die_info
*dies
;
310 /* A set of pointers to dwarf2_per_cu_data objects for compilation
311 units referenced by this one. Only set during full symbol processing;
312 partial symbol tables do not have dependencies. */
315 /* Header data from the line table, during full symbol processing. */
316 struct line_header
*line_header
;
318 /* Mark used when releasing cached dies. */
319 unsigned int mark
: 1;
321 /* This flag will be set if this compilation unit might include
322 inter-compilation-unit references. */
323 unsigned int has_form_ref_addr
: 1;
325 /* This flag will be set if this compilation unit includes any
326 DW_TAG_namespace DIEs. If we know that there are explicit
327 DIEs for namespaces, we don't need to try to infer them
328 from mangled names. */
329 unsigned int has_namespace_info
: 1;
331 /* Field `ranges_offset' is filled in; flag as the value may be zero. */
332 unsigned int has_ranges_offset
: 1;
335 /* Persistent data held for a compilation unit, even when not
336 processing it. We put a pointer to this structure in the
337 read_symtab_private field of the psymtab. If we encounter
338 inter-compilation-unit references, we also maintain a sorted
339 list of all compilation units. */
341 struct dwarf2_per_cu_data
343 /* The start offset and length of this compilation unit. 2**30-1
344 bytes should suffice to store the length of any compilation unit
345 - if it doesn't, GDB will fall over anyway.
346 NOTE: Unlike comp_unit_head.length, this length includes
347 initial_length_size. */
349 unsigned int length
: 30;
351 /* Flag indicating this compilation unit will be read in before
352 any of the current compilation units are processed. */
353 unsigned int queued
: 1;
355 /* This flag will be set if we need to load absolutely all DIEs
356 for this compilation unit, instead of just the ones we think
357 are interesting. It gets set if we look for a DIE in the
358 hash table and don't find it. */
359 unsigned int load_all_dies
: 1;
361 /* Set iff currently read in. */
362 struct dwarf2_cu
*cu
;
364 /* If full symbols for this CU have been read in, then this field
365 holds a map of DIE offsets to types. It isn't always possible
366 to reconstruct this information later, so we have to preserve
370 /* The partial symbol table associated with this compilation unit,
371 or NULL for partial units (which do not have an associated
373 struct partial_symtab
*psymtab
;
376 /* The line number information for a compilation unit (found in the
377 .debug_line section) begins with a "statement program header",
378 which contains the following information. */
381 unsigned int total_length
;
382 unsigned short version
;
383 unsigned int header_length
;
384 unsigned char minimum_instruction_length
;
385 unsigned char default_is_stmt
;
387 unsigned char line_range
;
388 unsigned char opcode_base
;
390 /* standard_opcode_lengths[i] is the number of operands for the
391 standard opcode whose value is i. This means that
392 standard_opcode_lengths[0] is unused, and the last meaningful
393 element is standard_opcode_lengths[opcode_base - 1]. */
394 unsigned char *standard_opcode_lengths
;
396 /* The include_directories table. NOTE! These strings are not
397 allocated with xmalloc; instead, they are pointers into
398 debug_line_buffer. If you try to free them, `free' will get
400 unsigned int num_include_dirs
, include_dirs_size
;
403 /* The file_names table. NOTE! These strings are not allocated
404 with xmalloc; instead, they are pointers into debug_line_buffer.
405 Don't try to free them directly. */
406 unsigned int num_file_names
, file_names_size
;
410 unsigned int dir_index
;
411 unsigned int mod_time
;
413 int included_p
; /* Non-zero if referenced by the Line Number Program. */
414 struct symtab
*symtab
; /* The associated symbol table, if any. */
417 /* The start and end of the statement program following this
418 header. These point into dwarf2_per_objfile->line_buffer. */
419 gdb_byte
*statement_program_start
, *statement_program_end
;
422 /* When we construct a partial symbol table entry we only
423 need this much information. */
424 struct partial_die_info
426 /* Offset of this DIE. */
429 /* DWARF-2 tag for this DIE. */
430 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
432 /* Language code associated with this DIE. This is only used
433 for the compilation unit DIE. */
434 unsigned int language
: 8;
436 /* Assorted flags describing the data found in this DIE. */
437 unsigned int has_children
: 1;
438 unsigned int is_external
: 1;
439 unsigned int is_declaration
: 1;
440 unsigned int has_type
: 1;
441 unsigned int has_specification
: 1;
442 unsigned int has_stmt_list
: 1;
443 unsigned int has_pc_info
: 1;
445 /* Flag set if the SCOPE field of this structure has been
447 unsigned int scope_set
: 1;
449 /* Flag set if the DIE has a byte_size attribute. */
450 unsigned int has_byte_size
: 1;
452 /* The name of this DIE. Normally the value of DW_AT_name, but
453 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
458 /* The scope to prepend to our children. This is generally
459 allocated on the comp_unit_obstack, so will disappear
460 when this compilation unit leaves the cache. */
463 /* The location description associated with this DIE, if any. */
464 struct dwarf_block
*locdesc
;
466 /* If HAS_PC_INFO, the PC range associated with this DIE. */
470 /* Pointer into the info_buffer pointing at the target of
471 DW_AT_sibling, if any. */
474 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
475 DW_AT_specification (or DW_AT_abstract_origin or
477 unsigned int spec_offset
;
479 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
480 unsigned int line_offset
;
482 /* Pointers to this DIE's parent, first child, and next sibling,
484 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
487 /* This data structure holds the information of an abbrev. */
490 unsigned int number
; /* number identifying abbrev */
491 enum dwarf_tag tag
; /* dwarf tag */
492 unsigned short has_children
; /* boolean */
493 unsigned short num_attrs
; /* number of attributes */
494 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
495 struct abbrev_info
*next
; /* next in chain */
500 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
501 ENUM_BITFIELD(dwarf_form
) form
: 16;
504 /* Additional GDB-specific attribute forms. */
507 /* A string which has been updated to GDB's internal
508 representation (e.g. converted to canonical form) and does not
509 need to be updated again. */
510 GDB_FORM_cached_string
= 0xff
513 /* Attributes have a name and a value */
516 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
517 ENUM_BITFIELD(dwarf_form
) form
: 16;
521 struct dwarf_block
*blk
;
529 /* This data structure holds a complete die structure. */
532 /* DWARF-2 tag for this DIE. */
533 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
535 /* Number of attributes */
536 unsigned short num_attrs
;
541 /* Offset in .debug_info section */
544 /* The dies in a compilation unit form an n-ary tree. PARENT
545 points to this die's parent; CHILD points to the first child of
546 this node; and all the children of a given node are chained
547 together via their SIBLING fields, terminated by a die whose
549 struct die_info
*child
; /* Its first child, if any. */
550 struct die_info
*sibling
; /* Its next sibling, if any. */
551 struct die_info
*parent
; /* Its parent, if any. */
553 /* An array of attributes, with NUM_ATTRS elements. There may be
554 zero, but it's not common and zero-sized arrays are not
555 sufficiently portable C. */
556 struct attribute attrs
[1];
559 struct function_range
562 CORE_ADDR lowpc
, highpc
;
564 struct function_range
*next
;
567 /* Get at parts of an attribute structure */
569 #define DW_STRING(attr) ((attr)->u.str)
570 #define DW_UNSND(attr) ((attr)->u.unsnd)
571 #define DW_BLOCK(attr) ((attr)->u.blk)
572 #define DW_SND(attr) ((attr)->u.snd)
573 #define DW_ADDR(attr) ((attr)->u.addr)
575 /* Blocks are a bunch of untyped bytes. */
582 #ifndef ATTR_ALLOC_CHUNK
583 #define ATTR_ALLOC_CHUNK 4
586 /* Allocate fields for structs, unions and enums in this size. */
587 #ifndef DW_FIELD_ALLOC_CHUNK
588 #define DW_FIELD_ALLOC_CHUNK 4
591 /* A zeroed version of a partial die for initialization purposes. */
592 static struct partial_die_info zeroed_partial_die
;
594 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
595 but this would require a corresponding change in unpack_field_as_long
597 static int bits_per_byte
= 8;
599 /* The routines that read and process dies for a C struct or C++ class
600 pass lists of data member fields and lists of member function fields
601 in an instance of a field_info structure, as defined below. */
604 /* List of data member and baseclasses fields. */
607 struct nextfield
*next
;
614 /* Number of fields. */
617 /* Number of baseclasses. */
620 /* Set if the accesibility of one of the fields is not public. */
621 int non_public_fields
;
623 /* Member function fields array, entries are allocated in the order they
624 are encountered in the object file. */
627 struct nextfnfield
*next
;
628 struct fn_field fnfield
;
632 /* Member function fieldlist array, contains name of possibly overloaded
633 member function, number of overloaded member functions and a pointer
634 to the head of the member function field chain. */
639 struct nextfnfield
*head
;
643 /* Number of entries in the fnfieldlists array. */
647 /* One item on the queue of compilation units to read in full symbols
649 struct dwarf2_queue_item
651 struct dwarf2_per_cu_data
*per_cu
;
652 struct dwarf2_queue_item
*next
;
655 /* The current queue. */
656 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
658 /* Loaded secondary compilation units are kept in memory until they
659 have not been referenced for the processing of this many
660 compilation units. Set this to zero to disable caching. Cache
661 sizes of up to at least twenty will improve startup time for
662 typical inter-CU-reference binaries, at an obvious memory cost. */
663 static int dwarf2_max_cache_age
= 5;
665 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
666 struct cmd_list_element
*c
, const char *value
)
668 fprintf_filtered (file
, _("\
669 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
674 /* Various complaints about symbol reading that don't abort the process */
677 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
679 complaint (&symfile_complaints
,
680 _("statement list doesn't fit in .debug_line section"));
684 dwarf2_debug_line_missing_file_complaint (void)
686 complaint (&symfile_complaints
,
687 _(".debug_line section has line data without a file"));
691 dwarf2_debug_line_missing_end_sequence_complaint (void)
693 complaint (&symfile_complaints
,
694 _(".debug_line section has line program sequence without an end"));
698 dwarf2_complex_location_expr_complaint (void)
700 complaint (&symfile_complaints
, _("location expression too complex"));
704 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
707 complaint (&symfile_complaints
,
708 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
713 dwarf2_macros_too_long_complaint (void)
715 complaint (&symfile_complaints
,
716 _("macro info runs off end of `.debug_macinfo' section"));
720 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
722 complaint (&symfile_complaints
,
723 _("macro debug info contains a malformed macro definition:\n`%s'"),
728 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
730 complaint (&symfile_complaints
,
731 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
734 /* local function prototypes */
736 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
739 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
742 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
745 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
746 struct partial_die_info
*,
747 struct partial_symtab
*);
749 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
751 static void scan_partial_symbols (struct partial_die_info
*,
752 CORE_ADDR
*, CORE_ADDR
*,
753 int, struct dwarf2_cu
*);
755 static void add_partial_symbol (struct partial_die_info
*,
758 static int pdi_needs_namespace (enum dwarf_tag tag
);
760 static void add_partial_namespace (struct partial_die_info
*pdi
,
761 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
762 int need_pc
, struct dwarf2_cu
*cu
);
764 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
765 CORE_ADDR
*highpc
, int need_pc
,
766 struct dwarf2_cu
*cu
);
768 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
769 struct dwarf2_cu
*cu
);
771 static void add_partial_subprogram (struct partial_die_info
*pdi
,
772 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
773 int need_pc
, struct dwarf2_cu
*cu
);
775 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
778 struct dwarf2_cu
*cu
);
780 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
782 static void psymtab_to_symtab_1 (struct partial_symtab
*);
784 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
786 static void dwarf2_free_abbrev_table (void *);
788 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
791 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
794 static struct partial_die_info
*load_partial_dies (bfd
*, gdb_byte
*, int,
797 static gdb_byte
*read_partial_die (struct partial_die_info
*,
798 struct abbrev_info
*abbrev
, unsigned int,
799 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
801 static struct partial_die_info
*find_partial_die (unsigned int,
804 static void fixup_partial_die (struct partial_die_info
*,
807 static gdb_byte
*read_full_die (struct die_info
**, bfd
*, gdb_byte
*,
808 struct dwarf2_cu
*, int *);
810 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
811 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
813 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
814 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
816 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
818 static int read_1_signed_byte (bfd
*, gdb_byte
*);
820 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
822 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
824 static unsigned long read_8_bytes (bfd
*, gdb_byte
*);
826 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
829 static LONGEST
read_initial_length (bfd
*, gdb_byte
*, unsigned int *);
831 static LONGEST read_checked_initial_length_and_offset
832 (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
833 unsigned int *, unsigned int *);
835 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
838 static LONGEST
read_offset_1 (bfd
*, gdb_byte
*, unsigned int);
840 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
842 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
844 static char *read_indirect_string (bfd
*, gdb_byte
*,
845 const struct comp_unit_head
*,
848 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
850 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
852 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
854 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
856 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
859 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
860 struct dwarf2_cu
*cu
);
862 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
864 static struct die_info
*die_specification (struct die_info
*die
,
865 struct dwarf2_cu
**);
867 static void free_line_header (struct line_header
*lh
);
869 static void add_file_name (struct line_header
*, char *, unsigned int,
870 unsigned int, unsigned int);
872 static struct line_header
*(dwarf_decode_line_header
873 (unsigned int offset
,
874 bfd
*abfd
, struct dwarf2_cu
*cu
));
876 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
877 struct dwarf2_cu
*, struct partial_symtab
*);
879 static void dwarf2_start_subfile (char *, char *, char *);
881 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
884 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
887 static void dwarf2_const_value_data (struct attribute
*attr
,
891 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
893 static struct type
*die_containing_type (struct die_info
*,
896 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
898 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
900 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
902 static char *typename_concat (struct obstack
*,
907 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
909 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
911 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
913 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
914 struct dwarf2_cu
*, struct partial_symtab
*);
916 static int dwarf2_get_pc_bounds (struct die_info
*,
917 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*);
919 static void get_scope_pc_bounds (struct die_info
*,
920 CORE_ADDR
*, CORE_ADDR
*,
923 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
924 CORE_ADDR
, struct dwarf2_cu
*);
926 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
929 static void dwarf2_attach_fields_to_type (struct field_info
*,
930 struct type
*, struct dwarf2_cu
*);
932 static void dwarf2_add_member_fn (struct field_info
*,
933 struct die_info
*, struct type
*,
936 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
937 struct type
*, struct dwarf2_cu
*);
939 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
941 static const char *determine_class_name (struct die_info
*die
,
942 struct dwarf2_cu
*cu
);
944 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
946 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
948 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
950 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
952 static const char *namespace_name (struct die_info
*die
,
953 int *is_anonymous
, struct dwarf2_cu
*);
955 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
957 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
959 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
962 static struct die_info
*read_comp_unit (gdb_byte
*, bfd
*, struct dwarf2_cu
*);
964 static struct die_info
*read_die_and_children_1 (gdb_byte
*info_ptr
, bfd
*abfd
,
966 gdb_byte
**new_info_ptr
,
967 struct die_info
*parent
);
969 static struct die_info
*read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
971 gdb_byte
**new_info_ptr
,
972 struct die_info
*parent
);
974 static struct die_info
*read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
976 gdb_byte
**new_info_ptr
,
977 struct die_info
*parent
);
979 static void process_die (struct die_info
*, struct dwarf2_cu
*);
981 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
983 static char *dwarf2_canonicalize_name (char *, struct dwarf2_cu
*,
986 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
988 static struct die_info
*dwarf2_extension (struct die_info
*die
,
989 struct dwarf2_cu
**);
991 static char *dwarf_tag_name (unsigned int);
993 static char *dwarf_attr_name (unsigned int);
995 static char *dwarf_form_name (unsigned int);
997 static char *dwarf_stack_op_name (unsigned int);
999 static char *dwarf_bool_name (unsigned int);
1001 static char *dwarf_type_encoding_name (unsigned int);
1004 static char *dwarf_cfi_name (unsigned int);
1007 static struct die_info
*sibling_die (struct die_info
*);
1009 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1011 static void dump_die_for_error (struct die_info
*);
1013 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1016 /*static*/ void dump_die (struct die_info
*, int max_level
);
1018 static void store_in_ref_table (struct die_info
*,
1019 struct dwarf2_cu
*);
1021 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*);
1023 static int dwarf2_get_attr_constant_value (struct attribute
*, int);
1025 static struct die_info
*follow_die_ref (struct die_info
*,
1027 struct dwarf2_cu
**);
1029 /* memory allocation interface */
1031 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1033 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1035 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1037 static void initialize_cu_func_list (struct dwarf2_cu
*);
1039 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1040 struct dwarf2_cu
*);
1042 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1043 char *, bfd
*, struct dwarf2_cu
*);
1045 static int attr_form_is_block (struct attribute
*);
1047 static int attr_form_is_section_offset (struct attribute
*);
1049 static int attr_form_is_constant (struct attribute
*);
1051 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1053 struct dwarf2_cu
*cu
);
1055 static gdb_byte
*skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
1056 struct dwarf2_cu
*cu
);
1058 static void free_stack_comp_unit (void *);
1060 static hashval_t
partial_die_hash (const void *item
);
1062 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1064 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1065 (unsigned int offset
, struct objfile
*objfile
);
1067 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1068 (unsigned int offset
, struct objfile
*objfile
);
1070 static void free_one_comp_unit (void *);
1072 static void free_cached_comp_units (void *);
1074 static void age_cached_comp_units (void);
1076 static void free_one_cached_comp_unit (void *);
1078 static struct type
*set_die_type (struct die_info
*, struct type
*,
1079 struct dwarf2_cu
*);
1081 static void create_all_comp_units (struct objfile
*);
1083 static struct dwarf2_cu
*load_full_comp_unit (struct dwarf2_per_cu_data
*,
1086 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1088 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1089 struct dwarf2_per_cu_data
*);
1091 static void dwarf2_mark (struct dwarf2_cu
*);
1093 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1095 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1097 /* Try to locate the sections we need for DWARF 2 debugging
1098 information and return true if we have enough to do something. */
1101 dwarf2_has_info (struct objfile
*objfile
)
1103 struct dwarf2_per_objfile
*data
;
1105 /* Initialize per-objfile state. */
1106 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1107 memset (data
, 0, sizeof (*data
));
1108 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1109 dwarf2_per_objfile
= data
;
1111 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1112 return (data
->info
.asection
!= NULL
&& data
->abbrev
.asection
!= NULL
);
1115 /* When loading sections, we can either look for ".<name>", or for
1116 * ".z<name>", which indicates a compressed section. */
1119 section_is_p (const char *section_name
, const char *name
)
1121 return (section_name
[0] == '.'
1122 && (strcmp (section_name
+ 1, name
) == 0
1123 || (section_name
[1] == 'z'
1124 && strcmp (section_name
+ 2, name
) == 0)));
1127 /* This function is mapped across the sections and remembers the
1128 offset and size of each of the debugging sections we are interested
1132 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1134 if (section_is_p (sectp
->name
, INFO_SECTION
))
1136 dwarf2_per_objfile
->info
.asection
= sectp
;
1137 dwarf2_per_objfile
->info
.size
= bfd_get_section_size (sectp
);
1139 else if (section_is_p (sectp
->name
, ABBREV_SECTION
))
1141 dwarf2_per_objfile
->abbrev
.asection
= sectp
;
1142 dwarf2_per_objfile
->abbrev
.size
= bfd_get_section_size (sectp
);
1144 else if (section_is_p (sectp
->name
, LINE_SECTION
))
1146 dwarf2_per_objfile
->line
.asection
= sectp
;
1147 dwarf2_per_objfile
->line
.size
= bfd_get_section_size (sectp
);
1149 else if (section_is_p (sectp
->name
, PUBNAMES_SECTION
))
1151 dwarf2_per_objfile
->pubnames
.asection
= sectp
;
1152 dwarf2_per_objfile
->pubnames
.size
= bfd_get_section_size (sectp
);
1154 else if (section_is_p (sectp
->name
, ARANGES_SECTION
))
1156 dwarf2_per_objfile
->aranges
.asection
= sectp
;
1157 dwarf2_per_objfile
->aranges
.size
= bfd_get_section_size (sectp
);
1159 else if (section_is_p (sectp
->name
, LOC_SECTION
))
1161 dwarf2_per_objfile
->loc
.asection
= sectp
;
1162 dwarf2_per_objfile
->loc
.size
= bfd_get_section_size (sectp
);
1164 else if (section_is_p (sectp
->name
, MACINFO_SECTION
))
1166 dwarf2_per_objfile
->macinfo
.asection
= sectp
;
1167 dwarf2_per_objfile
->macinfo
.size
= bfd_get_section_size (sectp
);
1169 else if (section_is_p (sectp
->name
, STR_SECTION
))
1171 dwarf2_per_objfile
->str
.asection
= sectp
;
1172 dwarf2_per_objfile
->str
.size
= bfd_get_section_size (sectp
);
1174 else if (section_is_p (sectp
->name
, FRAME_SECTION
))
1176 dwarf2_per_objfile
->frame
.asection
= sectp
;
1177 dwarf2_per_objfile
->frame
.size
= bfd_get_section_size (sectp
);
1179 else if (section_is_p (sectp
->name
, EH_FRAME_SECTION
))
1181 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1182 if (aflag
& SEC_HAS_CONTENTS
)
1184 dwarf2_per_objfile
->eh_frame
.asection
= sectp
;
1185 dwarf2_per_objfile
->eh_frame
.size
= bfd_get_section_size (sectp
);
1188 else if (section_is_p (sectp
->name
, RANGES_SECTION
))
1190 dwarf2_per_objfile
->ranges
.asection
= sectp
;
1191 dwarf2_per_objfile
->ranges
.size
= bfd_get_section_size (sectp
);
1194 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1195 && bfd_section_vma (abfd
, sectp
) == 0)
1196 dwarf2_per_objfile
->has_section_at_zero
= 1;
1199 /* Decompress a section that was compressed using zlib. Store the
1200 decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
1203 zlib_decompress_section (struct objfile
*objfile
, asection
*sectp
,
1204 gdb_byte
**outbuf
, bfd_size_type
*outsize
)
1206 bfd
*abfd
= objfile
->obfd
;
1208 error (_("Support for zlib-compressed DWARF data (from '%s') "
1209 "is disabled in this copy of GDB"),
1210 bfd_get_filename (abfd
));
1212 bfd_size_type compressed_size
= bfd_get_section_size (sectp
);
1213 gdb_byte
*compressed_buffer
= xmalloc (compressed_size
);
1214 struct cleanup
*cleanup
= make_cleanup (xfree
, compressed_buffer
);
1215 bfd_size_type uncompressed_size
;
1216 gdb_byte
*uncompressed_buffer
;
1219 int header_size
= 12;
1221 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1222 || bfd_bread (compressed_buffer
, compressed_size
, abfd
) != compressed_size
)
1223 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1224 bfd_get_filename (abfd
));
1226 /* Read the zlib header. In this case, it should be "ZLIB" followed
1227 by the uncompressed section size, 8 bytes in big-endian order. */
1228 if (compressed_size
< header_size
1229 || strncmp (compressed_buffer
, "ZLIB", 4) != 0)
1230 error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
1231 bfd_get_filename (abfd
));
1232 uncompressed_size
= compressed_buffer
[4]; uncompressed_size
<<= 8;
1233 uncompressed_size
+= compressed_buffer
[5]; uncompressed_size
<<= 8;
1234 uncompressed_size
+= compressed_buffer
[6]; uncompressed_size
<<= 8;
1235 uncompressed_size
+= compressed_buffer
[7]; uncompressed_size
<<= 8;
1236 uncompressed_size
+= compressed_buffer
[8]; uncompressed_size
<<= 8;
1237 uncompressed_size
+= compressed_buffer
[9]; uncompressed_size
<<= 8;
1238 uncompressed_size
+= compressed_buffer
[10]; uncompressed_size
<<= 8;
1239 uncompressed_size
+= compressed_buffer
[11];
1241 /* It is possible the section consists of several compressed
1242 buffers concatenated together, so we uncompress in a loop. */
1246 strm
.avail_in
= compressed_size
- header_size
;
1247 strm
.next_in
= (Bytef
*) compressed_buffer
+ header_size
;
1248 strm
.avail_out
= uncompressed_size
;
1249 uncompressed_buffer
= obstack_alloc (&objfile
->objfile_obstack
,
1251 rc
= inflateInit (&strm
);
1252 while (strm
.avail_in
> 0)
1255 error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
1256 bfd_get_filename (abfd
), rc
);
1257 strm
.next_out
= ((Bytef
*) uncompressed_buffer
1258 + (uncompressed_size
- strm
.avail_out
));
1259 rc
= inflate (&strm
, Z_FINISH
);
1260 if (rc
!= Z_STREAM_END
)
1261 error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
1262 bfd_get_filename (abfd
), rc
);
1263 rc
= inflateReset (&strm
);
1265 rc
= inflateEnd (&strm
);
1267 || strm
.avail_out
!= 0)
1268 error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
1269 bfd_get_filename (abfd
), rc
);
1271 do_cleanups (cleanup
);
1272 *outbuf
= uncompressed_buffer
;
1273 *outsize
= uncompressed_size
;
1277 /* Read the contents of the section SECTP from object file specified by
1278 OBJFILE, store info about the section into INFO.
1279 If the section is compressed, uncompress it before returning. */
1282 dwarf2_read_section (struct objfile
*objfile
, struct dwarf2_section_info
*info
)
1284 bfd
*abfd
= objfile
->obfd
;
1285 asection
*sectp
= info
->asection
;
1286 gdb_byte
*buf
, *retbuf
;
1287 unsigned char header
[4];
1289 info
->buffer
= NULL
;
1290 info
->was_mmapped
= 0;
1292 if (info
->asection
== NULL
|| info
->size
== 0)
1295 /* Check if the file has a 4-byte header indicating compression. */
1296 if (info
->size
> sizeof (header
)
1297 && bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) == 0
1298 && bfd_bread (header
, sizeof (header
), abfd
) == sizeof (header
))
1300 /* Upon decompression, update the buffer and its size. */
1301 if (strncmp (header
, "ZLIB", sizeof (header
)) == 0)
1303 zlib_decompress_section (objfile
, sectp
, &info
->buffer
,
1311 pagesize
= getpagesize ();
1313 /* Only try to mmap sections which are large enough: we don't want to
1314 waste space due to fragmentation. Also, only try mmap for sections
1315 without relocations. */
1317 if (info
->size
> 4 * pagesize
&& (sectp
->flags
& SEC_RELOC
) == 0)
1319 off_t pg_offset
= sectp
->filepos
& ~(pagesize
- 1);
1320 size_t map_length
= info
->size
+ sectp
->filepos
- pg_offset
;
1321 caddr_t retbuf
= bfd_mmap (abfd
, 0, map_length
, PROT_READ
,
1322 MAP_PRIVATE
, pg_offset
);
1324 if (retbuf
!= MAP_FAILED
)
1326 info
->was_mmapped
= 1;
1327 info
->buffer
= retbuf
+ (sectp
->filepos
& (pagesize
- 1)) ;
1333 /* If we get here, we are a normal, not-compressed section. */
1335 = obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
1337 /* When debugging .o files, we may need to apply relocations; see
1338 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
1339 We never compress sections in .o files, so we only need to
1340 try this when the section is not compressed. */
1341 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
1344 info
->buffer
= retbuf
;
1348 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
1349 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
1350 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
1351 bfd_get_filename (abfd
));
1354 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
1358 dwarf2_get_section_info (struct objfile
*objfile
, const char *section_name
,
1359 asection
**sectp
, gdb_byte
**bufp
,
1360 bfd_size_type
*sizep
)
1362 struct dwarf2_per_objfile
*data
1363 = objfile_data (objfile
, dwarf2_objfile_data_key
);
1364 struct dwarf2_section_info
*info
;
1365 if (section_is_p (section_name
, EH_FRAME_SECTION
))
1366 info
= &data
->eh_frame
;
1367 else if (section_is_p (section_name
, FRAME_SECTION
))
1368 info
= &data
->frame
;
1372 if (info
->asection
!= NULL
&& info
->size
!= 0 && info
->buffer
== NULL
)
1373 /* We haven't read this section in yet. Do it now. */
1374 dwarf2_read_section (objfile
, info
);
1376 *sectp
= info
->asection
;
1377 *bufp
= info
->buffer
;
1378 *sizep
= info
->size
;
1381 /* Build a partial symbol table. */
1384 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1386 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
1387 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->abbrev
);
1388 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->line
);
1389 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->str
);
1390 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->macinfo
);
1391 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
1392 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->loc
);
1393 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->eh_frame
);
1394 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->frame
);
1397 || (objfile
->global_psymbols
.size
== 0
1398 && objfile
->static_psymbols
.size
== 0))
1400 init_psymbol_list (objfile
, 1024);
1404 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1406 /* Things are significantly easier if we have .debug_aranges and
1407 .debug_pubnames sections */
1409 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1413 /* only test this case for now */
1415 /* In this case we have to work a bit harder */
1416 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1421 /* Build the partial symbol table from the information in the
1422 .debug_pubnames and .debug_aranges sections. */
1425 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1427 bfd
*abfd
= objfile
->obfd
;
1428 char *aranges_buffer
, *pubnames_buffer
;
1429 char *aranges_ptr
, *pubnames_ptr
;
1430 unsigned int entry_length
, version
, info_offset
, info_size
;
1432 pubnames_buffer
= dwarf2_read_section (objfile
,
1433 dwarf_pubnames_section
);
1434 pubnames_ptr
= pubnames_buffer
;
1435 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames
.size
)
1437 unsigned int bytes_read
;
1439 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &bytes_read
);
1440 pubnames_ptr
+= bytes_read
;
1441 version
= read_1_byte (abfd
, pubnames_ptr
);
1443 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1445 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1449 aranges_buffer
= dwarf2_read_section (objfile
,
1450 dwarf_aranges_section
);
1455 /* Return TRUE if OFFSET is within CU_HEADER. */
1458 offset_in_cu_p (const struct comp_unit_head
*cu_header
, unsigned int offset
)
1460 unsigned int bottom
= cu_header
->offset
;
1461 unsigned int top
= (cu_header
->offset
1463 + cu_header
->initial_length_size
);
1464 return (offset
>= bottom
&& offset
< top
);
1467 /* Read in the comp unit header information from the debug_info at
1471 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1472 gdb_byte
*info_ptr
, bfd
*abfd
)
1475 unsigned int bytes_read
;
1477 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
1478 cu_header
->initial_length_size
= bytes_read
;
1479 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
1480 info_ptr
+= bytes_read
;
1481 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1483 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1485 info_ptr
+= bytes_read
;
1486 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1488 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1489 if (signed_addr
< 0)
1490 internal_error (__FILE__
, __LINE__
,
1491 _("read_comp_unit_head: dwarf from non elf file"));
1492 cu_header
->signed_addr_p
= signed_addr
;
1498 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1501 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1503 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1505 if (header
->version
!= 2 && header
->version
!= 3)
1506 error (_("Dwarf Error: wrong version in compilation unit header "
1507 "(is %d, should be %d) [in module %s]"), header
->version
,
1508 2, bfd_get_filename (abfd
));
1510 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev
.size
)
1511 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1512 "(offset 0x%lx + 6) [in module %s]"),
1513 (long) header
->abbrev_offset
,
1514 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info
.buffer
),
1515 bfd_get_filename (abfd
));
1517 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1518 > dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
1519 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1520 "(offset 0x%lx + 0) [in module %s]"),
1521 (long) header
->length
,
1522 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info
.buffer
),
1523 bfd_get_filename (abfd
));
1528 /* Allocate a new partial symtab for file named NAME and mark this new
1529 partial symtab as being an include of PST. */
1532 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1533 struct objfile
*objfile
)
1535 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1537 subpst
->section_offsets
= pst
->section_offsets
;
1538 subpst
->textlow
= 0;
1539 subpst
->texthigh
= 0;
1541 subpst
->dependencies
= (struct partial_symtab
**)
1542 obstack_alloc (&objfile
->objfile_obstack
,
1543 sizeof (struct partial_symtab
*));
1544 subpst
->dependencies
[0] = pst
;
1545 subpst
->number_of_dependencies
= 1;
1547 subpst
->globals_offset
= 0;
1548 subpst
->n_global_syms
= 0;
1549 subpst
->statics_offset
= 0;
1550 subpst
->n_static_syms
= 0;
1551 subpst
->symtab
= NULL
;
1552 subpst
->read_symtab
= pst
->read_symtab
;
1555 /* No private part is necessary for include psymtabs. This property
1556 can be used to differentiate between such include psymtabs and
1557 the regular ones. */
1558 subpst
->read_symtab_private
= NULL
;
1561 /* Read the Line Number Program data and extract the list of files
1562 included by the source file represented by PST. Build an include
1563 partial symtab for each of these included files.
1565 This procedure assumes that there *is* a Line Number Program in
1566 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1567 before calling this procedure. */
1570 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1571 struct partial_die_info
*pdi
,
1572 struct partial_symtab
*pst
)
1574 struct objfile
*objfile
= cu
->objfile
;
1575 bfd
*abfd
= objfile
->obfd
;
1576 struct line_header
*lh
;
1578 lh
= dwarf_decode_line_header (pdi
->line_offset
, abfd
, cu
);
1580 return; /* No linetable, so no includes. */
1582 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1584 free_line_header (lh
);
1588 /* Build the partial symbol table by doing a quick pass through the
1589 .debug_info and .debug_abbrev sections. */
1592 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
1594 /* Instead of reading this into a big buffer, we should probably use
1595 mmap() on architectures that support it. (FIXME) */
1596 bfd
*abfd
= objfile
->obfd
;
1598 gdb_byte
*beg_of_comp_unit
;
1599 struct partial_die_info comp_unit_die
;
1600 struct partial_symtab
*pst
;
1601 struct cleanup
*back_to
;
1604 info_ptr
= dwarf2_per_objfile
->info
.buffer
;
1606 /* Any cached compilation units will be linked by the per-objfile
1607 read_in_chain. Make sure to free them when we're done. */
1608 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1610 create_all_comp_units (objfile
);
1612 objfile
->psymtabs_addrmap
= addrmap_create_mutable
1613 (&objfile
->objfile_obstack
);
1615 /* Since the objects we're extracting from .debug_info vary in
1616 length, only the individual functions to extract them (like
1617 read_comp_unit_head and load_partial_die) can really know whether
1618 the buffer is large enough to hold another complete object.
