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 Free Software Foundation, Inc.
6 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
7 Inc. with support from Florida State University (under contract
8 with the Ada Joint Program Office), and Silicon Graphics, Inc.
9 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
10 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
13 This file is part of GDB.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 3 of the License, or
18 (at your option) any later version.
20 This program is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program. If not, see <http://www.gnu.org/licenses/>. */
33 #include "elf/dwarf2.h"
36 #include "expression.h"
37 #include "filenames.h" /* for DOSish file names */
40 #include "complaints.h"
42 #include "dwarf2expr.h"
43 #include "dwarf2loc.h"
44 #include "cp-support.h"
50 #include "gdb_string.h"
51 #include "gdb_assert.h"
52 #include <sys/types.h>
54 /* A note on memory usage for this file.
56 At the present time, this code reads the debug info sections into
57 the objfile's objfile_obstack. A definite improvement for startup
58 time, on platforms which do not emit relocations for debug
59 sections, would be to use mmap instead. The object's complete
60 debug information is loaded into memory, partly to simplify
61 absolute DIE references.
63 Whether using obstacks or mmap, the sections should remain loaded
64 until the objfile is released, and pointers into the section data
65 can be used for any other data associated to the objfile (symbol
66 names, type names, location expressions to name a few). */
69 /* .debug_info header for a compilation unit
70 Because of alignment constraints, this structure has padding and cannot
71 be mapped directly onto the beginning of the .debug_info section. */
72 typedef struct comp_unit_header
74 unsigned int length
; /* length of the .debug_info
76 unsigned short version
; /* version number -- 2 for DWARF
78 unsigned int abbrev_offset
; /* offset into .debug_abbrev section */
79 unsigned char addr_size
; /* byte size of an address -- 4 */
82 #define _ACTUAL_COMP_UNIT_HEADER_SIZE 11
85 /* .debug_pubnames header
86 Because of alignment constraints, this structure has padding and cannot
87 be mapped directly onto the beginning of the .debug_info section. */
88 typedef struct pubnames_header
90 unsigned int length
; /* length of the .debug_pubnames
92 unsigned char version
; /* version number -- 2 for DWARF
94 unsigned int info_offset
; /* offset into .debug_info section */
95 unsigned int info_size
; /* byte size of .debug_info section
99 #define _ACTUAL_PUBNAMES_HEADER_SIZE 13
101 /* .debug_pubnames header
102 Because of alignment constraints, this structure has padding and cannot
103 be mapped directly onto the beginning of the .debug_info section. */
104 typedef struct aranges_header
106 unsigned int length
; /* byte len of the .debug_aranges
108 unsigned short version
; /* version number -- 2 for DWARF
110 unsigned int info_offset
; /* offset into .debug_info section */
111 unsigned char addr_size
; /* byte size of an address */
112 unsigned char seg_size
; /* byte size of segment descriptor */
115 #define _ACTUAL_ARANGES_HEADER_SIZE 12
117 /* .debug_line statement program prologue
118 Because of alignment constraints, this structure has padding and cannot
119 be mapped directly onto the beginning of the .debug_info section. */
120 typedef struct statement_prologue
122 unsigned int total_length
; /* byte length of the statement
124 unsigned short version
; /* version number -- 2 for DWARF
126 unsigned int prologue_length
; /* # bytes between prologue &
128 unsigned char minimum_instruction_length
; /* byte size of
130 unsigned char default_is_stmt
; /* initial value of is_stmt
133 unsigned char line_range
;
134 unsigned char opcode_base
; /* number assigned to first special
136 unsigned char *standard_opcode_lengths
;
140 static const struct objfile_data
*dwarf2_objfile_data_key
;
142 struct dwarf2_per_objfile
144 /* Sizes of debugging sections. */
145 unsigned int info_size
;
146 unsigned int abbrev_size
;
147 unsigned int line_size
;
148 unsigned int pubnames_size
;
149 unsigned int aranges_size
;
150 unsigned int loc_size
;
151 unsigned int macinfo_size
;
152 unsigned int str_size
;
153 unsigned int ranges_size
;
154 unsigned int frame_size
;
155 unsigned int eh_frame_size
;
157 /* Loaded data from the sections. */
158 gdb_byte
*info_buffer
;
159 gdb_byte
*abbrev_buffer
;
160 gdb_byte
*line_buffer
;
161 gdb_byte
*str_buffer
;
162 gdb_byte
*macinfo_buffer
;
163 gdb_byte
*ranges_buffer
;
164 gdb_byte
*loc_buffer
;
166 /* A list of all the compilation units. This is used to locate
167 the target compilation unit of a particular reference. */
168 struct dwarf2_per_cu_data
**all_comp_units
;
170 /* The number of compilation units in ALL_COMP_UNITS. */
173 /* A chain of compilation units that are currently read in, so that
174 they can be freed later. */
175 struct dwarf2_per_cu_data
*read_in_chain
;
177 /* A flag indicating wether this objfile has a section loaded at a
179 int has_section_at_zero
;
182 static struct dwarf2_per_objfile
*dwarf2_per_objfile
;
184 static asection
*dwarf_info_section
;
185 static asection
*dwarf_abbrev_section
;
186 static asection
*dwarf_line_section
;
187 static asection
*dwarf_pubnames_section
;
188 static asection
*dwarf_aranges_section
;
189 static asection
*dwarf_loc_section
;
190 static asection
*dwarf_macinfo_section
;
191 static asection
*dwarf_str_section
;
192 static asection
*dwarf_ranges_section
;
193 asection
*dwarf_frame_section
;
194 asection
*dwarf_eh_frame_section
;
196 /* names of the debugging sections */
198 #define INFO_SECTION ".debug_info"
199 #define ABBREV_SECTION ".debug_abbrev"
200 #define LINE_SECTION ".debug_line"
201 #define PUBNAMES_SECTION ".debug_pubnames"
202 #define ARANGES_SECTION ".debug_aranges"
203 #define LOC_SECTION ".debug_loc"
204 #define MACINFO_SECTION ".debug_macinfo"
205 #define STR_SECTION ".debug_str"
206 #define RANGES_SECTION ".debug_ranges"
207 #define FRAME_SECTION ".debug_frame"
208 #define EH_FRAME_SECTION ".eh_frame"
210 /* local data types */
212 /* We hold several abbreviation tables in memory at the same time. */
213 #ifndef ABBREV_HASH_SIZE
214 #define ABBREV_HASH_SIZE 121
217 /* The data in a compilation unit header, after target2host
218 translation, looks like this. */
219 struct comp_unit_head
221 unsigned long length
;
223 unsigned int abbrev_offset
;
224 unsigned char addr_size
;
225 unsigned char signed_addr_p
;
227 /* Size of file offsets; either 4 or 8. */
228 unsigned int offset_size
;
230 /* Size of the length field; either 4 or 12. */
231 unsigned int initial_length_size
;
233 /* Offset to the first byte of this compilation unit header in the
234 .debug_info section, for resolving relative reference dies. */
237 /* Pointer to this compilation unit header in the .debug_info
239 gdb_byte
*cu_head_ptr
;
241 /* Pointer to the first die of this compilation unit. This will be
242 the first byte following the compilation unit header. */
243 gdb_byte
*first_die_ptr
;
245 /* Pointer to the next compilation unit header in the program. */
246 struct comp_unit_head
*next
;
248 /* Base address of this compilation unit. */
249 CORE_ADDR base_address
;
251 /* Non-zero if base_address has been set. */
255 /* Fixed size for the DIE hash table. */
256 #ifndef REF_HASH_SIZE
257 #define REF_HASH_SIZE 1021
260 /* Internal state when decoding a particular compilation unit. */
263 /* The objfile containing this compilation unit. */
264 struct objfile
*objfile
;
266 /* The header of the compilation unit.
268 FIXME drow/2003-11-10: Some of the things from the comp_unit_head
269 should logically be moved to the dwarf2_cu structure. */
270 struct comp_unit_head header
;
272 struct function_range
*first_fn
, *last_fn
, *cached_fn
;
274 /* The language we are debugging. */
275 enum language language
;
276 const struct language_defn
*language_defn
;
278 const char *producer
;
280 /* The generic symbol table building routines have separate lists for
281 file scope symbols and all all other scopes (local scopes). So
282 we need to select the right one to pass to add_symbol_to_list().
283 We do it by keeping a pointer to the correct list in list_in_scope.
285 FIXME: The original dwarf code just treated the file scope as the
286 first local scope, and all other local scopes as nested local
287 scopes, and worked fine. Check to see if we really need to
288 distinguish these in buildsym.c. */
289 struct pending
**list_in_scope
;
291 /* Maintain an array of referenced fundamental types for the current
292 compilation unit being read. For DWARF version 1, we have to construct
293 the fundamental types on the fly, since no information about the
294 fundamental types is supplied. Each such fundamental type is created by
295 calling a language dependent routine to create the type, and then a
296 pointer to that type is then placed in the array at the index specified
297 by it's FT_<TYPENAME> value. The array has a fixed size set by the
298 FT_NUM_MEMBERS compile time constant, which is the number of predefined
299 fundamental types gdb knows how to construct. */
300 struct type
*ftypes
[FT_NUM_MEMBERS
]; /* Fundamental types */
302 /* DWARF abbreviation table associated with this compilation unit. */
303 struct abbrev_info
**dwarf2_abbrevs
;
305 /* Storage for the abbrev table. */
306 struct obstack abbrev_obstack
;
308 /* Hash table holding all the loaded partial DIEs. */
311 /* Storage for things with the same lifetime as this read-in compilation
312 unit, including partial DIEs. */
313 struct obstack comp_unit_obstack
;
315 /* When multiple dwarf2_cu structures are living in memory, this field
316 chains them all together, so that they can be released efficiently.
317 We will probably also want a generation counter so that most-recently-used
318 compilation units are cached... */
319 struct dwarf2_per_cu_data
*read_in_chain
;
321 /* Backchain to our per_cu entry if the tree has been built. */
322 struct dwarf2_per_cu_data
*per_cu
;
324 /* How many compilation units ago was this CU last referenced? */
327 /* A hash table of die offsets for following references. */
328 struct die_info
*die_ref_table
[REF_HASH_SIZE
];
330 /* Full DIEs if read in. */
331 struct die_info
*dies
;
333 /* A set of pointers to dwarf2_per_cu_data objects for compilation
334 units referenced by this one. Only set during full symbol processing;
335 partial symbol tables do not have dependencies. */
338 /* Header data from the line table, during full symbol processing. */
339 struct line_header
*line_header
;
341 /* Mark used when releasing cached dies. */
342 unsigned int mark
: 1;
344 /* This flag will be set if this compilation unit might include
345 inter-compilation-unit references. */
346 unsigned int has_form_ref_addr
: 1;
348 /* This flag will be set if this compilation unit includes any
349 DW_TAG_namespace DIEs. If we know that there are explicit
350 DIEs for namespaces, we don't need to try to infer them
351 from mangled names. */
352 unsigned int has_namespace_info
: 1;
355 /* Persistent data held for a compilation unit, even when not
356 processing it. We put a pointer to this structure in the
357 read_symtab_private field of the psymtab. If we encounter
358 inter-compilation-unit references, we also maintain a sorted
359 list of all compilation units. */
361 struct dwarf2_per_cu_data
363 /* The start offset and length of this compilation unit. 2**30-1
364 bytes should suffice to store the length of any compilation unit
365 - if it doesn't, GDB will fall over anyway. */
366 unsigned long offset
;
367 unsigned long length
: 30;
369 /* Flag indicating this compilation unit will be read in before
370 any of the current compilation units are processed. */
371 unsigned long queued
: 1;
373 /* This flag will be set if we need to load absolutely all DIEs
374 for this compilation unit, instead of just the ones we think
375 are interesting. It gets set if we look for a DIE in the
376 hash table and don't find it. */
377 unsigned int load_all_dies
: 1;
379 /* Set iff currently read in. */
380 struct dwarf2_cu
*cu
;
382 /* If full symbols for this CU have been read in, then this field
383 holds a map of DIE offsets to types. It isn't always possible
384 to reconstruct this information later, so we have to preserve
388 /* The partial symbol table associated with this compilation unit,
389 or NULL for partial units (which do not have an associated
391 struct partial_symtab
*psymtab
;
394 /* The line number information for a compilation unit (found in the
395 .debug_line section) begins with a "statement program header",
396 which contains the following information. */
399 unsigned int total_length
;
400 unsigned short version
;
401 unsigned int header_length
;
402 unsigned char minimum_instruction_length
;
403 unsigned char default_is_stmt
;
405 unsigned char line_range
;
406 unsigned char opcode_base
;
408 /* standard_opcode_lengths[i] is the number of operands for the
409 standard opcode whose value is i. This means that
410 standard_opcode_lengths[0] is unused, and the last meaningful
411 element is standard_opcode_lengths[opcode_base - 1]. */
412 unsigned char *standard_opcode_lengths
;
414 /* The include_directories table. NOTE! These strings are not
415 allocated with xmalloc; instead, they are pointers into
416 debug_line_buffer. If you try to free them, `free' will get
418 unsigned int num_include_dirs
, include_dirs_size
;
421 /* The file_names table. NOTE! These strings are not allocated
422 with xmalloc; instead, they are pointers into debug_line_buffer.
423 Don't try to free them directly. */
424 unsigned int num_file_names
, file_names_size
;
428 unsigned int dir_index
;
429 unsigned int mod_time
;
431 int included_p
; /* Non-zero if referenced by the Line Number Program. */
432 struct symtab
*symtab
; /* The associated symbol table, if any. */
435 /* The start and end of the statement program following this
436 header. These point into dwarf2_per_objfile->line_buffer. */
437 gdb_byte
*statement_program_start
, *statement_program_end
;
440 /* When we construct a partial symbol table entry we only
441 need this much information. */
442 struct partial_die_info
444 /* Offset of this DIE. */
447 /* DWARF-2 tag for this DIE. */
448 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
450 /* Language code associated with this DIE. This is only used
451 for the compilation unit DIE. */
452 unsigned int language
: 8;
454 /* Assorted flags describing the data found in this DIE. */
455 unsigned int has_children
: 1;
456 unsigned int is_external
: 1;
457 unsigned int is_declaration
: 1;
458 unsigned int has_type
: 1;
459 unsigned int has_specification
: 1;
460 unsigned int has_stmt_list
: 1;
461 unsigned int has_pc_info
: 1;
463 /* Flag set if the SCOPE field of this structure has been
465 unsigned int scope_set
: 1;
467 /* Flag set if the DIE has a byte_size attribute. */
468 unsigned int has_byte_size
: 1;
470 /* The name of this DIE. Normally the value of DW_AT_name, but
471 sometimes DW_TAG_MIPS_linkage_name or a string computed in some
476 /* The scope to prepend to our children. This is generally
477 allocated on the comp_unit_obstack, so will disappear
478 when this compilation unit leaves the cache. */
481 /* The location description associated with this DIE, if any. */
482 struct dwarf_block
*locdesc
;
484 /* If HAS_PC_INFO, the PC range associated with this DIE. */
488 /* Pointer into the info_buffer pointing at the target of
489 DW_AT_sibling, if any. */
492 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
493 DW_AT_specification (or DW_AT_abstract_origin or
495 unsigned int spec_offset
;
497 /* If HAS_STMT_LIST, the offset of the Line Number Information data. */
498 unsigned int line_offset
;
500 /* Pointers to this DIE's parent, first child, and next sibling,
502 struct partial_die_info
*die_parent
, *die_child
, *die_sibling
;
505 /* This data structure holds the information of an abbrev. */
508 unsigned int number
; /* number identifying abbrev */
509 enum dwarf_tag tag
; /* dwarf tag */
510 unsigned short has_children
; /* boolean */
511 unsigned short num_attrs
; /* number of attributes */
512 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
513 struct abbrev_info
*next
; /* next in chain */
518 enum dwarf_attribute name
;
519 enum dwarf_form form
;
522 /* This data structure holds a complete die structure. */
525 enum dwarf_tag tag
; /* Tag indicating type of die */
526 unsigned int abbrev
; /* Abbrev number */
527 unsigned int offset
; /* Offset in .debug_info section */
528 unsigned int num_attrs
; /* Number of attributes */
529 struct attribute
*attrs
; /* An array of attributes */
530 struct die_info
*next_ref
; /* Next die in ref hash table */
532 /* The dies in a compilation unit form an n-ary tree. PARENT
533 points to this die's parent; CHILD points to the first child of
534 this node; and all the children of a given node are chained
535 together via their SIBLING fields, terminated by a die whose
537 struct die_info
*child
; /* Its first child, if any. */
538 struct die_info
*sibling
; /* Its next sibling, if any. */
539 struct die_info
*parent
; /* Its parent, if any. */
541 struct type
*type
; /* Cached type information */
544 /* Attributes have a name and a value */
547 enum dwarf_attribute name
;
548 enum dwarf_form form
;
552 struct dwarf_block
*blk
;
560 struct function_range
563 CORE_ADDR lowpc
, highpc
;
565 struct function_range
*next
;
568 /* Get at parts of an attribute structure */
570 #define DW_STRING(attr) ((attr)->u.str)
571 #define DW_UNSND(attr) ((attr)->u.unsnd)
572 #define DW_BLOCK(attr) ((attr)->u.blk)
573 #define DW_SND(attr) ((attr)->u.snd)
574 #define DW_ADDR(attr) ((attr)->u.addr)
576 /* Blocks are a bunch of untyped bytes. */
583 #ifndef ATTR_ALLOC_CHUNK
584 #define ATTR_ALLOC_CHUNK 4
587 /* Allocate fields for structs, unions and enums in this size. */
588 #ifndef DW_FIELD_ALLOC_CHUNK
589 #define DW_FIELD_ALLOC_CHUNK 4
592 /* A zeroed version of a partial die for initialization purposes. */
593 static struct partial_die_info zeroed_partial_die
;
595 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
596 but this would require a corresponding change in unpack_field_as_long
598 static int bits_per_byte
= 8;
600 /* The routines that read and process dies for a C struct or C++ class
601 pass lists of data member fields and lists of member function fields
602 in an instance of a field_info structure, as defined below. */
605 /* List of data member and baseclasses fields. */
608 struct nextfield
*next
;
615 /* Number of fields. */
618 /* Number of baseclasses. */
621 /* Set if the accesibility of one of the fields is not public. */
622 int non_public_fields
;
624 /* Member function fields array, entries are allocated in the order they
625 are encountered in the object file. */
628 struct nextfnfield
*next
;
629 struct fn_field fnfield
;
633 /* Member function fieldlist array, contains name of possibly overloaded
634 member function, number of overloaded member functions and a pointer
635 to the head of the member function field chain. */
640 struct nextfnfield
*head
;
644 /* Number of entries in the fnfieldlists array. */
648 /* One item on the queue of compilation units to read in full symbols
650 struct dwarf2_queue_item
652 struct dwarf2_per_cu_data
*per_cu
;
653 struct dwarf2_queue_item
*next
;
656 /* The current queue. */
657 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
659 /* Loaded secondary compilation units are kept in memory until they
660 have not been referenced for the processing of this many
661 compilation units. Set this to zero to disable caching. Cache
662 sizes of up to at least twenty will improve startup time for
663 typical inter-CU-reference binaries, at an obvious memory cost. */
664 static int dwarf2_max_cache_age
= 5;
666 show_dwarf2_max_cache_age (struct ui_file
*file
, int from_tty
,
667 struct cmd_list_element
*c
, const char *value
)
669 fprintf_filtered (file
, _("\
670 The upper bound on the age of cached dwarf2 compilation units is %s.\n"),
675 /* Various complaints about symbol reading that don't abort the process */
678 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
680 complaint (&symfile_complaints
,
681 _("statement list doesn't fit in .debug_line section"));
685 dwarf2_debug_line_missing_file_complaint (void)
687 complaint (&symfile_complaints
,
688 _(".debug_line section has line data without a file"));
692 dwarf2_complex_location_expr_complaint (void)
694 complaint (&symfile_complaints
, _("location expression too complex"));
698 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
701 complaint (&symfile_complaints
,
702 _("const value length mismatch for '%s', got %d, expected %d"), arg1
,
707 dwarf2_macros_too_long_complaint (void)
709 complaint (&symfile_complaints
,
710 _("macro info runs off end of `.debug_macinfo' section"));
714 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
716 complaint (&symfile_complaints
,
717 _("macro debug info contains a malformed macro definition:\n`%s'"),
722 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
724 complaint (&symfile_complaints
,
725 _("invalid attribute class or form for '%s' in '%s'"), arg1
, arg2
);
728 /* local function prototypes */
730 static void dwarf2_locate_sections (bfd
*, asection
*, void *);
733 static void dwarf2_build_psymtabs_easy (struct objfile
*, int);
736 static void dwarf2_create_include_psymtab (char *, struct partial_symtab
*,
739 static void dwarf2_build_include_psymtabs (struct dwarf2_cu
*,
740 struct partial_die_info
*,
741 struct partial_symtab
*);
743 static void dwarf2_build_psymtabs_hard (struct objfile
*, int);
745 static void scan_partial_symbols (struct partial_die_info
*,
746 CORE_ADDR
*, CORE_ADDR
*,
749 static void add_partial_symbol (struct partial_die_info
*,
752 static int pdi_needs_namespace (enum dwarf_tag tag
);
754 static void add_partial_namespace (struct partial_die_info
*pdi
,
755 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
756 struct dwarf2_cu
*cu
);
758 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
759 struct dwarf2_cu
*cu
);
761 static gdb_byte
*locate_pdi_sibling (struct partial_die_info
*orig_pdi
,
764 struct dwarf2_cu
*cu
);
766 static void dwarf2_psymtab_to_symtab (struct partial_symtab
*);
768 static void psymtab_to_symtab_1 (struct partial_symtab
*);
770 gdb_byte
*dwarf2_read_section (struct objfile
*, asection
*);
772 static void dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
);
774 static void dwarf2_free_abbrev_table (void *);
776 static struct abbrev_info
*peek_die_abbrev (gdb_byte
*, unsigned int *,
779 static struct abbrev_info
*dwarf2_lookup_abbrev (unsigned int,
782 static struct partial_die_info
*load_partial_dies (bfd
*, gdb_byte
*, int,
785 static gdb_byte
*read_partial_die (struct partial_die_info
*,
786 struct abbrev_info
*abbrev
, unsigned int,
787 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
789 static struct partial_die_info
*find_partial_die (unsigned long,
792 static void fixup_partial_die (struct partial_die_info
*,
795 static gdb_byte
*read_full_die (struct die_info
**, bfd
*, gdb_byte
*,
796 struct dwarf2_cu
*, int *);
798 static gdb_byte
*read_attribute (struct attribute
*, struct attr_abbrev
*,
799 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
801 static gdb_byte
*read_attribute_value (struct attribute
*, unsigned,
802 bfd
*, gdb_byte
*, struct dwarf2_cu
*);
804 static unsigned int read_1_byte (bfd
*, gdb_byte
*);
806 static int read_1_signed_byte (bfd
*, gdb_byte
*);
808 static unsigned int read_2_bytes (bfd
*, gdb_byte
*);
810 static unsigned int read_4_bytes (bfd
*, gdb_byte
*);
812 static unsigned long read_8_bytes (bfd
*, gdb_byte
*);
814 static CORE_ADDR
read_address (bfd
*, gdb_byte
*ptr
, struct dwarf2_cu
*,
817 static LONGEST
read_initial_length (bfd
*, gdb_byte
*,
818 struct comp_unit_head
*, unsigned int *);
820 static LONGEST
read_offset (bfd
*, gdb_byte
*, const struct comp_unit_head
*,
823 static gdb_byte
*read_n_bytes (bfd
*, gdb_byte
*, unsigned int);
825 static char *read_string (bfd
*, gdb_byte
*, unsigned int *);
827 static char *read_indirect_string (bfd
*, gdb_byte
*,
828 const struct comp_unit_head
*,
831 static unsigned long read_unsigned_leb128 (bfd
*, gdb_byte
*, unsigned int *);
833 static long read_signed_leb128 (bfd
*, gdb_byte
*, unsigned int *);
835 static gdb_byte
*skip_leb128 (bfd
*, gdb_byte
*);
837 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
839 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
842 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
843 struct dwarf2_cu
*cu
);
845 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
847 static struct die_info
*die_specification (struct die_info
*die
,
850 static void free_line_header (struct line_header
*lh
);
852 static void add_file_name (struct line_header
*, char *, unsigned int,
853 unsigned int, unsigned int);
855 static struct line_header
*(dwarf_decode_line_header
856 (unsigned int offset
,
857 bfd
*abfd
, struct dwarf2_cu
*cu
));
859 static void dwarf_decode_lines (struct line_header
*, char *, bfd
*,
860 struct dwarf2_cu
*, struct partial_symtab
*);
862 static void dwarf2_start_subfile (char *, char *, char *);
864 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
867 static void dwarf2_const_value (struct attribute
*, struct symbol
*,
870 static void dwarf2_const_value_data (struct attribute
*attr
,
874 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
876 static struct type
*die_containing_type (struct die_info
*,
879 static struct type
*tag_type_to_type (struct die_info
*, struct dwarf2_cu
*);
881 static void read_type_die (struct die_info
*, struct dwarf2_cu
*);
883 static char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
885 static char *typename_concat (struct obstack
*,
890 static void read_typedef (struct die_info
*, struct dwarf2_cu
*);
892 static void read_base_type (struct die_info
*, struct dwarf2_cu
*);
894 static void read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
896 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
898 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
900 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
902 static int dwarf2_get_pc_bounds (struct die_info
*,
903 CORE_ADDR
*, CORE_ADDR
*, struct dwarf2_cu
*);
905 static void get_scope_pc_bounds (struct die_info
*,
906 CORE_ADDR
*, CORE_ADDR
*,
909 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
912 static void dwarf2_attach_fields_to_type (struct field_info
*,
913 struct type
*, struct dwarf2_cu
*);
915 static void dwarf2_add_member_fn (struct field_info
*,
916 struct die_info
*, struct type
*,
919 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
920 struct type
*, struct dwarf2_cu
*);
922 static void read_structure_type (struct die_info
*, struct dwarf2_cu
*);
924 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
926 static char *determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
928 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
930 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
932 static const char *namespace_name (struct die_info
*die
,
933 int *is_anonymous
, struct dwarf2_cu
*);
935 static void read_enumeration_type (struct die_info
*, struct dwarf2_cu
*);
937 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
939 static struct type
*dwarf_base_type (int, int, struct dwarf2_cu
*);
941 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
943 static void read_array_type (struct die_info
*, struct dwarf2_cu
*);
945 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
948 static void read_tag_pointer_type (struct die_info
*, struct dwarf2_cu
*);
950 static void read_tag_ptr_to_member_type (struct die_info
*,
953 static void read_tag_reference_type (struct die_info
*, struct dwarf2_cu
*);
955 static void read_tag_const_type (struct die_info
*, struct dwarf2_cu
*);
957 static void read_tag_volatile_type (struct die_info
*, struct dwarf2_cu
*);
959 static void read_tag_string_type (struct die_info
*, struct dwarf2_cu
*);
961 static void read_subroutine_type (struct die_info
*, struct dwarf2_cu
*);
963 static struct die_info
*read_comp_unit (gdb_byte
*, bfd
*, struct dwarf2_cu
*);
965 static struct die_info
*read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
967 gdb_byte
**new_info_ptr
,
968 struct die_info
*parent
);
970 static struct die_info
*read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
972 gdb_byte
**new_info_ptr
,
973 struct die_info
*parent
);
975 static void free_die_list (struct die_info
*);
977 static void process_die (struct die_info
*, struct dwarf2_cu
*);
979 static char *dwarf2_linkage_name (struct die_info
*, struct dwarf2_cu
*);
981 static char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
983 static struct die_info
*dwarf2_extension (struct die_info
*die
,
986 static char *dwarf_tag_name (unsigned int);
988 static char *dwarf_attr_name (unsigned int);
990 static char *dwarf_form_name (unsigned int);
992 static char *dwarf_stack_op_name (unsigned int);
994 static char *dwarf_bool_name (unsigned int);
996 static char *dwarf_type_encoding_name (unsigned int);
999 static char *dwarf_cfi_name (unsigned int);
1001 struct die_info
*copy_die (struct die_info
*);
1004 static struct die_info
*sibling_die (struct die_info
*);
1006 static void dump_die (struct die_info
*);
1008 static void dump_die_list (struct die_info
*);
1010 static void store_in_ref_table (unsigned int, struct die_info
*,
1011 struct dwarf2_cu
*);
1013 static unsigned int dwarf2_get_ref_die_offset (struct attribute
*,
1014 struct dwarf2_cu
*);
1016 static int dwarf2_get_attr_constant_value (struct attribute
*, int);
1018 static struct die_info
*follow_die_ref (struct die_info
*,
1020 struct dwarf2_cu
*);
1022 static struct type
*dwarf2_fundamental_type (struct objfile
*, int,
1023 struct dwarf2_cu
*);
1025 /* memory allocation interface */
1027 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1029 static struct abbrev_info
*dwarf_alloc_abbrev (struct dwarf2_cu
*);
1031 static struct die_info
*dwarf_alloc_die (void);
1033 static void initialize_cu_func_list (struct dwarf2_cu
*);
1035 static void add_to_cu_func_list (const char *, CORE_ADDR
, CORE_ADDR
,
1036 struct dwarf2_cu
*);
1038 static void dwarf_decode_macros (struct line_header
*, unsigned int,
1039 char *, bfd
*, struct dwarf2_cu
*);
1041 static int attr_form_is_block (struct attribute
*);
1043 static void dwarf2_symbol_mark_computed (struct attribute
*attr
,
1045 struct dwarf2_cu
*cu
);
1047 static gdb_byte
*skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
1048 struct dwarf2_cu
*cu
);
1050 static void free_stack_comp_unit (void *);
1052 static hashval_t
partial_die_hash (const void *item
);
1054 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1056 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1057 (unsigned long offset
, struct objfile
*objfile
);
1059 static struct dwarf2_per_cu_data
*dwarf2_find_comp_unit
1060 (unsigned long offset
, struct objfile
*objfile
);
1062 static void free_one_comp_unit (void *);
1064 static void free_cached_comp_units (void *);
1066 static void age_cached_comp_units (void);
1068 static void free_one_cached_comp_unit (void *);
1070 static void set_die_type (struct die_info
*, struct type
*,
1071 struct dwarf2_cu
*);
1073 static void reset_die_and_siblings_types (struct die_info
*,
1074 struct dwarf2_cu
*);
1076 static void create_all_comp_units (struct objfile
*);
1078 static struct dwarf2_cu
*load_full_comp_unit (struct dwarf2_per_cu_data
*,
1081 static void process_full_comp_unit (struct dwarf2_per_cu_data
*);
1083 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1084 struct dwarf2_per_cu_data
*);
1086 static void dwarf2_mark (struct dwarf2_cu
*);
1088 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1090 static void read_set_type (struct die_info
*, struct dwarf2_cu
*);
1093 /* Try to locate the sections we need for DWARF 2 debugging
1094 information and return true if we have enough to do something. */
1097 dwarf2_has_info (struct objfile
*objfile
)
1099 struct dwarf2_per_objfile
*data
;
1101 /* Initialize per-objfile state. */
1102 data
= obstack_alloc (&objfile
->objfile_obstack
, sizeof (*data
));
1103 memset (data
, 0, sizeof (*data
));
1104 set_objfile_data (objfile
, dwarf2_objfile_data_key
, data
);
1105 dwarf2_per_objfile
= data
;
1107 dwarf_info_section
= 0;
1108 dwarf_abbrev_section
= 0;
1109 dwarf_line_section
= 0;
1110 dwarf_str_section
= 0;
1111 dwarf_macinfo_section
= 0;
1112 dwarf_frame_section
= 0;
1113 dwarf_eh_frame_section
= 0;
1114 dwarf_ranges_section
= 0;
1115 dwarf_loc_section
= 0;
1117 bfd_map_over_sections (objfile
->obfd
, dwarf2_locate_sections
, NULL
);
1118 return (dwarf_info_section
!= NULL
&& dwarf_abbrev_section
!= NULL
);
1121 /* This function is mapped across the sections and remembers the
1122 offset and size of each of the debugging sections we are interested
1126 dwarf2_locate_sections (bfd
*abfd
, asection
*sectp
, void *ignore_ptr
)
1128 if (strcmp (sectp
->name
, INFO_SECTION
) == 0)
1130 dwarf2_per_objfile
->info_size
= bfd_get_section_size (sectp
);
1131 dwarf_info_section
= sectp
;
1133 else if (strcmp (sectp
->name
, ABBREV_SECTION
) == 0)
1135 dwarf2_per_objfile
->abbrev_size
= bfd_get_section_size (sectp
);
1136 dwarf_abbrev_section
= sectp
;
1138 else if (strcmp (sectp
->name
, LINE_SECTION
) == 0)
1140 dwarf2_per_objfile
->line_size
= bfd_get_section_size (sectp
);
1141 dwarf_line_section
= sectp
;
1143 else if (strcmp (sectp
->name
, PUBNAMES_SECTION
) == 0)
1145 dwarf2_per_objfile
->pubnames_size
= bfd_get_section_size (sectp
);
1146 dwarf_pubnames_section
= sectp
;
1148 else if (strcmp (sectp
->name
, ARANGES_SECTION
) == 0)
1150 dwarf2_per_objfile
->aranges_size
= bfd_get_section_size (sectp
);
1151 dwarf_aranges_section
= sectp
;
1153 else if (strcmp (sectp
->name
, LOC_SECTION
) == 0)
1155 dwarf2_per_objfile
->loc_size
= bfd_get_section_size (sectp
);
1156 dwarf_loc_section
= sectp
;
1158 else if (strcmp (sectp
->name
, MACINFO_SECTION
) == 0)
1160 dwarf2_per_objfile
->macinfo_size
= bfd_get_section_size (sectp
);
1161 dwarf_macinfo_section
= sectp
;
1163 else if (strcmp (sectp
->name
, STR_SECTION
) == 0)
1165 dwarf2_per_objfile
->str_size
= bfd_get_section_size (sectp
);
1166 dwarf_str_section
= sectp
;
1168 else if (strcmp (sectp
->name
, FRAME_SECTION
) == 0)
1170 dwarf2_per_objfile
->frame_size
= bfd_get_section_size (sectp
);
1171 dwarf_frame_section
= sectp
;
1173 else if (strcmp (sectp
->name
, EH_FRAME_SECTION
) == 0)
1175 flagword aflag
= bfd_get_section_flags (ignore_abfd
, sectp
);
1176 if (aflag
& SEC_HAS_CONTENTS
)
1178 dwarf2_per_objfile
->eh_frame_size
= bfd_get_section_size (sectp
);
1179 dwarf_eh_frame_section
= sectp
;
1182 else if (strcmp (sectp
->name
, RANGES_SECTION
) == 0)
1184 dwarf2_per_objfile
->ranges_size
= bfd_get_section_size (sectp
);
1185 dwarf_ranges_section
= sectp
;
1188 if ((bfd_get_section_flags (abfd
, sectp
) & SEC_LOAD
)
1189 && bfd_section_vma (abfd
, sectp
) == 0)
1190 dwarf2_per_objfile
->has_section_at_zero
= 1;
1193 /* Build a partial symbol table. */
1196 dwarf2_build_psymtabs (struct objfile
*objfile
, int mainline
)
1198 /* We definitely need the .debug_info and .debug_abbrev sections */
1200 dwarf2_per_objfile
->info_buffer
= dwarf2_read_section (objfile
, dwarf_info_section
);
1201 dwarf2_per_objfile
->abbrev_buffer
= dwarf2_read_section (objfile
, dwarf_abbrev_section
);
1203 if (dwarf_line_section
)
1204 dwarf2_per_objfile
->line_buffer
= dwarf2_read_section (objfile
, dwarf_line_section
);
1206 dwarf2_per_objfile
->line_buffer
= NULL
;
1208 if (dwarf_str_section
)
1209 dwarf2_per_objfile
->str_buffer
= dwarf2_read_section (objfile
, dwarf_str_section
);
1211 dwarf2_per_objfile
->str_buffer
= NULL
;
1213 if (dwarf_macinfo_section
)
1214 dwarf2_per_objfile
->macinfo_buffer
= dwarf2_read_section (objfile
,
1215 dwarf_macinfo_section
);
1217 dwarf2_per_objfile
->macinfo_buffer
= NULL
;
1219 if (dwarf_ranges_section
)
1220 dwarf2_per_objfile
->ranges_buffer
= dwarf2_read_section (objfile
, dwarf_ranges_section
);
1222 dwarf2_per_objfile
->ranges_buffer
= NULL
;
1224 if (dwarf_loc_section
)
1225 dwarf2_per_objfile
->loc_buffer
= dwarf2_read_section (objfile
, dwarf_loc_section
);
1227 dwarf2_per_objfile
->loc_buffer
= NULL
;
1230 || (objfile
->global_psymbols
.size
== 0
1231 && objfile
->static_psymbols
.size
== 0))
1233 init_psymbol_list (objfile
, 1024);
1237 if (dwarf_aranges_offset
&& dwarf_pubnames_offset
)
1239 /* Things are significantly easier if we have .debug_aranges and
1240 .debug_pubnames sections */
1242 dwarf2_build_psymtabs_easy (objfile
, mainline
);
1246 /* only test this case for now */
1248 /* In this case we have to work a bit harder */
1249 dwarf2_build_psymtabs_hard (objfile
, mainline
);
1254 /* Build the partial symbol table from the information in the
1255 .debug_pubnames and .debug_aranges sections. */
1258 dwarf2_build_psymtabs_easy (struct objfile
*objfile
, int mainline
)
1260 bfd
*abfd
= objfile
->obfd
;
1261 char *aranges_buffer
, *pubnames_buffer
;
1262 char *aranges_ptr
, *pubnames_ptr
;
1263 unsigned int entry_length
, version
, info_offset
, info_size
;
1265 pubnames_buffer
= dwarf2_read_section (objfile
,
1266 dwarf_pubnames_section
);
1267 pubnames_ptr
= pubnames_buffer
;
1268 while ((pubnames_ptr
- pubnames_buffer
) < dwarf2_per_objfile
->pubnames_size
)
1270 struct comp_unit_head cu_header
;
1271 unsigned int bytes_read
;
1273 entry_length
= read_initial_length (abfd
, pubnames_ptr
, &cu_header
,
1275 pubnames_ptr
+= bytes_read
;
1276 version
= read_1_byte (abfd
, pubnames_ptr
);
1278 info_offset
= read_4_bytes (abfd
, pubnames_ptr
);
1280 info_size
= read_4_bytes (abfd
, pubnames_ptr
);
1284 aranges_buffer
= dwarf2_read_section (objfile
,
1285 dwarf_aranges_section
);
1290 /* Read in the comp unit header information from the debug_info at
1294 read_comp_unit_head (struct comp_unit_head
*cu_header
,
1295 gdb_byte
*info_ptr
, bfd
*abfd
)
1298 unsigned int bytes_read
;
1299 cu_header
->length
= read_initial_length (abfd
, info_ptr
, cu_header
,
1301 info_ptr
+= bytes_read
;
1302 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
1304 cu_header
->abbrev_offset
= read_offset (abfd
, info_ptr
, cu_header
,
1306 info_ptr
+= bytes_read
;
1307 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
1309 signed_addr
= bfd_get_sign_extend_vma (abfd
);
1310 if (signed_addr
< 0)
1311 internal_error (__FILE__
, __LINE__
,
1312 _("read_comp_unit_head: dwarf from non elf file"));
1313 cu_header
->signed_addr_p
= signed_addr
;
1318 partial_read_comp_unit_head (struct comp_unit_head
*header
, gdb_byte
*info_ptr
,
1321 gdb_byte
*beg_of_comp_unit
= info_ptr
;
1323 info_ptr
= read_comp_unit_head (header
, info_ptr
, abfd
);
1325 if (header
->version
!= 2 && header
->version
!= 3)
1326 error (_("Dwarf Error: wrong version in compilation unit header "
1327 "(is %d, should be %d) [in module %s]"), header
->version
,
1328 2, bfd_get_filename (abfd
));
1330 if (header
->abbrev_offset
>= dwarf2_per_objfile
->abbrev_size
)
1331 error (_("Dwarf Error: bad offset (0x%lx) in compilation unit header "
1332 "(offset 0x%lx + 6) [in module %s]"),
1333 (long) header
->abbrev_offset
,
1334 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1335 bfd_get_filename (abfd
));
1337 if (beg_of_comp_unit
+ header
->length
+ header
->initial_length_size
1338 > dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1339 error (_("Dwarf Error: bad length (0x%lx) in compilation unit header "
1340 "(offset 0x%lx + 0) [in module %s]"),
1341 (long) header
->length
,
1342 (long) (beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
),
1343 bfd_get_filename (abfd
));
1348 /* Allocate a new partial symtab for file named NAME and mark this new
1349 partial symtab as being an include of PST. */
1352 dwarf2_create_include_psymtab (char *name
, struct partial_symtab
*pst
,
1353 struct objfile
*objfile
)
1355 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
1357 subpst
->section_offsets
= pst
->section_offsets
;
1358 subpst
->textlow
= 0;
1359 subpst
->texthigh
= 0;
1361 subpst
->dependencies
= (struct partial_symtab
**)
1362 obstack_alloc (&objfile
->objfile_obstack
,
1363 sizeof (struct partial_symtab
*));
1364 subpst
->dependencies
[0] = pst
;
1365 subpst
->number_of_dependencies
= 1;
1367 subpst
->globals_offset
= 0;
1368 subpst
->n_global_syms
= 0;
1369 subpst
->statics_offset
= 0;
1370 subpst
->n_static_syms
= 0;
1371 subpst
->symtab
= NULL
;
1372 subpst
->read_symtab
= pst
->read_symtab
;
1375 /* No private part is necessary for include psymtabs. This property
1376 can be used to differentiate between such include psymtabs and
1377 the regular ones. */
1378 subpst
->read_symtab_private
= NULL
;
1381 /* Read the Line Number Program data and extract the list of files
1382 included by the source file represented by PST. Build an include
1383 partial symtab for each of these included files.
1385 This procedure assumes that there *is* a Line Number Program in
1386 the given CU. Callers should check that PDI->HAS_STMT_LIST is set
1387 before calling this procedure. */
1390 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
1391 struct partial_die_info
*pdi
,
1392 struct partial_symtab
*pst
)
1394 struct objfile
*objfile
= cu
->objfile
;
1395 bfd
*abfd
= objfile
->obfd
;
1396 struct line_header
*lh
;
1398 lh
= dwarf_decode_line_header (pdi
->line_offset
, abfd
, cu
);
1400 return; /* No linetable, so no includes. */
1402 dwarf_decode_lines (lh
, NULL
, abfd
, cu
, pst
);
1404 free_line_header (lh
);
1408 /* Build the partial symbol table by doing a quick pass through the
1409 .debug_info and .debug_abbrev sections. */
1412 dwarf2_build_psymtabs_hard (struct objfile
*objfile
, int mainline
)
1414 /* Instead of reading this into a big buffer, we should probably use
1415 mmap() on architectures that support it. (FIXME) */
1416 bfd
*abfd
= objfile
->obfd
;
1418 gdb_byte
*beg_of_comp_unit
;
1419 struct partial_die_info comp_unit_die
;
1420 struct partial_symtab
*pst
;
1421 struct cleanup
*back_to
;
1422 CORE_ADDR lowpc
, highpc
, baseaddr
;
1424 info_ptr
= dwarf2_per_objfile
->info_buffer
;
1426 /* Any cached compilation units will be linked by the per-objfile
1427 read_in_chain. Make sure to free them when we're done. */
1428 back_to
= make_cleanup (free_cached_comp_units
, NULL
);
1430 create_all_comp_units (objfile
);
1432 /* Since the objects we're extracting from .debug_info vary in
1433 length, only the individual functions to extract them (like
1434 read_comp_unit_head and load_partial_die) can really know whether
1435 the buffer is large enough to hold another complete object.
1437 At the moment, they don't actually check that. If .debug_info
1438 holds just one extra byte after the last compilation unit's dies,
1439 then read_comp_unit_head will happily read off the end of the
1440 buffer. read_partial_die is similarly casual. Those functions
1443 For this loop condition, simply checking whether there's any data
1444 left at all should be sufficient. */
1445 while (info_ptr
< (dwarf2_per_objfile
->info_buffer
1446 + dwarf2_per_objfile
->info_size
))
1448 struct cleanup
*back_to_inner
;
1449 struct dwarf2_cu cu
;
1450 struct abbrev_info
*abbrev
;
1451 unsigned int bytes_read
;
1452 struct dwarf2_per_cu_data
*this_cu
;
1454 beg_of_comp_unit
= info_ptr
;
1456 memset (&cu
, 0, sizeof (cu
));
1458 obstack_init (&cu
.comp_unit_obstack
);
1460 back_to_inner
= make_cleanup (free_stack_comp_unit
, &cu
);
1462 cu
.objfile
= objfile
;
1463 info_ptr
= partial_read_comp_unit_head (&cu
.header
, info_ptr
, abfd
);
1465 /* Complete the cu_header */
1466 cu
.header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1467 cu
.header
.first_die_ptr
= info_ptr
;
1468 cu
.header
.cu_head_ptr
= beg_of_comp_unit
;
1470 cu
.list_in_scope
= &file_symbols
;
1472 /* Read the abbrevs for this compilation unit into a table */
1473 dwarf2_read_abbrevs (abfd
, &cu
);
1474 make_cleanup (dwarf2_free_abbrev_table
, &cu
);
1476 this_cu
= dwarf2_find_comp_unit (cu
.header
.offset
, objfile
);
1478 /* Read the compilation unit die */
1479 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, &cu
);
1480 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1481 abfd
, info_ptr
, &cu
);
1483 if (comp_unit_die
.tag
== DW_TAG_partial_unit
)
1485 info_ptr
= (beg_of_comp_unit
+ cu
.header
.length
1486 + cu
.header
.initial_length_size
);
1487 do_cleanups (back_to_inner
);
1491 /* Set the language we're debugging */
1492 set_cu_language (comp_unit_die
.language
, &cu
);
1494 /* Allocate a new partial symbol table structure */
1495 pst
= start_psymtab_common (objfile
, objfile
->section_offsets
,
1496 comp_unit_die
.name
? comp_unit_die
.name
: "",
1497 comp_unit_die
.lowpc
,
1498 objfile
->global_psymbols
.next
,
1499 objfile
->static_psymbols
.next
);
1501 if (comp_unit_die
.dirname
)
1502 pst
->dirname
= xstrdup (comp_unit_die
.dirname
);
1504 pst
->read_symtab_private
= (char *) this_cu
;
1506 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1508 /* Store the function that reads in the rest of the symbol table */
1509 pst
->read_symtab
= dwarf2_psymtab_to_symtab
;
1511 /* If this compilation unit was already read in, free the
1512 cached copy in order to read it in again. This is
1513 necessary because we skipped some symbols when we first
1514 read in the compilation unit (see load_partial_dies).
1515 This problem could be avoided, but the benefit is
1517 if (this_cu
->cu
!= NULL
)
1518 free_one_cached_comp_unit (this_cu
->cu
);
1520 cu
.per_cu
= this_cu
;
1522 /* Note that this is a pointer to our stack frame, being
1523 added to a global data structure. It will be cleaned up
1524 in free_stack_comp_unit when we finish with this
1525 compilation unit. */
1528 this_cu
->psymtab
= pst
;
1530 /* Check if comp unit has_children.
1531 If so, read the rest of the partial symbols from this comp unit.
1532 If not, there's no more debug_info for this comp unit. */
1533 if (comp_unit_die
.has_children
)
1535 struct partial_die_info
*first_die
;
1537 lowpc
= ((CORE_ADDR
) -1);
1538 highpc
= ((CORE_ADDR
) 0);
1540 first_die
= load_partial_dies (abfd
, info_ptr
, 1, &cu
);
1542 scan_partial_symbols (first_die
, &lowpc
, &highpc
, &cu
);
1544 /* If we didn't find a lowpc, set it to highpc to avoid
1545 complaints from `maint check'. */
1546 if (lowpc
== ((CORE_ADDR
) -1))
1549 /* If the compilation unit didn't have an explicit address range,
1550 then use the information extracted from its child dies. */
1551 if (! comp_unit_die
.has_pc_info
)
1553 comp_unit_die
.lowpc
= lowpc
;
1554 comp_unit_die
.highpc
= highpc
;
1557 pst
->textlow
= comp_unit_die
.lowpc
+ baseaddr
;
1558 pst
->texthigh
= comp_unit_die
.highpc
+ baseaddr
;
1560 pst
->n_global_syms
= objfile
->global_psymbols
.next
-
1561 (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1562 pst
->n_static_syms
= objfile
->static_psymbols
.next
-
1563 (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1564 sort_pst_symbols (pst
);
1566 /* If there is already a psymtab or symtab for a file of this
1567 name, remove it. (If there is a symtab, more drastic things
1568 also happen.) This happens in VxWorks. */
1569 free_named_symtabs (pst
->filename
);
1571 info_ptr
= beg_of_comp_unit
+ cu
.header
.length
1572 + cu
.header
.initial_length_size
;
1574 if (comp_unit_die
.has_stmt_list
)
1576 /* Get the list of files included in the current compilation unit,
1577 and build a psymtab for each of them. */
1578 dwarf2_build_include_psymtabs (&cu
, &comp_unit_die
, pst
);
1581 do_cleanups (back_to_inner
);
1583 do_cleanups (back_to
);
1586 /* Load the DIEs for a secondary CU into memory. */
1589 load_comp_unit (struct dwarf2_per_cu_data
*this_cu
, struct objfile
*objfile
)
1591 bfd
*abfd
= objfile
->obfd
;
1592 gdb_byte
*info_ptr
, *beg_of_comp_unit
;
1593 struct partial_die_info comp_unit_die
;
1594 struct dwarf2_cu
*cu
;
1595 struct abbrev_info
*abbrev
;
1596 unsigned int bytes_read
;
1597 struct cleanup
*back_to
;
1599 info_ptr
= dwarf2_per_objfile
->info_buffer
+ this_cu
->offset
;
1600 beg_of_comp_unit
= info_ptr
;
1602 cu
= xmalloc (sizeof (struct dwarf2_cu
));
1603 memset (cu
, 0, sizeof (struct dwarf2_cu
));
1605 obstack_init (&cu
->comp_unit_obstack
);
1607 cu
->objfile
= objfile
;
1608 info_ptr
= partial_read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
1610 /* Complete the cu_header. */
1611 cu
->header
.offset
= beg_of_comp_unit
- dwarf2_per_objfile
->info_buffer
;
1612 cu
->header
.first_die_ptr
= info_ptr
;
1613 cu
->header
.cu_head_ptr
= beg_of_comp_unit
;
1615 /* Read the abbrevs for this compilation unit into a table. */
1616 dwarf2_read_abbrevs (abfd
, cu
);
1617 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
1619 /* Read the compilation unit die. */
1620 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
1621 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
1622 abfd
, info_ptr
, cu
);
1624 /* Set the language we're debugging. */
1625 set_cu_language (comp_unit_die
.language
, cu
);
1627 /* Link this compilation unit into the compilation unit tree. */
1629 cu
->per_cu
= this_cu
;
1631 /* Check if comp unit has_children.
1632 If so, read the rest of the partial symbols from this comp unit.
1633 If not, there's no more debug_info for this comp unit. */
1634 if (comp_unit_die
.has_children
)
1635 load_partial_dies (abfd
, info_ptr
, 0, cu
);
1637 do_cleanups (back_to
);
1640 /* Create a list of all compilation units in OBJFILE. We do this only
1641 if an inter-comp-unit reference is found; presumably if there is one,
1642 there will be many, and one will occur early in the .debug_info section.
1643 So there's no point in building this list incrementally. */
1646 create_all_comp_units (struct objfile
*objfile
)
1650 struct dwarf2_per_cu_data
**all_comp_units
;
1651 gdb_byte
*info_ptr
= dwarf2_per_objfile
->info_buffer
;
1655 all_comp_units
= xmalloc (n_allocated
1656 * sizeof (struct dwarf2_per_cu_data
*));
1658 while (info_ptr
< dwarf2_per_objfile
->info_buffer
+ dwarf2_per_objfile
->info_size
)
1660 struct comp_unit_head cu_header
;
1661 gdb_byte
*beg_of_comp_unit
;
1662 struct dwarf2_per_cu_data
*this_cu
;
1663 unsigned long offset
;
1664 unsigned int bytes_read
;
1666 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
1668 /* Read just enough information to find out where the next
1669 compilation unit is. */
1670 cu_header
.initial_length_size
= 0;
1671 cu_header
.length
= read_initial_length (objfile
->obfd
, info_ptr
,
1672 &cu_header
, &bytes_read
);
1674 /* Save the compilation unit for later lookup. */
1675 this_cu
= obstack_alloc (&objfile
->objfile_obstack
,
1676 sizeof (struct dwarf2_per_cu_data
));
1677 memset (this_cu
, 0, sizeof (*this_cu
));
1678 this_cu
->offset
= offset
;
1679 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
1681 if (n_comp_units
== n_allocated
)
1684 all_comp_units
= xrealloc (all_comp_units
,
1686 * sizeof (struct dwarf2_per_cu_data
*));
1688 all_comp_units
[n_comp_units
++] = this_cu
;
1690 info_ptr
= info_ptr
+ this_cu
->length
;
1693 dwarf2_per_objfile
->all_comp_units
1694 = obstack_alloc (&objfile
->objfile_obstack
,
1695 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1696 memcpy (dwarf2_per_objfile
->all_comp_units
, all_comp_units
,
1697 n_comp_units
* sizeof (struct dwarf2_per_cu_data
*));
1698 xfree (all_comp_units
);
1699 dwarf2_per_objfile
->n_comp_units
= n_comp_units
;
1702 /* Process all loaded DIEs for compilation unit CU, starting at FIRST_DIE.
1703 Also set *LOWPC and *HIGHPC to the lowest and highest PC values found
1707 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
1708 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
1710 struct objfile
*objfile
= cu
->objfile
;
1711 bfd
*abfd
= objfile
->obfd
;
1712 struct partial_die_info
*pdi
;
1714 /* Now, march along the PDI's, descending into ones which have
1715 interesting children but skipping the children of the other ones,
1716 until we reach the end of the compilation unit. */
1722 fixup_partial_die (pdi
, cu
);
1724 /* Anonymous namespaces have no name but have interesting
1725 children, so we need to look at them. Ditto for anonymous
1728 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
1729 || pdi
->tag
== DW_TAG_enumeration_type
)
1733 case DW_TAG_subprogram
:
1734 if (pdi
->has_pc_info
)
1736 if (pdi
->lowpc
< *lowpc
)
1738 *lowpc
= pdi
->lowpc
;
1740 if (pdi
->highpc
> *highpc
)
1742 *highpc
= pdi
->highpc
;
1744 if (!pdi
->is_declaration
)
1746 add_partial_symbol (pdi
, cu
);
1750 case DW_TAG_variable
:
1751 case DW_TAG_typedef
:
1752 case DW_TAG_union_type
:
1753 if (!pdi
->is_declaration
)
1755 add_partial_symbol (pdi
, cu
);
1758 case DW_TAG_class_type
:
1759 case DW_TAG_structure_type
:
1760 if (!pdi
->is_declaration
)
1762 add_partial_symbol (pdi
, cu
);
1765 case DW_TAG_enumeration_type
:
1766 if (!pdi
->is_declaration
)
1767 add_partial_enumeration (pdi
, cu
);
1769 case DW_TAG_base_type
:
1770 case DW_TAG_subrange_type
:
1771 /* File scope base type definitions are added to the partial
1773 add_partial_symbol (pdi
, cu
);
1775 case DW_TAG_namespace
:
1776 add_partial_namespace (pdi
, lowpc
, highpc
, cu
);
1783 /* If the die has a sibling, skip to the sibling. */
1785 pdi
= pdi
->die_sibling
;
1789 /* Functions used to compute the fully scoped name of a partial DIE.
1791 Normally, this is simple. For C++, the parent DIE's fully scoped
1792 name is concatenated with "::" and the partial DIE's name. For
1793 Java, the same thing occurs except that "." is used instead of "::".
1794 Enumerators are an exception; they use the scope of their parent
1795 enumeration type, i.e. the name of the enumeration type is not
1796 prepended to the enumerator.
1798 There are two complexities. One is DW_AT_specification; in this
1799 case "parent" means the parent of the target of the specification,
1800 instead of the direct parent of the DIE. The other is compilers
1801 which do not emit DW_TAG_namespace; in this case we try to guess
1802 the fully qualified name of structure types from their members'
1803 linkage names. This must be done using the DIE's children rather
1804 than the children of any DW_AT_specification target. We only need
1805 to do this for structures at the top level, i.e. if the target of
1806 any DW_AT_specification (if any; otherwise the DIE itself) does not
1809 /* Compute the scope prefix associated with PDI's parent, in
1810 compilation unit CU. The result will be allocated on CU's
1811 comp_unit_obstack, or a copy of the already allocated PDI->NAME
1812 field. NULL is returned if no prefix is necessary. */
1814 partial_die_parent_scope (struct partial_die_info
*pdi
,
1815 struct dwarf2_cu
*cu
)
1817 char *grandparent_scope
;
1818 struct partial_die_info
*parent
, *real_pdi
;
1820 /* We need to look at our parent DIE; if we have a DW_AT_specification,
1821 then this means the parent of the specification DIE. */
1824 while (real_pdi
->has_specification
)
1825 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
1827 parent
= real_pdi
->die_parent
;
1831 if (parent
->scope_set
)
1832 return parent
->scope
;
1834 fixup_partial_die (parent
, cu
);
1836 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
1838 if (parent
->tag
== DW_TAG_namespace
1839 || parent
->tag
== DW_TAG_structure_type
1840 || parent
->tag
== DW_TAG_class_type
1841 || parent
->tag
== DW_TAG_union_type
)
1843 if (grandparent_scope
== NULL
)
1844 parent
->scope
= parent
->name
;
1846 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
, grandparent_scope
,
1849 else if (parent
->tag
== DW_TAG_enumeration_type
)
1850 /* Enumerators should not get the name of the enumeration as a prefix. */
1851 parent
->scope
= grandparent_scope
;
1854 /* FIXME drow/2004-04-01: What should we be doing with
1855 function-local names? For partial symbols, we should probably be
1857 complaint (&symfile_complaints
,
1858 _("unhandled containing DIE tag %d for DIE at %d"),
1859 parent
->tag
, pdi
->offset
);
1860 parent
->scope
= grandparent_scope
;
1863 parent
->scope_set
= 1;
1864 return parent
->scope
;
1867 /* Return the fully scoped name associated with PDI, from compilation unit
1868 CU. The result will be allocated with malloc. */
1870 partial_die_full_name (struct partial_die_info
*pdi
,
1871 struct dwarf2_cu
*cu
)
1875 parent_scope
= partial_die_parent_scope (pdi
, cu
);
1876 if (parent_scope
== NULL
)
1879 return typename_concat (NULL
, parent_scope
, pdi
->name
, cu
);
1883 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
1885 struct objfile
*objfile
= cu
->objfile
;
1887 char *actual_name
= NULL
;
1888 const char *my_prefix
;
1889 const struct partial_symbol
*psym
= NULL
;
1891 int built_actual_name
= 0;
1893 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
1895 if (pdi_needs_namespace (pdi
->tag
))
1897 actual_name
= partial_die_full_name (pdi
, cu
);
1899 built_actual_name
= 1;
1902 if (actual_name
== NULL
)
1903 actual_name
= pdi
->name
;
1907 case DW_TAG_subprogram
:
1908 if (pdi
->is_external
)
1910 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1911 mst_text, objfile); */
1912 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1913 VAR_DOMAIN
, LOC_BLOCK
,
1914 &objfile
->global_psymbols
,
1915 0, pdi
->lowpc
+ baseaddr
,
1916 cu
->language
, objfile
);
1920 /*prim_record_minimal_symbol (actual_name, pdi->lowpc + baseaddr,
1921 mst_file_text, objfile); */
1922 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1923 VAR_DOMAIN
, LOC_BLOCK
,
1924 &objfile
->static_psymbols
,
1925 0, pdi
->lowpc
+ baseaddr
,
1926 cu
->language
, objfile
);
1929 case DW_TAG_variable
:
1930 if (pdi
->is_external
)
1933 Don't enter into the minimal symbol tables as there is
1934 a minimal symbol table entry from the ELF symbols already.
1935 Enter into partial symbol table if it has a location
1936 descriptor or a type.
1937 If the location descriptor is missing, new_symbol will create
1938 a LOC_UNRESOLVED symbol, the address of the variable will then
1939 be determined from the minimal symbol table whenever the variable
1941 The address for the partial symbol table entry is not
1942 used by GDB, but it comes in handy for debugging partial symbol
1946 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1947 if (pdi
->locdesc
|| pdi
->has_type
)
1948 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1949 VAR_DOMAIN
, LOC_STATIC
,
1950 &objfile
->global_psymbols
,
1952 cu
->language
, objfile
);
1956 /* Static Variable. Skip symbols without location descriptors. */
1957 if (pdi
->locdesc
== NULL
)
1959 if (built_actual_name
)
1960 xfree (actual_name
);
1963 addr
= decode_locdesc (pdi
->locdesc
, cu
);
1964 /*prim_record_minimal_symbol (actual_name, addr + baseaddr,
1965 mst_file_data, objfile); */
1966 psym
= add_psymbol_to_list (actual_name
, strlen (actual_name
),
1967 VAR_DOMAIN
, LOC_STATIC
,
1968 &objfile
->static_psymbols
,
1970 cu
->language
, objfile
);
1973 case DW_TAG_typedef
:
1974 case DW_TAG_base_type
:
1975 case DW_TAG_subrange_type
:
1976 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1977 VAR_DOMAIN
, LOC_TYPEDEF
,
1978 &objfile
->static_psymbols
,
1979 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1981 case DW_TAG_namespace
:
1982 add_psymbol_to_list (actual_name
, strlen (actual_name
),
1983 VAR_DOMAIN
, LOC_TYPEDEF
,
1984 &objfile
->global_psymbols
,
1985 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
1987 case DW_TAG_class_type
:
1988 case DW_TAG_structure_type
:
1989 case DW_TAG_union_type
:
1990 case DW_TAG_enumeration_type
:
1991 /* Skip external references. The DWARF standard says in the section
1992 about "Structure, Union, and Class Type Entries": "An incomplete
1993 structure, union or class type is represented by a structure,
1994 union or class entry that does not have a byte size attribute
1995 and that has a DW_AT_declaration attribute." */
1996 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
1998 if (built_actual_name
)
1999 xfree (actual_name
);
2003 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
2004 static vs. global. */
2005 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2006 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2007 (cu
->language
== language_cplus
2008 || cu
->language
== language_java
)
2009 ? &objfile
->global_psymbols
2010 : &objfile
->static_psymbols
,
2011 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2013 if (cu
->language
== language_cplus
2014 || cu
->language
== language_java
2015 || cu
->language
== language_ada
)
2017 /* For C++ and Java, these implicitly act as typedefs as well. */
2018 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2019 VAR_DOMAIN
, LOC_TYPEDEF
,
2020 &objfile
->global_psymbols
,
2021 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2024 case DW_TAG_enumerator
:
2025 add_psymbol_to_list (actual_name
, strlen (actual_name
),
2026 VAR_DOMAIN
, LOC_CONST
,
2027 (cu
->language
== language_cplus
2028 || cu
->language
== language_java
)
2029 ? &objfile
->global_psymbols
2030 : &objfile
->static_psymbols
,
2031 0, (CORE_ADDR
) 0, cu
->language
, objfile
);
2037 /* Check to see if we should scan the name for possible namespace
2038 info. Only do this if this is C++, if we don't have namespace
2039 debugging info in the file, if the psym is of an appropriate type
2040 (otherwise we'll have psym == NULL), and if we actually had a
2041 mangled name to begin with. */
2043 /* FIXME drow/2004-02-22: Why don't we do this for classes, i.e. the
2044 cases which do not set PSYM above? */
2046 if (cu
->language
== language_cplus
2047 && cu
->has_namespace_info
== 0
2049 && SYMBOL_CPLUS_DEMANGLED_NAME (psym
) != NULL
)
2050 cp_check_possible_namespace_symbols (SYMBOL_CPLUS_DEMANGLED_NAME (psym
),
2053 if (built_actual_name
)
2054 xfree (actual_name
);
2057 /* Determine whether a die of type TAG living in a C++ class or
2058 namespace needs to have the name of the scope prepended to the
2059 name listed in the die. */
2062 pdi_needs_namespace (enum dwarf_tag tag
)
2066 case DW_TAG_namespace
:
2067 case DW_TAG_typedef
:
2068 case DW_TAG_class_type
:
2069 case DW_TAG_structure_type
:
2070 case DW_TAG_union_type
:
2071 case DW_TAG_enumeration_type
:
2072 case DW_TAG_enumerator
:
2079 /* Read a partial die corresponding to a namespace; also, add a symbol
2080 corresponding to that namespace to the symbol table. NAMESPACE is
2081 the name of the enclosing namespace. */
2084 add_partial_namespace (struct partial_die_info
*pdi
,
2085 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
2086 struct dwarf2_cu
*cu
)
2088 struct objfile
*objfile
= cu
->objfile
;
2090 /* Add a symbol for the namespace. */
2092 add_partial_symbol (pdi
, cu
);
2094 /* Now scan partial symbols in that namespace. */
2096 if (pdi
->has_children
)
2097 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, cu
);
2100 /* See if we can figure out if the class lives in a namespace. We do
2101 this by looking for a member function; its demangled name will
2102 contain namespace info, if there is any. */
2105 guess_structure_name (struct partial_die_info
*struct_pdi
,
2106 struct dwarf2_cu
*cu
)
2108 if ((cu
->language
== language_cplus
2109 || cu
->language
== language_java
)
2110 && cu
->has_namespace_info
== 0
2111 && struct_pdi
->has_children
)
2113 /* NOTE: carlton/2003-10-07: Getting the info this way changes
2114 what template types look like, because the demangler
2115 frequently doesn't give the same name as the debug info. We
2116 could fix this by only using the demangled name to get the
2117 prefix (but see comment in read_structure_type). */
2119 struct partial_die_info
*child_pdi
= struct_pdi
->die_child
;
2120 struct partial_die_info
*real_pdi
;
2122 /* If this DIE (this DIE's specification, if any) has a parent, then
2123 we should not do this. We'll prepend the parent's fully qualified
2124 name when we create the partial symbol. */
2126 real_pdi
= struct_pdi
;
2127 while (real_pdi
->has_specification
)
2128 real_pdi
= find_partial_die (real_pdi
->spec_offset
, cu
);
2130 if (real_pdi
->die_parent
!= NULL
)
2133 while (child_pdi
!= NULL
)
2135 if (child_pdi
->tag
== DW_TAG_subprogram
)
2137 char *actual_class_name
2138 = language_class_name_from_physname (cu
->language_defn
,
2140 if (actual_class_name
!= NULL
)
2143 = obsavestring (actual_class_name
,
2144 strlen (actual_class_name
),
2145 &cu
->comp_unit_obstack
);
2146 xfree (actual_class_name
);
2151 child_pdi
= child_pdi
->die_sibling
;
2156 /* Read a partial die corresponding to an enumeration type. */
2159 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
2160 struct dwarf2_cu
*cu
)
2162 struct objfile
*objfile
= cu
->objfile
;
2163 bfd
*abfd
= objfile
->obfd
;
2164 struct partial_die_info
*pdi
;
2166 if (enum_pdi
->name
!= NULL
)
2167 add_partial_symbol (enum_pdi
, cu
);
2169 pdi
= enum_pdi
->die_child
;
2172 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
2173 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
2175 add_partial_symbol (pdi
, cu
);
2176 pdi
= pdi
->die_sibling
;
2180 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit CU.
2181 Return the corresponding abbrev, or NULL if the number is zero (indicating
2182 an empty DIE). In either case *BYTES_READ will be set to the length of
2183 the initial number. */
2185 static struct abbrev_info
*
2186 peek_die_abbrev (gdb_byte
*info_ptr
, unsigned int *bytes_read
,
2187 struct dwarf2_cu
*cu
)
2189 bfd
*abfd
= cu
->objfile
->obfd
;
2190 unsigned int abbrev_number
;
2191 struct abbrev_info
*abbrev
;
2193 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
2195 if (abbrev_number
== 0)
2198 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
2201 error (_("Dwarf Error: Could not find abbrev number %d [in module %s]"), abbrev_number
,
2202 bfd_get_filename (abfd
));
2208 /* Scan the debug information for CU starting at INFO_PTR. Returns a
2209 pointer to the end of a series of DIEs, terminated by an empty
2210 DIE. Any children of the skipped DIEs will also be skipped. */
2213 skip_children (gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
2215 struct abbrev_info
*abbrev
;
2216 unsigned int bytes_read
;
2220 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
2222 return info_ptr
+ bytes_read
;
2224 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
2228 /* Scan the debug information for CU starting at INFO_PTR. INFO_PTR
2229 should point just after the initial uleb128 of a DIE, and the
2230 abbrev corresponding to that skipped uleb128 should be passed in
2231 ABBREV. Returns a pointer to this DIE's sibling, skipping any
2235 skip_one_die (gdb_byte
*info_ptr
, struct abbrev_info
*abbrev
,
2236 struct dwarf2_cu
*cu
)
2238 unsigned int bytes_read
;
2239 struct attribute attr
;
2240 bfd
*abfd
= cu
->objfile
->obfd
;
2241 unsigned int form
, i
;
2243 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
2245 /* The only abbrev we care about is DW_AT_sibling. */
2246 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
2248 read_attribute (&attr
, &abbrev
->attrs
[i
],
2249 abfd
, info_ptr
, cu
);
2250 if (attr
.form
== DW_FORM_ref_addr
)
2251 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
2253 return dwarf2_per_objfile
->info_buffer
2254 + dwarf2_get_ref_die_offset (&attr
, cu
);
2257 /* If it isn't DW_AT_sibling, skip this attribute. */
2258 form
= abbrev
->attrs
[i
].form
;
2263 case DW_FORM_ref_addr
:
2264 info_ptr
+= cu
->header
.addr_size
;
2283 case DW_FORM_string
:
2284 read_string (abfd
, info_ptr
, &bytes_read
);
2285 info_ptr
+= bytes_read
;
2288 info_ptr
+= cu
->header
.offset_size
;
2291 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2292 info_ptr
+= bytes_read
;
2294 case DW_FORM_block1
:
2295 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
2297 case DW_FORM_block2
:
2298 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
2300 case DW_FORM_block4
:
2301 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
2305 case DW_FORM_ref_udata
:
2306 info_ptr
= skip_leb128 (abfd
, info_ptr
);
2308 case DW_FORM_indirect
:
2309 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
2310 info_ptr
+= bytes_read
;
2311 /* We need to continue parsing from here, so just go back to
2313 goto skip_attribute
;
2316 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
2317 dwarf_form_name (form
),
2318 bfd_get_filename (abfd
));
2322 if (abbrev
->has_children
)
2323 return skip_children (info_ptr
, cu
);
2328 /* Locate ORIG_PDI's sibling; INFO_PTR should point to the start of
2329 the next DIE after ORIG_PDI. */
2332 locate_pdi_sibling (struct partial_die_info
*orig_pdi
, gdb_byte
*info_ptr
,
2333 bfd
*abfd
, struct dwarf2_cu
*cu
)
2335 /* Do we know the sibling already? */
2337 if (orig_pdi
->sibling
)
2338 return orig_pdi
->sibling
;
2340 /* Are there any children to deal with? */
2342 if (!orig_pdi
->has_children
)
2345 /* Skip the children the long way. */
2347 return skip_children (info_ptr
, cu
);
2350 /* Expand this partial symbol table into a full symbol table. */
2353 dwarf2_psymtab_to_symtab (struct partial_symtab
*pst
)
2355 /* FIXME: This is barely more than a stub. */
2360 warning (_("bug: psymtab for %s is already read in."), pst
->filename
);
2366 printf_filtered (_("Reading in symbols for %s..."), pst
->filename
);
2367 gdb_flush (gdb_stdout
);
2370 /* Restore our global data. */
2371 dwarf2_per_objfile
= objfile_data (pst
->objfile
,
2372 dwarf2_objfile_data_key
);
2374 psymtab_to_symtab_1 (pst
);
2376 /* Finish up the debug error message. */
2378 printf_filtered (_("done.\n"));
2383 /* Add PER_CU to the queue. */
2386 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2388 struct dwarf2_queue_item
*item
;
2391 item
= xmalloc (sizeof (*item
));
2392 item
->per_cu
= per_cu
;
2395 if (dwarf2_queue
== NULL
)
2396 dwarf2_queue
= item
;
2398 dwarf2_queue_tail
->next
= item
;
2400 dwarf2_queue_tail
= item
;
2403 /* Process the queue. */
2406 process_queue (struct objfile
*objfile
)
2408 struct dwarf2_queue_item
*item
, *next_item
;
2410 /* Initially, there is just one item on the queue. Load its DIEs,
2411 and the DIEs of any other compilation units it requires,
2414 for (item
= dwarf2_queue
; item
!= NULL
; item
= item
->next
)
2416 /* Read in this compilation unit. This may add new items to
2417 the end of the queue. */
2418 load_full_comp_unit (item
->per_cu
, objfile
);
2420 item
->per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
2421 dwarf2_per_objfile
->read_in_chain
= item
->per_cu
;
2423 /* If this compilation unit has already had full symbols created,
2424 reset the TYPE fields in each DIE. */
2425 if (item
->per_cu
->type_hash
)
2426 reset_die_and_siblings_types (item
->per_cu
->cu
->dies
,
2430 /* Now everything left on the queue needs to be read in. Process
2431 them, one at a time, removing from the queue as we finish. */
2432 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
2434 if (item
->per_cu
->psymtab
&& !item
->per_cu
->psymtab
->readin
)
2435 process_full_comp_unit (item
->per_cu
);
2437 item
->per_cu
->queued
= 0;
2438 next_item
= item
->next
;
2442 dwarf2_queue_tail
= NULL
;
2445 /* Free all allocated queue entries. This function only releases anything if
2446 an error was thrown; if the queue was processed then it would have been
2447 freed as we went along. */
2450 dwarf2_release_queue (void *dummy
)
2452 struct dwarf2_queue_item
*item
, *last
;
2454 item
= dwarf2_queue
;
2457 /* Anything still marked queued is likely to be in an
2458 inconsistent state, so discard it. */
2459 if (item
->per_cu
->queued
)
2461 if (item
->per_cu
->cu
!= NULL
)
2462 free_one_cached_comp_unit (item
->per_cu
->cu
);
2463 item
->per_cu
->queued
= 0;
2471 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
2474 /* Read in full symbols for PST, and anything it depends on. */
2477 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
2479 struct dwarf2_per_cu_data
*per_cu
;
2480 struct cleanup
*back_to
;
2483 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
2484 if (!pst
->dependencies
[i
]->readin
)
2486 /* Inform about additional files that need to be read in. */
2489 /* FIXME: i18n: Need to make this a single string. */
2490 fputs_filtered (" ", gdb_stdout
);
2492 fputs_filtered ("and ", gdb_stdout
);
2494 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
2495 wrap_here (""); /* Flush output */
2496 gdb_flush (gdb_stdout
);
2498 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
2501 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
2505 /* It's an include file, no symbols to read for it.