1620 At the moment, they don't actually check that. If .debug_info
1621 holds just one extra byte after the last compilation unit's dies,
1622 then read_comp_unit_head will happily read off the end of the
1623 buffer. read_partial_die is similarly casual. Those functions
1626 For this loop condition, simply checking whether there's any data
1627 left at all should be sufficient. */
1628 while (info_ptr
< (dwarf2_per_objfile
->info
.buffer
1629 + dwarf2_per_objfile
->info
.size
))
1631 struct cleanup
*back_to_inner
;
1632 struct dwarf2_cu cu
;
1633 struct abbrev_info
*abbrev
;
1634 unsigned int bytes_read
;
1635 struct dwarf2_per_cu_data
*this_cu
;
1637 beg_of_comp_unit
= info_ptr
;
1639 memset (&cu
, 0, sizeof (cu
));
1641 obstack_init (&cu
.comp_unit_obstack
);
1643 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1645 cu
.objfile
= objfile
;
1646 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
, abfd
);
1648 /* Complete the cu_header */
1649 cu
.header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info
.buffer
;
1650 cu
.header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1652 cu
.list_in_scope
= &file_symbols
;
1654 /* Read the abbrevs for this compilation unit into a table */
1655 dwarf2_read_abbrevs (abfd
, &cu
);
1656 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1658 this_cu
= dwarf2_find_comp_unit (cu
.header
.offset
, objfile
);
1660 /* Read the compilation unit die */
1661 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, &cu
);
1662 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1663 abfd
, info_ptr
, &cu
);
1665 if (comp_unit_die
.tag
== DW_TAG_partial_unit
)
1667 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1668 + cu
.header
.initial_length_size
);
1669 do_cleanups (back_to_inner
);
1673 /* Set the language we're debugging */
1674 set_cu_language (comp_unit_die
.language
, &cu
);
1676 /* Allocate a new partial symbol table structure */
1677 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1678 comp_unit_die
.name
? comp_unit_die
.name
: "",
1679 /* TEXTLOW and TEXTHIGH are set below. */
1681 objfile
->global_psymbols
.next
,
1682 objfile
->static_psymbols
.next
);
1684 if (comp_unit_die
.dirname
)
1685 pst
->dirname
= obsavestring (comp_unit_die
.dirname
,
1686 strlen (comp_unit_die
.dirname
),
1687 &objfile
->objfile_obstack
);
1689 pst
->read_symtab_private
= (char *) this_cu
;
1691 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1693 /* Store the function that reads in the rest of the symbol table */
1694 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1696 /* If this compilation unit was already read in, free the
1697 cached copy in order to read it in again. This is
1698 necessary because we skipped some symbols when we first
1699 read in the compilation unit (see load_partial_dies).
1700 This problem could be avoided, but the benefit is
1702 if (this_cu
->cu
!= NULL
)
1703 free_one_cached_comp_unit (this_cu
->cu
);
1705 cu
.per_cu
= this_cu
;
1707 /* Note that this is a pointer to our stack frame, being
1708 added to a global data structure. It will be cleaned up
1709 in free_stack_comp_unit when we finish with this
1710 compilation unit. */
1713 this_cu
->psymtab
= pst
;
1715 /* Possibly set the default values of LOWPC and HIGHPC from
1717 if (cu
.has_ranges_offset
)
1719 if (dwarf2_ranges_read (cu
.ranges_offset
, &comp_unit_die
.lowpc
,
1720 &comp_unit_die
.highpc
, &cu
, pst
))
1721 comp_unit_die
.has_pc_info
= 1;
1723 else if (comp_unit_die
.has_pc_info
1724 && comp_unit_die
.lowpc
< comp_unit_die
.highpc
)
1725 /* Store the contiguous range if it is not empty; it can be empty for
1726 CUs with no code. */
1727 addrmap_set_empty (objfile
->psymtabs_addrmap
,
1728 comp_unit_die
.lowpc
+ baseaddr
,
1729 comp_unit_die
.highpc
+ baseaddr
- 1, pst
);
1731 /* Check if comp unit has_children.
1732 If so, read the rest of the partial symbols from this comp unit.
1733 If not, there's no more debug_info for this comp unit. */
1734 if (comp_unit_die
.has_children
)
1736 struct partial_die_info
*first_die
;
1737 CORE_ADDR lowpc
, highpc
;
1739 lowpc
= ((CORE_ADDR
) -1);
1740 highpc
= ((CORE_ADDR
) 0);
1742 first_die
= load_partial_dies (abfd
, info_ptr
, 1, &cu
);
1744 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
1745 ! comp_unit_die
.has_pc_info
, &cu
);
1747 /* If we didn't find a lowpc, set it to highpc to avoid
1748 complaints from `maint check'. */
1749 if (lowpc
== ((CORE_ADDR
) -1))
1752 /* If the compilation unit didn't have an explicit address range,
1753 then use the information extracted from its child dies. */
1754 if (! comp_unit_die
.has_pc_info
)
1756 comp_unit_die
.lowpc
= lowpc
;
1757 comp_unit_die
.highpc
= highpc
;
1760 pst
->textlow
= comp_unit_die
.lowpc
+ baseaddr
;
1761 pst
->texthigh
= comp_unit_die
.highpc
+ baseaddr
;
1763 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1764 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1765 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1766 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1767 sort_pst_symbols (pst
);
1769 /* If there is already a psymtab or symtab for a file of this
1770 name, remove it. (If there is a symtab, more drastic things
1771 also happen.) This happens in VxWorks. */
1772 free_named_symtabs (pst
->filename
);
1774 info_ptr
= beg_of_comp_unit
+ cu
.header
.length
1775 + cu
.header
.initial_length_size
;
1777 if (comp_unit_die
.has_stmt_list
)
1779 /* Get the list of files included in the current compilation unit,
1780 and build a psymtab for each of them. */
1781 dwarf2_build_include_psymtabs (&cu
, &comp_unit_die
, pst
);
1784 do_cleanups (back_to_inner
);
1787 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
1788 &objfile
->objfile_obstack
);
1790 do_cleanups (back_to
);
1793 /* Load the DIEs for a secondary CU into memory. */
1796 load_comp_unit (struct dwarf2_per_cu_data
*this_cu
, struct objfile
*objfile
)
1798 bfd
*abfd
= objfile
->obfd
;
1799 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
1800 struct partial_die_info comp_unit_die
;
1801 struct dwarf2_cu
*cu
;
1802 struct abbrev_info
*abbrev
;
1803 unsigned int bytes_read
;
1804 struct cleanup
*back_to
;
1806 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ this_cu
->offset
;
1807 beg_of_comp_unit
= info_ptr
;
1809 cu
= xmalloc (sizeof (struct dwarf2_cu
));
1810 memset (cu
, 0, sizeof (struct dwarf2_cu
));
1812 obstack_init (&cu
->comp_unit_obstack
);
1814 cu
->objfile
= objfile
;
1815 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
1817 /* Complete the cu_header. */
1818 cu
->header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info
.buffer
;
1819 cu
->header
.first_die_offset
= info_ptr
- beg_of_comp_unit
;
1821 /* Read the abbrevs for this compilation unit into a table. */
1822 dwarf2_read_abbrevs (abfd
, cu
);
1823 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
1825 /* Read the compilation unit die. */
1826 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
1827 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1828 abfd
, info_ptr
, cu
);
1830 /* Set the language we're debugging. */
1831 set_cu_language (comp_unit_die
.language
, cu
);
1833 /* Link this compilation unit into the compilation unit tree. */
1835 cu
->per_cu
= this_cu
;
1836 cu
->type_hash
= cu
->per_cu
->type_hash
;
1838 /* Check if comp unit has_children.
1839 If so, read the rest of the partial symbols from this comp unit.
1840 If not, there's no more debug_info for this comp unit. */
1841 if (comp_unit_die
.has_children
)
1842 load_partial_dies (abfd
, info_ptr
, 0, cu
);
1844 do_cleanups (back_to
);
1847 /* Create a list of all compilation units in OBJFILE. We do this only
1848 if an inter-comp-unit reference is found; presumably if there is one,
1849 there will be many, and one will occur early in the .debug_info section.
1850 So there's no point in building this list incrementally. */
1853 create_all_comp_units (struct objfile
*objfile
)
1857 struct dwarf2_per_cu_data
**all_comp_units
;
1858 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info
.buffer
;
1862 all_comp_units
= xmalloc (n_allocated
1863 * sizeof (struct dwarf2_per_cu_data
*));
1865 while (info_ptr
< dwarf2_per_objfile
->info
.buffer
+ dwarf2_per_objfile
->info
.size
)
1867 unsigned int length
, initial_length_size
;
1868 gdb_byte
*beg_of_comp_unit
;
1869 struct dwarf2_per_cu_data
*this_cu
;
1870 unsigned int offset
;
1872 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
1874 /* Read just enough information to find out where the next
1875 compilation unit is. */
1876 length
= read_initial_length (objfile
->obfd
, info_ptr
,
1877 &initial_length_size
);
1879 /* Save the compilation unit for later lookup. */
1880 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
1881 sizeof (struct dwarf2_per_cu_data
));
1882 memset (this_cu
, 0, sizeof (*this_cu
));
1883 this_cu
->offset
= offset
;
1884 this_cu
->length
= length
+ initial_length_size
;
1886 if (n_comp_units
== n_allocated
)
1889 all_comp_units
= xrealloc (all_comp_units
,
1891 * sizeof (struct dwarf2_per_cu_data
*));
1893 all_comp_units
[n_comp_units
++] = this_cu
;
1895 info_ptr
= info_ptr
+ this_cu
->length
;
1898 dwarf2_per_objfile
->all_comp_units
1899 = obstack_alloc (&objfile
->objfile_obstack
,
1900 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1901 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
1902 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1903 xfree (all_comp_units
);
1904 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
1907 /* Process all loaded DIEs for compilation unit CU, starting at
1908 FIRST_DIE. The caller should pass NEED_PC == 1 if the compilation
1909 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
1910 DW_AT_ranges). If NEED_PC is set, then this function will set
1911 *LOWPC and *HIGHPC to the lowest and highest PC values found in CU
1912 and record the covered ranges in the addrmap. */
1915 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
1916 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
1918 struct objfile
*objfile
= cu
->objfile
;
1919 bfd
*abfd
= objfile
->obfd
;
1920 struct partial_die_info
*pdi
;
1922 /* Now, march along the PDI's, descending into ones which have
1923 interesting children but skipping the children of the other ones,
1924 until we reach the end of the compilation unit. */
1930 fixup_partial_die (pdi
, cu
);
1932 /* Anonymous namespaces have no name but have interesting
1933 children, so we need to look at them. Ditto for anonymous
1936 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
1937 || pdi
->tag
== DW_TAG_enumeration_type
)
1941 case DW_TAG_subprogram
:
1942 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
1944 case DW_TAG_variable
:
1945 case DW_TAG_typedef
:
1946 case DW_TAG_union_type
:
1947 if (!pdi
->is_declaration
)
1949 add_partial_symbol (pdi
, cu
);
1952 case DW_TAG_class_type
:
1953 case DW_TAG_interface_type
:
1954 case DW_TAG_structure_type
:
1955 if (!pdi
->is_declaration
)
1957 add_partial_symbol (pdi
, cu
);
1960 case DW_TAG_enumeration_type
:
1961 if (!pdi
->is_declaration
)
1962 add_partial_enumeration (pdi
, cu
);
1964 case DW_TAG_base_type
:
1965 case DW_TAG_subrange_type
:
1966 /* File scope base type definitions are added to the partial
1968 add_partial_symbol (pdi
, cu
);
1970 case DW_TAG_namespace
:
1971 add_partial_namespace (pdi
, lowpc
, highpc
, need_pc
, cu
);
1974 add_partial_module (pdi
, lowpc
, highpc
, need_pc
, cu
);
1981 /* If the die has a sibling, skip to the sibling. */
1983 pdi
= pdi
->die_sibling
;
1987 /* Functions used to compute the fully scoped name of a partial DIE.
1989 Normally, this is simple. For C++, the parent DIE's fully scoped
1990 name is concatenated with "::" and the partial DIE's name. For
1991 Java, the same thing occurs except that "." is used instead of "::".
1992 Enumerators are an exception; they use the scope of their parent
1993 enumeration type, i.e. the name of the enumeration type is not
1994 prepended to the enumerator.
1996 There are two complexities. One is DW_AT_specification; in this
1997 case "parent" means the parent of the target of the specification,
1998 instead of the direct parent of the DIE. The other is compilers
1999 which do not emit DW_TAG_namespace; in this case we try to guess
2000 the fully qualified name of structure types from their members'
2001 linkage names. This must be done using the DIE's children rather
2002 than the children of any DW_AT_specification target. We only need
2003 to do this for structures at the top level, i.e. if the target of
2004 any DW_AT_specification (if any; otherwise the DIE itself) does not
2007 /* Compute the scope prefix associated with PDI's parent, in
2008 compilation unit CU. The result will be allocated on CU's
2009 comp_unit_obstack, or a copy of the already allocated PDI->NAME
2010 field. NULL is returned if no prefix is necessary. */
2012 partial_die_parent_scope (struct partial_die_info
*pdi
,
2013 struct dwarf2_cu
*cu
)
2015 char *grandparent_scope
;
2016 struct partial_die_info
*parent
, *real_pdi
;
2018 /* We need to look at our parent DIE; if we have a DW_AT_specification,
2019 then this means the parent of the specification DIE. */
2022 while (real_pdi
->has_specification
)
2023 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2025 parent
= real_pdi
->die_parent
;
2029 if (parent
->scope_set
)
2030 return parent
->scope
;
2032 fixup_partial_die (parent
, cu
);
2034 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
2036 if (parent
->tag
== DW_TAG_namespace
2037 || parent
->tag
== DW_TAG_structure_type
2038 || parent
->tag
== DW_TAG_class_type
2039 || parent
->tag
== DW_TAG_interface_type
2040 || parent
->tag
== DW_TAG_union_type
)
2042 if (grandparent_scope
== NULL
)
2043 parent
->scope
= parent
->name
;
2045 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
2048 else if (parent
->tag
== DW_TAG_enumeration_type
)
2049 /* Enumerators should not get the name of the enumeration as a prefix. */
2050 parent
->scope
= grandparent_scope
;
2053 /* FIXME drow/2004-04-01: What should we be doing with
2054 function-local names? For partial symbols, we should probably be
2056 complaint (&symfile_complaints
,
2057 _("unhandled containing DIE tag %d for DIE at %d"),
2058 parent
->tag
, pdi
->offset
);
2059 parent
->scope
= grandparent_scope
;
2062 parent
->scope_set
= 1;
2063 return parent
->scope
;
2066 /* Return the fully scoped name associated with PDI, from compilation unit
2067 CU. The result will be allocated with malloc. */
2069 partial_die_full_name (struct partial_die_info
*pdi
,
2070 struct dwarf2_cu
*cu
)
2074 parent_scope
= partial_die_parent_scope (pdi
, cu
);
2075 if (parent_scope
== NULL
)
2078 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
2082 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
2084 struct objfile
*objfile
= cu
->objfile
;
2086 char *actual_name
= NULL
;
2087 const char *my_prefix
;
2088 const struct partial_symbol
*psym
= NULL
;
2090 int built_actual_name
= 0;
2092 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2094 if (pdi_needs_namespace (pdi
->tag
))
2096 actual_name
= partial_die_full_name (pdi
, cu
);
2098 built_actual_name
= 1;
2101 if (actual_name
== NULL
)
2102 actual_name
= pdi
->name
;
2106 case DW_TAG_subprogram
:
2107 if (pdi
->is_external
|| cu
->language
== language_ada
)
2109 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
2110 of the global scope. But in Ada, we want to be able to access
2111 nested procedures globally. So all Ada subprograms are stored
2112 in the global scope. */
2113 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2114 mst_text, objfile); */
2115 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2116 VAR_DOMAIN
, LOC_BLOCK
,
2117 &objfile
->global_psymbols
,
2118 0, pdi
->lowpc
+ baseaddr
,
2119 cu
->language
, objfile
);
2123 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
2124 mst_file_text, objfile); */
2125 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2126 VAR_DOMAIN
, LOC_BLOCK
,
2127 &objfile
->static_psymbols
,
2128 0, pdi
->lowpc
+ baseaddr
,
2129 cu
->language
, objfile
);
2132 case DW_TAG_variable
:
2133 if (pdi
->is_external
)
2136 Don't enter into the minimal symbol tables as there is
2137 a minimal symbol table entry from the ELF symbols already.
2138 Enter into partial symbol table if it has a location
2139 descriptor or a type.
2140 If the location descriptor is missing, new_symbol will create
2141 a LOC_UNRESOLVED symbol, the address of the variable will then
2142 be determined from the minimal symbol table whenever the variable
2144 The address for the partial symbol table entry is not
2145 used by GDB, but it comes in handy for debugging partial symbol
2149 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2150 if (pdi
->locdesc
|| pdi
->has_type
)
2151 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2152 VAR_DOMAIN
, LOC_STATIC
,
2153 &objfile
->global_psymbols
,
2155 cu
->language
, objfile
);
2159 /* Static Variable. Skip symbols without location descriptors. */
2160 if (pdi
->locdesc
== NULL
)
2162 if (built_actual_name
)
2163 xfree (actual_name
);
2166 addr
= decode_locdesc (pdi
->locdesc
, cu
);
2167 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
2168 mst_file_data, objfile); */
2169 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
2170 VAR_DOMAIN
, LOC_STATIC
,
2171 &objfile
->static_psymbols
,
2173 cu
->language
, objfile
);
2176 case DW_TAG_typedef
:
2177 case DW_TAG_base_type
:
2178 case DW_TAG_subrange_type
:
2179 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2180 VAR_DOMAIN
, LOC_TYPEDEF
,
2181 &objfile
->static_psymbols
,
2182 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2184 case DW_TAG_namespace
:
2185 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2186 VAR_DOMAIN
, LOC_TYPEDEF
,
2187 &objfile
->global_psymbols
,
2188 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2190 case DW_TAG_class_type
:
2191 case DW_TAG_interface_type
:
2192 case DW_TAG_structure_type
:
2193 case DW_TAG_union_type
:
2194 case DW_TAG_enumeration_type
:
2195 /* Skip external references. The DWARF standard says in the section
2196 about "Structure, Union, and Class Type Entries": "An incomplete
2197 structure, union or class type is represented by a structure,
2198 union or class entry that does not have a byte size attribute
2199 and that has a DW_AT_declaration attribute." */
2200 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
2202 if (built_actual_name
)
2203 xfree (actual_name
);
2207 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2208 static vs. global. */
2209 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2210 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2211 (cu
->language
== language_cplus
2212 || cu
->language
== language_java
)
2213 ? &objfile
->global_psymbols
2214 : &objfile
->static_psymbols
,
2215 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2218 case DW_TAG_enumerator
:
2219 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2220 VAR_DOMAIN
, LOC_CONST
,
2221 (cu
->language
== language_cplus
2222 || cu
->language
== language_java
)
2223 ? &objfile
->global_psymbols
2224 : &objfile
->static_psymbols
,
2225 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2231 /* Check to see if we should scan the name for possible namespace
2232 info. Only do this if this is C++, if we don't have namespace
2233 debugging info in the file, if the psym is of an appropriate type
2234 (otherwise we'll have psym == NULL), and if we actually had a
2235 mangled name to begin with. */
2237 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2238 cases which do not set PSYM above? */
2240 if (cu
->language
== language_cplus
2241 && cu
->has_namespace_info
== 0
2243 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2244 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2247 if (built_actual_name
)
2248 xfree (actual_name
);
2251 /* Determine whether a die of type TAG living in a C++ class or
2252 namespace needs to have the name of the scope prepended to the
2253 name listed in the die. */
2256 pdi_needs_namespace (enum dwarf_tag tag
)
2260 case DW_TAG_namespace
:
2261 case DW_TAG_typedef
:
2262 case DW_TAG_class_type
:
2263 case DW_TAG_interface_type
:
2264 case DW_TAG_structure_type
:
2265 case DW_TAG_union_type
:
2266 case DW_TAG_enumeration_type
:
2267 case DW_TAG_enumerator
:
2274 /* Read a partial die corresponding to a namespace; also, add a symbol
2275 corresponding to that namespace to the symbol table. NAMESPACE is
2276 the name of the enclosing namespace. */
2279 add_partial_namespace (struct partial_die_info
*pdi
,
2280 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2281 int need_pc
, struct dwarf2_cu
*cu
)
2283 struct objfile
*objfile
= cu
->objfile
;
2285 /* Add a symbol for the namespace. */
2287 add_partial_symbol (pdi
, cu
);
2289 /* Now scan partial symbols in that namespace. */
2291 if (pdi
->has_children
)
2292 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2295 /* Read a partial die corresponding to a Fortran module. */
2298 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
2299 CORE_ADDR
*highpc
, int need_pc
, struct dwarf2_cu
*cu
)
2301 /* Now scan partial symbols in that module.
2303 FIXME: Support the separate Fortran module namespaces. */
2305 if (pdi
->has_children
)
2306 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, need_pc
, cu
);
2309 /* Read a partial die corresponding to a subprogram and create a partial
2310 symbol for that subprogram. When the CU language allows it, this
2311 routine also defines a partial symbol for each nested subprogram
2312 that this subprogram contains.
2314 DIE my also be a lexical block, in which case we simply search
2315 recursively for suprograms defined inside that lexical block.
2316 Again, this is only performed when the CU language allows this
2317 type of definitions. */
2320 add_partial_subprogram (struct partial_die_info
*pdi
,
2321 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2322 int need_pc
, struct dwarf2_cu
*cu
)
2324 if (pdi
->tag
== DW_TAG_subprogram
)
2326 if (pdi
->has_pc_info
)
2328 if (pdi
->lowpc
< *lowpc
)
2329 *lowpc
= pdi
->lowpc
;
2330 if (pdi
->highpc
> *highpc
)
2331 *highpc
= pdi
->highpc
;
2335 struct objfile
*objfile
= cu
->objfile
;
2337 baseaddr
= ANOFFSET (objfile
->section_offsets
,
2338 SECT_OFF_TEXT (objfile
));
2339 addrmap_set_empty (objfile
->psymtabs_addrmap
,
2340 pdi
->lowpc
, pdi
->highpc
- 1,
2341 cu
->per_cu
->psymtab
);
2343 if (!pdi
->is_declaration
)
2344 add_partial_symbol (pdi
, cu
);
2348 if (! pdi
->has_children
)
2351 if (cu
->language
== language_ada
)
2353 pdi
= pdi
->die_child
;
2356 fixup_partial_die (pdi
, cu
);
2357 if (pdi
->tag
== DW_TAG_subprogram
2358 || pdi
->tag
== DW_TAG_lexical_block
)
2359 add_partial_subprogram (pdi
, lowpc
, highpc
, need_pc
, cu
);
2360 pdi
= pdi
->die_sibling
;
2365 /* See if we can figure out if the class lives in a namespace. We do
2366 this by looking for a member function; its demangled name will
2367 contain namespace info, if there is any. */
2370 guess_structure_name (struct partial_die_info
*struct_pdi
,
2371 struct dwarf2_cu
*cu
)
2373 if ((cu
->language
== language_cplus
2374 || cu
->language
== language_java
)
2375 && cu
->has_namespace_info
== 0
2376 && struct_pdi
->has_children
)
2378 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2379 what template types look like, because the demangler
2380 frequently doesn't give the same name as the debug info. We
2381 could fix this by only using the demangled name to get the
2382 prefix (but see comment in read_structure_type). */
2384 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2385 struct partial_die_info
*real_pdi
;
2387 /* If this DIE (this DIE's specification, if any) has a parent, then
2388 we should not do this. We'll prepend the parent's fully qualified
2389 name when we create the partial symbol. */
2391 real_pdi
= struct_pdi
;
2392 while (real_pdi
->has_specification
)
2393 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2395 if (real_pdi
->die_parent
!= NULL
)
2398 while (child_pdi
!= NULL
)
2400 if (child_pdi
->tag
== DW_TAG_subprogram
)
2402 char *actual_class_name
2403 = language_class_name_from_physname (cu
->language_defn
,
2405 if (actual_class_name
!= NULL
)
2408 = obsavestring (actual_class_name
,
2409 strlen (actual_class_name
),
2410 &cu
->comp_unit_obstack
);
2411 xfree (actual_class_name
);
2416 child_pdi
= child_pdi
->die_sibling
;
2421 /* Read a partial die corresponding to an enumeration type. */
2424 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2425 struct dwarf2_cu
*cu
)
2427 struct objfile
*objfile
= cu
->objfile
;
2428 bfd
*abfd
= objfile
->obfd
;
2429 struct partial_die_info
*pdi
;
2431 if (enum_pdi
->name
!= NULL
)
2432 add_partial_symbol (enum_pdi
, cu
);
2434 pdi
= enum_pdi
->die_child
;
2437 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2438 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2440 add_partial_symbol (pdi
, cu
);
2441 pdi
= pdi
->die_sibling
;
2445 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2446 Return the corresponding abbrev, or NULL if the number is zero (indicating
2447 an empty DIE). In either case *BYTES_READ will be set to the length of
2448 the initial number. */
2450 static struct abbrev_info
*
2451 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2452 struct dwarf2_cu
*cu
)
2454 bfd
*abfd
= cu
->objfile
->obfd
;
2455 unsigned int abbrev_number
;
2456 struct abbrev_info
*abbrev
;
2458 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2460 if (abbrev_number
== 0)
2463 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2466 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2467 bfd_get_filename (abfd
));
2473 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2474 pointer to the end of a series of DIEs, terminated by an empty
2475 DIE. Any children of the skipped DIEs will also be skipped. */
2478 skip_children (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2480 struct abbrev_info
*abbrev
;
2481 unsigned int bytes_read
;
2485 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2487 return info_ptr
+ bytes_read
;
2489 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
2493 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2494 should point just after the initial uleb128 of a DIE, and the
2495 abbrev corresponding to that skipped uleb128 should be passed in
2496 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2500 skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
2501 struct dwarf2_cu
*cu
)
2503 unsigned int bytes_read
;
2504 struct attribute attr
;
2505 bfd
*abfd
= cu
->objfile
->obfd
;
2506 unsigned int form
, i
;
2508 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2510 /* The only abbrev we care about is DW_AT_sibling. */
2511 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2513 read_attribute (&attr
, &abbrev
->attrs
[i
],
2514 abfd
, info_ptr
, cu
);
2515 if (attr
.form
== DW_FORM_ref_addr
)
2516 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2518 return dwarf2_per_objfile
->info
.buffer
2519 + dwarf2_get_ref_die_offset (&attr
);
2522 /* If it isn't DW_AT_sibling, skip this attribute. */
2523 form
= abbrev
->attrs
[i
].form
;
2528 case DW_FORM_ref_addr
:
2529 info_ptr
+= cu
->header
.addr_size
;
2548 case DW_FORM_string
:
2549 read_string (abfd
, info_ptr
, &bytes_read
);
2550 info_ptr
+= bytes_read
;
2553 info_ptr
+= cu
->header
.offset_size
;
2556 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2557 info_ptr
+= bytes_read
;
2559 case DW_FORM_block1
:
2560 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2562 case DW_FORM_block2
:
2563 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2565 case DW_FORM_block4
:
2566 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2570 case DW_FORM_ref_udata
:
2571 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2573 case DW_FORM_indirect
:
2574 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2575 info_ptr
+= bytes_read
;
2576 /* We need to continue parsing from here, so just go back to
2578 goto skip_attribute
;
2581 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2582 dwarf_form_name (form
),
2583 bfd_get_filename (abfd
));
2587 if (abbrev
->has_children
)
2588 return skip_children (info_ptr
, cu
);
2593 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2594 the next DIE after ORIG_PDI. */
2597 locate_pdi_sibling (struct partial_die_info
*orig_pdi
, gdb_byte
*info_ptr
,
2598 bfd
*abfd
, struct dwarf2_cu
*cu
)
2600 /* Do we know the sibling already? */
2602 if (orig_pdi
->sibling
)
2603 return orig_pdi
->sibling
;
2605 /* Are there any children to deal with? */
2607 if (!orig_pdi
->has_children
)
2610 /* Skip the children the long way. */
2612 return skip_children (info_ptr
, cu
);
2615 /* Expand this partial symbol table into a full symbol table. */
2618 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2620 /* FIXME: This is barely more than a stub. */
2625 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2631 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2632 gdb_flush (gdb_stdout
);
2635 /* Restore our global data. */
2636 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2637 dwarf2_objfile_data_key
);
2639 /* If this psymtab is constructed from a debug-only objfile, the
2640 has_section_at_zero flag will not necessarily be correct. We
2641 can get the correct value for this flag by looking at the data
2642 associated with the (presumably stripped) associated objfile. */
2643 if (pst
->objfile
->separate_debug_objfile_backlink
)
2645 struct dwarf2_per_objfile
*dpo_backlink
2646 = objfile_data (pst
->objfile
->separate_debug_objfile_backlink
,
2647 dwarf2_objfile_data_key
);
2648 dwarf2_per_objfile
->has_section_at_zero
2649 = dpo_backlink
->has_section_at_zero
;
2652 psymtab_to_symtab_1 (pst
);
2654 /* Finish up the debug error message. */
2656 printf_filtered (_("done.\n"));
2661 /* Add PER_CU to the queue. */
2664 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2666 struct dwarf2_queue_item
*item
;
2669 item
= xmalloc (sizeof (*item
));
2670 item
->per_cu
= per_cu
;
2673 if (dwarf2_queue
== NULL
)
2674 dwarf2_queue
= item
;
2676 dwarf2_queue_tail
->next
= item
;
2678 dwarf2_queue_tail
= item
;
2680 /* Either PER_CU is the CU we want to process, or we're following a reference
2681 pointing into PER_CU. Either way, we need its DIEs now. */
2682 load_full_comp_unit (item
->per_cu
, objfile
);
2683 item
->per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
2684 dwarf2_per_objfile
->read_in_chain
= item
->per_cu
;
2687 /* Process the queue. */
2690 process_queue (struct objfile
*objfile
)
2692 struct dwarf2_queue_item
*item
, *next_item
;
2694 /* The queue starts out with one item, but following a DIE reference
2695 may load a new CU, adding it to the end of the queue. */
2696 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2698 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2699 process_full_comp_unit (item
->per_cu
);
2701 item
->per_cu
->queued
= 0;
2702 next_item
= item
->next
;
2706 dwarf2_queue_tail
= NULL
;
2709 /* Free all allocated queue entries. This function only releases anything if
2710 an error was thrown; if the queue was processed then it would have been
2711 freed as we went along. */
2714 dwarf2_release_queue (void *dummy
)
2716 struct dwarf2_queue_item
*item
, *last
;
2718 item
= dwarf2_queue
;
2721 /* Anything still marked queued is likely to be in an
2722 inconsistent state, so discard it. */
2723 if (item
->per_cu
->queued
)
2725 if (item
->per_cu
->cu
!= NULL
)
2726 free_one_cached_comp_unit (item
->per_cu
->cu
);
2727 item
->per_cu
->queued
= 0;
2735 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2738 /* Read in full symbols for PST, and anything it depends on. */
2741 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2743 struct dwarf2_per_cu_data
*per_cu
;
2744 struct cleanup
*back_to
;
2747 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2748 if (!pst
->dependencies
[i
]->readin
)
2750 /* Inform about additional files that need to be read in. */
2753 /* FIXME: i18n: Need to make this a single string. */
2754 fputs_filtered (" ", gdb_stdout
);
2756 fputs_filtered ("and ", gdb_stdout
);
2758 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2759 wrap_here (""); /* Flush output */
2760 gdb_flush (gdb_stdout
);
2762 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2765 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
2769 /* It's an include file, no symbols to read for it.
2770 Everything is in the parent symtab. */
2775 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2777 queue_comp_unit (per_cu
, pst
->objfile
);
2779 process_queue (pst
->objfile
);
2781 /* Age the cache, releasing compilation units that have not
2782 been used recently. */
2783 age_cached_comp_units ();
2785 do_cleanups (back_to
);
2788 /* Load the DIEs associated with PST and PER_CU into memory. */
2790 static struct dwarf2_cu
*
2791 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2793 bfd
*abfd
= objfile
->obfd
;
2794 struct dwarf2_cu
*cu
;
2795 unsigned int offset
;
2797 struct cleanup
*back_to
, *free_cu_cleanup
;
2798 struct attribute
*attr
;
2801 /* Set local variables from the partial symbol table info. */
2802 offset
= per_cu
->offset
;
2804 info_ptr
= dwarf2_per_objfile
->info
.buffer
+ offset
;
2806 cu
= xmalloc (sizeof (struct dwarf2_cu
));
2807 memset (cu
, 0, sizeof (struct dwarf2_cu
));
2809 /* If an error occurs while loading, release our storage. */
2810 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
2812 cu
->objfile
= objfile
;
2814 /* read in the comp_unit header */
2815 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
2817 /* Read the abbrevs for this compilation unit */
2818 dwarf2_read_abbrevs (abfd
, cu
);
2819 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2821 cu
->header
.offset
= offset
;
2823 cu
->per_cu
= per_cu
;
2825 cu
->type_hash
= per_cu
->type_hash
;
2827 /* We use this obstack for block values in dwarf_alloc_block. */
2828 obstack_init (&cu
->comp_unit_obstack
);
2830 cu
->dies
= read_comp_unit (info_ptr
, abfd
, cu
);
2832 /* We try not to read any attributes in this function, because not
2833 all objfiles needed for references have been loaded yet, and symbol
2834 table processing isn't initialized. But we have to set the CU language,
2835 or we won't be able to build types correctly. */
2836 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
2838 set_cu_language (DW_UNSND (attr
), cu
);
2840 set_cu_language (language_minimal
, cu
);
2842 do_cleanups (back_to
);
2844 /* We've successfully allocated this compilation unit. Let our caller
2845 clean it up when finished with it. */
2846 discard_cleanups (free_cu_cleanup
);
2851 /* Generate full symbol information for PST and CU, whose DIEs have
2852 already been loaded into memory. */
2855 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2857 struct partial_symtab
*pst
= per_cu
->psymtab
;
2858 struct dwarf2_cu
*cu
= per_cu
->cu
;
2859 struct objfile
*objfile
= pst
->objfile
;
2860 bfd
*abfd
= objfile
->obfd
;
2861 CORE_ADDR lowpc
, highpc
;
2862 struct symtab
*symtab
;
2863 struct cleanup
*back_to
;
2864 struct attribute
*attr
;
2867 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2870 back_to
= make_cleanup (really_free_pendings
, NULL
);
2872 cu
->list_in_scope
= &file_symbols
;
2874 /* Find the base address of the compilation unit for range lists and
2875 location lists. It will normally be specified by DW_AT_low_pc.
2876 In DWARF-3 draft 4, the base address could be overridden by
2877 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2878 compilation units with discontinuous ranges. */
2881 cu
->base_address
= 0;
2883 attr
= dwarf2_attr (cu
->dies
, DW_AT_entry_pc
, cu
);
2886 cu
->base_address
= DW_ADDR (attr
);
2891 attr
= dwarf2_attr (cu
->dies
, DW_AT_low_pc
, cu
);
2894 cu
->base_address
= DW_ADDR (attr
);
2899 /* Do line number decoding in read_file_scope () */
2900 process_die (cu
->dies
, cu
);
2902 /* Some compilers don't define a DW_AT_high_pc attribute for the
2903 compilation unit. If the DW_AT_high_pc is missing, synthesize
2904 it, by scanning the DIE's below the compilation unit. */
2905 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
2907 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
2909 /* Set symtab language to language from DW_AT_language.