2506 Everything is in the parent symtab. */
2511 back_to
= make_cleanup (dwarf2_release_queue
, NULL
);
2513 queue_comp_unit (per_cu
);
2515 process_queue (pst
->objfile
);
2517 /* Age the cache, releasing compilation units that have not
2518 been used recently. */
2519 age_cached_comp_units ();
2521 do_cleanups (back_to
);
2524 /* Load the DIEs associated with PST and PER_CU into memory. */
2526 static struct dwarf2_cu
*
2527 load_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
, struct objfile
*objfile
)
2529 bfd
*abfd
= objfile
->obfd
;
2530 struct dwarf2_cu
*cu
;
2531 unsigned long offset
;
2533 struct cleanup
*back_to
, *free_cu_cleanup
;
2534 struct attribute
*attr
;
2537 /* Set local variables from the partial symbol table info. */
2538 offset
= per_cu
->offset
;
2540 info_ptr
= dwarf2_per_objfile
->info_buffer
+ offset
;
2542 cu
= xmalloc (sizeof (struct dwarf2_cu
));
2543 memset (cu
, 0, sizeof (struct dwarf2_cu
));
2545 /* If an error occurs while loading, release our storage. */
2546 free_cu_cleanup
= make_cleanup (free_one_comp_unit
, cu
);
2548 cu
->objfile
= objfile
;
2550 /* read in the comp_unit header */
2551 info_ptr
= read_comp_unit_head (&cu
->header
, info_ptr
, abfd
);
2553 /* Read the abbrevs for this compilation unit */
2554 dwarf2_read_abbrevs (abfd
, cu
);
2555 back_to
= make_cleanup (dwarf2_free_abbrev_table
, cu
);
2557 cu
->header
.offset
= offset
;
2559 cu
->per_cu
= per_cu
;
2562 /* We use this obstack for block values in dwarf_alloc_block. */
2563 obstack_init (&cu
->comp_unit_obstack
);
2565 cu
->dies
= read_comp_unit (info_ptr
, abfd
, cu
);
2567 /* We try not to read any attributes in this function, because not
2568 all objfiles needed for references have been loaded yet, and symbol
2569 table processing isn't initialized. But we have to set the CU language,
2570 or we won't be able to build types correctly. */
2571 attr
= dwarf2_attr (cu
->dies
, DW_AT_language
, cu
);
2573 set_cu_language (DW_UNSND (attr
), cu
);
2575 set_cu_language (language_minimal
, cu
);
2577 do_cleanups (back_to
);
2579 /* We've successfully allocated this compilation unit. Let our caller
2580 clean it up when finished with it. */
2581 discard_cleanups (free_cu_cleanup
);
2586 /* Generate full symbol information for PST and CU, whose DIEs have
2587 already been loaded into memory. */
2590 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
)
2592 struct partial_symtab
*pst
= per_cu
->psymtab
;
2593 struct dwarf2_cu
*cu
= per_cu
->cu
;
2594 struct objfile
*objfile
= pst
->objfile
;
2595 bfd
*abfd
= objfile
->obfd
;
2596 CORE_ADDR lowpc
, highpc
;
2597 struct symtab
*symtab
;
2598 struct cleanup
*back_to
;
2599 struct attribute
*attr
;
2602 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2604 /* We're in the global namespace. */
2605 processing_current_prefix
= "";
2608 back_to
= make_cleanup (really_free_pendings
, NULL
);
2610 cu
->list_in_scope
= &file_symbols
;
2612 /* Find the base address of the compilation unit for range lists and
2613 location lists. It will normally be specified by DW_AT_low_pc.
2614 In DWARF-3 draft 4, the base address could be overridden by
2615 DW_AT_entry_pc. It's been removed, but GCC still uses this for
2616 compilation units with discontinuous ranges. */
2618 cu
->header
.base_known
= 0;
2619 cu
->header
.base_address
= 0;
2621 attr
= dwarf2_attr (cu
->dies
, DW_AT_entry_pc
, cu
);
2624 cu
->header
.base_address
= DW_ADDR (attr
);
2625 cu
->header
.base_known
= 1;
2629 attr
= dwarf2_attr (cu
->dies
, DW_AT_low_pc
, cu
);
2632 cu
->header
.base_address
= DW_ADDR (attr
);
2633 cu
->header
.base_known
= 1;
2637 /* Do line number decoding in read_file_scope () */
2638 process_die (cu
->dies
, cu
);
2640 /* Some compilers don't define a DW_AT_high_pc attribute for the
2641 compilation unit. If the DW_AT_high_pc is missing, synthesize
2642 it, by scanning the DIE's below the compilation unit. */
2643 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
2645 symtab
= end_symtab (highpc
+ baseaddr
, objfile
, SECT_OFF_TEXT (objfile
));
2647 /* Set symtab language to language from DW_AT_language.
2648 If the compilation is from a C file generated by language preprocessors,
2649 do not set the language if it was already deduced by start_subfile. */
2651 && !(cu
->language
== language_c
&& symtab
->language
!= language_c
))
2653 symtab
->language
= cu
->language
;
2655 pst
->symtab
= symtab
;
2658 do_cleanups (back_to
);
2661 /* Process a die and its children. */
2664 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
2668 case DW_TAG_padding
:
2670 case DW_TAG_compile_unit
:
2671 read_file_scope (die
, cu
);
2673 case DW_TAG_subprogram
:
2674 read_subroutine_type (die
, cu
);
2675 read_func_scope (die
, cu
);
2677 case DW_TAG_inlined_subroutine
:
2678 /* FIXME: These are ignored for now.
2679 They could be used to set breakpoints on all inlined instances
2680 of a function and make GDB `next' properly over inlined functions. */
2682 case DW_TAG_lexical_block
:
2683 case DW_TAG_try_block
:
2684 case DW_TAG_catch_block
:
2685 read_lexical_block_scope (die
, cu
);
2687 case DW_TAG_class_type
:
2688 case DW_TAG_structure_type
:
2689 case DW_TAG_union_type
:
2690 read_structure_type (die
, cu
);
2691 process_structure_scope (die
, cu
);
2693 case DW_TAG_enumeration_type
:
2694 read_enumeration_type (die
, cu
);
2695 process_enumeration_scope (die
, cu
);
2698 /* FIXME drow/2004-03-14: These initialize die->type, but do not create
2699 a symbol or process any children. Therefore it doesn't do anything
2700 that won't be done on-demand by read_type_die. */
2701 case DW_TAG_subroutine_type
:
2702 read_subroutine_type (die
, cu
);
2704 case DW_TAG_set_type
:
2705 read_set_type (die
, cu
);
2707 case DW_TAG_array_type
:
2708 read_array_type (die
, cu
);
2710 case DW_TAG_pointer_type
:
2711 read_tag_pointer_type (die
, cu
);
2713 case DW_TAG_ptr_to_member_type
:
2714 read_tag_ptr_to_member_type (die
, cu
);
2716 case DW_TAG_reference_type
:
2717 read_tag_reference_type (die
, cu
);
2719 case DW_TAG_string_type
:
2720 read_tag_string_type (die
, cu
);
2724 case DW_TAG_base_type
:
2725 read_base_type (die
, cu
);
2726 /* Add a typedef symbol for the type definition, if it has a
2728 new_symbol (die
, die
->type
, cu
);
2730 case DW_TAG_subrange_type
:
2731 read_subrange_type (die
, cu
);
2732 /* Add a typedef symbol for the type definition, if it has a
2734 new_symbol (die
, die
->type
, cu
);
2736 case DW_TAG_common_block
:
2737 read_common_block (die
, cu
);
2739 case DW_TAG_common_inclusion
:
2741 case DW_TAG_namespace
:
2742 processing_has_namespace_info
= 1;
2743 read_namespace (die
, cu
);
2745 case DW_TAG_imported_declaration
:
2746 case DW_TAG_imported_module
:
2747 /* FIXME: carlton/2002-10-16: Eventually, we should use the
2748 information contained in these. DW_TAG_imported_declaration
2749 dies shouldn't have children; DW_TAG_imported_module dies
2750 shouldn't in the C++ case, but conceivably could in the
2751 Fortran case, so we'll have to replace this gdb_assert if
2752 Fortran compilers start generating that info. */
2753 processing_has_namespace_info
= 1;
2754 gdb_assert (die
->child
== NULL
);
2757 new_symbol (die
, NULL
, cu
);
2763 initialize_cu_func_list (struct dwarf2_cu
*cu
)
2765 cu
->first_fn
= cu
->last_fn
= cu
->cached_fn
= NULL
;
2769 free_cu_line_header (void *arg
)
2771 struct dwarf2_cu
*cu
= arg
;
2773 free_line_header (cu
->line_header
);
2774 cu
->line_header
= NULL
;
2778 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2780 struct objfile
*objfile
= cu
->objfile
;
2781 struct comp_unit_head
*cu_header
= &cu
->header
;
2782 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
2783 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
2784 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
2785 struct attribute
*attr
;
2787 char *comp_dir
= NULL
;
2788 struct die_info
*child_die
;
2789 bfd
*abfd
= objfile
->obfd
;
2790 struct line_header
*line_header
= 0;
2793 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2795 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
2797 /* If we didn't find a lowpc, set it to highpc to avoid complaints
2798 from finish_block. */
2799 if (lowpc
== ((CORE_ADDR
) -1))
2804 /* Find the filename. Do not use dwarf2_name here, since the filename
2805 is not a source language identifier. */
2806 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
2809 name
= DW_STRING (attr
);
2812 attr
= dwarf2_attr (die
, DW_AT_comp_dir
, cu
);
2814 comp_dir
= DW_STRING (attr
);
2815 else if (name
!= NULL
&& IS_ABSOLUTE_PATH (name
))
2817 comp_dir
= ldirname (name
);
2818 if (comp_dir
!= NULL
)
2819 make_cleanup (xfree
, comp_dir
);
2821 if (comp_dir
!= NULL
)
2823 /* Irix 6.2 native cc prepends <machine>.: to the compilation
2824 directory, get rid of it. */
2825 char *cp
= strchr (comp_dir
, ':');
2827 if (cp
&& cp
!= comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
2834 attr
= dwarf2_attr (die
, DW_AT_language
, cu
);
2837 set_cu_language (DW_UNSND (attr
), cu
);
2840 attr
= dwarf2_attr (die
, DW_AT_producer
, cu
);
2842 cu
->producer
= DW_STRING (attr
);
2844 /* We assume that we're processing GCC output. */
2845 processing_gcc_compilation
= 2;
2847 /* The compilation unit may be in a different language or objfile,
2848 zero out all remembered fundamental types. */
2849 memset (cu
->ftypes
, 0, FT_NUM_MEMBERS
* sizeof (struct type
*));
2851 start_symtab (name
, comp_dir
, lowpc
);
2852 record_debugformat ("DWARF 2");
2853 record_producer (cu
->producer
);
2855 initialize_cu_func_list (cu
);
2857 /* Decode line number information if present. We do this before
2858 processing child DIEs, so that the line header table is available
2859 for DW_AT_decl_file. */
2860 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
2863 unsigned int line_offset
= DW_UNSND (attr
);
2864 line_header
= dwarf_decode_line_header (line_offset
, abfd
, cu
);
2867 cu
->line_header
= line_header
;
2868 make_cleanup (free_cu_line_header
, cu
);
2869 dwarf_decode_lines (line_header
, comp_dir
, abfd
, cu
, NULL
);
2873 /* Process all dies in compilation unit. */
2874 if (die
->child
!= NULL
)
2876 child_die
= die
->child
;
2877 while (child_die
&& child_die
->tag
)
2879 process_die (child_die
, cu
);
2880 child_die
= sibling_die (child_die
);
2884 /* Decode macro information, if present. Dwarf 2 macro information
2885 refers to information in the line number info statement program
2886 header, so we can only read it if we've read the header
2888 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
2889 if (attr
&& line_header
)
2891 unsigned int macro_offset
= DW_UNSND (attr
);
2892 dwarf_decode_macros (line_header
, macro_offset
,
2893 comp_dir
, abfd
, cu
);
2895 do_cleanups (back_to
);
2899 add_to_cu_func_list (const char *name
, CORE_ADDR lowpc
, CORE_ADDR highpc
,
2900 struct dwarf2_cu
*cu
)
2902 struct function_range
*thisfn
;
2904 thisfn
= (struct function_range
*)
2905 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct function_range
));
2906 thisfn
->name
= name
;
2907 thisfn
->lowpc
= lowpc
;
2908 thisfn
->highpc
= highpc
;
2909 thisfn
->seen_line
= 0;
2910 thisfn
->next
= NULL
;
2912 if (cu
->last_fn
== NULL
)
2913 cu
->first_fn
= thisfn
;
2915 cu
->last_fn
->next
= thisfn
;
2917 cu
->last_fn
= thisfn
;
2921 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
2923 struct objfile
*objfile
= cu
->objfile
;
2924 struct context_stack
*new;
2927 struct die_info
*child_die
;
2928 struct attribute
*attr
;
2930 const char *previous_prefix
= processing_current_prefix
;
2931 struct cleanup
*back_to
= NULL
;
2934 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2936 name
= dwarf2_linkage_name (die
, cu
);
2938 /* Ignore functions with missing or empty names and functions with
2939 missing or invalid low and high pc attributes. */
2940 if (name
== NULL
|| !dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
2943 if (cu
->language
== language_cplus
2944 || cu
->language
== language_java
)
2946 struct die_info
*spec_die
= die_specification (die
, cu
);
2948 /* NOTE: carlton/2004-01-23: We have to be careful in the
2949 presence of DW_AT_specification. For example, with GCC 3.4,
2954 // Definition of N::foo.
2958 then we'll have a tree of DIEs like this:
2960 1: DW_TAG_compile_unit
2961 2: DW_TAG_namespace // N
2962 3: DW_TAG_subprogram // declaration of N::foo
2963 4: DW_TAG_subprogram // definition of N::foo
2964 DW_AT_specification // refers to die #3
2966 Thus, when processing die #4, we have to pretend that we're
2967 in the context of its DW_AT_specification, namely the contex
2970 if (spec_die
!= NULL
)
2972 char *specification_prefix
= determine_prefix (spec_die
, cu
);
2973 processing_current_prefix
= specification_prefix
;
2974 back_to
= make_cleanup (xfree
, specification_prefix
);
2981 /* Record the function range for dwarf_decode_lines. */
2982 add_to_cu_func_list (name
, lowpc
, highpc
, cu
);
2984 new = push_context (0, lowpc
);
2985 new->name
= new_symbol (die
, die
->type
, cu
);
2987 /* If there is a location expression for DW_AT_frame_base, record
2989 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
2991 /* FIXME: cagney/2004-01-26: The DW_AT_frame_base's location
2992 expression is being recorded directly in the function's symbol
2993 and not in a separate frame-base object. I guess this hack is
2994 to avoid adding some sort of frame-base adjunct/annex to the
2995 function's symbol :-(. The problem with doing this is that it
2996 results in a function symbol with a location expression that
2997 has nothing to do with the location of the function, ouch! The
2998 relationship should be: a function's symbol has-a frame base; a
2999 frame-base has-a location expression. */
3000 dwarf2_symbol_mark_computed (attr
, new->name
, cu
);
3002 cu
->list_in_scope
= &local_symbols
;
3004 if (die
->child
!= NULL
)
3006 child_die
= die
->child
;
3007 while (child_die
&& child_die
->tag
)
3009 process_die (child_die
, cu
);
3010 child_die
= sibling_die (child_die
);
3014 new = pop_context ();
3015 /* Make a block for the local symbols within. */
3016 finish_block (new->name
, &local_symbols
, new->old_blocks
,
3017 lowpc
, highpc
, objfile
);
3019 /* In C++, we can have functions nested inside functions (e.g., when
3020 a function declares a class that has methods). This means that
3021 when we finish processing a function scope, we may need to go
3022 back to building a containing block's symbol lists. */
3023 local_symbols
= new->locals
;
3024 param_symbols
= new->params
;
3026 /* If we've finished processing a top-level function, subsequent
3027 symbols go in the file symbol list. */
3028 if (outermost_context_p ())
3029 cu
->list_in_scope
= &file_symbols
;
3031 processing_current_prefix
= previous_prefix
;
3032 if (back_to
!= NULL
)
3033 do_cleanups (back_to
);
3036 /* Process all the DIES contained within a lexical block scope. Start
3037 a new scope, process the dies, and then close the scope. */
3040 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
3042 struct objfile
*objfile
= cu
->objfile
;
3043 struct context_stack
*new;
3044 CORE_ADDR lowpc
, highpc
;
3045 struct die_info
*child_die
;
3048 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3050 /* Ignore blocks with missing or invalid low and high pc attributes. */
3051 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
3052 as multiple lexical blocks? Handling children in a sane way would
3053 be nasty. Might be easier to properly extend generic blocks to
3055 if (!dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
))
3060 push_context (0, lowpc
);
3061 if (die
->child
!= NULL
)
3063 child_die
= die
->child
;
3064 while (child_die
&& child_die
->tag
)
3066 process_die (child_die
, cu
);
3067 child_die
= sibling_die (child_die
);
3070 new = pop_context ();
3072 if (local_symbols
!= NULL
)
3074 finish_block (0, &local_symbols
, new->old_blocks
, new->start_addr
,
3077 local_symbols
= new->locals
;
3080 /* Get low and high pc attributes from a die. Return 1 if the attributes
3081 are present and valid, otherwise, return 0. Return -1 if the range is
3082 discontinuous, i.e. derived from DW_AT_ranges information. */
3084 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
3085 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
)
3087 struct objfile
*objfile
= cu
->objfile
;
3088 struct comp_unit_head
*cu_header
= &cu
->header
;
3089 struct attribute
*attr
;
3090 bfd
*obfd
= objfile
->obfd
;
3095 attr
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
3098 high
= DW_ADDR (attr
);
3099 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
3101 low
= DW_ADDR (attr
);
3103 /* Found high w/o low attribute. */
3106 /* Found consecutive range of addresses. */
3111 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
3114 unsigned int addr_size
= cu_header
->addr_size
;
3115 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
3116 /* Value of the DW_AT_ranges attribute is the offset in the
3117 .debug_ranges section. */
3118 unsigned int offset
= DW_UNSND (attr
);
3119 /* Base address selection entry. */
3127 found_base
= cu_header
->base_known
;
3128 base
= cu_header
->base_address
;
3130 if (offset
>= dwarf2_per_objfile
->ranges_size
)
3132 complaint (&symfile_complaints
,
3133 _("Offset %d out of bounds for DW_AT_ranges attribute"),
3137 buffer
= dwarf2_per_objfile
->ranges_buffer
+ offset
;
3139 /* Read in the largest possible address. */
3140 marker
= read_address (obfd
, buffer
, cu
, &dummy
);
3141 if ((marker
& mask
) == mask
)
3143 /* If we found the largest possible address, then
3144 read the base address. */
3145 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3146 buffer
+= 2 * addr_size
;
3147 offset
+= 2 * addr_size
;
3155 CORE_ADDR range_beginning
, range_end
;
3157 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
3158 buffer
+= addr_size
;
3159 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
3160 buffer
+= addr_size
;
3161 offset
+= 2 * addr_size
;
3163 /* An end of list marker is a pair of zero addresses. */
3164 if (range_beginning
== 0 && range_end
== 0)
3165 /* Found the end of list entry. */
3168 /* Each base address selection entry is a pair of 2 values.
3169 The first is the largest possible address, the second is
3170 the base address. Check for a base address here. */
3171 if ((range_beginning
& mask
) == mask
)
3173 /* If we found the largest possible address, then
3174 read the base address. */
3175 base
= read_address (obfd
, buffer
+ addr_size
, cu
, &dummy
);
3182 /* We have no valid base address for the ranges
3184 complaint (&symfile_complaints
,
3185 _("Invalid .debug_ranges data (no base address)"));
3189 range_beginning
+= base
;
3192 /* FIXME: This is recording everything as a low-high
3193 segment of consecutive addresses. We should have a
3194 data structure for discontiguous block ranges
3198 low
= range_beginning
;
3204 if (range_beginning
< low
)
3205 low
= range_beginning
;
3206 if (range_end
> high
)
3212 /* If the first entry is an end-of-list marker, the range
3213 describes an empty scope, i.e. no instructions. */
3223 /* When using the GNU linker, .gnu.linkonce. sections are used to
3224 eliminate duplicate copies of functions and vtables and such.
3225 The linker will arbitrarily choose one and discard the others.
3226 The AT_*_pc values for such functions refer to local labels in
3227 these sections. If the section from that file was discarded, the
3228 labels are not in the output, so the relocs get a value of 0.
3229 If this is a discarded function, mark the pc bounds as invalid,
3230 so that GDB will ignore it. */
3231 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3239 /* Get the low and high pc's represented by the scope DIE, and store
3240 them in *LOWPC and *HIGHPC. If the correct values can't be
3241 determined, set *LOWPC to -1 and *HIGHPC to 0. */
3244 get_scope_pc_bounds (struct die_info
*die
,
3245 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
3246 struct dwarf2_cu
*cu
)
3248 CORE_ADDR best_low
= (CORE_ADDR
) -1;
3249 CORE_ADDR best_high
= (CORE_ADDR
) 0;
3250 CORE_ADDR current_low
, current_high
;
3252 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
))
3254 best_low
= current_low
;
3255 best_high
= current_high
;
3259 struct die_info
*child
= die
->child
;
3261 while (child
&& child
->tag
)
3263 switch (child
->tag
) {
3264 case DW_TAG_subprogram
:
3265 if (dwarf2_get_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
))
3267 best_low
= min (best_low
, current_low
);
3268 best_high
= max (best_high
, current_high
);
3271 case DW_TAG_namespace
:
3272 /* FIXME: carlton/2004-01-16: Should we do this for
3273 DW_TAG_class_type/DW_TAG_structure_type, too? I think
3274 that current GCC's always emit the DIEs corresponding
3275 to definitions of methods of classes as children of a
3276 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
3277 the DIEs giving the declarations, which could be
3278 anywhere). But I don't see any reason why the
3279 standards says that they have to be there. */
3280 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
3282 if (current_low
!= ((CORE_ADDR
) -1))
3284 best_low
= min (best_low
, current_low
);
3285 best_high
= max (best_high
, current_high
);
3293 child
= sibling_die (child
);
3298 *highpc
= best_high
;
3301 /* Add an aggregate field to the field list. */
3304 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
3305 struct dwarf2_cu
*cu
)
3307 struct objfile
*objfile
= cu
->objfile
;
3308 struct nextfield
*new_field
;
3309 struct attribute
*attr
;
3311 char *fieldname
= "";
3313 /* Allocate a new field list entry and link it in. */
3314 new_field
= (struct nextfield
*) xmalloc (sizeof (struct nextfield
));
3315 make_cleanup (xfree
, new_field
);
3316 memset (new_field
, 0, sizeof (struct nextfield
));
3317 new_field
->next
= fip
->fields
;
3318 fip
->fields
= new_field
;
3321 /* Handle accessibility and virtuality of field.
3322 The default accessibility for members is public, the default
3323 accessibility for inheritance is private. */
3324 if (die
->tag
!= DW_TAG_inheritance
)
3325 new_field
->accessibility
= DW_ACCESS_public
;
3327 new_field
->accessibility
= DW_ACCESS_private
;
3328 new_field
->virtuality
= DW_VIRTUALITY_none
;
3330 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3332 new_field
->accessibility
= DW_UNSND (attr
);
3333 if (new_field
->accessibility
!= DW_ACCESS_public
)
3334 fip
->non_public_fields
= 1;
3335 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
3337 new_field
->virtuality
= DW_UNSND (attr
);
3339 fp
= &new_field
->field
;
3341 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
3343 /* Data member other than a C++ static data member. */
3345 /* Get type of field. */
3346 fp
->type
= die_type (die
, cu
);
3348 FIELD_STATIC_KIND (*fp
) = 0;
3350 /* Get bit size of field (zero if none). */
3351 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
3354 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
3358 FIELD_BITSIZE (*fp
) = 0;
3361 /* Get bit offset of field. */
3362 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3365 FIELD_BITPOS (*fp
) =
3366 decode_locdesc (DW_BLOCK (attr
), cu
) * bits_per_byte
;
3369 FIELD_BITPOS (*fp
) = 0;
3370 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
3373 if (BITS_BIG_ENDIAN
)
3375 /* For big endian bits, the DW_AT_bit_offset gives the
3376 additional bit offset from the MSB of the containing
3377 anonymous object to the MSB of the field. We don't
3378 have to do anything special since we don't need to
3379 know the size of the anonymous object. */
3380 FIELD_BITPOS (*fp
) += DW_UNSND (attr
);
3384 /* For little endian bits, compute the bit offset to the
3385 MSB of the anonymous object, subtract off the number of
3386 bits from the MSB of the field to the MSB of the
3387 object, and then subtract off the number of bits of
3388 the field itself. The result is the bit offset of
3389 the LSB of the field. */
3391 int bit_offset
= DW_UNSND (attr
);
3393 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3396 /* The size of the anonymous object containing
3397 the bit field is explicit, so use the
3398 indicated size (in bytes). */
3399 anonymous_size
= DW_UNSND (attr
);
3403 /* The size of the anonymous object containing
3404 the bit field must be inferred from the type
3405 attribute of the data member containing the
3407 anonymous_size
= TYPE_LENGTH (fp
->type
);
3409 FIELD_BITPOS (*fp
) += anonymous_size
* bits_per_byte
3410 - bit_offset
- FIELD_BITSIZE (*fp
);
3414 /* Get name of field. */
3415 fieldname
= dwarf2_name (die
, cu
);
3416 if (fieldname
== NULL
)
3419 /* The name is already allocated along with this objfile, so we don't
3420 need to duplicate it for the type. */
3421 fp
->name
= fieldname
;
3423 /* Change accessibility for artificial fields (e.g. virtual table
3424 pointer or virtual base class pointer) to private. */
3425 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
3427 new_field
->accessibility
= DW_ACCESS_private
;
3428 fip
->non_public_fields
= 1;
3431 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
3433 /* C++ static member. */
3435 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
3436 is a declaration, but all versions of G++ as of this writing
3437 (so through at least 3.2.1) incorrectly generate
3438 DW_TAG_variable tags. */
3442 /* Get name of field. */
3443 fieldname
= dwarf2_name (die
, cu
);
3444 if (fieldname
== NULL
)
3447 /* Get physical name. */
3448 physname
= dwarf2_linkage_name (die
, cu
);
3450 /* The name is already allocated along with this objfile, so we don't
3451 need to duplicate it for the type. */
3452 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
3453 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3454 FIELD_NAME (*fp
) = fieldname
;
3456 else if (die
->tag
== DW_TAG_inheritance
)
3458 /* C++ base class field. */
3459 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
3461 FIELD_BITPOS (*fp
) = (decode_locdesc (DW_BLOCK (attr
), cu
)
3463 FIELD_BITSIZE (*fp
) = 0;
3464 FIELD_STATIC_KIND (*fp
) = 0;
3465 FIELD_TYPE (*fp
) = die_type (die
, cu
);
3466 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
3467 fip
->nbaseclasses
++;
3471 /* Create the vector of fields, and attach it to the type. */
3474 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
3475 struct dwarf2_cu
*cu
)
3477 int nfields
= fip
->nfields
;
3479 /* Record the field count, allocate space for the array of fields,
3480 and create blank accessibility bitfields if necessary. */
3481 TYPE_NFIELDS (type
) = nfields
;
3482 TYPE_FIELDS (type
) = (struct field
*)
3483 TYPE_ALLOC (type
, sizeof (struct field
) * nfields
);
3484 memset (TYPE_FIELDS (type
), 0, sizeof (struct field
) * nfields
);
3486 if (fip
->non_public_fields
)
3488 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3490 TYPE_FIELD_PRIVATE_BITS (type
) =
3491 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3492 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
3494 TYPE_FIELD_PROTECTED_BITS (type
) =
3495 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3496 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
3498 TYPE_FIELD_IGNORE_BITS (type
) =
3499 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
3500 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
3503 /* If the type has baseclasses, allocate and clear a bit vector for
3504 TYPE_FIELD_VIRTUAL_BITS. */
3505 if (fip
->nbaseclasses
)
3507 int num_bytes
= B_BYTES (fip
->nbaseclasses
);
3508 unsigned char *pointer
;
3510 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3511 pointer
= TYPE_ALLOC (type
, num_bytes
);
3512 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
3513 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->nbaseclasses
);
3514 TYPE_N_BASECLASSES (type
) = fip
->nbaseclasses
;
3517 /* Copy the saved-up fields into the field vector. Start from the head
3518 of the list, adding to the tail of the field array, so that they end
3519 up in the same order in the array in which they were added to the list. */
3520 while (nfields
-- > 0)
3522 TYPE_FIELD (type
, nfields
) = fip
->fields
->field
;
3523 switch (fip
->fields
->accessibility
)
3525 case DW_ACCESS_private
:
3526 SET_TYPE_FIELD_PRIVATE (type
, nfields
);
3529 case DW_ACCESS_protected
:
3530 SET_TYPE_FIELD_PROTECTED (type
, nfields
);
3533 case DW_ACCESS_public
:
3537 /* Unknown accessibility. Complain and treat it as public. */
3539 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
3540 fip
->fields
->accessibility
);
3544 if (nfields
< fip
->nbaseclasses
)
3546 switch (fip
->fields
->virtuality
)
3548 case DW_VIRTUALITY_virtual
:
3549 case DW_VIRTUALITY_pure_virtual
:
3550 SET_TYPE_FIELD_VIRTUAL (type
, nfields
);
3554 fip
->fields
= fip
->fields
->next
;
3558 /* Add a member function to the proper fieldlist. */
3561 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
3562 struct type
*type
, struct dwarf2_cu
*cu
)
3564 struct objfile
*objfile
= cu
->objfile
;
3565 struct attribute
*attr
;
3566 struct fnfieldlist
*flp
;
3568 struct fn_field
*fnp
;
3571 struct nextfnfield
*new_fnfield
;
3573 /* Get name of member function. */
3574 fieldname
= dwarf2_name (die
, cu
);
3575 if (fieldname
== NULL
)
3578 /* Get the mangled name. */
3579 physname
= dwarf2_linkage_name (die
, cu
);
3581 /* Look up member function name in fieldlist. */
3582 for (i
= 0; i
< fip
->nfnfields
; i
++)
3584 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
3588 /* Create new list element if necessary. */
3589 if (i
< fip
->nfnfields
)
3590 flp
= &fip
->fnfieldlists
[i
];
3593 if ((fip
->nfnfields
% DW_FIELD_ALLOC_CHUNK
) == 0)
3595 fip
->fnfieldlists
= (struct fnfieldlist
*)
3596 xrealloc (fip
->fnfieldlists
,
3597 (fip
->nfnfields
+ DW_FIELD_ALLOC_CHUNK
)
3598 * sizeof (struct fnfieldlist
));
3599 if (fip
->nfnfields
== 0)
3600 make_cleanup (free_current_contents
, &fip
->fnfieldlists
);
3602 flp
= &fip
->fnfieldlists
[fip
->nfnfields
];
3603 flp
->name
= fieldname
;
3609 /* Create a new member function field and chain it to the field list
3611 new_fnfield
= (struct nextfnfield
*) xmalloc (sizeof (struct nextfnfield
));
3612 make_cleanup (xfree
, new_fnfield
);
3613 memset (new_fnfield
, 0, sizeof (struct nextfnfield
));
3614 new_fnfield
->next
= flp
->head
;
3615 flp
->head
= new_fnfield
;
3618 /* Fill in the member function field info. */
3619 fnp
= &new_fnfield
->fnfield
;
3620 /* The name is already allocated along with this objfile, so we don't
3621 need to duplicate it for the type. */
3622 fnp
->physname
= physname
? physname
: "";
3623 fnp
->type
= alloc_type (objfile
);
3624 if (die
->type
&& TYPE_CODE (die
->type
) == TYPE_CODE_FUNC
)
3626 int nparams
= TYPE_NFIELDS (die
->type
);
3628 /* TYPE is the domain of this method, and DIE->TYPE is the type
3629 of the method itself (TYPE_CODE_METHOD). */
3630 smash_to_method_type (fnp
->type
, type
,
3631 TYPE_TARGET_TYPE (die
->type
),
3632 TYPE_FIELDS (die
->type
),
3633 TYPE_NFIELDS (die
->type
),
3634 TYPE_VARARGS (die
->type
));
3636 /* Handle static member functions.
3637 Dwarf2 has no clean way to discern C++ static and non-static
3638 member functions. G++ helps GDB by marking the first
3639 parameter for non-static member functions (which is the
3640 this pointer) as artificial. We obtain this information
3641 from read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
3642 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (die
->type
, 0) == 0)
3643 fnp
->voffset
= VOFFSET_STATIC
;
3646 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
3649 /* Get fcontext from DW_AT_containing_type if present. */
3650 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3651 fnp
->fcontext
= die_containing_type (die
, cu
);
3653 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const
3654 and is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
3656 /* Get accessibility. */
3657 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
3660 switch (DW_UNSND (attr
))
3662 case DW_ACCESS_private
:
3663 fnp
->is_private
= 1;
3665 case DW_ACCESS_protected
:
3666 fnp
->is_protected
= 1;
3671 /* Check for artificial methods. */
3672 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
3673 if (attr
&& DW_UNSND (attr
) != 0)
3674 fnp
->is_artificial
= 1;
3676 /* Get index in virtual function table if it is a virtual member function. */
3677 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
3680 /* Support the .debug_loc offsets */
3681 if (attr_form_is_block (attr
))
3683 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
3685 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
3687 dwarf2_complex_location_expr_complaint ();
3691 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
3697 /* Create the vector of member function fields, and attach it to the type. */
3700 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
3701 struct dwarf2_cu
*cu
)
3703 struct fnfieldlist
*flp
;
3704 int total_length
= 0;
3707 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
3708 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
3709 TYPE_ALLOC (type
, sizeof (struct fn_fieldlist
) * fip
->nfnfields
);
3711 for (i
= 0, flp
= fip
->fnfieldlists
; i
< fip
->nfnfields
; i
++, flp
++)
3713 struct nextfnfield
*nfp
= flp
->head
;
3714 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
3717 TYPE_FN_FIELDLIST_NAME (type
, i
) = flp
->name
;
3718 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = flp
->length
;
3719 fn_flp
->fn_fields
= (struct fn_field
*)
3720 TYPE_ALLOC (type
, sizeof (struct fn_field
) * flp
->length
);
3721 for (k
= flp
->length
; (k
--, nfp
); nfp
= nfp
->next
)
3722 fn_flp
->fn_fields
[k
] = nfp
->fnfield
;
3724 total_length
+= flp
->length
;
3727 TYPE_NFN_FIELDS (type
) = fip
->nfnfields
;
3728 TYPE_NFN_FIELDS_TOTAL (type
) = total_length
;
3731 /* Returns non-zero if NAME is the name of a vtable member in CU's
3732 language, zero otherwise. */
3734 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
3736 static const char vptr
[] = "_vptr";
3737 static const char vtable
[] = "vtable";
3739 /* Look for the C++ and Java forms of the vtable. */
3740 if ((cu
->language
== language_java
3741 && strncmp (name
, vtable
, sizeof (vtable
) - 1) == 0)
3742 || (strncmp (name
, vptr
, sizeof (vptr
) - 1) == 0
3743 && is_cplus_marker (name
[sizeof (vptr
) - 1])))
3749 /* GCC outputs unnamed structures that are really pointers to member
3750 functions, with the ABI-specified layout. If DIE (from CU) describes
3751 such a structure, set its type, and return nonzero. Otherwise return
3754 GCC shouldn't do this; it should just output pointer to member DIEs.
3755 This is GCC PR debug/28767. */
3758 quirk_gcc_member_function_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
)
3760 struct objfile
*objfile
= cu
->objfile
;
3762 struct die_info
*pfn_die
, *delta_die
;
3763 struct attribute
*pfn_name
, *delta_name
;
3764 struct type
*pfn_type
, *domain_type
;
3766 /* Check for a structure with no name and two children. */
3767 if (die
->tag
!= DW_TAG_structure_type
3768 || dwarf2_attr (die
, DW_AT_name
, cu
) != NULL
3769 || die
->child
== NULL
3770 || die
->child
->sibling
== NULL
3771 || (die
->child
->sibling
->sibling
!= NULL
3772 && die
->child
->sibling
->sibling
->tag
!= DW_TAG_padding
))
3775 /* Check for __pfn and __delta members. */
3776 pfn_die
= die
->child
;
3777 pfn_name
= dwarf2_attr (pfn_die
, DW_AT_name
, cu
);
3778 if (pfn_die
->tag
!= DW_TAG_member
3780 || DW_STRING (pfn_name
) == NULL
3781 || strcmp ("__pfn", DW_STRING (pfn_name
)) != 0)
3784 delta_die
= pfn_die
->sibling
;
3785 delta_name
= dwarf2_attr (delta_die
, DW_AT_name
, cu
);
3786 if (delta_die
->tag
!= DW_TAG_member
3787 || delta_name
== NULL
3788 || DW_STRING (delta_name
) == NULL
3789 || strcmp ("__delta", DW_STRING (delta_name
)) != 0)
3792 /* Find the type of the method. */
3793 pfn_type
= die_type (pfn_die
, cu
);
3794 if (pfn_type
== NULL
3795 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
3796 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
3799 /* Look for the "this" argument. */
3800 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
3801 if (TYPE_NFIELDS (pfn_type
) == 0
3802 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
3805 domain_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
3806 type
= alloc_type (objfile
);
3807 smash_to_method_type (type
, domain_type
, TYPE_TARGET_TYPE (pfn_type
),
3808 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
3809 TYPE_VARARGS (pfn_type
));
3810 type
= lookup_methodptr_type (type
);
3811 set_die_type (die
, type
, cu
);
3816 /* Called when we find the DIE that starts a structure or union scope
3817 (definition) to process all dies that define the members of the
3820 NOTE: we need to call struct_type regardless of whether or not the
3821 DIE has an at_name attribute, since it might be an anonymous
3822 structure or union. This gets the type entered into our set of
3825 However, if the structure is incomplete (an opaque struct/union)
3826 then suppress creating a symbol table entry for it since gdb only
3827 wants to find the one with the complete definition. Note that if
3828 it is complete, we just call new_symbol, which does it's own
3829 checking about whether the struct/union is anonymous or not (and
3830 suppresses creating a symbol table entry itself). */
3833 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
3835 struct objfile
*objfile
= cu
->objfile
;
3837 struct attribute
*attr
;
3838 const char *previous_prefix
= processing_current_prefix
;
3839 struct cleanup
*back_to
= NULL
;
3845 if (quirk_gcc_member_function_pointer (die
, cu
))
3848 type
= alloc_type (objfile
);
3849 INIT_CPLUS_SPECIFIC (type
);
3850 name
= dwarf2_name (die
, cu
);
3853 if (cu
->language
== language_cplus
3854 || cu
->language
== language_java
)
3856 char *new_prefix
= determine_class_name (die
, cu
);
3857 TYPE_TAG_NAME (type
) = obsavestring (new_prefix
,
3858 strlen (new_prefix
),
3859 &objfile
->objfile_obstack
);
3860 back_to
= make_cleanup (xfree
, new_prefix
);
3861 processing_current_prefix
= new_prefix
;
3865 /* The name is already allocated along with this objfile, so
3866 we don't need to duplicate it for the type. */
3867 TYPE_TAG_NAME (type
) = name
;
3871 if (die
->tag
== DW_TAG_structure_type
)
3873 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
3875 else if (die
->tag
== DW_TAG_union_type
)
3877 TYPE_CODE (type
) = TYPE_CODE_UNION
;
3881 /* FIXME: TYPE_CODE_CLASS is currently defined to TYPE_CODE_STRUCT
3883 TYPE_CODE (type
) = TYPE_CODE_CLASS
;
3886 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
3889 TYPE_LENGTH (type
) = DW_UNSND (attr
);
3893 TYPE_LENGTH (type
) = 0;
3896 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB_SUPPORTED
;
3897 if (die_is_declaration (die
, cu
))
3898 TYPE_FLAGS (type
) |= TYPE_FLAG_STUB
;
3900 /* We need to add the type field to the die immediately so we don't
3901 infinitely recurse when dealing with pointers to the structure
3902 type within the structure itself. */
3903 set_die_type (die
, type
, cu
);
3905 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
3907 struct field_info fi
;
3908 struct die_info
*child_die
;
3909 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
3911 memset (&fi
, 0, sizeof (struct field_info
));
3913 child_die
= die
->child
;
3915 while (child_die
&& child_die
->tag
)
3917 if (child_die
->tag
== DW_TAG_member
3918 || child_die
->tag
== DW_TAG_variable
)
3920 /* NOTE: carlton/2002-11-05: A C++ static data member
3921 should be a DW_TAG_member that is a declaration, but
3922 all versions of G++ as of this writing (so through at
3923 least 3.2.1) incorrectly generate DW_TAG_variable
3924 tags for them instead. */
3925 dwarf2_add_field (&fi
, child_die
, cu
);
3927 else if (child_die
->tag
== DW_TAG_subprogram
)
3929 /* C++ member function. */
3930 read_type_die (child_die
, cu
);
3931 dwarf2_add_member_fn (&fi
, child_die
, type
, cu
);
3933 else if (child_die
->tag
== DW_TAG_inheritance
)
3935 /* C++ base class field. */
3936 dwarf2_add_field (&fi
, child_die
, cu
);
3938 child_die
= sibling_die (child_die
);
3941 /* Attach fields and member functions to the type. */
3943 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
3946 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
3948 /* Get the type which refers to the base class (possibly this
3949 class itself) which contains the vtable pointer for the current
3950 class from the DW_AT_containing_type attribute. */
3952 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
3954 struct type
*t
= die_containing_type (die
, cu
);
3956 TYPE_VPTR_BASETYPE (type
) = t
;
3961 /* Our own class provides vtbl ptr. */
3962 for (i
= TYPE_NFIELDS (t
) - 1;
3963 i
>= TYPE_N_BASECLASSES (t
);
3966 char *fieldname
= TYPE_FIELD_NAME (t
, i
);
3968 if (is_vtable_name (fieldname
, cu
))
3970 TYPE_VPTR_FIELDNO (type
) = i
;
3975 /* Complain if virtual function table field not found. */
3976 if (i
< TYPE_N_BASECLASSES (t
))
3977 complaint (&symfile_complaints
,
3978 _("virtual function table pointer not found when defining class '%s'"),
3979 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
3984 TYPE_VPTR_FIELDNO (type
) = TYPE_VPTR_FIELDNO (t
);
3987 else if (cu
->producer
3988 && strncmp (cu
->producer
,
3989 "IBM(R) XL C/C++ Advanced Edition", 32) == 0)
3991 /* The IBM XLC compiler does not provide direct indication
3992 of the containing type, but the vtable pointer is
3993 always named __vfp. */
3997 for (i
= TYPE_NFIELDS (type
) - 1;
3998 i
>= TYPE_N_BASECLASSES (type
);
4001 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
4003 TYPE_VPTR_FIELDNO (type
) = i
;
4004 TYPE_VPTR_BASETYPE (type
) = type
;
4011 do_cleanups (back_to
);
4014 processing_current_prefix
= previous_prefix
;
4015 if (back_to
!= NULL
)
4016 do_cleanups (back_to
);
4020 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4022 struct objfile
*objfile
= cu
->objfile
;
4023 const char *previous_prefix
= processing_current_prefix
;
4024 struct die_info
*child_die
= die
->child
;
4026 if (TYPE_TAG_NAME (die
->type
) != NULL
)
4027 processing_current_prefix
= TYPE_TAG_NAME (die
->type
);
4029 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
4030 snapshots) has been known to create a die giving a declaration
4031 for a class that has, as a child, a die giving a definition for a
4032 nested class. So we have to process our children even if the
4033 current die is a declaration. Normally, of course, a declaration
4034 won't have any children at all. */
4036 while (child_die
!= NULL
&& child_die
->tag
)
4038 if (child_die
->tag
== DW_TAG_member
4039 || child_die
->tag
== DW_TAG_variable
4040 || child_die
->tag
== DW_TAG_inheritance
)
4045 process_die (child_die
, cu
);
4047 child_die
= sibling_die (child_die
);
4050 /* Do not consider external references. According to the DWARF standard,
4051 these DIEs are identified by the fact that they have no byte_size
4052 attribute, and a declaration attribute. */
4053 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
4054 || !die_is_declaration (die
, cu
))
4055 new_symbol (die
, die
->type
, cu
);
4057 processing_current_prefix
= previous_prefix
;
4060 /* Given a DW_AT_enumeration_type die, set its type. We do not
4061 complete the type's fields yet, or create any symbols. */
4064 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4066 struct objfile
*objfile
= cu
->objfile
;
4068 struct attribute
*attr
;
4074 type
= alloc_type (objfile
);
4076 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
4077 name
= dwarf2_name (die
, cu
);
4080 if (processing_has_namespace_info
)
4082 TYPE_TAG_NAME (type
) = typename_concat (&objfile
->objfile_obstack
,
4083 processing_current_prefix
,
4088 /* The name is already allocated along with this objfile, so
4089 we don't need to duplicate it for the type. */
4090 TYPE_TAG_NAME (type
) = name
;
4094 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4097 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4101 TYPE_LENGTH (type
) = 0;
4104 set_die_type (die
, type
, cu
);
4107 /* Determine the name of the type represented by DIE, which should be
4108 a named C++ or Java compound type. Return the name in question; the caller
4109 is responsible for xfree()'ing it. */
4112 determine_class_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
4114 struct cleanup
*back_to
= NULL
;
4115 struct die_info
*spec_die
= die_specification (die
, cu
);
4116 char *new_prefix
= NULL
;
4118 /* If this is the definition of a class that is declared by another
4119 die, then processing_current_prefix may not be accurate; see
4120 read_func_scope for a similar example. */
4121 if (spec_die
!= NULL
)
4123 char *specification_prefix
= determine_prefix (spec_die
, cu
);
4124 processing_current_prefix
= specification_prefix
;
4125 back_to
= make_cleanup (xfree
, specification_prefix
);
4128 /* If we don't have namespace debug info, guess the name by trying
4129 to demangle the names of members, just like we did in
4130 guess_structure_name. */
4131 if (!processing_has_namespace_info
)
4133 struct die_info
*child
;
4135 for (child
= die
->child
;
4136 child
!= NULL
&& child
->tag
!= 0;
4137 child
= sibling_die (child
))
4139 if (child
->tag
== DW_TAG_subprogram
)
4142 = language_class_name_from_physname (cu
->language_defn
,
4146 if (new_prefix
!= NULL
)
4152 if (new_prefix
== NULL
)
4154 const char *name
= dwarf2_name (die
, cu
);
4155 new_prefix
= typename_concat (NULL
, processing_current_prefix
,
4156 name
? name
: "<<anonymous>>",
4160 if (back_to
!= NULL
)
4161 do_cleanups (back_to
);
4166 /* Given a pointer to a die which begins an enumeration, process all
4167 the dies that define the members of the enumeration, and create the
4168 symbol for the enumeration type.
4170 NOTE: We reverse the order of the element list. */
4173 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
4175 struct objfile
*objfile
= cu
->objfile
;
4176 struct die_info
*child_die
;
4177 struct field
*fields
;
4180 int unsigned_enum
= 1;
4185 if (die
->child
!= NULL
)
4187 child_die
= die
->child
;
4188 while (child_die
&& child_die
->tag
)
4190 if (child_die
->tag
!= DW_TAG_enumerator
)
4192 process_die (child_die
, cu
);
4196 name
= dwarf2_name (child_die
, cu
);
4199 sym
= new_symbol (child_die
, die
->type
, cu
);
4200 if (SYMBOL_VALUE (sym
) < 0)
4203 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
4205 fields
= (struct field
*)
4207 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
4208 * sizeof (struct field
));
4211 FIELD_NAME (fields
[num_fields
]) = DEPRECATED_SYMBOL_NAME (sym
);
4212 FIELD_TYPE (fields
[num_fields
]) = NULL
;
4213 FIELD_BITPOS (fields
[num_fields
]) = SYMBOL_VALUE (sym
);
4214 FIELD_BITSIZE (fields
[num_fields
]) = 0;
4215 FIELD_STATIC_KIND (fields
[num_fields
]) = 0;
4221 child_die
= sibling_die (child_die
);
4226 TYPE_NFIELDS (die
->type
) = num_fields
;
4227 TYPE_FIELDS (die
->type
) = (struct field
*)
4228 TYPE_ALLOC (die
->type
, sizeof (struct field
) * num_fields
);
4229 memcpy (TYPE_FIELDS (die
->type
), fields
,
4230 sizeof (struct field
) * num_fields
);
4234 TYPE_FLAGS (die
->type
) |= TYPE_FLAG_UNSIGNED
;
4237 new_symbol (die
, die
->type
, cu
);
4240 /* Extract all information from a DW_TAG_array_type DIE and put it in
4241 the DIE's type field. For now, this only handles one dimensional
4245 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4247 struct objfile
*objfile
= cu
->objfile
;
4248 struct die_info
*child_die
;
4249 struct type
*type
= NULL
;
4250 struct type
*element_type
, *range_type
, *index_type
;
4251 struct type
**range_types
= NULL
;
4252 struct attribute
*attr
;
4254 struct cleanup
*back_to
;
4257 /* Return if we've already decoded this type. */
4263 element_type
= die_type (die
, cu
);
4265 /* Irix 6.2 native cc creates array types without children for
4266 arrays with unspecified length. */
4267 if (die
->child
== NULL
)
4269 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
, cu
);
4270 range_type
= create_range_type (NULL
, index_type
, 0, -1);
4271 set_die_type (die
, create_array_type (NULL
, element_type
, range_type
),
4276 back_to
= make_cleanup (null_cleanup
, NULL
);
4277 child_die
= die
->child
;
4278 while (child_die
&& child_die
->tag
)
4280 if (child_die
->tag
== DW_TAG_subrange_type
)
4282 read_subrange_type (child_die
, cu
);
4284 if (child_die
->type
!= NULL
)
4286 /* The range type was succesfully read. Save it for
4287 the array type creation. */
4288 if ((ndim
% DW_FIELD_ALLOC_CHUNK
) == 0)
4290 range_types
= (struct type
**)
4291 xrealloc (range_types
, (ndim
+ DW_FIELD_ALLOC_CHUNK
)
4292 * sizeof (struct type
*));
4294 make_cleanup (free_current_contents
, &range_types
);
4296 range_types
[ndim
++] = child_die
->type
;
4299 child_die
= sibling_die (child_die
);
4302 /* Dwarf2 dimensions are output from left to right, create the
4303 necessary array types in backwards order. */
4305 type
= element_type
;
4307 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
4311 type
= create_array_type (NULL
, type
, range_types
[i
++]);
4316 type
= create_array_type (NULL
, type
, range_types
[ndim
]);
4319 /* Understand Dwarf2 support for vector types (like they occur on
4320 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
4321 array type. This is not part of the Dwarf2/3 standard yet, but a
4322 custom vendor extension. The main difference between a regular
4323 array and the vector variant is that vectors are passed by value
4325 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
4327 make_vector_type (type
);
4329 name
= dwarf2_name (die
, cu
);
4331 TYPE_NAME (type
) = name
;
4333 do_cleanups (back_to
);
4335 /* Install the type in the die. */
4336 set_die_type (die
, type
, cu
);
4339 static enum dwarf_array_dim_ordering
4340 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
4342 struct attribute
*attr
;
4344 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
4346 if (attr
) return DW_SND (attr
);
4349 GNU F77 is a special case, as at 08/2004 array type info is the
4350 opposite order to the dwarf2 specification, but data is still
4351 laid out as per normal fortran.
4353 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
4357 if (cu
->language
== language_fortran
&&
4358 cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
4360 return DW_ORD_row_major
;
4363 switch (cu
->language_defn
->la_array_ordering
)
4365 case array_column_major
:
4366 return DW_ORD_col_major
;
4367 case array_row_major
:
4369 return DW_ORD_row_major
;
4373 /* Extract all information from a DW_TAG_set_type DIE and put it in
4374 the DIE's type field. */
4377 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4379 if (die
->type
== NULL
)
4380 die
->type
= create_set_type ((struct type
*) NULL
, die_type (die
, cu
));
4383 /* First cut: install each common block member as a global variable. */
4386 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
4388 struct die_info
*child_die
;
4389 struct attribute
*attr
;
4391 CORE_ADDR base
= (CORE_ADDR
) 0;
4393 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
4396 /* Support the .debug_loc offsets */
4397 if (attr_form_is_block (attr
))
4399 base
= decode_locdesc (DW_BLOCK (attr
), cu
);
4401 else if (attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
4403 dwarf2_complex_location_expr_complaint ();
4407 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
4408 "common block member");
4411 if (die
->child
!= NULL
)
4413 child_die
= die
->child
;
4414 while (child_die
&& child_die
->tag
)
4416 sym
= new_symbol (child_die
, NULL
, cu
);
4417 attr
= dwarf2_attr (child_die
, DW_AT_data_member_location
, cu
);
4420 SYMBOL_VALUE_ADDRESS (sym
) =
4421 base
+ decode_locdesc (DW_BLOCK (attr
), cu
);
4422 add_symbol_to_list (sym
, &global_symbols
);
4424 child_die
= sibling_die (child_die
);
4429 /* Read a C++ namespace. */
4432 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
4434 struct objfile
*objfile
= cu
->objfile
;
4435 const char *previous_prefix
= processing_current_prefix
;
4438 struct die_info
*current_die
;
4439 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
4441 name
= namespace_name (die
, &is_anonymous
, cu
);
4443 /* Now build the name of the current namespace. */
4445 if (previous_prefix
[0] == '\0')
4447 processing_current_prefix
= name
;
4451 char *temp_name
= typename_concat (NULL
, previous_prefix
, name
, cu
);
4452 make_cleanup (xfree
, temp_name
);
4453 processing_current_prefix
= temp_name
;
4456 /* Add a symbol associated to this if we haven't seen the namespace
4457 before. Also, add a using directive if it's an anonymous
4460 if (dwarf2_extension (die
, cu
) == NULL
)
4464 /* FIXME: carlton/2003-06-27: Once GDB is more const-correct,
4465 this cast will hopefully become unnecessary. */
4466 type
= init_type (TYPE_CODE_NAMESPACE
, 0, 0,
4467 (char *) processing_current_prefix
,
4469 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
4471 new_symbol (die
, type
, cu
);
4472 set_die_type (die
, type
, cu
);
4475 cp_add_using_directive (processing_current_prefix
,
4476 strlen (previous_prefix
),
4477 strlen (processing_current_prefix
));
4480 if (die
->child
!= NULL
)
4482 struct die_info
*child_die
= die
->child
;
4484 while (child_die
&& child_die
->tag
)
4486 process_die (child_die
, cu
);
4487 child_die
= sibling_die (child_die
);
4491 processing_current_prefix
= previous_prefix
;
4492 do_cleanups (back_to
);
4495 /* Return the name of the namespace represented by DIE. Set
4496 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
4500 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
4502 struct die_info
*current_die
;
4503 const char *name
= NULL
;
4505 /* Loop through the extensions until we find a name. */
4507 for (current_die
= die
;
4508 current_die
!= NULL
;
4509 current_die
= dwarf2_extension (die
, cu
))
4511 name
= dwarf2_name (current_die
, cu
);
4516 /* Is it an anonymous namespace? */
4518 *is_anonymous
= (name
== NULL
);
4520 name
= "(anonymous namespace)";
4525 /* Extract all information from a DW_TAG_pointer_type DIE and add to
4526 the user defined type vector. */
4529 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4531 struct comp_unit_head
*cu_header
= &cu
->header
;
4533 struct attribute
*attr_byte_size
;
4534 struct attribute
*attr_address_class
;
4535 int byte_size
, addr_class
;
4542 type
= lookup_pointer_type (die_type (die
, cu
));
4544 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4546 byte_size
= DW_UNSND (attr_byte_size
);
4548 byte_size
= cu_header
->addr_size
;
4550 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
4551 if (attr_address_class
)
4552 addr_class
= DW_UNSND (attr_address_class
);
4554 addr_class
= DW_ADDR_none
;
4556 /* If the pointer size or address class is different than the
4557 default, create a type variant marked as such and set the
4558 length accordingly. */
4559 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
4561 if (gdbarch_address_class_type_flags_p (current_gdbarch
))
4565 type_flags
= gdbarch_address_class_type_flags
4566 (current_gdbarch
, byte_size
, addr_class
);
4567 gdb_assert ((type_flags
& ~TYPE_FLAG_ADDRESS_CLASS_ALL
) == 0);
4568 type
= make_type_with_address_space (type
, type_flags
);
4570 else if (TYPE_LENGTH (type
) != byte_size
)
4572 complaint (&symfile_complaints
, _("invalid pointer size %d"), byte_size
);
4575 /* Should we also complain about unhandled address classes? */
4579 TYPE_LENGTH (type
) = byte_size
;
4580 set_die_type (die
, type
, cu
);
4583 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
4584 the user defined type vector. */
4587 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4589 struct objfile
*objfile
= cu
->objfile
;
4591 struct type
*to_type
;
4592 struct type
*domain
;
4599 to_type
= die_type (die
, cu
);
4600 domain
= die_containing_type (die
, cu
);
4602 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
4603 type
= lookup_methodptr_type (to_type
);
4605 type
= lookup_memberptr_type (to_type
, domain
);
4607 set_die_type (die
, type
, cu
);
4610 /* Extract all information from a DW_TAG_reference_type DIE and add to
4611 the user defined type vector. */
4614 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4616 struct comp_unit_head
*cu_header
= &cu
->header
;
4618 struct attribute
*attr
;
4625 type
= lookup_reference_type (die_type (die
, cu
));
4626 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4629 TYPE_LENGTH (type
) = DW_UNSND (attr
);
4633 TYPE_LENGTH (type
) = cu_header
->addr_size
;
4635 set_die_type (die
, type
, cu
);
4639 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4641 struct type
*base_type
;
4648 base_type
= die_type (die
, cu
);
4649 set_die_type (die
, make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0),
4654 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4656 struct type
*base_type
;
4663 base_type
= die_type (die
, cu
);
4664 set_die_type (die
, make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0),
4668 /* Extract all information from a DW_TAG_string_type DIE and add to
4669 the user defined type vector. It isn't really a user defined type,
4670 but it behaves like one, with other DIE's using an AT_user_def_type
4671 attribute to reference it. */
4674 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4676 struct objfile
*objfile
= cu
->objfile
;
4677 struct type
*type
, *range_type
, *index_type
, *char_type
;
4678 struct attribute
*attr
;
4679 unsigned int length
;
4686 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
4689 length
= DW_UNSND (attr
);
4693 /* check for the DW_AT_byte_size attribute */
4694 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4697 length
= DW_UNSND (attr
);
4704 index_type
= dwarf2_fundamental_type (objfile
, FT_INTEGER
, cu
);
4705 range_type
= create_range_type (NULL
, index_type
, 1, length
);
4706 if (cu
->language
== language_fortran
)
4708 /* Need to create a unique string type for bounds
4710 type
= create_string_type (0, range_type
);
4714 char_type
= dwarf2_fundamental_type (objfile
, FT_CHAR
, cu
);
4715 type
= create_string_type (char_type
, range_type
);
4717 set_die_type (die
, type
, cu
);
4720 /* Handle DIES due to C code like:
4724 int (*funcp)(int a, long l);
4728 ('funcp' generates a DW_TAG_subroutine_type DIE)
4732 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4734 struct type
*type
; /* Type that this function returns */
4735 struct type
*ftype
; /* Function that returns above type */
4736 struct attribute
*attr
;
4738 /* Decode the type that this subroutine returns */
4743 type
= die_type (die
, cu
);
4744 ftype
= make_function_type (type
, (struct type
**) 0);
4746 /* All functions in C++, Pascal and Java have prototypes. */
4747 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
4748 if ((attr
&& (DW_UNSND (attr
) != 0))
4749 || cu
->language
== language_cplus
4750 || cu
->language
== language_java
4751 || cu
->language
== language_pascal
)
4752 TYPE_FLAGS (ftype
) |= TYPE_FLAG_PROTOTYPED
;
4754 if (die
->child
!= NULL
)
4756 struct die_info
*child_die
;
4760 /* Count the number of parameters.
4761 FIXME: GDB currently ignores vararg functions, but knows about
4762 vararg member functions. */
4763 child_die
= die
->child
;
4764 while (child_die
&& child_die
->tag
)
4766 if (child_die
->tag
== DW_TAG_formal_parameter
)
4768 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
4769 TYPE_FLAGS (ftype
) |= TYPE_FLAG_VARARGS
;
4770 child_die
= sibling_die (child_die
);
4773 /* Allocate storage for parameters and fill them in. */
4774 TYPE_NFIELDS (ftype
) = nparams
;
4775 TYPE_FIELDS (ftype
) = (struct field
*)
4776 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
4778 child_die
= die
->child
;
4779 while (child_die
&& child_die
->tag
)
4781 if (child_die
->tag
== DW_TAG_formal_parameter
)
4783 /* Dwarf2 has no clean way to discern C++ static and non-static
4784 member functions. G++ helps GDB by marking the first
4785 parameter for non-static member functions (which is the
4786 this pointer) as artificial. We pass this information
4787 to dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. */
4788 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
4790 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
4792 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
4793 TYPE_FIELD_TYPE (ftype
, iparams
) = die_type (child_die
, cu
);
4796 child_die
= sibling_die (child_die
);
4800 set_die_type (die
, ftype
, cu
);
4804 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
4806 struct objfile
*objfile
= cu
->objfile
;
4807 struct attribute
*attr
;
4812 name
= dwarf2_name (die
, cu
);
4813 set_die_type (die
, init_type (TYPE_CODE_TYPEDEF
, 0,
4814 TYPE_FLAG_TARGET_STUB
, name
, objfile
),
4816 TYPE_TARGET_TYPE (die
->type
) = die_type (die
, cu
);
4820 /* Find a representation of a given base type and install
4821 it in the TYPE field of the die. */
4824 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4826 struct objfile
*objfile
= cu
->objfile
;
4828 struct attribute
*attr
;
4829 int encoding
= 0, size
= 0;
4832 /* If we've already decoded this die, this is a no-op. */
4838 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
4841 encoding
= DW_UNSND (attr
);
4843 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4846 size
= DW_UNSND (attr
);
4848 name
= dwarf2_name (die
, cu
);
4851 enum type_code code
= TYPE_CODE_INT
;
4856 case DW_ATE_address
:
4857 /* Turn DW_ATE_address into a void * pointer. */
4858 code
= TYPE_CODE_PTR
;
4859 type_flags
|= TYPE_FLAG_UNSIGNED
;
4861 case DW_ATE_boolean
:
4862 code
= TYPE_CODE_BOOL
;
4863 type_flags
|= TYPE_FLAG_UNSIGNED
;
4865 case DW_ATE_complex_float
:
4866 code
= TYPE_CODE_COMPLEX
;
4868 case DW_ATE_decimal_float
:
4869 code
= TYPE_CODE_DECFLOAT
;
4872 code
= TYPE_CODE_FLT
;
4876 case DW_ATE_unsigned
:
4877 type_flags
|= TYPE_FLAG_UNSIGNED
;
4879 case DW_ATE_signed_char
:
4880 if (cu
->language
== language_m2
)
4881 code
= TYPE_CODE_CHAR
;
4883 case DW_ATE_unsigned_char
:
4884 if (cu
->language
== language_m2
)
4885 code
= TYPE_CODE_CHAR
;
4886 type_flags
|= TYPE_FLAG_UNSIGNED
;
4889 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
4890 dwarf_type_encoding_name (encoding
));
4893 type
= init_type (code
, size
, type_flags
, name
, objfile
);
4894 if (encoding
== DW_ATE_address
)
4895 TYPE_TARGET_TYPE (type
) = dwarf2_fundamental_type (objfile
, FT_VOID
,
4897 else if (encoding
== DW_ATE_complex_float
)
4900 TYPE_TARGET_TYPE (type
)
4901 = dwarf2_fundamental_type (objfile
, FT_EXT_PREC_FLOAT
, cu
);
4902 else if (size
== 16)
4903 TYPE_TARGET_TYPE (type
)
4904 = dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
, cu
);
4906 TYPE_TARGET_TYPE (type
)
4907 = dwarf2_fundamental_type (objfile
, FT_FLOAT
, cu
);
4912 type
= dwarf_base_type (encoding
, size
, cu
);
4914 set_die_type (die
, type
, cu
);
4917 /* Read the given DW_AT_subrange DIE. */
4920 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4922 struct type
*base_type
;
4923 struct type
*range_type
;
4924 struct attribute
*attr
;
4929 /* If we have already decoded this die, then nothing more to do. */
4933 base_type
= die_type (die
, cu
);
4934 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
4936 complaint (&symfile_complaints
,
4937 _("DW_AT_type missing from DW_TAG_subrange_type"));
4939 = dwarf_base_type (DW_ATE_signed
,
4940 gdbarch_addr_bit (current_gdbarch
) / 8, cu
);
4943 if (cu
->language
== language_fortran
)
4945 /* FORTRAN implies a lower bound of 1, if not given. */
4949 /* FIXME: For variable sized arrays either of these could be
4950 a variable rather than a constant value. We'll allow it,
4951 but we don't know how to handle it. */
4952 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
4954 low
= dwarf2_get_attr_constant_value (attr
, 0);
4956 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
4959 if (attr
->form
== DW_FORM_block1
)
4961 /* GCC encodes arrays with unspecified or dynamic length
4962 with a DW_FORM_block1 attribute.