2910 If the compilation is from a C file generated by language preprocessors,
2911 do not set the language if it was already deduced by start_subfile. */
2913 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
2915 symtab
->language
= cu
->language
;
2917 pst
->symtab
= symtab
;
2920 do_cleanups (back_to
);
2923 /* Process a die and its children. */
2926 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
2930 case DW_TAG_padding
:
2932 case DW_TAG_compile_unit
:
2933 read_file_scope (die
, cu
);
2935 case DW_TAG_subprogram
:
2936 case DW_TAG_inlined_subroutine
:
2937 read_func_scope (die
, cu
);
2939 case DW_TAG_lexical_block
:
2940 case DW_TAG_try_block
:
2941 case DW_TAG_catch_block
:
2942 read_lexical_block_scope (die
, cu
);
2944 case DW_TAG_class_type
:
2945 case DW_TAG_interface_type
:
2946 case DW_TAG_structure_type
:
2947 case DW_TAG_union_type
:
2948 process_structure_scope (die
, cu
);
2950 case DW_TAG_enumeration_type
:
2951 process_enumeration_scope (die
, cu
);
2954 /* These dies have a type, but processing them does not create
2955 a symbol or recurse to process the children. Therefore we can
2956 read them on-demand through read_type_die. */
2957 case DW_TAG_subroutine_type
:
2958 case DW_TAG_set_type
:
2959 case DW_TAG_array_type
:
2960 case DW_TAG_pointer_type
:
2961 case DW_TAG_ptr_to_member_type
:
2962 case DW_TAG_reference_type
:
2963 case DW_TAG_string_type
:
2966 case DW_TAG_base_type
:
2967 case DW_TAG_subrange_type
:
2968 case DW_TAG_typedef
:
2969 /* Add a typedef symbol for the type definition, if it has a
2971 new_symbol (die
, read_type_die (die
, cu
), cu
);
2973 case DW_TAG_common_block
:
2974 read_common_block (die
, cu
);
2976 case DW_TAG_common_inclusion
:
2978 case DW_TAG_namespace
:
2979 processing_has_namespace_info
= 1;
2980 read_namespace (die
, cu
);
2983 read_module (die
, cu
);
2985 case DW_TAG_imported_declaration
:
2986 case DW_TAG_imported_module
:
2987 processing_has_namespace_info
= 1;
2988 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
2989 || cu
->language
!= language_fortran
))
2990 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
2991 dwarf_tag_name (die
->tag
));
2992 read_import_statement (die
, cu
);
2995 new_symbol (die
, NULL
, cu
);
3000 /* Return the fully qualified name of DIE, based on its DW_AT_name.
3001 If scope qualifiers are appropriate they will be added. The result
3002 will be allocated on the objfile_obstack, or NULL if the DIE does
3006 dwarf2_full_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
3008 struct attribute
*attr
;
3009 char *prefix
, *name
;
3010 struct ui_file
*buf
= NULL
;
3012 name
= dwarf2_name (die
, cu
);
3016 /* These are the only languages we know how to qualify names in. */
3017 if (cu
->language
!= language_cplus
3018 && cu
->language
!= language_java
)
3021 /* If no prefix is necessary for this type of DIE, return the
3022 unqualified name. The other three tags listed could be handled
3023 in pdi_needs_namespace, but that requires broader changes. */
3024 if (!pdi_needs_namespace (die
->tag
)
3025 && die
->tag
!= DW_TAG_subprogram
3026 && die
->tag
!= DW_TAG_variable
3027 && die
->tag
!= DW_TAG_member
)
3030 prefix
= determine_prefix (die
, cu
);
3031 if (*prefix
!= '\0')
3032 name
= typename_concat (&cu
->objfile
->objfile_obstack
, prefix
,
3038 /* Read the import statement specified by the given die and record it. */
3041 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
3043 struct attribute
*import_attr
;
3044 struct die_info
*imported_die
;
3045 const char *imported_name
;
3046 const char *imported_name_prefix
;
3047 const char *import_prefix
;
3048 char *canonical_name
;
3050 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
3051 if (import_attr
== NULL
)
3053 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
3054 dwarf_tag_name (die
->tag
));
3058 imported_die
= follow_die_ref (die
, import_attr
, &cu
);
3059 imported_name
= dwarf2_name (imported_die
, cu
);
3060 if (imported_name
== NULL
)
3062 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
3064 The import in the following code:
3078 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
3079 <52> DW_AT_decl_file : 1
3080 <53> DW_AT_decl_line : 6
3081 <54> DW_AT_import : <0x75>
3082 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
3084 <5b> DW_AT_decl_file : 1
3085 <5c> DW_AT_decl_line : 2
3086 <5d> DW_AT_type : <0x6e>
3088 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
3089 <76> DW_AT_byte_size : 4
3090 <77> DW_AT_encoding : 5 (signed)
3092 imports the wrong die ( 0x75 instead of 0x58 ).
3093 This case will be ignored until the gcc bug is fixed. */
3097 /* FIXME: dwarf2_name (die); for the local name after import. */
3099 /* Figure out where the statement is being imported to. */
3100 import_prefix
= determine_prefix (die
, cu
);
3102 /* Figure out what the scope of the imported die is and prepend it
3103 to the name of the imported die. */
3104 imported_name_prefix
= determine_prefix (imported_die
, cu
);
3106 if (strlen (imported_name_prefix
) > 0)
3108 canonical_name
= alloca (strlen (imported_name_prefix
) + 2 + strlen (imported_name
) + 1);
3109 strcpy (canonical_name
, imported_name_prefix
);
3110 strcat (canonical_name
, "::");
3111 strcat (canonical_name
, imported_name
);
3115 canonical_name
= alloca (strlen (imported_name
) + 1);
3116 strcpy (canonical_name
, imported_name
);
3119 using_directives
= cp_add_using (import_prefix
,canonical_name
, using_directives
);
3123 initialize_cu_func_list (struct dwarf2_cu
*cu
)
3125 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
3129 free_cu_line_header (void *arg
)
3131 struct dwarf2_cu
*cu
= arg
;
3133 free_line_header (cu
->line_header
);
3134 cu
->line_header
= NULL
;
3138 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3140 struct objfile
*objfile
= cu
->objfile
;
3141 struct comp_unit_head
*cu_header
= &cu
->header
;
3142 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
3143 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
3144 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
3145 struct attribute
*attr
;
3147 char *comp_dir
= NULL
;
3148 struct die_info
*child_die
;
3149 bfd
*abfd
= objfile
->obfd
;
3150 struct line_header
*line_header
= 0;
3153 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3155 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
3157 /* If we didn't find a lowpc, set it to highpc to avoid complaints
3158 from finish_block. */
3159 if (lowpc
== ((CORE_ADDR
) -1))
3164 /* Find the filename. Do not use dwarf2_name here, since the filename
3165 is not a source language identifier. */
3166 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
3169 name
= DW_STRING (attr
);
3172 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
3174 comp_dir
= DW_STRING (attr
);
3175 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
3177 comp_dir
= ldirname (name
);
3178 if (comp_dir
!= NULL
)
3179 make_cleanup (xfree
, comp_dir
);
3181 if (comp_dir
!= NULL
)
3183 /* Irix 6.2 native cc prepends <machine>.: to the compilation
3184 directory, get rid of it. */
3185 char *cp
= strchr (comp_dir
, ':');
3187 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
3194 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
3197 set_cu_language (DW_UNSND (attr
), cu
);
3200 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
3202 cu
->producer
= DW_STRING (attr
);
3204 /* We assume that we're processing GCC output. */
3205 processing_gcc_compilation
= 2;
3207 processing_has_namespace_info
= 0;
3209 start_symtab (name
, comp_dir
, lowpc
);
3210 record_debugformat ("DWARF 2");
3211 record_producer (cu
->producer
);
3213 initialize_cu_func_list (cu
);
3215 /* Decode line number information if present. We do this before
3216 processing child DIEs, so that the line header table is available
3217 for DW_AT_decl_file. */
3218 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
3221 unsigned int line_offset
= DW_UNSND (attr
);
3222 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
3225 cu
->line_header
= line_header
;
3226 make_cleanup (free_cu_line_header
, cu
);
3227 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
3231 /* Process all dies in compilation unit. */
3232 if (die
->child
!= NULL
)
3234 child_die
= die
->child
;
3235 while (child_die
&& child_die
->tag
)
3237 process_die (child_die
, cu
);
3238 child_die
= sibling_die (child_die
);
3242 /* Decode macro information, if present. Dwarf 2 macro information
3243 refers to information in the line number info statement program
3244 header, so we can only read it if we've read the header
3246 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
3247 if (attr
&& line_header
)
3249 unsigned int macro_offset
= DW_UNSND (attr
);
3250 dwarf_decode_macros (line_header
, macro_offset
,
3251 comp_dir
, abfd
, cu
);
3253 do_cleanups (back_to
);
3257 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
3258 struct dwarf2_cu
*cu
)
3260 struct function_range
*thisfn
;
3262 thisfn
= (struct function_range
*)
3263 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
3264 thisfn
->name
= name
;
3265 thisfn
->lowpc
= lowpc
;
3266 thisfn
->highpc
= highpc
;
3267 thisfn
->seen_line
= 0;
3268 thisfn
->next
= NULL
;
3270 if (cu
->last_fn
== NULL
)
3271 cu
->first_fn
= thisfn
;
3273 cu
->last_fn
->next
= thisfn
;
3275 cu
->last_fn
= thisfn
;
3278 /* qsort helper for inherit_abstract_dies. */
3281 unsigned_int_compar (const void *ap
, const void *bp
)
3283 unsigned int a
= *(unsigned int *) ap
;
3284 unsigned int b
= *(unsigned int *) bp
;
3286 return (a
> b
) - (b
> a
);
3289 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
3290 Inherit only the children of the DW_AT_abstract_origin DIE not being already
3291 referenced by DW_AT_abstract_origin from the children of the current DIE. */
3294 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
3296 struct die_info
*child_die
;
3297 unsigned die_children_count
;
3298 /* CU offsets which were referenced by children of the current DIE. */
3300 unsigned *offsets_end
, *offsetp
;
3301 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
3302 struct die_info
*origin_die
;
3303 /* Iterator of the ORIGIN_DIE children. */
3304 struct die_info
*origin_child_die
;
3305 struct cleanup
*cleanups
;
3306 struct attribute
*attr
;
3308 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
3312 origin_die
= follow_die_ref (die
, attr
, &cu
);
3313 if (die
->tag
!= origin_die
->tag
3314 && !(die
->tag
== DW_TAG_inlined_subroutine
3315 && origin_die
->tag
== DW_TAG_subprogram
))
3316 complaint (&symfile_complaints
,
3317 _("DIE 0x%x and its abstract origin 0x%x have different tags"),
3318 die
->offset
, origin_die
->offset
);
3320 child_die
= die
->child
;
3321 die_children_count
= 0;
3322 while (child_die
&& child_die
->tag
)
3324 child_die
= sibling_die (child_die
);
3325 die_children_count
++;
3327 offsets
= xmalloc (sizeof (*offsets
) * die_children_count
);
3328 cleanups
= make_cleanup (xfree
, offsets
);
3330 offsets_end
= offsets
;
3331 child_die
= die
->child
;
3332 while (child_die
&& child_die
->tag
)
3334 /* For each CHILD_DIE, find the corresponding child of
3335 ORIGIN_DIE. If there is more than one layer of
3336 DW_AT_abstract_origin, follow them all; there shouldn't be,
3337 but GCC versions at least through 4.4 generate this (GCC PR
3339 struct die_info
*child_origin_die
= child_die
;
3342 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
, cu
);
3345 child_origin_die
= follow_die_ref (child_origin_die
, attr
, &cu
);
3348 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
3349 counterpart may exist. */
3350 if (child_origin_die
!= child_die
)
3352 if (child_die
->tag
!= child_origin_die
->tag
3353 && !(child_die
->tag
== DW_TAG_inlined_subroutine
3354 && child_origin_die
->tag
== DW_TAG_subprogram
))
3355 complaint (&symfile_complaints
,
3356 _("Child DIE 0x%x and its abstract origin 0x%x have "
3357 "different tags"), child_die
->offset
,
3358 child_origin_die
->offset
);
3359 if (child_origin_die
->parent
!= origin_die
)
3360 complaint (&symfile_complaints
,
3361 _("Child DIE 0x%x and its abstract origin 0x%x have "
3362 "different parents"), child_die
->offset
,
3363 child_origin_die
->offset
);
3365 *offsets_end
++ = child_origin_die
->offset
;
3367 child_die
= sibling_die (child_die
);
3369 qsort (offsets
, offsets_end
- offsets
, sizeof (*offsets
),
3370 unsigned_int_compar
);
3371 for (offsetp
= offsets
+ 1; offsetp
< offsets_end
; offsetp
++)
3372 if (offsetp
[-1] == *offsetp
)
3373 complaint (&symfile_complaints
, _("Multiple children of DIE 0x%x refer "
3374 "to DIE 0x%x as their abstract origin"),
3375 die
->offset
, *offsetp
);
3378 origin_child_die
= origin_die
->child
;
3379 while (origin_child_die
&& origin_child_die
->tag
)
3381 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
3382 while (offsetp
< offsets_end
&& *offsetp
< origin_child_die
->offset
)
3384 if (offsetp
>= offsets_end
|| *offsetp
> origin_child_die
->offset
)
3386 /* Found that ORIGIN_CHILD_DIE is really not referenced. */
3387 process_die (origin_child_die
, cu
);
3389 origin_child_die
= sibling_die (origin_child_die
);
3392 do_cleanups (cleanups
);
3396 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3398 struct objfile
*objfile
= cu
->objfile
;
3399 struct context_stack
*new;
3402 struct die_info
*child_die
;
3403 struct attribute
*attr
, *call_line
, *call_file
;
3406 struct block
*block
;
3407 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
3411 /* If we do not have call site information, we can't show the
3412 caller of this inlined function. That's too confusing, so
3413 only use the scope for local variables. */
3414 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
3415 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
3416 if (call_line
== NULL
|| call_file
== NULL
)
3418 read_lexical_block_scope (die
, cu
);
3423 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3425 name
= dwarf2_linkage_name (die
, cu
);
3427 /* Ignore functions with missing or empty names and functions with
3428 missing or invalid low and high pc attributes. */
3429 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
3435 /* Record the function range for dwarf_decode_lines. */
3436 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
3438 new = push_context (0, lowpc
);
3439 new->name
= new_symbol (die
, read_type_die (die
, cu
), cu
);
3441 /* If there is a location expression for DW_AT_frame_base, record
3443 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
3445 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
3446 expression is being recorded directly in the function's symbol
3447 and not in a separate frame-base object. I guess this hack is
3448 to avoid adding some sort of frame-base adjunct/annex to the
3449 function's symbol :-(. The problem with doing this is that it
3450 results in a function symbol with a location expression that
3451 has nothing to do with the location of the function, ouch! The
3452 relationship should be: a function's symbol has-a frame base; a
3453 frame-base has-a location expression. */
3454 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3456 cu
->list_in_scope
= &local_symbols
;
3458 if (die
->child
!= NULL
)
3460 child_die
= die
->child
;
3461 while (child_die
&& child_die
->tag
)
3463 process_die (child_die
, cu
);
3464 child_die
= sibling_die (child_die
);
3468 inherit_abstract_dies (die
, cu
);
3470 new = pop_context ();
3471 /* Make a block for the local symbols within. */
3472 block
= finish_block (new->name
, &local_symbols
, new->old_blocks
,
3473 lowpc
, highpc
, objfile
);
3475 /* For C++, set the block's scope. */
3476 if (cu
->language
== language_cplus
)
3477 cp_set_block_scope (new->name
, block
, &objfile
->objfile_obstack
,
3478 determine_prefix (die
, cu
),
3479 processing_has_namespace_info
);
3481 /* If we have address ranges, record them. */
3482 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3484 /* In C++, we can have functions nested inside functions (e.g., when
3485 a function declares a class that has methods). This means that
3486 when we finish processing a function scope, we may need to go
3487 back to building a containing block's symbol lists. */
3488 local_symbols
= new->locals
;
3489 param_symbols
= new->params
;
3490 using_directives
= new->using_directives
;
3492 /* If we've finished processing a top-level function, subsequent
3493 symbols go in the file symbol list. */
3494 if (outermost_context_p ())
3495 cu
->list_in_scope
= &file_symbols
;
3498 /* Process all the DIES contained within a lexical block scope. Start
3499 a new scope, process the dies, and then close the scope. */
3502 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3504 struct objfile
*objfile
= cu
->objfile
;
3505 struct context_stack
*new;
3506 CORE_ADDR lowpc
, highpc
;
3507 struct die_info
*child_die
;
3510 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3512 /* Ignore blocks with missing or invalid low and high pc attributes. */
3513 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3514 as multiple lexical blocks? Handling children in a sane way would
3515 be nasty. Might be easier to properly extend generic blocks to
3517 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
3522 push_context (0, lowpc
);
3523 if (die
->child
!= NULL
)
3525 child_die
= die
->child
;
3526 while (child_die
&& child_die
->tag
)
3528 process_die (child_die
, cu
);
3529 child_die
= sibling_die (child_die
);
3532 new = pop_context ();
3534 if (local_symbols
!= NULL
)
3537 = finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3540 /* Note that recording ranges after traversing children, as we
3541 do here, means that recording a parent's ranges entails
3542 walking across all its children's ranges as they appear in
3543 the address map, which is quadratic behavior.
3545 It would be nicer to record the parent's ranges before
3546 traversing its children, simply overriding whatever you find
3547 there. But since we don't even decide whether to create a
3548 block until after we've traversed its children, that's hard
3550 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
3552 local_symbols
= new->locals
;
3553 using_directives
= new->using_directives
;
3556 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
3557 Return 1 if the attributes are present and valid, otherwise, return 0.
3558 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
3561 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
3562 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
3563 struct partial_symtab
*ranges_pst
)
3565 struct objfile
*objfile
= cu
->objfile
;
3566 struct comp_unit_head
*cu_header
= &cu
->header
;
3567 bfd
*obfd
= objfile
->obfd
;
3568 unsigned int addr_size
= cu_header
->addr_size
;
3569 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3570 /* Base address selection entry. */
3581 found_base
= cu
->base_known
;
3582 base
= cu
->base_address
;
3584 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
3586 complaint (&symfile_complaints
,
3587 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3591 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
3593 /* Read in the largest possible address. */
3594 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
3595 if ((marker
& mask
) == mask
)
3597 /* If we found the largest possible address, then
3598 read the base address. */
3599 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3600 buffer
+= 2 * addr_size
;
3601 offset
+= 2 * addr_size
;
3607 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3611 CORE_ADDR range_beginning
, range_end
;
3613 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
3614 buffer
+= addr_size
;
3615 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
3616 buffer
+= addr_size
;
3617 offset
+= 2 * addr_size
;
3619 /* An end of list marker is a pair of zero addresses. */
3620 if (range_beginning
== 0 && range_end
== 0)
3621 /* Found the end of list entry. */
3624 /* Each base address selection entry is a pair of 2 values.
3625 The first is the largest possible address, the second is
3626 the base address. Check for a base address here. */
3627 if ((range_beginning
& mask
) == mask
)
3629 /* If we found the largest possible address, then
3630 read the base address. */
3631 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3638 /* We have no valid base address for the ranges
3640 complaint (&symfile_complaints
,
3641 _("Invalid .debug_ranges data (no base address)"));
3645 range_beginning
+= base
;
3648 if (ranges_pst
!= NULL
&& range_beginning
< range_end
)
3649 addrmap_set_empty (objfile
->psymtabs_addrmap
,
3650 range_beginning
+ baseaddr
, range_end
- 1 + baseaddr
,
3653 /* FIXME: This is recording everything as a low-high
3654 segment of consecutive addresses. We should have a
3655 data structure for discontiguous block ranges
3659 low
= range_beginning
;
3665 if (range_beginning
< low
)
3666 low
= range_beginning
;
3667 if (range_end
> high
)
3673 /* If the first entry is an end-of-list marker, the range
3674 describes an empty scope, i.e. no instructions. */
3680 *high_return
= high
;
3684 /* Get low and high pc attributes from a die. Return 1 if the attributes
3685 are present and valid, otherwise, return 0. Return -1 if the range is
3686 discontinuous, i.e. derived from DW_AT_ranges information. */
3688 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
3689 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
3691 struct attribute
*attr
;
3696 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3699 high
= DW_ADDR (attr
);
3700 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3702 low
= DW_ADDR (attr
);
3704 /* Found high w/o low attribute. */
3707 /* Found consecutive range of addresses. */
3712 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3715 /* Value of the DW_AT_ranges attribute is the offset in the
3716 .debug_ranges section. */
3717 if (!dwarf2_ranges_read (DW_UNSND (attr
), &low
, &high
, cu
, NULL
))
3719 /* Found discontinuous range of addresses. */
3727 /* When using the GNU linker, .gnu.linkonce. sections are used to
3728 eliminate duplicate copies of functions and vtables and such.
3729 The linker will arbitrarily choose one and discard the others.
3730 The AT_*_pc values for such functions refer to local labels in
3731 these sections. If the section from that file was discarded, the
3732 labels are not in the output, so the relocs get a value of 0.
3733 If this is a discarded function, mark the pc bounds as invalid,
3734 so that GDB will ignore it. */
3735 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3743 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
3744 its low and high PC addresses. Do nothing if these addresses could not
3745 be determined. Otherwise, set LOWPC to the low address if it is smaller,
3746 and HIGHPC to the high address if greater than HIGHPC. */
3749 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
3750 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3751 struct dwarf2_cu
*cu
)
3753 CORE_ADDR low
, high
;
3754 struct die_info
*child
= die
->child
;
3756 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
))
3758 *lowpc
= min (*lowpc
, low
);
3759 *highpc
= max (*highpc
, high
);
3762 /* If the language does not allow nested subprograms (either inside
3763 subprograms or lexical blocks), we're done. */
3764 if (cu
->language
!= language_ada
)
3767 /* Check all the children of the given DIE. If it contains nested
3768 subprograms, then check their pc bounds. Likewise, we need to
3769 check lexical blocks as well, as they may also contain subprogram
3771 while (child
&& child
->tag
)
3773 if (child
->tag
== DW_TAG_subprogram
3774 || child
->tag
== DW_TAG_lexical_block
)
3775 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
3776 child
= sibling_die (child
);
3780 /* Get the low and high pc's represented by the scope DIE, and store
3781 them in *LOWPC and *HIGHPC. If the correct values can't be
3782 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3785 get_scope_pc_bounds (struct die_info
*die
,
3786 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3787 struct dwarf2_cu
*cu
)
3789 CORE_ADDR best_low
= (CORE_ADDR
) -1;
3790 CORE_ADDR best_high
= (CORE_ADDR
) 0;
3791 CORE_ADDR current_low
, current_high
;
3793 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
))
3795 best_low
= current_low
;
3796 best_high
= current_high
;
3800 struct die_info
*child
= die
->child
;
3802 while (child
&& child
->tag
)
3804 switch (child
->tag
) {
3805 case DW_TAG_subprogram
:
3806 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
3808 case DW_TAG_namespace
:
3809 /* FIXME: carlton/2004-01-16: Should we do this for
3810 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3811 that current GCC's always emit the DIEs corresponding
3812 to definitions of methods of classes as children of a
3813 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3814 the DIEs giving the declarations, which could be
3815 anywhere). But I don't see any reason why the
3816 standards says that they have to be there. */
3817 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
3819 if (current_low
!= ((CORE_ADDR
) -1))
3821 best_low
= min (best_low
, current_low
);
3822 best_high
= max (best_high
, current_high
);
3830 child
= sibling_die (child
);
3835 *highpc
= best_high
;
3838 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
3841 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
3842 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
3844 struct attribute
*attr
;
3846 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3849 CORE_ADDR high
= DW_ADDR (attr
);
3850 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3853 CORE_ADDR low
= DW_ADDR (attr
);
3854 record_block_range (block
, baseaddr
+ low
, baseaddr
+ high
- 1);
3858 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3861 bfd
*obfd
= cu
->objfile
->obfd
;
3863 /* The value of the DW_AT_ranges attribute is the offset of the
3864 address range list in the .debug_ranges section. */
3865 unsigned long offset
= DW_UNSND (attr
);
3866 gdb_byte
*buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
3868 /* For some target architectures, but not others, the
3869 read_address function sign-extends the addresses it returns.
3870 To recognize base address selection entries, we need a
3872 unsigned int addr_size
= cu
->header
.addr_size
;
3873 CORE_ADDR base_select_mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3875 /* The base address, to which the next pair is relative. Note
3876 that this 'base' is a DWARF concept: most entries in a range
3877 list are relative, to reduce the number of relocs against the
3878 debugging information. This is separate from this function's
3879 'baseaddr' argument, which GDB uses to relocate debugging
3880 information from a shared library based on the address at
3881 which the library was loaded. */
3882 CORE_ADDR base
= cu
->base_address
;
3883 int base_known
= cu
->base_known
;
3885 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
3887 complaint (&symfile_complaints
,
3888 _("Offset %lu out of bounds for DW_AT_ranges attribute"),
3895 unsigned int bytes_read
;
3896 CORE_ADDR start
, end
;
3898 start
= read_address (obfd
, buffer
, cu
, &bytes_read
);
3899 buffer
+= bytes_read
;
3900 end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
3901 buffer
+= bytes_read
;
3903 /* Did we find the end of the range list? */
3904 if (start
== 0 && end
== 0)
3907 /* Did we find a base address selection entry? */
3908 else if ((start
& base_select_mask
) == base_select_mask
)
3914 /* We found an ordinary address range. */
3919 complaint (&symfile_complaints
,
3920 _("Invalid .debug_ranges data (no base address)"));
3924 record_block_range (block
,
3925 baseaddr
+ base
+ start
,
3926 baseaddr
+ base
+ end
- 1);
3932 /* Add an aggregate field to the field list. */
3935 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
3936 struct dwarf2_cu
*cu
)
3938 struct objfile
*objfile
= cu
->objfile
;
3939 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3940 struct nextfield
*new_field
;
3941 struct attribute
*attr
;
3943 char *fieldname
= "";
3945 /* Allocate a new field list entry and link it in. */
3946 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3947 make_cleanup (xfree
, new_field
);
3948 memset (new_field
, 0, sizeof (struct nextfield
));
3949 new_field
->next
= fip
->fields
;
3950 fip
->fields
= new_field
;
3953 /* Handle accessibility and virtuality of field.
3954 The default accessibility for members is public, the default
3955 accessibility for inheritance is private. */
3956 if (die
->tag
!= DW_TAG_inheritance
)
3957 new_field
->accessibility
= DW_ACCESS_public
;
3959 new_field
->accessibility
= DW_ACCESS_private
;
3960 new_field
->virtuality
= DW_VIRTUALITY_none
;
3962 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3964 new_field
->accessibility
= DW_UNSND (attr
);
3965 if (new_field
->accessibility
!= DW_ACCESS_public
)
3966 fip
->non_public_fields
= 1;
3967 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
3969 new_field
->virtuality
= DW_UNSND (attr
);
3971 fp
= &new_field
->field
;
3973 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
3975 /* Data member other than a C++ static data member. */
3977 /* Get type of field. */
3978 fp
->type
= die_type (die
, cu
);
3980 SET_FIELD_BITPOS (*fp
, 0);
3982 /* Get bit size of field (zero if none). */
3983 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
3986 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
3990 FIELD_BITSIZE (*fp
) = 0;
3993 /* Get bit offset of field. */
3994 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3999 if (attr_form_is_section_offset (attr
))
4001 dwarf2_complex_location_expr_complaint ();
4004 else if (attr_form_is_constant (attr
))
4005 byte_offset
= dwarf2_get_attr_constant_value (attr
, 0);
4007 byte_offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
4009 SET_FIELD_BITPOS (*fp
, byte_offset
* bits_per_byte
);
4011 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
4014 if (gdbarch_bits_big_endian (gdbarch
))
4016 /* For big endian bits, the DW_AT_bit_offset gives the
4017 additional bit offset from the MSB of the containing
4018 anonymous object to the MSB of the field. We don't
4019 have to do anything special since we don't need to
4020 know the size of the anonymous object. */
4021 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
4025 /* For little endian bits, compute the bit offset to the
4026 MSB of the anonymous object, subtract off the number of
4027 bits from the MSB of the field to the MSB of the
4028 object, and then subtract off the number of bits of
4029 the field itself. The result is the bit offset of
4030 the LSB of the field. */
4032 int bit_offset
= DW_UNSND (attr
);
4034 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4037 /* The size of the anonymous object containing
4038 the bit field is explicit, so use the
4039 indicated size (in bytes). */
4040 anonymous_size
= DW_UNSND (attr
);
4044 /* The size of the anonymous object containing
4045 the bit field must be inferred from the type
4046 attribute of the data member containing the
4048 anonymous_size
= TYPE_LENGTH (fp
->type
);
4050 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
4051 - bit_offset
- FIELD_BITSIZE (*fp
);
4055 /* Get name of field. */
4056 fieldname
= dwarf2_name (die
, cu
);
4057 if (fieldname
== NULL
)
4060 /* The name is already allocated along with this objfile, so we don't
4061 need to duplicate it for the type. */
4062 fp
->name
= fieldname
;
4064 /* Change accessibility for artificial fields (e.g. virtual table
4065 pointer or virtual base class pointer) to private. */
4066 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
4068 new_field
->accessibility
= DW_ACCESS_private
;
4069 fip
->non_public_fields
= 1;
4072 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
4074 /* C++ static member. */
4076 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
4077 is a declaration, but all versions of G++ as of this writing
4078 (so through at least 3.2.1) incorrectly generate
4079 DW_TAG_variable tags. */
4083 /* Get name of field. */
4084 fieldname
= dwarf2_name (die
, cu
);
4085 if (fieldname
== NULL
)
4088 /* Get physical name. */
4089 physname
= dwarf2_linkage_name (die
, cu
);
4091 /* The name is already allocated along with this objfile, so we don't
4092 need to duplicate it for the type. */
4093 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
4094 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4095 FIELD_NAME (*fp
) = fieldname
;
4097 else if (die
->tag
== DW_TAG_inheritance
)
4099 /* C++ base class field. */
4100 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
4102 SET_FIELD_BITPOS (*fp
, decode_locdesc (DW_BLOCK (attr
), cu
)
4104 FIELD_BITSIZE (*fp
) = 0;
4105 FIELD_TYPE (*fp
) = die_type (die
, cu
);
4106 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
4107 fip
->nbaseclasses
++;
4111 /* Create the vector of fields, and attach it to the type. */
4114 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
4115 struct dwarf2_cu
*cu
)
4117 int nfields
= fip
->nfields
;
4119 /* Record the field count, allocate space for the array of fields,
4120 and create blank accessibility bitfields if necessary. */
4121 TYPE_NFIELDS (type
) = nfields
;
4122 TYPE_FIELDS (type
) = (struct field
*)
4123 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
4124 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
4126 if (fip
->non_public_fields
)
4128 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4130 TYPE_FIELD_PRIVATE_BITS (type
) =
4131 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4132 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
4134 TYPE_FIELD_PROTECTED_BITS (type
) =
4135 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4136 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
4138 TYPE_FIELD_IGNORE_BITS (type
) =
4139 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
4140 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
4143 /* If the type has baseclasses, allocate and clear a bit vector for
4144 TYPE_FIELD_VIRTUAL_BITS. */
4145 if (fip
->nbaseclasses
)
4147 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
4148 unsigned char *pointer
;
4150 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4151 pointer
= TYPE_ALLOC (type
, num_bytes
);
4152 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
4153 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
4154 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
4157 /* Copy the saved-up fields into the field vector. Start from the head
4158 of the list, adding to the tail of the field array, so that they end
4159 up in the same order in the array in which they were added to the list. */
4160 while (nfields
-- > 0)
4162 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
4163 switch (fip
->fields
->accessibility
)
4165 case DW_ACCESS_private
:
4166 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
4169 case DW_ACCESS_protected
:
4170 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
4173 case DW_ACCESS_public
:
4177 /* Unknown accessibility. Complain and treat it as public. */
4179 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
4180 fip
->fields
->accessibility
);
4184 if (nfields
< fip
->nbaseclasses
)
4186 switch (fip
->fields
->virtuality
)
4188 case DW_VIRTUALITY_virtual
:
4189 case DW_VIRTUALITY_pure_virtual
:
4190 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
4194 fip
->fields
= fip
->fields
->next
;
4198 /* Add a member function to the proper fieldlist. */
4201 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
4202 struct type
*type
, struct dwarf2_cu
*cu
)
4204 struct objfile
*objfile
= cu
->objfile
;
4205 struct attribute
*attr
;
4206 struct fnfieldlist
*flp
;
4208 struct fn_field
*fnp
;
4211 struct nextfnfield
*new_fnfield
;
4212 struct type
*this_type
;
4214 /* Get name of member function. */
4215 fieldname
= dwarf2_name (die
, cu
);
4216 if (fieldname
== NULL
)
4219 /* Get the mangled name. */
4220 physname
= dwarf2_linkage_name (die
, cu
);
4222 /* Look up member function name in fieldlist. */
4223 for (i
= 0; i
< fip
->nfnfields
; i
++)
4225 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
4229 /* Create new list element if necessary. */
4230 if (i
< fip
->nfnfields
)
4231 flp
= &fip
->fnfieldlists
[i
];
4234 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4236 fip
->fnfieldlists
= (struct fnfieldlist
*)
4237 xrealloc (fip
->fnfieldlists
,
4238 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
4239 * sizeof (struct fnfieldlist
));
4240 if (fip
->nfnfields
== 0)
4241 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
4243 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
4244 flp
->name
= fieldname
;
4250 /* Create a new member function field and chain it to the field list
4252 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
4253 make_cleanup (xfree
, new_fnfield
);
4254 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
4255 new_fnfield
->next
= flp
->head
;
4256 flp
->head
= new_fnfield
;
4259 /* Fill in the member function field info. */
4260 fnp
= &new_fnfield
->fnfield
;
4261 /* The name is already allocated along with this objfile, so we don't
4262 need to duplicate it for the type. */
4263 fnp
->physname
= physname
? physname
: "";
4264 fnp
->type
= alloc_type (objfile
);
4265 this_type
= read_type_die (die
, cu
);
4266 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
4268 int nparams
= TYPE_NFIELDS (this_type
);
4270 /* TYPE is the domain of this method, and THIS_TYPE is the type
4271 of the method itself (TYPE_CODE_METHOD). */
4272 smash_to_method_type (fnp
->type
, type
,
4273 TYPE_TARGET_TYPE (this_type
),
4274 TYPE_FIELDS (this_type
),
4275 TYPE_NFIELDS (this_type
),
4276 TYPE_VARARGS (this_type
));
4278 /* Handle static member functions.