4963 FIXME: GDB does not yet know how to handle dynamic
4964 arrays properly, treat them as arrays with unspecified
4967 FIXME: jimb/2003-09-22: GDB does not really know
4968 how to handle arrays of unspecified length
4969 either; we just represent them as zero-length
4970 arrays. Choose an appropriate upper bound given
4971 the lower bound we've computed above. */
4975 high
= dwarf2_get_attr_constant_value (attr
, 1);
4978 range_type
= create_range_type (NULL
, base_type
, low
, high
);
4980 name
= dwarf2_name (die
, cu
);
4982 TYPE_NAME (range_type
) = name
;
4984 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
4986 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
4988 set_die_type (die
, range_type
, cu
);
4992 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
4999 /* For now, we only support the C meaning of an unspecified type: void. */
5001 type
= init_type (TYPE_CODE_VOID
, 0, 0, dwarf2_name (die
, cu
),
5004 set_die_type (die
, type
, cu
);
5007 /* Read a whole compilation unit into a linked list of dies. */
5009 static struct die_info
*
5010 read_comp_unit (gdb_byte
*info_ptr
, bfd
*abfd
, struct dwarf2_cu
*cu
)
5012 return read_die_and_children (info_ptr
, abfd
, cu
, &info_ptr
, NULL
);
5015 /* Read a single die and all its descendents. Set the die's sibling
5016 field to NULL; set other fields in the die correctly, and set all
5017 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
5018 location of the info_ptr after reading all of those dies. PARENT
5019 is the parent of the die in question. */
5021 static struct die_info
*
5022 read_die_and_children (gdb_byte
*info_ptr
, bfd
*abfd
,
5023 struct dwarf2_cu
*cu
,
5024 gdb_byte
**new_info_ptr
,
5025 struct die_info
*parent
)
5027 struct die_info
*die
;
5031 cur_ptr
= read_full_die (&die
, abfd
, info_ptr
, cu
, &has_children
);
5032 store_in_ref_table (die
->offset
, die
, cu
);
5036 die
->child
= read_die_and_siblings (cur_ptr
, abfd
, cu
,
5042 *new_info_ptr
= cur_ptr
;
5045 die
->sibling
= NULL
;
5046 die
->parent
= parent
;
5050 /* Read a die, all of its descendents, and all of its siblings; set
5051 all of the fields of all of the dies correctly. Arguments are as
5052 in read_die_and_children. */
5054 static struct die_info
*
5055 read_die_and_siblings (gdb_byte
*info_ptr
, bfd
*abfd
,
5056 struct dwarf2_cu
*cu
,
5057 gdb_byte
**new_info_ptr
,
5058 struct die_info
*parent
)
5060 struct die_info
*first_die
, *last_sibling
;
5064 first_die
= last_sibling
= NULL
;
5068 struct die_info
*die
5069 = read_die_and_children (cur_ptr
, abfd
, cu
, &cur_ptr
, parent
);
5077 last_sibling
->sibling
= die
;
5082 *new_info_ptr
= cur_ptr
;
5092 /* Free a linked list of dies. */
5095 free_die_list (struct die_info
*dies
)
5097 struct die_info
*die
, *next
;
5102 if (die
->child
!= NULL
)
5103 free_die_list (die
->child
);
5104 next
= die
->sibling
;
5111 /* Read the contents of the section at OFFSET and of size SIZE from the
5112 object file specified by OBJFILE into the objfile_obstack and return it. */
5115 dwarf2_read_section (struct objfile
*objfile
, asection
*sectp
)
5117 bfd
*abfd
= objfile
->obfd
;
5118 gdb_byte
*buf
, *retbuf
;
5119 bfd_size_type size
= bfd_get_section_size (sectp
);
5124 buf
= obstack_alloc (&objfile
->objfile_obstack
, size
);
5125 retbuf
= symfile_relocate_debug_section (abfd
, sectp
, buf
);
5129 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
5130 || bfd_bread (buf
, size
, abfd
) != size
)
5131 error (_("Dwarf Error: Can't read DWARF data from '%s'"),
5132 bfd_get_filename (abfd
));
5137 /* In DWARF version 2, the description of the debugging information is
5138 stored in a separate .debug_abbrev section. Before we read any
5139 dies from a section we read in all abbreviations and install them
5140 in a hash table. This function also sets flags in CU describing
5141 the data found in the abbrev table. */
5144 dwarf2_read_abbrevs (bfd
*abfd
, struct dwarf2_cu
*cu
)
5146 struct comp_unit_head
*cu_header
= &cu
->header
;
5147 gdb_byte
*abbrev_ptr
;
5148 struct abbrev_info
*cur_abbrev
;
5149 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
5150 unsigned int abbrev_form
, hash_number
;
5151 struct attr_abbrev
*cur_attrs
;
5152 unsigned int allocated_attrs
;
5154 /* Initialize dwarf2 abbrevs */
5155 obstack_init (&cu
->abbrev_obstack
);
5156 cu
->dwarf2_abbrevs
= obstack_alloc (&cu
->abbrev_obstack
,
5158 * sizeof (struct abbrev_info
*)));
5159 memset (cu
->dwarf2_abbrevs
, 0,
5160 ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
5162 abbrev_ptr
= dwarf2_per_objfile
->abbrev_buffer
+ cu_header
->abbrev_offset
;
5163 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5164 abbrev_ptr
+= bytes_read
;
5166 allocated_attrs
= ATTR_ALLOC_CHUNK
;
5167 cur_attrs
= xmalloc (allocated_attrs
* sizeof (struct attr_abbrev
));
5169 /* loop until we reach an abbrev number of 0 */
5170 while (abbrev_number
)
5172 cur_abbrev
= dwarf_alloc_abbrev (cu
);
5174 /* read in abbrev header */
5175 cur_abbrev
->number
= abbrev_number
;
5176 cur_abbrev
->tag
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5177 abbrev_ptr
+= bytes_read
;
5178 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
5181 if (cur_abbrev
->tag
== DW_TAG_namespace
)
5182 cu
->has_namespace_info
= 1;
5184 /* now read in declarations */
5185 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5186 abbrev_ptr
+= bytes_read
;
5187 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5188 abbrev_ptr
+= bytes_read
;
5191 if (cur_abbrev
->num_attrs
== allocated_attrs
)
5193 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
5195 = xrealloc (cur_attrs
, (allocated_attrs
5196 * sizeof (struct attr_abbrev
)));
5199 /* Record whether this compilation unit might have
5200 inter-compilation-unit references. If we don't know what form
5201 this attribute will have, then it might potentially be a
5202 DW_FORM_ref_addr, so we conservatively expect inter-CU
5205 if (abbrev_form
== DW_FORM_ref_addr
5206 || abbrev_form
== DW_FORM_indirect
)
5207 cu
->has_form_ref_addr
= 1;
5209 cur_attrs
[cur_abbrev
->num_attrs
].name
= abbrev_name
;
5210 cur_attrs
[cur_abbrev
->num_attrs
++].form
= abbrev_form
;
5211 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5212 abbrev_ptr
+= bytes_read
;
5213 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5214 abbrev_ptr
+= bytes_read
;
5217 cur_abbrev
->attrs
= obstack_alloc (&cu
->abbrev_obstack
,
5218 (cur_abbrev
->num_attrs
5219 * sizeof (struct attr_abbrev
)));
5220 memcpy (cur_abbrev
->attrs
, cur_attrs
,
5221 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
5223 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
5224 cur_abbrev
->next
= cu
->dwarf2_abbrevs
[hash_number
];
5225 cu
->dwarf2_abbrevs
[hash_number
] = cur_abbrev
;
5227 /* Get next abbreviation.
5228 Under Irix6 the abbreviations for a compilation unit are not
5229 always properly terminated with an abbrev number of 0.
5230 Exit loop if we encounter an abbreviation which we have
5231 already read (which means we are about to read the abbreviations
5232 for the next compile unit) or if the end of the abbreviation
5233 table is reached. */
5234 if ((unsigned int) (abbrev_ptr
- dwarf2_per_objfile
->abbrev_buffer
)
5235 >= dwarf2_per_objfile
->abbrev_size
)
5237 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
5238 abbrev_ptr
+= bytes_read
;
5239 if (dwarf2_lookup_abbrev (abbrev_number
, cu
) != NULL
)
5246 /* Release the memory used by the abbrev table for a compilation unit. */
5249 dwarf2_free_abbrev_table (void *ptr_to_cu
)
5251 struct dwarf2_cu
*cu
= ptr_to_cu
;
5253 obstack_free (&cu
->abbrev_obstack
, NULL
);
5254 cu
->dwarf2_abbrevs
= NULL
;
5257 /* Lookup an abbrev_info structure in the abbrev hash table. */
5259 static struct abbrev_info
*
5260 dwarf2_lookup_abbrev (unsigned int number
, struct dwarf2_cu
*cu
)
5262 unsigned int hash_number
;
5263 struct abbrev_info
*abbrev
;
5265 hash_number
= number
% ABBREV_HASH_SIZE
;
5266 abbrev
= cu
->dwarf2_abbrevs
[hash_number
];
5270 if (abbrev
->number
== number
)
5273 abbrev
= abbrev
->next
;
5278 /* Returns nonzero if TAG represents a type that we might generate a partial
5282 is_type_tag_for_partial (int tag
)
5287 /* Some types that would be reasonable to generate partial symbols for,
5288 that we don't at present. */
5289 case DW_TAG_array_type
:
5290 case DW_TAG_file_type
:
5291 case DW_TAG_ptr_to_member_type
:
5292 case DW_TAG_set_type
:
5293 case DW_TAG_string_type
:
5294 case DW_TAG_subroutine_type
:
5296 case DW_TAG_base_type
:
5297 case DW_TAG_class_type
:
5298 case DW_TAG_enumeration_type
:
5299 case DW_TAG_structure_type
:
5300 case DW_TAG_subrange_type
:
5301 case DW_TAG_typedef
:
5302 case DW_TAG_union_type
:
5309 /* Load all DIEs that are interesting for partial symbols into memory. */
5311 static struct partial_die_info
*
5312 load_partial_dies (bfd
*abfd
, gdb_byte
*info_ptr
, int building_psymtab
,
5313 struct dwarf2_cu
*cu
)
5315 struct partial_die_info
*part_die
;
5316 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
5317 struct abbrev_info
*abbrev
;
5318 unsigned int bytes_read
;
5319 unsigned int load_all
= 0;
5321 int nesting_level
= 1;
5326 if (cu
->per_cu
&& cu
->per_cu
->load_all_dies
)
5330 = htab_create_alloc_ex (cu
->header
.length
/ 12,
5334 &cu
->comp_unit_obstack
,
5335 hashtab_obstack_allocate
,
5336 dummy_obstack_deallocate
);
5338 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5339 sizeof (struct partial_die_info
));
5343 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, cu
);
5345 /* A NULL abbrev means the end of a series of children. */
5348 if (--nesting_level
== 0)
5350 /* PART_DIE was probably the last thing allocated on the
5351 comp_unit_obstack, so we could call obstack_free
5352 here. We don't do that because the waste is small,
5353 and will be cleaned up when we're done with this
5354 compilation unit. This way, we're also more robust
5355 against other users of the comp_unit_obstack. */
5358 info_ptr
+= bytes_read
;
5359 last_die
= parent_die
;
5360 parent_die
= parent_die
->die_parent
;
5364 /* Check whether this DIE is interesting enough to save. Normally
5365 we would not be interested in members here, but there may be
5366 later variables referencing them via DW_AT_specification (for
5369 && !is_type_tag_for_partial (abbrev
->tag
)
5370 && abbrev
->tag
!= DW_TAG_enumerator
5371 && abbrev
->tag
!= DW_TAG_subprogram
5372 && abbrev
->tag
!= DW_TAG_variable
5373 && abbrev
->tag
!= DW_TAG_namespace
5374 && abbrev
->tag
!= DW_TAG_member
)
5376 /* Otherwise we skip to the next sibling, if any. */
5377 info_ptr
= skip_one_die (info_ptr
+ bytes_read
, abbrev
, cu
);
5381 info_ptr
= read_partial_die (part_die
, abbrev
, bytes_read
,
5382 abfd
, info_ptr
, cu
);
5384 /* This two-pass algorithm for processing partial symbols has a
5385 high cost in cache pressure. Thus, handle some simple cases
5386 here which cover the majority of C partial symbols. DIEs
5387 which neither have specification tags in them, nor could have
5388 specification tags elsewhere pointing at them, can simply be
5389 processed and discarded.
5391 This segment is also optional; scan_partial_symbols and
5392 add_partial_symbol will handle these DIEs if we chain
5393 them in normally. When compilers which do not emit large
5394 quantities of duplicate debug information are more common,
5395 this code can probably be removed. */
5397 /* Any complete simple types at the top level (pretty much all
5398 of them, for a language without namespaces), can be processed
5400 if (parent_die
== NULL
5401 && part_die
->has_specification
== 0
5402 && part_die
->is_declaration
== 0
5403 && (part_die
->tag
== DW_TAG_typedef
5404 || part_die
->tag
== DW_TAG_base_type
5405 || part_die
->tag
== DW_TAG_subrange_type
))
5407 if (building_psymtab
&& part_die
->name
!= NULL
)
5408 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5409 VAR_DOMAIN
, LOC_TYPEDEF
,
5410 &cu
->objfile
->static_psymbols
,
5411 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5412 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5416 /* If we're at the second level, and we're an enumerator, and
5417 our parent has no specification (meaning possibly lives in a
5418 namespace elsewhere), then we can add the partial symbol now
5419 instead of queueing it. */
5420 if (part_die
->tag
== DW_TAG_enumerator
5421 && parent_die
!= NULL
5422 && parent_die
->die_parent
== NULL
5423 && parent_die
->tag
== DW_TAG_enumeration_type
5424 && parent_die
->has_specification
== 0)
5426 if (part_die
->name
== NULL
)
5427 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
5428 else if (building_psymtab
)
5429 add_psymbol_to_list (part_die
->name
, strlen (part_die
->name
),
5430 VAR_DOMAIN
, LOC_CONST
,
5431 (cu
->language
== language_cplus
5432 || cu
->language
== language_java
)
5433 ? &cu
->objfile
->global_psymbols
5434 : &cu
->objfile
->static_psymbols
,
5435 0, (CORE_ADDR
) 0, cu
->language
, cu
->objfile
);
5437 info_ptr
= locate_pdi_sibling (part_die
, info_ptr
, abfd
, cu
);
5441 /* We'll save this DIE so link it in. */
5442 part_die
->die_parent
= parent_die
;
5443 part_die
->die_sibling
= NULL
;
5444 part_die
->die_child
= NULL
;
5446 if (last_die
&& last_die
== parent_die
)
5447 last_die
->die_child
= part_die
;
5449 last_die
->die_sibling
= part_die
;
5451 last_die
= part_die
;
5453 if (first_die
== NULL
)
5454 first_die
= part_die
;
5456 /* Maybe add the DIE to the hash table. Not all DIEs that we
5457 find interesting need to be in the hash table, because we
5458 also have the parent/sibling/child chains; only those that we
5459 might refer to by offset later during partial symbol reading.
5461 For now this means things that might have be the target of a
5462 DW_AT_specification, DW_AT_abstract_origin, or
5463 DW_AT_extension. DW_AT_extension will refer only to
5464 namespaces; DW_AT_abstract_origin refers to functions (and
5465 many things under the function DIE, but we do not recurse
5466 into function DIEs during partial symbol reading) and
5467 possibly variables as well; DW_AT_specification refers to
5468 declarations. Declarations ought to have the DW_AT_declaration
5469 flag. It happens that GCC forgets to put it in sometimes, but
5470 only for functions, not for types.
5472 Adding more things than necessary to the hash table is harmless
5473 except for the performance cost. Adding too few will result in
5474 wasted time in find_partial_die, when we reread the compilation
5475 unit with load_all_dies set. */
5478 || abbrev
->tag
== DW_TAG_subprogram
5479 || abbrev
->tag
== DW_TAG_variable
5480 || abbrev
->tag
== DW_TAG_namespace
5481 || part_die
->is_declaration
)
5485 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
5486 part_die
->offset
, INSERT
);
5490 part_die
= obstack_alloc (&cu
->comp_unit_obstack
,
5491 sizeof (struct partial_die_info
));
5493 /* For some DIEs we want to follow their children (if any). For C
5494 we have no reason to follow the children of structures; for other
5495 languages we have to, both so that we can get at method physnames
5496 to infer fully qualified class names, and for DW_AT_specification. */
5497 if (last_die
->has_children
5499 || last_die
->tag
== DW_TAG_namespace
5500 || last_die
->tag
== DW_TAG_enumeration_type
5501 || (cu
->language
!= language_c
5502 && (last_die
->tag
== DW_TAG_class_type
5503 || last_die
->tag
== DW_TAG_structure_type
5504 || last_die
->tag
== DW_TAG_union_type
))))
5507 parent_die
= last_die
;
5511 /* Otherwise we skip to the next sibling, if any. */
5512 info_ptr
= locate_pdi_sibling (last_die
, info_ptr
, abfd
, cu
);
5514 /* Back to the top, do it again. */
5518 /* Read a minimal amount of information into the minimal die structure. */
5521 read_partial_die (struct partial_die_info
*part_die
,
5522 struct abbrev_info
*abbrev
,
5523 unsigned int abbrev_len
, bfd
*abfd
,
5524 gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5526 unsigned int bytes_read
, i
;
5527 struct attribute attr
;
5528 int has_low_pc_attr
= 0;
5529 int has_high_pc_attr
= 0;
5531 memset (part_die
, 0, sizeof (struct partial_die_info
));
5533 part_die
->offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5535 info_ptr
+= abbrev_len
;
5540 part_die
->tag
= abbrev
->tag
;
5541 part_die
->has_children
= abbrev
->has_children
;
5543 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5545 info_ptr
= read_attribute (&attr
, &abbrev
->attrs
[i
], abfd
, info_ptr
, cu
);
5547 /* Store the data if it is of an attribute we want to keep in a
5548 partial symbol table. */
5553 /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */
5554 if (part_die
->name
== NULL
)
5555 part_die
->name
= DW_STRING (&attr
);
5557 case DW_AT_comp_dir
:
5558 if (part_die
->dirname
== NULL
)
5559 part_die
->dirname
= DW_STRING (&attr
);
5561 case DW_AT_MIPS_linkage_name
:
5562 part_die
->name
= DW_STRING (&attr
);
5565 has_low_pc_attr
= 1;
5566 part_die
->lowpc
= DW_ADDR (&attr
);
5569 has_high_pc_attr
= 1;
5570 part_die
->highpc
= DW_ADDR (&attr
);
5572 case DW_AT_location
:
5573 /* Support the .debug_loc offsets */
5574 if (attr_form_is_block (&attr
))
5576 part_die
->locdesc
= DW_BLOCK (&attr
);
5578 else if (attr
.form
== DW_FORM_data4
|| attr
.form
== DW_FORM_data8
)
5580 dwarf2_complex_location_expr_complaint ();
5584 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
5585 "partial symbol information");
5588 case DW_AT_language
:
5589 part_die
->language
= DW_UNSND (&attr
);
5591 case DW_AT_external
:
5592 part_die
->is_external
= DW_UNSND (&attr
);
5594 case DW_AT_declaration
:
5595 part_die
->is_declaration
= DW_UNSND (&attr
);
5598 part_die
->has_type
= 1;
5600 case DW_AT_abstract_origin
:
5601 case DW_AT_specification
:
5602 case DW_AT_extension
:
5603 part_die
->has_specification
= 1;
5604 part_die
->spec_offset
= dwarf2_get_ref_die_offset (&attr
, cu
);
5607 /* Ignore absolute siblings, they might point outside of
5608 the current compile unit. */
5609 if (attr
.form
== DW_FORM_ref_addr
)
5610 complaint (&symfile_complaints
, _("ignoring absolute DW_AT_sibling"));
5612 part_die
->sibling
= dwarf2_per_objfile
->info_buffer
5613 + dwarf2_get_ref_die_offset (&attr
, cu
);
5615 case DW_AT_stmt_list
:
5616 part_die
->has_stmt_list
= 1;
5617 part_die
->line_offset
= DW_UNSND (&attr
);
5619 case DW_AT_byte_size
:
5620 part_die
->has_byte_size
= 1;
5627 /* When using the GNU linker, .gnu.linkonce. sections are used to
5628 eliminate duplicate copies of functions and vtables and such.
5629 The linker will arbitrarily choose one and discard the others.
5630 The AT_*_pc values for such functions refer to local labels in
5631 these sections. If the section from that file was discarded, the
5632 labels are not in the output, so the relocs get a value of 0.
5633 If this is a discarded function, mark the pc bounds as invalid,
5634 so that GDB will ignore it. */
5635 if (has_low_pc_attr
&& has_high_pc_attr
5636 && part_die
->lowpc
< part_die
->highpc
5637 && (part_die
->lowpc
!= 0
5638 || dwarf2_per_objfile
->has_section_at_zero
))
5639 part_die
->has_pc_info
= 1;
5643 /* Find a cached partial DIE at OFFSET in CU. */
5645 static struct partial_die_info
*
5646 find_partial_die_in_comp_unit (unsigned long offset
, struct dwarf2_cu
*cu
)
5648 struct partial_die_info
*lookup_die
= NULL
;
5649 struct partial_die_info part_die
;
5651 part_die
.offset
= offset
;
5652 lookup_die
= htab_find_with_hash (cu
->partial_dies
, &part_die
, offset
);
5657 /* Find a partial DIE at OFFSET, which may or may not be in CU. */
5659 static struct partial_die_info
*
5660 find_partial_die (unsigned long offset
, struct dwarf2_cu
*cu
)
5662 struct dwarf2_per_cu_data
*per_cu
= NULL
;
5663 struct partial_die_info
*pd
= NULL
;
5665 if (offset
>= cu
->header
.offset
5666 && offset
< cu
->header
.offset
+ cu
->header
.length
)
5668 pd
= find_partial_die_in_comp_unit (offset
, cu
);
5673 per_cu
= dwarf2_find_containing_comp_unit (offset
, cu
->objfile
);
5675 if (per_cu
->cu
== NULL
)
5677 load_comp_unit (per_cu
, cu
->objfile
);
5678 per_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
5679 dwarf2_per_objfile
->read_in_chain
= per_cu
;
5682 per_cu
->cu
->last_used
= 0;
5683 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5685 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
5687 struct cleanup
*back_to
;
5688 struct partial_die_info comp_unit_die
;
5689 struct abbrev_info
*abbrev
;
5690 unsigned int bytes_read
;
5693 per_cu
->load_all_dies
= 1;
5695 /* Re-read the DIEs. */
5696 back_to
= make_cleanup (null_cleanup
, 0);
5697 if (per_cu
->cu
->dwarf2_abbrevs
== NULL
)
5699 dwarf2_read_abbrevs (per_cu
->cu
->objfile
->obfd
, per_cu
->cu
);
5700 back_to
= make_cleanup (dwarf2_free_abbrev_table
, per_cu
->cu
);
5702 info_ptr
= per_cu
->cu
->header
.first_die_ptr
;
5703 abbrev
= peek_die_abbrev (info_ptr
, &bytes_read
, per_cu
->cu
);
5704 info_ptr
= read_partial_die (&comp_unit_die
, abbrev
, bytes_read
,
5705 per_cu
->cu
->objfile
->obfd
, info_ptr
,
5707 if (comp_unit_die
.has_children
)
5708 load_partial_dies (per_cu
->cu
->objfile
->obfd
, info_ptr
, 0, per_cu
->cu
);
5709 do_cleanups (back_to
);
5711 pd
= find_partial_die_in_comp_unit (offset
, per_cu
->cu
);
5715 internal_error (__FILE__
, __LINE__
,
5716 _("could not find partial DIE 0x%lx in cache [from module %s]\n"),
5717 offset
, bfd_get_filename (cu
->objfile
->obfd
));
5721 /* Adjust PART_DIE before generating a symbol for it. This function
5722 may set the is_external flag or change the DIE's name. */
5725 fixup_partial_die (struct partial_die_info
*part_die
,
5726 struct dwarf2_cu
*cu
)
5728 /* If we found a reference attribute and the DIE has no name, try
5729 to find a name in the referred to DIE. */
5731 if (part_die
->name
== NULL
&& part_die
->has_specification
)
5733 struct partial_die_info
*spec_die
;
5735 spec_die
= find_partial_die (part_die
->spec_offset
, cu
);
5737 fixup_partial_die (spec_die
, cu
);
5741 part_die
->name
= spec_die
->name
;
5743 /* Copy DW_AT_external attribute if it is set. */
5744 if (spec_die
->is_external
)
5745 part_die
->is_external
= spec_die
->is_external
;
5749 /* Set default names for some unnamed DIEs. */
5750 if (part_die
->name
== NULL
&& (part_die
->tag
== DW_TAG_structure_type
5751 || part_die
->tag
== DW_TAG_class_type
))
5752 part_die
->name
= "(anonymous class)";
5754 if (part_die
->name
== NULL
&& part_die
->tag
== DW_TAG_namespace
)
5755 part_die
->name
= "(anonymous namespace)";
5757 if (part_die
->tag
== DW_TAG_structure_type
5758 || part_die
->tag
== DW_TAG_class_type
5759 || part_die
->tag
== DW_TAG_union_type
)
5760 guess_structure_name (part_die
, cu
);
5763 /* Read the die from the .debug_info section buffer. Set DIEP to
5764 point to a newly allocated die with its information, except for its
5765 child, sibling, and parent fields. Set HAS_CHILDREN to tell
5766 whether the die has children or not. */
5769 read_full_die (struct die_info
**diep
, bfd
*abfd
, gdb_byte
*info_ptr
,
5770 struct dwarf2_cu
*cu
, int *has_children
)
5772 unsigned int abbrev_number
, bytes_read
, i
, offset
;
5773 struct abbrev_info
*abbrev
;
5774 struct die_info
*die
;
5776 offset
= info_ptr
- dwarf2_per_objfile
->info_buffer
;
5777 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5778 info_ptr
+= bytes_read
;
5781 die
= dwarf_alloc_die ();
5783 die
->abbrev
= abbrev_number
;
5790 abbrev
= dwarf2_lookup_abbrev (abbrev_number
, cu
);
5793 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
5795 bfd_get_filename (abfd
));
5797 die
= dwarf_alloc_die ();
5798 die
->offset
= offset
;
5799 die
->tag
= abbrev
->tag
;
5800 die
->abbrev
= abbrev_number
;
5803 die
->num_attrs
= abbrev
->num_attrs
;
5804 die
->attrs
= (struct attribute
*)
5805 xmalloc (die
->num_attrs
* sizeof (struct attribute
));
5807 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
5809 info_ptr
= read_attribute (&die
->attrs
[i
], &abbrev
->attrs
[i
],
5810 abfd
, info_ptr
, cu
);
5812 /* If this attribute is an absolute reference to a different
5813 compilation unit, make sure that compilation unit is loaded
5815 if (die
->attrs
[i
].form
== DW_FORM_ref_addr
5816 && (DW_ADDR (&die
->attrs
[i
]) < cu
->header
.offset
5817 || (DW_ADDR (&die
->attrs
[i
])
5818 >= cu
->header
.offset
+ cu
->header
.length
)))
5820 struct dwarf2_per_cu_data
*per_cu
;
5821 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (&die
->attrs
[i
]),
5824 /* Mark the dependence relation so that we don't flush PER_CU
5826 dwarf2_add_dependence (cu
, per_cu
);
5828 /* If it's already on the queue, we have nothing to do. */
5832 /* If the compilation unit is already loaded, just mark it as
5834 if (per_cu
->cu
!= NULL
)
5836 per_cu
->cu
->last_used
= 0;
5840 /* Add it to the queue. */
5841 queue_comp_unit (per_cu
);
5846 *has_children
= abbrev
->has_children
;
5850 /* Read an attribute value described by an attribute form. */
5853 read_attribute_value (struct attribute
*attr
, unsigned form
,
5854 bfd
*abfd
, gdb_byte
*info_ptr
,
5855 struct dwarf2_cu
*cu
)
5857 struct comp_unit_head
*cu_header
= &cu
->header
;
5858 unsigned int bytes_read
;
5859 struct dwarf_block
*blk
;
5865 case DW_FORM_ref_addr
:
5866 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
5867 info_ptr
+= bytes_read
;
5869 case DW_FORM_block2
:
5870 blk
= dwarf_alloc_block (cu
);
5871 blk
->size
= read_2_bytes (abfd
, info_ptr
);
5873 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5874 info_ptr
+= blk
->size
;
5875 DW_BLOCK (attr
) = blk
;
5877 case DW_FORM_block4
:
5878 blk
= dwarf_alloc_block (cu
);
5879 blk
->size
= read_4_bytes (abfd
, info_ptr
);
5881 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5882 info_ptr
+= blk
->size
;
5883 DW_BLOCK (attr
) = blk
;
5886 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
5890 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
5894 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
5897 case DW_FORM_string
:
5898 DW_STRING (attr
) = read_string (abfd
, info_ptr
, &bytes_read
);
5899 info_ptr
+= bytes_read
;
5902 DW_STRING (attr
) = read_indirect_string (abfd
, info_ptr
, cu_header
,
5904 info_ptr
+= bytes_read
;
5907 blk
= dwarf_alloc_block (cu
);
5908 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5909 info_ptr
+= bytes_read
;
5910 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5911 info_ptr
+= blk
->size
;
5912 DW_BLOCK (attr
) = blk
;
5914 case DW_FORM_block1
:
5915 blk
= dwarf_alloc_block (cu
);
5916 blk
->size
= read_1_byte (abfd
, info_ptr
);
5918 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
5919 info_ptr
+= blk
->size
;
5920 DW_BLOCK (attr
) = blk
;
5923 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
5927 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
5931 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
5932 info_ptr
+= bytes_read
;
5935 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5936 info_ptr
+= bytes_read
;
5939 DW_ADDR (attr
) = cu
->header
.offset
+ read_1_byte (abfd
, info_ptr
);
5943 DW_ADDR (attr
) = cu
->header
.offset
+ read_2_bytes (abfd
, info_ptr
);
5947 DW_ADDR (attr
) = cu
->header
.offset
+ read_4_bytes (abfd
, info_ptr
);
5951 DW_ADDR (attr
) = cu
->header
.offset
+ read_8_bytes (abfd
, info_ptr
);
5954 case DW_FORM_ref_udata
:
5955 DW_ADDR (attr
) = (cu
->header
.offset
5956 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
5957 info_ptr
+= bytes_read
;
5959 case DW_FORM_indirect
:
5960 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
5961 info_ptr
+= bytes_read
;
5962 info_ptr
= read_attribute_value (attr
, form
, abfd
, info_ptr
, cu
);
5965 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
5966 dwarf_form_name (form
),
5967 bfd_get_filename (abfd
));
5972 /* Read an attribute described by an abbreviated attribute. */
5975 read_attribute (struct attribute
*attr
, struct attr_abbrev
*abbrev
,
5976 bfd
*abfd
, gdb_byte
*info_ptr
, struct dwarf2_cu
*cu
)
5978 attr
->name
= abbrev
->name
;
5979 return read_attribute_value (attr
, abbrev
->form
, abfd
, info_ptr
, cu
);
5982 /* read dwarf information from a buffer */
5985 read_1_byte (bfd
*abfd
, gdb_byte
*buf
)
5987 return bfd_get_8 (abfd
, buf
);
5991 read_1_signed_byte (bfd
*abfd
, gdb_byte
*buf
)
5993 return bfd_get_signed_8 (abfd
, buf
);
5997 read_2_bytes (bfd
*abfd
, gdb_byte
*buf
)
5999 return bfd_get_16 (abfd
, buf
);
6003 read_2_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6005 return bfd_get_signed_16 (abfd
, buf
);
6009 read_4_bytes (bfd
*abfd
, gdb_byte
*buf
)
6011 return bfd_get_32 (abfd
, buf
);
6015 read_4_signed_bytes (bfd
*abfd
, gdb_byte
*buf
)
6017 return bfd_get_signed_32 (abfd
, buf
);
6020 static unsigned long
6021 read_8_bytes (bfd
*abfd
, gdb_byte
*buf
)
6023 return bfd_get_64 (abfd
, buf
);
6027 read_address (bfd
*abfd
, gdb_byte
*buf
, struct dwarf2_cu
*cu
,
6028 unsigned int *bytes_read
)
6030 struct comp_unit_head
*cu_header
= &cu
->header
;
6031 CORE_ADDR retval
= 0;
6033 if (cu_header
->signed_addr_p
)
6035 switch (cu_header
->addr_size
)
6038 retval
= bfd_get_signed_16 (abfd
, buf
);
6041 retval
= bfd_get_signed_32 (abfd
, buf
);
6044 retval
= bfd_get_signed_64 (abfd
, buf
);
6047 internal_error (__FILE__
, __LINE__
,
6048 _("read_address: bad switch, signed [in module %s]"),
6049 bfd_get_filename (abfd
));
6054 switch (cu_header
->addr_size
)
6057 retval
= bfd_get_16 (abfd
, buf
);
6060 retval
= bfd_get_32 (abfd
, buf
);
6063 retval
= bfd_get_64 (abfd
, buf
);
6066 internal_error (__FILE__
, __LINE__
,
6067 _("read_address: bad switch, unsigned [in module %s]"),
6068 bfd_get_filename (abfd
));
6072 *bytes_read
= cu_header
->addr_size
;
6076 /* Read the initial length from a section. The (draft) DWARF 3
6077 specification allows the initial length to take up either 4 bytes
6078 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
6079 bytes describe the length and all offsets will be 8 bytes in length
6082 An older, non-standard 64-bit format is also handled by this
6083 function. The older format in question stores the initial length
6084 as an 8-byte quantity without an escape value. Lengths greater
6085 than 2^32 aren't very common which means that the initial 4 bytes
6086 is almost always zero. Since a length value of zero doesn't make
6087 sense for the 32-bit format, this initial zero can be considered to
6088 be an escape value which indicates the presence of the older 64-bit
6089 format. As written, the code can't detect (old format) lengths
6090 greater than 4GB. If it becomes necessary to handle lengths
6091 somewhat larger than 4GB, we could allow other small values (such
6092 as the non-sensical values of 1, 2, and 3) to also be used as
6093 escape values indicating the presence of the old format.
6095 The value returned via bytes_read should be used to increment the
6096 relevant pointer after calling read_initial_length().
6098 As a side effect, this function sets the fields initial_length_size
6099 and offset_size in cu_header to the values appropriate for the
6100 length field. (The format of the initial length field determines
6101 the width of file offsets to be fetched later with read_offset().)
6103 [ Note: read_initial_length() and read_offset() are based on the
6104 document entitled "DWARF Debugging Information Format", revision
6105 3, draft 8, dated November 19, 2001. This document was obtained
6108 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
6110 This document is only a draft and is subject to change. (So beware.)
6112 Details regarding the older, non-standard 64-bit format were
6113 determined empirically by examining 64-bit ELF files produced by
6114 the SGI toolchain on an IRIX 6.5 machine.
6116 - Kevin, July 16, 2002
6120 read_initial_length (bfd
*abfd
, gdb_byte
*buf
, struct comp_unit_head
*cu_header
,
6121 unsigned int *bytes_read
)
6123 LONGEST length
= bfd_get_32 (abfd
, buf
);
6125 if (length
== 0xffffffff)
6127 length
= bfd_get_64 (abfd
, buf
+ 4);
6130 else if (length
== 0)
6132 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
6133 length
= bfd_get_64 (abfd
, buf
);
6143 gdb_assert (cu_header
->initial_length_size
== 0
6144 || cu_header
->initial_length_size
== 4
6145 || cu_header
->initial_length_size
== 8
6146 || cu_header
->initial_length_size
== 12);
6148 if (cu_header
->initial_length_size
!= 0
6149 && cu_header
->initial_length_size
!= *bytes_read
)
6150 complaint (&symfile_complaints
,
6151 _("intermixed 32-bit and 64-bit DWARF sections"));
6153 cu_header
->initial_length_size
= *bytes_read
;
6154 cu_header
->offset_size
= (*bytes_read
== 4) ? 4 : 8;
6160 /* Read an offset from the data stream. The size of the offset is
6161 given by cu_header->offset_size. */
6164 read_offset (bfd
*abfd
, gdb_byte
*buf
, const struct comp_unit_head
*cu_header
,
6165 unsigned int *bytes_read
)
6169 switch (cu_header
->offset_size
)
6172 retval
= bfd_get_32 (abfd
, buf
);
6176 retval
= bfd_get_64 (abfd
, buf
);
6180 internal_error (__FILE__
, __LINE__
,
6181 _("read_offset: bad switch [in module %s]"),
6182 bfd_get_filename (abfd
));
6189 read_n_bytes (bfd
*abfd
, gdb_byte
*buf
, unsigned int size
)
6191 /* If the size of a host char is 8 bits, we can return a pointer
6192 to the buffer, otherwise we have to copy the data to a buffer
6193 allocated on the temporary obstack. */
6194 gdb_assert (HOST_CHAR_BIT
== 8);
6199 read_string (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6201 /* If the size of a host char is 8 bits, we can return a pointer
6202 to the string, otherwise we have to copy the string to a buffer
6203 allocated on the temporary obstack. */
6204 gdb_assert (HOST_CHAR_BIT
== 8);
6207 *bytes_read_ptr
= 1;
6210 *bytes_read_ptr
= strlen ((char *) buf
) + 1;
6211 return (char *) buf
;
6215 read_indirect_string (bfd
*abfd
, gdb_byte
*buf
,
6216 const struct comp_unit_head
*cu_header
,
6217 unsigned int *bytes_read_ptr
)
6219 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
,
6222 if (dwarf2_per_objfile
->str_buffer
== NULL
)
6224 error (_("DW_FORM_strp used without .debug_str section [in module %s]"),
6225 bfd_get_filename (abfd
));
6228 if (str_offset
>= dwarf2_per_objfile
->str_size
)
6230 error (_("DW_FORM_strp pointing outside of .debug_str section [in module %s]"),
6231 bfd_get_filename (abfd
));
6234 gdb_assert (HOST_CHAR_BIT
== 8);
6235 if (dwarf2_per_objfile
->str_buffer
[str_offset
] == '\0')
6237 return (char *) (dwarf2_per_objfile
->str_buffer
+ str_offset
);
6240 static unsigned long
6241 read_unsigned_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6243 unsigned long result
;
6244 unsigned int num_read
;
6254 byte
= bfd_get_8 (abfd
, buf
);
6257 result
|= ((unsigned long)(byte
& 127) << shift
);
6258 if ((byte
& 128) == 0)
6264 *bytes_read_ptr
= num_read
;
6269 read_signed_leb128 (bfd
*abfd
, gdb_byte
*buf
, unsigned int *bytes_read_ptr
)
6272 int i
, shift
, num_read
;
6281 byte
= bfd_get_8 (abfd
, buf
);
6284 result
|= ((long)(byte
& 127) << shift
);
6286 if ((byte
& 128) == 0)
6291 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
6292 result
|= -(((long)1) << shift
);
6293 *bytes_read_ptr
= num_read
;
6297 /* Return a pointer to just past the end of an LEB128 number in BUF. */
6300 skip_leb128 (bfd
*abfd
, gdb_byte
*buf
)
6306 byte
= bfd_get_8 (abfd
, buf
);
6308 if ((byte
& 128) == 0)
6314 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
6320 cu
->language
= language_c
;
6322 case DW_LANG_C_plus_plus
:
6323 cu
->language
= language_cplus
;
6325 case DW_LANG_Fortran77
:
6326 case DW_LANG_Fortran90
:
6327 case DW_LANG_Fortran95
:
6328 cu
->language
= language_fortran
;
6330 case DW_LANG_Mips_Assembler
:
6331 cu
->language
= language_asm
;
6334 cu
->language
= language_java
;
6338 cu
->language
= language_ada
;
6340 case DW_LANG_Modula2
:
6341 cu
->language
= language_m2
;
6343 case DW_LANG_Pascal83
:
6344 cu
->language
= language_pascal
;
6346 case DW_LANG_Cobol74
:
6347 case DW_LANG_Cobol85
:
6349 cu
->language
= language_minimal
;
6352 cu
->language_defn
= language_def (cu
->language
);
6355 /* Return the named attribute or NULL if not there. */
6357 static struct attribute
*
6358 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
6361 struct attribute
*spec
= NULL
;
6363 for (i
= 0; i
< die
->num_attrs
; ++i
)
6365 if (die
->attrs
[i
].name
== name
)
6366 return &die
->attrs
[i
];
6367 if (die
->attrs
[i
].name
== DW_AT_specification
6368 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
6369 spec
= &die
->attrs
[i
];
6373 return dwarf2_attr (follow_die_ref (die
, spec
, cu
), name
, cu
);
6378 /* Return non-zero iff the attribute NAME is defined for the given DIE,
6379 and holds a non-zero value. This function should only be used for
6380 DW_FORM_flag attributes. */
6383 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
6385 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
6387 return (attr
&& DW_UNSND (attr
));
6391 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
6393 /* A DIE is a declaration if it has a DW_AT_declaration attribute
6394 which value is non-zero. However, we have to be careful with
6395 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
6396 (via dwarf2_flag_true_p) follows this attribute. So we may
6397 end up accidently finding a declaration attribute that belongs
6398 to a different DIE referenced by the specification attribute,
6399 even though the given DIE does not have a declaration attribute. */
6400 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
6401 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
6404 /* Return the die giving the specification for DIE, if there is
6407 static struct die_info
*
6408 die_specification (struct die_info
*die
, struct dwarf2_cu
*cu
)
6410 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
, cu
);
6412 if (spec_attr
== NULL
)
6415 return follow_die_ref (die
, spec_attr
, cu
);
6418 /* Free the line_header structure *LH, and any arrays and strings it
6421 free_line_header (struct line_header
*lh
)
6423 if (lh
->standard_opcode_lengths
)
6424 xfree (lh
->standard_opcode_lengths
);
6426 /* Remember that all the lh->file_names[i].name pointers are
6427 pointers into debug_line_buffer, and don't need to be freed. */
6429 xfree (lh
->file_names
);
6431 /* Similarly for the include directory names. */
6432 if (lh
->include_dirs
)
6433 xfree (lh
->include_dirs
);
6439 /* Add an entry to LH's include directory table. */
6441 add_include_dir (struct line_header
*lh
, char *include_dir
)
6443 /* Grow the array if necessary. */
6444 if (lh
->include_dirs_size
== 0)
6446 lh
->include_dirs_size
= 1; /* for testing */
6447 lh
->include_dirs
= xmalloc (lh
->include_dirs_size
6448 * sizeof (*lh
->include_dirs
));
6450 else if (lh
->num_include_dirs
>= lh
->include_dirs_size
)
6452 lh
->include_dirs_size
*= 2;
6453 lh
->include_dirs
= xrealloc (lh
->include_dirs
,
6454 (lh
->include_dirs_size
6455 * sizeof (*lh
->include_dirs
)));
6458 lh
->include_dirs
[lh
->num_include_dirs
++] = include_dir
;
6462 /* Add an entry to LH's file name table. */
6464 add_file_name (struct line_header
*lh
,
6466 unsigned int dir_index
,
6467 unsigned int mod_time
,
6468 unsigned int length
)
6470 struct file_entry
*fe
;
6472 /* Grow the array if necessary. */
6473 if (lh
->file_names_size
== 0)
6475 lh
->file_names_size
= 1; /* for testing */
6476 lh
->file_names
= xmalloc (lh
->file_names_size
6477 * sizeof (*lh
->file_names
));
6479 else if (lh
->num_file_names
>= lh
->file_names_size
)
6481 lh
->file_names_size
*= 2;
6482 lh
->file_names
= xrealloc (lh
->file_names
,
6483 (lh
->file_names_size
6484 * sizeof (*lh
->file_names
)));
6487 fe
= &lh
->file_names
[lh
->num_file_names
++];
6489 fe
->dir_index
= dir_index
;
6490 fe
->mod_time
= mod_time
;
6491 fe
->length
= length
;
6497 /* Read the statement program header starting at OFFSET in
6498 .debug_line, according to the endianness of ABFD. Return a pointer
6499 to a struct line_header, allocated using xmalloc.
6501 NOTE: the strings in the include directory and file name tables of
6502 the returned object point into debug_line_buffer, and must not be
6504 static struct line_header
*
6505 dwarf_decode_line_header (unsigned int offset
, bfd
*abfd
,
6506 struct dwarf2_cu
*cu
)
6508 struct cleanup
*back_to
;
6509 struct line_header
*lh
;
6511 unsigned int bytes_read
;
6513 char *cur_dir
, *cur_file
;
6515 if (dwarf2_per_objfile
->line_buffer
== NULL
)
6517 complaint (&symfile_complaints
, _("missing .debug_line section"));
6521 /* Make sure that at least there's room for the total_length field.
6522 That could be 12 bytes long, but we're just going to fudge that. */
6523 if (offset
+ 4 >= dwarf2_per_objfile
->line_size
)
6525 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6529 lh
= xmalloc (sizeof (*lh
));
6530 memset (lh
, 0, sizeof (*lh
));
6531 back_to
= make_cleanup ((make_cleanup_ftype
*) free_line_header
,
6534 line_ptr
= dwarf2_per_objfile
->line_buffer
+ offset
;
6536 /* Read in the header. */
6538 read_initial_length (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6539 line_ptr
+= bytes_read
;
6540 if (line_ptr
+ lh
->total_length
> (dwarf2_per_objfile
->line_buffer
6541 + dwarf2_per_objfile
->line_size
))
6543 dwarf2_statement_list_fits_in_line_number_section_complaint ();
6546 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
6547 lh
->version
= read_2_bytes (abfd
, line_ptr
);
6549 lh
->header_length
= read_offset (abfd
, line_ptr
, &cu
->header
, &bytes_read
);
6550 line_ptr
+= bytes_read
;
6551 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
6553 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
6555 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
6557 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
6559 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
6561 lh
->standard_opcode_lengths
6562 = xmalloc (lh
->opcode_base
* sizeof (lh
->standard_opcode_lengths
[0]));
6564 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
6565 for (i
= 1; i
< lh
->opcode_base
; ++i
)
6567 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
6571 /* Read directory table. */
6572 while ((cur_dir
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6574 line_ptr
+= bytes_read
;
6575 add_include_dir (lh
, cur_dir
);
6577 line_ptr
+= bytes_read
;
6579 /* Read file name table. */
6580 while ((cur_file
= read_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
6582 unsigned int dir_index
, mod_time
, length
;
6584 line_ptr
+= bytes_read
;
6585 dir_index
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6586 line_ptr
+= bytes_read
;
6587 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6588 line_ptr
+= bytes_read
;
6589 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6590 line_ptr
+= bytes_read
;
6592 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6594 line_ptr
+= bytes_read
;
6595 lh
->statement_program_start
= line_ptr
;
6597 if (line_ptr
> (dwarf2_per_objfile
->line_buffer
6598 + dwarf2_per_objfile
->line_size
))
6599 complaint (&symfile_complaints
,
6600 _("line number info header doesn't fit in `.debug_line' section"));
6602 discard_cleanups (back_to
);
6606 /* This function exists to work around a bug in certain compilers
6607 (particularly GCC 2.95), in which the first line number marker of a
6608 function does not show up until after the prologue, right before
6609 the second line number marker. This function shifts ADDRESS down
6610 to the beginning of the function if necessary, and is called on
6611 addresses passed to record_line. */
6614 check_cu_functions (CORE_ADDR address
, struct dwarf2_cu
*cu
)
6616 struct function_range
*fn
;
6618 /* Find the function_range containing address. */
6623 cu
->cached_fn
= cu
->first_fn
;
6627 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6633 while (fn
&& fn
!= cu
->cached_fn
)
6634 if (fn
->lowpc
<= address
&& fn
->highpc
> address
)
6644 if (address
!= fn
->lowpc
)
6645 complaint (&symfile_complaints
,
6646 _("misplaced first line number at 0x%lx for '%s'"),
6647 (unsigned long) address
, fn
->name
);
6652 /* Decode the Line Number Program (LNP) for the given line_header
6653 structure and CU. The actual information extracted and the type
6654 of structures created from the LNP depends on the value of PST.
6656 1. If PST is NULL, then this procedure uses the data from the program
6657 to create all necessary symbol tables, and their linetables.
6658 The compilation directory of the file is passed in COMP_DIR,
6659 and must not be NULL.
6661 2. If PST is not NULL, this procedure reads the program to determine
6662 the list of files included by the unit represented by PST, and
6663 builds all the associated partial symbol tables. In this case,
6664 the value of COMP_DIR is ignored, and can thus be NULL (the COMP_DIR
6665 is not used to compute the full name of the symtab, and therefore
6666 omitting it when building the partial symtab does not introduce
6667 the potential for inconsistency - a partial symtab and its associated
6668 symbtab having a different fullname -). */
6671 dwarf_decode_lines (struct line_header
*lh
, char *comp_dir
, bfd
*abfd
,
6672 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
)
6674 gdb_byte
*line_ptr
, *extended_end
;
6676 unsigned int bytes_read
, extended_len
;
6677 unsigned char op_code
, extended_op
, adj_opcode
;
6679 struct objfile
*objfile
= cu
->objfile
;
6680 const int decode_for_pst_p
= (pst
!= NULL
);
6681 struct subfile
*last_subfile
= NULL
, *first_subfile
= current_subfile
;
6683 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
6685 line_ptr
= lh
->statement_program_start
;
6686 line_end
= lh
->statement_program_end
;
6688 /* Read the statement sequences until there's nothing left. */
6689 while (line_ptr
< line_end
)
6691 /* state machine registers */
6692 CORE_ADDR address
= 0;
6693 unsigned int file
= 1;
6694 unsigned int line
= 1;
6695 unsigned int column
= 0;
6696 int is_stmt
= lh
->default_is_stmt
;
6697 int basic_block
= 0;
6698 int end_sequence
= 0;
6700 if (!decode_for_pst_p
&& lh
->num_file_names
>= file
)
6702 /* Start a subfile for the current file of the state machine. */
6703 /* lh->include_dirs and lh->file_names are 0-based, but the
6704 directory and file name numbers in the statement program
6706 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
6710 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6712 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6715 /* Decode the table. */
6716 while (!end_sequence
)
6718 op_code
= read_1_byte (abfd
, line_ptr
);
6721 if (op_code
>= lh
->opcode_base
)
6723 /* Special operand. */
6724 adj_opcode
= op_code
- lh
->opcode_base
;
6725 address
+= (adj_opcode
/ lh
->line_range
)
6726 * lh
->minimum_instruction_length
;
6727 line
+= lh
->line_base
+ (adj_opcode
% lh
->line_range
);
6728 if (lh
->num_file_names
< file
)
6729 dwarf2_debug_line_missing_file_complaint ();
6732 lh
->file_names
[file
- 1].included_p
= 1;
6733 if (!decode_for_pst_p
)
6735 if (last_subfile
!= current_subfile
)
6738 record_line (last_subfile
, 0, address
);
6739 last_subfile
= current_subfile
;
6741 /* Append row to matrix using current values. */
6742 record_line (current_subfile
, line
,
6743 check_cu_functions (address
, cu
));
6748 else switch (op_code
)
6750 case DW_LNS_extended_op
:
6751 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6752 line_ptr
+= bytes_read
;
6753 extended_end
= line_ptr
+ extended_len
;
6754 extended_op
= read_1_byte (abfd
, line_ptr
);
6756 switch (extended_op
)
6758 case DW_LNE_end_sequence
:
6761 if (lh
->num_file_names
< file
)
6762 dwarf2_debug_line_missing_file_complaint ();
6765 lh
->file_names
[file
- 1].included_p
= 1;
6766 if (!decode_for_pst_p
)
6767 record_line (current_subfile
, 0, address
);
6770 case DW_LNE_set_address
:
6771 address
= read_address (abfd
, line_ptr
, cu
, &bytes_read
);
6772 line_ptr
+= bytes_read
;
6773 address
+= baseaddr
;
6775 case DW_LNE_define_file
:
6778 unsigned int dir_index
, mod_time
, length
;
6780 cur_file
= read_string (abfd
, line_ptr
, &bytes_read
);
6781 line_ptr
+= bytes_read
;
6783 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6784 line_ptr
+= bytes_read
;
6786 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6787 line_ptr
+= bytes_read
;
6789 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6790 line_ptr
+= bytes_read
;
6791 add_file_name (lh
, cur_file
, dir_index
, mod_time
, length
);
6795 complaint (&symfile_complaints
,
6796 _("mangled .debug_line section"));
6799 /* Make sure that we parsed the extended op correctly. If e.g.
6800 we expected a different address size than the producer used,
6801 we may have read the wrong number of bytes. */
6802 if (line_ptr
!= extended_end
)
6804 complaint (&symfile_complaints
,
6805 _("mangled .debug_line section"));
6810 if (lh
->num_file_names
< file
)
6811 dwarf2_debug_line_missing_file_complaint ();
6814 lh
->file_names
[file
- 1].included_p
= 1;
6815 if (!decode_for_pst_p
)
6817 if (last_subfile
!= current_subfile
)
6820 record_line (last_subfile
, 0, address
);
6821 last_subfile
= current_subfile
;
6823 record_line (current_subfile
, line
,
6824 check_cu_functions (address
, cu
));
6829 case DW_LNS_advance_pc
:
6830 address
+= lh
->minimum_instruction_length
6831 * read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6832 line_ptr
+= bytes_read
;
6834 case DW_LNS_advance_line
:
6835 line
+= read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
6836 line_ptr
+= bytes_read
;
6838 case DW_LNS_set_file
:
6840 /* The arrays lh->include_dirs and lh->file_names are
6841 0-based, but the directory and file name numbers in
6842 the statement program are 1-based. */
6843 struct file_entry
*fe
;
6846 file
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6847 line_ptr
+= bytes_read
;
6848 if (lh
->num_file_names
< file
)
6849 dwarf2_debug_line_missing_file_complaint ();
6852 fe
= &lh
->file_names
[file
- 1];
6854 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6855 if (!decode_for_pst_p
)
6857 last_subfile
= current_subfile
;
6858 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6863 case DW_LNS_set_column
:
6864 column
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6865 line_ptr
+= bytes_read
;
6867 case DW_LNS_negate_stmt
:
6868 is_stmt
= (!is_stmt
);
6870 case DW_LNS_set_basic_block
:
6873 /* Add to the address register of the state machine the
6874 address increment value corresponding to special opcode
6875 255. I.e., this value is scaled by the minimum
6876 instruction length since special opcode 255 would have
6877 scaled the the increment. */
6878 case DW_LNS_const_add_pc
:
6879 address
+= (lh
->minimum_instruction_length
6880 * ((255 - lh
->opcode_base
) / lh
->line_range
));
6882 case DW_LNS_fixed_advance_pc
:
6883 address
+= read_2_bytes (abfd
, line_ptr
);
6888 /* Unknown standard opcode, ignore it. */
6891 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
6893 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
6894 line_ptr
+= bytes_read
;
6901 if (decode_for_pst_p
)
6905 /* Now that we're done scanning the Line Header Program, we can
6906 create the psymtab of each included file. */
6907 for (file_index
= 0; file_index
< lh
->num_file_names
; file_index
++)
6908 if (lh
->file_names
[file_index
].included_p
== 1)
6910 const struct file_entry fe
= lh
->file_names
[file_index
];
6911 char *include_name
= fe
.name
;
6912 char *dir_name
= NULL
;
6913 char *pst_filename
= pst
->filename
;
6916 dir_name
= lh
->include_dirs
[fe
.dir_index
- 1];
6918 if (!IS_ABSOLUTE_PATH (include_name
) && dir_name
!= NULL
)
6920 include_name
= concat (dir_name
, SLASH_STRING
,
6921 include_name
, (char *)NULL
);
6922 make_cleanup (xfree
, include_name
);
6925 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
6927 pst_filename
= concat (pst
->dirname
, SLASH_STRING
,
6928 pst_filename
, (char *)NULL
);
6929 make_cleanup (xfree
, pst_filename
);
6932 if (strcmp (include_name
, pst_filename
) != 0)
6933 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
6938 /* Make sure a symtab is created for every file, even files
6939 which contain only variables (i.e. no code with associated
6943 struct file_entry
*fe
;
6945 for (i
= 0; i
< lh
->num_file_names
; i
++)
6948 fe
= &lh
->file_names
[i
];
6950 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
6951 dwarf2_start_subfile (fe
->name
, dir
, comp_dir
);
6953 /* Skip the main file; we don't need it, and it must be
6954 allocated last, so that it will show up before the
6955 non-primary symtabs in the objfile's symtab list. */
6956 if (current_subfile
== first_subfile
)
6959 if (current_subfile
->symtab
== NULL
)
6960 current_subfile
->symtab
= allocate_symtab (current_subfile
->name
,
6962 fe
->symtab
= current_subfile
->symtab
;
6967 /* Start a subfile for DWARF. FILENAME is the name of the file and
6968 DIRNAME the name of the source directory which contains FILENAME
6969 or NULL if not known. COMP_DIR is the compilation directory for the
6970 linetable's compilation unit or NULL if not known.
6971 This routine tries to keep line numbers from identical absolute and
6972 relative file names in a common subfile.
6974 Using the `list' example from the GDB testsuite, which resides in
6975 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
6976 of /srcdir/list0.c yields the following debugging information for list0.c:
6978 DW_AT_name: /srcdir/list0.c
6979 DW_AT_comp_dir: /compdir
6980 files.files[0].name: list0.h
6981 files.files[0].dir: /srcdir
6982 files.files[1].name: list0.c
6983 files.files[1].dir: /srcdir
6985 The line number information for list0.c has to end up in a single
6986 subfile, so that `break /srcdir/list0.c:1' works as expected.
6987 start_subfile will ensure that this happens provided that we pass the
6988 concatenation of files.files[1].dir and files.files[1].name as the
6992 dwarf2_start_subfile (char *filename
, char *dirname
, char *comp_dir
)
6996 /* While reading the DIEs, we call start_symtab(DW_AT_name, DW_AT_comp_dir).
6997 `start_symtab' will always pass the contents of DW_AT_comp_dir as
6998 second argument to start_subfile. To be consistent, we do the
6999 same here. In order not to lose the line information directory,
7000 we concatenate it to the filename when it makes sense.
7001 Note that the Dwarf3 standard says (speaking of filenames in line
7002 information): ``The directory index is ignored for file names
7003 that represent full path names''. Thus ignoring dirname in the
7004 `else' branch below isn't an issue. */
7006 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
7007 fullname
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
7009 fullname
= filename
;
7011 start_subfile (fullname
, comp_dir
);
7013 if (fullname
!= filename
)
7018 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
7019 struct dwarf2_cu
*cu
)
7021 struct objfile
*objfile
= cu
->objfile
;
7022 struct comp_unit_head
*cu_header
= &cu
->header
;
7024 /* NOTE drow/2003-01-30: There used to be a comment and some special
7025 code here to turn a symbol with DW_AT_external and a
7026 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
7027 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
7028 with some versions of binutils) where shared libraries could have
7029 relocations against symbols in their debug information - the
7030 minimal symbol would have the right address, but the debug info
7031 would not. It's no longer necessary, because we will explicitly
7032 apply relocations when we read in the debug information now. */
7034 /* A DW_AT_location attribute with no contents indicates that a
7035 variable has been optimized away. */
7036 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
7038 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7042 /* Handle one degenerate form of location expression specially, to
7043 preserve GDB's previous behavior when section offsets are
7044 specified. If this is just a DW_OP_addr then mark this symbol
7047 if (attr_form_is_block (attr
)
7048 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
7049 && DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
7053 SYMBOL_VALUE_ADDRESS (sym
) =
7054 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
7055 fixup_symbol_section (sym
, objfile
);
7056 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
7057 SYMBOL_SECTION (sym
));
7058 SYMBOL_CLASS (sym
) = LOC_STATIC
;
7062 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
7063 expression evaluator, and use LOC_COMPUTED only when necessary
7064 (i.e. when the value of a register or memory location is
7065 referenced, or a thread-local block, etc.). Then again, it might
7066 not be worthwhile. I'm assuming that it isn't unless performance
7067 or memory numbers show me otherwise. */
7069 dwarf2_symbol_mark_computed (attr
, sym
, cu
);
7070 SYMBOL_CLASS (sym
) = LOC_COMPUTED
;
7073 /* Given a pointer to a DWARF information entry, figure out if we need
7074 to make a symbol table entry for it, and if so, create a new entry
7075 and return a pointer to it.
7076 If TYPE is NULL, determine symbol type from the die, otherwise
7077 used the passed type. */
7079 static struct symbol
*
7080 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
7082 struct objfile
*objfile
= cu
->objfile
;
7083 struct symbol
*sym
= NULL
;
7085 struct attribute
*attr
= NULL
;
7086 struct attribute
*attr2
= NULL
;
7089 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7091 if (die
->tag
!= DW_TAG_namespace
)
7092 name
= dwarf2_linkage_name (die
, cu
);
7094 name
= TYPE_NAME (type
);
7098 sym
= (struct symbol
*) obstack_alloc (&objfile
->objfile_obstack
,
7099 sizeof (struct symbol
));
7100 OBJSTAT (objfile
, n_syms
++);
7101 memset (sym
, 0, sizeof (struct symbol
));
7103 /* Cache this symbol's name and the name's demangled form (if any). */
7104 SYMBOL_LANGUAGE (sym
) = cu
->language
;
7105 SYMBOL_SET_NAMES (sym
, name
, strlen (name
), objfile
);
7107 /* Default assumptions.
7108 Use the passed type or decode it from the die. */
7109 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7110 SYMBOL_CLASS (sym
) = LOC_OPTIMIZED_OUT
;
7112 SYMBOL_TYPE (sym
) = type
;
7114 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
7115 attr
= dwarf2_attr (die
, DW_AT_decl_line
, cu
);
7118 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
7121 attr
= dwarf2_attr (die
, DW_AT_decl_file
, cu
);
7124 int file_index
= DW_UNSND (attr
);
7125 if (cu
->line_header
== NULL
7126 || file_index
> cu
->line_header
->num_file_names
)
7127 complaint (&symfile_complaints
,
7128 _("file index out of range"));
7129 else if (file_index
> 0)
7131 struct file_entry
*fe
;
7132 fe
= &cu
->line_header
->file_names
[file_index
- 1];
7133 SYMBOL_SYMTAB (sym
) = fe
->symtab
;
7140 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
7143 SYMBOL_VALUE_ADDRESS (sym
) = DW_ADDR (attr
) + baseaddr
;
7145 SYMBOL_CLASS (sym
) = LOC_LABEL
;
7147 case DW_TAG_subprogram
:
7148 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
7150 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
7151 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7152 if (attr2
&& (DW_UNSND (attr2
) != 0))
7154 add_symbol_to_list (sym
, &global_symbols
);
7158 add_symbol_to_list (sym
, cu
->list_in_scope
);
7161 case DW_TAG_variable
:
7162 /* Compilation with minimal debug info may result in variables
7163 with missing type entries. Change the misleading `void' type
7164 to something sensible. */
7165 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
7167 = builtin_type (current_gdbarch
)->nodebug_data_symbol
;
7169 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7172 dwarf2_const_value (attr
, sym
, cu
);
7173 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7174 if (attr2
&& (DW_UNSND (attr2
) != 0))
7175 add_symbol_to_list (sym
, &global_symbols
);
7177 add_symbol_to_list (sym
, cu
->list_in_scope
);
7180 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7183 var_decode_location (attr
, sym
, cu
);
7184 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7185 if (attr2
&& (DW_UNSND (attr2
) != 0))
7186 add_symbol_to_list (sym
, &global_symbols
);
7188 add_symbol_to_list (sym
, cu
->list_in_scope
);
7192 /* We do not know the address of this symbol.
7193 If it is an external symbol and we have type information
7194 for it, enter the symbol as a LOC_UNRESOLVED symbol.
7195 The address of the variable will then be determined from
7196 the minimal symbol table whenever the variable is
7198 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
7199 if (attr2
&& (DW_UNSND (attr2
) != 0)
7200 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
7202 SYMBOL_CLASS (sym
) = LOC_UNRESOLVED
;
7203 add_symbol_to_list (sym
, &global_symbols
);
7207 case DW_TAG_formal_parameter
:
7208 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
7211 var_decode_location (attr
, sym
, cu
);
7212 /* FIXME drow/2003-07-31: Is LOC_COMPUTED_ARG necessary? */
7213 if (SYMBOL_CLASS (sym
) == LOC_COMPUTED
)
7214 SYMBOL_CLASS (sym
) = LOC_COMPUTED_ARG
;
7216 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7219 dwarf2_const_value (attr
, sym
, cu
);
7221 add_symbol_to_list (sym
, cu
->list_in_scope
);
7223 case DW_TAG_unspecified_parameters
:
7224 /* From varargs functions; gdb doesn't seem to have any
7225 interest in this information, so just ignore it for now.