4279 Dwarf2 has no clean way to discern C++ static and non-static
4280 member functions. G++ helps GDB by marking the first
4281 parameter for non-static member functions (which is the
4282 this pointer) as artificial. We obtain this information
4283 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
4284 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
4285 fnp
->voffset
= VOFFSET_STATIC
;
4288 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
4291 /* Get fcontext from DW_AT_containing_type if present. */
4292 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4293 fnp
->fcontext
= die_containing_type (die
, cu
);
4295 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
4296 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
4298 /* Get accessibility. */
4299 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
4302 switch (DW_UNSND (attr
))
4304 case DW_ACCESS_private
:
4305 fnp
->is_private
= 1;
4307 case DW_ACCESS_protected
:
4308 fnp
->is_protected
= 1;
4313 /* Check for artificial methods. */
4314 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
4315 if (attr
&& DW_UNSND (attr
) != 0)
4316 fnp
->is_artificial
= 1;
4318 /* Get index in virtual function table if it is a virtual member function. */
4319 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
4322 /* Support the .debug_loc offsets */
4323 if (attr_form_is_block (attr
))
4325 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
4327 else if (attr_form_is_section_offset (attr
))
4329 dwarf2_complex_location_expr_complaint ();
4333 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
4339 /* Create the vector of member function fields, and attach it to the type. */
4342 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
4343 struct dwarf2_cu
*cu
)
4345 struct fnfieldlist
*flp
;
4346 int total_length
= 0;
4349 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
4350 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
4351 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
4353 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
4355 struct nextfnfield
*nfp
= flp
->head
;
4356 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
4359 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
4360 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
4361 fn_flp
->fn_fields
= (struct fn_field
*)
4362 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
4363 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
4364 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
4366 total_length
+= flp
->length
;
4369 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
4370 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
4373 /* Returns non-zero if NAME is the name of a vtable member in CU's
4374 language, zero otherwise. */
4376 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
4378 static const char vptr
[] = "_vptr";
4379 static const char vtable
[] = "vtable";
4381 /* Look for the C++ and Java forms of the vtable. */
4382 if ((cu
->language
== language_java
4383 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
4384 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
4385 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
4391 /* GCC outputs unnamed structures that are really pointers to member
4392 functions, with the ABI-specified layout. If DIE (from CU) describes
4393 such a structure, set its type, and return nonzero. Otherwise return
4396 GCC shouldn't do this; it should just output pointer to member DIEs.
4397 This is GCC PR debug/28767. */
4399 static struct type
*
4400 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
4402 struct objfile
*objfile
= cu
->objfile
;
4404 struct die_info
*pfn_die
, *delta_die
;
4405 struct attribute
*pfn_name
, *delta_name
;
4406 struct type
*pfn_type
, *domain_type
;
4408 /* Check for a structure with no name and two children. */
4409 if (die
->tag
!= DW_TAG_structure_type
4410 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
4411 || die
->child
== NULL
4412 || die
->child
->sibling
== NULL
4413 || (die
->child
->sibling
->sibling
!= NULL
4414 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
4417 /* Check for __pfn and __delta members. */
4418 pfn_die
= die
->child
;
4419 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
4420 if (pfn_die
->tag
!= DW_TAG_member
4422 || DW_STRING (pfn_name
) == NULL
4423 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
4426 delta_die
= pfn_die
->sibling
;
4427 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
4428 if (delta_die
->tag
!= DW_TAG_member
4429 || delta_name
== NULL
4430 || DW_STRING (delta_name
) == NULL
4431 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
4434 /* Find the type of the method. */
4435 pfn_type
= die_type (pfn_die
, cu
);
4436 if (pfn_type
== NULL
4437 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
4438 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
4441 /* Look for the "this" argument. */
4442 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
4443 if (TYPE_NFIELDS (pfn_type
) == 0
4444 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
4447 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
4448 type
= alloc_type (objfile
);
4449 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
4450 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
4451 TYPE_VARARGS (pfn_type
));
4452 type
= lookup_methodptr_type (type
);
4453 return set_die_type (die
, type
, cu
);
4456 /* Called when we find the DIE that starts a structure or union scope
4457 (definition) to process all dies that define the members of the
4460 NOTE: we need to call struct_type regardless of whether or not the
4461 DIE has an at_name attribute, since it might be an anonymous
4462 structure or union. This gets the type entered into our set of
4465 However, if the structure is incomplete (an opaque struct/union)
4466 then suppress creating a symbol table entry for it since gdb only
4467 wants to find the one with the complete definition. Note that if
4468 it is complete, we just call new_symbol, which does it's own
4469 checking about whether the struct/union is anonymous or not (and
4470 suppresses creating a symbol table entry itself). */
4472 static struct type
*
4473 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4475 struct objfile
*objfile
= cu
->objfile
;
4477 struct attribute
*attr
;
4479 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4481 type
= quirk_gcc_member_function_pointer (die
, cu
);
4485 type
= alloc_type (objfile
);
4486 INIT_CPLUS_SPECIFIC (type
);
4487 name
= dwarf2_name (die
, cu
);
4490 if (cu
->language
== language_cplus
4491 || cu
->language
== language_java
)
4493 const char *new_prefix
= determine_class_name (die
, cu
);
4494 TYPE_TAG_NAME (type
) = (char *) new_prefix
;
4498 /* The name is already allocated along with this objfile, so
4499 we don't need to duplicate it for the type. */
4500 TYPE_TAG_NAME (type
) = name
;
4504 if (die
->tag
== DW_TAG_structure_type
)
4506 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
4508 else if (die
->tag
== DW_TAG_union_type
)
4510 TYPE_CODE (type
) = TYPE_CODE_UNION
;
4514 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
4516 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
4519 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4522 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4526 TYPE_LENGTH (type
) = 0;
4529 TYPE_STUB_SUPPORTED (type
) = 1;
4530 if (die_is_declaration (die
, cu
))
4531 TYPE_STUB (type
) = 1;
4533 /* We need to add the type field to the die immediately so we don't
4534 infinitely recurse when dealing with pointers to the structure
4535 type within the structure itself. */
4536 set_die_type (die
, type
, cu
);
4538 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
4540 struct field_info fi
;
4541 struct die_info
*child_die
;
4543 memset (&fi
, 0, sizeof (struct field_info
));
4545 child_die
= die
->child
;
4547 while (child_die
&& child_die
->tag
)
4549 if (child_die
->tag
== DW_TAG_member
4550 || child_die
->tag
== DW_TAG_variable
)
4552 /* NOTE: carlton/2002-11-05: A C++ static data member
4553 should be a DW_TAG_member that is a declaration, but
4554 all versions of G++ as of this writing (so through at
4555 least 3.2.1) incorrectly generate DW_TAG_variable
4556 tags for them instead. */
4557 dwarf2_add_field (&fi
, child_die
, cu
);
4559 else if (child_die
->tag
== DW_TAG_subprogram
)
4561 /* C++ member function. */
4562 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
4564 else if (child_die
->tag
== DW_TAG_inheritance
)
4566 /* C++ base class field. */
4567 dwarf2_add_field (&fi
, child_die
, cu
);
4569 child_die
= sibling_die (child_die
);
4572 /* Attach fields and member functions to the type. */
4574 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
4577 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
4579 /* Get the type which refers to the base class (possibly this
4580 class itself) which contains the vtable pointer for the current
4581 class from the DW_AT_containing_type attribute. */
4583 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
4585 struct type
*t
= die_containing_type (die
, cu
);
4587 TYPE_VPTR_BASETYPE (type
) = t
;
4592 /* Our own class provides vtbl ptr. */
4593 for (i
= TYPE_NFIELDS (t
) - 1;
4594 i
>= TYPE_N_BASECLASSES (t
);
4597 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
4599 if (is_vtable_name (fieldname
, cu
))
4601 TYPE_VPTR_FIELDNO (type
) = i
;
4606 /* Complain if virtual function table field not found. */
4607 if (i
< TYPE_N_BASECLASSES (t
))
4608 complaint (&symfile_complaints
,
4609 _("virtual function table pointer not found when defining class '%s'"),
4610 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
4615 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
4618 else if (cu
->producer
4619 && strncmp (cu
->producer
,
4620 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
4622 /* The IBM XLC compiler does not provide direct indication
4623 of the containing type, but the vtable pointer is
4624 always named __vfp. */
4628 for (i
= TYPE_NFIELDS (type
) - 1;
4629 i
>= TYPE_N_BASECLASSES (type
);
4632 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
4634 TYPE_VPTR_FIELDNO (type
) = i
;
4635 TYPE_VPTR_BASETYPE (type
) = type
;
4643 do_cleanups (back_to
);
4648 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4650 struct objfile
*objfile
= cu
->objfile
;
4651 struct die_info
*child_die
= die
->child
;
4652 struct type
*this_type
;
4654 this_type
= get_die_type (die
, cu
);
4655 if (this_type
== NULL
)
4656 this_type
= read_structure_type (die
, cu
);
4658 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4659 snapshots) has been known to create a die giving a declaration
4660 for a class that has, as a child, a die giving a definition for a
4661 nested class. So we have to process our children even if the
4662 current die is a declaration. Normally, of course, a declaration
4663 won't have any children at all. */
4665 while (child_die
!= NULL
&& child_die
->tag
)
4667 if (child_die
->tag
== DW_TAG_member
4668 || child_die
->tag
== DW_TAG_variable
4669 || child_die
->tag
== DW_TAG_inheritance
)
4674 process_die (child_die
, cu
);
4676 child_die
= sibling_die (child_die
);
4679 /* Do not consider external references. According to the DWARF standard,
4680 these DIEs are identified by the fact that they have no byte_size
4681 attribute, and a declaration attribute. */
4682 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
4683 || !die_is_declaration (die
, cu
))
4684 new_symbol (die
, this_type
, cu
);
4687 /* Given a DW_AT_enumeration_type die, set its type. We do not
4688 complete the type's fields yet, or create any symbols. */
4690 static struct type
*
4691 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4693 struct objfile
*objfile
= cu
->objfile
;
4695 struct attribute
*attr
;
4698 type
= alloc_type (objfile
);
4700 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
4701 name
= dwarf2_full_name (die
, cu
);
4703 TYPE_TAG_NAME (type
) = (char *) name
;
4705 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4708 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4712 TYPE_LENGTH (type
) = 0;
4715 /* The enumeration DIE can be incomplete. In Ada, any type can be
4716 declared as private in the package spec, and then defined only
4717 inside the package body. Such types are known as Taft Amendment
4718 Types. When another package uses such a type, an incomplete DIE
4719 may be generated by the compiler. */
4720 if (die_is_declaration (die
, cu
))
4721 TYPE_STUB (type
) = 1;
4723 return set_die_type (die
, type
, cu
);
4726 /* Determine the name of the type represented by DIE, which should be
4727 a named C++ or Java compound type. Return the name in question,
4728 allocated on the objfile obstack. */
4731 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
4733 const char *new_prefix
= NULL
;
4735 /* If we don't have namespace debug info, guess the name by trying
4736 to demangle the names of members, just like we did in
4737 guess_structure_name. */
4738 if (!processing_has_namespace_info
)
4740 struct die_info
*child
;
4742 for (child
= die
->child
;
4743 child
!= NULL
&& child
->tag
!= 0;
4744 child
= sibling_die (child
))
4746 if (child
->tag
== DW_TAG_subprogram
)
4749 = language_class_name_from_physname (cu
->language_defn
,
4753 if (phys_prefix
!= NULL
)
4756 = obsavestring (phys_prefix
, strlen (phys_prefix
),
4757 &cu
->objfile
->objfile_obstack
);
4758 xfree (phys_prefix
);
4765 if (new_prefix
== NULL
)
4766 new_prefix
= dwarf2_full_name (die
, cu
);
4771 /* Given a pointer to a die which begins an enumeration, process all
4772 the dies that define the members of the enumeration, and create the
4773 symbol for the enumeration type.
4775 NOTE: We reverse the order of the element list. */
4778 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4780 struct objfile
*objfile
= cu
->objfile
;
4781 struct die_info
*child_die
;
4782 struct field
*fields
;
4785 int unsigned_enum
= 1;
4787 struct type
*this_type
;
4791 this_type
= get_die_type (die
, cu
);
4792 if (this_type
== NULL
)
4793 this_type
= read_enumeration_type (die
, cu
);
4794 if (die
->child
!= NULL
)
4796 child_die
= die
->child
;
4797 while (child_die
&& child_die
->tag
)
4799 if (child_die
->tag
!= DW_TAG_enumerator
)
4801 process_die (child_die
, cu
);
4805 name
= dwarf2_name (child_die
, cu
);
4808 sym
= new_symbol (child_die
, this_type
, cu
);
4809 if (SYMBOL_VALUE (sym
) < 0)
4812 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4814 fields
= (struct field
*)
4816 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
4817 * sizeof (struct field
));
4820 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
4821 FIELD_TYPE (fields
[num_fields
]) = NULL
;
4822 SET_FIELD_BITPOS (fields
[num_fields
], SYMBOL_VALUE (sym
));
4823 FIELD_BITSIZE (fields
[num_fields
]) = 0;
4829 child_die
= sibling_die (child_die
);
4834 TYPE_NFIELDS (this_type
) = num_fields
;
4835 TYPE_FIELDS (this_type
) = (struct field
*)
4836 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
4837 memcpy (TYPE_FIELDS (this_type
), fields
,
4838 sizeof (struct field
) * num_fields
);
4842 TYPE_UNSIGNED (this_type
) = 1;
4845 new_symbol (die
, this_type
, cu
);
4848 /* Extract all information from a DW_TAG_array_type DIE and put it in
4849 the DIE's type field. For now, this only handles one dimensional
4852 static struct type
*
4853 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4855 struct objfile
*objfile
= cu
->objfile
;
4856 struct die_info
*child_die
;
4857 struct type
*type
= NULL
;
4858 struct type
*element_type
, *range_type
, *index_type
;
4859 struct type
**range_types
= NULL
;
4860 struct attribute
*attr
;
4862 struct cleanup
*back_to
;
4865 element_type
= die_type (die
, cu
);
4867 /* Irix 6.2 native cc creates array types without children for
4868 arrays with unspecified length. */
4869 if (die
->child
== NULL
)
4871 index_type
= objfile_type (objfile
)->builtin_int
;
4872 range_type
= create_range_type (NULL
, index_type
, 0, -1);
4873 type
= create_array_type (NULL
, element_type
, range_type
);
4874 return set_die_type (die
, type
, cu
);
4877 back_to
= make_cleanup (null_cleanup
, NULL
);
4878 child_die
= die
->child
;
4879 while (child_die
&& child_die
->tag
)
4881 if (child_die
->tag
== DW_TAG_subrange_type
)
4883 struct type
*child_type
= read_type_die (child_die
, cu
);
4884 if (child_type
!= NULL
)
4886 /* The range type was succesfully read. Save it for
4887 the array type creation. */
4888 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
4890 range_types
= (struct type
**)
4891 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
4892 * sizeof (struct type
*));
4894 make_cleanup (free_current_contents
, &range_types
);
4896 range_types
[ndim
++] = child_type
;
4899 child_die
= sibling_die (child_die
);
4902 /* Dwarf2 dimensions are output from left to right, create the
4903 necessary array types in backwards order. */
4905 type
= element_type
;
4907 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
4911 type
= create_array_type (NULL
, type
, range_types
[i
++]);
4916 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
4919 /* Understand Dwarf2 support for vector types (like they occur on
4920 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4921 array type. This is not part of the Dwarf2/3 standard yet, but a
4922 custom vendor extension. The main difference between a regular
4923 array and the vector variant is that vectors are passed by value
4925 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
4927 make_vector_type (type
);
4929 name
= dwarf2_name (die
, cu
);
4931 TYPE_NAME (type
) = name
;
4933 do_cleanups (back_to
);
4935 /* Install the type in the die. */
4936 return set_die_type (die
, type
, cu
);
4939 static enum dwarf_array_dim_ordering
4940 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
4942 struct attribute
*attr
;
4944 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
4946 if (attr
) return DW_SND (attr
);
4949 GNU F77 is a special case, as at 08/2004 array type info is the
4950 opposite order to the dwarf2 specification, but data is still
4951 laid out as per normal fortran.
4953 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4957 if (cu
->language
== language_fortran
&&
4958 cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
4960 return DW_ORD_row_major
;
4963 switch (cu
->language_defn
->la_array_ordering
)
4965 case array_column_major
:
4966 return DW_ORD_col_major
;
4967 case array_row_major
:
4969 return DW_ORD_row_major
;
4973 /* Extract all information from a DW_TAG_set_type DIE and put it in
4974 the DIE's type field. */
4976 static struct type
*
4977 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4979 struct type
*set_type
= create_set_type (NULL
, die_type (die
, cu
));
4981 return set_die_type (die
, set_type
, cu
);
4984 /* First cut: install each common block member as a global variable. */
4987 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
4989 struct die_info
*child_die
;
4990 struct attribute
*attr
;
4992 CORE_ADDR base
= (CORE_ADDR
) 0;
4994 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
4997 /* Support the .debug_loc offsets */
4998 if (attr_form_is_block (attr
))
5000 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
5002 else if (attr_form_is_section_offset (attr
))
5004 dwarf2_complex_location_expr_complaint ();
5008 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5009 "common block member");
5012 if (die
->child
!= NULL
)
5014 child_die
= die
->child
;
5015 while (child_die
&& child_die
->tag
)
5017 sym
= new_symbol (child_die
, NULL
, cu
);
5018 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
5021 SYMBOL_VALUE_ADDRESS (sym
) =
5022 base
+ decode_locdesc (DW_BLOCK (attr
), cu
);
5023 add_symbol_to_list (sym
, &global_symbols
);
5025 child_die
= sibling_die (child_die
);
5030 /* Create a type for a C++ namespace. */
5032 static struct type
*
5033 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5035 struct objfile
*objfile
= cu
->objfile
;
5036 const char *previous_prefix
, *name
;
5040 /* For extensions, reuse the type of the original namespace. */
5041 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
5043 struct die_info
*ext_die
;
5044 struct dwarf2_cu
*ext_cu
= cu
;
5045 ext_die
= dwarf2_extension (die
, &ext_cu
);
5046 type
= read_type_die (ext_die
, ext_cu
);
5047 return set_die_type (die
, type
, cu
);
5050 name
= namespace_name (die
, &is_anonymous
, cu
);
5052 /* Now build the name of the current namespace. */
5054 previous_prefix
= determine_prefix (die
, cu
);
5055 if (previous_prefix
[0] != '\0')
5056 name
= typename_concat (&objfile
->objfile_obstack
,
5057 previous_prefix
, name
, cu
);
5059 /* Create the type. */
5060 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0, NULL
,
5062 TYPE_NAME (type
) = (char *) name
;
5063 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
5065 set_die_type (die
, type
, cu
);
5070 /* Read a C++ namespace. */
5073 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
5075 struct objfile
*objfile
= cu
->objfile
;
5079 /* Add a symbol associated to this if we haven't seen the namespace
5080 before. Also, add a using directive if it's an anonymous
5083 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
5087 type
= read_type_die (die
, cu
);
5088 new_symbol (die
, type
, cu
);
5090 name
= namespace_name (die
, &is_anonymous
, cu
);
5093 const char *previous_prefix
= determine_prefix (die
, cu
);
5094 cp_add_using_directive (previous_prefix
, TYPE_NAME (type
));
5098 if (die
->child
!= NULL
)
5100 struct die_info
*child_die
= die
->child
;
5102 while (child_die
&& child_die
->tag
)
5104 process_die (child_die
, cu
);
5105 child_die
= sibling_die (child_die
);
5110 /* Read a Fortran module. */
5113 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
5115 struct die_info
*child_die
= die
->child
;
5117 /* FIXME: Support the separate Fortran module namespaces. */
5119 while (child_die
&& child_die
->tag
)
5121 process_die (child_die
, cu
);
5122 child_die
= sibling_die (child_die
);
5126 /* Return the name of the namespace represented by DIE. Set
5127 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
5131 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
5133 struct die_info
*current_die
;
5134 const char *name
= NULL
;
5136 /* Loop through the extensions until we find a name. */
5138 for (current_die
= die
;
5139 current_die
!= NULL
;
5140 current_die
= dwarf2_extension (die
, &cu
))
5142 name
= dwarf2_name (current_die
, cu
);
5147 /* Is it an anonymous namespace? */
5149 *is_anonymous
= (name
== NULL
);
5151 name
= "(anonymous namespace)";
5156 /* Extract all information from a DW_TAG_pointer_type DIE and add to
5157 the user defined type vector. */
5159 static struct type
*
5160 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5162 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5163 struct comp_unit_head
*cu_header
= &cu
->header
;
5165 struct attribute
*attr_byte_size
;
5166 struct attribute
*attr_address_class
;
5167 int byte_size
, addr_class
;
5169 type
= lookup_pointer_type (die_type (die
, cu
));
5171 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5173 byte_size
= DW_UNSND (attr_byte_size
);
5175 byte_size
= cu_header
->addr_size
;
5177 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
5178 if (attr_address_class
)
5179 addr_class
= DW_UNSND (attr_address_class
);
5181 addr_class
= DW_ADDR_none
;
5183 /* If the pointer size or address class is different than the
5184 default, create a type variant marked as such and set the
5185 length accordingly. */
5186 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
5188 if (gdbarch_address_class_type_flags_p (gdbarch
))
5192 type_flags
= gdbarch_address_class_type_flags
5193 (gdbarch
, byte_size
, addr_class
);
5194 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
5196 type
= make_type_with_address_space (type
, type_flags
);
5198 else if (TYPE_LENGTH (type
) != byte_size
)
5200 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
5203 /* Should we also complain about unhandled address classes? */
5207 TYPE_LENGTH (type
) = byte_size
;
5208 return set_die_type (die
, type
, cu
);
5211 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
5212 the user defined type vector. */
5214 static struct type
*
5215 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5217 struct objfile
*objfile
= cu
->objfile
;
5219 struct type
*to_type
;
5220 struct type
*domain
;
5222 to_type
= die_type (die
, cu
);
5223 domain
= die_containing_type (die
, cu
);
5225 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
5226 type
= lookup_methodptr_type (to_type
);
5228 type
= lookup_memberptr_type (to_type
, domain
);
5230 return set_die_type (die
, type
, cu
);
5233 /* Extract all information from a DW_TAG_reference_type DIE and add to
5234 the user defined type vector. */
5236 static struct type
*
5237 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5239 struct comp_unit_head
*cu_header
= &cu
->header
;
5241 struct attribute
*attr
;
5243 type
= lookup_reference_type (die_type (die
, cu
));
5244 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5247 TYPE_LENGTH (type
) = DW_UNSND (attr
);
5251 TYPE_LENGTH (type
) = cu_header
->addr_size
;
5253 return set_die_type (die
, type
, cu
);
5256 static struct type
*
5257 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5259 struct type
*base_type
, *cv_type
;
5261 base_type
= die_type (die
, cu
);
5262 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
5263 return set_die_type (die
, cv_type
, cu
);
5266 static struct type
*
5267 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5269 struct type
*base_type
, *cv_type
;
5271 base_type
= die_type (die
, cu
);
5272 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
5273 return set_die_type (die
, cv_type
, cu
);
5276 /* Extract all information from a DW_TAG_string_type DIE and add to
5277 the user defined type vector. It isn't really a user defined type,
5278 but it behaves like one, with other DIE's using an AT_user_def_type
5279 attribute to reference it. */
5281 static struct type
*
5282 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5284 struct objfile
*objfile
= cu
->objfile
;
5285 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5286 struct type
*type
, *range_type
, *index_type
, *char_type
;
5287 struct attribute
*attr
;
5288 unsigned int length
;
5290 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
5293 length
= DW_UNSND (attr
);
5297 /* check for the DW_AT_byte_size attribute */
5298 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5301 length
= DW_UNSND (attr
);
5309 index_type
= objfile_type (objfile
)->builtin_int
;
5310 range_type
= create_range_type (NULL
, index_type
, 1, length
);
5311 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
5312 type
= create_string_type (NULL
, char_type
, range_type
);
5314 return set_die_type (die
, type
, cu
);
5317 /* Handle DIES due to C code like:
5321 int (*funcp)(int a, long l);
5325 ('funcp' generates a DW_TAG_subroutine_type DIE)
5328 static struct type
*
5329 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5331 struct type
*type
; /* Type that this function returns */
5332 struct type
*ftype
; /* Function that returns above type */
5333 struct attribute
*attr
;
5335 type
= die_type (die
, cu
);
5336 ftype
= lookup_function_type (type
);
5338 /* All functions in C++, Pascal and Java have prototypes. */
5339 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
5340 if ((attr
&& (DW_UNSND (attr
) != 0))
5341 || cu
->language
== language_cplus
5342 || cu
->language
== language_java
5343 || cu
->language
== language_pascal
)
5344 TYPE_PROTOTYPED (ftype
) = 1;
5346 /* Store the calling convention in the type if it's available in
5347 the subroutine die. Otherwise set the calling convention to
5348 the default value DW_CC_normal. */
5349 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
5350 TYPE_CALLING_CONVENTION (ftype
) = attr
? DW_UNSND (attr
) : DW_CC_normal
;
5352 if (die
->child
!= NULL
)
5354 struct die_info
*child_die
;
5358 /* Count the number of parameters.
5359 FIXME: GDB currently ignores vararg functions, but knows about
5360 vararg member functions. */
5361 child_die
= die
->child
;
5362 while (child_die
&& child_die
->tag
)
5364 if (child_die
->tag
== DW_TAG_formal_parameter
)
5366 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
5367 TYPE_VARARGS (ftype
) = 1;
5368 child_die
= sibling_die (child_die
);
5371 /* Allocate storage for parameters and fill them in. */
5372 TYPE_NFIELDS (ftype
) = nparams
;
5373 TYPE_FIELDS (ftype
) = (struct field
*)
5374 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
5376 child_die
= die
->child
;
5377 while (child_die
&& child_die
->tag
)
5379 if (child_die
->tag
== DW_TAG_formal_parameter
)
5381 /* Dwarf2 has no clean way to discern C++ static and non-static
5382 member functions. G++ helps GDB by marking the first
5383 parameter for non-static member functions (which is the
5384 this pointer) as artificial. We pass this information
5385 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
5386 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
5388 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
5390 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
5391 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
5394 child_die
= sibling_die (child_die
);
5398 return set_die_type (die
, ftype
, cu
);
5401 static struct type
*
5402 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
5404 struct objfile
*objfile
= cu
->objfile
;
5405 struct attribute
*attr
;
5406 const char *name
= NULL
;
5407 struct type
*this_type
;
5409 name
= dwarf2_full_name (die
, cu
);
5410 this_type
= init_type (TYPE_CODE_TYPEDEF
, 0,
5411 TYPE_FLAG_TARGET_STUB
, NULL
, objfile
);
5412 TYPE_NAME (this_type
) = (char *) name
;
5413 set_die_type (die
, this_type
, cu
);
5414 TYPE_TARGET_TYPE (this_type
) = die_type (die
, cu
);
5418 /* Find a representation of a given base type and install
5419 it in the TYPE field of the die. */
5421 static struct type
*
5422 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5424 struct objfile
*objfile
= cu
->objfile
;
5426 struct attribute
*attr
;
5427 int encoding
= 0, size
= 0;
5429 enum type_code code
= TYPE_CODE_INT
;
5431 struct type
*target_type
= NULL
;
5433 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
5436 encoding
= DW_UNSND (attr
);
5438 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5441 size
= DW_UNSND (attr
);
5443 name
= dwarf2_name (die
, cu
);
5446 complaint (&symfile_complaints
,
5447 _("DW_AT_name missing from DW_TAG_base_type"));
5452 case DW_ATE_address
:
5453 /* Turn DW_ATE_address into a void * pointer. */
5454 code
= TYPE_CODE_PTR
;
5455 type_flags
|= TYPE_FLAG_UNSIGNED
;
5456 target_type
= init_type (TYPE_CODE_VOID
, 1, 0, NULL
, objfile
);
5458 case DW_ATE_boolean
:
5459 code
= TYPE_CODE_BOOL
;
5460 type_flags
|= TYPE_FLAG_UNSIGNED
;
5462 case DW_ATE_complex_float
:
5463 code
= TYPE_CODE_COMPLEX
;
5464 target_type
= init_type (TYPE_CODE_FLT
, size
/ 2, 0, NULL
, objfile
);
5466 case DW_ATE_decimal_float
:
5467 code
= TYPE_CODE_DECFLOAT
;
5470 code
= TYPE_CODE_FLT
;
5474 case DW_ATE_unsigned
:
5475 type_flags
|= TYPE_FLAG_UNSIGNED
;
5477 case DW_ATE_signed_char
:
5478 if (cu
->language
== language_ada
|| cu
->language
== language_m2
5479 || cu
->language
== language_pascal
)
5480 code
= TYPE_CODE_CHAR
;
5482 case DW_ATE_unsigned_char
:
5483 if (cu
->language
== language_ada
|| cu
->language
== language_m2
5484 || cu
->language
== language_pascal
)
5485 code
= TYPE_CODE_CHAR
;
5486 type_flags
|= TYPE_FLAG_UNSIGNED
;
5489 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
5490 dwarf_type_encoding_name (encoding
));
5494 type
= init_type (code
, size
, type_flags
, NULL
, objfile
);
5495 TYPE_NAME (type
) = name
;
5496 TYPE_TARGET_TYPE (type
) = target_type
;
5498 if (name
&& strcmp (name
, "char") == 0)
5499 TYPE_NOSIGN (type
) = 1;
5501 return set_die_type (die
, type
, cu
);
5504 /* Read the given DW_AT_subrange DIE. */
5506 static struct type
*
5507 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5509 struct gdbarch
*gdbarch
= get_objfile_arch (cu
->objfile
);
5510 struct type
*base_type
;
5511 struct type
*range_type
;
5512 struct attribute
*attr
;
5517 base_type
= die_type (die
, cu
);
5518 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
5520 complaint (&symfile_complaints
,
5521 _("DW_AT_type missing from DW_TAG_subrange_type"));
5523 = init_type (TYPE_CODE_INT
, gdbarch_addr_bit (gdbarch
) / 8,
5524 0, NULL
, cu
->objfile
);
5527 if (cu
->language
== language_fortran
)
5529 /* FORTRAN implies a lower bound of 1, if not given. */
5533 /* FIXME: For variable sized arrays either of these could be
5534 a variable rather than a constant value. We'll allow it,
5535 but we don't know how to handle it. */
5536 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
5538 low
= dwarf2_get_attr_constant_value (attr
, 0);
5540 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
5543 if (attr
->form
== DW_FORM_block1
)
5545 /* GCC encodes arrays with unspecified or dynamic length
5546 with a DW_FORM_block1 attribute.
5547 FIXME: GDB does not yet know how to handle dynamic
5548 arrays properly, treat them as arrays with unspecified
5551 FIXME: jimb/2003-09-22: GDB does not really know
5552 how to handle arrays of unspecified length
5553 either; we just represent them as zero-length
5554 arrays. Choose an appropriate upper bound given
5555 the lower bound we've computed above. */
5559 high
= dwarf2_get_attr_constant_value (attr
, 1);
5562 range_type
= create_range_type (NULL
, base_type
, low
, high
);
5564 name
= dwarf2_name (die
, cu
);
5566 TYPE_NAME (range_type
) = name
;
5568 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
5570 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
5572 return set_die_type (die
, range_type
, cu
);
5575 static struct type
*
5576 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
5580 /* For now, we only support the C meaning of an unspecified type: void. */
5582 type
= init_type (TYPE_CODE_VOID
, 0, 0, NULL
, cu
->objfile
);
5583 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
5585 return set_die_type (die
, type
, cu
);
5588 /* Trivial hash function for die_info: the hash value of a DIE
5589 is its offset in .debug_info for this objfile. */
5592 die_hash (const void *item
)
5594 const struct die_info
*die
= item
;
5598 /* Trivial comparison function for die_info structures: two DIEs
5599 are equal if they have the same offset. */
5602 die_eq (const void *item_lhs
, const void *item_rhs
)
5604 const struct die_info
*die_lhs
= item_lhs
;
5605 const struct die_info
*die_rhs
= item_rhs
;
5606 return die_lhs
->offset
== die_rhs
->offset
;
5609 /* Read a whole compilation unit into a linked list of dies. */
5611 static struct die_info
*
5612 read_comp_unit (gdb_byte
*info_ptr
, bfd
*abfd
, struct dwarf2_cu
*cu
)
5615 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5619 &cu
->comp_unit_obstack
,
5620 hashtab_obstack_allocate
,
5621 dummy_obstack_deallocate
);
5623 return read_die_and_children (info_ptr
, abfd
, cu
, &info_ptr
, NULL
);
5626 /* Main entry point for reading a DIE and all children.