7228 case DW_TAG_class_type
:
7229 case DW_TAG_structure_type
:
7230 case DW_TAG_union_type
:
7231 case DW_TAG_set_type
:
7232 case DW_TAG_enumeration_type
:
7233 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7234 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
7236 /* Make sure that the symbol includes appropriate enclosing
7237 classes/namespaces in its name. These are calculated in
7238 read_structure_type, and the correct name is saved in
7241 if (cu
->language
== language_cplus
7242 || cu
->language
== language_java
)
7244 struct type
*type
= SYMBOL_TYPE (sym
);
7246 if (TYPE_TAG_NAME (type
) != NULL
)
7248 /* FIXME: carlton/2003-11-10: Should this use
7249 SYMBOL_SET_NAMES instead? (The same problem also
7250 arises further down in this function.) */
7251 /* The type's name is already allocated along with
7252 this objfile, so we don't need to duplicate it
7254 SYMBOL_LINKAGE_NAME (sym
) = TYPE_TAG_NAME (type
);
7259 /* NOTE: carlton/2003-11-10: C++ and Java class symbols shouldn't
7260 really ever be static objects: otherwise, if you try
7261 to, say, break of a class's method and you're in a file
7262 which doesn't mention that class, it won't work unless
7263 the check for all static symbols in lookup_symbol_aux
7264 saves you. See the OtherFileClass tests in
7265 gdb.c++/namespace.exp. */
7267 struct pending
**list_to_add
;
7269 list_to_add
= (cu
->list_in_scope
== &file_symbols
7270 && (cu
->language
== language_cplus
7271 || cu
->language
== language_java
)
7272 ? &global_symbols
: cu
->list_in_scope
);
7274 add_symbol_to_list (sym
, list_to_add
);
7276 /* The semantics of C++ state that "struct foo { ... }" also
7277 defines a typedef for "foo". A Java class declaration also
7278 defines a typedef for the class. Synthesize a typedef symbol
7279 so that "ptype foo" works as expected. */
7280 if (cu
->language
== language_cplus
7281 || cu
->language
== language_java
7282 || cu
->language
== language_ada
)
7284 struct symbol
*typedef_sym
= (struct symbol
*)
7285 obstack_alloc (&objfile
->objfile_obstack
,
7286 sizeof (struct symbol
));
7287 *typedef_sym
= *sym
;
7288 SYMBOL_DOMAIN (typedef_sym
) = VAR_DOMAIN
;
7289 /* The symbol's name is already allocated along with
7290 this objfile, so we don't need to duplicate it for
7292 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
7293 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
7294 add_symbol_to_list (typedef_sym
, list_to_add
);
7298 case DW_TAG_typedef
:
7299 if (processing_has_namespace_info
7300 && processing_current_prefix
[0] != '\0')
7302 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7303 processing_current_prefix
,
7306 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7307 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7308 add_symbol_to_list (sym
, cu
->list_in_scope
);
7310 case DW_TAG_base_type
:
7311 case DW_TAG_subrange_type
:
7312 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7313 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
7314 add_symbol_to_list (sym
, cu
->list_in_scope
);
7316 case DW_TAG_enumerator
:
7317 if (processing_has_namespace_info
7318 && processing_current_prefix
[0] != '\0')
7320 SYMBOL_LINKAGE_NAME (sym
) = typename_concat (&objfile
->objfile_obstack
,
7321 processing_current_prefix
,
7324 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
7327 dwarf2_const_value (attr
, sym
, cu
);
7330 /* NOTE: carlton/2003-11-10: See comment above in the
7331 DW_TAG_class_type, etc. block. */
7333 struct pending
**list_to_add
;
7335 list_to_add
= (cu
->list_in_scope
== &file_symbols
7336 && (cu
->language
== language_cplus
7337 || cu
->language
== language_java
)
7338 ? &global_symbols
: cu
->list_in_scope
);
7340 add_symbol_to_list (sym
, list_to_add
);
7343 case DW_TAG_namespace
:
7344 SYMBOL_CLASS (sym
) = LOC_TYPEDEF
;
7345 add_symbol_to_list (sym
, &global_symbols
);
7348 /* Not a tag we recognize. Hopefully we aren't processing
7349 trash data, but since we must specifically ignore things
7350 we don't recognize, there is nothing else we should do at
7352 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
7353 dwarf_tag_name (die
->tag
));
7360 /* Copy constant value from an attribute to a symbol. */
7363 dwarf2_const_value (struct attribute
*attr
, struct symbol
*sym
,
7364 struct dwarf2_cu
*cu
)
7366 struct objfile
*objfile
= cu
->objfile
;
7367 struct comp_unit_head
*cu_header
= &cu
->header
;
7368 struct dwarf_block
*blk
;
7373 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != cu_header
->addr_size
)
7374 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7375 cu_header
->addr_size
,
7376 TYPE_LENGTH (SYMBOL_TYPE
7378 SYMBOL_VALUE_BYTES (sym
) =
7379 obstack_alloc (&objfile
->objfile_obstack
, cu_header
->addr_size
);
7380 /* NOTE: cagney/2003-05-09: In-lined store_address call with
7381 it's body - store_unsigned_integer. */
7382 store_unsigned_integer (SYMBOL_VALUE_BYTES (sym
), cu_header
->addr_size
,
7384 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7386 case DW_FORM_block1
:
7387 case DW_FORM_block2
:
7388 case DW_FORM_block4
:
7390 blk
= DW_BLOCK (attr
);
7391 if (TYPE_LENGTH (SYMBOL_TYPE (sym
)) != blk
->size
)
7392 dwarf2_const_value_length_mismatch_complaint (DEPRECATED_SYMBOL_NAME (sym
),
7394 TYPE_LENGTH (SYMBOL_TYPE
7396 SYMBOL_VALUE_BYTES (sym
) =
7397 obstack_alloc (&objfile
->objfile_obstack
, blk
->size
);
7398 memcpy (SYMBOL_VALUE_BYTES (sym
), blk
->data
, blk
->size
);
7399 SYMBOL_CLASS (sym
) = LOC_CONST_BYTES
;
7402 /* The DW_AT_const_value attributes are supposed to carry the
7403 symbol's value "represented as it would be on the target
7404 architecture." By the time we get here, it's already been
7405 converted to host endianness, so we just need to sign- or
7406 zero-extend it as appropriate. */
7408 dwarf2_const_value_data (attr
, sym
, 8);
7411 dwarf2_const_value_data (attr
, sym
, 16);
7414 dwarf2_const_value_data (attr
, sym
, 32);
7417 dwarf2_const_value_data (attr
, sym
, 64);
7421 SYMBOL_VALUE (sym
) = DW_SND (attr
);
7422 SYMBOL_CLASS (sym
) = LOC_CONST
;
7426 SYMBOL_VALUE (sym
) = DW_UNSND (attr
);
7427 SYMBOL_CLASS (sym
) = LOC_CONST
;
7431 complaint (&symfile_complaints
,
7432 _("unsupported const value attribute form: '%s'"),
7433 dwarf_form_name (attr
->form
));
7434 SYMBOL_VALUE (sym
) = 0;
7435 SYMBOL_CLASS (sym
) = LOC_CONST
;
7441 /* Given an attr with a DW_FORM_dataN value in host byte order, sign-
7442 or zero-extend it as appropriate for the symbol's type. */
7444 dwarf2_const_value_data (struct attribute
*attr
,
7448 LONGEST l
= DW_UNSND (attr
);
7450 if (bits
< sizeof (l
) * 8)
7452 if (TYPE_UNSIGNED (SYMBOL_TYPE (sym
)))
7453 l
&= ((LONGEST
) 1 << bits
) - 1;
7455 l
= (l
<< (sizeof (l
) * 8 - bits
)) >> (sizeof (l
) * 8 - bits
);
7458 SYMBOL_VALUE (sym
) = l
;
7459 SYMBOL_CLASS (sym
) = LOC_CONST
;
7463 /* Return the type of the die in question using its DW_AT_type attribute. */
7465 static struct type
*
7466 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7469 struct attribute
*type_attr
;
7470 struct die_info
*type_die
;
7472 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
7475 /* A missing DW_AT_type represents a void type. */
7476 return dwarf2_fundamental_type (cu
->objfile
, FT_VOID
, cu
);
7479 type_die
= follow_die_ref (die
, type_attr
, cu
);
7481 type
= tag_type_to_type (type_die
, cu
);
7484 dump_die (type_die
);
7485 error (_("Dwarf Error: Problem turning type die at offset into gdb type [in module %s]"),
7491 /* Return the containing type of the die in question using its
7492 DW_AT_containing_type attribute. */
7494 static struct type
*
7495 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7497 struct type
*type
= NULL
;
7498 struct attribute
*type_attr
;
7499 struct die_info
*type_die
= NULL
;
7501 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
7504 type_die
= follow_die_ref (die
, type_attr
, cu
);
7505 type
= tag_type_to_type (type_die
, cu
);
7510 dump_die (type_die
);
7511 error (_("Dwarf Error: Problem turning containing type into gdb type [in module %s]"),
7517 static struct type
*
7518 tag_type_to_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
7526 read_type_die (die
, cu
);
7530 error (_("Dwarf Error: Cannot find type of die [in module %s]"),
7538 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
7540 char *prefix
= determine_prefix (die
, cu
);
7541 const char *old_prefix
= processing_current_prefix
;
7542 struct cleanup
*back_to
= make_cleanup (xfree
, prefix
);
7543 processing_current_prefix
= prefix
;
7547 case DW_TAG_class_type
:
7548 case DW_TAG_structure_type
:
7549 case DW_TAG_union_type
:
7550 read_structure_type (die
, cu
);
7552 case DW_TAG_enumeration_type
:
7553 read_enumeration_type (die
, cu
);
7555 case DW_TAG_subprogram
:
7556 case DW_TAG_subroutine_type
:
7557 read_subroutine_type (die
, cu
);
7559 case DW_TAG_array_type
:
7560 read_array_type (die
, cu
);
7562 case DW_TAG_set_type
:
7563 read_set_type (die
, cu
);
7565 case DW_TAG_pointer_type
:
7566 read_tag_pointer_type (die
, cu
);
7568 case DW_TAG_ptr_to_member_type
:
7569 read_tag_ptr_to_member_type (die
, cu
);
7571 case DW_TAG_reference_type
:
7572 read_tag_reference_type (die
, cu
);
7574 case DW_TAG_const_type
:
7575 read_tag_const_type (die
, cu
);
7577 case DW_TAG_volatile_type
:
7578 read_tag_volatile_type (die
, cu
);
7580 case DW_TAG_string_type
:
7581 read_tag_string_type (die
, cu
);
7583 case DW_TAG_typedef
:
7584 read_typedef (die
, cu
);
7586 case DW_TAG_subrange_type
:
7587 read_subrange_type (die
, cu
);
7589 case DW_TAG_base_type
:
7590 read_base_type (die
, cu
);
7592 case DW_TAG_unspecified_type
:
7593 read_unspecified_type (die
, cu
);
7596 complaint (&symfile_complaints
, _("unexpected tag in read_type_die: '%s'"),
7597 dwarf_tag_name (die
->tag
));
7601 processing_current_prefix
= old_prefix
;
7602 do_cleanups (back_to
);
7605 /* Return the name of the namespace/class that DIE is defined within,
7606 or "" if we can't tell. The caller should xfree the result. */
7608 /* NOTE: carlton/2004-01-23: See read_func_scope (and the comment
7609 therein) for an example of how to use this function to deal with
7610 DW_AT_specification. */
7613 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
7615 struct die_info
*parent
;
7617 if (cu
->language
!= language_cplus
7618 && cu
->language
!= language_java
)
7621 parent
= die
->parent
;
7625 return xstrdup ("");
7629 switch (parent
->tag
) {
7630 case DW_TAG_namespace
:
7632 /* FIXME: carlton/2004-03-05: Should I follow extension dies
7633 before doing this check? */
7634 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7636 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7641 char *parent_prefix
= determine_prefix (parent
, cu
);
7642 char *retval
= typename_concat (NULL
, parent_prefix
,
7643 namespace_name (parent
, &dummy
,
7646 xfree (parent_prefix
);
7651 case DW_TAG_class_type
:
7652 case DW_TAG_structure_type
:
7654 if (parent
->type
!= NULL
&& TYPE_TAG_NAME (parent
->type
) != NULL
)
7656 return xstrdup (TYPE_TAG_NAME (parent
->type
));
7660 const char *old_prefix
= processing_current_prefix
;
7661 char *new_prefix
= determine_prefix (parent
, cu
);
7664 processing_current_prefix
= new_prefix
;
7665 retval
= determine_class_name (parent
, cu
);
7666 processing_current_prefix
= old_prefix
;
7673 return determine_prefix (parent
, cu
);
7678 /* Return a newly-allocated string formed by concatenating PREFIX and
7679 SUFFIX with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
7680 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null,
7681 perform an obconcat, otherwise allocate storage for the result. The CU argument
7682 is used to determine the language and hence, the appropriate separator. */
7684 #define MAX_SEP_LEN 2 /* sizeof ("::") */
7687 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
7688 struct dwarf2_cu
*cu
)
7692 if (suffix
== NULL
|| suffix
[0] == '\0' || prefix
== NULL
|| prefix
[0] == '\0')
7694 else if (cu
->language
== language_java
)
7701 char *retval
= xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1);
7706 strcpy (retval
, prefix
);
7707 strcat (retval
, sep
);
7710 strcat (retval
, suffix
);
7716 /* We have an obstack. */
7717 return obconcat (obs
, prefix
, sep
, suffix
);
7721 static struct type
*
7722 dwarf_base_type (int encoding
, int size
, struct dwarf2_cu
*cu
)
7724 struct objfile
*objfile
= cu
->objfile
;
7726 /* FIXME - this should not produce a new (struct type *)
7727 every time. It should cache base types. */
7731 case DW_ATE_address
:
7732 type
= dwarf2_fundamental_type (objfile
, FT_VOID
, cu
);
7734 case DW_ATE_boolean
:
7735 type
= dwarf2_fundamental_type (objfile
, FT_BOOLEAN
, cu
);
7737 case DW_ATE_complex_float
:
7740 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_COMPLEX
, cu
);
7744 type
= dwarf2_fundamental_type (objfile
, FT_COMPLEX
, cu
);
7750 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_FLOAT
, cu
);
7754 type
= dwarf2_fundamental_type (objfile
, FT_FLOAT
, cu
);
7757 case DW_ATE_decimal_float
:
7759 type
= dwarf2_fundamental_type (objfile
, FT_DBL_PREC_DECFLOAT
, cu
);
7761 type
= dwarf2_fundamental_type (objfile
, FT_EXT_PREC_DECFLOAT
, cu
);
7763 type
= dwarf2_fundamental_type (objfile
, FT_DECFLOAT
, cu
);
7769 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
, cu
);
7772 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_SHORT
, cu
);
7776 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
, cu
);
7780 case DW_ATE_signed_char
:
7781 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_CHAR
, cu
);
7783 case DW_ATE_unsigned
:
7787 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
, cu
);
7790 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_SHORT
, cu
);
7794 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_INTEGER
, cu
);
7798 case DW_ATE_unsigned_char
:
7799 type
= dwarf2_fundamental_type (objfile
, FT_UNSIGNED_CHAR
, cu
);
7802 type
= dwarf2_fundamental_type (objfile
, FT_SIGNED_INTEGER
, cu
);
7809 copy_die (struct die_info
*old_die
)
7811 struct die_info
*new_die
;
7814 new_die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
7815 memset (new_die
, 0, sizeof (struct die_info
));
7817 new_die
->tag
= old_die
->tag
;
7818 new_die
->has_children
= old_die
->has_children
;
7819 new_die
->abbrev
= old_die
->abbrev
;
7820 new_die
->offset
= old_die
->offset
;
7821 new_die
->type
= NULL
;
7823 num_attrs
= old_die
->num_attrs
;
7824 new_die
->num_attrs
= num_attrs
;
7825 new_die
->attrs
= (struct attribute
*)
7826 xmalloc (num_attrs
* sizeof (struct attribute
));
7828 for (i
= 0; i
< old_die
->num_attrs
; ++i
)
7830 new_die
->attrs
[i
].name
= old_die
->attrs
[i
].name
;
7831 new_die
->attrs
[i
].form
= old_die
->attrs
[i
].form
;
7832 new_die
->attrs
[i
].u
.addr
= old_die
->attrs
[i
].u
.addr
;
7835 new_die
->next
= NULL
;
7840 /* Return sibling of die, NULL if no sibling. */
7842 static struct die_info
*
7843 sibling_die (struct die_info
*die
)
7845 return die
->sibling
;
7848 /* Get linkage name of a die, return NULL if not found. */
7851 dwarf2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7853 struct attribute
*attr
;
7855 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
7856 if (attr
&& DW_STRING (attr
))
7857 return DW_STRING (attr
);
7858 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7859 if (attr
&& DW_STRING (attr
))
7860 return DW_STRING (attr
);
7864 /* Get name of a die, return NULL if not found. */
7867 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
7869 struct attribute
*attr
;
7871 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
7872 if (attr
&& DW_STRING (attr
))
7873 return DW_STRING (attr
);
7877 /* Return the die that this die in an extension of, or NULL if there
7880 static struct die_info
*
7881 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
*cu
)
7883 struct attribute
*attr
;
7885 attr
= dwarf2_attr (die
, DW_AT_extension
, cu
);
7889 return follow_die_ref (die
, attr
, cu
);
7892 /* Convert a DIE tag into its string name. */
7895 dwarf_tag_name (unsigned tag
)
7899 case DW_TAG_padding
:
7900 return "DW_TAG_padding";
7901 case DW_TAG_array_type
:
7902 return "DW_TAG_array_type";
7903 case DW_TAG_class_type
:
7904 return "DW_TAG_class_type";
7905 case DW_TAG_entry_point
:
7906 return "DW_TAG_entry_point";
7907 case DW_TAG_enumeration_type
:
7908 return "DW_TAG_enumeration_type";
7909 case DW_TAG_formal_parameter
:
7910 return "DW_TAG_formal_parameter";
7911 case DW_TAG_imported_declaration
:
7912 return "DW_TAG_imported_declaration";
7914 return "DW_TAG_label";
7915 case DW_TAG_lexical_block
:
7916 return "DW_TAG_lexical_block";
7918 return "DW_TAG_member";
7919 case DW_TAG_pointer_type
:
7920 return "DW_TAG_pointer_type";
7921 case DW_TAG_reference_type
:
7922 return "DW_TAG_reference_type";
7923 case DW_TAG_compile_unit
:
7924 return "DW_TAG_compile_unit";
7925 case DW_TAG_string_type
:
7926 return "DW_TAG_string_type";
7927 case DW_TAG_structure_type
:
7928 return "DW_TAG_structure_type";
7929 case DW_TAG_subroutine_type
:
7930 return "DW_TAG_subroutine_type";
7931 case DW_TAG_typedef
:
7932 return "DW_TAG_typedef";
7933 case DW_TAG_union_type
:
7934 return "DW_TAG_union_type";
7935 case DW_TAG_unspecified_parameters
:
7936 return "DW_TAG_unspecified_parameters";
7937 case DW_TAG_variant
:
7938 return "DW_TAG_variant";
7939 case DW_TAG_common_block
:
7940 return "DW_TAG_common_block";
7941 case DW_TAG_common_inclusion
:
7942 return "DW_TAG_common_inclusion";
7943 case DW_TAG_inheritance
:
7944 return "DW_TAG_inheritance";
7945 case DW_TAG_inlined_subroutine
:
7946 return "DW_TAG_inlined_subroutine";
7948 return "DW_TAG_module";
7949 case DW_TAG_ptr_to_member_type
:
7950 return "DW_TAG_ptr_to_member_type";
7951 case DW_TAG_set_type
:
7952 return "DW_TAG_set_type";
7953 case DW_TAG_subrange_type
:
7954 return "DW_TAG_subrange_type";
7955 case DW_TAG_with_stmt
:
7956 return "DW_TAG_with_stmt";
7957 case DW_TAG_access_declaration
:
7958 return "DW_TAG_access_declaration";
7959 case DW_TAG_base_type
:
7960 return "DW_TAG_base_type";
7961 case DW_TAG_catch_block
:
7962 return "DW_TAG_catch_block";
7963 case DW_TAG_const_type
:
7964 return "DW_TAG_const_type";
7965 case DW_TAG_constant
:
7966 return "DW_TAG_constant";
7967 case DW_TAG_enumerator
:
7968 return "DW_TAG_enumerator";
7969 case DW_TAG_file_type
:
7970 return "DW_TAG_file_type";
7972 return "DW_TAG_friend";
7973 case DW_TAG_namelist
:
7974 return "DW_TAG_namelist";
7975 case DW_TAG_namelist_item
:
7976 return "DW_TAG_namelist_item";
7977 case DW_TAG_packed_type
:
7978 return "DW_TAG_packed_type";
7979 case DW_TAG_subprogram
:
7980 return "DW_TAG_subprogram";
7981 case DW_TAG_template_type_param
:
7982 return "DW_TAG_template_type_param";
7983 case DW_TAG_template_value_param
:
7984 return "DW_TAG_template_value_param";
7985 case DW_TAG_thrown_type
:
7986 return "DW_TAG_thrown_type";
7987 case DW_TAG_try_block
:
7988 return "DW_TAG_try_block";
7989 case DW_TAG_variant_part
:
7990 return "DW_TAG_variant_part";
7991 case DW_TAG_variable
:
7992 return "DW_TAG_variable";
7993 case DW_TAG_volatile_type
:
7994 return "DW_TAG_volatile_type";
7995 case DW_TAG_dwarf_procedure
:
7996 return "DW_TAG_dwarf_procedure";
7997 case DW_TAG_restrict_type
:
7998 return "DW_TAG_restrict_type";
7999 case DW_TAG_interface_type
:
8000 return "DW_TAG_interface_type";
8001 case DW_TAG_namespace
:
8002 return "DW_TAG_namespace";
8003 case DW_TAG_imported_module
:
8004 return "DW_TAG_imported_module";
8005 case DW_TAG_unspecified_type
:
8006 return "DW_TAG_unspecified_type";
8007 case DW_TAG_partial_unit
:
8008 return "DW_TAG_partial_unit";
8009 case DW_TAG_imported_unit
:
8010 return "DW_TAG_imported_unit";
8011 case DW_TAG_condition
:
8012 return "DW_TAG_condition";
8013 case DW_TAG_shared_type
:
8014 return "DW_TAG_shared_type";
8015 case DW_TAG_MIPS_loop
:
8016 return "DW_TAG_MIPS_loop";
8017 case DW_TAG_HP_array_descriptor
:
8018 return "DW_TAG_HP_array_descriptor";
8019 case DW_TAG_format_label
:
8020 return "DW_TAG_format_label";
8021 case DW_TAG_function_template
:
8022 return "DW_TAG_function_template";
8023 case DW_TAG_class_template
:
8024 return "DW_TAG_class_template";
8025 case DW_TAG_GNU_BINCL
:
8026 return "DW_TAG_GNU_BINCL";
8027 case DW_TAG_GNU_EINCL
:
8028 return "DW_TAG_GNU_EINCL";
8029 case DW_TAG_upc_shared_type
:
8030 return "DW_TAG_upc_shared_type";
8031 case DW_TAG_upc_strict_type
:
8032 return "DW_TAG_upc_strict_type";
8033 case DW_TAG_upc_relaxed_type
:
8034 return "DW_TAG_upc_relaxed_type";
8035 case DW_TAG_PGI_kanji_type
:
8036 return "DW_TAG_PGI_kanji_type";
8037 case DW_TAG_PGI_interface_block
:
8038 return "DW_TAG_PGI_interface_block";
8040 return "DW_TAG_<unknown>";
8044 /* Convert a DWARF attribute code into its string name. */
8047 dwarf_attr_name (unsigned attr
)
8052 return "DW_AT_sibling";
8053 case DW_AT_location
:
8054 return "DW_AT_location";
8056 return "DW_AT_name";
8057 case DW_AT_ordering
:
8058 return "DW_AT_ordering";
8059 case DW_AT_subscr_data
:
8060 return "DW_AT_subscr_data";
8061 case DW_AT_byte_size
:
8062 return "DW_AT_byte_size";
8063 case DW_AT_bit_offset
:
8064 return "DW_AT_bit_offset";
8065 case DW_AT_bit_size
:
8066 return "DW_AT_bit_size";
8067 case DW_AT_element_list
:
8068 return "DW_AT_element_list";
8069 case DW_AT_stmt_list
:
8070 return "DW_AT_stmt_list";
8072 return "DW_AT_low_pc";
8074 return "DW_AT_high_pc";
8075 case DW_AT_language
:
8076 return "DW_AT_language";
8078 return "DW_AT_member";
8080 return "DW_AT_discr";
8081 case DW_AT_discr_value
:
8082 return "DW_AT_discr_value";
8083 case DW_AT_visibility
:
8084 return "DW_AT_visibility";
8086 return "DW_AT_import";
8087 case DW_AT_string_length
:
8088 return "DW_AT_string_length";
8089 case DW_AT_common_reference
:
8090 return "DW_AT_common_reference";
8091 case DW_AT_comp_dir
:
8092 return "DW_AT_comp_dir";
8093 case DW_AT_const_value
:
8094 return "DW_AT_const_value";
8095 case DW_AT_containing_type
:
8096 return "DW_AT_containing_type";
8097 case DW_AT_default_value
:
8098 return "DW_AT_default_value";
8100 return "DW_AT_inline";
8101 case DW_AT_is_optional
:
8102 return "DW_AT_is_optional";
8103 case DW_AT_lower_bound
:
8104 return "DW_AT_lower_bound";
8105 case DW_AT_producer
:
8106 return "DW_AT_producer";
8107 case DW_AT_prototyped
:
8108 return "DW_AT_prototyped";
8109 case DW_AT_return_addr
:
8110 return "DW_AT_return_addr";
8111 case DW_AT_start_scope
:
8112 return "DW_AT_start_scope";
8113 case DW_AT_stride_size
:
8114 return "DW_AT_stride_size";
8115 case DW_AT_upper_bound
:
8116 return "DW_AT_upper_bound";
8117 case DW_AT_abstract_origin
:
8118 return "DW_AT_abstract_origin";
8119 case DW_AT_accessibility
:
8120 return "DW_AT_accessibility";
8121 case DW_AT_address_class
:
8122 return "DW_AT_address_class";
8123 case DW_AT_artificial
:
8124 return "DW_AT_artificial";
8125 case DW_AT_base_types
:
8126 return "DW_AT_base_types";
8127 case DW_AT_calling_convention
:
8128 return "DW_AT_calling_convention";
8130 return "DW_AT_count";
8131 case DW_AT_data_member_location
:
8132 return "DW_AT_data_member_location";
8133 case DW_AT_decl_column
:
8134 return "DW_AT_decl_column";
8135 case DW_AT_decl_file
:
8136 return "DW_AT_decl_file";
8137 case DW_AT_decl_line
:
8138 return "DW_AT_decl_line";
8139 case DW_AT_declaration
:
8140 return "DW_AT_declaration";
8141 case DW_AT_discr_list
:
8142 return "DW_AT_discr_list";
8143 case DW_AT_encoding
:
8144 return "DW_AT_encoding";
8145 case DW_AT_external
:
8146 return "DW_AT_external";
8147 case DW_AT_frame_base
:
8148 return "DW_AT_frame_base";
8150 return "DW_AT_friend";
8151 case DW_AT_identifier_case
:
8152 return "DW_AT_identifier_case";
8153 case DW_AT_macro_info
:
8154 return "DW_AT_macro_info";
8155 case DW_AT_namelist_items
:
8156 return "DW_AT_namelist_items";
8157 case DW_AT_priority
:
8158 return "DW_AT_priority";
8160 return "DW_AT_segment";
8161 case DW_AT_specification
:
8162 return "DW_AT_specification";
8163 case DW_AT_static_link
:
8164 return "DW_AT_static_link";
8166 return "DW_AT_type";
8167 case DW_AT_use_location
:
8168 return "DW_AT_use_location";
8169 case DW_AT_variable_parameter
:
8170 return "DW_AT_variable_parameter";
8171 case DW_AT_virtuality
:
8172 return "DW_AT_virtuality";
8173 case DW_AT_vtable_elem_location
:
8174 return "DW_AT_vtable_elem_location";
8175 /* DWARF 3 values. */
8176 case DW_AT_allocated
:
8177 return "DW_AT_allocated";
8178 case DW_AT_associated
:
8179 return "DW_AT_associated";
8180 case DW_AT_data_location
:
8181 return "DW_AT_data_location";
8183 return "DW_AT_stride";
8184 case DW_AT_entry_pc
:
8185 return "DW_AT_entry_pc";
8186 case DW_AT_use_UTF8
:
8187 return "DW_AT_use_UTF8";
8188 case DW_AT_extension
:
8189 return "DW_AT_extension";
8191 return "DW_AT_ranges";
8192 case DW_AT_trampoline
:
8193 return "DW_AT_trampoline";
8194 case DW_AT_call_column
:
8195 return "DW_AT_call_column";
8196 case DW_AT_call_file
:
8197 return "DW_AT_call_file";
8198 case DW_AT_call_line
:
8199 return "DW_AT_call_line";
8200 case DW_AT_description
:
8201 return "DW_AT_description";
8202 case DW_AT_binary_scale
:
8203 return "DW_AT_binary_scale";
8204 case DW_AT_decimal_scale
:
8205 return "DW_AT_decimal_scale";
8207 return "DW_AT_small";
8208 case DW_AT_decimal_sign
:
8209 return "DW_AT_decimal_sign";
8210 case DW_AT_digit_count
:
8211 return "DW_AT_digit_count";
8212 case DW_AT_picture_string
:
8213 return "DW_AT_picture_string";
8215 return "DW_AT_mutable";
8216 case DW_AT_threads_scaled
:
8217 return "DW_AT_threads_scaled";
8218 case DW_AT_explicit
:
8219 return "DW_AT_explicit";
8220 case DW_AT_object_pointer
:
8221 return "DW_AT_object_pointer";
8222 case DW_AT_endianity
:
8223 return "DW_AT_endianity";
8224 case DW_AT_elemental
:
8225 return "DW_AT_elemental";
8227 return "DW_AT_pure";
8228 case DW_AT_recursive
:
8229 return "DW_AT_recursive";
8231 /* SGI/MIPS extensions. */
8232 case DW_AT_MIPS_fde
:
8233 return "DW_AT_MIPS_fde";
8234 case DW_AT_MIPS_loop_begin
:
8235 return "DW_AT_MIPS_loop_begin";
8236 case DW_AT_MIPS_tail_loop_begin
:
8237 return "DW_AT_MIPS_tail_loop_begin";
8238 case DW_AT_MIPS_epilog_begin
:
8239 return "DW_AT_MIPS_epilog_begin";
8240 case DW_AT_MIPS_loop_unroll_factor
:
8241 return "DW_AT_MIPS_loop_unroll_factor";
8242 case DW_AT_MIPS_software_pipeline_depth
:
8243 return "DW_AT_MIPS_software_pipeline_depth";
8244 case DW_AT_MIPS_linkage_name
:
8245 return "DW_AT_MIPS_linkage_name";
8246 case DW_AT_MIPS_stride
:
8247 return "DW_AT_MIPS_stride";
8248 case DW_AT_MIPS_abstract_name
:
8249 return "DW_AT_MIPS_abstract_name";
8250 case DW_AT_MIPS_clone_origin
:
8251 return "DW_AT_MIPS_clone_origin";
8252 case DW_AT_MIPS_has_inlines
:
8253 return "DW_AT_MIPS_has_inlines";
8255 /* HP extensions. */
8256 case DW_AT_HP_block_index
:
8257 return "DW_AT_HP_block_index";
8258 case DW_AT_HP_unmodifiable
:
8259 return "DW_AT_HP_unmodifiable";
8260 case DW_AT_HP_actuals_stmt_list
:
8261 return "DW_AT_HP_actuals_stmt_list";
8262 case DW_AT_HP_proc_per_section
:
8263 return "DW_AT_HP_proc_per_section";
8264 case DW_AT_HP_raw_data_ptr
:
8265 return "DW_AT_HP_raw_data_ptr";
8266 case DW_AT_HP_pass_by_reference
:
8267 return "DW_AT_HP_pass_by_reference";
8268 case DW_AT_HP_opt_level
:
8269 return "DW_AT_HP_opt_level";
8270 case DW_AT_HP_prof_version_id
:
8271 return "DW_AT_HP_prof_version_id";
8272 case DW_AT_HP_opt_flags
:
8273 return "DW_AT_HP_opt_flags";
8274 case DW_AT_HP_cold_region_low_pc
:
8275 return "DW_AT_HP_cold_region_low_pc";
8276 case DW_AT_HP_cold_region_high_pc
:
8277 return "DW_AT_HP_cold_region_high_pc";
8278 case DW_AT_HP_all_variables_modifiable
:
8279 return "DW_AT_HP_all_variables_modifiable";
8280 case DW_AT_HP_linkage_name
:
8281 return "DW_AT_HP_linkage_name";
8282 case DW_AT_HP_prof_flags
:
8283 return "DW_AT_HP_prof_flags";
8284 /* GNU extensions. */
8285 case DW_AT_sf_names
:
8286 return "DW_AT_sf_names";
8287 case DW_AT_src_info
:
8288 return "DW_AT_src_info";
8289 case DW_AT_mac_info
:
8290 return "DW_AT_mac_info";
8291 case DW_AT_src_coords
:
8292 return "DW_AT_src_coords";
8293 case DW_AT_body_begin
:
8294 return "DW_AT_body_begin";
8295 case DW_AT_body_end
:
8296 return "DW_AT_body_end";
8297 case DW_AT_GNU_vector
:
8298 return "DW_AT_GNU_vector";
8299 /* VMS extensions. */
8300 case DW_AT_VMS_rtnbeg_pd_address
:
8301 return "DW_AT_VMS_rtnbeg_pd_address";
8302 /* UPC extension. */
8303 case DW_AT_upc_threads_scaled
:
8304 return "DW_AT_upc_threads_scaled";
8305 /* PGI (STMicroelectronics) extensions. */
8306 case DW_AT_PGI_lbase
:
8307 return "DW_AT_PGI_lbase";
8308 case DW_AT_PGI_soffset
:
8309 return "DW_AT_PGI_soffset";
8310 case DW_AT_PGI_lstride
:
8311 return "DW_AT_PGI_lstride";
8313 return "DW_AT_<unknown>";
8317 /* Convert a DWARF value form code into its string name. */
8320 dwarf_form_name (unsigned form
)
8325 return "DW_FORM_addr";
8326 case DW_FORM_block2
:
8327 return "DW_FORM_block2";
8328 case DW_FORM_block4
:
8329 return "DW_FORM_block4";
8331 return "DW_FORM_data2";
8333 return "DW_FORM_data4";
8335 return "DW_FORM_data8";
8336 case DW_FORM_string
:
8337 return "DW_FORM_string";
8339 return "DW_FORM_block";
8340 case DW_FORM_block1
:
8341 return "DW_FORM_block1";
8343 return "DW_FORM_data1";
8345 return "DW_FORM_flag";
8347 return "DW_FORM_sdata";
8349 return "DW_FORM_strp";
8351 return "DW_FORM_udata";
8352 case DW_FORM_ref_addr
:
8353 return "DW_FORM_ref_addr";
8355 return "DW_FORM_ref1";
8357 return "DW_FORM_ref2";
8359 return "DW_FORM_ref4";
8361 return "DW_FORM_ref8";
8362 case DW_FORM_ref_udata
:
8363 return "DW_FORM_ref_udata";
8364 case DW_FORM_indirect
:
8365 return "DW_FORM_indirect";
8367 return "DW_FORM_<unknown>";
8371 /* Convert a DWARF stack opcode into its string name. */
8374 dwarf_stack_op_name (unsigned op
)
8379 return "DW_OP_addr";
8381 return "DW_OP_deref";
8383 return "DW_OP_const1u";
8385 return "DW_OP_const1s";
8387 return "DW_OP_const2u";
8389 return "DW_OP_const2s";
8391 return "DW_OP_const4u";
8393 return "DW_OP_const4s";
8395 return "DW_OP_const8u";
8397 return "DW_OP_const8s";
8399 return "DW_OP_constu";
8401 return "DW_OP_consts";
8405 return "DW_OP_drop";
8407 return "DW_OP_over";
8409 return "DW_OP_pick";
8411 return "DW_OP_swap";
8415 return "DW_OP_xderef";
8423 return "DW_OP_minus";
8435 return "DW_OP_plus";
8436 case DW_OP_plus_uconst
:
8437 return "DW_OP_plus_uconst";
8443 return "DW_OP_shra";
8461 return "DW_OP_skip";
8463 return "DW_OP_lit0";
8465 return "DW_OP_lit1";
8467 return "DW_OP_lit2";
8469 return "DW_OP_lit3";
8471 return "DW_OP_lit4";
8473 return "DW_OP_lit5";
8475 return "DW_OP_lit6";
8477 return "DW_OP_lit7";
8479 return "DW_OP_lit8";
8481 return "DW_OP_lit9";
8483 return "DW_OP_lit10";
8485 return "DW_OP_lit11";
8487 return "DW_OP_lit12";
8489 return "DW_OP_lit13";
8491 return "DW_OP_lit14";
8493 return "DW_OP_lit15";
8495 return "DW_OP_lit16";
8497 return "DW_OP_lit17";
8499 return "DW_OP_lit18";
8501 return "DW_OP_lit19";
8503 return "DW_OP_lit20";
8505 return "DW_OP_lit21";
8507 return "DW_OP_lit22";
8509 return "DW_OP_lit23";
8511 return "DW_OP_lit24";
8513 return "DW_OP_lit25";
8515 return "DW_OP_lit26";
8517 return "DW_OP_lit27";
8519 return "DW_OP_lit28";
8521 return "DW_OP_lit29";
8523 return "DW_OP_lit30";
8525 return "DW_OP_lit31";
8527 return "DW_OP_reg0";
8529 return "DW_OP_reg1";
8531 return "DW_OP_reg2";
8533 return "DW_OP_reg3";
8535 return "DW_OP_reg4";
8537 return "DW_OP_reg5";
8539 return "DW_OP_reg6";
8541 return "DW_OP_reg7";
8543 return "DW_OP_reg8";
8545 return "DW_OP_reg9";
8547 return "DW_OP_reg10";
8549 return "DW_OP_reg11";
8551 return "DW_OP_reg12";
8553 return "DW_OP_reg13";
8555 return "DW_OP_reg14";
8557 return "DW_OP_reg15";
8559 return "DW_OP_reg16";
8561 return "DW_OP_reg17";
8563 return "DW_OP_reg18";
8565 return "DW_OP_reg19";
8567 return "DW_OP_reg20";
8569 return "DW_OP_reg21";
8571 return "DW_OP_reg22";
8573 return "DW_OP_reg23";
8575 return "DW_OP_reg24";
8577 return "DW_OP_reg25";
8579 return "DW_OP_reg26";
8581 return "DW_OP_reg27";
8583 return "DW_OP_reg28";
8585 return "DW_OP_reg29";
8587 return "DW_OP_reg30";
8589 return "DW_OP_reg31";
8591 return "DW_OP_breg0";
8593 return "DW_OP_breg1";
8595 return "DW_OP_breg2";
8597 return "DW_OP_breg3";
8599 return "DW_OP_breg4";
8601 return "DW_OP_breg5";
8603 return "DW_OP_breg6";
8605 return "DW_OP_breg7";
8607 return "DW_OP_breg8";
8609 return "DW_OP_breg9";
8611 return "DW_OP_breg10";
8613 return "DW_OP_breg11";
8615 return "DW_OP_breg12";
8617 return "DW_OP_breg13";
8619 return "DW_OP_breg14";
8621 return "DW_OP_breg15";
8623 return "DW_OP_breg16";
8625 return "DW_OP_breg17";
8627 return "DW_OP_breg18";
8629 return "DW_OP_breg19";
8631 return "DW_OP_breg20";
8633 return "DW_OP_breg21";
8635 return "DW_OP_breg22";
8637 return "DW_OP_breg23";
8639 return "DW_OP_breg24";
8641 return "DW_OP_breg25";
8643 return "DW_OP_breg26";
8645 return "DW_OP_breg27";
8647 return "DW_OP_breg28";
8649 return "DW_OP_breg29";
8651 return "DW_OP_breg30";
8653 return "DW_OP_breg31";
8655 return "DW_OP_regx";
8657 return "DW_OP_fbreg";
8659 return "DW_OP_bregx";
8661 return "DW_OP_piece";
8662 case DW_OP_deref_size
:
8663 return "DW_OP_deref_size";
8664 case DW_OP_xderef_size
:
8665 return "DW_OP_xderef_size";
8668 /* DWARF 3 extensions. */
8669 case DW_OP_push_object_address
:
8670 return "DW_OP_push_object_address";
8672 return "DW_OP_call2";
8674 return "DW_OP_call4";
8675 case DW_OP_call_ref
:
8676 return "DW_OP_call_ref";
8677 /* GNU extensions. */
8678 case DW_OP_form_tls_address
:
8679 return "DW_OP_form_tls_address";
8680 case DW_OP_call_frame_cfa
:
8681 return "DW_OP_call_frame_cfa";
8682 case DW_OP_bit_piece
:
8683 return "DW_OP_bit_piece";
8684 case DW_OP_GNU_push_tls_address
:
8685 return "DW_OP_GNU_push_tls_address";
8686 case DW_OP_GNU_uninit
:
8687 return "DW_OP_GNU_uninit";
8688 /* HP extensions. */
8689 case DW_OP_HP_is_value
:
8690 return "DW_OP_HP_is_value";
8691 case DW_OP_HP_fltconst4
:
8692 return "DW_OP_HP_fltconst4";
8693 case DW_OP_HP_fltconst8
:
8694 return "DW_OP_HP_fltconst8";
8695 case DW_OP_HP_mod_range
:
8696 return "DW_OP_HP_mod_range";
8697 case DW_OP_HP_unmod_range
:
8698 return "DW_OP_HP_unmod_range";
8700 return "DW_OP_HP_tls";
8702 return "OP_<unknown>";
8707 dwarf_bool_name (unsigned mybool
)
8715 /* Convert a DWARF type code into its string name. */
8718 dwarf_type_encoding_name (unsigned enc
)
8723 return "DW_ATE_void";
8724 case DW_ATE_address
:
8725 return "DW_ATE_address";
8726 case DW_ATE_boolean
:
8727 return "DW_ATE_boolean";
8728 case DW_ATE_complex_float
:
8729 return "DW_ATE_complex_float";
8731 return "DW_ATE_float";
8733 return "DW_ATE_signed";
8734 case DW_ATE_signed_char
:
8735 return "DW_ATE_signed_char";
8736 case DW_ATE_unsigned
:
8737 return "DW_ATE_unsigned";
8738 case DW_ATE_unsigned_char
:
8739 return "DW_ATE_unsigned_char";
8741 case DW_ATE_imaginary_float
:
8742 return "DW_ATE_imaginary_float";
8743 case DW_ATE_packed_decimal
:
8744 return "DW_ATE_packed_decimal";
8745 case DW_ATE_numeric_string
:
8746 return "DW_ATE_numeric_string";
8748 return "DW_ATE_edited";
8749 case DW_ATE_signed_fixed
:
8750 return "DW_ATE_signed_fixed";
8751 case DW_ATE_unsigned_fixed
:
8752 return "DW_ATE_unsigned_fixed";
8753 case DW_ATE_decimal_float
:
8754 return "DW_ATE_decimal_float";
8755 /* HP extensions. */
8756 case DW_ATE_HP_float80
:
8757 return "DW_ATE_HP_float80";
8758 case DW_ATE_HP_complex_float80
:
8759 return "DW_ATE_HP_complex_float80";
8760 case DW_ATE_HP_float128
:
8761 return "DW_ATE_HP_float128";
8762 case DW_ATE_HP_complex_float128
:
8763 return "DW_ATE_HP_complex_float128";
8764 case DW_ATE_HP_floathpintel
:
8765 return "DW_ATE_HP_floathpintel";
8766 case DW_ATE_HP_imaginary_float80
:
8767 return "DW_ATE_HP_imaginary_float80";
8768 case DW_ATE_HP_imaginary_float128
:
8769 return "DW_ATE_HP_imaginary_float128";
8771 return "DW_ATE_<unknown>";
8775 /* Convert a DWARF call frame info operation to its string name. */
8779 dwarf_cfi_name (unsigned cfi_opc
)
8783 case DW_CFA_advance_loc
:
8784 return "DW_CFA_advance_loc";
8786 return "DW_CFA_offset";
8787 case DW_CFA_restore
:
8788 return "DW_CFA_restore";
8790 return "DW_CFA_nop";
8791 case DW_CFA_set_loc
:
8792 return "DW_CFA_set_loc";
8793 case DW_CFA_advance_loc1
:
8794 return "DW_CFA_advance_loc1";
8795 case DW_CFA_advance_loc2
:
8796 return "DW_CFA_advance_loc2";
8797 case DW_CFA_advance_loc4
:
8798 return "DW_CFA_advance_loc4";
8799 case DW_CFA_offset_extended
:
8800 return "DW_CFA_offset_extended";
8801 case DW_CFA_restore_extended
:
8802 return "DW_CFA_restore_extended";
8803 case DW_CFA_undefined
:
8804 return "DW_CFA_undefined";
8805 case DW_CFA_same_value
:
8806 return "DW_CFA_same_value";
8807 case DW_CFA_register
:
8808 return "DW_CFA_register";
8809 case DW_CFA_remember_state
:
8810 return "DW_CFA_remember_state";
8811 case DW_CFA_restore_state
:
8812 return "DW_CFA_restore_state";
8813 case DW_CFA_def_cfa
:
8814 return "DW_CFA_def_cfa";
8815 case DW_CFA_def_cfa_register
:
8816 return "DW_CFA_def_cfa_register";
8817 case DW_CFA_def_cfa_offset
:
8818 return "DW_CFA_def_cfa_offset";
8820 case DW_CFA_def_cfa_expression
:
8821 return "DW_CFA_def_cfa_expression";
8822 case DW_CFA_expression
:
8823 return "DW_CFA_expression";
8824 case DW_CFA_offset_extended_sf
:
8825 return "DW_CFA_offset_extended_sf";
8826 case DW_CFA_def_cfa_sf
:
8827 return "DW_CFA_def_cfa_sf";
8828 case DW_CFA_def_cfa_offset_sf
:
8829 return "DW_CFA_def_cfa_offset_sf";
8830 case DW_CFA_val_offset
:
8831 return "DW_CFA_val_offset";
8832 case DW_CFA_val_offset_sf
:
8833 return "DW_CFA_val_offset_sf";
8834 case DW_CFA_val_expression
:
8835 return "DW_CFA_val_expression";
8836 /* SGI/MIPS specific. */
8837 case DW_CFA_MIPS_advance_loc8
:
8838 return "DW_CFA_MIPS_advance_loc8";
8839 /* GNU extensions. */
8840 case DW_CFA_GNU_window_save
:
8841 return "DW_CFA_GNU_window_save";
8842 case DW_CFA_GNU_args_size
:
8843 return "DW_CFA_GNU_args_size";
8844 case DW_CFA_GNU_negative_offset_extended
:
8845 return "DW_CFA_GNU_negative_offset_extended";
8847 return "DW_CFA_<unknown>";
8853 dump_die (struct die_info
*die
)
8857 fprintf_unfiltered (gdb_stderr
, "Die: %s (abbrev = %d, offset = %d)\n",
8858 dwarf_tag_name (die
->tag
), die
->abbrev
, die
->offset
);
8859 fprintf_unfiltered (gdb_stderr
, "\thas children: %s\n",
8860 dwarf_bool_name (die
->child
!= NULL
));
8862 fprintf_unfiltered (gdb_stderr
, "\tattributes:\n");
8863 for (i
= 0; i
< die
->num_attrs
; ++i
)
8865 fprintf_unfiltered (gdb_stderr
, "\t\t%s (%s) ",
8866 dwarf_attr_name (die
->attrs
[i
].name
),
8867 dwarf_form_name (die
->attrs
[i
].form
));
8868 switch (die
->attrs
[i
].form
)
8870 case DW_FORM_ref_addr
:
8872 fprintf_unfiltered (gdb_stderr
, "address: ");
8873 deprecated_print_address_numeric (DW_ADDR (&die
->attrs
[i
]), 1, gdb_stderr
);
8875 case DW_FORM_block2
:
8876 case DW_FORM_block4
:
8878 case DW_FORM_block1
:
8879 fprintf_unfiltered (gdb_stderr
, "block: size %d", DW_BLOCK (&die
->attrs
[i
])->size
);
8884 fprintf_unfiltered (gdb_stderr
, "constant ref: %ld (adjusted)",
8885 (long) (DW_ADDR (&die
->attrs
[i
])));
8893 fprintf_unfiltered (gdb_stderr
, "constant: %ld", DW_UNSND (&die
->attrs
[i
]));
8895 case DW_FORM_string
:
8897 fprintf_unfiltered (gdb_stderr
, "string: \"%s\"",
8898 DW_STRING (&die
->attrs
[i
])
8899 ? DW_STRING (&die
->attrs
[i
]) : "");
8902 if (DW_UNSND (&die
->attrs
[i
]))
8903 fprintf_unfiltered (gdb_stderr
, "flag: TRUE");
8905 fprintf_unfiltered (gdb_stderr
, "flag: FALSE");
8907 case DW_FORM_indirect
:
8908 /* the reader will have reduced the indirect form to
8909 the "base form" so this form should not occur */
8910 fprintf_unfiltered (gdb_stderr
, "unexpected attribute form: DW_FORM_indirect");
8913 fprintf_unfiltered (gdb_stderr
, "unsupported attribute form: %d.",
8914 die
->attrs
[i
].form
);
8916 fprintf_unfiltered (gdb_stderr
, "\n");
8921 dump_die_list (struct die_info
*die
)
8926 if (die
->child
!= NULL
)
8927 dump_die_list (die
->child
);
8928 if (die
->sibling
!= NULL
)
8929 dump_die_list (die
->sibling
);
8934 store_in_ref_table (unsigned int offset
, struct die_info
*die
,
8935 struct dwarf2_cu
*cu
)
8938 struct die_info
*old
;
8940 h
= (offset
% REF_HASH_SIZE
);
8941 old
= cu
->die_ref_table
[h
];
8942 die
->next_ref
= old
;
8943 cu
->die_ref_table
[h
] = die
;
8947 dwarf2_get_ref_die_offset (struct attribute
*attr
, struct dwarf2_cu
*cu
)
8949 unsigned int result
= 0;
8953 case DW_FORM_ref_addr
:
8958 case DW_FORM_ref_udata
:
8959 result
= DW_ADDR (attr
);
8962 complaint (&symfile_complaints
,
8963 _("unsupported die ref attribute form: '%s'"),
8964 dwarf_form_name (attr
->form
));
8969 /* Return the constant value held by the given attribute. Return -1
8970 if the value held by the attribute is not constant. */
8973 dwarf2_get_attr_constant_value (struct attribute
*attr
, int default_value
)
8975 if (attr
->form
== DW_FORM_sdata
)
8976 return DW_SND (attr
);
8977 else if (attr
->form
== DW_FORM_udata
8978 || attr
->form
== DW_FORM_data1
8979 || attr
->form
== DW_FORM_data2
8980 || attr
->form
== DW_FORM_data4
8981 || attr
->form
== DW_FORM_data8
)
8982 return DW_UNSND (attr
);
8985 complaint (&symfile_complaints
, _("Attribute value is not a constant (%s)"),
8986 dwarf_form_name (attr
->form
));
8987 return default_value
;
8991 static struct die_info
*
8992 follow_die_ref (struct die_info
*src_die
, struct attribute
*attr
,
8993 struct dwarf2_cu
*cu
)
8995 struct die_info
*die
;
8996 unsigned int offset
;
8998 struct die_info temp_die
;
8999 struct dwarf2_cu
*target_cu
;
9001 offset
= dwarf2_get_ref_die_offset (attr
, cu
);
9003 if (DW_ADDR (attr
) < cu
->header
.offset
9004 || DW_ADDR (attr
) >= cu
->header
.offset
+ cu
->header
.length
)
9006 struct dwarf2_per_cu_data
*per_cu
;
9007 per_cu
= dwarf2_find_containing_comp_unit (DW_ADDR (attr
),
9009 target_cu
= per_cu
->cu
;
9014 h
= (offset
% REF_HASH_SIZE
);
9015 die
= target_cu
->die_ref_table
[h
];
9018 if (die
->offset
== offset
)
9020 die
= die
->next_ref
;
9023 error (_("Dwarf Error: Cannot find DIE at 0x%lx referenced from DIE "
9024 "at 0x%lx [in module %s]"),
9025 (long) src_die
->offset
, (long) offset
, cu
->objfile
->name
);
9030 static struct type
*
9031 dwarf2_fundamental_type (struct objfile
*objfile
, int typeid,
9032 struct dwarf2_cu
*cu
)
9034 if (typeid < 0 || typeid >= FT_NUM_MEMBERS
)
9036 error (_("Dwarf Error: internal error - invalid fundamental type id %d [in module %s]"),
9037 typeid, objfile
->name
);
9040 /* Look for this particular type in the fundamental type vector. If
9041 one is not found, create and install one appropriate for the
9042 current language and the current target machine. */
9044 if (cu
->ftypes
[typeid] == NULL
)
9046 cu
->ftypes
[typeid] = cu
->language_defn
->la_fund_type (objfile
, typeid);
9049 return (cu
->ftypes
[typeid]);
9052 /* Decode simple location descriptions.
9053 Given a pointer to a dwarf block that defines a location, compute
9054 the location and return the value.
9056 NOTE drow/2003-11-18: This function is called in two situations
9057 now: for the address of static or global variables (partial symbols
9058 only) and for offsets into structures which are expected to be
9059 (more or less) constant. The partial symbol case should go away,
9060 and only the constant case should remain. That will let this
9061 function complain more accurately. A few special modes are allowed
9062 without complaint for global variables (for instance, global
9063 register values and thread-local values).
9065 A location description containing no operations indicates that the
9066 object is optimized out. The return value is 0 for that case.
9067 FIXME drow/2003-11-16: No callers check for this case any more; soon all
9068 callers will only want a very basic result and this can become a
9071 Note that stack[0] is unused except as a default error return.
9072 Note that stack overflow is not yet handled. */
9075 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
9077 struct objfile
*objfile
= cu
->objfile
;
9078 struct comp_unit_head
*cu_header
= &cu
->header
;
9080 int size
= blk
->size
;
9081 gdb_byte
*data
= blk
->data
;
9082 CORE_ADDR stack
[64];
9084 unsigned int bytes_read
, unsnd
;
9128 stack
[++stacki
] = op
- DW_OP_lit0
;
9163 stack
[++stacki
] = op
- DW_OP_reg0
;
9165 dwarf2_complex_location_expr_complaint ();
9169 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9171 stack
[++stacki
] = unsnd
;
9173 dwarf2_complex_location_expr_complaint ();
9177 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
9183 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
9188 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
9193 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
9198 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
9203 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
9208 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
9213 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
9219 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
9224 stack
[stacki
+ 1] = stack
[stacki
];
9229 stack
[stacki
- 1] += stack
[stacki
];
9233 case DW_OP_plus_uconst
:
9234 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
9239 stack
[stacki
- 1] -= stack
[stacki
];
9244 /* If we're not the last op, then we definitely can't encode
9245 this using GDB's address_class enum. This is valid for partial
9246 global symbols, although the variable's address will be bogus
9249 dwarf2_complex_location_expr_complaint ();
9252 case DW_OP_GNU_push_tls_address
:
9253 /* The top of the stack has the offset from the beginning
9254 of the thread control block at which the variable is located. */
9255 /* Nothing should follow this operator, so the top of stack would
9257 /* This is valid for partial global symbols, but the variable's
9258 address will be bogus in the psymtab. */
9260 dwarf2_complex_location_expr_complaint ();
9263 case DW_OP_GNU_uninit
:
9267 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
9268 dwarf_stack_op_name (op
));
9269 return (stack
[stacki
]);
9272 return (stack
[stacki
]);
9275 /* memory allocation interface */
9277 static struct dwarf_block
*
9278 dwarf_alloc_block (struct dwarf2_cu
*cu
)
9280 struct dwarf_block
*blk
;
9282 blk
= (struct dwarf_block
*)
9283 obstack_alloc (&cu
->comp_unit_obstack
, sizeof (struct dwarf_block
));
9287 static struct abbrev_info
*
9288 dwarf_alloc_abbrev (struct dwarf2_cu
*cu
)
9290 struct abbrev_info
*abbrev
;
9292 abbrev
= (struct abbrev_info
*)
9293 obstack_alloc (&cu
->abbrev_obstack
, sizeof (struct abbrev_info
));
9294 memset (abbrev
, 0, sizeof (struct abbrev_info
));
9298 static struct die_info
*
9299 dwarf_alloc_die (void)
9301 struct die_info
*die
;
9303 die
= (struct die_info
*) xmalloc (sizeof (struct die_info
));
9304 memset (die
, 0, sizeof (struct die_info
));
9309 /* Macro support. */
9312 /* Return the full name of file number I in *LH's file name table.
9313 Use COMP_DIR as the name of the current directory of the
9314 compilation. The result is allocated using xmalloc; the caller is
9315 responsible for freeing it. */
9317 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
9319 /* Is the file number a valid index into the line header's file name
9320 table? Remember that file numbers start with one, not zero. */
9321 if (1 <= file
&& file
<= lh
->num_file_names
)
9323 struct file_entry
*fe
= &lh
->file_names
[file
- 1];
9325 if (IS_ABSOLUTE_PATH (fe
->name
))
9326 return xstrdup (fe
->name
);
9334 dir
= lh
->include_dirs
[fe
->dir_index
- 1];
9340 dir_len
= strlen (dir
);
9341 full_name
= xmalloc (dir_len
+ 1 + strlen (fe
->name
) + 1);
9342 strcpy (full_name
, dir
);
9343 full_name
[dir_len
] = '/';
9344 strcpy (full_name
+ dir_len
+ 1, fe
->name
);
9348 return xstrdup (fe
->name
);
9353 /* The compiler produced a bogus file number. We can at least
9354 record the macro definitions made in the file, even if we
9355 won't be able to find the file by name. */
9357 sprintf (fake_name
, "<bad macro file number %d>", file
);
9359 complaint (&symfile_complaints
,
9360 _("bad file number in macro information (%d)"),
9363 return xstrdup (fake_name
);
9368 static struct macro_source_file
*
9369 macro_start_file (int file
, int line
,
9370 struct macro_source_file
*current_file
,
9371 const char *comp_dir
,
9372 struct line_header
*lh
, struct objfile
*objfile
)
9374 /* The full name of this source file. */
9375 char *full_name
= file_full_name (file
, lh
, comp_dir
);
9377 /* We don't create a macro table for this compilation unit
9378 at all until we actually get a filename. */
9379 if (! pending_macros
)
9380 pending_macros
= new_macro_table (&objfile
->objfile_obstack
,
9381 objfile
->macro_cache
);
9384 /* If we have no current file, then this must be the start_file
9385 directive for the compilation unit's main source file. */
9386 current_file
= macro_set_main (pending_macros
, full_name
);
9388 current_file
= macro_include (current_file
, line
, full_name
);
9392 return current_file
;
9396 /* Copy the LEN characters at BUF to a xmalloc'ed block of memory,
9397 followed by a null byte. */
9399 copy_string (const char *buf
, int len
)
9401 char *s
= xmalloc (len
+ 1);
9402 memcpy (s
, buf
, len
);
9410 consume_improper_spaces (const char *p
, const char *body
)
9414 complaint (&symfile_complaints
,
9415 _("macro definition contains spaces in formal argument list:\n`%s'"),
9427 parse_macro_definition (struct macro_source_file
*file
, int line
,
9432 /* The body string takes one of two forms. For object-like macro
9433 definitions, it should be:
9435 <macro name> " " <definition>
9437 For function-like macro definitions, it should be:
9439 <macro name> "() " <definition>
9441 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
9443 Spaces may appear only where explicitly indicated, and in the
9446 The Dwarf 2 spec says that an object-like macro's name is always
9447 followed by a space, but versions of GCC around March 2002 omit
9448 the space when the macro's definition is the empty string.
9450 The Dwarf 2 spec says that there should be no spaces between the
9451 formal arguments in a function-like macro's formal argument list,
9452 but versions of GCC around March 2002 include spaces after the
9456 /* Find the extent of the macro name. The macro name is terminated
9457 by either a space or null character (for an object-like macro) or
9458 an opening paren (for a function-like macro). */
9459 for (p
= body
; *p
; p
++)
9460 if (*p
== ' ' || *p
== '(')
9463 if (*p
== ' ' || *p
== '\0')
9465 /* It's an object-like macro. */
9466 int name_len
= p
- body
;
9467 char *name
= copy_string (body
, name_len
);
9468 const char *replacement
;
9471 replacement
= body
+ name_len
+ 1;
9474 dwarf2_macro_malformed_definition_complaint (body
);
9475 replacement
= body
+ name_len
;
9478 macro_define_object (file
, line
, name
, replacement
);
9484 /* It's a function-like macro. */
9485 char *name
= copy_string (body
, p
- body
);
9488 char **argv
= xmalloc (argv_size
* sizeof (*argv
));
9492 p
= consume_improper_spaces (p
, body
);
9494 /* Parse the formal argument list. */
9495 while (*p
&& *p
!= ')')
9497 /* Find the extent of the current argument name. */
9498 const char *arg_start
= p
;
9500 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
9503 if (! *p
|| p
== arg_start
)
9504 dwarf2_macro_malformed_definition_complaint (body
);
9507 /* Make sure argv has room for the new argument. */
9508 if (argc
>= argv_size
)
9511 argv
= xrealloc (argv
, argv_size
* sizeof (*argv
));
9514 argv
[argc
++] = copy_string (arg_start
, p
- arg_start
);
9517 p
= consume_improper_spaces (p
, body
);
9519 /* Consume the comma, if present. */
9524 p
= consume_improper_spaces (p
, body
);
9533 /* Perfectly formed definition, no complaints. */
9534 macro_define_function (file
, line
, name
,
9535 argc
, (const char **) argv
,
9537 else if (*p
== '\0')
9539 /* Complain, but do define it. */
9540 dwarf2_macro_malformed_definition_complaint (body
);
9541 macro_define_function (file
, line
, name
,
9542 argc
, (const char **) argv
,
9546 /* Just complain. */
9547 dwarf2_macro_malformed_definition_complaint (body
);
9550 /* Just complain. */
9551 dwarf2_macro_malformed_definition_complaint (body
);
9557 for (i
= 0; i
< argc
; i
++)
9563 dwarf2_macro_malformed_definition_complaint (body
);
9568 dwarf_decode_macros (struct line_header
*lh
, unsigned int offset
,
9569 char *comp_dir
, bfd
*abfd
,
9570 struct dwarf2_cu
*cu
)
9572 gdb_byte
*mac_ptr
, *mac_end
;
9573 struct macro_source_file
*current_file
= 0;
9575 if (dwarf2_per_objfile
->macinfo_buffer
== NULL
)
9577 complaint (&symfile_complaints
, _("missing .debug_macinfo section"));
9581 mac_ptr
= dwarf2_per_objfile
->macinfo_buffer
+ offset
;
9582 mac_end
= dwarf2_per_objfile
->macinfo_buffer
9583 + dwarf2_per_objfile
->macinfo_size
;
9587 enum dwarf_macinfo_record_type macinfo_type
;
9589 /* Do we at least have room for a macinfo type byte? */
9590 if (mac_ptr
>= mac_end
)
9592 dwarf2_macros_too_long_complaint ();
9596 macinfo_type
= read_1_byte (abfd
, mac_ptr
);
9599 switch (macinfo_type
)
9601 /* A zero macinfo type indicates the end of the macro
9606 case DW_MACINFO_define
:
9607 case DW_MACINFO_undef
:
9609 unsigned int bytes_read
;
9613 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9614 mac_ptr
+= bytes_read
;
9615 body
= read_string (abfd
, mac_ptr
, &bytes_read
);
9616 mac_ptr
+= bytes_read
;
9619 complaint (&symfile_complaints
,
9620 _("debug info gives macro %s outside of any file: %s"),
9622 DW_MACINFO_define
? "definition" : macinfo_type
==
9623 DW_MACINFO_undef
? "undefinition" :
9624 "something-or-other", body
);
9627 if (macinfo_type
== DW_MACINFO_define
)
9628 parse_macro_definition (current_file
, line
, body
);
9629 else if (macinfo_type
== DW_MACINFO_undef
)
9630 macro_undef (current_file
, line
, body
);
9635 case DW_MACINFO_start_file
:
9637 unsigned int bytes_read
;
9640 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9641 mac_ptr
+= bytes_read
;
9642 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9643 mac_ptr
+= bytes_read
;
9645 current_file
= macro_start_file (file
, line
,
9646 current_file
, comp_dir
,
9651 case DW_MACINFO_end_file
:
9653 complaint (&symfile_complaints
,
9654 _("macro debug info has an unmatched `close_file' directive"));
9657 current_file
= current_file
->included_by
;
9660 enum dwarf_macinfo_record_type next_type
;
9662 /* GCC circa March 2002 doesn't produce the zero
9663 type byte marking the end of the compilation
9664 unit. Complain if it's not there, but exit no
9667 /* Do we at least have room for a macinfo type byte? */
9668 if (mac_ptr
>= mac_end
)
9670 dwarf2_macros_too_long_complaint ();
9674 /* We don't increment mac_ptr here, so this is just
9676 next_type
= read_1_byte (abfd
, mac_ptr
);
9678 complaint (&symfile_complaints
,
9679 _("no terminating 0-type entry for macros in `.debug_macinfo' section"));
9686 case DW_MACINFO_vendor_ext
:
9688 unsigned int bytes_read
;
9692 constant
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
9693 mac_ptr
+= bytes_read
;
9694 string
= read_string (abfd
, mac_ptr
, &bytes_read
);
9695 mac_ptr
+= bytes_read
;
9697 /* We don't recognize any vendor extensions. */
9704 /* Check if the attribute's form is a DW_FORM_block*
9705 if so return true else false. */
9707 attr_form_is_block (struct attribute
*attr
)
9709 return (attr
== NULL
? 0 :
9710 attr
->form
== DW_FORM_block1
9711 || attr
->form
== DW_FORM_block2
9712 || attr
->form
== DW_FORM_block4
9713 || attr
->form
== DW_FORM_block
);
9717 dwarf2_symbol_mark_computed (struct attribute
*attr
, struct symbol
*sym
,
9718 struct dwarf2_cu
*cu
)
9720 struct objfile
*objfile
= cu
->objfile
;
9722 /* Save the master objfile, so that we can report and look up the
9723 correct file containing this variable. */
9724 if (objfile
->separate_debug_objfile_backlink
)
9725 objfile
= objfile
->separate_debug_objfile_backlink
;
9727 if ((attr
->form
== DW_FORM_data4
|| attr
->form
== DW_FORM_data8
)
9728 /* ".debug_loc" may not exist at all, or the offset may be outside
9729 the section. If so, fall through to the complaint in the
9731 && DW_UNSND (attr
) < dwarf2_per_objfile
->loc_size
)
9733 struct dwarf2_loclist_baton
*baton
;
9735 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9736 sizeof (struct dwarf2_loclist_baton
));
9737 baton
->objfile
= objfile
;
9739 /* We don't know how long the location list is, but make sure we
9740 don't run off the edge of the section. */
9741 baton
->size
= dwarf2_per_objfile
->loc_size
- DW_UNSND (attr
);
9742 baton
->data
= dwarf2_per_objfile
->loc_buffer
+ DW_UNSND (attr
);
9743 baton
->base_address
= cu
->header
.base_address
;
9744 if (cu
->header
.base_known
== 0)
9745 complaint (&symfile_complaints
,
9746 _("Location list used without specifying the CU base address."));
9748 SYMBOL_OPS (sym
) = &dwarf2_loclist_funcs
;
9749 SYMBOL_LOCATION_BATON (sym
) = baton
;
9753 struct dwarf2_locexpr_baton
*baton
;
9755 baton
= obstack_alloc (&cu
->objfile
->objfile_obstack
,
9756 sizeof (struct dwarf2_locexpr_baton
));
9757 baton
->objfile
= objfile
;
9759 if (attr_form_is_block (attr
))
9761 /* Note that we're just copying the block's data pointer
9762 here, not the actual data. We're still pointing into the
9763 info_buffer for SYM's objfile; right now we never release
9764 that buffer, but when we do clean up properly this may
9766 baton
->size
= DW_BLOCK (attr
)->size
;
9767 baton
->data
= DW_BLOCK (attr
)->data
;
9771 dwarf2_invalid_attrib_class_complaint ("location description",
9772 SYMBOL_NATURAL_NAME (sym
));
9777 SYMBOL_OPS (sym
) = &dwarf2_locexpr_funcs
;
9778 SYMBOL_LOCATION_BATON (sym
) = baton
;
9782 /* Locate the compilation unit from CU's objfile which contains the
9783 DIE at OFFSET. Raises an error on failure. */
9785 static struct dwarf2_per_cu_data
*
9786 dwarf2_find_containing_comp_unit (unsigned long offset
,
9787 struct objfile
*objfile
)
9789 struct dwarf2_per_cu_data
*this_cu
;
9793 high
= dwarf2_per_objfile
->n_comp_units
- 1;
9796 int mid
= low
+ (high
- low
) / 2;
9797 if (dwarf2_per_objfile
->all_comp_units
[mid
]->offset
>= offset
)
9802 gdb_assert (low
== high
);
9803 if (dwarf2_per_objfile
->all_comp_units
[low
]->offset
> offset
)
9806 error (_("Dwarf Error: could not find partial DIE containing "
9807 "offset 0x%lx [in module %s]"),
9808 (long) offset
, bfd_get_filename (objfile
->obfd
));
9810 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->offset
<= offset
);
9811 return dwarf2_per_objfile
->all_comp_units
[low
-1];
9815 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
9816 if (low
== dwarf2_per_objfile
->n_comp_units
- 1
9817 && offset
>= this_cu
->offset
+ this_cu
->length
)
9818 error (_("invalid dwarf2 offset %ld"), offset
);
9819 gdb_assert (offset
< this_cu
->offset
+ this_cu
->length
);
9824 /* Locate the compilation unit from OBJFILE which is located at exactly
9825 OFFSET. Raises an error on failure. */
9827 static struct dwarf2_per_cu_data
*
9828 dwarf2_find_comp_unit (unsigned long offset
, struct objfile
*objfile
)
9830 struct dwarf2_per_cu_data
*this_cu
;
9831 this_cu
= dwarf2_find_containing_comp_unit (offset
, objfile
);
9832 if (this_cu
->offset
!= offset
)
9833 error (_("no compilation unit with offset %ld."), offset
);
9837 /* Release one cached compilation unit, CU. We unlink it from the tree
9838 of compilation units, but we don't remove it from the read_in_chain;
9839 the caller is responsible for that. */
9842 free_one_comp_unit (void *data
)
9844 struct dwarf2_cu
*cu
= data
;
9846 if (cu
->per_cu
!= NULL
)
9847 cu
->per_cu
->cu
= NULL
;
9850 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9852 free_die_list (cu
->dies
);
9857 /* This cleanup function is passed the address of a dwarf2_cu on the stack
9858 when we're finished with it. We can't free the pointer itself, but be
9859 sure to unlink it from the cache. Also release any associated storage
9860 and perform cache maintenance.
9862 Only used during partial symbol parsing. */
9865 free_stack_comp_unit (void *data
)
9867 struct dwarf2_cu
*cu
= data
;
9869 obstack_free (&cu
->comp_unit_obstack
, NULL
);
9870 cu
->partial_dies
= NULL
;
9872 if (cu
->per_cu
!= NULL
)
9874 /* This compilation unit is on the stack in our caller, so we
9875 should not xfree it. Just unlink it. */
9876 cu
->per_cu
->cu
= NULL
;
9879 /* If we had a per-cu pointer, then we may have other compilation
9880 units loaded, so age them now. */
9881 age_cached_comp_units ();
9885 /* Free all cached compilation units. */
9888 free_cached_comp_units (void *data
)
9890 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9892 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9893 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9894 while (per_cu
!= NULL
)
9896 struct dwarf2_per_cu_data
*next_cu
;
9898 next_cu
= per_cu
->cu
->read_in_chain
;
9900 free_one_comp_unit (per_cu
->cu
);
9901 *last_chain
= next_cu
;
9907 /* Increase the age counter on each cached compilation unit, and free
9908 any that are too old. */
9911 age_cached_comp_units (void)
9913 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9915 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
9916 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9917 while (per_cu
!= NULL
)
9919 per_cu
->cu
->last_used
++;
9920 if (per_cu
->cu
->last_used
<= dwarf2_max_cache_age
)
9921 dwarf2_mark (per_cu
->cu
);
9922 per_cu
= per_cu
->cu
->read_in_chain
;
9925 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9926 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9927 while (per_cu
!= NULL
)
9929 struct dwarf2_per_cu_data
*next_cu
;
9931 next_cu
= per_cu
->cu
->read_in_chain
;
9933 if (!per_cu
->cu
->mark
)
9935 free_one_comp_unit (per_cu
->cu
);
9936 *last_chain
= next_cu
;
9939 last_chain
= &per_cu
->cu
->read_in_chain
;
9945 /* Remove a single compilation unit from the cache. */
9948 free_one_cached_comp_unit (void *target_cu
)
9950 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
9952 per_cu
= dwarf2_per_objfile
->read_in_chain
;
9953 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
9954 while (per_cu
!= NULL
)
9956 struct dwarf2_per_cu_data
*next_cu
;
9958 next_cu
= per_cu
->cu
->read_in_chain
;
9960 if (per_cu
->cu
== target_cu
)
9962 free_one_comp_unit (per_cu
->cu
);
9963 *last_chain
= next_cu
;
9967 last_chain
= &per_cu
->cu
->read_in_chain
;
9973 /* Release all extra memory associated with OBJFILE. */
9976 dwarf2_free_objfile (struct objfile
*objfile
)
9978 dwarf2_per_objfile
= objfile_data (objfile
, dwarf2_objfile_data_key
);
9980 if (dwarf2_per_objfile
== NULL
)
9983 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
9984 free_cached_comp_units (NULL
);
9986 /* Everything else should be on the objfile obstack. */
9989 /* A pair of DIE offset and GDB type pointer. We store these
9990 in a hash table separate from the DIEs, and preserve them
9991 when the DIEs are flushed out of cache. */
9993 struct dwarf2_offset_and_type
9995 unsigned int offset
;
9999 /* Hash function for a dwarf2_offset_and_type. */
10002 offset_and_type_hash (const void *item
)
10004 const struct dwarf2_offset_and_type
*ofs
= item
;
10005 return ofs
->offset
;
10008 /* Equality function for a dwarf2_offset_and_type. */
10011 offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
10013 const struct dwarf2_offset_and_type
*ofs_lhs
= item_lhs
;
10014 const struct dwarf2_offset_and_type
*ofs_rhs
= item_rhs
;
10015 return ofs_lhs
->offset
== ofs_rhs
->offset
;
10018 /* Set the type associated with DIE to TYPE. Save it in CU's hash
10019 table if necessary. */
10022 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
10024 struct dwarf2_offset_and_type
**slot
, ofs
;
10028 if (cu
->per_cu
== NULL
)
10031 if (cu
->per_cu
->type_hash
== NULL
)
10032 cu
->per_cu
->type_hash
10033 = htab_create_alloc_ex (cu
->header
.length
/ 24,
10034 offset_and_type_hash
,
10035 offset_and_type_eq
,
10037 &cu
->objfile
->objfile_obstack
,
10038 hashtab_obstack_allocate
,
10039 dummy_obstack_deallocate
);
10041 ofs
.offset
= die
->offset
;
10043 slot
= (struct dwarf2_offset_and_type
**)
10044 htab_find_slot_with_hash (cu
->per_cu
->type_hash
, &ofs
, ofs
.offset
, INSERT
);
10045 *slot
= obstack_alloc (&cu
->objfile
->objfile_obstack
, sizeof (**slot
));
10049 /* Find the type for DIE in TYPE_HASH, or return NULL if DIE does not
10050 have a saved type. */
10052 static struct type
*
10053 get_die_type (struct die_info
*die
, htab_t type_hash
)
10055 struct dwarf2_offset_and_type
*slot
, ofs
;
10057 ofs
.offset
= die
->offset
;
10058 slot
= htab_find_with_hash (type_hash
, &ofs
, ofs
.offset
);
10065 /* Restore the types of the DIE tree starting at START_DIE from the hash
10066 table saved in CU. */
10069 reset_die_and_siblings_types (struct die_info
*start_die
, struct dwarf2_cu
*cu
)
10071 struct die_info
*die
;
10073 if (cu
->per_cu
->type_hash
== NULL
)
10076 for (die
= start_die
; die
!= NULL
; die
= die
->sibling
)
10078 die
->type
= get_die_type (die
, cu
->per_cu
->type_hash
);
10079 if (die
->child
!= NULL
)
10080 reset_die_and_siblings_types (die
->child
, cu
);
10084 /* Set the mark field in CU and in every other compilation unit in the
10085 cache that we must keep because we are keeping CU. */
10087 /* Add a dependence relationship from CU to REF_PER_CU. */
10090 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
10091 struct dwarf2_per_cu_data
*ref_per_cu
)
10095 if (cu
->dependencies
== NULL
)
10097 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
10098 NULL
, &cu
->comp_unit_obstack
,
10099 hashtab_obstack_allocate
,
10100 dummy_obstack_deallocate
);
10102 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
10104 *slot
= ref_per_cu
;
10107 /* Set the mark field in CU and in every other compilation unit in the
10108 cache that we must keep because we are keeping CU. */
10111 dwarf2_mark_helper (void **slot
, void *data
)
10113 struct dwarf2_per_cu_data
*per_cu
;
10115 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
10116 if (per_cu
->cu
->mark
)
10118 per_cu
->cu
->mark
= 1;
10120 if (per_cu
->cu
->dependencies
!= NULL
)
10121 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10127 dwarf2_mark (struct dwarf2_cu
*cu
)
10132 if (cu
->dependencies
!= NULL
)
10133 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
10137 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
10141 per_cu
->cu
->mark
= 0;
10142 per_cu
= per_cu
->cu
->read_in_chain
;
10146 /* Trivial hash function for partial_die_info: the hash value of a DIE
10147 is its offset in .debug_info for this objfile. */
10150 partial_die_hash (const void *item
)
10152 const struct partial_die_info
*part_die
= item
;
10153 return part_die
->offset
;
10156 /* Trivial comparison function for partial_die_info structures: two DIEs
10157 are equal if they have the same offset. */
10160 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
10162 const struct partial_die_info
*part_die_lhs
= item_lhs
;
10163 const struct partial_die_info
*part_die_rhs
= item_rhs
;
10164 return part_die_lhs
->offset
== part_die_rhs
->offset
;
10167 static struct cmd_list_element
*set_dwarf2_cmdlist
;
10168 static struct cmd_list_element
*show_dwarf2_cmdlist
;
10171 set_dwarf2_cmd (char *args
, int from_tty
)
10173 help_list (set_dwarf2_cmdlist
, "maintenance set dwarf2 ", -1, gdb_stdout
);
10177 show_dwarf2_cmd (char *args
, int from_tty
)
10179 cmd_show_list (show_dwarf2_cmdlist
, from_tty
, "");
10182 void _initialize_dwarf2_read (void);
10185 _initialize_dwarf2_read (void)
10187 dwarf2_objfile_data_key
= register_objfile_data ();
10189 add_prefix_cmd ("dwarf2", class_maintenance
, set_dwarf2_cmd
, _("\
10190 Set DWARF 2 specific variables.\n\
10191 Configure DWARF 2 variables such as the cache size"),
10192 &set_dwarf2_cmdlist
, "maintenance set dwarf2 ",
10193 0/*allow-unknown*/, &maintenance_set_cmdlist
);
10195 add_prefix_cmd ("dwarf2", class_maintenance
, show_dwarf2_cmd
, _("\
10196 Show DWARF 2 specific variables\n\
10197 Show DWARF 2 variables such as the cache size"),
10198 &show_dwarf2_cmdlist
, "maintenance show dwarf2 ",
10199 0/*allow-unknown*/, &maintenance_show_cmdlist
);
10201 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
10202 &dwarf2_max_cache_age
, _("\
10203 Set the upper bound on the age of cached dwarf2 compilation units."), _("\
10204 Show the upper bound on the age of cached dwarf2 compilation units."), _("\
10205 A higher limit means that cached compilation units will be stored\n\
10206 in memory longer, and more total memory will be used. Zero disables\n\
10207 caching, which can slow down startup."),
10209 show_dwarf2_max_cache_age
,
10210 &set_dwarf2_cmdlist
,
10211 &show_dwarf2_cmdlist
);