5627 Read the DIE and dump it if requested. */
5629 static struct die_info
*
5630 read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
5631 struct dwarf2_cu
*cu
,
5632 gdb_byte
**new_info_ptr
,
5633 struct die_info
*parent
)
5635 struct die_info
*result
= read_die_and_children_1 (info_ptr
, abfd
, cu
,
5636 new_info_ptr
, parent
);
5638 if (dwarf2_die_debug
)
5640 fprintf_unfiltered (gdb_stdlog
, "Read die from .debug_info:\n");
5641 dump_die (result
, dwarf2_die_debug
);
5647 /* Read a single die and all its descendents. Set the die's sibling
5648 field to NULL; set other fields in the die correctly, and set all
5649 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5650 location of the info_ptr after reading all of those dies. PARENT
5651 is the parent of the die in question. */
5653 static struct die_info
*
5654 read_die_and_children_1 (gdb_byte
*info_ptr
, bfd
*abfd
,
5655 struct dwarf2_cu
*cu
,
5656 gdb_byte
**new_info_ptr
,
5657 struct die_info
*parent
)
5659 struct die_info
*die
;
5663 cur_ptr
= read_full_die (&die
, abfd
, info_ptr
, cu
, &has_children
);
5666 *new_info_ptr
= cur_ptr
;
5669 store_in_ref_table (die
, cu
);
5673 die
->child
= read_die_and_siblings (cur_ptr
, abfd
, cu
,
5679 *new_info_ptr
= cur_ptr
;
5682 die
->sibling
= NULL
;
5683 die
->parent
= parent
;
5687 /* Read a die, all of its descendents, and all of its siblings; set
5688 all of the fields of all of the dies correctly. Arguments are as
5689 in read_die_and_children. */
5691 static struct die_info
*
5692 read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
5693 struct dwarf2_cu
*cu
,
5694 gdb_byte
**new_info_ptr
,
5695 struct die_info
*parent
)
5697 struct die_info
*first_die
, *last_sibling
;
5701 first_die
= last_sibling
= NULL
;
5705 struct die_info
*die
5706 = read_die_and_children_1 (cur_ptr
, abfd
, cu
, &cur_ptr
, parent
);
5710 *new_info_ptr
= cur_ptr
;
5717 last_sibling
->sibling
= die
;
5723 /* In DWARF version 2, the description of the debugging information is
5724 stored in a separate .debug_abbrev section. Before we read any
5725 dies from a section we read in all abbreviations and install them
5726 in a hash table. This function also sets flags in CU describing
5727 the data found in the abbrev table. */
5730 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
5732 struct comp_unit_head
*cu_header
= &cu
->header
;
5733 gdb_byte
*abbrev_ptr
;
5734 struct abbrev_info
*cur_abbrev
;
5735 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
5736 unsigned int abbrev_form
, hash_number
;
5737 struct attr_abbrev
*cur_attrs
;
5738 unsigned int allocated_attrs
;
5740 /* Initialize dwarf2 abbrevs */
5741 obstack_init (&cu
->abbrev_obstack
);
5742 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
5744 * sizeof (struct abbrev_info
*)));
5745 memset (cu
->dwarf2_abbrevs
, 0,
5746 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
5748 abbrev_ptr
= dwarf2_per_objfile
->abbrev
.buffer
+ cu_header
->abbrev_offset
;
5749 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5750 abbrev_ptr
+= bytes_read
;
5752 allocated_attrs
= ATTR_ALLOC_CHUNK
;
5753 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
5755 /* loop until we reach an abbrev number of 0 */
5756 while (abbrev_number
)
5758 cur_abbrev
= dwarf_alloc_abbrev (cu
);
5760 /* read in abbrev header */
5761 cur_abbrev
->number
= abbrev_number
;
5762 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5763 abbrev_ptr
+= bytes_read
;
5764 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
5767 if (cur_abbrev
->tag
== DW_TAG_namespace
)
5768 cu
->has_namespace_info
= 1;
5770 /* now read in declarations */
5771 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5772 abbrev_ptr
+= bytes_read
;
5773 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5774 abbrev_ptr
+= bytes_read
;
5777 if (cur_abbrev
->num_attrs
== allocated_attrs
)
5779 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
5781 = xrealloc (cur_attrs
, (allocated_attrs
5782 * sizeof (struct attr_abbrev
)));
5785 /* Record whether this compilation unit might have
5786 inter-compilation-unit references. If we don't know what form
5787 this attribute will have, then it might potentially be a
5788 DW_FORM_ref_addr, so we conservatively expect inter-CU
5791 if (abbrev_form
== DW_FORM_ref_addr
5792 || abbrev_form
== DW_FORM_indirect
)
5793 cu
->has_form_ref_addr
= 1;
5795 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
5796 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
5797 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5798 abbrev_ptr
+= bytes_read
;
5799 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5800 abbrev_ptr
+= bytes_read
;
5803 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
5804 (cur_abbrev
->num_attrs
5805 * sizeof (struct attr_abbrev
)));
5806 memcpy (cur_abbrev
->attrs
, cur_attrs
,
5807 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
5809 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
5810 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
5811 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
5813 /* Get next abbreviation.
5814 Under Irix6 the abbreviations for a compilation unit are not
5815 always properly terminated with an abbrev number of 0.
5816 Exit loop if we encounter an abbreviation which we have
5817 already read (which means we are about to read the abbreviations
5818 for the next compile unit) or if the end of the abbreviation
5819 table is reached. */
5820 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev
.buffer
)
5821 >= dwarf2_per_objfile
->abbrev
.size
)
5823 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5824 abbrev_ptr
+= bytes_read
;
5825 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
5832 /* Release the memory used by the abbrev table for a compilation unit. */
5835 dwarf2_free_abbrev_table (void *ptr_to_cu
)
5837 struct dwarf2_cu
*cu
= ptr_to_cu
;
5839 obstack_free (&cu
->abbrev_obstack
, NULL
);
5840 cu
->dwarf2_abbrevs
= NULL
;
5843 /* Lookup an abbrev_info structure in the abbrev hash table. */
5845 static struct abbrev_info
*
5846 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
5848 unsigned int hash_number
;
5849 struct abbrev_info
*abbrev
;
5851 hash_number
= number
% ABBREV_HASH_SIZE
;
5852 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
5856 if (abbrev
->number
== number
)
5859 abbrev
= abbrev
->next
;
5864 /* Returns nonzero if TAG represents a type that we might generate a partial
5868 is_type_tag_for_partial (int tag
)
5873 /* Some types that would be reasonable to generate partial symbols for,
5874 that we don't at present. */
5875 case DW_TAG_array_type
:
5876 case DW_TAG_file_type
:
5877 case DW_TAG_ptr_to_member_type
:
5878 case DW_TAG_set_type
:
5879 case DW_TAG_string_type
:
5880 case DW_TAG_subroutine_type
:
5882 case DW_TAG_base_type
:
5883 case DW_TAG_class_type
:
5884 case DW_TAG_interface_type
:
5885 case DW_TAG_enumeration_type
:
5886 case DW_TAG_structure_type
:
5887 case DW_TAG_subrange_type
:
5888 case DW_TAG_typedef
:
5889 case DW_TAG_union_type
:
5896 /* Load all DIEs that are interesting for partial symbols into memory. */
5898 static struct partial_die_info
*
5899 load_partial_dies (bfd
*abfd
, gdb_byte
*info_ptr
, int building_psymtab
,
5900 struct dwarf2_cu
*cu
)
5902 struct partial_die_info
*part_die
;
5903 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
5904 struct abbrev_info
*abbrev
;
5905 unsigned int bytes_read
;
5906 unsigned int load_all
= 0;
5908 int nesting_level
= 1;
5913 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
5917 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5921 &cu
->comp_unit_obstack
,
5922 hashtab_obstack_allocate
,
5923 dummy_obstack_deallocate
);
5925 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5926 sizeof (struct partial_die_info
));
5930 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5932 /* A NULL abbrev means the end of a series of children. */
5935 if (--nesting_level
== 0)
5937 /* PART_DIE was probably the last thing allocated on the
5938 comp_unit_obstack, so we could call obstack_free
5939 here. We don't do that because the waste is small,
5940 and will be cleaned up when we're done with this
5941 compilation unit. This way, we're also more robust
5942 against other users of the comp_unit_obstack. */
5945 info_ptr
+= bytes_read
;
5946 last_die
= parent_die
;
5947 parent_die
= parent_die
->die_parent
;
5951 /* Check whether this DIE is interesting enough to save. Normally
5952 we would not be interested in members here, but there may be
5953 later variables referencing them via DW_AT_specification (for
5956 && !is_type_tag_for_partial (abbrev
->tag
)
5957 && abbrev
->tag
!= DW_TAG_enumerator
5958 && abbrev
->tag
!= DW_TAG_subprogram
5959 && abbrev
->tag
!= DW_TAG_lexical_block
5960 && abbrev
->tag
!= DW_TAG_variable
5961 && abbrev
->tag
!= DW_TAG_namespace
5962 && abbrev
->tag
!= DW_TAG_member
)
5964 /* Otherwise we skip to the next sibling, if any. */
5965 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
5969 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
,
5970 abfd
, info_ptr
, cu
);
5972 /* This two-pass algorithm for processing partial symbols has a
5973 high cost in cache pressure. Thus, handle some simple cases
5974 here which cover the majority of C partial symbols. DIEs
5975 which neither have specification tags in them, nor could have
5976 specification tags elsewhere pointing at them, can simply be
5977 processed and discarded.
5979 This segment is also optional; scan_partial_symbols and
5980 add_partial_symbol will handle these DIEs if we chain
5981 them in normally. When compilers which do not emit large
5982 quantities of duplicate debug information are more common,
5983 this code can probably be removed. */
5985 /* Any complete simple types at the top level (pretty much all
5986 of them, for a language without namespaces), can be processed
5988 if (parent_die
== NULL
5989 && part_die
->has_specification
== 0
5990 && part_die
->is_declaration
== 0
5991 && (part_die
->tag
== DW_TAG_typedef
5992 || part_die
->tag
== DW_TAG_base_type
5993 || part_die
->tag
== DW_TAG_subrange_type
))
5995 if (building_psymtab
&& part_die
->name
!= NULL
)
5996 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5997 VAR_DOMAIN
, LOC_TYPEDEF
,
5998 &cu
->objfile
->static_psymbols
,
5999 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6000 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
6004 /* If we're at the second level, and we're an enumerator, and
6005 our parent has no specification (meaning possibly lives in a
6006 namespace elsewhere), then we can add the partial symbol now
6007 instead of queueing it. */
6008 if (part_die
->tag
== DW_TAG_enumerator
6009 && parent_die
!= NULL
6010 && parent_die
->die_parent
== NULL
6011 && parent_die
->tag
== DW_TAG_enumeration_type
6012 && parent_die
->has_specification
== 0)
6014 if (part_die
->name
== NULL
)
6015 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
6016 else if (building_psymtab
)
6017 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
6018 VAR_DOMAIN
, LOC_CONST
,
6019 (cu
->language
== language_cplus
6020 || cu
->language
== language_java
)
6021 ? &cu
->objfile
->global_psymbols
6022 : &cu
->objfile
->static_psymbols
,
6023 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
6025 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
6029 /* We'll save this DIE so link it in. */
6030 part_die
->die_parent
= parent_die
;
6031 part_die
->die_sibling
= NULL
;
6032 part_die
->die_child
= NULL
;
6034 if (last_die
&& last_die
== parent_die
)
6035 last_die
->die_child
= part_die
;
6037 last_die
->die_sibling
= part_die
;
6039 last_die
= part_die
;
6041 if (first_die
== NULL
)
6042 first_die
= part_die
;
6044 /* Maybe add the DIE to the hash table. Not all DIEs that we
6045 find interesting need to be in the hash table, because we
6046 also have the parent/sibling/child chains; only those that we
6047 might refer to by offset later during partial symbol reading.
6049 For now this means things that might have be the target of a
6050 DW_AT_specification, DW_AT_abstract_origin, or
6051 DW_AT_extension. DW_AT_extension will refer only to
6052 namespaces; DW_AT_abstract_origin refers to functions (and
6053 many things under the function DIE, but we do not recurse
6054 into function DIEs during partial symbol reading) and
6055 possibly variables as well; DW_AT_specification refers to
6056 declarations. Declarations ought to have the DW_AT_declaration
6057 flag. It happens that GCC forgets to put it in sometimes, but
6058 only for functions, not for types.
6060 Adding more things than necessary to the hash table is harmless
6061 except for the performance cost. Adding too few will result in
6062 wasted time in find_partial_die, when we reread the compilation
6063 unit with load_all_dies set. */
6066 || abbrev
->tag
== DW_TAG_subprogram
6067 || abbrev
->tag
== DW_TAG_variable
6068 || abbrev
->tag
== DW_TAG_namespace
6069 || part_die
->is_declaration
)
6073 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
6074 part_die
->offset
, INSERT
);
6078 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
6079 sizeof (struct partial_die_info
));
6081 /* For some DIEs we want to follow their children (if any). For C
6082 we have no reason to follow the children of structures; for other
6083 languages we have to, both so that we can get at method physnames
6084 to infer fully qualified class names, and for DW_AT_specification.
6086 For Ada, we need to scan the children of subprograms and lexical
6087 blocks as well because Ada allows the definition of nested
6088 entities that could be interesting for the debugger, such as
6089 nested subprograms for instance. */
6090 if (last_die
->has_children
6092 || last_die
->tag
== DW_TAG_namespace
6093 || last_die
->tag
== DW_TAG_enumeration_type
6094 || (cu
->language
!= language_c
6095 && (last_die
->tag
== DW_TAG_class_type
6096 || last_die
->tag
== DW_TAG_interface_type
6097 || last_die
->tag
== DW_TAG_structure_type
6098 || last_die
->tag
== DW_TAG_union_type
))
6099 || (cu
->language
== language_ada
6100 && (last_die
->tag
== DW_TAG_subprogram
6101 || last_die
->tag
== DW_TAG_lexical_block
))))
6104 parent_die
= last_die
;
6108 /* Otherwise we skip to the next sibling, if any. */
6109 info_ptr
= locate_pdi_sibling (last_die
, info_ptr
, abfd
, cu
);
6111 /* Back to the top, do it again. */
6115 /* Read a minimal amount of information into the minimal die structure. */
6118 read_partial_die (struct partial_die_info
*part_die
,
6119 struct abbrev_info
*abbrev
,
6120 unsigned int abbrev_len
, bfd
*abfd
,
6121 gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6123 unsigned int bytes_read
, i
;
6124 struct attribute attr
;
6125 int has_low_pc_attr
= 0;
6126 int has_high_pc_attr
= 0;
6127 CORE_ADDR base_address
= 0;
6131 base_address_low_pc
,
6132 /* Overrides BASE_ADDRESS_LOW_PC. */
6133 base_address_entry_pc
6135 base_address_type
= base_address_none
;
6137 memset (part_die
, 0, sizeof (struct partial_die_info
));
6139 part_die
->offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
6141 info_ptr
+= abbrev_len
;
6146 part_die
->tag
= abbrev
->tag
;
6147 part_die
->has_children
= abbrev
->has_children
;
6149 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6151 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
6153 /* Store the data if it is of an attribute we want to keep in a
6154 partial symbol table. */
6158 switch (part_die
->tag
)
6160 case DW_TAG_compile_unit
:
6161 /* Compilation units have a DW_AT_name that is a filename, not
6162 a source language identifier. */
6163 case DW_TAG_enumeration_type
:
6164 case DW_TAG_enumerator
:
6165 /* These tags always have simple identifiers already; no need
6166 to canonicalize them. */
6167 part_die
->name
= DW_STRING (&attr
);
6171 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
6172 &cu
->comp_unit_obstack
);
6176 case DW_AT_comp_dir
:
6177 if (part_die
->dirname
== NULL
)
6178 part_die
->dirname
= DW_STRING (&attr
);
6180 case DW_AT_MIPS_linkage_name
:
6181 part_die
->name
= DW_STRING (&attr
);
6184 has_low_pc_attr
= 1;
6185 part_die
->lowpc
= DW_ADDR (&attr
);
6186 if (part_die
->tag
== DW_TAG_compile_unit
6187 && base_address_type
< base_address_low_pc
)
6189 base_address
= DW_ADDR (&attr
);
6190 base_address_type
= base_address_low_pc
;
6194 has_high_pc_attr
= 1;
6195 part_die
->highpc
= DW_ADDR (&attr
);
6197 case DW_AT_entry_pc
:
6198 if (part_die
->tag
== DW_TAG_compile_unit
6199 && base_address_type
< base_address_entry_pc
)
6201 base_address
= DW_ADDR (&attr
);
6202 base_address_type
= base_address_entry_pc
;
6206 if (part_die
->tag
== DW_TAG_compile_unit
)
6208 cu
->ranges_offset
= DW_UNSND (&attr
);
6209 cu
->has_ranges_offset
= 1;
6212 case DW_AT_location
:
6213 /* Support the .debug_loc offsets */
6214 if (attr_form_is_block (&attr
))
6216 part_die
->locdesc
= DW_BLOCK (&attr
);
6218 else if (attr_form_is_section_offset (&attr
))
6220 dwarf2_complex_location_expr_complaint ();
6224 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
6225 "partial symbol information");
6228 case DW_AT_language
:
6229 part_die
->language
= DW_UNSND (&attr
);
6231 case DW_AT_external
:
6232 part_die
->is_external
= DW_UNSND (&attr
);
6234 case DW_AT_declaration
:
6235 part_die
->is_declaration
= DW_UNSND (&attr
);
6238 part_die
->has_type
= 1;
6240 case DW_AT_abstract_origin
:
6241 case DW_AT_specification
:
6242 case DW_AT_extension
:
6243 part_die
->has_specification
= 1;
6244 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
);
6247 /* Ignore absolute siblings, they might point outside of
6248 the current compile unit. */
6249 if (attr
.form
== DW_FORM_ref_addr
)
6250 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
6252 part_die
->sibling
= dwarf2_per_objfile
->info
.buffer
6253 + dwarf2_get_ref_die_offset (&attr
);
6255 case DW_AT_stmt_list
:
6256 part_die
->has_stmt_list
= 1;
6257 part_die
->line_offset
= DW_UNSND (&attr
);
6259 case DW_AT_byte_size
:
6260 part_die
->has_byte_size
= 1;
6262 case DW_AT_calling_convention
:
6263 /* DWARF doesn't provide a way to identify a program's source-level
6264 entry point. DW_AT_calling_convention attributes are only meant
6265 to describe functions' calling conventions.
6267 However, because it's a necessary piece of information in
6268 Fortran, and because DW_CC_program is the only piece of debugging
6269 information whose definition refers to a 'main program' at all,
6270 several compilers have begun marking Fortran main programs with
6271 DW_CC_program --- even when those functions use the standard
6272 calling conventions.
6274 So until DWARF specifies a way to provide this information and
6275 compilers pick up the new representation, we'll support this
6277 if (DW_UNSND (&attr
) == DW_CC_program
6278 && cu
->language
== language_fortran
)
6279 set_main_name (part_die
->name
);
6286 /* When using the GNU linker, .gnu.linkonce. sections are used to
6287 eliminate duplicate copies of functions and vtables and such.
6288 The linker will arbitrarily choose one and discard the others.
6289 The AT_*_pc values for such functions refer to local labels in
6290 these sections. If the section from that file was discarded, the
6291 labels are not in the output, so the relocs get a value of 0.
6292 If this is a discarded function, mark the pc bounds as invalid,
6293 so that GDB will ignore it. */
6294 if (has_low_pc_attr
&& has_high_pc_attr
6295 && part_die
->lowpc
< part_die
->highpc
6296 && (part_die
->lowpc
!= 0
6297 || dwarf2_per_objfile
->has_section_at_zero
))
6298 part_die
->has_pc_info
= 1;
6300 if (base_address_type
!= base_address_none
&& !cu
->base_known
)
6302 gdb_assert (part_die
->tag
== DW_TAG_compile_unit
);
6304 cu
->base_address
= base_address
;
6310 /* Find a cached partial DIE at OFFSET in CU. */
6312 static struct partial_die_info
*
6313 find_partial_die_in_comp_unit (unsigned int offset
, struct dwarf2_cu
*cu
)
6315 struct partial_die_info
*lookup_die
= NULL
;
6316 struct partial_die_info part_die
;
6318 part_die
.offset
= offset
;
6319 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
6324 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
6326 static struct partial_die_info
*
6327 find_partial_die (unsigned int offset
, struct dwarf2_cu
*cu
)
6329 struct dwarf2_per_cu_data
*per_cu
= NULL
;
6330 struct partial_die_info
*pd
= NULL
;
6332 if (offset_in_cu_p (&cu
->header
, offset
))
6334 pd
= find_partial_die_in_comp_unit (offset
, cu
);
6339 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
6341 if (per_cu
->cu
== NULL
)
6343 load_comp_unit (per_cu
, cu
->objfile
);
6344 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
6345 dwarf2_per_objfile
->read_in_chain
= per_cu
;
6348 per_cu
->cu
->last_used
= 0;
6349 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6351 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
6353 struct cleanup
*back_to
;
6354 struct partial_die_info comp_unit_die
;
6355 struct abbrev_info
*abbrev
;
6356 unsigned int bytes_read
;
6359 per_cu
->load_all_dies
= 1;
6361 /* Re-read the DIEs. */
6362 back_to
= make_cleanup (null_cleanup
, 0);
6363 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
6365 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
6366 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
6368 info_ptr
= (dwarf2_per_objfile
->info
.buffer
6369 + per_cu
->cu
->header
.offset
6370 + per_cu
->cu
->header
.first_die_offset
);
6371 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
6372 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
6373 per_cu
->cu
->objfile
->obfd
, info_ptr
,
6375 if (comp_unit_die
.has_children
)
6376 load_partial_dies (per_cu
->cu
->objfile
->obfd
, info_ptr
, 0, per_cu
->cu
);
6377 do_cleanups (back_to
);
6379 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
6383 internal_error (__FILE__
, __LINE__
,
6384 _("could not find partial DIE 0x%x in cache [from module %s]\n"),
6385 offset
, bfd_get_filename (cu
->objfile
->obfd
));
6389 /* Adjust PART_DIE before generating a symbol for it. This function
6390 may set the is_external flag or change the DIE's name. */
6393 fixup_partial_die (struct partial_die_info
*part_die
,
6394 struct dwarf2_cu
*cu
)
6396 /* If we found a reference attribute and the DIE has no name, try
6397 to find a name in the referred to DIE. */
6399 if (part_die
->name
== NULL
&& part_die
->has_specification
)
6401 struct partial_die_info
*spec_die
;
6403 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
6405 fixup_partial_die (spec_die
, cu
);
6409 part_die
->name
= spec_die
->name
;
6411 /* Copy DW_AT_external attribute if it is set. */
6412 if (spec_die
->is_external
)
6413 part_die
->is_external
= spec_die
->is_external
;
6417 /* Set default names for some unnamed DIEs. */
6418 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
6419 || part_die
->tag
== DW_TAG_class_type
))
6420 part_die
->name
= "(anonymous class)";
6422 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
6423 part_die
->name
= "(anonymous namespace)";
6425 if (part_die
->tag
== DW_TAG_structure_type
6426 || part_die
->tag
== DW_TAG_class_type
6427 || part_die
->tag
== DW_TAG_union_type
)
6428 guess_structure_name (part_die
, cu
);
6431 /* Read the die from the .debug_info section buffer. Set DIEP to
6432 point to a newly allocated die with its information, except for its
6433 child, sibling, and parent fields. Set HAS_CHILDREN to tell
6434 whether the die has children or not. */
6437 read_full_die (struct die_info
**diep
, bfd
*abfd
, gdb_byte
*info_ptr
,
6438 struct dwarf2_cu
*cu
, int *has_children
)
6440 unsigned int abbrev_number
, bytes_read
, i
, offset
;
6441 struct abbrev_info
*abbrev
;
6442 struct die_info
*die
;
6444 offset
= info_ptr
- dwarf2_per_objfile
->info
.buffer
;
6445 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6446 info_ptr
+= bytes_read
;
6454 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
6457 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
6459 bfd_get_filename (abfd
));
6461 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
);
6462 die
->offset
= offset
;
6463 die
->tag
= abbrev
->tag
;
6464 die
->abbrev
= abbrev_number
;
6466 die
->num_attrs
= abbrev
->num_attrs
;
6468 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
6469 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
6470 abfd
, info_ptr
, cu
);
6473 *has_children
= abbrev
->has_children
;
6477 /* Read an attribute value described by an attribute form. */
6480 read_attribute_value (struct attribute
*attr
, unsigned form
,
6481 bfd
*abfd
, gdb_byte
*info_ptr
,
6482 struct dwarf2_cu
*cu
)
6484 struct comp_unit_head
*cu_header
= &cu
->header
;
6485 unsigned int bytes_read
;
6486 struct dwarf_block
*blk
;
6492 case DW_FORM_ref_addr
:
6493 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
6494 info_ptr
+= bytes_read
;
6496 case DW_FORM_block2
:
6497 blk
= dwarf_alloc_block (cu
);
6498 blk
->size
= read_2_bytes (abfd
, info_ptr
);
6500 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6501 info_ptr
+= blk
->size
;
6502 DW_BLOCK (attr
) = blk
;
6504 case DW_FORM_block4
:
6505 blk
= dwarf_alloc_block (cu
);
6506 blk
->size
= read_4_bytes (abfd
, info_ptr
);
6508 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6509 info_ptr
+= blk
->size
;
6510 DW_BLOCK (attr
) = blk
;
6513 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
6517 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
6521 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
6524 case DW_FORM_string
:
6525 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
6526 info_ptr
+= bytes_read
;
6529 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
6531 info_ptr
+= bytes_read
;
6534 blk
= dwarf_alloc_block (cu
);
6535 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6536 info_ptr
+= bytes_read
;
6537 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6538 info_ptr
+= blk
->size
;
6539 DW_BLOCK (attr
) = blk
;
6541 case DW_FORM_block1
:
6542 blk
= dwarf_alloc_block (cu
);
6543 blk
->size
= read_1_byte (abfd
, info_ptr
);
6545 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
6546 info_ptr
+= blk
->size
;
6547 DW_BLOCK (attr
) = blk
;
6550 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6554 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
6558 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
6559 info_ptr
+= bytes_read
;
6562 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6563 info_ptr
+= bytes_read
;
6566 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
6570 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
6574 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
6578 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
6581 case DW_FORM_ref_udata
:
6582 DW_ADDR (attr
) = (cu
->header
.offset
6583 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
6584 info_ptr
+= bytes_read
;
6586 case DW_FORM_indirect
:
6587 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
6588 info_ptr
+= bytes_read
;
6589 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
6592 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
6593 dwarf_form_name (form
),
6594 bfd_get_filename (abfd
));
6597 /* We have seen instances where the compiler tried to emit a byte
6598 size attribute of -1 which ended up being encoded as an unsigned
6599 0xffffffff. Although 0xffffffff is technically a valid size value,
6600 an object of this size seems pretty unlikely so we can relatively
6601 safely treat these cases as if the size attribute was invalid and
6602 treat them as zero by default. */
6603 if (attr
->name
== DW_AT_byte_size
6604 && form
== DW_FORM_data4
6605 && DW_UNSND (attr
) >= 0xffffffff)
6608 (&symfile_complaints
,
6609 _("Suspicious DW_AT_byte_size value treated as zero instead of 0x%lx"),
6611 DW_UNSND (attr
) = 0;
6617 /* Read an attribute described by an abbreviated attribute. */
6620 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
6621 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
6623 attr
->name
= abbrev
->name
;
6624 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
6627 /* read dwarf information from a buffer */
6630 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
6632 return bfd_get_8 (abfd
, buf
);
6636 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
6638 return bfd_get_signed_8 (abfd
, buf
);
6642 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
6644 return bfd_get_16 (abfd
, buf
);
6648 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6650 return bfd_get_signed_16 (abfd
, buf
);
6654 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
6656 return bfd_get_32 (abfd
, buf
);
6660 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6662 return bfd_get_signed_32 (abfd
, buf
);
6665 static unsigned long
6666 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
6668 return bfd_get_64 (abfd
, buf
);
6672 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
6673 unsigned int *bytes_read
)
6675 struct comp_unit_head
*cu_header
= &cu
->header
;
6676 CORE_ADDR retval
= 0;
6678 if (cu_header
->signed_addr_p
)
6680 switch (cu_header
->addr_size
)
6683 retval
= bfd_get_signed_16 (abfd
, buf
);
6686 retval
= bfd_get_signed_32 (abfd
, buf
);
6689 retval
= bfd_get_signed_64 (abfd
, buf
);
6692 internal_error (__FILE__
, __LINE__
,
6693 _("read_address: bad switch, signed [in module %s]"),
6694 bfd_get_filename (abfd
));
6699 switch (cu_header
->addr_size
)
6702 retval
= bfd_get_16 (abfd
, buf
);
6705 retval
= bfd_get_32 (abfd
, buf
);
6708 retval
= bfd_get_64 (abfd
, buf
);
6711 internal_error (__FILE__
, __LINE__
,
6712 _("read_address: bad switch, unsigned [in module %s]"),
6713 bfd_get_filename (abfd
));
6717 *bytes_read
= cu_header
->addr_size
;
6721 /* Read the initial length from a section. The (draft) DWARF 3
6722 specification allows the initial length to take up either 4 bytes
6723 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6724 bytes describe the length and all offsets will be 8 bytes in length
6727 An older, non-standard 64-bit format is also handled by this
6728 function. The older format in question stores the initial length
6729 as an 8-byte quantity without an escape value. Lengths greater
6730 than 2^32 aren't very common which means that the initial 4 bytes
6731 is almost always zero. Since a length value of zero doesn't make
6732 sense for the 32-bit format, this initial zero can be considered to
6733 be an escape value which indicates the presence of the older 64-bit
6734 format. As written, the code can't detect (old format) lengths
6735 greater than 4GB. If it becomes necessary to handle lengths
6736 somewhat larger than 4GB, we could allow other small values (such
6737 as the non-sensical values of 1, 2, and 3) to also be used as
6738 escape values indicating the presence of the old format.
6740 The value returned via bytes_read should be used to increment the
6741 relevant pointer after calling read_initial_length().
6743 [ Note: read_initial_length() and read_offset() are based on the
6744 document entitled "DWARF Debugging Information Format", revision
6745 3, draft 8, dated November 19, 2001. This document was obtained
6748 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6750 This document is only a draft and is subject to change. (So beware.)
6752 Details regarding the older, non-standard 64-bit format were
6753 determined empirically by examining 64-bit ELF files produced by
6754 the SGI toolchain on an IRIX 6.5 machine.
6756 - Kevin, July 16, 2002
6760 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read
)
6762 LONGEST length
= bfd_get_32 (abfd
, buf
);
6764 if (length
== 0xffffffff)
6766 length
= bfd_get_64 (abfd
, buf
+ 4);
6769 else if (length
== 0)
6771 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6772 length
= bfd_get_64 (abfd
, buf
);
6783 /* Cover function for read_initial_length.
6784 Returns the length of the object at BUF, and stores the size of the
6785 initial length in *BYTES_READ and stores the size that offsets will be in
6787 If the initial length size is not equivalent to that specified in
6788 CU_HEADER then issue a complaint.
6789 This is useful when reading non-comp-unit headers. */
6792 read_checked_initial_length_and_offset (bfd
*abfd
, gdb_byte
*buf
,
6793 const struct comp_unit_head
*cu_header
,
6794 unsigned int *bytes_read
,
6795 unsigned int *offset_size
)
6797 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
6799 gdb_assert (cu_header
->initial_length_size
== 4
6800 || cu_header
->initial_length_size
== 8
6801 || cu_header
->initial_length_size
== 12);
6803 if (cu_header
->initial_length_size
!= *bytes_read
)
6804 complaint (&symfile_complaints
,
6805 _("intermixed 32-bit and 64-bit DWARF sections"));
6807 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
6811 /* Read an offset from the data stream. The size of the offset is
6812 given by cu_header->offset_size. */
6815 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
6816 unsigned int *bytes_read
)
6818 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
6819 *bytes_read
= cu_header
->offset_size
;
6823 /* Read an offset from the data stream. */
6826 read_offset_1 (bfd
*abfd
, gdb_byte
*buf
, unsigned int offset_size
)
6830 switch (offset_size
)
6833 retval
= bfd_get_32 (abfd
, buf
);
6836 retval
= bfd_get_64 (abfd
, buf
);
6839 internal_error (__FILE__
, __LINE__
,
6840 _("read_offset_1: bad switch [in module %s]"),
6841 bfd_get_filename (abfd
));
6848 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
6850 /* If the size of a host char is 8 bits, we can return a pointer
6851 to the buffer, otherwise we have to copy the data to a buffer
6852 allocated on the temporary obstack. */
6853 gdb_assert (HOST_CHAR_BIT
== 8);
6858 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6860 /* If the size of a host char is 8 bits, we can return a pointer
6861 to the string, otherwise we have to copy the string to a buffer
6862 allocated on the temporary obstack. */
6863 gdb_assert (HOST_CHAR_BIT
== 8);
6866 *bytes_read_ptr
= 1;
6869 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
6870 return (char *) buf
;
6874 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
6875 const struct comp_unit_head
*cu_header
,
6876 unsigned int *bytes_read_ptr
)
6878 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
6880 if (dwarf2_per_objfile
->str
.buffer
== NULL
)
6882 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6883 bfd_get_filename (abfd
));
6886 if (str_offset
>= dwarf2_per_objfile
->str
.size
)
6888 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6889 bfd_get_filename (abfd
));
6892 gdb_assert (HOST_CHAR_BIT
== 8);
6893 if (dwarf2_per_objfile
->str
.buffer
[str_offset
] == '\0')
6895 return (char *) (dwarf2_per_objfile
->str
.buffer
+ str_offset
);
6898 static unsigned long
6899 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6901 unsigned long result
;
6902 unsigned int num_read
;
6912 byte
= bfd_get_8 (abfd
, buf
);
6915 result
|= ((unsigned long)(byte
& 127) << shift
);
6916 if ((byte
& 128) == 0)
6922 *bytes_read_ptr
= num_read
;
6927 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6930 int i
, shift
, num_read
;
6939 byte
= bfd_get_8 (abfd
, buf
);
6942 result
|= ((long)(byte
& 127) << shift
);
6944 if ((byte
& 128) == 0)
6949 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
6950 result
|= -(((long)1) << shift
);
6951 *bytes_read_ptr
= num_read
;
6955 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6958 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
6964 byte
= bfd_get_8 (abfd
, buf
);
6966 if ((byte
& 128) == 0)
6972 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
6979 cu
->language
= language_c
;
6981 case DW_LANG_C_plus_plus
:
6982 cu
->language
= language_cplus
;
6984 case DW_LANG_Fortran77
:
6985 case DW_LANG_Fortran90
:
6986 case DW_LANG_Fortran95
:
6987 cu
->language
= language_fortran
;
6989 case DW_LANG_Mips_Assembler
:
6990 cu
->language
= language_asm
;
6993 cu
->language
= language_java
;
6997 cu
->language
= language_ada
;
6999 case DW_LANG_Modula2
:
7000 cu
->language
= language_m2
;
7002 case DW_LANG_Pascal83
:
7003 cu
->language
= language_pascal
;
7006 cu
->language
= language_objc
;
7008 case DW_LANG_Cobol74
:
7009 case DW_LANG_Cobol85
:
7011 cu
->language
= language_minimal
;
7014 cu
->language_defn
= language_def (cu
->language
);
7017 /* Return the named attribute or NULL if not there. */
7019 static struct attribute
*
7020 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
7023 struct attribute
*spec
= NULL
;
7025 for (i
= 0; i
< die
->num_attrs
; ++i
)
7027 if (die
->attrs
[i
].name
== name
)
7028 return &die
->attrs
[i
];
7029 if (die
->attrs
[i
].name
== DW_AT_specification
7030 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
7031 spec
= &die
->attrs
[i
];
7036 die
= follow_die_ref (die
, spec
, &cu
);
7037 return dwarf2_attr (die
, name
, cu
);
7043 /* Return non-zero iff the attribute NAME is defined for the given DIE,
7044 and holds a non-zero value. This function should only be used for
7045 DW_FORM_flag attributes. */
7048 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
7050 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
7052 return (attr
&& DW_UNSND (attr
));
7056 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
7058 /* A DIE is a declaration if it has a DW_AT_declaration attribute
7059 which value is non-zero. However, we have to be careful with
7060 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
7061 (via dwarf2_flag_true_p) follows this attribute. So we may
7062 end up accidently finding a declaration attribute that belongs
7063 to a different DIE referenced by the specification attribute,
7064 even though the given DIE does not have a declaration attribute. */
7065 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
7066 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
7069 /* Return the die giving the specification for DIE, if there is
7070 one. *SPEC_CU is the CU containing DIE on input, and the CU
7071 containing the return value on output. If there is no
7072 specification, but there is an abstract origin, that is
7075 static struct die_info
*
7076 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
7078 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
7081 if (spec_attr
== NULL
)
7082 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
7084 if (spec_attr
== NULL
)
7087 return follow_die_ref (die
, spec_attr
, spec_cu
);
7090 /* Free the line_header structure *LH, and any arrays and strings it
7093 free_line_header (struct line_header
*lh
)
7095 if (lh
->standard_opcode_lengths
)
7096 xfree (lh
->standard_opcode_lengths
);
7098 /* Remember that all the lh->file_names[i].name pointers are
7099 pointers into debug_line_buffer, and don't need to be freed. */
7101 xfree (lh
->file_names
);
7103 /* Similarly for the include directory names. */
7104 if (lh
->include_dirs
)
7105 xfree (lh
->include_dirs
);
7111 /* Add an entry to LH's include directory table. */
7113 add_include_dir (struct line_header
*lh
, char *include_dir
)
7115 /* Grow the array if necessary. */
7116 if (lh
->include_dirs_size
== 0)
7118 lh
->include_dirs_size
= 1; /* for testing */
7119 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
7120 * sizeof (*lh
->include_dirs
));
7122 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
7124 lh
->include_dirs_size
*= 2;
7125 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
7126 (lh
->include_dirs_size
7127 * sizeof (*lh
->include_dirs
)));
7130 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
7134 /* Add an entry to LH's file name table. */
7136 add_file_name (struct line_header
*lh
,
7138 unsigned int dir_index
,
7139 unsigned int mod_time
,
7140 unsigned int length
)
7142 struct file_entry
*fe
;
7144 /* Grow the array if necessary. */
7145 if (lh
->file_names_size
== 0)
7147 lh
->file_names_size
= 1; /* for testing */
7148 lh
->file_names
= xmalloc (lh
->file_names_size
7149 * sizeof (*lh
->file_names
));
7151 else if (lh
->num_file_names
>= lh
->file_names_size
)
7153 lh
->file_names_size
*= 2;
7154 lh
->file_names
= xrealloc (lh
->file_names
,
7155 (lh
->file_names_size
7156 * sizeof (*lh
->file_names
)));
7159 fe
= &lh
->file_names
[lh
->num_file_names
++];
7161 fe
->dir_index
= dir_index
;
7162 fe
->mod_time
= mod_time
;
7163 fe
->length
= length
;
7169 /* Read the statement program header starting at OFFSET in
7170 .debug_line, according to the endianness of ABFD. Return a pointer
7171 to a struct line_header, allocated using xmalloc.
7173 NOTE: the strings in the include directory and file name tables of
7174 the returned object point into debug_line_buffer, and must not be
7176 static struct line_header
*
7177 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
7178 struct dwarf2_cu
*cu
)
7180 struct cleanup
*back_to
;
7181 struct line_header
*lh
;
7183 unsigned int bytes_read
, offset_size
;
7185 char *cur_dir
, *cur_file
;
7187 if (dwarf2_per_objfile
->line
.buffer
== NULL
)
7189 complaint (&symfile_complaints
, _("missing .debug_line section"));
7193 /* Make sure that at least there's room for the total_length field.
7194 That could be 12 bytes long, but we're just going to fudge that. */
7195 if (offset
+ 4 >= dwarf2_per_objfile
->line
.size
)
7197 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7201 lh
= xmalloc (sizeof (*lh
));
7202 memset (lh
, 0, sizeof (*lh
));
7203 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
7206 line_ptr
= dwarf2_per_objfile
->line
.buffer
+ offset
;
7208 /* Read in the header. */
7210 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
7211 &bytes_read
, &offset_size
);
7212 line_ptr
+= bytes_read
;
7213 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line
.buffer
7214 + dwarf2_per_objfile
->line
.size
))
7216 dwarf2_statement_list_fits_in_line_number_section_complaint ();
7219 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
7220 lh
->version
= read_2_bytes (abfd
, line_ptr
);
7222 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
7223 line_ptr
+= offset_size
;
7224 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
7226 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
7228 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
7230 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
7232 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
7234 lh
->standard_opcode_lengths
7235 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
7237 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
7238 for (i
= 1; i
< lh
->opcode_base
; ++i
)
7240 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
7244 /* Read directory table. */
7245 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7247 line_ptr
+= bytes_read
;
7248 add_include_dir (lh
, cur_dir
);
7250 line_ptr
+= bytes_read
;
7252 /* Read file name table. */
7253 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
7255 unsigned int dir_index
, mod_time
, length
;
7257 line_ptr
+= bytes_read
;
7258 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7259 line_ptr
+= bytes_read
;
7260 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7261 line_ptr
+= bytes_read
;
7262 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7263 line_ptr
+= bytes_read
;
7265 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7267 line_ptr
+= bytes_read
;
7268 lh
->statement_program_start
= line_ptr
;
7270 if (line_ptr
> (dwarf2_per_objfile
->line
.buffer
7271 + dwarf2_per_objfile
->line
.size
))
7272 complaint (&symfile_complaints
,
7273 _("line number info header doesn't fit in `.debug_line' section"));
7275 discard_cleanups (back_to
);
7279 /* This function exists to work around a bug in certain compilers
7280 (particularly GCC 2.95), in which the first line number marker of a
7281 function does not show up until after the prologue, right before
7282 the second line number marker. This function shifts ADDRESS down
7283 to the beginning of the function if necessary, and is called on
7284 addresses passed to record_line. */
7287 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
7289 struct function_range
*fn
;
7291 /* Find the function_range containing address. */
7296 cu
->cached_fn
= cu
->first_fn
;
7300 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7306 while (fn
&& fn
!= cu
->cached_fn
)
7307 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
7317 if (address
!= fn
->lowpc
)
7318 complaint (&symfile_complaints
,
7319 _("misplaced first line number at 0x%lx for '%s'"),
7320 (unsigned long) address
, fn
->name
);
7325 /* Decode the Line Number Program (LNP) for the given line_header
7326 structure and CU. The actual information extracted and the type
7327 of structures created from the LNP depends on the value of PST.
7329 1. If PST is NULL, then this procedure uses the data from the program
7330 to create all necessary symbol tables, and their linetables.
7331 The compilation directory of the file is passed in COMP_DIR,
7332 and must not be NULL.
7334 2. If PST is not NULL, this procedure reads the program to determine
7335 the list of files included by the unit represented by PST, and
7336 builds all the associated partial symbol tables. In this case,
7337 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
7338 is not used to compute the full name of the symtab, and therefore
7339 omitting it when building the partial symtab does not introduce
7340 the potential for inconsistency - a partial symtab and its associated
7341 symbtab having a different fullname -). */
7344 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
7345 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
7347 gdb_byte
*line_ptr
, *extended_end
;
7349 unsigned int bytes_read
, extended_len
;
7350 unsigned char op_code
, extended_op
, adj_opcode
;
7352 struct objfile
*objfile
= cu
->objfile
;
7353 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7354 const int decode_for_pst_p
= (pst
!= NULL
);
7355 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
7357 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7359 line_ptr
= lh
->statement_program_start
;
7360 line_end
= lh
->statement_program_end
;
7362 /* Read the statement sequences until there's nothing left. */
7363 while (line_ptr
< line_end
)
7365 /* state machine registers */
7366 CORE_ADDR address
= 0;
7367 unsigned int file
= 1;
7368 unsigned int line
= 1;
7369 unsigned int column
= 0;
7370 int is_stmt
= lh
->default_is_stmt
;
7371 int basic_block
= 0;
7372 int end_sequence
= 0;
7375 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
7377 /* Start a subfile for the current file of the state machine. */
7378 /* lh->include_dirs and lh->file_names are 0-based, but the
7379 directory and file name numbers in the statement program
7381 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
7385 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7387 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7390 /* Decode the table. */
7391 while (!end_sequence
)
7393 op_code
= read_1_byte (abfd
, line_ptr
);
7395 if (line_ptr
> line_end
)
7397 dwarf2_debug_line_missing_end_sequence_complaint ();
7401 if (op_code
>= lh
->opcode_base
)
7403 /* Special operand. */
7404 adj_opcode
= op_code
- lh
->opcode_base
;
7405 address
+= (adj_opcode
/ lh
->line_range
)
7406 * lh
->minimum_instruction_length
;
7407 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
7408 if (lh
->num_file_names
< file
|| file
== 0)
7409 dwarf2_debug_line_missing_file_complaint ();
7412 lh
->file_names
[file
- 1].included_p
= 1;
7413 if (!decode_for_pst_p
&& is_stmt
)
7415 if (last_subfile
!= current_subfile
)
7417 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7419 record_line (last_subfile
, 0, addr
);
7420 last_subfile
= current_subfile
;
7422 /* Append row to matrix using current values. */
7423 addr
= check_cu_functions (address
, cu
);
7424 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7425 record_line (current_subfile
, line
, addr
);
7430 else switch (op_code
)
7432 case DW_LNS_extended_op
:
7433 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7434 line_ptr
+= bytes_read
;
7435 extended_end
= line_ptr
+ extended_len
;
7436 extended_op
= read_1_byte (abfd
, line_ptr
);
7438 switch (extended_op
)
7440 case DW_LNE_end_sequence
:
7443 case DW_LNE_set_address
:
7444 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
7445 line_ptr
+= bytes_read
;
7446 address
+= baseaddr
;
7448 case DW_LNE_define_file
:
7451 unsigned int dir_index
, mod_time
, length
;
7453 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
7454 line_ptr
+= bytes_read
;
7456 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7457 line_ptr
+= bytes_read
;
7459 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7460 line_ptr
+= bytes_read
;
7462 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7463 line_ptr
+= bytes_read
;
7464 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
7467 case DW_LNE_set_discriminator
:
7468 /* The discriminator is not interesting to the debugger;
7470 line_ptr
= extended_end
;
7473 complaint (&symfile_complaints
,
7474 _("mangled .debug_line section"));
7477 /* Make sure that we parsed the extended op correctly. If e.g.
7478 we expected a different address size than the producer used,
7479 we may have read the wrong number of bytes. */
7480 if (line_ptr
!= extended_end
)
7482 complaint (&symfile_complaints
,
7483 _("mangled .debug_line section"));
7488 if (lh
->num_file_names
< file
|| file
== 0)
7489 dwarf2_debug_line_missing_file_complaint ();
7492 lh
->file_names
[file
- 1].included_p
= 1;
7493 if (!decode_for_pst_p
&& is_stmt
)
7495 if (last_subfile
!= current_subfile
)
7497 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7499 record_line (last_subfile
, 0, addr
);
7500 last_subfile
= current_subfile
;
7502 addr
= check_cu_functions (address
, cu
);
7503 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
7504 record_line (current_subfile
, line
, addr
);
7509 case DW_LNS_advance_pc
:
7510 address
+= lh
->minimum_instruction_length
7511 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7512 line_ptr
+= bytes_read
;
7514 case DW_LNS_advance_line
:
7515 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
7516 line_ptr
+= bytes_read
;
7518 case DW_LNS_set_file
:
7520 /* The arrays lh->include_dirs and lh->file_names are
7521 0-based, but the directory and file name numbers in
7522 the statement program are 1-based. */
7523 struct file_entry
*fe
;
7526 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7527 line_ptr
+= bytes_read
;
7528 if (lh
->num_file_names
< file
|| file
== 0)
7529 dwarf2_debug_line_missing_file_complaint ();
7532 fe
= &lh
->file_names
[file
- 1];
7534 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7535 if (!decode_for_pst_p
)
7537 last_subfile
= current_subfile
;
7538 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7543 case DW_LNS_set_column
:
7544 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7545 line_ptr
+= bytes_read
;
7547 case DW_LNS_negate_stmt
:
7548 is_stmt
= (!is_stmt
);
7550 case DW_LNS_set_basic_block
:
7553 /* Add to the address register of the state machine the
7554 address increment value corresponding to special opcode
7555 255. I.e., this value is scaled by the minimum
7556 instruction length since special opcode 255 would have
7557 scaled the the increment. */
7558 case DW_LNS_const_add_pc
:
7559 address
+= (lh
->minimum_instruction_length
7560 * ((255 - lh
->opcode_base
) / lh
->line_range
));
7562 case DW_LNS_fixed_advance_pc
:
7563 address
+= read_2_bytes (abfd
, line_ptr
);
7568 /* Unknown standard opcode, ignore it. */
7571 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
7573 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
7574 line_ptr
+= bytes_read
;
7579 if (lh
->num_file_names
< file
|| file
== 0)
7580 dwarf2_debug_line_missing_file_complaint ();
7583 lh
->file_names
[file
- 1].included_p
= 1;
7584 if (!decode_for_pst_p
)
7586 addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
7587 record_line (current_subfile
, 0, addr
);
7592 if (decode_for_pst_p
)
7596 /* Now that we're done scanning the Line Header Program, we can
7597 create the psymtab of each included file. */
7598 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
7599 if (lh
->file_names
[file_index
].included_p
== 1)
7601 const struct file_entry fe
= lh
->file_names
[file_index
];
7602 char *include_name
= fe
.name
;
7603 char *dir_name
= NULL
;
7604 char *pst_filename
= pst
->filename
;
7607 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
7609 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
7611 include_name
= concat (dir_name
, SLASH_STRING
,
7612 include_name
, (char *)NULL
);
7613 make_cleanup (xfree
, include_name
);
7616 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
7618 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
7619 pst_filename
, (char *)NULL
);
7620 make_cleanup (xfree
, pst_filename
);
7623 if (strcmp (include_name
, pst_filename
) != 0)
7624 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
7629 /* Make sure a symtab is created for every file, even files
7630 which contain only variables (i.e. no code with associated
7634 struct file_entry
*fe
;
7636 for (i
= 0; i
< lh
->num_file_names
; i
++)
7639 fe
= &lh
->file_names
[i
];
7641 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
7642 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
7644 /* Skip the main file; we don't need it, and it must be
7645 allocated last, so that it will show up before the
7646 non-primary symtabs in the objfile's symtab list. */
7647 if (current_subfile
== first_subfile
)
7650 if (current_subfile
->symtab
== NULL
)
7651 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
7653 fe
->symtab
= current_subfile
->symtab
;
7658 /* Start a subfile for DWARF. FILENAME is the name of the file and
7659 DIRNAME the name of the source directory which contains FILENAME
7660 or NULL if not known. COMP_DIR is the compilation directory for the
7661 linetable's compilation unit or NULL if not known.
7662 This routine tries to keep line numbers from identical absolute and
7663 relative file names in a common subfile.
7665 Using the `list' example from the GDB testsuite, which resides in
7666 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
7667 of /srcdir/list0.c yields the following debugging information for list0.c:
7669 DW_AT_name: /srcdir/list0.c
7670 DW_AT_comp_dir: /compdir
7671 files.files[0].name: list0.h
7672 files.files[0].dir: /srcdir
7673 files.files[1].name: list0.c
7674 files.files[1].dir: /srcdir
7676 The line number information for list0.c has to end up in a single
7677 subfile, so that `break /srcdir/list0.c:1' works as expected.
7678 start_subfile will ensure that this happens provided that we pass the
7679 concatenation of files.files[1].dir and files.files[1].name as the
7683 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
7687 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
7688 `start_symtab' will always pass the contents of DW_AT_comp_dir as
7689 second argument to start_subfile. To be consistent, we do the
7690 same here. In order not to lose the line information directory,
7691 we concatenate it to the filename when it makes sense.
7692 Note that the Dwarf3 standard says (speaking of filenames in line
7693 information): ``The directory index is ignored for file names
7694 that represent full path names''. Thus ignoring dirname in the
7695 `else' branch below isn't an issue. */
7697 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
7698 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
7700 fullname
= filename
;
7702 start_subfile (fullname
, comp_dir
);
7704 if (fullname
!= filename
)
7709 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
7710 struct dwarf2_cu
*cu
)
7712 struct objfile
*objfile
= cu
->objfile
;
7713 struct comp_unit_head
*cu_header
= &cu
->header
;
7715 /* NOTE drow/2003-01-30: There used to be a comment and some special
7716 code here to turn a symbol with DW_AT_external and a
7717 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7718 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7719 with some versions of binutils) where shared libraries could have
7720 relocations against symbols in their debug information - the
7721 minimal symbol would have the right address, but the debug info
7722 would not. It's no longer necessary, because we will explicitly
7723 apply relocations when we read in the debug information now. */
7725 /* A DW_AT_location attribute with no contents indicates that a
7726 variable has been optimized away. */
7727 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
7729 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7733 /* Handle one degenerate form of location expression specially, to
7734 preserve GDB's previous behavior when section offsets are
7735 specified. If this is just a DW_OP_addr then mark this symbol
7738 if (attr_form_is_block (attr
)
7739 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
7740 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
7744 SYMBOL_VALUE_ADDRESS (sym
) =
7745 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
7746 SYMBOL_CLASS (sym
) = LOC_STATIC
;
7747 fixup_symbol_section (sym
, objfile
);
7748 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
7749 SYMBOL_SECTION (sym
));
7753 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7754 expression evaluator, and use LOC_COMPUTED only when necessary
7755 (i.e. when the value of a register or memory location is
7756 referenced, or a thread-local block, etc.). Then again, it might
7757 not be worthwhile. I'm assuming that it isn't unless performance
7758 or memory numbers show me otherwise. */
7760 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
7761 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
7764 /* Given a pointer to a DWARF information entry, figure out if we need
7765 to make a symbol table entry for it, and if so, create a new entry
7766 and return a pointer to it.
7767 If TYPE is NULL, determine symbol type from the die, otherwise
7768 used the passed type. */
7770 static struct symbol
*
7771 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
7773 struct objfile
*objfile
= cu
->objfile
;
7774 struct symbol
*sym
= NULL
;
7776 struct attribute
*attr
= NULL
;
7777 struct attribute
*attr2
= NULL
;
7779 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
7781 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7783 if (die
->tag
!= DW_TAG_namespace
)
7784 name
= dwarf2_linkage_name (die
, cu
);
7786 name
= TYPE_NAME (type
);
7790 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
7791 sizeof (struct symbol
));
7792 OBJSTAT (objfile
, n_syms
++);
7793 memset (sym
, 0, sizeof (struct symbol
));
7795 /* Cache this symbol's name and the name's demangled form (if any). */
7796 SYMBOL_LANGUAGE (sym
) = cu
->language
;
7797 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
7799 /* Default assumptions.
7800 Use the passed type or decode it from the die. */
7801 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7802 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7804 SYMBOL_TYPE (sym
) = type
;
7806 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
7807 attr
= dwarf2_attr (die
,
7808 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
7812 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
7815 attr
= dwarf2_attr (die
,
7816 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
7820 int file_index
= DW_UNSND (attr
);
7821 if (cu
->line_header
== NULL
7822 || file_index
> cu
->line_header
->num_file_names
)
7823 complaint (&symfile_complaints
,
7824 _("file index out of range"));
7825 else if (file_index
> 0)
7827 struct file_entry
*fe
;
7828 fe
= &cu
->line_header
->file_names
[file_index
- 1];
7829 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
7836 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7839 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
7841 SYMBOL_CLASS (sym
) = LOC_LABEL
;
7843 case DW_TAG_subprogram
:
7844 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7846 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7847 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7848 if ((attr2
&& (DW_UNSND (attr2
) != 0))
7849 || cu
->language
== language_ada
)
7851 /* Subprograms marked external are stored as a global symbol.
7852 Ada subprograms, whether marked external or not, are always
7853 stored as a global symbol, because we want to be able to
7854 access them globally. For instance, we want to be able
7855 to break on a nested subprogram without having to
7856 specify the context. */
7857 add_symbol_to_list (sym
, &global_symbols
);
7861 add_symbol_to_list (sym
, cu
->list_in_scope
);
7864 case DW_TAG_inlined_subroutine
:
7865 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7867 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7868 SYMBOL_INLINED (sym
) = 1;
7869 /* Do not add the symbol to any lists. It will be found via
7870 BLOCK_FUNCTION from the blockvector. */
7872 case DW_TAG_variable
:
7873 /* Compilation with minimal debug info may result in variables
7874 with missing type entries. Change the misleading `void' type
7875 to something sensible. */
7876 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
7878 = objfile_type (objfile
)->nodebug_data_symbol
;
7880 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7883 dwarf2_const_value (attr
, sym
, cu
);
7884 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7885 if (attr2
&& (DW_UNSND (attr2
) != 0))
7886 add_symbol_to_list (sym
, &global_symbols
);
7888 add_symbol_to_list (sym
, cu
->list_in_scope
);
7891 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7894 var_decode_location (attr
, sym
, cu
);
7895 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7896 if (attr2
&& (DW_UNSND (attr2
) != 0))
7897 add_symbol_to_list (sym
, &global_symbols
);
7899 add_symbol_to_list (sym
, cu
->list_in_scope
);
7903 /* We do not know the address of this symbol.
7904 If it is an external symbol and we have type information
7905 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7906 The address of the variable will then be determined from
7907 the minimal symbol table whenever the variable is
7909 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7910 if (attr2
&& (DW_UNSND (attr2
) != 0)
7911 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
7913 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
7914 add_symbol_to_list (sym
, cu
->list_in_scope
);
7916 else if (!die_is_declaration (die
, cu
))
7918 /* Use the default LOC_OPTIMIZED_OUT class. */
7919 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
7920 add_symbol_to_list (sym
, cu
->list_in_scope
);
7924 case DW_TAG_formal_parameter
:
7925 /* If we are inside a function, mark this as an argument. If
7926 not, we might be looking at an argument to an inlined function
7927 when we do not have enough information to show inlined frames;
7928 pretend it's a local variable in that case so that the user can
7930 if (context_stack_depth
> 0
7931 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
7932 SYMBOL_IS_ARGUMENT (sym
) = 1;
7933 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7936 var_decode_location (attr
, sym
, cu
);
7938 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7941 dwarf2_const_value (attr
, sym
, cu
);
7943 add_symbol_to_list (sym
, cu
->list_in_scope
);
7945 case DW_TAG_unspecified_parameters
:
7946 /* From varargs functions; gdb doesn't seem to have any
7947 interest in this information, so just ignore it for now.
7950 case DW_TAG_class_type
:
7951 case DW_TAG_interface_type
:
7952 case DW_TAG_structure_type
:
7953 case DW_TAG_union_type
:
7954 case DW_TAG_set_type
:
7955 case DW_TAG_enumeration_type
:
7956 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7957 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7959 /* Make sure that the symbol includes appropriate enclosing
7960 classes/namespaces in its name. These are calculated in
7961 read_structure_type, and the correct name is saved in
7964 if (cu
->language
== language_cplus
7965 || cu
->language
== language_java
)
7967 struct type
*type
= SYMBOL_TYPE (sym
);
7969 if (TYPE_TAG_NAME (type
) != NULL
)
7971 /* FIXME: carlton/2003-11-10: Should this use
7972 SYMBOL_SET_NAMES instead? (The same problem also
7973 arises further down in this function.) */
7974 /* The type's name is already allocated along with
7975 this objfile, so we don't need to duplicate it
7977 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
7982 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7983 really ever be static objects: otherwise, if you try
7984 to, say, break of a class's method and you're in a file
7985 which doesn't mention that class, it won't work unless
7986 the check for all static symbols in lookup_symbol_aux
7987 saves you. See the OtherFileClass tests in
7988 gdb.c++/namespace.exp. */
7990 struct pending
**list_to_add
;
7992 list_to_add
= (cu
->list_in_scope
== &file_symbols
7993 && (cu
->language
== language_cplus
7994 || cu
->language
== language_java
)
7995 ? &global_symbols
: cu
->list_in_scope
);
7997 add_symbol_to_list (sym
, list_to_add
);
7999 /* The semantics of C++ state that "struct foo { ... }" also
8000 defines a typedef for "foo". A Java class declaration also
8001 defines a typedef for the class. */
8002 if (cu
->language
== language_cplus
8003 || cu
->language
== language_java
8004 || cu
->language
== language_ada
)
8006 /* The symbol's name is already allocated along with
8007 this objfile, so we don't need to duplicate it for
8009 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
8010 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
8014 case DW_TAG_typedef
:
8015 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8016 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8017 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8018 add_symbol_to_list (sym
, cu
->list_in_scope
);
8020 case DW_TAG_base_type
:
8021 case DW_TAG_subrange_type
:
8022 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8023 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
8024 add_symbol_to_list (sym
, cu
->list_in_scope
);
8026 case DW_TAG_enumerator
:
8027 SYMBOL_LINKAGE_NAME (sym
) = (char *) dwarf2_full_name (die
, cu
);
8028 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
8031 dwarf2_const_value (attr
, sym
, cu
);
8034 /* NOTE: carlton/2003-11-10: See comment above in the
8035 DW_TAG_class_type, etc. block. */
8037 struct pending
**list_to_add
;
8039 list_to_add
= (cu
->list_in_scope
== &file_symbols
8040 && (cu
->language
== language_cplus
8041 || cu
->language
== language_java
)
8042 ? &global_symbols
: cu
->list_in_scope
);
8044 add_symbol_to_list (sym
, list_to_add
);
8047 case DW_TAG_namespace
:
8048 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
8049 add_symbol_to_list (sym
, &global_symbols
);
8052 /* Not a tag we recognize. Hopefully we aren't processing
8053 trash data, but since we must specifically ignore things
8054 we don't recognize, there is nothing else we should do at
8056 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
8057 dwarf_tag_name (die
->tag
));
8061 /* For the benefit of old versions of GCC, check for anonymous
8062 namespaces based on the demangled name. */
8063 if (!processing_has_namespace_info
8064 && cu
->language
== language_cplus
8065 && dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
) != NULL
)
8066 cp_scan_for_anonymous_namespaces (sym
);
8071 /* Copy constant value from an attribute to a symbol. */
8074 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
8075 struct dwarf2_cu
*cu
)
8077 struct objfile
*objfile
= cu
->objfile
;
8078 struct comp_unit_head
*cu_header
= &cu
->header
;
8079 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
8080 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
8081 struct dwarf_block
*blk
;
8086 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
8087 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8088 cu_header
->addr_size
,
8089 TYPE_LENGTH (SYMBOL_TYPE
8091 SYMBOL_VALUE_BYTES (sym
) =
8092 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
8093 /* NOTE: cagney/2003-05-09: In-lined store_address call with
8094 it's body - store_unsigned_integer. */
8095 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
8096 DW_ADDR (attr
), byte_order
);
8097 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8099 case DW_FORM_string
:
8101 /* DW_STRING is already allocated on the obstack, point directly
8103 SYMBOL_VALUE_BYTES (sym
) = (gdb_byte
*) DW_STRING (attr
);
8104 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8106 case DW_FORM_block1
:
8107 case DW_FORM_block2
:
8108 case DW_FORM_block4
:
8110 blk
= DW_BLOCK (attr
);
8111 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
8112 dwarf2_const_value_length_mismatch_complaint (SYMBOL_PRINT_NAME (sym
),
8114 TYPE_LENGTH (SYMBOL_TYPE
8116 SYMBOL_VALUE_BYTES (sym
) =
8117 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
8118 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
8119 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
8122 /* The DW_AT_const_value attributes are supposed to carry the
8123 symbol's value "represented as it would be on the target
8124 architecture." By the time we get here, it's already been
8125 converted to host endianness, so we just need to sign- or
8126 zero-extend it as appropriate. */
8128 dwarf2_const_value_data (attr
, sym
, 8);
8131 dwarf2_const_value_data (attr
, sym
, 16);
8134 dwarf2_const_value_data (attr
, sym
, 32);
8137 dwarf2_const_value_data (attr
, sym
, 64);
8141 SYMBOL_VALUE (sym
) = DW_SND (attr
);
8142 SYMBOL_CLASS (sym
) = LOC_CONST
;
8146 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
8147 SYMBOL_CLASS (sym
) = LOC_CONST
;
8151 complaint (&symfile_complaints
,
8152 _("unsupported const value attribute form: '%s'"),
8153 dwarf_form_name (attr
->form
));
8154 SYMBOL_VALUE (sym
) = 0;
8155 SYMBOL_CLASS (sym
) = LOC_CONST
;
8161 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
8162 or zero-extend it as appropriate for the symbol's type. */
8164 dwarf2_const_value_data (struct attribute
*attr
,
8168 LONGEST l
= DW_UNSND (attr
);
8170 if (bits
< sizeof (l
) * 8)
8172 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
8173 l
&= ((LONGEST
) 1 << bits
) - 1;
8175 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
8178 SYMBOL_VALUE (sym
) = l
;
8179 SYMBOL_CLASS (sym
) = LOC_CONST
;
8183 /* Return the type of the die in question using its DW_AT_type attribute. */
8185 static struct type
*
8186 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8189 struct attribute
*type_attr
;
8190 struct die_info
*type_die
;
8192 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
8195 /* A missing DW_AT_type represents a void type. */
8196 return objfile_type (cu
->objfile
)->builtin_void
;
8199 type_die
= follow_die_ref (die
, type_attr
, &cu
);
8201 type
= tag_type_to_type (type_die
, cu
);
8204 dump_die_for_error (type_die
);
8205 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
8211 /* Return the containing type of the die in question using its
8212 DW_AT_containing_type attribute. */
8214 static struct type
*
8215 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8217 struct type
*type
= NULL
;
8218 struct attribute
*type_attr
;
8219 struct die_info
*type_die
= NULL
;
8221 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
8224 type_die
= follow_die_ref (die
, type_attr
, &cu
);
8225 type
= tag_type_to_type (type_die
, cu
);
8230 dump_die_for_error (type_die
);
8231 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
8237 static struct type
*
8238 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
8240 struct type
*this_type
;
8242 this_type
= read_type_die (die
, cu
);
8245 dump_die_for_error (die
);
8246 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
8252 static struct type
*
8253 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
8255 struct type
*this_type
;
8257 this_type
= get_die_type (die
, cu
);
8263 case DW_TAG_class_type
:
8264 case DW_TAG_interface_type
:
8265 case DW_TAG_structure_type
:
8266 case DW_TAG_union_type
:
8267 this_type
= read_structure_type (die
, cu
);
8269 case DW_TAG_enumeration_type
:
8270 this_type
= read_enumeration_type (die
, cu
);
8272 case DW_TAG_subprogram
:
8273 case DW_TAG_subroutine_type
:
8274 case DW_TAG_inlined_subroutine
:
8275 this_type
= read_subroutine_type (die
, cu
);
8277 case DW_TAG_array_type
:
8278 this_type
= read_array_type (die
, cu
);
8280 case DW_TAG_set_type
:
8281 this_type
= read_set_type (die
, cu
);
8283 case DW_TAG_pointer_type
:
8284 this_type
= read_tag_pointer_type (die
, cu
);
8286 case DW_TAG_ptr_to_member_type
:
8287 this_type
= read_tag_ptr_to_member_type (die
, cu
);
8289 case DW_TAG_reference_type
:
8290 this_type
= read_tag_reference_type (die
, cu
);
8292 case DW_TAG_const_type
:
8293 this_type
= read_tag_const_type (die
, cu
);
8295 case DW_TAG_volatile_type
:
8296 this_type
= read_tag_volatile_type (die
, cu
);
8298 case DW_TAG_string_type
:
8299 this_type
= read_tag_string_type (die
, cu
);
8301 case DW_TAG_typedef
:
8302 this_type
= read_typedef (die
, cu
);
8304 case DW_TAG_subrange_type
:
8305 this_type
= read_subrange_type (die
, cu
);
8307 case DW_TAG_base_type
:
8308 this_type
= read_base_type (die
, cu
);
8310 case DW_TAG_unspecified_type
:
8311 this_type
= read_unspecified_type (die
, cu
);
8313 case DW_TAG_namespace
:
8314 this_type
= read_namespace_type (die
, cu
);
8317 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
8318 dwarf_tag_name (die
->tag
));
8325 /* Return the name of the namespace/class that DIE is defined within,
8326 or "" if we can't tell. The caller should not xfree the result.
8328 For example, if we're within the method foo() in the following
8338 then determine_prefix on foo's die will return "N::C". */
8341 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
8343 struct die_info
*parent
, *spec_die
;
8344 struct dwarf2_cu
*spec_cu
;
8345 struct type
*parent_type
;
8347 if (cu
->language
!= language_cplus
8348 && cu
->language
!= language_java
)
8351 /* We have to be careful in the presence of DW_AT_specification.
8352 For example, with GCC 3.4, given the code
8356 // Definition of N::foo.
8360 then we'll have a tree of DIEs like this:
8362 1: DW_TAG_compile_unit
8363 2: DW_TAG_namespace // N
8364 3: DW_TAG_subprogram // declaration of N::foo
8365 4: DW_TAG_subprogram // definition of N::foo
8366 DW_AT_specification // refers to die #3
8368 Thus, when processing die #4, we have to pretend that we're in
8369 the context of its DW_AT_specification, namely the contex of die
8372 spec_die
= die_specification (die
, &spec_cu
);
8373 if (spec_die
== NULL
)
8374 parent
= die
->parent
;
8377 parent
= spec_die
->parent
;
8384 switch (parent
->tag
)
8386 case DW_TAG_namespace
:
8387 parent_type
= read_type_die (parent
, cu
);
8388 /* We give a name to even anonymous namespaces. */
8389 return TYPE_TAG_NAME (parent_type
);
8390 case DW_TAG_class_type
:
8391 case DW_TAG_interface_type
:
8392 case DW_TAG_structure_type
:
8393 case DW_TAG_union_type
:
8394 parent_type
= read_type_die (parent
, cu
);
8395 if (TYPE_TAG_NAME (parent_type
) != NULL
)
8396 return TYPE_TAG_NAME (parent_type
);
8398 /* An anonymous structure is only allowed non-static data
8399 members; no typedefs, no member functions, et cetera.
8400 So it does not need a prefix. */
8403 return determine_prefix (parent
, cu
);
8407 /* Return a newly-allocated string formed by concatenating PREFIX and
8408 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
8409 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
8410 perform an obconcat, otherwise allocate storage for the result. The CU argument
8411 is used to determine the language and hence, the appropriate separator. */
8413 #define MAX_SEP_LEN 2 /* sizeof ("::") */
8416 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
8417 struct dwarf2_cu
*cu
)
8421 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
8423 else if (cu
->language
== language_java
)
8435 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
8436 strcpy (retval
, prefix
);
8437 strcat (retval
, sep
);
8438 strcat (retval
, suffix
);
8443 /* We have an obstack. */
8444 return obconcat (obs
, prefix
, sep
, suffix
);
8448 /* Return sibling of die, NULL if no sibling. */
8450 static struct die_info
*
8451 sibling_die (struct die_info
*die
)
8453 return die
->sibling
;
8456 /* Get linkage name of a die, return NULL if not found. */
8459 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8461 struct attribute
*attr
;
8463 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
8464 if (attr
&& DW_STRING (attr
))
8465 return DW_STRING (attr
);
8466 return dwarf2_name (die
, cu
);
8469 /* Get name of a die, return NULL if not found. */
8472 dwarf2_canonicalize_name (char *name
, struct dwarf2_cu
*cu
,
8473 struct obstack
*obstack
)
8475 if (name
&& cu
->language
== language_cplus
)
8477 char *canon_name
= cp_canonicalize_string (name
);
8479 if (canon_name
!= NULL
)
8481 if (strcmp (canon_name
, name
) != 0)
8482 name
= obsavestring (canon_name
, strlen (canon_name
),
8491 /* Get name of a die, return NULL if not found. */
8494 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
8496 struct attribute
*attr
;
8498 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
8499 if (!attr
|| !DW_STRING (attr
))
8504 case DW_TAG_compile_unit
:
8505 /* Compilation units have a DW_AT_name that is a filename, not
8506 a source language identifier. */
8507 case DW_TAG_enumeration_type
:
8508 case DW_TAG_enumerator
:
8509 /* These tags always have simple identifiers already; no need
8510 to canonicalize them. */
8511 return DW_STRING (attr
);
8513 if (attr
->form
!= GDB_FORM_cached_string
)
8516 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
8517 &cu
->objfile
->objfile_obstack
);
8518 attr
->form
= GDB_FORM_cached_string
;
8520 return DW_STRING (attr
);
8524 /* Return the die that this die in an extension of, or NULL if there
8525 is none. *EXT_CU is the CU containing DIE on input, and the CU
8526 containing the return value on output. */
8528 static struct die_info
*
8529 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
8531 struct attribute
*attr
;
8533 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
8537 return follow_die_ref (die
, attr
, ext_cu
);
8540 /* Convert a DIE tag into its string name. */
8543 dwarf_tag_name (unsigned tag
)
8547 case DW_TAG_padding
:
8548 return "DW_TAG_padding";
8549 case DW_TAG_array_type
:
8550 return "DW_TAG_array_type";
8551 case DW_TAG_class_type
:
8552 return "DW_TAG_class_type";
8553 case DW_TAG_entry_point
:
8554 return "DW_TAG_entry_point";
8555 case DW_TAG_enumeration_type
:
8556 return "DW_TAG_enumeration_type";
8557 case DW_TAG_formal_parameter
:
8558 return "DW_TAG_formal_parameter";
8559 case DW_TAG_imported_declaration
:
8560 return "DW_TAG_imported_declaration";
8562 return "DW_TAG_label";
8563 case DW_TAG_lexical_block
:
8564 return "DW_TAG_lexical_block";
8566 return "DW_TAG_member";
8567 case DW_TAG_pointer_type
:
8568 return "DW_TAG_pointer_type";
8569 case DW_TAG_reference_type
:
8570 return "DW_TAG_reference_type";
8571 case DW_TAG_compile_unit
:
8572 return "DW_TAG_compile_unit";
8573 case DW_TAG_string_type
:
8574 return "DW_TAG_string_type";
8575 case DW_TAG_structure_type
:
8576 return "DW_TAG_structure_type";
8577 case DW_TAG_subroutine_type
:
8578 return "DW_TAG_subroutine_type";
8579 case DW_TAG_typedef
:
8580 return "DW_TAG_typedef";
8581 case DW_TAG_union_type
:
8582 return "DW_TAG_union_type";
8583 case DW_TAG_unspecified_parameters
:
8584 return "DW_TAG_unspecified_parameters";
8585 case DW_TAG_variant
:
8586 return "DW_TAG_variant";
8587 case DW_TAG_common_block
:
8588 return "DW_TAG_common_block";
8589 case DW_TAG_common_inclusion
:
8590 return "DW_TAG_common_inclusion";
8591 case DW_TAG_inheritance
:
8592 return "DW_TAG_inheritance";
8593 case DW_TAG_inlined_subroutine
:
8594 return "DW_TAG_inlined_subroutine";
8596 return "DW_TAG_module";
8597 case DW_TAG_ptr_to_member_type
:
8598 return "DW_TAG_ptr_to_member_type";
8599 case DW_TAG_set_type
:
8600 return "DW_TAG_set_type";
8601 case DW_TAG_subrange_type
:
8602 return "DW_TAG_subrange_type";
8603 case DW_TAG_with_stmt
:
8604 return "DW_TAG_with_stmt";
8605 case DW_TAG_access_declaration
:
8606 return "DW_TAG_access_declaration";
8607 case DW_TAG_base_type
:
8608 return "DW_TAG_base_type";
8609 case DW_TAG_catch_block
:
8610 return "DW_TAG_catch_block";
8611 case DW_TAG_const_type
:
8612 return "DW_TAG_const_type";
8613 case DW_TAG_constant
:
8614 return "DW_TAG_constant";
8615 case DW_TAG_enumerator
:
8616 return "DW_TAG_enumerator";
8617 case DW_TAG_file_type
:
8618 return "DW_TAG_file_type";
8620 return "DW_TAG_friend";
8621 case DW_TAG_namelist
:
8622 return "DW_TAG_namelist";
8623 case DW_TAG_namelist_item
:
8624 return "DW_TAG_namelist_item";
8625 case DW_TAG_packed_type
:
8626 return "DW_TAG_packed_type";
8627 case DW_TAG_subprogram
:
8628 return "DW_TAG_subprogram";
8629 case DW_TAG_template_type_param
:
8630 return "DW_TAG_template_type_param";
8631 case DW_TAG_template_value_param
:
8632 return "DW_TAG_template_value_param";
8633 case DW_TAG_thrown_type
:
8634 return "DW_TAG_thrown_type";
8635 case DW_TAG_try_block
:
8636 return "DW_TAG_try_block";
8637 case DW_TAG_variant_part
:
8638 return "DW_TAG_variant_part";
8639 case DW_TAG_variable
:
8640 return "DW_TAG_variable";
8641 case DW_TAG_volatile_type
:
8642 return "DW_TAG_volatile_type";
8643 case DW_TAG_dwarf_procedure
:
8644 return "DW_TAG_dwarf_procedure";
8645 case DW_TAG_restrict_type
:
8646 return "DW_TAG_restrict_type";
8647 case DW_TAG_interface_type
:
8648 return "DW_TAG_interface_type";
8649 case DW_TAG_namespace
:
8650 return "DW_TAG_namespace";
8651 case DW_TAG_imported_module
:
8652 return "DW_TAG_imported_module";
8653 case DW_TAG_unspecified_type
:
8654 return "DW_TAG_unspecified_type";
8655 case DW_TAG_partial_unit
:
8656 return "DW_TAG_partial_unit";
8657 case DW_TAG_imported_unit
:
8658 return "DW_TAG_imported_unit";
8659 case DW_TAG_condition
:
8660 return "DW_TAG_condition";
8661 case DW_TAG_shared_type
:
8662 return "DW_TAG_shared_type";
8663 case DW_TAG_MIPS_loop
:
8664 return "DW_TAG_MIPS_loop";
8665 case DW_TAG_HP_array_descriptor
:
8666 return "DW_TAG_HP_array_descriptor";
8667 case DW_TAG_format_label
:
8668 return "DW_TAG_format_label";
8669 case DW_TAG_function_template
:
8670 return "DW_TAG_function_template";
8671 case DW_TAG_class_template
:
8672 return "DW_TAG_class_template";
8673 case DW_TAG_GNU_BINCL
:
8674 return "DW_TAG_GNU_BINCL";
8675 case DW_TAG_GNU_EINCL
:
8676 return "DW_TAG_GNU_EINCL";
8677 case DW_TAG_upc_shared_type
:
8678 return "DW_TAG_upc_shared_type";
8679 case DW_TAG_upc_strict_type
:
8680 return "DW_TAG_upc_strict_type";
8681 case DW_TAG_upc_relaxed_type
:
8682 return "DW_TAG_upc_relaxed_type";
8683 case DW_TAG_PGI_kanji_type
:
8684 return "DW_TAG_PGI_kanji_type";
8685 case DW_TAG_PGI_interface_block
:
8686 return "DW_TAG_PGI_interface_block";
8688 return "DW_TAG_<unknown>";
8692 /* Convert a DWARF attribute code into its string name. */
8695 dwarf_attr_name (unsigned attr
)
8700 return "DW_AT_sibling";
8701 case DW_AT_location
:
8702 return "DW_AT_location";
8704 return "DW_AT_name";
8705 case DW_AT_ordering
:
8706 return "DW_AT_ordering";
8707 case DW_AT_subscr_data
:
8708 return "DW_AT_subscr_data";
8709 case DW_AT_byte_size
:
8710 return "DW_AT_byte_size";
8711 case DW_AT_bit_offset
:
8712 return "DW_AT_bit_offset";
8713 case DW_AT_bit_size
:
8714 return "DW_AT_bit_size";
8715 case DW_AT_element_list
:
8716 return "DW_AT_element_list";
8717 case DW_AT_stmt_list
:
8718 return "DW_AT_stmt_list";
8720 return "DW_AT_low_pc";
8722 return "DW_AT_high_pc";
8723 case DW_AT_language
:
8724 return "DW_AT_language";
8726 return "DW_AT_member";
8728 return "DW_AT_discr";
8729 case DW_AT_discr_value
:
8730 return "DW_AT_discr_value";
8731 case DW_AT_visibility
:
8732 return "DW_AT_visibility";
8734 return "DW_AT_import";
8735 case DW_AT_string_length
:
8736 return "DW_AT_string_length";
8737 case DW_AT_common_reference
:
8738 return "DW_AT_common_reference";
8739 case DW_AT_comp_dir
:
8740 return "DW_AT_comp_dir";
8741 case DW_AT_const_value
:
8742 return "DW_AT_const_value";
8743 case DW_AT_containing_type
:
8744 return "DW_AT_containing_type";
8745 case DW_AT_default_value
:
8746 return "DW_AT_default_value";
8748 return "DW_AT_inline";
8749 case DW_AT_is_optional
:
8750 return "DW_AT_is_optional";
8751 case DW_AT_lower_bound
:
8752 return "DW_AT_lower_bound";
8753 case DW_AT_producer
:
8754 return "DW_AT_producer";
8755 case DW_AT_prototyped
:
8756 return "DW_AT_prototyped";
8757 case DW_AT_return_addr
:
8758 return "DW_AT_return_addr";
8759 case DW_AT_start_scope
:
8760 return "DW_AT_start_scope";
8761 case DW_AT_bit_stride
:
8762 return "DW_AT_bit_stride";
8763 case DW_AT_upper_bound
:
8764 return "DW_AT_upper_bound";
8765 case DW_AT_abstract_origin
:
8766 return "DW_AT_abstract_origin";
8767 case DW_AT_accessibility
:
8768 return "DW_AT_accessibility";
8769 case DW_AT_address_class
:
8770 return "DW_AT_address_class";
8771 case DW_AT_artificial
:
8772 return "DW_AT_artificial";
8773 case DW_AT_base_types
:
8774 return "DW_AT_base_types";
8775 case DW_AT_calling_convention
:
8776 return "DW_AT_calling_convention";
8778 return "DW_AT_count";
8779 case DW_AT_data_member_location
:
8780 return "DW_AT_data_member_location";
8781 case DW_AT_decl_column
:
8782 return "DW_AT_decl_column";
8783 case DW_AT_decl_file
:
8784 return "DW_AT_decl_file";
8785 case DW_AT_decl_line
:
8786 return "DW_AT_decl_line";
8787 case DW_AT_declaration
:
8788 return "DW_AT_declaration";
8789 case DW_AT_discr_list
:
8790 return "DW_AT_discr_list";
8791 case DW_AT_encoding
:
8792 return "DW_AT_encoding";
8793 case DW_AT_external
:
8794 return "DW_AT_external";
8795 case DW_AT_frame_base
:
8796 return "DW_AT_frame_base";
8798 return "DW_AT_friend";
8799 case DW_AT_identifier_case
:
8800 return "DW_AT_identifier_case";
8801 case DW_AT_macro_info
:
8802 return "DW_AT_macro_info";
8803 case DW_AT_namelist_items
:
8804 return "DW_AT_namelist_items";
8805 case DW_AT_priority
:
8806 return "DW_AT_priority";
8808 return "DW_AT_segment";
8809 case DW_AT_specification
:
8810 return "DW_AT_specification";
8811 case DW_AT_static_link
:
8812 return "DW_AT_static_link";
8814 return "DW_AT_type";
8815 case DW_AT_use_location
:
8816 return "DW_AT_use_location";
8817 case DW_AT_variable_parameter
:
8818 return "DW_AT_variable_parameter";
8819 case DW_AT_virtuality
:
8820 return "DW_AT_virtuality";
8821 case DW_AT_vtable_elem_location
:
8822 return "DW_AT_vtable_elem_location";
8823 /* DWARF 3 values. */
8824 case DW_AT_allocated
:
8825 return "DW_AT_allocated";
8826 case DW_AT_associated
:
8827 return "DW_AT_associated";
8828 case DW_AT_data_location
:
8829 return "DW_AT_data_location";
8830 case DW_AT_byte_stride
:
8831 return "DW_AT_byte_stride";
8832 case DW_AT_entry_pc
:
8833 return "DW_AT_entry_pc";
8834 case DW_AT_use_UTF8
:
8835 return "DW_AT_use_UTF8";
8836 case DW_AT_extension
:
8837 return "DW_AT_extension";
8839 return "DW_AT_ranges";
8840 case DW_AT_trampoline
:
8841 return "DW_AT_trampoline";
8842 case DW_AT_call_column
:
8843 return "DW_AT_call_column";
8844 case DW_AT_call_file
:
8845 return "DW_AT_call_file";
8846 case DW_AT_call_line
:
8847 return "DW_AT_call_line";
8848 case DW_AT_description
:
8849 return "DW_AT_description";
8850 case DW_AT_binary_scale
:
8851 return "DW_AT_binary_scale";
8852 case DW_AT_decimal_scale
:
8853 return "DW_AT_decimal_scale";
8855 return "DW_AT_small";
8856 case DW_AT_decimal_sign
:
8857 return "DW_AT_decimal_sign";
8858 case DW_AT_digit_count
:
8859 return "DW_AT_digit_count";
8860 case DW_AT_picture_string
:
8861 return "DW_AT_picture_string";
8863 return "DW_AT_mutable";
8864 case DW_AT_threads_scaled
:
8865 return "DW_AT_threads_scaled";
8866 case DW_AT_explicit
:
8867 return "DW_AT_explicit";
8868 case DW_AT_object_pointer
:
8869 return "DW_AT_object_pointer";
8870 case DW_AT_endianity
:
8871 return "DW_AT_endianity";
8872 case DW_AT_elemental
:
8873 return "DW_AT_elemental";
8875 return "DW_AT_pure";
8876 case DW_AT_recursive
:
8877 return "DW_AT_recursive";
8878 /* SGI/MIPS extensions. */
8879 #ifdef MIPS /* collides with DW_AT_HP_block_index */
8880 case DW_AT_MIPS_fde
:
8881 return "DW_AT_MIPS_fde";
8883 case DW_AT_MIPS_loop_begin
:
8884 return "DW_AT_MIPS_loop_begin";
8885 case DW_AT_MIPS_tail_loop_begin
:
8886 return "DW_AT_MIPS_tail_loop_begin";
8887 case DW_AT_MIPS_epilog_begin
:
8888 return "DW_AT_MIPS_epilog_begin";
8889 case DW_AT_MIPS_loop_unroll_factor
:
8890 return "DW_AT_MIPS_loop_unroll_factor";
8891 case DW_AT_MIPS_software_pipeline_depth
:
8892 return "DW_AT_MIPS_software_pipeline_depth";
8893 case DW_AT_MIPS_linkage_name
:
8894 return "DW_AT_MIPS_linkage_name";
8895 case DW_AT_MIPS_stride
:
8896 return "DW_AT_MIPS_stride";
8897 case DW_AT_MIPS_abstract_name
:
8898 return "DW_AT_MIPS_abstract_name";
8899 case DW_AT_MIPS_clone_origin
:
8900 return "DW_AT_MIPS_clone_origin";
8901 case DW_AT_MIPS_has_inlines
:
8902 return "DW_AT_MIPS_has_inlines";
8903 /* HP extensions. */
8904 #ifndef MIPS /* collides with DW_AT_MIPS_fde */
8905 case DW_AT_HP_block_index
:
8906 return "DW_AT_HP_block_index";
8908 case DW_AT_HP_unmodifiable
:
8909 return "DW_AT_HP_unmodifiable";
8910 case DW_AT_HP_actuals_stmt_list
:
8911 return "DW_AT_HP_actuals_stmt_list";
8912 case DW_AT_HP_proc_per_section
:
8913 return "DW_AT_HP_proc_per_section";
8914 case DW_AT_HP_raw_data_ptr
:
8915 return "DW_AT_HP_raw_data_ptr";
8916 case DW_AT_HP_pass_by_reference
:
8917 return "DW_AT_HP_pass_by_reference";
8918 case DW_AT_HP_opt_level
:
8919 return "DW_AT_HP_opt_level";
8920 case DW_AT_HP_prof_version_id
:
8921 return "DW_AT_HP_prof_version_id";
8922 case DW_AT_HP_opt_flags
:
8923 return "DW_AT_HP_opt_flags";
8924 case DW_AT_HP_cold_region_low_pc
:
8925 return "DW_AT_HP_cold_region_low_pc";
8926 case DW_AT_HP_cold_region_high_pc
:
8927 return "DW_AT_HP_cold_region_high_pc";
8928 case DW_AT_HP_all_variables_modifiable
:
8929 return "DW_AT_HP_all_variables_modifiable";
8930 case DW_AT_HP_linkage_name
:
8931 return "DW_AT_HP_linkage_name";
8932 case DW_AT_HP_prof_flags
:
8933 return "DW_AT_HP_prof_flags";
8934 /* GNU extensions. */
8935 case DW_AT_sf_names
:
8936 return "DW_AT_sf_names";
8937 case DW_AT_src_info
:
8938 return "DW_AT_src_info";
8939 case DW_AT_mac_info
:
8940 return "DW_AT_mac_info";
8941 case DW_AT_src_coords
:
8942 return "DW_AT_src_coords";
8943 case DW_AT_body_begin
:
8944 return "DW_AT_body_begin";
8945 case DW_AT_body_end
:
8946 return "DW_AT_body_end";
8947 case DW_AT_GNU_vector
:
8948 return "DW_AT_GNU_vector";
8949 /* VMS extensions. */
8950 case DW_AT_VMS_rtnbeg_pd_address
:
8951 return "DW_AT_VMS_rtnbeg_pd_address";
8952 /* UPC extension. */
8953 case DW_AT_upc_threads_scaled
:
8954 return "DW_AT_upc_threads_scaled";
8955 /* PGI (STMicroelectronics) extensions. */
8956 case DW_AT_PGI_lbase
:
8957 return "DW_AT_PGI_lbase";
8958 case DW_AT_PGI_soffset
:
8959 return "DW_AT_PGI_soffset";
8960 case DW_AT_PGI_lstride
:
8961 return "DW_AT_PGI_lstride";
8963 return "DW_AT_<unknown>";
8967 /* Convert a DWARF value form code into its string name. */
8970 dwarf_form_name (unsigned form
)
8975 return "DW_FORM_addr";
8976 case DW_FORM_block2
:
8977 return "DW_FORM_block2";
8978 case DW_FORM_block4
:
8979 return "DW_FORM_block4";
8981 return "DW_FORM_data2";
8983 return "DW_FORM_data4";
8985 return "DW_FORM_data8";
8986 case DW_FORM_string
:
8987 return "DW_FORM_string";
8989 return "DW_FORM_block";
8990 case DW_FORM_block1
:
8991 return "DW_FORM_block1";
8993 return "DW_FORM_data1";
8995 return "DW_FORM_flag";
8997 return "DW_FORM_sdata";
8999 return "DW_FORM_strp";
9001 return "DW_FORM_udata";
9002 case DW_FORM_ref_addr
:
9003 return "DW_FORM_ref_addr";
9005 return "DW_FORM_ref1";
9007 return "DW_FORM_ref2";
9009 return "DW_FORM_ref4";
9011 return "DW_FORM_ref8";
9012 case DW_FORM_ref_udata
:
9013 return "DW_FORM_ref_udata";
9014 case DW_FORM_indirect
:
9015 return "DW_FORM_indirect";
9016 case GDB_FORM_cached_string
:
9017 return "GDB_FORM_cached_string";
9019 return "DW_FORM_<unknown>";
9023 /* Convert a DWARF stack opcode into its string name. */
9026 dwarf_stack_op_name (unsigned op
)
9031 return "DW_OP_addr";
9033 return "DW_OP_deref";
9035 return "DW_OP_const1u";
9037 return "DW_OP_const1s";
9039 return "DW_OP_const2u";
9041 return "DW_OP_const2s";
9043 return "DW_OP_const4u";
9045 return "DW_OP_const4s";
9047 return "DW_OP_const8u";
9049 return "DW_OP_const8s";
9051 return "DW_OP_constu";
9053 return "DW_OP_consts";
9057 return "DW_OP_drop";
9059 return "DW_OP_over";
9061 return "DW_OP_pick";
9063 return "DW_OP_swap";
9067 return "DW_OP_xderef";
9075 return "DW_OP_minus";
9087 return "DW_OP_plus";
9088 case DW_OP_plus_uconst
:
9089 return "DW_OP_plus_uconst";
9095 return "DW_OP_shra";
9113 return "DW_OP_skip";
9115 return "DW_OP_lit0";
9117 return "DW_OP_lit1";
9119 return "DW_OP_lit2";
9121 return "DW_OP_lit3";
9123 return "DW_OP_lit4";
9125 return "DW_OP_lit5";
9127 return "DW_OP_lit6";
9129 return "DW_OP_lit7";
9131 return "DW_OP_lit8";
9133 return "DW_OP_lit9";
9135 return "DW_OP_lit10";
9137 return "DW_OP_lit11";
9139 return "DW_OP_lit12";
9141 return "DW_OP_lit13";
9143 return "DW_OP_lit14";
9145 return "DW_OP_lit15";
9147 return "DW_OP_lit16";
9149 return "DW_OP_lit17";
9151 return "DW_OP_lit18";
9153 return "DW_OP_lit19";
9155 return "DW_OP_lit20";
9157 return "DW_OP_lit21";
9159 return "DW_OP_lit22";
9161 return "DW_OP_lit23";
9163 return "DW_OP_lit24";
9165 return "DW_OP_lit25";
9167 return "DW_OP_lit26";
9169 return "DW_OP_lit27";
9171 return "DW_OP_lit28";
9173 return "DW_OP_lit29";
9175 return "DW_OP_lit30";
9177 return "DW_OP_lit31";
9179 return "DW_OP_reg0";
9181 return "DW_OP_reg1";
9183 return "DW_OP_reg2";
9185 return "DW_OP_reg3";
9187 return "DW_OP_reg4";
9189 return "DW_OP_reg5";
9191 return "DW_OP_reg6";
9193 return "DW_OP_reg7";
9195 return "DW_OP_reg8";
9197 return "DW_OP_reg9";
9199 return "DW_OP_reg10";
9201 return "DW_OP_reg11";
9203 return "DW_OP_reg12";
9205 return "DW_OP_reg13";
9207 return "DW_OP_reg14";
9209 return "DW_OP_reg15";
9211 return "DW_OP_reg16";
9213 return "DW_OP_reg17";
9215 return "DW_OP_reg18";
9217 return "DW_OP_reg19";
9219 return "DW_OP_reg20";
9221 return "DW_OP_reg21";
9223 return "DW_OP_reg22";
9225 return "DW_OP_reg23";
9227 return "DW_OP_reg24";
9229 return "DW_OP_reg25";
9231 return "DW_OP_reg26";
9233 return "DW_OP_reg27";
9235 return "DW_OP_reg28";
9237 return "DW_OP_reg29";
9239 return "DW_OP_reg30";
9241 return "DW_OP_reg31";
9243 return "DW_OP_breg0";
9245 return "DW_OP_breg1";
9247 return "DW_OP_breg2";
9249 return "DW_OP_breg3";
9251 return "DW_OP_breg4";
9253 return "DW_OP_breg5";
9255 return "DW_OP_breg6";
9257 return "DW_OP_breg7";
9259 return "DW_OP_breg8";
9261 return "DW_OP_breg9";
9263 return "DW_OP_breg10";
9265 return "DW_OP_breg11";
9267 return "DW_OP_breg12";
9269 return "DW_OP_breg13";
9271 return "DW_OP_breg14";
9273 return "DW_OP_breg15";
9275 return "DW_OP_breg16";
9277 return "DW_OP_breg17";
9279 return "DW_OP_breg18";
9281 return "DW_OP_breg19";
9283 return "DW_OP_breg20";
9285 return "DW_OP_breg21";
9287 return "DW_OP_breg22";
9289 return "DW_OP_breg23";
9291 return "DW_OP_breg24";
9293 return "DW_OP_breg25";
9295 return "DW_OP_breg26";
9297 return "DW_OP_breg27";
9299 return "DW_OP_breg28";
9301 return "DW_OP_breg29";
9303 return "DW_OP_breg30";
9305 return "DW_OP_breg31";
9307 return "DW_OP_regx";
9309 return "DW_OP_fbreg";
9311 return "DW_OP_bregx";
9313 return "DW_OP_piece";
9314 case DW_OP_deref_size
:
9315 return "DW_OP_deref_size";
9316 case DW_OP_xderef_size
:
9317 return "DW_OP_xderef_size";
9320 /* DWARF 3 extensions. */
9321 case DW_OP_push_object_address
:
9322 return "DW_OP_push_object_address";
9324 return "DW_OP_call2";
9326 return "DW_OP_call4";
9327 case DW_OP_call_ref
:
9328 return "DW_OP_call_ref";
9329 /* GNU extensions. */
9330 case DW_OP_form_tls_address
:
9331 return "DW_OP_form_tls_address";
9332 case DW_OP_call_frame_cfa
:
9333 return "DW_OP_call_frame_cfa";
9334 case DW_OP_bit_piece
:
9335 return "DW_OP_bit_piece";
9336 case DW_OP_GNU_push_tls_address
:
9337 return "DW_OP_GNU_push_tls_address";
9338 case DW_OP_GNU_uninit
:
9339 return "DW_OP_GNU_uninit";
9340 /* HP extensions. */
9341 case DW_OP_HP_is_value
:
9342 return "DW_OP_HP_is_value";
9343 case DW_OP_HP_fltconst4
:
9344 return "DW_OP_HP_fltconst4";
9345 case DW_OP_HP_fltconst8
:
9346 return "DW_OP_HP_fltconst8";
9347 case DW_OP_HP_mod_range
:
9348 return "DW_OP_HP_mod_range";
9349 case DW_OP_HP_unmod_range
:
9350 return "DW_OP_HP_unmod_range";
9352 return "DW_OP_HP_tls";
9354 return "OP_<unknown>";
9359 dwarf_bool_name (unsigned mybool
)
9367 /* Convert a DWARF type code into its string name. */
9370 dwarf_type_encoding_name (unsigned enc
)
9375 return "DW_ATE_void";
9376 case DW_ATE_address
:
9377 return "DW_ATE_address";
9378 case DW_ATE_boolean
:
9379 return "DW_ATE_boolean";
9380 case DW_ATE_complex_float
:
9381 return "DW_ATE_complex_float";
9383 return "DW_ATE_float";
9385 return "DW_ATE_signed";
9386 case DW_ATE_signed_char
:
9387 return "DW_ATE_signed_char";
9388 case DW_ATE_unsigned
:
9389 return "DW_ATE_unsigned";
9390 case DW_ATE_unsigned_char
:
9391 return "DW_ATE_unsigned_char";
9393 case DW_ATE_imaginary_float
:
9394 return "DW_ATE_imaginary_float";
9395 case DW_ATE_packed_decimal
:
9396 return "DW_ATE_packed_decimal";
9397 case DW_ATE_numeric_string
:
9398 return "DW_ATE_numeric_string";
9400 return "DW_ATE_edited";
9401 case DW_ATE_signed_fixed
:
9402 return "DW_ATE_signed_fixed";
9403 case DW_ATE_unsigned_fixed
:
9404 return "DW_ATE_unsigned_fixed";
9405 case DW_ATE_decimal_float
:
9406 return "DW_ATE_decimal_float";
9407 /* HP extensions. */
9408 case DW_ATE_HP_float80
:
9409 return "DW_ATE_HP_float80";
9410 case DW_ATE_HP_complex_float80
:
9411 return "DW_ATE_HP_complex_float80";
9412 case DW_ATE_HP_float128
:
9413 return "DW_ATE_HP_float128";
9414 case DW_ATE_HP_complex_float128
:
9415 return "DW_ATE_HP_complex_float128";
9416 case DW_ATE_HP_floathpintel
:
9417 return "DW_ATE_HP_floathpintel";
9418 case DW_ATE_HP_imaginary_float80
:
9419 return "DW_ATE_HP_imaginary_float80";
9420 case DW_ATE_HP_imaginary_float128
:
9421 return "DW_ATE_HP_imaginary_float128";
9423 return "DW_ATE_<unknown>";
9427 /* Convert a DWARF call frame info operation to its string name. */
9431 dwarf_cfi_name (unsigned cfi_opc
)
9435 case DW_CFA_advance_loc
:
9436 return "DW_CFA_advance_loc";
9438 return "DW_CFA_offset";
9439 case DW_CFA_restore
:
9440 return "DW_CFA_restore";
9442 return "DW_CFA_nop";
9443 case DW_CFA_set_loc
:
9444 return "DW_CFA_set_loc";
9445 case DW_CFA_advance_loc1
:
9446 return "DW_CFA_advance_loc1";
9447 case DW_CFA_advance_loc2
:
9448 return "DW_CFA_advance_loc2";
9449 case DW_CFA_advance_loc4
:
9450 return "DW_CFA_advance_loc4";
9451 case DW_CFA_offset_extended
:
9452 return "DW_CFA_offset_extended";
9453 case DW_CFA_restore_extended
:
9454 return "DW_CFA_restore_extended";
9455 case DW_CFA_undefined
:
9456 return "DW_CFA_undefined";
9457 case DW_CFA_same_value
:
9458 return "DW_CFA_same_value";
9459 case DW_CFA_register
:
9460 return "DW_CFA_register";
9461 case DW_CFA_remember_state
:
9462 return "DW_CFA_remember_state";
9463 case DW_CFA_restore_state
:
9464 return "DW_CFA_restore_state";
9465 case DW_CFA_def_cfa
:
9466 return "DW_CFA_def_cfa";
9467 case DW_CFA_def_cfa_register
:
9468 return "DW_CFA_def_cfa_register";
9469 case DW_CFA_def_cfa_offset
:
9470 return "DW_CFA_def_cfa_offset";
9472 case DW_CFA_def_cfa_expression
:
9473 return "DW_CFA_def_cfa_expression";
9474 case DW_CFA_expression
:
9475 return "DW_CFA_expression";
9476 case DW_CFA_offset_extended_sf
:
9477 return "DW_CFA_offset_extended_sf";
9478 case DW_CFA_def_cfa_sf
:
9479 return "DW_CFA_def_cfa_sf";
9480 case DW_CFA_def_cfa_offset_sf
:
9481 return "DW_CFA_def_cfa_offset_sf";
9482 case DW_CFA_val_offset
:
9483 return "DW_CFA_val_offset";
9484 case DW_CFA_val_offset_sf
:
9485 return "DW_CFA_val_offset_sf";
9486 case DW_CFA_val_expression
:
9487 return "DW_CFA_val_expression";
9488 /* SGI/MIPS specific. */
9489 case DW_CFA_MIPS_advance_loc8
:
9490 return "DW_CFA_MIPS_advance_loc8";
9491 /* GNU extensions. */
9492 case DW_CFA_GNU_window_save
:
9493 return "DW_CFA_GNU_window_save";
9494 case DW_CFA_GNU_args_size
:
9495 return "DW_CFA_GNU_args_size";
9496 case DW_CFA_GNU_negative_offset_extended
:
9497 return "DW_CFA_GNU_negative_offset_extended";
9499 return "DW_CFA_<unknown>";
9505 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
9509 print_spaces (indent
, f
);
9510 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset 0x%x)\n",
9511 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
9513 if (die
->parent
!= NULL
)
9515 print_spaces (indent
, f
);
9516 fprintf_unfiltered (f
, " parent at offset: 0x%x\n",
9517 die
->parent
->offset
);
9520 print_spaces (indent
, f
);
9521 fprintf_unfiltered (f
, " has children: %s\n",
9522 dwarf_bool_name (die
->child
!= NULL
));
9524 print_spaces (indent
, f
);
9525 fprintf_unfiltered (f
, " attributes:\n");
9527 for (i
= 0; i
< die
->num_attrs
; ++i
)
9529 print_spaces (indent
, f
);
9530 fprintf_unfiltered (f
, " %s (%s) ",
9531 dwarf_attr_name (die
->attrs
[i
].name
),
9532 dwarf_form_name (die
->attrs
[i
].form
));
9534 switch (die
->attrs
[i
].form
)
9536 case DW_FORM_ref_addr
:
9538 fprintf_unfiltered (f
, "address: ");
9539 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
9541 case DW_FORM_block2
:
9542 case DW_FORM_block4
:
9544 case DW_FORM_block1
:
9545 fprintf_unfiltered (f
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
9550 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
9551 (long) (DW_ADDR (&die
->attrs
[i
])));
9559 fprintf_unfiltered (f
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
9561 case DW_FORM_string
:
9563 case GDB_FORM_cached_string
:
9564 fprintf_unfiltered (f
, "string: \"%s\"",
9565 DW_STRING (&die
->attrs
[i
])
9566 ? DW_STRING (&die
->attrs
[i
]) : "");
9569 if (DW_UNSND (&die
->attrs
[i
]))
9570 fprintf_unfiltered (f
, "flag: TRUE");
9572 fprintf_unfiltered (f
, "flag: FALSE");
9574 case DW_FORM_indirect
:
9575 /* the reader will have reduced the indirect form to
9576 the "base form" so this form should not occur */
9577 fprintf_unfiltered (f
, "unexpected attribute form: DW_FORM_indirect");
9580 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
9581 die
->attrs
[i
].form
);
9584 fprintf_unfiltered (f
, "\n");
9589 dump_die_for_error (struct die_info
*die
)
9591 dump_die_shallow (gdb_stderr
, 0, die
);
9595 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
9597 int indent
= level
* 4;
9599 gdb_assert (die
!= NULL
);
9601 if (level
>= max_level
)
9604 dump_die_shallow (f
, indent
, die
);
9606 if (die
->child
!= NULL
)
9608 print_spaces (indent
, f
);
9609 fprintf_unfiltered (f
, " Children:");
9610 if (level
+ 1 < max_level
)
9612 fprintf_unfiltered (f
, "\n");
9613 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
9617 fprintf_unfiltered (f
, " [not printed, max nesting level reached]\n");
9621 if (die
->sibling
!= NULL
&& level
> 0)
9623 dump_die_1 (f
, level
, max_level
, die
->sibling
);
9627 /* This is called from the pdie macro in gdbinit.in.
9628 It's not static so gcc will keep a copy callable from gdb. */
9631 dump_die (struct die_info
*die
, int max_level
)
9633 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
9637 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
9641 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
, die
->offset
, INSERT
);
9647 dwarf2_get_ref_die_offset (struct attribute
*attr
)
9649 unsigned int result
= 0;
9653 case DW_FORM_ref_addr
:
9658 case DW_FORM_ref_udata
:
9659 result
= DW_ADDR (attr
);
9662 complaint (&symfile_complaints
,
9663 _("unsupported die ref attribute form: '%s'"),
9664 dwarf_form_name (attr
->form
));
9669 /* Return the constant value held by the given attribute. Return -1
9670 if the value held by the attribute is not constant. */
9673 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
9675 if (attr
->form
== DW_FORM_sdata
)
9676 return DW_SND (attr
);
9677 else if (attr
->form
== DW_FORM_udata
9678 || attr
->form
== DW_FORM_data1
9679 || attr
->form
== DW_FORM_data2
9680 || attr
->form
== DW_FORM_data4
9681 || attr
->form
== DW_FORM_data8
)
9682 return DW_UNSND (attr
);
9685 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
9686 dwarf_form_name (attr
->form
));
9687 return default_value
;
9691 /* THIS_CU has a reference to PER_CU. If necessary, load the new compilation
9692 unit and add it to our queue. */
9695 maybe_queue_comp_unit (struct dwarf2_cu
*this_cu
,
9696 struct dwarf2_per_cu_data
*per_cu
)
9698 /* Mark the dependence relation so that we don't flush PER_CU
9700 dwarf2_add_dependence (this_cu
, per_cu
);
9702 /* If it's already on the queue, we have nothing to do. */
9706 /* If the compilation unit is already loaded, just mark it as
9708 if (per_cu
->cu
!= NULL
)
9710 per_cu
->cu
->last_used
= 0;
9714 /* Add it to the queue. */
9715 queue_comp_unit (per_cu
, this_cu
->objfile
);
9718 /* Follow reference attribute ATTR of SRC_DIE.
9719 On entry *REF_CU is the CU of SRC_DIE.
9720 On exit *REF_CU is the CU of the result. */
9722 static struct die_info
*
9723 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
9724 struct dwarf2_cu
**ref_cu
)
9726 struct die_info
*die
;
9727 unsigned int offset
;
9728 struct die_info temp_die
;
9729 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
9731 offset
= dwarf2_get_ref_die_offset (attr
);
9733 if (! offset_in_cu_p (&cu
->header
, offset
))
9735 struct dwarf2_per_cu_data
*per_cu
;
9736 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
9738 /* If necessary, add it to the queue and load its DIEs. */
9739 maybe_queue_comp_unit (cu
, per_cu
);
9741 target_cu
= per_cu
->cu
;
9746 *ref_cu
= target_cu
;
9747 temp_die
.offset
= offset
;
9748 die
= htab_find_with_hash (target_cu
->die_hash
, &temp_die
, offset
);
9752 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9753 "at 0x%lx [in module %s]"),
9754 (long) offset
, (long) src_die
->offset
, cu
->objfile
->name
);
9757 /* Decode simple location descriptions.
9758 Given a pointer to a dwarf block that defines a location, compute
9759 the location and return the value.
9761 NOTE drow/2003-11-18: This function is called in two situations
9762 now: for the address of static or global variables (partial symbols
9763 only) and for offsets into structures which are expected to be
9764 (more or less) constant. The partial symbol case should go away,
9765 and only the constant case should remain. That will let this
9766 function complain more accurately. A few special modes are allowed
9767 without complaint for global variables (for instance, global
9768 register values and thread-local values).
9770 A location description containing no operations indicates that the
9771 object is optimized out. The return value is 0 for that case.
9772 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9773 callers will only want a very basic result and this can become a
9776 Note that stack[0] is unused except as a default error return.
9777 Note that stack overflow is not yet handled. */
9780 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
9782 struct objfile
*objfile
= cu
->objfile
;
9783 struct comp_unit_head
*cu_header
= &cu
->header
;
9785 int size
= blk
->size
;
9786 gdb_byte
*data
= blk
->data
;
9787 CORE_ADDR stack
[64];
9789 unsigned int bytes_read
, unsnd
;
9833 stack
[++stacki
] = op
- DW_OP_lit0
;
9868 stack
[++stacki
] = op
- DW_OP_reg0
;
9870 dwarf2_complex_location_expr_complaint ();
9874 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9876 stack
[++stacki
] = unsnd
;
9878 dwarf2_complex_location_expr_complaint ();
9882 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
9888 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
9893 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
9898 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
9903 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
9908 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
9913 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
9918 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
9924 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
9929 stack
[stacki
+ 1] = stack
[stacki
];
9934 stack
[stacki
- 1] += stack
[stacki
];
9938 case DW_OP_plus_uconst
:
9939 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9944 stack
[stacki
- 1] -= stack
[stacki
];
9949 /* If we're not the last op, then we definitely can't encode
9950 this using GDB's address_class enum. This is valid for partial
9951 global symbols, although the variable's address will be bogus
9954 dwarf2_complex_location_expr_complaint ();
9957 case DW_OP_GNU_push_tls_address
:
9958 /* The top of the stack has the offset from the beginning
9959 of the thread control block at which the variable is located. */
9960 /* Nothing should follow this operator, so the top of stack would
9962 /* This is valid for partial global symbols, but the variable's
9963 address will be bogus in the psymtab. */
9965 dwarf2_complex_location_expr_complaint ();
9968 case DW_OP_GNU_uninit
:
9972 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
9973 dwarf_stack_op_name (op
));
9974 return (stack
[stacki
]);
9977 return (stack
[stacki
]);
9980 /* memory allocation interface */
9982 static struct dwarf_block
*
9983 dwarf_alloc_block (struct dwarf2_cu
*cu
)
9985 struct dwarf_block
*blk
;
9987 blk
= (struct dwarf_block
*)
9988 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
9992 static struct abbrev_info
*
9993 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
9995 struct abbrev_info
*abbrev
;
9997 abbrev
= (struct abbrev_info
*)
9998 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
9999 memset (abbrev
, 0, sizeof (struct abbrev_info
));
10003 static struct die_info
*
10004 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
10006 struct die_info
*die
;
10007 size_t size
= sizeof (struct die_info
);
10010 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
10012 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
10013 memset (die
, 0, sizeof (struct die_info
));
10018 /* Macro support. */
10021 /* Return the full name of file number I in *LH's file name table.
10022 Use COMP_DIR as the name of the current directory of the
10023 compilation. The result is allocated using xmalloc; the caller is
10024 responsible for freeing it. */
10026 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
10028 /* Is the file number a valid index into the line header's file name
10029 table? Remember that file numbers start with one, not zero. */
10030 if (1 <= file
&& file
<= lh
->num_file_names
)
10032 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
10034 if (IS_ABSOLUTE_PATH (fe
->name
))
10035 return xstrdup (fe
->name
);
10043 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
10049 dir_len
= strlen (dir
);
10050 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
10051 strcpy (full_name
, dir
);
10052 full_name
[dir_len
] = '/';
10053 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
10057 return xstrdup (fe
->name
);
10062 /* The compiler produced a bogus file number. We can at least
10063 record the macro definitions made in the file, even if we
10064 won't be able to find the file by name. */
10065 char fake_name
[80];
10066 sprintf (fake_name
, "<bad macro file number %d>", file
);
10068 complaint (&symfile_complaints
,
10069 _("bad file number in macro information (%d)"),
10072 return xstrdup (fake_name
);
10077 static struct macro_source_file
*
10078 macro_start_file (int file
, int line
,
10079 struct macro_source_file
*current_file
,
10080 const char *comp_dir
,
10081 struct line_header
*lh
, struct objfile
*objfile
)
10083 /* The full name of this source file. */
10084 char *full_name
= file_full_name (file
, lh
, comp_dir
);
10086 /* We don't create a macro table for this compilation unit
10087 at all until we actually get a filename. */
10088 if (! pending_macros
)
10089 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
10090 objfile
->macro_cache
);
10092 if (! current_file
)
10093 /* If we have no current file, then this must be the start_file
10094 directive for the compilation unit's main source file. */
10095 current_file
= macro_set_main (pending_macros
, full_name
);
10097 current_file
= macro_include (current_file
, line
, full_name
);
10101 return current_file
;
10105 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
10106 followed by a null byte. */
10108 copy_string (const char *buf
, int len
)
10110 char *s
= xmalloc (len
+ 1);
10111 memcpy (s
, buf
, len
);
10118 static const char *
10119 consume_improper_spaces (const char *p
, const char *body
)
10123 complaint (&symfile_complaints
,
10124 _("macro definition contains spaces in formal argument list:\n`%s'"),
10136 parse_macro_definition (struct macro_source_file
*file
, int line
,
10141 /* The body string takes one of two forms. For object-like macro
10142 definitions, it should be:
10144 <macro name> " " <definition>
10146 For function-like macro definitions, it should be:
10148 <macro name> "() " <definition>
10150 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
10152 Spaces may appear only where explicitly indicated, and in the
10155 The Dwarf 2 spec says that an object-like macro's name is always
10156 followed by a space, but versions of GCC around March 2002 omit
10157 the space when the macro's definition is the empty string.
10159 The Dwarf 2 spec says that there should be no spaces between the
10160 formal arguments in a function-like macro's formal argument list,
10161 but versions of GCC around March 2002 include spaces after the
10165 /* Find the extent of the macro name. The macro name is terminated
10166 by either a space or null character (for an object-like macro) or
10167 an opening paren (for a function-like macro). */
10168 for (p
= body
; *p
; p
++)
10169 if (*p
== ' ' || *p
== '(')
10172 if (*p
== ' ' || *p
== '\0')
10174 /* It's an object-like macro. */
10175 int name_len
= p
- body
;
10176 char *name
= copy_string (body
, name_len
);
10177 const char *replacement
;
10180 replacement
= body
+ name_len
+ 1;
10183 dwarf2_macro_malformed_definition_complaint (body
);
10184 replacement
= body
+ name_len
;
10187 macro_define_object (file
, line
, name
, replacement
);
10191 else if (*p
== '(')
10193 /* It's a function-like macro. */
10194 char *name
= copy_string (body
, p
- body
);
10197 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
10201 p
= consume_improper_spaces (p
, body
);
10203 /* Parse the formal argument list. */
10204 while (*p
&& *p
!= ')')
10206 /* Find the extent of the current argument name. */
10207 const char *arg_start
= p
;
10209 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
10212 if (! *p
|| p
== arg_start
)
10213 dwarf2_macro_malformed_definition_complaint (body
);
10216 /* Make sure argv has room for the new argument. */
10217 if (argc
>= argv_size
)
10220 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
10223 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
10226 p
= consume_improper_spaces (p
, body
);
10228 /* Consume the comma, if present. */
10233 p
= consume_improper_spaces (p
, body
);
10242 /* Perfectly formed definition, no complaints. */
10243 macro_define_function (file
, line
, name
,
10244 argc
, (const char **) argv
,
10246 else if (*p
== '\0')
10248 /* Complain, but do define it. */
10249 dwarf2_macro_malformed_definition_complaint (body
);
10250 macro_define_function (file
, line
, name
,
10251 argc
, (const char **) argv
,
10255 /* Just complain. */
10256 dwarf2_macro_malformed_definition_complaint (body
);
10259 /* Just complain. */
10260 dwarf2_macro_malformed_definition_complaint (body
);
10266 for (i
= 0; i
< argc
; i
++)
10272 dwarf2_macro_malformed_definition_complaint (body
);
10277 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
10278 char *comp_dir
, bfd
*abfd
,
10279 struct dwarf2_cu
*cu
)
10281 gdb_byte
*mac_ptr
, *mac_end
;
10282 struct macro_source_file
*current_file
= 0;
10283 enum dwarf_macinfo_record_type macinfo_type
;
10284 int at_commandline
;
10286 if (dwarf2_per_objfile
->macinfo
.buffer
== NULL
)
10288 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
10292 /* First pass: Find the name of the base filename.
10293 This filename is needed in order to process all macros whose definition
10294 (or undefinition) comes from the command line. These macros are defined
10295 before the first DW_MACINFO_start_file entry, and yet still need to be
10296 associated to the base file.
10298 To determine the base file name, we scan the macro definitions until we
10299 reach the first DW_MACINFO_start_file entry. We then initialize
10300 CURRENT_FILE accordingly so that any macro definition found before the
10301 first DW_MACINFO_start_file can still be associated to the base file. */
10303 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
10304 mac_end
= dwarf2_per_objfile
->macinfo
.buffer
10305 + dwarf2_per_objfile
->macinfo
.size
;
10309 /* Do we at least have room for a macinfo type byte? */
10310 if (mac_ptr
>= mac_end
)
10312 /* Complaint is printed during the second pass as GDB will probably
10313 stop the first pass earlier upon finding DW_MACINFO_start_file. */
10317 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
10320 switch (macinfo_type
)
10322 /* A zero macinfo type indicates the end of the macro
10327 case DW_MACINFO_define
:
10328 case DW_MACINFO_undef
:
10329 /* Only skip the data by MAC_PTR. */
10331 unsigned int bytes_read
;
10333 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
10334 mac_ptr
+= bytes_read
;
10335 read_string (abfd
, mac_ptr
, &bytes_read
);
10336 mac_ptr
+= bytes_read
;
10340 case DW_MACINFO_start_file
:
10342 unsigned int bytes_read
;
10345 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
10346 mac_ptr
+= bytes_read
;
10347 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
10348 mac_ptr
+= bytes_read
;
10350 current_file
= macro_start_file (file
, line
, current_file
, comp_dir
,
10355 case DW_MACINFO_end_file
:
10356 /* No data to skip by MAC_PTR. */
10359 case DW_MACINFO_vendor_ext
:
10360 /* Only skip the data by MAC_PTR. */
10362 unsigned int bytes_read
;
10364 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
10365 mac_ptr
+= bytes_read
;
10366 read_string (abfd
, mac_ptr
, &bytes_read
);
10367 mac_ptr
+= bytes_read
;
10374 } while (macinfo_type
!= 0 && current_file
== NULL
);
10376 /* Second pass: Process all entries.
10378 Use the AT_COMMAND_LINE flag to determine whether we are still processing
10379 command-line macro definitions/undefinitions. This flag is unset when we
10380 reach the first DW_MACINFO_start_file entry. */
10382 mac_ptr
= dwarf2_per_objfile
->macinfo
.buffer
+ offset
;
10384 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
10385 GDB is still reading the definitions from command line. First
10386 DW_MACINFO_start_file will need to be ignored as it was already executed
10387 to create CURRENT_FILE for the main source holding also the command line
10388 definitions. On first met DW_MACINFO_start_file this flag is reset to
10389 normally execute all the remaining DW_MACINFO_start_file macinfos. */
10391 at_commandline
= 1;
10395 /* Do we at least have room for a macinfo type byte? */
10396 if (mac_ptr
>= mac_end
)
10398 dwarf2_macros_too_long_complaint ();
10402 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
10405 switch (macinfo_type
)
10407 /* A zero macinfo type indicates the end of the macro
10412 case DW_MACINFO_define
:
10413 case DW_MACINFO_undef
:
10415 unsigned int bytes_read
;
10419 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
10420 mac_ptr
+= bytes_read
;
10421 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
10422 mac_ptr
+= bytes_read
;
10424 if (! current_file
)
10426 /* DWARF violation as no main source is present. */
10427 complaint (&symfile_complaints
,
10428 _("debug info with no main source gives macro %s "
10431 DW_MACINFO_define
? _("definition") : macinfo_type
==
10432 DW_MACINFO_undef
? _("undefinition") :
10433 "something-or-other", line
, body
);
10436 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
10437 complaint (&symfile_complaints
,
10438 _("debug info gives %s macro %s with %s line %d: %s"),
10439 at_commandline
? _("command-line") : _("in-file"),
10441 DW_MACINFO_define
? _("definition") : macinfo_type
==
10442 DW_MACINFO_undef
? _("undefinition") :
10443 "something-or-other",
10444 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
10446 if (macinfo_type
== DW_MACINFO_define
)
10447 parse_macro_definition (current_file
, line
, body
);
10448 else if (macinfo_type
== DW_MACINFO_undef
)
10449 macro_undef (current_file
, line
, body
);
10453 case DW_MACINFO_start_file
:
10455 unsigned int bytes_read
;
10458 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
10459 mac_ptr
+= bytes_read
;
10460 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
10461 mac_ptr
+= bytes_read
;
10463 if ((line
== 0 && !at_commandline
) || (line
!= 0 && at_commandline
))
10464 complaint (&symfile_complaints
,
10465 _("debug info gives source %d included "
10466 "from %s at %s line %d"),
10467 file
, at_commandline
? _("command-line") : _("file"),
10468 line
== 0 ? _("zero") : _("non-zero"), line
);
10470 if (at_commandline
)
10472 /* This DW_MACINFO_start_file was executed in the pass one. */
10473 at_commandline
= 0;
10476 current_file
= macro_start_file (file
, line
,
10477 current_file
, comp_dir
,
10482 case DW_MACINFO_end_file
:
10483 if (! current_file
)
10484 complaint (&symfile_complaints
,
10485 _("macro debug info has an unmatched `close_file' directive"));
10488 current_file
= current_file
->included_by
;
10489 if (! current_file
)
10491 enum dwarf_macinfo_record_type next_type
;
10493 /* GCC circa March 2002 doesn't produce the zero
10494 type byte marking the end of the compilation
10495 unit. Complain if it's not there, but exit no
10498 /* Do we at least have room for a macinfo type byte? */
10499 if (mac_ptr
>= mac_end
)
10501 dwarf2_macros_too_long_complaint ();
10505 /* We don't increment mac_ptr here, so this is just
10507 next_type
= read_1_byte (abfd
, mac_ptr
);
10508 if (next_type
!= 0)
10509 complaint (&symfile_complaints
,
10510 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
10517 case DW_MACINFO_vendor_ext
:
10519 unsigned int bytes_read
;
10523 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
10524 mac_ptr
+= bytes_read
;
10525 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
10526 mac_ptr
+= bytes_read
;
10528 /* We don't recognize any vendor extensions. */
10532 } while (macinfo_type
!= 0);
10535 /* Check if the attribute's form is a DW_FORM_block*
10536 if so return true else false. */
10538 attr_form_is_block (struct attribute
*attr
)
10540 return (attr
== NULL
? 0 :
10541 attr
->form
== DW_FORM_block1
10542 || attr
->form
== DW_FORM_block2
10543 || attr
->form
== DW_FORM_block4
10544 || attr
->form
== DW_FORM_block
);
10547 /* Return non-zero if ATTR's value is a section offset --- classes
10548 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
10549 You may use DW_UNSND (attr) to retrieve such offsets.
10551 Section 7.5.4, "Attribute Encodings", explains that no attribute
10552 may have a value that belongs to more than one of these classes; it
10553 would be ambiguous if we did, because we use the same forms for all
10556 attr_form_is_section_offset (struct attribute
*attr
)
10558 return (attr
->form
== DW_FORM_data4
10559 || attr
->form
== DW_FORM_data8
);
10563 /* Return non-zero if ATTR's value falls in the 'constant' class, or
10564 zero otherwise. When this function returns true, you can apply
10565 dwarf2_get_attr_constant_value to it.
10567 However, note that for some attributes you must check
10568 attr_form_is_section_offset before using this test. DW_FORM_data4
10569 and DW_FORM_data8 are members of both the constant class, and of
10570 the classes that contain offsets into other debug sections
10571 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
10572 that, if an attribute's can be either a constant or one of the
10573 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
10574 taken as section offsets, not constants. */
10576 attr_form_is_constant (struct attribute
*attr
)
10578 switch (attr
->form
)
10580 case DW_FORM_sdata
:
10581 case DW_FORM_udata
:
10582 case DW_FORM_data1
:
10583 case DW_FORM_data2
:
10584 case DW_FORM_data4
:
10585 case DW_FORM_data8
:
10593 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
10594 struct dwarf2_cu
*cu
)
10596 if (attr_form_is_section_offset (attr
)
10597 /* ".debug_loc" may not exist at all, or the offset may be outside
10598 the section. If so, fall through to the complaint in the
10600 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc
.size
)
10602 struct dwarf2_loclist_baton
*baton
;
10604 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
10605 sizeof (struct dwarf2_loclist_baton
));
10606 baton
->per_cu
= cu
->per_cu
;
10607 gdb_assert (baton
->per_cu
);
10609 /* We don't know how long the location list is, but make sure we
10610 don't run off the edge of the section. */
10611 baton
->size
= dwarf2_per_objfile
->loc
.size
- DW_UNSND (attr
);
10612 baton
->data
= dwarf2_per_objfile
->loc
.buffer
+ DW_UNSND (attr
);
10613 baton
->base_address
= cu
->base_address
;
10614 if (cu
->base_known
== 0)
10615 complaint (&symfile_complaints
,
10616 _("Location list used without specifying the CU base address."));
10618 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_loclist_funcs
;
10619 SYMBOL_LOCATION_BATON (sym
) = baton
;
10623 struct dwarf2_locexpr_baton
*baton
;
10625 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
10626 sizeof (struct dwarf2_locexpr_baton
));
10627 baton
->per_cu
= cu
->per_cu
;
10628 gdb_assert (baton
->per_cu
);
10630 if (attr_form_is_block (attr
))
10632 /* Note that we're just copying the block's data pointer
10633 here, not the actual data. We're still pointing into the
10634 info_buffer for SYM's objfile; right now we never release
10635 that buffer, but when we do clean up properly this may
10637 baton
->size
= DW_BLOCK (attr
)->size
;
10638 baton
->data
= DW_BLOCK (attr
)->data
;
10642 dwarf2_invalid_attrib_class_complaint ("location description",
10643 SYMBOL_NATURAL_NAME (sym
));
10645 baton
->data
= NULL
;
10648 SYMBOL_COMPUTED_OPS (sym
) = &dwarf2_locexpr_funcs
;
10649 SYMBOL_LOCATION_BATON (sym
) = baton
;
10653 /* Return the OBJFILE associated with the compilation unit CU. */
10656 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
10658 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
10660 /* Return the master objfile, so that we can report and look up the
10661 correct file containing this variable. */
10662 if (objfile
->separate_debug_objfile_backlink
)
10663 objfile
= objfile
->separate_debug_objfile_backlink
;
10668 /* Return the address size given in the compilation unit header for CU. */
10671 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
10674 return per_cu
->cu
->header
.addr_size
;
10677 /* If the CU is not currently read in, we re-read its header. */
10678 struct objfile
*objfile
= per_cu
->psymtab
->objfile
;
10679 struct dwarf2_per_objfile
*per_objfile
10680 = objfile_data (objfile
, dwarf2_objfile_data_key
);
10681 gdb_byte
*info_ptr
= per_objfile
->info
.buffer
+ per_cu
->offset
;
10683 struct comp_unit_head cu_header
;
10684 memset (&cu_header
, 0, sizeof cu_header
);
10685 read_comp_unit_head (&cu_header
, info_ptr
, objfile
->obfd
);
10686 return cu_header
.addr_size
;
10690 /* Locate the compilation unit from CU's objfile which contains the
10691 DIE at OFFSET. Raises an error on failure. */
10693 static struct dwarf2_per_cu_data
*
10694 dwarf2_find_containing_comp_unit (unsigned int offset
,
10695 struct objfile
*objfile
)
10697 struct dwarf2_per_cu_data
*this_cu
;
10701 high
= dwarf2_per_objfile
->n_comp_units
- 1;
10704 int mid
= low
+ (high
- low
) / 2;
10705 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
10710 gdb_assert (low
== high
);
10711 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
10714 error (_("Dwarf Error: could not find partial DIE containing "
10715 "offset 0x%lx [in module %s]"),
10716 (long) offset
, bfd_get_filename (objfile
->obfd
));
10718 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
10719 return dwarf2_per_objfile
->all_comp_units
[low
-1];
10723 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
10724 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
10725 && offset
>= this_cu
->offset
+ this_cu
->length
)
10726 error (_("invalid dwarf2 offset %u"), offset
);
10727 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
10732 /* Locate the compilation unit from OBJFILE which is located at exactly
10733 OFFSET. Raises an error on failure. */
10735 static struct dwarf2_per_cu_data
*
10736 dwarf2_find_comp_unit (unsigned int offset
, struct objfile
*objfile
)
10738 struct dwarf2_per_cu_data
*this_cu
;
10739 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
10740 if (this_cu
->offset
!= offset
)
10741 error (_("no compilation unit with offset %u."), offset
);
10745 /* Release one cached compilation unit, CU. We unlink it from the tree
10746 of compilation units, but we don't remove it from the read_in_chain;
10747 the caller is responsible for that. */
10750 free_one_comp_unit (void *data
)
10752 struct dwarf2_cu
*cu
= data
;
10754 if (cu
->per_cu
!= NULL
)
10755 cu
->per_cu
->cu
= NULL
;
10758 obstack_free (&cu
->comp_unit_obstack
, NULL
);
10763 /* This cleanup function is passed the address of a dwarf2_cu on the stack
10764 when we're finished with it. We can't free the pointer itself, but be
10765 sure to unlink it from the cache. Also release any associated storage
10766 and perform cache maintenance.
10768 Only used during partial symbol parsing. */
10771 free_stack_comp_unit (void *data
)
10773 struct dwarf2_cu
*cu
= data
;
10775 obstack_free (&cu
->comp_unit_obstack
, NULL
);
10776 cu
->partial_dies
= NULL
;
10778 if (cu
->per_cu
!= NULL
)
10780 /* This compilation unit is on the stack in our caller, so we
10781 should not xfree it. Just unlink it. */
10782 cu
->per_cu
->cu
= NULL
;
10785 /* If we had a per-cu pointer, then we may have other compilation
10786 units loaded, so age them now. */
10787 age_cached_comp_units ();
10791 /* Free all cached compilation units. */
10794 free_cached_comp_units (void *data
)
10796 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10798 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10799 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10800 while (per_cu
!= NULL
)
10802 struct dwarf2_per_cu_data
*next_cu
;
10804 next_cu
= per_cu
->cu
->read_in_chain
;
10806 free_one_comp_unit (per_cu
->cu
);
10807 *last_chain
= next_cu
;
10813 /* Increase the age counter on each cached compilation unit, and free
10814 any that are too old. */
10817 age_cached_comp_units (void)
10819 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10821 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
10822 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10823 while (per_cu
!= NULL
)
10825 per_cu
->cu
->last_used
++;
10826 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
10827 dwarf2_mark (per_cu
->cu
);
10828 per_cu
= per_cu
->cu
->read_in_chain
;
10831 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10832 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10833 while (per_cu
!= NULL
)
10835 struct dwarf2_per_cu_data
*next_cu
;
10837 next_cu
= per_cu
->cu
->read_in_chain
;
10839 if (!per_cu
->cu
->mark
)
10841 free_one_comp_unit (per_cu
->cu
);
10842 *last_chain
= next_cu
;
10845 last_chain
= &per_cu
->cu
->read_in_chain
;
10851 /* Remove a single compilation unit from the cache. */
10854 free_one_cached_comp_unit (void *target_cu
)
10856 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
10858 per_cu
= dwarf2_per_objfile
->read_in_chain
;
10859 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
10860 while (per_cu
!= NULL
)
10862 struct dwarf2_per_cu_data
*next_cu
;
10864 next_cu
= per_cu
->cu
->read_in_chain
;
10866 if (per_cu
->cu
== target_cu
)
10868 free_one_comp_unit (per_cu
->cu
);
10869 *last_chain
= next_cu
;
10873 last_chain
= &per_cu
->cu
->read_in_chain
;
10879 /* Release all extra memory associated with OBJFILE. */
10882 dwarf2_free_objfile (struct objfile
*objfile
)
10884 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
10886 if (dwarf2_per_objfile
== NULL
)
10889 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
10890 free_cached_comp_units (NULL
);
10892 /* Everything else should be on the objfile obstack. */
10895 /* A pair of DIE offset and GDB type pointer. We store these
10896 in a hash table separate from the DIEs, and preserve them
10897 when the DIEs are flushed out of cache. */
10899 struct dwarf2_offset_and_type
10901 unsigned int offset
;
10905 /* Hash function for a dwarf2_offset_and_type. */
10908 offset_and_type_hash (const void *item
)
10910 const struct dwarf2_offset_and_type
*ofs
= item
;
10911 return ofs
->offset
;
10914 /* Equality function for a dwarf2_offset_and_type. */
10917 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
10919 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
10920 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
10921 return ofs_lhs
->offset
== ofs_rhs
->offset
;
10924 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10925 table if necessary. For convenience, return TYPE. */
10927 static struct type
*
10928 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10930 struct dwarf2_offset_and_type
**slot
, ofs
;
10932 if (cu
->type_hash
== NULL
)
10934 gdb_assert (cu
->per_cu
!= NULL
);
10935 cu
->per_cu
->type_hash
10936 = htab_create_alloc_ex (cu
->header
.length
/ 24,
10937 offset_and_type_hash
,
10938 offset_and_type_eq
,
10940 &cu
->objfile
->objfile_obstack
,
10941 hashtab_obstack_allocate
,
10942 dummy_obstack_deallocate
);
10943 cu
->type_hash
= cu
->per_cu
->type_hash
;
10946 ofs
.offset
= die
->offset
;
10948 slot
= (struct dwarf2_offset_and_type
**)
10949 htab_find_slot_with_hash (cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
10950 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
10955 /* Find the type for DIE in CU's type_hash, or return NULL if DIE does
10956 not have a saved type. */
10958 static struct type
*
10959 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
10961 struct dwarf2_offset_and_type
*slot
, ofs
;
10962 htab_t type_hash
= cu
->type_hash
;
10964 if (type_hash
== NULL
)
10967 ofs
.offset
= die
->offset
;
10968 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
10975 /* Add a dependence relationship from CU to REF_PER_CU. */
10978 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
10979 struct dwarf2_per_cu_data
*ref_per_cu
)
10983 if (cu
->dependencies
== NULL
)
10985 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
10986 NULL
, &cu
->comp_unit_obstack
,
10987 hashtab_obstack_allocate
,
10988 dummy_obstack_deallocate
);
10990 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
10992 *slot
= ref_per_cu
;
10995 /* Subroutine of dwarf2_mark to pass to htab_traverse.
10996 Set the mark field in every compilation unit in the
10997 cache that we must keep because we are keeping CU. */
11000 dwarf2_mark_helper (void **slot
, void *data
)
11002 struct dwarf2_per_cu_data
*per_cu
;
11004 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
11005 if (per_cu
->cu
->mark
)
11007 per_cu
->cu
->mark
= 1;
11009 if (per_cu
->cu
->dependencies
!= NULL
)
11010 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11015 /* Set the mark field in CU and in every other compilation unit in the
11016 cache that we must keep because we are keeping CU. */
11019 dwarf2_mark (struct dwarf2_cu
*cu
)
11024 if (cu
->dependencies
!= NULL
)
11025 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
11029 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
11033 per_cu
->cu
->mark
= 0;
11034 per_cu
= per_cu
->cu
->read_in_chain
;
11038 /* Trivial hash function for partial_die_info: the hash value of a DIE
11039 is its offset in .debug_info for this objfile. */
11042 partial_die_hash (const void *item
)
11044 const struct partial_die_info
*part_die
= item
;
11045 return part_die
->offset
;
11048 /* Trivial comparison function for partial_die_info structures: two DIEs
11049 are equal if they have the same offset. */
11052 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
11054 const struct partial_die_info
*part_die_lhs
= item_lhs
;
11055 const struct partial_die_info
*part_die_rhs
= item_rhs
;
11056 return part_die_lhs
->offset
== part_die_rhs
->offset
;
11059 static struct cmd_list_element
*set_dwarf2_cmdlist
;
11060 static struct cmd_list_element
*show_dwarf2_cmdlist
;
11063 set_dwarf2_cmd (char *args
, int from_tty
)
11065 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
11069 show_dwarf2_cmd (char *args
, int from_tty
)
11071 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
11074 /* If section described by INFO was mmapped, munmap it now. */
11077 munmap_section_buffer (struct dwarf2_section_info
*info
)
11079 if (info
->was_mmapped
)
11082 intptr_t begin
= (intptr_t) info
->buffer
;
11083 intptr_t map_begin
= begin
& ~(pagesize
- 1);
11084 size_t map_length
= info
->size
+ begin
- map_begin
;
11085 gdb_assert (munmap ((void *) map_begin
, map_length
) == 0);
11087 /* Without HAVE_MMAP, we should never be here to begin with. */
11093 /* munmap debug sections for OBJFILE, if necessary. */
11096 dwarf2_per_objfile_cleanup (struct objfile
*objfile
, void *d
)
11098 struct dwarf2_per_objfile
*data
= d
;
11099 munmap_section_buffer (&data
->info
);
11100 munmap_section_buffer (&data
->abbrev
);
11101 munmap_section_buffer (&data
->line
);
11102 munmap_section_buffer (&data
->str
);
11103 munmap_section_buffer (&data
->macinfo
);
11104 munmap_section_buffer (&data
->ranges
);
11105 munmap_section_buffer (&data
->loc
);
11106 munmap_section_buffer (&data
->frame
);
11107 munmap_section_buffer (&data
->eh_frame
);
11110 void _initialize_dwarf2_read (void);
11113 _initialize_dwarf2_read (void)
11115 dwarf2_objfile_data_key
11116 = register_objfile_data_with_cleanup (dwarf2_per_objfile_cleanup
);
11118 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
11119 Set DWARF 2 specific variables.\n\
11120 Configure DWARF 2 variables such as the cache size"),
11121 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
11122 0/*allow-unknown*/, &maintenance_set_cmdlist
);
11124 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
11125 Show DWARF 2 specific variables\n\
11126 Show DWARF 2 variables such as the cache size"),
11127 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
11128 0/*allow-unknown*/, &maintenance_show_cmdlist
);
11130 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
11131 &dwarf2_max_cache_age
, _("\
11132 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
11133 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
11134 A higher limit means that cached compilation units will be stored\n\
11135 in memory longer, and more total memory will be used. Zero disables\n\
11136 caching, which can slow down startup."),
11138 show_dwarf2_max_cache_age
,
11139 &set_dwarf2_cmdlist
,
11140 &show_dwarf2_cmdlist
);
11142 add_setshow_zinteger_cmd ("dwarf2-die", no_class
, &dwarf2_die_debug
, _("\
11143 Set debugging of the dwarf2 DIE reader."), _("\
11144 Show debugging of the dwarf2 DIE reader."), _("\
11145 When enabled (non-zero), DIEs are dumped after they are read in.\n\
11146 The value is the maximum depth to print."),
11149 &setdebuglist
, &showdebuglist
);